351 lines
8.6 KiB
C
351 lines
8.6 KiB
C
/*
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* This file is part of the zfcp device driver for
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* FCP adapters for IBM System z9 and zSeries.
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*
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* Copyright IBM Corp. 2008, 2009
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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 "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_SIZE 4
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#define ZFCP_DBF_ID_SIZE 7
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struct zfcp_dbf_dump {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u32 total_size; /* size of total dump data */
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u32 offset; /* how much data has being already dumped */
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u32 size; /* how much data comes with this record */
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u8 data[]; /* dump data */
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} __attribute__ ((packed));
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struct zfcp_dbf_rec_record_thread {
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u32 total;
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u32 ready;
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u32 running;
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};
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struct zfcp_dbf_rec_record_target {
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u64 ref;
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u32 status;
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u32 d_id;
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u64 wwpn;
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u64 fcp_lun;
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u32 erp_count;
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};
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struct zfcp_dbf_rec_record_trigger {
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u8 want;
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u8 need;
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u32 as;
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u32 ps;
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u32 us;
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u64 ref;
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u64 action;
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u64 wwpn;
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u64 fcp_lun;
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};
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struct zfcp_dbf_rec_record_action {
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u32 status;
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u32 step;
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u64 action;
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u64 fsf_req;
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};
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struct zfcp_dbf_rec_record {
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u8 id;
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char id2[7];
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union {
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struct zfcp_dbf_rec_record_action action;
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struct zfcp_dbf_rec_record_thread thread;
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struct zfcp_dbf_rec_record_target target;
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struct zfcp_dbf_rec_record_trigger trigger;
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} u;
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};
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enum {
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ZFCP_REC_DBF_ID_ACTION,
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ZFCP_REC_DBF_ID_THREAD,
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ZFCP_REC_DBF_ID_TARGET,
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ZFCP_REC_DBF_ID_TRIGGER,
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};
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struct zfcp_dbf_hba_record_response {
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u32 fsf_command;
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u64 fsf_reqid;
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u32 fsf_seqno;
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u64 fsf_issued;
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u32 fsf_prot_status;
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u32 fsf_status;
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u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
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u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
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u32 fsf_req_status;
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u8 sbal_first;
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u8 sbal_last;
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u8 sbal_response;
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u8 pool;
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u64 erp_action;
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union {
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struct {
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u64 cmnd;
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u64 serial;
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} fcp;
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struct {
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u64 wwpn;
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u32 d_id;
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u32 port_handle;
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} port;
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struct {
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u64 wwpn;
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u64 fcp_lun;
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u32 port_handle;
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u32 lun_handle;
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} unit;
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struct {
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u32 d_id;
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u8 ls_code;
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} els;
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} u;
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} __attribute__ ((packed));
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struct zfcp_dbf_hba_record_status {
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u8 failed;
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u32 status_type;
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u32 status_subtype;
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struct fsf_queue_designator
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queue_designator;
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u32 payload_size;
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#define ZFCP_DBF_UNSOL_PAYLOAD 80
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#define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32
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#define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56
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#define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32)
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u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
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} __attribute__ ((packed));
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struct zfcp_dbf_hba_record_qdio {
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u32 qdio_error;
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u8 sbal_index;
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u8 sbal_count;
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} __attribute__ ((packed));
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struct zfcp_dbf_hba_record {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u8 tag2[ZFCP_DBF_TAG_SIZE];
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union {
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struct zfcp_dbf_hba_record_response response;
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struct zfcp_dbf_hba_record_status status;
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struct zfcp_dbf_hba_record_qdio qdio;
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struct fsf_bit_error_payload berr;
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} u;
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} __attribute__ ((packed));
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struct zfcp_dbf_san_record_ct_request {
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u16 cmd_req_code;
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u8 revision;
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u8 gs_type;
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u8 gs_subtype;
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u8 options;
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u16 max_res_size;
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u32 len;
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} __attribute__ ((packed));
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struct zfcp_dbf_san_record_ct_response {
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u16 cmd_rsp_code;
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u8 revision;
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u8 reason_code;
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u8 expl;
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u8 vendor_unique;
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u16 max_res_size;
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u32 len;
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} __attribute__ ((packed));
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struct zfcp_dbf_san_record_els {
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u8 ls_code;
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u32 len;
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} __attribute__ ((packed));
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struct zfcp_dbf_san_record {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u64 fsf_reqid;
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u32 fsf_seqno;
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u32 s_id;
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u32 d_id;
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union {
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struct zfcp_dbf_san_record_ct_request ct_req;
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struct zfcp_dbf_san_record_ct_response ct_resp;
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struct zfcp_dbf_san_record_els els;
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} u;
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#define ZFCP_DBF_SAN_MAX_PAYLOAD 1024
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u8 payload[32];
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} __attribute__ ((packed));
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struct zfcp_dbf_scsi_record {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u8 tag2[ZFCP_DBF_TAG_SIZE];
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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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u64 scsi_cmnd;
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u64 scsi_serial;
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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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u8 scsi_retries;
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u8 scsi_allowed;
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u64 fsf_reqid;
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u32 fsf_seqno;
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u64 fsf_issued;
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u64 old_fsf_reqid;
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u8 rsp_validity;
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u8 rsp_scsi_status;
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u32 rsp_resid;
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u8 rsp_code;
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#define ZFCP_DBF_SCSI_FCP_SNS_INFO 16
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#define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256
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u32 sns_info_len;
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u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
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} __attribute__ ((packed));
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struct zfcp_dbf {
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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 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_rec_record rec_buf;
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struct zfcp_dbf_hba_record hba_buf;
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struct zfcp_dbf_san_record san_buf;
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struct zfcp_dbf_scsi_record scsi_buf;
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struct zfcp_adapter *adapter;
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};
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static inline
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void zfcp_dbf_hba_fsf_resp(const char *tag2, int level,
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struct zfcp_fsf_req *req, struct zfcp_dbf *dbf)
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{
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if (level <= dbf->hba->level)
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_zfcp_dbf_hba_fsf_response(tag2, level, req, dbf);
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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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* @fsf_req: request that has been completed
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*/
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static inline void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
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{
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struct zfcp_dbf *dbf = req->adapter->dbf;
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struct fsf_qtcb *qtcb = req->qtcb;
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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("perr", 1, req, dbf);
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} else if (qtcb->header.fsf_status != FSF_GOOD) {
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zfcp_dbf_hba_fsf_resp("ferr", 1, req, dbf);
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} else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
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(req->fsf_command == FSF_QTCB_OPEN_LUN)) {
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zfcp_dbf_hba_fsf_resp("open", 4, req, dbf);
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} else if (qtcb->header.log_length) {
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zfcp_dbf_hba_fsf_resp("qtcb", 5, req, dbf);
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} else {
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zfcp_dbf_hba_fsf_resp("norm", 6, req, dbf);
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}
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}
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/**
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* zfcp_dbf_hba_fsf_unsol - trace event for an unsolicited status buffer
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* @tag: tag indicating which kind of unsolicited status has been received
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* @dbf: reference to dbf structure
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* @status_buffer: buffer containing payload of unsolicited status
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*/
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static inline
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void zfcp_dbf_hba_fsf_unsol(const char *tag, struct zfcp_dbf *dbf,
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struct fsf_status_read_buffer *buf)
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{
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int level = 2;
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if (level <= dbf->hba->level)
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_zfcp_dbf_hba_fsf_unsol(tag, level, dbf, buf);
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}
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static inline
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void zfcp_dbf_scsi(const char *tag, const char *tag2, int level,
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struct zfcp_dbf *dbf, struct scsi_cmnd *scmd,
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struct zfcp_fsf_req *req, unsigned long old_id)
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{
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if (level <= dbf->scsi->level)
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_zfcp_dbf_scsi(tag, tag2, level, dbf, scmd, req, old_id);
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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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* @tag: tag indicating success or failure of SCSI command
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* @level: trace level applicable for this event
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* @adapter: adapter that has been used to issue the SCSI command
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* @scmd: SCSI command pointer
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* @fsf_req: request used to issue SCSI command (might be NULL)
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*/
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static inline
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void zfcp_dbf_scsi_result(const char *tag, int level, struct zfcp_dbf *dbf,
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struct scsi_cmnd *scmd, struct zfcp_fsf_req *fsf_req)
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{
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zfcp_dbf_scsi("rslt", tag, level, dbf, scmd, fsf_req, 0);
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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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* @adapter: adapter thas has been used to issue SCSI command to be aborted
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* @scmd: SCSI command to be aborted
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* @new_req: request containing abort (might be NULL)
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* @old_id: identifier of request containg SCSI command to be aborted
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*/
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static inline
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void zfcp_dbf_scsi_abort(const char *tag, struct zfcp_dbf *dbf,
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struct scsi_cmnd *scmd, struct zfcp_fsf_req *new_req,
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unsigned long old_id)
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{
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zfcp_dbf_scsi("abrt", tag, 1, dbf, scmd, new_req, old_id);
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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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* @flag: indicates type of reset (Target Reset, Logical Unit Reset)
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* @unit: unit that needs reset
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* @scsi_cmnd: SCSI command which caused this error recovery
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*/
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static inline
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void zfcp_dbf_scsi_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
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struct scsi_cmnd *scsi_cmnd)
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{
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zfcp_dbf_scsi(flag == FCP_TARGET_RESET ? "trst" : "lrst", tag, 1,
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unit->port->adapter->dbf, scsi_cmnd, NULL, 0);
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}
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#endif /* ZFCP_DBF_H */
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