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From: "Jeff Brasen" <jbrasen@nvidia.com>
To: <devel@edk2.groups.io>
Cc: <Pierre.Gondois@arm.com>, <Sami.Mujawar@arm.com>,
	<Alexei.Fedorov@arm.com>, Jeff Brasen <jbrasen@nvidia.com>
Subject: [PATCH v2 2/4] DynamicTablesPkg: AcpiSsdtPcieLibArm: Allow use of segment number as UID
Date: Fri, 1 Jul 2022 10:32:35 -0600	[thread overview]
Message-ID: <63668e8cc9cad1351b8db7a4f19febe83587ac0a.1656693003.git.jbrasen@nvidia.com> (raw)
In-Reply-To: <cover.1656693003.git.jbrasen@nvidia.com>

Add support for selecting to use index or segment number as UID and name.
This allows the path of the nodes to be well known.

Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
---
 DynamicTablesPkg/DynamicTablesPkg.dec         |  3 +++
 .../AcpiSsdtPcieLibArm/SsdtPcieGenerator.c    | 19 ++++++++++++++++++-
 .../Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf |  3 +++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/DynamicTablesPkg/DynamicTablesPkg.dec b/DynamicTablesPkg/DynamicTablesPkg.dec
index 9b74c5a671..a890a048be 100644
--- a/DynamicTablesPkg/DynamicTablesPkg.dec
+++ b/DynamicTablesPkg/DynamicTablesPkg.dec
@@ -57,5 +57,8 @@
   # Non BSA Compliant 16550 Serial HID
   gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdNonBsaCompliant16550SerialHid|""|VOID*|0x40000008
 
+  # Use PCI segment numbers as UID
+  gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdPciUseSegmentAsUid|FALSE|BOOLEAN|0x40000009
+
 [Guids]
   gEdkiiDynamicTablesPkgTokenSpaceGuid = { 0xab226e66, 0x31d8, 0x4613, { 0x87, 0x9d, 0xd2, 0xfa, 0xb6, 0x10, 0x26, 0x3c } }
diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
index d4c5f47b07..80776ceb79 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
@@ -1002,6 +1002,7 @@ BuildSsdtPciTableEx (
   UINTN                         Index;
   EFI_ACPI_DESCRIPTION_HEADER   **TableList;
   ACPI_PCI_GENERATOR            *Generator;
+  UINT32                        Uid;
 
   ASSERT (This != NULL);
   ASSERT (AcpiTableInfo != NULL);
@@ -1057,13 +1058,29 @@ BuildSsdtPciTableEx (
   *Table = TableList;
 
   for (Index = 0; Index < PciCount; Index++) {
+    if (PcdGetBool (PcdPciUseSegmentAsUid)) {
+      Uid = PciInfo[Index].PciSegmentGroupNumber;
+      if (Uid > MAX_PCI_ROOT_COMPLEXES_SUPPORTED) {
+        DEBUG ((
+          DEBUG_ERROR,
+          "ERROR: SSDT-PCI: Pci root complexes segment number: %d."
+          " Greater than maximum number of Pci root complexes supported = %d.\n",
+          Uid,
+          MAX_PCI_ROOT_COMPLEXES_SUPPORTED
+          ));
+        return EFI_INVALID_PARAMETER;
+      }
+    } else {
+      Uid = Index;
+    }
+
     // Build a SSDT table describing the Pci devices.
     Status = BuildSsdtPciTable (
                Generator,
                CfgMgrProtocol,
                AcpiTableInfo,
                &PciInfo[Index],
-               Index,
+               Uid,
                &TableList[Index]
                );
     if (EFI_ERROR (Status)) {
diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf
index 283b564801..431e32a777 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf
@@ -30,3 +30,6 @@
   AcpiHelperLib
   AmlLib
   BaseLib
+
+[Pcd]
+  gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdPciUseSegmentAsUid
-- 
2.25.1


  parent reply	other threads:[~2022-07-01 16:32 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-01 16:32 [PATCH v2 0/4] DynamicTablesPkg: Pcie generation updates Jeff Brasen
2022-07-01 16:32 ` [PATCH v2 1/4] DynamicTablesPkg: AcpiSsdtPcieLibArm: Correct translation value Jeff Brasen
2022-07-01 16:32 ` Jeff Brasen [this message]
2022-07-01 16:32 ` [PATCH v2 3/4] DynamicTablesPkg: AcpiSsdtPcieLibArm: Support UID > 0xF Jeff Brasen
2022-07-01 16:32 ` [PATCH v2 4/4] DynamicTablesPkg: AcpiSsdtPcieLibArm: Add support for override protocol Jeff Brasen
2022-07-07 16:59 ` [PATCH v2 0/4] DynamicTablesPkg: Pcie generation updates Jeff Brasen
2022-07-08  7:31   ` PierreGondois
2022-07-08 15:13     ` Jeff Brasen

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