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[SCSI] zfcp: Wait for free SBALs when possible
[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
dedbc2b3 647static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter)
c41f8cbd 648{
dedbc2b3 649 if (atomic_read(&adapter->req_q.count) > 0)
c41f8cbd 650 return 1;
dedbc2b3 651 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd 652 return 0;
1da177e4
LT		 653}
654
c41f8cbd 655static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
dedbc2b3
CS		 656 __releases(&adapter->req_q_lock)
657 __acquires(&adapter->req_q_lock)
c41f8cbd 658{
dedbc2b3 659 struct zfcp_qdio_queue *req_q = &adapter->req_q;
c41f8cbd 660 long ret;
c41f8cbd 661
dedbc2b3
CS		 662 if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
663 return -EIO;
664 if (atomic_read(&req_q->count) > 0)
665 return 0;
666
667 atomic_dec(&req_q->count);
0406289e 668 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 669 ret = wait_event_interruptible_timeout(adapter->request_wq,
dedbc2b3
CS		 670 atomic_read(&req_q->count) >= 0,
671 5 * HZ);
672 spin_lock_bh(&adapter->req_q_lock);
673 atomic_inc(&req_q->count);
674
c41f8cbd
SS		 675 if (ret > 0)
676 return 0;
2450d3e7
SR		 677 if (!ret)
678 atomic_inc(&adapter->qdio_outb_full);
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;
52bfb558 738 req->req_id = adapter->req_no;
c41f8cbd
SS		 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++;
52bfb558 801 adapter->req_no++;
c41f8cbd
SS		 802
803 return 0;
804}
805
806/**
807 * zfcp_fsf_status_read - send status read request
808 * @adapter: pointer to struct zfcp_adapter
809 * @req_flags: request flags
810 * Returns: 0 on success, ERROR otherwise
1da177e4 811 */
c41f8cbd 812int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
1da177e4 813{
c41f8cbd
SS		 814 struct zfcp_fsf_req *req;
815 struct fsf_status_read_buffer *sr_buf;
44cc76f2 816 struct qdio_buffer_element *sbale;
c41f8cbd 817 int retval = -EIO;
1da177e4 818
0406289e 819 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 820 if (zfcp_fsf_req_sbal_get(adapter))
821 goto out;
822
823 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
824 ZFCP_REQ_NO_QTCB,
825 adapter->pool.fsf_req_status_read);
025270f0 826 if (IS_ERR(req)) {
c41f8cbd
SS		 827 retval = PTR_ERR(req);
828 goto out;
1da177e4
LT		 829 }
830
c41f8cbd
SS		 831 sbale = zfcp_qdio_sbale_req(req);
832 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
833 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
834 req->sbale_curr = 2;
835
836 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
837 if (!sr_buf) {
838 retval = -ENOMEM;
839 goto failed_buf;
840 }
841 memset(sr_buf, 0, sizeof(*sr_buf));
842 req->data = sr_buf;
843 sbale = zfcp_qdio_sbale_curr(req);
844 sbale->addr = (void *) sr_buf;
845 sbale->length = sizeof(*sr_buf);
059c97d0 846
c41f8cbd
SS		 847 retval = zfcp_fsf_req_send(req);
848 if (retval)
849 goto failed_req_send;
1da177e4 850
c41f8cbd
SS		 851 goto out;
852
853failed_req_send:
854 mempool_free(sr_buf, adapter->pool.data_status_read);
855failed_buf:
856 zfcp_fsf_req_free(req);
857 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
858out:
0406289e 859 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 860 return retval;
861}
862
863static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
864{
865 struct zfcp_unit *unit = req->data;
866 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
867
868 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
869 return;
870
871 switch (req->qtcb->header.fsf_status) {
1da177e4 872 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 873 if (fsq->word[0] == fsq->word[1]) {
9467a9b3 874 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
c41f8cbd
SS		 875 req);
876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 877 }
878 break;
1da177e4 879 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd
SS		 880 if (fsq->word[0] == fsq->word[1]) {
881 zfcp_erp_port_reopen(unit->port, 0, 105, req);
882 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 883 }
884 break;
1da177e4 885 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 886 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 887 break;
1da177e4 888 case FSF_PORT_BOXED:
c41f8cbd
SS		 889 zfcp_erp_port_boxed(unit->port, 47, req);
890 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
891 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 892 break;
1da177e4 893 case FSF_LUN_BOXED:
c41f8cbd
SS		 894 zfcp_erp_unit_boxed(unit, 48, req);
895 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
896 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 897 break;
1da177e4 898 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 899 switch (fsq->word[0]) {
1da177e4 900 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 901 zfcp_test_link(unit->port);
1da177e4 902 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 903 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 904 break;
1da177e4
LT		 905 }
906 break;
1da177e4 907 case FSF_GOOD:
c41f8cbd 908 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 909 break;
1da177e4 910 }
1da177e4
LT		 911}
912
913/**
c41f8cbd
SS		 914 * zfcp_fsf_abort_fcp_command - abort running SCSI command
915 * @old_req_id: unsigned long
916 * @adapter: pointer to struct zfcp_adapter
917 * @unit: pointer to struct zfcp_unit
918 * @req_flags: integer specifying the request flags
919 * Returns: pointer to struct zfcp_fsf_req
920 *
921 * FIXME(design): should be watched by a timeout !!!
1da177e4 922 */
1da177e4 923
c41f8cbd
SS		 924struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
925 struct zfcp_adapter *adapter,
926 struct zfcp_unit *unit,
927 int req_flags)
1da177e4 928{
44cc76f2 929 struct qdio_buffer_element *sbale;
c41f8cbd 930 struct zfcp_fsf_req *req = NULL;
8a36e453 931
92cab0d9
CS		 932 spin_lock_bh(&adapter->req_q_lock);
933 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 934 goto out;
935 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
936 req_flags, adapter->pool.fsf_req_abort);
633528c3
SS		 937 if (IS_ERR(req)) {
938 req = NULL;
c41f8cbd 939 goto out;
633528c3 940 }
2abbe866 941
c41f8cbd
SS		 942 if (unlikely(!(atomic_read(&unit->status) &
943 ZFCP_STATUS_COMMON_UNBLOCKED)))
944 goto out_error_free;
1da177e4 945
c41f8cbd
SS		 946 sbale = zfcp_qdio_sbale_req(req);
947 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
948 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 949
c41f8cbd
SS		 950 req->data = unit;
951 req->handler = zfcp_fsf_abort_fcp_command_handler;
952 req->qtcb->header.lun_handle = unit->handle;
953 req->qtcb->header.port_handle = unit->port->handle;
954 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
955
956 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
957 if (!zfcp_fsf_req_send(req))
958 goto out;
959
960out_error_free:
961 zfcp_fsf_req_free(req);
962 req = NULL;
963out:
92cab0d9 964 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 965 return req;
1da177e4
LT		 966}
967
c41f8cbd 968static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 969{
c41f8cbd
SS		 970 struct zfcp_adapter *adapter = req->adapter;
971 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 972 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 973
c41f8cbd 974 send_ct->status = -EINVAL;
1da177e4 975
c41f8cbd 976 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 977 goto skip_fsfstatus;
978
1da177e4 979 switch (header->fsf_status) {
1da177e4 980 case FSF_GOOD:
c41f8cbd
SS		 981 zfcp_san_dbf_event_ct_response(req);
982 send_ct->status = 0;
1da177e4 983 break;
1da177e4 984 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 985 zfcp_fsf_class_not_supp(req);
1da177e4 986 break;
1da177e4 987 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 988 switch (header->fsf_status_qual.word[0]){
989 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 990 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 991 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 992 break;
1da177e4
LT		 993 }
994 break;
1da177e4 995 case FSF_ACCESS_DENIED:
1da177e4 996 break;
1da177e4 997 case FSF_PORT_BOXED:
c41f8cbd
SS		 998 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
999 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1000 break;
c41f8cbd
SS		 1001 case FSF_PORT_HANDLE_NOT_VALID:
1002 zfcp_erp_adapter_reopen(adapter, 0, 106, req);
1003 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 1004 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1005 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1006 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1007 case FSF_SBAL_MISMATCH:
c41f8cbd 1008 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1009 break;
1010 }
1011
1012skip_fsfstatus:
c41f8cbd 1013 if (send_ct->handler)
1da177e4 1014 send_ct->handler(send_ct->handler_data);
c41f8cbd 1015}
1da177e4 1016
39eb7e9a
CS		 1017static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1018 struct scatterlist *sg_req,
1019 struct scatterlist *sg_resp,
1020 int max_sbals)
c41f8cbd 1021{
39eb7e9a
CS		 1022 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1023 u32 feat = req->adapter->adapter_features;
c41f8cbd
SS		 1024 int bytes;
1025
39eb7e9a
CS		 1026 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1027 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1028 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1029 return -EOPNOTSUPP;
1030
1031 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1032 sbale[2].addr = sg_virt(sg_req);
1033 sbale[2].length = sg_req->length;
1034 sbale[3].addr = sg_virt(sg_resp);
1035 sbale[3].length = sg_resp->length;
1036 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1037 return 0;
1038 }
1039
c41f8cbd
SS		 1040 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1041 sg_req, max_sbals);
1042 if (bytes <= 0)
1043 return -ENOMEM;
1044 req->qtcb->bottom.support.req_buf_length = bytes;
1045 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1046
1047 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1048 sg_resp, max_sbals);
1049 if (bytes <= 0)
1050 return -ENOMEM;
1051 req->qtcb->bottom.support.resp_buf_length = bytes;
1052
1053 return 0;
1da177e4
LT		 1054}
1055
1056/**
c41f8cbd
SS		 1057 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1058 * @ct: pointer to struct zfcp_send_ct with data for request
1059 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1060 * @erp_action: if non-null the Generic Service request sent within ERP
1da177e4 1061 */
c41f8cbd
SS		 1062int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1063 struct zfcp_erp_action *erp_action)
1da177e4 1064{
5ab944f9
SS		 1065 struct zfcp_wka_port *wka_port = ct->wka_port;
1066 struct zfcp_adapter *adapter = wka_port->adapter;
c41f8cbd
SS		 1067 struct zfcp_fsf_req *req;
1068 int ret = -EIO;
1da177e4 1069
0406289e 1070 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1071 if (zfcp_fsf_req_sbal_get(adapter))
1072 goto out;
1da177e4 1073
c41f8cbd
SS		 1074 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1075 ZFCP_REQ_AUTO_CLEANUP, pool);
025270f0 1076 if (IS_ERR(req)) {
c41f8cbd
SS		 1077 ret = PTR_ERR(req);
1078 goto out;
3f0ca62a
CS		 1079 }
1080
39eb7e9a
CS		 1081 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1082 FSF_MAX_SBALS_PER_REQ);
553448f6 1083 if (ret)
1da177e4 1084 goto failed_send;
1da177e4 1085
c41f8cbd 1086 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1087 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1088 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1089 req->qtcb->bottom.support.timeout = ct->timeout;
1090 req->data = ct;
1091
1092 zfcp_san_dbf_event_ct_request(req);
1093
1094 if (erp_action) {
1095 erp_action->fsf_req = req;
1096 req->erp_action = erp_action;
287ac01a 1097 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 1098 } else
1099 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1100
c41f8cbd
SS		 1101 ret = zfcp_fsf_req_send(req);
1102 if (ret)
1103 goto failed_send;
1da177e4 1104
c41f8cbd 1105 goto out;
1da177e4 1106
c41f8cbd
SS		 1107failed_send:
1108 zfcp_fsf_req_free(req);
1109 if (erp_action)
1110 erp_action->fsf_req = NULL;
1111out:
0406289e 1112 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1113 return ret;
1da177e4
LT		 1114}
1115
c41f8cbd 1116static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1117{
c41f8cbd
SS		 1118 struct zfcp_send_els *send_els = req->data;
1119 struct zfcp_port *port = send_els->port;
1120 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1121
c41f8cbd 1122 send_els->status = -EINVAL;
1da177e4 1123
c41f8cbd 1124 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1125 goto skip_fsfstatus;
1126
1127 switch (header->fsf_status) {
1da177e4 1128 case FSF_GOOD:
c41f8cbd
SS		 1129 zfcp_san_dbf_event_els_response(req);
1130 send_els->status = 0;
1da177e4 1131 break;
1da177e4 1132 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1133 zfcp_fsf_class_not_supp(req);
1da177e4 1134 break;
1da177e4 1135 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1136 switch (header->fsf_status_qual.word[0]){
1137 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1138 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1139 zfcp_test_link(port);
c41f8cbd 1140 /*fall through */
1da177e4 1141 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1142 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1143 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1144 break;
1da177e4
LT		 1145 }
1146 break;
1da177e4 1147 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1148 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1149 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1150 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1151 break;
1da177e4 1152 case FSF_ACCESS_DENIED:
c41f8cbd 1153 zfcp_fsf_access_denied_port(req, port);
1da177e4 1154 break;
c41f8cbd
SS		 1155 case FSF_SBAL_MISMATCH:
1156 /* should never occure, avoided in zfcp_fsf_send_els */
1157 /* fall through */
1da177e4 1158 default:
c41f8cbd 1159 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1160 break;
1161 }
1da177e4 1162skip_fsfstatus:
aa551daf 1163 if (send_els->handler)
1da177e4 1164 send_els->handler(send_els->handler_data);
c41f8cbd 1165}
1da177e4 1166
c41f8cbd
SS		 1167/**
1168 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1169 * @els: pointer to struct zfcp_send_els with data for the command
1170 */
1171int zfcp_fsf_send_els(struct zfcp_send_els *els)
1172{
1173 struct zfcp_fsf_req *req;
1174 struct zfcp_adapter *adapter = els->adapter;
1175 struct fsf_qtcb_bottom_support *bottom;
1176 int ret = -EIO;
1177
1178 if (unlikely(!(atomic_read(&els->port->status) &
1179 ZFCP_STATUS_COMMON_UNBLOCKED)))
1180 return -EBUSY;
1181
0406289e 1182 spin_lock(&adapter->req_q_lock);
2450d3e7 1183 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 1184 goto out;
1185 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1186 ZFCP_REQ_AUTO_CLEANUP, NULL);
025270f0 1187 if (IS_ERR(req)) {
c41f8cbd
SS		 1188 ret = PTR_ERR(req);
1189 goto out;
1190 }
1191
39eb7e9a 1192 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
44cc76f2 1193
c41f8cbd
SS		 1194 if (ret)
1195 goto failed_send;
1196
1197 bottom = &req->qtcb->bottom.support;
1198 req->handler = zfcp_fsf_send_els_handler;
1199 bottom->d_id = els->d_id;
1200 bottom->service_class = FSF_CLASS_3;
1201 bottom->timeout = 2 * R_A_TOV;
1202 req->data = els;
1203
1204 zfcp_san_dbf_event_els_request(req);
1205
1206 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1207 ret = zfcp_fsf_req_send(req);
1208 if (ret)
1209 goto failed_send;
1210
1211 goto out;
1212
1213failed_send:
1214 zfcp_fsf_req_free(req);
1215out:
0406289e 1216 spin_unlock(&adapter->req_q_lock);
c41f8cbd 1217 return ret;
1da177e4
LT		 1218}
1219
c41f8cbd 1220int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1221{
44cc76f2 1222 struct qdio_buffer_element *sbale;
c41f8cbd 1223 struct zfcp_fsf_req *req;
52ef11a7 1224 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd
SS		 1225 int retval = -EIO;
1226
0406289e 1227 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1228 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1229 goto out;
1230 req = zfcp_fsf_req_create(adapter,
1231 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1232 ZFCP_REQ_AUTO_CLEANUP,
1233 adapter->pool.fsf_req_erp);
025270f0 1234 if (IS_ERR(req)) {
c41f8cbd
SS		 1235 retval = PTR_ERR(req);
1236 goto out;
1da177e4
LT		 1237 }
1238
c41f8cbd 1239 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1240 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1241 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1242
c41f8cbd 1243 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1244 FSF_FEATURE_CFDC |
1245 FSF_FEATURE_LUN_SHARING |
9eb69aff 1246 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1247 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1248 req->erp_action = erp_action;
1249 req->handler = zfcp_fsf_exchange_config_data_handler;
1250 erp_action->fsf_req = req;
1da177e4 1251
287ac01a 1252 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1253 retval = zfcp_fsf_req_send(req);
1da177e4 1254 if (retval) {
c41f8cbd 1255 zfcp_fsf_req_free(req);
1da177e4 1256 erp_action->fsf_req = NULL;
1da177e4 1257 }
c41f8cbd 1258out:
0406289e 1259 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1260 return retval;
1261}
1da177e4 1262
c41f8cbd
SS		 1263int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1264 struct fsf_qtcb_bottom_config *data)
52ef11a7 1265{
44cc76f2 1266 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1267 struct zfcp_fsf_req *req = NULL;
1268 int retval = -EIO;
1269
0406289e 1270 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1271 if (zfcp_fsf_req_sbal_get(adapter))
1272 goto out;
1273
1274 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1275 0, NULL);
025270f0 1276 if (IS_ERR(req)) {
c41f8cbd
SS		 1277 retval = PTR_ERR(req);
1278 goto out;
52ef11a7
SS		 1279 }
1280
c41f8cbd 1281 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1282 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1283 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1284 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1285
c41f8cbd 1286 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1287 FSF_FEATURE_CFDC |
1288 FSF_FEATURE_LUN_SHARING |
1289 FSF_FEATURE_NOTIFICATION_LOST |
1290 FSF_FEATURE_UPDATE_ALERT;
1291
1292 if (data)
c41f8cbd 1293 req->data = data;
52ef11a7 1294
c41f8cbd
SS		 1295 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1296 retval = zfcp_fsf_req_send(req);
1297out:
0406289e 1298 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1299 if (!retval)
c41f8cbd
SS		 1300 wait_event(req->completion_wq,
1301 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7 1302
c41f8cbd 1303 zfcp_fsf_req_free(req);
52ef11a7 1304
1da177e4
LT		 1305 return retval;
1306}
1307
1da177e4
LT		 1308/**
1309 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1310 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1311 * Returns: 0 on success, error otherwise
1da177e4 1312 */
c41f8cbd 1313int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1314{
44cc76f2 1315 struct qdio_buffer_element *sbale;
c41f8cbd 1316 struct zfcp_fsf_req *req;
52ef11a7 1317 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd 1318 int retval = -EIO;
1da177e4 1319
553448f6 1320 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1321 return -EOPNOTSUPP;
1da177e4 1322
0406289e 1323 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1324 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1325 goto out;
1326 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1327 ZFCP_REQ_AUTO_CLEANUP,
1328 adapter->pool.fsf_req_erp);
025270f0 1329 if (IS_ERR(req)) {
c41f8cbd
SS		 1330 retval = PTR_ERR(req);
1331 goto out;
aef4a983
MS		 1332 }
1333
c41f8cbd 1334 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1335 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1336 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1337
c41f8cbd
SS		 1338 req->handler = zfcp_fsf_exchange_port_data_handler;
1339 req->erp_action = erp_action;
1340 erp_action->fsf_req = req;
52ef11a7 1341
287ac01a 1342 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1343 retval = zfcp_fsf_req_send(req);
1da177e4 1344 if (retval) {
c41f8cbd 1345 zfcp_fsf_req_free(req);
52ef11a7
SS		 1346 erp_action->fsf_req = NULL;
1347 }
c41f8cbd 1348out:
0406289e 1349 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1350 return retval;
1351}
1352
52ef11a7
SS		 1353/**
1354 * zfcp_fsf_exchange_port_data_sync - request information about local port
c41f8cbd
SS		 1355 * @adapter: pointer to struct zfcp_adapter
1356 * @data: pointer to struct fsf_qtcb_bottom_port
1357 * Returns: 0 on success, error otherwise
52ef11a7 1358 */
c41f8cbd
SS		 1359int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1360 struct fsf_qtcb_bottom_port *data)
52ef11a7 1361{
44cc76f2 1362 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1363 struct zfcp_fsf_req *req = NULL;
1364 int retval = -EIO;
52ef11a7 1365
553448f6 1366 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1367 return -EOPNOTSUPP;
52ef11a7 1368
0406289e 1369 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1370 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1371 goto out;
1372
1373 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1374 NULL);
025270f0 1375 if (IS_ERR(req)) {
c41f8cbd
SS		 1376 retval = PTR_ERR(req);
1377 goto out;
1da177e4
LT		 1378 }
1379
52ef11a7 1380 if (data)
c41f8cbd 1381 req->data = data;
52ef11a7 1382
c41f8cbd 1383 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1384 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1385 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1386
c41f8cbd
SS		 1387 req->handler = zfcp_fsf_exchange_port_data_handler;
1388 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1389 retval = zfcp_fsf_req_send(req);
1390out:
0406289e 1391 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1392 if (!retval)
c41f8cbd
SS		 1393 wait_event(req->completion_wq,
1394 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1395 zfcp_fsf_req_free(req);
1da177e4 1396
1da177e4
LT		 1397 return retval;
1398}
1399
c41f8cbd 1400static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1401{
c41f8cbd
SS		 1402 struct zfcp_port *port = req->data;
1403 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1404 struct fsf_plogi *plogi;
1da177e4 1405
c41f8cbd 1406 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1407 return;
1da177e4 1408
1da177e4 1409 switch (header->fsf_status) {
1da177e4 1410 case FSF_PORT_ALREADY_OPEN:
1da177e4 1411 break;
1da177e4 1412 case FSF_ACCESS_DENIED:
c41f8cbd 1413 zfcp_fsf_access_denied_port(req, port);
1da177e4 1414 break;
1da177e4 1415 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1416 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1417 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1418 "remote port 0x%016Lx\n",
1419 (unsigned long long)port->wwpn);
c41f8cbd
SS		 1420 zfcp_erp_port_failed(port, 31, req);
1421 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1422 break;
1da177e4 1423 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1424 switch (header->fsf_status_qual.word[0]) {
1425 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1426 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1427 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1428 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1429 break;
1430 }
1431 break;
1da177e4 1432 case FSF_GOOD:
1da177e4 1433 port->handle = header->port_handle;
1da177e4
LT		 1434 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1435 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1436 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1437 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1438 &port->status);
1da177e4
LT		 1439 /* check whether D_ID has changed during open */
1440 /*
1441 * FIXME: This check is not airtight, as the FCP channel does
1442 * not monitor closures of target port connections caused on
1443 * the remote side. Thus, they might miss out on invalidating
1444 * locally cached WWPNs (and other N_Port parameters) of gone
1445 * target ports. So, our heroic attempt to make things safe
1446 * could be undermined by 'open port' response data tagged with
1447 * obsolete WWPNs. Another reason to monitor potential
1448 * connection closures ourself at least (by interpreting
1449 * incoming ELS' and unsolicited status). It just crosses my
1450 * mind that one should be able to cross-check by means of
1451 * another GID_PN straight after a port has been opened.
1452 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1453 */
c41f8cbd 1454 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1455 if (req->qtcb->bottom.support.els1_length >=
1456 FSF_PLOGI_MIN_LEN) {
c41f8cbd 1457 if (plogi->serv_param.wwpn != port->wwpn)
b98478d7 1458 port->d_id = 0;
c41f8cbd
SS		 1459 else {
1460 port->wwnn = plogi->serv_param.wwnn;
1461 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1462 }
1463 }
1464 break;
1da177e4 1465 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1466 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1467 break;
1468 }
1da177e4
LT		 1469}
1470
c41f8cbd
SS		 1471/**
1472 * zfcp_fsf_open_port - create and send open port request
1473 * @erp_action: pointer to struct zfcp_erp_action
1474 * Returns: 0 on success, error otherwise
1da177e4 1475 */
c41f8cbd 1476int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1477{
44cc76f2 1478 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1479 struct zfcp_adapter *adapter = erp_action->adapter;
1480 struct zfcp_fsf_req *req;
1481 int retval = -EIO;
1482
0406289e 1483 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1484 if (zfcp_fsf_req_sbal_get(adapter))
1485 goto out;
1486
1487 req = zfcp_fsf_req_create(adapter,
1488 FSF_QTCB_OPEN_PORT_WITH_DID,
1489 ZFCP_REQ_AUTO_CLEANUP,
1490 adapter->pool.fsf_req_erp);
025270f0 1491 if (IS_ERR(req)) {
c41f8cbd 1492 retval = PTR_ERR(req);
1da177e4 1493 goto out;
c41f8cbd 1494 }
1da177e4 1495
c41f8cbd 1496 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1497 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1498 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1499
c41f8cbd
SS		 1500 req->handler = zfcp_fsf_open_port_handler;
1501 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1502 req->data = erp_action->port;
1503 req->erp_action = erp_action;
1504 erp_action->fsf_req = req;
c41f8cbd 1505
287ac01a 1506 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1507 retval = zfcp_fsf_req_send(req);
1da177e4 1508 if (retval) {
c41f8cbd 1509 zfcp_fsf_req_free(req);
1da177e4 1510 erp_action->fsf_req = NULL;
1da177e4 1511 }
c41f8cbd 1512out:
0406289e 1513 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1514 return retval;
1515}
1516
c41f8cbd 1517static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1518{
c41f8cbd 1519 struct zfcp_port *port = req->data;
1da177e4 1520
c41f8cbd 1521 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1522 return;
1da177e4 1523
c41f8cbd 1524 switch (req->qtcb->header.fsf_status) {
1da177e4 1525 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1526 zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
1527 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1528 break;
1da177e4 1529 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1530 break;
1da177e4 1531 case FSF_GOOD:
c41f8cbd 1532 zfcp_erp_modify_port_status(port, 33, req,
1da177e4
LT		 1533 ZFCP_STATUS_COMMON_OPEN,
1534 ZFCP_CLEAR);
1da177e4 1535 break;
1da177e4 1536 }
1da177e4
LT		 1537}
1538
c41f8cbd
SS		 1539/**
1540 * zfcp_fsf_close_port - create and send close port request
1541 * @erp_action: pointer to struct zfcp_erp_action
1542 * Returns: 0 on success, error otherwise
1da177e4 1543 */
c41f8cbd 1544int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1545{
44cc76f2 1546 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1547 struct zfcp_adapter *adapter = erp_action->adapter;
1548 struct zfcp_fsf_req *req;
1549 int retval = -EIO;
1550
0406289e 1551 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1552 if (zfcp_fsf_req_sbal_get(adapter))
1553 goto out;
1554
1555 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1556 ZFCP_REQ_AUTO_CLEANUP,
1557 adapter->pool.fsf_req_erp);
025270f0 1558 if (IS_ERR(req)) {
c41f8cbd 1559 retval = PTR_ERR(req);
1da177e4 1560 goto out;
c41f8cbd 1561 }
1da177e4 1562
c41f8cbd 1563 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1564 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1565 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1566
c41f8cbd
SS		 1567 req->handler = zfcp_fsf_close_port_handler;
1568 req->data = erp_action->port;
1569 req->erp_action = erp_action;
1570 req->qtcb->header.port_handle = erp_action->port->handle;
1571 erp_action->fsf_req = req;
c41f8cbd 1572
287ac01a 1573 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1574 retval = zfcp_fsf_req_send(req);
1da177e4 1575 if (retval) {
c41f8cbd 1576 zfcp_fsf_req_free(req);
1da177e4 1577 erp_action->fsf_req = NULL;
1da177e4 1578 }
c41f8cbd 1579out:
0406289e 1580 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1581 return retval;
1582}
1583
5ab944f9
SS		 1584static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1585{
1586 struct zfcp_wka_port *wka_port = req->data;
1587 struct fsf_qtcb_header *header = &req->qtcb->header;
1588
1589 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1590 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1591 goto out;
1592 }
1593
1594 switch (header->fsf_status) {
1595 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1596 dev_warn(&req->adapter->ccw_device->dev,
1597 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1598 case FSF_ADAPTER_STATUS_AVAILABLE:
1599 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1600 case FSF_ACCESS_DENIED:
1601 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1602 break;
1603 case FSF_PORT_ALREADY_OPEN:
1c1cba17 1604 break;
5ab944f9
SS		 1605 case FSF_GOOD:
1606 wka_port->handle = header->port_handle;
1607 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1608 }
1609out:
1610 wake_up(&wka_port->completion_wq);
1611}
1612
1613/**
1614 * zfcp_fsf_open_wka_port - create and send open wka-port request
1615 * @wka_port: pointer to struct zfcp_wka_port
1616 * Returns: 0 on success, error otherwise
1617 */
1618int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1619{
1620 struct qdio_buffer_element *sbale;
1621 struct zfcp_adapter *adapter = wka_port->adapter;
1622 struct zfcp_fsf_req *req;
1623 int retval = -EIO;
1624
0406289e 1625 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1626 if (zfcp_fsf_req_sbal_get(adapter))
1627 goto out;
1628
1629 req = zfcp_fsf_req_create(adapter,
1630 FSF_QTCB_OPEN_PORT_WITH_DID,
1631 ZFCP_REQ_AUTO_CLEANUP,
1632 adapter->pool.fsf_req_erp);
1633 if (unlikely(IS_ERR(req))) {
1634 retval = PTR_ERR(req);
1635 goto out;
1636 }
1637
1638 sbale = zfcp_qdio_sbale_req(req);
1639 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1640 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1641
1642 req->handler = zfcp_fsf_open_wka_port_handler;
1643 req->qtcb->bottom.support.d_id = wka_port->d_id;
1644 req->data = wka_port;
1645
1646 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1647 retval = zfcp_fsf_req_send(req);
1648 if (retval)
1649 zfcp_fsf_req_free(req);
1650out:
0406289e 1651 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1652 return retval;
1653}
1654
1655static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1656{
1657 struct zfcp_wka_port *wka_port = req->data;
1658
1659 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1660 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
41bfcf90 1661 zfcp_erp_adapter_reopen(wka_port->adapter, 0, 84, req);
5ab944f9
SS		 1662 }
1663
1664 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1665 wake_up(&wka_port->completion_wq);
1666}
1667
1668/**
1669 * zfcp_fsf_close_wka_port - create and send close wka port request
1670 * @erp_action: pointer to struct zfcp_erp_action
1671 * Returns: 0 on success, error otherwise
1672 */
1673int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1674{
1675 struct qdio_buffer_element *sbale;
1676 struct zfcp_adapter *adapter = wka_port->adapter;
1677 struct zfcp_fsf_req *req;
1678 int retval = -EIO;
1679
0406289e 1680 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1681 if (zfcp_fsf_req_sbal_get(adapter))
1682 goto out;
1683
1684 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1685 ZFCP_REQ_AUTO_CLEANUP,
1686 adapter->pool.fsf_req_erp);
1687 if (unlikely(IS_ERR(req))) {
1688 retval = PTR_ERR(req);
1689 goto out;
1690 }
1691
1692 sbale = zfcp_qdio_sbale_req(req);
1693 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1694 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1695
1696 req->handler = zfcp_fsf_close_wka_port_handler;
1697 req->data = wka_port;
1698 req->qtcb->header.port_handle = wka_port->handle;
1699
1700 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1701 retval = zfcp_fsf_req_send(req);
1702 if (retval)
1703 zfcp_fsf_req_free(req);
1704out:
0406289e 1705 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1706 return retval;
1707}
1708
c41f8cbd 1709static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1710{
c41f8cbd
SS		 1711 struct zfcp_port *port = req->data;
1712 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1713 struct zfcp_unit *unit;
1da177e4 1714
c41f8cbd 1715 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1716 return;
1da177e4 1717
1da177e4 1718 switch (header->fsf_status) {
1da177e4 1719 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1720 zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
1721 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1722 break;
1da177e4 1723 case FSF_ACCESS_DENIED:
c41f8cbd 1724 zfcp_fsf_access_denied_port(req, port);
1da177e4 1725 break;
1da177e4 1726 case FSF_PORT_BOXED:
c41f8cbd
SS		 1727 zfcp_erp_port_boxed(port, 50, req);
1728 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1729 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 1730 /* can't use generic zfcp_erp_modify_port_status because
1731 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1732 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1733 list_for_each_entry(unit, &port->unit_list_head, list)
1734 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1735 &unit->status);
1da177e4 1736 break;
1da177e4 1737 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1738 switch (header->fsf_status_qual.word[0]) {
1739 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1740 /* fall through */
1da177e4 1741 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1742 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1743 break;
1da177e4
LT		 1744 }
1745 break;
1da177e4 1746 case FSF_GOOD:
1da177e4
LT		 1747 /* can't use generic zfcp_erp_modify_port_status because
1748 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1749 */
1750 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1751 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1752 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1753 &unit->status);
1da177e4 1754 break;
1da177e4 1755 }
1da177e4
LT		 1756}
1757
c41f8cbd
SS		 1758/**
1759 * zfcp_fsf_close_physical_port - close physical port
1760 * @erp_action: pointer to struct zfcp_erp_action
1761 * Returns: 0 on success
1da177e4 1762 */
c41f8cbd 1763int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1764{
44cc76f2 1765 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1766 struct zfcp_adapter *adapter = erp_action->adapter;
1767 struct zfcp_fsf_req *req;
1768 int retval = -EIO;
1769
0406289e 1770 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1771 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1772 goto out;
1da177e4 1773
c41f8cbd
SS		 1774 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1775 ZFCP_REQ_AUTO_CLEANUP,
1776 adapter->pool.fsf_req_erp);
025270f0 1777 if (IS_ERR(req)) {
c41f8cbd
SS		 1778 retval = PTR_ERR(req);
1779 goto out;
1780 }
1da177e4 1781
c41f8cbd
SS		 1782 sbale = zfcp_qdio_sbale_req(req);
1783 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1784 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1785
c41f8cbd
SS		 1786 req->data = erp_action->port;
1787 req->qtcb->header.port_handle = erp_action->port->handle;
1788 req->erp_action = erp_action;
1789 req->handler = zfcp_fsf_close_physical_port_handler;
1790 erp_action->fsf_req = req;
c41f8cbd 1791
287ac01a 1792 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1793 retval = zfcp_fsf_req_send(req);
1da177e4 1794 if (retval) {
c41f8cbd 1795 zfcp_fsf_req_free(req);
1da177e4 1796 erp_action->fsf_req = NULL;
1da177e4 1797 }
c41f8cbd 1798out:
0406289e 1799 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1800 return retval;
1801}
1802
c41f8cbd 1803static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1804{
c41f8cbd
SS		 1805 struct zfcp_adapter *adapter = req->adapter;
1806 struct zfcp_unit *unit = req->data;
1807 struct fsf_qtcb_header *header = &req->qtcb->header;
1808 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1809 struct fsf_queue_designator *queue_designator =
1810 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1811 int exclusive, readwrite;
1da177e4 1812
c41f8cbd 1813 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1814 return;
1da177e4 1815
1da177e4 1816 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1817 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1818 ZFCP_STATUS_UNIT_SHARED |
1819 ZFCP_STATUS_UNIT_READONLY,
1820 &unit->status);
1821
1da177e4
LT		 1822 switch (header->fsf_status) {
1823
1824 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1825 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
1826 /* fall through */
1da177e4 1827 case FSF_LUN_ALREADY_OPEN:
1da177e4 1828 break;
1da177e4 1829 case FSF_ACCESS_DENIED:
c41f8cbd 1830 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1831 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1832 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1833 break;
1da177e4 1834 case FSF_PORT_BOXED:
c41f8cbd
SS		 1835 zfcp_erp_port_boxed(unit->port, 51, req);
1836 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1837 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1838 break;
1da177e4 1839 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1840 if (header->fsf_status_qual.word[0])
553448f6 1841 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1842 "LUN 0x%Lx on port 0x%Lx is already in "
1843 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1844 (unsigned long long)unit->fcp_lun,
1845 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1846 queue_designator->cssid,
1847 queue_designator->hla);
c41f8cbd 1848 else
553448f6
CS		 1849 zfcp_act_eval_err(adapter,
1850 header->fsf_status_qual.word[2]);
c41f8cbd 1851 zfcp_erp_unit_access_denied(unit, 60, req);
1da177e4
LT		 1852 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1853 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1854 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1855 break;
1da177e4 1856 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1857 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1858 "No handle is available for LUN "
1859 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1860 (unsigned long long)unit->fcp_lun,
1861 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1862 zfcp_erp_unit_failed(unit, 34, req);
1863 /* fall through */
1864 case FSF_INVALID_COMMAND_OPTION:
1865 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1866 break;
1da177e4 1867 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1868 switch (header->fsf_status_qual.word[0]) {
1869 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1870 zfcp_test_link(unit->port);
c41f8cbd 1871 /* fall through */
1da177e4 1872 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1873 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1874 break;
1da177e4
LT		 1875 }
1876 break;
1877
1da177e4 1878 case FSF_GOOD:
1da177e4 1879 unit->handle = header->lun_handle;
1da177e4 1880 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1881
1882 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1883 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1884 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1885 exclusive = (bottom->lun_access_info &
1886 FSF_UNIT_ACCESS_EXCLUSIVE);
1887 readwrite = (bottom->lun_access_info &
1888 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1889
1da177e4
LT		 1890 if (!exclusive)
1891 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1892 &unit->status);
1893
1894 if (!readwrite) {
1895 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1896 &unit->status);
c41f8cbd 1897 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1898 "SCSI device at LUN 0x%016Lx on port "
1899 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1900 (unsigned long long)unit->fcp_lun,
1901 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1902 }
1903
1904 if (exclusive && !readwrite) {
c41f8cbd 1905 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1906 "Exclusive read-only access not "
1907 "supported (unit 0x%016Lx, "
1908 "port 0x%016Lx)\n",
7ba58c9c
SS		 1909 (unsigned long long)unit->fcp_lun,
1910 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1911 zfcp_erp_unit_failed(unit, 35, req);
1912 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1913 zfcp_erp_unit_shutdown(unit, 0, 80, req);
1da177e4 1914 } else if (!exclusive && readwrite) {
c41f8cbd 1915 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1916 "Shared read-write access not "
1917 "supported (unit 0x%016Lx, port "
27c3f0a6 1918 "0x%016Lx)\n",
7ba58c9c
SS		 1919 (unsigned long long)unit->fcp_lun,
1920 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 1921 zfcp_erp_unit_failed(unit, 36, req);
1922 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1923 zfcp_erp_unit_shutdown(unit, 0, 81, req);
1da177e4
LT		 1924 }
1925 }
1da177e4 1926 break;
1da177e4 1927 }
1da177e4
LT		 1928}
1929
c41f8cbd
SS		 1930/**
1931 * zfcp_fsf_open_unit - open unit
1932 * @erp_action: pointer to struct zfcp_erp_action
1933 * Returns: 0 on success, error otherwise
1da177e4 1934 */
c41f8cbd 1935int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1936{
44cc76f2 1937 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1938 struct zfcp_adapter *adapter = erp_action->adapter;
1939 struct zfcp_fsf_req *req;
1940 int retval = -EIO;
1941
0406289e 1942 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1943 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1944 goto out;
1da177e4 1945
c41f8cbd
SS		 1946 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1947 ZFCP_REQ_AUTO_CLEANUP,
1948 adapter->pool.fsf_req_erp);
025270f0 1949 if (IS_ERR(req)) {
c41f8cbd
SS		 1950 retval = PTR_ERR(req);
1951 goto out;
1952 }
1953
1954 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1955 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1956 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1957
c41f8cbd
SS		 1958 req->qtcb->header.port_handle = erp_action->port->handle;
1959 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1960 req->handler = zfcp_fsf_open_unit_handler;
1961 req->data = erp_action->unit;
1962 req->erp_action = erp_action;
1963 erp_action->fsf_req = req;
1964
1965 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1966 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1967
287ac01a 1968 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1969 retval = zfcp_fsf_req_send(req);
1da177e4 1970 if (retval) {
c41f8cbd 1971 zfcp_fsf_req_free(req);
1da177e4 1972 erp_action->fsf_req = NULL;
1da177e4 1973 }
c41f8cbd 1974out:
0406289e 1975 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1976 return retval;
1977}
1978
c41f8cbd 1979static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1980{
c41f8cbd 1981 struct zfcp_unit *unit = req->data;
1da177e4 1982
c41f8cbd 1983 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1984 return;
1da177e4 1985
c41f8cbd 1986 switch (req->qtcb->header.fsf_status) {
1da177e4 1987 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd
SS		 1988 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
1989 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1990 break;
1da177e4 1991 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd
SS		 1992 zfcp_erp_port_reopen(unit->port, 0, 111, req);
1993 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1994 break;
1da177e4 1995 case FSF_PORT_BOXED:
c41f8cbd
SS		 1996 zfcp_erp_port_boxed(unit->port, 52, req);
1997 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1998 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1999 break;
1da177e4 2000 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 2001 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 2002 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 2003 zfcp_test_link(unit->port);
c41f8cbd 2004 /* fall through */
1da177e4 2005 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 2006 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2007 break;
2008 }
2009 break;
1da177e4 2010 case FSF_GOOD:
1da177e4 2011 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2012 break;
1da177e4 2013 }
1da177e4
LT		 2014}
2015
2016/**
c41f8cbd
SS		 2017 * zfcp_fsf_close_unit - close zfcp unit
2018 * @erp_action: pointer to struct zfcp_unit
2019 * Returns: 0 on success, error otherwise
1da177e4 2020 */
c41f8cbd 2021int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2022{
44cc76f2 2023 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2024 struct zfcp_adapter *adapter = erp_action->adapter;
2025 struct zfcp_fsf_req *req;
2026 int retval = -EIO;
1da177e4 2027
0406289e 2028 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 2029 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 2030 goto out;
c41f8cbd
SS		 2031 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2032 ZFCP_REQ_AUTO_CLEANUP,
2033 adapter->pool.fsf_req_erp);
025270f0 2034 if (IS_ERR(req)) {
c41f8cbd
SS		 2035 retval = PTR_ERR(req);
2036 goto out;
2037 }
1da177e4 2038
c41f8cbd
SS		 2039 sbale = zfcp_qdio_sbale_req(req);
2040 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2041 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2042
c41f8cbd
SS		 2043 req->qtcb->header.port_handle = erp_action->port->handle;
2044 req->qtcb->header.lun_handle = erp_action->unit->handle;
2045 req->handler = zfcp_fsf_close_unit_handler;
2046 req->data = erp_action->unit;
2047 req->erp_action = erp_action;
2048 erp_action->fsf_req = req;
fdf23452 2049
287ac01a 2050 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2051 retval = zfcp_fsf_req_send(req);
2052 if (retval) {
2053 zfcp_fsf_req_free(req);
2054 erp_action->fsf_req = NULL;
2055 }
2056out:
0406289e 2057 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 2058 return retval;
1da177e4
LT		 2059}
2060
c9615858
CS		 2061static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2062{
2063 lat_rec->sum += lat;
c41f8cbd
SS		 2064 lat_rec->min = min(lat_rec->min, lat);
2065 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2066}
2067
c41f8cbd 2068static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2069{
2070 struct fsf_qual_latency_info *lat_inf;
2071 struct latency_cont *lat;
c41f8cbd 2072 struct zfcp_unit *unit = req->unit;
c9615858 2073
c41f8cbd 2074 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2075
c41f8cbd 2076 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2077 case FSF_DATADIR_READ:
2078 lat = &unit->latencies.read;
2079 break;
2080 case FSF_DATADIR_WRITE:
2081 lat = &unit->latencies.write;
2082 break;
2083 case FSF_DATADIR_CMND:
2084 lat = &unit->latencies.cmd;
2085 break;
2086 default:
2087 return;
2088 }
2089
49f0f01c 2090 spin_lock(&unit->latencies.lock);
c9615858
CS		 2091 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2092 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2093 lat->counter++;
49f0f01c 2094 spin_unlock(&unit->latencies.lock);
1da177e4
LT		 2095}
2096
0997f1c5
SR		 2097#ifdef CONFIG_BLK_DEV_IO_TRACE
2098static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2099{
2100 struct fsf_qual_latency_info *lat_inf;
2101 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2102 struct request *req = scsi_cmnd->request;
2103 struct zfcp_blk_drv_data trace;
2104 int ticks = fsf_req->adapter->timer_ticks;
2105
2106 trace.flags = 0;
2107 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2108 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2109 trace.flags |= ZFCP_BLK_LAT_VALID;
2110 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2111 trace.channel_lat = lat_inf->channel_lat * ticks;
2112 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2113 }
2114 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2115 trace.flags |= ZFCP_BLK_REQ_ERROR;
2116 trace.inb_usage = fsf_req->qdio_inb_usage;
2117 trace.outb_usage = fsf_req->qdio_outb_usage;
2118
2119 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2120}
2121#else
2122static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2123{
2124}
2125#endif
2126
c41f8cbd 2127static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2128{
0ac55aa9 2129 struct scsi_cmnd *scpnt;
1da177e4 2130 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2131 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2132 u32 sns_len;
f76af7d7 2133 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2134 unsigned long flags;
1da177e4 2135
c41f8cbd
SS		 2136 read_lock_irqsave(&req->adapter->abort_lock, flags);
2137
0ac55aa9
SS		 2138 scpnt = req->data;
2139 if (unlikely(!scpnt)) {
2140 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2141 return;
2142 }
2143
c41f8cbd 2144 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2145 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2146 goto skip_fsfstatus;
2147 }
2148
c41f8cbd 2149 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2150 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2151 goto skip_fsfstatus;
2152 }
2153
feac6a07 2154 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2155
1da177e4 2156 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2157
c41f8cbd
SS		 2158 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2159 zfcp_fsf_req_latency(req);
c9615858 2160
0997f1c5
SR		 2161 zfcp_fsf_trace_latency(req);
2162
1da177e4 2163 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2164 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2165 set_host_byte(scpnt, DID_OK);
c41f8cbd 2166 else {
feac6a07 2167 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2168 goto skip_fsfstatus;
1da177e4
LT		 2169 }
2170 }
2171
1da177e4 2172 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2173 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2174 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2175 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2176 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2177
9d058ecf 2178 memcpy(scpnt->sense_buffer,
1da177e4 2179 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2180 }
2181
1da177e4 2182 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2183 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2184 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2185 scpnt->underflow)
feac6a07 2186 set_host_byte(scpnt, DID_ERROR);
1da177e4 2187 }
c41f8cbd 2188skip_fsfstatus:
8a36e453 2189 if (scpnt->result != 0)
c41f8cbd 2190 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
8a36e453 2191 else if (scpnt->retries > 0)
c41f8cbd 2192 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
8a36e453 2193 else
c41f8cbd 2194 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
1da177e4 2195
1da177e4 2196 scpnt->host_scribble = NULL;
1da177e4 2197 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2198 /*
2199 * We must hold this lock until scsi_done has been called.
2200 * Otherwise we may call scsi_done after abort regarding this
2201 * command has completed.
2202 * Note: scsi_done must not block!
2203 */
c41f8cbd 2204 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2205}
2206
c41f8cbd 2207static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2208{
1da177e4 2209 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2210 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2211 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2212
c41f8cbd
SS		 2213 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2214 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2215 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2216}
2217
2218
2219static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2220{
2221 struct zfcp_unit *unit;
2222 struct fsf_qtcb_header *header = &req->qtcb->header;
2223
2224 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2225 unit = req->data;
2226 else
2227 unit = req->unit;
2228
2229 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2230 goto skip_fsfstatus;
1da177e4 2231
c41f8cbd
SS		 2232 switch (header->fsf_status) {
2233 case FSF_HANDLE_MISMATCH:
2234 case FSF_PORT_HANDLE_NOT_VALID:
2235 zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
2236 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2237 break;
2238 case FSF_FCPLUN_NOT_VALID:
2239 case FSF_LUN_HANDLE_NOT_VALID:
2240 zfcp_erp_port_reopen(unit->port, 0, 113, req);
2241 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2242 break;
c41f8cbd
SS		 2243 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2244 zfcp_fsf_class_not_supp(req);
1da177e4 2245 break;
c41f8cbd
SS		 2246 case FSF_ACCESS_DENIED:
2247 zfcp_fsf_access_denied_unit(req, unit);
2248 break;
2249 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2250 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2251 "Incorrect direction %d, unit 0x%016Lx on port "
2252 "0x%016Lx closed\n",
c41f8cbd 2253 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2254 (unsigned long long)unit->fcp_lun,
2255 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2256 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
2257 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2258 break;
2259 case FSF_CMND_LENGTH_NOT_VALID:
2260 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2261 "Incorrect CDB length %d, unit 0x%016Lx on "
2262 "port 0x%016Lx closed\n",
c41f8cbd 2263 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2264 (unsigned long long)unit->fcp_lun,
2265 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2266 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
2267 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2268 break;
2269 case FSF_PORT_BOXED:
2270 zfcp_erp_port_boxed(unit->port, 53, req);
2271 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2272 ZFCP_STATUS_FSFREQ_RETRY;
2273 break;
2274 case FSF_LUN_BOXED:
2275 zfcp_erp_unit_boxed(unit, 54, req);
2276 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2277 ZFCP_STATUS_FSFREQ_RETRY;
2278 break;
2279 case FSF_ADAPTER_STATUS_AVAILABLE:
2280 if (header->fsf_status_qual.word[0] ==
2281 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2282 zfcp_test_link(unit->port);
2283 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2284 break;
1da177e4 2285 }
c41f8cbd
SS		 2286skip_fsfstatus:
2287 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2288 zfcp_fsf_send_fcp_ctm_handler(req);
2289 else {
2290 zfcp_fsf_send_fcp_command_task_handler(req);
2291 req->unit = NULL;
2292 zfcp_unit_put(unit);
2293 }
1da177e4
LT		 2294}
2295
7ba58c9c
SS		 2296static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2297{
2298 u32 *fcp_dl_ptr;
2299
2300 /*
2301 * fcp_dl_addr = start address of fcp_cmnd structure +
2302 * size of fixed part + size of dynamically sized add_dcp_cdb field
2303 * SEE FCP-2 documentation
2304 */
2305 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2306 (fcp_cmd->add_fcp_cdb_length << 2));
2307 *fcp_dl_ptr = fcp_dl;
2308}
2309
c41f8cbd
SS		 2310/**
2311 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
2312 * @adapter: adapter where scsi command is issued
2313 * @unit: unit where command is sent to
2314 * @scsi_cmnd: scsi command to be sent
2315 * @timer: timer to be started when request is initiated
2316 * @req_flags: flags for fsf_request
1da177e4 2317 */
c41f8cbd
SS		 2318int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
2319 struct zfcp_unit *unit,
2320 struct scsi_cmnd *scsi_cmnd,
2321 int use_timer, int req_flags)
1da177e4 2322{
c41f8cbd
SS		 2323 struct zfcp_fsf_req *req;
2324 struct fcp_cmnd_iu *fcp_cmnd_iu;
2325 unsigned int sbtype;
2326 int real_bytes, retval = -EIO;
1da177e4 2327
c41f8cbd
SS		 2328 if (unlikely(!(atomic_read(&unit->status) &
2329 ZFCP_STATUS_COMMON_UNBLOCKED)))
2330 return -EBUSY;
1da177e4 2331
0406289e 2332 spin_lock(&adapter->req_q_lock);
2450d3e7 2333 if (!zfcp_fsf_sbal_available(adapter))
c41f8cbd
SS		 2334 goto out;
2335 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2336 adapter->pool.fsf_req_scsi);
025270f0 2337 if (IS_ERR(req)) {
c41f8cbd
SS		 2338 retval = PTR_ERR(req);
2339 goto out;
2340 }
2341
2342 zfcp_unit_get(unit);
2343 req->unit = unit;
2344 req->data = scsi_cmnd;
2345 req->handler = zfcp_fsf_send_fcp_command_handler;
2346 req->qtcb->header.lun_handle = unit->handle;
2347 req->qtcb->header.port_handle = unit->port->handle;
2348 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2349
2350 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2351
2352 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2353 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2354 /*
2355 * set depending on data direction:
2356 * data direction bits in SBALE (SB Type)
2357 * data direction bits in QTCB
2358 * data direction bits in FCP_CMND IU
2359 */
2360 switch (scsi_cmnd->sc_data_direction) {
2361 case DMA_NONE:
2362 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2363 sbtype = SBAL_FLAGS0_TYPE_READ;
1da177e4 2364 break;
c41f8cbd
SS		 2365 case DMA_FROM_DEVICE:
2366 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2367 sbtype = SBAL_FLAGS0_TYPE_READ;
2368 fcp_cmnd_iu->rddata = 1;
2369 break;
2370 case DMA_TO_DEVICE:
2371 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2372 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2373 fcp_cmnd_iu->wddata = 1;
1da177e4 2374 break;
c41f8cbd 2375 case DMA_BIDIRECTIONAL:
1da177e4 2376 default:
c41f8cbd
SS		 2377 retval = -EIO;
2378 goto failed_scsi_cmnd;
1da177e4
LT		 2379 }
2380
c41f8cbd
SS		 2381 if (likely((scsi_cmnd->device->simple_tags) ||
2382 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2383 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2384 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2385 else
2386 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2387
c41f8cbd
SS		 2388 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2389 fcp_cmnd_iu->add_fcp_cdb_length =
2390 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2391
c41f8cbd 2392 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2393
c41f8cbd 2394 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2395 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2396
c41f8cbd
SS		 2397 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2398 scsi_sglist(scsi_cmnd),
2399 FSF_MAX_SBALS_PER_REQ);
2400 if (unlikely(real_bytes < 0)) {
2401 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2402 retval = -EIO;
2403 else {
2404 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2405 "Oversize data package, unit 0x%016Lx "
2406 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2407 (unsigned long long)unit->fcp_lun,
2408 (unsigned long long)unit->port->wwpn);
c41f8cbd
SS		 2409 zfcp_erp_unit_shutdown(unit, 0, 131, req);
2410 retval = -EINVAL;
2411 }
2412 goto failed_scsi_cmnd;
1da177e4 2413 }
1da177e4 2414
c41f8cbd 2415 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2416
c41f8cbd
SS		 2417 if (use_timer)
2418 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 2419
c41f8cbd
SS		 2420 retval = zfcp_fsf_req_send(req);
2421 if (unlikely(retval))
2422 goto failed_scsi_cmnd;
1da177e4 2423
c41f8cbd 2424 goto out;
1da177e4 2425
c41f8cbd
SS		 2426failed_scsi_cmnd:
2427 zfcp_unit_put(unit);
2428 zfcp_fsf_req_free(req);
2429 scsi_cmnd->host_scribble = NULL;
2430out:
0406289e 2431 spin_unlock(&adapter->req_q_lock);
c41f8cbd 2432 return retval;
1da177e4
LT		 2433}
2434
2435/**
c41f8cbd
SS		 2436 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
2437 * @adapter: pointer to struct zfcp-adapter
2438 * @unit: pointer to struct zfcp_unit
2439 * @tm_flags: unsigned byte for task management flags
2440 * @req_flags: int request flags
2441 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2442 */
c41f8cbd
SS		 2443struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
2444 struct zfcp_unit *unit,
2445 u8 tm_flags, int req_flags)
1da177e4 2446{
44cc76f2 2447 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2448 struct zfcp_fsf_req *req = NULL;
2449 struct fcp_cmnd_iu *fcp_cmnd_iu;
1da177e4 2450
c41f8cbd
SS		 2451 if (unlikely(!(atomic_read(&unit->status) &
2452 ZFCP_STATUS_COMMON_UNBLOCKED)))
2453 return NULL;
1da177e4 2454
92cab0d9
CS		 2455 spin_lock_bh(&adapter->req_q_lock);
2456 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 2457 goto out;
2458 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
2459 adapter->pool.fsf_req_scsi);
633528c3
SS		 2460 if (IS_ERR(req)) {
2461 req = NULL;
c41f8cbd 2462 goto out;
633528c3 2463 }
1da177e4 2464
c41f8cbd
SS		 2465 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2466 req->data = unit;
2467 req->handler = zfcp_fsf_send_fcp_command_handler;
2468 req->qtcb->header.lun_handle = unit->handle;
2469 req->qtcb->header.port_handle = unit->port->handle;
2470 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2471 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2472 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2473 sizeof(u32);
c41f8cbd
SS		 2474
2475 sbale = zfcp_qdio_sbale_req(req);
2476 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2477 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2478
c41f8cbd
SS		 2479 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2480 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2481 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2482
c41f8cbd
SS		 2483 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2484 if (!zfcp_fsf_req_send(req))
2485 goto out;
1da177e4 2486
c41f8cbd
SS		 2487 zfcp_fsf_req_free(req);
2488 req = NULL;
2489out:
92cab0d9 2490 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2491 return req;
2492}
1da177e4 2493
c41f8cbd
SS		 2494static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2495{
2496 if (req->qtcb->header.fsf_status != FSF_GOOD)
2497 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2498}
2499
c41f8cbd
SS		 2500/**
2501 * zfcp_fsf_control_file - control file upload/download
2502 * @adapter: pointer to struct zfcp_adapter
2503 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2504 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2505 */
c41f8cbd
SS		 2506struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2507 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2508{
44cc76f2 2509 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2510 struct zfcp_fsf_req *req = NULL;
2511 struct fsf_qtcb_bottom_support *bottom;
2512 int direction, retval = -EIO, bytes;
2513
2514 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2515 return ERR_PTR(-EOPNOTSUPP);
2516
2517 switch (fsf_cfdc->command) {
2518 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2519 direction = SBAL_FLAGS0_TYPE_WRITE;
2520 break;
2521 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2522 direction = SBAL_FLAGS0_TYPE_READ;
2523 break;
2524 default:
2525 return ERR_PTR(-EINVAL);
2526 }
1da177e4 2527
0406289e 2528 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2529 if (zfcp_fsf_req_sbal_get(adapter))
2530 goto out;
1da177e4 2531
c41f8cbd 2532 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
025270f0 2533 if (IS_ERR(req)) {
c41f8cbd
SS		 2534 retval = -EPERM;
2535 goto out;
2536 }
1da177e4 2537
c41f8cbd 2538 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2539
c41f8cbd
SS		 2540 sbale = zfcp_qdio_sbale_req(req);
2541 sbale[0].flags |= direction;
8a36e453 2542
c41f8cbd
SS		 2543 bottom = &req->qtcb->bottom.support;
2544 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2545 bottom->option = fsf_cfdc->option;
8a36e453 2546
c41f8cbd
SS		 2547 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2548 FSF_MAX_SBALS_PER_REQ);
2549 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2550 retval = -ENOMEM;
2551 zfcp_fsf_req_free(req);
2552 goto out;
2553 }
1da177e4 2554
c41f8cbd
SS		 2555 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2556 retval = zfcp_fsf_req_send(req);
2557out:
0406289e 2558 spin_unlock_bh(&adapter->req_q_lock);
8a36e453 2559
c41f8cbd
SS		 2560 if (!retval) {
2561 wait_event(req->completion_wq,
2562 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2563 return req;
1da177e4 2564 }
c41f8cbd 2565 return ERR_PTR(retval);
1da177e4 2566}
Linux kernel - Deliverables
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