From 17acb9f35ed736c177f85b8ee711f278e7aff421 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Mon, 5 Aug 2019 08:33:57 -0600 Subject: drm/shmem: Add madvise state and purge helpers Add support to the shmem GEM helpers for tracking madvise state and purging pages. This is based on the msm implementation. The BO provides a list_head, but the list management is handled outside of the shmem helpers as there are different locking requirements. Cc: Tomeu Vizoso Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Sean Paul Cc: David Airlie Cc: Daniel Vetter Cc: Eric Anholt Acked-by: Acked-by: Alyssa Rosenzweig Signed-off-by: Rob Herring Link: https://patchwork.freedesktop.org/patch/msgid/20190805143358.21245-1-robh@kernel.org --- include/drm/drm_gem_shmem_helper.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/drm/drm_gem_shmem_helper.h') diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 038b6d313447..ce1600fdfc3e 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -44,6 +44,9 @@ struct drm_gem_shmem_object { */ unsigned int pages_use_count; + int madv; + struct list_head madv_list; + /** * @pages_mark_dirty_on_put: * @@ -121,6 +124,18 @@ void drm_gem_shmem_unpin(struct drm_gem_object *obj); void *drm_gem_shmem_vmap(struct drm_gem_object *obj); void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr); +int drm_gem_shmem_madvise(struct drm_gem_object *obj, int madv); + +static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) +{ + return (shmem->madv > 0) && + !shmem->vmap_use_count && shmem->sgt && + !shmem->base.dma_buf && !shmem->base.import_attach; +} + +void drm_gem_shmem_purge_locked(struct drm_gem_object *obj); +void drm_gem_shmem_purge(struct drm_gem_object *obj); + struct drm_gem_shmem_object * drm_gem_shmem_create_with_handle(struct drm_file *file_priv, struct drm_device *dev, size_t size, -- cgit v1.2.3