AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-22 19:43:07 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/i915/userptr: Don't mark readonly objects as dirty

Browse Source 
If we map an object as readonly into the GTT, we know that the GPU
cannot have written to it and so the object is not dirty and we don't
need to flush the writes back to the system.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190709081718.27843-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-07-09 09:17:18 +01:00
parent f7ddc80ecb
commit 681c774d34
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/i915/gem/i915_gem_userptr.c
View File

@ -663,6 +663,14 @@ i915_gem_userptr_put_pages(struct drm_i915_gem_object *obj,
__i915_gem_object_release_shmem(obj, pages, true);
i915_gem_gtt_finish_pages(obj, pages);
/*
* We always mark objects as dirty when they are used by the GPU,
* just in case. However, if we set the vma as being read-only we know
* that the object will never have been written to.
*/
if (i915_gem_object_is_readonly(obj))
obj->mm.dirty = false;
for_each_sgt_page(page, sgt_iter, pages) {
if (obj->mm.dirty)
/*