// SPDX-License-Identifier: GPL-2.0

#include <linux/debugfs.h>

#include <asm/apic.h>
#include <asm/processor.h>

#include "cpu.h"

static int cpu_debug_show(struct seq_file *m, void *p)
{
        unsigned long cpu = (unsigned long)m->private;
        struct cpuinfo_x86 *c = per_cpu_ptr(&cpu_info, cpu);

        seq_printf(m, "online:              %d\n", cpu_online(cpu));
        if (!c->initialized)
                return 0;

        seq_printf(m, "initial_apicid:      0x%x\n", c->topo.initial_apicid);
        seq_printf(m, "apicid:              0x%x\n", c->topo.apicid);
        seq_printf(m, "pkg_id:              %u\n", c->topo.pkg_id);
        seq_printf(m, "die_id:              %u\n", c->topo.die_id);
        seq_printf(m, "cu_id:               %u\n", c->topo.cu_id);
        seq_printf(m, "core_id:             %u\n", c->topo.core_id);
        seq_printf(m, "cpu_type:            %s\n", get_topology_cpu_type_name(c));
        seq_printf(m, "logical_pkg_id:      %u\n", c->topo.logical_pkg_id);
        seq_printf(m, "logical_die_id:      %u\n", c->topo.logical_die_id);
        seq_printf(m, "logical_core_id:     %u\n", c->topo.logical_core_id);
        seq_printf(m, "llc_id:              %u\n", c->topo.llc_id);
        seq_printf(m, "l2c_id:              %u\n", c->topo.l2c_id);
        seq_printf(m, "amd_node_id:         %u\n", c->topo.amd_node_id);
        seq_printf(m, "amd_nodes_per_pkg:   %u\n", topology_amd_nodes_per_pkg());
        seq_printf(m, "num_threads:         %u\n", __num_threads_per_package);
        seq_printf(m, "num_cores:           %u\n", __num_cores_per_package);
        seq_printf(m, "max_dies_per_pkg:    %u\n", __max_dies_per_package);
        seq_printf(m, "max_threads_per_core:%u\n", __max_threads_per_core);
        return 0;
}

static int cpu_debug_open(struct inode *inode, struct file *file)
{
        return single_open(file, cpu_debug_show, inode->i_private);
}

static const struct file_operations dfs_cpu_ops = {
        .open           = cpu_debug_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = single_release,
};

static int dom_debug_show(struct seq_file *m, void *p)
{
        static const char *domain_names[TOPO_MAX_DOMAIN] = {
                [TOPO_SMT_DOMAIN]       = "Thread",
                [TOPO_CORE_DOMAIN]      = "Core",
                [TOPO_MODULE_DOMAIN]    = "Module",
                [TOPO_TILE_DOMAIN]      = "Tile",
                [TOPO_DIE_DOMAIN]       = "Die",
                [TOPO_DIEGRP_DOMAIN]    = "DieGrp",
                [TOPO_PKG_DOMAIN]       = "Package",
        };
        unsigned int dom, nthreads = 1;

        for (dom = 0; dom < TOPO_MAX_DOMAIN; dom++) {
                nthreads *= x86_topo_system.dom_size[dom];
                seq_printf(m, "domain: %-10s shift: %u dom_size: %5u max_threads: %5u\n",
                           domain_names[dom], x86_topo_system.dom_shifts[dom],
                           x86_topo_system.dom_size[dom], nthreads);
        }
        return 0;
}

static int dom_debug_open(struct inode *inode, struct file *file)
{
        return single_open(file, dom_debug_show, inode->i_private);
}

static const struct file_operations dfs_dom_ops = {
        .open           = dom_debug_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = single_release,
};

static __init int cpu_init_debugfs(void)
{
        struct dentry *dir, *base = debugfs_create_dir("topo", arch_debugfs_dir);
        unsigned long id;
        char name[24];

        debugfs_create_file("domains", 0444, base, NULL, &dfs_dom_ops);

        dir = debugfs_create_dir("cpus", base);
        for_each_possible_cpu(id) {
                sprintf(name, "%lu", id);
                debugfs_create_file(name, 0444, dir, (void *)id, &dfs_cpu_ops);
        }
        return 0;
}
late_initcall(cpu_init_debugfs);