[edk2-platforms][PATCH V3 2/7] Platform/ARM/Morello: Add support for PciHostBridgeLib


chandni cherukuri
 

Morello FVP platform supports a PCIe root complex.
This patch implements PciHostBridgeLib to support PCIe.

Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
---
Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.inf | 48 ++++++
Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.c | 180 ++++++++++++++++++++
2 files changed, 228 insertions(+)

diff --git a/Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.inf b/Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.inf
new file mode 100644
index 000000000000..1d6c5b01d13d
--- /dev/null
+++ b/Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.inf
@@ -0,0 +1,48 @@
+## @file
+# PCI Host Bridge Library instance for ARM Morello FVP platform.
+#
+# Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = PciHostBridgeLib
+ FILE_GUID = 6879CEAD-DC94-42EB-895C-096D36B8083C
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PciHostBridgeLib|DXE_DRIVER
+
+#
+# The following information is for reference only and not required by the build
+# tools.
+#
+# VALID_ARCHITECTURES = AARCH64
+#
+
+[Sources]
+ PciHostBridgeLibFvp.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ Platform/ARM/Morello/MorelloPlatform.dec
+
+[FixedPcd]
+ gArmMorelloTokenSpaceGuid.PcdPciBusMax
+ gArmMorelloTokenSpaceGuid.PcdPciBusMin
+ gArmMorelloTokenSpaceGuid.PcdPciIoBase
+ gArmMorelloTokenSpaceGuid.PcdPciIoSize
+ gArmMorelloTokenSpaceGuid.PcdPciMmio32Base
+ gArmMorelloTokenSpaceGuid.PcdPciMmio32Size
+ gArmMorelloTokenSpaceGuid.PcdPciMmio64Base
+ gArmMorelloTokenSpaceGuid.PcdPciMmio64Size
+
+[Protocols]
+ gEfiCpuIo2ProtocolGuid ## CONSUMES
+
+[Depex]
+ gEfiCpuIo2ProtocolGuid
diff --git a/Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.c b/Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.c
new file mode 100644
index 000000000000..042cbbdca202
--- /dev/null
+++ b/Platform/ARM/Morello/Library/PciHostBridgeLib/PciHostBridgeLibFvp.c
@@ -0,0 +1,180 @@
+/** @file
+ PCI Host Bridge Library instance for ARM Morello FVP platform.
+
+ Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/PciHostBridgeLib.h>
+#include <Protocol/PciHostBridgeResourceAllocation.h>
+
+#define ROOT_COMPLEX_NUM 1
+
+GLOBAL_REMOVE_IF_UNREFERENCED
+STATIC CHAR16 CONST * CONST mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = {
+ L"Mem", L"I/O", L"Bus"
+};
+
+#pragma pack(1)
+typedef struct {
+ ACPI_HID_DEVICE_PATH AcpiDevicePath;
+ EFI_DEVICE_PATH_PROTOCOL EndDevicePath;
+} EFI_PCI_ROOT_BRIDGE_DEVICE_PATH;
+#pragma pack ()
+
+STATIC EFI_PCI_ROOT_BRIDGE_DEVICE_PATH mEfiPciRootBridgeDevicePath[ROOT_COMPLEX_NUM] = {
+ {
+ {
+ {
+ ACPI_DEVICE_PATH,
+ ACPI_DP,
+ {
+ (UINT8)sizeof (ACPI_HID_DEVICE_PATH),
+ (UINT8)(sizeof (ACPI_HID_DEVICE_PATH) >> 8)
+ }
+ },
+ EISA_PNP_ID(0x0A08),
+ 0
+ },
+ {
+ END_DEVICE_PATH_TYPE,
+ END_ENTIRE_DEVICE_PATH_SUBTYPE,
+ {
+ END_DEVICE_PATH_LENGTH,
+ 0
+ }
+ }
+ },
+};
+
+STATIC PCI_ROOT_BRIDGE mPciRootBridge[ROOT_COMPLEX_NUM] = {
+ {
+ 0, // Segment
+ 0, // Supports
+ 0, // Attributes
+ TRUE, // DmaAbove4G
+ FALSE, // NoExtendedConfigSpace
+ FALSE, // ResourceAssigned
+ EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM | // AllocationAttributes
+ EFI_PCI_HOST_BRIDGE_MEM64_DECODE,
+ {
+ // Bus
+ FixedPcdGet32 (PcdPciBusMin),
+ FixedPcdGet32 (PcdPciBusMax)
+ }, {
+ // Io
+ FixedPcdGet64 (PcdPciIoBase),
+ FixedPcdGet64 (PcdPciIoBase) + FixedPcdGet64 (PcdPciIoSize) - 1
+ }, {
+ // Mem
+ FixedPcdGet32 (PcdPciMmio32Base),
+ FixedPcdGet32 (PcdPciMmio32Base) + FixedPcdGet32 (PcdPciMmio32Size) - 1
+ }, {
+ // MemAbove4G
+ FixedPcdGet64 (PcdPciMmio64Base),
+ FixedPcdGet64 (PcdPciMmio64Base) + FixedPcdGet64 (PcdPciMmio64Size) - 1
+ }, {
+ // PMem
+ MAX_UINT64,
+ 0
+ }, {
+ // PMemAbove4G
+ MAX_UINT64,
+ 0
+ },
+ (EFI_DEVICE_PATH_PROTOCOL *)&mEfiPciRootBridgeDevicePath[0]
+ },
+};
+
+/**
+ Return all the root bridge instances in an array.
+
+ @param Count Return the count of root bridge instances.
+
+ @return All the root bridge instances in an array.
+ The array should be passed into PciHostBridgeFreeRootBridges()
+ when it's not used.
+**/
+PCI_ROOT_BRIDGE *
+EFIAPI
+PciHostBridgeGetRootBridges (
+ UINTN *Count
+ )
+{
+ *Count = ARRAY_SIZE (mPciRootBridge);
+ return mPciRootBridge;
+}
+
+/**
+ Free the root bridge instances array returned from PciHostBridgeGetRootBridges().
+
+ @param Bridges The root bridge instances array.
+ @param Count The count of the array.
+**/
+VOID
+EFIAPI
+PciHostBridgeFreeRootBridges (
+ PCI_ROOT_BRIDGE *Bridges,
+ UINTN Count
+ )
+{
+}
+
+/**
+ Inform the platform that the resource conflict happens.
+
+ @param HostBridgeHandle Handle of the Host Bridge.
+ @param 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
+PciHostBridgeResourceConflict (
+ EFI_HANDLE HostBridgeHandle,
+ 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 (mPciHostBridgeLibAcpiAddressSpaceTypeStr))
+ );
+ DEBUG ((DEBUG_ERROR, "%s: Length/Alignment = 0x%lx / 0x%lx\n",
+ mPciHostBridgeLibAcpiAddressSpaceTypeStr[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
+ );
+ }
+}
--
2.17.1

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