Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 1 | /* |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame^] | 2 | * AMD NUMA support. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Discover the memory map and associated nodes. |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 4 | * |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame^] | 5 | * This version reads it directly from the AMD northbridge. |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Copyright 2002,2003 Andi Kleen, SuSE Labs. |
| 8 | */ |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/string.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/nodemask.h> |
Yinghai Lu | a9ce6bc | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 14 | #include <linux/memblock.h> |
| 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <asm/io.h> |
| 17 | #include <linux/pci_ids.h> |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 18 | #include <linux/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <asm/types.h> |
| 20 | #include <asm/mmzone.h> |
| 21 | #include <asm/proto.h> |
| 22 | #include <asm/e820.h> |
| 23 | #include <asm/pci-direct.h> |
| 24 | #include <asm/numa.h> |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 25 | #include <asm/mpspec.h> |
| 26 | #include <asm/apic.h> |
Andreas Herrmann | 23ac4ae | 2010-09-17 18:03:43 +0200 | [diff] [blame] | 27 | #include <asm/amd_nb.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 29 | static struct bootnode __initdata nodes[8]; |
| 30 | static nodemask_t __initdata nodes_parsed = NODE_MASK_NONE; |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | static __init int find_northbridge(void) |
| 33 | { |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 34 | int num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 36 | for (num = 0; num < 32; num++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | u32 header; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 38 | |
| 39 | header = read_pci_config(0, num, 0, 0x00); |
Joachim Deguara | bb4a1d6 | 2008-01-30 13:34:12 +0100 | [diff] [blame] | 40 | if (header != (PCI_VENDOR_ID_AMD | (0x1100<<16)) && |
| 41 | header != (PCI_VENDOR_ID_AMD | (0x1200<<16)) && |
| 42 | header != (PCI_VENDOR_ID_AMD | (0x1300<<16))) |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 43 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 45 | header = read_pci_config(0, num, 1, 0x00); |
Joachim Deguara | bb4a1d6 | 2008-01-30 13:34:12 +0100 | [diff] [blame] | 46 | if (header != (PCI_VENDOR_ID_AMD | (0x1101<<16)) && |
| 47 | header != (PCI_VENDOR_ID_AMD | (0x1201<<16)) && |
| 48 | header != (PCI_VENDOR_ID_AMD | (0x1301<<16))) |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 49 | continue; |
| 50 | return num; |
| 51 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 53 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | } |
| 55 | |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 56 | static __init void early_get_boot_cpu_id(void) |
| 57 | { |
| 58 | /* |
Robert Richter | f6e9456c | 2010-07-21 19:03:58 +0200 | [diff] [blame] | 59 | * need to get the APIC ID of the BSP so can use that to |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame^] | 60 | * create apicid_to_node in amd_scan_nodes() |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 61 | */ |
Yinghai Lu | a4caa18 | 2008-06-19 12:15:01 -0700 | [diff] [blame] | 62 | #ifdef CONFIG_X86_MPPARSE |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 63 | /* |
| 64 | * get boot-time SMP configuration: |
| 65 | */ |
| 66 | if (smp_found_config) |
| 67 | early_get_smp_config(); |
Yinghai Lu | a4caa18 | 2008-06-19 12:15:01 -0700 | [diff] [blame] | 68 | #endif |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 69 | early_init_lapic_mapping(); |
| 70 | } |
| 71 | |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame^] | 72 | int __init amd_get_nodes(struct bootnode *physnodes) |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 73 | { |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 74 | int i; |
| 75 | int ret = 0; |
| 76 | |
| 77 | for_each_node_mask(i, nodes_parsed) { |
| 78 | physnodes[ret].start = nodes[i].start; |
| 79 | physnodes[ret].end = nodes[i].end; |
| 80 | ret++; |
| 81 | } |
| 82 | return ret; |
| 83 | } |
| 84 | |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame^] | 85 | int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn) |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 86 | { |
| 87 | unsigned long start = PFN_PHYS(start_pfn); |
| 88 | unsigned long end = PFN_PHYS(end_pfn); |
| 89 | unsigned numnodes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | unsigned long prevbase; |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 91 | int i, nb, found = 0; |
Thomas Gleixner | d34c089 | 2008-05-12 15:43:35 +0200 | [diff] [blame] | 92 | u32 nodeid, reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Andi Kleen | 0637a70 | 2006-09-26 10:52:41 +0200 | [diff] [blame] | 94 | if (!early_pci_allowed()) |
| 95 | return -1; |
| 96 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 97 | nb = find_northbridge(); |
| 98 | if (nb < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | return nb; |
| 100 | |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 101 | pr_info("Scanning NUMA topology in Northbridge %d\n", nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 103 | reg = read_pci_config(0, nb, 0, 0x60); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | numnodes = ((reg >> 4) & 0xF) + 1; |
Andi Kleen | 3bea9c9 | 2007-05-02 19:27:21 +0200 | [diff] [blame] | 105 | if (numnodes <= 1) |
| 106 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 108 | pr_info("Number of physical nodes %d\n", numnodes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | prevbase = 0; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 111 | for (i = 0; i < 8; i++) { |
| 112 | unsigned long base, limit; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | base = read_pci_config(0, nb, 1, 0x40 + i*8); |
| 115 | limit = read_pci_config(0, nb, 1, 0x44 + i*8); |
| 116 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 117 | nodeid = limit & 7; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 118 | if ((base & 3) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | if (i < numnodes) |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 120 | pr_info("Skipping disabled node %d\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | continue; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | if (nodeid >= numnodes) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 124 | pr_info("Ignoring excess node %d (%lx:%lx)\n", nodeid, |
| 125 | base, limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | continue; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 127 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 129 | if (!limit) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 130 | pr_info("Skipping node entry %d (base %lx)\n", |
| 131 | i, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | continue; |
| 133 | } |
| 134 | if ((base >> 8) & 3 || (limit >> 8) & 3) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 135 | pr_err("Node %d using interleaving mode %lx/%lx\n", |
| 136 | nodeid, (base >> 8) & 3, (limit >> 8) & 3); |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 137 | return -1; |
| 138 | } |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 139 | if (node_isset(nodeid, nodes_parsed)) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 140 | pr_info("Node %d already present, skipping\n", |
| 141 | nodeid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | continue; |
| 143 | } |
| 144 | |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 145 | limit >>= 16; |
| 146 | limit <<= 24; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | limit |= (1<<24)-1; |
Magnus Damm | ffd10a2 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 148 | limit++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 150 | if (limit > end) |
| 151 | limit = end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (limit <= base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | continue; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 154 | |
| 155 | base >>= 16; |
| 156 | base <<= 24; |
| 157 | |
| 158 | if (base < start) |
| 159 | base = start; |
| 160 | if (limit > end) |
| 161 | limit = end; |
| 162 | if (limit == base) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 163 | pr_err("Empty node %d\n", nodeid); |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 164 | continue; |
| 165 | } |
| 166 | if (limit < base) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 167 | pr_err("Node %d bogus settings %lx-%lx.\n", |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 168 | nodeid, base, limit); |
| 169 | continue; |
| 170 | } |
| 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | /* Could sort here, but pun for now. Should not happen anyroads. */ |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 173 | if (prevbase > base) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 174 | pr_err("Node map not sorted %lx,%lx\n", |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 175 | prevbase, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return -1; |
| 177 | } |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 178 | |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 179 | pr_info("Node %d MemBase %016lx Limit %016lx\n", |
| 180 | nodeid, base, limit); |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | found++; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 183 | |
| 184 | nodes[nodeid].start = base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | nodes[nodeid].end = limit; |
| 186 | |
| 187 | prevbase = base; |
| 188 | |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 189 | node_set(nodeid, nodes_parsed); |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 190 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | if (!found) |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 193 | return -1; |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 194 | return 0; |
| 195 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame^] | 197 | int __init amd_scan_nodes(void) |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 198 | { |
| 199 | unsigned int bits; |
| 200 | unsigned int cores; |
| 201 | unsigned int apicid_base; |
| 202 | int i; |
| 203 | |
| 204 | BUG_ON(nodes_empty(nodes_parsed)); |
| 205 | node_possible_map = nodes_parsed; |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 206 | memnode_shift = compute_hash_shift(nodes, 8, NULL); |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 207 | if (memnode_shift < 0) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 208 | pr_err("No NUMA node hash function found. Contact maintainer\n"); |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 209 | return -1; |
| 210 | } |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 211 | pr_info("Using node hash shift of %d\n", memnode_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
Yinghai Lu | 3f6e5a1 | 2008-01-30 13:30:39 +0100 | [diff] [blame] | 213 | /* use the coreid bits from early_identify_cpu */ |
| 214 | bits = boot_cpu_data.x86_coreid_bits; |
| 215 | cores = (1<<bits); |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 216 | apicid_base = 0; |
Robert Richter | f6e9456c | 2010-07-21 19:03:58 +0200 | [diff] [blame] | 217 | /* get the APIC ID of the BSP early for systems with apicid lifting */ |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 218 | early_get_boot_cpu_id(); |
| 219 | if (boot_cpu_physical_apicid > 0) { |
David Rientjes | 1af5ba5 | 2009-09-25 15:19:47 -0700 | [diff] [blame] | 220 | pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid); |
Yinghai Lu | cbf9bd6 | 2008-02-19 03:21:06 -0800 | [diff] [blame] | 221 | apicid_base = boot_cpu_physical_apicid; |
| 222 | } |
Yinghai Lu | 3f6e5a1 | 2008-01-30 13:30:39 +0100 | [diff] [blame] | 223 | |
David Rientjes | 8ee2deb | 2009-09-25 15:20:00 -0700 | [diff] [blame] | 224 | for_each_node_mask(i, node_possible_map) { |
| 225 | int j; |
Yinghai Lu | 40bcc69 | 2009-01-05 18:39:01 -0800 | [diff] [blame] | 226 | |
Yinghai Lu | a9ce6bc | 2010-08-25 13:39:17 -0700 | [diff] [blame] | 227 | memblock_x86_register_active_regions(i, |
Yinghai Lu | 40bcc69 | 2009-01-05 18:39:01 -0800 | [diff] [blame] | 228 | nodes[i].start >> PAGE_SHIFT, |
| 229 | nodes[i].end >> PAGE_SHIFT); |
| 230 | for (j = apicid_base; j < cores + apicid_base; j++) |
| 231 | apicid_to_node[(i << bits) + j] = i; |
| 232 | setup_node_bootmem(i, nodes[i].start, nodes[i].end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | numa_init_array(); |
| 236 | return 0; |
Carlos R. Mafra | 3aa88cd | 2008-01-30 13:32:36 +0100 | [diff] [blame] | 237 | } |