2bbbdeeea2
Add support for allocating aligned pages at an alignment higher than 4K. The new function allocated memory taking into account the padding required and then frees up unused pages before mapping it. Signed-off-by: Ashish Singhal <ashishsingha@nvidia.com> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
371 lines
12 KiB
C
371 lines
12 KiB
C
/** @file
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The DMA memory help function.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "XhcPeim.h"
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EDKII_IOMMU_PPI *mIoMmu;
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/**
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Provides the controller-specific addresses required to access system memory from a
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DMA bus master.
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@param Operation Indicates if the bus master is going to read or write to system memory.
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@param HostAddress The system memory address to map to the PCI controller.
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@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
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that were mapped.
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@param DeviceAddress The resulting map address for the bus master PCI controller to use to
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access the hosts HostAddress.
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@param Mapping A resulting value to pass to Unmap().
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@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
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@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
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**/
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EFI_STATUS
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IoMmuMap (
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IN EDKII_IOMMU_OPERATION Operation,
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IN VOID *HostAddress,
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IN OUT UINTN *NumberOfBytes,
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OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
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OUT VOID **Mapping
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)
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{
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EFI_STATUS Status;
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UINT64 Attribute;
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if (mIoMmu != NULL) {
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Status = mIoMmu->Map (
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mIoMmu,
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Operation,
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HostAddress,
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NumberOfBytes,
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DeviceAddress,
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Mapping
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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switch (Operation) {
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case EdkiiIoMmuOperationBusMasterRead:
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case EdkiiIoMmuOperationBusMasterRead64:
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Attribute = EDKII_IOMMU_ACCESS_READ;
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break;
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case EdkiiIoMmuOperationBusMasterWrite:
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case EdkiiIoMmuOperationBusMasterWrite64:
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Attribute = EDKII_IOMMU_ACCESS_WRITE;
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break;
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case EdkiiIoMmuOperationBusMasterCommonBuffer:
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case EdkiiIoMmuOperationBusMasterCommonBuffer64:
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Attribute = EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE;
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break;
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default:
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ASSERT(FALSE);
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return EFI_INVALID_PARAMETER;
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}
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Status = mIoMmu->SetAttribute (
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mIoMmu,
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*Mapping,
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Attribute
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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} else {
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*DeviceAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress;
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*Mapping = NULL;
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Status = EFI_SUCCESS;
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}
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return Status;
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}
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/**
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Completes the Map() operation and releases any corresponding resources.
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@param Mapping The mapping value returned from Map().
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@retval EFI_SUCCESS The range was unmapped.
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@retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().
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@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.
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**/
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EFI_STATUS
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IoMmuUnmap (
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IN VOID *Mapping
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)
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{
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EFI_STATUS Status;
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if (mIoMmu != NULL) {
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Status = mIoMmu->SetAttribute (mIoMmu, Mapping, 0);
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Status = mIoMmu->Unmap (mIoMmu, Mapping);
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} else {
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Status = EFI_SUCCESS;
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}
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return Status;
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}
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/**
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Allocates pages that are suitable for an OperationBusMasterCommonBuffer or
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OperationBusMasterCommonBuffer64 mapping.
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@param Pages The number of pages to allocate.
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@param HostAddress A pointer to store the base system memory address of the
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allocated range.
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@param DeviceAddress The resulting map address for the bus master PCI controller to use to
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access the hosts HostAddress.
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@param Mapping A resulting value to pass to Unmap().
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@retval EFI_SUCCESS The requested memory pages were allocated.
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@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
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MEMORY_WRITE_COMBINE and MEMORY_CACHED.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
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**/
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EFI_STATUS
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IoMmuAllocateBuffer (
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IN UINTN Pages,
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OUT VOID **HostAddress,
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OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
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OUT VOID **Mapping
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)
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{
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EFI_STATUS Status;
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UINTN NumberOfBytes;
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EFI_PHYSICAL_ADDRESS HostPhyAddress;
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*HostAddress = NULL;
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*DeviceAddress = 0;
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if (mIoMmu != NULL) {
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Status = mIoMmu->AllocateBuffer (
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mIoMmu,
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EfiBootServicesData,
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Pages,
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HostAddress,
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0
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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NumberOfBytes = EFI_PAGES_TO_SIZE(Pages);
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Status = mIoMmu->Map (
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mIoMmu,
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EdkiiIoMmuOperationBusMasterCommonBuffer,
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*HostAddress,
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&NumberOfBytes,
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DeviceAddress,
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Mapping
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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Status = mIoMmu->SetAttribute (
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mIoMmu,
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*Mapping,
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EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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} else {
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Status = PeiServicesAllocatePages (
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EfiBootServicesData,
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Pages,
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&HostPhyAddress
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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*HostAddress = (VOID *)(UINTN)HostPhyAddress;
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*DeviceAddress = HostPhyAddress;
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*Mapping = NULL;
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}
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return Status;
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}
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/**
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Frees memory that was allocated with AllocateBuffer().
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@param Pages The number of pages to free.
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@param HostAddress The base system memory address of the allocated range.
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@param Mapping The mapping value returned from Map().
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@retval EFI_SUCCESS The requested memory pages were freed.
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@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
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was not allocated with AllocateBuffer().
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**/
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EFI_STATUS
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IoMmuFreeBuffer (
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IN UINTN Pages,
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IN VOID *HostAddress,
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IN VOID *Mapping
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)
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{
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EFI_STATUS Status;
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if (mIoMmu != NULL) {
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Status = mIoMmu->SetAttribute (mIoMmu, Mapping, 0);
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Status = mIoMmu->Unmap (mIoMmu, Mapping);
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Status = mIoMmu->FreeBuffer (mIoMmu, Pages, HostAddress);
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} else {
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Status = EFI_SUCCESS;
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}
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return Status;
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}
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/**
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Allocates aligned pages that are suitable for an OperationBusMasterCommonBuffer or
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OperationBusMasterCommonBuffer64 mapping.
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@param Pages The number of pages to allocate.
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@param Alignment The requested alignment of the allocation. Must be a power of two.
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@param HostAddress A pointer to store the base system memory address of the
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allocated range.
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@param DeviceAddress The resulting map address for the bus master PCI controller to use to
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access the hosts HostAddress.
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@param Mapping A resulting value to pass to Unmap().
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@retval EFI_SUCCESS The requested memory pages were allocated.
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@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
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MEMORY_WRITE_COMBINE and MEMORY_CACHED.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
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**/
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EFI_STATUS
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IoMmuAllocateAlignedBuffer (
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IN UINTN Pages,
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IN UINTN Alignment,
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OUT VOID **HostAddress,
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OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
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OUT VOID **Mapping
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)
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{
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EFI_STATUS Status;
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VOID *Memory;
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UINTN AlignedMemory;
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UINTN AlignmentMask;
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UINTN UnalignedPages;
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UINTN RealPages;
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UINTN NumberOfBytes;
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EFI_PHYSICAL_ADDRESS HostPhyAddress;
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*HostAddress = NULL;
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*DeviceAddress = 0;
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AlignmentMask = Alignment - 1;
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//
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// Calculate the total number of pages since alignment is larger than page size.
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//
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RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);
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//
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// Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.
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//
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ASSERT (RealPages > Pages);
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if (mIoMmu != NULL) {
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Status = mIoMmu->AllocateBuffer (
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mIoMmu,
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EfiBootServicesData,
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RealPages,
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HostAddress,
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0
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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Memory = *HostAddress;
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AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;
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UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);
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if (UnalignedPages > 0) {
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//
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// Free first unaligned page(s).
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//
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Status = mIoMmu->FreeBuffer (
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mIoMmu,
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UnalignedPages,
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Memory);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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}
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Memory = (VOID *)(UINTN)(AlignedMemory + EFI_PAGES_TO_SIZE (Pages));
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UnalignedPages = RealPages - Pages - UnalignedPages;
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if (UnalignedPages > 0) {
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//
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// Free last unaligned page(s).
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//
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Status = mIoMmu->FreeBuffer (
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mIoMmu,
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UnalignedPages,
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Memory);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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}
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*HostAddress = (VOID *) AlignedMemory;
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NumberOfBytes = EFI_PAGES_TO_SIZE(Pages);
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Status = mIoMmu->Map (
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mIoMmu,
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EdkiiIoMmuOperationBusMasterCommonBuffer,
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*HostAddress,
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&NumberOfBytes,
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DeviceAddress,
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Mapping
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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Status = mIoMmu->SetAttribute (
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mIoMmu,
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*Mapping,
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EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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} else {
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Status = PeiServicesAllocatePages (
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EfiBootServicesData,
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RealPages,
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&HostPhyAddress
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);
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if (EFI_ERROR (Status)) {
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return EFI_OUT_OF_RESOURCES;
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}
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*HostAddress = (VOID *)(((UINTN) HostPhyAddress + AlignmentMask) & ~AlignmentMask);
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*DeviceAddress = ((UINTN) HostPhyAddress + AlignmentMask) & ~AlignmentMask;
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*Mapping = NULL;
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}
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return Status;
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}
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/**
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Initialize IOMMU.
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**/
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VOID
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IoMmuInit (
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VOID
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)
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{
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PeiServicesLocatePpi (
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&gEdkiiIoMmuPpiGuid,
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0,
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NULL,
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(VOID **)&mIoMmu
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);
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}
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