| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * include/linux/node.h - generic node definition |
| 3 | * |
| 4 | * This is mainly for topological representation. We define the |
| 5 | * basic 'struct node' here, which can be embedded in per-arch |
| 6 | * definitions of processors. |
| 7 | * |
| 8 | * Basic handling of the devices is done in drivers/base/node.c |
| 9 | * and system devices are handled in drivers/base/sys.c. |
| 10 | * |
| 11 | * Nodes are exported via driverfs in the class/node/devices/ |
| 12 | * directory. |
| 13 | */ |
| 14 | #ifndef _LINUX_NODE_H_ |
| 15 | #define _LINUX_NODE_H_ |
| 16 | |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/cpumask.h> |
| 19 | #include <linux/workqueue.h> |
| 20 | |
| 21 | struct node { |
| 22 | struct device dev; |
| 23 | |
| 24 | #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS) |
| 25 | struct work_struct node_work; |
| 26 | #endif |
| 27 | }; |
| 28 | |
| 29 | struct memory_block; |
| 30 | extern struct node *node_devices[]; |
| 31 | typedef void (*node_registration_func_t)(struct node *); |
| 32 | |
| 33 | extern void unregister_node(struct node *node); |
| 34 | #ifdef CONFIG_NUMA |
| 35 | extern int register_one_node(int nid); |
| 36 | extern void unregister_one_node(int nid); |
| 37 | extern int register_cpu_under_node(unsigned int cpu, unsigned int nid); |
| 38 | extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid); |
| 39 | extern int register_mem_sect_under_node(struct memory_block *mem_blk, |
| 40 | int nid); |
| 41 | extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
| 42 | unsigned long phys_index); |
| 43 | |
| 44 | #ifdef CONFIG_HUGETLBFS |
| 45 | extern void register_hugetlbfs_with_node(node_registration_func_t doregister, |
| 46 | node_registration_func_t unregister); |
| 47 | #endif |
| 48 | #else |
| 49 | static inline int register_one_node(int nid) |
| 50 | { |
| 51 | return 0; |
| 52 | } |
| 53 | static inline int unregister_one_node(int nid) |
| 54 | { |
| 55 | return 0; |
| 56 | } |
| 57 | static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) |
| 58 | { |
| 59 | return 0; |
| 60 | } |
| 61 | static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) |
| 62 | { |
| 63 | return 0; |
| 64 | } |
| 65 | static inline int register_mem_sect_under_node(struct memory_block *mem_blk, |
| 66 | int nid) |
| 67 | { |
| 68 | return 0; |
| 69 | } |
| 70 | static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
| 71 | unsigned long phys_index) |
| 72 | { |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static inline void register_hugetlbfs_with_node(node_registration_func_t reg, |
| 77 | node_registration_func_t unreg) |
| 78 | { |
| 79 | } |
| 80 | #endif |
| 81 | |
| 82 | #define to_node(device) container_of(device, struct node, dev) |
| 83 | |
| 84 | #endif /* _LINUX_NODE_H_ */ |