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* SPDX-License-Identifier: MIT
* Copyright © 2019 Intel Corporation
#ifndef _I915_ACTIVE_TYPES_H_
#define _I915_ACTIVE_TYPES_H_
#include <linux/atomic.h>
#include <linux/llist.h>
#include <linux/mutex.h>
#include <linux/rbtree.h>
#include <linux/rcupdate.h>
struct drm_i915_private;
struct i915_active_request;
struct i915_request;
typedef void (*i915_active_retire_fn)(struct i915_active_request *,
struct i915_request *);
struct i915_active_request {
struct i915_request __rcu *request;
struct list_head link;
i915_active_retire_fn retire;
* Incorporeal!
* Updates to the i915_active_request must be serialised under a lock
* to ensure that the timeline is ordered. Normally, this is the
* timeline->mutex, but another mutex may be used so long as it is
* done so consistently.
* For lockdep tracking of the above, we store the lock we intend
* to always use for updates of this i915_active_request during
* construction and assert that is held on every update.
struct mutex *lock;
struct active_node;
struct i915_active {
struct drm_i915_private *i915;
struct active_node *cache;
struct rb_root tree;
struct mutex mutex;
atomic_t count;
unsigned long flags;
#define I915_ACTIVE_GRAB_BIT 0
int (*active)(struct i915_active *ref);
void (*retire)(struct i915_active *ref);
struct llist_head preallocated_barriers;
#endif /* _I915_ACTIVE_TYPES_H_ */