Re: [edk2-platform][PATCH v3] MinPlatformPkg: Add multiple segment support for PciHostBridgeLib

["Chaganty, Rangasai V" <rangasai.v.chaganty@intel.com>]

Reviewed-by: Rangasai V Chaganty <rangasai.v.chaganty@intel.com> 

-----Original Message-----
From: Chen, Marc W 
Sent: Friday, May 17, 2019 12:53 AM
To: devel@edk2.groups.io
Cc: Chen, Marc W <marc.w.chen@intel.com>; Kubacki, Michael A <michael.a.kubacki@intel.com>; Chaganty, Rangasai V <rangasai.v.chaganty@intel.com>
Subject: [edk2-platform][PATCH v3] MinPlatformPkg: Add multiple segment support for PciHostBridgeLib

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1799

1. Add PcdPciSegmentCount PCD in MinPlatformPkg.dec and set default to 1 2. Base on PciHostBridge related PCDs to Initialize RootBridges.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marc Chen <marc.w.chen@intel.com>
Cc: Michael Kubacki <michael.a.kubacki@intel.com>
Cc: Sai Chaganty <rangasai.v.chaganty@intel.com>
---
 Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec   |  3 +-
 .../PciHostBridgeLibSimple.c                       | 83 ++++++++++++++--------
 .../PciHostBridgeLibSimple.inf                     |  4 +-
 3 files changed, 59 insertions(+), 31 deletions(-)

diff --git a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
index 3185776ac3..e1ae8004cb 100644
--- a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
+++ b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dec
@@ -6,7 +6,7 @@
 # INF files to generate AutoGen.c and AutoGen.h files  # for the build infrastructure.
 #
-# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017 - 2019, Intel Corporation. All rights 
+reserved.<BR>
 #
 # This program and the accompanying materials are licensed and made available under  # the terms and conditions of the BSD License which accompanies this distribution.
@@ -223,6 +223,7 @@ gMinPlatformPkgTokenSpaceGuid.PcdPcIoApicEnable|0x0|UINT32|0x90000019
   gMinPlatformPkgTokenSpaceGuid.PcdPciDmaAbove4G               |FALSE|BOOLEAN|0x4001004B
   gMinPlatformPkgTokenSpaceGuid.PcdPciNoExtendedConfigSpace    |FALSE|BOOLEAN|0x4001004C
   gMinPlatformPkgTokenSpaceGuid.PcdPciResourceAssigned         |FALSE|BOOLEAN|0x4001004D
+  gMinPlatformPkgTokenSpaceGuid.PcdPciSegmentCount             |0x1    |UINT8|0x4001004E
 
   gMinPlatformPkgTokenSpaceGuid.PcdAcpiPm1AEventBlockAddress|0x1800|UINT16|0x00010035
   gMinPlatformPkgTokenSpaceGuid.PcdAcpiPm1BEventBlockAddress|0x0000|UINT16|0x00010036
diff --git a/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.c b/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.c
index 557ac2a5b3..25259e2f2d 100644
--- a/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.c
+++ b/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/P
+++ ciHostBridgeLibSimple.c
@@ -1,7 +1,7 @@
 /** @file
-  SA PciHostBridge Library
+  PciHostBridge Library
 
-Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials are licensed and made available under  the terms and conditions of the BSD License that accompanies this distribution.
 The full text of the license may be found at @@ -15,6 +15,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <IndustryStandard/Pci.h>
 #include <Protocol/PciHostBridgeResourceAllocation.h>
 #include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
 #include <Library/DevicePathLib.h>
 #include <Library/MemoryAllocationLib.h>  #include <Library/PcdLib.h> @@ -28,7 +29,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 GLOBAL_REMOVE_IF_UNREFERENCED CHAR16 *mPciHostBridgeLibAcpiAddressSpaceTypeStr[] = {
   L"Mem", L"I/O", L"Bus"
 };
-ACPI_HID_DEVICE_PATH mRootBridgeDeviceNode = {
+ACPI_HID_DEVICE_PATH mRootBridgeDeviceNodeTemplate = {
   {
     ACPI_DEVICE_PATH,
     ACPI_DP,
@@ -41,7 +42,7 @@ ACPI_HID_DEVICE_PATH mRootBridgeDeviceNode = {
   0
 };
 
-PCI_ROOT_BRIDGE mRootBridge = {
+PCI_ROOT_BRIDGE mRootBridgeTemplate = {
   0,
   EFI_PCI_ATTRIBUTE_ISA_MOTHERBOARD_IO |
   EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO |
@@ -66,41 +67,67 @@ PCI_ROOT_BRIDGE mRootBridge = {
   NULL // DevicePath;
 };
 
+/**
+  Return all the root bridge instances.
+
+  @param Count  Return the count of root bridge instances.
+
+  @return All the root bridge instances, it will be NULL if system has insufficient memory
+          resources available and count will be zero.
+**/
+
 PCI_ROOT_BRIDGE *
 EFIAPI
 PciHostBridgeGetRootBridges (
   UINTN                                 *Count
   )
 {
-  mRootBridge.Mem.Base = PcdGet32 (PcdPciReservedMemBase);
+  UINT8 Index;
+  PCI_ROOT_BRIDGE *RootBridge;
+
+  RootBridge = AllocateZeroPool (sizeof (PCI_ROOT_BRIDGE) * PcdGet8 
+ (PcdPciSegmentCount));  if (RootBridge == NULL) {
+    DEBUG ((DEBUG_ERROR, "PciHostBridge: Out of resource\n"));
+    *Count = 0;
+    return RootBridge;
+  }
+
+  mRootBridgeTemplate.Mem.Base = PcdGet32 (PcdPciReservedMemBase);
   if (PcdGet32(PcdPciReservedMemLimit) != 0) {
-    mRootBridge.Mem.Limit = PcdGet32 (PcdPciReservedMemLimit);
+    mRootBridgeTemplate.Mem.Limit = PcdGet32 (PcdPciReservedMemLimit);
   } else {
-    mRootBridge.Mem.Limit = (UINT32)PcdGet64 (PcdPciExpressBaseAddress);
+    mRootBridgeTemplate.Mem.Limit = (UINT32) PcdGet64 
+ (PcdPciExpressBaseAddress);
   }
 
-  mRootBridge.MemAbove4G.Base = PcdGet64 (PcdPciReservedMemAbove4GBBase);
-  mRootBridge.MemAbove4G.Limit = PcdGet64 (PcdPciReservedMemAbove4GBLimit);
+  mRootBridgeTemplate.MemAbove4G.Base = PcdGet64 
+ (PcdPciReservedMemAbove4GBBase);  mRootBridgeTemplate.MemAbove4G.Limit 
+ = PcdGet64 (PcdPciReservedMemAbove4GBLimit);
   
-  mRootBridge.PMem.Base = PcdGet32 (PcdPciReservedPMemBase);
-  mRootBridge.PMem.Limit = PcdGet32 (PcdPciReservedPMemLimit);
-  mRootBridge.PMemAbove4G.Base = PcdGet64 (PcdPciReservedPMemAbove4GBBase);
-  mRootBridge.PMemAbove4G.Limit = PcdGet64 (PcdPciReservedPMemAbove4GBLimit);
+  mRootBridgeTemplate.PMem.Base = PcdGet32 (PcdPciReservedPMemBase);  
+ mRootBridgeTemplate.PMem.Limit = PcdGet32 (PcdPciReservedPMemLimit);  
+ mRootBridgeTemplate.PMemAbove4G.Base = PcdGet64 
+ (PcdPciReservedPMemAbove4GBBase);  
+ mRootBridgeTemplate.PMemAbove4G.Limit = PcdGet64 
+ (PcdPciReservedPMemAbove4GBLimit);
 
-  if (mRootBridge.MemAbove4G.Base < mRootBridge.MemAbove4G.Limit) {
-    mRootBridge.AllocationAttributes |= EFI_PCI_HOST_BRIDGE_MEM64_DECODE;
+  if (mRootBridgeTemplate.MemAbove4G.Base < mRootBridgeTemplate.MemAbove4G.Limit) {
+    mRootBridgeTemplate.AllocationAttributes |= 
+ EFI_PCI_HOST_BRIDGE_MEM64_DECODE;
   }
 
-  mRootBridge.Io.Base = PcdGet16 (PcdPciReservedIobase);
-  mRootBridge.Io.Limit = PcdGet16 (PcdPciReservedIoLimit);
+  mRootBridgeTemplate.Io.Base = PcdGet16 (PcdPciReservedIobase);  
+ mRootBridgeTemplate.Io.Limit = PcdGet16 (PcdPciReservedIoLimit);
 
-  mRootBridge.DmaAbove4G = PcdGetBool (PcdPciDmaAbove4G);
-  mRootBridge.NoExtendedConfigSpace = PcdGetBool (PcdPciNoExtendedConfigSpace);
-  mRootBridge.ResourceAssigned = PcdGetBool (PcdPciResourceAssigned);
+  mRootBridgeTemplate.DmaAbove4G = PcdGetBool (PcdPciDmaAbove4G);  
+ mRootBridgeTemplate.NoExtendedConfigSpace = PcdGetBool 
+ (PcdPciNoExtendedConfigSpace);  mRootBridgeTemplate.ResourceAssigned = 
+ PcdGetBool (PcdPciResourceAssigned);
+
+  for (Index = 0; Index < PcdGet8 (PcdPciSegmentCount); Index ++) {
+    mRootBridgeDeviceNodeTemplate.UID = Index;
+    mRootBridgeTemplate.Segment = Index;
+    mRootBridgeTemplate.DevicePath = NULL;
+    mRootBridgeTemplate.DevicePath = AppendDevicePathNode (NULL, &mRootBridgeDeviceNodeTemplate.Header);
+    CopyMem (RootBridge + Index, &mRootBridgeTemplate, sizeof 
+ (PCI_ROOT_BRIDGE));  }
 
-  mRootBridge.DevicePath = AppendDevicePathNode (NULL, &mRootBridgeDeviceNode.Header);
-  *Count = 1;
-  return &mRootBridge;
+  *Count = PcdGet8 (PcdPciSegmentCount);  return RootBridge;
 }
 
 VOID
@@ -110,7 +137,7 @@ PciHostBridgeFreeRootBridges (
   UINTN           Count
   )
 {
-  ASSERT (Count == 1);
+  ASSERT (Count <= PcdGet8 (PcdPciSegmentCount));
   FreePool (Bridges->DevicePath);
 }
 
@@ -136,20 +163,20 @@ PciHostBridgeResourceConflict (
 {
   EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor;
   UINTN                             RootBridgeIndex;
-  DEBUG ((EFI_D_ERROR, "PciHostBridge: Resource conflict happens!\n"));
+  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 ((EFI_D_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++));
+    DEBUG ((DEBUG_ERROR, "RootBridge[%d]:\n", RootBridgeIndex++));
     for (; Descriptor->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR; Descriptor++) {
       ASSERT (Descriptor->ResType <
               sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr) / sizeof (mPciHostBridgeLibAcpiAddressSpaceTypeStr[0])
               );
-      DEBUG ((EFI_D_ERROR, " %s: Length/Alignment = 0x%lx / 0x%lx\n",
+      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 ((EFI_D_ERROR, "     Granularity/SpecificFlag = %ld / %02x%s\n",
+        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""
                 ));
diff --git a/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.inf b/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.inf
index f9a769155b..b37488e512 100644
--- a/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.inf
+++ b/Platform/Intel/MinPlatformPkg/Pci/Library/PciHostBridgeLibSimple/PciHostBridgeLibSimple.inf
@@ -1,7 +1,7 @@
 ## @file
 #  Component description file for the SA PciHostBridge library
 #
-# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>
 #
 # This program and the accompanying materials are licensed and made available under
 # the terms and conditions of the BSD License which accompanies this distribution.
@@ -56,4 +56,4 @@
   gMinPlatformPkgTokenSpaceGuid.PcdPciDmaAbove4G
   gMinPlatformPkgTokenSpaceGuid.PcdPciNoExtendedConfigSpace
   gMinPlatformPkgTokenSpaceGuid.PcdPciResourceAssigned
-
+  gMinPlatformPkgTokenSpaceGuid.PcdPciSegmentCount
-- 
2.16.2.windows.1