projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] zfcp: Move WKA port to zfcp FC code
[linux-2.6-block.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>
9d05ce2c 13#include <scsi/fc/fc_els.h>
1da177e4 14#include "zfcp_ext.h"
4318e08c 15#include "zfcp_fc.h"
dcd20e23 16#include "zfcp_dbf.h"
1da177e4 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 113 if (likely(req->pool)) {
a4623c46
SS		 114 if (likely(req->qtcb))
115 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
c41f8cbd 116 mempool_free(req, req->pool);
dd52e0ea
HC		 117 return;
118 }
119
a4623c46
SS		 120 if (likely(req->qtcb))
121 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
122 kfree(req);
1da177e4
LT		 123}
124
c41f8cbd 125static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
1da177e4 126{
ecf0c772 127 unsigned long flags;
c41f8cbd
SS		 128 struct fsf_status_read_buffer *sr_buf = req->data;
129 struct zfcp_adapter *adapter = req->adapter;
130 struct zfcp_port *port;
131 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
1da177e4 132
ecf0c772
SS		 133 read_lock_irqsave(&adapter->port_list_lock, flags);
134 list_for_each_entry(port, &adapter->port_list, list)
c41f8cbd 135 if (port->d_id == d_id) {
5ffd51a5 136 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
ecf0c772 137 break;
c41f8cbd 138 }
ecf0c772 139 read_unlock_irqrestore(&adapter->port_list_lock, flags);
1da177e4
LT		 140}
141
5ffd51a5 142static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
c41f8cbd 143 struct fsf_link_down_info *link_down)
aef4a983 144{
c41f8cbd 145 struct zfcp_adapter *adapter = req->adapter;
698ec016 146
c41f8cbd 147 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
ee69ab7a
MS		 148 return;
149
150 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
70932935 151
a2fa0aed 152 zfcp_scsi_schedule_rports_block(adapter);
ee69ab7a 153
c41f8cbd 154 if (!link_down)
2f8f3ed5 155 goto out;
ee69ab7a 156
aef4a983
MS		 157 switch (link_down->error_code) {
158 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 159 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 160 "There is no light signal from the local "
161 "fibre channel cable\n");
aef4a983
MS		 162 break;
163 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 164 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 165 "There is a wrap plug instead of a fibre "
166 "channel cable\n");
aef4a983
MS		 167 break;
168 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 169 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 170 "The adjacent fibre channel node does not "
171 "support FCP\n");
aef4a983
MS		 172 break;
173 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 174 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 175 "The FCP device is suspended because of a "
176 "firmware update\n");
553448f6 177 break;
aef4a983 178 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 179 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 180 "The FCP device detected a WWPN that is "
181 "duplicate or not valid\n");
aef4a983
MS		 182 break;
183 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 184 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 185 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 186 break;
187 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 188 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 189 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 190 break;
191 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 192 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 193 "The adjacent switch cannot support "
194 "more NPIV ports\n");
aef4a983
MS		 195 break;
196 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 197 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 198 "The FCP adapter could not log in to the "
199 "fibre channel fabric\n");
aef4a983
MS		 200 break;
201 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 202 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 203 "The WWPN assignment file on the FCP adapter "
204 "has been damaged\n");
aef4a983
MS		 205 break;
206 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 207 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 208 "The mode table on the FCP adapter "
209 "has been damaged\n");
aef4a983
MS		 210 break;
211 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 212 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 213 "All NPIV ports on the FCP adapter have "
214 "been assigned\n");
aef4a983
MS		 215 break;
216 default:
c41f8cbd 217 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 218 "The link between the FCP adapter and "
219 "the FC fabric is down\n");
aef4a983 220 }
c41f8cbd
SS		 221out:
222 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 223}
224
c41f8cbd 225static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 226{
c41f8cbd
SS		 227 struct fsf_status_read_buffer *sr_buf = req->data;
228 struct fsf_link_down_info *ldi =
229 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 230
c41f8cbd
SS		 231 switch (sr_buf->status_subtype) {
232 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
5ffd51a5 233 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
1da177e4 234 break;
c41f8cbd 235 case FSF_STATUS_READ_SUB_FDISC_FAILED:
5ffd51a5 236 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
1da177e4 237 break;
c41f8cbd 238 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
5ffd51a5 239 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
c41f8cbd
SS		 240 };
241}
1da177e4 242
c41f8cbd
SS		 243static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
244{
245 struct zfcp_adapter *adapter = req->adapter;
246 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 247
c41f8cbd 248 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
5771710b 249 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
a4623c46 250 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd
SS		 251 zfcp_fsf_req_free(req);
252 return;
253 }
1da177e4 254
5771710b 255 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
1da177e4 256
c41f8cbd
SS		 257 switch (sr_buf->status_type) {
258 case FSF_STATUS_READ_PORT_CLOSED:
259 zfcp_fsf_status_read_port_closed(req);
1da177e4 260 break;
c41f8cbd
SS		 261 case FSF_STATUS_READ_INCOMING_ELS:
262 zfcp_fc_incoming_els(req);
1da177e4 263 break;
c41f8cbd 264 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 265 break;
c41f8cbd 266 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 267 dev_warn(&adapter->ccw_device->dev,
268 "The error threshold for checksum statistics "
269 "has been exceeded\n");
5771710b 270 zfcp_dbf_hba_berr(adapter->dbf, req);
1da177e4 271 break;
c41f8cbd
SS		 272 case FSF_STATUS_READ_LINK_DOWN:
273 zfcp_fsf_status_read_link_down(req);
274 break;
275 case FSF_STATUS_READ_LINK_UP:
276 dev_info(&adapter->ccw_device->dev,
ff3b24fa 277 "The local link has been restored\n");
c41f8cbd 278 /* All ports should be marked as ready to run again */
5ffd51a5 279 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
c41f8cbd
SS		 280 ZFCP_STATUS_COMMON_RUNNING,
281 ZFCP_SET);
282 zfcp_erp_adapter_reopen(adapter,
283 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
284 ZFCP_STATUS_COMMON_ERP_FAILED,
5ffd51a5 285 "fssrh_2", req);
c41f8cbd
SS		 286 break;
287 case FSF_STATUS_READ_NOTIFICATION_LOST:
288 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
5ffd51a5
SS		 289 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
290 req);
c41f8cbd 291 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
9eae07ef 292 queue_work(adapter->work_queue, &adapter->scan_work);
c41f8cbd
SS		 293 break;
294 case FSF_STATUS_READ_CFDC_UPDATED:
5ffd51a5 295 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
c41f8cbd
SS		 296 break;
297 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
298 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 299 break;
1da177e4
LT		 300 }
301
a4623c46 302 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd 303 zfcp_fsf_req_free(req);
1da177e4 304
c41f8cbd 305 atomic_inc(&adapter->stat_miss);
4544683a 306 queue_work(adapter->work_queue, &adapter->stat_work);
c41f8cbd 307}
1da177e4 308
c41f8cbd
SS		 309static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
310{
311 switch (req->qtcb->header.fsf_status_qual.word[0]) {
312 case FSF_SQ_FCP_RSP_AVAILABLE:
313 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
314 case FSF_SQ_NO_RETRY_POSSIBLE:
315 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
316 return;
317 case FSF_SQ_COMMAND_ABORTED:
318 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
319 break;
320 case FSF_SQ_NO_RECOM:
321 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 322 "The FCP adapter reported a problem "
323 "that cannot be recovered\n");
5ffd51a5 324 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
c41f8cbd
SS		 325 break;
326 }
327 /* all non-return stats set FSFREQ_ERROR*/
328 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 329}
330
c41f8cbd 331static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 332{
c41f8cbd
SS		 333 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
334 return;
1da177e4 335
c41f8cbd
SS		 336 switch (req->qtcb->header.fsf_status) {
337 case FSF_UNKNOWN_COMMAND:
338 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 339 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd 340 req->qtcb->header.fsf_command);
5ffd51a5 341 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
c41f8cbd
SS		 342 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
343 break;
344 case FSF_ADAPTER_STATUS_AVAILABLE:
345 zfcp_fsf_fsfstatus_qual_eval(req);
346 break;
347 }
348}
1da177e4 349
c41f8cbd
SS		 350static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
351{
352 struct zfcp_adapter *adapter = req->adapter;
353 struct fsf_qtcb *qtcb = req->qtcb;
354 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 355
5771710b 356 zfcp_dbf_hba_fsf_response(req);
1da177e4 357
c41f8cbd
SS		 358 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
359 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
360 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
361 return;
362 }
1da177e4 363
c41f8cbd
SS		 364 switch (qtcb->prefix.prot_status) {
365 case FSF_PROT_GOOD:
366 case FSF_PROT_FSF_STATUS_PRESENTED:
367 return;
368 case FSF_PROT_QTCB_VERSION_ERROR:
369 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 370 "QTCB version 0x%x not supported by FCP adapter "
371 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
372 psq->word[0], psq->word[1]);
5ffd51a5 373 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
c41f8cbd
SS		 374 break;
375 case FSF_PROT_ERROR_STATE:
376 case FSF_PROT_SEQ_NUMB_ERROR:
5ffd51a5 377 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
c41f8cbd
SS		 378 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
379 break;
380 case FSF_PROT_UNSUPP_QTCB_TYPE:
381 dev_err(&adapter->ccw_device->dev,
ff3b24fa 382 "The QTCB type is not supported by the FCP adapter\n");
5ffd51a5 383 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
c41f8cbd
SS		 384 break;
385 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
386 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
387 &adapter->status);
388 break;
389 case FSF_PROT_DUPLICATE_REQUEST_ID:
390 dev_err(&adapter->ccw_device->dev,
ff3b24fa 391 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd 392 (unsigned long long)qtcb->bottom.support.req_handle);
5ffd51a5 393 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
c41f8cbd
SS		 394 break;
395 case FSF_PROT_LINK_DOWN:
5ffd51a5
SS		 396 zfcp_fsf_link_down_info_eval(req, "fspse_5",
397 &psq->link_down_info);
c41f8cbd 398 /* FIXME: reopening adapter now? better wait for link up */
5ffd51a5 399 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
c41f8cbd
SS		 400 break;
401 case FSF_PROT_REEST_QUEUE:
402 /* All ports should be marked as ready to run again */
5ffd51a5 403 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
c41f8cbd
SS		 404 ZFCP_STATUS_COMMON_RUNNING,
405 ZFCP_SET);
406 zfcp_erp_adapter_reopen(adapter,
407 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
5ffd51a5
SS		 408 ZFCP_STATUS_COMMON_ERP_FAILED,
409 "fspse_8", req);
c41f8cbd
SS		 410 break;
411 default:
412 dev_err(&adapter->ccw_device->dev,
ff3b24fa 413 "0x%x is not a valid transfer protocol status\n",
c41f8cbd 414 qtcb->prefix.prot_status);
5ffd51a5 415 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
c41f8cbd
SS		 416 }
417 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 418}
419
c41f8cbd
SS		 420/**
421 * zfcp_fsf_req_complete - process completion of a FSF request
422 * @fsf_req: The FSF request that has been completed.
423 *
424 * When a request has been completed either from the FCP adapter,
425 * or it has been dismissed due to a queue shutdown, this function
426 * is called to process the completion status and trigger further
427 * events related to the FSF request.
428 */
bd63eaf4 429static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
1da177e4 430{
c41f8cbd
SS		 431 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
432 zfcp_fsf_status_read_handler(req);
433 return;
434 }
1da177e4 435
c41f8cbd
SS		 436 del_timer(&req->timer);
437 zfcp_fsf_protstatus_eval(req);
438 zfcp_fsf_fsfstatus_eval(req);
439 req->handler(req);
1da177e4 440
c41f8cbd 441 if (req->erp_action)
287ac01a 442 zfcp_erp_notify(req->erp_action, 0);
1da177e4 443
c41f8cbd
SS		 444 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
445 zfcp_fsf_req_free(req);
446 else
058b8647 447 complete(&req->completion);
c41f8cbd 448}
1da177e4 449
bd63eaf4
SS		 450/**
451 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
452 * @adapter: pointer to struct zfcp_adapter
453 *
454 * Never ever call this without shutting down the adapter first.
455 * Otherwise the adapter would continue using and corrupting s390 storage.
456 * Included BUG_ON() call to ensure this is done.
457 * ERP is supposed to be the only user of this function.
458 */
459void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
460{
461 struct zfcp_fsf_req *req, *tmp;
462 unsigned long flags;
463 LIST_HEAD(remove_queue);
464 unsigned int i;
465
466 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
467 spin_lock_irqsave(&adapter->req_list_lock, flags);
468 for (i = 0; i < REQUEST_LIST_SIZE; i++)
469 list_splice_init(&adapter->req_list[i], &remove_queue);
470 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
471
472 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
473 list_del(&req->list);
474 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
475 zfcp_fsf_req_complete(req);
476 }
477}
478
c41f8cbd
SS		 479static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
480{
9d05ce2c 481 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config;
c41f8cbd
SS		 482 struct zfcp_adapter *adapter = req->adapter;
483 struct Scsi_Host *shost = adapter->scsi_host;
9d05ce2c 484 struct fc_els_flogi *nsp, *plogi;
1da177e4 485
9d05ce2c
CS		 486 /* adjust pointers for missing command code */
487 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param
488 - sizeof(u32));
489 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload
490 - sizeof(u32));
1da177e4 491
c41f8cbd
SS		 492 if (req->data)
493 memcpy(req->data, bottom, sizeof(*bottom));
494
9d05ce2c
CS		 495 fc_host_port_name(shost) = nsp->fl_wwpn;
496 fc_host_node_name(shost) = nsp->fl_wwnn;
c41f8cbd
SS		 497 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
498 fc_host_speed(shost) = bottom->fc_link_speed;
499 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
500
501 adapter->hydra_version = bottom->adapter_type;
502 adapter->timer_ticks = bottom->timer_interval;
503
504 if (fc_host_permanent_port_name(shost) == -1)
505 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
506
507 switch (bottom->fc_topology) {
508 case FSF_TOPO_P2P:
509 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
9d05ce2c
CS		 510 adapter->peer_wwpn = plogi->fl_wwpn;
511 adapter->peer_wwnn = plogi->fl_wwnn;
c41f8cbd 512 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
c41f8cbd
SS		 513 break;
514 case FSF_TOPO_FABRIC:
515 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
c41f8cbd
SS		 516 break;
517 case FSF_TOPO_AL:
518 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
dceab655 519 /* fall through */
c41f8cbd 520 default:
c41f8cbd 521 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 522 "Unknown or unsupported arbitrated loop "
523 "fibre channel topology detected\n");
5ffd51a5 524 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
c41f8cbd 525 return -EIO;
1da177e4 526 }
c41f8cbd 527
1da177e4
LT		 528 return 0;
529}
530
c41f8cbd 531static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
553448f6
CS		 532{
533 struct zfcp_adapter *adapter = req->adapter;
c41f8cbd
SS		 534 struct fsf_qtcb *qtcb = req->qtcb;
535 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
536 struct Scsi_Host *shost = adapter->scsi_host;
553448f6 537
c41f8cbd
SS		 538 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
539 return;
1da177e4 540
c41f8cbd
SS		 541 adapter->fsf_lic_version = bottom->lic_version;
542 adapter->adapter_features = bottom->adapter_features;
543 adapter->connection_features = bottom->connection_features;
544 adapter->peer_wwpn = 0;
545 adapter->peer_wwnn = 0;
546 adapter->peer_d_id = 0;
8a36e453 547
c41f8cbd
SS		 548 switch (qtcb->header.fsf_status) {
549 case FSF_GOOD:
550 if (zfcp_fsf_exchange_config_evaluate(req))
551 return;
1da177e4 552
c41f8cbd
SS		 553 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
554 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 555 "FCP adapter maximum QTCB size (%d bytes) "
556 "is too small\n",
557 bottom->max_qtcb_size);
5ffd51a5 558 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
c41f8cbd
SS		 559 return;
560 }
561 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
562 &adapter->status);
1da177e4 563 break;
c41f8cbd
SS		 564 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
565 fc_host_node_name(shost) = 0;
566 fc_host_port_name(shost) = 0;
567 fc_host_port_id(shost) = 0;
568 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
569 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
570 adapter->hydra_version = 0;
1da177e4 571
c41f8cbd
SS		 572 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
573 &adapter->status);
1da177e4 574
5ffd51a5 575 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
c41f8cbd 576 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 577 break;
c41f8cbd 578 default:
5ffd51a5 579 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
c41f8cbd
SS		 580 return;
581 }
1da177e4 582
c41f8cbd
SS		 583 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
584 adapter->hardware_version = bottom->hardware_version;
585 memcpy(fc_host_serial_number(shost), bottom->serial_number,
586 min(FC_SERIAL_NUMBER_SIZE, 17));
587 EBCASC(fc_host_serial_number(shost),
588 min(FC_SERIAL_NUMBER_SIZE, 17));
589 }
1da177e4 590
c41f8cbd
SS		 591 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
592 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 593 "The FCP adapter only supports newer "
594 "control block versions\n");
5ffd51a5 595 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
c41f8cbd
SS		 596 return;
597 }
598 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
599 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 600 "The FCP adapter only supports older "
601 "control block versions\n");
5ffd51a5 602 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
c41f8cbd
SS		 603 }
604}
1da177e4 605
c41f8cbd
SS		 606static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
607{
608 struct zfcp_adapter *adapter = req->adapter;
609 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
610 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 611
c41f8cbd
SS		 612 if (req->data)
613 memcpy(req->data, bottom, sizeof(*bottom));
9eb69aff 614
0282985d 615 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
c41f8cbd 616 fc_host_permanent_port_name(shost) = bottom->wwpn;
0282985d
CS		 617 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
618 } else
c41f8cbd
SS		 619 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
620 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
621 fc_host_supported_speeds(shost) = bottom->supported_speed;
622}
1da177e4 623
c41f8cbd
SS		 624static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
625{
c41f8cbd
SS		 626 struct fsf_qtcb *qtcb = req->qtcb;
627
628 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
629 return;
630
631 switch (qtcb->header.fsf_status) {
632 case FSF_GOOD:
633 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 634 break;
635 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
636 zfcp_fsf_exchange_port_evaluate(req);
5ffd51a5 637 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
c41f8cbd 638 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 639 break;
1da177e4 640 }
c41f8cbd 641}
d26ab06e 642
564e1c86 643static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
c41f8cbd 644{
564e1c86 645 struct zfcp_qdio_queue *req_q = &qdio->req_q;
c41f8cbd 646
564e1c86 647 spin_lock_bh(&qdio->req_q_lock);
7001f0c4
MP		 648 if (atomic_read(&req_q->count))
649 return 1;
564e1c86 650 spin_unlock_bh(&qdio->req_q_lock);
7001f0c4
MP		 651 return 0;
652}
653
564e1c86 654static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
7001f0c4 655{
564e1c86 656 struct zfcp_adapter *adapter = qdio->adapter;
7001f0c4 657 long ret;
dedbc2b3 658
564e1c86
SS		 659 spin_unlock_bh(&qdio->req_q_lock);
660 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
661 zfcp_fsf_sbal_check(qdio), 5 * HZ);
c41f8cbd
SS		 662 if (ret > 0)
663 return 0;
cbf1ed02 664 if (!ret) {
564e1c86 665 atomic_inc(&qdio->req_q_full);
cbf1ed02
CS		 666 /* assume hanging outbound queue, try queue recovery */
667 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
668 }
7001f0c4 669
564e1c86 670 spin_lock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 671 return -EIO;
672}
673
a4623c46 674static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
c41f8cbd
SS		 675{
676 struct zfcp_fsf_req *req;
a4623c46
SS		 677
678 if (likely(pool))
679 req = mempool_alloc(pool, GFP_ATOMIC);
680 else
681 req = kmalloc(sizeof(*req), GFP_ATOMIC);
682
683 if (unlikely(!req))
c41f8cbd 684 return NULL;
a4623c46 685
c41f8cbd 686 memset(req, 0, sizeof(*req));
88f2a977 687 req->pool = pool;
c41f8cbd
SS		 688 return req;
689}
690
a4623c46 691static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
c41f8cbd 692{
a4623c46 693 struct fsf_qtcb *qtcb;
c41f8cbd
SS		 694
695 if (likely(pool))
696 qtcb = mempool_alloc(pool, GFP_ATOMIC);
697 else
a4623c46
SS		 698 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
699
c41f8cbd
SS		 700 if (unlikely(!qtcb))
701 return NULL;
702
703 memset(qtcb, 0, sizeof(*qtcb));
a4623c46 704 return qtcb;
c41f8cbd
SS		 705}
706
564e1c86 707static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
09a46c6e 708 u32 fsf_cmd, mempool_t *pool)
1da177e4 709{
44cc76f2 710 struct qdio_buffer_element *sbale;
564e1c86
SS		 711 struct zfcp_qdio_queue *req_q = &qdio->req_q;
712 struct zfcp_adapter *adapter = qdio->adapter;
a4623c46 713 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
1da177e4 714
c41f8cbd 715 if (unlikely(!req))
1e9b1643 716 return ERR_PTR(-ENOMEM);
1da177e4 717
c41f8cbd
SS		 718 if (adapter->req_no == 0)
719 adapter->req_no++;
1da177e4 720
c41f8cbd
SS		 721 INIT_LIST_HEAD(&req->list);
722 init_timer(&req->timer);
058b8647 723 init_completion(&req->completion);
1da177e4 724
c41f8cbd
SS		 725 req->adapter = adapter;
726 req->fsf_command = fsf_cmd;
52bfb558 727 req->req_id = adapter->req_no;
42428f74
SS		 728 req->queue_req.sbal_number = 1;
729 req->queue_req.sbal_first = req_q->first;
730 req->queue_req.sbal_last = req_q->first;
731 req->queue_req.sbale_curr = 1;
c41f8cbd 732
564e1c86 733 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 734 sbale[0].addr = (void *) req->req_id;
735 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
736
a4623c46
SS		 737 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
738 if (likely(pool))
739 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
740 else
741 req->qtcb = zfcp_qtcb_alloc(NULL);
742
743 if (unlikely(!req->qtcb)) {
744 zfcp_fsf_req_free(req);
745 return ERR_PTR(-ENOMEM);
746 }
747
564e1c86 748 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
c41f8cbd
SS		 749 req->qtcb->prefix.req_id = req->req_id;
750 req->qtcb->prefix.ulp_info = 26;
751 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
752 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
753 req->qtcb->header.req_handle = req->req_id;
754 req->qtcb->header.fsf_command = req->fsf_command;
755 req->seq_no = adapter->fsf_req_seq_no;
756 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
757 sbale[1].addr = (void *) req->qtcb;
758 sbale[1].length = sizeof(struct fsf_qtcb);
759 }
760
761 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
762 zfcp_fsf_req_free(req);
763 return ERR_PTR(-EIO);
764 }
951f746f 765
c41f8cbd 766 return req;
1da177e4
LT		 767}
768
c41f8cbd
SS		 769static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
770{
771 struct zfcp_adapter *adapter = req->adapter;
564e1c86 772 struct zfcp_qdio *qdio = adapter->qdio;
135ea137
MP		 773 unsigned long flags;
774 int idx;
775 int with_qtcb = (req->qtcb != NULL);
c41f8cbd
SS		 776
777 /* put allocated FSF request into hash table */
45316a86 778 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 779 idx = zfcp_reqlist_hash(req->req_id);
780 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 781 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 782
564e1c86 783 req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
c41f8cbd 784 req->issued = get_clock();
564e1c86 785 if (zfcp_qdio_send(qdio, &req->queue_req)) {
c41f8cbd 786 del_timer(&req->timer);
3765138a
CS		 787 spin_lock_irqsave(&adapter->req_list_lock, flags);
788 /* lookup request again, list might have changed */
789 if (zfcp_reqlist_find_safe(adapter, req))
790 zfcp_reqlist_remove(adapter, req);
791 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
5ffd51a5 792 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
c41f8cbd
SS		 793 return -EIO;
794 }
795
796 /* Don't increase for unsolicited status */
135ea137 797 if (with_qtcb)
c41f8cbd 798 adapter->fsf_req_seq_no++;
52bfb558 799 adapter->req_no++;
c41f8cbd
SS		 800
801 return 0;
802}
803
804/**
805 * zfcp_fsf_status_read - send status read request
806 * @adapter: pointer to struct zfcp_adapter
807 * @req_flags: request flags
808 * Returns: 0 on success, ERROR otherwise
1da177e4 809 */
564e1c86 810int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
1da177e4 811{
564e1c86 812 struct zfcp_adapter *adapter = qdio->adapter;
c41f8cbd
SS		 813 struct zfcp_fsf_req *req;
814 struct fsf_status_read_buffer *sr_buf;
44cc76f2 815 struct qdio_buffer_element *sbale;
c41f8cbd 816 int retval = -EIO;
1da177e4 817
564e1c86
SS		 818 spin_lock_bh(&qdio->req_q_lock);
819 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 820 goto out;
821
564e1c86 822 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
a4623c46 823 adapter->pool.status_read_req);
025270f0 824 if (IS_ERR(req)) {
c41f8cbd
SS		 825 retval = PTR_ERR(req);
826 goto out;
1da177e4
LT		 827 }
828
564e1c86 829 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 830 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
42428f74 831 req->queue_req.sbale_curr = 2;
c41f8cbd 832
a4623c46 833 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
c41f8cbd
SS		 834 if (!sr_buf) {
835 retval = -ENOMEM;
836 goto failed_buf;
837 }
838 memset(sr_buf, 0, sizeof(*sr_buf));
839 req->data = sr_buf;
564e1c86 840 sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
c41f8cbd
SS		 841 sbale->addr = (void *) sr_buf;
842 sbale->length = sizeof(*sr_buf);
059c97d0 843
c41f8cbd
SS		 844 retval = zfcp_fsf_req_send(req);
845 if (retval)
846 goto failed_req_send;
1da177e4 847
c41f8cbd
SS		 848 goto out;
849
850failed_req_send:
a4623c46 851 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd
SS		 852failed_buf:
853 zfcp_fsf_req_free(req);
5771710b 854 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
c41f8cbd 855out:
564e1c86 856 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 857 return retval;
858}
859
860static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
861{
862 struct zfcp_unit *unit = req->data;
863 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
864
865 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
866 return;
867
868 switch (req->qtcb->header.fsf_status) {
1da177e4 869 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 870 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5
SS		 871 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
872 "fsafch1", req);
c41f8cbd 873 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 874 }
875 break;
1da177e4 876 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd 877 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5 878 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
c41f8cbd 879 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 880 }
881 break;
1da177e4 882 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 883 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 884 break;
1da177e4 885 case FSF_PORT_BOXED:
5ffd51a5 886 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
c41f8cbd
SS		 887 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
888 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 889 break;
1da177e4 890 case FSF_LUN_BOXED:
5ffd51a5 891 zfcp_erp_unit_boxed(unit, "fsafch4", req);
c41f8cbd
SS		 892 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
893 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 894 break;
1da177e4 895 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 896 switch (fsq->word[0]) {
1da177e4 897 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 898 zfcp_fc_test_link(unit->port);
dceab655 899 /* fall through */
1da177e4 900 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 902 break;
1da177e4
LT		 903 }
904 break;
1da177e4 905 case FSF_GOOD:
c41f8cbd 906 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 907 break;
1da177e4 908 }
1da177e4
LT		 909}
910
911/**
c41f8cbd
SS		 912 * zfcp_fsf_abort_fcp_command - abort running SCSI command
913 * @old_req_id: unsigned long
c41f8cbd 914 * @unit: pointer to struct zfcp_unit
c41f8cbd 915 * Returns: pointer to struct zfcp_fsf_req
1da177e4 916 */
1da177e4 917
c41f8cbd 918struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
63caf367 919 struct zfcp_unit *unit)
1da177e4 920{
44cc76f2 921 struct qdio_buffer_element *sbale;
c41f8cbd 922 struct zfcp_fsf_req *req = NULL;
564e1c86 923 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
8a36e453 924
564e1c86
SS		 925 spin_lock_bh(&qdio->req_q_lock);
926 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 927 goto out;
564e1c86
SS		 928 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
929 qdio->adapter->pool.scsi_abort);
633528c3
SS		 930 if (IS_ERR(req)) {
931 req = NULL;
c41f8cbd 932 goto out;
633528c3 933 }
2abbe866 934
c41f8cbd
SS		 935 if (unlikely(!(atomic_read(&unit->status) &
936 ZFCP_STATUS_COMMON_UNBLOCKED)))
937 goto out_error_free;
1da177e4 938
564e1c86 939 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 940 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
941 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 942
c41f8cbd
SS		 943 req->data = unit;
944 req->handler = zfcp_fsf_abort_fcp_command_handler;
945 req->qtcb->header.lun_handle = unit->handle;
946 req->qtcb->header.port_handle = unit->port->handle;
947 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
948
949 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
950 if (!zfcp_fsf_req_send(req))
951 goto out;
952
953out_error_free:
954 zfcp_fsf_req_free(req);
955 req = NULL;
956out:
564e1c86 957 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 958 return req;
1da177e4
LT		 959}
960
c41f8cbd 961static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 962{
c41f8cbd
SS		 963 struct zfcp_adapter *adapter = req->adapter;
964 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 965 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 966
c41f8cbd 967 send_ct->status = -EINVAL;
1da177e4 968
c41f8cbd 969 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 970 goto skip_fsfstatus;
971
1da177e4 972 switch (header->fsf_status) {
1da177e4 973 case FSF_GOOD:
5771710b 974 zfcp_dbf_san_ct_response(req);
c41f8cbd 975 send_ct->status = 0;
1da177e4 976 break;
1da177e4 977 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 978 zfcp_fsf_class_not_supp(req);
1da177e4 979 break;
1da177e4 980 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 981 switch (header->fsf_status_qual.word[0]){
982 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 983 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 984 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 985 break;
1da177e4
LT		 986 }
987 break;
1da177e4 988 case FSF_ACCESS_DENIED:
1da177e4 989 break;
1da177e4 990 case FSF_PORT_BOXED:
c41f8cbd
SS		 991 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
992 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 993 break;
c41f8cbd 994 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 995 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
dceab655 996 /* fall through */
c41f8cbd 997 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 998 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 999 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1000 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1001 case FSF_SBAL_MISMATCH:
c41f8cbd 1002 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1003 break;
1004 }
1005
1006skip_fsfstatus:
c41f8cbd 1007 if (send_ct->handler)
1da177e4 1008 send_ct->handler(send_ct->handler_data);
c41f8cbd 1009}
1da177e4 1010
426f6059
CS		 1011static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1012 struct scatterlist *sg_req,
1013 struct scatterlist *sg_resp)
1014{
1015 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1016 sbale[2].addr = sg_virt(sg_req);
1017 sbale[2].length = sg_req->length;
1018 sbale[3].addr = sg_virt(sg_resp);
1019 sbale[3].length = sg_resp->length;
1020 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1021}
1022
1023static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1024{
1025 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1026}
1027
39eb7e9a
CS		 1028static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1029 struct scatterlist *sg_req,
1030 struct scatterlist *sg_resp,
1031 int max_sbals)
c41f8cbd 1032{
42428f74 1033 struct zfcp_adapter *adapter = req->adapter;
564e1c86 1034 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
42428f74
SS		 1035 &req->queue_req);
1036 u32 feat = adapter->adapter_features;
c41f8cbd
SS		 1037 int bytes;
1038
39eb7e9a 1039 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
426f6059 1040 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
39eb7e9a
CS		 1041 return -EOPNOTSUPP;
1042
426f6059
CS		 1043 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1044 return 0;
1045 }
1046
1047 /* use single, unchained SBAL if it can hold the request */
1048 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1049 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
39eb7e9a
CS		 1050 return 0;
1051 }
1052
564e1c86 1053 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
42428f74 1054 SBAL_FLAGS0_TYPE_WRITE_READ,
c41f8cbd
SS		 1055 sg_req, max_sbals);
1056 if (bytes <= 0)
9072df4d 1057 return -EIO;
c41f8cbd 1058 req->qtcb->bottom.support.req_buf_length = bytes;
42428f74 1059 req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
c41f8cbd 1060
564e1c86 1061 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
42428f74 1062 SBAL_FLAGS0_TYPE_WRITE_READ,
c41f8cbd 1063 sg_resp, max_sbals);
b1a58985 1064 req->qtcb->bottom.support.resp_buf_length = bytes;
c41f8cbd 1065 if (bytes <= 0)
9072df4d 1066 return -EIO;
98fc4d5c 1067
b1a58985
CS		 1068 return 0;
1069}
1070
1071static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1072 struct scatterlist *sg_req,
1073 struct scatterlist *sg_resp,
1074 int max_sbals)
1075{
1076 int ret;
9d05ce2c 1077 unsigned int fcp_chan_timeout;
b1a58985
CS		 1078
1079 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1080 if (ret)
1081 return ret;
1082
98fc4d5c 1083 /* common settings for ct/gs and els requests */
9d05ce2c 1084 fcp_chan_timeout = 2 * FC_DEF_R_A_TOV / 1000;
98fc4d5c 1085 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
9d05ce2c
CS		 1086 req->qtcb->bottom.support.timeout = fcp_chan_timeout;
1087 zfcp_fsf_start_timer(req, (fcp_chan_timeout + 10) * HZ);
c41f8cbd
SS		 1088
1089 return 0;
1da177e4
LT		 1090}
1091
1092/**
c41f8cbd
SS		 1093 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1094 * @ct: pointer to struct zfcp_send_ct with data for request
1095 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1da177e4 1096 */
799b76d0 1097int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1da177e4 1098{
bd0072ec 1099 struct zfcp_fc_wka_port *wka_port = ct->wka_port;
564e1c86 1100 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
c41f8cbd
SS		 1101 struct zfcp_fsf_req *req;
1102 int ret = -EIO;
1da177e4 1103
564e1c86
SS		 1104 spin_lock_bh(&qdio->req_q_lock);
1105 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1106 goto out;
1da177e4 1107
564e1c86 1108 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
09a46c6e 1109
025270f0 1110 if (IS_ERR(req)) {
c41f8cbd
SS		 1111 ret = PTR_ERR(req);
1112 goto out;
3f0ca62a
CS		 1113 }
1114
09a46c6e 1115 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985
CS		 1116 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1117 FSF_MAX_SBALS_PER_REQ);
553448f6 1118 if (ret)
1da177e4 1119 goto failed_send;
1da177e4 1120
c41f8cbd 1121 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1122 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1123 req->data = ct;
1124
5771710b 1125 zfcp_dbf_san_ct_request(req);
1da177e4 1126
c41f8cbd
SS		 1127 ret = zfcp_fsf_req_send(req);
1128 if (ret)
1129 goto failed_send;
1da177e4 1130
c41f8cbd 1131 goto out;
1da177e4 1132
c41f8cbd
SS		 1133failed_send:
1134 zfcp_fsf_req_free(req);
c41f8cbd 1135out:
564e1c86 1136 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1137 return ret;
1da177e4
LT		 1138}
1139
c41f8cbd 1140static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1141{
c41f8cbd
SS		 1142 struct zfcp_send_els *send_els = req->data;
1143 struct zfcp_port *port = send_els->port;
1144 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1145
c41f8cbd 1146 send_els->status = -EINVAL;
1da177e4 1147
c41f8cbd 1148 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1149 goto skip_fsfstatus;
1150
1151 switch (header->fsf_status) {
1da177e4 1152 case FSF_GOOD:
5771710b 1153 zfcp_dbf_san_els_response(req);
c41f8cbd 1154 send_els->status = 0;
1da177e4 1155 break;
1da177e4 1156 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1157 zfcp_fsf_class_not_supp(req);
1da177e4 1158 break;
1da177e4 1159 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1160 switch (header->fsf_status_qual.word[0]){
1161 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
9d05ce2c 1162 if (port && (send_els->ls_code != ELS_ADISC))
6f53a2d2 1163 zfcp_fc_test_link(port);
c41f8cbd 1164 /*fall through */
1da177e4 1165 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1166 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1167 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1168 break;
1da177e4
LT		 1169 }
1170 break;
1da177e4 1171 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1172 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1173 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1174 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1175 break;
1da177e4 1176 case FSF_ACCESS_DENIED:
dc577d55
CS		 1177 if (port)
1178 zfcp_fsf_access_denied_port(req, port);
1da177e4 1179 break;
c41f8cbd
SS		 1180 case FSF_SBAL_MISMATCH:
1181 /* should never occure, avoided in zfcp_fsf_send_els */
1182 /* fall through */
1da177e4 1183 default:
c41f8cbd 1184 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1185 break;
1186 }
1da177e4 1187skip_fsfstatus:
aa551daf 1188 if (send_els->handler)
1da177e4 1189 send_els->handler(send_els->handler_data);
c41f8cbd 1190}
1da177e4 1191
c41f8cbd
SS		 1192/**
1193 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1194 * @els: pointer to struct zfcp_send_els with data for the command
1195 */
1196int zfcp_fsf_send_els(struct zfcp_send_els *els)
1197{
1198 struct zfcp_fsf_req *req;
564e1c86 1199 struct zfcp_qdio *qdio = els->adapter->qdio;
c41f8cbd
SS		 1200 int ret = -EIO;
1201
564e1c86
SS		 1202 spin_lock_bh(&qdio->req_q_lock);
1203 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1204 goto out;
09a46c6e 1205
564e1c86 1206 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
09a46c6e 1207
025270f0 1208 if (IS_ERR(req)) {
c41f8cbd
SS		 1209 ret = PTR_ERR(req);
1210 goto out;
1211 }
1212
09a46c6e 1213 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985 1214 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
44cc76f2 1215
c41f8cbd
SS		 1216 if (ret)
1217 goto failed_send;
1218
98fc4d5c 1219 req->qtcb->bottom.support.d_id = els->d_id;
c41f8cbd 1220 req->handler = zfcp_fsf_send_els_handler;
c41f8cbd
SS		 1221 req->data = els;
1222
5771710b 1223 zfcp_dbf_san_els_request(req);
c41f8cbd 1224
c41f8cbd
SS		 1225 ret = zfcp_fsf_req_send(req);
1226 if (ret)
1227 goto failed_send;
1228
1229 goto out;
1230
1231failed_send:
1232 zfcp_fsf_req_free(req);
1233out:
564e1c86 1234 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1235 return ret;
1da177e4
LT		 1236}
1237
c41f8cbd 1238int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1239{
44cc76f2 1240 struct qdio_buffer_element *sbale;
c41f8cbd 1241 struct zfcp_fsf_req *req;
564e1c86 1242 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1243 int retval = -EIO;
1244
564e1c86
SS		 1245 spin_lock_bh(&qdio->req_q_lock);
1246 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1247 goto out;
09a46c6e 1248
564e1c86
SS		 1249 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1250 qdio->adapter->pool.erp_req);
09a46c6e 1251
025270f0 1252 if (IS_ERR(req)) {
c41f8cbd
SS		 1253 retval = PTR_ERR(req);
1254 goto out;
1da177e4
LT		 1255 }
1256
09a46c6e 1257 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1258 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1259 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1260 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1261
c41f8cbd 1262 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1263 FSF_FEATURE_CFDC |
1264 FSF_FEATURE_LUN_SHARING |
9eb69aff 1265 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1266 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1267 req->erp_action = erp_action;
1268 req->handler = zfcp_fsf_exchange_config_data_handler;
1269 erp_action->fsf_req = req;
1da177e4 1270
287ac01a 1271 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1272 retval = zfcp_fsf_req_send(req);
1da177e4 1273 if (retval) {
c41f8cbd 1274 zfcp_fsf_req_free(req);
1da177e4 1275 erp_action->fsf_req = NULL;
1da177e4 1276 }
c41f8cbd 1277out:
564e1c86 1278 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1279 return retval;
1280}
1da177e4 1281
564e1c86 1282int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1283 struct fsf_qtcb_bottom_config *data)
52ef11a7 1284{
44cc76f2 1285 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1286 struct zfcp_fsf_req *req = NULL;
1287 int retval = -EIO;
1288
564e1c86
SS		 1289 spin_lock_bh(&qdio->req_q_lock);
1290 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1291 goto out_unlock;
c41f8cbd 1292
564e1c86 1293 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
09a46c6e 1294
025270f0 1295 if (IS_ERR(req)) {
c41f8cbd 1296 retval = PTR_ERR(req);
ada81b74 1297 goto out_unlock;
52ef11a7
SS		 1298 }
1299
564e1c86 1300 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1301 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1302 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1303 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1304
c41f8cbd 1305 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1306 FSF_FEATURE_CFDC |
1307 FSF_FEATURE_LUN_SHARING |
1308 FSF_FEATURE_NOTIFICATION_LOST |
1309 FSF_FEATURE_UPDATE_ALERT;
1310
1311 if (data)
c41f8cbd 1312 req->data = data;
52ef11a7 1313
c41f8cbd
SS		 1314 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1315 retval = zfcp_fsf_req_send(req);
564e1c86 1316 spin_unlock_bh(&qdio->req_q_lock);
553448f6 1317 if (!retval)
058b8647 1318 wait_for_completion(&req->completion);
52ef11a7 1319
c41f8cbd 1320 zfcp_fsf_req_free(req);
ada81b74 1321 return retval;
52ef11a7 1322
ada81b74 1323out_unlock:
564e1c86 1324 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1325 return retval;
1326}
1327
1da177e4
LT		 1328/**
1329 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1330 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1331 * Returns: 0 on success, error otherwise
1da177e4 1332 */
c41f8cbd 1333int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1334{
564e1c86 1335 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
44cc76f2 1336 struct qdio_buffer_element *sbale;
c41f8cbd 1337 struct zfcp_fsf_req *req;
c41f8cbd 1338 int retval = -EIO;
1da177e4 1339
564e1c86 1340 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1341 return -EOPNOTSUPP;
1da177e4 1342
564e1c86
SS		 1343 spin_lock_bh(&qdio->req_q_lock);
1344 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1345 goto out;
09a46c6e 1346
564e1c86
SS		 1347 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1348 qdio->adapter->pool.erp_req);
09a46c6e 1349
025270f0 1350 if (IS_ERR(req)) {
c41f8cbd
SS		 1351 retval = PTR_ERR(req);
1352 goto out;
aef4a983
MS		 1353 }
1354
09a46c6e 1355 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1356 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1357 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1358 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1359
c41f8cbd
SS		 1360 req->handler = zfcp_fsf_exchange_port_data_handler;
1361 req->erp_action = erp_action;
1362 erp_action->fsf_req = req;
52ef11a7 1363
287ac01a 1364 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1365 retval = zfcp_fsf_req_send(req);
1da177e4 1366 if (retval) {
c41f8cbd 1367 zfcp_fsf_req_free(req);
52ef11a7
SS		 1368 erp_action->fsf_req = NULL;
1369 }
c41f8cbd 1370out:
564e1c86 1371 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1372 return retval;
1373}
1374
52ef11a7
SS		 1375/**
1376 * zfcp_fsf_exchange_port_data_sync - request information about local port
564e1c86 1377 * @qdio: pointer to struct zfcp_qdio
c41f8cbd
SS		 1378 * @data: pointer to struct fsf_qtcb_bottom_port
1379 * Returns: 0 on success, error otherwise
52ef11a7 1380 */
564e1c86 1381int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1382 struct fsf_qtcb_bottom_port *data)
52ef11a7 1383{
44cc76f2 1384 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1385 struct zfcp_fsf_req *req = NULL;
1386 int retval = -EIO;
52ef11a7 1387
564e1c86 1388 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1389 return -EOPNOTSUPP;
52ef11a7 1390
564e1c86
SS		 1391 spin_lock_bh(&qdio->req_q_lock);
1392 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1393 goto out_unlock;
c41f8cbd 1394
564e1c86 1395 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
09a46c6e 1396
025270f0 1397 if (IS_ERR(req)) {
c41f8cbd 1398 retval = PTR_ERR(req);
ada81b74 1399 goto out_unlock;
1da177e4
LT		 1400 }
1401
52ef11a7 1402 if (data)
c41f8cbd 1403 req->data = data;
52ef11a7 1404
564e1c86 1405 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1406 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1407 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1408
c41f8cbd
SS		 1409 req->handler = zfcp_fsf_exchange_port_data_handler;
1410 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1411 retval = zfcp_fsf_req_send(req);
564e1c86 1412 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1413
553448f6 1414 if (!retval)
058b8647
SS		 1415 wait_for_completion(&req->completion);
1416
c41f8cbd 1417 zfcp_fsf_req_free(req);
1da177e4 1418
1da177e4 1419 return retval;
ada81b74
CS		 1420
1421out_unlock:
564e1c86 1422 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1423 return retval;
1da177e4
LT		 1424}
1425
c41f8cbd 1426static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1427{
c41f8cbd
SS		 1428 struct zfcp_port *port = req->data;
1429 struct fsf_qtcb_header *header = &req->qtcb->header;
9d05ce2c 1430 struct fc_els_flogi *plogi;
1da177e4 1431
c41f8cbd 1432 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a17c5855 1433 goto out;
1da177e4 1434
1da177e4 1435 switch (header->fsf_status) {
1da177e4 1436 case FSF_PORT_ALREADY_OPEN:
1da177e4 1437 break;
1da177e4 1438 case FSF_ACCESS_DENIED:
c41f8cbd 1439 zfcp_fsf_access_denied_port(req, port);
1da177e4 1440 break;
1da177e4 1441 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1442 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1443 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1444 "remote port 0x%016Lx\n",
1445 (unsigned long long)port->wwpn);
5ffd51a5 1446 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1447 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1448 break;
1da177e4 1449 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1450 switch (header->fsf_status_qual.word[0]) {
1451 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1452 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1453 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1454 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1455 break;
1456 }
1457 break;
1da177e4 1458 case FSF_GOOD:
1da177e4 1459 port->handle = header->port_handle;
1da177e4
LT		 1460 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1461 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1462 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1463 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1464 &port->status);
1da177e4
LT		 1465 /* check whether D_ID has changed during open */
1466 /*
1467 * FIXME: This check is not airtight, as the FCP channel does
1468 * not monitor closures of target port connections caused on
1469 * the remote side. Thus, they might miss out on invalidating
1470 * locally cached WWPNs (and other N_Port parameters) of gone
1471 * target ports. So, our heroic attempt to make things safe
1472 * could be undermined by 'open port' response data tagged with
1473 * obsolete WWPNs. Another reason to monitor potential
1474 * connection closures ourself at least (by interpreting
1475 * incoming ELS' and unsolicited status). It just crosses my
1476 * mind that one should be able to cross-check by means of
1477 * another GID_PN straight after a port has been opened.
1478 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1479 */
9d05ce2c 1480 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
39eb7e9a 1481 if (req->qtcb->bottom.support.els1_length >=
9d05ce2c 1482 FSF_PLOGI_MIN_LEN)
c41f8cbd 1483 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4 1484 break;
1da177e4 1485 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1486 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1487 break;
1488 }
a17c5855
MP		 1489
1490out:
f3450c7b 1491 put_device(&port->sysfs_device);
1da177e4
LT		 1492}
1493
c41f8cbd
SS		 1494/**
1495 * zfcp_fsf_open_port - create and send open port request
1496 * @erp_action: pointer to struct zfcp_erp_action
1497 * Returns: 0 on success, error otherwise
1da177e4 1498 */
c41f8cbd 1499int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1500{
44cc76f2 1501 struct qdio_buffer_element *sbale;
564e1c86 1502 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
a17c5855 1503 struct zfcp_port *port = erp_action->port;
564e1c86 1504 struct zfcp_fsf_req *req;
c41f8cbd
SS		 1505 int retval = -EIO;
1506
564e1c86
SS		 1507 spin_lock_bh(&qdio->req_q_lock);
1508 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1509 goto out;
1510
564e1c86
SS		 1511 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1512 qdio->adapter->pool.erp_req);
09a46c6e 1513
025270f0 1514 if (IS_ERR(req)) {
c41f8cbd 1515 retval = PTR_ERR(req);
1da177e4 1516 goto out;
c41f8cbd 1517 }
1da177e4 1518
09a46c6e 1519 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1520 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1521 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1522 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1523
c41f8cbd 1524 req->handler = zfcp_fsf_open_port_handler;
a17c5855
MP		 1525 req->qtcb->bottom.support.d_id = port->d_id;
1526 req->data = port;
c41f8cbd
SS		 1527 req->erp_action = erp_action;
1528 erp_action->fsf_req = req;
f3450c7b 1529 get_device(&port->sysfs_device);
c41f8cbd 1530
287ac01a 1531 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1532 retval = zfcp_fsf_req_send(req);
1da177e4 1533 if (retval) {
c41f8cbd 1534 zfcp_fsf_req_free(req);
1da177e4 1535 erp_action->fsf_req = NULL;
f3450c7b 1536 put_device(&port->sysfs_device);
1da177e4 1537 }
c41f8cbd 1538out:
564e1c86 1539 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1540 return retval;
1541}
1542
c41f8cbd 1543static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1544{
c41f8cbd 1545 struct zfcp_port *port = req->data;
1da177e4 1546
c41f8cbd 1547 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1548 return;
1da177e4 1549
c41f8cbd 1550 switch (req->qtcb->header.fsf_status) {
1da177e4 1551 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1552 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1553 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1554 break;
1da177e4 1555 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1556 break;
1da177e4 1557 case FSF_GOOD:
5ffd51a5 1558 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1559 ZFCP_STATUS_COMMON_OPEN,
1560 ZFCP_CLEAR);
1da177e4 1561 break;
1da177e4 1562 }
1da177e4
LT		 1563}
1564
c41f8cbd
SS		 1565/**
1566 * zfcp_fsf_close_port - create and send close port request
1567 * @erp_action: pointer to struct zfcp_erp_action
1568 * Returns: 0 on success, error otherwise
1da177e4 1569 */
c41f8cbd 1570int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1571{
44cc76f2 1572 struct qdio_buffer_element *sbale;
564e1c86 1573 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1574 struct zfcp_fsf_req *req;
1575 int retval = -EIO;
1576
564e1c86
SS		 1577 spin_lock_bh(&qdio->req_q_lock);
1578 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1579 goto out;
1580
564e1c86
SS		 1581 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1582 qdio->adapter->pool.erp_req);
09a46c6e 1583
025270f0 1584 if (IS_ERR(req)) {
c41f8cbd 1585 retval = PTR_ERR(req);
1da177e4 1586 goto out;
c41f8cbd 1587 }
1da177e4 1588
09a46c6e 1589 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1590 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1591 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1592 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1593
c41f8cbd
SS		 1594 req->handler = zfcp_fsf_close_port_handler;
1595 req->data = erp_action->port;
1596 req->erp_action = erp_action;
1597 req->qtcb->header.port_handle = erp_action->port->handle;
1598 erp_action->fsf_req = req;
c41f8cbd 1599
287ac01a 1600 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1601 retval = zfcp_fsf_req_send(req);
1da177e4 1602 if (retval) {
c41f8cbd 1603 zfcp_fsf_req_free(req);
1da177e4 1604 erp_action->fsf_req = NULL;
1da177e4 1605 }
c41f8cbd 1606out:
564e1c86 1607 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1608 return retval;
1609}
1610
5ab944f9
SS		 1611static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1612{
bd0072ec 1613 struct zfcp_fc_wka_port *wka_port = req->data;
5ab944f9
SS		 1614 struct fsf_qtcb_header *header = &req->qtcb->header;
1615
1616 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
bd0072ec 1617 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
5ab944f9
SS		 1618 goto out;
1619 }
1620
1621 switch (header->fsf_status) {
1622 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1623 dev_warn(&req->adapter->ccw_device->dev,
1624 "Opening WKA port 0x%x failed\n", wka_port->d_id);
dceab655 1625 /* fall through */
5ab944f9
SS		 1626 case FSF_ADAPTER_STATUS_AVAILABLE:
1627 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
dceab655 1628 /* fall through */
5ab944f9 1629 case FSF_ACCESS_DENIED:
bd0072ec 1630 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
5ab944f9 1631 break;
5ab944f9
SS		 1632 case FSF_GOOD:
1633 wka_port->handle = header->port_handle;
27f492cc
SS		 1634 /* fall through */
1635 case FSF_PORT_ALREADY_OPEN:
bd0072ec 1636 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
5ab944f9
SS		 1637 }
1638out:
1639 wake_up(&wka_port->completion_wq);
1640}
1641
1642/**
1643 * zfcp_fsf_open_wka_port - create and send open wka-port request
bd0072ec 1644 * @wka_port: pointer to struct zfcp_fc_wka_port
5ab944f9
SS		 1645 * Returns: 0 on success, error otherwise
1646 */
bd0072ec 1647int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
5ab944f9
SS		 1648{
1649 struct qdio_buffer_element *sbale;
564e1c86 1650 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1651 struct zfcp_fsf_req *req;
1652 int retval = -EIO;
1653
564e1c86
SS		 1654 spin_lock_bh(&qdio->req_q_lock);
1655 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1656 goto out;
1657
564e1c86
SS		 1658 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1659 qdio->adapter->pool.erp_req);
09a46c6e 1660
5ab944f9
SS		 1661 if (unlikely(IS_ERR(req))) {
1662 retval = PTR_ERR(req);
1663 goto out;
1664 }
1665
09a46c6e 1666 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1667 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1668 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1669 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1670
1671 req->handler = zfcp_fsf_open_wka_port_handler;
1672 req->qtcb->bottom.support.d_id = wka_port->d_id;
1673 req->data = wka_port;
1674
1675 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1676 retval = zfcp_fsf_req_send(req);
1677 if (retval)
1678 zfcp_fsf_req_free(req);
1679out:
564e1c86 1680 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1681 return retval;
1682}
1683
1684static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1685{
bd0072ec 1686 struct zfcp_fc_wka_port *wka_port = req->data;
5ab944f9
SS		 1687
1688 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1689 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1690 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1691 }
1692
bd0072ec 1693 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
5ab944f9
SS		 1694 wake_up(&wka_port->completion_wq);
1695}
1696
1697/**
1698 * zfcp_fsf_close_wka_port - create and send close wka port request
bd0072ec 1699 * @wka_port: WKA port to open
5ab944f9
SS		 1700 * Returns: 0 on success, error otherwise
1701 */
bd0072ec 1702int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
5ab944f9
SS		 1703{
1704 struct qdio_buffer_element *sbale;
564e1c86 1705 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1706 struct zfcp_fsf_req *req;
1707 int retval = -EIO;
1708
564e1c86
SS		 1709 spin_lock_bh(&qdio->req_q_lock);
1710 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1711 goto out;
1712
564e1c86
SS		 1713 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1714 qdio->adapter->pool.erp_req);
09a46c6e 1715
5ab944f9
SS		 1716 if (unlikely(IS_ERR(req))) {
1717 retval = PTR_ERR(req);
1718 goto out;
1719 }
1720
09a46c6e 1721 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1722 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1723 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1724 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1725
1726 req->handler = zfcp_fsf_close_wka_port_handler;
1727 req->data = wka_port;
1728 req->qtcb->header.port_handle = wka_port->handle;
1729
1730 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1731 retval = zfcp_fsf_req_send(req);
1732 if (retval)
1733 zfcp_fsf_req_free(req);
1734out:
564e1c86 1735 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1736 return retval;
1737}
1738
c41f8cbd 1739static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1740{
c41f8cbd
SS		 1741 struct zfcp_port *port = req->data;
1742 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1743 struct zfcp_unit *unit;
1da177e4 1744
c41f8cbd 1745 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1746 return;
1da177e4 1747
1da177e4 1748 switch (header->fsf_status) {
1da177e4 1749 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1750 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1751 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1752 break;
1da177e4 1753 case FSF_ACCESS_DENIED:
c41f8cbd 1754 zfcp_fsf_access_denied_port(req, port);
1da177e4 1755 break;
1da177e4 1756 case FSF_PORT_BOXED:
5c815d15
CS		 1757 /* can't use generic zfcp_erp_modify_port_status because
1758 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1759 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
ecf0c772
SS		 1760 read_lock(&port->unit_list_lock);
1761 list_for_each_entry(unit, &port->unit_list, list)
5c815d15
CS		 1762 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1763 &unit->status);
ecf0c772 1764 read_unlock(&port->unit_list_lock);
dfb3cf00
SS		 1765 zfcp_erp_port_boxed(port, "fscpph2", req);
1766 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1767 ZFCP_STATUS_FSFREQ_RETRY;
1768
1da177e4 1769 break;
1da177e4 1770 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1771 switch (header->fsf_status_qual.word[0]) {
1772 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1773 /* fall through */
1da177e4 1774 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1775 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1776 break;
1da177e4
LT		 1777 }
1778 break;
1da177e4 1779 case FSF_GOOD:
1da177e4
LT		 1780 /* can't use generic zfcp_erp_modify_port_status because
1781 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1782 */
1783 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
ecf0c772
SS		 1784 read_lock(&port->unit_list_lock);
1785 list_for_each_entry(unit, &port->unit_list, list)
c41f8cbd
SS		 1786 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1787 &unit->status);
ecf0c772 1788 read_unlock(&port->unit_list_lock);
1da177e4 1789 break;
1da177e4 1790 }
1da177e4
LT		 1791}
1792
c41f8cbd
SS		 1793/**
1794 * zfcp_fsf_close_physical_port - close physical port
1795 * @erp_action: pointer to struct zfcp_erp_action
1796 * Returns: 0 on success
1da177e4 1797 */
c41f8cbd 1798int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1799{
44cc76f2 1800 struct qdio_buffer_element *sbale;
564e1c86 1801 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1802 struct zfcp_fsf_req *req;
1803 int retval = -EIO;
1804
564e1c86
SS		 1805 spin_lock_bh(&qdio->req_q_lock);
1806 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1807 goto out;
1da177e4 1808
564e1c86
SS		 1809 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1810 qdio->adapter->pool.erp_req);
09a46c6e 1811
025270f0 1812 if (IS_ERR(req)) {
c41f8cbd
SS		 1813 retval = PTR_ERR(req);
1814 goto out;
1815 }
1da177e4 1816
09a46c6e 1817 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1818 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 1819 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1820 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1821
c41f8cbd
SS		 1822 req->data = erp_action->port;
1823 req->qtcb->header.port_handle = erp_action->port->handle;
1824 req->erp_action = erp_action;
1825 req->handler = zfcp_fsf_close_physical_port_handler;
1826 erp_action->fsf_req = req;
c41f8cbd 1827
287ac01a 1828 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1829 retval = zfcp_fsf_req_send(req);
1da177e4 1830 if (retval) {
c41f8cbd 1831 zfcp_fsf_req_free(req);
1da177e4 1832 erp_action->fsf_req = NULL;
1da177e4 1833 }
c41f8cbd 1834out:
564e1c86 1835 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1836 return retval;
1837}
1838
c41f8cbd 1839static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1840{
c41f8cbd
SS		 1841 struct zfcp_adapter *adapter = req->adapter;
1842 struct zfcp_unit *unit = req->data;
1843 struct fsf_qtcb_header *header = &req->qtcb->header;
1844 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1845 struct fsf_queue_designator *queue_designator =
1846 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1847 int exclusive, readwrite;
1da177e4 1848
c41f8cbd 1849 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1850 return;
1da177e4 1851
1da177e4 1852 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1853 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1854 ZFCP_STATUS_UNIT_SHARED |
1855 ZFCP_STATUS_UNIT_READONLY,
1856 &unit->status);
1857
1da177e4
LT		 1858 switch (header->fsf_status) {
1859
1860 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1861 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1862 /* fall through */
1da177e4 1863 case FSF_LUN_ALREADY_OPEN:
1da177e4 1864 break;
1da177e4 1865 case FSF_ACCESS_DENIED:
c41f8cbd 1866 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1867 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1868 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1869 break;
1da177e4 1870 case FSF_PORT_BOXED:
5ffd51a5 1871 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1872 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1873 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1874 break;
1da177e4 1875 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1876 if (header->fsf_status_qual.word[0])
553448f6 1877 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1878 "LUN 0x%Lx on port 0x%Lx is already in "
1879 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1880 (unsigned long long)unit->fcp_lun,
1881 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1882 queue_designator->cssid,
1883 queue_designator->hla);
c41f8cbd 1884 else
553448f6
CS		 1885 zfcp_act_eval_err(adapter,
1886 header->fsf_status_qual.word[2]);
5ffd51a5 1887 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1888 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1889 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1890 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1891 break;
1da177e4 1892 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1893 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1894 "No handle is available for LUN "
1895 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1896 (unsigned long long)unit->fcp_lun,
1897 (unsigned long long)unit->port->wwpn);
5ffd51a5 1898 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1899 /* fall through */
1900 case FSF_INVALID_COMMAND_OPTION:
1901 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1902 break;
1da177e4 1903 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1904 switch (header->fsf_status_qual.word[0]) {
1905 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 1906 zfcp_fc_test_link(unit->port);
c41f8cbd 1907 /* fall through */
1da177e4 1908 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1909 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1910 break;
1da177e4
LT		 1911 }
1912 break;
1913
1da177e4 1914 case FSF_GOOD:
1da177e4 1915 unit->handle = header->lun_handle;
1da177e4 1916 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1917
1918 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1919 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
6fcf41d1 1920 !zfcp_ccw_priv_sch(adapter)) {
aef4a983
MS		 1921 exclusive = (bottom->lun_access_info &
1922 FSF_UNIT_ACCESS_EXCLUSIVE);
1923 readwrite = (bottom->lun_access_info &
1924 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1925
1da177e4
LT		 1926 if (!exclusive)
1927 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1928 &unit->status);
1929
1930 if (!readwrite) {
1931 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1932 &unit->status);
c41f8cbd 1933 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1934 "SCSI device at LUN 0x%016Lx on port "
1935 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1936 (unsigned long long)unit->fcp_lun,
1937 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1938 }
1939
1940 if (exclusive && !readwrite) {
c41f8cbd 1941 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1942 "Exclusive read-only access not "
1943 "supported (unit 0x%016Lx, "
1944 "port 0x%016Lx)\n",
7ba58c9c
SS		 1945 (unsigned long long)unit->fcp_lun,
1946 (unsigned long long)unit->port->wwpn);
5ffd51a5 1947 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1948 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1949 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1950 } else if (!exclusive && readwrite) {
c41f8cbd 1951 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1952 "Shared read-write access not "
1953 "supported (unit 0x%016Lx, port "
27c3f0a6 1954 "0x%016Lx)\n",
7ba58c9c
SS		 1955 (unsigned long long)unit->fcp_lun,
1956 (unsigned long long)unit->port->wwpn);
5ffd51a5 1957 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1958 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1959 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1960 }
1961 }
1da177e4 1962 break;
1da177e4 1963 }
1da177e4
LT		 1964}
1965
c41f8cbd
SS		 1966/**
1967 * zfcp_fsf_open_unit - open unit
1968 * @erp_action: pointer to struct zfcp_erp_action
1969 * Returns: 0 on success, error otherwise
1da177e4 1970 */
c41f8cbd 1971int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1972{
44cc76f2 1973 struct qdio_buffer_element *sbale;
c41f8cbd 1974 struct zfcp_adapter *adapter = erp_action->adapter;
564e1c86 1975 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 1976 struct zfcp_fsf_req *req;
1977 int retval = -EIO;
1978
564e1c86
SS		 1979 spin_lock_bh(&qdio->req_q_lock);
1980 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1981 goto out;
1da177e4 1982
564e1c86 1983 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
a4623c46 1984 adapter->pool.erp_req);
09a46c6e 1985
025270f0 1986 if (IS_ERR(req)) {
c41f8cbd
SS		 1987 retval = PTR_ERR(req);
1988 goto out;
1989 }
1990
09a46c6e 1991 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1992 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1993 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1994 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1995
c41f8cbd
SS		 1996 req->qtcb->header.port_handle = erp_action->port->handle;
1997 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1998 req->handler = zfcp_fsf_open_unit_handler;
1999 req->data = erp_action->unit;
2000 req->erp_action = erp_action;
2001 erp_action->fsf_req = req;
2002
2003 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2004 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2005
287ac01a 2006 zfcp_fsf_start_erp_timer(req);
c41f8cbd 2007 retval = zfcp_fsf_req_send(req);
1da177e4 2008 if (retval) {
c41f8cbd 2009 zfcp_fsf_req_free(req);
1da177e4 2010 erp_action->fsf_req = NULL;
1da177e4 2011 }
c41f8cbd 2012out:
564e1c86 2013 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 2014 return retval;
2015}
2016
c41f8cbd 2017static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 2018{
c41f8cbd 2019 struct zfcp_unit *unit = req->data;
1da177e4 2020
c41f8cbd 2021 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 2022 return;
1da177e4 2023
c41f8cbd 2024 switch (req->qtcb->header.fsf_status) {
1da177e4 2025 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2026 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 2027 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2028 break;
1da177e4 2029 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2030 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 2031 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2032 break;
1da177e4 2033 case FSF_PORT_BOXED:
5ffd51a5 2034 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 2035 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2036 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 2037 break;
1da177e4 2038 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 2039 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 2040 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 2041 zfcp_fc_test_link(unit->port);
c41f8cbd 2042 /* fall through */
1da177e4 2043 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 2044 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2045 break;
2046 }
2047 break;
1da177e4 2048 case FSF_GOOD:
1da177e4 2049 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2050 break;
1da177e4 2051 }
1da177e4
LT		 2052}
2053
2054/**
c41f8cbd
SS		 2055 * zfcp_fsf_close_unit - close zfcp unit
2056 * @erp_action: pointer to struct zfcp_unit
2057 * Returns: 0 on success, error otherwise
1da177e4 2058 */
c41f8cbd 2059int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2060{
44cc76f2 2061 struct qdio_buffer_element *sbale;
564e1c86 2062 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 2063 struct zfcp_fsf_req *req;
2064 int retval = -EIO;
1da177e4 2065
564e1c86
SS		 2066 spin_lock_bh(&qdio->req_q_lock);
2067 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 2068 goto out;
09a46c6e 2069
564e1c86
SS		 2070 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2071 qdio->adapter->pool.erp_req);
09a46c6e 2072
025270f0 2073 if (IS_ERR(req)) {
c41f8cbd
SS		 2074 retval = PTR_ERR(req);
2075 goto out;
2076 }
1da177e4 2077
09a46c6e 2078 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 2079 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2080 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2081 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2082
c41f8cbd
SS		 2083 req->qtcb->header.port_handle = erp_action->port->handle;
2084 req->qtcb->header.lun_handle = erp_action->unit->handle;
2085 req->handler = zfcp_fsf_close_unit_handler;
2086 req->data = erp_action->unit;
2087 req->erp_action = erp_action;
2088 erp_action->fsf_req = req;
fdf23452 2089
287ac01a 2090 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2091 retval = zfcp_fsf_req_send(req);
2092 if (retval) {
2093 zfcp_fsf_req_free(req);
2094 erp_action->fsf_req = NULL;
2095 }
2096out:
564e1c86 2097 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 2098 return retval;
1da177e4
LT		 2099}
2100
c9615858
CS		 2101static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2102{
2103 lat_rec->sum += lat;
c41f8cbd
SS		 2104 lat_rec->min = min(lat_rec->min, lat);
2105 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2106}
2107
d9742b42 2108static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
c9615858 2109{
d9742b42
CS		 2110 struct fsf_qual_latency_info *lat_in;
2111 struct latency_cont *lat = NULL;
c41f8cbd 2112 struct zfcp_unit *unit = req->unit;
d9742b42
CS		 2113 struct zfcp_blk_drv_data blktrc;
2114 int ticks = req->adapter->timer_ticks;
c9615858 2115
d9742b42 2116 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2117
d9742b42
CS		 2118 blktrc.flags = 0;
2119 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2120 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2121 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2122 blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2123 blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2124
2125 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2126 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2127 blktrc.channel_lat = lat_in->channel_lat * ticks;
2128 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2129
2130 switch (req->qtcb->bottom.io.data_direction) {
2131 case FSF_DATADIR_READ:
2132 lat = &unit->latencies.read;
2133 break;
2134 case FSF_DATADIR_WRITE:
2135 lat = &unit->latencies.write;
2136 break;
2137 case FSF_DATADIR_CMND:
2138 lat = &unit->latencies.cmd;
2139 break;
2140 }
1da177e4 2141
d9742b42
CS		 2142 if (lat) {
2143 spin_lock(&unit->latencies.lock);
2144 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2145 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2146 lat->counter++;
2147 spin_unlock(&unit->latencies.lock);
2148 }
0997f1c5 2149 }
0997f1c5 2150
d9742b42
CS		 2151 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2152 sizeof(blktrc));
0997f1c5 2153}
0997f1c5 2154
c41f8cbd 2155static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2156{
0ac55aa9 2157 struct scsi_cmnd *scpnt;
4318e08c 2158 struct fcp_resp_with_ext *fcp_rsp;
1da177e4 2159 unsigned long flags;
1da177e4 2160
c41f8cbd
SS		 2161 read_lock_irqsave(&req->adapter->abort_lock, flags);
2162
0ac55aa9
SS		 2163 scpnt = req->data;
2164 if (unlikely(!scpnt)) {
2165 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2166 return;
2167 }
2168
c41f8cbd 2169 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2170 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2171 goto skip_fsfstatus;
2172 }
2173
c41f8cbd 2174 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2175 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2176 goto skip_fsfstatus;
2177 }
2178
4318e08c
CS		 2179 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2180 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
1da177e4 2181
d9742b42 2182 zfcp_fsf_req_trace(req, scpnt);
0997f1c5 2183
c41f8cbd 2184skip_fsfstatus:
8a36e453 2185 if (scpnt->result != 0)
5771710b 2186 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
8a36e453 2187 else if (scpnt->retries > 0)
5771710b 2188 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
8a36e453 2189 else
5771710b 2190 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
1da177e4 2191
1da177e4 2192 scpnt->host_scribble = NULL;
1da177e4 2193 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2194 /*
2195 * We must hold this lock until scsi_done has been called.
2196 * Otherwise we may call scsi_done after abort regarding this
2197 * command has completed.
2198 * Note: scsi_done must not block!
2199 */
c41f8cbd 2200 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2201}
2202
c41f8cbd 2203static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2204{
4318e08c
CS		 2205 struct fcp_resp_with_ext *fcp_rsp;
2206 struct fcp_resp_rsp_info *rsp_info;
1da177e4 2207
4318e08c
CS		 2208 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2209 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2210
2211 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
c41f8cbd
SS		 2212 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2213 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2214}
2215
2216
2217static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2218{
2219 struct zfcp_unit *unit;
2220 struct fsf_qtcb_header *header = &req->qtcb->header;
2221
2222 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2223 unit = req->data;
2224 else
2225 unit = req->unit;
2226
2227 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2228 goto skip_fsfstatus;
1da177e4 2229
c41f8cbd
SS		 2230 switch (header->fsf_status) {
2231 case FSF_HANDLE_MISMATCH:
2232 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2233 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2234 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2235 break;
2236 case FSF_FCPLUN_NOT_VALID:
2237 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2238 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2239 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2240 break;
c41f8cbd
SS		 2241 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2242 zfcp_fsf_class_not_supp(req);
1da177e4 2243 break;
c41f8cbd
SS		 2244 case FSF_ACCESS_DENIED:
2245 zfcp_fsf_access_denied_unit(req, unit);
2246 break;
2247 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2248 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2249 "Incorrect direction %d, unit 0x%016Lx on port "
2250 "0x%016Lx closed\n",
c41f8cbd 2251 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2252 (unsigned long long)unit->fcp_lun,
2253 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2254 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2255 req);
c41f8cbd
SS		 2256 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2257 break;
2258 case FSF_CMND_LENGTH_NOT_VALID:
2259 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2260 "Incorrect CDB length %d, unit 0x%016Lx on "
2261 "port 0x%016Lx closed\n",
c41f8cbd 2262 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2263 (unsigned long long)unit->fcp_lun,
2264 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2265 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2266 req);
c41f8cbd
SS		 2267 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2268 break;
2269 case FSF_PORT_BOXED:
5ffd51a5 2270 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2271 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2272 ZFCP_STATUS_FSFREQ_RETRY;
2273 break;
2274 case FSF_LUN_BOXED:
5ffd51a5 2275 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2276 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2277 ZFCP_STATUS_FSFREQ_RETRY;
2278 break;
2279 case FSF_ADAPTER_STATUS_AVAILABLE:
2280 if (header->fsf_status_qual.word[0] ==
2281 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
6f53a2d2 2282 zfcp_fc_test_link(unit->port);
c41f8cbd 2283 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2284 break;
1da177e4 2285 }
c41f8cbd
SS		 2286skip_fsfstatus:
2287 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2288 zfcp_fsf_send_fcp_ctm_handler(req);
2289 else {
2290 zfcp_fsf_send_fcp_command_task_handler(req);
2291 req->unit = NULL;
f3450c7b 2292 put_device(&unit->sysfs_device);
c41f8cbd 2293 }
1da177e4
LT		 2294}
2295
c41f8cbd
SS		 2296/**
2297 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2298 * @unit: unit where command is sent to
2299 * @scsi_cmnd: scsi command to be sent
1da177e4 2300 */
63caf367
CS		 2301int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2302 struct scsi_cmnd *scsi_cmnd)
1da177e4 2303{
c41f8cbd 2304 struct zfcp_fsf_req *req;
4318e08c 2305 struct fcp_cmnd *fcp_cmnd;
bc90c863 2306 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
c41f8cbd 2307 int real_bytes, retval = -EIO;
63caf367 2308 struct zfcp_adapter *adapter = unit->port->adapter;
564e1c86 2309 struct zfcp_qdio *qdio = adapter->qdio;
1da177e4 2310
c41f8cbd
SS		 2311 if (unlikely(!(atomic_read(&unit->status) &
2312 ZFCP_STATUS_COMMON_UNBLOCKED)))
2313 return -EBUSY;
1da177e4 2314
564e1c86
SS		 2315 spin_lock(&qdio->req_q_lock);
2316 if (atomic_read(&qdio->req_q.count) <= 0) {
2317 atomic_inc(&qdio->req_q_full);
c41f8cbd 2318 goto out;
8fdf30d5 2319 }
09a46c6e 2320
564e1c86 2321 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
a4623c46 2322 adapter->pool.scsi_req);
09a46c6e 2323
025270f0 2324 if (IS_ERR(req)) {
c41f8cbd
SS		 2325 retval = PTR_ERR(req);
2326 goto out;
2327 }
2328
09a46c6e 2329 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
f3450c7b 2330 get_device(&unit->sysfs_device);
c41f8cbd
SS		 2331 req->unit = unit;
2332 req->data = scsi_cmnd;
2333 req->handler = zfcp_fsf_send_fcp_command_handler;
2334 req->qtcb->header.lun_handle = unit->handle;
2335 req->qtcb->header.port_handle = unit->port->handle;
2336 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
4318e08c 2337 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
c41f8cbd
SS		 2338
2339 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2340
c41f8cbd
SS		 2341 /*
2342 * set depending on data direction:
2343 * data direction bits in SBALE (SB Type)
2344 * data direction bits in QTCB
c41f8cbd
SS		 2345 */
2346 switch (scsi_cmnd->sc_data_direction) {
2347 case DMA_NONE:
2348 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
1da177e4 2349 break;
c41f8cbd
SS		 2350 case DMA_FROM_DEVICE:
2351 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
c41f8cbd
SS		 2352 break;
2353 case DMA_TO_DEVICE:
2354 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2355 sbtype = SBAL_FLAGS0_TYPE_WRITE;
1da177e4 2356 break;
c41f8cbd 2357 case DMA_BIDIRECTIONAL:
c41f8cbd 2358 goto failed_scsi_cmnd;
1da177e4
LT		 2359 }
2360
4318e08c
CS		 2361 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2362 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
1da177e4 2363
564e1c86 2364 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
c41f8cbd
SS		 2365 scsi_sglist(scsi_cmnd),
2366 FSF_MAX_SBALS_PER_REQ);
2367 if (unlikely(real_bytes < 0)) {
42428f74 2368 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
c41f8cbd 2369 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2370 "Oversize data package, unit 0x%016Lx "
2371 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2372 (unsigned long long)unit->fcp_lun,
2373 (unsigned long long)unit->port->wwpn);
5ffd51a5 2374 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2375 retval = -EINVAL;
2376 }
2377 goto failed_scsi_cmnd;
1da177e4 2378 }
1da177e4 2379
c41f8cbd
SS		 2380 retval = zfcp_fsf_req_send(req);
2381 if (unlikely(retval))
2382 goto failed_scsi_cmnd;
1da177e4 2383
c41f8cbd 2384 goto out;
1da177e4 2385
c41f8cbd 2386failed_scsi_cmnd:
f3450c7b 2387 put_device(&unit->sysfs_device);
c41f8cbd
SS		 2388 zfcp_fsf_req_free(req);
2389 scsi_cmnd->host_scribble = NULL;
2390out:
564e1c86 2391 spin_unlock(&qdio->req_q_lock);
c41f8cbd 2392 return retval;
1da177e4
LT		 2393}
2394
2395/**
c41f8cbd 2396 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2397 * @unit: pointer to struct zfcp_unit
2398 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2399 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2400 */
63caf367 2401struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2402{
44cc76f2 2403 struct qdio_buffer_element *sbale;
c41f8cbd 2404 struct zfcp_fsf_req *req = NULL;
4318e08c 2405 struct fcp_cmnd *fcp_cmnd;
564e1c86 2406 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
1da177e4 2407
c41f8cbd
SS		 2408 if (unlikely(!(atomic_read(&unit->status) &
2409 ZFCP_STATUS_COMMON_UNBLOCKED)))
2410 return NULL;
1da177e4 2411
564e1c86
SS		 2412 spin_lock_bh(&qdio->req_q_lock);
2413 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2414 goto out;
09a46c6e 2415
564e1c86
SS		 2416 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2417 qdio->adapter->pool.scsi_req);
09a46c6e 2418
633528c3
SS		 2419 if (IS_ERR(req)) {
2420 req = NULL;
c41f8cbd 2421 goto out;
633528c3 2422 }
1da177e4 2423
c41f8cbd
SS		 2424 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2425 req->data = unit;
2426 req->handler = zfcp_fsf_send_fcp_command_handler;
2427 req->qtcb->header.lun_handle = unit->handle;
2428 req->qtcb->header.port_handle = unit->port->handle;
2429 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2430 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
4318e08c 2431 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
c41f8cbd 2432
564e1c86 2433 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 2434 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2435 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2436
4318e08c
CS		 2437 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2438 zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
1da177e4 2439
c41f8cbd
SS		 2440 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2441 if (!zfcp_fsf_req_send(req))
2442 goto out;
1da177e4 2443
c41f8cbd
SS		 2444 zfcp_fsf_req_free(req);
2445 req = NULL;
2446out:
564e1c86 2447 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 2448 return req;
2449}
1da177e4 2450
c41f8cbd
SS		 2451static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2452{
1da177e4
LT		 2453}
2454
c41f8cbd
SS		 2455/**
2456 * zfcp_fsf_control_file - control file upload/download
2457 * @adapter: pointer to struct zfcp_adapter
2458 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2459 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2460 */
c41f8cbd
SS		 2461struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2462 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2463{
44cc76f2 2464 struct qdio_buffer_element *sbale;
564e1c86 2465 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 2466 struct zfcp_fsf_req *req = NULL;
2467 struct fsf_qtcb_bottom_support *bottom;
2468 int direction, retval = -EIO, bytes;
2469
2470 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2471 return ERR_PTR(-EOPNOTSUPP);
2472
2473 switch (fsf_cfdc->command) {
2474 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2475 direction = SBAL_FLAGS0_TYPE_WRITE;
2476 break;
2477 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2478 direction = SBAL_FLAGS0_TYPE_READ;
2479 break;
2480 default:
2481 return ERR_PTR(-EINVAL);
2482 }
1da177e4 2483
564e1c86
SS		 2484 spin_lock_bh(&qdio->req_q_lock);
2485 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2486 goto out;
1da177e4 2487
564e1c86 2488 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
025270f0 2489 if (IS_ERR(req)) {
c41f8cbd
SS		 2490 retval = -EPERM;
2491 goto out;
2492 }
1da177e4 2493
c41f8cbd 2494 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2495
564e1c86 2496 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2497 sbale[0].flags |= direction;
8a36e453 2498
c41f8cbd
SS		 2499 bottom = &req->qtcb->bottom.support;
2500 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2501 bottom->option = fsf_cfdc->option;
8a36e453 2502
564e1c86
SS		 2503 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2504 direction, fsf_cfdc->sg,
2505 FSF_MAX_SBALS_PER_REQ);
c41f8cbd 2506 if (bytes != ZFCP_CFDC_MAX_SIZE) {
c41f8cbd
SS		 2507 zfcp_fsf_req_free(req);
2508 goto out;
2509 }
1da177e4 2510
c41f8cbd
SS		 2511 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2512 retval = zfcp_fsf_req_send(req);
2513out:
564e1c86 2514 spin_unlock_bh(&qdio->req_q_lock);
8a36e453 2515
c41f8cbd 2516 if (!retval) {
058b8647 2517 wait_for_completion(&req->completion);
c41f8cbd 2518 return req;
1da177e4 2519 }
c41f8cbd 2520 return ERR_PTR(retval);
1da177e4 2521}
bd63eaf4
SS		 2522
2523/**
2524 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2525 * @adapter: pointer to struct zfcp_adapter
2526 * @sbal_idx: response queue index of SBAL to be processed
2527 */
564e1c86 2528void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
bd63eaf4 2529{
564e1c86
SS		 2530 struct zfcp_adapter *adapter = qdio->adapter;
2531 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
bd63eaf4
SS		 2532 struct qdio_buffer_element *sbale;
2533 struct zfcp_fsf_req *fsf_req;
2534 unsigned long flags, req_id;
2535 int idx;
2536
2537 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2538
2539 sbale = &sbal->element[idx];
2540 req_id = (unsigned long) sbale->addr;
2541 spin_lock_irqsave(&adapter->req_list_lock, flags);
2542 fsf_req = zfcp_reqlist_find(adapter, req_id);
2543
2544 if (!fsf_req)
2545 /*
2546 * Unknown request means that we have potentially memory
2547 * corruption and must stop the machine immediately.
2548 */
2549 panic("error: unknown req_id (%lx) on adapter %s.\n",
2550 req_id, dev_name(&adapter->ccw_device->dev));
2551
2552 list_del(&fsf_req->list);
2553 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2554
42428f74
SS		 2555 fsf_req->queue_req.sbal_response = sbal_idx;
2556 fsf_req->queue_req.qdio_inb_usage =
564e1c86 2557 atomic_read(&qdio->resp_q.count);
bd63eaf4
SS		 2558 zfcp_fsf_req_complete(fsf_req);
2559
2560 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2561 break;
2562 }
2563}
Linux 6.x block layer and io_uring tree(s)