drm/i915: Replace 4096 with PAGE_SIZE or I915_GTT_PAGE_SIZE
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 10 Jan 2017 14:47:34 +0000 (14:47 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 10 Jan 2017 20:54:32 +0000 (20:54 +0000)
commitf51455d442c0fa97e4600960f19bf23b66f0b386
treebbe0a09197a72cec73e5e8ce867067f693a8f6dd
parent2a20d6f8582d6783bd2e2ef9c7536f1b8a6c2fbe
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>
15 files changed:
drivers/gpu/drm/i915/i915_gem.c
drivers/gpu/drm/i915/i915_gem_context.c
drivers/gpu/drm/i915/i915_gem_evict.c
drivers/gpu/drm/i915/i915_gem_execbuffer.c
drivers/gpu/drm/i915/i915_gem_fence_reg.c
drivers/gpu/drm/i915/i915_gem_fence_reg.h
drivers/gpu/drm/i915/i915_gem_gtt.c
drivers/gpu/drm/i915/i915_gem_gtt.h
drivers/gpu/drm/i915/i915_gem_render_state.c
drivers/gpu/drm/i915/i915_gem_stolen.c
drivers/gpu/drm/i915/i915_gem_tiling.c
drivers/gpu/drm/i915/i915_vma.c
drivers/gpu/drm/i915/intel_lrc.c
drivers/gpu/drm/i915/intel_lrc.h
drivers/gpu/drm/i915/intel_ringbuffer.c