1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * zfcp device driver 4 * 5 * Implementation of FSF commands. 6 * 7 * Copyright IBM Corp. 2002, 2018 8 */ 9 10 #define KMSG_COMPONENT "zfcp" 11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 12 13 #include <linux/blktrace_api.h> 14 #include <linux/slab.h> 15 #include <scsi/fc/fc_els.h> 16 #include "zfcp_ext.h" 17 #include "zfcp_fc.h" 18 #include "zfcp_dbf.h" 19 #include "zfcp_qdio.h" 20 #include "zfcp_reqlist.h" 21 22 /* timeout for FSF requests sent during scsi_eh: abort or FCP TMF */ 23 #define ZFCP_FSF_SCSI_ER_TIMEOUT (10*HZ) 24 /* timeout for: exchange config/port data outside ERP, or open/close WKA port */ 25 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) 26 27 struct kmem_cache *zfcp_fsf_qtcb_cache; 28 29 static void zfcp_fsf_request_timeout_handler(struct timer_list *t) 30 { 31 struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer); 32 struct zfcp_adapter *adapter = fsf_req->adapter; 33 34 zfcp_qdio_siosl(adapter); 35 zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 36 "fsrth_1"); 37 } 38 39 static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, 40 unsigned long timeout) 41 { 42 fsf_req->timer.function = zfcp_fsf_request_timeout_handler; 43 fsf_req->timer.expires = jiffies + timeout; 44 add_timer(&fsf_req->timer); 45 } 46 47 static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req) 48 { 49 BUG_ON(!fsf_req->erp_action); 50 fsf_req->timer.function = zfcp_erp_timeout_handler; 51 fsf_req->timer.expires = jiffies + 30 * HZ; 52 add_timer(&fsf_req->timer); 53 } 54 55 /* association between FSF command and FSF QTCB type */ 56 static u32 fsf_qtcb_type[] = { 57 [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, 58 [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, 59 [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, 60 [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, 61 [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, 62 [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, 63 [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, 64 [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, 65 [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, 66 [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, 67 [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, 68 [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, 69 [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND 70 }; 71 72 static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) 73 { 74 dev_err(&req->adapter->ccw_device->dev, "FCP device not " 75 "operational because of an unsupported FC class\n"); 76 zfcp_erp_adapter_shutdown(req->adapter, 0, "fscns_1"); 77 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 78 } 79 80 /** 81 * zfcp_fsf_req_free - free memory used by fsf request 82 * @req: pointer to struct zfcp_fsf_req 83 */ 84 void zfcp_fsf_req_free(struct zfcp_fsf_req *req) 85 { 86 if (likely(req->pool)) { 87 if (likely(!zfcp_fsf_req_is_status_read_buffer(req))) 88 mempool_free(req->qtcb, req->adapter->pool.qtcb_pool); 89 mempool_free(req, req->pool); 90 return; 91 } 92 93 if (likely(!zfcp_fsf_req_is_status_read_buffer(req))) 94 kmem_cache_free(zfcp_fsf_qtcb_cache, req->qtcb); 95 kfree(req); 96 } 97 98 static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req) 99 { 100 unsigned long flags; 101 struct fsf_status_read_buffer *sr_buf = req->data; 102 struct zfcp_adapter *adapter = req->adapter; 103 struct zfcp_port *port; 104 int d_id = ntoh24(sr_buf->d_id); 105 106 read_lock_irqsave(&adapter->port_list_lock, flags); 107 list_for_each_entry(port, &adapter->port_list, list) 108 if (port->d_id == d_id) { 109 zfcp_erp_port_reopen(port, 0, "fssrpc1"); 110 break; 111 } 112 read_unlock_irqrestore(&adapter->port_list_lock, flags); 113 } 114 115 static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, 116 struct fsf_link_down_info *link_down) 117 { 118 struct zfcp_adapter *adapter = req->adapter; 119 120 if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) 121 return; 122 123 atomic_or(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); 124 125 zfcp_scsi_schedule_rports_block(adapter); 126 127 if (!link_down) 128 goto out; 129 130 switch (link_down->error_code) { 131 case FSF_PSQ_LINK_NO_LIGHT: 132 dev_warn(&req->adapter->ccw_device->dev, 133 "There is no light signal from the local " 134 "fibre channel cable\n"); 135 break; 136 case FSF_PSQ_LINK_WRAP_PLUG: 137 dev_warn(&req->adapter->ccw_device->dev, 138 "There is a wrap plug instead of a fibre " 139 "channel cable\n"); 140 break; 141 case FSF_PSQ_LINK_NO_FCP: 142 dev_warn(&req->adapter->ccw_device->dev, 143 "The adjacent fibre channel node does not " 144 "support FCP\n"); 145 break; 146 case FSF_PSQ_LINK_FIRMWARE_UPDATE: 147 dev_warn(&req->adapter->ccw_device->dev, 148 "The FCP device is suspended because of a " 149 "firmware update\n"); 150 break; 151 case FSF_PSQ_LINK_INVALID_WWPN: 152 dev_warn(&req->adapter->ccw_device->dev, 153 "The FCP device detected a WWPN that is " 154 "duplicate or not valid\n"); 155 break; 156 case FSF_PSQ_LINK_NO_NPIV_SUPPORT: 157 dev_warn(&req->adapter->ccw_device->dev, 158 "The fibre channel fabric does not support NPIV\n"); 159 break; 160 case FSF_PSQ_LINK_NO_FCP_RESOURCES: 161 dev_warn(&req->adapter->ccw_device->dev, 162 "The FCP adapter cannot support more NPIV ports\n"); 163 break; 164 case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: 165 dev_warn(&req->adapter->ccw_device->dev, 166 "The adjacent switch cannot support " 167 "more NPIV ports\n"); 168 break; 169 case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: 170 dev_warn(&req->adapter->ccw_device->dev, 171 "The FCP adapter could not log in to the " 172 "fibre channel fabric\n"); 173 break; 174 case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: 175 dev_warn(&req->adapter->ccw_device->dev, 176 "The WWPN assignment file on the FCP adapter " 177 "has been damaged\n"); 178 break; 179 case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: 180 dev_warn(&req->adapter->ccw_device->dev, 181 "The mode table on the FCP adapter " 182 "has been damaged\n"); 183 break; 184 case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: 185 dev_warn(&req->adapter->ccw_device->dev, 186 "All NPIV ports on the FCP adapter have " 187 "been assigned\n"); 188 break; 189 default: 190 dev_warn(&req->adapter->ccw_device->dev, 191 "The link between the FCP adapter and " 192 "the FC fabric is down\n"); 193 } 194 out: 195 zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_ERP_FAILED); 196 } 197 198 static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req) 199 { 200 struct fsf_status_read_buffer *sr_buf = req->data; 201 struct fsf_link_down_info *ldi = 202 (struct fsf_link_down_info *) &sr_buf->payload; 203 204 switch (sr_buf->status_subtype) { 205 case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: 206 case FSF_STATUS_READ_SUB_FDISC_FAILED: 207 zfcp_fsf_link_down_info_eval(req, ldi); 208 break; 209 case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: 210 zfcp_fsf_link_down_info_eval(req, NULL); 211 } 212 } 213 214 static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req) 215 { 216 struct zfcp_adapter *adapter = req->adapter; 217 struct fsf_status_read_buffer *sr_buf = req->data; 218 219 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 220 zfcp_dbf_hba_fsf_uss("fssrh_1", req); 221 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); 222 zfcp_fsf_req_free(req); 223 return; 224 } 225 226 zfcp_dbf_hba_fsf_uss("fssrh_4", req); 227 228 switch (sr_buf->status_type) { 229 case FSF_STATUS_READ_PORT_CLOSED: 230 zfcp_fsf_status_read_port_closed(req); 231 break; 232 case FSF_STATUS_READ_INCOMING_ELS: 233 zfcp_fc_incoming_els(req); 234 break; 235 case FSF_STATUS_READ_SENSE_DATA_AVAIL: 236 break; 237 case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: 238 dev_warn(&adapter->ccw_device->dev, 239 "The error threshold for checksum statistics " 240 "has been exceeded\n"); 241 zfcp_dbf_hba_bit_err("fssrh_3", req); 242 break; 243 case FSF_STATUS_READ_LINK_DOWN: 244 zfcp_fsf_status_read_link_down(req); 245 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKDOWN, 0); 246 break; 247 case FSF_STATUS_READ_LINK_UP: 248 dev_info(&adapter->ccw_device->dev, 249 "The local link has been restored\n"); 250 /* All ports should be marked as ready to run again */ 251 zfcp_erp_set_adapter_status(adapter, 252 ZFCP_STATUS_COMMON_RUNNING); 253 zfcp_erp_adapter_reopen(adapter, 254 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 255 ZFCP_STATUS_COMMON_ERP_FAILED, 256 "fssrh_2"); 257 zfcp_fc_enqueue_event(adapter, FCH_EVT_LINKUP, 0); 258 259 break; 260 case FSF_STATUS_READ_NOTIFICATION_LOST: 261 if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS) 262 zfcp_fc_conditional_port_scan(adapter); 263 break; 264 case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: 265 adapter->adapter_features = sr_buf->payload.word[0]; 266 break; 267 } 268 269 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); 270 zfcp_fsf_req_free(req); 271 272 atomic_inc(&adapter->stat_miss); 273 queue_work(adapter->work_queue, &adapter->stat_work); 274 } 275 276 static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req) 277 { 278 switch (req->qtcb->header.fsf_status_qual.word[0]) { 279 case FSF_SQ_FCP_RSP_AVAILABLE: 280 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 281 case FSF_SQ_NO_RETRY_POSSIBLE: 282 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 283 return; 284 case FSF_SQ_COMMAND_ABORTED: 285 break; 286 case FSF_SQ_NO_RECOM: 287 dev_err(&req->adapter->ccw_device->dev, 288 "The FCP adapter reported a problem " 289 "that cannot be recovered\n"); 290 zfcp_qdio_siosl(req->adapter); 291 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfsqe1"); 292 break; 293 } 294 /* all non-return stats set FSFREQ_ERROR*/ 295 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 296 } 297 298 static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req) 299 { 300 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) 301 return; 302 303 switch (req->qtcb->header.fsf_status) { 304 case FSF_UNKNOWN_COMMAND: 305 dev_err(&req->adapter->ccw_device->dev, 306 "The FCP adapter does not recognize the command 0x%x\n", 307 req->qtcb->header.fsf_command); 308 zfcp_erp_adapter_shutdown(req->adapter, 0, "fsfse_1"); 309 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 310 break; 311 case FSF_ADAPTER_STATUS_AVAILABLE: 312 zfcp_fsf_fsfstatus_qual_eval(req); 313 break; 314 } 315 } 316 317 static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req) 318 { 319 struct zfcp_adapter *adapter = req->adapter; 320 struct fsf_qtcb *qtcb = req->qtcb; 321 union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual; 322 323 zfcp_dbf_hba_fsf_response(req); 324 325 if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { 326 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 327 return; 328 } 329 330 switch (qtcb->prefix.prot_status) { 331 case FSF_PROT_GOOD: 332 case FSF_PROT_FSF_STATUS_PRESENTED: 333 return; 334 case FSF_PROT_QTCB_VERSION_ERROR: 335 dev_err(&adapter->ccw_device->dev, 336 "QTCB version 0x%x not supported by FCP adapter " 337 "(0x%x to 0x%x)\n", FSF_QTCB_CURRENT_VERSION, 338 psq->word[0], psq->word[1]); 339 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_1"); 340 break; 341 case FSF_PROT_ERROR_STATE: 342 case FSF_PROT_SEQ_NUMB_ERROR: 343 zfcp_erp_adapter_reopen(adapter, 0, "fspse_2"); 344 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 345 break; 346 case FSF_PROT_UNSUPP_QTCB_TYPE: 347 dev_err(&adapter->ccw_device->dev, 348 "The QTCB type is not supported by the FCP adapter\n"); 349 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_3"); 350 break; 351 case FSF_PROT_HOST_CONNECTION_INITIALIZING: 352 atomic_or(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, 353 &adapter->status); 354 break; 355 case FSF_PROT_DUPLICATE_REQUEST_ID: 356 dev_err(&adapter->ccw_device->dev, 357 "0x%Lx is an ambiguous request identifier\n", 358 (unsigned long long)qtcb->bottom.support.req_handle); 359 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_4"); 360 break; 361 case FSF_PROT_LINK_DOWN: 362 zfcp_fsf_link_down_info_eval(req, &psq->link_down_info); 363 /* go through reopen to flush pending requests */ 364 zfcp_erp_adapter_reopen(adapter, 0, "fspse_6"); 365 break; 366 case FSF_PROT_REEST_QUEUE: 367 /* All ports should be marked as ready to run again */ 368 zfcp_erp_set_adapter_status(adapter, 369 ZFCP_STATUS_COMMON_RUNNING); 370 zfcp_erp_adapter_reopen(adapter, 371 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | 372 ZFCP_STATUS_COMMON_ERP_FAILED, 373 "fspse_8"); 374 break; 375 default: 376 dev_err(&adapter->ccw_device->dev, 377 "0x%x is not a valid transfer protocol status\n", 378 qtcb->prefix.prot_status); 379 zfcp_qdio_siosl(adapter); 380 zfcp_erp_adapter_shutdown(adapter, 0, "fspse_9"); 381 } 382 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 383 } 384 385 /** 386 * zfcp_fsf_req_complete - process completion of a FSF request 387 * @req: The FSF request that has been completed. 388 * 389 * When a request has been completed either from the FCP adapter, 390 * or it has been dismissed due to a queue shutdown, this function 391 * is called to process the completion status and trigger further 392 * events related to the FSF request. 393 */ 394 static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req) 395 { 396 if (unlikely(zfcp_fsf_req_is_status_read_buffer(req))) { 397 zfcp_fsf_status_read_handler(req); 398 return; 399 } 400 401 del_timer(&req->timer); 402 zfcp_fsf_protstatus_eval(req); 403 zfcp_fsf_fsfstatus_eval(req); 404 req->handler(req); 405 406 if (req->erp_action) 407 zfcp_erp_notify(req->erp_action, 0); 408 409 if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) 410 zfcp_fsf_req_free(req); 411 else 412 complete(&req->completion); 413 } 414 415 /** 416 * zfcp_fsf_req_dismiss_all - dismiss all fsf requests 417 * @adapter: pointer to struct zfcp_adapter 418 * 419 * Never ever call this without shutting down the adapter first. 420 * Otherwise the adapter would continue using and corrupting s390 storage. 421 * Included BUG_ON() call to ensure this is done. 422 * ERP is supposed to be the only user of this function. 423 */ 424 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) 425 { 426 struct zfcp_fsf_req *req, *tmp; 427 LIST_HEAD(remove_queue); 428 429 BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP); 430 zfcp_reqlist_move(adapter->req_list, &remove_queue); 431 432 list_for_each_entry_safe(req, tmp, &remove_queue, list) { 433 list_del(&req->list); 434 req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; 435 zfcp_fsf_req_complete(req); 436 } 437 } 438 439 #define ZFCP_FSF_PORTSPEED_1GBIT (1 << 0) 440 #define ZFCP_FSF_PORTSPEED_2GBIT (1 << 1) 441 #define ZFCP_FSF_PORTSPEED_4GBIT (1 << 2) 442 #define ZFCP_FSF_PORTSPEED_10GBIT (1 << 3) 443 #define ZFCP_FSF_PORTSPEED_8GBIT (1 << 4) 444 #define ZFCP_FSF_PORTSPEED_16GBIT (1 << 5) 445 #define ZFCP_FSF_PORTSPEED_32GBIT (1 << 6) 446 #define ZFCP_FSF_PORTSPEED_64GBIT (1 << 7) 447 #define ZFCP_FSF_PORTSPEED_128GBIT (1 << 8) 448 #define ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED (1 << 15) 449 450 static u32 zfcp_fsf_convert_portspeed(u32 fsf_speed) 451 { 452 u32 fdmi_speed = 0; 453 if (fsf_speed & ZFCP_FSF_PORTSPEED_1GBIT) 454 fdmi_speed |= FC_PORTSPEED_1GBIT; 455 if (fsf_speed & ZFCP_FSF_PORTSPEED_2GBIT) 456 fdmi_speed |= FC_PORTSPEED_2GBIT; 457 if (fsf_speed & ZFCP_FSF_PORTSPEED_4GBIT) 458 fdmi_speed |= FC_PORTSPEED_4GBIT; 459 if (fsf_speed & ZFCP_FSF_PORTSPEED_10GBIT) 460 fdmi_speed |= FC_PORTSPEED_10GBIT; 461 if (fsf_speed & ZFCP_FSF_PORTSPEED_8GBIT) 462 fdmi_speed |= FC_PORTSPEED_8GBIT; 463 if (fsf_speed & ZFCP_FSF_PORTSPEED_16GBIT) 464 fdmi_speed |= FC_PORTSPEED_16GBIT; 465 if (fsf_speed & ZFCP_FSF_PORTSPEED_32GBIT) 466 fdmi_speed |= FC_PORTSPEED_32GBIT; 467 if (fsf_speed & ZFCP_FSF_PORTSPEED_64GBIT) 468 fdmi_speed |= FC_PORTSPEED_64GBIT; 469 if (fsf_speed & ZFCP_FSF_PORTSPEED_128GBIT) 470 fdmi_speed |= FC_PORTSPEED_128GBIT; 471 if (fsf_speed & ZFCP_FSF_PORTSPEED_NOT_NEGOTIATED) 472 fdmi_speed |= FC_PORTSPEED_NOT_NEGOTIATED; 473 return fdmi_speed; 474 } 475 476 static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) 477 { 478 struct fsf_qtcb_bottom_config *bottom = &req->qtcb->bottom.config; 479 struct zfcp_adapter *adapter = req->adapter; 480 struct Scsi_Host *shost = adapter->scsi_host; 481 struct fc_els_flogi *nsp, *plogi; 482 483 /* adjust pointers for missing command code */ 484 nsp = (struct fc_els_flogi *) ((u8 *)&bottom->nport_serv_param 485 - sizeof(u32)); 486 plogi = (struct fc_els_flogi *) ((u8 *)&bottom->plogi_payload 487 - sizeof(u32)); 488 489 if (req->data) 490 memcpy(req->data, bottom, sizeof(*bottom)); 491 492 fc_host_port_name(shost) = be64_to_cpu(nsp->fl_wwpn); 493 fc_host_node_name(shost) = be64_to_cpu(nsp->fl_wwnn); 494 fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3; 495 496 adapter->timer_ticks = bottom->timer_interval & ZFCP_FSF_TIMER_INT_MASK; 497 adapter->stat_read_buf_num = max(bottom->status_read_buf_num, 498 (u16)FSF_STATUS_READS_RECOM); 499 500 if (fc_host_permanent_port_name(shost) == -1) 501 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 502 503 zfcp_scsi_set_prot(adapter); 504 505 /* no error return above here, otherwise must fix call chains */ 506 /* do not evaluate invalid fields */ 507 if (req->qtcb->header.fsf_status == FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE) 508 return 0; 509 510 fc_host_port_id(shost) = ntoh24(bottom->s_id); 511 fc_host_speed(shost) = 512 zfcp_fsf_convert_portspeed(bottom->fc_link_speed); 513 514 adapter->hydra_version = bottom->adapter_type; 515 516 switch (bottom->fc_topology) { 517 case FSF_TOPO_P2P: 518 adapter->peer_d_id = ntoh24(bottom->peer_d_id); 519 adapter->peer_wwpn = be64_to_cpu(plogi->fl_wwpn); 520 adapter->peer_wwnn = be64_to_cpu(plogi->fl_wwnn); 521 fc_host_port_type(shost) = FC_PORTTYPE_PTP; 522 break; 523 case FSF_TOPO_FABRIC: 524 if (bottom->connection_features & FSF_FEATURE_NPIV_MODE) 525 fc_host_port_type(shost) = FC_PORTTYPE_NPIV; 526 else 527 fc_host_port_type(shost) = FC_PORTTYPE_NPORT; 528 break; 529 case FSF_TOPO_AL: 530 fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; 531 /* fall through */ 532 default: 533 dev_err(&adapter->ccw_device->dev, 534 "Unknown or unsupported arbitrated loop " 535 "fibre channel topology detected\n"); 536 zfcp_erp_adapter_shutdown(adapter, 0, "fsece_1"); 537 return -EIO; 538 } 539 540 return 0; 541 } 542 543 static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) 544 { 545 struct zfcp_adapter *adapter = req->adapter; 546 struct fsf_qtcb *qtcb = req->qtcb; 547 struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config; 548 struct Scsi_Host *shost = adapter->scsi_host; 549 550 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 551 return; 552 553 adapter->fsf_lic_version = bottom->lic_version; 554 adapter->adapter_features = bottom->adapter_features; 555 adapter->connection_features = bottom->connection_features; 556 adapter->peer_wwpn = 0; 557 adapter->peer_wwnn = 0; 558 adapter->peer_d_id = 0; 559 560 switch (qtcb->header.fsf_status) { 561 case FSF_GOOD: 562 if (zfcp_fsf_exchange_config_evaluate(req)) 563 return; 564 565 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { 566 dev_err(&adapter->ccw_device->dev, 567 "FCP adapter maximum QTCB size (%d bytes) " 568 "is too small\n", 569 bottom->max_qtcb_size); 570 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh1"); 571 return; 572 } 573 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 574 &adapter->status); 575 break; 576 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 577 fc_host_node_name(shost) = 0; 578 fc_host_port_name(shost) = 0; 579 fc_host_port_id(shost) = 0; 580 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 581 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; 582 adapter->hydra_version = 0; 583 584 /* avoids adapter shutdown to be able to recognize 585 * events such as LINK UP */ 586 atomic_or(ZFCP_STATUS_ADAPTER_XCONFIG_OK, 587 &adapter->status); 588 zfcp_fsf_link_down_info_eval(req, 589 &qtcb->header.fsf_status_qual.link_down_info); 590 if (zfcp_fsf_exchange_config_evaluate(req)) 591 return; 592 break; 593 default: 594 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh3"); 595 return; 596 } 597 598 if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { 599 adapter->hardware_version = bottom->hardware_version; 600 memcpy(fc_host_serial_number(shost), bottom->serial_number, 601 min(FC_SERIAL_NUMBER_SIZE, 17)); 602 EBCASC(fc_host_serial_number(shost), 603 min(FC_SERIAL_NUMBER_SIZE, 17)); 604 } 605 606 if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) { 607 dev_err(&adapter->ccw_device->dev, 608 "The FCP adapter only supports newer " 609 "control block versions\n"); 610 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh4"); 611 return; 612 } 613 if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) { 614 dev_err(&adapter->ccw_device->dev, 615 "The FCP adapter only supports older " 616 "control block versions\n"); 617 zfcp_erp_adapter_shutdown(adapter, 0, "fsecdh5"); 618 } 619 } 620 621 static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) 622 { 623 struct zfcp_adapter *adapter = req->adapter; 624 struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port; 625 struct Scsi_Host *shost = adapter->scsi_host; 626 627 if (req->data) 628 memcpy(req->data, bottom, sizeof(*bottom)); 629 630 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) { 631 fc_host_permanent_port_name(shost) = bottom->wwpn; 632 } else 633 fc_host_permanent_port_name(shost) = fc_host_port_name(shost); 634 fc_host_maxframe_size(shost) = bottom->maximum_frame_size; 635 fc_host_supported_speeds(shost) = 636 zfcp_fsf_convert_portspeed(bottom->supported_speed); 637 memcpy(fc_host_supported_fc4s(shost), bottom->supported_fc4_types, 638 FC_FC4_LIST_SIZE); 639 memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types, 640 FC_FC4_LIST_SIZE); 641 } 642 643 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) 644 { 645 struct fsf_qtcb *qtcb = req->qtcb; 646 647 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 648 return; 649 650 switch (qtcb->header.fsf_status) { 651 case FSF_GOOD: 652 zfcp_fsf_exchange_port_evaluate(req); 653 break; 654 case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: 655 zfcp_fsf_exchange_port_evaluate(req); 656 zfcp_fsf_link_down_info_eval(req, 657 &qtcb->header.fsf_status_qual.link_down_info); 658 break; 659 } 660 } 661 662 static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool) 663 { 664 struct zfcp_fsf_req *req; 665 666 if (likely(pool)) 667 req = mempool_alloc(pool, GFP_ATOMIC); 668 else 669 req = kmalloc(sizeof(*req), GFP_ATOMIC); 670 671 if (unlikely(!req)) 672 return NULL; 673 674 memset(req, 0, sizeof(*req)); 675 req->pool = pool; 676 return req; 677 } 678 679 static struct fsf_qtcb *zfcp_fsf_qtcb_alloc(mempool_t *pool) 680 { 681 struct fsf_qtcb *qtcb; 682 683 if (likely(pool)) 684 qtcb = mempool_alloc(pool, GFP_ATOMIC); 685 else 686 qtcb = kmem_cache_alloc(zfcp_fsf_qtcb_cache, GFP_ATOMIC); 687 688 if (unlikely(!qtcb)) 689 return NULL; 690 691 memset(qtcb, 0, sizeof(*qtcb)); 692 return qtcb; 693 } 694 695 static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, 696 u32 fsf_cmd, u8 sbtype, 697 mempool_t *pool) 698 { 699 struct zfcp_adapter *adapter = qdio->adapter; 700 struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool); 701 702 if (unlikely(!req)) 703 return ERR_PTR(-ENOMEM); 704 705 if (adapter->req_no == 0) 706 adapter->req_no++; 707 708 INIT_LIST_HEAD(&req->list); 709 timer_setup(&req->timer, NULL, 0); 710 init_completion(&req->completion); 711 712 req->adapter = adapter; 713 req->req_id = adapter->req_no; 714 715 if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) { 716 if (likely(pool)) 717 req->qtcb = zfcp_fsf_qtcb_alloc( 718 adapter->pool.qtcb_pool); 719 else 720 req->qtcb = zfcp_fsf_qtcb_alloc(NULL); 721 722 if (unlikely(!req->qtcb)) { 723 zfcp_fsf_req_free(req); 724 return ERR_PTR(-ENOMEM); 725 } 726 727 req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; 728 req->qtcb->prefix.req_id = req->req_id; 729 req->qtcb->prefix.ulp_info = 26; 730 req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd]; 731 req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; 732 req->qtcb->header.req_handle = req->req_id; 733 req->qtcb->header.fsf_command = fsf_cmd; 734 } 735 736 zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype, 737 req->qtcb, sizeof(struct fsf_qtcb)); 738 739 return req; 740 } 741 742 static int zfcp_fsf_req_send(struct zfcp_fsf_req *req) 743 { 744 struct zfcp_adapter *adapter = req->adapter; 745 struct zfcp_qdio *qdio = adapter->qdio; 746 int req_id = req->req_id; 747 748 zfcp_reqlist_add(adapter->req_list, req); 749 750 req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free); 751 req->issued = get_tod_clock(); 752 if (zfcp_qdio_send(qdio, &req->qdio_req)) { 753 del_timer(&req->timer); 754 /* lookup request again, list might have changed */ 755 zfcp_reqlist_find_rm(adapter->req_list, req_id); 756 zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1"); 757 return -EIO; 758 } 759 760 /* Don't increase for unsolicited status */ 761 if (!zfcp_fsf_req_is_status_read_buffer(req)) 762 adapter->fsf_req_seq_no++; 763 adapter->req_no++; 764 765 return 0; 766 } 767 768 /** 769 * zfcp_fsf_status_read - send status read request 770 * @qdio: pointer to struct zfcp_qdio 771 * Returns: 0 on success, ERROR otherwise 772 */ 773 int zfcp_fsf_status_read(struct zfcp_qdio *qdio) 774 { 775 struct zfcp_adapter *adapter = qdio->adapter; 776 struct zfcp_fsf_req *req; 777 struct fsf_status_read_buffer *sr_buf; 778 struct page *page; 779 int retval = -EIO; 780 781 spin_lock_irq(&qdio->req_q_lock); 782 if (zfcp_qdio_sbal_get(qdio)) 783 goto out; 784 785 req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 786 SBAL_SFLAGS0_TYPE_STATUS, 787 adapter->pool.status_read_req); 788 if (IS_ERR(req)) { 789 retval = PTR_ERR(req); 790 goto out; 791 } 792 793 page = mempool_alloc(adapter->pool.sr_data, GFP_ATOMIC); 794 if (!page) { 795 retval = -ENOMEM; 796 goto failed_buf; 797 } 798 sr_buf = page_address(page); 799 memset(sr_buf, 0, sizeof(*sr_buf)); 800 req->data = sr_buf; 801 802 zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf)); 803 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 804 805 retval = zfcp_fsf_req_send(req); 806 if (retval) 807 goto failed_req_send; 808 809 goto out; 810 811 failed_req_send: 812 req->data = NULL; 813 mempool_free(virt_to_page(sr_buf), adapter->pool.sr_data); 814 failed_buf: 815 zfcp_dbf_hba_fsf_uss("fssr__1", req); 816 zfcp_fsf_req_free(req); 817 out: 818 spin_unlock_irq(&qdio->req_q_lock); 819 return retval; 820 } 821 822 static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) 823 { 824 struct scsi_device *sdev = req->data; 825 struct zfcp_scsi_dev *zfcp_sdev; 826 union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual; 827 828 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 829 return; 830 831 zfcp_sdev = sdev_to_zfcp(sdev); 832 833 switch (req->qtcb->header.fsf_status) { 834 case FSF_PORT_HANDLE_NOT_VALID: 835 if (fsq->word[0] == fsq->word[1]) { 836 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, 837 "fsafch1"); 838 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 839 } 840 break; 841 case FSF_LUN_HANDLE_NOT_VALID: 842 if (fsq->word[0] == fsq->word[1]) { 843 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fsafch2"); 844 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 845 } 846 break; 847 case FSF_FCP_COMMAND_DOES_NOT_EXIST: 848 req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; 849 break; 850 case FSF_PORT_BOXED: 851 zfcp_erp_set_port_status(zfcp_sdev->port, 852 ZFCP_STATUS_COMMON_ACCESS_BOXED); 853 zfcp_erp_port_reopen(zfcp_sdev->port, 854 ZFCP_STATUS_COMMON_ERP_FAILED, "fsafch3"); 855 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 856 break; 857 case FSF_LUN_BOXED: 858 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED); 859 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED, 860 "fsafch4"); 861 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 862 break; 863 case FSF_ADAPTER_STATUS_AVAILABLE: 864 switch (fsq->word[0]) { 865 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 866 zfcp_fc_test_link(zfcp_sdev->port); 867 /* fall through */ 868 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 869 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 870 break; 871 } 872 break; 873 case FSF_GOOD: 874 req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; 875 break; 876 } 877 } 878 879 /** 880 * zfcp_fsf_abort_fcp_cmnd - abort running SCSI command 881 * @scmnd: The SCSI command to abort 882 * Returns: pointer to struct zfcp_fsf_req 883 */ 884 885 struct zfcp_fsf_req *zfcp_fsf_abort_fcp_cmnd(struct scsi_cmnd *scmnd) 886 { 887 struct zfcp_fsf_req *req = NULL; 888 struct scsi_device *sdev = scmnd->device; 889 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 890 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio; 891 unsigned long old_req_id = (unsigned long) scmnd->host_scribble; 892 893 spin_lock_irq(&qdio->req_q_lock); 894 if (zfcp_qdio_sbal_get(qdio)) 895 goto out; 896 req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND, 897 SBAL_SFLAGS0_TYPE_READ, 898 qdio->adapter->pool.scsi_abort); 899 if (IS_ERR(req)) { 900 req = NULL; 901 goto out; 902 } 903 904 if (unlikely(!(atomic_read(&zfcp_sdev->status) & 905 ZFCP_STATUS_COMMON_UNBLOCKED))) 906 goto out_error_free; 907 908 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 909 910 req->data = sdev; 911 req->handler = zfcp_fsf_abort_fcp_command_handler; 912 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 913 req->qtcb->header.port_handle = zfcp_sdev->port->handle; 914 req->qtcb->bottom.support.req_handle = (u64) old_req_id; 915 916 zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT); 917 if (!zfcp_fsf_req_send(req)) 918 goto out; 919 920 out_error_free: 921 zfcp_fsf_req_free(req); 922 req = NULL; 923 out: 924 spin_unlock_irq(&qdio->req_q_lock); 925 return req; 926 } 927 928 static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req) 929 { 930 struct zfcp_adapter *adapter = req->adapter; 931 struct zfcp_fsf_ct_els *ct = req->data; 932 struct fsf_qtcb_header *header = &req->qtcb->header; 933 934 ct->status = -EINVAL; 935 936 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 937 goto skip_fsfstatus; 938 939 switch (header->fsf_status) { 940 case FSF_GOOD: 941 ct->status = 0; 942 zfcp_dbf_san_res("fsscth2", req); 943 break; 944 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 945 zfcp_fsf_class_not_supp(req); 946 break; 947 case FSF_ADAPTER_STATUS_AVAILABLE: 948 switch (header->fsf_status_qual.word[0]){ 949 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 950 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 951 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 952 break; 953 } 954 break; 955 case FSF_PORT_BOXED: 956 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 957 break; 958 case FSF_PORT_HANDLE_NOT_VALID: 959 zfcp_erp_adapter_reopen(adapter, 0, "fsscth1"); 960 /* fall through */ 961 case FSF_GENERIC_COMMAND_REJECTED: 962 case FSF_PAYLOAD_SIZE_MISMATCH: 963 case FSF_REQUEST_SIZE_TOO_LARGE: 964 case FSF_RESPONSE_SIZE_TOO_LARGE: 965 case FSF_SBAL_MISMATCH: 966 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 967 break; 968 } 969 970 skip_fsfstatus: 971 if (ct->handler) 972 ct->handler(ct->handler_data); 973 } 974 975 static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio, 976 struct zfcp_qdio_req *q_req, 977 struct scatterlist *sg_req, 978 struct scatterlist *sg_resp) 979 { 980 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length); 981 zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length); 982 zfcp_qdio_set_sbale_last(qdio, q_req); 983 } 984 985 static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, 986 struct scatterlist *sg_req, 987 struct scatterlist *sg_resp) 988 { 989 struct zfcp_adapter *adapter = req->adapter; 990 struct zfcp_qdio *qdio = adapter->qdio; 991 struct fsf_qtcb *qtcb = req->qtcb; 992 u32 feat = adapter->adapter_features; 993 994 if (zfcp_adapter_multi_buffer_active(adapter)) { 995 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req)) 996 return -EIO; 997 qtcb->bottom.support.req_buf_length = 998 zfcp_qdio_real_bytes(sg_req); 999 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp)) 1000 return -EIO; 1001 qtcb->bottom.support.resp_buf_length = 1002 zfcp_qdio_real_bytes(sg_resp); 1003 1004 zfcp_qdio_set_data_div(qdio, &req->qdio_req, sg_nents(sg_req)); 1005 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1006 zfcp_qdio_set_scount(qdio, &req->qdio_req); 1007 return 0; 1008 } 1009 1010 /* use single, unchained SBAL if it can hold the request */ 1011 if (zfcp_qdio_sg_one_sbale(sg_req) && zfcp_qdio_sg_one_sbale(sg_resp)) { 1012 zfcp_fsf_setup_ct_els_unchained(qdio, &req->qdio_req, 1013 sg_req, sg_resp); 1014 return 0; 1015 } 1016 1017 if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) 1018 return -EOPNOTSUPP; 1019 1020 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_req)) 1021 return -EIO; 1022 1023 qtcb->bottom.support.req_buf_length = zfcp_qdio_real_bytes(sg_req); 1024 1025 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1026 zfcp_qdio_skip_to_last_sbale(qdio, &req->qdio_req); 1027 1028 if (zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sg_resp)) 1029 return -EIO; 1030 1031 qtcb->bottom.support.resp_buf_length = zfcp_qdio_real_bytes(sg_resp); 1032 1033 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1034 1035 return 0; 1036 } 1037 1038 static int zfcp_fsf_setup_ct_els(struct zfcp_fsf_req *req, 1039 struct scatterlist *sg_req, 1040 struct scatterlist *sg_resp, 1041 unsigned int timeout) 1042 { 1043 int ret; 1044 1045 ret = zfcp_fsf_setup_ct_els_sbals(req, sg_req, sg_resp); 1046 if (ret) 1047 return ret; 1048 1049 /* common settings for ct/gs and els requests */ 1050 if (timeout > 255) 1051 timeout = 255; /* max value accepted by hardware */ 1052 req->qtcb->bottom.support.service_class = FSF_CLASS_3; 1053 req->qtcb->bottom.support.timeout = timeout; 1054 zfcp_fsf_start_timer(req, (timeout + 10) * HZ); 1055 1056 return 0; 1057 } 1058 1059 /** 1060 * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) 1061 * @wka_port: pointer to zfcp WKA port to send CT/GS to 1062 * @ct: pointer to struct zfcp_send_ct with data for request 1063 * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req 1064 * @timeout: timeout that hardware should use, and a later software timeout 1065 */ 1066 int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port, 1067 struct zfcp_fsf_ct_els *ct, mempool_t *pool, 1068 unsigned int timeout) 1069 { 1070 struct zfcp_qdio *qdio = wka_port->adapter->qdio; 1071 struct zfcp_fsf_req *req; 1072 int ret = -EIO; 1073 1074 spin_lock_irq(&qdio->req_q_lock); 1075 if (zfcp_qdio_sbal_get(qdio)) 1076 goto out; 1077 1078 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, 1079 SBAL_SFLAGS0_TYPE_WRITE_READ, pool); 1080 1081 if (IS_ERR(req)) { 1082 ret = PTR_ERR(req); 1083 goto out; 1084 } 1085 1086 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1087 ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, timeout); 1088 if (ret) 1089 goto failed_send; 1090 1091 req->handler = zfcp_fsf_send_ct_handler; 1092 req->qtcb->header.port_handle = wka_port->handle; 1093 ct->d_id = wka_port->d_id; 1094 req->data = ct; 1095 1096 zfcp_dbf_san_req("fssct_1", req, wka_port->d_id); 1097 1098 ret = zfcp_fsf_req_send(req); 1099 if (ret) 1100 goto failed_send; 1101 1102 goto out; 1103 1104 failed_send: 1105 zfcp_fsf_req_free(req); 1106 out: 1107 spin_unlock_irq(&qdio->req_q_lock); 1108 return ret; 1109 } 1110 1111 static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req) 1112 { 1113 struct zfcp_fsf_ct_els *send_els = req->data; 1114 struct fsf_qtcb_header *header = &req->qtcb->header; 1115 1116 send_els->status = -EINVAL; 1117 1118 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1119 goto skip_fsfstatus; 1120 1121 switch (header->fsf_status) { 1122 case FSF_GOOD: 1123 send_els->status = 0; 1124 zfcp_dbf_san_res("fsselh1", req); 1125 break; 1126 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 1127 zfcp_fsf_class_not_supp(req); 1128 break; 1129 case FSF_ADAPTER_STATUS_AVAILABLE: 1130 switch (header->fsf_status_qual.word[0]){ 1131 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1132 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1133 case FSF_SQ_RETRY_IF_POSSIBLE: 1134 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1135 break; 1136 } 1137 break; 1138 case FSF_ELS_COMMAND_REJECTED: 1139 case FSF_PAYLOAD_SIZE_MISMATCH: 1140 case FSF_REQUEST_SIZE_TOO_LARGE: 1141 case FSF_RESPONSE_SIZE_TOO_LARGE: 1142 break; 1143 case FSF_SBAL_MISMATCH: 1144 /* should never occur, avoided in zfcp_fsf_send_els */ 1145 /* fall through */ 1146 default: 1147 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1148 break; 1149 } 1150 skip_fsfstatus: 1151 if (send_els->handler) 1152 send_els->handler(send_els->handler_data); 1153 } 1154 1155 /** 1156 * zfcp_fsf_send_els - initiate an ELS command (FC-FS) 1157 * @adapter: pointer to zfcp adapter 1158 * @d_id: N_Port_ID to send ELS to 1159 * @els: pointer to struct zfcp_send_els with data for the command 1160 * @timeout: timeout that hardware should use, and a later software timeout 1161 */ 1162 int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id, 1163 struct zfcp_fsf_ct_els *els, unsigned int timeout) 1164 { 1165 struct zfcp_fsf_req *req; 1166 struct zfcp_qdio *qdio = adapter->qdio; 1167 int ret = -EIO; 1168 1169 spin_lock_irq(&qdio->req_q_lock); 1170 if (zfcp_qdio_sbal_get(qdio)) 1171 goto out; 1172 1173 req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, 1174 SBAL_SFLAGS0_TYPE_WRITE_READ, NULL); 1175 1176 if (IS_ERR(req)) { 1177 ret = PTR_ERR(req); 1178 goto out; 1179 } 1180 1181 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1182 1183 if (!zfcp_adapter_multi_buffer_active(adapter)) 1184 zfcp_qdio_sbal_limit(qdio, &req->qdio_req, 2); 1185 1186 ret = zfcp_fsf_setup_ct_els(req, els->req, els->resp, timeout); 1187 1188 if (ret) 1189 goto failed_send; 1190 1191 hton24(req->qtcb->bottom.support.d_id, d_id); 1192 req->handler = zfcp_fsf_send_els_handler; 1193 els->d_id = d_id; 1194 req->data = els; 1195 1196 zfcp_dbf_san_req("fssels1", req, d_id); 1197 1198 ret = zfcp_fsf_req_send(req); 1199 if (ret) 1200 goto failed_send; 1201 1202 goto out; 1203 1204 failed_send: 1205 zfcp_fsf_req_free(req); 1206 out: 1207 spin_unlock_irq(&qdio->req_q_lock); 1208 return ret; 1209 } 1210 1211 int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) 1212 { 1213 struct zfcp_fsf_req *req; 1214 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1215 int retval = -EIO; 1216 1217 spin_lock_irq(&qdio->req_q_lock); 1218 if (zfcp_qdio_sbal_get(qdio)) 1219 goto out; 1220 1221 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, 1222 SBAL_SFLAGS0_TYPE_READ, 1223 qdio->adapter->pool.erp_req); 1224 1225 if (IS_ERR(req)) { 1226 retval = PTR_ERR(req); 1227 goto out; 1228 } 1229 1230 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1231 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1232 1233 req->qtcb->bottom.config.feature_selection = 1234 FSF_FEATURE_NOTIFICATION_LOST | 1235 FSF_FEATURE_UPDATE_ALERT; 1236 req->erp_action = erp_action; 1237 req->handler = zfcp_fsf_exchange_config_data_handler; 1238 erp_action->fsf_req_id = req->req_id; 1239 1240 zfcp_fsf_start_erp_timer(req); 1241 retval = zfcp_fsf_req_send(req); 1242 if (retval) { 1243 zfcp_fsf_req_free(req); 1244 erp_action->fsf_req_id = 0; 1245 } 1246 out: 1247 spin_unlock_irq(&qdio->req_q_lock); 1248 return retval; 1249 } 1250 1251 int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio, 1252 struct fsf_qtcb_bottom_config *data) 1253 { 1254 struct zfcp_fsf_req *req = NULL; 1255 int retval = -EIO; 1256 1257 spin_lock_irq(&qdio->req_q_lock); 1258 if (zfcp_qdio_sbal_get(qdio)) 1259 goto out_unlock; 1260 1261 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, 1262 SBAL_SFLAGS0_TYPE_READ, NULL); 1263 1264 if (IS_ERR(req)) { 1265 retval = PTR_ERR(req); 1266 goto out_unlock; 1267 } 1268 1269 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1270 req->handler = zfcp_fsf_exchange_config_data_handler; 1271 1272 req->qtcb->bottom.config.feature_selection = 1273 FSF_FEATURE_NOTIFICATION_LOST | 1274 FSF_FEATURE_UPDATE_ALERT; 1275 1276 if (data) 1277 req->data = data; 1278 1279 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1280 retval = zfcp_fsf_req_send(req); 1281 spin_unlock_irq(&qdio->req_q_lock); 1282 if (!retval) 1283 wait_for_completion(&req->completion); 1284 1285 zfcp_fsf_req_free(req); 1286 return retval; 1287 1288 out_unlock: 1289 spin_unlock_irq(&qdio->req_q_lock); 1290 return retval; 1291 } 1292 1293 /** 1294 * zfcp_fsf_exchange_port_data - request information about local port 1295 * @erp_action: ERP action for the adapter for which port data is requested 1296 * Returns: 0 on success, error otherwise 1297 */ 1298 int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) 1299 { 1300 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1301 struct zfcp_fsf_req *req; 1302 int retval = -EIO; 1303 1304 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) 1305 return -EOPNOTSUPP; 1306 1307 spin_lock_irq(&qdio->req_q_lock); 1308 if (zfcp_qdio_sbal_get(qdio)) 1309 goto out; 1310 1311 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, 1312 SBAL_SFLAGS0_TYPE_READ, 1313 qdio->adapter->pool.erp_req); 1314 1315 if (IS_ERR(req)) { 1316 retval = PTR_ERR(req); 1317 goto out; 1318 } 1319 1320 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1321 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1322 1323 req->handler = zfcp_fsf_exchange_port_data_handler; 1324 req->erp_action = erp_action; 1325 erp_action->fsf_req_id = req->req_id; 1326 1327 zfcp_fsf_start_erp_timer(req); 1328 retval = zfcp_fsf_req_send(req); 1329 if (retval) { 1330 zfcp_fsf_req_free(req); 1331 erp_action->fsf_req_id = 0; 1332 } 1333 out: 1334 spin_unlock_irq(&qdio->req_q_lock); 1335 return retval; 1336 } 1337 1338 /** 1339 * zfcp_fsf_exchange_port_data_sync - request information about local port 1340 * @qdio: pointer to struct zfcp_qdio 1341 * @data: pointer to struct fsf_qtcb_bottom_port 1342 * Returns: 0 on success, error otherwise 1343 */ 1344 int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, 1345 struct fsf_qtcb_bottom_port *data) 1346 { 1347 struct zfcp_fsf_req *req = NULL; 1348 int retval = -EIO; 1349 1350 if (!(qdio->adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) 1351 return -EOPNOTSUPP; 1352 1353 spin_lock_irq(&qdio->req_q_lock); 1354 if (zfcp_qdio_sbal_get(qdio)) 1355 goto out_unlock; 1356 1357 req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, 1358 SBAL_SFLAGS0_TYPE_READ, NULL); 1359 1360 if (IS_ERR(req)) { 1361 retval = PTR_ERR(req); 1362 goto out_unlock; 1363 } 1364 1365 if (data) 1366 req->data = data; 1367 1368 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1369 1370 req->handler = zfcp_fsf_exchange_port_data_handler; 1371 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1372 retval = zfcp_fsf_req_send(req); 1373 spin_unlock_irq(&qdio->req_q_lock); 1374 1375 if (!retval) 1376 wait_for_completion(&req->completion); 1377 1378 zfcp_fsf_req_free(req); 1379 1380 return retval; 1381 1382 out_unlock: 1383 spin_unlock_irq(&qdio->req_q_lock); 1384 return retval; 1385 } 1386 1387 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) 1388 { 1389 struct zfcp_port *port = req->data; 1390 struct fsf_qtcb_header *header = &req->qtcb->header; 1391 struct fc_els_flogi *plogi; 1392 1393 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1394 goto out; 1395 1396 switch (header->fsf_status) { 1397 case FSF_PORT_ALREADY_OPEN: 1398 break; 1399 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 1400 dev_warn(&req->adapter->ccw_device->dev, 1401 "Not enough FCP adapter resources to open " 1402 "remote port 0x%016Lx\n", 1403 (unsigned long long)port->wwpn); 1404 zfcp_erp_set_port_status(port, 1405 ZFCP_STATUS_COMMON_ERP_FAILED); 1406 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1407 break; 1408 case FSF_ADAPTER_STATUS_AVAILABLE: 1409 switch (header->fsf_status_qual.word[0]) { 1410 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1411 /* no zfcp_fc_test_link() with failed open port */ 1412 /* fall through */ 1413 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1414 case FSF_SQ_NO_RETRY_POSSIBLE: 1415 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1416 break; 1417 } 1418 break; 1419 case FSF_GOOD: 1420 port->handle = header->port_handle; 1421 atomic_or(ZFCP_STATUS_COMMON_OPEN | 1422 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1423 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED, 1424 &port->status); 1425 /* check whether D_ID has changed during open */ 1426 /* 1427 * FIXME: This check is not airtight, as the FCP channel does 1428 * not monitor closures of target port connections caused on 1429 * the remote side. Thus, they might miss out on invalidating 1430 * locally cached WWPNs (and other N_Port parameters) of gone 1431 * target ports. So, our heroic attempt to make things safe 1432 * could be undermined by 'open port' response data tagged with 1433 * obsolete WWPNs. Another reason to monitor potential 1434 * connection closures ourself at least (by interpreting 1435 * incoming ELS' and unsolicited status). It just crosses my 1436 * mind that one should be able to cross-check by means of 1437 * another GID_PN straight after a port has been opened. 1438 * Alternately, an ADISC/PDISC ELS should suffice, as well. 1439 */ 1440 plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els; 1441 if (req->qtcb->bottom.support.els1_length >= 1442 FSF_PLOGI_MIN_LEN) 1443 zfcp_fc_plogi_evaluate(port, plogi); 1444 break; 1445 case FSF_UNKNOWN_OP_SUBTYPE: 1446 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1447 break; 1448 } 1449 1450 out: 1451 put_device(&port->dev); 1452 } 1453 1454 /** 1455 * zfcp_fsf_open_port - create and send open port request 1456 * @erp_action: pointer to struct zfcp_erp_action 1457 * Returns: 0 on success, error otherwise 1458 */ 1459 int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) 1460 { 1461 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1462 struct zfcp_port *port = erp_action->port; 1463 struct zfcp_fsf_req *req; 1464 int retval = -EIO; 1465 1466 spin_lock_irq(&qdio->req_q_lock); 1467 if (zfcp_qdio_sbal_get(qdio)) 1468 goto out; 1469 1470 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, 1471 SBAL_SFLAGS0_TYPE_READ, 1472 qdio->adapter->pool.erp_req); 1473 1474 if (IS_ERR(req)) { 1475 retval = PTR_ERR(req); 1476 goto out; 1477 } 1478 1479 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1480 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1481 1482 req->handler = zfcp_fsf_open_port_handler; 1483 hton24(req->qtcb->bottom.support.d_id, port->d_id); 1484 req->data = port; 1485 req->erp_action = erp_action; 1486 erp_action->fsf_req_id = req->req_id; 1487 get_device(&port->dev); 1488 1489 zfcp_fsf_start_erp_timer(req); 1490 retval = zfcp_fsf_req_send(req); 1491 if (retval) { 1492 zfcp_fsf_req_free(req); 1493 erp_action->fsf_req_id = 0; 1494 put_device(&port->dev); 1495 } 1496 out: 1497 spin_unlock_irq(&qdio->req_q_lock); 1498 return retval; 1499 } 1500 1501 static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) 1502 { 1503 struct zfcp_port *port = req->data; 1504 1505 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1506 return; 1507 1508 switch (req->qtcb->header.fsf_status) { 1509 case FSF_PORT_HANDLE_NOT_VALID: 1510 zfcp_erp_adapter_reopen(port->adapter, 0, "fscph_1"); 1511 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1512 break; 1513 case FSF_ADAPTER_STATUS_AVAILABLE: 1514 break; 1515 case FSF_GOOD: 1516 zfcp_erp_clear_port_status(port, ZFCP_STATUS_COMMON_OPEN); 1517 break; 1518 } 1519 } 1520 1521 /** 1522 * zfcp_fsf_close_port - create and send close port request 1523 * @erp_action: pointer to struct zfcp_erp_action 1524 * Returns: 0 on success, error otherwise 1525 */ 1526 int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) 1527 { 1528 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1529 struct zfcp_fsf_req *req; 1530 int retval = -EIO; 1531 1532 spin_lock_irq(&qdio->req_q_lock); 1533 if (zfcp_qdio_sbal_get(qdio)) 1534 goto out; 1535 1536 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, 1537 SBAL_SFLAGS0_TYPE_READ, 1538 qdio->adapter->pool.erp_req); 1539 1540 if (IS_ERR(req)) { 1541 retval = PTR_ERR(req); 1542 goto out; 1543 } 1544 1545 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1546 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1547 1548 req->handler = zfcp_fsf_close_port_handler; 1549 req->data = erp_action->port; 1550 req->erp_action = erp_action; 1551 req->qtcb->header.port_handle = erp_action->port->handle; 1552 erp_action->fsf_req_id = req->req_id; 1553 1554 zfcp_fsf_start_erp_timer(req); 1555 retval = zfcp_fsf_req_send(req); 1556 if (retval) { 1557 zfcp_fsf_req_free(req); 1558 erp_action->fsf_req_id = 0; 1559 } 1560 out: 1561 spin_unlock_irq(&qdio->req_q_lock); 1562 return retval; 1563 } 1564 1565 static void zfcp_fsf_open_wka_port_handler(struct zfcp_fsf_req *req) 1566 { 1567 struct zfcp_fc_wka_port *wka_port = req->data; 1568 struct fsf_qtcb_header *header = &req->qtcb->header; 1569 1570 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) { 1571 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 1572 goto out; 1573 } 1574 1575 switch (header->fsf_status) { 1576 case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: 1577 dev_warn(&req->adapter->ccw_device->dev, 1578 "Opening WKA port 0x%x failed\n", wka_port->d_id); 1579 /* fall through */ 1580 case FSF_ADAPTER_STATUS_AVAILABLE: 1581 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1582 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 1583 break; 1584 case FSF_GOOD: 1585 wka_port->handle = header->port_handle; 1586 /* fall through */ 1587 case FSF_PORT_ALREADY_OPEN: 1588 wka_port->status = ZFCP_FC_WKA_PORT_ONLINE; 1589 } 1590 out: 1591 wake_up(&wka_port->completion_wq); 1592 } 1593 1594 /** 1595 * zfcp_fsf_open_wka_port - create and send open wka-port request 1596 * @wka_port: pointer to struct zfcp_fc_wka_port 1597 * Returns: 0 on success, error otherwise 1598 */ 1599 int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port) 1600 { 1601 struct zfcp_qdio *qdio = wka_port->adapter->qdio; 1602 struct zfcp_fsf_req *req; 1603 int retval = -EIO; 1604 1605 spin_lock_irq(&qdio->req_q_lock); 1606 if (zfcp_qdio_sbal_get(qdio)) 1607 goto out; 1608 1609 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, 1610 SBAL_SFLAGS0_TYPE_READ, 1611 qdio->adapter->pool.erp_req); 1612 1613 if (IS_ERR(req)) { 1614 retval = PTR_ERR(req); 1615 goto out; 1616 } 1617 1618 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1619 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1620 1621 req->handler = zfcp_fsf_open_wka_port_handler; 1622 hton24(req->qtcb->bottom.support.d_id, wka_port->d_id); 1623 req->data = wka_port; 1624 1625 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1626 retval = zfcp_fsf_req_send(req); 1627 if (retval) 1628 zfcp_fsf_req_free(req); 1629 out: 1630 spin_unlock_irq(&qdio->req_q_lock); 1631 if (!retval) 1632 zfcp_dbf_rec_run_wka("fsowp_1", wka_port, req->req_id); 1633 return retval; 1634 } 1635 1636 static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req) 1637 { 1638 struct zfcp_fc_wka_port *wka_port = req->data; 1639 1640 if (req->qtcb->header.fsf_status == FSF_PORT_HANDLE_NOT_VALID) { 1641 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1642 zfcp_erp_adapter_reopen(wka_port->adapter, 0, "fscwph1"); 1643 } 1644 1645 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; 1646 wake_up(&wka_port->completion_wq); 1647 } 1648 1649 /** 1650 * zfcp_fsf_close_wka_port - create and send close wka port request 1651 * @wka_port: WKA port to open 1652 * Returns: 0 on success, error otherwise 1653 */ 1654 int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port) 1655 { 1656 struct zfcp_qdio *qdio = wka_port->adapter->qdio; 1657 struct zfcp_fsf_req *req; 1658 int retval = -EIO; 1659 1660 spin_lock_irq(&qdio->req_q_lock); 1661 if (zfcp_qdio_sbal_get(qdio)) 1662 goto out; 1663 1664 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, 1665 SBAL_SFLAGS0_TYPE_READ, 1666 qdio->adapter->pool.erp_req); 1667 1668 if (IS_ERR(req)) { 1669 retval = PTR_ERR(req); 1670 goto out; 1671 } 1672 1673 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1674 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1675 1676 req->handler = zfcp_fsf_close_wka_port_handler; 1677 req->data = wka_port; 1678 req->qtcb->header.port_handle = wka_port->handle; 1679 1680 zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); 1681 retval = zfcp_fsf_req_send(req); 1682 if (retval) 1683 zfcp_fsf_req_free(req); 1684 out: 1685 spin_unlock_irq(&qdio->req_q_lock); 1686 if (!retval) 1687 zfcp_dbf_rec_run_wka("fscwp_1", wka_port, req->req_id); 1688 return retval; 1689 } 1690 1691 static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) 1692 { 1693 struct zfcp_port *port = req->data; 1694 struct fsf_qtcb_header *header = &req->qtcb->header; 1695 struct scsi_device *sdev; 1696 1697 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1698 return; 1699 1700 switch (header->fsf_status) { 1701 case FSF_PORT_HANDLE_NOT_VALID: 1702 zfcp_erp_adapter_reopen(port->adapter, 0, "fscpph1"); 1703 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1704 break; 1705 case FSF_PORT_BOXED: 1706 /* can't use generic zfcp_erp_modify_port_status because 1707 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ 1708 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1709 shost_for_each_device(sdev, port->adapter->scsi_host) 1710 if (sdev_to_zfcp(sdev)->port == port) 1711 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, 1712 &sdev_to_zfcp(sdev)->status); 1713 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ACCESS_BOXED); 1714 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 1715 "fscpph2"); 1716 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1717 break; 1718 case FSF_ADAPTER_STATUS_AVAILABLE: 1719 switch (header->fsf_status_qual.word[0]) { 1720 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1721 /* fall through */ 1722 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1723 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1724 break; 1725 } 1726 break; 1727 case FSF_GOOD: 1728 /* can't use generic zfcp_erp_modify_port_status because 1729 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port 1730 */ 1731 atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); 1732 shost_for_each_device(sdev, port->adapter->scsi_host) 1733 if (sdev_to_zfcp(sdev)->port == port) 1734 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, 1735 &sdev_to_zfcp(sdev)->status); 1736 break; 1737 } 1738 } 1739 1740 /** 1741 * zfcp_fsf_close_physical_port - close physical port 1742 * @erp_action: pointer to struct zfcp_erp_action 1743 * Returns: 0 on success 1744 */ 1745 int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) 1746 { 1747 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1748 struct zfcp_fsf_req *req; 1749 int retval = -EIO; 1750 1751 spin_lock_irq(&qdio->req_q_lock); 1752 if (zfcp_qdio_sbal_get(qdio)) 1753 goto out; 1754 1755 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT, 1756 SBAL_SFLAGS0_TYPE_READ, 1757 qdio->adapter->pool.erp_req); 1758 1759 if (IS_ERR(req)) { 1760 retval = PTR_ERR(req); 1761 goto out; 1762 } 1763 1764 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1765 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1766 1767 req->data = erp_action->port; 1768 req->qtcb->header.port_handle = erp_action->port->handle; 1769 req->erp_action = erp_action; 1770 req->handler = zfcp_fsf_close_physical_port_handler; 1771 erp_action->fsf_req_id = req->req_id; 1772 1773 zfcp_fsf_start_erp_timer(req); 1774 retval = zfcp_fsf_req_send(req); 1775 if (retval) { 1776 zfcp_fsf_req_free(req); 1777 erp_action->fsf_req_id = 0; 1778 } 1779 out: 1780 spin_unlock_irq(&qdio->req_q_lock); 1781 return retval; 1782 } 1783 1784 static void zfcp_fsf_open_lun_handler(struct zfcp_fsf_req *req) 1785 { 1786 struct zfcp_adapter *adapter = req->adapter; 1787 struct scsi_device *sdev = req->data; 1788 struct zfcp_scsi_dev *zfcp_sdev; 1789 struct fsf_qtcb_header *header = &req->qtcb->header; 1790 union fsf_status_qual *qual = &header->fsf_status_qual; 1791 1792 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1793 return; 1794 1795 zfcp_sdev = sdev_to_zfcp(sdev); 1796 1797 atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED | 1798 ZFCP_STATUS_COMMON_ACCESS_BOXED, 1799 &zfcp_sdev->status); 1800 1801 switch (header->fsf_status) { 1802 1803 case FSF_PORT_HANDLE_NOT_VALID: 1804 zfcp_erp_adapter_reopen(adapter, 0, "fsouh_1"); 1805 /* fall through */ 1806 case FSF_LUN_ALREADY_OPEN: 1807 break; 1808 case FSF_PORT_BOXED: 1809 zfcp_erp_set_port_status(zfcp_sdev->port, 1810 ZFCP_STATUS_COMMON_ACCESS_BOXED); 1811 zfcp_erp_port_reopen(zfcp_sdev->port, 1812 ZFCP_STATUS_COMMON_ERP_FAILED, "fsouh_2"); 1813 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1814 break; 1815 case FSF_LUN_SHARING_VIOLATION: 1816 if (qual->word[0]) 1817 dev_warn(&zfcp_sdev->port->adapter->ccw_device->dev, 1818 "LUN 0x%016Lx on port 0x%016Lx is already in " 1819 "use by CSS%d, MIF Image ID %x\n", 1820 zfcp_scsi_dev_lun(sdev), 1821 (unsigned long long)zfcp_sdev->port->wwpn, 1822 qual->fsf_queue_designator.cssid, 1823 qual->fsf_queue_designator.hla); 1824 zfcp_erp_set_lun_status(sdev, 1825 ZFCP_STATUS_COMMON_ERP_FAILED | 1826 ZFCP_STATUS_COMMON_ACCESS_DENIED); 1827 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1828 break; 1829 case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: 1830 dev_warn(&adapter->ccw_device->dev, 1831 "No handle is available for LUN " 1832 "0x%016Lx on port 0x%016Lx\n", 1833 (unsigned long long)zfcp_scsi_dev_lun(sdev), 1834 (unsigned long long)zfcp_sdev->port->wwpn); 1835 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ERP_FAILED); 1836 /* fall through */ 1837 case FSF_INVALID_COMMAND_OPTION: 1838 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1839 break; 1840 case FSF_ADAPTER_STATUS_AVAILABLE: 1841 switch (header->fsf_status_qual.word[0]) { 1842 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1843 zfcp_fc_test_link(zfcp_sdev->port); 1844 /* fall through */ 1845 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1846 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1847 break; 1848 } 1849 break; 1850 1851 case FSF_GOOD: 1852 zfcp_sdev->lun_handle = header->lun_handle; 1853 atomic_or(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status); 1854 break; 1855 } 1856 } 1857 1858 /** 1859 * zfcp_fsf_open_lun - open LUN 1860 * @erp_action: pointer to struct zfcp_erp_action 1861 * Returns: 0 on success, error otherwise 1862 */ 1863 int zfcp_fsf_open_lun(struct zfcp_erp_action *erp_action) 1864 { 1865 struct zfcp_adapter *adapter = erp_action->adapter; 1866 struct zfcp_qdio *qdio = adapter->qdio; 1867 struct zfcp_fsf_req *req; 1868 int retval = -EIO; 1869 1870 spin_lock_irq(&qdio->req_q_lock); 1871 if (zfcp_qdio_sbal_get(qdio)) 1872 goto out; 1873 1874 req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN, 1875 SBAL_SFLAGS0_TYPE_READ, 1876 adapter->pool.erp_req); 1877 1878 if (IS_ERR(req)) { 1879 retval = PTR_ERR(req); 1880 goto out; 1881 } 1882 1883 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1884 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1885 1886 req->qtcb->header.port_handle = erp_action->port->handle; 1887 req->qtcb->bottom.support.fcp_lun = zfcp_scsi_dev_lun(erp_action->sdev); 1888 req->handler = zfcp_fsf_open_lun_handler; 1889 req->data = erp_action->sdev; 1890 req->erp_action = erp_action; 1891 erp_action->fsf_req_id = req->req_id; 1892 1893 if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) 1894 req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING; 1895 1896 zfcp_fsf_start_erp_timer(req); 1897 retval = zfcp_fsf_req_send(req); 1898 if (retval) { 1899 zfcp_fsf_req_free(req); 1900 erp_action->fsf_req_id = 0; 1901 } 1902 out: 1903 spin_unlock_irq(&qdio->req_q_lock); 1904 return retval; 1905 } 1906 1907 static void zfcp_fsf_close_lun_handler(struct zfcp_fsf_req *req) 1908 { 1909 struct scsi_device *sdev = req->data; 1910 struct zfcp_scsi_dev *zfcp_sdev; 1911 1912 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 1913 return; 1914 1915 zfcp_sdev = sdev_to_zfcp(sdev); 1916 1917 switch (req->qtcb->header.fsf_status) { 1918 case FSF_PORT_HANDLE_NOT_VALID: 1919 zfcp_erp_adapter_reopen(zfcp_sdev->port->adapter, 0, "fscuh_1"); 1920 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1921 break; 1922 case FSF_LUN_HANDLE_NOT_VALID: 1923 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fscuh_2"); 1924 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1925 break; 1926 case FSF_PORT_BOXED: 1927 zfcp_erp_set_port_status(zfcp_sdev->port, 1928 ZFCP_STATUS_COMMON_ACCESS_BOXED); 1929 zfcp_erp_port_reopen(zfcp_sdev->port, 1930 ZFCP_STATUS_COMMON_ERP_FAILED, "fscuh_3"); 1931 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1932 break; 1933 case FSF_ADAPTER_STATUS_AVAILABLE: 1934 switch (req->qtcb->header.fsf_status_qual.word[0]) { 1935 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: 1936 zfcp_fc_test_link(zfcp_sdev->port); 1937 /* fall through */ 1938 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: 1939 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 1940 break; 1941 } 1942 break; 1943 case FSF_GOOD: 1944 atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &zfcp_sdev->status); 1945 break; 1946 } 1947 } 1948 1949 /** 1950 * zfcp_fsf_close_LUN - close LUN 1951 * @erp_action: pointer to erp_action triggering the "close LUN" 1952 * Returns: 0 on success, error otherwise 1953 */ 1954 int zfcp_fsf_close_lun(struct zfcp_erp_action *erp_action) 1955 { 1956 struct zfcp_qdio *qdio = erp_action->adapter->qdio; 1957 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(erp_action->sdev); 1958 struct zfcp_fsf_req *req; 1959 int retval = -EIO; 1960 1961 spin_lock_irq(&qdio->req_q_lock); 1962 if (zfcp_qdio_sbal_get(qdio)) 1963 goto out; 1964 1965 req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN, 1966 SBAL_SFLAGS0_TYPE_READ, 1967 qdio->adapter->pool.erp_req); 1968 1969 if (IS_ERR(req)) { 1970 retval = PTR_ERR(req); 1971 goto out; 1972 } 1973 1974 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 1975 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 1976 1977 req->qtcb->header.port_handle = erp_action->port->handle; 1978 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 1979 req->handler = zfcp_fsf_close_lun_handler; 1980 req->data = erp_action->sdev; 1981 req->erp_action = erp_action; 1982 erp_action->fsf_req_id = req->req_id; 1983 1984 zfcp_fsf_start_erp_timer(req); 1985 retval = zfcp_fsf_req_send(req); 1986 if (retval) { 1987 zfcp_fsf_req_free(req); 1988 erp_action->fsf_req_id = 0; 1989 } 1990 out: 1991 spin_unlock_irq(&qdio->req_q_lock); 1992 return retval; 1993 } 1994 1995 static void zfcp_fsf_update_lat(struct zfcp_latency_record *lat_rec, u32 lat) 1996 { 1997 lat_rec->sum += lat; 1998 lat_rec->min = min(lat_rec->min, lat); 1999 lat_rec->max = max(lat_rec->max, lat); 2000 } 2001 2002 static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi) 2003 { 2004 struct fsf_qual_latency_info *lat_in; 2005 struct zfcp_latency_cont *lat = NULL; 2006 struct zfcp_scsi_dev *zfcp_sdev; 2007 struct zfcp_blk_drv_data blktrc; 2008 int ticks = req->adapter->timer_ticks; 2009 2010 lat_in = &req->qtcb->prefix.prot_status_qual.latency_info; 2011 2012 blktrc.flags = 0; 2013 blktrc.magic = ZFCP_BLK_DRV_DATA_MAGIC; 2014 if (req->status & ZFCP_STATUS_FSFREQ_ERROR) 2015 blktrc.flags |= ZFCP_BLK_REQ_ERROR; 2016 blktrc.inb_usage = 0; 2017 blktrc.outb_usage = req->qdio_req.qdio_outb_usage; 2018 2019 if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA && 2020 !(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 2021 zfcp_sdev = sdev_to_zfcp(scsi->device); 2022 blktrc.flags |= ZFCP_BLK_LAT_VALID; 2023 blktrc.channel_lat = lat_in->channel_lat * ticks; 2024 blktrc.fabric_lat = lat_in->fabric_lat * ticks; 2025 2026 switch (req->qtcb->bottom.io.data_direction) { 2027 case FSF_DATADIR_DIF_READ_STRIP: 2028 case FSF_DATADIR_DIF_READ_CONVERT: 2029 case FSF_DATADIR_READ: 2030 lat = &zfcp_sdev->latencies.read; 2031 break; 2032 case FSF_DATADIR_DIF_WRITE_INSERT: 2033 case FSF_DATADIR_DIF_WRITE_CONVERT: 2034 case FSF_DATADIR_WRITE: 2035 lat = &zfcp_sdev->latencies.write; 2036 break; 2037 case FSF_DATADIR_CMND: 2038 lat = &zfcp_sdev->latencies.cmd; 2039 break; 2040 } 2041 2042 if (lat) { 2043 spin_lock(&zfcp_sdev->latencies.lock); 2044 zfcp_fsf_update_lat(&lat->channel, lat_in->channel_lat); 2045 zfcp_fsf_update_lat(&lat->fabric, lat_in->fabric_lat); 2046 lat->counter++; 2047 spin_unlock(&zfcp_sdev->latencies.lock); 2048 } 2049 } 2050 2051 blk_add_driver_data(scsi->request->q, scsi->request, &blktrc, 2052 sizeof(blktrc)); 2053 } 2054 2055 /** 2056 * zfcp_fsf_fcp_handler_common() - FCP response handler common to I/O and TMF. 2057 * @req: Pointer to FSF request. 2058 * @sdev: Pointer to SCSI device as request context. 2059 */ 2060 static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req, 2061 struct scsi_device *sdev) 2062 { 2063 struct zfcp_scsi_dev *zfcp_sdev; 2064 struct fsf_qtcb_header *header = &req->qtcb->header; 2065 2066 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) 2067 return; 2068 2069 zfcp_sdev = sdev_to_zfcp(sdev); 2070 2071 switch (header->fsf_status) { 2072 case FSF_HANDLE_MISMATCH: 2073 case FSF_PORT_HANDLE_NOT_VALID: 2074 zfcp_erp_adapter_reopen(req->adapter, 0, "fssfch1"); 2075 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2076 break; 2077 case FSF_FCPLUN_NOT_VALID: 2078 case FSF_LUN_HANDLE_NOT_VALID: 2079 zfcp_erp_port_reopen(zfcp_sdev->port, 0, "fssfch2"); 2080 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2081 break; 2082 case FSF_SERVICE_CLASS_NOT_SUPPORTED: 2083 zfcp_fsf_class_not_supp(req); 2084 break; 2085 case FSF_DIRECTION_INDICATOR_NOT_VALID: 2086 dev_err(&req->adapter->ccw_device->dev, 2087 "Incorrect direction %d, LUN 0x%016Lx on port " 2088 "0x%016Lx closed\n", 2089 req->qtcb->bottom.io.data_direction, 2090 (unsigned long long)zfcp_scsi_dev_lun(sdev), 2091 (unsigned long long)zfcp_sdev->port->wwpn); 2092 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch3"); 2093 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2094 break; 2095 case FSF_CMND_LENGTH_NOT_VALID: 2096 dev_err(&req->adapter->ccw_device->dev, 2097 "Incorrect FCP_CMND length %d, FCP device closed\n", 2098 req->qtcb->bottom.io.fcp_cmnd_length); 2099 zfcp_erp_adapter_shutdown(req->adapter, 0, "fssfch4"); 2100 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2101 break; 2102 case FSF_PORT_BOXED: 2103 zfcp_erp_set_port_status(zfcp_sdev->port, 2104 ZFCP_STATUS_COMMON_ACCESS_BOXED); 2105 zfcp_erp_port_reopen(zfcp_sdev->port, 2106 ZFCP_STATUS_COMMON_ERP_FAILED, "fssfch5"); 2107 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2108 break; 2109 case FSF_LUN_BOXED: 2110 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_ACCESS_BOXED); 2111 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED, 2112 "fssfch6"); 2113 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2114 break; 2115 case FSF_ADAPTER_STATUS_AVAILABLE: 2116 if (header->fsf_status_qual.word[0] == 2117 FSF_SQ_INVOKE_LINK_TEST_PROCEDURE) 2118 zfcp_fc_test_link(zfcp_sdev->port); 2119 req->status |= ZFCP_STATUS_FSFREQ_ERROR; 2120 break; 2121 } 2122 } 2123 2124 static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req) 2125 { 2126 struct scsi_cmnd *scpnt; 2127 struct fcp_resp_with_ext *fcp_rsp; 2128 unsigned long flags; 2129 2130 read_lock_irqsave(&req->adapter->abort_lock, flags); 2131 2132 scpnt = req->data; 2133 if (unlikely(!scpnt)) { 2134 read_unlock_irqrestore(&req->adapter->abort_lock, flags); 2135 return; 2136 } 2137 2138 zfcp_fsf_fcp_handler_common(req, scpnt->device); 2139 2140 if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) { 2141 set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED); 2142 goto skip_fsfstatus; 2143 } 2144 2145 switch (req->qtcb->header.fsf_status) { 2146 case FSF_INCONSISTENT_PROT_DATA: 2147 case FSF_INVALID_PROT_PARM: 2148 set_host_byte(scpnt, DID_ERROR); 2149 goto skip_fsfstatus; 2150 case FSF_BLOCK_GUARD_CHECK_FAILURE: 2151 zfcp_scsi_dif_sense_error(scpnt, 0x1); 2152 goto skip_fsfstatus; 2153 case FSF_APP_TAG_CHECK_FAILURE: 2154 zfcp_scsi_dif_sense_error(scpnt, 0x2); 2155 goto skip_fsfstatus; 2156 case FSF_REF_TAG_CHECK_FAILURE: 2157 zfcp_scsi_dif_sense_error(scpnt, 0x3); 2158 goto skip_fsfstatus; 2159 } 2160 BUILD_BUG_ON(sizeof(struct fcp_resp_with_ext) > FSF_FCP_RSP_SIZE); 2161 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu; 2162 zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt); 2163 2164 skip_fsfstatus: 2165 zfcp_fsf_req_trace(req, scpnt); 2166 zfcp_dbf_scsi_result(scpnt, req); 2167 2168 scpnt->host_scribble = NULL; 2169 (scpnt->scsi_done) (scpnt); 2170 /* 2171 * We must hold this lock until scsi_done has been called. 2172 * Otherwise we may call scsi_done after abort regarding this 2173 * command has completed. 2174 * Note: scsi_done must not block! 2175 */ 2176 read_unlock_irqrestore(&req->adapter->abort_lock, flags); 2177 } 2178 2179 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir) 2180 { 2181 switch (scsi_get_prot_op(scsi_cmnd)) { 2182 case SCSI_PROT_NORMAL: 2183 switch (scsi_cmnd->sc_data_direction) { 2184 case DMA_NONE: 2185 *data_dir = FSF_DATADIR_CMND; 2186 break; 2187 case DMA_FROM_DEVICE: 2188 *data_dir = FSF_DATADIR_READ; 2189 break; 2190 case DMA_TO_DEVICE: 2191 *data_dir = FSF_DATADIR_WRITE; 2192 break; 2193 case DMA_BIDIRECTIONAL: 2194 return -EINVAL; 2195 } 2196 break; 2197 2198 case SCSI_PROT_READ_STRIP: 2199 *data_dir = FSF_DATADIR_DIF_READ_STRIP; 2200 break; 2201 case SCSI_PROT_WRITE_INSERT: 2202 *data_dir = FSF_DATADIR_DIF_WRITE_INSERT; 2203 break; 2204 case SCSI_PROT_READ_PASS: 2205 *data_dir = FSF_DATADIR_DIF_READ_CONVERT; 2206 break; 2207 case SCSI_PROT_WRITE_PASS: 2208 *data_dir = FSF_DATADIR_DIF_WRITE_CONVERT; 2209 break; 2210 default: 2211 return -EINVAL; 2212 } 2213 2214 return 0; 2215 } 2216 2217 /** 2218 * zfcp_fsf_fcp_cmnd - initiate an FCP command (for a SCSI command) 2219 * @scsi_cmnd: scsi command to be sent 2220 */ 2221 int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd) 2222 { 2223 struct zfcp_fsf_req *req; 2224 struct fcp_cmnd *fcp_cmnd; 2225 u8 sbtype = SBAL_SFLAGS0_TYPE_READ; 2226 int retval = -EIO; 2227 struct scsi_device *sdev = scsi_cmnd->device; 2228 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 2229 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; 2230 struct zfcp_qdio *qdio = adapter->qdio; 2231 struct fsf_qtcb_bottom_io *io; 2232 unsigned long flags; 2233 2234 if (unlikely(!(atomic_read(&zfcp_sdev->status) & 2235 ZFCP_STATUS_COMMON_UNBLOCKED))) 2236 return -EBUSY; 2237 2238 spin_lock_irqsave(&qdio->req_q_lock, flags); 2239 if (atomic_read(&qdio->req_q_free) <= 0) { 2240 atomic_inc(&qdio->req_q_full); 2241 goto out; 2242 } 2243 2244 if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) 2245 sbtype = SBAL_SFLAGS0_TYPE_WRITE; 2246 2247 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, 2248 sbtype, adapter->pool.scsi_req); 2249 2250 if (IS_ERR(req)) { 2251 retval = PTR_ERR(req); 2252 goto out; 2253 } 2254 2255 scsi_cmnd->host_scribble = (unsigned char *) req->req_id; 2256 2257 io = &req->qtcb->bottom.io; 2258 req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; 2259 req->data = scsi_cmnd; 2260 req->handler = zfcp_fsf_fcp_cmnd_handler; 2261 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 2262 req->qtcb->header.port_handle = zfcp_sdev->port->handle; 2263 io->service_class = FSF_CLASS_3; 2264 io->fcp_cmnd_length = FCP_CMND_LEN; 2265 2266 if (scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) { 2267 io->data_block_length = scsi_cmnd->device->sector_size; 2268 io->ref_tag_value = scsi_get_lba(scsi_cmnd) & 0xFFFFFFFF; 2269 } 2270 2271 if (zfcp_fsf_set_data_dir(scsi_cmnd, &io->data_direction)) 2272 goto failed_scsi_cmnd; 2273 2274 BUILD_BUG_ON(sizeof(struct fcp_cmnd) > FSF_FCP_CMND_SIZE); 2275 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu; 2276 zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd); 2277 2278 if ((scsi_get_prot_op(scsi_cmnd) != SCSI_PROT_NORMAL) && 2279 scsi_prot_sg_count(scsi_cmnd)) { 2280 zfcp_qdio_set_data_div(qdio, &req->qdio_req, 2281 scsi_prot_sg_count(scsi_cmnd)); 2282 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, 2283 scsi_prot_sglist(scsi_cmnd)); 2284 if (retval) 2285 goto failed_scsi_cmnd; 2286 io->prot_data_length = zfcp_qdio_real_bytes( 2287 scsi_prot_sglist(scsi_cmnd)); 2288 } 2289 2290 retval = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, 2291 scsi_sglist(scsi_cmnd)); 2292 if (unlikely(retval)) 2293 goto failed_scsi_cmnd; 2294 2295 zfcp_qdio_set_sbale_last(adapter->qdio, &req->qdio_req); 2296 if (zfcp_adapter_multi_buffer_active(adapter)) 2297 zfcp_qdio_set_scount(qdio, &req->qdio_req); 2298 2299 retval = zfcp_fsf_req_send(req); 2300 if (unlikely(retval)) 2301 goto failed_scsi_cmnd; 2302 2303 goto out; 2304 2305 failed_scsi_cmnd: 2306 zfcp_fsf_req_free(req); 2307 scsi_cmnd->host_scribble = NULL; 2308 out: 2309 spin_unlock_irqrestore(&qdio->req_q_lock, flags); 2310 return retval; 2311 } 2312 2313 static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req) 2314 { 2315 struct scsi_device *sdev = req->data; 2316 struct fcp_resp_with_ext *fcp_rsp; 2317 struct fcp_resp_rsp_info *rsp_info; 2318 2319 zfcp_fsf_fcp_handler_common(req, sdev); 2320 2321 fcp_rsp = &req->qtcb->bottom.io.fcp_rsp.iu; 2322 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1]; 2323 2324 if ((rsp_info->rsp_code != FCP_TMF_CMPL) || 2325 (req->status & ZFCP_STATUS_FSFREQ_ERROR)) 2326 req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; 2327 } 2328 2329 /** 2330 * zfcp_fsf_fcp_task_mgmt() - Send SCSI task management command (TMF). 2331 * @sdev: Pointer to SCSI device to send the task management command to. 2332 * @tm_flags: Unsigned byte for task management flags. 2333 * 2334 * Return: On success pointer to struct zfcp_fsf_req, %NULL otherwise. 2335 */ 2336 struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_device *sdev, 2337 u8 tm_flags) 2338 { 2339 struct zfcp_fsf_req *req = NULL; 2340 struct fcp_cmnd *fcp_cmnd; 2341 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); 2342 struct zfcp_qdio *qdio = zfcp_sdev->port->adapter->qdio; 2343 2344 if (unlikely(!(atomic_read(&zfcp_sdev->status) & 2345 ZFCP_STATUS_COMMON_UNBLOCKED))) 2346 return NULL; 2347 2348 spin_lock_irq(&qdio->req_q_lock); 2349 if (zfcp_qdio_sbal_get(qdio)) 2350 goto out; 2351 2352 req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, 2353 SBAL_SFLAGS0_TYPE_WRITE, 2354 qdio->adapter->pool.scsi_req); 2355 2356 if (IS_ERR(req)) { 2357 req = NULL; 2358 goto out; 2359 } 2360 2361 req->data = sdev; 2362 2363 req->handler = zfcp_fsf_fcp_task_mgmt_handler; 2364 req->qtcb->header.lun_handle = zfcp_sdev->lun_handle; 2365 req->qtcb->header.port_handle = zfcp_sdev->port->handle; 2366 req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; 2367 req->qtcb->bottom.io.service_class = FSF_CLASS_3; 2368 req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN; 2369 2370 zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); 2371 2372 fcp_cmnd = &req->qtcb->bottom.io.fcp_cmnd.iu; 2373 zfcp_fc_fcp_tm(fcp_cmnd, sdev, tm_flags); 2374 2375 zfcp_fsf_start_timer(req, ZFCP_FSF_SCSI_ER_TIMEOUT); 2376 if (!zfcp_fsf_req_send(req)) 2377 goto out; 2378 2379 zfcp_fsf_req_free(req); 2380 req = NULL; 2381 out: 2382 spin_unlock_irq(&qdio->req_q_lock); 2383 return req; 2384 } 2385 2386 /** 2387 * zfcp_fsf_reqid_check - validate req_id contained in SBAL returned by QDIO 2388 * @qdio: pointer to struct zfcp_qdio 2389 * @sbal_idx: response queue index of SBAL to be processed 2390 */ 2391 void zfcp_fsf_reqid_check(struct zfcp_qdio *qdio, int sbal_idx) 2392 { 2393 struct zfcp_adapter *adapter = qdio->adapter; 2394 struct qdio_buffer *sbal = qdio->res_q[sbal_idx]; 2395 struct qdio_buffer_element *sbale; 2396 struct zfcp_fsf_req *fsf_req; 2397 unsigned long req_id; 2398 int idx; 2399 2400 for (idx = 0; idx < QDIO_MAX_ELEMENTS_PER_BUFFER; idx++) { 2401 2402 sbale = &sbal->element[idx]; 2403 req_id = (unsigned long) sbale->addr; 2404 fsf_req = zfcp_reqlist_find_rm(adapter->req_list, req_id); 2405 2406 if (!fsf_req) { 2407 /* 2408 * Unknown request means that we have potentially memory 2409 * corruption and must stop the machine immediately. 2410 */ 2411 zfcp_qdio_siosl(adapter); 2412 panic("error: unknown req_id (%lx) on adapter %s.\n", 2413 req_id, dev_name(&adapter->ccw_device->dev)); 2414 } 2415 2416 zfcp_fsf_req_complete(fsf_req); 2417 2418 if (likely(sbale->eflags & SBAL_EFLAGS_LAST_ENTRY)) 2419 break; 2420 } 2421 } 2422