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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-18 17:17:07 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-18 22:36:56 +0100 |
| commit | d8923dcfa53d59886d432a3fc430e26cb92ce86a (patch) | |
| tree | 0ce2d1d7a872e41fce5a11659052c4d79d554ad9 /drivers | |
| parent | drm/i915: Fallback to using unmappable memory for scanout (diff) | |
| download | linux-dev-d8923dcfa53d59886d432a3fc430e26cb92ce86a.tar.xz linux-dev-d8923dcfa53d59886d432a3fc430e26cb92ce86a.zip | |
drm/i915: Track display alignment on VMA
When using the aliasing ppgtt and pageflipping with the shrinker/eviction
active, we note that we often have to rebind the backbuffer before
flipping onto the scanout because it has an invalid alignment. If we
store the worst-case alignment required for a VMA, we can avoid having
to rebind at critical junctures.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-28-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 21 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.h | 1 |
2 files changed, 9 insertions, 13 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 69a994bd6afd..021f807d7afc 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3050,7 +3050,6 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) struct drm_i915_private *dev_priv = to_i915(vma->vm->dev); struct drm_i915_gem_object *obj = vma->obj; u64 start, end; - u64 min_alignment; int ret; GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); @@ -3061,17 +3060,10 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) size = i915_gem_get_ggtt_size(dev_priv, size, i915_gem_object_get_tiling(obj)); - min_alignment = - i915_gem_get_ggtt_alignment(dev_priv, size, - i915_gem_object_get_tiling(obj), - flags & PIN_MAPPABLE); - if (alignment == 0) - alignment = min_alignment; - if (alignment & (min_alignment - 1)) { - DRM_DEBUG("Invalid object alignment requested %llu, minimum %llu\n", - alignment, min_alignment); - return -EINVAL; - } + alignment = max(max(alignment, vma->display_alignment), + i915_gem_get_ggtt_alignment(dev_priv, size, + i915_gem_object_get_tiling(obj), + flags & PIN_MAPPABLE)); start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; @@ -3595,6 +3587,8 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, if (IS_ERR(vma)) goto err_unpin_display; + vma->display_alignment = max_t(u64, vma->display_alignment, alignment); + WARN_ON(obj->pin_display > i915_vma_pin_count(vma)); i915_gem_object_flush_cpu_write_domain(obj); @@ -3625,7 +3619,8 @@ i915_gem_object_unpin_from_display_plane(struct i915_vma *vma) if (WARN_ON(vma->obj->pin_display == 0)) return; - vma->obj->pin_display--; + if (--vma->obj->pin_display == 0) + vma->display_alignment = 0; i915_vma_unpin(vma); WARN_ON(vma->obj->pin_display > i915_vma_pin_count(vma)); diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index 9248a0e0b286..a15cea73f729 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -184,6 +184,7 @@ struct i915_vma { struct sg_table *pages; void __iomem *iomap; u64 size; + u64 display_alignment; unsigned int flags; /** |