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522 lines
12 KiB
522 lines
12 KiB
/*++
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Copyright (c) 1997-2000 Microsoft Corporation
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Module Name:
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arbiter.c
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Abstract:
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This module provides arbiters for the resources consumed by PDOs.
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Author:
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Andy Thornton (andrewth) 20-Oct-97
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Revision History:
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--*/
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#include "mfp.h"
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NTSTATUS
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MfUnpackRequirement(
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IN PIO_RESOURCE_DESCRIPTOR Descriptor,
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OUT PULONGLONG Minimum,
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OUT PULONGLONG Maximum,
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OUT PULONG Length,
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OUT PULONG Alignment
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);
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NTSTATUS
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MfPackResource(
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IN PIO_RESOURCE_DESCRIPTOR Requirement,
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IN ULONGLONG Start,
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OUT PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor
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);
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NTSTATUS
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MfUnpackResource(
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IN PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor,
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OUT PULONGLONG Start,
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OUT PULONG Length
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);
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NTSTATUS
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MfRequirementFromResource(
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IN PCM_PARTIAL_RESOURCE_DESCRIPTOR Resource,
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OUT PIO_RESOURCE_DESCRIPTOR Requirement
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);
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NTSTATUS
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MfUpdateResource(
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IN OUT PCM_PARTIAL_RESOURCE_DESCRIPTOR Resource,
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IN ULONGLONG Start,
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IN ULONG Length
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);
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//
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// Make everything pageable
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//
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, MfFindResourceType)
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#pragma alloc_text(PAGE, MfUnpackRequirement)
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#pragma alloc_text(PAGE, MfPackResource)
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#pragma alloc_text(PAGE, MfUnpackResource)
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#pragma alloc_text(PAGE, MfUpdateResource)
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#endif // ALLOC_PRAGMA
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//
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// This table describes the resource types that are understood by the MF driver.
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// It is implemented thus to that in the future MF could be educated about new
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// resource types dynamically.
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//
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MF_RESOURCE_TYPE MfResourceTypes[] = {
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{
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CmResourceTypePort,
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MfUnpackRequirement,
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MfPackResource,
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MfUnpackResource,
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MfRequirementFromResource,
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MfUpdateResource
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},
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{
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CmResourceTypeInterrupt,
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MfUnpackRequirement,
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MfPackResource,
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MfUnpackResource,
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MfRequirementFromResource,
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MfUpdateResource
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},
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{
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CmResourceTypeMemory,
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MfUnpackRequirement,
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MfPackResource,
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MfUnpackResource,
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MfRequirementFromResource,
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MfUpdateResource
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},
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{
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CmResourceTypeDma,
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MfUnpackRequirement,
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MfPackResource,
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MfUnpackResource,
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MfRequirementFromResource,
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MfUpdateResource
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},
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{
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CmResourceTypeBusNumber,
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MfUnpackRequirement,
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MfPackResource,
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MfUnpackResource,
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MfRequirementFromResource,
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MfUpdateResource
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}
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};
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NTSTATUS
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MfRequirementFromResource(
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IN PCM_PARTIAL_RESOURCE_DESCRIPTOR Resource,
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OUT PIO_RESOURCE_DESCRIPTOR Requirement
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)
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/*++
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Routine Description:
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This function build an requirements descriptor for a resource the parent is
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started with.
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Arguments:
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Resource - Pointer to the resource to make a requirement from
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Requirement - Pointer to a descriptor that should be filled in
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Return Value:
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Success or otherwise of the operation
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--*/
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{
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//
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// Copy the common fields
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//
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Requirement->Type = Resource->Type;
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Requirement->ShareDisposition = Resource->ShareDisposition;
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Requirement->Flags = Resource->Flags;
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//
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// Fill in the requirement
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//
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switch (Resource->Type) {
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case CmResourceTypeMemory:
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case CmResourceTypePort:
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//
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// We *DO NOT* support zero length requirements
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//
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if (Resource->u.Generic.Length == 0) {
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return STATUS_INVALID_PARAMETER;
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}
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Requirement->u.Generic.MinimumAddress = Resource->u.Generic.Start;
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Requirement->u.Generic.MaximumAddress.QuadPart =
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Resource->u.Generic.Start.QuadPart + Resource->u.Generic.Length - 1;
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Requirement->u.Generic.Length = Resource->u.Generic.Length;
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Requirement->u.Generic.Alignment = 1;
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break;
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case CmResourceTypeInterrupt:
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Requirement->u.Interrupt.MinimumVector = Resource->u.Interrupt.Vector;
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Requirement->u.Interrupt.MaximumVector = Resource->u.Interrupt.Vector;
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break;
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case CmResourceTypeDma:
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Requirement->u.Dma.MinimumChannel = Resource->u.Dma.Channel;
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Requirement->u.Dma.MinimumChannel = Resource->u.Dma.Channel;
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break;
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case CmResourceTypeBusNumber:
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//
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// We *DO NOT* support zero length requirements
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//
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if (Resource->u.BusNumber.Length == 0) {
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return STATUS_INVALID_PARAMETER;
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}
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Requirement->u.BusNumber.Length = Resource->u.BusNumber.Length;
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Requirement->u.BusNumber.MinBusNumber = Resource->u.BusNumber.Start;
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Requirement->u.BusNumber.MaxBusNumber = Resource->u.BusNumber.Start +
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Resource->u.BusNumber.Length - 1;
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break;
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case CmResourceTypeDevicePrivate:
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Requirement->u.DevicePrivate.Data[0] = Resource->u.DevicePrivate.Data[0];
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Requirement->u.DevicePrivate.Data[1] = Resource->u.DevicePrivate.Data[1];
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Requirement->u.DevicePrivate.Data[2] = Resource->u.DevicePrivate.Data[2];
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break;
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default:
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return STATUS_INVALID_PARAMETER;
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}
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return STATUS_SUCCESS;
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}
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PMF_RESOURCE_TYPE
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MfFindResourceType(
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IN CM_RESOURCE_TYPE Type
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)
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/*++
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Routine Description:
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This routine searches the database of know resource types to find the
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resource descriptor manipulation routines for resources of type Type.
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Arguments:
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Type - The resource type we are interested in.
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Return Value:
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Returns a pointer to the appropriate MF_RESOURCE_TYPE or NULL if one could
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not be found.
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--*/
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{
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PMF_RESOURCE_TYPE current;
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PAGED_CODE();
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FOR_ALL_IN_ARRAY(MfResourceTypes,
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sizeof(MfResourceTypes) / sizeof(MF_RESOURCE_TYPE),
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current
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) {
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if (current->Type == Type) {
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return current;
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}
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}
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return NULL;
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}
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NTSTATUS
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MfUnpackRequirement(
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IN PIO_RESOURCE_DESCRIPTOR Descriptor,
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OUT PULONGLONG Minimum,
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OUT PULONGLONG Maximum,
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OUT PULONG Length,
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OUT PULONG Alignment
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)
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/*++
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Routine Description:
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This routine unpacks an resource requirement descriptor.
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Arguments:
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Descriptor - The descriptor describing the requirement to unpack.
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Minimum - Pointer to where the minimum acceptable start value should be
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unpacked to.
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Maximum - Pointer to where the maximum acceptable end value should be
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unpacked to.
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Length - Pointer to where the required length should be unpacked to.
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Minimum - Pointer to where the required alignment should be unpacked to.
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Return Value:
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Returns the status of this operation.
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--*/
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{
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PAGED_CODE();
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switch (Descriptor->Type) {
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case CmResourceTypePort:
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case CmResourceTypeMemory:
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*Maximum = Descriptor->u.Generic.MaximumAddress.QuadPart;
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*Minimum = Descriptor->u.Generic.MinimumAddress.QuadPart;
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*Length = Descriptor->u.Generic.Length;
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*Alignment = Descriptor->u.Generic.Alignment;
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break;
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case CmResourceTypeInterrupt:
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*Maximum = Descriptor->u.Interrupt.MaximumVector;
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*Minimum = Descriptor->u.Interrupt.MinimumVector;
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*Length = 1;
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*Alignment = 1;
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break;
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case CmResourceTypeDma:
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*Maximum = Descriptor->u.Dma.MaximumChannel;
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*Minimum = Descriptor->u.Dma.MinimumChannel;
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*Length = 1;
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*Alignment = 1;
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break;
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case CmResourceTypeBusNumber:
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*Maximum = Descriptor->u.BusNumber.MaxBusNumber;
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*Minimum = Descriptor->u.BusNumber.MinBusNumber;
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*Length = Descriptor->u.BusNumber.Length;
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*Alignment = 1;
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break;
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default:
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return STATUS_INVALID_PARAMETER;
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}
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//
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// Zero alignment is illegal.
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//
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if (*Alignment == 0) {
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*Alignment = 1;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS
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MfPackResource(
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IN PIO_RESOURCE_DESCRIPTOR Requirement,
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IN ULONGLONG Start,
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OUT PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor
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)
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/*++
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Routine Description:
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This routine packs an resource descriptor.
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Arguments:
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Requirement - The requirement from which this resource was chosen.
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Start - The start value of the resource.
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Descriptor - Pointer to the descriptor to pack into.
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Return Value:
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Returns the status of this operation.
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--*/
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{
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PAGED_CODE();
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switch (Requirement->Type) {
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case CmResourceTypePort:
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case CmResourceTypeMemory:
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Descriptor->u.Generic.Start.QuadPart = Start;
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Descriptor->u.Generic.Length = Requirement->u.Generic.Length;
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break;
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case CmResourceTypeInterrupt:
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ASSERT(Start <= MAXULONG);
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Descriptor->u.Interrupt.Level = (ULONG)Start;
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Descriptor->u.Interrupt.Vector = (ULONG)Start;
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Descriptor->u.Interrupt.Affinity = 0xFFFFFFFF;
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break;
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case CmResourceTypeDma:
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ASSERT(Start <= MAXULONG);
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Descriptor->u.Dma.Channel = (ULONG)Start;
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Descriptor->u.Dma.Port = 0;
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break;
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case CmResourceTypeBusNumber:
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ASSERT(Start <= MAXULONG);
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Descriptor->u.BusNumber.Start = (ULONG)Start;
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Descriptor->u.BusNumber.Length = Requirement->u.BusNumber.Length;
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break;
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default:
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return STATUS_INVALID_PARAMETER;
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}
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Descriptor->ShareDisposition = Requirement->ShareDisposition;
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Descriptor->Flags = Requirement->Flags;
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Descriptor->Type = Requirement->Type;
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return STATUS_SUCCESS;
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}
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NTSTATUS
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MfUnpackResource(
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IN PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor,
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OUT PULONGLONG Start,
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OUT PULONG Length
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)
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/*++
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Routine Description:
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This routine unpacks a resource descriptor.
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Arguments:
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Descriptor - The descriptor describing the resource to unpack.
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Start - Pointer to where the start value should be unpacked to.
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End - Pointer to where the end value should be unpacked to.
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Return Value:
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Returns the status of this operation.
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--*/
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{
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PAGED_CODE();
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switch (Descriptor->Type) {
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case CmResourceTypePort:
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case CmResourceTypeMemory:
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*Start = Descriptor->u.Generic.Start.QuadPart;
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*Length = Descriptor->u.Generic.Length;
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break;
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case CmResourceTypeInterrupt:
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*Start = Descriptor->u.Interrupt.Vector;
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*Length = 1;
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break;
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case CmResourceTypeDma:
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*Start = Descriptor->u.Dma.Channel;
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*Length = 1;
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break;
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case CmResourceTypeBusNumber:
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*Start = Descriptor->u.BusNumber.Start;
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*Length = Descriptor->u.BusNumber.Length;
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break;
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default:
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return STATUS_INVALID_PARAMETER;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS
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MfUpdateResource(
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IN OUT PCM_PARTIAL_RESOURCE_DESCRIPTOR Resource,
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IN ULONGLONG Start,
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IN ULONG Length
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)
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{
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PAGED_CODE();
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ASSERT(Resource);
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switch (Resource->Type) {
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case CmResourceTypePort:
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case CmResourceTypeMemory:
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Resource->u.Generic.Start.QuadPart = Start;
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Resource->u.Generic.Length = Length;
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break;
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case CmResourceTypeInterrupt:
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ASSERT(Start < MAXULONG);
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Resource->u.Interrupt.Vector = (ULONG)Start;
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break;
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case CmResourceTypeDma:
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ASSERT(Start < MAXULONG);
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Resource->u.Dma.Channel = (ULONG)Start;
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break;
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case CmResourceTypeBusNumber:
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ASSERT(Start < MAXULONG);
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Resource->u.BusNumber.Start = (ULONG)Start;
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Resource->u.BusNumber.Length = Length;
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break;
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default:
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return STATUS_INVALID_PARAMETER;
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}
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return STATUS_SUCCESS;
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}
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