diff options
| author | Matthew Auld <matthew.auld@intel.com> | 2019-10-08 17:01:15 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-08 20:50:01 +0100 |
| commit | 2f0b97ca02118630132dddf258fbdb5d5f5ec32a (patch) | |
| tree | 655a905f97962439bc6069ae84c45164428bb8ae /drivers/gpu/drm/i915/intel_memory_region.c | |
| parent | 232a6ebae419193f5b8da4fa869ae5089ab105c2 (diff) | |
drm/i915/region: support contiguous allocations
Some kernel internal objects may need to be allocated as a contiguous
block, also thinking ahead the various kernel io_mapping interfaces seem
to expect it, although this is purely a limitation in the kernel
API...so perhaps something to be improved.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Michael J Ruhl <michael.j.ruhl@intel.com>
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/20191008160116.18379-3-matthew.auld@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_memory_region.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_memory_region.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c index 2ef67c397fca..98006618e871 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.c +++ b/drivers/gpu/drm/i915/intel_memory_region.c @@ -47,8 +47,8 @@ __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, unsigned int flags, struct list_head *blocks) { - unsigned long n_pages = size >> ilog2(mem->mm.chunk_size); unsigned int min_order = 0; + unsigned long n_pages; GEM_BUG_ON(!IS_ALIGNED(size, mem->mm.chunk_size)); GEM_BUG_ON(!list_empty(blocks)); @@ -58,6 +58,13 @@ __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, ilog2(mem->mm.chunk_size); } + if (flags & I915_ALLOC_CONTIGUOUS) { + size = roundup_pow_of_two(size); + min_order = ilog2(size) - ilog2(mem->mm.chunk_size); + } + + n_pages = size >> ilog2(mem->mm.chunk_size); + mutex_lock(&mem->mm_lock); do { |