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drm/syncobj: use dma_fence_get_stub 

Extract of useful code from the timeline work. Let's use just a single
stub fence instance instead of allocating a new one all the time.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Link: https://patchwork.freedesktop.org/patch/265248/
hifive-unleashed-5.1
Christian König 2018-11-13 14:14:00 +01:00
parent 078dec3326
commit 86bbd89d5d
1 changed files with 14 additions and 44 deletions
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58
drivers/gpu/drm/drm_syncobj.c
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@ -56,22 +56,6 @@
#include "drm_internal.h"
#include <drm/drm_syncobj.h>
struct drm_syncobj_stub_fence {
struct dma_fence base;
spinlock_t lock;
};
static const char *drm_syncobj_stub_fence_get_name(struct dma_fence *fence)
{
return "syncobjstub";
}
static const struct dma_fence_ops drm_syncobj_stub_fence_ops = {
.get_driver_name = drm_syncobj_stub_fence_get_name,
.get_timeline_name = drm_syncobj_stub_fence_get_name,
};
/**
* drm_syncobj_find - lookup and reference a sync object.
* @file_private: drm file private pointer
@ -190,23 +174,18 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
}
EXPORT_SYMBOL(drm_syncobj_replace_fence);
static int drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
/**
* drm_syncobj_assign_null_handle - assign a stub fence to the sync object
* @syncobj: sync object to assign the fence on
*
* Assign a already signaled stub fence to the sync object.
*/
static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
{
struct drm_syncobj_stub_fence *fence;
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
if (fence == NULL)
return -ENOMEM;
struct dma_fence *fence = dma_fence_get_stub();
spin_lock_init(&fence->lock);
dma_fence_init(&fence->base, &drm_syncobj_stub_fence_ops,
&fence->lock, 0, 0);
dma_fence_signal(&fence->base);
drm_syncobj_replace_fence(syncobj, 0, &fence->base);
dma_fence_put(&fence->base);
return 0;
drm_syncobj_replace_fence(syncobj, 0, fence);
dma_fence_put(fence);
}
/**
@ -274,7 +253,6 @@ EXPORT_SYMBOL(drm_syncobj_free);
int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
struct dma_fence *fence)
{
int ret;
struct drm_syncobj *syncobj;
syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL);
@ -285,13 +263,8 @@ int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
INIT_LIST_HEAD(&syncobj->cb_list);
spin_lock_init(&syncobj->lock);
if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) {
ret = drm_syncobj_assign_null_handle(syncobj);
if (ret < 0) {
drm_syncobj_put(syncobj);
return ret;
}
}
if (flags & DRM_SYNCOBJ_CREATE_SIGNALED)
drm_syncobj_assign_null_handle(syncobj);
if (fence)
drm_syncobj_replace_fence(syncobj, 0, fence);
@ -982,11 +955,8 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
if (ret < 0)
return ret;
for (i = 0; i < args->count_handles; i++) {
ret = drm_syncobj_assign_null_handle(syncobjs[i]);
if (ret < 0)
break;
}
for (i = 0; i < args->count_handles; i++)
drm_syncobj_assign_null_handle(syncobjs[i]);
drm_syncobj_array_free(syncobjs, args->count_handles);