[PATCH v3 20/23] drm/msm: Remove msm_gem_free_work

Rob Clark
2020-10-19T20:46:22Z

Now that we don't need struct_mutex in the free path, we can get rid of
the asynchronous free altogether.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/msm/msm_drv.c | 3 ---
drivers/gpu/drm/msm/msm_drv.h | 5 -----
drivers/gpu/drm/msm/msm_gem.c | 27 ---------------------------
drivers/gpu/drm/msm/msm_gem.h | 1 -
4 files changed, 36 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 15c41786d018..ebcd8e827363 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -465,9 +465,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)

priv->wq = alloc_ordered_workqueue("msm", 0);

- INIT_WORK(&priv->free_work, msm_gem_free_work);
- init_llist_head(&priv->free_list);
-
INIT_LIST_HEAD(&priv->inactive_list);
mutex_init(&priv->mm_lock);

diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 7e6fb4af4964..5308e636a90c 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -188,10 +188,6 @@ struct msm_drm_private {
struct list_head inactive_list;
struct mutex mm_lock;

- /* worker for delayed free of objects: */
- struct work_struct free_work;
- struct llist_head free_list;
-
struct workqueue_struct *wq;

unsigned int num_planes;
@@ -291,7 +287,6 @@ struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach, struct sg_table *sg);
int msm_gem_prime_pin(struct drm_gem_object *obj);
void msm_gem_prime_unpin(struct drm_gem_object *obj);
-void msm_gem_free_work(struct work_struct *work);

int msm_framebuffer_prepare(struct drm_framebuffer *fb,
struct msm_gem_address_space *aspace);
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index af1abddca78e..827c7397ed12 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -939,16 +939,6 @@ void msm_gem_free_object(struct drm_gem_object *obj)
struct drm_device *dev = obj->dev;
struct msm_drm_private *priv = dev->dev_private;

- if (llist_add(&msm_obj->freed, &priv->free_list))
- queue_work(priv->wq, &priv->free_work);
-}
-
-static void free_object(struct msm_gem_object *msm_obj)
-{
- struct drm_gem_object *obj = &msm_obj->base;
- struct drm_device *dev = obj->dev;
- struct msm_drm_private *priv = dev->dev_private;
-
/* object should not be on active list: */
WARN_ON(is_active(msm_obj));

@@ -981,23 +971,6 @@ static void free_object(struct msm_gem_object *msm_obj)
kfree(msm_obj);
}

-void msm_gem_free_work(struct work_struct *work)
-{
- struct msm_drm_private *priv =
- container_of(work, struct msm_drm_private, free_work);
- struct llist_node *freed;
- struct msm_gem_object *msm_obj, *next;
-
- while ((freed = llist_del_all(&priv->free_list))) {
- llist_for_each_entry_safe(msm_obj, next,
- freed, freed)
- free_object(msm_obj);
-
- if (need_resched())
- break;
- }
-}
-
/* convenience method to construct a GEM buffer object, and userspace handle */
int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
uint32_t size, uint32_t flags, uint32_t *handle,
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index f4e73c6f07bf..ffa2130ee97d 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -204,7 +204,6 @@ static inline bool is_vunmapable(struct msm_gem_object *msm_obj)

void msm_gem_purge(struct drm_gem_object *obj);
void msm_gem_vunmap(struct drm_gem_object *obj);
-void msm_gem_free_work(struct work_struct *work);

/* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
* associated with the cmdstream submission for synchronization (and
--
2.26.2