misc.c File Reference

#include "usbstor.h"
#include <debug.h>

Include dependency graph for misc.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	USBSTOR_SyncForwardIrpCompletionRoutine (PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context)
NTSTATUS NTAPI	USBSTOR_GetBusInterface (IN PDEVICE_OBJECT DeviceObject, OUT PUSB_BUS_INTERFACE_USBDI_V2 BusInterface)
NTSTATUS	USBSTOR_SyncUrbRequest (IN PDEVICE_OBJECT DeviceObject, OUT PURB UrbRequest)
PVOID	AllocateItem (IN POOL_TYPE PoolType, IN ULONG ItemSize)
VOID	FreeItem (IN PVOID Item)
NTSTATUS	USBSTOR_ClassRequest (IN PDEVICE_OBJECT DeviceObject, IN PFDO_DEVICE_EXTENSION DeviceExtension, IN UCHAR RequestType, IN USHORT Index, IN ULONG TransferFlags, IN ULONG TransferBufferLength, IN PVOID TransferBuffer)
NTSTATUS	USBSTOR_GetMaxLUN (IN PDEVICE_OBJECT DeviceObject, IN PFDO_DEVICE_EXTENSION DeviceExtension)
NTSTATUS	USBSTOR_ResetDevice (IN PDEVICE_OBJECT DeviceObject, IN PFDO_DEVICE_EXTENSION DeviceExtension)

Variables
IO_COMPLETION_ROUTINE	SyncForwardIrpCompletionRoutine

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 12 of file misc.c.

Function Documentation

AllocateItem()

PVOID AllocateItem	(	IN POOL_TYPE	PoolType,
		IN ULONG	ItemSize
	)

Definition at line 124 of file misc.c.

{
    return ExAllocatePoolZero(PoolType, ItemSize, USB_STOR_TAG);
}

FreeItem()

VOID FreeItem

(

IN PVOID

Item

)

Definition at line 132 of file misc.c.

{
    ExFreePoolWithTag(Item, USB_STOR_TAG);
}

USBSTOR_ClassRequest()

NTSTATUS USBSTOR_ClassRequest	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PFDO_DEVICE_EXTENSION	DeviceExtension,
		IN UCHAR	RequestType,
		IN USHORT	Index,
		IN ULONG	TransferFlags,
		IN ULONG	TransferBufferLength,
		IN PVOID	TransferBuffer
	)

Definition at line 139 of file misc.c.

{
    PURB Urb;
    NTSTATUS Status;
 
    Urb = (PURB)AllocateItem(NonPagedPool, sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST));
    if (!Urb)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Urb->UrbControlVendorClassRequest.Hdr.Length = sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST);
    Urb->UrbControlVendorClassRequest.Hdr.Function = URB_FUNCTION_CLASS_INTERFACE;
    Urb->UrbControlVendorClassRequest.TransferFlags = TransferFlags;
    Urb->UrbControlVendorClassRequest.TransferBufferLength = TransferBufferLength;
    Urb->UrbControlVendorClassRequest.TransferBuffer = TransferBuffer;
    Urb->UrbControlVendorClassRequest.Request = RequestType;
    Urb->UrbControlVendorClassRequest.Index = Index;
 
    Status = USBSTOR_SyncUrbRequest(DeviceObject, Urb);
 
    FreeItem(Urb);
    return Status;
}

Referenced by USBSTOR_GetMaxLUN(), and USBSTOR_ResetDevice().

USBSTOR_GetBusInterface()

NTSTATUS NTAPI USBSTOR_GetBusInterface	(	IN PDEVICE_OBJECT	DeviceObject,
		OUT PUSB_BUS_INTERFACE_USBDI_V2	BusInterface
	)

Definition at line 33 of file misc.c.

{
    KEVENT Event;
    NTSTATUS Status;
    PIRP Irp;
    IO_STATUS_BLOCK IoStatus;
    PIO_STACK_LOCATION Stack;
 
    ASSERT(DeviceObject);
    ASSERT(BusInterface);
 
    KeInitializeEvent(&Event, NotificationEvent, FALSE);
 
    Irp = IoBuildSynchronousFsdRequest(IRP_MJ_PNP,
                                       DeviceObject,
                                       NULL,
                                       0,
                                       NULL,
                                       &Event,
                                       &IoStatus);
    if (Irp == NULL)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    // initialize request
    Stack = IoGetNextIrpStackLocation(Irp);
    Stack->MajorFunction = IRP_MJ_PNP;
    Stack->MinorFunction = IRP_MN_QUERY_INTERFACE;
    Stack->Parameters.QueryInterface.Size = sizeof(BUS_INTERFACE_STANDARD);
    Stack->Parameters.QueryInterface.InterfaceType = (LPGUID)&USB_BUS_INTERFACE_USBDI_GUID;
    Stack->Parameters.QueryInterface.Version = 2;
    Stack->Parameters.QueryInterface.Interface = (PINTERFACE)BusInterface;
    Stack->Parameters.QueryInterface.InterfaceSpecificData = NULL;
    Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
 
    Status = IoCallDriver(DeviceObject, Irp);
 
    if (Status == STATUS_PENDING)
    {
        KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
        Status = IoStatus.Status;
    }
 
    return Status;
}

Referenced by USBSTOR_FdoHandleStartDevice().

USBSTOR_GetMaxLUN()

NTSTATUS USBSTOR_GetMaxLUN	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PFDO_DEVICE_EXTENSION	DeviceExtension
	)

Definition at line 173 of file misc.c.

{
    PUCHAR Buffer;
    NTSTATUS Status;
 
    Buffer = (PUCHAR)ExAllocatePoolWithTag(NonPagedPool, sizeof(UCHAR), USB_STOR_TAG);
    if (!Buffer)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = USBSTOR_ClassRequest(DeviceObject, DeviceExtension, USB_BULK_GET_MAX_LUN, DeviceExtension->InterfaceInformation->InterfaceNumber, USBD_TRANSFER_DIRECTION_IN, sizeof(UCHAR), Buffer);
 
    DPRINT("MaxLUN: %x\n", *Buffer);
 
    if (NT_SUCCESS(Status))
    {
        if (*Buffer > MAX_LUN)
        {
            // invalid response documented in usb mass storage specification
            Status = STATUS_DEVICE_DATA_ERROR;
        }
        else
        {
            // store maxlun
            DeviceExtension->MaxLUN = *Buffer;
        }
    }
    else
    {
        // "USB Mass Storage Class. Bulk-Only Transport. Revision 1.0"
        // 3.2  Get Max LUN (class-specific request) :
        // Devices that do not support multiple LUNs may STALL this command.
        USBSTOR_ResetDevice(DeviceExtension->LowerDeviceObject, DeviceExtension);
 
        DeviceExtension->MaxLUN = 0;
        Status = STATUS_SUCCESS;
    }
 
    ExFreePoolWithTag(Buffer, USB_STOR_TAG);
    return Status;
}

Referenced by USBSTOR_FdoHandleStartDevice().

USBSTOR_ResetDevice()

NTSTATUS USBSTOR_ResetDevice	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PFDO_DEVICE_EXTENSION	DeviceExtension
	)

Definition at line 219 of file misc.c.

{
    NTSTATUS Status;
 
    Status = USBSTOR_ClassRequest(DeviceObject, DeviceExtension, USB_BULK_RESET_DEVICE, DeviceExtension->InterfaceInformation->InterfaceNumber, USBD_TRANSFER_DIRECTION_OUT, 0, NULL);
    return Status;
}

Referenced by USBSTOR_GetMaxLUN(), USBSTOR_HandleTransferError(), USBSTOR_ResetDeviceWorkItemRoutine(), and USBSTOR_TimerWorkerRoutine().

USBSTOR_SyncForwardIrpCompletionRoutine()

NTSTATUS NTAPI USBSTOR_SyncForwardIrpCompletionRoutine	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp,
		PVOID	Context
	)

Definition at line 19 of file misc.c.

{
    if (Irp->PendingReturned)
    {
        KeSetEvent((PKEVENT)Context, IO_NO_INCREMENT, FALSE);
    }
    return STATUS_MORE_PROCESSING_REQUIRED;
}

USBSTOR_SyncUrbRequest()

NTSTATUS USBSTOR_SyncUrbRequest	(	IN PDEVICE_OBJECT	DeviceObject,
		OUT PURB	UrbRequest
	)

Definition at line 83 of file misc.c.

{
    PIRP Irp;
    PIO_STACK_LOCATION IoStack;
    KEVENT Event;
    NTSTATUS Status;
 
    Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
    if (!Irp)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    KeInitializeEvent(&Event, NotificationEvent, FALSE);
 
    IoStack = IoGetNextIrpStackLocation(Irp);
 
    // initialize stack location
    IoStack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
    IoStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_INTERNAL_USB_SUBMIT_URB;
    IoStack->Parameters.Others.Argument1 = (PVOID)UrbRequest;
    IoStack->Parameters.DeviceIoControl.InputBufferLength = UrbRequest->UrbHeader.Length;
    Irp->IoStatus.Status = STATUS_SUCCESS;
 
    IoSetCompletionRoutine(Irp, USBSTOR_SyncForwardIrpCompletionRoutine, &Event, TRUE, TRUE, TRUE);
 
    Status = IoCallDriver(DeviceObject, Irp);
 
    if (Status == STATUS_PENDING)
    {
        KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
        Status = Irp->IoStatus.Status;
    }
 
    IoFreeIrp(Irp);
    return Status;
}

Referenced by USBSTOR_ClassRequest(), USBSTOR_GetDescriptor(), USBSTOR_GetEndpointStatus(), USBSTOR_ResetPipeWithHandle(), and USBSTOR_SelectConfigurationAndInterface().

Variable Documentation

SyncForwardIrpCompletionRoutine

IO_COMPLETION_ROUTINE SyncForwardIrpCompletionRoutine

Definition at line 15 of file misc.c.