From 84408d5f3892534da9e8e5d5b21126c91f8cac1a Mon Sep 17 00:00:00 2001 From: xinhui pan Date: Wed, 16 Jun 2021 12:32:34 +0800 Subject: [PATCH] drm/amdgpu: Set TTM_PAGE_FLAG_SG earlier for userprt BOs MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Because TTM do page counting on userptr BOs which is actually not needed. To avoid that, lets set TTM_PAGE_FLAG_SG after tt_create and before tt_populate. Signed-off-by: xinhui pan Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 80dff29f2bc7..43421bd9d801 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1129,8 +1129,6 @@ static int amdgpu_ttm_tt_populate(struct ttm_device *bdev, ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL); if (!ttm->sg) return -ENOMEM; - - ttm->page_flags |= TTM_PAGE_FLAG_SG; return 0; } @@ -1156,7 +1154,6 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_device *bdev, amdgpu_ttm_tt_set_user_pages(ttm, NULL); kfree(ttm->sg); ttm->sg = NULL; - ttm->page_flags &= ~TTM_PAGE_FLAG_SG; return; } @@ -1190,6 +1187,9 @@ int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo, return -ENOMEM; } + /* Set TTM_PAGE_FLAG_SG before populate but after create. */ + bo->ttm->page_flags |= TTM_PAGE_FLAG_SG; + gtt = (void *)bo->ttm; gtt->userptr = addr; gtt->userflags = flags; -- 2.25.1