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[SCSI] fix q->lock not held warning when target is busy
[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;
45316a86 769 unsigned long flags;
c41f8cbd
SS		 770 int idx;
771
772 /* put allocated FSF request into hash table */
45316a86 773 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 774 idx = zfcp_reqlist_hash(req->req_id);
775 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 776 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 777
3765138a 778 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
c41f8cbd
SS		 779 req->issued = get_clock();
780 if (zfcp_qdio_send(req)) {
c41f8cbd 781 del_timer(&req->timer);
3765138a
CS		 782 spin_lock_irqsave(&adapter->req_list_lock, flags);
783 /* lookup request again, list might have changed */
784 if (zfcp_reqlist_find_safe(adapter, req))
785 zfcp_reqlist_remove(adapter, req);
786 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
5ffd51a5 787 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
c41f8cbd
SS		 788 return -EIO;
789 }
790
791 /* Don't increase for unsolicited status */
792 if (req->qtcb)
793 adapter->fsf_req_seq_no++;
52bfb558 794 adapter->req_no++;
c41f8cbd
SS		 795
796 return 0;
797}
798
799/**
800 * zfcp_fsf_status_read - send status read request
801 * @adapter: pointer to struct zfcp_adapter
802 * @req_flags: request flags
803 * Returns: 0 on success, ERROR otherwise
1da177e4 804 */
c41f8cbd 805int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
1da177e4 806{
c41f8cbd
SS		 807 struct zfcp_fsf_req *req;
808 struct fsf_status_read_buffer *sr_buf;
44cc76f2 809 struct qdio_buffer_element *sbale;
c41f8cbd 810 int retval = -EIO;
1da177e4 811
0406289e 812 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 813 if (zfcp_fsf_req_sbal_get(adapter))
814 goto out;
815
816 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
817 ZFCP_REQ_NO_QTCB,
818 adapter->pool.fsf_req_status_read);
025270f0 819 if (IS_ERR(req)) {
c41f8cbd
SS		 820 retval = PTR_ERR(req);
821 goto out;
1da177e4
LT		 822 }
823
c41f8cbd
SS		 824 sbale = zfcp_qdio_sbale_req(req);
825 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
826 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
827 req->sbale_curr = 2;
828
829 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
830 if (!sr_buf) {
831 retval = -ENOMEM;
832 goto failed_buf;
833 }
834 memset(sr_buf, 0, sizeof(*sr_buf));
835 req->data = sr_buf;
836 sbale = zfcp_qdio_sbale_curr(req);
837 sbale->addr = (void *) sr_buf;
838 sbale->length = sizeof(*sr_buf);
059c97d0 839
c41f8cbd
SS		 840 retval = zfcp_fsf_req_send(req);
841 if (retval)
842 goto failed_req_send;
1da177e4 843
c41f8cbd
SS		 844 goto out;
845
846failed_req_send:
847 mempool_free(sr_buf, adapter->pool.data_status_read);
848failed_buf:
849 zfcp_fsf_req_free(req);
850 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
851out:
0406289e 852 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 853 return retval;
854}
855
856static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
857{
858 struct zfcp_unit *unit = req->data;
859 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
860
861 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
862 return;
863
864 switch (req->qtcb->header.fsf_status) {
1da177e4 865 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 866 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5
SS		 867 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
868 "fsafch1", req);
c41f8cbd 869 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 870 }
871 break;
1da177e4 872 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd 873 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5 874 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
c41f8cbd 875 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 876 }
877 break;
1da177e4 878 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 879 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 880 break;
1da177e4 881 case FSF_PORT_BOXED:
5ffd51a5 882 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
c41f8cbd
SS		 883 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
884 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 885 break;
1da177e4 886 case FSF_LUN_BOXED:
5ffd51a5 887 zfcp_erp_unit_boxed(unit, "fsafch4", req);
c41f8cbd
SS		 888 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
889 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 890 break;
1da177e4 891 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 892 switch (fsq->word[0]) {
1da177e4 893 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 894 zfcp_test_link(unit->port);
1da177e4 895 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 896 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 897 break;
1da177e4
LT		 898 }
899 break;
1da177e4 900 case FSF_GOOD:
c41f8cbd 901 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 902 break;
1da177e4 903 }
1da177e4
LT		 904}
905
906/**
c41f8cbd
SS		 907 * zfcp_fsf_abort_fcp_command - abort running SCSI command
908 * @old_req_id: unsigned long
c41f8cbd 909 * @unit: pointer to struct zfcp_unit
c41f8cbd 910 * Returns: pointer to struct zfcp_fsf_req
1da177e4 911 */
1da177e4 912
c41f8cbd 913struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
63caf367 914 struct zfcp_unit *unit)
1da177e4 915{
44cc76f2 916 struct qdio_buffer_element *sbale;
c41f8cbd 917 struct zfcp_fsf_req *req = NULL;
63caf367 918 struct zfcp_adapter *adapter = unit->port->adapter;
8a36e453 919
92cab0d9
CS		 920 spin_lock_bh(&adapter->req_q_lock);
921 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 922 goto out;
923 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
63caf367 924 0, adapter->pool.fsf_req_abort);
633528c3
SS		 925 if (IS_ERR(req)) {
926 req = NULL;
c41f8cbd 927 goto out;
633528c3 928 }
2abbe866 929
c41f8cbd
SS		 930 if (unlikely(!(atomic_read(&unit->status) &
931 ZFCP_STATUS_COMMON_UNBLOCKED)))
932 goto out_error_free;
1da177e4 933
c41f8cbd
SS		 934 sbale = zfcp_qdio_sbale_req(req);
935 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
936 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 937
c41f8cbd
SS		 938 req->data = unit;
939 req->handler = zfcp_fsf_abort_fcp_command_handler;
940 req->qtcb->header.lun_handle = unit->handle;
941 req->qtcb->header.port_handle = unit->port->handle;
942 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
943
944 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
945 if (!zfcp_fsf_req_send(req))
946 goto out;
947
948out_error_free:
949 zfcp_fsf_req_free(req);
950 req = NULL;
951out:
92cab0d9 952 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 953 return req;
1da177e4
LT		 954}
955
c41f8cbd 956static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 957{
c41f8cbd
SS		 958 struct zfcp_adapter *adapter = req->adapter;
959 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 960 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 961
c41f8cbd 962 send_ct->status = -EINVAL;
1da177e4 963
c41f8cbd 964 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 965 goto skip_fsfstatus;
966
1da177e4 967 switch (header->fsf_status) {
1da177e4 968 case FSF_GOOD:
c41f8cbd
SS		 969 zfcp_san_dbf_event_ct_response(req);
970 send_ct->status = 0;
1da177e4 971 break;
1da177e4 972 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 973 zfcp_fsf_class_not_supp(req);
1da177e4 974 break;
1da177e4 975 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 976 switch (header->fsf_status_qual.word[0]){
977 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 978 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 979 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 980 break;
1da177e4
LT		 981 }
982 break;
1da177e4 983 case FSF_ACCESS_DENIED:
1da177e4 984 break;
1da177e4 985 case FSF_PORT_BOXED:
c41f8cbd
SS		 986 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
987 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 988 break;
c41f8cbd 989 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 990 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
c41f8cbd 991 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 992 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 993 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 994 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 995 case FSF_SBAL_MISMATCH:
c41f8cbd 996 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 997 break;
998 }
999
1000skip_fsfstatus:
c41f8cbd 1001 if (send_ct->handler)
1da177e4 1002 send_ct->handler(send_ct->handler_data);
c41f8cbd 1003}
1da177e4 1004
39eb7e9a
CS		 1005static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1006 struct scatterlist *sg_req,
1007 struct scatterlist *sg_resp,
1008 int max_sbals)
c41f8cbd 1009{
39eb7e9a
CS		 1010 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1011 u32 feat = req->adapter->adapter_features;
c41f8cbd
SS		 1012 int bytes;
1013
39eb7e9a
CS		 1014 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1015 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1016 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1017 return -EOPNOTSUPP;
1018
1019 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1020 sbale[2].addr = sg_virt(sg_req);
1021 sbale[2].length = sg_req->length;
1022 sbale[3].addr = sg_virt(sg_resp);
1023 sbale[3].length = sg_resp->length;
1024 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1025 return 0;
1026 }
1027
c41f8cbd
SS		 1028 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1029 sg_req, max_sbals);
1030 if (bytes <= 0)
1031 return -ENOMEM;
1032 req->qtcb->bottom.support.req_buf_length = bytes;
1033 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1034
1035 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1036 sg_resp, max_sbals);
1037 if (bytes <= 0)
1038 return -ENOMEM;
1039 req->qtcb->bottom.support.resp_buf_length = bytes;
1040
1041 return 0;
1da177e4
LT		 1042}
1043
1044/**
c41f8cbd
SS		 1045 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1046 * @ct: pointer to struct zfcp_send_ct with data for request
1047 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1048 * @erp_action: if non-null the Generic Service request sent within ERP
1da177e4 1049 */
c41f8cbd
SS		 1050int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1051 struct zfcp_erp_action *erp_action)
1da177e4 1052{
5ab944f9
SS		 1053 struct zfcp_wka_port *wka_port = ct->wka_port;
1054 struct zfcp_adapter *adapter = wka_port->adapter;
c41f8cbd
SS		 1055 struct zfcp_fsf_req *req;
1056 int ret = -EIO;
1da177e4 1057
0406289e 1058 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1059 if (zfcp_fsf_req_sbal_get(adapter))
1060 goto out;
1da177e4 1061
c41f8cbd
SS		 1062 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1063 ZFCP_REQ_AUTO_CLEANUP, pool);
025270f0 1064 if (IS_ERR(req)) {
c41f8cbd
SS		 1065 ret = PTR_ERR(req);
1066 goto out;
3f0ca62a
CS		 1067 }
1068
39eb7e9a
CS		 1069 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1070 FSF_MAX_SBALS_PER_REQ);
553448f6 1071 if (ret)
1da177e4 1072 goto failed_send;
1da177e4 1073
c41f8cbd 1074 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1075 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1076 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1077 req->qtcb->bottom.support.timeout = ct->timeout;
1078 req->data = ct;
1079
1080 zfcp_san_dbf_event_ct_request(req);
1081
1082 if (erp_action) {
1083 erp_action->fsf_req = req;
1084 req->erp_action = erp_action;
287ac01a 1085 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 1086 } else
1087 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1088
c41f8cbd
SS		 1089 ret = zfcp_fsf_req_send(req);
1090 if (ret)
1091 goto failed_send;
1da177e4 1092
c41f8cbd 1093 goto out;
1da177e4 1094
c41f8cbd
SS		 1095failed_send:
1096 zfcp_fsf_req_free(req);
1097 if (erp_action)
1098 erp_action->fsf_req = NULL;
1099out:
0406289e 1100 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1101 return ret;
1da177e4
LT		 1102}
1103
c41f8cbd 1104static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1105{
c41f8cbd
SS		 1106 struct zfcp_send_els *send_els = req->data;
1107 struct zfcp_port *port = send_els->port;
1108 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1109
c41f8cbd 1110 send_els->status = -EINVAL;
1da177e4 1111
c41f8cbd 1112 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1113 goto skip_fsfstatus;
1114
1115 switch (header->fsf_status) {
1da177e4 1116 case FSF_GOOD:
c41f8cbd
SS		 1117 zfcp_san_dbf_event_els_response(req);
1118 send_els->status = 0;
1da177e4 1119 break;
1da177e4 1120 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1121 zfcp_fsf_class_not_supp(req);
1da177e4 1122 break;
1da177e4 1123 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1124 switch (header->fsf_status_qual.word[0]){
1125 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1126 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1127 zfcp_test_link(port);
c41f8cbd 1128 /*fall through */
1da177e4 1129 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1130 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1131 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1132 break;
1da177e4
LT		 1133 }
1134 break;
1da177e4 1135 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1136 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1137 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1138 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1139 break;
1da177e4 1140 case FSF_ACCESS_DENIED:
c41f8cbd 1141 zfcp_fsf_access_denied_port(req, port);
1da177e4 1142 break;
c41f8cbd
SS		 1143 case FSF_SBAL_MISMATCH:
1144 /* should never occure, avoided in zfcp_fsf_send_els */
1145 /* fall through */
1da177e4 1146 default:
c41f8cbd 1147 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1148 break;
1149 }
1da177e4 1150skip_fsfstatus:
aa551daf 1151 if (send_els->handler)
1da177e4 1152 send_els->handler(send_els->handler_data);
c41f8cbd 1153}
1da177e4 1154
c41f8cbd
SS		 1155/**
1156 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1157 * @els: pointer to struct zfcp_send_els with data for the command
1158 */
1159int zfcp_fsf_send_els(struct zfcp_send_els *els)
1160{
1161 struct zfcp_fsf_req *req;
1162 struct zfcp_adapter *adapter = els->adapter;
1163 struct fsf_qtcb_bottom_support *bottom;
1164 int ret = -EIO;
1165
8fdf30d5
CS		 1166 spin_lock_bh(&adapter->req_q_lock);
1167 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1168 goto out;
1169 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1170 ZFCP_REQ_AUTO_CLEANUP, NULL);
025270f0 1171 if (IS_ERR(req)) {
c41f8cbd
SS		 1172 ret = PTR_ERR(req);
1173 goto out;
1174 }
1175
39eb7e9a 1176 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
44cc76f2 1177
c41f8cbd
SS		 1178 if (ret)
1179 goto failed_send;
1180
1181 bottom = &req->qtcb->bottom.support;
1182 req->handler = zfcp_fsf_send_els_handler;
1183 bottom->d_id = els->d_id;
1184 bottom->service_class = FSF_CLASS_3;
1185 bottom->timeout = 2 * R_A_TOV;
1186 req->data = els;
1187
1188 zfcp_san_dbf_event_els_request(req);
1189
1190 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1191 ret = zfcp_fsf_req_send(req);
1192 if (ret)
1193 goto failed_send;
1194
1195 goto out;
1196
1197failed_send:
1198 zfcp_fsf_req_free(req);
1199out:
8fdf30d5 1200 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1201 return ret;
1da177e4
LT		 1202}
1203
c41f8cbd 1204int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1205{
44cc76f2 1206 struct qdio_buffer_element *sbale;
c41f8cbd 1207 struct zfcp_fsf_req *req;
52ef11a7 1208 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd
SS		 1209 int retval = -EIO;
1210
0406289e 1211 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1212 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1213 goto out;
1214 req = zfcp_fsf_req_create(adapter,
1215 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1216 ZFCP_REQ_AUTO_CLEANUP,
1217 adapter->pool.fsf_req_erp);
025270f0 1218 if (IS_ERR(req)) {
c41f8cbd
SS		 1219 retval = PTR_ERR(req);
1220 goto out;
1da177e4
LT		 1221 }
1222
c41f8cbd 1223 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1224 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1225 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1226
c41f8cbd 1227 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1228 FSF_FEATURE_CFDC |
1229 FSF_FEATURE_LUN_SHARING |
9eb69aff 1230 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1231 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1232 req->erp_action = erp_action;
1233 req->handler = zfcp_fsf_exchange_config_data_handler;
1234 erp_action->fsf_req = req;
1da177e4 1235
287ac01a 1236 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1237 retval = zfcp_fsf_req_send(req);
1da177e4 1238 if (retval) {
c41f8cbd 1239 zfcp_fsf_req_free(req);
1da177e4 1240 erp_action->fsf_req = NULL;
1da177e4 1241 }
c41f8cbd 1242out:
0406289e 1243 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1244 return retval;
1245}
1da177e4 1246
c41f8cbd
SS		 1247int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1248 struct fsf_qtcb_bottom_config *data)
52ef11a7 1249{
44cc76f2 1250 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1251 struct zfcp_fsf_req *req = NULL;
1252 int retval = -EIO;
1253
0406289e 1254 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1255 if (zfcp_fsf_req_sbal_get(adapter))
1256 goto out;
1257
1258 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1259 0, NULL);
025270f0 1260 if (IS_ERR(req)) {
c41f8cbd
SS		 1261 retval = PTR_ERR(req);
1262 goto out;
52ef11a7
SS		 1263 }
1264
c41f8cbd 1265 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1266 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1267 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1268 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1269
c41f8cbd 1270 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1271 FSF_FEATURE_CFDC |
1272 FSF_FEATURE_LUN_SHARING |
1273 FSF_FEATURE_NOTIFICATION_LOST |
1274 FSF_FEATURE_UPDATE_ALERT;
1275
1276 if (data)
c41f8cbd 1277 req->data = data;
52ef11a7 1278
c41f8cbd
SS		 1279 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1280 retval = zfcp_fsf_req_send(req);
1281out:
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);
52ef11a7 1288
1da177e4
LT		 1289 return retval;
1290}
1291
1da177e4
LT		 1292/**
1293 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1294 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1295 * Returns: 0 on success, error otherwise
1da177e4 1296 */
c41f8cbd 1297int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1298{
44cc76f2 1299 struct qdio_buffer_element *sbale;
c41f8cbd 1300 struct zfcp_fsf_req *req;
52ef11a7 1301 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd 1302 int retval = -EIO;
1da177e4 1303
553448f6 1304 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1305 return -EOPNOTSUPP;
1da177e4 1306
0406289e 1307 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1308 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1309 goto out;
1310 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1311 ZFCP_REQ_AUTO_CLEANUP,
1312 adapter->pool.fsf_req_erp);
025270f0 1313 if (IS_ERR(req)) {
c41f8cbd
SS		 1314 retval = PTR_ERR(req);
1315 goto out;
aef4a983
MS		 1316 }
1317
c41f8cbd 1318 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1319 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1320 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1321
c41f8cbd
SS		 1322 req->handler = zfcp_fsf_exchange_port_data_handler;
1323 req->erp_action = erp_action;
1324 erp_action->fsf_req = req;
52ef11a7 1325
287ac01a 1326 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1327 retval = zfcp_fsf_req_send(req);
1da177e4 1328 if (retval) {
c41f8cbd 1329 zfcp_fsf_req_free(req);
52ef11a7
SS		 1330 erp_action->fsf_req = NULL;
1331 }
c41f8cbd 1332out:
0406289e 1333 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1334 return retval;
1335}
1336
52ef11a7
SS		 1337/**
1338 * zfcp_fsf_exchange_port_data_sync - request information about local port
c41f8cbd
SS		 1339 * @adapter: pointer to struct zfcp_adapter
1340 * @data: pointer to struct fsf_qtcb_bottom_port
1341 * Returns: 0 on success, error otherwise
52ef11a7 1342 */
c41f8cbd
SS		 1343int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1344 struct fsf_qtcb_bottom_port *data)
52ef11a7 1345{
44cc76f2 1346 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1347 struct zfcp_fsf_req *req = NULL;
1348 int retval = -EIO;
52ef11a7 1349
553448f6 1350 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1351 return -EOPNOTSUPP;
52ef11a7 1352
0406289e 1353 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1354 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1355 goto out;
1356
1357 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1358 NULL);
025270f0 1359 if (IS_ERR(req)) {
c41f8cbd
SS		 1360 retval = PTR_ERR(req);
1361 goto out;
1da177e4
LT		 1362 }
1363
52ef11a7 1364 if (data)
c41f8cbd 1365 req->data = data;
52ef11a7 1366
c41f8cbd 1367 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1368 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1369 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1370
c41f8cbd
SS		 1371 req->handler = zfcp_fsf_exchange_port_data_handler;
1372 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1373 retval = zfcp_fsf_req_send(req);
1374out:
0406289e 1375 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1376 if (!retval)
c41f8cbd
SS		 1377 wait_event(req->completion_wq,
1378 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1379 zfcp_fsf_req_free(req);
1da177e4 1380
1da177e4
LT		 1381 return retval;
1382}
1383
c41f8cbd 1384static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1385{
c41f8cbd
SS		 1386 struct zfcp_port *port = req->data;
1387 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1388 struct fsf_plogi *plogi;
1da177e4 1389
c41f8cbd 1390 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1391 return;
1da177e4 1392
1da177e4 1393 switch (header->fsf_status) {
1da177e4 1394 case FSF_PORT_ALREADY_OPEN:
1da177e4 1395 break;
1da177e4 1396 case FSF_ACCESS_DENIED:
c41f8cbd 1397 zfcp_fsf_access_denied_port(req, port);
1da177e4 1398 break;
1da177e4 1399 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1400 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1401 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1402 "remote port 0x%016Lx\n",
1403 (unsigned long long)port->wwpn);
5ffd51a5 1404 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1405 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1406 break;
1da177e4 1407 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1408 switch (header->fsf_status_qual.word[0]) {
1409 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1410 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1411 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1412 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1413 break;
1414 }
1415 break;
1da177e4 1416 case FSF_GOOD:
1da177e4 1417 port->handle = header->port_handle;
1da177e4
LT		 1418 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1419 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1420 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1421 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1422 &port->status);
1da177e4
LT		 1423 /* check whether D_ID has changed during open */
1424 /*
1425 * FIXME: This check is not airtight, as the FCP channel does
1426 * not monitor closures of target port connections caused on
1427 * the remote side. Thus, they might miss out on invalidating
1428 * locally cached WWPNs (and other N_Port parameters) of gone
1429 * target ports. So, our heroic attempt to make things safe
1430 * could be undermined by 'open port' response data tagged with
1431 * obsolete WWPNs. Another reason to monitor potential
1432 * connection closures ourself at least (by interpreting
1433 * incoming ELS' and unsolicited status). It just crosses my
1434 * mind that one should be able to cross-check by means of
1435 * another GID_PN straight after a port has been opened.
1436 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1437 */
c41f8cbd 1438 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1439 if (req->qtcb->bottom.support.els1_length >=
1440 FSF_PLOGI_MIN_LEN) {
c41f8cbd 1441 if (plogi->serv_param.wwpn != port->wwpn)
b98478d7 1442 port->d_id = 0;
c41f8cbd
SS		 1443 else {
1444 port->wwnn = plogi->serv_param.wwnn;
1445 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1446 }
1447 }
1448 break;
1da177e4 1449 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1450 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1451 break;
1452 }
1da177e4
LT		 1453}
1454
c41f8cbd
SS		 1455/**
1456 * zfcp_fsf_open_port - create and send open port request
1457 * @erp_action: pointer to struct zfcp_erp_action
1458 * Returns: 0 on success, error otherwise
1da177e4 1459 */
c41f8cbd 1460int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1461{
44cc76f2 1462 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1463 struct zfcp_adapter *adapter = erp_action->adapter;
1464 struct zfcp_fsf_req *req;
1465 int retval = -EIO;
1466
0406289e 1467 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1468 if (zfcp_fsf_req_sbal_get(adapter))
1469 goto out;
1470
1471 req = zfcp_fsf_req_create(adapter,
1472 FSF_QTCB_OPEN_PORT_WITH_DID,
1473 ZFCP_REQ_AUTO_CLEANUP,
1474 adapter->pool.fsf_req_erp);
025270f0 1475 if (IS_ERR(req)) {
c41f8cbd 1476 retval = PTR_ERR(req);
1da177e4 1477 goto out;
c41f8cbd 1478 }
1da177e4 1479
c41f8cbd 1480 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1481 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1482 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1483
c41f8cbd
SS		 1484 req->handler = zfcp_fsf_open_port_handler;
1485 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1486 req->data = erp_action->port;
1487 req->erp_action = erp_action;
1488 erp_action->fsf_req = req;
c41f8cbd 1489
287ac01a 1490 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1491 retval = zfcp_fsf_req_send(req);
1da177e4 1492 if (retval) {
c41f8cbd 1493 zfcp_fsf_req_free(req);
1da177e4 1494 erp_action->fsf_req = NULL;
1da177e4 1495 }
c41f8cbd 1496out:
0406289e 1497 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1498 return retval;
1499}
1500
c41f8cbd 1501static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1502{
c41f8cbd 1503 struct zfcp_port *port = req->data;
1da177e4 1504
c41f8cbd 1505 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1506 return;
1da177e4 1507
c41f8cbd 1508 switch (req->qtcb->header.fsf_status) {
1da177e4 1509 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1510 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1511 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1512 break;
1da177e4 1513 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1514 break;
1da177e4 1515 case FSF_GOOD:
5ffd51a5 1516 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1517 ZFCP_STATUS_COMMON_OPEN,
1518 ZFCP_CLEAR);
1da177e4 1519 break;
1da177e4 1520 }
1da177e4
LT		 1521}
1522
c41f8cbd
SS		 1523/**
1524 * zfcp_fsf_close_port - create and send close port request
1525 * @erp_action: pointer to struct zfcp_erp_action
1526 * Returns: 0 on success, error otherwise
1da177e4 1527 */
c41f8cbd 1528int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1529{
44cc76f2 1530 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1531 struct zfcp_adapter *adapter = erp_action->adapter;
1532 struct zfcp_fsf_req *req;
1533 int retval = -EIO;
1534
0406289e 1535 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1536 if (zfcp_fsf_req_sbal_get(adapter))
1537 goto out;
1538
1539 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1540 ZFCP_REQ_AUTO_CLEANUP,
1541 adapter->pool.fsf_req_erp);
025270f0 1542 if (IS_ERR(req)) {
c41f8cbd 1543 retval = PTR_ERR(req);
1da177e4 1544 goto out;
c41f8cbd 1545 }
1da177e4 1546
c41f8cbd 1547 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1548 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1549 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1550
c41f8cbd
SS		 1551 req->handler = zfcp_fsf_close_port_handler;
1552 req->data = erp_action->port;
1553 req->erp_action = erp_action;
1554 req->qtcb->header.port_handle = erp_action->port->handle;
1555 erp_action->fsf_req = req;
c41f8cbd 1556
287ac01a 1557 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1558 retval = zfcp_fsf_req_send(req);
1da177e4 1559 if (retval) {
c41f8cbd 1560 zfcp_fsf_req_free(req);
1da177e4 1561 erp_action->fsf_req = NULL;
1da177e4 1562 }
c41f8cbd 1563out:
0406289e 1564 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1565 return retval;
1566}
1567
5ab944f9
SS		 1568static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1569{
1570 struct zfcp_wka_port *wka_port = req->data;
1571 struct fsf_qtcb_header *header = &req->qtcb->header;
1572
1573 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1574 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1575 goto out;
1576 }
1577
1578 switch (header->fsf_status) {
1579 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1580 dev_warn(&req->adapter->ccw_device->dev,
1581 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1582 case FSF_ADAPTER_STATUS_AVAILABLE:
1583 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1584 case FSF_ACCESS_DENIED:
1585 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1586 break;
1587 case FSF_PORT_ALREADY_OPEN:
1c1cba17 1588 break;
5ab944f9
SS		 1589 case FSF_GOOD:
1590 wka_port->handle = header->port_handle;
1591 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1592 }
1593out:
1594 wake_up(&wka_port->completion_wq);
1595}
1596
1597/**
1598 * zfcp_fsf_open_wka_port - create and send open wka-port request
1599 * @wka_port: pointer to struct zfcp_wka_port
1600 * Returns: 0 on success, error otherwise
1601 */
1602int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1603{
1604 struct qdio_buffer_element *sbale;
1605 struct zfcp_adapter *adapter = wka_port->adapter;
1606 struct zfcp_fsf_req *req;
1607 int retval = -EIO;
1608
0406289e 1609 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1610 if (zfcp_fsf_req_sbal_get(adapter))
1611 goto out;
1612
1613 req = zfcp_fsf_req_create(adapter,
1614 FSF_QTCB_OPEN_PORT_WITH_DID,
1615 ZFCP_REQ_AUTO_CLEANUP,
1616 adapter->pool.fsf_req_erp);
1617 if (unlikely(IS_ERR(req))) {
1618 retval = PTR_ERR(req);
1619 goto out;
1620 }
1621
1622 sbale = zfcp_qdio_sbale_req(req);
1623 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1624 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1625
1626 req->handler = zfcp_fsf_open_wka_port_handler;
1627 req->qtcb->bottom.support.d_id = wka_port->d_id;
1628 req->data = wka_port;
1629
1630 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1631 retval = zfcp_fsf_req_send(req);
1632 if (retval)
1633 zfcp_fsf_req_free(req);
1634out:
0406289e 1635 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1636 return retval;
1637}
1638
1639static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1640{
1641 struct zfcp_wka_port *wka_port = req->data;
1642
1643 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1644 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1645 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1646 }
1647
1648 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1649 wake_up(&wka_port->completion_wq);
1650}
1651
1652/**
1653 * zfcp_fsf_close_wka_port - create and send close wka port request
1654 * @erp_action: pointer to struct zfcp_erp_action
1655 * Returns: 0 on success, error otherwise
1656 */
1657int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1658{
1659 struct qdio_buffer_element *sbale;
1660 struct zfcp_adapter *adapter = wka_port->adapter;
1661 struct zfcp_fsf_req *req;
1662 int retval = -EIO;
1663
0406289e 1664 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1665 if (zfcp_fsf_req_sbal_get(adapter))
1666 goto out;
1667
1668 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1669 ZFCP_REQ_AUTO_CLEANUP,
1670 adapter->pool.fsf_req_erp);
1671 if (unlikely(IS_ERR(req))) {
1672 retval = PTR_ERR(req);
1673 goto out;
1674 }
1675
1676 sbale = zfcp_qdio_sbale_req(req);
1677 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1678 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1679
1680 req->handler = zfcp_fsf_close_wka_port_handler;
1681 req->data = wka_port;
1682 req->qtcb->header.port_handle = wka_port->handle;
1683
1684 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1685 retval = zfcp_fsf_req_send(req);
1686 if (retval)
1687 zfcp_fsf_req_free(req);
1688out:
0406289e 1689 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1690 return retval;
1691}
1692
c41f8cbd 1693static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1694{
c41f8cbd
SS		 1695 struct zfcp_port *port = req->data;
1696 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1697 struct zfcp_unit *unit;
1da177e4 1698
c41f8cbd 1699 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1700 return;
1da177e4 1701
1da177e4 1702 switch (header->fsf_status) {
1da177e4 1703 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1704 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1705 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1706 break;
1da177e4 1707 case FSF_ACCESS_DENIED:
c41f8cbd 1708 zfcp_fsf_access_denied_port(req, port);
1da177e4 1709 break;
1da177e4 1710 case FSF_PORT_BOXED:
5ffd51a5 1711 zfcp_erp_port_boxed(port, "fscpph2", req);
c41f8cbd
SS		 1712 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1713 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 1714 /* can't use generic zfcp_erp_modify_port_status because
1715 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1716 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1717 list_for_each_entry(unit, &port->unit_list_head, list)
1718 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1719 &unit->status);
1da177e4 1720 break;
1da177e4 1721 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1722 switch (header->fsf_status_qual.word[0]) {
1723 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1724 /* fall through */
1da177e4 1725 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1726 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1727 break;
1da177e4
LT		 1728 }
1729 break;
1da177e4 1730 case FSF_GOOD:
1da177e4
LT		 1731 /* can't use generic zfcp_erp_modify_port_status because
1732 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1733 */
1734 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1735 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1736 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1737 &unit->status);
1da177e4 1738 break;
1da177e4 1739 }
1da177e4
LT		 1740}
1741
c41f8cbd
SS		 1742/**
1743 * zfcp_fsf_close_physical_port - close physical port
1744 * @erp_action: pointer to struct zfcp_erp_action
1745 * Returns: 0 on success
1da177e4 1746 */
c41f8cbd 1747int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1748{
44cc76f2 1749 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1750 struct zfcp_adapter *adapter = erp_action->adapter;
1751 struct zfcp_fsf_req *req;
1752 int retval = -EIO;
1753
0406289e 1754 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1755 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1756 goto out;
1da177e4 1757
c41f8cbd
SS		 1758 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1759 ZFCP_REQ_AUTO_CLEANUP,
1760 adapter->pool.fsf_req_erp);
025270f0 1761 if (IS_ERR(req)) {
c41f8cbd
SS		 1762 retval = PTR_ERR(req);
1763 goto out;
1764 }
1da177e4 1765
c41f8cbd
SS		 1766 sbale = zfcp_qdio_sbale_req(req);
1767 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1768 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1769
c41f8cbd
SS		 1770 req->data = erp_action->port;
1771 req->qtcb->header.port_handle = erp_action->port->handle;
1772 req->erp_action = erp_action;
1773 req->handler = zfcp_fsf_close_physical_port_handler;
1774 erp_action->fsf_req = req;
c41f8cbd 1775
287ac01a 1776 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1777 retval = zfcp_fsf_req_send(req);
1da177e4 1778 if (retval) {
c41f8cbd 1779 zfcp_fsf_req_free(req);
1da177e4 1780 erp_action->fsf_req = NULL;
1da177e4 1781 }
c41f8cbd 1782out:
0406289e 1783 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1784 return retval;
1785}
1786
c41f8cbd 1787static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1788{
c41f8cbd
SS		 1789 struct zfcp_adapter *adapter = req->adapter;
1790 struct zfcp_unit *unit = req->data;
1791 struct fsf_qtcb_header *header = &req->qtcb->header;
1792 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1793 struct fsf_queue_designator *queue_designator =
1794 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1795 int exclusive, readwrite;
1da177e4 1796
c41f8cbd 1797 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1798 return;
1da177e4 1799
1da177e4 1800 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1801 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1802 ZFCP_STATUS_UNIT_SHARED |
1803 ZFCP_STATUS_UNIT_READONLY,
1804 &unit->status);
1805
1da177e4
LT		 1806 switch (header->fsf_status) {
1807
1808 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1809 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1810 /* fall through */
1da177e4 1811 case FSF_LUN_ALREADY_OPEN:
1da177e4 1812 break;
1da177e4 1813 case FSF_ACCESS_DENIED:
c41f8cbd 1814 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1815 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1816 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1817 break;
1da177e4 1818 case FSF_PORT_BOXED:
5ffd51a5 1819 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1820 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1821 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1822 break;
1da177e4 1823 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1824 if (header->fsf_status_qual.word[0])
553448f6 1825 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1826 "LUN 0x%Lx on port 0x%Lx is already in "
1827 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1828 (unsigned long long)unit->fcp_lun,
1829 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1830 queue_designator->cssid,
1831 queue_designator->hla);
c41f8cbd 1832 else
553448f6
CS		 1833 zfcp_act_eval_err(adapter,
1834 header->fsf_status_qual.word[2]);
5ffd51a5 1835 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1836 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1837 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1838 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1839 break;
1da177e4 1840 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1841 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1842 "No handle is available for LUN "
1843 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1844 (unsigned long long)unit->fcp_lun,
1845 (unsigned long long)unit->port->wwpn);
5ffd51a5 1846 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1847 /* fall through */
1848 case FSF_INVALID_COMMAND_OPTION:
1849 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1850 break;
1da177e4 1851 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1852 switch (header->fsf_status_qual.word[0]) {
1853 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1854 zfcp_test_link(unit->port);
c41f8cbd 1855 /* fall through */
1da177e4 1856 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1857 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1858 break;
1da177e4
LT		 1859 }
1860 break;
1861
1da177e4 1862 case FSF_GOOD:
1da177e4 1863 unit->handle = header->lun_handle;
1da177e4 1864 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1865
1866 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1867 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1868 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1869 exclusive = (bottom->lun_access_info &
1870 FSF_UNIT_ACCESS_EXCLUSIVE);
1871 readwrite = (bottom->lun_access_info &
1872 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1873
1da177e4
LT		 1874 if (!exclusive)
1875 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1876 &unit->status);
1877
1878 if (!readwrite) {
1879 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1880 &unit->status);
c41f8cbd 1881 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1882 "SCSI device at LUN 0x%016Lx on port "
1883 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1884 (unsigned long long)unit->fcp_lun,
1885 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1886 }
1887
1888 if (exclusive && !readwrite) {
c41f8cbd 1889 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1890 "Exclusive read-only access not "
1891 "supported (unit 0x%016Lx, "
1892 "port 0x%016Lx)\n",
7ba58c9c
SS		 1893 (unsigned long long)unit->fcp_lun,
1894 (unsigned long long)unit->port->wwpn);
5ffd51a5 1895 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1896 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1897 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1898 } else if (!exclusive && readwrite) {
c41f8cbd 1899 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1900 "Shared read-write access not "
1901 "supported (unit 0x%016Lx, port "
27c3f0a6 1902 "0x%016Lx)\n",
7ba58c9c
SS		 1903 (unsigned long long)unit->fcp_lun,
1904 (unsigned long long)unit->port->wwpn);
5ffd51a5 1905 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1906 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1907 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1908 }
1909 }
1da177e4 1910 break;
1da177e4 1911 }
1da177e4
LT		 1912}
1913
c41f8cbd
SS		 1914/**
1915 * zfcp_fsf_open_unit - open unit
1916 * @erp_action: pointer to struct zfcp_erp_action
1917 * Returns: 0 on success, error otherwise
1da177e4 1918 */
c41f8cbd 1919int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1920{
44cc76f2 1921 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1922 struct zfcp_adapter *adapter = erp_action->adapter;
1923 struct zfcp_fsf_req *req;
1924 int retval = -EIO;
1925
0406289e 1926 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1927 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1928 goto out;
1da177e4 1929
c41f8cbd
SS		 1930 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1931 ZFCP_REQ_AUTO_CLEANUP,
1932 adapter->pool.fsf_req_erp);
025270f0 1933 if (IS_ERR(req)) {
c41f8cbd
SS		 1934 retval = PTR_ERR(req);
1935 goto out;
1936 }
1937
1938 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1939 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1940 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1941
c41f8cbd
SS		 1942 req->qtcb->header.port_handle = erp_action->port->handle;
1943 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1944 req->handler = zfcp_fsf_open_unit_handler;
1945 req->data = erp_action->unit;
1946 req->erp_action = erp_action;
1947 erp_action->fsf_req = req;
1948
1949 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1950 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1951
287ac01a 1952 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1953 retval = zfcp_fsf_req_send(req);
1da177e4 1954 if (retval) {
c41f8cbd 1955 zfcp_fsf_req_free(req);
1da177e4 1956 erp_action->fsf_req = NULL;
1da177e4 1957 }
c41f8cbd 1958out:
0406289e 1959 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1960 return retval;
1961}
1962
c41f8cbd 1963static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1964{
c41f8cbd 1965 struct zfcp_unit *unit = req->data;
1da177e4 1966
c41f8cbd 1967 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1968 return;
1da177e4 1969
c41f8cbd 1970 switch (req->qtcb->header.fsf_status) {
1da177e4 1971 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1972 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 1973 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1974 break;
1da177e4 1975 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 1976 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 1977 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1978 break;
1da177e4 1979 case FSF_PORT_BOXED:
5ffd51a5 1980 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 1981 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1982 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1983 break;
1da177e4 1984 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 1985 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 1986 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1987 zfcp_test_link(unit->port);
c41f8cbd 1988 /* fall through */
1da177e4 1989 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1990 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1991 break;
1992 }
1993 break;
1da177e4 1994 case FSF_GOOD:
1da177e4 1995 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 1996 break;
1da177e4 1997 }
1da177e4
LT		 1998}
1999
2000/**
c41f8cbd
SS		 2001 * zfcp_fsf_close_unit - close zfcp unit
2002 * @erp_action: pointer to struct zfcp_unit
2003 * Returns: 0 on success, error otherwise
1da177e4 2004 */
c41f8cbd 2005int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2006{
44cc76f2 2007 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2008 struct zfcp_adapter *adapter = erp_action->adapter;
2009 struct zfcp_fsf_req *req;
2010 int retval = -EIO;
1da177e4 2011
0406289e 2012 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 2013 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 2014 goto out;
c41f8cbd
SS		 2015 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2016 ZFCP_REQ_AUTO_CLEANUP,
2017 adapter->pool.fsf_req_erp);
025270f0 2018 if (IS_ERR(req)) {
c41f8cbd
SS		 2019 retval = PTR_ERR(req);
2020 goto out;
2021 }
1da177e4 2022
c41f8cbd
SS		 2023 sbale = zfcp_qdio_sbale_req(req);
2024 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2025 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2026
c41f8cbd
SS		 2027 req->qtcb->header.port_handle = erp_action->port->handle;
2028 req->qtcb->header.lun_handle = erp_action->unit->handle;
2029 req->handler = zfcp_fsf_close_unit_handler;
2030 req->data = erp_action->unit;
2031 req->erp_action = erp_action;
2032 erp_action->fsf_req = req;
fdf23452 2033
287ac01a 2034 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2035 retval = zfcp_fsf_req_send(req);
2036 if (retval) {
2037 zfcp_fsf_req_free(req);
2038 erp_action->fsf_req = NULL;
2039 }
2040out:
0406289e 2041 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 2042 return retval;
1da177e4
LT		 2043}
2044
c9615858
CS		 2045static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2046{
2047 lat_rec->sum += lat;
c41f8cbd
SS		 2048 lat_rec->min = min(lat_rec->min, lat);
2049 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2050}
2051
c41f8cbd 2052static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2053{
2054 struct fsf_qual_latency_info *lat_inf;
2055 struct latency_cont *lat;
c41f8cbd 2056 struct zfcp_unit *unit = req->unit;
c9615858 2057
c41f8cbd 2058 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2059
c41f8cbd 2060 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2061 case FSF_DATADIR_READ:
2062 lat = &unit->latencies.read;
2063 break;
2064 case FSF_DATADIR_WRITE:
2065 lat = &unit->latencies.write;
2066 break;
2067 case FSF_DATADIR_CMND:
2068 lat = &unit->latencies.cmd;
2069 break;
2070 default:
2071 return;
2072 }
2073
49f0f01c 2074 spin_lock(&unit->latencies.lock);
c9615858
CS		 2075 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2076 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2077 lat->counter++;
49f0f01c 2078 spin_unlock(&unit->latencies.lock);
1da177e4
LT		 2079}
2080
0997f1c5
SR		 2081#ifdef CONFIG_BLK_DEV_IO_TRACE
2082static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2083{
2084 struct fsf_qual_latency_info *lat_inf;
2085 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2086 struct request *req = scsi_cmnd->request;
2087 struct zfcp_blk_drv_data trace;
2088 int ticks = fsf_req->adapter->timer_ticks;
2089
2090 trace.flags = 0;
2091 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2092 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2093 trace.flags |= ZFCP_BLK_LAT_VALID;
2094 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2095 trace.channel_lat = lat_inf->channel_lat * ticks;
2096 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2097 }
2098 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2099 trace.flags |= ZFCP_BLK_REQ_ERROR;
2100 trace.inb_usage = fsf_req->qdio_inb_usage;
2101 trace.outb_usage = fsf_req->qdio_outb_usage;
2102
2103 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2104}
2105#else
2106static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2107{
2108}
2109#endif
2110
c41f8cbd 2111static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2112{
0ac55aa9 2113 struct scsi_cmnd *scpnt;
1da177e4 2114 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2115 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2116 u32 sns_len;
f76af7d7 2117 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2118 unsigned long flags;
1da177e4 2119
c41f8cbd
SS		 2120 read_lock_irqsave(&req->adapter->abort_lock, flags);
2121
0ac55aa9
SS		 2122 scpnt = req->data;
2123 if (unlikely(!scpnt)) {
2124 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2125 return;
2126 }
2127
c41f8cbd 2128 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2129 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2130 goto skip_fsfstatus;
2131 }
2132
c41f8cbd 2133 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2134 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2135 goto skip_fsfstatus;
2136 }
2137
feac6a07 2138 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2139
1da177e4 2140 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2141
c41f8cbd
SS		 2142 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2143 zfcp_fsf_req_latency(req);
c9615858 2144
0997f1c5
SR		 2145 zfcp_fsf_trace_latency(req);
2146
1da177e4 2147 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2148 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2149 set_host_byte(scpnt, DID_OK);
c41f8cbd 2150 else {
feac6a07 2151 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2152 goto skip_fsfstatus;
1da177e4
LT		 2153 }
2154 }
2155
1da177e4 2156 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2157 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2158 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2159 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2160 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2161
9d058ecf 2162 memcpy(scpnt->sense_buffer,
1da177e4 2163 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2164 }
2165
1da177e4 2166 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2167 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2168 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2169 scpnt->underflow)
feac6a07 2170 set_host_byte(scpnt, DID_ERROR);
1da177e4 2171 }
c41f8cbd 2172skip_fsfstatus:
8a36e453 2173 if (scpnt->result != 0)
c41f8cbd 2174 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
8a36e453 2175 else if (scpnt->retries > 0)
c41f8cbd 2176 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
8a36e453 2177 else
c41f8cbd 2178 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
1da177e4 2179
1da177e4 2180 scpnt->host_scribble = NULL;
1da177e4 2181 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2182 /*
2183 * We must hold this lock until scsi_done has been called.
2184 * Otherwise we may call scsi_done after abort regarding this
2185 * command has completed.
2186 * Note: scsi_done must not block!
2187 */
c41f8cbd 2188 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2189}
2190
c41f8cbd 2191static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2192{
1da177e4 2193 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2194 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2195 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2196
c41f8cbd
SS		 2197 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2198 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2199 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2200}
2201
2202
2203static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2204{
2205 struct zfcp_unit *unit;
2206 struct fsf_qtcb_header *header = &req->qtcb->header;
2207
2208 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2209 unit = req->data;
2210 else
2211 unit = req->unit;
2212
2213 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2214 goto skip_fsfstatus;
1da177e4 2215
c41f8cbd
SS		 2216 switch (header->fsf_status) {
2217 case FSF_HANDLE_MISMATCH:
2218 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2219 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2220 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2221 break;
2222 case FSF_FCPLUN_NOT_VALID:
2223 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2224 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2225 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2226 break;
c41f8cbd
SS		 2227 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2228 zfcp_fsf_class_not_supp(req);
1da177e4 2229 break;
c41f8cbd
SS		 2230 case FSF_ACCESS_DENIED:
2231 zfcp_fsf_access_denied_unit(req, unit);
2232 break;
2233 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2234 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2235 "Incorrect direction %d, unit 0x%016Lx on port "
2236 "0x%016Lx closed\n",
c41f8cbd 2237 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2238 (unsigned long long)unit->fcp_lun,
2239 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2240 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2241 req);
c41f8cbd
SS		 2242 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2243 break;
2244 case FSF_CMND_LENGTH_NOT_VALID:
2245 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2246 "Incorrect CDB length %d, unit 0x%016Lx on "
2247 "port 0x%016Lx closed\n",
c41f8cbd 2248 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2249 (unsigned long long)unit->fcp_lun,
2250 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2251 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2252 req);
c41f8cbd
SS		 2253 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2254 break;
2255 case FSF_PORT_BOXED:
5ffd51a5 2256 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2257 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2258 ZFCP_STATUS_FSFREQ_RETRY;
2259 break;
2260 case FSF_LUN_BOXED:
5ffd51a5 2261 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2262 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2263 ZFCP_STATUS_FSFREQ_RETRY;
2264 break;
2265 case FSF_ADAPTER_STATUS_AVAILABLE:
2266 if (header->fsf_status_qual.word[0] ==
2267 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2268 zfcp_test_link(unit->port);
2269 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2270 break;
1da177e4 2271 }
c41f8cbd
SS		 2272skip_fsfstatus:
2273 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2274 zfcp_fsf_send_fcp_ctm_handler(req);
2275 else {
2276 zfcp_fsf_send_fcp_command_task_handler(req);
2277 req->unit = NULL;
2278 zfcp_unit_put(unit);
2279 }
1da177e4
LT		 2280}
2281
7ba58c9c
SS		 2282static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2283{
2284 u32 *fcp_dl_ptr;
2285
2286 /*
2287 * fcp_dl_addr = start address of fcp_cmnd structure +
2288 * size of fixed part + size of dynamically sized add_dcp_cdb field
2289 * SEE FCP-2 documentation
2290 */
2291 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2292 (fcp_cmd->add_fcp_cdb_length << 2));
2293 *fcp_dl_ptr = fcp_dl;
2294}
2295
c41f8cbd
SS		 2296/**
2297 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2298 * @unit: unit where command is sent to
2299 * @scsi_cmnd: scsi command to be sent
1da177e4 2300 */
63caf367
CS		 2301int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2302 struct scsi_cmnd *scsi_cmnd)
1da177e4 2303{
c41f8cbd
SS		 2304 struct zfcp_fsf_req *req;
2305 struct fcp_cmnd_iu *fcp_cmnd_iu;
2306 unsigned int sbtype;
2307 int real_bytes, retval = -EIO;
63caf367 2308 struct zfcp_adapter *adapter = unit->port->adapter;
1da177e4 2309
c41f8cbd
SS		 2310 if (unlikely(!(atomic_read(&unit->status) &
2311 ZFCP_STATUS_COMMON_UNBLOCKED)))
2312 return -EBUSY;
1da177e4 2313
0406289e 2314 spin_lock(&adapter->req_q_lock);
8fdf30d5
CS		 2315 if (atomic_read(&adapter->req_q.count) <= 0) {
2316 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd 2317 goto out;
8fdf30d5 2318 }
63caf367
CS		 2319 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2320 ZFCP_REQ_AUTO_CLEANUP,
c41f8cbd 2321 adapter->pool.fsf_req_scsi);
025270f0 2322 if (IS_ERR(req)) {
c41f8cbd
SS		 2323 retval = PTR_ERR(req);
2324 goto out;
2325 }
2326
2327 zfcp_unit_get(unit);
2328 req->unit = unit;
2329 req->data = scsi_cmnd;
2330 req->handler = zfcp_fsf_send_fcp_command_handler;
2331 req->qtcb->header.lun_handle = unit->handle;
2332 req->qtcb->header.port_handle = unit->port->handle;
2333 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2334
2335 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2336
2337 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2338 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2339 /*
2340 * set depending on data direction:
2341 * data direction bits in SBALE (SB Type)
2342 * data direction bits in QTCB
2343 * data direction bits in FCP_CMND IU
2344 */
2345 switch (scsi_cmnd->sc_data_direction) {
2346 case DMA_NONE:
2347 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2348 sbtype = SBAL_FLAGS0_TYPE_READ;
1da177e4 2349 break;
c41f8cbd
SS		 2350 case DMA_FROM_DEVICE:
2351 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2352 sbtype = SBAL_FLAGS0_TYPE_READ;
2353 fcp_cmnd_iu->rddata = 1;
2354 break;
2355 case DMA_TO_DEVICE:
2356 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2357 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2358 fcp_cmnd_iu->wddata = 1;
1da177e4 2359 break;
c41f8cbd 2360 case DMA_BIDIRECTIONAL:
1da177e4 2361 default:
c41f8cbd
SS		 2362 retval = -EIO;
2363 goto failed_scsi_cmnd;
1da177e4
LT		 2364 }
2365
c41f8cbd
SS		 2366 if (likely((scsi_cmnd->device->simple_tags) ||
2367 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2368 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2369 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2370 else
2371 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2372
c41f8cbd
SS		 2373 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2374 fcp_cmnd_iu->add_fcp_cdb_length =
2375 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2376
c41f8cbd 2377 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2378
c41f8cbd 2379 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2380 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2381
c41f8cbd
SS		 2382 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2383 scsi_sglist(scsi_cmnd),
2384 FSF_MAX_SBALS_PER_REQ);
2385 if (unlikely(real_bytes < 0)) {
2386 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2387 retval = -EIO;
2388 else {
2389 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2390 "Oversize data package, unit 0x%016Lx "
2391 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2392 (unsigned long long)unit->fcp_lun,
2393 (unsigned long long)unit->port->wwpn);
5ffd51a5 2394 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2395 retval = -EINVAL;
2396 }
2397 goto failed_scsi_cmnd;
1da177e4 2398 }
1da177e4 2399
c41f8cbd 2400 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2401
c41f8cbd
SS		 2402 retval = zfcp_fsf_req_send(req);
2403 if (unlikely(retval))
2404 goto failed_scsi_cmnd;
1da177e4 2405
c41f8cbd 2406 goto out;
1da177e4 2407
c41f8cbd
SS		 2408failed_scsi_cmnd:
2409 zfcp_unit_put(unit);
2410 zfcp_fsf_req_free(req);
2411 scsi_cmnd->host_scribble = NULL;
2412out:
0406289e 2413 spin_unlock(&adapter->req_q_lock);
c41f8cbd 2414 return retval;
1da177e4
LT		 2415}
2416
2417/**
c41f8cbd 2418 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2419 * @unit: pointer to struct zfcp_unit
2420 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2421 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2422 */
63caf367 2423struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2424{
44cc76f2 2425 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2426 struct zfcp_fsf_req *req = NULL;
2427 struct fcp_cmnd_iu *fcp_cmnd_iu;
63caf367 2428 struct zfcp_adapter *adapter = unit->port->adapter;
1da177e4 2429
c41f8cbd
SS		 2430 if (unlikely(!(atomic_read(&unit->status) &
2431 ZFCP_STATUS_COMMON_UNBLOCKED)))
2432 return NULL;
1da177e4 2433
92cab0d9
CS		 2434 spin_lock_bh(&adapter->req_q_lock);
2435 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd 2436 goto out;
63caf367 2437 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
c41f8cbd 2438 adapter->pool.fsf_req_scsi);
633528c3
SS		 2439 if (IS_ERR(req)) {
2440 req = NULL;
c41f8cbd 2441 goto out;
633528c3 2442 }
1da177e4 2443
c41f8cbd
SS		 2444 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2445 req->data = unit;
2446 req->handler = zfcp_fsf_send_fcp_command_handler;
2447 req->qtcb->header.lun_handle = unit->handle;
2448 req->qtcb->header.port_handle = unit->port->handle;
2449 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2450 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2451 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2452 sizeof(u32);
c41f8cbd
SS		 2453
2454 sbale = zfcp_qdio_sbale_req(req);
2455 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2456 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2457
c41f8cbd
SS		 2458 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2459 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2460 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2461
c41f8cbd
SS		 2462 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2463 if (!zfcp_fsf_req_send(req))
2464 goto out;
1da177e4 2465
c41f8cbd
SS		 2466 zfcp_fsf_req_free(req);
2467 req = NULL;
2468out:
92cab0d9 2469 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2470 return req;
2471}
1da177e4 2472
c41f8cbd
SS		 2473static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2474{
2475 if (req->qtcb->header.fsf_status != FSF_GOOD)
2476 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2477}
2478
c41f8cbd
SS		 2479/**
2480 * zfcp_fsf_control_file - control file upload/download
2481 * @adapter: pointer to struct zfcp_adapter
2482 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2483 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2484 */
c41f8cbd
SS		 2485struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2486 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2487{
44cc76f2 2488 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2489 struct zfcp_fsf_req *req = NULL;
2490 struct fsf_qtcb_bottom_support *bottom;
2491 int direction, retval = -EIO, bytes;
2492
2493 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2494 return ERR_PTR(-EOPNOTSUPP);
2495
2496 switch (fsf_cfdc->command) {
2497 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2498 direction = SBAL_FLAGS0_TYPE_WRITE;
2499 break;
2500 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2501 direction = SBAL_FLAGS0_TYPE_READ;
2502 break;
2503 default:
2504 return ERR_PTR(-EINVAL);
2505 }
1da177e4 2506
0406289e 2507 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2508 if (zfcp_fsf_req_sbal_get(adapter))
2509 goto out;
1da177e4 2510
c41f8cbd 2511 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
025270f0 2512 if (IS_ERR(req)) {
c41f8cbd
SS		 2513 retval = -EPERM;
2514 goto out;
2515 }
1da177e4 2516
c41f8cbd 2517 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2518
c41f8cbd
SS		 2519 sbale = zfcp_qdio_sbale_req(req);
2520 sbale[0].flags |= direction;
8a36e453 2521
c41f8cbd
SS		 2522 bottom = &req->qtcb->bottom.support;
2523 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2524 bottom->option = fsf_cfdc->option;
8a36e453 2525
c41f8cbd
SS		 2526 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2527 FSF_MAX_SBALS_PER_REQ);
2528 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2529 retval = -ENOMEM;
2530 zfcp_fsf_req_free(req);
2531 goto out;
2532 }
1da177e4 2533
c41f8cbd
SS		 2534 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2535 retval = zfcp_fsf_req_send(req);
2536out:
0406289e 2537 spin_unlock_bh(&adapter->req_q_lock);
8a36e453 2538
c41f8cbd
SS		 2539 if (!retval) {
2540 wait_event(req->completion_wq,
2541 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2542 return req;
1da177e4 2543 }
c41f8cbd 2544 return ERR_PTR(retval);
1da177e4 2545}
Linux kernel - Deliverables
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