drm/amdgpu: Refactor sriov xgmi topology filling to common code

amdgpu_xgmi_fill_topology_info and psp_xgmi_reflect_topology_info
perform the same logic of copying topology info of one node to every
other node in the hive. Instead of having two functions that purport to
do the same thing, this refactoring moves the logic of the fill function
to the reflect function and adds reflecting port number info as well for
complete functionality.

Signed-off-by: Will Aitken <wiaitken@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Will Aitken

drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c

@@ -1539,6 +1539,7 @@ static void psp_xgmi_reflect_topology_info(struct psp_context *psp,
 	uint64_t src_node_id = psp->adev->gmc.xgmi.node_id;
 	uint64_t dst_node_id = node_info.node_id;
 	uint8_t dst_num_hops = node_info.num_hops;
+	uint8_t dst_is_sharing_enabled = node_info.is_sharing_enabled;
 	uint8_t dst_num_links = node_info.num_links;
 
 	hive = amdgpu_get_xgmi_hive(psp->adev);
@@ -1558,13 +1559,20 @@ static void psp_xgmi_reflect_topology_info(struct psp_context *psp,
 				continue;
 
 			mirror_top_info->nodes[j].num_hops = dst_num_hops;
-			/*
-			 * prevent 0 num_links value re-reflection since reflection
+			mirror_top_info->nodes[j].is_sharing_enabled = dst_is_sharing_enabled;
+			/* prevent 0 num_links value re-reflection since reflection
 			 * criteria is based on num_hops (direct or indirect).
-			 *
 			 */
-			if (dst_num_links)
+			if (dst_num_links) {
 				mirror_top_info->nodes[j].num_links = dst_num_links;
+				/* swap src and dst due to frame of reference */
+				for (int k = 0; k < dst_num_links; k++) {
+					mirror_top_info->nodes[j].port_num[k].src_xgmi_port_num =
+						node_info.port_num[k].dst_xgmi_port_num;
+					mirror_top_info->nodes[j].port_num[k].dst_xgmi_port_num =
+						node_info.port_num[k].src_xgmi_port_num;
+				}
+			}
 
 			break;
 		}
@@ -1639,7 +1647,8 @@ int psp_xgmi_get_topology_info(struct psp_context *psp,
 			amdgpu_ip_version(psp->adev, MP0_HWIP, 0) ==
 				IP_VERSION(13, 0, 6) ||
 			amdgpu_ip_version(psp->adev, MP0_HWIP, 0) ==
-				IP_VERSION(13, 0, 14);
+				IP_VERSION(13, 0, 14) ||
+			amdgpu_sriov_vf(psp->adev);
 		bool ta_port_num_support = amdgpu_sriov_vf(psp->adev) ? 0 :
 				psp->xgmi_context.xgmi_ta_caps & EXTEND_PEER_LINK_INFO_CMD_FLAG;
 

drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c

@@ -968,28 +968,6 @@ static int amdgpu_xgmi_initialize_hive_get_data_partition(struct amdgpu_hive_inf
 	return 0;
 }
 
-static void amdgpu_xgmi_fill_topology_info(struct amdgpu_device *adev,
-	struct amdgpu_device *peer_adev)
-{
-	struct psp_xgmi_topology_info *top_info = &adev->psp.xgmi_context.top_info;
-	struct psp_xgmi_topology_info *peer_info = &peer_adev->psp.xgmi_context.top_info;
-
-	for (int i = 0; i < peer_info->num_nodes; i++) {
-		if (peer_info->nodes[i].node_id == adev->gmc.xgmi.node_id) {
-			for (int j = 0; j < top_info->num_nodes; j++) {
-				if (top_info->nodes[j].node_id == peer_adev->gmc.xgmi.node_id) {
-					peer_info->nodes[i].num_hops = top_info->nodes[j].num_hops;
-					peer_info->nodes[i].is_sharing_enabled =
-							top_info->nodes[j].is_sharing_enabled;
-					peer_info->nodes[i].num_links =
-							top_info->nodes[j].num_links;
-					return;
-				}
-			}
-		}
-	}
-}
-
 int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
 {
 	struct psp_xgmi_topology_info *top_info;
@@ -1075,11 +1053,6 @@ int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
 				/* To do: continue with some node failed or disable the whole hive*/
 				goto exit_unlock;
 			}
-
-			/* fill the topology info for peers instead of getting from PSP */
-			list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
-				amdgpu_xgmi_fill_topology_info(adev, tmp_adev);
-			}
 		} else {
 			/* get latest topology info for each device from psp */
 			list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {