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drm/i915: buddy allocator

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Simple buddy allocator. We want to allocate properly aligned
power-of-two blocks to promote usage of huge-pages for the GTT, so 64K,
2M and possibly even 1G. While we do support allocating stuff at a
specific offset, it is more intended for preallocating portions of the
address space, say for an initial framebuffer, for other uses drm_mm is
probably a much better fit. Anyway, hopefully this can all be thrown
away if we eventually move to having the core MM manage device memory.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190809202926.14545-2-matthew.auld@intel.com
This commit is contained in:
Matthew Auld
2019-08-09 21:29:24 +01:00
committed by Chris Wilson
parent 05f219d709
commit 14d1b9a624
7 changed files with 1282 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_globals.h
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@@ -27,6 +27,7 @@ void i915_globals_exit(void);
/* constructors */
int i915_global_active_init(void);
int i915_global_buddy_init(void);
int i915_global_context_init(void);
int i915_global_gem_context_init(void);
int i915_global_objects_init(void);