1 /*- 2 * Copyright (c) 2010 Advanced Computing Technologies LLC 3 * Written by: John H. Baldwin <jhb@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/lock.h> 35 #include <sys/mutex.h> 36 #include <sys/smp.h> 37 #include <sys/vmmeter.h> 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 #include <vm/vm_param.h> 41 #include <vm/vm_page.h> 42 #include <vm/vm_phys.h> 43 44 #include <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/actables.h> 46 47 #include <machine/intr_machdep.h> 48 #include <x86/apicvar.h> 49 50 #include <dev/acpica/acpivar.h> 51 52 #if MAXMEMDOM > 1 53 struct cpu_info { 54 int enabled:1; 55 int has_memory:1; 56 int domain; 57 } cpus[MAX_APIC_ID + 1]; 58 59 struct mem_affinity mem_info[VM_PHYSSEG_MAX + 1]; 60 int num_mem; 61 62 static ACPI_TABLE_SRAT *srat; 63 static vm_paddr_t srat_physaddr; 64 65 static int vm_domains[VM_PHYSSEG_MAX]; 66 67 static void srat_walk_table(acpi_subtable_handler *handler, void *arg); 68 69 /* 70 * Returns true if a memory range overlaps with at least one range in 71 * phys_avail[]. 72 */ 73 static int 74 overlaps_phys_avail(vm_paddr_t start, vm_paddr_t end) 75 { 76 int i; 77 78 for (i = 0; phys_avail[i] != 0 && phys_avail[i + 1] != 0; i += 2) { 79 if (phys_avail[i + 1] < start) 80 continue; 81 if (phys_avail[i] < end) 82 return (1); 83 break; 84 } 85 return (0); 86 87 } 88 89 static void 90 srat_parse_entry(ACPI_SUBTABLE_HEADER *entry, void *arg) 91 { 92 ACPI_SRAT_CPU_AFFINITY *cpu; 93 ACPI_SRAT_X2APIC_CPU_AFFINITY *x2apic; 94 ACPI_SRAT_MEM_AFFINITY *mem; 95 int domain, i, slot; 96 97 switch (entry->Type) { 98 case ACPI_SRAT_TYPE_CPU_AFFINITY: 99 cpu = (ACPI_SRAT_CPU_AFFINITY *)entry; 100 domain = cpu->ProximityDomainLo | 101 cpu->ProximityDomainHi[0] << 8 | 102 cpu->ProximityDomainHi[1] << 16 | 103 cpu->ProximityDomainHi[2] << 24; 104 if (bootverbose) 105 printf("SRAT: Found CPU APIC ID %u domain %d: %s\n", 106 cpu->ApicId, domain, 107 (cpu->Flags & ACPI_SRAT_CPU_ENABLED) ? 108 "enabled" : "disabled"); 109 if (!(cpu->Flags & ACPI_SRAT_CPU_ENABLED)) 110 break; 111 KASSERT(!cpus[cpu->ApicId].enabled, 112 ("Duplicate local APIC ID %u", cpu->ApicId)); 113 cpus[cpu->ApicId].domain = domain; 114 cpus[cpu->ApicId].enabled = 1; 115 break; 116 case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY: 117 x2apic = (ACPI_SRAT_X2APIC_CPU_AFFINITY *)entry; 118 if (bootverbose) 119 printf("SRAT: Found CPU APIC ID %u domain %d: %s\n", 120 x2apic->ApicId, x2apic->ProximityDomain, 121 (x2apic->Flags & ACPI_SRAT_CPU_ENABLED) ? 122 "enabled" : "disabled"); 123 if (!(x2apic->Flags & ACPI_SRAT_CPU_ENABLED)) 124 break; 125 KASSERT(!cpus[x2apic->ApicId].enabled, 126 ("Duplicate local APIC ID %u", x2apic->ApicId)); 127 cpus[x2apic->ApicId].domain = x2apic->ProximityDomain; 128 cpus[x2apic->ApicId].enabled = 1; 129 break; 130 case ACPI_SRAT_TYPE_MEMORY_AFFINITY: 131 mem = (ACPI_SRAT_MEM_AFFINITY *)entry; 132 if (bootverbose) 133 printf( 134 "SRAT: Found memory domain %d addr %jx len %jx: %s\n", 135 mem->ProximityDomain, (uintmax_t)mem->BaseAddress, 136 (uintmax_t)mem->Length, 137 (mem->Flags & ACPI_SRAT_MEM_ENABLED) ? 138 "enabled" : "disabled"); 139 if (!(mem->Flags & ACPI_SRAT_MEM_ENABLED)) 140 break; 141 if (!overlaps_phys_avail(mem->BaseAddress, 142 mem->BaseAddress + mem->Length)) { 143 printf("SRAT: Ignoring memory at addr %jx\n", 144 (uintmax_t)mem->BaseAddress); 145 break; 146 } 147 if (num_mem == VM_PHYSSEG_MAX) { 148 printf("SRAT: Too many memory regions\n"); 149 *(int *)arg = ENXIO; 150 break; 151 } 152 slot = num_mem; 153 for (i = 0; i < num_mem; i++) { 154 if (mem_info[i].end <= mem->BaseAddress) 155 continue; 156 if (mem_info[i].start < 157 (mem->BaseAddress + mem->Length)) { 158 printf("SRAT: Overlapping memory entries\n"); 159 *(int *)arg = ENXIO; 160 return; 161 } 162 slot = i; 163 } 164 for (i = num_mem; i > slot; i--) 165 mem_info[i] = mem_info[i - 1]; 166 mem_info[slot].start = mem->BaseAddress; 167 mem_info[slot].end = mem->BaseAddress + mem->Length; 168 mem_info[slot].domain = mem->ProximityDomain; 169 num_mem++; 170 break; 171 } 172 } 173 174 /* 175 * Ensure each memory domain has at least one CPU and that each CPU 176 * has at least one memory domain. 177 */ 178 static int 179 check_domains(void) 180 { 181 int found, i, j; 182 183 for (i = 0; i < num_mem; i++) { 184 found = 0; 185 for (j = 0; j <= MAX_APIC_ID; j++) 186 if (cpus[j].enabled && 187 cpus[j].domain == mem_info[i].domain) { 188 cpus[j].has_memory = 1; 189 found++; 190 } 191 if (!found) { 192 printf("SRAT: No CPU found for memory domain %d\n", 193 mem_info[i].domain); 194 return (ENXIO); 195 } 196 } 197 for (i = 0; i <= MAX_APIC_ID; i++) 198 if (cpus[i].enabled && !cpus[i].has_memory) { 199 printf("SRAT: No memory found for CPU %d\n", i); 200 return (ENXIO); 201 } 202 return (0); 203 } 204 205 /* 206 * Check that the SRAT memory regions cover all of the regions in 207 * phys_avail[]. 208 */ 209 static int 210 check_phys_avail(void) 211 { 212 vm_paddr_t address; 213 int i, j; 214 215 /* j is the current offset into phys_avail[]. */ 216 address = phys_avail[0]; 217 j = 0; 218 for (i = 0; i < num_mem; i++) { 219 /* 220 * Consume as many phys_avail[] entries as fit in this 221 * region. 222 */ 223 while (address >= mem_info[i].start && 224 address <= mem_info[i].end) { 225 /* 226 * If we cover the rest of this phys_avail[] entry, 227 * advance to the next entry. 228 */ 229 if (phys_avail[j + 1] <= mem_info[i].end) { 230 j += 2; 231 if (phys_avail[j] == 0 && 232 phys_avail[j + 1] == 0) { 233 return (0); 234 } 235 address = phys_avail[j]; 236 } else 237 address = mem_info[i].end + 1; 238 } 239 } 240 printf("SRAT: No memory region found for %jx - %jx\n", 241 (uintmax_t)phys_avail[j], (uintmax_t)phys_avail[j + 1]); 242 return (ENXIO); 243 } 244 245 /* 246 * Renumber the memory domains to be compact and zero-based if not 247 * already. Returns an error if there are too many domains. 248 */ 249 static int 250 renumber_domains(void) 251 { 252 int i, j, slot; 253 254 /* Enumerate all the domains. */ 255 vm_ndomains = 0; 256 for (i = 0; i < num_mem; i++) { 257 /* See if this domain is already known. */ 258 for (j = 0; j < vm_ndomains; j++) { 259 if (vm_domains[j] >= mem_info[i].domain) 260 break; 261 } 262 if (j < vm_ndomains && vm_domains[j] == mem_info[i].domain) 263 continue; 264 265 /* Insert the new domain at slot 'j'. */ 266 slot = j; 267 for (j = vm_ndomains; j > slot; j--) 268 vm_domains[j] = vm_domains[j - 1]; 269 vm_domains[slot] = mem_info[i].domain; 270 vm_ndomains++; 271 if (vm_ndomains > MAXMEMDOM) { 272 vm_ndomains = 1; 273 printf("SRAT: Too many memory domains\n"); 274 return (EFBIG); 275 } 276 } 277 278 /* Renumber each domain to its index in the sorted 'domains' list. */ 279 for (i = 0; i < vm_ndomains; i++) { 280 /* 281 * If the domain is already the right value, no need 282 * to renumber. 283 */ 284 if (vm_domains[i] == i) 285 continue; 286 287 /* Walk the cpu[] and mem_info[] arrays to renumber. */ 288 for (j = 0; j < num_mem; j++) 289 if (mem_info[j].domain == vm_domains[i]) 290 mem_info[j].domain = i; 291 for (j = 0; j <= MAX_APIC_ID; j++) 292 if (cpus[j].enabled && cpus[j].domain == vm_domains[i]) 293 cpus[j].domain = i; 294 } 295 KASSERT(vm_ndomains > 0, 296 ("renumber_domains: invalid final vm_ndomains setup")); 297 298 return (0); 299 } 300 301 /* 302 * Look for an ACPI System Resource Affinity Table ("SRAT") 303 */ 304 static void 305 parse_srat(void *dummy) 306 { 307 int error; 308 309 if (resource_disabled("srat", 0)) 310 return; 311 312 srat_physaddr = acpi_find_table(ACPI_SIG_SRAT); 313 if (srat_physaddr == 0) 314 return; 315 316 /* 317 * Make a pass over the table to populate the cpus[] and 318 * mem_info[] tables. 319 */ 320 srat = acpi_map_table(srat_physaddr, ACPI_SIG_SRAT); 321 error = 0; 322 srat_walk_table(srat_parse_entry, &error); 323 acpi_unmap_table(srat); 324 srat = NULL; 325 if (error || check_domains() != 0 || check_phys_avail() != 0 || 326 renumber_domains() != 0) { 327 srat_physaddr = 0; 328 return; 329 } 330 331 /* Point vm_phys at our memory affinity table. */ 332 mem_affinity = mem_info; 333 } 334 SYSINIT(parse_srat, SI_SUB_VM - 1, SI_ORDER_FIRST, parse_srat, NULL); 335 336 static void 337 srat_walk_table(acpi_subtable_handler *handler, void *arg) 338 { 339 340 acpi_walk_subtables(srat + 1, (char *)srat + srat->Header.Length, 341 handler, arg); 342 } 343 344 /* 345 * Setup per-CPU ACPI IDs. 346 */ 347 static void 348 srat_set_cpus(void *dummy) 349 { 350 struct cpu_info *cpu; 351 struct pcpu *pc; 352 u_int i; 353 354 if (srat_physaddr == 0) 355 return; 356 for (i = 0; i < MAXCPU; i++) { 357 if (CPU_ABSENT(i)) 358 continue; 359 pc = pcpu_find(i); 360 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i)); 361 cpu = &cpus[pc->pc_apic_id]; 362 if (!cpu->enabled) 363 panic("SRAT: CPU with APIC ID %u is not known", 364 pc->pc_apic_id); 365 pc->pc_domain = cpu->domain; 366 if (bootverbose) 367 printf("SRAT: CPU %u has memory domain %d\n", i, 368 cpu->domain); 369 } 370 } 371 SYSINIT(srat_set_cpus, SI_SUB_CPU, SI_ORDER_ANY, srat_set_cpus, NULL); 372 373 /* 374 * Map a _PXM value to a VM domain ID. 375 * 376 * Returns the domain ID, or -1 if no domain ID was found. 377 */ 378 int 379 acpi_map_pxm_to_vm_domainid(int pxm) 380 { 381 int i; 382 383 for (i = 0; i < vm_ndomains; i++) { 384 if (vm_domains[i] == pxm) 385 return (i); 386 } 387 388 return (-1); 389 } 390 391 #endif /* MAXMEMDOM > 1 */ 392