1 /* 2 * zfcp device driver 3 * 4 * Global definitions for the zfcp device driver. 5 * 6 * Copyright IBM Corporation 2002, 2008 7 */ 8 9 #ifndef ZFCP_DEF_H 10 #define ZFCP_DEF_H 11 12 /*************************** INCLUDES *****************************************/ 13 14 #include <linux/init.h> 15 #include <linux/moduleparam.h> 16 #include <linux/major.h> 17 #include <linux/blkdev.h> 18 #include <linux/delay.h> 19 #include <linux/timer.h> 20 #include <linux/slab.h> 21 #include <linux/mempool.h> 22 #include <linux/syscalls.h> 23 #include <linux/scatterlist.h> 24 #include <linux/ioctl.h> 25 #include <scsi/scsi.h> 26 #include <scsi/scsi_tcq.h> 27 #include <scsi/scsi_cmnd.h> 28 #include <scsi/scsi_device.h> 29 #include <scsi/scsi_host.h> 30 #include <scsi/scsi_transport.h> 31 #include <scsi/scsi_transport_fc.h> 32 #include <asm/ccwdev.h> 33 #include <asm/qdio.h> 34 #include <asm/debug.h> 35 #include <asm/ebcdic.h> 36 #include "zfcp_dbf.h" 37 #include "zfcp_fsf.h" 38 39 40 /********************* GENERAL DEFINES *********************************/ 41 42 /** 43 * zfcp_sg_to_address - determine kernel address from struct scatterlist 44 * @list: struct scatterlist 45 * Return: kernel address 46 */ 47 static inline void * 48 zfcp_sg_to_address(struct scatterlist *list) 49 { 50 return sg_virt(list); 51 } 52 53 /** 54 * zfcp_address_to_sg - set up struct scatterlist from kernel address 55 * @address: kernel address 56 * @list: struct scatterlist 57 * @size: buffer size 58 */ 59 static inline void 60 zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) 61 { 62 sg_set_buf(list, address, size); 63 } 64 65 #define REQUEST_LIST_SIZE 128 66 67 /********************* SCSI SPECIFIC DEFINES *********************************/ 68 #define ZFCP_SCSI_ER_TIMEOUT (10*HZ) 69 70 /********************* CIO/QDIO SPECIFIC DEFINES *****************************/ 71 72 /* Adapter Identification Parameters */ 73 #define ZFCP_CONTROL_UNIT_TYPE 0x1731 74 #define ZFCP_CONTROL_UNIT_MODEL 0x03 75 #define ZFCP_DEVICE_TYPE 0x1732 76 #define ZFCP_DEVICE_MODEL 0x03 77 #define ZFCP_DEVICE_MODEL_PRIV 0x04 78 79 /* DMQ bug workaround: don't use last SBALE */ 80 #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) 81 82 /* index of last SBALE (with respect to DMQ bug workaround) */ 83 #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) 84 85 /* max. number of (data buffer) SBALEs in largest SBAL chain */ 86 #define ZFCP_MAX_SBALES_PER_REQ \ 87 (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) 88 /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ 89 90 #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8) 91 /* max. number of (data buffer) SBALEs in largest SBAL chain 92 multiplied with number of sectors per 4k block */ 93 94 /********************* FSF SPECIFIC DEFINES *********************************/ 95 96 /* ATTENTION: value must not be used by hardware */ 97 #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 98 99 /* timeout value for "default timer" for fsf requests */ 100 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) 101 102 /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ 103 104 typedef unsigned long long wwn_t; 105 typedef unsigned long long fcp_lun_t; 106 /* data length field may be at variable position in FCP-2 FCP_CMND IU */ 107 typedef unsigned int fcp_dl_t; 108 109 /* timeout for name-server lookup (in seconds) */ 110 #define ZFCP_NS_GID_PN_TIMEOUT 10 111 112 /* task attribute values in FCP-2 FCP_CMND IU */ 113 #define SIMPLE_Q 0 114 #define HEAD_OF_Q 1 115 #define ORDERED_Q 2 116 #define ACA_Q 4 117 #define UNTAGGED 5 118 119 /* task management flags in FCP-2 FCP_CMND IU */ 120 #define FCP_CLEAR_ACA 0x40 121 #define FCP_TARGET_RESET 0x20 122 #define FCP_LOGICAL_UNIT_RESET 0x10 123 #define FCP_CLEAR_TASK_SET 0x04 124 #define FCP_ABORT_TASK_SET 0x02 125 126 #define FCP_CDB_LENGTH 16 127 128 #define ZFCP_DID_MASK 0x00FFFFFF 129 130 /* FCP(-2) FCP_CMND IU */ 131 struct fcp_cmnd_iu { 132 fcp_lun_t fcp_lun; /* FCP logical unit number */ 133 u8 crn; /* command reference number */ 134 u8 reserved0:5; /* reserved */ 135 u8 task_attribute:3; /* task attribute */ 136 u8 task_management_flags; /* task management flags */ 137 u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ 138 u8 rddata:1; /* read data */ 139 u8 wddata:1; /* write data */ 140 u8 fcp_cdb[FCP_CDB_LENGTH]; 141 } __attribute__((packed)); 142 143 /* FCP(-2) FCP_RSP IU */ 144 struct fcp_rsp_iu { 145 u8 reserved0[10]; 146 union { 147 struct { 148 u8 reserved1:3; 149 u8 fcp_conf_req:1; 150 u8 fcp_resid_under:1; 151 u8 fcp_resid_over:1; 152 u8 fcp_sns_len_valid:1; 153 u8 fcp_rsp_len_valid:1; 154 } bits; 155 u8 value; 156 } validity; 157 u8 scsi_status; 158 u32 fcp_resid; 159 u32 fcp_sns_len; 160 u32 fcp_rsp_len; 161 } __attribute__((packed)); 162 163 164 #define RSP_CODE_GOOD 0 165 #define RSP_CODE_LENGTH_MISMATCH 1 166 #define RSP_CODE_FIELD_INVALID 2 167 #define RSP_CODE_RO_MISMATCH 3 168 #define RSP_CODE_TASKMAN_UNSUPP 4 169 #define RSP_CODE_TASKMAN_FAILED 5 170 171 /* see fc-fs */ 172 #define LS_RSCN 0x61 173 #define LS_LOGO 0x05 174 #define LS_PLOGI 0x03 175 176 struct fcp_rscn_head { 177 u8 command; 178 u8 page_length; /* always 0x04 */ 179 u16 payload_len; 180 } __attribute__((packed)); 181 182 struct fcp_rscn_element { 183 u8 reserved:2; 184 u8 event_qual:4; 185 u8 addr_format:2; 186 u32 nport_did:24; 187 } __attribute__((packed)); 188 189 #define ZFCP_PORT_ADDRESS 0x0 190 #define ZFCP_AREA_ADDRESS 0x1 191 #define ZFCP_DOMAIN_ADDRESS 0x2 192 #define ZFCP_FABRIC_ADDRESS 0x3 193 194 #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF 195 #define ZFCP_PORTS_RANGE_AREA 0xFFFF00 196 #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 197 #define ZFCP_PORTS_RANGE_FABRIC 0x000000 198 199 #define ZFCP_NO_PORTS_PER_AREA 0x100 200 #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 201 #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 202 203 /* see fc-ph */ 204 struct fcp_logo { 205 u32 command; 206 u32 nport_did; 207 wwn_t nport_wwpn; 208 } __attribute__((packed)); 209 210 /* 211 * FC-FS stuff 212 */ 213 #define R_A_TOV 10 /* seconds */ 214 215 #define ZFCP_LS_RLS 0x0f 216 #define ZFCP_LS_ADISC 0x52 217 #define ZFCP_LS_RPS 0x56 218 #define ZFCP_LS_RSCN 0x61 219 #define ZFCP_LS_RNID 0x78 220 221 struct zfcp_ls_rjt_par { 222 u8 action; 223 u8 reason_code; 224 u8 reason_expl; 225 u8 vendor_unique; 226 } __attribute__ ((packed)); 227 228 struct zfcp_ls_adisc { 229 u8 code; 230 u8 field[3]; 231 u32 hard_nport_id; 232 u64 wwpn; 233 u64 wwnn; 234 u32 nport_id; 235 } __attribute__ ((packed)); 236 237 struct zfcp_ls_adisc_acc { 238 u8 code; 239 u8 field[3]; 240 u32 hard_nport_id; 241 u64 wwpn; 242 u64 wwnn; 243 u32 nport_id; 244 } __attribute__ ((packed)); 245 246 struct zfcp_rc_entry { 247 u8 code; 248 const char *description; 249 }; 250 251 /* 252 * FC-GS-2 stuff 253 */ 254 #define ZFCP_CT_REVISION 0x01 255 #define ZFCP_CT_DIRECTORY_SERVICE 0xFC 256 #define ZFCP_CT_NAME_SERVER 0x02 257 #define ZFCP_CT_SYNCHRONOUS 0x00 258 #define ZFCP_CT_SCSI_FCP 0x08 259 #define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09 260 #define ZFCP_CT_GID_PN 0x0121 261 #define ZFCP_CT_GPN_FT 0x0172 262 #define ZFCP_CT_MAX_SIZE 0x1020 263 #define ZFCP_CT_ACCEPT 0x8002 264 #define ZFCP_CT_REJECT 0x8001 265 266 /* 267 * FC-GS-4 stuff 268 */ 269 #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) 270 271 /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ 272 273 /* 274 * Note, the leftmost status byte is common among adapter, port 275 * and unit 276 */ 277 #define ZFCP_COMMON_FLAGS 0xfff00000 278 279 /* common status bits */ 280 #define ZFCP_STATUS_COMMON_REMOVE 0x80000000 281 #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 282 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 283 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 284 #define ZFCP_STATUS_COMMON_OPENING 0x08000000 285 #define ZFCP_STATUS_COMMON_OPEN 0x04000000 286 #define ZFCP_STATUS_COMMON_CLOSING 0x02000000 287 #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 288 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 289 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 290 #define ZFCP_STATUS_COMMON_NOESC 0x00200000 291 292 /* adapter status */ 293 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 294 #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 295 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 296 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 297 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020 298 #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080 299 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 300 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 301 #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800 302 303 /* FC-PH/FC-GS well-known address identifiers for generic services */ 304 #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA 305 #define ZFCP_DID_TIME_SERVICE 0xFFFFFB 306 #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC 307 #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8 308 #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7 309 310 /* remote port status */ 311 #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 312 #define ZFCP_STATUS_PORT_DID_DID 0x00000002 313 #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004 314 #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 315 #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010 316 #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 317 318 /* for ports with well known addresses */ 319 #define ZFCP_STATUS_PORT_WKA \ 320 (ZFCP_STATUS_PORT_NO_WWPN | \ 321 ZFCP_STATUS_PORT_NO_SCSI_ID) 322 323 /* logical unit status */ 324 #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002 325 #define ZFCP_STATUS_UNIT_SHARED 0x00000004 326 #define ZFCP_STATUS_UNIT_READONLY 0x00000008 327 #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010 328 #define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020 329 330 /* FSF request status (this does not have a common part) */ 331 #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000 332 #define ZFCP_STATUS_FSFREQ_POOL 0x00000001 333 #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 334 #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004 335 #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 336 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 337 #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020 338 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 339 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 340 #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100 341 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 342 #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400 343 #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 344 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 345 346 /************************* STRUCTURE DEFINITIONS *****************************/ 347 348 struct zfcp_fsf_req; 349 350 /* holds various memory pools of an adapter */ 351 struct zfcp_adapter_mempool { 352 mempool_t *fsf_req_erp; 353 mempool_t *fsf_req_scsi; 354 mempool_t *fsf_req_abort; 355 mempool_t *fsf_req_status_read; 356 mempool_t *data_status_read; 357 mempool_t *data_gid_pn; 358 }; 359 360 /* 361 * header for CT_IU 362 */ 363 struct ct_hdr { 364 u8 revision; // 0x01 365 u8 in_id[3]; // 0x00 366 u8 gs_type; // 0xFC Directory Service 367 u8 gs_subtype; // 0x02 Name Server 368 u8 options; // 0x00 single bidirectional exchange 369 u8 reserved0; 370 u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT 371 u16 max_res_size; // <= (4096 - 16) / 4 372 u8 reserved1; 373 u8 reason_code; 374 u8 reason_code_expl; 375 u8 vendor_unique; 376 } __attribute__ ((packed)); 377 378 /* nameserver request CT_IU -- for requests where 379 * a port name is required */ 380 struct ct_iu_gid_pn_req { 381 struct ct_hdr header; 382 wwn_t wwpn; 383 } __attribute__ ((packed)); 384 385 /* FS_ACC IU and data unit for GID_PN nameserver request */ 386 struct ct_iu_gid_pn_resp { 387 struct ct_hdr header; 388 u32 d_id; 389 } __attribute__ ((packed)); 390 391 typedef void (*zfcp_send_ct_handler_t)(unsigned long); 392 393 /** 394 * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct 395 * @port: port where the request is sent to 396 * @req: scatter-gather list for request 397 * @resp: scatter-gather list for response 398 * @req_count: number of elements in request scatter-gather list 399 * @resp_count: number of elements in response scatter-gather list 400 * @handler: handler function (called for response to the request) 401 * @handler_data: data passed to handler function 402 * @timeout: FSF timeout for this request 403 * @completion: completion for synchronization purposes 404 * @status: used to pass error status to calling function 405 */ 406 struct zfcp_send_ct { 407 struct zfcp_port *port; 408 struct scatterlist *req; 409 struct scatterlist *resp; 410 unsigned int req_count; 411 unsigned int resp_count; 412 zfcp_send_ct_handler_t handler; 413 unsigned long handler_data; 414 int timeout; 415 struct completion *completion; 416 int status; 417 }; 418 419 /* used for name server requests in error recovery */ 420 struct zfcp_gid_pn_data { 421 struct zfcp_send_ct ct; 422 struct scatterlist req; 423 struct scatterlist resp; 424 struct ct_iu_gid_pn_req ct_iu_req; 425 struct ct_iu_gid_pn_resp ct_iu_resp; 426 struct zfcp_port *port; 427 }; 428 429 typedef void (*zfcp_send_els_handler_t)(unsigned long); 430 431 /** 432 * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els 433 * @adapter: adapter where request is sent from 434 * @port: port where ELS is destinated (port reference count has to be increased) 435 * @d_id: destiniation id of port where request is sent to 436 * @req: scatter-gather list for request 437 * @resp: scatter-gather list for response 438 * @req_count: number of elements in request scatter-gather list 439 * @resp_count: number of elements in response scatter-gather list 440 * @handler: handler function (called for response to the request) 441 * @handler_data: data passed to handler function 442 * @completion: completion for synchronization purposes 443 * @ls_code: hex code of ELS command 444 * @status: used to pass error status to calling function 445 */ 446 struct zfcp_send_els { 447 struct zfcp_adapter *adapter; 448 struct zfcp_port *port; 449 u32 d_id; 450 struct scatterlist *req; 451 struct scatterlist *resp; 452 unsigned int req_count; 453 unsigned int resp_count; 454 zfcp_send_els_handler_t handler; 455 unsigned long handler_data; 456 struct completion *completion; 457 int ls_code; 458 int status; 459 }; 460 461 struct zfcp_qdio_queue { 462 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ 463 u8 first; /* index of next free bfr 464 in queue (free_count>0) */ 465 atomic_t count; /* number of free buffers 466 in queue */ 467 spinlock_t lock; /* lock for operations on queue */ 468 int pci_batch; /* SBALs since PCI indication 469 was last set */ 470 }; 471 472 struct zfcp_erp_action { 473 struct list_head list; 474 int action; /* requested action code */ 475 struct zfcp_adapter *adapter; /* device which should be recovered */ 476 struct zfcp_port *port; 477 struct zfcp_unit *unit; 478 volatile u32 status; /* recovery status */ 479 u32 step; /* active step of this erp action */ 480 struct zfcp_fsf_req *fsf_req; /* fsf request currently pending 481 for this action */ 482 struct timer_list timer; 483 }; 484 485 struct fsf_latency_record { 486 u32 min; 487 u32 max; 488 u64 sum; 489 }; 490 491 struct latency_cont { 492 struct fsf_latency_record channel; 493 struct fsf_latency_record fabric; 494 u64 counter; 495 }; 496 497 struct zfcp_latencies { 498 struct latency_cont read; 499 struct latency_cont write; 500 struct latency_cont cmd; 501 spinlock_t lock; 502 }; 503 504 struct zfcp_adapter { 505 struct list_head list; /* list of adapters */ 506 atomic_t refcount; /* reference count */ 507 wait_queue_head_t remove_wq; /* can be used to wait for 508 refcount drop to zero */ 509 wwn_t peer_wwnn; /* P2P peer WWNN */ 510 wwn_t peer_wwpn; /* P2P peer WWPN */ 511 u32 peer_d_id; /* P2P peer D_ID */ 512 struct ccw_device *ccw_device; /* S/390 ccw device */ 513 u32 hydra_version; /* Hydra version */ 514 u32 fsf_lic_version; 515 u32 adapter_features; /* FCP channel features */ 516 u32 connection_features; /* host connection features */ 517 u32 hardware_version; /* of FCP channel */ 518 u16 timer_ticks; /* time int for a tick */ 519 struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ 520 struct list_head port_list_head; /* remote port list */ 521 struct list_head port_remove_lh; /* head of ports to be 522 removed */ 523 u32 ports; /* number of remote ports */ 524 unsigned long req_no; /* unique FSF req number */ 525 struct list_head *req_list; /* list of pending reqs */ 526 spinlock_t req_list_lock; /* request list lock */ 527 struct zfcp_qdio_queue req_q; /* request queue */ 528 u32 fsf_req_seq_no; /* FSF cmnd seq number */ 529 wait_queue_head_t request_wq; /* can be used to wait for 530 more avaliable SBALs */ 531 struct zfcp_qdio_queue resp_q; /* response queue */ 532 rwlock_t abort_lock; /* Protects against SCSI 533 stack abort/command 534 completion races */ 535 atomic_t stat_miss; /* # missing status reads*/ 536 struct work_struct stat_work; 537 atomic_t status; /* status of this adapter */ 538 struct list_head erp_ready_head; /* error recovery for this 539 adapter/devices */ 540 struct list_head erp_running_head; 541 rwlock_t erp_lock; 542 struct semaphore erp_ready_sem; 543 wait_queue_head_t erp_thread_wqh; 544 wait_queue_head_t erp_done_wqh; 545 struct zfcp_erp_action erp_action; /* pending error recovery */ 546 atomic_t erp_counter; 547 u32 erp_total_count; /* total nr of enqueued erp 548 actions */ 549 u32 erp_low_mem_count; /* nr of erp actions waiting 550 for memory */ 551 struct zfcp_port *nameserver_port; /* adapter's nameserver */ 552 debug_info_t *rec_dbf; 553 debug_info_t *hba_dbf; 554 debug_info_t *san_dbf; /* debug feature areas */ 555 debug_info_t *scsi_dbf; 556 spinlock_t rec_dbf_lock; 557 spinlock_t hba_dbf_lock; 558 spinlock_t san_dbf_lock; 559 spinlock_t scsi_dbf_lock; 560 struct zfcp_rec_dbf_record rec_dbf_buf; 561 struct zfcp_hba_dbf_record hba_dbf_buf; 562 struct zfcp_san_dbf_record san_dbf_buf; 563 struct zfcp_scsi_dbf_record scsi_dbf_buf; 564 struct zfcp_adapter_mempool pool; /* Adapter memory pools */ 565 struct qdio_initialize qdio_init_data; /* for qdio_establish */ 566 struct device generic_services; /* directory for WKA ports */ 567 struct fc_host_statistics *fc_stats; 568 struct fsf_qtcb_bottom_port *stats_reset_data; 569 unsigned long stats_reset; 570 struct work_struct scan_work; 571 }; 572 573 struct zfcp_port { 574 struct device sysfs_device; /* sysfs device */ 575 struct fc_rport *rport; /* rport of fc transport class */ 576 struct list_head list; /* list of remote ports */ 577 atomic_t refcount; /* reference count */ 578 wait_queue_head_t remove_wq; /* can be used to wait for 579 refcount drop to zero */ 580 struct zfcp_adapter *adapter; /* adapter used to access port */ 581 struct list_head unit_list_head; /* head of logical unit list */ 582 struct list_head unit_remove_lh; /* head of luns to be removed 583 list */ 584 u32 units; /* # of logical units in list */ 585 atomic_t status; /* status of this remote port */ 586 wwn_t wwnn; /* WWNN if known */ 587 wwn_t wwpn; /* WWPN */ 588 u32 d_id; /* D_ID */ 589 u32 handle; /* handle assigned by FSF */ 590 struct zfcp_erp_action erp_action; /* pending error recovery */ 591 atomic_t erp_counter; 592 u32 maxframe_size; 593 u32 supported_classes; 594 }; 595 596 struct zfcp_unit { 597 struct device sysfs_device; /* sysfs device */ 598 struct list_head list; /* list of logical units */ 599 atomic_t refcount; /* reference count */ 600 wait_queue_head_t remove_wq; /* can be used to wait for 601 refcount drop to zero */ 602 struct zfcp_port *port; /* remote port of unit */ 603 atomic_t status; /* status of this logical unit */ 604 unsigned int scsi_lun; /* own SCSI LUN */ 605 fcp_lun_t fcp_lun; /* own FCP_LUN */ 606 u32 handle; /* handle assigned by FSF */ 607 struct scsi_device *device; /* scsi device struct pointer */ 608 struct zfcp_erp_action erp_action; /* pending error recovery */ 609 atomic_t erp_counter; 610 struct zfcp_latencies latencies; 611 }; 612 613 /* FSF request */ 614 struct zfcp_fsf_req { 615 struct list_head list; /* list of FSF requests */ 616 unsigned long req_id; /* unique request ID */ 617 struct zfcp_adapter *adapter; /* adapter request belongs to */ 618 u8 sbal_number; /* nr of SBALs free for use */ 619 u8 sbal_first; /* first SBAL for this request */ 620 u8 sbal_last; /* last SBAL for this request */ 621 u8 sbal_limit; /* last possible SBAL for 622 this reuest */ 623 u8 sbale_curr; /* current SBALE during creation 624 of request */ 625 u8 sbal_response; /* SBAL used in interrupt */ 626 wait_queue_head_t completion_wq; /* can be used by a routine 627 to wait for completion */ 628 volatile u32 status; /* status of this request */ 629 u32 fsf_command; /* FSF Command copy */ 630 struct fsf_qtcb *qtcb; /* address of associated QTCB */ 631 u32 seq_no; /* Sequence number of request */ 632 void *data; /* private data of request */ 633 struct timer_list timer; /* used for erp or scsi er */ 634 struct zfcp_erp_action *erp_action; /* used if this request is 635 issued on behalf of erp */ 636 mempool_t *pool; /* used if request was alloacted 637 from emergency pool */ 638 unsigned long long issued; /* request sent time (STCK) */ 639 struct zfcp_unit *unit; 640 void (*handler)(struct zfcp_fsf_req *); 641 }; 642 643 /* driver data */ 644 struct zfcp_data { 645 struct scsi_host_template scsi_host_template; 646 struct scsi_transport_template *scsi_transport_template; 647 atomic_t status; /* Module status flags */ 648 struct list_head adapter_list_head; /* head of adapter list */ 649 struct list_head adapter_remove_lh; /* head of adapters to be 650 removed */ 651 u32 adapters; /* # of adapters in list */ 652 rwlock_t config_lock; /* serialises changes 653 to adapter/port/unit 654 lists */ 655 struct semaphore config_sema; /* serialises configuration 656 changes */ 657 atomic_t loglevel; /* current loglevel */ 658 char init_busid[BUS_ID_SIZE]; 659 wwn_t init_wwpn; 660 fcp_lun_t init_fcp_lun; 661 struct kmem_cache *fsf_req_qtcb_cache; 662 struct kmem_cache *sr_buffer_cache; 663 struct kmem_cache *gid_pn_cache; 664 }; 665 666 /* struct used by memory pools for fsf_requests */ 667 struct zfcp_fsf_req_qtcb { 668 struct zfcp_fsf_req fsf_req; 669 struct fsf_qtcb qtcb; 670 }; 671 672 /********************** ZFCP SPECIFIC DEFINES ********************************/ 673 674 #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 675 #define ZFCP_REQ_NO_QTCB 0x00000008 676 677 #define ZFCP_SET 0x00000100 678 #define ZFCP_CLEAR 0x00000200 679 680 #ifndef atomic_test_mask 681 #define atomic_test_mask(mask, target) \ 682 ((atomic_read(target) & mask) == mask) 683 #endif 684 685 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) 686 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) 687 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) 688 689 /* 690 * Helper functions for request ID management. 691 */ 692 static inline int zfcp_reqlist_hash(unsigned long req_id) 693 { 694 return req_id % REQUEST_LIST_SIZE; 695 } 696 697 static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter, 698 struct zfcp_fsf_req *fsf_req) 699 { 700 list_del(&fsf_req->list); 701 } 702 703 static inline struct zfcp_fsf_req * 704 zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id) 705 { 706 struct zfcp_fsf_req *request; 707 unsigned int idx; 708 709 idx = zfcp_reqlist_hash(req_id); 710 list_for_each_entry(request, &adapter->req_list[idx], list) 711 if (request->req_id == req_id) 712 return request; 713 return NULL; 714 } 715 716 static inline struct zfcp_fsf_req * 717 zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req) 718 { 719 struct zfcp_fsf_req *request; 720 unsigned int idx; 721 722 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) { 723 list_for_each_entry(request, &adapter->req_list[idx], list) 724 if (request == req) 725 return request; 726 } 727 return NULL; 728 } 729 730 /* 731 * functions needed for reference/usage counting 732 */ 733 734 static inline void 735 zfcp_unit_get(struct zfcp_unit *unit) 736 { 737 atomic_inc(&unit->refcount); 738 } 739 740 static inline void 741 zfcp_unit_put(struct zfcp_unit *unit) 742 { 743 if (atomic_dec_return(&unit->refcount) == 0) 744 wake_up(&unit->remove_wq); 745 } 746 747 static inline void 748 zfcp_unit_wait(struct zfcp_unit *unit) 749 { 750 wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); 751 } 752 753 static inline void 754 zfcp_port_get(struct zfcp_port *port) 755 { 756 atomic_inc(&port->refcount); 757 } 758 759 static inline void 760 zfcp_port_put(struct zfcp_port *port) 761 { 762 if (atomic_dec_return(&port->refcount) == 0) 763 wake_up(&port->remove_wq); 764 } 765 766 static inline void 767 zfcp_port_wait(struct zfcp_port *port) 768 { 769 wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); 770 } 771 772 static inline void 773 zfcp_adapter_get(struct zfcp_adapter *adapter) 774 { 775 atomic_inc(&adapter->refcount); 776 } 777 778 static inline void 779 zfcp_adapter_put(struct zfcp_adapter *adapter) 780 { 781 if (atomic_dec_return(&adapter->refcount) == 0) 782 wake_up(&adapter->remove_wq); 783 } 784 785 static inline void 786 zfcp_adapter_wait(struct zfcp_adapter *adapter) 787 { 788 wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); 789 } 790 791 #endif /* ZFCP_DEF_H */ 792