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Release 4.14 include/scsi/viosrp.h

Directory: include/scsi
/*****************************************************************************/
/* srp.h -- SCSI RDMA Protocol definitions                                   */
/*                                                                           */
/* Written By: Colin Devilbis, IBM Corporation                               */
/*                                                                           */
/* Copyright (C) 2003 IBM 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.                              */
/*                                                                           */
/* This file contains structures and definitions for IBM RPA (RS/6000        */
/* platform architecture) implementation of the SRP (SCSI RDMA Protocol)     */
/* standard.  SRP is used on IBM iSeries and pSeries platforms to send SCSI  */
/* commands between logical partitions.                                      */
/*                                                                           */
/* SRP Information Units (IUs) are sent on a "Command/Response Queue" (CRQ)  */
/* between partitions.  The definitions in this file are architected,        */
/* and cannot be changed without breaking compatibility with other versions  */
/* of Linux and other operating systems (AIX, OS/400) that talk this protocol*/
/* between logical partitions                                                */
/*****************************************************************************/
#ifndef VIOSRP_H

#define VIOSRP_H
#include <scsi/srp.h>


#define SRP_VERSION "16.a"

#define SRP_MAX_IU_LEN	256

#define SRP_MAX_LOC_LEN 32


union srp_iu {
	
struct srp_login_req login_req;
	
struct srp_login_rsp login_rsp;
	
struct srp_login_rej login_rej;
	
struct srp_i_logout i_logout;
	
struct srp_t_logout t_logout;
	
struct srp_tsk_mgmt tsk_mgmt;
	
struct srp_cmd cmd;
	
struct srp_rsp rsp;
	
u8 reserved[SRP_MAX_IU_LEN];
};


enum viosrp_crq_headers {
	
VIOSRP_CRQ_FREE = 0x00,
	
VIOSRP_CRQ_CMD_RSP = 0x80,
	
VIOSRP_CRQ_INIT_RSP = 0xC0,
	
VIOSRP_CRQ_XPORT_EVENT = 0xFF
};


enum viosrp_crq_init_formats {
	
VIOSRP_CRQ_INIT = 0x01,
	
VIOSRP_CRQ_INIT_COMPLETE = 0x02
};


enum viosrp_crq_formats {
	
VIOSRP_SRP_FORMAT = 0x01,
	
VIOSRP_MAD_FORMAT = 0x02,
	
VIOSRP_OS400_FORMAT = 0x03,
	
VIOSRP_AIX_FORMAT = 0x04,
	
VIOSRP_LINUX_FORMAT = 0x05,
	
VIOSRP_INLINE_FORMAT = 0x06
};


enum viosrp_crq_status {
	
VIOSRP_OK = 0x0,
	
VIOSRP_NONRECOVERABLE_ERR = 0x1,
	
VIOSRP_VIOLATES_MAX_XFER = 0x2,
	
VIOSRP_PARTNER_PANIC = 0x3,
	
VIOSRP_DEVICE_BUSY = 0x8,
	
VIOSRP_ADAPTER_FAIL = 0x10,
	
VIOSRP_OK2 = 0x99,
};


struct viosrp_crq {
	
u8 valid;		/* used by RPA */
	
u8 format;		/* SCSI vs out-of-band */
	
u8 reserved;
	
u8 status;		/* non-scsi failure? (e.g. DMA failure) */
	
__be16 timeout;		/* in seconds */
	
__be16 IU_length;		/* in bytes */
	
__be64 IU_data_ptr;	/* the TCE for transferring data */
};

/* MADs are Management requests above and beyond the IUs defined in the SRP
 * standard.
 */

enum viosrp_mad_types {
	
VIOSRP_EMPTY_IU_TYPE = 0x01,
	
VIOSRP_ERROR_LOG_TYPE = 0x02,
	
VIOSRP_ADAPTER_INFO_TYPE = 0x03,
	
VIOSRP_CAPABILITIES_TYPE = 0x05,
	
VIOSRP_ENABLE_FAST_FAIL = 0x08,
};


enum viosrp_mad_status {
	
VIOSRP_MAD_SUCCESS = 0x00,
	
VIOSRP_MAD_NOT_SUPPORTED = 0xF1,
	
VIOSRP_MAD_FAILED = 0xF7,
};


enum viosrp_capability_type {
	
MIGRATION_CAPABILITIES = 0x01,
	
RESERVATION_CAPABILITIES = 0x02,
};


enum viosrp_capability_support {
	
SERVER_DOES_NOT_SUPPORTS_CAP = 0x0,
	
SERVER_SUPPORTS_CAP = 0x01,
	
SERVER_CAP_DATA = 0x02,
};


enum viosrp_reserve_type {
	
CLIENT_RESERVE_SCSI_2 = 0x01,
};


enum viosrp_capability_flag {
	
CLIENT_MIGRATED = 0x01,
	
CLIENT_RECONNECT = 0x02,
	
CAP_LIST_SUPPORTED = 0x04,
	
CAP_LIST_DATA = 0x08,
};

/*
 * Common MAD header
 */

struct mad_common {
	
__be32 type;
	
__be16 status;
	
__be16 length;
	
__be64 tag;
};

/*
 * All SRP (and MAD) requests normally flow from the
 * client to the server.  There is no way for the server to send
 * an asynchronous message back to the client.  The Empty IU is used
 * to hang out a meaningless request to the server so that it can respond
 * asynchrouously with something like a SCSI AER
 */

struct viosrp_empty_iu {
	
struct mad_common common;
	
__be64 buffer;
	
__be32 port;
};


struct viosrp_error_log {
	
struct mad_common common;
	
__be64 buffer;
};


struct viosrp_adapter_info {
	
struct mad_common common;
	
__be64 buffer;
};


struct viosrp_fast_fail {
	
struct mad_common common;
};


struct viosrp_capabilities {
	
struct mad_common common;
	
__be64 buffer;
};


struct mad_capability_common {
	
__be32 cap_type;
	
__be16 length;
	
__be16 server_support;
};


struct mad_reserve_cap {
	
struct mad_capability_common common;
	
__be32 type;
};


struct mad_migration_cap {
	
struct mad_capability_common common;
	
__be32 ecl;
};


struct capabilities {
	
__be32 flags;
	
char name[SRP_MAX_LOC_LEN];
	
char loc[SRP_MAX_LOC_LEN];
	
struct mad_migration_cap migration;
	
struct mad_reserve_cap reserve;
};


union mad_iu {
	
struct viosrp_empty_iu empty_iu;
	
struct viosrp_error_log error_log;
	
struct viosrp_adapter_info adapter_info;
	
struct viosrp_fast_fail fast_fail;
	
struct viosrp_capabilities capabilities;
};


union viosrp_iu {
	
union srp_iu srp;
	
union mad_iu mad;
};


struct mad_adapter_info_data {
	
char srp_version[8];
	
char partition_name[96];
	
__be32 partition_number;

#define SRP_MAD_VERSION_1 1
	
__be32 mad_version;

#define SRP_MAD_OS_LINUX 2

#define SRP_MAD_OS_AIX 3
	
__be32 os_type;
	
__be32 port_max_txu[8];	/* per-port maximum transfer */
};

#endif

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Directory: include/scsi
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