1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
*
* 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:
* Hank Janssen <hjanssen@microsoft.com>
*
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include "StorVsc.c"
static const char* gBlkDriverName="blkvsc";
/* {32412632-86cb-44a2-9b5c-50d1417354f5} */
static const GUID gBlkVscDeviceType={
.Data = {0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44, 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5}
};
/* Static routines */
static int
BlkVscOnDeviceAdd(
struct hv_device *Device,
void *AdditionalInfo
);
int
BlkVscInitialize(
struct hv_driver *Driver
)
{
STORVSC_DRIVER_OBJECT* storDriver = (STORVSC_DRIVER_OBJECT*)Driver;
int ret=0;
DPRINT_ENTER(BLKVSC);
/* Make sure we are at least 2 pages since 1 page is used for control */
ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1));
Driver->name = gBlkDriverName;
memcpy(&Driver->deviceType, &gBlkVscDeviceType, sizeof(GUID));
storDriver->RequestExtSize = sizeof(STORVSC_REQUEST_EXTENSION);
/* Divide the ring buffer data size (which is 1 page less than the ring buffer size since that page is reserved for the ring buffer indices) */
/* by the max request size (which is VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER + VSTOR_PACKET + u64) */
storDriver->MaxOutstandingRequestsPerChannel =
((storDriver->RingBufferSize - PAGE_SIZE) / ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET + sizeof(VSTOR_PACKET) + sizeof(u64),sizeof(u64)));
DPRINT_INFO(BLKVSC, "max io outstd %u", storDriver->MaxOutstandingRequestsPerChannel);
/* Setup the dispatch table */
storDriver->Base.OnDeviceAdd = BlkVscOnDeviceAdd;
storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove;
storDriver->Base.OnCleanup = StorVscOnCleanup;
storDriver->OnIORequest = StorVscOnIORequest;
DPRINT_EXIT(BLKVSC);
return ret;
}
static int
BlkVscOnDeviceAdd(
struct hv_device *Device,
void *AdditionalInfo
)
{
int ret=0;
STORVSC_DEVICE_INFO *deviceInfo = (STORVSC_DEVICE_INFO*)AdditionalInfo;
DPRINT_ENTER(BLKVSC);
ret = StorVscOnDeviceAdd(Device, AdditionalInfo);
if (ret != 0)
{
DPRINT_EXIT(BLKVSC);
return ret;
}
/* We need to use the device instance guid to set the path and target id. For IDE devices, the */
/* device instance id is formatted as <bus id> - <device id> - 8899 - 000000000000. */
deviceInfo->PathId = Device->deviceInstance.Data[3] << 24 | Device->deviceInstance.Data[2] << 16 |
Device->deviceInstance.Data[1] << 8 |Device->deviceInstance.Data[0];
deviceInfo->TargetId = Device->deviceInstance.Data[5] << 8 | Device->deviceInstance.Data[4];
DPRINT_EXIT(BLKVSC);
return ret;
}
|
