projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 4a9d2d8b AH |
2 | * This file is part of the zfcp device driver for |
| 3 | * FCP adapters for IBM System z9 and zSeries. | |
| 1da177e4 | 4 | * |
| 4a9d2d8b | 5 | * (C) Copyright IBM Corp. 2002, 2006 |
| 1da177e4 LT |
6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2, or (at your option) | |
| 10 | * any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 20 | */ | |
| 21 | ||
| 22 | ||
| 23 | #ifndef ZFCP_DEF_H | |
| 24 | #define ZFCP_DEF_H | |
| 25 | ||
| 1da177e4 LT |
26 | /*************************** INCLUDES *****************************************/ |
| 27 | ||
| 28 | #include <linux/init.h> | |
| 29 | #include <linux/moduleparam.h> | |
| 30 | #include <linux/miscdevice.h> | |
| 31 | #include <linux/major.h> | |
| 32 | #include <linux/blkdev.h> | |
| 33 | #include <linux/delay.h> | |
| 34 | #include <linux/timer.h> | |
| 35 | #include <scsi/scsi.h> | |
| 36 | #include <scsi/scsi_tcq.h> | |
| 37 | #include <scsi/scsi_cmnd.h> | |
| 38 | #include <scsi/scsi_device.h> | |
| 39 | #include <scsi/scsi_host.h> | |
| 40 | #include <scsi/scsi_transport.h> | |
| 41 | #include <scsi/scsi_transport_fc.h> | |
| 1da177e4 LT |
42 | #include "zfcp_fsf.h" |
| 43 | #include <asm/ccwdev.h> | |
| 44 | #include <asm/qdio.h> | |
| 45 | #include <asm/debug.h> | |
| 46 | #include <asm/ebcdic.h> | |
| 47 | #include <linux/mempool.h> | |
| 48 | #include <linux/syscalls.h> | |
| 49 | #include <linux/ioctl.h> | |
| 1da177e4 | 50 | |
| 1da177e4 LT |
51 | |
| 52 | /********************* GENERAL DEFINES *********************************/ | |
| 53 | ||
| 54 | /* zfcp version number, it consists of major, minor, and patch-level number */ | |
| 93ef5887 | 55 | #define ZFCP_VERSION "4.7.0" |
| 1da177e4 LT |
56 | |
| 57 | /** | |
| 58 | * zfcp_sg_to_address - determine kernel address from struct scatterlist | |
| 59 | * @list: struct scatterlist | |
| 60 | * Return: kernel address | |
| 61 | */ | |
| 62 | static inline void * | |
| 63 | zfcp_sg_to_address(struct scatterlist *list) | |
| 64 | { | |
| 65 | return (void *) (page_address(list->page) + list->offset); | |
| 66 | } | |
| 67 | ||
| 68 | /** | |
| 69 | * zfcp_address_to_sg - set up struct scatterlist from kernel address | |
| 70 | * @address: kernel address | |
| 71 | * @list: struct scatterlist | |
| 72 | */ | |
| 73 | static inline void | |
| 74 | zfcp_address_to_sg(void *address, struct scatterlist *list) | |
| 75 | { | |
| 76 | list->page = virt_to_page(address); | |
| 77 | list->offset = ((unsigned long) address) & (PAGE_SIZE - 1); | |
| 78 | } | |
| 79 | ||
| 06506d00 | 80 | #define REQUEST_LIST_SIZE 128 |
| 1da177e4 | 81 | |
| 06506d00 | 82 | /********************* SCSI SPECIFIC DEFINES *********************************/ |
| 1da177e4 LT |
83 | #define ZFCP_SCSI_ER_TIMEOUT (100*HZ) |
| 84 | ||
| 85 | /********************* CIO/QDIO SPECIFIC DEFINES *****************************/ | |
| 86 | ||
| 87 | /* Adapter Identification Parameters */ | |
| 88 | #define ZFCP_CONTROL_UNIT_TYPE 0x1731 | |
| 89 | #define ZFCP_CONTROL_UNIT_MODEL 0x03 | |
| 90 | #define ZFCP_DEVICE_TYPE 0x1732 | |
| 91 | #define ZFCP_DEVICE_MODEL 0x03 | |
| 92 | #define ZFCP_DEVICE_MODEL_PRIV 0x04 | |
| 93 | ||
| 94 | /* allow as many chained SBALs as are supported by hardware */ | |
| 95 | #define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ | |
| 96 | #define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ | |
| 97 | #define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ | |
| 98 | ||
| 99 | /* DMQ bug workaround: don't use last SBALE */ | |
| 100 | #define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) | |
| 101 | ||
| 102 | /* index of last SBALE (with respect to DMQ bug workaround) */ | |
| 103 | #define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) | |
| 104 | ||
| 105 | /* max. number of (data buffer) SBALEs in largest SBAL chain */ | |
| 106 | #define ZFCP_MAX_SBALES_PER_REQ \ | |
| 107 | (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) | |
| 108 | /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ | |
| 109 | ||
| 110 | /* FIXME(tune): free space should be one max. SBAL chain plus what? */ | |
| 111 | #define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ | |
| 112 | - (ZFCP_MAX_SBALS_PER_REQ + 4)) | |
| 113 | ||
| 114 | #define ZFCP_SBAL_TIMEOUT (5*HZ) | |
| 115 | ||
| 116 | #define ZFCP_TYPE2_RECOVERY_TIME (8*HZ) | |
| 117 | ||
| 118 | /* queue polling (values in microseconds) */ | |
| 119 | #define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ | |
| 120 | #define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ | |
| 121 | #define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ | |
| 122 | #define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ | |
| 123 | ||
| 124 | #define QDIO_SCSI_QFMT 1 /* 1 for FSF */ | |
| 125 | ||
| 126 | /********************* FSF SPECIFIC DEFINES *********************************/ | |
| 127 | ||
| 128 | #define ZFCP_ULP_INFO_VERSION 26 | |
| 129 | #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION | |
| 130 | /* ATTENTION: value must not be used by hardware */ | |
| 131 | #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 | |
| 132 | #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 | |
| 133 | #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM | |
| 22753fa5 AH |
134 | |
| 135 | /* Do 1st retry in 1 second, then double the timeout for each following retry */ | |
| 136 | #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100 | |
| 137 | #define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 | |
| 1da177e4 LT |
138 | |
| 139 | /* timeout value for "default timer" for fsf requests */ | |
| 140 | #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ); | |
| 141 | ||
| 142 | /*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ | |
| 143 | ||
| 144 | typedef unsigned long long wwn_t; | |
| 1da177e4 LT |
145 | typedef unsigned long long fcp_lun_t; |
| 146 | /* data length field may be at variable position in FCP-2 FCP_CMND IU */ | |
| 147 | typedef unsigned int fcp_dl_t; | |
| 148 | ||
| 149 | #define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 | |
| 150 | ||
| 151 | /* timeout for name-server lookup (in seconds) */ | |
| 152 | #define ZFCP_NS_GID_PN_TIMEOUT 10 | |
| 153 | ||
| 154 | /* largest SCSI command we can process */ | |
| 155 | /* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ | |
| 156 | #define ZFCP_MAX_SCSI_CMND_LENGTH 255 | |
| 157 | /* maximum number of commands in LUN queue (tagged queueing) */ | |
| 158 | #define ZFCP_CMND_PER_LUN 32 | |
| 159 | ||
| 160 | /* task attribute values in FCP-2 FCP_CMND IU */ | |
| 161 | #define SIMPLE_Q 0 | |
| 162 | #define HEAD_OF_Q 1 | |
| 163 | #define ORDERED_Q 2 | |
| 164 | #define ACA_Q 4 | |
| 165 | #define UNTAGGED 5 | |
| 166 | ||
| 167 | /* task management flags in FCP-2 FCP_CMND IU */ | |
| 168 | #define FCP_CLEAR_ACA 0x40 | |
| 169 | #define FCP_TARGET_RESET 0x20 | |
| 170 | #define FCP_LOGICAL_UNIT_RESET 0x10 | |
| 171 | #define FCP_CLEAR_TASK_SET 0x04 | |
| 172 | #define FCP_ABORT_TASK_SET 0x02 | |
| 173 | ||
| 174 | #define FCP_CDB_LENGTH 16 | |
| 175 | ||
| 176 | #define ZFCP_DID_MASK 0x00FFFFFF | |
| 177 | ||
| 178 | /* FCP(-2) FCP_CMND IU */ | |
| 179 | struct fcp_cmnd_iu { | |
| 180 | fcp_lun_t fcp_lun; /* FCP logical unit number */ | |
| 181 | u8 crn; /* command reference number */ | |
| 182 | u8 reserved0:5; /* reserved */ | |
| 183 | u8 task_attribute:3; /* task attribute */ | |
| 184 | u8 task_management_flags; /* task management flags */ | |
| 185 | u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ | |
| 186 | u8 rddata:1; /* read data */ | |
| 187 | u8 wddata:1; /* write data */ | |
| 188 | u8 fcp_cdb[FCP_CDB_LENGTH]; | |
| 189 | } __attribute__((packed)); | |
| 190 | ||
| 191 | /* FCP(-2) FCP_RSP IU */ | |
| 192 | struct fcp_rsp_iu { | |
| 193 | u8 reserved0[10]; | |
| 194 | union { | |
| 195 | struct { | |
| 196 | u8 reserved1:3; | |
| 197 | u8 fcp_conf_req:1; | |
| 198 | u8 fcp_resid_under:1; | |
| 199 | u8 fcp_resid_over:1; | |
| 200 | u8 fcp_sns_len_valid:1; | |
| 201 | u8 fcp_rsp_len_valid:1; | |
| 202 | } bits; | |
| 203 | u8 value; | |
| 204 | } validity; | |
| 205 | u8 scsi_status; | |
| 206 | u32 fcp_resid; | |
| 207 | u32 fcp_sns_len; | |
| 208 | u32 fcp_rsp_len; | |
| 209 | } __attribute__((packed)); | |
| 210 | ||
| 211 | ||
| 212 | #define RSP_CODE_GOOD 0 | |
| 213 | #define RSP_CODE_LENGTH_MISMATCH 1 | |
| 214 | #define RSP_CODE_FIELD_INVALID 2 | |
| 215 | #define RSP_CODE_RO_MISMATCH 3 | |
| 216 | #define RSP_CODE_TASKMAN_UNSUPP 4 | |
| 217 | #define RSP_CODE_TASKMAN_FAILED 5 | |
| 218 | ||
| 219 | /* see fc-fs */ | |
| 06506d00 AH |
220 | #define LS_RSCN 0x61040000 |
| 221 | #define LS_LOGO 0x05000000 | |
| 222 | #define LS_PLOGI 0x03000000 | |
| 1da177e4 LT |
223 | |
| 224 | struct fcp_rscn_head { | |
| 225 | u8 command; | |
| 226 | u8 page_length; /* always 0x04 */ | |
| 227 | u16 payload_len; | |
| 228 | } __attribute__((packed)); | |
| 229 | ||
| 230 | struct fcp_rscn_element { | |
| 231 | u8 reserved:2; | |
| 232 | u8 event_qual:4; | |
| 233 | u8 addr_format:2; | |
| 234 | u32 nport_did:24; | |
| 235 | } __attribute__((packed)); | |
| 236 | ||
| 237 | #define ZFCP_PORT_ADDRESS 0x0 | |
| 238 | #define ZFCP_AREA_ADDRESS 0x1 | |
| 239 | #define ZFCP_DOMAIN_ADDRESS 0x2 | |
| 240 | #define ZFCP_FABRIC_ADDRESS 0x3 | |
| 241 | ||
| 242 | #define ZFCP_PORTS_RANGE_PORT 0xFFFFFF | |
| 243 | #define ZFCP_PORTS_RANGE_AREA 0xFFFF00 | |
| 244 | #define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 | |
| 245 | #define ZFCP_PORTS_RANGE_FABRIC 0x000000 | |
| 246 | ||
| 247 | #define ZFCP_NO_PORTS_PER_AREA 0x100 | |
| 248 | #define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 | |
| 249 | #define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 | |
| 250 | ||
| 1da177e4 LT |
251 | /* see fc-ph */ |
| 252 | struct fcp_logo { | |
| 253 | u32 command; | |
| 254 | u32 nport_did; | |
| 255 | wwn_t nport_wwpn; | |
| 256 | } __attribute__((packed)); | |
| 257 | ||
| 8a36e453 MS |
258 | /* |
| 259 | * DBF stuff | |
| 260 | */ | |
| 261 | #define ZFCP_DBF_TAG_SIZE 4 | |
| 262 | ||
| 263 | struct zfcp_dbf_dump { | |
| 264 | u8 tag[ZFCP_DBF_TAG_SIZE]; | |
| 265 | u32 total_size; /* size of total dump data */ | |
| 266 | u32 offset; /* how much data has being already dumped */ | |
| 267 | u32 size; /* how much data comes with this record */ | |
| 268 | u8 data[]; /* dump data */ | |
| 269 | } __attribute__ ((packed)); | |
| 270 | ||
| 271 | /* FIXME: to be inflated when reworking the erp dbf */ | |
| 272 | struct zfcp_erp_dbf_record { | |
| 273 | u8 dummy[16]; | |
| 274 | } __attribute__ ((packed)); | |
| 275 | ||
| 276 | struct zfcp_hba_dbf_record_response { | |
| 277 | u32 fsf_command; | |
| 278 | u64 fsf_reqid; | |
| 279 | u32 fsf_seqno; | |
| 280 | u64 fsf_issued; | |
| 281 | u32 fsf_prot_status; | |
| 282 | u32 fsf_status; | |
| 283 | u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE]; | |
| 284 | u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; | |
| 285 | u32 fsf_req_status; | |
| 286 | u8 sbal_first; | |
| 287 | u8 sbal_curr; | |
| 288 | u8 sbal_last; | |
| 289 | u8 pool; | |
| 290 | u64 erp_action; | |
| 291 | union { | |
| 292 | struct { | |
| 293 | u64 scsi_cmnd; | |
| 294 | u64 scsi_serial; | |
| 295 | } send_fcp; | |
| 296 | struct { | |
| 297 | u64 wwpn; | |
| 298 | u32 d_id; | |
| 299 | u32 port_handle; | |
| 300 | } port; | |
| 301 | struct { | |
| 302 | u64 wwpn; | |
| 303 | u64 fcp_lun; | |
| 304 | u32 port_handle; | |
| 305 | u32 lun_handle; | |
| 306 | } unit; | |
| 307 | struct { | |
| 308 | u32 d_id; | |
| 309 | u8 ls_code; | |
| 310 | } send_els; | |
| 311 | } data; | |
| 312 | } __attribute__ ((packed)); | |
| 313 | ||
| 314 | struct zfcp_hba_dbf_record_status { | |
| 315 | u8 failed; | |
| 316 | u32 status_type; | |
| 317 | u32 status_subtype; | |
| 318 | struct fsf_queue_designator | |
| 319 | queue_designator; | |
| 320 | u32 payload_size; | |
| 321 | #define ZFCP_DBF_UNSOL_PAYLOAD 80 | |
| 322 | #define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32 | |
| 323 | #define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56 | |
| 324 | #define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32) | |
| 325 | u8 payload[ZFCP_DBF_UNSOL_PAYLOAD]; | |
| 326 | } __attribute__ ((packed)); | |
| 327 | ||
| 328 | struct zfcp_hba_dbf_record_qdio { | |
| 329 | u32 status; | |
| 330 | u32 qdio_error; | |
| 331 | u32 siga_error; | |
| 332 | u8 sbal_index; | |
| 333 | u8 sbal_count; | |
| 334 | } __attribute__ ((packed)); | |
| 335 | ||
| 336 | struct zfcp_hba_dbf_record { | |
| 337 | u8 tag[ZFCP_DBF_TAG_SIZE]; | |
| 338 | u8 tag2[ZFCP_DBF_TAG_SIZE]; | |
| 339 | union { | |
| 340 | struct zfcp_hba_dbf_record_response response; | |
| 341 | struct zfcp_hba_dbf_record_status status; | |
| 342 | struct zfcp_hba_dbf_record_qdio qdio; | |
| 343 | } type; | |
| 344 | } __attribute__ ((packed)); | |
| 345 | ||
| 346 | struct zfcp_san_dbf_record_ct { | |
| 347 | union { | |
| 348 | struct { | |
| 349 | u16 cmd_req_code; | |
| 350 | u8 revision; | |
| 351 | u8 gs_type; | |
| 352 | u8 gs_subtype; | |
| 353 | u8 options; | |
| 354 | u16 max_res_size; | |
| 355 | } request; | |
| 356 | struct { | |
| 357 | u16 cmd_rsp_code; | |
| 358 | u8 revision; | |
| 359 | u8 reason_code; | |
| 360 | u8 reason_code_expl; | |
| 361 | u8 vendor_unique; | |
| 362 | } response; | |
| 363 | } type; | |
| 364 | u32 payload_size; | |
| 365 | #define ZFCP_DBF_CT_PAYLOAD 24 | |
| 366 | u8 payload[ZFCP_DBF_CT_PAYLOAD]; | |
| 367 | } __attribute__ ((packed)); | |
| 368 | ||
| 369 | struct zfcp_san_dbf_record_els { | |
| 370 | u8 ls_code; | |
| 371 | u32 payload_size; | |
| 372 | #define ZFCP_DBF_ELS_PAYLOAD 32 | |
| 373 | #define ZFCP_DBF_ELS_MAX_PAYLOAD 1024 | |
| 374 | u8 payload[ZFCP_DBF_ELS_PAYLOAD]; | |
| 375 | } __attribute__ ((packed)); | |
| 376 | ||
| 377 | struct zfcp_san_dbf_record { | |
| 378 | u8 tag[ZFCP_DBF_TAG_SIZE]; | |
| 379 | u64 fsf_reqid; | |
| 380 | u32 fsf_seqno; | |
| 381 | u32 s_id; | |
| 382 | u32 d_id; | |
| 383 | union { | |
| 384 | struct zfcp_san_dbf_record_ct ct; | |
| 385 | struct zfcp_san_dbf_record_els els; | |
| 386 | } type; | |
| 387 | } __attribute__ ((packed)); | |
| 388 | ||
| 389 | struct zfcp_scsi_dbf_record { | |
| 390 | u8 tag[ZFCP_DBF_TAG_SIZE]; | |
| 391 | u8 tag2[ZFCP_DBF_TAG_SIZE]; | |
| 392 | u32 scsi_id; | |
| 393 | u32 scsi_lun; | |
| 394 | u32 scsi_result; | |
| 395 | u64 scsi_cmnd; | |
| 396 | u64 scsi_serial; | |
| 397 | #define ZFCP_DBF_SCSI_OPCODE 16 | |
| 398 | u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE]; | |
| 399 | u8 scsi_retries; | |
| 400 | u8 scsi_allowed; | |
| 401 | u64 fsf_reqid; | |
| 402 | u32 fsf_seqno; | |
| 403 | u64 fsf_issued; | |
| 404 | union { | |
| ed829ad6 | 405 | u64 old_fsf_reqid; |
| 8a36e453 MS |
406 | struct { |
| 407 | u8 rsp_validity; | |
| 408 | u8 rsp_scsi_status; | |
| 409 | u32 rsp_resid; | |
| 410 | u8 rsp_code; | |
| 411 | #define ZFCP_DBF_SCSI_FCP_SNS_INFO 16 | |
| 412 | #define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256 | |
| 413 | u32 sns_info_len; | |
| 414 | u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO]; | |
| 415 | } fcp; | |
| 416 | } type; | |
| 417 | } __attribute__ ((packed)); | |
| 418 | ||
| 1da177e4 LT |
419 | /* |
| 420 | * FC-FS stuff | |
| 421 | */ | |
| 422 | #define R_A_TOV 10 /* seconds */ | |
| 423 | #define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) | |
| 424 | ||
| 425 | #define ZFCP_LS_RLS 0x0f | |
| 426 | #define ZFCP_LS_ADISC 0x52 | |
| 427 | #define ZFCP_LS_RPS 0x56 | |
| 428 | #define ZFCP_LS_RSCN 0x61 | |
| 429 | #define ZFCP_LS_RNID 0x78 | |
| 430 | ||
| 431 | struct zfcp_ls_rjt_par { | |
| 432 | u8 action; | |
| 433 | u8 reason_code; | |
| 434 | u8 reason_expl; | |
| 435 | u8 vendor_unique; | |
| 436 | } __attribute__ ((packed)); | |
| 437 | ||
| 438 | struct zfcp_ls_adisc { | |
| 439 | u8 code; | |
| 440 | u8 field[3]; | |
| 441 | u32 hard_nport_id; | |
| 442 | u64 wwpn; | |
| 443 | u64 wwnn; | |
| 444 | u32 nport_id; | |
| 445 | } __attribute__ ((packed)); | |
| 446 | ||
| 447 | struct zfcp_ls_adisc_acc { | |
| 448 | u8 code; | |
| 449 | u8 field[3]; | |
| 450 | u32 hard_nport_id; | |
| 451 | u64 wwpn; | |
| 452 | u64 wwnn; | |
| 453 | u32 nport_id; | |
| 454 | } __attribute__ ((packed)); | |
| 455 | ||
| 456 | struct zfcp_rc_entry { | |
| 457 | u8 code; | |
| 458 | const char *description; | |
| 459 | }; | |
| 460 | ||
| 461 | /* | |
| 462 | * FC-GS-2 stuff | |
| 463 | */ | |
| 464 | #define ZFCP_CT_REVISION 0x01 | |
| 465 | #define ZFCP_CT_DIRECTORY_SERVICE 0xFC | |
| 466 | #define ZFCP_CT_NAME_SERVER 0x02 | |
| 467 | #define ZFCP_CT_SYNCHRONOUS 0x00 | |
| 468 | #define ZFCP_CT_GID_PN 0x0121 | |
| 469 | #define ZFCP_CT_MAX_SIZE 0x1020 | |
| 470 | #define ZFCP_CT_ACCEPT 0x8002 | |
| 471 | #define ZFCP_CT_REJECT 0x8001 | |
| 472 | ||
| 473 | /* | |
| 474 | * FC-GS-4 stuff | |
| 475 | */ | |
| 476 | #define ZFCP_CT_TIMEOUT (3 * R_A_TOV) | |
| 477 | ||
| 1da177e4 LT |
478 | /******************** LOGGING MACROS AND DEFINES *****************************/ |
| 479 | ||
| 480 | /* | |
| 481 | * Logging may be applied on certain kinds of driver operations | |
| 482 | * independently. Additionally, different log-levels are supported for | |
| 483 | * each of these areas. | |
| 484 | */ | |
| 485 | ||
| 486 | #define ZFCP_NAME "zfcp" | |
| 487 | ||
| 1da177e4 LT |
488 | /* independent log areas */ |
| 489 | #define ZFCP_LOG_AREA_OTHER 0 | |
| 490 | #define ZFCP_LOG_AREA_SCSI 1 | |
| 491 | #define ZFCP_LOG_AREA_FSF 2 | |
| 492 | #define ZFCP_LOG_AREA_CONFIG 3 | |
| 493 | #define ZFCP_LOG_AREA_CIO 4 | |
| 494 | #define ZFCP_LOG_AREA_QDIO 5 | |
| 495 | #define ZFCP_LOG_AREA_ERP 6 | |
| 496 | #define ZFCP_LOG_AREA_FC 7 | |
| 497 | ||
| 498 | /* log level values*/ | |
| 499 | #define ZFCP_LOG_LEVEL_NORMAL 0 | |
| 500 | #define ZFCP_LOG_LEVEL_INFO 1 | |
| 501 | #define ZFCP_LOG_LEVEL_DEBUG 2 | |
| 502 | #define ZFCP_LOG_LEVEL_TRACE 3 | |
| 503 | ||
| 504 | /* | |
| 505 | * this allows removal of logging code by the preprocessor | |
| 506 | * (the most detailed log level still to be compiled in is specified, | |
| 507 | * higher log levels are removed) | |
| 508 | */ | |
| 509 | #define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE | |
| 510 | ||
| 511 | /* get "loglevel" nibble assignment */ | |
| 512 | #define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \ | |
| 513 | ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF) | |
| 514 | ||
| 515 | /* set "loglevel" nibble */ | |
| 516 | #define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \ | |
| 517 | (value << (zfcp_lognibble << 2)) | |
| 518 | ||
| 519 | /* all log-level defaults are combined to generate initial log-level */ | |
| 520 | #define ZFCP_LOG_LEVEL_DEFAULTS \ | |
| 521 | (ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \ | |
| 522 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \ | |
| 523 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \ | |
| 524 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \ | |
| 525 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \ | |
| 526 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \ | |
| 527 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \ | |
| 528 | ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC)) | |
| 529 | ||
| 530 | /* check whether we have the right level for logging */ | |
| 531 | #define ZFCP_LOG_CHECK(level) \ | |
| 532 | ((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level) | |
| 533 | ||
| 534 | /* logging routine for zfcp */ | |
| 535 | #define _ZFCP_LOG(fmt, args...) \ | |
| 536 | printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \ | |
| 537 | __LINE__ , ##args) | |
| 538 | ||
| 539 | #define ZFCP_LOG(level, fmt, args...) \ | |
| 540 | do { \ | |
| 541 | if (ZFCP_LOG_CHECK(level)) \ | |
| 542 | _ZFCP_LOG(fmt, ##args); \ | |
| 543 | } while (0) | |
| 544 | ||
| 545 | #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL | |
| 546 | # define ZFCP_LOG_NORMAL(fmt, args...) | |
| 547 | #else | |
| 548 | # define ZFCP_LOG_NORMAL(fmt, args...) \ | |
| 549 | do { \ | |
| 550 | if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \ | |
| 551 | printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ | |
| 552 | } while (0) | |
| 553 | #endif | |
| 554 | ||
| 555 | #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO | |
| 556 | # define ZFCP_LOG_INFO(fmt, args...) | |
| 557 | #else | |
| 558 | # define ZFCP_LOG_INFO(fmt, args...) \ | |
| 559 | do { \ | |
| 560 | if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \ | |
| 561 | printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \ | |
| 562 | } while (0) | |
| 563 | #endif | |
| 564 | ||
| 565 | #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG | |
| 566 | # define ZFCP_LOG_DEBUG(fmt, args...) | |
| 567 | #else | |
| 568 | # define ZFCP_LOG_DEBUG(fmt, args...) \ | |
| 569 | ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args) | |
| 570 | #endif | |
| 571 | ||
| 572 | #if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE | |
| 573 | # define ZFCP_LOG_TRACE(fmt, args...) | |
| 574 | #else | |
| 575 | # define ZFCP_LOG_TRACE(fmt, args...) \ | |
| 576 | ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) | |
| 577 | #endif | |
| 578 | ||
| 1da177e4 LT |
579 | /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ |
| 580 | ||
| 581 | /* | |
| 582 | * Note, the leftmost status byte is common among adapter, port | |
| 583 | * and unit | |
| 584 | */ | |
| 585 | #define ZFCP_COMMON_FLAGS 0xfff00000 | |
| 1da177e4 LT |
586 | |
| 587 | /* common status bits */ | |
| 588 | #define ZFCP_STATUS_COMMON_REMOVE 0x80000000 | |
| 589 | #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 | |
| 590 | #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 | |
| 591 | #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 | |
| 592 | #define ZFCP_STATUS_COMMON_OPENING 0x08000000 | |
| 593 | #define ZFCP_STATUS_COMMON_OPEN 0x04000000 | |
| 594 | #define ZFCP_STATUS_COMMON_CLOSING 0x02000000 | |
| 595 | #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 | |
| 596 | #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 | |
| d736a27b | 597 | #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 |
| 1da177e4 LT |
598 | |
| 599 | /* adapter status */ | |
| 600 | #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 | |
| 601 | #define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 | |
| 602 | #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 | |
| 603 | #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 | |
| 604 | #define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020 | |
| 605 | #define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080 | |
| 606 | #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 | |
| 607 | #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 | |
| aef4a983 | 608 | #define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800 |
| 1da177e4 | 609 | |
| 1da177e4 LT |
610 | /* FC-PH/FC-GS well-known address identifiers for generic services */ |
| 611 | #define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA | |
| 612 | #define ZFCP_DID_TIME_SERVICE 0xFFFFFB | |
| 613 | #define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC | |
| 614 | #define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8 | |
| 615 | #define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7 | |
| 616 | ||
| 617 | /* remote port status */ | |
| 618 | #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 | |
| 619 | #define ZFCP_STATUS_PORT_DID_DID 0x00000002 | |
| 620 | #define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004 | |
| 621 | #define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 | |
| 622 | #define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010 | |
| 623 | #define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 | |
| 1da177e4 LT |
624 | |
| 625 | /* for ports with well known addresses */ | |
| 626 | #define ZFCP_STATUS_PORT_WKA \ | |
| 627 | (ZFCP_STATUS_PORT_NO_WWPN | \ | |
| 628 | ZFCP_STATUS_PORT_NO_SCSI_ID) | |
| 629 | ||
| 630 | /* logical unit status */ | |
| 631 | #define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001 | |
| 632 | #define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002 | |
| 633 | #define ZFCP_STATUS_UNIT_SHARED 0x00000004 | |
| 634 | #define ZFCP_STATUS_UNIT_READONLY 0x00000008 | |
| ad58f7db | 635 | #define ZFCP_STATUS_UNIT_REGISTERED 0x00000010 |
| 1da177e4 LT |
636 | |
| 637 | /* FSF request status (this does not have a common part) */ | |
| 638 | #define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000 | |
| 639 | #define ZFCP_STATUS_FSFREQ_POOL 0x00000001 | |
| 640 | #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 | |
| 641 | #define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004 | |
| 642 | #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 | |
| 643 | #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 | |
| 644 | #define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020 | |
| 645 | #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 | |
| 646 | #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 | |
| 647 | #define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100 | |
| 648 | #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 | |
| 649 | #define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400 | |
| 650 | #define ZFCP_STATUS_FSFREQ_RETRY 0x00000800 | |
| 651 | #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 | |
| 652 | ||
| 653 | /*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/ | |
| 654 | ||
| 655 | #define ZFCP_MAX_ERPS 3 | |
| 656 | ||
| 657 | #define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ) | |
| 658 | #define ZFCP_ERP_MEMWAIT_TIMEOUT HZ | |
| 659 | ||
| 660 | #define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000 | |
| 661 | #define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000 | |
| 662 | #define ZFCP_STATUS_ERP_DISMISSING 0x00100000 | |
| 663 | #define ZFCP_STATUS_ERP_DISMISSED 0x00200000 | |
| 664 | #define ZFCP_STATUS_ERP_LOWMEM 0x00400000 | |
| 665 | ||
| 666 | #define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000 | |
| 667 | #define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001 | |
| 668 | #define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010 | |
| 669 | #define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100 | |
| 670 | #define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200 | |
| 671 | #define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400 | |
| 672 | #define ZFCP_ERP_STEP_PORT_OPENING 0x00000800 | |
| 673 | #define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000 | |
| 674 | #define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000 | |
| 675 | ||
| 676 | /* Ordered by escalation level (necessary for proper erp-code operation) */ | |
| 677 | #define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4 | |
| 678 | #define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3 | |
| 679 | #define ZFCP_ERP_ACTION_REOPEN_PORT 0x2 | |
| 680 | #define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1 | |
| 681 | ||
| 682 | #define ZFCP_ERP_ACTION_RUNNING 0x1 | |
| 683 | #define ZFCP_ERP_ACTION_READY 0x2 | |
| 684 | ||
| 685 | #define ZFCP_ERP_SUCCEEDED 0x0 | |
| 686 | #define ZFCP_ERP_FAILED 0x1 | |
| 687 | #define ZFCP_ERP_CONTINUES 0x2 | |
| 688 | #define ZFCP_ERP_EXIT 0x3 | |
| 689 | #define ZFCP_ERP_DISMISSED 0x4 | |
| 690 | #define ZFCP_ERP_NOMEM 0x5 | |
| 691 | ||
| 692 | ||
| 693 | /******************** CFDC SPECIFIC STUFF *****************************/ | |
| 694 | ||
| 695 | /* Firewall data channel sense data record */ | |
| 696 | struct zfcp_cfdc_sense_data { | |
| 697 | u32 signature; /* Request signature */ | |
| 698 | u32 devno; /* FCP adapter device number */ | |
| 699 | u32 command; /* Command code */ | |
| 700 | u32 fsf_status; /* FSF request status and status qualifier */ | |
| 701 | u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; | |
| 702 | u8 payloads[256]; /* Access conflicts list */ | |
| 703 | u8 control_file[0]; /* Access control table */ | |
| 704 | }; | |
| 705 | ||
| 706 | #define ZFCP_CFDC_SIGNATURE 0xCFDCACDF | |
| 707 | ||
| 708 | #define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001 | |
| 709 | #define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101 | |
| 710 | #define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201 | |
| 711 | #define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401 | |
| 712 | #define ZFCP_CFDC_CMND_UPLOAD 0x00010002 | |
| 713 | ||
| 714 | #define ZFCP_CFDC_DOWNLOAD 0x00000001 | |
| 715 | #define ZFCP_CFDC_UPLOAD 0x00000002 | |
| 716 | #define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000 | |
| 717 | ||
| 718 | #define ZFCP_CFDC_DEV_NAME "zfcp_cfdc" | |
| 719 | #define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR | |
| 720 | #define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR | |
| 721 | ||
| 722 | #define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024 | |
| 723 | ||
| 724 | /************************* STRUCTURE DEFINITIONS *****************************/ | |
| 725 | ||
| 726 | struct zfcp_fsf_req; | |
| 727 | ||
| 728 | /* holds various memory pools of an adapter */ | |
| 729 | struct zfcp_adapter_mempool { | |
| 730 | mempool_t *fsf_req_erp; | |
| 731 | mempool_t *fsf_req_scsi; | |
| 732 | mempool_t *fsf_req_abort; | |
| 733 | mempool_t *fsf_req_status_read; | |
| 734 | mempool_t *data_status_read; | |
| 735 | mempool_t *data_gid_pn; | |
| 736 | }; | |
| 737 | ||
| 1da177e4 LT |
738 | /* |
| 739 | * header for CT_IU | |
| 740 | */ | |
| 741 | struct ct_hdr { | |
| 742 | u8 revision; // 0x01 | |
| 743 | u8 in_id[3]; // 0x00 | |
| 744 | u8 gs_type; // 0xFC Directory Service | |
| 745 | u8 gs_subtype; // 0x02 Name Server | |
| 746 | u8 options; // 0x00 single bidirectional exchange | |
| 747 | u8 reserved0; | |
| 748 | u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT | |
| 749 | u16 max_res_size; // <= (4096 - 16) / 4 | |
| 750 | u8 reserved1; | |
| 751 | u8 reason_code; | |
| 752 | u8 reason_code_expl; | |
| 753 | u8 vendor_unique; | |
| 754 | } __attribute__ ((packed)); | |
| 755 | ||
| 756 | /* nameserver request CT_IU -- for requests where | |
| 757 | * a port name is required */ | |
| 758 | struct ct_iu_gid_pn_req { | |
| 759 | struct ct_hdr header; | |
| 760 | wwn_t wwpn; | |
| 761 | } __attribute__ ((packed)); | |
| 762 | ||
| 763 | /* FS_ACC IU and data unit for GID_PN nameserver request */ | |
| 764 | struct ct_iu_gid_pn_resp { | |
| 765 | struct ct_hdr header; | |
| 13e1e1f0 | 766 | u32 d_id; |
| 1da177e4 LT |
767 | } __attribute__ ((packed)); |
| 768 | ||
| 769 | typedef void (*zfcp_send_ct_handler_t)(unsigned long); | |
| 770 | ||
| 771 | /** | |
| 772 | * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct | |
| 773 | * @port: port where the request is sent to | |
| 774 | * @req: scatter-gather list for request | |
| 775 | * @resp: scatter-gather list for response | |
| 776 | * @req_count: number of elements in request scatter-gather list | |
| 777 | * @resp_count: number of elements in response scatter-gather list | |
| 778 | * @handler: handler function (called for response to the request) | |
| 779 | * @handler_data: data passed to handler function | |
| 780 | * @pool: pointer to memory pool for ct request structure | |
| 781 | * @timeout: FSF timeout for this request | |
| 782 | * @timer: timer (e.g. for request initiated by erp) | |
| 783 | * @completion: completion for synchronization purposes | |
| 784 | * @status: used to pass error status to calling function | |
| 785 | */ | |
| 786 | struct zfcp_send_ct { | |
| 787 | struct zfcp_port *port; | |
| 788 | struct scatterlist *req; | |
| 789 | struct scatterlist *resp; | |
| 790 | unsigned int req_count; | |
| 791 | unsigned int resp_count; | |
| 792 | zfcp_send_ct_handler_t handler; | |
| 793 | unsigned long handler_data; | |
| 794 | mempool_t *pool; | |
| 795 | int timeout; | |
| 796 | struct timer_list *timer; | |
| 797 | struct completion *completion; | |
| 798 | int status; | |
| 799 | }; | |
| 800 | ||
| 801 | /* used for name server requests in error recovery */ | |
| 802 | struct zfcp_gid_pn_data { | |
| 803 | struct zfcp_send_ct ct; | |
| 804 | struct scatterlist req; | |
| 805 | struct scatterlist resp; | |
| 806 | struct ct_iu_gid_pn_req ct_iu_req; | |
| 807 | struct ct_iu_gid_pn_resp ct_iu_resp; | |
| 808 | struct zfcp_port *port; | |
| 809 | }; | |
| 810 | ||
| 811 | typedef void (*zfcp_send_els_handler_t)(unsigned long); | |
| 812 | ||
| 813 | /** | |
| 814 | * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els | |
| 815 | * @adapter: adapter where request is sent from | |
| 64b29a13 | 816 | * @port: port where ELS is destinated (port reference count has to be increased) |
| 1da177e4 LT |
817 | * @d_id: destiniation id of port where request is sent to |
| 818 | * @req: scatter-gather list for request | |
| 819 | * @resp: scatter-gather list for response | |
| 820 | * @req_count: number of elements in request scatter-gather list | |
| 821 | * @resp_count: number of elements in response scatter-gather list | |
| 822 | * @handler: handler function (called for response to the request) | |
| 823 | * @handler_data: data passed to handler function | |
| 824 | * @timer: timer (e.g. for request initiated by erp) | |
| 825 | * @completion: completion for synchronization purposes | |
| 826 | * @ls_code: hex code of ELS command | |
| 827 | * @status: used to pass error status to calling function | |
| 828 | */ | |
| 829 | struct zfcp_send_els { | |
| 830 | struct zfcp_adapter *adapter; | |
| 64b29a13 | 831 | struct zfcp_port *port; |
| 13e1e1f0 | 832 | u32 d_id; |
| 1da177e4 LT |
833 | struct scatterlist *req; |
| 834 | struct scatterlist *resp; | |
| 835 | unsigned int req_count; | |
| 836 | unsigned int resp_count; | |
| 837 | zfcp_send_els_handler_t handler; | |
| 838 | unsigned long handler_data; | |
| 839 | struct timer_list *timer; | |
| 840 | struct completion *completion; | |
| 841 | int ls_code; | |
| 842 | int status; | |
| 843 | }; | |
| 844 | ||
| 1da177e4 LT |
845 | struct zfcp_qdio_queue { |
| 846 | struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */ | |
| 847 | u8 free_index; /* index of next free bfr | |
| 848 | in queue (free_count>0) */ | |
| 849 | atomic_t free_count; /* number of free buffers | |
| 850 | in queue */ | |
| 851 | rwlock_t queue_lock; /* lock for operations on queue */ | |
| 852 | int distance_from_int; /* SBALs used since PCI indication | |
| 853 | was last set */ | |
| 854 | }; | |
| 855 | ||
| 856 | struct zfcp_erp_action { | |
| 857 | struct list_head list; | |
| 858 | int action; /* requested action code */ | |
| 859 | struct zfcp_adapter *adapter; /* device which should be recovered */ | |
| 860 | struct zfcp_port *port; | |
| 861 | struct zfcp_unit *unit; | |
| 862 | volatile u32 status; /* recovery status */ | |
| 863 | u32 step; /* active step of this erp action */ | |
| 864 | struct zfcp_fsf_req *fsf_req; /* fsf request currently pending | |
| 865 | for this action */ | |
| 866 | struct timer_list timer; | |
| 867 | }; | |
| 868 | ||
| 869 | ||
| 870 | struct zfcp_adapter { | |
| 871 | struct list_head list; /* list of adapters */ | |
| 872 | atomic_t refcount; /* reference count */ | |
| 873 | wait_queue_head_t remove_wq; /* can be used to wait for | |
| 874 | refcount drop to zero */ | |
| 6f71d9bc JB |
875 | wwn_t peer_wwnn; /* P2P peer WWNN */ |
| 876 | wwn_t peer_wwpn; /* P2P peer WWPN */ | |
| 13e1e1f0 | 877 | u32 peer_d_id; /* P2P peer D_ID */ |
| 1da177e4 | 878 | struct ccw_device *ccw_device; /* S/390 ccw device */ |
| 1da177e4 LT |
879 | u32 hydra_version; /* Hydra version */ |
| 880 | u32 fsf_lic_version; | |
| aef4a983 MS |
881 | u32 adapter_features; /* FCP channel features */ |
| 882 | u32 connection_features; /* host connection features */ | |
| 1da177e4 | 883 | u32 hardware_version; /* of FCP channel */ |
| 1da177e4 | 884 | struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ |
| 1da177e4 LT |
885 | struct list_head port_list_head; /* remote port list */ |
| 886 | struct list_head port_remove_lh; /* head of ports to be | |
| 887 | removed */ | |
| 888 | u32 ports; /* number of remote ports */ | |
| fea9d6c7 VS |
889 | struct timer_list scsi_er_timer; /* SCSI err recovery watch */ |
| 890 | atomic_t reqs_active; /* # active FSF reqs */ | |
| 891 | unsigned long req_no; /* unique FSF req number */ | |
| 892 | struct list_head *req_list; /* list of pending reqs */ | |
| 893 | spinlock_t req_list_lock; /* request list lock */ | |
| 1da177e4 LT |
894 | struct zfcp_qdio_queue request_queue; /* request queue */ |
| 895 | u32 fsf_req_seq_no; /* FSF cmnd seq number */ | |
| 896 | wait_queue_head_t request_wq; /* can be used to wait for | |
| 897 | more avaliable SBALs */ | |
| 898 | struct zfcp_qdio_queue response_queue; /* response queue */ | |
| 899 | rwlock_t abort_lock; /* Protects against SCSI | |
| 900 | stack abort/command | |
| 901 | completion races */ | |
| 902 | u16 status_read_failed; /* # failed status reads */ | |
| 903 | atomic_t status; /* status of this adapter */ | |
| 904 | struct list_head erp_ready_head; /* error recovery for this | |
| 905 | adapter/devices */ | |
| 906 | struct list_head erp_running_head; | |
| 907 | rwlock_t erp_lock; | |
| 908 | struct semaphore erp_ready_sem; | |
| 909 | wait_queue_head_t erp_thread_wqh; | |
| 910 | wait_queue_head_t erp_done_wqh; | |
| 911 | struct zfcp_erp_action erp_action; /* pending error recovery */ | |
| 912 | atomic_t erp_counter; | |
| 913 | u32 erp_total_count; /* total nr of enqueued erp | |
| 914 | actions */ | |
| 915 | u32 erp_low_mem_count; /* nr of erp actions waiting | |
| 916 | for memory */ | |
| 917 | struct zfcp_port *nameserver_port; /* adapter's nameserver */ | |
| 8a36e453 MS |
918 | debug_info_t *erp_dbf; |
| 919 | debug_info_t *hba_dbf; | |
| 920 | debug_info_t *san_dbf; /* debug feature areas */ | |
| 921 | debug_info_t *scsi_dbf; | |
| 922 | spinlock_t erp_dbf_lock; | |
| 923 | spinlock_t hba_dbf_lock; | |
| 924 | spinlock_t san_dbf_lock; | |
| 925 | spinlock_t scsi_dbf_lock; | |
| 926 | struct zfcp_erp_dbf_record erp_dbf_buf; | |
| 927 | struct zfcp_hba_dbf_record hba_dbf_buf; | |
| 928 | struct zfcp_san_dbf_record san_dbf_buf; | |
| 929 | struct zfcp_scsi_dbf_record scsi_dbf_buf; | |
| 1da177e4 LT |
930 | struct zfcp_adapter_mempool pool; /* Adapter memory pools */ |
| 931 | struct qdio_initialize qdio_init_data; /* for qdio_establish */ | |
| 932 | struct device generic_services; /* directory for WKA ports */ | |
| f6cd94b1 AH |
933 | struct fc_host_statistics *fc_stats; |
| 934 | struct fsf_qtcb_bottom_port *stats_reset_data; | |
| 935 | unsigned long stats_reset; | |
| 1da177e4 LT |
936 | }; |
| 937 | ||
| 938 | /* | |
| 939 | * the struct device sysfs_device must be at the beginning of this structure. | |
| 940 | * pointer to struct device is used to free port structure in release function | |
| 941 | * of the device. don't change! | |
| 942 | */ | |
| 943 | struct zfcp_port { | |
| 944 | struct device sysfs_device; /* sysfs device */ | |
| 3859f6a2 | 945 | struct fc_rport *rport; /* rport of fc transport class */ |
| 1da177e4 LT |
946 | struct list_head list; /* list of remote ports */ |
| 947 | atomic_t refcount; /* reference count */ | |
| 948 | wait_queue_head_t remove_wq; /* can be used to wait for | |
| 949 | refcount drop to zero */ | |
| 950 | struct zfcp_adapter *adapter; /* adapter used to access port */ | |
| 951 | struct list_head unit_list_head; /* head of logical unit list */ | |
| 952 | struct list_head unit_remove_lh; /* head of luns to be removed | |
| 953 | list */ | |
| 954 | u32 units; /* # of logical units in list */ | |
| 955 | atomic_t status; /* status of this remote port */ | |
| 1da177e4 LT |
956 | wwn_t wwnn; /* WWNN if known */ |
| 957 | wwn_t wwpn; /* WWPN */ | |
| 13e1e1f0 | 958 | u32 d_id; /* D_ID */ |
| 1da177e4 LT |
959 | u32 handle; /* handle assigned by FSF */ |
| 960 | struct zfcp_erp_action erp_action; /* pending error recovery */ | |
| 961 | atomic_t erp_counter; | |
| 75bfc283 RW |
962 | u32 maxframe_size; |
| 963 | u32 supported_classes; | |
| 1da177e4 LT |
964 | }; |
| 965 | ||
| 966 | /* the struct device sysfs_device must be at the beginning of this structure. | |
| 967 | * pointer to struct device is used to free unit structure in release function | |
| 968 | * of the device. don't change! | |
| 969 | */ | |
| 970 | struct zfcp_unit { | |
| 971 | struct device sysfs_device; /* sysfs device */ | |
| 972 | struct list_head list; /* list of logical units */ | |
| 973 | atomic_t refcount; /* reference count */ | |
| 974 | wait_queue_head_t remove_wq; /* can be used to wait for | |
| 975 | refcount drop to zero */ | |
| 976 | struct zfcp_port *port; /* remote port of unit */ | |
| 977 | atomic_t status; /* status of this logical unit */ | |
| 06506d00 | 978 | unsigned int scsi_lun; /* own SCSI LUN */ |
| 1da177e4 LT |
979 | fcp_lun_t fcp_lun; /* own FCP_LUN */ |
| 980 | u32 handle; /* handle assigned by FSF */ | |
| 981 | struct scsi_device *device; /* scsi device struct pointer */ | |
| 982 | struct zfcp_erp_action erp_action; /* pending error recovery */ | |
| 983 | atomic_t erp_counter; | |
| 984 | }; | |
| 985 | ||
| 986 | /* FSF request */ | |
| 987 | struct zfcp_fsf_req { | |
| 988 | struct list_head list; /* list of FSF requests */ | |
| fea9d6c7 | 989 | unsigned long req_id; /* unique request ID */ |
| 1da177e4 LT |
990 | struct zfcp_adapter *adapter; /* adapter request belongs to */ |
| 991 | u8 sbal_number; /* nr of SBALs free for use */ | |
| 992 | u8 sbal_first; /* first SBAL for this request */ | |
| 993 | u8 sbal_last; /* last possible SBAL for | |
| 994 | this reuest */ | |
| 995 | u8 sbal_curr; /* current SBAL during creation | |
| 996 | of request */ | |
| 997 | u8 sbale_curr; /* current SBALE during creation | |
| 998 | of request */ | |
| 999 | wait_queue_head_t completion_wq; /* can be used by a routine | |
| 1000 | to wait for completion */ | |
| 1001 | volatile u32 status; /* status of this request */ | |
| 1002 | u32 fsf_command; /* FSF Command copy */ | |
| 1003 | struct fsf_qtcb *qtcb; /* address of associated QTCB */ | |
| 1004 | u32 seq_no; /* Sequence number of request */ | |
| 059c97d0 | 1005 | unsigned long data; /* private data of request */ |
| 1da177e4 LT |
1006 | struct zfcp_erp_action *erp_action; /* used if this request is |
| 1007 | issued on behalf of erp */ | |
| 1008 | mempool_t *pool; /* used if request was alloacted | |
| 1009 | from emergency pool */ | |
| 8a36e453 | 1010 | unsigned long long issued; /* request sent time (STCK) */ |
| 059c97d0 | 1011 | struct zfcp_unit *unit; |
| 1da177e4 LT |
1012 | }; |
| 1013 | ||
| 1014 | typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*); | |
| 1015 | ||
| 1016 | /* driver data */ | |
| 1017 | struct zfcp_data { | |
| 1018 | struct scsi_host_template scsi_host_template; | |
| 1019 | atomic_t status; /* Module status flags */ | |
| 1020 | struct list_head adapter_list_head; /* head of adapter list */ | |
| 1021 | struct list_head adapter_remove_lh; /* head of adapters to be | |
| 1022 | removed */ | |
| 1da177e4 LT |
1023 | u32 adapters; /* # of adapters in list */ |
| 1024 | rwlock_t config_lock; /* serialises changes | |
| 1025 | to adapter/port/unit | |
| 1026 | lists */ | |
| 1027 | struct semaphore config_sema; /* serialises configuration | |
| 1028 | changes */ | |
| 1029 | atomic_t loglevel; /* current loglevel */ | |
| 1030 | char init_busid[BUS_ID_SIZE]; | |
| 1031 | wwn_t init_wwpn; | |
| 1032 | fcp_lun_t init_fcp_lun; | |
| 1033 | char *driver_version; | |
| 1034 | }; | |
| 1035 | ||
| 1036 | /** | |
| 1037 | * struct zfcp_sg_list - struct describing a scatter-gather list | |
| 1038 | * @sg: pointer to array of (struct scatterlist) | |
| 1039 | * @count: number of elements in scatter-gather list | |
| 1040 | */ | |
| 1041 | struct zfcp_sg_list { | |
| 1042 | struct scatterlist *sg; | |
| 1043 | unsigned int count; | |
| 1044 | }; | |
| 1045 | ||
| 1046 | /* number of elements for various memory pools */ | |
| 1047 | #define ZFCP_POOL_FSF_REQ_ERP_NR 1 | |
| 1048 | #define ZFCP_POOL_FSF_REQ_SCSI_NR 1 | |
| 1049 | #define ZFCP_POOL_FSF_REQ_ABORT_NR 1 | |
| 1050 | #define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM | |
| 1051 | #define ZFCP_POOL_DATA_GID_PN_NR 1 | |
| 1052 | ||
| 1053 | /* struct used by memory pools for fsf_requests */ | |
| 1054 | struct zfcp_fsf_req_pool_element { | |
| 1055 | struct zfcp_fsf_req fsf_req; | |
| 1056 | struct fsf_qtcb qtcb; | |
| 1057 | }; | |
| 1058 | ||
| 1059 | /********************** ZFCP SPECIFIC DEFINES ********************************/ | |
| 1060 | ||
| 1da177e4 LT |
1061 | #define ZFCP_REQ_AUTO_CLEANUP 0x00000002 |
| 1062 | #define ZFCP_WAIT_FOR_SBAL 0x00000004 | |
| 1063 | #define ZFCP_REQ_NO_QTCB 0x00000008 | |
| 1064 | ||
| 1065 | #define ZFCP_SET 0x00000100 | |
| 1066 | #define ZFCP_CLEAR 0x00000200 | |
| 1067 | ||
| 1da177e4 LT |
1068 | #ifndef atomic_test_mask |
| 1069 | #define atomic_test_mask(mask, target) \ | |
| 1070 | ((atomic_read(target) & mask) == mask) | |
| 1071 | #endif | |
| 1072 | ||
| 1073 | extern void _zfcp_hex_dump(char *, int); | |
| 1074 | #define ZFCP_HEX_DUMP(level, addr, count) \ | |
| 1075 | if (ZFCP_LOG_CHECK(level)) { \ | |
| 1076 | _zfcp_hex_dump(addr, count); \ | |
| 1077 | } | |
| 1078 | ||
| 1079 | #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id) | |
| 1080 | #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter)) | |
| 1081 | #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port)) | |
| 1082 | ||
| 1083 | /* | |
| 1084 | * functions needed for reference/usage counting | |
| 1085 | */ | |
| 1086 | ||
| 1087 | static inline void | |
| 1088 | zfcp_unit_get(struct zfcp_unit *unit) | |
| 1089 | { | |
| 1090 | atomic_inc(&unit->refcount); | |
| 1091 | } | |
| 1092 | ||
| 1093 | static inline void | |
| 1094 | zfcp_unit_put(struct zfcp_unit *unit) | |
| 1095 | { | |
| 1096 | if (atomic_dec_return(&unit->refcount) == 0) | |
| 1097 | wake_up(&unit->remove_wq); | |
| 1098 | } | |
| 1099 | ||
| 1100 | static inline void | |
| 1101 | zfcp_unit_wait(struct zfcp_unit *unit) | |
| 1102 | { | |
| 1103 | wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0); | |
| 1104 | } | |
| 1105 | ||
| 1106 | static inline void | |
| 1107 | zfcp_port_get(struct zfcp_port *port) | |
| 1108 | { | |
| 1109 | atomic_inc(&port->refcount); | |
| 1110 | } | |
| 1111 | ||
| 1112 | static inline void | |
| 1113 | zfcp_port_put(struct zfcp_port *port) | |
| 1114 | { | |
| 1115 | if (atomic_dec_return(&port->refcount) == 0) | |
| 1116 | wake_up(&port->remove_wq); | |
| 1117 | } | |
| 1118 | ||
| 1119 | static inline void | |
| 1120 | zfcp_port_wait(struct zfcp_port *port) | |
| 1121 | { | |
| 1122 | wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); | |
| 1123 | } | |
| 1124 | ||
| 1125 | static inline void | |
| 1126 | zfcp_adapter_get(struct zfcp_adapter *adapter) | |
| 1127 | { | |
| 1128 | atomic_inc(&adapter->refcount); | |
| 1129 | } | |
| 1130 | ||
| 1131 | static inline void | |
| 1132 | zfcp_adapter_put(struct zfcp_adapter *adapter) | |
| 1133 | { | |
| 1134 | if (atomic_dec_return(&adapter->refcount) == 0) | |
| 1135 | wake_up(&adapter->remove_wq); | |
| 1136 | } | |
| 1137 | ||
| 1138 | static inline void | |
| 1139 | zfcp_adapter_wait(struct zfcp_adapter *adapter) | |
| 1140 | { | |
| 1141 | wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); | |
| 1142 | } | |
| 1143 | ||
| 1144 | #endif /* ZFCP_DEF_H */ |