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
30int numa_off;
31cpumask_t cpus_on_node[MAX_NUMNODES];
32cpumask_t phys_cpus_on_node[MAX_NUMNODES];
33EXPORT_SYMBOL(cpus_on_node);
34
35/*
36 * apicid, cpu, node mappings
37 */
38s16 __cpuid_to_node[CONFIG_NR_CPUS] = {
39 [0 ... CONFIG_NR_CPUS - 1] = NUMA_NO_NODE
40};
41EXPORT_SYMBOL(__cpuid_to_node);
42
43#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
44unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
45EXPORT_SYMBOL(__per_cpu_offset);
46
47static int __init pcpu_cpu_to_node(int cpu)
48{
49 return early_cpu_to_node(cpu);
50}
51
52static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
53{
54 if (early_cpu_to_node(cpu: from) == early_cpu_to_node(cpu: to))
55 return LOCAL_DISTANCE;
56 else
57 return REMOTE_DISTANCE;
58}
59
60void __init pcpu_populate_pte(unsigned long addr)
61{
62 populate_kernel_pte(addr);
63}
64
65void __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 cpu_distance_fn: pcpu_cpu_distance, cpu_to_nd_fn: 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, cpu_to_nd_fn: pcpu_cpu_to_node);
92 if (rc < 0)
93 panic(fmt: "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 */
110int 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
120void __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, dstp: &cpus_on_node[node]);
128 cpumask_set_cpu(cpu: cpuid, dstp: &phys_cpus_on_node[node]);
129}
130
131void numa_add_cpu(unsigned int cpu)
132{
133 int nid = cpu_to_node(cpu);
134 cpumask_set_cpu(cpu, dstp: &cpus_on_node[nid]);
135}
136
137void numa_remove_cpu(unsigned int cpu)
138{
139 int nid = cpu_to_node(cpu);
140 cpumask_clear_cpu(cpu, dstp: &cpus_on_node[nid]);
141}
142
143static 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(nid: node, start_pfn: &start_pfn, end_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(nid: node);
157}
158
159#ifdef CONFIG_ACPI_NUMA
160
161static unsigned long num_physpages;
162
163static 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 */
214static 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(nodeid: 0, start, end: end + 1);
223}
224
225int __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(init_func: acpi_numa_init, memblock_force_top_down: false);
237 else
238 ret = numa_memblks_init(init_func: fake_numa_init, memblock_force_top_down: 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(nid: 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
263int pcibus_to_node(struct pci_bus *bus)
264{
265 return dev_to_node(dev: &bus->dev);
266}
267EXPORT_SYMBOL(pcibus_to_node);
268

source code of linux/arch/loongarch/kernel/numa.c