/* SPDX-License-Identifier: GPL-2.0-or-later */
/*****************************************************************************/
/* srp.h -- SCSI RDMA Protocol definitions */
/* */
/* Written By: Colin Devilbis, IBM Corporation */
/* */
/* Copyright (C) 2003 IBM Corporation */
/* */
/* */
/* 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
