drm/amdgpu: implement cgs interface to query system info

[deliverable/linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_cgs.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
index f901cdce7c5f425d36be995f5dc493cc2003eab5..19f46d0b6ca7a37bbd20e319bf3a8556a1225894 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
@@ -736,6 +736,28 @@ static int amdgpu_cgs_get_firmware_info(void *cgs_device,
        return 0;
 }
 
+static int amdgpu_cgs_query_system_info(void *cgs_device,
+                               struct cgs_system_info *sys_info)
+{
+       CGS_FUNC_ADEV;
+
+       if (NULL == sys_info)
+               return -ENODEV;
+
+       if (sizeof(struct cgs_system_info) != sys_info->size)
+               return -ENODEV;
+
+       switch (sys_info->info_id) {
+       case CGS_SYSTEM_INFO_ADAPTER_BDF_ID:
+               sys_info->value = adev->pdev->devfn | (adev->pdev->bus->number << 8);
+               break;
+       default:
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
 /** \brief evaluate acpi namespace object, handle or pathname must be valid
  *  \param cgs_device
  *  \param info input/output arguments for the control method
@@ -985,6 +1007,7 @@ static const struct cgs_ops amdgpu_cgs_ops = {
        amdgpu_cgs_set_powergating_state,
        amdgpu_cgs_set_clockgating_state,
        amdgpu_cgs_call_acpi_method,
+       amdgpu_cgs_query_system_info,
 };
 
 static const struct cgs_os_ops amdgpu_cgs_os_ops = {