/*
*
* linux/drivers/s390/scsi/zfcp_def.h
*
* FCP adapter driver for IBM eServer zSeries
*
* Copyright 2002 IBM Corporation
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Raimund Schroeder <raimund.schroeder@de.ibm.com>
* Aron Zeh <arzeh@de.ibm.com>
* Wolfgang Taphorn <taphorn@de.ibm.com>
* Stefan Bader <stefan.bader@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef ZFCP_DEF_H
#define ZFCP_DEF_H
#ifdef __KERNEL__
/* this drivers version (do not edit !!! generated and updated by cvs) */
#define ZFCP_DEF_REVISION "$Revision: 1.41 $"
/*************************** INCLUDES *****************************************/
#include <linux/blkdev.h>
#include "../../scsi/scsi.h"
#include "../../scsi/hosts.h"
#include "../../fc4/fc.h"
#include "zfcp_fsf.h" /* FSF SW Interface */
#include <asm/ccwdev.h>
#include <asm/qdio.h>
#include <asm/debug.h>
#include <linux/reboot.h>
/************************ DEBUG FLAGS *****************************************/
#define ZFCP_PRINT_FLAGS
#define ZFCP_DEBUG_REQUESTS /* fsf_req tracing */
#define ZFCP_DEBUG_COMMANDS /* host_byte tracing */
#define ZFCP_DEBUG_ABORTS /* scsi_cmnd abort tracing */
#define ZFCP_DEBUG_INCOMING_ELS /* incoming ELS tracing */
#define ZFCP_STAT_REQSIZES
#define ZFCP_STAT_QUEUES
/********************* SCSI SPECIFIC DEFINES *********************************/
/* 32 bit for SCSI ID and LUN as long as the SCSI stack uses this type */
typedef u32 scsi_id_t;
typedef u32 scsi_lun_t;
#define ZFCP_FAKE_SCSI_COMPLETION_TIME (HZ / 3)
#define ZFCP_ERP_SCSI_LOW_MEM_TIMEOUT (100*HZ)
#define ZFCP_SCSI_ER_TIMEOUT (100*HZ)
#define ZFCP_SCSI_HOST_FLUSH_TIMEOUT (1*HZ)
/********************* CIO/QDIO SPECIFIC DEFINES *****************************/
/* Adapter Identification Parameters */
#define ZFCP_CONTROL_UNIT_TYPE 0x1731
#define ZFCP_CONTROL_UNIT_MODEL 0x03
#define ZFCP_DEVICE_TYPE 0x1732
#define ZFCP_DEVICE_MODEL 0x03
/* allow as many chained SBALs as are supported by hardware */
#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ
/* DMQ bug workaround: don't use last SBALE */
#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
/* index of last SBALE (with respect to DMQ bug workaround) */
#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
/* max. number of (data buffer) SBALEs in largest SBAL chain */
#define ZFCP_MAX_SBALES_PER_REQ \
(ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
/* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
/* FIXME(tune): free space should be one max. SBAL chain plus what? */
#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \
- (ZFCP_MAX_SBALS_PER_REQ + 4))
#define ZFCP_SBAL_TIMEOUT (5*HZ)
#define ZFCP_TYPE2_RECOVERY_TIME (8*HZ)
/* queue polling (values in microseconds) */
#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */
#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */
#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */
#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */
#define QDIO_SCSI_QFMT 1 /* 1 for FSF */
/********************* FSF SPECIFIC DEFINES *********************************/
#define ZFCP_ULP_INFO_VERSION 26
#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION
/* ATTENTION: value must not be used by hardware */
#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
#define ZFCP_STATUS_READ_FAILED_THRESHOLD 3
#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM
#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 6
#define ZFCP_EXCHANGE_CONFIG_DATA_SLEEP 50
#define ZFCP_QTCB_SIZE (sizeof(struct fsf_qtcb) + FSF_QTCB_LOG_SIZE)
#define ZFCP_QTCB_AND_REQ_SIZE (sizeof(struct zfcp_fsf_req) + ZFCP_QTCB_SIZE)
/*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
typedef unsigned long long wwn_t;
typedef unsigned int fc_id_t;
typedef unsigned long long fcp_lun_t;
/* data length field may be at variable position in FCP-2 FCP_CMND IU */
typedef unsigned int fcp_dl_t;
#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3
/* timeout for name-server lookup (in seconds) */
#define ZFCP_NAMESERVER_TIMEOUT 10
/* largest SCSI command we can process */
/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */
#define ZFCP_MAX_SCSI_CMND_LENGTH 255
/* maximum number of commands in LUN queue (tagged queueing) */
#define ZFCP_CMND_PER_LUN 32
/* task attribute values in FCP-2 FCP_CMND IU */
#define SIMPLE_Q 0
#define HEAD_OF_Q 1
#define ORDERED_Q 2
#define ACA_Q 4
#define UNTAGGED 5
/* task management flags in FCP-2 FCP_CMND IU */
#define CLEAR_ACA 0x40
#define TARGET_RESET 0x20
#define LOGICAL_UNIT_RESET 0x10
#define CLEAR_TASK_SET 0x04
#define ABORT_TASK_SET 0x02
#define FCP_CDB_LENGTH 16
#define ZFCP_DID_MASK 0x00FFFFFF
/* FCP(-2) FCP_CMND IU */
struct fcp_cmnd_iu {
fcp_lun_t fcp_lun; /* FCP logical unit number */
u8 crn; /* command reference number */
u8 reserved0:5; /* reserved */
u8 task_attribute:3; /* task attribute */
u8 task_management_flags; /* task management flags */
u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
u8 rddata:1; /* read data */
u8 wddata:1; /* write data */
u8 fcp_cdb[FCP_CDB_LENGTH];
} __attribute__((packed));
/* FCP(-2) FCP_RSP IU */
struct fcp_rsp_iu {
u8 reserved0[10];
union {
struct {
u8 reserved1:3;
u8 fcp_conf_req:1;
u8 fcp_resid_under:1;
u8 fcp_resid_over:1;
u8 fcp_sns_len_valid:1;
u8 fcp_rsp_len_valid:1;
} bits;
u8 value;
} validity;
u8 scsi_status;
u32 fcp_resid;
u32 fcp_sns_len;
u32 fcp_rsp_len;
} __attribute__((packed));
#define RSP_CODE_GOOD 0
#define RSP_CODE_LENGTH_MISMATCH 1
#define RSP_CODE_FIELD_INVALID 2
#define RSP_CODE_RO_MISMATCH 3
#define RSP_CODE_TASKMAN_UNSUPP 4
#define RSP_CODE_TASKMAN_FAILED 5
/* see fc-fs */
#define LS_FAN 0x60000000
#define LS_RSCN 0x61040000
struct fcp_rscn_head {
u8 command;
u8 page_length; /* always 0x04 */
u16 payload_len;
} __attribute__((packed));
struct fcp_rscn_element {
u8 reserved:2;
u8 event_qual:4;
u8 addr_format:2;
u32 nport_did:24;
} __attribute__((packed));
#define ZFCP_PORT_ADDRESS 0x0
#define ZFCP_AREA_ADDRESS 0x1
#define ZFCP_DOMAIN_ADDRESS 0x2
#define ZFCP_FABRIC_ADDRESS 0x3
#define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
#define ZFCP_PORTS_RANGE_AREA 0xFFFF00
#define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
#define ZFCP_PORTS_RANGE_FABRIC 0x000000
#define ZFCP_NO_PORTS_PER_AREA 0x100
#define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
#define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
struct fcp_fan {
u32 command;
u32 fport_did;
wwn_t fport_wwpn;
wwn_t fport_wwname;
} __attribute__((packed));
/* see fc-ph */
struct fcp_logo {
u32 command;
u32 nport_did;
wwn_t nport_wwpn;
} __attribute__((packed));
struct fc_ct_iu {
u8 revision; /* 0x01 */
u8 in_id[3]; /* 0x00 */
u8 gs_type; /* 0xFC Directory Service */
u8 gs_subtype; /* 0x02 Name Server */
u8 options; /* 0x10 synchronous/single exchange */
u8 reserved0;
u16 cmd_rsp_code; /* 0x0121 GID_PN */
u16 max_res_size; /* <= (4096 - 16) / 4 */
u8 reserved1;
u8 reason_code;
u8 reason_code_expl;
u8 vendor_unique;
union {
wwn_t wwpn;
fc_id_t d_id;
} data;
} __attribute__ ((packed));
#define ZFCP_CT_REVISION 0x01
#define ZFCP_CT_DIRECTORY_SERVICE 0xFC
#define ZFCP_CT_NAME_SERVER 0x02
#define ZFCP_CT_SYNCHRONOUS 0x00
#define ZFCP_CT_GID_PN 0x0121
#define ZFCP_CT_MAX_SIZE 0x1020
#define ZFCP_CT_ACCEPT 0x8002
/***************** S390 DEBUG FEATURE SPECIFIC DEFINES ***********************/
/* debug feature entries per adapter */
#define ZFCP_ERP_DBF_INDEX 1
#define ZFCP_ERP_DBF_AREAS 2
#define ZFCP_ERP_DBF_LENGTH 16
#define ZFCP_ERP_DBF_LEVEL 3
#define ZFCP_ERP_DBF_NAME "zfcperp"
#define ZFCP_REQ_DBF_INDEX 1
#define ZFCP_REQ_DBF_AREAS 1
#define ZFCP_REQ_DBF_LENGTH 8
#define ZFCP_REQ_DBF_LEVEL 1
#define ZFCP_REQ_DBF_NAME "zfcpreq"
#define ZFCP_CMD_DBF_INDEX 2
#define ZFCP_CMD_DBF_AREAS 1
#define ZFCP_CMD_DBF_LENGTH 8
#define ZFCP_CMD_DBF_LEVEL 3
#define ZFCP_CMD_DBF_NAME "zfcpcmd"
#define ZFCP_ABORT_DBF_INDEX 2
#define ZFCP_ABORT_DBF_AREAS 1
#define ZFCP_ABORT_DBF_LENGTH 8
#define ZFCP_ABORT_DBF_LEVEL 6
#define ZFCP_ABORT_DBF_NAME "zfcpabt"
#define ZFCP_IN_ELS_DBF_INDEX 2
#define ZFCP_IN_ELS_DBF_AREAS 1
#define ZFCP_IN_ELS_DBF_LENGTH 8
#define ZFCP_IN_ELS_DBF_LEVEL 6
#define ZFCP_IN_ELS_DBF_NAME "zfcpels"
#define ZFCP_ADAPTER_REQ_DBF_INDEX 4
#define ZFCP_ADAPTER_REQ_DBF_AREAS 1
#define ZFCP_ADAPTER_REQ_DBF_LENGTH 8
#define ZFCP_ADAPTER_REQ_DBF_LEVEL 6
/******************** LOGGING MACROS AND DEFINES *****************************/
/*
* Logging may be applied on certain kinds of driver operations
* independently. Additionally, different log-levels are supported for
* each of these areas.
*/
#define ZFCP_NAME "zfcp"
/* independent log areas */
#define ZFCP_LOG_AREA_OTHER 0
#define ZFCP_LOG_AREA_SCSI 1
#define ZFCP_LOG_AREA_FSF 2
#define ZFCP_LOG_AREA_CONFIG 3
#define ZFCP_LOG_AREA_CIO 4
#define ZFCP_LOG_AREA_QDIO 5
#define ZFCP_LOG_AREA_ERP 6
#define ZFCP_LOG_AREA_FC 7
/* log level values*/
#define ZFCP_LOG_LEVEL_NORMAL 0
#define ZFCP_LOG_LEVEL_INFO 1
#define ZFCP_LOG_LEVEL_DEBUG 2
#define ZFCP_LOG_LEVEL_TRACE 3
/* default log levels for different log areas */
#define ZFCP_LOG_LEVEL_DEFAULT_OTHER ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_SCSI ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_FSF ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_CONFIG ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_CIO ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_QDIO ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_ERP ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_LEVEL_DEFAULT_FC ZFCP_LOG_LEVEL_INFO
/*
* this allows removal of logging code by the preprocessor
* (the most detailed log level still to be compiled in is specified,
* higher log levels are removed)
*/
#define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE
/* positional "loglevel" nibble assignment */
#define ZFCP_LOG_VALUE(zfcp_lognibble) \
((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF)
#define ZFCP_LOG_VALUE_OTHER ZFCP_LOG_VALUE(ZFCP_LOG_AREA_OTHER)
#define ZFCP_LOG_VALUE_SCSI ZFCP_LOG_VALUE(ZFCP_LOG_AREA_SCSI)
#define ZFCP_LOG_VALUE_FSF ZFCP_LOG_VALUE(ZFCP_LOG_AREA_FSF)
#define ZFCP_LOG_VALUE_CONFIG ZFCP_LOG_VALUE(ZFCP_LOG_AREA_CONFIG)
#define ZFCP_LOG_VALUE_CIO ZFCP_LOG_VALUE(ZFCP_LOG_AREA_CIO)
#define ZFCP_LOG_VALUE_QDIO ZFCP_LOG_VALUE(ZFCP_LOG_AREA_QDIO)
#define ZFCP_LOG_VALUE_ERP ZFCP_LOG_VALUE(ZFCP_LOG_AREA_ERP)
#define ZFCP_LOG_VALUE_FC ZFCP_LOG_VALUE(ZFCP_LOG_AREA_FC)
/* all log-level defaults are combined to generate initial log-level */
#define ZFCP_LOG_LEVEL_DEFAULTS \
((ZFCP_LOG_LEVEL_DEFAULT_OTHER << (ZFCP_LOG_AREA_OTHER<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_SCSI << (ZFCP_LOG_AREA_SCSI<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_FSF << (ZFCP_LOG_AREA_FSF<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_CONFIG << (ZFCP_LOG_AREA_CONFIG<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_CIO << (ZFCP_LOG_AREA_CIO<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_QDIO << (ZFCP_LOG_AREA_QDIO<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_ERP << (ZFCP_LOG_AREA_ERP<<2)) | \
(ZFCP_LOG_LEVEL_DEFAULT_FC << (ZFCP_LOG_AREA_FC<<2)))
/* the prefix placed at the beginning of each driver message */
#define ZFCP_LOG_PREFIX ZFCP_NAME": "
/* log area specific prefixes */
#define ZFCP_LOG_AREA_PREFIX_OTHER ""
#define ZFCP_LOG_AREA_PREFIX_SCSI "SCSI: "
#define ZFCP_LOG_AREA_PREFIX_FSF "FSF: "
#define ZFCP_LOG_AREA_PREFIX_CONFIG "config: "
#define ZFCP_LOG_AREA_PREFIX_CIO "common I/O: "
#define ZFCP_LOG_AREA_PREFIX_QDIO "QDIO: "
#define ZFCP_LOG_AREA_PREFIX_ERP "ERP: "
#define ZFCP_LOG_AREA_PREFIX_FC "FC: "
/* check whether we have the right level for logging */
#define ZFCP_LOG_CHECK(ll) (ZFCP_LOG_VALUE(ZFCP_LOG_AREA)) >= ll
/* As we have two printks it is possible for them to be seperated by another
* message. This holds true even for printks from within this module.
* In any case there should only be a small readability hit, however.
*/
#define _ZFCP_LOG(m...) \
{ \
printk( "%s%s: ", \
ZFCP_LOG_PREFIX ZFCP_LOG_AREA_PREFIX, \
__FUNCTION__); \
printk(m); \
}
#define ZFCP_LOG(ll, m...) \
if (ZFCP_LOG_CHECK(ll)) \
_ZFCP_LOG(m)
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL
#define ZFCP_LOG_NORMAL(m...)
#else /* ZFCP_LOG_LEVEL_LIMIT >= ZFCP_LOG_LEVEL_NORMAL */
#define ZFCP_LOG_NORMAL(m...) ZFCP_LOG(ZFCP_LOG_LEVEL_NORMAL, m)
#endif
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO
#define ZFCP_LOG_INFO(m...)
#else /* ZFCP_LOG_LEVEL_LIMIT >= ZFCP_LOG_LEVEL_INFO */
#define ZFCP_LOG_INFO(m...) ZFCP_LOG(ZFCP_LOG_LEVEL_INFO, m)
#endif
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG
#define ZFCP_LOG_DEBUG(m...)
#else /* ZFCP_LOG_LEVEL_LIMIT >= ZFCP_LOG_LEVEL_DEBUG */
#define ZFCP_LOG_DEBUG(m...) ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, m)
#endif
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE
#define ZFCP_LOG_TRACE(m...)
#else /* ZFCP_LOG_LEVEL_LIMIT >= ZFCP_LOG_LEVEL_TRACE */
#define ZFCP_LOG_TRACE(m...) ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, m)
#endif
#ifdef ZFCP_PRINT_FLAGS
extern u32 flags_dump;
#define ZFCP_LOG_FLAGS(ll, m...) \
if (ll<=flags_dump) \
_ZFCP_LOG(m)
#else
#define ZFCP_LOG_FLAGS(ll, m...)
#endif
/*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
/*
* Note, the leftmost status byte is common among adapter, port
* and unit
*/
#define ZFCP_COMMON_FLAGS 0xff000000
#define ZFCP_SPECIFIC_FLAGS 0x00ffffff
/* common status bits */
#define ZFCP_STATUS_COMMON_REMOVE 0x80000000
#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
#define ZFCP_STATUS_COMMON_OPENING 0x08000000
#define ZFCP_STATUS_COMMON_OPEN 0x04000000
#define ZFCP_STATUS_COMMON_CLOSING 0x02000000
#define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
/* adapter status */
#define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
#define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
#define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
#define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
#define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
#define ZFCP_STATUS_ADAPTER_QUEUECOMMAND_BLOCK 0x00000400
#define ZFCP_STATUS_ADAPTER_SCSI_UP \
(ZFCP_STATUS_COMMON_UNBLOCKED | \
ZFCP_STATUS_ADAPTER_REGISTERED)
#define ZFCP_DID_NAMESERVER 0xFFFFFC
/* remote port status */
#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
#define ZFCP_STATUS_PORT_DID_DID 0x00000002
#define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
#define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
#define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
#define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
#define ZFCP_STATUS_PORT_NAMESERVER \
(ZFCP_STATUS_PORT_NO_WWPN | \
ZFCP_STATUS_PORT_NO_SCSI_ID)
/* logical unit status */
#define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001
/* FSF request status (this does not have a common part) */
#define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
#define ZFCP_STATUS_FSFREQ_POOL 0x00000001
#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
#define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
#define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
#define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
#define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
#define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
#define ZFCP_STATUS_FSFREQ_POOLBUF 0x00002000
/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
#define ZFCP_MAX_ERPS 3
#define ZFCP_ERP_FSFREQ_TIMEOUT (100 * HZ)
#define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
#define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
#define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
#define ZFCP_STATUS_ERP_DISMISSING 0x00100000
#define ZFCP_STATUS_ERP_DISMISSED 0x00200000
#define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
#define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
#define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
#define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
#define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
#define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
#define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
/* Ordered by escalation level (necessary for proper erp-code operation) */
#define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
#define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
#define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
#define ZFCP_ERP_ACTION_RUNNING 0x1
#define ZFCP_ERP_ACTION_READY 0x2
#define ZFCP_ERP_SUCCEEDED 0x0
#define ZFCP_ERP_FAILED 0x1
#define ZFCP_ERP_CONTINUES 0x2
#define ZFCP_ERP_EXIT 0x3
#define ZFCP_ERP_DISMISSED 0x4
#define ZFCP_ERP_NOMEM 0x5
/************************* STRUCTURE DEFINITIONS *****************************/
struct zfcp_fsf_req;
typedef void zfcp_send_generic_handler_t(struct zfcp_fsf_req*);
struct zfcp_adapter_mempool {
mempool_t *status_read_fsf;
mempool_t *status_read_buf;
mempool_t *nameserver;
mempool_t *erp_fsf;
mempool_t *fcp_command_fsf;
struct timer_list fcp_command_fsf_timer;
};
struct zfcp_exchange_config_data{
};
struct zfcp_open_port {
struct zfcp_port *port;
};
struct zfcp_close_port {
struct zfcp_port *port;
};
struct zfcp_open_unit {
struct zfcp_unit *unit;
};
struct zfcp_close_unit {
struct zfcp_unit *unit;
};
struct zfcp_close_physical_port {
struct zfcp_port *port;
};
struct zfcp_send_fcp_command_task {
struct zfcp_fsf_req *fsf_req;
struct zfcp_unit *unit;
Scsi_Cmnd *scsi_cmnd;
unsigned long start_jiffies;
};
struct zfcp_send_fcp_command_task_management {
struct zfcp_unit *unit;
};
struct zfcp_abort_fcp_command {
struct zfcp_fsf_req *fsf_req;
struct zfcp_unit *unit;
};
struct zfcp_send_generic {
struct zfcp_port *port;
char *outbuf;
char *inbuf;
int outbuf_length;
int inbuf_length;
zfcp_send_generic_handler_t *handler;
unsigned long handler_data;
};
struct zfcp_status_read {
struct fsf_status_read_buffer *buffer;
};
/* request specific data */
union zfcp_req_data {
struct zfcp_exchange_config_data exchange_config_data;
struct zfcp_open_port open_port;
struct zfcp_close_port close_port;
struct zfcp_open_unit open_unit;
struct zfcp_close_unit close_unit;
struct zfcp_close_physical_port close_physical_port;
struct zfcp_send_fcp_command_task send_fcp_command_task;
struct zfcp_send_fcp_command_task_management
send_fcp_command_task_management;
struct zfcp_abort_fcp_command abort_fcp_command;
struct zfcp_send_generic send_generic;
struct zfcp_status_read status_read;
};
struct zfcp_qdio_queue {
struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
u8 free_index; /* index of next free bfr
in queue (free_count>0) */
atomic_t free_count; /* number of free buffers
in queue */
rwlock_t queue_lock; /* lock for operations on queue */
int distance_from_int; /* SBALs used since PCI indication
was last set */
};
struct zfcp_erp_action {
struct list_head list;
int action; /* requested action code */
struct zfcp_adapter *adapter; /* device which should be recovered */
struct zfcp_port *port;
struct zfcp_unit *unit;
volatile u32 status; /* recovery status */
u32 step; /* active step of this erp action */
struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
for this action */
struct timer_list timer;
};
struct zfcp_adapter {
u32 common_magic; /* driver common magic */
u32 specific_magic; /* struct specific magic */
struct list_head list; /* list of adapters */
atomic_t refcount; /* reference count */
wait_queue_head_t remove_wq; /* can be used to wait for
refcount drop to zero */
wwn_t wwnn; /* WWNN */
wwn_t wwpn; /* WWPN */
fc_id_t s_id; /* N_Port ID */
struct ccw_device *ccw_device; /* S/390 ccw device */
u8 fc_service_class;
u32 fc_topology; /* FC topology */
u32 fc_link_speed; /* FC interface speed */
u32 hydra_version; /* Hydra version */
u32 fsf_lic_version;
struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
Scsi_Cmnd *first_fake_cmnd; /* Packets in flight list */
rwlock_t fake_list_lock; /* Lock for the above */
struct timer_list fake_scsi_timer; /* Starts processing of
faked commands */
unsigned char name[9];
struct list_head port_list_head; /* remote port list */
struct list_head port_remove_lh; /* head of ports to be
removed */
u32 ports; /* number of remote ports */
scsi_id_t max_scsi_id; /* largest SCSI ID */
scsi_lun_t max_scsi_lun; /* largest SCSI LUN */
struct timer_list scsi_er_timer; /* SCSI err recovery watch */
struct list_head fsf_req_list_head; /* head of FSF req list */
rwlock_t fsf_req_list_lock; /* lock for ops on list of
FSF requests */
atomic_t fsf_reqs_active; /* # active FSF reqs */
atomic_t scsi_reqs_active; /* # active SCSI reqs */
wait_queue_head_t scsi_reqs_active_wq; /* can be used to wait for
fsf_reqs_active chngs */
struct zfcp_qdio_queue request_queue; /* request queue */
u32 fsf_req_seq_no; /* FSF cmnd seq number */
wait_queue_head_t request_wq; /* can be used to wait for
more avaliable SBALs */
struct zfcp_qdio_queue response_queue; /* response queue */
rwlock_t abort_lock; /* Protects against SCSI
stack abort/command
completion races */
u16 status_read_failed; /* # failed status reads */
atomic_t status; /* status of this adapter */
struct list_head erp_ready_head; /* error recovery for this
adapter/devices */
struct list_head erp_running_head;
rwlock_t erp_lock;
struct semaphore erp_ready_sem;
wait_queue_head_t erp_thread_wqh;
wait_queue_head_t erp_done_wqh;
struct zfcp_erp_action erp_action; /* pending error recovery */
atomic_t erp_counter;
struct zfcp_port *nameserver_port; /* adapter's nameserver */
debug_info_t *erp_dbf; /* S/390 debug features */
debug_info_t *abort_dbf;
debug_info_t *req_dbf;
debug_info_t *in_els_dbf;
debug_info_t *cmd_dbf;
rwlock_t cmd_dbf_lock;
struct zfcp_adapter_mempool pool; /* Adapter memory pools */
struct qdio_initialize qdio_init_data; /* for qdio_establish */
};
struct zfcp_port {
u32 common_magic; /* driver wide common magic */
u32 specific_magic; /* structure specific magic */
struct list_head list; /* list of remote ports */
atomic_t refcount; /* reference count */
wait_queue_head_t remove_wq; /* can be used to wait for
refcount drop to zero */
struct zfcp_adapter *adapter; /* adapter used to access port */
struct list_head unit_list_head; /* head of logical unit list */
struct list_head unit_remove_lh; /* head of luns to be removed
list */
u32 units; /* # of logical units in list */
atomic_t status; /* status of this remote port */
scsi_id_t scsi_id; /* own SCSI ID */
wwn_t wwnn; /* WWNN if known */
wwn_t wwpn; /* WWPN */
fc_id_t d_id; /* D_ID */
scsi_lun_t max_scsi_lun; /* largest SCSI LUN */
u32 handle; /* handle assigned by FSF */
struct zfcp_erp_action erp_action; /* pending error recovery */
atomic_t erp_counter;
struct device sysfs_device; /* sysfs device */
};
struct zfcp_unit {
u32 common_magic; /* driver wide common magic */
u32 specific_magic; /* structure specific magic */
struct list_head list; /* list of logical units */
atomic_t refcount; /* reference count */
wait_queue_head_t remove_wq; /* can be used to wait for
refcount drop to zero */
struct zfcp_port *port; /* remote port of unit */
atomic_t status; /* status of this logical unit */
scsi_lun_t scsi_lun; /* own SCSI LUN */
fcp_lun_t fcp_lun; /* own FCP_LUN */
u32 handle; /* handle assigned by FSF */
Scsi_Device *device; /* scsi device struct pointer */
struct zfcp_erp_action erp_action; /* pending error recovery */
atomic_t erp_counter;
struct device sysfs_device; /* sysfs device */
};
/* FSF request */
struct zfcp_fsf_req {
u32 common_magic; /* driver wide common magic */
u32 specific_magic; /* structure specific magic */
struct list_head list; /* list of FSF requests */
struct zfcp_adapter *adapter; /* adapter request belongs to */
u8 sbal_count; /* # of SBALs in FSF request */
u8 sbal_index; /* position of 1st SBAL */
wait_queue_head_t completion_wq; /* can be used by a routine
to wait for completion */
volatile u32 status; /* status of this request */
u32 fsf_command; /* FSF Command copy */
struct fsf_qtcb *qtcb; /* address of associated QTCB */
u32 seq_no; /* Sequence number of request */
union zfcp_req_data data; /* Info fields of request */
struct zfcp_erp_action *erp_action; /* used if this request is
issued on behalf of erp */
};
typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
/* driver data */
struct zfcp_data {
Scsi_Host_Template scsi_host_template;
atomic_t status; /* Module status flags */
struct list_head adapter_list_head; /* head of adapter list */
struct list_head adapter_remove_lh; /* head of adapters to be
removed */
rwlock_t status_read_lock; /* for status read thread */
struct list_head status_read_receive_head;
struct list_head status_read_send_head;
struct semaphore status_read_sema;
wait_queue_head_t status_read_thread_wqh;
u16 adapters; /* # of adapters in list */
rwlock_t config_lock; /* serialises changes
to adapter/port/unit
lists */
struct semaphore config_sema; /* serialises configuration
changes */
struct notifier_block reboot_notifier; /* used to register cleanup
functions */
atomic_t loglevel; /* current loglevel */
#ifdef ZFCP_STAT_REQSIZES /* Statistical accounting
of processed data */
struct list_head read_req_head;
struct list_head write_req_head;
struct list_head read_sg_head;
struct list_head write_sg_head;
struct list_head read_sguse_head;
struct list_head write_sguse_head;
unsigned long stat_errors;
rwlock_t stat_lock;
#endif
#ifdef ZFCP_STAT_QUEUES
atomic_t outbound_queue_full;
atomic_t outbound_total;
#endif
};
#ifdef ZFCP_STAT_REQSIZES
struct zfcp_statistics {
struct list_head list;
u32 num;
u32 occurrence;
};
#endif
/********************** ZFCP SPECIFIC DEFINES ********************************/
#define ZFCP_FSFREQ_CLEANUP_TIMEOUT HZ/10
#define ZFCP_KNOWN 0x00000001
#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
#define ZFCP_WAIT_FOR_SBAL 0x00000004
#define ZFCP_SET 0x00000100
#define ZFCP_CLEAR 0x00000200
#define ZFCP_INTERRUPTIBLE 1
#define ZFCP_UNINTERRUPTIBLE 0
/* some magics which may be used to authenticate data structures */
#define ZFCP_MAGIC 0xFCFCFCFC
#define ZFCP_MAGIC_ADAPTER 0xAAAAAAAA
#define ZFCP_MAGIC_PORT 0xBBBBBBBB
#define ZFCP_MAGIC_UNIT 0xCCCCCCCC
#define ZFCP_MAGIC_FSFREQ 0xEEEEEEEE
#ifndef atomic_test_mask
#define atomic_test_mask(mask, target) \
(atomic_read(target) & mask)
#endif
extern void _zfcp_hex_dump(char *, int);
#define ZFCP_HEX_DUMP(level, addr, count) \
if (ZFCP_LOG_CHECK(level)) { \
_zfcp_hex_dump(addr, count); \
}
/*
* Not yet optimal but useful:
* Waits until the condition is met or the timeout occurs.
* The condition may be a function call. This allows to
* execute some additional instructions in addition
* to a simple condition check.
* The timeout is modified on exit and holds the remaining time.
* Thus it is zero if a timeout ocurred, i.e. the condition was
* not met in the specified interval.
*/
#define __ZFCP_WAIT_EVENT_TIMEOUT(timeout, condition) \
do { \
set_current_state(TASK_UNINTERRUPTIBLE); \
while (!(condition) && timeout) \
timeout = schedule_timeout(timeout); \
current->state = TASK_RUNNING; \
} while (0);
#define ZFCP_WAIT_EVENT_TIMEOUT(waitqueue, timeout, condition) \
do { \
wait_queue_t entry; \
init_waitqueue_entry(&entry, current); \
add_wait_queue(&waitqueue, &entry); \
__ZFCP_WAIT_EVENT_TIMEOUT(timeout, condition) \
remove_wait_queue(&waitqueue, &entry); \
} while (0);
#define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
#define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
#define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
/*
* functions needed for reference/usage counting
*/
static inline void
zfcp_unit_get(struct zfcp_unit *unit)
{
atomic_inc(&unit->refcount);
}
static inline void
zfcp_unit_put(struct zfcp_unit *unit)
{
if (atomic_dec_return(&unit->refcount) == 0)
wake_up(&unit->remove_wq);
}
static inline void
zfcp_unit_wait(struct zfcp_unit *unit)
{
wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
}
static inline void
zfcp_port_get(struct zfcp_port *port)
{
atomic_inc(&port->refcount);
}
static inline void
zfcp_port_put(struct zfcp_port *port)
{
if (atomic_dec_return(&port->refcount) == 0)
wake_up(&port->remove_wq);
}
static inline void
zfcp_port_wait(struct zfcp_port *port)
{
wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
}
static inline void
zfcp_adapter_get(struct zfcp_adapter *adapter)
{
atomic_inc(&adapter->refcount);
}
static inline void
zfcp_adapter_put(struct zfcp_adapter *adapter)
{
if (atomic_dec_return(&adapter->refcount) == 0)
wake_up(&adapter->remove_wq);
}
static inline void
zfcp_adapter_wait(struct zfcp_adapter *adapter)
{
wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
}
#endif /* __KERNEL_- */
#endif /* ZFCP_DEF_H */
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