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/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*
*/
/* vstorage.w revision number. This is used in the case of a version match, */
/* to alert the user that structure sizes may be mismatched even though the */
/* protocol versions match. */
#define REVISION_STRING(REVISION_) #REVISION_
#define FILL_VMSTOR_REVISION(RESULT_LVALUE_) \
{ \
char *revisionString = REVISION_STRING($Revision: 6 $) + 11; \
RESULT_LVALUE_ = 0; \
while (*revisionString >= '0' && *revisionString <= '9') { \
RESULT_LVALUE_ *= 10; \
RESULT_LVALUE_ += *revisionString - '0'; \
revisionString++; \
} \
}
/* Major/minor macros. Minor version is in LSB, meaning that earlier flat */
/* version numbers will be interpreted as "0.x" (i.e., 1 becomes 0.1). */
#define VMSTOR_PROTOCOL_MAJOR(VERSION_) (((VERSION_) >> 8) & 0xff)
#define VMSTOR_PROTOCOL_MINOR(VERSION_) (((VERSION_)) & 0xff)
#define VMSTOR_PROTOCOL_VERSION(MAJOR_, MINOR_) ((((MAJOR_) & 0xff) << 8) | \
(((MINOR_) & 0xff)))
#define VMSTOR_INVALID_PROTOCOL_VERSION (-1)
/* Version history: */
/* V1 Beta 0.1 */
/* V1 RC < 2008/1/31 1.0 */
/* V1 RC > 2008/1/31 2.0 */
#define VMSTOR_PROTOCOL_VERSION_CURRENT VMSTOR_PROTOCOL_VERSION(2, 0)
/* This will get replaced with the max transfer length that is possible on */
/* the host adapter. */
/* The max transfer length will be published when we offer a vmbus channel. */
#define MAX_TRANSFER_LENGTH 0x40000
#define DEFAULT_PACKET_SIZE (sizeof(struct vmdata_gpa_direct) + \
sizeof(struct vstor_packet) + \
sizesizeof(u64) * (MAX_TRANSFER_LENGTH / PAGE_SIZE)))
/* Packet structure describing virtual storage requests. */
enum vstor_packet_operation {
VStorOperationCompleteIo = 1,
VStorOperationRemoveDevice = 2,
VStorOperationExecuteSRB = 3,
VStorOperationResetLun = 4,
VStorOperationResetAdapter = 5,
VStorOperationResetBus = 6,
VStorOperationBeginInitialization = 7,
VStorOperationEndInitialization = 8,
VStorOperationQueryProtocolVersion = 9,
VStorOperationQueryProperties = 10,
VStorOperationMaximum = 10
};
/*
* Platform neutral description of a scsi request -
* this remains the same across the write regardless of 32/64 bit
* note: it's patterned off the SCSI_PASS_THROUGH structure
*/
#define CDB16GENERIC_LENGTH 0x10
#ifndef SENSE_BUFFER_SIZE
#define SENSE_BUFFER_SIZE 0x12
#endif
#define MAX_DATA_BUFFER_LENGTH_WITH_PADDING 0x14
struct vmscsi_request {
unsigned short Length;
unsigned char SrbStatus;
unsigned char ScsiStatus;
unsigned char PortNumber;
unsigned char PathId;
unsigned char TargetId;
unsigned char Lun;
unsigned char CdbLength;
unsigned char SenseInfoLength;
unsigned char DataIn;
unsigned char Reserved;
unsigned int DataTransferLength;
union {
unsigned char Cdb[CDB16GENERIC_LENGTH];
unsigned char SenseData[SENSE_BUFFER_SIZE];
unsigned char ReservedArray[MAX_DATA_BUFFER_LENGTH_WITH_PADDING];
};
} __attribute((packed));
/*
* This structure is sent during the intialization phase to get the different
* properties of the channel.
*/
struct vmstorage_channel_properties {
unsigned short ProtocolVersion;
unsigned char PathId;
unsigned char TargetId;
/* Note: port number is only really known on the client side */
unsigned int PortNumber;
unsigned int Flags;
unsigned int MaxTransferBytes;
/* This id is unique for each channel and will correspond with */
/* vendor specific data in the inquirydata */
unsigned long long UniqueId;
} __attribute__((packed));
/* This structure is sent during the storage protocol negotiations. */
struct vmstorage_protocol_version {
/* Major (MSW) and minor (LSW) version numbers. */
unsigned short MajorMinor;
/*
* Revision number is auto-incremented whenever this file is changed
* (See FILL_VMSTOR_REVISION macro above). Mismatch does not
* definitely indicate incompatibility--but it does indicate mismatched
* builds.
*/
unsigned short Revision;
} __attribute__((packed));
/* Channel Property Flags */
#define STORAGE_CHANNEL_REMOVABLE_FLAG 0x1
#define STORAGE_CHANNEL_EMULATED_IDE_FLAG 0x2
struct vstor_packet {
/* Requested operation type */
enum vstor_packet_operation Operation;
/* Flags - see below for values */
unsigned int Flags;
/* Status of the request returned from the server side. */
unsigned int Status;
/* Data payload area */
union {
/*
* Structure used to forward SCSI commands from the
* client to the server.
*/
struct vmscsi_request VmSrb;
/* Structure used to query channel properties. */
struct vmstorage_channel_properties StorageChannelProperties;
/* Used during version negotiations. */
struct vmstorage_protocol_version Version;
};
} __attribute__((packed));
/* Packet flags */
/*
* This flag indicates that the server should send back a completion for this
* packet.
*/
#define REQUEST_COMPLETION_FLAG 0x1
/* This is the set of flags that the vsc can set in any packets it sends */
#define VSC_LEGAL_FLAGS (REQUEST_COMPLETION_FLAG)
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