miniport.c

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/*
 * COPYRIGHT:       See COPYING in the top level directory
 * PROJECT:         PCI IDE bus driver extension
 * FILE:            drivers/storage/pciidex/miniport.c
 * PURPOSE:         Miniport functions
 * PROGRAMMERS:     Hervé Poussineau (hpoussin@reactos.org)
 */

#define INITGUID
#include "pciidex.h"

#define NDEBUG
#include <debug.h>

static DRIVER_DISPATCH PciIdeXForwardOrIgnore;
static NTSTATUS NTAPI
PciIdeXForwardOrIgnore(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    if (((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsFDO)
        return ForwardIrpAndForget(DeviceObject, Irp);
    else
    {
        ULONG MajorFunction = IoGetCurrentIrpStackLocation(Irp)->MajorFunction;
        NTSTATUS Status;

        if (MajorFunction == IRP_MJ_CREATE ||
            MajorFunction == IRP_MJ_CLEANUP ||
            MajorFunction == IRP_MJ_CLOSE)
        {
            Status = STATUS_SUCCESS;
        }
        else
        {
            DPRINT1("PDO stub for major function 0x%lx\n", MajorFunction);
            Status = STATUS_NOT_SUPPORTED;
        }
        Irp->IoStatus.Information = 0;
        Irp->IoStatus.Status = Status;
        IoCompleteRequest(Irp, IO_NO_INCREMENT);
        return Status;
    }
}

static DRIVER_DISPATCH PciIdeXPnpDispatch;
static NTSTATUS NTAPI
PciIdeXPnpDispatch(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    if (((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsFDO)
        return PciIdeXFdoPnpDispatch(DeviceObject, Irp);
    else
        return PciIdeXPdoPnpDispatch(DeviceObject, Irp);
}

NTSTATUS NTAPI
PciIdeXInitialize(
    IN PDRIVER_OBJECT DriverObject,
    IN PUNICODE_STRING RegistryPath,
    IN PCONTROLLER_PROPERTIES HwGetControllerProperties,
    IN ULONG ExtensionSize)
{
    ULONG i;
    PPCIIDEX_DRIVER_EXTENSION DriverExtension;
    NTSTATUS Status;

    DPRINT("PciIdeXInitialize(%p '%wZ' %p 0x%lx)\n",
        DriverObject, RegistryPath, HwGetControllerProperties, ExtensionSize);

    Status = IoAllocateDriverObjectExtension(
        DriverObject,
        DriverObject,
        sizeof(PCIIDEX_DRIVER_EXTENSION),
        (PVOID*)&DriverExtension);
    if (!NT_SUCCESS(Status))
        return Status;
    RtlZeroMemory(DriverExtension, sizeof(PCIIDEX_DRIVER_EXTENSION));
    DriverExtension->MiniControllerExtensionSize = ExtensionSize;
    DriverExtension->HwGetControllerProperties = HwGetControllerProperties;

    DriverObject->DriverExtension->AddDevice = PciIdeXAddDevice;

    for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
        DriverObject->MajorFunction[i] = PciIdeXForwardOrIgnore;
    DriverObject->MajorFunction[IRP_MJ_PNP] = PciIdeXPnpDispatch;

    return STATUS_SUCCESS;
}

/* May be called at IRQL <= DISPATCH_LEVEL */
NTSTATUS NTAPI
PciIdeXGetBusData(
    IN PVOID DeviceExtension,
    IN PVOID Buffer,
    IN ULONG ConfigDataOffset,
    IN ULONG BufferLength)
{
    PFDO_DEVICE_EXTENSION FdoDeviceExtension;
    ULONG BytesRead;
    NTSTATUS Status = STATUS_UNSUCCESSFUL;

    DPRINT("PciIdeXGetBusData(%p %p 0x%lx 0x%lx)\n",
        DeviceExtension, Buffer, ConfigDataOffset, BufferLength);

    FdoDeviceExtension = CONTAINING_RECORD(DeviceExtension, FDO_DEVICE_EXTENSION, MiniControllerExtension);
    if (FdoDeviceExtension->BusInterface)
    {
        BytesRead = (*FdoDeviceExtension->BusInterface->GetBusData)(
            FdoDeviceExtension->BusInterface->Context,
            PCI_WHICHSPACE_CONFIG,
            Buffer,
            ConfigDataOffset,
            BufferLength);
        if (BytesRead == BufferLength)
            Status = STATUS_SUCCESS;
    }

    return Status;
}

/* May be called at IRQL <= DISPATCH_LEVEL */
NTSTATUS NTAPI
PciIdeXSetBusData(
    IN PVOID DeviceExtension,
    IN PVOID Buffer,
    IN PVOID DataMask,
    IN ULONG ConfigDataOffset,
    IN ULONG BufferLength)
{
    PFDO_DEVICE_EXTENSION FdoDeviceExtension;
    PUCHAR CurrentBuffer = NULL;
    ULONG i, BytesWritten;
    NTSTATUS Status;

    DPRINT("PciIdeXSetBusData(%p %p %p 0x%lx 0x%lx)\n",
        DeviceExtension, Buffer, DataMask, ConfigDataOffset, BufferLength);

    CurrentBuffer = ExAllocatePool(NonPagedPool, BufferLength);
    if (!CurrentBuffer)
    {
        Status = STATUS_INSUFFICIENT_RESOURCES;
        return Status;
    }

    Status = PciIdeXGetBusData(DeviceExtension, Buffer, ConfigDataOffset, BufferLength);
    if (!NT_SUCCESS(Status))
        goto cleanup;

    for (i = 0; i < BufferLength; i++)
        CurrentBuffer[i] = (CurrentBuffer[i] & ~((PUCHAR)DataMask)[i]) | (((PUCHAR)DataMask)[i] & ((PUCHAR)Buffer)[i]);

    FdoDeviceExtension = CONTAINING_RECORD(DeviceExtension, FDO_DEVICE_EXTENSION, MiniControllerExtension);
    if (!FdoDeviceExtension->BusInterface)
    {
        Status = STATUS_UNSUCCESSFUL;
        goto cleanup;
    }

    BytesWritten = (*FdoDeviceExtension->BusInterface->SetBusData)(
        FdoDeviceExtension->BusInterface->Context,
        PCI_WHICHSPACE_CONFIG,
        CurrentBuffer,
        ConfigDataOffset,
        BufferLength);
    if (BytesWritten == BufferLength)
        Status = STATUS_SUCCESS;
    else
        Status = STATUS_UNSUCCESSFUL;

cleanup:
    ExFreePool(CurrentBuffer);
    return Status;
}