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[SCSI] zfcp: introduce _setup, _destroy for qdio and FC
[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{
c41f8cbd
SS		 125 struct fsf_status_read_buffer *sr_buf = req->data;
126 struct zfcp_adapter *adapter = req->adapter;
127 struct zfcp_port *port;
128 int d_id = sr_buf->d_id & ZFCP_DID_MASK;
129 unsigned long flags;
1da177e4 130
c41f8cbd
SS		 131 read_lock_irqsave(&zfcp_data.config_lock, flags);
132 list_for_each_entry(port, &adapter->port_list_head, list)
133 if (port->d_id == d_id) {
134 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
5ffd51a5 135 zfcp_erp_port_reopen(port, 0, "fssrpc1", req);
c41f8cbd
SS		 136 return;
137 }
138 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1da177e4
LT		 139}
140
5ffd51a5 141static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, char *id,
c41f8cbd 142 struct fsf_link_down_info *link_down)
aef4a983 143{
c41f8cbd 144 struct zfcp_adapter *adapter = req->adapter;
70932935 145 unsigned long flags;
698ec016 146
c41f8cbd 147 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
ee69ab7a
MS		 148 return;
149
150 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
70932935
CS		 151
152 read_lock_irqsave(&zfcp_data.config_lock, flags);
a2fa0aed 153 zfcp_scsi_schedule_rports_block(adapter);
70932935 154 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
ee69ab7a 155
c41f8cbd 156 if (!link_down)
2f8f3ed5 157 goto out;
ee69ab7a 158
aef4a983
MS		 159 switch (link_down->error_code) {
160 case FSF_PSQ_LINK_NO_LIGHT:
c41f8cbd 161 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 162 "There is no light signal from the local "
163 "fibre channel cable\n");
aef4a983
MS		 164 break;
165 case FSF_PSQ_LINK_WRAP_PLUG:
c41f8cbd 166 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 167 "There is a wrap plug instead of a fibre "
168 "channel cable\n");
aef4a983
MS		 169 break;
170 case FSF_PSQ_LINK_NO_FCP:
c41f8cbd 171 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 172 "The adjacent fibre channel node does not "
173 "support FCP\n");
aef4a983
MS		 174 break;
175 case FSF_PSQ_LINK_FIRMWARE_UPDATE:
c41f8cbd 176 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 177 "The FCP device is suspended because of a "
178 "firmware update\n");
553448f6 179 break;
aef4a983 180 case FSF_PSQ_LINK_INVALID_WWPN:
c41f8cbd 181 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 182 "The FCP device detected a WWPN that is "
183 "duplicate or not valid\n");
aef4a983
MS		 184 break;
185 case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
c41f8cbd 186 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 187 "The fibre channel fabric does not support NPIV\n");
aef4a983
MS		 188 break;
189 case FSF_PSQ_LINK_NO_FCP_RESOURCES:
c41f8cbd 190 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 191 "The FCP adapter cannot support more NPIV ports\n");
aef4a983
MS		 192 break;
193 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
c41f8cbd 194 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 195 "The adjacent switch cannot support "
196 "more NPIV ports\n");
aef4a983
MS		 197 break;
198 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
c41f8cbd 199 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 200 "The FCP adapter could not log in to the "
201 "fibre channel fabric\n");
aef4a983
MS		 202 break;
203 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
c41f8cbd 204 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 205 "The WWPN assignment file on the FCP adapter "
206 "has been damaged\n");
aef4a983
MS		 207 break;
208 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
c41f8cbd 209 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 210 "The mode table on the FCP adapter "
211 "has been damaged\n");
aef4a983
MS		 212 break;
213 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
c41f8cbd 214 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 215 "All NPIV ports on the FCP adapter have "
216 "been assigned\n");
aef4a983
MS		 217 break;
218 default:
c41f8cbd 219 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 220 "The link between the FCP adapter and "
221 "the FC fabric is down\n");
aef4a983 222 }
c41f8cbd
SS		 223out:
224 zfcp_erp_adapter_failed(adapter, id, req);
aef4a983
MS		 225}
226
c41f8cbd 227static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
1da177e4 228{
c41f8cbd
SS		 229 struct fsf_status_read_buffer *sr_buf = req->data;
230 struct fsf_link_down_info *ldi =
231 (struct fsf_link_down_info *) &sr_buf->payload;
1da177e4 232
c41f8cbd
SS		 233 switch (sr_buf->status_subtype) {
234 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
5ffd51a5 235 zfcp_fsf_link_down_info_eval(req, "fssrld1", ldi);
1da177e4 236 break;
c41f8cbd 237 case FSF_STATUS_READ_SUB_FDISC_FAILED:
5ffd51a5 238 zfcp_fsf_link_down_info_eval(req, "fssrld2", ldi);
1da177e4 239 break;
c41f8cbd 240 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
5ffd51a5 241 zfcp_fsf_link_down_info_eval(req, "fssrld3", NULL);
c41f8cbd
SS		 242 };
243}
1da177e4 244
c41f8cbd
SS		 245static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
246{
247 struct zfcp_adapter *adapter = req->adapter;
248 struct fsf_status_read_buffer *sr_buf = req->data;
1da177e4 249
c41f8cbd 250 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
5771710b 251 zfcp_dbf_hba_fsf_unsol("dism", adapter->dbf, sr_buf);
a4623c46 252 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd
SS		 253 zfcp_fsf_req_free(req);
254 return;
255 }
1da177e4 256
5771710b 257 zfcp_dbf_hba_fsf_unsol("read", adapter->dbf, sr_buf);
1da177e4 258
c41f8cbd
SS		 259 switch (sr_buf->status_type) {
260 case FSF_STATUS_READ_PORT_CLOSED:
261 zfcp_fsf_status_read_port_closed(req);
1da177e4 262 break;
c41f8cbd
SS		 263 case FSF_STATUS_READ_INCOMING_ELS:
264 zfcp_fc_incoming_els(req);
1da177e4 265 break;
c41f8cbd 266 case FSF_STATUS_READ_SENSE_DATA_AVAIL:
1da177e4 267 break;
c41f8cbd 268 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
ff3b24fa
CS		 269 dev_warn(&adapter->ccw_device->dev,
270 "The error threshold for checksum statistics "
271 "has been exceeded\n");
5771710b 272 zfcp_dbf_hba_berr(adapter->dbf, req);
1da177e4 273 break;
c41f8cbd
SS		 274 case FSF_STATUS_READ_LINK_DOWN:
275 zfcp_fsf_status_read_link_down(req);
276 break;
277 case FSF_STATUS_READ_LINK_UP:
278 dev_info(&adapter->ccw_device->dev,
ff3b24fa 279 "The local link has been restored\n");
c41f8cbd 280 /* All ports should be marked as ready to run again */
5ffd51a5 281 zfcp_erp_modify_adapter_status(adapter, "fssrh_1", NULL,
c41f8cbd
SS		 282 ZFCP_STATUS_COMMON_RUNNING,
283 ZFCP_SET);
284 zfcp_erp_adapter_reopen(adapter,
285 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
286 ZFCP_STATUS_COMMON_ERP_FAILED,
5ffd51a5 287 "fssrh_2", req);
c41f8cbd
SS		 288 break;
289 case FSF_STATUS_READ_NOTIFICATION_LOST:
290 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
5ffd51a5
SS		 291 zfcp_erp_adapter_access_changed(adapter, "fssrh_3",
292 req);
c41f8cbd
SS		 293 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
294 schedule_work(&adapter->scan_work);
295 break;
296 case FSF_STATUS_READ_CFDC_UPDATED:
5ffd51a5 297 zfcp_erp_adapter_access_changed(adapter, "fssrh_4", req);
c41f8cbd
SS		 298 break;
299 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
300 adapter->adapter_features = sr_buf->payload.word[0];
1da177e4 301 break;
1da177e4
LT		 302 }
303
a4623c46 304 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd 305 zfcp_fsf_req_free(req);
1da177e4 306
c41f8cbd 307 atomic_inc(&adapter->stat_miss);
4544683a 308 queue_work(adapter->work_queue, &adapter->stat_work);
c41f8cbd 309}
1da177e4 310
c41f8cbd
SS		 311static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
312{
313 switch (req->qtcb->header.fsf_status_qual.word[0]) {
314 case FSF_SQ_FCP_RSP_AVAILABLE:
315 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
316 case FSF_SQ_NO_RETRY_POSSIBLE:
317 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
318 return;
319 case FSF_SQ_COMMAND_ABORTED:
320 req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
321 break;
322 case FSF_SQ_NO_RECOM:
323 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 324 "The FCP adapter reported a problem "
325 "that cannot be recovered\n");
5ffd51a5 326 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1", req);
c41f8cbd
SS		 327 break;
328 }
329 /* all non-return stats set FSFREQ_ERROR*/
330 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 331}
332
c41f8cbd 333static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
1da177e4 334{
c41f8cbd
SS		 335 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
336 return;
1da177e4 337
c41f8cbd
SS		 338 switch (req->qtcb->header.fsf_status) {
339 case FSF_UNKNOWN_COMMAND:
340 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa 341 "The FCP adapter does not recognize the command 0x%x\n",
c41f8cbd 342 req->qtcb->header.fsf_command);
5ffd51a5 343 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1", req);
c41f8cbd
SS		 344 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
345 break;
346 case FSF_ADAPTER_STATUS_AVAILABLE:
347 zfcp_fsf_fsfstatus_qual_eval(req);
348 break;
349 }
350}
1da177e4 351
c41f8cbd
SS		 352static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
353{
354 struct zfcp_adapter *adapter = req->adapter;
355 struct fsf_qtcb *qtcb = req->qtcb;
356 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
1da177e4 357
5771710b 358 zfcp_dbf_hba_fsf_response(req);
1da177e4 359
c41f8cbd
SS		 360 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
361 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
362 ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
363 return;
364 }
1da177e4 365
c41f8cbd
SS		 366 switch (qtcb->prefix.prot_status) {
367 case FSF_PROT_GOOD:
368 case FSF_PROT_FSF_STATUS_PRESENTED:
369 return;
370 case FSF_PROT_QTCB_VERSION_ERROR:
371 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 372 "QTCB version 0x%x not supported by FCP adapter "
373 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION,
374 psq->word[0], psq->word[1]);
5ffd51a5 375 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1", req);
c41f8cbd
SS		 376 break;
377 case FSF_PROT_ERROR_STATE:
378 case FSF_PROT_SEQ_NUMB_ERROR:
5ffd51a5 379 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2", req);
c41f8cbd
SS		 380 req->status |= ZFCP_STATUS_FSFREQ_RETRY;
381 break;
382 case FSF_PROT_UNSUPP_QTCB_TYPE:
383 dev_err(&adapter->ccw_device->dev,
ff3b24fa 384 "The QTCB type is not supported by the FCP adapter\n");
5ffd51a5 385 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3", req);
c41f8cbd
SS		 386 break;
387 case FSF_PROT_HOST_CONNECTION_INITIALIZING:
388 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
389 &adapter->status);
390 break;
391 case FSF_PROT_DUPLICATE_REQUEST_ID:
392 dev_err(&adapter->ccw_device->dev,
ff3b24fa 393 "0x%Lx is an ambiguous request identifier\n",
c41f8cbd 394 (unsigned long long)qtcb->bottom.support.req_handle);
5ffd51a5 395 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4", req);
c41f8cbd
SS		 396 break;
397 case FSF_PROT_LINK_DOWN:
5ffd51a5
SS		 398 zfcp_fsf_link_down_info_eval(req, "fspse_5",
399 &psq->link_down_info);
c41f8cbd 400 /* FIXME: reopening adapter now? better wait for link up */
5ffd51a5 401 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6", req);
c41f8cbd
SS		 402 break;
403 case FSF_PROT_REEST_QUEUE:
404 /* All ports should be marked as ready to run again */
5ffd51a5 405 zfcp_erp_modify_adapter_status(adapter, "fspse_7", NULL,
c41f8cbd
SS		 406 ZFCP_STATUS_COMMON_RUNNING,
407 ZFCP_SET);
408 zfcp_erp_adapter_reopen(adapter,
409 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
5ffd51a5
SS		 410 ZFCP_STATUS_COMMON_ERP_FAILED,
411 "fspse_8", req);
c41f8cbd
SS		 412 break;
413 default:
414 dev_err(&adapter->ccw_device->dev,
ff3b24fa 415 "0x%x is not a valid transfer protocol status\n",
c41f8cbd 416 qtcb->prefix.prot_status);
5ffd51a5 417 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9", req);
c41f8cbd
SS		 418 }
419 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 420}
421
c41f8cbd
SS		 422/**
423 * zfcp_fsf_req_complete - process completion of a FSF request
424 * @fsf_req: The FSF request that has been completed.
425 *
426 * When a request has been completed either from the FCP adapter,
427 * or it has been dismissed due to a queue shutdown, this function
428 * is called to process the completion status and trigger further
429 * events related to the FSF request.
430 */
bd63eaf4 431static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
1da177e4 432{
c41f8cbd
SS		 433 if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
434 zfcp_fsf_status_read_handler(req);
435 return;
436 }
1da177e4 437
c41f8cbd
SS		 438 del_timer(&req->timer);
439 zfcp_fsf_protstatus_eval(req);
440 zfcp_fsf_fsfstatus_eval(req);
441 req->handler(req);
1da177e4 442
c41f8cbd 443 if (req->erp_action)
287ac01a 444 zfcp_erp_notify(req->erp_action, 0);
1da177e4 445
c41f8cbd
SS		 446 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
447 zfcp_fsf_req_free(req);
448 else
058b8647 449 complete(&req->completion);
c41f8cbd 450}
1da177e4 451
bd63eaf4
SS		 452/**
453 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
454 * @adapter: pointer to struct zfcp_adapter
455 *
456 * Never ever call this without shutting down the adapter first.
457 * Otherwise the adapter would continue using and corrupting s390 storage.
458 * Included BUG_ON() call to ensure this is done.
459 * ERP is supposed to be the only user of this function.
460 */
461void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
462{
463 struct zfcp_fsf_req *req, *tmp;
464 unsigned long flags;
465 LIST_HEAD(remove_queue);
466 unsigned int i;
467
468 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
469 spin_lock_irqsave(&adapter->req_list_lock, flags);
470 for (i = 0; i < REQUEST_LIST_SIZE; i++)
471 list_splice_init(&adapter->req_list[i], &remove_queue);
472 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
473
474 list_for_each_entry_safe(req, tmp, &remove_queue, list) {
475 list_del(&req->list);
476 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
477 zfcp_fsf_req_complete(req);
478 }
479}
480
c41f8cbd
SS		 481static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
482{
483 struct fsf_qtcb_bottom_config *bottom;
484 struct zfcp_adapter *adapter = req->adapter;
485 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 486
c41f8cbd 487 bottom = &req->qtcb->bottom.config;
1da177e4 488
c41f8cbd
SS		 489 if (req->data)
490 memcpy(req->data, bottom, sizeof(*bottom));
491
492 fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
493 fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
494 fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
495 fc_host_speed(shost) = bottom->fc_link_speed;
496 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
497
498 adapter->hydra_version = bottom->adapter_type;
499 adapter->timer_ticks = bottom->timer_interval;
500
501 if (fc_host_permanent_port_name(shost) == -1)
502 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
503
504 switch (bottom->fc_topology) {
505 case FSF_TOPO_P2P:
506 adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
507 adapter->peer_wwpn = bottom->plogi_payload.wwpn;
508 adapter->peer_wwnn = bottom->plogi_payload.wwnn;
509 fc_host_port_type(shost) = FC_PORTTYPE_PTP;
c41f8cbd
SS		 510 break;
511 case FSF_TOPO_FABRIC:
512 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
c41f8cbd
SS		 513 break;
514 case FSF_TOPO_AL:
515 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
dceab655 516 /* fall through */
c41f8cbd 517 default:
c41f8cbd 518 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 519 "Unknown or unsupported arbitrated loop "
520 "fibre channel topology detected\n");
5ffd51a5 521 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1", req);
c41f8cbd 522 return -EIO;
1da177e4 523 }
c41f8cbd 524
1da177e4
LT		 525 return 0;
526}
527
c41f8cbd 528static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
553448f6
CS		 529{
530 struct zfcp_adapter *adapter = req->adapter;
c41f8cbd
SS		 531 struct fsf_qtcb *qtcb = req->qtcb;
532 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
533 struct Scsi_Host *shost = adapter->scsi_host;
553448f6 534
c41f8cbd
SS		 535 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
536 return;
1da177e4 537
c41f8cbd
SS		 538 adapter->fsf_lic_version = bottom->lic_version;
539 adapter->adapter_features = bottom->adapter_features;
540 adapter->connection_features = bottom->connection_features;
541 adapter->peer_wwpn = 0;
542 adapter->peer_wwnn = 0;
543 adapter->peer_d_id = 0;
8a36e453 544
c41f8cbd
SS		 545 switch (qtcb->header.fsf_status) {
546 case FSF_GOOD:
547 if (zfcp_fsf_exchange_config_evaluate(req))
548 return;
1da177e4 549
c41f8cbd
SS		 550 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
551 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 552 "FCP adapter maximum QTCB size (%d bytes) "
553 "is too small\n",
554 bottom->max_qtcb_size);
5ffd51a5 555 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1", req);
c41f8cbd
SS		 556 return;
557 }
558 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
559 &adapter->status);
1da177e4 560 break;
c41f8cbd
SS		 561 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
562 fc_host_node_name(shost) = 0;
563 fc_host_port_name(shost) = 0;
564 fc_host_port_id(shost) = 0;
565 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
566 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
567 adapter->hydra_version = 0;
1da177e4 568
c41f8cbd
SS		 569 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
570 &adapter->status);
1da177e4 571
5ffd51a5 572 zfcp_fsf_link_down_info_eval(req, "fsecdh2",
c41f8cbd 573 &qtcb->header.fsf_status_qual.link_down_info);
1da177e4 574 break;
c41f8cbd 575 default:
5ffd51a5 576 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3", req);
c41f8cbd
SS		 577 return;
578 }
1da177e4 579
c41f8cbd
SS		 580 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
581 adapter->hardware_version = bottom->hardware_version;
582 memcpy(fc_host_serial_number(shost), bottom->serial_number,
583 min(FC_SERIAL_NUMBER_SIZE, 17));
584 EBCASC(fc_host_serial_number(shost),
585 min(FC_SERIAL_NUMBER_SIZE, 17));
586 }
1da177e4 587
c41f8cbd
SS		 588 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
589 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 590 "The FCP adapter only supports newer "
591 "control block versions\n");
5ffd51a5 592 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4", req);
c41f8cbd
SS		 593 return;
594 }
595 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
596 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 597 "The FCP adapter only supports older "
598 "control block versions\n");
5ffd51a5 599 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5", req);
c41f8cbd
SS		 600 }
601}
1da177e4 602
c41f8cbd
SS		 603static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
604{
605 struct zfcp_adapter *adapter = req->adapter;
606 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
607 struct Scsi_Host *shost = adapter->scsi_host;
1da177e4 608
c41f8cbd
SS		 609 if (req->data)
610 memcpy(req->data, bottom, sizeof(*bottom));
9eb69aff 611
0282985d 612 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) {
c41f8cbd 613 fc_host_permanent_port_name(shost) = bottom->wwpn;
0282985d
CS		 614 fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
615 } else
c41f8cbd
SS		 616 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
617 fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
618 fc_host_supported_speeds(shost) = bottom->supported_speed;
619}
1da177e4 620
c41f8cbd
SS		 621static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
622{
c41f8cbd
SS		 623 struct fsf_qtcb *qtcb = req->qtcb;
624
625 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
626 return;
627
628 switch (qtcb->header.fsf_status) {
629 case FSF_GOOD:
630 zfcp_fsf_exchange_port_evaluate(req);
c41f8cbd
SS		 631 break;
632 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
633 zfcp_fsf_exchange_port_evaluate(req);
5ffd51a5 634 zfcp_fsf_link_down_info_eval(req, "fsepdh1",
c41f8cbd 635 &qtcb->header.fsf_status_qual.link_down_info);
aef4a983 636 break;
1da177e4 637 }
c41f8cbd 638}
d26ab06e 639
564e1c86 640static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio)
c41f8cbd 641{
564e1c86 642 struct zfcp_qdio_queue *req_q = &qdio->req_q;
c41f8cbd 643
564e1c86 644 spin_lock_bh(&qdio->req_q_lock);
7001f0c4
MP		 645 if (atomic_read(&req_q->count))
646 return 1;
564e1c86 647 spin_unlock_bh(&qdio->req_q_lock);
7001f0c4
MP		 648 return 0;
649}
650
564e1c86 651static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio)
7001f0c4 652{
564e1c86 653 struct zfcp_adapter *adapter = qdio->adapter;
7001f0c4 654 long ret;
dedbc2b3 655
564e1c86
SS		 656 spin_unlock_bh(&qdio->req_q_lock);
657 ret = wait_event_interruptible_timeout(qdio->req_q_wq,
658 zfcp_fsf_sbal_check(qdio), 5 * HZ);
c41f8cbd
SS		 659 if (ret > 0)
660 return 0;
cbf1ed02 661 if (!ret) {
564e1c86 662 atomic_inc(&qdio->req_q_full);
cbf1ed02
CS		 663 /* assume hanging outbound queue, try queue recovery */
664 zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL);
665 }
7001f0c4 666
564e1c86 667 spin_lock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 668 return -EIO;
669}
670
a4623c46 671static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool)
c41f8cbd
SS		 672{
673 struct zfcp_fsf_req *req;
a4623c46
SS		 674
675 if (likely(pool))
676 req = mempool_alloc(pool, GFP_ATOMIC);
677 else
678 req = kmalloc(sizeof(*req), GFP_ATOMIC);
679
680 if (unlikely(!req))
c41f8cbd 681 return NULL;
a4623c46 682
c41f8cbd 683 memset(req, 0, sizeof(*req));
88f2a977 684 req->pool = pool;
c41f8cbd
SS		 685 return req;
686}
687
a4623c46 688static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool)
c41f8cbd 689{
a4623c46 690 struct fsf_qtcb *qtcb;
c41f8cbd
SS		 691
692 if (likely(pool))
693 qtcb = mempool_alloc(pool, GFP_ATOMIC);
694 else
a4623c46
SS		 695 qtcb = kmem_cache_alloc(zfcp_data.qtcb_cache, GFP_ATOMIC);
696
c41f8cbd
SS		 697 if (unlikely(!qtcb))
698 return NULL;
699
700 memset(qtcb, 0, sizeof(*qtcb));
a4623c46 701 return qtcb;
c41f8cbd
SS		 702}
703
564e1c86 704static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
09a46c6e 705 u32 fsf_cmd, mempool_t *pool)
1da177e4 706{
44cc76f2 707 struct qdio_buffer_element *sbale;
564e1c86
SS		 708 struct zfcp_qdio_queue *req_q = &qdio->req_q;
709 struct zfcp_adapter *adapter = qdio->adapter;
a4623c46 710 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool);
1da177e4 711
c41f8cbd 712 if (unlikely(!req))
1e9b1643 713 return ERR_PTR(-ENOMEM);
1da177e4 714
c41f8cbd
SS		 715 if (adapter->req_no == 0)
716 adapter->req_no++;
1da177e4 717
c41f8cbd
SS		 718 INIT_LIST_HEAD(&req->list);
719 init_timer(&req->timer);
058b8647 720 init_completion(&req->completion);
1da177e4 721
c41f8cbd
SS		 722 req->adapter = adapter;
723 req->fsf_command = fsf_cmd;
52bfb558 724 req->req_id = adapter->req_no;
42428f74
SS		 725 req->queue_req.sbal_number = 1;
726 req->queue_req.sbal_first = req_q->first;
727 req->queue_req.sbal_last = req_q->first;
728 req->queue_req.sbale_curr = 1;
c41f8cbd 729
564e1c86 730 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 731 sbale[0].addr = (void *) req->req_id;
732 sbale[0].flags |= SBAL_FLAGS0_COMMAND;
733
a4623c46
SS		 734 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) {
735 if (likely(pool))
736 req->qtcb = zfcp_qtcb_alloc(adapter->pool.qtcb_pool);
737 else
738 req->qtcb = zfcp_qtcb_alloc(NULL);
739
740 if (unlikely(!req->qtcb)) {
741 zfcp_fsf_req_free(req);
742 return ERR_PTR(-ENOMEM);
743 }
744
564e1c86 745 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
c41f8cbd
SS		 746 req->qtcb->prefix.req_id = req->req_id;
747 req->qtcb->prefix.ulp_info = 26;
748 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
749 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
750 req->qtcb->header.req_handle = req->req_id;
751 req->qtcb->header.fsf_command = req->fsf_command;
752 req->seq_no = adapter->fsf_req_seq_no;
753 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
754 sbale[1].addr = (void *) req->qtcb;
755 sbale[1].length = sizeof(struct fsf_qtcb);
756 }
757
758 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
759 zfcp_fsf_req_free(req);
760 return ERR_PTR(-EIO);
761 }
951f746f 762
c41f8cbd 763 return req;
1da177e4
LT		 764}
765
c41f8cbd
SS		 766static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
767{
768 struct zfcp_adapter *adapter = req->adapter;
564e1c86 769 struct zfcp_qdio *qdio = adapter->qdio;
135ea137
MP		 770 unsigned long flags;
771 int idx;
772 int with_qtcb = (req->qtcb != NULL);
c41f8cbd
SS		 773
774 /* put allocated FSF request into hash table */
45316a86 775 spin_lock_irqsave(&adapter->req_list_lock, flags);
c41f8cbd
SS		 776 idx = zfcp_reqlist_hash(req->req_id);
777 list_add_tail(&req->list, &adapter->req_list[idx]);
45316a86 778 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
c41f8cbd 779
564e1c86 780 req->queue_req.qdio_outb_usage = atomic_read(&qdio->req_q.count);
c41f8cbd 781 req->issued = get_clock();
564e1c86 782 if (zfcp_qdio_send(qdio, &req->queue_req)) {
c41f8cbd 783 del_timer(&req->timer);
3765138a
CS		 784 spin_lock_irqsave(&adapter->req_list_lock, flags);
785 /* lookup request again, list might have changed */
786 if (zfcp_reqlist_find_safe(adapter, req))
787 zfcp_reqlist_remove(adapter, req);
788 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
5ffd51a5 789 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1", req);
c41f8cbd
SS		 790 return -EIO;
791 }
792
793 /* Don't increase for unsolicited status */
135ea137 794 if (with_qtcb)
c41f8cbd 795 adapter->fsf_req_seq_no++;
52bfb558 796 adapter->req_no++;
c41f8cbd
SS		 797
798 return 0;
799}
800
801/**
802 * zfcp_fsf_status_read - send status read request
803 * @adapter: pointer to struct zfcp_adapter
804 * @req_flags: request flags
805 * Returns: 0 on success, ERROR otherwise
1da177e4 806 */
564e1c86 807int zfcp_fsf_status_read(struct zfcp_qdio *qdio)
1da177e4 808{
564e1c86 809 struct zfcp_adapter *adapter = qdio->adapter;
c41f8cbd
SS		 810 struct zfcp_fsf_req *req;
811 struct fsf_status_read_buffer *sr_buf;
44cc76f2 812 struct qdio_buffer_element *sbale;
c41f8cbd 813 int retval = -EIO;
1da177e4 814
564e1c86
SS		 815 spin_lock_bh(&qdio->req_q_lock);
816 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 817 goto out;
818
564e1c86 819 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS,
a4623c46 820 adapter->pool.status_read_req);
025270f0 821 if (IS_ERR(req)) {
c41f8cbd
SS		 822 retval = PTR_ERR(req);
823 goto out;
1da177e4
LT		 824 }
825
564e1c86 826 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 827 sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
42428f74 828 req->queue_req.sbale_curr = 2;
c41f8cbd 829
a4623c46 830 sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC);
c41f8cbd
SS		 831 if (!sr_buf) {
832 retval = -ENOMEM;
833 goto failed_buf;
834 }
835 memset(sr_buf, 0, sizeof(*sr_buf));
836 req->data = sr_buf;
564e1c86 837 sbale = zfcp_qdio_sbale_curr(qdio, &req->queue_req);
c41f8cbd
SS		 838 sbale->addr = (void *) sr_buf;
839 sbale->length = sizeof(*sr_buf);
059c97d0 840
c41f8cbd
SS		 841 retval = zfcp_fsf_req_send(req);
842 if (retval)
843 goto failed_req_send;
1da177e4 844
c41f8cbd
SS		 845 goto out;
846
847failed_req_send:
a4623c46 848 mempool_free(sr_buf, adapter->pool.status_read_data);
c41f8cbd
SS		 849failed_buf:
850 zfcp_fsf_req_free(req);
5771710b 851 zfcp_dbf_hba_fsf_unsol("fail", adapter->dbf, NULL);
c41f8cbd 852out:
564e1c86 853 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 854 return retval;
855}
856
857static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
858{
859 struct zfcp_unit *unit = req->data;
860 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
861
862 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
863 return;
864
865 switch (req->qtcb->header.fsf_status) {
1da177e4 866 case FSF_PORT_HANDLE_NOT_VALID:
c41f8cbd 867 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5
SS		 868 zfcp_erp_adapter_reopen(unit->port->adapter, 0,
869 "fsafch1", req);
c41f8cbd 870 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 871 }
872 break;
1da177e4 873 case FSF_LUN_HANDLE_NOT_VALID:
c41f8cbd 874 if (fsq->word[0] == fsq->word[1]) {
5ffd51a5 875 zfcp_erp_port_reopen(unit->port, 0, "fsafch2", req);
c41f8cbd 876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 877 }
878 break;
1da177e4 879 case FSF_FCP_COMMAND_DOES_NOT_EXIST:
c41f8cbd 880 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1da177e4 881 break;
1da177e4 882 case FSF_PORT_BOXED:
5ffd51a5 883 zfcp_erp_port_boxed(unit->port, "fsafch3", req);
c41f8cbd
SS		 884 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
885 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 886 break;
1da177e4 887 case FSF_LUN_BOXED:
5ffd51a5 888 zfcp_erp_unit_boxed(unit, "fsafch4", req);
c41f8cbd
SS		 889 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
890 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 891 break;
1da177e4 892 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 893 switch (fsq->word[0]) {
1da177e4 894 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 895 zfcp_test_link(unit->port);
dceab655 896 /* fall through */
1da177e4 897 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 898 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 899 break;
1da177e4
LT		 900 }
901 break;
1da177e4 902 case FSF_GOOD:
c41f8cbd 903 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1da177e4 904 break;
1da177e4 905 }
1da177e4
LT		 906}
907
908/**
c41f8cbd
SS		 909 * zfcp_fsf_abort_fcp_command - abort running SCSI command
910 * @old_req_id: unsigned long
c41f8cbd 911 * @unit: pointer to struct zfcp_unit
c41f8cbd 912 * Returns: pointer to struct zfcp_fsf_req
1da177e4 913 */
1da177e4 914
c41f8cbd 915struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
63caf367 916 struct zfcp_unit *unit)
1da177e4 917{
44cc76f2 918 struct qdio_buffer_element *sbale;
c41f8cbd 919 struct zfcp_fsf_req *req = NULL;
564e1c86 920 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
8a36e453 921
564e1c86
SS		 922 spin_lock_bh(&qdio->req_q_lock);
923 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 924 goto out;
564e1c86
SS		 925 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND,
926 qdio->adapter->pool.scsi_abort);
633528c3
SS		 927 if (IS_ERR(req)) {
928 req = NULL;
c41f8cbd 929 goto out;
633528c3 930 }
2abbe866 931
c41f8cbd
SS		 932 if (unlikely(!(atomic_read(&unit->status) &
933 ZFCP_STATUS_COMMON_UNBLOCKED)))
934 goto out_error_free;
1da177e4 935
564e1c86 936 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 937 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
938 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 939
c41f8cbd
SS		 940 req->data = unit;
941 req->handler = zfcp_fsf_abort_fcp_command_handler;
942 req->qtcb->header.lun_handle = unit->handle;
943 req->qtcb->header.port_handle = unit->port->handle;
944 req->qtcb->bottom.support.req_handle = (u64) old_req_id;
945
946 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
947 if (!zfcp_fsf_req_send(req))
948 goto out;
949
950out_error_free:
951 zfcp_fsf_req_free(req);
952 req = NULL;
953out:
564e1c86 954 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 955 return req;
1da177e4
LT		 956}
957
c41f8cbd 958static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
1da177e4 959{
c41f8cbd
SS		 960 struct zfcp_adapter *adapter = req->adapter;
961 struct zfcp_send_ct *send_ct = req->data;
c41f8cbd 962 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 963
c41f8cbd 964 send_ct->status = -EINVAL;
1da177e4 965
c41f8cbd 966 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 967 goto skip_fsfstatus;
968
1da177e4 969 switch (header->fsf_status) {
1da177e4 970 case FSF_GOOD:
5771710b 971 zfcp_dbf_san_ct_response(req);
c41f8cbd 972 send_ct->status = 0;
1da177e4 973 break;
1da177e4 974 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 975 zfcp_fsf_class_not_supp(req);
1da177e4 976 break;
1da177e4 977 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 978 switch (header->fsf_status_qual.word[0]){
979 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 980 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 981 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 982 break;
1da177e4
LT		 983 }
984 break;
1da177e4 985 case FSF_ACCESS_DENIED:
1da177e4 986 break;
1da177e4 987 case FSF_PORT_BOXED:
c41f8cbd
SS		 988 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
989 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 990 break;
c41f8cbd 991 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 992 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1", req);
dceab655 993 /* fall through */
c41f8cbd 994 case FSF_GENERIC_COMMAND_REJECTED:
1da177e4 995 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 996 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 997 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 998 case FSF_SBAL_MISMATCH:
c41f8cbd 999 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1000 break;
1001 }
1002
1003skip_fsfstatus:
c41f8cbd 1004 if (send_ct->handler)
1da177e4 1005 send_ct->handler(send_ct->handler_data);
c41f8cbd 1006}
1da177e4 1007
426f6059
CS		 1008static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale,
1009 struct scatterlist *sg_req,
1010 struct scatterlist *sg_resp)
1011{
1012 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1013 sbale[2].addr = sg_virt(sg_req);
1014 sbale[2].length = sg_req->length;
1015 sbale[3].addr = sg_virt(sg_resp);
1016 sbale[3].length = sg_resp->length;
1017 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1018}
1019
1020static int zfcp_fsf_one_sbal(struct scatterlist *sg)
1021{
1022 return sg_is_last(sg) && sg->length <= PAGE_SIZE;
1023}
1024
39eb7e9a
CS		 1025static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
1026 struct scatterlist *sg_req,
1027 struct scatterlist *sg_resp,
1028 int max_sbals)
c41f8cbd 1029{
42428f74 1030 struct zfcp_adapter *adapter = req->adapter;
564e1c86 1031 struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio,
42428f74
SS		 1032 &req->queue_req);
1033 u32 feat = adapter->adapter_features;
c41f8cbd
SS		 1034 int bytes;
1035
39eb7e9a 1036 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) {
426f6059 1037 if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp))
39eb7e9a
CS		 1038 return -EOPNOTSUPP;
1039
426f6059
CS		 1040 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
1041 return 0;
1042 }
1043
1044 /* use single, unchained SBAL if it can hold the request */
1045 if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) {
1046 zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp);
39eb7e9a
CS		 1047 return 0;
1048 }
1049
564e1c86 1050 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
42428f74 1051 SBAL_FLAGS0_TYPE_WRITE_READ,
c41f8cbd
SS		 1052 sg_req, max_sbals);
1053 if (bytes <= 0)
9072df4d 1054 return -EIO;
c41f8cbd 1055 req->qtcb->bottom.support.req_buf_length = bytes;
42428f74 1056 req->queue_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
c41f8cbd 1057
564e1c86 1058 bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->queue_req,
42428f74 1059 SBAL_FLAGS0_TYPE_WRITE_READ,
c41f8cbd
SS		 1060 sg_resp, max_sbals);
1061 if (bytes <= 0)
9072df4d 1062 return -EIO;
c41f8cbd
SS		 1063 req->qtcb->bottom.support.resp_buf_length = bytes;
1064
1065 return 0;
1da177e4
LT		 1066}
1067
1068/**
c41f8cbd
SS		 1069 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1070 * @ct: pointer to struct zfcp_send_ct with data for request
1071 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1da177e4 1072 */
799b76d0 1073int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1da177e4 1074{
5ab944f9 1075 struct zfcp_wka_port *wka_port = ct->wka_port;
564e1c86 1076 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
c41f8cbd
SS		 1077 struct zfcp_fsf_req *req;
1078 int ret = -EIO;
1da177e4 1079
564e1c86
SS		 1080 spin_lock_bh(&qdio->req_q_lock);
1081 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1082 goto out;
1da177e4 1083
564e1c86 1084 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
09a46c6e 1085
025270f0 1086 if (IS_ERR(req)) {
c41f8cbd
SS		 1087 ret = PTR_ERR(req);
1088 goto out;
3f0ca62a
CS		 1089 }
1090
09a46c6e 1091 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
39eb7e9a
CS		 1092 ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp,
1093 FSF_MAX_SBALS_PER_REQ);
553448f6 1094 if (ret)
1da177e4 1095 goto failed_send;
1da177e4 1096
c41f8cbd 1097 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1098 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1099 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1100 req->qtcb->bottom.support.timeout = ct->timeout;
1101 req->data = ct;
1102
5771710b 1103 zfcp_dbf_san_ct_request(req);
799b76d0 1104 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1da177e4 1105
c41f8cbd
SS		 1106 ret = zfcp_fsf_req_send(req);
1107 if (ret)
1108 goto failed_send;
1da177e4 1109
c41f8cbd 1110 goto out;
1da177e4 1111
c41f8cbd
SS		 1112failed_send:
1113 zfcp_fsf_req_free(req);
c41f8cbd 1114out:
564e1c86 1115 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1116 return ret;
1da177e4
LT		 1117}
1118
c41f8cbd 1119static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1120{
c41f8cbd
SS		 1121 struct zfcp_send_els *send_els = req->data;
1122 struct zfcp_port *port = send_els->port;
1123 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1124
c41f8cbd 1125 send_els->status = -EINVAL;
1da177e4 1126
c41f8cbd 1127 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1128 goto skip_fsfstatus;
1129
1130 switch (header->fsf_status) {
1da177e4 1131 case FSF_GOOD:
5771710b 1132 zfcp_dbf_san_els_response(req);
c41f8cbd 1133 send_els->status = 0;
1da177e4 1134 break;
1da177e4 1135 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1136 zfcp_fsf_class_not_supp(req);
1da177e4 1137 break;
1da177e4 1138 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1139 switch (header->fsf_status_qual.word[0]){
1140 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13
AH		 1141 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
1142 zfcp_test_link(port);
c41f8cbd 1143 /*fall through */
1da177e4 1144 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1145 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1146 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1147 break;
1da177e4
LT		 1148 }
1149 break;
1da177e4 1150 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1151 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1152 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1153 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1154 break;
1da177e4 1155 case FSF_ACCESS_DENIED:
dc577d55
CS		 1156 if (port)
1157 zfcp_fsf_access_denied_port(req, port);
1da177e4 1158 break;
c41f8cbd
SS		 1159 case FSF_SBAL_MISMATCH:
1160 /* should never occure, avoided in zfcp_fsf_send_els */
1161 /* fall through */
1da177e4 1162 default:
c41f8cbd 1163 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1164 break;
1165 }
1da177e4 1166skip_fsfstatus:
aa551daf 1167 if (send_els->handler)
1da177e4 1168 send_els->handler(send_els->handler_data);
c41f8cbd 1169}
1da177e4 1170
c41f8cbd
SS		 1171/**
1172 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1173 * @els: pointer to struct zfcp_send_els with data for the command
1174 */
1175int zfcp_fsf_send_els(struct zfcp_send_els *els)
1176{
1177 struct zfcp_fsf_req *req;
564e1c86 1178 struct zfcp_qdio *qdio = els->adapter->qdio;
c41f8cbd
SS		 1179 struct fsf_qtcb_bottom_support *bottom;
1180 int ret = -EIO;
1181
564e1c86
SS		 1182 spin_lock_bh(&qdio->req_q_lock);
1183 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1184 goto out;
09a46c6e 1185
564e1c86 1186 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
09a46c6e 1187
025270f0 1188 if (IS_ERR(req)) {
c41f8cbd
SS		 1189 ret = PTR_ERR(req);
1190 goto out;
1191 }
1192
09a46c6e 1193 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
39eb7e9a 1194 ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2);
44cc76f2 1195
c41f8cbd
SS		 1196 if (ret)
1197 goto failed_send;
1198
1199 bottom = &req->qtcb->bottom.support;
1200 req->handler = zfcp_fsf_send_els_handler;
1201 bottom->d_id = els->d_id;
1202 bottom->service_class = FSF_CLASS_3;
1203 bottom->timeout = 2 * R_A_TOV;
1204 req->data = els;
1205
5771710b 1206 zfcp_dbf_san_els_request(req);
c41f8cbd
SS		 1207
1208 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1209 ret = zfcp_fsf_req_send(req);
1210 if (ret)
1211 goto failed_send;
1212
1213 goto out;
1214
1215failed_send:
1216 zfcp_fsf_req_free(req);
1217out:
564e1c86 1218 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1219 return ret;
1da177e4
LT		 1220}
1221
c41f8cbd 1222int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1223{
44cc76f2 1224 struct qdio_buffer_element *sbale;
c41f8cbd 1225 struct zfcp_fsf_req *req;
564e1c86 1226 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1227 int retval = -EIO;
1228
564e1c86
SS		 1229 spin_lock_bh(&qdio->req_q_lock);
1230 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1231 goto out;
09a46c6e 1232
564e1c86
SS		 1233 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1234 qdio->adapter->pool.erp_req);
09a46c6e 1235
025270f0 1236 if (IS_ERR(req)) {
c41f8cbd
SS		 1237 retval = PTR_ERR(req);
1238 goto out;
1da177e4
LT		 1239 }
1240
09a46c6e 1241 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1242 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1243 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1244 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1245
c41f8cbd 1246 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1247 FSF_FEATURE_CFDC |
1248 FSF_FEATURE_LUN_SHARING |
9eb69aff 1249 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1250 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1251 req->erp_action = erp_action;
1252 req->handler = zfcp_fsf_exchange_config_data_handler;
1253 erp_action->fsf_req = req;
1da177e4 1254
287ac01a 1255 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1256 retval = zfcp_fsf_req_send(req);
1da177e4 1257 if (retval) {
c41f8cbd 1258 zfcp_fsf_req_free(req);
1da177e4 1259 erp_action->fsf_req = NULL;
1da177e4 1260 }
c41f8cbd 1261out:
564e1c86 1262 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1263 return retval;
1264}
1da177e4 1265
564e1c86 1266int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1267 struct fsf_qtcb_bottom_config *data)
52ef11a7 1268{
44cc76f2 1269 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1270 struct zfcp_fsf_req *req = NULL;
1271 int retval = -EIO;
1272
564e1c86
SS		 1273 spin_lock_bh(&qdio->req_q_lock);
1274 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1275 goto out_unlock;
c41f8cbd 1276
564e1c86 1277 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
09a46c6e 1278
025270f0 1279 if (IS_ERR(req)) {
c41f8cbd 1280 retval = PTR_ERR(req);
ada81b74 1281 goto out_unlock;
52ef11a7
SS		 1282 }
1283
564e1c86 1284 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1285 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1286 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1287 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1288
c41f8cbd 1289 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1290 FSF_FEATURE_CFDC |
1291 FSF_FEATURE_LUN_SHARING |
1292 FSF_FEATURE_NOTIFICATION_LOST |
1293 FSF_FEATURE_UPDATE_ALERT;
1294
1295 if (data)
c41f8cbd 1296 req->data = data;
52ef11a7 1297
c41f8cbd
SS		 1298 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1299 retval = zfcp_fsf_req_send(req);
564e1c86 1300 spin_unlock_bh(&qdio->req_q_lock);
553448f6 1301 if (!retval)
058b8647 1302 wait_for_completion(&req->completion);
52ef11a7 1303
c41f8cbd 1304 zfcp_fsf_req_free(req);
ada81b74 1305 return retval;
52ef11a7 1306
ada81b74 1307out_unlock:
564e1c86 1308 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1309 return retval;
1310}
1311
1da177e4
LT		 1312/**
1313 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1314 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1315 * Returns: 0 on success, error otherwise
1da177e4 1316 */
c41f8cbd 1317int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1318{
564e1c86 1319 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
44cc76f2 1320 struct qdio_buffer_element *sbale;
c41f8cbd 1321 struct zfcp_fsf_req *req;
c41f8cbd 1322 int retval = -EIO;
1da177e4 1323
564e1c86 1324 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1325 return -EOPNOTSUPP;
1da177e4 1326
564e1c86
SS		 1327 spin_lock_bh(&qdio->req_q_lock);
1328 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1329 goto out;
09a46c6e 1330
564e1c86
SS		 1331 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1332 qdio->adapter->pool.erp_req);
09a46c6e 1333
025270f0 1334 if (IS_ERR(req)) {
c41f8cbd
SS		 1335 retval = PTR_ERR(req);
1336 goto out;
aef4a983
MS		 1337 }
1338
09a46c6e 1339 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1340 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1341 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1342 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1343
c41f8cbd
SS		 1344 req->handler = zfcp_fsf_exchange_port_data_handler;
1345 req->erp_action = erp_action;
1346 erp_action->fsf_req = req;
52ef11a7 1347
287ac01a 1348 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1349 retval = zfcp_fsf_req_send(req);
1da177e4 1350 if (retval) {
c41f8cbd 1351 zfcp_fsf_req_free(req);
52ef11a7
SS		 1352 erp_action->fsf_req = NULL;
1353 }
c41f8cbd 1354out:
564e1c86 1355 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1356 return retval;
1357}
1358
52ef11a7
SS		 1359/**
1360 * zfcp_fsf_exchange_port_data_sync - request information about local port
564e1c86 1361 * @qdio: pointer to struct zfcp_qdio
c41f8cbd
SS		 1362 * @data: pointer to struct fsf_qtcb_bottom_port
1363 * Returns: 0 on success, error otherwise
52ef11a7 1364 */
564e1c86 1365int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1366 struct fsf_qtcb_bottom_port *data)
52ef11a7 1367{
44cc76f2 1368 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1369 struct zfcp_fsf_req *req = NULL;
1370 int retval = -EIO;
52ef11a7 1371
564e1c86 1372 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1373 return -EOPNOTSUPP;
52ef11a7 1374
564e1c86
SS		 1375 spin_lock_bh(&qdio->req_q_lock);
1376 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1377 goto out_unlock;
c41f8cbd 1378
564e1c86 1379 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
09a46c6e 1380
025270f0 1381 if (IS_ERR(req)) {
c41f8cbd 1382 retval = PTR_ERR(req);
ada81b74 1383 goto out_unlock;
1da177e4
LT		 1384 }
1385
52ef11a7 1386 if (data)
c41f8cbd 1387 req->data = data;
52ef11a7 1388
564e1c86 1389 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1390 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1391 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1392
c41f8cbd
SS		 1393 req->handler = zfcp_fsf_exchange_port_data_handler;
1394 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1395 retval = zfcp_fsf_req_send(req);
564e1c86 1396 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1397
553448f6 1398 if (!retval)
058b8647
SS		 1399 wait_for_completion(&req->completion);
1400
c41f8cbd 1401 zfcp_fsf_req_free(req);
1da177e4 1402
1da177e4 1403 return retval;
ada81b74
CS		 1404
1405out_unlock:
564e1c86 1406 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1407 return retval;
1da177e4
LT		 1408}
1409
c41f8cbd 1410static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1411{
c41f8cbd
SS		 1412 struct zfcp_port *port = req->data;
1413 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1414 struct fsf_plogi *plogi;
1da177e4 1415
c41f8cbd 1416 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a17c5855 1417 goto out;
1da177e4 1418
1da177e4 1419 switch (header->fsf_status) {
1da177e4 1420 case FSF_PORT_ALREADY_OPEN:
1da177e4 1421 break;
1da177e4 1422 case FSF_ACCESS_DENIED:
c41f8cbd 1423 zfcp_fsf_access_denied_port(req, port);
1da177e4 1424 break;
1da177e4 1425 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1426 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1427 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1428 "remote port 0x%016Lx\n",
1429 (unsigned long long)port->wwpn);
5ffd51a5 1430 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1431 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1432 break;
1da177e4 1433 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1434 switch (header->fsf_status_qual.word[0]) {
1435 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1436 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1437 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1438 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1439 break;
1440 }
1441 break;
1da177e4 1442 case FSF_GOOD:
1da177e4 1443 port->handle = header->port_handle;
1da177e4
LT		 1444 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1445 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1446 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1447 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1448 &port->status);
1da177e4
LT		 1449 /* check whether D_ID has changed during open */
1450 /*
1451 * FIXME: This check is not airtight, as the FCP channel does
1452 * not monitor closures of target port connections caused on
1453 * the remote side. Thus, they might miss out on invalidating
1454 * locally cached WWPNs (and other N_Port parameters) of gone
1455 * target ports. So, our heroic attempt to make things safe
1456 * could be undermined by 'open port' response data tagged with
1457 * obsolete WWPNs. Another reason to monitor potential
1458 * connection closures ourself at least (by interpreting
1459 * incoming ELS' and unsolicited status). It just crosses my
1460 * mind that one should be able to cross-check by means of
1461 * another GID_PN straight after a port has been opened.
1462 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1463 */
c41f8cbd 1464 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1465 if (req->qtcb->bottom.support.els1_length >=
1466 FSF_PLOGI_MIN_LEN) {
c41f8cbd 1467 if (plogi->serv_param.wwpn != port->wwpn)
b98478d7 1468 port->d_id = 0;
c41f8cbd
SS		 1469 else {
1470 port->wwnn = plogi->serv_param.wwnn;
1471 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1472 }
1473 }
1474 break;
1da177e4 1475 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1476 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1477 break;
1478 }
a17c5855
MP		 1479
1480out:
1481 zfcp_port_put(port);
1da177e4
LT		 1482}
1483
c41f8cbd
SS		 1484/**
1485 * zfcp_fsf_open_port - create and send open port request
1486 * @erp_action: pointer to struct zfcp_erp_action
1487 * Returns: 0 on success, error otherwise
1da177e4 1488 */
c41f8cbd 1489int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1490{
44cc76f2 1491 struct qdio_buffer_element *sbale;
564e1c86 1492 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
a17c5855 1493 struct zfcp_port *port = erp_action->port;
564e1c86 1494 struct zfcp_fsf_req *req;
c41f8cbd
SS		 1495 int retval = -EIO;
1496
564e1c86
SS		 1497 spin_lock_bh(&qdio->req_q_lock);
1498 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1499 goto out;
1500
564e1c86
SS		 1501 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1502 qdio->adapter->pool.erp_req);
09a46c6e 1503
025270f0 1504 if (IS_ERR(req)) {
c41f8cbd 1505 retval = PTR_ERR(req);
1da177e4 1506 goto out;
c41f8cbd 1507 }
1da177e4 1508
09a46c6e 1509 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1510 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1511 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1512 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1513
c41f8cbd 1514 req->handler = zfcp_fsf_open_port_handler;
a17c5855
MP		 1515 req->qtcb->bottom.support.d_id = port->d_id;
1516 req->data = port;
c41f8cbd
SS		 1517 req->erp_action = erp_action;
1518 erp_action->fsf_req = req;
a17c5855 1519 zfcp_port_get(port);
c41f8cbd 1520
287ac01a 1521 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1522 retval = zfcp_fsf_req_send(req);
1da177e4 1523 if (retval) {
c41f8cbd 1524 zfcp_fsf_req_free(req);
1da177e4 1525 erp_action->fsf_req = NULL;
a17c5855 1526 zfcp_port_put(port);
1da177e4 1527 }
c41f8cbd 1528out:
564e1c86 1529 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1530 return retval;
1531}
1532
c41f8cbd 1533static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1534{
c41f8cbd 1535 struct zfcp_port *port = req->data;
1da177e4 1536
c41f8cbd 1537 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1538 return;
1da177e4 1539
c41f8cbd 1540 switch (req->qtcb->header.fsf_status) {
1da177e4 1541 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1542 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1543 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1544 break;
1da177e4 1545 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1546 break;
1da177e4 1547 case FSF_GOOD:
5ffd51a5 1548 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1549 ZFCP_STATUS_COMMON_OPEN,
1550 ZFCP_CLEAR);
1da177e4 1551 break;
1da177e4 1552 }
1da177e4
LT		 1553}
1554
c41f8cbd
SS		 1555/**
1556 * zfcp_fsf_close_port - create and send close port request
1557 * @erp_action: pointer to struct zfcp_erp_action
1558 * Returns: 0 on success, error otherwise
1da177e4 1559 */
c41f8cbd 1560int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1561{
44cc76f2 1562 struct qdio_buffer_element *sbale;
564e1c86 1563 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1564 struct zfcp_fsf_req *req;
1565 int retval = -EIO;
1566
564e1c86
SS		 1567 spin_lock_bh(&qdio->req_q_lock);
1568 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1569 goto out;
1570
564e1c86
SS		 1571 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1572 qdio->adapter->pool.erp_req);
09a46c6e 1573
025270f0 1574 if (IS_ERR(req)) {
c41f8cbd 1575 retval = PTR_ERR(req);
1da177e4 1576 goto out;
c41f8cbd 1577 }
1da177e4 1578
09a46c6e 1579 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1580 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1581 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1582 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1583
c41f8cbd
SS		 1584 req->handler = zfcp_fsf_close_port_handler;
1585 req->data = erp_action->port;
1586 req->erp_action = erp_action;
1587 req->qtcb->header.port_handle = erp_action->port->handle;
1588 erp_action->fsf_req = req;
c41f8cbd 1589
287ac01a 1590 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1591 retval = zfcp_fsf_req_send(req);
1da177e4 1592 if (retval) {
c41f8cbd 1593 zfcp_fsf_req_free(req);
1da177e4 1594 erp_action->fsf_req = NULL;
1da177e4 1595 }
c41f8cbd 1596out:
564e1c86 1597 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1598 return retval;
1599}
1600
5ab944f9
SS		 1601static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1602{
1603 struct zfcp_wka_port *wka_port = req->data;
1604 struct fsf_qtcb_header *header = &req->qtcb->header;
1605
1606 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1607 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1608 goto out;
1609 }
1610
1611 switch (header->fsf_status) {
1612 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1613 dev_warn(&req->adapter->ccw_device->dev,
1614 "Opening WKA port 0x%x failed\n", wka_port->d_id);
dceab655 1615 /* fall through */
5ab944f9
SS		 1616 case FSF_ADAPTER_STATUS_AVAILABLE:
1617 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
dceab655 1618 /* fall through */
5ab944f9
SS		 1619 case FSF_ACCESS_DENIED:
1620 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1621 break;
5ab944f9
SS		 1622 case FSF_GOOD:
1623 wka_port->handle = header->port_handle;
27f492cc
SS		 1624 /* fall through */
1625 case FSF_PORT_ALREADY_OPEN:
5ab944f9
SS		 1626 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1627 }
1628out:
1629 wake_up(&wka_port->completion_wq);
1630}
1631
1632/**
1633 * zfcp_fsf_open_wka_port - create and send open wka-port request
1634 * @wka_port: pointer to struct zfcp_wka_port
1635 * Returns: 0 on success, error otherwise
1636 */
1637int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1638{
1639 struct qdio_buffer_element *sbale;
564e1c86 1640 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1641 struct zfcp_fsf_req *req;
1642 int retval = -EIO;
1643
564e1c86
SS		 1644 spin_lock_bh(&qdio->req_q_lock);
1645 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1646 goto out;
1647
564e1c86
SS		 1648 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1649 qdio->adapter->pool.erp_req);
09a46c6e 1650
5ab944f9
SS		 1651 if (unlikely(IS_ERR(req))) {
1652 retval = PTR_ERR(req);
1653 goto out;
1654 }
1655
09a46c6e 1656 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1657 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1658 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1659 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1660
1661 req->handler = zfcp_fsf_open_wka_port_handler;
1662 req->qtcb->bottom.support.d_id = wka_port->d_id;
1663 req->data = wka_port;
1664
1665 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1666 retval = zfcp_fsf_req_send(req);
1667 if (retval)
1668 zfcp_fsf_req_free(req);
1669out:
564e1c86 1670 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1671 return retval;
1672}
1673
1674static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1675{
1676 struct zfcp_wka_port *wka_port = req->data;
1677
1678 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1679 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1680 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1681 }
1682
1683 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1684 wake_up(&wka_port->completion_wq);
1685}
1686
1687/**
1688 * zfcp_fsf_close_wka_port - create and send close wka port request
1689 * @erp_action: pointer to struct zfcp_erp_action
1690 * Returns: 0 on success, error otherwise
1691 */
1692int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1693{
1694 struct qdio_buffer_element *sbale;
564e1c86 1695 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1696 struct zfcp_fsf_req *req;
1697 int retval = -EIO;
1698
564e1c86
SS		 1699 spin_lock_bh(&qdio->req_q_lock);
1700 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1701 goto out;
1702
564e1c86
SS		 1703 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1704 qdio->adapter->pool.erp_req);
09a46c6e 1705
5ab944f9
SS		 1706 if (unlikely(IS_ERR(req))) {
1707 retval = PTR_ERR(req);
1708 goto out;
1709 }
1710
09a46c6e 1711 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1712 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1713 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1714 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1715
1716 req->handler = zfcp_fsf_close_wka_port_handler;
1717 req->data = wka_port;
1718 req->qtcb->header.port_handle = wka_port->handle;
1719
1720 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1721 retval = zfcp_fsf_req_send(req);
1722 if (retval)
1723 zfcp_fsf_req_free(req);
1724out:
564e1c86 1725 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1726 return retval;
1727}
1728
c41f8cbd 1729static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1730{
c41f8cbd
SS		 1731 struct zfcp_port *port = req->data;
1732 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1733 struct zfcp_unit *unit;
1da177e4 1734
c41f8cbd 1735 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1736 return;
1da177e4 1737
1da177e4 1738 switch (header->fsf_status) {
1da177e4 1739 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1740 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1741 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1742 break;
1da177e4 1743 case FSF_ACCESS_DENIED:
c41f8cbd 1744 zfcp_fsf_access_denied_port(req, port);
1da177e4 1745 break;
1da177e4 1746 case FSF_PORT_BOXED:
5c815d15
CS		 1747 /* can't use generic zfcp_erp_modify_port_status because
1748 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1749 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1750 list_for_each_entry(unit, &port->unit_list_head, list)
1751 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1752 &unit->status);
dfb3cf00
SS		 1753 zfcp_erp_port_boxed(port, "fscpph2", req);
1754 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1755 ZFCP_STATUS_FSFREQ_RETRY;
1756
1da177e4 1757 break;
1da177e4 1758 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1759 switch (header->fsf_status_qual.word[0]) {
1760 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1761 /* fall through */
1da177e4 1762 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1763 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1764 break;
1da177e4
LT		 1765 }
1766 break;
1da177e4 1767 case FSF_GOOD:
1da177e4
LT		 1768 /* can't use generic zfcp_erp_modify_port_status because
1769 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1770 */
1771 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1772 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1773 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1774 &unit->status);
1da177e4 1775 break;
1da177e4 1776 }
1da177e4
LT		 1777}
1778
c41f8cbd
SS		 1779/**
1780 * zfcp_fsf_close_physical_port - close physical port
1781 * @erp_action: pointer to struct zfcp_erp_action
1782 * Returns: 0 on success
1da177e4 1783 */
c41f8cbd 1784int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1785{
44cc76f2 1786 struct qdio_buffer_element *sbale;
564e1c86 1787 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1788 struct zfcp_fsf_req *req;
1789 int retval = -EIO;
1790
564e1c86
SS		 1791 spin_lock_bh(&qdio->req_q_lock);
1792 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1793 goto out;
1da177e4 1794
564e1c86
SS		 1795 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1796 qdio->adapter->pool.erp_req);
09a46c6e 1797
025270f0 1798 if (IS_ERR(req)) {
c41f8cbd
SS		 1799 retval = PTR_ERR(req);
1800 goto out;
1801 }
1da177e4 1802
09a46c6e 1803 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1804 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 1805 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1806 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1807
c41f8cbd
SS		 1808 req->data = erp_action->port;
1809 req->qtcb->header.port_handle = erp_action->port->handle;
1810 req->erp_action = erp_action;
1811 req->handler = zfcp_fsf_close_physical_port_handler;
1812 erp_action->fsf_req = req;
c41f8cbd 1813
287ac01a 1814 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1815 retval = zfcp_fsf_req_send(req);
1da177e4 1816 if (retval) {
c41f8cbd 1817 zfcp_fsf_req_free(req);
1da177e4 1818 erp_action->fsf_req = NULL;
1da177e4 1819 }
c41f8cbd 1820out:
564e1c86 1821 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1822 return retval;
1823}
1824
c41f8cbd 1825static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1826{
c41f8cbd
SS		 1827 struct zfcp_adapter *adapter = req->adapter;
1828 struct zfcp_unit *unit = req->data;
1829 struct fsf_qtcb_header *header = &req->qtcb->header;
1830 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1831 struct fsf_queue_designator *queue_designator =
1832 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1833 int exclusive, readwrite;
1da177e4 1834
c41f8cbd 1835 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1836 return;
1da177e4 1837
1da177e4 1838 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1839 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1840 ZFCP_STATUS_UNIT_SHARED |
1841 ZFCP_STATUS_UNIT_READONLY,
1842 &unit->status);
1843
1da177e4
LT		 1844 switch (header->fsf_status) {
1845
1846 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1847 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1848 /* fall through */
1da177e4 1849 case FSF_LUN_ALREADY_OPEN:
1da177e4 1850 break;
1da177e4 1851 case FSF_ACCESS_DENIED:
c41f8cbd 1852 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1853 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1854 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1855 break;
1da177e4 1856 case FSF_PORT_BOXED:
5ffd51a5 1857 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1858 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1859 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1860 break;
1da177e4 1861 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1862 if (header->fsf_status_qual.word[0])
553448f6 1863 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1864 "LUN 0x%Lx on port 0x%Lx is already in "
1865 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1866 (unsigned long long)unit->fcp_lun,
1867 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1868 queue_designator->cssid,
1869 queue_designator->hla);
c41f8cbd 1870 else
553448f6
CS		 1871 zfcp_act_eval_err(adapter,
1872 header->fsf_status_qual.word[2]);
5ffd51a5 1873 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1874 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1875 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1876 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1877 break;
1da177e4 1878 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1879 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1880 "No handle is available for LUN "
1881 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1882 (unsigned long long)unit->fcp_lun,
1883 (unsigned long long)unit->port->wwpn);
5ffd51a5 1884 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1885 /* fall through */
1886 case FSF_INVALID_COMMAND_OPTION:
1887 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1888 break;
1da177e4 1889 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1890 switch (header->fsf_status_qual.word[0]) {
1891 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 1892 zfcp_test_link(unit->port);
c41f8cbd 1893 /* fall through */
1da177e4 1894 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1895 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1896 break;
1da177e4
LT		 1897 }
1898 break;
1899
1da177e4 1900 case FSF_GOOD:
1da177e4 1901 unit->handle = header->lun_handle;
1da177e4 1902 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1903
1904 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1905 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
6fcf41d1 1906 !zfcp_ccw_priv_sch(adapter)) {
aef4a983
MS		 1907 exclusive = (bottom->lun_access_info &
1908 FSF_UNIT_ACCESS_EXCLUSIVE);
1909 readwrite = (bottom->lun_access_info &
1910 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1911
1da177e4
LT		 1912 if (!exclusive)
1913 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1914 &unit->status);
1915
1916 if (!readwrite) {
1917 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1918 &unit->status);
c41f8cbd 1919 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1920 "SCSI device at LUN 0x%016Lx on port "
1921 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1922 (unsigned long long)unit->fcp_lun,
1923 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1924 }
1925
1926 if (exclusive && !readwrite) {
c41f8cbd 1927 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1928 "Exclusive read-only access not "
1929 "supported (unit 0x%016Lx, "
1930 "port 0x%016Lx)\n",
7ba58c9c
SS		 1931 (unsigned long long)unit->fcp_lun,
1932 (unsigned long long)unit->port->wwpn);
5ffd51a5 1933 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1934 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1935 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1936 } else if (!exclusive && readwrite) {
c41f8cbd 1937 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1938 "Shared read-write access not "
1939 "supported (unit 0x%016Lx, port "
27c3f0a6 1940 "0x%016Lx)\n",
7ba58c9c
SS		 1941 (unsigned long long)unit->fcp_lun,
1942 (unsigned long long)unit->port->wwpn);
5ffd51a5 1943 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1944 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1945 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1946 }
1947 }
1da177e4 1948 break;
1da177e4 1949 }
1da177e4
LT		 1950}
1951
c41f8cbd
SS		 1952/**
1953 * zfcp_fsf_open_unit - open unit
1954 * @erp_action: pointer to struct zfcp_erp_action
1955 * Returns: 0 on success, error otherwise
1da177e4 1956 */
c41f8cbd 1957int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1958{
44cc76f2 1959 struct qdio_buffer_element *sbale;
c41f8cbd 1960 struct zfcp_adapter *adapter = erp_action->adapter;
564e1c86 1961 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 1962 struct zfcp_fsf_req *req;
1963 int retval = -EIO;
1964
564e1c86
SS		 1965 spin_lock_bh(&qdio->req_q_lock);
1966 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1967 goto out;
1da177e4 1968
564e1c86 1969 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
a4623c46 1970 adapter->pool.erp_req);
09a46c6e 1971
025270f0 1972 if (IS_ERR(req)) {
c41f8cbd
SS		 1973 retval = PTR_ERR(req);
1974 goto out;
1975 }
1976
09a46c6e 1977 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1978 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1979 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1980 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1981
c41f8cbd
SS		 1982 req->qtcb->header.port_handle = erp_action->port->handle;
1983 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
1984 req->handler = zfcp_fsf_open_unit_handler;
1985 req->data = erp_action->unit;
1986 req->erp_action = erp_action;
1987 erp_action->fsf_req = req;
1988
1989 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
1990 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
1991
287ac01a 1992 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1993 retval = zfcp_fsf_req_send(req);
1da177e4 1994 if (retval) {
c41f8cbd 1995 zfcp_fsf_req_free(req);
1da177e4 1996 erp_action->fsf_req = NULL;
1da177e4 1997 }
c41f8cbd 1998out:
564e1c86 1999 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 2000 return retval;
2001}
2002
c41f8cbd 2003static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 2004{
c41f8cbd 2005 struct zfcp_unit *unit = req->data;
1da177e4 2006
c41f8cbd 2007 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 2008 return;
1da177e4 2009
c41f8cbd 2010 switch (req->qtcb->header.fsf_status) {
1da177e4 2011 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2012 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 2013 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2014 break;
1da177e4 2015 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2016 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 2017 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2018 break;
1da177e4 2019 case FSF_PORT_BOXED:
5ffd51a5 2020 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 2021 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2022 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 2023 break;
1da177e4 2024 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 2025 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 2026 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
65a8d4e1 2027 zfcp_test_link(unit->port);
c41f8cbd 2028 /* fall through */
1da177e4 2029 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 2030 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2031 break;
2032 }
2033 break;
1da177e4 2034 case FSF_GOOD:
1da177e4 2035 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2036 break;
1da177e4 2037 }
1da177e4
LT		 2038}
2039
2040/**
c41f8cbd
SS		 2041 * zfcp_fsf_close_unit - close zfcp unit
2042 * @erp_action: pointer to struct zfcp_unit
2043 * Returns: 0 on success, error otherwise
1da177e4 2044 */
c41f8cbd 2045int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2046{
44cc76f2 2047 struct qdio_buffer_element *sbale;
564e1c86 2048 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 2049 struct zfcp_fsf_req *req;
2050 int retval = -EIO;
1da177e4 2051
564e1c86
SS		 2052 spin_lock_bh(&qdio->req_q_lock);
2053 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 2054 goto out;
09a46c6e 2055
564e1c86
SS		 2056 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2057 qdio->adapter->pool.erp_req);
09a46c6e 2058
025270f0 2059 if (IS_ERR(req)) {
c41f8cbd
SS		 2060 retval = PTR_ERR(req);
2061 goto out;
2062 }
1da177e4 2063
09a46c6e 2064 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 2065 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2066 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2067 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2068
c41f8cbd
SS		 2069 req->qtcb->header.port_handle = erp_action->port->handle;
2070 req->qtcb->header.lun_handle = erp_action->unit->handle;
2071 req->handler = zfcp_fsf_close_unit_handler;
2072 req->data = erp_action->unit;
2073 req->erp_action = erp_action;
2074 erp_action->fsf_req = req;
fdf23452 2075
287ac01a 2076 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2077 retval = zfcp_fsf_req_send(req);
2078 if (retval) {
2079 zfcp_fsf_req_free(req);
2080 erp_action->fsf_req = NULL;
2081 }
2082out:
564e1c86 2083 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 2084 return retval;
1da177e4
LT		 2085}
2086
c9615858
CS		 2087static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2088{
2089 lat_rec->sum += lat;
c41f8cbd
SS		 2090 lat_rec->min = min(lat_rec->min, lat);
2091 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2092}
2093
c41f8cbd 2094static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2095{
2096 struct fsf_qual_latency_info *lat_inf;
2097 struct latency_cont *lat;
c41f8cbd 2098 struct zfcp_unit *unit = req->unit;
c9615858 2099
c41f8cbd 2100 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2101
c41f8cbd 2102 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2103 case FSF_DATADIR_READ:
2104 lat = &unit->latencies.read;
2105 break;
2106 case FSF_DATADIR_WRITE:
2107 lat = &unit->latencies.write;
2108 break;
2109 case FSF_DATADIR_CMND:
2110 lat = &unit->latencies.cmd;
2111 break;
2112 default:
2113 return;
2114 }
2115
49f0f01c 2116 spin_lock(&unit->latencies.lock);
c9615858
CS		 2117 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2118 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2119 lat->counter++;
49f0f01c 2120 spin_unlock(&unit->latencies.lock);
1da177e4
LT		 2121}
2122
0997f1c5
SR		 2123#ifdef CONFIG_BLK_DEV_IO_TRACE
2124static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2125{
2126 struct fsf_qual_latency_info *lat_inf;
2127 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2128 struct request *req = scsi_cmnd->request;
2129 struct zfcp_blk_drv_data trace;
2130 int ticks = fsf_req->adapter->timer_ticks;
2131
2132 trace.flags = 0;
2133 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2134 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2135 trace.flags |= ZFCP_BLK_LAT_VALID;
2136 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2137 trace.channel_lat = lat_inf->channel_lat * ticks;
2138 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2139 }
2140 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2141 trace.flags |= ZFCP_BLK_REQ_ERROR;
42428f74
SS		 2142 trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
2143 trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
0997f1c5
SR		 2144
2145 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2146}
2147#else
2148static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2149{
2150}
2151#endif
2152
c41f8cbd 2153static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2154{
0ac55aa9 2155 struct scsi_cmnd *scpnt;
1da177e4 2156 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2157 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2158 u32 sns_len;
f76af7d7 2159 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2160 unsigned long flags;
1da177e4 2161
c41f8cbd
SS		 2162 read_lock_irqsave(&req->adapter->abort_lock, flags);
2163
0ac55aa9
SS		 2164 scpnt = req->data;
2165 if (unlikely(!scpnt)) {
2166 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2167 return;
2168 }
2169
c41f8cbd 2170 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2171 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2172 goto skip_fsfstatus;
2173 }
2174
c41f8cbd 2175 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2176 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2177 goto skip_fsfstatus;
2178 }
2179
feac6a07 2180 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2181
1da177e4 2182 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2183
c41f8cbd
SS		 2184 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2185 zfcp_fsf_req_latency(req);
c9615858 2186
0997f1c5
SR		 2187 zfcp_fsf_trace_latency(req);
2188
1da177e4 2189 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2190 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2191 set_host_byte(scpnt, DID_OK);
c41f8cbd 2192 else {
feac6a07 2193 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2194 goto skip_fsfstatus;
1da177e4
LT		 2195 }
2196 }
2197
1da177e4 2198 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2199 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2200 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2201 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2202 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2203
9d058ecf 2204 memcpy(scpnt->sense_buffer,
1da177e4 2205 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2206 }
2207
1da177e4 2208 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2209 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2210 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2211 scpnt->underflow)
feac6a07 2212 set_host_byte(scpnt, DID_ERROR);
1da177e4 2213 }
c41f8cbd 2214skip_fsfstatus:
8a36e453 2215 if (scpnt->result != 0)
5771710b 2216 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
8a36e453 2217 else if (scpnt->retries > 0)
5771710b 2218 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
8a36e453 2219 else
5771710b 2220 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
1da177e4 2221
1da177e4 2222 scpnt->host_scribble = NULL;
1da177e4 2223 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2224 /*
2225 * We must hold this lock until scsi_done has been called.
2226 * Otherwise we may call scsi_done after abort regarding this
2227 * command has completed.
2228 * Note: scsi_done must not block!
2229 */
c41f8cbd 2230 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2231}
2232
c41f8cbd 2233static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2234{
1da177e4 2235 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2236 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2237 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2238
c41f8cbd
SS		 2239 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2240 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2241 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2242}
2243
2244
2245static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2246{
2247 struct zfcp_unit *unit;
2248 struct fsf_qtcb_header *header = &req->qtcb->header;
2249
2250 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2251 unit = req->data;
2252 else
2253 unit = req->unit;
2254
2255 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2256 goto skip_fsfstatus;
1da177e4 2257
c41f8cbd
SS		 2258 switch (header->fsf_status) {
2259 case FSF_HANDLE_MISMATCH:
2260 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2261 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2262 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2263 break;
2264 case FSF_FCPLUN_NOT_VALID:
2265 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2266 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2267 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2268 break;
c41f8cbd
SS		 2269 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2270 zfcp_fsf_class_not_supp(req);
1da177e4 2271 break;
c41f8cbd
SS		 2272 case FSF_ACCESS_DENIED:
2273 zfcp_fsf_access_denied_unit(req, unit);
2274 break;
2275 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2276 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2277 "Incorrect direction %d, unit 0x%016Lx on port "
2278 "0x%016Lx closed\n",
c41f8cbd 2279 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2280 (unsigned long long)unit->fcp_lun,
2281 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2282 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2283 req);
c41f8cbd
SS		 2284 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2285 break;
2286 case FSF_CMND_LENGTH_NOT_VALID:
2287 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2288 "Incorrect CDB length %d, unit 0x%016Lx on "
2289 "port 0x%016Lx closed\n",
c41f8cbd 2290 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2291 (unsigned long long)unit->fcp_lun,
2292 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2293 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2294 req);
c41f8cbd
SS		 2295 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2296 break;
2297 case FSF_PORT_BOXED:
5ffd51a5 2298 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2299 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2300 ZFCP_STATUS_FSFREQ_RETRY;
2301 break;
2302 case FSF_LUN_BOXED:
5ffd51a5 2303 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2304 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2305 ZFCP_STATUS_FSFREQ_RETRY;
2306 break;
2307 case FSF_ADAPTER_STATUS_AVAILABLE:
2308 if (header->fsf_status_qual.word[0] ==
2309 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
2310 zfcp_test_link(unit->port);
2311 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2312 break;
1da177e4 2313 }
c41f8cbd
SS		 2314skip_fsfstatus:
2315 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2316 zfcp_fsf_send_fcp_ctm_handler(req);
2317 else {
2318 zfcp_fsf_send_fcp_command_task_handler(req);
2319 req->unit = NULL;
2320 zfcp_unit_put(unit);
2321 }
1da177e4
LT		 2322}
2323
7ba58c9c
SS		 2324static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2325{
2326 u32 *fcp_dl_ptr;
2327
2328 /*
2329 * fcp_dl_addr = start address of fcp_cmnd structure +
2330 * size of fixed part + size of dynamically sized add_dcp_cdb field
2331 * SEE FCP-2 documentation
2332 */
2333 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2334 (fcp_cmd->add_fcp_cdb_length << 2));
2335 *fcp_dl_ptr = fcp_dl;
2336}
2337
c41f8cbd
SS		 2338/**
2339 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2340 * @unit: unit where command is sent to
2341 * @scsi_cmnd: scsi command to be sent
1da177e4 2342 */
63caf367
CS		 2343int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2344 struct scsi_cmnd *scsi_cmnd)
1da177e4 2345{
c41f8cbd
SS		 2346 struct zfcp_fsf_req *req;
2347 struct fcp_cmnd_iu *fcp_cmnd_iu;
bc90c863 2348 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
c41f8cbd 2349 int real_bytes, retval = -EIO;
63caf367 2350 struct zfcp_adapter *adapter = unit->port->adapter;
564e1c86 2351 struct zfcp_qdio *qdio = adapter->qdio;
1da177e4 2352
c41f8cbd
SS		 2353 if (unlikely(!(atomic_read(&unit->status) &
2354 ZFCP_STATUS_COMMON_UNBLOCKED)))
2355 return -EBUSY;
1da177e4 2356
564e1c86
SS		 2357 spin_lock(&qdio->req_q_lock);
2358 if (atomic_read(&qdio->req_q.count) <= 0) {
2359 atomic_inc(&qdio->req_q_full);
c41f8cbd 2360 goto out;
8fdf30d5 2361 }
09a46c6e 2362
564e1c86 2363 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
a4623c46 2364 adapter->pool.scsi_req);
09a46c6e 2365
025270f0 2366 if (IS_ERR(req)) {
c41f8cbd
SS		 2367 retval = PTR_ERR(req);
2368 goto out;
2369 }
2370
09a46c6e 2371 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
c41f8cbd
SS		 2372 zfcp_unit_get(unit);
2373 req->unit = unit;
2374 req->data = scsi_cmnd;
2375 req->handler = zfcp_fsf_send_fcp_command_handler;
2376 req->qtcb->header.lun_handle = unit->handle;
2377 req->qtcb->header.port_handle = unit->port->handle;
2378 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2379
2380 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2381
2382 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2383 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2384 /*
2385 * set depending on data direction:
2386 * data direction bits in SBALE (SB Type)
2387 * data direction bits in QTCB
2388 * data direction bits in FCP_CMND IU
2389 */
2390 switch (scsi_cmnd->sc_data_direction) {
2391 case DMA_NONE:
2392 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
1da177e4 2393 break;
c41f8cbd
SS		 2394 case DMA_FROM_DEVICE:
2395 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
c41f8cbd
SS		 2396 fcp_cmnd_iu->rddata = 1;
2397 break;
2398 case DMA_TO_DEVICE:
2399 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2400 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2401 fcp_cmnd_iu->wddata = 1;
1da177e4 2402 break;
c41f8cbd 2403 case DMA_BIDIRECTIONAL:
c41f8cbd 2404 goto failed_scsi_cmnd;
1da177e4
LT		 2405 }
2406
c41f8cbd
SS		 2407 if (likely((scsi_cmnd->device->simple_tags) ||
2408 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2409 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2410 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2411 else
2412 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2413
c41f8cbd
SS		 2414 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2415 fcp_cmnd_iu->add_fcp_cdb_length =
2416 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2417
c41f8cbd 2418 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2419
c41f8cbd 2420 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2421 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2422
564e1c86 2423 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
c41f8cbd
SS		 2424 scsi_sglist(scsi_cmnd),
2425 FSF_MAX_SBALS_PER_REQ);
2426 if (unlikely(real_bytes < 0)) {
42428f74 2427 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
c41f8cbd 2428 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2429 "Oversize data package, unit 0x%016Lx "
2430 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2431 (unsigned long long)unit->fcp_lun,
2432 (unsigned long long)unit->port->wwpn);
5ffd51a5 2433 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2434 retval = -EINVAL;
2435 }
2436 goto failed_scsi_cmnd;
1da177e4 2437 }
1da177e4 2438
c41f8cbd 2439 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2440
c41f8cbd
SS		 2441 retval = zfcp_fsf_req_send(req);
2442 if (unlikely(retval))
2443 goto failed_scsi_cmnd;
1da177e4 2444
c41f8cbd 2445 goto out;
1da177e4 2446
c41f8cbd
SS		 2447failed_scsi_cmnd:
2448 zfcp_unit_put(unit);
2449 zfcp_fsf_req_free(req);
2450 scsi_cmnd->host_scribble = NULL;
2451out:
564e1c86 2452 spin_unlock(&qdio->req_q_lock);
c41f8cbd 2453 return retval;
1da177e4
LT		 2454}
2455
2456/**
c41f8cbd 2457 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2458 * @unit: pointer to struct zfcp_unit
2459 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2460 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2461 */
63caf367 2462struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2463{
44cc76f2 2464 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2465 struct zfcp_fsf_req *req = NULL;
2466 struct fcp_cmnd_iu *fcp_cmnd_iu;
564e1c86 2467 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
1da177e4 2468
c41f8cbd
SS		 2469 if (unlikely(!(atomic_read(&unit->status) &
2470 ZFCP_STATUS_COMMON_UNBLOCKED)))
2471 return NULL;
1da177e4 2472
564e1c86
SS		 2473 spin_lock_bh(&qdio->req_q_lock);
2474 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2475 goto out;
09a46c6e 2476
564e1c86
SS		 2477 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2478 qdio->adapter->pool.scsi_req);
09a46c6e 2479
633528c3
SS		 2480 if (IS_ERR(req)) {
2481 req = NULL;
c41f8cbd 2482 goto out;
633528c3 2483 }
1da177e4 2484
c41f8cbd
SS		 2485 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2486 req->data = unit;
2487 req->handler = zfcp_fsf_send_fcp_command_handler;
2488 req->qtcb->header.lun_handle = unit->handle;
2489 req->qtcb->header.port_handle = unit->port->handle;
2490 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2491 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2492 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2493 sizeof(u32);
c41f8cbd 2494
564e1c86 2495 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 2496 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2497 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2498
c41f8cbd
SS		 2499 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2500 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2501 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2502
c41f8cbd
SS		 2503 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2504 if (!zfcp_fsf_req_send(req))
2505 goto out;
1da177e4 2506
c41f8cbd
SS		 2507 zfcp_fsf_req_free(req);
2508 req = NULL;
2509out:
564e1c86 2510 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 2511 return req;
2512}
1da177e4 2513
c41f8cbd
SS		 2514static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2515{
1da177e4
LT		 2516}
2517
c41f8cbd
SS		 2518/**
2519 * zfcp_fsf_control_file - control file upload/download
2520 * @adapter: pointer to struct zfcp_adapter
2521 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2522 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2523 */
c41f8cbd
SS		 2524struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2525 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2526{
44cc76f2 2527 struct qdio_buffer_element *sbale;
564e1c86 2528 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 2529 struct zfcp_fsf_req *req = NULL;
2530 struct fsf_qtcb_bottom_support *bottom;
2531 int direction, retval = -EIO, bytes;
2532
2533 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2534 return ERR_PTR(-EOPNOTSUPP);
2535
2536 switch (fsf_cfdc->command) {
2537 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2538 direction = SBAL_FLAGS0_TYPE_WRITE;
2539 break;
2540 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2541 direction = SBAL_FLAGS0_TYPE_READ;
2542 break;
2543 default:
2544 return ERR_PTR(-EINVAL);
2545 }
1da177e4 2546
564e1c86
SS		 2547 spin_lock_bh(&qdio->req_q_lock);
2548 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2549 goto out;
1da177e4 2550
564e1c86 2551 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
025270f0 2552 if (IS_ERR(req)) {
c41f8cbd
SS		 2553 retval = -EPERM;
2554 goto out;
2555 }
1da177e4 2556
c41f8cbd 2557 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2558
564e1c86 2559 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2560 sbale[0].flags |= direction;
8a36e453 2561
c41f8cbd
SS		 2562 bottom = &req->qtcb->bottom.support;
2563 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2564 bottom->option = fsf_cfdc->option;
8a36e453 2565
564e1c86
SS		 2566 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2567 direction, fsf_cfdc->sg,
2568 FSF_MAX_SBALS_PER_REQ);
c41f8cbd 2569 if (bytes != ZFCP_CFDC_MAX_SIZE) {
c41f8cbd
SS		 2570 zfcp_fsf_req_free(req);
2571 goto out;
2572 }
1da177e4 2573
c41f8cbd
SS		 2574 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2575 retval = zfcp_fsf_req_send(req);
2576out:
564e1c86 2577 spin_unlock_bh(&qdio->req_q_lock);
8a36e453 2578
c41f8cbd 2579 if (!retval) {
058b8647 2580 wait_for_completion(&req->completion);
c41f8cbd 2581 return req;
1da177e4 2582 }
c41f8cbd 2583 return ERR_PTR(retval);
1da177e4 2584}
bd63eaf4
SS		 2585
2586/**
2587 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2588 * @adapter: pointer to struct zfcp_adapter
2589 * @sbal_idx: response queue index of SBAL to be processed
2590 */
564e1c86 2591void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
bd63eaf4 2592{
564e1c86
SS		 2593 struct zfcp_adapter *adapter = qdio->adapter;
2594 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
bd63eaf4
SS		 2595 struct qdio_buffer_element *sbale;
2596 struct zfcp_fsf_req *fsf_req;
2597 unsigned long flags, req_id;
2598 int idx;
2599
2600 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2601
2602 sbale = &sbal->element[idx];
2603 req_id = (unsigned long) sbale->addr;
2604 spin_lock_irqsave(&adapter->req_list_lock, flags);
2605 fsf_req = zfcp_reqlist_find(adapter, req_id);
2606
2607 if (!fsf_req)
2608 /*
2609 * Unknown request means that we have potentially memory
2610 * corruption and must stop the machine immediately.
2611 */
2612 panic("error: unknown req_id (%lx) on adapter %s.\n",
2613 req_id, dev_name(&adapter->ccw_device->dev));
2614
2615 list_del(&fsf_req->list);
2616 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2617
42428f74
SS		 2618 fsf_req->queue_req.sbal_response = sbal_idx;
2619 fsf_req->queue_req.qdio_inb_usage =
564e1c86 2620 atomic_read(&qdio->resp_q.count);
bd63eaf4
SS		 2621 zfcp_fsf_req_complete(fsf_req);
2622
2623 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2624 break;
2625 }
2626}
Linux kernel - Deliverables
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