| /* |
| * 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; |
| #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) |
| /* |
| * 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; |
| #endif |
| }; |
| |
| 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_ */ |