[edk2-devel] [PATCH] DynamicTablesPkg: AcpiSsdtPcieLibArm: Allow use of segment number as UID

[Jeff Brasen via groups.io]

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.

For example, if the PCIe node needs to be notified from by an interrupt

for a Generic Event Device



Signed-off-by: Jeff Brasen <jbrasen at 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 cc34c2bdd6..adc2e67cbf 100644

--- a/DynamicTablesPkg/DynamicTablesPkg.dec

+++ b/DynamicTablesPkg/DynamicTablesPkg.dec

@@ -60,5 +60,8 @@

   # 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 d82f071e85..85098752c6 100644

--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c

+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c

@@ -981,6 +981,7 @@ BuildSsdtPciTableEx (

   UINTN                         Index;

   EFI_ACPI_DESCRIPTION_HEADER   **TableList;

   ACPI_PCI_GENERATOR            *Generator;

+  UINT32                        Uid;

 

   ASSERT (This != NULL);

   ASSERT (AcpiTableInfo != NULL);

@@ -1036,13 +1037,29 @@ 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 b38a4e9d34..c2a1acb570 100644

--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf

+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieLibArm.inf

@@ -30,3 +30,6 @@

   AmlLib

   BaseLib

   SsdtPcieSupportLib

+

+[Pcd]

+  gEdkiiDynamicTablesPkgTokenSpaceGuid.PcdPciUseSegmentAsUid

-- 

2.25.1





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