drm/amdkfd: Adjust weight to represent num_hops info when report xgmi iolink

Upper level runtime need the xgmi hops info to determine the data path
Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -372,7 +372,7 @@ static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink,
 			if (props->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS)
 				props->weight = 20;
 			else if (props->iolink_type == CRAT_IOLINK_TYPE_XGMI)
-				props->weight = 15;
+				props->weight = 15 * iolink->num_hops_xgmi;
 			else
 				props->weight = node_distance(id_from, id_to);
 
@@ -1092,6 +1092,7 @@ static int kfd_fill_gpu_direct_io_link_to_cpu(int *avail_size,
 
 static int kfd_fill_gpu_xgmi_link_to_gpu(int *avail_size,
 			struct kfd_dev *kdev,
+			struct kfd_dev *peer_kdev,
 			struct crat_subtype_iolink *sub_type_hdr,
 			uint32_t proximity_domain_from,
 			uint32_t proximity_domain_to)
@@ -1110,6 +1111,8 @@ static int kfd_fill_gpu_xgmi_link_to_gpu(int *avail_size,
 	sub_type_hdr->io_interface_type = CRAT_IOLINK_TYPE_XGMI;
 	sub_type_hdr->proximity_domain_from = proximity_domain_from;
 	sub_type_hdr->proximity_domain_to = proximity_domain_to;
+	sub_type_hdr->num_hops_xgmi =
+		amdgpu_amdkfd_get_xgmi_hops_count(kdev->kgd, peer_kdev->kgd);
 	return 0;
 }
 
@@ -1287,7 +1290,7 @@ static int kfd_create_vcrat_image_gpu(void *pcrat_image,
 				(char *)sub_type_hdr +
 				sizeof(struct crat_subtype_iolink));
 			ret = kfd_fill_gpu_xgmi_link_to_gpu(
-				&avail_size, kdev,
+				&avail_size, kdev, peer_dev->gpu,
 				(struct crat_subtype_iolink *)sub_type_hdr,
 				proximity_domain, nid);
 			if (ret < 0)

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

@@ -274,7 +274,8 @@ struct crat_subtype_iolink {
 	uint32_t	minimum_bandwidth_mbs;
 	uint32_t	maximum_bandwidth_mbs;
 	uint32_t	recommended_transfer_size;
-	uint8_t		reserved2[CRAT_IOLINK_RESERVED_LENGTH];
+	uint8_t		reserved2[CRAT_IOLINK_RESERVED_LENGTH - 1];
+	uint8_t		num_hops_xgmi;
 };
 
 /*