[edk2-platforms][PATCH V2 1/2] Platform/Sgi: Add smmu-v3 node in the iort acpi table

["Vivek Kumar Gautam" <vivek.gautam@arm.com>]

Arm's SMMU-v3 present in various SGI/RD platforms provides address
translation support for devices such as the ones present over PCIe
bus. SMMU-v3 also supports Address Translation Service (ATS) and
Page Request Interface (PRI) to work with PCIe devices.

The overall system topology looks as below:
	 ---------------       ------------       ------------
	|  PCIe device  |---->|  SMMUv3    |---->|   ITS      |
	| (RequesterID) |     | (StreamID) |     | (DeviceID) |
	 ---------------       ------------       ------------

SMMU-v3 accepts requests coming from the PCIe device, and forwards
the traffic to the GIC ITS block that can provide the translation for
interrupts coming from LPI sources.

Add this generic SMMUv3 type node in the iort table and setup the
rid->stream-id->device-id mapping accordingly.

Signed-off-by: Vivek Gautam <vivek.gautam@arm.com>
---
 Platform/ARM/SgiPkg/AcpiTables/Iort.aslc | 58 ++++++++++++++++++--
 1 file changed, 54 insertions(+), 4 deletions(-)

diff --git a/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc b/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc
index 58ec31ddc837..ce8eefc585ea 100644
--- a/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc
+++ b/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc
@@ -20,6 +20,12 @@ typedef struct
   UINT32                                   ItsIdentifiers;
 } ARM_EFI_ACPI_6_0_IO_REMAPPING_ITS_NODE;
 
+typedef struct
+{
+  EFI_ACPI_6_0_IO_REMAPPING_SMMU3_NODE     SmmuNode;
+  EFI_ACPI_6_0_IO_REMAPPING_ID_TABLE       SmmuIdMap[2];
+} ARM_EFI_ACPI_6_0_IO_REMAPPING_SMMU3_NODE;
+
 typedef struct
 {
   EFI_ACPI_6_0_IO_REMAPPING_RC_NODE        RcNode;
@@ -30,6 +36,7 @@ typedef struct
 {
   EFI_ACPI_6_0_IO_REMAPPING_TABLE          Header;
   ARM_EFI_ACPI_6_0_IO_REMAPPING_ITS_NODE   ItsNode;
+  ARM_EFI_ACPI_6_0_IO_REMAPPING_SMMU3_NODE SmmuNode;
   ARM_EFI_ACPI_6_0_IO_REMAPPING_RC_NODE    RcNode;
 } ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE;
 
@@ -45,7 +52,7 @@ ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE Iort =
        ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE,
        EFI_ACPI_IO_REMAPPING_TABLE_REVISION
      ),
-     2,  // NumNodes
+     3,  // NumNodes
      sizeof (EFI_ACPI_6_0_IO_REMAPPING_TABLE),  // NodeOffset
      0,  // Reserved
   },
@@ -62,9 +69,52 @@ ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE Iort =
         0,  // NumIdMappings
         0,  // IdReference
       },
-      1,    // GIC ITS Identifiers
+      1,    // ITS count
+    },
+    0,      // GIC ITS Identifiers
+  },
+  // SMMU
+  {
+    // EFI_ACPI_6_0_IO_REMAPPING_SMMU3_NODE
+    {
+      // EFI_ACPI_6_0_IO_REMAPPING_NODE
+      {
+        EFI_ACPI_IORT_TYPE_SMMUv3, // Type
+        sizeof (ARM_EFI_ACPI_6_0_IO_REMAPPING_SMMU3_NODE), // Length
+        2, // Revision
+        0, // Reserved
+        2, // NumIdMapping
+        OFFSET_OF (ARM_EFI_ACPI_6_0_IO_REMAPPING_SMMU3_NODE, SmmuIdMap), // IdReference
+      },
+      0x4F000000, // Base address
+      EFI_ACPI_IORT_SMMUv3_FLAG_COHAC_OVERRIDE, // Flags
+      0,   // Reserved
+      0,   // VATOS address
+      EFI_ACPI_IORT_SMMUv3_MODEL_GENERIC, // SMMUv3 Model
+      260, // Event
+      0,   // Pri
+      262, // Gerror
+      261, // Sync
+      0,   // Proximity domain
+      1,   // DevIDMappingIndex
+    },
+    // EFI_ACPI_6_0_IO_REMAPPING_ID_TABLE
+    {
+      {
+        0x0000, // InputBase
+        0xffff, // NumIds
+        0x0000, // OutputBase
+        OFFSET_OF (ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE, ItsNode), // OutputReference
+        0, // Flags
+      },
+      {
+        0x0,     // InputBase
+        0x1,     // NumIds
+        0x10000, // OutputBase
+        OFFSET_OF (ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE, ItsNode), // OutputReference
+        EFI_ACPI_IORT_ID_MAPPING_FLAGS_SINGLE, // Flags
+      },
     },
-    0,
   },
   // ARM_EFI_ACPI_6_0_IO_REMAPPING_RC_NODE
   {
@@ -91,7 +141,7 @@ ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE Iort =
       0x0000,  // InputBase
       0xffff,  // NumIds
       0x0000,  // OutputBase
-      OFFSET_OF (ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE, ItsNode),  // OutputReference
+      OFFSET_OF (ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE, SmmuNode),  // OutputReference
       0,       // Flags
     }
   }
-- 
2.17.1