diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_request.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_request.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_request.h b/drivers/gpu/drm/i915/i915_gem_request.h index a56559e3b034..4976039189ea 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.h +++ b/drivers/gpu/drm/i915/i915_gem_request.h @@ -87,8 +87,23 @@ struct drm_i915_gem_request { struct intel_timeline *timeline; struct intel_signal_node signaling; + /* Fences for the various phases in the request's lifetime. + * + * The submit fence is used to await upon all of the request's + * dependencies. When it is signaled, the request is ready to run. + * It is used by the driver to then queue the request for execution. + * + * The execute fence is used to signal when the request has been + * sent to hardware. + * + * It is illegal for the submit fence of one request to wait upon the + * execute fence of an earlier request. It should be sufficient to + * wait upon the submit fence of the earlier request. + */ struct i915_sw_fence submit; + struct i915_sw_fence execute; wait_queue_t submitq; + wait_queue_t execq; u32 global_seqno; |