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drm/i915: Tidy i915_gem_valid_gtt_space()

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We can replace a couple of tests with an assertion that the passed in
node is already allocated (as matches the existing call convention) and
by a small bit of refactoring we can bring the line lengths to under
80cols.

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/20161205142941.21965-3-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-12-05 14:29:38 +00:00
parent 172ae5b4c8
commit 7d1d9aea3e
1 changed files with 14 additions and 12 deletions
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26
drivers/gpu/drm/i915/i915_vma.c
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@ -297,10 +297,14 @@ void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
vma->flags &= ~I915_VMA_CAN_FENCE;
}
bool i915_gem_valid_gtt_space(struct i915_vma *vma,
unsigned long cache_level)
static bool color_differs(struct drm_mm_node *node, unsigned long color)
{
struct drm_mm_node *gtt_space = &vma->node;
return node->allocated && node->color != color;
}
bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level)
{
struct drm_mm_node *node = &vma->node;
struct drm_mm_node *other;
/*
@ -313,18 +317,16 @@ bool i915_gem_valid_gtt_space(struct i915_vma *vma,
if (vma->vm->mm.color_adjust == NULL)
return true;
if (!drm_mm_node_allocated(gtt_space))
return true;
/* Only valid to be called on an already inserted vma */
GEM_BUG_ON(!drm_mm_node_allocated(node));
GEM_BUG_ON(list_empty(&node->node_list));
if (list_empty(&gtt_space->node_list))
return true;
other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
if (other->allocated && !other->hole_follows && other->color != cache_level)
other = list_prev_entry(node, node_list);
if (color_differs(other, cache_level) && !other->hole_follows)
return false;
other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
other = list_next_entry(node, node_list);
if (color_differs(other, cache_level) && !node->hole_follows)
return false;
return true;