1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * SGI UV APIC functions (note: not an Intel compatible APIC) 7 * 8 * Copyright (C) 2007-2014 Silicon Graphics, Inc. All rights reserved. 9 */ 10 #include <linux/cpumask.h> 11 #include <linux/hardirq.h> 12 #include <linux/proc_fs.h> 13 #include <linux/threads.h> 14 #include <linux/kernel.h> 15 #include <linux/export.h> 16 #include <linux/string.h> 17 #include <linux/ctype.h> 18 #include <linux/sched.h> 19 #include <linux/timer.h> 20 #include <linux/slab.h> 21 #include <linux/cpu.h> 22 #include <linux/init.h> 23 #include <linux/io.h> 24 #include <linux/pci.h> 25 #include <linux/kdebug.h> 26 #include <linux/delay.h> 27 #include <linux/crash_dump.h> 28 #include <linux/reboot.h> 29 30 #include <asm/uv/uv_mmrs.h> 31 #include <asm/uv/uv_hub.h> 32 #include <asm/current.h> 33 #include <asm/pgtable.h> 34 #include <asm/uv/bios.h> 35 #include <asm/uv/uv.h> 36 #include <asm/apic.h> 37 #include <asm/ipi.h> 38 #include <asm/smp.h> 39 #include <asm/x86_init.h> 40 #include <asm/nmi.h> 41 42 DEFINE_PER_CPU(int, x2apic_extra_bits); 43 44 #define PR_DEVEL(fmt, args...) pr_devel("%s: " fmt, __func__, args) 45 46 static enum uv_system_type uv_system_type; 47 static u64 gru_start_paddr, gru_end_paddr; 48 static u64 gru_dist_base, gru_first_node_paddr = -1LL, gru_last_node_paddr; 49 static u64 gru_dist_lmask, gru_dist_umask; 50 static union uvh_apicid uvh_apicid; 51 52 /* info derived from CPUID */ 53 static struct { 54 unsigned int apicid_shift; 55 unsigned int apicid_mask; 56 unsigned int socketid_shift; /* aka pnode_shift for UV1/2/3 */ 57 unsigned int pnode_mask; 58 unsigned int gpa_shift; 59 } uv_cpuid; 60 61 int uv_min_hub_revision_id; 62 EXPORT_SYMBOL_GPL(uv_min_hub_revision_id); 63 unsigned int uv_apicid_hibits; 64 EXPORT_SYMBOL_GPL(uv_apicid_hibits); 65 66 static struct apic apic_x2apic_uv_x; 67 static struct uv_hub_info_s uv_hub_info_node0; 68 69 /* Set this to use hardware error handler instead of kernel panic */ 70 static int disable_uv_undefined_panic = 1; 71 unsigned long uv_undefined(char *str) 72 { 73 if (likely(!disable_uv_undefined_panic)) 74 panic("UV: error: undefined MMR: %s\n", str); 75 else 76 pr_crit("UV: error: undefined MMR: %s\n", str); 77 return ~0ul; /* cause a machine fault */ 78 } 79 EXPORT_SYMBOL(uv_undefined); 80 81 static unsigned long __init uv_early_read_mmr(unsigned long addr) 82 { 83 unsigned long val, *mmr; 84 85 mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr)); 86 val = *mmr; 87 early_iounmap(mmr, sizeof(*mmr)); 88 return val; 89 } 90 91 static inline bool is_GRU_range(u64 start, u64 end) 92 { 93 if (gru_dist_base) { 94 u64 su = start & gru_dist_umask; /* upper (incl pnode) bits */ 95 u64 sl = start & gru_dist_lmask; /* base offset bits */ 96 u64 eu = end & gru_dist_umask; 97 u64 el = end & gru_dist_lmask; 98 99 /* Must reside completely within a single GRU range */ 100 return (sl == gru_dist_base && el == gru_dist_base && 101 su >= gru_first_node_paddr && 102 su <= gru_last_node_paddr && 103 eu == su); 104 } else { 105 return start >= gru_start_paddr && end <= gru_end_paddr; 106 } 107 } 108 109 static bool uv_is_untracked_pat_range(u64 start, u64 end) 110 { 111 return is_ISA_range(start, end) || is_GRU_range(start, end); 112 } 113 114 static int __init early_get_pnodeid(void) 115 { 116 union uvh_node_id_u node_id; 117 union uvh_rh_gam_config_mmr_u m_n_config; 118 int pnode; 119 120 /* Currently, all blades have same revision number */ 121 node_id.v = uv_early_read_mmr(UVH_NODE_ID); 122 m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR); 123 uv_min_hub_revision_id = node_id.s.revision; 124 125 switch (node_id.s.part_number) { 126 case UV2_HUB_PART_NUMBER: 127 case UV2_HUB_PART_NUMBER_X: 128 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1; 129 break; 130 case UV3_HUB_PART_NUMBER: 131 case UV3_HUB_PART_NUMBER_X: 132 uv_min_hub_revision_id += UV3_HUB_REVISION_BASE; 133 break; 134 case UV4_HUB_PART_NUMBER: 135 uv_min_hub_revision_id += UV4_HUB_REVISION_BASE - 1; 136 break; 137 } 138 139 uv_hub_info->hub_revision = uv_min_hub_revision_id; 140 uv_cpuid.pnode_mask = (1 << m_n_config.s.n_skt) - 1; 141 pnode = (node_id.s.node_id >> 1) & uv_cpuid.pnode_mask; 142 uv_cpuid.gpa_shift = 46; /* default unless changed */ 143 144 pr_info("UV: rev:%d part#:%x nodeid:%04x n_skt:%d pnmsk:%x pn:%x\n", 145 node_id.s.revision, node_id.s.part_number, node_id.s.node_id, 146 m_n_config.s.n_skt, uv_cpuid.pnode_mask, pnode); 147 return pnode; 148 } 149 150 /* [copied from arch/x86/kernel/cpu/topology.c:detect_extended_topology()] */ 151 #define SMT_LEVEL 0 /* leaf 0xb SMT level */ 152 #define INVALID_TYPE 0 /* leaf 0xb sub-leaf types */ 153 #define SMT_TYPE 1 154 #define CORE_TYPE 2 155 #define LEAFB_SUBTYPE(ecx) (((ecx) >> 8) & 0xff) 156 #define BITS_SHIFT_NEXT_LEVEL(eax) ((eax) & 0x1f) 157 158 static void set_x2apic_bits(void) 159 { 160 unsigned int eax, ebx, ecx, edx, sub_index; 161 unsigned int sid_shift; 162 163 cpuid(0, &eax, &ebx, &ecx, &edx); 164 if (eax < 0xb) { 165 pr_info("UV: CPU does not have CPUID.11\n"); 166 return; 167 } 168 cpuid_count(0xb, SMT_LEVEL, &eax, &ebx, &ecx, &edx); 169 if (ebx == 0 || (LEAFB_SUBTYPE(ecx) != SMT_TYPE)) { 170 pr_info("UV: CPUID.11 not implemented\n"); 171 return; 172 } 173 sid_shift = BITS_SHIFT_NEXT_LEVEL(eax); 174 sub_index = 1; 175 do { 176 cpuid_count(0xb, sub_index, &eax, &ebx, &ecx, &edx); 177 if (LEAFB_SUBTYPE(ecx) == CORE_TYPE) { 178 sid_shift = BITS_SHIFT_NEXT_LEVEL(eax); 179 break; 180 } 181 sub_index++; 182 } while (LEAFB_SUBTYPE(ecx) != INVALID_TYPE); 183 uv_cpuid.apicid_shift = 0; 184 uv_cpuid.apicid_mask = (~(-1 << sid_shift)); 185 uv_cpuid.socketid_shift = sid_shift; 186 } 187 188 static void __init early_get_apic_socketid_shift(void) 189 { 190 if (is_uv2_hub() || is_uv3_hub()) 191 uvh_apicid.v = uv_early_read_mmr(UVH_APICID); 192 193 set_x2apic_bits(); 194 195 pr_info("UV: apicid_shift:%d apicid_mask:0x%x\n", 196 uv_cpuid.apicid_shift, uv_cpuid.apicid_mask); 197 pr_info("UV: socketid_shift:%d pnode_mask:0x%x\n", 198 uv_cpuid.socketid_shift, uv_cpuid.pnode_mask); 199 } 200 201 /* 202 * Add an extra bit as dictated by bios to the destination apicid of 203 * interrupts potentially passing through the UV HUB. This prevents 204 * a deadlock between interrupts and IO port operations. 205 */ 206 static void __init uv_set_apicid_hibit(void) 207 { 208 union uv1h_lb_target_physical_apic_id_mask_u apicid_mask; 209 210 if (is_uv1_hub()) { 211 apicid_mask.v = 212 uv_early_read_mmr(UV1H_LB_TARGET_PHYSICAL_APIC_ID_MASK); 213 uv_apicid_hibits = 214 apicid_mask.s1.bit_enables & UV_APICID_HIBIT_MASK; 215 } 216 } 217 218 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 219 { 220 int pnodeid; 221 int uv_apic; 222 223 if (strncmp(oem_id, "SGI", 3) != 0) 224 return 0; 225 226 if (numa_off) { 227 pr_err("UV: NUMA is off, disabling UV support\n"); 228 return 0; 229 } 230 231 /* Setup early hub type field in uv_hub_info for Node 0 */ 232 uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0; 233 234 /* 235 * Determine UV arch type. 236 * SGI: UV100/1000 237 * SGI2: UV2000/3000 238 * SGI3: UV300 (truncated to 4 chars because of different varieties) 239 * SGI4: UV400 (truncated to 4 chars because of different varieties) 240 */ 241 uv_hub_info->hub_revision = 242 !strncmp(oem_id, "SGI4", 4) ? UV4_HUB_REVISION_BASE : 243 !strncmp(oem_id, "SGI3", 4) ? UV3_HUB_REVISION_BASE : 244 !strcmp(oem_id, "SGI2") ? UV2_HUB_REVISION_BASE : 245 !strcmp(oem_id, "SGI") ? UV1_HUB_REVISION_BASE : 0; 246 247 if (uv_hub_info->hub_revision == 0) 248 goto badbios; 249 250 pnodeid = early_get_pnodeid(); 251 early_get_apic_socketid_shift(); 252 x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range; 253 x86_platform.nmi_init = uv_nmi_init; 254 255 if (!strcmp(oem_table_id, "UVX")) { /* most common */ 256 uv_system_type = UV_X2APIC; 257 uv_apic = 0; 258 259 } else if (!strcmp(oem_table_id, "UVH")) { /* only UV1 systems */ 260 uv_system_type = UV_NON_UNIQUE_APIC; 261 __this_cpu_write(x2apic_extra_bits, 262 pnodeid << uvh_apicid.s.pnode_shift); 263 uv_set_apicid_hibit(); 264 uv_apic = 1; 265 266 } else if (!strcmp(oem_table_id, "UVL")) { /* only used for */ 267 uv_system_type = UV_LEGACY_APIC; /* very small systems */ 268 uv_apic = 0; 269 270 } else { 271 goto badbios; 272 } 273 274 pr_info("UV: OEM IDs %s/%s, System/HUB Types %d/%d, uv_apic %d\n", 275 oem_id, oem_table_id, uv_system_type, 276 uv_min_hub_revision_id, uv_apic); 277 278 return uv_apic; 279 280 badbios: 281 pr_err("UV: OEM_ID:%s OEM_TABLE_ID:%s\n", oem_id, oem_table_id); 282 pr_err("Current BIOS not supported, update kernel and/or BIOS\n"); 283 BUG(); 284 } 285 286 enum uv_system_type get_uv_system_type(void) 287 { 288 return uv_system_type; 289 } 290 291 int is_uv_system(void) 292 { 293 return uv_system_type != UV_NONE; 294 } 295 EXPORT_SYMBOL_GPL(is_uv_system); 296 297 void **__uv_hub_info_list; 298 EXPORT_SYMBOL_GPL(__uv_hub_info_list); 299 300 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info); 301 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info); 302 303 short uv_possible_blades; 304 EXPORT_SYMBOL_GPL(uv_possible_blades); 305 306 unsigned long sn_rtc_cycles_per_second; 307 EXPORT_SYMBOL(sn_rtc_cycles_per_second); 308 309 /* the following values are used for the per node hub info struct */ 310 static __initdata unsigned short *_node_to_pnode; 311 static __initdata unsigned short _min_socket, _max_socket; 312 static __initdata unsigned short _min_pnode, _max_pnode, _gr_table_len; 313 static __initdata struct uv_gam_range_entry *uv_gre_table; 314 static __initdata struct uv_gam_parameters *uv_gp_table; 315 static __initdata unsigned short *_socket_to_node; 316 static __initdata unsigned short *_socket_to_pnode; 317 static __initdata unsigned short *_pnode_to_socket; 318 static __initdata struct uv_gam_range_s *_gr_table; 319 #define SOCK_EMPTY ((unsigned short)~0) 320 321 extern int uv_hub_info_version(void) 322 { 323 return UV_HUB_INFO_VERSION; 324 } 325 EXPORT_SYMBOL(uv_hub_info_version); 326 327 /* Build GAM range lookup table */ 328 static __init void build_uv_gr_table(void) 329 { 330 struct uv_gam_range_entry *gre = uv_gre_table; 331 struct uv_gam_range_s *grt; 332 unsigned long last_limit = 0, ram_limit = 0; 333 int bytes, i, sid, lsid = -1, indx = 0, lindx = -1; 334 335 if (!gre) 336 return; 337 338 bytes = _gr_table_len * sizeof(struct uv_gam_range_s); 339 grt = kzalloc(bytes, GFP_KERNEL); 340 BUG_ON(!grt); 341 _gr_table = grt; 342 343 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) { 344 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) { 345 if (!ram_limit) { /* mark hole between ram/non-ram */ 346 ram_limit = last_limit; 347 last_limit = gre->limit; 348 lsid++; 349 continue; 350 } 351 last_limit = gre->limit; 352 pr_info("UV: extra hole in GAM RE table @%d\n", 353 (int)(gre - uv_gre_table)); 354 continue; 355 } 356 if (_max_socket < gre->sockid) { 357 pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", 358 gre->sockid, _max_socket, 359 (int)(gre - uv_gre_table)); 360 continue; 361 } 362 sid = gre->sockid - _min_socket; 363 if (lsid < sid) { /* new range */ 364 grt = &_gr_table[indx]; 365 grt->base = lindx; 366 grt->nasid = gre->nasid; 367 grt->limit = last_limit = gre->limit; 368 lsid = sid; 369 lindx = indx++; 370 continue; 371 } 372 if (lsid == sid && !ram_limit) { /* update range */ 373 if (grt->limit == last_limit) { /* .. if contiguous */ 374 grt->limit = last_limit = gre->limit; 375 continue; 376 } 377 } 378 if (!ram_limit) { /* non-contiguous ram range */ 379 grt++; 380 grt->base = lindx; 381 grt->nasid = gre->nasid; 382 grt->limit = last_limit = gre->limit; 383 continue; 384 } 385 grt++; /* non-contiguous/non-ram */ 386 grt->base = grt - _gr_table; /* base is this entry */ 387 grt->nasid = gre->nasid; 388 grt->limit = last_limit = gre->limit; 389 lsid++; 390 } 391 392 /* shorten table if possible */ 393 grt++; 394 i = grt - _gr_table; 395 if (i < _gr_table_len) { 396 void *ret; 397 398 bytes = i * sizeof(struct uv_gam_range_s); 399 ret = krealloc(_gr_table, bytes, GFP_KERNEL); 400 if (ret) { 401 _gr_table = ret; 402 _gr_table_len = i; 403 } 404 } 405 406 /* display resultant gam range table */ 407 for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) { 408 int gb = grt->base; 409 unsigned long start = gb < 0 ? 0 : 410 (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT; 411 unsigned long end = 412 (unsigned long)grt->limit << UV_GAM_RANGE_SHFT; 413 414 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", 415 i, grt->nasid, start, end, gb); 416 } 417 } 418 419 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip) 420 { 421 unsigned long val; 422 int pnode; 423 424 pnode = uv_apicid_to_pnode(phys_apicid); 425 phys_apicid |= uv_apicid_hibits; 426 val = (1UL << UVH_IPI_INT_SEND_SHFT) | 427 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) | 428 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) | 429 APIC_DM_INIT; 430 uv_write_global_mmr64(pnode, UVH_IPI_INT, val); 431 432 val = (1UL << UVH_IPI_INT_SEND_SHFT) | 433 (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) | 434 ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) | 435 APIC_DM_STARTUP; 436 uv_write_global_mmr64(pnode, UVH_IPI_INT, val); 437 438 return 0; 439 } 440 441 static void uv_send_IPI_one(int cpu, int vector) 442 { 443 unsigned long apicid; 444 int pnode; 445 446 apicid = per_cpu(x86_cpu_to_apicid, cpu); 447 pnode = uv_apicid_to_pnode(apicid); 448 uv_hub_send_ipi(pnode, apicid, vector); 449 } 450 451 static void uv_send_IPI_mask(const struct cpumask *mask, int vector) 452 { 453 unsigned int cpu; 454 455 for_each_cpu(cpu, mask) 456 uv_send_IPI_one(cpu, vector); 457 } 458 459 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector) 460 { 461 unsigned int this_cpu = smp_processor_id(); 462 unsigned int cpu; 463 464 for_each_cpu(cpu, mask) { 465 if (cpu != this_cpu) 466 uv_send_IPI_one(cpu, vector); 467 } 468 } 469 470 static void uv_send_IPI_allbutself(int vector) 471 { 472 unsigned int this_cpu = smp_processor_id(); 473 unsigned int cpu; 474 475 for_each_online_cpu(cpu) { 476 if (cpu != this_cpu) 477 uv_send_IPI_one(cpu, vector); 478 } 479 } 480 481 static void uv_send_IPI_all(int vector) 482 { 483 uv_send_IPI_mask(cpu_online_mask, vector); 484 } 485 486 static int uv_apic_id_valid(int apicid) 487 { 488 return 1; 489 } 490 491 static int uv_apic_id_registered(void) 492 { 493 return 1; 494 } 495 496 static void uv_init_apic_ldr(void) 497 { 498 } 499 500 static int 501 uv_cpu_mask_to_apicid_and(const struct cpumask *cpumask, 502 const struct cpumask *andmask, 503 unsigned int *apicid) 504 { 505 int unsigned cpu; 506 507 /* 508 * We're using fixed IRQ delivery, can only return one phys APIC ID. 509 * May as well be the first. 510 */ 511 for_each_cpu_and(cpu, cpumask, andmask) { 512 if (cpumask_test_cpu(cpu, cpu_online_mask)) 513 break; 514 } 515 516 if (likely(cpu < nr_cpu_ids)) { 517 *apicid = per_cpu(x86_cpu_to_apicid, cpu) | uv_apicid_hibits; 518 return 0; 519 } 520 521 return -EINVAL; 522 } 523 524 static unsigned int x2apic_get_apic_id(unsigned long x) 525 { 526 unsigned int id; 527 528 WARN_ON(preemptible() && num_online_cpus() > 1); 529 id = x | __this_cpu_read(x2apic_extra_bits); 530 531 return id; 532 } 533 534 static unsigned long set_apic_id(unsigned int id) 535 { 536 unsigned long x; 537 538 /* maskout x2apic_extra_bits ? */ 539 x = id; 540 return x; 541 } 542 543 static unsigned int uv_read_apic_id(void) 544 { 545 return x2apic_get_apic_id(apic_read(APIC_ID)); 546 } 547 548 static int uv_phys_pkg_id(int initial_apicid, int index_msb) 549 { 550 return uv_read_apic_id() >> index_msb; 551 } 552 553 static void uv_send_IPI_self(int vector) 554 { 555 apic_write(APIC_SELF_IPI, vector); 556 } 557 558 static int uv_probe(void) 559 { 560 return apic == &apic_x2apic_uv_x; 561 } 562 563 static struct apic __refdata apic_x2apic_uv_x = { 564 565 .name = "UV large system", 566 .probe = uv_probe, 567 .acpi_madt_oem_check = uv_acpi_madt_oem_check, 568 .apic_id_valid = uv_apic_id_valid, 569 .apic_id_registered = uv_apic_id_registered, 570 571 .irq_delivery_mode = dest_Fixed, 572 .irq_dest_mode = 0, /* physical */ 573 574 .target_cpus = online_target_cpus, 575 .disable_esr = 0, 576 .dest_logical = APIC_DEST_LOGICAL, 577 .check_apicid_used = NULL, 578 579 .vector_allocation_domain = default_vector_allocation_domain, 580 .init_apic_ldr = uv_init_apic_ldr, 581 582 .ioapic_phys_id_map = NULL, 583 .setup_apic_routing = NULL, 584 .cpu_present_to_apicid = default_cpu_present_to_apicid, 585 .apicid_to_cpu_present = NULL, 586 .check_phys_apicid_present = default_check_phys_apicid_present, 587 .phys_pkg_id = uv_phys_pkg_id, 588 589 .get_apic_id = x2apic_get_apic_id, 590 .set_apic_id = set_apic_id, 591 592 .cpu_mask_to_apicid_and = uv_cpu_mask_to_apicid_and, 593 594 .send_IPI = uv_send_IPI_one, 595 .send_IPI_mask = uv_send_IPI_mask, 596 .send_IPI_mask_allbutself = uv_send_IPI_mask_allbutself, 597 .send_IPI_allbutself = uv_send_IPI_allbutself, 598 .send_IPI_all = uv_send_IPI_all, 599 .send_IPI_self = uv_send_IPI_self, 600 601 .wakeup_secondary_cpu = uv_wakeup_secondary, 602 .inquire_remote_apic = NULL, 603 604 .read = native_apic_msr_read, 605 .write = native_apic_msr_write, 606 .eoi_write = native_apic_msr_eoi_write, 607 .icr_read = native_x2apic_icr_read, 608 .icr_write = native_x2apic_icr_write, 609 .wait_icr_idle = native_x2apic_wait_icr_idle, 610 .safe_wait_icr_idle = native_safe_x2apic_wait_icr_idle, 611 }; 612 613 static void set_x2apic_extra_bits(int pnode) 614 { 615 __this_cpu_write(x2apic_extra_bits, pnode << uvh_apicid.s.pnode_shift); 616 } 617 618 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH 3 619 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT 620 621 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size) 622 { 623 union uvh_rh_gam_alias210_overlay_config_2_mmr_u alias; 624 union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect; 625 unsigned long m_redirect; 626 unsigned long m_overlay; 627 int i; 628 629 for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) { 630 switch (i) { 631 case 0: 632 m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR; 633 m_overlay = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_0_MMR; 634 break; 635 case 1: 636 m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR; 637 m_overlay = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_1_MMR; 638 break; 639 case 2: 640 m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR; 641 m_overlay = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_2_MMR; 642 break; 643 } 644 alias.v = uv_read_local_mmr(m_overlay); 645 if (alias.s.enable && alias.s.base == 0) { 646 *size = (1UL << alias.s.m_alias); 647 redirect.v = uv_read_local_mmr(m_redirect); 648 *base = (unsigned long)redirect.s.dest_base 649 << DEST_SHIFT; 650 return; 651 } 652 } 653 *base = *size = 0; 654 } 655 656 enum map_type {map_wb, map_uc}; 657 658 static __init void map_high(char *id, unsigned long base, int pshift, 659 int bshift, int max_pnode, enum map_type map_type) 660 { 661 unsigned long bytes, paddr; 662 663 paddr = base << pshift; 664 bytes = (1UL << bshift) * (max_pnode + 1); 665 if (!paddr) { 666 pr_info("UV: Map %s_HI base address NULL\n", id); 667 return; 668 } 669 pr_debug("UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr, paddr + bytes); 670 if (map_type == map_uc) 671 init_extra_mapping_uc(paddr, bytes); 672 else 673 init_extra_mapping_wb(paddr, bytes); 674 } 675 676 static __init void map_gru_distributed(unsigned long c) 677 { 678 union uvh_rh_gam_gru_overlay_config_mmr_u gru; 679 u64 paddr; 680 unsigned long bytes; 681 int nid; 682 683 gru.v = c; 684 /* only base bits 42:28 relevant in dist mode */ 685 gru_dist_base = gru.v & 0x000007fff0000000UL; 686 if (!gru_dist_base) { 687 pr_info("UV: Map GRU_DIST base address NULL\n"); 688 return; 689 } 690 bytes = 1UL << UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT; 691 gru_dist_lmask = ((1UL << uv_hub_info->m_val) - 1) & ~(bytes - 1); 692 gru_dist_umask = ~((1UL << uv_hub_info->m_val) - 1); 693 gru_dist_base &= gru_dist_lmask; /* Clear bits above M */ 694 for_each_online_node(nid) { 695 paddr = ((u64)uv_node_to_pnode(nid) << uv_hub_info->m_val) | 696 gru_dist_base; 697 init_extra_mapping_wb(paddr, bytes); 698 gru_first_node_paddr = min(paddr, gru_first_node_paddr); 699 gru_last_node_paddr = max(paddr, gru_last_node_paddr); 700 } 701 /* Save upper (63:M) bits of address only for is_GRU_range */ 702 gru_first_node_paddr &= gru_dist_umask; 703 gru_last_node_paddr &= gru_dist_umask; 704 pr_debug("UV: Map GRU_DIST base 0x%016llx 0x%016llx - 0x%016llx\n", 705 gru_dist_base, gru_first_node_paddr, gru_last_node_paddr); 706 } 707 708 static __init void map_gru_high(int max_pnode) 709 { 710 union uvh_rh_gam_gru_overlay_config_mmr_u gru; 711 int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT; 712 unsigned long mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_MASK; 713 unsigned long base; 714 715 gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR); 716 if (!gru.s.enable) { 717 pr_info("UV: GRU disabled\n"); 718 return; 719 } 720 721 if (is_uv3_hub() && gru.s3.mode) { 722 map_gru_distributed(gru.v); 723 return; 724 } 725 base = (gru.v & mask) >> shift; 726 map_high("GRU", base, shift, shift, max_pnode, map_wb); 727 gru_start_paddr = ((u64)base << shift); 728 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1); 729 } 730 731 static __init void map_mmr_high(int max_pnode) 732 { 733 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr; 734 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT; 735 736 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR); 737 if (mmr.s.enable) 738 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc); 739 else 740 pr_info("UV: MMR disabled\n"); 741 } 742 743 /* 744 * This commonality works because both 0 & 1 versions of the MMIOH OVERLAY 745 * and REDIRECT MMR regs are exactly the same on UV3. 746 */ 747 struct mmioh_config { 748 unsigned long overlay; 749 unsigned long redirect; 750 char *id; 751 }; 752 753 static __initdata struct mmioh_config mmiohs[] = { 754 { 755 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR, 756 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR, 757 "MMIOH0" 758 }, 759 { 760 UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR, 761 UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR, 762 "MMIOH1" 763 }, 764 }; 765 766 /* UV3 & UV4 have identical MMIOH overlay configs */ 767 static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode) 768 { 769 union uv3h_rh_gam_mmioh_overlay_config0_mmr_u overlay; 770 unsigned long mmr; 771 unsigned long base; 772 int i, n, shift, m_io, max_io; 773 int nasid, lnasid, fi, li; 774 char *id; 775 776 id = mmiohs[index].id; 777 overlay.v = uv_read_local_mmr(mmiohs[index].overlay); 778 pr_info("UV: %s overlay 0x%lx base:0x%x m_io:%d\n", 779 id, overlay.v, overlay.s3.base, overlay.s3.m_io); 780 if (!overlay.s3.enable) { 781 pr_info("UV: %s disabled\n", id); 782 return; 783 } 784 785 shift = UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_BASE_SHFT; 786 base = (unsigned long)overlay.s3.base; 787 m_io = overlay.s3.m_io; 788 mmr = mmiohs[index].redirect; 789 n = UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_DEPTH; 790 min_pnode *= 2; /* convert to NASID */ 791 max_pnode *= 2; 792 max_io = lnasid = fi = li = -1; 793 794 for (i = 0; i < n; i++) { 795 union uv3h_rh_gam_mmioh_redirect_config0_mmr_u redirect; 796 797 redirect.v = uv_read_local_mmr(mmr + i * 8); 798 nasid = redirect.s3.nasid; 799 if (nasid < min_pnode || max_pnode < nasid) 800 nasid = -1; /* invalid NASID */ 801 802 if (nasid == lnasid) { 803 li = i; 804 if (i != n-1) /* last entry check */ 805 continue; 806 } 807 808 /* check if we have a cached (or last) redirect to print */ 809 if (lnasid != -1 || (i == n-1 && nasid != -1)) { 810 unsigned long addr1, addr2; 811 int f, l; 812 813 if (lnasid == -1) { 814 f = l = i; 815 lnasid = nasid; 816 } else { 817 f = fi; 818 l = li; 819 } 820 addr1 = (base << shift) + 821 f * (unsigned long)(1 << m_io); 822 addr2 = (base << shift) + 823 (l + 1) * (unsigned long)(1 << m_io); 824 pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n", 825 id, fi, li, lnasid, addr1, addr2); 826 if (max_io < l) 827 max_io = l; 828 } 829 fi = li = i; 830 lnasid = nasid; 831 } 832 833 pr_info("UV: %s base:0x%lx shift:%d M_IO:%d MAX_IO:%d\n", 834 id, base, shift, m_io, max_io); 835 836 if (max_io >= 0) 837 map_high(id, base, shift, m_io, max_io, map_uc); 838 } 839 840 static __init void map_mmioh_high(int min_pnode, int max_pnode) 841 { 842 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh; 843 unsigned long mmr, base; 844 int shift, enable, m_io, n_io; 845 846 if (is_uv3_hub() || is_uv4_hub()) { 847 /* Map both MMIOH Regions */ 848 map_mmioh_high_uv3(0, min_pnode, max_pnode); 849 map_mmioh_high_uv3(1, min_pnode, max_pnode); 850 return; 851 } 852 853 if (is_uv1_hub()) { 854 mmr = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR; 855 shift = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT; 856 mmioh.v = uv_read_local_mmr(mmr); 857 enable = !!mmioh.s1.enable; 858 base = mmioh.s1.base; 859 m_io = mmioh.s1.m_io; 860 n_io = mmioh.s1.n_io; 861 } else if (is_uv2_hub()) { 862 mmr = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR; 863 shift = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT; 864 mmioh.v = uv_read_local_mmr(mmr); 865 enable = !!mmioh.s2.enable; 866 base = mmioh.s2.base; 867 m_io = mmioh.s2.m_io; 868 n_io = mmioh.s2.n_io; 869 } else 870 return; 871 872 if (enable) { 873 max_pnode &= (1 << n_io) - 1; 874 pr_info( 875 "UV: base:0x%lx shift:%d N_IO:%d M_IO:%d max_pnode:0x%x\n", 876 base, shift, m_io, n_io, max_pnode); 877 map_high("MMIOH", base, shift, m_io, max_pnode, map_uc); 878 } else { 879 pr_info("UV: MMIOH disabled\n"); 880 } 881 } 882 883 static __init void map_low_mmrs(void) 884 { 885 init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE); 886 init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE); 887 } 888 889 static __init void uv_rtc_init(void) 890 { 891 long status; 892 u64 ticks_per_sec; 893 894 status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, 895 &ticks_per_sec); 896 if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) { 897 printk(KERN_WARNING 898 "unable to determine platform RTC clock frequency, " 899 "guessing.\n"); 900 /* BIOS gives wrong value for clock freq. so guess */ 901 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL; 902 } else 903 sn_rtc_cycles_per_second = ticks_per_sec; 904 } 905 906 /* 907 * percpu heartbeat timer 908 */ 909 static void uv_heartbeat(unsigned long ignored) 910 { 911 struct timer_list *timer = &uv_scir_info->timer; 912 unsigned char bits = uv_scir_info->state; 913 914 /* flip heartbeat bit */ 915 bits ^= SCIR_CPU_HEARTBEAT; 916 917 /* is this cpu idle? */ 918 if (idle_cpu(raw_smp_processor_id())) 919 bits &= ~SCIR_CPU_ACTIVITY; 920 else 921 bits |= SCIR_CPU_ACTIVITY; 922 923 /* update system controller interface reg */ 924 uv_set_scir_bits(bits); 925 926 /* enable next timer period */ 927 mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL); 928 } 929 930 static void uv_heartbeat_enable(int cpu) 931 { 932 while (!uv_cpu_scir_info(cpu)->enabled) { 933 struct timer_list *timer = &uv_cpu_scir_info(cpu)->timer; 934 935 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY); 936 setup_pinned_timer(timer, uv_heartbeat, cpu); 937 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL; 938 add_timer_on(timer, cpu); 939 uv_cpu_scir_info(cpu)->enabled = 1; 940 941 /* also ensure that boot cpu is enabled */ 942 cpu = 0; 943 } 944 } 945 946 #ifdef CONFIG_HOTPLUG_CPU 947 static void uv_heartbeat_disable(int cpu) 948 { 949 if (uv_cpu_scir_info(cpu)->enabled) { 950 uv_cpu_scir_info(cpu)->enabled = 0; 951 del_timer(&uv_cpu_scir_info(cpu)->timer); 952 } 953 uv_set_cpu_scir_bits(cpu, 0xff); 954 } 955 956 /* 957 * cpu hotplug notifier 958 */ 959 static int uv_scir_cpu_notify(struct notifier_block *self, unsigned long action, 960 void *hcpu) 961 { 962 long cpu = (long)hcpu; 963 964 switch (action & ~CPU_TASKS_FROZEN) { 965 case CPU_DOWN_FAILED: 966 case CPU_ONLINE: 967 uv_heartbeat_enable(cpu); 968 break; 969 case CPU_DOWN_PREPARE: 970 uv_heartbeat_disable(cpu); 971 break; 972 default: 973 break; 974 } 975 return NOTIFY_OK; 976 } 977 978 static __init void uv_scir_register_cpu_notifier(void) 979 { 980 hotcpu_notifier(uv_scir_cpu_notify, 0); 981 } 982 983 #else /* !CONFIG_HOTPLUG_CPU */ 984 985 static __init void uv_scir_register_cpu_notifier(void) 986 { 987 } 988 989 static __init int uv_init_heartbeat(void) 990 { 991 int cpu; 992 993 if (is_uv_system()) 994 for_each_online_cpu(cpu) 995 uv_heartbeat_enable(cpu); 996 return 0; 997 } 998 999 late_initcall(uv_init_heartbeat); 1000 1001 #endif /* !CONFIG_HOTPLUG_CPU */ 1002 1003 /* Direct Legacy VGA I/O traffic to designated IOH */ 1004 int uv_set_vga_state(struct pci_dev *pdev, bool decode, 1005 unsigned int command_bits, u32 flags) 1006 { 1007 int domain, bus, rc; 1008 1009 PR_DEVEL("devfn %x decode %d cmd %x flags %d\n", 1010 pdev->devfn, decode, command_bits, flags); 1011 1012 if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE)) 1013 return 0; 1014 1015 if ((command_bits & PCI_COMMAND_IO) == 0) 1016 return 0; 1017 1018 domain = pci_domain_nr(pdev->bus); 1019 bus = pdev->bus->number; 1020 1021 rc = uv_bios_set_legacy_vga_target(decode, domain, bus); 1022 PR_DEVEL("vga decode %d %x:%x, rc: %d\n", decode, domain, bus, rc); 1023 1024 return rc; 1025 } 1026 1027 /* 1028 * Called on each cpu to initialize the per_cpu UV data area. 1029 * FIXME: hotplug not supported yet 1030 */ 1031 void uv_cpu_init(void) 1032 { 1033 /* CPU 0 initialization will be done via uv_system_init. */ 1034 if (smp_processor_id() == 0) 1035 return; 1036 1037 uv_hub_info->nr_online_cpus++; 1038 1039 if (get_uv_system_type() == UV_NON_UNIQUE_APIC) 1040 set_x2apic_extra_bits(uv_hub_info->pnode); 1041 } 1042 1043 struct mn { 1044 unsigned char m_val; 1045 unsigned char n_val; 1046 unsigned char m_shift; 1047 unsigned char n_lshift; 1048 }; 1049 1050 static void get_mn(struct mn *mnp) 1051 { 1052 union uvh_rh_gam_config_mmr_u m_n_config; 1053 union uv3h_gr0_gam_gr_config_u m_gr_config; 1054 1055 m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR); 1056 mnp->n_val = m_n_config.s.n_skt; 1057 if (is_uv4_hub()) { 1058 mnp->m_val = 0; 1059 mnp->n_lshift = 0; 1060 } else if (is_uv3_hub()) { 1061 mnp->m_val = m_n_config.s3.m_skt; 1062 m_gr_config.v = uv_read_local_mmr(UV3H_GR0_GAM_GR_CONFIG); 1063 mnp->n_lshift = m_gr_config.s3.m_skt; 1064 } else if (is_uv2_hub()) { 1065 mnp->m_val = m_n_config.s2.m_skt; 1066 mnp->n_lshift = mnp->m_val == 40 ? 40 : 39; 1067 } else if (is_uv1_hub()) { 1068 mnp->m_val = m_n_config.s1.m_skt; 1069 mnp->n_lshift = mnp->m_val; 1070 } 1071 mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0; 1072 } 1073 1074 void __init uv_init_hub_info(struct uv_hub_info_s *hub_info) 1075 { 1076 struct mn mn = {0}; /* avoid unitialized warnings */ 1077 union uvh_node_id_u node_id; 1078 1079 get_mn(&mn); 1080 hub_info->m_val = mn.m_val; 1081 hub_info->n_val = mn.n_val; 1082 hub_info->m_shift = mn.m_shift; 1083 hub_info->n_lshift = mn.n_lshift ? mn.n_lshift : 0; 1084 1085 hub_info->hub_revision = uv_hub_info->hub_revision; 1086 hub_info->pnode_mask = uv_cpuid.pnode_mask; 1087 hub_info->min_pnode = _min_pnode; 1088 hub_info->min_socket = _min_socket; 1089 hub_info->pnode_to_socket = _pnode_to_socket; 1090 hub_info->socket_to_node = _socket_to_node; 1091 hub_info->socket_to_pnode = _socket_to_pnode; 1092 hub_info->gr_table_len = _gr_table_len; 1093 hub_info->gr_table = _gr_table; 1094 hub_info->gpa_mask = mn.m_val ? 1095 (1UL << (mn.m_val + mn.n_val)) - 1 : 1096 (1UL << uv_cpuid.gpa_shift) - 1; 1097 1098 node_id.v = uv_read_local_mmr(UVH_NODE_ID); 1099 hub_info->gnode_extra = 1100 (node_id.s.node_id & ~((1 << mn.n_val) - 1)) >> 1; 1101 1102 hub_info->gnode_upper = 1103 ((unsigned long)hub_info->gnode_extra << mn.m_val); 1104 1105 if (uv_gp_table) { 1106 hub_info->global_mmr_base = uv_gp_table->mmr_base; 1107 hub_info->global_mmr_shift = uv_gp_table->mmr_shift; 1108 hub_info->global_gru_base = uv_gp_table->gru_base; 1109 hub_info->global_gru_shift = uv_gp_table->gru_shift; 1110 hub_info->gpa_shift = uv_gp_table->gpa_shift; 1111 hub_info->gpa_mask = (1UL << hub_info->gpa_shift) - 1; 1112 } else { 1113 hub_info->global_mmr_base = 1114 uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & 1115 ~UV_MMR_ENABLE; 1116 hub_info->global_mmr_shift = _UV_GLOBAL_MMR64_PNODE_SHIFT; 1117 } 1118 1119 get_lowmem_redirect( 1120 &hub_info->lowmem_remap_base, &hub_info->lowmem_remap_top); 1121 1122 hub_info->apic_pnode_shift = uv_cpuid.socketid_shift; 1123 1124 /* show system specific info */ 1125 pr_info("UV: N:%d M:%d m_shift:%d n_lshift:%d\n", 1126 hub_info->n_val, hub_info->m_val, 1127 hub_info->m_shift, hub_info->n_lshift); 1128 1129 pr_info("UV: gpa_mask/shift:0x%lx/%d pnode_mask:0x%x apic_pns:%d\n", 1130 hub_info->gpa_mask, hub_info->gpa_shift, 1131 hub_info->pnode_mask, hub_info->apic_pnode_shift); 1132 1133 pr_info("UV: mmr_base/shift:0x%lx/%ld gru_base/shift:0x%lx/%ld\n", 1134 hub_info->global_mmr_base, hub_info->global_mmr_shift, 1135 hub_info->global_gru_base, hub_info->global_gru_shift); 1136 1137 pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", 1138 hub_info->gnode_upper, hub_info->gnode_extra); 1139 } 1140 1141 static void __init decode_gam_params(unsigned long ptr) 1142 { 1143 uv_gp_table = (struct uv_gam_parameters *)ptr; 1144 1145 pr_info("UV: GAM Params...\n"); 1146 pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n", 1147 uv_gp_table->mmr_base, uv_gp_table->mmr_shift, 1148 uv_gp_table->gru_base, uv_gp_table->gru_shift, 1149 uv_gp_table->gpa_shift); 1150 } 1151 1152 static void __init decode_gam_rng_tbl(unsigned long ptr) 1153 { 1154 struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr; 1155 unsigned long lgre = 0; 1156 int index = 0; 1157 int sock_min = 999999, pnode_min = 99999; 1158 int sock_max = -1, pnode_max = -1; 1159 1160 uv_gre_table = gre; 1161 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) { 1162 if (!index) { 1163 pr_info("UV: GAM Range Table...\n"); 1164 pr_info("UV: # %20s %14s %5s %4s %5s %3s %2s\n", 1165 "Range", "", "Size", "Type", "NASID", 1166 "SID", "PN"); 1167 } 1168 pr_info( 1169 "UV: %2d: 0x%014lx-0x%014lx %5luG %3d %04x %02x %02x\n", 1170 index++, 1171 (unsigned long)lgre << UV_GAM_RANGE_SHFT, 1172 (unsigned long)gre->limit << UV_GAM_RANGE_SHFT, 1173 ((unsigned long)(gre->limit - lgre)) >> 1174 (30 - UV_GAM_RANGE_SHFT), /* 64M -> 1G */ 1175 gre->type, gre->nasid, gre->sockid, gre->pnode); 1176 1177 lgre = gre->limit; 1178 if (sock_min > gre->sockid) 1179 sock_min = gre->sockid; 1180 if (sock_max < gre->sockid) 1181 sock_max = gre->sockid; 1182 if (pnode_min > gre->pnode) 1183 pnode_min = gre->pnode; 1184 if (pnode_max < gre->pnode) 1185 pnode_max = gre->pnode; 1186 } 1187 _min_socket = sock_min; 1188 _max_socket = sock_max; 1189 _min_pnode = pnode_min; 1190 _max_pnode = pnode_max; 1191 _gr_table_len = index; 1192 pr_info( 1193 "UV: GRT: %d entries, sockets(min:%x,max:%x) pnodes(min:%x,max:%x)\n", 1194 index, _min_socket, _max_socket, _min_pnode, _max_pnode); 1195 } 1196 1197 static void __init decode_uv_systab(void) 1198 { 1199 struct uv_systab *st; 1200 int i; 1201 1202 st = uv_systab; 1203 if ((!st || st->revision < UV_SYSTAB_VERSION_UV4) && !is_uv4_hub()) 1204 return; 1205 if (st->revision != UV_SYSTAB_VERSION_UV4_LATEST) { 1206 pr_crit( 1207 "UV: BIOS UVsystab version(%x) mismatch, expecting(%x)\n", 1208 st->revision, UV_SYSTAB_VERSION_UV4_LATEST); 1209 BUG(); 1210 } 1211 1212 for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) { 1213 unsigned long ptr = st->entry[i].offset; 1214 1215 if (!ptr) 1216 continue; 1217 1218 ptr = ptr + (unsigned long)st; 1219 1220 switch (st->entry[i].type) { 1221 case UV_SYSTAB_TYPE_GAM_PARAMS: 1222 decode_gam_params(ptr); 1223 break; 1224 1225 case UV_SYSTAB_TYPE_GAM_RNG_TBL: 1226 decode_gam_rng_tbl(ptr); 1227 break; 1228 } 1229 } 1230 } 1231 1232 /* 1233 * Setup physical blade translations from UVH_NODE_PRESENT_TABLE 1234 * .. NB: UVH_NODE_PRESENT_TABLE is going away, 1235 * .. being replaced by GAM Range Table 1236 */ 1237 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info) 1238 { 1239 int i, uv_pb = 0; 1240 1241 pr_info("UV: NODE_PRESENT_DEPTH = %d\n", UVH_NODE_PRESENT_TABLE_DEPTH); 1242 for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) { 1243 unsigned long np; 1244 1245 np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8); 1246 if (np) 1247 pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np); 1248 1249 uv_pb += hweight64(np); 1250 } 1251 if (uv_possible_blades != uv_pb) 1252 uv_possible_blades = uv_pb; 1253 } 1254 1255 static void __init build_socket_tables(void) 1256 { 1257 struct uv_gam_range_entry *gre = uv_gre_table; 1258 int num, nump; 1259 int cpu, i, lnid; 1260 int minsock = _min_socket; 1261 int maxsock = _max_socket; 1262 int minpnode = _min_pnode; 1263 int maxpnode = _max_pnode; 1264 size_t bytes; 1265 1266 if (!gre) { 1267 if (is_uv1_hub() || is_uv2_hub() || is_uv3_hub()) { 1268 pr_info("UV: No UVsystab socket table, ignoring\n"); 1269 return; /* not required */ 1270 } 1271 pr_crit( 1272 "UV: Error: UVsystab address translations not available!\n"); 1273 BUG(); 1274 } 1275 1276 /* build socket id -> node id, pnode */ 1277 num = maxsock - minsock + 1; 1278 bytes = num * sizeof(_socket_to_node[0]); 1279 _socket_to_node = kmalloc(bytes, GFP_KERNEL); 1280 _socket_to_pnode = kmalloc(bytes, GFP_KERNEL); 1281 1282 nump = maxpnode - minpnode + 1; 1283 bytes = nump * sizeof(_pnode_to_socket[0]); 1284 _pnode_to_socket = kmalloc(bytes, GFP_KERNEL); 1285 BUG_ON(!_socket_to_node || !_socket_to_pnode || !_pnode_to_socket); 1286 1287 for (i = 0; i < num; i++) 1288 _socket_to_node[i] = _socket_to_pnode[i] = SOCK_EMPTY; 1289 1290 for (i = 0; i < nump; i++) 1291 _pnode_to_socket[i] = SOCK_EMPTY; 1292 1293 /* fill in pnode/node/addr conversion list values */ 1294 pr_info("UV: GAM Building socket/pnode conversion tables\n"); 1295 for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) { 1296 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) 1297 continue; 1298 i = gre->sockid - minsock; 1299 if (_socket_to_pnode[i] != SOCK_EMPTY) 1300 continue; /* duplicate */ 1301 _socket_to_pnode[i] = gre->pnode; 1302 1303 i = gre->pnode - minpnode; 1304 _pnode_to_socket[i] = gre->sockid; 1305 1306 pr_info( 1307 "UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n", 1308 gre->sockid, gre->type, gre->nasid, 1309 _socket_to_pnode[gre->sockid - minsock], 1310 _pnode_to_socket[gre->pnode - minpnode]); 1311 } 1312 1313 /* Set socket -> node values */ 1314 lnid = -1; 1315 for_each_present_cpu(cpu) { 1316 int nid = cpu_to_node(cpu); 1317 int apicid, sockid; 1318 1319 if (lnid == nid) 1320 continue; 1321 lnid = nid; 1322 apicid = per_cpu(x86_cpu_to_apicid, cpu); 1323 sockid = apicid >> uv_cpuid.socketid_shift; 1324 _socket_to_node[sockid - minsock] = nid; 1325 pr_info("UV: sid:%02x: apicid:%04x node:%2d\n", 1326 sockid, apicid, nid); 1327 } 1328 1329 /* Setup physical blade to pnode translation from GAM Range Table */ 1330 bytes = num_possible_nodes() * sizeof(_node_to_pnode[0]); 1331 _node_to_pnode = kmalloc(bytes, GFP_KERNEL); 1332 BUG_ON(!_node_to_pnode); 1333 1334 for (lnid = 0; lnid < num_possible_nodes(); lnid++) { 1335 unsigned short sockid; 1336 1337 for (sockid = minsock; sockid <= maxsock; sockid++) { 1338 if (lnid == _socket_to_node[sockid - minsock]) { 1339 _node_to_pnode[lnid] = 1340 _socket_to_pnode[sockid - minsock]; 1341 break; 1342 } 1343 } 1344 if (sockid > maxsock) { 1345 pr_err("UV: socket for node %d not found!\n", lnid); 1346 BUG(); 1347 } 1348 } 1349 1350 /* 1351 * If socket id == pnode or socket id == node for all nodes, 1352 * system runs faster by removing corresponding conversion table. 1353 */ 1354 pr_info("UV: Checking socket->node/pnode for identity maps\n"); 1355 if (minsock == 0) { 1356 for (i = 0; i < num; i++) 1357 if (_socket_to_node[i] == SOCK_EMPTY || 1358 i != _socket_to_node[i]) 1359 break; 1360 if (i >= num) { 1361 kfree(_socket_to_node); 1362 _socket_to_node = NULL; 1363 pr_info("UV: 1:1 socket_to_node table removed\n"); 1364 } 1365 } 1366 if (minsock == minpnode) { 1367 for (i = 0; i < num; i++) 1368 if (_socket_to_pnode[i] != SOCK_EMPTY && 1369 _socket_to_pnode[i] != i + minpnode) 1370 break; 1371 if (i >= num) { 1372 kfree(_socket_to_pnode); 1373 _socket_to_pnode = NULL; 1374 pr_info("UV: 1:1 socket_to_pnode table removed\n"); 1375 } 1376 } 1377 } 1378 1379 void __init uv_system_init(void) 1380 { 1381 struct uv_hub_info_s hub_info = {0}; 1382 int bytes, cpu, nodeid; 1383 unsigned short min_pnode = 9999, max_pnode = 0; 1384 char *hub = is_uv4_hub() ? "UV400" : 1385 is_uv3_hub() ? "UV300" : 1386 is_uv2_hub() ? "UV2000/3000" : 1387 is_uv1_hub() ? "UV100/1000" : NULL; 1388 1389 if (!hub) { 1390 pr_err("UV: Unknown/unsupported UV hub\n"); 1391 return; 1392 } 1393 pr_info("UV: Found %s hub\n", hub); 1394 1395 map_low_mmrs(); 1396 1397 uv_bios_init(); /* get uv_systab for decoding */ 1398 decode_uv_systab(); 1399 build_socket_tables(); 1400 build_uv_gr_table(); 1401 uv_init_hub_info(&hub_info); 1402 uv_possible_blades = num_possible_nodes(); 1403 if (!_node_to_pnode) 1404 boot_init_possible_blades(&hub_info); 1405 1406 /* uv_num_possible_blades() is really the hub count */ 1407 pr_info("UV: Found %d hubs, %d nodes, %d cpus\n", 1408 uv_num_possible_blades(), 1409 num_possible_nodes(), 1410 num_possible_cpus()); 1411 1412 uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, 1413 &sn_region_size, &system_serial_number); 1414 hub_info.coherency_domain_number = sn_coherency_id; 1415 uv_rtc_init(); 1416 1417 bytes = sizeof(void *) * uv_num_possible_blades(); 1418 __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL); 1419 BUG_ON(!__uv_hub_info_list); 1420 1421 bytes = sizeof(struct uv_hub_info_s); 1422 for_each_node(nodeid) { 1423 struct uv_hub_info_s *new_hub; 1424 1425 if (__uv_hub_info_list[nodeid]) { 1426 pr_err("UV: Node %d UV HUB already initialized!?\n", 1427 nodeid); 1428 BUG(); 1429 } 1430 1431 /* Allocate new per hub info list */ 1432 new_hub = (nodeid == 0) ? 1433 &uv_hub_info_node0 : 1434 kzalloc_node(bytes, GFP_KERNEL, nodeid); 1435 BUG_ON(!new_hub); 1436 __uv_hub_info_list[nodeid] = new_hub; 1437 new_hub = uv_hub_info_list(nodeid); 1438 BUG_ON(!new_hub); 1439 *new_hub = hub_info; 1440 1441 /* Use information from GAM table if available */ 1442 if (_node_to_pnode) 1443 new_hub->pnode = _node_to_pnode[nodeid]; 1444 else /* Fill in during cpu loop */ 1445 new_hub->pnode = 0xffff; 1446 new_hub->numa_blade_id = uv_node_to_blade_id(nodeid); 1447 new_hub->memory_nid = -1; 1448 new_hub->nr_possible_cpus = 0; 1449 new_hub->nr_online_cpus = 0; 1450 } 1451 1452 /* Initialize per cpu info */ 1453 for_each_possible_cpu(cpu) { 1454 int apicid = per_cpu(x86_cpu_to_apicid, cpu); 1455 int numa_node_id; 1456 unsigned short pnode; 1457 1458 nodeid = cpu_to_node(cpu); 1459 numa_node_id = numa_cpu_node(cpu); 1460 pnode = uv_apicid_to_pnode(apicid); 1461 1462 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list(nodeid); 1463 uv_cpu_info_per(cpu)->blade_cpu_id = 1464 uv_cpu_hub_info(cpu)->nr_possible_cpus++; 1465 if (uv_cpu_hub_info(cpu)->memory_nid == -1) 1466 uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu); 1467 if (nodeid != numa_node_id && /* init memoryless node */ 1468 uv_hub_info_list(numa_node_id)->pnode == 0xffff) 1469 uv_hub_info_list(numa_node_id)->pnode = pnode; 1470 else if (uv_cpu_hub_info(cpu)->pnode == 0xffff) 1471 uv_cpu_hub_info(cpu)->pnode = pnode; 1472 uv_cpu_scir_info(cpu)->offset = uv_scir_offset(apicid); 1473 } 1474 1475 for_each_node(nodeid) { 1476 unsigned short pnode = uv_hub_info_list(nodeid)->pnode; 1477 1478 /* Add pnode info for pre-GAM list nodes without cpus */ 1479 if (pnode == 0xffff) { 1480 unsigned long paddr; 1481 1482 paddr = node_start_pfn(nodeid) << PAGE_SHIFT; 1483 pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr)); 1484 uv_hub_info_list(nodeid)->pnode = pnode; 1485 } 1486 min_pnode = min(pnode, min_pnode); 1487 max_pnode = max(pnode, max_pnode); 1488 pr_info("UV: UVHUB node:%2d pn:%02x nrcpus:%d\n", 1489 nodeid, 1490 uv_hub_info_list(nodeid)->pnode, 1491 uv_hub_info_list(nodeid)->nr_possible_cpus); 1492 } 1493 1494 pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode); 1495 map_gru_high(max_pnode); 1496 map_mmr_high(max_pnode); 1497 map_mmioh_high(min_pnode, max_pnode); 1498 1499 uv_nmi_setup(); 1500 uv_cpu_init(); 1501 uv_scir_register_cpu_notifier(); 1502 proc_mkdir("sgi_uv", NULL); 1503 1504 /* register Legacy VGA I/O redirection handler */ 1505 pci_register_set_vga_state(uv_set_vga_state); 1506 1507 /* 1508 * For a kdump kernel the reset must be BOOT_ACPI, not BOOT_EFI, as 1509 * EFI is not enabled in the kdump kernel. 1510 */ 1511 if (is_kdump_kernel()) 1512 reboot_type = BOOT_ACPI; 1513 } 1514 1515 apic_driver(apic_x2apic_uv_x); 1516