From 26d3ac3cb04d171a861952e89324e347598a347f Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Mon, 11 May 2020 11:35:52 +0200 Subject: [PATCH] drm/shmem-helpers: Redirect mmap for imported dma-buf MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently this seems to work by converting the sgt into a pages array, and then treating it like a native object. Do the right thing and redirect mmap to the exporter. With this nothing is calling get_pages anymore on imported dma-buf, and we can start to remove the use of the ->pages array for that case. v2: Rebase Tested-by: Boris Brezillon Acked-by: Thomas Zimmermann Cc: Gerd Hoffmann Cc: Rob Herring Cc: Noralf Trønnes Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20200511093554.211493-8-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_gem_shmem_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 0aac83ed9f5d..afe9668f1750 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -551,6 +551,9 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) /* Remove the fake offset */ vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node); + if (obj->import_attach) + return dma_buf_mmap(obj->dma_buf, vma, 0); + shmem = to_drm_gem_shmem_obj(obj); ret = drm_gem_shmem_get_pages(shmem);