Silicon/RK3588: Fix MCFG when CFG0 TLPs are being correctly filtered

Some devices (either single or multi-function) manage to appear only once, so we
must expose the original ECAM base in this case, starting from dev 0.

edk2-rockchip/Silicon/Rockchip/RK3588/AcpiTables/Mcfg.aslc

@@ -9,27 +9,17 @@
  *
  **/
 
-#include <IndustryStandard/Acpi.h>
-#include <IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h>
 #include "AcpiTables.h"
 
-#pragma pack(push, 1)
-
 //
-// The root port config is not part of ECAM.
-// OSes can parse additional config spaces in MCFG, but we'll hide it for now.
+// MCFG may get patched by AcpiPlatformDxe.
 //
 
-typedef struct {
-  EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER Header;
-  EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE Entry[5];
-} EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE;
-
-EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE Mcfg = {
+RK3588_MCFG_TABLE Mcfg = {
   {
     ACPI_HEADER (
       EFI_ACPI_6_4_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE,
-      EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE,
+      RK3588_MCFG_TABLE,
       EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION
       ),
   },
@@ -72,6 +62,4 @@ EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_DESCRIPTION_TABLE Mcfg = {
   }
 };
 
-#pragma pack(pop)
-
 VOID* CONST ReferenceAcpiTable = &Mcfg;

edk2-rockchip/Silicon/Rockchip/RK3588/Drivers/AcpiPlatformDxe/AcpiPlatformDxe.c

@@ -12,6 +12,8 @@
 #include <Library/AcpiLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <AcpiTables.h>
 #include <VarStoreData.h>
 
 STATIC CONST EFI_GUID mAcpiTableFile = {
@@ -153,12 +155,26 @@ AcpiVerifyUpdateTable (
   return Result;
 }
 
-//
-// Monitor the ACPI tables being installed and when
-// a DSDT/SSDT is detected validate that we want to
-// install it, and if so update any "NameOp" defined
-// variables contained in the table from PCD values
-//
+STATIC
+BOOLEAN
+AcpiFixupMcfg (
+  IN  EFI_ACPI_DESCRIPTION_HEADER   *AcpiHeader
+  )
+{
+  RK3588_MCFG_TABLE   *Table;
+  UINT32              Seg;
+
+  Table = (RK3588_MCFG_TABLE *) AcpiHeader;
+
+  for (Seg = 0; Seg < ARRAY_SIZE (Table->Entry); Seg++) {
+    if ((PcdGet32 (PcdPcieEcamCompliantSegmentsMask) & (1 << Seg)) != 0) {
+      Table->Entry[Seg].BaseAddress -= 0x8000;
+    }
+  }
+
+  return TRUE;
+}
+
 STATIC
 BOOLEAN
 AcpiHandleDynamicNamespace (
@@ -169,11 +185,30 @@ AcpiHandleDynamicNamespace (
     case SIGNATURE_32 ('D', 'S', 'D', 'T'):
     case SIGNATURE_32 ('S', 'S', 'D', 'T'):
       return AcpiVerifyUpdateTable (AcpiHeader);
+    case SIGNATURE_32 ('M', 'C', 'F', 'G'):
+      return AcpiFixupMcfg (AcpiHeader);
   }
 
   return TRUE;
 }
 
+STATIC
+VOID
+EFIAPI
+NotifyEndOfDxeEvent (
+  IN EFI_EVENT    Event,
+  IN VOID         *Context
+  )
+{
+  EFI_STATUS    Status;
+
+  Status = LocateAndInstallAcpiFromFvConditional (&mAcpiTableFile, &AcpiHandleDynamicNamespace);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_WARN, "AcpiPlatform: Failed to install firmware ACPI as config table. Status=%r\n",
+            Status));
+  }
+}
+
 EFI_STATUS
 EFIAPI
 AcpiPlatformDxeInitialize (
@@ -182,18 +217,22 @@ AcpiPlatformDxeInitialize (
   )
 {
   EFI_STATUS    Status;
+  EFI_EVENT     Event;
 
   if ((PcdGet32 (PcdConfigTableMode) & CONFIG_TABLE_MODE_ACPI) == 0) {
     DEBUG ((DEBUG_WARN, "AcpiPlatform: ACPI support is disabled by the settings.\n"));
     return EFI_UNSUPPORTED;
   }
 
-  Status = LocateAndInstallAcpiFromFvConditional (&mAcpiTableFile, &AcpiHandleDynamicNamespace);
-  if (EFI_ERROR (Status)) {
-    DEBUG ((DEBUG_WARN, "AcpiPlatform: Failed to install firmware ACPI as config table. Status=%r\n",
-            Status));
-    return Status;
-  }
+  Status = gBS->CreateEventEx (
+                    EVT_NOTIFY_SIGNAL,                // Type
+                    TPL_CALLBACK,                     // NotifyTpl
+                    NotifyEndOfDxeEvent,              // NotifyFunction
+                    NULL,                             // NotifyContext
+                    &gEfiEndOfDxeEventGroupGuid,      // EventGroup
+                    &Event                            // Event
+                    );
+  ASSERT_EFI_ERROR (Status);
 
   return EFI_SUCCESS;
 }

edk2-rockchip/Silicon/Rockchip/RK3588/Drivers/AcpiPlatformDxe/AcpiPlatformDxe.inf

@@ -30,9 +30,11 @@
   AcpiLib
   BaseMemoryLib
   DebugLib
+  UefiBootServicesTableLib
   UefiDriverEntryPoint
 
 [Guids]
+  gEfiEndOfDxeEventGroupGuid
 
 [Protocols]
 
@@ -44,6 +46,7 @@
   gRK3588TokenSpaceGuid.PcdComboPhy2Mode
   gRK3588TokenSpaceGuid.PcdPcie30Supported
   gRK3588TokenSpaceGuid.PcdPcie30State
+  gRK3588TokenSpaceGuid.PcdPcieEcamCompliantSegmentsMask
 
 [Depex]
   gRockchipPlatformConfigAppliedProtocolGuid

edk2-rockchip/Silicon/Rockchip/RK3588/Include/AcpiTables.h

@@ -15,6 +15,7 @@
 #define __ACPITABLES_H__
 
 #include <IndustryStandard/Acpi.h>
+#include <IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h>
 
 #define EFI_ACPI_OEM_ID                       {'R','K','C','P',' ',' '}
 
@@ -58,4 +59,11 @@
     0                                                                         \
   }
 
+#pragma pack(push, 1)
+typedef struct {
+  EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER Header;
+  EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE Entry[5];
+} RK3588_MCFG_TABLE;
+#pragma pack(pop)
+
 #endif // __ACPITABLES_H__

edk2-rockchip/Silicon/Rockchip/RK3588/Library/Rk3588PciHostBridgeLib/PciHostBridgeInit.c

@@ -197,7 +197,7 @@ PciePinmuxInit(
       ASSERT(MuxNum < 2);
       GpioSetIomuxConfig(&mPcie20x1_2_IomuxConfigs[MuxNum][0], 3);
       break;
-    
+
     default:
       return;
   }
@@ -255,7 +255,7 @@ PciSetupClocks (
 		default:
 			break;
 	}
-	
+
 }
 
 STATIC
@@ -448,6 +448,29 @@ PciSetupAtu (
   gBS->Stall (10000);
 }
 
+STATIC
+VOID
+PciValidateCfg0 (
+  IN  UINT32                 Segment,
+  IN  EFI_PHYSICAL_ADDRESS   Cfg0Base
+  )
+{
+  EFI_STATUS Status;
+
+  //
+  // If the downstream device doesn't appear mirrored, config accesses
+  // must not be shifted by 0x8000 anymore.
+  //
+  if (MmioRead32 (Cfg0Base) != 0xffffffff
+      && MmioRead32 (Cfg0Base + 0x8000) == 0xffffffff) {
+    Status = PcdSet32S (PcdPcieEcamCompliantSegmentsMask,
+                PcdGet32 (PcdPcieEcamCompliantSegmentsMask) | (1 << Segment));
+    ASSERT_EFI_ERROR (Status);
+
+    DEBUG((DEBUG_INFO, "PCIe: Working CFG0 TLP filtering for connected device!\n"));
+  }
+}
+
 EFI_STATUS
 InitializePciHost (
   UINT32 Segment
@@ -564,5 +587,7 @@ InitializePciHost (
   PciGetLinkSpeedWidth (DbiBase, &LinkSpeed, &LinkWidth);
   PciPrintLinkSpeedWidth (LinkSpeed, LinkWidth);
 
+  PciValidateCfg0 (Segment, PcieBase + Cfg0Base);
+
   return EFI_SUCCESS;
 }

edk2-rockchip/Silicon/Rockchip/RK3588/Library/Rk3588PciHostBridgeLib/Rk3588PciHostBridgeLib.inf

@@ -51,3 +51,5 @@
   gRK3588TokenSpaceGuid.PcdComboPhy2Mode
 
   gRK3588TokenSpaceGuid.PcdPcie30State
+
+  gRK3588TokenSpaceGuid.PcdPcieEcamCompliantSegmentsMask

edk2-rockchip/Silicon/Rockchip/RK3588/RK3588.dec

@@ -88,3 +88,6 @@
 
   gRK3588TokenSpaceGuid.PcdUsbDpPhy0Usb3State|0|UINT32|0x00000501
   gRK3588TokenSpaceGuid.PcdUsbDpPhy1Usb3State|0|UINT32|0x00000502
+
+[PcdsDynamicEx]
+  gRK3588TokenSpaceGuid.PcdPcieEcamCompliantSegmentsMask|0|UINT32|0x20000001