Read PCIe slot type from sysfs

Read the PCIe slot type from sysfs instead of libdrm.

Change-Id: I9392b9e18a209ac7332f6902bcafb3b6062c86c1

src/amd_smi/amd_smi.cc

@@ -1830,22 +1830,14 @@ amdsmi_get_pcie_link_status(amdsmi_processor_handle processor_handle, amdsmi_pci
 
     // default to PCIe
     info->pcie_slot_type = AMDSMI_SLOT_TYPE__PCIE;
-    amd::smi::AMDSmiGPUDevice* gpu_device = nullptr;
-    status = get_gpu_device_from_handle(
-            processor_handle, &gpu_device);
-    if (status == AMDSMI_STATUS_SUCCESS
-            && gpu_device->check_if_drm_is_supported()) {
-        struct drm_amdgpu_info_device dev_info = {};
-        status = gpu_device->amdgpu_query_info(AMDGPU_INFO_DEV_INFO,
-                sizeof(struct drm_amdgpu_memory_info), &dev_info);
-        // bits [16:17] in ids_flags field as slot type
-        if (status == AMDSMI_STATUS_SUCCESS) {
-            // two bits starts with index 16
-            info->pcie_slot_type = static_cast<amdsmi_pcie_slot_type_t>((dev_info.ids_flags >> 16) & 0x03);
-        }
+    rsmi_pcie_slot_type_t slot_type;
+    status = rsmi_wrapper(rsmi_dev_pcie_slot_type_get,
+            processor_handle, &slot_type);
+    if (status == AMDSMI_STATUS_SUCCESS) {
+        info->pcie_slot_type = static_cast<amdsmi_pcie_slot_type_t>(slot_type);
     }
 
-    return status;
+    return AMDSMI_STATUS_SUCCESS;
 }
 
 amdsmi_status_t amdsmi_get_pcie_link_caps(amdsmi_processor_handle processor_handle, amdsmi_pcie_info_t *info) {
@@ -1921,18 +1913,14 @@ amdsmi_status_t amdsmi_get_pcie_link_caps(amdsmi_processor_handle processor_hand
 
     // default to PCIe
     info->pcie_slot_type = AMDSMI_SLOT_TYPE__PCIE;
-    if (gpu_device->check_if_drm_is_supported()) {
-        struct drm_amdgpu_info_device dev_info = {};
-        status = gpu_device->amdgpu_query_info(AMDGPU_INFO_DEV_INFO,
-                sizeof(struct drm_amdgpu_memory_info), &dev_info);
-        // bits [16:17] in ids_flags field as slot type
-        if (status == AMDSMI_STATUS_SUCCESS) {
-            // two bits starts with index 16
-            info->pcie_slot_type = static_cast<amdsmi_pcie_slot_type_t>((dev_info.ids_flags >> 16) & 0x03);
-        }
+    rsmi_pcie_slot_type_t slot_type;
+    status = rsmi_wrapper(rsmi_dev_pcie_slot_type_get,
+            processor_handle, &slot_type);
+    if (status == AMDSMI_STATUS_SUCCESS) {
+        info->pcie_slot_type = static_cast<amdsmi_pcie_slot_type_t>(slot_type);
     }
 
-    return status;
+    return AMDSMI_STATUS_SUCCESS;
 }
 
 amdsmi_status_t amdsmi_get_processor_handle_from_bdf(amdsmi_bdf_t bdf,