Hank Janssen | ab05778 | 2009-07-13 15:19:28 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) 2009, Microsoft Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 16 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 17 | * |
| 18 | * Authors: |
| 19 | * Haiyang Zhang <haiyangz@microsoft.com> |
| 20 | * Hank Janssen <hjanssen@microsoft.com> |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | #ifndef _STORVSC_API_H_ |
| 26 | #define _STORVSC_API_H_ |
| 27 | |
| 28 | #include "VmbusApi.h" |
| 29 | |
| 30 | // |
| 31 | // Defines |
| 32 | // |
| 33 | |
| 34 | #define STORVSC_RING_BUFFER_SIZE 10*PAGE_SIZE |
| 35 | #define BLKVSC_RING_BUFFER_SIZE 20*PAGE_SIZE |
| 36 | |
| 37 | #define STORVSC_MAX_IO_REQUESTS 64 |
| 38 | |
| 39 | // In Hyper-V, each port/path/target maps to 1 scsi host adapter. |
| 40 | // In reality, the path/target is not used (ie always set to 0) so |
| 41 | // our scsi host adapter essentially has 1 bus with 1 target that contains |
| 42 | // up to 256 luns. |
| 43 | |
| 44 | #define STORVSC_MAX_LUNS_PER_TARGET 64 |
| 45 | #define STORVSC_MAX_TARGETS 1 |
| 46 | #define STORVSC_MAX_CHANNELS 1 |
| 47 | |
| 48 | |
| 49 | // Fwd decl |
| 50 | // |
| 51 | //struct VMBUS_CHANNEL; |
| 52 | typedef struct _STORVSC_REQUEST* PSTORVSC_REQUEST; |
| 53 | |
| 54 | // |
| 55 | // Data types |
| 56 | // |
| 57 | typedef int (*PFN_ON_IO_REQUEST)(PDEVICE_OBJECT Device, PSTORVSC_REQUEST Request); |
| 58 | typedef void (*PFN_ON_IO_REQUEST_COMPLTN)(PSTORVSC_REQUEST Request); |
| 59 | |
| 60 | typedef int (*PFN_ON_HOST_RESET)(PDEVICE_OBJECT Device); |
| 61 | typedef void (*PFN_ON_HOST_RESCAN)(PDEVICE_OBJECT Device); |
| 62 | |
| 63 | |
| 64 | // Matches Windows-end |
| 65 | typedef enum _STORVSC_REQUEST_TYPE{ |
| 66 | WRITE_TYPE, |
| 67 | READ_TYPE, |
| 68 | UNKNOWN_TYPE, |
| 69 | } STORVSC_REQUEST_TYPE; |
| 70 | |
| 71 | |
| 72 | typedef struct _STORVSC_REQUEST { |
| 73 | STORVSC_REQUEST_TYPE Type; |
| 74 | UINT32 Host; |
| 75 | UINT32 Bus; |
| 76 | UINT32 TargetId; |
| 77 | UINT32 LunId; |
| 78 | UINT8* Cdb; |
| 79 | UINT32 CdbLen; |
| 80 | UINT32 Status; |
| 81 | UINT32 BytesXfer; |
| 82 | |
| 83 | UCHAR* SenseBuffer; |
| 84 | UINT32 SenseBufferSize; |
| 85 | |
| 86 | PVOID Context; |
| 87 | |
| 88 | PFN_ON_IO_REQUEST_COMPLTN OnIOCompletion; |
| 89 | |
| 90 | // This points to the memory after DataBuffer |
| 91 | PVOID Extension; |
| 92 | |
| 93 | MULTIPAGE_BUFFER DataBuffer; |
| 94 | } STORVSC_REQUEST; |
| 95 | |
| 96 | |
| 97 | // Represents the block vsc driver |
| 98 | typedef struct _STORVSC_DRIVER_OBJECT { |
| 99 | DRIVER_OBJECT Base; // Must be the first field |
| 100 | |
| 101 | // Set by caller (in bytes) |
| 102 | UINT32 RingBufferSize; |
| 103 | |
| 104 | // Allocate this much private extension for each I/O request |
| 105 | UINT32 RequestExtSize; |
| 106 | |
| 107 | // Maximum # of requests in flight per channel/device |
| 108 | UINT32 MaxOutstandingRequestsPerChannel; |
| 109 | |
| 110 | // Set by the caller to allow us to re-enumerate the bus on the host |
| 111 | PFN_ON_HOST_RESCAN OnHostRescan; |
| 112 | |
| 113 | // Specific to this driver |
| 114 | PFN_ON_IO_REQUEST OnIORequest; |
| 115 | PFN_ON_HOST_RESET OnHostReset; |
| 116 | |
| 117 | } STORVSC_DRIVER_OBJECT; |
| 118 | |
| 119 | typedef struct _STORVSC_DEVICE_INFO { |
| 120 | ULONG PortNumber; |
| 121 | UCHAR PathId; |
| 122 | UCHAR TargetId; |
| 123 | } STORVSC_DEVICE_INFO; |
| 124 | |
| 125 | // |
| 126 | // Interface |
| 127 | // |
| 128 | int |
| 129 | StorVscInitialize( |
| 130 | DRIVER_OBJECT *Driver |
| 131 | ); |
| 132 | |
| 133 | int |
| 134 | BlkVscInitialize( |
| 135 | DRIVER_OBJECT *Driver |
| 136 | ); |
| 137 | #endif // _STORVSC_API_H_ |