| /* |
| * |
| * 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_ */ |