mirror of
https://github.com/reactos/reactos.git
synced 2024-06-29 17:31:31 +00:00
363 lines
10 KiB
C
363 lines
10 KiB
C
/*
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* PROJECT: ReactOS Universal Serial Bus Bulk Storage Driver
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: USB block storage device driver.
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* COPYRIGHT: 2005-2006 James Tabor
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* 2011-2012 Michael Martin (michael.martin@reactos.org)
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* 2011-2013 Johannes Anderwald (johannes.anderwald@reactos.org)
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*/
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#include "usbstor.h"
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#define NDEBUG
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#include <debug.h>
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VOID
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USBSTOR_QueueInitialize(
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PFDO_DEVICE_EXTENSION FDODeviceExtension)
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{
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ASSERT(FDODeviceExtension->Common.IsFDO);
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KeInitializeSpinLock(&FDODeviceExtension->IrpListLock);
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InitializeListHead(&FDODeviceExtension->IrpListHead);
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KeInitializeEvent(&FDODeviceExtension->NoPendingRequests, NotificationEvent, TRUE);
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}
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VOID
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NTAPI
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USBSTOR_CancelIo(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT_IRQL_EQUAL(DISPATCH_LEVEL);
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ASSERT(FDODeviceExtension->Common.IsFDO);
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// this IRP isn't in our list here
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// now release the cancel lock
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IoReleaseCancelSpinLock(Irp->CancelIrql);
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Irp->IoStatus.Status = STATUS_CANCELLED;
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USBSTOR_QueueTerminateRequest(DeviceObject, Irp);
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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USBSTOR_QueueNextRequest(DeviceObject);
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}
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VOID
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NTAPI
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USBSTOR_Cancel(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT_IRQL_EQUAL(DISPATCH_LEVEL);
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ASSERT(FDODeviceExtension->Common.IsFDO);
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KeAcquireSpinLockAtDpcLevel(&FDODeviceExtension->IrpListLock);
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RemoveEntryList(&Irp->Tail.Overlay.ListEntry);
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KeReleaseSpinLockFromDpcLevel(&FDODeviceExtension->IrpListLock);
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IoReleaseCancelSpinLock(Irp->CancelIrql);
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Irp->IoStatus.Status = STATUS_CANCELLED;
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USBSTOR_QueueTerminateRequest(DeviceObject, Irp);
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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USBSTOR_QueueNextRequest(DeviceObject);
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}
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BOOLEAN
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USBSTOR_QueueAddIrp(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PDRIVER_CANCEL OldDriverCancel;
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KIRQL OldLevel;
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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BOOLEAN IrpListFreeze;
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BOOLEAN SrbProcessing;
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PIO_STACK_LOCATION IoStack = IoGetCurrentIrpStackLocation(Irp);
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PSCSI_REQUEST_BLOCK Request = (PSCSI_REQUEST_BLOCK)IoStack->Parameters.Others.Argument1;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT(FDODeviceExtension->Common.IsFDO);
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IoMarkIrpPending(Irp);
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KeAcquireSpinLock(&FDODeviceExtension->IrpListLock, &OldLevel);
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SrbProcessing = FDODeviceExtension->IrpPendingCount != 0;
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if (SrbProcessing)
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{
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// add irp to queue
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InsertTailList(&FDODeviceExtension->IrpListHead, &Irp->Tail.Overlay.ListEntry);
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}
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FDODeviceExtension->IrpPendingCount++;
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KeClearEvent(&FDODeviceExtension->NoPendingRequests);
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// check if queue is freezed
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IrpListFreeze = BooleanFlagOn(FDODeviceExtension->Flags, USBSTOR_FDO_FLAGS_IRP_LIST_FREEZE);
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KeReleaseSpinLock(&FDODeviceExtension->IrpListLock, OldLevel);
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// synchronize with cancellations by holding the cancel lock
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IoAcquireCancelSpinLock(&Irp->CancelIrql);
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if (SrbProcessing)
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{
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ASSERT(FDODeviceExtension->ActiveSrb != NULL);
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OldDriverCancel = IoSetCancelRoutine(Irp, USBSTOR_Cancel);
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}
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else
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{
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ASSERT(FDODeviceExtension->ActiveSrb == NULL);
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FDODeviceExtension->ActiveSrb = Request;
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OldDriverCancel = IoSetCancelRoutine(Irp, USBSTOR_CancelIo);
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}
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// check if the irp has already been cancelled
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if (Irp->Cancel && OldDriverCancel == NULL)
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{
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// cancel irp
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Irp->CancelRoutine(DeviceObject, Irp);
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return FALSE;
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}
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IoReleaseCancelSpinLock(Irp->CancelIrql);
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// if list is freezed, dont start this packet
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DPRINT("IrpListFreeze: %lu IrpPendingCount %lu\n", IrpListFreeze, FDODeviceExtension->IrpPendingCount);
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return (IrpListFreeze || SrbProcessing);
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}
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PIRP
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USBSTOR_RemoveIrp(
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IN PDEVICE_OBJECT DeviceObject)
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{
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KIRQL OldLevel;
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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PLIST_ENTRY Entry;
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PIRP Irp = NULL;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT(FDODeviceExtension->Common.IsFDO);
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KeAcquireSpinLock(&FDODeviceExtension->IrpListLock, &OldLevel);
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if (!IsListEmpty(&FDODeviceExtension->IrpListHead))
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{
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Entry = RemoveHeadList(&FDODeviceExtension->IrpListHead);
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// get offset to start of irp
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Irp = (PIRP)CONTAINING_RECORD(Entry, IRP, Tail.Overlay.ListEntry);
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}
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KeReleaseSpinLock(&FDODeviceExtension->IrpListLock, OldLevel);
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return Irp;
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}
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VOID
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USBSTOR_QueueWaitForPendingRequests(
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IN PDEVICE_OBJECT DeviceObject)
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{
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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KeWaitForSingleObject(&FDODeviceExtension->NoPendingRequests,
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Executive,
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KernelMode,
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FALSE,
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NULL);
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}
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VOID
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USBSTOR_QueueTerminateRequest(
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IN PDEVICE_OBJECT FDODeviceObject,
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IN PIRP Irp)
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{
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KIRQL OldLevel;
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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PIO_STACK_LOCATION IoStack = IoGetCurrentIrpStackLocation(Irp);
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PSCSI_REQUEST_BLOCK Request = (PSCSI_REQUEST_BLOCK)IoStack->Parameters.Others.Argument1;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)FDODeviceObject->DeviceExtension;
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ASSERT(FDODeviceExtension->Common.IsFDO);
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KeAcquireSpinLock(&FDODeviceExtension->IrpListLock, &OldLevel);
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FDODeviceExtension->IrpPendingCount--;
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// check if this was our current active SRB
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if (FDODeviceExtension->ActiveSrb == Request)
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{
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// indicate processing is completed
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FDODeviceExtension->ActiveSrb = NULL;
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}
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// Set the event if nothing else is pending
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if (FDODeviceExtension->IrpPendingCount == 0 &&
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FDODeviceExtension->ActiveSrb == NULL)
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{
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KeSetEvent(&FDODeviceExtension->NoPendingRequests, IO_NO_INCREMENT, FALSE);
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}
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KeReleaseSpinLock(&FDODeviceExtension->IrpListLock, OldLevel);
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}
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VOID
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USBSTOR_QueueNextRequest(
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IN PDEVICE_OBJECT DeviceObject)
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{
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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PIRP Irp;
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PIO_STACK_LOCATION IoStack;
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PSCSI_REQUEST_BLOCK Request;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT(FDODeviceExtension->Common.IsFDO);
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// check first if there's already a request pending or the queue is frozen
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if (FDODeviceExtension->ActiveSrb != NULL ||
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BooleanFlagOn(FDODeviceExtension->Flags, USBSTOR_FDO_FLAGS_IRP_LIST_FREEZE))
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{
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// no work to do yet
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return;
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}
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// remove first irp from list
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Irp = USBSTOR_RemoveIrp(DeviceObject);
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// is there an irp pending
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if (!Irp)
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{
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// no work to do
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IoStartNextPacket(DeviceObject, TRUE);
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return;
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}
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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Request = (PSCSI_REQUEST_BLOCK)IoStack->Parameters.Others.Argument1;
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ASSERT(Request);
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FDODeviceExtension->ActiveSrb = Request;
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// start next packet
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IoStartPacket(DeviceObject, Irp, &Request->QueueSortKey, USBSTOR_CancelIo);
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IoStartNextPacket(DeviceObject, TRUE);
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}
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VOID
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USBSTOR_QueueRelease(
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IN PDEVICE_OBJECT DeviceObject)
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{
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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PIRP Irp;
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KIRQL OldLevel;
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PIO_STACK_LOCATION IoStack;
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PSCSI_REQUEST_BLOCK Request;
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT(FDODeviceExtension->Common.IsFDO);
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KeAcquireSpinLock(&FDODeviceExtension->IrpListLock, &OldLevel);
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// clear freezed status
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FDODeviceExtension->Flags &= ~USBSTOR_FDO_FLAGS_IRP_LIST_FREEZE;
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KeReleaseSpinLock(&FDODeviceExtension->IrpListLock, OldLevel);
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// grab newest irp
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Irp = USBSTOR_RemoveIrp(DeviceObject);
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if (!Irp)
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{
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return;
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}
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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Request = (PSCSI_REQUEST_BLOCK)IoStack->Parameters.Others.Argument1;
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IoStartPacket(DeviceObject,
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Irp,
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&Request->QueueSortKey,
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USBSTOR_CancelIo);
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}
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VOID
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NTAPI
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USBSTOR_StartIo(
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PDEVICE_OBJECT DeviceObject,
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PIRP Irp)
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{
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PIO_STACK_LOCATION IoStack;
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PSCSI_REQUEST_BLOCK Request;
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PFDO_DEVICE_EXTENSION FDODeviceExtension;
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PPDO_DEVICE_EXTENSION PDODeviceExtension;
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KIRQL OldLevel;
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BOOLEAN ResetInProgress;
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DPRINT("USBSTOR_StartIo\n");
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FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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ASSERT(FDODeviceExtension->Common.IsFDO);
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IoAcquireCancelSpinLock(&OldLevel);
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IoSetCancelRoutine(Irp, NULL);
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// check if the irp has been cancelled
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if (Irp->Cancel)
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{
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IoReleaseCancelSpinLock(OldLevel);
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Irp->IoStatus.Status = STATUS_CANCELLED;
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Irp->IoStatus.Information = 0;
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USBSTOR_QueueTerminateRequest(DeviceObject, Irp);
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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USBSTOR_QueueNextRequest(DeviceObject);
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return;
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}
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IoReleaseCancelSpinLock(OldLevel);
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KeAcquireSpinLock(&FDODeviceExtension->CommonLock, &OldLevel);
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ResetInProgress = BooleanFlagOn(FDODeviceExtension->Flags, USBSTOR_FDO_FLAGS_DEVICE_RESETTING);
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KeReleaseSpinLock(&FDODeviceExtension->CommonLock, OldLevel);
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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PDODeviceExtension = (PPDO_DEVICE_EXTENSION)IoStack->DeviceObject->DeviceExtension;
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Request = IoStack->Parameters.Scsi.Srb;
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ASSERT(PDODeviceExtension->Common.IsFDO == FALSE);
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if (ResetInProgress)
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{
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// hard reset is in progress
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Request->SrbStatus = SRB_STATUS_NO_DEVICE;
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Request->DataTransferLength = 0;
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Irp->IoStatus.Information = 0;
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Irp->IoStatus.Status = STATUS_DEVICE_DOES_NOT_EXIST;
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USBSTOR_QueueTerminateRequest(DeviceObject, Irp);
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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USBSTOR_QueueNextRequest(DeviceObject);
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return;
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}
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USBSTOR_HandleExecuteSCSI(IoStack->DeviceObject, Irp);
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// FIXME: handle error
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}
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