452 lines
12 KiB
C
452 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* zfcp device driver
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* debug feature declarations
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*
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* Copyright IBM Corp. 2008, 2017
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*/
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#ifndef ZFCP_DBF_H
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#define ZFCP_DBF_H
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#include <scsi/fc/fc_fcp.h>
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#include "zfcp_ext.h"
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#include "zfcp_fsf.h"
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#include "zfcp_def.h"
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#define ZFCP_DBF_TAG_LEN 7
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#define ZFCP_DBF_INVALID_LUN 0xFFFFFFFFFFFFFFFFull
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enum zfcp_dbf_pseudo_erp_act_type {
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ZFCP_PSEUDO_ERP_ACTION_RPORT_ADD = 0xff,
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ZFCP_PSEUDO_ERP_ACTION_RPORT_DEL = 0xfe,
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};
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/**
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* struct zfcp_dbf_rec_trigger - trace record for triggered recovery action
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* @ready: number of ready recovery actions
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* @running: number of running recovery actions
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* @want: wanted recovery action
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* @need: needed recovery action
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*/
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struct zfcp_dbf_rec_trigger {
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u32 ready;
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u32 running;
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u8 want;
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u8 need;
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} __packed;
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/**
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* struct zfcp_dbf_rec_running - trace record for running recovery
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* @fsf_req_id: request id for fsf requests
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* @rec_status: status of the fsf request
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* @rec_step: current step of the recovery action
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* @rec_action: ERP action type
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* @rec_count: recoveries including retries for particular @rec_action
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*/
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struct zfcp_dbf_rec_running {
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u64 fsf_req_id;
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u32 rec_status;
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u16 rec_step;
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u8 rec_action;
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u8 rec_count;
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} __packed;
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/**
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* enum zfcp_dbf_rec_id - recovery trace record id
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* @ZFCP_DBF_REC_TRIG: triggered recovery identifier
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* @ZFCP_DBF_REC_RUN: running recovery identifier
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*/
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enum zfcp_dbf_rec_id {
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ZFCP_DBF_REC_TRIG = 1,
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ZFCP_DBF_REC_RUN = 2,
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};
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/**
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* struct zfcp_dbf_rec - trace record for error recovery actions
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* @id: unique number of recovery record type
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* @tag: identifier string specifying the location of initiation
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* @lun: logical unit number
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* @wwpn: word wide port number
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* @d_id: destination ID
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* @adapter_status: current status of the adapter
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* @port_status: current status of the port
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* @lun_status: current status of the lun
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* @u: record type specific data
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* @u.trig: structure zfcp_dbf_rec_trigger
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* @u.run: structure zfcp_dbf_rec_running
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*/
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struct zfcp_dbf_rec {
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u8 id;
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char tag[ZFCP_DBF_TAG_LEN];
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u64 lun;
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u64 wwpn;
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u32 d_id;
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u32 adapter_status;
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u32 port_status;
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u32 lun_status;
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union {
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struct zfcp_dbf_rec_trigger trig;
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struct zfcp_dbf_rec_running run;
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} u;
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} __packed;
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/**
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* enum zfcp_dbf_san_id - SAN trace record identifier
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* @ZFCP_DBF_SAN_REQ: request trace record id
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* @ZFCP_DBF_SAN_RES: response trace record id
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* @ZFCP_DBF_SAN_ELS: extended link service record id
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*/
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enum zfcp_dbf_san_id {
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ZFCP_DBF_SAN_REQ = 1,
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ZFCP_DBF_SAN_RES = 2,
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ZFCP_DBF_SAN_ELS = 3,
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};
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/** struct zfcp_dbf_san - trace record for SAN requests and responses
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* @id: unique number of recovery record type
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* @tag: identifier string specifying the location of initiation
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* @fsf_req_id: request id for fsf requests
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* @payload: unformatted information related to request/response
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* @d_id: destination id
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*/
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struct zfcp_dbf_san {
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u8 id;
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char tag[ZFCP_DBF_TAG_LEN];
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u64 fsf_req_id;
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u32 d_id;
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#define ZFCP_DBF_SAN_MAX_PAYLOAD (FC_CT_HDR_LEN + 32)
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char payload[ZFCP_DBF_SAN_MAX_PAYLOAD];
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u16 pl_len;
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} __packed;
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/**
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* struct zfcp_dbf_hba_res - trace record for hba responses
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* @req_issued: timestamp when request was issued
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* @prot_status: protocol status
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* @prot_status_qual: protocol status qualifier
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* @fsf_status: fsf status
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* @fsf_status_qual: fsf status qualifier
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* @port_handle: handle for port
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* @lun_handle: handle for LUN
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*/
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struct zfcp_dbf_hba_res {
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u64 req_issued;
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u32 prot_status;
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u8 prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
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u32 fsf_status;
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u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
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u32 port_handle;
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u32 lun_handle;
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} __packed;
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/**
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* struct zfcp_dbf_hba_uss - trace record for unsolicited status
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* @status_type: type of unsolicited status
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* @status_subtype: subtype of unsolicited status
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* @d_id: destination ID
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* @lun: logical unit number
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* @queue_designator: queue designator
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*/
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struct zfcp_dbf_hba_uss {
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u32 status_type;
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u32 status_subtype;
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u32 d_id;
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u64 lun;
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u64 queue_designator;
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} __packed;
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/**
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* enum zfcp_dbf_hba_id - HBA trace record identifier
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* @ZFCP_DBF_HBA_RES: response trace record
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* @ZFCP_DBF_HBA_USS: unsolicited status trace record
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* @ZFCP_DBF_HBA_BIT: bit error trace record
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* @ZFCP_DBF_HBA_BASIC: basic adapter event, only trace tag, no other data
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*/
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enum zfcp_dbf_hba_id {
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ZFCP_DBF_HBA_RES = 1,
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ZFCP_DBF_HBA_USS = 2,
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ZFCP_DBF_HBA_BIT = 3,
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ZFCP_DBF_HBA_BASIC = 4,
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};
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/**
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* struct zfcp_dbf_hba - common trace record for HBA records
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* @id: unique number of recovery record type
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* @tag: identifier string specifying the location of initiation
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* @fsf_req_id: request id for fsf requests
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* @fsf_req_status: status of fsf request
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* @fsf_cmd: fsf command
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* @fsf_seq_no: fsf sequence number
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* @pl_len: length of payload stored as zfcp_dbf_pay
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* @u: record type specific data
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* @u.res: data for fsf responses
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* @u.uss: data for unsolicited status buffer
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* @u.be: data for bit error unsolicited status buffer
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*/
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struct zfcp_dbf_hba {
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u8 id;
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char tag[ZFCP_DBF_TAG_LEN];
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u64 fsf_req_id;
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u32 fsf_req_status;
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u32 fsf_cmd;
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u32 fsf_seq_no;
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u16 pl_len;
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union {
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struct zfcp_dbf_hba_res res;
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struct zfcp_dbf_hba_uss uss;
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struct fsf_bit_error_payload be;
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} u;
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} __packed;
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/**
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* enum zfcp_dbf_scsi_id - scsi trace record identifier
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* @ZFCP_DBF_SCSI_CMND: scsi command trace record
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*/
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enum zfcp_dbf_scsi_id {
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ZFCP_DBF_SCSI_CMND = 1,
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};
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/**
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* struct zfcp_dbf_scsi - common trace record for SCSI records
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* @id: unique number of recovery record type
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* @tag: identifier string specifying the location of initiation
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* @scsi_id: scsi device id
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* @scsi_lun: scsi device logical unit number, low part of 64 bit, old 32 bit
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* @scsi_result: scsi result
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* @scsi_retries: current retry number of scsi request
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* @scsi_allowed: allowed retries
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* @fcp_rsp_info: FCP response info code
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* @scsi_opcode: scsi opcode
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* @fsf_req_id: request id of fsf request
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* @host_scribble: LLD specific data attached to SCSI request
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* @pl_len: length of payload stored as zfcp_dbf_pay
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* @fcp_rsp: response for FCP request
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* @scsi_lun_64_hi: scsi device logical unit number, high part of 64 bit
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*/
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struct zfcp_dbf_scsi {
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u8 id;
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char tag[ZFCP_DBF_TAG_LEN];
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u32 scsi_id;
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u32 scsi_lun;
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u32 scsi_result;
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u8 scsi_retries;
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u8 scsi_allowed;
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u8 fcp_rsp_info;
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#define ZFCP_DBF_SCSI_OPCODE 16
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u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
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u64 fsf_req_id;
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u64 host_scribble;
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u16 pl_len;
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struct fcp_resp_with_ext fcp_rsp;
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u32 scsi_lun_64_hi;
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} __packed;
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/**
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* struct zfcp_dbf_pay - trace record for unformatted payload information
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* @area: area this record is originated from
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* @counter: ascending record number
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* @fsf_req_id: request id of fsf request
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* @data: unformatted data
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*/
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struct zfcp_dbf_pay {
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u8 counter;
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char area[ZFCP_DBF_TAG_LEN];
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u64 fsf_req_id;
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#define ZFCP_DBF_PAY_MAX_REC 0x100
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char data[ZFCP_DBF_PAY_MAX_REC];
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} __packed;
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/**
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* struct zfcp_dbf - main dbf trace structure
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* @pay: reference to payload trace area
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* @rec: reference to recovery trace area
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* @hba: reference to hba trace area
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* @san: reference to san trace area
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* @scsi: reference to scsi trace area
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* @pay_lock: lock protecting payload trace buffer
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* @rec_lock: lock protecting recovery trace buffer
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* @hba_lock: lock protecting hba trace buffer
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* @san_lock: lock protecting san trace buffer
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* @scsi_lock: lock protecting scsi trace buffer
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* @pay_buf: pre-allocated buffer for payload
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* @rec_buf: pre-allocated buffer for recovery
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* @hba_buf: pre-allocated buffer for hba
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* @san_buf: pre-allocated buffer for san
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* @scsi_buf: pre-allocated buffer for scsi
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*/
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struct zfcp_dbf {
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debug_info_t *pay;
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debug_info_t *rec;
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debug_info_t *hba;
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debug_info_t *san;
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debug_info_t *scsi;
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spinlock_t pay_lock;
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spinlock_t rec_lock;
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spinlock_t hba_lock;
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spinlock_t san_lock;
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spinlock_t scsi_lock;
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struct zfcp_dbf_pay pay_buf;
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struct zfcp_dbf_rec rec_buf;
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struct zfcp_dbf_hba hba_buf;
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struct zfcp_dbf_san san_buf;
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struct zfcp_dbf_scsi scsi_buf;
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};
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/**
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* zfcp_dbf_hba_fsf_resp_suppress - true if we should not trace by default
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* @req: request that has been completed
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*
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* Returns true if FCP response with only benign residual under count.
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*/
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static inline
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bool zfcp_dbf_hba_fsf_resp_suppress(struct zfcp_fsf_req *req)
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{
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struct fsf_qtcb *qtcb = req->qtcb;
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u32 fsf_stat = qtcb->header.fsf_status;
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struct fcp_resp *fcp_rsp;
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u8 rsp_flags, fr_status;
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if (qtcb->prefix.qtcb_type != FSF_IO_COMMAND)
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return false; /* not an FCP response */
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fcp_rsp = &qtcb->bottom.io.fcp_rsp.iu.resp;
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rsp_flags = fcp_rsp->fr_flags;
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fr_status = fcp_rsp->fr_status;
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return (fsf_stat == FSF_FCP_RSP_AVAILABLE) &&
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(rsp_flags == FCP_RESID_UNDER) &&
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(fr_status == SAM_STAT_GOOD);
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}
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static inline
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void zfcp_dbf_hba_fsf_resp(char *tag, int level, struct zfcp_fsf_req *req)
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{
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if (debug_level_enabled(req->adapter->dbf->hba, level))
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zfcp_dbf_hba_fsf_res(tag, level, req);
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}
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/**
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* zfcp_dbf_hba_fsf_response - trace event for request completion
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* @req: request that has been completed
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*/
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static inline
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void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
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{
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struct fsf_qtcb *qtcb = req->qtcb;
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if (unlikely(req->status & (ZFCP_STATUS_FSFREQ_DISMISSED |
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ZFCP_STATUS_FSFREQ_ERROR))) {
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zfcp_dbf_hba_fsf_resp("fs_rerr", 3, req);
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} else if ((qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
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(qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
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zfcp_dbf_hba_fsf_resp("fs_perr", 1, req);
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} else if (qtcb->header.fsf_status != FSF_GOOD) {
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zfcp_dbf_hba_fsf_resp("fs_ferr",
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zfcp_dbf_hba_fsf_resp_suppress(req)
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? 5 : 1, req);
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} else if ((qtcb->header.fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
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(qtcb->header.fsf_command == FSF_QTCB_OPEN_LUN)) {
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zfcp_dbf_hba_fsf_resp("fs_open", 4, req);
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} else if (qtcb->header.log_length) {
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zfcp_dbf_hba_fsf_resp("fs_qtcb", 5, req);
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} else {
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zfcp_dbf_hba_fsf_resp("fs_norm", 6, req);
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}
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}
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static inline
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void _zfcp_dbf_scsi(char *tag, int level, struct scsi_cmnd *scmd,
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struct zfcp_fsf_req *req)
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{
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struct zfcp_adapter *adapter = (struct zfcp_adapter *)
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scmd->device->host->hostdata[0];
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if (debug_level_enabled(adapter->dbf->scsi, level))
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zfcp_dbf_scsi_common(tag, level, scmd->device, scmd, req);
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}
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/**
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* zfcp_dbf_scsi_result - trace event for SCSI command completion
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* @scmd: SCSI command pointer
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* @req: FSF request used to issue SCSI command
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*/
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static inline
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void zfcp_dbf_scsi_result(struct scsi_cmnd *scmd, struct zfcp_fsf_req *req)
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{
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if (scmd->result != 0)
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_zfcp_dbf_scsi("rsl_err", 3, scmd, req);
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else if (scmd->retries > 0)
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_zfcp_dbf_scsi("rsl_ret", 4, scmd, req);
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else
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_zfcp_dbf_scsi("rsl_nor", 6, scmd, req);
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}
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/**
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* zfcp_dbf_scsi_fail_send - trace event for failure to send SCSI command
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* @scmd: SCSI command pointer
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*/
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static inline
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void zfcp_dbf_scsi_fail_send(struct scsi_cmnd *scmd)
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{
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_zfcp_dbf_scsi("rsl_fai", 4, scmd, NULL);
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}
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/**
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* zfcp_dbf_scsi_abort - trace event for SCSI command abort
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* @tag: tag indicating success or failure of abort operation
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* @scmd: SCSI command to be aborted
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* @fsf_req: request containing abort (might be NULL)
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*/
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static inline
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void zfcp_dbf_scsi_abort(char *tag, struct scsi_cmnd *scmd,
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struct zfcp_fsf_req *fsf_req)
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{
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_zfcp_dbf_scsi(tag, 1, scmd, fsf_req);
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}
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/**
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* zfcp_dbf_scsi_devreset() - Trace event for Logical Unit or Target Reset.
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* @tag: Tag indicating success or failure of reset operation.
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* @sdev: Pointer to SCSI device as context for this event.
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* @flag: Indicates type of reset (Target Reset, Logical Unit Reset).
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* @fsf_req: Pointer to FSF request representing the TMF, or NULL.
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*/
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static inline
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void zfcp_dbf_scsi_devreset(char *tag, struct scsi_device *sdev, u8 flag,
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struct zfcp_fsf_req *fsf_req)
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{
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struct zfcp_adapter *adapter = (struct zfcp_adapter *)
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sdev->host->hostdata[0];
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char tmp_tag[ZFCP_DBF_TAG_LEN];
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static int const level = 1;
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if (unlikely(!debug_level_enabled(adapter->dbf->scsi, level)))
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return;
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if (flag == FCP_TMF_TGT_RESET)
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memcpy(tmp_tag, "tr_", 3);
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else
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memcpy(tmp_tag, "lr_", 3);
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memcpy(&tmp_tag[3], tag, 4);
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zfcp_dbf_scsi_common(tmp_tag, level, sdev, NULL, fsf_req);
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}
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/**
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* zfcp_dbf_scsi_nullcmnd() - trace NULLify of SCSI command in dev/tgt-reset.
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* @scmnd: SCSI command that was NULLified.
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* @fsf_req: request that owned @scmnd.
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*/
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static inline void zfcp_dbf_scsi_nullcmnd(struct scsi_cmnd *scmnd,
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struct zfcp_fsf_req *fsf_req)
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{
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_zfcp_dbf_scsi("scfc__1", 3, scmnd, fsf_req);
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}
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#endif /* ZFCP_DBF_H */
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