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usr
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src
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linux-headers-6.8.0-83-generic
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include
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drm
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drm_managed.h
// SPDX-License-Identifier: GPL-2.0 #ifndef _DRM_MANAGED_H_ #define _DRM_MANAGED_H_ #include <linux/gfp.h> #include <linux/overflow.h> #include <linux/types.h> struct drm_device; struct mutex; typedef void (*drmres_release_t)(struct drm_device *dev, void *res); /** * drmm_add_action - add a managed release action to a &drm_device * @dev: DRM device * @action: function which should be called when @dev is released * @data: opaque pointer, passed to @action * * This function adds the @release action with optional parameter @data to the * list of cleanup actions for @dev. The cleanup actions will be run in reverse * order in the final drm_dev_put() call for @dev. */ #define drmm_add_action(dev, action, data) \ __drmm_add_action(dev, action, data, #action) int __must_check __drmm_add_action(struct drm_device *dev, drmres_release_t action, void *data, const char *name); /** * drmm_add_action_or_reset - add a managed release action to a &drm_device * @dev: DRM device * @action: function which should be called when @dev is released * @data: opaque pointer, passed to @action * * Similar to drmm_add_action(), with the only difference that upon failure * @action is directly called for any cleanup work necessary on failures. */ #define drmm_add_action_or_reset(dev, action, data) \ __drmm_add_action_or_reset(dev, action, data, #action) int __must_check __drmm_add_action_or_reset(struct drm_device *dev, drmres_release_t action, void *data, const char *name); void *drmm_kmalloc(struct drm_device *dev, size_t size, gfp_t gfp) __malloc; /** * drmm_kzalloc - &drm_device managed kzalloc() * @dev: DRM device * @size: size of the memory allocation * @gfp: GFP allocation flags * * This is a &drm_device managed version of kzalloc(). The allocated memory is * automatically freed on the final drm_dev_put(). Memory can also be freed * before the final drm_dev_put() by calling drmm_kfree(). */ static inline void *drmm_kzalloc(struct drm_device *dev, size_t size, gfp_t gfp) { return drmm_kmalloc(dev, size, gfp | __GFP_ZERO); } /** * drmm_kmalloc_array - &drm_device managed kmalloc_array() * @dev: DRM device * @n: number of array elements to allocate * @size: size of array member * @flags: GFP allocation flags * * This is a &drm_device managed version of kmalloc_array(). The allocated * memory is automatically freed on the final drm_dev_put() and works exactly * like a memory allocation obtained by drmm_kmalloc(). */ static inline void *drmm_kmalloc_array(struct drm_device *dev, size_t n, size_t size, gfp_t flags) { size_t bytes; if (unlikely(check_mul_overflow(n, size, &bytes))) return NULL; return drmm_kmalloc(dev, bytes, flags); } /** * drmm_kcalloc - &drm_device managed kcalloc() * @dev: DRM device * @n: number of array elements to allocate * @size: size of array member * @flags: GFP allocation flags * * This is a &drm_device managed version of kcalloc(). The allocated memory is * automatically freed on the final drm_dev_put() and works exactly like a * memory allocation obtained by drmm_kmalloc(). */ static inline void *drmm_kcalloc(struct drm_device *dev, size_t n, size_t size, gfp_t flags) { return drmm_kmalloc_array(dev, n, size, flags | __GFP_ZERO); } char *drmm_kstrdup(struct drm_device *dev, const char *s, gfp_t gfp); void drmm_kfree(struct drm_device *dev, void *data); void __drmm_mutex_release(struct drm_device *dev, void *res); /** * drmm_mutex_init - &drm_device-managed mutex_init() * @dev: DRM device * @lock: lock to be initialized * * Returns: * 0 on success, or a negative errno code otherwise. * * This is a &drm_device-managed version of mutex_init(). The initialized * lock is automatically destroyed on the final drm_dev_put(). */ #define drmm_mutex_init(dev, lock) ({ \ mutex_init(lock); \ drmm_add_action_or_reset(dev, __drmm_mutex_release, lock); \ }) \ #endif
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