/*
- *
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
- *
*/
-
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include "osd.h"
-#include "include/logging.h"
-#include "include/StorVscApi.h"
-#include "include/VmbusPacketFormat.h"
+#include "logging.h"
+#include "StorVscApi.h"
+#include "VmbusPacketFormat.h"
#include "vstorage.h"
-
-/* #defines */
-
-
-
-/* Data types */
-
-
-typedef struct _STORVSC_REQUEST_EXTENSION {
- /* LIST_ENTRY ListEntry; */
+struct storvsc_request_extension {
+ /* LIST_ENTRY ListEntry; */
struct hv_storvsc_request *Request;
struct hv_device *Device;
/* Synchronize the request/response if needed */
struct osd_waitevent *WaitEvent;
- VSTOR_PACKET VStorPacket;
-} STORVSC_REQUEST_EXTENSION;
-
+ struct vstor_packet VStorPacket;
+};
/* A storvsc device is a device object that contains a vmbus channel */
-typedef struct _STORVSC_DEVICE{
+struct storvsc_device {
struct hv_device *Device;
- atomic_t RefCount; /* 0 indicates the device is being destroyed */
+ /* 0 indicates the device is being destroyed */
+ atomic_t RefCount;
atomic_t NumOutstandingRequests;
* controller. In reality, the pathid, targetid is always 0
* and the port is set by us
*/
- unsigned int PortNumber;
- unsigned char PathId;
- unsigned char TargetId;
+ unsigned int PortNumber;
+ unsigned char PathId;
+ unsigned char TargetId;
- /* LIST_ENTRY OutstandingRequestList; */
- /* HANDLE OutstandingRequestLock; */
+ /* LIST_ENTRY OutstandingRequestList; */
+ /* HANDLE OutstandingRequestLock; */
/* Used for vsc/vsp channel reset process */
- STORVSC_REQUEST_EXTENSION InitRequest;
-
- STORVSC_REQUEST_EXTENSION ResetRequest;
-
-} STORVSC_DEVICE;
-
-
+ struct storvsc_request_extension InitRequest;
+ struct storvsc_request_extension ResetRequest;
+};
-/* Globals */
-static const char* gDriverName="storvsc";
+static const char *gDriverName = "storvsc";
/* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
static const struct hv_guid gStorVscDeviceType = {
};
-/* Internal routines */
-
-static int
-StorVscOnDeviceAdd(
- struct hv_device *Device,
- void *AdditionalInfo
- );
-
-static int
-StorVscOnDeviceRemove(
- struct hv_device *Device
- );
-
-static int
-StorVscOnIORequest(
- struct hv_device *Device,
- struct hv_storvsc_request *Request
- );
-
-static int
-StorVscOnHostReset(
- struct hv_device *Device
- );
-
-static void
-StorVscOnCleanup(
- struct hv_driver *Device
- );
-
-static void
-StorVscOnChannelCallback(
- void * Context
- );
-
-static void
-StorVscOnIOCompletion(
- struct hv_device *Device,
- VSTOR_PACKET *VStorPacket,
- STORVSC_REQUEST_EXTENSION *RequestExt
- );
-
-static void
-StorVscOnReceive(
- struct hv_device *Device,
- VSTOR_PACKET *VStorPacket,
- STORVSC_REQUEST_EXTENSION *RequestExt
- );
-
-static int
-StorVscConnectToVsp(
- struct hv_device *Device
- );
-
-static inline STORVSC_DEVICE* AllocStorDevice(struct hv_device *Device)
+static inline struct storvsc_device *AllocStorDevice(struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
+ struct storvsc_device *storDevice;
- storDevice = kzalloc(sizeof(STORVSC_DEVICE), GFP_KERNEL);
+ storDevice = kzalloc(sizeof(struct storvsc_device), GFP_KERNEL);
if (!storDevice)
return NULL;
return storDevice;
}
-static inline void FreeStorDevice(STORVSC_DEVICE *Device)
+static inline void FreeStorDevice(struct storvsc_device *Device)
{
- ASSERT( atomic_read(&Device->RefCount) == 0);
+ ASSERT(atomic_read(&Device->RefCount) == 0);
kfree(Device);
}
/* Get the stordevice object iff exists and its refcount > 1 */
-static inline STORVSC_DEVICE* GetStorDevice(struct hv_device *Device)
+static inline struct storvsc_device *GetStorDevice(struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
+ struct storvsc_device *storDevice;
- storDevice = (STORVSC_DEVICE*)Device->Extension;
+ storDevice = (struct storvsc_device *)Device->Extension;
if (storDevice && atomic_read(&storDevice->RefCount) > 1)
atomic_inc(&storDevice->RefCount);
else
}
/* Get the stordevice object iff exists and its refcount > 0 */
-static inline STORVSC_DEVICE* MustGetStorDevice(struct hv_device *Device)
+static inline struct storvsc_device *MustGetStorDevice(struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
+ struct storvsc_device *storDevice;
- storDevice = (STORVSC_DEVICE*)Device->Extension;
+ storDevice = (struct storvsc_device *)Device->Extension;
if (storDevice && atomic_read(&storDevice->RefCount))
atomic_inc(&storDevice->RefCount);
else
static inline void PutStorDevice(struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
+ struct storvsc_device *storDevice;
- storDevice = (STORVSC_DEVICE*)Device->Extension;
+ storDevice = (struct storvsc_device *)Device->Extension;
ASSERT(storDevice);
atomic_dec(&storDevice->RefCount);
}
/* Drop ref count to 1 to effectively disable GetStorDevice() */
-static inline STORVSC_DEVICE* ReleaseStorDevice(struct hv_device *Device)
+static inline struct storvsc_device *ReleaseStorDevice(struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
+ struct storvsc_device *storDevice;
- storDevice = (STORVSC_DEVICE*)Device->Extension;
+ storDevice = (struct storvsc_device *)Device->Extension;
ASSERT(storDevice);
/* Busy wait until the ref drop to 2, then set it to 1 */
while (atomic_cmpxchg(&storDevice->RefCount, 2, 1) != 2)
- {
udelay(100);
- }
return storDevice;
}
/* Drop ref count to 0. No one can use StorDevice object. */
-static inline STORVSC_DEVICE* FinalReleaseStorDevice(struct hv_device *Device)
+static inline struct storvsc_device *FinalReleaseStorDevice(
+ struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
+ struct storvsc_device *storDevice;
- storDevice = (STORVSC_DEVICE*)Device->Extension;
+ storDevice = (struct storvsc_device *)Device->Extension;
ASSERT(storDevice);
/* Busy wait until the ref drop to 1, then set it to 0 */
while (atomic_cmpxchg(&storDevice->RefCount, 1, 0) != 1)
- {
udelay(100);
- }
Device->Extension = NULL;
return storDevice;
}
-/*++;
-
-
-Name:
- StorVscInitialize()
-
-Description:
- Main entry point
-
---*/
-int
-StorVscInitialize(
- struct hv_driver *Driver
- )
-{
- STORVSC_DRIVER_OBJECT* storDriver = (STORVSC_DRIVER_OBJECT*)Driver;
- int ret=0;
-
- DPRINT_ENTER(STORVSC);
-
- DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%zd sizeof(STORVSC_REQUEST_EXTENSION)=%zd sizeof(VSTOR_PACKET)=%zd, sizeof(VMSCSI_REQUEST)=%zd",
- sizeof(struct hv_storvsc_request), sizeof(STORVSC_REQUEST_EXTENSION), sizeof(VSTOR_PACKET), sizeof(VMSCSI_REQUEST));
-
- /* Make sure we are at least 2 pages since 1 page is used for control */
- ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1));
-
- Driver->name = gDriverName;
- memcpy(&Driver->deviceType, &gStorVscDeviceType, sizeof(struct hv_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(STORVSC, "max io %u, currently %u\n", storDriver->MaxOutstandingRequestsPerChannel, STORVSC_MAX_IO_REQUESTS);
-
- /* Setup the dispatch table */
- storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd;
- storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove;
- storDriver->Base.OnCleanup = StorVscOnCleanup;
-
- storDriver->OnIORequest = StorVscOnIORequest;
- storDriver->OnHostReset = StorVscOnHostReset;
-
- DPRINT_EXIT(STORVSC);
-
- return ret;
-}
-
-/*++
-
-Name:
- StorVscOnDeviceAdd()
-
-Description:
- Callback when the device belonging to this driver is added
-
---*/
-static int
-StorVscOnDeviceAdd(
- struct hv_device *Device,
- void *AdditionalInfo
- )
-{
- int ret=0;
- STORVSC_DEVICE *storDevice;
- /* VMSTORAGE_CHANNEL_PROPERTIES *props; */
- STORVSC_DEVICE_INFO *deviceInfo = (STORVSC_DEVICE_INFO*)AdditionalInfo;
-
- DPRINT_ENTER(STORVSC);
-
- storDevice = AllocStorDevice(Device);
- if (!storDevice)
- {
- ret = -1;
- goto Cleanup;
- }
-
- /* Save the channel properties to our storvsc channel */
- /* props = (VMSTORAGE_CHANNEL_PROPERTIES*) channel->offerMsg.Offer.u.Standard.UserDefined; */
-
- /* FIXME: */
- /*
- * If we support more than 1 scsi channel, we need to set the
- * port number here to the scsi channel but how do we get the
- * scsi channel prior to the bus scan
- */
-
- /* storChannel->PortNumber = 0;
- storChannel->PathId = props->PathId;
- storChannel->TargetId = props->TargetId; */
-
- storDevice->PortNumber = deviceInfo->PortNumber;
- /* Send it back up */
- ret = StorVscConnectToVsp(Device);
-
- /* deviceInfo->PortNumber = storDevice->PortNumber; */
- deviceInfo->PathId = storDevice->PathId;
- deviceInfo->TargetId = storDevice->TargetId;
-
- DPRINT_DBG(STORVSC, "assigned port %u, path %u target %u\n", storDevice->PortNumber, storDevice->PathId, storDevice->TargetId);
-
-Cleanup:
- DPRINT_EXIT(STORVSC);
-
- return ret;
-}
-
static int StorVscChannelInit(struct hv_device *Device)
{
- int ret=0;
- STORVSC_DEVICE *storDevice;
- STORVSC_REQUEST_EXTENSION *request;
- VSTOR_PACKET *vstorPacket;
+ struct storvsc_device *storDevice;
+ struct storvsc_request_extension *request;
+ struct vstor_packet *vstorPacket;
+ int ret;
storDevice = GetStorDevice(Device);
- if (!storDevice)
- {
- DPRINT_ERR(STORVSC, "unable to get stor device...device being destroyed?");
+ if (!storDevice) {
+ DPRINT_ERR(STORVSC, "unable to get stor device..."
+ "device being destroyed?");
DPRINT_EXIT(STORVSC);
return -1;
}
request = &storDevice->InitRequest;
vstorPacket = &request->VStorPacket;
- /* Now, initiate the vsc/vsp initialization protocol on the open channel */
-
- memset(request, sizeof(STORVSC_REQUEST_EXTENSION), 0);
+ /*
+ * Now, initiate the vsc/vsp initialization protocol on the open
+ * channel
+ */
+ memset(request, 0, sizeof(struct storvsc_request_extension));
request->WaitEvent = osd_WaitEventCreate();
vstorPacket->Operation = VStorOperationBeginInitialization;
DPRINT_INFO(STORVSC, "BEGIN_INITIALIZATION_OPERATION...");
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
- vstorPacket,
- sizeof(VSTOR_PACKET),
- (unsigned long)request,
- VmbusPacketTypeDataInBand,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
- if ( ret != 0)
- {
- DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION");
+ vstorPacket,
+ sizeof(struct vstor_packet),
+ (unsigned long)request,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ if (ret != 0) {
+ DPRINT_ERR(STORVSC,
+ "unable to send BEGIN_INITIALIZATION_OPERATION");
goto Cleanup;
}
osd_WaitEventWait(request->WaitEvent);
- if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
- {
- DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
+ if (vstorPacket->Operation != VStorOperationCompleteIo ||
+ vstorPacket->Status != 0) {
+ DPRINT_ERR(STORVSC, "BEGIN_INITIALIZATION_OPERATION failed "
+ "(op %d status 0x%x)",
+ vstorPacket->Operation, vstorPacket->Status);
goto Cleanup;
}
DPRINT_INFO(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION...");
/* reuse the packet for version range supported */
- memset(vstorPacket, sizeof(VSTOR_PACKET), 0);
+ memset(vstorPacket, 0, sizeof(struct vstor_packet));
vstorPacket->Operation = VStorOperationQueryProtocolVersion;
vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
- vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT;
- FILL_VMSTOR_REVISION(vstorPacket->Version.Revision);
+ vstorPacket->Version.MajorMinor = VMSTOR_PROTOCOL_VERSION_CURRENT;
+ FILL_VMSTOR_REVISION(vstorPacket->Version.Revision);
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
- vstorPacket,
- sizeof(VSTOR_PACKET),
- (unsigned long)request,
- VmbusPacketTypeDataInBand,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
- if ( ret != 0)
- {
- DPRINT_ERR(STORVSC, "unable to send BEGIN_INITIALIZATION_OPERATION");
+ vstorPacket,
+ sizeof(struct vstor_packet),
+ (unsigned long)request,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ if (ret != 0) {
+ DPRINT_ERR(STORVSC,
+ "unable to send BEGIN_INITIALIZATION_OPERATION");
goto Cleanup;
}
osd_WaitEventWait(request->WaitEvent);
/* TODO: Check returned version */
- if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
- {
- DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
+ if (vstorPacket->Operation != VStorOperationCompleteIo ||
+ vstorPacket->Status != 0) {
+ DPRINT_ERR(STORVSC, "QUERY_PROTOCOL_VERSION_OPERATION failed "
+ "(op %d status 0x%x)",
+ vstorPacket->Operation, vstorPacket->Status);
goto Cleanup;
}
/* Query channel properties */
DPRINT_INFO(STORVSC, "QUERY_PROPERTIES_OPERATION...");
- memset(vstorPacket, sizeof(VSTOR_PACKET), 0);
- vstorPacket->Operation = VStorOperationQueryProperties;
+ memset(vstorPacket, 0, sizeof(struct vstor_packet));
+ vstorPacket->Operation = VStorOperationQueryProperties;
vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
- vstorPacket->StorageChannelProperties.PortNumber = storDevice->PortNumber;
+ vstorPacket->StorageChannelProperties.PortNumber =
+ storDevice->PortNumber;
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
- vstorPacket,
- sizeof(VSTOR_PACKET),
- (unsigned long)request,
- VmbusPacketTypeDataInBand,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
-
- if ( ret != 0)
- {
- DPRINT_ERR(STORVSC, "unable to send QUERY_PROPERTIES_OPERATION");
+ vstorPacket,
+ sizeof(struct vstor_packet),
+ (unsigned long)request,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+
+ if (ret != 0) {
+ DPRINT_ERR(STORVSC,
+ "unable to send QUERY_PROPERTIES_OPERATION");
goto Cleanup;
}
osd_WaitEventWait(request->WaitEvent);
/* TODO: Check returned version */
- if (vstorPacket->Operation != VStorOperationCompleteIo || vstorPacket->Status != 0)
- {
- DPRINT_ERR(STORVSC, "QUERY_PROPERTIES_OPERATION failed (op %d status 0x%x)", vstorPacket->Operation, vstorPacket->Status);
+ 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_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;
+ memset(vstorPacket, 0, sizeof(struct vstor_packet));
+ vstorPacket->Operation = VStorOperationEndInitialization;
vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
- vstorPacket,
- sizeof(VSTOR_PACKET),
- (unsigned long)request,
- VmbusPacketTypeDataInBand,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
-
- if ( ret != 0)
- {
- DPRINT_ERR(STORVSC, "unable to send END_INITIALIZATION_OPERATION");
+ vstorPacket,
+ sizeof(struct vstor_packet),
+ (unsigned long)request,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+
+ if (ret != 0) {
+ DPRINT_ERR(STORVSC,
+ "unable to send END_INITIALIZATION_OPERATION");
goto Cleanup;
}
osd_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);
+ 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)
- {
- kfree(request->WaitEvent);
- request->WaitEvent = NULL;
- }
+ kfree(request->WaitEvent);
+ request->WaitEvent = NULL;
PutStorDevice(Device);
return ret;
}
+static void StorVscOnIOCompletion(struct hv_device *Device,
+ struct vstor_packet *VStorPacket,
+ struct storvsc_request_extension *RequestExt)
+{
+ struct hv_storvsc_request *request;
+ struct 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);
+
+ atomic_dec(&storDevice->NumOutstandingRequests);
+
+ PutStorDevice(Device);
+
+ DPRINT_EXIT(STORVSC);
+}
+
+static void StorVscOnReceive(struct hv_device *Device,
+ struct vstor_packet *VStorPacket,
+ struct storvsc_request_extension *RequestExt)
+{
+ switch (VStorPacket->Operation) {
+ case VStorOperationCompleteIo:
+ DPRINT_DBG(STORVSC, "IO_COMPLETE_OPERATION");
+ StorVscOnIOCompletion(Device, VStorPacket, RequestExt);
+ break;
+ case VStorOperationRemoveDevice:
+ DPRINT_INFO(STORVSC, "REMOVE_DEVICE_OPERATION");
+ /* TODO: */
+ break;
+
+ default:
+ DPRINT_INFO(STORVSC, "Unknown operation received - %d",
+ VStorPacket->Operation);
+ break;
+ }
+}
-static int
-StorVscConnectToVsp(
- struct hv_device *Device
- )
+static void StorVscOnChannelCallback(void *context)
{
- int ret=0;
- VMSTORAGE_CHANNEL_PROPERTIES props;
+ struct hv_device *device = (struct hv_device *)context;
+ struct storvsc_device *storDevice;
+ u32 bytesRecvd;
+ u64 requestId;
+ unsigned char packet[ALIGN_UP(sizeof(struct vstor_packet), 8)];
+ struct storvsc_request_extension *request;
+ int ret;
+
+ 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(struct vstor_packet), 8),
+ &bytesRecvd, &requestId);
+ if (ret == 0 && bytesRecvd > 0) {
+ DPRINT_DBG(STORVSC, "receive %d bytes - tid %llx",
+ bytesRecvd, requestId);
+
+ /* ASSERT(bytesRecvd == sizeof(struct vstor_packet)); */
+
+ request = (struct storvsc_request_extension *)
+ (unsigned long)requestId;
+ ASSERT(request);
- STORVSC_DRIVER_OBJECT *storDriver = (STORVSC_DRIVER_OBJECT*) Device->Driver;;
+ /* 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); */
- memset(&props, sizeof(VMSTORAGE_CHANNEL_PROPERTIES), 0);
+ memcpy(&request->VStorPacket, packet,
+ sizeof(struct vstor_packet));
+
+ osd_WaitEventSet(request->WaitEvent);
+ } else {
+ StorVscOnReceive(device,
+ (struct vstor_packet *)packet,
+ request);
+ }
+ } else {
+ /* DPRINT_DBG(STORVSC, "nothing else to read..."); */
+ break;
+ }
+ } while (1);
+
+ PutStorDevice(device);
+
+ DPRINT_EXIT(STORVSC);
+ return;
+}
+
+static int StorVscConnectToVsp(struct hv_device *Device)
+{
+ struct vmstorage_channel_properties props;
+ struct storvsc_driver_object *storDriver;
+ int ret;
+
+ storDriver = (struct storvsc_driver_object *)Device->Driver;
+ memset(&props, 0, sizeof(struct vmstorage_channel_properties));
/* Open the channel */
ret = Device->Driver->VmbusChannelInterface.Open(Device,
- storDriver->RingBufferSize,
- storDriver->RingBufferSize,
- (void *)&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)
- {
+ storDriver->RingBufferSize,
+ storDriver->RingBufferSize,
+ (void *)&props,
+ sizeof(struct 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;
}
return ret;
}
+/**
+ * StorVscOnDeviceAdd - Callback when the device belonging to this driver is added
+ */
+static int StorVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo)
+{
+ struct storvsc_device *storDevice;
+ /* struct vmstorage_channel_properties *props; */
+ struct storvsc_device_info *deviceInfo;
+ int ret = 0;
+
+ DPRINT_ENTER(STORVSC);
+
+ deviceInfo = (struct storvsc_device_info *)AdditionalInfo;
+ storDevice = AllocStorDevice(Device);
+ if (!storDevice) {
+ ret = -1;
+ goto Cleanup;
+ }
+
+ /* Save the channel properties to our storvsc channel */
+ /* props = (struct vmstorage_channel_properties *)
+ * channel->offerMsg.Offer.u.Standard.UserDefined; */
+
+ /* FIXME: */
+ /*
+ * If we support more than 1 scsi channel, we need to set the
+ * port number here to the scsi channel but how do we get the
+ * scsi channel prior to the bus scan
+ */
+
+ /* storChannel->PortNumber = 0;
+ storChannel->PathId = props->PathId;
+ storChannel->TargetId = props->TargetId; */
+
+ storDevice->PortNumber = deviceInfo->PortNumber;
+ /* Send it back up */
+ ret = StorVscConnectToVsp(Device);
+
+ /* deviceInfo->PortNumber = storDevice->PortNumber; */
+ deviceInfo->PathId = storDevice->PathId;
+ deviceInfo->TargetId = storDevice->TargetId;
-/*++
+ DPRINT_DBG(STORVSC, "assigned port %u, path %u target %u\n",
+ storDevice->PortNumber, storDevice->PathId,
+ storDevice->TargetId);
-Name:
- StorVscOnDeviceRemove()
+Cleanup:
+ DPRINT_EXIT(STORVSC);
-Description:
- Callback when the our device is being removed
+ return ret;
+}
---*/
-static int
-StorVscOnDeviceRemove(
- struct hv_device *Device
- )
+/**
+ * StorVscOnDeviceRemove - Callback when the our device is being removed
+ */
+static int StorVscOnDeviceRemove(struct hv_device *Device)
{
- STORVSC_DEVICE *storDevice;
- int ret=0;
+ struct storvsc_device *storDevice;
DPRINT_ENTER(STORVSC);
- DPRINT_INFO(STORVSC, "disabling storage device (%p)...", Device->Extension);
+ DPRINT_INFO(STORVSC, "disabling storage device (%p)...",
+ Device->Extension);
storDevice = ReleaseStorDevice(Device);
* only allow inbound traffic (responses) to proceed so that
* outstanding requests can be completed.
*/
- while (atomic_read(&storDevice->NumOutstandingRequests))
- {
- DPRINT_INFO(STORVSC, "waiting for %d requests to complete...", atomic_read(&storDevice->NumOutstandingRequests));
-
+ while (atomic_read(&storDevice->NumOutstandingRequests)) {
+ DPRINT_INFO(STORVSC, "waiting for %d requests to complete...",
+ atomic_read(&storDevice->NumOutstandingRequests));
udelay(100);
}
- DPRINT_INFO(STORVSC, "removing storage device (%p)...", Device->Extension);
+ DPRINT_INFO(STORVSC, "removing storage device (%p)...",
+ Device->Extension);
storDevice = FinalReleaseStorDevice(Device);
FreeStorDevice(storDevice);
DPRINT_EXIT(STORVSC);
- return ret;
+ return 0;
}
-/* ***************
-static void
-StorVscOnTargetRescan(
-void *Context
-)
+static int StorVscOnHostReset(struct hv_device *Device)
{
-struct hv_device *device=(struct hv_device *)Context;
-STORVSC_DRIVER_OBJECT *storDriver;
-
-DPRINT_ENTER(STORVSC);
-
-storDriver = (STORVSC_DRIVER_OBJECT*) device->Driver;
-storDriver->OnHostRescan(device);
-
-DPRINT_EXIT(STORVSC);
-}
-*********** */
-
-static int
-StorVscOnHostReset(
- struct hv_device *Device
- )
-{
- int ret=0;
-
- STORVSC_DEVICE *storDevice;
- STORVSC_REQUEST_EXTENSION *request;
- VSTOR_PACKET *vstorPacket;
+ struct storvsc_device *storDevice;
+ struct storvsc_request_extension *request;
+ struct vstor_packet *vstorPacket;
+ int ret;
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?");
+ if (!storDevice) {
+ DPRINT_ERR(STORVSC, "unable to get stor device..."
+ "device being destroyed?");
DPRINT_EXIT(STORVSC);
return -1;
}
request->WaitEvent = osd_WaitEventCreate();
- vstorPacket->Operation = VStorOperationResetBus;
- vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
- vstorPacket->VmSrb.PathId = storDevice->PathId;
+ vstorPacket->Operation = VStorOperationResetBus;
+ vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
+ vstorPacket->VmSrb.PathId = storDevice->PathId;
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
- vstorPacket,
- sizeof(VSTOR_PACKET),
- (unsigned long)&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);
+ vstorPacket,
+ sizeof(struct vstor_packet),
+ (unsigned long)&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;
}
return ret;
}
-/*++
-
-Name:
- StorVscOnIORequest()
-
-Description:
- Callback to initiate an I/O request
-
---*/
-static int
-StorVscOnIORequest(
- struct hv_device *Device,
- struct hv_storvsc_request *Request
- )
+/**
+ * StorVscOnIORequest - Callback to initiate an I/O request
+ */
+static int StorVscOnIORequest(struct hv_device *Device,
+ struct hv_storvsc_request *Request)
{
- STORVSC_DEVICE *storDevice;
- STORVSC_REQUEST_EXTENSION* requestExtension = (STORVSC_REQUEST_EXTENSION*) Request->Extension;
- VSTOR_PACKET* vstorPacket =&requestExtension->VStorPacket;
- int ret=0;
+ struct storvsc_device *storDevice;
+ struct storvsc_request_extension *requestExtension;
+ struct vstor_packet *vstorPacket;
+ int ret = 0;
DPRINT_ENTER(STORVSC);
+ requestExtension =
+ (struct storvsc_request_extension *)Request->Extension;
+ vstorPacket = &requestExtension->VStorPacket;
storDevice = GetStorDevice(Device);
- DPRINT_DBG(STORVSC, "enter - Device %p, DeviceExt %p, Request %p, Extension %p",
- Device, storDevice, Request, requestExtension);
+ 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);
+ 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?");
+ if (!storDevice) {
+ DPRINT_ERR(STORVSC, "unable to get stor device..."
+ "device being destroyed?");
DPRINT_EXIT(STORVSC);
return -2;
}
- /* print_hex_dump_bytes("", DUMP_PREFIX_NONE, Request->Cdb, Request->CdbLen); */
+ /* print_hex_dump_bytes("", DUMP_PREFIX_NONE, Request->Cdb,
+ * Request->CdbLen); */
requestExtension->Request = Request;
requestExtension->Device = Device;
- memset(vstorPacket, 0 , sizeof(VSTOR_PACKET));
+ memset(vstorPacket, 0 , sizeof(struct vstor_packet));
vstorPacket->Flags |= REQUEST_COMPLETION_FLAG;
- vstorPacket->VmSrb.Length = sizeof(VMSCSI_REQUEST);
+ vstorPacket->VmSrb.Length = sizeof(struct vmscsi_request);
vstorPacket->VmSrb.PortNumber = Request->Host;
- vstorPacket->VmSrb.PathId = Request->Bus;
- vstorPacket->VmSrb.TargetId = Request->TargetId;
- vstorPacket->VmSrb.Lun = Request->LunId;
+ 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;
+ vstorPacket->VmSrb.CdbLength = Request->CdbLen;
memcpy(&vstorPacket->VmSrb.Cdb, Request->Cdb, Request->CdbLen);
vstorPacket->VmSrb.DataIn = Request->Type;
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,
+ 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),
+ sizeof(struct vstor_packet),
(unsigned long)requestExtension);
- }
- else
- {
+ } else {
ret = Device->Driver->VmbusChannelInterface.SendPacket(Device,
- vstorPacket,
- sizeof(VSTOR_PACKET),
- (unsigned long)requestExtension,
- VmbusPacketTypeDataInBand,
- VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
+ vstorPacket,
+ sizeof(struct vstor_packet),
+ (unsigned long)requestExtension,
+ VmbusPacketTypeDataInBand,
+ VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
}
- if (ret != 0)
- {
- DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d", vstorPacket, ret);
+ if (ret != 0) {
+ DPRINT_DBG(STORVSC, "Unable to send packet %p ret %d",
+ vstorPacket, ret);
}
atomic_inc(&storDevice->NumOutstandingRequests);
return ret;
}
-/*++
-
-Name:
- StorVscOnCleanup()
-
-Description:
- Perform any cleanup when the driver is removed
-
---*/
-static void
-StorVscOnCleanup(
- struct hv_driver *Driver
- )
+/**
+ * StorVscOnCleanup - Perform any cleanup when the driver is removed
+ */
+static void StorVscOnCleanup(struct hv_driver *Driver)
{
DPRINT_ENTER(STORVSC);
DPRINT_EXIT(STORVSC);
}
-
-static void
-StorVscOnIOCompletion(
- struct hv_device *Device,
- VSTOR_PACKET *VStorPacket,
- STORVSC_REQUEST_EXTENSION *RequestExt
- )
+/**
+ * StorVscInitialize - Main entry point
+ */
+int StorVscInitialize(struct hv_driver *Driver)
{
- struct hv_storvsc_request *request;
- STORVSC_DEVICE *storDevice;
+ struct storvsc_driver_object *storDriver;
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);
+ storDriver = (struct storvsc_driver_object *)Driver;
- request = RequestExt->Request;
+ DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%zd "
+ "sizeof(struct storvsc_request_extension)=%zd "
+ "sizeof(struct vstor_packet)=%zd, "
+ "sizeof(struct vmscsi_request)=%zd",
+ sizeof(struct hv_storvsc_request),
+ sizeof(struct storvsc_request_extension),
+ sizeof(struct vstor_packet),
+ sizeof(struct vmscsi_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);
+ /* Make sure we are at least 2 pages since 1 page is used for control */
+ ASSERT(storDriver->RingBufferSize >= (PAGE_SIZE << 1));
- ASSERT(VStorPacket->VmSrb.SenseInfoLength <= request->SenseBufferSize);
- memcpy(request->SenseBuffer,
- VStorPacket->VmSrb.SenseData,
- VStorPacket->VmSrb.SenseInfoLength);
+ Driver->name = gDriverName;
+ memcpy(&Driver->deviceType, &gStorVscDeviceType,
+ sizeof(struct hv_guid));
- request->SenseBufferSize = VStorPacket->VmSrb.SenseInfoLength;
- }
- }
+ storDriver->RequestExtSize = sizeof(struct storvsc_request_extension);
- /* TODO: */
- request->BytesXfer = VStorPacket->VmSrb.DataTransferLength;
+ /*
+ * 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 + struct vstor_packet + u64)
+ */
+ storDriver->MaxOutstandingRequestsPerChannel =
+ ((storDriver->RingBufferSize - PAGE_SIZE) /
+ ALIGN_UP(MAX_MULTIPAGE_BUFFER_PACKET +
+ sizeof(struct vstor_packet) + sizeof(u64),
+ sizeof(u64)));
- request->OnIOCompletion(request);
+ DPRINT_INFO(STORVSC, "max io %u, currently %u\n",
+ storDriver->MaxOutstandingRequestsPerChannel,
+ STORVSC_MAX_IO_REQUESTS);
- atomic_dec(&storDevice->NumOutstandingRequests);
+ /* Setup the dispatch table */
+ storDriver->Base.OnDeviceAdd = StorVscOnDeviceAdd;
+ storDriver->Base.OnDeviceRemove = StorVscOnDeviceRemove;
+ storDriver->Base.OnCleanup = StorVscOnCleanup;
- PutStorDevice(Device);
+ storDriver->OnIORequest = StorVscOnIORequest;
+ storDriver->OnHostReset = StorVscOnHostReset;
DPRINT_EXIT(STORVSC);
-}
-
-
-static void
-StorVscOnReceive(
- struct hv_device *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;
- }
-}
-
-static void
-StorVscOnChannelCallback(
- void * Context
- )
-{
- int ret=0;
- struct hv_device *device = (struct hv_device*)Context;
- STORVSC_DEVICE *storDevice;
- u32 bytesRecvd;
- u64 requestId;
- unsigned char 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*)(unsigned long)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));
-
- osd_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;
+ return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff