projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] zfcp: Fix abort handler for completions in progress
[deliverable/linux.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 *
a2fa0aed 6 * Copyright IBM Corporation 2002, 2009
1da177e4
LT		 7 */
8
ecf39d42
CS		 9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
0997f1c5 12#include <linux/blktrace_api.h>
1da177e4
LT		 13#include "zfcp_ext.h"
14
63caf367
CS		 15#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
16#define ZFCP_REQ_NO_QTCB 0x00000008
17
287ac01a
CS		 18static void zfcp_fsf_request_timeout_handler(unsigned long data)
19{
20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
5ffd51a5
SS		 21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
22 "fsrth_1", NULL);
287ac01a
CS		 23}
24
25static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
26 unsigned long timeout)
27{
28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
29 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
30 fsf_req->timer.expires = jiffies + timeout;
31 add_timer(&fsf_req->timer);
32}
33
34static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
35{
36 BUG_ON(!fsf_req->erp_action);
37 fsf_req->timer.function = zfcp_erp_timeout_handler;
38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
39 fsf_req->timer.expires = jiffies + 30 * HZ;
40 add_timer(&fsf_req->timer);
41}
42
1da177e4
LT		 43/* association between FSF command and FSF QTCB type */
44static u32 fsf_qtcb_type[] = {
45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
58};
59
553448f6
CS		 60static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
61{
c41f8cbd 62 u16 subtable = table >> 16;
553448f6 63 u16 rule = table & 0xffff;
ff3b24fa 64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
553448f6 65
ff3b24fa 66 if (subtable && subtable < ARRAY_SIZE(act_type))
553448f6 67 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 68 "Access denied according to ACT rule type %s, "
69 "rule %d\n", act_type[subtable], rule);
553448f6
CS		 70}
71
72static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
73 struct zfcp_port *port)
74{
75 struct fsf_qtcb_header *header = &req->qtcb->header;
76 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 77 "Access denied to port 0x%016Lx\n",
7ba58c9c 78 (unsigned long long)port->wwpn);
553448f6
CS		 79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
5ffd51a5 81 zfcp_erp_port_access_denied(port, "fspad_1", req);
553448f6
CS		 82 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
83}
84
85static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
86 struct zfcp_unit *unit)
87{
88 struct fsf_qtcb_header *header = &req->qtcb->header;
89 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 91 (unsigned long long)unit->fcp_lun,
92 (unsigned long long)unit->port->wwpn);
553448f6
CS		 93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
5ffd51a5 95 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
553448f6
CS		 96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
97}
98
99static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
100{
ff3b24fa
CS		 101 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
102 "operational because of an unsupported FC class\n");
5ffd51a5 103 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
553448f6
CS		 104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
105}
106
c41f8cbd
SS		 107/**
108 * zfcp_fsf_req_free - free memory used by fsf request
109 * @fsf_req: pointer to struct zfcp_fsf_req
1da177e4 110 */
c41f8cbd 111void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
1da177e4 112{
c41f8cbd
SS		 113 if (likely(req->pool)) {
114 mempool_free(req, req->pool);
dd52e0ea
HC		 115 return;
116 }
117
c41f8cbd
SS		 118 if (req->qtcb) {
119 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
dd52e0ea
HC		 120 return;
121 }
1da177e4
LT		 122}
123
c41f8cbd
SS		 124/**
125 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
126 * @adapter: pointer to struct zfcp_adapter
127 *
869b2b44
MP		 128 * Never ever call this without shutting down the adapter first.
129 * Otherwise the adapter would continue using and corrupting s390 storage.
130 * Included BUG_ON() call to ensure this is done.
131 * ERP is supposed to be the only user of this function.
1da177e4 132 */
6fcc4711 133void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
1da177e4 134{
c41f8cbd 135 struct zfcp_fsf_req *req, *tmp;
fea9d6c7 136 unsigned long flags;
6fcc4711 137 LIST_HEAD(remove_queue);
869b2b44 138 unsigned int i;
fea9d6c7 139
c41f8cbd 140 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
fea9d6c7 141 spin_lock_irqsave(&adapter->req_list_lock, flags);
869b2b44 142 for (i = 0; i < REQUEST_LIST_SIZE; i++)
6fcc4711 143 list_splice_init(&adapter->req_list[i], &remove_queue);
fea9d6c7
VS		 144 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
145
c41f8cbd
SS		 146 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
147 list_del(&req->list);
148 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
149 zfcp_fsf_req_complete(req);
1da177e4 150 }
1da177e4
LT		 151}
152
c41f8cbd 153static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
1da177e4 154{
c41f8cbd
SS		 155 struct fsf_status_read_buffer *sr_buf = req->data;
156 struct zfcp_adapter *adapter = req->adapter;
157 struct zfcp_port *port;
158 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
159 unsigned long flags;
1da177e4 160
c41f8cbd
SS		 161 read_lock_irqsave(&zfcp_data.config_lock, flags);
162 list_for_each_entry(port, &adapter->port_list_head, list)
163 if (port->d_id == d_id) {
164 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
5ffd51a5 165 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
c41f8cbd
SS		 166 return;
167 }
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1da177e4
LT		 169}
170
5ffd51a5 171static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
c41f8cbd 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);
a2fa0aed 180 zfcp_scsi_schedule_rports_block(adapter);
ee69ab7a 181
c41f8cbd 182 if (!link_down)
2f8f3ed5 183 goto out;
ee69ab7a 184
aef4a983
MS		 185 switch (link_down->error_code) {
186 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 187 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 188 "There is no light signal from the local "
189 "fibre channel cable\n");
aef4a983
MS		 190 break;
191 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 192 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 193 "There is a wrap plug instead of a fibre "
194 "channel cable\n");
aef4a983
MS		 195 break;
196 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 197 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 198 "The adjacent fibre channel node does not "
199 "support FCP\n");
aef4a983
MS		 200 break;
201 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 202 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 203 "The FCP device is suspended because of a "
204 "firmware update\n");
553448f6 205 break;
aef4a983 206 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 207 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 208 "The FCP device detected a WWPN that is "
209 "duplicate or not valid\n");
aef4a983
MS		 210 break;
211 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 212 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 213 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 214 break;
215 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 216 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 217 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 218 break;
219 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 220 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 221 "The adjacent switch cannot support "
222 "more NPIV ports\n");
aef4a983
MS		 223 break;
224 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 225 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 226 "The FCP adapter could not log in to the "
227 "fibre channel fabric\n");
aef4a983
MS		 228 break;
229 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 230 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 231 "The WWPN assignment file on the FCP adapter "
232 "has been damaged\n");
aef4a983
MS		 233 break;
234 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 235 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 236 "The mode table on the FCP adapter "
237 "has been damaged\n");
aef4a983
MS		 238 break;
239 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 240 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 241 "All NPIV ports on the FCP adapter have "
242 "been assigned\n");
aef4a983
MS		 243 break;
244 default:
c41f8cbd 245 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 246 "The link between the FCP adapter and "
247 "the FC fabric is down\n");
aef4a983 248 }
c41f8cbd
SS		 249out:
250 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 251}
252
c41f8cbd 253static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 254{
c41f8cbd
SS		 255 struct fsf_status_read_buffer *sr_buf = req->data;
256 struct fsf_link_down_info *ldi =
257 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 258
c41f8cbd
SS		 259 switch (sr_buf->status_subtype) {
260 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
5ffd51a5 261 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
1da177e4 262 break;
c41f8cbd 263 case FSF_STATUS_READ_SUB_FDISC_FAILED:
5ffd51a5 264 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
1da177e4 265 break;
c41f8cbd 266 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
5ffd51a5 267 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
c41f8cbd
SS		 268 };
269}
1da177e4 270
c41f8cbd
SS		 271static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
272{
273 struct zfcp_adapter *adapter = req->adapter;
274 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 275
c41f8cbd
SS		 276 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
277 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
278 mempool_free(sr_buf, adapter->pool.data_status_read);
279 zfcp_fsf_req_free(req);
280 return;
281 }
1da177e4 282
c41f8cbd 283 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
1da177e4 284
c41f8cbd
SS		 285 switch (sr_buf->status_type) {
286 case FSF_STATUS_READ_PORT_CLOSED:
287 zfcp_fsf_status_read_port_closed(req);
1da177e4 288 break;
c41f8cbd
SS		 289 case FSF_STATUS_READ_INCOMING_ELS:
290 zfcp_fc_incoming_els(req);
1da177e4 291 break;
c41f8cbd 292 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 293 break;
c41f8cbd 294 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 295 dev_warn(&adapter->ccw_device->dev,
296 "The error threshold for checksum statistics "
297 "has been exceeded\n");
57069386 298 zfcp_hba_dbf_event_berr(adapter, req);
1da177e4 299 break;
c41f8cbd
SS		 300 case FSF_STATUS_READ_LINK_DOWN:
301 zfcp_fsf_status_read_link_down(req);
302 break;
303 case FSF_STATUS_READ_LINK_UP:
304 dev_info(&adapter->ccw_device->dev,
ff3b24fa 305 "The local link has been restored\n");
c41f8cbd 306 /* All ports should be marked as ready to run again */
5ffd51a5 307 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
c41f8cbd
SS		 308 ZFCP_STATUS_COMMON_RUNNING,
309 ZFCP_SET);
310 zfcp_erp_adapter_reopen(adapter,
311 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
312 ZFCP_STATUS_COMMON_ERP_FAILED,
5ffd51a5 313 "fssrh_2", req);
c41f8cbd
SS		 314 break;
315 case FSF_STATUS_READ_NOTIFICATION_LOST:
316 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
5ffd51a5
SS		 317 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
318 req);
c41f8cbd
SS		 319 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
320 schedule_work(&adapter->scan_work);
321 break;
322 case FSF_STATUS_READ_CFDC_UPDATED:
5ffd51a5 323 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
c41f8cbd
SS		 324 break;
325 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
326 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 327 break;
1da177e4
LT		 328 }
329
c41f8cbd
SS		 330 mempool_free(sr_buf, adapter->pool.data_status_read);
331 zfcp_fsf_req_free(req);
1da177e4 332
c41f8cbd 333 atomic_inc(&adapter->stat_miss);
b7f15f3c 334 queue_work(zfcp_data.work_queue, &adapter->stat_work);
c41f8cbd 335}
1da177e4 336
c41f8cbd
SS		 337static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
338{
339 switch (req->qtcb->header.fsf_status_qual.word[0]) {
340 case FSF_SQ_FCP_RSP_AVAILABLE:
341 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
342 case FSF_SQ_NO_RETRY_POSSIBLE:
343 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
344 return;
345 case FSF_SQ_COMMAND_ABORTED:
346 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
347 break;
348 case FSF_SQ_NO_RECOM:
349 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 350 "The FCP adapter reported a problem "
351 "that cannot be recovered\n");
5ffd51a5 352 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
c41f8cbd
SS		 353 break;
354 }
355 /* all non-return stats set FSFREQ_ERROR*/
356 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 357}
358
c41f8cbd 359static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 360{
c41f8cbd
SS		 361 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
362 return;
1da177e4 363
c41f8cbd
SS		 364 switch (req->qtcb->header.fsf_status) {
365 case FSF_UNKNOWN_COMMAND:
366 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 367 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd 368 req->qtcb->header.fsf_command);
5ffd51a5 369 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
c41f8cbd
SS		 370 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372 case FSF_ADAPTER_STATUS_AVAILABLE:
373 zfcp_fsf_fsfstatus_qual_eval(req);
374 break;
375 }
376}
1da177e4 377
c41f8cbd
SS		 378static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
379{
380 struct zfcp_adapter *adapter = req->adapter;
381 struct fsf_qtcb *qtcb = req->qtcb;
382 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 383
c41f8cbd 384 zfcp_hba_dbf_event_fsf_response(req);
1da177e4 385
c41f8cbd
SS		 386 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
387 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
388 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
389 return;
390 }
1da177e4 391
c41f8cbd
SS		 392 switch (qtcb->prefix.prot_status) {
393 case FSF_PROT_GOOD:
394 case FSF_PROT_FSF_STATUS_PRESENTED:
395 return;
396 case FSF_PROT_QTCB_VERSION_ERROR:
397 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 398 "QTCB version 0x%x not supported by FCP adapter "
399 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
400 psq->word[0], psq->word[1]);
5ffd51a5 401 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
c41f8cbd
SS		 402 break;
403 case FSF_PROT_ERROR_STATE:
404 case FSF_PROT_SEQ_NUMB_ERROR:
5ffd51a5 405 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
c41f8cbd
SS		 406 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
407 break;
408 case FSF_PROT_UNSUPP_QTCB_TYPE:
409 dev_err(&adapter->ccw_device->dev,
ff3b24fa 410 "The QTCB type is not supported by the FCP adapter\n");
5ffd51a5 411 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
c41f8cbd
SS		 412 break;
413 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
414 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
415 &adapter->status);
416 break;
417 case FSF_PROT_DUPLICATE_REQUEST_ID:
418 dev_err(&adapter->ccw_device->dev,
ff3b24fa 419 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd 420 (unsigned long long)qtcb->bottom.support.req_handle);
5ffd51a5 421 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
c41f8cbd
SS		 422 break;
423 case FSF_PROT_LINK_DOWN:
5ffd51a5
SS		 424 zfcp_fsf_link_down_info_eval(req, "fspse_5",
425 &psq->link_down_info);
c41f8cbd 426 /* FIXME: reopening adapter now? better wait for link up */
5ffd51a5 427 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
c41f8cbd
SS		 428 break;
429 case FSF_PROT_REEST_QUEUE:
430 /* All ports should be marked as ready to run again */
5ffd51a5 431 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
c41f8cbd
SS		 432 ZFCP_STATUS_COMMON_RUNNING,
433 ZFCP_SET);
434 zfcp_erp_adapter_reopen(adapter,
435 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
5ffd51a5
SS		 436 ZFCP_STATUS_COMMON_ERP_FAILED,
437 "fspse_8", req);
c41f8cbd
SS		 438 break;
439 default:
440 dev_err(&adapter->ccw_device->dev,
ff3b24fa 441 "0x%x is not a valid transfer protocol status\n",
c41f8cbd 442 qtcb->prefix.prot_status);
5ffd51a5 443 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
c41f8cbd
SS		 444 }
445 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 446}
447
c41f8cbd
SS		 448/**
449 * zfcp_fsf_req_complete - process completion of a FSF request
450 * @fsf_req: The FSF request that has been completed.
451 *
452 * When a request has been completed either from the FCP adapter,
453 * or it has been dismissed due to a queue shutdown, this function
454 * is called to process the completion status and trigger further
455 * events related to the FSF request.
456 */
457void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
1da177e4 458{
c41f8cbd
SS		 459 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
460 zfcp_fsf_status_read_handler(req);
461 return;
462 }
1da177e4 463
c41f8cbd
SS		 464 del_timer(&req->timer);
465 zfcp_fsf_protstatus_eval(req);
466 zfcp_fsf_fsfstatus_eval(req);
467 req->handler(req);
1da177e4 468
c41f8cbd 469 if (req->erp_action)
287ac01a 470 zfcp_erp_notify(req->erp_action, 0);
c41f8cbd 471 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
1da177e4 472
c41f8cbd
SS		 473 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
474 zfcp_fsf_req_free(req);
475 else
476 /* notify initiator waiting for the requests completion */
477 /*
478 * FIXME: Race! We must not access fsf_req here as it might have been
479 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
480 * flag. It's an improbable case. But, we have the same paranoia for
481 * the cleanup flag already.
482 * Might better be handled using complete()?
483 * (setting the flag and doing wakeup ought to be atomic
484 * with regard to checking the flag as long as waitqueue is
485 * part of the to be released structure)
486 */
487 wake_up(&req->completion_wq);
488}
1da177e4 489
c41f8cbd
SS		 490static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
491{
492 struct fsf_qtcb_bottom_config *bottom;
493 struct zfcp_adapter *adapter = req->adapter;
494 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 495
c41f8cbd 496 bottom = &req->qtcb->bottom.config;
1da177e4 497
c41f8cbd
SS		 498 if (req->data)
499 memcpy(req->data, bottom, sizeof(*bottom));
500
501 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
502 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
503 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
504 fc_host_speed(shost) = bottom->fc_link_speed;
505 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
506
507 adapter->hydra_version = bottom->adapter_type;
508 adapter->timer_ticks = bottom->timer_interval;
509
510 if (fc_host_permanent_port_name(shost) == -1)
511 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
512
513 switch (bottom->fc_topology) {
514 case FSF_TOPO_P2P:
515 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
516 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
517 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
518 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
c41f8cbd
SS		 519 break;
520 case FSF_TOPO_FABRIC:
521 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
c41f8cbd
SS		 522 break;
523 case FSF_TOPO_AL:
524 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
c41f8cbd 525 default:
c41f8cbd 526 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 527 "Unknown or unsupported arbitrated loop "
528 "fibre channel topology detected\n");
5ffd51a5 529 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
c41f8cbd 530 return -EIO;
1da177e4 531 }
c41f8cbd 532
1da177e4
LT		 533 return 0;
534}
535
c41f8cbd 536static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
553448f6
CS		 537{
538 struct zfcp_adapter *adapter = req->adapter;
c41f8cbd
SS		 539 struct fsf_qtcb *qtcb = req->qtcb;
540 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
541 struct Scsi_Host *shost = adapter->scsi_host;
553448f6 542
c41f8cbd
SS		 543 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
544 return;
1da177e4 545
c41f8cbd
SS		 546 adapter->fsf_lic_version = bottom->lic_version;
547 adapter->adapter_features = bottom->adapter_features;
548 adapter->connection_features = bottom->connection_features;
549 adapter->peer_wwpn = 0;
550 adapter->peer_wwnn = 0;
551 adapter->peer_d_id = 0;
8a36e453 552
c41f8cbd
SS		 553 switch (qtcb->header.fsf_status) {
554 case FSF_GOOD:
555 if (zfcp_fsf_exchange_config_evaluate(req))
556 return;
1da177e4 557
c41f8cbd
SS		 558 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
559 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 560 "FCP adapter maximum QTCB size (%d bytes) "
561 "is too small\n",
562 bottom->max_qtcb_size);
5ffd51a5 563 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
c41f8cbd
SS		 564 return;
565 }
566 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
567 &adapter->status);
1da177e4 568 break;
c41f8cbd
SS		 569 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
570 fc_host_node_name(shost) = 0;
571 fc_host_port_name(shost) = 0;
572 fc_host_port_id(shost) = 0;
573 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
574 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
575 adapter->hydra_version = 0;
1da177e4 576
c41f8cbd
SS		 577 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
578 &adapter->status);
1da177e4 579
5ffd51a5 580 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
c41f8cbd 581 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 582 break;
c41f8cbd 583 default:
5ffd51a5 584 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
c41f8cbd
SS		 585 return;
586 }
1da177e4 587
c41f8cbd
SS		 588 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
589 adapter->hardware_version = bottom->hardware_version;
590 memcpy(fc_host_serial_number(shost), bottom->serial_number,
591 min(FC_SERIAL_NUMBER_SIZE, 17));
592 EBCASC(fc_host_serial_number(shost),
593 min(FC_SERIAL_NUMBER_SIZE, 17));
594 }
1da177e4 595
c41f8cbd
SS		 596 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
597 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 598 "The FCP adapter only supports newer "
599 "control block versions\n");
5ffd51a5 600 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
c41f8cbd
SS		 601 return;
602 }
603 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
604 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 605 "The FCP adapter only supports older "
606 "control block versions\n");
5ffd51a5 607 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
c41f8cbd
SS		 608 }
609}
1da177e4 610
c41f8cbd
SS		 611static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
612{
613 struct zfcp_adapter *adapter = req->adapter;
614 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
615 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 616
c41f8cbd
SS		 617 if (req->data)
618 memcpy(req->data, bottom, sizeof(*bottom));
9eb69aff 619
0282985d 620 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
c41f8cbd 621 fc_host_permanent_port_name(shost) = bottom->wwpn;
0282985d
CS		 622 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
623 } else
c41f8cbd
SS		 624 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
625 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
626 fc_host_supported_speeds(shost) = bottom->supported_speed;
627}
1da177e4 628
c41f8cbd
SS		 629static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
630{
c41f8cbd
SS		 631 struct fsf_qtcb *qtcb = req->qtcb;
632
633 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
634 return;
635
636 switch (qtcb->header.fsf_status) {
637 case FSF_GOOD:
638 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 639 break;
640 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
641 zfcp_fsf_exchange_port_evaluate(req);
5ffd51a5 642 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
c41f8cbd 643 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 644 break;
1da177e4 645 }
c41f8cbd 646}
d26ab06e 647
c41f8cbd 648static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
dedbc2b3
CS		 649 __releases(&adapter->req_q_lock)
650 __acquires(&adapter->req_q_lock)
c41f8cbd 651{
dedbc2b3 652 struct zfcp_qdio_queue *req_q = &adapter->req_q;
c41f8cbd 653 long ret;
c41f8cbd 654
dedbc2b3
CS		 655 if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
656 return -EIO;
657 if (atomic_read(&req_q->count) > 0)
658 return 0;
659
660 atomic_dec(&req_q->count);
0406289e 661 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 662 ret = wait_event_interruptible_timeout(adapter->request_wq,
dedbc2b3
CS		 663 atomic_read(&req_q->count) >= 0,
664 5 * HZ);
665 spin_lock_bh(&adapter->req_q_lock);
666 atomic_inc(&req_q->count);
667
c41f8cbd
SS		 668 if (ret > 0)
669 return 0;
2450d3e7
SR		 670 if (!ret)
671 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd
SS		 672 return -EIO;
673}
674
675static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
676{
677 struct zfcp_fsf_req *req;
678 req = mempool_alloc(pool, GFP_ATOMIC);
679 if (!req)
680 return NULL;
681 memset(req, 0, sizeof(*req));
88f2a977 682 req->pool = pool;
c41f8cbd
SS		 683 return req;
684}
685
686static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
687{
688 struct zfcp_fsf_req_qtcb *qtcb;
689
690 if (likely(pool))
691 qtcb = mempool_alloc(pool, GFP_ATOMIC);
692 else
693 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
694 GFP_ATOMIC);
695 if (unlikely(!qtcb))
696 return NULL;
697
698 memset(qtcb, 0, sizeof(*qtcb));
699 qtcb->fsf_req.qtcb = &qtcb->qtcb;
700 qtcb->fsf_req.pool = pool;
701
702 return &qtcb->fsf_req;
703}
704
705static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
706 u32 fsf_cmd, int req_flags,
707 mempool_t *pool)
1da177e4 708{
44cc76f2 709 struct qdio_buffer_element *sbale;
1da177e4 710
c41f8cbd
SS		 711 struct zfcp_fsf_req *req;
712 struct zfcp_qdio_queue *req_q = &adapter->req_q;
951f746f 713
c41f8cbd
SS		 714 if (req_flags & ZFCP_REQ_NO_QTCB)
715 req = zfcp_fsf_alloc_noqtcb(pool);
716 else
717 req = zfcp_fsf_alloc_qtcb(pool);
1da177e4 718
c41f8cbd
SS		 719 if (unlikely(!req))
720 return ERR_PTR(-EIO);
1da177e4 721
c41f8cbd
SS		 722 if (adapter->req_no == 0)
723 adapter->req_no++;
1da177e4 724
c41f8cbd
SS		 725 INIT_LIST_HEAD(&req->list);
726 init_timer(&req->timer);
727 init_waitqueue_head(&req->completion_wq);
1da177e4 728
c41f8cbd
SS		 729 req->adapter = adapter;
730 req->fsf_command = fsf_cmd;
52bfb558 731 req->req_id = adapter->req_no;
c41f8cbd
SS		 732 req->sbal_number = 1;
733 req->sbal_first = req_q->first;
734 req->sbal_last = req_q->first;
735 req->sbale_curr = 1;
736
737 sbale = zfcp_qdio_sbale_req(req);
738 sbale[0].addr = (void *) req->req_id;
739 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
740
741 if (likely(req->qtcb)) {
742 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
743 req->qtcb->prefix.req_id = req->req_id;
744 req->qtcb->prefix.ulp_info = 26;
745 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
746 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
747 req->qtcb->header.req_handle = req->req_id;
748 req->qtcb->header.fsf_command = req->fsf_command;
749 req->seq_no = adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
751 sbale[1].addr = (void *) req->qtcb;
752 sbale[1].length = sizeof(struct fsf_qtcb);
753 }
754
755 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
756 zfcp_fsf_req_free(req);
757 return ERR_PTR(-EIO);
758 }
951f746f 759
c41f8cbd
SS		 760 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
761 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1da177e4 762
c41f8cbd 763 return req;
1da177e4
LT		 764}
765
c41f8cbd
SS		 766static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
767{
768 struct zfcp_adapter *adapter = req->adapter;
135ea137
MP		 769 unsigned long flags;
770 int idx;
771 int with_qtcb = (req->qtcb != NULL);
c41f8cbd
SS		 772
773 /* put allocated FSF request into hash table */
45316a86 774 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 775 idx = zfcp_reqlist_hash(req->req_id);
776 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 777 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 778
3765138a 779 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
c41f8cbd
SS		 780 req->issued = get_clock();
781 if (zfcp_qdio_send(req)) {
c41f8cbd 782 del_timer(&req->timer);
3765138a
CS		 783 spin_lock_irqsave(&adapter->req_list_lock, flags);
784 /* lookup request again, list might have changed */
785 if (zfcp_reqlist_find_safe(adapter, req))
786 zfcp_reqlist_remove(adapter, req);
787 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
5ffd51a5 788 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
c41f8cbd
SS		 789 return -EIO;
790 }
791
792 /* Don't increase for unsolicited status */
135ea137 793 if (with_qtcb)
c41f8cbd 794 adapter->fsf_req_seq_no++;
52bfb558 795 adapter->req_no++;
c41f8cbd
SS		 796
797 return 0;
798}
799
800/**
801 * zfcp_fsf_status_read - send status read request
802 * @adapter: pointer to struct zfcp_adapter
803 * @req_flags: request flags
804 * Returns: 0 on success, ERROR otherwise
1da177e4 805 */
c41f8cbd 806int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
1da177e4 807{
c41f8cbd
SS		 808 struct zfcp_fsf_req *req;
809 struct fsf_status_read_buffer *sr_buf;
44cc76f2 810 struct qdio_buffer_element *sbale;
c41f8cbd 811 int retval = -EIO;
1da177e4 812
0406289e 813 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 814 if (zfcp_fsf_req_sbal_get(adapter))
815 goto out;
816
817 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
818 ZFCP_REQ_NO_QTCB,
819 adapter->pool.fsf_req_status_read);
025270f0 820 if (IS_ERR(req)) {
c41f8cbd
SS		 821 retval = PTR_ERR(req);
822 goto out;
1da177e4
LT		 823 }
824
c41f8cbd
SS		 825 sbale = zfcp_qdio_sbale_req(req);
826 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
828 req->sbale_curr = 2;
829
830 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
837 sbale = zfcp_qdio_sbale_curr(req);
838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
059c97d0 840
c41f8cbd
SS		 841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
1da177e4 844
c41f8cbd
SS		 845 goto out;
846
847failed_req_send:
848 mempool_free(sr_buf, adapter->pool.data_status_read);
849failed_buf:
850 zfcp_fsf_req_free(req);
851 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
852out:
0406289e 853 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 854 return retval;
855}
856
857static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858{
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
1da177e4 866 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 867 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5
SS		 868 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
869 "fsafch1", req);
c41f8cbd 870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 871 }
872 break;
1da177e4 873 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd 874 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5 875 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
c41f8cbd 876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 877 }
878 break;
1da177e4 879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 881 break;
1da177e4 882 case FSF_PORT_BOXED:
5ffd51a5 883 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
c41f8cbd
SS		 884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 886 break;
1da177e4 887 case FSF_LUN_BOXED:
5ffd51a5 888 zfcp_erp_unit_boxed(unit, "fsafch4", req);
c41f8cbd
SS		 889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 891 break;
1da177e4 892 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 893 switch (fsq->word[0]) {
1da177e4 894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 895 zfcp_test_link(unit->port);
1da177e4 896 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 898 break;
1da177e4
LT		 899 }
900 break;
1da177e4 901 case FSF_GOOD:
c41f8cbd 902 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 903 break;
1da177e4 904 }
1da177e4
LT		 905}
906
907/**
c41f8cbd
SS		 908 * zfcp_fsf_abort_fcp_command - abort running SCSI command
909 * @old_req_id: unsigned long
c41f8cbd 910 * @unit: pointer to struct zfcp_unit
c41f8cbd 911 * Returns: pointer to struct zfcp_fsf_req
1da177e4 912 */
1da177e4 913
c41f8cbd 914struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
63caf367 915 struct zfcp_unit *unit)
1da177e4 916{
44cc76f2 917 struct qdio_buffer_element *sbale;
c41f8cbd 918 struct zfcp_fsf_req *req = NULL;
63caf367 919 struct zfcp_adapter *adapter = unit->port->adapter;
8a36e453 920
92cab0d9
CS		 921 spin_lock_bh(&adapter->req_q_lock);
922 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 923 goto out;
924 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
63caf367 925 0, adapter->pool.fsf_req_abort);
633528c3
SS		 926 if (IS_ERR(req)) {
927 req = NULL;
c41f8cbd 928 goto out;
633528c3 929 }
2abbe866 930
c41f8cbd
SS		 931 if (unlikely(!(atomic_read(&unit->status) &
932 ZFCP_STATUS_COMMON_UNBLOCKED)))
933 goto out_error_free;
1da177e4 934
c41f8cbd
SS		 935 sbale = zfcp_qdio_sbale_req(req);
936 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
937 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 938
c41f8cbd
SS		 939 req->data = unit;
940 req->handler = zfcp_fsf_abort_fcp_command_handler;
941 req->qtcb->header.lun_handle = unit->handle;
942 req->qtcb->header.port_handle = unit->port->handle;
943 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
944
945 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
946 if (!zfcp_fsf_req_send(req))
947 goto out;
948
949out_error_free:
950 zfcp_fsf_req_free(req);
951 req = NULL;
952out:
92cab0d9 953 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 954 return req;
1da177e4
LT		 955}
956
c41f8cbd 957static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 958{
c41f8cbd
SS		 959 struct zfcp_adapter *adapter = req->adapter;
960 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 961 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 962
c41f8cbd 963 send_ct->status = -EINVAL;
1da177e4 964
c41f8cbd 965 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 966 goto skip_fsfstatus;
967
1da177e4 968 switch (header->fsf_status) {
1da177e4 969 case FSF_GOOD:
c41f8cbd
SS		 970 zfcp_san_dbf_event_ct_response(req);
971 send_ct->status = 0;
1da177e4 972 break;
1da177e4 973 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 974 zfcp_fsf_class_not_supp(req);
1da177e4 975 break;
1da177e4 976 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 977 switch (header->fsf_status_qual.word[0]){
978 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 979 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 980 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 981 break;
1da177e4
LT		 982 }
983 break;
1da177e4 984 case FSF_ACCESS_DENIED:
1da177e4 985 break;
1da177e4 986 case FSF_PORT_BOXED:
c41f8cbd
SS		 987 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
988 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 989 break;
c41f8cbd 990 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 991 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
c41f8cbd 992 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 993 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 994 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 995 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 996 case FSF_SBAL_MISMATCH:
c41f8cbd 997 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 998 break;
999 }
1000
1001skip_fsfstatus:
c41f8cbd 1002 if (send_ct->handler)
1da177e4 1003 send_ct->handler(send_ct->handler_data);
c41f8cbd 1004}
1da177e4 1005
39eb7e9a
CS		 1006static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1007 struct scatterlist *sg_req,
1008 struct scatterlist *sg_resp,
1009 int max_sbals)
c41f8cbd 1010{
39eb7e9a
CS		 1011 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1012 u32 feat = req->adapter->adapter_features;
c41f8cbd
SS		 1013 int bytes;
1014
39eb7e9a
CS		 1015 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1016 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1017 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1018 return -EOPNOTSUPP;
1019
1020 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1021 sbale[2].addr = sg_virt(sg_req);
1022 sbale[2].length = sg_req->length;
1023 sbale[3].addr = sg_virt(sg_resp);
1024 sbale[3].length = sg_resp->length;
1025 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1026 return 0;
1027 }
1028
c41f8cbd
SS		 1029 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1030 sg_req, max_sbals);
1031 if (bytes <= 0)
1032 return -ENOMEM;
1033 req->qtcb->bottom.support.req_buf_length = bytes;
1034 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1035
1036 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1037 sg_resp, max_sbals);
1038 if (bytes <= 0)
1039 return -ENOMEM;
1040 req->qtcb->bottom.support.resp_buf_length = bytes;
1041
1042 return 0;
1da177e4
LT		 1043}
1044
1045/**
c41f8cbd
SS		 1046 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1047 * @ct: pointer to struct zfcp_send_ct with data for request
1048 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1049 * @erp_action: if non-null the Generic Service request sent within ERP
1da177e4 1050 */
c41f8cbd
SS		 1051int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1052 struct zfcp_erp_action *erp_action)
1da177e4 1053{
5ab944f9
SS		 1054 struct zfcp_wka_port *wka_port = ct->wka_port;
1055 struct zfcp_adapter *adapter = wka_port->adapter;
c41f8cbd
SS		 1056 struct zfcp_fsf_req *req;
1057 int ret = -EIO;
1da177e4 1058
0406289e 1059 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1060 if (zfcp_fsf_req_sbal_get(adapter))
1061 goto out;
1da177e4 1062
c41f8cbd
SS		 1063 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1064 ZFCP_REQ_AUTO_CLEANUP, pool);
025270f0 1065 if (IS_ERR(req)) {
c41f8cbd
SS		 1066 ret = PTR_ERR(req);
1067 goto out;
3f0ca62a
CS		 1068 }
1069
39eb7e9a
CS		 1070 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1071 FSF_MAX_SBALS_PER_REQ);
553448f6 1072 if (ret)
1da177e4 1073 goto failed_send;
1da177e4 1074
c41f8cbd 1075 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1076 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1077 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1078 req->qtcb->bottom.support.timeout = ct->timeout;
1079 req->data = ct;
1080
1081 zfcp_san_dbf_event_ct_request(req);
1082
1083 if (erp_action) {
1084 erp_action->fsf_req = req;
1085 req->erp_action = erp_action;
287ac01a 1086 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 1087 } else
1088 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1089
c41f8cbd
SS		 1090 ret = zfcp_fsf_req_send(req);
1091 if (ret)
1092 goto failed_send;
1da177e4 1093
c41f8cbd 1094 goto out;
1da177e4 1095
c41f8cbd
SS		 1096failed_send:
1097 zfcp_fsf_req_free(req);
1098 if (erp_action)
1099 erp_action->fsf_req = NULL;
1100out:
0406289e 1101 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1102 return ret;
1da177e4
LT		 1103}
1104
c41f8cbd 1105static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1106{
c41f8cbd
SS		 1107 struct zfcp_send_els *send_els = req->data;
1108 struct zfcp_port *port = send_els->port;
1109 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1110
c41f8cbd 1111 send_els->status = -EINVAL;
1da177e4 1112
c41f8cbd 1113 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1114 goto skip_fsfstatus;
1115
1116 switch (header->fsf_status) {
1da177e4 1117 case FSF_GOOD:
c41f8cbd
SS		 1118 zfcp_san_dbf_event_els_response(req);
1119 send_els->status = 0;
1da177e4 1120 break;
1da177e4 1121 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1122 zfcp_fsf_class_not_supp(req);
1da177e4 1123 break;
1da177e4 1124 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1125 switch (header->fsf_status_qual.word[0]){
1126 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1127 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1128 zfcp_test_link(port);
c41f8cbd 1129 /*fall through */
1da177e4 1130 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1131 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1132 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1133 break;
1da177e4
LT		 1134 }
1135 break;
1da177e4 1136 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1137 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1138 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1139 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1140 break;
1da177e4 1141 case FSF_ACCESS_DENIED:
c41f8cbd 1142 zfcp_fsf_access_denied_port(req, port);
1da177e4 1143 break;
c41f8cbd
SS		 1144 case FSF_SBAL_MISMATCH:
1145 /* should never occure, avoided in zfcp_fsf_send_els */
1146 /* fall through */
1da177e4 1147 default:
c41f8cbd 1148 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1149 break;
1150 }
1da177e4 1151skip_fsfstatus:
aa551daf 1152 if (send_els->handler)
1da177e4 1153 send_els->handler(send_els->handler_data);
c41f8cbd 1154}
1da177e4 1155
c41f8cbd
SS		 1156/**
1157 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1158 * @els: pointer to struct zfcp_send_els with data for the command
1159 */
1160int zfcp_fsf_send_els(struct zfcp_send_els *els)
1161{
1162 struct zfcp_fsf_req *req;
1163 struct zfcp_adapter *adapter = els->adapter;
1164 struct fsf_qtcb_bottom_support *bottom;
1165 int ret = -EIO;
1166
8fdf30d5
CS		 1167 spin_lock_bh(&adapter->req_q_lock);
1168 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1169 goto out;
1170 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1171 ZFCP_REQ_AUTO_CLEANUP, NULL);
025270f0 1172 if (IS_ERR(req)) {
c41f8cbd
SS		 1173 ret = PTR_ERR(req);
1174 goto out;
1175 }
1176
39eb7e9a 1177 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
44cc76f2 1178
c41f8cbd
SS		 1179 if (ret)
1180 goto failed_send;
1181
1182 bottom = &req->qtcb->bottom.support;
1183 req->handler = zfcp_fsf_send_els_handler;
1184 bottom->d_id = els->d_id;
1185 bottom->service_class = FSF_CLASS_3;
1186 bottom->timeout = 2 * R_A_TOV;
1187 req->data = els;
1188
1189 zfcp_san_dbf_event_els_request(req);
1190
1191 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1192 ret = zfcp_fsf_req_send(req);
1193 if (ret)
1194 goto failed_send;
1195
1196 goto out;
1197
1198failed_send:
1199 zfcp_fsf_req_free(req);
1200out:
8fdf30d5 1201 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1202 return ret;
1da177e4
LT		 1203}
1204
c41f8cbd 1205int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1206{
44cc76f2 1207 struct qdio_buffer_element *sbale;
c41f8cbd 1208 struct zfcp_fsf_req *req;
52ef11a7 1209 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd
SS		 1210 int retval = -EIO;
1211
0406289e 1212 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1213 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1214 goto out;
1215 req = zfcp_fsf_req_create(adapter,
1216 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1217 ZFCP_REQ_AUTO_CLEANUP,
1218 adapter->pool.fsf_req_erp);
025270f0 1219 if (IS_ERR(req)) {
c41f8cbd
SS		 1220 retval = PTR_ERR(req);
1221 goto out;
1da177e4
LT		 1222 }
1223
c41f8cbd 1224 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1225 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1226 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1227
c41f8cbd 1228 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1229 FSF_FEATURE_CFDC |
1230 FSF_FEATURE_LUN_SHARING |
9eb69aff 1231 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1232 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1233 req->erp_action = erp_action;
1234 req->handler = zfcp_fsf_exchange_config_data_handler;
1235 erp_action->fsf_req = req;
1da177e4 1236
287ac01a 1237 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1238 retval = zfcp_fsf_req_send(req);
1da177e4 1239 if (retval) {
c41f8cbd 1240 zfcp_fsf_req_free(req);
1da177e4 1241 erp_action->fsf_req = NULL;
1da177e4 1242 }
c41f8cbd 1243out:
0406289e 1244 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1245 return retval;
1246}
1da177e4 1247
c41f8cbd
SS		 1248int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1249 struct fsf_qtcb_bottom_config *data)
52ef11a7 1250{
44cc76f2 1251 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1252 struct zfcp_fsf_req *req = NULL;
1253 int retval = -EIO;
1254
0406289e 1255 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1256 if (zfcp_fsf_req_sbal_get(adapter))
ada81b74 1257 goto out_unlock;
c41f8cbd
SS		 1258
1259 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1260 0, NULL);
025270f0 1261 if (IS_ERR(req)) {
c41f8cbd 1262 retval = PTR_ERR(req);
ada81b74 1263 goto out_unlock;
52ef11a7
SS		 1264 }
1265
c41f8cbd 1266 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1267 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1268 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1269 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1270
c41f8cbd 1271 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1272 FSF_FEATURE_CFDC |
1273 FSF_FEATURE_LUN_SHARING |
1274 FSF_FEATURE_NOTIFICATION_LOST |
1275 FSF_FEATURE_UPDATE_ALERT;
1276
1277 if (data)
c41f8cbd 1278 req->data = data;
52ef11a7 1279
c41f8cbd
SS		 1280 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1281 retval = zfcp_fsf_req_send(req);
0406289e 1282 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1283 if (!retval)
c41f8cbd
SS		 1284 wait_event(req->completion_wq,
1285 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7 1286
c41f8cbd 1287 zfcp_fsf_req_free(req);
ada81b74 1288 return retval;
52ef11a7 1289
ada81b74
CS		 1290out_unlock:
1291 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1292 return retval;
1293}
1294
1da177e4
LT		 1295/**
1296 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1297 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1298 * Returns: 0 on success, error otherwise
1da177e4 1299 */
c41f8cbd 1300int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1301{
44cc76f2 1302 struct qdio_buffer_element *sbale;
c41f8cbd 1303 struct zfcp_fsf_req *req;
52ef11a7 1304 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd 1305 int retval = -EIO;
1da177e4 1306
553448f6 1307 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1308 return -EOPNOTSUPP;
1da177e4 1309
0406289e 1310 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1311 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1312 goto out;
1313 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1314 ZFCP_REQ_AUTO_CLEANUP,
1315 adapter->pool.fsf_req_erp);
025270f0 1316 if (IS_ERR(req)) {
c41f8cbd
SS		 1317 retval = PTR_ERR(req);
1318 goto out;
aef4a983
MS		 1319 }
1320
c41f8cbd 1321 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1322 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1323 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1324
c41f8cbd
SS		 1325 req->handler = zfcp_fsf_exchange_port_data_handler;
1326 req->erp_action = erp_action;
1327 erp_action->fsf_req = req;
52ef11a7 1328
287ac01a 1329 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1330 retval = zfcp_fsf_req_send(req);
1da177e4 1331 if (retval) {
c41f8cbd 1332 zfcp_fsf_req_free(req);
52ef11a7
SS		 1333 erp_action->fsf_req = NULL;
1334 }
c41f8cbd 1335out:
0406289e 1336 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1337 return retval;
1338}
1339
52ef11a7
SS		 1340/**
1341 * zfcp_fsf_exchange_port_data_sync - request information about local port
c41f8cbd
SS		 1342 * @adapter: pointer to struct zfcp_adapter
1343 * @data: pointer to struct fsf_qtcb_bottom_port
1344 * Returns: 0 on success, error otherwise
52ef11a7 1345 */
c41f8cbd
SS		 1346int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1347 struct fsf_qtcb_bottom_port *data)
52ef11a7 1348{
44cc76f2 1349 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1350 struct zfcp_fsf_req *req = NULL;
1351 int retval = -EIO;
52ef11a7 1352
553448f6 1353 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1354 return -EOPNOTSUPP;
52ef11a7 1355
0406289e 1356 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1357 if (zfcp_fsf_req_sbal_get(adapter))
ada81b74 1358 goto out_unlock;
c41f8cbd
SS		 1359
1360 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1361 NULL);
025270f0 1362 if (IS_ERR(req)) {
c41f8cbd 1363 retval = PTR_ERR(req);
ada81b74 1364 goto out_unlock;
1da177e4
LT		 1365 }
1366
52ef11a7 1367 if (data)
c41f8cbd 1368 req->data = data;
52ef11a7 1369
c41f8cbd 1370 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1371 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1372 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1373
c41f8cbd
SS		 1374 req->handler = zfcp_fsf_exchange_port_data_handler;
1375 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1376 retval = zfcp_fsf_req_send(req);
0406289e 1377 spin_unlock_bh(&adapter->req_q_lock);
ada81b74 1378
553448f6 1379 if (!retval)
c41f8cbd
SS		 1380 wait_event(req->completion_wq,
1381 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1382 zfcp_fsf_req_free(req);
1da177e4 1383
1da177e4 1384 return retval;
ada81b74
CS		 1385
1386out_unlock:
1387 spin_unlock_bh(&adapter->req_q_lock);
1388 return retval;
1da177e4
LT		 1389}
1390
c41f8cbd 1391static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1392{
c41f8cbd
SS		 1393 struct zfcp_port *port = req->data;
1394 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1395 struct fsf_plogi *plogi;
1da177e4 1396
c41f8cbd 1397 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1398 return;
1da177e4 1399
1da177e4 1400 switch (header->fsf_status) {
1da177e4 1401 case FSF_PORT_ALREADY_OPEN:
1da177e4 1402 break;
1da177e4 1403 case FSF_ACCESS_DENIED:
c41f8cbd 1404 zfcp_fsf_access_denied_port(req, port);
1da177e4 1405 break;
1da177e4 1406 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1407 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1408 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1409 "remote port 0x%016Lx\n",
1410 (unsigned long long)port->wwpn);
5ffd51a5 1411 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1412 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1413 break;
1da177e4 1414 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1415 switch (header->fsf_status_qual.word[0]) {
1416 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1417 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1418 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1419 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1420 break;
1421 }
1422 break;
1da177e4 1423 case FSF_GOOD:
1da177e4 1424 port->handle = header->port_handle;
1da177e4
LT		 1425 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1426 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1427 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1428 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1429 &port->status);
1da177e4
LT		 1430 /* check whether D_ID has changed during open */
1431 /*
1432 * FIXME: This check is not airtight, as the FCP channel does
1433 * not monitor closures of target port connections caused on
1434 * the remote side. Thus, they might miss out on invalidating
1435 * locally cached WWPNs (and other N_Port parameters) of gone
1436 * target ports. So, our heroic attempt to make things safe
1437 * could be undermined by 'open port' response data tagged with
1438 * obsolete WWPNs. Another reason to monitor potential
1439 * connection closures ourself at least (by interpreting
1440 * incoming ELS' and unsolicited status). It just crosses my
1441 * mind that one should be able to cross-check by means of
1442 * another GID_PN straight after a port has been opened.
1443 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1444 */
c41f8cbd 1445 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1446 if (req->qtcb->bottom.support.els1_length >=
1447 FSF_PLOGI_MIN_LEN) {
c41f8cbd 1448 if (plogi->serv_param.wwpn != port->wwpn)
b98478d7 1449 port->d_id = 0;
c41f8cbd
SS		 1450 else {
1451 port->wwnn = plogi->serv_param.wwnn;
1452 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1453 }
1454 }
1455 break;
1da177e4 1456 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1457 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1458 break;
1459 }
1da177e4
LT		 1460}
1461
c41f8cbd
SS		 1462/**
1463 * zfcp_fsf_open_port - create and send open port request
1464 * @erp_action: pointer to struct zfcp_erp_action
1465 * Returns: 0 on success, error otherwise
1da177e4 1466 */
c41f8cbd 1467int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1468{
44cc76f2 1469 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1470 struct zfcp_adapter *adapter = erp_action->adapter;
1471 struct zfcp_fsf_req *req;
1472 int retval = -EIO;
1473
0406289e 1474 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1475 if (zfcp_fsf_req_sbal_get(adapter))
1476 goto out;
1477
1478 req = zfcp_fsf_req_create(adapter,
1479 FSF_QTCB_OPEN_PORT_WITH_DID,
1480 ZFCP_REQ_AUTO_CLEANUP,
1481 adapter->pool.fsf_req_erp);
025270f0 1482 if (IS_ERR(req)) {
c41f8cbd 1483 retval = PTR_ERR(req);
1da177e4 1484 goto out;
c41f8cbd 1485 }
1da177e4 1486
c41f8cbd 1487 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1488 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1489 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1490
c41f8cbd
SS		 1491 req->handler = zfcp_fsf_open_port_handler;
1492 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1493 req->data = erp_action->port;
1494 req->erp_action = erp_action;
1495 erp_action->fsf_req = req;
c41f8cbd 1496
287ac01a 1497 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1498 retval = zfcp_fsf_req_send(req);
1da177e4 1499 if (retval) {
c41f8cbd 1500 zfcp_fsf_req_free(req);
1da177e4 1501 erp_action->fsf_req = NULL;
1da177e4 1502 }
c41f8cbd 1503out:
0406289e 1504 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1505 return retval;
1506}
1507
c41f8cbd 1508static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1509{
c41f8cbd 1510 struct zfcp_port *port = req->data;
1da177e4 1511
c41f8cbd 1512 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1513 return;
1da177e4 1514
c41f8cbd 1515 switch (req->qtcb->header.fsf_status) {
1da177e4 1516 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1517 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1518 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1519 break;
1da177e4 1520 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1521 break;
1da177e4 1522 case FSF_GOOD:
5ffd51a5 1523 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1524 ZFCP_STATUS_COMMON_OPEN,
1525 ZFCP_CLEAR);
1da177e4 1526 break;
1da177e4 1527 }
1da177e4
LT		 1528}
1529
c41f8cbd
SS		 1530/**
1531 * zfcp_fsf_close_port - create and send close port request
1532 * @erp_action: pointer to struct zfcp_erp_action
1533 * Returns: 0 on success, error otherwise
1da177e4 1534 */
c41f8cbd 1535int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1536{
44cc76f2 1537 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1538 struct zfcp_adapter *adapter = erp_action->adapter;
1539 struct zfcp_fsf_req *req;
1540 int retval = -EIO;
1541
0406289e 1542 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1543 if (zfcp_fsf_req_sbal_get(adapter))
1544 goto out;
1545
1546 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1547 ZFCP_REQ_AUTO_CLEANUP,
1548 adapter->pool.fsf_req_erp);
025270f0 1549 if (IS_ERR(req)) {
c41f8cbd 1550 retval = PTR_ERR(req);
1da177e4 1551 goto out;
c41f8cbd 1552 }
1da177e4 1553
c41f8cbd 1554 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1555 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1556 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1557
c41f8cbd
SS		 1558 req->handler = zfcp_fsf_close_port_handler;
1559 req->data = erp_action->port;
1560 req->erp_action = erp_action;
1561 req->qtcb->header.port_handle = erp_action->port->handle;
1562 erp_action->fsf_req = req;
c41f8cbd 1563
287ac01a 1564 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1565 retval = zfcp_fsf_req_send(req);
1da177e4 1566 if (retval) {
c41f8cbd 1567 zfcp_fsf_req_free(req);
1da177e4 1568 erp_action->fsf_req = NULL;
1da177e4 1569 }
c41f8cbd 1570out:
0406289e 1571 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1572 return retval;
1573}
1574
5ab944f9
SS		 1575static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1576{
1577 struct zfcp_wka_port *wka_port = req->data;
1578 struct fsf_qtcb_header *header = &req->qtcb->header;
1579
1580 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1581 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1582 goto out;
1583 }
1584
1585 switch (header->fsf_status) {
1586 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1587 dev_warn(&req->adapter->ccw_device->dev,
1588 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1589 case FSF_ADAPTER_STATUS_AVAILABLE:
1590 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1591 case FSF_ACCESS_DENIED:
1592 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1593 break;
1594 case FSF_PORT_ALREADY_OPEN:
1c1cba17 1595 break;
5ab944f9
SS		 1596 case FSF_GOOD:
1597 wka_port->handle = header->port_handle;
1598 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1599 }
1600out:
1601 wake_up(&wka_port->completion_wq);
1602}
1603
1604/**
1605 * zfcp_fsf_open_wka_port - create and send open wka-port request
1606 * @wka_port: pointer to struct zfcp_wka_port
1607 * Returns: 0 on success, error otherwise
1608 */
1609int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1610{
1611 struct qdio_buffer_element *sbale;
1612 struct zfcp_adapter *adapter = wka_port->adapter;
1613 struct zfcp_fsf_req *req;
1614 int retval = -EIO;
1615
0406289e 1616 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1617 if (zfcp_fsf_req_sbal_get(adapter))
1618 goto out;
1619
1620 req = zfcp_fsf_req_create(adapter,
1621 FSF_QTCB_OPEN_PORT_WITH_DID,
1622 ZFCP_REQ_AUTO_CLEANUP,
1623 adapter->pool.fsf_req_erp);
1624 if (unlikely(IS_ERR(req))) {
1625 retval = PTR_ERR(req);
1626 goto out;
1627 }
1628
1629 sbale = zfcp_qdio_sbale_req(req);
1630 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1631 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1632
1633 req->handler = zfcp_fsf_open_wka_port_handler;
1634 req->qtcb->bottom.support.d_id = wka_port->d_id;
1635 req->data = wka_port;
1636
1637 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1638 retval = zfcp_fsf_req_send(req);
1639 if (retval)
1640 zfcp_fsf_req_free(req);
1641out:
0406289e 1642 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1643 return retval;
1644}
1645
1646static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1647{
1648 struct zfcp_wka_port *wka_port = req->data;
1649
1650 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1651 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1652 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1653 }
1654
1655 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1656 wake_up(&wka_port->completion_wq);
1657}
1658
1659/**
1660 * zfcp_fsf_close_wka_port - create and send close wka port request
1661 * @erp_action: pointer to struct zfcp_erp_action
1662 * Returns: 0 on success, error otherwise
1663 */
1664int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1665{
1666 struct qdio_buffer_element *sbale;
1667 struct zfcp_adapter *adapter = wka_port->adapter;
1668 struct zfcp_fsf_req *req;
1669 int retval = -EIO;
1670
0406289e 1671 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1672 if (zfcp_fsf_req_sbal_get(adapter))
1673 goto out;
1674
1675 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1676 ZFCP_REQ_AUTO_CLEANUP,
1677 adapter->pool.fsf_req_erp);
1678 if (unlikely(IS_ERR(req))) {
1679 retval = PTR_ERR(req);
1680 goto out;
1681 }
1682
1683 sbale = zfcp_qdio_sbale_req(req);
1684 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1685 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1686
1687 req->handler = zfcp_fsf_close_wka_port_handler;
1688 req->data = wka_port;
1689 req->qtcb->header.port_handle = wka_port->handle;
1690
1691 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1692 retval = zfcp_fsf_req_send(req);
1693 if (retval)
1694 zfcp_fsf_req_free(req);
1695out:
0406289e 1696 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1697 return retval;
1698}
1699
c41f8cbd 1700static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1701{
c41f8cbd
SS		 1702 struct zfcp_port *port = req->data;
1703 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1704 struct zfcp_unit *unit;
1da177e4 1705
c41f8cbd 1706 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1707 return;
1da177e4 1708
1da177e4 1709 switch (header->fsf_status) {
1da177e4 1710 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1711 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1712 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1713 break;
1da177e4 1714 case FSF_ACCESS_DENIED:
c41f8cbd 1715 zfcp_fsf_access_denied_port(req, port);
1da177e4 1716 break;
1da177e4 1717 case FSF_PORT_BOXED:
5ffd51a5 1718 zfcp_erp_port_boxed(port, "fscpph2", req);
c41f8cbd
SS		 1719 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1720 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 1721 /* can't use generic zfcp_erp_modify_port_status because
1722 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1723 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1724 list_for_each_entry(unit, &port->unit_list_head, list)
1725 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1726 &unit->status);
1da177e4 1727 break;
1da177e4 1728 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1729 switch (header->fsf_status_qual.word[0]) {
1730 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1731 /* fall through */
1da177e4 1732 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1733 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1734 break;
1da177e4
LT		 1735 }
1736 break;
1da177e4 1737 case FSF_GOOD:
1da177e4
LT		 1738 /* can't use generic zfcp_erp_modify_port_status because
1739 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1740 */
1741 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1742 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1743 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1744 &unit->status);
1da177e4 1745 break;
1da177e4 1746 }
1da177e4
LT		 1747}
1748
c41f8cbd
SS		 1749/**
1750 * zfcp_fsf_close_physical_port - close physical port
1751 * @erp_action: pointer to struct zfcp_erp_action
1752 * Returns: 0 on success
1da177e4 1753 */
c41f8cbd 1754int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1755{
44cc76f2 1756 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1757 struct zfcp_adapter *adapter = erp_action->adapter;
1758 struct zfcp_fsf_req *req;
1759 int retval = -EIO;
1760
0406289e 1761 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1762 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1763 goto out;
1da177e4 1764
c41f8cbd
SS		 1765 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1766 ZFCP_REQ_AUTO_CLEANUP,
1767 adapter->pool.fsf_req_erp);
025270f0 1768 if (IS_ERR(req)) {
c41f8cbd
SS		 1769 retval = PTR_ERR(req);
1770 goto out;
1771 }
1da177e4 1772
c41f8cbd
SS		 1773 sbale = zfcp_qdio_sbale_req(req);
1774 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1775 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1776
c41f8cbd
SS		 1777 req->data = erp_action->port;
1778 req->qtcb->header.port_handle = erp_action->port->handle;
1779 req->erp_action = erp_action;
1780 req->handler = zfcp_fsf_close_physical_port_handler;
1781 erp_action->fsf_req = req;
c41f8cbd 1782
287ac01a 1783 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1784 retval = zfcp_fsf_req_send(req);
1da177e4 1785 if (retval) {
c41f8cbd 1786 zfcp_fsf_req_free(req);
1da177e4 1787 erp_action->fsf_req = NULL;
1da177e4 1788 }
c41f8cbd 1789out:
0406289e 1790 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1791 return retval;
1792}
1793
c41f8cbd 1794static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1795{
c41f8cbd
SS		 1796 struct zfcp_adapter *adapter = req->adapter;
1797 struct zfcp_unit *unit = req->data;
1798 struct fsf_qtcb_header *header = &req->qtcb->header;
1799 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1800 struct fsf_queue_designator *queue_designator =
1801 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1802 int exclusive, readwrite;
1da177e4 1803
c41f8cbd 1804 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1805 return;
1da177e4 1806
1da177e4 1807 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1808 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1809 ZFCP_STATUS_UNIT_SHARED |
1810 ZFCP_STATUS_UNIT_READONLY,
1811 &unit->status);
1812
1da177e4
LT		 1813 switch (header->fsf_status) {
1814
1815 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1816 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1817 /* fall through */
1da177e4 1818 case FSF_LUN_ALREADY_OPEN:
1da177e4 1819 break;
1da177e4 1820 case FSF_ACCESS_DENIED:
c41f8cbd 1821 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1822 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1823 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1824 break;
1da177e4 1825 case FSF_PORT_BOXED:
5ffd51a5 1826 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1827 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1828 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1829 break;
1da177e4 1830 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1831 if (header->fsf_status_qual.word[0])
553448f6 1832 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1833 "LUN 0x%Lx on port 0x%Lx is already in "
1834 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1835 (unsigned long long)unit->fcp_lun,
1836 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1837 queue_designator->cssid,
1838 queue_designator->hla);
c41f8cbd 1839 else
553448f6
CS		 1840 zfcp_act_eval_err(adapter,
1841 header->fsf_status_qual.word[2]);
5ffd51a5 1842 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1843 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1844 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1845 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1846 break;
1da177e4 1847 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1848 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1849 "No handle is available for LUN "
1850 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1851 (unsigned long long)unit->fcp_lun,
1852 (unsigned long long)unit->port->wwpn);
5ffd51a5 1853 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1854 /* fall through */
1855 case FSF_INVALID_COMMAND_OPTION:
1856 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1857 break;
1da177e4 1858 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1859 switch (header->fsf_status_qual.word[0]) {
1860 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1861 zfcp_test_link(unit->port);
c41f8cbd 1862 /* fall through */
1da177e4 1863 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1864 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1865 break;
1da177e4
LT		 1866 }
1867 break;
1868
1da177e4 1869 case FSF_GOOD:
1da177e4 1870 unit->handle = header->lun_handle;
1da177e4 1871 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1872
1873 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1874 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1875 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1876 exclusive = (bottom->lun_access_info &
1877 FSF_UNIT_ACCESS_EXCLUSIVE);
1878 readwrite = (bottom->lun_access_info &
1879 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1880
1da177e4
LT		 1881 if (!exclusive)
1882 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1883 &unit->status);
1884
1885 if (!readwrite) {
1886 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1887 &unit->status);
c41f8cbd 1888 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1889 "SCSI device at LUN 0x%016Lx on port "
1890 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1891 (unsigned long long)unit->fcp_lun,
1892 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1893 }
1894
1895 if (exclusive && !readwrite) {
c41f8cbd 1896 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1897 "Exclusive read-only access not "
1898 "supported (unit 0x%016Lx, "
1899 "port 0x%016Lx)\n",
7ba58c9c
SS		 1900 (unsigned long long)unit->fcp_lun,
1901 (unsigned long long)unit->port->wwpn);
5ffd51a5 1902 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1904 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1905 } else if (!exclusive && readwrite) {
c41f8cbd 1906 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1907 "Shared read-write access not "
1908 "supported (unit 0x%016Lx, port "
27c3f0a6 1909 "0x%016Lx)\n",
7ba58c9c
SS		 1910 (unsigned long long)unit->fcp_lun,
1911 (unsigned long long)unit->port->wwpn);
5ffd51a5 1912 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1913 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1914 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1915 }
1916 }
1da177e4 1917 break;
1da177e4 1918 }
1da177e4
LT		 1919}
1920
c41f8cbd
SS		 1921/**
1922 * zfcp_fsf_open_unit - open unit
1923 * @erp_action: pointer to struct zfcp_erp_action
1924 * Returns: 0 on success, error otherwise
1da177e4 1925 */
c41f8cbd 1926int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1927{
44cc76f2 1928 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1929 struct zfcp_adapter *adapter = erp_action->adapter;
1930 struct zfcp_fsf_req *req;
1931 int retval = -EIO;
1932
0406289e 1933 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1934 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1935 goto out;
1da177e4 1936
c41f8cbd
SS		 1937 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1938 ZFCP_REQ_AUTO_CLEANUP,
1939 adapter->pool.fsf_req_erp);
025270f0 1940 if (IS_ERR(req)) {
c41f8cbd
SS		 1941 retval = PTR_ERR(req);
1942 goto out;
1943 }
1944
1945 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1946 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1947 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1948
c41f8cbd
SS		 1949 req->qtcb->header.port_handle = erp_action->port->handle;
1950 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1951 req->handler = zfcp_fsf_open_unit_handler;
1952 req->data = erp_action->unit;
1953 req->erp_action = erp_action;
1954 erp_action->fsf_req = req;
1955
1956 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1957 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1958
287ac01a 1959 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1960 retval = zfcp_fsf_req_send(req);
1da177e4 1961 if (retval) {
c41f8cbd 1962 zfcp_fsf_req_free(req);
1da177e4 1963 erp_action->fsf_req = NULL;
1da177e4 1964 }
c41f8cbd 1965out:
0406289e 1966 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1967 return retval;
1968}
1969
c41f8cbd 1970static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1971{
c41f8cbd 1972 struct zfcp_unit *unit = req->data;
1da177e4 1973
c41f8cbd 1974 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1975 return;
1da177e4 1976
c41f8cbd 1977 switch (req->qtcb->header.fsf_status) {
1da177e4 1978 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1979 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 1980 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1981 break;
1da177e4 1982 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 1983 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 1984 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1985 break;
1da177e4 1986 case FSF_PORT_BOXED:
5ffd51a5 1987 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 1988 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1989 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1990 break;
1da177e4 1991 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 1992 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 1993 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1994 zfcp_test_link(unit->port);
c41f8cbd 1995 /* fall through */
1da177e4 1996 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1997 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1998 break;
1999 }
2000 break;
1da177e4 2001 case FSF_GOOD:
1da177e4 2002 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2003 break;
1da177e4 2004 }
1da177e4
LT		 2005}
2006
2007/**
c41f8cbd
SS		 2008 * zfcp_fsf_close_unit - close zfcp unit
2009 * @erp_action: pointer to struct zfcp_unit
2010 * Returns: 0 on success, error otherwise
1da177e4 2011 */
c41f8cbd 2012int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2013{
44cc76f2 2014 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2015 struct zfcp_adapter *adapter = erp_action->adapter;
2016 struct zfcp_fsf_req *req;
2017 int retval = -EIO;
1da177e4 2018
0406289e 2019 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 2020 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 2021 goto out;
c41f8cbd
SS		 2022 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2023 ZFCP_REQ_AUTO_CLEANUP,
2024 adapter->pool.fsf_req_erp);
025270f0 2025 if (IS_ERR(req)) {
c41f8cbd
SS		 2026 retval = PTR_ERR(req);
2027 goto out;
2028 }
1da177e4 2029
c41f8cbd
SS		 2030 sbale = zfcp_qdio_sbale_req(req);
2031 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2032 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2033
c41f8cbd
SS		 2034 req->qtcb->header.port_handle = erp_action->port->handle;
2035 req->qtcb->header.lun_handle = erp_action->unit->handle;
2036 req->handler = zfcp_fsf_close_unit_handler;
2037 req->data = erp_action->unit;
2038 req->erp_action = erp_action;
2039 erp_action->fsf_req = req;
fdf23452 2040
287ac01a 2041 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2042 retval = zfcp_fsf_req_send(req);
2043 if (retval) {
2044 zfcp_fsf_req_free(req);
2045 erp_action->fsf_req = NULL;
2046 }
2047out:
0406289e 2048 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 2049 return retval;
1da177e4
LT		 2050}
2051
c9615858
CS		 2052static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2053{
2054 lat_rec->sum += lat;
c41f8cbd
SS		 2055 lat_rec->min = min(lat_rec->min, lat);
2056 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2057}
2058
c41f8cbd 2059static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2060{
2061 struct fsf_qual_latency_info *lat_inf;
2062 struct latency_cont *lat;
c41f8cbd 2063 struct zfcp_unit *unit = req->unit;
c9615858 2064
c41f8cbd 2065 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2066
c41f8cbd 2067 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2068 case FSF_DATADIR_READ:
2069 lat = &unit->latencies.read;
2070 break;
2071 case FSF_DATADIR_WRITE:
2072 lat = &unit->latencies.write;
2073 break;
2074 case FSF_DATADIR_CMND:
2075 lat = &unit->latencies.cmd;
2076 break;
2077 default:
2078 return;
2079 }
2080
49f0f01c 2081 spin_lock(&unit->latencies.lock);
c9615858
CS		 2082 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2083 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2084 lat->counter++;
49f0f01c 2085 spin_unlock(&unit->latencies.lock);
1da177e4
LT		 2086}
2087
0997f1c5
SR		 2088#ifdef CONFIG_BLK_DEV_IO_TRACE
2089static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2090{
2091 struct fsf_qual_latency_info *lat_inf;
2092 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2093 struct request *req = scsi_cmnd->request;
2094 struct zfcp_blk_drv_data trace;
2095 int ticks = fsf_req->adapter->timer_ticks;
2096
2097 trace.flags = 0;
2098 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2099 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2100 trace.flags |= ZFCP_BLK_LAT_VALID;
2101 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2102 trace.channel_lat = lat_inf->channel_lat * ticks;
2103 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2104 }
2105 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2106 trace.flags |= ZFCP_BLK_REQ_ERROR;
2107 trace.inb_usage = fsf_req->qdio_inb_usage;
2108 trace.outb_usage = fsf_req->qdio_outb_usage;
2109
2110 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2111}
2112#else
2113static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2114{
2115}
2116#endif
2117
c41f8cbd 2118static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2119{
0ac55aa9 2120 struct scsi_cmnd *scpnt;
1da177e4 2121 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2122 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2123 u32 sns_len;
f76af7d7 2124 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2125 unsigned long flags;
1da177e4 2126
c41f8cbd
SS		 2127 read_lock_irqsave(&req->adapter->abort_lock, flags);
2128
0ac55aa9
SS		 2129 scpnt = req->data;
2130 if (unlikely(!scpnt)) {
2131 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2132 return;
2133 }
2134
c41f8cbd 2135 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2136 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2137 goto skip_fsfstatus;
2138 }
2139
c41f8cbd 2140 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2141 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2142 goto skip_fsfstatus;
2143 }
2144
feac6a07 2145 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2146
1da177e4 2147 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2148
c41f8cbd
SS		 2149 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2150 zfcp_fsf_req_latency(req);
c9615858 2151
0997f1c5
SR		 2152 zfcp_fsf_trace_latency(req);
2153
1da177e4 2154 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2155 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2156 set_host_byte(scpnt, DID_OK);
c41f8cbd 2157 else {
feac6a07 2158 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2159 goto skip_fsfstatus;
1da177e4
LT		 2160 }
2161 }
2162
1da177e4 2163 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2164 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2165 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2166 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2167 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2168
9d058ecf 2169 memcpy(scpnt->sense_buffer,
1da177e4 2170 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2171 }
2172
1da177e4 2173 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2174 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2175 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2176 scpnt->underflow)
feac6a07 2177 set_host_byte(scpnt, DID_ERROR);
1da177e4 2178 }
c41f8cbd 2179skip_fsfstatus:
8a36e453 2180 if (scpnt->result != 0)
c41f8cbd 2181 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
8a36e453 2182 else if (scpnt->retries > 0)
c41f8cbd 2183 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
8a36e453 2184 else
c41f8cbd 2185 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
1da177e4 2186
1da177e4 2187 scpnt->host_scribble = NULL;
1da177e4 2188 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2189 /*
2190 * We must hold this lock until scsi_done has been called.
2191 * Otherwise we may call scsi_done after abort regarding this
2192 * command has completed.
2193 * Note: scsi_done must not block!
2194 */
c41f8cbd 2195 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2196}
2197
c41f8cbd 2198static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2199{
1da177e4 2200 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2201 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2202 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2203
c41f8cbd
SS		 2204 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2205 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2206 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2207}
2208
2209
2210static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2211{
2212 struct zfcp_unit *unit;
2213 struct fsf_qtcb_header *header = &req->qtcb->header;
2214
2215 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2216 unit = req->data;
2217 else
2218 unit = req->unit;
2219
2220 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2221 goto skip_fsfstatus;
1da177e4 2222
c41f8cbd
SS		 2223 switch (header->fsf_status) {
2224 case FSF_HANDLE_MISMATCH:
2225 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2226 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2227 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2228 break;
2229 case FSF_FCPLUN_NOT_VALID:
2230 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2231 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2232 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2233 break;
c41f8cbd
SS		 2234 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2235 zfcp_fsf_class_not_supp(req);
1da177e4 2236 break;
c41f8cbd
SS		 2237 case FSF_ACCESS_DENIED:
2238 zfcp_fsf_access_denied_unit(req, unit);
2239 break;
2240 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2241 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2242 "Incorrect direction %d, unit 0x%016Lx on port "
2243 "0x%016Lx closed\n",
c41f8cbd 2244 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2245 (unsigned long long)unit->fcp_lun,
2246 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2247 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2248 req);
c41f8cbd
SS		 2249 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2250 break;
2251 case FSF_CMND_LENGTH_NOT_VALID:
2252 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2253 "Incorrect CDB length %d, unit 0x%016Lx on "
2254 "port 0x%016Lx closed\n",
c41f8cbd 2255 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2256 (unsigned long long)unit->fcp_lun,
2257 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2258 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2259 req);
c41f8cbd
SS		 2260 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2261 break;
2262 case FSF_PORT_BOXED:
5ffd51a5 2263 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2264 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2265 ZFCP_STATUS_FSFREQ_RETRY;
2266 break;
2267 case FSF_LUN_BOXED:
5ffd51a5 2268 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2269 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2270 ZFCP_STATUS_FSFREQ_RETRY;
2271 break;
2272 case FSF_ADAPTER_STATUS_AVAILABLE:
2273 if (header->fsf_status_qual.word[0] ==
2274 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2275 zfcp_test_link(unit->port);
2276 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2277 break;
1da177e4 2278 }
c41f8cbd
SS		 2279skip_fsfstatus:
2280 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2281 zfcp_fsf_send_fcp_ctm_handler(req);
2282 else {
2283 zfcp_fsf_send_fcp_command_task_handler(req);
2284 req->unit = NULL;
2285 zfcp_unit_put(unit);
2286 }
1da177e4
LT		 2287}
2288
7ba58c9c
SS		 2289static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2290{
2291 u32 *fcp_dl_ptr;
2292
2293 /*
2294 * fcp_dl_addr = start address of fcp_cmnd structure +
2295 * size of fixed part + size of dynamically sized add_dcp_cdb field
2296 * SEE FCP-2 documentation
2297 */
2298 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2299 (fcp_cmd->add_fcp_cdb_length << 2));
2300 *fcp_dl_ptr = fcp_dl;
2301}
2302
c41f8cbd
SS		 2303/**
2304 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2305 * @unit: unit where command is sent to
2306 * @scsi_cmnd: scsi command to be sent
1da177e4 2307 */
63caf367
CS		 2308int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2309 struct scsi_cmnd *scsi_cmnd)
1da177e4 2310{
c41f8cbd
SS		 2311 struct zfcp_fsf_req *req;
2312 struct fcp_cmnd_iu *fcp_cmnd_iu;
2313 unsigned int sbtype;
2314 int real_bytes, retval = -EIO;
63caf367 2315 struct zfcp_adapter *adapter = unit->port->adapter;
1da177e4 2316
c41f8cbd
SS		 2317 if (unlikely(!(atomic_read(&unit->status) &
2318 ZFCP_STATUS_COMMON_UNBLOCKED)))
2319 return -EBUSY;
1da177e4 2320
0406289e 2321 spin_lock(&adapter->req_q_lock);
8fdf30d5
CS		 2322 if (atomic_read(&adapter->req_q.count) <= 0) {
2323 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd 2324 goto out;
8fdf30d5 2325 }
63caf367
CS		 2326 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2327 ZFCP_REQ_AUTO_CLEANUP,
c41f8cbd 2328 adapter->pool.fsf_req_scsi);
025270f0 2329 if (IS_ERR(req)) {
c41f8cbd
SS		 2330 retval = PTR_ERR(req);
2331 goto out;
2332 }
2333
2334 zfcp_unit_get(unit);
2335 req->unit = unit;
2336 req->data = scsi_cmnd;
2337 req->handler = zfcp_fsf_send_fcp_command_handler;
2338 req->qtcb->header.lun_handle = unit->handle;
2339 req->qtcb->header.port_handle = unit->port->handle;
2340 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2341
2342 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2343
2344 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2345 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2346 /*
2347 * set depending on data direction:
2348 * data direction bits in SBALE (SB Type)
2349 * data direction bits in QTCB
2350 * data direction bits in FCP_CMND IU
2351 */
2352 switch (scsi_cmnd->sc_data_direction) {
2353 case DMA_NONE:
2354 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2355 sbtype = SBAL_FLAGS0_TYPE_READ;
1da177e4 2356 break;
c41f8cbd
SS		 2357 case DMA_FROM_DEVICE:
2358 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2359 sbtype = SBAL_FLAGS0_TYPE_READ;
2360 fcp_cmnd_iu->rddata = 1;
2361 break;
2362 case DMA_TO_DEVICE:
2363 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2364 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2365 fcp_cmnd_iu->wddata = 1;
1da177e4 2366 break;
c41f8cbd 2367 case DMA_BIDIRECTIONAL:
1da177e4 2368 default:
c41f8cbd
SS		 2369 retval = -EIO;
2370 goto failed_scsi_cmnd;
1da177e4
LT		 2371 }
2372
c41f8cbd
SS		 2373 if (likely((scsi_cmnd->device->simple_tags) ||
2374 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2375 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2376 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2377 else
2378 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2379
c41f8cbd
SS		 2380 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2381 fcp_cmnd_iu->add_fcp_cdb_length =
2382 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2383
c41f8cbd 2384 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2385
c41f8cbd 2386 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2387 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2388
c41f8cbd
SS		 2389 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2390 scsi_sglist(scsi_cmnd),
2391 FSF_MAX_SBALS_PER_REQ);
2392 if (unlikely(real_bytes < 0)) {
2393 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2394 retval = -EIO;
2395 else {
2396 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2397 "Oversize data package, unit 0x%016Lx "
2398 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2399 (unsigned long long)unit->fcp_lun,
2400 (unsigned long long)unit->port->wwpn);
5ffd51a5 2401 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2402 retval = -EINVAL;
2403 }
2404 goto failed_scsi_cmnd;
1da177e4 2405 }
1da177e4 2406
c41f8cbd 2407 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2408
c41f8cbd
SS		 2409 retval = zfcp_fsf_req_send(req);
2410 if (unlikely(retval))
2411 goto failed_scsi_cmnd;
1da177e4 2412
c41f8cbd 2413 goto out;
1da177e4 2414
c41f8cbd
SS		 2415failed_scsi_cmnd:
2416 zfcp_unit_put(unit);
2417 zfcp_fsf_req_free(req);
2418 scsi_cmnd->host_scribble = NULL;
2419out:
0406289e 2420 spin_unlock(&adapter->req_q_lock);
c41f8cbd 2421 return retval;
1da177e4
LT		 2422}
2423
2424/**
c41f8cbd 2425 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2426 * @unit: pointer to struct zfcp_unit
2427 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2428 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2429 */
63caf367 2430struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2431{
44cc76f2 2432 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2433 struct zfcp_fsf_req *req = NULL;
2434 struct fcp_cmnd_iu *fcp_cmnd_iu;
63caf367 2435 struct zfcp_adapter *adapter = unit->port->adapter;
1da177e4 2436
c41f8cbd
SS		 2437 if (unlikely(!(atomic_read(&unit->status) &
2438 ZFCP_STATUS_COMMON_UNBLOCKED)))
2439 return NULL;
1da177e4 2440
92cab0d9
CS		 2441 spin_lock_bh(&adapter->req_q_lock);
2442 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd 2443 goto out;
63caf367 2444 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
c41f8cbd 2445 adapter->pool.fsf_req_scsi);
633528c3
SS		 2446 if (IS_ERR(req)) {
2447 req = NULL;
c41f8cbd 2448 goto out;
633528c3 2449 }
1da177e4 2450
c41f8cbd
SS		 2451 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2452 req->data = unit;
2453 req->handler = zfcp_fsf_send_fcp_command_handler;
2454 req->qtcb->header.lun_handle = unit->handle;
2455 req->qtcb->header.port_handle = unit->port->handle;
2456 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2457 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2458 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2459 sizeof(u32);
c41f8cbd
SS		 2460
2461 sbale = zfcp_qdio_sbale_req(req);
2462 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2463 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2464
c41f8cbd
SS		 2465 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2466 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2467 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2468
c41f8cbd
SS		 2469 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2470 if (!zfcp_fsf_req_send(req))
2471 goto out;
1da177e4 2472
c41f8cbd
SS		 2473 zfcp_fsf_req_free(req);
2474 req = NULL;
2475out:
92cab0d9 2476 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2477 return req;
2478}
1da177e4 2479
c41f8cbd
SS		 2480static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2481{
1da177e4
LT		 2482}
2483
c41f8cbd
SS		 2484/**
2485 * zfcp_fsf_control_file - control file upload/download
2486 * @adapter: pointer to struct zfcp_adapter
2487 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2488 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2489 */
c41f8cbd
SS		 2490struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2491 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2492{
44cc76f2 2493 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2494 struct zfcp_fsf_req *req = NULL;
2495 struct fsf_qtcb_bottom_support *bottom;
2496 int direction, retval = -EIO, bytes;
2497
2498 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2499 return ERR_PTR(-EOPNOTSUPP);
2500
2501 switch (fsf_cfdc->command) {
2502 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2503 direction = SBAL_FLAGS0_TYPE_WRITE;
2504 break;
2505 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2506 direction = SBAL_FLAGS0_TYPE_READ;
2507 break;
2508 default:
2509 return ERR_PTR(-EINVAL);
2510 }
1da177e4 2511
0406289e 2512 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2513 if (zfcp_fsf_req_sbal_get(adapter))
2514 goto out;
1da177e4 2515
c41f8cbd 2516 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
025270f0 2517 if (IS_ERR(req)) {
c41f8cbd
SS		 2518 retval = -EPERM;
2519 goto out;
2520 }
1da177e4 2521
c41f8cbd 2522 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2523
c41f8cbd
SS		 2524 sbale = zfcp_qdio_sbale_req(req);
2525 sbale[0].flags |= direction;
8a36e453 2526
c41f8cbd
SS		 2527 bottom = &req->qtcb->bottom.support;
2528 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2529 bottom->option = fsf_cfdc->option;
8a36e453 2530
c41f8cbd
SS		 2531 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2532 FSF_MAX_SBALS_PER_REQ);
2533 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2534 retval = -ENOMEM;
2535 zfcp_fsf_req_free(req);
2536 goto out;
2537 }
1da177e4 2538
c41f8cbd
SS		 2539 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2540 retval = zfcp_fsf_req_send(req);
2541out:
0406289e 2542 spin_unlock_bh(&adapter->req_q_lock);
8a36e453 2543
c41f8cbd
SS		 2544 if (!retval) {
2545 wait_event(req->completion_wq,
2546 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2547 return req;
1da177e4 2548 }
c41f8cbd 2549 return ERR_PTR(retval);
1da177e4 2550}
Linux kernel - Deliverables
This page took 1.622032 seconds and 5 git commands to generate.