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1da177e4 LT |
1 | /* |
2 | * | |
3 | * linux/drivers/s390/scsi/zfcp_fsf.c | |
4 | * | |
5 | * FCP adapter driver for IBM eServer zSeries | |
6 | * | |
7 | * (C) Copyright IBM Corp. 2002, 2004 | |
8 | * | |
9 | * Author(s): Martin Peschke <mpeschke@de.ibm.com> | |
10 | * Raimund Schroeder <raimund.schroeder@de.ibm.com> | |
11 | * Aron Zeh | |
12 | * Wolfgang Taphorn | |
13 | * Stefan Bader <stefan.bader@de.ibm.com> | |
14 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
15 | * Andreas Herrmann <aherrman@de.ibm.com> | |
16 | * Volker Sameske <sameske@de.ibm.com> | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2, or (at your option) | |
21 | * any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
31 | */ | |
32 | ||
33 | #define ZFCP_FSF_C_REVISION "$Revision: 1.92 $" | |
34 | ||
35 | #include "zfcp_ext.h" | |
36 | ||
37 | static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); | |
38 | static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); | |
39 | static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); | |
40 | static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); | |
41 | static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); | |
42 | static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); | |
43 | static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); | |
44 | static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); | |
45 | static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); | |
46 | static int zfcp_fsf_send_fcp_command_task_management_handler( | |
47 | struct zfcp_fsf_req *); | |
48 | static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); | |
49 | static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); | |
50 | static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); | |
51 | static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); | |
52 | static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); | |
53 | static inline int zfcp_fsf_req_sbal_check( | |
54 | unsigned long *, struct zfcp_qdio_queue *, int); | |
55 | static inline int zfcp_use_one_sbal( | |
56 | struct scatterlist *, int, struct scatterlist *, int); | |
57 | static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); | |
58 | static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *); | |
59 | static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); | |
60 | static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); | |
61 | static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); | |
62 | static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); | |
63 | static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *); | |
64 | static void zfcp_fsf_req_free(struct zfcp_fsf_req *); | |
65 | ||
66 | /* association between FSF command and FSF QTCB type */ | |
67 | static u32 fsf_qtcb_type[] = { | |
68 | [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, | |
69 | [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, | |
70 | [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, | |
71 | [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, | |
72 | [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, | |
73 | [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, | |
74 | [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, | |
75 | [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, | |
76 | [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, | |
77 | [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, | |
78 | [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, | |
79 | [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, | |
80 | [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND | |
81 | }; | |
82 | ||
83 | static const char zfcp_act_subtable_type[5][8] = { | |
84 | "unknown", "OS", "WWPN", "DID", "LUN" | |
85 | }; | |
86 | ||
87 | /****************************************************************/ | |
88 | /*************** FSF related Functions *************************/ | |
89 | /****************************************************************/ | |
90 | ||
91 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF | |
92 | ||
93 | /* | |
94 | * function: zfcp_fsf_req_alloc | |
95 | * | |
96 | * purpose: Obtains an fsf_req and potentially a qtcb (for all but | |
97 | * unsolicited requests) via helper functions | |
98 | * Does some initial fsf request set-up. | |
99 | * | |
100 | * returns: pointer to allocated fsf_req if successfull | |
101 | * NULL otherwise | |
102 | * | |
103 | * locks: none | |
104 | * | |
105 | */ | |
106 | static struct zfcp_fsf_req * | |
107 | zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) | |
108 | { | |
109 | size_t size; | |
110 | void *ptr; | |
111 | struct zfcp_fsf_req *fsf_req = NULL; | |
112 | ||
113 | if (req_flags & ZFCP_REQ_NO_QTCB) | |
114 | size = sizeof(struct zfcp_fsf_req); | |
115 | else | |
116 | size = sizeof(struct zfcp_fsf_req_pool_element); | |
117 | ||
118 | if (likely(pool != NULL)) | |
119 | ptr = mempool_alloc(pool, GFP_ATOMIC); | |
120 | else | |
121 | ptr = kmalloc(size, GFP_ATOMIC); | |
122 | ||
123 | if (unlikely(NULL == ptr)) | |
124 | goto out; | |
125 | ||
126 | memset(ptr, 0, size); | |
127 | ||
128 | if (req_flags & ZFCP_REQ_NO_QTCB) { | |
129 | fsf_req = (struct zfcp_fsf_req *) ptr; | |
130 | } else { | |
131 | fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req; | |
132 | fsf_req->qtcb = | |
133 | &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb; | |
134 | } | |
135 | ||
136 | fsf_req->pool = pool; | |
137 | ||
138 | out: | |
139 | return fsf_req; | |
140 | } | |
141 | ||
142 | /* | |
143 | * function: zfcp_fsf_req_free | |
144 | * | |
145 | * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or | |
146 | * returns it into the pool via helper functions. | |
147 | * | |
148 | * returns: sod all | |
149 | * | |
150 | * locks: none | |
151 | */ | |
152 | static void | |
153 | zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) | |
154 | { | |
155 | if (likely(fsf_req->pool != NULL)) | |
156 | mempool_free(fsf_req, fsf_req->pool); | |
157 | else | |
158 | kfree(fsf_req); | |
159 | } | |
160 | ||
161 | /* | |
162 | * function: | |
163 | * | |
164 | * purpose: | |
165 | * | |
166 | * returns: | |
167 | * | |
168 | * note: qdio queues shall be down (no ongoing inbound processing) | |
169 | */ | |
170 | int | |
171 | zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) | |
172 | { | |
173 | int retval = 0; | |
174 | struct zfcp_fsf_req *fsf_req, *tmp; | |
175 | ||
176 | list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head, | |
177 | list) | |
178 | zfcp_fsf_req_dismiss(fsf_req); | |
179 | /* wait_event_timeout? */ | |
180 | while (!list_empty(&adapter->fsf_req_list_head)) { | |
181 | ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n", | |
182 | zfcp_get_busid_by_adapter(adapter)); | |
183 | /* wait for woken intiators to clean up their requests */ | |
184 | msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT)); | |
185 | } | |
186 | ||
187 | /* consistency check */ | |
188 | if (atomic_read(&adapter->fsf_reqs_active)) { | |
189 | ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending " | |
190 | "on adapter %s after cleanup.\n", | |
191 | atomic_read(&adapter->fsf_reqs_active), | |
192 | zfcp_get_busid_by_adapter(adapter)); | |
193 | atomic_set(&adapter->fsf_reqs_active, 0); | |
194 | } | |
195 | ||
196 | return retval; | |
197 | } | |
198 | ||
199 | /* | |
200 | * function: | |
201 | * | |
202 | * purpose: | |
203 | * | |
204 | * returns: | |
205 | */ | |
206 | static void | |
207 | zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req) | |
208 | { | |
209 | fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; | |
210 | zfcp_fsf_req_complete(fsf_req); | |
211 | } | |
212 | ||
213 | /* | |
214 | * function: zfcp_fsf_req_complete | |
215 | * | |
216 | * purpose: Updates active counts and timers for openfcp-reqs | |
217 | * May cleanup request after req_eval returns | |
218 | * | |
219 | * returns: 0 - success | |
220 | * !0 - failure | |
221 | * | |
222 | * context: | |
223 | */ | |
224 | int | |
225 | zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) | |
226 | { | |
227 | int retval = 0; | |
228 | int cleanup; | |
229 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
230 | ||
231 | /* do some statistics */ | |
232 | atomic_dec(&adapter->fsf_reqs_active); | |
233 | ||
234 | if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { | |
235 | ZFCP_LOG_DEBUG("Status read response received\n"); | |
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; | |
242 | } else | |
243 | zfcp_fsf_protstatus_eval(fsf_req); | |
244 | ||
245 | /* | |
246 | * fsf_req may be deleted due to waking up functions, so | |
247 | * cleanup is saved here and used later | |
248 | */ | |
249 | if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) | |
250 | cleanup = 1; | |
251 | else | |
252 | cleanup = 0; | |
253 | ||
254 | fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; | |
255 | ||
256 | /* cleanup request if requested by initiator */ | |
257 | if (likely(cleanup)) { | |
258 | ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req); | |
259 | /* | |
260 | * lock must not be held here since it will be | |
261 | * grabed by the called routine, too | |
262 | */ | |
263 | zfcp_fsf_req_cleanup(fsf_req); | |
264 | } else { | |
265 | /* notify initiator waiting for the requests completion */ | |
266 | ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req); | |
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 | * | |
291 | * returns: | |
292 | * | |
293 | * context: | |
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; | |
302 | ||
303 | ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb); | |
304 | ||
305 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { | |
306 | ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n", | |
307 | (unsigned long) fsf_req); | |
308 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | | |
309 | ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ | |
310 | zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0); | |
311 | goto skip_protstatus; | |
312 | } | |
313 | ||
314 | /* log additional information provided by FSF (if any) */ | |
315 | if (unlikely(fsf_req->qtcb->header.log_length)) { | |
316 | /* do not trust them ;-) */ | |
317 | if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) { | |
318 | ZFCP_LOG_NORMAL | |
319 | ("bug: ULP (FSF logging) log data starts " | |
320 | "beyond end of packet header. Ignored. " | |
321 | "(start=%i, size=%li)\n", | |
322 | fsf_req->qtcb->header.log_start, | |
323 | sizeof(struct fsf_qtcb)); | |
324 | goto forget_log; | |
325 | } | |
326 | if ((size_t) (fsf_req->qtcb->header.log_start + | |
327 | fsf_req->qtcb->header.log_length) | |
328 | > sizeof(struct fsf_qtcb)) { | |
329 | ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends " | |
330 | "beyond end of packet header. Ignored. " | |
331 | "(start=%i, length=%i, size=%li)\n", | |
332 | fsf_req->qtcb->header.log_start, | |
333 | fsf_req->qtcb->header.log_length, | |
334 | sizeof(struct fsf_qtcb)); | |
335 | goto forget_log; | |
336 | } | |
337 | ZFCP_LOG_TRACE("ULP log data: \n"); | |
338 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, | |
339 | (char *) fsf_req->qtcb + | |
340 | fsf_req->qtcb->header.log_start, | |
341 | fsf_req->qtcb->header.log_length); | |
342 | } | |
343 | forget_log: | |
344 | ||
345 | /* evaluate FSF Protocol Status */ | |
346 | switch (fsf_req->qtcb->prefix.prot_status) { | |
347 | ||
348 | case FSF_PROT_GOOD: | |
1da177e4 | 349 | case FSF_PROT_FSF_STATUS_PRESENTED: |
1da177e4 LT |
350 | break; |
351 | ||
352 | case FSF_PROT_QTCB_VERSION_ERROR: | |
1da177e4 LT |
353 | ZFCP_LOG_NORMAL("error: The adapter %s contains " |
354 | "microcode of version 0x%x, the device driver " | |
355 | "only supports 0x%x. Aborting.\n", | |
356 | zfcp_get_busid_by_adapter(adapter), | |
357 | fsf_req->qtcb->prefix.prot_status_qual. | |
358 | version_error.fsf_version, ZFCP_QTCB_VERSION); | |
359 | /* stop operation for this adapter */ | |
360 | debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err"); | |
361 | zfcp_erp_adapter_shutdown(adapter, 0); | |
362 | zfcp_cmd_dbf_event_fsf("qverserr", fsf_req, | |
363 | &fsf_req->qtcb->prefix.prot_status_qual, | |
364 | sizeof (union fsf_prot_status_qual)); | |
365 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
366 | break; | |
367 | ||
368 | case FSF_PROT_SEQ_NUMB_ERROR: | |
1da177e4 LT |
369 | ZFCP_LOG_NORMAL("bug: Sequence number mismatch between " |
370 | "driver (0x%x) and adapter %s (0x%x). " | |
371 | "Restarting all operations on this adapter.\n", | |
372 | fsf_req->qtcb->prefix.req_seq_no, | |
373 | zfcp_get_busid_by_adapter(adapter), | |
374 | fsf_req->qtcb->prefix.prot_status_qual. | |
375 | sequence_error.exp_req_seq_no); | |
376 | debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err"); | |
377 | /* restart operation on this adapter */ | |
378 | zfcp_erp_adapter_reopen(adapter, 0); | |
379 | zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req, | |
380 | &fsf_req->qtcb->prefix.prot_status_qual, | |
381 | sizeof (union fsf_prot_status_qual)); | |
382 | fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; | |
383 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
384 | break; | |
385 | ||
386 | case FSF_PROT_UNSUPP_QTCB_TYPE: | |
1da177e4 LT |
387 | ZFCP_LOG_NORMAL("error: Packet header type used by the " |
388 | "device driver is incompatible with " | |
389 | "that used on adapter %s. " | |
390 | "Stopping all operations on this adapter.\n", | |
391 | zfcp_get_busid_by_adapter(adapter)); | |
392 | debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb"); | |
393 | zfcp_erp_adapter_shutdown(adapter, 0); | |
394 | zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req, | |
395 | &fsf_req->qtcb->prefix.prot_status_qual, | |
396 | sizeof (union fsf_prot_status_qual)); | |
397 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
398 | break; | |
399 | ||
400 | case FSF_PROT_HOST_CONNECTION_INITIALIZING: | |
1da177e4 LT |
401 | zfcp_cmd_dbf_event_fsf("hconinit", fsf_req, |
402 | &fsf_req->qtcb->prefix.prot_status_qual, | |
403 | sizeof (union fsf_prot_status_qual)); | |
404 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
405 | atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
406 | &(adapter->status)); | |
407 | debug_text_event(adapter->erp_dbf, 3, "prot_con_init"); | |
408 | break; | |
409 | ||
410 | case FSF_PROT_DUPLICATE_REQUEST_ID: | |
1da177e4 LT |
411 | if (fsf_req->qtcb) { |
412 | ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx " | |
413 | "to the adapter %s is ambiguous. " | |
414 | "Stopping all operations on this " | |
415 | "adapter.\n", | |
416 | *(unsigned long long *) | |
417 | (&fsf_req->qtcb->bottom.support. | |
418 | req_handle), | |
419 | zfcp_get_busid_by_adapter(adapter)); | |
420 | } else { | |
421 | ZFCP_LOG_NORMAL("bug: The request identifier %p " | |
422 | "to the adapter %s is ambiguous. " | |
423 | "Stopping all operations on this " | |
424 | "adapter. " | |
425 | "(bug: got this for an unsolicited " | |
426 | "status read request)\n", | |
427 | fsf_req, | |
428 | zfcp_get_busid_by_adapter(adapter)); | |
429 | } | |
430 | debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id"); | |
431 | zfcp_erp_adapter_shutdown(adapter, 0); | |
432 | zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req, | |
433 | &fsf_req->qtcb->prefix.prot_status_qual, | |
434 | sizeof (union fsf_prot_status_qual)); | |
435 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
436 | break; | |
437 | ||
438 | case FSF_PROT_LINK_DOWN: | |
1da177e4 LT |
439 | /* |
440 | * 'test and set' is not atomic here - | |
441 | * it's ok as long as calls to our response queue handler | |
442 | * (and thus execution of this code here) are serialized | |
443 | * by the qdio module | |
444 | */ | |
445 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, | |
446 | &adapter->status)) { | |
447 | switch (fsf_req->qtcb->prefix.prot_status_qual. | |
448 | locallink_error.code) { | |
449 | case FSF_PSQ_LINK_NOLIGHT: | |
450 | ZFCP_LOG_INFO("The local link to adapter %s " | |
451 | "is down (no light detected).\n", | |
452 | zfcp_get_busid_by_adapter( | |
453 | adapter)); | |
454 | break; | |
455 | case FSF_PSQ_LINK_WRAPPLUG: | |
456 | ZFCP_LOG_INFO("The local link to adapter %s " | |
457 | "is down (wrap plug detected).\n", | |
458 | zfcp_get_busid_by_adapter( | |
459 | adapter)); | |
460 | break; | |
461 | case FSF_PSQ_LINK_NOFCP: | |
462 | ZFCP_LOG_INFO("The local link to adapter %s " | |
463 | "is down (adjacent node on " | |
464 | "link does not support FCP).\n", | |
465 | zfcp_get_busid_by_adapter( | |
466 | adapter)); | |
467 | break; | |
468 | default: | |
469 | ZFCP_LOG_INFO("The local link to adapter %s " | |
470 | "is down " | |
471 | "(warning: unknown reason " | |
472 | "code).\n", | |
473 | zfcp_get_busid_by_adapter( | |
474 | adapter)); | |
475 | break; | |
476 | ||
477 | } | |
478 | /* | |
479 | * Due to the 'erp failed' flag the adapter won't | |
480 | * be recovered but will be just set to 'blocked' | |
481 | * state. All subordinary devices will have state | |
482 | * 'blocked' and 'erp failed', too. | |
483 | * Thus the adapter is still able to provide | |
484 | * 'link up' status without being flooded with | |
485 | * requests. | |
486 | * (note: even 'close port' is not permitted) | |
487 | */ | |
488 | ZFCP_LOG_INFO("Stopping all operations for adapter " | |
489 | "%s.\n", | |
490 | zfcp_get_busid_by_adapter(adapter)); | |
491 | atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | | |
492 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
493 | &adapter->status); | |
494 | zfcp_erp_adapter_reopen(adapter, 0); | |
1da177e4 LT |
495 | } |
496 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
497 | break; | |
498 | ||
499 | case FSF_PROT_REEST_QUEUE: | |
1da177e4 LT |
500 | debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue"); |
501 | ZFCP_LOG_INFO("The local link to adapter with " | |
502 | "%s was re-plugged. " | |
503 | "Re-starting operations on this adapter.\n", | |
504 | zfcp_get_busid_by_adapter(adapter)); | |
505 | /* All ports should be marked as ready to run again */ | |
506 | zfcp_erp_modify_adapter_status(adapter, | |
507 | ZFCP_STATUS_COMMON_RUNNING, | |
508 | ZFCP_SET); | |
509 | zfcp_erp_adapter_reopen(adapter, | |
510 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
511 | | ZFCP_STATUS_COMMON_ERP_FAILED); | |
512 | zfcp_cmd_dbf_event_fsf("reestque", fsf_req, | |
513 | &fsf_req->qtcb->prefix.prot_status_qual, | |
514 | sizeof (union fsf_prot_status_qual)); | |
515 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
516 | break; | |
517 | ||
518 | case FSF_PROT_ERROR_STATE: | |
1da177e4 LT |
519 | ZFCP_LOG_NORMAL("error: The adapter %s " |
520 | "has entered the error state. " | |
521 | "Restarting all operations on this " | |
522 | "adapter.\n", | |
523 | zfcp_get_busid_by_adapter(adapter)); | |
524 | debug_text_event(adapter->erp_dbf, 0, "prot_err_sta"); | |
525 | /* restart operation on this adapter */ | |
526 | zfcp_erp_adapter_reopen(adapter, 0); | |
527 | zfcp_cmd_dbf_event_fsf("proterrs", fsf_req, | |
528 | &fsf_req->qtcb->prefix.prot_status_qual, | |
529 | sizeof (union fsf_prot_status_qual)); | |
530 | fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; | |
531 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
532 | break; | |
533 | ||
534 | default: | |
535 | ZFCP_LOG_NORMAL("bug: Transfer protocol status information " | |
536 | "provided by the adapter %s " | |
537 | "is not compatible with the device driver. " | |
538 | "Stopping all operations on this adapter. " | |
539 | "(debug info 0x%x).\n", | |
540 | zfcp_get_busid_by_adapter(adapter), | |
541 | fsf_req->qtcb->prefix.prot_status); | |
542 | debug_text_event(adapter->erp_dbf, 0, "prot_inval:"); | |
543 | debug_exception(adapter->erp_dbf, 0, | |
544 | &fsf_req->qtcb->prefix.prot_status, | |
545 | sizeof (u32)); | |
546 | zfcp_erp_adapter_shutdown(adapter, 0); | |
547 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
548 | } | |
549 | ||
550 | skip_protstatus: | |
551 | /* | |
552 | * always call specific handlers to give them a chance to do | |
553 | * something meaningful even in error cases | |
554 | */ | |
555 | zfcp_fsf_fsfstatus_eval(fsf_req); | |
556 | return retval; | |
557 | } | |
558 | ||
559 | /* | |
560 | * function: zfcp_fsf_fsfstatus_eval | |
561 | * | |
562 | * purpose: evaluates FSF status of completed FSF request | |
563 | * and acts accordingly | |
564 | * | |
565 | * returns: | |
566 | */ | |
567 | static int | |
568 | zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) | |
569 | { | |
570 | int retval = 0; | |
571 | ||
572 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
573 | goto skip_fsfstatus; | |
574 | } | |
575 | ||
576 | /* evaluate FSF Status */ | |
577 | switch (fsf_req->qtcb->header.fsf_status) { | |
578 | case FSF_UNKNOWN_COMMAND: | |
1da177e4 LT |
579 | ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " |
580 | "not known by the adapter %s " | |
581 | "Stopping all operations on this adapter. " | |
582 | "(debug info 0x%x).\n", | |
583 | zfcp_get_busid_by_adapter(fsf_req->adapter), | |
584 | fsf_req->qtcb->header.fsf_command); | |
585 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, | |
586 | "fsf_s_unknown"); | |
587 | zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); | |
588 | zfcp_cmd_dbf_event_fsf("unknownc", fsf_req, | |
589 | &fsf_req->qtcb->header.fsf_status_qual, | |
590 | sizeof (union fsf_status_qual)); | |
591 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
592 | break; | |
593 | ||
594 | case FSF_FCP_RSP_AVAILABLE: | |
1da177e4 LT |
595 | ZFCP_LOG_DEBUG("FCP Sense data will be presented to the " |
596 | "SCSI stack.\n"); | |
597 | debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp"); | |
598 | break; | |
599 | ||
600 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
601 | debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus"); |
602 | zfcp_fsf_fsfstatus_qual_eval(fsf_req); | |
603 | break; | |
604 | ||
605 | default: | |
606 | break; | |
607 | } | |
608 | ||
609 | skip_fsfstatus: | |
610 | /* | |
611 | * always call specific handlers to give them a chance to do | |
612 | * something meaningful even in error cases | |
613 | */ | |
614 | zfcp_fsf_req_dispatch(fsf_req); | |
615 | ||
616 | return retval; | |
617 | } | |
618 | ||
619 | /* | |
620 | * function: zfcp_fsf_fsfstatus_qual_eval | |
621 | * | |
622 | * purpose: evaluates FSF status-qualifier of completed FSF request | |
623 | * and acts accordingly | |
624 | * | |
625 | * returns: | |
626 | */ | |
627 | static int | |
628 | zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) | |
629 | { | |
630 | int retval = 0; | |
631 | ||
632 | switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { | |
633 | case FSF_SQ_FCP_RSP_AVAILABLE: | |
1da177e4 LT |
634 | debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp"); |
635 | break; | |
636 | case FSF_SQ_RETRY_IF_POSSIBLE: | |
1da177e4 LT |
637 | /* The SCSI-stack may now issue retries or escalate */ |
638 | debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry"); | |
639 | zfcp_cmd_dbf_event_fsf("sqretry", fsf_req, | |
640 | &fsf_req->qtcb->header.fsf_status_qual, | |
641 | sizeof (union fsf_status_qual)); | |
642 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
643 | break; | |
644 | case FSF_SQ_COMMAND_ABORTED: | |
1da177e4 LT |
645 | /* Carry the aborted state on to upper layer */ |
646 | debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort"); | |
647 | zfcp_cmd_dbf_event_fsf("sqabort", fsf_req, | |
648 | &fsf_req->qtcb->header.fsf_status_qual, | |
649 | sizeof (union fsf_status_qual)); | |
650 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; | |
651 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
652 | break; | |
653 | case FSF_SQ_NO_RECOM: | |
1da177e4 LT |
654 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, |
655 | "fsf_sq_no_rec"); | |
656 | ZFCP_LOG_NORMAL("bug: No recommendation could be given for a" | |
657 | "problem on the adapter %s " | |
658 | "Stopping all operations on this adapter. ", | |
659 | zfcp_get_busid_by_adapter(fsf_req->adapter)); | |
660 | zfcp_erp_adapter_shutdown(fsf_req->adapter, 0); | |
661 | zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req, | |
662 | &fsf_req->qtcb->header.fsf_status_qual, | |
663 | sizeof (union fsf_status_qual)); | |
664 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
665 | break; | |
666 | case FSF_SQ_ULP_PROGRAMMING_ERROR: | |
1da177e4 LT |
667 | ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer " |
668 | "(adapter %s)\n", | |
669 | zfcp_get_busid_by_adapter(fsf_req->adapter)); | |
670 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, | |
671 | "fsf_sq_ulp_err"); | |
672 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
673 | break; | |
674 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
675 | case FSF_SQ_NO_RETRY_POSSIBLE: | |
676 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
677 | /* dealt with in the respective functions */ | |
678 | break; | |
679 | default: | |
680 | ZFCP_LOG_NORMAL("bug: Additional status info could " | |
681 | "not be interpreted properly.\n"); | |
682 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, | |
683 | (char *) &fsf_req->qtcb->header.fsf_status_qual, | |
684 | sizeof (union fsf_status_qual)); | |
685 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:"); | |
686 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
687 | &fsf_req->qtcb->header.fsf_status_qual.word[0], | |
688 | sizeof (u32)); | |
689 | zfcp_cmd_dbf_event_fsf("squndef", fsf_req, | |
690 | &fsf_req->qtcb->header.fsf_status_qual, | |
691 | sizeof (union fsf_status_qual)); | |
692 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
693 | break; | |
694 | } | |
695 | ||
696 | return retval; | |
697 | } | |
698 | ||
699 | /* | |
700 | * function: zfcp_fsf_req_dispatch | |
701 | * | |
702 | * purpose: calls the appropriate command specific handler | |
703 | * | |
704 | * returns: | |
705 | */ | |
706 | static int | |
707 | zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) | |
708 | { | |
709 | struct zfcp_erp_action *erp_action = fsf_req->erp_action; | |
710 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
711 | int retval = 0; | |
712 | ||
713 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
714 | ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb); | |
715 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, | |
716 | (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb)); | |
717 | } | |
718 | ||
719 | switch (fsf_req->fsf_command) { | |
720 | ||
721 | case FSF_QTCB_FCP_CMND: | |
1da177e4 LT |
722 | zfcp_fsf_send_fcp_command_handler(fsf_req); |
723 | break; | |
724 | ||
725 | case FSF_QTCB_ABORT_FCP_CMND: | |
1da177e4 LT |
726 | zfcp_fsf_abort_fcp_command_handler(fsf_req); |
727 | break; | |
728 | ||
729 | case FSF_QTCB_SEND_GENERIC: | |
1da177e4 LT |
730 | zfcp_fsf_send_ct_handler(fsf_req); |
731 | break; | |
732 | ||
733 | case FSF_QTCB_OPEN_PORT_WITH_DID: | |
1da177e4 LT |
734 | zfcp_fsf_open_port_handler(fsf_req); |
735 | break; | |
736 | ||
737 | case FSF_QTCB_OPEN_LUN: | |
1da177e4 LT |
738 | zfcp_fsf_open_unit_handler(fsf_req); |
739 | break; | |
740 | ||
741 | case FSF_QTCB_CLOSE_LUN: | |
1da177e4 LT |
742 | zfcp_fsf_close_unit_handler(fsf_req); |
743 | break; | |
744 | ||
745 | case FSF_QTCB_CLOSE_PORT: | |
1da177e4 LT |
746 | zfcp_fsf_close_port_handler(fsf_req); |
747 | break; | |
748 | ||
749 | case FSF_QTCB_CLOSE_PHYSICAL_PORT: | |
1da177e4 LT |
750 | zfcp_fsf_close_physical_port_handler(fsf_req); |
751 | break; | |
752 | ||
753 | case FSF_QTCB_EXCHANGE_CONFIG_DATA: | |
1da177e4 LT |
754 | zfcp_fsf_exchange_config_data_handler(fsf_req); |
755 | break; | |
756 | ||
757 | case FSF_QTCB_EXCHANGE_PORT_DATA: | |
1da177e4 LT |
758 | zfcp_fsf_exchange_port_data_handler(fsf_req); |
759 | break; | |
760 | ||
761 | case FSF_QTCB_SEND_ELS: | |
1da177e4 LT |
762 | zfcp_fsf_send_els_handler(fsf_req); |
763 | break; | |
764 | ||
765 | case FSF_QTCB_DOWNLOAD_CONTROL_FILE: | |
1da177e4 LT |
766 | zfcp_fsf_control_file_handler(fsf_req); |
767 | break; | |
768 | ||
769 | case FSF_QTCB_UPLOAD_CONTROL_FILE: | |
1da177e4 LT |
770 | zfcp_fsf_control_file_handler(fsf_req); |
771 | break; | |
772 | ||
773 | default: | |
1da177e4 LT |
774 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
775 | ZFCP_LOG_NORMAL("bug: Command issued by the device driver is " | |
776 | "not supported by the adapter %s\n", | |
777 | zfcp_get_busid_by_adapter(fsf_req->adapter)); | |
778 | if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command) | |
779 | ZFCP_LOG_NORMAL | |
780 | ("bug: Command issued by the device driver differs " | |
781 | "from the command returned by the adapter %s " | |
782 | "(debug info 0x%x, 0x%x).\n", | |
783 | zfcp_get_busid_by_adapter(fsf_req->adapter), | |
784 | fsf_req->fsf_command, | |
785 | fsf_req->qtcb->header.fsf_command); | |
786 | } | |
787 | ||
788 | if (!erp_action) | |
789 | return retval; | |
790 | ||
791 | debug_text_event(adapter->erp_dbf, 3, "a_frh"); | |
792 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); | |
793 | zfcp_erp_async_handler(erp_action, 0); | |
794 | ||
795 | return retval; | |
796 | } | |
797 | ||
798 | /* | |
799 | * function: zfcp_fsf_status_read | |
800 | * | |
801 | * purpose: initiates a Status Read command at the specified adapter | |
802 | * | |
803 | * returns: | |
804 | */ | |
805 | int | |
806 | zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) | |
807 | { | |
808 | struct zfcp_fsf_req *fsf_req; | |
809 | struct fsf_status_read_buffer *status_buffer; | |
810 | unsigned long lock_flags; | |
811 | volatile struct qdio_buffer_element *sbale; | |
812 | int retval = 0; | |
813 | ||
814 | /* setup new FSF request */ | |
815 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, | |
816 | req_flags | ZFCP_REQ_NO_QTCB, | |
817 | adapter->pool.fsf_req_status_read, | |
818 | &lock_flags, &fsf_req); | |
819 | if (retval < 0) { | |
820 | ZFCP_LOG_INFO("error: Could not create unsolicited status " | |
821 | "buffer for adapter %s.\n", | |
822 | zfcp_get_busid_by_adapter(adapter)); | |
823 | goto failed_req_create; | |
824 | } | |
825 | ||
826 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
827 | sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; | |
828 | sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; | |
829 | fsf_req->sbale_curr = 2; | |
830 | ||
831 | status_buffer = | |
832 | mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); | |
833 | if (!status_buffer) { | |
834 | ZFCP_LOG_NORMAL("bug: could not get some buffer\n"); | |
835 | goto failed_buf; | |
836 | } | |
837 | memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); | |
838 | fsf_req->data.status_read.buffer = status_buffer; | |
839 | ||
840 | /* insert pointer to respective buffer */ | |
841 | sbale = zfcp_qdio_sbale_curr(fsf_req); | |
842 | sbale->addr = (void *) status_buffer; | |
843 | sbale->length = sizeof(struct fsf_status_read_buffer); | |
844 | ||
845 | /* start QDIO request for this FSF request */ | |
846 | retval = zfcp_fsf_req_send(fsf_req, NULL); | |
847 | if (retval) { | |
848 | ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status " | |
849 | "environment.\n"); | |
850 | goto failed_req_send; | |
851 | } | |
852 | ||
853 | ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n", | |
854 | zfcp_get_busid_by_adapter(adapter)); | |
855 | goto out; | |
856 | ||
857 | failed_req_send: | |
858 | mempool_free(status_buffer, adapter->pool.data_status_read); | |
859 | ||
860 | failed_buf: | |
861 | zfcp_fsf_req_free(fsf_req); | |
862 | failed_req_create: | |
863 | out: | |
864 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); | |
865 | return retval; | |
866 | } | |
867 | ||
868 | static int | |
869 | zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) | |
870 | { | |
871 | struct fsf_status_read_buffer *status_buffer; | |
872 | struct zfcp_adapter *adapter; | |
873 | struct zfcp_port *port; | |
874 | unsigned long flags; | |
875 | ||
876 | status_buffer = fsf_req->data.status_read.buffer; | |
877 | adapter = fsf_req->adapter; | |
878 | ||
879 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
880 | list_for_each_entry(port, &adapter->port_list_head, list) | |
881 | if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) | |
882 | break; | |
883 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
884 | ||
885 | if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) { | |
886 | ZFCP_LOG_NORMAL("bug: Reopen port indication received for" | |
887 | "nonexisting port with d_id 0x%08x on " | |
888 | "adapter %s. Ignored.\n", | |
889 | status_buffer->d_id & ZFCP_DID_MASK, | |
890 | zfcp_get_busid_by_adapter(adapter)); | |
891 | goto out; | |
892 | } | |
893 | ||
894 | switch (status_buffer->status_subtype) { | |
895 | ||
896 | case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: | |
1da177e4 LT |
897 | debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:"); |
898 | zfcp_erp_port_reopen(port, 0); | |
899 | break; | |
900 | ||
901 | case FSF_STATUS_READ_SUB_ERROR_PORT: | |
1da177e4 LT |
902 | debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:"); |
903 | zfcp_erp_port_shutdown(port, 0); | |
904 | break; | |
905 | ||
906 | default: | |
907 | debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:"); | |
908 | debug_exception(adapter->erp_dbf, 0, | |
909 | &status_buffer->status_subtype, sizeof (u32)); | |
910 | ZFCP_LOG_NORMAL("bug: Undefined status subtype received " | |
911 | "for a reopen indication on port with " | |
912 | "d_id 0x%08x on the adapter %s. " | |
913 | "Ignored. (debug info 0x%x)\n", | |
914 | status_buffer->d_id, | |
915 | zfcp_get_busid_by_adapter(adapter), | |
916 | status_buffer->status_subtype); | |
917 | } | |
918 | out: | |
919 | return 0; | |
920 | } | |
921 | ||
922 | /* | |
923 | * function: zfcp_fsf_status_read_handler | |
924 | * | |
925 | * purpose: is called for finished Open Port command | |
926 | * | |
927 | * returns: | |
928 | */ | |
929 | static int | |
930 | zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) | |
931 | { | |
932 | int retval = 0; | |
933 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
934 | struct fsf_status_read_buffer *status_buffer = | |
935 | fsf_req->data.status_read.buffer; | |
936 | ||
937 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { | |
938 | mempool_free(status_buffer, adapter->pool.data_status_read); | |
939 | zfcp_fsf_req_cleanup(fsf_req); | |
940 | goto out; | |
941 | } | |
942 | ||
943 | switch (status_buffer->status_type) { | |
944 | ||
945 | case FSF_STATUS_READ_PORT_CLOSED: | |
1da177e4 LT |
946 | debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:"); |
947 | debug_event(adapter->erp_dbf, 3, | |
948 | &status_buffer->d_id, sizeof (u32)); | |
949 | zfcp_fsf_status_read_port_closed(fsf_req); | |
950 | break; | |
951 | ||
952 | case FSF_STATUS_READ_INCOMING_ELS: | |
1da177e4 LT |
953 | debug_text_event(adapter->erp_dbf, 3, "unsol_els:"); |
954 | zfcp_fsf_incoming_els(fsf_req); | |
955 | break; | |
956 | ||
957 | case FSF_STATUS_READ_SENSE_DATA_AVAIL: | |
1da177e4 LT |
958 | debug_text_event(adapter->erp_dbf, 3, "unsol_sense:"); |
959 | ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n", | |
960 | zfcp_get_busid_by_adapter(adapter)); | |
961 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer, | |
962 | sizeof(struct fsf_status_read_buffer)); | |
963 | break; | |
964 | ||
965 | case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: | |
1da177e4 LT |
966 | debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:"); |
967 | ZFCP_LOG_NORMAL("Bit error threshold data received:\n"); | |
968 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, | |
969 | (char *) status_buffer, | |
970 | sizeof (struct fsf_status_read_buffer)); | |
971 | break; | |
972 | ||
973 | case FSF_STATUS_READ_LINK_DOWN: | |
1da177e4 LT |
974 | debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:"); |
975 | ZFCP_LOG_INFO("Local link to adapter %s is down\n", | |
976 | zfcp_get_busid_by_adapter(adapter)); | |
977 | atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, | |
978 | &adapter->status); | |
979 | zfcp_erp_adapter_failed(adapter); | |
980 | break; | |
981 | ||
982 | case FSF_STATUS_READ_LINK_UP: | |
1da177e4 LT |
983 | debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:"); |
984 | ZFCP_LOG_INFO("Local link to adapter %s was replugged. " | |
985 | "Restarting operations on this adapter\n", | |
986 | zfcp_get_busid_by_adapter(adapter)); | |
987 | /* All ports should be marked as ready to run again */ | |
988 | zfcp_erp_modify_adapter_status(adapter, | |
989 | ZFCP_STATUS_COMMON_RUNNING, | |
990 | ZFCP_SET); | |
991 | zfcp_erp_adapter_reopen(adapter, | |
992 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
993 | | ZFCP_STATUS_COMMON_ERP_FAILED); | |
994 | break; | |
995 | ||
996 | case FSF_STATUS_READ_CFDC_UPDATED: | |
1da177e4 LT |
997 | debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:"); |
998 | ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n", | |
999 | zfcp_get_busid_by_adapter(adapter)); | |
1000 | zfcp_erp_adapter_access_changed(adapter); | |
1001 | break; | |
1002 | ||
1003 | case FSF_STATUS_READ_CFDC_HARDENED: | |
1da177e4 LT |
1004 | debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:"); |
1005 | switch (status_buffer->status_subtype) { | |
1006 | case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE: | |
1007 | ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n", | |
1008 | zfcp_get_busid_by_adapter(adapter)); | |
1009 | break; | |
1010 | case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2: | |
1011 | ZFCP_LOG_INFO("CFDC of adapter %s has been copied " | |
1012 | "to the secondary SE\n", | |
1013 | zfcp_get_busid_by_adapter(adapter)); | |
1014 | break; | |
1015 | default: | |
1016 | ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n", | |
1017 | zfcp_get_busid_by_adapter(adapter)); | |
1018 | } | |
1019 | break; | |
1020 | ||
1021 | default: | |
1022 | debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:"); | |
1023 | debug_exception(adapter->erp_dbf, 0, | |
1024 | &status_buffer->status_type, sizeof (u32)); | |
1025 | ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown " | |
1026 | "type was received (debug info 0x%x)\n", | |
1027 | status_buffer->status_type); | |
1028 | ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n", | |
1029 | status_buffer); | |
1030 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
1031 | (char *) status_buffer, | |
1032 | sizeof (struct fsf_status_read_buffer)); | |
1033 | break; | |
1034 | } | |
1035 | mempool_free(status_buffer, adapter->pool.data_status_read); | |
1036 | zfcp_fsf_req_cleanup(fsf_req); | |
1037 | /* | |
1038 | * recycle buffer and start new request repeat until outbound | |
1039 | * queue is empty or adapter shutdown is requested | |
1040 | */ | |
1041 | /* | |
1042 | * FIXME(qdio): | |
1043 | * we may wait in the req_create for 5s during shutdown, so | |
1044 | * qdio_cleanup will have to wait at least that long before returning | |
1045 | * with failure to allow us a proper cleanup under all circumstances | |
1046 | */ | |
1047 | /* | |
1048 | * FIXME: | |
1049 | * allocation failure possible? (Is this code needed?) | |
1050 | */ | |
1051 | retval = zfcp_fsf_status_read(adapter, 0); | |
1052 | if (retval < 0) { | |
1053 | ZFCP_LOG_INFO("Failed to create unsolicited status read " | |
1054 | "request for the adapter %s.\n", | |
1055 | zfcp_get_busid_by_adapter(adapter)); | |
1056 | /* temporary fix to avoid status read buffer shortage */ | |
1057 | adapter->status_read_failed++; | |
1058 | if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed) | |
1059 | < ZFCP_STATUS_READ_FAILED_THRESHOLD) { | |
1060 | ZFCP_LOG_INFO("restart adapter %s due to status read " | |
1061 | "buffer shortage\n", | |
1062 | zfcp_get_busid_by_adapter(adapter)); | |
1063 | zfcp_erp_adapter_reopen(adapter, 0); | |
1064 | } | |
1065 | } | |
1066 | out: | |
1067 | return retval; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * function: zfcp_fsf_abort_fcp_command | |
1072 | * | |
1073 | * purpose: tells FSF to abort a running SCSI command | |
1074 | * | |
1075 | * returns: address of initiated FSF request | |
1076 | * NULL - request could not be initiated | |
1077 | * | |
1078 | * FIXME(design): should be watched by a timeout !!! | |
1079 | * FIXME(design) shouldn't this be modified to return an int | |
1080 | * also...don't know how though | |
1081 | */ | |
1082 | struct zfcp_fsf_req * | |
1083 | zfcp_fsf_abort_fcp_command(unsigned long old_req_id, | |
1084 | struct zfcp_adapter *adapter, | |
1085 | struct zfcp_unit *unit, int req_flags) | |
1086 | { | |
1087 | volatile struct qdio_buffer_element *sbale; | |
1088 | unsigned long lock_flags; | |
1089 | struct zfcp_fsf_req *fsf_req = NULL; | |
1090 | int retval = 0; | |
1091 | ||
1092 | /* setup new FSF request */ | |
1093 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, | |
1094 | req_flags, adapter->pool.fsf_req_abort, | |
1095 | &lock_flags, &fsf_req); | |
1096 | if (retval < 0) { | |
1097 | ZFCP_LOG_INFO("error: Failed to create an abort command " | |
1098 | "request for lun 0x%016Lx on port 0x%016Lx " | |
1099 | "on adapter %s.\n", | |
1100 | unit->fcp_lun, | |
1101 | unit->port->wwpn, | |
1102 | zfcp_get_busid_by_adapter(adapter)); | |
1103 | goto out; | |
1104 | } | |
1105 | ||
1106 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
1107 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
1108 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1109 | ||
1110 | fsf_req->data.abort_fcp_command.unit = unit; | |
1111 | ||
1112 | /* set handles of unit and its parent port in QTCB */ | |
1113 | fsf_req->qtcb->header.lun_handle = unit->handle; | |
1114 | fsf_req->qtcb->header.port_handle = unit->port->handle; | |
1115 | ||
1116 | /* set handle of request which should be aborted */ | |
1117 | fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; | |
1118 | ||
1119 | /* start QDIO request for this FSF request */ | |
1120 | ||
1121 | zfcp_fsf_start_scsi_er_timer(adapter); | |
1122 | retval = zfcp_fsf_req_send(fsf_req, NULL); | |
1123 | if (retval) { | |
1124 | del_timer(&adapter->scsi_er_timer); | |
1125 | ZFCP_LOG_INFO("error: Failed to send abort command request " | |
1126 | "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", | |
1127 | zfcp_get_busid_by_adapter(adapter), | |
1128 | unit->port->wwpn, unit->fcp_lun); | |
1129 | zfcp_fsf_req_free(fsf_req); | |
1130 | fsf_req = NULL; | |
1131 | goto out; | |
1132 | } | |
1133 | ||
1134 | ZFCP_LOG_DEBUG("Abort FCP Command request initiated " | |
1135 | "(adapter%s, port d_id=0x%08x, " | |
1136 | "unit x%016Lx, old_req_id=0x%lx)\n", | |
1137 | zfcp_get_busid_by_adapter(adapter), | |
1138 | unit->port->d_id, | |
1139 | unit->fcp_lun, old_req_id); | |
1140 | out: | |
1141 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); | |
1142 | return fsf_req; | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * function: zfcp_fsf_abort_fcp_command_handler | |
1147 | * | |
1148 | * purpose: is called for finished Abort FCP Command request | |
1149 | * | |
1150 | * returns: | |
1151 | */ | |
1152 | static int | |
1153 | zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) | |
1154 | { | |
1155 | int retval = -EINVAL; | |
1156 | struct zfcp_unit *unit = new_fsf_req->data.abort_fcp_command.unit; | |
1157 | unsigned char status_qual = | |
1158 | new_fsf_req->qtcb->header.fsf_status_qual.word[0]; | |
1159 | ||
1160 | del_timer(&new_fsf_req->adapter->scsi_er_timer); | |
1161 | ||
1162 | if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
1163 | /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ | |
1164 | goto skip_fsfstatus; | |
1165 | } | |
1166 | ||
1167 | /* evaluate FSF status in QTCB */ | |
1168 | switch (new_fsf_req->qtcb->header.fsf_status) { | |
1169 | ||
1170 | case FSF_PORT_HANDLE_NOT_VALID: | |
1171 | if (status_qual >> 4 != status_qual % 0xf) { | |
1da177e4 LT |
1172 | debug_text_event(new_fsf_req->adapter->erp_dbf, 3, |
1173 | "fsf_s_phand_nv0"); | |
1174 | /* | |
1175 | * In this case a command that was sent prior to a port | |
1176 | * reopen was aborted (handles are different). This is | |
1177 | * fine. | |
1178 | */ | |
1179 | } else { | |
1da177e4 LT |
1180 | ZFCP_LOG_INFO("Temporary port identifier 0x%x for " |
1181 | "port 0x%016Lx on adapter %s invalid. " | |
1182 | "This may happen occasionally.\n", | |
1183 | unit->port->handle, | |
1184 | unit->port->wwpn, | |
1185 | zfcp_get_busid_by_unit(unit)); | |
1186 | ZFCP_LOG_INFO("status qualifier:\n"); | |
1187 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, | |
1188 | (char *) &new_fsf_req->qtcb->header. | |
1189 | fsf_status_qual, | |
1190 | sizeof (union fsf_status_qual)); | |
1191 | /* Let's hope this sorts out the mess */ | |
1192 | debug_text_event(new_fsf_req->adapter->erp_dbf, 1, | |
1193 | "fsf_s_phand_nv1"); | |
1194 | zfcp_erp_adapter_reopen(unit->port->adapter, 0); | |
1195 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1196 | } | |
1197 | break; | |
1198 | ||
1199 | case FSF_LUN_HANDLE_NOT_VALID: | |
1200 | if (status_qual >> 4 != status_qual % 0xf) { | |
1201 | /* 2 */ | |
1da177e4 LT |
1202 | debug_text_event(new_fsf_req->adapter->erp_dbf, 3, |
1203 | "fsf_s_lhand_nv0"); | |
1204 | /* | |
1205 | * In this case a command that was sent prior to a unit | |
1206 | * reopen was aborted (handles are different). | |
1207 | * This is fine. | |
1208 | */ | |
1209 | } else { | |
1da177e4 LT |
1210 | ZFCP_LOG_INFO |
1211 | ("Warning: Temporary LUN identifier 0x%x of LUN " | |
1212 | "0x%016Lx on port 0x%016Lx on adapter %s is " | |
1213 | "invalid. This may happen in rare cases. " | |
1214 | "Trying to re-establish link.\n", | |
1215 | unit->handle, | |
1216 | unit->fcp_lun, | |
1217 | unit->port->wwpn, | |
1218 | zfcp_get_busid_by_unit(unit)); | |
1219 | ZFCP_LOG_DEBUG("Status qualifier data:\n"); | |
1220 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
1221 | (char *) &new_fsf_req->qtcb->header. | |
1222 | fsf_status_qual, | |
1223 | sizeof (union fsf_status_qual)); | |
1224 | /* Let's hope this sorts out the mess */ | |
1225 | debug_text_event(new_fsf_req->adapter->erp_dbf, 1, | |
1226 | "fsf_s_lhand_nv1"); | |
1227 | zfcp_erp_port_reopen(unit->port, 0); | |
1228 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1229 | } | |
1230 | break; | |
1231 | ||
1232 | case FSF_FCP_COMMAND_DOES_NOT_EXIST: | |
1da177e4 LT |
1233 | retval = 0; |
1234 | debug_text_event(new_fsf_req->adapter->erp_dbf, 3, | |
1235 | "fsf_s_no_exist"); | |
1236 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; | |
1237 | break; | |
1238 | ||
1239 | case FSF_PORT_BOXED: | |
1da177e4 LT |
1240 | ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to " |
1241 | "be reopened\n", unit->port->wwpn, | |
1242 | zfcp_get_busid_by_unit(unit)); | |
1243 | debug_text_event(new_fsf_req->adapter->erp_dbf, 2, | |
1244 | "fsf_s_pboxed"); | |
1245 | zfcp_erp_port_reopen(unit->port, 0); | |
1246 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
1247 | | ZFCP_STATUS_FSFREQ_RETRY; | |
1248 | break; | |
1249 | ||
1250 | case FSF_LUN_BOXED: | |
1da177e4 LT |
1251 | ZFCP_LOG_INFO( |
1252 | "unit 0x%016Lx on port 0x%016Lx on adapter %s needs " | |
1253 | "to be reopened\n", | |
1254 | unit->fcp_lun, unit->port->wwpn, | |
1255 | zfcp_get_busid_by_unit(unit)); | |
1256 | debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); | |
1257 | zfcp_erp_unit_reopen(unit, 0); | |
1258 | zfcp_cmd_dbf_event_fsf("unitbox", new_fsf_req, | |
1259 | &new_fsf_req->qtcb->header.fsf_status_qual, | |
1260 | sizeof(union fsf_status_qual)); | |
1261 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
1262 | | ZFCP_STATUS_FSFREQ_RETRY; | |
1263 | break; | |
1264 | ||
1265 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1266 | switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { |
1267 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
1268 | debug_text_event(new_fsf_req->adapter->erp_dbf, 1, |
1269 | "fsf_sq_ltest"); | |
1270 | /* reopening link to port */ | |
1271 | zfcp_erp_port_reopen(unit->port, 0); | |
1272 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1273 | break; | |
1274 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
1275 | /* SCSI stack will escalate */ |
1276 | debug_text_event(new_fsf_req->adapter->erp_dbf, 1, | |
1277 | "fsf_sq_ulp"); | |
1278 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1279 | break; | |
1280 | default: | |
1281 | ZFCP_LOG_NORMAL | |
1282 | ("bug: Wrong status qualifier 0x%x arrived.\n", | |
1283 | new_fsf_req->qtcb->header.fsf_status_qual.word[0]); | |
1284 | debug_text_event(new_fsf_req->adapter->erp_dbf, 0, | |
1285 | "fsf_sq_inval:"); | |
1286 | debug_exception(new_fsf_req->adapter->erp_dbf, 0, | |
1287 | &new_fsf_req->qtcb->header. | |
1288 | fsf_status_qual.word[0], sizeof (u32)); | |
1289 | break; | |
1290 | } | |
1291 | break; | |
1292 | ||
1293 | case FSF_GOOD: | |
1da177e4 LT |
1294 | retval = 0; |
1295 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; | |
1296 | break; | |
1297 | ||
1298 | default: | |
1299 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
1300 | "(debug info 0x%x)\n", | |
1301 | new_fsf_req->qtcb->header.fsf_status); | |
1302 | debug_text_event(new_fsf_req->adapter->erp_dbf, 0, | |
1303 | "fsf_s_inval:"); | |
1304 | debug_exception(new_fsf_req->adapter->erp_dbf, 0, | |
1305 | &new_fsf_req->qtcb->header.fsf_status, | |
1306 | sizeof (u32)); | |
1307 | break; | |
1308 | } | |
1309 | skip_fsfstatus: | |
1310 | return retval; | |
1311 | } | |
1312 | ||
1313 | /** | |
1314 | * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into | |
1315 | * one SBALE | |
1316 | * Two scatter-gather lists are passed, one for the reqeust and one for the | |
1317 | * response. | |
1318 | */ | |
1319 | static inline int | |
1320 | zfcp_use_one_sbal(struct scatterlist *req, int req_count, | |
1321 | struct scatterlist *resp, int resp_count) | |
1322 | { | |
1323 | return ((req_count == 1) && | |
1324 | (resp_count == 1) && | |
1325 | (((unsigned long) zfcp_sg_to_address(&req[0]) & | |
1326 | PAGE_MASK) == | |
1327 | ((unsigned long) (zfcp_sg_to_address(&req[0]) + | |
1328 | req[0].length - 1) & PAGE_MASK)) && | |
1329 | (((unsigned long) zfcp_sg_to_address(&resp[0]) & | |
1330 | PAGE_MASK) == | |
1331 | ((unsigned long) (zfcp_sg_to_address(&resp[0]) + | |
1332 | resp[0].length - 1) & PAGE_MASK))); | |
1333 | } | |
1334 | ||
1335 | /** | |
1336 | * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) | |
1337 | * @ct: pointer to struct zfcp_send_ct which conatins all needed data for | |
1338 | * the request | |
1339 | * @pool: pointer to memory pool, if non-null this pool is used to allocate | |
1340 | * a struct zfcp_fsf_req | |
1341 | * @erp_action: pointer to erp_action, if non-null the Generic Service request | |
1342 | * is sent within error recovery | |
1343 | */ | |
1344 | int | |
1345 | zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, | |
1346 | struct zfcp_erp_action *erp_action) | |
1347 | { | |
1348 | volatile struct qdio_buffer_element *sbale; | |
1349 | struct zfcp_port *port; | |
1350 | struct zfcp_adapter *adapter; | |
1351 | struct zfcp_fsf_req *fsf_req; | |
1352 | unsigned long lock_flags; | |
1353 | int bytes; | |
1354 | int ret = 0; | |
1355 | ||
1356 | port = ct->port; | |
1357 | adapter = port->adapter; | |
1358 | ||
1359 | ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, | |
1360 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
1361 | pool, &lock_flags, &fsf_req); | |
1362 | if (ret < 0) { | |
1363 | ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for " | |
1364 | "adapter: %s\n", | |
1365 | zfcp_get_busid_by_adapter(adapter)); | |
1366 | goto failed_req; | |
1367 | } | |
1368 | ||
1369 | if (erp_action != NULL) { | |
1370 | erp_action->fsf_req = fsf_req; | |
1371 | fsf_req->erp_action = erp_action; | |
1372 | } | |
1373 | ||
1374 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
1375 | if (zfcp_use_one_sbal(ct->req, ct->req_count, | |
1376 | ct->resp, ct->resp_count)){ | |
1377 | /* both request buffer and response buffer | |
1378 | fit into one sbale each */ | |
1379 | sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; | |
1380 | sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); | |
1381 | sbale[2].length = ct->req[0].length; | |
1382 | sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); | |
1383 | sbale[3].length = ct->resp[0].length; | |
1384 | sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1385 | } else if (adapter->supported_features & | |
1386 | FSF_FEATURE_ELS_CT_CHAINED_SBALS) { | |
1387 | /* try to use chained SBALs */ | |
1388 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1389 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
1390 | ct->req, ct->req_count, | |
1391 | ZFCP_MAX_SBALS_PER_CT_REQ); | |
1392 | if (bytes <= 0) { | |
1393 | ZFCP_LOG_INFO("error: creation of CT request failed " | |
1394 | "on adapter %s\n", | |
1395 | zfcp_get_busid_by_adapter(adapter)); | |
1396 | if (bytes == 0) | |
1397 | ret = -ENOMEM; | |
1398 | else | |
1399 | ret = bytes; | |
1400 | ||
1401 | goto failed_send; | |
1402 | } | |
1403 | fsf_req->qtcb->bottom.support.req_buf_length = bytes; | |
1404 | fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; | |
1405 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1406 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
1407 | ct->resp, ct->resp_count, | |
1408 | ZFCP_MAX_SBALS_PER_CT_REQ); | |
1409 | if (bytes <= 0) { | |
1410 | ZFCP_LOG_INFO("error: creation of CT request failed " | |
1411 | "on adapter %s\n", | |
1412 | zfcp_get_busid_by_adapter(adapter)); | |
1413 | if (bytes == 0) | |
1414 | ret = -ENOMEM; | |
1415 | else | |
1416 | ret = bytes; | |
1417 | ||
1418 | goto failed_send; | |
1419 | } | |
1420 | fsf_req->qtcb->bottom.support.resp_buf_length = bytes; | |
1421 | } else { | |
1422 | /* reject send generic request */ | |
1423 | ZFCP_LOG_INFO( | |
1424 | "error: microcode does not support chained SBALs," | |
1425 | "CT request too big (adapter %s)\n", | |
1426 | zfcp_get_busid_by_adapter(adapter)); | |
1427 | ret = -EOPNOTSUPP; | |
1428 | goto failed_send; | |
1429 | } | |
1430 | ||
1431 | /* settings in QTCB */ | |
1432 | fsf_req->qtcb->header.port_handle = port->handle; | |
1433 | fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class; | |
1434 | fsf_req->qtcb->bottom.support.timeout = ct->timeout; | |
1435 | fsf_req->data.send_ct = ct; | |
1436 | ||
1437 | /* start QDIO request for this FSF request */ | |
1438 | ret = zfcp_fsf_req_send(fsf_req, ct->timer); | |
1439 | if (ret) { | |
1440 | ZFCP_LOG_DEBUG("error: initiation of CT request failed " | |
1441 | "(adapter %s, port 0x%016Lx)\n", | |
1442 | zfcp_get_busid_by_adapter(adapter), port->wwpn); | |
1443 | goto failed_send; | |
1444 | } | |
1445 | ||
1446 | ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n", | |
1447 | zfcp_get_busid_by_adapter(adapter), port->wwpn); | |
1448 | goto out; | |
1449 | ||
1450 | failed_send: | |
1451 | zfcp_fsf_req_free(fsf_req); | |
1452 | if (erp_action != NULL) { | |
1453 | erp_action->fsf_req = NULL; | |
1454 | } | |
1455 | failed_req: | |
1456 | out: | |
1457 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, | |
1458 | lock_flags); | |
1459 | return ret; | |
1460 | } | |
1461 | ||
1462 | /** | |
1463 | * zfcp_fsf_send_ct_handler - handler for Generic Service requests | |
1464 | * @fsf_req: pointer to struct zfcp_fsf_req | |
1465 | * | |
1466 | * Data specific for the Generic Service request is passed by | |
1467 | * fsf_req->data.send_ct | |
1468 | * Usually a specific handler for the request is called via | |
1469 | * fsf_req->data.send_ct->handler at end of this function. | |
1470 | */ | |
1471 | static int | |
1472 | zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) | |
1473 | { | |
1474 | struct zfcp_port *port; | |
1475 | struct zfcp_adapter *adapter; | |
1476 | struct zfcp_send_ct *send_ct; | |
1477 | struct fsf_qtcb_header *header; | |
1478 | struct fsf_qtcb_bottom_support *bottom; | |
1479 | int retval = -EINVAL; | |
1480 | u16 subtable, rule, counter; | |
1481 | ||
1482 | adapter = fsf_req->adapter; | |
1483 | send_ct = fsf_req->data.send_ct; | |
1484 | port = send_ct->port; | |
1485 | header = &fsf_req->qtcb->header; | |
1486 | bottom = &fsf_req->qtcb->bottom.support; | |
1487 | ||
1488 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
1489 | goto skip_fsfstatus; | |
1490 | ||
1491 | /* evaluate FSF status in QTCB */ | |
1492 | switch (header->fsf_status) { | |
1493 | ||
1494 | case FSF_GOOD: | |
1da177e4 LT |
1495 | retval = 0; |
1496 | break; | |
1497 | ||
1498 | case FSF_SERVICE_CLASS_NOT_SUPPORTED: | |
1da177e4 LT |
1499 | if (adapter->fc_service_class <= 3) { |
1500 | ZFCP_LOG_INFO("error: adapter %s does not support fc " | |
1501 | "class %d.\n", | |
1502 | zfcp_get_busid_by_port(port), | |
1503 | adapter->fc_service_class); | |
1504 | } else { | |
1505 | ZFCP_LOG_INFO("bug: The fibre channel class at the " | |
1506 | "adapter %s is invalid. " | |
1507 | "(debug info %d)\n", | |
1508 | zfcp_get_busid_by_port(port), | |
1509 | adapter->fc_service_class); | |
1510 | } | |
1511 | /* stop operation for this adapter */ | |
1512 | debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); | |
1513 | zfcp_erp_adapter_shutdown(adapter, 0); | |
1514 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1515 | break; | |
1516 | ||
1517 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1518 | switch (header->fsf_status_qual.word[0]){ |
1519 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
1520 | /* reopening link to port */ |
1521 | debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); | |
1522 | zfcp_test_link(port); | |
1523 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1524 | break; | |
1525 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
1526 | /* ERP strategy will escalate */ |
1527 | debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); | |
1528 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1529 | break; | |
1530 | default: | |
1531 | ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x " | |
1532 | "arrived.\n", | |
1533 | header->fsf_status_qual.word[0]); | |
1534 | break; | |
1535 | } | |
1536 | break; | |
1537 | ||
1538 | case FSF_ACCESS_DENIED: | |
1da177e4 LT |
1539 | ZFCP_LOG_NORMAL("access denied, cannot send generic service " |
1540 | "command (adapter %s, port d_id=0x%08x)\n", | |
1541 | zfcp_get_busid_by_port(port), port->d_id); | |
1542 | for (counter = 0; counter < 2; counter++) { | |
1543 | subtable = header->fsf_status_qual.halfword[counter * 2]; | |
1544 | rule = header->fsf_status_qual.halfword[counter * 2 + 1]; | |
1545 | switch (subtable) { | |
1546 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
1547 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
1548 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
1549 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
1550 | ZFCP_LOG_INFO("Access denied (%s rule %d)\n", | |
1551 | zfcp_act_subtable_type[subtable], rule); | |
1552 | break; | |
1553 | } | |
1554 | } | |
1555 | debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); | |
1556 | zfcp_erp_port_access_denied(port); | |
1557 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1558 | break; | |
1559 | ||
1560 | case FSF_GENERIC_COMMAND_REJECTED: | |
1da177e4 LT |
1561 | ZFCP_LOG_INFO("generic service command rejected " |
1562 | "(adapter %s, port d_id=0x%08x)\n", | |
1563 | zfcp_get_busid_by_port(port), port->d_id); | |
1564 | ZFCP_LOG_INFO("status qualifier:\n"); | |
1565 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, | |
1566 | (char *) &header->fsf_status_qual, | |
1567 | sizeof (union fsf_status_qual)); | |
1568 | debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej"); | |
1569 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1570 | break; | |
1571 | ||
1572 | case FSF_PORT_HANDLE_NOT_VALID: | |
1da177e4 LT |
1573 | ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port " |
1574 | "0x%016Lx on adapter %s invalid. This may " | |
1575 | "happen occasionally.\n", port->handle, | |
1576 | port->wwpn, zfcp_get_busid_by_port(port)); | |
1577 | ZFCP_LOG_INFO("status qualifier:\n"); | |
1578 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, | |
1579 | (char *) &header->fsf_status_qual, | |
1580 | sizeof (union fsf_status_qual)); | |
1581 | debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv"); | |
1582 | zfcp_erp_adapter_reopen(adapter, 0); | |
1583 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1584 | break; | |
1585 | ||
1586 | case FSF_PORT_BOXED: | |
1da177e4 LT |
1587 | ZFCP_LOG_INFO("port needs to be reopened " |
1588 | "(adapter %s, port d_id=0x%08x)\n", | |
1589 | zfcp_get_busid_by_port(port), port->d_id); | |
1590 | debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); | |
1591 | zfcp_erp_port_reopen(port, 0); | |
1592 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
1593 | | ZFCP_STATUS_FSFREQ_RETRY; | |
1594 | break; | |
1595 | ||
1596 | /* following states should never occure, all cases avoided | |
1597 | in zfcp_fsf_send_ct - but who knows ... */ | |
1598 | case FSF_PAYLOAD_SIZE_MISMATCH: | |
1da177e4 LT |
1599 | ZFCP_LOG_INFO("payload size mismatch (adapter: %s, " |
1600 | "req_buf_length=%d, resp_buf_length=%d)\n", | |
1601 | zfcp_get_busid_by_adapter(adapter), | |
1602 | bottom->req_buf_length, bottom->resp_buf_length); | |
1603 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1604 | break; | |
1605 | case FSF_REQUEST_SIZE_TOO_LARGE: | |
1da177e4 LT |
1606 | ZFCP_LOG_INFO("request size too large (adapter: %s, " |
1607 | "req_buf_length=%d)\n", | |
1608 | zfcp_get_busid_by_adapter(adapter), | |
1609 | bottom->req_buf_length); | |
1610 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1611 | break; | |
1612 | case FSF_RESPONSE_SIZE_TOO_LARGE: | |
1da177e4 LT |
1613 | ZFCP_LOG_INFO("response size too large (adapter: %s, " |
1614 | "resp_buf_length=%d)\n", | |
1615 | zfcp_get_busid_by_adapter(adapter), | |
1616 | bottom->resp_buf_length); | |
1617 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1618 | break; | |
1619 | case FSF_SBAL_MISMATCH: | |
1da177e4 LT |
1620 | ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " |
1621 | "resp_buf_length=%d)\n", | |
1622 | zfcp_get_busid_by_adapter(adapter), | |
1623 | bottom->req_buf_length, bottom->resp_buf_length); | |
1624 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1625 | break; | |
1626 | ||
1627 | default: | |
1628 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
1629 | "(debug info 0x%x)\n", header->fsf_status); | |
1630 | debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:"); | |
1631 | debug_exception(adapter->erp_dbf, 0, | |
1632 | &header->fsf_status_qual.word[0], sizeof (u32)); | |
1633 | break; | |
1634 | } | |
1635 | ||
1636 | skip_fsfstatus: | |
1637 | send_ct->status = retval; | |
1638 | ||
1639 | if (send_ct->handler != NULL) | |
1640 | send_ct->handler(send_ct->handler_data); | |
1641 | ||
1642 | return retval; | |
1643 | } | |
1644 | ||
1645 | /** | |
1646 | * zfcp_fsf_send_els - initiate an ELS command (FC-FS) | |
1647 | * @els: pointer to struct zfcp_send_els which contains all needed data for | |
1648 | * the command. | |
1649 | */ | |
1650 | int | |
1651 | zfcp_fsf_send_els(struct zfcp_send_els *els) | |
1652 | { | |
1653 | volatile struct qdio_buffer_element *sbale; | |
1654 | struct zfcp_fsf_req *fsf_req; | |
1655 | fc_id_t d_id; | |
1656 | struct zfcp_adapter *adapter; | |
1657 | unsigned long lock_flags; | |
1658 | int bytes; | |
1659 | int ret = 0; | |
1660 | ||
1661 | d_id = els->d_id; | |
1662 | adapter = els->adapter; | |
1663 | ||
1664 | ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, | |
1665 | ZFCP_REQ_AUTO_CLEANUP, | |
1666 | NULL, &lock_flags, &fsf_req); | |
1667 | if (ret < 0) { | |
1668 | ZFCP_LOG_INFO("error: creation of ELS request failed " | |
1669 | "(adapter %s, port d_id: 0x%08x)\n", | |
1670 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1671 | goto failed_req; | |
1672 | } | |
1673 | ||
1674 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
1675 | if (zfcp_use_one_sbal(els->req, els->req_count, | |
1676 | els->resp, els->resp_count)){ | |
1677 | /* both request buffer and response buffer | |
1678 | fit into one sbale each */ | |
1679 | sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; | |
1680 | sbale[2].addr = zfcp_sg_to_address(&els->req[0]); | |
1681 | sbale[2].length = els->req[0].length; | |
1682 | sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); | |
1683 | sbale[3].length = els->resp[0].length; | |
1684 | sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1685 | } else if (adapter->supported_features & | |
1686 | FSF_FEATURE_ELS_CT_CHAINED_SBALS) { | |
1687 | /* try to use chained SBALs */ | |
1688 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1689 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
1690 | els->req, els->req_count, | |
1691 | ZFCP_MAX_SBALS_PER_ELS_REQ); | |
1692 | if (bytes <= 0) { | |
1693 | ZFCP_LOG_INFO("error: creation of ELS request failed " | |
1694 | "(adapter %s, port d_id: 0x%08x)\n", | |
1695 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1696 | if (bytes == 0) { | |
1697 | ret = -ENOMEM; | |
1698 | } else { | |
1699 | ret = bytes; | |
1700 | } | |
1701 | goto failed_send; | |
1702 | } | |
1703 | fsf_req->qtcb->bottom.support.req_buf_length = bytes; | |
1704 | fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; | |
1705 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1706 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
1707 | els->resp, els->resp_count, | |
1708 | ZFCP_MAX_SBALS_PER_ELS_REQ); | |
1709 | if (bytes <= 0) { | |
1710 | ZFCP_LOG_INFO("error: creation of ELS request failed " | |
1711 | "(adapter %s, port d_id: 0x%08x)\n", | |
1712 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1713 | if (bytes == 0) { | |
1714 | ret = -ENOMEM; | |
1715 | } else { | |
1716 | ret = bytes; | |
1717 | } | |
1718 | goto failed_send; | |
1719 | } | |
1720 | fsf_req->qtcb->bottom.support.resp_buf_length = bytes; | |
1721 | } else { | |
1722 | /* reject request */ | |
1723 | ZFCP_LOG_INFO("error: microcode does not support chained SBALs" | |
1724 | ", ELS request too big (adapter %s, " | |
1725 | "port d_id: 0x%08x)\n", | |
1726 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1727 | ret = -EOPNOTSUPP; | |
1728 | goto failed_send; | |
1729 | } | |
1730 | ||
1731 | /* settings in QTCB */ | |
1732 | fsf_req->qtcb->bottom.support.d_id = d_id; | |
1733 | fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class; | |
1734 | fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; | |
1735 | fsf_req->data.send_els = els; | |
1736 | ||
1737 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
1738 | ||
1739 | /* start QDIO request for this FSF request */ | |
1740 | ret = zfcp_fsf_req_send(fsf_req, els->timer); | |
1741 | if (ret) { | |
1742 | ZFCP_LOG_DEBUG("error: initiation of ELS request failed " | |
1743 | "(adapter %s, port d_id: 0x%08x)\n", | |
1744 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1745 | goto failed_send; | |
1746 | } | |
1747 | ||
1748 | ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: " | |
1749 | "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id); | |
1750 | goto out; | |
1751 | ||
1752 | failed_send: | |
1753 | zfcp_fsf_req_free(fsf_req); | |
1754 | ||
1755 | failed_req: | |
1756 | out: | |
1757 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, | |
1758 | lock_flags); | |
1759 | ||
1760 | return ret; | |
1761 | } | |
1762 | ||
1763 | /** | |
1764 | * zfcp_fsf_send_els_handler - handler for ELS commands | |
1765 | * @fsf_req: pointer to struct zfcp_fsf_req | |
1766 | * | |
1767 | * Data specific for the ELS command is passed by | |
1768 | * fsf_req->data.send_els | |
1769 | * Usually a specific handler for the command is called via | |
1770 | * fsf_req->data.send_els->handler at end of this function. | |
1771 | */ | |
1772 | static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) | |
1773 | { | |
1774 | struct zfcp_adapter *adapter; | |
1775 | fc_id_t d_id; | |
1776 | struct zfcp_port *port; | |
1777 | struct fsf_qtcb_header *header; | |
1778 | struct fsf_qtcb_bottom_support *bottom; | |
1779 | struct zfcp_send_els *send_els; | |
1780 | int retval = -EINVAL; | |
1781 | u16 subtable, rule, counter; | |
1782 | ||
1783 | send_els = fsf_req->data.send_els; | |
1784 | adapter = send_els->adapter; | |
1785 | d_id = send_els->d_id; | |
1786 | header = &fsf_req->qtcb->header; | |
1787 | bottom = &fsf_req->qtcb->bottom.support; | |
1788 | ||
1789 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
1790 | goto skip_fsfstatus; | |
1791 | ||
1792 | switch (header->fsf_status) { | |
1793 | ||
1794 | case FSF_GOOD: | |
1da177e4 LT |
1795 | retval = 0; |
1796 | break; | |
1797 | ||
1798 | case FSF_SERVICE_CLASS_NOT_SUPPORTED: | |
1da177e4 LT |
1799 | if (adapter->fc_service_class <= 3) { |
1800 | ZFCP_LOG_INFO("error: adapter %s does " | |
1801 | "not support fibrechannel class %d.\n", | |
1802 | zfcp_get_busid_by_adapter(adapter), | |
1803 | adapter->fc_service_class); | |
1804 | } else { | |
1805 | ZFCP_LOG_INFO("bug: The fibrechannel class at " | |
1806 | "adapter %s is invalid. " | |
1807 | "(debug info %d)\n", | |
1808 | zfcp_get_busid_by_adapter(adapter), | |
1809 | adapter->fc_service_class); | |
1810 | } | |
1811 | /* stop operation for this adapter */ | |
1812 | debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup"); | |
1813 | zfcp_erp_adapter_shutdown(adapter, 0); | |
1814 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1815 | break; | |
1816 | ||
1817 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1818 | switch (header->fsf_status_qual.word[0]){ |
1819 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
1820 | debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest"); |
1821 | if (send_els->ls_code != ZFCP_LS_ADISC) { | |
1822 | read_lock(&zfcp_data.config_lock); | |
1823 | port = zfcp_get_port_by_did(adapter, d_id); | |
1824 | if (port) | |
1825 | zfcp_test_link(port); | |
1826 | read_unlock(&zfcp_data.config_lock); | |
1827 | } | |
1828 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1829 | break; | |
1830 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
1831 | debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp"); |
1832 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1833 | retval = | |
1834 | zfcp_handle_els_rjt(header->fsf_status_qual.word[1], | |
1835 | (struct zfcp_ls_rjt_par *) | |
1836 | &header->fsf_status_qual.word[2]); | |
1837 | break; | |
1838 | case FSF_SQ_RETRY_IF_POSSIBLE: | |
1da177e4 LT |
1839 | debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry"); |
1840 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1841 | break; | |
1842 | default: | |
1843 | ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n", | |
1844 | header->fsf_status_qual.word[0]); | |
1845 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO, | |
1846 | (char*)header->fsf_status_qual.word, 16); | |
1847 | } | |
1848 | break; | |
1849 | ||
1850 | case FSF_ELS_COMMAND_REJECTED: | |
1da177e4 LT |
1851 | ZFCP_LOG_INFO("ELS has been rejected because command filter " |
1852 | "prohibited sending " | |
1853 | "(adapter: %s, port d_id: 0x%08x)\n", | |
1854 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1855 | ||
1856 | break; | |
1857 | ||
1858 | case FSF_PAYLOAD_SIZE_MISMATCH: | |
1da177e4 LT |
1859 | ZFCP_LOG_INFO( |
1860 | "ELS request size and ELS response size must be either " | |
1861 | "both 0, or both greater than 0 " | |
1862 | "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n", | |
1863 | zfcp_get_busid_by_adapter(adapter), | |
1864 | bottom->req_buf_length, | |
1865 | bottom->resp_buf_length); | |
1866 | break; | |
1867 | ||
1868 | case FSF_REQUEST_SIZE_TOO_LARGE: | |
1da177e4 LT |
1869 | ZFCP_LOG_INFO( |
1870 | "Length of the ELS request buffer, " | |
1871 | "specified in QTCB bottom, " | |
1872 | "exceeds the size of the buffers " | |
1873 | "that have been allocated for ELS request data " | |
1874 | "(adapter: %s, req_buf_length=%d)\n", | |
1875 | zfcp_get_busid_by_adapter(adapter), | |
1876 | bottom->req_buf_length); | |
1877 | break; | |
1878 | ||
1879 | case FSF_RESPONSE_SIZE_TOO_LARGE: | |
1da177e4 LT |
1880 | ZFCP_LOG_INFO( |
1881 | "Length of the ELS response buffer, " | |
1882 | "specified in QTCB bottom, " | |
1883 | "exceeds the size of the buffers " | |
1884 | "that have been allocated for ELS response data " | |
1885 | "(adapter: %s, resp_buf_length=%d)\n", | |
1886 | zfcp_get_busid_by_adapter(adapter), | |
1887 | bottom->resp_buf_length); | |
1888 | break; | |
1889 | ||
1890 | case FSF_SBAL_MISMATCH: | |
1891 | /* should never occure, avoided in zfcp_fsf_send_els */ | |
1da177e4 LT |
1892 | ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, " |
1893 | "resp_buf_length=%d)\n", | |
1894 | zfcp_get_busid_by_adapter(adapter), | |
1895 | bottom->req_buf_length, bottom->resp_buf_length); | |
1896 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1897 | break; | |
1898 | ||
1899 | case FSF_ACCESS_DENIED: | |
1da177e4 LT |
1900 | ZFCP_LOG_NORMAL("access denied, cannot send ELS command " |
1901 | "(adapter %s, port d_id=0x%08x)\n", | |
1902 | zfcp_get_busid_by_adapter(adapter), d_id); | |
1903 | for (counter = 0; counter < 2; counter++) { | |
1904 | subtable = header->fsf_status_qual.halfword[counter * 2]; | |
1905 | rule = header->fsf_status_qual.halfword[counter * 2 + 1]; | |
1906 | switch (subtable) { | |
1907 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
1908 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
1909 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
1910 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
1911 | ZFCP_LOG_INFO("Access denied (%s rule %d)\n", | |
1912 | zfcp_act_subtable_type[subtable], rule); | |
1913 | break; | |
1914 | } | |
1915 | } | |
1916 | debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); | |
1917 | read_lock(&zfcp_data.config_lock); | |
1918 | port = zfcp_get_port_by_did(adapter, d_id); | |
1919 | if (port != NULL) | |
1920 | zfcp_erp_port_access_denied(port); | |
1921 | read_unlock(&zfcp_data.config_lock); | |
1922 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1923 | break; | |
1924 | ||
1925 | default: | |
1926 | ZFCP_LOG_NORMAL( | |
1927 | "bug: An unknown FSF Status was presented " | |
1928 | "(adapter: %s, fsf_status=0x%08x)\n", | |
1929 | zfcp_get_busid_by_adapter(adapter), | |
1930 | header->fsf_status); | |
1931 | debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval"); | |
1932 | debug_exception(adapter->erp_dbf, 0, | |
1933 | &header->fsf_status_qual.word[0], sizeof(u32)); | |
1934 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1935 | break; | |
1936 | } | |
1937 | ||
1938 | skip_fsfstatus: | |
1939 | send_els->status = retval; | |
1940 | ||
1941 | if (send_els->handler != 0) | |
1942 | send_els->handler(send_els->handler_data); | |
1943 | ||
1944 | return retval; | |
1945 | } | |
1946 | ||
1947 | /* | |
1948 | * function: | |
1949 | * | |
1950 | * purpose: | |
1951 | * | |
1952 | * returns: address of initiated FSF request | |
1953 | * NULL - request could not be initiated | |
1954 | */ | |
1955 | int | |
1956 | zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) | |
1957 | { | |
1958 | volatile struct qdio_buffer_element *sbale; | |
1959 | unsigned long lock_flags; | |
1960 | int retval = 0; | |
1961 | ||
1962 | /* setup new FSF request */ | |
1963 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
1964 | FSF_QTCB_EXCHANGE_CONFIG_DATA, | |
1965 | ZFCP_REQ_AUTO_CLEANUP, | |
1966 | erp_action->adapter->pool.fsf_req_erp, | |
1967 | &lock_flags, &(erp_action->fsf_req)); | |
1968 | if (retval < 0) { | |
1969 | ZFCP_LOG_INFO("error: Could not create exchange configuration " | |
1970 | "data request for adapter %s.\n", | |
1971 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
1972 | goto out; | |
1973 | } | |
1974 | ||
1975 | sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, | |
1976 | erp_action->fsf_req->sbal_curr, 0); | |
1977 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
1978 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1979 | ||
1980 | erp_action->fsf_req->erp_action = erp_action; | |
1981 | erp_action->fsf_req->qtcb->bottom.config.feature_selection = | |
1982 | (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING); | |
1983 | ||
1984 | /* start QDIO request for this FSF request */ | |
1985 | retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); | |
1986 | if (retval) { | |
1987 | ZFCP_LOG_INFO | |
1988 | ("error: Could not send exchange configuration data " | |
1989 | "command on the adapter %s\n", | |
1990 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
1991 | zfcp_fsf_req_free(erp_action->fsf_req); | |
1992 | erp_action->fsf_req = NULL; | |
1993 | goto out; | |
1994 | } | |
1995 | ||
1996 | ZFCP_LOG_DEBUG("exchange configuration data request initiated " | |
1997 | "(adapter %s)\n", | |
1998 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
1999 | ||
2000 | out: | |
2001 | write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, | |
2002 | lock_flags); | |
2003 | return retval; | |
2004 | } | |
2005 | ||
2006 | /** | |
2007 | * zfcp_fsf_exchange_config_evaluate | |
2008 | * @fsf_req: fsf_req which belongs to xchg config data request | |
2009 | * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) | |
2010 | * | |
2011 | * returns: -EIO on error, 0 otherwise | |
2012 | */ | |
2013 | static int | |
2014 | zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) | |
2015 | { | |
2016 | struct fsf_qtcb_bottom_config *bottom; | |
2017 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
2018 | ||
2019 | bottom = &fsf_req->qtcb->bottom.config; | |
2020 | ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n", | |
2021 | bottom->low_qtcb_version, bottom->high_qtcb_version); | |
2022 | adapter->fsf_lic_version = bottom->lic_version; | |
2023 | adapter->supported_features = bottom->supported_features; | |
6f71d9bc JB |
2024 | adapter->peer_wwpn = 0; |
2025 | adapter->peer_wwnn = 0; | |
2026 | adapter->peer_d_id = 0; | |
1da177e4 LT |
2027 | |
2028 | if (xchg_ok) { | |
2029 | adapter->wwnn = bottom->nport_serv_param.wwnn; | |
2030 | adapter->wwpn = bottom->nport_serv_param.wwpn; | |
2031 | adapter->s_id = bottom->s_id & ZFCP_DID_MASK; | |
2032 | adapter->fc_topology = bottom->fc_topology; | |
2033 | adapter->fc_link_speed = bottom->fc_link_speed; | |
2034 | adapter->hydra_version = bottom->adapter_type; | |
2035 | } else { | |
2036 | adapter->wwnn = 0; | |
2037 | adapter->wwpn = 0; | |
2038 | adapter->s_id = 0; | |
2039 | adapter->fc_topology = 0; | |
2040 | adapter->fc_link_speed = 0; | |
2041 | adapter->hydra_version = 0; | |
2042 | } | |
2043 | ||
6f71d9bc JB |
2044 | if (adapter->fc_topology == FSF_TOPO_P2P) { |
2045 | adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; | |
2046 | adapter->peer_wwpn = bottom->plogi_payload.wwpn; | |
2047 | adapter->peer_wwnn = bottom->plogi_payload.wwnn; | |
2048 | } | |
2049 | ||
1da177e4 LT |
2050 | if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){ |
2051 | adapter->hardware_version = bottom->hardware_version; | |
2052 | memcpy(adapter->serial_number, bottom->serial_number, 17); | |
2053 | EBCASC(adapter->serial_number, sizeof(adapter->serial_number)); | |
2054 | } | |
2055 | ||
6f71d9bc | 2056 | ZFCP_LOG_NORMAL("The adapter %s reported the following characteristics:\n" |
1da177e4 LT |
2057 | "WWNN 0x%016Lx, " |
2058 | "WWPN 0x%016Lx, " | |
2059 | "S_ID 0x%08x,\n" | |
2060 | "adapter version 0x%x, " | |
2061 | "LIC version 0x%x, " | |
2062 | "FC link speed %d Gb/s\n", | |
2063 | zfcp_get_busid_by_adapter(adapter), | |
2064 | adapter->wwnn, | |
2065 | adapter->wwpn, | |
2066 | (unsigned int) adapter->s_id, | |
2067 | adapter->hydra_version, | |
2068 | adapter->fsf_lic_version, | |
2069 | adapter->fc_link_speed); | |
2070 | if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { | |
2071 | ZFCP_LOG_NORMAL("error: the adapter %s " | |
2072 | "only supports newer control block " | |
2073 | "versions in comparison to this device " | |
2074 | "driver (try updated device driver)\n", | |
2075 | zfcp_get_busid_by_adapter(adapter)); | |
2076 | debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver"); | |
2077 | zfcp_erp_adapter_shutdown(adapter, 0); | |
2078 | return -EIO; | |
2079 | } | |
2080 | if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { | |
2081 | ZFCP_LOG_NORMAL("error: the adapter %s " | |
2082 | "only supports older control block " | |
2083 | "versions than this device driver uses" | |
2084 | "(consider a microcode upgrade)\n", | |
2085 | zfcp_get_busid_by_adapter(adapter)); | |
2086 | debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver"); | |
2087 | zfcp_erp_adapter_shutdown(adapter, 0); | |
2088 | return -EIO; | |
2089 | } | |
2090 | return 0; | |
2091 | } | |
2092 | ||
2093 | /* | |
2094 | * function: zfcp_fsf_exchange_config_data_handler | |
2095 | * | |
2096 | * purpose: is called for finished Exchange Configuration Data command | |
2097 | * | |
2098 | * returns: | |
2099 | */ | |
2100 | static int | |
2101 | zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) | |
2102 | { | |
2103 | struct fsf_qtcb_bottom_config *bottom; | |
2104 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
2105 | ||
2106 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
2107 | return -EIO; | |
2108 | ||
2109 | switch (fsf_req->qtcb->header.fsf_status) { | |
2110 | ||
2111 | case FSF_GOOD: | |
1da177e4 LT |
2112 | if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) |
2113 | return -EIO; | |
2114 | ||
2115 | switch (adapter->fc_topology) { | |
2116 | case FSF_TOPO_P2P: | |
6f71d9bc JB |
2117 | ZFCP_LOG_NORMAL("Point-to-Point fibrechannel " |
2118 | "configuration detected at adapter %s\n" | |
2119 | "Peer WWNN 0x%016llx, " | |
2120 | "peer WWPN 0x%016llx, " | |
2121 | "peer d_id 0x%06x\n", | |
2122 | zfcp_get_busid_by_adapter(adapter), | |
2123 | adapter->peer_wwnn, | |
2124 | adapter->peer_wwpn, | |
2125 | adapter->peer_d_id); | |
1da177e4 LT |
2126 | debug_text_event(fsf_req->adapter->erp_dbf, 0, |
2127 | "top-p-to-p"); | |
6f71d9bc | 2128 | break; |
1da177e4 | 2129 | case FSF_TOPO_AL: |
1da177e4 LT |
2130 | ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel " |
2131 | "topology detected at adapter %s " | |
2132 | "unsupported, shutting down adapter\n", | |
2133 | zfcp_get_busid_by_adapter(adapter)); | |
2134 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
2135 | "top-al"); | |
2136 | zfcp_erp_adapter_shutdown(adapter, 0); | |
2137 | return -EIO; | |
2138 | case FSF_TOPO_FABRIC: | |
1da177e4 LT |
2139 | ZFCP_LOG_INFO("Switched fabric fibrechannel " |
2140 | "network detected at adapter %s.\n", | |
2141 | zfcp_get_busid_by_adapter(adapter)); | |
2142 | break; | |
2143 | default: | |
2144 | ZFCP_LOG_NORMAL("bug: The fibrechannel topology " | |
2145 | "reported by the exchange " | |
2146 | "configuration command for " | |
2147 | "the adapter %s is not " | |
2148 | "of a type known to the zfcp " | |
2149 | "driver, shutting down adapter\n", | |
2150 | zfcp_get_busid_by_adapter(adapter)); | |
6f71d9bc | 2151 | adapter->fc_topology = FSF_TOPO_ERROR; |
1da177e4 LT |
2152 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, |
2153 | "unknown-topo"); | |
2154 | zfcp_erp_adapter_shutdown(adapter, 0); | |
2155 | return -EIO; | |
2156 | } | |
2157 | bottom = &fsf_req->qtcb->bottom.config; | |
2158 | if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { | |
2159 | ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) " | |
2160 | "allowed by the adapter %s " | |
2161 | "is lower than the minimum " | |
2162 | "required by the driver (%ld bytes).\n", | |
2163 | bottom->max_qtcb_size, | |
2164 | zfcp_get_busid_by_adapter(adapter), | |
2165 | sizeof(struct fsf_qtcb)); | |
2166 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
2167 | "qtcb-size"); | |
2168 | debug_event(fsf_req->adapter->erp_dbf, 0, | |
2169 | &bottom->max_qtcb_size, sizeof (u32)); | |
2170 | zfcp_erp_adapter_shutdown(adapter, 0); | |
2171 | return -EIO; | |
2172 | } | |
2173 | atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, | |
2174 | &adapter->status); | |
2175 | break; | |
2176 | case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: | |
2177 | debug_text_event(adapter->erp_dbf, 0, "xchg-inco"); | |
2178 | ||
2179 | if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) | |
2180 | return -EIO; | |
2181 | ||
2182 | ZFCP_LOG_INFO("Local link to adapter %s is down\n", | |
2183 | zfcp_get_busid_by_adapter(adapter)); | |
2184 | atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | | |
2185 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, | |
2186 | &adapter->status); | |
2187 | zfcp_erp_adapter_failed(adapter); | |
2188 | break; | |
2189 | default: | |
2190 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng"); | |
2191 | debug_event(fsf_req->adapter->erp_dbf, 0, | |
2192 | &fsf_req->qtcb->header.fsf_status, sizeof (u32)); | |
2193 | zfcp_erp_adapter_shutdown(adapter, 0); | |
2194 | return -EIO; | |
2195 | } | |
2196 | return 0; | |
2197 | } | |
2198 | ||
2199 | /** | |
2200 | * zfcp_fsf_exchange_port_data - request information about local port | |
2201 | * @adapter: for which port data is requested | |
2202 | * @data: response to exchange port data request | |
2203 | */ | |
2204 | int | |
2205 | zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter, | |
2206 | struct fsf_qtcb_bottom_port *data) | |
2207 | { | |
2208 | volatile struct qdio_buffer_element *sbale; | |
2209 | int retval = 0; | |
2210 | unsigned long lock_flags; | |
2211 | struct zfcp_fsf_req *fsf_req; | |
2212 | struct timer_list *timer; | |
2213 | ||
2214 | if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){ | |
2215 | ZFCP_LOG_INFO("error: exchange port data " | |
2216 | "command not supported by adapter %s\n", | |
2217 | zfcp_get_busid_by_adapter(adapter)); | |
2218 | return -EOPNOTSUPP; | |
2219 | } | |
2220 | ||
2221 | timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); | |
2222 | if (!timer) | |
2223 | return -ENOMEM; | |
2224 | ||
2225 | /* setup new FSF request */ | |
2226 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, | |
2227 | 0, 0, &lock_flags, &fsf_req); | |
2228 | if (retval < 0) { | |
2229 | ZFCP_LOG_INFO("error: Out of resources. Could not create an " | |
2230 | "exchange port data request for" | |
2231 | "the adapter %s.\n", | |
2232 | zfcp_get_busid_by_adapter(adapter)); | |
2233 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, | |
2234 | lock_flags); | |
2235 | goto out; | |
2236 | } | |
2237 | ||
2238 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
2239 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
2240 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2241 | ||
2242 | fsf_req->data.port_data = data; | |
2243 | ||
2244 | init_timer(timer); | |
2245 | timer->function = zfcp_fsf_request_timeout_handler; | |
2246 | timer->data = (unsigned long) adapter; | |
2247 | timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; | |
2248 | ||
2249 | retval = zfcp_fsf_req_send(fsf_req, timer); | |
2250 | if (retval) { | |
2251 | ZFCP_LOG_INFO("error: Could not send an exchange port data " | |
2252 | "command on the adapter %s\n", | |
2253 | zfcp_get_busid_by_adapter(adapter)); | |
2254 | zfcp_fsf_req_free(fsf_req); | |
2255 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, | |
2256 | lock_flags); | |
2257 | goto out; | |
2258 | } | |
2259 | ||
2260 | ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n", | |
2261 | zfcp_get_busid_by_adapter(adapter)); | |
2262 | ||
2263 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, | |
2264 | lock_flags); | |
2265 | ||
2266 | wait_event(fsf_req->completion_wq, | |
2267 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
2268 | del_timer_sync(timer); | |
2269 | zfcp_fsf_req_cleanup(fsf_req); | |
2270 | out: | |
2271 | kfree(timer); | |
2272 | return retval; | |
2273 | } | |
2274 | ||
2275 | ||
2276 | /** | |
2277 | * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request | |
2278 | * @fsf_req: pointer to struct zfcp_fsf_req | |
2279 | */ | |
2280 | static void | |
2281 | zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) | |
2282 | { | |
2283 | struct fsf_qtcb_bottom_port *bottom; | |
2284 | struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data; | |
2285 | ||
2286 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
2287 | return; | |
2288 | ||
2289 | switch (fsf_req->qtcb->header.fsf_status) { | |
2290 | case FSF_GOOD: | |
1da177e4 LT |
2291 | bottom = &fsf_req->qtcb->bottom.port; |
2292 | memcpy(data, bottom, sizeof(*data)); | |
2293 | break; | |
2294 | ||
2295 | default: | |
2296 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng"); | |
2297 | debug_event(fsf_req->adapter->erp_dbf, 0, | |
2298 | &fsf_req->qtcb->header.fsf_status, sizeof(u32)); | |
2299 | } | |
2300 | } | |
2301 | ||
2302 | ||
2303 | /* | |
2304 | * function: zfcp_fsf_open_port | |
2305 | * | |
2306 | * purpose: | |
2307 | * | |
2308 | * returns: address of initiated FSF request | |
2309 | * NULL - request could not be initiated | |
2310 | */ | |
2311 | int | |
2312 | zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) | |
2313 | { | |
2314 | volatile struct qdio_buffer_element *sbale; | |
2315 | unsigned long lock_flags; | |
2316 | int retval = 0; | |
2317 | ||
2318 | /* setup new FSF request */ | |
2319 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2320 | FSF_QTCB_OPEN_PORT_WITH_DID, | |
2321 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2322 | erp_action->adapter->pool.fsf_req_erp, | |
2323 | &lock_flags, &(erp_action->fsf_req)); | |
2324 | if (retval < 0) { | |
2325 | ZFCP_LOG_INFO("error: Could not create open port request " | |
2326 | "for port 0x%016Lx on adapter %s.\n", | |
2327 | erp_action->port->wwpn, | |
2328 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
2329 | goto out; | |
2330 | } | |
2331 | ||
2332 | sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, | |
2333 | erp_action->fsf_req->sbal_curr, 0); | |
2334 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
2335 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2336 | ||
2337 | erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; | |
2338 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); | |
2339 | erp_action->fsf_req->data.open_port.port = erp_action->port; | |
2340 | erp_action->fsf_req->erp_action = erp_action; | |
2341 | ||
2342 | /* start QDIO request for this FSF request */ | |
2343 | retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); | |
2344 | if (retval) { | |
2345 | ZFCP_LOG_INFO("error: Could not send open port request for " | |
2346 | "port 0x%016Lx on adapter %s.\n", | |
2347 | erp_action->port->wwpn, | |
2348 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
2349 | zfcp_fsf_req_free(erp_action->fsf_req); | |
2350 | erp_action->fsf_req = NULL; | |
2351 | goto out; | |
2352 | } | |
2353 | ||
2354 | ZFCP_LOG_DEBUG("open port request initiated " | |
2355 | "(adapter %s, port 0x%016Lx)\n", | |
2356 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2357 | erp_action->port->wwpn); | |
2358 | out: | |
2359 | write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, | |
2360 | lock_flags); | |
2361 | return retval; | |
2362 | } | |
2363 | ||
2364 | /* | |
2365 | * function: zfcp_fsf_open_port_handler | |
2366 | * | |
2367 | * purpose: is called for finished Open Port command | |
2368 | * | |
2369 | * returns: | |
2370 | */ | |
2371 | static int | |
2372 | zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) | |
2373 | { | |
2374 | int retval = -EINVAL; | |
2375 | struct zfcp_port *port; | |
2376 | struct fsf_plogi *plogi; | |
2377 | struct fsf_qtcb_header *header; | |
2378 | u16 subtable, rule, counter; | |
2379 | ||
2380 | port = fsf_req->data.open_port.port; | |
2381 | header = &fsf_req->qtcb->header; | |
2382 | ||
2383 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2384 | /* don't change port status in our bookkeeping */ | |
2385 | goto skip_fsfstatus; | |
2386 | } | |
2387 | ||
2388 | /* evaluate FSF status in QTCB */ | |
2389 | switch (header->fsf_status) { | |
2390 | ||
2391 | case FSF_PORT_ALREADY_OPEN: | |
1da177e4 LT |
2392 | ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s " |
2393 | "is already open.\n", | |
2394 | port->wwpn, zfcp_get_busid_by_port(port)); | |
2395 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, | |
2396 | "fsf_s_popen"); | |
2397 | /* | |
2398 | * This is a bug, however operation should continue normally | |
2399 | * if it is simply ignored | |
2400 | */ | |
2401 | break; | |
2402 | ||
2403 | case FSF_ACCESS_DENIED: | |
1da177e4 LT |
2404 | ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx " |
2405 | "on adapter %s\n", | |
2406 | port->wwpn, zfcp_get_busid_by_port(port)); | |
2407 | for (counter = 0; counter < 2; counter++) { | |
2408 | subtable = header->fsf_status_qual.halfword[counter * 2]; | |
2409 | rule = header->fsf_status_qual.halfword[counter * 2 + 1]; | |
2410 | switch (subtable) { | |
2411 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
2412 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
2413 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
2414 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
2415 | ZFCP_LOG_INFO("Access denied (%s rule %d)\n", | |
2416 | zfcp_act_subtable_type[subtable], rule); | |
2417 | break; | |
2418 | } | |
2419 | } | |
2420 | debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); | |
2421 | zfcp_erp_port_access_denied(port); | |
2422 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2423 | break; | |
2424 | ||
2425 | case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: | |
1da177e4 LT |
2426 | ZFCP_LOG_INFO("error: The FSF adapter is out of resources. " |
2427 | "The remote port 0x%016Lx on adapter %s " | |
2428 | "could not be opened. Disabling it.\n", | |
2429 | port->wwpn, zfcp_get_busid_by_port(port)); | |
2430 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
2431 | "fsf_s_max_ports"); | |
2432 | zfcp_erp_port_failed(port); | |
2433 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2434 | break; | |
2435 | ||
2436 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2437 | switch (header->fsf_status_qual.word[0]) { |
2438 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
2439 | debug_text_event(fsf_req->adapter->erp_dbf, 1, |
2440 | "fsf_sq_ltest"); | |
2441 | /* ERP strategy will escalate */ | |
2442 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2443 | break; | |
2444 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
2445 | /* ERP strategy will escalate */ | |
2446 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
2447 | "fsf_sq_ulp"); | |
2448 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2449 | break; | |
2450 | case FSF_SQ_NO_RETRY_POSSIBLE: | |
1da177e4 LT |
2451 | ZFCP_LOG_NORMAL("The remote port 0x%016Lx on " |
2452 | "adapter %s could not be opened. " | |
2453 | "Disabling it.\n", | |
2454 | port->wwpn, | |
2455 | zfcp_get_busid_by_port(port)); | |
2456 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, | |
2457 | "fsf_sq_no_retry"); | |
2458 | zfcp_erp_port_failed(port); | |
2459 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2460 | break; | |
2461 | default: | |
2462 | ZFCP_LOG_NORMAL | |
2463 | ("bug: Wrong status qualifier 0x%x arrived.\n", | |
2464 | header->fsf_status_qual.word[0]); | |
2465 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
2466 | "fsf_sq_inval:"); | |
2467 | debug_exception( | |
2468 | fsf_req->adapter->erp_dbf, 0, | |
2469 | &header->fsf_status_qual.word[0], | |
2470 | sizeof (u32)); | |
2471 | break; | |
2472 | } | |
2473 | break; | |
2474 | ||
2475 | case FSF_GOOD: | |
1da177e4 LT |
2476 | /* save port handle assigned by FSF */ |
2477 | port->handle = header->port_handle; | |
2478 | ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s " | |
2479 | "was opened, it's port handle is 0x%x\n", | |
2480 | port->wwpn, zfcp_get_busid_by_port(port), | |
2481 | port->handle); | |
2482 | /* mark port as open */ | |
2483 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | | |
2484 | ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); | |
2485 | retval = 0; | |
2486 | /* check whether D_ID has changed during open */ | |
2487 | /* | |
2488 | * FIXME: This check is not airtight, as the FCP channel does | |
2489 | * not monitor closures of target port connections caused on | |
2490 | * the remote side. Thus, they might miss out on invalidating | |
2491 | * locally cached WWPNs (and other N_Port parameters) of gone | |
2492 | * target ports. So, our heroic attempt to make things safe | |
2493 | * could be undermined by 'open port' response data tagged with | |
2494 | * obsolete WWPNs. Another reason to monitor potential | |
2495 | * connection closures ourself at least (by interpreting | |
2496 | * incoming ELS' and unsolicited status). It just crosses my | |
2497 | * mind that one should be able to cross-check by means of | |
2498 | * another GID_PN straight after a port has been opened. | |
2499 | * Alternately, an ADISC/PDISC ELS should suffice, as well. | |
2500 | */ | |
2501 | plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; | |
2502 | if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) | |
2503 | { | |
2504 | if (fsf_req->qtcb->bottom.support.els1_length < | |
2505 | ((((unsigned long) &plogi->serv_param.wwpn) - | |
2506 | ((unsigned long) plogi)) + sizeof (u64))) { | |
2507 | ZFCP_LOG_INFO( | |
2508 | "warning: insufficient length of " | |
2509 | "PLOGI payload (%i)\n", | |
2510 | fsf_req->qtcb->bottom.support.els1_length); | |
2511 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
2512 | "fsf_s_short_plogi:"); | |
2513 | /* skip sanity check and assume wwpn is ok */ | |
2514 | } else { | |
2515 | if (plogi->serv_param.wwpn != port->wwpn) { | |
2516 | ZFCP_LOG_INFO("warning: d_id of port " | |
2517 | "0x%016Lx changed during " | |
2518 | "open\n", port->wwpn); | |
2519 | debug_text_event( | |
2520 | fsf_req->adapter->erp_dbf, 0, | |
2521 | "fsf_s_did_change:"); | |
2522 | atomic_clear_mask( | |
2523 | ZFCP_STATUS_PORT_DID_DID, | |
2524 | &port->status); | |
2525 | } else | |
2526 | port->wwnn = plogi->serv_param.wwnn; | |
2527 | } | |
2528 | } | |
2529 | break; | |
2530 | ||
2531 | case FSF_UNKNOWN_OP_SUBTYPE: | |
2532 | /* should never occure, subtype not set in zfcp_fsf_open_port */ | |
1da177e4 LT |
2533 | ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, " |
2534 | "op_subtype=0x%x)\n", | |
2535 | zfcp_get_busid_by_port(port), | |
2536 | fsf_req->qtcb->bottom.support.operation_subtype); | |
2537 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2538 | break; | |
2539 | ||
2540 | default: | |
2541 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
2542 | "(debug info 0x%x)\n", | |
2543 | header->fsf_status); | |
2544 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); | |
2545 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
2546 | &header->fsf_status, sizeof (u32)); | |
2547 | break; | |
2548 | } | |
2549 | ||
2550 | skip_fsfstatus: | |
2551 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); | |
2552 | return retval; | |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | * function: zfcp_fsf_close_port | |
2557 | * | |
2558 | * purpose: submit FSF command "close port" | |
2559 | * | |
2560 | * returns: address of initiated FSF request | |
2561 | * NULL - request could not be initiated | |
2562 | */ | |
2563 | int | |
2564 | zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) | |
2565 | { | |
2566 | volatile struct qdio_buffer_element *sbale; | |
2567 | unsigned long lock_flags; | |
2568 | int retval = 0; | |
2569 | ||
2570 | /* setup new FSF request */ | |
2571 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2572 | FSF_QTCB_CLOSE_PORT, | |
2573 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2574 | erp_action->adapter->pool.fsf_req_erp, | |
2575 | &lock_flags, &(erp_action->fsf_req)); | |
2576 | if (retval < 0) { | |
2577 | ZFCP_LOG_INFO("error: Could not create a close port request " | |
2578 | "for port 0x%016Lx on adapter %s.\n", | |
2579 | erp_action->port->wwpn, | |
2580 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
2581 | goto out; | |
2582 | } | |
2583 | ||
2584 | sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, | |
2585 | erp_action->fsf_req->sbal_curr, 0); | |
2586 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
2587 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2588 | ||
2589 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); | |
2590 | erp_action->fsf_req->data.close_port.port = erp_action->port; | |
2591 | erp_action->fsf_req->erp_action = erp_action; | |
2592 | erp_action->fsf_req->qtcb->header.port_handle = | |
2593 | erp_action->port->handle; | |
2594 | ||
2595 | /* start QDIO request for this FSF request */ | |
2596 | retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); | |
2597 | if (retval) { | |
2598 | ZFCP_LOG_INFO("error: Could not send a close port request for " | |
2599 | "port 0x%016Lx on adapter %s.\n", | |
2600 | erp_action->port->wwpn, | |
2601 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
2602 | zfcp_fsf_req_free(erp_action->fsf_req); | |
2603 | erp_action->fsf_req = NULL; | |
2604 | goto out; | |
2605 | } | |
2606 | ||
2607 | ZFCP_LOG_TRACE("close port request initiated " | |
2608 | "(adapter %s, port 0x%016Lx)\n", | |
2609 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2610 | erp_action->port->wwpn); | |
2611 | out: | |
2612 | write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, | |
2613 | lock_flags); | |
2614 | return retval; | |
2615 | } | |
2616 | ||
2617 | /* | |
2618 | * function: zfcp_fsf_close_port_handler | |
2619 | * | |
2620 | * purpose: is called for finished Close Port FSF command | |
2621 | * | |
2622 | * returns: | |
2623 | */ | |
2624 | static int | |
2625 | zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) | |
2626 | { | |
2627 | int retval = -EINVAL; | |
2628 | struct zfcp_port *port; | |
2629 | ||
2630 | port = fsf_req->data.close_port.port; | |
2631 | ||
2632 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2633 | /* don't change port status in our bookkeeping */ | |
2634 | goto skip_fsfstatus; | |
2635 | } | |
2636 | ||
2637 | /* evaluate FSF status in QTCB */ | |
2638 | switch (fsf_req->qtcb->header.fsf_status) { | |
2639 | ||
2640 | case FSF_PORT_HANDLE_NOT_VALID: | |
1da177e4 LT |
2641 | ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " |
2642 | "0x%016Lx on adapter %s invalid. This may happen " | |
2643 | "occasionally.\n", port->handle, | |
2644 | port->wwpn, zfcp_get_busid_by_port(port)); | |
2645 | ZFCP_LOG_DEBUG("status qualifier:\n"); | |
2646 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
2647 | (char *) &fsf_req->qtcb->header.fsf_status_qual, | |
2648 | sizeof (union fsf_status_qual)); | |
2649 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
2650 | "fsf_s_phand_nv"); | |
2651 | zfcp_erp_adapter_reopen(port->adapter, 0); | |
2652 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2653 | break; | |
2654 | ||
2655 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2656 | /* Note: FSF has actually closed the port in this case. |
2657 | * The status code is just daft. Fingers crossed for a change | |
2658 | */ | |
2659 | retval = 0; | |
2660 | break; | |
2661 | ||
2662 | case FSF_GOOD: | |
1da177e4 LT |
2663 | ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, " |
2664 | "port handle 0x%x\n", port->wwpn, | |
2665 | zfcp_get_busid_by_port(port), port->handle); | |
2666 | zfcp_erp_modify_port_status(port, | |
2667 | ZFCP_STATUS_COMMON_OPEN, | |
2668 | ZFCP_CLEAR); | |
2669 | retval = 0; | |
2670 | break; | |
2671 | ||
2672 | default: | |
2673 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
2674 | "(debug info 0x%x)\n", | |
2675 | fsf_req->qtcb->header.fsf_status); | |
2676 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); | |
2677 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
2678 | &fsf_req->qtcb->header.fsf_status, | |
2679 | sizeof (u32)); | |
2680 | break; | |
2681 | } | |
2682 | ||
2683 | skip_fsfstatus: | |
2684 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); | |
2685 | return retval; | |
2686 | } | |
2687 | ||
2688 | /* | |
2689 | * function: zfcp_fsf_close_physical_port | |
2690 | * | |
2691 | * purpose: submit FSF command "close physical port" | |
2692 | * | |
2693 | * returns: address of initiated FSF request | |
2694 | * NULL - request could not be initiated | |
2695 | */ | |
2696 | int | |
2697 | zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) | |
2698 | { | |
2699 | int retval = 0; | |
2700 | unsigned long lock_flags; | |
2701 | volatile struct qdio_buffer_element *sbale; | |
2702 | ||
2703 | /* setup new FSF request */ | |
2704 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2705 | FSF_QTCB_CLOSE_PHYSICAL_PORT, | |
2706 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2707 | erp_action->adapter->pool.fsf_req_erp, | |
2708 | &lock_flags, &erp_action->fsf_req); | |
2709 | if (retval < 0) { | |
2710 | ZFCP_LOG_INFO("error: Could not create close physical port " | |
2711 | "request (adapter %s, port 0x%016Lx)\n", | |
2712 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2713 | erp_action->port->wwpn); | |
2714 | ||
2715 | goto out; | |
2716 | } | |
2717 | ||
2718 | sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, | |
2719 | erp_action->fsf_req->sbal_curr, 0); | |
2720 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
2721 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2722 | ||
2723 | /* mark port as being closed */ | |
2724 | atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, | |
2725 | &erp_action->port->status); | |
2726 | /* save a pointer to this port */ | |
2727 | erp_action->fsf_req->data.close_physical_port.port = erp_action->port; | |
2728 | /* port to be closeed */ | |
2729 | erp_action->fsf_req->qtcb->header.port_handle = | |
2730 | erp_action->port->handle; | |
2731 | erp_action->fsf_req->erp_action = erp_action; | |
2732 | ||
2733 | /* start QDIO request for this FSF request */ | |
2734 | retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); | |
2735 | if (retval) { | |
2736 | ZFCP_LOG_INFO("error: Could not send close physical port " | |
2737 | "request (adapter %s, port 0x%016Lx)\n", | |
2738 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2739 | erp_action->port->wwpn); | |
2740 | zfcp_fsf_req_free(erp_action->fsf_req); | |
2741 | erp_action->fsf_req = NULL; | |
2742 | goto out; | |
2743 | } | |
2744 | ||
2745 | ZFCP_LOG_TRACE("close physical port request initiated " | |
2746 | "(adapter %s, port 0x%016Lx)\n", | |
2747 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2748 | erp_action->port->wwpn); | |
2749 | out: | |
2750 | write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, | |
2751 | lock_flags); | |
2752 | return retval; | |
2753 | } | |
2754 | ||
2755 | /* | |
2756 | * function: zfcp_fsf_close_physical_port_handler | |
2757 | * | |
2758 | * purpose: is called for finished Close Physical Port FSF command | |
2759 | * | |
2760 | * returns: | |
2761 | */ | |
2762 | static int | |
2763 | zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) | |
2764 | { | |
2765 | int retval = -EINVAL; | |
2766 | struct zfcp_port *port; | |
2767 | struct zfcp_unit *unit; | |
2768 | struct fsf_qtcb_header *header; | |
2769 | u16 subtable, rule, counter; | |
2770 | ||
2771 | port = fsf_req->data.close_physical_port.port; | |
2772 | header = &fsf_req->qtcb->header; | |
2773 | ||
2774 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2775 | /* don't change port status in our bookkeeping */ | |
2776 | goto skip_fsfstatus; | |
2777 | } | |
2778 | ||
2779 | /* evaluate FSF status in QTCB */ | |
2780 | switch (header->fsf_status) { | |
2781 | ||
2782 | case FSF_PORT_HANDLE_NOT_VALID: | |
1da177e4 LT |
2783 | ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid" |
2784 | "(adapter %s, port 0x%016Lx). " | |
2785 | "This may happen occasionally.\n", | |
2786 | port->handle, | |
2787 | zfcp_get_busid_by_port(port), | |
2788 | port->wwpn); | |
2789 | ZFCP_LOG_DEBUG("status qualifier:\n"); | |
2790 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
2791 | (char *) &header->fsf_status_qual, | |
2792 | sizeof (union fsf_status_qual)); | |
2793 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
2794 | "fsf_s_phand_nv"); | |
2795 | zfcp_erp_adapter_reopen(port->adapter, 0); | |
2796 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2797 | break; | |
2798 | ||
2799 | case FSF_ACCESS_DENIED: | |
1da177e4 LT |
2800 | ZFCP_LOG_NORMAL("Access denied, cannot close " |
2801 | "physical port 0x%016Lx on adapter %s\n", | |
2802 | port->wwpn, zfcp_get_busid_by_port(port)); | |
2803 | for (counter = 0; counter < 2; counter++) { | |
2804 | subtable = header->fsf_status_qual.halfword[counter * 2]; | |
2805 | rule = header->fsf_status_qual.halfword[counter * 2 + 1]; | |
2806 | switch (subtable) { | |
2807 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
2808 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
2809 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
2810 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
2811 | ZFCP_LOG_INFO("Access denied (%s rule %d)\n", | |
2812 | zfcp_act_subtable_type[subtable], rule); | |
2813 | break; | |
2814 | } | |
2815 | } | |
2816 | debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); | |
2817 | zfcp_erp_port_access_denied(port); | |
2818 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2819 | break; | |
2820 | ||
2821 | case FSF_PORT_BOXED: | |
1da177e4 LT |
2822 | ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter " |
2823 | "%s needs to be reopened but it was attempted " | |
2824 | "to close it physically.\n", | |
2825 | port->wwpn, | |
2826 | zfcp_get_busid_by_port(port)); | |
2827 | debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed"); | |
2828 | zfcp_erp_port_reopen(port, 0); | |
2829 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | | |
2830 | ZFCP_STATUS_FSFREQ_RETRY; | |
2831 | break; | |
2832 | ||
2833 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2834 | switch (header->fsf_status_qual.word[0]) { |
2835 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
2836 | debug_text_event(fsf_req->adapter->erp_dbf, 1, |
2837 | "fsf_sq_ltest"); | |
2838 | /* This will now be escalated by ERP */ | |
2839 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2840 | break; | |
2841 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
2842 | /* ERP strategy will escalate */ |
2843 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
2844 | "fsf_sq_ulp"); | |
2845 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2846 | break; | |
2847 | default: | |
2848 | ZFCP_LOG_NORMAL | |
2849 | ("bug: Wrong status qualifier 0x%x arrived.\n", | |
2850 | header->fsf_status_qual.word[0]); | |
2851 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
2852 | "fsf_sq_inval:"); | |
2853 | debug_exception( | |
2854 | fsf_req->adapter->erp_dbf, 0, | |
2855 | &header->fsf_status_qual.word[0], sizeof (u32)); | |
2856 | break; | |
2857 | } | |
2858 | break; | |
2859 | ||
2860 | case FSF_GOOD: | |
1da177e4 LT |
2861 | ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s " |
2862 | "physically closed, port handle 0x%x\n", | |
2863 | port->wwpn, | |
2864 | zfcp_get_busid_by_port(port), port->handle); | |
2865 | /* can't use generic zfcp_erp_modify_port_status because | |
2866 | * ZFCP_STATUS_COMMON_OPEN must not be reset for the port | |
2867 | */ | |
2868 | atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); | |
2869 | list_for_each_entry(unit, &port->unit_list_head, list) | |
2870 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); | |
2871 | retval = 0; | |
2872 | break; | |
2873 | ||
2874 | default: | |
2875 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
2876 | "(debug info 0x%x)\n", | |
2877 | header->fsf_status); | |
2878 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); | |
2879 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
2880 | &header->fsf_status, sizeof (u32)); | |
2881 | break; | |
2882 | } | |
2883 | ||
2884 | skip_fsfstatus: | |
2885 | atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); | |
2886 | return retval; | |
2887 | } | |
2888 | ||
2889 | /* | |
2890 | * function: zfcp_fsf_open_unit | |
2891 | * | |
2892 | * purpose: | |
2893 | * | |
2894 | * returns: | |
2895 | * | |
2896 | * assumptions: This routine does not check whether the associated | |
2897 | * remote port has already been opened. This should be | |
2898 | * done by calling routines. Otherwise some status | |
2899 | * may be presented by FSF | |
2900 | */ | |
2901 | int | |
2902 | zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) | |
2903 | { | |
2904 | volatile struct qdio_buffer_element *sbale; | |
2905 | unsigned long lock_flags; | |
2906 | int retval = 0; | |
2907 | ||
2908 | /* setup new FSF request */ | |
2909 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2910 | FSF_QTCB_OPEN_LUN, | |
2911 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2912 | erp_action->adapter->pool.fsf_req_erp, | |
2913 | &lock_flags, &(erp_action->fsf_req)); | |
2914 | if (retval < 0) { | |
2915 | ZFCP_LOG_INFO("error: Could not create open unit request for " | |
2916 | "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", | |
2917 | erp_action->unit->fcp_lun, | |
2918 | erp_action->unit->port->wwpn, | |
2919 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
2920 | goto out; | |
2921 | } | |
2922 | ||
2923 | sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, | |
2924 | erp_action->fsf_req->sbal_curr, 0); | |
2925 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
2926 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2927 | ||
2928 | erp_action->fsf_req->qtcb->header.port_handle = | |
2929 | erp_action->port->handle; | |
2930 | erp_action->fsf_req->qtcb->bottom.support.fcp_lun = | |
2931 | erp_action->unit->fcp_lun; | |
2932 | erp_action->fsf_req->qtcb->bottom.support.option = | |
2933 | FSF_OPEN_LUN_SUPPRESS_BOXING; | |
2934 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); | |
2935 | erp_action->fsf_req->data.open_unit.unit = erp_action->unit; | |
2936 | erp_action->fsf_req->erp_action = erp_action; | |
2937 | ||
2938 | /* start QDIO request for this FSF request */ | |
2939 | retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); | |
2940 | if (retval) { | |
2941 | ZFCP_LOG_INFO("error: Could not send an open unit request " | |
2942 | "on the adapter %s, port 0x%016Lx for " | |
2943 | "unit 0x%016Lx\n", | |
2944 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2945 | erp_action->port->wwpn, | |
2946 | erp_action->unit->fcp_lun); | |
2947 | zfcp_fsf_req_free(erp_action->fsf_req); | |
2948 | erp_action->fsf_req = NULL; | |
2949 | goto out; | |
2950 | } | |
2951 | ||
2952 | ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, " | |
2953 | "port 0x%016Lx, unit 0x%016Lx)\n", | |
2954 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
2955 | erp_action->port->wwpn, erp_action->unit->fcp_lun); | |
2956 | out: | |
2957 | write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, | |
2958 | lock_flags); | |
2959 | return retval; | |
2960 | } | |
2961 | ||
2962 | /* | |
2963 | * function: zfcp_fsf_open_unit_handler | |
2964 | * | |
2965 | * purpose: is called for finished Open LUN command | |
2966 | * | |
2967 | * returns: | |
2968 | */ | |
2969 | static int | |
2970 | zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) | |
2971 | { | |
2972 | int retval = -EINVAL; | |
2973 | struct zfcp_adapter *adapter; | |
2974 | struct zfcp_unit *unit; | |
2975 | struct fsf_qtcb_header *header; | |
2976 | struct fsf_qtcb_bottom_support *bottom; | |
2977 | struct fsf_queue_designator *queue_designator; | |
2978 | u16 subtable, rule, counter; | |
2979 | u32 allowed, exclusive, readwrite; | |
2980 | ||
2981 | unit = fsf_req->data.open_unit.unit; | |
2982 | ||
2983 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2984 | /* don't change unit status in our bookkeeping */ | |
2985 | goto skip_fsfstatus; | |
2986 | } | |
2987 | ||
2988 | adapter = fsf_req->adapter; | |
2989 | header = &fsf_req->qtcb->header; | |
2990 | bottom = &fsf_req->qtcb->bottom.support; | |
2991 | queue_designator = &header->fsf_status_qual.fsf_queue_designator; | |
2992 | ||
2993 | allowed = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED; | |
2994 | exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE; | |
2995 | readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER; | |
2996 | ||
2997 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | | |
2998 | ZFCP_STATUS_UNIT_SHARED | | |
2999 | ZFCP_STATUS_UNIT_READONLY, | |
3000 | &unit->status); | |
3001 | ||
3002 | /* evaluate FSF status in QTCB */ | |
3003 | switch (header->fsf_status) { | |
3004 | ||
3005 | case FSF_PORT_HANDLE_NOT_VALID: | |
1da177e4 LT |
3006 | ZFCP_LOG_INFO("Temporary port identifier 0x%x " |
3007 | "for port 0x%016Lx on adapter %s invalid " | |
3008 | "This may happen occasionally\n", | |
3009 | unit->port->handle, | |
3010 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
3011 | ZFCP_LOG_DEBUG("status qualifier:\n"); | |
3012 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3013 | (char *) &header->fsf_status_qual, | |
3014 | sizeof (union fsf_status_qual)); | |
3015 | debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv"); | |
3016 | zfcp_erp_adapter_reopen(unit->port->adapter, 0); | |
3017 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3018 | break; | |
3019 | ||
3020 | case FSF_LUN_ALREADY_OPEN: | |
1da177e4 LT |
3021 | ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on " |
3022 | "remote port 0x%016Lx on adapter %s twice.\n", | |
3023 | unit->fcp_lun, | |
3024 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
3025 | debug_text_exception(adapter->erp_dbf, 0, | |
3026 | "fsf_s_uopen"); | |
3027 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3028 | break; | |
3029 | ||
3030 | case FSF_ACCESS_DENIED: | |
1da177e4 LT |
3031 | ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on " |
3032 | "remote port 0x%016Lx on adapter %s\n", | |
3033 | unit->fcp_lun, unit->port->wwpn, | |
3034 | zfcp_get_busid_by_unit(unit)); | |
3035 | for (counter = 0; counter < 2; counter++) { | |
3036 | subtable = header->fsf_status_qual.halfword[counter * 2]; | |
3037 | rule = header->fsf_status_qual.halfword[counter * 2 + 1]; | |
3038 | switch (subtable) { | |
3039 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
3040 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
3041 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
3042 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
3043 | ZFCP_LOG_INFO("Access denied (%s rule %d)\n", | |
3044 | zfcp_act_subtable_type[subtable], rule); | |
3045 | break; | |
3046 | } | |
3047 | } | |
3048 | debug_text_event(adapter->erp_dbf, 1, "fsf_s_access"); | |
3049 | zfcp_erp_unit_access_denied(unit); | |
3050 | atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); | |
3051 | atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); | |
3052 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3053 | break; | |
3054 | ||
3055 | case FSF_PORT_BOXED: | |
1da177e4 LT |
3056 | ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " |
3057 | "needs to be reopened\n", | |
3058 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
3059 | debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed"); | |
3060 | zfcp_erp_port_reopen(unit->port, 0); | |
3061 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | | |
3062 | ZFCP_STATUS_FSFREQ_RETRY; | |
3063 | break; | |
3064 | ||
3065 | case FSF_LUN_SHARING_VIOLATION: | |
1da177e4 LT |
3066 | if (header->fsf_status_qual.word[0] != 0) { |
3067 | ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port " | |
3068 | "with WWPN 0x%Lx " | |
3069 | "connected to the adapter %s " | |
3070 | "is already in use in LPAR%d, CSS%d\n", | |
3071 | unit->fcp_lun, | |
3072 | unit->port->wwpn, | |
3073 | zfcp_get_busid_by_unit(unit), | |
3074 | queue_designator->hla, | |
3075 | queue_designator->cssid); | |
3076 | } else { | |
3077 | subtable = header->fsf_status_qual.halfword[4]; | |
3078 | rule = header->fsf_status_qual.halfword[5]; | |
3079 | switch (subtable) { | |
3080 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
3081 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
3082 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
3083 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
3084 | ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the " | |
3085 | "remote port with WWPN 0x%Lx " | |
3086 | "connected to the adapter %s " | |
3087 | "is denied (%s rule %d)\n", | |
3088 | unit->fcp_lun, | |
3089 | unit->port->wwpn, | |
3090 | zfcp_get_busid_by_unit(unit), | |
3091 | zfcp_act_subtable_type[subtable], | |
3092 | rule); | |
3093 | break; | |
3094 | } | |
3095 | } | |
3096 | ZFCP_LOG_DEBUG("status qualifier:\n"); | |
3097 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3098 | (char *) &header->fsf_status_qual, | |
3099 | sizeof (union fsf_status_qual)); | |
3100 | debug_text_event(adapter->erp_dbf, 2, | |
3101 | "fsf_s_l_sh_vio"); | |
3102 | zfcp_erp_unit_access_denied(unit); | |
3103 | atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); | |
3104 | atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); | |
3105 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3106 | break; | |
3107 | ||
3108 | case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: | |
1da177e4 LT |
3109 | ZFCP_LOG_INFO("error: The adapter ran out of resources. " |
3110 | "There is no handle (temporary port identifier) " | |
3111 | "available for unit 0x%016Lx on port 0x%016Lx " | |
3112 | "on adapter %s\n", | |
3113 | unit->fcp_lun, | |
3114 | unit->port->wwpn, | |
3115 | zfcp_get_busid_by_unit(unit)); | |
3116 | debug_text_event(adapter->erp_dbf, 1, | |
3117 | "fsf_s_max_units"); | |
3118 | zfcp_erp_unit_failed(unit); | |
3119 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3120 | break; | |
3121 | ||
3122 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
3123 | switch (header->fsf_status_qual.word[0]) { |
3124 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
3125 | /* Re-establish link to port */ |
3126 | debug_text_event(adapter->erp_dbf, 1, | |
3127 | "fsf_sq_ltest"); | |
3128 | zfcp_erp_port_reopen(unit->port, 0); | |
3129 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3130 | break; | |
3131 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
3132 | /* ERP strategy will escalate */ |
3133 | debug_text_event(adapter->erp_dbf, 1, | |
3134 | "fsf_sq_ulp"); | |
3135 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3136 | break; | |
3137 | default: | |
3138 | ZFCP_LOG_NORMAL | |
3139 | ("bug: Wrong status qualifier 0x%x arrived.\n", | |
3140 | header->fsf_status_qual.word[0]); | |
3141 | debug_text_event(adapter->erp_dbf, 0, | |
3142 | "fsf_sq_inval:"); | |
3143 | debug_exception(adapter->erp_dbf, 0, | |
3144 | &header->fsf_status_qual.word[0], | |
3145 | sizeof (u32)); | |
3146 | } | |
3147 | break; | |
3148 | ||
3149 | case FSF_INVALID_COMMAND_OPTION: | |
1da177e4 LT |
3150 | ZFCP_LOG_NORMAL( |
3151 | "Invalid option 0x%x has been specified " | |
3152 | "in QTCB bottom sent to the adapter %s\n", | |
3153 | bottom->option, | |
3154 | zfcp_get_busid_by_adapter(adapter)); | |
3155 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3156 | retval = -EINVAL; | |
3157 | break; | |
3158 | ||
3159 | case FSF_GOOD: | |
1da177e4 LT |
3160 | /* save LUN handle assigned by FSF */ |
3161 | unit->handle = header->lun_handle; | |
3162 | ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on " | |
3163 | "adapter %s opened, port handle 0x%x\n", | |
3164 | unit->fcp_lun, | |
3165 | unit->port->wwpn, | |
3166 | zfcp_get_busid_by_unit(unit), | |
3167 | unit->handle); | |
3168 | /* mark unit as open */ | |
3169 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); | |
3170 | ||
3171 | if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){ | |
3172 | if (!exclusive) | |
3173 | atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, | |
3174 | &unit->status); | |
3175 | ||
3176 | if (!readwrite) { | |
3177 | atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, | |
3178 | &unit->status); | |
3179 | ZFCP_LOG_NORMAL("read-only access for unit " | |
3180 | "(adapter %s, wwpn=0x%016Lx, " | |
3181 | "fcp_lun=0x%016Lx)\n", | |
3182 | zfcp_get_busid_by_unit(unit), | |
3183 | unit->port->wwpn, | |
3184 | unit->fcp_lun); | |
3185 | } | |
3186 | ||
3187 | if (exclusive && !readwrite) { | |
3188 | ZFCP_LOG_NORMAL("exclusive access of read-only " | |
3189 | "unit not supported\n"); | |
3190 | zfcp_erp_unit_failed(unit); | |
3191 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3192 | zfcp_erp_unit_shutdown(unit, 0); | |
3193 | } else if (!exclusive && readwrite) { | |
3194 | ZFCP_LOG_NORMAL("shared access of read-write " | |
3195 | "unit not supported\n"); | |
3196 | zfcp_erp_unit_failed(unit); | |
3197 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3198 | zfcp_erp_unit_shutdown(unit, 0); | |
3199 | } | |
3200 | } | |
3201 | ||
3202 | retval = 0; | |
3203 | break; | |
3204 | ||
3205 | default: | |
3206 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
3207 | "(debug info 0x%x)\n", | |
3208 | header->fsf_status); | |
3209 | debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:"); | |
3210 | debug_exception(adapter->erp_dbf, 0, | |
3211 | &header->fsf_status, sizeof (u32)); | |
3212 | break; | |
3213 | } | |
3214 | ||
3215 | skip_fsfstatus: | |
3216 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); | |
3217 | return retval; | |
3218 | } | |
3219 | ||
3220 | /* | |
3221 | * function: zfcp_fsf_close_unit | |
3222 | * | |
3223 | * purpose: | |
3224 | * | |
3225 | * returns: address of fsf_req - request successfully initiated | |
3226 | * NULL - | |
3227 | * | |
3228 | * assumptions: This routine does not check whether the associated | |
3229 | * remote port/lun has already been opened. This should be | |
3230 | * done by calling routines. Otherwise some status | |
3231 | * may be presented by FSF | |
3232 | */ | |
3233 | int | |
3234 | zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) | |
3235 | { | |
3236 | volatile struct qdio_buffer_element *sbale; | |
3237 | unsigned long lock_flags; | |
3238 | int retval = 0; | |
3239 | ||
3240 | /* setup new FSF request */ | |
3241 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
3242 | FSF_QTCB_CLOSE_LUN, | |
3243 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
3244 | erp_action->adapter->pool.fsf_req_erp, | |
3245 | &lock_flags, &(erp_action->fsf_req)); | |
3246 | if (retval < 0) { | |
3247 | ZFCP_LOG_INFO("error: Could not create close unit request for " | |
3248 | "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n", | |
3249 | erp_action->unit->fcp_lun, | |
3250 | erp_action->port->wwpn, | |
3251 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
3252 | goto out; | |
3253 | } | |
3254 | ||
3255 | sbale = zfcp_qdio_sbale_req(erp_action->fsf_req, | |
3256 | erp_action->fsf_req->sbal_curr, 0); | |
3257 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; | |
3258 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
3259 | ||
3260 | erp_action->fsf_req->qtcb->header.port_handle = | |
3261 | erp_action->port->handle; | |
3262 | erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; | |
3263 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); | |
3264 | erp_action->fsf_req->data.close_unit.unit = erp_action->unit; | |
3265 | erp_action->fsf_req->erp_action = erp_action; | |
3266 | ||
3267 | /* start QDIO request for this FSF request */ | |
3268 | retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer); | |
3269 | if (retval) { | |
3270 | ZFCP_LOG_INFO("error: Could not send a close unit request for " | |
3271 | "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n", | |
3272 | erp_action->unit->fcp_lun, | |
3273 | erp_action->port->wwpn, | |
3274 | zfcp_get_busid_by_adapter(erp_action->adapter)); | |
3275 | zfcp_fsf_req_free(erp_action->fsf_req); | |
3276 | erp_action->fsf_req = NULL; | |
3277 | goto out; | |
3278 | } | |
3279 | ||
3280 | ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, " | |
3281 | "port 0x%016Lx, unit 0x%016Lx)\n", | |
3282 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
3283 | erp_action->port->wwpn, erp_action->unit->fcp_lun); | |
3284 | out: | |
3285 | write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock, | |
3286 | lock_flags); | |
3287 | return retval; | |
3288 | } | |
3289 | ||
3290 | /* | |
3291 | * function: zfcp_fsf_close_unit_handler | |
3292 | * | |
3293 | * purpose: is called for finished Close LUN FSF command | |
3294 | * | |
3295 | * returns: | |
3296 | */ | |
3297 | static int | |
3298 | zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) | |
3299 | { | |
3300 | int retval = -EINVAL; | |
3301 | struct zfcp_unit *unit; | |
3302 | ||
3303 | unit = fsf_req->data.close_unit.unit; /* restore unit */ | |
3304 | ||
3305 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
3306 | /* don't change unit status in our bookkeeping */ | |
3307 | goto skip_fsfstatus; | |
3308 | } | |
3309 | ||
3310 | /* evaluate FSF status in QTCB */ | |
3311 | switch (fsf_req->qtcb->header.fsf_status) { | |
3312 | ||
3313 | case FSF_PORT_HANDLE_NOT_VALID: | |
1da177e4 LT |
3314 | ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " |
3315 | "0x%016Lx on adapter %s invalid. This may " | |
3316 | "happen in rare circumstances\n", | |
3317 | unit->port->handle, | |
3318 | unit->port->wwpn, | |
3319 | zfcp_get_busid_by_unit(unit)); | |
3320 | ZFCP_LOG_DEBUG("status qualifier:\n"); | |
3321 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3322 | (char *) &fsf_req->qtcb->header.fsf_status_qual, | |
3323 | sizeof (union fsf_status_qual)); | |
3324 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3325 | "fsf_s_phand_nv"); | |
3326 | zfcp_erp_adapter_reopen(unit->port->adapter, 0); | |
3327 | zfcp_cmd_dbf_event_fsf("porthinv", fsf_req, | |
3328 | &fsf_req->qtcb->header.fsf_status_qual, | |
3329 | sizeof (union fsf_status_qual)); | |
3330 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3331 | break; | |
3332 | ||
3333 | case FSF_LUN_HANDLE_NOT_VALID: | |
1da177e4 LT |
3334 | ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit " |
3335 | "0x%016Lx on port 0x%016Lx on adapter %s is " | |
3336 | "invalid. This may happen occasionally.\n", | |
3337 | unit->handle, | |
3338 | unit->fcp_lun, | |
3339 | unit->port->wwpn, | |
3340 | zfcp_get_busid_by_unit(unit)); | |
3341 | ZFCP_LOG_DEBUG("Status qualifier data:\n"); | |
3342 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3343 | (char *) &fsf_req->qtcb->header.fsf_status_qual, | |
3344 | sizeof (union fsf_status_qual)); | |
3345 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3346 | "fsf_s_lhand_nv"); | |
3347 | zfcp_erp_port_reopen(unit->port, 0); | |
3348 | zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req, | |
3349 | &fsf_req->qtcb->header.fsf_status_qual, | |
3350 | sizeof (union fsf_status_qual)); | |
3351 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3352 | break; | |
3353 | ||
3354 | case FSF_PORT_BOXED: | |
1da177e4 LT |
3355 | ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " |
3356 | "needs to be reopened\n", | |
3357 | unit->port->wwpn, | |
3358 | zfcp_get_busid_by_unit(unit)); | |
3359 | debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); | |
3360 | zfcp_erp_port_reopen(unit->port, 0); | |
3361 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | | |
3362 | ZFCP_STATUS_FSFREQ_RETRY; | |
3363 | break; | |
3364 | ||
3365 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
3366 | switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { |
3367 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
3368 | /* re-establish link to port */ |
3369 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3370 | "fsf_sq_ltest"); | |
3371 | zfcp_erp_port_reopen(unit->port, 0); | |
3372 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3373 | break; | |
3374 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
3375 | /* ERP strategy will escalate */ |
3376 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3377 | "fsf_sq_ulp"); | |
3378 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3379 | break; | |
3380 | default: | |
3381 | ZFCP_LOG_NORMAL | |
3382 | ("bug: Wrong status qualifier 0x%x arrived.\n", | |
3383 | fsf_req->qtcb->header.fsf_status_qual.word[0]); | |
3384 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
3385 | "fsf_sq_inval:"); | |
3386 | debug_exception( | |
3387 | fsf_req->adapter->erp_dbf, 0, | |
3388 | &fsf_req->qtcb->header.fsf_status_qual.word[0], | |
3389 | sizeof (u32)); | |
3390 | break; | |
3391 | } | |
3392 | break; | |
3393 | ||
3394 | case FSF_GOOD: | |
1da177e4 LT |
3395 | ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s " |
3396 | "closed, port handle 0x%x\n", | |
3397 | unit->fcp_lun, | |
3398 | unit->port->wwpn, | |
3399 | zfcp_get_busid_by_unit(unit), | |
3400 | unit->handle); | |
3401 | /* mark unit as closed */ | |
3402 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); | |
3403 | retval = 0; | |
3404 | break; | |
3405 | ||
3406 | default: | |
3407 | ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented " | |
3408 | "(debug info 0x%x)\n", | |
3409 | fsf_req->qtcb->header.fsf_status); | |
3410 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); | |
3411 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
3412 | &fsf_req->qtcb->header.fsf_status, | |
3413 | sizeof (u32)); | |
3414 | break; | |
3415 | } | |
3416 | ||
3417 | skip_fsfstatus: | |
3418 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); | |
3419 | return retval; | |
3420 | } | |
3421 | ||
3422 | /** | |
3423 | * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) | |
3424 | * @adapter: adapter where scsi command is issued | |
3425 | * @unit: unit where command is sent to | |
3426 | * @scsi_cmnd: scsi command to be sent | |
3427 | * @timer: timer to be started when request is initiated | |
3428 | * @req_flags: flags for fsf_request | |
3429 | */ | |
3430 | int | |
3431 | zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, | |
3432 | struct zfcp_unit *unit, | |
3433 | struct scsi_cmnd * scsi_cmnd, | |
3434 | struct timer_list *timer, int req_flags) | |
3435 | { | |
3436 | struct zfcp_fsf_req *fsf_req = NULL; | |
3437 | struct fcp_cmnd_iu *fcp_cmnd_iu; | |
3438 | unsigned int sbtype; | |
3439 | unsigned long lock_flags; | |
3440 | int real_bytes = 0; | |
3441 | int retval = 0; | |
3442 | int mask; | |
3443 | ||
3444 | /* setup new FSF request */ | |
3445 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, | |
3446 | adapter->pool.fsf_req_scsi, | |
3447 | &lock_flags, &fsf_req); | |
3448 | if (unlikely(retval < 0)) { | |
3449 | ZFCP_LOG_DEBUG("error: Could not create FCP command request " | |
3450 | "for unit 0x%016Lx on port 0x%016Lx on " | |
3451 | "adapter %s\n", | |
3452 | unit->fcp_lun, | |
3453 | unit->port->wwpn, | |
3454 | zfcp_get_busid_by_adapter(adapter)); | |
3455 | goto failed_req_create; | |
3456 | } | |
3457 | ||
3458 | /* | |
3459 | * associate FSF request with SCSI request | |
3460 | * (need this for look up on abort) | |
3461 | */ | |
3462 | fsf_req->data.send_fcp_command_task.fsf_req = fsf_req; | |
3463 | scsi_cmnd->host_scribble = (char *) &(fsf_req->data); | |
3464 | ||
3465 | /* | |
3466 | * associate SCSI command with FSF request | |
3467 | * (need this for look up on normal command completion) | |
3468 | */ | |
3469 | fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd; | |
3470 | fsf_req->data.send_fcp_command_task.start_jiffies = jiffies; | |
3471 | fsf_req->data.send_fcp_command_task.unit = unit; | |
3472 | ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun); | |
3473 | ||
3474 | /* set handles of unit and its parent port in QTCB */ | |
3475 | fsf_req->qtcb->header.lun_handle = unit->handle; | |
3476 | fsf_req->qtcb->header.port_handle = unit->port->handle; | |
3477 | ||
3478 | /* FSF does not define the structure of the FCP_CMND IU */ | |
3479 | fcp_cmnd_iu = (struct fcp_cmnd_iu *) | |
3480 | &(fsf_req->qtcb->bottom.io.fcp_cmnd); | |
3481 | ||
3482 | /* | |
3483 | * set depending on data direction: | |
3484 | * data direction bits in SBALE (SB Type) | |
3485 | * data direction bits in QTCB | |
3486 | * data direction bits in FCP_CMND IU | |
3487 | */ | |
3488 | switch (scsi_cmnd->sc_data_direction) { | |
3489 | case DMA_NONE: | |
1da177e4 LT |
3490 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; |
3491 | /* | |
3492 | * FIXME(qdio): | |
3493 | * what is the correct type for commands | |
3494 | * without 'real' data buffers? | |
3495 | */ | |
3496 | sbtype = SBAL_FLAGS0_TYPE_READ; | |
3497 | break; | |
3498 | case DMA_FROM_DEVICE: | |
1da177e4 LT |
3499 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; |
3500 | sbtype = SBAL_FLAGS0_TYPE_READ; | |
3501 | fcp_cmnd_iu->rddata = 1; | |
3502 | break; | |
3503 | case DMA_TO_DEVICE: | |
1da177e4 LT |
3504 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; |
3505 | sbtype = SBAL_FLAGS0_TYPE_WRITE; | |
3506 | fcp_cmnd_iu->wddata = 1; | |
3507 | break; | |
3508 | case DMA_BIDIRECTIONAL: | |
1da177e4 LT |
3509 | default: |
3510 | /* | |
3511 | * dummy, catch this condition earlier | |
3512 | * in zfcp_scsi_queuecommand | |
3513 | */ | |
3514 | goto failed_scsi_cmnd; | |
3515 | } | |
3516 | ||
3517 | /* set FC service class in QTCB (3 per default) */ | |
3518 | fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class; | |
3519 | ||
3520 | /* set FCP_LUN in FCP_CMND IU in QTCB */ | |
3521 | fcp_cmnd_iu->fcp_lun = unit->fcp_lun; | |
3522 | ||
3523 | mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; | |
3524 | ||
3525 | /* set task attributes in FCP_CMND IU in QTCB */ | |
3526 | if (likely((scsi_cmnd->device->simple_tags) || | |
3527 | (atomic_test_mask(mask, &unit->status)))) | |
3528 | fcp_cmnd_iu->task_attribute = SIMPLE_Q; | |
3529 | else | |
3530 | fcp_cmnd_iu->task_attribute = UNTAGGED; | |
3531 | ||
3532 | /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ | |
3533 | if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) { | |
3534 | fcp_cmnd_iu->add_fcp_cdb_length | |
3535 | = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; | |
3536 | ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, " | |
3537 | "additional FCP_CDB length is 0x%x " | |
3538 | "(shifted right 2 bits)\n", | |
3539 | scsi_cmnd->cmd_len, | |
3540 | fcp_cmnd_iu->add_fcp_cdb_length); | |
3541 | } | |
3542 | /* | |
3543 | * copy SCSI CDB (including additional length, if any) to | |
3544 | * FCP_CDB in FCP_CMND IU in QTCB | |
3545 | */ | |
3546 | memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); | |
3547 | ||
3548 | /* FCP CMND IU length in QTCB */ | |
3549 | fsf_req->qtcb->bottom.io.fcp_cmnd_length = | |
3550 | sizeof (struct fcp_cmnd_iu) + | |
3551 | fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); | |
3552 | ||
3553 | /* generate SBALEs from data buffer */ | |
3554 | real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd); | |
3555 | if (unlikely(real_bytes < 0)) { | |
3556 | if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) { | |
3557 | ZFCP_LOG_DEBUG( | |
3558 | "Data did not fit into available buffer(s), " | |
3559 | "waiting for more...\n"); | |
3560 | retval = -EIO; | |
3561 | } else { | |
3562 | ZFCP_LOG_NORMAL("error: No truncation implemented but " | |
3563 | "required. Shutting down unit " | |
3564 | "(adapter %s, port 0x%016Lx, " | |
3565 | "unit 0x%016Lx)\n", | |
3566 | zfcp_get_busid_by_unit(unit), | |
3567 | unit->port->wwpn, | |
3568 | unit->fcp_lun); | |
3569 | zfcp_erp_unit_shutdown(unit, 0); | |
3570 | retval = -EINVAL; | |
3571 | } | |
3572 | goto no_fit; | |
3573 | } | |
3574 | ||
3575 | /* set length of FCP data length in FCP_CMND IU in QTCB */ | |
3576 | zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); | |
3577 | ||
3578 | ZFCP_LOG_DEBUG("Sending SCSI command:\n"); | |
3579 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3580 | (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len); | |
3581 | ||
3582 | /* | |
3583 | * start QDIO request for this FSF request | |
3584 | * covered by an SBALE) | |
3585 | */ | |
3586 | retval = zfcp_fsf_req_send(fsf_req, timer); | |
3587 | if (unlikely(retval < 0)) { | |
3588 | ZFCP_LOG_INFO("error: Could not send FCP command request " | |
3589 | "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", | |
3590 | zfcp_get_busid_by_adapter(adapter), | |
3591 | unit->port->wwpn, | |
3592 | unit->fcp_lun); | |
3593 | goto send_failed; | |
3594 | } | |
3595 | ||
3596 | ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, " | |
3597 | "port 0x%016Lx, unit 0x%016Lx)\n", | |
3598 | zfcp_get_busid_by_adapter(adapter), | |
3599 | unit->port->wwpn, | |
3600 | unit->fcp_lun); | |
3601 | goto success; | |
3602 | ||
3603 | send_failed: | |
3604 | no_fit: | |
3605 | failed_scsi_cmnd: | |
3606 | zfcp_fsf_req_free(fsf_req); | |
3607 | fsf_req = NULL; | |
3608 | scsi_cmnd->host_scribble = NULL; | |
3609 | success: | |
3610 | failed_req_create: | |
3611 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); | |
3612 | return retval; | |
3613 | } | |
3614 | ||
3615 | /* | |
3616 | * function: zfcp_fsf_send_fcp_command_task_management | |
3617 | * | |
3618 | * purpose: | |
3619 | * | |
3620 | * returns: | |
3621 | * | |
3622 | * FIXME(design): should be watched by a timeout!!! | |
3623 | * FIXME(design) shouldn't this be modified to return an int | |
3624 | * also...don't know how though | |
3625 | * | |
3626 | */ | |
3627 | struct zfcp_fsf_req * | |
3628 | zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, | |
3629 | struct zfcp_unit *unit, | |
3630 | u8 tm_flags, int req_flags) | |
3631 | { | |
3632 | struct zfcp_fsf_req *fsf_req = NULL; | |
3633 | int retval = 0; | |
3634 | struct fcp_cmnd_iu *fcp_cmnd_iu; | |
3635 | unsigned long lock_flags; | |
3636 | volatile struct qdio_buffer_element *sbale; | |
3637 | ||
3638 | /* setup new FSF request */ | |
3639 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, | |
3640 | adapter->pool.fsf_req_scsi, | |
3641 | &lock_flags, &fsf_req); | |
3642 | if (retval < 0) { | |
3643 | ZFCP_LOG_INFO("error: Could not create FCP command (task " | |
3644 | "management) request for adapter %s, port " | |
3645 | " 0x%016Lx, unit 0x%016Lx.\n", | |
3646 | zfcp_get_busid_by_adapter(adapter), | |
3647 | unit->port->wwpn, unit->fcp_lun); | |
3648 | goto out; | |
3649 | } | |
3650 | ||
3651 | /* | |
3652 | * Used to decide on proper handler in the return path, | |
3653 | * could be either zfcp_fsf_send_fcp_command_task_handler or | |
3654 | * zfcp_fsf_send_fcp_command_task_management_handler */ | |
3655 | ||
3656 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; | |
3657 | ||
3658 | /* | |
3659 | * hold a pointer to the unit being target of this | |
3660 | * task management request | |
3661 | */ | |
3662 | fsf_req->data.send_fcp_command_task_management.unit = unit; | |
3663 | ||
3664 | /* set FSF related fields in QTCB */ | |
3665 | fsf_req->qtcb->header.lun_handle = unit->handle; | |
3666 | fsf_req->qtcb->header.port_handle = unit->port->handle; | |
3667 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; | |
3668 | fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class; | |
3669 | fsf_req->qtcb->bottom.io.fcp_cmnd_length = | |
3670 | sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); | |
3671 | ||
3672 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
3673 | sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; | |
3674 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
3675 | ||
3676 | /* set FCP related fields in FCP_CMND IU in QTCB */ | |
3677 | fcp_cmnd_iu = (struct fcp_cmnd_iu *) | |
3678 | &(fsf_req->qtcb->bottom.io.fcp_cmnd); | |
3679 | fcp_cmnd_iu->fcp_lun = unit->fcp_lun; | |
3680 | fcp_cmnd_iu->task_management_flags = tm_flags; | |
3681 | ||
3682 | /* start QDIO request for this FSF request */ | |
3683 | zfcp_fsf_start_scsi_er_timer(adapter); | |
3684 | retval = zfcp_fsf_req_send(fsf_req, NULL); | |
3685 | if (retval) { | |
3686 | del_timer(&adapter->scsi_er_timer); | |
3687 | ZFCP_LOG_INFO("error: Could not send an FCP-command (task " | |
3688 | "management) on adapter %s, port 0x%016Lx for " | |
3689 | "unit LUN 0x%016Lx\n", | |
3690 | zfcp_get_busid_by_adapter(adapter), | |
3691 | unit->port->wwpn, | |
3692 | unit->fcp_lun); | |
3693 | zfcp_fsf_req_free(fsf_req); | |
3694 | fsf_req = NULL; | |
3695 | goto out; | |
3696 | } | |
3697 | ||
3698 | ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated " | |
3699 | "(adapter %s, port 0x%016Lx, unit 0x%016Lx, " | |
3700 | "tm_flags=0x%x)\n", | |
3701 | zfcp_get_busid_by_adapter(adapter), | |
3702 | unit->port->wwpn, | |
3703 | unit->fcp_lun, | |
3704 | tm_flags); | |
3705 | out: | |
3706 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); | |
3707 | return fsf_req; | |
3708 | } | |
3709 | ||
3710 | /* | |
3711 | * function: zfcp_fsf_send_fcp_command_handler | |
3712 | * | |
3713 | * purpose: is called for finished Send FCP Command | |
3714 | * | |
3715 | * returns: | |
3716 | */ | |
3717 | static int | |
3718 | zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) | |
3719 | { | |
3720 | int retval = -EINVAL; | |
3721 | struct zfcp_unit *unit; | |
3722 | struct fsf_qtcb_header *header; | |
3723 | u16 subtable, rule, counter; | |
3724 | ||
3725 | header = &fsf_req->qtcb->header; | |
3726 | ||
3727 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) | |
3728 | unit = fsf_req->data.send_fcp_command_task_management.unit; | |
3729 | else | |
3730 | unit = fsf_req->data.send_fcp_command_task.unit; | |
3731 | ||
3732 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
3733 | /* go directly to calls of special handlers */ | |
3734 | goto skip_fsfstatus; | |
3735 | } | |
3736 | ||
3737 | /* evaluate FSF status in QTCB */ | |
3738 | switch (header->fsf_status) { | |
3739 | ||
3740 | case FSF_PORT_HANDLE_NOT_VALID: | |
1da177e4 LT |
3741 | ZFCP_LOG_INFO("Temporary port identifier 0x%x for port " |
3742 | "0x%016Lx on adapter %s invalid\n", | |
3743 | unit->port->handle, | |
3744 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
3745 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3746 | (char *) &header->fsf_status_qual, | |
3747 | sizeof (union fsf_status_qual)); | |
3748 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3749 | "fsf_s_phand_nv"); | |
3750 | zfcp_erp_adapter_reopen(unit->port->adapter, 0); | |
3751 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3752 | break; | |
3753 | ||
3754 | case FSF_LUN_HANDLE_NOT_VALID: | |
1da177e4 LT |
3755 | ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit " |
3756 | "0x%016Lx on port 0x%016Lx on adapter %s is " | |
3757 | "invalid. This may happen occasionally.\n", | |
3758 | unit->handle, | |
3759 | unit->fcp_lun, | |
3760 | unit->port->wwpn, | |
3761 | zfcp_get_busid_by_unit(unit)); | |
3762 | ZFCP_LOG_NORMAL("Status qualifier data:\n"); | |
3763 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, | |
3764 | (char *) &header->fsf_status_qual, | |
3765 | sizeof (union fsf_status_qual)); | |
3766 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3767 | "fsf_s_uhand_nv"); | |
3768 | zfcp_erp_port_reopen(unit->port, 0); | |
3769 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3770 | break; | |
3771 | ||
3772 | case FSF_HANDLE_MISMATCH: | |
1da177e4 LT |
3773 | ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed " |
3774 | "unexpectedly. (adapter %s, port 0x%016Lx, " | |
3775 | "unit 0x%016Lx)\n", | |
3776 | unit->port->handle, | |
3777 | zfcp_get_busid_by_unit(unit), | |
3778 | unit->port->wwpn, | |
3779 | unit->fcp_lun); | |
3780 | ZFCP_LOG_NORMAL("status qualifier:\n"); | |
3781 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, | |
3782 | (char *) &header->fsf_status_qual, | |
3783 | sizeof (union fsf_status_qual)); | |
3784 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3785 | "fsf_s_hand_mis"); | |
3786 | zfcp_erp_adapter_reopen(unit->port->adapter, 0); | |
3787 | zfcp_cmd_dbf_event_fsf("handmism", | |
3788 | fsf_req, | |
3789 | &header->fsf_status_qual, | |
3790 | sizeof (union fsf_status_qual)); | |
3791 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3792 | break; | |
3793 | ||
3794 | case FSF_SERVICE_CLASS_NOT_SUPPORTED: | |
1da177e4 LT |
3795 | if (fsf_req->adapter->fc_service_class <= 3) { |
3796 | ZFCP_LOG_NORMAL("error: The adapter %s does " | |
3797 | "not support fibrechannel class %d.\n", | |
3798 | zfcp_get_busid_by_unit(unit), | |
3799 | fsf_req->adapter->fc_service_class); | |
3800 | } else { | |
3801 | ZFCP_LOG_NORMAL("bug: The fibrechannel class at " | |
3802 | "adapter %s is invalid. " | |
3803 | "(debug info %d)\n", | |
3804 | zfcp_get_busid_by_unit(unit), | |
3805 | fsf_req->adapter->fc_service_class); | |
3806 | } | |
3807 | /* stop operation for this adapter */ | |
3808 | debug_text_exception(fsf_req->adapter->erp_dbf, 0, | |
3809 | "fsf_s_class_nsup"); | |
3810 | zfcp_erp_adapter_shutdown(unit->port->adapter, 0); | |
3811 | zfcp_cmd_dbf_event_fsf("unsclass", | |
3812 | fsf_req, | |
3813 | &header->fsf_status_qual, | |
3814 | sizeof (union fsf_status_qual)); | |
3815 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3816 | break; | |
3817 | ||
3818 | case FSF_FCPLUN_NOT_VALID: | |
1da177e4 LT |
3819 | ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on " |
3820 | "adapter %s does not have correct unit " | |
3821 | "handle 0x%x\n", | |
3822 | unit->fcp_lun, | |
3823 | unit->port->wwpn, | |
3824 | zfcp_get_busid_by_unit(unit), | |
3825 | unit->handle); | |
3826 | ZFCP_LOG_DEBUG("status qualifier:\n"); | |
3827 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
3828 | (char *) &header->fsf_status_qual, | |
3829 | sizeof (union fsf_status_qual)); | |
3830 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3831 | "fsf_s_fcp_lun_nv"); | |
3832 | zfcp_erp_port_reopen(unit->port, 0); | |
3833 | zfcp_cmd_dbf_event_fsf("fluninv", | |
3834 | fsf_req, | |
3835 | &header->fsf_status_qual, | |
3836 | sizeof (union fsf_status_qual)); | |
3837 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3838 | break; | |
3839 | ||
3840 | case FSF_ACCESS_DENIED: | |
1da177e4 LT |
3841 | ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to " |
3842 | "unit 0x%016Lx on port 0x%016Lx on " | |
3843 | "adapter %s\n", unit->fcp_lun, unit->port->wwpn, | |
3844 | zfcp_get_busid_by_unit(unit)); | |
3845 | for (counter = 0; counter < 2; counter++) { | |
3846 | subtable = header->fsf_status_qual.halfword[counter * 2]; | |
3847 | rule = header->fsf_status_qual.halfword[counter * 2 + 1]; | |
3848 | switch (subtable) { | |
3849 | case FSF_SQ_CFDC_SUBTABLE_OS: | |
3850 | case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN: | |
3851 | case FSF_SQ_CFDC_SUBTABLE_PORT_DID: | |
3852 | case FSF_SQ_CFDC_SUBTABLE_LUN: | |
3853 | ZFCP_LOG_INFO("Access denied (%s rule %d)\n", | |
3854 | zfcp_act_subtable_type[subtable], rule); | |
3855 | break; | |
3856 | } | |
3857 | } | |
3858 | debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access"); | |
3859 | zfcp_erp_unit_access_denied(unit); | |
3860 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3861 | break; | |
3862 | ||
3863 | case FSF_DIRECTION_INDICATOR_NOT_VALID: | |
1da177e4 LT |
3864 | ZFCP_LOG_INFO("bug: Invalid data direction given for unit " |
3865 | "0x%016Lx on port 0x%016Lx on adapter %s " | |
3866 | "(debug info %d)\n", | |
3867 | unit->fcp_lun, | |
3868 | unit->port->wwpn, | |
3869 | zfcp_get_busid_by_unit(unit), | |
3870 | fsf_req->qtcb->bottom.io.data_direction); | |
3871 | /* stop operation for this adapter */ | |
3872 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
3873 | "fsf_s_dir_ind_nv"); | |
3874 | zfcp_erp_adapter_shutdown(unit->port->adapter, 0); | |
3875 | zfcp_cmd_dbf_event_fsf("dirinv", | |
3876 | fsf_req, | |
3877 | &header->fsf_status_qual, | |
3878 | sizeof (union fsf_status_qual)); | |
3879 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3880 | break; | |
3881 | ||
3882 | case FSF_CMND_LENGTH_NOT_VALID: | |
1da177e4 LT |
3883 | ZFCP_LOG_NORMAL |
3884 | ("bug: An invalid control-data-block length field " | |
3885 | "was found in a command for unit 0x%016Lx on port " | |
3886 | "0x%016Lx on adapter %s " "(debug info %d)\n", | |
3887 | unit->fcp_lun, unit->port->wwpn, | |
3888 | zfcp_get_busid_by_unit(unit), | |
3889 | fsf_req->qtcb->bottom.io.fcp_cmnd_length); | |
3890 | /* stop operation for this adapter */ | |
3891 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
3892 | "fsf_s_cmd_len_nv"); | |
3893 | zfcp_erp_adapter_shutdown(unit->port->adapter, 0); | |
3894 | zfcp_cmd_dbf_event_fsf("cleninv", | |
3895 | fsf_req, | |
3896 | &header->fsf_status_qual, | |
3897 | sizeof (union fsf_status_qual)); | |
3898 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3899 | break; | |
3900 | ||
3901 | case FSF_PORT_BOXED: | |
1da177e4 LT |
3902 | ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s " |
3903 | "needs to be reopened\n", | |
3904 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
3905 | debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed"); | |
3906 | zfcp_erp_port_reopen(unit->port, 0); | |
3907 | zfcp_cmd_dbf_event_fsf("portbox", fsf_req, | |
3908 | &header->fsf_status_qual, | |
3909 | sizeof (union fsf_status_qual)); | |
3910 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | | |
3911 | ZFCP_STATUS_FSFREQ_RETRY; | |
3912 | break; | |
3913 | ||
3914 | case FSF_LUN_BOXED: | |
1da177e4 LT |
3915 | ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, " |
3916 | "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", | |
3917 | zfcp_get_busid_by_unit(unit), | |
3918 | unit->port->wwpn, unit->fcp_lun); | |
3919 | debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed"); | |
3920 | zfcp_erp_unit_reopen(unit, 0); | |
3921 | zfcp_cmd_dbf_event_fsf("unitbox", fsf_req, | |
3922 | &header->fsf_status_qual, | |
3923 | sizeof(union fsf_status_qual)); | |
3924 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
3925 | | ZFCP_STATUS_FSFREQ_RETRY; | |
3926 | break; | |
3927 | ||
3928 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
3929 | switch (header->fsf_status_qual.word[0]) { |
3930 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
3931 | /* re-establish link to port */ |
3932 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3933 | "fsf_sq_ltest"); | |
3934 | zfcp_erp_port_reopen(unit->port, 0); | |
3935 | zfcp_cmd_dbf_event_fsf( | |
3936 | "sqltest", | |
3937 | fsf_req, | |
3938 | &header->fsf_status_qual, | |
3939 | sizeof (union fsf_status_qual)); | |
3940 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3941 | break; | |
3942 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
3943 | /* FIXME(hw) need proper specs for proper action */ |
3944 | /* let scsi stack deal with retries and escalation */ | |
3945 | debug_text_event(fsf_req->adapter->erp_dbf, 1, | |
3946 | "fsf_sq_ulp"); | |
3947 | zfcp_cmd_dbf_event_fsf( | |
3948 | "sqdeperp", | |
3949 | fsf_req, | |
3950 | &header->fsf_status_qual, | |
3951 | sizeof (union fsf_status_qual)); | |
3952 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
3953 | break; | |
3954 | default: | |
3955 | /* FIXME: shall we consider this a successful transfer? */ | |
3956 | ZFCP_LOG_NORMAL | |
3957 | ("bug: Wrong status qualifier 0x%x arrived.\n", | |
3958 | header->fsf_status_qual.word[0]); | |
3959 | debug_text_event(fsf_req->adapter->erp_dbf, 0, | |
3960 | "fsf_sq_inval:"); | |
3961 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
3962 | &header->fsf_status_qual.word[0], | |
3963 | sizeof(u32)); | |
3964 | break; | |
3965 | } | |
3966 | break; | |
3967 | ||
3968 | case FSF_GOOD: | |
1da177e4 LT |
3969 | break; |
3970 | ||
3971 | case FSF_FCP_RSP_AVAILABLE: | |
1da177e4 LT |
3972 | break; |
3973 | ||
3974 | default: | |
3975 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:"); | |
3976 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
3977 | &header->fsf_status, sizeof(u32)); | |
3978 | break; | |
3979 | } | |
3980 | ||
3981 | skip_fsfstatus: | |
3982 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { | |
3983 | retval = | |
3984 | zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); | |
3985 | } else { | |
3986 | retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); | |
3987 | } | |
3988 | return retval; | |
3989 | } | |
3990 | ||
3991 | /* | |
3992 | * function: zfcp_fsf_send_fcp_command_task_handler | |
3993 | * | |
3994 | * purpose: evaluates FCP_RSP IU | |
3995 | * | |
3996 | * returns: | |
3997 | */ | |
3998 | static int | |
3999 | zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) | |
4000 | { | |
4001 | int retval = 0; | |
4002 | struct scsi_cmnd *scpnt; | |
4003 | struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) | |
4004 | &(fsf_req->qtcb->bottom.io.fcp_rsp); | |
4005 | struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *) | |
4006 | &(fsf_req->qtcb->bottom.io.fcp_cmnd); | |
4007 | u32 sns_len; | |
4008 | char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); | |
4009 | unsigned long flags; | |
4010 | struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit; | |
4011 | ||
4012 | read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); | |
4013 | scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd; | |
4014 | if (unlikely(!scpnt)) { | |
4015 | ZFCP_LOG_DEBUG | |
4016 | ("Command with fsf_req %p is not associated to " | |
4017 | "a scsi command anymore. Aborted?\n", fsf_req); | |
4018 | goto out; | |
4019 | } | |
4020 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { | |
4021 | /* FIXME: (design) mid-layer should handle DID_ABORT like | |
4022 | * DID_SOFT_ERROR by retrying the request for devices | |
4023 | * that allow retries. | |
4024 | */ | |
4025 | ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n"); | |
4026 | set_host_byte(&scpnt->result, DID_SOFT_ERROR); | |
4027 | set_driver_byte(&scpnt->result, SUGGEST_RETRY); | |
4028 | goto skip_fsfstatus; | |
4029 | } | |
4030 | ||
4031 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
4032 | ZFCP_LOG_DEBUG("Setting DID_ERROR\n"); | |
4033 | set_host_byte(&scpnt->result, DID_ERROR); | |
4034 | goto skip_fsfstatus; | |
4035 | } | |
4036 | ||
4037 | /* set message byte of result in SCSI command */ | |
4038 | scpnt->result |= COMMAND_COMPLETE << 8; | |
4039 | ||
4040 | /* | |
4041 | * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte | |
4042 | * of result in SCSI command | |
4043 | */ | |
4044 | scpnt->result |= fcp_rsp_iu->scsi_status; | |
4045 | if (unlikely(fcp_rsp_iu->scsi_status)) { | |
4046 | /* DEBUG */ | |
4047 | ZFCP_LOG_DEBUG("status for SCSI Command:\n"); | |
4048 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4049 | scpnt->cmnd, scpnt->cmd_len); | |
4050 | ZFCP_LOG_DEBUG("SCSI status code 0x%x\n", | |
4051 | fcp_rsp_iu->scsi_status); | |
4052 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4053 | (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu)); | |
4054 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4055 | zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), | |
4056 | fcp_rsp_iu->fcp_sns_len); | |
4057 | } | |
4058 | ||
4059 | /* check FCP_RSP_INFO */ | |
4060 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { | |
4061 | ZFCP_LOG_DEBUG("rsp_len is valid\n"); | |
4062 | switch (fcp_rsp_info[3]) { | |
4063 | case RSP_CODE_GOOD: | |
1da177e4 LT |
4064 | /* ok, continue */ |
4065 | ZFCP_LOG_TRACE("no failure or Task Management " | |
4066 | "Function complete\n"); | |
4067 | set_host_byte(&scpnt->result, DID_OK); | |
4068 | break; | |
4069 | case RSP_CODE_LENGTH_MISMATCH: | |
1da177e4 LT |
4070 | /* hardware bug */ |
4071 | ZFCP_LOG_NORMAL("bug: FCP response code indictates " | |
4072 | "that the fibrechannel protocol data " | |
4073 | "length differs from the burst length. " | |
4074 | "The problem occured on unit 0x%016Lx " | |
4075 | "on port 0x%016Lx on adapter %s", | |
4076 | unit->fcp_lun, | |
4077 | unit->port->wwpn, | |
4078 | zfcp_get_busid_by_unit(unit)); | |
4079 | /* dump SCSI CDB as prepared by zfcp */ | |
4080 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4081 | (char *) &fsf_req->qtcb-> | |
4082 | bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); | |
4083 | zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0); | |
4084 | set_host_byte(&scpnt->result, DID_ERROR); | |
4085 | goto skip_fsfstatus; | |
4086 | case RSP_CODE_FIELD_INVALID: | |
1da177e4 LT |
4087 | /* driver or hardware bug */ |
4088 | ZFCP_LOG_NORMAL("bug: FCP response code indictates " | |
4089 | "that the fibrechannel protocol data " | |
4090 | "fields were incorrectly set up. " | |
4091 | "The problem occured on the unit " | |
4092 | "0x%016Lx on port 0x%016Lx on " | |
4093 | "adapter %s", | |
4094 | unit->fcp_lun, | |
4095 | unit->port->wwpn, | |
4096 | zfcp_get_busid_by_unit(unit)); | |
4097 | /* dump SCSI CDB as prepared by zfcp */ | |
4098 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4099 | (char *) &fsf_req->qtcb-> | |
4100 | bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); | |
4101 | set_host_byte(&scpnt->result, DID_ERROR); | |
4102 | zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0); | |
4103 | goto skip_fsfstatus; | |
4104 | case RSP_CODE_RO_MISMATCH: | |
1da177e4 LT |
4105 | /* hardware bug */ |
4106 | ZFCP_LOG_NORMAL("bug: The FCP response code indicates " | |
4107 | "that conflicting values for the " | |
4108 | "fibrechannel payload offset from the " | |
4109 | "header were found. " | |
4110 | "The problem occured on unit 0x%016Lx " | |
4111 | "on port 0x%016Lx on adapter %s.\n", | |
4112 | unit->fcp_lun, | |
4113 | unit->port->wwpn, | |
4114 | zfcp_get_busid_by_unit(unit)); | |
4115 | /* dump SCSI CDB as prepared by zfcp */ | |
4116 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4117 | (char *) &fsf_req->qtcb-> | |
4118 | bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); | |
4119 | zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0); | |
4120 | set_host_byte(&scpnt->result, DID_ERROR); | |
4121 | goto skip_fsfstatus; | |
4122 | default: | |
4123 | ZFCP_LOG_NORMAL("bug: An invalid FCP response " | |
4124 | "code was detected for a command. " | |
4125 | "The problem occured on the unit " | |
4126 | "0x%016Lx on port 0x%016Lx on " | |
4127 | "adapter %s (debug info 0x%x)\n", | |
4128 | unit->fcp_lun, | |
4129 | unit->port->wwpn, | |
4130 | zfcp_get_busid_by_unit(unit), | |
4131 | fcp_rsp_info[3]); | |
4132 | /* dump SCSI CDB as prepared by zfcp */ | |
4133 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, | |
4134 | (char *) &fsf_req->qtcb-> | |
4135 | bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE); | |
4136 | zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0); | |
4137 | set_host_byte(&scpnt->result, DID_ERROR); | |
6f71d9bc | 4138 | goto skip_fsfstatus; |
1da177e4 LT |
4139 | } |
4140 | } | |
4141 | ||
4142 | /* check for sense data */ | |
4143 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { | |
4144 | sns_len = FSF_FCP_RSP_SIZE - | |
4145 | sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; | |
4146 | ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n", | |
4147 | sns_len); | |
4148 | sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); | |
4149 | ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n", | |
4150 | SCSI_SENSE_BUFFERSIZE); | |
4151 | sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); | |
4152 | ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n", | |
4153 | scpnt->result); | |
4154 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, | |
4155 | (void *) &scpnt->cmnd, scpnt->cmd_len); | |
4156 | ||
4157 | ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n", | |
4158 | fcp_rsp_iu->fcp_sns_len); | |
4159 | memcpy(&scpnt->sense_buffer, | |
4160 | zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); | |
4161 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, | |
4162 | (void *) &scpnt->sense_buffer, sns_len); | |
4163 | } | |
4164 | ||
4165 | /* check for overrun */ | |
4166 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) { | |
4167 | ZFCP_LOG_INFO("A data overrun was detected for a command. " | |
4168 | "unit 0x%016Lx, port 0x%016Lx, adapter %s. " | |
4169 | "The response data length is " | |
4170 | "%d, the original length was %d.\n", | |
4171 | unit->fcp_lun, | |
4172 | unit->port->wwpn, | |
4173 | zfcp_get_busid_by_unit(unit), | |
4174 | fcp_rsp_iu->fcp_resid, | |
4175 | (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); | |
4176 | } | |
4177 | ||
4178 | /* check for underrun */ | |
4179 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { | |
4180 | ZFCP_LOG_INFO("A data underrun was detected for a command. " | |
4181 | "unit 0x%016Lx, port 0x%016Lx, adapter %s. " | |
4182 | "The response data length is " | |
4183 | "%d, the original length was %d.\n", | |
4184 | unit->fcp_lun, | |
4185 | unit->port->wwpn, | |
4186 | zfcp_get_busid_by_unit(unit), | |
4187 | fcp_rsp_iu->fcp_resid, | |
4188 | (int) zfcp_get_fcp_dl(fcp_cmnd_iu)); | |
4189 | ||
4190 | scpnt->resid = fcp_rsp_iu->fcp_resid; | |
4191 | if (scpnt->request_bufflen - scpnt->resid < scpnt->underflow) | |
6f71d9bc | 4192 | set_host_byte(&scpnt->result, DID_ERROR); |
1da177e4 LT |
4193 | } |
4194 | ||
4195 | skip_fsfstatus: | |
4196 | ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result); | |
4197 | ||
4198 | zfcp_cmd_dbf_event_scsi("response", scpnt); | |
4199 | ||
4200 | /* cleanup pointer (need this especially for abort) */ | |
4201 | scpnt->host_scribble = NULL; | |
4202 | ||
4203 | /* | |
4204 | * NOTE: | |
4205 | * according to the outcome of a discussion on linux-scsi we | |
4206 | * don't need to grab the io_request_lock here since we use | |
4207 | * the new eh | |
4208 | */ | |
4209 | /* always call back */ | |
4210 | ||
4211 | (scpnt->scsi_done) (scpnt); | |
4212 | ||
4213 | /* | |
4214 | * We must hold this lock until scsi_done has been called. | |
4215 | * Otherwise we may call scsi_done after abort regarding this | |
4216 | * command has completed. | |
4217 | * Note: scsi_done must not block! | |
4218 | */ | |
4219 | out: | |
4220 | read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); | |
4221 | return retval; | |
4222 | } | |
4223 | ||
4224 | /* | |
4225 | * function: zfcp_fsf_send_fcp_command_task_management_handler | |
4226 | * | |
4227 | * purpose: evaluates FCP_RSP IU | |
4228 | * | |
4229 | * returns: | |
4230 | */ | |
4231 | static int | |
4232 | zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) | |
4233 | { | |
4234 | int retval = 0; | |
4235 | struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) | |
4236 | &(fsf_req->qtcb->bottom.io.fcp_rsp); | |
4237 | char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu); | |
4238 | struct zfcp_unit *unit = | |
4239 | fsf_req->data.send_fcp_command_task_management.unit; | |
4240 | ||
4241 | del_timer(&fsf_req->adapter->scsi_er_timer); | |
4242 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
4243 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; | |
4244 | goto skip_fsfstatus; | |
4245 | } | |
4246 | ||
4247 | /* check FCP_RSP_INFO */ | |
4248 | switch (fcp_rsp_info[3]) { | |
4249 | case RSP_CODE_GOOD: | |
1da177e4 LT |
4250 | /* ok, continue */ |
4251 | ZFCP_LOG_DEBUG("no failure or Task Management " | |
4252 | "Function complete\n"); | |
4253 | break; | |
4254 | case RSP_CODE_TASKMAN_UNSUPP: | |
1da177e4 LT |
4255 | ZFCP_LOG_NORMAL("bug: A reuested task management function " |
4256 | "is not supported on the target device " | |
4257 | "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ", | |
4258 | unit->fcp_lun, | |
4259 | unit->port->wwpn, | |
4260 | zfcp_get_busid_by_unit(unit)); | |
4261 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; | |
4262 | break; | |
4263 | case RSP_CODE_TASKMAN_FAILED: | |
1da177e4 LT |
4264 | ZFCP_LOG_NORMAL("bug: A reuested task management function " |
4265 | "failed to complete successfully. " | |
4266 | "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n", | |
4267 | unit->fcp_lun, | |
4268 | unit->port->wwpn, | |
4269 | zfcp_get_busid_by_unit(unit)); | |
4270 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; | |
4271 | break; | |
4272 | default: | |
4273 | ZFCP_LOG_NORMAL("bug: An invalid FCP response " | |
4274 | "code was detected for a command. " | |
4275 | "unit 0x%016Lx, port 0x%016Lx, adapter %s " | |
4276 | "(debug info 0x%x)\n", | |
4277 | unit->fcp_lun, | |
4278 | unit->port->wwpn, | |
4279 | zfcp_get_busid_by_unit(unit), | |
4280 | fcp_rsp_info[3]); | |
4281 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; | |
4282 | } | |
4283 | ||
4284 | skip_fsfstatus: | |
4285 | return retval; | |
4286 | } | |
4287 | ||
4288 | ||
4289 | /* | |
4290 | * function: zfcp_fsf_control_file | |
4291 | * | |
4292 | * purpose: Initiator of the control file upload/download FSF requests | |
4293 | * | |
4294 | * returns: 0 - FSF request is successfuly created and queued | |
4295 | * -EOPNOTSUPP - The FCP adapter does not have Control File support | |
4296 | * -EINVAL - Invalid direction specified | |
4297 | * -ENOMEM - Insufficient memory | |
4298 | * -EPERM - Cannot create FSF request or place it in QDIO queue | |
4299 | */ | |
4300 | int | |
4301 | zfcp_fsf_control_file(struct zfcp_adapter *adapter, | |
4302 | struct zfcp_fsf_req **fsf_req_ptr, | |
4303 | u32 fsf_command, | |
4304 | u32 option, | |
4305 | struct zfcp_sg_list *sg_list) | |
4306 | { | |
4307 | struct zfcp_fsf_req *fsf_req; | |
4308 | struct fsf_qtcb_bottom_support *bottom; | |
4309 | volatile struct qdio_buffer_element *sbale; | |
4310 | struct timer_list *timer; | |
4311 | unsigned long lock_flags; | |
4312 | int req_flags = 0; | |
4313 | int direction; | |
4314 | int retval = 0; | |
4315 | ||
4316 | if (!(adapter->supported_features & FSF_FEATURE_CFDC)) { | |
4317 | ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n", | |
4318 | zfcp_get_busid_by_adapter(adapter)); | |
4319 | retval = -EOPNOTSUPP; | |
4320 | goto out; | |
4321 | } | |
4322 | ||
4323 | switch (fsf_command) { | |
4324 | ||
4325 | case FSF_QTCB_DOWNLOAD_CONTROL_FILE: | |
4326 | direction = SBAL_FLAGS0_TYPE_WRITE; | |
4327 | if ((option != FSF_CFDC_OPTION_FULL_ACCESS) && | |
4328 | (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS)) | |
4329 | req_flags = ZFCP_WAIT_FOR_SBAL; | |
4330 | break; | |
4331 | ||
4332 | case FSF_QTCB_UPLOAD_CONTROL_FILE: | |
4333 | direction = SBAL_FLAGS0_TYPE_READ; | |
4334 | break; | |
4335 | ||
4336 | default: | |
4337 | ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command); | |
4338 | retval = -EINVAL; | |
4339 | goto out; | |
4340 | } | |
4341 | ||
4342 | timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL); | |
4343 | if (!timer) { | |
4344 | retval = -ENOMEM; | |
4345 | goto out; | |
4346 | } | |
4347 | ||
4348 | retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags, | |
4349 | NULL, &lock_flags, &fsf_req); | |
4350 | if (retval < 0) { | |
4351 | ZFCP_LOG_INFO("error: Could not create FSF request for the " | |
4352 | "adapter %s\n", | |
4353 | zfcp_get_busid_by_adapter(adapter)); | |
4354 | retval = -EPERM; | |
4355 | goto unlock_queue_lock; | |
4356 | } | |
4357 | ||
4358 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
4359 | sbale[0].flags |= direction; | |
4360 | ||
4361 | bottom = &fsf_req->qtcb->bottom.support; | |
4362 | bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; | |
4363 | bottom->option = option; | |
4364 | ||
4365 | if (sg_list->count > 0) { | |
4366 | int bytes; | |
4367 | ||
4368 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, | |
4369 | sg_list->sg, sg_list->count, | |
4370 | ZFCP_MAX_SBALS_PER_REQ); | |
4371 | if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) { | |
4372 | ZFCP_LOG_INFO( | |
4373 | "error: Could not create sufficient number of " | |
4374 | "SBALS for an FSF request to the adapter %s\n", | |
4375 | zfcp_get_busid_by_adapter(adapter)); | |
4376 | retval = -ENOMEM; | |
4377 | goto free_fsf_req; | |
4378 | } | |
4379 | } else | |
4380 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
4381 | ||
4382 | init_timer(timer); | |
4383 | timer->function = zfcp_fsf_request_timeout_handler; | |
4384 | timer->data = (unsigned long) adapter; | |
4385 | timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; | |
4386 | ||
4387 | retval = zfcp_fsf_req_send(fsf_req, timer); | |
4388 | if (retval < 0) { | |
4389 | ZFCP_LOG_INFO("initiation of cfdc up/download failed" | |
4390 | "(adapter %s)\n", | |
4391 | zfcp_get_busid_by_adapter(adapter)); | |
4392 | retval = -EPERM; | |
4393 | goto free_fsf_req; | |
4394 | } | |
4395 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); | |
4396 | ||
4397 | ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the " | |
4398 | "adapter %s\n", | |
4399 | fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ? | |
4400 | "download" : "upload", | |
4401 | zfcp_get_busid_by_adapter(adapter)); | |
4402 | ||
4403 | wait_event(fsf_req->completion_wq, | |
4404 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
4405 | ||
4406 | *fsf_req_ptr = fsf_req; | |
4407 | del_timer_sync(timer); | |
4408 | goto free_timer; | |
4409 | ||
4410 | free_fsf_req: | |
4411 | zfcp_fsf_req_free(fsf_req); | |
4412 | unlock_queue_lock: | |
4413 | write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); | |
4414 | free_timer: | |
4415 | kfree(timer); | |
4416 | out: | |
4417 | return retval; | |
4418 | } | |
4419 | ||
4420 | ||
4421 | /* | |
4422 | * function: zfcp_fsf_control_file_handler | |
4423 | * | |
4424 | * purpose: Handler of the control file upload/download FSF requests | |
4425 | * | |
4426 | * returns: 0 - FSF request successfuly processed | |
4427 | * -EAGAIN - Operation has to be repeated because of a temporary problem | |
4428 | * -EACCES - There is no permission to execute an operation | |
4429 | * -EPERM - The control file is not in a right format | |
4430 | * -EIO - There is a problem with the FCP adapter | |
4431 | * -EINVAL - Invalid operation | |
4432 | * -EFAULT - User space memory I/O operation fault | |
4433 | */ | |
4434 | static int | |
4435 | zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) | |
4436 | { | |
4437 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
4438 | struct fsf_qtcb_header *header = &fsf_req->qtcb->header; | |
4439 | struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support; | |
4440 | int retval = 0; | |
4441 | ||
4442 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
4443 | retval = -EINVAL; | |
4444 | goto skip_fsfstatus; | |
4445 | } | |
4446 | ||
4447 | switch (header->fsf_status) { | |
4448 | ||
4449 | case FSF_GOOD: | |
1da177e4 LT |
4450 | ZFCP_LOG_NORMAL( |
4451 | "The FSF request has been successfully completed " | |
4452 | "on the adapter %s\n", | |
4453 | zfcp_get_busid_by_adapter(adapter)); | |
4454 | break; | |
4455 | ||
4456 | case FSF_OPERATION_PARTIALLY_SUCCESSFUL: | |
1da177e4 LT |
4457 | if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) { |
4458 | switch (header->fsf_status_qual.word[0]) { | |
4459 | ||
6f71d9bc JB |
4460 | case FSF_SQ_CFDC_HARDENED_ON_SE: |
4461 | ZFCP_LOG_NORMAL( | |
4462 | "CFDC on the adapter %s has being " | |
4463 | "hardened on primary and secondary SE\n", | |
4464 | zfcp_get_busid_by_adapter(adapter)); | |
4465 | break; | |
4466 | ||
1da177e4 LT |
4467 | case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE: |
4468 | ZFCP_LOG_NORMAL( | |
4469 | "CFDC of the adapter %s could not " | |
4470 | "be saved on the SE\n", | |
4471 | zfcp_get_busid_by_adapter(adapter)); | |
4472 | break; | |
4473 | ||
4474 | case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2: | |
4475 | ZFCP_LOG_NORMAL( | |
4476 | "CFDC of the adapter %s could not " | |
4477 | "be copied to the secondary SE\n", | |
4478 | zfcp_get_busid_by_adapter(adapter)); | |
4479 | break; | |
4480 | ||
4481 | default: | |
4482 | ZFCP_LOG_NORMAL( | |
4483 | "CFDC could not be hardened " | |
4484 | "on the adapter %s\n", | |
4485 | zfcp_get_busid_by_adapter(adapter)); | |
4486 | } | |
4487 | } | |
4488 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4489 | retval = -EAGAIN; | |
4490 | break; | |
4491 | ||
4492 | case FSF_AUTHORIZATION_FAILURE: | |
1da177e4 LT |
4493 | ZFCP_LOG_NORMAL( |
4494 | "Adapter %s does not accept privileged commands\n", | |
4495 | zfcp_get_busid_by_adapter(adapter)); | |
4496 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4497 | retval = -EACCES; | |
4498 | break; | |
4499 | ||
4500 | case FSF_CFDC_ERROR_DETECTED: | |
1da177e4 LT |
4501 | ZFCP_LOG_NORMAL( |
4502 | "Error at position %d in the CFDC, " | |
4503 | "CFDC is discarded by the adapter %s\n", | |
4504 | header->fsf_status_qual.word[0], | |
4505 | zfcp_get_busid_by_adapter(adapter)); | |
4506 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4507 | retval = -EPERM; | |
4508 | break; | |
4509 | ||
4510 | case FSF_CONTROL_FILE_UPDATE_ERROR: | |
1da177e4 LT |
4511 | ZFCP_LOG_NORMAL( |
4512 | "Adapter %s cannot harden the control file, " | |
4513 | "file is discarded\n", | |
4514 | zfcp_get_busid_by_adapter(adapter)); | |
4515 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4516 | retval = -EIO; | |
4517 | break; | |
4518 | ||
4519 | case FSF_CONTROL_FILE_TOO_LARGE: | |
1da177e4 LT |
4520 | ZFCP_LOG_NORMAL( |
4521 | "Control file is too large, file is discarded " | |
4522 | "by the adapter %s\n", | |
4523 | zfcp_get_busid_by_adapter(adapter)); | |
4524 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4525 | retval = -EIO; | |
4526 | break; | |
4527 | ||
4528 | case FSF_ACCESS_CONFLICT_DETECTED: | |
1da177e4 LT |
4529 | if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) |
4530 | ZFCP_LOG_NORMAL( | |
4531 | "CFDC has been discarded by the adapter %s, " | |
4532 | "because activation would impact " | |
4533 | "%d active connection(s)\n", | |
4534 | zfcp_get_busid_by_adapter(adapter), | |
4535 | header->fsf_status_qual.word[0]); | |
4536 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4537 | retval = -EIO; | |
4538 | break; | |
4539 | ||
4540 | case FSF_CONFLICTS_OVERRULED: | |
1da177e4 LT |
4541 | if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) |
4542 | ZFCP_LOG_NORMAL( | |
4543 | "CFDC has been activated on the adapter %s, " | |
4544 | "but activation has impacted " | |
4545 | "%d active connection(s)\n", | |
4546 | zfcp_get_busid_by_adapter(adapter), | |
4547 | header->fsf_status_qual.word[0]); | |
4548 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4549 | retval = -EIO; | |
4550 | break; | |
4551 | ||
4552 | case FSF_UNKNOWN_OP_SUBTYPE: | |
1da177e4 LT |
4553 | ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, " |
4554 | "op_subtype=0x%x)\n", | |
4555 | zfcp_get_busid_by_adapter(adapter), | |
4556 | bottom->operation_subtype); | |
4557 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4558 | retval = -EINVAL; | |
4559 | break; | |
4560 | ||
4561 | case FSF_INVALID_COMMAND_OPTION: | |
1da177e4 LT |
4562 | ZFCP_LOG_NORMAL( |
4563 | "Invalid option 0x%x has been specified " | |
4564 | "in QTCB bottom sent to the adapter %s\n", | |
4565 | bottom->option, | |
4566 | zfcp_get_busid_by_adapter(adapter)); | |
4567 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4568 | retval = -EINVAL; | |
4569 | break; | |
4570 | ||
4571 | default: | |
4572 | ZFCP_LOG_NORMAL( | |
4573 | "bug: An unknown/unexpected FSF status 0x%08x " | |
4574 | "was presented on the adapter %s\n", | |
4575 | header->fsf_status, | |
4576 | zfcp_get_busid_by_adapter(adapter)); | |
4577 | debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval"); | |
4578 | debug_exception(fsf_req->adapter->erp_dbf, 0, | |
4579 | &header->fsf_status_qual.word[0], sizeof(u32)); | |
4580 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
4581 | retval = -EINVAL; | |
4582 | break; | |
4583 | } | |
4584 | ||
4585 | skip_fsfstatus: | |
4586 | return retval; | |
4587 | } | |
4588 | ||
4589 | ||
4590 | /* | |
4591 | * function: zfcp_fsf_req_wait_and_cleanup | |
4592 | * | |
4593 | * purpose: | |
4594 | * | |
4595 | * FIXME(design): signal seems to be <0 !!! | |
4596 | * returns: 0 - request completed (*status is valid), cleanup succ. | |
4597 | * <0 - request completed (*status is valid), cleanup failed | |
4598 | * >0 - signal which interrupted waiting (*status invalid), | |
4599 | * request not completed, no cleanup | |
4600 | * | |
4601 | * *status is a copy of status of completed fsf_req | |
4602 | */ | |
4603 | int | |
4604 | zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req, | |
4605 | int interruptible, u32 * status) | |
4606 | { | |
4607 | int retval = 0; | |
4608 | int signal = 0; | |
4609 | ||
4610 | if (interruptible) { | |
4611 | __wait_event_interruptible(fsf_req->completion_wq, | |
4612 | fsf_req->status & | |
4613 | ZFCP_STATUS_FSFREQ_COMPLETED, | |
4614 | signal); | |
4615 | if (signal) { | |
4616 | ZFCP_LOG_DEBUG("Caught signal %i while waiting for the " | |
4617 | "completion of the request at %p\n", | |
4618 | signal, fsf_req); | |
4619 | retval = signal; | |
4620 | goto out; | |
4621 | } | |
4622 | } else { | |
4623 | __wait_event(fsf_req->completion_wq, | |
4624 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
4625 | } | |
4626 | ||
4627 | *status = fsf_req->status; | |
4628 | ||
4629 | /* cleanup request */ | |
4630 | zfcp_fsf_req_cleanup(fsf_req); | |
4631 | out: | |
4632 | return retval; | |
4633 | } | |
4634 | ||
4635 | static inline int | |
4636 | zfcp_fsf_req_sbal_check(unsigned long *flags, | |
4637 | struct zfcp_qdio_queue *queue, int needed) | |
4638 | { | |
4639 | write_lock_irqsave(&queue->queue_lock, *flags); | |
4640 | if (likely(atomic_read(&queue->free_count) >= needed)) | |
4641 | return 1; | |
4642 | write_unlock_irqrestore(&queue->queue_lock, *flags); | |
4643 | return 0; | |
4644 | } | |
4645 | ||
4646 | /* | |
4647 | * set qtcb pointer in fsf_req and initialize QTCB | |
4648 | */ | |
4649 | static inline void | |
4650 | zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd) | |
4651 | { | |
4652 | if (likely(fsf_req->qtcb != NULL)) { | |
4653 | fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req; | |
4654 | fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; | |
4655 | fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd]; | |
4656 | fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; | |
4657 | fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req; | |
4658 | fsf_req->qtcb->header.fsf_command = fsf_cmd; | |
4659 | } | |
4660 | } | |
4661 | ||
4662 | /** | |
4663 | * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue | |
4664 | * @adapter: adapter for which request queue is examined | |
4665 | * @req_flags: flags indicating whether to wait for needed SBAL or not | |
4666 | * @lock_flags: lock_flags if queue_lock is taken | |
4667 | * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS | |
4668 | * Locks: lock adapter->request_queue->queue_lock on success | |
4669 | */ | |
4670 | static int | |
4671 | zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, | |
4672 | unsigned long *lock_flags) | |
4673 | { | |
4674 | long ret; | |
4675 | struct zfcp_qdio_queue *req_queue = &adapter->request_queue; | |
4676 | ||
4677 | if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { | |
4678 | ret = wait_event_interruptible_timeout(adapter->request_wq, | |
4679 | zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1), | |
4680 | ZFCP_SBAL_TIMEOUT); | |
4681 | if (ret < 0) | |
4682 | return ret; | |
4683 | if (!ret) | |
4684 | return -EIO; | |
4685 | } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1)) | |
4686 | return -EIO; | |
4687 | ||
4688 | return 0; | |
4689 | } | |
4690 | ||
4691 | /* | |
4692 | * function: zfcp_fsf_req_create | |
4693 | * | |
4694 | * purpose: create an FSF request at the specified adapter and | |
4695 | * setup common fields | |
4696 | * | |
4697 | * returns: -ENOMEM if there was insufficient memory for a request | |
4698 | * -EIO if no qdio buffers could be allocate to the request | |
4699 | * -EINVAL/-EPERM on bug conditions in req_dequeue | |
4700 | * 0 in success | |
4701 | * | |
4702 | * note: The created request is returned by reference. | |
4703 | * | |
4704 | * locks: lock of concerned request queue must not be held, | |
4705 | * but is held on completion (write, irqsave) | |
4706 | */ | |
4707 | int | |
4708 | zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, | |
4709 | mempool_t *pool, unsigned long *lock_flags, | |
4710 | struct zfcp_fsf_req **fsf_req_p) | |
4711 | { | |
4712 | volatile struct qdio_buffer_element *sbale; | |
4713 | struct zfcp_fsf_req *fsf_req = NULL; | |
4714 | int ret = 0; | |
4715 | struct zfcp_qdio_queue *req_queue = &adapter->request_queue; | |
4716 | ||
4717 | /* allocate new FSF request */ | |
4718 | fsf_req = zfcp_fsf_req_alloc(pool, req_flags); | |
4719 | if (unlikely(NULL == fsf_req)) { | |
4720 | ZFCP_LOG_DEBUG("error: Could not put an FSF request into" | |
4721 | "the outbound (send) queue.\n"); | |
4722 | ret = -ENOMEM; | |
4723 | goto failed_fsf_req; | |
4724 | } | |
4725 | ||
4726 | zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd); | |
4727 | ||
4728 | /* initialize waitqueue which may be used to wait on | |
4729 | this request completion */ | |
4730 | init_waitqueue_head(&fsf_req->completion_wq); | |
4731 | ||
4732 | ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); | |
4733 | if(ret < 0) { | |
4734 | goto failed_sbals; | |
4735 | } | |
4736 | ||
4737 | /* | |
4738 | * We hold queue_lock here. Check if QDIOUP is set and let request fail | |
4739 | * if it is not set (see also *_open_qdio and *_close_qdio). | |
4740 | */ | |
4741 | ||
4742 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { | |
4743 | write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags); | |
4744 | ret = -EIO; | |
4745 | goto failed_sbals; | |
4746 | } | |
4747 | ||
4748 | fsf_req->adapter = adapter; /* pointer to "parent" adapter */ | |
4749 | fsf_req->fsf_command = fsf_cmd; | |
4750 | fsf_req->sbal_number = 1; | |
4751 | fsf_req->sbal_first = req_queue->free_index; | |
4752 | fsf_req->sbal_curr = req_queue->free_index; | |
4753 | fsf_req->sbale_curr = 1; | |
4754 | ||
4755 | if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { | |
4756 | fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; | |
4757 | } | |
4758 | ||
4759 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); | |
4760 | ||
4761 | /* setup common SBALE fields */ | |
4762 | sbale[0].addr = fsf_req; | |
4763 | sbale[0].flags |= SBAL_FLAGS0_COMMAND; | |
4764 | if (likely(fsf_req->qtcb != NULL)) { | |
4765 | sbale[1].addr = (void *) fsf_req->qtcb; | |
4766 | sbale[1].length = sizeof(struct fsf_qtcb); | |
4767 | } | |
4768 | ||
4769 | ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n", | |
4770 | fsf_req->sbal_number, fsf_req->sbal_first); | |
4771 | ||
4772 | goto success; | |
4773 | ||
4774 | failed_sbals: | |
4775 | /* dequeue new FSF request previously enqueued */ | |
4776 | zfcp_fsf_req_free(fsf_req); | |
4777 | fsf_req = NULL; | |
4778 | ||
4779 | failed_fsf_req: | |
4780 | write_lock_irqsave(&req_queue->queue_lock, *lock_flags); | |
4781 | success: | |
4782 | *fsf_req_p = fsf_req; | |
4783 | return ret; | |
4784 | } | |
4785 | ||
4786 | /* | |
4787 | * function: zfcp_fsf_req_send | |
4788 | * | |
4789 | * purpose: start transfer of FSF request via QDIO | |
4790 | * | |
4791 | * returns: 0 - request transfer succesfully started | |
4792 | * !0 - start of request transfer failed | |
4793 | */ | |
4794 | static int | |
4795 | zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer) | |
4796 | { | |
4797 | struct zfcp_adapter *adapter; | |
4798 | struct zfcp_qdio_queue *req_queue; | |
4799 | volatile struct qdio_buffer_element *sbale; | |
4800 | int new_distance_from_int; | |
4801 | unsigned long flags; | |
4802 | int inc_seq_no = 1; | |
4803 | int retval = 0; | |
4804 | ||
4805 | adapter = fsf_req->adapter; | |
4806 | req_queue = &adapter->request_queue, | |
4807 | ||
4808 | ||
4809 | /* FIXME(debug): remove it later */ | |
4810 | sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0); | |
4811 | ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags); | |
4812 | ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n"); | |
4813 | ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr, | |
4814 | sbale[1].length); | |
4815 | ||
4816 | /* set sequence counter in QTCB */ | |
4817 | if (likely(fsf_req->qtcb)) { | |
4818 | fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; | |
4819 | fsf_req->seq_no = adapter->fsf_req_seq_no; | |
4820 | ZFCP_LOG_TRACE("FSF request %p of adapter %s gets " | |
4821 | "FSF sequence counter value of %i\n", | |
4822 | fsf_req, | |
4823 | zfcp_get_busid_by_adapter(adapter), | |
4824 | fsf_req->qtcb->prefix.req_seq_no); | |
4825 | } else | |
4826 | inc_seq_no = 0; | |
4827 | ||
4828 | /* put allocated FSF request at list tail */ | |
4829 | write_lock_irqsave(&adapter->fsf_req_list_lock, flags); | |
4830 | list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head); | |
4831 | write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); | |
4832 | ||
4833 | /* figure out expiration time of timeout and start timeout */ | |
4834 | if (unlikely(timer)) { | |
4835 | timer->expires += jiffies; | |
4836 | add_timer(timer); | |
4837 | } | |
4838 | ||
4839 | ZFCP_LOG_TRACE("request queue of adapter %s: " | |
4840 | "next free SBAL is %i, %i free SBALs\n", | |
4841 | zfcp_get_busid_by_adapter(adapter), | |
4842 | req_queue->free_index, | |
4843 | atomic_read(&req_queue->free_count)); | |
4844 | ||
4845 | ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, " | |
4846 | "index_in_queue=%i, count=%i, buffers=%p\n", | |
4847 | zfcp_get_busid_by_adapter(adapter), | |
4848 | QDIO_FLAG_SYNC_OUTPUT, | |
4849 | 0, fsf_req->sbal_first, fsf_req->sbal_number, | |
4850 | &req_queue->buffer[fsf_req->sbal_first]); | |
4851 | ||
4852 | /* | |
4853 | * adjust the number of free SBALs in request queue as well as | |
4854 | * position of first one | |
4855 | */ | |
4856 | atomic_sub(fsf_req->sbal_number, &req_queue->free_count); | |
4857 | ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count)); | |
4858 | req_queue->free_index += fsf_req->sbal_number; /* increase */ | |
4859 | req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap if needed */ | |
4860 | new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req); | |
4861 | ||
4862 | retval = do_QDIO(adapter->ccw_device, | |
4863 | QDIO_FLAG_SYNC_OUTPUT, | |
4864 | 0, fsf_req->sbal_first, fsf_req->sbal_number, NULL); | |
4865 | ||
4866 | if (unlikely(retval)) { | |
4867 | /* Queues are down..... */ | |
4868 | retval = -EIO; | |
4869 | /* | |
4870 | * FIXME(potential race): | |
4871 | * timer might be expired (absolutely unlikely) | |
4872 | */ | |
4873 | if (timer) | |
4874 | del_timer(timer); | |
4875 | write_lock_irqsave(&adapter->fsf_req_list_lock, flags); | |
4876 | list_del(&fsf_req->list); | |
4877 | write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); | |
4878 | /* | |
4879 | * adjust the number of free SBALs in request queue as well as | |
4880 | * position of first one | |
4881 | */ | |
4882 | zfcp_qdio_zero_sbals(req_queue->buffer, | |
4883 | fsf_req->sbal_first, fsf_req->sbal_number); | |
4884 | atomic_add(fsf_req->sbal_number, &req_queue->free_count); | |
4885 | req_queue->free_index -= fsf_req->sbal_number; /* increase */ | |
4886 | req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q; | |
4887 | req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */ | |
4888 | ZFCP_LOG_DEBUG | |
4889 | ("error: do_QDIO failed. Buffers could not be enqueued " | |
4890 | "to request queue.\n"); | |
4891 | } else { | |
4892 | req_queue->distance_from_int = new_distance_from_int; | |
4893 | /* | |
4894 | * increase FSF sequence counter - | |
4895 | * this must only be done for request successfully enqueued to | |
4896 | * QDIO this rejected requests may be cleaned up by calling | |
4897 | * routines resulting in missing sequence counter values | |
4898 | * otherwise, | |
4899 | */ | |
4900 | /* Don't increase for unsolicited status */ | |
4901 | if (likely(inc_seq_no)) { | |
4902 | adapter->fsf_req_seq_no++; | |
4903 | ZFCP_LOG_TRACE | |
4904 | ("FSF sequence counter value of adapter %s " | |
4905 | "increased to %i\n", | |
4906 | zfcp_get_busid_by_adapter(adapter), | |
4907 | adapter->fsf_req_seq_no); | |
4908 | } | |
4909 | /* count FSF requests pending */ | |
4910 | atomic_inc(&adapter->fsf_reqs_active); | |
4911 | } | |
4912 | return retval; | |
4913 | } | |
4914 | ||
4915 | /* | |
4916 | * function: zfcp_fsf_req_cleanup | |
4917 | * | |
4918 | * purpose: cleans up an FSF request and removes it from the specified list | |
4919 | * | |
4920 | * returns: | |
4921 | * | |
4922 | * assumption: no pending SB in SBALEs other than QTCB | |
4923 | */ | |
4924 | void | |
4925 | zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req) | |
4926 | { | |
4927 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
4928 | unsigned long flags; | |
4929 | ||
4930 | write_lock_irqsave(&adapter->fsf_req_list_lock, flags); | |
4931 | list_del(&fsf_req->list); | |
4932 | write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); | |
4933 | zfcp_fsf_req_free(fsf_req); | |
4934 | } | |
4935 | ||
4936 | #undef ZFCP_LOG_AREA |