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Diffstat (limited to 'drivers/staging/hv/include/StorVscApi.h')
| -rw-r--r-- | drivers/staging/hv/include/StorVscApi.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/staging/hv/include/StorVscApi.h b/drivers/staging/hv/include/StorVscApi.h new file mode 100644 index 000000000000..492a1d207e3a --- /dev/null +++ b/drivers/staging/hv/include/StorVscApi.h @@ -0,0 +1,137 @@ +/* + * + * 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; + UINT8* Cdb; + UINT32 CdbLen; + UINT32 Status; + UINT32 BytesXfer; + + UCHAR* SenseBuffer; + UINT32 SenseBufferSize; + + PVOID Context; + + PFN_ON_IO_REQUEST_COMPLTN OnIOCompletion; + + // This points to the memory after DataBuffer + PVOID 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_ |