FM / drm

/usr/src/kernels/4.18.0-553.121.1.el8_10.x86_64/include/drm/

/usr/src/kernels/4.18.0-553.121.1.el8_10.x86_64/include/drm

Name	Size	Mode	Actions
bridge/	-	0755	rm
display/	-	0755	rm
i2c/	-	0755	rm
ttm/	-	0755	rm
amd_asic_type.h	2228	0644	edit dl rm
drm_accel.h	2502	0644	edit dl rm
drm_aperture.h	1160	0644	edit dl rm
drm_atomic.h	42345	0644	edit dl rm
drm_atomic_helper.h	9998	0644	edit dl rm
drm_atomic_state_helper.h	4529	0644	edit dl rm
drm_atomic_uapi.h	2111	0644	edit dl rm
drm_audio_component.h	3935	0644	edit dl rm
drm_auth.h	4754	0644	edit dl rm
drm_blend.h	2407	0644	edit dl rm
drm_bridge.h	34436	0644	edit dl rm
drm_bridge_connector.h	405	0644	edit dl rm
drm_buddy.h	4227	0644	edit dl rm
drm_cache.h	3377	0644	edit dl rm
drm_client.h	5166	0644	edit dl rm
drm_color_mgmt.h	3884	0644	edit dl rm
drm_connector.h	63549	0644	edit dl rm
drm_crtc.h	45886	0644	edit dl rm
drm_crtc_helper.h	2567	0644	edit dl rm
drm_damage_helper.h	3408	0644	edit dl rm
drm_debugfs.h	5058	0644	edit dl rm
drm_debugfs_crc.h	2723	0644	edit dl rm
drm_device.h	9416	0644	edit dl rm
drm_displayid.h	4949	0644	edit dl rm
drm_drv.h	19744	0644	edit dl rm
drm_edid.h	20399	0644	edit dl rm
drm_encoder.h	11087	0644	edit dl rm
drm_encoder_slave.h	6614	0644	edit dl rm
drm_fbdev_generic.h	349	0644	edit dl rm
drm_fb_dma_helper.h	575	0644	edit dl rm
drm_fb_helper.h	14380	0644	edit dl rm
drm_file.h	12827	0644	edit dl rm
drm_fixed.h	4993	0644	edit dl rm
drm_flip_work.h	3080	0644	edit dl rm
drm_format_helper.h	3319	0644	edit dl rm
drm_fourcc.h	10096	0644	edit dl rm
drm_framebuffer.h	10856	0644	edit dl rm
drm_gem.h	13646	0644	edit dl rm
drm_gem_atomic_helper.h	5360	0644	edit dl rm
drm_gem_dma_helper.h	9766	0644	edit dl rm
drm_gem_framebuffer_helper.h	1973	0644	edit dl rm
drm_gem_shmem_helper.h	8597	0644	edit dl rm
drm_gem_ttm_helper.h	822	0644	edit dl rm
drm_gem_vram_helper.h	6286	0644	edit dl rm
drm_ioctl.h	6320	0644	edit dl rm
drm_kunit_helpers.h	3072	0644	edit dl rm
drm_lease.h	1010	0644	edit dl rm
drm_legacy.h	9617	0644	edit dl rm
drm_managed.h	3992	0644	edit dl rm
drm_mipi_dbi.h	6953	0644	edit dl rm
drm_mipi_dsi.h	13449	0644	edit dl rm
drm_mm.h	17950	0644	edit dl rm
drm_modes.h	20381	0644	edit dl rm
drm_modeset_helper.h	1814	0644	edit dl rm
drm_modeset_helper_vtables.h	59622	0644	edit dl rm
drm_modeset_lock.h	7244	0644	edit dl rm
drm_mode_config.h	33729	0644	edit dl rm
drm_mode_object.h	5587	0644	edit dl rm
drm_module.h	3808	0644	edit dl rm
drm_of.h	5016	0644	edit dl rm
drm_panel.h	7100	0644	edit dl rm
drm_pciids.h	62502	0644	edit dl rm
drm_plane.h	30811	0644	edit dl rm
drm_plane_helper.h	2391	0644	edit dl rm
drm_prime.h	4162	0644	edit dl rm
drm_print.h	19215	0644	edit dl rm
drm_privacy_screen_consumer.h	1983	0644	edit dl rm
drm_privacy_screen_driver.h	3058	0644	edit dl rm
drm_privacy_screen_machine.h	1281	0644	edit dl rm
drm_probe_helper.h	1607	0644	edit dl rm
drm_property.h	12042	0644	edit dl rm
drm_rect.h	7338	0644	edit dl rm
drm_self_refresh_helper.h	594	0644	edit dl rm
drm_simple_kms_helper.h	9744	0644	edit dl rm
drm_syncobj.h	3943	0644	edit dl rm
drm_sysfs.h	515	0644	edit dl rm
drm_util.h	2642	0644	edit dl rm
drm_utils.h	504	0644	edit dl rm
drm_vblank.h	9255	0644	edit dl rm
drm_vblank_work.h	1956	0644	edit dl rm
drm_vma_manager.h	8428	0644	edit dl rm
drm_writeback.h	4552	0644	edit dl rm
gma_drm.h	413	0644	edit dl rm
gpu_scheduler.h	19364	0644	edit dl rm
gud.h	11934	0644	edit dl rm
i915_component.h	1825	0644	edit dl rm
i915_drm.h	3655	0644	edit dl rm
i915_mei_hdcp_interface.h	5907	0644	edit dl rm
i915_pciids.h	24003	0644	edit dl rm
i915_pxp_tee_interface.h	1250	0644	edit dl rm
intel-gtt.h	1015	0644	edit dl rm
intel_lpe_audio.h	1758	0644	edit dl rm
spsc_queue.h	3131	0644	edit dl rm
task_barrier.h	3020	0644	edit dl rm

Edit: /usr/src/kernels/4.18.0-553.121.1.el8_10.x86_64/include/drm/drm_modeset_lock.h (7244B)

/*
 * Copyright (C) 2014 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 */

#ifndef DRM_MODESET_LOCK_H_
#define DRM_MODESET_LOCK_H_

#include <linux/types.h> /* stackdepot.h is not self-contained */
#include <linux/stackdepot.h>
#include <linux/ww_mutex.h>

struct drm_modeset_lock;

/**
 * struct drm_modeset_acquire_ctx - locking context (see ww_acquire_ctx)
 * @ww_ctx: base acquire ctx
 * @contended: used internally for -EDEADLK handling
 * @stack_depot: used internally for contention debugging
 * @locked: list of held locks
 * @trylock_only: trylock mode used in atomic contexts/panic notifiers
 * @interruptible: whether interruptible locking should be used.
 *
 * Each thread competing for a set of locks must use one acquire
 * ctx.  And if any lock fxn returns -EDEADLK, it must backoff and
 * retry.
 */
struct drm_modeset_acquire_ctx {

struct ww_acquire_ctx ww_ctx;

/*
	 * Contended lock: if a lock is contended you should only call
	 * drm_modeset_backoff() which drops locks and slow-locks the
	 * contended lock.
	 */
	struct drm_modeset_lock *contended;

/*
	 * Stack depot for debugging when a contended lock was not backed off
	 * from.
	 */
	depot_stack_handle_t stack_depot;

/*
	 * list of held locks (drm_modeset_lock)
	 */
	struct list_head locked;

/*
	 * Trylock mode, use only for panic handlers!
	 */
	bool trylock_only;

/* Perform interruptible waits on this context. */
	bool interruptible;
};

/**
 * struct drm_modeset_lock - used for locking modeset resources.
 * @mutex: resource locking
 * @head: used to hold its place on &drm_atomi_state.locked list when
 *    part of an atomic update
 *
 * Used for locking CRTCs and other modeset resources.
 */
struct drm_modeset_lock {
	/*
	 * modeset lock
	 */
	struct ww_mutex mutex;

/*
	 * Resources that are locked as part of an atomic update are added
	 * to a list (so we know what to unlock at the end).
	 */
	struct list_head head;
};

#define DRM_MODESET_ACQUIRE_INTERRUPTIBLE BIT(0)

void drm_modeset_acquire_init(struct drm_modeset_acquire_ctx *ctx,
		uint32_t flags);
void drm_modeset_acquire_fini(struct drm_modeset_acquire_ctx *ctx);
void drm_modeset_drop_locks(struct drm_modeset_acquire_ctx *ctx);
int drm_modeset_backoff(struct drm_modeset_acquire_ctx *ctx);

void drm_modeset_lock_init(struct drm_modeset_lock *lock);

/**
 * drm_modeset_lock_fini - cleanup lock
 * @lock: lock to cleanup
 */
static inline void drm_modeset_lock_fini(struct drm_modeset_lock *lock)
{
	WARN_ON(!list_empty(&lock->head));
}

/**
 * drm_modeset_is_locked - equivalent to mutex_is_locked()
 * @lock: lock to check
 */
static inline bool drm_modeset_is_locked(struct drm_modeset_lock *lock)
{
	return ww_mutex_is_locked(&lock->mutex);
}

/**
 * drm_modeset_lock_assert_held - equivalent to lockdep_assert_held()
 * @lock: lock to check
 */
static inline void drm_modeset_lock_assert_held(struct drm_modeset_lock *lock)
{
	lockdep_assert_held(&lock->mutex.base);
}

int drm_modeset_lock(struct drm_modeset_lock *lock,
		struct drm_modeset_acquire_ctx *ctx);
int __must_check drm_modeset_lock_single_interruptible(struct drm_modeset_lock *lock);
void drm_modeset_unlock(struct drm_modeset_lock *lock);

struct drm_device;
struct drm_crtc;
struct drm_plane;

void drm_modeset_lock_all(struct drm_device *dev);
void drm_modeset_unlock_all(struct drm_device *dev);
void drm_warn_on_modeset_not_all_locked(struct drm_device *dev);

int drm_modeset_lock_all_ctx(struct drm_device *dev,
			     struct drm_modeset_acquire_ctx *ctx);

/**
 * DRM_MODESET_LOCK_ALL_BEGIN - Helper to acquire modeset locks
 * @dev: drm device
 * @ctx: local modeset acquire context, will be dereferenced
 * @flags: DRM_MODESET_ACQUIRE_* flags to pass to drm_modeset_acquire_init()
 * @ret: local ret/err/etc variable to track error status
 *
 * Use these macros to simplify grabbing all modeset locks using a local
 * context. This has the advantage of reducing boilerplate, but also properly
 * checking return values where appropriate.
 *
 * Any code run between BEGIN and END will be holding the modeset locks.
 *
 * This must be paired with DRM_MODESET_LOCK_ALL_END(). We will jump back and
 * forth between the labels on deadlock and error conditions.
 *
 * Drivers can acquire additional modeset locks. If any lock acquisition
 * fails, the control flow needs to jump to DRM_MODESET_LOCK_ALL_END() with
 * the @ret parameter containing the return value of drm_modeset_lock().
 *
 * Returns:
 * The only possible value of ret immediately after DRM_MODESET_LOCK_ALL_BEGIN()
 * is 0, so no error checking is necessary
 */
#define DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, flags, ret)		\
	if (!drm_drv_uses_atomic_modeset(dev))				\
		mutex_lock(&dev->mode_config.mutex);			\
	drm_modeset_acquire_init(&ctx, flags);				\
modeset_lock_retry:							\
	ret = drm_modeset_lock_all_ctx(dev, &ctx);			\
	if (ret)							\
		goto modeset_lock_fail;

/**
 * DRM_MODESET_LOCK_ALL_END - Helper to release and cleanup modeset locks
 * @dev: drm device
 * @ctx: local modeset acquire context, will be dereferenced
 * @ret: local ret/err/etc variable to track error status
 *
 * The other side of DRM_MODESET_LOCK_ALL_BEGIN(). It will bounce back to BEGIN
 * if ret is -EDEADLK.
 *
 * It's important that you use the same ret variable for begin and end so
 * deadlock conditions are properly handled.
 *
 * Returns:
 * ret will be untouched unless it is -EDEADLK on entry. That means that if you
 * successfully acquire the locks, ret will be whatever your code sets it to. If
 * there is a deadlock or other failure with acquire or backoff, ret will be set
 * to that failure. In both of these cases the code between BEGIN/END will not
 * be run, so the failure will reflect the inability to grab the locks.
 */
#define DRM_MODESET_LOCK_ALL_END(dev, ctx, ret)				\
modeset_lock_fail:							\
	if (ret == -EDEADLK) {						\
		ret = drm_modeset_backoff(&ctx);			\
		if (!ret)						\
			goto modeset_lock_retry;			\
	}								\
	drm_modeset_drop_locks(&ctx);					\
	drm_modeset_acquire_fini(&ctx);					\
	if (!drm_drv_uses_atomic_modeset(dev))				\
		mutex_unlock(&dev->mode_config.mutex);

#endif /* DRM_MODESET_LOCK_H_ */

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