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/usr/src/linux-headers-6.8.0-106/include/drm/

Edit File: drm_syncobj.h

/*
 * Copyright © 2017 Red Hat
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *
 */
#ifndef __DRM_SYNCOBJ_H__
#define __DRM_SYNCOBJ_H__

#include <linux/dma-fence.h>
#include <linux/dma-fence-chain.h>

struct drm_file;

/**
 * struct drm_syncobj - sync object.
 *
 * This structure defines a generic sync object which wraps a &dma_fence.
 */
struct drm_syncobj {
	/**
	 * @refcount: Reference count of this object.
	 */
	struct kref refcount;
	/**
	 * @fence:
	 * NULL or a pointer to the fence bound to this object.
	 *
	 * This field should not be used directly. Use drm_syncobj_fence_get()
	 * and drm_syncobj_replace_fence() instead.
	 */
	struct dma_fence __rcu *fence;
	/**
	 * @cb_list: List of callbacks to call when the &fence gets replaced.
	 */
	struct list_head cb_list;
	/**
	 * @ev_fd_list: List of registered eventfd.
	 */
	struct list_head ev_fd_list;
	/**
	 * @lock: Protects &cb_list and &ev_fd_list, and write-locks &fence.
	 */
	spinlock_t lock;
	/**
	 * @file: A file backing for this syncobj.
	 */
	struct file *file;
};

void drm_syncobj_free(struct kref *kref);

/**
 * drm_syncobj_get - acquire a syncobj reference
 * @obj: sync object
 *
 * This acquires an additional reference to @obj. It is illegal to call this
 * without already holding a reference. No locks required.
 */
static inline void
drm_syncobj_get(struct drm_syncobj *obj)
{
	kref_get(&obj->refcount);
}

/**
 * drm_syncobj_put - release a reference to a sync object.
 * @obj: sync object.
 */
static inline void
drm_syncobj_put(struct drm_syncobj *obj)
{
	kref_put(&obj->refcount, drm_syncobj_free);
}

/**
 * drm_syncobj_fence_get - get a reference to a fence in a sync object
 * @syncobj: sync object.
 *
 * This acquires additional reference to &drm_syncobj.fence contained in @obj,
 * if not NULL. It is illegal to call this without already holding a reference.
 * No locks required.
 *
 * Returns:
 * Either the fence of @obj or NULL if there's none.
 */
static inline struct dma_fence *
drm_syncobj_fence_get(struct drm_syncobj *syncobj)
{
	struct dma_fence *fence;

rcu_read_lock();
	fence = dma_fence_get_rcu_safe(&syncobj->fence);
	rcu_read_unlock();

return fence;
}

struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
				     u32 handle);
void drm_syncobj_add_point(struct drm_syncobj *syncobj,
			   struct dma_fence_chain *chain,
			   struct dma_fence *fence,
			   uint64_t point);
void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
			       struct dma_fence *fence);
int drm_syncobj_find_fence(struct drm_file *file_private,
			   u32 handle, u64 point, u64 flags,
			   struct dma_fence **fence);
void drm_syncobj_free(struct kref *kref);
int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
		       struct dma_fence *fence);
int drm_syncobj_get_handle(struct drm_file *file_private,
			   struct drm_syncobj *syncobj, u32 *handle);
int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd);

#endif

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Listing directory:

Name	Size	Modify	Owner/Group	Perms	Action	Select
amd_asic_type.h	2.33 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
bridge	DIR	14.03.2026 08:07:35	0/0	drwxr-xr-x	Edit Rename
display	DIR	14.03.2026 08:07:35	0/0	drwxr-xr-x	Edit Rename
drm_accel.h	2.25 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_aperture.h	1.06 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_atomic.h	42.54 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_atomic_helper.h	10.78 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_atomic_state_helper.h	4.42 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_atomic_uapi.h	2.06 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_audio_component.h	3.84 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_auth.h	4.18 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_blend.h	2.35 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_bridge.h	34.88 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_bridge_connector.h	405 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_buddy.h	4.17 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_cache.h	3.3 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_client.h	5.04 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_color_mgmt.h	3.91 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_connector.h	65.08 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_crtc.h	44.52 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_crtc_helper.h	2.51 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_damage_helper.h	3.33 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_debugfs.h	5.68 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_debugfs_crc.h	2.66 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_device.h	7.64 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_displayid.h	4.99 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_drv.h	17.81 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_edid.h	15.48 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_eld.h	4.76 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_encoder.h	11.07 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_encoder_slave.h	6.46 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_exec.h	4.29 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_fb_dma_helper.h	575 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_fb_helper.h	11.75 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_fbdev_dma.h	656 B	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_fbdev_generic.h	349 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_file.h	14.24 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_fixed.h	4.83 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_flip_work.h	2.63 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_format_helper.h	5.33 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_fourcc.h	9.91 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_framebuffer.h	10.04 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_gem.h	18.6 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_gem_atomic_helper.h	5.52 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_gem_dma_helper.h	9.26 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_gem_framebuffer_helper.h	1.93 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_gem_shmem_helper.h	7.93 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_gem_ttm_helper.h	822 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_gem_vram_helper.h	6.08 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_gpuvm.h	33.54 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_ioctl.h	5.82 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_kunit_helpers.h	4.21 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_lease.h	1010 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_managed.h	3.9 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_mipi_dbi.h	6.87 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_mipi_dsi.h	13.22 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_mm.h	17.53 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_mode_config.h	32.81 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_mode_object.h	5.46 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_modes.h	19.9 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_modeset_helper.h	1.77 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_modeset_helper_vtables.h	59.37 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_modeset_lock.h	7.07 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_module.h	3.72 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_of.h	5.22 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_panel.h	8.89 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_pciids.h	61.04 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_plane.h	30.92 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_plane_helper.h	2.22 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_prime.h	4.06 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_print.h	20.39 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_privacy_screen_consumer.h	1.94 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_privacy_screen_driver.h	2.99 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_privacy_screen_machine.h	1.25 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_probe_helper.h	1.57 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_property.h	11.99 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_rect.h	7.17 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_self_refresh_helper.h	594 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_simple_kms_helper.h	9.52 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_suballoc.h	2.75 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_syncobj.h	3.95 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_sysfs.h	512 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_util.h	2.58 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_utils.h	592 B	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_vblank.h	10.18 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
drm_vblank_work.h	1.91 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_vma_manager.h	8.23 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
drm_writeback.h	4.45 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
gma_drm.h	413 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
gpu_scheduler.h	20.85 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
gud.h	11.65 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
i2c	DIR	14.03.2026 08:07:35	0/0	drwxr-xr-x	Edit Rename
i915_component.h	1.81 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
i915_drm.h	3.57 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
i915_gsc_proxy_mei_interface.h	1.52 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
i915_hdcp_interface.h	16.22 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
i915_pciids.h	23.94 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
i915_pxp_tee_interface.h	1.28 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
intel-gtt.h	1015 B	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
intel_lpe_audio.h	1.72 KB	10.03.2024 20:38:09	0/0	-rw-r--r--	Edit Rename Download
spsc_queue.h	3.08 KB	06.03.2026 00:43:25	0/0	-rw-r--r--	Edit Rename Download
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