/*
* 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 "1.0.4"
#define IBMVFC_DRIVER_DATE "(November 14, 2008)"
#define IBMVFC_DEFAULT_TIMEOUT 15
#define IBMVFC_INIT_TIMEOUT 120
#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_HOST_INIT_RETRIES 6
#define IBMVFC_MAX_TGT_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_PLOGI_REQUIRED = 0x0010,
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 {
volatile u8 valid;
volatile u8 format;
u8 reserved[6];
volatile 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 {
volatile u8 valid;
u8 pad[3];
u32 pad2;
volatile u64 event;
volatile u64 scsi_id;
volatile u64 wwpn;
volatile 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 delay_init;
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, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
#define tgt_info(t, fmt, ...) \
dev_info((t)->vhost->dev, "%llX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
#define tgt_err(t, fmt, ...) \
dev_err((t)->vhost->dev, "%llX: " 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
