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[SCSI] zfcp: Enable auto-port discovery for NPIV.
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4 1/*
553448f6 2 * zfcp device driver
1da177e4 3 *
553448f6 4 * Implementation of FSF commands.
1da177e4 5 *
a2fa0aed 6 * Copyright IBM Corporation 2002, 2009
1da177e4
LT		 7 */
8
ecf39d42
CS		 9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
0997f1c5 12#include <linux/blktrace_api.h>
1da177e4
LT		 13#include "zfcp_ext.h"
14
63caf367
CS		 15#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
16#define ZFCP_REQ_NO_QTCB 0x00000008
17
287ac01a
CS		 18static void zfcp_fsf_request_timeout_handler(unsigned long data)
19{
20 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
5ffd51a5
SS		 21 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
22 "fsrth_1", NULL);
287ac01a
CS		 23}
24
25static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
26 unsigned long timeout)
27{
28 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
29 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
30 fsf_req->timer.expires = jiffies + timeout;
31 add_timer(&fsf_req->timer);
32}
33
34static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
35{
36 BUG_ON(!fsf_req->erp_action);
37 fsf_req->timer.function = zfcp_erp_timeout_handler;
38 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
39 fsf_req->timer.expires = jiffies + 30 * HZ;
40 add_timer(&fsf_req->timer);
41}
42
1da177e4
LT		 43/* association between FSF command and FSF QTCB type */
44static u32 fsf_qtcb_type[] = {
45 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
46 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
53 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
54 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
55 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
56 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
57 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
58};
59
553448f6
CS		 60static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
61{
c41f8cbd 62 u16 subtable = table >> 16;
553448f6 63 u16 rule = table & 0xffff;
ff3b24fa 64 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
553448f6 65
ff3b24fa 66 if (subtable && subtable < ARRAY_SIZE(act_type))
553448f6 67 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 68 "Access denied according to ACT rule type %s, "
69 "rule %d\n", act_type[subtable], rule);
553448f6
CS		 70}
71
72static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
73 struct zfcp_port *port)
74{
75 struct fsf_qtcb_header *header = &req->qtcb->header;
76 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 77 "Access denied to port 0x%016Lx\n",
7ba58c9c 78 (unsigned long long)port->wwpn);
553448f6
CS		 79 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
80 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
5ffd51a5 81 zfcp_erp_port_access_denied(port, "fspad_1", req);
553448f6
CS		 82 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
83}
84
85static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
86 struct zfcp_unit *unit)
87{
88 struct fsf_qtcb_header *header = &req->qtcb->header;
89 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 90 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 91 (unsigned long long)unit->fcp_lun,
92 (unsigned long long)unit->port->wwpn);
553448f6
CS		 93 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
94 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
5ffd51a5 95 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
553448f6
CS		 96 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
97}
98
99static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
100{
ff3b24fa
CS		 101 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
102 "operational because of an unsupported FC class\n");
5ffd51a5 103 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
553448f6
CS		 104 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
105}
106
c41f8cbd
SS		 107/**
108 * zfcp_fsf_req_free - free memory used by fsf request
109 * @fsf_req: pointer to struct zfcp_fsf_req
1da177e4 110 */
c41f8cbd 111void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
1da177e4 112{
c41f8cbd
SS		 113 if (likely(req->pool)) {
114 mempool_free(req, req->pool);
dd52e0ea
HC		 115 return;
116 }
117
c41f8cbd
SS		 118 if (req->qtcb) {
119 kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
dd52e0ea
HC		 120 return;
121 }
1da177e4
LT		 122}
123
c41f8cbd
SS		 124/**
125 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
126 * @adapter: pointer to struct zfcp_adapter
127 *
869b2b44
MP		 128 * Never ever call this without shutting down the adapter first.
129 * Otherwise the adapter would continue using and corrupting s390 storage.
130 * Included BUG_ON() call to ensure this is done.
131 * ERP is supposed to be the only user of this function.
1da177e4 132 */
6fcc4711 133void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
1da177e4 134{
c41f8cbd 135 struct zfcp_fsf_req *req, *tmp;
fea9d6c7 136 unsigned long flags;
6fcc4711 137 LIST_HEAD(remove_queue);
869b2b44 138 unsigned int i;
fea9d6c7 139
c41f8cbd 140 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
fea9d6c7 141 spin_lock_irqsave(&adapter->req_list_lock, flags);
869b2b44 142 for (i = 0; i < REQUEST_LIST_SIZE; i++)
6fcc4711 143 list_splice_init(&adapter->req_list[i], &remove_queue);
fea9d6c7
VS		 144 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
145
c41f8cbd
SS		 146 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
147 list_del(&req->list);
148 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
149 zfcp_fsf_req_complete(req);
1da177e4 150 }
1da177e4
LT		 151}
152
c41f8cbd 153static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
1da177e4 154{
c41f8cbd
SS		 155 struct fsf_status_read_buffer *sr_buf = req->data;
156 struct zfcp_adapter *adapter = req->adapter;
157 struct zfcp_port *port;
158 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
159 unsigned long flags;
1da177e4 160
c41f8cbd
SS		 161 read_lock_irqsave(&zfcp_data.config_lock, flags);
162 list_for_each_entry(port, &adapter->port_list_head, list)
163 if (port->d_id == d_id) {
164 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
5ffd51a5 165 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
c41f8cbd
SS		 166 return;
167 }
168 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1da177e4
LT		 169}
170
5ffd51a5 171static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
c41f8cbd 172 struct fsf_link_down_info *link_down)
aef4a983 173{
c41f8cbd 174 struct zfcp_adapter *adapter = req->adapter;
698ec016 175
c41f8cbd 176 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
ee69ab7a
MS		 177 return;
178
179 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
a2fa0aed 180 zfcp_scsi_schedule_rports_block(adapter);
ee69ab7a 181
c41f8cbd 182 if (!link_down)
2f8f3ed5 183 goto out;
ee69ab7a 184
aef4a983
MS		 185 switch (link_down->error_code) {
186 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 187 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 188 "There is no light signal from the local "
189 "fibre channel cable\n");
aef4a983
MS		 190 break;
191 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 192 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 193 "There is a wrap plug instead of a fibre "
194 "channel cable\n");
aef4a983
MS		 195 break;
196 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 197 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 198 "The adjacent fibre channel node does not "
199 "support FCP\n");
aef4a983
MS		 200 break;
201 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 202 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 203 "The FCP device is suspended because of a "
204 "firmware update\n");
553448f6 205 break;
aef4a983 206 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 207 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 208 "The FCP device detected a WWPN that is "
209 "duplicate or not valid\n");
aef4a983
MS		 210 break;
211 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 212 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 213 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 214 break;
215 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 216 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 217 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 218 break;
219 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 220 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 221 "The adjacent switch cannot support "
222 "more NPIV ports\n");
aef4a983
MS		 223 break;
224 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 225 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 226 "The FCP adapter could not log in to the "
227 "fibre channel fabric\n");
aef4a983
MS		 228 break;
229 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 230 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 231 "The WWPN assignment file on the FCP adapter "
232 "has been damaged\n");
aef4a983
MS		 233 break;
234 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 235 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 236 "The mode table on the FCP adapter "
237 "has been damaged\n");
aef4a983
MS		 238 break;
239 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 240 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 241 "All NPIV ports on the FCP adapter have "
242 "been assigned\n");
aef4a983
MS		 243 break;
244 default:
c41f8cbd 245 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 246 "The link between the FCP adapter and "
247 "the FC fabric is down\n");
aef4a983 248 }
c41f8cbd
SS		 249out:
250 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 251}
252
c41f8cbd 253static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 254{
c41f8cbd
SS		 255 struct fsf_status_read_buffer *sr_buf = req->data;
256 struct fsf_link_down_info *ldi =
257 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 258
c41f8cbd
SS		 259 switch (sr_buf->status_subtype) {
260 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
5ffd51a5 261 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
1da177e4 262 break;
c41f8cbd 263 case FSF_STATUS_READ_SUB_FDISC_FAILED:
5ffd51a5 264 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
1da177e4 265 break;
c41f8cbd 266 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
5ffd51a5 267 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
c41f8cbd
SS		 268 };
269}
1da177e4 270
c41f8cbd
SS		 271static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
272{
273 struct zfcp_adapter *adapter = req->adapter;
274 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 275
c41f8cbd
SS		 276 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
277 zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
278 mempool_free(sr_buf, adapter->pool.data_status_read);
279 zfcp_fsf_req_free(req);
280 return;
281 }
1da177e4 282
c41f8cbd 283 zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
1da177e4 284
c41f8cbd
SS		 285 switch (sr_buf->status_type) {
286 case FSF_STATUS_READ_PORT_CLOSED:
287 zfcp_fsf_status_read_port_closed(req);
1da177e4 288 break;
c41f8cbd
SS		 289 case FSF_STATUS_READ_INCOMING_ELS:
290 zfcp_fc_incoming_els(req);
1da177e4 291 break;
c41f8cbd 292 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 293 break;
c41f8cbd 294 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 295 dev_warn(&adapter->ccw_device->dev,
296 "The error threshold for checksum statistics "
297 "has been exceeded\n");
57069386 298 zfcp_hba_dbf_event_berr(adapter, req);
1da177e4 299 break;
c41f8cbd
SS		 300 case FSF_STATUS_READ_LINK_DOWN:
301 zfcp_fsf_status_read_link_down(req);
302 break;
303 case FSF_STATUS_READ_LINK_UP:
304 dev_info(&adapter->ccw_device->dev,
ff3b24fa 305 "The local link has been restored\n");
c41f8cbd 306 /* All ports should be marked as ready to run again */
5ffd51a5 307 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
c41f8cbd
SS		 308 ZFCP_STATUS_COMMON_RUNNING,
309 ZFCP_SET);
310 zfcp_erp_adapter_reopen(adapter,
311 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
312 ZFCP_STATUS_COMMON_ERP_FAILED,
5ffd51a5 313 "fssrh_2", req);
c41f8cbd
SS		 314 break;
315 case FSF_STATUS_READ_NOTIFICATION_LOST:
316 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
5ffd51a5
SS		 317 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
318 req);
c41f8cbd
SS		 319 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
320 schedule_work(&adapter->scan_work);
321 break;
322 case FSF_STATUS_READ_CFDC_UPDATED:
5ffd51a5 323 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
c41f8cbd
SS		 324 break;
325 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
326 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 327 break;
1da177e4
LT		 328 }
329
c41f8cbd
SS		 330 mempool_free(sr_buf, adapter->pool.data_status_read);
331 zfcp_fsf_req_free(req);
1da177e4 332
c41f8cbd 333 atomic_inc(&adapter->stat_miss);
b7f15f3c 334 queue_work(zfcp_data.work_queue, &adapter->stat_work);
c41f8cbd 335}
1da177e4 336
c41f8cbd
SS		 337static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
338{
339 switch (req->qtcb->header.fsf_status_qual.word[0]) {
340 case FSF_SQ_FCP_RSP_AVAILABLE:
341 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
342 case FSF_SQ_NO_RETRY_POSSIBLE:
343 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
344 return;
345 case FSF_SQ_COMMAND_ABORTED:
346 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
347 break;
348 case FSF_SQ_NO_RECOM:
349 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 350 "The FCP adapter reported a problem "
351 "that cannot be recovered\n");
5ffd51a5 352 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
c41f8cbd
SS		 353 break;
354 }
355 /* all non-return stats set FSFREQ_ERROR*/
356 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 357}
358
c41f8cbd 359static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 360{
c41f8cbd
SS		 361 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
362 return;
1da177e4 363
c41f8cbd
SS		 364 switch (req->qtcb->header.fsf_status) {
365 case FSF_UNKNOWN_COMMAND:
366 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 367 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd 368 req->qtcb->header.fsf_command);
5ffd51a5 369 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
c41f8cbd
SS		 370 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
371 break;
372 case FSF_ADAPTER_STATUS_AVAILABLE:
373 zfcp_fsf_fsfstatus_qual_eval(req);
374 break;
375 }
376}
1da177e4 377
c41f8cbd
SS		 378static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
379{
380 struct zfcp_adapter *adapter = req->adapter;
381 struct fsf_qtcb *qtcb = req->qtcb;
382 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 383
c41f8cbd 384 zfcp_hba_dbf_event_fsf_response(req);
1da177e4 385
c41f8cbd
SS		 386 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
387 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
388 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
389 return;
390 }
1da177e4 391
c41f8cbd
SS		 392 switch (qtcb->prefix.prot_status) {
393 case FSF_PROT_GOOD:
394 case FSF_PROT_FSF_STATUS_PRESENTED:
395 return;
396 case FSF_PROT_QTCB_VERSION_ERROR:
397 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 398 "QTCB version 0x%x not supported by FCP adapter "
399 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
400 psq->word[0], psq->word[1]);
5ffd51a5 401 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
c41f8cbd
SS		 402 break;
403 case FSF_PROT_ERROR_STATE:
404 case FSF_PROT_SEQ_NUMB_ERROR:
5ffd51a5 405 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
c41f8cbd
SS		 406 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
407 break;
408 case FSF_PROT_UNSUPP_QTCB_TYPE:
409 dev_err(&adapter->ccw_device->dev,
ff3b24fa 410 "The QTCB type is not supported by the FCP adapter\n");
5ffd51a5 411 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
c41f8cbd
SS		 412 break;
413 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
414 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
415 &adapter->status);
416 break;
417 case FSF_PROT_DUPLICATE_REQUEST_ID:
418 dev_err(&adapter->ccw_device->dev,
ff3b24fa 419 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd 420 (unsigned long long)qtcb->bottom.support.req_handle);
5ffd51a5 421 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
c41f8cbd
SS		 422 break;
423 case FSF_PROT_LINK_DOWN:
5ffd51a5
SS		 424 zfcp_fsf_link_down_info_eval(req, "fspse_5",
425 &psq->link_down_info);
c41f8cbd 426 /* FIXME: reopening adapter now? better wait for link up */
5ffd51a5 427 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
c41f8cbd
SS		 428 break;
429 case FSF_PROT_REEST_QUEUE:
430 /* All ports should be marked as ready to run again */
5ffd51a5 431 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
c41f8cbd
SS		 432 ZFCP_STATUS_COMMON_RUNNING,
433 ZFCP_SET);
434 zfcp_erp_adapter_reopen(adapter,
435 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
5ffd51a5
SS		 436 ZFCP_STATUS_COMMON_ERP_FAILED,
437 "fspse_8", req);
c41f8cbd
SS		 438 break;
439 default:
440 dev_err(&adapter->ccw_device->dev,
ff3b24fa 441 "0x%x is not a valid transfer protocol status\n",
c41f8cbd 442 qtcb->prefix.prot_status);
5ffd51a5 443 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
c41f8cbd
SS		 444 }
445 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 446}
447
c41f8cbd
SS		 448/**
449 * zfcp_fsf_req_complete - process completion of a FSF request
450 * @fsf_req: The FSF request that has been completed.
451 *
452 * When a request has been completed either from the FCP adapter,
453 * or it has been dismissed due to a queue shutdown, this function
454 * is called to process the completion status and trigger further
455 * events related to the FSF request.
456 */
457void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
1da177e4 458{
c41f8cbd
SS		 459 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
460 zfcp_fsf_status_read_handler(req);
461 return;
462 }
1da177e4 463
c41f8cbd
SS		 464 del_timer(&req->timer);
465 zfcp_fsf_protstatus_eval(req);
466 zfcp_fsf_fsfstatus_eval(req);
467 req->handler(req);
1da177e4 468
c41f8cbd 469 if (req->erp_action)
287ac01a 470 zfcp_erp_notify(req->erp_action, 0);
c41f8cbd 471 req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
1da177e4 472
c41f8cbd
SS		 473 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
474 zfcp_fsf_req_free(req);
475 else
476 /* notify initiator waiting for the requests completion */
477 /*
478 * FIXME: Race! We must not access fsf_req here as it might have been
479 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
480 * flag. It's an improbable case. But, we have the same paranoia for
481 * the cleanup flag already.
482 * Might better be handled using complete()?
483 * (setting the flag and doing wakeup ought to be atomic
484 * with regard to checking the flag as long as waitqueue is
485 * part of the to be released structure)
486 */
487 wake_up(&req->completion_wq);
488}
1da177e4 489
c41f8cbd
SS		 490static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
491{
492 struct fsf_qtcb_bottom_config *bottom;
493 struct zfcp_adapter *adapter = req->adapter;
494 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 495
c41f8cbd 496 bottom = &req->qtcb->bottom.config;
1da177e4 497
c41f8cbd
SS		 498 if (req->data)
499 memcpy(req->data, bottom, sizeof(*bottom));
500
501 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
502 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
503 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
504 fc_host_speed(shost) = bottom->fc_link_speed;
505 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
506
507 adapter->hydra_version = bottom->adapter_type;
508 adapter->timer_ticks = bottom->timer_interval;
509
510 if (fc_host_permanent_port_name(shost) == -1)
511 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
512
513 switch (bottom->fc_topology) {
514 case FSF_TOPO_P2P:
515 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
516 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
517 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
518 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
c41f8cbd
SS		 519 break;
520 case FSF_TOPO_FABRIC:
521 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
c41f8cbd
SS		 522 break;
523 case FSF_TOPO_AL:
524 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
c41f8cbd 525 default:
c41f8cbd 526 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 527 "Unknown or unsupported arbitrated loop "
528 "fibre channel topology detected\n");
5ffd51a5 529 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
c41f8cbd 530 return -EIO;
1da177e4 531 }
c41f8cbd 532
1da177e4
LT		 533 return 0;
534}
535
c41f8cbd 536static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
553448f6
CS		 537{
538 struct zfcp_adapter *adapter = req->adapter;
c41f8cbd
SS		 539 struct fsf_qtcb *qtcb = req->qtcb;
540 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
541 struct Scsi_Host *shost = adapter->scsi_host;
553448f6 542
c41f8cbd
SS		 543 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
544 return;
1da177e4 545
c41f8cbd
SS		 546 adapter->fsf_lic_version = bottom->lic_version;
547 adapter->adapter_features = bottom->adapter_features;
548 adapter->connection_features = bottom->connection_features;
549 adapter->peer_wwpn = 0;
550 adapter->peer_wwnn = 0;
551 adapter->peer_d_id = 0;
8a36e453 552
c41f8cbd
SS		 553 switch (qtcb->header.fsf_status) {
554 case FSF_GOOD:
555 if (zfcp_fsf_exchange_config_evaluate(req))
556 return;
1da177e4 557
c41f8cbd
SS		 558 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
559 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 560 "FCP adapter maximum QTCB size (%d bytes) "
561 "is too small\n",
562 bottom->max_qtcb_size);
5ffd51a5 563 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
c41f8cbd
SS		 564 return;
565 }
566 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
567 &adapter->status);
1da177e4 568 break;
c41f8cbd
SS		 569 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
570 fc_host_node_name(shost) = 0;
571 fc_host_port_name(shost) = 0;
572 fc_host_port_id(shost) = 0;
573 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
574 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
575 adapter->hydra_version = 0;
1da177e4 576
c41f8cbd
SS		 577 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
578 &adapter->status);
1da177e4 579
5ffd51a5 580 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
c41f8cbd 581 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 582 break;
c41f8cbd 583 default:
5ffd51a5 584 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
c41f8cbd
SS		 585 return;
586 }
1da177e4 587
c41f8cbd
SS		 588 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
589 adapter->hardware_version = bottom->hardware_version;
590 memcpy(fc_host_serial_number(shost), bottom->serial_number,
591 min(FC_SERIAL_NUMBER_SIZE, 17));
592 EBCASC(fc_host_serial_number(shost),
593 min(FC_SERIAL_NUMBER_SIZE, 17));
594 }
1da177e4 595
c41f8cbd
SS		 596 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
597 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 598 "The FCP adapter only supports newer "
599 "control block versions\n");
5ffd51a5 600 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
c41f8cbd
SS		 601 return;
602 }
603 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
604 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 605 "The FCP adapter only supports older "
606 "control block versions\n");
5ffd51a5 607 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
c41f8cbd
SS		 608 }
609}
1da177e4 610
c41f8cbd
SS		 611static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
612{
613 struct zfcp_adapter *adapter = req->adapter;
614 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
615 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 616
c41f8cbd
SS		 617 if (req->data)
618 memcpy(req->data, bottom, sizeof(*bottom));
9eb69aff 619
0282985d 620 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
c41f8cbd 621 fc_host_permanent_port_name(shost) = bottom->wwpn;
0282985d
CS		 622 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
623 } else
c41f8cbd
SS		 624 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
625 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
626 fc_host_supported_speeds(shost) = bottom->supported_speed;
627}
1da177e4 628
c41f8cbd
SS		 629static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
630{
c41f8cbd
SS		 631 struct fsf_qtcb *qtcb = req->qtcb;
632
633 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
634 return;
635
636 switch (qtcb->header.fsf_status) {
637 case FSF_GOOD:
638 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 639 break;
640 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
641 zfcp_fsf_exchange_port_evaluate(req);
5ffd51a5 642 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
c41f8cbd 643 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 644 break;
1da177e4 645 }
c41f8cbd 646}
d26ab06e 647
c41f8cbd 648static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
dedbc2b3
CS		 649 __releases(&adapter->req_q_lock)
650 __acquires(&adapter->req_q_lock)
c41f8cbd 651{
dedbc2b3 652 struct zfcp_qdio_queue *req_q = &adapter->req_q;
c41f8cbd 653 long ret;
c41f8cbd 654
dedbc2b3
CS		 655 if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
656 return -EIO;
657 if (atomic_read(&req_q->count) > 0)
658 return 0;
659
660 atomic_dec(&req_q->count);
0406289e 661 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 662 ret = wait_event_interruptible_timeout(adapter->request_wq,
dedbc2b3
CS		 663 atomic_read(&req_q->count) >= 0,
664 5 * HZ);
665 spin_lock_bh(&adapter->req_q_lock);
666 atomic_inc(&req_q->count);
667
c41f8cbd
SS		 668 if (ret > 0)
669 return 0;
2450d3e7
SR		 670 if (!ret)
671 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd
SS		 672 return -EIO;
673}
674
675static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
676{
677 struct zfcp_fsf_req *req;
678 req = mempool_alloc(pool, GFP_ATOMIC);
679 if (!req)
680 return NULL;
681 memset(req, 0, sizeof(*req));
88f2a977 682 req->pool = pool;
c41f8cbd
SS		 683 return req;
684}
685
686static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
687{
688 struct zfcp_fsf_req_qtcb *qtcb;
689
690 if (likely(pool))
691 qtcb = mempool_alloc(pool, GFP_ATOMIC);
692 else
693 qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
694 GFP_ATOMIC);
695 if (unlikely(!qtcb))
696 return NULL;
697
698 memset(qtcb, 0, sizeof(*qtcb));
699 qtcb->fsf_req.qtcb = &qtcb->qtcb;
700 qtcb->fsf_req.pool = pool;
701
702 return &qtcb->fsf_req;
703}
704
705static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
706 u32 fsf_cmd, int req_flags,
707 mempool_t *pool)
1da177e4 708{
44cc76f2 709 struct qdio_buffer_element *sbale;
1da177e4 710
c41f8cbd
SS		 711 struct zfcp_fsf_req *req;
712 struct zfcp_qdio_queue *req_q = &adapter->req_q;
951f746f 713
c41f8cbd
SS		 714 if (req_flags & ZFCP_REQ_NO_QTCB)
715 req = zfcp_fsf_alloc_noqtcb(pool);
716 else
717 req = zfcp_fsf_alloc_qtcb(pool);
1da177e4 718
c41f8cbd
SS		 719 if (unlikely(!req))
720 return ERR_PTR(-EIO);
1da177e4 721
c41f8cbd
SS		 722 if (adapter->req_no == 0)
723 adapter->req_no++;
1da177e4 724
c41f8cbd
SS		 725 INIT_LIST_HEAD(&req->list);
726 init_timer(&req->timer);
727 init_waitqueue_head(&req->completion_wq);
1da177e4 728
c41f8cbd
SS		 729 req->adapter = adapter;
730 req->fsf_command = fsf_cmd;
52bfb558 731 req->req_id = adapter->req_no;
c41f8cbd
SS		 732 req->sbal_number = 1;
733 req->sbal_first = req_q->first;
734 req->sbal_last = req_q->first;
735 req->sbale_curr = 1;
736
737 sbale = zfcp_qdio_sbale_req(req);
738 sbale[0].addr = (void *) req->req_id;
739 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
740
741 if (likely(req->qtcb)) {
742 req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
743 req->qtcb->prefix.req_id = req->req_id;
744 req->qtcb->prefix.ulp_info = 26;
745 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
746 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
747 req->qtcb->header.req_handle = req->req_id;
748 req->qtcb->header.fsf_command = req->fsf_command;
749 req->seq_no = adapter->fsf_req_seq_no;
750 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
751 sbale[1].addr = (void *) req->qtcb;
752 sbale[1].length = sizeof(struct fsf_qtcb);
753 }
754
755 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
756 zfcp_fsf_req_free(req);
757 return ERR_PTR(-EIO);
758 }
951f746f 759
c41f8cbd
SS		 760 if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
761 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
1da177e4 762
c41f8cbd 763 return req;
1da177e4
LT		 764}
765
c41f8cbd
SS		 766static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
767{
768 struct zfcp_adapter *adapter = req->adapter;
135ea137
MP		 769 unsigned long flags;
770 int idx;
771 int with_qtcb = (req->qtcb != NULL);
c41f8cbd
SS		 772
773 /* put allocated FSF request into hash table */
45316a86 774 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 775 idx = zfcp_reqlist_hash(req->req_id);
776 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 777 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 778
3765138a 779 req->qdio_outb_usage = atomic_read(&adapter->req_q.count);
c41f8cbd
SS		 780 req->issued = get_clock();
781 if (zfcp_qdio_send(req)) {
c41f8cbd 782 del_timer(&req->timer);
3765138a
CS		 783 spin_lock_irqsave(&adapter->req_list_lock, flags);
784 /* lookup request again, list might have changed */
785 if (zfcp_reqlist_find_safe(adapter, req))
786 zfcp_reqlist_remove(adapter, req);
787 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
5ffd51a5 788 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
c41f8cbd
SS		 789 return -EIO;
790 }
791
792 /* Don't increase for unsolicited status */
135ea137 793 if (with_qtcb)
c41f8cbd 794 adapter->fsf_req_seq_no++;
52bfb558 795 adapter->req_no++;
c41f8cbd
SS		 796
797 return 0;
798}
799
800/**
801 * zfcp_fsf_status_read - send status read request
802 * @adapter: pointer to struct zfcp_adapter
803 * @req_flags: request flags
804 * Returns: 0 on success, ERROR otherwise
1da177e4 805 */
c41f8cbd 806int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
1da177e4 807{
c41f8cbd
SS		 808 struct zfcp_fsf_req *req;
809 struct fsf_status_read_buffer *sr_buf;
44cc76f2 810 struct qdio_buffer_element *sbale;
c41f8cbd 811 int retval = -EIO;
1da177e4 812
0406289e 813 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 814 if (zfcp_fsf_req_sbal_get(adapter))
815 goto out;
816
817 req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
818 ZFCP_REQ_NO_QTCB,
819 adapter->pool.fsf_req_status_read);
025270f0 820 if (IS_ERR(req)) {
c41f8cbd
SS		 821 retval = PTR_ERR(req);
822 goto out;
1da177e4
LT		 823 }
824
c41f8cbd
SS		 825 sbale = zfcp_qdio_sbale_req(req);
826 sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
828 req->sbale_curr = 2;
829
830 sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
837 sbale = zfcp_qdio_sbale_curr(req);
838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
059c97d0 840
c41f8cbd
SS		 841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
1da177e4 844
c41f8cbd
SS		 845 goto out;
846
847failed_req_send:
848 mempool_free(sr_buf, adapter->pool.data_status_read);
849failed_buf:
850 zfcp_fsf_req_free(req);
851 zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
852out:
0406289e 853 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 854 return retval;
855}
856
857static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858{
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
1da177e4 866 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 867 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5
SS		 868 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
869 "fsafch1", req);
c41f8cbd 870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 871 }
872 break;
1da177e4 873 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd 874 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5 875 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
c41f8cbd 876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 877 }
878 break;
1da177e4 879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 881 break;
1da177e4 882 case FSF_PORT_BOXED:
5ffd51a5 883 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
c41f8cbd
SS		 884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 886 break;
1da177e4 887 case FSF_LUN_BOXED:
5ffd51a5 888 zfcp_erp_unit_boxed(unit, "fsafch4", req);
c41f8cbd
SS		 889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 891 break;
1da177e4 892 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 893 switch (fsq->word[0]) {
1da177e4 894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 895 zfcp_test_link(unit->port);
1da177e4 896 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 898 break;
1da177e4
LT		 899 }
900 break;
1da177e4 901 case FSF_GOOD:
c41f8cbd 902 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 903 break;
1da177e4 904 }
1da177e4
LT		 905}
906
907/**
c41f8cbd
SS		 908 * zfcp_fsf_abort_fcp_command - abort running SCSI command
909 * @old_req_id: unsigned long
c41f8cbd 910 * @unit: pointer to struct zfcp_unit
c41f8cbd 911 * Returns: pointer to struct zfcp_fsf_req
1da177e4 912 */
1da177e4 913
c41f8cbd 914struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
63caf367 915 struct zfcp_unit *unit)
1da177e4 916{
44cc76f2 917 struct qdio_buffer_element *sbale;
c41f8cbd 918 struct zfcp_fsf_req *req = NULL;
63caf367 919 struct zfcp_adapter *adapter = unit->port->adapter;
8a36e453 920
92cab0d9
CS		 921 spin_lock_bh(&adapter->req_q_lock);
922 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 923 goto out;
924 req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
63caf367 925 0, adapter->pool.fsf_req_abort);
633528c3
SS		 926 if (IS_ERR(req)) {
927 req = NULL;
c41f8cbd 928 goto out;
633528c3 929 }
2abbe866 930
c41f8cbd
SS		 931 if (unlikely(!(atomic_read(&unit->status) &
932 ZFCP_STATUS_COMMON_UNBLOCKED)))
933 goto out_error_free;
1da177e4 934
c41f8cbd
SS		 935 sbale = zfcp_qdio_sbale_req(req);
936 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
937 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 938
c41f8cbd
SS		 939 req->data = unit;
940 req->handler = zfcp_fsf_abort_fcp_command_handler;
941 req->qtcb->header.lun_handle = unit->handle;
942 req->qtcb->header.port_handle = unit->port->handle;
943 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
944
945 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
946 if (!zfcp_fsf_req_send(req))
947 goto out;
948
949out_error_free:
950 zfcp_fsf_req_free(req);
951 req = NULL;
952out:
92cab0d9 953 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 954 return req;
1da177e4
LT		 955}
956
c41f8cbd 957static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 958{
c41f8cbd
SS		 959 struct zfcp_adapter *adapter = req->adapter;
960 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 961 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 962
c41f8cbd 963 send_ct->status = -EINVAL;
1da177e4 964
c41f8cbd 965 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 966 goto skip_fsfstatus;
967
1da177e4 968 switch (header->fsf_status) {
1da177e4 969 case FSF_GOOD:
c41f8cbd
SS		 970 zfcp_san_dbf_event_ct_response(req);
971 send_ct->status = 0;
1da177e4 972 break;
1da177e4 973 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 974 zfcp_fsf_class_not_supp(req);
1da177e4 975 break;
1da177e4 976 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 977 switch (header->fsf_status_qual.word[0]){
978 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 979 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 980 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 981 break;
1da177e4
LT		 982 }
983 break;
1da177e4 984 case FSF_ACCESS_DENIED:
1da177e4 985 break;
1da177e4 986 case FSF_PORT_BOXED:
c41f8cbd
SS		 987 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
988 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 989 break;
c41f8cbd 990 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 991 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
c41f8cbd 992 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 993 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 994 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 995 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 996 case FSF_SBAL_MISMATCH:
c41f8cbd 997 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 998 break;
999 }
1000
1001skip_fsfstatus:
c41f8cbd 1002 if (send_ct->handler)
1da177e4 1003 send_ct->handler(send_ct->handler_data);
c41f8cbd 1004}
1da177e4 1005
39eb7e9a
CS		 1006static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1007 struct scatterlist *sg_req,
1008 struct scatterlist *sg_resp,
1009 int max_sbals)
c41f8cbd 1010{
39eb7e9a
CS		 1011 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req);
1012 u32 feat = req->adapter->adapter_features;
c41f8cbd
SS		 1013 int bytes;
1014
39eb7e9a
CS		 1015 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
1016 if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE ||
1017 !sg_is_last(sg_req) || !sg_is_last(sg_resp))
1018 return -EOPNOTSUPP;
1019
1020 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1021 sbale[2].addr = sg_virt(sg_req);
1022 sbale[2].length = sg_req->length;
1023 sbale[3].addr = sg_virt(sg_resp);
1024 sbale[3].length = sg_resp->length;
1025 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1026 return 0;
1027 }
1028
c41f8cbd
SS		 1029 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1030 sg_req, max_sbals);
1031 if (bytes <= 0)
1032 return -ENOMEM;
1033 req->qtcb->bottom.support.req_buf_length = bytes;
1034 req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1035
1036 bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
1037 sg_resp, max_sbals);
1038 if (bytes <= 0)
1039 return -ENOMEM;
1040 req->qtcb->bottom.support.resp_buf_length = bytes;
1041
1042 return 0;
1da177e4
LT		 1043}
1044
1045/**
c41f8cbd
SS		 1046 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1047 * @ct: pointer to struct zfcp_send_ct with data for request
1048 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1049 * @erp_action: if non-null the Generic Service request sent within ERP
1da177e4 1050 */
c41f8cbd
SS		 1051int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1052 struct zfcp_erp_action *erp_action)
1da177e4 1053{
5ab944f9
SS		 1054 struct zfcp_wka_port *wka_port = ct->wka_port;
1055 struct zfcp_adapter *adapter = wka_port->adapter;
c41f8cbd
SS		 1056 struct zfcp_fsf_req *req;
1057 int ret = -EIO;
1da177e4 1058
0406289e 1059 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1060 if (zfcp_fsf_req_sbal_get(adapter))
1061 goto out;
1da177e4 1062
c41f8cbd
SS		 1063 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1064 ZFCP_REQ_AUTO_CLEANUP, pool);
025270f0 1065 if (IS_ERR(req)) {
c41f8cbd
SS		 1066 ret = PTR_ERR(req);
1067 goto out;
3f0ca62a
CS		 1068 }
1069
39eb7e9a
CS		 1070 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1071 FSF_MAX_SBALS_PER_REQ);
553448f6 1072 if (ret)
1da177e4 1073 goto failed_send;
1da177e4 1074
c41f8cbd 1075 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1076 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1077 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1078 req->qtcb->bottom.support.timeout = ct->timeout;
1079 req->data = ct;
1080
1081 zfcp_san_dbf_event_ct_request(req);
1082
1083 if (erp_action) {
1084 erp_action->fsf_req = req;
1085 req->erp_action = erp_action;
287ac01a 1086 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 1087 } else
1088 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1089
c41f8cbd
SS		 1090 ret = zfcp_fsf_req_send(req);
1091 if (ret)
1092 goto failed_send;
1da177e4 1093
c41f8cbd 1094 goto out;
1da177e4 1095
c41f8cbd
SS		 1096failed_send:
1097 zfcp_fsf_req_free(req);
1098 if (erp_action)
1099 erp_action->fsf_req = NULL;
1100out:
0406289e 1101 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1102 return ret;
1da177e4
LT		 1103}
1104
c41f8cbd 1105static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1106{
c41f8cbd
SS		 1107 struct zfcp_send_els *send_els = req->data;
1108 struct zfcp_port *port = send_els->port;
1109 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1110
c41f8cbd 1111 send_els->status = -EINVAL;
1da177e4 1112
c41f8cbd 1113 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1114 goto skip_fsfstatus;
1115
1116 switch (header->fsf_status) {
1da177e4 1117 case FSF_GOOD:
c41f8cbd
SS		 1118 zfcp_san_dbf_event_els_response(req);
1119 send_els->status = 0;
1da177e4 1120 break;
1da177e4 1121 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1122 zfcp_fsf_class_not_supp(req);
1da177e4 1123 break;
1da177e4 1124 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1125 switch (header->fsf_status_qual.word[0]){
1126 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1127 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1128 zfcp_test_link(port);
c41f8cbd 1129 /*fall through */
1da177e4 1130 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1131 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1132 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1133 break;
1da177e4
LT		 1134 }
1135 break;
1da177e4 1136 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1137 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1138 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1139 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1140 break;
1da177e4 1141 case FSF_ACCESS_DENIED:
c41f8cbd 1142 zfcp_fsf_access_denied_port(req, port);
1da177e4 1143 break;
c41f8cbd
SS		 1144 case FSF_SBAL_MISMATCH:
1145 /* should never occure, avoided in zfcp_fsf_send_els */
1146 /* fall through */
1da177e4 1147 default:
c41f8cbd 1148 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1149 break;
1150 }
1da177e4 1151skip_fsfstatus:
aa551daf 1152 if (send_els->handler)
1da177e4 1153 send_els->handler(send_els->handler_data);
c41f8cbd 1154}
1da177e4 1155
c41f8cbd
SS		 1156/**
1157 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1158 * @els: pointer to struct zfcp_send_els with data for the command
1159 */
1160int zfcp_fsf_send_els(struct zfcp_send_els *els)
1161{
1162 struct zfcp_fsf_req *req;
1163 struct zfcp_adapter *adapter = els->adapter;
1164 struct fsf_qtcb_bottom_support *bottom;
1165 int ret = -EIO;
1166
8fdf30d5
CS		 1167 spin_lock_bh(&adapter->req_q_lock);
1168 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1169 goto out;
1170 req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1171 ZFCP_REQ_AUTO_CLEANUP, NULL);
025270f0 1172 if (IS_ERR(req)) {
c41f8cbd
SS		 1173 ret = PTR_ERR(req);
1174 goto out;
1175 }
1176
39eb7e9a 1177 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
44cc76f2 1178
c41f8cbd
SS		 1179 if (ret)
1180 goto failed_send;
1181
1182 bottom = &req->qtcb->bottom.support;
1183 req->handler = zfcp_fsf_send_els_handler;
1184 bottom->d_id = els->d_id;
1185 bottom->service_class = FSF_CLASS_3;
1186 bottom->timeout = 2 * R_A_TOV;
1187 req->data = els;
1188
1189 zfcp_san_dbf_event_els_request(req);
1190
1191 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1192 ret = zfcp_fsf_req_send(req);
1193 if (ret)
1194 goto failed_send;
1195
1196 goto out;
1197
1198failed_send:
1199 zfcp_fsf_req_free(req);
1200out:
8fdf30d5 1201 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 1202 return ret;
1da177e4
LT		 1203}
1204
c41f8cbd 1205int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1206{
44cc76f2 1207 struct qdio_buffer_element *sbale;
c41f8cbd 1208 struct zfcp_fsf_req *req;
52ef11a7 1209 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd
SS		 1210 int retval = -EIO;
1211
0406289e 1212 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1213 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1214 goto out;
1215 req = zfcp_fsf_req_create(adapter,
1216 FSF_QTCB_EXCHANGE_CONFIG_DATA,
1217 ZFCP_REQ_AUTO_CLEANUP,
1218 adapter->pool.fsf_req_erp);
025270f0 1219 if (IS_ERR(req)) {
c41f8cbd
SS		 1220 retval = PTR_ERR(req);
1221 goto out;
1da177e4
LT		 1222 }
1223
c41f8cbd 1224 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1225 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1226 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1227
c41f8cbd 1228 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1229 FSF_FEATURE_CFDC |
1230 FSF_FEATURE_LUN_SHARING |
9eb69aff 1231 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1232 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1233 req->erp_action = erp_action;
1234 req->handler = zfcp_fsf_exchange_config_data_handler;
1235 erp_action->fsf_req = req;
1da177e4 1236
287ac01a 1237 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1238 retval = zfcp_fsf_req_send(req);
1da177e4 1239 if (retval) {
c41f8cbd 1240 zfcp_fsf_req_free(req);
1da177e4 1241 erp_action->fsf_req = NULL;
1da177e4 1242 }
c41f8cbd 1243out:
0406289e 1244 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1245 return retval;
1246}
1da177e4 1247
c41f8cbd
SS		 1248int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
1249 struct fsf_qtcb_bottom_config *data)
52ef11a7 1250{
44cc76f2 1251 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1252 struct zfcp_fsf_req *req = NULL;
1253 int retval = -EIO;
1254
0406289e 1255 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1256 if (zfcp_fsf_req_sbal_get(adapter))
1257 goto out;
1258
1259 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1260 0, NULL);
025270f0 1261 if (IS_ERR(req)) {
c41f8cbd
SS		 1262 retval = PTR_ERR(req);
1263 goto out;
52ef11a7
SS		 1264 }
1265
c41f8cbd 1266 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1267 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1268 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1269 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1270
c41f8cbd 1271 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1272 FSF_FEATURE_CFDC |
1273 FSF_FEATURE_LUN_SHARING |
1274 FSF_FEATURE_NOTIFICATION_LOST |
1275 FSF_FEATURE_UPDATE_ALERT;
1276
1277 if (data)
c41f8cbd 1278 req->data = data;
52ef11a7 1279
c41f8cbd
SS		 1280 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1281 retval = zfcp_fsf_req_send(req);
1282out:
0406289e 1283 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1284 if (!retval)
c41f8cbd
SS		 1285 wait_event(req->completion_wq,
1286 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
52ef11a7 1287
c41f8cbd 1288 zfcp_fsf_req_free(req);
52ef11a7 1289
1da177e4
LT		 1290 return retval;
1291}
1292
1da177e4
LT		 1293/**
1294 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1295 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1296 * Returns: 0 on success, error otherwise
1da177e4 1297 */
c41f8cbd 1298int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1299{
44cc76f2 1300 struct qdio_buffer_element *sbale;
c41f8cbd 1301 struct zfcp_fsf_req *req;
52ef11a7 1302 struct zfcp_adapter *adapter = erp_action->adapter;
c41f8cbd 1303 int retval = -EIO;
1da177e4 1304
553448f6 1305 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1306 return -EOPNOTSUPP;
1da177e4 1307
0406289e 1308 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1309 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1310 goto out;
1311 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
1312 ZFCP_REQ_AUTO_CLEANUP,
1313 adapter->pool.fsf_req_erp);
025270f0 1314 if (IS_ERR(req)) {
c41f8cbd
SS		 1315 retval = PTR_ERR(req);
1316 goto out;
aef4a983
MS		 1317 }
1318
c41f8cbd 1319 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1320 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1321 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1322
c41f8cbd
SS		 1323 req->handler = zfcp_fsf_exchange_port_data_handler;
1324 req->erp_action = erp_action;
1325 erp_action->fsf_req = req;
52ef11a7 1326
287ac01a 1327 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1328 retval = zfcp_fsf_req_send(req);
1da177e4 1329 if (retval) {
c41f8cbd 1330 zfcp_fsf_req_free(req);
52ef11a7
SS		 1331 erp_action->fsf_req = NULL;
1332 }
c41f8cbd 1333out:
0406289e 1334 spin_unlock_bh(&adapter->req_q_lock);
52ef11a7
SS		 1335 return retval;
1336}
1337
52ef11a7
SS		 1338/**
1339 * zfcp_fsf_exchange_port_data_sync - request information about local port
c41f8cbd
SS		 1340 * @adapter: pointer to struct zfcp_adapter
1341 * @data: pointer to struct fsf_qtcb_bottom_port
1342 * Returns: 0 on success, error otherwise
52ef11a7 1343 */
c41f8cbd
SS		 1344int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
1345 struct fsf_qtcb_bottom_port *data)
52ef11a7 1346{
44cc76f2 1347 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1348 struct zfcp_fsf_req *req = NULL;
1349 int retval = -EIO;
52ef11a7 1350
553448f6 1351 if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1352 return -EOPNOTSUPP;
52ef11a7 1353
0406289e 1354 spin_lock_bh(&adapter->req_q_lock);
92cab0d9 1355 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd
SS		 1356 goto out;
1357
1358 req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
1359 NULL);
025270f0 1360 if (IS_ERR(req)) {
c41f8cbd
SS		 1361 retval = PTR_ERR(req);
1362 goto out;
1da177e4
LT		 1363 }
1364
52ef11a7 1365 if (data)
c41f8cbd 1366 req->data = data;
52ef11a7 1367
c41f8cbd 1368 sbale = zfcp_qdio_sbale_req(req);
52ef11a7
SS		 1369 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1370 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1371
c41f8cbd
SS		 1372 req->handler = zfcp_fsf_exchange_port_data_handler;
1373 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1374 retval = zfcp_fsf_req_send(req);
1375out:
0406289e 1376 spin_unlock_bh(&adapter->req_q_lock);
553448f6 1377 if (!retval)
c41f8cbd
SS		 1378 wait_event(req->completion_wq,
1379 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
1380 zfcp_fsf_req_free(req);
1da177e4 1381
1da177e4
LT		 1382 return retval;
1383}
1384
c41f8cbd 1385static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1386{
c41f8cbd
SS		 1387 struct zfcp_port *port = req->data;
1388 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1389 struct fsf_plogi *plogi;
1da177e4 1390
c41f8cbd 1391 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1392 return;
1da177e4 1393
1da177e4 1394 switch (header->fsf_status) {
1da177e4 1395 case FSF_PORT_ALREADY_OPEN:
1da177e4 1396 break;
1da177e4 1397 case FSF_ACCESS_DENIED:
c41f8cbd 1398 zfcp_fsf_access_denied_port(req, port);
1da177e4 1399 break;
1da177e4 1400 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1401 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1402 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1403 "remote port 0x%016Lx\n",
1404 (unsigned long long)port->wwpn);
5ffd51a5 1405 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1406 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1407 break;
1da177e4 1408 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1409 switch (header->fsf_status_qual.word[0]) {
1410 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1411 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1412 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1413 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1414 break;
1415 }
1416 break;
1da177e4 1417 case FSF_GOOD:
1da177e4 1418 port->handle = header->port_handle;
1da177e4
LT		 1419 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1420 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1421 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1422 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1423 &port->status);
1da177e4
LT		 1424 /* check whether D_ID has changed during open */
1425 /*
1426 * FIXME: This check is not airtight, as the FCP channel does
1427 * not monitor closures of target port connections caused on
1428 * the remote side. Thus, they might miss out on invalidating
1429 * locally cached WWPNs (and other N_Port parameters) of gone
1430 * target ports. So, our heroic attempt to make things safe
1431 * could be undermined by 'open port' response data tagged with
1432 * obsolete WWPNs. Another reason to monitor potential
1433 * connection closures ourself at least (by interpreting
1434 * incoming ELS' and unsolicited status). It just crosses my
1435 * mind that one should be able to cross-check by means of
1436 * another GID_PN straight after a port has been opened.
1437 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1438 */
c41f8cbd 1439 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1440 if (req->qtcb->bottom.support.els1_length >=
1441 FSF_PLOGI_MIN_LEN) {
c41f8cbd 1442 if (plogi->serv_param.wwpn != port->wwpn)
b98478d7 1443 port->d_id = 0;
c41f8cbd
SS		 1444 else {
1445 port->wwnn = plogi->serv_param.wwnn;
1446 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1447 }
1448 }
1449 break;
1da177e4 1450 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1451 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1452 break;
1453 }
1da177e4
LT		 1454}
1455
c41f8cbd
SS		 1456/**
1457 * zfcp_fsf_open_port - create and send open port request
1458 * @erp_action: pointer to struct zfcp_erp_action
1459 * Returns: 0 on success, error otherwise
1da177e4 1460 */
c41f8cbd 1461int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1462{
44cc76f2 1463 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1464 struct zfcp_adapter *adapter = erp_action->adapter;
1465 struct zfcp_fsf_req *req;
1466 int retval = -EIO;
1467
0406289e 1468 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1469 if (zfcp_fsf_req_sbal_get(adapter))
1470 goto out;
1471
1472 req = zfcp_fsf_req_create(adapter,
1473 FSF_QTCB_OPEN_PORT_WITH_DID,
1474 ZFCP_REQ_AUTO_CLEANUP,
1475 adapter->pool.fsf_req_erp);
025270f0 1476 if (IS_ERR(req)) {
c41f8cbd 1477 retval = PTR_ERR(req);
1da177e4 1478 goto out;
c41f8cbd 1479 }
1da177e4 1480
c41f8cbd 1481 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1482 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1483 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1484
c41f8cbd
SS		 1485 req->handler = zfcp_fsf_open_port_handler;
1486 req->qtcb->bottom.support.d_id = erp_action->port->d_id;
1487 req->data = erp_action->port;
1488 req->erp_action = erp_action;
1489 erp_action->fsf_req = req;
c41f8cbd 1490
287ac01a 1491 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1492 retval = zfcp_fsf_req_send(req);
1da177e4 1493 if (retval) {
c41f8cbd 1494 zfcp_fsf_req_free(req);
1da177e4 1495 erp_action->fsf_req = NULL;
1da177e4 1496 }
c41f8cbd 1497out:
0406289e 1498 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1499 return retval;
1500}
1501
c41f8cbd 1502static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1503{
c41f8cbd 1504 struct zfcp_port *port = req->data;
1da177e4 1505
c41f8cbd 1506 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1507 return;
1da177e4 1508
c41f8cbd 1509 switch (req->qtcb->header.fsf_status) {
1da177e4 1510 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1511 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1512 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1513 break;
1da177e4 1514 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1515 break;
1da177e4 1516 case FSF_GOOD:
5ffd51a5 1517 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1518 ZFCP_STATUS_COMMON_OPEN,
1519 ZFCP_CLEAR);
1da177e4 1520 break;
1da177e4 1521 }
1da177e4
LT		 1522}
1523
c41f8cbd
SS		 1524/**
1525 * zfcp_fsf_close_port - create and send close port request
1526 * @erp_action: pointer to struct zfcp_erp_action
1527 * Returns: 0 on success, error otherwise
1da177e4 1528 */
c41f8cbd 1529int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1530{
44cc76f2 1531 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1532 struct zfcp_adapter *adapter = erp_action->adapter;
1533 struct zfcp_fsf_req *req;
1534 int retval = -EIO;
1535
0406289e 1536 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 1537 if (zfcp_fsf_req_sbal_get(adapter))
1538 goto out;
1539
1540 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1541 ZFCP_REQ_AUTO_CLEANUP,
1542 adapter->pool.fsf_req_erp);
025270f0 1543 if (IS_ERR(req)) {
c41f8cbd 1544 retval = PTR_ERR(req);
1da177e4 1545 goto out;
c41f8cbd 1546 }
1da177e4 1547
c41f8cbd 1548 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1549 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1550 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1551
c41f8cbd
SS		 1552 req->handler = zfcp_fsf_close_port_handler;
1553 req->data = erp_action->port;
1554 req->erp_action = erp_action;
1555 req->qtcb->header.port_handle = erp_action->port->handle;
1556 erp_action->fsf_req = req;
c41f8cbd 1557
287ac01a 1558 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1559 retval = zfcp_fsf_req_send(req);
1da177e4 1560 if (retval) {
c41f8cbd 1561 zfcp_fsf_req_free(req);
1da177e4 1562 erp_action->fsf_req = NULL;
1da177e4 1563 }
c41f8cbd 1564out:
0406289e 1565 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1566 return retval;
1567}
1568
5ab944f9
SS		 1569static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1570{
1571 struct zfcp_wka_port *wka_port = req->data;
1572 struct fsf_qtcb_header *header = &req->qtcb->header;
1573
1574 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1575 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1576 goto out;
1577 }
1578
1579 switch (header->fsf_status) {
1580 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1581 dev_warn(&req->adapter->ccw_device->dev,
1582 "Opening WKA port 0x%x failed\n", wka_port->d_id);
1583 case FSF_ADAPTER_STATUS_AVAILABLE:
1584 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1585 case FSF_ACCESS_DENIED:
1586 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1587 break;
1588 case FSF_PORT_ALREADY_OPEN:
1c1cba17 1589 break;
5ab944f9
SS		 1590 case FSF_GOOD:
1591 wka_port->handle = header->port_handle;
1592 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1593 }
1594out:
1595 wake_up(&wka_port->completion_wq);
1596}
1597
1598/**
1599 * zfcp_fsf_open_wka_port - create and send open wka-port request
1600 * @wka_port: pointer to struct zfcp_wka_port
1601 * Returns: 0 on success, error otherwise
1602 */
1603int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1604{
1605 struct qdio_buffer_element *sbale;
1606 struct zfcp_adapter *adapter = wka_port->adapter;
1607 struct zfcp_fsf_req *req;
1608 int retval = -EIO;
1609
0406289e 1610 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1611 if (zfcp_fsf_req_sbal_get(adapter))
1612 goto out;
1613
1614 req = zfcp_fsf_req_create(adapter,
1615 FSF_QTCB_OPEN_PORT_WITH_DID,
1616 ZFCP_REQ_AUTO_CLEANUP,
1617 adapter->pool.fsf_req_erp);
1618 if (unlikely(IS_ERR(req))) {
1619 retval = PTR_ERR(req);
1620 goto out;
1621 }
1622
1623 sbale = zfcp_qdio_sbale_req(req);
1624 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1625 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1626
1627 req->handler = zfcp_fsf_open_wka_port_handler;
1628 req->qtcb->bottom.support.d_id = wka_port->d_id;
1629 req->data = wka_port;
1630
1631 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1632 retval = zfcp_fsf_req_send(req);
1633 if (retval)
1634 zfcp_fsf_req_free(req);
1635out:
0406289e 1636 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1637 return retval;
1638}
1639
1640static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1641{
1642 struct zfcp_wka_port *wka_port = req->data;
1643
1644 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1645 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1646 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1647 }
1648
1649 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1650 wake_up(&wka_port->completion_wq);
1651}
1652
1653/**
1654 * zfcp_fsf_close_wka_port - create and send close wka port request
1655 * @erp_action: pointer to struct zfcp_erp_action
1656 * Returns: 0 on success, error otherwise
1657 */
1658int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1659{
1660 struct qdio_buffer_element *sbale;
1661 struct zfcp_adapter *adapter = wka_port->adapter;
1662 struct zfcp_fsf_req *req;
1663 int retval = -EIO;
1664
0406289e 1665 spin_lock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1666 if (zfcp_fsf_req_sbal_get(adapter))
1667 goto out;
1668
1669 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
1670 ZFCP_REQ_AUTO_CLEANUP,
1671 adapter->pool.fsf_req_erp);
1672 if (unlikely(IS_ERR(req))) {
1673 retval = PTR_ERR(req);
1674 goto out;
1675 }
1676
1677 sbale = zfcp_qdio_sbale_req(req);
1678 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1679 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1680
1681 req->handler = zfcp_fsf_close_wka_port_handler;
1682 req->data = wka_port;
1683 req->qtcb->header.port_handle = wka_port->handle;
1684
1685 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1686 retval = zfcp_fsf_req_send(req);
1687 if (retval)
1688 zfcp_fsf_req_free(req);
1689out:
0406289e 1690 spin_unlock_bh(&adapter->req_q_lock);
5ab944f9
SS		 1691 return retval;
1692}
1693
c41f8cbd 1694static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1695{
c41f8cbd
SS		 1696 struct zfcp_port *port = req->data;
1697 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1698 struct zfcp_unit *unit;
1da177e4 1699
c41f8cbd 1700 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1701 return;
1da177e4 1702
1da177e4 1703 switch (header->fsf_status) {
1da177e4 1704 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1705 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1706 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1707 break;
1da177e4 1708 case FSF_ACCESS_DENIED:
c41f8cbd 1709 zfcp_fsf_access_denied_port(req, port);
1da177e4 1710 break;
1da177e4 1711 case FSF_PORT_BOXED:
5ffd51a5 1712 zfcp_erp_port_boxed(port, "fscpph2", req);
c41f8cbd
SS		 1713 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1714 ZFCP_STATUS_FSFREQ_RETRY;
5c815d15
CS		 1715 /* can't use generic zfcp_erp_modify_port_status because
1716 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1717 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1718 list_for_each_entry(unit, &port->unit_list_head, list)
1719 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1720 &unit->status);
1da177e4 1721 break;
1da177e4 1722 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1723 switch (header->fsf_status_qual.word[0]) {
1724 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1725 /* fall through */
1da177e4 1726 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1727 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1728 break;
1da177e4
LT		 1729 }
1730 break;
1da177e4 1731 case FSF_GOOD:
1da177e4
LT		 1732 /* can't use generic zfcp_erp_modify_port_status because
1733 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1734 */
1735 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1736 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1737 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1738 &unit->status);
1da177e4 1739 break;
1da177e4 1740 }
1da177e4
LT		 1741}
1742
c41f8cbd
SS		 1743/**
1744 * zfcp_fsf_close_physical_port - close physical port
1745 * @erp_action: pointer to struct zfcp_erp_action
1746 * Returns: 0 on success
1da177e4 1747 */
c41f8cbd 1748int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1749{
44cc76f2 1750 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1751 struct zfcp_adapter *adapter = erp_action->adapter;
1752 struct zfcp_fsf_req *req;
1753 int retval = -EIO;
1754
0406289e 1755 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1756 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1757 goto out;
1da177e4 1758
c41f8cbd
SS		 1759 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1760 ZFCP_REQ_AUTO_CLEANUP,
1761 adapter->pool.fsf_req_erp);
025270f0 1762 if (IS_ERR(req)) {
c41f8cbd
SS		 1763 retval = PTR_ERR(req);
1764 goto out;
1765 }
1da177e4 1766
c41f8cbd
SS		 1767 sbale = zfcp_qdio_sbale_req(req);
1768 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1769 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1770
c41f8cbd
SS		 1771 req->data = erp_action->port;
1772 req->qtcb->header.port_handle = erp_action->port->handle;
1773 req->erp_action = erp_action;
1774 req->handler = zfcp_fsf_close_physical_port_handler;
1775 erp_action->fsf_req = req;
c41f8cbd 1776
287ac01a 1777 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1778 retval = zfcp_fsf_req_send(req);
1da177e4 1779 if (retval) {
c41f8cbd 1780 zfcp_fsf_req_free(req);
1da177e4 1781 erp_action->fsf_req = NULL;
1da177e4 1782 }
c41f8cbd 1783out:
0406289e 1784 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1785 return retval;
1786}
1787
c41f8cbd 1788static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1789{
c41f8cbd
SS		 1790 struct zfcp_adapter *adapter = req->adapter;
1791 struct zfcp_unit *unit = req->data;
1792 struct fsf_qtcb_header *header = &req->qtcb->header;
1793 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1794 struct fsf_queue_designator *queue_designator =
1795 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1796 int exclusive, readwrite;
1da177e4 1797
c41f8cbd 1798 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1799 return;
1da177e4 1800
1da177e4 1801 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1802 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1803 ZFCP_STATUS_UNIT_SHARED |
1804 ZFCP_STATUS_UNIT_READONLY,
1805 &unit->status);
1806
1da177e4
LT		 1807 switch (header->fsf_status) {
1808
1809 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1810 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1811 /* fall through */
1da177e4 1812 case FSF_LUN_ALREADY_OPEN:
1da177e4 1813 break;
1da177e4 1814 case FSF_ACCESS_DENIED:
c41f8cbd 1815 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1816 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1817 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1818 break;
1da177e4 1819 case FSF_PORT_BOXED:
5ffd51a5 1820 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1821 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1822 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1823 break;
1da177e4 1824 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1825 if (header->fsf_status_qual.word[0])
553448f6 1826 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1827 "LUN 0x%Lx on port 0x%Lx is already in "
1828 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1829 (unsigned long long)unit->fcp_lun,
1830 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1831 queue_designator->cssid,
1832 queue_designator->hla);
c41f8cbd 1833 else
553448f6
CS		 1834 zfcp_act_eval_err(adapter,
1835 header->fsf_status_qual.word[2]);
5ffd51a5 1836 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1837 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1838 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1839 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1840 break;
1da177e4 1841 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1842 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1843 "No handle is available for LUN "
1844 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1845 (unsigned long long)unit->fcp_lun,
1846 (unsigned long long)unit->port->wwpn);
5ffd51a5 1847 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1848 /* fall through */
1849 case FSF_INVALID_COMMAND_OPTION:
1850 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1851 break;
1da177e4 1852 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1853 switch (header->fsf_status_qual.word[0]) {
1854 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1855 zfcp_test_link(unit->port);
c41f8cbd 1856 /* fall through */
1da177e4 1857 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1858 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1859 break;
1da177e4
LT		 1860 }
1861 break;
1862
1da177e4 1863 case FSF_GOOD:
1da177e4 1864 unit->handle = header->lun_handle;
1da177e4 1865 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1866
1867 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1868 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
1869 (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) {
1870 exclusive = (bottom->lun_access_info &
1871 FSF_UNIT_ACCESS_EXCLUSIVE);
1872 readwrite = (bottom->lun_access_info &
1873 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1874
1da177e4
LT		 1875 if (!exclusive)
1876 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1877 &unit->status);
1878
1879 if (!readwrite) {
1880 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1881 &unit->status);
c41f8cbd 1882 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1883 "SCSI device at LUN 0x%016Lx on port "
1884 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1885 (unsigned long long)unit->fcp_lun,
1886 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1887 }
1888
1889 if (exclusive && !readwrite) {
c41f8cbd 1890 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1891 "Exclusive read-only access not "
1892 "supported (unit 0x%016Lx, "
1893 "port 0x%016Lx)\n",
7ba58c9c
SS		 1894 (unsigned long long)unit->fcp_lun,
1895 (unsigned long long)unit->port->wwpn);
5ffd51a5 1896 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1897 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1898 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1899 } else if (!exclusive && readwrite) {
c41f8cbd 1900 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1901 "Shared read-write access not "
1902 "supported (unit 0x%016Lx, port "
27c3f0a6 1903 "0x%016Lx)\n",
7ba58c9c
SS		 1904 (unsigned long long)unit->fcp_lun,
1905 (unsigned long long)unit->port->wwpn);
5ffd51a5 1906 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1908 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1909 }
1910 }
1da177e4 1911 break;
1da177e4 1912 }
1da177e4
LT		 1913}
1914
c41f8cbd
SS		 1915/**
1916 * zfcp_fsf_open_unit - open unit
1917 * @erp_action: pointer to struct zfcp_erp_action
1918 * Returns: 0 on success, error otherwise
1da177e4 1919 */
c41f8cbd 1920int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1921{
44cc76f2 1922 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1923 struct zfcp_adapter *adapter = erp_action->adapter;
1924 struct zfcp_fsf_req *req;
1925 int retval = -EIO;
1926
0406289e 1927 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 1928 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 1929 goto out;
1da177e4 1930
c41f8cbd
SS		 1931 req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
1932 ZFCP_REQ_AUTO_CLEANUP,
1933 adapter->pool.fsf_req_erp);
025270f0 1934 if (IS_ERR(req)) {
c41f8cbd
SS		 1935 retval = PTR_ERR(req);
1936 goto out;
1937 }
1938
1939 sbale = zfcp_qdio_sbale_req(req);
1da177e4
LT		 1940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1942
c41f8cbd
SS		 1943 req->qtcb->header.port_handle = erp_action->port->handle;
1944 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1945 req->handler = zfcp_fsf_open_unit_handler;
1946 req->data = erp_action->unit;
1947 req->erp_action = erp_action;
1948 erp_action->fsf_req = req;
1949
1950 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1951 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1952
287ac01a 1953 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1954 retval = zfcp_fsf_req_send(req);
1da177e4 1955 if (retval) {
c41f8cbd 1956 zfcp_fsf_req_free(req);
1da177e4 1957 erp_action->fsf_req = NULL;
1da177e4 1958 }
c41f8cbd 1959out:
0406289e 1960 spin_unlock_bh(&adapter->req_q_lock);
1da177e4
LT		 1961 return retval;
1962}
1963
c41f8cbd 1964static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1965{
c41f8cbd 1966 struct zfcp_unit *unit = req->data;
1da177e4 1967
c41f8cbd 1968 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1969 return;
1da177e4 1970
c41f8cbd 1971 switch (req->qtcb->header.fsf_status) {
1da177e4 1972 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1973 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 1974 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1975 break;
1da177e4 1976 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 1977 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 1978 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1979 break;
1da177e4 1980 case FSF_PORT_BOXED:
5ffd51a5 1981 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 1982 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1983 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1984 break;
1da177e4 1985 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 1986 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 1987 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1988 zfcp_test_link(unit->port);
c41f8cbd 1989 /* fall through */
1da177e4 1990 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1991 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1992 break;
1993 }
1994 break;
1da177e4 1995 case FSF_GOOD:
1da177e4 1996 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 1997 break;
1da177e4 1998 }
1da177e4
LT		 1999}
2000
2001/**
c41f8cbd
SS		 2002 * zfcp_fsf_close_unit - close zfcp unit
2003 * @erp_action: pointer to struct zfcp_unit
2004 * Returns: 0 on success, error otherwise
1da177e4 2005 */
c41f8cbd 2006int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2007{
44cc76f2 2008 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2009 struct zfcp_adapter *adapter = erp_action->adapter;
2010 struct zfcp_fsf_req *req;
2011 int retval = -EIO;
1da177e4 2012
0406289e 2013 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd 2014 if (zfcp_fsf_req_sbal_get(adapter))
1da177e4 2015 goto out;
c41f8cbd
SS		 2016 req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
2017 ZFCP_REQ_AUTO_CLEANUP,
2018 adapter->pool.fsf_req_erp);
025270f0 2019 if (IS_ERR(req)) {
c41f8cbd
SS		 2020 retval = PTR_ERR(req);
2021 goto out;
2022 }
1da177e4 2023
c41f8cbd
SS		 2024 sbale = zfcp_qdio_sbale_req(req);
2025 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2026 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2027
c41f8cbd
SS		 2028 req->qtcb->header.port_handle = erp_action->port->handle;
2029 req->qtcb->header.lun_handle = erp_action->unit->handle;
2030 req->handler = zfcp_fsf_close_unit_handler;
2031 req->data = erp_action->unit;
2032 req->erp_action = erp_action;
2033 erp_action->fsf_req = req;
fdf23452 2034
287ac01a 2035 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2036 retval = zfcp_fsf_req_send(req);
2037 if (retval) {
2038 zfcp_fsf_req_free(req);
2039 erp_action->fsf_req = NULL;
2040 }
2041out:
0406289e 2042 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd 2043 return retval;
1da177e4
LT		 2044}
2045
c9615858
CS		 2046static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2047{
2048 lat_rec->sum += lat;
c41f8cbd
SS		 2049 lat_rec->min = min(lat_rec->min, lat);
2050 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2051}
2052
c41f8cbd 2053static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2054{
2055 struct fsf_qual_latency_info *lat_inf;
2056 struct latency_cont *lat;
c41f8cbd 2057 struct zfcp_unit *unit = req->unit;
c9615858 2058
c41f8cbd 2059 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2060
c41f8cbd 2061 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2062 case FSF_DATADIR_READ:
2063 lat = &unit->latencies.read;
2064 break;
2065 case FSF_DATADIR_WRITE:
2066 lat = &unit->latencies.write;
2067 break;
2068 case FSF_DATADIR_CMND:
2069 lat = &unit->latencies.cmd;
2070 break;
2071 default:
2072 return;
2073 }
2074
49f0f01c 2075 spin_lock(&unit->latencies.lock);
c9615858
CS		 2076 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2077 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2078 lat->counter++;
49f0f01c 2079 spin_unlock(&unit->latencies.lock);
1da177e4
LT		 2080}
2081
0997f1c5
SR		 2082#ifdef CONFIG_BLK_DEV_IO_TRACE
2083static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2084{
2085 struct fsf_qual_latency_info *lat_inf;
2086 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2087 struct request *req = scsi_cmnd->request;
2088 struct zfcp_blk_drv_data trace;
2089 int ticks = fsf_req->adapter->timer_ticks;
2090
2091 trace.flags = 0;
2092 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2093 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2094 trace.flags |= ZFCP_BLK_LAT_VALID;
2095 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2096 trace.channel_lat = lat_inf->channel_lat * ticks;
2097 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2098 }
2099 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2100 trace.flags |= ZFCP_BLK_REQ_ERROR;
2101 trace.inb_usage = fsf_req->qdio_inb_usage;
2102 trace.outb_usage = fsf_req->qdio_outb_usage;
2103
2104 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2105}
2106#else
2107static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2108{
2109}
2110#endif
2111
c41f8cbd 2112static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2113{
0ac55aa9 2114 struct scsi_cmnd *scpnt;
1da177e4 2115 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2116 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2117 u32 sns_len;
f76af7d7 2118 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2119 unsigned long flags;
1da177e4 2120
c41f8cbd
SS		 2121 read_lock_irqsave(&req->adapter->abort_lock, flags);
2122
0ac55aa9
SS		 2123 scpnt = req->data;
2124 if (unlikely(!scpnt)) {
2125 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2126 return;
2127 }
2128
c41f8cbd 2129 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2130 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2131 goto skip_fsfstatus;
2132 }
2133
c41f8cbd 2134 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2135 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2136 goto skip_fsfstatus;
2137 }
2138
feac6a07 2139 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2140
1da177e4 2141 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2142
c41f8cbd
SS		 2143 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2144 zfcp_fsf_req_latency(req);
c9615858 2145
0997f1c5
SR		 2146 zfcp_fsf_trace_latency(req);
2147
1da177e4 2148 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2149 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2150 set_host_byte(scpnt, DID_OK);
c41f8cbd 2151 else {
feac6a07 2152 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2153 goto skip_fsfstatus;
1da177e4
LT		 2154 }
2155 }
2156
1da177e4 2157 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2158 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2159 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2160 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2161 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2162
9d058ecf 2163 memcpy(scpnt->sense_buffer,
1da177e4 2164 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2165 }
2166
1da177e4 2167 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2168 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2169 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2170 scpnt->underflow)
feac6a07 2171 set_host_byte(scpnt, DID_ERROR);
1da177e4 2172 }
c41f8cbd 2173skip_fsfstatus:
8a36e453 2174 if (scpnt->result != 0)
c41f8cbd 2175 zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
8a36e453 2176 else if (scpnt->retries > 0)
c41f8cbd 2177 zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
8a36e453 2178 else
c41f8cbd 2179 zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
1da177e4 2180
1da177e4 2181 scpnt->host_scribble = NULL;
1da177e4 2182 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2183 /*
2184 * We must hold this lock until scsi_done has been called.
2185 * Otherwise we may call scsi_done after abort regarding this
2186 * command has completed.
2187 * Note: scsi_done must not block!
2188 */
c41f8cbd 2189 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2190}
2191
c41f8cbd 2192static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2193{
1da177e4 2194 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2195 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2196 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2197
c41f8cbd
SS		 2198 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2199 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2200 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2201}
2202
2203
2204static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2205{
2206 struct zfcp_unit *unit;
2207 struct fsf_qtcb_header *header = &req->qtcb->header;
2208
2209 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2210 unit = req->data;
2211 else
2212 unit = req->unit;
2213
2214 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2215 goto skip_fsfstatus;
1da177e4 2216
c41f8cbd
SS		 2217 switch (header->fsf_status) {
2218 case FSF_HANDLE_MISMATCH:
2219 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2220 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2221 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2222 break;
2223 case FSF_FCPLUN_NOT_VALID:
2224 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2225 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2226 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2227 break;
c41f8cbd
SS		 2228 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2229 zfcp_fsf_class_not_supp(req);
1da177e4 2230 break;
c41f8cbd
SS		 2231 case FSF_ACCESS_DENIED:
2232 zfcp_fsf_access_denied_unit(req, unit);
2233 break;
2234 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2235 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2236 "Incorrect direction %d, unit 0x%016Lx on port "
2237 "0x%016Lx closed\n",
c41f8cbd 2238 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2239 (unsigned long long)unit->fcp_lun,
2240 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2241 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2242 req);
c41f8cbd
SS		 2243 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2244 break;
2245 case FSF_CMND_LENGTH_NOT_VALID:
2246 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2247 "Incorrect CDB length %d, unit 0x%016Lx on "
2248 "port 0x%016Lx closed\n",
c41f8cbd 2249 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2250 (unsigned long long)unit->fcp_lun,
2251 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2252 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2253 req);
c41f8cbd
SS		 2254 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2255 break;
2256 case FSF_PORT_BOXED:
5ffd51a5 2257 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2258 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2259 ZFCP_STATUS_FSFREQ_RETRY;
2260 break;
2261 case FSF_LUN_BOXED:
5ffd51a5 2262 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2263 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2264 ZFCP_STATUS_FSFREQ_RETRY;
2265 break;
2266 case FSF_ADAPTER_STATUS_AVAILABLE:
2267 if (header->fsf_status_qual.word[0] ==
2268 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2269 zfcp_test_link(unit->port);
2270 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2271 break;
1da177e4 2272 }
c41f8cbd
SS		 2273skip_fsfstatus:
2274 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2275 zfcp_fsf_send_fcp_ctm_handler(req);
2276 else {
2277 zfcp_fsf_send_fcp_command_task_handler(req);
2278 req->unit = NULL;
2279 zfcp_unit_put(unit);
2280 }
1da177e4
LT		 2281}
2282
7ba58c9c
SS		 2283static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2284{
2285 u32 *fcp_dl_ptr;
2286
2287 /*
2288 * fcp_dl_addr = start address of fcp_cmnd structure +
2289 * size of fixed part + size of dynamically sized add_dcp_cdb field
2290 * SEE FCP-2 documentation
2291 */
2292 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2293 (fcp_cmd->add_fcp_cdb_length << 2));
2294 *fcp_dl_ptr = fcp_dl;
2295}
2296
c41f8cbd
SS		 2297/**
2298 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2299 * @unit: unit where command is sent to
2300 * @scsi_cmnd: scsi command to be sent
1da177e4 2301 */
63caf367
CS		 2302int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2303 struct scsi_cmnd *scsi_cmnd)
1da177e4 2304{
c41f8cbd
SS		 2305 struct zfcp_fsf_req *req;
2306 struct fcp_cmnd_iu *fcp_cmnd_iu;
2307 unsigned int sbtype;
2308 int real_bytes, retval = -EIO;
63caf367 2309 struct zfcp_adapter *adapter = unit->port->adapter;
1da177e4 2310
c41f8cbd
SS		 2311 if (unlikely(!(atomic_read(&unit->status) &
2312 ZFCP_STATUS_COMMON_UNBLOCKED)))
2313 return -EBUSY;
1da177e4 2314
0406289e 2315 spin_lock(&adapter->req_q_lock);
8fdf30d5
CS		 2316 if (atomic_read(&adapter->req_q.count) <= 0) {
2317 atomic_inc(&adapter->qdio_outb_full);
c41f8cbd 2318 goto out;
8fdf30d5 2319 }
63caf367
CS		 2320 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
2321 ZFCP_REQ_AUTO_CLEANUP,
c41f8cbd 2322 adapter->pool.fsf_req_scsi);
025270f0 2323 if (IS_ERR(req)) {
c41f8cbd
SS		 2324 retval = PTR_ERR(req);
2325 goto out;
2326 }
2327
2328 zfcp_unit_get(unit);
2329 req->unit = unit;
2330 req->data = scsi_cmnd;
2331 req->handler = zfcp_fsf_send_fcp_command_handler;
2332 req->qtcb->header.lun_handle = unit->handle;
2333 req->qtcb->header.port_handle = unit->port->handle;
2334 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2335
2336 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2337
2338 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2339 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2340 /*
2341 * set depending on data direction:
2342 * data direction bits in SBALE (SB Type)
2343 * data direction bits in QTCB
2344 * data direction bits in FCP_CMND IU
2345 */
2346 switch (scsi_cmnd->sc_data_direction) {
2347 case DMA_NONE:
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2349 sbtype = SBAL_FLAGS0_TYPE_READ;
1da177e4 2350 break;
c41f8cbd
SS		 2351 case DMA_FROM_DEVICE:
2352 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
2353 sbtype = SBAL_FLAGS0_TYPE_READ;
2354 fcp_cmnd_iu->rddata = 1;
2355 break;
2356 case DMA_TO_DEVICE:
2357 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2358 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2359 fcp_cmnd_iu->wddata = 1;
1da177e4 2360 break;
c41f8cbd 2361 case DMA_BIDIRECTIONAL:
1da177e4 2362 default:
c41f8cbd
SS		 2363 retval = -EIO;
2364 goto failed_scsi_cmnd;
1da177e4
LT		 2365 }
2366
c41f8cbd
SS		 2367 if (likely((scsi_cmnd->device->simple_tags) ||
2368 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2369 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2370 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2371 else
2372 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2373
c41f8cbd
SS		 2374 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2375 fcp_cmnd_iu->add_fcp_cdb_length =
2376 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2377
c41f8cbd 2378 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2379
c41f8cbd 2380 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2381 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2382
c41f8cbd
SS		 2383 real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
2384 scsi_sglist(scsi_cmnd),
2385 FSF_MAX_SBALS_PER_REQ);
2386 if (unlikely(real_bytes < 0)) {
2387 if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
2388 retval = -EIO;
2389 else {
2390 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2391 "Oversize data package, unit 0x%016Lx "
2392 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2393 (unsigned long long)unit->fcp_lun,
2394 (unsigned long long)unit->port->wwpn);
5ffd51a5 2395 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2396 retval = -EINVAL;
2397 }
2398 goto failed_scsi_cmnd;
1da177e4 2399 }
1da177e4 2400
c41f8cbd 2401 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2402
c41f8cbd
SS		 2403 retval = zfcp_fsf_req_send(req);
2404 if (unlikely(retval))
2405 goto failed_scsi_cmnd;
1da177e4 2406
c41f8cbd 2407 goto out;
1da177e4 2408
c41f8cbd
SS		 2409failed_scsi_cmnd:
2410 zfcp_unit_put(unit);
2411 zfcp_fsf_req_free(req);
2412 scsi_cmnd->host_scribble = NULL;
2413out:
0406289e 2414 spin_unlock(&adapter->req_q_lock);
c41f8cbd 2415 return retval;
1da177e4
LT		 2416}
2417
2418/**
c41f8cbd 2419 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2420 * @unit: pointer to struct zfcp_unit
2421 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2422 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2423 */
63caf367 2424struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2425{
44cc76f2 2426 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2427 struct zfcp_fsf_req *req = NULL;
2428 struct fcp_cmnd_iu *fcp_cmnd_iu;
63caf367 2429 struct zfcp_adapter *adapter = unit->port->adapter;
1da177e4 2430
c41f8cbd
SS		 2431 if (unlikely(!(atomic_read(&unit->status) &
2432 ZFCP_STATUS_COMMON_UNBLOCKED)))
2433 return NULL;
1da177e4 2434
92cab0d9
CS		 2435 spin_lock_bh(&adapter->req_q_lock);
2436 if (zfcp_fsf_req_sbal_get(adapter))
c41f8cbd 2437 goto out;
63caf367 2438 req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
c41f8cbd 2439 adapter->pool.fsf_req_scsi);
633528c3
SS		 2440 if (IS_ERR(req)) {
2441 req = NULL;
c41f8cbd 2442 goto out;
633528c3 2443 }
1da177e4 2444
c41f8cbd
SS		 2445 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2446 req->data = unit;
2447 req->handler = zfcp_fsf_send_fcp_command_handler;
2448 req->qtcb->header.lun_handle = unit->handle;
2449 req->qtcb->header.port_handle = unit->port->handle;
2450 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2451 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2452 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2453 sizeof(u32);
c41f8cbd
SS		 2454
2455 sbale = zfcp_qdio_sbale_req(req);
2456 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2457 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2458
c41f8cbd
SS		 2459 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2460 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2461 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2462
c41f8cbd
SS		 2463 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2464 if (!zfcp_fsf_req_send(req))
2465 goto out;
1da177e4 2466
c41f8cbd
SS		 2467 zfcp_fsf_req_free(req);
2468 req = NULL;
2469out:
92cab0d9 2470 spin_unlock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2471 return req;
2472}
1da177e4 2473
c41f8cbd
SS		 2474static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2475{
2476 if (req->qtcb->header.fsf_status != FSF_GOOD)
2477 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2478}
2479
c41f8cbd
SS		 2480/**
2481 * zfcp_fsf_control_file - control file upload/download
2482 * @adapter: pointer to struct zfcp_adapter
2483 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2484 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2485 */
c41f8cbd
SS		 2486struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2487 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2488{
44cc76f2 2489 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2490 struct zfcp_fsf_req *req = NULL;
2491 struct fsf_qtcb_bottom_support *bottom;
2492 int direction, retval = -EIO, bytes;
2493
2494 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2495 return ERR_PTR(-EOPNOTSUPP);
2496
2497 switch (fsf_cfdc->command) {
2498 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2499 direction = SBAL_FLAGS0_TYPE_WRITE;
2500 break;
2501 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2502 direction = SBAL_FLAGS0_TYPE_READ;
2503 break;
2504 default:
2505 return ERR_PTR(-EINVAL);
2506 }
1da177e4 2507
0406289e 2508 spin_lock_bh(&adapter->req_q_lock);
c41f8cbd
SS		 2509 if (zfcp_fsf_req_sbal_get(adapter))
2510 goto out;
1da177e4 2511
c41f8cbd 2512 req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
025270f0 2513 if (IS_ERR(req)) {
c41f8cbd
SS		 2514 retval = -EPERM;
2515 goto out;
2516 }
1da177e4 2517
c41f8cbd 2518 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2519
c41f8cbd
SS		 2520 sbale = zfcp_qdio_sbale_req(req);
2521 sbale[0].flags |= direction;
8a36e453 2522
c41f8cbd
SS		 2523 bottom = &req->qtcb->bottom.support;
2524 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2525 bottom->option = fsf_cfdc->option;
8a36e453 2526
c41f8cbd
SS		 2527 bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
2528 FSF_MAX_SBALS_PER_REQ);
2529 if (bytes != ZFCP_CFDC_MAX_SIZE) {
2530 retval = -ENOMEM;
2531 zfcp_fsf_req_free(req);
2532 goto out;
2533 }
1da177e4 2534
c41f8cbd
SS		 2535 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2536 retval = zfcp_fsf_req_send(req);
2537out:
0406289e 2538 spin_unlock_bh(&adapter->req_q_lock);
8a36e453 2539
c41f8cbd
SS		 2540 if (!retval) {
2541 wait_event(req->completion_wq,
2542 req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2543 return req;
1da177e4 2544 }
c41f8cbd 2545 return ERR_PTR(retval);
1da177e4 2546}
Linux kernel - Deliverables
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