[PATCH v2 2/4] DynamicTablesPkg: AcpiSsdtPcieLibArm: Allow use of segment number as UID


Jeff Brasen
 

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@...>
---
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