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authorGerd Hoffmann <kraxel@redhat.com>2019-10-16 14:51:53 +0300
committerGerd Hoffmann <kraxel@redhat.com>2019-10-17 14:59:16 +0300
commitc40069cb7bd64903e0c0a3845ea8d3298ca57ea3 (patch)
tree9af03f449422a42f3419b846f7a7ff912312618b /include/drm/drm_gem.h
parent3c2ed9ceddf7c036c7cc6bab06fb7a555f8b137b (diff)
downloadlinux-c40069cb7bd64903e0c0a3845ea8d3298ca57ea3.tar.xz
drm: add mmap() to drm_gem_object_funcs
drm_gem_object_funcs->vm_ops alone can't handle everything which needs to be done for mmap(), tweaking vm_flags for example. So add a new mmap() callback to drm_gem_object_funcs where this code can go to. Note that the vm_ops field is not used in case the mmap callback is present, it is expected that the callback sets vma->vm_ops instead. Also setting vm_flags and vm_page_prot is the job of the new callback. so drivers have more control over these flags. drm_gem_mmap_obj() will use the new callback for object specific mmap setup. With this in place the need for driver-speific fops->mmap callbacks goes away, drm_gem_mmap can be hooked instead. drm_gem_prime_mmap() will use the new callback too to just mmap gem objects directly instead of jumping though loops to make drm_gem_object_lookup() and fops->mmap work. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20191016115203.20095-2-kraxel@redhat.com
Diffstat (limited to 'include/drm/drm_gem.h')
-rw-r--r--include/drm/drm_gem.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 6aaba14f5972..e71f75a2ab57 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -151,6 +151,20 @@ struct drm_gem_object_funcs {
void (*vunmap)(struct drm_gem_object *obj, void *vaddr);
/**
+ * @mmap:
+ *
+ * Handle mmap() of the gem object, setup vma accordingly.
+ *
+ * This callback is optional.
+ *
+ * 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.
+ *
+ */
+ int (*mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);
+
+ /**
* @vm_ops:
*
* Virtual memory operations used with mmap.