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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-06-16 17:05:23 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-06-16 18:54:05 +0300 |
| commit | 1a71cf2fa646799d4397a49b223549d8617fece0 (patch) | |
| tree | be457298385f3d0e077577a2836bcc35cae51c9f /drivers/gpu/drm | |
| parent | 8a2421bd0d9abb3a599969d88e1910a2a101eccc (diff) | |
| download | linux-1a71cf2fa646799d4397a49b223549d8617fece0.tar.xz | |
drm/i915: Allow execbuffer to use the first object as the batch
Currently, the last object in the execlist is the always the batch.
However, when building the batch buffer we often know the batch object
first and if we can use the first slot in the execlist we can emit
relocation instructions relative to it immediately and avoid a separate
pass to adjust the relocations to point to the last execlist slot.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_execbuffer.c | 5 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index e33a2ed9244c..3c2af70034cf 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -367,6 +367,7 @@ static int i915_getparam(struct drm_device *dev, void *data, case I915_PARAM_HAS_EXEC_ASYNC: case I915_PARAM_HAS_EXEC_FENCE: case I915_PARAM_HAS_EXEC_CAPTURE: + case I915_PARAM_HAS_EXEC_BATCH_FIRST: /* For the time being all of these are always true; * if some supported hardware does not have one of these * features this value needs to be provided from diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index f4b02ef3987f..e262133a7cf5 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -645,7 +645,10 @@ ht_needs_resize(const struct i915_gem_context_vma_lut *lut) static unsigned int eb_batch_index(const struct i915_execbuffer *eb) { - return eb->buffer_count - 1; + if (eb->args->flags & I915_EXEC_BATCH_FIRST) + return 0; + else + return eb->buffer_count - 1; } static int eb_select_context(struct i915_execbuffer *eb) |