[S] Change in coreboot[main]: soc/intel/tigerlake: Add IRQ mapping for PEG PCI-E ports

[Alicja Michalska (Code Review)]

Alicja Michalska has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/80848?usp=email )

Change subject: soc/intel/tigerlake: Add IRQ mapping for PEG PCI-E ports
......................................................................

soc/intel/tigerlake: Add IRQ mapping for PEG PCI-E ports

ACPI _PRT method was missing from PEG (SoC PCI-E) links, resulting in OS
complaining about interrupt routing.

'pcieport 0000:00:06.0: can't derive routing for PCI INT A'
'nvme 0000:04:00.0: PCI INT A: not connected'
'Interrupt: pin A routed to IRQ -2147483648'

TEST=Boot Linux and Windows 10 on TGL-H platform with PEG0/PEG1
populated with PCI-E devices - Radeon RX 7800XT and Kingston KC3000 NVME
SSD. Check logs and stability while running 3D application and disk
benchmark at the same time.

Change-Id: If102522efa1a67b362b14d859d9e27a37bad85a4
Signed-off-by: Alicja Michalska 
---
M src/soc/intel/tigerlake/acpi/pcie.asl
1 file changed, 48 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/48/80848/1

diff --git a/src/soc/intel/tigerlake/acpi/pcie.asl b/src/soc/intel/tigerlake/acpi/pcie.asl
index a25335c..86d53fe 100644
--- a/src/soc/intel/tigerlake/acpi/pcie.asl
+++ b/src/soc/intel/tigerlake/acpi/pcie.asl
@@ -115,22 +115,70 @@
 Device (PEG0)
 {
    Name (_ADR, 0x00060000)
+
+	OperationRegion (RPCS, PCI_Config, 0x4c, 4)
+	Field (RPCS, AnyAcc, NoLock, Preserve)
+	{
+		, 24,
+		RPPN, 8,	/* Root Port Number */
+	}
+
+	Method (_PRT)
+	{
+		Return (IRQM (RPPN))
+	}
 }

#if CONFIG(SOC_INTEL_TIGERLAKE_PCH_H)
 Device (PEG1)
 {
    Name (_ADR, 0x00010000)
+
+	OperationRegion (RPCS, PCI_Config, 0x4c, 4)
+	Field (RPCS, AnyAcc, NoLock, Preserve)
+	{
+		, 24,
+		RPPN, 8,	/* Root Port Number */
+	}
+
+	Method (_PRT)
+	{
+		Return (IRQM (RPPN))
+	}
 }

Device (PEG2)
 {
    Name (_ADR, 0x00010001)
+
+	OperationRegion (RPCS, PCI_Config, 0x4c, 4)
+	Field (RPCS, AnyAcc, NoLock, Preserve)
+	{
+		, 24,
+		RPPN, 8,	/* Root Port Number */
+	}
+
+	Method (_PRT)
+	{
+		Return (IRQM (RPPN))
+	}
 }

Device (PEG3)
 {
    Name (_ADR, 0x00010002)
+
+	OperationRegion (RPCS, PCI_Config, 0x4c, 4)
+	Field (RPCS, AnyAcc, NoLock, Preserve)
+	{
+		, 24,
+		RPPN, 8,	/* Root Port Number */
+	}
+
+	Method (_PRT)
+	{
+		Return (IRQM (RPPN))
+	}
 }
 #endif