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[SCSI] zfcp: register with SCSI layer on ccw registration
[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 *
553448f6 6 * Copyright IBM Corporation 2002, 2008
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
287ac01a
CS		 15static void zfcp_fsf_request_timeout_handler(unsigned long data)
16{
17 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
18 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
19 NULL);
20}
21
22static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
23 unsigned long timeout)
24{
25 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
26 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
27 fsf_req->timer.expires = jiffies + timeout;
28 add_timer(&fsf_req->timer);
29}
30
31static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
32{
33 BUG_ON(!fsf_req->erp_action);
34 fsf_req->timer.function = zfcp_erp_timeout_handler;
35 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
36 fsf_req->timer.expires = jiffies + 30 * HZ;
37 add_timer(&fsf_req->timer);
38}
39
1da177e4
LT		 40/* association between FSF command and FSF QTCB type */
41static u32 fsf_qtcb_type[] = {
42 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
43 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
44 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
52 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
53 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
55};
56
553448f6
CS		 57static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
58{
c41f8cbd 59 u16 subtable = table >> 16;
553448f6 60 u16 rule = table & 0xffff;
ff3b24fa 61 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
553448f6 62
ff3b24fa 63 if (subtable && subtable < ARRAY_SIZE(act_type))
553448f6 64 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 65 "Access denied according to ACT rule type %s, "
66 "rule %d\n", act_type[subtable], rule);
553448f6
CS		 67}
68
69static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
70 struct zfcp_port *port)
71{
72 struct fsf_qtcb_header *header = &req->qtcb->header;
73 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 74 "Access denied to port 0x%016Lx\n",
7ba58c9c 75 (unsigned long long)port->wwpn);
553448f6
CS		 76 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
77 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
78 zfcp_erp_port_access_denied(port, 55, req);
79 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
80}
81
82static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
83 struct zfcp_unit *unit)
84{
85 struct fsf_qtcb_header *header = &req->qtcb->header;
86 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 87 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 88 (unsigned long long)unit->fcp_lun,
89 (unsigned long long)unit->port->wwpn);
553448f6
CS		 90 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
91 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
92 zfcp_erp_unit_access_denied(unit, 59, req);
93 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
94}
95
96static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
97{
ff3b24fa
CS		 98 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
99 "operational because of an unsupported FC class\n");
553448f6
CS		 100 zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req);
101 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
102}
103
c41f8cbd
SS		 104/**
105 * zfcp_fsf_req_free - free memory used by fsf request
106 * @fsf_req: pointer to struct zfcp_fsf_req
1da177e4 107 */
c41f8cbd 108void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
1da177e4 109{
c41f8cbd
SS		 110 if (likely(req->pool)) {
111 mempool_free(req, req->pool);
dd52e0ea
HC		 112 return;
113 }
114
c41f8cbd
SS		 115 if (req->qtcb) {
116 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
dd52e0ea
HC		 117 return;
118 }
1da177e4
LT		 119}
120
c41f8cbd
SS		 121/**
122 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
123 * @adapter: pointer to struct zfcp_adapter
124 *
869b2b44
MP		 125 * Never ever call this without shutting down the adapter first.
126 * Otherwise the adapter would continue using and corrupting s390 storage.
127 * Included BUG_ON() call to ensure this is done.
128 * ERP is supposed to be the only user of this function.
1da177e4 129 */
6fcc4711 130void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
1da177e4 131{
c41f8cbd 132 struct zfcp_fsf_req *req, *tmp;
fea9d6c7 133 unsigned long flags;
6fcc4711 134 LIST_HEAD(remove_queue);
869b2b44 135 unsigned int i;
fea9d6c7 136
c41f8cbd 137 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
fea9d6c7 138 spin_lock_irqsave(&adapter->req_list_lock, flags);
869b2b44 139 for (i = 0; i < REQUEST_LIST_SIZE; i++)
6fcc4711 140 list_splice_init(&adapter->req_list[i], &remove_queue);
fea9d6c7
VS		 141 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
142
c41f8cbd
SS		 143 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
144 list_del(&req->list);
145 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
146 zfcp_fsf_req_complete(req);
1da177e4 147 }
1da177e4
LT		 148}
149
c41f8cbd 150static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
1da177e4 151{
c41f8cbd
SS		 152 struct fsf_status_read_buffer *sr_buf = req->data;
153 struct zfcp_adapter *adapter = req->adapter;
154 struct zfcp_port *port;
155 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
156 unsigned long flags;
1da177e4 157
c41f8cbd
SS		 158 read_lock_irqsave(&zfcp_data.config_lock, flags);
159 list_for_each_entry(port, &adapter->port_list_head, list)
160 if (port->d_id == d_id) {
161 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
162 switch (sr_buf->status_subtype) {
163 case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
164 zfcp_erp_port_reopen(port, 0, 101, req);
165 break;
166 case FSF_STATUS_READ_SUB_ERROR_PORT:
167 zfcp_erp_port_shutdown(port, 0, 122, req);
168 break;
169 }
170 return;
171 }
172 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1da177e4
LT		 173}
174
c41f8cbd
SS		 175static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
176 struct fsf_link_down_info *link_down)
aef4a983 177{
c41f8cbd 178 struct zfcp_adapter *adapter = req->adapter;
698ec016 179
c41f8cbd 180 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
ee69ab7a
MS		 181 return;
182
183 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
184
c41f8cbd 185 if (!link_down)
2f8f3ed5 186 goto out;
ee69ab7a 187
aef4a983
MS		 188 switch (link_down->error_code) {
189 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 190 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 191 "There is no light signal from the local "
192 "fibre channel cable\n");
aef4a983
MS		 193 break;
194 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 195 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 196 "There is a wrap plug instead of a fibre "
197 "channel cable\n");
aef4a983
MS		 198 break;
199 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 200 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 201 "The adjacent fibre channel node does not "
202 "support FCP\n");
aef4a983
MS		 203 break;
204 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 205 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 206 "The FCP device is suspended because of a "
207 "firmware update\n");
553448f6 208 break;
aef4a983 209 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 210 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 211 "The FCP device detected a WWPN that is "
212 "duplicate or not valid\n");
aef4a983
MS		 213 break;
214 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 215 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 216 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 217 break;
218 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 219 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 220 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 221 break;
222 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 223 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 224 "The adjacent switch cannot support "
225 "more NPIV ports\n");
aef4a983
MS		 226 break;
227 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 228 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 229 "The FCP adapter could not log in to the "
230 "fibre channel fabric\n");
aef4a983
MS		 231 break;
232 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 233 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 234 "The WWPN assignment file on the FCP adapter "
235 "has been damaged\n");
aef4a983
MS		 236 break;
237 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 238 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 239 "The mode table on the FCP adapter "
240 "has been damaged\n");
aef4a983
MS		 241 break;
242 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 243 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 244 "All NPIV ports on the FCP adapter have "
245 "been assigned\n");
aef4a983
MS		 246 break;
247 default:
c41f8cbd 248 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 249 "The link between the FCP adapter and "
250 "the FC fabric is down\n");
aef4a983 251 }
c41f8cbd
SS		 252out:
253 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 254}
255
c41f8cbd 256static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 257{
c41f8cbd
SS		 258 struct fsf_status_read_buffer *sr_buf = req->data;
259 struct fsf_link_down_info *ldi =
260 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 261
c41f8cbd
SS		 262 switch (sr_buf->status_subtype) {
263 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
c41f8cbd 264 zfcp_fsf_link_down_info_eval(req, 38, ldi);
1da177e4 265 break;
c41f8cbd 266 case FSF_STATUS_READ_SUB_FDISC_FAILED:
c41f8cbd 267 zfcp_fsf_link_down_info_eval(req, 39, ldi);
1da177e4 268 break;
c41f8cbd 269 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
c41f8cbd
SS		 270 zfcp_fsf_link_down_info_eval(req, 40, NULL);
271 };
272}
1da177e4 273
c41f8cbd
SS		 274static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
275{
276 struct zfcp_adapter *adapter = req->adapter;
277 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 278
c41f8cbd
SS		 279 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
280 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
281 mempool_free(sr_buf, adapter->pool.data_status_read);
282 zfcp_fsf_req_free(req);
283 return;
284 }
1da177e4 285
c41f8cbd 286 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
1da177e4 287
c41f8cbd
SS		 288 switch (sr_buf->status_type) {
289 case FSF_STATUS_READ_PORT_CLOSED:
290 zfcp_fsf_status_read_port_closed(req);
1da177e4 291 break;
c41f8cbd
SS		 292 case FSF_STATUS_READ_INCOMING_ELS:
293 zfcp_fc_incoming_els(req);
1da177e4 294 break;
c41f8cbd 295 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 296 break;
c41f8cbd 297 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 298 dev_warn(&adapter->ccw_device->dev,
299 "The error threshold for checksum statistics "
300 "has been exceeded\n");
57069386 301 zfcp_hba_dbf_event_berr(adapter, req);
1da177e4 302 break;
c41f8cbd
SS		 303 case FSF_STATUS_READ_LINK_DOWN:
304 zfcp_fsf_status_read_link_down(req);
305 break;
306 case FSF_STATUS_READ_LINK_UP:
307 dev_info(&adapter->ccw_device->dev,
ff3b24fa 308 "The local link has been restored\n");
c41f8cbd
SS		 309 /* All ports should be marked as ready to run again */
310 zfcp_erp_modify_adapter_status(adapter, 30, NULL,
311 ZFCP_STATUS_COMMON_RUNNING,
312 ZFCP_SET);
313 zfcp_erp_adapter_reopen(adapter,
314 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
315 ZFCP_STATUS_COMMON_ERP_FAILED,
316 102, req);
317 break;
318 case FSF_STATUS_READ_NOTIFICATION_LOST:
319 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
320 zfcp_erp_adapter_access_changed(adapter, 135, req);
321 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
322 schedule_work(&adapter->scan_work);
323 break;
324 case FSF_STATUS_READ_CFDC_UPDATED:
325 zfcp_erp_adapter_access_changed(adapter, 136, req);
326 break;
327 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
328 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 329 break;
1da177e4
LT		 330 }
331
c41f8cbd
SS		 332 mempool_free(sr_buf, adapter->pool.data_status_read);
333 zfcp_fsf_req_free(req);
1da177e4 334
c41f8cbd 335 atomic_inc(&adapter->stat_miss);
b7f15f3c 336 queue_work(zfcp_data.work_queue, &adapter->stat_work);
c41f8cbd 337}
1da177e4 338
c41f8cbd
SS		 339static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
340{
341 switch (req->qtcb->header.fsf_status_qual.word[0]) {
342 case FSF_SQ_FCP_RSP_AVAILABLE:
343 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
344 case FSF_SQ_NO_RETRY_POSSIBLE:
345 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
346 return;
347 case FSF_SQ_COMMAND_ABORTED:
348 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
349 break;
350 case FSF_SQ_NO_RECOM:
351 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 352 "The FCP adapter reported a problem "
353 "that cannot be recovered\n");
c41f8cbd
SS		 354 zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
355 break;
356 }
357 /* all non-return stats set FSFREQ_ERROR*/
358 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 359}
360
c41f8cbd 361static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 362{
c41f8cbd
SS		 363 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
364 return;
1da177e4 365
c41f8cbd
SS		 366 switch (req->qtcb->header.fsf_status) {
367 case FSF_UNKNOWN_COMMAND:
368 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 369 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd
SS		 370 req->qtcb->header.fsf_command);
371 zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
372 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
373 break;
374 case FSF_ADAPTER_STATUS_AVAILABLE:
375 zfcp_fsf_fsfstatus_qual_eval(req);
376 break;
377 }
378}
1da177e4 379
c41f8cbd
SS		 380static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
381{
382 struct zfcp_adapter *adapter = req->adapter;
383 struct fsf_qtcb *qtcb = req->qtcb;
384 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 385
c41f8cbd 386 zfcp_hba_dbf_event_fsf_response(req);
1da177e4 387
c41f8cbd
SS		 388 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
389 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
390 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
391 return;
392 }
1da177e4 393
c41f8cbd
SS		 394 switch (qtcb->prefix.prot_status) {
395 case FSF_PROT_GOOD:
396 case FSF_PROT_FSF_STATUS_PRESENTED:
397 return;
398 case FSF_PROT_QTCB_VERSION_ERROR:
399 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 400 "QTCB version 0x%x not supported by FCP adapter "
401 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
402 psq->word[0], psq->word[1]);
c41f8cbd
SS		 403 zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
404 break;
405 case FSF_PROT_ERROR_STATE:
406 case FSF_PROT_SEQ_NUMB_ERROR:
407 zfcp_erp_adapter_reopen(adapter, 0, 98, req);
408 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
409 break;
410 case FSF_PROT_UNSUPP_QTCB_TYPE:
411 dev_err(&adapter->ccw_device->dev,
ff3b24fa 412 "The QTCB type is not supported by the FCP adapter\n");
c41f8cbd
SS		 413 zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
414 break;
415 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
416 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
417 &adapter->status);
418 break;
419 case FSF_PROT_DUPLICATE_REQUEST_ID:
420 dev_err(&adapter->ccw_device->dev,
ff3b24fa 421 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd
SS		 422 (unsigned long long)qtcb->bottom.support.req_handle);
423 zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
424 break;
425 case FSF_PROT_LINK_DOWN:
426 zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
427 /* FIXME: reopening adapter now? better wait for link up */
428 zfcp_erp_adapter_reopen(adapter, 0, 79, req);
429 break;
430 case FSF_PROT_REEST_QUEUE:
431 /* All ports should be marked as ready to run again */
432 zfcp_erp_modify_adapter_status(adapter, 28, NULL,
433 ZFCP_STATUS_COMMON_RUNNING,
434 ZFCP_SET);
435 zfcp_erp_adapter_reopen(adapter,
436 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
437 ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
438 break;
439 default:
440 dev_err(&adapter->ccw_device->dev,
ff3b24fa 441 "0x%x is not a valid transfer protocol status\n",
c41f8cbd
SS		 442 qtcb->prefix.prot_status);
443 zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
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");
529 zfcp_erp_adapter_shutdown(adapter, 0, 127, 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);
c41f8cbd
SS		 563 zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
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
c41f8cbd
SS		 580 zfcp_fsf_link_down_info_eval(req, 42,
581 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 582 break;
c41f8cbd
SS		 583 default:
584 zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
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");
c41f8cbd
SS		 600 zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
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");
c41f8cbd
SS		 607 zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
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
c41f8cbd
SS		 620 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
621 fc_host_permanent_port_name(shost) = bottom->wwpn;
622 else
623 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
624 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
625 fc_host_supported_speeds(shost) = bottom->supported_speed;
626}
1da177e4 627
c41f8cbd
SS		 628static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
629{
c41f8cbd
SS		 630 struct fsf_qtcb *qtcb = req->qtcb;
631
632 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
633 return;
634
635 switch (qtcb->header.fsf_status) {
636 case FSF_GOOD:
637 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 638 break;
639 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
640 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 641 zfcp_fsf_link_down_info_eval(req, 43,
642 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 643 break;
1da177e4 644 }
c41f8cbd 645}
d26ab06e 646
0406289e 647static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
c41f8cbd 648{
0406289e
CS		 649 struct zfcp_qdio_queue *req_q = &adapter->req_q;
650
651 spin_lock_bh(&adapter->req_q_lock);
652 if (atomic_read(&req_q->count))
c41f8cbd 653 return 1;
0406289e 654 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 655 return 0;
1da177e4
LT		 656}
657
2450d3e7
SR		 658static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
659{
660 unsigned int count = atomic_read(&adapter->req_q.count);
661 if (!count)
662 atomic_inc(&adapter->qdio_outb_full);
663 return count > 0;
664}
665
c41f8cbd
SS		 666static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
667{
668 long ret;
c41f8cbd 669
0406289e 670 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 671 ret = wait_event_interruptible_timeout(adapter->request_wq,
0406289e 672 zfcp_fsf_sbal_check(adapter), 5 * HZ);
c41f8cbd
SS		 673 if (ret > 0)
674 return 0;
2450d3e7
SR		 675 if (!ret)
676 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd 677
0406289e 678 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 679 return -EIO;
680}
681
682static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
683{
684 struct zfcp_fsf_req *req;
685 req = mempool_alloc(pool, GFP_ATOMIC);
686 if (!req)
687 return NULL;
688 memset(req, 0, sizeof(*req));
88f2a977 689 req->pool = pool;
c41f8cbd
SS		 690 return req;
691}
692
693static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
694{
695 struct zfcp_fsf_req_qtcb *qtcb;
696
697 if (likely(pool))
698 qtcb = mempool_alloc(pool, GFP_ATOMIC);
699 else
700 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
701 GFP_ATOMIC);
702 if (unlikely(!qtcb))
703 return NULL;
704
705 memset(qtcb, 0, sizeof(*qtcb));
706 qtcb->fsf_req.qtcb = &qtcb->qtcb;
707 qtcb->fsf_req.pool = pool;
708
709 return &qtcb->fsf_req;
710}
711
712static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
713 u32 fsf_cmd, int req_flags,
714 mempool_t *pool)
1da177e4 715{
44cc76f2 716 struct qdio_buffer_element *sbale;
1da177e4 717
c41f8cbd
SS		 718 struct zfcp_fsf_req *req;
719 struct zfcp_qdio_queue *req_q = &adapter->req_q;
951f746f 720
c41f8cbd
SS		 721 if (req_flags & ZFCP_REQ_NO_QTCB)
722 req = zfcp_fsf_alloc_noqtcb(pool);
723 else
724 req = zfcp_fsf_alloc_qtcb(pool);
1da177e4 725
c41f8cbd
SS		 726 if (unlikely(!req))
727 return ERR_PTR(-EIO);
1da177e4 728
c41f8cbd
SS		 729 if (adapter->req_no == 0)
730 adapter->req_no++;
1da177e4 731
c41f8cbd
SS		 732 INIT_LIST_HEAD(&req->list);
733 init_timer(&req->timer);
734 init_waitqueue_head(&req->completion_wq);
1da177e4 735
c41f8cbd
SS		 736 req->adapter = adapter;
737 req->fsf_command = fsf_cmd;
738 req->req_id = adapter->req_no++;
739 req->sbal_number = 1;
740 req->sbal_first = req_q->first;
741 req->sbal_last = req_q->first;
742 req->sbale_curr = 1;
743
744 sbale = zfcp_qdio_sbale_req(req);
745 sbale[0].addr = (void *) req->req_id;
746 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
747
748 if (likely(req->qtcb)) {
749 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_id = req->req_id;
751 req->qtcb->prefix.ulp_info = 26;
752 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
753 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
754 req->qtcb->header.req_handle = req->req_id;
755 req->qtcb->header.fsf_command = req->fsf_command;
756 req->seq_no = adapter->fsf_req_seq_no;
757 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
758 sbale[1].addr = (void *) req->qtcb;
759 sbale[1].length = sizeof(struct fsf_qtcb);
760 }
761
762 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
763 zfcp_fsf_req_free(req);
764 return ERR_PTR(-EIO);
765 }
951f746f 766
c41f8cbd
SS		 767 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
768 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1da177e4 769
c41f8cbd 770 return req;
1da177e4
LT		 771}
772
c41f8cbd
SS		 773static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
774{
775 struct zfcp_adapter *adapter = req->adapter;
45316a86 776 unsigned long flags;
c41f8cbd
SS		 777 int idx;
778
779 /* put allocated FSF request into hash table */
45316a86 780 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 781 idx = zfcp_reqlist_hash(req->req_id);
782 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 783 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 784
3765138a 785 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
c41f8cbd
SS		 786 req->issued = get_clock();
787 if (zfcp_qdio_send(req)) {
c41f8cbd 788 del_timer(&req->timer);
3765138a
CS		 789 spin_lock_irqsave(&adapter->req_list_lock, flags);
790 /* lookup request again, list might have changed */
791 if (zfcp_reqlist_find_safe(adapter, req))
792 zfcp_reqlist_remove(adapter, req);
793 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd
SS		 794 zfcp_erp_adapter_reopen(adapter, 0, 116, req);
795 return -EIO;
796 }
797
798 /* Don't increase for unsolicited status */
799 if (req->qtcb)
800 adapter->fsf_req_seq_no++;
801
802 return 0;
803}
804
805/**
806 * zfcp_fsf_status_read - send status read request
807 * @adapter: pointer to struct zfcp_adapter
808 * @req_flags: request flags
809 * Returns: 0 on success, ERROR otherwise
1da177e4 810 */
c41f8cbd 811int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
1da177e4 812{
c41f8cbd
SS		 813 struct zfcp_fsf_req *req;
814 struct fsf_status_read_buffer *sr_buf;
44cc76f2 815 struct qdio_buffer_element *sbale;
c41f8cbd 816 int retval = -EIO;
1da177e4 817
0406289e 818 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 819 if (zfcp_fsf_req_sbal_get(adapter))
820 goto out;
821
822 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
823 ZFCP_REQ_NO_QTCB,
824 adapter->pool.fsf_req_status_read);
025270f0 825 if (IS_ERR(req)) {
c41f8cbd
SS		 826 retval = PTR_ERR(req);
827 goto out;
1da177e4
LT		 828 }
829
c41f8cbd
SS		 830 sbale = zfcp_qdio_sbale_req(req);
831 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
832 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
833 req->sbale_curr = 2;
834
835 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
836 if (!sr_buf) {
837 retval = -ENOMEM;
838 goto failed_buf;
839 }
840 memset(sr_buf, 0, sizeof(*sr_buf));
841 req->data = sr_buf;
842 sbale = zfcp_qdio_sbale_curr(req);
843 sbale->addr = (void *) sr_buf;
844 sbale->length = sizeof(*sr_buf);
059c97d0 845
c41f8cbd
SS		 846 retval = zfcp_fsf_req_send(req);
847 if (retval)
848 goto failed_req_send;
1da177e4 849
c41f8cbd
SS		 850 goto out;
851
852failed_req_send:
853 mempool_free(sr_buf, adapter->pool.data_status_read);
854failed_buf:
855 zfcp_fsf_req_free(req);
856 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
857out:
0406289e 858 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 859 return retval;
860}
861
862static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
863{
864 struct zfcp_unit *unit = req->data;
865 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
866
867 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
868 return;
869
870 switch (req->qtcb->header.fsf_status) {
1da177e4 871 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 872 if (fsq->word[0] == fsq->word[1]) {
9467a9b3 873 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
c41f8cbd
SS		 874 req);
875 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 876 }
877 break;
1da177e4 878 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd
SS		 879 if (fsq->word[0] == fsq->word[1]) {
880 zfcp_erp_port_reopen(unit->port, 0, 105, req);
881 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 882 }
883 break;
1da177e4 884 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 885 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 886 break;
1da177e4 887 case FSF_PORT_BOXED:
c41f8cbd
SS		 888 zfcp_erp_port_boxed(unit->port, 47, req);
889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 891 break;
1da177e4 892 case FSF_LUN_BOXED:
c41f8cbd
SS		 893 zfcp_erp_unit_boxed(unit, 48, req);
894 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
895 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 896 break;
1da177e4 897 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 898 switch (fsq->word[0]) {
1da177e4 899 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 900 zfcp_test_link(unit->port);
1da177e4 901 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 902 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 903 break;
1da177e4
LT		 904 }
905 break;
1da177e4 906 case FSF_GOOD:
c41f8cbd 907 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 908 break;
1da177e4 909 }
1da177e4
LT		 910}
911
912/**
c41f8cbd
SS		 913 * zfcp_fsf_abort_fcp_command - abort running SCSI command
914 * @old_req_id: unsigned long
915 * @adapter: pointer to struct zfcp_adapter
916 * @unit: pointer to struct zfcp_unit
917 * @req_flags: integer specifying the request flags
918 * Returns: pointer to struct zfcp_fsf_req
919 *
920 * FIXME(design): should be watched by a timeout !!!
1da177e4 921 */
1da177e4 922
c41f8cbd
SS		 923struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
924 struct zfcp_adapter *adapter,
925 struct zfcp_unit *unit,
926 int req_flags)
1da177e4 927{
44cc76f2 928 struct qdio_buffer_element *sbale;
c41f8cbd 929 struct zfcp_fsf_req *req = NULL;
8a36e453 930
0406289e 931 spin_lock(&adapter->req_q_lock);
2450d3e7 932 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 933 goto out;
934 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
935 req_flags, adapter->pool.fsf_req_abort);
633528c3
SS		 936 if (IS_ERR(req)) {
937 req = NULL;
c41f8cbd 938 goto out;
633528c3 939 }
2abbe866 940
c41f8cbd
SS		 941 if (unlikely(!(atomic_read(&unit->status) &
942 ZFCP_STATUS_COMMON_UNBLOCKED)))
943 goto out_error_free;
1da177e4 944
c41f8cbd
SS		 945 sbale = zfcp_qdio_sbale_req(req);
946 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
947 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 948
c41f8cbd
SS		 949 req->data = unit;
950 req->handler = zfcp_fsf_abort_fcp_command_handler;
951 req->qtcb->header.lun_handle = unit->handle;
952 req->qtcb->header.port_handle = unit->port->handle;
953 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
954
955 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
956 if (!zfcp_fsf_req_send(req))
957 goto out;
958
959out_error_free:
960 zfcp_fsf_req_free(req);
961 req = NULL;
962out:
0406289e 963 spin_unlock(&adapter->req_q_lock);
c41f8cbd 964 return req;
1da177e4
LT		 965}
966
c41f8cbd 967static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 968{
c41f8cbd
SS		 969 struct zfcp_adapter *adapter = req->adapter;
970 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 971 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 972
c41f8cbd 973 send_ct->status = -EINVAL;
1da177e4 974
c41f8cbd 975 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 976 goto skip_fsfstatus;
977
1da177e4 978 switch (header->fsf_status) {
1da177e4 979 case FSF_GOOD:
c41f8cbd
SS		 980 zfcp_san_dbf_event_ct_response(req);
981 send_ct->status = 0;
1da177e4 982 break;
1da177e4 983 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 984 zfcp_fsf_class_not_supp(req);
1da177e4 985 break;
1da177e4 986 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 987 switch (header->fsf_status_qual.word[0]){
988 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 989 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 990 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 991 break;
1da177e4
LT		 992 }
993 break;
1da177e4 994 case FSF_ACCESS_DENIED:
1da177e4 995 break;
1da177e4 996 case FSF_PORT_BOXED:
c41f8cbd
SS		 997 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
998 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 999 break;
c41f8cbd
SS		 1000 case FSF_PORT_HANDLE_NOT_VALID:
1001 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
1002 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 1003 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1004 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1005 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1006 case FSF_SBAL_MISMATCH:
c41f8cbd 1007 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1008 break;
1009 }
1010
1011skip_fsfstatus:
c41f8cbd 1012 if (send_ct->handler)
1da177e4 1013 send_ct->handler(send_ct->handler_data);
c41f8cbd 1014}
1da177e4 1015
c41f8cbd
SS		 1016static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
1017 struct scatterlist *sg_req,
1018 struct scatterlist *sg_resp, int max_sbals)
1019{
1020 int bytes;
1021
1022 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1023 sg_req, max_sbals);
1024 if (bytes <= 0)
1025 return -ENOMEM;
1026 req->qtcb->bottom.support.req_buf_length = bytes;
1027 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1028
1029 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1030 sg_resp, max_sbals);
1031 if (bytes <= 0)
1032 return -ENOMEM;
1033 req->qtcb->bottom.support.resp_buf_length = bytes;
1034
1035 return 0;
1da177e4
LT		 1036}
1037
1038/**
c41f8cbd
SS		 1039 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1040 * @ct: pointer to struct zfcp_send_ct with data for request
1041 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1042 * @erp_action: if non-null the Generic Service request sent within ERP
1da177e4 1043 */
c41f8cbd
SS		 1044int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1045 struct zfcp_erp_action *erp_action)
1da177e4 1046{
5ab944f9
SS		 1047 struct zfcp_wka_port *wka_port = ct->wka_port;
1048 struct zfcp_adapter *adapter = wka_port->adapter;
c41f8cbd
SS		 1049 struct zfcp_fsf_req *req;
1050 int ret = -EIO;
1da177e4 1051
0406289e 1052 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1053 if (zfcp_fsf_req_sbal_get(adapter))
1054 goto out;
1da177e4 1055
c41f8cbd
SS		 1056 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1057 ZFCP_REQ_AUTO_CLEANUP, pool);
025270f0 1058 if (IS_ERR(req)) {
c41f8cbd
SS		 1059 ret = PTR_ERR(req);
1060 goto out;
3f0ca62a
CS		 1061 }
1062
c41f8cbd
SS		 1063 ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
1064 FSF_MAX_SBALS_PER_REQ);
553448f6 1065 if (ret)
1da177e4 1066 goto failed_send;
1da177e4 1067
c41f8cbd 1068 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1069 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1070 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1071 req->qtcb->bottom.support.timeout = ct->timeout;
1072 req->data = ct;
1073
1074 zfcp_san_dbf_event_ct_request(req);
1075
1076 if (erp_action) {
1077 erp_action->fsf_req = req;
1078 req->erp_action = erp_action;
287ac01a 1079 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 1080 } else
1081 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1082
c41f8cbd
SS		 1083 ret = zfcp_fsf_req_send(req);
1084 if (ret)
1085 goto failed_send;
1da177e4 1086
c41f8cbd 1087 goto out;
1da177e4 1088
c41f8cbd
SS		 1089failed_send:
1090 zfcp_fsf_req_free(req);
1091 if (erp_action)
1092 erp_action->fsf_req = NULL;
1093out:
0406289e 1094 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1095 return ret;
1da177e4
LT		 1096}
1097
c41f8cbd 1098static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1099{
c41f8cbd
SS		 1100 struct zfcp_send_els *send_els = req->data;
1101 struct zfcp_port *port = send_els->port;
1102 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1103
c41f8cbd 1104 send_els->status = -EINVAL;
1da177e4 1105
c41f8cbd 1106 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1107 goto skip_fsfstatus;
1108
1109 switch (header->fsf_status) {
1da177e4 1110 case FSF_GOOD:
c41f8cbd
SS		 1111 zfcp_san_dbf_event_els_response(req);
1112 send_els->status = 0;
1da177e4 1113 break;
1da177e4 1114 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1115 zfcp_fsf_class_not_supp(req);
1da177e4 1116 break;
1da177e4 1117 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1118 switch (header->fsf_status_qual.word[0]){
1119 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1120 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1121 zfcp_test_link(port);
c41f8cbd 1122 /*fall through */
1da177e4 1123 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1124 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1125 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1126 break;
1da177e4
LT		 1127 }
1128 break;
1da177e4 1129 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1130 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1131 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1132 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1133 break;
1da177e4 1134 case FSF_ACCESS_DENIED:
c41f8cbd 1135 zfcp_fsf_access_denied_port(req, port);
1da177e4 1136 break;
c41f8cbd
SS		 1137 case FSF_SBAL_MISMATCH:
1138 /* should never occure, avoided in zfcp_fsf_send_els */
1139 /* fall through */
1da177e4 1140 default:
c41f8cbd 1141 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1142 break;
1143 }
1da177e4 1144skip_fsfstatus:
aa551daf 1145 if (send_els->handler)
1da177e4 1146 send_els->handler(send_els->handler_data);
c41f8cbd 1147}
1da177e4 1148
c41f8cbd
SS		 1149/**
1150 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1151 * @els: pointer to struct zfcp_send_els with data for the command
1152 */
1153int zfcp_fsf_send_els(struct zfcp_send_els *els)
1154{
1155 struct zfcp_fsf_req *req;
1156 struct zfcp_adapter *adapter = els->adapter;
1157 struct fsf_qtcb_bottom_support *bottom;
1158 int ret = -EIO;
1159
1160 if (unlikely(!(atomic_read(&els->port->status) &
1161 ZFCP_STATUS_COMMON_UNBLOCKED)))
1162 return -EBUSY;
1163
0406289e 1164 spin_lock(&adapter->req_q_lock);
2450d3e7 1165 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1166 goto out;
1167 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1168 ZFCP_REQ_AUTO_CLEANUP, NULL);
025270f0 1169 if (IS_ERR(req)) {
c41f8cbd
SS		 1170 ret = PTR_ERR(req);
1171 goto out;
1172 }
1173
44cc76f2
SS		 1174 ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2);
1175
c41f8cbd
SS		 1176 if (ret)
1177 goto failed_send;
1178
1179 bottom = &req->qtcb->bottom.support;
1180 req->handler = zfcp_fsf_send_els_handler;
1181 bottom->d_id = els->d_id;
1182 bottom->service_class = FSF_CLASS_3;
1183 bottom->timeout = 2 * R_A_TOV;
1184 req->data = els;
1185
1186 zfcp_san_dbf_event_els_request(req);
1187
1188 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1189 ret = zfcp_fsf_req_send(req);
1190 if (ret)
1191 goto failed_send;
1192
1193 goto out;
1194
1195failed_send:
1196 zfcp_fsf_req_free(req);
1197out:
0406289e 1198 spin_unlock(&adapter->req_q_lock);
c41f8cbd 1199 return ret;
1da177e4
LT		 1200}
1201
c41f8cbd 1202int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1203{
44cc76f2 1204 struct qdio_buffer_element *sbale;
c41f8cbd 1205 struct zfcp_fsf_req *req;
52ef11a7 1206 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd
SS		 1207 int retval = -EIO;
1208
0406289e 1209 spin_lock_bh(&adapter->req_q_lock);
2450d3e7 1210 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1211 goto out;
1212 req = zfcp_fsf_req_create(adapter,
1213 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1214 ZFCP_REQ_AUTO_CLEANUP,
1215 adapter->pool.fsf_req_erp);
025270f0 1216 if (IS_ERR(req)) {
c41f8cbd
SS		 1217 retval = PTR_ERR(req);
1218 goto out;
1da177e4
LT		 1219 }
1220
c41f8cbd 1221 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1222 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1223 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1224
c41f8cbd 1225 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1226 FSF_FEATURE_CFDC |
1227 FSF_FEATURE_LUN_SHARING |
9eb69aff 1228 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1229 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1230 req->erp_action = erp_action;
1231 req->handler = zfcp_fsf_exchange_config_data_handler;
1232 erp_action->fsf_req = req;
1da177e4 1233
287ac01a 1234 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1235 retval = zfcp_fsf_req_send(req);
1da177e4 1236 if (retval) {
c41f8cbd 1237 zfcp_fsf_req_free(req);
1da177e4 1238 erp_action->fsf_req = NULL;
1da177e4 1239 }
c41f8cbd 1240out:
0406289e 1241 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1242 return retval;
1243}
1da177e4 1244
c41f8cbd
SS		 1245int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1246 struct fsf_qtcb_bottom_config *data)
52ef11a7 1247{
44cc76f2 1248 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1249 struct zfcp_fsf_req *req = NULL;
1250 int retval = -EIO;
1251
0406289e 1252 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1253 if (zfcp_fsf_req_sbal_get(adapter))
1254 goto out;
1255
1256 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1257 0, NULL);
025270f0 1258 if (IS_ERR(req)) {
c41f8cbd
SS		 1259 retval = PTR_ERR(req);
1260 goto out;
52ef11a7
SS		 1261 }
1262
c41f8cbd 1263 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1264 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1265 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1266 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1267
c41f8cbd 1268 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1269 FSF_FEATURE_CFDC |
1270 FSF_FEATURE_LUN_SHARING |
1271 FSF_FEATURE_NOTIFICATION_LOST |
1272 FSF_FEATURE_UPDATE_ALERT;
1273
1274 if (data)
c41f8cbd 1275 req->data = data;
52ef11a7 1276
c41f8cbd
SS		 1277 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1278 retval = zfcp_fsf_req_send(req);
1279out:
0406289e 1280 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1281 if (!retval)
c41f8cbd
SS		 1282 wait_event(req->completion_wq,
1283 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7 1284
c41f8cbd 1285 zfcp_fsf_req_free(req);
52ef11a7 1286
1da177e4
LT		 1287 return retval;
1288}
1289
1da177e4
LT		 1290/**
1291 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1292 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1293 * Returns: 0 on success, error otherwise
1da177e4 1294 */
c41f8cbd 1295int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1296{
44cc76f2 1297 struct qdio_buffer_element *sbale;
c41f8cbd 1298 struct zfcp_fsf_req *req;
52ef11a7 1299 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd 1300 int retval = -EIO;
1da177e4 1301
553448f6 1302 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1303 return -EOPNOTSUPP;
1da177e4 1304
0406289e 1305 spin_lock_bh(&adapter->req_q_lock);
2450d3e7 1306 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1307 goto out;
1308 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1309 ZFCP_REQ_AUTO_CLEANUP,
1310 adapter->pool.fsf_req_erp);
025270f0 1311 if (IS_ERR(req)) {
c41f8cbd
SS		 1312 retval = PTR_ERR(req);
1313 goto out;
aef4a983
MS		 1314 }
1315
c41f8cbd 1316 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1317 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1318 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1319
c41f8cbd
SS		 1320 req->handler = zfcp_fsf_exchange_port_data_handler;
1321 req->erp_action = erp_action;
1322 erp_action->fsf_req = req;
52ef11a7 1323
287ac01a 1324 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1325 retval = zfcp_fsf_req_send(req);
1da177e4 1326 if (retval) {
c41f8cbd 1327 zfcp_fsf_req_free(req);
52ef11a7
SS		 1328 erp_action->fsf_req = NULL;
1329 }
c41f8cbd 1330out:
0406289e 1331 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1332 return retval;
1333}
1334
52ef11a7
SS		 1335/**
1336 * zfcp_fsf_exchange_port_data_sync - request information about local port
c41f8cbd
SS		 1337 * @adapter: pointer to struct zfcp_adapter
1338 * @data: pointer to struct fsf_qtcb_bottom_port
1339 * Returns: 0 on success, error otherwise
52ef11a7 1340 */
c41f8cbd
SS		 1341int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1342 struct fsf_qtcb_bottom_port *data)
52ef11a7 1343{
44cc76f2 1344 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1345 struct zfcp_fsf_req *req = NULL;
1346 int retval = -EIO;
52ef11a7 1347
553448f6 1348 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1349 return -EOPNOTSUPP;
52ef11a7 1350
0406289e 1351 spin_lock_bh(&adapter->req_q_lock);
2450d3e7 1352 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1353 goto out;
1354
1355 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1356 NULL);
025270f0 1357 if (IS_ERR(req)) {
c41f8cbd
SS		 1358 retval = PTR_ERR(req);
1359 goto out;
1da177e4
LT		 1360 }
1361
52ef11a7 1362 if (data)
c41f8cbd 1363 req->data = data;
52ef11a7 1364
c41f8cbd 1365 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1366 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1367 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1368
c41f8cbd
SS		 1369 req->handler = zfcp_fsf_exchange_port_data_handler;
1370 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1371 retval = zfcp_fsf_req_send(req);
1372out:
0406289e 1373 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1374 if (!retval)
c41f8cbd
SS		 1375 wait_event(req->completion_wq,
1376 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1377 zfcp_fsf_req_free(req);
1da177e4 1378
1da177e4
LT		 1379 return retval;
1380}
1381
c41f8cbd 1382static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1383{
c41f8cbd
SS		 1384 struct zfcp_port *port = req->data;
1385 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1386 struct fsf_plogi *plogi;
1da177e4 1387
c41f8cbd 1388 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1389 return;
1da177e4 1390
1da177e4 1391 switch (header->fsf_status) {
1da177e4 1392 case FSF_PORT_ALREADY_OPEN:
1da177e4 1393 break;
1da177e4 1394 case FSF_ACCESS_DENIED:
c41f8cbd 1395 zfcp_fsf_access_denied_port(req, port);
1da177e4 1396 break;
1da177e4 1397 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1398 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1399 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1400 "remote port 0x%016Lx\n",
1401 (unsigned long long)port->wwpn);
c41f8cbd
SS		 1402 zfcp_erp_port_failed(port, 31, req);
1403 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1404 break;
1da177e4 1405 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1406 switch (header->fsf_status_qual.word[0]) {
1407 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1408 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1409 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1410 break;
1411 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1412 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1413 "Remote port 0x%016Lx could not be opened\n",
7ba58c9c 1414 (unsigned long long)port->wwpn);
c41f8cbd
SS		 1415 zfcp_erp_port_failed(port, 32, req);
1416 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1417 break;
1418 }
1419 break;
1da177e4 1420 case FSF_GOOD:
1da177e4 1421 port->handle = header->port_handle;
1da177e4
LT		 1422 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1423 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1424 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1425 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1426 &port->status);
1da177e4
LT		 1427 /* check whether D_ID has changed during open */
1428 /*
1429 * FIXME: This check is not airtight, as the FCP channel does
1430 * not monitor closures of target port connections caused on
1431 * the remote side. Thus, they might miss out on invalidating
1432 * locally cached WWPNs (and other N_Port parameters) of gone
1433 * target ports. So, our heroic attempt to make things safe
1434 * could be undermined by 'open port' response data tagged with
1435 * obsolete WWPNs. Another reason to monitor potential
1436 * connection closures ourself at least (by interpreting
1437 * incoming ELS' and unsolicited status). It just crosses my
1438 * mind that one should be able to cross-check by means of
1439 * another GID_PN straight after a port has been opened.
1440 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1441 */
c41f8cbd
SS		 1442 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
1443 if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
1444 if (plogi->serv_param.wwpn != port->wwpn)
1445 atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
1446 &port->status);
1447 else {
1448 port->wwnn = plogi->serv_param.wwnn;
1449 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1450 }
1451 }
1452 break;
1da177e4 1453 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1454 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1455 break;
1456 }
1da177e4
LT		 1457}
1458
c41f8cbd
SS		 1459/**
1460 * zfcp_fsf_open_port - create and send open port request
1461 * @erp_action: pointer to struct zfcp_erp_action
1462 * Returns: 0 on success, error otherwise
1da177e4 1463 */
c41f8cbd 1464int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1465{
44cc76f2 1466 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1467 struct zfcp_adapter *adapter = erp_action->adapter;
1468 struct zfcp_fsf_req *req;
1469 int retval = -EIO;
1470
0406289e 1471 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1472 if (zfcp_fsf_req_sbal_get(adapter))
1473 goto out;
1474
1475 req = zfcp_fsf_req_create(adapter,
1476 FSF_QTCB_OPEN_PORT_WITH_DID,
1477 ZFCP_REQ_AUTO_CLEANUP,
1478 adapter->pool.fsf_req_erp);
025270f0 1479 if (IS_ERR(req)) {
c41f8cbd 1480 retval = PTR_ERR(req);
1da177e4 1481 goto out;
c41f8cbd 1482 }
1da177e4 1483
c41f8cbd 1484 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1485 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1486 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1487
c41f8cbd
SS		 1488 req->handler = zfcp_fsf_open_port_handler;
1489 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1490 req->data = erp_action->port;
1491 req->erp_action = erp_action;
1492 erp_action->fsf_req = req;
c41f8cbd 1493
287ac01a 1494 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1495 retval = zfcp_fsf_req_send(req);
1da177e4 1496 if (retval) {
c41f8cbd 1497 zfcp_fsf_req_free(req);
1da177e4 1498 erp_action->fsf_req = NULL;
1da177e4 1499 }
c41f8cbd 1500out:
0406289e 1501 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1502 return retval;
1503}
1504
c41f8cbd 1505static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1506{
c41f8cbd 1507 struct zfcp_port *port = req->data;
1da177e4 1508
c41f8cbd 1509 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1510 return;
1da177e4 1511
c41f8cbd 1512 switch (req->qtcb->header.fsf_status) {
1da177e4 1513 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1514 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1515 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1516 break;
1da177e4 1517 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1518 break;
1da177e4 1519 case FSF_GOOD:
c41f8cbd 1520 zfcp_erp_modify_port_status(port, 33, req,
1da177e4
LT		 1521 ZFCP_STATUS_COMMON_OPEN,
1522 ZFCP_CLEAR);
1da177e4 1523 break;
1da177e4 1524 }
1da177e4
LT		 1525}
1526
c41f8cbd
SS		 1527/**
1528 * zfcp_fsf_close_port - create and send close port request
1529 * @erp_action: pointer to struct zfcp_erp_action
1530 * Returns: 0 on success, error otherwise
1da177e4 1531 */
c41f8cbd 1532int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1533{
44cc76f2 1534 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1535 struct zfcp_adapter *adapter = erp_action->adapter;
1536 struct zfcp_fsf_req *req;
1537 int retval = -EIO;
1538
0406289e 1539 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1540 if (zfcp_fsf_req_sbal_get(adapter))
1541 goto out;
1542
1543 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1544 ZFCP_REQ_AUTO_CLEANUP,
1545 adapter->pool.fsf_req_erp);
025270f0 1546 if (IS_ERR(req)) {
c41f8cbd 1547 retval = PTR_ERR(req);
1da177e4 1548 goto out;
c41f8cbd 1549 }
1da177e4 1550
c41f8cbd 1551 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1552 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1553 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1554
c41f8cbd
SS		 1555 req->handler = zfcp_fsf_close_port_handler;
1556 req->data = erp_action->port;
1557 req->erp_action = erp_action;
1558 req->qtcb->header.port_handle = erp_action->port->handle;
1559 erp_action->fsf_req = req;
c41f8cbd 1560
287ac01a 1561 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1562 retval = zfcp_fsf_req_send(req);
1da177e4 1563 if (retval) {
c41f8cbd 1564 zfcp_fsf_req_free(req);
1da177e4 1565 erp_action->fsf_req = NULL;
1da177e4 1566 }
c41f8cbd 1567out:
0406289e 1568 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1569 return retval;
1570}
1571
5ab944f9
SS		 1572static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1573{
1574 struct zfcp_wka_port *wka_port = req->data;
1575 struct fsf_qtcb_header *header = &req->qtcb->header;
1576
1577 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1578 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1579 goto out;
1580 }
1581
1582 switch (header->fsf_status) {
1583 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1584 dev_warn(&req->adapter->ccw_device->dev,
1585 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1586 case FSF_ADAPTER_STATUS_AVAILABLE:
1587 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1588 case FSF_ACCESS_DENIED:
1589 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1590 break;
1591 case FSF_PORT_ALREADY_OPEN:
1c1cba17 1592 break;
5ab944f9
SS		 1593 case FSF_GOOD:
1594 wka_port->handle = header->port_handle;
1595 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1596 }
1597out:
1598 wake_up(&wka_port->completion_wq);
1599}
1600
1601/**
1602 * zfcp_fsf_open_wka_port - create and send open wka-port request
1603 * @wka_port: pointer to struct zfcp_wka_port
1604 * Returns: 0 on success, error otherwise
1605 */
1606int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1607{
1608 struct qdio_buffer_element *sbale;
1609 struct zfcp_adapter *adapter = wka_port->adapter;
1610 struct zfcp_fsf_req *req;
1611 int retval = -EIO;
1612
0406289e 1613 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1614 if (zfcp_fsf_req_sbal_get(adapter))
1615 goto out;
1616
1617 req = zfcp_fsf_req_create(adapter,
1618 FSF_QTCB_OPEN_PORT_WITH_DID,
1619 ZFCP_REQ_AUTO_CLEANUP,
1620 adapter->pool.fsf_req_erp);
1621 if (unlikely(IS_ERR(req))) {
1622 retval = PTR_ERR(req);
1623 goto out;
1624 }
1625
1626 sbale = zfcp_qdio_sbale_req(req);
1627 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1628 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1629
1630 req->handler = zfcp_fsf_open_wka_port_handler;
1631 req->qtcb->bottom.support.d_id = wka_port->d_id;
1632 req->data = wka_port;
1633
1634 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1635 retval = zfcp_fsf_req_send(req);
1636 if (retval)
1637 zfcp_fsf_req_free(req);
1638out:
0406289e 1639 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1640 return retval;
1641}
1642
1643static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1644{
1645 struct zfcp_wka_port *wka_port = req->data;
1646
1647 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1648 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
41bfcf90 1649 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
5ab944f9
SS		 1650 }
1651
1652 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1653 wake_up(&wka_port->completion_wq);
1654}
1655
1656/**
1657 * zfcp_fsf_close_wka_port - create and send close wka port request
1658 * @erp_action: pointer to struct zfcp_erp_action
1659 * Returns: 0 on success, error otherwise
1660 */
1661int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1662{
1663 struct qdio_buffer_element *sbale;
1664 struct zfcp_adapter *adapter = wka_port->adapter;
1665 struct zfcp_fsf_req *req;
1666 int retval = -EIO;
1667
0406289e 1668 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1669 if (zfcp_fsf_req_sbal_get(adapter))
1670 goto out;
1671
1672 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1673 ZFCP_REQ_AUTO_CLEANUP,
1674 adapter->pool.fsf_req_erp);
1675 if (unlikely(IS_ERR(req))) {
1676 retval = PTR_ERR(req);
1677 goto out;
1678 }
1679
1680 sbale = zfcp_qdio_sbale_req(req);
1681 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1682 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1683
1684 req->handler = zfcp_fsf_close_wka_port_handler;
1685 req->data = wka_port;
1686 req->qtcb->header.port_handle = wka_port->handle;
1687
1688 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1689 retval = zfcp_fsf_req_send(req);
1690 if (retval)
1691 zfcp_fsf_req_free(req);
1692out:
0406289e 1693 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1694 return retval;
1695}
1696
c41f8cbd 1697static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1698{
c41f8cbd
SS		 1699 struct zfcp_port *port = req->data;
1700 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1701 struct zfcp_unit *unit;
1da177e4 1702
c41f8cbd 1703 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4 1704 goto skip_fsfstatus;
1da177e4 1705
1da177e4 1706 switch (header->fsf_status) {
1da177e4 1707 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1708 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1709 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1710 break;
1da177e4 1711 case FSF_ACCESS_DENIED:
c41f8cbd 1712 zfcp_fsf_access_denied_port(req, port);
1da177e4 1713 break;
1da177e4 1714 case FSF_PORT_BOXED:
c41f8cbd
SS		 1715 zfcp_erp_port_boxed(port, 50, req);
1716 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1717 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 1718 /* can't use generic zfcp_erp_modify_port_status because
1719 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1720 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1721 list_for_each_entry(unit, &port->unit_list_head, list)
1722 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1723 &unit->status);
1da177e4 1724 break;
1da177e4 1725 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1726 switch (header->fsf_status_qual.word[0]) {
1727 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1728 /* fall through */
1da177e4 1729 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1730 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1731 break;
1da177e4
LT		 1732 }
1733 break;
1da177e4 1734 case FSF_GOOD:
1da177e4
LT		 1735 /* can't use generic zfcp_erp_modify_port_status because
1736 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1737 */
1738 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1739 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1740 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1741 &unit->status);
1da177e4 1742 break;
1da177e4 1743 }
c41f8cbd 1744skip_fsfstatus:
1da177e4 1745 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
1da177e4
LT		 1746}
1747
c41f8cbd
SS		 1748/**
1749 * zfcp_fsf_close_physical_port - close physical port
1750 * @erp_action: pointer to struct zfcp_erp_action
1751 * Returns: 0 on success
1da177e4 1752 */
c41f8cbd 1753int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1754{
44cc76f2 1755 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1756 struct zfcp_adapter *adapter = erp_action->adapter;
1757 struct zfcp_fsf_req *req;
1758 int retval = -EIO;
1759
0406289e 1760 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1761 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1762 goto out;
1da177e4 1763
c41f8cbd
SS		 1764 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1765 ZFCP_REQ_AUTO_CLEANUP,
1766 adapter->pool.fsf_req_erp);
025270f0 1767 if (IS_ERR(req)) {
c41f8cbd
SS		 1768 retval = PTR_ERR(req);
1769 goto out;
1770 }
1da177e4 1771
c41f8cbd
SS		 1772 sbale = zfcp_qdio_sbale_req(req);
1773 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1774 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1775
c41f8cbd
SS		 1776 req->data = erp_action->port;
1777 req->qtcb->header.port_handle = erp_action->port->handle;
1778 req->erp_action = erp_action;
1779 req->handler = zfcp_fsf_close_physical_port_handler;
1780 erp_action->fsf_req = req;
1781 atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
1782 &erp_action->port->status);
1783
287ac01a 1784 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1785 retval = zfcp_fsf_req_send(req);
1da177e4 1786 if (retval) {
c41f8cbd 1787 zfcp_fsf_req_free(req);
1da177e4 1788 erp_action->fsf_req = NULL;
1da177e4 1789 }
c41f8cbd 1790out:
0406289e 1791 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1792 return retval;
1793}
1794
c41f8cbd 1795static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1796{
c41f8cbd
SS		 1797 struct zfcp_adapter *adapter = req->adapter;
1798 struct zfcp_unit *unit = req->data;
1799 struct fsf_qtcb_header *header = &req->qtcb->header;
1800 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1801 struct fsf_queue_designator *queue_designator =
1802 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1803 int exclusive, readwrite;
1da177e4 1804
c41f8cbd 1805 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1806 return;
1da177e4 1807
1da177e4 1808 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1809 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1810 ZFCP_STATUS_UNIT_SHARED |
1811 ZFCP_STATUS_UNIT_READONLY,
1812 &unit->status);
1813
1da177e4
LT		 1814 switch (header->fsf_status) {
1815
1816 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1817 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1818 /* fall through */
1da177e4 1819 case FSF_LUN_ALREADY_OPEN:
1da177e4 1820 break;
1da177e4 1821 case FSF_ACCESS_DENIED:
c41f8cbd 1822 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1823 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1824 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1825 break;
1da177e4 1826 case FSF_PORT_BOXED:
c41f8cbd
SS		 1827 zfcp_erp_port_boxed(unit->port, 51, req);
1828 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1829 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1830 break;
1da177e4 1831 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1832 if (header->fsf_status_qual.word[0])
553448f6 1833 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1834 "LUN 0x%Lx on port 0x%Lx is already in "
1835 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1836 (unsigned long long)unit->fcp_lun,
1837 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1838 queue_designator->cssid,
1839 queue_designator->hla);
c41f8cbd 1840 else
553448f6
CS		 1841 zfcp_act_eval_err(adapter,
1842 header->fsf_status_qual.word[2]);
c41f8cbd 1843 zfcp_erp_unit_access_denied(unit, 60, req);
1da177e4
LT		 1844 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1845 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1846 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1847 break;
1da177e4 1848 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1849 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1850 "No handle is available for LUN "
1851 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1852 (unsigned long long)unit->fcp_lun,
1853 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1854 zfcp_erp_unit_failed(unit, 34, req);
1855 /* fall through */
1856 case FSF_INVALID_COMMAND_OPTION:
1857 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1858 break;
1da177e4 1859 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1860 switch (header->fsf_status_qual.word[0]) {
1861 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1862 zfcp_test_link(unit->port);
c41f8cbd 1863 /* fall through */
1da177e4 1864 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1865 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1866 break;
1da177e4
LT		 1867 }
1868 break;
1869
1da177e4 1870 case FSF_GOOD:
1da177e4 1871 unit->handle = header->lun_handle;
1da177e4 1872 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1873
1874 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1875 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1876 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1877 exclusive = (bottom->lun_access_info &
1878 FSF_UNIT_ACCESS_EXCLUSIVE);
1879 readwrite = (bottom->lun_access_info &
1880 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1881
1da177e4
LT		 1882 if (!exclusive)
1883 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1884 &unit->status);
1885
1886 if (!readwrite) {
1887 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1888 &unit->status);
c41f8cbd 1889 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1890 "SCSI device at LUN 0x%016Lx on port "
1891 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1892 (unsigned long long)unit->fcp_lun,
1893 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1894 }
1895
1896 if (exclusive && !readwrite) {
c41f8cbd 1897 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1898 "Exclusive read-only access not "
1899 "supported (unit 0x%016Lx, "
1900 "port 0x%016Lx)\n",
7ba58c9c
SS		 1901 (unsigned long long)unit->fcp_lun,
1902 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1903 zfcp_erp_unit_failed(unit, 35, req);
1904 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1905 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1da177e4 1906 } else if (!exclusive && readwrite) {
c41f8cbd 1907 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1908 "Shared read-write access not "
1909 "supported (unit 0x%016Lx, port "
27c3f0a6 1910 "0x%016Lx)\n",
7ba58c9c
SS		 1911 (unsigned long long)unit->fcp_lun,
1912 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1913 zfcp_erp_unit_failed(unit, 36, req);
1914 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1915 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1da177e4
LT		 1916 }
1917 }
1da177e4 1918 break;
1da177e4 1919 }
1da177e4
LT		 1920}
1921
c41f8cbd
SS		 1922/**
1923 * zfcp_fsf_open_unit - open unit
1924 * @erp_action: pointer to struct zfcp_erp_action
1925 * Returns: 0 on success, error otherwise
1da177e4 1926 */
c41f8cbd 1927int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1928{
44cc76f2 1929 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1930 struct zfcp_adapter *adapter = erp_action->adapter;
1931 struct zfcp_fsf_req *req;
1932 int retval = -EIO;
1933
0406289e 1934 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1935 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1936 goto out;
1da177e4 1937
c41f8cbd
SS		 1938 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1939 ZFCP_REQ_AUTO_CLEANUP,
1940 adapter->pool.fsf_req_erp);
025270f0 1941 if (IS_ERR(req)) {
c41f8cbd
SS		 1942 retval = PTR_ERR(req);
1943 goto out;
1944 }
1945
1946 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1947 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1948 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1949
c41f8cbd
SS		 1950 req->qtcb->header.port_handle = erp_action->port->handle;
1951 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1952 req->handler = zfcp_fsf_open_unit_handler;
1953 req->data = erp_action->unit;
1954 req->erp_action = erp_action;
1955 erp_action->fsf_req = req;
1956
1957 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1958 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1959
287ac01a 1960 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1961 retval = zfcp_fsf_req_send(req);
1da177e4 1962 if (retval) {
c41f8cbd 1963 zfcp_fsf_req_free(req);
1da177e4 1964 erp_action->fsf_req = NULL;
1da177e4 1965 }
c41f8cbd 1966out:
0406289e 1967 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1968 return retval;
1969}
1970
c41f8cbd 1971static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1972{
c41f8cbd 1973 struct zfcp_unit *unit = req->data;
1da177e4 1974
c41f8cbd 1975 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1976 return;
1da177e4 1977
c41f8cbd 1978 switch (req->qtcb->header.fsf_status) {
1da177e4 1979 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1980 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1981 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1982 break;
1da177e4 1983 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd
SS		 1984 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1985 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1986 break;
1da177e4 1987 case FSF_PORT_BOXED:
c41f8cbd
SS		 1988 zfcp_erp_port_boxed(unit->port, 52, req);
1989 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1990 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1991 break;
1da177e4 1992 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 1993 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 1994 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1995 zfcp_test_link(unit->port);
c41f8cbd 1996 /* fall through */
1da177e4 1997 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1998 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1999 break;
2000 }
2001 break;
1da177e4 2002 case FSF_GOOD:
1da177e4 2003 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2004 break;
1da177e4 2005 }
1da177e4
LT		 2006}
2007
2008/**
c41f8cbd
SS		 2009 * zfcp_fsf_close_unit - close zfcp unit
2010 * @erp_action: pointer to struct zfcp_unit
2011 * Returns: 0 on success, error otherwise
1da177e4 2012 */
c41f8cbd 2013int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2014{
44cc76f2 2015 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2016 struct zfcp_adapter *adapter = erp_action->adapter;
2017 struct zfcp_fsf_req *req;
2018 int retval = -EIO;
1da177e4 2019
0406289e 2020 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 2021 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 2022 goto out;
c41f8cbd
SS		 2023 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2024 ZFCP_REQ_AUTO_CLEANUP,
2025 adapter->pool.fsf_req_erp);
025270f0 2026 if (IS_ERR(req)) {
c41f8cbd
SS		 2027 retval = PTR_ERR(req);
2028 goto out;
2029 }
1da177e4 2030
c41f8cbd
SS		 2031 sbale = zfcp_qdio_sbale_req(req);
2032 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2033 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2034
c41f8cbd
SS		 2035 req->qtcb->header.port_handle = erp_action->port->handle;
2036 req->qtcb->header.lun_handle = erp_action->unit->handle;
2037 req->handler = zfcp_fsf_close_unit_handler;
2038 req->data = erp_action->unit;
2039 req->erp_action = erp_action;
2040 erp_action->fsf_req = req;
fdf23452 2041
287ac01a 2042 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2043 retval = zfcp_fsf_req_send(req);
2044 if (retval) {
2045 zfcp_fsf_req_free(req);
2046 erp_action->fsf_req = NULL;
2047 }
2048out:
0406289e 2049 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 2050 return retval;
1da177e4
LT		 2051}
2052
c9615858
CS		 2053static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2054{
2055 lat_rec->sum += lat;
c41f8cbd
SS		 2056 lat_rec->min = min(lat_rec->min, lat);
2057 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2058}
2059
c41f8cbd 2060static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2061{
2062 struct fsf_qual_latency_info *lat_inf;
2063 struct latency_cont *lat;
c41f8cbd 2064 struct zfcp_unit *unit = req->unit;
c9615858
CS		 2065 unsigned long flags;
2066
c41f8cbd 2067 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2068
c41f8cbd 2069 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2070 case FSF_DATADIR_READ:
2071 lat = &unit->latencies.read;
2072 break;
2073 case FSF_DATADIR_WRITE:
2074 lat = &unit->latencies.write;
2075 break;
2076 case FSF_DATADIR_CMND:
2077 lat = &unit->latencies.cmd;
2078 break;
2079 default:
2080 return;
2081 }
2082
2083 spin_lock_irqsave(&unit->latencies.lock, flags);
2084 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2085 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2086 lat->counter++;
c41f8cbd 2087 spin_unlock_irqrestore(&unit->latencies.lock, flags);
1da177e4
LT		 2088}
2089
0997f1c5
SR		 2090#ifdef CONFIG_BLK_DEV_IO_TRACE
2091static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2092{
2093 struct fsf_qual_latency_info *lat_inf;
2094 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2095 struct request *req = scsi_cmnd->request;
2096 struct zfcp_blk_drv_data trace;
2097 int ticks = fsf_req->adapter->timer_ticks;
2098
2099 trace.flags = 0;
2100 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2101 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2102 trace.flags |= ZFCP_BLK_LAT_VALID;
2103 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2104 trace.channel_lat = lat_inf->channel_lat * ticks;
2105 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2106 }
2107 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2108 trace.flags |= ZFCP_BLK_REQ_ERROR;
2109 trace.inb_usage = fsf_req->qdio_inb_usage;
2110 trace.outb_usage = fsf_req->qdio_outb_usage;
2111
2112 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2113}
2114#else
2115static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2116{
2117}
2118#endif
2119
c41f8cbd 2120static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2121{
0ac55aa9 2122 struct scsi_cmnd *scpnt;
1da177e4 2123 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2124 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2125 u32 sns_len;
f76af7d7 2126 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2127 unsigned long flags;
1da177e4 2128
c41f8cbd
SS		 2129 read_lock_irqsave(&req->adapter->abort_lock, flags);
2130
0ac55aa9
SS		 2131 scpnt = req->data;
2132 if (unlikely(!scpnt)) {
2133 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2134 return;
2135 }
2136
c41f8cbd 2137 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07
MP		 2138 set_host_byte(scpnt, DID_SOFT_ERROR);
2139 set_driver_byte(scpnt, SUGGEST_RETRY);
1da177e4
LT		 2140 goto skip_fsfstatus;
2141 }
2142
c41f8cbd 2143 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2144 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2145 goto skip_fsfstatus;
2146 }
2147
feac6a07 2148 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2149
1da177e4 2150 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2151
c41f8cbd
SS		 2152 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2153 zfcp_fsf_req_latency(req);
c9615858 2154
0997f1c5
SR		 2155 zfcp_fsf_trace_latency(req);
2156
1da177e4 2157 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2158 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2159 set_host_byte(scpnt, DID_OK);
c41f8cbd 2160 else {
feac6a07 2161 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2162 goto skip_fsfstatus;
1da177e4
LT		 2163 }
2164 }
2165
1da177e4 2166 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2167 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2168 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2169 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2170 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2171
9d058ecf 2172 memcpy(scpnt->sense_buffer,
1da177e4 2173 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2174 }
2175
1da177e4 2176 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2177 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2178 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2179 scpnt->underflow)
feac6a07 2180 set_host_byte(scpnt, DID_ERROR);
1da177e4 2181 }
c41f8cbd 2182skip_fsfstatus:
8a36e453 2183 if (scpnt->result != 0)
c41f8cbd 2184 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
8a36e453 2185 else if (scpnt->retries > 0)
c41f8cbd 2186 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
8a36e453 2187 else
c41f8cbd 2188 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
1da177e4 2189
1da177e4 2190 scpnt->host_scribble = NULL;
1da177e4 2191 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2192 /*
2193 * We must hold this lock until scsi_done has been called.
2194 * Otherwise we may call scsi_done after abort regarding this
2195 * command has completed.
2196 * Note: scsi_done must not block!
2197 */
c41f8cbd 2198 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2199}
2200
c41f8cbd 2201static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2202{
1da177e4 2203 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2204 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2205 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2206
c41f8cbd
SS		 2207 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2208 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2209 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2210}
2211
2212
2213static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2214{
2215 struct zfcp_unit *unit;
2216 struct fsf_qtcb_header *header = &req->qtcb->header;
2217
2218 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2219 unit = req->data;
2220 else
2221 unit = req->unit;
2222
2223 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2224 goto skip_fsfstatus;
1da177e4 2225
c41f8cbd
SS		 2226 switch (header->fsf_status) {
2227 case FSF_HANDLE_MISMATCH:
2228 case FSF_PORT_HANDLE_NOT_VALID:
2229 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2230 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2231 break;
2232 case FSF_FCPLUN_NOT_VALID:
2233 case FSF_LUN_HANDLE_NOT_VALID:
2234 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2235 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2236 break;
c41f8cbd
SS		 2237 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2238 zfcp_fsf_class_not_supp(req);
1da177e4 2239 break;
c41f8cbd
SS		 2240 case FSF_ACCESS_DENIED:
2241 zfcp_fsf_access_denied_unit(req, unit);
2242 break;
2243 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2244 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2245 "Incorrect direction %d, unit 0x%016Lx on port "
2246 "0x%016Lx closed\n",
c41f8cbd 2247 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2248 (unsigned long long)unit->fcp_lun,
2249 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2250 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2251 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2252 break;
2253 case FSF_CMND_LENGTH_NOT_VALID:
2254 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2255 "Incorrect CDB length %d, unit 0x%016Lx on "
2256 "port 0x%016Lx closed\n",
c41f8cbd 2257 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2258 (unsigned long long)unit->fcp_lun,
2259 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2260 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2261 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2262 break;
2263 case FSF_PORT_BOXED:
2264 zfcp_erp_port_boxed(unit->port, 53, req);
2265 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2266 ZFCP_STATUS_FSFREQ_RETRY;
2267 break;
2268 case FSF_LUN_BOXED:
2269 zfcp_erp_unit_boxed(unit, 54, req);
2270 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2271 ZFCP_STATUS_FSFREQ_RETRY;
2272 break;
2273 case FSF_ADAPTER_STATUS_AVAILABLE:
2274 if (header->fsf_status_qual.word[0] ==
2275 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2276 zfcp_test_link(unit->port);
2277 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2278 break;
1da177e4 2279 }
c41f8cbd
SS		 2280skip_fsfstatus:
2281 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2282 zfcp_fsf_send_fcp_ctm_handler(req);
2283 else {
2284 zfcp_fsf_send_fcp_command_task_handler(req);
2285 req->unit = NULL;
2286 zfcp_unit_put(unit);
2287 }
1da177e4
LT		 2288}
2289
7ba58c9c
SS		 2290static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2291{
2292 u32 *fcp_dl_ptr;
2293
2294 /*
2295 * fcp_dl_addr = start address of fcp_cmnd structure +
2296 * size of fixed part + size of dynamically sized add_dcp_cdb field
2297 * SEE FCP-2 documentation
2298 */
2299 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2300 (fcp_cmd->add_fcp_cdb_length << 2));
2301 *fcp_dl_ptr = fcp_dl;
2302}
2303
c41f8cbd
SS		 2304/**
2305 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2306 * @adapter: adapter where scsi command is issued
2307 * @unit: unit where command is sent to
2308 * @scsi_cmnd: scsi command to be sent
2309 * @timer: timer to be started when request is initiated
2310 * @req_flags: flags for fsf_request
1da177e4 2311 */
c41f8cbd
SS		 2312int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2313 struct zfcp_unit *unit,
2314 struct scsi_cmnd *scsi_cmnd,
2315 int use_timer, int req_flags)
1da177e4 2316{
c41f8cbd
SS		 2317 struct zfcp_fsf_req *req;
2318 struct fcp_cmnd_iu *fcp_cmnd_iu;
2319 unsigned int sbtype;
2320 int real_bytes, retval = -EIO;
1da177e4 2321
c41f8cbd
SS		 2322 if (unlikely(!(atomic_read(&unit->status) &
2323 ZFCP_STATUS_COMMON_UNBLOCKED)))
2324 return -EBUSY;
1da177e4 2325
0406289e 2326 spin_lock(&adapter->req_q_lock);
2450d3e7 2327 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 2328 goto out;
2329 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2330 adapter->pool.fsf_req_scsi);
025270f0 2331 if (IS_ERR(req)) {
c41f8cbd
SS		 2332 retval = PTR_ERR(req);
2333 goto out;
2334 }
2335
2336 zfcp_unit_get(unit);
2337 req->unit = unit;
2338 req->data = scsi_cmnd;
2339 req->handler = zfcp_fsf_send_fcp_command_handler;
2340 req->qtcb->header.lun_handle = unit->handle;
2341 req->qtcb->header.port_handle = unit->port->handle;
2342 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2343
2344 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2345
2346 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2347 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2348 /*
2349 * set depending on data direction:
2350 * data direction bits in SBALE (SB Type)
2351 * data direction bits in QTCB
2352 * data direction bits in FCP_CMND IU
2353 */
2354 switch (scsi_cmnd->sc_data_direction) {
2355 case DMA_NONE:
2356 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2357 sbtype = SBAL_FLAGS0_TYPE_READ;
1da177e4 2358 break;
c41f8cbd
SS		 2359 case DMA_FROM_DEVICE:
2360 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2361 sbtype = SBAL_FLAGS0_TYPE_READ;
2362 fcp_cmnd_iu->rddata = 1;
2363 break;
2364 case DMA_TO_DEVICE:
2365 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2366 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2367 fcp_cmnd_iu->wddata = 1;
1da177e4 2368 break;
c41f8cbd 2369 case DMA_BIDIRECTIONAL:
1da177e4 2370 default:
c41f8cbd
SS		 2371 retval = -EIO;
2372 goto failed_scsi_cmnd;
1da177e4
LT		 2373 }
2374
c41f8cbd
SS		 2375 if (likely((scsi_cmnd->device->simple_tags) ||
2376 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2377 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2378 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2379 else
2380 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2381
c41f8cbd
SS		 2382 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2383 fcp_cmnd_iu->add_fcp_cdb_length =
2384 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2385
c41f8cbd 2386 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2387
c41f8cbd 2388 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2389 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2390
c41f8cbd
SS		 2391 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2392 scsi_sglist(scsi_cmnd),
2393 FSF_MAX_SBALS_PER_REQ);
2394 if (unlikely(real_bytes < 0)) {
2395 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2396 retval = -EIO;
2397 else {
2398 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2399 "Oversize data package, unit 0x%016Lx "
2400 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2401 (unsigned long long)unit->fcp_lun,
2402 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2403 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2404 retval = -EINVAL;
2405 }
2406 goto failed_scsi_cmnd;
1da177e4 2407 }
1da177e4 2408
c41f8cbd 2409 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2410
c41f8cbd
SS		 2411 if (use_timer)
2412 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 2413
c41f8cbd
SS		 2414 retval = zfcp_fsf_req_send(req);
2415 if (unlikely(retval))
2416 goto failed_scsi_cmnd;
1da177e4 2417
c41f8cbd 2418 goto out;
1da177e4 2419
c41f8cbd
SS		 2420failed_scsi_cmnd:
2421 zfcp_unit_put(unit);
2422 zfcp_fsf_req_free(req);
2423 scsi_cmnd->host_scribble = NULL;
2424out:
0406289e 2425 spin_unlock(&adapter->req_q_lock);
c41f8cbd 2426 return retval;
1da177e4
LT		 2427}
2428
2429/**
c41f8cbd
SS		 2430 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2431 * @adapter: pointer to struct zfcp-adapter
2432 * @unit: pointer to struct zfcp_unit
2433 * @tm_flags: unsigned byte for task management flags
2434 * @req_flags: int request flags
2435 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2436 */
c41f8cbd
SS		 2437struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2438 struct zfcp_unit *unit,
2439 u8 tm_flags, int req_flags)
1da177e4 2440{
44cc76f2 2441 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2442 struct zfcp_fsf_req *req = NULL;
2443 struct fcp_cmnd_iu *fcp_cmnd_iu;
1da177e4 2444
c41f8cbd
SS		 2445 if (unlikely(!(atomic_read(&unit->status) &
2446 ZFCP_STATUS_COMMON_UNBLOCKED)))
2447 return NULL;
1da177e4 2448
0406289e 2449 spin_lock(&adapter->req_q_lock);
2450d3e7 2450 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 2451 goto out;
2452 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2453 adapter->pool.fsf_req_scsi);
633528c3
SS		 2454 if (IS_ERR(req)) {
2455 req = NULL;
c41f8cbd 2456 goto out;
633528c3 2457 }
1da177e4 2458
c41f8cbd
SS		 2459 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2460 req->data = unit;
2461 req->handler = zfcp_fsf_send_fcp_command_handler;
2462 req->qtcb->header.lun_handle = unit->handle;
2463 req->qtcb->header.port_handle = unit->port->handle;
2464 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2465 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2466 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2467 sizeof(u32);
c41f8cbd
SS		 2468
2469 sbale = zfcp_qdio_sbale_req(req);
2470 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2471 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2472
c41f8cbd
SS		 2473 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2474 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2475 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2476
c41f8cbd
SS		 2477 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2478 if (!zfcp_fsf_req_send(req))
2479 goto out;
1da177e4 2480
c41f8cbd
SS		 2481 zfcp_fsf_req_free(req);
2482 req = NULL;
2483out:
0406289e 2484 spin_unlock(&adapter->req_q_lock);
c41f8cbd
SS		 2485 return req;
2486}
1da177e4 2487
c41f8cbd
SS		 2488static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2489{
2490 if (req->qtcb->header.fsf_status != FSF_GOOD)
2491 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2492}
2493
c41f8cbd
SS		 2494/**
2495 * zfcp_fsf_control_file - control file upload/download
2496 * @adapter: pointer to struct zfcp_adapter
2497 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2498 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2499 */
c41f8cbd
SS		 2500struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2501 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2502{
44cc76f2 2503 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2504 struct zfcp_fsf_req *req = NULL;
2505 struct fsf_qtcb_bottom_support *bottom;
2506 int direction, retval = -EIO, bytes;
2507
2508 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2509 return ERR_PTR(-EOPNOTSUPP);
2510
2511 switch (fsf_cfdc->command) {
2512 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2513 direction = SBAL_FLAGS0_TYPE_WRITE;
2514 break;
2515 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2516 direction = SBAL_FLAGS0_TYPE_READ;
2517 break;
2518 default:
2519 return ERR_PTR(-EINVAL);
2520 }
1da177e4 2521
0406289e 2522 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2523 if (zfcp_fsf_req_sbal_get(adapter))
2524 goto out;
1da177e4 2525
c41f8cbd 2526 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
025270f0 2527 if (IS_ERR(req)) {
c41f8cbd
SS		 2528 retval = -EPERM;
2529 goto out;
2530 }
1da177e4 2531
c41f8cbd 2532 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2533
c41f8cbd
SS		 2534 sbale = zfcp_qdio_sbale_req(req);
2535 sbale[0].flags |= direction;
8a36e453 2536
c41f8cbd
SS		 2537 bottom = &req->qtcb->bottom.support;
2538 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2539 bottom->option = fsf_cfdc->option;
8a36e453 2540
c41f8cbd
SS		 2541 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2542 FSF_MAX_SBALS_PER_REQ);
2543 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2544 retval = -ENOMEM;
2545 zfcp_fsf_req_free(req);
2546 goto out;
2547 }
1da177e4 2548
c41f8cbd
SS		 2549 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2550 retval = zfcp_fsf_req_send(req);
2551out:
0406289e 2552 spin_unlock_bh(&adapter->req_q_lock);
8a36e453 2553
c41f8cbd
SS		 2554 if (!retval) {
2555 wait_event(req->completion_wq,
2556 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2557 return req;
1da177e4 2558 }
c41f8cbd 2559 return ERR_PTR(retval);
1da177e4 2560}
Linux kernel - Deliverables
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