/* SPDX-License-Identifier: GPL-2.0-only *//* * async.h: Asynchronous function calls for boot performance * * (C) Copyright 2009 Intel Corporation * Author: Arjan van de Ven <arjan@linux.intel.com> */#ifndef __ASYNC_H__#define __ASYNC_H__ #include <linux/types.h>#include <linux/list.h>#include <linux/numa.h>#include <linux/device.h> typedef u64 async_cookie_t;typedef void (*async_func_t) (void *data, async_cookie_t cookie);struct async_domain {	struct list_head pending;	unsigned registered:1;}; /* * domain participates in global async_synchronize_full */#define ASYNC_DOMAIN(_name) \	struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending),	\				      .registered = 1 } /* * domain is free to go out of scope as soon as all pending work is * complete, this domain does not participate in async_synchronize_full */#define ASYNC_DOMAIN_EXCLUSIVE(_name) \	struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \				      .registered = 0 } async_cookie_t async_schedule_node(async_func_t func, void *data,				   int node);async_cookie_t async_schedule_node_domain(async_func_t func, void *data,					  int node,					  struct async_domain *domain); /** * async_schedule - schedule a function for asynchronous execution * @func: function to execute asynchronously * @data: data pointer to pass to the function * * Returns an async_cookie_t that may be used for checkpointing later. * Note: This function may be called from atomic or non-atomic contexts. */static inline async_cookie_t async_schedule(async_func_t func, void *data){	return async_schedule_node(func, data, NUMA_NO_NODE);} /** * async_schedule_domain - schedule a function for asynchronous execution within a certain domain * @func: function to execute asynchronously * @data: data pointer to pass to the function * @domain: the domain * * Returns an async_cookie_t that may be used for checkpointing later. * @domain may be used in the async_synchronize_*_domain() functions to * wait within a certain synchronization domain rather than globally. * Note: This function may be called from atomic or non-atomic contexts. */static inline async_cookie_tasync_schedule_domain(async_func_t func, void *data,		      struct async_domain *domain){	return async_schedule_node_domain(func, data, NUMA_NO_NODE, domain);} /** * async_schedule_dev - A device specific version of async_schedule * @func: function to execute asynchronously * @dev: device argument to be passed to function * * Returns an async_cookie_t that may be used for checkpointing later. * @dev is used as both the argument for the function and to provide NUMA * context for where to run the function. By doing this we can try to * provide for the best possible outcome by operating on the device on the * CPUs closest to the device. * Note: This function may be called from atomic or non-atomic contexts. */static inline async_cookie_tasync_schedule_dev(async_func_t func, struct device *dev){	return async_schedule_node(func, dev, dev_to_node(dev));} bool async_schedule_dev_nocall(async_func_t func, struct device *dev); /** * async_schedule_dev_domain - A device specific version of async_schedule_domain * @func: function to execute asynchronously * @dev: device argument to be passed to function * @domain: the domain * * Returns an async_cookie_t that may be used for checkpointing later. * @dev is used as both the argument for the function and to provide NUMA * context for where to run the function. By doing this we can try to * provide for the best possible outcome by operating on the device on the * CPUs closest to the device. * @domain may be used in the async_synchronize_*_domain() functions to * wait within a certain synchronization domain rather than globally. * Note: This function may be called from atomic or non-atomic contexts. */static inline async_cookie_tasync_schedule_dev_domain(async_func_t func, struct device *dev,			  struct async_domain *domain){	return async_schedule_node_domain(func, dev, dev_to_node(dev), domain);} extern void async_synchronize_full(void);extern void async_synchronize_full_domain(struct async_domain *domain);extern void async_synchronize_cookie(async_cookie_t cookie);extern void async_synchronize_cookie_domain(async_cookie_t cookie,					    struct async_domain *domain);extern bool current_is_async(void);extern void async_init(void);#endif