185 lines
4.7 KiB
C
185 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* include/linux/node.h - generic node definition
|
|
*
|
|
* This is mainly for topological representation. We define the
|
|
* basic 'struct node' here, which can be embedded in per-arch
|
|
* definitions of processors.
|
|
*
|
|
* Basic handling of the devices is done in drivers/base/node.c
|
|
* and system devices are handled in drivers/base/sys.c.
|
|
*
|
|
* Nodes are exported via driverfs in the class/node/devices/
|
|
* directory.
|
|
*/
|
|
#ifndef _LINUX_NODE_H_
|
|
#define _LINUX_NODE_H_
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/list.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
/**
|
|
* struct node_hmem_attrs - heterogeneous memory performance attributes
|
|
*
|
|
* @read_bandwidth: Read bandwidth in MB/s
|
|
* @write_bandwidth: Write bandwidth in MB/s
|
|
* @read_latency: Read latency in nanoseconds
|
|
* @write_latency: Write latency in nanoseconds
|
|
*/
|
|
struct node_hmem_attrs {
|
|
unsigned int read_bandwidth;
|
|
unsigned int write_bandwidth;
|
|
unsigned int read_latency;
|
|
unsigned int write_latency;
|
|
};
|
|
|
|
enum cache_indexing {
|
|
NODE_CACHE_DIRECT_MAP,
|
|
NODE_CACHE_INDEXED,
|
|
NODE_CACHE_OTHER,
|
|
};
|
|
|
|
enum cache_write_policy {
|
|
NODE_CACHE_WRITE_BACK,
|
|
NODE_CACHE_WRITE_THROUGH,
|
|
NODE_CACHE_WRITE_OTHER,
|
|
};
|
|
|
|
/**
|
|
* struct node_cache_attrs - system memory caching attributes
|
|
*
|
|
* @indexing: The ways memory blocks may be placed in cache
|
|
* @write_policy: Write back or write through policy
|
|
* @size: Total size of cache in bytes
|
|
* @line_size: Number of bytes fetched on a cache miss
|
|
* @level: The cache hierarchy level
|
|
*/
|
|
struct node_cache_attrs {
|
|
enum cache_indexing indexing;
|
|
enum cache_write_policy write_policy;
|
|
u64 size;
|
|
u16 line_size;
|
|
u8 level;
|
|
};
|
|
|
|
#ifdef CONFIG_HMEM_REPORTING
|
|
void node_add_cache(unsigned int nid, struct node_cache_attrs *cache_attrs);
|
|
void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs,
|
|
unsigned access);
|
|
#else
|
|
static inline void node_add_cache(unsigned int nid,
|
|
struct node_cache_attrs *cache_attrs)
|
|
{
|
|
}
|
|
|
|
static inline void node_set_perf_attrs(unsigned int nid,
|
|
struct node_hmem_attrs *hmem_attrs,
|
|
unsigned access)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
struct node {
|
|
struct device dev;
|
|
struct list_head access_list;
|
|
|
|
#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_HUGETLBFS)
|
|
struct work_struct node_work;
|
|
#endif
|
|
#ifdef CONFIG_HMEM_REPORTING
|
|
struct list_head cache_attrs;
|
|
struct device *cache_dev;
|
|
#endif
|
|
};
|
|
|
|
struct memory_block;
|
|
extern struct node *node_devices[];
|
|
typedef void (*node_registration_func_t)(struct node *);
|
|
|
|
#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_NUMA)
|
|
void link_mem_sections(int nid, unsigned long start_pfn,
|
|
unsigned long end_pfn,
|
|
enum meminit_context context);
|
|
#else
|
|
static inline void link_mem_sections(int nid, unsigned long start_pfn,
|
|
unsigned long end_pfn,
|
|
enum meminit_context context)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
extern void unregister_node(struct node *node);
|
|
#ifdef CONFIG_NUMA
|
|
/* Core of the node registration - only memory hotplug should use this */
|
|
extern int __register_one_node(int nid);
|
|
|
|
/* Registers an online node */
|
|
static inline int register_one_node(int nid)
|
|
{
|
|
int error = 0;
|
|
|
|
if (node_online(nid)) {
|
|
struct pglist_data *pgdat = NODE_DATA(nid);
|
|
unsigned long start_pfn = pgdat->node_start_pfn;
|
|
unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages;
|
|
|
|
error = __register_one_node(nid);
|
|
if (error)
|
|
return error;
|
|
/* link memory sections under this node */
|
|
link_mem_sections(nid, start_pfn, end_pfn, MEMINIT_EARLY);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
extern void unregister_one_node(int nid);
|
|
extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
|
|
extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
|
|
extern void unregister_memory_block_under_nodes(struct memory_block *mem_blk);
|
|
|
|
extern int register_memory_node_under_compute_node(unsigned int mem_nid,
|
|
unsigned int cpu_nid,
|
|
unsigned access);
|
|
|
|
#ifdef CONFIG_HUGETLBFS
|
|
extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
|
|
node_registration_func_t unregister);
|
|
#endif
|
|
#else
|
|
static inline int __register_one_node(int nid)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int register_one_node(int nid)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int unregister_one_node(int nid)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void unregister_memory_block_under_nodes(struct memory_block *mem_blk)
|
|
{
|
|
}
|
|
|
|
static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
|
|
node_registration_func_t unreg)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#define to_node(device) container_of(device, struct node, dev)
|
|
|
|
#endif /* _LINUX_NODE_H_ */
|