/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_TOPOLOGY_H
#define _ASM_POWERPC_TOPOLOGY_H
#ifdef __KERNEL__


struct device;
struct device_node;
struct drmem_lmb;

#ifdef CONFIG_NUMA

/*
 * If zone_reclaim_mode is enabled, a RECLAIM_DISTANCE of 10 will mean that
 * all zones on all nodes will be eligible for zone_reclaim().
 */
#define RECLAIM_DISTANCE 10

#include <asm/mmzone.h>

#define cpumask_of_node(node) ((node) == -1 ?                           \
                               cpu_all_mask :                           \
                               node_to_cpumask_map[node])

struct pci_bus;
#ifdef CONFIG_PCI
extern int pcibus_to_node(struct pci_bus *bus);
#else
static inline int pcibus_to_node(struct pci_bus *bus)
{
        return -1;
}
#endif

#define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
                                 cpu_all_mask :                         \
                                 cpumask_of_node(pcibus_to_node(bus)))

int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc);
extern int __node_distance(int, int);
#define node_distance(a, b) __node_distance(a, b)

extern void __init dump_numa_cpu_topology(void);

extern int sysfs_add_device_to_node(struct device *dev, int nid);
extern void sysfs_remove_device_from_node(struct device *dev, int nid);

static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node)
{
        numa_cpu_lookup_table[cpu] = node;
}

static inline int early_cpu_to_node(int cpu)
{
        int nid;

        nid = numa_cpu_lookup_table[cpu];

        /*
         * Fall back to node 0 if nid is unset (it should be, except bugs).
         * This allows callers to safely do NODE_DATA(early_cpu_to_node(cpu)).
         */
        return (nid < 0) ? 0 : nid;
}

int of_drconf_to_nid_single(struct drmem_lmb *lmb);
void update_numa_distance(struct device_node *node);

extern void map_cpu_to_node(int cpu, int node);
#ifdef CONFIG_HOTPLUG_CPU
extern void unmap_cpu_from_node(unsigned long cpu);
#endif /* CONFIG_HOTPLUG_CPU */

#else

static inline int early_cpu_to_node(int cpu) { return 0; }

static inline void dump_numa_cpu_topology(void) {}

static inline int sysfs_add_device_to_node(struct device *dev, int nid)
{
        return 0;
}

static inline void sysfs_remove_device_from_node(struct device *dev,
                                                int nid)
{
}

static inline void update_numa_cpu_lookup_table(unsigned int cpu, int node) {}

static inline int cpu_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
{
        return 0;
}

static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
{
        return first_online_node;
}

static inline void update_numa_distance(struct device_node *node) {}

#ifdef CONFIG_SMP
static inline void map_cpu_to_node(int cpu, int node) {}
#ifdef CONFIG_HOTPLUG_CPU
static inline void unmap_cpu_from_node(unsigned long cpu) {}
#endif /* CONFIG_HOTPLUG_CPU */
#endif /* CONFIG_SMP */

#endif /* CONFIG_NUMA */

#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
void find_and_update_cpu_nid(int cpu);
extern int cpu_to_coregroup_id(int cpu);
#else
static inline void find_and_update_cpu_nid(int cpu) {}
static inline int cpu_to_coregroup_id(int cpu)
{
#ifdef CONFIG_SMP
        return cpu_to_core_id(cpu);
#else
        return 0;
#endif
}

#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */

#include <asm-generic/topology.h>

#ifdef CONFIG_SMP
#include <asm/cputable.h>

struct cpumask *cpu_coregroup_mask(int cpu);
const struct cpumask *cpu_die_mask(int cpu);
int cpu_die_id(int cpu);

#ifdef CONFIG_PPC64
#include <asm/smp.h>

#define topology_physical_package_id(cpu)       (cpu_to_chip_id(cpu))
#define topology_sibling_cpumask(cpu)           (per_cpu(cpu_sibling_map, cpu))
#define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
#define topology_core_id(cpu)                   (cpu_to_core_id(cpu))
#define topology_die_id(cpu)                    (cpu_die_id(cpu))
#define topology_die_cpumask(cpu)               (cpu_die_mask(cpu))

#endif
#endif

#ifdef CONFIG_HOTPLUG_SMT
#include <linux/cpu_smt.h>
#include <linux/cpumask.h>
#include <asm/cputhreads.h>

static inline bool topology_is_primary_thread(unsigned int cpu)
{
        return cpu == cpu_first_thread_sibling(cpu);
}
#define topology_is_primary_thread topology_is_primary_thread

static inline bool topology_smt_thread_allowed(unsigned int cpu)
{
        return cpu_thread_in_core(cpu) < cpu_smt_num_threads;
}

#define topology_is_core_online topology_is_core_online
static inline bool topology_is_core_online(unsigned int cpu)
{
        int i, first_cpu = cpu_first_thread_sibling(cpu);

        for (i = first_cpu; i < first_cpu + threads_per_core; ++i) {
                if (cpu_online(i))
                        return true;
        }
        return false;
}
#endif

#endif /* __KERNEL__ */
#endif  /* _ASM_POWERPC_TOPOLOGY_H */