2017-04-03 21:26:24 -06:00
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/*
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* Copyright 2017 Red Hat
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2017-08-25 11:52:22 -06:00
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* Parts ported from amdgpu (fence wait code).
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* Copyright 2016 Advanced Micro Devices, Inc.
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2017-04-03 21:26:24 -06:00
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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*
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*/
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/**
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* DOC: Overview
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*
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2017-12-14 13:30:52 -07:00
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* DRM synchronisation objects (syncobj, see struct &drm_syncobj) are
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* persistent objects that contain an optional fence. The fence can be updated
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* with a new fence, or be NULL.
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2017-04-03 21:26:24 -06:00
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*
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2017-08-25 11:52:22 -06:00
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* syncobj's can be waited upon, where it will wait for the underlying
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* fence.
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*
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2017-04-03 21:26:24 -06:00
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* syncobj's can be export to fd's and back, these fd's are opaque and
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* have no other use case, except passing the syncobj between processes.
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*
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* Their primary use-case is to implement Vulkan fences and semaphores.
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*
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* syncobj have a kref reference count, but also have an optional file.
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* The file is only created once the syncobj is exported.
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* The file takes a reference on the kref.
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*/
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#include <drm/drmP.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/anon_inodes.h>
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2017-04-25 21:09:02 -06:00
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#include <linux/sync_file.h>
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2017-08-25 11:52:24 -06:00
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#include <linux/sched/signal.h>
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2017-04-03 21:26:24 -06:00
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#include "drm_internal.h"
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#include <drm/drm_syncobj.h>
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/**
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* drm_syncobj_find - lookup and reference a sync object.
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* @file_private: drm file private pointer
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* @handle: sync object handle to lookup.
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*
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2017-12-14 13:30:52 -07:00
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* Returns a reference to the syncobj pointed to by handle or NULL. The
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* reference must be released by calling drm_syncobj_put().
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2017-04-03 21:26:24 -06:00
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*/
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struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
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u32 handle)
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{
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struct drm_syncobj *syncobj;
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spin_lock(&file_private->syncobj_table_lock);
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/* Check if we currently have a reference on the object */
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syncobj = idr_find(&file_private->syncobj_idr, handle);
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if (syncobj)
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drm_syncobj_get(syncobj);
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spin_unlock(&file_private->syncobj_table_lock);
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return syncobj;
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}
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EXPORT_SYMBOL(drm_syncobj_find);
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2017-08-28 08:39:25 -06:00
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static void drm_syncobj_add_callback_locked(struct drm_syncobj *syncobj,
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struct drm_syncobj_cb *cb,
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drm_syncobj_func_t func)
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{
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cb->func = func;
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list_add_tail(&cb->node, &syncobj->cb_list);
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}
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2017-08-25 11:52:24 -06:00
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static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj,
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struct dma_fence **fence,
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struct drm_syncobj_cb *cb,
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drm_syncobj_func_t func)
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{
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int ret;
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*fence = drm_syncobj_fence_get(syncobj);
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if (*fence)
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return 1;
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spin_lock(&syncobj->lock);
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/* We've already tried once to get a fence and failed. Now that we
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* have the lock, try one more time just to be sure we don't add a
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* callback when a fence has already been set.
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*/
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if (syncobj->fence) {
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2017-11-02 14:03:35 -06:00
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*fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
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lockdep_is_held(&syncobj->lock)));
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2017-08-25 11:52:24 -06:00
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ret = 1;
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} else {
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*fence = NULL;
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drm_syncobj_add_callback_locked(syncobj, cb, func);
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ret = 0;
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}
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spin_unlock(&syncobj->lock);
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return ret;
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}
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2017-08-28 08:39:25 -06:00
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/**
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* drm_syncobj_add_callback - adds a callback to syncobj::cb_list
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* @syncobj: Sync object to which to add the callback
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* @cb: Callback to add
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* @func: Func to use when initializing the drm_syncobj_cb struct
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*
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* This adds a callback to be called next time the fence is replaced
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*/
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void drm_syncobj_add_callback(struct drm_syncobj *syncobj,
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struct drm_syncobj_cb *cb,
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drm_syncobj_func_t func)
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{
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spin_lock(&syncobj->lock);
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drm_syncobj_add_callback_locked(syncobj, cb, func);
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spin_unlock(&syncobj->lock);
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}
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EXPORT_SYMBOL(drm_syncobj_add_callback);
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/**
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* drm_syncobj_add_callback - removes a callback to syncobj::cb_list
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* @syncobj: Sync object from which to remove the callback
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* @cb: Callback to remove
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*/
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void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
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struct drm_syncobj_cb *cb)
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{
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spin_lock(&syncobj->lock);
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list_del_init(&cb->node);
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spin_unlock(&syncobj->lock);
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}
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EXPORT_SYMBOL(drm_syncobj_remove_callback);
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2017-04-03 21:26:24 -06:00
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/**
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* drm_syncobj_replace_fence - replace fence in a sync object.
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* @syncobj: Sync object to replace fence in
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* @fence: fence to install in sync file.
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*
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* This replaces the fence on a sync object.
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*/
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2017-07-05 14:12:44 -06:00
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void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
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2017-04-03 21:26:24 -06:00
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struct dma_fence *fence)
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{
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2017-07-05 14:12:44 -06:00
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struct dma_fence *old_fence;
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2017-08-28 08:39:25 -06:00
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struct drm_syncobj_cb *cur, *tmp;
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2017-04-03 21:26:24 -06:00
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if (fence)
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dma_fence_get(fence);
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2017-08-28 08:39:25 -06:00
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spin_lock(&syncobj->lock);
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2017-11-02 14:03:35 -06:00
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old_fence = rcu_dereference_protected(syncobj->fence,
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lockdep_is_held(&syncobj->lock));
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rcu_assign_pointer(syncobj->fence, fence);
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2017-08-28 08:39:25 -06:00
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if (fence != old_fence) {
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list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
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list_del_init(&cur->node);
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cur->func(syncobj, cur);
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}
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}
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spin_unlock(&syncobj->lock);
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2017-04-03 21:26:24 -06:00
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dma_fence_put(old_fence);
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}
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EXPORT_SYMBOL(drm_syncobj_replace_fence);
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2017-08-25 11:52:25 -06:00
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struct drm_syncobj_null_fence {
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struct dma_fence base;
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spinlock_t lock;
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};
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static const char *drm_syncobj_null_fence_get_name(struct dma_fence *fence)
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{
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return "syncobjnull";
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}
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static bool drm_syncobj_null_fence_enable_signaling(struct dma_fence *fence)
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{
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dma_fence_enable_sw_signaling(fence);
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return !dma_fence_is_signaled(fence);
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}
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static const struct dma_fence_ops drm_syncobj_null_fence_ops = {
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.get_driver_name = drm_syncobj_null_fence_get_name,
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.get_timeline_name = drm_syncobj_null_fence_get_name,
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.enable_signaling = drm_syncobj_null_fence_enable_signaling,
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.wait = dma_fence_default_wait,
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.release = NULL,
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};
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static int drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
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{
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struct drm_syncobj_null_fence *fence;
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fence = kzalloc(sizeof(*fence), GFP_KERNEL);
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if (fence == NULL)
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return -ENOMEM;
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spin_lock_init(&fence->lock);
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dma_fence_init(&fence->base, &drm_syncobj_null_fence_ops,
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&fence->lock, 0, 0);
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dma_fence_signal(&fence->base);
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drm_syncobj_replace_fence(syncobj, &fence->base);
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dma_fence_put(&fence->base);
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return 0;
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}
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2017-12-14 13:30:52 -07:00
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/**
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* drm_syncobj_find_fence - lookup and reference the fence in a sync object
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* @file_private: drm file private pointer
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* @handle: sync object handle to lookup.
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* @fence: out parameter for the fence
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*
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* This is just a convenience function that combines drm_syncobj_find() and
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* drm_syncobj_fence_get().
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*
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* Returns 0 on success or a negative error value on failure. On success @fence
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* contains a reference to the fence, which must be released by calling
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* dma_fence_put().
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*/
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2017-08-25 11:52:19 -06:00
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int drm_syncobj_find_fence(struct drm_file *file_private,
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u32 handle,
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struct dma_fence **fence)
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2017-04-03 21:26:24 -06:00
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{
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struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
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int ret = 0;
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if (!syncobj)
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return -ENOENT;
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2017-08-25 11:52:20 -06:00
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*fence = drm_syncobj_fence_get(syncobj);
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2017-04-03 21:26:24 -06:00
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if (!*fence) {
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ret = -EINVAL;
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}
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drm_syncobj_put(syncobj);
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return ret;
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}
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2017-08-25 11:52:19 -06:00
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EXPORT_SYMBOL(drm_syncobj_find_fence);
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2017-04-03 21:26:24 -06:00
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/**
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* drm_syncobj_free - free a sync object.
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* @kref: kref to free.
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*
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* Only to be called from kref_put in drm_syncobj_put.
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*/
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void drm_syncobj_free(struct kref *kref)
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{
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struct drm_syncobj *syncobj = container_of(kref,
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struct drm_syncobj,
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refcount);
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2017-08-28 08:39:25 -06:00
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drm_syncobj_replace_fence(syncobj, NULL);
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2017-04-03 21:26:24 -06:00
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kfree(syncobj);
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}
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EXPORT_SYMBOL(drm_syncobj_free);
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2017-09-12 14:42:12 -06:00
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/**
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* drm_syncobj_create - create a new syncobj
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* @out_syncobj: returned syncobj
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* @flags: DRM_SYNCOBJ_* flags
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* @fence: if non-NULL, the syncobj will represent this fence
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2017-12-14 13:30:52 -07:00
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*
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* This is the first function to create a sync object. After creating, drivers
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* probably want to make it available to userspace, either through
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* drm_syncobj_get_handle() or drm_syncobj_get_fd().
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*
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* Returns 0 on success or a negative error value on failure.
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2017-09-12 14:42:12 -06:00
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*/
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int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
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struct dma_fence *fence)
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2017-04-03 21:26:24 -06:00
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{
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int ret;
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struct drm_syncobj *syncobj;
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syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL);
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if (!syncobj)
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return -ENOMEM;
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kref_init(&syncobj->refcount);
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2017-08-28 08:39:25 -06:00
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INIT_LIST_HEAD(&syncobj->cb_list);
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spin_lock_init(&syncobj->lock);
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2017-04-03 21:26:24 -06:00
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2017-08-25 11:52:25 -06:00
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if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) {
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ret = drm_syncobj_assign_null_handle(syncobj);
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if (ret < 0) {
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drm_syncobj_put(syncobj);
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return ret;
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}
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}
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2017-09-12 14:42:12 -06:00
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if (fence)
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drm_syncobj_replace_fence(syncobj, fence);
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*out_syncobj = syncobj;
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return 0;
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}
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EXPORT_SYMBOL(drm_syncobj_create);
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/**
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* drm_syncobj_get_handle - get a handle from a syncobj
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2017-12-14 13:30:52 -07:00
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* @file_private: drm file private pointer
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* @syncobj: Sync object to export
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* @handle: out parameter with the new handle
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*
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* Exports a sync object created with drm_syncobj_create() as a handle on
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* @file_private to userspace.
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*
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* Returns 0 on success or a negative error value on failure.
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2017-09-12 14:42:12 -06:00
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*/
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int drm_syncobj_get_handle(struct drm_file *file_private,
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struct drm_syncobj *syncobj, u32 *handle)
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{
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int ret;
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|
|
|
/* take a reference to put in the idr */
|
|
|
|
drm_syncobj_get(syncobj);
|
|
|
|
|
2017-04-03 21:26:24 -06:00
|
|
|
idr_preload(GFP_KERNEL);
|
|
|
|
spin_lock(&file_private->syncobj_table_lock);
|
|
|
|
ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
|
|
|
|
spin_unlock(&file_private->syncobj_table_lock);
|
|
|
|
|
|
|
|
idr_preload_end();
|
|
|
|
|
|
|
|
if (ret < 0) {
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
*handle = ret;
|
|
|
|
return 0;
|
|
|
|
}
|
2017-09-12 14:42:12 -06:00
|
|
|
EXPORT_SYMBOL(drm_syncobj_get_handle);
|
|
|
|
|
|
|
|
static int drm_syncobj_create_as_handle(struct drm_file *file_private,
|
|
|
|
u32 *handle, uint32_t flags)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct drm_syncobj *syncobj;
|
|
|
|
|
|
|
|
ret = drm_syncobj_create(&syncobj, flags, NULL);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = drm_syncobj_get_handle(file_private, syncobj, handle);
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return ret;
|
|
|
|
}
|
2017-04-03 21:26:24 -06:00
|
|
|
|
|
|
|
static int drm_syncobj_destroy(struct drm_file *file_private,
|
|
|
|
u32 handle)
|
|
|
|
{
|
|
|
|
struct drm_syncobj *syncobj;
|
|
|
|
|
|
|
|
spin_lock(&file_private->syncobj_table_lock);
|
|
|
|
syncobj = idr_remove(&file_private->syncobj_idr, handle);
|
|
|
|
spin_unlock(&file_private->syncobj_table_lock);
|
|
|
|
|
|
|
|
if (!syncobj)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int drm_syncobj_file_release(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct drm_syncobj *syncobj = file->private_data;
|
|
|
|
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct file_operations drm_syncobj_file_fops = {
|
|
|
|
.release = drm_syncobj_file_release,
|
|
|
|
};
|
|
|
|
|
2017-12-14 13:30:52 -07:00
|
|
|
/**
|
|
|
|
* drm_syncobj_get_fd - get a file descriptor from a syncobj
|
|
|
|
* @syncobj: Sync object to export
|
|
|
|
* @p_fd: out parameter with the new file descriptor
|
|
|
|
*
|
|
|
|
* Exports a sync object created with drm_syncobj_create() as a file descriptor.
|
|
|
|
*
|
|
|
|
* Returns 0 on success or a negative error value on failure.
|
|
|
|
*/
|
2017-09-12 14:42:13 -06:00
|
|
|
int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd)
|
2017-04-03 21:26:24 -06:00
|
|
|
{
|
2017-12-19 05:07:00 -07:00
|
|
|
struct file *file;
|
2017-04-03 21:26:24 -06:00
|
|
|
int fd;
|
|
|
|
|
|
|
|
fd = get_unused_fd_flags(O_CLOEXEC);
|
2017-09-12 14:42:13 -06:00
|
|
|
if (fd < 0)
|
2017-04-03 21:26:24 -06:00
|
|
|
return fd;
|
|
|
|
|
2017-12-19 05:07:00 -07:00
|
|
|
file = anon_inode_getfile("syncobj_file",
|
|
|
|
&drm_syncobj_file_fops,
|
|
|
|
syncobj, 0);
|
|
|
|
if (IS_ERR(file)) {
|
|
|
|
put_unused_fd(fd);
|
|
|
|
return PTR_ERR(file);
|
2017-04-03 21:26:24 -06:00
|
|
|
}
|
2017-12-19 05:07:00 -07:00
|
|
|
|
|
|
|
drm_syncobj_get(syncobj);
|
|
|
|
fd_install(fd, file);
|
|
|
|
|
2017-04-03 21:26:24 -06:00
|
|
|
*p_fd = fd;
|
|
|
|
return 0;
|
2017-09-12 14:42:13 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_syncobj_get_fd);
|
|
|
|
|
|
|
|
static int drm_syncobj_handle_to_fd(struct drm_file *file_private,
|
|
|
|
u32 handle, int *p_fd)
|
|
|
|
{
|
|
|
|
struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!syncobj)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = drm_syncobj_get_fd(syncobj, p_fd);
|
2017-04-03 21:26:24 -06:00
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int drm_syncobj_fd_to_handle(struct drm_file *file_private,
|
|
|
|
int fd, u32 *handle)
|
|
|
|
{
|
2017-12-19 05:07:00 -07:00
|
|
|
struct drm_syncobj *syncobj;
|
|
|
|
struct file *file;
|
2017-04-03 21:26:24 -06:00
|
|
|
int ret;
|
|
|
|
|
2017-12-19 05:07:00 -07:00
|
|
|
file = fget(fd);
|
|
|
|
if (!file)
|
2017-04-03 21:26:24 -06:00
|
|
|
return -EINVAL;
|
|
|
|
|
2017-12-19 05:07:00 -07:00
|
|
|
if (file->f_op != &drm_syncobj_file_fops) {
|
|
|
|
fput(file);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2017-04-03 21:26:24 -06:00
|
|
|
/* take a reference to put in the idr */
|
2017-12-19 05:07:00 -07:00
|
|
|
syncobj = file->private_data;
|
2017-04-03 21:26:24 -06:00
|
|
|
drm_syncobj_get(syncobj);
|
|
|
|
|
|
|
|
idr_preload(GFP_KERNEL);
|
|
|
|
spin_lock(&file_private->syncobj_table_lock);
|
|
|
|
ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
|
|
|
|
spin_unlock(&file_private->syncobj_table_lock);
|
|
|
|
idr_preload_end();
|
|
|
|
|
2017-12-19 05:07:00 -07:00
|
|
|
if (ret > 0) {
|
|
|
|
*handle = ret;
|
|
|
|
ret = 0;
|
|
|
|
} else
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
|
|
|
|
fput(file);
|
|
|
|
return ret;
|
2017-04-03 21:26:24 -06:00
|
|
|
}
|
|
|
|
|
2017-09-01 10:53:25 -06:00
|
|
|
static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private,
|
|
|
|
int fd, int handle)
|
2017-04-25 21:09:02 -06:00
|
|
|
{
|
|
|
|
struct dma_fence *fence = sync_file_get_fence(fd);
|
|
|
|
struct drm_syncobj *syncobj;
|
|
|
|
|
|
|
|
if (!fence)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
syncobj = drm_syncobj_find(file_private, handle);
|
|
|
|
if (!syncobj) {
|
|
|
|
dma_fence_put(fence);
|
|
|
|
return -ENOENT;
|
|
|
|
}
|
|
|
|
|
2017-07-05 14:12:44 -06:00
|
|
|
drm_syncobj_replace_fence(syncobj, fence);
|
2017-04-25 21:09:02 -06:00
|
|
|
dma_fence_put(fence);
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-09-01 10:53:25 -06:00
|
|
|
static int drm_syncobj_export_sync_file(struct drm_file *file_private,
|
|
|
|
int handle, int *p_fd)
|
2017-04-25 21:09:02 -06:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct dma_fence *fence;
|
|
|
|
struct sync_file *sync_file;
|
|
|
|
int fd = get_unused_fd_flags(O_CLOEXEC);
|
|
|
|
|
|
|
|
if (fd < 0)
|
|
|
|
return fd;
|
|
|
|
|
2017-08-25 11:52:19 -06:00
|
|
|
ret = drm_syncobj_find_fence(file_private, handle, &fence);
|
2017-04-25 21:09:02 -06:00
|
|
|
if (ret)
|
|
|
|
goto err_put_fd;
|
|
|
|
|
|
|
|
sync_file = sync_file_create(fence);
|
|
|
|
|
|
|
|
dma_fence_put(fence);
|
|
|
|
|
|
|
|
if (!sync_file) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto err_put_fd;
|
|
|
|
}
|
|
|
|
|
|
|
|
fd_install(fd, sync_file->file);
|
|
|
|
|
|
|
|
*p_fd = fd;
|
|
|
|
return 0;
|
|
|
|
err_put_fd:
|
|
|
|
put_unused_fd(fd);
|
|
|
|
return ret;
|
|
|
|
}
|
2017-04-03 21:26:24 -06:00
|
|
|
/**
|
|
|
|
* drm_syncobj_open - initalizes syncobj file-private structures at devnode open time
|
|
|
|
* @file_private: drm file-private structure to set up
|
|
|
|
*
|
|
|
|
* Called at device open time, sets up the structure for handling refcounting
|
|
|
|
* of sync objects.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
drm_syncobj_open(struct drm_file *file_private)
|
|
|
|
{
|
2018-02-12 07:55:33 -07:00
|
|
|
idr_init_base(&file_private->syncobj_idr, 1);
|
2017-04-03 21:26:24 -06:00
|
|
|
spin_lock_init(&file_private->syncobj_table_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
drm_syncobj_release_handle(int id, void *ptr, void *data)
|
|
|
|
{
|
|
|
|
struct drm_syncobj *syncobj = ptr;
|
|
|
|
|
|
|
|
drm_syncobj_put(syncobj);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* drm_syncobj_release - release file-private sync object resources
|
|
|
|
* @file_private: drm file-private structure to clean up
|
|
|
|
*
|
|
|
|
* Called at close time when the filp is going away.
|
|
|
|
*
|
|
|
|
* Releases any remaining references on objects by this filp.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
drm_syncobj_release(struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
idr_for_each(&file_private->syncobj_idr,
|
|
|
|
&drm_syncobj_release_handle, file_private);
|
|
|
|
idr_destroy(&file_private->syncobj_idr);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_create_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_create *args = data;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
/* no valid flags yet */
|
2017-08-25 11:52:25 -06:00
|
|
|
if (args->flags & ~DRM_SYNCOBJ_CREATE_SIGNALED)
|
2017-04-03 21:26:24 -06:00
|
|
|
return -EINVAL;
|
|
|
|
|
2017-09-12 14:42:12 -06:00
|
|
|
return drm_syncobj_create_as_handle(file_private,
|
|
|
|
&args->handle, args->flags);
|
2017-04-03 21:26:24 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_destroy *args = data;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
/* make sure padding is empty */
|
|
|
|
if (args->pad)
|
|
|
|
return -EINVAL;
|
|
|
|
return drm_syncobj_destroy(file_private, args->handle);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_handle *args = data;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
2017-04-25 21:09:02 -06:00
|
|
|
if (args->pad)
|
2017-04-03 21:26:24 -06:00
|
|
|
return -EINVAL;
|
|
|
|
|
2017-04-25 21:09:02 -06:00
|
|
|
if (args->flags != 0 &&
|
|
|
|
args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE)
|
|
|
|
return drm_syncobj_export_sync_file(file_private, args->handle,
|
|
|
|
&args->fd);
|
|
|
|
|
2017-04-03 21:26:24 -06:00
|
|
|
return drm_syncobj_handle_to_fd(file_private, args->handle,
|
|
|
|
&args->fd);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_handle *args = data;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
2017-04-25 21:09:02 -06:00
|
|
|
if (args->pad)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (args->flags != 0 &&
|
|
|
|
args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE)
|
2017-04-03 21:26:24 -06:00
|
|
|
return -EINVAL;
|
|
|
|
|
2017-04-25 21:09:02 -06:00
|
|
|
if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE)
|
|
|
|
return drm_syncobj_import_sync_file_fence(file_private,
|
|
|
|
args->fd,
|
|
|
|
args->handle);
|
|
|
|
|
2017-04-03 21:26:24 -06:00
|
|
|
return drm_syncobj_fd_to_handle(file_private, args->fd,
|
|
|
|
&args->handle);
|
|
|
|
}
|
2017-08-25 11:52:22 -06:00
|
|
|
|
2017-08-25 11:52:24 -06:00
|
|
|
struct syncobj_wait_entry {
|
|
|
|
struct task_struct *task;
|
|
|
|
struct dma_fence *fence;
|
|
|
|
struct dma_fence_cb fence_cb;
|
|
|
|
struct drm_syncobj_cb syncobj_cb;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void syncobj_wait_fence_func(struct dma_fence *fence,
|
|
|
|
struct dma_fence_cb *cb)
|
|
|
|
{
|
|
|
|
struct syncobj_wait_entry *wait =
|
|
|
|
container_of(cb, struct syncobj_wait_entry, fence_cb);
|
|
|
|
|
|
|
|
wake_up_process(wait->task);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
|
|
|
|
struct drm_syncobj_cb *cb)
|
|
|
|
{
|
|
|
|
struct syncobj_wait_entry *wait =
|
|
|
|
container_of(cb, struct syncobj_wait_entry, syncobj_cb);
|
|
|
|
|
|
|
|
/* This happens inside the syncobj lock */
|
2017-11-02 14:03:35 -06:00
|
|
|
wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
|
|
|
|
lockdep_is_held(&syncobj->lock)));
|
2017-08-25 11:52:24 -06:00
|
|
|
wake_up_process(wait->task);
|
|
|
|
}
|
|
|
|
|
|
|
|
static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
|
|
|
|
uint32_t count,
|
|
|
|
uint32_t flags,
|
|
|
|
signed long timeout,
|
|
|
|
uint32_t *idx)
|
|
|
|
{
|
|
|
|
struct syncobj_wait_entry *entries;
|
|
|
|
struct dma_fence *fence;
|
|
|
|
signed long ret;
|
|
|
|
uint32_t signaled_count, i;
|
|
|
|
|
|
|
|
entries = kcalloc(count, sizeof(*entries), GFP_KERNEL);
|
|
|
|
if (!entries)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
/* Walk the list of sync objects and initialize entries. We do
|
|
|
|
* this up-front so that we can properly return -EINVAL if there is
|
|
|
|
* a syncobj with a missing fence and then never have the chance of
|
|
|
|
* returning -EINVAL again.
|
|
|
|
*/
|
|
|
|
signaled_count = 0;
|
|
|
|
for (i = 0; i < count; ++i) {
|
|
|
|
entries[i].task = current;
|
|
|
|
entries[i].fence = drm_syncobj_fence_get(syncobjs[i]);
|
|
|
|
if (!entries[i].fence) {
|
|
|
|
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto cleanup_entries;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dma_fence_is_signaled(entries[i].fence)) {
|
|
|
|
if (signaled_count == 0 && idx)
|
|
|
|
*idx = i;
|
|
|
|
signaled_count++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Initialize ret to the max of timeout and 1. That way, the
|
|
|
|
* default return value indicates a successful wait and not a
|
|
|
|
* timeout.
|
|
|
|
*/
|
|
|
|
ret = max_t(signed long, timeout, 1);
|
|
|
|
|
|
|
|
if (signaled_count == count ||
|
|
|
|
(signaled_count > 0 &&
|
|
|
|
!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL)))
|
|
|
|
goto cleanup_entries;
|
|
|
|
|
|
|
|
/* There's a very annoying laxness in the dma_fence API here, in
|
|
|
|
* that backends are not required to automatically report when a
|
|
|
|
* fence is signaled prior to fence->ops->enable_signaling() being
|
|
|
|
* called. So here if we fail to match signaled_count, we need to
|
|
|
|
* fallthough and try a 0 timeout wait!
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
|
|
|
|
for (i = 0; i < count; ++i) {
|
|
|
|
drm_syncobj_fence_get_or_add_callback(syncobjs[i],
|
|
|
|
&entries[i].fence,
|
|
|
|
&entries[i].syncobj_cb,
|
|
|
|
syncobj_wait_syncobj_func);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
do {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
|
|
|
signaled_count = 0;
|
|
|
|
for (i = 0; i < count; ++i) {
|
|
|
|
fence = entries[i].fence;
|
|
|
|
if (!fence)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (dma_fence_is_signaled(fence) ||
|
|
|
|
(!entries[i].fence_cb.func &&
|
|
|
|
dma_fence_add_callback(fence,
|
|
|
|
&entries[i].fence_cb,
|
|
|
|
syncobj_wait_fence_func))) {
|
|
|
|
/* The fence has been signaled */
|
|
|
|
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL) {
|
|
|
|
signaled_count++;
|
|
|
|
} else {
|
|
|
|
if (idx)
|
|
|
|
*idx = i;
|
|
|
|
goto done_waiting;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (signaled_count == count)
|
|
|
|
goto done_waiting;
|
|
|
|
|
|
|
|
if (timeout == 0) {
|
|
|
|
/* If we are doing a 0 timeout wait and we got
|
|
|
|
* here, then we just timed out.
|
|
|
|
*/
|
|
|
|
ret = 0;
|
|
|
|
goto done_waiting;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = schedule_timeout(ret);
|
|
|
|
|
|
|
|
if (ret > 0 && signal_pending(current))
|
|
|
|
ret = -ERESTARTSYS;
|
|
|
|
} while (ret > 0);
|
|
|
|
|
|
|
|
done_waiting:
|
|
|
|
__set_current_state(TASK_RUNNING);
|
|
|
|
|
|
|
|
cleanup_entries:
|
|
|
|
for (i = 0; i < count; ++i) {
|
|
|
|
if (entries[i].syncobj_cb.func)
|
|
|
|
drm_syncobj_remove_callback(syncobjs[i],
|
|
|
|
&entries[i].syncobj_cb);
|
|
|
|
if (entries[i].fence_cb.func)
|
|
|
|
dma_fence_remove_callback(entries[i].fence,
|
|
|
|
&entries[i].fence_cb);
|
|
|
|
dma_fence_put(entries[i].fence);
|
|
|
|
}
|
|
|
|
kfree(entries);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2017-08-25 11:52:22 -06:00
|
|
|
/**
|
|
|
|
* drm_timeout_abs_to_jiffies - calculate jiffies timeout from absolute value
|
|
|
|
*
|
|
|
|
* @timeout_nsec: timeout nsec component in ns, 0 for poll
|
|
|
|
*
|
|
|
|
* Calculate the timeout in jiffies from an absolute time in sec/nsec.
|
|
|
|
*/
|
|
|
|
static signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec)
|
|
|
|
{
|
|
|
|
ktime_t abs_timeout, now;
|
|
|
|
u64 timeout_ns, timeout_jiffies64;
|
|
|
|
|
|
|
|
/* make 0 timeout means poll - absolute 0 doesn't seem valid */
|
|
|
|
if (timeout_nsec == 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
abs_timeout = ns_to_ktime(timeout_nsec);
|
|
|
|
now = ktime_get();
|
|
|
|
|
|
|
|
if (!ktime_after(abs_timeout, now))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
timeout_ns = ktime_to_ns(ktime_sub(abs_timeout, now));
|
|
|
|
|
|
|
|
timeout_jiffies64 = nsecs_to_jiffies64(timeout_ns);
|
|
|
|
/* clamp timeout to avoid infinite timeout */
|
|
|
|
if (timeout_jiffies64 >= MAX_SCHEDULE_TIMEOUT - 1)
|
|
|
|
return MAX_SCHEDULE_TIMEOUT - 1;
|
|
|
|
|
|
|
|
return timeout_jiffies64 + 1;
|
|
|
|
}
|
|
|
|
|
2017-08-25 11:52:24 -06:00
|
|
|
static int drm_syncobj_array_wait(struct drm_device *dev,
|
|
|
|
struct drm_file *file_private,
|
|
|
|
struct drm_syncobj_wait *wait,
|
|
|
|
struct drm_syncobj **syncobjs)
|
2017-08-25 11:52:22 -06:00
|
|
|
{
|
|
|
|
signed long timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
|
|
|
|
signed long ret = 0;
|
|
|
|
uint32_t first = ~0;
|
|
|
|
|
2017-08-25 11:52:24 -06:00
|
|
|
ret = drm_syncobj_array_wait_timeout(syncobjs,
|
|
|
|
wait->count_handles,
|
|
|
|
wait->flags,
|
|
|
|
timeout, &first);
|
2017-08-25 11:52:22 -06:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
wait->first_signaled = first;
|
|
|
|
if (ret == 0)
|
|
|
|
return -ETIME;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
static int drm_syncobj_array_find(struct drm_file *file_private,
|
2017-09-01 10:53:26 -06:00
|
|
|
void __user *user_handles,
|
|
|
|
uint32_t count_handles,
|
2017-08-25 11:52:26 -06:00
|
|
|
struct drm_syncobj ***syncobjs_out)
|
2017-08-25 11:52:22 -06:00
|
|
|
{
|
2017-08-25 11:52:26 -06:00
|
|
|
uint32_t i, *handles;
|
2017-08-25 11:52:24 -06:00
|
|
|
struct drm_syncobj **syncobjs;
|
2017-08-25 11:52:26 -06:00
|
|
|
int ret;
|
2017-08-25 11:52:22 -06:00
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
handles = kmalloc_array(count_handles, sizeof(*handles), GFP_KERNEL);
|
2017-08-25 11:52:22 -06:00
|
|
|
if (handles == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
if (copy_from_user(handles, user_handles,
|
|
|
|
sizeof(uint32_t) * count_handles)) {
|
2017-08-25 11:52:22 -06:00
|
|
|
ret = -EFAULT;
|
|
|
|
goto err_free_handles;
|
|
|
|
}
|
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
syncobjs = kmalloc_array(count_handles, sizeof(*syncobjs), GFP_KERNEL);
|
|
|
|
if (syncobjs == NULL) {
|
2017-08-25 11:52:22 -06:00
|
|
|
ret = -ENOMEM;
|
|
|
|
goto err_free_handles;
|
|
|
|
}
|
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
for (i = 0; i < count_handles; i++) {
|
2017-08-25 11:52:24 -06:00
|
|
|
syncobjs[i] = drm_syncobj_find(file_private, handles[i]);
|
|
|
|
if (!syncobjs[i]) {
|
|
|
|
ret = -ENOENT;
|
2017-08-25 11:52:26 -06:00
|
|
|
goto err_put_syncobjs;
|
2017-08-25 11:52:24 -06:00
|
|
|
}
|
2017-08-25 11:52:22 -06:00
|
|
|
}
|
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
kfree(handles);
|
|
|
|
*syncobjs_out = syncobjs;
|
|
|
|
return 0;
|
2017-08-25 11:52:22 -06:00
|
|
|
|
2017-08-25 11:52:26 -06:00
|
|
|
err_put_syncobjs:
|
2017-08-25 11:52:24 -06:00
|
|
|
while (i-- > 0)
|
|
|
|
drm_syncobj_put(syncobjs[i]);
|
|
|
|
kfree(syncobjs);
|
2017-08-25 11:52:22 -06:00
|
|
|
err_free_handles:
|
|
|
|
kfree(handles);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2017-08-25 11:52:26 -06:00
|
|
|
|
|
|
|
static void drm_syncobj_array_free(struct drm_syncobj **syncobjs,
|
|
|
|
uint32_t count)
|
|
|
|
{
|
|
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
|
|
drm_syncobj_put(syncobjs[i]);
|
|
|
|
kfree(syncobjs);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_wait *args = data;
|
|
|
|
struct drm_syncobj **syncobjs;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
|
|
|
|
DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (args->count_handles == 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
|
|
u64_to_user_ptr(args->handles),
|
|
|
|
args->count_handles,
|
|
|
|
&syncobjs);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = drm_syncobj_array_wait(dev, file_private,
|
|
|
|
args, syncobjs);
|
|
|
|
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2017-08-28 15:10:27 -06:00
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_array *args = data;
|
|
|
|
struct drm_syncobj **syncobjs;
|
|
|
|
uint32_t i;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (args->pad != 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (args->count_handles == 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
|
|
u64_to_user_ptr(args->handles),
|
|
|
|
args->count_handles,
|
|
|
|
&syncobjs);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
for (i = 0; i < args->count_handles; i++)
|
|
|
|
drm_syncobj_replace_fence(syncobjs[i], NULL);
|
|
|
|
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2017-08-28 15:10:28 -06:00
|
|
|
|
|
|
|
int
|
|
|
|
drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
|
|
|
|
struct drm_file *file_private)
|
|
|
|
{
|
|
|
|
struct drm_syncobj_array *args = data;
|
|
|
|
struct drm_syncobj **syncobjs;
|
|
|
|
uint32_t i;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (args->pad != 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (args->count_handles == 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
|
|
u64_to_user_ptr(args->handles),
|
|
|
|
args->count_handles,
|
|
|
|
&syncobjs);
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|