1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Author: Xiang Gao <gaoxiang@loongson.cn> 4 * Huacai Chen <chenhuacai@loongson.cn> 5 * 6 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 7 */ 8 #include <linux/init.h> 9 #include <linux/kernel.h> 10 #include <linux/mm.h> 11 #include <linux/mmzone.h> 12 #include <linux/export.h> 13 #include <linux/nodemask.h> 14 #include <linux/numa_memblks.h> 15 #include <linux/swap.h> 16 #include <linux/memblock.h> 17 #include <linux/pfn.h> 18 #include <linux/acpi.h> 19 #include <linux/efi.h> 20 #include <linux/irq.h> 21 #include <linux/pci.h> 22 #include <asm/bootinfo.h> 23 #include <asm/loongson.h> 24 #include <asm/numa.h> 25 #include <asm/page.h> 26 #include <asm/pgalloc.h> 27 #include <asm/sections.h> 28 #include <asm/time.h> 29 30 int numa_off; 31 cpumask_t cpus_on_node[MAX_NUMNODES]; 32 cpumask_t phys_cpus_on_node[MAX_NUMNODES]; 33 EXPORT_SYMBOL(cpus_on_node); 34 35 /* 36 * apicid, cpu, node mappings 37 */ 38 s16 __cpuid_to_node[CONFIG_NR_CPUS] = { 39 [0 ... CONFIG_NR_CPUS - 1] = NUMA_NO_NODE 40 }; 41 EXPORT_SYMBOL(__cpuid_to_node); 42 43 #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA 44 unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; 45 EXPORT_SYMBOL(__per_cpu_offset); 46 47 static int __init pcpu_cpu_to_node(int cpu) 48 { 49 return early_cpu_to_node(cpu); 50 } 51 52 static int __init pcpu_cpu_distance(unsigned int from, unsigned int to) 53 { 54 if (early_cpu_to_node(from) == early_cpu_to_node(to)) 55 return LOCAL_DISTANCE; 56 else 57 return REMOTE_DISTANCE; 58 } 59 60 void __init pcpu_populate_pte(unsigned long addr) 61 { 62 populate_kernel_pte(addr); 63 } 64 65 void __init setup_per_cpu_areas(void) 66 { 67 unsigned long delta; 68 unsigned int cpu; 69 int rc = -EINVAL; 70 71 if (pcpu_chosen_fc == PCPU_FC_AUTO) { 72 if (nr_node_ids >= 8) 73 pcpu_chosen_fc = PCPU_FC_PAGE; 74 else 75 pcpu_chosen_fc = PCPU_FC_EMBED; 76 } 77 78 /* 79 * Always reserve area for module percpu variables. That's 80 * what the legacy allocator did. 81 */ 82 if (pcpu_chosen_fc != PCPU_FC_PAGE) { 83 rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, 84 PERCPU_DYNAMIC_RESERVE, PMD_SIZE, 85 pcpu_cpu_distance, pcpu_cpu_to_node); 86 if (rc < 0) 87 pr_warn("%s allocator failed (%d), falling back to page size\n", 88 pcpu_fc_names[pcpu_chosen_fc], rc); 89 } 90 if (rc < 0) 91 rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, pcpu_cpu_to_node); 92 if (rc < 0) 93 panic("cannot initialize percpu area (err=%d)", rc); 94 95 delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; 96 for_each_possible_cpu(cpu) 97 __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; 98 } 99 #endif 100 101 /* 102 * Get nodeid by logical cpu number. 103 * __cpuid_to_node maps phyical cpu id to node, so we 104 * should use cpu_logical_map(cpu) to index it. 105 * 106 * This routine is only used in early phase during 107 * booting, after setup_per_cpu_areas calling and numa_node 108 * initialization, cpu_to_node will be used instead. 109 */ 110 int early_cpu_to_node(int cpu) 111 { 112 int physid = cpu_logical_map(cpu); 113 114 if (physid < 0) 115 return NUMA_NO_NODE; 116 117 return __cpuid_to_node[physid]; 118 } 119 120 void __init early_numa_add_cpu(int cpuid, s16 node) 121 { 122 int cpu = __cpu_number_map[cpuid]; 123 124 if (cpu < 0) 125 return; 126 127 cpumask_set_cpu(cpu, &cpus_on_node[node]); 128 cpumask_set_cpu(cpuid, &phys_cpus_on_node[node]); 129 } 130 131 void numa_add_cpu(unsigned int cpu) 132 { 133 int nid = cpu_to_node(cpu); 134 cpumask_set_cpu(cpu, &cpus_on_node[nid]); 135 } 136 137 void numa_remove_cpu(unsigned int cpu) 138 { 139 int nid = cpu_to_node(cpu); 140 cpumask_clear_cpu(cpu, &cpus_on_node[nid]); 141 } 142 143 static void __init node_mem_init(unsigned int node) 144 { 145 unsigned long start_pfn, end_pfn; 146 unsigned long node_addrspace_offset; 147 148 node_addrspace_offset = nid_to_addrbase(node); 149 pr_info("Node%d's addrspace_offset is 0x%lx\n", 150 node, node_addrspace_offset); 151 152 get_pfn_range_for_nid(node, &start_pfn, &end_pfn); 153 pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n", 154 node, start_pfn, end_pfn); 155 156 alloc_node_data(node); 157 } 158 159 #ifdef CONFIG_ACPI_NUMA 160 161 static unsigned long num_physpages; 162 163 static void __init info_node_memblock(void) 164 { 165 u32 mem_type; 166 u64 mem_end, mem_start, mem_size; 167 efi_memory_desc_t *md; 168 169 /* Parse memory information and activate */ 170 for_each_efi_memory_desc(md) { 171 mem_type = md->type; 172 mem_start = md->phys_addr; 173 mem_size = md->num_pages << EFI_PAGE_SHIFT; 174 mem_end = mem_start + mem_size; 175 176 switch (mem_type) { 177 case EFI_LOADER_CODE: 178 case EFI_LOADER_DATA: 179 case EFI_BOOT_SERVICES_CODE: 180 case EFI_BOOT_SERVICES_DATA: 181 case EFI_PERSISTENT_MEMORY: 182 case EFI_CONVENTIONAL_MEMORY: 183 num_physpages += (mem_size >> PAGE_SHIFT); 184 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", 185 (u32)pa_to_nid(mem_start), mem_type, mem_start, mem_size); 186 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", 187 mem_start >> PAGE_SHIFT, mem_end >> PAGE_SHIFT, num_physpages); 188 break; 189 case EFI_PAL_CODE: 190 case EFI_UNUSABLE_MEMORY: 191 case EFI_ACPI_RECLAIM_MEMORY: 192 num_physpages += (mem_size >> PAGE_SHIFT); 193 pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", 194 (u32)pa_to_nid(mem_start), mem_type, mem_start, mem_size); 195 pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", 196 mem_start >> PAGE_SHIFT, mem_end >> PAGE_SHIFT, num_physpages); 197 fallthrough; 198 case EFI_RESERVED_TYPE: 199 case EFI_RUNTIME_SERVICES_CODE: 200 case EFI_RUNTIME_SERVICES_DATA: 201 case EFI_MEMORY_MAPPED_IO: 202 case EFI_MEMORY_MAPPED_IO_PORT_SPACE: 203 pr_info("Resvd: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", 204 mem_type, mem_start, mem_size); 205 break; 206 } 207 } 208 } 209 210 /* 211 * fake_numa_init() - For Non-ACPI systems 212 * Return: 0 on success, -errno on failure. 213 */ 214 static int __init fake_numa_init(void) 215 { 216 phys_addr_t start = memblock_start_of_DRAM(); 217 phys_addr_t end = memblock_end_of_DRAM() - 1; 218 219 node_set(0, numa_nodes_parsed); 220 pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end); 221 222 return numa_add_memblk(0, start, end + 1); 223 } 224 225 int __init init_numa_memory(void) 226 { 227 int i; 228 int ret; 229 int node; 230 231 for (i = 0; i < NR_CPUS; i++) 232 set_cpuid_to_node(i, NUMA_NO_NODE); 233 234 /* Parse SRAT and SLIT if provided by firmware. */ 235 if (!acpi_disabled) 236 ret = numa_memblks_init(acpi_numa_init, false); 237 else 238 ret = numa_memblks_init(fake_numa_init, false); 239 240 if (ret < 0) 241 return ret; 242 243 info_node_memblock(); 244 if (!memblock_validate_numa_coverage(SZ_1M)) 245 return -EINVAL; 246 247 for_each_node_mask(node, node_possible_map) { 248 node_mem_init(node); 249 node_set_online(node); 250 } 251 max_pfn = PFN_DOWN(memblock_end_of_DRAM()); 252 max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn); 253 254 setup_nr_node_ids(); 255 loongson_sysconf.nr_nodes = nr_node_ids; 256 loongson_sysconf.cores_per_node = cpumask_weight(&phys_cpus_on_node[0]); 257 258 return 0; 259 } 260 261 #endif 262 263 int pcibus_to_node(struct pci_bus *bus) 264 { 265 return dev_to_node(&bus->dev); 266 } 267 EXPORT_SYMBOL(pcibus_to_node); 268