Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Procedures for maintaining information about logical memory blocks. |
| 3 | * |
| 4 | * Peter Bergner, IBM Corp. June 2001. |
| 5 | * Copyright (C) 2001 Peter Bergner. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 14 | #include <linux/slab.h> |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 15 | #include <linux/init.h> |
| 16 | #include <linux/bitops.h> |
Benjamin Herrenschmidt | 449e8df | 2010-07-06 15:39:07 -0700 | [diff] [blame] | 17 | #include <linux/poison.h> |
Benjamin Herrenschmidt | c196f76 | 2010-07-06 15:39:16 -0700 | [diff] [blame] | 18 | #include <linux/pfn.h> |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 19 | #include <linux/debugfs.h> |
| 20 | #include <linux/seq_file.h> |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 21 | #include <linux/memblock.h> |
| 22 | |
Christoph Hellwig | c4c5ad6 | 2016-07-28 15:48:06 -0700 | [diff] [blame] | 23 | #include <asm/sections.h> |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 24 | #include <linux/io.h> |
| 25 | |
| 26 | #include "internal.h" |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 27 | |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 28 | static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; |
| 29 | static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 30 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 31 | static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; |
| 32 | #endif |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 33 | |
| 34 | struct memblock memblock __initdata_memblock = { |
| 35 | .memory.regions = memblock_memory_init_regions, |
| 36 | .memory.cnt = 1, /* empty dummy entry */ |
| 37 | .memory.max = INIT_MEMBLOCK_REGIONS, |
| 38 | |
| 39 | .reserved.regions = memblock_reserved_init_regions, |
| 40 | .reserved.cnt = 1, /* empty dummy entry */ |
| 41 | .reserved.max = INIT_MEMBLOCK_REGIONS, |
| 42 | |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 43 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 44 | .physmem.regions = memblock_physmem_init_regions, |
| 45 | .physmem.cnt = 1, /* empty dummy entry */ |
| 46 | .physmem.max = INIT_PHYSMEM_REGIONS, |
| 47 | #endif |
| 48 | |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 49 | .bottom_up = false, |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 50 | .current_limit = MEMBLOCK_ALLOC_ANYWHERE, |
| 51 | }; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 52 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 53 | int memblock_debug __initdata_memblock; |
Tang Chen | 55ac590 | 2014-01-21 15:49:35 -0800 | [diff] [blame] | 54 | #ifdef CONFIG_MOVABLE_NODE |
| 55 | bool movable_node_enabled __initdata_memblock = false; |
| 56 | #endif |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 57 | static bool system_has_some_mirror __initdata_memblock = false; |
Tejun Heo | 1aadc05 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 58 | static int memblock_can_resize __initdata_memblock; |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 59 | static int memblock_memory_in_slab __initdata_memblock = 0; |
| 60 | static int memblock_reserved_in_slab __initdata_memblock = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 61 | |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 62 | ulong __init_memblock choose_memblock_flags(void) |
| 63 | { |
| 64 | return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; |
| 65 | } |
| 66 | |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 67 | /* inline so we don't get a warning when pr_debug is compiled out */ |
Raghavendra D Prabhu | c223311 | 2012-10-08 16:33:55 -0700 | [diff] [blame] | 68 | static __init_memblock const char * |
| 69 | memblock_type_name(struct memblock_type *type) |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 70 | { |
| 71 | if (type == &memblock.memory) |
| 72 | return "memory"; |
| 73 | else if (type == &memblock.reserved) |
| 74 | return "reserved"; |
| 75 | else |
| 76 | return "unknown"; |
| 77 | } |
| 78 | |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 79 | /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ |
| 80 | static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) |
| 81 | { |
| 82 | return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); |
| 83 | } |
| 84 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 85 | /* |
| 86 | * Address comparison utilities |
| 87 | */ |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 88 | static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, |
Benjamin Herrenschmidt | 2898cc4 | 2010-08-04 13:34:42 +1000 | [diff] [blame] | 89 | phys_addr_t base2, phys_addr_t size2) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 90 | { |
| 91 | return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); |
| 92 | } |
| 93 | |
Tang Chen | 95cf82e | 2015-09-08 15:02:03 -0700 | [diff] [blame] | 94 | bool __init_memblock memblock_overlaps_region(struct memblock_type *type, |
H Hartley Sweeten | 2d7d3eb | 2011-10-31 17:09:15 -0700 | [diff] [blame] | 95 | phys_addr_t base, phys_addr_t size) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 96 | { |
| 97 | unsigned long i; |
| 98 | |
Alexander Kuleshov | f14516f | 2016-01-14 15:20:39 -0800 | [diff] [blame] | 99 | for (i = 0; i < type->cnt; i++) |
| 100 | if (memblock_addrs_overlap(base, size, type->regions[i].base, |
| 101 | type->regions[i].size)) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 102 | break; |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 103 | return i < type->cnt; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 104 | } |
| 105 | |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 106 | /* |
| 107 | * __memblock_find_range_bottom_up - find free area utility in bottom-up |
| 108 | * @start: start of candidate range |
| 109 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} |
| 110 | * @size: size of free area to find |
| 111 | * @align: alignment of free area to find |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 112 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 113 | * @flags: pick from blocks based on memory attributes |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 114 | * |
| 115 | * Utility called from memblock_find_in_range_node(), find free area bottom-up. |
| 116 | * |
| 117 | * RETURNS: |
| 118 | * Found address on success, 0 on failure. |
| 119 | */ |
| 120 | static phys_addr_t __init_memblock |
| 121 | __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 122 | phys_addr_t size, phys_addr_t align, int nid, |
| 123 | ulong flags) |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 124 | { |
| 125 | phys_addr_t this_start, this_end, cand; |
| 126 | u64 i; |
| 127 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 128 | for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 129 | this_start = clamp(this_start, start, end); |
| 130 | this_end = clamp(this_end, start, end); |
| 131 | |
| 132 | cand = round_up(this_start, align); |
| 133 | if (cand < this_end && this_end - cand >= size) |
| 134 | return cand; |
| 135 | } |
| 136 | |
| 137 | return 0; |
| 138 | } |
| 139 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 140 | /** |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 141 | * __memblock_find_range_top_down - find free area utility, in top-down |
| 142 | * @start: start of candidate range |
| 143 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} |
| 144 | * @size: size of free area to find |
| 145 | * @align: alignment of free area to find |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 146 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 147 | * @flags: pick from blocks based on memory attributes |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 148 | * |
| 149 | * Utility called from memblock_find_in_range_node(), find free area top-down. |
| 150 | * |
| 151 | * RETURNS: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 152 | * Found address on success, 0 on failure. |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 153 | */ |
| 154 | static phys_addr_t __init_memblock |
| 155 | __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 156 | phys_addr_t size, phys_addr_t align, int nid, |
| 157 | ulong flags) |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 158 | { |
| 159 | phys_addr_t this_start, this_end, cand; |
| 160 | u64 i; |
| 161 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 162 | for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, |
| 163 | NULL) { |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 164 | this_start = clamp(this_start, start, end); |
| 165 | this_end = clamp(this_end, start, end); |
| 166 | |
| 167 | if (this_end < size) |
| 168 | continue; |
| 169 | |
| 170 | cand = round_down(this_end - size, align); |
| 171 | if (cand >= this_start) |
| 172 | return cand; |
| 173 | } |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | /** |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 179 | * memblock_find_in_range_node - find free area in given range and node |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 180 | * @size: size of free area to find |
| 181 | * @align: alignment of free area to find |
Grygorii Strashko | 87029ee | 2014-01-21 15:50:14 -0800 | [diff] [blame] | 182 | * @start: start of candidate range |
| 183 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 184 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 185 | * @flags: pick from blocks based on memory attributes |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 186 | * |
| 187 | * Find @size free area aligned to @align in the specified range and node. |
| 188 | * |
| 189 | * RETURNS: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 190 | * Found address on success, 0 on failure. |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 191 | */ |
Grygorii Strashko | 87029ee | 2014-01-21 15:50:14 -0800 | [diff] [blame] | 192 | phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, |
| 193 | phys_addr_t align, phys_addr_t start, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 194 | phys_addr_t end, int nid, ulong flags) |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 195 | { |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 196 | /* pump up @end */ |
| 197 | if (end == MEMBLOCK_ALLOC_ACCESSIBLE) |
| 198 | end = memblock.current_limit; |
| 199 | |
| 200 | /* avoid allocating the first page */ |
| 201 | start = max_t(phys_addr_t, start, PAGE_SIZE); |
| 202 | end = max(start, end); |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 203 | |
Roman Gushchin | 3fcc1c3 | 2021-02-04 18:32:36 -0800 | [diff] [blame] | 204 | if (memblock_bottom_up()) |
| 205 | return __memblock_find_range_bottom_up(start, end, size, align, |
| 206 | nid, flags); |
| 207 | else |
| 208 | return __memblock_find_range_top_down(start, end, size, align, |
| 209 | nid, flags); |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 210 | } |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 211 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 212 | /** |
| 213 | * memblock_find_in_range - find free area in given range |
| 214 | * @start: start of candidate range |
| 215 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} |
| 216 | * @size: size of free area to find |
| 217 | * @align: alignment of free area to find |
| 218 | * |
| 219 | * Find @size free area aligned to @align in the specified range. |
| 220 | * |
| 221 | * RETURNS: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 222 | * Found address on success, 0 on failure. |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 223 | */ |
| 224 | phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, |
| 225 | phys_addr_t end, phys_addr_t size, |
| 226 | phys_addr_t align) |
| 227 | { |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 228 | phys_addr_t ret; |
| 229 | ulong flags = choose_memblock_flags(); |
| 230 | |
| 231 | again: |
| 232 | ret = memblock_find_in_range_node(size, align, start, end, |
| 233 | NUMA_NO_NODE, flags); |
| 234 | |
| 235 | if (!ret && (flags & MEMBLOCK_MIRROR)) { |
| 236 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", |
| 237 | &size); |
| 238 | flags &= ~MEMBLOCK_MIRROR; |
| 239 | goto again; |
| 240 | } |
| 241 | |
| 242 | return ret; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 243 | } |
| 244 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 245 | static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 246 | { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 247 | type->total_size -= type->regions[r].size; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 248 | memmove(&type->regions[r], &type->regions[r + 1], |
| 249 | (type->cnt - (r + 1)) * sizeof(type->regions[r])); |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 250 | type->cnt--; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 251 | |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 252 | /* Special case for empty arrays */ |
| 253 | if (type->cnt == 0) { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 254 | WARN_ON(type->total_size != 0); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 255 | type->cnt = 1; |
| 256 | type->regions[0].base = 0; |
| 257 | type->regions[0].size = 0; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 258 | type->regions[0].flags = 0; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 259 | memblock_set_region_node(&type->regions[0], MAX_NUMNODES); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 260 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 261 | } |
| 262 | |
Philipp Hachtmann | 354f17e | 2014-01-23 15:53:24 -0800 | [diff] [blame] | 263 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
Pavel Tatashin | 87395ee | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 264 | /** |
| 265 | * Discard memory and reserved arrays if they were allocated |
| 266 | */ |
| 267 | void __init memblock_discard(void) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 268 | { |
Pavel Tatashin | 87395ee | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 269 | phys_addr_t addr, size; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 270 | |
Pavel Tatashin | 87395ee | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 271 | if (memblock.reserved.regions != memblock_reserved_init_regions) { |
| 272 | addr = __pa(memblock.reserved.regions); |
| 273 | size = PAGE_ALIGN(sizeof(struct memblock_region) * |
| 274 | memblock.reserved.max); |
Miaohe Lin | 670d6e5 | 2022-02-17 22:53:27 +0800 | [diff] [blame] | 275 | if (memblock_reserved_in_slab) |
| 276 | kfree(memblock.reserved.regions); |
| 277 | else |
| 278 | __memblock_free_late(addr, size); |
Pavel Tatashin | 87395ee | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 279 | } |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 280 | |
Pavel Tatashin | 9d26332 | 2017-08-25 15:55:46 -0700 | [diff] [blame] | 281 | if (memblock.memory.regions != memblock_memory_init_regions) { |
Pavel Tatashin | 87395ee | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 282 | addr = __pa(memblock.memory.regions); |
| 283 | size = PAGE_ALIGN(sizeof(struct memblock_region) * |
| 284 | memblock.memory.max); |
Miaohe Lin | 670d6e5 | 2022-02-17 22:53:27 +0800 | [diff] [blame] | 285 | if (memblock_memory_in_slab) |
| 286 | kfree(memblock.memory.regions); |
| 287 | else |
| 288 | __memblock_free_late(addr, size); |
Pavel Tatashin | 87395ee | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 289 | } |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 290 | } |
Philipp Hachtmann | 5e270e2 | 2014-01-23 15:53:11 -0800 | [diff] [blame] | 291 | #endif |
| 292 | |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 293 | /** |
| 294 | * memblock_double_array - double the size of the memblock regions array |
| 295 | * @type: memblock type of the regions array being doubled |
| 296 | * @new_area_start: starting address of memory range to avoid overlap with |
| 297 | * @new_area_size: size of memory range to avoid overlap with |
| 298 | * |
| 299 | * Double the size of the @type regions array. If memblock is being used to |
| 300 | * allocate memory for a new reserved regions array and there is a previously |
| 301 | * allocated memory range [@new_area_start,@new_area_start+@new_area_size] |
| 302 | * waiting to be reserved, ensure the memory used by the new array does |
| 303 | * not overlap. |
| 304 | * |
| 305 | * RETURNS: |
| 306 | * 0 on success, -1 on failure. |
| 307 | */ |
| 308 | static int __init_memblock memblock_double_array(struct memblock_type *type, |
| 309 | phys_addr_t new_area_start, |
| 310 | phys_addr_t new_area_size) |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 311 | { |
| 312 | struct memblock_region *new_array, *old_array; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 313 | phys_addr_t old_alloc_size, new_alloc_size; |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 314 | phys_addr_t old_size, new_size, addr; |
| 315 | int use_slab = slab_is_available(); |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 316 | int *in_slab; |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 317 | |
| 318 | /* We don't allow resizing until we know about the reserved regions |
| 319 | * of memory that aren't suitable for allocation |
| 320 | */ |
| 321 | if (!memblock_can_resize) |
| 322 | return -1; |
| 323 | |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 324 | /* Calculate new doubled size */ |
| 325 | old_size = type->max * sizeof(struct memblock_region); |
| 326 | new_size = old_size << 1; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 327 | /* |
| 328 | * We need to allocated new one align to PAGE_SIZE, |
| 329 | * so we can free them completely later. |
| 330 | */ |
| 331 | old_alloc_size = PAGE_ALIGN(old_size); |
| 332 | new_alloc_size = PAGE_ALIGN(new_size); |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 333 | |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 334 | /* Retrieve the slab flag */ |
| 335 | if (type == &memblock.memory) |
| 336 | in_slab = &memblock_memory_in_slab; |
| 337 | else |
| 338 | in_slab = &memblock_reserved_in_slab; |
| 339 | |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 340 | /* Try to find some space for it. |
| 341 | * |
| 342 | * WARNING: We assume that either slab_is_available() and we use it or |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 343 | * we use MEMBLOCK for allocations. That means that this is unsafe to |
| 344 | * use when bootmem is currently active (unless bootmem itself is |
| 345 | * implemented on top of MEMBLOCK which isn't the case yet) |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 346 | * |
| 347 | * This should however not be an issue for now, as we currently only |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 348 | * call into MEMBLOCK while it's still active, or much later when slab |
| 349 | * is active for memory hotplug operations |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 350 | */ |
| 351 | if (use_slab) { |
| 352 | new_array = kmalloc(new_size, GFP_KERNEL); |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 353 | addr = new_array ? __pa(new_array) : 0; |
Gavin Shan | 4e2f077 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 354 | } else { |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 355 | /* only exclude range when trying to double reserved.regions */ |
| 356 | if (type != &memblock.reserved) |
| 357 | new_area_start = new_area_size = 0; |
| 358 | |
| 359 | addr = memblock_find_in_range(new_area_start + new_area_size, |
| 360 | memblock.current_limit, |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 361 | new_alloc_size, PAGE_SIZE); |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 362 | if (!addr && new_area_size) |
| 363 | addr = memblock_find_in_range(0, |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 364 | min(new_area_start, memblock.current_limit), |
| 365 | new_alloc_size, PAGE_SIZE); |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 366 | |
Sachin Kamat | 1567486 | 2012-09-04 13:55:05 +0530 | [diff] [blame] | 367 | new_array = addr ? __va(addr) : NULL; |
Gavin Shan | 4e2f077 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 368 | } |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 369 | if (!addr) { |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 370 | pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", |
| 371 | memblock_type_name(type), type->max, type->max * 2); |
| 372 | return -1; |
| 373 | } |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 374 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 375 | memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", |
| 376 | memblock_type_name(type), type->max * 2, (u64)addr, |
| 377 | (u64)addr + new_size - 1); |
Yinghai Lu | ea9e437 | 2010-07-28 15:13:22 +1000 | [diff] [blame] | 378 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 379 | /* |
| 380 | * Found space, we now need to move the array over before we add the |
| 381 | * reserved region since it may be our reserved array itself that is |
| 382 | * full. |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 383 | */ |
| 384 | memcpy(new_array, type->regions, old_size); |
| 385 | memset(new_array + type->max, 0, old_size); |
| 386 | old_array = type->regions; |
| 387 | type->regions = new_array; |
| 388 | type->max <<= 1; |
| 389 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 390 | /* Free old array. We needn't free it if the array is the static one */ |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 391 | if (*in_slab) |
| 392 | kfree(old_array); |
| 393 | else if (old_array != memblock_memory_init_regions && |
| 394 | old_array != memblock_reserved_init_regions) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 395 | memblock_free(__pa(old_array), old_alloc_size); |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 396 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 397 | /* |
| 398 | * Reserve the new array if that comes from the memblock. Otherwise, we |
| 399 | * needn't do it |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 400 | */ |
| 401 | if (!use_slab) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 402 | BUG_ON(memblock_reserve(addr, new_alloc_size)); |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 403 | |
| 404 | /* Update slab flag */ |
| 405 | *in_slab = use_slab; |
| 406 | |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 407 | return 0; |
| 408 | } |
| 409 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 410 | /** |
| 411 | * memblock_merge_regions - merge neighboring compatible regions |
| 412 | * @type: memblock type to scan |
| 413 | * |
| 414 | * Scan @type and merge neighboring compatible regions. |
| 415 | */ |
| 416 | static void __init_memblock memblock_merge_regions(struct memblock_type *type) |
| 417 | { |
| 418 | int i = 0; |
| 419 | |
| 420 | /* cnt never goes below 1 */ |
| 421 | while (i < type->cnt - 1) { |
| 422 | struct memblock_region *this = &type->regions[i]; |
| 423 | struct memblock_region *next = &type->regions[i + 1]; |
| 424 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 425 | if (this->base + this->size != next->base || |
| 426 | memblock_get_region_node(this) != |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 427 | memblock_get_region_node(next) || |
| 428 | this->flags != next->flags) { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 429 | BUG_ON(this->base + this->size > next->base); |
| 430 | i++; |
| 431 | continue; |
| 432 | } |
| 433 | |
| 434 | this->size += next->size; |
Lin Feng | c0232ae | 2013-01-11 14:31:44 -0800 | [diff] [blame] | 435 | /* move forward from next + 1, index of which is i + 2 */ |
| 436 | memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 437 | type->cnt--; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | /** |
| 442 | * memblock_insert_region - insert new memblock region |
Tang Chen | 209ff86 | 2013-04-29 15:08:41 -0700 | [diff] [blame] | 443 | * @type: memblock type to insert into |
| 444 | * @idx: index for the insertion point |
| 445 | * @base: base address of the new region |
| 446 | * @size: size of the new region |
| 447 | * @nid: node id of the new region |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 448 | * @flags: flags of the new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 449 | * |
| 450 | * Insert new memblock region [@base,@base+@size) into @type at @idx. |
Alexander Kuleshov | 412d000 | 2016-08-04 15:31:46 -0700 | [diff] [blame] | 451 | * @type must already have extra room to accommodate the new region. |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 452 | */ |
| 453 | static void __init_memblock memblock_insert_region(struct memblock_type *type, |
| 454 | int idx, phys_addr_t base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 455 | phys_addr_t size, |
| 456 | int nid, unsigned long flags) |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 457 | { |
| 458 | struct memblock_region *rgn = &type->regions[idx]; |
| 459 | |
| 460 | BUG_ON(type->cnt >= type->max); |
| 461 | memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); |
| 462 | rgn->base = base; |
| 463 | rgn->size = size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 464 | rgn->flags = flags; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 465 | memblock_set_region_node(rgn, nid); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 466 | type->cnt++; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 467 | type->total_size += size; |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 471 | * memblock_add_range - add new memblock region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 472 | * @type: memblock type to add new region into |
| 473 | * @base: base address of the new region |
| 474 | * @size: size of the new region |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 475 | * @nid: nid of the new region |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 476 | * @flags: flags of the new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 477 | * |
| 478 | * Add new memblock region [@base,@base+@size) into @type. The new region |
| 479 | * is allowed to overlap with existing ones - overlaps don't affect already |
| 480 | * existing regions. @type is guaranteed to be minimal (all neighbouring |
| 481 | * compatible regions are merged) after the addition. |
| 482 | * |
| 483 | * RETURNS: |
| 484 | * 0 on success, -errno on failure. |
| 485 | */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 486 | int __init_memblock memblock_add_range(struct memblock_type *type, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 487 | phys_addr_t base, phys_addr_t size, |
| 488 | int nid, unsigned long flags) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 489 | { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 490 | bool insert = false; |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 491 | phys_addr_t obase = base; |
| 492 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 493 | int idx, nr_new; |
| 494 | struct memblock_region *rgn; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 495 | |
Tejun Heo | b3dc627 | 2012-04-20 08:31:34 -0700 | [diff] [blame] | 496 | if (!size) |
| 497 | return 0; |
| 498 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 499 | /* special case for empty array */ |
| 500 | if (type->regions[0].size == 0) { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 501 | WARN_ON(type->cnt != 1 || type->total_size); |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 502 | type->regions[0].base = base; |
| 503 | type->regions[0].size = size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 504 | type->regions[0].flags = flags; |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 505 | memblock_set_region_node(&type->regions[0], nid); |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 506 | type->total_size = size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 507 | return 0; |
| 508 | } |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 509 | repeat: |
| 510 | /* |
| 511 | * The following is executed twice. Once with %false @insert and |
| 512 | * then with %true. The first counts the number of regions needed |
Alexander Kuleshov | 412d000 | 2016-08-04 15:31:46 -0700 | [diff] [blame] | 513 | * to accommodate the new area. The second actually inserts them. |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 514 | */ |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 515 | base = obase; |
| 516 | nr_new = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 517 | |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 518 | for_each_memblock_type(type, rgn) { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 519 | phys_addr_t rbase = rgn->base; |
| 520 | phys_addr_t rend = rbase + rgn->size; |
| 521 | |
| 522 | if (rbase >= end) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 523 | break; |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 524 | if (rend <= base) |
| 525 | continue; |
| 526 | /* |
| 527 | * @rgn overlaps. If it separates the lower part of new |
| 528 | * area, insert that portion. |
| 529 | */ |
| 530 | if (rbase > base) { |
Wei Yang | c0a2949 | 2015-09-04 15:47:38 -0700 | [diff] [blame] | 531 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 532 | WARN_ON(nid != memblock_get_region_node(rgn)); |
| 533 | #endif |
Wei Yang | 4fcab5f | 2015-09-08 14:59:53 -0700 | [diff] [blame] | 534 | WARN_ON(flags != rgn->flags); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 535 | nr_new++; |
| 536 | if (insert) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 537 | memblock_insert_region(type, idx++, base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 538 | rbase - base, nid, |
| 539 | flags); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 540 | } |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 541 | /* area below @rend is dealt with, forget about it */ |
| 542 | base = min(rend, end); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 543 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 544 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 545 | /* insert the remaining portion */ |
| 546 | if (base < end) { |
| 547 | nr_new++; |
| 548 | if (insert) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 549 | memblock_insert_region(type, idx, base, end - base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 550 | nid, flags); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 551 | } |
| 552 | |
nimisolo | ef3cc4d | 2016-07-26 15:24:56 -0700 | [diff] [blame] | 553 | if (!nr_new) |
| 554 | return 0; |
| 555 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 556 | /* |
| 557 | * If this was the first round, resize array and repeat for actual |
| 558 | * insertions; otherwise, merge and return. |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 559 | */ |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 560 | if (!insert) { |
| 561 | while (type->cnt + nr_new > type->max) |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 562 | if (memblock_double_array(type, obase, size) < 0) |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 563 | return -ENOMEM; |
| 564 | insert = true; |
| 565 | goto repeat; |
| 566 | } else { |
| 567 | memblock_merge_regions(type); |
| 568 | return 0; |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 569 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 570 | } |
| 571 | |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 572 | int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, |
| 573 | int nid) |
| 574 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 575 | return memblock_add_range(&memblock.memory, base, size, nid, 0); |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 576 | } |
| 577 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 578 | int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) |
Alexander Kuleshov | 6a4055b | 2015-04-15 16:14:44 -0700 | [diff] [blame] | 579 | { |
Alexander Kuleshov | 6a4055b | 2015-04-15 16:14:44 -0700 | [diff] [blame] | 580 | memblock_dbg("memblock_add: [%#016llx-%#016llx] flags %#02lx %pF\n", |
| 581 | (unsigned long long)base, |
| 582 | (unsigned long long)base + size - 1, |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 583 | 0UL, (void *)_RET_IP_); |
Alexander Kuleshov | 6a4055b | 2015-04-15 16:14:44 -0700 | [diff] [blame] | 584 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 585 | return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 586 | } |
| 587 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 588 | /** |
| 589 | * memblock_isolate_range - isolate given range into disjoint memblocks |
| 590 | * @type: memblock type to isolate range for |
| 591 | * @base: base of range to isolate |
| 592 | * @size: size of range to isolate |
| 593 | * @start_rgn: out parameter for the start of isolated region |
| 594 | * @end_rgn: out parameter for the end of isolated region |
| 595 | * |
| 596 | * Walk @type and ensure that regions don't cross the boundaries defined by |
| 597 | * [@base,@base+@size). Crossing regions are split at the boundaries, |
| 598 | * which may create at most two more regions. The index of the first |
| 599 | * region inside the range is returned in *@start_rgn and end in *@end_rgn. |
| 600 | * |
| 601 | * RETURNS: |
| 602 | * 0 on success, -errno on failure. |
| 603 | */ |
| 604 | static int __init_memblock memblock_isolate_range(struct memblock_type *type, |
| 605 | phys_addr_t base, phys_addr_t size, |
| 606 | int *start_rgn, int *end_rgn) |
| 607 | { |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 608 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 609 | int idx; |
| 610 | struct memblock_region *rgn; |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 611 | |
| 612 | *start_rgn = *end_rgn = 0; |
| 613 | |
Tejun Heo | b3dc627 | 2012-04-20 08:31:34 -0700 | [diff] [blame] | 614 | if (!size) |
| 615 | return 0; |
| 616 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 617 | /* we'll create at most two more regions */ |
| 618 | while (type->cnt + 2 > type->max) |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 619 | if (memblock_double_array(type, base, size) < 0) |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 620 | return -ENOMEM; |
| 621 | |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 622 | for_each_memblock_type(type, rgn) { |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 623 | phys_addr_t rbase = rgn->base; |
| 624 | phys_addr_t rend = rbase + rgn->size; |
| 625 | |
| 626 | if (rbase >= end) |
| 627 | break; |
| 628 | if (rend <= base) |
| 629 | continue; |
| 630 | |
| 631 | if (rbase < base) { |
| 632 | /* |
| 633 | * @rgn intersects from below. Split and continue |
| 634 | * to process the next region - the new top half. |
| 635 | */ |
| 636 | rgn->base = base; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 637 | rgn->size -= base - rbase; |
| 638 | type->total_size -= base - rbase; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 639 | memblock_insert_region(type, idx, rbase, base - rbase, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 640 | memblock_get_region_node(rgn), |
| 641 | rgn->flags); |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 642 | } else if (rend > end) { |
| 643 | /* |
| 644 | * @rgn intersects from above. Split and redo the |
| 645 | * current region - the new bottom half. |
| 646 | */ |
| 647 | rgn->base = end; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 648 | rgn->size -= end - rbase; |
| 649 | type->total_size -= end - rbase; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 650 | memblock_insert_region(type, idx--, rbase, end - rbase, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 651 | memblock_get_region_node(rgn), |
| 652 | rgn->flags); |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 653 | } else { |
| 654 | /* @rgn is fully contained, record it */ |
| 655 | if (!*end_rgn) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 656 | *start_rgn = idx; |
| 657 | *end_rgn = idx + 1; |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 658 | } |
| 659 | } |
| 660 | |
| 661 | return 0; |
| 662 | } |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 663 | |
Alexander Kuleshov | 35bd16a | 2015-11-05 18:47:00 -0800 | [diff] [blame] | 664 | static int __init_memblock memblock_remove_range(struct memblock_type *type, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 665 | phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 666 | { |
Tejun Heo | 7193618 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 667 | int start_rgn, end_rgn; |
| 668 | int i, ret; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 669 | |
Tejun Heo | 7193618 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 670 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 671 | if (ret) |
| 672 | return ret; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 673 | |
Tejun Heo | 7193618 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 674 | for (i = end_rgn - 1; i >= start_rgn; i--) |
| 675 | memblock_remove_region(type, i); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 676 | return 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 677 | } |
| 678 | |
Tejun Heo | 581adcb | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 679 | int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 680 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 681 | return memblock_remove_range(&memblock.memory, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 682 | } |
| 683 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 684 | |
Tejun Heo | 581adcb | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 685 | int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 686 | { |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 687 | memblock_dbg(" memblock_free: [%#016llx-%#016llx] %pF\n", |
H. Peter Anvin | a150439 | 2011-07-14 11:57:10 -0700 | [diff] [blame] | 688 | (unsigned long long)base, |
Grygorii Strashko | 931d13f | 2014-01-21 15:49:17 -0800 | [diff] [blame] | 689 | (unsigned long long)base + size - 1, |
H. Peter Anvin | a150439 | 2011-07-14 11:57:10 -0700 | [diff] [blame] | 690 | (void *)_RET_IP_); |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 691 | |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 692 | kmemleak_free_part_phys(base, size); |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 693 | return memblock_remove_range(&memblock.reserved, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 694 | } |
| 695 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 696 | int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 697 | { |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 698 | memblock_dbg("memblock_reserve: [%#016llx-%#016llx] flags %#02lx %pF\n", |
H. Peter Anvin | a150439 | 2011-07-14 11:57:10 -0700 | [diff] [blame] | 699 | (unsigned long long)base, |
Grygorii Strashko | 931d13f | 2014-01-21 15:49:17 -0800 | [diff] [blame] | 700 | (unsigned long long)base + size - 1, |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 701 | 0UL, (void *)_RET_IP_); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 702 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 703 | return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 704 | } |
| 705 | |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 706 | /** |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 707 | * |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 708 | * This function isolates region [@base, @base + @size), and sets/clears flag |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 709 | * |
Alexander Kuleshov | c115393 | 2015-09-08 15:04:02 -0700 | [diff] [blame] | 710 | * Return 0 on success, -errno on failure. |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 711 | */ |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 712 | static int __init_memblock memblock_setclr_flag(phys_addr_t base, |
| 713 | phys_addr_t size, int set, int flag) |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 714 | { |
| 715 | struct memblock_type *type = &memblock.memory; |
| 716 | int i, ret, start_rgn, end_rgn; |
| 717 | |
| 718 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 719 | if (ret) |
| 720 | return ret; |
| 721 | |
| 722 | for (i = start_rgn; i < end_rgn; i++) |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 723 | if (set) |
| 724 | memblock_set_region_flags(&type->regions[i], flag); |
| 725 | else |
| 726 | memblock_clear_region_flags(&type->regions[i], flag); |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 727 | |
| 728 | memblock_merge_regions(type); |
| 729 | return 0; |
| 730 | } |
| 731 | |
| 732 | /** |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 733 | * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. |
| 734 | * @base: the base phys addr of the region |
| 735 | * @size: the size of the region |
| 736 | * |
Alexander Kuleshov | c115393 | 2015-09-08 15:04:02 -0700 | [diff] [blame] | 737 | * Return 0 on success, -errno on failure. |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 738 | */ |
| 739 | int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) |
| 740 | { |
| 741 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); |
| 742 | } |
| 743 | |
| 744 | /** |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 745 | * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. |
| 746 | * @base: the base phys addr of the region |
| 747 | * @size: the size of the region |
| 748 | * |
Alexander Kuleshov | c115393 | 2015-09-08 15:04:02 -0700 | [diff] [blame] | 749 | * Return 0 on success, -errno on failure. |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 750 | */ |
| 751 | int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) |
| 752 | { |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 753 | return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 754 | } |
| 755 | |
| 756 | /** |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 757 | * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. |
| 758 | * @base: the base phys addr of the region |
| 759 | * @size: the size of the region |
| 760 | * |
Alexander Kuleshov | c115393 | 2015-09-08 15:04:02 -0700 | [diff] [blame] | 761 | * Return 0 on success, -errno on failure. |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 762 | */ |
| 763 | int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) |
| 764 | { |
| 765 | system_has_some_mirror = true; |
| 766 | |
| 767 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); |
| 768 | } |
| 769 | |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 770 | /** |
| 771 | * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. |
| 772 | * @base: the base phys addr of the region |
| 773 | * @size: the size of the region |
| 774 | * |
| 775 | * Return 0 on success, -errno on failure. |
| 776 | */ |
| 777 | int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) |
| 778 | { |
| 779 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); |
| 780 | } |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 781 | |
| 782 | /** |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 783 | * __next_reserved_mem_region - next function for for_each_reserved_region() |
| 784 | * @idx: pointer to u64 loop variable |
| 785 | * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL |
| 786 | * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL |
| 787 | * |
| 788 | * Iterate over all reserved memory regions. |
| 789 | */ |
| 790 | void __init_memblock __next_reserved_mem_region(u64 *idx, |
| 791 | phys_addr_t *out_start, |
| 792 | phys_addr_t *out_end) |
| 793 | { |
Alexander Kuleshov | 567d117 | 2015-09-08 15:03:33 -0700 | [diff] [blame] | 794 | struct memblock_type *type = &memblock.reserved; |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 795 | |
Richard Leitner | cd33a76 | 2016-05-20 16:58:33 -0700 | [diff] [blame] | 796 | if (*idx < type->cnt) { |
Alexander Kuleshov | 567d117 | 2015-09-08 15:03:33 -0700 | [diff] [blame] | 797 | struct memblock_region *r = &type->regions[*idx]; |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 798 | phys_addr_t base = r->base; |
| 799 | phys_addr_t size = r->size; |
| 800 | |
| 801 | if (out_start) |
| 802 | *out_start = base; |
| 803 | if (out_end) |
| 804 | *out_end = base + size - 1; |
| 805 | |
| 806 | *idx += 1; |
| 807 | return; |
| 808 | } |
| 809 | |
| 810 | /* signal end of iteration */ |
| 811 | *idx = ULLONG_MAX; |
| 812 | } |
| 813 | |
| 814 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 815 | * __next__mem_range - next function for for_each_free_mem_range() etc. |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 816 | * @idx: pointer to u64 loop variable |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 817 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 818 | * @flags: pick from blocks based on memory attributes |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 819 | * @type_a: pointer to memblock_type from where the range is taken |
| 820 | * @type_b: pointer to memblock_type which excludes memory from being taken |
Wanpeng Li | dad7557 | 2012-06-20 12:53:01 -0700 | [diff] [blame] | 821 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 822 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 823 | * @out_nid: ptr to int for nid of the range, can be %NULL |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 824 | * |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 825 | * Find the first area from *@idx which matches @nid, fill the out |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 826 | * parameters, and update *@idx for the next iteration. The lower 32bit of |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 827 | * *@idx contains index into type_a and the upper 32bit indexes the |
| 828 | * areas before each region in type_b. For example, if type_b regions |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 829 | * look like the following, |
| 830 | * |
| 831 | * 0:[0-16), 1:[32-48), 2:[128-130) |
| 832 | * |
| 833 | * The upper 32bit indexes the following regions. |
| 834 | * |
| 835 | * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) |
| 836 | * |
| 837 | * As both region arrays are sorted, the function advances the two indices |
| 838 | * in lockstep and returns each intersection. |
| 839 | */ |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 840 | void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 841 | struct memblock_type *type_a, |
| 842 | struct memblock_type *type_b, |
| 843 | phys_addr_t *out_start, |
| 844 | phys_addr_t *out_end, int *out_nid) |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 845 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 846 | int idx_a = *idx & 0xffffffff; |
| 847 | int idx_b = *idx >> 32; |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 848 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 849 | if (WARN_ONCE(nid == MAX_NUMNODES, |
| 850 | "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 851 | nid = NUMA_NO_NODE; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 852 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 853 | for (; idx_a < type_a->cnt; idx_a++) { |
| 854 | struct memblock_region *m = &type_a->regions[idx_a]; |
| 855 | |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 856 | phys_addr_t m_start = m->base; |
| 857 | phys_addr_t m_end = m->base + m->size; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 858 | int m_nid = memblock_get_region_node(m); |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 859 | |
| 860 | /* only memory regions are associated with nodes, check it */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 861 | if (nid != NUMA_NO_NODE && nid != m_nid) |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 862 | continue; |
| 863 | |
Xishi Qiu | 0a313a9 | 2014-09-09 14:50:46 -0700 | [diff] [blame] | 864 | /* skip hotpluggable memory regions if needed */ |
| 865 | if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) |
| 866 | continue; |
| 867 | |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 868 | /* if we want mirror memory skip non-mirror memory regions */ |
| 869 | if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) |
| 870 | continue; |
| 871 | |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 872 | /* skip nomap memory unless we were asked for it explicitly */ |
| 873 | if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) |
| 874 | continue; |
| 875 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 876 | if (!type_b) { |
| 877 | if (out_start) |
| 878 | *out_start = m_start; |
| 879 | if (out_end) |
| 880 | *out_end = m_end; |
| 881 | if (out_nid) |
| 882 | *out_nid = m_nid; |
| 883 | idx_a++; |
| 884 | *idx = (u32)idx_a | (u64)idx_b << 32; |
| 885 | return; |
| 886 | } |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 887 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 888 | /* scan areas before each reservation */ |
| 889 | for (; idx_b < type_b->cnt + 1; idx_b++) { |
| 890 | struct memblock_region *r; |
| 891 | phys_addr_t r_start; |
| 892 | phys_addr_t r_end; |
| 893 | |
| 894 | r = &type_b->regions[idx_b]; |
| 895 | r_start = idx_b ? r[-1].base + r[-1].size : 0; |
| 896 | r_end = idx_b < type_b->cnt ? |
| 897 | r->base : ULLONG_MAX; |
| 898 | |
| 899 | /* |
| 900 | * if idx_b advanced past idx_a, |
| 901 | * break out to advance idx_a |
| 902 | */ |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 903 | if (r_start >= m_end) |
| 904 | break; |
| 905 | /* if the two regions intersect, we're done */ |
| 906 | if (m_start < r_end) { |
| 907 | if (out_start) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 908 | *out_start = |
| 909 | max(m_start, r_start); |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 910 | if (out_end) |
| 911 | *out_end = min(m_end, r_end); |
| 912 | if (out_nid) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 913 | *out_nid = m_nid; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 914 | /* |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 915 | * The region which ends first is |
| 916 | * advanced for the next iteration. |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 917 | */ |
| 918 | if (m_end <= r_end) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 919 | idx_a++; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 920 | else |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 921 | idx_b++; |
| 922 | *idx = (u32)idx_a | (u64)idx_b << 32; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 923 | return; |
| 924 | } |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | /* signal end of iteration */ |
| 929 | *idx = ULLONG_MAX; |
| 930 | } |
| 931 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 932 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 933 | * __next_mem_range_rev - generic next function for for_each_*_range_rev() |
| 934 | * |
| 935 | * Finds the next range from type_a which is not marked as unsuitable |
| 936 | * in type_b. |
| 937 | * |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 938 | * @idx: pointer to u64 loop variable |
Alexander Kuleshov | ad5ea8c | 2015-09-08 15:04:22 -0700 | [diff] [blame] | 939 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 940 | * @flags: pick from blocks based on memory attributes |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 941 | * @type_a: pointer to memblock_type from where the range is taken |
| 942 | * @type_b: pointer to memblock_type which excludes memory from being taken |
Wanpeng Li | dad7557 | 2012-06-20 12:53:01 -0700 | [diff] [blame] | 943 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 944 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 945 | * @out_nid: ptr to int for nid of the range, can be %NULL |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 946 | * |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 947 | * Reverse of __next_mem_range(). |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 948 | */ |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 949 | void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 950 | struct memblock_type *type_a, |
| 951 | struct memblock_type *type_b, |
| 952 | phys_addr_t *out_start, |
| 953 | phys_addr_t *out_end, int *out_nid) |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 954 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 955 | int idx_a = *idx & 0xffffffff; |
| 956 | int idx_b = *idx >> 32; |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 957 | |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 958 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
| 959 | nid = NUMA_NO_NODE; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 960 | |
| 961 | if (*idx == (u64)ULLONG_MAX) { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 962 | idx_a = type_a->cnt - 1; |
zijun_hu | e47608a | 2016-08-04 15:32:00 -0700 | [diff] [blame] | 963 | if (type_b != NULL) |
| 964 | idx_b = type_b->cnt; |
| 965 | else |
| 966 | idx_b = 0; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 967 | } |
| 968 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 969 | for (; idx_a >= 0; idx_a--) { |
| 970 | struct memblock_region *m = &type_a->regions[idx_a]; |
| 971 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 972 | phys_addr_t m_start = m->base; |
| 973 | phys_addr_t m_end = m->base + m->size; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 974 | int m_nid = memblock_get_region_node(m); |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 975 | |
| 976 | /* only memory regions are associated with nodes, check it */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 977 | if (nid != NUMA_NO_NODE && nid != m_nid) |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 978 | continue; |
| 979 | |
Tang Chen | 55ac590 | 2014-01-21 15:49:35 -0800 | [diff] [blame] | 980 | /* skip hotpluggable memory regions if needed */ |
| 981 | if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) |
| 982 | continue; |
| 983 | |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 984 | /* if we want mirror memory skip non-mirror memory regions */ |
| 985 | if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) |
| 986 | continue; |
| 987 | |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 988 | /* skip nomap memory unless we were asked for it explicitly */ |
| 989 | if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) |
| 990 | continue; |
| 991 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 992 | if (!type_b) { |
| 993 | if (out_start) |
| 994 | *out_start = m_start; |
| 995 | if (out_end) |
| 996 | *out_end = m_end; |
| 997 | if (out_nid) |
| 998 | *out_nid = m_nid; |
zijun_hu | fb399b4 | 2016-07-28 15:48:56 -0700 | [diff] [blame] | 999 | idx_a--; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1000 | *idx = (u32)idx_a | (u64)idx_b << 32; |
| 1001 | return; |
| 1002 | } |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1003 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1004 | /* scan areas before each reservation */ |
| 1005 | for (; idx_b >= 0; idx_b--) { |
| 1006 | struct memblock_region *r; |
| 1007 | phys_addr_t r_start; |
| 1008 | phys_addr_t r_end; |
| 1009 | |
| 1010 | r = &type_b->regions[idx_b]; |
| 1011 | r_start = idx_b ? r[-1].base + r[-1].size : 0; |
| 1012 | r_end = idx_b < type_b->cnt ? |
| 1013 | r->base : ULLONG_MAX; |
| 1014 | /* |
| 1015 | * if idx_b advanced past idx_a, |
| 1016 | * break out to advance idx_a |
| 1017 | */ |
| 1018 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1019 | if (r_end <= m_start) |
| 1020 | break; |
| 1021 | /* if the two regions intersect, we're done */ |
| 1022 | if (m_end > r_start) { |
| 1023 | if (out_start) |
| 1024 | *out_start = max(m_start, r_start); |
| 1025 | if (out_end) |
| 1026 | *out_end = min(m_end, r_end); |
| 1027 | if (out_nid) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1028 | *out_nid = m_nid; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1029 | if (m_start >= r_start) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1030 | idx_a--; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1031 | else |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1032 | idx_b--; |
| 1033 | *idx = (u32)idx_a | (u64)idx_b << 32; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1034 | return; |
| 1035 | } |
| 1036 | } |
| 1037 | } |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1038 | /* signal end of iteration */ |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1039 | *idx = ULLONG_MAX; |
| 1040 | } |
| 1041 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1042 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 1043 | /* |
| 1044 | * Common iterator interface used to define for_each_mem_range(). |
| 1045 | */ |
| 1046 | void __init_memblock __next_mem_pfn_range(int *idx, int nid, |
| 1047 | unsigned long *out_start_pfn, |
| 1048 | unsigned long *out_end_pfn, int *out_nid) |
| 1049 | { |
| 1050 | struct memblock_type *type = &memblock.memory; |
| 1051 | struct memblock_region *r; |
| 1052 | |
| 1053 | while (++*idx < type->cnt) { |
| 1054 | r = &type->regions[*idx]; |
| 1055 | |
| 1056 | if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) |
| 1057 | continue; |
| 1058 | if (nid == MAX_NUMNODES || nid == r->nid) |
| 1059 | break; |
| 1060 | } |
| 1061 | if (*idx >= type->cnt) { |
| 1062 | *idx = -1; |
| 1063 | return; |
| 1064 | } |
| 1065 | |
| 1066 | if (out_start_pfn) |
| 1067 | *out_start_pfn = PFN_UP(r->base); |
| 1068 | if (out_end_pfn) |
| 1069 | *out_end_pfn = PFN_DOWN(r->base + r->size); |
| 1070 | if (out_nid) |
| 1071 | *out_nid = r->nid; |
| 1072 | } |
| 1073 | |
| 1074 | /** |
| 1075 | * memblock_set_node - set node ID on memblock regions |
| 1076 | * @base: base of area to set node ID for |
| 1077 | * @size: size of area to set node ID for |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 1078 | * @type: memblock type to set node ID for |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1079 | * @nid: node ID to set |
| 1080 | * |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 1081 | * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1082 | * Regions which cross the area boundaries are split as necessary. |
| 1083 | * |
| 1084 | * RETURNS: |
| 1085 | * 0 on success, -errno on failure. |
| 1086 | */ |
| 1087 | int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 1088 | struct memblock_type *type, int nid) |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1089 | { |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1090 | int start_rgn, end_rgn; |
| 1091 | int i, ret; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1092 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1093 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 1094 | if (ret) |
| 1095 | return ret; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1096 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1097 | for (i = start_rgn; i < end_rgn; i++) |
Wanpeng Li | e9d24ad | 2012-10-08 16:32:21 -0700 | [diff] [blame] | 1098 | memblock_set_region_node(&type->regions[i], nid); |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1099 | |
| 1100 | memblock_merge_regions(type); |
| 1101 | return 0; |
| 1102 | } |
| 1103 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
| 1104 | |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1105 | static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, |
| 1106 | phys_addr_t align, phys_addr_t start, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1107 | phys_addr_t end, int nid, ulong flags) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1108 | { |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1109 | phys_addr_t found; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1110 | |
Grygorii Strashko | 79f40fa | 2014-01-21 15:50:12 -0800 | [diff] [blame] | 1111 | if (!align) |
| 1112 | align = SMP_CACHE_BYTES; |
Vineet Gupta | 94f3d3a | 2013-04-29 15:06:15 -0700 | [diff] [blame] | 1113 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1114 | found = memblock_find_in_range_node(size, align, start, end, nid, |
| 1115 | flags); |
Catalin Marinas | aedf95e | 2014-06-06 14:38:20 -0700 | [diff] [blame] | 1116 | if (found && !memblock_reserve(found, size)) { |
| 1117 | /* |
| 1118 | * The min_count is set to 0 so that memblock allocations are |
| 1119 | * never reported as leaks. |
| 1120 | */ |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1121 | kmemleak_alloc_phys(found, size, 0, 0); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1122 | return found; |
Catalin Marinas | aedf95e | 2014-06-06 14:38:20 -0700 | [diff] [blame] | 1123 | } |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1124 | return 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1125 | } |
| 1126 | |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1127 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1128 | phys_addr_t start, phys_addr_t end, |
| 1129 | ulong flags) |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1130 | { |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1131 | return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, |
| 1132 | flags); |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, |
| 1136 | phys_addr_t align, phys_addr_t max_addr, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1137 | int nid, ulong flags) |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1138 | { |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1139 | return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1140 | } |
| 1141 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1142 | phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) |
| 1143 | { |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 1144 | ulong flags = choose_memblock_flags(); |
| 1145 | phys_addr_t ret; |
| 1146 | |
| 1147 | again: |
| 1148 | ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, |
| 1149 | nid, flags); |
| 1150 | |
| 1151 | if (!ret && (flags & MEMBLOCK_MIRROR)) { |
| 1152 | flags &= ~MEMBLOCK_MIRROR; |
| 1153 | goto again; |
| 1154 | } |
| 1155 | return ret; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1156 | } |
| 1157 | |
| 1158 | phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) |
| 1159 | { |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1160 | return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, |
| 1161 | MEMBLOCK_NONE); |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1162 | } |
| 1163 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1164 | phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1165 | { |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1166 | phys_addr_t alloc; |
| 1167 | |
| 1168 | alloc = __memblock_alloc_base(size, align, max_addr); |
| 1169 | |
| 1170 | if (alloc == 0) |
| 1171 | panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", |
| 1172 | (unsigned long long) size, (unsigned long long) max_addr); |
| 1173 | |
| 1174 | return alloc; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1175 | } |
| 1176 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1177 | phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1178 | { |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1179 | return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1180 | } |
| 1181 | |
Benjamin Herrenschmidt | 9d1e249 | 2010-07-06 15:39:17 -0700 | [diff] [blame] | 1182 | phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) |
| 1183 | { |
| 1184 | phys_addr_t res = memblock_alloc_nid(size, align, nid); |
| 1185 | |
| 1186 | if (res) |
| 1187 | return res; |
Tejun Heo | 15fb097 | 2011-07-12 09:58:07 +0200 | [diff] [blame] | 1188 | return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1189 | } |
| 1190 | |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1191 | /** |
| 1192 | * memblock_virt_alloc_internal - allocate boot memory block |
| 1193 | * @size: size of memory block to be allocated in bytes |
| 1194 | * @align: alignment of the region and block's size |
| 1195 | * @min_addr: the lower bound of the memory region to allocate (phys address) |
| 1196 | * @max_addr: the upper bound of the memory region to allocate (phys address) |
| 1197 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1198 | * |
| 1199 | * The @min_addr limit is dropped if it can not be satisfied and the allocation |
| 1200 | * will fall back to memory below @min_addr. Also, allocation may fall back |
| 1201 | * to any node in the system if the specified node can not |
| 1202 | * hold the requested memory. |
| 1203 | * |
| 1204 | * The allocation is performed from memory region limited by |
| 1205 | * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. |
| 1206 | * |
| 1207 | * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. |
| 1208 | * |
| 1209 | * The phys address of allocated boot memory block is converted to virtual and |
| 1210 | * allocated memory is reset to 0. |
| 1211 | * |
| 1212 | * In addition, function sets the min_count to 0 using kmemleak_alloc for |
| 1213 | * allocated boot memory block, so that it is never reported as leaks. |
| 1214 | * |
| 1215 | * RETURNS: |
| 1216 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1217 | */ |
| 1218 | static void * __init memblock_virt_alloc_internal( |
| 1219 | phys_addr_t size, phys_addr_t align, |
| 1220 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1221 | int nid) |
| 1222 | { |
| 1223 | phys_addr_t alloc; |
| 1224 | void *ptr; |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 1225 | ulong flags = choose_memblock_flags(); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1226 | |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 1227 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
| 1228 | nid = NUMA_NO_NODE; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1229 | |
| 1230 | /* |
| 1231 | * Detect any accidental use of these APIs after slab is ready, as at |
| 1232 | * this moment memblock may be deinitialized already and its |
| 1233 | * internal data may be destroyed (after execution of free_all_bootmem) |
| 1234 | */ |
| 1235 | if (WARN_ON_ONCE(slab_is_available())) |
| 1236 | return kzalloc_node(size, GFP_NOWAIT, nid); |
| 1237 | |
| 1238 | if (!align) |
| 1239 | align = SMP_CACHE_BYTES; |
| 1240 | |
Yinghai Lu | f544e14 | 2014-01-29 14:05:52 -0800 | [diff] [blame] | 1241 | if (max_addr > memblock.current_limit) |
| 1242 | max_addr = memblock.current_limit; |
| 1243 | |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1244 | again: |
| 1245 | alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 1246 | nid, flags); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1247 | if (alloc) |
| 1248 | goto done; |
| 1249 | |
| 1250 | if (nid != NUMA_NO_NODE) { |
| 1251 | alloc = memblock_find_in_range_node(size, align, min_addr, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1252 | max_addr, NUMA_NO_NODE, |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 1253 | flags); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1254 | if (alloc) |
| 1255 | goto done; |
| 1256 | } |
| 1257 | |
| 1258 | if (min_addr) { |
| 1259 | min_addr = 0; |
| 1260 | goto again; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1261 | } |
| 1262 | |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 1263 | if (flags & MEMBLOCK_MIRROR) { |
| 1264 | flags &= ~MEMBLOCK_MIRROR; |
| 1265 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", |
| 1266 | &size); |
| 1267 | goto again; |
| 1268 | } |
| 1269 | |
| 1270 | return NULL; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1271 | done: |
| 1272 | memblock_reserve(alloc, size); |
| 1273 | ptr = phys_to_virt(alloc); |
| 1274 | memset(ptr, 0, size); |
| 1275 | |
| 1276 | /* |
| 1277 | * The min_count is set to 0 so that bootmem allocated blocks |
| 1278 | * are never reported as leaks. This is because many of these blocks |
| 1279 | * are only referred via the physical address which is not |
| 1280 | * looked up by kmemleak. |
| 1281 | */ |
| 1282 | kmemleak_alloc(ptr, size, 0, 0); |
| 1283 | |
| 1284 | return ptr; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1285 | } |
| 1286 | |
| 1287 | /** |
| 1288 | * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block |
| 1289 | * @size: size of memory block to be allocated in bytes |
| 1290 | * @align: alignment of the region and block's size |
| 1291 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1292 | * is preferred (phys address) |
| 1293 | * @max_addr: the upper bound of the memory region from where the allocation |
| 1294 | * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to |
| 1295 | * allocate only from memory limited by memblock.current_limit value |
| 1296 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1297 | * |
| 1298 | * Public version of _memblock_virt_alloc_try_nid_nopanic() which provides |
| 1299 | * additional debug information (including caller info), if enabled. |
| 1300 | * |
| 1301 | * RETURNS: |
| 1302 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1303 | */ |
| 1304 | void * __init memblock_virt_alloc_try_nid_nopanic( |
| 1305 | phys_addr_t size, phys_addr_t align, |
| 1306 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1307 | int nid) |
| 1308 | { |
| 1309 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", |
| 1310 | __func__, (u64)size, (u64)align, nid, (u64)min_addr, |
| 1311 | (u64)max_addr, (void *)_RET_IP_); |
| 1312 | return memblock_virt_alloc_internal(size, align, min_addr, |
| 1313 | max_addr, nid); |
| 1314 | } |
| 1315 | |
| 1316 | /** |
| 1317 | * memblock_virt_alloc_try_nid - allocate boot memory block with panicking |
| 1318 | * @size: size of memory block to be allocated in bytes |
| 1319 | * @align: alignment of the region and block's size |
| 1320 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1321 | * is preferred (phys address) |
| 1322 | * @max_addr: the upper bound of the memory region from where the allocation |
| 1323 | * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to |
| 1324 | * allocate only from memory limited by memblock.current_limit value |
| 1325 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1326 | * |
| 1327 | * Public panicking version of _memblock_virt_alloc_try_nid_nopanic() |
| 1328 | * which provides debug information (including caller info), if enabled, |
| 1329 | * and panics if the request can not be satisfied. |
| 1330 | * |
| 1331 | * RETURNS: |
| 1332 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1333 | */ |
| 1334 | void * __init memblock_virt_alloc_try_nid( |
| 1335 | phys_addr_t size, phys_addr_t align, |
| 1336 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1337 | int nid) |
| 1338 | { |
| 1339 | void *ptr; |
| 1340 | |
| 1341 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", |
| 1342 | __func__, (u64)size, (u64)align, nid, (u64)min_addr, |
| 1343 | (u64)max_addr, (void *)_RET_IP_); |
| 1344 | ptr = memblock_virt_alloc_internal(size, align, |
| 1345 | min_addr, max_addr, nid); |
| 1346 | if (ptr) |
| 1347 | return ptr; |
| 1348 | |
| 1349 | panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", |
| 1350 | __func__, (u64)size, (u64)align, nid, (u64)min_addr, |
| 1351 | (u64)max_addr); |
| 1352 | return NULL; |
| 1353 | } |
| 1354 | |
| 1355 | /** |
| 1356 | * __memblock_free_early - free boot memory block |
| 1357 | * @base: phys starting address of the boot memory block |
| 1358 | * @size: size of the boot memory block in bytes |
| 1359 | * |
| 1360 | * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. |
| 1361 | * The freeing memory will not be released to the buddy allocator. |
| 1362 | */ |
| 1363 | void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) |
| 1364 | { |
| 1365 | memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", |
| 1366 | __func__, (u64)base, (u64)base + size - 1, |
| 1367 | (void *)_RET_IP_); |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1368 | kmemleak_free_part_phys(base, size); |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1369 | memblock_remove_range(&memblock.reserved, base, size); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1370 | } |
| 1371 | |
| 1372 | /* |
| 1373 | * __memblock_free_late - free bootmem block pages directly to buddy allocator |
| 1374 | * @addr: phys starting address of the boot memory block |
| 1375 | * @size: size of the boot memory block in bytes |
| 1376 | * |
| 1377 | * This is only useful when the bootmem allocator has already been torn |
| 1378 | * down, but we are still initializing the system. Pages are released directly |
| 1379 | * to the buddy allocator, no bootmem metadata is updated because it is gone. |
| 1380 | */ |
| 1381 | void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) |
| 1382 | { |
| 1383 | u64 cursor, end; |
| 1384 | |
| 1385 | memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", |
| 1386 | __func__, (u64)base, (u64)base + size - 1, |
| 1387 | (void *)_RET_IP_); |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1388 | kmemleak_free_part_phys(base, size); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1389 | cursor = PFN_UP(base); |
| 1390 | end = PFN_DOWN(base + size); |
| 1391 | |
| 1392 | for (; cursor < end; cursor++) { |
Mel Gorman | d70ddd7 | 2015-06-30 14:56:52 -0700 | [diff] [blame] | 1393 | __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1394 | totalram_pages++; |
| 1395 | } |
| 1396 | } |
Benjamin Herrenschmidt | 9d1e249 | 2010-07-06 15:39:17 -0700 | [diff] [blame] | 1397 | |
| 1398 | /* |
| 1399 | * Remaining API functions |
| 1400 | */ |
| 1401 | |
David Gibson | 1f1ffb8a | 2016-02-05 15:36:19 -0800 | [diff] [blame] | 1402 | phys_addr_t __init_memblock memblock_phys_mem_size(void) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1403 | { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1404 | return memblock.memory.total_size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1405 | } |
| 1406 | |
Srikar Dronamraju | 8907de5 | 2016-10-07 16:59:18 -0700 | [diff] [blame] | 1407 | phys_addr_t __init_memblock memblock_reserved_size(void) |
| 1408 | { |
| 1409 | return memblock.reserved.total_size; |
| 1410 | } |
| 1411 | |
Yinghai Lu | 595ad9a | 2013-01-24 12:20:09 -0800 | [diff] [blame] | 1412 | phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) |
| 1413 | { |
| 1414 | unsigned long pages = 0; |
| 1415 | struct memblock_region *r; |
| 1416 | unsigned long start_pfn, end_pfn; |
| 1417 | |
| 1418 | for_each_memblock(memory, r) { |
| 1419 | start_pfn = memblock_region_memory_base_pfn(r); |
| 1420 | end_pfn = memblock_region_memory_end_pfn(r); |
| 1421 | start_pfn = min_t(unsigned long, start_pfn, limit_pfn); |
| 1422 | end_pfn = min_t(unsigned long, end_pfn, limit_pfn); |
| 1423 | pages += end_pfn - start_pfn; |
| 1424 | } |
| 1425 | |
Fabian Frederick | 1676323 | 2014-04-07 15:37:53 -0700 | [diff] [blame] | 1426 | return PFN_PHYS(pages); |
Yinghai Lu | 595ad9a | 2013-01-24 12:20:09 -0800 | [diff] [blame] | 1427 | } |
| 1428 | |
Sam Ravnborg | 0a93ebe | 2011-10-31 17:08:16 -0700 | [diff] [blame] | 1429 | /* lowest address */ |
| 1430 | phys_addr_t __init_memblock memblock_start_of_DRAM(void) |
| 1431 | { |
| 1432 | return memblock.memory.regions[0].base; |
| 1433 | } |
| 1434 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 1435 | phys_addr_t __init_memblock memblock_end_of_DRAM(void) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1436 | { |
| 1437 | int idx = memblock.memory.cnt - 1; |
| 1438 | |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 1439 | return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1440 | } |
| 1441 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1442 | static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1443 | { |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1444 | phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1445 | struct memblock_region *r; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1446 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1447 | /* |
| 1448 | * translate the memory @limit size into the max address within one of |
| 1449 | * the memory memblock regions, if the @limit exceeds the total size |
| 1450 | * of those regions, max_addr will keep original value ULLONG_MAX |
| 1451 | */ |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1452 | for_each_memblock(memory, r) { |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1453 | if (limit <= r->size) { |
| 1454 | max_addr = r->base + limit; |
| 1455 | break; |
| 1456 | } |
| 1457 | limit -= r->size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1458 | } |
| 1459 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1460 | return max_addr; |
| 1461 | } |
| 1462 | |
| 1463 | void __init memblock_enforce_memory_limit(phys_addr_t limit) |
| 1464 | { |
| 1465 | phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; |
| 1466 | |
| 1467 | if (!limit) |
| 1468 | return; |
| 1469 | |
| 1470 | max_addr = __find_max_addr(limit); |
| 1471 | |
| 1472 | /* @limit exceeds the total size of the memory, do nothing */ |
| 1473 | if (max_addr == (phys_addr_t)ULLONG_MAX) |
| 1474 | return; |
| 1475 | |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1476 | /* truncate both memory and reserved regions */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1477 | memblock_remove_range(&memblock.memory, max_addr, |
| 1478 | (phys_addr_t)ULLONG_MAX); |
| 1479 | memblock_remove_range(&memblock.reserved, max_addr, |
| 1480 | (phys_addr_t)ULLONG_MAX); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1481 | } |
| 1482 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1483 | void __init memblock_mem_limit_remove_map(phys_addr_t limit) |
| 1484 | { |
| 1485 | struct memblock_type *type = &memblock.memory; |
| 1486 | phys_addr_t max_addr; |
| 1487 | int i, ret, start_rgn, end_rgn; |
| 1488 | |
| 1489 | if (!limit) |
| 1490 | return; |
| 1491 | |
| 1492 | max_addr = __find_max_addr(limit); |
| 1493 | |
| 1494 | /* @limit exceeds the total size of the memory, do nothing */ |
| 1495 | if (max_addr == (phys_addr_t)ULLONG_MAX) |
| 1496 | return; |
| 1497 | |
| 1498 | ret = memblock_isolate_range(type, max_addr, (phys_addr_t)ULLONG_MAX, |
| 1499 | &start_rgn, &end_rgn); |
| 1500 | if (ret) |
| 1501 | return; |
| 1502 | |
| 1503 | /* remove all the MAP regions above the limit */ |
| 1504 | for (i = end_rgn - 1; i >= start_rgn; i--) { |
| 1505 | if (!memblock_is_nomap(&type->regions[i])) |
| 1506 | memblock_remove_region(type, i); |
| 1507 | } |
| 1508 | /* truncate the reserved regions */ |
| 1509 | memblock_remove_range(&memblock.reserved, max_addr, |
| 1510 | (phys_addr_t)ULLONG_MAX); |
| 1511 | } |
| 1512 | |
Yinghai Lu | cd79481 | 2010-10-11 12:34:09 -0700 | [diff] [blame] | 1513 | static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1514 | { |
| 1515 | unsigned int left = 0, right = type->cnt; |
| 1516 | |
| 1517 | do { |
| 1518 | unsigned int mid = (right + left) / 2; |
| 1519 | |
| 1520 | if (addr < type->regions[mid].base) |
| 1521 | right = mid; |
| 1522 | else if (addr >= (type->regions[mid].base + |
| 1523 | type->regions[mid].size)) |
| 1524 | left = mid + 1; |
| 1525 | else |
| 1526 | return mid; |
| 1527 | } while (left < right); |
| 1528 | return -1; |
| 1529 | } |
| 1530 | |
Yaowei Bai | b4ad0c7 | 2016-01-14 15:18:54 -0800 | [diff] [blame] | 1531 | bool __init memblock_is_reserved(phys_addr_t addr) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1532 | { |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1533 | return memblock_search(&memblock.reserved, addr) != -1; |
| 1534 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1535 | |
Yaowei Bai | b4ad0c7 | 2016-01-14 15:18:54 -0800 | [diff] [blame] | 1536 | bool __init_memblock memblock_is_memory(phys_addr_t addr) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1537 | { |
| 1538 | return memblock_search(&memblock.memory, addr) != -1; |
| 1539 | } |
| 1540 | |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1541 | int __init_memblock memblock_is_map_memory(phys_addr_t addr) |
| 1542 | { |
| 1543 | int i = memblock_search(&memblock.memory, addr); |
| 1544 | |
| 1545 | if (i == -1) |
| 1546 | return false; |
| 1547 | return !memblock_is_nomap(&memblock.memory.regions[i]); |
| 1548 | } |
| 1549 | |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1550 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 1551 | int __init_memblock memblock_search_pfn_nid(unsigned long pfn, |
| 1552 | unsigned long *start_pfn, unsigned long *end_pfn) |
| 1553 | { |
| 1554 | struct memblock_type *type = &memblock.memory; |
Fabian Frederick | 1676323 | 2014-04-07 15:37:53 -0700 | [diff] [blame] | 1555 | int mid = memblock_search(type, PFN_PHYS(pfn)); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1556 | |
| 1557 | if (mid == -1) |
| 1558 | return -1; |
| 1559 | |
Fabian Frederick | f7e2f7e | 2014-06-04 16:07:51 -0700 | [diff] [blame] | 1560 | *start_pfn = PFN_DOWN(type->regions[mid].base); |
| 1561 | *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1562 | |
| 1563 | return type->regions[mid].nid; |
| 1564 | } |
| 1565 | #endif |
| 1566 | |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1567 | /** |
| 1568 | * memblock_is_region_memory - check if a region is a subset of memory |
| 1569 | * @base: base of region to check |
| 1570 | * @size: size of region to check |
| 1571 | * |
| 1572 | * Check if the region [@base, @base+@size) is a subset of a memory block. |
| 1573 | * |
| 1574 | * RETURNS: |
| 1575 | * 0 if false, non-zero if true |
| 1576 | */ |
Yinghai Lu | 3661ca6 | 2010-09-15 13:05:29 -0700 | [diff] [blame] | 1577 | int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1578 | { |
Tomi Valkeinen | abb6527 | 2011-01-20 14:44:20 -0800 | [diff] [blame] | 1579 | int idx = memblock_search(&memblock.memory, base); |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1580 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1581 | |
| 1582 | if (idx == -1) |
| 1583 | return 0; |
Tomi Valkeinen | abb6527 | 2011-01-20 14:44:20 -0800 | [diff] [blame] | 1584 | return memblock.memory.regions[idx].base <= base && |
| 1585 | (memblock.memory.regions[idx].base + |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1586 | memblock.memory.regions[idx].size) >= end; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1587 | } |
| 1588 | |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1589 | /** |
| 1590 | * memblock_is_region_reserved - check if a region intersects reserved memory |
| 1591 | * @base: base of region to check |
| 1592 | * @size: size of region to check |
| 1593 | * |
| 1594 | * Check if the region [@base, @base+@size) intersects a reserved memory block. |
| 1595 | * |
| 1596 | * RETURNS: |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1597 | * True if they intersect, false if not. |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1598 | */ |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1599 | bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1600 | { |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1601 | memblock_cap_size(base, &size); |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1602 | return memblock_overlaps_region(&memblock.reserved, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1603 | } |
| 1604 | |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1605 | void __init_memblock memblock_trim_memory(phys_addr_t align) |
| 1606 | { |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1607 | phys_addr_t start, end, orig_start, orig_end; |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1608 | struct memblock_region *r; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1609 | |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1610 | for_each_memblock(memory, r) { |
| 1611 | orig_start = r->base; |
| 1612 | orig_end = r->base + r->size; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1613 | start = round_up(orig_start, align); |
| 1614 | end = round_down(orig_end, align); |
| 1615 | |
| 1616 | if (start == orig_start && end == orig_end) |
| 1617 | continue; |
| 1618 | |
| 1619 | if (start < end) { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1620 | r->base = start; |
| 1621 | r->size = end - start; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1622 | } else { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1623 | memblock_remove_region(&memblock.memory, |
| 1624 | r - memblock.memory.regions); |
| 1625 | r--; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1626 | } |
| 1627 | } |
| 1628 | } |
Benjamin Herrenschmidt | e63075a | 2010-07-06 15:39:01 -0700 | [diff] [blame] | 1629 | |
Yinghai Lu | 3661ca6 | 2010-09-15 13:05:29 -0700 | [diff] [blame] | 1630 | void __init_memblock memblock_set_current_limit(phys_addr_t limit) |
Benjamin Herrenschmidt | e63075a | 2010-07-06 15:39:01 -0700 | [diff] [blame] | 1631 | { |
| 1632 | memblock.current_limit = limit; |
| 1633 | } |
| 1634 | |
Laura Abbott | fec5101 | 2014-02-27 01:23:43 +0100 | [diff] [blame] | 1635 | phys_addr_t __init_memblock memblock_get_current_limit(void) |
| 1636 | { |
| 1637 | return memblock.current_limit; |
| 1638 | } |
| 1639 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1640 | static void __init_memblock memblock_dump(struct memblock_type *type, char *name) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1641 | { |
| 1642 | unsigned long long base, size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 1643 | unsigned long flags; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 1644 | int idx; |
| 1645 | struct memblock_region *rgn; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1646 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1647 | pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1648 | |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 1649 | for_each_memblock_type(type, rgn) { |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1650 | char nid_buf[32] = ""; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1651 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1652 | base = rgn->base; |
| 1653 | size = rgn->size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 1654 | flags = rgn->flags; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1655 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 1656 | if (memblock_get_region_node(rgn) != MAX_NUMNODES) |
| 1657 | snprintf(nid_buf, sizeof(nid_buf), " on node %d", |
| 1658 | memblock_get_region_node(rgn)); |
| 1659 | #endif |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 1660 | pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes%s flags: %#lx\n", |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 1661 | name, idx, base, base + size - 1, size, nid_buf, flags); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1662 | } |
| 1663 | } |
| 1664 | |
Michal Hocko | 292f70c | 2017-06-02 14:46:49 -0700 | [diff] [blame] | 1665 | extern unsigned long __init_memblock |
| 1666 | memblock_reserved_memory_within(phys_addr_t start_addr, phys_addr_t end_addr) |
| 1667 | { |
| 1668 | struct memblock_region *rgn; |
| 1669 | unsigned long size = 0; |
| 1670 | int idx; |
| 1671 | |
| 1672 | for_each_memblock_type((&memblock.reserved), rgn) { |
| 1673 | phys_addr_t start, end; |
| 1674 | |
| 1675 | if (rgn->base + rgn->size < start_addr) |
| 1676 | continue; |
| 1677 | if (rgn->base > end_addr) |
| 1678 | continue; |
| 1679 | |
| 1680 | start = rgn->base; |
| 1681 | end = start + rgn->size; |
| 1682 | size += end - start; |
| 1683 | } |
| 1684 | |
| 1685 | return size; |
| 1686 | } |
| 1687 | |
Tejun Heo | 4ff7b82 | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 1688 | void __init_memblock __memblock_dump_all(void) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1689 | { |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1690 | pr_info("MEMBLOCK configuration:\n"); |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1691 | pr_info(" memory size = %#llx reserved size = %#llx\n", |
| 1692 | (unsigned long long)memblock.memory.total_size, |
| 1693 | (unsigned long long)memblock.reserved.total_size); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1694 | |
| 1695 | memblock_dump(&memblock.memory, "memory"); |
| 1696 | memblock_dump(&memblock.reserved, "reserved"); |
| 1697 | } |
| 1698 | |
Tejun Heo | 1aadc05 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1699 | void __init memblock_allow_resize(void) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1700 | { |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 1701 | memblock_can_resize = 1; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1702 | } |
| 1703 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1704 | static int __init early_memblock(char *p) |
| 1705 | { |
| 1706 | if (p && strstr(p, "debug")) |
| 1707 | memblock_debug = 1; |
| 1708 | return 0; |
| 1709 | } |
| 1710 | early_param("memblock", early_memblock); |
| 1711 | |
Tejun Heo | c378ddd | 2011-07-14 11:46:03 +0200 | [diff] [blame] | 1712 | #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 1713 | |
| 1714 | static int memblock_debug_show(struct seq_file *m, void *private) |
| 1715 | { |
| 1716 | struct memblock_type *type = m->private; |
| 1717 | struct memblock_region *reg; |
| 1718 | int i; |
| 1719 | |
| 1720 | for (i = 0; i < type->cnt; i++) { |
| 1721 | reg = &type->regions[i]; |
| 1722 | seq_printf(m, "%4d: ", i); |
| 1723 | if (sizeof(phys_addr_t) == 4) |
| 1724 | seq_printf(m, "0x%08lx..0x%08lx\n", |
| 1725 | (unsigned long)reg->base, |
| 1726 | (unsigned long)(reg->base + reg->size - 1)); |
| 1727 | else |
| 1728 | seq_printf(m, "0x%016llx..0x%016llx\n", |
| 1729 | (unsigned long long)reg->base, |
| 1730 | (unsigned long long)(reg->base + reg->size - 1)); |
| 1731 | |
| 1732 | } |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | static int memblock_debug_open(struct inode *inode, struct file *file) |
| 1737 | { |
| 1738 | return single_open(file, memblock_debug_show, inode->i_private); |
| 1739 | } |
| 1740 | |
| 1741 | static const struct file_operations memblock_debug_fops = { |
| 1742 | .open = memblock_debug_open, |
| 1743 | .read = seq_read, |
| 1744 | .llseek = seq_lseek, |
| 1745 | .release = single_release, |
| 1746 | }; |
| 1747 | |
| 1748 | static int __init memblock_init_debugfs(void) |
| 1749 | { |
| 1750 | struct dentry *root = debugfs_create_dir("memblock", NULL); |
| 1751 | if (!root) |
| 1752 | return -ENXIO; |
| 1753 | debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); |
| 1754 | debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1755 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 1756 | debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); |
| 1757 | #endif |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 1758 | |
| 1759 | return 0; |
| 1760 | } |
| 1761 | __initcall(memblock_init_debugfs); |
| 1762 | |
| 1763 | #endif /* CONFIG_DEBUG_FS */ |