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Creation of Cybook 2416 (actually Gen4) repository

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mlt
2009-12-18 17:10:00 +00:00
committed by godzil
commit 76f20f4d40
13791 changed files with 6812321 additions and 0 deletions
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4
include/scsi/Kbuild Normal file
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header-y += scsi.h
unifdef-y += scsi_ioctl.h
unifdef-y += sg.h

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include/scsi/iscsi_if.h Normal file
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/*
* iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
*
* Copyright (C) 2005 Dmitry Yusupov
* Copyright (C) 2005 Alex Aizman
* maintained by open-iscsi@googlegroups.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 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.
*
* See the file COPYING included with this distribution for more details.
*/
#ifndef ISCSI_IF_H
#define ISCSI_IF_H
#include <scsi/iscsi_proto.h>
#define UEVENT_BASE 10
#define KEVENT_BASE 100
#define ISCSI_ERR_BASE 1000
enum iscsi_uevent_e {
ISCSI_UEVENT_UNKNOWN = 0,
/* down events */
ISCSI_UEVENT_CREATE_SESSION = UEVENT_BASE + 1,
ISCSI_UEVENT_DESTROY_SESSION = UEVENT_BASE + 2,
ISCSI_UEVENT_CREATE_CONN = UEVENT_BASE + 3,
ISCSI_UEVENT_DESTROY_CONN = UEVENT_BASE + 4,
ISCSI_UEVENT_BIND_CONN = UEVENT_BASE + 5,
ISCSI_UEVENT_SET_PARAM = UEVENT_BASE + 6,
ISCSI_UEVENT_START_CONN = UEVENT_BASE + 7,
ISCSI_UEVENT_STOP_CONN = UEVENT_BASE + 8,
ISCSI_UEVENT_SEND_PDU = UEVENT_BASE + 9,
ISCSI_UEVENT_GET_STATS = UEVENT_BASE + 10,
ISCSI_UEVENT_GET_PARAM = UEVENT_BASE + 11,
ISCSI_UEVENT_TRANSPORT_EP_CONNECT = UEVENT_BASE + 12,
ISCSI_UEVENT_TRANSPORT_EP_POLL = UEVENT_BASE + 13,
ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT = UEVENT_BASE + 14,
ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15,
/* up events */
ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2,
ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3,
ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4,
};
enum iscsi_tgt_dscvr {
ISCSI_TGT_DSCVR_SEND_TARGETS = 1,
ISCSI_TGT_DSCVR_ISNS = 2,
ISCSI_TGT_DSCVR_SLP = 3,
};
struct iscsi_uevent {
uint32_t type; /* k/u events type */
uint32_t iferror; /* carries interface or resource errors */
uint64_t transport_handle;
union {
/* messages u -> k */
struct msg_create_session {
uint32_t initial_cmdsn;
} c_session;
struct msg_destroy_session {
uint32_t sid;
} d_session;
struct msg_create_conn {
uint32_t sid;
uint32_t cid;
} c_conn;
struct msg_bind_conn {
uint32_t sid;
uint32_t cid;
uint64_t transport_eph;
uint32_t is_leading;
} b_conn;
struct msg_destroy_conn {
uint32_t sid;
uint32_t cid;
} d_conn;
struct msg_send_pdu {
uint32_t sid;
uint32_t cid;
uint32_t hdr_size;
uint32_t data_size;
} send_pdu;
struct msg_set_param {
uint32_t sid;
uint32_t cid;
uint32_t param; /* enum iscsi_param */
uint32_t len;
} set_param;
struct msg_start_conn {
uint32_t sid;
uint32_t cid;
} start_conn;
struct msg_stop_conn {
uint32_t sid;
uint32_t cid;
uint64_t conn_handle;
uint32_t flag;
} stop_conn;
struct msg_get_stats {
uint32_t sid;
uint32_t cid;
} get_stats;
struct msg_transport_connect {
uint32_t non_blocking;
} ep_connect;
struct msg_transport_poll {
uint64_t ep_handle;
uint32_t timeout_ms;
} ep_poll;
struct msg_transport_disconnect {
uint64_t ep_handle;
} ep_disconnect;
struct msg_tgt_dscvr {
enum iscsi_tgt_dscvr type;
uint32_t host_no;
/*
* enable = 1 to establish a new connection
* with the server. enable = 0 to disconnect
* from the server. Used primarily to switch
* from one iSNS server to another.
*/
uint32_t enable;
} tgt_dscvr;
} u;
union {
/* messages k -> u */
int retcode;
struct msg_create_session_ret {
uint32_t sid;
uint32_t host_no;
} c_session_ret;
struct msg_create_conn_ret {
uint32_t sid;
uint32_t cid;
} c_conn_ret;
struct msg_recv_req {
uint32_t sid;
uint32_t cid;
uint64_t recv_handle;
} recv_req;
struct msg_conn_error {
uint32_t sid;
uint32_t cid;
uint32_t error; /* enum iscsi_err */
} connerror;
struct msg_session_destroyed {
uint32_t host_no;
uint32_t sid;
} d_session;
struct msg_transport_connect_ret {
uint64_t handle;
} ep_connect_ret;
} r;
} __attribute__ ((aligned (sizeof(uint64_t))));
/*
* Common error codes
*/
enum iscsi_err {
ISCSI_OK = 0,
ISCSI_ERR_DATASN = ISCSI_ERR_BASE + 1,
ISCSI_ERR_DATA_OFFSET = ISCSI_ERR_BASE + 2,
ISCSI_ERR_MAX_CMDSN = ISCSI_ERR_BASE + 3,
ISCSI_ERR_EXP_CMDSN = ISCSI_ERR_BASE + 4,
ISCSI_ERR_BAD_OPCODE = ISCSI_ERR_BASE + 5,
ISCSI_ERR_DATALEN = ISCSI_ERR_BASE + 6,
ISCSI_ERR_AHSLEN = ISCSI_ERR_BASE + 7,
ISCSI_ERR_PROTO = ISCSI_ERR_BASE + 8,
ISCSI_ERR_LUN = ISCSI_ERR_BASE + 9,
ISCSI_ERR_BAD_ITT = ISCSI_ERR_BASE + 10,
ISCSI_ERR_CONN_FAILED = ISCSI_ERR_BASE + 11,
ISCSI_ERR_R2TSN = ISCSI_ERR_BASE + 12,
ISCSI_ERR_SESSION_FAILED = ISCSI_ERR_BASE + 13,
ISCSI_ERR_HDR_DGST = ISCSI_ERR_BASE + 14,
ISCSI_ERR_DATA_DGST = ISCSI_ERR_BASE + 15,
ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16,
ISCSI_ERR_NO_SCSI_CMD = ISCSI_ERR_BASE + 17,
};
/*
* iSCSI Parameters (RFC3720)
*/
enum iscsi_param {
/* passed in using netlink set param */
ISCSI_PARAM_MAX_RECV_DLENGTH,
ISCSI_PARAM_MAX_XMIT_DLENGTH,
ISCSI_PARAM_HDRDGST_EN,
ISCSI_PARAM_DATADGST_EN,
ISCSI_PARAM_INITIAL_R2T_EN,
ISCSI_PARAM_MAX_R2T,
ISCSI_PARAM_IMM_DATA_EN,
ISCSI_PARAM_FIRST_BURST,
ISCSI_PARAM_MAX_BURST,
ISCSI_PARAM_PDU_INORDER_EN,
ISCSI_PARAM_DATASEQ_INORDER_EN,
ISCSI_PARAM_ERL,
ISCSI_PARAM_IFMARKER_EN,
ISCSI_PARAM_OFMARKER_EN,
ISCSI_PARAM_EXP_STATSN,
ISCSI_PARAM_TARGET_NAME,
ISCSI_PARAM_TPGT,
ISCSI_PARAM_PERSISTENT_ADDRESS,
ISCSI_PARAM_PERSISTENT_PORT,
ISCSI_PARAM_SESS_RECOVERY_TMO,
/* pased in through bind conn using transport_fd */
ISCSI_PARAM_CONN_PORT,
ISCSI_PARAM_CONN_ADDRESS,
/* must always be last */
ISCSI_PARAM_MAX,
};
#define ISCSI_MAX_RECV_DLENGTH (1 << ISCSI_PARAM_MAX_RECV_DLENGTH)
#define ISCSI_MAX_XMIT_DLENGTH (1 << ISCSI_PARAM_MAX_XMIT_DLENGTH)
#define ISCSI_HDRDGST_EN (1 << ISCSI_PARAM_HDRDGST_EN)
#define ISCSI_DATADGST_EN (1 << ISCSI_PARAM_DATADGST_EN)
#define ISCSI_INITIAL_R2T_EN (1 << ISCSI_PARAM_INITIAL_R2T_EN)
#define ISCSI_MAX_R2T (1 << ISCSI_PARAM_MAX_R2T)
#define ISCSI_IMM_DATA_EN (1 << ISCSI_PARAM_IMM_DATA_EN)
#define ISCSI_FIRST_BURST (1 << ISCSI_PARAM_FIRST_BURST)
#define ISCSI_MAX_BURST (1 << ISCSI_PARAM_MAX_BURST)
#define ISCSI_PDU_INORDER_EN (1 << ISCSI_PARAM_PDU_INORDER_EN)
#define ISCSI_DATASEQ_INORDER_EN (1 << ISCSI_PARAM_DATASEQ_INORDER_EN)
#define ISCSI_ERL (1 << ISCSI_PARAM_ERL)
#define ISCSI_IFMARKER_EN (1 << ISCSI_PARAM_IFMARKER_EN)
#define ISCSI_OFMARKER_EN (1 << ISCSI_PARAM_OFMARKER_EN)
#define ISCSI_EXP_STATSN (1 << ISCSI_PARAM_EXP_STATSN)
#define ISCSI_TARGET_NAME (1 << ISCSI_PARAM_TARGET_NAME)
#define ISCSI_TPGT (1 << ISCSI_PARAM_TPGT)
#define ISCSI_PERSISTENT_ADDRESS (1 << ISCSI_PARAM_PERSISTENT_ADDRESS)
#define ISCSI_PERSISTENT_PORT (1 << ISCSI_PARAM_PERSISTENT_PORT)
#define ISCSI_SESS_RECOVERY_TMO (1 << ISCSI_PARAM_SESS_RECOVERY_TMO)
#define ISCSI_CONN_PORT (1 << ISCSI_PARAM_CONN_PORT)
#define ISCSI_CONN_ADDRESS (1 << ISCSI_PARAM_CONN_ADDRESS)
#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
/**
* iscsi_hostdata - get LLD hostdata from scsi_host
* @_hostdata: pointer to scsi host's hostdata
**/
#define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
/*
* These flags presents iSCSI Data-Path capabilities.
*/
#define CAP_RECOVERY_L0 0x1
#define CAP_RECOVERY_L1 0x2
#define CAP_RECOVERY_L2 0x4
#define CAP_MULTI_R2T 0x8
#define CAP_HDRDGST 0x10
#define CAP_DATADGST 0x20
#define CAP_MULTI_CONN 0x40
#define CAP_TEXT_NEGO 0x80
#define CAP_MARKERS 0x100
/*
* These flags describes reason of stop_conn() call
*/
#define STOP_CONN_TERM 0x1
#define STOP_CONN_SUSPEND 0x2
#define STOP_CONN_RECOVER 0x3
#define ISCSI_STATS_CUSTOM_MAX 32
#define ISCSI_STATS_CUSTOM_DESC_MAX 64
struct iscsi_stats_custom {
char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
uint64_t value;
};
/*
* struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
*
* Note: this structure contains counters collected on per-connection basis.
*/
struct iscsi_stats {
/* octets */
uint64_t txdata_octets;
uint64_t rxdata_octets;
/* xmit pdus */
uint32_t noptx_pdus;
uint32_t scsicmd_pdus;
uint32_t tmfcmd_pdus;
uint32_t login_pdus;
uint32_t text_pdus;
uint32_t dataout_pdus;
uint32_t logout_pdus;
uint32_t snack_pdus;
/* recv pdus */
uint32_t noprx_pdus;
uint32_t scsirsp_pdus;
uint32_t tmfrsp_pdus;
uint32_t textrsp_pdus;
uint32_t datain_pdus;
uint32_t logoutrsp_pdus;
uint32_t r2t_pdus;
uint32_t async_pdus;
uint32_t rjt_pdus;
/* errors */
uint32_t digest_err;
uint32_t timeout_err;
/*
* iSCSI Custom Statistics support, i.e. Transport could
* extend existing MIB statistics with its own specific statistics
* up to ISCSI_STATS_CUSTOM_MAX
*/
uint32_t custom_length;
struct iscsi_stats_custom custom[0]
__attribute__ ((aligned (sizeof(uint64_t))));
};
#endif

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/*
* RFC 3720 (iSCSI) protocol data types
*
* Copyright (C) 2005 Dmitry Yusupov
* Copyright (C) 2005 Alex Aizman
* maintained by open-iscsi@googlegroups.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 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.
*
* See the file COPYING included with this distribution for more details.
*/
#ifndef ISCSI_PROTO_H
#define ISCSI_PROTO_H
#define ISCSI_DRAFT20_VERSION 0x00
/* default iSCSI listen port for incoming connections */
#define ISCSI_LISTEN_PORT 3260
/* Padding word length */
#define PAD_WORD_LEN 4
/*
* useful common(control and data pathes) macro
*/
#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
#define hton24(p, v) { \
p[0] = (((v) >> 16) & 0xFF); \
p[1] = (((v) >> 8) & 0xFF); \
p[2] = ((v) & 0xFF); \
}
#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}
/* initiator tags; opaque for target */
typedef uint32_t __bitwise__ itt_t;
/* below makes sense only for initiator that created this tag */
#define build_itt(itt, id, age) ((__force itt_t)\
((itt) | ((id) << ISCSI_CID_SHIFT) | ((age) << ISCSI_AGE_SHIFT)))
#define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK)
#define RESERVED_ITT ((__force itt_t)0xffffffff)
/*
* iSCSI Template Message Header
*/
struct iscsi_hdr {
uint8_t opcode;
uint8_t flags; /* Final bit */
uint8_t rsvd2[2];
uint8_t hlength; /* AHSs total length */
uint8_t dlength[3]; /* Data length */
uint8_t lun[8];
itt_t itt; /* Initiator Task Tag, opaque for target */
__be32 ttt; /* Target Task Tag */
__be32 statsn;
__be32 exp_statsn;
__be32 max_statsn;
uint8_t other[12];
};
/************************* RFC 3720 Begin *****************************/
#define ISCSI_RESERVED_TAG 0xffffffff
/* Opcode encoding bits */
#define ISCSI_OP_RETRY 0x80
#define ISCSI_OP_IMMEDIATE 0x40
#define ISCSI_OPCODE_MASK 0x3F
/* Initiator Opcode values */
#define ISCSI_OP_NOOP_OUT 0x00
#define ISCSI_OP_SCSI_CMD 0x01
#define ISCSI_OP_SCSI_TMFUNC 0x02
#define ISCSI_OP_LOGIN 0x03
#define ISCSI_OP_TEXT 0x04
#define ISCSI_OP_SCSI_DATA_OUT 0x05
#define ISCSI_OP_LOGOUT 0x06
#define ISCSI_OP_SNACK 0x10
#define ISCSI_OP_VENDOR1_CMD 0x1c
#define ISCSI_OP_VENDOR2_CMD 0x1d
#define ISCSI_OP_VENDOR3_CMD 0x1e
#define ISCSI_OP_VENDOR4_CMD 0x1f
/* Target Opcode values */
#define ISCSI_OP_NOOP_IN 0x20
#define ISCSI_OP_SCSI_CMD_RSP 0x21
#define ISCSI_OP_SCSI_TMFUNC_RSP 0x22
#define ISCSI_OP_LOGIN_RSP 0x23
#define ISCSI_OP_TEXT_RSP 0x24
#define ISCSI_OP_SCSI_DATA_IN 0x25
#define ISCSI_OP_LOGOUT_RSP 0x26
#define ISCSI_OP_R2T 0x31
#define ISCSI_OP_ASYNC_EVENT 0x32
#define ISCSI_OP_REJECT 0x3f
struct iscsi_ahs_hdr {
__be16 ahslength;
uint8_t ahstype;
uint8_t ahspec[5];
};
#define ISCSI_AHSTYPE_CDB 1
#define ISCSI_AHSTYPE_RLENGTH 2
/* iSCSI PDU Header */
struct iscsi_cmd {
uint8_t opcode;
uint8_t flags;
__be16 rsvd2;
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt; /* Initiator Task Tag */
__be32 data_length;
__be32 cmdsn;
__be32 exp_statsn;
uint8_t cdb[16]; /* SCSI Command Block */
/* Additional Data (Command Dependent) */
};
/* Command PDU flags */
#define ISCSI_FLAG_CMD_FINAL 0x80
#define ISCSI_FLAG_CMD_READ 0x40
#define ISCSI_FLAG_CMD_WRITE 0x20
#define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */
/* SCSI Command Attribute values */
#define ISCSI_ATTR_UNTAGGED 0
#define ISCSI_ATTR_SIMPLE 1
#define ISCSI_ATTR_ORDERED 2
#define ISCSI_ATTR_HEAD_OF_QUEUE 3
#define ISCSI_ATTR_ACA 4
struct iscsi_rlength_ahdr {
__be16 ahslength;
uint8_t ahstype;
uint8_t reserved;
__be32 read_length;
};
/* SCSI Response Header */
struct iscsi_cmd_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t response;
uint8_t cmd_status;
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd[8];
itt_t itt; /* Initiator Task Tag */
__be32 rsvd1;
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
__be32 exp_datasn;
__be32 bi_residual_count;
__be32 residual_count;
/* Response or Sense Data (optional) */
};
/* Command Response PDU flags */
#define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10
#define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08
#define ISCSI_FLAG_CMD_OVERFLOW 0x04
#define ISCSI_FLAG_CMD_UNDERFLOW 0x02
/* iSCSI Status values. Valid if Rsp Selector bit is not set */
#define ISCSI_STATUS_CMD_COMPLETED 0
#define ISCSI_STATUS_TARGET_FAILURE 1
#define ISCSI_STATUS_SUBSYS_FAILURE 2
/* Asynchronous Event Header */
struct iscsi_async {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[2];
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
uint8_t rsvd4[8];
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
uint8_t async_event;
uint8_t async_vcode;
__be16 param1;
__be16 param2;
__be16 param3;
uint8_t rsvd5[4];
};
/* iSCSI Event Codes */
#define ISCSI_ASYNC_MSG_SCSI_EVENT 0
#define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1
#define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2
#define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3
#define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4
#define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255
/* NOP-Out Message */
struct iscsi_nopout {
uint8_t opcode;
uint8_t flags;
__be16 rsvd2;
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 cmdsn;
__be32 exp_statsn;
uint8_t rsvd4[16];
};
/* NOP-In Message */
struct iscsi_nopin {
uint8_t opcode;
uint8_t flags;
__be16 rsvd2;
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
uint8_t rsvd4[12];
};
/* SCSI Task Management Message Header */
struct iscsi_tm {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd1[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt; /* Initiator Task Tag */
itt_t rtt; /* Reference Task Tag */
__be32 cmdsn;
__be32 exp_statsn;
__be32 refcmdsn;
__be32 exp_datasn;
uint8_t rsvd2[8];
};
#define ISCSI_FLAG_TM_FUNC_MASK 0x7F
/* Function values */
#define ISCSI_TM_FUNC_ABORT_TASK 1
#define ISCSI_TM_FUNC_ABORT_TASK_SET 2
#define ISCSI_TM_FUNC_CLEAR_ACA 3
#define ISCSI_TM_FUNC_CLEAR_TASK_SET 4
#define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5
#define ISCSI_TM_FUNC_TARGET_WARM_RESET 6
#define ISCSI_TM_FUNC_TARGET_COLD_RESET 7
#define ISCSI_TM_FUNC_TASK_REASSIGN 8
/* SCSI Task Management Response Header */
struct iscsi_tm_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t response; /* see Response values below */
uint8_t qualifier;
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd2[8];
itt_t itt; /* Initiator Task Tag */
itt_t rtt; /* Reference Task Tag */
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
uint8_t rsvd3[12];
};
/* Response values */
#define ISCSI_TMF_RSP_COMPLETE 0x00
#define ISCSI_TMF_RSP_NO_TASK 0x01
#define ISCSI_TMF_RSP_NO_LUN 0x02
#define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03
#define ISCSI_TMF_RSP_NO_FAILOVER 0x04
#define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05
#define ISCSI_TMF_RSP_AUTH_FAILED 0x06
#define ISCSI_TMF_RSP_REJECTED 0xff
/* Ready To Transfer Header */
struct iscsi_r2t_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
__be32 r2tsn;
__be32 data_offset;
__be32 data_length;
};
/* SCSI Data Hdr */
struct iscsi_data {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[2];
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt;
__be32 ttt;
__be32 rsvd4;
__be32 exp_statsn;
__be32 rsvd5;
__be32 datasn;
__be32 offset;
__be32 rsvd6;
/* Payload */
};
/* SCSI Data Response Hdr */
struct iscsi_data_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2;
uint8_t cmd_status;
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
itt_t itt;
__be32 ttt;
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
__be32 datasn;
__be32 offset;
__be32 residual_count;
};
/* Data Response PDU flags */
#define ISCSI_FLAG_DATA_ACK 0x40
#define ISCSI_FLAG_DATA_OVERFLOW 0x04
#define ISCSI_FLAG_DATA_UNDERFLOW 0x02
#define ISCSI_FLAG_DATA_STATUS 0x01
/* Text Header */
struct iscsi_text {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd4[8];
itt_t itt;
__be32 ttt;
__be32 cmdsn;
__be32 exp_statsn;
uint8_t rsvd5[16];
/* Text - key=value pairs */
};
#define ISCSI_FLAG_TEXT_CONTINUE 0x40
/* Text Response Header */
struct iscsi_text_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd4[8];
itt_t itt;
__be32 ttt;
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
uint8_t rsvd5[12];
/* Text Response - key:value pairs */
};
/* Login Header */
struct iscsi_login {
uint8_t opcode;
uint8_t flags;
uint8_t max_version; /* Max. version supported */
uint8_t min_version; /* Min. version supported */
uint8_t hlength;
uint8_t dlength[3];
uint8_t isid[6]; /* Initiator Session ID */
__be16 tsih; /* Target Session Handle */
itt_t itt; /* Initiator Task Tag */
__be16 cid;
__be16 rsvd3;
__be32 cmdsn;
__be32 exp_statsn;
uint8_t rsvd5[16];
};
/* Login PDU flags */
#define ISCSI_FLAG_LOGIN_TRANSIT 0x80
#define ISCSI_FLAG_LOGIN_CONTINUE 0x40
#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */
#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */
#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
#define ISCSI_LOGIN_NEXT_STAGE(flags) \
(flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK)
/* Login Response Header */
struct iscsi_login_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t max_version; /* Max. version supported */
uint8_t active_version; /* Active version */
uint8_t hlength;
uint8_t dlength[3];
uint8_t isid[6]; /* Initiator Session ID */
__be16 tsih; /* Target Session Handle */
itt_t itt; /* Initiator Task Tag */
__be32 rsvd3;
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
uint8_t status_class; /* see Login RSP ststus classes below */
uint8_t status_detail; /* see Login RSP Status details below */
uint8_t rsvd4[10];
};
/* Login stage (phase) codes for CSG, NSG */
#define ISCSI_INITIAL_LOGIN_STAGE -1
#define ISCSI_SECURITY_NEGOTIATION_STAGE 0
#define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1
#define ISCSI_FULL_FEATURE_PHASE 3
/* Login Status response classes */
#define ISCSI_STATUS_CLS_SUCCESS 0x00
#define ISCSI_STATUS_CLS_REDIRECT 0x01
#define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02
#define ISCSI_STATUS_CLS_TARGET_ERR 0x03
/* Login Status response detail codes */
/* Class-0 (Success) */
#define ISCSI_LOGIN_STATUS_ACCEPT 0x00
/* Class-1 (Redirection) */
#define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01
#define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02
/* Class-2 (Initiator Error) */
#define ISCSI_LOGIN_STATUS_INIT_ERR 0x00
#define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01
#define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02
#define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03
#define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04
#define ISCSI_LOGIN_STATUS_NO_VERSION 0x05
#define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06
#define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07
#define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08
#define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09
#define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a
#define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b
/* Class-3 (Target Error) */
#define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00
#define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01
#define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02
/* Logout Header */
struct iscsi_logout {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd1[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd2[8];
itt_t itt; /* Initiator Task Tag */
__be16 cid;
uint8_t rsvd3[2];
__be32 cmdsn;
__be32 exp_statsn;
uint8_t rsvd4[16];
};
/* Logout PDU flags */
#define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F
/* logout reason_code values */
#define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0
#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1
#define ISCSI_LOGOUT_REASON_RECOVERY 2
#define ISCSI_LOGOUT_REASON_AEN_REQUEST 3
/* Logout Response Header */
struct iscsi_logout_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t response; /* see Logout response values below */
uint8_t rsvd2;
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd3[8];
itt_t itt; /* Initiator Task Tag */
__be32 rsvd4;
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
__be32 rsvd5;
__be16 t2wait;
__be16 t2retain;
__be32 rsvd6;
};
/* logout response status values */
#define ISCSI_LOGOUT_SUCCESS 0
#define ISCSI_LOGOUT_CID_NOT_FOUND 1
#define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2
#define ISCSI_LOGOUT_CLEANUP_FAILED 3
/* SNACK Header */
struct iscsi_snack {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[14];
itt_t itt;
__be32 begrun;
__be32 runlength;
__be32 exp_statsn;
__be32 rsvd3;
__be32 exp_datasn;
uint8_t rsvd6[8];
};
/* SNACK PDU flags */
#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */
/* Reject Message Header */
struct iscsi_reject {
uint8_t opcode;
uint8_t flags;
uint8_t reason;
uint8_t rsvd2;
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd3[8];
__be32 ffffffff;
uint8_t rsvd4[4];
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
__be32 datasn;
uint8_t rsvd5[8];
/* Text - Rejected hdr */
};
/* Reason for Reject */
#define ISCSI_REASON_CMD_BEFORE_LOGIN 1
#define ISCSI_REASON_DATA_DIGEST_ERROR 2
#define ISCSI_REASON_DATA_SNACK_REJECT 3
#define ISCSI_REASON_PROTOCOL_ERROR 4
#define ISCSI_REASON_CMD_NOT_SUPPORTED 5
#define ISCSI_REASON_IMM_CMD_REJECT 6
#define ISCSI_REASON_TASK_IN_PROGRESS 7
#define ISCSI_REASON_INVALID_SNACK 8
#define ISCSI_REASON_BOOKMARK_INVALID 9
#define ISCSI_REASON_BOOKMARK_NO_RESOURCES 10
#define ISCSI_REASON_NEGOTIATION_RESET 11
/* Max. number of Key=Value pairs in a text message */
#define MAX_KEY_VALUE_PAIRS 8192
/* maximum length for text keys/values */
#define KEY_MAXLEN 64
#define VALUE_MAXLEN 255
#define TARGET_NAME_MAXLEN VALUE_MAXLEN
#define DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH 8192
/************************* RFC 3720 End *****************************/
#endif /* ISCSI_PROTO_H */

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/*
* iSCSI lib definitions
*
* Copyright (C) 2006 Red Hat, Inc. All rights reserved.
* Copyright (C) 2004 - 2006 Mike Christie
* Copyright (C) 2004 - 2005 Dmitry Yusupov
* Copyright (C) 2004 - 2005 Alex Aizman
*
* 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 LIBISCSI_H
#define LIBISCSI_H
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <scsi/iscsi_proto.h>
#include <scsi/iscsi_if.h>
struct scsi_transport_template;
struct scsi_device;
struct Scsi_Host;
struct scsi_cmnd;
struct socket;
struct iscsi_transport;
struct iscsi_cls_session;
struct iscsi_cls_conn;
struct iscsi_session;
struct iscsi_nopin;
/* #define DEBUG_SCSI */
#ifdef DEBUG_SCSI
#define debug_scsi(fmt...) printk(KERN_INFO "iscsi: " fmt)
#else
#define debug_scsi(fmt...)
#endif
#define ISCSI_XMIT_CMDS_MAX 128 /* must be power of 2 */
#define ISCSI_MGMT_CMDS_MAX 32 /* must be power of 2 */
#define ISCSI_CONN_MAX 1
#define ISCSI_MGMT_ITT_OFFSET 0xa00
#define ISCSI_DEF_CMD_PER_LUN 32
#define ISCSI_MAX_CMD_PER_LUN 128
/* Task Mgmt states */
#define TMABORT_INITIAL 0x0
#define TMABORT_SUCCESS 0x1
#define TMABORT_FAILED 0x2
#define TMABORT_TIMEDOUT 0x3
#define TMABORT_NOT_FOUND 0x4
/* Connection suspend "bit" */
#define ISCSI_SUSPEND_BIT 1
#define ISCSI_ITT_MASK (0xfff)
#define ISCSI_CID_SHIFT 12
#define ISCSI_CID_MASK (0xffff << ISCSI_CID_SHIFT)
#define ISCSI_AGE_SHIFT 28
#define ISCSI_AGE_MASK (0xf << ISCSI_AGE_SHIFT)
struct iscsi_mgmt_task {
/*
* Becuae LLDs allocate their hdr differently, this is a pointer to
* that storage. It must be setup at session creation time.
*/
struct iscsi_hdr *hdr;
char *data; /* mgmt payload */
int data_count; /* counts data to be sent */
uint32_t itt; /* this ITT */
void *dd_data; /* driver/transport data */
struct list_head running;
};
enum {
ISCSI_TASK_COMPLETED,
ISCSI_TASK_PENDING,
ISCSI_TASK_RUNNING,
};
struct iscsi_cmd_task {
/*
* Becuae LLDs allocate their hdr differently, this is a pointer to
* that storage. It must be setup at session creation time.
*/
struct iscsi_cmd *hdr;
int itt; /* this ITT */
int datasn; /* DataSN */
uint32_t unsol_datasn;
int imm_count; /* imm-data (bytes) */
int unsol_count; /* unsolicited (bytes)*/
/* offset in unsolicited stream (bytes); */
int unsol_offset;
int data_count; /* remaining Data-Out */
struct scsi_cmnd *sc; /* associated SCSI cmd*/
int total_length;
struct iscsi_conn *conn; /* used connection */
struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */
/* state set/tested under session->lock */
int state;
atomic_t refcount;
struct list_head running; /* running cmd list */
void *dd_data; /* driver/transport data */
};
struct iscsi_conn {
struct iscsi_cls_conn *cls_conn; /* ptr to class connection */
void *dd_data; /* iscsi_transport data */
struct iscsi_session *session; /* parent session */
/*
* LLDs should set this lock. It protects the transport recv
* code
*/
rwlock_t *recv_lock;
/*
* conn_stop() flag: stop to recover, stop to terminate
*/
int stop_stage;
/* iSCSI connection-wide sequencing */
uint32_t exp_statsn;
/* control data */
int id; /* CID */
int c_stage; /* connection state */
/*
* Preallocated buffer for pdus that have data but do not
* originate from scsi-ml. We never have two pdus using the
* buffer at the same time. It is only allocated to
* the default max recv size because the pdus we support
* should always fit in this buffer
*/
char *data;
struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */
struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */
struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
/* xmit */
struct kfifo *immqueue; /* immediate xmit queue */
struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
struct list_head mgmt_run_list; /* list of control tasks */
struct list_head xmitqueue; /* data-path cmd queue */
struct list_head run_list; /* list of cmds in progress */
struct work_struct xmitwork; /* per-conn. xmit workqueue */
/*
* serializes connection xmit, access to kfifos:
* xmitqueue, immqueue, mgmtqueue
*/
struct mutex xmitmutex;
unsigned long suspend_tx; /* suspend Tx */
unsigned long suspend_rx; /* suspend Rx */
/* abort */
wait_queue_head_t ehwait; /* used in eh_abort() */
struct iscsi_tm tmhdr;
struct timer_list tmabort_timer;
int tmabort_state; /* see TMABORT_INITIAL, etc.*/
/* negotiated params */
int max_recv_dlength; /* initiator_max_recv_dsl*/
int max_xmit_dlength; /* target_max_recv_dsl */
int hdrdgst_en;
int datadgst_en;
int ifmarker_en;
int ofmarker_en;
/* values userspace uses to id a conn */
int persistent_port;
char *persistent_address;
/* MIB-statistics */
uint64_t txdata_octets;
uint64_t rxdata_octets;
uint32_t scsicmd_pdus_cnt;
uint32_t dataout_pdus_cnt;
uint32_t scsirsp_pdus_cnt;
uint32_t datain_pdus_cnt;
uint32_t r2t_pdus_cnt;
uint32_t tmfcmd_pdus_cnt;
int32_t tmfrsp_pdus_cnt;
/* custom statistics */
uint32_t eh_abort_cnt;
};
struct iscsi_queue {
struct kfifo *queue; /* FIFO Queue */
void **pool; /* Pool of elements */
int max; /* Max number of elements */
};
struct iscsi_session {
/* iSCSI session-wide sequencing */
uint32_t cmdsn;
uint32_t exp_cmdsn;
uint32_t max_cmdsn;
/* configuration */
int initial_r2t_en;
int max_r2t;
int imm_data_en;
int first_burst;
int max_burst;
int time2wait;
int time2retain;
int pdu_inorder_en;
int dataseq_inorder_en;
int erl;
int tpgt;
char *targetname;
/* control data */
struct iscsi_transport *tt;
struct Scsi_Host *host;
struct iscsi_conn *leadconn; /* leading connection */
spinlock_t lock; /* protects session state, *
* sequence numbers, *
* session resources: *
* - cmdpool, *
* - mgmtpool, *
* - r2tpool */
int state; /* session state */
int age; /* counts session re-opens */
int cmds_max; /* size of cmds array */
struct iscsi_cmd_task **cmds; /* Original Cmds arr */
struct iscsi_queue cmdpool; /* PDU's pool */
int mgmtpool_max; /* size of mgmt array */
struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */
struct iscsi_queue mgmtpool; /* Mgmt PDU's pool */
};
/*
* scsi host template
*/
extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth);
extern int iscsi_eh_abort(struct scsi_cmnd *sc);
extern int iscsi_eh_host_reset(struct scsi_cmnd *sc);
extern int iscsi_queuecommand(struct scsi_cmnd *sc,
void (*done)(struct scsi_cmnd *));
/*
* session management
*/
extern struct iscsi_cls_session *
iscsi_session_setup(struct iscsi_transport *, struct scsi_transport_template *,
int, int, uint32_t, uint32_t *);
extern void iscsi_session_teardown(struct iscsi_cls_session *);
extern struct iscsi_session *class_to_transport_session(struct iscsi_cls_session *);
extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf, int buflen);
extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
enum iscsi_param param, char *buf);
#define session_to_cls(_sess) \
hostdata_session(_sess->host->hostdata)
/*
* connection management
*/
extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *,
uint32_t);
extern void iscsi_conn_teardown(struct iscsi_cls_conn *);
extern int iscsi_conn_start(struct iscsi_cls_conn *);
extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
int);
extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf);
/*
* pdu and task processing
*/
extern int iscsi_check_assign_cmdsn(struct iscsi_session *,
struct iscsi_nopin *);
extern void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *,
struct iscsi_data *hdr);
extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *,
char *, uint32_t);
extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
char *, int);
extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
char *, int);
extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *,
uint32_t *);
/*
* generic helpers
*/
extern void iscsi_pool_free(struct iscsi_queue *, void **);
extern int iscsi_pool_init(struct iscsi_queue *, int, void ***, int);
#endif

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/*
* SAS host prototypes and structures header file
*
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
*
* This file is licensed under GPLv2.
*
* 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 _LIBSAS_H_
#define _LIBSAS_H_
#include <linux/timer.h>
#include <linux/pci.h>
#include <scsi/sas.h>
#include <linux/list.h>
#include <asm/semaphore.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport_sas.h>
#include <asm/scatterlist.h>
struct block_device;
enum sas_class {
SAS,
EXPANDER
};
enum sas_phy_role {
PHY_ROLE_NONE = 0,
PHY_ROLE_TARGET = 0x40,
PHY_ROLE_INITIATOR = 0x80,
};
enum sas_phy_type {
PHY_TYPE_PHYSICAL,
PHY_TYPE_VIRTUAL
};
/* The events are mnemonically described in sas_dump.c
* so when updating/adding events here, please also
* update the other file too.
*/
enum ha_event {
HAE_RESET = 0U,
HA_NUM_EVENTS = 1,
};
enum port_event {
PORTE_BYTES_DMAED = 0U,
PORTE_BROADCAST_RCVD = 1,
PORTE_LINK_RESET_ERR = 2,
PORTE_TIMER_EVENT = 3,
PORTE_HARD_RESET = 4,
PORT_NUM_EVENTS = 5,
};
enum phy_event {
PHYE_LOSS_OF_SIGNAL = 0U,
PHYE_OOB_DONE = 1,
PHYE_OOB_ERROR = 2,
PHYE_SPINUP_HOLD = 3, /* hot plug SATA, no COMWAKE sent */
PHY_NUM_EVENTS = 4,
};
enum discover_event {
DISCE_DISCOVER_DOMAIN = 0U,
DISCE_REVALIDATE_DOMAIN = 1,
DISCE_PORT_GONE = 2,
DISC_NUM_EVENTS = 3,
};
/* ---------- Expander Devices ---------- */
#define ETASK 0xFA
#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
#define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
attr)
enum routing_attribute {
DIRECT_ROUTING,
SUBTRACTIVE_ROUTING,
TABLE_ROUTING,
};
enum ex_phy_state {
PHY_EMPTY,
PHY_VACANT,
PHY_NOT_PRESENT,
PHY_DEVICE_DISCOVERED
};
struct ex_phy {
int phy_id;
enum ex_phy_state phy_state;
enum sas_dev_type attached_dev_type;
enum sas_linkrate linkrate;
u8 attached_sata_host:1;
u8 attached_sata_dev:1;
u8 attached_sata_ps:1;
enum sas_proto attached_tproto;
enum sas_proto attached_iproto;
u8 attached_sas_addr[SAS_ADDR_SIZE];
u8 attached_phy_id;
u8 phy_change_count;
enum routing_attribute routing_attr;
u8 virtual:1;
int last_da_index;
struct sas_phy *phy;
struct sas_port *port;
};
struct expander_device {
struct list_head children;
u16 ex_change_count;
u16 max_route_indexes;
u8 num_phys;
u8 configuring:1;
u8 conf_route_table:1;
u8 enclosure_logical_id[8];
struct ex_phy *ex_phy;
struct sas_port *parent_port;
};
/* ---------- SATA device ---------- */
enum ata_command_set {
ATA_COMMAND_SET = 0,
ATAPI_COMMAND_SET = 1,
};
struct sata_device {
enum ata_command_set command_set;
struct smp_resp rps_resp; /* report_phy_sata_resp */
__le16 *identify_device;
__le16 *identify_packet_device;
u8 port_no; /* port number, if this is a PM (Port) */
struct list_head children; /* PM Ports if this is a PM */
};
/* ---------- Domain device ---------- */
struct domain_device {
enum sas_dev_type dev_type;
enum sas_linkrate linkrate;
enum sas_linkrate min_linkrate;
enum sas_linkrate max_linkrate;
int pathways;
struct domain_device *parent;
struct list_head siblings; /* devices on the same level */
struct asd_sas_port *port; /* shortcut to root of the tree */
struct list_head dev_list_node;
enum sas_proto iproto;
enum sas_proto tproto;
struct sas_rphy *rphy;
u8 sas_addr[SAS_ADDR_SIZE];
u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
u8 frame_rcvd[32];
union {
struct expander_device ex_dev;
struct sata_device sata_dev; /* STP & directly attached */
};
void *lldd_dev;
};
struct sas_discovery_event {
struct work_struct work;
struct asd_sas_port *port;
};
struct sas_discovery {
spinlock_t disc_event_lock;
struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
unsigned long pending;
u8 fanout_sas_addr[8];
u8 eeds_a[8];
u8 eeds_b[8];
int max_level;
};
/* The port struct is Class:RW, driver:RO */
struct asd_sas_port {
/* private: */
struct completion port_gone_completion;
struct sas_discovery disc;
struct domain_device *port_dev;
spinlock_t dev_list_lock;
struct list_head dev_list;
enum sas_linkrate linkrate;
struct sas_phy *phy;
struct work_struct work;
/* public: */
int id;
enum sas_class class;
u8 sas_addr[SAS_ADDR_SIZE];
u8 attached_sas_addr[SAS_ADDR_SIZE];
enum sas_proto iproto;
enum sas_proto tproto;
enum sas_oob_mode oob_mode;
spinlock_t phy_list_lock;
struct list_head phy_list;
int num_phys;
u32 phy_mask;
struct sas_ha_struct *ha;
struct sas_port *port;
void *lldd_port; /* not touched by the sas class code */
};
struct asd_sas_event {
struct work_struct work;
struct asd_sas_phy *phy;
};
/* The phy pretty much is controlled by the LLDD.
* The class only reads those fields.
*/
struct asd_sas_phy {
/* private: */
/* protected by ha->event_lock */
struct asd_sas_event port_events[PORT_NUM_EVENTS];
struct asd_sas_event phy_events[PHY_NUM_EVENTS];
unsigned long port_events_pending;
unsigned long phy_events_pending;
int error;
struct sas_phy *phy;
/* public: */
/* The following are class:RO, driver:R/W */
int enabled; /* must be set */
int id; /* must be set */
enum sas_class class;
enum sas_proto iproto;
enum sas_proto tproto;
enum sas_phy_type type;
enum sas_phy_role role;
enum sas_oob_mode oob_mode;
enum sas_linkrate linkrate;
u8 *sas_addr; /* must be set */
u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
spinlock_t frame_rcvd_lock;
u8 *frame_rcvd; /* must be set */
int frame_rcvd_size;
spinlock_t sas_prim_lock;
u32 sas_prim;
struct list_head port_phy_el; /* driver:RO */
struct asd_sas_port *port; /* Class:RW, driver: RO */
struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
void *lldd_phy; /* not touched by the sas_class_code */
};
struct scsi_core {
struct Scsi_Host *shost;
spinlock_t task_queue_lock;
struct list_head task_queue;
int task_queue_size;
struct semaphore queue_thread_sema;
int queue_thread_kill;
};
struct sas_ha_event {
struct work_struct work;
struct sas_ha_struct *ha;
};
enum sas_ha_state {
SAS_HA_REGISTERED,
SAS_HA_UNREGISTERED
};
struct sas_ha_struct {
/* private: */
spinlock_t event_lock;
struct sas_ha_event ha_events[HA_NUM_EVENTS];
unsigned long pending;
enum sas_ha_state state;
spinlock_t state_lock;
struct scsi_core core;
/* public: */
char *sas_ha_name;
struct pci_dev *pcidev; /* should be set */
struct module *lldd_module; /* should be set */
u8 *sas_addr; /* must be set */
u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
spinlock_t phy_port_lock;
struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
int num_phys; /* must be set, gt 0, static */
/* The class calls this to send a task for execution. */
int lldd_max_execute_num;
int lldd_queue_size;
/* LLDD calls these to notify the class of an event. */
void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
void *lldd_ha; /* not touched by sas class code */
struct list_head eh_done_q;
};
#define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
static inline struct domain_device *
starget_to_domain_dev(struct scsi_target *starget) {
return starget->hostdata;
}
static inline struct domain_device *
sdev_to_domain_dev(struct scsi_device *sdev) {
return starget_to_domain_dev(sdev->sdev_target);
}
static inline struct domain_device *
cmd_to_domain_dev(struct scsi_cmnd *cmd)
{
return sdev_to_domain_dev(cmd->device);
}
void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
/* Before calling a notify event, LLDD should use this function
* when the link is severed (possibly from its tasklet).
* The idea is that the Class only reads those, while the LLDD,
* can R/W these (thus avoiding a race).
*/
static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
{
phy->oob_mode = OOB_NOT_CONNECTED;
phy->linkrate = SAS_LINK_RATE_UNKNOWN;
}
/* ---------- Tasks ---------- */
/*
service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
exec_status | | |
---------------------+---------------------+-----------------------+
SAM_... | X | |
DEV_NO_RESPONSE | X | X |
INTERRUPTED | X | |
QUEUE_FULL | | X |
DEVICE_UNKNOWN | | X |
SG_ERR | | X |
---------------------+---------------------+-----------------------+
*/
enum service_response {
SAS_TASK_COMPLETE,
SAS_TASK_UNDELIVERED = -1,
};
enum exec_status {
SAM_GOOD = 0,
SAM_CHECK_COND = 2,
SAM_COND_MET = 4,
SAM_BUSY = 8,
SAM_INTERMEDIATE = 0x10,
SAM_IM_COND_MET = 0x12,
SAM_RESV_CONFLICT= 0x14,
SAM_TASK_SET_FULL= 0x28,
SAM_ACA_ACTIVE = 0x30,
SAM_TASK_ABORTED = 0x40,
SAS_DEV_NO_RESPONSE = 0x80,
SAS_DATA_UNDERRUN,
SAS_DATA_OVERRUN,
SAS_INTERRUPTED,
SAS_QUEUE_FULL,
SAS_DEVICE_UNKNOWN,
SAS_SG_ERR,
SAS_OPEN_REJECT,
SAS_OPEN_TO,
SAS_PROTO_RESPONSE,
SAS_PHY_DOWN,
SAS_NAK_R_ERR,
SAS_PENDING,
SAS_ABORTED_TASK,
};
/* When a task finishes with a response, the LLDD examines the
* response:
* - For an ATA task task_status_struct::stat is set to
* SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
* contents of struct ata_task_resp.
* - For SSP tasks, if no data is present or status/TMF response
* is valid, task_status_struct::stat is set. If data is present
* (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
* task_status_struct::buf_valid_size, and task_status_struct::stat is
* set to SAM_CHECK_COND.
*
* "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
* for ATA task.
*
* "frame_len" is the total frame length, which could be more or less
* than actually copied.
*
* Tasks ending with response, always set the residual field.
*/
struct ata_task_resp {
u16 frame_len;
u8 ending_fis[24]; /* dev to host or data-in */
u32 sstatus;
u32 serror;
u32 scontrol;
u32 sactive;
};
#define SAS_STATUS_BUF_SIZE 96
struct task_status_struct {
enum service_response resp;
enum exec_status stat;
int buf_valid_size;
u8 buf[SAS_STATUS_BUF_SIZE];
u32 residual;
enum sas_open_rej_reason open_rej_reason;
};
/* ATA and ATAPI task queuable to a SAS LLDD.
*/
struct sas_ata_task {
struct host_to_dev_fis fis;
u8 atapi_packet[16]; /* 0 if not ATAPI task */
u8 retry_count; /* hardware retry, should be > 0 */
u8 dma_xfer:1; /* PIO:0 or DMA:1 */
u8 use_ncq:1;
u8 set_affil_pol:1;
u8 stp_affil_pol:1;
u8 device_control_reg_update:1;
};
struct sas_smp_task {
struct scatterlist smp_req;
struct scatterlist smp_resp;
};
enum task_attribute {
TASK_ATTR_SIMPLE = 0,
TASK_ATTR_HOQ = 1,
TASK_ATTR_ORDERED= 2,
TASK_ATTR_ACA = 4,
};
struct sas_ssp_task {
u8 retry_count; /* hardware retry, should be > 0 */
u8 LUN[8];
u8 enable_first_burst:1;
enum task_attribute task_attr;
u8 task_prio;
u8 cdb[16];
};
struct sas_task {
struct domain_device *dev;
struct list_head list;
spinlock_t task_state_lock;
unsigned task_state_flags;
enum sas_proto task_proto;
/* Used by the discovery code. */
struct timer_list timer;
struct completion completion;
union {
struct sas_ata_task ata_task;
struct sas_smp_task smp_task;
struct sas_ssp_task ssp_task;
};
struct scatterlist *scatter;
int num_scatter;
u32 total_xfer_len;
u8 data_dir:2; /* Use PCI_DMA_... */
struct task_status_struct task_status;
void (*task_done)(struct sas_task *);
void *lldd_task; /* for use by LLDDs */
void *uldd_task;
struct work_struct abort_work;
};
#define SAS_TASK_STATE_PENDING 1
#define SAS_TASK_STATE_DONE 2
#define SAS_TASK_STATE_ABORTED 4
#define SAS_TASK_NEED_DEV_RESET 8
#define SAS_TASK_AT_INITIATOR 16
static inline struct sas_task *sas_alloc_task(gfp_t flags)
{
extern struct kmem_cache *sas_task_cache;
struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
if (task) {
INIT_LIST_HEAD(&task->list);
spin_lock_init(&task->task_state_lock);
task->task_state_flags = SAS_TASK_STATE_PENDING;
init_timer(&task->timer);
init_completion(&task->completion);
}
return task;
}
static inline void sas_free_task(struct sas_task *task)
{
if (task) {
extern struct kmem_cache *sas_task_cache;
BUG_ON(!list_empty(&task->list));
kmem_cache_free(sas_task_cache, task);
}
}
struct sas_domain_function_template {
/* The class calls these to notify the LLDD of an event. */
void (*lldd_port_formed)(struct asd_sas_phy *);
void (*lldd_port_deformed)(struct asd_sas_phy *);
/* The class calls these when a device is found or gone. */
int (*lldd_dev_found)(struct domain_device *);
void (*lldd_dev_gone)(struct domain_device *);
int (*lldd_execute_task)(struct sas_task *, int num,
gfp_t gfp_flags);
/* Task Management Functions. Must be called from process context. */
int (*lldd_abort_task)(struct sas_task *);
int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
int (*lldd_I_T_nexus_reset)(struct domain_device *);
int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
int (*lldd_query_task)(struct sas_task *);
/* Port and Adapter management */
int (*lldd_clear_nexus_port)(struct asd_sas_port *);
int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
/* Phy management */
int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
};
extern int sas_register_ha(struct sas_ha_struct *);
extern int sas_unregister_ha(struct sas_ha_struct *);
int sas_set_phy_speed(struct sas_phy *phy,
struct sas_phy_linkrates *rates);
int sas_phy_enable(struct sas_phy *phy, int enabled);
int sas_phy_reset(struct sas_phy *phy, int hard_reset);
extern int sas_queuecommand(struct scsi_cmnd *,
void (*scsi_done)(struct scsi_cmnd *));
extern int sas_target_alloc(struct scsi_target *);
extern int sas_slave_alloc(struct scsi_device *);
extern int sas_slave_configure(struct scsi_device *);
extern void sas_slave_destroy(struct scsi_device *);
extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
extern int sas_change_queue_type(struct scsi_device *, int qt);
extern int sas_bios_param(struct scsi_device *,
struct block_device *,
sector_t capacity, int *hsc);
extern struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *);
extern void sas_domain_release_transport(struct scsi_transport_template *);
int sas_discover_root_expander(struct domain_device *);
void sas_init_ex_attr(void);
int sas_ex_revalidate_domain(struct domain_device *);
void sas_unregister_domain_devices(struct asd_sas_port *port);
void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
int sas_discover_sata(struct domain_device *);
int sas_discover_end_dev(struct domain_device *);
void sas_unregister_dev(struct domain_device *);
void sas_init_dev(struct domain_device *);
void sas_task_abort(struct sas_task *);
int __sas_task_abort(struct sas_task *);
int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
#endif /* _SASLIB_H_ */

77
include/scsi/libsrp.h Normal file
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#ifndef __LIBSRP_H__
#define __LIBSRP_H__
#include <linux/list.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <scsi/srp.h>
enum iue_flags {
V_DIOVER,
V_WRITE,
V_LINKED,
V_FLYING,
};
struct srp_buf {
dma_addr_t dma;
void *buf;
};
struct srp_queue {
void *pool;
void *items;
struct kfifo *queue;
spinlock_t lock;
};
struct srp_target {
struct Scsi_Host *shost;
struct device *dev;
spinlock_t lock;
struct list_head cmd_queue;
size_t srp_iu_size;
struct srp_queue iu_queue;
size_t rx_ring_size;
struct srp_buf **rx_ring;
void *ldata;
};
struct iu_entry {
struct srp_target *target;
struct list_head ilist;
dma_addr_t remote_token;
unsigned long flags;
struct srp_buf *sbuf;
};
typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
struct srp_direct_buf *, int,
enum dma_data_direction, unsigned int);
extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
extern void srp_target_free(struct srp_target *);
extern struct iu_entry *srp_iu_get(struct srp_target *);
extern void srp_iu_put(struct iu_entry *);
extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64);
extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
srp_rdma_t, int, int);
static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
{
return (struct srp_target *) host->hostdata;
}
static inline int srp_cmd_direction(struct srp_cmd *cmd)
{
return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
}
#endif

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include/scsi/sas.h Normal file
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/*
* SAS structures and definitions header file
*
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
*
* This file is licensed under GPLv2.
*
* 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 _SAS_H_
#define _SAS_H_
#include <linux/types.h>
#include <asm/byteorder.h>
#define SAS_ADDR_SIZE 8
#define HASHED_SAS_ADDR_SIZE 3
#define SAS_ADDR(_sa) ((unsigned long long) be64_to_cpu(*(__be64 *)(_sa)))
#define SMP_REQUEST 0x40
#define SMP_RESPONSE 0x41
#define SSP_DATA 0x01
#define SSP_XFER_RDY 0x05
#define SSP_COMMAND 0x06
#define SSP_RESPONSE 0x07
#define SSP_TASK 0x16
#define SMP_REPORT_GENERAL 0x00
#define SMP_REPORT_MANUF_INFO 0x01
#define SMP_READ_GPIO_REG 0x02
#define SMP_DISCOVER 0x10
#define SMP_REPORT_PHY_ERR_LOG 0x11
#define SMP_REPORT_PHY_SATA 0x12
#define SMP_REPORT_ROUTE_INFO 0x13
#define SMP_WRITE_GPIO_REG 0x82
#define SMP_CONF_ROUTE_INFO 0x90
#define SMP_PHY_CONTROL 0x91
#define SMP_PHY_TEST_FUNCTION 0x92
#define SMP_RESP_FUNC_ACC 0x00
#define SMP_RESP_FUNC_UNK 0x01
#define SMP_RESP_FUNC_FAILED 0x02
#define SMP_RESP_INV_FRM_LEN 0x03
#define SMP_RESP_NO_PHY 0x10
#define SMP_RESP_NO_INDEX 0x11
#define SMP_RESP_PHY_NO_SATA 0x12
#define SMP_RESP_PHY_UNK_OP 0x13
#define SMP_RESP_PHY_UNK_TESTF 0x14
#define SMP_RESP_PHY_TEST_INPROG 0x15
#define SMP_RESP_PHY_VACANT 0x16
/* SAM TMFs */
#define TMF_ABORT_TASK 0x01
#define TMF_ABORT_TASK_SET 0x02
#define TMF_CLEAR_TASK_SET 0x04
#define TMF_LU_RESET 0x08
#define TMF_CLEAR_ACA 0x40
#define TMF_QUERY_TASK 0x80
/* SAS TMF responses */
#define TMF_RESP_FUNC_COMPLETE 0x00
#define TMF_RESP_INVALID_FRAME 0x02
#define TMF_RESP_FUNC_ESUPP 0x04
#define TMF_RESP_FUNC_FAILED 0x05
#define TMF_RESP_FUNC_SUCC 0x08
#define TMF_RESP_NO_LUN 0x09
#define TMF_RESP_OVERLAPPED_TAG 0x0A
enum sas_oob_mode {
OOB_NOT_CONNECTED,
SATA_OOB_MODE,
SAS_OOB_MODE
};
/* See sas_discover.c if you plan on changing these.
*/
enum sas_dev_type {
NO_DEVICE = 0, /* protocol */
SAS_END_DEV = 1, /* protocol */
EDGE_DEV = 2, /* protocol */
FANOUT_DEV = 3, /* protocol */
SAS_HA = 4,
SATA_DEV = 5,
SATA_PM = 7,
SATA_PM_PORT= 8,
};
/* Partly from IDENTIFY address frame. */
enum sas_proto {
SATA_PROTO = 1,
SAS_PROTO_SMP = 2, /* protocol */
SAS_PROTO_STP = 4, /* protocol */
SAS_PROTO_SSP = 8, /* protocol */
SAS_PROTO_ALL = 0xE,
};
/* From the spec; local phys only */
enum phy_func {
PHY_FUNC_NOP,
PHY_FUNC_LINK_RESET, /* Enables the phy */
PHY_FUNC_HARD_RESET,
PHY_FUNC_DISABLE,
PHY_FUNC_CLEAR_ERROR_LOG = 5,
PHY_FUNC_CLEAR_AFFIL,
PHY_FUNC_TX_SATA_PS_SIGNAL,
PHY_FUNC_RELEASE_SPINUP_HOLD = 0x10, /* LOCAL PORT ONLY! */
PHY_FUNC_SET_LINK_RATE,
};
/* SAS LLDD would need to report only _very_few_ of those, like BROADCAST.
* Most of those are here for completeness.
*/
enum sas_prim {
SAS_PRIM_AIP_NORMAL = 1,
SAS_PRIM_AIP_R0 = 2,
SAS_PRIM_AIP_R1 = 3,
SAS_PRIM_AIP_R2 = 4,
SAS_PRIM_AIP_WC = 5,
SAS_PRIM_AIP_WD = 6,
SAS_PRIM_AIP_WP = 7,
SAS_PRIM_AIP_RWP = 8,
SAS_PRIM_BC_CH = 9,
SAS_PRIM_BC_RCH0 = 10,
SAS_PRIM_BC_RCH1 = 11,
SAS_PRIM_BC_R0 = 12,
SAS_PRIM_BC_R1 = 13,
SAS_PRIM_BC_R2 = 14,
SAS_PRIM_BC_R3 = 15,
SAS_PRIM_BC_R4 = 16,
SAS_PRIM_NOTIFY_ENSP= 17,
SAS_PRIM_NOTIFY_R0 = 18,
SAS_PRIM_NOTIFY_R1 = 19,
SAS_PRIM_NOTIFY_R2 = 20,
SAS_PRIM_CLOSE_CLAF = 21,
SAS_PRIM_CLOSE_NORM = 22,
SAS_PRIM_CLOSE_R0 = 23,
SAS_PRIM_CLOSE_R1 = 24,
SAS_PRIM_OPEN_RTRY = 25,
SAS_PRIM_OPEN_RJCT = 26,
SAS_PRIM_OPEN_ACPT = 27,
SAS_PRIM_DONE = 28,
SAS_PRIM_BREAK = 29,
SATA_PRIM_DMAT = 33,
SATA_PRIM_PMNAK = 34,
SATA_PRIM_PMACK = 35,
SATA_PRIM_PMREQ_S = 36,
SATA_PRIM_PMREQ_P = 37,
SATA_SATA_R_ERR = 38,
};
enum sas_open_rej_reason {
/* Abandon open */
SAS_OREJ_UNKNOWN = 0,
SAS_OREJ_BAD_DEST = 1,
SAS_OREJ_CONN_RATE = 2,
SAS_OREJ_EPROTO = 3,
SAS_OREJ_RESV_AB0 = 4,
SAS_OREJ_RESV_AB1 = 5,
SAS_OREJ_RESV_AB2 = 6,
SAS_OREJ_RESV_AB3 = 7,
SAS_OREJ_WRONG_DEST= 8,
SAS_OREJ_STP_NORES = 9,
/* Retry open */
SAS_OREJ_NO_DEST = 10,
SAS_OREJ_PATH_BLOCKED = 11,
SAS_OREJ_RSVD_CONT0 = 12,
SAS_OREJ_RSVD_CONT1 = 13,
SAS_OREJ_RSVD_INIT0 = 14,
SAS_OREJ_RSVD_INIT1 = 15,
SAS_OREJ_RSVD_STOP0 = 16,
SAS_OREJ_RSVD_STOP1 = 17,
SAS_OREJ_RSVD_RETRY = 18,
};
struct dev_to_host_fis {
u8 fis_type; /* 0x34 */
u8 flags;
u8 status;
u8 error;
u8 lbal;
union { u8 lbam; u8 byte_count_low; };
union { u8 lbah; u8 byte_count_high; };
u8 device;
u8 lbal_exp;
u8 lbam_exp;
u8 lbah_exp;
u8 _r_a;
union { u8 sector_count; u8 interrupt_reason; };
u8 sector_count_exp;
u8 _r_b;
u8 _r_c;
u32 _r_d;
} __attribute__ ((packed));
struct host_to_dev_fis {
u8 fis_type; /* 0x27 */
u8 flags;
u8 command;
u8 features;
u8 lbal;
union { u8 lbam; u8 byte_count_low; };
union { u8 lbah; u8 byte_count_high; };
u8 device;
u8 lbal_exp;
u8 lbam_exp;
u8 lbah_exp;
u8 features_exp;
union { u8 sector_count; u8 interrupt_reason; };
u8 sector_count_exp;
u8 _r_a;
u8 control;
u32 _r_b;
} __attribute__ ((packed));
/* Prefer to have code clarity over header file clarity.
*/
#ifdef __LITTLE_ENDIAN_BITFIELD
struct sas_identify_frame {
/* Byte 0 */
u8 frame_type:4;
u8 dev_type:3;
u8 _un0:1;
/* Byte 1 */
u8 _un1;
/* Byte 2 */
union {
struct {
u8 _un20:1;
u8 smp_iport:1;
u8 stp_iport:1;
u8 ssp_iport:1;
u8 _un247:4;
};
u8 initiator_bits;
};
/* Byte 3 */
union {
struct {
u8 _un30:1;
u8 smp_tport:1;
u8 stp_tport:1;
u8 ssp_tport:1;
u8 _un347:4;
};
u8 target_bits;
};
/* Byte 4 - 11 */
u8 _un4_11[8];
/* Byte 12 - 19 */
u8 sas_addr[SAS_ADDR_SIZE];
/* Byte 20 */
u8 phy_id;
u8 _un21_27[7];
__be32 crc;
} __attribute__ ((packed));
struct ssp_frame_hdr {
u8 frame_type;
u8 hashed_dest_addr[HASHED_SAS_ADDR_SIZE];
u8 _r_a;
u8 hashed_src_addr[HASHED_SAS_ADDR_SIZE];
__be16 _r_b;
u8 changing_data_ptr:1;
u8 retransmit:1;
u8 retry_data_frames:1;
u8 _r_c:5;
u8 num_fill_bytes:2;
u8 _r_d:6;
u32 _r_e;
__be16 tag;
__be16 tptt;
__be32 data_offs;
} __attribute__ ((packed));
struct ssp_response_iu {
u8 _r_a[10];
u8 datapres:2;
u8 _r_b:6;
u8 status;
u32 _r_c;
__be32 sense_data_len;
__be32 response_data_len;
u8 resp_data[0];
u8 sense_data[0];
} __attribute__ ((packed));
/* ---------- SMP ---------- */
struct report_general_resp {
__be16 change_count;
__be16 route_indexes;
u8 _r_a;
u8 num_phys;
u8 conf_route_table:1;
u8 configuring:1;
u8 _r_b:6;
u8 _r_c;
u8 enclosure_logical_id[8];
u8 _r_d[12];
} __attribute__ ((packed));
struct discover_resp {
u8 _r_a[5];
u8 phy_id;
__be16 _r_b;
u8 _r_c:4;
u8 attached_dev_type:3;
u8 _r_d:1;
u8 linkrate:4;
u8 _r_e:4;
u8 attached_sata_host:1;
u8 iproto:3;
u8 _r_f:4;
u8 attached_sata_dev:1;
u8 tproto:3;
u8 _r_g:3;
u8 attached_sata_ps:1;
u8 sas_addr[8];
u8 attached_sas_addr[8];
u8 attached_phy_id;
u8 _r_h[7];
u8 hmin_linkrate:4;
u8 pmin_linkrate:4;
u8 hmax_linkrate:4;
u8 pmax_linkrate:4;
u8 change_count;
u8 pptv:4;
u8 _r_i:3;
u8 virtual:1;
u8 routing_attr:4;
u8 _r_j:4;
u8 conn_type;
u8 conn_el_index;
u8 conn_phy_link;
u8 _r_k[8];
} __attribute__ ((packed));
struct report_phy_sata_resp {
u8 _r_a[5];
u8 phy_id;
u8 _r_b;
u8 affil_valid:1;
u8 affil_supp:1;
u8 _r_c:6;
u32 _r_d;
u8 stp_sas_addr[8];
struct dev_to_host_fis fis;
u32 _r_e;
u8 affil_stp_ini_addr[8];
__be32 crc;
} __attribute__ ((packed));
struct smp_resp {
u8 frame_type;
u8 function;
u8 result;
u8 reserved;
union {
struct report_general_resp rg;
struct discover_resp disc;
struct report_phy_sata_resp rps;
};
} __attribute__ ((packed));
#elif defined(__BIG_ENDIAN_BITFIELD)
struct sas_identify_frame {
/* Byte 0 */
u8 _un0:1;
u8 dev_type:3;
u8 frame_type:4;
/* Byte 1 */
u8 _un1;
/* Byte 2 */
union {
struct {
u8 _un247:4;
u8 ssp_iport:1;
u8 stp_iport:1;
u8 smp_iport:1;
u8 _un20:1;
};
u8 initiator_bits;
};
/* Byte 3 */
union {
struct {
u8 _un347:4;
u8 ssp_tport:1;
u8 stp_tport:1;
u8 smp_tport:1;
u8 _un30:1;
};
u8 target_bits;
};
/* Byte 4 - 11 */
u8 _un4_11[8];
/* Byte 12 - 19 */
u8 sas_addr[SAS_ADDR_SIZE];
/* Byte 20 */
u8 phy_id;
u8 _un21_27[7];
__be32 crc;
} __attribute__ ((packed));
struct ssp_frame_hdr {
u8 frame_type;
u8 hashed_dest_addr[HASHED_SAS_ADDR_SIZE];
u8 _r_a;
u8 hashed_src_addr[HASHED_SAS_ADDR_SIZE];
__be16 _r_b;
u8 _r_c:5;
u8 retry_data_frames:1;
u8 retransmit:1;
u8 changing_data_ptr:1;
u8 _r_d:6;
u8 num_fill_bytes:2;
u32 _r_e;
__be16 tag;
__be16 tptt;
__be32 data_offs;
} __attribute__ ((packed));
struct ssp_response_iu {
u8 _r_a[10];
u8 _r_b:6;
u8 datapres:2;
u8 status;
u32 _r_c;
__be32 sense_data_len;
__be32 response_data_len;
u8 resp_data[0];
u8 sense_data[0];
} __attribute__ ((packed));
/* ---------- SMP ---------- */
struct report_general_resp {
__be16 change_count;
__be16 route_indexes;
u8 _r_a;
u8 num_phys;
u8 _r_b:6;
u8 configuring:1;
u8 conf_route_table:1;
u8 _r_c;
u8 enclosure_logical_id[8];
u8 _r_d[12];
} __attribute__ ((packed));
struct discover_resp {
u8 _r_a[5];
u8 phy_id;
__be16 _r_b;
u8 _r_d:1;
u8 attached_dev_type:3;
u8 _r_c:4;
u8 _r_e:4;
u8 linkrate:4;
u8 _r_f:4;
u8 iproto:3;
u8 attached_sata_host:1;
u8 attached_sata_ps:1;
u8 _r_g:3;
u8 tproto:3;
u8 attached_sata_dev:1;
u8 sas_addr[8];
u8 attached_sas_addr[8];
u8 attached_phy_id;
u8 _r_h[7];
u8 pmin_linkrate:4;
u8 hmin_linkrate:4;
u8 pmax_linkrate:4;
u8 hmax_linkrate:4;
u8 change_count;
u8 virtual:1;
u8 _r_i:3;
u8 pptv:4;
u8 _r_j:4;
u8 routing_attr:4;
u8 conn_type;
u8 conn_el_index;
u8 conn_phy_link;
u8 _r_k[8];
} __attribute__ ((packed));
struct report_phy_sata_resp {
u8 _r_a[5];
u8 phy_id;
u8 _r_b;
u8 _r_c:6;
u8 affil_supp:1;
u8 affil_valid:1;
u32 _r_d;
u8 stp_sas_addr[8];
struct dev_to_host_fis fis;
u32 _r_e;
u8 affil_stp_ini_addr[8];
__be32 crc;
} __attribute__ ((packed));
struct smp_resp {
u8 frame_type;
u8 function;
u8 result;
u8 reserved;
union {
struct report_general_resp rg;
struct discover_resp disc;
struct report_phy_sata_resp rps;
};
} __attribute__ ((packed));
#else
#error "Bitfield order not defined!"
#endif
#endif /* _SAS_H_ */

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/*
* This header file contains public constants and structures used by
* the scsi code for linux.
*
* For documentation on the OPCODES, MESSAGES, and SENSE values,
* please consult the SCSI standard.
*/
#ifndef _SCSI_SCSI_H
#define _SCSI_SCSI_H
#include <linux/types.h>
/*
* The maximum sg list length SCSI can cope with
* (currently must be a power of 2 between 32 and 256)
*/
#define SCSI_MAX_PHYS_SEGMENTS MAX_PHYS_SEGMENTS
/*
* SCSI command lengths
*/
extern const unsigned char scsi_command_size[8];
#define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]
/*
* Special value for scanning to specify scanning or rescanning of all
* possible channels, (target) ids, or luns on a given shost.
*/
#define SCAN_WILD_CARD ~0
/*
* SCSI opcodes
*/
#define TEST_UNIT_READY 0x00
#define REZERO_UNIT 0x01
#define REQUEST_SENSE 0x03
#define FORMAT_UNIT 0x04
#define READ_BLOCK_LIMITS 0x05
#define REASSIGN_BLOCKS 0x07
#define INITIALIZE_ELEMENT_STATUS 0x07
#define READ_6 0x08
#define WRITE_6 0x0a
#define SEEK_6 0x0b
#define READ_REVERSE 0x0f
#define WRITE_FILEMARKS 0x10
#define SPACE 0x11
#define INQUIRY 0x12
#define RECOVER_BUFFERED_DATA 0x14
#define MODE_SELECT 0x15
#define RESERVE 0x16
#define RELEASE 0x17
#define COPY 0x18
#define ERASE 0x19
#define MODE_SENSE 0x1a
#define START_STOP 0x1b
#define RECEIVE_DIAGNOSTIC 0x1c
#define SEND_DIAGNOSTIC 0x1d
#define ALLOW_MEDIUM_REMOVAL 0x1e
#define SET_WINDOW 0x24
#define READ_CAPACITY 0x25
#define READ_10 0x28
#define WRITE_10 0x2a
#define SEEK_10 0x2b
#define POSITION_TO_ELEMENT 0x2b
#define WRITE_VERIFY 0x2e
#define VERIFY 0x2f
#define SEARCH_HIGH 0x30
#define SEARCH_EQUAL 0x31
#define SEARCH_LOW 0x32
#define SET_LIMITS 0x33
#define PRE_FETCH 0x34
#define READ_POSITION 0x34
#define SYNCHRONIZE_CACHE 0x35
#define LOCK_UNLOCK_CACHE 0x36
#define READ_DEFECT_DATA 0x37
#define MEDIUM_SCAN 0x38
#define COMPARE 0x39
#define COPY_VERIFY 0x3a
#define WRITE_BUFFER 0x3b
#define READ_BUFFER 0x3c
#define UPDATE_BLOCK 0x3d
#define READ_LONG 0x3e
#define WRITE_LONG 0x3f
#define CHANGE_DEFINITION 0x40
#define WRITE_SAME 0x41
#define READ_TOC 0x43
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
#define MODE_SELECT_10 0x55
#define RESERVE_10 0x56
#define RELEASE_10 0x57
#define MODE_SENSE_10 0x5a
#define PERSISTENT_RESERVE_IN 0x5e
#define PERSISTENT_RESERVE_OUT 0x5f
#define REPORT_LUNS 0xa0
#define MAINTENANCE_IN 0xa3
#define MOVE_MEDIUM 0xa5
#define EXCHANGE_MEDIUM 0xa6
#define READ_12 0xa8
#define WRITE_12 0xaa
#define WRITE_VERIFY_12 0xae
#define SEARCH_HIGH_12 0xb0
#define SEARCH_EQUAL_12 0xb1
#define SEARCH_LOW_12 0xb2
#define READ_ELEMENT_STATUS 0xb8
#define SEND_VOLUME_TAG 0xb6
#define WRITE_LONG_2 0xea
#define READ_16 0x88
#define WRITE_16 0x8a
#define VERIFY_16 0x8f
#define SERVICE_ACTION_IN 0x9e
/* values for service action in */
#define SAI_READ_CAPACITY_16 0x10
/* values for maintenance in */
#define MI_REPORT_TARGET_PGS 0x0a
/* Values for T10/04-262r7 */
#define ATA_16 0x85 /* 16-byte pass-thru */
#define ATA_12 0xa1 /* 12-byte pass-thru */
/*
* SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
* T10/1561-D Revision 4 Draft dated 7th November 2002.
*/
#define SAM_STAT_GOOD 0x00
#define SAM_STAT_CHECK_CONDITION 0x02
#define SAM_STAT_CONDITION_MET 0x04
#define SAM_STAT_BUSY 0x08
#define SAM_STAT_INTERMEDIATE 0x10
#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
#define SAM_STAT_RESERVATION_CONFLICT 0x18
#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
#define SAM_STAT_TASK_SET_FULL 0x28
#define SAM_STAT_ACA_ACTIVE 0x30
#define SAM_STAT_TASK_ABORTED 0x40
/** scsi_status_is_good - check the status return.
*
* @status: the status passed up from the driver (including host and
* driver components)
*
* This returns true for known good conditions that may be treated as
* command completed normally
*/
static inline int scsi_status_is_good(int status)
{
/*
* FIXME: bit0 is listed as reserved in SCSI-2, but is
* significant in SCSI-3. For now, we follow the SCSI-2
* behaviour and ignore reserved bits.
*/
status &= 0xfe;
return ((status == SAM_STAT_GOOD) ||
(status == SAM_STAT_INTERMEDIATE) ||
(status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
/* FIXME: this is obsolete in SAM-3 */
(status == SAM_STAT_COMMAND_TERMINATED));
}
/*
* Status codes. These are deprecated as they are shifted 1 bit right
* from those found in the SCSI standards. This causes confusion for
* applications that are ported to several OSes. Prefer SAM Status codes
* above.
*/
#define GOOD 0x00
#define CHECK_CONDITION 0x01
#define CONDITION_GOOD 0x02
#define BUSY 0x04
#define INTERMEDIATE_GOOD 0x08
#define INTERMEDIATE_C_GOOD 0x0a
#define RESERVATION_CONFLICT 0x0c
#define COMMAND_TERMINATED 0x11
#define QUEUE_FULL 0x14
#define ACA_ACTIVE 0x18
#define TASK_ABORTED 0x20
#define STATUS_MASK 0xfe
/*
* SENSE KEYS
*/
#define NO_SENSE 0x00
#define RECOVERED_ERROR 0x01
#define NOT_READY 0x02
#define MEDIUM_ERROR 0x03
#define HARDWARE_ERROR 0x04
#define ILLEGAL_REQUEST 0x05
#define UNIT_ATTENTION 0x06
#define DATA_PROTECT 0x07
#define BLANK_CHECK 0x08
#define COPY_ABORTED 0x0a
#define ABORTED_COMMAND 0x0b
#define VOLUME_OVERFLOW 0x0d
#define MISCOMPARE 0x0e
/*
* DEVICE TYPES
*/
#define TYPE_DISK 0x00
#define TYPE_TAPE 0x01
#define TYPE_PRINTER 0x02
#define TYPE_PROCESSOR 0x03 /* HP scanners use this */
#define TYPE_WORM 0x04 /* Treated as ROM by our system */
#define TYPE_ROM 0x05
#define TYPE_SCANNER 0x06
#define TYPE_MOD 0x07 /* Magneto-optical disk -
* - treated as TYPE_DISK */
#define TYPE_MEDIUM_CHANGER 0x08
#define TYPE_COMM 0x09 /* Communications device */
#define TYPE_RAID 0x0c
#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
#define TYPE_RBC 0x0e
#define TYPE_NO_LUN 0x7f
/* Returns a human-readable name for the device */
extern const char * scsi_device_type(unsigned type);
/*
* standard mode-select header prepended to all mode-select commands
*/
struct ccs_modesel_head {
__u8 _r1; /* reserved */
__u8 medium; /* device-specific medium type */
__u8 _r2; /* reserved */
__u8 block_desc_length; /* block descriptor length */
__u8 density; /* device-specific density code */
__u8 number_blocks_hi; /* number of blocks in this block desc */
__u8 number_blocks_med;
__u8 number_blocks_lo;
__u8 _r3;
__u8 block_length_hi; /* block length for blocks in this desc */
__u8 block_length_med;
__u8 block_length_lo;
};
/*
* ScsiLun: 8 byte LUN.
*/
struct scsi_lun {
__u8 scsi_lun[8];
};
/*
* MESSAGE CODES
*/
#define COMMAND_COMPLETE 0x00
#define EXTENDED_MESSAGE 0x01
#define EXTENDED_MODIFY_DATA_POINTER 0x00
#define EXTENDED_SDTR 0x01
#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
#define EXTENDED_WDTR 0x03
#define EXTENDED_PPR 0x04
#define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
#define SAVE_POINTERS 0x02
#define RESTORE_POINTERS 0x03
#define DISCONNECT 0x04
#define INITIATOR_ERROR 0x05
#define ABORT_TASK_SET 0x06
#define MESSAGE_REJECT 0x07
#define NOP 0x08
#define MSG_PARITY_ERROR 0x09
#define LINKED_CMD_COMPLETE 0x0a
#define LINKED_FLG_CMD_COMPLETE 0x0b
#define TARGET_RESET 0x0c
#define ABORT_TASK 0x0d
#define CLEAR_TASK_SET 0x0e
#define INITIATE_RECOVERY 0x0f /* SCSI-II only */
#define RELEASE_RECOVERY 0x10 /* SCSI-II only */
#define CLEAR_ACA 0x16
#define LOGICAL_UNIT_RESET 0x17
#define SIMPLE_QUEUE_TAG 0x20
#define HEAD_OF_QUEUE_TAG 0x21
#define ORDERED_QUEUE_TAG 0x22
#define IGNORE_WIDE_RESIDUE 0x23
#define ACA 0x24
#define QAS_REQUEST 0x55
/* Old SCSI2 names, don't use in new code */
#define BUS_DEVICE_RESET TARGET_RESET
#define ABORT ABORT_TASK_SET
/*
* Host byte codes
*/
#define DID_OK 0x00 /* NO error */
#define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
#define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
#define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
#define DID_BAD_TARGET 0x04 /* BAD target. */
#define DID_ABORT 0x05 /* Told to abort for some other reason */
#define DID_PARITY 0x06 /* Parity error */
#define DID_ERROR 0x07 /* Internal error */
#define DID_RESET 0x08 /* Reset by somebody. */
#define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
#define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
#define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
#define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
#define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
* without decrementing the retry count */
#define DRIVER_OK 0x00 /* Driver status */
/*
* These indicate the error that occurred, and what is available.
*/
#define DRIVER_BUSY 0x01
#define DRIVER_SOFT 0x02
#define DRIVER_MEDIA 0x03
#define DRIVER_ERROR 0x04
#define DRIVER_INVALID 0x05
#define DRIVER_TIMEOUT 0x06
#define DRIVER_HARD 0x07
#define DRIVER_SENSE 0x08
#define SUGGEST_RETRY 0x10
#define SUGGEST_ABORT 0x20
#define SUGGEST_REMAP 0x30
#define SUGGEST_DIE 0x40
#define SUGGEST_SENSE 0x80
#define SUGGEST_IS_OK 0xff
#define DRIVER_MASK 0x0f
#define SUGGEST_MASK 0xf0
/*
* Internal return values.
*/
#define NEEDS_RETRY 0x2001
#define SUCCESS 0x2002
#define FAILED 0x2003
#define QUEUED 0x2004
#define SOFT_ERROR 0x2005
#define ADD_TO_MLQUEUE 0x2006
#define TIMEOUT_ERROR 0x2007
/*
* Midlevel queue return values.
*/
#define SCSI_MLQUEUE_HOST_BUSY 0x1055
#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
#define SCSI_MLQUEUE_EH_RETRY 0x1057
/*
* Use these to separate status msg and our bytes
*
* These are set by:
*
* status byte = set from target device
* msg_byte = return status from host adapter itself.
* host_byte = set by low-level driver to indicate status.
* driver_byte = set by mid-level.
*/
#define status_byte(result) (((result) >> 1) & 0x7f)
#define msg_byte(result) (((result) >> 8) & 0xff)
#define host_byte(result) (((result) >> 16) & 0xff)
#define driver_byte(result) (((result) >> 24) & 0xff)
#define suggestion(result) (driver_byte(result) & SUGGEST_MASK)
#define sense_class(sense) (((sense) >> 4) & 0x7)
#define sense_error(sense) ((sense) & 0xf)
#define sense_valid(sense) ((sense) & 0x80);
/*
* default timeouts
*/
#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
#define START_STOP_TIMEOUT (60 * HZ)
#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
#define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
#define IDENTIFY_BASE 0x80
#define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
((can_disconnect) ? 0x40 : 0) |\
((lun) & 0x07))
/*
* struct scsi_device::scsi_level values. For SCSI devices other than those
* prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
* where "resp" is a byte array of the response to an INQUIRY. The scsi_level
* variable is visible to the user via sysfs.
*/
#define SCSI_UNKNOWN 0
#define SCSI_1 1
#define SCSI_1_CCS 2
#define SCSI_2 3
#define SCSI_3 4 /* SPC */
#define SCSI_SPC_2 5
#define SCSI_SPC_3 6
/*
* INQ PERIPHERAL QUALIFIERS
*/
#define SCSI_INQ_PQ_CON 0x00
#define SCSI_INQ_PQ_NOT_CON 0x01
#define SCSI_INQ_PQ_NOT_CAP 0x03
/*
* Here are some scsi specific ioctl commands which are sometimes useful.
*
* Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
*/
/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
#define SCSI_IOCTL_GET_IDLUN 0x5382
/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
/* Used to obtain the host number of a device. */
#define SCSI_IOCTL_PROBE_HOST 0x5385
/* Used to obtain the bus number for a device */
#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
/* Used to obtain the PCI location of a device */
#define SCSI_IOCTL_GET_PCI 0x5387
/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
static inline __u32 scsi_to_u32(__u8 *ptr)
{
return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
}
#endif /* _SCSI_SCSI_H */

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#ifndef _SCSI_SCSI_CMND_H
#define _SCSI_SCSI_CMND_H
#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/timer.h>
struct request;
struct scatterlist;
struct Scsi_Host;
struct scsi_device;
/* embedded in scsi_cmnd */
struct scsi_pointer {
char *ptr; /* data pointer */
int this_residual; /* left in this buffer */
struct scatterlist *buffer; /* which buffer */
int buffers_residual; /* how many buffers left */
dma_addr_t dma_handle;
volatile int Status;
volatile int Message;
volatile int have_data_in;
volatile int sent_command;
volatile int phase;
};
struct scsi_cmnd {
struct scsi_device *device;
struct list_head list; /* scsi_cmnd participates in queue lists */
struct list_head eh_entry; /* entry for the host eh_cmd_q */
int eh_eflags; /* Used by error handlr */
void (*done) (struct scsi_cmnd *); /* Mid-level done function */
/*
* A SCSI Command is assigned a nonzero serial_number before passed
* to the driver's queue command function. The serial_number is
* cleared when scsi_done is entered indicating that the command
* has been completed. It currently doesn't have much use other
* than printk's. Some lldd's use this number for other purposes.
* It's almost certain that such usages are either incorrect or
* meaningless. Please kill all usages other than printk's. Also,
* as this number is always identical to ->pid, please convert
* printk's to use ->pid, so that we can kill this field.
*/
unsigned long serial_number;
/*
* This is set to jiffies as it was when the command was first
* allocated. It is used to time how long the command has
* been outstanding
*/
unsigned long jiffies_at_alloc;
int retries;
int allowed;
int timeout_per_command;
unsigned char cmd_len;
enum dma_data_direction sc_data_direction;
/* These elements define the operation we are about to perform */
#define MAX_COMMAND_SIZE 16
unsigned char cmnd[MAX_COMMAND_SIZE];
unsigned request_bufflen; /* Actual request size */
struct timer_list eh_timeout; /* Used to time out the command. */
void *request_buffer; /* Actual requested buffer */
/* These elements define the operation we ultimately want to perform */
unsigned short use_sg; /* Number of pieces of scatter-gather */
unsigned short sglist_len; /* size of malloc'd scatter-gather list */
/* offset in cmd we are at (for multi-transfer tgt cmds) */
unsigned offset;
unsigned underflow; /* Return error if less than
this amount is transferred */
unsigned transfersize; /* How much we are guaranteed to
transfer with each SCSI transfer
(ie, between disconnect /
reconnects. Probably == sector
size */
int resid; /* Number of bytes requested to be
transferred less actual number
transferred (0 if not supported) */
struct request *request; /* The command we are
working on */
#define SCSI_SENSE_BUFFERSIZE 96
unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE];
/* obtained by REQUEST SENSE when
* CHECK CONDITION is received on original
* command (auto-sense) */
/* Low-level done function - can be used by low-level driver to point
* to completion function. Not used by mid/upper level code. */
void (*scsi_done) (struct scsi_cmnd *);
/*
* The following fields can be written to by the host specific code.
* Everything else should be left alone.
*/
struct scsi_pointer SCp; /* Scratchpad used by some host adapters */
unsigned char *host_scribble; /* The host adapter is allowed to
* call scsi_malloc and get some memory
* and hang it here. The host adapter
* is also expected to call scsi_free
* to release this memory. (The memory
* obtained by scsi_malloc is guaranteed
* to be at an address < 16Mb). */
int result; /* Status code from lower level driver */
unsigned char tag; /* SCSI-II queued command tag */
unsigned long pid; /* Process ID, starts at 0. Unique per host. */
};
extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t);
extern struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *, gfp_t);
extern void scsi_put_command(struct scsi_cmnd *);
extern void __scsi_put_command(struct Scsi_Host *, struct scsi_cmnd *,
struct device *);
extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
extern void scsi_finish_command(struct scsi_cmnd *cmd);
extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd);
extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
size_t *offset, size_t *len);
extern void scsi_kunmap_atomic_sg(void *virt);
extern struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t);
extern void scsi_free_sgtable(struct scatterlist *, int);
#endif /* _SCSI_SCSI_CMND_H */

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#ifndef _SCSI_SCSI_DBG_H
#define _SCSI_SCSI_DBG_H
struct scsi_cmnd;
struct scsi_sense_hdr;
extern void scsi_print_command(struct scsi_cmnd *);
extern void scsi_print_sense_hdr(const char *, struct scsi_sense_hdr *);
extern void __scsi_print_command(unsigned char *);
extern void scsi_print_sense(const char *, struct scsi_cmnd *);
extern void __scsi_print_sense(const char *name,
const unsigned char *sense_buffer,
int sense_len);
extern void scsi_print_driverbyte(int);
extern void scsi_print_hostbyte(int);
extern void scsi_print_status(unsigned char);
extern const char *scsi_sense_key_string(unsigned char);
extern const char *scsi_extd_sense_format(unsigned char, unsigned char);
#endif /* _SCSI_SCSI_DBG_H */

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#ifndef _SCSI_SCSI_DEVICE_H
#define _SCSI_SCSI_DEVICE_H
#include <linux/device.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <asm/atomic.h>
struct request_queue;
struct scsi_cmnd;
struct scsi_lun;
struct scsi_sense_hdr;
struct scsi_mode_data {
__u32 length;
__u16 block_descriptor_length;
__u8 medium_type;
__u8 device_specific;
__u8 header_length;
__u8 longlba:1;
};
/*
* sdev state: If you alter this, you also need to alter scsi_sysfs.c
* (for the ascii descriptions) and the state model enforcer:
* scsi_lib:scsi_device_set_state().
*/
enum scsi_device_state {
SDEV_CREATED = 1, /* device created but not added to sysfs
* Only internal commands allowed (for inq) */
SDEV_RUNNING, /* device properly configured
* All commands allowed */
SDEV_CANCEL, /* beginning to delete device
* Only error handler commands allowed */
SDEV_DEL, /* device deleted
* no commands allowed */
SDEV_QUIESCE, /* Device quiescent. No block commands
* will be accepted, only specials (which
* originate in the mid-layer) */
SDEV_OFFLINE, /* Device offlined (by error handling or
* user request */
SDEV_BLOCK, /* Device blocked by scsi lld. No scsi
* commands from user or midlayer should be issued
* to the scsi lld. */
};
struct scsi_device {
struct Scsi_Host *host;
struct request_queue *request_queue;
/* the next two are protected by the host->host_lock */
struct list_head siblings; /* list of all devices on this host */
struct list_head same_target_siblings; /* just the devices sharing same target id */
/* this is now protected by the request_queue->queue_lock */
unsigned int device_busy; /* commands actually active on
* low-level. protected by queue_lock. */
spinlock_t list_lock;
struct list_head cmd_list; /* queue of in use SCSI Command structures */
struct list_head starved_entry;
struct scsi_cmnd *current_cmnd; /* currently active command */
unsigned short queue_depth; /* How deep of a queue we want */
unsigned short last_queue_full_depth; /* These two are used by */
unsigned short last_queue_full_count; /* scsi_track_queue_full() */
unsigned long last_queue_full_time;/* don't let QUEUE_FULLs on the same
jiffie count on our counter, they
could all be from the same event. */
unsigned int id, lun, channel;
unsigned int manufacturer; /* Manufacturer of device, for using
* vendor-specific cmd's */
unsigned sector_size; /* size in bytes */
void *hostdata; /* available to low-level driver */
char type;
char scsi_level;
char inq_periph_qual; /* PQ from INQUIRY data */
unsigned char inquiry_len; /* valid bytes in 'inquiry' */
unsigned char * inquiry; /* INQUIRY response data */
const char * vendor; /* [back_compat] point into 'inquiry' ... */
const char * model; /* ... after scan; point to static string */
const char * rev; /* ... "nullnullnullnull" before scan */
unsigned char current_tag; /* current tag */
struct scsi_target *sdev_target; /* used only for single_lun */
unsigned int sdev_bflags; /* black/white flags as also found in
* scsi_devinfo.[hc]. For now used only to
* pass settings from slave_alloc to scsi
* core. */
unsigned writeable:1;
unsigned removable:1;
unsigned changed:1; /* Data invalid due to media change */
unsigned busy:1; /* Used to prevent races */
unsigned lockable:1; /* Able to prevent media removal */
unsigned locked:1; /* Media removal disabled */
unsigned borken:1; /* Tell the Seagate driver to be
* painfully slow on this device */
unsigned disconnect:1; /* can disconnect */
unsigned soft_reset:1; /* Uses soft reset option */
unsigned sdtr:1; /* Device supports SDTR messages */
unsigned wdtr:1; /* Device supports WDTR messages */
unsigned ppr:1; /* Device supports PPR messages */
unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */
unsigned simple_tags:1; /* simple queue tag messages are enabled */
unsigned ordered_tags:1;/* ordered queue tag messages are enabled */
unsigned single_lun:1; /* Indicates we should only allow I/O to
* one of the luns for the device at a
* time. */
unsigned was_reset:1; /* There was a bus reset on the bus for
* this device */
unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
* because we did a bus reset. */
unsigned use_10_for_rw:1; /* first try 10-byte read / write */
unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */
unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */
unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
unsigned no_start_on_add:1; /* do not issue start on add */
unsigned allow_restart:1; /* issue START_UNIT in error handler */
unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
unsigned select_no_atn:1;
unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */
unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */
unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */
unsigned int device_blocked; /* Device returned QUEUE_FULL. */
unsigned int max_device_blocked; /* what device_blocked counts down from */
#define SCSI_DEFAULT_DEVICE_BLOCKED 3
atomic_t iorequest_cnt;
atomic_t iodone_cnt;
atomic_t ioerr_cnt;
int timeout;
struct device sdev_gendev;
struct class_device sdev_classdev;
struct execute_work ew; /* used to get process context on put */
enum scsi_device_state sdev_state;
unsigned long sdev_data[0];
} __attribute__((aligned(sizeof(unsigned long))));
#define to_scsi_device(d) \
container_of(d, struct scsi_device, sdev_gendev)
#define class_to_sdev(d) \
container_of(d, struct scsi_device, sdev_classdev)
#define transport_class_to_sdev(class_dev) \
to_scsi_device(class_dev->dev)
#define sdev_printk(prefix, sdev, fmt, a...) \
dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
#define scmd_printk(prefix, scmd, fmt, a...) \
dev_printk(prefix, &(scmd)->device->sdev_gendev, fmt, ##a)
enum scsi_target_state {
STARGET_RUNNING = 1,
STARGET_DEL,
};
/*
* scsi_target: representation of a scsi target, for now, this is only
* used for single_lun devices. If no one has active IO to the target,
* starget_sdev_user is NULL, else it points to the active sdev.
*/
struct scsi_target {
struct scsi_device *starget_sdev_user;
struct list_head siblings;
struct list_head devices;
struct device dev;
unsigned int reap_ref; /* protected by the host lock */
unsigned int channel;
unsigned int id; /* target id ... replace
* scsi_device.id eventually */
unsigned int create:1; /* signal that it needs to be added */
unsigned int pdt_1f_for_no_lun; /* PDT = 0x1f */
/* means no lun present */
char scsi_level;
struct execute_work ew;
enum scsi_target_state state;
void *hostdata; /* available to low-level driver */
unsigned long starget_data[0]; /* for the transport */
/* starget_data must be the last element!!!! */
} __attribute__((aligned(sizeof(unsigned long))));
#define to_scsi_target(d) container_of(d, struct scsi_target, dev)
static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
{
return to_scsi_target(sdev->sdev_gendev.parent);
}
#define transport_class_to_starget(class_dev) \
to_scsi_target(class_dev->dev)
#define starget_printk(prefix, starget, fmt, a...) \
dev_printk(prefix, &(starget)->dev, fmt, ##a)
extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
uint, uint, uint, void *hostdata);
extern int scsi_add_device(struct Scsi_Host *host, uint channel,
uint target, uint lun);
extern void scsi_remove_device(struct scsi_device *);
extern int scsi_device_cancel(struct scsi_device *, int);
extern int scsi_device_get(struct scsi_device *);
extern void scsi_device_put(struct scsi_device *);
extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
uint, uint, uint);
extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
uint, uint, uint);
extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
uint);
extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
uint);
extern void starget_for_each_device(struct scsi_target *, void *,
void (*fn)(struct scsi_device *, void *));
/* only exposed to implement shost_for_each_device */
extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
struct scsi_device *);
/**
* shost_for_each_device - iterate over all devices of a host
* @sdev: the &struct scsi_device to use as a cursor
* @shost: the &struct scsi_host to iterate over
*
* Iterator that returns each device attached to @shost. This loop
* takes a reference on each device and releases it at the end. If
* you break out of the loop, you must call scsi_device_put(sdev).
*/
#define shost_for_each_device(sdev, shost) \
for ((sdev) = __scsi_iterate_devices((shost), NULL); \
(sdev); \
(sdev) = __scsi_iterate_devices((shost), (sdev)))
/**
* __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
* @sdev: the &struct scsi_device to use as a cursor
* @shost: the &struct scsi_host to iterate over
*
* Iterator that returns each device attached to @shost. It does _not_
* take a reference on the scsi_device, so the whole loop must be
* protected by shost->host_lock.
*
* Note: The only reason to use this is because you need to access the
* device list in interrupt context. Otherwise you really want to use
* shost_for_each_device instead.
*/
#define __shost_for_each_device(sdev, shost) \
list_for_each_entry((sdev), &((shost)->__devices), siblings)
extern void scsi_adjust_queue_depth(struct scsi_device *, int, int);
extern int scsi_track_queue_full(struct scsi_device *, int);
extern int scsi_set_medium_removal(struct scsi_device *, char);
extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
unsigned char *buffer, int len, int timeout,
int retries, struct scsi_mode_data *data,
struct scsi_sense_hdr *);
extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
int modepage, unsigned char *buffer, int len,
int timeout, int retries,
struct scsi_mode_data *data,
struct scsi_sense_hdr *);
extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
int retries);
extern int scsi_device_set_state(struct scsi_device *sdev,
enum scsi_device_state state);
extern int scsi_device_quiesce(struct scsi_device *sdev);
extern void scsi_device_resume(struct scsi_device *sdev);
extern void scsi_target_quiesce(struct scsi_target *);
extern void scsi_target_resume(struct scsi_target *);
extern void scsi_scan_target(struct device *parent, unsigned int channel,
unsigned int id, unsigned int lun, int rescan);
extern void scsi_target_reap(struct scsi_target *);
extern void scsi_target_block(struct device *);
extern void scsi_target_unblock(struct device *);
extern void scsi_remove_target(struct device *);
extern void int_to_scsilun(unsigned int, struct scsi_lun *);
extern const char *scsi_device_state_name(enum scsi_device_state);
extern int scsi_is_sdev_device(const struct device *);
extern int scsi_is_target_device(const struct device *);
extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
unsigned char *sense, int timeout, int retries,
int flag);
extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
struct scsi_sense_hdr *, int timeout, int retries);
extern int scsi_execute_async(struct scsi_device *sdev,
const unsigned char *cmd, int cmd_len, int data_direction,
void *buffer, unsigned bufflen, int use_sg,
int timeout, int retries, void *privdata,
void (*done)(void *, char *, int, int),
gfp_t gfp);
static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
{
return device_reprobe(&sdev->sdev_gendev);
}
static inline unsigned int sdev_channel(struct scsi_device *sdev)
{
return sdev->channel;
}
static inline unsigned int sdev_id(struct scsi_device *sdev)
{
return sdev->id;
}
#define scmd_id(scmd) sdev_id((scmd)->device)
#define scmd_channel(scmd) sdev_channel((scmd)->device)
static inline int scsi_device_online(struct scsi_device *sdev)
{
return sdev->sdev_state != SDEV_OFFLINE;
}
/* accessor functions for the SCSI parameters */
static inline int scsi_device_sync(struct scsi_device *sdev)
{
return sdev->sdtr;
}
static inline int scsi_device_wide(struct scsi_device *sdev)
{
return sdev->wdtr;
}
static inline int scsi_device_dt(struct scsi_device *sdev)
{
return sdev->ppr;
}
static inline int scsi_device_dt_only(struct scsi_device *sdev)
{
if (sdev->inquiry_len < 57)
return 0;
return (sdev->inquiry[56] & 0x0c) == 0x04;
}
static inline int scsi_device_ius(struct scsi_device *sdev)
{
if (sdev->inquiry_len < 57)
return 0;
return sdev->inquiry[56] & 0x01;
}
static inline int scsi_device_qas(struct scsi_device *sdev)
{
if (sdev->inquiry_len < 57)
return 0;
return sdev->inquiry[56] & 0x02;
}
#endif /* _SCSI_SCSI_DEVICE_H */

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#ifndef _SCSI_SCSI_DEVINFO_H
#define _SCSI_SCSI_DEVINFO_H
/*
* Flags for SCSI devices that need special treatment
*/
#define BLIST_NOLUN 0x001 /* Only scan LUN 0 */
#define BLIST_FORCELUN 0x002 /* Known to have LUNs, force scanning,
deprecated: Use max_luns=N */
#define BLIST_BORKEN 0x004 /* Flag for broken handshaking */
#define BLIST_KEY 0x008 /* unlock by special command */
#define BLIST_SINGLELUN 0x010 /* Do not use LUNs in parallel */
#define BLIST_NOTQ 0x020 /* Buggy Tagged Command Queuing */
#define BLIST_SPARSELUN 0x040 /* Non consecutive LUN numbering */
#define BLIST_MAX5LUN 0x080 /* Avoid LUNS >= 5 */
#define BLIST_ISROM 0x100 /* Treat as (removable) CD-ROM */
#define BLIST_LARGELUN 0x200 /* LUNs past 7 on a SCSI-2 device */
#define BLIST_INQUIRY_36 0x400 /* override additional length field */
#define BLIST_INQUIRY_58 0x800 /* ... for broken inquiry responses */
#define BLIST_NOSTARTONADD 0x1000 /* do not do automatic start on add */
#define BLIST_MS_SKIP_PAGE_08 0x2000 /* do not send ms page 0x08 */
#define BLIST_MS_SKIP_PAGE_3F 0x4000 /* do not send ms page 0x3f */
#define BLIST_USE_10_BYTE_MS 0x8000 /* use 10 byte ms before 6 byte ms */
#define BLIST_MS_192_BYTES_FOR_3F 0x10000 /* 192 byte ms page 0x3f request */
#define BLIST_REPORTLUN2 0x20000 /* try REPORT_LUNS even for SCSI-2 devs
(if HBA supports more than 8 LUNs) */
#define BLIST_NOREPORTLUN 0x40000 /* don't try REPORT_LUNS scan (SCSI-3 devs) */
#define BLIST_NOT_LOCKABLE 0x80000 /* don't use PREVENT-ALLOW commands */
#define BLIST_NO_ULD_ATTACH 0x100000 /* device is actually for RAID config */
#define BLIST_SELECT_NO_ATN 0x200000 /* select without ATN */
#define BLIST_RETRY_HWERROR 0x400000 /* retry HARDWARE_ERROR */
#define BLIST_MAX_512 0x800000 /* maximum 512 sector cdb length */
#define BLIST_ATTACH_PQ3 0x1000000 /* Scan: Attach to PQ3 devices */
#endif

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#ifndef _SCSI_SCSI_DRIVER_H
#define _SCSI_SCSI_DRIVER_H
#include <linux/device.h>
struct module;
struct scsi_cmnd;
struct scsi_driver {
struct module *owner;
struct device_driver gendrv;
int (*init_command)(struct scsi_cmnd *);
void (*rescan)(struct device *);
int (*issue_flush)(struct device *, sector_t *);
int (*prepare_flush)(struct request_queue *, struct request *);
};
#define to_scsi_driver(drv) \
container_of((drv), struct scsi_driver, gendrv)
extern int scsi_register_driver(struct device_driver *);
#define scsi_unregister_driver(drv) \
driver_unregister(drv);
extern int scsi_register_interface(struct class_interface *);
#define scsi_unregister_interface(intf) \
class_interface_unregister(intf)
#endif /* _SCSI_SCSI_DRIVER_H */

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#ifndef _SCSI_SCSI_EH_H
#define _SCSI_SCSI_EH_H
struct scsi_cmnd;
struct scsi_device;
struct Scsi_Host;
/*
* This is a slightly modified SCSI sense "descriptor" format header.
* The addition is to allow the 0x70 and 0x71 response codes. The idea
* is to place the salient data from either "fixed" or "descriptor" sense
* format into one structure to ease application processing.
*
* The original sense buffer should be kept around for those cases
* in which more information is required (e.g. the LBA of a MEDIUM ERROR).
*/
struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
u8 sense_key;
u8 asc;
u8 ascq;
u8 byte4;
u8 byte5;
u8 byte6;
u8 additional_length; /* always 0 for fixed sense format */
};
static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
{
if (!sshdr)
return 0;
return (sshdr->response_code & 0x70) == 0x70;
}
extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
struct list_head *done_q);
extern void scsi_eh_flush_done_q(struct list_head *done_q);
extern void scsi_report_bus_reset(struct Scsi_Host *, int);
extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
extern int scsi_block_when_processing_errors(struct scsi_device *);
extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
struct scsi_sense_hdr *sshdr);
extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
struct scsi_sense_hdr *sshdr);
static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr)
{
return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
}
extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
int desc_type);
extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
u64 * info_out);
/*
* Reset request from external source
*/
#define SCSI_TRY_RESET_DEVICE 1
#define SCSI_TRY_RESET_BUS 2
#define SCSI_TRY_RESET_HOST 3
extern int scsi_reset_provider(struct scsi_device *, int);
#endif /* _SCSI_SCSI_EH_H */

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#ifndef _SCSI_SCSI_HOST_H
#define _SCSI_SCSI_HOST_H
#include <linux/device.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
struct request_queue;
struct block_device;
struct completion;
struct module;
struct scsi_cmnd;
struct scsi_device;
struct scsi_target;
struct Scsi_Host;
struct scsi_host_cmd_pool;
struct scsi_transport_template;
struct blk_queue_tags;
/*
* The various choices mean:
* NONE: Self evident. Host adapter is not capable of scatter-gather.
* ALL: Means that the host adapter module can do scatter-gather,
* and that there is no limit to the size of the table to which
* we scatter/gather data.
* Anything else: Indicates the maximum number of chains that can be
* used in one scatter-gather request.
*/
#define SG_NONE 0
#define SG_ALL 0xff
#define DISABLE_CLUSTERING 0
#define ENABLE_CLUSTERING 1
enum scsi_eh_timer_return {
EH_NOT_HANDLED,
EH_HANDLED,
EH_RESET_TIMER,
};
struct scsi_host_template {
struct module *module;
const char *name;
/*
* Used to initialize old-style drivers. For new-style drivers
* just perform all work in your module initialization function.
*
* Status: OBSOLETE
*/
int (* detect)(struct scsi_host_template *);
/*
* Used as unload callback for hosts with old-style drivers.
*
* Status: OBSOLETE
*/
int (* release)(struct Scsi_Host *);
/*
* The info function will return whatever useful information the
* developer sees fit. If not provided, then the name field will
* be used instead.
*
* Status: OPTIONAL
*/
const char *(* info)(struct Scsi_Host *);
/*
* Ioctl interface
*
* Status: OPTIONAL
*/
int (* ioctl)(struct scsi_device *dev, int cmd, void __user *arg);
#ifdef CONFIG_COMPAT
/*
* Compat handler. Handle 32bit ABI.
* When unknown ioctl is passed return -ENOIOCTLCMD.
*
* Status: OPTIONAL
*/
int (* compat_ioctl)(struct scsi_device *dev, int cmd, void __user *arg);
#endif
/*
* The queuecommand function is used to queue up a scsi
* command block to the LLDD. When the driver finished
* processing the command the done callback is invoked.
*
* If queuecommand returns 0, then the HBA has accepted the
* command. The done() function must be called on the command
* when the driver has finished with it. (you may call done on the
* command before queuecommand returns, but in this case you
* *must* return 0 from queuecommand).
*
* Queuecommand may also reject the command, in which case it may
* not touch the command and must not call done() for it.
*
* There are two possible rejection returns:
*
* SCSI_MLQUEUE_DEVICE_BUSY: Block this device temporarily, but
* allow commands to other devices serviced by this host.
*
* SCSI_MLQUEUE_HOST_BUSY: Block all devices served by this
* host temporarily.
*
* For compatibility, any other non-zero return is treated the
* same as SCSI_MLQUEUE_HOST_BUSY.
*
* NOTE: "temporarily" means either until the next command for#
* this device/host completes, or a period of time determined by
* I/O pressure in the system if there are no other outstanding
* commands.
*
* STATUS: REQUIRED
*/
int (* queuecommand)(struct scsi_cmnd *,
void (*done)(struct scsi_cmnd *));
/*
* The transfer functions are used to queue a scsi command to
* the LLD. When the driver is finished processing the command
* the done callback is invoked.
*
* return values: see queuecommand
*
* If the LLD accepts the cmd, it should set the result to an
* appropriate value when completed before calling the done function.
*
* STATUS: REQUIRED FOR TARGET DRIVERS
*/
/* TODO: rename */
int (* transfer_response)(struct scsi_cmnd *,
void (*done)(struct scsi_cmnd *));
/*
* This is called to inform the LLD to transfer cmd->request_bufflen
* bytes of the cmd at cmd->offset in the cmd. The cmd->use_sg
* speciefies the number of scatterlist entried in the command
* and cmd->request_buffer contains the scatterlist.
*
* If the command cannot be processed in one transfer_data call
* becuase a scatterlist within the LLD's limits cannot be
* created then transfer_data will be called multiple times.
* It is initially called from process context, and later
* calls are from the interrup context.
*/
int (* transfer_data)(struct scsi_cmnd *,
void (*done)(struct scsi_cmnd *));
/* Used as callback for the completion of task management request. */
int (* tsk_mgmt_response)(u64 mid, int result);
/*
* This is an error handling strategy routine. You don't need to
* define one of these if you don't want to - there is a default
* routine that is present that should work in most cases. For those
* driver authors that have the inclination and ability to write their
* own strategy routine, this is where it is specified. Note - the
* strategy routine is *ALWAYS* run in the context of the kernel eh
* thread. Thus you are guaranteed to *NOT* be in an interrupt
* handler when you execute this, and you are also guaranteed to
* *NOT* have any other commands being queued while you are in the
* strategy routine. When you return from this function, operations
* return to normal.
*
* See scsi_error.c scsi_unjam_host for additional comments about
* what this function should and should not be attempting to do.
*
* Status: REQUIRED (at least one of them)
*/
int (* eh_abort_handler)(struct scsi_cmnd *);
int (* eh_device_reset_handler)(struct scsi_cmnd *);
int (* eh_bus_reset_handler)(struct scsi_cmnd *);
int (* eh_host_reset_handler)(struct scsi_cmnd *);
/*
* Before the mid layer attempts to scan for a new device where none
* currently exists, it will call this entry in your driver. Should
* your driver need to allocate any structs or perform any other init
* items in order to send commands to a currently unused target/lun
* combo, then this is where you can perform those allocations. This
* is specifically so that drivers won't have to perform any kind of
* "is this a new device" checks in their queuecommand routine,
* thereby making the hot path a bit quicker.
*
* Return values: 0 on success, non-0 on failure
*
* Deallocation: If we didn't find any devices at this ID, you will
* get an immediate call to slave_destroy(). If we find something
* here then you will get a call to slave_configure(), then the
* device will be used for however long it is kept around, then when
* the device is removed from the system (or * possibly at reboot
* time), you will then get a call to slave_destroy(). This is
* assuming you implement slave_configure and slave_destroy.
* However, if you allocate memory and hang it off the device struct,
* then you must implement the slave_destroy() routine at a minimum
* in order to avoid leaking memory
* each time a device is tore down.
*
* Status: OPTIONAL
*/
int (* slave_alloc)(struct scsi_device *);
/*
* Once the device has responded to an INQUIRY and we know the
* device is online, we call into the low level driver with the
* struct scsi_device *. If the low level device driver implements
* this function, it *must* perform the task of setting the queue
* depth on the device. All other tasks are optional and depend
* on what the driver supports and various implementation details.
*
* Things currently recommended to be handled at this time include:
*
* 1. Setting the device queue depth. Proper setting of this is
* described in the comments for scsi_adjust_queue_depth.
* 2. Determining if the device supports the various synchronous
* negotiation protocols. The device struct will already have
* responded to INQUIRY and the results of the standard items
* will have been shoved into the various device flag bits, eg.
* device->sdtr will be true if the device supports SDTR messages.
* 3. Allocating command structs that the device will need.
* 4. Setting the default timeout on this device (if needed).
* 5. Anything else the low level driver might want to do on a device
* specific setup basis...
* 6. Return 0 on success, non-0 on error. The device will be marked
* as offline on error so that no access will occur. If you return
* non-0, your slave_destroy routine will never get called for this
* device, so don't leave any loose memory hanging around, clean
* up after yourself before returning non-0
*
* Status: OPTIONAL
*/
int (* slave_configure)(struct scsi_device *);
/*
* Immediately prior to deallocating the device and after all activity
* has ceased the mid layer calls this point so that the low level
* driver may completely detach itself from the scsi device and vice
* versa. The low level driver is responsible for freeing any memory
* it allocated in the slave_alloc or slave_configure calls.
*
* Status: OPTIONAL
*/
void (* slave_destroy)(struct scsi_device *);
/*
* Before the mid layer attempts to scan for a new device attached
* to a target where no target currently exists, it will call this
* entry in your driver. Should your driver need to allocate any
* structs or perform any other init items in order to send commands
* to a currently unused target, then this is where you can perform
* those allocations.
*
* Return values: 0 on success, non-0 on failure
*
* Status: OPTIONAL
*/
int (* target_alloc)(struct scsi_target *);
/*
* Immediately prior to deallocating the target structure, and
* after all activity to attached scsi devices has ceased, the
* midlayer calls this point so that the driver may deallocate
* and terminate any references to the target.
*
* Status: OPTIONAL
*/
void (* target_destroy)(struct scsi_target *);
/*
* If a host has the ability to discover targets on its own instead
* of scanning the entire bus, it can fill in this function and
* call scsi_scan_host(). This function will be called periodically
* until it returns 1 with the scsi_host and the elapsed time of
* the scan in jiffies.
*
* Status: OPTIONAL
*/
int (* scan_finished)(struct Scsi_Host *, unsigned long);
/*
* If the host wants to be called before the scan starts, but
* after the midlayer has set up ready for the scan, it can fill
* in this function.
*/
void (* scan_start)(struct Scsi_Host *);
/*
* fill in this function to allow the queue depth of this host
* to be changeable (on a per device basis). returns either
* the current queue depth setting (may be different from what
* was passed in) or an error. An error should only be
* returned if the requested depth is legal but the driver was
* unable to set it. If the requested depth is illegal, the
* driver should set and return the closest legal queue depth.
*
*/
int (* change_queue_depth)(struct scsi_device *, int);
/*
* fill in this function to allow the changing of tag types
* (this also allows the enabling/disabling of tag command
* queueing). An error should only be returned if something
* went wrong in the driver while trying to set the tag type.
* If the driver doesn't support the requested tag type, then
* it should set the closest type it does support without
* returning an error. Returns the actual tag type set.
*/
int (* change_queue_type)(struct scsi_device *, int);
/*
* This function determines the bios parameters for a given
* harddisk. These tend to be numbers that are made up by
* the host adapter. Parameters:
* size, device, list (heads, sectors, cylinders)
*
* Status: OPTIONAL */
int (* bios_param)(struct scsi_device *, struct block_device *,
sector_t, int []);
/*
* Can be used to export driver statistics and other infos to the
* world outside the kernel ie. userspace and it also provides an
* interface to feed the driver with information.
*
* Status: OBSOLETE
*/
int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
/*
* suspend support
*/
int (*resume)(struct scsi_device *);
int (*suspend)(struct scsi_device *, pm_message_t state);
/*
* Name of proc directory
*/
char *proc_name;
/*
* Used to store the procfs directory if a driver implements the
* proc_info method.
*/
struct proc_dir_entry *proc_dir;
/*
* This determines if we will use a non-interrupt driven
* or an interrupt driven scheme, It is set to the maximum number
* of simultaneous commands a given host adapter will accept.
*/
int can_queue;
/*
* In many instances, especially where disconnect / reconnect are
* supported, our host also has an ID on the SCSI bus. If this is
* the case, then it must be reserved. Please set this_id to -1 if
* your setup is in single initiator mode, and the host lacks an
* ID.
*/
int this_id;
/*
* This determines the degree to which the host adapter is capable
* of scatter-gather.
*/
unsigned short sg_tablesize;
/*
* If the host adapter has limitations beside segment count
*/
unsigned short max_sectors;
/*
* dma scatter gather segment boundary limit. a segment crossing this
* boundary will be split in two.
*/
unsigned long dma_boundary;
/*
* This specifies "machine infinity" for host templates which don't
* limit the transfer size. Note this limit represents an absolute
* maximum, and may be over the transfer limits allowed for
* individual devices (e.g. 256 for SCSI-1)
*/
#define SCSI_DEFAULT_MAX_SECTORS 1024
/*
* True if this host adapter can make good use of linked commands.
* This will allow more than one command to be queued to a given
* unit on a given host. Set this to the maximum number of command
* blocks to be provided for each device. Set this to 1 for one
* command block per lun, 2 for two, etc. Do not set this to 0.
* You should make sure that the host adapter will do the right thing
* before you try setting this above 1.
*/
short cmd_per_lun;
/*
* present contains counter indicating how many boards of this
* type were found when we did the scan.
*/
unsigned char present;
/*
* true if this host adapter uses unchecked DMA onto an ISA bus.
*/
unsigned unchecked_isa_dma:1;
/*
* true if this host adapter can make good use of clustering.
* I originally thought that if the tablesize was large that it
* was a waste of CPU cycles to prepare a cluster list, but
* it works out that the Buslogic is faster if you use a smaller
* number of segments (i.e. use clustering). I guess it is
* inefficient.
*/
unsigned use_clustering:1;
/*
* True for emulated SCSI host adapters (e.g. ATAPI)
*/
unsigned emulated:1;
/*
* True if the low-level driver performs its own reset-settle delays.
*/
unsigned skip_settle_delay:1;
/*
* ordered write support
*/
unsigned ordered_tag:1;
/*
* Countdown for host blocking with no commands outstanding
*/
unsigned int max_host_blocked;
/*
* Default value for the blocking. If the queue is empty,
* host_blocked counts down in the request_fn until it restarts
* host operations as zero is reached.
*
* FIXME: This should probably be a value in the template
*/
#define SCSI_DEFAULT_HOST_BLOCKED 7
/*
* Pointer to the sysfs class properties for this host, NULL terminated.
*/
struct class_device_attribute **shost_attrs;
/*
* Pointer to the SCSI device properties for this host, NULL terminated.
*/
struct device_attribute **sdev_attrs;
/*
* List of hosts per template.
*
* This is only for use by scsi_module.c for legacy templates.
* For these access to it is synchronized implicitly by
* module_init/module_exit.
*/
struct list_head legacy_hosts;
};
/*
* shost state: If you alter this, you also need to alter scsi_sysfs.c
* (for the ascii descriptions) and the state model enforcer:
* scsi_host_set_state()
*/
enum scsi_host_state {
SHOST_CREATED = 1,
SHOST_RUNNING,
SHOST_CANCEL,
SHOST_DEL,
SHOST_RECOVERY,
SHOST_CANCEL_RECOVERY,
SHOST_DEL_RECOVERY,
};
struct Scsi_Host {
/*
* __devices is protected by the host_lock, but you should
* usually use scsi_device_lookup / shost_for_each_device
* to access it and don't care about locking yourself.
* In the rare case of beeing in irq context you can use
* their __ prefixed variants with the lock held. NEVER
* access this list directly from a driver.
*/
struct list_head __devices;
struct list_head __targets;
struct scsi_host_cmd_pool *cmd_pool;
spinlock_t free_list_lock;
struct list_head free_list; /* backup store of cmd structs */
struct list_head starved_list;
spinlock_t default_lock;
spinlock_t *host_lock;
struct mutex scan_mutex;/* serialize scanning activity */
struct list_head eh_cmd_q;
struct task_struct * ehandler; /* Error recovery thread. */
struct completion * eh_action; /* Wait for specific actions on the
host. */
wait_queue_head_t host_wait;
struct scsi_host_template *hostt;
struct scsi_transport_template *transportt;
/*
* area to keep a shared tag map (if needed, will be
* NULL if not)
*/
struct blk_queue_tag *bqt;
/*
* The following two fields are protected with host_lock;
* however, eh routines can safely access during eh processing
* without acquiring the lock.
*/
unsigned int host_busy; /* commands actually active on low-level */
unsigned int host_failed; /* commands that failed. */
unsigned int host_eh_scheduled; /* EH scheduled without command */
unsigned short host_no; /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */
int resetting; /* if set, it means that last_reset is a valid value */
unsigned long last_reset;
/*
* These three parameters can be used to allow for wide scsi,
* and for host adapters that support multiple busses
* The first two should be set to 1 more than the actual max id
* or lun (i.e. 8 for normal systems).
*/
unsigned int max_id;
unsigned int max_lun;
unsigned int max_channel;
/*
* This is a unique identifier that must be assigned so that we
* have some way of identifying each detected host adapter properly
* and uniquely. For hosts that do not support more than one card
* in the system at one time, this does not need to be set. It is
* initialized to 0 in scsi_register.
*/
unsigned int unique_id;
/*
* The maximum length of SCSI commands that this host can accept.
* Probably 12 for most host adapters, but could be 16 for others.
* For drivers that don't set this field, a value of 12 is
* assumed. I am leaving this as a number rather than a bit
* because you never know what subsequent SCSI standards might do
* (i.e. could there be a 20 byte or a 24-byte command a few years
* down the road?).
*/
unsigned char max_cmd_len;
int this_id;
int can_queue;
short cmd_per_lun;
short unsigned int sg_tablesize;
short unsigned int max_sectors;
unsigned long dma_boundary;
/*
* Used to assign serial numbers to the cmds.
* Protected by the host lock.
*/
unsigned long cmd_serial_number, cmd_pid;
unsigned unchecked_isa_dma:1;
unsigned use_clustering:1;
unsigned use_blk_tcq:1;
/*
* Host has requested that no further requests come through for the
* time being.
*/
unsigned host_self_blocked:1;
/*
* Host uses correct SCSI ordering not PC ordering. The bit is
* set for the minority of drivers whose authors actually read
* the spec ;)
*/
unsigned reverse_ordering:1;
/*
* ordered write support
*/
unsigned ordered_tag:1;
/* task mgmt function in progress */
unsigned tmf_in_progress:1;
/* Asynchronous scan in progress */
unsigned async_scan:1;
/*
* Optional work queue to be utilized by the transport
*/
char work_q_name[KOBJ_NAME_LEN];
struct workqueue_struct *work_q;
/*
* Host has rejected a command because it was busy.
*/
unsigned int host_blocked;
/*
* Value host_blocked counts down from
*/
unsigned int max_host_blocked;
/*
* q used for scsi_tgt msgs, async events or any other requests that
* need to be processed in userspace
*/
struct request_queue *uspace_req_q;
/* legacy crap */
unsigned long base;
unsigned long io_port;
unsigned char n_io_port;
unsigned char dma_channel;
unsigned int irq;
enum scsi_host_state shost_state;
/* ldm bits */
struct device shost_gendev;
struct class_device shost_classdev;
/*
* List of hosts per template.
*
* This is only for use by scsi_module.c for legacy templates.
* For these access to it is synchronized implicitly by
* module_init/module_exit.
*/
struct list_head sht_legacy_list;
/*
* Points to the transport data (if any) which is allocated
* separately
*/
void *shost_data;
/*
* We should ensure that this is aligned, both for better performance
* and also because some compilers (m68k) don't automatically force
* alignment to a long boundary.
*/
unsigned long hostdata[0] /* Used for storage of host specific stuff */
__attribute__ ((aligned (sizeof(unsigned long))));
};
#define class_to_shost(d) \
container_of(d, struct Scsi_Host, shost_classdev)
#define shost_printk(prefix, shost, fmt, a...) \
dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
int scsi_is_host_device(const struct device *);
static inline struct Scsi_Host *dev_to_shost(struct device *dev)
{
while (!scsi_is_host_device(dev)) {
if (!dev->parent)
return NULL;
dev = dev->parent;
}
return container_of(dev, struct Scsi_Host, shost_gendev);
}
static inline int scsi_host_in_recovery(struct Scsi_Host *shost)
{
return shost->shost_state == SHOST_RECOVERY ||
shost->shost_state == SHOST_CANCEL_RECOVERY ||
shost->shost_state == SHOST_DEL_RECOVERY ||
shost->tmf_in_progress;
}
extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *);
extern void scsi_flush_work(struct Scsi_Host *);
extern struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *, int);
extern int __must_check scsi_add_host(struct Scsi_Host *, struct device *);
extern void scsi_scan_host(struct Scsi_Host *);
extern void scsi_rescan_device(struct device *);
extern void scsi_remove_host(struct Scsi_Host *);
extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
extern void scsi_host_put(struct Scsi_Host *t);
extern struct Scsi_Host *scsi_host_lookup(unsigned short);
extern const char *scsi_host_state_name(enum scsi_host_state);
extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
static inline struct device *scsi_get_device(struct Scsi_Host *shost)
{
return shost->shost_gendev.parent;
}
/**
* scsi_host_scan_allowed - Is scanning of this host allowed
* @shost: Pointer to Scsi_Host.
**/
static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
{
return shost->shost_state == SHOST_RUNNING;
}
extern void scsi_unblock_requests(struct Scsi_Host *);
extern void scsi_block_requests(struct Scsi_Host *);
struct class_container;
extern struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost,
void (*) (struct request_queue *));
/*
* These two functions are used to allocate and free a pseudo device
* which will connect to the host adapter itself rather than any
* physical device. You must deallocate when you are done with the
* thing. This physical pseudo-device isn't real and won't be available
* from any high-level drivers.
*/
extern void scsi_free_host_dev(struct scsi_device *);
extern struct scsi_device *scsi_get_host_dev(struct Scsi_Host *);
/* legacy interfaces */
extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int);
extern void scsi_unregister(struct Scsi_Host *);
extern int scsi_host_set_state(struct Scsi_Host *, enum scsi_host_state);
#endif /* _SCSI_SCSI_HOST_H */

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#ifndef _SCSI_IOCTL_H
#define _SCSI_IOCTL_H
#define SCSI_IOCTL_SEND_COMMAND 1
#define SCSI_IOCTL_TEST_UNIT_READY 2
#define SCSI_IOCTL_BENCHMARK_COMMAND 3
#define SCSI_IOCTL_SYNC 4 /* Request synchronous parameters */
#define SCSI_IOCTL_START_UNIT 5
#define SCSI_IOCTL_STOP_UNIT 6
/* The door lock/unlock constants are compatible with Sun constants for
the cdrom */
#define SCSI_IOCTL_DOORLOCK 0x5380 /* lock the eject mechanism */
#define SCSI_IOCTL_DOORUNLOCK 0x5381 /* unlock the mechanism */
#define SCSI_REMOVAL_PREVENT 1
#define SCSI_REMOVAL_ALLOW 0
#ifdef __KERNEL__
struct scsi_device;
/*
* Structures used for scsi_ioctl et al.
*/
typedef struct scsi_ioctl_command {
unsigned int inlen;
unsigned int outlen;
unsigned char data[0];
} Scsi_Ioctl_Command;
typedef struct scsi_idlun {
__u32 dev_id;
__u32 host_unique_id;
} Scsi_Idlun;
/* Fibre Channel WWN, port_id struct */
typedef struct scsi_fctargaddress {
__u32 host_port_id;
unsigned char host_wwn[8]; // include NULL term.
} Scsi_FCTargAddress;
extern int scsi_ioctl(struct scsi_device *, int, void __user *);
extern int scsi_nonblockable_ioctl(struct scsi_device *sdev, int cmd,
void __user *arg, struct file *filp);
#endif /* __KERNEL__ */
#endif /* _SCSI_IOCTL_H */

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/*
* SCSI Transport Netlink Interface
* Used for the posting of outbound SCSI transport events
*
* Copyright (C) 2006 James Smart, Emulex Corporation
*
* 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 SCSI_NETLINK_H
#define SCSI_NETLINK_H
/*
* This file intended to be included by both kernel and user space
*/
/* Single Netlink Message type to send all SCSI Transport messages */
#define SCSI_TRANSPORT_MSG NLMSG_MIN_TYPE + 1
/* SCSI Transport Broadcast Groups */
/* leaving groups 0 and 1 unassigned */
#define SCSI_NL_GRP_FC_EVENTS (1<<2) /* Group 2 */
#define SCSI_NL_GRP_CNT 3
/* SCSI_TRANSPORT_MSG event message header */
struct scsi_nl_hdr {
uint8_t version;
uint8_t transport;
uint16_t magic;
uint16_t msgtype;
uint16_t msglen;
} __attribute__((aligned(sizeof(uint64_t))));
/* scsi_nl_hdr->version value */
#define SCSI_NL_VERSION 1
/* scsi_nl_hdr->magic value */
#define SCSI_NL_MAGIC 0xA1B2
/* scsi_nl_hdr->transport value */
#define SCSI_NL_TRANSPORT 0
#define SCSI_NL_TRANSPORT_FC 1
#define SCSI_NL_MAX_TRANSPORTS 2
/* scsi_nl_hdr->msgtype values are defined in each transport */
/*
* Vendor ID:
* If transports post vendor-unique events, they must pass a well-known
* 32-bit vendor identifier. This identifier consists of 8 bits indicating
* the "type" of identifier contained, and 24 bits of id data.
*
* Identifiers for each type:
* PCI : ID data is the 16 bit PCI Registered Vendor ID
*/
#define SCSI_NL_VID_TYPE_SHIFT 56
#define SCSI_NL_VID_TYPE_MASK ((u64)0xFF << SCSI_NL_VID_TYPE_SHIFT)
#define SCSI_NL_VID_TYPE_PCI ((u64)0x01 << SCSI_NL_VID_TYPE_SHIFT)
#define SCSI_NL_VID_ID_MASK (~ SCSI_NL_VID_TYPE_MASK)
#define INIT_SCSI_NL_HDR(hdr, t, mtype, mlen) \
{ \
(hdr)->version = SCSI_NL_VERSION; \
(hdr)->transport = t; \
(hdr)->magic = SCSI_NL_MAGIC; \
(hdr)->msgtype = mtype; \
(hdr)->msglen = mlen; \
}
#endif /* SCSI_NETLINK_H */

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/*
* FC Transport Netlink Interface
*
* Copyright (C) 2006 James Smart, Emulex Corporation
*
* 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 SCSI_NETLINK_FC_H
#define SCSI_NETLINK_FC_H
#include <scsi/scsi_netlink.h>
/*
* This file intended to be included by both kernel and user space
*/
/*
* FC Transport Message Types
*/
/* kernel -> user */
#define FC_NL_ASYNC_EVENT 0x0100
/* user -> kernel */
/* none */
/*
* Message Structures :
*/
/* macro to round up message lengths to 8byte boundary */
#define FC_NL_MSGALIGN(len) (((len) + 7) & ~7)
/*
* FC Transport Broadcast Event Message :
* FC_NL_ASYNC_EVENT
*
* Note: if Vendor Unique message, &event_data will be start of
* vendor unique payload, and the length of the payload is
* per event_datalen
*
* Note: When specifying vendor_id, be sure to read the Vendor Type and ID
* formatting requirements specified in scsi_netlink.h
*/
struct fc_nl_event {
struct scsi_nl_hdr snlh; /* must be 1st element ! */
uint64_t seconds;
uint64_t vendor_id;
uint16_t host_no;
uint16_t event_datalen;
uint32_t event_num;
uint32_t event_code;
uint32_t event_data;
} __attribute__((aligned(sizeof(uint64_t))));
#endif /* SCSI_NETLINK_FC_H */

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#ifndef _SCSI_SCSI_TCQ_H
#define _SCSI_SCSI_TCQ_H
#include <linux/blkdev.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#define MSG_SIMPLE_TAG 0x20
#define MSG_HEAD_TAG 0x21
#define MSG_ORDERED_TAG 0x22
#define SCSI_NO_TAG (-1) /* identify no tag in use */
#ifdef CONFIG_BLOCK
/**
* scsi_get_tag_type - get the type of tag the device supports
* @sdev: the scsi device
*
* Notes:
* If the drive only supports simple tags, returns MSG_SIMPLE_TAG
* if it supports all tag types, returns MSG_ORDERED_TAG.
*/
static inline int scsi_get_tag_type(struct scsi_device *sdev)
{
if (!sdev->tagged_supported)
return 0;
if (sdev->ordered_tags)
return MSG_ORDERED_TAG;
if (sdev->simple_tags)
return MSG_SIMPLE_TAG;
return 0;
}
static inline void scsi_set_tag_type(struct scsi_device *sdev, int tag)
{
switch (tag) {
case MSG_ORDERED_TAG:
sdev->ordered_tags = 1;
/* fall through */
case MSG_SIMPLE_TAG:
sdev->simple_tags = 1;
break;
case 0:
/* fall through */
default:
sdev->ordered_tags = 0;
sdev->simple_tags = 0;
break;
}
}
/**
* scsi_activate_tcq - turn on tag command queueing
* @SDpnt: device to turn on TCQ for
* @depth: queue depth
*
* Notes:
* Eventually, I hope depth would be the maximum depth
* the device could cope with and the real queue depth
* would be adjustable from 0 to depth.
**/
static inline void scsi_activate_tcq(struct scsi_device *sdev, int depth)
{
if (!sdev->tagged_supported)
return;
if (!blk_queue_tagged(sdev->request_queue))
blk_queue_init_tags(sdev->request_queue, depth,
sdev->host->bqt);
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
}
/**
* scsi_deactivate_tcq - turn off tag command queueing
* @SDpnt: device to turn off TCQ for
**/
static inline void scsi_deactivate_tcq(struct scsi_device *sdev, int depth)
{
if (blk_queue_tagged(sdev->request_queue))
blk_queue_free_tags(sdev->request_queue);
scsi_adjust_queue_depth(sdev, 0, depth);
}
/**
* scsi_populate_tag_msg - place a tag message in a buffer
* @SCpnt: pointer to the Scsi_Cmnd for the tag
* @msg: pointer to the area to place the tag
*
* Notes:
* designed to create the correct type of tag message for the
* particular request. Returns the size of the tag message.
* May return 0 if TCQ is disabled for this device.
**/
static inline int scsi_populate_tag_msg(struct scsi_cmnd *cmd, char *msg)
{
struct request *req = cmd->request;
struct scsi_device *sdev = cmd->device;
if (blk_rq_tagged(req)) {
if (sdev->ordered_tags && req->cmd_flags & REQ_HARDBARRIER)
*msg++ = MSG_ORDERED_TAG;
else
*msg++ = MSG_SIMPLE_TAG;
*msg++ = req->tag;
return 2;
}
return 0;
}
/**
* scsi_find_tag - find a tagged command by device
* @SDpnt: pointer to the ScSI device
* @tag: the tag number
*
* Notes:
* Only works with tags allocated by the generic blk layer.
**/
static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag)
{
struct request *req;
if (tag != SCSI_NO_TAG) {
req = blk_queue_find_tag(sdev->request_queue, tag);
return req ? (struct scsi_cmnd *)req->special : NULL;
}
/* single command, look in space */
return sdev->current_cmnd;
}
/**
* scsi_init_shared_tag_map - create a shared tag map
* @shost: the host to share the tag map among all devices
* @depth: the total depth of the map
*/
static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth)
{
shost->bqt = blk_init_tags(depth);
return shost->bqt ? 0 : -ENOMEM;
}
/**
* scsi_host_find_tag - find the tagged command by host
* @shost: pointer to scsi_host
* @tag: tag of the scsi_cmnd
*
* Notes:
* Only works with tags allocated by the generic blk layer.
**/
static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
int tag)
{
struct request *req;
if (tag != SCSI_NO_TAG) {
req = blk_map_queue_find_tag(shost->bqt, tag);
return req ? (struct scsi_cmnd *)req->special : NULL;
}
return NULL;
}
#endif /* CONFIG_BLOCK */
#endif /* _SCSI_SCSI_TCQ_H */

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/*
* SCSI target definitions
*/
#include <linux/dma-mapping.h>
struct Scsi_Host;
struct scsi_cmnd;
struct scsi_lun;
extern struct Scsi_Host *scsi_tgt_cmd_to_host(struct scsi_cmnd *);
extern int scsi_tgt_alloc_queue(struct Scsi_Host *);
extern void scsi_tgt_free_queue(struct Scsi_Host *);
extern int scsi_tgt_queue_command(struct scsi_cmnd *, struct scsi_lun *, u64);
extern int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *, int, u64, struct scsi_lun *,
void *);
extern struct scsi_cmnd *scsi_host_get_command(struct Scsi_Host *,
enum dma_data_direction, gfp_t);
extern void scsi_host_put_command(struct Scsi_Host *, struct scsi_cmnd *);

87
include/scsi/scsi_tgt_if.h Normal file
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/*
* SCSI target kernel/user interface
*
* Copyright (C) 2005 FUJITA Tomonori <tomof@acm.org>
* Copyright (C) 2005 Mike Christie <michaelc@cs.wisc.edu>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef __SCSI_TARGET_IF_H
#define __SCSI_TARGET_IF_H
/* user -> kernel */
#define TGT_UEVENT_CMD_RSP 0x0001
#define TGT_UEVENT_TSK_MGMT_RSP 0x0002
/* kernel -> user */
#define TGT_KEVENT_CMD_REQ 0x1001
#define TGT_KEVENT_CMD_DONE 0x1002
#define TGT_KEVENT_TSK_MGMT_REQ 0x1003
struct tgt_event_hdr {
uint16_t version;
uint16_t status;
uint16_t type;
uint16_t len;
} __attribute__ ((aligned (sizeof(uint64_t))));
struct tgt_event {
struct tgt_event_hdr hdr;
union {
/* user-> kernel */
struct {
int host_no;
uint32_t len;
int result;
aligned_u64 uaddr;
uint8_t rw;
aligned_u64 tag;
} cmd_rsp;
struct {
int host_no;
aligned_u64 mid;
int result;
} tsk_mgmt_rsp;
/* kernel -> user */
struct {
int host_no;
uint32_t data_len;
uint8_t scb[16];
uint8_t lun[8];
int attribute;
aligned_u64 tag;
} cmd_req;
struct {
int host_no;
aligned_u64 tag;
int result;
} cmd_done;
struct {
int host_no;
int function;
aligned_u64 tag;
uint8_t lun[8];
aligned_u64 mid;
} tsk_mgmt_req;
} p;
} __attribute__ ((aligned (sizeof(uint64_t))));
#define TGT_RING_SIZE (1UL << 16)
#endif

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/*
* Transport specific attributes.
*
* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
*
* 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 SCSI_TRANSPORT_H
#define SCSI_TRANSPORT_H
#include <linux/transport_class.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
struct scsi_transport_template {
/* the attribute containers */
struct transport_container host_attrs;
struct transport_container target_attrs;
struct transport_container device_attrs;
/*
* If set, called from sysfs and legacy procfs rescanning code.
*/
int (*user_scan)(struct Scsi_Host *, uint, uint, uint);
/* The size of the specific transport attribute structure (a
* space of this size will be left at the end of the
* scsi_* structure */
int device_size;
int device_private_offset;
int target_size;
int target_private_offset;
int host_size;
/* no private offset for the host; there's an alternative mechanism */
/*
* True if the transport wants to use a host-based work-queue
*/
unsigned int create_work_queue : 1;
/*
* Allows a transport to override the default error handler.
*/
void (* eh_strategy_handler)(struct Scsi_Host *);
/*
* This is an optional routine that allows the transport to become
* involved when a scsi io timer fires. The return value tells the
* timer routine how to finish the io timeout handling:
* EH_HANDLED: I fixed the error, please complete the command
* EH_RESET_TIMER: I need more time, reset the timer and
* begin counting again
* EH_NOT_HANDLED Begin normal error recovery
*/
enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *);
};
#define transport_class_to_shost(tc) \
dev_to_shost((tc)->dev)
/* Private area maintenance. The driver requested allocations come
* directly after the transport class allocations (if any). The idea
* is that you *must* call these only once. The code assumes that the
* initial values are the ones the transport specific code requires */
static inline void
scsi_transport_reserve_target(struct scsi_transport_template * t, int space)
{
BUG_ON(t->target_private_offset != 0);
t->target_private_offset = ALIGN(t->target_size, sizeof(void *));
t->target_size = t->target_private_offset + space;
}
static inline void
scsi_transport_reserve_device(struct scsi_transport_template * t, int space)
{
BUG_ON(t->device_private_offset != 0);
t->device_private_offset = ALIGN(t->device_size, sizeof(void *));
t->device_size = t->device_private_offset + space;
}
static inline void *
scsi_transport_target_data(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(&starget->dev);
return (u8 *)starget->starget_data
+ shost->transportt->target_private_offset;
}
static inline void *
scsi_transport_device_data(struct scsi_device *sdev)
{
struct Scsi_Host *shost = sdev->host;
return (u8 *)sdev->sdev_data
+ shost->transportt->device_private_offset;
}
#endif /* SCSI_TRANSPORT_H */

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include/scsi/scsi_transport_fc.h Normal file
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/*
* FiberChannel transport specific attributes exported to sysfs.
*
* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
*
* 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
*
* ========
*
* Copyright (C) 2004-2005 James Smart, Emulex Corporation
* Rewrite for host, target, device, and remote port attributes,
* statistics, and service functions...
*
*/
#ifndef SCSI_TRANSPORT_FC_H
#define SCSI_TRANSPORT_FC_H
#include <linux/sched.h>
#include <scsi/scsi.h>
#include <scsi/scsi_netlink.h>
struct scsi_transport_template;
/*
* FC Port definitions - Following FC HBAAPI guidelines
*
* Note: Not all binary values for the different fields match HBAAPI.
* Instead, we use densely packed ordinal values or enums.
* We get away with this as we never present the actual binary values
* externally. For sysfs, we always present the string that describes
* the value. Thus, an admin doesn't need a magic HBAAPI decoder ring
* to understand the values. The HBAAPI user-space library is free to
* convert the strings into the HBAAPI-specified binary values.
*
* Note: Not all HBAAPI-defined values are contained in the definitions
* below. Those not appropriate to an fc_host (e.g. FCP initiator) have
* been removed.
*/
/*
* fc_port_type: If you alter this, you also need to alter scsi_transport_fc.c
* (for the ascii descriptions).
*/
enum fc_port_type {
FC_PORTTYPE_UNKNOWN,
FC_PORTTYPE_OTHER,
FC_PORTTYPE_NOTPRESENT,
FC_PORTTYPE_NPORT, /* Attached to FPort */
FC_PORTTYPE_NLPORT, /* (Public) Loop w/ FLPort */
FC_PORTTYPE_LPORT, /* (Private) Loop w/o FLPort */
FC_PORTTYPE_PTP, /* Point to Point w/ another NPort */
};
/*
* fc_port_state: If you alter this, you also need to alter scsi_transport_fc.c
* (for the ascii descriptions).
*/
enum fc_port_state {
FC_PORTSTATE_UNKNOWN,
FC_PORTSTATE_NOTPRESENT,
FC_PORTSTATE_ONLINE,
FC_PORTSTATE_OFFLINE, /* User has taken Port Offline */
FC_PORTSTATE_BLOCKED,
FC_PORTSTATE_BYPASSED,
FC_PORTSTATE_DIAGNOSTICS,
FC_PORTSTATE_LINKDOWN,
FC_PORTSTATE_ERROR,
FC_PORTSTATE_LOOPBACK,
FC_PORTSTATE_DELETED,
};
/*
* FC Classes of Service
* Note: values are not enumerated, as they can be "or'd" together
* for reporting (e.g. report supported_classes). If you alter this list,
* you also need to alter scsi_transport_fc.c (for the ascii descriptions).
*/
#define FC_COS_UNSPECIFIED 0
#define FC_COS_CLASS1 2
#define FC_COS_CLASS2 4
#define FC_COS_CLASS3 8
#define FC_COS_CLASS4 0x10
#define FC_COS_CLASS6 0x40
/*
* FC Port Speeds
* Note: values are not enumerated, as they can be "or'd" together
* for reporting (e.g. report supported_speeds). If you alter this list,
* you also need to alter scsi_transport_fc.c (for the ascii descriptions).
*/
#define FC_PORTSPEED_UNKNOWN 0 /* Unknown - transceiver
incapable of reporting */
#define FC_PORTSPEED_1GBIT 1
#define FC_PORTSPEED_2GBIT 2
#define FC_PORTSPEED_4GBIT 4
#define FC_PORTSPEED_10GBIT 8
#define FC_PORTSPEED_NOT_NEGOTIATED (1 << 15) /* Speed not established */
/*
* fc_tgtid_binding_type: If you alter this, you also need to alter
* scsi_transport_fc.c (for the ascii descriptions).
*/
enum fc_tgtid_binding_type {
FC_TGTID_BIND_NONE,
FC_TGTID_BIND_BY_WWPN,
FC_TGTID_BIND_BY_WWNN,
FC_TGTID_BIND_BY_ID,
};
/*
* FC Remote Port Roles
* Note: values are not enumerated, as they can be "or'd" together
* for reporting (e.g. report roles). If you alter this list,
* you also need to alter scsi_transport_fc.c (for the ascii descriptions).
*/
#define FC_RPORT_ROLE_UNKNOWN 0x00
#define FC_RPORT_ROLE_FCP_TARGET 0x01
#define FC_RPORT_ROLE_FCP_INITIATOR 0x02
#define FC_RPORT_ROLE_IP_PORT 0x04
/*
* fc_rport_identifiers: This set of data contains all elements
* to uniquely identify a remote FC port. The driver uses this data
* to report the existence of a remote FC port in the topology. Internally,
* the transport uses this data for attributes and to manage consistent
* target id bindings.
*/
struct fc_rport_identifiers {
u64 node_name;
u64 port_name;
u32 port_id;
u32 roles;
};
/* Macro for use in defining Remote Port attributes */
#define FC_RPORT_ATTR(_name,_mode,_show,_store) \
struct class_device_attribute class_device_attr_rport_##_name = \
__ATTR(_name,_mode,_show,_store)
/*
* FC Remote Port Attributes
*
* This structure exists for each remote FC port that a LLDD notifies
* the subsystem of. A remote FC port may or may not be a SCSI Target,
* also be a SCSI initiator, IP endpoint, etc. As such, the remote
* port is considered a separate entity, independent of "role" (such
* as scsi target).
*
* --
*
* Attributes are based on HBAAPI V2.0 definitions. Only those
* attributes that are determinable by the local port (aka Host)
* are contained.
*
* Fixed attributes are not expected to change. The driver is
* expected to set these values after successfully calling
* fc_remote_port_add(). The transport fully manages all get functions
* w/o driver interaction.
*
* Dynamic attributes are expected to change. The driver participates
* in all get/set operations via functions provided by the driver.
*
* Private attributes are transport-managed values. They are fully
* managed by the transport w/o driver interaction.
*/
struct fc_rport { /* aka fc_starget_attrs */
/* Fixed Attributes */
u32 maxframe_size;
u32 supported_classes;
/* Dynamic Attributes */
u32 dev_loss_tmo; /* Remote Port loss timeout in seconds. */
/* Private (Transport-managed) Attributes */
u64 node_name;
u64 port_name;
u32 port_id;
u32 roles;
enum fc_port_state port_state; /* Will only be ONLINE or UNKNOWN */
u32 scsi_target_id;
u32 fast_io_fail_tmo;
/* exported data */
void *dd_data; /* Used for driver-specific storage */
/* internal data */
unsigned int channel;
u32 number;
u8 flags;
struct list_head peers;
struct device dev;
struct delayed_work dev_loss_work;
struct work_struct scan_work;
struct delayed_work fail_io_work;
struct work_struct stgt_delete_work;
struct work_struct rport_delete_work;
} __attribute__((aligned(sizeof(unsigned long))));
/* bit field values for struct fc_rport "flags" field: */
#define FC_RPORT_DEVLOSS_PENDING 0x01
#define FC_RPORT_SCAN_PENDING 0x02
#define dev_to_rport(d) \
container_of(d, struct fc_rport, dev)
#define transport_class_to_rport(classdev) \
dev_to_rport(classdev->dev)
#define rport_to_shost(r) \
dev_to_shost(r->dev.parent)
/*
* FC SCSI Target Attributes
*
* The SCSI Target is considered an extention of a remote port (as
* a remote port can be more than a SCSI Target). Within the scsi
* subsystem, we leave the Target as a separate entity. Doing so
* provides backward compatibility with prior FC transport api's,
* and lets remote ports be handled entirely within the FC transport
* and independently from the scsi subsystem. The drawback is that
* some data will be duplicated.
*/
struct fc_starget_attrs { /* aka fc_target_attrs */
/* Dynamic Attributes */
u64 node_name;
u64 port_name;
u32 port_id;
};
#define fc_starget_node_name(x) \
(((struct fc_starget_attrs *)&(x)->starget_data)->node_name)
#define fc_starget_port_name(x) \
(((struct fc_starget_attrs *)&(x)->starget_data)->port_name)
#define fc_starget_port_id(x) \
(((struct fc_starget_attrs *)&(x)->starget_data)->port_id)
#define starget_to_rport(s) \
scsi_is_fc_rport(s->dev.parent) ? dev_to_rport(s->dev.parent) : NULL
/*
* FC Local Port (Host) Statistics
*/
/* FC Statistics - Following FC HBAAPI v2.0 guidelines */
struct fc_host_statistics {
/* port statistics */
u64 seconds_since_last_reset;
u64 tx_frames;
u64 tx_words;
u64 rx_frames;
u64 rx_words;
u64 lip_count;
u64 nos_count;
u64 error_frames;
u64 dumped_frames;
u64 link_failure_count;
u64 loss_of_sync_count;
u64 loss_of_signal_count;
u64 prim_seq_protocol_err_count;
u64 invalid_tx_word_count;
u64 invalid_crc_count;
/* fc4 statistics (only FCP supported currently) */
u64 fcp_input_requests;
u64 fcp_output_requests;
u64 fcp_control_requests;
u64 fcp_input_megabytes;
u64 fcp_output_megabytes;
};
/*
* FC Event Codes - Polled and Async, following FC HBAAPI v2.0 guidelines
*/
/*
* fc_host_event_code: If you alter this, you also need to alter
* scsi_transport_fc.c (for the ascii descriptions).
*/
enum fc_host_event_code {
FCH_EVT_LIP = 0x1,
FCH_EVT_LINKUP = 0x2,
FCH_EVT_LINKDOWN = 0x3,
FCH_EVT_LIPRESET = 0x4,
FCH_EVT_RSCN = 0x5,
FCH_EVT_ADAPTER_CHANGE = 0x103,
FCH_EVT_PORT_UNKNOWN = 0x200,
FCH_EVT_PORT_OFFLINE = 0x201,
FCH_EVT_PORT_ONLINE = 0x202,
FCH_EVT_PORT_FABRIC = 0x204,
FCH_EVT_LINK_UNKNOWN = 0x500,
FCH_EVT_VENDOR_UNIQUE = 0xffff,
};
/*
* FC Local Port (Host) Attributes
*
* Attributes are based on HBAAPI V2.0 definitions.
* Note: OSDeviceName is determined by user-space library
*
* Fixed attributes are not expected to change. The driver is
* expected to set these values after successfully calling scsi_add_host().
* The transport fully manages all get functions w/o driver interaction.
*
* Dynamic attributes are expected to change. The driver participates
* in all get/set operations via functions provided by the driver.
*
* Private attributes are transport-managed values. They are fully
* managed by the transport w/o driver interaction.
*/
#define FC_FC4_LIST_SIZE 32
#define FC_SYMBOLIC_NAME_SIZE 256
#define FC_VERSION_STRING_SIZE 64
#define FC_SERIAL_NUMBER_SIZE 80
struct fc_host_attrs {
/* Fixed Attributes */
u64 node_name;
u64 port_name;
u64 permanent_port_name;
u32 supported_classes;
u8 supported_fc4s[FC_FC4_LIST_SIZE];
u32 supported_speeds;
u32 maxframe_size;
char serial_number[FC_SERIAL_NUMBER_SIZE];
/* Dynamic Attributes */
u32 port_id;
enum fc_port_type port_type;
enum fc_port_state port_state;
u8 active_fc4s[FC_FC4_LIST_SIZE];
u32 speed;
u64 fabric_name;
char symbolic_name[FC_SYMBOLIC_NAME_SIZE];
char system_hostname[FC_SYMBOLIC_NAME_SIZE];
/* Private (Transport-managed) Attributes */
enum fc_tgtid_binding_type tgtid_bind_type;
/* internal data */
struct list_head rports;
struct list_head rport_bindings;
u32 next_rport_number;
u32 next_target_id;
/* work queues for rport state manipulation */
char work_q_name[KOBJ_NAME_LEN];
struct workqueue_struct *work_q;
char devloss_work_q_name[KOBJ_NAME_LEN];
struct workqueue_struct *devloss_work_q;
};
#define shost_to_fc_host(x) \
((struct fc_host_attrs *)(x)->shost_data)
#define fc_host_node_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->node_name)
#define fc_host_port_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->port_name)
#define fc_host_permanent_port_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->permanent_port_name)
#define fc_host_supported_classes(x) \
(((struct fc_host_attrs *)(x)->shost_data)->supported_classes)
#define fc_host_supported_fc4s(x) \
(((struct fc_host_attrs *)(x)->shost_data)->supported_fc4s)
#define fc_host_supported_speeds(x) \
(((struct fc_host_attrs *)(x)->shost_data)->supported_speeds)
#define fc_host_maxframe_size(x) \
(((struct fc_host_attrs *)(x)->shost_data)->maxframe_size)
#define fc_host_serial_number(x) \
(((struct fc_host_attrs *)(x)->shost_data)->serial_number)
#define fc_host_port_id(x) \
(((struct fc_host_attrs *)(x)->shost_data)->port_id)
#define fc_host_port_type(x) \
(((struct fc_host_attrs *)(x)->shost_data)->port_type)
#define fc_host_port_state(x) \
(((struct fc_host_attrs *)(x)->shost_data)->port_state)
#define fc_host_active_fc4s(x) \
(((struct fc_host_attrs *)(x)->shost_data)->active_fc4s)
#define fc_host_speed(x) \
(((struct fc_host_attrs *)(x)->shost_data)->speed)
#define fc_host_fabric_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->fabric_name)
#define fc_host_symbolic_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->symbolic_name)
#define fc_host_system_hostname(x) \
(((struct fc_host_attrs *)(x)->shost_data)->system_hostname)
#define fc_host_tgtid_bind_type(x) \
(((struct fc_host_attrs *)(x)->shost_data)->tgtid_bind_type)
#define fc_host_rports(x) \
(((struct fc_host_attrs *)(x)->shost_data)->rports)
#define fc_host_rport_bindings(x) \
(((struct fc_host_attrs *)(x)->shost_data)->rport_bindings)
#define fc_host_next_rport_number(x) \
(((struct fc_host_attrs *)(x)->shost_data)->next_rport_number)
#define fc_host_next_target_id(x) \
(((struct fc_host_attrs *)(x)->shost_data)->next_target_id)
#define fc_host_work_q_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->work_q_name)
#define fc_host_work_q(x) \
(((struct fc_host_attrs *)(x)->shost_data)->work_q)
#define fc_host_devloss_work_q_name(x) \
(((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q_name)
#define fc_host_devloss_work_q(x) \
(((struct fc_host_attrs *)(x)->shost_data)->devloss_work_q)
/* The functions by which the transport class and the driver communicate */
struct fc_function_template {
void (*get_rport_dev_loss_tmo)(struct fc_rport *);
void (*set_rport_dev_loss_tmo)(struct fc_rport *, u32);
void (*get_starget_node_name)(struct scsi_target *);
void (*get_starget_port_name)(struct scsi_target *);
void (*get_starget_port_id)(struct scsi_target *);
void (*get_host_port_id)(struct Scsi_Host *);
void (*get_host_port_type)(struct Scsi_Host *);
void (*get_host_port_state)(struct Scsi_Host *);
void (*get_host_active_fc4s)(struct Scsi_Host *);
void (*get_host_speed)(struct Scsi_Host *);
void (*get_host_fabric_name)(struct Scsi_Host *);
void (*get_host_symbolic_name)(struct Scsi_Host *);
void (*set_host_system_hostname)(struct Scsi_Host *);
struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
void (*reset_fc_host_stats)(struct Scsi_Host *);
int (*issue_fc_host_lip)(struct Scsi_Host *);
void (*dev_loss_tmo_callbk)(struct fc_rport *);
void (*terminate_rport_io)(struct fc_rport *);
/* allocation lengths for host-specific data */
u32 dd_fcrport_size;
/*
* The driver sets these to tell the transport class it
* wants the attributes displayed in sysfs. If the show_ flag
* is not set, the attribute will be private to the transport
* class
*/
/* remote port fixed attributes */
unsigned long show_rport_maxframe_size:1;
unsigned long show_rport_supported_classes:1;
unsigned long show_rport_dev_loss_tmo:1;
/*
* target dynamic attributes
* These should all be "1" if the driver uses the remote port
* add/delete functions (so attributes reflect rport values).
*/
unsigned long show_starget_node_name:1;
unsigned long show_starget_port_name:1;
unsigned long show_starget_port_id:1;
/* host fixed attributes */
unsigned long show_host_node_name:1;
unsigned long show_host_port_name:1;
unsigned long show_host_permanent_port_name:1;
unsigned long show_host_supported_classes:1;
unsigned long show_host_supported_fc4s:1;
unsigned long show_host_supported_speeds:1;
unsigned long show_host_maxframe_size:1;
unsigned long show_host_serial_number:1;
/* host dynamic attributes */
unsigned long show_host_port_id:1;
unsigned long show_host_port_type:1;
unsigned long show_host_port_state:1;
unsigned long show_host_active_fc4s:1;
unsigned long show_host_speed:1;
unsigned long show_host_fabric_name:1;
unsigned long show_host_symbolic_name:1;
unsigned long show_host_system_hostname:1;
};
/**
* fc_remote_port_chkready - called to validate the remote port state
* prior to initiating io to the port.
*
* Returns a scsi result code that can be returned by the LLDD.
*
* @rport: remote port to be checked
**/
static inline int
fc_remote_port_chkready(struct fc_rport *rport)
{
int result;
switch (rport->port_state) {
case FC_PORTSTATE_ONLINE:
if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
result = 0;
else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
result = DID_IMM_RETRY << 16;
else
result = DID_NO_CONNECT << 16;
break;
case FC_PORTSTATE_BLOCKED:
result = DID_IMM_RETRY << 16;
break;
default:
result = DID_NO_CONNECT << 16;
break;
}
return result;
}
static inline u64 wwn_to_u64(u8 *wwn)
{
return (u64)wwn[0] << 56 | (u64)wwn[1] << 48 |
(u64)wwn[2] << 40 | (u64)wwn[3] << 32 |
(u64)wwn[4] << 24 | (u64)wwn[5] << 16 |
(u64)wwn[6] << 8 | (u64)wwn[7];
}
static inline void u64_to_wwn(u64 inm, u8 *wwn)
{
wwn[0] = (inm >> 56) & 0xff;
wwn[1] = (inm >> 48) & 0xff;
wwn[2] = (inm >> 40) & 0xff;
wwn[3] = (inm >> 32) & 0xff;
wwn[4] = (inm >> 24) & 0xff;
wwn[5] = (inm >> 16) & 0xff;
wwn[6] = (inm >> 8) & 0xff;
wwn[7] = inm & 0xff;
}
struct scsi_transport_template *fc_attach_transport(
struct fc_function_template *);
void fc_release_transport(struct scsi_transport_template *);
void fc_remove_host(struct Scsi_Host *);
struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
int channel, struct fc_rport_identifiers *ids);
void fc_remote_port_delete(struct fc_rport *rport);
void fc_remote_port_rolechg(struct fc_rport *rport, u32 roles);
int scsi_is_fc_rport(const struct device *);
u32 fc_get_event_number(void);
void fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
enum fc_host_event_code event_code, u32 event_data);
void fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
u32 data_len, char * data_buf, u64 vendor_id);
/* Note: when specifying vendor_id to fc_host_post_vendor_event()
* be sure to read the Vendor Type and ID formatting requirements
* specified in scsi_netlink.h
*/
#endif /* SCSI_TRANSPORT_FC_H */

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/*
* iSCSI transport class definitions
*
* Copyright (C) IBM Corporation, 2004
* Copyright (C) Mike Christie, 2004 - 2006
* Copyright (C) Dmitry Yusupov, 2004 - 2005
* Copyright (C) Alex Aizman, 2004 - 2005
*
* 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 SCSI_TRANSPORT_ISCSI_H
#define SCSI_TRANSPORT_ISCSI_H
#include <linux/device.h>
#include <scsi/iscsi_if.h>
struct scsi_transport_template;
struct iscsi_transport;
struct Scsi_Host;
struct iscsi_cls_conn;
struct iscsi_conn;
struct iscsi_cmd_task;
struct iscsi_mgmt_task;
struct sockaddr;
/**
* struct iscsi_transport - iSCSI Transport template
*
* @name: transport name
* @caps: iSCSI Data-Path capabilities
* @create_session: create new iSCSI session object
* @destroy_session: destroy existing iSCSI session object
* @create_conn: create new iSCSI connection
* @bind_conn: associate this connection with existing iSCSI session
* and specified transport descriptor
* @destroy_conn: destroy inactive iSCSI connection
* @set_param: set iSCSI parameter. Return 0 on success, -ENODATA
* when param is not supported, and a -Exx value on other
* error.
* @get_param get iSCSI parameter. Must return number of bytes
* copied to buffer on success, -ENODATA when param
* is not supported, and a -Exx value on other error
* @start_conn: set connection to be operational
* @stop_conn: suspend/recover/terminate connection
* @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
* @session_recovery_timedout: notify LLD a block during recovery timed out
* @init_cmd_task: Initialize a iscsi_cmd_task and any internal structs.
* Called from queuecommand with session lock held.
* @init_mgmt_task: Initialize a iscsi_mgmt_task and any internal structs.
* Called from iscsi_conn_send_generic with xmitmutex.
* @xmit_cmd_task: Requests LLD to transfer cmd task. Returns 0 or the
* the number of bytes transferred on success, and -Exyz
* value on error.
* @xmit_mgmt_task: Requests LLD to transfer mgmt task. Returns 0 or the
* the number of bytes transferred on success, and -Exyz
* value on error.
* @cleanup_cmd_task: requests LLD to fail cmd task. Called with xmitmutex
* and session->lock after the connection has been
* suspended and terminated during recovery. If called
* from abort task then connection is not suspended
* or terminated but sk_callback_lock is held
*
* Template API provided by iSCSI Transport
*/
struct iscsi_transport {
struct module *owner;
char *name;
unsigned int caps;
/* LLD sets this to indicate what values it can export to sysfs */
unsigned int param_mask;
struct scsi_host_template *host_template;
/* LLD connection data size */
int conndata_size;
/* LLD session data size */
int sessiondata_size;
int max_lun;
unsigned int max_conn;
unsigned int max_cmd_len;
struct iscsi_cls_session *(*create_session) (struct iscsi_transport *it,
struct scsi_transport_template *t, uint32_t sn, uint32_t *hn);
void (*destroy_session) (struct iscsi_cls_session *session);
struct iscsi_cls_conn *(*create_conn) (struct iscsi_cls_session *sess,
uint32_t cid);
int (*bind_conn) (struct iscsi_cls_session *session,
struct iscsi_cls_conn *cls_conn,
uint64_t transport_eph, int is_leading);
int (*start_conn) (struct iscsi_cls_conn *conn);
void (*stop_conn) (struct iscsi_cls_conn *conn, int flag);
void (*destroy_conn) (struct iscsi_cls_conn *conn);
int (*set_param) (struct iscsi_cls_conn *conn, enum iscsi_param param,
char *buf, int buflen);
int (*get_conn_param) (struct iscsi_cls_conn *conn,
enum iscsi_param param, char *buf);
int (*get_session_param) (struct iscsi_cls_session *session,
enum iscsi_param param, char *buf);
int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (struct iscsi_cls_conn *conn,
struct iscsi_stats *stats);
void (*init_cmd_task) (struct iscsi_cmd_task *ctask);
void (*init_mgmt_task) (struct iscsi_conn *conn,
struct iscsi_mgmt_task *mtask,
char *data, uint32_t data_size);
int (*xmit_cmd_task) (struct iscsi_conn *conn,
struct iscsi_cmd_task *ctask);
void (*cleanup_cmd_task) (struct iscsi_conn *conn,
struct iscsi_cmd_task *ctask);
int (*xmit_mgmt_task) (struct iscsi_conn *conn,
struct iscsi_mgmt_task *mtask);
void (*session_recovery_timedout) (struct iscsi_cls_session *session);
int (*ep_connect) (struct sockaddr *dst_addr, int non_blocking,
uint64_t *ep_handle);
int (*ep_poll) (uint64_t ep_handle, int timeout_ms);
void (*ep_disconnect) (uint64_t ep_handle);
int (*tgt_dscvr) (enum iscsi_tgt_dscvr type, uint32_t host_no,
uint32_t enable, struct sockaddr *dst_addr);
};
/*
* transport registration upcalls
*/
extern struct scsi_transport_template *iscsi_register_transport(struct iscsi_transport *tt);
extern int iscsi_unregister_transport(struct iscsi_transport *tt);
/*
* control plane upcalls
*/
extern void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error);
extern int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
/* Connection's states */
#define ISCSI_CONN_INITIAL_STAGE 0
#define ISCSI_CONN_STARTED 1
#define ISCSI_CONN_STOPPED 2
#define ISCSI_CONN_CLEANUP_WAIT 3
struct iscsi_cls_conn {
struct list_head conn_list; /* item in connlist */
void *dd_data; /* LLD private data */
struct iscsi_transport *transport;
uint32_t cid; /* connection id */
int active; /* must be accessed with the connlock */
struct device dev; /* sysfs transport/container device */
};
#define iscsi_dev_to_conn(_dev) \
container_of(_dev, struct iscsi_cls_conn, dev)
/* Session's states */
#define ISCSI_STATE_FREE 1
#define ISCSI_STATE_LOGGED_IN 2
#define ISCSI_STATE_FAILED 3
#define ISCSI_STATE_TERMINATE 4
#define ISCSI_STATE_IN_RECOVERY 5
#define ISCSI_STATE_RECOVERY_FAILED 6
struct iscsi_cls_session {
struct list_head sess_list; /* item in session_list */
struct list_head host_list;
struct iscsi_transport *transport;
/* recovery fields */
int recovery_tmo;
struct delayed_work recovery_work;
int target_id;
int sid; /* session id */
void *dd_data; /* LLD private data */
struct device dev; /* sysfs transport/container device */
};
#define iscsi_dev_to_session(_dev) \
container_of(_dev, struct iscsi_cls_session, dev)
#define iscsi_session_to_shost(_session) \
dev_to_shost(_session->dev.parent)
#define starget_to_session(_stgt) \
iscsi_dev_to_session(_stgt->dev.parent)
struct iscsi_host {
struct list_head sessions;
struct mutex mutex;
};
/*
* session and connection functions that can be used by HW iSCSI LLDs
*/
extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost,
struct iscsi_transport *transport);
extern int iscsi_add_session(struct iscsi_cls_session *session,
unsigned int target_id);
extern int iscsi_if_create_session_done(struct iscsi_cls_conn *conn);
extern int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn);
extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost,
struct iscsi_transport *t,
unsigned int target_id);
extern void iscsi_remove_session(struct iscsi_cls_session *session);
extern void iscsi_free_session(struct iscsi_cls_session *session);
extern int iscsi_destroy_session(struct iscsi_cls_session *session);
extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess,
uint32_t cid);
extern int iscsi_destroy_conn(struct iscsi_cls_conn *conn);
extern void iscsi_unblock_session(struct iscsi_cls_session *session);
extern void iscsi_block_session(struct iscsi_cls_session *session);
#endif

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#ifndef SCSI_TRANSPORT_SAS_H
#define SCSI_TRANSPORT_SAS_H
#include <linux/transport_class.h>
#include <linux/types.h>
#include <linux/mutex.h>
struct scsi_transport_template;
struct sas_rphy;
enum sas_device_type {
SAS_PHY_UNUSED,
SAS_END_DEVICE,
SAS_EDGE_EXPANDER_DEVICE,
SAS_FANOUT_EXPANDER_DEVICE,
};
enum sas_protocol {
SAS_PROTOCOL_SATA = 0x01,
SAS_PROTOCOL_SMP = 0x02,
SAS_PROTOCOL_STP = 0x04,
SAS_PROTOCOL_SSP = 0x08,
};
enum sas_linkrate {
/* These Values are defined in the SAS standard */
SAS_LINK_RATE_UNKNOWN = 0,
SAS_PHY_DISABLED = 1,
SAS_PHY_RESET_PROBLEM = 2,
SAS_SATA_SPINUP_HOLD = 3,
SAS_SATA_PORT_SELECTOR = 4,
SAS_PHY_RESET_IN_PROGRESS = 5,
SAS_LINK_RATE_1_5_GBPS = 8,
SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
SAS_LINK_RATE_3_0_GBPS = 9,
SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
SAS_LINK_RATE_6_0_GBPS = 10,
/* These are virtual to the transport class and may never
* be signalled normally since the standard defined field
* is only 4 bits */
SAS_LINK_RATE_FAILED = 0x10,
SAS_PHY_VIRTUAL = 0x11,
};
struct sas_identify {
enum sas_device_type device_type;
enum sas_protocol initiator_port_protocols;
enum sas_protocol target_port_protocols;
u64 sas_address;
u8 phy_identifier;
};
struct sas_phy {
struct device dev;
int number;
int enabled;
/* phy identification */
struct sas_identify identify;
/* phy attributes */
enum sas_linkrate negotiated_linkrate;
enum sas_linkrate minimum_linkrate_hw;
enum sas_linkrate minimum_linkrate;
enum sas_linkrate maximum_linkrate_hw;
enum sas_linkrate maximum_linkrate;
/* link error statistics */
u32 invalid_dword_count;
u32 running_disparity_error_count;
u32 loss_of_dword_sync_count;
u32 phy_reset_problem_count;
/* for the list of phys belonging to a port */
struct list_head port_siblings;
struct work_struct reset_work;
};
#define dev_to_phy(d) \
container_of((d), struct sas_phy, dev)
#define transport_class_to_phy(cdev) \
dev_to_phy((cdev)->dev)
#define phy_to_shost(phy) \
dev_to_shost((phy)->dev.parent)
struct sas_rphy {
struct device dev;
struct sas_identify identify;
struct list_head list;
u32 scsi_target_id;
};
#define dev_to_rphy(d) \
container_of((d), struct sas_rphy, dev)
#define transport_class_to_rphy(cdev) \
dev_to_rphy((cdev)->dev)
#define rphy_to_shost(rphy) \
dev_to_shost((rphy)->dev.parent)
#define target_to_rphy(targ) \
dev_to_rphy((targ)->dev.parent)
struct sas_end_device {
struct sas_rphy rphy;
/* flags */
unsigned ready_led_meaning:1;
/* parameters */
u16 I_T_nexus_loss_timeout;
u16 initiator_response_timeout;
};
#define rphy_to_end_device(r) \
container_of((r), struct sas_end_device, rphy)
struct sas_expander_device {
int level;
int next_port_id;
#define SAS_EXPANDER_VENDOR_ID_LEN 8
char vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
#define SAS_EXPANDER_PRODUCT_ID_LEN 16
char product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
#define SAS_EXPANDER_PRODUCT_REV_LEN 4
char product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
#define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN 8
char component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
u16 component_id;
u8 component_revision_id;
struct sas_rphy rphy;
};
#define rphy_to_expander_device(r) \
container_of((r), struct sas_expander_device, rphy)
struct sas_port {
struct device dev;
int port_identifier;
int num_phys;
/* port flags */
unsigned int is_backlink:1;
/* the other end of the link */
struct sas_rphy *rphy;
struct mutex phy_list_mutex;
struct list_head phy_list;
};
#define dev_to_sas_port(d) \
container_of((d), struct sas_port, dev)
#define transport_class_to_sas_port(cdev) \
dev_to_sas_port((cdev)->dev)
struct sas_phy_linkrates {
enum sas_linkrate maximum_linkrate;
enum sas_linkrate minimum_linkrate;
};
/* The functions by which the transport class and the driver communicate */
struct sas_function_template {
int (*get_linkerrors)(struct sas_phy *);
int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
int (*get_bay_identifier)(struct sas_rphy *);
int (*phy_reset)(struct sas_phy *, int);
int (*phy_enable)(struct sas_phy *, int);
int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
};
void sas_remove_children(struct device *);
extern void sas_remove_host(struct Scsi_Host *);
extern struct sas_phy *sas_phy_alloc(struct device *, int);
extern void sas_phy_free(struct sas_phy *);
extern int sas_phy_add(struct sas_phy *);
extern void sas_phy_delete(struct sas_phy *);
extern int scsi_is_sas_phy(const struct device *);
extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
void sas_rphy_free(struct sas_rphy *);
extern int sas_rphy_add(struct sas_rphy *);
extern void sas_rphy_remove(struct sas_rphy *);
extern void sas_rphy_delete(struct sas_rphy *);
extern int scsi_is_sas_rphy(const struct device *);
struct sas_port *sas_port_alloc(struct device *, int);
struct sas_port *sas_port_alloc_num(struct device *);
int sas_port_add(struct sas_port *);
void sas_port_free(struct sas_port *);
void sas_port_delete(struct sas_port *);
void sas_port_add_phy(struct sas_port *, struct sas_phy *);
void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
void sas_port_mark_backlink(struct sas_port *);
int scsi_is_sas_port(const struct device *);
extern struct scsi_transport_template *
sas_attach_transport(struct sas_function_template *);
extern void sas_release_transport(struct scsi_transport_template *);
int sas_read_port_mode_page(struct scsi_device *);
static inline int
scsi_is_sas_expander_device(struct device *dev)
{
struct sas_rphy *rphy;
if (!scsi_is_sas_rphy(dev))
return 0;
rphy = dev_to_rphy(dev);
return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
}
#define scsi_is_sas_phy_local(phy) scsi_is_host_device((phy)->dev.parent)
#endif /* SCSI_TRANSPORT_SAS_H */

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/*
* Parallel SCSI (SPI) transport specific attributes exported to sysfs.
*
* Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
*
* 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 SCSI_TRANSPORT_SPI_H
#define SCSI_TRANSPORT_SPI_H
#include <linux/transport_class.h>
#include <linux/mutex.h>
struct scsi_transport_template;
struct scsi_target;
struct scsi_device;
struct Scsi_Host;
struct spi_transport_attrs {
int period; /* value in the PPR/SDTR command */
int min_period;
int offset;
int max_offset;
unsigned int width:1; /* 0 - narrow, 1 - wide */
unsigned int max_width:1;
unsigned int iu:1; /* Information Units enabled */
unsigned int dt:1; /* DT clocking enabled */
unsigned int qas:1; /* Quick Arbitration and Selection enabled */
unsigned int wr_flow:1; /* Write Flow control enabled */
unsigned int rd_strm:1; /* Read streaming enabled */
unsigned int rti:1; /* Retain Training Information */
unsigned int pcomp_en:1;/* Precompensation enabled */
unsigned int hold_mcs:1;/* Hold Margin Control Settings */
unsigned int initial_dv:1; /* DV done to this target yet */
unsigned long flags; /* flags field for drivers to use */
/* Device Properties fields */
unsigned int support_sync:1; /* synchronous support */
unsigned int support_wide:1; /* wide support */
unsigned int support_dt:1; /* allows DT phases */
unsigned int support_dt_only; /* disallows ST phases */
unsigned int support_ius; /* support Information Units */
unsigned int support_qas; /* supports quick arbitration and selection */
/* Private Fields */
unsigned int dv_pending:1; /* Internal flag: DV Requested */
unsigned int dv_in_progress:1; /* Internal: DV started */
struct mutex dv_mutex; /* semaphore to serialise dv */
};
enum spi_signal_type {
SPI_SIGNAL_UNKNOWN = 1,
SPI_SIGNAL_SE,
SPI_SIGNAL_LVD,
SPI_SIGNAL_HVD,
};
struct spi_host_attrs {
enum spi_signal_type signalling;
};
/* accessor functions */
#define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period)
#define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period)
#define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset)
#define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset)
#define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width)
#define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width)
#define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu)
#define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt)
#define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas)
#define spi_wr_flow(x) (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
#define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
#define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti)
#define spi_pcomp_en(x) (((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en)
#define spi_hold_mcs(x) (((struct spi_transport_attrs *)&(x)->starget_data)->hold_mcs)
#define spi_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv)
#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
#define spi_support_sync(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_sync)
#define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide)
#define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt)
#define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only)
#define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius)
#define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas)
#define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags)
#define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling)
/* The functions by which the transport class and the driver communicate */
struct spi_function_template {
void (*get_period)(struct scsi_target *);
void (*set_period)(struct scsi_target *, int);
void (*get_offset)(struct scsi_target *);
void (*set_offset)(struct scsi_target *, int);
void (*get_width)(struct scsi_target *);
void (*set_width)(struct scsi_target *, int);
void (*get_iu)(struct scsi_target *);
void (*set_iu)(struct scsi_target *, int);
void (*get_dt)(struct scsi_target *);
void (*set_dt)(struct scsi_target *, int);
void (*get_qas)(struct scsi_target *);
void (*set_qas)(struct scsi_target *, int);
void (*get_wr_flow)(struct scsi_target *);
void (*set_wr_flow)(struct scsi_target *, int);
void (*get_rd_strm)(struct scsi_target *);
void (*set_rd_strm)(struct scsi_target *, int);
void (*get_rti)(struct scsi_target *);
void (*set_rti)(struct scsi_target *, int);
void (*get_pcomp_en)(struct scsi_target *);
void (*set_pcomp_en)(struct scsi_target *, int);
void (*get_hold_mcs)(struct scsi_target *);
void (*set_hold_mcs)(struct scsi_target *, int);
void (*get_signalling)(struct Scsi_Host *);
void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type);
int (*deny_binding)(struct scsi_target *);
/* The driver sets these to tell the transport class it
* wants the attributes displayed in sysfs. If the show_ flag
* is not set, the attribute will be private to the transport
* class */
unsigned long show_period:1;
unsigned long show_offset:1;
unsigned long show_width:1;
unsigned long show_iu:1;
unsigned long show_dt:1;
unsigned long show_qas:1;
unsigned long show_wr_flow:1;
unsigned long show_rd_strm:1;
unsigned long show_rti:1;
unsigned long show_pcomp_en:1;
unsigned long show_hold_mcs:1;
};
struct scsi_transport_template *spi_attach_transport(struct spi_function_template *);
void spi_release_transport(struct scsi_transport_template *);
void spi_schedule_dv_device(struct scsi_device *);
void spi_dv_device(struct scsi_device *);
void spi_display_xfer_agreement(struct scsi_target *);
int spi_print_msg(const unsigned char *);
int spi_populate_width_msg(unsigned char *msg, int width);
int spi_populate_sync_msg(unsigned char *msg, int period, int offset);
int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, int width,
int options);
#endif /* SCSI_TRANSPORT_SPI_H */

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/*
* scsicam.h - SCSI CAM support functions, use for HDIO_GETGEO, etc.
*
* Copyright 1993, 1994 Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@Colorado.EDU
* +1 (303) 786-7975
*
* For more information, please consult the SCSI-CAM draft.
*/
#ifndef SCSICAM_H
#define SCSICAM_H
extern int scsicam_bios_param (struct block_device *bdev, sector_t capacity, int *ip);
extern int scsi_partsize(unsigned char *buf, unsigned long capacity,
unsigned int *cyls, unsigned int *hds, unsigned int *secs);
extern unsigned char *scsi_bios_ptable(struct block_device *bdev);
#endif /* def SCSICAM_H */

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#ifndef _SCSI_GENERIC_H
#define _SCSI_GENERIC_H
#include <linux/compiler.h>
/*
History:
Started: Aug 9 by Lawrence Foard (entropy@world.std.com), to allow user
process control of SCSI devices.
Development Sponsored by Killy Corp. NY NY
Original driver (sg.h):
* Copyright (C) 1992 Lawrence Foard
Version 2 and 3 extensions to driver:
* Copyright (C) 1998 - 2006 Douglas Gilbert
Version: 3.5.34 (20060920)
This version is for 2.6 series kernels.
For a full changelog see http://www.torque.net/sg
Map of SG verions to the Linux kernels in which they appear:
---------- ----------------------------------
original all kernels < 2.2.6
2.1.40 2.2.20
3.0.x optional version 3 sg driver for 2.2 series
3.1.17++ 2.4.0++
3.5.30++ 2.6.0++
Major new features in SG 3.x driver (cf SG 2.x drivers)
- SG_IO ioctl() combines function if write() and read()
- new interface (sg_io_hdr_t) but still supports old interface
- scatter/gather in user space, direct IO, and mmap supported
The normal action of this driver is to use the adapter (HBA) driver to DMA
data into kernel buffers and then use the CPU to copy the data into the
user space (vice versa for writes). That is called "indirect" IO due to
the double handling of data. There are two methods offered to remove the
redundant copy: 1) direct IO and 2) using the mmap() system call to map
the reserve buffer (this driver has one reserve buffer per fd) into the
user space. Both have their advantages.
In terms of absolute speed mmap() is faster. If speed is not a concern,
indirect IO should be fine. Read the documentation for more information.
** N.B. To use direct IO 'echo 1 > /proc/scsi/sg/allow_dio' or
'echo 1 > /sys/module/sg/parameters/allow_dio' is needed.
That attribute is 0 by default. **
Historical note: this SCSI pass-through driver has been known as "sg" for
a decade. In broader kernel discussions "sg" is used to refer to scatter
gather techniques. The context should clarify which "sg" is referred to.
Documentation
=============
A web site for the SG device driver can be found at:
http://www.torque.net/sg [alternatively check the MAINTAINERS file]
The documentation for the sg version 3 driver can be found at:
http://www.torque.net/sg/p/sg_v3_ho.html
This is a rendering from DocBook source [change the extension to "sgml"
or "xml"]. There are renderings in "ps", "pdf", "rtf" and "txt" (soon).
The SG_IO ioctl is now found in other parts kernel (e.g. the block layer).
For more information see http://www.torque.net/sg/sg_io.html
The older, version 2 documents discuss the original sg interface in detail:
http://www.torque.net/sg/p/scsi-generic.txt
http://www.torque.net/sg/p/scsi-generic_long.txt
Also available: <kernel_source>/Documentation/scsi/scsi-generic.txt
Utility and test programs are available at the sg web site. They are
packaged as sg3_utils (for the lk 2.4 and 2.6 series) and sg_utils
(for the lk 2.2 series).
*/
/* New interface introduced in the 3.x SG drivers follows */
typedef struct sg_iovec /* same structure as used by readv() Linux system */
{ /* call. It defines one scatter-gather element. */
void __user *iov_base; /* Starting address */
size_t iov_len; /* Length in bytes */
} sg_iovec_t;
typedef struct sg_io_hdr
{
int interface_id; /* [i] 'S' for SCSI generic (required) */
int dxfer_direction; /* [i] data transfer direction */
unsigned char cmd_len; /* [i] SCSI command length ( <= 16 bytes) */
unsigned char mx_sb_len; /* [i] max length to write to sbp */
unsigned short iovec_count; /* [i] 0 implies no scatter gather */
unsigned int dxfer_len; /* [i] byte count of data transfer */
void __user *dxferp; /* [i], [*io] points to data transfer memory
or scatter gather list */
unsigned char __user *cmdp; /* [i], [*i] points to command to perform */
void __user *sbp; /* [i], [*o] points to sense_buffer memory */
unsigned int timeout; /* [i] MAX_UINT->no timeout (unit: millisec) */
unsigned int flags; /* [i] 0 -> default, see SG_FLAG... */
int pack_id; /* [i->o] unused internally (normally) */
void __user * usr_ptr; /* [i->o] unused internally */
unsigned char status; /* [o] scsi status */
unsigned char masked_status;/* [o] shifted, masked scsi status */
unsigned char msg_status; /* [o] messaging level data (optional) */
unsigned char sb_len_wr; /* [o] byte count actually written to sbp */
unsigned short host_status; /* [o] errors from host adapter */
unsigned short driver_status;/* [o] errors from software driver */
int resid; /* [o] dxfer_len - actual_transferred */
unsigned int duration; /* [o] time taken by cmd (unit: millisec) */
unsigned int info; /* [o] auxiliary information */
} sg_io_hdr_t; /* 64 bytes long (on i386) */
#define SG_INTERFACE_ID_ORIG 'S'
/* Use negative values to flag difference from original sg_header structure */
#define SG_DXFER_NONE (-1) /* e.g. a SCSI Test Unit Ready command */
#define SG_DXFER_TO_DEV (-2) /* e.g. a SCSI WRITE command */
#define SG_DXFER_FROM_DEV (-3) /* e.g. a SCSI READ command */
#define SG_DXFER_TO_FROM_DEV (-4) /* treated like SG_DXFER_FROM_DEV with the
additional property than during indirect
IO the user buffer is copied into the
kernel buffers before the transfer */
#define SG_DXFER_UNKNOWN (-5) /* Unknown data direction */
/* following flag values can be "or"-ed together */
#define SG_FLAG_DIRECT_IO 1 /* default is indirect IO */
#define SG_FLAG_UNUSED_LUN_INHIBIT 2 /* default is overwrite lun in SCSI */
/* command block (when <= SCSI_2) */
#define SG_FLAG_MMAP_IO 4 /* request memory mapped IO */
#define SG_FLAG_NO_DXFER 0x10000 /* no transfer of kernel buffers to/from */
/* user space (debug indirect IO) */
/* following 'info' values are "or"-ed together */
#define SG_INFO_OK_MASK 0x1
#define SG_INFO_OK 0x0 /* no sense, host nor driver "noise" */
#define SG_INFO_CHECK 0x1 /* something abnormal happened */
#define SG_INFO_DIRECT_IO_MASK 0x6
#define SG_INFO_INDIRECT_IO 0x0 /* data xfer via kernel buffers (or no xfer) */
#define SG_INFO_DIRECT_IO 0x2 /* direct IO requested and performed */
#define SG_INFO_MIXED_IO 0x4 /* part direct, part indirect IO */
typedef struct sg_scsi_id { /* used by SG_GET_SCSI_ID ioctl() */
int host_no; /* as in "scsi<n>" where 'n' is one of 0, 1, 2 etc */
int channel;
int scsi_id; /* scsi id of target device */
int lun;
int scsi_type; /* TYPE_... defined in scsi/scsi.h */
short h_cmd_per_lun;/* host (adapter) maximum commands per lun */
short d_queue_depth;/* device (or adapter) maximum queue length */
int unused[2]; /* probably find a good use, set 0 for now */
} sg_scsi_id_t; /* 32 bytes long on i386 */
typedef struct sg_req_info { /* used by SG_GET_REQUEST_TABLE ioctl() */
char req_state; /* 0 -> not used, 1 -> written, 2 -> ready to read */
char orphan; /* 0 -> normal request, 1 -> from interruped SG_IO */
char sg_io_owned; /* 0 -> complete with read(), 1 -> owned by SG_IO */
char problem; /* 0 -> no problem detected, 1 -> error to report */
int pack_id; /* pack_id associated with request */
void __user *usr_ptr; /* user provided pointer (in new interface) */
unsigned int duration; /* millisecs elapsed since written (req_state==1)
or request duration (req_state==2) */
int unused;
} sg_req_info_t; /* 20 bytes long on i386 */
/* IOCTLs: Those ioctls that are relevant to the SG 3.x drivers follow.
[Those that only apply to the SG 2.x drivers are at the end of the file.]
(_GET_s yield result via 'int *' 3rd argument unless otherwise indicated) */
#define SG_EMULATED_HOST 0x2203 /* true for emulated host adapter (ATAPI) */
/* Used to configure SCSI command transformation layer for ATAPI devices */
/* Only supported by the ide-scsi driver */
#define SG_SET_TRANSFORM 0x2204 /* N.B. 3rd arg is not pointer but value: */
/* 3rd arg = 0 to disable transform, 1 to enable it */
#define SG_GET_TRANSFORM 0x2205
#define SG_SET_RESERVED_SIZE 0x2275 /* request a new reserved buffer size */
#define SG_GET_RESERVED_SIZE 0x2272 /* actual size of reserved buffer */
/* The following ioctl has a 'sg_scsi_id_t *' object as its 3rd argument. */
#define SG_GET_SCSI_ID 0x2276 /* Yields fd's bus, chan, dev, lun + type */
/* SCSI id information can also be obtained from SCSI_IOCTL_GET_IDLUN */
/* Override host setting and always DMA using low memory ( <16MB on i386) */
#define SG_SET_FORCE_LOW_DMA 0x2279 /* 0-> use adapter setting, 1-> force */
#define SG_GET_LOW_DMA 0x227a /* 0-> use all ram for dma; 1-> low dma ram */
/* When SG_SET_FORCE_PACK_ID set to 1, pack_id is input to read() which
tries to fetch a packet with a matching pack_id, waits, or returns EAGAIN.
If pack_id is -1 then read oldest waiting. When ...FORCE_PACK_ID set to 0
then pack_id ignored by read() and oldest readable fetched. */
#define SG_SET_FORCE_PACK_ID 0x227b
#define SG_GET_PACK_ID 0x227c /* Yields oldest readable pack_id (or -1) */
#define SG_GET_NUM_WAITING 0x227d /* Number of commands awaiting read() */
/* Yields max scatter gather tablesize allowed by current host adapter */
#define SG_GET_SG_TABLESIZE 0x227F /* 0 implies can't do scatter gather */
#define SG_GET_VERSION_NUM 0x2282 /* Example: version 2.1.34 yields 20134 */
/* Returns -EBUSY if occupied. 3rd argument pointer to int (see next) */
#define SG_SCSI_RESET 0x2284
/* Associated values that can be given to SG_SCSI_RESET follow */
#define SG_SCSI_RESET_NOTHING 0
#define SG_SCSI_RESET_DEVICE 1
#define SG_SCSI_RESET_BUS 2
#define SG_SCSI_RESET_HOST 3
/* synchronous SCSI command ioctl, (only in version 3 interface) */
#define SG_IO 0x2285 /* similar effect as write() followed by read() */
#define SG_GET_REQUEST_TABLE 0x2286 /* yields table of active requests */
/* How to treat EINTR during SG_IO ioctl(), only in SG 3.x series */
#define SG_SET_KEEP_ORPHAN 0x2287 /* 1 -> hold for read(), 0 -> drop (def) */
#define SG_GET_KEEP_ORPHAN 0x2288
/* yields scsi midlevel's access_count for this SCSI device */
#define SG_GET_ACCESS_COUNT 0x2289
#define SG_SCATTER_SZ (8 * 4096)
/* Largest size (in bytes) a single scatter-gather list element can have.
The value used by the driver is 'max(SG_SCATTER_SZ, PAGE_SIZE)'.
This value should be a power of 2 (and may be rounded up internally).
If scatter-gather is not supported by adapter then this value is the
largest data block that can be read/written by a single scsi command. */
#define SG_DEFAULT_RETRIES 0
/* Defaults, commented if they differ from original sg driver */
#define SG_DEF_FORCE_LOW_DMA 0 /* was 1 -> memory below 16MB on i386 */
#define SG_DEF_FORCE_PACK_ID 0
#define SG_DEF_KEEP_ORPHAN 0
#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ /* load time option */
/* maximum outstanding requests, write() yields EDOM if exceeded */
#define SG_MAX_QUEUE 16
#define SG_BIG_BUFF SG_DEF_RESERVED_SIZE /* for backward compatibility */
/* Alternate style type names, "..._t" variants preferred */
typedef struct sg_io_hdr Sg_io_hdr;
typedef struct sg_io_vec Sg_io_vec;
typedef struct sg_scsi_id Sg_scsi_id;
typedef struct sg_req_info Sg_req_info;
/* vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv */
/* The older SG interface based on the 'sg_header' structure follows. */
/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ */
#define SG_MAX_SENSE 16 /* this only applies to the sg_header interface */
struct sg_header
{
int pack_len; /* [o] reply_len (ie useless), ignored as input */
int reply_len; /* [i] max length of expected reply (inc. sg_header) */
int pack_id; /* [io] id number of packet (use ints >= 0) */
int result; /* [o] 0==ok, else (+ve) Unix errno (best ignored) */
unsigned int twelve_byte:1;
/* [i] Force 12 byte command length for group 6 & 7 commands */
unsigned int target_status:5; /* [o] scsi status from target */
unsigned int host_status:8; /* [o] host status (see "DID" codes) */
unsigned int driver_status:8; /* [o] driver status+suggestion */
unsigned int other_flags:10; /* unused */
unsigned char sense_buffer[SG_MAX_SENSE]; /* [o] Output in 3 cases:
when target_status is CHECK_CONDITION or
when target_status is COMMAND_TERMINATED or
when (driver_status & DRIVER_SENSE) is true. */
}; /* This structure is 36 bytes long on i386 */
/* IOCTLs: The following are not required (or ignored) when the sg_io_hdr_t
interface is used. They are kept for backward compatibility with
the original and version 2 drivers. */
#define SG_SET_TIMEOUT 0x2201 /* unit: jiffies (10ms on i386) */
#define SG_GET_TIMEOUT 0x2202 /* yield timeout as _return_ value */
/* Get/set command queuing state per fd (default is SG_DEF_COMMAND_Q.
Each time a sg_io_hdr_t object is seen on this file descriptor, this
command queuing flag is set on (overriding the previous setting). */
#define SG_GET_COMMAND_Q 0x2270 /* Yields 0 (queuing off) or 1 (on) */
#define SG_SET_COMMAND_Q 0x2271 /* Change queuing state with 0 or 1 */
/* Turn on/off error sense trace (1 and 0 respectively, default is off).
Try using: "# cat /proc/scsi/sg/debug" instead in the v3 driver */
#define SG_SET_DEBUG 0x227e /* 0 -> turn off debug */
#define SG_NEXT_CMD_LEN 0x2283 /* override SCSI command length with given
number on the next write() on this file descriptor */
/* Defaults, commented if they differ from original sg driver */
#ifdef __KERNEL__
#define SG_DEFAULT_TIMEOUT_USER (60*USER_HZ) /* HZ == 'jiffies in 1 second' */
#else
#define SG_DEFAULT_TIMEOUT (60*HZ) /* HZ == 'jiffies in 1 second' */
#endif
#define SG_DEF_COMMAND_Q 0 /* command queuing is always on when
the new interface is used */
#define SG_DEF_UNDERRUN_FLAG 0
#endif

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/*
* Copyright (c) 2005 Cisco Systems. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: srp.h,v 1.1.1.1 2007/06/12 07:27:16 eyryu Exp $
*/
#ifndef SCSI_SRP_H
#define SCSI_SRP_H
/*
* Structures and constants for the SCSI RDMA Protocol (SRP) as
* defined by the INCITS T10 committee. This file was written using
* draft Revision 16a of the SRP standard.
*/
#include <linux/types.h>
enum {
SRP_LOGIN_REQ = 0x00,
SRP_TSK_MGMT = 0x01,
SRP_CMD = 0x02,
SRP_I_LOGOUT = 0x03,
SRP_LOGIN_RSP = 0xc0,
SRP_RSP = 0xc1,
SRP_LOGIN_REJ = 0xc2,
SRP_T_LOGOUT = 0x80,
SRP_CRED_REQ = 0x81,
SRP_AER_REQ = 0x82,
SRP_CRED_RSP = 0x41,
SRP_AER_RSP = 0x42
};
enum {
SRP_BUF_FORMAT_DIRECT = 1 << 1,
SRP_BUF_FORMAT_INDIRECT = 1 << 2
};
enum {
SRP_NO_DATA_DESC = 0,
SRP_DATA_DESC_DIRECT = 1,
SRP_DATA_DESC_INDIRECT = 2
};
enum {
SRP_TSK_ABORT_TASK = 0x01,
SRP_TSK_ABORT_TASK_SET = 0x02,
SRP_TSK_CLEAR_TASK_SET = 0x04,
SRP_TSK_LUN_RESET = 0x08,
SRP_TSK_CLEAR_ACA = 0x40
};
enum srp_login_rej_reason {
SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
};
enum {
SRP_REV10_IB_IO_CLASS = 0xff00,
SRP_REV16A_IB_IO_CLASS = 0x0100
};
struct srp_direct_buf {
__be64 va;
__be32 key;
__be32 len;
};
/*
* We need the packed attribute because the SRP spec puts the list of
* descriptors at an offset of 20, which is not aligned to the size of
* struct srp_direct_buf. The whole structure must be packed to avoid
* having the 20-byte structure padded to 24 bytes on 64-bit architectures.
*/
struct srp_indirect_buf {
struct srp_direct_buf table_desc;
__be32 len;
struct srp_direct_buf desc_list[0];
} __attribute__((packed));
enum {
SRP_MULTICHAN_SINGLE = 0,
SRP_MULTICHAN_MULTI = 1
};
struct srp_login_req {
u8 opcode;
u8 reserved1[7];
u64 tag;
__be32 req_it_iu_len;
u8 reserved2[4];
__be16 req_buf_fmt;
u8 req_flags;
u8 reserved3[5];
u8 initiator_port_id[16];
u8 target_port_id[16];
};
/*
* The SRP spec defines the size of the LOGIN_RSP structure to be 52
* bytes, so it needs to be packed to avoid having it padded to 56
* bytes on 64-bit architectures.
*/
struct srp_login_rsp {
u8 opcode;
u8 reserved1[3];
__be32 req_lim_delta;
u64 tag;
__be32 max_it_iu_len;
__be32 max_ti_iu_len;
__be16 buf_fmt;
u8 rsp_flags;
u8 reserved2[25];
} __attribute__((packed));
struct srp_login_rej {
u8 opcode;
u8 reserved1[3];
__be32 reason;
u64 tag;
u8 reserved2[8];
__be16 buf_fmt;
u8 reserved3[6];
};
struct srp_i_logout {
u8 opcode;
u8 reserved[7];
u64 tag;
};
struct srp_t_logout {
u8 opcode;
u8 sol_not;
u8 reserved[2];
__be32 reason;
u64 tag;
};
/*
* We need the packed attribute because the SRP spec only aligns the
* 8-byte LUN field to 4 bytes.
*/
struct srp_tsk_mgmt {
u8 opcode;
u8 sol_not;
u8 reserved1[6];
u64 tag;
u8 reserved2[4];
__be64 lun __attribute__((packed));
u8 reserved3[2];
u8 tsk_mgmt_func;
u8 reserved4;
u64 task_tag;
u8 reserved5[8];
};
/*
* We need the packed attribute because the SRP spec only aligns the
* 8-byte LUN field to 4 bytes.
*/
struct srp_cmd {
u8 opcode;
u8 sol_not;
u8 reserved1[3];
u8 buf_fmt;
u8 data_out_desc_cnt;
u8 data_in_desc_cnt;
u64 tag;
u8 reserved2[4];
__be64 lun __attribute__((packed));
u8 reserved3;
u8 task_attr;
u8 reserved4;
u8 add_cdb_len;
u8 cdb[16];
u8 add_data[0];
};
enum {
SRP_RSP_FLAG_RSPVALID = 1 << 0,
SRP_RSP_FLAG_SNSVALID = 1 << 1,
SRP_RSP_FLAG_DOOVER = 1 << 2,
SRP_RSP_FLAG_DOUNDER = 1 << 3,
SRP_RSP_FLAG_DIOVER = 1 << 4,
SRP_RSP_FLAG_DIUNDER = 1 << 5
};
/*
* The SRP spec defines the size of the RSP structure to be 36 bytes,
* so it needs to be packed to avoid having it padded to 40 bytes on
* 64-bit architectures.
*/
struct srp_rsp {
u8 opcode;
u8 sol_not;
u8 reserved1[2];
__be32 req_lim_delta;
u64 tag;
u8 reserved2[2];
u8 flags;
u8 status;
__be32 data_out_res_cnt;
__be32 data_in_res_cnt;
__be32 sense_data_len;
__be32 resp_data_len;
u8 data[0];
} __attribute__((packed));
#endif /* SCSI_SRP_H */