drm/amdkfd: Add SVM API support capability bits

SVMAPISupported property added to HSA_CAPABILITY, the value match
HSA_CAPABILITY defined in Thunk spec:

SVMAPISupported: it will not be supported on older kernels that don't
have HMM or on systems with GFXv8 or older GPUs without support for
48-bit virtual addresses.

CoherentHostAccess property added to HSA_MEMORYPROPERTY, the value match
HSA_MEMORYPROPERTY defined in Thunk spec:

CoherentHostAccess: whether or not device memory can be coherently
accessed by the host CPU.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_topology.c

@@ -1419,6 +1419,12 @@ int kfd_topology_add_device(struct kfd_dev *gpu)
 		dev->node_props.capability |= (adev->ras_features != 0) ?
 			HSA_CAP_RASEVENTNOTIFY : 0;
 
+	/* SVM API and HMM page migration work together, device memory type
+	 * is initialized to not 0 when page migration register device memory.
+	 */
+	if (adev->kfd.dev->pgmap.type != 0)
+		dev->node_props.capability |= HSA_CAP_SVMAPI_SUPPORTED;
+
 	kfd_debug_print_topology();
 
 	if (!res)

drivers/gpu/drm/amd/amdkfd/kfd_topology.h

@@ -53,8 +53,9 @@
 #define HSA_CAP_ASIC_REVISION_MASK		0x03c00000
 #define HSA_CAP_ASIC_REVISION_SHIFT		22
 #define HSA_CAP_SRAM_EDCSUPPORTED		0x04000000
+#define HSA_CAP_SVMAPI_SUPPORTED		0x08000000
 
-#define HSA_CAP_RESERVED			0xf80f8000
+#define HSA_CAP_RESERVED			0xf00f8000
 
 struct kfd_node_properties {
 	uint64_t hive_id;
@@ -100,7 +101,8 @@ struct kfd_node_properties {
 
 #define HSA_MEM_FLAGS_HOT_PLUGGABLE		0x00000001
 #define HSA_MEM_FLAGS_NON_VOLATILE		0x00000002
-#define HSA_MEM_FLAGS_RESERVED		0xfffffffc
+#define HSA_MEM_FLAGS_COHERENTHOSTACCESS	0x00000004
+#define HSA_MEM_FLAGS_RESERVED			0xfffffff8
 
 struct kfd_mem_properties {
 	struct list_head	list;