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118 lines
3.0 KiB
118 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* include/linux/node.h - generic node definition |
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* |
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* This is mainly for topological representation. We define the |
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* basic 'struct node' here, which can be embedded in per-arch |
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* definitions of processors. |
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* |
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* Basic handling of the devices is done in drivers/base/node.c |
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* and system devices are handled in drivers/base/sys.c. |
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* |
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* Nodes are exported via driverfs in the class/node/devices/ |
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* directory. |
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*/ |
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#ifndef _LINUX_NODE_H_ |
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#define _LINUX_NODE_H_ |
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#include <linux/device.h> |
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#include <linux/cpumask.h> |
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#include <linux/workqueue.h> |
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struct node { |
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struct device dev; |
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#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS) |
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struct work_struct node_work; |
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#endif |
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}; |
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struct memory_block; |
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extern struct node *node_devices[]; |
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typedef void (*node_registration_func_t)(struct node *); |
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#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_NUMA) |
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extern int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages); |
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#else |
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static inline int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages) |
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{ |
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return 0; |
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} |
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#endif |
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extern void unregister_node(struct node *node); |
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#ifdef CONFIG_NUMA |
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/* Core of the node registration - only memory hotplug should use this */ |
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extern int __register_one_node(int nid); |
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/* Registers an online node */ |
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static inline int register_one_node(int nid) |
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{ |
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int error = 0; |
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if (node_online(nid)) { |
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struct pglist_data *pgdat = NODE_DATA(nid); |
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error = __register_one_node(nid); |
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if (error) |
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return error; |
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/* link memory sections under this node */ |
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error = link_mem_sections(nid, pgdat->node_start_pfn, pgdat->node_spanned_pages); |
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} |
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return error; |
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} |
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extern void unregister_one_node(int nid); |
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extern int register_cpu_under_node(unsigned int cpu, unsigned int nid); |
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extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid); |
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extern int register_mem_sect_under_node(struct memory_block *mem_blk, |
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int nid); |
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extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
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unsigned long phys_index); |
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#ifdef CONFIG_HUGETLBFS |
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extern void register_hugetlbfs_with_node(node_registration_func_t doregister, |
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node_registration_func_t unregister); |
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#endif |
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#else |
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static inline int __register_one_node(int nid) |
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{ |
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return 0; |
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} |
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static inline int register_one_node(int nid) |
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{ |
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return 0; |
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} |
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static inline int unregister_one_node(int nid) |
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{ |
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return 0; |
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} |
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static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) |
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{ |
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return 0; |
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} |
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static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) |
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{ |
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return 0; |
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} |
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static inline int register_mem_sect_under_node(struct memory_block *mem_blk, |
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int nid) |
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{ |
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return 0; |
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} |
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static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
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unsigned long phys_index) |
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{ |
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return 0; |
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} |
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static inline void register_hugetlbfs_with_node(node_registration_func_t reg, |
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node_registration_func_t unreg) |
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{ |
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} |
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#endif |
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#define to_node(device) container_of(device, struct node, dev) |
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#endif /* _LINUX_NODE_H_ */
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