1/* 2 * zfcp device driver 3 * debug feature declarations 4 * 5 * Copyright IBM Corp. 2008, 2010 6 */ 7 8#ifndef ZFCP_DBF_H 9#define ZFCP_DBF_H 10 11#include <scsi/fc/fc_fcp.h> 12#include "zfcp_ext.h" 13#include "zfcp_fsf.h" 14#include "zfcp_def.h" 15 16#define ZFCP_DBF_TAG_LEN 7 17 18#define ZFCP_DBF_INVALID_LUN 0xFFFFFFFFFFFFFFFFull 19 20/** 21 * struct zfcp_dbf_rec_trigger - trace record for triggered recovery action 22 * @ready: number of ready recovery actions 23 * @running: number of running recovery actions 24 * @want: wanted recovery action 25 * @need: needed recovery action 26 */ 27struct zfcp_dbf_rec_trigger { 28 u32 ready; 29 u32 running; 30 u8 want; 31 u8 need; 32} __packed; 33 34/** 35 * struct zfcp_dbf_rec_running - trace record for running recovery 36 * @fsf_req_id: request id for fsf requests 37 * @rec_status: status of the fsf request 38 * @rec_step: current step of the recovery action 39 * rec_count: recovery counter 40 */ 41struct zfcp_dbf_rec_running { 42 u64 fsf_req_id; 43 u32 rec_status; 44 u16 rec_step; 45 u8 rec_action; 46 u8 rec_count; 47} __packed; 48 49/** 50 * enum zfcp_dbf_rec_id - recovery trace record id 51 * @ZFCP_DBF_REC_TRIG: triggered recovery identifier 52 * @ZFCP_DBF_REC_RUN: running recovery identifier 53 */ 54enum zfcp_dbf_rec_id { 55 ZFCP_DBF_REC_TRIG = 1, 56 ZFCP_DBF_REC_RUN = 2, 57}; 58 59/** 60 * struct zfcp_dbf_rec - trace record for error recovery actions 61 * @id: unique number of recovery record type 62 * @tag: identifier string specifying the location of initiation 63 * @lun: logical unit number 64 * @wwpn: word wide port number 65 * @d_id: destination ID 66 * @adapter_status: current status of the adapter 67 * @port_status: current status of the port 68 * @lun_status: current status of the lun 69 * @u.trig: structure zfcp_dbf_rec_trigger 70 * @u.run: structure zfcp_dbf_rec_running 71 */ 72struct zfcp_dbf_rec { 73 u8 id; 74 char tag[ZFCP_DBF_TAG_LEN]; 75 u64 lun; 76 u64 wwpn; 77 u32 d_id; 78 u32 adapter_status; 79 u32 port_status; 80 u32 lun_status; 81 union { 82 struct zfcp_dbf_rec_trigger trig; 83 struct zfcp_dbf_rec_running run; 84 } u; 85} __packed; 86 87/** 88 * enum zfcp_dbf_san_id - SAN trace record identifier 89 * @ZFCP_DBF_SAN_REQ: request trace record id 90 * @ZFCP_DBF_SAN_RES: response trace record id 91 * @ZFCP_DBF_SAN_ELS: extended link service record id 92 */ 93enum zfcp_dbf_san_id { 94 ZFCP_DBF_SAN_REQ = 1, 95 ZFCP_DBF_SAN_RES = 2, 96 ZFCP_DBF_SAN_ELS = 3, 97}; 98 99/** struct zfcp_dbf_san - trace record for SAN requests and responses 100 * @id: unique number of recovery record type 101 * @tag: identifier string specifying the location of initiation 102 * @fsf_req_id: request id for fsf requests 103 * @payload: unformatted information related to request/response 104 * @d_id: destination id 105 */ 106struct zfcp_dbf_san { 107 u8 id; 108 char tag[ZFCP_DBF_TAG_LEN]; 109 u64 fsf_req_id; 110 u32 d_id; 111#define ZFCP_DBF_SAN_MAX_PAYLOAD (FC_CT_HDR_LEN + 32) 112 char payload[ZFCP_DBF_SAN_MAX_PAYLOAD]; 113} __packed; 114 115/** 116 * struct zfcp_dbf_hba_res - trace record for hba responses 117 * @req_issued: timestamp when request was issued 118 * @prot_status: protocol status 119 * @prot_status_qual: protocol status qualifier 120 * @fsf_status: fsf status 121 * @fsf_status_qual: fsf status qualifier 122 */ 123struct zfcp_dbf_hba_res { 124 u64 req_issued; 125 u32 prot_status; 126 u8 prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE]; 127 u32 fsf_status; 128 u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; 129} __packed; 130 131/** 132 * struct zfcp_dbf_hba_uss - trace record for unsolicited status 133 * @status_type: type of unsolicited status 134 * @status_subtype: subtype of unsolicited status 135 * @d_id: destination ID 136 * @lun: logical unit number 137 * @queue_designator: queue designator 138 */ 139struct zfcp_dbf_hba_uss { 140 u32 status_type; 141 u32 status_subtype; 142 u32 d_id; 143 u64 lun; 144 u64 queue_designator; 145} __packed; 146 147/** 148 * enum zfcp_dbf_hba_id - HBA trace record identifier 149 * @ZFCP_DBF_HBA_RES: response trace record 150 * @ZFCP_DBF_HBA_USS: unsolicited status trace record 151 * @ZFCP_DBF_HBA_BIT: bit error trace record 152 */ 153enum zfcp_dbf_hba_id { 154 ZFCP_DBF_HBA_RES = 1, 155 ZFCP_DBF_HBA_USS = 2, 156 ZFCP_DBF_HBA_BIT = 3, 157}; 158 159/** 160 * struct zfcp_dbf_hba - common trace record for HBA records 161 * @id: unique number of recovery record type 162 * @tag: identifier string specifying the location of initiation 163 * @fsf_req_id: request id for fsf requests 164 * @fsf_req_status: status of fsf request 165 * @fsf_cmd: fsf command 166 * @fsf_seq_no: fsf sequence number 167 * @pl_len: length of payload stored as zfcp_dbf_pay 168 * @u: record type specific data 169 */ 170struct zfcp_dbf_hba { 171 u8 id; 172 char tag[ZFCP_DBF_TAG_LEN]; 173 u64 fsf_req_id; 174 u32 fsf_req_status; 175 u32 fsf_cmd; 176 u32 fsf_seq_no; 177 u16 pl_len; 178 union { 179 struct zfcp_dbf_hba_res res; 180 struct zfcp_dbf_hba_uss uss; 181 struct fsf_bit_error_payload be; 182 } u; 183} __packed; 184 185/** 186 * enum zfcp_dbf_scsi_id - scsi trace record identifier 187 * @ZFCP_DBF_SCSI_CMND: scsi command trace record 188 */ 189enum zfcp_dbf_scsi_id { 190 ZFCP_DBF_SCSI_CMND = 1, 191}; 192 193/** 194 * struct zfcp_dbf_scsi - common trace record for SCSI records 195 * @id: unique number of recovery record type 196 * @tag: identifier string specifying the location of initiation 197 * @scsi_id: scsi device id 198 * @scsi_lun: scsi device logical unit number 199 * @scsi_result: scsi result 200 * @scsi_retries: current retry number of scsi request 201 * @scsi_allowed: allowed retries 202 * @fcp_rsp_info: FCP response info 203 * @scsi_opcode: scsi opcode 204 * @fsf_req_id: request id of fsf request 205 * @host_scribble: LLD specific data attached to SCSI request 206 * @pl_len: length of paload stored as zfcp_dbf_pay 207 * @fsf_rsp: response for fsf request 208 */ 209struct zfcp_dbf_scsi { 210 u8 id; 211 char tag[ZFCP_DBF_TAG_LEN]; 212 u32 scsi_id; 213 u32 scsi_lun; 214 u32 scsi_result; 215 u8 scsi_retries; 216 u8 scsi_allowed; 217 u8 fcp_rsp_info; 218#define ZFCP_DBF_SCSI_OPCODE 16 219 u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE]; 220 u64 fsf_req_id; 221 u64 host_scribble; 222 u16 pl_len; 223 struct fcp_resp_with_ext fcp_rsp; 224} __packed; 225 226/** 227 * struct zfcp_dbf_pay - trace record for unformatted payload information 228 * @area: area this record is originated from 229 * @counter: ascending record number 230 * @fsf_req_id: request id of fsf request 231 * @data: unformatted data 232 */ 233struct zfcp_dbf_pay { 234 u8 counter; 235 char area[ZFCP_DBF_TAG_LEN]; 236 u64 fsf_req_id; 237#define ZFCP_DBF_PAY_MAX_REC 0x100 238 char data[ZFCP_DBF_PAY_MAX_REC]; 239} __packed; 240 241/** 242 * struct zfcp_dbf - main dbf trace structure 243 * @pay: reference to payload trace area 244 * @rec: reference to recovery trace area 245 * @hba: reference to hba trace area 246 * @san: reference to san trace area 247 * @scsi: reference to scsi trace area 248 * @pay_lock: lock protecting payload trace buffer 249 * @rec_lock: lock protecting recovery trace buffer 250 * @hba_lock: lock protecting hba trace buffer 251 * @san_lock: lock protecting san trace buffer 252 * @scsi_lock: lock protecting scsi trace buffer 253 * @pay_buf: pre-allocated buffer for payload 254 * @rec_buf: pre-allocated buffer for recovery 255 * @hba_buf: pre-allocated buffer for hba 256 * @san_buf: pre-allocated buffer for san 257 * @scsi_buf: pre-allocated buffer for scsi 258 */ 259struct zfcp_dbf { 260 debug_info_t *pay; 261 debug_info_t *rec; 262 debug_info_t *hba; 263 debug_info_t *san; 264 debug_info_t *scsi; 265 spinlock_t pay_lock; 266 spinlock_t rec_lock; 267 spinlock_t hba_lock; 268 spinlock_t san_lock; 269 spinlock_t scsi_lock; 270 struct zfcp_dbf_pay pay_buf; 271 struct zfcp_dbf_rec rec_buf; 272 struct zfcp_dbf_hba hba_buf; 273 struct zfcp_dbf_san san_buf; 274 struct zfcp_dbf_scsi scsi_buf; 275}; 276 277static inline 278void zfcp_dbf_hba_fsf_resp(char *tag, int level, struct zfcp_fsf_req *req) 279{ 280 if (level <= req->adapter->dbf->hba->level) 281 zfcp_dbf_hba_fsf_res(tag, req); 282} 283 284/** 285 * zfcp_dbf_hba_fsf_response - trace event for request completion 286 * @req: request that has been completed 287 */ 288static inline 289void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req) 290{ 291 struct fsf_qtcb *qtcb = req->qtcb; 292 293 if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) && 294 (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { 295 zfcp_dbf_hba_fsf_resp("fs_perr", 1, req); 296 297 } else if (qtcb->header.fsf_status != FSF_GOOD) { 298 zfcp_dbf_hba_fsf_resp("fs_ferr", 1, req); 299 300 } else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) || 301 (req->fsf_command == FSF_QTCB_OPEN_LUN)) { 302 zfcp_dbf_hba_fsf_resp("fs_open", 4, req); 303 304 } else if (qtcb->header.log_length) { 305 zfcp_dbf_hba_fsf_resp("fs_qtcb", 5, req); 306 307 } else { 308 zfcp_dbf_hba_fsf_resp("fs_norm", 6, req); 309 } 310} 311 312static inline 313void _zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *scmd, 314 struct zfcp_fsf_req *req) 315{ 316 struct zfcp_adapter *adapter = (struct zfcp_adapter *) 317 scmd->device->host->hostdata[0]; 318 319 if (level <= adapter->dbf->scsi->level) 320 zfcp_dbf_scsi(tag, scmd, req); 321} 322 323/** 324 * zfcp_dbf_scsi_result - trace event for SCSI command completion 325 * @scmd: SCSI command pointer 326 * @req: FSF request used to issue SCSI command 327 */ 328static inline 329void zfcp_dbf_scsi_result(struct scsi_cmnd *scmd, struct zfcp_fsf_req *req) 330{ 331 if (scmd->result != 0) 332 _zfcp_dbf_scsi("rsl_err", 3, scmd, req); 333 else if (scmd->retries > 0) 334 _zfcp_dbf_scsi("rsl_ret", 4, scmd, req); 335 else 336 _zfcp_dbf_scsi("rsl_nor", 6, scmd, req); 337} 338 339/** 340 * zfcp_dbf_scsi_fail_send - trace event for failure to send SCSI command 341 * @scmd: SCSI command pointer 342 */ 343static inline 344void zfcp_dbf_scsi_fail_send(struct scsi_cmnd *scmd) 345{ 346 _zfcp_dbf_scsi("rsl_fai", 4, scmd, NULL); 347} 348 349/** 350 * zfcp_dbf_scsi_abort - trace event for SCSI command abort 351 * @tag: tag indicating success or failure of abort operation 352 * @scmd: SCSI command to be aborted 353 * @fsf_req: request containing abort (might be NULL) 354 */ 355static inline 356void zfcp_dbf_scsi_abort(char *tag, struct scsi_cmnd *scmd, 357 struct zfcp_fsf_req *fsf_req) 358{ 359 _zfcp_dbf_scsi(tag, 1, scmd, fsf_req); 360} 361 362/** 363 * zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset 364 * @tag: tag indicating success or failure of reset operation 365 * @scmnd: SCSI command which caused this error recovery 366 * @flag: indicates type of reset (Target Reset, Logical Unit Reset) 367 */ 368static inline 369void zfcp_dbf_scsi_devreset(char *tag, struct scsi_cmnd *scmnd, u8 flag) 370{ 371 char tmp_tag[ZFCP_DBF_TAG_LEN]; 372 373 if (flag == FCP_TMF_TGT_RESET) 374 memcpy(tmp_tag, "tr_", 3); 375 else 376 memcpy(tmp_tag, "lr_", 3); 377 378 memcpy(&tmp_tag[3], tag, 4); 379 _zfcp_dbf_scsi(tmp_tag, 1, scmnd, NULL); 380} 381 382#endif /* ZFCP_DBF_H */ 383