| Message ID | 20200101220736.1073007-1-chris@chris-wilson.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] drm/i915/gem: Single page objects are naturally contiguous | expand |
On Wed, 1 Jan 2020 at 22:08, Chris Wilson <chris@chris-wilson.co.uk> wrote: > > Small objects that only occupy a single page are naturally contiguous, > so mark them as such and allow them the special abilities that come with > it. > > A more thorough treatment would extend i915_gem_object_pin_map() to > support discontiguous lmem objects, following the example of > ioremap_prot() and use get_vm_area() + remap_io_sg(). > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > Cc: Matthew Auld <matthew.auld@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com>
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c index d50adac12249..1515384d7e0e 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c @@ -107,7 +107,10 @@ void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj, { INIT_LIST_HEAD(&obj->mm.blocks); obj->mm.region = intel_memory_region_get(mem); + obj->flags |= flags; + if (obj->base.size <= mem->min_page_size) + obj->flags |= I915_BO_ALLOC_CONTIGUOUS; mutex_lock(&mem->objects.lock);
Small objects that only occupy a single page are naturally contiguous, so mark them as such and allow them the special abilities that come with it. A more thorough treatment would extend i915_gem_object_pin_map() to support discontiguous lmem objects, following the example of ioremap_prot() and use get_vm_area() + remap_io_sg(). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.auld@intel.com> --- drivers/gpu/drm/i915/gem/i915_gem_region.c | 3 +++ 1 file changed, 3 insertions(+)