diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-03 12:39:20 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-03 13:08:47 +0300 |
| commit | ceae14bd4cc4333b9a3b0b6b9457bb16e7ca410a (patch) | |
| tree | 54b5f7321cb9cfb1ea68334119784b4ca826e9e5 /drivers/gpu | |
| parent | 29ef3fa987edb9768e19a6325030e1d2d58e29de (diff) | |
| download | linux-ceae14bd4cc4333b9a3b0b6b9457bb16e7ca410a.tar.xz | |
drm/i915: Lift timeline ordering to await_dma_fence
Currently we filter out repeated use of the same timeline in the low
level i915_gem_request_await_request(), after having added the
dependency on the old request. However, we can lift this to
i915_gem_request_await_dma_fence() (before the dependency is added)
using the observation that requests along the same timeline are
explicitly ordered via i915_add_request (along with the dependencies).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170503093924.5320-3-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_request.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index b68935d056c5..022f5588d906 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -687,6 +687,7 @@ i915_gem_request_await_request(struct drm_i915_gem_request *to, int ret; GEM_BUG_ON(to == from); + GEM_BUG_ON(to->timeline == from->timeline); if (i915_gem_request_completed(from)) return 0; @@ -699,9 +700,6 @@ i915_gem_request_await_request(struct drm_i915_gem_request *to, return ret; } - if (to->timeline == from->timeline) - return 0; - if (to->engine == from->engine) { ret = i915_sw_fence_await_sw_fence_gfp(&to->submit, &from->submit, @@ -767,6 +765,14 @@ i915_gem_request_await_dma_fence(struct drm_i915_gem_request *req, if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) continue; + /* + * Requests on the same timeline are explicitly ordered, along + * with their dependencies, by i915_add_request() which ensures + * that requests are submitted in-order through each ring. + */ + if (fence->context == req->fence.context) + continue; + if (dma_fence_is_i915(fence)) ret = i915_gem_request_await_request(req, to_request(fence)); |