From: Gerd Hoffmann Date: Wed, 27 Nov 2019 09:25:22 +0000 (+0100) Subject: drm: call drm_gem_object_funcs.mmap with fake offset X-Git-Tag: v5.10.7~2352^2~6^2~734 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e5516553999f7352bce3d921441b1288eb0a1bb7;p=platform%2Fkernel%2Flinux-rpi.git drm: call drm_gem_object_funcs.mmap with fake offset The fake offset is going to stay, so change the calling convention for drm_gem_object_funcs.mmap to include the fake offset. Update all users accordingly. Note that this reverts 83b8a6f242ea ("drm/gem: Fix mmap fake offset handling for drm_gem_object_funcs.mmap") and on top then adds the fake offset to drm_gem_prime_mmap to make sure all paths leading to obj->funcs->mmap are consistent. v3: move fake-offset tweak in drm_gem_prime_mmap() so we have this code only once in the function (Rob Herring). Fixes: 83b8a6f242ea ("drm/gem: Fix mmap fake offset handling for drm_gem_object_funcs.mmap") Cc: Daniel Vetter Cc: Rob Herring Signed-off-by: Gerd Hoffmann Reviewed-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20191127092523.5620-2-kraxel@redhat.com --- diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 2f2b889..56f42e0 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1106,9 +1106,6 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size, return -EINVAL; if (obj->funcs && obj->funcs->mmap) { - /* Remove the fake offset */ - vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node); - ret = obj->funcs->mmap(obj, vma); if (ret) return ret; diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 0810d3e..a421a2e 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -528,6 +528,9 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) struct drm_gem_shmem_object *shmem; int ret; + /* Remove the fake offset */ + vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node); + shmem = to_drm_gem_shmem_obj(obj); ret = drm_gem_shmem_get_pages(shmem); diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 0814211..a0f929c 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -713,6 +713,9 @@ int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) struct file *fil; int ret; + /* Add the fake offset */ + vma->vm_pgoff += drm_vma_node_start(&obj->vma_node); + if (obj->funcs && obj->funcs->mmap) { ret = obj->funcs->mmap(obj, vma); if (ret) @@ -737,8 +740,6 @@ int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) if (ret) goto out; - vma->vm_pgoff += drm_vma_node_start(&obj->vma_node); - ret = obj->dev->driver->fops->mmap(fil, vma); drm_vma_node_revoke(&obj->vma_node, priv); diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index e6495ca..3e8c3de 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -514,13 +514,6 @@ EXPORT_SYMBOL(ttm_bo_mmap); int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo) { ttm_bo_get(bo); - - /* - * FIXME: &drm_gem_object_funcs.mmap is called with the fake offset - * removed. Add it back here until the rest of TTM works without it. - */ - vma->vm_pgoff += drm_vma_node_start(&bo->base.vma_node); - ttm_bo_mmap_vma_setup(bo, vma); return 0; } diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 97a4816..0b37506 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -159,9 +159,7 @@ struct drm_gem_object_funcs { * * The callback is used by by both drm_gem_mmap_obj() and * drm_gem_prime_mmap(). When @mmap is present @vm_ops is not - * used, the @mmap callback must set vma->vm_ops instead. The @mmap - * callback is always called with a 0 offset. The caller will remove - * the fake offset as necessary. + * used, the @mmap callback must set vma->vm_ops instead. */ int (*mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);