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[SCSI] zfcp: put threshold data in hba trace
[mirror_ubuntu-bionic-kernel.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
287ac01a
CS		 11static void zfcp_fsf_request_timeout_handler(unsigned long data)
12{
13 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
14 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
15 NULL);
16}
17
18static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
19 unsigned long timeout)
20{
21 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
22 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
23 fsf_req->timer.expires = jiffies + timeout;
24 add_timer(&fsf_req->timer);
25}
26
27static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
28{
29 BUG_ON(!fsf_req->erp_action);
30 fsf_req->timer.function = zfcp_erp_timeout_handler;
31 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
32 fsf_req->timer.expires = jiffies + 30 * HZ;
33 add_timer(&fsf_req->timer);
34}
35
1da177e4
LT		 36/* association between FSF command and FSF QTCB type */
37static u32 fsf_qtcb_type[] = {
38 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
39 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
40 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
41 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
42 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
43 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
48 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
49 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
51};
52
553448f6
CS		 53static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
54{
c41f8cbd 55 u16 subtable = table >> 16;
553448f6 56 u16 rule = table & 0xffff;
ff3b24fa 57 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
553448f6 58
ff3b24fa 59 if (subtable && subtable < ARRAY_SIZE(act_type))
553448f6 60 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 61 "Access denied according to ACT rule type %s, "
62 "rule %d\n", act_type[subtable], rule);
553448f6
CS		 63}
64
65static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
66 struct zfcp_port *port)
67{
68 struct fsf_qtcb_header *header = &req->qtcb->header;
69 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 70 "Access denied to port 0x%016Lx\n",
7ba58c9c 71 (unsigned long long)port->wwpn);
553448f6
CS		 72 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
73 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
74 zfcp_erp_port_access_denied(port, 55, req);
75 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
76}
77
78static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
79 struct zfcp_unit *unit)
80{
81 struct fsf_qtcb_header *header = &req->qtcb->header;
82 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 83 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 84 (unsigned long long)unit->fcp_lun,
85 (unsigned long long)unit->port->wwpn);
553448f6
CS		 86 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
87 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
88 zfcp_erp_unit_access_denied(unit, 59, req);
89 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
90}
91
92static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
93{
ff3b24fa
CS		 94 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
95 "operational because of an unsupported FC class\n");
553448f6
CS		 96 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
97 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
98}
99
c41f8cbd
SS		 100/**
101 * zfcp_fsf_req_free - free memory used by fsf request
102 * @fsf_req: pointer to struct zfcp_fsf_req
1da177e4 103 */
c41f8cbd 104void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
1da177e4 105{
c41f8cbd
SS		 106 if (likely(req->pool)) {
107 mempool_free(req, req->pool);
dd52e0ea
HC		 108 return;
109 }
110
c41f8cbd
SS		 111 if (req->qtcb) {
112 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
dd52e0ea
HC		 113 return;
114 }
1da177e4
LT		 115}
116
c41f8cbd
SS		 117/**
118 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
119 * @adapter: pointer to struct zfcp_adapter
120 *
869b2b44
MP		 121 * Never ever call this without shutting down the adapter first.
122 * Otherwise the adapter would continue using and corrupting s390 storage.
123 * Included BUG_ON() call to ensure this is done.
124 * ERP is supposed to be the only user of this function.
1da177e4 125 */
6fcc4711 126void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
1da177e4 127{
c41f8cbd 128 struct zfcp_fsf_req *req, *tmp;
fea9d6c7 129 unsigned long flags;
6fcc4711 130 LIST_HEAD(remove_queue);
869b2b44 131 unsigned int i;
fea9d6c7 132
c41f8cbd 133 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
fea9d6c7 134 spin_lock_irqsave(&adapter->req_list_lock, flags);
869b2b44 135 for (i = 0; i < REQUEST_LIST_SIZE; i++)
6fcc4711 136 list_splice_init(&adapter->req_list[i], &remove_queue);
fea9d6c7
VS		 137 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
138
c41f8cbd
SS		 139 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
140 list_del(&req->list);
141 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
142 zfcp_fsf_req_complete(req);
1da177e4 143 }
1da177e4
LT		 144}
145
c41f8cbd 146static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
1da177e4 147{
c41f8cbd
SS		 148 struct fsf_status_read_buffer *sr_buf = req->data;
149 struct zfcp_adapter *adapter = req->adapter;
150 struct zfcp_port *port;
151 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
152 unsigned long flags;
1da177e4 153
c41f8cbd
SS		 154 read_lock_irqsave(&zfcp_data.config_lock, flags);
155 list_for_each_entry(port, &adapter->port_list_head, list)
156 if (port->d_id == d_id) {
157 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
158 switch (sr_buf->status_subtype) {
159 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
160 zfcp_erp_port_reopen(port, 0, 101, req);
161 break;
162 case FSF_STATUS_READ_SUB_ERROR_PORT:
163 zfcp_erp_port_shutdown(port, 0, 122, req);
164 break;
165 }
166 return;
167 }
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1da177e4
LT		 169}
170
c41f8cbd
SS		 171static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
172 struct fsf_link_down_info *link_down)
aef4a983 173{
c41f8cbd 174 struct zfcp_adapter *adapter = req->adapter;
698ec016 175
c41f8cbd 176 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
ee69ab7a
MS		 177 return;
178
179 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
180
c41f8cbd 181 if (!link_down)
2f8f3ed5 182 goto out;
ee69ab7a 183
aef4a983
MS		 184 switch (link_down->error_code) {
185 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 186 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 187 "There is no light signal from the local "
188 "fibre channel cable\n");
aef4a983
MS		 189 break;
190 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 191 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 192 "There is a wrap plug instead of a fibre "
193 "channel cable\n");
aef4a983
MS		 194 break;
195 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 196 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 197 "The adjacent fibre channel node does not "
198 "support FCP\n");
aef4a983
MS		 199 break;
200 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 201 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 202 "The FCP device is suspended because of a "
203 "firmware update\n");
553448f6 204 break;
aef4a983 205 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 206 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 207 "The FCP device detected a WWPN that is "
208 "duplicate or not valid\n");
aef4a983
MS		 209 break;
210 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 211 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 212 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 213 break;
214 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 215 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 216 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 217 break;
218 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 219 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 220 "The adjacent switch cannot support "
221 "more NPIV ports\n");
aef4a983
MS		 222 break;
223 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 224 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 225 "The FCP adapter could not log in to the "
226 "fibre channel fabric\n");
aef4a983
MS		 227 break;
228 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 229 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 230 "The WWPN assignment file on the FCP adapter "
231 "has been damaged\n");
aef4a983
MS		 232 break;
233 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 234 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 235 "The mode table on the FCP adapter "
236 "has been damaged\n");
aef4a983
MS		 237 break;
238 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 239 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 240 "All NPIV ports on the FCP adapter have "
241 "been assigned\n");
aef4a983
MS		 242 break;
243 default:
c41f8cbd 244 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 245 "The link between the FCP adapter and "
246 "the FC fabric is down\n");
aef4a983 247 }
c41f8cbd
SS		 248out:
249 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 250}
251
c41f8cbd 252static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 253{
c41f8cbd
SS		 254 struct fsf_status_read_buffer *sr_buf = req->data;
255 struct fsf_link_down_info *ldi =
256 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 257
c41f8cbd
SS		 258 switch (sr_buf->status_subtype) {
259 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
c41f8cbd 260 zfcp_fsf_link_down_info_eval(req, 38, ldi);
1da177e4 261 break;
c41f8cbd 262 case FSF_STATUS_READ_SUB_FDISC_FAILED:
c41f8cbd 263 zfcp_fsf_link_down_info_eval(req, 39, ldi);
1da177e4 264 break;
c41f8cbd 265 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
c41f8cbd
SS		 266 zfcp_fsf_link_down_info_eval(req, 40, NULL);
267 };
268}
1da177e4 269
c41f8cbd
SS		 270static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
271{
272 struct zfcp_adapter *adapter = req->adapter;
273 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 274
c41f8cbd
SS		 275 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
276 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
277 mempool_free(sr_buf, adapter->pool.data_status_read);
278 zfcp_fsf_req_free(req);
279 return;
280 }
1da177e4 281
c41f8cbd 282 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
1da177e4 283
c41f8cbd
SS		 284 switch (sr_buf->status_type) {
285 case FSF_STATUS_READ_PORT_CLOSED:
286 zfcp_fsf_status_read_port_closed(req);
1da177e4 287 break;
c41f8cbd
SS		 288 case FSF_STATUS_READ_INCOMING_ELS:
289 zfcp_fc_incoming_els(req);
1da177e4 290 break;
c41f8cbd 291 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 292 break;
c41f8cbd 293 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 294 dev_warn(&adapter->ccw_device->dev,
295 "The error threshold for checksum statistics "
296 "has been exceeded\n");
57069386 297 zfcp_hba_dbf_event_berr(adapter, req);
1da177e4 298 break;
c41f8cbd
SS		 299 case FSF_STATUS_READ_LINK_DOWN:
300 zfcp_fsf_status_read_link_down(req);
301 break;
302 case FSF_STATUS_READ_LINK_UP:
303 dev_info(&adapter->ccw_device->dev,
ff3b24fa 304 "The local link has been restored\n");
c41f8cbd
SS		 305 /* All ports should be marked as ready to run again */
306 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
307 ZFCP_STATUS_COMMON_RUNNING,
308 ZFCP_SET);
309 zfcp_erp_adapter_reopen(adapter,
310 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
311 ZFCP_STATUS_COMMON_ERP_FAILED,
312 102, req);
313 break;
314 case FSF_STATUS_READ_NOTIFICATION_LOST:
315 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
316 zfcp_erp_adapter_access_changed(adapter, 135, req);
317 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
318 schedule_work(&adapter->scan_work);
319 break;
320 case FSF_STATUS_READ_CFDC_UPDATED:
321 zfcp_erp_adapter_access_changed(adapter, 136, req);
322 break;
323 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
324 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 325 break;
1da177e4
LT		 326 }
327
c41f8cbd
SS		 328 mempool_free(sr_buf, adapter->pool.data_status_read);
329 zfcp_fsf_req_free(req);
1da177e4 330
c41f8cbd
SS		 331 atomic_inc(&adapter->stat_miss);
332 schedule_work(&adapter->stat_work);
333}
1da177e4 334
c41f8cbd
SS		 335static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
336{
337 switch (req->qtcb->header.fsf_status_qual.word[0]) {
338 case FSF_SQ_FCP_RSP_AVAILABLE:
339 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
340 case FSF_SQ_NO_RETRY_POSSIBLE:
341 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
342 return;
343 case FSF_SQ_COMMAND_ABORTED:
344 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
345 break;
346 case FSF_SQ_NO_RECOM:
347 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 348 "The FCP adapter reported a problem "
349 "that cannot be recovered\n");
c41f8cbd
SS		 350 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
351 break;
352 }
353 /* all non-return stats set FSFREQ_ERROR*/
354 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 355}
356
c41f8cbd 357static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 358{
c41f8cbd
SS		 359 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
360 return;
1da177e4 361
c41f8cbd
SS		 362 switch (req->qtcb->header.fsf_status) {
363 case FSF_UNKNOWN_COMMAND:
364 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 365 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd
SS		 366 req->qtcb->header.fsf_command);
367 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
368 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
369 break;
370 case FSF_ADAPTER_STATUS_AVAILABLE:
371 zfcp_fsf_fsfstatus_qual_eval(req);
372 break;
373 }
374}
1da177e4 375
c41f8cbd
SS		 376static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
377{
378 struct zfcp_adapter *adapter = req->adapter;
379 struct fsf_qtcb *qtcb = req->qtcb;
380 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 381
c41f8cbd 382 zfcp_hba_dbf_event_fsf_response(req);
1da177e4 383
c41f8cbd
SS		 384 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
385 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
386 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
387 return;
388 }
1da177e4 389
c41f8cbd
SS		 390 switch (qtcb->prefix.prot_status) {
391 case FSF_PROT_GOOD:
392 case FSF_PROT_FSF_STATUS_PRESENTED:
393 return;
394 case FSF_PROT_QTCB_VERSION_ERROR:
395 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 396 "QTCB version 0x%x not supported by FCP adapter "
397 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
398 psq->word[0], psq->word[1]);
c41f8cbd
SS		 399 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
400 break;
401 case FSF_PROT_ERROR_STATE:
402 case FSF_PROT_SEQ_NUMB_ERROR:
403 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
404 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
405 break;
406 case FSF_PROT_UNSUPP_QTCB_TYPE:
407 dev_err(&adapter->ccw_device->dev,
ff3b24fa 408 "The QTCB type is not supported by the FCP adapter\n");
c41f8cbd
SS		 409 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
410 break;
411 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
412 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
413 &adapter->status);
414 break;
415 case FSF_PROT_DUPLICATE_REQUEST_ID:
416 dev_err(&adapter->ccw_device->dev,
ff3b24fa 417 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd
SS		 418 (unsigned long long)qtcb->bottom.support.req_handle);
419 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
420 break;
421 case FSF_PROT_LINK_DOWN:
422 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
423 /* FIXME: reopening adapter now? better wait for link up */
424 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
425 break;
426 case FSF_PROT_REEST_QUEUE:
427 /* All ports should be marked as ready to run again */
428 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
429 ZFCP_STATUS_COMMON_RUNNING,
430 ZFCP_SET);
431 zfcp_erp_adapter_reopen(adapter,
432 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
433 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
434 break;
435 default:
436 dev_err(&adapter->ccw_device->dev,
ff3b24fa 437 "0x%x is not a valid transfer protocol status\n",
c41f8cbd
SS		 438 qtcb->prefix.prot_status);
439 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
440 }
441 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 442}
443
c41f8cbd
SS		 444/**
445 * zfcp_fsf_req_complete - process completion of a FSF request
446 * @fsf_req: The FSF request that has been completed.
447 *
448 * When a request has been completed either from the FCP adapter,
449 * or it has been dismissed due to a queue shutdown, this function
450 * is called to process the completion status and trigger further
451 * events related to the FSF request.
452 */
453void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
1da177e4 454{
c41f8cbd
SS		 455 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
456 zfcp_fsf_status_read_handler(req);
457 return;
458 }
1da177e4 459
c41f8cbd
SS		 460 del_timer(&req->timer);
461 zfcp_fsf_protstatus_eval(req);
462 zfcp_fsf_fsfstatus_eval(req);
463 req->handler(req);
1da177e4 464
c41f8cbd 465 if (req->erp_action)
287ac01a 466 zfcp_erp_notify(req->erp_action, 0);
c41f8cbd 467 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
1da177e4 468
c41f8cbd
SS		 469 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
470 zfcp_fsf_req_free(req);
471 else
472 /* notify initiator waiting for the requests completion */
473 /*
474 * FIXME: Race! We must not access fsf_req here as it might have been
475 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
476 * flag. It's an improbable case. But, we have the same paranoia for
477 * the cleanup flag already.
478 * Might better be handled using complete()?
479 * (setting the flag and doing wakeup ought to be atomic
480 * with regard to checking the flag as long as waitqueue is
481 * part of the to be released structure)
482 */
483 wake_up(&req->completion_wq);
484}
1da177e4 485
c41f8cbd
SS		 486static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
487{
488 struct fsf_qtcb_bottom_config *bottom;
489 struct zfcp_adapter *adapter = req->adapter;
490 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 491
c41f8cbd 492 bottom = &req->qtcb->bottom.config;
1da177e4 493
c41f8cbd
SS		 494 if (req->data)
495 memcpy(req->data, bottom, sizeof(*bottom));
496
497 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
498 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
499 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
500 fc_host_speed(shost) = bottom->fc_link_speed;
501 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
502
503 adapter->hydra_version = bottom->adapter_type;
504 adapter->timer_ticks = bottom->timer_interval;
505
506 if (fc_host_permanent_port_name(shost) == -1)
507 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
508
509 switch (bottom->fc_topology) {
510 case FSF_TOPO_P2P:
511 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
512 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
513 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
514 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
c41f8cbd
SS		 515 break;
516 case FSF_TOPO_FABRIC:
517 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
c41f8cbd
SS		 518 break;
519 case FSF_TOPO_AL:
520 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
c41f8cbd 521 default:
c41f8cbd 522 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 523 "Unknown or unsupported arbitrated loop "
524 "fibre channel topology detected\n");
525 zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
c41f8cbd 526 return -EIO;
1da177e4 527 }
c41f8cbd 528
1da177e4
LT		 529 return 0;
530}
531
c41f8cbd 532static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
553448f6
CS		 533{
534 struct zfcp_adapter *adapter = req->adapter;
c41f8cbd
SS		 535 struct fsf_qtcb *qtcb = req->qtcb;
536 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
537 struct Scsi_Host *shost = adapter->scsi_host;
553448f6 538
c41f8cbd
SS		 539 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
540 return;
1da177e4 541
c41f8cbd
SS		 542 adapter->fsf_lic_version = bottom->lic_version;
543 adapter->adapter_features = bottom->adapter_features;
544 adapter->connection_features = bottom->connection_features;
545 adapter->peer_wwpn = 0;
546 adapter->peer_wwnn = 0;
547 adapter->peer_d_id = 0;
8a36e453 548
c41f8cbd
SS		 549 switch (qtcb->header.fsf_status) {
550 case FSF_GOOD:
551 if (zfcp_fsf_exchange_config_evaluate(req))
552 return;
1da177e4 553
c41f8cbd
SS		 554 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
555 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 556 "FCP adapter maximum QTCB size (%d bytes) "
557 "is too small\n",
558 bottom->max_qtcb_size);
c41f8cbd
SS		 559 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
560 return;
561 }
562 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
563 &adapter->status);
1da177e4 564 break;
c41f8cbd
SS		 565 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
566 fc_host_node_name(shost) = 0;
567 fc_host_port_name(shost) = 0;
568 fc_host_port_id(shost) = 0;
569 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
570 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
571 adapter->hydra_version = 0;
1da177e4 572
c41f8cbd
SS		 573 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
574 &adapter->status);
1da177e4 575
c41f8cbd
SS		 576 zfcp_fsf_link_down_info_eval(req, 42,
577 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 578 break;
c41f8cbd
SS		 579 default:
580 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
581 return;
582 }
1da177e4 583
c41f8cbd
SS		 584 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
585 adapter->hardware_version = bottom->hardware_version;
586 memcpy(fc_host_serial_number(shost), bottom->serial_number,
587 min(FC_SERIAL_NUMBER_SIZE, 17));
588 EBCASC(fc_host_serial_number(shost),
589 min(FC_SERIAL_NUMBER_SIZE, 17));
590 }
1da177e4 591
c41f8cbd
SS		 592 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
593 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 594 "The FCP adapter only supports newer "
595 "control block versions\n");
c41f8cbd
SS		 596 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
597 return;
598 }
599 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
600 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 601 "The FCP adapter only supports older "
602 "control block versions\n");
c41f8cbd
SS		 603 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
604 }
605}
1da177e4 606
c41f8cbd
SS		 607static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
608{
609 struct zfcp_adapter *adapter = req->adapter;
610 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
611 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 612
c41f8cbd
SS		 613 if (req->data)
614 memcpy(req->data, bottom, sizeof(*bottom));
9eb69aff 615
c41f8cbd
SS		 616 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
617 fc_host_permanent_port_name(shost) = bottom->wwpn;
618 else
619 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
620 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
621 fc_host_supported_speeds(shost) = bottom->supported_speed;
622}
1da177e4 623
c41f8cbd
SS		 624static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
625{
c41f8cbd
SS		 626 struct fsf_qtcb *qtcb = req->qtcb;
627
628 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
629 return;
630
631 switch (qtcb->header.fsf_status) {
632 case FSF_GOOD:
633 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 634 break;
635 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
636 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 637 zfcp_fsf_link_down_info_eval(req, 43,
638 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 639 break;
1da177e4 640 }
c41f8cbd 641}
d26ab06e 642
0406289e 643static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
c41f8cbd 644{
0406289e
CS		 645 struct zfcp_qdio_queue *req_q = &adapter->req_q;
646
647 spin_lock_bh(&adapter->req_q_lock);
648 if (atomic_read(&req_q->count))
c41f8cbd 649 return 1;
0406289e 650 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 651 return 0;
1da177e4
LT		 652}
653
2450d3e7
SR		 654static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
655{
656 unsigned int count = atomic_read(&adapter->req_q.count);
657 if (!count)
658 atomic_inc(&adapter->qdio_outb_full);
659 return count > 0;
660}
661
c41f8cbd
SS		 662static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
663{
664 long ret;
c41f8cbd 665
0406289e 666 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 667 ret = wait_event_interruptible_timeout(adapter->request_wq,
0406289e 668 zfcp_fsf_sbal_check(adapter), 5 * HZ);
c41f8cbd
SS		 669 if (ret > 0)
670 return 0;
2450d3e7
SR		 671 if (!ret)
672 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd 673
0406289e 674 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 675 return -EIO;
676}
677
678static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
679{
680 struct zfcp_fsf_req *req;
681 req = mempool_alloc(pool, GFP_ATOMIC);
682 if (!req)
683 return NULL;
684 memset(req, 0, sizeof(*req));
685 return req;
686}
687
688static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
689{
690 struct zfcp_fsf_req_qtcb *qtcb;
691
692 if (likely(pool))
693 qtcb = mempool_alloc(pool, GFP_ATOMIC);
694 else
695 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
696 GFP_ATOMIC);
697 if (unlikely(!qtcb))
698 return NULL;
699
700 memset(qtcb, 0, sizeof(*qtcb));
701 qtcb->fsf_req.qtcb = &qtcb->qtcb;
702 qtcb->fsf_req.pool = pool;
703
704 return &qtcb->fsf_req;
705}
706
707static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
708 u32 fsf_cmd, int req_flags,
709 mempool_t *pool)
1da177e4 710{
44cc76f2 711 struct qdio_buffer_element *sbale;
1da177e4 712
c41f8cbd
SS		 713 struct zfcp_fsf_req *req;
714 struct zfcp_qdio_queue *req_q = &adapter->req_q;
951f746f 715
c41f8cbd
SS		 716 if (req_flags & ZFCP_REQ_NO_QTCB)
717 req = zfcp_fsf_alloc_noqtcb(pool);
718 else
719 req = zfcp_fsf_alloc_qtcb(pool);
1da177e4 720
c41f8cbd
SS		 721 if (unlikely(!req))
722 return ERR_PTR(-EIO);
1da177e4 723
c41f8cbd
SS		 724 if (adapter->req_no == 0)
725 adapter->req_no++;
1da177e4 726
c41f8cbd
SS		 727 INIT_LIST_HEAD(&req->list);
728 init_timer(&req->timer);
729 init_waitqueue_head(&req->completion_wq);
1da177e4 730
c41f8cbd
SS		 731 req->adapter = adapter;
732 req->fsf_command = fsf_cmd;
733 req->req_id = adapter->req_no++;
734 req->sbal_number = 1;
735 req->sbal_first = req_q->first;
736 req->sbal_last = req_q->first;
737 req->sbale_curr = 1;
738
739 sbale = zfcp_qdio_sbale_req(req);
740 sbale[0].addr = (void *) req->req_id;
741 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
742
743 if (likely(req->qtcb)) {
744 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
745 req->qtcb->prefix.req_id = req->req_id;
746 req->qtcb->prefix.ulp_info = 26;
747 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
748 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
749 req->qtcb->header.req_handle = req->req_id;
750 req->qtcb->header.fsf_command = req->fsf_command;
751 req->seq_no = adapter->fsf_req_seq_no;
752 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
753 sbale[1].addr = (void *) req->qtcb;
754 sbale[1].length = sizeof(struct fsf_qtcb);
755 }
756
757 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
758 zfcp_fsf_req_free(req);
759 return ERR_PTR(-EIO);
760 }
951f746f 761
c41f8cbd
SS		 762 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
763 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1da177e4 764
c41f8cbd 765 return req;
1da177e4
LT		 766}
767
c41f8cbd
SS		 768static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
769{
770 struct zfcp_adapter *adapter = req->adapter;
771 struct zfcp_qdio_queue *req_q = &adapter->req_q;
772 int idx;
773
774 /* put allocated FSF request into hash table */
775 spin_lock(&adapter->req_list_lock);
776 idx = zfcp_reqlist_hash(req->req_id);
777 list_add_tail(&req->list, &adapter->req_list[idx]);
778 spin_unlock(&adapter->req_list_lock);
779
780 req->issued = get_clock();
781 if (zfcp_qdio_send(req)) {
782 /* Queues are down..... */
783 del_timer(&req->timer);
784 spin_lock(&adapter->req_list_lock);
785 zfcp_reqlist_remove(adapter, req);
786 spin_unlock(&adapter->req_list_lock);
787 /* undo changes in request queue made for this request */
788 atomic_add(req->sbal_number, &req_q->count);
789 req_q->first -= req->sbal_number;
790 req_q->first += QDIO_MAX_BUFFERS_PER_Q;
791 req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
792 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
793 return -EIO;
794 }
795
796 /* Don't increase for unsolicited status */
797 if (req->qtcb)
798 adapter->fsf_req_seq_no++;
799
800 return 0;
801}
802
803/**
804 * zfcp_fsf_status_read - send status read request
805 * @adapter: pointer to struct zfcp_adapter
806 * @req_flags: request flags
807 * Returns: 0 on success, ERROR otherwise
1da177e4 808 */
c41f8cbd 809int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
1da177e4 810{
c41f8cbd
SS		 811 struct zfcp_fsf_req *req;
812 struct fsf_status_read_buffer *sr_buf;
44cc76f2 813 struct qdio_buffer_element *sbale;
c41f8cbd 814 int retval = -EIO;
1da177e4 815
0406289e 816 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 817 if (zfcp_fsf_req_sbal_get(adapter))
818 goto out;
819
820 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
821 ZFCP_REQ_NO_QTCB,
822 adapter->pool.fsf_req_status_read);
025270f0 823 if (IS_ERR(req)) {
c41f8cbd
SS		 824 retval = PTR_ERR(req);
825 goto out;
1da177e4
LT		 826 }
827
c41f8cbd
SS		 828 sbale = zfcp_qdio_sbale_req(req);
829 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
830 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
831 req->sbale_curr = 2;
832
833 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
834 if (!sr_buf) {
835 retval = -ENOMEM;
836 goto failed_buf;
837 }
838 memset(sr_buf, 0, sizeof(*sr_buf));
839 req->data = sr_buf;
840 sbale = zfcp_qdio_sbale_curr(req);
841 sbale->addr = (void *) sr_buf;
842 sbale->length = sizeof(*sr_buf);
059c97d0 843
c41f8cbd
SS		 844 retval = zfcp_fsf_req_send(req);
845 if (retval)
846 goto failed_req_send;
1da177e4 847
c41f8cbd
SS		 848 goto out;
849
850failed_req_send:
851 mempool_free(sr_buf, adapter->pool.data_status_read);
852failed_buf:
853 zfcp_fsf_req_free(req);
854 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
855out:
0406289e 856 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 857 return retval;
858}
859
860static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
861{
862 struct zfcp_unit *unit = req->data;
863 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
864
865 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
866 return;
867
868 switch (req->qtcb->header.fsf_status) {
1da177e4 869 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 870 if (fsq->word[0] == fsq->word[1]) {
9467a9b3 871 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
c41f8cbd
SS		 872 req);
873 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 874 }
875 break;
1da177e4 876 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd
SS		 877 if (fsq->word[0] == fsq->word[1]) {
878 zfcp_erp_port_reopen(unit->port, 0, 105, req);
879 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 880 }
881 break;
1da177e4 882 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 883 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 884 break;
1da177e4 885 case FSF_PORT_BOXED:
c41f8cbd
SS		 886 zfcp_erp_port_boxed(unit->port, 47, req);
887 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
888 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 889 break;
1da177e4 890 case FSF_LUN_BOXED:
c41f8cbd
SS		 891 zfcp_erp_unit_boxed(unit, 48, req);
892 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
893 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 894 break;
1da177e4 895 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 896 switch (fsq->word[0]) {
1da177e4 897 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 898 zfcp_test_link(unit->port);
1da177e4 899 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 900 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 901 break;
1da177e4
LT		 902 }
903 break;
1da177e4 904 case FSF_GOOD:
c41f8cbd 905 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 906 break;
1da177e4 907 }
1da177e4
LT		 908}
909
910/**
c41f8cbd
SS		 911 * zfcp_fsf_abort_fcp_command - abort running SCSI command
912 * @old_req_id: unsigned long
913 * @adapter: pointer to struct zfcp_adapter
914 * @unit: pointer to struct zfcp_unit
915 * @req_flags: integer specifying the request flags
916 * Returns: pointer to struct zfcp_fsf_req
917 *
918 * FIXME(design): should be watched by a timeout !!!
1da177e4 919 */
1da177e4 920
c41f8cbd
SS		 921struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
922 struct zfcp_adapter *adapter,
923 struct zfcp_unit *unit,
924 int req_flags)
1da177e4 925{
44cc76f2 926 struct qdio_buffer_element *sbale;
c41f8cbd 927 struct zfcp_fsf_req *req = NULL;
8a36e453 928
0406289e 929 spin_lock(&adapter->req_q_lock);
2450d3e7 930 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 931 goto out;
932 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
933 req_flags, adapter->pool.fsf_req_abort);
025270f0 934 if (IS_ERR(req))
c41f8cbd 935 goto out;
2abbe866 936
c41f8cbd
SS		 937 if (unlikely(!(atomic_read(&unit->status) &
938 ZFCP_STATUS_COMMON_UNBLOCKED)))
939 goto out_error_free;
1da177e4 940
c41f8cbd
SS		 941 sbale = zfcp_qdio_sbale_req(req);
942 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
943 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 944
c41f8cbd
SS		 945 req->data = unit;
946 req->handler = zfcp_fsf_abort_fcp_command_handler;
947 req->qtcb->header.lun_handle = unit->handle;
948 req->qtcb->header.port_handle = unit->port->handle;
949 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
950
951 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
952 if (!zfcp_fsf_req_send(req))
953 goto out;
954
955out_error_free:
956 zfcp_fsf_req_free(req);
957 req = NULL;
958out:
0406289e 959 spin_unlock(&adapter->req_q_lock);
c41f8cbd 960 return req;
1da177e4
LT		 961}
962
c41f8cbd 963static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 964{
c41f8cbd
SS		 965 struct zfcp_adapter *adapter = req->adapter;
966 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 967 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 968
c41f8cbd 969 send_ct->status = -EINVAL;
1da177e4 970
c41f8cbd 971 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 972 goto skip_fsfstatus;
973
1da177e4 974 switch (header->fsf_status) {
1da177e4 975 case FSF_GOOD:
c41f8cbd
SS		 976 zfcp_san_dbf_event_ct_response(req);
977 send_ct->status = 0;
1da177e4 978 break;
1da177e4 979 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 980 zfcp_fsf_class_not_supp(req);
1da177e4 981 break;
1da177e4 982 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 983 switch (header->fsf_status_qual.word[0]){
984 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 985 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 986 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 987 break;
1da177e4
LT		 988 }
989 break;
1da177e4 990 case FSF_ACCESS_DENIED:
1da177e4 991 break;
1da177e4 992 case FSF_PORT_BOXED:
c41f8cbd
SS		 993 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
994 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 995 break;
c41f8cbd
SS		 996 case FSF_PORT_HANDLE_NOT_VALID:
997 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
998 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 999 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1000 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1001 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1002 case FSF_SBAL_MISMATCH:
c41f8cbd 1003 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1004 break;
1005 }
1006
1007skip_fsfstatus:
c41f8cbd 1008 if (send_ct->handler)
1da177e4 1009 send_ct->handler(send_ct->handler_data);
c41f8cbd 1010}
1da177e4 1011
c41f8cbd
SS		 1012static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1013 struct scatterlist *sg_req,
1014 struct scatterlist *sg_resp, int max_sbals)
1015{
1016 int bytes;
1017
1018 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1019 sg_req, max_sbals);
1020 if (bytes <= 0)
1021 return -ENOMEM;
1022 req->qtcb->bottom.support.req_buf_length = bytes;
1023 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1024
1025 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1026 sg_resp, max_sbals);
1027 if (bytes <= 0)
1028 return -ENOMEM;
1029 req->qtcb->bottom.support.resp_buf_length = bytes;
1030
1031 return 0;
1da177e4
LT		 1032}
1033
1034/**
c41f8cbd
SS		 1035 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1036 * @ct: pointer to struct zfcp_send_ct with data for request
1037 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1038 * @erp_action: if non-null the Generic Service request sent within ERP
1da177e4 1039 */
c41f8cbd
SS		 1040int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1041 struct zfcp_erp_action *erp_action)
1da177e4 1042{
5ab944f9
SS		 1043 struct zfcp_wka_port *wka_port = ct->wka_port;
1044 struct zfcp_adapter *adapter = wka_port->adapter;
c41f8cbd
SS		 1045 struct zfcp_fsf_req *req;
1046 int ret = -EIO;
1da177e4 1047
0406289e 1048 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1049 if (zfcp_fsf_req_sbal_get(adapter))
1050 goto out;
1da177e4 1051
c41f8cbd
SS		 1052 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1053 ZFCP_REQ_AUTO_CLEANUP, pool);
025270f0 1054 if (IS_ERR(req)) {
c41f8cbd
SS		 1055 ret = PTR_ERR(req);
1056 goto out;
3f0ca62a
CS		 1057 }
1058
c41f8cbd
SS		 1059 ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1060 FSF_MAX_SBALS_PER_REQ);
553448f6 1061 if (ret)
1da177e4 1062 goto failed_send;
1da177e4 1063
c41f8cbd 1064 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1065 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1066 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1067 req->qtcb->bottom.support.timeout = ct->timeout;
1068 req->data = ct;
1069
1070 zfcp_san_dbf_event_ct_request(req);
1071
1072 if (erp_action) {
1073 erp_action->fsf_req = req;
1074 req->erp_action = erp_action;
287ac01a 1075 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 1076 } else
1077 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1078
c41f8cbd
SS		 1079 ret = zfcp_fsf_req_send(req);
1080 if (ret)
1081 goto failed_send;
1da177e4 1082
c41f8cbd 1083 goto out;
1da177e4 1084
c41f8cbd
SS		 1085failed_send:
1086 zfcp_fsf_req_free(req);
1087 if (erp_action)
1088 erp_action->fsf_req = NULL;
1089out:
0406289e 1090 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1091 return ret;
1da177e4
LT		 1092}
1093
c41f8cbd 1094static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1095{
c41f8cbd
SS		 1096 struct zfcp_send_els *send_els = req->data;
1097 struct zfcp_port *port = send_els->port;
1098 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1099
c41f8cbd 1100 send_els->status = -EINVAL;
1da177e4 1101
c41f8cbd 1102 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1103 goto skip_fsfstatus;
1104
1105 switch (header->fsf_status) {
1da177e4 1106 case FSF_GOOD:
c41f8cbd
SS		 1107 zfcp_san_dbf_event_els_response(req);
1108 send_els->status = 0;
1da177e4 1109 break;
1da177e4 1110 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1111 zfcp_fsf_class_not_supp(req);
1da177e4 1112 break;
1da177e4 1113 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1114 switch (header->fsf_status_qual.word[0]){
1115 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1116 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1117 zfcp_test_link(port);
c41f8cbd 1118 /*fall through */
1da177e4 1119 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1120 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1121 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1122 break;
1da177e4
LT		 1123 }
1124 break;
1da177e4 1125 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1126 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1127 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1128 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1129 break;
1da177e4 1130 case FSF_ACCESS_DENIED:
c41f8cbd 1131 zfcp_fsf_access_denied_port(req, port);
1da177e4 1132 break;
c41f8cbd
SS		 1133 case FSF_SBAL_MISMATCH:
1134 /* should never occure, avoided in zfcp_fsf_send_els */
1135 /* fall through */
1da177e4 1136 default:
c41f8cbd 1137 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1138 break;
1139 }
1da177e4 1140skip_fsfstatus:
aa551daf 1141 if (send_els->handler)
1da177e4 1142 send_els->handler(send_els->handler_data);
c41f8cbd 1143}
1da177e4 1144
c41f8cbd
SS		 1145/**
1146 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1147 * @els: pointer to struct zfcp_send_els with data for the command
1148 */
1149int zfcp_fsf_send_els(struct zfcp_send_els *els)
1150{
1151 struct zfcp_fsf_req *req;
1152 struct zfcp_adapter *adapter = els->adapter;
1153 struct fsf_qtcb_bottom_support *bottom;
1154 int ret = -EIO;
1155
1156 if (unlikely(!(atomic_read(&els->port->status) &
1157 ZFCP_STATUS_COMMON_UNBLOCKED)))
1158 return -EBUSY;
1159
0406289e 1160 spin_lock(&adapter->req_q_lock);
2450d3e7 1161 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1162 goto out;
1163 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1164 ZFCP_REQ_AUTO_CLEANUP, NULL);
025270f0 1165 if (IS_ERR(req)) {
c41f8cbd
SS		 1166 ret = PTR_ERR(req);
1167 goto out;
1168 }
1169
44cc76f2
SS		 1170 ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1171
c41f8cbd
SS		 1172 if (ret)
1173 goto failed_send;
1174
1175 bottom = &req->qtcb->bottom.support;
1176 req->handler = zfcp_fsf_send_els_handler;
1177 bottom->d_id = els->d_id;
1178 bottom->service_class = FSF_CLASS_3;
1179 bottom->timeout = 2 * R_A_TOV;
1180 req->data = els;
1181
1182 zfcp_san_dbf_event_els_request(req);
1183
1184 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1185 ret = zfcp_fsf_req_send(req);
1186 if (ret)
1187 goto failed_send;
1188
1189 goto out;
1190
1191failed_send:
1192 zfcp_fsf_req_free(req);
1193out:
0406289e 1194 spin_unlock(&adapter->req_q_lock);
c41f8cbd 1195 return ret;
1da177e4
LT		 1196}
1197
c41f8cbd 1198int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1199{
44cc76f2 1200 struct qdio_buffer_element *sbale;
c41f8cbd 1201 struct zfcp_fsf_req *req;
52ef11a7 1202 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd
SS		 1203 int retval = -EIO;
1204
0406289e 1205 spin_lock_bh(&adapter->req_q_lock);
2450d3e7 1206 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1207 goto out;
1208 req = zfcp_fsf_req_create(adapter,
1209 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1210 ZFCP_REQ_AUTO_CLEANUP,
1211 adapter->pool.fsf_req_erp);
025270f0 1212 if (IS_ERR(req)) {
c41f8cbd
SS		 1213 retval = PTR_ERR(req);
1214 goto out;
1da177e4
LT		 1215 }
1216
c41f8cbd 1217 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1218 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1219 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1220
c41f8cbd 1221 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1222 FSF_FEATURE_CFDC |
1223 FSF_FEATURE_LUN_SHARING |
9eb69aff 1224 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1225 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1226 req->erp_action = erp_action;
1227 req->handler = zfcp_fsf_exchange_config_data_handler;
1228 erp_action->fsf_req = req;
1da177e4 1229
287ac01a 1230 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1231 retval = zfcp_fsf_req_send(req);
1da177e4 1232 if (retval) {
c41f8cbd 1233 zfcp_fsf_req_free(req);
1da177e4 1234 erp_action->fsf_req = NULL;
1da177e4 1235 }
c41f8cbd 1236out:
0406289e 1237 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1238 return retval;
1239}
1da177e4 1240
c41f8cbd
SS		 1241int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1242 struct fsf_qtcb_bottom_config *data)
52ef11a7 1243{
44cc76f2 1244 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1245 struct zfcp_fsf_req *req = NULL;
1246 int retval = -EIO;
1247
0406289e 1248 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1249 if (zfcp_fsf_req_sbal_get(adapter))
1250 goto out;
1251
1252 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1253 0, NULL);
025270f0 1254 if (IS_ERR(req)) {
c41f8cbd
SS		 1255 retval = PTR_ERR(req);
1256 goto out;
52ef11a7
SS		 1257 }
1258
c41f8cbd 1259 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1260 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1261 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1262 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1263
c41f8cbd 1264 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1265 FSF_FEATURE_CFDC |
1266 FSF_FEATURE_LUN_SHARING |
1267 FSF_FEATURE_NOTIFICATION_LOST |
1268 FSF_FEATURE_UPDATE_ALERT;
1269
1270 if (data)
c41f8cbd 1271 req->data = data;
52ef11a7 1272
c41f8cbd
SS		 1273 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1274 retval = zfcp_fsf_req_send(req);
1275out:
0406289e 1276 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1277 if (!retval)
c41f8cbd
SS		 1278 wait_event(req->completion_wq,
1279 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7 1280
c41f8cbd 1281 zfcp_fsf_req_free(req);
52ef11a7 1282
1da177e4
LT		 1283 return retval;
1284}
1285
1da177e4
LT		 1286/**
1287 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1288 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1289 * Returns: 0 on success, error otherwise
1da177e4 1290 */
c41f8cbd 1291int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1292{
44cc76f2 1293 struct qdio_buffer_element *sbale;
c41f8cbd 1294 struct zfcp_fsf_req *req;
52ef11a7 1295 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd 1296 int retval = -EIO;
1da177e4 1297
553448f6 1298 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1299 return -EOPNOTSUPP;
1da177e4 1300
0406289e 1301 spin_lock_bh(&adapter->req_q_lock);
2450d3e7 1302 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1303 goto out;
1304 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1305 ZFCP_REQ_AUTO_CLEANUP,
1306 adapter->pool.fsf_req_erp);
025270f0 1307 if (IS_ERR(req)) {
c41f8cbd
SS		 1308 retval = PTR_ERR(req);
1309 goto out;
aef4a983
MS		 1310 }
1311
c41f8cbd 1312 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1313 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1314 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1315
c41f8cbd
SS		 1316 req->handler = zfcp_fsf_exchange_port_data_handler;
1317 req->erp_action = erp_action;
1318 erp_action->fsf_req = req;
52ef11a7 1319
287ac01a 1320 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1321 retval = zfcp_fsf_req_send(req);
1da177e4 1322 if (retval) {
c41f8cbd 1323 zfcp_fsf_req_free(req);
52ef11a7
SS		 1324 erp_action->fsf_req = NULL;
1325 }
c41f8cbd 1326out:
0406289e 1327 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1328 return retval;
1329}
1330
52ef11a7
SS		 1331/**
1332 * zfcp_fsf_exchange_port_data_sync - request information about local port
c41f8cbd
SS		 1333 * @adapter: pointer to struct zfcp_adapter
1334 * @data: pointer to struct fsf_qtcb_bottom_port
1335 * Returns: 0 on success, error otherwise
52ef11a7 1336 */
c41f8cbd
SS		 1337int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1338 struct fsf_qtcb_bottom_port *data)
52ef11a7 1339{
44cc76f2 1340 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1341 struct zfcp_fsf_req *req = NULL;
1342 int retval = -EIO;
52ef11a7 1343
553448f6 1344 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1345 return -EOPNOTSUPP;
52ef11a7 1346
0406289e 1347 spin_lock_bh(&adapter->req_q_lock);
2450d3e7 1348 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1349 goto out;
1350
1351 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1352 NULL);
025270f0 1353 if (IS_ERR(req)) {
c41f8cbd
SS		 1354 retval = PTR_ERR(req);
1355 goto out;
1da177e4
LT		 1356 }
1357
52ef11a7 1358 if (data)
c41f8cbd 1359 req->data = data;
52ef11a7 1360
c41f8cbd 1361 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1362 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1363 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1364
c41f8cbd
SS		 1365 req->handler = zfcp_fsf_exchange_port_data_handler;
1366 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1367 retval = zfcp_fsf_req_send(req);
1368out:
0406289e 1369 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1370 if (!retval)
c41f8cbd
SS		 1371 wait_event(req->completion_wq,
1372 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1373 zfcp_fsf_req_free(req);
1da177e4 1374
1da177e4
LT		 1375 return retval;
1376}
1377
c41f8cbd 1378static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1379{
c41f8cbd
SS		 1380 struct zfcp_port *port = req->data;
1381 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1382 struct fsf_plogi *plogi;
1da177e4 1383
c41f8cbd 1384 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1385 return;
1da177e4 1386
1da177e4 1387 switch (header->fsf_status) {
1da177e4 1388 case FSF_PORT_ALREADY_OPEN:
1da177e4 1389 break;
1da177e4 1390 case FSF_ACCESS_DENIED:
c41f8cbd 1391 zfcp_fsf_access_denied_port(req, port);
1da177e4 1392 break;
1da177e4 1393 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1394 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1395 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1396 "remote port 0x%016Lx\n",
1397 (unsigned long long)port->wwpn);
c41f8cbd
SS		 1398 zfcp_erp_port_failed(port, 31, req);
1399 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1400 break;
1da177e4 1401 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1402 switch (header->fsf_status_qual.word[0]) {
1403 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1404 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1405 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1406 break;
1407 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1408 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1409 "Remote port 0x%016Lx could not be opened\n",
7ba58c9c 1410 (unsigned long long)port->wwpn);
c41f8cbd
SS		 1411 zfcp_erp_port_failed(port, 32, req);
1412 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1413 break;
1414 }
1415 break;
1da177e4 1416 case FSF_GOOD:
1da177e4 1417 port->handle = header->port_handle;
1da177e4
LT		 1418 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1419 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1420 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1421 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1422 &port->status);
1da177e4
LT		 1423 /* check whether D_ID has changed during open */
1424 /*
1425 * FIXME: This check is not airtight, as the FCP channel does
1426 * not monitor closures of target port connections caused on
1427 * the remote side. Thus, they might miss out on invalidating
1428 * locally cached WWPNs (and other N_Port parameters) of gone
1429 * target ports. So, our heroic attempt to make things safe
1430 * could be undermined by 'open port' response data tagged with
1431 * obsolete WWPNs. Another reason to monitor potential
1432 * connection closures ourself at least (by interpreting
1433 * incoming ELS' and unsolicited status). It just crosses my
1434 * mind that one should be able to cross-check by means of
1435 * another GID_PN straight after a port has been opened.
1436 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1437 */
c41f8cbd
SS		 1438 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1439 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1440 if (plogi->serv_param.wwpn != port->wwpn)
1441 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1442 &port->status);
1443 else {
1444 port->wwnn = plogi->serv_param.wwnn;
1445 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1446 }
1447 }
1448 break;
1da177e4 1449 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1450 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1451 break;
1452 }
1da177e4
LT		 1453}
1454
c41f8cbd
SS		 1455/**
1456 * zfcp_fsf_open_port - create and send open port request
1457 * @erp_action: pointer to struct zfcp_erp_action
1458 * Returns: 0 on success, error otherwise
1da177e4 1459 */
c41f8cbd 1460int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1461{
44cc76f2 1462 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1463 struct zfcp_adapter *adapter = erp_action->adapter;
1464 struct zfcp_fsf_req *req;
1465 int retval = -EIO;
1466
0406289e 1467 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1468 if (zfcp_fsf_req_sbal_get(adapter))
1469 goto out;
1470
1471 req = zfcp_fsf_req_create(adapter,
1472 FSF_QTCB_OPEN_PORT_WITH_DID,
1473 ZFCP_REQ_AUTO_CLEANUP,
1474 adapter->pool.fsf_req_erp);
025270f0 1475 if (IS_ERR(req)) {
c41f8cbd 1476 retval = PTR_ERR(req);
1da177e4 1477 goto out;
c41f8cbd 1478 }
1da177e4 1479
c41f8cbd 1480 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1481 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1482 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1483
c41f8cbd
SS		 1484 req->handler = zfcp_fsf_open_port_handler;
1485 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1486 req->data = erp_action->port;
1487 req->erp_action = erp_action;
1488 erp_action->fsf_req = req;
c41f8cbd 1489
287ac01a 1490 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1491 retval = zfcp_fsf_req_send(req);
1da177e4 1492 if (retval) {
c41f8cbd 1493 zfcp_fsf_req_free(req);
1da177e4 1494 erp_action->fsf_req = NULL;
1da177e4 1495 }
c41f8cbd 1496out:
0406289e 1497 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1498 return retval;
1499}
1500
c41f8cbd 1501static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1502{
c41f8cbd 1503 struct zfcp_port *port = req->data;
1da177e4 1504
c41f8cbd 1505 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1506 return;
1da177e4 1507
c41f8cbd 1508 switch (req->qtcb->header.fsf_status) {
1da177e4 1509 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1510 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1511 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1512 break;
1da177e4 1513 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1514 break;
1da177e4 1515 case FSF_GOOD:
c41f8cbd 1516 zfcp_erp_modify_port_status(port, 33, req,
1da177e4
LT		 1517 ZFCP_STATUS_COMMON_OPEN,
1518 ZFCP_CLEAR);
1da177e4 1519 break;
1da177e4 1520 }
1da177e4
LT		 1521}
1522
c41f8cbd
SS		 1523/**
1524 * zfcp_fsf_close_port - create and send close port request
1525 * @erp_action: pointer to struct zfcp_erp_action
1526 * Returns: 0 on success, error otherwise
1da177e4 1527 */
c41f8cbd 1528int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1529{
44cc76f2 1530 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1531 struct zfcp_adapter *adapter = erp_action->adapter;
1532 struct zfcp_fsf_req *req;
1533 int retval = -EIO;
1534
0406289e 1535 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1536 if (zfcp_fsf_req_sbal_get(adapter))
1537 goto out;
1538
1539 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1540 ZFCP_REQ_AUTO_CLEANUP,
1541 adapter->pool.fsf_req_erp);
025270f0 1542 if (IS_ERR(req)) {
c41f8cbd 1543 retval = PTR_ERR(req);
1da177e4 1544 goto out;
c41f8cbd 1545 }
1da177e4 1546
c41f8cbd 1547 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1548 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1549 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1550
c41f8cbd
SS		 1551 req->handler = zfcp_fsf_close_port_handler;
1552 req->data = erp_action->port;
1553 req->erp_action = erp_action;
1554 req->qtcb->header.port_handle = erp_action->port->handle;
1555 erp_action->fsf_req = req;
c41f8cbd 1556
287ac01a 1557 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1558 retval = zfcp_fsf_req_send(req);
1da177e4 1559 if (retval) {
c41f8cbd 1560 zfcp_fsf_req_free(req);
1da177e4 1561 erp_action->fsf_req = NULL;
1da177e4 1562 }
c41f8cbd 1563out:
0406289e 1564 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1565 return retval;
1566}
1567
5ab944f9
SS		 1568static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1569{
1570 struct zfcp_wka_port *wka_port = req->data;
1571 struct fsf_qtcb_header *header = &req->qtcb->header;
1572
1573 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1574 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1575 goto out;
1576 }
1577
1578 switch (header->fsf_status) {
1579 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1580 dev_warn(&req->adapter->ccw_device->dev,
1581 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1582 case FSF_ADAPTER_STATUS_AVAILABLE:
1583 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1584 case FSF_ACCESS_DENIED:
1585 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1586 break;
1587 case FSF_PORT_ALREADY_OPEN:
1588 case FSF_GOOD:
1589 wka_port->handle = header->port_handle;
1590 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1591 }
1592out:
1593 wake_up(&wka_port->completion_wq);
1594}
1595
1596/**
1597 * zfcp_fsf_open_wka_port - create and send open wka-port request
1598 * @wka_port: pointer to struct zfcp_wka_port
1599 * Returns: 0 on success, error otherwise
1600 */
1601int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1602{
1603 struct qdio_buffer_element *sbale;
1604 struct zfcp_adapter *adapter = wka_port->adapter;
1605 struct zfcp_fsf_req *req;
1606 int retval = -EIO;
1607
0406289e 1608 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1609 if (zfcp_fsf_req_sbal_get(adapter))
1610 goto out;
1611
1612 req = zfcp_fsf_req_create(adapter,
1613 FSF_QTCB_OPEN_PORT_WITH_DID,
1614 ZFCP_REQ_AUTO_CLEANUP,
1615 adapter->pool.fsf_req_erp);
1616 if (unlikely(IS_ERR(req))) {
1617 retval = PTR_ERR(req);
1618 goto out;
1619 }
1620
1621 sbale = zfcp_qdio_sbale_req(req);
1622 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1623 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1624
1625 req->handler = zfcp_fsf_open_wka_port_handler;
1626 req->qtcb->bottom.support.d_id = wka_port->d_id;
1627 req->data = wka_port;
1628
1629 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1630 retval = zfcp_fsf_req_send(req);
1631 if (retval)
1632 zfcp_fsf_req_free(req);
1633out:
0406289e 1634 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1635 return retval;
1636}
1637
1638static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1639{
1640 struct zfcp_wka_port *wka_port = req->data;
1641
1642 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1643 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1644 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 107, req);
1645 }
1646
1647 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1648 wake_up(&wka_port->completion_wq);
1649}
1650
1651/**
1652 * zfcp_fsf_close_wka_port - create and send close wka port request
1653 * @erp_action: pointer to struct zfcp_erp_action
1654 * Returns: 0 on success, error otherwise
1655 */
1656int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1657{
1658 struct qdio_buffer_element *sbale;
1659 struct zfcp_adapter *adapter = wka_port->adapter;
1660 struct zfcp_fsf_req *req;
1661 int retval = -EIO;
1662
0406289e 1663 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1664 if (zfcp_fsf_req_sbal_get(adapter))
1665 goto out;
1666
1667 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1668 ZFCP_REQ_AUTO_CLEANUP,
1669 adapter->pool.fsf_req_erp);
1670 if (unlikely(IS_ERR(req))) {
1671 retval = PTR_ERR(req);
1672 goto out;
1673 }
1674
1675 sbale = zfcp_qdio_sbale_req(req);
1676 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1677 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1678
1679 req->handler = zfcp_fsf_close_wka_port_handler;
1680 req->data = wka_port;
1681 req->qtcb->header.port_handle = wka_port->handle;
1682
1683 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1684 retval = zfcp_fsf_req_send(req);
1685 if (retval)
1686 zfcp_fsf_req_free(req);
1687out:
0406289e 1688 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1689 return retval;
1690}
1691
c41f8cbd 1692static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1693{
c41f8cbd
SS		 1694 struct zfcp_port *port = req->data;
1695 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1696 struct zfcp_unit *unit;
1da177e4 1697
c41f8cbd 1698 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4 1699 goto skip_fsfstatus;
1da177e4 1700
1da177e4 1701 switch (header->fsf_status) {
1da177e4 1702 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1703 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1704 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1705 break;
1da177e4 1706 case FSF_ACCESS_DENIED:
c41f8cbd 1707 zfcp_fsf_access_denied_port(req, port);
1da177e4 1708 break;
1da177e4 1709 case FSF_PORT_BOXED:
c41f8cbd
SS		 1710 zfcp_erp_port_boxed(port, 50, req);
1711 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1712 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 1713 /* can't use generic zfcp_erp_modify_port_status because
1714 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1715 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1716 list_for_each_entry(unit, &port->unit_list_head, list)
1717 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1718 &unit->status);
1da177e4 1719 break;
1da177e4 1720 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1721 switch (header->fsf_status_qual.word[0]) {
1722 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1723 /* fall through */
1da177e4 1724 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1725 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1726 break;
1da177e4
LT		 1727 }
1728 break;
1da177e4 1729 case FSF_GOOD:
1da177e4
LT		 1730 /* can't use generic zfcp_erp_modify_port_status because
1731 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1732 */
1733 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1734 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1735 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1736 &unit->status);
1da177e4 1737 break;
1da177e4 1738 }
c41f8cbd 1739skip_fsfstatus:
1da177e4 1740 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1da177e4
LT		 1741}
1742
c41f8cbd
SS		 1743/**
1744 * zfcp_fsf_close_physical_port - close physical port
1745 * @erp_action: pointer to struct zfcp_erp_action
1746 * Returns: 0 on success
1da177e4 1747 */
c41f8cbd 1748int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1749{
44cc76f2 1750 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1751 struct zfcp_adapter *adapter = erp_action->adapter;
1752 struct zfcp_fsf_req *req;
1753 int retval = -EIO;
1754
0406289e 1755 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1756 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1757 goto out;
1da177e4 1758
c41f8cbd
SS		 1759 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1760 ZFCP_REQ_AUTO_CLEANUP,
1761 adapter->pool.fsf_req_erp);
025270f0 1762 if (IS_ERR(req)) {
c41f8cbd
SS		 1763 retval = PTR_ERR(req);
1764 goto out;
1765 }
1da177e4 1766
c41f8cbd
SS		 1767 sbale = zfcp_qdio_sbale_req(req);
1768 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1769 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1770
c41f8cbd
SS		 1771 req->data = erp_action->port;
1772 req->qtcb->header.port_handle = erp_action->port->handle;
1773 req->erp_action = erp_action;
1774 req->handler = zfcp_fsf_close_physical_port_handler;
1775 erp_action->fsf_req = req;
1776 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1777 &erp_action->port->status);
1778
287ac01a 1779 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1780 retval = zfcp_fsf_req_send(req);
1da177e4 1781 if (retval) {
c41f8cbd 1782 zfcp_fsf_req_free(req);
1da177e4 1783 erp_action->fsf_req = NULL;
1da177e4 1784 }
c41f8cbd 1785out:
0406289e 1786 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1787 return retval;
1788}
1789
c41f8cbd 1790static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1791{
c41f8cbd
SS		 1792 struct zfcp_adapter *adapter = req->adapter;
1793 struct zfcp_unit *unit = req->data;
1794 struct fsf_qtcb_header *header = &req->qtcb->header;
1795 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1796 struct fsf_queue_designator *queue_designator =
1797 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1798 int exclusive, readwrite;
1da177e4 1799
c41f8cbd 1800 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1801 return;
1da177e4 1802
1da177e4 1803 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1804 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1805 ZFCP_STATUS_UNIT_SHARED |
1806 ZFCP_STATUS_UNIT_READONLY,
1807 &unit->status);
1808
1da177e4
LT		 1809 switch (header->fsf_status) {
1810
1811 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1812 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1813 /* fall through */
1da177e4 1814 case FSF_LUN_ALREADY_OPEN:
1da177e4 1815 break;
1da177e4 1816 case FSF_ACCESS_DENIED:
c41f8cbd 1817 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1818 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1819 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1820 break;
1da177e4 1821 case FSF_PORT_BOXED:
c41f8cbd
SS		 1822 zfcp_erp_port_boxed(unit->port, 51, req);
1823 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1824 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1825 break;
1da177e4 1826 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1827 if (header->fsf_status_qual.word[0])
553448f6 1828 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1829 "LUN 0x%Lx on port 0x%Lx is already in "
1830 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1831 (unsigned long long)unit->fcp_lun,
1832 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1833 queue_designator->cssid,
1834 queue_designator->hla);
c41f8cbd 1835 else
553448f6
CS		 1836 zfcp_act_eval_err(adapter,
1837 header->fsf_status_qual.word[2]);
c41f8cbd 1838 zfcp_erp_unit_access_denied(unit, 60, req);
1da177e4
LT		 1839 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1840 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1841 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1842 break;
1da177e4 1843 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1844 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1845 "No handle is available for LUN "
1846 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1847 (unsigned long long)unit->fcp_lun,
1848 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1849 zfcp_erp_unit_failed(unit, 34, req);
1850 /* fall through */
1851 case FSF_INVALID_COMMAND_OPTION:
1852 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1853 break;
1da177e4 1854 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1855 switch (header->fsf_status_qual.word[0]) {
1856 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1857 zfcp_test_link(unit->port);
c41f8cbd 1858 /* fall through */
1da177e4 1859 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1860 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1861 break;
1da177e4
LT		 1862 }
1863 break;
1864
1da177e4 1865 case FSF_GOOD:
1da177e4 1866 unit->handle = header->lun_handle;
1da177e4 1867 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1868
1869 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1870 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1871 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1872 exclusive = (bottom->lun_access_info &
1873 FSF_UNIT_ACCESS_EXCLUSIVE);
1874 readwrite = (bottom->lun_access_info &
1875 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1876
1da177e4
LT		 1877 if (!exclusive)
1878 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1879 &unit->status);
1880
1881 if (!readwrite) {
1882 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1883 &unit->status);
c41f8cbd 1884 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1885 "SCSI device at LUN 0x%016Lx on port "
1886 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1887 (unsigned long long)unit->fcp_lun,
1888 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1889 }
1890
1891 if (exclusive && !readwrite) {
c41f8cbd 1892 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1893 "Exclusive read-only access not "
1894 "supported (unit 0x%016Lx, "
1895 "port 0x%016Lx)\n",
7ba58c9c
SS		 1896 (unsigned long long)unit->fcp_lun,
1897 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1898 zfcp_erp_unit_failed(unit, 35, req);
1899 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1900 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1da177e4 1901 } else if (!exclusive && readwrite) {
c41f8cbd 1902 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1903 "Shared read-write access not "
1904 "supported (unit 0x%016Lx, port "
1905 "0x%016Lx\n)",
7ba58c9c
SS		 1906 (unsigned long long)unit->fcp_lun,
1907 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1908 zfcp_erp_unit_failed(unit, 36, req);
1909 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1910 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1da177e4
LT		 1911 }
1912 }
1da177e4 1913 break;
1da177e4 1914 }
1da177e4
LT		 1915}
1916
c41f8cbd
SS		 1917/**
1918 * zfcp_fsf_open_unit - open unit
1919 * @erp_action: pointer to struct zfcp_erp_action
1920 * Returns: 0 on success, error otherwise
1da177e4 1921 */
c41f8cbd 1922int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1923{
44cc76f2 1924 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1925 struct zfcp_adapter *adapter = erp_action->adapter;
1926 struct zfcp_fsf_req *req;
1927 int retval = -EIO;
1928
0406289e 1929 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1930 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1931 goto out;
1da177e4 1932
c41f8cbd
SS		 1933 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1934 ZFCP_REQ_AUTO_CLEANUP,
1935 adapter->pool.fsf_req_erp);
025270f0 1936 if (IS_ERR(req)) {
c41f8cbd
SS		 1937 retval = PTR_ERR(req);
1938 goto out;
1939 }
1940
1941 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1942 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1943 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1944
c41f8cbd
SS		 1945 req->qtcb->header.port_handle = erp_action->port->handle;
1946 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1947 req->handler = zfcp_fsf_open_unit_handler;
1948 req->data = erp_action->unit;
1949 req->erp_action = erp_action;
1950 erp_action->fsf_req = req;
1951
1952 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1953 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1954
287ac01a 1955 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1956 retval = zfcp_fsf_req_send(req);
1da177e4 1957 if (retval) {
c41f8cbd 1958 zfcp_fsf_req_free(req);
1da177e4 1959 erp_action->fsf_req = NULL;
1da177e4 1960 }
c41f8cbd 1961out:
0406289e 1962 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1963 return retval;
1964}
1965
c41f8cbd 1966static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1967{
c41f8cbd 1968 struct zfcp_unit *unit = req->data;
1da177e4 1969
c41f8cbd 1970 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1971 return;
1da177e4 1972
c41f8cbd 1973 switch (req->qtcb->header.fsf_status) {
1da177e4 1974 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1975 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1976 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1977 break;
1da177e4 1978 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd
SS		 1979 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1980 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1981 break;
1da177e4 1982 case FSF_PORT_BOXED:
c41f8cbd
SS		 1983 zfcp_erp_port_boxed(unit->port, 52, req);
1984 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1985 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1986 break;
1da177e4 1987 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 1988 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 1989 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1990 zfcp_test_link(unit->port);
c41f8cbd 1991 /* fall through */
1da177e4 1992 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1993 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1994 break;
1995 }
1996 break;
1da177e4 1997 case FSF_GOOD:
1da177e4 1998 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 1999 break;
1da177e4 2000 }
1da177e4
LT		 2001}
2002
2003/**
c41f8cbd
SS		 2004 * zfcp_fsf_close_unit - close zfcp unit
2005 * @erp_action: pointer to struct zfcp_unit
2006 * Returns: 0 on success, error otherwise
1da177e4 2007 */
c41f8cbd 2008int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2009{
44cc76f2 2010 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2011 struct zfcp_adapter *adapter = erp_action->adapter;
2012 struct zfcp_fsf_req *req;
2013 int retval = -EIO;
1da177e4 2014
0406289e 2015 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 2016 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 2017 goto out;
c41f8cbd
SS		 2018 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2019 ZFCP_REQ_AUTO_CLEANUP,
2020 adapter->pool.fsf_req_erp);
025270f0 2021 if (IS_ERR(req)) {
c41f8cbd
SS		 2022 retval = PTR_ERR(req);
2023 goto out;
2024 }
1da177e4 2025
c41f8cbd
SS		 2026 sbale = zfcp_qdio_sbale_req(req);
2027 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2028 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2029
c41f8cbd
SS		 2030 req->qtcb->header.port_handle = erp_action->port->handle;
2031 req->qtcb->header.lun_handle = erp_action->unit->handle;
2032 req->handler = zfcp_fsf_close_unit_handler;
2033 req->data = erp_action->unit;
2034 req->erp_action = erp_action;
2035 erp_action->fsf_req = req;
fdf23452 2036
287ac01a 2037 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2038 retval = zfcp_fsf_req_send(req);
2039 if (retval) {
2040 zfcp_fsf_req_free(req);
2041 erp_action->fsf_req = NULL;
2042 }
2043out:
0406289e 2044 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 2045 return retval;
1da177e4
LT		 2046}
2047
c9615858
CS		 2048static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2049{
2050 lat_rec->sum += lat;
c41f8cbd
SS		 2051 lat_rec->min = min(lat_rec->min, lat);
2052 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2053}
2054
c41f8cbd 2055static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2056{
2057 struct fsf_qual_latency_info *lat_inf;
2058 struct latency_cont *lat;
c41f8cbd 2059 struct zfcp_unit *unit = req->unit;
c9615858
CS		 2060 unsigned long flags;
2061
c41f8cbd 2062 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2063
c41f8cbd 2064 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2065 case FSF_DATADIR_READ:
2066 lat = &unit->latencies.read;
2067 break;
2068 case FSF_DATADIR_WRITE:
2069 lat = &unit->latencies.write;
2070 break;
2071 case FSF_DATADIR_CMND:
2072 lat = &unit->latencies.cmd;
2073 break;
2074 default:
2075 return;
2076 }
2077
2078 spin_lock_irqsave(&unit->latencies.lock, flags);
2079 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2080 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2081 lat->counter++;
c41f8cbd 2082 spin_unlock_irqrestore(&unit->latencies.lock, flags);
1da177e4
LT		 2083}
2084
c41f8cbd 2085static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2086{
c41f8cbd 2087 struct scsi_cmnd *scpnt = req->data;
1da177e4 2088 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2089 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2090 u32 sns_len;
f76af7d7 2091 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2092 unsigned long flags;
1da177e4 2093
553448f6 2094 if (unlikely(!scpnt))
c41f8cbd 2095 return;
553448f6 2096
c41f8cbd
SS		 2097 read_lock_irqsave(&req->adapter->abort_lock, flags);
2098
2099 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07
MP		 2100 set_host_byte(scpnt, DID_SOFT_ERROR);
2101 set_driver_byte(scpnt, SUGGEST_RETRY);
1da177e4
LT		 2102 goto skip_fsfstatus;
2103 }
2104
c41f8cbd 2105 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2106 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2107 goto skip_fsfstatus;
2108 }
2109
feac6a07 2110 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2111
1da177e4 2112 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2113
c41f8cbd
SS		 2114 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2115 zfcp_fsf_req_latency(req);
c9615858 2116
1da177e4 2117 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2118 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2119 set_host_byte(scpnt, DID_OK);
c41f8cbd 2120 else {
feac6a07 2121 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2122 goto skip_fsfstatus;
1da177e4
LT		 2123 }
2124 }
2125
1da177e4 2126 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2127 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2128 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2129 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2130 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2131
9d058ecf 2132 memcpy(scpnt->sense_buffer,
1da177e4 2133 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2134 }
2135
1da177e4 2136 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2137 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2138 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2139 scpnt->underflow)
feac6a07 2140 set_host_byte(scpnt, DID_ERROR);
1da177e4 2141 }
c41f8cbd 2142skip_fsfstatus:
8a36e453 2143 if (scpnt->result != 0)
c41f8cbd 2144 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
8a36e453 2145 else if (scpnt->retries > 0)
c41f8cbd 2146 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
8a36e453 2147 else
c41f8cbd 2148 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
1da177e4 2149
1da177e4 2150 scpnt->host_scribble = NULL;
1da177e4 2151 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2152 /*
2153 * We must hold this lock until scsi_done has been called.
2154 * Otherwise we may call scsi_done after abort regarding this
2155 * command has completed.
2156 * Note: scsi_done must not block!
2157 */
c41f8cbd 2158 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2159}
2160
c41f8cbd 2161static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2162{
1da177e4 2163 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2164 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2165 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2166
c41f8cbd
SS		 2167 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2168 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2169 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2170}
2171
2172
2173static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2174{
2175 struct zfcp_unit *unit;
2176 struct fsf_qtcb_header *header = &req->qtcb->header;
2177
2178 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2179 unit = req->data;
2180 else
2181 unit = req->unit;
2182
2183 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2184 goto skip_fsfstatus;
1da177e4 2185
c41f8cbd
SS		 2186 switch (header->fsf_status) {
2187 case FSF_HANDLE_MISMATCH:
2188 case FSF_PORT_HANDLE_NOT_VALID:
2189 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2190 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2191 break;
2192 case FSF_FCPLUN_NOT_VALID:
2193 case FSF_LUN_HANDLE_NOT_VALID:
2194 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2195 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2196 break;
c41f8cbd
SS		 2197 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2198 zfcp_fsf_class_not_supp(req);
1da177e4 2199 break;
c41f8cbd
SS		 2200 case FSF_ACCESS_DENIED:
2201 zfcp_fsf_access_denied_unit(req, unit);
2202 break;
2203 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2204 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2205 "Incorrect direction %d, unit 0x%016Lx on port "
2206 "0x%016Lx closed\n",
c41f8cbd 2207 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2208 (unsigned long long)unit->fcp_lun,
2209 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2210 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2211 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2212 break;
2213 case FSF_CMND_LENGTH_NOT_VALID:
2214 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2215 "Incorrect CDB length %d, unit 0x%016Lx on "
2216 "port 0x%016Lx closed\n",
c41f8cbd 2217 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2218 (unsigned long long)unit->fcp_lun,
2219 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2220 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2221 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2222 break;
2223 case FSF_PORT_BOXED:
2224 zfcp_erp_port_boxed(unit->port, 53, req);
2225 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2226 ZFCP_STATUS_FSFREQ_RETRY;
2227 break;
2228 case FSF_LUN_BOXED:
2229 zfcp_erp_unit_boxed(unit, 54, req);
2230 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2231 ZFCP_STATUS_FSFREQ_RETRY;
2232 break;
2233 case FSF_ADAPTER_STATUS_AVAILABLE:
2234 if (header->fsf_status_qual.word[0] ==
2235 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2236 zfcp_test_link(unit->port);
2237 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2238 break;
1da177e4 2239 }
c41f8cbd
SS		 2240skip_fsfstatus:
2241 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2242 zfcp_fsf_send_fcp_ctm_handler(req);
2243 else {
2244 zfcp_fsf_send_fcp_command_task_handler(req);
2245 req->unit = NULL;
2246 zfcp_unit_put(unit);
2247 }
1da177e4
LT		 2248}
2249
7ba58c9c
SS		 2250static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2251{
2252 u32 *fcp_dl_ptr;
2253
2254 /*
2255 * fcp_dl_addr = start address of fcp_cmnd structure +
2256 * size of fixed part + size of dynamically sized add_dcp_cdb field
2257 * SEE FCP-2 documentation
2258 */
2259 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2260 (fcp_cmd->add_fcp_cdb_length << 2));
2261 *fcp_dl_ptr = fcp_dl;
2262}
2263
c41f8cbd
SS		 2264/**
2265 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2266 * @adapter: adapter where scsi command is issued
2267 * @unit: unit where command is sent to
2268 * @scsi_cmnd: scsi command to be sent
2269 * @timer: timer to be started when request is initiated
2270 * @req_flags: flags for fsf_request
1da177e4 2271 */
c41f8cbd
SS		 2272int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2273 struct zfcp_unit *unit,
2274 struct scsi_cmnd *scsi_cmnd,
2275 int use_timer, int req_flags)
1da177e4 2276{
c41f8cbd
SS		 2277 struct zfcp_fsf_req *req;
2278 struct fcp_cmnd_iu *fcp_cmnd_iu;
2279 unsigned int sbtype;
2280 int real_bytes, retval = -EIO;
1da177e4 2281
c41f8cbd
SS		 2282 if (unlikely(!(atomic_read(&unit->status) &
2283 ZFCP_STATUS_COMMON_UNBLOCKED)))
2284 return -EBUSY;
1da177e4 2285
0406289e 2286 spin_lock(&adapter->req_q_lock);
2450d3e7 2287 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 2288 goto out;
2289 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2290 adapter->pool.fsf_req_scsi);
025270f0 2291 if (IS_ERR(req)) {
c41f8cbd
SS		 2292 retval = PTR_ERR(req);
2293 goto out;
2294 }
2295
2296 zfcp_unit_get(unit);
2297 req->unit = unit;
2298 req->data = scsi_cmnd;
2299 req->handler = zfcp_fsf_send_fcp_command_handler;
2300 req->qtcb->header.lun_handle = unit->handle;
2301 req->qtcb->header.port_handle = unit->port->handle;
2302 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2303
2304 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2305
2306 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2307 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2308 /*
2309 * set depending on data direction:
2310 * data direction bits in SBALE (SB Type)
2311 * data direction bits in QTCB
2312 * data direction bits in FCP_CMND IU
2313 */
2314 switch (scsi_cmnd->sc_data_direction) {
2315 case DMA_NONE:
2316 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2317 sbtype = SBAL_FLAGS0_TYPE_READ;
1da177e4 2318 break;
c41f8cbd
SS		 2319 case DMA_FROM_DEVICE:
2320 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2321 sbtype = SBAL_FLAGS0_TYPE_READ;
2322 fcp_cmnd_iu->rddata = 1;
2323 break;
2324 case DMA_TO_DEVICE:
2325 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2326 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2327 fcp_cmnd_iu->wddata = 1;
1da177e4 2328 break;
c41f8cbd 2329 case DMA_BIDIRECTIONAL:
1da177e4 2330 default:
c41f8cbd
SS		 2331 retval = -EIO;
2332 goto failed_scsi_cmnd;
1da177e4
LT		 2333 }
2334
c41f8cbd
SS		 2335 if (likely((scsi_cmnd->device->simple_tags) ||
2336 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2337 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2338 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2339 else
2340 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2341
c41f8cbd
SS		 2342 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2343 fcp_cmnd_iu->add_fcp_cdb_length =
2344 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2345
c41f8cbd 2346 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2347
c41f8cbd 2348 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2349 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2350
c41f8cbd
SS		 2351 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2352 scsi_sglist(scsi_cmnd),
2353 FSF_MAX_SBALS_PER_REQ);
2354 if (unlikely(real_bytes < 0)) {
2355 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2356 retval = -EIO;
2357 else {
2358 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2359 "Oversize data package, unit 0x%016Lx "
2360 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2361 (unsigned long long)unit->fcp_lun,
2362 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2363 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2364 retval = -EINVAL;
2365 }
2366 goto failed_scsi_cmnd;
1da177e4 2367 }
1da177e4 2368
c41f8cbd 2369 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2370
c41f8cbd
SS		 2371 if (use_timer)
2372 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 2373
c41f8cbd
SS		 2374 retval = zfcp_fsf_req_send(req);
2375 if (unlikely(retval))
2376 goto failed_scsi_cmnd;
1da177e4 2377
c41f8cbd 2378 goto out;
1da177e4 2379
c41f8cbd
SS		 2380failed_scsi_cmnd:
2381 zfcp_unit_put(unit);
2382 zfcp_fsf_req_free(req);
2383 scsi_cmnd->host_scribble = NULL;
2384out:
0406289e 2385 spin_unlock(&adapter->req_q_lock);
c41f8cbd 2386 return retval;
1da177e4
LT		 2387}
2388
2389/**
c41f8cbd
SS		 2390 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2391 * @adapter: pointer to struct zfcp-adapter
2392 * @unit: pointer to struct zfcp_unit
2393 * @tm_flags: unsigned byte for task management flags
2394 * @req_flags: int request flags
2395 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2396 */
c41f8cbd
SS		 2397struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2398 struct zfcp_unit *unit,
2399 u8 tm_flags, int req_flags)
1da177e4 2400{
44cc76f2 2401 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2402 struct zfcp_fsf_req *req = NULL;
2403 struct fcp_cmnd_iu *fcp_cmnd_iu;
1da177e4 2404
c41f8cbd
SS		 2405 if (unlikely(!(atomic_read(&unit->status) &
2406 ZFCP_STATUS_COMMON_UNBLOCKED)))
2407 return NULL;
1da177e4 2408
0406289e 2409 spin_lock(&adapter->req_q_lock);
2450d3e7 2410 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 2411 goto out;
2412 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2413 adapter->pool.fsf_req_scsi);
025270f0 2414 if (IS_ERR(req))
c41f8cbd 2415 goto out;
1da177e4 2416
c41f8cbd
SS		 2417 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2418 req->data = unit;
2419 req->handler = zfcp_fsf_send_fcp_command_handler;
2420 req->qtcb->header.lun_handle = unit->handle;
2421 req->qtcb->header.port_handle = unit->port->handle;
2422 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2423 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2424 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2425 sizeof(u32);
c41f8cbd
SS		 2426
2427 sbale = zfcp_qdio_sbale_req(req);
2428 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2429 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2430
c41f8cbd
SS		 2431 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2432 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2433 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2434
c41f8cbd
SS		 2435 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2436 if (!zfcp_fsf_req_send(req))
2437 goto out;
1da177e4 2438
c41f8cbd
SS		 2439 zfcp_fsf_req_free(req);
2440 req = NULL;
2441out:
0406289e 2442 spin_unlock(&adapter->req_q_lock);
c41f8cbd
SS		 2443 return req;
2444}
1da177e4 2445
c41f8cbd
SS		 2446static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2447{
2448 if (req->qtcb->header.fsf_status != FSF_GOOD)
2449 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2450}
2451
c41f8cbd
SS		 2452/**
2453 * zfcp_fsf_control_file - control file upload/download
2454 * @adapter: pointer to struct zfcp_adapter
2455 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2456 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2457 */
c41f8cbd
SS		 2458struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2459 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2460{
44cc76f2 2461 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2462 struct zfcp_fsf_req *req = NULL;
2463 struct fsf_qtcb_bottom_support *bottom;
2464 int direction, retval = -EIO, bytes;
2465
2466 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2467 return ERR_PTR(-EOPNOTSUPP);
2468
2469 switch (fsf_cfdc->command) {
2470 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2471 direction = SBAL_FLAGS0_TYPE_WRITE;
2472 break;
2473 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2474 direction = SBAL_FLAGS0_TYPE_READ;
2475 break;
2476 default:
2477 return ERR_PTR(-EINVAL);
2478 }
1da177e4 2479
0406289e 2480 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2481 if (zfcp_fsf_req_sbal_get(adapter))
2482 goto out;
1da177e4 2483
c41f8cbd 2484 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
025270f0 2485 if (IS_ERR(req)) {
c41f8cbd
SS		 2486 retval = -EPERM;
2487 goto out;
2488 }
1da177e4 2489
c41f8cbd 2490 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2491
c41f8cbd
SS		 2492 sbale = zfcp_qdio_sbale_req(req);
2493 sbale[0].flags |= direction;
8a36e453 2494
c41f8cbd
SS		 2495 bottom = &req->qtcb->bottom.support;
2496 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2497 bottom->option = fsf_cfdc->option;
8a36e453 2498
c41f8cbd
SS		 2499 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2500 FSF_MAX_SBALS_PER_REQ);
2501 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2502 retval = -ENOMEM;
2503 zfcp_fsf_req_free(req);
2504 goto out;
2505 }
1da177e4 2506
c41f8cbd
SS		 2507 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2508 retval = zfcp_fsf_req_send(req);
2509out:
0406289e 2510 spin_unlock_bh(&adapter->req_q_lock);
8a36e453 2511
c41f8cbd
SS		 2512 if (!retval) {
2513 wait_event(req->completion_wq,
2514 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2515 return req;
1da177e4 2516 }
c41f8cbd 2517 return ERR_PTR(retval);
1da177e4 2518}
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