[Qemu-arm] [PATCH v2 1/2] ACPI: Add IORT Structure definition

[Eric Auger <eric.auger@redhat.com>]

From: Prem Mallappa <prem.mallappa@broadcom.com>

ACPI Spec 6.0 introduces IO Remapping Table Structure. This patch
introduces the definitions required to describe the IO relationship
between the PCIe root complex and the ITS.

This conforms to:
"IO Remapping Table System Software on ARM Platforms",
Document number: ARM DEN 0049B, October 2015.

Signed-off-by: Prem Mallappa <prem.mallappa@broadcom.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v1 -> v2:
- took into account Drew's comments:
  cleanup comments, remove most defines, add ACPI_IORT_NODE_HEADER_DEF
---
 include/hw/acpi/acpi-defs.h | 68 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index 9c1b7cb..1cd1e69 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -609,4 +609,72 @@ typedef struct AcpiDmarHardwareUnit AcpiDmarHardwareUnit;
 /* Masks for Flags field above */
 #define ACPI_DMAR_INCLUDE_PCI_ALL   1
 
+/*
+ * Input Output Remapping Table (IORT)
+ * Conforms to "IO Remapping Table System Software on ARM Platforms",
+ * Document number: ARM DEN 0049B, October 2015
+ */
+
+struct AcpiIortTable {
+    ACPI_TABLE_HEADER_DEF     /* ACPI common table header */
+    uint32_t node_count;
+    uint32_t node_offset;
+    uint32_t reserved;
+} QEMU_PACKED;
+typedef struct AcpiIortTable AcpiIortTable;
+
+/*
+ * IORT node types
+ */
+
+#define ACPI_IORT_NODE_HEADER_DEF   /* Node format common fields */ \
+    uint8_t  type;          \
+    uint16_t length;        \
+    uint8_t  revision;      \
+    uint32_t reserved;      \
+    uint32_t mapping_count; \
+    uint32_t mapping_offset;\
+
+/* Values for node Type above */
+enum {
+        ACPI_IORT_NODE_ITS_GROUP = 0x00,
+        ACPI_IORT_NODE_NAMED_COMPONENT = 0x01,
+        ACPI_IORT_NODE_PCI_ROOT_COMPLEX = 0x02,
+        ACPI_IORT_NODE_SMMU = 0x03,
+        ACPI_IORT_NODE_SMMU_V3 = 0x04
+};
+
+struct AcpiIortIdMapping {
+    uint32_t input_base;
+    uint32_t id_count;
+    uint32_t output_base;
+    uint32_t output_reference;
+    uint32_t flags;
+} QEMU_PACKED;
+typedef struct AcpiIortIdMapping AcpiIortIdMapping;
+
+struct AcpiIortMemoryAccess {
+    uint32_t cache_coherency;
+    uint8_t  hints;
+    uint16_t reserved;
+    uint8_t  memory_flags;
+} QEMU_PACKED;
+typedef struct AcpiIortMemoryAccess AcpiIortMemoryAccess;
+
+struct AcpiIortItsGroup {
+    ACPI_IORT_NODE_HEADER_DEF
+    uint32_t its_count;
+    uint32_t identifiers[0];
+} QEMU_PACKED;
+typedef struct AcpiIortItsGroup AcpiIortItsGroup;
+
+struct AcpiIortRC {
+    ACPI_IORT_NODE_HEADER_DEF
+    AcpiIortMemoryAccess memory_properties;
+    uint32_t ats_attribute;
+    uint32_t pci_segment_number;
+    AcpiIortIdMapping id_mapping_array[0];
+} QEMU_PACKED;
+typedef struct AcpiIortRC AcpiIortRC;
+
 #endif
-- 
2.5.5