diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index d53789642fc6..63503719303c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -1564,3 +1564,41 @@ int amdgpu_xgmi_reset_on_init(struct amdgpu_device *adev) return 0; } + +int amdgpu_xgmi_request_nps_change(struct amdgpu_device *adev, + struct amdgpu_hive_info *hive, + int req_nps_mode) +{ + struct amdgpu_device *tmp_adev; + int cur_nps_mode, r; + + /* This is expected to be called only during unload of driver. The + * request needs to be placed only once for all devices in the hive. If + * one of them fail, revert the request for previous successful devices. + * After placing the request, make hive mode as UNKNOWN so that other + * devices don't request anymore. + */ + mutex_lock(&hive->hive_lock); + list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { + r = adev->gmc.gmc_funcs->request_mem_partition_mode( + tmp_adev, req_nps_mode); + if (r) + goto err; + } + /* Set to UNKNOWN so that other devices don't request anymore */ + atomic_set(&hive->requested_nps_mode, UNKNOWN_MEMORY_PARTITION_MODE); + + mutex_unlock(&hive->hive_lock); + + return 0; +err: + /* Request back current mode if one of the requests failed */ + cur_nps_mode = adev->gmc.gmc_funcs->query_mem_partition_mode(tmp_adev); + list_for_each_entry_continue_reverse(tmp_adev, &hive->device_list, + gmc.xgmi.head) + adev->gmc.gmc_funcs->request_mem_partition_mode(tmp_adev, + cur_nps_mode); + mutex_lock(&hive->hive_lock); + + return r; +} |