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[SCSI] zfcp: consolidate sysfs things into one file.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4 1/*
553448f6 2 * zfcp device driver
1da177e4 3 *
553448f6 4 * Implementation of FSF commands.
1da177e4 5 *
553448f6 6 * Copyright IBM Corporation 2002, 2008
1da177e4
LT		 7 */
8
1da177e4
LT		 9#include "zfcp_ext.h"
10
11static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
12static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
13static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
14static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
15static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
16static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
17static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
18static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
19static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
20static int zfcp_fsf_send_fcp_command_task_management_handler(
21 struct zfcp_fsf_req *);
22static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
23static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
24static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
25static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
45633fdc 26static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
1da177e4
LT		 27static inline int zfcp_fsf_req_sbal_check(
28 unsigned long *, struct zfcp_qdio_queue *, int);
29static inline int zfcp_use_one_sbal(
30 struct scatterlist *, int, struct scatterlist *, int);
31static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
2abbe866 32static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
1da177e4
LT		 33static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
34static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
35static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
698ec016 36static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8,
aef4a983 37 struct fsf_link_down_info *);
1da177e4 38static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
1da177e4
LT		 39
40/* association between FSF command and FSF QTCB type */
41static u32 fsf_qtcb_type[] = {
42 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
43 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
52 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
53 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
55};
56
57static const char zfcp_act_subtable_type[5][8] = {
58 "unknown", "OS", "WWPN", "DID", "LUN"
59};
60
553448f6
CS		 61static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
62{
63 u16 subtable = (table & 0xffff0000) >> 16;
64 u16 rule = table & 0xffff;
65
66 if (subtable > 0 &&
67 subtable < ARRAY_SIZE(zfcp_act_subtable_type)) {
68 dev_warn(&adapter->ccw_device->dev,
69 "Access denied in subtable %s, rule %d.\n",
70 zfcp_act_subtable_type[subtable], rule);
71 }
72}
73
74static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
75 struct zfcp_port *port)
76{
77 struct fsf_qtcb_header *header = &req->qtcb->header;
78 dev_warn(&req->adapter->ccw_device->dev,
79 "Access denied, cannot send command to port 0x%016Lx.\n",
80 port->wwpn);
81 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
82 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
83 zfcp_erp_port_access_denied(port, 55, req);
84 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
85}
86
87static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
88 struct zfcp_unit *unit)
89{
90 struct fsf_qtcb_header *header = &req->qtcb->header;
91 dev_warn(&req->adapter->ccw_device->dev,
92 "Access denied for unit 0x%016Lx on port 0x%016Lx.\n",
93 unit->fcp_lun, unit->port->wwpn);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
95 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
96 zfcp_erp_unit_access_denied(unit, 59, req);
97 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
98}
99
100static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
101{
102 dev_err(&req->adapter->ccw_device->dev,
103 "Required FC class not supported by adapter, "
104 "shutting down adapter.\n");
105 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
106 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
107}
108
1da177e4
LT		 109/****************************************************************/
110/*************** FSF related Functions *************************/
111/****************************************************************/
112
1da177e4
LT		 113/*
114 * function: zfcp_fsf_req_alloc
115 *
41fa2ada 116 * purpose: Obtains an fsf_req and potentially a qtcb (for all but
1da177e4
LT		 117 * unsolicited requests) via helper functions
118 * Does some initial fsf request set-up.
41fa2ada 119 *
1da177e4
LT		 120 * returns: pointer to allocated fsf_req if successfull
121 * NULL otherwise
122 *
123 * locks: none
124 *
125 */
126static struct zfcp_fsf_req *
127zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
128{
129 size_t size;
130 void *ptr;
131 struct zfcp_fsf_req *fsf_req = NULL;
132
133 if (req_flags & ZFCP_REQ_NO_QTCB)
134 size = sizeof(struct zfcp_fsf_req);
135 else
dd52e0ea 136 size = sizeof(struct zfcp_fsf_req_qtcb);
1da177e4 137
dd52e0ea 138 if (likely(pool))
1da177e4 139 ptr = mempool_alloc(pool, GFP_ATOMIC);
dd52e0ea
HC		 140 else {
141 if (req_flags & ZFCP_REQ_NO_QTCB)
142 ptr = kmalloc(size, GFP_ATOMIC);
143 else
144 ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
54e6ecb2 145 GFP_ATOMIC);
dd52e0ea 146 }
1da177e4 147
dd52e0ea 148 if (unlikely(!ptr))
1da177e4
LT		 149 goto out;
150
151 memset(ptr, 0, size);
152
153 if (req_flags & ZFCP_REQ_NO_QTCB) {
154 fsf_req = (struct zfcp_fsf_req *) ptr;
155 } else {
dd52e0ea
HC		 156 fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
157 fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
1da177e4
LT		 158 }
159
160 fsf_req->pool = pool;
161
162 out:
163 return fsf_req;
164}
165
166/*
167 * function: zfcp_fsf_req_free
168 *
169 * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or
170 * returns it into the pool via helper functions.
171 *
172 * returns: sod all
173 *
174 * locks: none
175 */
1db2c9c0 176void
1da177e4
LT		 177zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
178{
dd52e0ea 179 if (likely(fsf_req->pool)) {
1da177e4 180 mempool_free(fsf_req, fsf_req->pool);
dd52e0ea
HC		 181 return;
182 }
183
184 if (fsf_req->qtcb) {
185 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
186 return;
187 }
188
189 kfree(fsf_req);
1da177e4
LT		 190}
191
869b2b44
MP		 192/*
193 * Never ever call this without shutting down the adapter first.
194 * Otherwise the adapter would continue using and corrupting s390 storage.
195 * Included BUG_ON() call to ensure this is done.
196 * ERP is supposed to be the only user of this function.
1da177e4 197 */
6fcc4711 198void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
1da177e4 199{
869b2b44 200 struct zfcp_fsf_req *fsf_req, *tmp;
fea9d6c7 201 unsigned long flags;
6fcc4711 202 LIST_HEAD(remove_queue);
869b2b44 203 unsigned int i;
fea9d6c7 204
869b2b44 205 BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
fea9d6c7 206 spin_lock_irqsave(&adapter->req_list_lock, flags);
869b2b44 207 for (i = 0; i < REQUEST_LIST_SIZE; i++)
6fcc4711 208 list_splice_init(&adapter->req_list[i], &remove_queue);
fea9d6c7
VS		 209 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
210
869b2b44
MP		 211 list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
212 list_del(&fsf_req->list);
213 fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
214 zfcp_fsf_req_complete(fsf_req);
6fcc4711 215 }
1da177e4
LT		 216}
217
218/*
219 * function: zfcp_fsf_req_complete
220 *
221 * purpose: Updates active counts and timers for openfcp-reqs
222 * May cleanup request after req_eval returns
223 *
224 * returns: 0 - success
225 * !0 - failure
226 *
41fa2ada 227 * context:
1da177e4
LT		 228 */
229int
230zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
231{
232 int retval = 0;
233 int cleanup;
1da177e4
LT		 234
235 if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
1da177e4
LT		 236 /*
237 * Note: all cleanup handling is done in the callchain of
238 * the function call-chain below.
239 */
240 zfcp_fsf_status_read_handler(fsf_req);
241 goto out;
2abbe866
AH		 242 } else {
243 del_timer(&fsf_req->timer);
1da177e4 244 zfcp_fsf_protstatus_eval(fsf_req);
2abbe866 245 }
1da177e4
LT		 246
247 /*
41fa2ada
SS		 248 * fsf_req may be deleted due to waking up functions, so
249 * cleanup is saved here and used later
1da177e4
LT		 250 */
251 if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
252 cleanup = 1;
253 else
254 cleanup = 0;
255
256 fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
257
258 /* cleanup request if requested by initiator */
259 if (likely(cleanup)) {
1da177e4
LT		 260 /*
261 * lock must not be held here since it will be
262 * grabed by the called routine, too
263 */
1db2c9c0 264 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 265 } else {
266 /* notify initiator waiting for the requests completion */
1da177e4
LT		 267 /*
268 * FIXME: Race! We must not access fsf_req here as it might have been
269 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
270 * flag. It's an improbable case. But, we have the same paranoia for
271 * the cleanup flag already.
272 * Might better be handled using complete()?
273 * (setting the flag and doing wakeup ought to be atomic
274 * with regard to checking the flag as long as waitqueue is
275 * part of the to be released structure)
276 */
277 wake_up(&fsf_req->completion_wq);
278 }
279
280 out:
281 return retval;
282}
283
284/*
285 * function: zfcp_fsf_protstatus_eval
286 *
287 * purpose: evaluates the QTCB of the finished FSF request
288 * and initiates appropriate actions
289 * (usually calling FSF command specific handlers)
290 *
41fa2ada 291 * returns:
1da177e4 292 *
41fa2ada 293 * context:
1da177e4
LT		 294 *
295 * locks:
296 */
297static int
298zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
299{
300 int retval = 0;
301 struct zfcp_adapter *adapter = fsf_req->adapter;
8a36e453
MS		 302 struct fsf_qtcb *qtcb = fsf_req->qtcb;
303 union fsf_prot_status_qual *prot_status_qual =
304 &qtcb->prefix.prot_status_qual;
1da177e4 305
8a36e453 306 zfcp_hba_dbf_event_fsf_response(fsf_req);
1da177e4
LT		 307
308 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
1da177e4
LT		 309 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
310 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
1da177e4
LT		 311 goto skip_protstatus;
312 }
313
1da177e4 314 /* evaluate FSF Protocol Status */
8a36e453 315 switch (qtcb->prefix.prot_status) {
1da177e4
LT		 316
317 case FSF_PROT_GOOD:
1da177e4 318 case FSF_PROT_FSF_STATUS_PRESENTED:
1da177e4
LT		 319 break;
320
321 case FSF_PROT_QTCB_VERSION_ERROR:
553448f6
CS		 322 dev_err(&adapter->ccw_device->dev,
323 "The QTCB version requested by zfcp (0x%x) is not "
324 "supported by the FCP adapter (lowest supported 0x%x, "
325 "highest supported 0x%x).\n",
326 ZFCP_QTCB_VERSION, prot_status_qual->word[0],
327 prot_status_qual->word[1]);
1f6f7129 328 zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req);
1da177e4
LT		 329 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
330 break;
331
332 case FSF_PROT_SEQ_NUMB_ERROR:
1f6f7129 333 zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req);
1da177e4
LT		 334 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
335 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
336 break;
337
338 case FSF_PROT_UNSUPP_QTCB_TYPE:
553448f6
CS		 339 dev_err(&adapter->ccw_device->dev,
340 "Packet header type used by the device driver is "
341 "incompatible with that used on the adapter.\n");
1f6f7129 342 zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req);
1da177e4
LT		 343 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
344 break;
345
346 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
1da177e4
LT		 347 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
348 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
349 &(adapter->status));
1da177e4
LT		 350 break;
351
352 case FSF_PROT_DUPLICATE_REQUEST_ID:
553448f6
CS		 353 dev_err(&adapter->ccw_device->dev,
354 "The request identifier 0x%Lx is ambiguous.\n",
355 (unsigned long long)qtcb->bottom.support.req_handle);
1f6f7129 356 zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req);
1da177e4
LT		 357 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
358 break;
359
360 case FSF_PROT_LINK_DOWN:
698ec016 361 zfcp_fsf_link_down_info_eval(fsf_req, 37,
aef4a983 362 &prot_status_qual->link_down_info);
9467a9b3 363 /* FIXME: reopening adapter now? better wait for link up */
1f6f7129 364 zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req);
1da177e4
LT		 365 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
366 break;
367
368 case FSF_PROT_REEST_QUEUE:
1da177e4 369 /* All ports should be marked as ready to run again */
1f6f7129
MP		 370 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
371 ZFCP_STATUS_COMMON_RUNNING,
1da177e4
LT		 372 ZFCP_SET);
373 zfcp_erp_adapter_reopen(adapter,
374 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
9467a9b3 375 | ZFCP_STATUS_COMMON_ERP_FAILED,
1f6f7129 376 99, fsf_req);
1da177e4
LT		 377 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
378 break;
379
380 case FSF_PROT_ERROR_STATE:
1f6f7129 381 zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req);
1da177e4
LT		 382 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
383 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
384 break;
385
386 default:
553448f6
CS		 387 dev_err(&adapter->ccw_device->dev,
388 "Transfer protocol status information"
389 "provided by the adapter (0x%x) "
390 "is not compatible with the device driver.\n",
391 qtcb->prefix.prot_status);
1f6f7129 392 zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req);
1da177e4
LT		 393 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
394 }
395
396 skip_protstatus:
397 /*
398 * always call specific handlers to give them a chance to do
399 * something meaningful even in error cases
400 */
401 zfcp_fsf_fsfstatus_eval(fsf_req);
402 return retval;
403}
404
405/*
406 * function: zfcp_fsf_fsfstatus_eval
407 *
408 * purpose: evaluates FSF status of completed FSF request
409 * and acts accordingly
410 *
411 * returns:
412 */
413static int
414zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
415{
416 int retval = 0;
417
418 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
419 goto skip_fsfstatus;
420 }
421
422 /* evaluate FSF Status */
423 switch (fsf_req->qtcb->header.fsf_status) {
424 case FSF_UNKNOWN_COMMAND:
553448f6
CS		 425 dev_err(&fsf_req->adapter->ccw_device->dev,
426 "Command issued by the device driver (0x%x) is "
427 "not known by the adapter.\n",
428 fsf_req->qtcb->header.fsf_command);
1f6f7129 429 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req);
1da177e4
LT		 430 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
431 break;
432
1da177e4 433 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 434 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
435 break;
1da177e4
LT		 436 }
437
438 skip_fsfstatus:
439 /*
440 * always call specific handlers to give them a chance to do
441 * something meaningful even in error cases
442 */
443 zfcp_fsf_req_dispatch(fsf_req);
444
445 return retval;
446}
447
448/*
449 * function: zfcp_fsf_fsfstatus_qual_eval
450 *
451 * purpose: evaluates FSF status-qualifier of completed FSF request
452 * and acts accordingly
453 *
454 * returns:
455 */
456static int
457zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
458{
459 int retval = 0;
460
461 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
462 case FSF_SQ_FCP_RSP_AVAILABLE:
1da177e4
LT		 463 break;
464 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4 465 /* The SCSI-stack may now issue retries or escalate */
1da177e4
LT		 466 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
467 break;
468 case FSF_SQ_COMMAND_ABORTED:
1da177e4 469 /* Carry the aborted state on to upper layer */
1da177e4
LT		 470 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
471 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
472 break;
473 case FSF_SQ_NO_RECOM:
553448f6
CS		 474 dev_err(&fsf_req->adapter->ccw_device->dev,
475 "No recommendation could be given for a "
476 "problem on the adapter.\n");
1f6f7129 477 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req);
1da177e4
LT		 478 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
479 break;
480 case FSF_SQ_ULP_PROGRAMMING_ERROR:
1da177e4
LT		 481 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
482 break;
483 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
484 case FSF_SQ_NO_RETRY_POSSIBLE:
485 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
486 /* dealt with in the respective functions */
487 break;
488 default:
1da177e4
LT		 489 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
490 break;
491 }
492
493 return retval;
494}
495
aef4a983
MS		 496/**
497 * zfcp_fsf_link_down_info_eval - evaluate link down information block
498 */
499static void
698ec016 500zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id,
aef4a983
MS		 501 struct fsf_link_down_info *link_down)
502{
698ec016
MP		 503 struct zfcp_adapter *adapter = fsf_req->adapter;
504
ee69ab7a
MS		 505 if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
506 &adapter->status))
507 return;
508
509 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
510
2f8f3ed5
AH		 511 if (link_down == NULL)
512 goto out;
ee69ab7a 513
aef4a983
MS		 514 switch (link_down->error_code) {
515 case FSF_PSQ_LINK_NO_LIGHT:
553448f6
CS		 516 dev_warn(&fsf_req->adapter->ccw_device->dev,
517 "The local link is down: "
518 "no light detected.\n");
aef4a983
MS		 519 break;
520 case FSF_PSQ_LINK_WRAP_PLUG:
553448f6
CS		 521 dev_warn(&fsf_req->adapter->ccw_device->dev,
522 "The local link is down: "
523 "wrap plug detected.\n");
aef4a983
MS		 524 break;
525 case FSF_PSQ_LINK_NO_FCP:
553448f6
CS		 526 dev_warn(&fsf_req->adapter->ccw_device->dev,
527 "The local link is down: "
528 "adjacent node on link does not support FCP.\n");
aef4a983
MS		 529 break;
530 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
553448f6
CS		 531 dev_warn(&fsf_req->adapter->ccw_device->dev,
532 "The local link is down: "
533 "firmware update in progress.\n");
534 break;
aef4a983 535 case FSF_PSQ_LINK_INVALID_WWPN:
553448f6
CS		 536 dev_warn(&fsf_req->adapter->ccw_device->dev,
537 "The local link is down: "
538 "duplicate or invalid WWPN detected.\n");
aef4a983
MS		 539 break;
540 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
553448f6
CS		 541 dev_warn(&fsf_req->adapter->ccw_device->dev,
542 "The local link is down: "
543 "no support for NPIV by Fabric.\n");
aef4a983
MS		 544 break;
545 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
553448f6
CS		 546 dev_warn(&fsf_req->adapter->ccw_device->dev,
547 "The local link is down: "
548 "out of resource in FCP daughtercard.\n");
aef4a983
MS		 549 break;
550 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
553448f6
CS		 551 dev_warn(&fsf_req->adapter->ccw_device->dev,
552 "The local link is down: "
553 "out of resource in Fabric.\n");
aef4a983
MS		 554 break;
555 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
553448f6
CS		 556 dev_warn(&fsf_req->adapter->ccw_device->dev,
557 "The local link is down: "
558 "unable to login to Fabric.\n");
aef4a983
MS		 559 break;
560 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
553448f6
CS		 561 dev_warn(&fsf_req->adapter->ccw_device->dev,
562 "WWPN assignment file corrupted on adapter.\n");
aef4a983
MS		 563 break;
564 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
553448f6
CS		 565 dev_warn(&fsf_req->adapter->ccw_device->dev,
566 "Mode table corrupted on adapter.\n");
aef4a983
MS		 567 break;
568 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
553448f6
CS		 569 dev_warn(&fsf_req->adapter->ccw_device->dev,
570 "No WWPN for assignment table on adapter.\n");
aef4a983
MS		 571 break;
572 default:
553448f6
CS		 573 dev_warn(&fsf_req->adapter->ccw_device->dev,
574 "The local link to adapter is down.\n");
aef4a983
MS		 575 }
576
2f8f3ed5 577 out:
1f6f7129 578 zfcp_erp_adapter_failed(adapter, id, fsf_req);
aef4a983
MS		 579}
580
1da177e4
LT		 581/*
582 * function: zfcp_fsf_req_dispatch
583 *
584 * purpose: calls the appropriate command specific handler
585 *
41fa2ada 586 * returns:
1da177e4
LT		 587 */
588static int
589zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
590{
591 struct zfcp_erp_action *erp_action = fsf_req->erp_action;
1da177e4
LT		 592 int retval = 0;
593
1da177e4
LT		 594
595 switch (fsf_req->fsf_command) {
596
597 case FSF_QTCB_FCP_CMND:
1da177e4
LT		 598 zfcp_fsf_send_fcp_command_handler(fsf_req);
599 break;
600
601 case FSF_QTCB_ABORT_FCP_CMND:
1da177e4
LT		 602 zfcp_fsf_abort_fcp_command_handler(fsf_req);
603 break;
604
605 case FSF_QTCB_SEND_GENERIC:
1da177e4
LT		 606 zfcp_fsf_send_ct_handler(fsf_req);
607 break;
608
609 case FSF_QTCB_OPEN_PORT_WITH_DID:
1da177e4
LT		 610 zfcp_fsf_open_port_handler(fsf_req);
611 break;
612
613 case FSF_QTCB_OPEN_LUN:
1da177e4
LT		 614 zfcp_fsf_open_unit_handler(fsf_req);
615 break;
616
617 case FSF_QTCB_CLOSE_LUN:
1da177e4
LT		 618 zfcp_fsf_close_unit_handler(fsf_req);
619 break;
620
621 case FSF_QTCB_CLOSE_PORT:
1da177e4
LT		 622 zfcp_fsf_close_port_handler(fsf_req);
623 break;
624
625 case FSF_QTCB_CLOSE_PHYSICAL_PORT:
1da177e4
LT		 626 zfcp_fsf_close_physical_port_handler(fsf_req);
627 break;
628
629 case FSF_QTCB_EXCHANGE_CONFIG_DATA:
1da177e4
LT		 630 zfcp_fsf_exchange_config_data_handler(fsf_req);
631 break;
632
633 case FSF_QTCB_EXCHANGE_PORT_DATA:
1da177e4
LT		 634 zfcp_fsf_exchange_port_data_handler(fsf_req);
635 break;
636
637 case FSF_QTCB_SEND_ELS:
1da177e4
LT		 638 zfcp_fsf_send_els_handler(fsf_req);
639 break;
640
641 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
1da177e4
LT		 642 zfcp_fsf_control_file_handler(fsf_req);
643 break;
644
645 case FSF_QTCB_UPLOAD_CONTROL_FILE:
1da177e4
LT		 646 zfcp_fsf_control_file_handler(fsf_req);
647 break;
1da177e4
LT		 648 }
649
650 if (!erp_action)
651 return retval;
652
1da177e4
LT		 653 zfcp_erp_async_handler(erp_action, 0);
654
655 return retval;
656}
657
658/*
659 * function: zfcp_fsf_status_read
660 *
661 * purpose: initiates a Status Read command at the specified adapter
662 *
663 * returns:
664 */
665int
666zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
667{
668 struct zfcp_fsf_req *fsf_req;
669 struct fsf_status_read_buffer *status_buffer;
670 unsigned long lock_flags;
671 volatile struct qdio_buffer_element *sbale;
b2141782 672 int retval;
1da177e4
LT		 673
674 /* setup new FSF request */
675 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
676 req_flags | ZFCP_REQ_NO_QTCB,
677 adapter->pool.fsf_req_status_read,
678 &lock_flags, &fsf_req);
553448f6 679 if (retval < 0)
1da177e4 680 goto failed_req_create;
1da177e4 681
00bab910 682 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 683 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
684 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
685 fsf_req->sbale_curr = 2;
686
b2141782 687 retval = -ENOMEM;
1da177e4
LT		 688 status_buffer =
689 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
b2141782 690 if (!status_buffer)
1da177e4 691 goto failed_buf;
1da177e4 692 memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
059c97d0 693 fsf_req->data = (unsigned long) status_buffer;
1da177e4
LT		 694
695 /* insert pointer to respective buffer */
696 sbale = zfcp_qdio_sbale_curr(fsf_req);
697 sbale->addr = (void *) status_buffer;
698 sbale->length = sizeof(struct fsf_status_read_buffer);
699
2abbe866 700 retval = zfcp_fsf_req_send(fsf_req);
553448f6 701 if (retval)
1da177e4 702 goto failed_req_send;
1da177e4 703
1da177e4
LT		 704 goto out;
705
706 failed_req_send:
707 mempool_free(status_buffer, adapter->pool.data_status_read);
708
709 failed_buf:
710 zfcp_fsf_req_free(fsf_req);
711 failed_req_create:
8a36e453 712 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
1da177e4 713 out:
00bab910 714 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4
LT		 715 return retval;
716}
717
718static int
719zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
720{
721 struct fsf_status_read_buffer *status_buffer;
722 struct zfcp_adapter *adapter;
723 struct zfcp_port *port;
724 unsigned long flags;
725
059c97d0 726 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 727 adapter = fsf_req->adapter;
728
729 read_lock_irqsave(&zfcp_data.config_lock, flags);
730 list_for_each_entry(port, &adapter->port_list_head, list)
731 if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
732 break;
733 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
734
553448f6 735 if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK)))
1da177e4 736 goto out;
1da177e4
LT		 737
738 switch (status_buffer->status_subtype) {
739
740 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
1f6f7129 741 zfcp_erp_port_reopen(port, 0, 101, fsf_req);
1da177e4
LT		 742 break;
743
744 case FSF_STATUS_READ_SUB_ERROR_PORT:
1f6f7129 745 zfcp_erp_port_shutdown(port, 0, 122, fsf_req);
1da177e4 746 break;
1da177e4
LT		 747 }
748 out:
749 return 0;
750}
751
553448f6
CS		 752static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req)
753{
754 struct zfcp_adapter *adapter = req->adapter;
755 struct fsf_status_read_buffer *buf =
756 (struct fsf_status_read_buffer *) req->data;
757 struct fsf_bit_error_payload *err =
758 (struct fsf_bit_error_payload *) buf->payload;
759 dev_warn(&adapter->ccw_device->dev,
760 "Warning: bit error threshold data "
761 "received for the adapter: "
762 "link failures = %i, loss of sync errors = %i, "
763 "loss of signal errors = %i, "
764 "primitive sequence errors = %i, "
765 "invalid transmission word errors = %i, "
766 "CRC errors = %i).\n",
767 err->link_failure_error_count,
768 err->loss_of_sync_error_count,
769 err->loss_of_signal_error_count,
770 err->primitive_sequence_error_count,
771 err->invalid_transmission_word_error_count,
772 err->crc_error_count);
773 dev_warn(&adapter->ccw_device->dev,
774 "Additional bit error threshold data of the adapter: "
775 "primitive sequence event time-outs = %i, "
776 "elastic buffer overrun errors = %i, "
777 "advertised receive buffer-to-buffer credit = %i, "
778 "current receice buffer-to-buffer credit = %i, "
779 "advertised transmit buffer-to-buffer credit = %i, "
780 "current transmit buffer-to-buffer credit = %i).\n",
781 err->primitive_sequence_event_timeout_count,
782 err->elastic_buffer_overrun_error_count,
783 err->advertised_receive_b2b_credit,
784 err->current_receive_b2b_credit,
785 err->advertised_transmit_b2b_credit,
786 err->current_transmit_b2b_credit);
787}
788
1da177e4
LT		 789/*
790 * function: zfcp_fsf_status_read_handler
791 *
792 * purpose: is called for finished Open Port command
793 *
41fa2ada 794 * returns:
1da177e4
LT		 795 */
796static int
797zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
798{
799 int retval = 0;
800 struct zfcp_adapter *adapter = fsf_req->adapter;
801 struct fsf_status_read_buffer *status_buffer =
059c97d0 802 (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 803
804 if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
8a36e453 805 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
1da177e4 806 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 807 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 808 goto out;
809 }
810
8a36e453
MS		 811 zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
812
1da177e4
LT		 813 switch (status_buffer->status_type) {
814
815 case FSF_STATUS_READ_PORT_CLOSED:
1da177e4
LT		 816 zfcp_fsf_status_read_port_closed(fsf_req);
817 break;
818
819 case FSF_STATUS_READ_INCOMING_ELS:
24073b47 820 zfcp_fc_incoming_els(fsf_req);
1da177e4
LT		 821 break;
822
823 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4
LT		 824 break;
825
826 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
553448f6 827 zfcp_fsf_bit_error_threshold(fsf_req);
1da177e4
LT		 828 break;
829
830 case FSF_STATUS_READ_LINK_DOWN:
aef4a983
MS		 831 switch (status_buffer->status_subtype) {
832 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
553448f6
CS		 833 dev_warn(&adapter->ccw_device->dev,
834 "Physical link is down.\n");
698ec016 835 zfcp_fsf_link_down_info_eval(fsf_req, 38,
ee69ab7a
MS		 836 (struct fsf_link_down_info *)
837 &status_buffer->payload);
aef4a983
MS		 838 break;
839 case FSF_STATUS_READ_SUB_FDISC_FAILED:
553448f6
CS		 840 dev_warn(&adapter->ccw_device->dev,
841 "Local link is down "
842 "due to failed FDISC login.\n");
698ec016 843 zfcp_fsf_link_down_info_eval(fsf_req, 39,
ee69ab7a
MS		 844 (struct fsf_link_down_info *)
845 &status_buffer->payload);
aef4a983
MS		 846 break;
847 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
553448f6
CS		 848 dev_warn(&adapter->ccw_device->dev,
849 "Local link is down "
850 "due to firmware update on adapter.\n");
698ec016 851 zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL);
aef4a983
MS		 852 break;
853 default:
553448f6
CS		 854 dev_warn(&adapter->ccw_device->dev,
855 "Local link is down.\n");
698ec016 856 zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL);
aef4a983 857 };
1da177e4
LT		 858 break;
859
860 case FSF_STATUS_READ_LINK_UP:
553448f6
CS		 861 dev_info(&adapter->ccw_device->dev,
862 "Local link was replugged.\n");
1da177e4 863 /* All ports should be marked as ready to run again */
1f6f7129 864 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
1da177e4
LT		 865 ZFCP_STATUS_COMMON_RUNNING,
866 ZFCP_SET);
867 zfcp_erp_adapter_reopen(adapter,
868 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
9467a9b3 869 | ZFCP_STATUS_COMMON_ERP_FAILED,
1f6f7129 870 102, fsf_req);
1da177e4
LT		 871 break;
872
9eb69aff 873 case FSF_STATUS_READ_NOTIFICATION_LOST:
9eb69aff
MS		 874 if (status_buffer->status_subtype &
875 FSF_STATUS_READ_SUB_ACT_UPDATED)
1f6f7129 876 zfcp_erp_adapter_access_changed(adapter, 135, fsf_req);
cc8c2829
SS		 877 if (status_buffer->status_subtype &
878 FSF_STATUS_READ_SUB_INCOMING_ELS)
879 schedule_work(&adapter->scan_work);
9eb69aff
MS		 880 break;
881
1da177e4 882 case FSF_STATUS_READ_CFDC_UPDATED:
1f6f7129 883 zfcp_erp_adapter_access_changed(adapter, 136, fsf_req);
1da177e4
LT		 884 break;
885
aef4a983 886 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
aef4a983
MS		 887 adapter->adapter_features = *(u32*) status_buffer->payload;
888 break;
1da177e4
LT		 889 }
890 mempool_free(status_buffer, adapter->pool.data_status_read);
1db2c9c0 891 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 892 /*
893 * recycle buffer and start new request repeat until outbound
894 * queue is empty or adapter shutdown is requested
895 */
896 /*
897 * FIXME(qdio):
898 * we may wait in the req_create for 5s during shutdown, so
899 * qdio_cleanup will have to wait at least that long before returning
900 * with failure to allow us a proper cleanup under all circumstances
901 */
902 /*
903 * FIXME:
904 * allocation failure possible? (Is this code needed?)
905 */
d26ab06e
SS		 906
907 atomic_inc(&adapter->stat_miss);
908 schedule_work(&adapter->stat_work);
1da177e4
LT		 909 out:
910 return retval;
911}
912
913/*
914 * function: zfcp_fsf_abort_fcp_command
915 *
916 * purpose: tells FSF to abort a running SCSI command
917 *
918 * returns: address of initiated FSF request
919 * NULL - request could not be initiated
920 *
41fa2ada 921 * FIXME(design): should be watched by a timeout !!!
1da177e4
LT		 922 * FIXME(design) shouldn't this be modified to return an int
923 * also...don't know how though
924 */
925struct zfcp_fsf_req *
926zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
927 struct zfcp_adapter *adapter,
928 struct zfcp_unit *unit, int req_flags)
929{
930 volatile struct qdio_buffer_element *sbale;
1da177e4 931 struct zfcp_fsf_req *fsf_req = NULL;
2abbe866 932 unsigned long lock_flags;
1da177e4
LT		 933 int retval = 0;
934
935 /* setup new FSF request */
936 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
937 req_flags, adapter->pool.fsf_req_abort,
938 &lock_flags, &fsf_req);
553448f6 939 if (retval < 0)
1da177e4 940 goto out;
1da177e4 941
951f746f
CS		 942 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
943 &unit->status)))
944 goto unit_blocked;
945
00bab910 946 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 947 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
948 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
949
059c97d0 950 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 951
952 /* set handles of unit and its parent port in QTCB */
953 fsf_req->qtcb->header.lun_handle = unit->handle;
954 fsf_req->qtcb->header.port_handle = unit->port->handle;
955
956 /* set handle of request which should be aborted */
957 fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
958
2abbe866
AH		 959 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
960 retval = zfcp_fsf_req_send(fsf_req);
951f746f
CS		 961 if (!retval)
962 goto out;
963
964 unit_blocked:
1da177e4
LT		 965 zfcp_fsf_req_free(fsf_req);
966 fsf_req = NULL;
1da177e4 967
1da177e4 968 out:
00bab910 969 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4
LT		 970 return fsf_req;
971}
972
973/*
974 * function: zfcp_fsf_abort_fcp_command_handler
975 *
976 * purpose: is called for finished Abort FCP Command request
977 *
41fa2ada 978 * returns:
1da177e4
LT		 979 */
980static int
981zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
982{
983 int retval = -EINVAL;
059c97d0 984 struct zfcp_unit *unit;
8627533c
CS		 985 union fsf_status_qual *fsf_stat_qual =
986 &new_fsf_req->qtcb->header.fsf_status_qual;
1da177e4 987
1da177e4
LT		 988 if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
989 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
990 goto skip_fsfstatus;
991 }
992
059c97d0
AH		 993 unit = (struct zfcp_unit *) new_fsf_req->data;
994
1da177e4
LT		 995 /* evaluate FSF status in QTCB */
996 switch (new_fsf_req->qtcb->header.fsf_status) {
997
998 case FSF_PORT_HANDLE_NOT_VALID:
8627533c 999 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1da177e4
LT		 1000 /*
1001 * In this case a command that was sent prior to a port
1002 * reopen was aborted (handles are different). This is
1003 * fine.
1004 */
1005 } else {
1da177e4 1006 /* Let's hope this sorts out the mess */
9467a9b3 1007 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
1f6f7129 1008 new_fsf_req);
1da177e4
LT		 1009 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1010 }
1011 break;
1012
1013 case FSF_LUN_HANDLE_NOT_VALID:
8627533c 1014 if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
1da177e4
LT		 1015 /*
1016 * In this case a command that was sent prior to a unit
1017 * reopen was aborted (handles are different).
1018 * This is fine.
1019 */
1020 } else {
1da177e4 1021 /* Let's hope this sorts out the mess */
1f6f7129 1022 zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req);
1da177e4
LT		 1023 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1024 }
1025 break;
1026
1027 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1da177e4 1028 retval = 0;
1da177e4
LT		 1029 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1030 break;
1031
1032 case FSF_PORT_BOXED:
1f6f7129 1033 zfcp_erp_port_boxed(unit->port, 47, new_fsf_req);
1da177e4
LT		 1034 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1035 | ZFCP_STATUS_FSFREQ_RETRY;
1036 break;
1037
1038 case FSF_LUN_BOXED:
1f6f7129 1039 zfcp_erp_unit_boxed(unit, 48, new_fsf_req);
1da177e4
LT		 1040 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1041 | ZFCP_STATUS_FSFREQ_RETRY;
1042 break;
1043
1044 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1045 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1046 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1047 zfcp_test_link(unit->port);
1da177e4
LT		 1048 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1049 break;
1050 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1051 /* SCSI stack will escalate */
1da177e4
LT		 1052 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1053 break;
1da177e4
LT		 1054 }
1055 break;
1056
1057 case FSF_GOOD:
1da177e4
LT		 1058 retval = 0;
1059 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1060 break;
1da177e4
LT		 1061 }
1062 skip_fsfstatus:
1063 return retval;
1064}
1065
1066/**
1067 * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1068 * one SBALE
1069 * Two scatter-gather lists are passed, one for the reqeust and one for the
1070 * response.
1071 */
1072static inline int
1073zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1074 struct scatterlist *resp, int resp_count)
1075{
1076 return ((req_count == 1) &&
1077 (resp_count == 1) &&
1078 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1079 PAGE_MASK) ==
1080 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1081 req[0].length - 1) & PAGE_MASK)) &&
1082 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1083 PAGE_MASK) ==
1084 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1085 resp[0].length - 1) & PAGE_MASK)));
1086}
1087
1088/**
1089 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1090 * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1091 * the request
1092 * @pool: pointer to memory pool, if non-null this pool is used to allocate
1093 * a struct zfcp_fsf_req
1094 * @erp_action: pointer to erp_action, if non-null the Generic Service request
1095 * is sent within error recovery
1096 */
1097int
1098zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1099 struct zfcp_erp_action *erp_action)
1100{
1101 volatile struct qdio_buffer_element *sbale;
1102 struct zfcp_port *port;
1103 struct zfcp_adapter *adapter;
1104 struct zfcp_fsf_req *fsf_req;
1105 unsigned long lock_flags;
1106 int bytes;
1107 int ret = 0;
1108
1109 port = ct->port;
1110 adapter = port->adapter;
1111
1112 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1113 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1114 pool, &lock_flags, &fsf_req);
553448f6 1115 if (ret < 0)
1da177e4 1116 goto failed_req;
1da177e4 1117
00bab910 1118 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 1119 if (zfcp_use_one_sbal(ct->req, ct->req_count,
1120 ct->resp, ct->resp_count)){
1121 /* both request buffer and response buffer
1122 fit into one sbale each */
1123 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1124 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1125 sbale[2].length = ct->req[0].length;
1126 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1127 sbale[3].length = ct->resp[0].length;
1128 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1129 } else if (adapter->adapter_features &
1da177e4
LT		 1130 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1131 /* try to use chained SBALs */
1132 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1133 SBAL_FLAGS0_TYPE_WRITE_READ,
00bab910 1134 ct->req,
1da177e4
LT		 1135 ZFCP_MAX_SBALS_PER_CT_REQ);
1136 if (bytes <= 0) {
1da177e4
LT		 1137 if (bytes == 0)
1138 ret = -ENOMEM;
1139 else
1140 ret = bytes;
1141
1142 goto failed_send;
1143 }
1144 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1145 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1146 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1147 SBAL_FLAGS0_TYPE_WRITE_READ,
00bab910 1148 ct->resp,
1da177e4
LT		 1149 ZFCP_MAX_SBALS_PER_CT_REQ);
1150 if (bytes <= 0) {
1da177e4
LT		 1151 if (bytes == 0)
1152 ret = -ENOMEM;
1153 else
1154 ret = bytes;
1155
1156 goto failed_send;
1157 }
1158 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1159 } else {
1160 /* reject send generic request */
1da177e4
LT		 1161 ret = -EOPNOTSUPP;
1162 goto failed_send;
1163 }
1164
1165 /* settings in QTCB */
1166 fsf_req->qtcb->header.port_handle = port->handle;
06506d00
AH		 1167 fsf_req->qtcb->bottom.support.service_class =
1168 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4 1169 fsf_req->qtcb->bottom.support.timeout = ct->timeout;
059c97d0 1170 fsf_req->data = (unsigned long) ct;
1da177e4 1171
8a36e453
MS		 1172 zfcp_san_dbf_event_ct_request(fsf_req);
1173
2abbe866
AH		 1174 if (erp_action) {
1175 erp_action->fsf_req = fsf_req;
1176 fsf_req->erp_action = erp_action;
1177 zfcp_erp_start_timer(fsf_req);
1178 } else
1179 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1180
1181 ret = zfcp_fsf_req_send(fsf_req);
553448f6 1182 if (ret)
1da177e4 1183 goto failed_send;
1da177e4 1184
1da177e4
LT		 1185 goto out;
1186
1187 failed_send:
1188 zfcp_fsf_req_free(fsf_req);
1189 if (erp_action != NULL) {
1190 erp_action->fsf_req = NULL;
1191 }
1192 failed_req:
1193 out:
00bab910 1194 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4
LT		 1195 return ret;
1196}
1197
1198/**
1199 * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1200 * @fsf_req: pointer to struct zfcp_fsf_req
1201 *
059c97d0
AH		 1202 * Data specific for the Generic Service request is passed using
1203 * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
1204 * Usually a specific handler for the CT request is called which is
1205 * found in this structure.
1da177e4
LT		 1206 */
1207static int
1208zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1209{
1210 struct zfcp_port *port;
1211 struct zfcp_adapter *adapter;
1212 struct zfcp_send_ct *send_ct;
1213 struct fsf_qtcb_header *header;
1214 struct fsf_qtcb_bottom_support *bottom;
1215 int retval = -EINVAL;
1da177e4
LT		 1216
1217 adapter = fsf_req->adapter;
059c97d0 1218 send_ct = (struct zfcp_send_ct *) fsf_req->data;
1da177e4
LT		 1219 port = send_ct->port;
1220 header = &fsf_req->qtcb->header;
1221 bottom = &fsf_req->qtcb->bottom.support;
1222
1223 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1224 goto skip_fsfstatus;
1225
1226 /* evaluate FSF status in QTCB */
1227 switch (header->fsf_status) {
1228
1229 case FSF_GOOD:
8a36e453 1230 zfcp_san_dbf_event_ct_response(fsf_req);
1da177e4
LT		 1231 retval = 0;
1232 break;
1233
1234 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
553448f6 1235 zfcp_fsf_class_not_supp(fsf_req);
1da177e4
LT		 1236 break;
1237
1238 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1239 switch (header->fsf_status_qual.word[0]){
1240 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1241 /* reopening link to port */
1da177e4
LT		 1242 zfcp_test_link(port);
1243 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1244 break;
1245 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1246 /* ERP strategy will escalate */
1da177e4
LT		 1247 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1248 break;
1da177e4
LT		 1249 }
1250 break;
1251
1252 case FSF_ACCESS_DENIED:
553448f6 1253 zfcp_fsf_access_denied_port(fsf_req, port);
1da177e4
LT		 1254 break;
1255
1256 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4
LT		 1257 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1258 break;
1259
1260 case FSF_PORT_HANDLE_NOT_VALID:
1f6f7129 1261 zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req);
1da177e4
LT		 1262 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1263 break;
1264
1265 case FSF_PORT_BOXED:
1f6f7129 1266 zfcp_erp_port_boxed(port, 49, fsf_req);
1da177e4
LT		 1267 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1268 | ZFCP_STATUS_FSFREQ_RETRY;
1269 break;
1270
1271 /* following states should never occure, all cases avoided
1272 in zfcp_fsf_send_ct - but who knows ... */
1273 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1274 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1275 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1276 case FSF_SBAL_MISMATCH:
1da177e4
LT		 1277 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1278 break;
1279
1280 default:
1da177e4
LT		 1281 break;
1282 }
1283
1284skip_fsfstatus:
1285 send_ct->status = retval;
1286
1287 if (send_ct->handler != NULL)
1288 send_ct->handler(send_ct->handler_data);
1289
1290 return retval;
1291}
1292
1293/**
1294 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1295 * @els: pointer to struct zfcp_send_els which contains all needed data for
1296 * the command.
1297 */
1298int
1299zfcp_fsf_send_els(struct zfcp_send_els *els)
1300{
1301 volatile struct qdio_buffer_element *sbale;
1302 struct zfcp_fsf_req *fsf_req;
13e1e1f0 1303 u32 d_id;
1da177e4
LT		 1304 struct zfcp_adapter *adapter;
1305 unsigned long lock_flags;
1306 int bytes;
1307 int ret = 0;
1308
1309 d_id = els->d_id;
1310 adapter = els->adapter;
1311
1312 ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1313 ZFCP_REQ_AUTO_CLEANUP,
1314 NULL, &lock_flags, &fsf_req);
553448f6 1315 if (ret < 0)
1da177e4 1316 goto failed_req;
1da177e4 1317
3f0ca62a
CS		 1318 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
1319 &els->port->status))) {
1320 ret = -EBUSY;
1321 goto port_blocked;
1322 }
1323
00bab910 1324 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 1325 if (zfcp_use_one_sbal(els->req, els->req_count,
1326 els->resp, els->resp_count)){
1327 /* both request buffer and response buffer
1328 fit into one sbale each */
1329 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1330 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1331 sbale[2].length = els->req[0].length;
1332 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1333 sbale[3].length = els->resp[0].length;
1334 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
aef4a983 1335 } else if (adapter->adapter_features &
1da177e4
LT		 1336 FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1337 /* try to use chained SBALs */
1338 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1339 SBAL_FLAGS0_TYPE_WRITE_READ,
00bab910 1340 els->req,
1da177e4
LT		 1341 ZFCP_MAX_SBALS_PER_ELS_REQ);
1342 if (bytes <= 0) {
1da177e4
LT		 1343 if (bytes == 0) {
1344 ret = -ENOMEM;
1345 } else {
1346 ret = bytes;
1347 }
1348 goto failed_send;
1349 }
1350 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1351 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1352 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1353 SBAL_FLAGS0_TYPE_WRITE_READ,
00bab910 1354 els->resp,
1da177e4
LT		 1355 ZFCP_MAX_SBALS_PER_ELS_REQ);
1356 if (bytes <= 0) {
1da177e4
LT		 1357 if (bytes == 0) {
1358 ret = -ENOMEM;
1359 } else {
1360 ret = bytes;
1361 }
1362 goto failed_send;
1363 }
1364 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1365 } else {
1366 /* reject request */
1da177e4
LT		 1367 ret = -EOPNOTSUPP;
1368 goto failed_send;
1369 }
1370
1371 /* settings in QTCB */
1372 fsf_req->qtcb->bottom.support.d_id = d_id;
06506d00
AH		 1373 fsf_req->qtcb->bottom.support.service_class =
1374 ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4 1375 fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
059c97d0 1376 fsf_req->data = (unsigned long) els;
1da177e4 1377
00bab910 1378 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4 1379
8a36e453
MS		 1380 zfcp_san_dbf_event_els_request(fsf_req);
1381
2abbe866
AH		 1382 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1383 ret = zfcp_fsf_req_send(fsf_req);
553448f6 1384 if (ret)
1da177e4 1385 goto failed_send;
1da177e4 1386
1da177e4
LT		 1387 goto out;
1388
3f0ca62a 1389 port_blocked:
1da177e4
LT		 1390 failed_send:
1391 zfcp_fsf_req_free(fsf_req);
1392
1393 failed_req:
1394 out:
00bab910 1395 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4
LT		 1396
1397 return ret;
1398}
1399
1400/**
1401 * zfcp_fsf_send_els_handler - handler for ELS commands
1402 * @fsf_req: pointer to struct zfcp_fsf_req
1403 *
059c97d0
AH		 1404 * Data specific for the ELS command is passed using
1405 * fsf_req->data. There we find the pointer to struct zfcp_send_els.
1406 * Usually a specific handler for the ELS command is called which is
1407 * found in this structure.
1da177e4
LT		 1408 */
1409static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1410{
1411 struct zfcp_adapter *adapter;
1da177e4 1412 struct zfcp_port *port;
13e1e1f0 1413 u32 d_id;
1da177e4
LT		 1414 struct fsf_qtcb_header *header;
1415 struct fsf_qtcb_bottom_support *bottom;
1416 struct zfcp_send_els *send_els;
1417 int retval = -EINVAL;
1da177e4 1418
059c97d0 1419 send_els = (struct zfcp_send_els *) fsf_req->data;
1da177e4 1420 adapter = send_els->adapter;
64b29a13 1421 port = send_els->port;
1da177e4
LT		 1422 d_id = send_els->d_id;
1423 header = &fsf_req->qtcb->header;
1424 bottom = &fsf_req->qtcb->bottom.support;
1425
1426 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1427 goto skip_fsfstatus;
1428
1429 switch (header->fsf_status) {
1430
1431 case FSF_GOOD:
8a36e453 1432 zfcp_san_dbf_event_els_response(fsf_req);
1da177e4
LT		 1433 retval = 0;
1434 break;
1435
1436 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
553448f6 1437 zfcp_fsf_class_not_supp(fsf_req);
1da177e4
LT		 1438 break;
1439
1440 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1441 switch (header->fsf_status_qual.word[0]){
1442 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1443 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1444 zfcp_test_link(port);
1da177e4
LT		 1445 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1446 break;
1447 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1448 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1449 break;
1450 case FSF_SQ_RETRY_IF_POSSIBLE:
1da177e4
LT		 1451 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1452 break;
1da177e4
LT		 1453 }
1454 break;
1455
1456 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1457 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1458 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1459 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4
LT		 1460 break;
1461
1462 case FSF_SBAL_MISMATCH:
1463 /* should never occure, avoided in zfcp_fsf_send_els */
1da177e4
LT		 1464 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1465 break;
1466
1467 case FSF_ACCESS_DENIED:
553448f6 1468 zfcp_fsf_access_denied_port(fsf_req, port);
1da177e4
LT		 1469 break;
1470
1471 default:
1da177e4
LT		 1472 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1473 break;
1474 }
1475
1476skip_fsfstatus:
1477 send_els->status = retval;
1478
aa551daf 1479 if (send_els->handler)
1da177e4
LT		 1480 send_els->handler(send_els->handler_data);
1481
1482 return retval;
1483}
1484
1da177e4
LT		 1485int
1486zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1487{
1488 volatile struct qdio_buffer_element *sbale;
2abbe866 1489 struct zfcp_fsf_req *fsf_req;
52ef11a7 1490 struct zfcp_adapter *adapter = erp_action->adapter;
1da177e4 1491 unsigned long lock_flags;
52ef11a7 1492 int retval;
1da177e4
LT		 1493
1494 /* setup new FSF request */
52ef11a7 1495 retval = zfcp_fsf_req_create(adapter,
1da177e4
LT		 1496 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1497 ZFCP_REQ_AUTO_CLEANUP,
52ef11a7 1498 adapter->pool.fsf_req_erp,
2abbe866 1499 &lock_flags, &fsf_req);
52ef11a7 1500 if (retval) {
00bab910 1501 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
52ef11a7 1502 return retval;
1da177e4
LT		 1503 }
1504
00bab910 1505 sbale = zfcp_qdio_sbale_req(fsf_req);
52ef11a7
SS		 1506 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1507 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1508
2abbe866 1509 fsf_req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1510 FSF_FEATURE_CFDC |
1511 FSF_FEATURE_LUN_SHARING |
9eb69aff 1512 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1513 FSF_FEATURE_UPDATE_ALERT;
2abbe866
AH		 1514 fsf_req->erp_action = erp_action;
1515 erp_action->fsf_req = fsf_req;
1da177e4 1516
2abbe866
AH		 1517 zfcp_erp_start_timer(fsf_req);
1518 retval = zfcp_fsf_req_send(fsf_req);
00bab910 1519 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4 1520 if (retval) {
2abbe866 1521 zfcp_fsf_req_free(fsf_req);
1da177e4 1522 erp_action->fsf_req = NULL;
1da177e4
LT		 1523 }
1524
52ef11a7
SS		 1525 return retval;
1526}
1da177e4 1527
52ef11a7
SS		 1528int
1529zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1530 struct fsf_qtcb_bottom_config *data)
1531{
1532 volatile struct qdio_buffer_element *sbale;
1533 struct zfcp_fsf_req *fsf_req;
1534 unsigned long lock_flags;
1535 int retval;
1536
1537 /* setup new FSF request */
1538 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
aee6ef18
SS		 1539 ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags,
1540 &fsf_req);
52ef11a7 1541 if (retval) {
00bab910 1542 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
52ef11a7
SS		 1543 return retval;
1544 }
1545
00bab910 1546 sbale = zfcp_qdio_sbale_req(fsf_req);
52ef11a7
SS		 1547 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1548 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1549
1550 fsf_req->qtcb->bottom.config.feature_selection =
1551 FSF_FEATURE_CFDC |
1552 FSF_FEATURE_LUN_SHARING |
1553 FSF_FEATURE_NOTIFICATION_LOST |
1554 FSF_FEATURE_UPDATE_ALERT;
1555
1556 if (data)
1557 fsf_req->data = (unsigned long) data;
1558
1559 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1560 retval = zfcp_fsf_req_send(fsf_req);
00bab910 1561 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
553448f6 1562 if (!retval)
52ef11a7
SS		 1563 wait_event(fsf_req->completion_wq,
1564 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1565
1566 zfcp_fsf_req_free(fsf_req);
1567
1da177e4
LT		 1568 return retval;
1569}
1570
1571/**
1572 * zfcp_fsf_exchange_config_evaluate
1573 * @fsf_req: fsf_req which belongs to xchg config data request
1574 * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
1575 *
1576 * returns: -EIO on error, 0 otherwise
1577 */
1578static int
1579zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1580{
1581 struct fsf_qtcb_bottom_config *bottom;
1582 struct zfcp_adapter *adapter = fsf_req->adapter;
13e1e1f0 1583 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4
LT		 1584
1585 bottom = &fsf_req->qtcb->bottom.config;
1da177e4 1586 adapter->fsf_lic_version = bottom->lic_version;
aef4a983
MS		 1587 adapter->adapter_features = bottom->adapter_features;
1588 adapter->connection_features = bottom->connection_features;
6f71d9bc
JB		 1589 adapter->peer_wwpn = 0;
1590 adapter->peer_wwnn = 0;
1591 adapter->peer_d_id = 0;
1da177e4
LT		 1592
1593 if (xchg_ok) {
52ef11a7
SS		 1594
1595 if (fsf_req->data)
1596 memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
1597 bottom, sizeof (struct fsf_qtcb_bottom_config));
1598
13e1e1f0
AH		 1599 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
1600 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
1601 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
1602 fc_host_speed(shost) = bottom->fc_link_speed;
52ef11a7
SS		 1603 fc_host_supported_classes(shost) =
1604 FC_COS_CLASS2 | FC_COS_CLASS3;
1da177e4 1605 adapter->hydra_version = bottom->adapter_type;
c9615858 1606 adapter->timer_ticks = bottom->timer_interval;
ad757cdf
AH		 1607 if (fc_host_permanent_port_name(shost) == -1)
1608 fc_host_permanent_port_name(shost) =
1609 fc_host_port_name(shost);
1610 if (bottom->fc_topology == FSF_TOPO_P2P) {
1611 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
1612 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
1613 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
1614 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
1615 } else if (bottom->fc_topology == FSF_TOPO_FABRIC)
1616 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
1617 else if (bottom->fc_topology == FSF_TOPO_AL)
1618 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
1619 else
1620 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1da177e4 1621 } else {
13e1e1f0
AH		 1622 fc_host_node_name(shost) = 0;
1623 fc_host_port_name(shost) = 0;
1624 fc_host_port_id(shost) = 0;
1625 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
ad757cdf 1626 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
1da177e4
LT		 1627 adapter->hydra_version = 0;
1628 }
1629
aef4a983 1630 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
1da177e4 1631 adapter->hardware_version = bottom->hardware_version;
13e1e1f0
AH		 1632 memcpy(fc_host_serial_number(shost), bottom->serial_number,
1633 min(FC_SERIAL_NUMBER_SIZE, 17));
1634 EBCASC(fc_host_serial_number(shost),
1635 min(FC_SERIAL_NUMBER_SIZE, 17));
1da177e4
LT		 1636 }
1637
1da177e4 1638 if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
553448f6
CS		 1639 dev_err(&adapter->ccw_device->dev,
1640 "The adapter only supports newer control block "
1641 "versions, try updated device driver.\n");
1f6f7129 1642 zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req);
1da177e4
LT		 1643 return -EIO;
1644 }
1645 if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
553448f6
CS		 1646 dev_err(&adapter->ccw_device->dev,
1647 "The adapter only supports older control block "
1648 "versions, consider a microcode upgrade.\n");
1f6f7129 1649 zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req);
1da177e4
LT		 1650 return -EIO;
1651 }
1652 return 0;
1653}
1654
52ef11a7 1655/**
1da177e4
LT		 1656 * function: zfcp_fsf_exchange_config_data_handler
1657 *
1658 * purpose: is called for finished Exchange Configuration Data command
1659 *
1660 * returns:
1661 */
1662static int
1663zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
1664{
1665 struct fsf_qtcb_bottom_config *bottom;
1666 struct zfcp_adapter *adapter = fsf_req->adapter;
aef4a983 1667 struct fsf_qtcb *qtcb = fsf_req->qtcb;
1da177e4
LT		 1668
1669 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1670 return -EIO;
1671
aef4a983 1672 switch (qtcb->header.fsf_status) {
1da177e4
LT		 1673
1674 case FSF_GOOD:
1da177e4
LT		 1675 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
1676 return -EIO;
1677
ad757cdf
AH		 1678 switch (fc_host_port_type(adapter->scsi_host)) {
1679 case FC_PORTTYPE_PTP:
553448f6
CS		 1680 if (fsf_req->erp_action)
1681 dev_info(&adapter->ccw_device->dev,
1682 "Point-to-Point fibrechannel "
1683 "configuration detected.\n");
6f71d9bc 1684 break;
ad757cdf 1685 case FC_PORTTYPE_NLPORT:
553448f6
CS		 1686 dev_err(&adapter->ccw_device->dev,
1687 "Unsupported arbitrated loop fibrechannel "
1688 "topology detected, shutting down adapter\n");
1f6f7129 1689 zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req);
1da177e4 1690 return -EIO;
ad757cdf 1691 case FC_PORTTYPE_NPORT:
ec258fe4 1692 if (fsf_req->erp_action)
553448f6
CS		 1693 dev_info(&adapter->ccw_device->dev,
1694 "Switched fabric fibrechannel "
1695 "network detected.\n");
1da177e4
LT		 1696 break;
1697 default:
553448f6
CS		 1698 dev_err(&adapter->ccw_device->dev,
1699 "The fibrechannel topology reported by the "
1700 "adapter is not known by the zfcp driver, "
1701 "shutting down adapter.\n");
1f6f7129 1702 zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req);
1da177e4
LT		 1703 return -EIO;
1704 }
aef4a983 1705 bottom = &qtcb->bottom.config;
1da177e4 1706 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
553448f6
CS		 1707 dev_err(&adapter->ccw_device->dev,
1708 "Maximum QTCB size (%d bytes) allowed by "
1709 "the adapter is lower than the minimum "
1710 "required by the driver (%ld bytes).\n",
1711 bottom->max_qtcb_size, sizeof(struct fsf_qtcb));
1f6f7129 1712 zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req);
1da177e4
LT		 1713 return -EIO;
1714 }
1715 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
1716 &adapter->status);
1717 break;
1718 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
1da177e4
LT		 1719 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
1720 return -EIO;
1721
52ef11a7
SS		 1722 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
1723 &adapter->status);
aef4a983 1724
698ec016 1725 zfcp_fsf_link_down_info_eval(fsf_req, 42,
aef4a983 1726 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4
LT		 1727 break;
1728 default:
1f6f7129 1729 zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req);
1da177e4
LT		 1730 return -EIO;
1731 }
1732 return 0;
1733}
1734
1735/**
1736 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1737 * @erp_action: ERP action for the adapter for which port data is requested
1da177e4
LT		 1738 */
1739int
52ef11a7 1740zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4
LT		 1741{
1742 volatile struct qdio_buffer_element *sbale;
52ef11a7
SS		 1743 struct zfcp_fsf_req *fsf_req;
1744 struct zfcp_adapter *adapter = erp_action->adapter;
2abbe866 1745 unsigned long lock_flags;
52ef11a7 1746 int retval;
1da177e4 1747
553448f6 1748 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1749 return -EOPNOTSUPP;
1da177e4 1750
1da177e4
LT		 1751 /* setup new FSF request */
1752 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
52ef11a7
SS		 1753 ZFCP_REQ_AUTO_CLEANUP,
1754 adapter->pool.fsf_req_erp,
1755 &lock_flags, &fsf_req);
1756 if (retval) {
00bab910 1757 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
2448c459 1758 return retval;
aef4a983
MS		 1759 }
1760
00bab910 1761 sbale = zfcp_qdio_sbale_req(fsf_req);
52ef11a7
SS		 1762 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1763 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1764
52ef11a7
SS		 1765 erp_action->fsf_req = fsf_req;
1766 fsf_req->erp_action = erp_action;
1767 zfcp_erp_start_timer(fsf_req);
1da177e4 1768
2abbe866 1769 retval = zfcp_fsf_req_send(fsf_req);
00bab910 1770 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
52ef11a7 1771
1da177e4 1772 if (retval) {
1da177e4 1773 zfcp_fsf_req_free(fsf_req);
52ef11a7
SS		 1774 erp_action->fsf_req = NULL;
1775 }
52ef11a7
SS		 1776 return retval;
1777}
1778
1779
1780/**
1781 * zfcp_fsf_exchange_port_data_sync - request information about local port
1782 * and wait until information is ready
1783 */
1784int
1785zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1786 struct fsf_qtcb_bottom_port *data)
1787{
1788 volatile struct qdio_buffer_element *sbale;
1789 struct zfcp_fsf_req *fsf_req;
1790 unsigned long lock_flags;
1791 int retval;
1792
553448f6 1793 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1794 return -EOPNOTSUPP;
52ef11a7
SS		 1795
1796 /* setup new FSF request */
1797 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1798 0, NULL, &lock_flags, &fsf_req);
1799 if (retval) {
00bab910 1800 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
2448c459 1801 return retval;
1da177e4
LT		 1802 }
1803
52ef11a7
SS		 1804 if (data)
1805 fsf_req->data = (unsigned long) data;
1806
00bab910 1807 sbale = zfcp_qdio_sbale_req(fsf_req);
52ef11a7
SS		 1808 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1809 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1810
1811 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
1812 retval = zfcp_fsf_req_send(fsf_req);
00bab910 1813 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4 1814
553448f6 1815 if (!retval)
2448c459
AH		 1816 wait_event(fsf_req->completion_wq,
1817 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7
SS		 1818
1819 zfcp_fsf_req_free(fsf_req);
1820
1da177e4
LT		 1821 return retval;
1822}
1823
2f8f3ed5
AH		 1824/**
1825 * zfcp_fsf_exchange_port_evaluate
1826 * @fsf_req: fsf_req which belongs to xchg port data request
1827 * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
1828 */
1829static void
1830zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
1831{
1832 struct zfcp_adapter *adapter;
52ef11a7 1833 struct fsf_qtcb_bottom_port *bottom;
2f8f3ed5
AH		 1834 struct Scsi_Host *shost;
1835
1836 adapter = fsf_req->adapter;
52ef11a7 1837 bottom = &fsf_req->qtcb->bottom.port;
2f8f3ed5
AH		 1838 shost = adapter->scsi_host;
1839
52ef11a7
SS		 1840 if (fsf_req->data)
1841 memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
1842 sizeof(struct fsf_qtcb_bottom_port));
2f8f3ed5
AH		 1843
1844 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
1845 fc_host_permanent_port_name(shost) = bottom->wwpn;
1846 else
1847 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
1848 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
1849 fc_host_supported_speeds(shost) = bottom->supported_speed;
1850}
1da177e4
LT		 1851
1852/**
1853 * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
1854 * @fsf_req: pointer to struct zfcp_fsf_req
1855 */
1856static void
1857zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
1858{
2f8f3ed5
AH		 1859 struct zfcp_adapter *adapter;
1860 struct fsf_qtcb *qtcb;
1861
1862 adapter = fsf_req->adapter;
1863 qtcb = fsf_req->qtcb;
1da177e4
LT		 1864
1865 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1866 return;
1867
aef4a983 1868 switch (qtcb->header.fsf_status) {
1da177e4 1869 case FSF_GOOD:
2f8f3ed5 1870 zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
aef4a983 1871 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
aef4a983 1872 break;
aef4a983 1873 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2f8f3ed5 1874 zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
aef4a983 1875 atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
698ec016 1876 zfcp_fsf_link_down_info_eval(fsf_req, 43,
aef4a983 1877 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 1878 break;
1da177e4
LT		 1879 }
1880}
1881
1882
1883/*
1884 * function: zfcp_fsf_open_port
1885 *
41fa2ada 1886 * purpose:
1da177e4
LT		 1887 *
1888 * returns: address of initiated FSF request
41fa2ada 1889 * NULL - request could not be initiated
1da177e4
LT		 1890 */
1891int
1892zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1893{
1894 volatile struct qdio_buffer_element *sbale;
2abbe866 1895 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 1896 unsigned long lock_flags;
1897 int retval = 0;
1898
1899 /* setup new FSF request */
1900 retval = zfcp_fsf_req_create(erp_action->adapter,
1901 FSF_QTCB_OPEN_PORT_WITH_DID,
1902 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1903 erp_action->adapter->pool.fsf_req_erp,
2abbe866 1904 &lock_flags, &fsf_req);
553448f6 1905 if (retval < 0)
1da177e4 1906 goto out;
1da177e4 1907
00bab910 1908 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 1909 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1910 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1911
2abbe866 1912 fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1da177e4 1913 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2abbe866
AH		 1914 fsf_req->data = (unsigned long) erp_action->port;
1915 fsf_req->erp_action = erp_action;
1916 erp_action->fsf_req = fsf_req;
1da177e4 1917
2abbe866
AH		 1918 zfcp_erp_start_timer(fsf_req);
1919 retval = zfcp_fsf_req_send(fsf_req);
1da177e4 1920 if (retval) {
2abbe866 1921 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 1922 erp_action->fsf_req = NULL;
1923 goto out;
1924 }
1925
1da177e4 1926 out:
00bab910 1927 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
1da177e4
LT		 1928 return retval;
1929}
1930
1931/*
1932 * function: zfcp_fsf_open_port_handler
1933 *
1934 * purpose: is called for finished Open Port command
1935 *
41fa2ada 1936 * returns:
1da177e4
LT		 1937 */
1938static int
1939zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
1940{
1941 int retval = -EINVAL;
1942 struct zfcp_port *port;
1943 struct fsf_plogi *plogi;
1944 struct fsf_qtcb_header *header;
1da177e4 1945
059c97d0 1946 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 1947 header = &fsf_req->qtcb->header;
1948
1949 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1950 /* don't change port status in our bookkeeping */
1951 goto skip_fsfstatus;
1952 }
1953
1954 /* evaluate FSF status in QTCB */
1955 switch (header->fsf_status) {
1956
1957 case FSF_PORT_ALREADY_OPEN:
1da177e4
LT		 1958 /*
1959 * This is a bug, however operation should continue normally
1960 * if it is simply ignored
1961 */
1962 break;
1963
1964 case FSF_ACCESS_DENIED:
553448f6 1965 zfcp_fsf_access_denied_port(fsf_req, port);
1da177e4
LT		 1966 break;
1967
1968 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
553448f6
CS		 1969 dev_warn(&fsf_req->adapter->ccw_device->dev,
1970 "The adapter is out of resources. The remote port "
1971 "0x%016Lx could not be opened, disabling it.\n",
1972 port->wwpn);
1f6f7129 1973 zfcp_erp_port_failed(port, 31, fsf_req);
1da177e4
LT		 1974 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1975 break;
1976
1977 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1978 switch (header->fsf_status_qual.word[0]) {
1979 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 1980 /* ERP strategy will escalate */
1981 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1982 break;
1983 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1984 /* ERP strategy will escalate */
1da177e4
LT		 1985 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1986 break;
1987 case FSF_SQ_NO_RETRY_POSSIBLE:
553448f6
CS		 1988 dev_warn(&fsf_req->adapter->ccw_device->dev,
1989 "The remote port 0x%016Lx could not be "
1990 "opened. Disabling it.\n", port->wwpn);
1f6f7129 1991 zfcp_erp_port_failed(port, 32, fsf_req);
1da177e4
LT		 1992 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1993 break;
1994 default:
1da177e4
LT		 1995 break;
1996 }
1997 break;
1998
1999 case FSF_GOOD:
1da177e4
LT		 2000 /* save port handle assigned by FSF */
2001 port->handle = header->port_handle;
1da177e4
LT		 2002 /* mark port as open */
2003 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2004 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 2005 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
2006 ZFCP_STATUS_COMMON_ACCESS_BOXED,
2007 &port->status);
1da177e4
LT		 2008 retval = 0;
2009 /* check whether D_ID has changed during open */
2010 /*
2011 * FIXME: This check is not airtight, as the FCP channel does
2012 * not monitor closures of target port connections caused on
2013 * the remote side. Thus, they might miss out on invalidating
2014 * locally cached WWPNs (and other N_Port parameters) of gone
2015 * target ports. So, our heroic attempt to make things safe
2016 * could be undermined by 'open port' response data tagged with
2017 * obsolete WWPNs. Another reason to monitor potential
2018 * connection closures ourself at least (by interpreting
2019 * incoming ELS' and unsolicited status). It just crosses my
2020 * mind that one should be able to cross-check by means of
2021 * another GID_PN straight after a port has been opened.
2022 * Alternately, an ADISC/PDISC ELS should suffice, as well.
2023 */
2024 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2025 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2026 {
2027 if (fsf_req->qtcb->bottom.support.els1_length <
75bfc283 2028 sizeof (struct fsf_plogi)) {
1da177e4
LT		 2029 /* skip sanity check and assume wwpn is ok */
2030 } else {
2031 if (plogi->serv_param.wwpn != port->wwpn) {
1da177e4
LT		 2032 atomic_clear_mask(
2033 ZFCP_STATUS_PORT_DID_DID,
2034 &port->status);
75bfc283 2035 } else {
1da177e4 2036 port->wwnn = plogi->serv_param.wwnn;
24073b47 2037 zfcp_fc_plogi_evaluate(port, plogi);
75bfc283 2038 }
1da177e4
LT		 2039 }
2040 }
2041 break;
2042
2043 case FSF_UNKNOWN_OP_SUBTYPE:
2044 /* should never occure, subtype not set in zfcp_fsf_open_port */
1da177e4
LT		 2045 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2046 break;
2047
2048 default:
1da177e4
LT		 2049 break;
2050 }
2051
2052 skip_fsfstatus:
2053 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2054 return retval;
2055}
2056
2057/*
2058 * function: zfcp_fsf_close_port
2059 *
2060 * purpose: submit FSF command "close port"
2061 *
2062 * returns: address of initiated FSF request
2063 * NULL - request could not be initiated
2064 */
2065int
2066zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2067{
2068 volatile struct qdio_buffer_element *sbale;
2abbe866 2069 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2070 unsigned long lock_flags;
2071 int retval = 0;
2072
2073 /* setup new FSF request */
2074 retval = zfcp_fsf_req_create(erp_action->adapter,
2075 FSF_QTCB_CLOSE_PORT,
2076 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2077 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2078 &lock_flags, &fsf_req);
553448f6 2079 if (retval < 0)
1da177e4 2080 goto out;
1da177e4 2081
00bab910 2082 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 2083 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2084 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2085
2086 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2abbe866
AH		 2087 fsf_req->data = (unsigned long) erp_action->port;
2088 fsf_req->erp_action = erp_action;
2089 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2090 fsf_req->erp_action = erp_action;
2091 erp_action->fsf_req = fsf_req;
2092
2093 zfcp_erp_start_timer(fsf_req);
2094 retval = zfcp_fsf_req_send(fsf_req);
1da177e4 2095 if (retval) {
2abbe866 2096 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2097 erp_action->fsf_req = NULL;
2098 goto out;
2099 }
2100
1da177e4 2101 out:
00bab910 2102 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
1da177e4
LT		 2103 return retval;
2104}
2105
2106/*
2107 * function: zfcp_fsf_close_port_handler
2108 *
2109 * purpose: is called for finished Close Port FSF command
2110 *
2111 * returns:
2112 */
2113static int
2114zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2115{
2116 int retval = -EINVAL;
2117 struct zfcp_port *port;
2118
059c97d0 2119 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2120
2121 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2122 /* don't change port status in our bookkeeping */
2123 goto skip_fsfstatus;
2124 }
2125
2126 /* evaluate FSF status in QTCB */
2127 switch (fsf_req->qtcb->header.fsf_status) {
2128
2129 case FSF_PORT_HANDLE_NOT_VALID:
1f6f7129 2130 zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req);
1da177e4
LT		 2131 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2132 break;
2133
2134 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2135 /* Note: FSF has actually closed the port in this case.
2136 * The status code is just daft. Fingers crossed for a change
2137 */
2138 retval = 0;
2139 break;
2140
2141 case FSF_GOOD:
1f6f7129 2142 zfcp_erp_modify_port_status(port, 33, fsf_req,
1da177e4
LT		 2143 ZFCP_STATUS_COMMON_OPEN,
2144 ZFCP_CLEAR);
2145 retval = 0;
2146 break;
1da177e4
LT		 2147 }
2148
2149 skip_fsfstatus:
2150 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2151 return retval;
2152}
2153
2154/*
2155 * function: zfcp_fsf_close_physical_port
2156 *
2157 * purpose: submit FSF command "close physical port"
2158 *
2159 * returns: address of initiated FSF request
2160 * NULL - request could not be initiated
2161 */
2162int
2163zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2164{
1da177e4 2165 volatile struct qdio_buffer_element *sbale;
2abbe866
AH		 2166 struct zfcp_fsf_req *fsf_req;
2167 unsigned long lock_flags;
2168 int retval = 0;
1da177e4
LT		 2169
2170 /* setup new FSF request */
2171 retval = zfcp_fsf_req_create(erp_action->adapter,
2172 FSF_QTCB_CLOSE_PHYSICAL_PORT,
2173 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2174 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2175 &lock_flags, &fsf_req);
553448f6 2176 if (retval < 0)
1da177e4 2177 goto out;
1da177e4 2178
00bab910 2179 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 2180 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2181 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2182
2183 /* mark port as being closed */
2184 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2185 &erp_action->port->status);
2186 /* save a pointer to this port */
2abbe866
AH		 2187 fsf_req->data = (unsigned long) erp_action->port;
2188 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2189 fsf_req->erp_action = erp_action;
2190 erp_action->fsf_req = fsf_req;
2191
2192 zfcp_erp_start_timer(fsf_req);
2193 retval = zfcp_fsf_req_send(fsf_req);
1da177e4 2194 if (retval) {
2abbe866 2195 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2196 erp_action->fsf_req = NULL;
2197 goto out;
2198 }
2199
1da177e4 2200 out:
00bab910 2201 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
1da177e4
LT		 2202 return retval;
2203}
2204
2205/*
2206 * function: zfcp_fsf_close_physical_port_handler
2207 *
2208 * purpose: is called for finished Close Physical Port FSF command
2209 *
2210 * returns:
2211 */
2212static int
2213zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2214{
2215 int retval = -EINVAL;
2216 struct zfcp_port *port;
2217 struct zfcp_unit *unit;
2218 struct fsf_qtcb_header *header;
1da177e4 2219
059c97d0 2220 port = (struct zfcp_port *) fsf_req->data;
1da177e4
LT		 2221 header = &fsf_req->qtcb->header;
2222
2223 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2224 /* don't change port status in our bookkeeping */
2225 goto skip_fsfstatus;
2226 }
2227
2228 /* evaluate FSF status in QTCB */
2229 switch (header->fsf_status) {
2230
2231 case FSF_PORT_HANDLE_NOT_VALID:
1f6f7129 2232 zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req);
1da177e4
LT		 2233 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2234 break;
2235
2236 case FSF_ACCESS_DENIED:
553448f6 2237 zfcp_fsf_access_denied_port(fsf_req, port);
1da177e4
LT		 2238 break;
2239
2240 case FSF_PORT_BOXED:
1f6f7129 2241 zfcp_erp_port_boxed(port, 50, fsf_req);
1da177e4
LT		 2242 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2243 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 2244
2245 /* can't use generic zfcp_erp_modify_port_status because
2246 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
2247 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2248 list_for_each_entry(unit, &port->unit_list_head, list)
2249 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
2250 &unit->status);
1da177e4
LT		 2251 break;
2252
2253 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2254 switch (header->fsf_status_qual.word[0]) {
2255 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4
LT		 2256 /* This will now be escalated by ERP */
2257 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2258 break;
2259 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 2260 /* ERP strategy will escalate */
1da177e4
LT		 2261 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2262 break;
1da177e4
LT		 2263 }
2264 break;
2265
2266 case FSF_GOOD:
1da177e4
LT		 2267 /* can't use generic zfcp_erp_modify_port_status because
2268 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2269 */
2270 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2271 list_for_each_entry(unit, &port->unit_list_head, list)
2272 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2273 retval = 0;
2274 break;
1da177e4
LT		 2275 }
2276
2277 skip_fsfstatus:
2278 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2279 return retval;
2280}
2281
2282/*
2283 * function: zfcp_fsf_open_unit
2284 *
2285 * purpose:
2286 *
2287 * returns:
2288 *
2289 * assumptions: This routine does not check whether the associated
2290 * remote port has already been opened. This should be
2291 * done by calling routines. Otherwise some status
2292 * may be presented by FSF
2293 */
2294int
2295zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
2296{
2297 volatile struct qdio_buffer_element *sbale;
2abbe866 2298 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2299 unsigned long lock_flags;
2300 int retval = 0;
2301
2302 /* setup new FSF request */
2303 retval = zfcp_fsf_req_create(erp_action->adapter,
2304 FSF_QTCB_OPEN_LUN,
2305 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2306 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2307 &lock_flags, &fsf_req);
553448f6 2308 if (retval < 0)
1da177e4 2309 goto out;
1da177e4 2310
00bab910 2311 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 2312 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2313 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2314
2abbe866
AH		 2315 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2316 fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
aef4a983 2317 if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2abbe866 2318 fsf_req->qtcb->bottom.support.option =
06506d00 2319 FSF_OPEN_LUN_SUPPRESS_BOXING;
1da177e4 2320 atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
2abbe866
AH		 2321 fsf_req->data = (unsigned long) erp_action->unit;
2322 fsf_req->erp_action = erp_action;
2323 erp_action->fsf_req = fsf_req;
1da177e4 2324
2abbe866
AH		 2325 zfcp_erp_start_timer(fsf_req);
2326 retval = zfcp_fsf_req_send(erp_action->fsf_req);
1da177e4 2327 if (retval) {
2abbe866 2328 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2329 erp_action->fsf_req = NULL;
2330 goto out;
2331 }
1da177e4 2332 out:
00bab910 2333 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
1da177e4
LT		 2334 return retval;
2335}
2336
2337/*
2338 * function: zfcp_fsf_open_unit_handler
2339 *
2340 * purpose: is called for finished Open LUN command
2341 *
41fa2ada 2342 * returns:
1da177e4
LT		 2343 */
2344static int
2345zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
2346{
2347 int retval = -EINVAL;
2348 struct zfcp_adapter *adapter;
2349 struct zfcp_unit *unit;
2350 struct fsf_qtcb_header *header;
2351 struct fsf_qtcb_bottom_support *bottom;
2352 struct fsf_queue_designator *queue_designator;
aef4a983 2353 int exclusive, readwrite;
1da177e4 2354
059c97d0 2355 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 2356
2357 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2358 /* don't change unit status in our bookkeeping */
2359 goto skip_fsfstatus;
2360 }
2361
2362 adapter = fsf_req->adapter;
2363 header = &fsf_req->qtcb->header;
2364 bottom = &fsf_req->qtcb->bottom.support;
2365 queue_designator = &header->fsf_status_qual.fsf_queue_designator;
2366
1da177e4 2367 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 2368 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 2369 ZFCP_STATUS_UNIT_SHARED |
2370 ZFCP_STATUS_UNIT_READONLY,
2371 &unit->status);
2372
2373 /* evaluate FSF status in QTCB */
2374 switch (header->fsf_status) {
2375
2376 case FSF_PORT_HANDLE_NOT_VALID:
1f6f7129 2377 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req);
1da177e4
LT		 2378 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2379 break;
2380
2381 case FSF_LUN_ALREADY_OPEN:
1da177e4
LT		 2382 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2383 break;
2384
2385 case FSF_ACCESS_DENIED:
553448f6 2386 zfcp_fsf_access_denied_unit(fsf_req, unit);
1da177e4 2387 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 2388 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4
LT		 2389 break;
2390
2391 case FSF_PORT_BOXED:
1f6f7129 2392 zfcp_erp_port_boxed(unit->port, 51, fsf_req);
1da177e4
LT		 2393 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2394 ZFCP_STATUS_FSFREQ_RETRY;
2395 break;
2396
2397 case FSF_LUN_SHARING_VIOLATION:
1da177e4 2398 if (header->fsf_status_qual.word[0] != 0) {
553448f6
CS		 2399 dev_warn(&adapter->ccw_device->dev,
2400 "FCP-LUN 0x%Lx at the remote port "
2401 "with WWPN 0x%Lx "
2402 "connected to the adapter "
2403 "is already in use in LPAR%d, CSS%d.\n",
2404 unit->fcp_lun,
2405 unit->port->wwpn,
2406 queue_designator->hla,
2407 queue_designator->cssid);
2408 } else
2409 zfcp_act_eval_err(adapter,
2410 header->fsf_status_qual.word[2]);
1f6f7129 2411 zfcp_erp_unit_access_denied(unit, 60, fsf_req);
1da177e4
LT		 2412 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
2413 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
2414 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2415 break;
2416
2417 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
553448f6
CS		 2418 dev_warn(&fsf_req->adapter->ccw_device->dev,
2419 "The adapter ran out of resources. There is no "
2420 "handle available for unit 0x%016Lx on port 0x%016Lx.",
2421 unit->fcp_lun, unit->port->wwpn);
1f6f7129 2422 zfcp_erp_unit_failed(unit, 34, fsf_req);
1da177e4
LT		 2423 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2424 break;
2425
2426 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2427 switch (header->fsf_status_qual.word[0]) {
2428 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 2429 /* Re-establish link to port */
65a8d4e1 2430 zfcp_test_link(unit->port);
1da177e4
LT		 2431 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2432 break;
2433 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 2434 /* ERP strategy will escalate */
1da177e4
LT		 2435 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2436 break;
1da177e4
LT		 2437 }
2438 break;
2439
2440 case FSF_INVALID_COMMAND_OPTION:
1da177e4
LT		 2441 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2442 retval = -EINVAL;
2443 break;
2444
2445 case FSF_GOOD:
1da177e4
LT		 2446 /* save LUN handle assigned by FSF */
2447 unit->handle = header->lun_handle;
1da177e4
LT		 2448 /* mark unit as open */
2449 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 2450
2451 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
2452 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
2453 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
2454 exclusive = (bottom->lun_access_info &
2455 FSF_UNIT_ACCESS_EXCLUSIVE);
2456 readwrite = (bottom->lun_access_info &
2457 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
2458
1da177e4
LT		 2459 if (!exclusive)
2460 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
2461 &unit->status);
2462
2463 if (!readwrite) {
2464 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
2465 &unit->status);
553448f6
CS		 2466 dev_info(&fsf_req->adapter->ccw_device->dev,
2467 "Read-only access for unit 0x%016Lx "
2468 "on port 0x%016Lx.\n",
2469 unit->fcp_lun, unit->port->wwpn);
1da177e4
LT		 2470 }
2471
2472 if (exclusive && !readwrite) {
553448f6
CS		 2473 dev_err(&fsf_req->adapter->ccw_device->dev,
2474 "Exclusive access of read-only unit "
2475 "0x%016Lx on port 0x%016Lx not "
2476 "supported, disabling unit.\n",
2477 unit->fcp_lun, unit->port->wwpn);
1f6f7129 2478 zfcp_erp_unit_failed(unit, 35, fsf_req);
1da177e4 2479 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1f6f7129 2480 zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req);
1da177e4 2481 } else if (!exclusive && readwrite) {
553448f6
CS		 2482 dev_err(&fsf_req->adapter->ccw_device->dev,
2483 "Shared access of read-write unit "
2484 "0x%016Lx on port 0x%016Lx not "
2485 "supported, disabling unit.\n",
2486 unit->fcp_lun, unit->port->wwpn);
1f6f7129 2487 zfcp_erp_unit_failed(unit, 36, fsf_req);
1da177e4 2488 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1f6f7129 2489 zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req);
1da177e4
LT		 2490 }
2491 }
2492
2493 retval = 0;
2494 break;
1da177e4
LT		 2495 }
2496
2497 skip_fsfstatus:
2498 atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
2499 return retval;
2500}
2501
2502/*
2503 * function: zfcp_fsf_close_unit
2504 *
2505 * purpose:
2506 *
2507 * returns: address of fsf_req - request successfully initiated
41fa2ada 2508 * NULL -
1da177e4
LT		 2509 *
2510 * assumptions: This routine does not check whether the associated
2511 * remote port/lun has already been opened. This should be
2512 * done by calling routines. Otherwise some status
2513 * may be presented by FSF
2514 */
2515int
2516zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
2517{
2518 volatile struct qdio_buffer_element *sbale;
2abbe866 2519 struct zfcp_fsf_req *fsf_req;
1da177e4
LT		 2520 unsigned long lock_flags;
2521 int retval = 0;
2522
2523 /* setup new FSF request */
2524 retval = zfcp_fsf_req_create(erp_action->adapter,
2525 FSF_QTCB_CLOSE_LUN,
2526 ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2527 erp_action->adapter->pool.fsf_req_erp,
2abbe866 2528 &lock_flags, &fsf_req);
553448f6 2529 if (retval < 0)
1da177e4 2530 goto out;
1da177e4 2531
00bab910 2532 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 2533 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2534 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2535
2abbe866
AH		 2536 fsf_req->qtcb->header.port_handle = erp_action->port->handle;
2537 fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
1da177e4 2538 atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
2abbe866
AH		 2539 fsf_req->data = (unsigned long) erp_action->unit;
2540 fsf_req->erp_action = erp_action;
2541 erp_action->fsf_req = fsf_req;
1da177e4 2542
2abbe866
AH		 2543 zfcp_erp_start_timer(fsf_req);
2544 retval = zfcp_fsf_req_send(erp_action->fsf_req);
1da177e4 2545 if (retval) {
2abbe866 2546 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 2547 erp_action->fsf_req = NULL;
2548 goto out;
2549 }
2550
1da177e4 2551 out:
00bab910 2552 write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
1da177e4
LT		 2553 return retval;
2554}
2555
2556/*
2557 * function: zfcp_fsf_close_unit_handler
2558 *
2559 * purpose: is called for finished Close LUN FSF command
2560 *
2561 * returns:
2562 */
2563static int
2564zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
2565{
2566 int retval = -EINVAL;
2567 struct zfcp_unit *unit;
2568
059c97d0 2569 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4
LT		 2570
2571 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2572 /* don't change unit status in our bookkeeping */
2573 goto skip_fsfstatus;
2574 }
2575
2576 /* evaluate FSF status in QTCB */
2577 switch (fsf_req->qtcb->header.fsf_status) {
2578
2579 case FSF_PORT_HANDLE_NOT_VALID:
1f6f7129 2580 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req);
1da177e4
LT		 2581 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2582 break;
2583
2584 case FSF_LUN_HANDLE_NOT_VALID:
1f6f7129 2585 zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req);
1da177e4
LT		 2586 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2587 break;
2588
2589 case FSF_PORT_BOXED:
1f6f7129 2590 zfcp_erp_port_boxed(unit->port, 52, fsf_req);
1da177e4
LT		 2591 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2592 ZFCP_STATUS_FSFREQ_RETRY;
2593 break;
2594
2595 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2596 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
2597 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 2598 /* re-establish link to port */
65a8d4e1 2599 zfcp_test_link(unit->port);
1da177e4
LT		 2600 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2601 break;
2602 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 2603 /* ERP strategy will escalate */
1da177e4
LT		 2604 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2605 break;
2606 default:
1da177e4
LT		 2607 break;
2608 }
2609 break;
2610
2611 case FSF_GOOD:
1da177e4
LT		 2612 /* mark unit as closed */
2613 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2614 retval = 0;
2615 break;
1da177e4
LT		 2616 }
2617
2618 skip_fsfstatus:
2619 atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
2620 return retval;
2621}
2622
2623/**
2624 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2625 * @adapter: adapter where scsi command is issued
2626 * @unit: unit where command is sent to
2627 * @scsi_cmnd: scsi command to be sent
2628 * @timer: timer to be started when request is initiated
2629 * @req_flags: flags for fsf_request
2630 */
2631int
2632zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2633 struct zfcp_unit *unit,
2634 struct scsi_cmnd * scsi_cmnd,
2abbe866 2635 int use_timer, int req_flags)
1da177e4
LT		 2636{
2637 struct zfcp_fsf_req *fsf_req = NULL;
2638 struct fcp_cmnd_iu *fcp_cmnd_iu;
2639 unsigned int sbtype;
2640 unsigned long lock_flags;
2641 int real_bytes = 0;
2642 int retval = 0;
2643 int mask;
2644
2645 /* setup new FSF request */
2646 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2647 adapter->pool.fsf_req_scsi,
2648 &lock_flags, &fsf_req);
553448f6 2649 if (unlikely(retval < 0))
1da177e4 2650 goto failed_req_create;
1da177e4 2651
ba172420
CS		 2652 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
2653 &unit->status))) {
2654 retval = -EBUSY;
2655 goto unit_blocked;
2656 }
2657
059c97d0
AH		 2658 zfcp_unit_get(unit);
2659 fsf_req->unit = unit;
1da177e4 2660
059c97d0 2661 /* associate FSF request with SCSI request (for look up on abort) */
4eff4a36 2662 scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
059c97d0
AH		 2663
2664 /* associate SCSI command with FSF request */
2665 fsf_req->data = (unsigned long) scsi_cmnd;
1da177e4
LT		 2666
2667 /* set handles of unit and its parent port in QTCB */
2668 fsf_req->qtcb->header.lun_handle = unit->handle;
2669 fsf_req->qtcb->header.port_handle = unit->port->handle;
2670
2671 /* FSF does not define the structure of the FCP_CMND IU */
2672 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
2673 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
2674
2675 /*
2676 * set depending on data direction:
2677 * data direction bits in SBALE (SB Type)
2678 * data direction bits in QTCB
2679 * data direction bits in FCP_CMND IU
2680 */
2681 switch (scsi_cmnd->sc_data_direction) {
2682 case DMA_NONE:
1da177e4
LT		 2683 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2684 /*
2685 * FIXME(qdio):
2686 * what is the correct type for commands
2687 * without 'real' data buffers?
2688 */
2689 sbtype = SBAL_FLAGS0_TYPE_READ;
2690 break;
2691 case DMA_FROM_DEVICE:
1da177e4
LT		 2692 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2693 sbtype = SBAL_FLAGS0_TYPE_READ;
2694 fcp_cmnd_iu->rddata = 1;
2695 break;
2696 case DMA_TO_DEVICE:
1da177e4
LT		 2697 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2698 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2699 fcp_cmnd_iu->wddata = 1;
2700 break;
2701 case DMA_BIDIRECTIONAL:
1da177e4
LT		 2702 default:
2703 /*
2704 * dummy, catch this condition earlier
2705 * in zfcp_scsi_queuecommand
2706 */
2707 goto failed_scsi_cmnd;
2708 }
2709
2710 /* set FC service class in QTCB (3 per default) */
06506d00 2711 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4
LT		 2712
2713 /* set FCP_LUN in FCP_CMND IU in QTCB */
2714 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2715
2716 mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
2717
2718 /* set task attributes in FCP_CMND IU in QTCB */
2719 if (likely((scsi_cmnd->device->simple_tags) ||
2720 (atomic_test_mask(mask, &unit->status))))
2721 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2722 else
2723 fcp_cmnd_iu->task_attribute = UNTAGGED;
2724
2725 /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
553448f6 2726 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
1da177e4
LT		 2727 fcp_cmnd_iu->add_fcp_cdb_length
2728 = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4
LT		 2729 /*
2730 * copy SCSI CDB (including additional length, if any) to
2731 * FCP_CDB in FCP_CMND IU in QTCB
2732 */
2733 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
2734
2735 /* FCP CMND IU length in QTCB */
2736 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
2737 sizeof (struct fcp_cmnd_iu) +
2738 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
2739
2740 /* generate SBALEs from data buffer */
00bab910
SS		 2741 real_bytes = zfcp_qdio_sbals_from_sg(fsf_req, sbtype,
2742 scsi_sglist(scsi_cmnd),
2743 ZFCP_MAX_SBALS_PER_REQ);
1da177e4 2744 if (unlikely(real_bytes < 0)) {
553448f6 2745 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ)
2282f658 2746 retval = -EIO;
553448f6
CS		 2747 else {
2748 dev_err(&adapter->ccw_device->dev,
2749 "SCSI request too large. "
2750 "Shutting down unit 0x%016Lx on port "
2751 "0x%016Lx.\n", unit->fcp_lun,
2752 unit->port->wwpn);
1f6f7129 2753 zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req);
2282f658 2754 retval = -EINVAL;
1da177e4
LT		 2755 }
2756 goto no_fit;
2757 }
2758
2759 /* set length of FCP data length in FCP_CMND IU in QTCB */
2760 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
2761
2abbe866
AH		 2762 if (use_timer)
2763 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
2764
2765 retval = zfcp_fsf_req_send(fsf_req);
553448f6 2766 if (unlikely(retval < 0))
1da177e4 2767 goto send_failed;
1da177e4 2768
1da177e4
LT		 2769 goto success;
2770
2771 send_failed:
2772 no_fit:
2773 failed_scsi_cmnd:
059c97d0 2774 zfcp_unit_put(unit);
57b7658a 2775 unit_blocked:
1da177e4
LT		 2776 zfcp_fsf_req_free(fsf_req);
2777 fsf_req = NULL;
2778 scsi_cmnd->host_scribble = NULL;
2779 success:
2780 failed_req_create:
00bab910 2781 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4
LT		 2782 return retval;
2783}
2784
1da177e4
LT		 2785struct zfcp_fsf_req *
2786zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
2787 struct zfcp_unit *unit,
2788 u8 tm_flags, int req_flags)
2789{
2790 struct zfcp_fsf_req *fsf_req = NULL;
2791 int retval = 0;
2792 struct fcp_cmnd_iu *fcp_cmnd_iu;
2793 unsigned long lock_flags;
2794 volatile struct qdio_buffer_element *sbale;
2795
2796 /* setup new FSF request */
2797 retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2798 adapter->pool.fsf_req_scsi,
2799 &lock_flags, &fsf_req);
553448f6 2800 if (retval < 0)
1da177e4 2801 goto out;
1da177e4 2802
fdf23452
CS		 2803 if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
2804 &unit->status)))
2805 goto unit_blocked;
2806
1da177e4
LT		 2807 /*
2808 * Used to decide on proper handler in the return path,
2809 * could be either zfcp_fsf_send_fcp_command_task_handler or
2810 * zfcp_fsf_send_fcp_command_task_management_handler */
2811
2812 fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2813
2814 /*
2815 * hold a pointer to the unit being target of this
2816 * task management request
2817 */
059c97d0 2818 fsf_req->data = (unsigned long) unit;
1da177e4
LT		 2819
2820 /* set FSF related fields in QTCB */
2821 fsf_req->qtcb->header.lun_handle = unit->handle;
2822 fsf_req->qtcb->header.port_handle = unit->port->handle;
2823 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
06506d00 2824 fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
1da177e4
LT		 2825 fsf_req->qtcb->bottom.io.fcp_cmnd_length =
2826 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
2827
00bab910 2828 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 2829 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2830 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2831
2832 /* set FCP related fields in FCP_CMND IU in QTCB */
2833 fcp_cmnd_iu = (struct fcp_cmnd_iu *)
2834 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
2835 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2836 fcp_cmnd_iu->task_management_flags = tm_flags;
2837
2abbe866
AH		 2838 zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
2839 retval = zfcp_fsf_req_send(fsf_req);
fdf23452 2840 if (!retval)
1da177e4 2841 goto out;
1da177e4 2842
fdf23452
CS		 2843 unit_blocked:
2844 zfcp_fsf_req_free(fsf_req);
2845 fsf_req = NULL;
2846
1da177e4 2847 out:
00bab910 2848 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4
LT		 2849 return fsf_req;
2850}
2851
c9615858
CS		 2852static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2853{
2854 lat_rec->sum += lat;
2855 if (lat_rec->min > lat)
2856 lat_rec->min = lat;
2857 if (lat_rec->max < lat)
2858 lat_rec->max = lat;
2859}
2860
2861static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req)
2862{
2863 struct fsf_qual_latency_info *lat_inf;
2864 struct latency_cont *lat;
2865 struct zfcp_unit *unit;
2866 unsigned long flags;
2867
2868 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2869 unit = fsf_req->unit;
2870
2871 switch (fsf_req->qtcb->bottom.io.data_direction) {
2872 case FSF_DATADIR_READ:
2873 lat = &unit->latencies.read;
2874 break;
2875 case FSF_DATADIR_WRITE:
2876 lat = &unit->latencies.write;
2877 break;
2878 case FSF_DATADIR_CMND:
2879 lat = &unit->latencies.cmd;
2880 break;
2881 default:
2882 return;
2883 }
2884
2885 spin_lock_irqsave(&unit->latencies.lock, flags);
2886 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2887 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2888 lat->counter++;
2889 spin_unlock_irqrestore(&unit->latencies.lock, flags);
2890}
2891
1da177e4
LT		 2892/*
2893 * function: zfcp_fsf_send_fcp_command_handler
2894 *
2895 * purpose: is called for finished Send FCP Command
2896 *
41fa2ada 2897 * returns:
1da177e4
LT		 2898 */
2899static int
2900zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
2901{
2902 int retval = -EINVAL;
2903 struct zfcp_unit *unit;
2904 struct fsf_qtcb_header *header;
1da177e4
LT		 2905
2906 header = &fsf_req->qtcb->header;
2907
2908 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
059c97d0 2909 unit = (struct zfcp_unit *) fsf_req->data;
1da177e4 2910 else
059c97d0 2911 unit = fsf_req->unit;
1da177e4
LT		 2912
2913 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
2914 /* go directly to calls of special handlers */
2915 goto skip_fsfstatus;
2916 }
2917
2918 /* evaluate FSF status in QTCB */
2919 switch (header->fsf_status) {
2920
2921 case FSF_PORT_HANDLE_NOT_VALID:
1f6f7129 2922 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req);
1da177e4
LT		 2923 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2924 break;
2925
2926 case FSF_LUN_HANDLE_NOT_VALID:
1f6f7129 2927 zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req);
1da177e4
LT		 2928 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2929 break;
2930
2931 case FSF_HANDLE_MISMATCH:
1f6f7129 2932 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req);
1da177e4
LT		 2933 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2934 break;
2935
2936 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
553448f6 2937 zfcp_fsf_class_not_supp(fsf_req);
1da177e4
LT		 2938 break;
2939
2940 case FSF_FCPLUN_NOT_VALID:
1f6f7129 2941 zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req);
1da177e4
LT		 2942 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2943 break;
2944
2945 case FSF_ACCESS_DENIED:
553448f6 2946 zfcp_fsf_access_denied_unit(fsf_req, unit);
1da177e4
LT		 2947 break;
2948
2949 case FSF_DIRECTION_INDICATOR_NOT_VALID:
553448f6
CS		 2950 dev_err(&fsf_req->adapter->ccw_device->dev,
2951 "Invalid data direction (%d) given for unit 0x%016Lx "
2952 "on port 0x%016Lx, shutting down adapter.\n",
2953 fsf_req->qtcb->bottom.io.data_direction,
2954 unit->fcp_lun, unit->port->wwpn);
1f6f7129 2955 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req);
1da177e4
LT		 2956 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2957 break;
2958
2959 case FSF_CMND_LENGTH_NOT_VALID:
553448f6
CS		 2960 dev_err(&fsf_req->adapter->ccw_device->dev,
2961 "An invalid control-data-block length field (%d) "
2962 "was found in a command for unit 0x%016Lx on port "
2963 "0x%016Lx. Shutting down adapter.\n",
2964 fsf_req->qtcb->bottom.io.fcp_cmnd_length,
2965 unit->fcp_lun, unit->port->wwpn);
1f6f7129 2966 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req);
1da177e4
LT		 2967 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2968 break;
2969
2970 case FSF_PORT_BOXED:
1f6f7129 2971 zfcp_erp_port_boxed(unit->port, 53, fsf_req);
1da177e4
LT		 2972 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2973 ZFCP_STATUS_FSFREQ_RETRY;
2974 break;
2975
2976 case FSF_LUN_BOXED:
1f6f7129 2977 zfcp_erp_unit_boxed(unit, 54, fsf_req);
1da177e4
LT		 2978 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
2979 | ZFCP_STATUS_FSFREQ_RETRY;
2980 break;
2981
2982 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 2983 switch (header->fsf_status_qual.word[0]) {
2984 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 2985 /* re-establish link to port */
65a8d4e1 2986 zfcp_test_link(unit->port);
1da177e4
LT		 2987 break;
2988 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4
LT		 2989 /* FIXME(hw) need proper specs for proper action */
2990 /* let scsi stack deal with retries and escalation */
1da177e4 2991 break;
1da177e4 2992 }
516a4201 2993 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2994 break;
2995
2996 case FSF_GOOD:
1da177e4
LT		 2997 break;
2998
2999 case FSF_FCP_RSP_AVAILABLE:
1da177e4 3000 break;
1da177e4
LT		 3001 }
3002
3003 skip_fsfstatus:
3004 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
3005 retval =
3006 zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
3007 } else {
3008 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
059c97d0
AH		 3009 fsf_req->unit = NULL;
3010 zfcp_unit_put(unit);
1da177e4
LT		 3011 }
3012 return retval;
3013}
3014
3015/*
3016 * function: zfcp_fsf_send_fcp_command_task_handler
3017 *
3018 * purpose: evaluates FCP_RSP IU
3019 *
41fa2ada 3020 * returns:
1da177e4
LT		 3021 */
3022static int
3023zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
3024{
3025 int retval = 0;
3026 struct scsi_cmnd *scpnt;
3027 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3028 &(fsf_req->qtcb->bottom.io.fcp_rsp);
1da177e4 3029 u32 sns_len;
f76af7d7 3030 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 3031 unsigned long flags;
1da177e4
LT		 3032
3033 read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
059c97d0 3034 scpnt = (struct scsi_cmnd *) fsf_req->data;
553448f6 3035 if (unlikely(!scpnt))
1da177e4 3036 goto out;
553448f6 3037
1da177e4
LT		 3038 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
3039 /* FIXME: (design) mid-layer should handle DID_ABORT like
3040 * DID_SOFT_ERROR by retrying the request for devices
3041 * that allow retries.
3042 */
feac6a07
MP		 3043 set_host_byte(scpnt, DID_SOFT_ERROR);
3044 set_driver_byte(scpnt, SUGGEST_RETRY);
1da177e4
LT		 3045 goto skip_fsfstatus;
3046 }
3047
3048 if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 3049 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 3050 goto skip_fsfstatus;
3051 }
3052
3053 /* set message byte of result in SCSI command */
feac6a07 3054 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4
LT		 3055
3056 /*
3057 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
3058 * of result in SCSI command
3059 */
3060 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 3061
c9615858
CS		 3062 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
3063 zfcp_fsf_req_latency(fsf_req);
3064
1da177e4
LT		 3065 /* check FCP_RSP_INFO */
3066 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
1da177e4
LT		 3067 switch (fcp_rsp_info[3]) {
3068 case RSP_CODE_GOOD:
1da177e4 3069 /* ok, continue */
feac6a07 3070 set_host_byte(scpnt, DID_OK);
1da177e4
LT		 3071 break;
3072 case RSP_CODE_LENGTH_MISMATCH:
1da177e4 3073 /* hardware bug */
feac6a07 3074 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 3075 goto skip_fsfstatus;
3076 case RSP_CODE_FIELD_INVALID:
1da177e4 3077 /* driver or hardware bug */
feac6a07 3078 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 3079 goto skip_fsfstatus;
3080 case RSP_CODE_RO_MISMATCH:
1da177e4 3081 /* hardware bug */
feac6a07 3082 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 3083 goto skip_fsfstatus;
3084 default:
553448f6 3085 /* invalid FCP response code */
feac6a07 3086 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 3087 goto skip_fsfstatus;
1da177e4
LT		 3088 }
3089 }
3090
3091 /* check for sense data */
3092 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
3093 sns_len = FSF_FCP_RSP_SIZE -
3094 sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
1da177e4 3095 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 3096 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 3097
9d058ecf 3098 memcpy(scpnt->sense_buffer,
1da177e4 3099 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 3100 }
3101
3102 /* check for underrun */
3103 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 3104 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
3105 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
3106 scpnt->underflow)
feac6a07 3107 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 3108 }
3109
3110 skip_fsfstatus:
8a36e453 3111 if (scpnt->result != 0)
ed829ad6 3112 zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
8a36e453 3113 else if (scpnt->retries > 0)
ed829ad6 3114 zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
8a36e453 3115 else
ed829ad6 3116 zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
1da177e4
LT		 3117
3118 /* cleanup pointer (need this especially for abort) */
3119 scpnt->host_scribble = NULL;
3120
1da177e4 3121 /* always call back */
1da177e4
LT		 3122 (scpnt->scsi_done) (scpnt);
3123
3124 /*
3125 * We must hold this lock until scsi_done has been called.
3126 * Otherwise we may call scsi_done after abort regarding this
3127 * command has completed.
3128 * Note: scsi_done must not block!
3129 */
3130 out:
3131 read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
3132 return retval;
3133}
3134
3135/*
3136 * function: zfcp_fsf_send_fcp_command_task_management_handler
3137 *
3138 * purpose: evaluates FCP_RSP IU
3139 *
41fa2ada 3140 * returns:
1da177e4
LT		 3141 */
3142static int
3143zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
3144{
3145 int retval = 0;
3146 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
3147 &(fsf_req->qtcb->bottom.io.fcp_rsp);
f76af7d7 3148 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 3149
1da177e4
LT		 3150 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3151 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
3152 goto skip_fsfstatus;
3153 }
3154
3155 /* check FCP_RSP_INFO */
3156 switch (fcp_rsp_info[3]) {
3157 case RSP_CODE_GOOD:
1da177e4 3158 /* ok, continue */
1da177e4
LT		 3159 break;
3160 case RSP_CODE_TASKMAN_UNSUPP:
1da177e4
LT		 3161 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
3162 break;
3163 case RSP_CODE_TASKMAN_FAILED:
1da177e4
LT		 3164 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
3165 break;
3166 default:
553448f6 3167 /* invalid FCP response code */
1da177e4
LT		 3168 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
3169 }
3170
3171 skip_fsfstatus:
3172 return retval;
3173}
3174
3175
3176/*
3177 * function: zfcp_fsf_control_file
3178 *
3179 * purpose: Initiator of the control file upload/download FSF requests
3180 *
3181 * returns: 0 - FSF request is successfuly created and queued
3182 * -EOPNOTSUPP - The FCP adapter does not have Control File support
3183 * -EINVAL - Invalid direction specified
3184 * -ENOMEM - Insufficient memory
3185 * -EPERM - Cannot create FSF request or place it in QDIO queue
3186 */
45633fdc
CS		 3187struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
3188 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4
LT		 3189{
3190 struct zfcp_fsf_req *fsf_req;
3191 struct fsf_qtcb_bottom_support *bottom;
3192 volatile struct qdio_buffer_element *sbale;
1da177e4 3193 unsigned long lock_flags;
1da177e4 3194 int direction;
45633fdc
CS		 3195 int retval;
3196 int bytes;
1da177e4 3197
45633fdc
CS		 3198 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
3199 return ERR_PTR(-EOPNOTSUPP);
1da177e4 3200
45633fdc 3201 switch (fsf_cfdc->command) {
1da177e4
LT		 3202 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
3203 direction = SBAL_FLAGS0_TYPE_WRITE;
1da177e4 3204 break;
1da177e4
LT		 3205 case FSF_QTCB_UPLOAD_CONTROL_FILE:
3206 direction = SBAL_FLAGS0_TYPE_READ;
3207 break;
1da177e4 3208 default:
45633fdc 3209 return ERR_PTR(-EINVAL);
1da177e4
LT		 3210 }
3211
45633fdc
CS		 3212 retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command,
3213 ZFCP_WAIT_FOR_SBAL,
1da177e4
LT		 3214 NULL, &lock_flags, &fsf_req);
3215 if (retval < 0) {
1da177e4
LT		 3216 retval = -EPERM;
3217 goto unlock_queue_lock;
3218 }
3219
00bab910 3220 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 3221 sbale[0].flags |= direction;
3222
3223 bottom = &fsf_req->qtcb->bottom.support;
3224 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
45633fdc
CS		 3225 bottom->option = fsf_cfdc->option;
3226
3227 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
00bab910 3228 fsf_cfdc->sg,
45633fdc
CS		 3229 ZFCP_MAX_SBALS_PER_REQ);
3230 if (bytes != ZFCP_CFDC_MAX_SIZE) {
3231 retval = -ENOMEM;
3232 goto free_fsf_req;
3233 }
1da177e4 3234
2abbe866
AH		 3235 zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
3236 retval = zfcp_fsf_req_send(fsf_req);
1da177e4 3237 if (retval < 0) {
1da177e4
LT		 3238 retval = -EPERM;
3239 goto free_fsf_req;
3240 }
00bab910 3241 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
1da177e4 3242
1da177e4
LT		 3243 wait_event(fsf_req->completion_wq,
3244 fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
3245
45633fdc 3246 return fsf_req;
1da177e4
LT		 3247
3248 free_fsf_req:
3249 zfcp_fsf_req_free(fsf_req);
3250 unlock_queue_lock:
00bab910 3251 write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
45633fdc 3252 return ERR_PTR(retval);
1da177e4
LT		 3253}
3254
45633fdc 3255static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
1da177e4 3256{
45633fdc 3257 if (fsf_req->qtcb->header.fsf_status != FSF_GOOD)
1da177e4 3258 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 3259}
3260
1da177e4
LT		 3261static inline int
3262zfcp_fsf_req_sbal_check(unsigned long *flags,
3263 struct zfcp_qdio_queue *queue, int needed)
3264{
00bab910
SS		 3265 write_lock_irqsave(&queue->lock, *flags);
3266 if (likely(atomic_read(&queue->count) >= needed))
1da177e4 3267 return 1;
00bab910 3268 write_unlock_irqrestore(&queue->lock, *flags);
1da177e4
LT		 3269 return 0;
3270}
3271
3272/*
3273 * set qtcb pointer in fsf_req and initialize QTCB
3274 */
4d284cac 3275static void
8a36e453 3276zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 3277{
3278 if (likely(fsf_req->qtcb != NULL)) {
fea9d6c7
VS		 3279 fsf_req->qtcb->prefix.req_seq_no =
3280 fsf_req->adapter->fsf_req_seq_no;
3281 fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
1da177e4 3282 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
fea9d6c7
VS		 3283 fsf_req->qtcb->prefix.qtcb_type =
3284 fsf_qtcb_type[fsf_req->fsf_command];
1da177e4 3285 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
fea9d6c7 3286 fsf_req->qtcb->header.req_handle = fsf_req->req_id;
8a36e453 3287 fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
1da177e4
LT		 3288 }
3289}
3290
3291/**
3292 * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
3293 * @adapter: adapter for which request queue is examined
3294 * @req_flags: flags indicating whether to wait for needed SBAL or not
3295 * @lock_flags: lock_flags if queue_lock is taken
3296 * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
00bab910 3297 * Locks: lock adapter->req_q->lock on success
1da177e4
LT		 3298 */
3299static int
3300zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
3301 unsigned long *lock_flags)
3302{
3303 long ret;
00bab910 3304 struct zfcp_qdio_queue *req_q = &adapter->req_q;
1da177e4
LT		 3305
3306 if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
3307 ret = wait_event_interruptible_timeout(adapter->request_wq,
00bab910 3308 zfcp_fsf_req_sbal_check(lock_flags, req_q, 1),
1da177e4
LT		 3309 ZFCP_SBAL_TIMEOUT);
3310 if (ret < 0)
3311 return ret;
3312 if (!ret)
3313 return -EIO;
00bab910 3314 } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_q, 1))
1da177e4
LT		 3315 return -EIO;
3316
3317 return 0;
3318}
3319
3320/*
3321 * function: zfcp_fsf_req_create
3322 *
3323 * purpose: create an FSF request at the specified adapter and
3324 * setup common fields
3325 *
3326 * returns: -ENOMEM if there was insufficient memory for a request
3327 * -EIO if no qdio buffers could be allocate to the request
3328 * -EINVAL/-EPERM on bug conditions in req_dequeue
3329 * 0 in success
3330 *
3331 * note: The created request is returned by reference.
3332 *
3333 * locks: lock of concerned request queue must not be held,
3334 * but is held on completion (write, irqsave)
3335 */
3336int
3337zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
3338 mempool_t *pool, unsigned long *lock_flags,
3339 struct zfcp_fsf_req **fsf_req_p)
3340{
3341 volatile struct qdio_buffer_element *sbale;
3342 struct zfcp_fsf_req *fsf_req = NULL;
3343 int ret = 0;
00bab910 3344 struct zfcp_qdio_queue *req_q = &adapter->req_q;
1da177e4
LT		 3345
3346 /* allocate new FSF request */
3347 fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
553448f6 3348 if (unlikely(!fsf_req)) {
1da177e4
LT		 3349 ret = -ENOMEM;
3350 goto failed_fsf_req;
3351 }
3352
8a36e453
MS		 3353 fsf_req->adapter = adapter;
3354 fsf_req->fsf_command = fsf_cmd;
fea9d6c7 3355 INIT_LIST_HEAD(&fsf_req->list);
2abbe866 3356 init_timer(&fsf_req->timer);
1da177e4 3357
41fa2ada 3358 /* initialize waitqueue which may be used to wait on
1da177e4
LT		 3359 this request completion */
3360 init_waitqueue_head(&fsf_req->completion_wq);
3361
3362 ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
801e0ced 3363 if (ret < 0)
1da177e4 3364 goto failed_sbals;
801e0ced
CS		 3365
3366 /* this is serialized (we are holding req_queue-lock of adapter) */
3367 if (adapter->req_no == 0)
3368 adapter->req_no++;
3369 fsf_req->req_id = adapter->req_no++;
3370
3371 zfcp_fsf_req_qtcb_init(fsf_req);
1da177e4
LT		 3372
3373 /*
3374 * We hold queue_lock here. Check if QDIOUP is set and let request fail
3375 * if it is not set (see also *_open_qdio and *_close_qdio).
3376 */
3377
3378 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
00bab910 3379 write_unlock_irqrestore(&req_q->lock, *lock_flags);
1da177e4
LT		 3380 ret = -EIO;
3381 goto failed_sbals;
3382 }
3383
8a36e453
MS		 3384 if (fsf_req->qtcb) {
3385 fsf_req->seq_no = adapter->fsf_req_seq_no;
3386 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
3387 }
1da177e4 3388 fsf_req->sbal_number = 1;
00bab910
SS		 3389 fsf_req->sbal_first = req_q->first;
3390 fsf_req->sbal_last = req_q->first;
1da177e4
LT		 3391 fsf_req->sbale_curr = 1;
3392
3393 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
3394 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
3395 }
3396
00bab910 3397 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4
LT		 3398
3399 /* setup common SBALE fields */
fea9d6c7 3400 sbale[0].addr = (void *) fsf_req->req_id;
1da177e4
LT		 3401 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
3402 if (likely(fsf_req->qtcb != NULL)) {
3403 sbale[1].addr = (void *) fsf_req->qtcb;
3404 sbale[1].length = sizeof(struct fsf_qtcb);
3405 }
3406
1da177e4
LT		 3407 goto success;
3408
3409 failed_sbals:
3410/* dequeue new FSF request previously enqueued */
3411 zfcp_fsf_req_free(fsf_req);
3412 fsf_req = NULL;
3413
3414 failed_fsf_req:
00bab910 3415 write_lock_irqsave(&req_q->lock, *lock_flags);
1da177e4
LT		 3416 success:
3417 *fsf_req_p = fsf_req;
3418 return ret;
3419}
3420
3421/*
3422 * function: zfcp_fsf_req_send
3423 *
3424 * purpose: start transfer of FSF request via QDIO
3425 *
3426 * returns: 0 - request transfer succesfully started
3427 * !0 - start of request transfer failed
3428 */
2abbe866 3429static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
1da177e4
LT		 3430{
3431 struct zfcp_adapter *adapter;
00bab910 3432 struct zfcp_qdio_queue *req_q;
1da177e4 3433 volatile struct qdio_buffer_element *sbale;
8a36e453 3434 int inc_seq_no;
1da177e4
LT		 3435 int retval = 0;
3436
3437 adapter = fsf_req->adapter;
00bab910 3438 req_q = &adapter->req_q;
1da177e4 3439
00bab910 3440 sbale = zfcp_qdio_sbale_req(fsf_req);
1da177e4 3441
fea9d6c7
VS		 3442 /* put allocated FSF request into hash table */
3443 spin_lock(&adapter->req_list_lock);
3444 zfcp_reqlist_add(adapter, fsf_req);
3445 spin_unlock(&adapter->req_list_lock);
1da177e4 3446
8a36e453
MS		 3447 inc_seq_no = (fsf_req->qtcb != NULL);
3448
8a36e453
MS		 3449 fsf_req->issued = get_clock();
3450
00bab910 3451 retval = zfcp_qdio_send(fsf_req);
1da177e4
LT		 3452
3453 if (unlikely(retval)) {
3454 /* Queues are down..... */
2abbe866 3455 del_timer(&fsf_req->timer);
fea9d6c7 3456 spin_lock(&adapter->req_list_lock);
ca2d02c2 3457 zfcp_reqlist_remove(adapter, fsf_req);
fea9d6c7
VS		 3458 spin_unlock(&adapter->req_list_lock);
3459 /* undo changes in request queue made for this request */
00bab910
SS		 3460 atomic_add(fsf_req->sbal_number, &req_q->count);
3461 req_q->first -= fsf_req->sbal_number;
3462 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
3463 req_q->first %= QDIO_MAX_BUFFERS_PER_Q;
1f6f7129 3464 zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req);
00bab910 3465 retval = -EIO;
1da177e4 3466 } else {
1da177e4
LT		 3467 /*
3468 * increase FSF sequence counter -
3469 * this must only be done for request successfully enqueued to
3470 * QDIO this rejected requests may be cleaned up by calling
3471 * routines resulting in missing sequence counter values
3472 * otherwise,
3473 */
8a36e453 3474
1da177e4 3475 /* Don't increase for unsolicited status */
8a36e453 3476 if (inc_seq_no)
1da177e4 3477 adapter->fsf_req_seq_no++;
1da177e4
LT		 3478 }
3479 return retval;
3480}
kernel source for telekom puls (alcatel/mediatek)