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Merge branch 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
[linux-2.6-block.git] / drivers / s390 / scsi / zfcp_fsf.c
CommitLineData
1da177e4 1/*
553448f6 2 * zfcp device driver
1da177e4 3 *
553448f6 4 * Implementation of FSF commands.
1da177e4 5 *
a2fa0aed 6 * Copyright IBM Corporation 2002, 2009
1da177e4
LT		 7 */
8
ecf39d42
CS		 9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
0997f1c5 12#include <linux/blktrace_api.h>
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:
6f53a2d2 895 zfcp_fc_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 1060 sg_resp, max_sbals);
b1a58985 1061 req->qtcb->bottom.support.resp_buf_length = bytes;
c41f8cbd 1062 if (bytes <= 0)
9072df4d 1063 return -EIO;
98fc4d5c 1064
b1a58985
CS		 1065 return 0;
1066}
1067
1068static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req,
1069 struct scatterlist *sg_req,
1070 struct scatterlist *sg_resp,
1071 int max_sbals)
1072{
1073 int ret;
1074
1075 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp, max_sbals);
1076 if (ret)
1077 return ret;
1078
98fc4d5c 1079 /* common settings for ct/gs and els requests */
98fc4d5c
CS		 1080 req->qtcb->bottom.support.service_class = FSF_CLASS_3;
1081 req->qtcb->bottom.support.timeout = 2 * R_A_TOV;
9d38500d 1082 zfcp_fsf_start_timer(req, (2 * R_A_TOV + 10) * HZ);
c41f8cbd
SS		 1083
1084 return 0;
1da177e4
LT		 1085}
1086
1087/**
c41f8cbd
SS		 1088 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1089 * @ct: pointer to struct zfcp_send_ct with data for request
1090 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
1da177e4 1091 */
799b76d0 1092int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
1da177e4 1093{
5ab944f9 1094 struct zfcp_wka_port *wka_port = ct->wka_port;
564e1c86 1095 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
c41f8cbd
SS		 1096 struct zfcp_fsf_req *req;
1097 int ret = -EIO;
1da177e4 1098
564e1c86
SS		 1099 spin_lock_bh(&qdio->req_q_lock);
1100 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1101 goto out;
1da177e4 1102
564e1c86 1103 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool);
09a46c6e 1104
025270f0 1105 if (IS_ERR(req)) {
c41f8cbd
SS		 1106 ret = PTR_ERR(req);
1107 goto out;
3f0ca62a
CS		 1108 }
1109
09a46c6e 1110 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985
CS		 1111 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp,
1112 FSF_MAX_SBALS_PER_REQ);
553448f6 1113 if (ret)
1da177e4 1114 goto failed_send;
1da177e4 1115
c41f8cbd 1116 req->handler = zfcp_fsf_send_ct_handler;
5ab944f9 1117 req->qtcb->header.port_handle = wka_port->handle;
c41f8cbd
SS		 1118 req->data = ct;
1119
5771710b 1120 zfcp_dbf_san_ct_request(req);
1da177e4 1121
c41f8cbd
SS		 1122 ret = zfcp_fsf_req_send(req);
1123 if (ret)
1124 goto failed_send;
1da177e4 1125
c41f8cbd 1126 goto out;
1da177e4 1127
c41f8cbd
SS		 1128failed_send:
1129 zfcp_fsf_req_free(req);
c41f8cbd 1130out:
564e1c86 1131 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1132 return ret;
1da177e4
LT		 1133}
1134
c41f8cbd 1135static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
1da177e4 1136{
c41f8cbd
SS		 1137 struct zfcp_send_els *send_els = req->data;
1138 struct zfcp_port *port = send_els->port;
1139 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1140
c41f8cbd 1141 send_els->status = -EINVAL;
1da177e4 1142
c41f8cbd 1143 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
1da177e4
LT		 1144 goto skip_fsfstatus;
1145
1146 switch (header->fsf_status) {
1da177e4 1147 case FSF_GOOD:
5771710b 1148 zfcp_dbf_san_els_response(req);
c41f8cbd 1149 send_els->status = 0;
1da177e4 1150 break;
1da177e4 1151 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
c41f8cbd 1152 zfcp_fsf_class_not_supp(req);
1da177e4 1153 break;
1da177e4 1154 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1155 switch (header->fsf_status_qual.word[0]){
1156 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
64b29a13 1157 if (port && (send_els->ls_code != ZFCP_LS_ADISC))
6f53a2d2 1158 zfcp_fc_test_link(port);
c41f8cbd 1159 /*fall through */
1da177e4 1160 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1161 case FSF_SQ_RETRY_IF_POSSIBLE:
c41f8cbd 1162 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1163 break;
1da177e4
LT		 1164 }
1165 break;
1da177e4 1166 case FSF_ELS_COMMAND_REJECTED:
1da177e4 1167 case FSF_PAYLOAD_SIZE_MISMATCH:
1da177e4 1168 case FSF_REQUEST_SIZE_TOO_LARGE:
1da177e4 1169 case FSF_RESPONSE_SIZE_TOO_LARGE:
1da177e4 1170 break;
1da177e4 1171 case FSF_ACCESS_DENIED:
dc577d55
CS		 1172 if (port)
1173 zfcp_fsf_access_denied_port(req, port);
1da177e4 1174 break;
c41f8cbd
SS		 1175 case FSF_SBAL_MISMATCH:
1176 /* should never occure, avoided in zfcp_fsf_send_els */
1177 /* fall through */
1da177e4 1178 default:
c41f8cbd 1179 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1180 break;
1181 }
1da177e4 1182skip_fsfstatus:
aa551daf 1183 if (send_els->handler)
1da177e4 1184 send_els->handler(send_els->handler_data);
c41f8cbd 1185}
1da177e4 1186
c41f8cbd
SS		 1187/**
1188 * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1189 * @els: pointer to struct zfcp_send_els with data for the command
1190 */
1191int zfcp_fsf_send_els(struct zfcp_send_els *els)
1192{
1193 struct zfcp_fsf_req *req;
564e1c86 1194 struct zfcp_qdio *qdio = els->adapter->qdio;
c41f8cbd
SS		 1195 int ret = -EIO;
1196
564e1c86
SS		 1197 spin_lock_bh(&qdio->req_q_lock);
1198 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1199 goto out;
09a46c6e 1200
564e1c86 1201 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL);
09a46c6e 1202
025270f0 1203 if (IS_ERR(req)) {
c41f8cbd
SS		 1204 ret = PTR_ERR(req);
1205 goto out;
1206 }
1207
09a46c6e 1208 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
b1a58985 1209 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, 2);
44cc76f2 1210
c41f8cbd
SS		 1211 if (ret)
1212 goto failed_send;
1213
98fc4d5c 1214 req->qtcb->bottom.support.d_id = els->d_id;
c41f8cbd 1215 req->handler = zfcp_fsf_send_els_handler;
c41f8cbd
SS		 1216 req->data = els;
1217
5771710b 1218 zfcp_dbf_san_els_request(req);
c41f8cbd 1219
c41f8cbd
SS		 1220 ret = zfcp_fsf_req_send(req);
1221 if (ret)
1222 goto failed_send;
1223
1224 goto out;
1225
1226failed_send:
1227 zfcp_fsf_req_free(req);
1228out:
564e1c86 1229 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 1230 return ret;
1da177e4
LT		 1231}
1232
c41f8cbd 1233int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
1da177e4 1234{
44cc76f2 1235 struct qdio_buffer_element *sbale;
c41f8cbd 1236 struct zfcp_fsf_req *req;
564e1c86 1237 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1238 int retval = -EIO;
1239
564e1c86
SS		 1240 spin_lock_bh(&qdio->req_q_lock);
1241 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1242 goto out;
09a46c6e 1243
564e1c86
SS		 1244 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA,
1245 qdio->adapter->pool.erp_req);
09a46c6e 1246
025270f0 1247 if (IS_ERR(req)) {
c41f8cbd
SS		 1248 retval = PTR_ERR(req);
1249 goto out;
1da177e4
LT		 1250 }
1251
09a46c6e 1252 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1253 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1254 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1255 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1256
c41f8cbd 1257 req->qtcb->bottom.config.feature_selection =
aef4a983
MS		 1258 FSF_FEATURE_CFDC |
1259 FSF_FEATURE_LUN_SHARING |
9eb69aff 1260 FSF_FEATURE_NOTIFICATION_LOST |
aef4a983 1261 FSF_FEATURE_UPDATE_ALERT;
c41f8cbd
SS		 1262 req->erp_action = erp_action;
1263 req->handler = zfcp_fsf_exchange_config_data_handler;
1264 erp_action->fsf_req = req;
1da177e4 1265
287ac01a 1266 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1267 retval = zfcp_fsf_req_send(req);
1da177e4 1268 if (retval) {
c41f8cbd 1269 zfcp_fsf_req_free(req);
1da177e4 1270 erp_action->fsf_req = NULL;
1da177e4 1271 }
c41f8cbd 1272out:
564e1c86 1273 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1274 return retval;
1275}
1da177e4 1276
564e1c86 1277int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1278 struct fsf_qtcb_bottom_config *data)
52ef11a7 1279{
44cc76f2 1280 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1281 struct zfcp_fsf_req *req = NULL;
1282 int retval = -EIO;
1283
564e1c86
SS		 1284 spin_lock_bh(&qdio->req_q_lock);
1285 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1286 goto out_unlock;
c41f8cbd 1287
564e1c86 1288 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL);
09a46c6e 1289
025270f0 1290 if (IS_ERR(req)) {
c41f8cbd 1291 retval = PTR_ERR(req);
ada81b74 1292 goto out_unlock;
52ef11a7
SS		 1293 }
1294
564e1c86 1295 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1296 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1297 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
c41f8cbd 1298 req->handler = zfcp_fsf_exchange_config_data_handler;
52ef11a7 1299
c41f8cbd 1300 req->qtcb->bottom.config.feature_selection =
52ef11a7
SS		 1301 FSF_FEATURE_CFDC |
1302 FSF_FEATURE_LUN_SHARING |
1303 FSF_FEATURE_NOTIFICATION_LOST |
1304 FSF_FEATURE_UPDATE_ALERT;
1305
1306 if (data)
c41f8cbd 1307 req->data = data;
52ef11a7 1308
c41f8cbd
SS		 1309 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1310 retval = zfcp_fsf_req_send(req);
564e1c86 1311 spin_unlock_bh(&qdio->req_q_lock);
553448f6 1312 if (!retval)
058b8647 1313 wait_for_completion(&req->completion);
52ef11a7 1314
c41f8cbd 1315 zfcp_fsf_req_free(req);
ada81b74 1316 return retval;
52ef11a7 1317
ada81b74 1318out_unlock:
564e1c86 1319 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1320 return retval;
1321}
1322
1da177e4
LT		 1323/**
1324 * zfcp_fsf_exchange_port_data - request information about local port
aef4a983 1325 * @erp_action: ERP action for the adapter for which port data is requested
c41f8cbd 1326 * Returns: 0 on success, error otherwise
1da177e4 1327 */
c41f8cbd 1328int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
1da177e4 1329{
564e1c86 1330 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
44cc76f2 1331 struct qdio_buffer_element *sbale;
c41f8cbd 1332 struct zfcp_fsf_req *req;
c41f8cbd 1333 int retval = -EIO;
1da177e4 1334
564e1c86 1335 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1336 return -EOPNOTSUPP;
1da177e4 1337
564e1c86
SS		 1338 spin_lock_bh(&qdio->req_q_lock);
1339 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 1340 goto out;
09a46c6e 1341
564e1c86
SS		 1342 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA,
1343 qdio->adapter->pool.erp_req);
09a46c6e 1344
025270f0 1345 if (IS_ERR(req)) {
c41f8cbd
SS		 1346 retval = PTR_ERR(req);
1347 goto out;
aef4a983
MS		 1348 }
1349
09a46c6e 1350 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1351 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1352 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1353 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1354
c41f8cbd
SS		 1355 req->handler = zfcp_fsf_exchange_port_data_handler;
1356 req->erp_action = erp_action;
1357 erp_action->fsf_req = req;
52ef11a7 1358
287ac01a 1359 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1360 retval = zfcp_fsf_req_send(req);
1da177e4 1361 if (retval) {
c41f8cbd 1362 zfcp_fsf_req_free(req);
52ef11a7
SS		 1363 erp_action->fsf_req = NULL;
1364 }
c41f8cbd 1365out:
564e1c86 1366 spin_unlock_bh(&qdio->req_q_lock);
52ef11a7
SS		 1367 return retval;
1368}
1369
52ef11a7
SS		 1370/**
1371 * zfcp_fsf_exchange_port_data_sync - request information about local port
564e1c86 1372 * @qdio: pointer to struct zfcp_qdio
c41f8cbd
SS		 1373 * @data: pointer to struct fsf_qtcb_bottom_port
1374 * Returns: 0 on success, error otherwise
52ef11a7 1375 */
564e1c86 1376int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio,
c41f8cbd 1377 struct fsf_qtcb_bottom_port *data)
52ef11a7 1378{
44cc76f2 1379 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 1380 struct zfcp_fsf_req *req = NULL;
1381 int retval = -EIO;
52ef11a7 1382
564e1c86 1383 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
52ef11a7 1384 return -EOPNOTSUPP;
52ef11a7 1385
564e1c86
SS		 1386 spin_lock_bh(&qdio->req_q_lock);
1387 if (zfcp_fsf_req_sbal_get(qdio))
ada81b74 1388 goto out_unlock;
c41f8cbd 1389
564e1c86 1390 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL);
09a46c6e 1391
025270f0 1392 if (IS_ERR(req)) {
c41f8cbd 1393 retval = PTR_ERR(req);
ada81b74 1394 goto out_unlock;
1da177e4
LT		 1395 }
1396
52ef11a7 1397 if (data)
c41f8cbd 1398 req->data = data;
52ef11a7 1399
564e1c86 1400 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
52ef11a7
SS		 1401 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1402 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1403
c41f8cbd
SS		 1404 req->handler = zfcp_fsf_exchange_port_data_handler;
1405 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1406 retval = zfcp_fsf_req_send(req);
564e1c86 1407 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1408
553448f6 1409 if (!retval)
058b8647
SS		 1410 wait_for_completion(&req->completion);
1411
c41f8cbd 1412 zfcp_fsf_req_free(req);
1da177e4 1413
1da177e4 1414 return retval;
ada81b74
CS		 1415
1416out_unlock:
564e1c86 1417 spin_unlock_bh(&qdio->req_q_lock);
ada81b74 1418 return retval;
1da177e4
LT		 1419}
1420
c41f8cbd 1421static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
1da177e4 1422{
c41f8cbd
SS		 1423 struct zfcp_port *port = req->data;
1424 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1425 struct fsf_plogi *plogi;
1da177e4 1426
c41f8cbd 1427 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a17c5855 1428 goto out;
1da177e4 1429
1da177e4 1430 switch (header->fsf_status) {
1da177e4 1431 case FSF_PORT_ALREADY_OPEN:
1da177e4 1432 break;
1da177e4 1433 case FSF_ACCESS_DENIED:
c41f8cbd 1434 zfcp_fsf_access_denied_port(req, port);
1da177e4 1435 break;
1da177e4 1436 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
c41f8cbd 1437 dev_warn(&req->adapter->ccw_device->dev,
ff3b24fa 1438 "Not enough FCP adapter resources to open "
7ba58c9c
SS		 1439 "remote port 0x%016Lx\n",
1440 (unsigned long long)port->wwpn);
5ffd51a5 1441 zfcp_erp_port_failed(port, "fsoph_1", req);
c41f8cbd 1442 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1443 break;
1da177e4 1444 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1445 switch (header->fsf_status_qual.word[0]) {
1446 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1da177e4 1447 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1da177e4 1448 case FSF_SQ_NO_RETRY_POSSIBLE:
c41f8cbd 1449 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1450 break;
1451 }
1452 break;
1da177e4 1453 case FSF_GOOD:
1da177e4 1454 port->handle = header->port_handle;
1da177e4
LT		 1455 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
1456 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
d736a27b
AH		 1457 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
1458 ZFCP_STATUS_COMMON_ACCESS_BOXED,
1459 &port->status);
1da177e4
LT		 1460 /* check whether D_ID has changed during open */
1461 /*
1462 * FIXME: This check is not airtight, as the FCP channel does
1463 * not monitor closures of target port connections caused on
1464 * the remote side. Thus, they might miss out on invalidating
1465 * locally cached WWPNs (and other N_Port parameters) of gone
1466 * target ports. So, our heroic attempt to make things safe
1467 * could be undermined by 'open port' response data tagged with
1468 * obsolete WWPNs. Another reason to monitor potential
1469 * connection closures ourself at least (by interpreting
1470 * incoming ELS' and unsolicited status). It just crosses my
1471 * mind that one should be able to cross-check by means of
1472 * another GID_PN straight after a port has been opened.
1473 * Alternately, an ADISC/PDISC ELS should suffice, as well.
1474 */
c41f8cbd 1475 plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
39eb7e9a
CS		 1476 if (req->qtcb->bottom.support.els1_length >=
1477 FSF_PLOGI_MIN_LEN) {
10d00f78 1478 if (plogi->serv_param.wwpn != port->wwpn) {
b98478d7 1479 port->d_id = 0;
10d00f78
CS		 1480 dev_warn(&port->adapter->ccw_device->dev,
1481 "A port opened with WWPN 0x%016Lx "
1482 "returned data that identifies it as "
1483 "WWPN 0x%016Lx\n",
1484 (unsigned long long) port->wwpn,
1485 (unsigned long long)
1486 plogi->serv_param.wwpn);
1487 } else {
c41f8cbd
SS		 1488 port->wwnn = plogi->serv_param.wwnn;
1489 zfcp_fc_plogi_evaluate(port, plogi);
1da177e4
LT		 1490 }
1491 }
1492 break;
1da177e4 1493 case FSF_UNKNOWN_OP_SUBTYPE:
c41f8cbd 1494 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 1495 break;
1496 }
a17c5855
MP		 1497
1498out:
1499 zfcp_port_put(port);
1da177e4
LT		 1500}
1501
c41f8cbd
SS		 1502/**
1503 * zfcp_fsf_open_port - create and send open port request
1504 * @erp_action: pointer to struct zfcp_erp_action
1505 * Returns: 0 on success, error otherwise
1da177e4 1506 */
c41f8cbd 1507int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
1da177e4 1508{
44cc76f2 1509 struct qdio_buffer_element *sbale;
564e1c86 1510 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
a17c5855 1511 struct zfcp_port *port = erp_action->port;
564e1c86 1512 struct zfcp_fsf_req *req;
c41f8cbd
SS		 1513 int retval = -EIO;
1514
564e1c86
SS		 1515 spin_lock_bh(&qdio->req_q_lock);
1516 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1517 goto out;
1518
564e1c86
SS		 1519 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1520 qdio->adapter->pool.erp_req);
09a46c6e 1521
025270f0 1522 if (IS_ERR(req)) {
c41f8cbd 1523 retval = PTR_ERR(req);
1da177e4 1524 goto out;
c41f8cbd 1525 }
1da177e4 1526
09a46c6e 1527 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1528 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1529 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1530 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1531
c41f8cbd 1532 req->handler = zfcp_fsf_open_port_handler;
a17c5855
MP		 1533 req->qtcb->bottom.support.d_id = port->d_id;
1534 req->data = port;
c41f8cbd
SS		 1535 req->erp_action = erp_action;
1536 erp_action->fsf_req = req;
a17c5855 1537 zfcp_port_get(port);
c41f8cbd 1538
287ac01a 1539 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1540 retval = zfcp_fsf_req_send(req);
1da177e4 1541 if (retval) {
c41f8cbd 1542 zfcp_fsf_req_free(req);
1da177e4 1543 erp_action->fsf_req = NULL;
a17c5855 1544 zfcp_port_put(port);
1da177e4 1545 }
c41f8cbd 1546out:
564e1c86 1547 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1548 return retval;
1549}
1550
c41f8cbd 1551static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
1da177e4 1552{
c41f8cbd 1553 struct zfcp_port *port = req->data;
1da177e4 1554
c41f8cbd 1555 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1556 return;
1da177e4 1557
c41f8cbd 1558 switch (req->qtcb->header.fsf_status) {
1da177e4 1559 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1560 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1", req);
c41f8cbd 1561 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1562 break;
1da177e4 1563 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4 1564 break;
1da177e4 1565 case FSF_GOOD:
5ffd51a5 1566 zfcp_erp_modify_port_status(port, "fscph_2", req,
1da177e4
LT		 1567 ZFCP_STATUS_COMMON_OPEN,
1568 ZFCP_CLEAR);
1da177e4 1569 break;
1da177e4 1570 }
1da177e4
LT		 1571}
1572
c41f8cbd
SS		 1573/**
1574 * zfcp_fsf_close_port - create and send close port request
1575 * @erp_action: pointer to struct zfcp_erp_action
1576 * Returns: 0 on success, error otherwise
1da177e4 1577 */
c41f8cbd 1578int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
1da177e4 1579{
44cc76f2 1580 struct qdio_buffer_element *sbale;
564e1c86 1581 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1582 struct zfcp_fsf_req *req;
1583 int retval = -EIO;
1584
564e1c86
SS		 1585 spin_lock_bh(&qdio->req_q_lock);
1586 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd
SS		 1587 goto out;
1588
564e1c86
SS		 1589 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1590 qdio->adapter->pool.erp_req);
09a46c6e 1591
025270f0 1592 if (IS_ERR(req)) {
c41f8cbd 1593 retval = PTR_ERR(req);
1da177e4 1594 goto out;
c41f8cbd 1595 }
1da177e4 1596
09a46c6e 1597 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1598 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1599 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1600 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1601
c41f8cbd
SS		 1602 req->handler = zfcp_fsf_close_port_handler;
1603 req->data = erp_action->port;
1604 req->erp_action = erp_action;
1605 req->qtcb->header.port_handle = erp_action->port->handle;
1606 erp_action->fsf_req = req;
c41f8cbd 1607
287ac01a 1608 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1609 retval = zfcp_fsf_req_send(req);
1da177e4 1610 if (retval) {
c41f8cbd 1611 zfcp_fsf_req_free(req);
1da177e4 1612 erp_action->fsf_req = NULL;
1da177e4 1613 }
c41f8cbd 1614out:
564e1c86 1615 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1616 return retval;
1617}
1618
5ab944f9
SS		 1619static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req)
1620{
1621 struct zfcp_wka_port *wka_port = req->data;
1622 struct fsf_qtcb_header *header = &req->qtcb->header;
1623
1624 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1625 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1626 goto out;
1627 }
1628
1629 switch (header->fsf_status) {
1630 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
1631 dev_warn(&req->adapter->ccw_device->dev,
1632 "Opening WKA port 0x%x failed\n", wka_port->d_id);
dceab655 1633 /* fall through */
5ab944f9
SS		 1634 case FSF_ADAPTER_STATUS_AVAILABLE:
1635 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
dceab655 1636 /* fall through */
5ab944f9
SS		 1637 case FSF_ACCESS_DENIED:
1638 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1639 break;
5ab944f9
SS		 1640 case FSF_GOOD:
1641 wka_port->handle = header->port_handle;
27f492cc
SS		 1642 /* fall through */
1643 case FSF_PORT_ALREADY_OPEN:
5ab944f9
SS		 1644 wka_port->status = ZFCP_WKA_PORT_ONLINE;
1645 }
1646out:
1647 wake_up(&wka_port->completion_wq);
1648}
1649
1650/**
1651 * zfcp_fsf_open_wka_port - create and send open wka-port request
1652 * @wka_port: pointer to struct zfcp_wka_port
1653 * Returns: 0 on success, error otherwise
1654 */
1655int zfcp_fsf_open_wka_port(struct zfcp_wka_port *wka_port)
1656{
1657 struct qdio_buffer_element *sbale;
564e1c86 1658 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1659 struct zfcp_fsf_req *req;
1660 int retval = -EIO;
1661
564e1c86
SS		 1662 spin_lock_bh(&qdio->req_q_lock);
1663 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1664 goto out;
1665
564e1c86
SS		 1666 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID,
1667 qdio->adapter->pool.erp_req);
09a46c6e 1668
5ab944f9
SS		 1669 if (unlikely(IS_ERR(req))) {
1670 retval = PTR_ERR(req);
1671 goto out;
1672 }
1673
09a46c6e 1674 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1675 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1676 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1677 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1678
1679 req->handler = zfcp_fsf_open_wka_port_handler;
1680 req->qtcb->bottom.support.d_id = wka_port->d_id;
1681 req->data = wka_port;
1682
1683 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1684 retval = zfcp_fsf_req_send(req);
1685 if (retval)
1686 zfcp_fsf_req_free(req);
1687out:
564e1c86 1688 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1689 return retval;
1690}
1691
1692static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req)
1693{
1694 struct zfcp_wka_port *wka_port = req->data;
1695
1696 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) {
1697 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1698 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1", req);
5ab944f9
SS		 1699 }
1700
1701 wka_port->status = ZFCP_WKA_PORT_OFFLINE;
1702 wake_up(&wka_port->completion_wq);
1703}
1704
1705/**
1706 * zfcp_fsf_close_wka_port - create and send close wka port request
1707 * @erp_action: pointer to struct zfcp_erp_action
1708 * Returns: 0 on success, error otherwise
1709 */
1710int zfcp_fsf_close_wka_port(struct zfcp_wka_port *wka_port)
1711{
1712 struct qdio_buffer_element *sbale;
564e1c86 1713 struct zfcp_qdio *qdio = wka_port->adapter->qdio;
5ab944f9
SS		 1714 struct zfcp_fsf_req *req;
1715 int retval = -EIO;
1716
564e1c86
SS		 1717 spin_lock_bh(&qdio->req_q_lock);
1718 if (zfcp_fsf_req_sbal_get(qdio))
5ab944f9
SS		 1719 goto out;
1720
564e1c86
SS		 1721 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT,
1722 qdio->adapter->pool.erp_req);
09a46c6e 1723
5ab944f9
SS		 1724 if (unlikely(IS_ERR(req))) {
1725 retval = PTR_ERR(req);
1726 goto out;
1727 }
1728
09a46c6e 1729 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1730 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
5ab944f9
SS		 1731 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1732 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1733
1734 req->handler = zfcp_fsf_close_wka_port_handler;
1735 req->data = wka_port;
1736 req->qtcb->header.port_handle = wka_port->handle;
1737
1738 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
1739 retval = zfcp_fsf_req_send(req);
1740 if (retval)
1741 zfcp_fsf_req_free(req);
1742out:
564e1c86 1743 spin_unlock_bh(&qdio->req_q_lock);
5ab944f9
SS		 1744 return retval;
1745}
1746
c41f8cbd 1747static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
1da177e4 1748{
c41f8cbd
SS		 1749 struct zfcp_port *port = req->data;
1750 struct fsf_qtcb_header *header = &req->qtcb->header;
1da177e4 1751 struct zfcp_unit *unit;
1da177e4 1752
c41f8cbd 1753 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
a5b11dda 1754 return;
1da177e4 1755
1da177e4 1756 switch (header->fsf_status) {
1da177e4 1757 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1758 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1", req);
c41f8cbd 1759 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1760 break;
1da177e4 1761 case FSF_ACCESS_DENIED:
c41f8cbd 1762 zfcp_fsf_access_denied_port(req, port);
1da177e4 1763 break;
1da177e4 1764 case FSF_PORT_BOXED:
5c815d15
CS		 1765 /* can't use generic zfcp_erp_modify_port_status because
1766 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
1767 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1768 list_for_each_entry(unit, &port->unit_list_head, list)
1769 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1770 &unit->status);
dfb3cf00
SS		 1771 zfcp_erp_port_boxed(port, "fscpph2", req);
1772 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1773 ZFCP_STATUS_FSFREQ_RETRY;
1774
1da177e4 1775 break;
1da177e4 1776 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1777 switch (header->fsf_status_qual.word[0]) {
1778 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
c41f8cbd 1779 /* fall through */
1da177e4 1780 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1781 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1782 break;
1da177e4
LT		 1783 }
1784 break;
1da177e4 1785 case FSF_GOOD:
1da177e4
LT		 1786 /* can't use generic zfcp_erp_modify_port_status because
1787 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
1788 */
1789 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
1790 list_for_each_entry(unit, &port->unit_list_head, list)
c41f8cbd
SS		 1791 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
1792 &unit->status);
1da177e4 1793 break;
1da177e4 1794 }
1da177e4
LT		 1795}
1796
c41f8cbd
SS		 1797/**
1798 * zfcp_fsf_close_physical_port - close physical port
1799 * @erp_action: pointer to struct zfcp_erp_action
1800 * Returns: 0 on success
1da177e4 1801 */
c41f8cbd 1802int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
1da177e4 1803{
44cc76f2 1804 struct qdio_buffer_element *sbale;
564e1c86 1805 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 1806 struct zfcp_fsf_req *req;
1807 int retval = -EIO;
1808
564e1c86
SS		 1809 spin_lock_bh(&qdio->req_q_lock);
1810 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1811 goto out;
1da177e4 1812
564e1c86
SS		 1813 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT,
1814 qdio->adapter->pool.erp_req);
09a46c6e 1815
025270f0 1816 if (IS_ERR(req)) {
c41f8cbd
SS		 1817 retval = PTR_ERR(req);
1818 goto out;
1819 }
1da177e4 1820
09a46c6e 1821 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1822 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 1823 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1824 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 1825
c41f8cbd
SS		 1826 req->data = erp_action->port;
1827 req->qtcb->header.port_handle = erp_action->port->handle;
1828 req->erp_action = erp_action;
1829 req->handler = zfcp_fsf_close_physical_port_handler;
1830 erp_action->fsf_req = req;
c41f8cbd 1831
287ac01a 1832 zfcp_fsf_start_erp_timer(req);
c41f8cbd 1833 retval = zfcp_fsf_req_send(req);
1da177e4 1834 if (retval) {
c41f8cbd 1835 zfcp_fsf_req_free(req);
1da177e4 1836 erp_action->fsf_req = NULL;
1da177e4 1837 }
c41f8cbd 1838out:
564e1c86 1839 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 1840 return retval;
1841}
1842
c41f8cbd 1843static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
1da177e4 1844{
c41f8cbd
SS		 1845 struct zfcp_adapter *adapter = req->adapter;
1846 struct zfcp_unit *unit = req->data;
1847 struct fsf_qtcb_header *header = &req->qtcb->header;
1848 struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
1849 struct fsf_queue_designator *queue_designator =
1850 &header->fsf_status_qual.fsf_queue_designator;
aef4a983 1851 int exclusive, readwrite;
1da177e4 1852
c41f8cbd 1853 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 1854 return;
1da177e4 1855
1da177e4 1856 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
b64ddf96 1857 ZFCP_STATUS_COMMON_ACCESS_BOXED |
1da177e4
LT		 1858 ZFCP_STATUS_UNIT_SHARED |
1859 ZFCP_STATUS_UNIT_READONLY,
1860 &unit->status);
1861
1da177e4
LT		 1862 switch (header->fsf_status) {
1863
1864 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 1865 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fsouh_1", req);
c41f8cbd 1866 /* fall through */
1da177e4 1867 case FSF_LUN_ALREADY_OPEN:
1da177e4 1868 break;
1da177e4 1869 case FSF_ACCESS_DENIED:
c41f8cbd 1870 zfcp_fsf_access_denied_unit(req, unit);
1da177e4 1871 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
553448f6 1872 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
1da177e4 1873 break;
1da177e4 1874 case FSF_PORT_BOXED:
5ffd51a5 1875 zfcp_erp_port_boxed(unit->port, "fsouh_2", req);
c41f8cbd
SS		 1876 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1877 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 1878 break;
1da177e4 1879 case FSF_LUN_SHARING_VIOLATION:
c41f8cbd 1880 if (header->fsf_status_qual.word[0])
553448f6 1881 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1882 "LUN 0x%Lx on port 0x%Lx is already in "
1883 "use by CSS%d, MIF Image ID %x\n",
7ba58c9c
SS		 1884 (unsigned long long)unit->fcp_lun,
1885 (unsigned long long)unit->port->wwpn,
ff3b24fa
CS		 1886 queue_designator->cssid,
1887 queue_designator->hla);
c41f8cbd 1888 else
553448f6
CS		 1889 zfcp_act_eval_err(adapter,
1890 header->fsf_status_qual.word[2]);
5ffd51a5 1891 zfcp_erp_unit_access_denied(unit, "fsouh_3", req);
1da177e4
LT		 1892 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
1893 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
c41f8cbd 1894 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1895 break;
1da177e4 1896 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
c41f8cbd 1897 dev_warn(&adapter->ccw_device->dev,
ff3b24fa
CS		 1898 "No handle is available for LUN "
1899 "0x%016Lx on port 0x%016Lx\n",
7ba58c9c
SS		 1900 (unsigned long long)unit->fcp_lun,
1901 (unsigned long long)unit->port->wwpn);
5ffd51a5 1902 zfcp_erp_unit_failed(unit, "fsouh_4", req);
c41f8cbd
SS		 1903 /* fall through */
1904 case FSF_INVALID_COMMAND_OPTION:
1905 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1906 break;
1da177e4 1907 case FSF_ADAPTER_STATUS_AVAILABLE:
1da177e4
LT		 1908 switch (header->fsf_status_qual.word[0]) {
1909 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 1910 zfcp_fc_test_link(unit->port);
c41f8cbd 1911 /* fall through */
1da177e4 1912 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 1913 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 1914 break;
1da177e4
LT		 1915 }
1916 break;
1917
1da177e4 1918 case FSF_GOOD:
1da177e4 1919 unit->handle = header->lun_handle;
1da177e4 1920 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
aef4a983
MS		 1921
1922 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
1923 (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) &&
6fcf41d1 1924 !zfcp_ccw_priv_sch(adapter)) {
aef4a983
MS		 1925 exclusive = (bottom->lun_access_info &
1926 FSF_UNIT_ACCESS_EXCLUSIVE);
1927 readwrite = (bottom->lun_access_info &
1928 FSF_UNIT_ACCESS_OUTBOUND_TRANSFER);
1929
1da177e4
LT		 1930 if (!exclusive)
1931 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
1932 &unit->status);
1933
1934 if (!readwrite) {
1935 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
1936 &unit->status);
c41f8cbd 1937 dev_info(&adapter->ccw_device->dev,
ff3b24fa
CS		 1938 "SCSI device at LUN 0x%016Lx on port "
1939 "0x%016Lx opened read-only\n",
7ba58c9c
SS		 1940 (unsigned long long)unit->fcp_lun,
1941 (unsigned long long)unit->port->wwpn);
1da177e4
LT		 1942 }
1943
1944 if (exclusive && !readwrite) {
c41f8cbd 1945 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1946 "Exclusive read-only access not "
1947 "supported (unit 0x%016Lx, "
1948 "port 0x%016Lx)\n",
7ba58c9c
SS		 1949 (unsigned long long)unit->fcp_lun,
1950 (unsigned long long)unit->port->wwpn);
5ffd51a5 1951 zfcp_erp_unit_failed(unit, "fsouh_5", req);
c41f8cbd 1952 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1953 zfcp_erp_unit_shutdown(unit, 0, "fsouh_6", req);
1da177e4 1954 } else if (!exclusive && readwrite) {
c41f8cbd 1955 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 1956 "Shared read-write access not "
1957 "supported (unit 0x%016Lx, port "
27c3f0a6 1958 "0x%016Lx)\n",
7ba58c9c
SS		 1959 (unsigned long long)unit->fcp_lun,
1960 (unsigned long long)unit->port->wwpn);
5ffd51a5 1961 zfcp_erp_unit_failed(unit, "fsouh_7", req);
c41f8cbd 1962 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
5ffd51a5 1963 zfcp_erp_unit_shutdown(unit, 0, "fsouh_8", req);
1da177e4
LT		 1964 }
1965 }
1da177e4 1966 break;
1da177e4 1967 }
1da177e4
LT		 1968}
1969
c41f8cbd
SS		 1970/**
1971 * zfcp_fsf_open_unit - open unit
1972 * @erp_action: pointer to struct zfcp_erp_action
1973 * Returns: 0 on success, error otherwise
1da177e4 1974 */
c41f8cbd 1975int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
1da177e4 1976{
44cc76f2 1977 struct qdio_buffer_element *sbale;
c41f8cbd 1978 struct zfcp_adapter *adapter = erp_action->adapter;
564e1c86 1979 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 1980 struct zfcp_fsf_req *req;
1981 int retval = -EIO;
1982
564e1c86
SS		 1983 spin_lock_bh(&qdio->req_q_lock);
1984 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 1985 goto out;
1da177e4 1986
564e1c86 1987 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN,
a4623c46 1988 adapter->pool.erp_req);
09a46c6e 1989
025270f0 1990 if (IS_ERR(req)) {
c41f8cbd
SS		 1991 retval = PTR_ERR(req);
1992 goto out;
1993 }
1994
09a46c6e 1995 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 1996 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
1da177e4
LT		 1997 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1998 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1999
c41f8cbd
SS		 2000 req->qtcb->header.port_handle = erp_action->port->handle;
2001 req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
2002 req->handler = zfcp_fsf_open_unit_handler;
2003 req->data = erp_action->unit;
2004 req->erp_action = erp_action;
2005 erp_action->fsf_req = req;
2006
2007 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
2008 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
2009
287ac01a 2010 zfcp_fsf_start_erp_timer(req);
c41f8cbd 2011 retval = zfcp_fsf_req_send(req);
1da177e4 2012 if (retval) {
c41f8cbd 2013 zfcp_fsf_req_free(req);
1da177e4 2014 erp_action->fsf_req = NULL;
1da177e4 2015 }
c41f8cbd 2016out:
564e1c86 2017 spin_unlock_bh(&qdio->req_q_lock);
1da177e4
LT		 2018 return retval;
2019}
2020
c41f8cbd 2021static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
1da177e4 2022{
c41f8cbd 2023 struct zfcp_unit *unit = req->data;
1da177e4 2024
c41f8cbd 2025 if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
44cc76f2 2026 return;
1da177e4 2027
c41f8cbd 2028 switch (req->qtcb->header.fsf_status) {
1da177e4 2029 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2030 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fscuh_1", req);
c41f8cbd 2031 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2032 break;
1da177e4 2033 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2034 zfcp_erp_port_reopen(unit->port, 0, "fscuh_2", req);
c41f8cbd 2035 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2036 break;
1da177e4 2037 case FSF_PORT_BOXED:
5ffd51a5 2038 zfcp_erp_port_boxed(unit->port, "fscuh_3", req);
c41f8cbd
SS		 2039 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2040 ZFCP_STATUS_FSFREQ_RETRY;
1da177e4 2041 break;
1da177e4 2042 case FSF_ADAPTER_STATUS_AVAILABLE:
c41f8cbd 2043 switch (req->qtcb->header.fsf_status_qual.word[0]) {
1da177e4 2044 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
6f53a2d2 2045 zfcp_fc_test_link(unit->port);
c41f8cbd 2046 /* fall through */
1da177e4 2047 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
c41f8cbd 2048 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4
LT		 2049 break;
2050 }
2051 break;
1da177e4 2052 case FSF_GOOD:
1da177e4 2053 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
1da177e4 2054 break;
1da177e4 2055 }
1da177e4
LT		 2056}
2057
2058/**
c41f8cbd
SS		 2059 * zfcp_fsf_close_unit - close zfcp unit
2060 * @erp_action: pointer to struct zfcp_unit
2061 * Returns: 0 on success, error otherwise
1da177e4 2062 */
c41f8cbd 2063int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
1da177e4 2064{
44cc76f2 2065 struct qdio_buffer_element *sbale;
564e1c86 2066 struct zfcp_qdio *qdio = erp_action->adapter->qdio;
c41f8cbd
SS		 2067 struct zfcp_fsf_req *req;
2068 int retval = -EIO;
1da177e4 2069
564e1c86
SS		 2070 spin_lock_bh(&qdio->req_q_lock);
2071 if (zfcp_fsf_req_sbal_get(qdio))
1da177e4 2072 goto out;
09a46c6e 2073
564e1c86
SS		 2074 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN,
2075 qdio->adapter->pool.erp_req);
09a46c6e 2076
025270f0 2077 if (IS_ERR(req)) {
c41f8cbd
SS		 2078 retval = PTR_ERR(req);
2079 goto out;
2080 }
1da177e4 2081
09a46c6e 2082 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
564e1c86 2083 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2084 sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1da177e4
LT		 2085 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2086
c41f8cbd
SS		 2087 req->qtcb->header.port_handle = erp_action->port->handle;
2088 req->qtcb->header.lun_handle = erp_action->unit->handle;
2089 req->handler = zfcp_fsf_close_unit_handler;
2090 req->data = erp_action->unit;
2091 req->erp_action = erp_action;
2092 erp_action->fsf_req = req;
fdf23452 2093
287ac01a 2094 zfcp_fsf_start_erp_timer(req);
c41f8cbd
SS		 2095 retval = zfcp_fsf_req_send(req);
2096 if (retval) {
2097 zfcp_fsf_req_free(req);
2098 erp_action->fsf_req = NULL;
2099 }
2100out:
564e1c86 2101 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd 2102 return retval;
1da177e4
LT		 2103}
2104
c9615858
CS		 2105static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
2106{
2107 lat_rec->sum += lat;
c41f8cbd
SS		 2108 lat_rec->min = min(lat_rec->min, lat);
2109 lat_rec->max = max(lat_rec->max, lat);
c9615858
CS		 2110}
2111
c41f8cbd 2112static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
c9615858
CS		 2113{
2114 struct fsf_qual_latency_info *lat_inf;
2115 struct latency_cont *lat;
c41f8cbd 2116 struct zfcp_unit *unit = req->unit;
c9615858 2117
c41f8cbd 2118 lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
c9615858 2119
c41f8cbd 2120 switch (req->qtcb->bottom.io.data_direction) {
c9615858
CS		 2121 case FSF_DATADIR_READ:
2122 lat = &unit->latencies.read;
2123 break;
2124 case FSF_DATADIR_WRITE:
2125 lat = &unit->latencies.write;
2126 break;
2127 case FSF_DATADIR_CMND:
2128 lat = &unit->latencies.cmd;
2129 break;
2130 default:
2131 return;
2132 }
2133
49f0f01c 2134 spin_lock(&unit->latencies.lock);
c9615858
CS		 2135 zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
2136 zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
2137 lat->counter++;
49f0f01c 2138 spin_unlock(&unit->latencies.lock);
1da177e4
LT		 2139}
2140
0997f1c5
SR		 2141#ifdef CONFIG_BLK_DEV_IO_TRACE
2142static void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2143{
2144 struct fsf_qual_latency_info *lat_inf;
2145 struct scsi_cmnd *scsi_cmnd = (struct scsi_cmnd *)fsf_req->data;
2146 struct request *req = scsi_cmnd->request;
2147 struct zfcp_blk_drv_data trace;
2148 int ticks = fsf_req->adapter->timer_ticks;
2149
2150 trace.flags = 0;
2151 trace.magic = ZFCP_BLK_DRV_DATA_MAGIC;
2152 if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) {
2153 trace.flags |= ZFCP_BLK_LAT_VALID;
2154 lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
2155 trace.channel_lat = lat_inf->channel_lat * ticks;
2156 trace.fabric_lat = lat_inf->fabric_lat * ticks;
2157 }
2158 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2159 trace.flags |= ZFCP_BLK_REQ_ERROR;
42428f74
SS		 2160 trace.inb_usage = fsf_req->queue_req.qdio_inb_usage;
2161 trace.outb_usage = fsf_req->queue_req.qdio_outb_usage;
0997f1c5
SR		 2162
2163 blk_add_driver_data(req->q, req, &trace, sizeof(trace));
2164}
2165#else
2166static inline void zfcp_fsf_trace_latency(struct zfcp_fsf_req *fsf_req)
2167{
2168}
2169#endif
2170
c41f8cbd 2171static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
1da177e4 2172{
0ac55aa9 2173 struct scsi_cmnd *scpnt;
1da177e4 2174 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2175 &(req->qtcb->bottom.io.fcp_rsp);
1da177e4 2176 u32 sns_len;
f76af7d7 2177 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2178 unsigned long flags;
1da177e4 2179
c41f8cbd
SS		 2180 read_lock_irqsave(&req->adapter->abort_lock, flags);
2181
0ac55aa9
SS		 2182 scpnt = req->data;
2183 if (unlikely(!scpnt)) {
2184 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
2185 return;
2186 }
2187
c41f8cbd 2188 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
feac6a07 2189 set_host_byte(scpnt, DID_SOFT_ERROR);
1da177e4
LT		 2190 goto skip_fsfstatus;
2191 }
2192
c41f8cbd 2193 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
feac6a07 2194 set_host_byte(scpnt, DID_ERROR);
1da177e4
LT		 2195 goto skip_fsfstatus;
2196 }
2197
feac6a07 2198 set_msg_byte(scpnt, COMMAND_COMPLETE);
1da177e4 2199
1da177e4 2200 scpnt->result |= fcp_rsp_iu->scsi_status;
1da177e4 2201
c41f8cbd
SS		 2202 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
2203 zfcp_fsf_req_latency(req);
c9615858 2204
0997f1c5
SR		 2205 zfcp_fsf_trace_latency(req);
2206
1da177e4 2207 if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
c41f8cbd 2208 if (fcp_rsp_info[3] == RSP_CODE_GOOD)
feac6a07 2209 set_host_byte(scpnt, DID_OK);
c41f8cbd 2210 else {
feac6a07 2211 set_host_byte(scpnt, DID_ERROR);
6f71d9bc 2212 goto skip_fsfstatus;
1da177e4
LT		 2213 }
2214 }
2215
1da177e4 2216 if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
c41f8cbd
SS		 2217 sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
2218 fcp_rsp_iu->fcp_rsp_len;
1da177e4 2219 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
1da177e4 2220 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
1da177e4 2221
9d058ecf 2222 memcpy(scpnt->sense_buffer,
1da177e4 2223 zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
1da177e4
LT		 2224 }
2225
1da177e4 2226 if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
7936a892
FT		 2227 scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
2228 if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
2229 scpnt->underflow)
feac6a07 2230 set_host_byte(scpnt, DID_ERROR);
1da177e4 2231 }
c41f8cbd 2232skip_fsfstatus:
8a36e453 2233 if (scpnt->result != 0)
5771710b 2234 zfcp_dbf_scsi_result("erro", 3, req->adapter->dbf, scpnt, req);
8a36e453 2235 else if (scpnt->retries > 0)
5771710b 2236 zfcp_dbf_scsi_result("retr", 4, req->adapter->dbf, scpnt, req);
8a36e453 2237 else
5771710b 2238 zfcp_dbf_scsi_result("norm", 6, req->adapter->dbf, scpnt, req);
1da177e4 2239
1da177e4 2240 scpnt->host_scribble = NULL;
1da177e4 2241 (scpnt->scsi_done) (scpnt);
1da177e4
LT		 2242 /*
2243 * We must hold this lock until scsi_done has been called.
2244 * Otherwise we may call scsi_done after abort regarding this
2245 * command has completed.
2246 * Note: scsi_done must not block!
2247 */
c41f8cbd 2248 read_unlock_irqrestore(&req->adapter->abort_lock, flags);
1da177e4
LT		 2249}
2250
c41f8cbd 2251static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
1da177e4 2252{
1da177e4 2253 struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
c41f8cbd 2254 &(req->qtcb->bottom.io.fcp_rsp);
f76af7d7 2255 char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
1da177e4 2256
c41f8cbd
SS		 2257 if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
2258 (req->status & ZFCP_STATUS_FSFREQ_ERROR))
2259 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
2260}
2261
2262
2263static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
2264{
2265 struct zfcp_unit *unit;
2266 struct fsf_qtcb_header *header = &req->qtcb->header;
2267
2268 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
2269 unit = req->data;
2270 else
2271 unit = req->unit;
2272
2273 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
1da177e4 2274 goto skip_fsfstatus;
1da177e4 2275
c41f8cbd
SS		 2276 switch (header->fsf_status) {
2277 case FSF_HANDLE_MISMATCH:
2278 case FSF_PORT_HANDLE_NOT_VALID:
5ffd51a5 2279 zfcp_erp_adapter_reopen(unit->port->adapter, 0, "fssfch1", req);
c41f8cbd
SS		 2280 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2281 break;
2282 case FSF_FCPLUN_NOT_VALID:
2283 case FSF_LUN_HANDLE_NOT_VALID:
5ffd51a5 2284 zfcp_erp_port_reopen(unit->port, 0, "fssfch2", req);
c41f8cbd 2285 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2286 break;
c41f8cbd
SS		 2287 case FSF_SERVICE_CLASS_NOT_SUPPORTED:
2288 zfcp_fsf_class_not_supp(req);
1da177e4 2289 break;
c41f8cbd
SS		 2290 case FSF_ACCESS_DENIED:
2291 zfcp_fsf_access_denied_unit(req, unit);
2292 break;
2293 case FSF_DIRECTION_INDICATOR_NOT_VALID:
2294 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2295 "Incorrect direction %d, unit 0x%016Lx on port "
2296 "0x%016Lx closed\n",
c41f8cbd 2297 req->qtcb->bottom.io.data_direction,
7ba58c9c
SS		 2298 (unsigned long long)unit->fcp_lun,
2299 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2300 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch3",
2301 req);
c41f8cbd
SS		 2302 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2303 break;
2304 case FSF_CMND_LENGTH_NOT_VALID:
2305 dev_err(&req->adapter->ccw_device->dev,
ff3b24fa
CS		 2306 "Incorrect CDB length %d, unit 0x%016Lx on "
2307 "port 0x%016Lx closed\n",
c41f8cbd 2308 req->qtcb->bottom.io.fcp_cmnd_length,
7ba58c9c
SS		 2309 (unsigned long long)unit->fcp_lun,
2310 (unsigned long long)unit->port->wwpn);
5ffd51a5
SS		 2311 zfcp_erp_adapter_shutdown(unit->port->adapter, 0, "fssfch4",
2312 req);
c41f8cbd
SS		 2313 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2314 break;
2315 case FSF_PORT_BOXED:
5ffd51a5 2316 zfcp_erp_port_boxed(unit->port, "fssfch5", req);
c41f8cbd
SS		 2317 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2318 ZFCP_STATUS_FSFREQ_RETRY;
2319 break;
2320 case FSF_LUN_BOXED:
5ffd51a5 2321 zfcp_erp_unit_boxed(unit, "fssfch6", req);
c41f8cbd
SS		 2322 req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2323 ZFCP_STATUS_FSFREQ_RETRY;
2324 break;
2325 case FSF_ADAPTER_STATUS_AVAILABLE:
2326 if (header->fsf_status_qual.word[0] ==
2327 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
6f53a2d2 2328 zfcp_fc_test_link(unit->port);
c41f8cbd 2329 req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1da177e4 2330 break;
1da177e4 2331 }
c41f8cbd
SS		 2332skip_fsfstatus:
2333 if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
2334 zfcp_fsf_send_fcp_ctm_handler(req);
2335 else {
2336 zfcp_fsf_send_fcp_command_task_handler(req);
2337 req->unit = NULL;
2338 zfcp_unit_put(unit);
2339 }
1da177e4
LT		 2340}
2341
7ba58c9c
SS		 2342static void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, u32 fcp_dl)
2343{
2344 u32 *fcp_dl_ptr;
2345
2346 /*
2347 * fcp_dl_addr = start address of fcp_cmnd structure +
2348 * size of fixed part + size of dynamically sized add_dcp_cdb field
2349 * SEE FCP-2 documentation
2350 */
2351 fcp_dl_ptr = (u32 *) ((unsigned char *) &fcp_cmd[1] +
2352 (fcp_cmd->add_fcp_cdb_length << 2));
2353 *fcp_dl_ptr = fcp_dl;
2354}
2355
c41f8cbd
SS		 2356/**
2357 * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
c41f8cbd
SS		 2358 * @unit: unit where command is sent to
2359 * @scsi_cmnd: scsi command to be sent
1da177e4 2360 */
63caf367
CS		 2361int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
2362 struct scsi_cmnd *scsi_cmnd)
1da177e4 2363{
c41f8cbd
SS		 2364 struct zfcp_fsf_req *req;
2365 struct fcp_cmnd_iu *fcp_cmnd_iu;
bc90c863 2366 unsigned int sbtype = SBAL_FLAGS0_TYPE_READ;
c41f8cbd 2367 int real_bytes, retval = -EIO;
63caf367 2368 struct zfcp_adapter *adapter = unit->port->adapter;
564e1c86 2369 struct zfcp_qdio *qdio = adapter->qdio;
1da177e4 2370
c41f8cbd
SS		 2371 if (unlikely(!(atomic_read(&unit->status) &
2372 ZFCP_STATUS_COMMON_UNBLOCKED)))
2373 return -EBUSY;
1da177e4 2374
564e1c86
SS		 2375 spin_lock(&qdio->req_q_lock);
2376 if (atomic_read(&qdio->req_q.count) <= 0) {
2377 atomic_inc(&qdio->req_q_full);
c41f8cbd 2378 goto out;
8fdf30d5 2379 }
09a46c6e 2380
564e1c86 2381 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
a4623c46 2382 adapter->pool.scsi_req);
09a46c6e 2383
025270f0 2384 if (IS_ERR(req)) {
c41f8cbd
SS		 2385 retval = PTR_ERR(req);
2386 goto out;
2387 }
2388
09a46c6e 2389 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
c41f8cbd
SS		 2390 zfcp_unit_get(unit);
2391 req->unit = unit;
2392 req->data = scsi_cmnd;
2393 req->handler = zfcp_fsf_send_fcp_command_handler;
2394 req->qtcb->header.lun_handle = unit->handle;
2395 req->qtcb->header.port_handle = unit->port->handle;
2396 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2397
2398 scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
2399
2400 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
2401 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2402 /*
2403 * set depending on data direction:
2404 * data direction bits in SBALE (SB Type)
2405 * data direction bits in QTCB
2406 * data direction bits in FCP_CMND IU
2407 */
2408 switch (scsi_cmnd->sc_data_direction) {
2409 case DMA_NONE:
2410 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
1da177e4 2411 break;
c41f8cbd
SS		 2412 case DMA_FROM_DEVICE:
2413 req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
c41f8cbd
SS		 2414 fcp_cmnd_iu->rddata = 1;
2415 break;
2416 case DMA_TO_DEVICE:
2417 req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
2418 sbtype = SBAL_FLAGS0_TYPE_WRITE;
2419 fcp_cmnd_iu->wddata = 1;
1da177e4 2420 break;
c41f8cbd 2421 case DMA_BIDIRECTIONAL:
c41f8cbd 2422 goto failed_scsi_cmnd;
1da177e4
LT		 2423 }
2424
c41f8cbd
SS		 2425 if (likely((scsi_cmnd->device->simple_tags) ||
2426 ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
2427 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
2428 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
2429 else
2430 fcp_cmnd_iu->task_attribute = UNTAGGED;
1da177e4 2431
c41f8cbd
SS		 2432 if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
2433 fcp_cmnd_iu->add_fcp_cdb_length =
2434 (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
1da177e4 2435
c41f8cbd 2436 memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
45633fdc 2437
c41f8cbd 2438 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2439 fcp_cmnd_iu->add_fcp_cdb_length + sizeof(u32);
1da177e4 2440
564e1c86 2441 real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req, sbtype,
c41f8cbd
SS		 2442 scsi_sglist(scsi_cmnd),
2443 FSF_MAX_SBALS_PER_REQ);
2444 if (unlikely(real_bytes < 0)) {
42428f74 2445 if (req->queue_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) {
c41f8cbd 2446 dev_err(&adapter->ccw_device->dev,
ff3b24fa
CS		 2447 "Oversize data package, unit 0x%016Lx "
2448 "on port 0x%016Lx closed\n",
7ba58c9c
SS		 2449 (unsigned long long)unit->fcp_lun,
2450 (unsigned long long)unit->port->wwpn);
5ffd51a5 2451 zfcp_erp_unit_shutdown(unit, 0, "fssfct1", req);
c41f8cbd
SS		 2452 retval = -EINVAL;
2453 }
2454 goto failed_scsi_cmnd;
1da177e4 2455 }
1da177e4 2456
c41f8cbd 2457 zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
1da177e4 2458
c41f8cbd
SS		 2459 retval = zfcp_fsf_req_send(req);
2460 if (unlikely(retval))
2461 goto failed_scsi_cmnd;
1da177e4 2462
c41f8cbd 2463 goto out;
1da177e4 2464
c41f8cbd
SS		 2465failed_scsi_cmnd:
2466 zfcp_unit_put(unit);
2467 zfcp_fsf_req_free(req);
2468 scsi_cmnd->host_scribble = NULL;
2469out:
564e1c86 2470 spin_unlock(&qdio->req_q_lock);
c41f8cbd 2471 return retval;
1da177e4
LT		 2472}
2473
2474/**
c41f8cbd 2475 * zfcp_fsf_send_fcp_ctm - send SCSI task management command
c41f8cbd
SS		 2476 * @unit: pointer to struct zfcp_unit
2477 * @tm_flags: unsigned byte for task management flags
c41f8cbd 2478 * Returns: on success pointer to struct fsf_req, NULL otherwise
1da177e4 2479 */
63caf367 2480struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
1da177e4 2481{
44cc76f2 2482 struct qdio_buffer_element *sbale;
c41f8cbd
SS		 2483 struct zfcp_fsf_req *req = NULL;
2484 struct fcp_cmnd_iu *fcp_cmnd_iu;
564e1c86 2485 struct zfcp_qdio *qdio = unit->port->adapter->qdio;
1da177e4 2486
c41f8cbd
SS		 2487 if (unlikely(!(atomic_read(&unit->status) &
2488 ZFCP_STATUS_COMMON_UNBLOCKED)))
2489 return NULL;
1da177e4 2490
564e1c86
SS		 2491 spin_lock_bh(&qdio->req_q_lock);
2492 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2493 goto out;
09a46c6e 2494
564e1c86
SS		 2495 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND,
2496 qdio->adapter->pool.scsi_req);
09a46c6e 2497
633528c3
SS		 2498 if (IS_ERR(req)) {
2499 req = NULL;
c41f8cbd 2500 goto out;
633528c3 2501 }
1da177e4 2502
c41f8cbd
SS		 2503 req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
2504 req->data = unit;
2505 req->handler = zfcp_fsf_send_fcp_command_handler;
2506 req->qtcb->header.lun_handle = unit->handle;
2507 req->qtcb->header.port_handle = unit->port->handle;
2508 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
2509 req->qtcb->bottom.io.service_class = FSF_CLASS_3;
2510 req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
7ba58c9c 2511 sizeof(u32);
c41f8cbd 2512
564e1c86 2513 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd
SS		 2514 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
2515 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1da177e4 2516
c41f8cbd
SS		 2517 fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
2518 fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
2519 fcp_cmnd_iu->task_management_flags = tm_flags;
1da177e4 2520
c41f8cbd
SS		 2521 zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
2522 if (!zfcp_fsf_req_send(req))
2523 goto out;
1da177e4 2524
c41f8cbd
SS		 2525 zfcp_fsf_req_free(req);
2526 req = NULL;
2527out:
564e1c86 2528 spin_unlock_bh(&qdio->req_q_lock);
c41f8cbd
SS		 2529 return req;
2530}
1da177e4 2531
c41f8cbd
SS		 2532static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
2533{
1da177e4
LT		 2534}
2535
c41f8cbd
SS		 2536/**
2537 * zfcp_fsf_control_file - control file upload/download
2538 * @adapter: pointer to struct zfcp_adapter
2539 * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
2540 * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
1da177e4 2541 */
c41f8cbd
SS		 2542struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
2543 struct zfcp_fsf_cfdc *fsf_cfdc)
1da177e4 2544{
44cc76f2 2545 struct qdio_buffer_element *sbale;
564e1c86 2546 struct zfcp_qdio *qdio = adapter->qdio;
c41f8cbd
SS		 2547 struct zfcp_fsf_req *req = NULL;
2548 struct fsf_qtcb_bottom_support *bottom;
2549 int direction, retval = -EIO, bytes;
2550
2551 if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
2552 return ERR_PTR(-EOPNOTSUPP);
2553
2554 switch (fsf_cfdc->command) {
2555 case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
2556 direction = SBAL_FLAGS0_TYPE_WRITE;
2557 break;
2558 case FSF_QTCB_UPLOAD_CONTROL_FILE:
2559 direction = SBAL_FLAGS0_TYPE_READ;
2560 break;
2561 default:
2562 return ERR_PTR(-EINVAL);
2563 }
1da177e4 2564
564e1c86
SS		 2565 spin_lock_bh(&qdio->req_q_lock);
2566 if (zfcp_fsf_req_sbal_get(qdio))
c41f8cbd 2567 goto out;
1da177e4 2568
564e1c86 2569 req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL);
025270f0 2570 if (IS_ERR(req)) {
c41f8cbd
SS		 2571 retval = -EPERM;
2572 goto out;
2573 }
1da177e4 2574
c41f8cbd 2575 req->handler = zfcp_fsf_control_file_handler;
1da177e4 2576
564e1c86 2577 sbale = zfcp_qdio_sbale_req(qdio, &req->queue_req);
c41f8cbd 2578 sbale[0].flags |= direction;
8a36e453 2579
c41f8cbd
SS		 2580 bottom = &req->qtcb->bottom.support;
2581 bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
2582 bottom->option = fsf_cfdc->option;
8a36e453 2583
564e1c86
SS		 2584 bytes = zfcp_qdio_sbals_from_sg(qdio, &req->queue_req,
2585 direction, fsf_cfdc->sg,
2586 FSF_MAX_SBALS_PER_REQ);
c41f8cbd 2587 if (bytes != ZFCP_CFDC_MAX_SIZE) {
c41f8cbd
SS		 2588 zfcp_fsf_req_free(req);
2589 goto out;
2590 }
1da177e4 2591
c41f8cbd
SS		 2592 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
2593 retval = zfcp_fsf_req_send(req);
2594out:
564e1c86 2595 spin_unlock_bh(&qdio->req_q_lock);
8a36e453 2596
c41f8cbd 2597 if (!retval) {
058b8647 2598 wait_for_completion(&req->completion);
c41f8cbd 2599 return req;
1da177e4 2600 }
c41f8cbd 2601 return ERR_PTR(retval);
1da177e4 2602}
bd63eaf4
SS		 2603
2604/**
2605 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO
2606 * @adapter: pointer to struct zfcp_adapter
2607 * @sbal_idx: response queue index of SBAL to be processed
2608 */
564e1c86 2609void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx)
bd63eaf4 2610{
564e1c86
SS		 2611 struct zfcp_adapter *adapter = qdio->adapter;
2612 struct qdio_buffer *sbal = qdio->resp_q.sbal[sbal_idx];
bd63eaf4
SS		 2613 struct qdio_buffer_element *sbale;
2614 struct zfcp_fsf_req *fsf_req;
2615 unsigned long flags, req_id;
2616 int idx;
2617
2618 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) {
2619
2620 sbale = &sbal->element[idx];
2621 req_id = (unsigned long) sbale->addr;
2622 spin_lock_irqsave(&adapter->req_list_lock, flags);
2623 fsf_req = zfcp_reqlist_find(adapter, req_id);
2624
2625 if (!fsf_req)
2626 /*
2627 * Unknown request means that we have potentially memory
2628 * corruption and must stop the machine immediately.
2629 */
2630 panic("error: unknown req_id (%lx) on adapter %s.\n",
2631 req_id, dev_name(&adapter->ccw_device->dev));
2632
2633 list_del(&fsf_req->list);
2634 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
2635
42428f74
SS		 2636 fsf_req->queue_req.sbal_response = sbal_idx;
2637 fsf_req->queue_req.qdio_inb_usage =
564e1c86 2638 atomic_read(&qdio->resp_q.count);
bd63eaf4
SS		 2639 zfcp_fsf_req_complete(fsf_req);
2640
2641 if (likely(sbale->flags & SBAL_FLAGS_LAST_ENTRY))
2642 break;
2643 }
2644}
Linux 6.x block layer and io_uring tree(s)