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[SCSI] zfcp: Improve ELS ADISC handling
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4 1/*
553448f6 2 * zfcp device driver
1da177e4 3 *
553448f6 4 * Implementation of FSF commands.
1da177e4 5 *
a2fa0aed 6 * Copyright IBM Corporation 2002, 2009
1da177e4
LT		 7 */
8
ecf39d42
CS		 9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
0997f1c5 12#include <linux/blktrace_api.h>
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;
800c0cad 131 int d_id = ntoh24(sr_buf->d_id);
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;
800c0cad 497 fc_host_port_id(shost) = ntoh24(bottom->s_id);
c41f8cbd
SS		 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:
800c0cad 509 adapter->peer_d_id = ntoh24(bottom->peer_d_id);
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 963 struct zfcp_adapter *adapter = req->adapter;
7c7dc196 964 struct zfcp_fsf_ct_els *ct = req->data;
c41f8cbd 965 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 966
7c7dc196 967 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);
7c7dc196 975 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:
7c7dc196
CS		 1007 if (ct->handler)
1008 ct->handler(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 */
7c7dc196
CS		 1097int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port,
1098 struct zfcp_fsf_ct_els *ct, mempool_t *pool)
1da177e4 1099{
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
7c7dc196 1125 zfcp_dbf_san_ct_request(req, wka_port->d_id);
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{
7c7dc196 1142 struct zfcp_fsf_ct_els *send_els = req->data;
c41f8cbd
SS		 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:
1da177e4 1162 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1163 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1164 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1165 break;
1da177e4
LT		 1166 }
1167 break;
1da177e4 1168 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1169 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1170 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1171 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1172 break;
1da177e4 1173 case FSF_ACCESS_DENIED:
dc577d55
CS		 1174 if (port)
1175 zfcp_fsf_access_denied_port(req, port);
1da177e4 1176 break;
c41f8cbd
SS		 1177 case FSF_SBAL_MISMATCH:
1178 /* should never occure, avoided in zfcp_fsf_send_els */
1179 /* fall through */
1da177e4 1180 default:
c41f8cbd 1181 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1182 break;
1183 }
1da177e4 1184skip_fsfstatus:
aa551daf 1185 if (send_els->handler)
1da177e4 1186 send_els->handler(send_els->handler_data);
c41f8cbd 1187}
1da177e4 1188
c41f8cbd
SS		 1189/**
1190 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1191 * @els: pointer to struct zfcp_send_els with data for the command
1192 */
7c7dc196
CS		 1193int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id,
1194 struct zfcp_fsf_ct_els *els)
c41f8cbd
SS		 1195{
1196 struct zfcp_fsf_req *req;
7c7dc196 1197 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 1198 int ret = -EIO;
1199
564e1c86
SS		 1200 spin_lock_bh(&qdio->req_q_lock);
1201 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1202 goto out;
09a46c6e 1203
564e1c86 1204 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
09a46c6e 1205
025270f0 1206 if (IS_ERR(req)) {
c41f8cbd
SS		 1207 ret = PTR_ERR(req);
1208 goto out;
1209 }
1210
09a46c6e 1211 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985 1212 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
44cc76f2 1213
c41f8cbd
SS		 1214 if (ret)
1215 goto failed_send;
1216
7c7dc196 1217 hton24(req->qtcb->bottom.support.d_id, d_id);
c41f8cbd 1218 req->handler = zfcp_fsf_send_els_handler;
c41f8cbd
SS		 1219 req->data = els;
1220
5771710b 1221 zfcp_dbf_san_els_request(req);
c41f8cbd 1222
c41f8cbd
SS		 1223 ret = zfcp_fsf_req_send(req);
1224 if (ret)
1225 goto failed_send;
1226
1227 goto out;
1228
1229failed_send:
1230 zfcp_fsf_req_free(req);
1231out:
564e1c86 1232 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1233 return ret;
1da177e4
LT		 1234}
1235
c41f8cbd 1236int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1237{
44cc76f2 1238 struct qdio_buffer_element *sbale;
c41f8cbd 1239 struct zfcp_fsf_req *req;
564e1c86 1240 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1241 int retval = -EIO;
1242
564e1c86
SS		 1243 spin_lock_bh(&qdio->req_q_lock);
1244 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1245 goto out;
09a46c6e 1246
564e1c86
SS		 1247 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1248 qdio->adapter->pool.erp_req);
09a46c6e 1249
025270f0 1250 if (IS_ERR(req)) {
c41f8cbd
SS		 1251 retval = PTR_ERR(req);
1252 goto out;
1da177e4
LT		 1253 }
1254
09a46c6e 1255 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1256 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1257 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1258 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1259
c41f8cbd 1260 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1261 FSF_FEATURE_CFDC |
1262 FSF_FEATURE_LUN_SHARING |
9eb69aff 1263 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1264 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1265 req->erp_action = erp_action;
1266 req->handler = zfcp_fsf_exchange_config_data_handler;
1267 erp_action->fsf_req = req;
1da177e4 1268
287ac01a 1269 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1270 retval = zfcp_fsf_req_send(req);
1da177e4 1271 if (retval) {
c41f8cbd 1272 zfcp_fsf_req_free(req);
1da177e4 1273 erp_action->fsf_req = NULL;
1da177e4 1274 }
c41f8cbd 1275out:
564e1c86 1276 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1277 return retval;
1278}
1da177e4 1279
564e1c86 1280int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1281 struct fsf_qtcb_bottom_config *data)
52ef11a7 1282{
44cc76f2 1283 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1284 struct zfcp_fsf_req *req = NULL;
1285 int retval = -EIO;
1286
564e1c86
SS		 1287 spin_lock_bh(&qdio->req_q_lock);
1288 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1289 goto out_unlock;
c41f8cbd 1290
564e1c86 1291 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
09a46c6e 1292
025270f0 1293 if (IS_ERR(req)) {
c41f8cbd 1294 retval = PTR_ERR(req);
ada81b74 1295 goto out_unlock;
52ef11a7
SS		 1296 }
1297
564e1c86 1298 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1299 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1300 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1301 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1302
c41f8cbd 1303 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1304 FSF_FEATURE_CFDC |
1305 FSF_FEATURE_LUN_SHARING |
1306 FSF_FEATURE_NOTIFICATION_LOST |
1307 FSF_FEATURE_UPDATE_ALERT;
1308
1309 if (data)
c41f8cbd 1310 req->data = data;
52ef11a7 1311
c41f8cbd
SS		 1312 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1313 retval = zfcp_fsf_req_send(req);
564e1c86 1314 spin_unlock_bh(&qdio->req_q_lock);
553448f6 1315 if (!retval)
058b8647 1316 wait_for_completion(&req->completion);
52ef11a7 1317
c41f8cbd 1318 zfcp_fsf_req_free(req);
ada81b74 1319 return retval;
52ef11a7 1320
ada81b74 1321out_unlock:
564e1c86 1322 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1323 return retval;
1324}
1325
1da177e4
LT		 1326/**
1327 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1328 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1329 * Returns: 0 on success, error otherwise
1da177e4 1330 */
c41f8cbd 1331int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1332{
564e1c86 1333 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
44cc76f2 1334 struct qdio_buffer_element *sbale;
c41f8cbd 1335 struct zfcp_fsf_req *req;
c41f8cbd 1336 int retval = -EIO;
1da177e4 1337
564e1c86 1338 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1339 return -EOPNOTSUPP;
1da177e4 1340
564e1c86
SS		 1341 spin_lock_bh(&qdio->req_q_lock);
1342 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1343 goto out;
09a46c6e 1344
564e1c86
SS		 1345 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1346 qdio->adapter->pool.erp_req);
09a46c6e 1347
025270f0 1348 if (IS_ERR(req)) {
c41f8cbd
SS		 1349 retval = PTR_ERR(req);
1350 goto out;
aef4a983
MS		 1351 }
1352
09a46c6e 1353 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1354 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1355 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1356 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1357
c41f8cbd
SS		 1358 req->handler = zfcp_fsf_exchange_port_data_handler;
1359 req->erp_action = erp_action;
1360 erp_action->fsf_req = req;
52ef11a7 1361
287ac01a 1362 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1363 retval = zfcp_fsf_req_send(req);
1da177e4 1364 if (retval) {
c41f8cbd 1365 zfcp_fsf_req_free(req);
52ef11a7
SS		 1366 erp_action->fsf_req = NULL;
1367 }
c41f8cbd 1368out:
564e1c86 1369 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1370 return retval;
1371}
1372
52ef11a7
SS		 1373/**
1374 * zfcp_fsf_exchange_port_data_sync - request information about local port
564e1c86 1375 * @qdio: pointer to struct zfcp_qdio
c41f8cbd
SS		 1376 * @data: pointer to struct fsf_qtcb_bottom_port
1377 * Returns: 0 on success, error otherwise
52ef11a7 1378 */
564e1c86 1379int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1380 struct fsf_qtcb_bottom_port *data)
52ef11a7 1381{
44cc76f2 1382 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1383 struct zfcp_fsf_req *req = NULL;
1384 int retval = -EIO;
52ef11a7 1385
564e1c86 1386 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1387 return -EOPNOTSUPP;
52ef11a7 1388
564e1c86
SS		 1389 spin_lock_bh(&qdio->req_q_lock);
1390 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1391 goto out_unlock;
c41f8cbd 1392
564e1c86 1393 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
09a46c6e 1394
025270f0 1395 if (IS_ERR(req)) {
c41f8cbd 1396 retval = PTR_ERR(req);
ada81b74 1397 goto out_unlock;
1da177e4
LT		 1398 }
1399
52ef11a7 1400 if (data)
c41f8cbd 1401 req->data = data;
52ef11a7 1402
564e1c86 1403 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1404 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1405 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1406
c41f8cbd
SS		 1407 req->handler = zfcp_fsf_exchange_port_data_handler;
1408 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1409 retval = zfcp_fsf_req_send(req);
564e1c86 1410 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1411
553448f6 1412 if (!retval)
058b8647
SS		 1413 wait_for_completion(&req->completion);
1414
c41f8cbd 1415 zfcp_fsf_req_free(req);
1da177e4 1416
1da177e4 1417 return retval;
ada81b74
CS		 1418
1419out_unlock:
564e1c86 1420 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1421 return retval;
1da177e4
LT		 1422}
1423
c41f8cbd 1424static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1425{
c41f8cbd
SS		 1426 struct zfcp_port *port = req->data;
1427 struct fsf_qtcb_header *header = &req->qtcb->header;
9d05ce2c 1428 struct fc_els_flogi *plogi;
1da177e4 1429
c41f8cbd 1430 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a17c5855 1431 goto out;
1da177e4 1432
1da177e4 1433 switch (header->fsf_status) {
1da177e4 1434 case FSF_PORT_ALREADY_OPEN:
1da177e4 1435 break;
1da177e4 1436 case FSF_ACCESS_DENIED:
c41f8cbd 1437 zfcp_fsf_access_denied_port(req, port);
1da177e4 1438 break;
1da177e4 1439 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1440 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1441 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1442 "remote port 0x%016Lx\n",
1443 (unsigned long long)port->wwpn);
5ffd51a5 1444 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1445 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1446 break;
1da177e4 1447 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1448 switch (header->fsf_status_qual.word[0]) {
1449 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1450 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1451 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1452 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1453 break;
1454 }
1455 break;
1da177e4 1456 case FSF_GOOD:
1da177e4 1457 port->handle = header->port_handle;
1da177e4
LT		 1458 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1459 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1460 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1461 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1462 &port->status);
1da177e4
LT		 1463 /* check whether D_ID has changed during open */
1464 /*
1465 * FIXME: This check is not airtight, as the FCP channel does
1466 * not monitor closures of target port connections caused on
1467 * the remote side. Thus, they might miss out on invalidating
1468 * locally cached WWPNs (and other N_Port parameters) of gone
1469 * target ports. So, our heroic attempt to make things safe
1470 * could be undermined by 'open port' response data tagged with
1471 * obsolete WWPNs. Another reason to monitor potential
1472 * connection closures ourself at least (by interpreting
1473 * incoming ELS' and unsolicited status). It just crosses my
1474 * mind that one should be able to cross-check by means of
1475 * another GID_PN straight after a port has been opened.
1476 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1477 */
9d05ce2c 1478 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
39eb7e9a 1479 if (req->qtcb->bottom.support.els1_length >=
9d05ce2c 1480 FSF_PLOGI_MIN_LEN)
c41f8cbd 1481 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4 1482 break;
1da177e4 1483 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1484 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1485 break;
1486 }
a17c5855
MP		 1487
1488out:
f3450c7b 1489 put_device(&port->sysfs_device);
1da177e4
LT		 1490}
1491
c41f8cbd
SS		 1492/**
1493 * zfcp_fsf_open_port - create and send open port request
1494 * @erp_action: pointer to struct zfcp_erp_action
1495 * Returns: 0 on success, error otherwise
1da177e4 1496 */
c41f8cbd 1497int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1498{
44cc76f2 1499 struct qdio_buffer_element *sbale;
564e1c86 1500 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
a17c5855 1501 struct zfcp_port *port = erp_action->port;
564e1c86 1502 struct zfcp_fsf_req *req;
c41f8cbd
SS		 1503 int retval = -EIO;
1504
564e1c86
SS		 1505 spin_lock_bh(&qdio->req_q_lock);
1506 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1507 goto out;
1508
564e1c86
SS		 1509 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1510 qdio->adapter->pool.erp_req);
09a46c6e 1511
025270f0 1512 if (IS_ERR(req)) {
c41f8cbd 1513 retval = PTR_ERR(req);
1da177e4 1514 goto out;
c41f8cbd 1515 }
1da177e4 1516
09a46c6e 1517 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1518 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1519 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1520 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1521
c41f8cbd 1522 req->handler = zfcp_fsf_open_port_handler;
800c0cad 1523 hton24(req->qtcb->bottom.support.d_id, port->d_id);
a17c5855 1524 req->data = port;
c41f8cbd
SS		 1525 req->erp_action = erp_action;
1526 erp_action->fsf_req = req;
f3450c7b 1527 get_device(&port->sysfs_device);
c41f8cbd 1528
287ac01a 1529 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1530 retval = zfcp_fsf_req_send(req);
1da177e4 1531 if (retval) {
c41f8cbd 1532 zfcp_fsf_req_free(req);
1da177e4 1533 erp_action->fsf_req = NULL;
f3450c7b 1534 put_device(&port->sysfs_device);
1da177e4 1535 }
c41f8cbd 1536out:
564e1c86 1537 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1538 return retval;
1539}
1540
c41f8cbd 1541static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1542{
c41f8cbd 1543 struct zfcp_port *port = req->data;
1da177e4 1544
c41f8cbd 1545 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1546 return;
1da177e4 1547
c41f8cbd 1548 switch (req->qtcb->header.fsf_status) {
1da177e4 1549 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1550 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1551 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1552 break;
1da177e4 1553 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1554 break;
1da177e4 1555 case FSF_GOOD:
5ffd51a5 1556 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1557 ZFCP_STATUS_COMMON_OPEN,
1558 ZFCP_CLEAR);
1da177e4 1559 break;
1da177e4 1560 }
1da177e4
LT		 1561}
1562
c41f8cbd
SS		 1563/**
1564 * zfcp_fsf_close_port - create and send close port request
1565 * @erp_action: pointer to struct zfcp_erp_action
1566 * Returns: 0 on success, error otherwise
1da177e4 1567 */
c41f8cbd 1568int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1569{
44cc76f2 1570 struct qdio_buffer_element *sbale;
564e1c86 1571 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1572 struct zfcp_fsf_req *req;
1573 int retval = -EIO;
1574
564e1c86
SS		 1575 spin_lock_bh(&qdio->req_q_lock);
1576 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1577 goto out;
1578
564e1c86
SS		 1579 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1580 qdio->adapter->pool.erp_req);
09a46c6e 1581
025270f0 1582 if (IS_ERR(req)) {
c41f8cbd 1583 retval = PTR_ERR(req);
1da177e4 1584 goto out;
c41f8cbd 1585 }
1da177e4 1586
09a46c6e 1587 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1588 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1589 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1590 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1591
c41f8cbd
SS		 1592 req->handler = zfcp_fsf_close_port_handler;
1593 req->data = erp_action->port;
1594 req->erp_action = erp_action;
1595 req->qtcb->header.port_handle = erp_action->port->handle;
1596 erp_action->fsf_req = req;
c41f8cbd 1597
287ac01a 1598 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1599 retval = zfcp_fsf_req_send(req);
1da177e4 1600 if (retval) {
c41f8cbd 1601 zfcp_fsf_req_free(req);
1da177e4 1602 erp_action->fsf_req = NULL;
1da177e4 1603 }
c41f8cbd 1604out:
564e1c86 1605 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1606 return retval;
1607}
1608
5ab944f9
SS		 1609static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1610{
bd0072ec 1611 struct zfcp_fc_wka_port *wka_port = req->data;
5ab944f9
SS		 1612 struct fsf_qtcb_header *header = &req->qtcb->header;
1613
1614 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
bd0072ec 1615 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
5ab944f9
SS		 1616 goto out;
1617 }
1618
1619 switch (header->fsf_status) {
1620 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1621 dev_warn(&req->adapter->ccw_device->dev,
1622 "Opening WKA port 0x%x failed\n", wka_port->d_id);
dceab655 1623 /* fall through */
5ab944f9
SS		 1624 case FSF_ADAPTER_STATUS_AVAILABLE:
1625 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
dceab655 1626 /* fall through */
5ab944f9 1627 case FSF_ACCESS_DENIED:
bd0072ec 1628 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
5ab944f9 1629 break;
5ab944f9
SS		 1630 case FSF_GOOD:
1631 wka_port->handle = header->port_handle;
27f492cc
SS		 1632 /* fall through */
1633 case FSF_PORT_ALREADY_OPEN:
bd0072ec 1634 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE;
5ab944f9
SS		 1635 }
1636out:
1637 wake_up(&wka_port->completion_wq);
1638}
1639
1640/**
1641 * zfcp_fsf_open_wka_port - create and send open wka-port request
bd0072ec 1642 * @wka_port: pointer to struct zfcp_fc_wka_port
5ab944f9
SS		 1643 * Returns: 0 on success, error otherwise
1644 */
bd0072ec 1645int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port)
5ab944f9
SS		 1646{
1647 struct qdio_buffer_element *sbale;
564e1c86 1648 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1649 struct zfcp_fsf_req *req;
1650 int retval = -EIO;
1651
564e1c86
SS		 1652 spin_lock_bh(&qdio->req_q_lock);
1653 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1654 goto out;
1655
564e1c86
SS		 1656 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1657 qdio->adapter->pool.erp_req);
09a46c6e 1658
5ab944f9
SS		 1659 if (unlikely(IS_ERR(req))) {
1660 retval = PTR_ERR(req);
1661 goto out;
1662 }
1663
09a46c6e 1664 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1665 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1666 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1667 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1668
1669 req->handler = zfcp_fsf_open_wka_port_handler;
800c0cad 1670 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id);
5ab944f9
SS		 1671 req->data = wka_port;
1672
1673 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1674 retval = zfcp_fsf_req_send(req);
1675 if (retval)
1676 zfcp_fsf_req_free(req);
1677out:
564e1c86 1678 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1679 return retval;
1680}
1681
1682static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1683{
bd0072ec 1684 struct zfcp_fc_wka_port *wka_port = req->data;
5ab944f9
SS		 1685
1686 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1687 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1688 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1689 }
1690
bd0072ec 1691 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
5ab944f9
SS		 1692 wake_up(&wka_port->completion_wq);
1693}
1694
1695/**
1696 * zfcp_fsf_close_wka_port - create and send close wka port request
bd0072ec 1697 * @wka_port: WKA port to open
5ab944f9
SS		 1698 * Returns: 0 on success, error otherwise
1699 */
bd0072ec 1700int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port)
5ab944f9
SS		 1701{
1702 struct qdio_buffer_element *sbale;
564e1c86 1703 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1704 struct zfcp_fsf_req *req;
1705 int retval = -EIO;
1706
564e1c86
SS		 1707 spin_lock_bh(&qdio->req_q_lock);
1708 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1709 goto out;
1710
564e1c86
SS		 1711 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1712 qdio->adapter->pool.erp_req);
09a46c6e 1713
5ab944f9
SS		 1714 if (unlikely(IS_ERR(req))) {
1715 retval = PTR_ERR(req);
1716 goto out;
1717 }
1718
09a46c6e 1719 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1720 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1721 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1722 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1723
1724 req->handler = zfcp_fsf_close_wka_port_handler;
1725 req->data = wka_port;
1726 req->qtcb->header.port_handle = wka_port->handle;
1727
1728 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1729 retval = zfcp_fsf_req_send(req);
1730 if (retval)
1731 zfcp_fsf_req_free(req);
1732out:
564e1c86 1733 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1734 return retval;
1735}
1736
c41f8cbd 1737static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1738{
c41f8cbd
SS		 1739 struct zfcp_port *port = req->data;
1740 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1741 struct zfcp_unit *unit;
1da177e4 1742
c41f8cbd 1743 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1744 return;
1da177e4 1745
1da177e4 1746 switch (header->fsf_status) {
1da177e4 1747 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1748 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1749 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1750 break;
1da177e4 1751 case FSF_ACCESS_DENIED:
c41f8cbd 1752 zfcp_fsf_access_denied_port(req, port);
1da177e4 1753 break;
1da177e4 1754 case FSF_PORT_BOXED:
5c815d15
CS		 1755 /* can't use generic zfcp_erp_modify_port_status because
1756 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1757 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
ecf0c772
SS		 1758 read_lock(&port->unit_list_lock);
1759 list_for_each_entry(unit, &port->unit_list, list)
5c815d15
CS		 1760 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1761 &unit->status);
ecf0c772 1762 read_unlock(&port->unit_list_lock);
dfb3cf00
SS		 1763 zfcp_erp_port_boxed(port, "fscpph2", req);
1764 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1765 ZFCP_STATUS_FSFREQ_RETRY;
1766
1da177e4 1767 break;
1da177e4 1768 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1769 switch (header->fsf_status_qual.word[0]) {
1770 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1771 /* fall through */
1da177e4 1772 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1773 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1774 break;
1da177e4
LT		 1775 }
1776 break;
1da177e4 1777 case FSF_GOOD:
1da177e4
LT		 1778 /* can't use generic zfcp_erp_modify_port_status because
1779 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1780 */
1781 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
ecf0c772
SS		 1782 read_lock(&port->unit_list_lock);
1783 list_for_each_entry(unit, &port->unit_list, list)
c41f8cbd
SS		 1784 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1785 &unit->status);
ecf0c772 1786 read_unlock(&port->unit_list_lock);
1da177e4 1787 break;
1da177e4 1788 }
1da177e4
LT		 1789}
1790
c41f8cbd
SS		 1791/**
1792 * zfcp_fsf_close_physical_port - close physical port
1793 * @erp_action: pointer to struct zfcp_erp_action
1794 * Returns: 0 on success
1da177e4 1795 */
c41f8cbd 1796int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1797{
44cc76f2 1798 struct qdio_buffer_element *sbale;
564e1c86 1799 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1800 struct zfcp_fsf_req *req;
1801 int retval = -EIO;
1802
564e1c86
SS		 1803 spin_lock_bh(&qdio->req_q_lock);
1804 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1805 goto out;
1da177e4 1806
564e1c86
SS		 1807 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1808 qdio->adapter->pool.erp_req);
09a46c6e 1809
025270f0 1810 if (IS_ERR(req)) {
c41f8cbd
SS		 1811 retval = PTR_ERR(req);
1812 goto out;
1813 }
1da177e4 1814
09a46c6e 1815 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1816 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 1817 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1818 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1819
c41f8cbd
SS		 1820 req->data = erp_action->port;
1821 req->qtcb->header.port_handle = erp_action->port->handle;
1822 req->erp_action = erp_action;
1823 req->handler = zfcp_fsf_close_physical_port_handler;
1824 erp_action->fsf_req = req;
c41f8cbd 1825
287ac01a 1826 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1827 retval = zfcp_fsf_req_send(req);
1da177e4 1828 if (retval) {
c41f8cbd 1829 zfcp_fsf_req_free(req);
1da177e4 1830 erp_action->fsf_req = NULL;
1da177e4 1831 }
c41f8cbd 1832out:
564e1c86 1833 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1834 return retval;
1835}
1836
c41f8cbd 1837static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1838{
c41f8cbd
SS		 1839 struct zfcp_adapter *adapter = req->adapter;
1840 struct zfcp_unit *unit = req->data;
1841 struct fsf_qtcb_header *header = &req->qtcb->header;
1842 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1843 struct fsf_queue_designator *queue_designator =
1844 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1845 int exclusive, readwrite;
1da177e4 1846
c41f8cbd 1847 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1848 return;
1da177e4 1849
1da177e4 1850 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1851 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1852 ZFCP_STATUS_UNIT_SHARED |
1853 ZFCP_STATUS_UNIT_READONLY,
1854 &unit->status);
1855
1da177e4
LT		 1856 switch (header->fsf_status) {
1857
1858 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1859 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1860 /* fall through */
1da177e4 1861 case FSF_LUN_ALREADY_OPEN:
1da177e4 1862 break;
1da177e4 1863 case FSF_ACCESS_DENIED:
c41f8cbd 1864 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1865 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1866 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1867 break;
1da177e4 1868 case FSF_PORT_BOXED:
5ffd51a5 1869 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1870 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1871 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1872 break;
1da177e4 1873 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1874 if (header->fsf_status_qual.word[0])
553448f6 1875 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1876 "LUN 0x%Lx on port 0x%Lx is already in "
1877 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1878 (unsigned long long)unit->fcp_lun,
1879 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1880 queue_designator->cssid,
1881 queue_designator->hla);
c41f8cbd 1882 else
553448f6
CS		 1883 zfcp_act_eval_err(adapter,
1884 header->fsf_status_qual.word[2]);
5ffd51a5 1885 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1886 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1887 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1888 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1889 break;
1da177e4 1890 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1891 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1892 "No handle is available for LUN "
1893 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1894 (unsigned long long)unit->fcp_lun,
1895 (unsigned long long)unit->port->wwpn);
5ffd51a5 1896 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1897 /* fall through */
1898 case FSF_INVALID_COMMAND_OPTION:
1899 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1900 break;
1da177e4 1901 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1902 switch (header->fsf_status_qual.word[0]) {
1903 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 1904 zfcp_fc_test_link(unit->port);
c41f8cbd 1905 /* fall through */
1da177e4 1906 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1907 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1908 break;
1da177e4
LT		 1909 }
1910 break;
1911
1da177e4 1912 case FSF_GOOD:
1da177e4 1913 unit->handle = header->lun_handle;
1da177e4 1914 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1915
1916 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1917 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
6fcf41d1 1918 !zfcp_ccw_priv_sch(adapter)) {
aef4a983
MS		 1919 exclusive = (bottom->lun_access_info &
1920 FSF_UNIT_ACCESS_EXCLUSIVE);
1921 readwrite = (bottom->lun_access_info &
1922 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1923
1da177e4
LT		 1924 if (!exclusive)
1925 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1926 &unit->status);
1927
1928 if (!readwrite) {
1929 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1930 &unit->status);
c41f8cbd 1931 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1932 "SCSI device at LUN 0x%016Lx on port "
1933 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1934 (unsigned long long)unit->fcp_lun,
1935 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1936 }
1937
1938 if (exclusive && !readwrite) {
c41f8cbd 1939 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1940 "Exclusive read-only access not "
1941 "supported (unit 0x%016Lx, "
1942 "port 0x%016Lx)\n",
7ba58c9c
SS		 1943 (unsigned long long)unit->fcp_lun,
1944 (unsigned long long)unit->port->wwpn);
5ffd51a5 1945 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1946 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1947 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1948 } else if (!exclusive && readwrite) {
c41f8cbd 1949 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1950 "Shared read-write access not "
1951 "supported (unit 0x%016Lx, port "
27c3f0a6 1952 "0x%016Lx)\n",
7ba58c9c
SS		 1953 (unsigned long long)unit->fcp_lun,
1954 (unsigned long long)unit->port->wwpn);
5ffd51a5 1955 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1956 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1957 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1958 }
1959 }
1da177e4 1960 break;
1da177e4 1961 }
1da177e4
LT		 1962}
1963
c41f8cbd
SS		 1964/**
1965 * zfcp_fsf_open_unit - open unit
1966 * @erp_action: pointer to struct zfcp_erp_action
1967 * Returns: 0 on success, error otherwise
1da177e4 1968 */
c41f8cbd 1969int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1970{
44cc76f2 1971 struct qdio_buffer_element *sbale;
c41f8cbd 1972 struct zfcp_adapter *adapter = erp_action->adapter;
564e1c86 1973 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 1974 struct zfcp_fsf_req *req;
1975 int retval = -EIO;
1976
564e1c86
SS		 1977 spin_lock_bh(&qdio->req_q_lock);
1978 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1979 goto out;
1da177e4 1980
564e1c86 1981 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
a4623c46 1982 adapter->pool.erp_req);
09a46c6e 1983
025270f0 1984 if (IS_ERR(req)) {
c41f8cbd
SS		 1985 retval = PTR_ERR(req);
1986 goto out;
1987 }
1988
09a46c6e 1989 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1990 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1991 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1992 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1993
c41f8cbd
SS		 1994 req->qtcb->header.port_handle = erp_action->port->handle;
1995 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1996 req->handler = zfcp_fsf_open_unit_handler;
1997 req->data = erp_action->unit;
1998 req->erp_action = erp_action;
1999 erp_action->fsf_req = req;
2000
2001 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2002 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2003
287ac01a 2004 zfcp_fsf_start_erp_timer(req);
c41f8cbd 2005 retval = zfcp_fsf_req_send(req);
1da177e4 2006 if (retval) {
c41f8cbd 2007 zfcp_fsf_req_free(req);
1da177e4 2008 erp_action->fsf_req = NULL;
1da177e4 2009 }
c41f8cbd 2010out:
564e1c86 2011 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 2012 return retval;
2013}
2014
c41f8cbd 2015static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 2016{
c41f8cbd 2017 struct zfcp_unit *unit = req->data;
1da177e4 2018
c41f8cbd 2019 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 2020 return;
1da177e4 2021
c41f8cbd 2022 switch (req->qtcb->header.fsf_status) {
1da177e4 2023 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2024 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 2025 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2026 break;
1da177e4 2027 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2028 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 2029 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2030 break;
1da177e4 2031 case FSF_PORT_BOXED:
5ffd51a5 2032 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 2033 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2034 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 2035 break;
1da177e4 2036 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 2037 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 2038 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 2039 zfcp_fc_test_link(unit->port);
c41f8cbd 2040 /* fall through */
1da177e4 2041 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 2042 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2043 break;
2044 }
2045 break;
1da177e4 2046 case FSF_GOOD:
1da177e4 2047 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2048 break;
1da177e4 2049 }
1da177e4
LT		 2050}
2051
2052/**
c41f8cbd
SS		 2053 * zfcp_fsf_close_unit - close zfcp unit
2054 * @erp_action: pointer to struct zfcp_unit
2055 * Returns: 0 on success, error otherwise
1da177e4 2056 */
c41f8cbd 2057int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2058{
44cc76f2 2059 struct qdio_buffer_element *sbale;
564e1c86 2060 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 2061 struct zfcp_fsf_req *req;
2062 int retval = -EIO;
1da177e4 2063
564e1c86
SS		 2064 spin_lock_bh(&qdio->req_q_lock);
2065 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 2066 goto out;
09a46c6e 2067
564e1c86
SS		 2068 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2069 qdio->adapter->pool.erp_req);
09a46c6e 2070
025270f0 2071 if (IS_ERR(req)) {
c41f8cbd
SS		 2072 retval = PTR_ERR(req);
2073 goto out;
2074 }
1da177e4 2075
09a46c6e 2076 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 2077 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2078 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2079 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2080
c41f8cbd
SS		 2081 req->qtcb->header.port_handle = erp_action->port->handle;
2082 req->qtcb->header.lun_handle = erp_action->unit->handle;
2083 req->handler = zfcp_fsf_close_unit_handler;
2084 req->data = erp_action->unit;
2085 req->erp_action = erp_action;
2086 erp_action->fsf_req = req;
fdf23452 2087
287ac01a 2088 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2089 retval = zfcp_fsf_req_send(req);
2090 if (retval) {
2091 zfcp_fsf_req_free(req);
2092 erp_action->fsf_req = NULL;
2093 }
2094out:
564e1c86 2095 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 2096 return retval;
1da177e4
LT		 2097}
2098
c9615858
CS		 2099static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2100{
2101 lat_rec->sum += lat;
c41f8cbd
SS		 2102 lat_rec->min = min(lat_rec->min, lat);
2103 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2104}
2105
d9742b42 2106static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
c9615858 2107{
d9742b42
CS		 2108 struct fsf_qual_latency_info *lat_in;
2109 struct latency_cont *lat = NULL;
c41f8cbd 2110 struct zfcp_unit *unit = req->unit;
d9742b42
CS		 2111 struct zfcp_blk_drv_data blktrc;
2112 int ticks = req->adapter->timer_ticks;
c9615858 2113
d9742b42 2114 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2115
d9742b42
CS		 2116 blktrc.flags = 0;
2117 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2118 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2119 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2120 blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2121 blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2122
2123 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2124 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2125 blktrc.channel_lat = lat_in->channel_lat * ticks;
2126 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2127
2128 switch (req->qtcb->bottom.io.data_direction) {
2129 case FSF_DATADIR_READ:
2130 lat = &unit->latencies.read;
2131 break;
2132 case FSF_DATADIR_WRITE:
2133 lat = &unit->latencies.write;
2134 break;
2135 case FSF_DATADIR_CMND:
2136 lat = &unit->latencies.cmd;
2137 break;
2138 }
1da177e4 2139
d9742b42
CS		 2140 if (lat) {
2141 spin_lock(&unit->latencies.lock);
2142 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2143 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2144 lat->counter++;
2145 spin_unlock(&unit->latencies.lock);
2146 }
0997f1c5 2147 }
0997f1c5 2148
d9742b42
CS		 2149 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2150 sizeof(blktrc));
0997f1c5 2151}
0997f1c5 2152
c41f8cbd 2153static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2154{
0ac55aa9 2155 struct scsi_cmnd *scpnt;
4318e08c 2156 struct fcp_resp_with_ext *fcp_rsp;
1da177e4 2157 unsigned long flags;
1da177e4 2158
c41f8cbd
SS		 2159 read_lock_irqsave(&req->adapter->abort_lock, flags);
2160
0ac55aa9
SS		 2161 scpnt = req->data;
2162 if (unlikely(!scpnt)) {
2163 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2164 return;
2165 }
2166
c41f8cbd 2167 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2168 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2169 goto skip_fsfstatus;
2170 }
2171
c41f8cbd 2172 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2173 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2174 goto skip_fsfstatus;
2175 }
2176
4318e08c
CS		 2177 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2178 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
1da177e4 2179
d9742b42 2180 zfcp_fsf_req_trace(req, scpnt);
0997f1c5 2181
c41f8cbd 2182skip_fsfstatus:
8a36e453 2183 if (scpnt->result != 0)
5771710b 2184 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
8a36e453 2185 else if (scpnt->retries > 0)
5771710b 2186 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
8a36e453 2187 else
5771710b 2188 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
1da177e4 2189
1da177e4 2190 scpnt->host_scribble = NULL;
1da177e4 2191 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2192 /*
2193 * We must hold this lock until scsi_done has been called.
2194 * Otherwise we may call scsi_done after abort regarding this
2195 * command has completed.
2196 * Note: scsi_done must not block!
2197 */
c41f8cbd 2198 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2199}
2200
c41f8cbd 2201static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2202{
4318e08c
CS		 2203 struct fcp_resp_with_ext *fcp_rsp;
2204 struct fcp_resp_rsp_info *rsp_info;
1da177e4 2205
4318e08c
CS		 2206 fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
2207 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
2208
2209 if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
c41f8cbd
SS		 2210 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2211 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2212}
2213
2214
2215static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2216{
2217 struct zfcp_unit *unit;
2218 struct fsf_qtcb_header *header = &req->qtcb->header;
2219
2220 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2221 unit = req->data;
2222 else
2223 unit = req->unit;
2224
2225 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2226 goto skip_fsfstatus;
1da177e4 2227
c41f8cbd
SS		 2228 switch (header->fsf_status) {
2229 case FSF_HANDLE_MISMATCH:
2230 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2231 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2232 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2233 break;
2234 case FSF_FCPLUN_NOT_VALID:
2235 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2236 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2237 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2238 break;
c41f8cbd
SS		 2239 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2240 zfcp_fsf_class_not_supp(req);
1da177e4 2241 break;
c41f8cbd
SS		 2242 case FSF_ACCESS_DENIED:
2243 zfcp_fsf_access_denied_unit(req, unit);
2244 break;
2245 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2246 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2247 "Incorrect direction %d, unit 0x%016Lx on port "
2248 "0x%016Lx closed\n",
c41f8cbd 2249 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2250 (unsigned long long)unit->fcp_lun,
2251 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2252 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2253 req);
c41f8cbd
SS		 2254 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2255 break;
2256 case FSF_CMND_LENGTH_NOT_VALID:
2257 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2258 "Incorrect CDB length %d, unit 0x%016Lx on "
2259 "port 0x%016Lx closed\n",
c41f8cbd 2260 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2261 (unsigned long long)unit->fcp_lun,
2262 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2263 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2264 req);
c41f8cbd
SS		 2265 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2266 break;
2267 case FSF_PORT_BOXED:
5ffd51a5 2268 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2269 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2270 ZFCP_STATUS_FSFREQ_RETRY;
2271 break;
2272 case FSF_LUN_BOXED:
5ffd51a5 2273 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2274 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2275 ZFCP_STATUS_FSFREQ_RETRY;
2276 break;
2277 case FSF_ADAPTER_STATUS_AVAILABLE:
2278 if (header->fsf_status_qual.word[0] ==
2279 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
6f53a2d2 2280 zfcp_fc_test_link(unit->port);
c41f8cbd 2281 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2282 break;
1da177e4 2283 }
c41f8cbd
SS		 2284skip_fsfstatus:
2285 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2286 zfcp_fsf_send_fcp_ctm_handler(req);
2287 else {
2288 zfcp_fsf_send_fcp_command_task_handler(req);
2289 req->unit = NULL;
f3450c7b 2290 put_device(&unit->sysfs_device);
c41f8cbd 2291 }
1da177e4
LT		 2292}
2293
c41f8cbd
SS		 2294/**
2295 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2296 * @unit: unit where command is sent to
2297 * @scsi_cmnd: scsi command to be sent
1da177e4 2298 */
63caf367
CS		 2299int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2300 struct scsi_cmnd *scsi_cmnd)
1da177e4 2301{
c41f8cbd 2302 struct zfcp_fsf_req *req;
4318e08c 2303 struct fcp_cmnd *fcp_cmnd;
bc90c863 2304 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
c41f8cbd 2305 int real_bytes, retval = -EIO;
63caf367 2306 struct zfcp_adapter *adapter = unit->port->adapter;
564e1c86 2307 struct zfcp_qdio *qdio = adapter->qdio;
1da177e4 2308
c41f8cbd
SS		 2309 if (unlikely(!(atomic_read(&unit->status) &
2310 ZFCP_STATUS_COMMON_UNBLOCKED)))
2311 return -EBUSY;
1da177e4 2312
564e1c86
SS		 2313 spin_lock(&qdio->req_q_lock);
2314 if (atomic_read(&qdio->req_q.count) <= 0) {
2315 atomic_inc(&qdio->req_q_full);
c41f8cbd 2316 goto out;
8fdf30d5 2317 }
09a46c6e 2318
564e1c86 2319 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
a4623c46 2320 adapter->pool.scsi_req);
09a46c6e 2321
025270f0 2322 if (IS_ERR(req)) {
c41f8cbd
SS		 2323 retval = PTR_ERR(req);
2324 goto out;
2325 }
2326
09a46c6e 2327 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
f3450c7b 2328 get_device(&unit->sysfs_device);
c41f8cbd
SS		 2329 req->unit = unit;
2330 req->data = scsi_cmnd;
2331 req->handler = zfcp_fsf_send_fcp_command_handler;
2332 req->qtcb->header.lun_handle = unit->handle;
2333 req->qtcb->header.port_handle = unit->port->handle;
2334 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
4318e08c 2335 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
c41f8cbd
SS		 2336
2337 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2338
c41f8cbd
SS		 2339 /*
2340 * set depending on data direction:
2341 * data direction bits in SBALE (SB Type)
2342 * data direction bits in QTCB
c41f8cbd
SS		 2343 */
2344 switch (scsi_cmnd->sc_data_direction) {
2345 case DMA_NONE:
2346 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
1da177e4 2347 break;
c41f8cbd
SS		 2348 case DMA_FROM_DEVICE:
2349 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
c41f8cbd
SS		 2350 break;
2351 case DMA_TO_DEVICE:
2352 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2353 sbtype = SBAL_FLAGS0_TYPE_WRITE;
1da177e4 2354 break;
c41f8cbd 2355 case DMA_BIDIRECTIONAL:
c41f8cbd 2356 goto failed_scsi_cmnd;
1da177e4
LT		 2357 }
2358
4318e08c
CS		 2359 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2360 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd);
1da177e4 2361
564e1c86 2362 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
c41f8cbd
SS		 2363 scsi_sglist(scsi_cmnd),
2364 FSF_MAX_SBALS_PER_REQ);
2365 if (unlikely(real_bytes < 0)) {
42428f74 2366 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
c41f8cbd 2367 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2368 "Oversize data package, unit 0x%016Lx "
2369 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2370 (unsigned long long)unit->fcp_lun,
2371 (unsigned long long)unit->port->wwpn);
5ffd51a5 2372 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2373 retval = -EINVAL;
2374 }
2375 goto failed_scsi_cmnd;
1da177e4 2376 }
1da177e4 2377
c41f8cbd
SS		 2378 retval = zfcp_fsf_req_send(req);
2379 if (unlikely(retval))
2380 goto failed_scsi_cmnd;
1da177e4 2381
c41f8cbd 2382 goto out;
1da177e4 2383
c41f8cbd 2384failed_scsi_cmnd:
f3450c7b 2385 put_device(&unit->sysfs_device);
c41f8cbd
SS		 2386 zfcp_fsf_req_free(req);
2387 scsi_cmnd->host_scribble = NULL;
2388out:
564e1c86 2389 spin_unlock(&qdio->req_q_lock);
c41f8cbd 2390 return retval;
1da177e4
LT		 2391}
2392
2393/**
c41f8cbd 2394 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2395 * @unit: pointer to struct zfcp_unit
2396 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2397 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2398 */
63caf367 2399struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2400{
44cc76f2 2401 struct qdio_buffer_element *sbale;
c41f8cbd 2402 struct zfcp_fsf_req *req = NULL;
4318e08c 2403 struct fcp_cmnd *fcp_cmnd;
564e1c86 2404 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
1da177e4 2405
c41f8cbd
SS		 2406 if (unlikely(!(atomic_read(&unit->status) &
2407 ZFCP_STATUS_COMMON_UNBLOCKED)))
2408 return NULL;
1da177e4 2409
564e1c86
SS		 2410 spin_lock_bh(&qdio->req_q_lock);
2411 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2412 goto out;
09a46c6e 2413
564e1c86
SS		 2414 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2415 qdio->adapter->pool.scsi_req);
09a46c6e 2416
633528c3
SS		 2417 if (IS_ERR(req)) {
2418 req = NULL;
c41f8cbd 2419 goto out;
633528c3 2420 }
1da177e4 2421
c41f8cbd
SS		 2422 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2423 req->data = unit;
2424 req->handler = zfcp_fsf_send_fcp_command_handler;
2425 req->qtcb->header.lun_handle = unit->handle;
2426 req->qtcb->header.port_handle = unit->port->handle;
2427 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2428 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
4318e08c 2429 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN;
c41f8cbd 2430
564e1c86 2431 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 2432 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2433 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2434
4318e08c
CS		 2435 fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd;
2436 zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags);
1da177e4 2437
c41f8cbd
SS		 2438 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2439 if (!zfcp_fsf_req_send(req))
2440 goto out;
1da177e4 2441
c41f8cbd
SS		 2442 zfcp_fsf_req_free(req);
2443 req = NULL;
2444out:
564e1c86 2445 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 2446 return req;
2447}
1da177e4 2448
c41f8cbd
SS		 2449static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2450{
1da177e4
LT		 2451}
2452
c41f8cbd
SS		 2453/**
2454 * zfcp_fsf_control_file - control file upload/download
2455 * @adapter: pointer to struct zfcp_adapter
2456 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2457 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2458 */
c41f8cbd
SS		 2459struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2460 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2461{
44cc76f2 2462 struct qdio_buffer_element *sbale;
564e1c86 2463 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 2464 struct zfcp_fsf_req *req = NULL;
2465 struct fsf_qtcb_bottom_support *bottom;
2466 int direction, retval = -EIO, bytes;
2467
2468 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2469 return ERR_PTR(-EOPNOTSUPP);
2470
2471 switch (fsf_cfdc->command) {
2472 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2473 direction = SBAL_FLAGS0_TYPE_WRITE;
2474 break;
2475 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2476 direction = SBAL_FLAGS0_TYPE_READ;
2477 break;
2478 default:
2479 return ERR_PTR(-EINVAL);
2480 }
1da177e4 2481
564e1c86
SS		 2482 spin_lock_bh(&qdio->req_q_lock);
2483 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2484 goto out;
1da177e4 2485
564e1c86 2486 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
025270f0 2487 if (IS_ERR(req)) {
c41f8cbd
SS		 2488 retval = -EPERM;
2489 goto out;
2490 }
1da177e4 2491
c41f8cbd 2492 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2493
564e1c86 2494 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2495 sbale[0].flags |= direction;
8a36e453 2496
c41f8cbd
SS		 2497 bottom = &req->qtcb->bottom.support;
2498 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2499 bottom->option = fsf_cfdc->option;
8a36e453 2500
564e1c86
SS		 2501 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2502 direction, fsf_cfdc->sg,
2503 FSF_MAX_SBALS_PER_REQ);
c41f8cbd 2504 if (bytes != ZFCP_CFDC_MAX_SIZE) {
c41f8cbd
SS		 2505 zfcp_fsf_req_free(req);
2506 goto out;
2507 }
1da177e4 2508
c41f8cbd
SS		 2509 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2510 retval = zfcp_fsf_req_send(req);
2511out:
564e1c86 2512 spin_unlock_bh(&qdio->req_q_lock);
8a36e453 2513
c41f8cbd 2514 if (!retval) {
058b8647 2515 wait_for_completion(&req->completion);
c41f8cbd 2516 return req;
1da177e4 2517 }
c41f8cbd 2518 return ERR_PTR(retval);
1da177e4 2519}
bd63eaf4
SS		 2520
2521/**
2522 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2523 * @adapter: pointer to struct zfcp_adapter
2524 * @sbal_idx: response queue index of SBAL to be processed
2525 */
564e1c86 2526void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
bd63eaf4 2527{
564e1c86
SS		 2528 struct zfcp_adapter *adapter = qdio->adapter;
2529 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
bd63eaf4
SS		 2530 struct qdio_buffer_element *sbale;
2531 struct zfcp_fsf_req *fsf_req;
2532 unsigned long flags, req_id;
2533 int idx;
2534
2535 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2536
2537 sbale = &sbal->element[idx];
2538 req_id = (unsigned long) sbale->addr;
2539 spin_lock_irqsave(&adapter->req_list_lock, flags);
2540 fsf_req = zfcp_reqlist_find(adapter, req_id);
2541
2542 if (!fsf_req)
2543 /*
2544 * Unknown request means that we have potentially memory
2545 * corruption and must stop the machine immediately.
2546 */
2547 panic("error: unknown req_id (%lx) on adapter %s.\n",
2548 req_id, dev_name(&adapter->ccw_device->dev));
2549
2550 list_del(&fsf_req->list);
2551 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2552
42428f74
SS		 2553 fsf_req->queue_req.sbal_response = sbal_idx;
2554 fsf_req->queue_req.qdio_inb_usage =
564e1c86 2555 atomic_read(&qdio->resp_q.count);
bd63eaf4
SS		 2556 zfcp_fsf_req_complete(fsf_req);
2557
2558 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2559 break;
2560 }
2561}
Linux kernel - Deliverables
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