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| author | Sami Mujawar <sami.mujawar@arm.com> | 2021-06-15 16:21:27 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-06-22 17:04:45 +0000 |
| commit | 5959879e92d45ad8c0a9d984e46dd01641914942 (patch) | |
| tree | 16df8dc01830bb0f8e1bae8c5aee1af4148966e5 /ArmVirtPkg | |
| parent | d9a7612f8d1da197883bd1cb9f91f229522d39b1 (diff) | |
| download | edk2-5959879e92d45ad8c0a9d984e46dd01641914942.tar.gz edk2-5959879e92d45ad8c0a9d984e46dd01641914942.tar.bz2 edk2-5959879e92d45ad8c0a9d984e46dd01641914942.zip | |
ArmVirtPkg: Add PCIe host bridge utility lib for ArmVirtPkg
PCIe support has been added to Kvmtool Virtual Machine Manager.
The PCI host bridge utility lib is used to retrieve information
about the Root Bridges in a platform.
Therefore, add an instance of PciHostBridgeUtilityLib as this is
required to enable PCIe support for Kvmtool firmware.
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Alexandru Elisei <alexandru.elisei@arm.com>
Diffstat (limited to 'ArmVirtPkg')
| -rw-r--r-- | ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.c | 218 | ||||
| -rw-r--r-- | ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.inf | 39 |
2 files changed, 257 insertions, 0 deletions
diff --git a/ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.c b/ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.c new file mode 100644 index 0000000000..90962caffd --- /dev/null +++ b/ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.c @@ -0,0 +1,218 @@ +/** @file
+ PCI Host Bridge utility functions for ArmVirt.
+
+ Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <IndustryStandard/Acpi10.h>
+#include <IndustryStandard/Pci.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PciHostBridgeLib.h>
+#include <Library/PciHostBridgeUtilityLib.h>
+#include <Library/PciLib.h>
+
+#pragma pack(1)
+typedef struct {
+ ACPI_HID_DEVICE_PATH AcpiDevicePath;
+ EFI_DEVICE_PATH_PROTOCOL EndDevicePath;
+} EFI_PCI_ROOT_BRIDGE_DEVICE_PATH;
+#pragma pack ()
+
+GLOBAL_REMOVE_IF_UNREFERENCED
+CHAR16 *mPciHostBridgeAcpiAddressSpaceTypeStr[] = {
+ L"Mem",
+ L"I/O",
+ L"Bus"
+};
+
+STATIC CONST EFI_PCI_ROOT_BRIDGE_DEVICE_PATH mEfiPciRootBridgeDevicePath = {
+ {
+ {
+ ACPI_DEVICE_PATH,
+ ACPI_DP,
+ {
+ (UINT8) (sizeof (ACPI_HID_DEVICE_PATH)),
+ (UINT8) ((sizeof (ACPI_HID_DEVICE_PATH)) >> 8)
+ }
+ },
+ EISA_PNP_ID (0x0A03), // HID
+ 0 // UID
+ },
+
+ {
+ END_DEVICE_PATH_TYPE,
+ END_ENTIRE_DEVICE_PATH_SUBTYPE,
+ {
+ END_DEVICE_PATH_LENGTH,
+ 0
+ }
+ }
+};
+
+
+GLOBAL_REMOVE_IF_UNREFERENCED
+CHAR16 *mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = {
+ L"Mem", L"I/O", L"Bus"
+};
+
+STATIC PCI_ROOT_BRIDGE mRootBridge;
+
+/**
+ Utility function to return all the root bridge instances in an array.
+
+ @param [out] Count The number of root bridge instances.
+ @param [in] Attributes Initial attributes.
+ @param [in] AllocationAttributes Allocation attributes.
+ @param [in] DmaAbove4G DMA above 4GB memory.
+ @param [in] NoExtendedConfigSpace No Extended Config Space.
+ @param [in] BusMin Minimum Bus number, inclusive.
+ @param [in] BusMax Maximum Bus number, inclusive.
+ @param [in] Io IO aperture.
+ @param [in] Mem MMIO aperture.
+ @param [in] MemAbove4G MMIO aperture above 4G.
+ @param [in] PMem Prefetchable MMIO aperture.
+ @param [in] PMemAbove4G Prefetchable MMIO aperture above 4G.
+
+ @return All the root bridge instances in an array.
+**/
+PCI_ROOT_BRIDGE *
+EFIAPI
+PciHostBridgeUtilityGetRootBridges (
+ OUT UINTN *Count,
+ IN UINT64 Attributes,
+ IN UINT64 AllocationAttributes,
+ IN BOOLEAN DmaAbove4G,
+ IN BOOLEAN NoExtendedConfigSpace,
+ IN UINTN BusMin,
+ IN UINTN BusMax,
+ IN PCI_ROOT_BRIDGE_APERTURE *Io,
+ IN PCI_ROOT_BRIDGE_APERTURE *Mem,
+ IN PCI_ROOT_BRIDGE_APERTURE *MemAbove4G,
+ IN PCI_ROOT_BRIDGE_APERTURE *PMem,
+ IN PCI_ROOT_BRIDGE_APERTURE *PMemAbove4G
+ )
+{
+ if ((Count == NULL) ||
+ (Io == NULL) ||
+ (Mem == NULL) ||
+ (MemAbove4G == NULL) ||
+ (PMem == NULL) ||
+ (PMemAbove4G == NULL)) {
+ return NULL;
+ }
+
+
+ *Count = 1;
+
+ mRootBridge.Segment = 0;
+ mRootBridge.Supports = Attributes;
+ mRootBridge.Attributes = Attributes;
+
+ mRootBridge.DmaAbove4G = DmaAbove4G;
+ mRootBridge.NoExtendedConfigSpace = NoExtendedConfigSpace;
+ mRootBridge.ResourceAssigned = FALSE;
+
+ mRootBridge.AllocationAttributes = AllocationAttributes;
+
+ mRootBridge.Bus.Base = BusMin;
+ mRootBridge.Bus.Limit = BusMax;
+ mRootBridge.Io.Base = Io->Base;
+ mRootBridge.Io.Limit = Io->Limit;
+ mRootBridge.Mem.Base = Mem->Base;
+ mRootBridge.Mem.Limit = Mem->Limit;
+ mRootBridge.MemAbove4G.Base = MemAbove4G->Base;
+ mRootBridge.MemAbove4G.Limit = MemAbove4G->Limit;
+ mRootBridge.PMem.Base = PMem->Base;
+ mRootBridge.PMem.Limit = PMem->Limit;
+ mRootBridge.PMemAbove4G.Base = PMemAbove4G->Base;
+ mRootBridge.PMemAbove4G.Limit = PMemAbove4G->Limit;
+
+ mRootBridge.DevicePath =
+ (EFI_DEVICE_PATH_PROTOCOL*)&mEfiPciRootBridgeDevicePath;
+
+ return &mRootBridge;
+}
+
+/**
+ Utility function to free root bridge instances array from
+ PciHostBridgeUtilityGetRootBridges().
+
+ @param[in] Bridges The root bridge instances array.
+ @param[in] Count The count of the array.
+**/
+VOID
+EFIAPI
+PciHostBridgeUtilityFreeRootBridges (
+ IN PCI_ROOT_BRIDGE *Bridges,
+ IN UINTN Count
+ )
+{
+ // Nothing to do here.
+}
+
+/**
+ Utility function to inform the platform that the resource conflict happens.
+
+ @param[in] Configuration Pointer to PCI I/O and PCI memory resource
+ descriptors. The Configuration contains the
+ resources for all the root bridges. The resource
+ for each root bridge is terminated with END
+ descriptor and an additional END is appended
+ indicating the end of the entire resources. The
+ resource descriptor field values follow the
+ description in
+ EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
+ .SubmitResources().
+**/
+VOID
+EFIAPI
+PciHostBridgeUtilityResourceConflict (
+ IN VOID *Configuration
+ )
+{
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor;
+ UINTN RootBridgeIndex;
+ DEBUG ((DEBUG_ERROR, "PciHostBridge: Resource conflict happens!\n"));
+
+ RootBridgeIndex = 0;
+ Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR*)Configuration;
+ while (Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
+ DEBUG ((DEBUG_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++));
+ for (; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) {
+ ASSERT (Descriptor->ResType <
+ ARRAY_SIZE (mPciHostBridgeAcpiAddressSpaceTypeStr)
+ );
+ DEBUG ((
+ DEBUG_ERROR,
+ " %s: Length/Alignment = 0x%lx / 0x%lx\n",
+ mPciHostBridgeAcpiAddressSpaceTypeStr[Descriptor->ResType],
+ Descriptor->AddrLen,
+ Descriptor->AddrRangeMax
+ ));
+ if (Descriptor->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) {
+ DEBUG ((
+ DEBUG_ERROR,
+ " Granularity/SpecificFlag = %ld / %02x%s\n",
+ Descriptor->AddrSpaceGranularity,
+ Descriptor->SpecificFlag,
+ ((Descriptor->SpecificFlag &
+ EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE
+ ) != 0) ? L" (Prefetchable)" : L""
+ ));
+ }
+ }
+ //
+ // Skip the END descriptor for root bridge
+ //
+ ASSERT (Descriptor->Desc == ACPI_END_TAG_DESCRIPTOR);
+ Descriptor = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR*)(
+ (EFI_ACPI_END_TAG_DESCRIPTOR*)Descriptor + 1
+ );
+ }
+}
diff --git a/ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.inf b/ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.inf new file mode 100644 index 0000000000..80fdd2b1e5 --- /dev/null +++ b/ArmVirtPkg/Library/ArmVirtPciHostBridgeUtilityLib/ArmVirtPciHostBridgeUtilityLib.inf @@ -0,0 +1,39 @@ +## @file
+# PciHostBridgeLib utility functions for ArmVirt.
+#
+# Copyright (c) 2021, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = ArmVirtPciHostBridgeUtilityLib
+ FILE_GUID = 22A8844E-2AE7-4BF1-91FA-6EFDE3FE540C
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PciHostBridgeUtilityLib
+
+#
+# The following information is for reference only and not required by the build
+# tools.
+#
+# VALID_ARCHITECTURES = AARCH64 ARM
+#
+
+[Sources]
+ ArmVirtPciHostBridgeUtilityLib.c
+
+[Packages]
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ BaseMemoryLib
+ DebugLib
+ DevicePathLib
+ MemoryAllocationLib
+ PciLib
|