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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>
*
*/
#ifndef _STORVSC_API_H_
#define _STORVSC_API_H_
#include "VmbusApi.h"
//
// Defines
//
#define STORVSC_RING_BUFFER_SIZE 10*PAGE_SIZE
#define BLKVSC_RING_BUFFER_SIZE 20*PAGE_SIZE
#define STORVSC_MAX_IO_REQUESTS 64
// In Hyper-V, each port/path/target maps to 1 scsi host adapter.
// In reality, the path/target is not used (ie always set to 0) so
// our scsi host adapter essentially has 1 bus with 1 target that contains
// up to 256 luns.
#define STORVSC_MAX_LUNS_PER_TARGET 64
#define STORVSC_MAX_TARGETS 1
#define STORVSC_MAX_CHANNELS 1
// Fwd decl
//
//struct VMBUS_CHANNEL;
typedef struct _STORVSC_REQUEST* PSTORVSC_REQUEST;
//
// Data types
//
typedef int (*PFN_ON_IO_REQUEST)(PDEVICE_OBJECT Device, PSTORVSC_REQUEST Request);
typedef void (*PFN_ON_IO_REQUEST_COMPLTN)(PSTORVSC_REQUEST Request);
typedef int (*PFN_ON_HOST_RESET)(PDEVICE_OBJECT Device);
typedef void (*PFN_ON_HOST_RESCAN)(PDEVICE_OBJECT Device);
// Matches Windows-end
typedef enum _STORVSC_REQUEST_TYPE{
WRITE_TYPE,
READ_TYPE,
UNKNOWN_TYPE,
} STORVSC_REQUEST_TYPE;
typedef struct _STORVSC_REQUEST {
STORVSC_REQUEST_TYPE Type;
UINT32 Host;
UINT32 Bus;
UINT32 TargetId;
UINT32 LunId;
u8 * Cdb;
UINT32 CdbLen;
UINT32 Status;
UINT32 BytesXfer;
UCHAR* SenseBuffer;
UINT32 SenseBufferSize;
void * Context;
PFN_ON_IO_REQUEST_COMPLTN OnIOCompletion;
// This points to the memory after DataBuffer
void * Extension;
MULTIPAGE_BUFFER DataBuffer;
} STORVSC_REQUEST;
// Represents the block vsc driver
typedef struct _STORVSC_DRIVER_OBJECT {
DRIVER_OBJECT Base; // Must be the first field
// Set by caller (in bytes)
UINT32 RingBufferSize;
// Allocate this much private extension for each I/O request
UINT32 RequestExtSize;
// Maximum # of requests in flight per channel/device
UINT32 MaxOutstandingRequestsPerChannel;
// Set by the caller to allow us to re-enumerate the bus on the host
PFN_ON_HOST_RESCAN OnHostRescan;
// Specific to this driver
PFN_ON_IO_REQUEST OnIORequest;
PFN_ON_HOST_RESET OnHostReset;
} STORVSC_DRIVER_OBJECT;
typedef struct _STORVSC_DEVICE_INFO {
ULONG PortNumber;
UCHAR PathId;
UCHAR TargetId;
} STORVSC_DEVICE_INFO;
//
// Interface
//
int
StorVscInitialize(
DRIVER_OBJECT *Driver
);
int
BlkVscInitialize(
DRIVER_OBJECT *Driver
);
#endif // _STORVSC_API_H_
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