| /* |
| * zfcp device driver |
| * debug feature declarations |
| * |
| * Copyright IBM Corp. 2008, 2010 |
| */ |
| |
| #ifndef ZFCP_DBF_H |
| #define ZFCP_DBF_H |
| |
| #include <scsi/fc/fc_fcp.h> |
| #include "zfcp_ext.h" |
| #include "zfcp_fsf.h" |
| #include "zfcp_def.h" |
| |
| #define ZFCP_DBF_TAG_LEN 7 |
| |
| #define ZFCP_DBF_INVALID_LUN 0xFFFFFFFFFFFFFFFFull |
| |
| /** |
| * struct zfcp_dbf_rec_trigger - trace record for triggered recovery action |
| * @ready: number of ready recovery actions |
| * @running: number of running recovery actions |
| * @want: wanted recovery action |
| * @need: needed recovery action |
| */ |
| struct zfcp_dbf_rec_trigger { |
| u32 ready; |
| u32 running; |
| u8 want; |
| u8 need; |
| } __packed; |
| |
| /** |
| * struct zfcp_dbf_rec_running - trace record for running recovery |
| * @fsf_req_id: request id for fsf requests |
| * @rec_status: status of the fsf request |
| * @rec_step: current step of the recovery action |
| * rec_count: recovery counter |
| */ |
| struct zfcp_dbf_rec_running { |
| u64 fsf_req_id; |
| u32 rec_status; |
| u16 rec_step; |
| u8 rec_action; |
| u8 rec_count; |
| } __packed; |
| |
| /** |
| * enum zfcp_dbf_rec_id - recovery trace record id |
| * @ZFCP_DBF_REC_TRIG: triggered recovery identifier |
| * @ZFCP_DBF_REC_RUN: running recovery identifier |
| */ |
| enum zfcp_dbf_rec_id { |
| ZFCP_DBF_REC_TRIG = 1, |
| ZFCP_DBF_REC_RUN = 2, |
| }; |
| |
| /** |
| * struct zfcp_dbf_rec - trace record for error recovery actions |
| * @id: unique number of recovery record type |
| * @tag: identifier string specifying the location of initiation |
| * @lun: logical unit number |
| * @wwpn: word wide port number |
| * @d_id: destination ID |
| * @adapter_status: current status of the adapter |
| * @port_status: current status of the port |
| * @lun_status: current status of the lun |
| * @u.trig: structure zfcp_dbf_rec_trigger |
| * @u.run: structure zfcp_dbf_rec_running |
| */ |
| struct zfcp_dbf_rec { |
| u8 id; |
| char tag[ZFCP_DBF_TAG_LEN]; |
| u64 lun; |
| u64 wwpn; |
| u32 d_id; |
| u32 adapter_status; |
| u32 port_status; |
| u32 lun_status; |
| union { |
| struct zfcp_dbf_rec_trigger trig; |
| struct zfcp_dbf_rec_running run; |
| } u; |
| } __packed; |
| |
| /** |
| * enum zfcp_dbf_san_id - SAN trace record identifier |
| * @ZFCP_DBF_SAN_REQ: request trace record id |
| * @ZFCP_DBF_SAN_RES: response trace record id |
| * @ZFCP_DBF_SAN_ELS: extended link service record id |
| */ |
| enum zfcp_dbf_san_id { |
| ZFCP_DBF_SAN_REQ = 1, |
| ZFCP_DBF_SAN_RES = 2, |
| ZFCP_DBF_SAN_ELS = 3, |
| }; |
| |
| /** struct zfcp_dbf_san - trace record for SAN requests and responses |
| * @id: unique number of recovery record type |
| * @tag: identifier string specifying the location of initiation |
| * @fsf_req_id: request id for fsf requests |
| * @payload: unformatted information related to request/response |
| * @d_id: destination id |
| */ |
| struct zfcp_dbf_san { |
| u8 id; |
| char tag[ZFCP_DBF_TAG_LEN]; |
| u64 fsf_req_id; |
| u32 d_id; |
| #define ZFCP_DBF_SAN_MAX_PAYLOAD (FC_CT_HDR_LEN + 32) |
| char payload[ZFCP_DBF_SAN_MAX_PAYLOAD]; |
| } __packed; |
| |
| /** |
| * struct zfcp_dbf_hba_res - trace record for hba responses |
| * @req_issued: timestamp when request was issued |
| * @prot_status: protocol status |
| * @prot_status_qual: protocol status qualifier |
| * @fsf_status: fsf status |
| * @fsf_status_qual: fsf status qualifier |
| */ |
| struct zfcp_dbf_hba_res { |
| u64 req_issued; |
| u32 prot_status; |
| u8 prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE]; |
| u32 fsf_status; |
| u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; |
| } __packed; |
| |
| /** |
| * struct zfcp_dbf_hba_uss - trace record for unsolicited status |
| * @status_type: type of unsolicited status |
| * @status_subtype: subtype of unsolicited status |
| * @d_id: destination ID |
| * @lun: logical unit number |
| * @queue_designator: queue designator |
| */ |
| struct zfcp_dbf_hba_uss { |
| u32 status_type; |
| u32 status_subtype; |
| u32 d_id; |
| u64 lun; |
| u64 queue_designator; |
| } __packed; |
| |
| /** |
| * enum zfcp_dbf_hba_id - HBA trace record identifier |
| * @ZFCP_DBF_HBA_RES: response trace record |
| * @ZFCP_DBF_HBA_USS: unsolicited status trace record |
| * @ZFCP_DBF_HBA_BIT: bit error trace record |
| */ |
| enum zfcp_dbf_hba_id { |
| ZFCP_DBF_HBA_RES = 1, |
| ZFCP_DBF_HBA_USS = 2, |
| ZFCP_DBF_HBA_BIT = 3, |
| ZFCP_DBF_HBA_BASIC = 4, |
| }; |
| |
| /** |
| * struct zfcp_dbf_hba - common trace record for HBA records |
| * @id: unique number of recovery record type |
| * @tag: identifier string specifying the location of initiation |
| * @fsf_req_id: request id for fsf requests |
| * @fsf_req_status: status of fsf request |
| * @fsf_cmd: fsf command |
| * @fsf_seq_no: fsf sequence number |
| * @pl_len: length of payload stored as zfcp_dbf_pay |
| * @u: record type specific data |
| */ |
| struct zfcp_dbf_hba { |
| u8 id; |
| char tag[ZFCP_DBF_TAG_LEN]; |
| u64 fsf_req_id; |
| u32 fsf_req_status; |
| u32 fsf_cmd; |
| u32 fsf_seq_no; |
| u16 pl_len; |
| union { |
| struct zfcp_dbf_hba_res res; |
| struct zfcp_dbf_hba_uss uss; |
| struct fsf_bit_error_payload be; |
| } u; |
| } __packed; |
| |
| /** |
| * enum zfcp_dbf_scsi_id - scsi trace record identifier |
| * @ZFCP_DBF_SCSI_CMND: scsi command trace record |
| */ |
| enum zfcp_dbf_scsi_id { |
| ZFCP_DBF_SCSI_CMND = 1, |
| }; |
| |
| /** |
| * struct zfcp_dbf_scsi - common trace record for SCSI records |
| * @id: unique number of recovery record type |
| * @tag: identifier string specifying the location of initiation |
| * @scsi_id: scsi device id |
| * @scsi_lun: scsi device logical unit number |
| * @scsi_result: scsi result |
| * @scsi_retries: current retry number of scsi request |
| * @scsi_allowed: allowed retries |
| * @fcp_rsp_info: FCP response info |
| * @scsi_opcode: scsi opcode |
| * @fsf_req_id: request id of fsf request |
| * @host_scribble: LLD specific data attached to SCSI request |
| * @pl_len: length of paload stored as zfcp_dbf_pay |
| * @fsf_rsp: response for fsf request |
| */ |
| struct zfcp_dbf_scsi { |
| u8 id; |
| char tag[ZFCP_DBF_TAG_LEN]; |
| u32 scsi_id; |
| u32 scsi_lun; |
| u32 scsi_result; |
| u8 scsi_retries; |
| u8 scsi_allowed; |
| u8 fcp_rsp_info; |
| #define ZFCP_DBF_SCSI_OPCODE 16 |
| u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE]; |
| u64 fsf_req_id; |
| u64 host_scribble; |
| u16 pl_len; |
| struct fcp_resp_with_ext fcp_rsp; |
| } __packed; |
| |
| /** |
| * struct zfcp_dbf_pay - trace record for unformatted payload information |
| * @area: area this record is originated from |
| * @counter: ascending record number |
| * @fsf_req_id: request id of fsf request |
| * @data: unformatted data |
| */ |
| struct zfcp_dbf_pay { |
| u8 counter; |
| char area[ZFCP_DBF_TAG_LEN]; |
| u64 fsf_req_id; |
| #define ZFCP_DBF_PAY_MAX_REC 0x100 |
| char data[ZFCP_DBF_PAY_MAX_REC]; |
| } __packed; |
| |
| /** |
| * struct zfcp_dbf - main dbf trace structure |
| * @pay: reference to payload trace area |
| * @rec: reference to recovery trace area |
| * @hba: reference to hba trace area |
| * @san: reference to san trace area |
| * @scsi: reference to scsi trace area |
| * @pay_lock: lock protecting payload trace buffer |
| * @rec_lock: lock protecting recovery trace buffer |
| * @hba_lock: lock protecting hba trace buffer |
| * @san_lock: lock protecting san trace buffer |
| * @scsi_lock: lock protecting scsi trace buffer |
| * @pay_buf: pre-allocated buffer for payload |
| * @rec_buf: pre-allocated buffer for recovery |
| * @hba_buf: pre-allocated buffer for hba |
| * @san_buf: pre-allocated buffer for san |
| * @scsi_buf: pre-allocated buffer for scsi |
| */ |
| struct zfcp_dbf { |
| debug_info_t *pay; |
| debug_info_t *rec; |
| debug_info_t *hba; |
| debug_info_t *san; |
| debug_info_t *scsi; |
| spinlock_t pay_lock; |
| spinlock_t rec_lock; |
| spinlock_t hba_lock; |
| spinlock_t san_lock; |
| spinlock_t scsi_lock; |
| struct zfcp_dbf_pay pay_buf; |
| struct zfcp_dbf_rec rec_buf; |
| struct zfcp_dbf_hba hba_buf; |
| struct zfcp_dbf_san san_buf; |
| struct zfcp_dbf_scsi scsi_buf; |
| }; |
| |
| static inline |
| void zfcp_dbf_hba_fsf_resp(char *tag, int level, struct zfcp_fsf_req *req) |
| { |
| if (debug_level_enabled(req->adapter->dbf->hba, level)) |
| zfcp_dbf_hba_fsf_res(tag, req); |
| } |
| |
| /** |
| * zfcp_dbf_hba_fsf_response - trace event for request completion |
| * @req: request that has been completed |
| */ |
| static inline |
| void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req) |
| { |
| struct fsf_qtcb *qtcb = req->qtcb; |
| |
| if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) && |
| (qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) { |
| zfcp_dbf_hba_fsf_resp("fs_perr", 1, req); |
| |
| } else if (qtcb->header.fsf_status != FSF_GOOD) { |
| zfcp_dbf_hba_fsf_resp("fs_ferr", 1, req); |
| |
| } else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) || |
| (req->fsf_command == FSF_QTCB_OPEN_LUN)) { |
| zfcp_dbf_hba_fsf_resp("fs_open", 4, req); |
| |
| } else if (qtcb->header.log_length) { |
| zfcp_dbf_hba_fsf_resp("fs_qtcb", 5, req); |
| |
| } else { |
| zfcp_dbf_hba_fsf_resp("fs_norm", 6, req); |
| } |
| } |
| |
| static inline |
| void _zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *scmd, |
| struct zfcp_fsf_req *req) |
| { |
| struct zfcp_adapter *adapter = (struct zfcp_adapter *) |
| scmd->device->host->hostdata[0]; |
| |
| if (debug_level_enabled(adapter->dbf->scsi, level)) |
| zfcp_dbf_scsi(tag, scmd, req); |
| } |
| |
| /** |
| * zfcp_dbf_scsi_result - trace event for SCSI command completion |
| * @scmd: SCSI command pointer |
| * @req: FSF request used to issue SCSI command |
| */ |
| static inline |
| void zfcp_dbf_scsi_result(struct scsi_cmnd *scmd, struct zfcp_fsf_req *req) |
| { |
| if (scmd->result != 0) |
| _zfcp_dbf_scsi("rsl_err", 3, scmd, req); |
| else if (scmd->retries > 0) |
| _zfcp_dbf_scsi("rsl_ret", 4, scmd, req); |
| else |
| _zfcp_dbf_scsi("rsl_nor", 6, scmd, req); |
| } |
| |
| /** |
| * zfcp_dbf_scsi_fail_send - trace event for failure to send SCSI command |
| * @scmd: SCSI command pointer |
| */ |
| static inline |
| void zfcp_dbf_scsi_fail_send(struct scsi_cmnd *scmd) |
| { |
| _zfcp_dbf_scsi("rsl_fai", 4, scmd, NULL); |
| } |
| |
| /** |
| * zfcp_dbf_scsi_abort - trace event for SCSI command abort |
| * @tag: tag indicating success or failure of abort operation |
| * @scmd: SCSI command to be aborted |
| * @fsf_req: request containing abort (might be NULL) |
| */ |
| static inline |
| void zfcp_dbf_scsi_abort(char *tag, struct scsi_cmnd *scmd, |
| struct zfcp_fsf_req *fsf_req) |
| { |
| _zfcp_dbf_scsi(tag, 1, scmd, fsf_req); |
| } |
| |
| /** |
| * zfcp_dbf_scsi_devreset - trace event for Logical Unit or Target Reset |
| * @tag: tag indicating success or failure of reset operation |
| * @scmnd: SCSI command which caused this error recovery |
| * @flag: indicates type of reset (Target Reset, Logical Unit Reset) |
| */ |
| static inline |
| void zfcp_dbf_scsi_devreset(char *tag, struct scsi_cmnd *scmnd, u8 flag) |
| { |
| char tmp_tag[ZFCP_DBF_TAG_LEN]; |
| |
| if (flag == FCP_TMF_TGT_RESET) |
| memcpy(tmp_tag, "tr_", 3); |
| else |
| memcpy(tmp_tag, "lr_", 3); |
| |
| memcpy(&tmp_tag[3], tag, 4); |
| _zfcp_dbf_scsi(tmp_tag, 1, scmnd, NULL); |
| } |
| |
| #endif /* ZFCP_DBF_H */ |
