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d4b6f156 HC |
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/swap.h> | |
15 | #include <linux/memblock.h> | |
16 | #include <linux/pfn.h> | |
17 | #include <linux/acpi.h> | |
18 | #include <linux/efi.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/pci.h> | |
21 | #include <asm/bootinfo.h> | |
22 | #include <asm/loongson.h> | |
23 | #include <asm/numa.h> | |
24 | #include <asm/page.h> | |
25 | #include <asm/pgalloc.h> | |
26 | #include <asm/sections.h> | |
27 | #include <asm/time.h> | |
28 | ||
29 | int numa_off; | |
30 | struct pglist_data *node_data[MAX_NUMNODES]; | |
31 | unsigned char node_distances[MAX_NUMNODES][MAX_NUMNODES]; | |
32 | ||
33 | EXPORT_SYMBOL(node_data); | |
34 | EXPORT_SYMBOL(node_distances); | |
35 | ||
36 | static struct numa_meminfo numa_meminfo; | |
37 | cpumask_t cpus_on_node[MAX_NUMNODES]; | |
38 | cpumask_t phys_cpus_on_node[MAX_NUMNODES]; | |
39 | EXPORT_SYMBOL(cpus_on_node); | |
40 | ||
41 | /* | |
42 | * apicid, cpu, node mappings | |
43 | */ | |
44 | s16 __cpuid_to_node[CONFIG_NR_CPUS] = { | |
45 | [0 ... CONFIG_NR_CPUS - 1] = NUMA_NO_NODE | |
46 | }; | |
47 | EXPORT_SYMBOL(__cpuid_to_node); | |
48 | ||
49 | nodemask_t numa_nodes_parsed __initdata; | |
50 | ||
51 | #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA | |
52 | unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; | |
53 | EXPORT_SYMBOL(__per_cpu_offset); | |
54 | ||
55 | static int __init pcpu_cpu_to_node(int cpu) | |
56 | { | |
57 | return early_cpu_to_node(cpu); | |
58 | } | |
59 | ||
60 | static int __init pcpu_cpu_distance(unsigned int from, unsigned int to) | |
61 | { | |
62 | if (early_cpu_to_node(from) == early_cpu_to_node(to)) | |
63 | return LOCAL_DISTANCE; | |
64 | else | |
65 | return REMOTE_DISTANCE; | |
66 | } | |
67 | ||
68 | void __init pcpu_populate_pte(unsigned long addr) | |
69 | { | |
70 | pgd_t *pgd = pgd_offset_k(addr); | |
71 | p4d_t *p4d = p4d_offset(pgd, addr); | |
72 | pud_t *pud; | |
73 | pmd_t *pmd; | |
74 | ||
75 | if (p4d_none(*p4d)) { | |
76 | pud_t *new; | |
77 | ||
78 | new = memblock_alloc(PAGE_SIZE, PAGE_SIZE); | |
79 | pgd_populate(&init_mm, pgd, new); | |
80 | #ifndef __PAGETABLE_PUD_FOLDED | |
81 | pud_init((unsigned long)new, (unsigned long)invalid_pmd_table); | |
82 | #endif | |
83 | } | |
84 | ||
85 | pud = pud_offset(p4d, addr); | |
86 | if (pud_none(*pud)) { | |
87 | pmd_t *new; | |
88 | ||
89 | new = memblock_alloc(PAGE_SIZE, PAGE_SIZE); | |
90 | pud_populate(&init_mm, pud, new); | |
91 | #ifndef __PAGETABLE_PMD_FOLDED | |
92 | pmd_init((unsigned long)new, (unsigned long)invalid_pte_table); | |
93 | #endif | |
94 | } | |
95 | ||
96 | pmd = pmd_offset(pud, addr); | |
97 | if (!pmd_present(*pmd)) { | |
98 | pte_t *new; | |
99 | ||
100 | new = memblock_alloc(PAGE_SIZE, PAGE_SIZE); | |
101 | pmd_populate_kernel(&init_mm, pmd, new); | |
102 | } | |
103 | } | |
104 | ||
105 | void __init setup_per_cpu_areas(void) | |
106 | { | |
107 | unsigned long delta; | |
108 | unsigned int cpu; | |
109 | int rc = -EINVAL; | |
110 | ||
111 | if (pcpu_chosen_fc == PCPU_FC_AUTO) { | |
112 | if (nr_node_ids >= 8) | |
113 | pcpu_chosen_fc = PCPU_FC_PAGE; | |
114 | else | |
115 | pcpu_chosen_fc = PCPU_FC_EMBED; | |
116 | } | |
117 | ||
118 | /* | |
119 | * Always reserve area for module percpu variables. That's | |
120 | * what the legacy allocator did. | |
121 | */ | |
122 | if (pcpu_chosen_fc != PCPU_FC_PAGE) { | |
123 | rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, | |
124 | PERCPU_DYNAMIC_RESERVE, PMD_SIZE, | |
125 | pcpu_cpu_distance, pcpu_cpu_to_node); | |
126 | if (rc < 0) | |
127 | pr_warn("%s allocator failed (%d), falling back to page size\n", | |
128 | pcpu_fc_names[pcpu_chosen_fc], rc); | |
129 | } | |
130 | if (rc < 0) | |
131 | rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, pcpu_cpu_to_node); | |
132 | if (rc < 0) | |
133 | panic("cannot initialize percpu area (err=%d)", rc); | |
134 | ||
135 | delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; | |
136 | for_each_possible_cpu(cpu) | |
137 | __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; | |
138 | } | |
139 | #endif | |
140 | ||
141 | /* | |
142 | * Get nodeid by logical cpu number. | |
143 | * __cpuid_to_node maps phyical cpu id to node, so we | |
144 | * should use cpu_logical_map(cpu) to index it. | |
145 | * | |
146 | * This routine is only used in early phase during | |
147 | * booting, after setup_per_cpu_areas calling and numa_node | |
148 | * initialization, cpu_to_node will be used instead. | |
149 | */ | |
150 | int early_cpu_to_node(int cpu) | |
151 | { | |
152 | int physid = cpu_logical_map(cpu); | |
153 | ||
154 | if (physid < 0) | |
155 | return NUMA_NO_NODE; | |
156 | ||
157 | return __cpuid_to_node[physid]; | |
158 | } | |
159 | ||
160 | void __init early_numa_add_cpu(int cpuid, s16 node) | |
161 | { | |
162 | int cpu = __cpu_number_map[cpuid]; | |
163 | ||
164 | if (cpu < 0) | |
165 | return; | |
166 | ||
167 | cpumask_set_cpu(cpu, &cpus_on_node[node]); | |
168 | cpumask_set_cpu(cpuid, &phys_cpus_on_node[node]); | |
169 | } | |
170 | ||
171 | void numa_add_cpu(unsigned int cpu) | |
172 | { | |
173 | int nid = cpu_to_node(cpu); | |
174 | cpumask_set_cpu(cpu, &cpus_on_node[nid]); | |
175 | } | |
176 | ||
177 | void numa_remove_cpu(unsigned int cpu) | |
178 | { | |
179 | int nid = cpu_to_node(cpu); | |
180 | cpumask_clear_cpu(cpu, &cpus_on_node[nid]); | |
181 | } | |
182 | ||
183 | static int __init numa_add_memblk_to(int nid, u64 start, u64 end, | |
184 | struct numa_meminfo *mi) | |
185 | { | |
186 | /* ignore zero length blks */ | |
187 | if (start == end) | |
188 | return 0; | |
189 | ||
190 | /* whine about and ignore invalid blks */ | |
191 | if (start > end || nid < 0 || nid >= MAX_NUMNODES) { | |
192 | pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n", | |
193 | nid, start, end - 1); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | if (mi->nr_blks >= NR_NODE_MEMBLKS) { | |
198 | pr_err("NUMA: too many memblk ranges\n"); | |
199 | return -EINVAL; | |
200 | } | |
201 | ||
202 | mi->blk[mi->nr_blks].start = PFN_ALIGN(start); | |
203 | mi->blk[mi->nr_blks].end = PFN_ALIGN(end - PAGE_SIZE + 1); | |
204 | mi->blk[mi->nr_blks].nid = nid; | |
205 | mi->nr_blks++; | |
206 | return 0; | |
207 | } | |
208 | ||
209 | /** | |
210 | * numa_add_memblk - Add one numa_memblk to numa_meminfo | |
211 | * @nid: NUMA node ID of the new memblk | |
212 | * @start: Start address of the new memblk | |
213 | * @end: End address of the new memblk | |
214 | * | |
215 | * Add a new memblk to the default numa_meminfo. | |
216 | * | |
217 | * RETURNS: | |
218 | * 0 on success, -errno on failure. | |
219 | */ | |
220 | int __init numa_add_memblk(int nid, u64 start, u64 end) | |
221 | { | |
222 | return numa_add_memblk_to(nid, start, end, &numa_meminfo); | |
223 | } | |
224 | ||
225 | static void __init alloc_node_data(int nid) | |
226 | { | |
227 | void *nd; | |
228 | unsigned long nd_pa; | |
229 | size_t nd_sz = roundup(sizeof(pg_data_t), PAGE_SIZE); | |
230 | ||
231 | nd_pa = memblock_phys_alloc_try_nid(nd_sz, SMP_CACHE_BYTES, nid); | |
232 | if (!nd_pa) { | |
233 | pr_err("Cannot find %zu Byte for node_data (initial node: %d)\n", nd_sz, nid); | |
234 | return; | |
235 | } | |
236 | ||
237 | nd = __va(nd_pa); | |
238 | ||
239 | node_data[nid] = nd; | |
240 | memset(nd, 0, sizeof(pg_data_t)); | |
241 | } | |
242 | ||
243 | static void __init node_mem_init(unsigned int node) | |
244 | { | |
245 | unsigned long start_pfn, end_pfn; | |
246 | unsigned long node_addrspace_offset; | |
247 | ||
248 | node_addrspace_offset = nid_to_addrbase(node); | |
249 | pr_info("Node%d's addrspace_offset is 0x%lx\n", | |
250 | node, node_addrspace_offset); | |
251 | ||
252 | get_pfn_range_for_nid(node, &start_pfn, &end_pfn); | |
253 | pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n", | |
254 | node, start_pfn, end_pfn); | |
255 | ||
256 | alloc_node_data(node); | |
257 | } | |
258 | ||
259 | #ifdef CONFIG_ACPI_NUMA | |
260 | ||
261 | /* | |
262 | * Sanity check to catch more bad NUMA configurations (they are amazingly | |
263 | * common). Make sure the nodes cover all memory. | |
264 | */ | |
265 | static bool __init numa_meminfo_cover_memory(const struct numa_meminfo *mi) | |
266 | { | |
267 | int i; | |
268 | u64 numaram, biosram; | |
269 | ||
270 | numaram = 0; | |
271 | for (i = 0; i < mi->nr_blks; i++) { | |
272 | u64 s = mi->blk[i].start >> PAGE_SHIFT; | |
273 | u64 e = mi->blk[i].end >> PAGE_SHIFT; | |
274 | ||
275 | numaram += e - s; | |
276 | numaram -= __absent_pages_in_range(mi->blk[i].nid, s, e); | |
277 | if ((s64)numaram < 0) | |
278 | numaram = 0; | |
279 | } | |
280 | max_pfn = max_low_pfn; | |
281 | biosram = max_pfn - absent_pages_in_range(0, max_pfn); | |
282 | ||
283 | BUG_ON((s64)(biosram - numaram) >= (1 << (20 - PAGE_SHIFT))); | |
284 | return true; | |
285 | } | |
286 | ||
287 | static void __init add_node_intersection(u32 node, u64 start, u64 size, u32 type) | |
288 | { | |
289 | static unsigned long num_physpages; | |
290 | ||
291 | num_physpages += (size >> PAGE_SHIFT); | |
292 | pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", | |
293 | node, type, start, size); | |
294 | pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", | |
295 | start >> PAGE_SHIFT, (start + size) >> PAGE_SHIFT, num_physpages); | |
296 | memblock_set_node(start, size, &memblock.memory, node); | |
297 | } | |
298 | ||
299 | /* | |
300 | * add_numamem_region | |
301 | * | |
302 | * Add a uasable memory region described by BIOS. The | |
303 | * routine gets each intersection between BIOS's region | |
304 | * and node's region, and adds them into node's memblock | |
305 | * pool. | |
306 | * | |
307 | */ | |
308 | static void __init add_numamem_region(u64 start, u64 end, u32 type) | |
309 | { | |
310 | u32 i; | |
311 | u64 ofs = start; | |
312 | ||
313 | if (start >= end) { | |
314 | pr_debug("Invalid region: %016llx-%016llx\n", start, end); | |
315 | return; | |
316 | } | |
317 | ||
318 | for (i = 0; i < numa_meminfo.nr_blks; i++) { | |
319 | struct numa_memblk *mb = &numa_meminfo.blk[i]; | |
320 | ||
321 | if (ofs > mb->end) | |
322 | continue; | |
323 | ||
324 | if (end > mb->end) { | |
325 | add_node_intersection(mb->nid, ofs, mb->end - ofs, type); | |
326 | ofs = mb->end; | |
327 | } else { | |
328 | add_node_intersection(mb->nid, ofs, end - ofs, type); | |
329 | break; | |
330 | } | |
331 | } | |
332 | } | |
333 | ||
334 | static void __init init_node_memblock(void) | |
335 | { | |
336 | u32 mem_type; | |
337 | u64 mem_end, mem_start, mem_size; | |
338 | efi_memory_desc_t *md; | |
339 | ||
340 | /* Parse memory information and activate */ | |
341 | for_each_efi_memory_desc(md) { | |
342 | mem_type = md->type; | |
343 | mem_start = md->phys_addr; | |
344 | mem_size = md->num_pages << EFI_PAGE_SHIFT; | |
345 | mem_end = mem_start + mem_size; | |
346 | ||
347 | switch (mem_type) { | |
348 | case EFI_LOADER_CODE: | |
349 | case EFI_LOADER_DATA: | |
350 | case EFI_BOOT_SERVICES_CODE: | |
351 | case EFI_BOOT_SERVICES_DATA: | |
352 | case EFI_PERSISTENT_MEMORY: | |
353 | case EFI_CONVENTIONAL_MEMORY: | |
354 | add_numamem_region(mem_start, mem_end, mem_type); | |
355 | break; | |
356 | case EFI_PAL_CODE: | |
357 | case EFI_UNUSABLE_MEMORY: | |
358 | case EFI_ACPI_RECLAIM_MEMORY: | |
359 | add_numamem_region(mem_start, mem_end, mem_type); | |
360 | fallthrough; | |
361 | case EFI_RESERVED_TYPE: | |
362 | case EFI_RUNTIME_SERVICES_CODE: | |
363 | case EFI_RUNTIME_SERVICES_DATA: | |
364 | case EFI_MEMORY_MAPPED_IO: | |
365 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
366 | pr_info("Resvd: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx Bytes\n", | |
367 | mem_type, mem_start, mem_size); | |
368 | break; | |
369 | } | |
370 | } | |
371 | } | |
372 | ||
373 | static void __init numa_default_distance(void) | |
374 | { | |
375 | int row, col; | |
376 | ||
377 | for (row = 0; row < MAX_NUMNODES; row++) | |
378 | for (col = 0; col < MAX_NUMNODES; col++) { | |
379 | if (col == row) | |
380 | node_distances[row][col] = LOCAL_DISTANCE; | |
381 | else | |
382 | /* We assume that one node per package here! | |
383 | * | |
384 | * A SLIT should be used for multiple nodes | |
385 | * per package to override default setting. | |
386 | */ | |
387 | node_distances[row][col] = REMOTE_DISTANCE; | |
388 | } | |
389 | } | |
390 | ||
391 | int __init init_numa_memory(void) | |
392 | { | |
393 | int i; | |
394 | int ret; | |
395 | int node; | |
396 | ||
397 | for (i = 0; i < NR_CPUS; i++) | |
398 | set_cpuid_to_node(i, NUMA_NO_NODE); | |
399 | ||
400 | numa_default_distance(); | |
401 | nodes_clear(numa_nodes_parsed); | |
402 | nodes_clear(node_possible_map); | |
403 | nodes_clear(node_online_map); | |
404 | memset(&numa_meminfo, 0, sizeof(numa_meminfo)); | |
405 | ||
406 | /* Parse SRAT and SLIT if provided by firmware. */ | |
407 | ret = acpi_numa_init(); | |
408 | if (ret < 0) | |
409 | return ret; | |
410 | ||
411 | node_possible_map = numa_nodes_parsed; | |
412 | if (WARN_ON(nodes_empty(node_possible_map))) | |
413 | return -EINVAL; | |
414 | ||
415 | init_node_memblock(); | |
416 | if (numa_meminfo_cover_memory(&numa_meminfo) == false) | |
417 | return -EINVAL; | |
418 | ||
419 | for_each_node_mask(node, node_possible_map) { | |
420 | node_mem_init(node); | |
421 | node_set_online(node); | |
422 | } | |
423 | max_low_pfn = PHYS_PFN(memblock_end_of_DRAM()); | |
424 | ||
425 | setup_nr_node_ids(); | |
426 | loongson_sysconf.nr_nodes = nr_node_ids; | |
427 | loongson_sysconf.cores_per_node = cpumask_weight(&phys_cpus_on_node[0]); | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
d4b6f156 HC |
432 | #endif |
433 | ||
434 | void __init paging_init(void) | |
435 | { | |
436 | unsigned int node; | |
437 | unsigned long zones_size[MAX_NR_ZONES] = {0, }; | |
438 | ||
439 | for_each_online_node(node) { | |
440 | unsigned long start_pfn, end_pfn; | |
441 | ||
442 | get_pfn_range_for_nid(node, &start_pfn, &end_pfn); | |
443 | ||
444 | if (end_pfn > max_low_pfn) | |
445 | max_low_pfn = end_pfn; | |
446 | } | |
447 | #ifdef CONFIG_ZONE_DMA32 | |
448 | zones_size[ZONE_DMA32] = MAX_DMA32_PFN; | |
449 | #endif | |
450 | zones_size[ZONE_NORMAL] = max_low_pfn; | |
451 | free_area_init(zones_size); | |
452 | } | |
453 | ||
454 | void __init mem_init(void) | |
455 | { | |
456 | high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT); | |
457 | memblock_free_all(); | |
458 | setup_zero_pages(); /* This comes from node 0 */ | |
459 | } | |
460 | ||
461 | int pcibus_to_node(struct pci_bus *bus) | |
462 | { | |
463 | return dev_to_node(&bus->dev); | |
464 | } | |
465 | EXPORT_SYMBOL(pcibus_to_node); |