diff options
Diffstat (limited to 'drivers/staging/hv/include/StorVscApi.h')
-rw-r--r-- | drivers/staging/hv/include/StorVscApi.h | 139 |
1 files changed, 139 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..5d72f2997436 --- /dev/null +++ b/drivers/staging/hv/include/StorVscApi.h @@ -0,0 +1,139 @@ +/* + * + * 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; */ +struct hv_storvsc_request; + + +/* Data types */ + +typedef int (*PFN_ON_IO_REQUEST)(struct hv_device *Device, struct hv_storvsc_request *Request); +typedef void (*PFN_ON_IO_REQUEST_COMPLTN)(struct hv_storvsc_request *Request); + +typedef int (*PFN_ON_HOST_RESET)(struct hv_device *Device); +typedef void (*PFN_ON_HOST_RESCAN)(struct hv_device *Device); + + +/* Matches Windows-end */ +typedef enum _STORVSC_REQUEST_TYPE{ + WRITE_TYPE, + READ_TYPE, + UNKNOWN_TYPE, +} STORVSC_REQUEST_TYPE; + + +struct hv_storvsc_request { + STORVSC_REQUEST_TYPE Type; + u32 Host; + u32 Bus; + u32 TargetId; + u32 LunId; + u8 * Cdb; + u32 CdbLen; + u32 Status; + u32 BytesXfer; + + unsigned char* SenseBuffer; + u32 SenseBufferSize; + + void * Context; + + PFN_ON_IO_REQUEST_COMPLTN OnIOCompletion; + + /* This points to the memory after DataBuffer */ + void * Extension; + + MULTIPAGE_BUFFER DataBuffer; +}; + + +/* Represents the block vsc driver */ +typedef struct _STORVSC_DRIVER_OBJECT { + struct hv_driver Base; /* Must be the first field */ + + /* Set by caller (in bytes) */ + u32 RingBufferSize; + + /* Allocate this much private extension for each I/O request */ + u32 RequestExtSize; + + /* Maximum # of requests in flight per channel/device */ + u32 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 { + unsigned int PortNumber; + unsigned char PathId; + unsigned char TargetId; +} STORVSC_DEVICE_INFO; + + +/* Interface */ + +int +StorVscInitialize( + struct hv_driver *Driver + ); + +int +BlkVscInitialize( + struct hv_driver *Driver + ); +#endif /* _STORVSC_API_H_ */ |