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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-10 17:47:34 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-01-10 23:54:32 +0300 |
| commit | f51455d442c0fa97e4600960f19bf23b66f0b386 (patch) | |
| tree | bbe0a09197a72cec73e5e8ce867067f693a8f6dd /drivers/gpu/drm/i915/i915_gem_stolen.c | |
| parent | 2a20d6f8582d6783bd2e2ef9c7536f1b8a6c2fbe (diff) | |
| download | linux-f51455d442c0fa97e4600960f19bf23b66f0b386.tar.xz | |
drm/i915: Replace 4096 with PAGE_SIZE or I915_GTT_PAGE_SIZE
Start converting over from the byte count to its semantic macro, either
we want to allocate the size of a physical page in main memory or we
want the size of a virtual page in the GTT. 4096 could mean either, but
PAGE_SIZE and I915_GTT_PAGE_SIZE are explicit and should help improve
code comprehension and future changes. In the future, we may want to use
variable GTT page sizes and so have the challenge of knowing which
hardcoded values were used to represent a physical page vs the virtual
page.
v2: Look for a few more 4096s to convert, discover IS_ALIGNED().
v3: 4096ul paranoia, make fence alignment a distinct value of 4096, keep
bdw stolen w/a as 4096 until we know better.
v4: Add asserts that i915_vma_insert() start/end are aligned to GTT page
sizes.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170110144734.26052-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_stolen.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_stolen.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index f1a1d33febcd..e5be8e04bf3b 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -647,8 +647,9 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv stolen_offset, gtt_offset, size); /* KISS and expect everything to be page-aligned */ - if (WARN_ON(size == 0) || WARN_ON(size & 4095) || - WARN_ON(stolen_offset & 4095)) + if (WARN_ON(size == 0) || + WARN_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)) || + WARN_ON(!IS_ALIGNED(stolen_offset, I915_GTT_MIN_ALIGNMENT))) return NULL; stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |