Staging: hv: add the Hyper-V virtual storage driver
This is the virtual storage driver when running Linux on top of Hyper-V. Signed-off-by: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hank Janssen
Greg Kroah-Hartman
parent
fceaf24a94
commit
bef4a34a28
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@ -0,0 +1,967 @@
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/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#include "logging.h"
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#include "StorVscApi.h"
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#include "VmbusPacketFormat.h"
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#include "vstorage.h"
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//
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// #defines
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//
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//
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// Data types
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//
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typedef struct _STORVSC_REQUEST_EXTENSION {
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//LIST_ENTRY ListEntry;
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STORVSC_REQUEST *Request;
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DEVICE_OBJECT *Device;
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// Synchronize the request/response if needed
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HANDLE WaitEvent;
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VSTOR_PACKET VStorPacket;
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} STORVSC_REQUEST_EXTENSION;
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// A storvsc device is a device object that contains a vmbus channel
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typedef struct _STORVSC_DEVICE{
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DEVICE_OBJECT *Device;
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int RefCount; // 0 indicates the device is being destroyed
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int NumOutstandingRequests;
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// Each unique Port/Path/Target represents 1 channel ie scsi controller. In reality, the pathid, targetid is always 0
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// and the port is set by us
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ULONG PortNumber;
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UCHAR PathId;
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UCHAR TargetId;
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//LIST_ENTRY OutstandingRequestList;
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//HANDLE OutstandingRequestLock;
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// Used for vsc/vsp channel reset process
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STORVSC_REQUEST_EXTENSION InitRequest;
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STORVSC_REQUEST_EXTENSION ResetRequest;
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} STORVSC_DEVICE;
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//
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// Globals
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//
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static const char* gDriverName="storvsc";
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//{ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
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static const GUID gStorVscDeviceType={
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.Data = {0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d, 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f}
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};
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//
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// Internal routines
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//
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static int
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StorVscOnDeviceAdd(
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DEVICE_OBJECT *Device,
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void *AdditionalInfo
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);
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static int
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StorVscOnDeviceRemove(
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DEVICE_OBJECT *Device
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);
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static int
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StorVscOnIORequest(
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DEVICE_OBJECT *Device,
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STORVSC_REQUEST *Request
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);
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static int
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StorVscOnHostReset(
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DEVICE_OBJECT *Device
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);
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static void
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StorVscOnCleanup(
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DRIVER_OBJECT *Device
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);
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static void
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StorVscOnChannelCallback(
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PVOID Context
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);
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static void
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StorVscOnIOCompletion(
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DEVICE_OBJECT *Device,
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VSTOR_PACKET *VStorPacket,
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STORVSC_REQUEST_EXTENSION *RequestExt
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);
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static void
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StorVscOnReceive(
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DEVICE_OBJECT *Device,
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VSTOR_PACKET *VStorPacket,
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STORVSC_REQUEST_EXTENSION *RequestExt
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);
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static int
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StorVscConnectToVsp(
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DEVICE_OBJECT *Device
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);
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static inline STORVSC_DEVICE* AllocStorDevice(DEVICE_OBJECT *Device)
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{
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STORVSC_DEVICE *storDevice;
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storDevice = MemAllocZeroed(sizeof(STORVSC_DEVICE));
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if (!storDevice)
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return NULL;
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// Set to 2 to allow both inbound and outbound traffics
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// (ie GetStorDevice() and MustGetStorDevice()) to proceed.
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InterlockedCompareExchange(&storDevice->RefCount, 2, 0);
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storDevice->Device = Device;
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Device->Extension = storDevice;
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return storDevice;
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}
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static inline void FreeStorDevice(STORVSC_DEVICE *Device)
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{
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ASSERT(Device->RefCount == 0);
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MemFree(Device);
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}
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// Get the stordevice object iff exists and its refcount > 1
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static inline STORVSC_DEVICE* GetStorDevice(DEVICE_OBJECT *Device)
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{
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STORVSC_DEVICE *storDevice;
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storDevice = (STORVSC_DEVICE*)Device->Extension;
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if (storDevice && storDevice->RefCount > 1)
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{
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InterlockedIncrement(&storDevice->RefCount);
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}
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else
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{
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storDevice = NULL;
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}
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return storDevice;
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}
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// Get the stordevice object iff exists and its refcount > 0
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static inline STORVSC_DEVICE* MustGetStorDevice(DEVICE_OBJECT *Device)
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{
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STORVSC_DEVICE *storDevice;
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storDevice = (STORVSC_DEVICE*)Device->Extension;
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if (storDevice && storDevice->RefCount)
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{
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InterlockedIncrement(&storDevice->RefCount);
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}
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else
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{
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storDevice = NULL;
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}
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return storDevice;
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}
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static inline void PutStorDevice(DEVICE_OBJECT *Device)
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{
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STORVSC_DEVICE *storDevice;
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storDevice = (STORVSC_DEVICE*)Device->Extension;
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ASSERT(storDevice);
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InterlockedDecrement(&storDevice->RefCount);
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ASSERT(storDevice->RefCount);
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}
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// Drop ref count to 1 to effectively disable GetStorDevice()
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static inline STORVSC_DEVICE* ReleaseStorDevice(DEVICE_OBJECT *Device)
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{
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STORVSC_DEVICE *storDevice;
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storDevice = (STORVSC_DEVICE*)Device->Extension;
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ASSERT(storDevice);
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// Busy wait until the ref drop to 2, then set it to 1
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while (InterlockedCompareExchange(&storDevice->RefCount, 1, 2) != 2)
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{
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Sleep(100);
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}
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return storDevice;
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}
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// Drop ref count to 0. No one can use StorDevice object.
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static inline STORVSC_DEVICE* FinalReleaseStorDevice(DEVICE_OBJECT *Device)
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{
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STORVSC_DEVICE *storDevice;
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storDevice = (STORVSC_DEVICE*)Device->Extension;
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ASSERT(storDevice);
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// Busy wait until the ref drop to 1, then set it to 0
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while (InterlockedCompareExchange(&storDevice->RefCount, 0, 1) != 1)
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{
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Sleep(100);
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}
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Device->Extension = NULL;
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return storDevice;
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}
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/*++;
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Name:
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StorVscInitialize()
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Description:
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Main entry point
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--*/
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int
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StorVscInitialize(
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DRIVER_OBJECT *Driver
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)
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{
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STORVSC_DRIVER_OBJECT* storDriver = (STORVSC_DRIVER_OBJECT*)Driver;
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int ret=0;
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DPRINT_ENTER(STORVSC);
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DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%d sizeof(STORVSC_REQUEST_EXTENSION)=%d sizeof(VSTOR_PACKET)=%d, sizeof(VMSCSI_REQUEST)=%d",
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sizeof(STORVSC_REQUEST), sizeof(STORVSC_REQUEST_EXTENSION), sizeof(VSTOR_PACKET), sizeof(VMSCSI_REQUEST));
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// Make sure we are at least 2 pages since 1 page is used for control
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ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1));
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Driver->name = gDriverName;
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memcpy(&Driver->deviceType, &gStorVscDeviceType, sizeof(GUID));
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storDriver->RequestExtSize = sizeof(STORVSC_REQUEST_EXTENSION);
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// 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)
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// by the max request size (which is VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER + VSTOR_PACKET + UINT64)
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storDriver->MaxOutstandingRequestsPerChannel =
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((storDriver->RingBufferSize - PAGE_SIZE) / ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET + sizeof(VSTOR_PACKET) + sizeof(UINT64),sizeof(UINT64)));
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DPRINT_INFO(STORVSC, "max io %u, currently %u\n", storDriver->MaxOutstandingRequestsPerChannel, STORVSC_MAX_IO_REQUESTS);
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// Setup the dispatch table
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storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd;
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storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove;
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storDriver->Base.OnCleanup = StorVscOnCleanup;
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storDriver->OnIORequest = StorVscOnIORequest;
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storDriver->OnHostReset = StorVscOnHostReset;
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DPRINT_EXIT(STORVSC);
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return ret;
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}
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/*++
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Name:
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StorVscOnDeviceAdd()
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Description:
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Callback when the device belonging to this driver is added
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--*/
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int
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StorVscOnDeviceAdd(
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DEVICE_OBJECT *Device,
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void *AdditionalInfo
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)
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{
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int ret=0;
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STORVSC_DEVICE *storDevice;
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//VMSTORAGE_CHANNEL_PROPERTIES *props;
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STORVSC_DEVICE_INFO *deviceInfo = (STORVSC_DEVICE_INFO*)AdditionalInfo;
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DPRINT_ENTER(STORVSC);
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storDevice = AllocStorDevice(Device);
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if (!storDevice)
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{
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ret = -1;
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goto Cleanup;
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}
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// Save the channel properties to our storvsc channel
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//props = (VMSTORAGE_CHANNEL_PROPERTIES*) channel->offerMsg.Offer.u.Standard.UserDefined;
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// FIXME:
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// If we support more than 1 scsi channel, we need to set the port number here
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// to the scsi channel but how do we get the scsi channel prior to the bus scan
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/*storChannel->PortNumber = 0;
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storChannel->PathId = props->PathId;
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storChannel->TargetId = props->TargetId;*/
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storDevice->PortNumber = deviceInfo->PortNumber;
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// Send it back up
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ret = StorVscConnectToVsp(Device);
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//deviceInfo->PortNumber = storDevice->PortNumber;
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deviceInfo->PathId = storDevice->PathId;
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deviceInfo->TargetId = storDevice->TargetId;
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DPRINT_DBG(STORVSC, "assigned port %u, path %u target %u\n", storDevice->PortNumber, storDevice->PathId, storDevice->TargetId);
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Cleanup:
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DPRINT_EXIT(STORVSC);
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return ret;
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}
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static int StorVscChannelInit(DEVICE_OBJECT *Device)
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{
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int ret=0;
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STORVSC_DEVICE *storDevice;
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STORVSC_REQUEST_EXTENSION *request;
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VSTOR_PACKET *vstorPacket;
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storDevice = GetStorDevice(Device);
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if (!storDevice)
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{
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DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?");
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DPRINT_EXIT(STORVSC);
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return -1;
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}
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request = &storDevice->InitRequest;
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vstorPacket = &request->VStorPacket;
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// Now, initiate the vsc/vsp initialization protocol on the open channel
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memset(request, sizeof(STORVSC_REQUEST_EXTENSION), 0);
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request->WaitEvent = WaitEventCreate();
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vstorPacket->Operation = VStorOperationBeginInitialization;
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
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/*SpinlockAcquire(gDriverExt.packetListLock);
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INSERT_TAIL_LIST(&gDriverExt.packetList, &packet->listEntry.entry);
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SpinlockRelease(gDriverExt.packetListLock);*/
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DPRINT_INFO(STORVSC, "BEGIN_INITIALIZATION_OPERATION...");
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
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vstorPacket,
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sizeof(VSTOR_PACKET),
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(ULONG_PTR)request,
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VmbusPacketTypeDataInBand,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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if ( ret != 0)
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{
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DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION");
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goto Cleanup;
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}
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WaitEventWait(request->WaitEvent);
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if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
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{
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DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
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goto Cleanup;
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}
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DPRINT_INFO(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION...");
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// reuse the packet for version range supported
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memset(vstorPacket, sizeof(VSTOR_PACKET), 0);
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vstorPacket->Operation = VStorOperationQueryProtocolVersion;
|
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
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|
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vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT;
|
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FILL_VMSTOR_REVISION(vstorPacket->Version.Revision);
|
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ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
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vstorPacket,
|
||||
sizeof(VSTOR_PACKET),
|
||||
(ULONG_PTR)request,
|
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VmbusPacketTypeDataInBand,
|
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
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if ( ret != 0)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION");
|
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goto Cleanup;
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}
|
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|
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WaitEventWait(request->WaitEvent);
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|
||||
// TODO: Check returned version
|
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if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
|
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{
|
||||
DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
|
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goto Cleanup;
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}
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|
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// Query channel properties
|
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DPRINT_INFO(STORVSC, "QUERY_PROPERTIES_OPERATION...");
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|
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memset(vstorPacket, sizeof(VSTOR_PACKET), 0);
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vstorPacket->Operation = VStorOperationQueryProperties;
|
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vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
|
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vstorPacket->StorageChannelProperties.PortNumber = storDevice->PortNumber;
|
||||
|
||||
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
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vstorPacket,
|
||||
sizeof(VSTOR_PACKET),
|
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(ULONG_PTR)request,
|
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VmbusPacketTypeDataInBand,
|
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
||||
|
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if ( ret != 0)
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{
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DPRINT_ERR(STORVSC, "unable to send QUERY_PROPERTIES_OPERATION");
|
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goto Cleanup;
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}
|
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|
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WaitEventWait(request->WaitEvent);
|
||||
|
||||
// TODO: Check returned version
|
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if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "QUERY_PROPERTIES_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
|
||||
goto Cleanup;
|
||||
}
|
||||
|
||||
//storDevice->PortNumber = vstorPacket->StorageChannelProperties.PortNumber;
|
||||
storDevice->PathId = vstorPacket->StorageChannelProperties.PathId;
|
||||
storDevice->TargetId = vstorPacket->StorageChannelProperties.TargetId;
|
||||
|
||||
DPRINT_DBG(STORVSC, "channel flag 0x%x, max xfer len 0x%x", vstorPacket->StorageChannelProperties.Flags, vstorPacket->StorageChannelProperties.MaxTransferBytes);
|
||||
|
||||
DPRINT_INFO(STORVSC, "END_INITIALIZATION_OPERATION...");
|
||||
|
||||
memset(vstorPacket, sizeof(VSTOR_PACKET), 0);
|
||||
vstorPacket->Operation = VStorOperationEndInitialization;
|
||||
vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
|
||||
|
||||
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
||||
vstorPacket,
|
||||
sizeof(VSTOR_PACKET),
|
||||
(ULONG_PTR)request,
|
||||
VmbusPacketTypeDataInBand,
|
||||
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
||||
|
||||
if ( ret != 0)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to send END_INITIALIZATION_OPERATION");
|
||||
goto Cleanup;
|
||||
}
|
||||
|
||||
WaitEventWait(request->WaitEvent);
|
||||
|
||||
if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "END_INITIALIZATION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
|
||||
goto Cleanup;
|
||||
}
|
||||
|
||||
DPRINT_INFO(STORVSC, "**** storage channel up and running!! ****");
|
||||
|
||||
Cleanup:
|
||||
if (request->WaitEvent)
|
||||
{
|
||||
WaitEventClose(request->WaitEvent);
|
||||
request->WaitEvent = NULL;
|
||||
}
|
||||
|
||||
PutStorDevice(Device);
|
||||
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
StorVscConnectToVsp(
|
||||
DEVICE_OBJECT *Device
|
||||
)
|
||||
{
|
||||
int ret=0;
|
||||
VMSTORAGE_CHANNEL_PROPERTIES props;
|
||||
|
||||
STORVSC_DRIVER_OBJECT *storDriver = (STORVSC_DRIVER_OBJECT*) Device->Driver;;
|
||||
|
||||
memset(&props, sizeof(VMSTORAGE_CHANNEL_PROPERTIES), 0);
|
||||
|
||||
// Open the channel
|
||||
ret = Device->Driver->VmbusChannelInterface.Open(Device,
|
||||
storDriver->RingBufferSize,
|
||||
storDriver->RingBufferSize,
|
||||
(PVOID)&props,
|
||||
sizeof(VMSTORAGE_CHANNEL_PROPERTIES),
|
||||
StorVscOnChannelCallback,
|
||||
Device
|
||||
);
|
||||
|
||||
DPRINT_DBG(STORVSC, "storage props: path id %d, tgt id %d, max xfer %d", props.PathId, props.TargetId, props.MaxTransferBytes);
|
||||
|
||||
if (ret != 0)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to open channel: %d", ret);
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = StorVscChannelInit(Device);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/*++
|
||||
|
||||
Name:
|
||||
StorVscOnDeviceRemove()
|
||||
|
||||
Description:
|
||||
Callback when the our device is being removed
|
||||
|
||||
--*/
|
||||
int
|
||||
StorVscOnDeviceRemove(
|
||||
DEVICE_OBJECT *Device
|
||||
)
|
||||
{
|
||||
STORVSC_DEVICE *storDevice;
|
||||
int ret=0;
|
||||
|
||||
DPRINT_ENTER(STORVSC);
|
||||
|
||||
DPRINT_INFO(STORVSC, "disabling storage device (%p)...", Device->Extension);
|
||||
|
||||
storDevice = ReleaseStorDevice(Device);
|
||||
|
||||
// At this point, all outbound traffic should be disable. We only allow inbound traffic (responses) to proceed
|
||||
// so that outstanding requests can be completed.
|
||||
while (storDevice->NumOutstandingRequests)
|
||||
{
|
||||
DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", storDevice->NumOutstandingRequests);
|
||||
|
||||
Sleep(100);
|
||||
}
|
||||
|
||||
DPRINT_INFO(STORVSC, "removing storage device (%p)...", Device->Extension);
|
||||
|
||||
storDevice = FinalReleaseStorDevice(Device);
|
||||
|
||||
DPRINT_INFO(STORVSC, "storage device (%p) safe to remove", storDevice);
|
||||
|
||||
// Close the channel
|
||||
Device->Driver->VmbusChannelInterface.Close(Device);
|
||||
|
||||
FreeStorDevice(storDevice);
|
||||
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
//static void
|
||||
//StorVscOnTargetRescan(
|
||||
// void *Context
|
||||
// )
|
||||
//{
|
||||
// DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context;
|
||||
// STORVSC_DRIVER_OBJECT *storDriver;
|
||||
//
|
||||
// DPRINT_ENTER(STORVSC);
|
||||
//
|
||||
// storDriver = (STORVSC_DRIVER_OBJECT*) device->Driver;
|
||||
// storDriver->OnHostRescan(device);
|
||||
//
|
||||
// DPRINT_EXIT(STORVSC);
|
||||
//}
|
||||
|
||||
int
|
||||
StorVscOnHostReset(
|
||||
DEVICE_OBJECT *Device
|
||||
)
|
||||
{
|
||||
int ret=0;
|
||||
|
||||
STORVSC_DEVICE *storDevice;
|
||||
STORVSC_REQUEST_EXTENSION *request;
|
||||
VSTOR_PACKET *vstorPacket;
|
||||
|
||||
DPRINT_ENTER(STORVSC);
|
||||
|
||||
DPRINT_INFO(STORVSC, "resetting host adapter...");
|
||||
|
||||
storDevice = GetStorDevice(Device);
|
||||
if (!storDevice)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?");
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return -1;
|
||||
}
|
||||
|
||||
request = &storDevice->ResetRequest;
|
||||
vstorPacket = &request->VStorPacket;
|
||||
|
||||
request->WaitEvent = WaitEventCreate();
|
||||
|
||||
vstorPacket->Operation = VStorOperationResetBus;
|
||||
vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
|
||||
vstorPacket->VmSrb.PathId = storDevice->PathId;
|
||||
|
||||
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
||||
vstorPacket,
|
||||
sizeof(VSTOR_PACKET),
|
||||
(ULONG_PTR)&storDevice->ResetRequest,
|
||||
VmbusPacketTypeDataInBand,
|
||||
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
||||
if (ret != 0)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "Unable to send reset packet %p ret %d", vstorPacket, ret);
|
||||
goto Cleanup;
|
||||
}
|
||||
|
||||
// FIXME: Add a timeout
|
||||
WaitEventWait(request->WaitEvent);
|
||||
|
||||
WaitEventClose(request->WaitEvent);
|
||||
DPRINT_INFO(STORVSC, "host adapter reset completed");
|
||||
|
||||
// At this point, all outstanding requests in the adapter should have been flushed out and return to us
|
||||
|
||||
Cleanup:
|
||||
PutStorDevice(Device);
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*++
|
||||
|
||||
Name:
|
||||
StorVscOnIORequest()
|
||||
|
||||
Description:
|
||||
Callback to initiate an I/O request
|
||||
|
||||
--*/
|
||||
int
|
||||
StorVscOnIORequest(
|
||||
DEVICE_OBJECT *Device,
|
||||
STORVSC_REQUEST *Request
|
||||
)
|
||||
{
|
||||
STORVSC_DEVICE *storDevice;
|
||||
STORVSC_REQUEST_EXTENSION* requestExtension = (STORVSC_REQUEST_EXTENSION*) Request->Extension;
|
||||
VSTOR_PACKET* vstorPacket =&requestExtension->VStorPacket;
|
||||
int ret=0;
|
||||
|
||||
DPRINT_ENTER(STORVSC);
|
||||
|
||||
storDevice = GetStorDevice(Device);
|
||||
|
||||
DPRINT_DBG(STORVSC, "enter - Device %p, DeviceExt %p, Request %p, Extension %p",
|
||||
Device, storDevice, Request, requestExtension);
|
||||
|
||||
DPRINT_DBG(STORVSC, "req %p len %d bus %d, target %d, lun %d cdblen %d",
|
||||
Request, Request->DataBuffer.Length, Request->Bus, Request->TargetId, Request->LunId, Request->CdbLen);
|
||||
|
||||
if (!storDevice)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?");
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return -2;
|
||||
}
|
||||
|
||||
//PrintBytes(Request->Cdb, Request->CdbLen);
|
||||
|
||||
requestExtension->Request = Request;
|
||||
requestExtension->Device = Device;
|
||||
|
||||
memset(vstorPacket, 0 , sizeof(VSTOR_PACKET));
|
||||
|
||||
vstorPacket->Flags |= REQUEST_COMPLETION_FLAG;
|
||||
|
||||
vstorPacket->VmSrb.Length = sizeof(VMSCSI_REQUEST);
|
||||
|
||||
vstorPacket->VmSrb.PortNumber = Request->Host;
|
||||
vstorPacket->VmSrb.PathId = Request->Bus;
|
||||
vstorPacket->VmSrb.TargetId = Request->TargetId;
|
||||
vstorPacket->VmSrb.Lun = Request->LunId;
|
||||
|
||||
vstorPacket->VmSrb.SenseInfoLength = SENSE_BUFFER_SIZE;
|
||||
|
||||
// Copy over the scsi command descriptor block
|
||||
vstorPacket->VmSrb.CdbLength = Request->CdbLen;
|
||||
memcpy(&vstorPacket->VmSrb.Cdb, Request->Cdb, Request->CdbLen);
|
||||
|
||||
vstorPacket->VmSrb.DataIn = Request->Type;
|
||||
vstorPacket->VmSrb.DataTransferLength = Request->DataBuffer.Length;
|
||||
|
||||
vstorPacket->Operation = VStorOperationExecuteSRB;
|
||||
|
||||
DPRINT_DBG(STORVSC, "srb - len %d port %d, path %d, target %d, lun %d senselen %d cdblen %d",
|
||||
vstorPacket->VmSrb.Length,
|
||||
vstorPacket->VmSrb.PortNumber,
|
||||
vstorPacket->VmSrb.PathId,
|
||||
vstorPacket->VmSrb.TargetId,
|
||||
vstorPacket->VmSrb.Lun,
|
||||
vstorPacket->VmSrb.SenseInfoLength,
|
||||
vstorPacket->VmSrb.CdbLength);
|
||||
|
||||
if (requestExtension->Request->DataBuffer.Length)
|
||||
{
|
||||
ret = Device->Driver->VmbusChannelInterface.SendPacketMultiPageBuffer(Device,
|
||||
&requestExtension->Request->DataBuffer,
|
||||
vstorPacket,
|
||||
sizeof(VSTOR_PACKET),
|
||||
(ULONG_PTR)requestExtension);
|
||||
}
|
||||
else
|
||||
{
|
||||
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
|
||||
vstorPacket,
|
||||
sizeof(VSTOR_PACKET),
|
||||
(ULONG_PTR)requestExtension,
|
||||
VmbusPacketTypeDataInBand,
|
||||
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
|
||||
}
|
||||
|
||||
if (ret != 0)
|
||||
{
|
||||
DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d", vstorPacket, ret);
|
||||
}
|
||||
|
||||
InterlockedIncrement(&storDevice->NumOutstandingRequests);
|
||||
|
||||
PutStorDevice(Device);
|
||||
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*++
|
||||
|
||||
Name:
|
||||
StorVscOnCleanup()
|
||||
|
||||
Description:
|
||||
Perform any cleanup when the driver is removed
|
||||
|
||||
--*/
|
||||
void
|
||||
StorVscOnCleanup(
|
||||
DRIVER_OBJECT *Driver
|
||||
)
|
||||
{
|
||||
DPRINT_ENTER(STORVSC);
|
||||
DPRINT_EXIT(STORVSC);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
StorVscOnIOCompletion(
|
||||
DEVICE_OBJECT *Device,
|
||||
VSTOR_PACKET *VStorPacket,
|
||||
STORVSC_REQUEST_EXTENSION *RequestExt
|
||||
)
|
||||
{
|
||||
STORVSC_REQUEST *request;
|
||||
STORVSC_DEVICE *storDevice;
|
||||
|
||||
DPRINT_ENTER(STORVSC);
|
||||
|
||||
storDevice = MustGetStorDevice(Device);
|
||||
if (!storDevice)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?");
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return;
|
||||
}
|
||||
|
||||
DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION - request extension %p completed bytes xfer %u",
|
||||
RequestExt, VStorPacket->VmSrb.DataTransferLength);
|
||||
|
||||
ASSERT(RequestExt != NULL);
|
||||
ASSERT(RequestExt->Request != NULL);
|
||||
|
||||
request = RequestExt->Request;
|
||||
|
||||
ASSERT(request->OnIOCompletion != NULL);
|
||||
|
||||
// Copy over the status...etc
|
||||
request->Status = VStorPacket->VmSrb.ScsiStatus;
|
||||
|
||||
if (request->Status != 0 || VStorPacket->VmSrb.SrbStatus != 1)
|
||||
{
|
||||
DPRINT_WARN(STORVSC, "cmd 0x%x scsi status 0x%x srb status 0x%x\n",
|
||||
request->Cdb[0],
|
||||
VStorPacket->VmSrb.ScsiStatus,
|
||||
VStorPacket->VmSrb.SrbStatus);
|
||||
}
|
||||
|
||||
if ((request->Status & 0xFF) == 0x02) // CHECK_CONDITION
|
||||
{
|
||||
if (VStorPacket->VmSrb.SrbStatus & 0x80) // autosense data available
|
||||
{
|
||||
DPRINT_WARN(STORVSC, "storvsc pkt %p autosense data valid - len %d\n",
|
||||
RequestExt, VStorPacket->VmSrb.SenseInfoLength);
|
||||
|
||||
ASSERT(VStorPacket->VmSrb.SenseInfoLength <= request->SenseBufferSize);
|
||||
memcpy(request->SenseBuffer,
|
||||
VStorPacket->VmSrb.SenseData,
|
||||
VStorPacket->VmSrb.SenseInfoLength);
|
||||
|
||||
request->SenseBufferSize = VStorPacket->VmSrb.SenseInfoLength;
|
||||
}
|
||||
}
|
||||
|
||||
// TODO:
|
||||
request->BytesXfer = VStorPacket->VmSrb.DataTransferLength;
|
||||
|
||||
request->OnIOCompletion(request);
|
||||
|
||||
InterlockedDecrement(&storDevice->NumOutstandingRequests);
|
||||
|
||||
PutStorDevice(Device);
|
||||
|
||||
DPRINT_EXIT(STORVSC);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
StorVscOnReceive(
|
||||
DEVICE_OBJECT *Device,
|
||||
VSTOR_PACKET *VStorPacket,
|
||||
STORVSC_REQUEST_EXTENSION *RequestExt
|
||||
)
|
||||
{
|
||||
switch(VStorPacket->Operation)
|
||||
{
|
||||
case VStorOperationCompleteIo:
|
||||
|
||||
DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION");
|
||||
StorVscOnIOCompletion(Device, VStorPacket, RequestExt);
|
||||
break;
|
||||
|
||||
//case ENUMERATE_DEVICE_OPERATION:
|
||||
|
||||
// DPRINT_INFO(STORVSC, "ENUMERATE_DEVICE_OPERATION");
|
||||
|
||||
// StorVscOnTargetRescan(Device);
|
||||
// break;
|
||||
|
||||
case VStorOperationRemoveDevice:
|
||||
|
||||
DPRINT_INFO(STORVSC, "REMOVE_DEVICE_OPERATION");
|
||||
// TODO:
|
||||
break;
|
||||
|
||||
default:
|
||||
DPRINT_INFO(STORVSC, "Unknown operation received - %d", VStorPacket->Operation);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
StorVscOnChannelCallback(
|
||||
PVOID Context
|
||||
)
|
||||
{
|
||||
int ret=0;
|
||||
DEVICE_OBJECT *device = (DEVICE_OBJECT*)Context;
|
||||
STORVSC_DEVICE *storDevice;
|
||||
UINT32 bytesRecvd;
|
||||
UINT64 requestId;
|
||||
UCHAR packet[ALIGN_UP(sizeof(VSTOR_PACKET),8)];
|
||||
STORVSC_REQUEST_EXTENSION *request;
|
||||
|
||||
DPRINT_ENTER(STORVSC);
|
||||
|
||||
ASSERT(device);
|
||||
|
||||
storDevice = MustGetStorDevice(device);
|
||||
if (!storDevice)
|
||||
{
|
||||
DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?");
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return;
|
||||
}
|
||||
|
||||
do
|
||||
{
|
||||
ret = device->Driver->VmbusChannelInterface.RecvPacket(device,
|
||||
packet,
|
||||
ALIGN_UP(sizeof(VSTOR_PACKET),8),
|
||||
&bytesRecvd,
|
||||
&requestId);
|
||||
if (ret == 0 && bytesRecvd > 0)
|
||||
{
|
||||
DPRINT_DBG(STORVSC, "receive %d bytes - tid %llx", bytesRecvd, requestId);
|
||||
|
||||
//ASSERT(bytesRecvd == sizeof(VSTOR_PACKET));
|
||||
|
||||
request = (STORVSC_REQUEST_EXTENSION*)(ULONG_PTR)requestId;
|
||||
ASSERT(request);
|
||||
|
||||
//if (vstorPacket.Flags & SYNTHETIC_FLAG)
|
||||
if ((request == &storDevice->InitRequest) || (request == &storDevice->ResetRequest))
|
||||
{
|
||||
//DPRINT_INFO(STORVSC, "reset completion - operation %u status %u", vstorPacket.Operation, vstorPacket.Status);
|
||||
|
||||
memcpy(&request->VStorPacket, packet, sizeof(VSTOR_PACKET));
|
||||
|
||||
WaitEventSet(request->WaitEvent);
|
||||
}
|
||||
else
|
||||
{
|
||||
StorVscOnReceive(device, (VSTOR_PACKET*)packet, request);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
//DPRINT_DBG(STORVSC, "nothing else to read...");
|
||||
break;
|
||||
}
|
||||
} while (1);
|
||||
|
||||
PutStorDevice(device);
|
||||
|
||||
DPRINT_EXIT(STORVSC);
|
||||
return;
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue