On 8/8/22 17:39, Sami Mujawar wrote:
Hi Kun,
I have just tried testing your patch with Kvmtool guest firmware and think this
patch may need some modifications.
Also, the patch 4/6 may need some adjustment, which I will reply back on that
patch separately.
Regards,
Sami Mujawar
On 08/08/2022 02:22 pm, Sami Mujawar wrote:
Hi Kun,
Thank you for this patch.
These changes look good to me.
Reviewed-by: Sami Mujawar <sami.muja...@arm.com>
Regards,
Sami Mujawar
On 31/07/2022 06:37 am, Kun Qin via groups.io wrote:
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3998
Certain OSes will complain if the ECAM config space is not reserved in
the ACPI namespace.
This change adds a function to reserve PNP motherboard resources for a
given PCI node.
Co-authored-by: Joe Lopez <joelo...@microsoft.com>
Signed-off-by: Kun Qin <kuqi...@gmail.com>
Reviewed-by: Pierre Gondois <pierre.gond...@arm.com>
---
Notes:
v2:
- Only create RES0 after config space checking [Pierre]
v3:
- Updated function names and descriptions [Pierre]
- Moved translation calculation to CONFIG case [Pierre]
DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c | 171
++++++++++++++++++++
1 file changed, 171 insertions(+)
diff --git
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
index ceffe2838c03..658a089c8f1f 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
@@ -616,6 +616,169 @@ GeneratePciCrs (
return Status;
}
+/** Generate a RES0 device node to reserve PNP motherboard resources
+ for a given PCI node.
+
+ @param [in] PciNode Parent PCI node handle of the generated
+ resource object.
+ @param [out] CrsNode CRS node of the AML tree to populate.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid input parameter.
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GenerateMotherboardDevice (
+ IN AML_OBJECT_NODE_HANDLE PciNode,
+ OUT AML_OBJECT_NODE_HANDLE *CrsNode
+ )
+{
+ EFI_STATUS Status;
+ UINT32 EisaId;
+ AML_OBJECT_NODE_HANDLE ResNode;
+
+ if (CrsNode == NULL) {
+ ASSERT (0);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // ASL: Device (RES0) {}
+ Status = AmlCodeGenDevice ("RES0", PciNode, &ResNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ // ASL: Name (_HID, EISAID ("PNP0C02"))
+ Status = AmlGetEisaIdFromString ("PNP0C02", &EisaId); /* PNP Motherboard
Resources */
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ Status = AmlCodeGenNameInteger ("_HID", EisaId, ResNode, NULL);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ // ASL: Name (_CRS, ResourceTemplate () {})
+ Status = AmlCodeGenNameResourceTemplate ("_CRS", ResNode, CrsNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ return Status;
+}
+
+/** Reserves ECAM space for PCI config space
+
+ @param [in] Generator The SSDT Pci generator.
+ @param [in] CfgMgrProtocol Pointer to the Configuration Manager
+ Protocol interface.
+ @param [in] PciInfo Pci device information.
+ @param [in, out] PciNode RootNode of the AML tree to populate.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+ReserveEcamSpace (
+ IN ACPI_PCI_GENERATOR *Generator,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ IN CONST CM_ARM_PCI_CONFIG_SPACE_INFO *PciInfo,
+ IN OUT AML_OBJECT_NODE_HANDLE PciNode
+ )
+{
+ EFI_STATUS Status;
+ AML_OBJECT_NODE_HANDLE CrsNode;
+ BOOLEAN Translation;
+ UINT32 Index;
+ CM_ARM_OBJ_REF *RefInfo;
+ UINT32 RefCount;
+ CM_ARM_PCI_ADDRESS_MAP_INFO *AddrMapInfo;
+ BOOLEAN IsPosDecode;
+
+ // Get the array of CM_ARM_OBJ_REF referencing the
+ // CM_ARM_PCI_ADDRESS_MAP_INFO objects.
+ Status = GetEArmObjCmRef (
+ CfgMgrProtocol,
+ PciInfo->AddressMapToken,
+ &RefInfo,
+ &RefCount
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ for (Index = 0; Index < RefCount; Index++) {
+ // Get CM_ARM_PCI_ADDRESS_MAP_INFO structures one by one.
+ Status = GetEArmObjPciAddressMapInfo (
+ CfgMgrProtocol,
+ RefInfo[Index].ReferenceToken,
+ &AddrMapInfo,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
[SAMI] Sorry for missing this earlier in the review. However, the ECAM memory
space is described byCM_ARM_PCI_CONFIG_SPACE_INFO. So, I think that needs to be
used here.
The CM_ARM_PCI_CONFIG_SPACE_INFO structure does not include the length of the
configuration space and would probably need to be updated.
Which platform are you testing these changes on? I would like to understand
more about your use case. Is it possible to share some more details, please?
[/SAMI]
[Pierre]
Yes indeed, CM_ARM_PCI_CONFIG_SPACE_INFO should contain the configuration
address space, it should not be described in CM_ARM_PCI_ADDRESS_MAP_INFO.
So there should be no need to search through the CM_ARM_PCI_ADDRESS_MAP_INFO
objects. Sorry for missing this earlier.
The length of the address space could be computed as:
length = (end_bus - start_bus + 1) × 32 devices × 8 functions × 4 KB
[/Pierre]
+
+ switch (AddrMapInfo->SpaceCode) {
+ case PCI_SS_CONFIG:
+ Translation = (AddrMapInfo->CpuAddress != AddrMapInfo->PciAddress);
+ if (AddrMapInfo->CpuAddress >= AddrMapInfo->PciAddress) {
+ IsPosDecode = TRUE;
+ } else {
+ IsPosDecode = FALSE;
+ }
+
+ Status = GenerateMotherboardDevice (PciNode, &CrsNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ break;
+ }
+
+ Status = AmlCodeGenRdQWordMemory (
+ FALSE,
+ IsPosDecode,
+ TRUE,
+ TRUE,
+ FALSE, // non-cacheable
+ TRUE,
+ 0,
+ AddrMapInfo->PciAddress,
+ AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
+ Translation ? AddrMapInfo->CpuAddress -
AddrMapInfo->PciAddress : 0,
+ AddrMapInfo->AddressSize,
+ 0,
+ NULL,
+ 0,
+ TRUE,
+ CrsNode,
+ NULL
+ );
+ break;
+ default:
+ break;
+ } // switch
+
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+ }
+
+ return Status;
+}
+
/** Generate a Pci device.
@param [in] Generator The SSDT Pci generator.
@@ -702,9 +865,17 @@ GeneratePciDevice (
return Status;
}
+ // Add the PNP Motherboard Resources Device to reserve ECAM space
+ Status = ReserveEcamSpace (Generator, CfgMgrProtocol, PciInfo, PciNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
// Add the template _OSC method.
Status = AddOscMethod (PciInfo, PciNode);
ASSERT_EFI_ERROR (Status);
+
return Status;
}
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