195f72d1eSYinghai Lu /* 295f72d1eSYinghai Lu * Procedures for maintaining information about logical memory blocks. 395f72d1eSYinghai Lu * 495f72d1eSYinghai Lu * Peter Bergner, IBM Corp. June 2001. 595f72d1eSYinghai Lu * Copyright (C) 2001 Peter Bergner. 695f72d1eSYinghai Lu * 795f72d1eSYinghai Lu * This program is free software; you can redistribute it and/or 895f72d1eSYinghai Lu * modify it under the terms of the GNU General Public License 995f72d1eSYinghai Lu * as published by the Free Software Foundation; either version 1095f72d1eSYinghai Lu * 2 of the License, or (at your option) any later version. 1195f72d1eSYinghai Lu */ 1295f72d1eSYinghai Lu 1395f72d1eSYinghai Lu #include <linux/kernel.h> 14142b45a7SBenjamin Herrenschmidt #include <linux/slab.h> 1595f72d1eSYinghai Lu #include <linux/init.h> 1695f72d1eSYinghai Lu #include <linux/bitops.h> 17449e8df3SBenjamin Herrenschmidt #include <linux/poison.h> 18c196f76fSBenjamin Herrenschmidt #include <linux/pfn.h> 196d03b885SBenjamin Herrenschmidt #include <linux/debugfs.h> 206d03b885SBenjamin Herrenschmidt #include <linux/seq_file.h> 2195f72d1eSYinghai Lu #include <linux/memblock.h> 2295f72d1eSYinghai Lu 23c4c5ad6bSChristoph Hellwig #include <asm/sections.h> 2426f09e9bSSantosh Shilimkar #include <linux/io.h> 2526f09e9bSSantosh Shilimkar 2626f09e9bSSantosh Shilimkar #include "internal.h" 2779442ed1STang Chen 28fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 29fe091c20STejun Heo static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 3070210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 3170210ed9SPhilipp Hachtmann static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; 3270210ed9SPhilipp Hachtmann #endif 33fe091c20STejun Heo 34fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 35fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 36fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 37fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 38fe091c20STejun Heo 39fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 40fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 41fe091c20STejun Heo .reserved.max = INIT_MEMBLOCK_REGIONS, 42fe091c20STejun Heo 4370210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 4470210ed9SPhilipp Hachtmann .physmem.regions = memblock_physmem_init_regions, 4570210ed9SPhilipp Hachtmann .physmem.cnt = 1, /* empty dummy entry */ 4670210ed9SPhilipp Hachtmann .physmem.max = INIT_PHYSMEM_REGIONS, 4770210ed9SPhilipp Hachtmann #endif 4870210ed9SPhilipp Hachtmann 4979442ed1STang Chen .bottom_up = false, 50fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 51fe091c20STejun Heo }; 5295f72d1eSYinghai Lu 5310d06439SYinghai Lu int memblock_debug __initdata_memblock; 5455ac590cSTang Chen #ifdef CONFIG_MOVABLE_NODE 5555ac590cSTang Chen bool movable_node_enabled __initdata_memblock = false; 5655ac590cSTang Chen #endif 57a3f5bafcSTony Luck static bool system_has_some_mirror __initdata_memblock = false; 581aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 59181eb394SGavin Shan static int memblock_memory_in_slab __initdata_memblock = 0; 60181eb394SGavin Shan static int memblock_reserved_in_slab __initdata_memblock = 0; 6195f72d1eSYinghai Lu 62a3f5bafcSTony Luck ulong __init_memblock choose_memblock_flags(void) 63a3f5bafcSTony Luck { 64a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 65a3f5bafcSTony Luck } 66a3f5bafcSTony Luck 67142b45a7SBenjamin Herrenschmidt /* inline so we don't get a warning when pr_debug is compiled out */ 68c2233116SRaghavendra D Prabhu static __init_memblock const char * 69c2233116SRaghavendra D Prabhu memblock_type_name(struct memblock_type *type) 70142b45a7SBenjamin Herrenschmidt { 71142b45a7SBenjamin Herrenschmidt if (type == &memblock.memory) 72142b45a7SBenjamin Herrenschmidt return "memory"; 73142b45a7SBenjamin Herrenschmidt else if (type == &memblock.reserved) 74142b45a7SBenjamin Herrenschmidt return "reserved"; 75142b45a7SBenjamin Herrenschmidt else 76142b45a7SBenjamin Herrenschmidt return "unknown"; 77142b45a7SBenjamin Herrenschmidt } 78142b45a7SBenjamin Herrenschmidt 79eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 80eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 81eb18f1b5STejun Heo { 82eb18f1b5STejun Heo return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); 83eb18f1b5STejun Heo } 84eb18f1b5STejun Heo 856ed311b2SBenjamin Herrenschmidt /* 866ed311b2SBenjamin Herrenschmidt * Address comparison utilities 876ed311b2SBenjamin Herrenschmidt */ 8810d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 892898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 9095f72d1eSYinghai Lu { 9195f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 9295f72d1eSYinghai Lu } 9395f72d1eSYinghai Lu 9495cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 952d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 966ed311b2SBenjamin Herrenschmidt { 976ed311b2SBenjamin Herrenschmidt unsigned long i; 986ed311b2SBenjamin Herrenschmidt 99f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 100f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 101f14516fbSAlexander Kuleshov type->regions[i].size)) 1026ed311b2SBenjamin Herrenschmidt break; 103c5c5c9d1STang Chen return i < type->cnt; 1046ed311b2SBenjamin Herrenschmidt } 1056ed311b2SBenjamin Herrenschmidt 10679442ed1STang Chen /* 10779442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 10879442ed1STang Chen * @start: start of candidate range 10979442ed1STang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 11079442ed1STang Chen * @size: size of free area to find 11179442ed1STang Chen * @align: alignment of free area to find 112b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 113fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 11479442ed1STang Chen * 11579442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 11679442ed1STang Chen * 11779442ed1STang Chen * RETURNS: 11879442ed1STang Chen * Found address on success, 0 on failure. 11979442ed1STang Chen */ 12079442ed1STang Chen static phys_addr_t __init_memblock 12179442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 122fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 123fc6daaf9STony Luck ulong flags) 12479442ed1STang Chen { 12579442ed1STang Chen phys_addr_t this_start, this_end, cand; 12679442ed1STang Chen u64 i; 12779442ed1STang Chen 128fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 12979442ed1STang Chen this_start = clamp(this_start, start, end); 13079442ed1STang Chen this_end = clamp(this_end, start, end); 13179442ed1STang Chen 13279442ed1STang Chen cand = round_up(this_start, align); 13379442ed1STang Chen if (cand < this_end && this_end - cand >= size) 13479442ed1STang Chen return cand; 13579442ed1STang Chen } 13679442ed1STang Chen 13779442ed1STang Chen return 0; 13879442ed1STang Chen } 13979442ed1STang Chen 1407bd0b0f0STejun Heo /** 1411402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 1421402899eSTang Chen * @start: start of candidate range 1431402899eSTang Chen * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 1441402899eSTang Chen * @size: size of free area to find 1451402899eSTang Chen * @align: alignment of free area to find 146b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 147fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1481402899eSTang Chen * 1491402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 1501402899eSTang Chen * 1511402899eSTang Chen * RETURNS: 15279442ed1STang Chen * Found address on success, 0 on failure. 1531402899eSTang Chen */ 1541402899eSTang Chen static phys_addr_t __init_memblock 1551402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 156fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 157fc6daaf9STony Luck ulong flags) 1581402899eSTang Chen { 1591402899eSTang Chen phys_addr_t this_start, this_end, cand; 1601402899eSTang Chen u64 i; 1611402899eSTang Chen 162fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 163fc6daaf9STony Luck NULL) { 1641402899eSTang Chen this_start = clamp(this_start, start, end); 1651402899eSTang Chen this_end = clamp(this_end, start, end); 1661402899eSTang Chen 1671402899eSTang Chen if (this_end < size) 1681402899eSTang Chen continue; 1691402899eSTang Chen 1701402899eSTang Chen cand = round_down(this_end - size, align); 1711402899eSTang Chen if (cand >= this_start) 1721402899eSTang Chen return cand; 1731402899eSTang Chen } 1741402899eSTang Chen 1751402899eSTang Chen return 0; 1761402899eSTang Chen } 1771402899eSTang Chen 1781402899eSTang Chen /** 1797bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 1807bd0b0f0STejun Heo * @size: size of free area to find 1817bd0b0f0STejun Heo * @align: alignment of free area to find 18287029ee9SGrygorii Strashko * @start: start of candidate range 18387029ee9SGrygorii Strashko * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 184b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 185fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1867bd0b0f0STejun Heo * 1877bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 1887bd0b0f0STejun Heo * 18979442ed1STang Chen * When allocation direction is bottom-up, the @start should be greater 19079442ed1STang Chen * than the end of the kernel image. Otherwise, it will be trimmed. The 19179442ed1STang Chen * reason is that we want the bottom-up allocation just near the kernel 19279442ed1STang Chen * image so it is highly likely that the allocated memory and the kernel 19379442ed1STang Chen * will reside in the same node. 19479442ed1STang Chen * 19579442ed1STang Chen * If bottom-up allocation failed, will try to allocate memory top-down. 19679442ed1STang Chen * 1977bd0b0f0STejun Heo * RETURNS: 19879442ed1STang Chen * Found address on success, 0 on failure. 1996ed311b2SBenjamin Herrenschmidt */ 20087029ee9SGrygorii Strashko phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 20187029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 202fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 203f7210e6cSTang Chen { 2040cfb8f0cSTang Chen phys_addr_t kernel_end, ret; 20579442ed1STang Chen 206f7210e6cSTang Chen /* pump up @end */ 207f7210e6cSTang Chen if (end == MEMBLOCK_ALLOC_ACCESSIBLE) 208f7210e6cSTang Chen end = memblock.current_limit; 209f7210e6cSTang Chen 210f7210e6cSTang Chen /* avoid allocating the first page */ 211f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 212f7210e6cSTang Chen end = max(start, end); 21379442ed1STang Chen kernel_end = __pa_symbol(_end); 21479442ed1STang Chen 21579442ed1STang Chen /* 21679442ed1STang Chen * try bottom-up allocation only when bottom-up mode 21779442ed1STang Chen * is set and @end is above the kernel image. 21879442ed1STang Chen */ 21979442ed1STang Chen if (memblock_bottom_up() && end > kernel_end) { 22079442ed1STang Chen phys_addr_t bottom_up_start; 22179442ed1STang Chen 22279442ed1STang Chen /* make sure we will allocate above the kernel */ 22379442ed1STang Chen bottom_up_start = max(start, kernel_end); 22479442ed1STang Chen 22579442ed1STang Chen /* ok, try bottom-up allocation first */ 22679442ed1STang Chen ret = __memblock_find_range_bottom_up(bottom_up_start, end, 227fc6daaf9STony Luck size, align, nid, flags); 22879442ed1STang Chen if (ret) 22979442ed1STang Chen return ret; 23079442ed1STang Chen 23179442ed1STang Chen /* 23279442ed1STang Chen * we always limit bottom-up allocation above the kernel, 23379442ed1STang Chen * but top-down allocation doesn't have the limit, so 23479442ed1STang Chen * retrying top-down allocation may succeed when bottom-up 23579442ed1STang Chen * allocation failed. 23679442ed1STang Chen * 23779442ed1STang Chen * bottom-up allocation is expected to be fail very rarely, 23879442ed1STang Chen * so we use WARN_ONCE() here to see the stack trace if 23979442ed1STang Chen * fail happens. 24079442ed1STang Chen */ 241756a025fSJoe Perches WARN_ONCE(1, "memblock: bottom-up allocation failed, memory hotunplug may be affected\n"); 24279442ed1STang Chen } 243f7210e6cSTang Chen 244fc6daaf9STony Luck return __memblock_find_range_top_down(start, end, size, align, nid, 245fc6daaf9STony Luck flags); 246f7210e6cSTang Chen } 2476ed311b2SBenjamin Herrenschmidt 2487bd0b0f0STejun Heo /** 2497bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 2507bd0b0f0STejun Heo * @start: start of candidate range 2517bd0b0f0STejun Heo * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} 2527bd0b0f0STejun Heo * @size: size of free area to find 2537bd0b0f0STejun Heo * @align: alignment of free area to find 2547bd0b0f0STejun Heo * 2557bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 2567bd0b0f0STejun Heo * 2577bd0b0f0STejun Heo * RETURNS: 25879442ed1STang Chen * Found address on success, 0 on failure. 2597bd0b0f0STejun Heo */ 2607bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 2617bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 2627bd0b0f0STejun Heo phys_addr_t align) 2637bd0b0f0STejun Heo { 264a3f5bafcSTony Luck phys_addr_t ret; 265a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 266a3f5bafcSTony Luck 267a3f5bafcSTony Luck again: 268a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 269a3f5bafcSTony Luck NUMA_NO_NODE, flags); 270a3f5bafcSTony Luck 271a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 272a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 273a3f5bafcSTony Luck &size); 274a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 275a3f5bafcSTony Luck goto again; 276a3f5bafcSTony Luck } 277a3f5bafcSTony Luck 278a3f5bafcSTony Luck return ret; 2797bd0b0f0STejun Heo } 2807bd0b0f0STejun Heo 28110d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 28295f72d1eSYinghai Lu { 2831440c4e2STejun Heo type->total_size -= type->regions[r].size; 2847c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 2857c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 286e3239ff9SBenjamin Herrenschmidt type->cnt--; 28795f72d1eSYinghai Lu 2888f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 2898f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 2901440c4e2STejun Heo WARN_ON(type->total_size != 0); 2918f7a6605SBenjamin Herrenschmidt type->cnt = 1; 2928f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 2938f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 29466a20757STang Chen type->regions[0].flags = 0; 2957c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 2968f7a6605SBenjamin Herrenschmidt } 29795f72d1eSYinghai Lu } 29895f72d1eSYinghai Lu 299354f17e1SPhilipp Hachtmann #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK 300354f17e1SPhilipp Hachtmann 30129f67386SYinghai Lu phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info( 30229f67386SYinghai Lu phys_addr_t *addr) 30329f67386SYinghai Lu { 30429f67386SYinghai Lu if (memblock.reserved.regions == memblock_reserved_init_regions) 30529f67386SYinghai Lu return 0; 30629f67386SYinghai Lu 30729f67386SYinghai Lu *addr = __pa(memblock.reserved.regions); 30829f67386SYinghai Lu 30929f67386SYinghai Lu return PAGE_ALIGN(sizeof(struct memblock_region) * 31029f67386SYinghai Lu memblock.reserved.max); 31129f67386SYinghai Lu } 31229f67386SYinghai Lu 3135e270e25SPhilipp Hachtmann phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info( 3145e270e25SPhilipp Hachtmann phys_addr_t *addr) 3155e270e25SPhilipp Hachtmann { 3165e270e25SPhilipp Hachtmann if (memblock.memory.regions == memblock_memory_init_regions) 3175e270e25SPhilipp Hachtmann return 0; 3185e270e25SPhilipp Hachtmann 3195e270e25SPhilipp Hachtmann *addr = __pa(memblock.memory.regions); 3205e270e25SPhilipp Hachtmann 3215e270e25SPhilipp Hachtmann return PAGE_ALIGN(sizeof(struct memblock_region) * 3225e270e25SPhilipp Hachtmann memblock.memory.max); 3235e270e25SPhilipp Hachtmann } 3245e270e25SPhilipp Hachtmann 3255e270e25SPhilipp Hachtmann #endif 3265e270e25SPhilipp Hachtmann 32748c3b583SGreg Pearson /** 32848c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 32948c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 33048c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 33148c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 33248c3b583SGreg Pearson * 33348c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 33448c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 33548c3b583SGreg Pearson * allocated memory range [@new_area_start,@new_area_start+@new_area_size] 33648c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 33748c3b583SGreg Pearson * not overlap. 33848c3b583SGreg Pearson * 33948c3b583SGreg Pearson * RETURNS: 34048c3b583SGreg Pearson * 0 on success, -1 on failure. 34148c3b583SGreg Pearson */ 34248c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 34348c3b583SGreg Pearson phys_addr_t new_area_start, 34448c3b583SGreg Pearson phys_addr_t new_area_size) 345142b45a7SBenjamin Herrenschmidt { 346142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 34729f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 348142b45a7SBenjamin Herrenschmidt phys_addr_t old_size, new_size, addr; 349142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 350181eb394SGavin Shan int *in_slab; 351142b45a7SBenjamin Herrenschmidt 352142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 353142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 354142b45a7SBenjamin Herrenschmidt */ 355142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 356142b45a7SBenjamin Herrenschmidt return -1; 357142b45a7SBenjamin Herrenschmidt 358142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 359142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 360142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 36129f67386SYinghai Lu /* 36229f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 36329f67386SYinghai Lu * so we can free them completely later. 36429f67386SYinghai Lu */ 36529f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 36629f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 367142b45a7SBenjamin Herrenschmidt 368181eb394SGavin Shan /* Retrieve the slab flag */ 369181eb394SGavin Shan if (type == &memblock.memory) 370181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 371181eb394SGavin Shan else 372181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 373181eb394SGavin Shan 374142b45a7SBenjamin Herrenschmidt /* Try to find some space for it. 375142b45a7SBenjamin Herrenschmidt * 376142b45a7SBenjamin Herrenschmidt * WARNING: We assume that either slab_is_available() and we use it or 377fd07383bSAndrew Morton * we use MEMBLOCK for allocations. That means that this is unsafe to 378fd07383bSAndrew Morton * use when bootmem is currently active (unless bootmem itself is 379fd07383bSAndrew Morton * implemented on top of MEMBLOCK which isn't the case yet) 380142b45a7SBenjamin Herrenschmidt * 381142b45a7SBenjamin Herrenschmidt * This should however not be an issue for now, as we currently only 382fd07383bSAndrew Morton * call into MEMBLOCK while it's still active, or much later when slab 383fd07383bSAndrew Morton * is active for memory hotplug operations 384142b45a7SBenjamin Herrenschmidt */ 385142b45a7SBenjamin Herrenschmidt if (use_slab) { 386142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 3871f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 3884e2f0775SGavin Shan } else { 38948c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 39048c3b583SGreg Pearson if (type != &memblock.reserved) 39148c3b583SGreg Pearson new_area_start = new_area_size = 0; 39248c3b583SGreg Pearson 39348c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 39448c3b583SGreg Pearson memblock.current_limit, 39529f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 39648c3b583SGreg Pearson if (!addr && new_area_size) 39748c3b583SGreg Pearson addr = memblock_find_in_range(0, 39848c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 39929f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 40048c3b583SGreg Pearson 40115674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 4024e2f0775SGavin Shan } 4031f5026a7STejun Heo if (!addr) { 404142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 405142b45a7SBenjamin Herrenschmidt memblock_type_name(type), type->max, type->max * 2); 406142b45a7SBenjamin Herrenschmidt return -1; 407142b45a7SBenjamin Herrenschmidt } 408142b45a7SBenjamin Herrenschmidt 409fd07383bSAndrew Morton memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", 410fd07383bSAndrew Morton memblock_type_name(type), type->max * 2, (u64)addr, 411fd07383bSAndrew Morton (u64)addr + new_size - 1); 412ea9e4376SYinghai Lu 413fd07383bSAndrew Morton /* 414fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 415fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 416fd07383bSAndrew Morton * full. 417142b45a7SBenjamin Herrenschmidt */ 418142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 419142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 420142b45a7SBenjamin Herrenschmidt old_array = type->regions; 421142b45a7SBenjamin Herrenschmidt type->regions = new_array; 422142b45a7SBenjamin Herrenschmidt type->max <<= 1; 423142b45a7SBenjamin Herrenschmidt 424fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 425181eb394SGavin Shan if (*in_slab) 426181eb394SGavin Shan kfree(old_array); 427181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 428142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 42929f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 430142b45a7SBenjamin Herrenschmidt 431fd07383bSAndrew Morton /* 432fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 433fd07383bSAndrew Morton * needn't do it 434181eb394SGavin Shan */ 435181eb394SGavin Shan if (!use_slab) 43629f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 437181eb394SGavin Shan 438181eb394SGavin Shan /* Update slab flag */ 439181eb394SGavin Shan *in_slab = use_slab; 440181eb394SGavin Shan 441142b45a7SBenjamin Herrenschmidt return 0; 442142b45a7SBenjamin Herrenschmidt } 443142b45a7SBenjamin Herrenschmidt 444784656f9STejun Heo /** 445784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 446784656f9STejun Heo * @type: memblock type to scan 447784656f9STejun Heo * 448784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 449784656f9STejun Heo */ 450784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 451784656f9STejun Heo { 452784656f9STejun Heo int i = 0; 453784656f9STejun Heo 454784656f9STejun Heo /* cnt never goes below 1 */ 455784656f9STejun Heo while (i < type->cnt - 1) { 456784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 457784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 458784656f9STejun Heo 4597c0caeb8STejun Heo if (this->base + this->size != next->base || 4607c0caeb8STejun Heo memblock_get_region_node(this) != 46166a20757STang Chen memblock_get_region_node(next) || 46266a20757STang Chen this->flags != next->flags) { 463784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 464784656f9STejun Heo i++; 465784656f9STejun Heo continue; 466784656f9STejun Heo } 467784656f9STejun Heo 468784656f9STejun Heo this->size += next->size; 469c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 470c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 471784656f9STejun Heo type->cnt--; 472784656f9STejun Heo } 473784656f9STejun Heo } 474784656f9STejun Heo 475784656f9STejun Heo /** 476784656f9STejun Heo * memblock_insert_region - insert new memblock region 477784656f9STejun Heo * @type: memblock type to insert into 478784656f9STejun Heo * @idx: index for the insertion point 479784656f9STejun Heo * @base: base address of the new region 480784656f9STejun Heo * @size: size of the new region 481209ff86dSTang Chen * @nid: node id of the new region 48266a20757STang Chen * @flags: flags of the new region 483784656f9STejun Heo * 484784656f9STejun Heo * Insert new memblock region [@base,@base+@size) into @type at @idx. 485412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 486784656f9STejun Heo */ 487784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 488784656f9STejun Heo int idx, phys_addr_t base, 48966a20757STang Chen phys_addr_t size, 49066a20757STang Chen int nid, unsigned long flags) 491784656f9STejun Heo { 492784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 493784656f9STejun Heo 494784656f9STejun Heo BUG_ON(type->cnt >= type->max); 495784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 496784656f9STejun Heo rgn->base = base; 497784656f9STejun Heo rgn->size = size; 49866a20757STang Chen rgn->flags = flags; 4997c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 500784656f9STejun Heo type->cnt++; 5011440c4e2STejun Heo type->total_size += size; 502784656f9STejun Heo } 503784656f9STejun Heo 504784656f9STejun Heo /** 505f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 506784656f9STejun Heo * @type: memblock type to add new region into 507784656f9STejun Heo * @base: base address of the new region 508784656f9STejun Heo * @size: size of the new region 5097fb0bc3fSTejun Heo * @nid: nid of the new region 51066a20757STang Chen * @flags: flags of the new region 511784656f9STejun Heo * 512784656f9STejun Heo * Add new memblock region [@base,@base+@size) into @type. The new region 513784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 514784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 515784656f9STejun Heo * compatible regions are merged) after the addition. 516784656f9STejun Heo * 517784656f9STejun Heo * RETURNS: 518784656f9STejun Heo * 0 on success, -errno on failure. 519784656f9STejun Heo */ 520f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_add_range(struct memblock_type *type, 52166a20757STang Chen phys_addr_t base, phys_addr_t size, 52266a20757STang Chen int nid, unsigned long flags) 52395f72d1eSYinghai Lu { 524784656f9STejun Heo bool insert = false; 525eb18f1b5STejun Heo phys_addr_t obase = base; 526eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5278c9c1701SAlexander Kuleshov int idx, nr_new; 5288c9c1701SAlexander Kuleshov struct memblock_region *rgn; 52995f72d1eSYinghai Lu 530b3dc627cSTejun Heo if (!size) 531b3dc627cSTejun Heo return 0; 532b3dc627cSTejun Heo 533784656f9STejun Heo /* special case for empty array */ 534784656f9STejun Heo if (type->regions[0].size == 0) { 5351440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 536784656f9STejun Heo type->regions[0].base = base; 537784656f9STejun Heo type->regions[0].size = size; 53866a20757STang Chen type->regions[0].flags = flags; 5397fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 5401440c4e2STejun Heo type->total_size = size; 541784656f9STejun Heo return 0; 542784656f9STejun Heo } 543784656f9STejun Heo repeat: 544784656f9STejun Heo /* 545784656f9STejun Heo * The following is executed twice. Once with %false @insert and 546784656f9STejun Heo * then with %true. The first counts the number of regions needed 547412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 548784656f9STejun Heo */ 549784656f9STejun Heo base = obase; 550784656f9STejun Heo nr_new = 0; 551784656f9STejun Heo 5528c9c1701SAlexander Kuleshov for_each_memblock_type(type, rgn) { 553784656f9STejun Heo phys_addr_t rbase = rgn->base; 554784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 5558f7a6605SBenjamin Herrenschmidt 556784656f9STejun Heo if (rbase >= end) 5578f7a6605SBenjamin Herrenschmidt break; 558784656f9STejun Heo if (rend <= base) 559784656f9STejun Heo continue; 560784656f9STejun Heo /* 561784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 562784656f9STejun Heo * area, insert that portion. 5638f7a6605SBenjamin Herrenschmidt */ 564784656f9STejun Heo if (rbase > base) { 565c0a29498SWei Yang #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 566c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 567c0a29498SWei Yang #endif 5684fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 569784656f9STejun Heo nr_new++; 570784656f9STejun Heo if (insert) 5718c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 57266a20757STang Chen rbase - base, nid, 57366a20757STang Chen flags); 574784656f9STejun Heo } 575784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 576784656f9STejun Heo base = min(rend, end); 5778f7a6605SBenjamin Herrenschmidt } 5788f7a6605SBenjamin Herrenschmidt 579784656f9STejun Heo /* insert the remaining portion */ 580784656f9STejun Heo if (base < end) { 581784656f9STejun Heo nr_new++; 582784656f9STejun Heo if (insert) 5838c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 58466a20757STang Chen nid, flags); 5858f7a6605SBenjamin Herrenschmidt } 5868f7a6605SBenjamin Herrenschmidt 587ef3cc4dbSnimisolo if (!nr_new) 588ef3cc4dbSnimisolo return 0; 589ef3cc4dbSnimisolo 590784656f9STejun Heo /* 591784656f9STejun Heo * If this was the first round, resize array and repeat for actual 592784656f9STejun Heo * insertions; otherwise, merge and return. 5938f7a6605SBenjamin Herrenschmidt */ 594784656f9STejun Heo if (!insert) { 595784656f9STejun Heo while (type->cnt + nr_new > type->max) 59648c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 597784656f9STejun Heo return -ENOMEM; 598784656f9STejun Heo insert = true; 599784656f9STejun Heo goto repeat; 60095f72d1eSYinghai Lu } else { 601784656f9STejun Heo memblock_merge_regions(type); 60295f72d1eSYinghai Lu return 0; 60395f72d1eSYinghai Lu } 604784656f9STejun Heo } 60595f72d1eSYinghai Lu 6067fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 6077fb0bc3fSTejun Heo int nid) 6087fb0bc3fSTejun Heo { 609f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6107fb0bc3fSTejun Heo } 6117fb0bc3fSTejun Heo 612f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 6136a4055bcSAlexander Kuleshov { 614*5d63f81cSMiles Chen phys_addr_t end = base + size - 1; 615*5d63f81cSMiles Chen 616*5d63f81cSMiles Chen memblock_dbg("memblock_add: [%pa-%pa] %pF\n", 617*5d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 6186a4055bcSAlexander Kuleshov 619f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 62095f72d1eSYinghai Lu } 62195f72d1eSYinghai Lu 6226a9ceb31STejun Heo /** 6236a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 6246a9ceb31STejun Heo * @type: memblock type to isolate range for 6256a9ceb31STejun Heo * @base: base of range to isolate 6266a9ceb31STejun Heo * @size: size of range to isolate 6276a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 6286a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 6296a9ceb31STejun Heo * 6306a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 6316a9ceb31STejun Heo * [@base,@base+@size). Crossing regions are split at the boundaries, 6326a9ceb31STejun Heo * which may create at most two more regions. The index of the first 6336a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 6346a9ceb31STejun Heo * 6356a9ceb31STejun Heo * RETURNS: 6366a9ceb31STejun Heo * 0 on success, -errno on failure. 6376a9ceb31STejun Heo */ 6386a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 6396a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 6406a9ceb31STejun Heo int *start_rgn, int *end_rgn) 6416a9ceb31STejun Heo { 642eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 6438c9c1701SAlexander Kuleshov int idx; 6448c9c1701SAlexander Kuleshov struct memblock_region *rgn; 6456a9ceb31STejun Heo 6466a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 6476a9ceb31STejun Heo 648b3dc627cSTejun Heo if (!size) 649b3dc627cSTejun Heo return 0; 650b3dc627cSTejun Heo 6516a9ceb31STejun Heo /* we'll create at most two more regions */ 6526a9ceb31STejun Heo while (type->cnt + 2 > type->max) 65348c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 6546a9ceb31STejun Heo return -ENOMEM; 6556a9ceb31STejun Heo 6568c9c1701SAlexander Kuleshov for_each_memblock_type(type, rgn) { 6576a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 6586a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 6596a9ceb31STejun Heo 6606a9ceb31STejun Heo if (rbase >= end) 6616a9ceb31STejun Heo break; 6626a9ceb31STejun Heo if (rend <= base) 6636a9ceb31STejun Heo continue; 6646a9ceb31STejun Heo 6656a9ceb31STejun Heo if (rbase < base) { 6666a9ceb31STejun Heo /* 6676a9ceb31STejun Heo * @rgn intersects from below. Split and continue 6686a9ceb31STejun Heo * to process the next region - the new top half. 6696a9ceb31STejun Heo */ 6706a9ceb31STejun Heo rgn->base = base; 6711440c4e2STejun Heo rgn->size -= base - rbase; 6721440c4e2STejun Heo type->total_size -= base - rbase; 6738c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 67466a20757STang Chen memblock_get_region_node(rgn), 67566a20757STang Chen rgn->flags); 6766a9ceb31STejun Heo } else if (rend > end) { 6776a9ceb31STejun Heo /* 6786a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 6796a9ceb31STejun Heo * current region - the new bottom half. 6806a9ceb31STejun Heo */ 6816a9ceb31STejun Heo rgn->base = end; 6821440c4e2STejun Heo rgn->size -= end - rbase; 6831440c4e2STejun Heo type->total_size -= end - rbase; 6848c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 68566a20757STang Chen memblock_get_region_node(rgn), 68666a20757STang Chen rgn->flags); 6876a9ceb31STejun Heo } else { 6886a9ceb31STejun Heo /* @rgn is fully contained, record it */ 6896a9ceb31STejun Heo if (!*end_rgn) 6908c9c1701SAlexander Kuleshov *start_rgn = idx; 6918c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 6926a9ceb31STejun Heo } 6936a9ceb31STejun Heo } 6946a9ceb31STejun Heo 6956a9ceb31STejun Heo return 0; 6966a9ceb31STejun Heo } 6976a9ceb31STejun Heo 69835bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 6998f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 70095f72d1eSYinghai Lu { 70171936180STejun Heo int start_rgn, end_rgn; 70271936180STejun Heo int i, ret; 70395f72d1eSYinghai Lu 70471936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 70571936180STejun Heo if (ret) 70671936180STejun Heo return ret; 70795f72d1eSYinghai Lu 70871936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 70971936180STejun Heo memblock_remove_region(type, i); 71095f72d1eSYinghai Lu return 0; 71195f72d1eSYinghai Lu } 71295f72d1eSYinghai Lu 713581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 71495f72d1eSYinghai Lu { 715f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 71695f72d1eSYinghai Lu } 71795f72d1eSYinghai Lu 718f1af9d3aSPhilipp Hachtmann 719581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 72095f72d1eSYinghai Lu { 721*5d63f81cSMiles Chen phys_addr_t end = base + size - 1; 722*5d63f81cSMiles Chen 723*5d63f81cSMiles Chen memblock_dbg(" memblock_free: [%pa-%pa] %pF\n", 724*5d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 72524aa0788STejun Heo 7269099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 727f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 72895f72d1eSYinghai Lu } 72995f72d1eSYinghai Lu 730f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 73195f72d1eSYinghai Lu { 732*5d63f81cSMiles Chen phys_addr_t end = base + size - 1; 733*5d63f81cSMiles Chen 734*5d63f81cSMiles Chen memblock_dbg("memblock_reserve: [%pa-%pa] %pF\n", 735*5d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 73695f72d1eSYinghai Lu 737f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 73895f72d1eSYinghai Lu } 73995f72d1eSYinghai Lu 74035fd0808STejun Heo /** 74166b16edfSTang Chen * 7424308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 74366b16edfSTang Chen * 744c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 74566b16edfSTang Chen */ 7464308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 7474308ce17STony Luck phys_addr_t size, int set, int flag) 74866b16edfSTang Chen { 74966b16edfSTang Chen struct memblock_type *type = &memblock.memory; 75066b16edfSTang Chen int i, ret, start_rgn, end_rgn; 75166b16edfSTang Chen 75266b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 75366b16edfSTang Chen if (ret) 75466b16edfSTang Chen return ret; 75566b16edfSTang Chen 75666b16edfSTang Chen for (i = start_rgn; i < end_rgn; i++) 7574308ce17STony Luck if (set) 7584308ce17STony Luck memblock_set_region_flags(&type->regions[i], flag); 7594308ce17STony Luck else 7604308ce17STony Luck memblock_clear_region_flags(&type->regions[i], flag); 76166b16edfSTang Chen 76266b16edfSTang Chen memblock_merge_regions(type); 76366b16edfSTang Chen return 0; 76466b16edfSTang Chen } 76566b16edfSTang Chen 76666b16edfSTang Chen /** 7674308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 7684308ce17STony Luck * @base: the base phys addr of the region 7694308ce17STony Luck * @size: the size of the region 7704308ce17STony Luck * 771c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 7724308ce17STony Luck */ 7734308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 7744308ce17STony Luck { 7754308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 7764308ce17STony Luck } 7774308ce17STony Luck 7784308ce17STony Luck /** 77966b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 78066b16edfSTang Chen * @base: the base phys addr of the region 78166b16edfSTang Chen * @size: the size of the region 78266b16edfSTang Chen * 783c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 78466b16edfSTang Chen */ 78566b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 78666b16edfSTang Chen { 7874308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 78866b16edfSTang Chen } 78966b16edfSTang Chen 79066b16edfSTang Chen /** 791a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 792a3f5bafcSTony Luck * @base: the base phys addr of the region 793a3f5bafcSTony Luck * @size: the size of the region 794a3f5bafcSTony Luck * 795c1153931SAlexander Kuleshov * Return 0 on success, -errno on failure. 796a3f5bafcSTony Luck */ 797a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 798a3f5bafcSTony Luck { 799a3f5bafcSTony Luck system_has_some_mirror = true; 800a3f5bafcSTony Luck 801a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 802a3f5bafcSTony Luck } 803a3f5bafcSTony Luck 804bf3d3cc5SArd Biesheuvel /** 805bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 806bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 807bf3d3cc5SArd Biesheuvel * @size: the size of the region 808bf3d3cc5SArd Biesheuvel * 809bf3d3cc5SArd Biesheuvel * Return 0 on success, -errno on failure. 810bf3d3cc5SArd Biesheuvel */ 811bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 812bf3d3cc5SArd Biesheuvel { 813bf3d3cc5SArd Biesheuvel return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); 814bf3d3cc5SArd Biesheuvel } 815a3f5bafcSTony Luck 816a3f5bafcSTony Luck /** 8178e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 8188e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 8198e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 8208e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 8218e7a7f86SRobin Holt * 8228e7a7f86SRobin Holt * Iterate over all reserved memory regions. 8238e7a7f86SRobin Holt */ 8248e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 8258e7a7f86SRobin Holt phys_addr_t *out_start, 8268e7a7f86SRobin Holt phys_addr_t *out_end) 8278e7a7f86SRobin Holt { 828567d117bSAlexander Kuleshov struct memblock_type *type = &memblock.reserved; 8298e7a7f86SRobin Holt 830cd33a76bSRichard Leitner if (*idx < type->cnt) { 831567d117bSAlexander Kuleshov struct memblock_region *r = &type->regions[*idx]; 8328e7a7f86SRobin Holt phys_addr_t base = r->base; 8338e7a7f86SRobin Holt phys_addr_t size = r->size; 8348e7a7f86SRobin Holt 8358e7a7f86SRobin Holt if (out_start) 8368e7a7f86SRobin Holt *out_start = base; 8378e7a7f86SRobin Holt if (out_end) 8388e7a7f86SRobin Holt *out_end = base + size - 1; 8398e7a7f86SRobin Holt 8408e7a7f86SRobin Holt *idx += 1; 8418e7a7f86SRobin Holt return; 8428e7a7f86SRobin Holt } 8438e7a7f86SRobin Holt 8448e7a7f86SRobin Holt /* signal end of iteration */ 8458e7a7f86SRobin Holt *idx = ULLONG_MAX; 8468e7a7f86SRobin Holt } 8478e7a7f86SRobin Holt 8488e7a7f86SRobin Holt /** 849f1af9d3aSPhilipp Hachtmann * __next__mem_range - next function for for_each_free_mem_range() etc. 85035fd0808STejun Heo * @idx: pointer to u64 loop variable 851b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 852fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 853f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 854f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 855dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 856dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 857dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 85835fd0808STejun Heo * 859f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 86035fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 861f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 862f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 86335fd0808STejun Heo * look like the following, 86435fd0808STejun Heo * 86535fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 86635fd0808STejun Heo * 86735fd0808STejun Heo * The upper 32bit indexes the following regions. 86835fd0808STejun Heo * 86935fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 87035fd0808STejun Heo * 87135fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 87235fd0808STejun Heo * in lockstep and returns each intersection. 87335fd0808STejun Heo */ 874fc6daaf9STony Luck void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, 875f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 876f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 87735fd0808STejun Heo phys_addr_t *out_start, 87835fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 87935fd0808STejun Heo { 880f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 881f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 882b1154233SGrygorii Strashko 883f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 884f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 885560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 88635fd0808STejun Heo 887f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 888f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 889f1af9d3aSPhilipp Hachtmann 89035fd0808STejun Heo phys_addr_t m_start = m->base; 89135fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 892f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 89335fd0808STejun Heo 89435fd0808STejun Heo /* only memory regions are associated with nodes, check it */ 895f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 89635fd0808STejun Heo continue; 89735fd0808STejun Heo 8980a313a99SXishi Qiu /* skip hotpluggable memory regions if needed */ 8990a313a99SXishi Qiu if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 9000a313a99SXishi Qiu continue; 9010a313a99SXishi Qiu 902a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 903a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 904a3f5bafcSTony Luck continue; 905a3f5bafcSTony Luck 906bf3d3cc5SArd Biesheuvel /* skip nomap memory unless we were asked for it explicitly */ 907bf3d3cc5SArd Biesheuvel if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 908bf3d3cc5SArd Biesheuvel continue; 909bf3d3cc5SArd Biesheuvel 910f1af9d3aSPhilipp Hachtmann if (!type_b) { 911f1af9d3aSPhilipp Hachtmann if (out_start) 912f1af9d3aSPhilipp Hachtmann *out_start = m_start; 913f1af9d3aSPhilipp Hachtmann if (out_end) 914f1af9d3aSPhilipp Hachtmann *out_end = m_end; 915f1af9d3aSPhilipp Hachtmann if (out_nid) 916f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 917f1af9d3aSPhilipp Hachtmann idx_a++; 918f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 919f1af9d3aSPhilipp Hachtmann return; 920f1af9d3aSPhilipp Hachtmann } 92135fd0808STejun Heo 922f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 923f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 924f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 925f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 926f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 927f1af9d3aSPhilipp Hachtmann 928f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 929f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 930f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 931f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 932f1af9d3aSPhilipp Hachtmann 933f1af9d3aSPhilipp Hachtmann /* 934f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 935f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 936f1af9d3aSPhilipp Hachtmann */ 93735fd0808STejun Heo if (r_start >= m_end) 93835fd0808STejun Heo break; 93935fd0808STejun Heo /* if the two regions intersect, we're done */ 94035fd0808STejun Heo if (m_start < r_end) { 94135fd0808STejun Heo if (out_start) 942f1af9d3aSPhilipp Hachtmann *out_start = 943f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 94435fd0808STejun Heo if (out_end) 94535fd0808STejun Heo *out_end = min(m_end, r_end); 94635fd0808STejun Heo if (out_nid) 947f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 94835fd0808STejun Heo /* 949f1af9d3aSPhilipp Hachtmann * The region which ends first is 950f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 95135fd0808STejun Heo */ 95235fd0808STejun Heo if (m_end <= r_end) 953f1af9d3aSPhilipp Hachtmann idx_a++; 95435fd0808STejun Heo else 955f1af9d3aSPhilipp Hachtmann idx_b++; 956f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 95735fd0808STejun Heo return; 95835fd0808STejun Heo } 95935fd0808STejun Heo } 96035fd0808STejun Heo } 96135fd0808STejun Heo 96235fd0808STejun Heo /* signal end of iteration */ 96335fd0808STejun Heo *idx = ULLONG_MAX; 96435fd0808STejun Heo } 96535fd0808STejun Heo 9667bd0b0f0STejun Heo /** 967f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 968f1af9d3aSPhilipp Hachtmann * 969f1af9d3aSPhilipp Hachtmann * Finds the next range from type_a which is not marked as unsuitable 970f1af9d3aSPhilipp Hachtmann * in type_b. 971f1af9d3aSPhilipp Hachtmann * 9727bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 973ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 974fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 975f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 976f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 977dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 978dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 979dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 9807bd0b0f0STejun Heo * 981f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 9827bd0b0f0STejun Heo */ 983fc6daaf9STony Luck void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, 984f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 985f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 9867bd0b0f0STejun Heo phys_addr_t *out_start, 9877bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 9887bd0b0f0STejun Heo { 989f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 990f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 991b1154233SGrygorii Strashko 992560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 993560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 9947bd0b0f0STejun Heo 9957bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 996f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 997e47608abSzijun_hu if (type_b != NULL) 998f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 999e47608abSzijun_hu else 1000e47608abSzijun_hu idx_b = 0; 10017bd0b0f0STejun Heo } 10027bd0b0f0STejun Heo 1003f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1004f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1005f1af9d3aSPhilipp Hachtmann 10067bd0b0f0STejun Heo phys_addr_t m_start = m->base; 10077bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1008f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 10097bd0b0f0STejun Heo 10107bd0b0f0STejun Heo /* only memory regions are associated with nodes, check it */ 1011f1af9d3aSPhilipp Hachtmann if (nid != NUMA_NO_NODE && nid != m_nid) 10127bd0b0f0STejun Heo continue; 10137bd0b0f0STejun Heo 101455ac590cSTang Chen /* skip hotpluggable memory regions if needed */ 101555ac590cSTang Chen if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 101655ac590cSTang Chen continue; 101755ac590cSTang Chen 1018a3f5bafcSTony Luck /* if we want mirror memory skip non-mirror memory regions */ 1019a3f5bafcSTony Luck if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 1020a3f5bafcSTony Luck continue; 1021a3f5bafcSTony Luck 1022bf3d3cc5SArd Biesheuvel /* skip nomap memory unless we were asked for it explicitly */ 1023bf3d3cc5SArd Biesheuvel if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 1024bf3d3cc5SArd Biesheuvel continue; 1025bf3d3cc5SArd Biesheuvel 1026f1af9d3aSPhilipp Hachtmann if (!type_b) { 1027f1af9d3aSPhilipp Hachtmann if (out_start) 1028f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1029f1af9d3aSPhilipp Hachtmann if (out_end) 1030f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1031f1af9d3aSPhilipp Hachtmann if (out_nid) 1032f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1033fb399b48Szijun_hu idx_a--; 1034f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1035f1af9d3aSPhilipp Hachtmann return; 1036f1af9d3aSPhilipp Hachtmann } 10377bd0b0f0STejun Heo 1038f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1039f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1040f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1041f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1042f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1043f1af9d3aSPhilipp Hachtmann 1044f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1045f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1046f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 1047f1af9d3aSPhilipp Hachtmann r->base : ULLONG_MAX; 1048f1af9d3aSPhilipp Hachtmann /* 1049f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1050f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1051f1af9d3aSPhilipp Hachtmann */ 1052f1af9d3aSPhilipp Hachtmann 10537bd0b0f0STejun Heo if (r_end <= m_start) 10547bd0b0f0STejun Heo break; 10557bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 10567bd0b0f0STejun Heo if (m_end > r_start) { 10577bd0b0f0STejun Heo if (out_start) 10587bd0b0f0STejun Heo *out_start = max(m_start, r_start); 10597bd0b0f0STejun Heo if (out_end) 10607bd0b0f0STejun Heo *out_end = min(m_end, r_end); 10617bd0b0f0STejun Heo if (out_nid) 1062f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 10637bd0b0f0STejun Heo if (m_start >= r_start) 1064f1af9d3aSPhilipp Hachtmann idx_a--; 10657bd0b0f0STejun Heo else 1066f1af9d3aSPhilipp Hachtmann idx_b--; 1067f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 10687bd0b0f0STejun Heo return; 10697bd0b0f0STejun Heo } 10707bd0b0f0STejun Heo } 10717bd0b0f0STejun Heo } 1072f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 10737bd0b0f0STejun Heo *idx = ULLONG_MAX; 10747bd0b0f0STejun Heo } 10757bd0b0f0STejun Heo 10767c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 10777c0caeb8STejun Heo /* 10787c0caeb8STejun Heo * Common iterator interface used to define for_each_mem_range(). 10797c0caeb8STejun Heo */ 10807c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 10817c0caeb8STejun Heo unsigned long *out_start_pfn, 10827c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 10837c0caeb8STejun Heo { 10847c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 10857c0caeb8STejun Heo struct memblock_region *r; 10867c0caeb8STejun Heo 10877c0caeb8STejun Heo while (++*idx < type->cnt) { 10887c0caeb8STejun Heo r = &type->regions[*idx]; 10897c0caeb8STejun Heo 10907c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 10917c0caeb8STejun Heo continue; 10927c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 10937c0caeb8STejun Heo break; 10947c0caeb8STejun Heo } 10957c0caeb8STejun Heo if (*idx >= type->cnt) { 10967c0caeb8STejun Heo *idx = -1; 10977c0caeb8STejun Heo return; 10987c0caeb8STejun Heo } 10997c0caeb8STejun Heo 11007c0caeb8STejun Heo if (out_start_pfn) 11017c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 11027c0caeb8STejun Heo if (out_end_pfn) 11037c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 11047c0caeb8STejun Heo if (out_nid) 11057c0caeb8STejun Heo *out_nid = r->nid; 11067c0caeb8STejun Heo } 11077c0caeb8STejun Heo 1108b92df1deSPaul Burton unsigned long __init_memblock memblock_next_valid_pfn(unsigned long pfn, 1109b92df1deSPaul Burton unsigned long max_pfn) 1110b92df1deSPaul Burton { 1111b92df1deSPaul Burton struct memblock_type *type = &memblock.memory; 1112b92df1deSPaul Burton unsigned int right = type->cnt; 1113b92df1deSPaul Burton unsigned int mid, left = 0; 1114b92df1deSPaul Burton phys_addr_t addr = PFN_PHYS(pfn + 1); 1115b92df1deSPaul Burton 1116b92df1deSPaul Burton do { 1117b92df1deSPaul Burton mid = (right + left) / 2; 1118b92df1deSPaul Burton 1119b92df1deSPaul Burton if (addr < type->regions[mid].base) 1120b92df1deSPaul Burton right = mid; 1121b92df1deSPaul Burton else if (addr >= (type->regions[mid].base + 1122b92df1deSPaul Burton type->regions[mid].size)) 1123b92df1deSPaul Burton left = mid + 1; 1124b92df1deSPaul Burton else { 1125b92df1deSPaul Burton /* addr is within the region, so pfn + 1 is valid */ 1126b92df1deSPaul Burton return min(pfn + 1, max_pfn); 1127b92df1deSPaul Burton } 1128b92df1deSPaul Burton } while (left < right); 1129b92df1deSPaul Burton 1130b92df1deSPaul Burton return min(PHYS_PFN(type->regions[right].base), max_pfn); 1131b92df1deSPaul Burton } 1132b92df1deSPaul Burton 11337c0caeb8STejun Heo /** 11347c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 11357c0caeb8STejun Heo * @base: base of area to set node ID for 11367c0caeb8STejun Heo * @size: size of area to set node ID for 1137e7e8de59STang Chen * @type: memblock type to set node ID for 11387c0caeb8STejun Heo * @nid: node ID to set 11397c0caeb8STejun Heo * 1140e7e8de59STang Chen * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. 11417c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 11427c0caeb8STejun Heo * 11437c0caeb8STejun Heo * RETURNS: 11447c0caeb8STejun Heo * 0 on success, -errno on failure. 11457c0caeb8STejun Heo */ 11467c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1147e7e8de59STang Chen struct memblock_type *type, int nid) 11487c0caeb8STejun Heo { 11496a9ceb31STejun Heo int start_rgn, end_rgn; 11506a9ceb31STejun Heo int i, ret; 11517c0caeb8STejun Heo 11526a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 11536a9ceb31STejun Heo if (ret) 11546a9ceb31STejun Heo return ret; 11557c0caeb8STejun Heo 11566a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1157e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 11587c0caeb8STejun Heo 11597c0caeb8STejun Heo memblock_merge_regions(type); 11607c0caeb8STejun Heo return 0; 11617c0caeb8STejun Heo } 11627c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 11637c0caeb8STejun Heo 11642bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 11652bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 1166fc6daaf9STony Luck phys_addr_t end, int nid, ulong flags) 116795f72d1eSYinghai Lu { 11686ed311b2SBenjamin Herrenschmidt phys_addr_t found; 116995f72d1eSYinghai Lu 117079f40fabSGrygorii Strashko if (!align) 117179f40fabSGrygorii Strashko align = SMP_CACHE_BYTES; 117294f3d3afSVineet Gupta 1173fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1174fc6daaf9STony Luck flags); 1175aedf95eaSCatalin Marinas if (found && !memblock_reserve(found, size)) { 1176aedf95eaSCatalin Marinas /* 1177aedf95eaSCatalin Marinas * The min_count is set to 0 so that memblock allocations are 1178aedf95eaSCatalin Marinas * never reported as leaks. 1179aedf95eaSCatalin Marinas */ 11809099daedSCatalin Marinas kmemleak_alloc_phys(found, size, 0, 0); 11816ed311b2SBenjamin Herrenschmidt return found; 1182aedf95eaSCatalin Marinas } 11836ed311b2SBenjamin Herrenschmidt return 0; 118495f72d1eSYinghai Lu } 118595f72d1eSYinghai Lu 11862bfc2862SAkinobu Mita phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, 1187fc6daaf9STony Luck phys_addr_t start, phys_addr_t end, 1188fc6daaf9STony Luck ulong flags) 11892bfc2862SAkinobu Mita { 1190fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 1191fc6daaf9STony Luck flags); 11922bfc2862SAkinobu Mita } 11932bfc2862SAkinobu Mita 11942bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, 11952bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t max_addr, 1196fc6daaf9STony Luck int nid, ulong flags) 11972bfc2862SAkinobu Mita { 1198fc6daaf9STony Luck return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); 11992bfc2862SAkinobu Mita } 12002bfc2862SAkinobu Mita 12017bd0b0f0STejun Heo phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) 12027bd0b0f0STejun Heo { 1203a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 1204a3f5bafcSTony Luck phys_addr_t ret; 1205a3f5bafcSTony Luck 1206a3f5bafcSTony Luck again: 1207a3f5bafcSTony Luck ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, 1208a3f5bafcSTony Luck nid, flags); 1209a3f5bafcSTony Luck 1210a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 1211a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1212a3f5bafcSTony Luck goto again; 1213a3f5bafcSTony Luck } 1214a3f5bafcSTony Luck return ret; 12157bd0b0f0STejun Heo } 12167bd0b0f0STejun Heo 12177bd0b0f0STejun Heo phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 12187bd0b0f0STejun Heo { 1219fc6daaf9STony Luck return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, 1220fc6daaf9STony Luck MEMBLOCK_NONE); 12217bd0b0f0STejun Heo } 12227bd0b0f0STejun Heo 12236ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) 122495f72d1eSYinghai Lu { 12256ed311b2SBenjamin Herrenschmidt phys_addr_t alloc; 12266ed311b2SBenjamin Herrenschmidt 12276ed311b2SBenjamin Herrenschmidt alloc = __memblock_alloc_base(size, align, max_addr); 12286ed311b2SBenjamin Herrenschmidt 12296ed311b2SBenjamin Herrenschmidt if (alloc == 0) 1230*5d63f81cSMiles Chen panic("ERROR: Failed to allocate %pa bytes below %pa.\n", 1231*5d63f81cSMiles Chen &size, &max_addr); 12326ed311b2SBenjamin Herrenschmidt 12336ed311b2SBenjamin Herrenschmidt return alloc; 123495f72d1eSYinghai Lu } 123595f72d1eSYinghai Lu 12366ed311b2SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) 123795f72d1eSYinghai Lu { 12386ed311b2SBenjamin Herrenschmidt return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 123995f72d1eSYinghai Lu } 124095f72d1eSYinghai Lu 12419d1e2492SBenjamin Herrenschmidt phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 12429d1e2492SBenjamin Herrenschmidt { 12439d1e2492SBenjamin Herrenschmidt phys_addr_t res = memblock_alloc_nid(size, align, nid); 12449d1e2492SBenjamin Herrenschmidt 12459d1e2492SBenjamin Herrenschmidt if (res) 12469d1e2492SBenjamin Herrenschmidt return res; 124715fb0972STejun Heo return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); 124895f72d1eSYinghai Lu } 124995f72d1eSYinghai Lu 125026f09e9bSSantosh Shilimkar /** 125126f09e9bSSantosh Shilimkar * memblock_virt_alloc_internal - allocate boot memory block 125226f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 125326f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 125426f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 125526f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 125626f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 125726f09e9bSSantosh Shilimkar * 125826f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 125926f09e9bSSantosh Shilimkar * will fall back to memory below @min_addr. Also, allocation may fall back 126026f09e9bSSantosh Shilimkar * to any node in the system if the specified node can not 126126f09e9bSSantosh Shilimkar * hold the requested memory. 126226f09e9bSSantosh Shilimkar * 126326f09e9bSSantosh Shilimkar * The allocation is performed from memory region limited by 126426f09e9bSSantosh Shilimkar * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. 126526f09e9bSSantosh Shilimkar * 126626f09e9bSSantosh Shilimkar * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. 126726f09e9bSSantosh Shilimkar * 126826f09e9bSSantosh Shilimkar * The phys address of allocated boot memory block is converted to virtual and 126926f09e9bSSantosh Shilimkar * allocated memory is reset to 0. 127026f09e9bSSantosh Shilimkar * 127126f09e9bSSantosh Shilimkar * In addition, function sets the min_count to 0 using kmemleak_alloc for 127226f09e9bSSantosh Shilimkar * allocated boot memory block, so that it is never reported as leaks. 127326f09e9bSSantosh Shilimkar * 127426f09e9bSSantosh Shilimkar * RETURNS: 127526f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 127626f09e9bSSantosh Shilimkar */ 127726f09e9bSSantosh Shilimkar static void * __init memblock_virt_alloc_internal( 127826f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 127926f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 128026f09e9bSSantosh Shilimkar int nid) 128126f09e9bSSantosh Shilimkar { 128226f09e9bSSantosh Shilimkar phys_addr_t alloc; 128326f09e9bSSantosh Shilimkar void *ptr; 1284a3f5bafcSTony Luck ulong flags = choose_memblock_flags(); 128526f09e9bSSantosh Shilimkar 1286560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1287560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 128826f09e9bSSantosh Shilimkar 128926f09e9bSSantosh Shilimkar /* 129026f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 129126f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 129226f09e9bSSantosh Shilimkar * internal data may be destroyed (after execution of free_all_bootmem) 129326f09e9bSSantosh Shilimkar */ 129426f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 129526f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 129626f09e9bSSantosh Shilimkar 129726f09e9bSSantosh Shilimkar if (!align) 129826f09e9bSSantosh Shilimkar align = SMP_CACHE_BYTES; 129926f09e9bSSantosh Shilimkar 1300f544e14fSYinghai Lu if (max_addr > memblock.current_limit) 1301f544e14fSYinghai Lu max_addr = memblock.current_limit; 130226f09e9bSSantosh Shilimkar again: 130326f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, 1304a3f5bafcSTony Luck nid, flags); 13057d41c03eSWei Yang if (alloc && !memblock_reserve(alloc, size)) 130626f09e9bSSantosh Shilimkar goto done; 130726f09e9bSSantosh Shilimkar 130826f09e9bSSantosh Shilimkar if (nid != NUMA_NO_NODE) { 130926f09e9bSSantosh Shilimkar alloc = memblock_find_in_range_node(size, align, min_addr, 1310fc6daaf9STony Luck max_addr, NUMA_NO_NODE, 1311a3f5bafcSTony Luck flags); 13127d41c03eSWei Yang if (alloc && !memblock_reserve(alloc, size)) 131326f09e9bSSantosh Shilimkar goto done; 131426f09e9bSSantosh Shilimkar } 131526f09e9bSSantosh Shilimkar 131626f09e9bSSantosh Shilimkar if (min_addr) { 131726f09e9bSSantosh Shilimkar min_addr = 0; 131826f09e9bSSantosh Shilimkar goto again; 131926f09e9bSSantosh Shilimkar } 132026f09e9bSSantosh Shilimkar 1321a3f5bafcSTony Luck if (flags & MEMBLOCK_MIRROR) { 1322a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 1323a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 1324a3f5bafcSTony Luck &size); 1325a3f5bafcSTony Luck goto again; 1326a3f5bafcSTony Luck } 1327a3f5bafcSTony Luck 1328a3f5bafcSTony Luck return NULL; 132926f09e9bSSantosh Shilimkar done: 133026f09e9bSSantosh Shilimkar ptr = phys_to_virt(alloc); 133126f09e9bSSantosh Shilimkar memset(ptr, 0, size); 133226f09e9bSSantosh Shilimkar 133326f09e9bSSantosh Shilimkar /* 133426f09e9bSSantosh Shilimkar * The min_count is set to 0 so that bootmem allocated blocks 133526f09e9bSSantosh Shilimkar * are never reported as leaks. This is because many of these blocks 133626f09e9bSSantosh Shilimkar * are only referred via the physical address which is not 133726f09e9bSSantosh Shilimkar * looked up by kmemleak. 133826f09e9bSSantosh Shilimkar */ 133926f09e9bSSantosh Shilimkar kmemleak_alloc(ptr, size, 0, 0); 134026f09e9bSSantosh Shilimkar 134126f09e9bSSantosh Shilimkar return ptr; 134226f09e9bSSantosh Shilimkar } 134326f09e9bSSantosh Shilimkar 134426f09e9bSSantosh Shilimkar /** 134526f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block 134626f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 134726f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 134826f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 134926f09e9bSSantosh Shilimkar * is preferred (phys address) 135026f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 135126f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 135226f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 135326f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 135426f09e9bSSantosh Shilimkar * 135526f09e9bSSantosh Shilimkar * Public version of _memblock_virt_alloc_try_nid_nopanic() which provides 135626f09e9bSSantosh Shilimkar * additional debug information (including caller info), if enabled. 135726f09e9bSSantosh Shilimkar * 135826f09e9bSSantosh Shilimkar * RETURNS: 135926f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 136026f09e9bSSantosh Shilimkar */ 136126f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid_nopanic( 136226f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 136326f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 136426f09e9bSSantosh Shilimkar int nid) 136526f09e9bSSantosh Shilimkar { 136626f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 136726f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 136826f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 136926f09e9bSSantosh Shilimkar return memblock_virt_alloc_internal(size, align, min_addr, 137026f09e9bSSantosh Shilimkar max_addr, nid); 137126f09e9bSSantosh Shilimkar } 137226f09e9bSSantosh Shilimkar 137326f09e9bSSantosh Shilimkar /** 137426f09e9bSSantosh Shilimkar * memblock_virt_alloc_try_nid - allocate boot memory block with panicking 137526f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 137626f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 137726f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 137826f09e9bSSantosh Shilimkar * is preferred (phys address) 137926f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 138026f09e9bSSantosh Shilimkar * is preferred (phys address), or %BOOTMEM_ALLOC_ACCESSIBLE to 138126f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 138226f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 138326f09e9bSSantosh Shilimkar * 138426f09e9bSSantosh Shilimkar * Public panicking version of _memblock_virt_alloc_try_nid_nopanic() 138526f09e9bSSantosh Shilimkar * which provides debug information (including caller info), if enabled, 138626f09e9bSSantosh Shilimkar * and panics if the request can not be satisfied. 138726f09e9bSSantosh Shilimkar * 138826f09e9bSSantosh Shilimkar * RETURNS: 138926f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 139026f09e9bSSantosh Shilimkar */ 139126f09e9bSSantosh Shilimkar void * __init memblock_virt_alloc_try_nid( 139226f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 139326f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 139426f09e9bSSantosh Shilimkar int nid) 139526f09e9bSSantosh Shilimkar { 139626f09e9bSSantosh Shilimkar void *ptr; 139726f09e9bSSantosh Shilimkar 139826f09e9bSSantosh Shilimkar memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", 139926f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 140026f09e9bSSantosh Shilimkar (u64)max_addr, (void *)_RET_IP_); 140126f09e9bSSantosh Shilimkar ptr = memblock_virt_alloc_internal(size, align, 140226f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 140326f09e9bSSantosh Shilimkar if (ptr) 140426f09e9bSSantosh Shilimkar return ptr; 140526f09e9bSSantosh Shilimkar 140626f09e9bSSantosh Shilimkar panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", 140726f09e9bSSantosh Shilimkar __func__, (u64)size, (u64)align, nid, (u64)min_addr, 140826f09e9bSSantosh Shilimkar (u64)max_addr); 140926f09e9bSSantosh Shilimkar return NULL; 141026f09e9bSSantosh Shilimkar } 141126f09e9bSSantosh Shilimkar 141226f09e9bSSantosh Shilimkar /** 141326f09e9bSSantosh Shilimkar * __memblock_free_early - free boot memory block 141426f09e9bSSantosh Shilimkar * @base: phys starting address of the boot memory block 141526f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 141626f09e9bSSantosh Shilimkar * 141726f09e9bSSantosh Shilimkar * Free boot memory block previously allocated by memblock_virt_alloc_xx() API. 141826f09e9bSSantosh Shilimkar * The freeing memory will not be released to the buddy allocator. 141926f09e9bSSantosh Shilimkar */ 142026f09e9bSSantosh Shilimkar void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) 142126f09e9bSSantosh Shilimkar { 142226f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 142326f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 142426f09e9bSSantosh Shilimkar (void *)_RET_IP_); 14259099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 1426f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, base, size); 142726f09e9bSSantosh Shilimkar } 142826f09e9bSSantosh Shilimkar 142926f09e9bSSantosh Shilimkar /* 143026f09e9bSSantosh Shilimkar * __memblock_free_late - free bootmem block pages directly to buddy allocator 143126f09e9bSSantosh Shilimkar * @addr: phys starting address of the boot memory block 143226f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 143326f09e9bSSantosh Shilimkar * 143426f09e9bSSantosh Shilimkar * This is only useful when the bootmem allocator has already been torn 143526f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 143626f09e9bSSantosh Shilimkar * to the buddy allocator, no bootmem metadata is updated because it is gone. 143726f09e9bSSantosh Shilimkar */ 143826f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 143926f09e9bSSantosh Shilimkar { 144026f09e9bSSantosh Shilimkar u64 cursor, end; 144126f09e9bSSantosh Shilimkar 144226f09e9bSSantosh Shilimkar memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", 144326f09e9bSSantosh Shilimkar __func__, (u64)base, (u64)base + size - 1, 144426f09e9bSSantosh Shilimkar (void *)_RET_IP_); 14459099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 144626f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 144726f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 144826f09e9bSSantosh Shilimkar 144926f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 1450d70ddd7aSMel Gorman __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); 145126f09e9bSSantosh Shilimkar totalram_pages++; 145226f09e9bSSantosh Shilimkar } 145326f09e9bSSantosh Shilimkar } 14549d1e2492SBenjamin Herrenschmidt 14559d1e2492SBenjamin Herrenschmidt /* 14569d1e2492SBenjamin Herrenschmidt * Remaining API functions 14579d1e2492SBenjamin Herrenschmidt */ 14589d1e2492SBenjamin Herrenschmidt 14591f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 146095f72d1eSYinghai Lu { 14611440c4e2STejun Heo return memblock.memory.total_size; 146295f72d1eSYinghai Lu } 146395f72d1eSYinghai Lu 14648907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 14658907de5dSSrikar Dronamraju { 14668907de5dSSrikar Dronamraju return memblock.reserved.total_size; 14678907de5dSSrikar Dronamraju } 14688907de5dSSrikar Dronamraju 1469595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1470595ad9afSYinghai Lu { 1471595ad9afSYinghai Lu unsigned long pages = 0; 1472595ad9afSYinghai Lu struct memblock_region *r; 1473595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1474595ad9afSYinghai Lu 1475595ad9afSYinghai Lu for_each_memblock(memory, r) { 1476595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1477595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1478595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1479595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1480595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1481595ad9afSYinghai Lu } 1482595ad9afSYinghai Lu 148316763230SFabian Frederick return PFN_PHYS(pages); 1484595ad9afSYinghai Lu } 1485595ad9afSYinghai Lu 14860a93ebefSSam Ravnborg /* lowest address */ 14870a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 14880a93ebefSSam Ravnborg { 14890a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 14900a93ebefSSam Ravnborg } 14910a93ebefSSam Ravnborg 149210d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 149395f72d1eSYinghai Lu { 149495f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 149595f72d1eSYinghai Lu 1496e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 149795f72d1eSYinghai Lu } 149895f72d1eSYinghai Lu 1499a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 150095f72d1eSYinghai Lu { 1501c0ce8fefSTejun Heo phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1502136199f0SEmil Medve struct memblock_region *r; 150395f72d1eSYinghai Lu 1504a571d4ebSDennis Chen /* 1505a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1506a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 1507a571d4ebSDennis Chen * of those regions, max_addr will keep original value ULLONG_MAX 1508a571d4ebSDennis Chen */ 1509136199f0SEmil Medve for_each_memblock(memory, r) { 1510c0ce8fefSTejun Heo if (limit <= r->size) { 1511c0ce8fefSTejun Heo max_addr = r->base + limit; 151295f72d1eSYinghai Lu break; 151395f72d1eSYinghai Lu } 1514c0ce8fefSTejun Heo limit -= r->size; 151595f72d1eSYinghai Lu } 1516c0ce8fefSTejun Heo 1517a571d4ebSDennis Chen return max_addr; 1518a571d4ebSDennis Chen } 1519a571d4ebSDennis Chen 1520a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1521a571d4ebSDennis Chen { 1522a571d4ebSDennis Chen phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; 1523a571d4ebSDennis Chen 1524a571d4ebSDennis Chen if (!limit) 1525a571d4ebSDennis Chen return; 1526a571d4ebSDennis Chen 1527a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1528a571d4ebSDennis Chen 1529a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 1530a571d4ebSDennis Chen if (max_addr == (phys_addr_t)ULLONG_MAX) 1531a571d4ebSDennis Chen return; 1532a571d4ebSDennis Chen 1533c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1534f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 1535f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 1536f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 1537f1af9d3aSPhilipp Hachtmann (phys_addr_t)ULLONG_MAX); 153895f72d1eSYinghai Lu } 153995f72d1eSYinghai Lu 1540a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1541a571d4ebSDennis Chen { 1542a571d4ebSDennis Chen struct memblock_type *type = &memblock.memory; 1543a571d4ebSDennis Chen phys_addr_t max_addr; 1544a571d4ebSDennis Chen int i, ret, start_rgn, end_rgn; 1545a571d4ebSDennis Chen 1546a571d4ebSDennis Chen if (!limit) 1547a571d4ebSDennis Chen return; 1548a571d4ebSDennis Chen 1549a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1550a571d4ebSDennis Chen 1551a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 1552a571d4ebSDennis Chen if (max_addr == (phys_addr_t)ULLONG_MAX) 1553a571d4ebSDennis Chen return; 1554a571d4ebSDennis Chen 1555a571d4ebSDennis Chen ret = memblock_isolate_range(type, max_addr, (phys_addr_t)ULLONG_MAX, 1556a571d4ebSDennis Chen &start_rgn, &end_rgn); 1557a571d4ebSDennis Chen if (ret) 1558a571d4ebSDennis Chen return; 1559a571d4ebSDennis Chen 1560a571d4ebSDennis Chen /* remove all the MAP regions above the limit */ 1561a571d4ebSDennis Chen for (i = end_rgn - 1; i >= start_rgn; i--) { 1562a571d4ebSDennis Chen if (!memblock_is_nomap(&type->regions[i])) 1563a571d4ebSDennis Chen memblock_remove_region(type, i); 1564a571d4ebSDennis Chen } 1565a571d4ebSDennis Chen /* truncate the reserved regions */ 1566a571d4ebSDennis Chen memblock_remove_range(&memblock.reserved, max_addr, 1567a571d4ebSDennis Chen (phys_addr_t)ULLONG_MAX); 1568a571d4ebSDennis Chen } 1569a571d4ebSDennis Chen 1570cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 157172d4b0b4SBenjamin Herrenschmidt { 157272d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 157372d4b0b4SBenjamin Herrenschmidt 157472d4b0b4SBenjamin Herrenschmidt do { 157572d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 157672d4b0b4SBenjamin Herrenschmidt 157772d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 157872d4b0b4SBenjamin Herrenschmidt right = mid; 157972d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 158072d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 158172d4b0b4SBenjamin Herrenschmidt left = mid + 1; 158272d4b0b4SBenjamin Herrenschmidt else 158372d4b0b4SBenjamin Herrenschmidt return mid; 158472d4b0b4SBenjamin Herrenschmidt } while (left < right); 158572d4b0b4SBenjamin Herrenschmidt return -1; 158672d4b0b4SBenjamin Herrenschmidt } 158772d4b0b4SBenjamin Herrenschmidt 1588b4ad0c7eSYaowei Bai bool __init memblock_is_reserved(phys_addr_t addr) 158995f72d1eSYinghai Lu { 159072d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 159195f72d1eSYinghai Lu } 159272d4b0b4SBenjamin Herrenschmidt 1593b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 159472d4b0b4SBenjamin Herrenschmidt { 159572d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 159672d4b0b4SBenjamin Herrenschmidt } 159772d4b0b4SBenjamin Herrenschmidt 1598bf3d3cc5SArd Biesheuvel int __init_memblock memblock_is_map_memory(phys_addr_t addr) 1599bf3d3cc5SArd Biesheuvel { 1600bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1601bf3d3cc5SArd Biesheuvel 1602bf3d3cc5SArd Biesheuvel if (i == -1) 1603bf3d3cc5SArd Biesheuvel return false; 1604bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1605bf3d3cc5SArd Biesheuvel } 1606bf3d3cc5SArd Biesheuvel 1607e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1608e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1609e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1610e76b63f8SYinghai Lu { 1611e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 161216763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1613e76b63f8SYinghai Lu 1614e76b63f8SYinghai Lu if (mid == -1) 1615e76b63f8SYinghai Lu return -1; 1616e76b63f8SYinghai Lu 1617f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1618f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1619e76b63f8SYinghai Lu 1620e76b63f8SYinghai Lu return type->regions[mid].nid; 1621e76b63f8SYinghai Lu } 1622e76b63f8SYinghai Lu #endif 1623e76b63f8SYinghai Lu 1624eab30949SStephen Boyd /** 1625eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1626eab30949SStephen Boyd * @base: base of region to check 1627eab30949SStephen Boyd * @size: size of region to check 1628eab30949SStephen Boyd * 1629eab30949SStephen Boyd * Check if the region [@base, @base+@size) is a subset of a memory block. 1630eab30949SStephen Boyd * 1631eab30949SStephen Boyd * RETURNS: 1632eab30949SStephen Boyd * 0 if false, non-zero if true 1633eab30949SStephen Boyd */ 16343661ca66SYinghai Lu int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 163572d4b0b4SBenjamin Herrenschmidt { 1636abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1637eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 163872d4b0b4SBenjamin Herrenschmidt 163972d4b0b4SBenjamin Herrenschmidt if (idx == -1) 164095f72d1eSYinghai Lu return 0; 1641ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1642eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 164395f72d1eSYinghai Lu } 164495f72d1eSYinghai Lu 1645eab30949SStephen Boyd /** 1646eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1647eab30949SStephen Boyd * @base: base of region to check 1648eab30949SStephen Boyd * @size: size of region to check 1649eab30949SStephen Boyd * 1650eab30949SStephen Boyd * Check if the region [@base, @base+@size) intersects a reserved memory block. 1651eab30949SStephen Boyd * 1652eab30949SStephen Boyd * RETURNS: 1653c5c5c9d1STang Chen * True if they intersect, false if not. 1654eab30949SStephen Boyd */ 1655c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 165695f72d1eSYinghai Lu { 1657eb18f1b5STejun Heo memblock_cap_size(base, &size); 1658c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 165995f72d1eSYinghai Lu } 166095f72d1eSYinghai Lu 16616ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 16626ede1fd3SYinghai Lu { 16636ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1664136199f0SEmil Medve struct memblock_region *r; 16656ede1fd3SYinghai Lu 1666136199f0SEmil Medve for_each_memblock(memory, r) { 1667136199f0SEmil Medve orig_start = r->base; 1668136199f0SEmil Medve orig_end = r->base + r->size; 16696ede1fd3SYinghai Lu start = round_up(orig_start, align); 16706ede1fd3SYinghai Lu end = round_down(orig_end, align); 16716ede1fd3SYinghai Lu 16726ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 16736ede1fd3SYinghai Lu continue; 16746ede1fd3SYinghai Lu 16756ede1fd3SYinghai Lu if (start < end) { 1676136199f0SEmil Medve r->base = start; 1677136199f0SEmil Medve r->size = end - start; 16786ede1fd3SYinghai Lu } else { 1679136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1680136199f0SEmil Medve r - memblock.memory.regions); 1681136199f0SEmil Medve r--; 16826ede1fd3SYinghai Lu } 16836ede1fd3SYinghai Lu } 16846ede1fd3SYinghai Lu } 1685e63075a3SBenjamin Herrenschmidt 16863661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1687e63075a3SBenjamin Herrenschmidt { 1688e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1689e63075a3SBenjamin Herrenschmidt } 1690e63075a3SBenjamin Herrenschmidt 1691fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1692fec51014SLaura Abbott { 1693fec51014SLaura Abbott return memblock.current_limit; 1694fec51014SLaura Abbott } 1695fec51014SLaura Abbott 16967c0caeb8STejun Heo static void __init_memblock memblock_dump(struct memblock_type *type, char *name) 16976ed311b2SBenjamin Herrenschmidt { 1698*5d63f81cSMiles Chen phys_addr_t base, end, size; 169966a20757STang Chen unsigned long flags; 17008c9c1701SAlexander Kuleshov int idx; 17018c9c1701SAlexander Kuleshov struct memblock_region *rgn; 17026ed311b2SBenjamin Herrenschmidt 17037c0caeb8STejun Heo pr_info(" %s.cnt = 0x%lx\n", name, type->cnt); 17046ed311b2SBenjamin Herrenschmidt 17058c9c1701SAlexander Kuleshov for_each_memblock_type(type, rgn) { 17067c0caeb8STejun Heo char nid_buf[32] = ""; 17076ed311b2SBenjamin Herrenschmidt 17087c0caeb8STejun Heo base = rgn->base; 17097c0caeb8STejun Heo size = rgn->size; 1710*5d63f81cSMiles Chen end = base + size - 1; 171166a20757STang Chen flags = rgn->flags; 17127c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 17137c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 17147c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 17157c0caeb8STejun Heo memblock_get_region_node(rgn)); 17167c0caeb8STejun Heo #endif 1717*5d63f81cSMiles Chen pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#lx\n", 1718*5d63f81cSMiles Chen name, idx, &base, &end, &size, nid_buf, flags); 17196ed311b2SBenjamin Herrenschmidt } 17206ed311b2SBenjamin Herrenschmidt } 17216ed311b2SBenjamin Herrenschmidt 17224ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 17236ed311b2SBenjamin Herrenschmidt { 17246ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 1725*5d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 1726*5d63f81cSMiles Chen &memblock.memory.total_size, 1727*5d63f81cSMiles Chen &memblock.reserved.total_size); 17286ed311b2SBenjamin Herrenschmidt 17296ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.memory, "memory"); 17306ed311b2SBenjamin Herrenschmidt memblock_dump(&memblock.reserved, "reserved"); 17316ed311b2SBenjamin Herrenschmidt } 17326ed311b2SBenjamin Herrenschmidt 17331aadc056STejun Heo void __init memblock_allow_resize(void) 17346ed311b2SBenjamin Herrenschmidt { 1735142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 17366ed311b2SBenjamin Herrenschmidt } 17376ed311b2SBenjamin Herrenschmidt 17386ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 17396ed311b2SBenjamin Herrenschmidt { 17406ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 17416ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 17426ed311b2SBenjamin Herrenschmidt return 0; 17436ed311b2SBenjamin Herrenschmidt } 17446ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 17456ed311b2SBenjamin Herrenschmidt 1746c378ddd5STejun Heo #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK) 17476d03b885SBenjamin Herrenschmidt 17486d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 17496d03b885SBenjamin Herrenschmidt { 17506d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 17516d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 17526d03b885SBenjamin Herrenschmidt int i; 1753*5d63f81cSMiles Chen phys_addr_t end; 17546d03b885SBenjamin Herrenschmidt 17556d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 17566d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 1757*5d63f81cSMiles Chen end = reg->base + reg->size - 1; 17586d03b885SBenjamin Herrenschmidt 1759*5d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 1760*5d63f81cSMiles Chen seq_printf(m, "%pa..%pa\n", ®->base, &end); 17616d03b885SBenjamin Herrenschmidt } 17626d03b885SBenjamin Herrenschmidt return 0; 17636d03b885SBenjamin Herrenschmidt } 17646d03b885SBenjamin Herrenschmidt 17656d03b885SBenjamin Herrenschmidt static int memblock_debug_open(struct inode *inode, struct file *file) 17666d03b885SBenjamin Herrenschmidt { 17676d03b885SBenjamin Herrenschmidt return single_open(file, memblock_debug_show, inode->i_private); 17686d03b885SBenjamin Herrenschmidt } 17696d03b885SBenjamin Herrenschmidt 17706d03b885SBenjamin Herrenschmidt static const struct file_operations memblock_debug_fops = { 17716d03b885SBenjamin Herrenschmidt .open = memblock_debug_open, 17726d03b885SBenjamin Herrenschmidt .read = seq_read, 17736d03b885SBenjamin Herrenschmidt .llseek = seq_lseek, 17746d03b885SBenjamin Herrenschmidt .release = single_release, 17756d03b885SBenjamin Herrenschmidt }; 17766d03b885SBenjamin Herrenschmidt 17776d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 17786d03b885SBenjamin Herrenschmidt { 17796d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 17806d03b885SBenjamin Herrenschmidt if (!root) 17816d03b885SBenjamin Herrenschmidt return -ENXIO; 17826d03b885SBenjamin Herrenschmidt debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); 17836d03b885SBenjamin Herrenschmidt debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); 178470210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 178570210ed9SPhilipp Hachtmann debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); 178670210ed9SPhilipp Hachtmann #endif 17876d03b885SBenjamin Herrenschmidt 17886d03b885SBenjamin Herrenschmidt return 0; 17896d03b885SBenjamin Herrenschmidt } 17906d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 17916d03b885SBenjamin Herrenschmidt 17926d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 1793