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drm/syncobj: Drop add/remove_callback from driver interface

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This is used for handling future fences. Currently no driver use
these, and I think given the new timeline fence proposed by KHR it
would be better to have a more abstract interface for future fences.
Could be something simple like a struct dma_future_fence plus a
function to add a callback or wait for the fence to materialize.

Then syncobj (and anything else really) could grow new functions to
expose these two drivers. Normal dma_fence would then keep the nice
guarantee that they will always signal (and through ordering, be
deadlock free). dma_future_fence would then be the tricky one.

This also fixes sphinx complaining about the kerneldoc.

Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180822092905.19884-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2018-08-22 11:29:05 +02:00
parent ad1a56f1bf
commit e296de926d
2 changed files with 0 additions and 20 deletions
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15
drivers/gpu/drm/drm_syncobj.c
View file

@ -120,14 +120,6 @@ static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj,
return ret;
}
/**
* drm_syncobj_add_callback - adds a callback to syncobj::cb_list
* @syncobj: Sync object to which to add the callback
* @cb: Callback to add
* @func: Func to use when initializing the drm_syncobj_cb struct
*
* This adds a callback to be called next time the fence is replaced
*/
void drm_syncobj_add_callback(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb,
drm_syncobj_func_t func)
@ -136,13 +128,7 @@ void drm_syncobj_add_callback(struct drm_syncobj *syncobj,
drm_syncobj_add_callback_locked(syncobj, cb, func);
spin_unlock(&syncobj->lock);
}
EXPORT_SYMBOL(drm_syncobj_add_callback);
/**
* drm_syncobj_add_callback - removes a callback to syncobj::cb_list
* @syncobj: Sync object from which to remove the callback
* @cb: Callback to remove
*/
void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb)
{
@ -150,7 +136,6 @@ void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
list_del_init(&cb->node);
spin_unlock(&syncobj->lock);
}
EXPORT_SYMBOL(drm_syncobj_remove_callback);
/**
* drm_syncobj_replace_fence - replace fence in a sync object.

5
include/drm/drm_syncobj.h
View file

@ -131,11 +131,6 @@ drm_syncobj_fence_get(struct drm_syncobj *syncobj)
struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
u32 handle);
void drm_syncobj_add_callback(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb,
drm_syncobj_func_t func);
void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
struct drm_syncobj_cb *cb);
void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
struct dma_fence *fence);
int drm_syncobj_find_fence(struct drm_file *file_private,