/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __LINUX_CPU_RMAP_H
#define __LINUX_CPU_RMAP_H



#include <linux/cpumask.h>
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/kref.h>


struct cpu_rmap {
	struct kref	refcount;
	u16		size, used;
	void		**obj;
	struct {
		u16	index;
		u16	dist;
	}		near[];
};
#define CPU_RMAP_DIST_INF 0xffff

extern struct cpu_rmap *alloc_cpu_rmap(unsigned int size, gfp_t flags);
extern int cpu_rmap_put(struct cpu_rmap *rmap);

extern int cpu_rmap_add(struct cpu_rmap *rmap, void *obj);
extern int cpu_rmap_update(struct cpu_rmap *rmap, u16 index,
			   const struct cpumask *affinity);

static inline u16 cpu_rmap_lookup_index(struct cpu_rmap *rmap, unsigned int cpu)
{
	return rmap->near[cpu].index;
}

static inline void *cpu_rmap_lookup_obj(struct cpu_rmap *rmap, unsigned int cpu)
{
	return rmap->obj[rmap->near[cpu].index];
}


static inline struct cpu_rmap *alloc_irq_cpu_rmap(unsigned int size)
{
	return alloc_cpu_rmap(size, GFP_KERNEL);
}
extern void free_irq_cpu_rmap(struct cpu_rmap *rmap);

extern int irq_cpu_rmap_add(struct cpu_rmap *rmap, int irq);

#endif 
