// SPDX-License-Identifier: GPL-2.0
/*
* Author : Xiang Gao < gaoxiang @ loongson . cn >
* Huacai Chen < chenhuacai @ loongson . cn >
*
* Copyright ( C ) 2020 - 2022 Loongson Technology Corporation Limited
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/export.h>
#include <linux/nodemask.h>
#include <linux/numa_memblks.h>
#include <linux/swap.h>
#include <linux/memblock.h>
#include <linux/pfn.h>
#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <asm /bootinfo.h>
#include <asm /loongson.h>
#include <asm /numa.h>
#include <asm /page.h>
#include <asm /pgalloc.h>
#include <asm /sections.h>
#include <asm /time.h>
int numa_off;
cpumask_t cpus_on_node[MAX_NUMNODES];
cpumask_t phys_cpus_on_node[MAX_NUMNODES];
EXPORT_SYMBOL(cpus_on_node);
/*
* apicid , cpu , node mappings
*/
s16 __cpuid_to_node[CONFIG_NR_CPUS] = {
[0 ... CONFIG_NR_CPUS - 1 ] = NUMA_NO_NODE
};
EXPORT_SYMBOL(__cpuid_to_node);
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);
static int __init pcpu_cpu_to_node(int cpu)
{
return early_cpu_to_node(cpu);
}
static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
{
if (early_cpu_to_node(from) == early_cpu_to_node(to))
return LOCAL_DISTANCE;
else
return REMOTE_DISTANCE;
}
void __init pcpu_populate_pte(unsigned long addr)
{
populate_kernel_pte(addr);
}
void __init setup_per_cpu_areas(void )
{
unsigned long delta;
unsigned int cpu;
int rc = -EINVAL;
if (pcpu_chosen_fc == PCPU_FC_AUTO) {
if (nr_node_ids >= 8 )
pcpu_chosen_fc = PCPU_FC_PAGE;
else
pcpu_chosen_fc = PCPU_FC_EMBED;
}
/*
* Always reserve area for module percpu variables . That ' s
* what the legacy allocator did .
*/
if (pcpu_chosen_fc != PCPU_FC_PAGE) {
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, PMD_SIZE,
pcpu_cpu_distance, pcpu_cpu_to_node);
if (rc < 0 )
pr_warn("%s allocator failed (%d), falling back to page size\n" ,
pcpu_fc_names[pcpu_chosen_fc], rc);
}
if (rc < 0 )
rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, pcpu_cpu_to_node);
if (rc < 0 )
panic("cannot initialize percpu area (err=%d)" , rc);
delta = (unsigned long )pcpu_base_addr - (unsigned long )__per_cpu_start;
for_each_possible_cpu(cpu)
__per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
}
#endif
/*
* Get nodeid by logical cpu number .
* _ _ cpuid_to_node maps phyical cpu id to node , so we
* should use cpu_logical_map ( cpu ) to index it .
*
* This routine is only used in early phase during
* booting , after setup_per_cpu_areas calling and numa_node
* initialization , cpu_to_node will be used instead .
*/
int early_cpu_to_node(int cpu)
{
int physid = cpu_logical_map(cpu);
if (physid < 0 )
return NUMA_NO_NODE;
return __cpuid_to_node[physid];
}
void __init early_numa_add_cpu(int cpuid, s16 node)
{
int cpu = __cpu_number_map[cpuid];
if (cpu < 0 )
return ;
cpumask_set_cpu(cpu, &cpus_on_node[node]);
cpumask_set_cpu(cpuid, &phys_cpus_on_node[node]);
}
void numa_add_cpu(unsigned int cpu)
{
int nid = cpu_to_node(cpu);
cpumask_set_cpu(cpu, &cpus_on_node[nid]);
}
void numa_remove_cpu(unsigned int cpu)
{
int nid = cpu_to_node(cpu);
cpumask_clear_cpu(cpu, &cpus_on_node[nid]);
}
static void __init node_mem_init(unsigned int node)
{
unsigned long start_pfn, end_pfn;
unsigned long node_addrspace_offset;
node_addrspace_offset = nid_to_addrbase(node);
pr_info("Node%d's addrspace_offset is 0x%lx\n" ,
node, node_addrspace_offset);
get_pfn_range_for_nid(node, &start_pfn, &end_pfn);
pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n" ,
node, start_pfn, end_pfn);
alloc_node_data(node);
}
#ifdef CONFIG_ACPI_NUMA
/*
* add_numamem_region
*
* Add a uasable memory region described by BIOS . The
* routine gets each intersection between BIOS ' s region
* and node ' s region , and adds them into node ' s memblock
* pool .
*
*/
static void __init add_numamem_region(u64 start, u64 end, u32 type)
{
u32 node = pa_to_nid(start);
u64 size = end - start;
static unsigned long num_physpages;
if (start >= end) {
pr_debug("Invalid region: %016llx-%016llx\n" , start, end);
return ;
}
num_physpages += (size >> PAGE_SHIFT);
pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n" ,
node, type, start, size);
pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n" ,
start >> PAGE_SHIFT, end >> PAGE_SHIFT, num_physpages);
memblock_set_node(start, size, &memblock.memory, node);
}
static void __init init_node_memblock(void )
{
u32 mem_type;
u64 mem_end, mem_start, mem_size;
efi_memory_desc_t *md;
/* Parse memory information and activate */
for_each_efi_memory_desc(md) {
mem_type = md->type;
mem_start = md->phys_addr;
mem_size = md->num_pages << EFI_PAGE_SHIFT;
mem_end = mem_start + mem_size;
switch (mem_type) {
case EFI_LOADER_CODE:
case EFI_LOADER_DATA:
case EFI_BOOT_SERVICES_CODE:
case EFI_BOOT_SERVICES_DATA:
case EFI_PERSISTENT_MEMORY:
case EFI_CONVENTIONAL_MEMORY:
add_numamem_region(mem_start, mem_end, mem_type);
break ;
case EFI_PAL_CODE:
case EFI_UNUSABLE_MEMORY:
case EFI_ACPI_RECLAIM_MEMORY:
add_numamem_region(mem_start, mem_end, mem_type);
fallthrough;
case EFI_RESERVED_TYPE:
case EFI_RUNTIME_SERVICES_CODE:
case EFI_RUNTIME_SERVICES_DATA:
case EFI_MEMORY_MAPPED_IO:
case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
pr_info("Resvd: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n" ,
mem_type, mem_start, mem_size);
break ;
}
}
}
/*
* fake_numa_init ( ) - For Non - ACPI systems
* Return : 0 on success , - errno on failure .
*/
static int __init fake_numa_init(void )
{
phys_addr_t start = memblock_start_of_DRAM();
phys_addr_t end = memblock_end_of_DRAM() - 1 ;
node_set(0 , numa_nodes_parsed);
pr_info("Faking a node at [mem %pap-%pap]\n" , &start, &end);
return numa_add_memblk(0 , start, end + 1 );
}
int __init init_numa_memory(void )
{
int i;
int ret;
int node;
for (i = 0 ; i < NR_CPUS; i++)
set_cpuid_to_node(i, NUMA_NO_NODE);
numa_reset_distance();
nodes_clear(numa_nodes_parsed);
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
WARN_ON(memblock_clear_hotplug(0 , PHYS_ADDR_MAX));
/* Parse SRAT and SLIT if provided by firmware. */
ret = acpi_disabled ? fake_numa_init() : acpi_numa_init();
if (ret < 0 )
return ret;
node_possible_map = numa_nodes_parsed;
if (WARN_ON(nodes_empty(node_possible_map)))
return -EINVAL;
init_node_memblock();
if (!memblock_validate_numa_coverage(SZ_1M))
return -EINVAL;
for_each_node_mask(node, node_possible_map) {
node_mem_init(node);
node_set_online(node);
}
max_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
setup_nr_node_ids();
loongson_sysconf.nr_nodes = nr_node_ids;
loongson_sysconf.cores_per_node = cpumask_weight(&phys_cpus_on_node[0 ]);
return 0 ;
}
#endif
int pcibus_to_node(struct pci_bus *bus)
{
return dev_to_node(&bus->dev);
}
EXPORT_SYMBOL(pcibus_to_node);
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