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