diff options
Diffstat (limited to 'roms/edk2/MdeModulePkg/Bus/Ata/AhciPei/DmaMem.c')
| -rw-r--r-- | roms/edk2/MdeModulePkg/Bus/Ata/AhciPei/DmaMem.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/roms/edk2/MdeModulePkg/Bus/Ata/AhciPei/DmaMem.c b/roms/edk2/MdeModulePkg/Bus/Ata/AhciPei/DmaMem.c new file mode 100644 index 000000000..3a506d8c2 --- /dev/null +++ b/roms/edk2/MdeModulePkg/Bus/Ata/AhciPei/DmaMem.c @@ -0,0 +1,263 @@ +/** @file
+ The DMA memory help function.
+
+ Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "AhciPei.h"
+
+/**
+ Get IOMMU PPI.
+
+ @return Pointer to IOMMU PPI.
+
+**/
+EDKII_IOMMU_PPI *
+GetIoMmu (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EDKII_IOMMU_PPI *IoMmu;
+
+ IoMmu = NULL;
+ Status = PeiServicesLocatePpi (
+ &gEdkiiIoMmuPpiGuid,
+ 0,
+ NULL,
+ (VOID **) &IoMmu
+ );
+ if (!EFI_ERROR (Status) && (IoMmu != NULL)) {
+ return IoMmu;
+ }
+
+ return NULL;
+}
+
+/**
+ Provides the controller-specific addresses required to access system memory from a
+ DMA bus master.
+
+ @param Operation Indicates if the bus master is going to read or write to system memory.
+ @param HostAddress The system memory address to map to the PCI controller.
+ @param NumberOfBytes On input the number of bytes to map. On output the number of bytes
+ that were mapped.
+ @param DeviceAddress The resulting map address for the bus master PCI controller to use to
+ access the hosts HostAddress.
+ @param Mapping A resulting value to pass to Unmap().
+
+ @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
+ @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+ @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
+
+**/
+EFI_STATUS
+IoMmuMap (
+ IN EDKII_IOMMU_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+{
+ EFI_STATUS Status;
+ UINT64 Attribute;
+ EDKII_IOMMU_PPI *IoMmu;
+
+ IoMmu = GetIoMmu ();
+
+ if (IoMmu != NULL) {
+ Status = IoMmu->Map (
+ IoMmu,
+ Operation,
+ HostAddress,
+ NumberOfBytes,
+ DeviceAddress,
+ Mapping
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ switch (Operation) {
+ case EdkiiIoMmuOperationBusMasterRead:
+ case EdkiiIoMmuOperationBusMasterRead64:
+ Attribute = EDKII_IOMMU_ACCESS_READ;
+ break;
+ case EdkiiIoMmuOperationBusMasterWrite:
+ case EdkiiIoMmuOperationBusMasterWrite64:
+ Attribute = EDKII_IOMMU_ACCESS_WRITE;
+ break;
+ case EdkiiIoMmuOperationBusMasterCommonBuffer:
+ case EdkiiIoMmuOperationBusMasterCommonBuffer64:
+ Attribute = EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE;
+ break;
+ default:
+ ASSERT(FALSE);
+ return EFI_INVALID_PARAMETER;
+ }
+ Status = IoMmu->SetAttribute (
+ IoMmu,
+ *Mapping,
+ Attribute
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ } else {
+ *DeviceAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress;
+ *Mapping = NULL;
+ Status = EFI_SUCCESS;
+ }
+ return Status;
+}
+
+/**
+ Completes the Map() operation and releases any corresponding resources.
+
+ @param Mapping The mapping value returned from Map().
+
+ @retval EFI_SUCCESS The range was unmapped.
+ @retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().
+ @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.
+**/
+EFI_STATUS
+IoMmuUnmap (
+ IN VOID *Mapping
+ )
+{
+ EFI_STATUS Status;
+ EDKII_IOMMU_PPI *IoMmu;
+
+ IoMmu = GetIoMmu ();
+
+ if (IoMmu != NULL) {
+ Status = IoMmu->SetAttribute (IoMmu, Mapping, 0);
+ Status = IoMmu->Unmap (IoMmu, Mapping);
+ } else {
+ Status = EFI_SUCCESS;
+ }
+ return Status;
+}
+
+/**
+ Allocates pages that are suitable for an OperationBusMasterCommonBuffer or
+ OperationBusMasterCommonBuffer64 mapping.
+
+ @param Pages The number of pages to allocate.
+ @param HostAddress A pointer to store the base system memory address of the
+ allocated range.
+ @param DeviceAddress The resulting map address for the bus master PCI controller to use to
+ access the hosts HostAddress.
+ @param Mapping A resulting value to pass to Unmap().
+
+ @retval EFI_SUCCESS The requested memory pages were allocated.
+ @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
+ MEMORY_WRITE_COMBINE and MEMORY_CACHED.
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
+ @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
+
+**/
+EFI_STATUS
+IoMmuAllocateBuffer (
+ IN UINTN Pages,
+ OUT VOID **HostAddress,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ )
+{
+ EFI_STATUS Status;
+ UINTN NumberOfBytes;
+ EFI_PHYSICAL_ADDRESS HostPhyAddress;
+ EDKII_IOMMU_PPI *IoMmu;
+
+ *HostAddress = NULL;
+ *DeviceAddress = 0;
+
+ IoMmu = GetIoMmu ();
+
+ if (IoMmu != NULL) {
+ Status = IoMmu->AllocateBuffer (
+ IoMmu,
+ EfiBootServicesData,
+ Pages,
+ HostAddress,
+ 0
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ NumberOfBytes = EFI_PAGES_TO_SIZE(Pages);
+ Status = IoMmu->Map (
+ IoMmu,
+ EdkiiIoMmuOperationBusMasterCommonBuffer,
+ *HostAddress,
+ &NumberOfBytes,
+ DeviceAddress,
+ Mapping
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ Status = IoMmu->SetAttribute (
+ IoMmu,
+ *Mapping,
+ EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ } else {
+ Status = PeiServicesAllocatePages (
+ EfiBootServicesData,
+ Pages,
+ &HostPhyAddress
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ *HostAddress = (VOID *)(UINTN)HostPhyAddress;
+ *DeviceAddress = HostPhyAddress;
+ *Mapping = NULL;
+ }
+ return Status;
+}
+
+/**
+ Frees memory that was allocated with AllocateBuffer().
+
+ @param Pages The number of pages to free.
+ @param HostAddress The base system memory address of the allocated range.
+ @param Mapping The mapping value returned from Map().
+
+ @retval EFI_SUCCESS The requested memory pages were freed.
+ @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
+ was not allocated with AllocateBuffer().
+
+**/
+EFI_STATUS
+IoMmuFreeBuffer (
+ IN UINTN Pages,
+ IN VOID *HostAddress,
+ IN VOID *Mapping
+ )
+{
+ EFI_STATUS Status;
+ EDKII_IOMMU_PPI *IoMmu;
+
+ IoMmu = GetIoMmu ();
+
+ if (IoMmu != NULL) {
+ Status = IoMmu->SetAttribute (IoMmu, Mapping, 0);
+ Status = IoMmu->Unmap (IoMmu, Mapping);
+ Status = IoMmu->FreeBuffer (IoMmu, Pages, HostAddress);
+ } else {
+ Status = EFI_SUCCESS;
+ }
+ return Status;
+}
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