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linux/drivers/scsi/ibmvscsi/ibmvfc.h
Brian King 10e794996e [SCSI] ibmvfc: Fix target initialization failure retry handling 
If the ibmvfc driver is in discovery attempting to log into a target
and it encounters an error, the command may get retried one or more
times, depending on the error received. If the retries are
unsuccessful such that the discovery thread gives up on discovery to
that target, the target ends up in a state where, if SCSI core had
previously known about the device, the host will get unblocked but the
host will not be logged into the target, causing any commands sent to
the target to fail. This patch fixes this so that if this occurs, the
target is deleted such that the normal dev_loss processing can occur
instead.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-12-29 11:24:13 -06:00

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/*
* ibmvfc.h -- driver for IBM Power Virtual Fibre Channel Adapter
*
* Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation
*
* Copyright (C) IBM Corporation, 2008
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _IBMVFC_H
#define _IBMVFC_H
#include <linux/list.h>
#include <linux/types.h>
#include "viosrp.h"
#define IBMVFC_NAME "ibmvfc"
#define IBMVFC_DRIVER_VERSION "1.0.2"
#define IBMVFC_DRIVER_DATE "(August 14, 2008)"
#define IBMVFC_DEFAULT_TIMEOUT 15
#define IBMVFC_INIT_TIMEOUT 30
#define IBMVFC_MAX_REQUESTS_DEFAULT 100
#define IBMVFC_DEBUG 0
#define IBMVFC_MAX_TARGETS 1024
#define IBMVFC_MAX_LUN 0xffffffff
#define IBMVFC_MAX_SECTORS 0xffffu
#define IBMVFC_MAX_DISC_THREADS 4
#define IBMVFC_TGT_MEMPOOL_SZ 64
#define IBMVFC_MAX_CMDS_PER_LUN 64
#define IBMVFC_MAX_INIT_RETRIES 3
#define IBMVFC_DEV_LOSS_TMO (5 * 60)
#define IBMVFC_DEFAULT_LOG_LEVEL 2
#define IBMVFC_MAX_CDB_LEN 16
/*
* Ensure we have resources for ERP and initialization:
* 1 for ERP
* 1 for initialization
* 1 for each discovery thread
*/
#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + disc_threads)
#define IBMVFC_MAD_SUCCESS 0x00
#define IBMVFC_MAD_NOT_SUPPORTED 0xF1
#define IBMVFC_MAD_FAILED 0xF7
#define IBMVFC_MAD_DRIVER_FAILED 0xEE
#define IBMVFC_MAD_CRQ_ERROR 0xEF
enum ibmvfc_crq_valid {
IBMVFC_CRQ_CMD_RSP = 0x80,
IBMVFC_CRQ_INIT_RSP = 0xC0,
IBMVFC_CRQ_XPORT_EVENT = 0xFF,
};
enum ibmvfc_crq_format {
IBMVFC_CRQ_INIT = 0x01,
IBMVFC_CRQ_INIT_COMPLETE = 0x02,
IBMVFC_PARTITION_MIGRATED = 0x06,
};
enum ibmvfc_cmd_status_flags {
IBMVFC_FABRIC_MAPPED = 0x0001,
IBMVFC_VIOS_FAILURE = 0x0002,
IBMVFC_FC_FAILURE = 0x0004,
IBMVFC_FC_SCSI_ERROR = 0x0008,
IBMVFC_HW_EVENT_LOGGED = 0x0010,
IBMVFC_VIOS_LOGGED = 0x0020,
};
enum ibmvfc_fabric_mapped_errors {
IBMVFC_UNABLE_TO_ESTABLISH = 0x0001,
IBMVFC_XPORT_FAULT = 0x0002,
IBMVFC_CMD_TIMEOUT = 0x0003,
IBMVFC_ENETDOWN = 0x0004,
IBMVFC_HW_FAILURE = 0x0005,
IBMVFC_LINK_DOWN_ERR = 0x0006,
IBMVFC_LINK_DEAD_ERR = 0x0007,
IBMVFC_UNABLE_TO_REGISTER = 0x0008,
IBMVFC_XPORT_BUSY = 0x000A,
IBMVFC_XPORT_DEAD = 0x000B,
IBMVFC_CONFIG_ERROR = 0x000C,
IBMVFC_NAME_SERVER_FAIL = 0x000D,
IBMVFC_LINK_HALTED = 0x000E,
IBMVFC_XPORT_GENERAL = 0x8000,
};
enum ibmvfc_vios_errors {
IBMVFC_CRQ_FAILURE = 0x0001,
IBMVFC_SW_FAILURE = 0x0002,
IBMVFC_INVALID_PARAMETER = 0x0003,
IBMVFC_MISSING_PARAMETER = 0x0004,
IBMVFC_HOST_IO_BUS = 0x0005,
IBMVFC_TRANS_CANCELLED = 0x0006,
IBMVFC_TRANS_CANCELLED_IMPLICIT = 0x0007,
IBMVFC_INSUFFICIENT_RESOURCE = 0x0008,
IBMVFC_COMMAND_FAILED = 0x8000,
};
enum ibmvfc_mad_types {
IBMVFC_NPIV_LOGIN = 0x0001,
IBMVFC_DISC_TARGETS = 0x0002,
IBMVFC_PORT_LOGIN = 0x0004,
IBMVFC_PROCESS_LOGIN = 0x0008,
IBMVFC_QUERY_TARGET = 0x0010,
IBMVFC_IMPLICIT_LOGOUT = 0x0040,
IBMVFC_PASSTHRU = 0x0200,
IBMVFC_TMF_MAD = 0x0100,
};
struct ibmvfc_mad_common {
u32 version;
u32 reserved;
u32 opcode;
u16 status;
u16 length;
u64 tag;
}__attribute__((packed, aligned (8)));
struct ibmvfc_npiv_login_mad {
struct ibmvfc_mad_common common;
struct srp_direct_buf buffer;
}__attribute__((packed, aligned (8)));
#define IBMVFC_MAX_NAME 256
struct ibmvfc_npiv_login {
u32 ostype;
#define IBMVFC_OS_LINUX 0x02
u32 pad;
u64 max_dma_len;
u32 max_payload;
u32 max_response;
u32 partition_num;
u32 vfc_frame_version;
u16 fcp_version;
u16 flags;
#define IBMVFC_CLIENT_MIGRATED 0x01
#define IBMVFC_FLUSH_ON_HALT 0x02
u32 max_cmds;
u64 capabilities;
#define IBMVFC_CAN_MIGRATE 0x01
u64 node_name;
struct srp_direct_buf async;
u8 partition_name[IBMVFC_MAX_NAME];
u8 device_name[IBMVFC_MAX_NAME];
u8 drc_name[IBMVFC_MAX_NAME];
u64 reserved2[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_common_svc_parms {
u16 fcph_version;
u16 b2b_credit;
u16 features;
u16 bb_rcv_sz; /* upper nibble is BB_SC_N */
u32 ratov;
u32 edtov;
}__attribute__((packed, aligned (4)));
struct ibmvfc_service_parms {
struct ibmvfc_common_svc_parms common;
u8 port_name[8];
u8 node_name[8];
u32 class1_parms[4];
u32 class2_parms[4];
u32 class3_parms[4];
u32 obsolete[4];
u32 vendor_version[4];
u32 services_avail[2];
u32 ext_len;
u32 reserved[30];
u32 clk_sync_qos[2];
}__attribute__((packed, aligned (4)));
struct ibmvfc_npiv_login_resp {
u32 version;
u16 status;
u16 error;
u32 flags;
#define IBMVFC_NATIVE_FC 0x01
#define IBMVFC_CAN_FLUSH_ON_HALT 0x08
u32 reserved;
u64 capabilites;
u32 max_cmds;
u32 scsi_id_sz;
u64 max_dma_len;
u64 scsi_id;
u64 port_name;
u64 node_name;
u64 link_speed;
u8 partition_name[IBMVFC_MAX_NAME];
u8 device_name[IBMVFC_MAX_NAME];
u8 port_loc_code[IBMVFC_MAX_NAME];
u8 drc_name[IBMVFC_MAX_NAME];
struct ibmvfc_service_parms service_parms;
u64 reserved2;
}__attribute__((packed, aligned (8)));
union ibmvfc_npiv_login_data {
struct ibmvfc_npiv_login login;
struct ibmvfc_npiv_login_resp resp;
}__attribute__((packed, aligned (8)));
struct ibmvfc_discover_targets_buf {
u32 scsi_id[1];
#define IBMVFC_DISC_TGT_SCSI_ID_MASK 0x00ffffff
};
struct ibmvfc_discover_targets {
struct ibmvfc_mad_common common;
struct srp_direct_buf buffer;
u32 flags;
u16 status;
u16 error;
u32 bufflen;
u32 num_avail;
u32 num_written;
u64 reserved[2];
}__attribute__((packed, aligned (8)));
enum ibmvfc_fc_reason {
IBMVFC_INVALID_ELS_CMD_CODE = 0x01,
IBMVFC_INVALID_VERSION = 0x02,
IBMVFC_LOGICAL_ERROR = 0x03,
IBMVFC_INVALID_CT_IU_SIZE = 0x04,
IBMVFC_LOGICAL_BUSY = 0x05,
IBMVFC_PROTOCOL_ERROR = 0x07,
IBMVFC_UNABLE_TO_PERFORM_REQ = 0x09,
IBMVFC_CMD_NOT_SUPPORTED = 0x0B,
IBMVFC_SERVER_NOT_AVAIL = 0x0D,
IBMVFC_CMD_IN_PROGRESS = 0x0E,
IBMVFC_VENDOR_SPECIFIC = 0xFF,
};
enum ibmvfc_fc_type {
IBMVFC_FABRIC_REJECT = 0x01,
IBMVFC_PORT_REJECT = 0x02,
IBMVFC_LS_REJECT = 0x03,
IBMVFC_FABRIC_BUSY = 0x04,
IBMVFC_PORT_BUSY = 0x05,
IBMVFC_BASIC_REJECT = 0x06,
};
enum ibmvfc_gs_explain {
IBMVFC_PORT_NAME_NOT_REG = 0x02,
};
struct ibmvfc_port_login {
struct ibmvfc_mad_common common;
u64 scsi_id;
u16 reserved;
u16 fc_service_class;
u32 blksz;
u32 hdr_per_blk;
u16 status;
u16 error; /* also fc_reason */
u16 fc_explain;
u16 fc_type;
u32 reserved2;
struct ibmvfc_service_parms service_parms;
struct ibmvfc_service_parms service_parms_change;
u64 reserved3[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_prli_svc_parms {
u8 type;
#define IBMVFC_SCSI_FCP_TYPE 0x08
u8 type_ext;
u16 flags;
#define IBMVFC_PRLI_ORIG_PA_VALID 0x8000
#define IBMVFC_PRLI_RESP_PA_VALID 0x4000
#define IBMVFC_PRLI_EST_IMG_PAIR 0x2000
u32 orig_pa;
u32 resp_pa;
u32 service_parms;
#define IBMVFC_PRLI_TASK_RETRY 0x00000200
#define IBMVFC_PRLI_RETRY 0x00000100
#define IBMVFC_PRLI_DATA_OVERLAY 0x00000040
#define IBMVFC_PRLI_INITIATOR_FUNC 0x00000020
#define IBMVFC_PRLI_TARGET_FUNC 0x00000010
#define IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED 0x00000002
#define IBMVFC_PRLI_WR_FCP_XFER_RDY_DISABLED 0x00000001
}__attribute__((packed, aligned (4)));
struct ibmvfc_process_login {
struct ibmvfc_mad_common common;
u64 scsi_id;
struct ibmvfc_prli_svc_parms parms;
u8 reserved[48];
u16 status;
u16 error; /* also fc_reason */
u32 reserved2;
u64 reserved3[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_query_tgt {
struct ibmvfc_mad_common common;
u64 wwpn;
u64 scsi_id;
u16 status;
u16 error;
u16 fc_explain;
u16 fc_type;
u64 reserved[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_implicit_logout {
struct ibmvfc_mad_common common;
u64 old_scsi_id;
u64 reserved[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_tmf {
struct ibmvfc_mad_common common;
u64 scsi_id;
struct scsi_lun lun;
u32 flags;
#define IBMVFC_TMF_ABORT_TASK 0x02
#define IBMVFC_TMF_ABORT_TASK_SET 0x04
#define IBMVFC_TMF_LUN_RESET 0x10
#define IBMVFC_TMF_TGT_RESET 0x20
#define IBMVFC_TMF_LUA_VALID 0x40
u32 cancel_key;
u32 my_cancel_key;
u32 pad;
u64 reserved[2];
}__attribute__((packed, aligned (8)));
enum ibmvfc_fcp_rsp_info_codes {
RSP_NO_FAILURE = 0x00,
RSP_TMF_REJECTED = 0x04,
RSP_TMF_FAILED = 0x05,
RSP_TMF_INVALID_LUN = 0x09,
};
struct ibmvfc_fcp_rsp_info {
u16 reserved;
u8 rsp_code;
u8 reserved2[4];
}__attribute__((packed, aligned (2)));
enum ibmvfc_fcp_rsp_flags {
FCP_BIDI_RSP = 0x80,
FCP_BIDI_READ_RESID_UNDER = 0x40,
FCP_BIDI_READ_RESID_OVER = 0x20,
FCP_CONF_REQ = 0x10,
FCP_RESID_UNDER = 0x08,
FCP_RESID_OVER = 0x04,
FCP_SNS_LEN_VALID = 0x02,
FCP_RSP_LEN_VALID = 0x01,
};
union ibmvfc_fcp_rsp_data {
struct ibmvfc_fcp_rsp_info info;
u8 sense[SCSI_SENSE_BUFFERSIZE + sizeof(struct ibmvfc_fcp_rsp_info)];
}__attribute__((packed, aligned (8)));
struct ibmvfc_fcp_rsp {
u64 reserved;
u16 retry_delay_timer;
u8 flags;
u8 scsi_status;
u32 fcp_resid;
u32 fcp_sense_len;
u32 fcp_rsp_len;
union ibmvfc_fcp_rsp_data data;
}__attribute__((packed, aligned (8)));
enum ibmvfc_cmd_flags {
IBMVFC_SCATTERLIST = 0x0001,
IBMVFC_NO_MEM_DESC = 0x0002,
IBMVFC_READ = 0x0004,
IBMVFC_WRITE = 0x0008,
IBMVFC_TMF = 0x0080,
IBMVFC_CLASS_3_ERR = 0x0100,
};
enum ibmvfc_fc_task_attr {
IBMVFC_SIMPLE_TASK = 0x00,
IBMVFC_HEAD_OF_QUEUE = 0x01,
IBMVFC_ORDERED_TASK = 0x02,
IBMVFC_ACA_TASK = 0x04,
};
enum ibmvfc_fc_tmf_flags {
IBMVFC_ABORT_TASK_SET = 0x02,
IBMVFC_LUN_RESET = 0x10,
IBMVFC_TARGET_RESET = 0x20,
};
struct ibmvfc_fcp_cmd_iu {
struct scsi_lun lun;
u8 crn;
u8 pri_task_attr;
u8 tmf_flags;
u8 add_cdb_len;
#define IBMVFC_RDDATA 0x02
#define IBMVFC_WRDATA 0x01
u8 cdb[IBMVFC_MAX_CDB_LEN];
u32 xfer_len;
}__attribute__((packed, aligned (4)));
struct ibmvfc_cmd {
u64 task_tag;
u32 frame_type;
u32 payload_len;
u32 resp_len;
u32 adapter_resid;
u16 status;
u16 error;
u16 flags;
u16 response_flags;
#define IBMVFC_ADAPTER_RESID_VALID 0x01
u32 cancel_key;
u32 exchange_id;
struct srp_direct_buf ext_func;
struct srp_direct_buf ioba;
struct srp_direct_buf resp;
u64 correlation;
u64 tgt_scsi_id;
u64 tag;
u64 reserved3[2];
struct ibmvfc_fcp_cmd_iu iu;
struct ibmvfc_fcp_rsp rsp;
}__attribute__((packed, aligned (8)));
struct ibmvfc_passthru_fc_iu {
u32 payload[7];
#define IBMVFC_ADISC 0x52000000
u32 response[7];
};
struct ibmvfc_passthru_iu {
u64 task_tag;
u32 cmd_len;
u32 rsp_len;
u16 status;
u16 error;
u32 flags;
#define IBMVFC_FC_ELS 0x01
u32 cancel_key;
u32 reserved;
struct srp_direct_buf cmd;
struct srp_direct_buf rsp;
u64 correlation;
u64 scsi_id;
u64 tag;
u64 reserved2[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_passthru_mad {
struct ibmvfc_mad_common common;
struct srp_direct_buf cmd_ioba;
struct ibmvfc_passthru_iu iu;
struct ibmvfc_passthru_fc_iu fc_iu;
}__attribute__((packed, aligned (8)));
struct ibmvfc_trace_start_entry {
u32 xfer_len;
}__attribute__((packed));
struct ibmvfc_trace_end_entry {
u16 status;
u16 error;
u8 fcp_rsp_flags;
u8 rsp_code;
u8 scsi_status;
u8 reserved;
}__attribute__((packed));
struct ibmvfc_trace_entry {
struct ibmvfc_event *evt;
u32 time;
u32 scsi_id;
u32 lun;
u8 fmt;
u8 op_code;
u8 tmf_flags;
u8 type;
#define IBMVFC_TRC_START 0x00
#define IBMVFC_TRC_END 0xff
union {
struct ibmvfc_trace_start_entry start;
struct ibmvfc_trace_end_entry end;
} u;
}__attribute__((packed, aligned (8)));
enum ibmvfc_crq_formats {
IBMVFC_CMD_FORMAT = 0x01,
IBMVFC_ASYNC_EVENT = 0x02,
IBMVFC_MAD_FORMAT = 0x04,
};
enum ibmvfc_async_event {
IBMVFC_AE_ELS_PLOGI = 0x0001,
IBMVFC_AE_ELS_LOGO = 0x0002,
IBMVFC_AE_ELS_PRLO = 0x0004,
IBMVFC_AE_SCN_NPORT = 0x0008,
IBMVFC_AE_SCN_GROUP = 0x0010,
IBMVFC_AE_SCN_DOMAIN = 0x0020,
IBMVFC_AE_SCN_FABRIC = 0x0040,
IBMVFC_AE_LINK_UP = 0x0080,
IBMVFC_AE_LINK_DOWN = 0x0100,
IBMVFC_AE_LINK_DEAD = 0x0200,
IBMVFC_AE_HALT = 0x0400,
IBMVFC_AE_RESUME = 0x0800,
IBMVFC_AE_ADAPTER_FAILED = 0x1000,
};
struct ibmvfc_crq {
u8 valid;
u8 format;
u8 reserved[6];
u64 ioba;
}__attribute__((packed, aligned (8)));
struct ibmvfc_crq_queue {
struct ibmvfc_crq *msgs;
int size, cur;
dma_addr_t msg_token;
};
struct ibmvfc_async_crq {
u8 valid;
u8 pad[3];
u32 pad2;
u64 event;
u64 scsi_id;
u64 wwpn;
u64 node_name;
u64 reserved;
}__attribute__((packed, aligned (8)));
struct ibmvfc_async_crq_queue {
struct ibmvfc_async_crq *msgs;
int size, cur;
dma_addr_t msg_token;
};
union ibmvfc_iu {
struct ibmvfc_mad_common mad_common;
struct ibmvfc_npiv_login_mad npiv_login;
struct ibmvfc_discover_targets discover_targets;
struct ibmvfc_port_login plogi;
struct ibmvfc_process_login prli;
struct ibmvfc_query_tgt query_tgt;
struct ibmvfc_implicit_logout implicit_logout;
struct ibmvfc_tmf tmf;
struct ibmvfc_cmd cmd;
struct ibmvfc_passthru_mad passthru;
}__attribute__((packed, aligned (8)));
enum ibmvfc_target_action {
IBMVFC_TGT_ACTION_NONE = 0,
IBMVFC_TGT_ACTION_INIT,
IBMVFC_TGT_ACTION_INIT_WAIT,
IBMVFC_TGT_ACTION_ADD_RPORT,
IBMVFC_TGT_ACTION_DEL_RPORT,
};
struct ibmvfc_target {
struct list_head queue;
struct ibmvfc_host *vhost;
u64 scsi_id;
u64 new_scsi_id;
struct fc_rport *rport;
int target_id;
enum ibmvfc_target_action action;
int need_login;
int init_retries;
struct ibmvfc_service_parms service_parms;
struct ibmvfc_service_parms service_parms_change;
struct fc_rport_identifiers ids;
void (*job_step) (struct ibmvfc_target *);
struct kref kref;
};
/* a unit of work for the hosting partition */
struct ibmvfc_event {
struct list_head queue;
struct ibmvfc_host *vhost;
struct ibmvfc_target *tgt;
struct scsi_cmnd *cmnd;
atomic_t free;
union ibmvfc_iu *xfer_iu;
void (*done) (struct ibmvfc_event *);
struct ibmvfc_crq crq;
union ibmvfc_iu iu;
union ibmvfc_iu *sync_iu;
struct srp_direct_buf *ext_list;
dma_addr_t ext_list_token;
struct completion comp;
struct completion *eh_comp;
struct timer_list timer;
};
/* a pool of event structs for use */
struct ibmvfc_event_pool {
struct ibmvfc_event *events;
u32 size;
union ibmvfc_iu *iu_storage;
dma_addr_t iu_token;
};
enum ibmvfc_host_action {
IBMVFC_HOST_ACTION_NONE = 0,
IBMVFC_HOST_ACTION_INIT,
IBMVFC_HOST_ACTION_INIT_WAIT,
IBMVFC_HOST_ACTION_QUERY,
IBMVFC_HOST_ACTION_QUERY_TGTS,
IBMVFC_HOST_ACTION_TGT_DEL,
IBMVFC_HOST_ACTION_ALLOC_TGTS,
IBMVFC_HOST_ACTION_TGT_INIT,
IBMVFC_HOST_ACTION_TGT_DEL_FAILED,
IBMVFC_HOST_ACTION_TGT_ADD,
};
enum ibmvfc_host_state {
IBMVFC_NO_CRQ = 0,
IBMVFC_INITIALIZING,
IBMVFC_ACTIVE,
IBMVFC_HALTED,
IBMVFC_LINK_DOWN,
IBMVFC_LINK_DEAD,
IBMVFC_HOST_OFFLINE,
};
struct ibmvfc_host {
char name[8];
struct list_head queue;
struct Scsi_Host *host;
enum ibmvfc_host_state state;
enum ibmvfc_host_action action;
#define IBMVFC_NUM_TRACE_INDEX_BITS 8
#define IBMVFC_NUM_TRACE_ENTRIES (1 << IBMVFC_NUM_TRACE_INDEX_BITS)
#define IBMVFC_TRACE_SIZE (sizeof(struct ibmvfc_trace_entry) * IBMVFC_NUM_TRACE_ENTRIES)
struct ibmvfc_trace_entry *trace;
u32 trace_index:IBMVFC_NUM_TRACE_INDEX_BITS;
int num_targets;
struct list_head targets;
struct list_head sent;
struct list_head free;
struct device *dev;
struct ibmvfc_event_pool pool;
struct dma_pool *sg_pool;
mempool_t *tgt_pool;
struct ibmvfc_crq_queue crq;
struct ibmvfc_async_crq_queue async_crq;
struct ibmvfc_npiv_login login_info;
union ibmvfc_npiv_login_data *login_buf;
dma_addr_t login_buf_dma;
int disc_buf_sz;
int log_level;
struct ibmvfc_discover_targets_buf *disc_buf;
int task_set;
int init_retries;
int discovery_threads;
int client_migrated;
int reinit;
int events_to_log;
#define IBMVFC_AE_LINKUP 0x0001
#define IBMVFC_AE_LINKDOWN 0x0002
#define IBMVFC_AE_RSCN 0x0004
dma_addr_t disc_buf_dma;
unsigned int partition_number;
char partition_name[97];
void (*job_step) (struct ibmvfc_host *);
struct task_struct *work_thread;
wait_queue_head_t init_wait_q;
wait_queue_head_t work_wait_q;
};
#define DBG_CMD(CMD) do { if (ibmvfc_debug) CMD; } while (0)
#define tgt_dbg(t, fmt, ...) \
DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
#define tgt_info(t, fmt, ...) \
dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
#define tgt_err(t, fmt, ...) \
dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
#define ibmvfc_dbg(vhost, ...) \
DBG_CMD(dev_info((vhost)->dev, ##__VA_ARGS__))
#define ibmvfc_log(vhost, level, ...) \
do { \
if ((vhost)->log_level >= level) \
dev_err((vhost)->dev, ##__VA_ARGS__); \
} while (0)
#define ENTER DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Entering %s\n", __func__))
#define LEAVE DBG_CMD(printk(KERN_INFO IBMVFC_NAME": Leaving %s\n", __func__))
#ifdef CONFIG_SCSI_IBMVFC_TRACE
#define ibmvfc_create_trace_file(kobj, attr) sysfs_create_bin_file(kobj, attr)
#define ibmvfc_remove_trace_file(kobj, attr) sysfs_remove_bin_file(kobj, attr)
#else
#define ibmvfc_create_trace_file(kobj, attr) 0
#define ibmvfc_remove_trace_file(kobj, attr) do { } while (0)
#endif
#endif
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