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[SCSI] zfcp: Dont fail SCSI commands when transitioning to blocked fc_rport
[deliverable/linux.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4 1/*
553448f6 2 * zfcp device driver
1da177e4 3 *
553448f6 4 * Implementation of FSF commands.
1da177e4 5 *
a2fa0aed 6 * Copyright IBM Corporation 2002, 2009
1da177e4
LT		 7 */
8
ecf39d42
CS		 9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
0997f1c5 12#include <linux/blktrace_api.h>
1da177e4 13#include "zfcp_ext.h"
dcd20e23 14#include "zfcp_dbf.h"
1da177e4 15
287ac01a
CS		 16static void zfcp_fsf_request_timeout_handler(unsigned long data)
17{
18 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
5ffd51a5
SS		 19 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
20 "fsrth_1", NULL);
287ac01a
CS		 21}
22
23static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
24 unsigned long timeout)
25{
26 fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
27 fsf_req->timer.data = (unsigned long) fsf_req->adapter;
28 fsf_req->timer.expires = jiffies + timeout;
29 add_timer(&fsf_req->timer);
30}
31
32static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
33{
34 BUG_ON(!fsf_req->erp_action);
35 fsf_req->timer.function = zfcp_erp_timeout_handler;
36 fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
37 fsf_req->timer.expires = jiffies + 30 * HZ;
38 add_timer(&fsf_req->timer);
39}
40
1da177e4
LT		 41/* association between FSF command and FSF QTCB type */
42static u32 fsf_qtcb_type[] = {
43 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND,
44 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND,
45 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND,
46 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND,
47 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND,
48 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND,
49 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND,
50 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND,
51 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND,
52 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
53 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND,
54 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
55 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND
56};
57
553448f6
CS		 58static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
59{
c41f8cbd 60 u16 subtable = table >> 16;
553448f6 61 u16 rule = table & 0xffff;
ff3b24fa 62 const char *act_type[] = { "unknown", "OS", "WWPN", "DID", "LUN" };
553448f6 63
ff3b24fa 64 if (subtable && subtable < ARRAY_SIZE(act_type))
553448f6 65 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 66 "Access denied according to ACT rule type %s, "
67 "rule %d\n", act_type[subtable], rule);
553448f6
CS		 68}
69
70static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
71 struct zfcp_port *port)
72{
73 struct fsf_qtcb_header *header = &req->qtcb->header;
74 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 75 "Access denied to port 0x%016Lx\n",
7ba58c9c 76 (unsigned long long)port->wwpn);
553448f6
CS		 77 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
78 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
5ffd51a5 79 zfcp_erp_port_access_denied(port, "fspad_1", req);
553448f6
CS		 80 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
81}
82
83static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req,
84 struct zfcp_unit *unit)
85{
86 struct fsf_qtcb_header *header = &req->qtcb->header;
87 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 88 "Access denied to unit 0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 89 (unsigned long long)unit->fcp_lun,
90 (unsigned long long)unit->port->wwpn);
553448f6
CS		 91 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]);
92 zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]);
5ffd51a5 93 zfcp_erp_unit_access_denied(unit, "fsuad_1", req);
553448f6
CS		 94 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
95}
96
97static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req)
98{
ff3b24fa
CS		 99 dev_err(&req->adapter->ccw_device->dev, "FCP device not "
100 "operational because of an unsupported FC class\n");
5ffd51a5 101 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1", req);
553448f6
CS		 102 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
103}
104
c41f8cbd
SS		 105/**
106 * zfcp_fsf_req_free - free memory used by fsf request
107 * @fsf_req: pointer to struct zfcp_fsf_req
1da177e4 108 */
c41f8cbd 109void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
1da177e4 110{
c41f8cbd 111 if (likely(req->pool)) {
a4623c46
SS		 112 if (likely(req->qtcb))
113 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool);
c41f8cbd 114 mempool_free(req, req->pool);
dd52e0ea
HC		 115 return;
116 }
117
a4623c46
SS		 118 if (likely(req->qtcb))
119 kmem_cache_free(zfcp_data.qtcb_cache, req->qtcb);
120 kfree(req);
1da177e4
LT		 121}
122
c41f8cbd 123static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
1da177e4 124{
ecf0c772 125 unsigned long flags;
c41f8cbd
SS		 126 struct fsf_status_read_buffer *sr_buf = req->data;
127 struct zfcp_adapter *adapter = req->adapter;
128 struct zfcp_port *port;
129 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
1da177e4 130
ecf0c772
SS		 131 read_lock_irqsave(&adapter->port_list_lock, flags);
132 list_for_each_entry(port, &adapter->port_list, list)
c41f8cbd 133 if (port->d_id == d_id) {
5ffd51a5 134 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
ecf0c772 135 break;
c41f8cbd 136 }
ecf0c772 137 read_unlock_irqrestore(&adapter->port_list_lock, flags);
1da177e4
LT		 138}
139
5ffd51a5 140static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
c41f8cbd 141 struct fsf_link_down_info *link_down)
aef4a983 142{
c41f8cbd 143 struct zfcp_adapter *adapter = req->adapter;
698ec016 144
c41f8cbd 145 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
ee69ab7a
MS		 146 return;
147
148 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
70932935 149
a2fa0aed 150 zfcp_scsi_schedule_rports_block(adapter);
ee69ab7a 151
c41f8cbd 152 if (!link_down)
2f8f3ed5 153 goto out;
ee69ab7a 154
aef4a983
MS		 155 switch (link_down->error_code) {
156 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 157 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 158 "There is no light signal from the local "
159 "fibre channel cable\n");
aef4a983
MS		 160 break;
161 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 162 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 163 "There is a wrap plug instead of a fibre "
164 "channel cable\n");
aef4a983
MS		 165 break;
166 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 167 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 168 "The adjacent fibre channel node does not "
169 "support FCP\n");
aef4a983
MS		 170 break;
171 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 172 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 173 "The FCP device is suspended because of a "
174 "firmware update\n");
553448f6 175 break;
aef4a983 176 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 177 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 178 "The FCP device detected a WWPN that is "
179 "duplicate or not valid\n");
aef4a983
MS		 180 break;
181 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 182 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 183 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 184 break;
185 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 186 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 187 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 188 break;
189 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 190 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 191 "The adjacent switch cannot support "
192 "more NPIV ports\n");
aef4a983
MS		 193 break;
194 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 195 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 196 "The FCP adapter could not log in to the "
197 "fibre channel fabric\n");
aef4a983
MS		 198 break;
199 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 200 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 201 "The WWPN assignment file on the FCP adapter "
202 "has been damaged\n");
aef4a983
MS		 203 break;
204 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 205 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 206 "The mode table on the FCP adapter "
207 "has been damaged\n");
aef4a983
MS		 208 break;
209 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 210 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 211 "All NPIV ports on the FCP adapter have "
212 "been assigned\n");
aef4a983
MS		 213 break;
214 default:
c41f8cbd 215 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 216 "The link between the FCP adapter and "
217 "the FC fabric is down\n");
aef4a983 218 }
c41f8cbd
SS		 219out:
220 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 221}
222
c41f8cbd 223static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 224{
c41f8cbd
SS		 225 struct fsf_status_read_buffer *sr_buf = req->data;
226 struct fsf_link_down_info *ldi =
227 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 228
c41f8cbd
SS		 229 switch (sr_buf->status_subtype) {
230 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
5ffd51a5 231 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
1da177e4 232 break;
c41f8cbd 233 case FSF_STATUS_READ_SUB_FDISC_FAILED:
5ffd51a5 234 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
1da177e4 235 break;
c41f8cbd 236 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
5ffd51a5 237 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
c41f8cbd
SS		 238 };
239}
1da177e4 240
c41f8cbd
SS		 241static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
242{
243 struct zfcp_adapter *adapter = req->adapter;
244 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 245
c41f8cbd 246 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
5771710b 247 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
a4623c46 248 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd
SS		 249 zfcp_fsf_req_free(req);
250 return;
251 }
1da177e4 252
5771710b 253 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
1da177e4 254
c41f8cbd
SS		 255 switch (sr_buf->status_type) {
256 case FSF_STATUS_READ_PORT_CLOSED:
257 zfcp_fsf_status_read_port_closed(req);
1da177e4 258 break;
c41f8cbd
SS		 259 case FSF_STATUS_READ_INCOMING_ELS:
260 zfcp_fc_incoming_els(req);
1da177e4 261 break;
c41f8cbd 262 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 263 break;
c41f8cbd 264 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 265 dev_warn(&adapter->ccw_device->dev,
266 "The error threshold for checksum statistics "
267 "has been exceeded\n");
5771710b 268 zfcp_dbf_hba_berr(adapter->dbf, req);
1da177e4 269 break;
c41f8cbd
SS		 270 case FSF_STATUS_READ_LINK_DOWN:
271 zfcp_fsf_status_read_link_down(req);
272 break;
273 case FSF_STATUS_READ_LINK_UP:
274 dev_info(&adapter->ccw_device->dev,
ff3b24fa 275 "The local link has been restored\n");
c41f8cbd 276 /* All ports should be marked as ready to run again */
5ffd51a5 277 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
c41f8cbd
SS		 278 ZFCP_STATUS_COMMON_RUNNING,
279 ZFCP_SET);
280 zfcp_erp_adapter_reopen(adapter,
281 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
282 ZFCP_STATUS_COMMON_ERP_FAILED,
5ffd51a5 283 "fssrh_2", req);
c41f8cbd
SS		 284 break;
285 case FSF_STATUS_READ_NOTIFICATION_LOST:
286 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
5ffd51a5
SS		 287 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
288 req);
c41f8cbd 289 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
9eae07ef 290 queue_work(adapter->work_queue, &adapter->scan_work);
c41f8cbd
SS		 291 break;
292 case FSF_STATUS_READ_CFDC_UPDATED:
5ffd51a5 293 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
c41f8cbd
SS		 294 break;
295 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
296 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 297 break;
1da177e4
LT		 298 }
299
a4623c46 300 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd 301 zfcp_fsf_req_free(req);
1da177e4 302
c41f8cbd 303 atomic_inc(&adapter->stat_miss);
4544683a 304 queue_work(adapter->work_queue, &adapter->stat_work);
c41f8cbd 305}
1da177e4 306
c41f8cbd
SS		 307static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
308{
309 switch (req->qtcb->header.fsf_status_qual.word[0]) {
310 case FSF_SQ_FCP_RSP_AVAILABLE:
311 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
312 case FSF_SQ_NO_RETRY_POSSIBLE:
313 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
314 return;
315 case FSF_SQ_COMMAND_ABORTED:
316 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
317 break;
318 case FSF_SQ_NO_RECOM:
319 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 320 "The FCP adapter reported a problem "
321 "that cannot be recovered\n");
5ffd51a5 322 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
c41f8cbd
SS		 323 break;
324 }
325 /* all non-return stats set FSFREQ_ERROR*/
326 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 327}
328
c41f8cbd 329static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 330{
c41f8cbd
SS		 331 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
332 return;
1da177e4 333
c41f8cbd
SS		 334 switch (req->qtcb->header.fsf_status) {
335 case FSF_UNKNOWN_COMMAND:
336 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 337 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd 338 req->qtcb->header.fsf_command);
5ffd51a5 339 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
c41f8cbd
SS		 340 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
341 break;
342 case FSF_ADAPTER_STATUS_AVAILABLE:
343 zfcp_fsf_fsfstatus_qual_eval(req);
344 break;
345 }
346}
1da177e4 347
c41f8cbd
SS		 348static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
349{
350 struct zfcp_adapter *adapter = req->adapter;
351 struct fsf_qtcb *qtcb = req->qtcb;
352 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 353
5771710b 354 zfcp_dbf_hba_fsf_response(req);
1da177e4 355
c41f8cbd
SS		 356 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
357 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
358 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
359 return;
360 }
1da177e4 361
c41f8cbd
SS		 362 switch (qtcb->prefix.prot_status) {
363 case FSF_PROT_GOOD:
364 case FSF_PROT_FSF_STATUS_PRESENTED:
365 return;
366 case FSF_PROT_QTCB_VERSION_ERROR:
367 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 368 "QTCB version 0x%x not supported by FCP adapter "
369 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
370 psq->word[0], psq->word[1]);
5ffd51a5 371 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
c41f8cbd
SS		 372 break;
373 case FSF_PROT_ERROR_STATE:
374 case FSF_PROT_SEQ_NUMB_ERROR:
5ffd51a5 375 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
c41f8cbd
SS		 376 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
377 break;
378 case FSF_PROT_UNSUPP_QTCB_TYPE:
379 dev_err(&adapter->ccw_device->dev,
ff3b24fa 380 "The QTCB type is not supported by the FCP adapter\n");
5ffd51a5 381 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
c41f8cbd
SS		 382 break;
383 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
384 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
385 &adapter->status);
386 break;
387 case FSF_PROT_DUPLICATE_REQUEST_ID:
388 dev_err(&adapter->ccw_device->dev,
ff3b24fa 389 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd 390 (unsigned long long)qtcb->bottom.support.req_handle);
5ffd51a5 391 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
c41f8cbd
SS		 392 break;
393 case FSF_PROT_LINK_DOWN:
5ffd51a5
SS		 394 zfcp_fsf_link_down_info_eval(req, "fspse_5",
395 &psq->link_down_info);
c41f8cbd 396 /* FIXME: reopening adapter now? better wait for link up */
5ffd51a5 397 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
c41f8cbd
SS		 398 break;
399 case FSF_PROT_REEST_QUEUE:
400 /* All ports should be marked as ready to run again */
5ffd51a5 401 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
c41f8cbd
SS		 402 ZFCP_STATUS_COMMON_RUNNING,
403 ZFCP_SET);
404 zfcp_erp_adapter_reopen(adapter,
405 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
5ffd51a5
SS		 406 ZFCP_STATUS_COMMON_ERP_FAILED,
407 "fspse_8", req);
c41f8cbd
SS		 408 break;
409 default:
410 dev_err(&adapter->ccw_device->dev,
ff3b24fa 411 "0x%x is not a valid transfer protocol status\n",
c41f8cbd 412 qtcb->prefix.prot_status);
5ffd51a5 413 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
c41f8cbd
SS		 414 }
415 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 416}
417
c41f8cbd
SS		 418/**
419 * zfcp_fsf_req_complete - process completion of a FSF request
420 * @fsf_req: The FSF request that has been completed.
421 *
422 * When a request has been completed either from the FCP adapter,
423 * or it has been dismissed due to a queue shutdown, this function
424 * is called to process the completion status and trigger further
425 * events related to the FSF request.
426 */
bd63eaf4 427static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
1da177e4 428{
c41f8cbd
SS		 429 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
430 zfcp_fsf_status_read_handler(req);
431 return;
432 }
1da177e4 433
c41f8cbd
SS		 434 del_timer(&req->timer);
435 zfcp_fsf_protstatus_eval(req);
436 zfcp_fsf_fsfstatus_eval(req);
437 req->handler(req);
1da177e4 438
c41f8cbd 439 if (req->erp_action)
287ac01a 440 zfcp_erp_notify(req->erp_action, 0);
1da177e4 441
c41f8cbd
SS		 442 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
443 zfcp_fsf_req_free(req);
444 else
058b8647 445 complete(&req->completion);
c41f8cbd 446}
1da177e4 447
bd63eaf4
SS		 448/**
449 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
450 * @adapter: pointer to struct zfcp_adapter
451 *
452 * Never ever call this without shutting down the adapter first.
453 * Otherwise the adapter would continue using and corrupting s390 storage.
454 * Included BUG_ON() call to ensure this is done.
455 * ERP is supposed to be the only user of this function.
456 */
457void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
458{
459 struct zfcp_fsf_req *req, *tmp;
460 unsigned long flags;
461 LIST_HEAD(remove_queue);
462 unsigned int i;
463
464 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
465 spin_lock_irqsave(&adapter->req_list_lock, flags);
466 for (i = 0; i < REQUEST_LIST_SIZE; i++)
467 list_splice_init(&adapter->req_list[i], &remove_queue);
468 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
469
470 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
471 list_del(&req->list);
472 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
473 zfcp_fsf_req_complete(req);
474 }
475}
476
c41f8cbd
SS		 477static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
478{
479 struct fsf_qtcb_bottom_config *bottom;
480 struct zfcp_adapter *adapter = req->adapter;
481 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 482
c41f8cbd 483 bottom = &req->qtcb->bottom.config;
1da177e4 484
c41f8cbd
SS		 485 if (req->data)
486 memcpy(req->data, bottom, sizeof(*bottom));
487
488 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
489 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
490 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
491 fc_host_speed(shost) = bottom->fc_link_speed;
492 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
493
494 adapter->hydra_version = bottom->adapter_type;
495 adapter->timer_ticks = bottom->timer_interval;
496
497 if (fc_host_permanent_port_name(shost) == -1)
498 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
499
500 switch (bottom->fc_topology) {
501 case FSF_TOPO_P2P:
502 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
503 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
504 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
505 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
c41f8cbd
SS		 506 break;
507 case FSF_TOPO_FABRIC:
508 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
c41f8cbd
SS		 509 break;
510 case FSF_TOPO_AL:
511 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
dceab655 512 /* fall through */
c41f8cbd 513 default:
c41f8cbd 514 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 515 "Unknown or unsupported arbitrated loop "
516 "fibre channel topology detected\n");
5ffd51a5 517 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
c41f8cbd 518 return -EIO;
1da177e4 519 }
c41f8cbd 520
1da177e4
LT		 521 return 0;
522}
523
c41f8cbd 524static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
553448f6
CS		 525{
526 struct zfcp_adapter *adapter = req->adapter;
c41f8cbd
SS		 527 struct fsf_qtcb *qtcb = req->qtcb;
528 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
529 struct Scsi_Host *shost = adapter->scsi_host;
553448f6 530
c41f8cbd
SS		 531 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
532 return;
1da177e4 533
c41f8cbd
SS		 534 adapter->fsf_lic_version = bottom->lic_version;
535 adapter->adapter_features = bottom->adapter_features;
536 adapter->connection_features = bottom->connection_features;
537 adapter->peer_wwpn = 0;
538 adapter->peer_wwnn = 0;
539 adapter->peer_d_id = 0;
8a36e453 540
c41f8cbd
SS		 541 switch (qtcb->header.fsf_status) {
542 case FSF_GOOD:
543 if (zfcp_fsf_exchange_config_evaluate(req))
544 return;
1da177e4 545
c41f8cbd
SS		 546 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
547 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 548 "FCP adapter maximum QTCB size (%d bytes) "
549 "is too small\n",
550 bottom->max_qtcb_size);
5ffd51a5 551 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
c41f8cbd
SS		 552 return;
553 }
554 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
555 &adapter->status);
1da177e4 556 break;
c41f8cbd
SS		 557 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
558 fc_host_node_name(shost) = 0;
559 fc_host_port_name(shost) = 0;
560 fc_host_port_id(shost) = 0;
561 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
562 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
563 adapter->hydra_version = 0;
1da177e4 564
c41f8cbd
SS		 565 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
566 &adapter->status);
1da177e4 567
5ffd51a5 568 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
c41f8cbd 569 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 570 break;
c41f8cbd 571 default:
5ffd51a5 572 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
c41f8cbd
SS		 573 return;
574 }
1da177e4 575
c41f8cbd
SS		 576 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
577 adapter->hardware_version = bottom->hardware_version;
578 memcpy(fc_host_serial_number(shost), bottom->serial_number,
579 min(FC_SERIAL_NUMBER_SIZE, 17));
580 EBCASC(fc_host_serial_number(shost),
581 min(FC_SERIAL_NUMBER_SIZE, 17));
582 }
1da177e4 583
c41f8cbd
SS		 584 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
585 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 586 "The FCP adapter only supports newer "
587 "control block versions\n");
5ffd51a5 588 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
c41f8cbd
SS		 589 return;
590 }
591 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
592 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 593 "The FCP adapter only supports older "
594 "control block versions\n");
5ffd51a5 595 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
c41f8cbd
SS		 596 }
597}
1da177e4 598
c41f8cbd
SS		 599static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
600{
601 struct zfcp_adapter *adapter = req->adapter;
602 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
603 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 604
c41f8cbd
SS		 605 if (req->data)
606 memcpy(req->data, bottom, sizeof(*bottom));
9eb69aff 607
0282985d 608 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
c41f8cbd 609 fc_host_permanent_port_name(shost) = bottom->wwpn;
0282985d
CS		 610 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
611 } else
c41f8cbd
SS		 612 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
613 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
614 fc_host_supported_speeds(shost) = bottom->supported_speed;
615}
1da177e4 616
c41f8cbd
SS		 617static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
618{
c41f8cbd
SS		 619 struct fsf_qtcb *qtcb = req->qtcb;
620
621 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
622 return;
623
624 switch (qtcb->header.fsf_status) {
625 case FSF_GOOD:
626 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 627 break;
628 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
629 zfcp_fsf_exchange_port_evaluate(req);
5ffd51a5 630 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
c41f8cbd 631 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 632 break;
1da177e4 633 }
c41f8cbd 634}
d26ab06e 635
564e1c86 636static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
c41f8cbd 637{
564e1c86 638 struct zfcp_qdio_queue *req_q = &qdio->req_q;
c41f8cbd 639
564e1c86 640 spin_lock_bh(&qdio->req_q_lock);
7001f0c4
MP		 641 if (atomic_read(&req_q->count))
642 return 1;
564e1c86 643 spin_unlock_bh(&qdio->req_q_lock);
7001f0c4
MP		 644 return 0;
645}
646
564e1c86 647static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
7001f0c4 648{
564e1c86 649 struct zfcp_adapter *adapter = qdio->adapter;
7001f0c4 650 long ret;
dedbc2b3 651
564e1c86
SS		 652 spin_unlock_bh(&qdio->req_q_lock);
653 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
654 zfcp_fsf_sbal_check(qdio), 5 * HZ);
c41f8cbd
SS		 655 if (ret > 0)
656 return 0;
cbf1ed02 657 if (!ret) {
564e1c86 658 atomic_inc(&qdio->req_q_full);
cbf1ed02
CS		 659 /* assume hanging outbound queue, try queue recovery */
660 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
661 }
7001f0c4 662
564e1c86 663 spin_lock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 664 return -EIO;
665}
666
a4623c46 667static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
c41f8cbd
SS		 668{
669 struct zfcp_fsf_req *req;
a4623c46
SS		 670
671 if (likely(pool))
672 req = mempool_alloc(pool, GFP_ATOMIC);
673 else
674 req = kmalloc(sizeof(*req), GFP_ATOMIC);
675
676 if (unlikely(!req))
c41f8cbd 677 return NULL;
a4623c46 678
c41f8cbd 679 memset(req, 0, sizeof(*req));
88f2a977 680 req->pool = pool;
c41f8cbd
SS		 681 return req;
682}
683
a4623c46 684static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
c41f8cbd 685{
a4623c46 686 struct fsf_qtcb *qtcb;
c41f8cbd
SS		 687
688 if (likely(pool))
689 qtcb = mempool_alloc(pool, GFP_ATOMIC);
690 else
a4623c46
SS		 691 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
692
c41f8cbd
SS		 693 if (unlikely(!qtcb))
694 return NULL;
695
696 memset(qtcb, 0, sizeof(*qtcb));
a4623c46 697 return qtcb;
c41f8cbd
SS		 698}
699
564e1c86 700static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
09a46c6e 701 u32 fsf_cmd, mempool_t *pool)
1da177e4 702{
44cc76f2 703 struct qdio_buffer_element *sbale;
564e1c86
SS		 704 struct zfcp_qdio_queue *req_q = &qdio->req_q;
705 struct zfcp_adapter *adapter = qdio->adapter;
a4623c46 706 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
1da177e4 707
c41f8cbd 708 if (unlikely(!req))
1e9b1643 709 return ERR_PTR(-ENOMEM);
1da177e4 710
c41f8cbd
SS		 711 if (adapter->req_no == 0)
712 adapter->req_no++;
1da177e4 713
c41f8cbd
SS		 714 INIT_LIST_HEAD(&req->list);
715 init_timer(&req->timer);
058b8647 716 init_completion(&req->completion);
1da177e4 717
c41f8cbd
SS		 718 req->adapter = adapter;
719 req->fsf_command = fsf_cmd;
52bfb558 720 req->req_id = adapter->req_no;
42428f74
SS		 721 req->queue_req.sbal_number = 1;
722 req->queue_req.sbal_first = req_q->first;
723 req->queue_req.sbal_last = req_q->first;
724 req->queue_req.sbale_curr = 1;
c41f8cbd 725
564e1c86 726 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 727 sbale[0].addr = (void *) req->req_id;
728 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
729
a4623c46
SS		 730 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
731 if (likely(pool))
732 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
733 else
734 req->qtcb = zfcp_qtcb_alloc(NULL);
735
736 if (unlikely(!req->qtcb)) {
737 zfcp_fsf_req_free(req);
738 return ERR_PTR(-ENOMEM);
739 }
740
564e1c86 741 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
c41f8cbd
SS		 742 req->qtcb->prefix.req_id = req->req_id;
743 req->qtcb->prefix.ulp_info = 26;
744 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
745 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
746 req->qtcb->header.req_handle = req->req_id;
747 req->qtcb->header.fsf_command = req->fsf_command;
748 req->seq_no = adapter->fsf_req_seq_no;
749 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
750 sbale[1].addr = (void *) req->qtcb;
751 sbale[1].length = sizeof(struct fsf_qtcb);
752 }
753
754 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
755 zfcp_fsf_req_free(req);
756 return ERR_PTR(-EIO);
757 }
951f746f 758
c41f8cbd 759 return req;
1da177e4
LT		 760}
761
c41f8cbd
SS		 762static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
763{
764 struct zfcp_adapter *adapter = req->adapter;
564e1c86 765 struct zfcp_qdio *qdio = adapter->qdio;
135ea137
MP		 766 unsigned long flags;
767 int idx;
768 int with_qtcb = (req->qtcb != NULL);
c41f8cbd
SS		 769
770 /* put allocated FSF request into hash table */
45316a86 771 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 772 idx = zfcp_reqlist_hash(req->req_id);
773 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 774 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 775
564e1c86 776 req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
c41f8cbd 777 req->issued = get_clock();
564e1c86 778 if (zfcp_qdio_send(qdio, &req->queue_req)) {
c41f8cbd 779 del_timer(&req->timer);
3765138a
CS		 780 spin_lock_irqsave(&adapter->req_list_lock, flags);
781 /* lookup request again, list might have changed */
782 if (zfcp_reqlist_find_safe(adapter, req))
783 zfcp_reqlist_remove(adapter, req);
784 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
5ffd51a5 785 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
c41f8cbd
SS		 786 return -EIO;
787 }
788
789 /* Don't increase for unsolicited status */
135ea137 790 if (with_qtcb)
c41f8cbd 791 adapter->fsf_req_seq_no++;
52bfb558 792 adapter->req_no++;
c41f8cbd
SS		 793
794 return 0;
795}
796
797/**
798 * zfcp_fsf_status_read - send status read request
799 * @adapter: pointer to struct zfcp_adapter
800 * @req_flags: request flags
801 * Returns: 0 on success, ERROR otherwise
1da177e4 802 */
564e1c86 803int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
1da177e4 804{
564e1c86 805 struct zfcp_adapter *adapter = qdio->adapter;
c41f8cbd
SS		 806 struct zfcp_fsf_req *req;
807 struct fsf_status_read_buffer *sr_buf;
44cc76f2 808 struct qdio_buffer_element *sbale;
c41f8cbd 809 int retval = -EIO;
1da177e4 810
564e1c86
SS		 811 spin_lock_bh(&qdio->req_q_lock);
812 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 813 goto out;
814
564e1c86 815 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
a4623c46 816 adapter->pool.status_read_req);
025270f0 817 if (IS_ERR(req)) {
c41f8cbd
SS		 818 retval = PTR_ERR(req);
819 goto out;
1da177e4
LT		 820 }
821
564e1c86 822 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 823 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
42428f74 824 req->queue_req.sbale_curr = 2;
c41f8cbd 825
a4623c46 826 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
c41f8cbd
SS		 827 if (!sr_buf) {
828 retval = -ENOMEM;
829 goto failed_buf;
830 }
831 memset(sr_buf, 0, sizeof(*sr_buf));
832 req->data = sr_buf;
564e1c86 833 sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
c41f8cbd
SS		 834 sbale->addr = (void *) sr_buf;
835 sbale->length = sizeof(*sr_buf);
059c97d0 836
c41f8cbd
SS		 837 retval = zfcp_fsf_req_send(req);
838 if (retval)
839 goto failed_req_send;
1da177e4 840
c41f8cbd
SS		 841 goto out;
842
843failed_req_send:
a4623c46 844 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd
SS		 845failed_buf:
846 zfcp_fsf_req_free(req);
5771710b 847 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
c41f8cbd 848out:
564e1c86 849 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 850 return retval;
851}
852
853static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
854{
855 struct zfcp_unit *unit = req->data;
856 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
857
858 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
859 return;
860
861 switch (req->qtcb->header.fsf_status) {
1da177e4 862 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 863 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5
SS		 864 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
865 "fsafch1", req);
c41f8cbd 866 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 867 }
868 break;
1da177e4 869 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd 870 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5 871 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
c41f8cbd 872 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 873 }
874 break;
1da177e4 875 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 876 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 877 break;
1da177e4 878 case FSF_PORT_BOXED:
5ffd51a5 879 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
c41f8cbd
SS		 880 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
881 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 882 break;
1da177e4 883 case FSF_LUN_BOXED:
5ffd51a5 884 zfcp_erp_unit_boxed(unit, "fsafch4", req);
c41f8cbd
SS		 885 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
886 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 887 break;
1da177e4 888 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 889 switch (fsq->word[0]) {
1da177e4 890 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 891 zfcp_fc_test_link(unit->port);
dceab655 892 /* fall through */
1da177e4 893 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 894 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 895 break;
1da177e4
LT		 896 }
897 break;
1da177e4 898 case FSF_GOOD:
c41f8cbd 899 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 900 break;
1da177e4 901 }
1da177e4
LT		 902}
903
904/**
c41f8cbd
SS		 905 * zfcp_fsf_abort_fcp_command - abort running SCSI command
906 * @old_req_id: unsigned long
c41f8cbd 907 * @unit: pointer to struct zfcp_unit
c41f8cbd 908 * Returns: pointer to struct zfcp_fsf_req
1da177e4 909 */
1da177e4 910
c41f8cbd 911struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
63caf367 912 struct zfcp_unit *unit)
1da177e4 913{
44cc76f2 914 struct qdio_buffer_element *sbale;
c41f8cbd 915 struct zfcp_fsf_req *req = NULL;
564e1c86 916 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
8a36e453 917
564e1c86
SS		 918 spin_lock_bh(&qdio->req_q_lock);
919 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 920 goto out;
564e1c86
SS		 921 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
922 qdio->adapter->pool.scsi_abort);
633528c3
SS		 923 if (IS_ERR(req)) {
924 req = NULL;
c41f8cbd 925 goto out;
633528c3 926 }
2abbe866 927
c41f8cbd
SS		 928 if (unlikely(!(atomic_read(&unit->status) &
929 ZFCP_STATUS_COMMON_UNBLOCKED)))
930 goto out_error_free;
1da177e4 931
564e1c86 932 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 933 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
934 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 935
c41f8cbd
SS		 936 req->data = unit;
937 req->handler = zfcp_fsf_abort_fcp_command_handler;
938 req->qtcb->header.lun_handle = unit->handle;
939 req->qtcb->header.port_handle = unit->port->handle;
940 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
941
942 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
943 if (!zfcp_fsf_req_send(req))
944 goto out;
945
946out_error_free:
947 zfcp_fsf_req_free(req);
948 req = NULL;
949out:
564e1c86 950 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 951 return req;
1da177e4
LT		 952}
953
c41f8cbd 954static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 955{
c41f8cbd
SS		 956 struct zfcp_adapter *adapter = req->adapter;
957 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 958 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 959
c41f8cbd 960 send_ct->status = -EINVAL;
1da177e4 961
c41f8cbd 962 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 963 goto skip_fsfstatus;
964
1da177e4 965 switch (header->fsf_status) {
1da177e4 966 case FSF_GOOD:
5771710b 967 zfcp_dbf_san_ct_response(req);
c41f8cbd 968 send_ct->status = 0;
1da177e4 969 break;
1da177e4 970 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 971 zfcp_fsf_class_not_supp(req);
1da177e4 972 break;
1da177e4 973 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 974 switch (header->fsf_status_qual.word[0]){
975 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 976 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 977 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 978 break;
1da177e4
LT		 979 }
980 break;
1da177e4 981 case FSF_ACCESS_DENIED:
1da177e4 982 break;
1da177e4 983 case FSF_PORT_BOXED:
c41f8cbd
SS		 984 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
985 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 986 break;
c41f8cbd 987 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 988 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
dceab655 989 /* fall through */
c41f8cbd 990 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 991 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 992 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 993 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 994 case FSF_SBAL_MISMATCH:
c41f8cbd 995 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 996 break;
997 }
998
999skip_fsfstatus:
c41f8cbd 1000 if (send_ct->handler)
1da177e4 1001 send_ct->handler(send_ct->handler_data);
c41f8cbd 1002}
1da177e4 1003
426f6059
CS		 1004static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1005 struct scatterlist *sg_req,
1006 struct scatterlist *sg_resp)
1007{
1008 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1009 sbale[2].addr = sg_virt(sg_req);
1010 sbale[2].length = sg_req->length;
1011 sbale[3].addr = sg_virt(sg_resp);
1012 sbale[3].length = sg_resp->length;
1013 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1014}
1015
1016static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1017{
1018 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1019}
1020
39eb7e9a
CS		 1021static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1022 struct scatterlist *sg_req,
1023 struct scatterlist *sg_resp,
1024 int max_sbals)
c41f8cbd 1025{
42428f74 1026 struct zfcp_adapter *adapter = req->adapter;
564e1c86 1027 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
42428f74
SS		 1028 &req->queue_req);
1029 u32 feat = adapter->adapter_features;
c41f8cbd
SS		 1030 int bytes;
1031
39eb7e9a 1032 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
426f6059 1033 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
39eb7e9a
CS		 1034 return -EOPNOTSUPP;
1035
426f6059
CS		 1036 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1037 return 0;
1038 }
1039
1040 /* use single, unchained SBAL if it can hold the request */
1041 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1042 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
39eb7e9a
CS		 1043 return 0;
1044 }
1045
564e1c86 1046 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
42428f74 1047 SBAL_FLAGS0_TYPE_WRITE_READ,
c41f8cbd
SS		 1048 sg_req, max_sbals);
1049 if (bytes <= 0)
9072df4d 1050 return -EIO;
c41f8cbd 1051 req->qtcb->bottom.support.req_buf_length = bytes;
42428f74 1052 req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
c41f8cbd 1053
564e1c86 1054 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
42428f74 1055 SBAL_FLAGS0_TYPE_WRITE_READ,
c41f8cbd 1056 sg_resp, max_sbals);
b1a58985 1057 req->qtcb->bottom.support.resp_buf_length = bytes;
c41f8cbd 1058 if (bytes <= 0)
9072df4d 1059 return -EIO;
98fc4d5c 1060
b1a58985
CS		 1061 return 0;
1062}
1063
1064static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1065 struct scatterlist *sg_req,
1066 struct scatterlist *sg_resp,
1067 int max_sbals)
1068{
1069 int ret;
1070
1071 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1072 if (ret)
1073 return ret;
1074
98fc4d5c 1075 /* common settings for ct/gs and els requests */
98fc4d5c
CS		 1076 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1077 req->qtcb->bottom.support.timeout = 2 * R_A_TOV;
9d38500d 1078 zfcp_fsf_start_timer(req, (2 * R_A_TOV + 10) * HZ);
c41f8cbd
SS		 1079
1080 return 0;
1da177e4
LT		 1081}
1082
1083/**
c41f8cbd
SS		 1084 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1085 * @ct: pointer to struct zfcp_send_ct with data for request
1086 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1da177e4 1087 */
799b76d0 1088int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1da177e4 1089{
5ab944f9 1090 struct zfcp_wka_port *wka_port = ct->wka_port;
564e1c86 1091 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
c41f8cbd
SS		 1092 struct zfcp_fsf_req *req;
1093 int ret = -EIO;
1da177e4 1094
564e1c86
SS		 1095 spin_lock_bh(&qdio->req_q_lock);
1096 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1097 goto out;
1da177e4 1098
564e1c86 1099 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
09a46c6e 1100
025270f0 1101 if (IS_ERR(req)) {
c41f8cbd
SS		 1102 ret = PTR_ERR(req);
1103 goto out;
3f0ca62a
CS		 1104 }
1105
09a46c6e 1106 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985
CS		 1107 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1108 FSF_MAX_SBALS_PER_REQ);
553448f6 1109 if (ret)
1da177e4 1110 goto failed_send;
1da177e4 1111
c41f8cbd 1112 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1113 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1114 req->data = ct;
1115
5771710b 1116 zfcp_dbf_san_ct_request(req);
1da177e4 1117
c41f8cbd
SS		 1118 ret = zfcp_fsf_req_send(req);
1119 if (ret)
1120 goto failed_send;
1da177e4 1121
c41f8cbd 1122 goto out;
1da177e4 1123
c41f8cbd
SS		 1124failed_send:
1125 zfcp_fsf_req_free(req);
c41f8cbd 1126out:
564e1c86 1127 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1128 return ret;
1da177e4
LT		 1129}
1130
c41f8cbd 1131static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1132{
c41f8cbd
SS		 1133 struct zfcp_send_els *send_els = req->data;
1134 struct zfcp_port *port = send_els->port;
1135 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1136
c41f8cbd 1137 send_els->status = -EINVAL;
1da177e4 1138
c41f8cbd 1139 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1140 goto skip_fsfstatus;
1141
1142 switch (header->fsf_status) {
1da177e4 1143 case FSF_GOOD:
5771710b 1144 zfcp_dbf_san_els_response(req);
c41f8cbd 1145 send_els->status = 0;
1da177e4 1146 break;
1da177e4 1147 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1148 zfcp_fsf_class_not_supp(req);
1da177e4 1149 break;
1da177e4 1150 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1151 switch (header->fsf_status_qual.word[0]){
1152 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13 1153 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
6f53a2d2 1154 zfcp_fc_test_link(port);
c41f8cbd 1155 /*fall through */
1da177e4 1156 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1157 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1158 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1159 break;
1da177e4
LT		 1160 }
1161 break;
1da177e4 1162 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1163 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1164 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1165 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1166 break;
1da177e4 1167 case FSF_ACCESS_DENIED:
dc577d55
CS		 1168 if (port)
1169 zfcp_fsf_access_denied_port(req, port);
1da177e4 1170 break;
c41f8cbd
SS		 1171 case FSF_SBAL_MISMATCH:
1172 /* should never occure, avoided in zfcp_fsf_send_els */
1173 /* fall through */
1da177e4 1174 default:
c41f8cbd 1175 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1176 break;
1177 }
1da177e4 1178skip_fsfstatus:
aa551daf 1179 if (send_els->handler)
1da177e4 1180 send_els->handler(send_els->handler_data);
c41f8cbd 1181}
1da177e4 1182
c41f8cbd
SS		 1183/**
1184 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1185 * @els: pointer to struct zfcp_send_els with data for the command
1186 */
1187int zfcp_fsf_send_els(struct zfcp_send_els *els)
1188{
1189 struct zfcp_fsf_req *req;
564e1c86 1190 struct zfcp_qdio *qdio = els->adapter->qdio;
c41f8cbd
SS		 1191 int ret = -EIO;
1192
564e1c86
SS		 1193 spin_lock_bh(&qdio->req_q_lock);
1194 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1195 goto out;
09a46c6e 1196
564e1c86 1197 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
09a46c6e 1198
025270f0 1199 if (IS_ERR(req)) {
c41f8cbd
SS		 1200 ret = PTR_ERR(req);
1201 goto out;
1202 }
1203
09a46c6e 1204 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985 1205 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
44cc76f2 1206
c41f8cbd
SS		 1207 if (ret)
1208 goto failed_send;
1209
98fc4d5c 1210 req->qtcb->bottom.support.d_id = els->d_id;
c41f8cbd 1211 req->handler = zfcp_fsf_send_els_handler;
c41f8cbd
SS		 1212 req->data = els;
1213
5771710b 1214 zfcp_dbf_san_els_request(req);
c41f8cbd 1215
c41f8cbd
SS		 1216 ret = zfcp_fsf_req_send(req);
1217 if (ret)
1218 goto failed_send;
1219
1220 goto out;
1221
1222failed_send:
1223 zfcp_fsf_req_free(req);
1224out:
564e1c86 1225 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1226 return ret;
1da177e4
LT		 1227}
1228
c41f8cbd 1229int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1230{
44cc76f2 1231 struct qdio_buffer_element *sbale;
c41f8cbd 1232 struct zfcp_fsf_req *req;
564e1c86 1233 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1234 int retval = -EIO;
1235
564e1c86
SS		 1236 spin_lock_bh(&qdio->req_q_lock);
1237 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1238 goto out;
09a46c6e 1239
564e1c86
SS		 1240 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1241 qdio->adapter->pool.erp_req);
09a46c6e 1242
025270f0 1243 if (IS_ERR(req)) {
c41f8cbd
SS		 1244 retval = PTR_ERR(req);
1245 goto out;
1da177e4
LT		 1246 }
1247
09a46c6e 1248 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1249 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1250 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1251 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1252
c41f8cbd 1253 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1254 FSF_FEATURE_CFDC |
1255 FSF_FEATURE_LUN_SHARING |
9eb69aff 1256 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1257 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1258 req->erp_action = erp_action;
1259 req->handler = zfcp_fsf_exchange_config_data_handler;
1260 erp_action->fsf_req = req;
1da177e4 1261
287ac01a 1262 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1263 retval = zfcp_fsf_req_send(req);
1da177e4 1264 if (retval) {
c41f8cbd 1265 zfcp_fsf_req_free(req);
1da177e4 1266 erp_action->fsf_req = NULL;
1da177e4 1267 }
c41f8cbd 1268out:
564e1c86 1269 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1270 return retval;
1271}
1da177e4 1272
564e1c86 1273int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1274 struct fsf_qtcb_bottom_config *data)
52ef11a7 1275{
44cc76f2 1276 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1277 struct zfcp_fsf_req *req = NULL;
1278 int retval = -EIO;
1279
564e1c86
SS		 1280 spin_lock_bh(&qdio->req_q_lock);
1281 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1282 goto out_unlock;
c41f8cbd 1283
564e1c86 1284 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
09a46c6e 1285
025270f0 1286 if (IS_ERR(req)) {
c41f8cbd 1287 retval = PTR_ERR(req);
ada81b74 1288 goto out_unlock;
52ef11a7
SS		 1289 }
1290
564e1c86 1291 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1292 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1293 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1294 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1295
c41f8cbd 1296 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1297 FSF_FEATURE_CFDC |
1298 FSF_FEATURE_LUN_SHARING |
1299 FSF_FEATURE_NOTIFICATION_LOST |
1300 FSF_FEATURE_UPDATE_ALERT;
1301
1302 if (data)
c41f8cbd 1303 req->data = data;
52ef11a7 1304
c41f8cbd
SS		 1305 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1306 retval = zfcp_fsf_req_send(req);
564e1c86 1307 spin_unlock_bh(&qdio->req_q_lock);
553448f6 1308 if (!retval)
058b8647 1309 wait_for_completion(&req->completion);
52ef11a7 1310
c41f8cbd 1311 zfcp_fsf_req_free(req);
ada81b74 1312 return retval;
52ef11a7 1313
ada81b74 1314out_unlock:
564e1c86 1315 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1316 return retval;
1317}
1318
1da177e4
LT		 1319/**
1320 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1321 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1322 * Returns: 0 on success, error otherwise
1da177e4 1323 */
c41f8cbd 1324int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1325{
564e1c86 1326 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
44cc76f2 1327 struct qdio_buffer_element *sbale;
c41f8cbd 1328 struct zfcp_fsf_req *req;
c41f8cbd 1329 int retval = -EIO;
1da177e4 1330
564e1c86 1331 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1332 return -EOPNOTSUPP;
1da177e4 1333
564e1c86
SS		 1334 spin_lock_bh(&qdio->req_q_lock);
1335 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1336 goto out;
09a46c6e 1337
564e1c86
SS		 1338 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1339 qdio->adapter->pool.erp_req);
09a46c6e 1340
025270f0 1341 if (IS_ERR(req)) {
c41f8cbd
SS		 1342 retval = PTR_ERR(req);
1343 goto out;
aef4a983
MS		 1344 }
1345
09a46c6e 1346 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1347 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1348 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1349 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1350
c41f8cbd
SS		 1351 req->handler = zfcp_fsf_exchange_port_data_handler;
1352 req->erp_action = erp_action;
1353 erp_action->fsf_req = req;
52ef11a7 1354
287ac01a 1355 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1356 retval = zfcp_fsf_req_send(req);
1da177e4 1357 if (retval) {
c41f8cbd 1358 zfcp_fsf_req_free(req);
52ef11a7
SS		 1359 erp_action->fsf_req = NULL;
1360 }
c41f8cbd 1361out:
564e1c86 1362 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1363 return retval;
1364}
1365
52ef11a7
SS		 1366/**
1367 * zfcp_fsf_exchange_port_data_sync - request information about local port
564e1c86 1368 * @qdio: pointer to struct zfcp_qdio
c41f8cbd
SS		 1369 * @data: pointer to struct fsf_qtcb_bottom_port
1370 * Returns: 0 on success, error otherwise
52ef11a7 1371 */
564e1c86 1372int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1373 struct fsf_qtcb_bottom_port *data)
52ef11a7 1374{
44cc76f2 1375 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1376 struct zfcp_fsf_req *req = NULL;
1377 int retval = -EIO;
52ef11a7 1378
564e1c86 1379 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1380 return -EOPNOTSUPP;
52ef11a7 1381
564e1c86
SS		 1382 spin_lock_bh(&qdio->req_q_lock);
1383 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1384 goto out_unlock;
c41f8cbd 1385
564e1c86 1386 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
09a46c6e 1387
025270f0 1388 if (IS_ERR(req)) {
c41f8cbd 1389 retval = PTR_ERR(req);
ada81b74 1390 goto out_unlock;
1da177e4
LT		 1391 }
1392
52ef11a7 1393 if (data)
c41f8cbd 1394 req->data = data;
52ef11a7 1395
564e1c86 1396 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1397 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1398 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1399
c41f8cbd
SS		 1400 req->handler = zfcp_fsf_exchange_port_data_handler;
1401 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1402 retval = zfcp_fsf_req_send(req);
564e1c86 1403 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1404
553448f6 1405 if (!retval)
058b8647
SS		 1406 wait_for_completion(&req->completion);
1407
c41f8cbd 1408 zfcp_fsf_req_free(req);
1da177e4 1409
1da177e4 1410 return retval;
ada81b74
CS		 1411
1412out_unlock:
564e1c86 1413 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1414 return retval;
1da177e4
LT		 1415}
1416
c41f8cbd 1417static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1418{
c41f8cbd
SS		 1419 struct zfcp_port *port = req->data;
1420 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1421 struct fsf_plogi *plogi;
1da177e4 1422
c41f8cbd 1423 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a17c5855 1424 goto out;
1da177e4 1425
1da177e4 1426 switch (header->fsf_status) {
1da177e4 1427 case FSF_PORT_ALREADY_OPEN:
1da177e4 1428 break;
1da177e4 1429 case FSF_ACCESS_DENIED:
c41f8cbd 1430 zfcp_fsf_access_denied_port(req, port);
1da177e4 1431 break;
1da177e4 1432 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1433 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1434 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1435 "remote port 0x%016Lx\n",
1436 (unsigned long long)port->wwpn);
5ffd51a5 1437 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1438 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1439 break;
1da177e4 1440 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1441 switch (header->fsf_status_qual.word[0]) {
1442 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1443 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1444 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1445 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1446 break;
1447 }
1448 break;
1da177e4 1449 case FSF_GOOD:
1da177e4 1450 port->handle = header->port_handle;
1da177e4
LT		 1451 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1452 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1453 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1454 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1455 &port->status);
1da177e4
LT		 1456 /* check whether D_ID has changed during open */
1457 /*
1458 * FIXME: This check is not airtight, as the FCP channel does
1459 * not monitor closures of target port connections caused on
1460 * the remote side. Thus, they might miss out on invalidating
1461 * locally cached WWPNs (and other N_Port parameters) of gone
1462 * target ports. So, our heroic attempt to make things safe
1463 * could be undermined by 'open port' response data tagged with
1464 * obsolete WWPNs. Another reason to monitor potential
1465 * connection closures ourself at least (by interpreting
1466 * incoming ELS' and unsolicited status). It just crosses my
1467 * mind that one should be able to cross-check by means of
1468 * another GID_PN straight after a port has been opened.
1469 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1470 */
c41f8cbd 1471 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1472 if (req->qtcb->bottom.support.els1_length >=
1473 FSF_PLOGI_MIN_LEN) {
10d00f78 1474 if (plogi->serv_param.wwpn != port->wwpn) {
b98478d7 1475 port->d_id = 0;
10d00f78
CS		 1476 dev_warn(&port->adapter->ccw_device->dev,
1477 "A port opened with WWPN 0x%016Lx "
1478 "returned data that identifies it as "
1479 "WWPN 0x%016Lx\n",
1480 (unsigned long long) port->wwpn,
1481 (unsigned long long)
1482 plogi->serv_param.wwpn);
1483 } else {
c41f8cbd
SS		 1484 port->wwnn = plogi->serv_param.wwnn;
1485 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1486 }
1487 }
1488 break;
1da177e4 1489 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1490 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1491 break;
1492 }
a17c5855
MP		 1493
1494out:
f3450c7b 1495 put_device(&port->sysfs_device);
1da177e4
LT		 1496}
1497
c41f8cbd
SS		 1498/**
1499 * zfcp_fsf_open_port - create and send open port request
1500 * @erp_action: pointer to struct zfcp_erp_action
1501 * Returns: 0 on success, error otherwise
1da177e4 1502 */
c41f8cbd 1503int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1504{
44cc76f2 1505 struct qdio_buffer_element *sbale;
564e1c86 1506 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
a17c5855 1507 struct zfcp_port *port = erp_action->port;
564e1c86 1508 struct zfcp_fsf_req *req;
c41f8cbd
SS		 1509 int retval = -EIO;
1510
564e1c86
SS		 1511 spin_lock_bh(&qdio->req_q_lock);
1512 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1513 goto out;
1514
564e1c86
SS		 1515 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1516 qdio->adapter->pool.erp_req);
09a46c6e 1517
025270f0 1518 if (IS_ERR(req)) {
c41f8cbd 1519 retval = PTR_ERR(req);
1da177e4 1520 goto out;
c41f8cbd 1521 }
1da177e4 1522
09a46c6e 1523 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1524 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1525 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1526 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1527
c41f8cbd 1528 req->handler = zfcp_fsf_open_port_handler;
a17c5855
MP		 1529 req->qtcb->bottom.support.d_id = port->d_id;
1530 req->data = port;
c41f8cbd
SS		 1531 req->erp_action = erp_action;
1532 erp_action->fsf_req = req;
f3450c7b 1533 get_device(&port->sysfs_device);
c41f8cbd 1534
287ac01a 1535 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1536 retval = zfcp_fsf_req_send(req);
1da177e4 1537 if (retval) {
c41f8cbd 1538 zfcp_fsf_req_free(req);
1da177e4 1539 erp_action->fsf_req = NULL;
f3450c7b 1540 put_device(&port->sysfs_device);
1da177e4 1541 }
c41f8cbd 1542out:
564e1c86 1543 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1544 return retval;
1545}
1546
c41f8cbd 1547static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1548{
c41f8cbd 1549 struct zfcp_port *port = req->data;
1da177e4 1550
c41f8cbd 1551 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1552 return;
1da177e4 1553
c41f8cbd 1554 switch (req->qtcb->header.fsf_status) {
1da177e4 1555 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1556 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1557 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1558 break;
1da177e4 1559 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1560 break;
1da177e4 1561 case FSF_GOOD:
5ffd51a5 1562 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1563 ZFCP_STATUS_COMMON_OPEN,
1564 ZFCP_CLEAR);
1da177e4 1565 break;
1da177e4 1566 }
1da177e4
LT		 1567}
1568
c41f8cbd
SS		 1569/**
1570 * zfcp_fsf_close_port - create and send close port request
1571 * @erp_action: pointer to struct zfcp_erp_action
1572 * Returns: 0 on success, error otherwise
1da177e4 1573 */
c41f8cbd 1574int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1575{
44cc76f2 1576 struct qdio_buffer_element *sbale;
564e1c86 1577 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1578 struct zfcp_fsf_req *req;
1579 int retval = -EIO;
1580
564e1c86
SS		 1581 spin_lock_bh(&qdio->req_q_lock);
1582 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1583 goto out;
1584
564e1c86
SS		 1585 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1586 qdio->adapter->pool.erp_req);
09a46c6e 1587
025270f0 1588 if (IS_ERR(req)) {
c41f8cbd 1589 retval = PTR_ERR(req);
1da177e4 1590 goto out;
c41f8cbd 1591 }
1da177e4 1592
09a46c6e 1593 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1594 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1595 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1596 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1597
c41f8cbd
SS		 1598 req->handler = zfcp_fsf_close_port_handler;
1599 req->data = erp_action->port;
1600 req->erp_action = erp_action;
1601 req->qtcb->header.port_handle = erp_action->port->handle;
1602 erp_action->fsf_req = req;
c41f8cbd 1603
287ac01a 1604 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1605 retval = zfcp_fsf_req_send(req);
1da177e4 1606 if (retval) {
c41f8cbd 1607 zfcp_fsf_req_free(req);
1da177e4 1608 erp_action->fsf_req = NULL;
1da177e4 1609 }
c41f8cbd 1610out:
564e1c86 1611 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1612 return retval;
1613}
1614
5ab944f9
SS		 1615static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1616{
1617 struct zfcp_wka_port *wka_port = req->data;
1618 struct fsf_qtcb_header *header = &req->qtcb->header;
1619
1620 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1621 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1622 goto out;
1623 }
1624
1625 switch (header->fsf_status) {
1626 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1627 dev_warn(&req->adapter->ccw_device->dev,
1628 "Opening WKA port 0x%x failed\n", wka_port->d_id);
dceab655 1629 /* fall through */
5ab944f9
SS		 1630 case FSF_ADAPTER_STATUS_AVAILABLE:
1631 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
dceab655 1632 /* fall through */
5ab944f9
SS		 1633 case FSF_ACCESS_DENIED:
1634 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1635 break;
5ab944f9
SS		 1636 case FSF_GOOD:
1637 wka_port->handle = header->port_handle;
27f492cc
SS		 1638 /* fall through */
1639 case FSF_PORT_ALREADY_OPEN:
5ab944f9
SS		 1640 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1641 }
1642out:
1643 wake_up(&wka_port->completion_wq);
1644}
1645
1646/**
1647 * zfcp_fsf_open_wka_port - create and send open wka-port request
1648 * @wka_port: pointer to struct zfcp_wka_port
1649 * Returns: 0 on success, error otherwise
1650 */
1651int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1652{
1653 struct qdio_buffer_element *sbale;
564e1c86 1654 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1655 struct zfcp_fsf_req *req;
1656 int retval = -EIO;
1657
564e1c86
SS		 1658 spin_lock_bh(&qdio->req_q_lock);
1659 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1660 goto out;
1661
564e1c86
SS		 1662 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1663 qdio->adapter->pool.erp_req);
09a46c6e 1664
5ab944f9
SS		 1665 if (unlikely(IS_ERR(req))) {
1666 retval = PTR_ERR(req);
1667 goto out;
1668 }
1669
09a46c6e 1670 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1671 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1672 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1673 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1674
1675 req->handler = zfcp_fsf_open_wka_port_handler;
1676 req->qtcb->bottom.support.d_id = wka_port->d_id;
1677 req->data = wka_port;
1678
1679 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1680 retval = zfcp_fsf_req_send(req);
1681 if (retval)
1682 zfcp_fsf_req_free(req);
1683out:
564e1c86 1684 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1685 return retval;
1686}
1687
1688static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1689{
1690 struct zfcp_wka_port *wka_port = req->data;
1691
1692 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1693 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1694 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1695 }
1696
1697 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1698 wake_up(&wka_port->completion_wq);
1699}
1700
1701/**
1702 * zfcp_fsf_close_wka_port - create and send close wka port request
1703 * @erp_action: pointer to struct zfcp_erp_action
1704 * Returns: 0 on success, error otherwise
1705 */
1706int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1707{
1708 struct qdio_buffer_element *sbale;
564e1c86 1709 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1710 struct zfcp_fsf_req *req;
1711 int retval = -EIO;
1712
564e1c86
SS		 1713 spin_lock_bh(&qdio->req_q_lock);
1714 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1715 goto out;
1716
564e1c86
SS		 1717 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1718 qdio->adapter->pool.erp_req);
09a46c6e 1719
5ab944f9
SS		 1720 if (unlikely(IS_ERR(req))) {
1721 retval = PTR_ERR(req);
1722 goto out;
1723 }
1724
09a46c6e 1725 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1726 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1727 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1728 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1729
1730 req->handler = zfcp_fsf_close_wka_port_handler;
1731 req->data = wka_port;
1732 req->qtcb->header.port_handle = wka_port->handle;
1733
1734 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1735 retval = zfcp_fsf_req_send(req);
1736 if (retval)
1737 zfcp_fsf_req_free(req);
1738out:
564e1c86 1739 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1740 return retval;
1741}
1742
c41f8cbd 1743static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1744{
c41f8cbd
SS		 1745 struct zfcp_port *port = req->data;
1746 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1747 struct zfcp_unit *unit;
1da177e4 1748
c41f8cbd 1749 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1750 return;
1da177e4 1751
1da177e4 1752 switch (header->fsf_status) {
1da177e4 1753 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1754 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1755 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1756 break;
1da177e4 1757 case FSF_ACCESS_DENIED:
c41f8cbd 1758 zfcp_fsf_access_denied_port(req, port);
1da177e4 1759 break;
1da177e4 1760 case FSF_PORT_BOXED:
5c815d15
CS		 1761 /* can't use generic zfcp_erp_modify_port_status because
1762 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1763 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
ecf0c772
SS		 1764 read_lock(&port->unit_list_lock);
1765 list_for_each_entry(unit, &port->unit_list, list)
5c815d15
CS		 1766 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1767 &unit->status);
ecf0c772 1768 read_unlock(&port->unit_list_lock);
dfb3cf00
SS		 1769 zfcp_erp_port_boxed(port, "fscpph2", req);
1770 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1771 ZFCP_STATUS_FSFREQ_RETRY;
1772
1da177e4 1773 break;
1da177e4 1774 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1775 switch (header->fsf_status_qual.word[0]) {
1776 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1777 /* fall through */
1da177e4 1778 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1779 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1780 break;
1da177e4
LT		 1781 }
1782 break;
1da177e4 1783 case FSF_GOOD:
1da177e4
LT		 1784 /* can't use generic zfcp_erp_modify_port_status because
1785 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1786 */
1787 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
ecf0c772
SS		 1788 read_lock(&port->unit_list_lock);
1789 list_for_each_entry(unit, &port->unit_list, list)
c41f8cbd
SS		 1790 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1791 &unit->status);
ecf0c772 1792 read_unlock(&port->unit_list_lock);
1da177e4 1793 break;
1da177e4 1794 }
1da177e4
LT		 1795}
1796
c41f8cbd
SS		 1797/**
1798 * zfcp_fsf_close_physical_port - close physical port
1799 * @erp_action: pointer to struct zfcp_erp_action
1800 * Returns: 0 on success
1da177e4 1801 */
c41f8cbd 1802int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1803{
44cc76f2 1804 struct qdio_buffer_element *sbale;
564e1c86 1805 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1806 struct zfcp_fsf_req *req;
1807 int retval = -EIO;
1808
564e1c86
SS		 1809 spin_lock_bh(&qdio->req_q_lock);
1810 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1811 goto out;
1da177e4 1812
564e1c86
SS		 1813 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1814 qdio->adapter->pool.erp_req);
09a46c6e 1815
025270f0 1816 if (IS_ERR(req)) {
c41f8cbd
SS		 1817 retval = PTR_ERR(req);
1818 goto out;
1819 }
1da177e4 1820
09a46c6e 1821 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1822 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 1823 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1824 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1825
c41f8cbd
SS		 1826 req->data = erp_action->port;
1827 req->qtcb->header.port_handle = erp_action->port->handle;
1828 req->erp_action = erp_action;
1829 req->handler = zfcp_fsf_close_physical_port_handler;
1830 erp_action->fsf_req = req;
c41f8cbd 1831
287ac01a 1832 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1833 retval = zfcp_fsf_req_send(req);
1da177e4 1834 if (retval) {
c41f8cbd 1835 zfcp_fsf_req_free(req);
1da177e4 1836 erp_action->fsf_req = NULL;
1da177e4 1837 }
c41f8cbd 1838out:
564e1c86 1839 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1840 return retval;
1841}
1842
c41f8cbd 1843static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1844{
c41f8cbd
SS		 1845 struct zfcp_adapter *adapter = req->adapter;
1846 struct zfcp_unit *unit = req->data;
1847 struct fsf_qtcb_header *header = &req->qtcb->header;
1848 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1849 struct fsf_queue_designator *queue_designator =
1850 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1851 int exclusive, readwrite;
1da177e4 1852
c41f8cbd 1853 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1854 return;
1da177e4 1855
1da177e4 1856 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1857 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1858 ZFCP_STATUS_UNIT_SHARED |
1859 ZFCP_STATUS_UNIT_READONLY,
1860 &unit->status);
1861
1da177e4
LT		 1862 switch (header->fsf_status) {
1863
1864 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1865 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1866 /* fall through */
1da177e4 1867 case FSF_LUN_ALREADY_OPEN:
1da177e4 1868 break;
1da177e4 1869 case FSF_ACCESS_DENIED:
c41f8cbd 1870 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1871 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1872 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1873 break;
1da177e4 1874 case FSF_PORT_BOXED:
5ffd51a5 1875 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1876 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1877 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1878 break;
1da177e4 1879 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1880 if (header->fsf_status_qual.word[0])
553448f6 1881 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1882 "LUN 0x%Lx on port 0x%Lx is already in "
1883 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1884 (unsigned long long)unit->fcp_lun,
1885 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1886 queue_designator->cssid,
1887 queue_designator->hla);
c41f8cbd 1888 else
553448f6
CS		 1889 zfcp_act_eval_err(adapter,
1890 header->fsf_status_qual.word[2]);
5ffd51a5 1891 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1892 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1893 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1894 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1895 break;
1da177e4 1896 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1897 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1898 "No handle is available for LUN "
1899 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1900 (unsigned long long)unit->fcp_lun,
1901 (unsigned long long)unit->port->wwpn);
5ffd51a5 1902 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1903 /* fall through */
1904 case FSF_INVALID_COMMAND_OPTION:
1905 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1906 break;
1da177e4 1907 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1908 switch (header->fsf_status_qual.word[0]) {
1909 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 1910 zfcp_fc_test_link(unit->port);
c41f8cbd 1911 /* fall through */
1da177e4 1912 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1913 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1914 break;
1da177e4
LT		 1915 }
1916 break;
1917
1da177e4 1918 case FSF_GOOD:
1da177e4 1919 unit->handle = header->lun_handle;
1da177e4 1920 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1921
1922 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1923 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
6fcf41d1 1924 !zfcp_ccw_priv_sch(adapter)) {
aef4a983
MS		 1925 exclusive = (bottom->lun_access_info &
1926 FSF_UNIT_ACCESS_EXCLUSIVE);
1927 readwrite = (bottom->lun_access_info &
1928 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1929
1da177e4
LT		 1930 if (!exclusive)
1931 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1932 &unit->status);
1933
1934 if (!readwrite) {
1935 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1936 &unit->status);
c41f8cbd 1937 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1938 "SCSI device at LUN 0x%016Lx on port "
1939 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1940 (unsigned long long)unit->fcp_lun,
1941 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1942 }
1943
1944 if (exclusive && !readwrite) {
c41f8cbd 1945 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1946 "Exclusive read-only access not "
1947 "supported (unit 0x%016Lx, "
1948 "port 0x%016Lx)\n",
7ba58c9c
SS		 1949 (unsigned long long)unit->fcp_lun,
1950 (unsigned long long)unit->port->wwpn);
5ffd51a5 1951 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1952 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1953 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1954 } else if (!exclusive && readwrite) {
c41f8cbd 1955 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1956 "Shared read-write access not "
1957 "supported (unit 0x%016Lx, port "
27c3f0a6 1958 "0x%016Lx)\n",
7ba58c9c
SS		 1959 (unsigned long long)unit->fcp_lun,
1960 (unsigned long long)unit->port->wwpn);
5ffd51a5 1961 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1962 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1963 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1964 }
1965 }
1da177e4 1966 break;
1da177e4 1967 }
1da177e4
LT		 1968}
1969
c41f8cbd
SS		 1970/**
1971 * zfcp_fsf_open_unit - open unit
1972 * @erp_action: pointer to struct zfcp_erp_action
1973 * Returns: 0 on success, error otherwise
1da177e4 1974 */
c41f8cbd 1975int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1976{
44cc76f2 1977 struct qdio_buffer_element *sbale;
c41f8cbd 1978 struct zfcp_adapter *adapter = erp_action->adapter;
564e1c86 1979 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 1980 struct zfcp_fsf_req *req;
1981 int retval = -EIO;
1982
564e1c86
SS		 1983 spin_lock_bh(&qdio->req_q_lock);
1984 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1985 goto out;
1da177e4 1986
564e1c86 1987 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
a4623c46 1988 adapter->pool.erp_req);
09a46c6e 1989
025270f0 1990 if (IS_ERR(req)) {
c41f8cbd
SS		 1991 retval = PTR_ERR(req);
1992 goto out;
1993 }
1994
09a46c6e 1995 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1996 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1997 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1998 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1999
c41f8cbd
SS		 2000 req->qtcb->header.port_handle = erp_action->port->handle;
2001 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
2002 req->handler = zfcp_fsf_open_unit_handler;
2003 req->data = erp_action->unit;
2004 req->erp_action = erp_action;
2005 erp_action->fsf_req = req;
2006
2007 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2008 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2009
287ac01a 2010 zfcp_fsf_start_erp_timer(req);
c41f8cbd 2011 retval = zfcp_fsf_req_send(req);
1da177e4 2012 if (retval) {
c41f8cbd 2013 zfcp_fsf_req_free(req);
1da177e4 2014 erp_action->fsf_req = NULL;
1da177e4 2015 }
c41f8cbd 2016out:
564e1c86 2017 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 2018 return retval;
2019}
2020
c41f8cbd 2021static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 2022{
c41f8cbd 2023 struct zfcp_unit *unit = req->data;
1da177e4 2024
c41f8cbd 2025 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 2026 return;
1da177e4 2027
c41f8cbd 2028 switch (req->qtcb->header.fsf_status) {
1da177e4 2029 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2030 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 2031 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2032 break;
1da177e4 2033 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2034 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 2035 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2036 break;
1da177e4 2037 case FSF_PORT_BOXED:
5ffd51a5 2038 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 2039 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2040 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 2041 break;
1da177e4 2042 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 2043 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 2044 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 2045 zfcp_fc_test_link(unit->port);
c41f8cbd 2046 /* fall through */
1da177e4 2047 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 2048 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2049 break;
2050 }
2051 break;
1da177e4 2052 case FSF_GOOD:
1da177e4 2053 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2054 break;
1da177e4 2055 }
1da177e4
LT		 2056}
2057
2058/**
c41f8cbd
SS		 2059 * zfcp_fsf_close_unit - close zfcp unit
2060 * @erp_action: pointer to struct zfcp_unit
2061 * Returns: 0 on success, error otherwise
1da177e4 2062 */
c41f8cbd 2063int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2064{
44cc76f2 2065 struct qdio_buffer_element *sbale;
564e1c86 2066 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 2067 struct zfcp_fsf_req *req;
2068 int retval = -EIO;
1da177e4 2069
564e1c86
SS		 2070 spin_lock_bh(&qdio->req_q_lock);
2071 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 2072 goto out;
09a46c6e 2073
564e1c86
SS		 2074 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2075 qdio->adapter->pool.erp_req);
09a46c6e 2076
025270f0 2077 if (IS_ERR(req)) {
c41f8cbd
SS		 2078 retval = PTR_ERR(req);
2079 goto out;
2080 }
1da177e4 2081
09a46c6e 2082 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 2083 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2084 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2085 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2086
c41f8cbd
SS		 2087 req->qtcb->header.port_handle = erp_action->port->handle;
2088 req->qtcb->header.lun_handle = erp_action->unit->handle;
2089 req->handler = zfcp_fsf_close_unit_handler;
2090 req->data = erp_action->unit;
2091 req->erp_action = erp_action;
2092 erp_action->fsf_req = req;
fdf23452 2093
287ac01a 2094 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2095 retval = zfcp_fsf_req_send(req);
2096 if (retval) {
2097 zfcp_fsf_req_free(req);
2098 erp_action->fsf_req = NULL;
2099 }
2100out:
564e1c86 2101 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 2102 return retval;
1da177e4
LT		 2103}
2104
c9615858
CS		 2105static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2106{
2107 lat_rec->sum += lat;
c41f8cbd
SS		 2108 lat_rec->min = min(lat_rec->min, lat);
2109 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2110}
2111
d9742b42 2112static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
c9615858 2113{
d9742b42
CS		 2114 struct fsf_qual_latency_info *lat_in;
2115 struct latency_cont *lat = NULL;
c41f8cbd 2116 struct zfcp_unit *unit = req->unit;
d9742b42
CS		 2117 struct zfcp_blk_drv_data blktrc;
2118 int ticks = req->adapter->timer_ticks;
c9615858 2119
d9742b42 2120 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2121
d9742b42
CS		 2122 blktrc.flags = 0;
2123 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2124 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
2125 blktrc.flags |= ZFCP_BLK_REQ_ERROR;
2126 blktrc.inb_usage = req->queue_req.qdio_inb_usage;
2127 blktrc.outb_usage = req->queue_req.qdio_outb_usage;
2128
2129 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2130 blktrc.flags |= ZFCP_BLK_LAT_VALID;
2131 blktrc.channel_lat = lat_in->channel_lat * ticks;
2132 blktrc.fabric_lat = lat_in->fabric_lat * ticks;
2133
2134 switch (req->qtcb->bottom.io.data_direction) {
2135 case FSF_DATADIR_READ:
2136 lat = &unit->latencies.read;
2137 break;
2138 case FSF_DATADIR_WRITE:
2139 lat = &unit->latencies.write;
2140 break;
2141 case FSF_DATADIR_CMND:
2142 lat = &unit->latencies.cmd;
2143 break;
2144 }
1da177e4 2145
d9742b42
CS		 2146 if (lat) {
2147 spin_lock(&unit->latencies.lock);
2148 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat);
2149 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat);
2150 lat->counter++;
2151 spin_unlock(&unit->latencies.lock);
2152 }
0997f1c5 2153 }
0997f1c5 2154
d9742b42
CS		 2155 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
2156 sizeof(blktrc));
0997f1c5 2157}
0997f1c5 2158
c41f8cbd 2159static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2160{
0ac55aa9 2161 struct scsi_cmnd *scpnt;
1da177e4 2162 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2163 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2164 u32 sns_len;
f76af7d7 2165 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2166 unsigned long flags;
1da177e4 2167
c41f8cbd
SS		 2168 read_lock_irqsave(&req->adapter->abort_lock, flags);
2169
0ac55aa9
SS		 2170 scpnt = req->data;
2171 if (unlikely(!scpnt)) {
2172 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2173 return;
2174 }
2175
c41f8cbd 2176 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2177 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2178 goto skip_fsfstatus;
2179 }
2180
c41f8cbd 2181 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2182 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2183 goto skip_fsfstatus;
2184 }
2185
feac6a07 2186 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2187
1da177e4 2188 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2189
d9742b42 2190 zfcp_fsf_req_trace(req, scpnt);
0997f1c5 2191
1da177e4 2192 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2193 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2194 set_host_byte(scpnt, DID_OK);
c41f8cbd 2195 else {
feac6a07 2196 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2197 goto skip_fsfstatus;
1da177e4
LT		 2198 }
2199 }
2200
1da177e4 2201 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2202 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2203 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2204 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2205 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2206
9d058ecf 2207 memcpy(scpnt->sense_buffer,
1da177e4 2208 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2209 }
2210
1da177e4 2211 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2212 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2213 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2214 scpnt->underflow)
feac6a07 2215 set_host_byte(scpnt, DID_ERROR);
1da177e4 2216 }
c41f8cbd 2217skip_fsfstatus:
8a36e453 2218 if (scpnt->result != 0)
5771710b 2219 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
8a36e453 2220 else if (scpnt->retries > 0)
5771710b 2221 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
8a36e453 2222 else
5771710b 2223 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
1da177e4 2224
1da177e4 2225 scpnt->host_scribble = NULL;
1da177e4 2226 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2227 /*
2228 * We must hold this lock until scsi_done has been called.
2229 * Otherwise we may call scsi_done after abort regarding this
2230 * command has completed.
2231 * Note: scsi_done must not block!
2232 */
c41f8cbd 2233 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2234}
2235
c41f8cbd 2236static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2237{
1da177e4 2238 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2239 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2240 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2241
c41f8cbd
SS		 2242 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2243 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2244 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2245}
2246
2247
2248static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2249{
2250 struct zfcp_unit *unit;
2251 struct fsf_qtcb_header *header = &req->qtcb->header;
2252
2253 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2254 unit = req->data;
2255 else
2256 unit = req->unit;
2257
2258 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2259 goto skip_fsfstatus;
1da177e4 2260
c41f8cbd
SS		 2261 switch (header->fsf_status) {
2262 case FSF_HANDLE_MISMATCH:
2263 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2264 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2265 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2266 break;
2267 case FSF_FCPLUN_NOT_VALID:
2268 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2269 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2270 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2271 break;
c41f8cbd
SS		 2272 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2273 zfcp_fsf_class_not_supp(req);
1da177e4 2274 break;
c41f8cbd
SS		 2275 case FSF_ACCESS_DENIED:
2276 zfcp_fsf_access_denied_unit(req, unit);
2277 break;
2278 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2279 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2280 "Incorrect direction %d, unit 0x%016Lx on port "
2281 "0x%016Lx closed\n",
c41f8cbd 2282 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2283 (unsigned long long)unit->fcp_lun,
2284 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2285 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2286 req);
c41f8cbd
SS		 2287 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2288 break;
2289 case FSF_CMND_LENGTH_NOT_VALID:
2290 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2291 "Incorrect CDB length %d, unit 0x%016Lx on "
2292 "port 0x%016Lx closed\n",
c41f8cbd 2293 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2294 (unsigned long long)unit->fcp_lun,
2295 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2296 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2297 req);
c41f8cbd
SS		 2298 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2299 break;
2300 case FSF_PORT_BOXED:
5ffd51a5 2301 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2302 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2303 ZFCP_STATUS_FSFREQ_RETRY;
2304 break;
2305 case FSF_LUN_BOXED:
5ffd51a5 2306 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2307 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2308 ZFCP_STATUS_FSFREQ_RETRY;
2309 break;
2310 case FSF_ADAPTER_STATUS_AVAILABLE:
2311 if (header->fsf_status_qual.word[0] ==
2312 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
6f53a2d2 2313 zfcp_fc_test_link(unit->port);
c41f8cbd 2314 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2315 break;
1da177e4 2316 }
c41f8cbd
SS		 2317skip_fsfstatus:
2318 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2319 zfcp_fsf_send_fcp_ctm_handler(req);
2320 else {
2321 zfcp_fsf_send_fcp_command_task_handler(req);
2322 req->unit = NULL;
f3450c7b 2323 put_device(&unit->sysfs_device);
c41f8cbd 2324 }
1da177e4
LT		 2325}
2326
7ba58c9c
SS		 2327static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2328{
2329 u32 *fcp_dl_ptr;
2330
2331 /*
2332 * fcp_dl_addr = start address of fcp_cmnd structure +
2333 * size of fixed part + size of dynamically sized add_dcp_cdb field
2334 * SEE FCP-2 documentation
2335 */
2336 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2337 (fcp_cmd->add_fcp_cdb_length << 2));
2338 *fcp_dl_ptr = fcp_dl;
2339}
2340
c41f8cbd
SS		 2341/**
2342 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2343 * @unit: unit where command is sent to
2344 * @scsi_cmnd: scsi command to be sent
1da177e4 2345 */
63caf367
CS		 2346int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2347 struct scsi_cmnd *scsi_cmnd)
1da177e4 2348{
c41f8cbd
SS		 2349 struct zfcp_fsf_req *req;
2350 struct fcp_cmnd_iu *fcp_cmnd_iu;
bc90c863 2351 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
c41f8cbd 2352 int real_bytes, retval = -EIO;
63caf367 2353 struct zfcp_adapter *adapter = unit->port->adapter;
564e1c86 2354 struct zfcp_qdio *qdio = adapter->qdio;
1da177e4 2355
c41f8cbd
SS		 2356 if (unlikely(!(atomic_read(&unit->status) &
2357 ZFCP_STATUS_COMMON_UNBLOCKED)))
2358 return -EBUSY;
1da177e4 2359
564e1c86
SS		 2360 spin_lock(&qdio->req_q_lock);
2361 if (atomic_read(&qdio->req_q.count) <= 0) {
2362 atomic_inc(&qdio->req_q_full);
c41f8cbd 2363 goto out;
8fdf30d5 2364 }
09a46c6e 2365
564e1c86 2366 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
a4623c46 2367 adapter->pool.scsi_req);
09a46c6e 2368
025270f0 2369 if (IS_ERR(req)) {
c41f8cbd
SS		 2370 retval = PTR_ERR(req);
2371 goto out;
2372 }
2373
09a46c6e 2374 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
f3450c7b 2375 get_device(&unit->sysfs_device);
c41f8cbd
SS		 2376 req->unit = unit;
2377 req->data = scsi_cmnd;
2378 req->handler = zfcp_fsf_send_fcp_command_handler;
2379 req->qtcb->header.lun_handle = unit->handle;
2380 req->qtcb->header.port_handle = unit->port->handle;
2381 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2382
2383 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2384
2385 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2386 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2387 /*
2388 * set depending on data direction:
2389 * data direction bits in SBALE (SB Type)
2390 * data direction bits in QTCB
2391 * data direction bits in FCP_CMND IU
2392 */
2393 switch (scsi_cmnd->sc_data_direction) {
2394 case DMA_NONE:
2395 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
1da177e4 2396 break;
c41f8cbd
SS		 2397 case DMA_FROM_DEVICE:
2398 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
c41f8cbd
SS		 2399 fcp_cmnd_iu->rddata = 1;
2400 break;
2401 case DMA_TO_DEVICE:
2402 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2403 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2404 fcp_cmnd_iu->wddata = 1;
1da177e4 2405 break;
c41f8cbd 2406 case DMA_BIDIRECTIONAL:
c41f8cbd 2407 goto failed_scsi_cmnd;
1da177e4
LT		 2408 }
2409
c41f8cbd
SS		 2410 if (likely((scsi_cmnd->device->simple_tags) ||
2411 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2412 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2413 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2414 else
2415 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2416
c41f8cbd
SS		 2417 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2418 fcp_cmnd_iu->add_fcp_cdb_length =
2419 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2420
c41f8cbd 2421 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2422
c41f8cbd 2423 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2424 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2425
564e1c86 2426 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
c41f8cbd
SS		 2427 scsi_sglist(scsi_cmnd),
2428 FSF_MAX_SBALS_PER_REQ);
2429 if (unlikely(real_bytes < 0)) {
42428f74 2430 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
c41f8cbd 2431 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2432 "Oversize data package, unit 0x%016Lx "
2433 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2434 (unsigned long long)unit->fcp_lun,
2435 (unsigned long long)unit->port->wwpn);
5ffd51a5 2436 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2437 retval = -EINVAL;
2438 }
2439 goto failed_scsi_cmnd;
1da177e4 2440 }
1da177e4 2441
c41f8cbd 2442 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2443
c41f8cbd
SS		 2444 retval = zfcp_fsf_req_send(req);
2445 if (unlikely(retval))
2446 goto failed_scsi_cmnd;
1da177e4 2447
c41f8cbd 2448 goto out;
1da177e4 2449
c41f8cbd 2450failed_scsi_cmnd:
f3450c7b 2451 put_device(&unit->sysfs_device);
c41f8cbd
SS		 2452 zfcp_fsf_req_free(req);
2453 scsi_cmnd->host_scribble = NULL;
2454out:
564e1c86 2455 spin_unlock(&qdio->req_q_lock);
c41f8cbd 2456 return retval;
1da177e4
LT		 2457}
2458
2459/**
c41f8cbd 2460 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2461 * @unit: pointer to struct zfcp_unit
2462 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2463 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2464 */
63caf367 2465struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2466{
44cc76f2 2467 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2468 struct zfcp_fsf_req *req = NULL;
2469 struct fcp_cmnd_iu *fcp_cmnd_iu;
564e1c86 2470 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
1da177e4 2471
c41f8cbd
SS		 2472 if (unlikely(!(atomic_read(&unit->status) &
2473 ZFCP_STATUS_COMMON_UNBLOCKED)))
2474 return NULL;
1da177e4 2475
564e1c86
SS		 2476 spin_lock_bh(&qdio->req_q_lock);
2477 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2478 goto out;
09a46c6e 2479
564e1c86
SS		 2480 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2481 qdio->adapter->pool.scsi_req);
09a46c6e 2482
633528c3
SS		 2483 if (IS_ERR(req)) {
2484 req = NULL;
c41f8cbd 2485 goto out;
633528c3 2486 }
1da177e4 2487
c41f8cbd
SS		 2488 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2489 req->data = unit;
2490 req->handler = zfcp_fsf_send_fcp_command_handler;
2491 req->qtcb->header.lun_handle = unit->handle;
2492 req->qtcb->header.port_handle = unit->port->handle;
2493 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2494 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2495 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2496 sizeof(u32);
c41f8cbd 2497
564e1c86 2498 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 2499 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2500 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2501
c41f8cbd
SS		 2502 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2503 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2504 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2505
c41f8cbd
SS		 2506 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2507 if (!zfcp_fsf_req_send(req))
2508 goto out;
1da177e4 2509
c41f8cbd
SS		 2510 zfcp_fsf_req_free(req);
2511 req = NULL;
2512out:
564e1c86 2513 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 2514 return req;
2515}
1da177e4 2516
c41f8cbd
SS		 2517static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2518{
1da177e4
LT		 2519}
2520
c41f8cbd
SS		 2521/**
2522 * zfcp_fsf_control_file - control file upload/download
2523 * @adapter: pointer to struct zfcp_adapter
2524 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2525 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2526 */
c41f8cbd
SS		 2527struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2528 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2529{
44cc76f2 2530 struct qdio_buffer_element *sbale;
564e1c86 2531 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 2532 struct zfcp_fsf_req *req = NULL;
2533 struct fsf_qtcb_bottom_support *bottom;
2534 int direction, retval = -EIO, bytes;
2535
2536 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2537 return ERR_PTR(-EOPNOTSUPP);
2538
2539 switch (fsf_cfdc->command) {
2540 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2541 direction = SBAL_FLAGS0_TYPE_WRITE;
2542 break;
2543 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2544 direction = SBAL_FLAGS0_TYPE_READ;
2545 break;
2546 default:
2547 return ERR_PTR(-EINVAL);
2548 }
1da177e4 2549
564e1c86
SS		 2550 spin_lock_bh(&qdio->req_q_lock);
2551 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2552 goto out;
1da177e4 2553
564e1c86 2554 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
025270f0 2555 if (IS_ERR(req)) {
c41f8cbd
SS		 2556 retval = -EPERM;
2557 goto out;
2558 }
1da177e4 2559
c41f8cbd 2560 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2561
564e1c86 2562 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2563 sbale[0].flags |= direction;
8a36e453 2564
c41f8cbd
SS		 2565 bottom = &req->qtcb->bottom.support;
2566 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2567 bottom->option = fsf_cfdc->option;
8a36e453 2568
564e1c86
SS		 2569 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2570 direction, fsf_cfdc->sg,
2571 FSF_MAX_SBALS_PER_REQ);
c41f8cbd 2572 if (bytes != ZFCP_CFDC_MAX_SIZE) {
c41f8cbd
SS		 2573 zfcp_fsf_req_free(req);
2574 goto out;
2575 }
1da177e4 2576
c41f8cbd
SS		 2577 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2578 retval = zfcp_fsf_req_send(req);
2579out:
564e1c86 2580 spin_unlock_bh(&qdio->req_q_lock);
8a36e453 2581
c41f8cbd 2582 if (!retval) {
058b8647 2583 wait_for_completion(&req->completion);
c41f8cbd 2584 return req;
1da177e4 2585 }
c41f8cbd 2586 return ERR_PTR(retval);
1da177e4 2587}
bd63eaf4
SS		 2588
2589/**
2590 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2591 * @adapter: pointer to struct zfcp_adapter
2592 * @sbal_idx: response queue index of SBAL to be processed
2593 */
564e1c86 2594void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
bd63eaf4 2595{
564e1c86
SS		 2596 struct zfcp_adapter *adapter = qdio->adapter;
2597 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
bd63eaf4
SS		 2598 struct qdio_buffer_element *sbale;
2599 struct zfcp_fsf_req *fsf_req;
2600 unsigned long flags, req_id;
2601 int idx;
2602
2603 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2604
2605 sbale = &sbal->element[idx];
2606 req_id = (unsigned long) sbale->addr;
2607 spin_lock_irqsave(&adapter->req_list_lock, flags);
2608 fsf_req = zfcp_reqlist_find(adapter, req_id);
2609
2610 if (!fsf_req)
2611 /*
2612 * Unknown request means that we have potentially memory
2613 * corruption and must stop the machine immediately.
2614 */
2615 panic("error: unknown req_id (%lx) on adapter %s.\n",
2616 req_id, dev_name(&adapter->ccw_device->dev));
2617
2618 list_del(&fsf_req->list);
2619 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2620
42428f74
SS		 2621 fsf_req->queue_req.sbal_response = sbal_idx;
2622 fsf_req->queue_req.qdio_inb_usage =
564e1c86 2623 atomic_read(&qdio->resp_q.count);
bd63eaf4
SS		 2624 zfcp_fsf_req_complete(fsf_req);
2625
2626 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2627 break;
2628 }
2629}
Linux kernel - Deliverables
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