__ __ __ __ _____ _ _ _____ _ _ _ | \/ | \ \ / / | __ \ (_) | | / ____| | | | | | \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | | | |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | | | | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | | |_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1 if you need WebShell for Seo everyday contact me on Telegram Telegram Address : @jackleetFor_More_Tools:
/*
* 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_ */
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| bridge | Folder | 0755 |
|
|
| clients | Folder | 0755 |
|
|
| display | Folder | 0755 |
|
|
| intel | Folder | 0755 |
|
|
| ttm | Folder | 0755 |
|
|
| Makefile | File | 642 B | 0644 |
|
| amd_asic_type.h | File | 2.35 KB | 0644 |
|
| drm_accel.h | File | 2.25 KB | 0644 |
|
| drm_atomic.h | File | 44.79 KB | 0644 |
|
| drm_atomic_helper.h | File | 10.88 KB | 0644 |
|
| drm_atomic_state_helper.h | File | 4.42 KB | 0644 |
|
| drm_atomic_uapi.h | File | 2.06 KB | 0644 |
|
| drm_audio_component.h | File | 3.84 KB | 0644 |
|
| drm_auth.h | File | 4.18 KB | 0644 |
|
| drm_blend.h | File | 2.35 KB | 0644 |
|
| drm_bridge.h | File | 38.1 KB | 0644 |
|
| drm_bridge_connector.h | File | 405 B | 0644 |
|
| drm_buddy.h | File | 4.51 KB | 0644 |
|
| drm_cache.h | File | 3.3 KB | 0644 |
|
| drm_client.h | File | 6.45 KB | 0644 |
|
| drm_client_event.h | File | 923 B | 0644 |
|
| drm_color_mgmt.h | File | 3.91 KB | 0644 |
|
| drm_connector.h | File | 74.11 KB | 0644 |
|
| drm_crtc.h | File | 44.58 KB | 0644 |
|
| drm_crtc_helper.h | File | 2.51 KB | 0644 |
|
| drm_damage_helper.h | File | 3.33 KB | 0644 |
|
| drm_debugfs.h | File | 5.68 KB | 0644 |
|
| drm_debugfs_crc.h | File | 2.76 KB | 0644 |
|
| drm_device.h | File | 8.08 KB | 0644 |
|
| drm_drv.h | File | 17.24 KB | 0644 |
|
| drm_edid.h | File | 15.5 KB | 0644 |
|
| drm_eld.h | File | 4.76 KB | 0644 |
|
| drm_encoder.h | File | 11.07 KB | 0644 |
|
| drm_exec.h | File | 4.3 KB | 0644 |
|
| drm_fb_dma_helper.h | File | 718 B | 0644 |
|
| drm_fb_helper.h | File | 12.03 KB | 0644 |
|
| drm_fbdev_dma.h | File | 461 B | 0644 |
|
| drm_fbdev_shmem.h | File | 475 B | 0644 |
|
| drm_fbdev_ttm.h | File | 488 B | 0644 |
|
| drm_file.h | File | 14.54 KB | 0644 |
|
| drm_fixed.h | File | 5.29 KB | 0644 |
|
| drm_flip_work.h | File | 2.63 KB | 0644 |
|
| drm_format_helper.h | File | 5.8 KB | 0644 |
|
| drm_fourcc.h | File | 9.99 KB | 0644 |
|
| drm_framebuffer.h | File | 10.04 KB | 0644 |
|
| drm_gem.h | File | 18.94 KB | 0644 |
|
| drm_gem_atomic_helper.h | File | 5.52 KB | 0644 |
|
| drm_gem_dma_helper.h | File | 9.26 KB | 0644 |
|
| drm_gem_framebuffer_helper.h | File | 1.93 KB | 0644 |
|
| drm_gem_shmem_helper.h | File | 8.22 KB | 0644 |
|
| drm_gem_ttm_helper.h | File | 822 B | 0644 |
|
| drm_gem_vram_helper.h | File | 5.73 KB | 0644 |
|
| drm_gpusvm.h | File | 16.72 KB | 0644 |
|
| drm_gpuvm.h | File | 33.62 KB | 0644 |
|
| drm_ioctl.h | File | 5.82 KB | 0644 |
|
| drm_kunit_helpers.h | File | 4.12 KB | 0644 |
|
| drm_lease.h | File | 1.01 KB | 0644 |
|
| drm_managed.h | File | 4.39 KB | 0644 |
|
| drm_mipi_dbi.h | File | 7.08 KB | 0644 |
|
| drm_mipi_dsi.h | File | 17.54 KB | 0644 |
|
| drm_mm.h | File | 17.46 KB | 0644 |
|
| drm_mode_config.h | File | 32.7 KB | 0644 |
|
| drm_mode_object.h | File | 5.45 KB | 0644 |
|
| drm_modes.h | File | 19.99 KB | 0644 |
|
| drm_modeset_helper.h | File | 1.77 KB | 0644 |
|
| drm_modeset_helper_vtables.h | File | 61.26 KB | 0644 |
|
| drm_modeset_lock.h | File | 7.07 KB | 0644 |
|
| drm_module.h | File | 3.72 KB | 0644 |
|
| drm_of.h | File | 5.25 KB | 0644 |
|
| drm_pagemap.h | File | 2.98 KB | 0644 |
|
| drm_panel.h | File | 8.87 KB | 0644 |
|
| drm_panic.h | File | 5.56 KB | 0644 |
|
| drm_pciids.h | File | 61.04 KB | 0644 |
|
| drm_plane.h | File | 31.3 KB | 0644 |
|
| drm_plane_helper.h | File | 2.22 KB | 0644 |
|
| drm_prime.h | File | 4.21 KB | 0644 |
|
| drm_print.h | File | 22.74 KB | 0644 |
|
| drm_privacy_screen_consumer.h | File | 1.94 KB | 0644 |
|
| drm_privacy_screen_driver.h | File | 2.99 KB | 0644 |
|
| drm_privacy_screen_machine.h | File | 1.25 KB | 0644 |
|
| drm_probe_helper.h | File | 1.68 KB | 0644 |
|
| drm_property.h | File | 11.99 KB | 0644 |
|
| drm_rect.h | File | 7.52 KB | 0644 |
|
| drm_self_refresh_helper.h | File | 594 B | 0644 |
|
| drm_simple_kms_helper.h | File | 9.52 KB | 0644 |
|
| drm_suballoc.h | File | 2.74 KB | 0644 |
|
| drm_syncobj.h | File | 3.95 KB | 0644 |
|
| drm_sysfs.h | File | 512 B | 0644 |
|
| drm_util.h | File | 2.2 KB | 0644 |
|
| drm_utils.h | File | 592 B | 0644 |
|
| drm_vblank.h | File | 10.18 KB | 0644 |
|
| drm_vblank_work.h | File | 1.99 KB | 0644 |
|
| drm_vma_manager.h | File | 8.23 KB | 0644 |
|
| drm_writeback.h | File | 4.67 KB | 0644 |
|
| gpu_scheduler.h | File | 20.46 KB | 0644 |
|
| gud.h | File | 11.65 KB | 0644 |
|
| i915_pciids.h | File | 27.05 KB | 0644 |
|
| spsc_queue.h | File | 3.06 KB | 0644 |
|
| task_barrier.h | File | 2.95 KB | 0644 |
|