arch/x86/kernel/apic/x2apic_uv_x.c

   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/crash_dump.h>
  11 #include <linux/cpuhotplug.h>
  12 #include <linux/cpumask.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/memory.h>
  15 #include <linux/export.h>
  16 #include <linux/pci.h>
  17
  18 #include <asm/e820/api.h>
  19 #include <asm/uv/uv_mmrs.h>
  20 #include <asm/uv/uv_hub.h>
  21 #include <asm/uv/bios.h>
  22 #include <asm/uv/uv.h>
  23 #include <asm/apic.h>
  24
  25 static DEFINE_PER_CPU(int, x2apic_extra_bits);
  26
  27 static enum uv_system_type      uv_system_type;
  28 static bool                     uv_hubless_system;
  29 static u64                      gru_start_paddr, gru_end_paddr;
  30 static u64                      gru_dist_base, gru_first_node_paddr = -1LL, gru_last_node_paddr;
  31 static u64                      gru_dist_lmask, gru_dist_umask;
  32 static union uvh_apicid         uvh_apicid;
  33
  34 /* Information derived from CPUID: */
  35 static struct {
  36         unsigned int apicid_shift;
  37         unsigned int apicid_mask;
  38         unsigned int socketid_shift;    /* aka pnode_shift for UV1/2/3 */
  39         unsigned int pnode_mask;
  40         unsigned int gpa_shift;
  41         unsigned int gnode_shift;
  42 } uv_cpuid;
  43
  44 int uv_min_hub_revision_id;
  45 EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);
  46
  47 unsigned int uv_apicid_hibits;
  48 EXPORT_SYMBOL_GPL(uv_apicid_hibits);
  49
  50 static struct apic apic_x2apic_uv_x;
  51 static struct uv_hub_info_s uv_hub_info_node0;
  52
  53 /* Set this to use hardware error handler instead of kernel panic: */
  54 static int disable_uv_undefined_panic = 1;
  55
  56 unsigned long uv_undefined(char *str)
  57 {
  58         if (likely(!disable_uv_undefined_panic))
  59                 panic("UV: error: undefined MMR: %s\n", str);
  60         else
  61                 pr_crit("UV: error: undefined MMR: %s\n", str);
  62
  63         /* Cause a machine fault: */
  64         return ~0ul;
  65 }
  66 EXPORT_SYMBOL(uv_undefined);
  67
  68 static unsigned long __init uv_early_read_mmr(unsigned long addr)
  69 {
  70         unsigned long val, *mmr;
  71
  72         mmr = early_ioremap(UV_LOCAL_MMR_BASE | addr, sizeof(*mmr));
  73         val = *mmr;
  74         early_iounmap(mmr, sizeof(*mmr));
  75
  76         return val;
  77 }
  78
  79 static inline bool is_GRU_range(u64 start, u64 end)
  80 {
  81         if (gru_dist_base) {
  82                 u64 su = start & gru_dist_umask; /* Upper (incl pnode) bits */
  83                 u64 sl = start & gru_dist_lmask; /* Base offset bits */
  84                 u64 eu = end & gru_dist_umask;
  85                 u64 el = end & gru_dist_lmask;
  86
  87                 /* Must reside completely within a single GRU range: */
  88                 return (sl == gru_dist_base && el == gru_dist_base &&
  89                         su >= gru_first_node_paddr &&
  90                         su <= gru_last_node_paddr &&
  91                         eu == su);
  92         } else {
  93                 return start >= gru_start_paddr && end <= gru_end_paddr;
  94         }
  95 }
  96
  97 static bool uv_is_untracked_pat_range(u64 start, u64 end)
  98 {
  99         return is_ISA_range(start, end) || is_GRU_range(start, end);
 100 }
 101
 102 static int __init early_get_pnodeid(void)
 103 {
 104         union uvh_node_id_u node_id;
 105         union uvh_rh_gam_config_mmr_u  m_n_config;
 106         int pnode;
 107
 108         /* Currently, all blades have same revision number */
 109         node_id.v = uv_early_read_mmr(UVH_NODE_ID);
 110         m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
 111         uv_min_hub_revision_id = node_id.s.revision;
 112
 113         switch (node_id.s.part_number) {
 114         case UV2_HUB_PART_NUMBER:
 115         case UV2_HUB_PART_NUMBER_X:
 116                 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
 117                 break;
 118         case UV3_HUB_PART_NUMBER:
 119         case UV3_HUB_PART_NUMBER_X:
 120                 uv_min_hub_revision_id += UV3_HUB_REVISION_BASE;
 121                 break;
 122
 123         /* Update: UV4A has only a modified revision to indicate HUB fixes */
 124         case UV4_HUB_PART_NUMBER:
 125                 uv_min_hub_revision_id += UV4_HUB_REVISION_BASE - 1;
 126                 uv_cpuid.gnode_shift = 2; /* min partition is 4 sockets */
 127                 break;
 128         }
 129
 130         uv_hub_info->hub_revision = uv_min_hub_revision_id;
 131         uv_cpuid.pnode_mask = (1 << m_n_config.s.n_skt) - 1;
 132         pnode = (node_id.s.node_id >> 1) & uv_cpuid.pnode_mask;
 133         uv_cpuid.gpa_shift = 46;        /* Default unless changed */
 134
 135         pr_info("UV: rev:%d part#:%x nodeid:%04x n_skt:%d pnmsk:%x pn:%x\n",
 136                 node_id.s.revision, node_id.s.part_number, node_id.s.node_id,
 137                 m_n_config.s.n_skt, uv_cpuid.pnode_mask, pnode);
 138         return pnode;
 139 }
 140
 141 static void __init uv_tsc_check_sync(void)
 142 {
 143         u64 mmr;
 144         int sync_state;
 145         int mmr_shift;
 146         char *state;
 147         bool valid;
 148
 149         /* Accommodate different UV arch BIOSes */
 150         mmr = uv_early_read_mmr(UVH_TSC_SYNC_MMR);
 151         mmr_shift =
 152                 is_uv1_hub() ? 0 :
 153                 is_uv2_hub() ? UVH_TSC_SYNC_SHIFT_UV2K : UVH_TSC_SYNC_SHIFT;
 154         if (mmr_shift)
 155                 sync_state = (mmr >> mmr_shift) & UVH_TSC_SYNC_MASK;
 156         else
 157                 sync_state = 0;
 158
 159         switch (sync_state) {
 160         case UVH_TSC_SYNC_VALID:
 161                 state = "in sync";
 162                 valid = true;
 163                 break;
 164
 165         case UVH_TSC_SYNC_INVALID:
 166                 state = "unstable";
 167                 valid = false;
 168                 break;
 169         default:
 170                 state = "unknown: assuming valid";
 171                 valid = true;
 172                 break;
 173         }
 174         pr_info("UV: TSC sync state from BIOS:0%d(%s)\n", sync_state, state);
 175
 176         /* Mark flag that says TSC != 0 is valid for socket 0 */
 177         if (valid)
 178                 mark_tsc_async_resets("UV BIOS");
 179         else
 180                 mark_tsc_unstable("UV BIOS");
 181 }
 182
 183 /* [Copied from arch/x86/kernel/cpu/topology.c:detect_extended_topology()] */
 184
 185 #define SMT_LEVEL                       0       /* Leaf 0xb SMT level */
 186 #define INVALID_TYPE                    0       /* Leaf 0xb sub-leaf types */
 187 #define SMT_TYPE                        1
 188 #define CORE_TYPE                       2
 189 #define LEAFB_SUBTYPE(ecx)              (((ecx) >> 8) & 0xff)
 190 #define BITS_SHIFT_NEXT_LEVEL(eax)      ((eax) & 0x1f)
 191
 192 static void set_x2apic_bits(void)
 193 {
 194         unsigned int eax, ebx, ecx, edx, sub_index;
 195         unsigned int sid_shift;
 196
 197         cpuid(0, &eax, &ebx, &ecx, &edx);
 198         if (eax < 0xb) {
 199                 pr_info("UV: CPU does not have CPUID.11\n");
 200                 return;
 201         }
 202
 203         cpuid_count(0xb, SMT_LEVEL, &eax, &ebx, &ecx, &edx);
 204         if (ebx == 0 || (LEAFB_SUBTYPE(ecx) != SMT_TYPE)) {
 205                 pr_info("UV: CPUID.11 not implemented\n");
 206                 return;
 207         }
 208
 209         sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
 210         sub_index = 1;
 211         do {
 212                 cpuid_count(0xb, sub_index, &eax, &ebx, &ecx, &edx);
 213                 if (LEAFB_SUBTYPE(ecx) == CORE_TYPE) {
 214                         sid_shift = BITS_SHIFT_NEXT_LEVEL(eax);
 215                         break;
 216                 }
 217                 sub_index++;
 218         } while (LEAFB_SUBTYPE(ecx) != INVALID_TYPE);
 219
 220         uv_cpuid.apicid_shift   = 0;
 221         uv_cpuid.apicid_mask    = (~(-1 << sid_shift));
 222         uv_cpuid.socketid_shift = sid_shift;
 223 }
 224
 225 static void __init early_get_apic_socketid_shift(void)
 226 {
 227         if (is_uv2_hub() || is_uv3_hub())
 228                 uvh_apicid.v = uv_early_read_mmr(UVH_APICID);
 229
 230         set_x2apic_bits();
 231
 232         pr_info("UV: apicid_shift:%d apicid_mask:0x%x\n", uv_cpuid.apicid_shift, uv_cpuid.apicid_mask);
 233         pr_info("UV: socketid_shift:%d pnode_mask:0x%x\n", uv_cpuid.socketid_shift, uv_cpuid.pnode_mask);
 234 }
 235
 236 /*
 237  * Add an extra bit as dictated by bios to the destination apicid of
 238  * interrupts potentially passing through the UV HUB.  This prevents
 239  * a deadlock between interrupts and IO port operations.
 240  */
 241 static void __init uv_set_apicid_hibit(void)
 242 {
 243         union uv1h_lb_target_physical_apic_id_mask_u apicid_mask;
 244
 245         if (is_uv1_hub()) {
 246                 apicid_mask.v = uv_early_read_mmr(UV1H_LB_TARGET_PHYSICAL_APIC_ID_MASK);
 247                 uv_apicid_hibits = apicid_mask.s1.bit_enables & UV_APICID_HIBIT_MASK;
 248         }
 249 }
 250
 251 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 252 {
 253         int pnodeid;
 254         int uv_apic;
 255
 256         if (strncmp(oem_id, "SGI", 3) != 0) {
 257                 if (strncmp(oem_id, "NSGI", 4) == 0) {
 258                         uv_hubless_system = true;
 259                         pr_info("UV: OEM IDs %s/%s, HUBLESS\n",
 260                                 oem_id, oem_table_id);
 261                 }
 262                 return 0;
 263         }
 264
 265         if (numa_off) {
 266                 pr_err("UV: NUMA is off, disabling UV support\n");
 267                 return 0;
 268         }
 269
 270         /* Set up early hub type field in uv_hub_info for Node 0 */
 271         uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0;
 272
 273         /*
 274          * Determine UV arch type.
 275          *   SGI:  UV100/1000
 276          *   SGI2: UV2000/3000
 277          *   SGI3: UV300 (truncated to 4 chars because of different varieties)
 278          *   SGI4: UV400 (truncated to 4 chars because of different varieties)
 279          */
 280         uv_hub_info->hub_revision =
 281                 !strncmp(oem_id, "SGI4", 4) ? UV4_HUB_REVISION_BASE :
 282                 !strncmp(oem_id, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
 283                 !strcmp(oem_id, "SGI2") ? UV2_HUB_REVISION_BASE :
 284                 !strcmp(oem_id, "SGI") ? UV1_HUB_REVISION_BASE : 0;
 285
 286         if (uv_hub_info->hub_revision == 0)
 287                 goto badbios;
 288
 289         pnodeid = early_get_pnodeid();
 290         early_get_apic_socketid_shift();
 291
 292         x86_platform.is_untracked_pat_range = uv_is_untracked_pat_range;
 293         x86_platform.nmi_init = uv_nmi_init;
 294
 295         if (!strcmp(oem_table_id, "UVX")) {
 296                 /* This is the most common hardware variant: */
 297                 uv_system_type = UV_X2APIC;
 298                 uv_apic = 0;
 299
 300         } else if (!strcmp(oem_table_id, "UVH")) {
 301                 /* Only UV1 systems: */
 302                 uv_system_type = UV_NON_UNIQUE_APIC;
 303                 x86_platform.legacy.warm_reset = 0;
 304                 __this_cpu_write(x2apic_extra_bits, pnodeid << uvh_apicid.s.pnode_shift);
 305                 uv_set_apicid_hibit();
 306                 uv_apic = 1;
 307
 308         } else if (!strcmp(oem_table_id, "UVL")) {
 309                 /* Only used for very small systems:  */
 310                 uv_system_type = UV_LEGACY_APIC;
 311                 uv_apic = 0;
 312
 313         } else {
 314                 goto badbios;
 315         }
 316
 317         pr_info("UV: OEM IDs %s/%s, System/HUB Types %d/%d, uv_apic %d\n", oem_id, oem_table_id, uv_system_type, uv_min_hub_revision_id, uv_apic);
 318         uv_tsc_check_sync();
 319
 320         return uv_apic;
 321
 322 badbios:
 323         pr_err("UV: OEM_ID:%s OEM_TABLE_ID:%s\n", oem_id, oem_table_id);
 324         pr_err("Current BIOS not supported, update kernel and/or BIOS\n");
 325         BUG();
 326 }
 327
 328 enum uv_system_type get_uv_system_type(void)
 329 {
 330         return uv_system_type;
 331 }
 332
 333 int is_uv_system(void)
 334 {
 335         return uv_system_type != UV_NONE;
 336 }
 337 EXPORT_SYMBOL_GPL(is_uv_system);
 338
 339 int is_uv_hubless(void)
 340 {
 341         return uv_hubless_system;
 342 }
 343 EXPORT_SYMBOL_GPL(is_uv_hubless);
 344
 345 void **__uv_hub_info_list;
 346 EXPORT_SYMBOL_GPL(__uv_hub_info_list);
 347
 348 DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
 349 EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
 350
 351 short uv_possible_blades;
 352 EXPORT_SYMBOL_GPL(uv_possible_blades);
 353
 354 unsigned long sn_rtc_cycles_per_second;
 355 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
 356
 357 /* The following values are used for the per node hub info struct */
 358 static __initdata unsigned short                *_node_to_pnode;
 359 static __initdata unsigned short                _min_socket, _max_socket;
 360 static __initdata unsigned short                _min_pnode, _max_pnode, _gr_table_len;
 361 static __initdata struct uv_gam_range_entry     *uv_gre_table;
 362 static __initdata struct uv_gam_parameters      *uv_gp_table;
 363 static __initdata unsigned short                *_socket_to_node;
 364 static __initdata unsigned short                *_socket_to_pnode;
 365 static __initdata unsigned short                *_pnode_to_socket;
 366
 367 static __initdata struct uv_gam_range_s         *_gr_table;
 368
 369 #define SOCK_EMPTY      ((unsigned short)~0)
 370
 371 extern int uv_hub_info_version(void)
 372 {
 373         return UV_HUB_INFO_VERSION;
 374 }
 375 EXPORT_SYMBOL(uv_hub_info_version);
 376
 377 /* Default UV memory block size is 2GB */
 378 static unsigned long mem_block_size __initdata = (2UL << 30);
 379
 380 /* Kernel parameter to specify UV mem block size */
 381 static int __init parse_mem_block_size(char *ptr)
 382 {
 383         unsigned long size = memparse(ptr, NULL);
 384
 385         /* Size will be rounded down by set_block_size() below */
 386         mem_block_size = size;
 387         return 0;
 388 }
 389 early_param("uv_memblksize", parse_mem_block_size);
 390
 391 static __init int adj_blksize(u32 lgre)
 392 {
 393         unsigned long base = (unsigned long)lgre << UV_GAM_RANGE_SHFT;
 394         unsigned long size;
 395
 396         for (size = mem_block_size; size > MIN_MEMORY_BLOCK_SIZE; size >>= 1)
 397                 if (IS_ALIGNED(base, size))
 398                         break;
 399
 400         if (size >= mem_block_size)
 401                 return 0;
 402
 403         mem_block_size = size;
 404         return 1;
 405 }
 406
 407 static __init void set_block_size(void)
 408 {
 409         unsigned int order = ffs(mem_block_size);
 410
 411         if (order) {
 412                 /* adjust for ffs return of 1..64 */
 413                 set_memory_block_size_order(order - 1);
 414                 pr_info("UV: mem_block_size set to 0x%lx\n", mem_block_size);
 415         } else {
 416                 /* bad or zero value, default to 1UL << 31 (2GB) */
 417                 pr_err("UV: mem_block_size error with 0x%lx\n", mem_block_size);
 418                 set_memory_block_size_order(31);
 419         }
 420 }
 421
 422 /* Build GAM range lookup table: */
 423 static __init void build_uv_gr_table(void)
 424 {
 425         struct uv_gam_range_entry *gre = uv_gre_table;
 426         struct uv_gam_range_s *grt;
 427         unsigned long last_limit = 0, ram_limit = 0;
 428         int bytes, i, sid, lsid = -1, indx = 0, lindx = -1;
 429
 430         if (!gre)
 431                 return;
 432
 433         bytes = _gr_table_len * sizeof(struct uv_gam_range_s);
 434         grt = kzalloc(bytes, GFP_KERNEL);
 435         BUG_ON(!grt);
 436         _gr_table = grt;
 437
 438         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
 439                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE) {
 440                         if (!ram_limit) {
 441                                 /* Mark hole between RAM/non-RAM: */
 442                                 ram_limit = last_limit;
 443                                 last_limit = gre->limit;
 444                                 lsid++;
 445                                 continue;
 446                         }
 447                         last_limit = gre->limit;
 448                         pr_info("UV: extra hole in GAM RE table @%d\n", (int)(gre - uv_gre_table));
 449                         continue;
 450                 }
 451                 if (_max_socket < gre->sockid) {
 452                         pr_err("UV: GAM table sockid(%d) too large(>%d) @%d\n", gre->sockid, _max_socket, (int)(gre - uv_gre_table));
 453                         continue;
 454                 }
 455                 sid = gre->sockid - _min_socket;
 456                 if (lsid < sid) {
 457                         /* New range: */
 458                         grt = &_gr_table[indx];
 459                         grt->base = lindx;
 460                         grt->nasid = gre->nasid;
 461                         grt->limit = last_limit = gre->limit;
 462                         lsid = sid;
 463                         lindx = indx++;
 464                         continue;
 465                 }
 466                 /* Update range: */
 467                 if (lsid == sid && !ram_limit) {
 468                         /* .. if contiguous: */
 469                         if (grt->limit == last_limit) {
 470                                 grt->limit = last_limit = gre->limit;
 471                                 continue;
 472                         }
 473                 }
 474                 /* Non-contiguous RAM range: */
 475                 if (!ram_limit) {
 476                         grt++;
 477                         grt->base = lindx;
 478                         grt->nasid = gre->nasid;
 479                         grt->limit = last_limit = gre->limit;
 480                         continue;
 481                 }
 482                 /* Non-contiguous/non-RAM: */
 483                 grt++;
 484                 /* base is this entry */
 485                 grt->base = grt - _gr_table;
 486                 grt->nasid = gre->nasid;
 487                 grt->limit = last_limit = gre->limit;
 488                 lsid++;
 489         }
 490
 491         /* Shorten table if possible */
 492         grt++;
 493         i = grt - _gr_table;
 494         if (i < _gr_table_len) {
 495                 void *ret;
 496
 497                 bytes = i * sizeof(struct uv_gam_range_s);
 498                 ret = krealloc(_gr_table, bytes, GFP_KERNEL);
 499                 if (ret) {
 500                         _gr_table = ret;
 501                         _gr_table_len = i;
 502                 }
 503         }
 504
 505         /* Display resultant GAM range table: */
 506         for (i = 0, grt = _gr_table; i < _gr_table_len; i++, grt++) {
 507                 unsigned long start, end;
 508                 int gb = grt->base;
 509
 510                 start = gb < 0 ?  0 : (unsigned long)_gr_table[gb].limit << UV_GAM_RANGE_SHFT;
 511                 end = (unsigned long)grt->limit << UV_GAM_RANGE_SHFT;
 512
 513                 pr_info("UV: GAM Range %2d %04x 0x%013lx-0x%013lx (%d)\n", i, grt->nasid, start, end, gb);
 514         }
 515 }
 516
 517 static int uv_wakeup_secondary(int phys_apicid, unsigned long start_rip)
 518 {
 519         unsigned long val;
 520         int pnode;
 521
 522         pnode = uv_apicid_to_pnode(phys_apicid);
 523         phys_apicid |= uv_apicid_hibits;
 524
 525         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 526             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 527             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 528             APIC_DM_INIT;
 529
 530         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 531
 532         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
 533             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
 534             ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
 535             APIC_DM_STARTUP;
 536
 537         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
 538
 539         return 0;
 540 }
 541
 542 static void uv_send_IPI_one(int cpu, int vector)
 543 {
 544         unsigned long apicid;
 545         int pnode;
 546
 547         apicid = per_cpu(x86_cpu_to_apicid, cpu);
 548         pnode = uv_apicid_to_pnode(apicid);
 549         uv_hub_send_ipi(pnode, apicid, vector);
 550 }
 551
 552 static void uv_send_IPI_mask(const struct cpumask *mask, int vector)
 553 {
 554         unsigned int cpu;
 555
 556         for_each_cpu(cpu, mask)
 557                 uv_send_IPI_one(cpu, vector);
 558 }
 559
 560 static void uv_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
 561 {
 562         unsigned int this_cpu = smp_processor_id();
 563         unsigned int cpu;
 564
 565         for_each_cpu(cpu, mask) {
 566                 if (cpu != this_cpu)
 567                         uv_send_IPI_one(cpu, vector);
 568         }
 569 }
 570
 571 static void uv_send_IPI_allbutself(int vector)
 572 {
 573         unsigned int this_cpu = smp_processor_id();
 574         unsigned int cpu;
 575
 576         for_each_online_cpu(cpu) {
 577                 if (cpu != this_cpu)
 578                         uv_send_IPI_one(cpu, vector);
 579         }
 580 }
 581
 582 static void uv_send_IPI_all(int vector)
 583 {
 584         uv_send_IPI_mask(cpu_online_mask, vector);
 585 }
 586
 587 static int uv_apic_id_valid(u32 apicid)
 588 {
 589         return 1;
 590 }
 591
 592 static int uv_apic_id_registered(void)
 593 {
 594         return 1;
 595 }
 596
 597 static void uv_init_apic_ldr(void)
 598 {
 599 }
 600
 601 static u32 apic_uv_calc_apicid(unsigned int cpu)
 602 {
 603         return apic_default_calc_apicid(cpu) | uv_apicid_hibits;
 604 }
 605
 606 static unsigned int x2apic_get_apic_id(unsigned long x)
 607 {
 608         unsigned int id;
 609
 610         WARN_ON(preemptible() && num_online_cpus() > 1);
 611         id = x | __this_cpu_read(x2apic_extra_bits);
 612
 613         return id;
 614 }
 615
 616 static u32 set_apic_id(unsigned int id)
 617 {
 618         /* CHECKME: Do we need to mask out the xapic extra bits? */
 619         return id;
 620 }
 621
 622 static unsigned int uv_read_apic_id(void)
 623 {
 624         return x2apic_get_apic_id(apic_read(APIC_ID));
 625 }
 626
 627 static int uv_phys_pkg_id(int initial_apicid, int index_msb)
 628 {
 629         return uv_read_apic_id() >> index_msb;
 630 }
 631
 632 static void uv_send_IPI_self(int vector)
 633 {
 634         apic_write(APIC_SELF_IPI, vector);
 635 }
 636
 637 static int uv_probe(void)
 638 {
 639         return apic == &apic_x2apic_uv_x;
 640 }
 641
 642 static struct apic apic_x2apic_uv_x __ro_after_init = {
 643
 644         .name                           = "UV large system",
 645         .probe                          = uv_probe,
 646         .acpi_madt_oem_check            = uv_acpi_madt_oem_check,
 647         .apic_id_valid                  = uv_apic_id_valid,
 648         .apic_id_registered             = uv_apic_id_registered,
 649
 650         .irq_delivery_mode              = dest_Fixed,
 651         .irq_dest_mode                  = 0, /* Physical */
 652
 653         .disable_esr                    = 0,
 654         .dest_logical                   = APIC_DEST_LOGICAL,
 655         .check_apicid_used              = NULL,
 656
 657         .init_apic_ldr                  = uv_init_apic_ldr,
 658
 659         .ioapic_phys_id_map             = NULL,
 660         .setup_apic_routing             = NULL,
 661         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 662         .apicid_to_cpu_present          = NULL,
 663         .check_phys_apicid_present      = default_check_phys_apicid_present,
 664         .phys_pkg_id                    = uv_phys_pkg_id,
 665
 666         .get_apic_id                    = x2apic_get_apic_id,
 667         .set_apic_id                    = set_apic_id,
 668
 669         .calc_dest_apicid               = apic_uv_calc_apicid,
 670
 671         .send_IPI                       = uv_send_IPI_one,
 672         .send_IPI_mask                  = uv_send_IPI_mask,
 673         .send_IPI_mask_allbutself       = uv_send_IPI_mask_allbutself,
 674         .send_IPI_allbutself            = uv_send_IPI_allbutself,
 675         .send_IPI_all                   = uv_send_IPI_all,
 676         .send_IPI_self                  = uv_send_IPI_self,
 677
 678         .wakeup_secondary_cpu           = uv_wakeup_secondary,
 679         .inquire_remote_apic            = NULL,
 680
 681         .read                           = native_apic_msr_read,
 682         .write                          = native_apic_msr_write,
 683         .eoi_write                      = native_apic_msr_eoi_write,
 684         .icr_read                       = native_x2apic_icr_read,
 685         .icr_write                      = native_x2apic_icr_write,
 686         .wait_icr_idle                  = native_x2apic_wait_icr_idle,
 687         .safe_wait_icr_idle             = native_safe_x2apic_wait_icr_idle,
 688 };
 689
 690 static void set_x2apic_extra_bits(int pnode)
 691 {
 692         __this_cpu_write(x2apic_extra_bits, pnode << uvh_apicid.s.pnode_shift);
 693 }
 694
 695 #define UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH      3
 696 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
 697
 698 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 699 {
 700         union uvh_rh_gam_alias210_overlay_config_2_mmr_u alias;
 701         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
 702         unsigned long m_redirect;
 703         unsigned long m_overlay;
 704         int i;
 705
 706         for (i = 0; i < UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_LENGTH; i++) {
 707                 switch (i) {
 708                 case 0:
 709                         m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR;
 710                         m_overlay  = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_0_MMR;
 711                         break;
 712                 case 1:
 713                         m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR;
 714                         m_overlay  = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_1_MMR;
 715                         break;
 716                 case 2:
 717                         m_redirect = UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR;
 718                         m_overlay  = UVH_RH_GAM_ALIAS210_OVERLAY_CONFIG_2_MMR;
 719                         break;
 720                 }
 721                 alias.v = uv_read_local_mmr(m_overlay);
 722                 if (alias.s.enable && alias.s.base == 0) {
 723                         *size = (1UL << alias.s.m_alias);
 724                         redirect.v = uv_read_local_mmr(m_redirect);
 725                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 726                         return;
 727                 }
 728         }
 729         *base = *size = 0;
 730 }
 731
 732 enum map_type {map_wb, map_uc};
 733
 734 static __init void map_high(char *id, unsigned long base, int pshift, int bshift, int max_pnode, enum map_type map_type)
 735 {
 736         unsigned long bytes, paddr;
 737
 738         paddr = base << pshift;
 739         bytes = (1UL << bshift) * (max_pnode + 1);
 740         if (!paddr) {
 741                 pr_info("UV: Map %s_HI base address NULL\n", id);
 742                 return;
 743         }
 744         pr_debug("UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr, paddr + bytes);
 745         if (map_type == map_uc)
 746                 init_extra_mapping_uc(paddr, bytes);
 747         else
 748                 init_extra_mapping_wb(paddr, bytes);
 749 }
 750
 751 static __init void map_gru_distributed(unsigned long c)
 752 {
 753         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 754         u64 paddr;
 755         unsigned long bytes;
 756         int nid;
 757
 758         gru.v = c;
 759
 760         /* Only base bits 42:28 relevant in dist mode */
 761         gru_dist_base = gru.v & 0x000007fff0000000UL;
 762         if (!gru_dist_base) {
 763                 pr_info("UV: Map GRU_DIST base address NULL\n");
 764                 return;
 765         }
 766
 767         bytes = 1UL << UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 768         gru_dist_lmask = ((1UL << uv_hub_info->m_val) - 1) & ~(bytes - 1);
 769         gru_dist_umask = ~((1UL << uv_hub_info->m_val) - 1);
 770         gru_dist_base &= gru_dist_lmask; /* Clear bits above M */
 771
 772         for_each_online_node(nid) {
 773                 paddr = ((u64)uv_node_to_pnode(nid) << uv_hub_info->m_val) |
 774                                 gru_dist_base;
 775                 init_extra_mapping_wb(paddr, bytes);
 776                 gru_first_node_paddr = min(paddr, gru_first_node_paddr);
 777                 gru_last_node_paddr = max(paddr, gru_last_node_paddr);
 778         }
 779
 780         /* Save upper (63:M) bits of address only for is_GRU_range */
 781         gru_first_node_paddr &= gru_dist_umask;
 782         gru_last_node_paddr &= gru_dist_umask;
 783
 784         pr_debug("UV: Map GRU_DIST base 0x%016llx  0x%016llx - 0x%016llx\n", gru_dist_base, gru_first_node_paddr, gru_last_node_paddr);
 785 }
 786
 787 static __init void map_gru_high(int max_pnode)
 788 {
 789         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 790         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 791         unsigned long mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_MASK;
 792         unsigned long base;
 793
 794         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 795         if (!gru.s.enable) {
 796                 pr_info("UV: GRU disabled\n");
 797                 return;
 798         }
 799
 800         /* Only UV3 has distributed GRU mode */
 801         if (is_uv3_hub() && gru.s3.mode) {
 802                 map_gru_distributed(gru.v);
 803                 return;
 804         }
 805
 806         base = (gru.v & mask) >> shift;
 807         map_high("GRU", base, shift, shift, max_pnode, map_wb);
 808         gru_start_paddr = ((u64)base << shift);
 809         gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
 810 }
 811
 812 static __init void map_mmr_high(int max_pnode)
 813 {
 814         union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
 815         int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
 816
 817         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 818         if (mmr.s.enable)
 819                 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
 820         else
 821                 pr_info("UV: MMR disabled\n");
 822 }
 823
 824 /* UV3/4 have identical MMIOH overlay configs, UV4A is slightly different */
 825 static __init void map_mmioh_high_uv34(int index, int min_pnode, int max_pnode)
 826 {
 827         unsigned long overlay;
 828         unsigned long mmr;
 829         unsigned long base;
 830         unsigned long nasid_mask;
 831         unsigned long m_overlay;
 832         int i, n, shift, m_io, max_io;
 833         int nasid, lnasid, fi, li;
 834         char *id;
 835
 836         if (index == 0) {
 837                 id = "MMIOH0";
 838                 m_overlay = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR;
 839                 overlay = uv_read_local_mmr(m_overlay);
 840                 base = overlay & UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_BASE_MASK;
 841                 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR;
 842                 m_io = (overlay & UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_M_IO_MASK)
 843                         >> UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_M_IO_SHFT;
 844                 shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_M_IO_SHFT;
 845                 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_DEPTH;
 846                 nasid_mask = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_NASID_MASK;
 847         } else {
 848                 id = "MMIOH1";
 849                 m_overlay = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR;
 850                 overlay = uv_read_local_mmr(m_overlay);
 851                 base = overlay & UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR_BASE_MASK;
 852                 mmr = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR;
 853                 m_io = (overlay & UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR_M_IO_MASK)
 854                         >> UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR_M_IO_SHFT;
 855                 shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR_M_IO_SHFT;
 856                 n = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR_DEPTH;
 857                 nasid_mask = UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR_NASID_MASK;
 858         }
 859         pr_info("UV: %s overlay 0x%lx base:0x%lx m_io:%d\n", id, overlay, base, m_io);
 860         if (!(overlay & UVH_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_ENABLE_MASK)) {
 861                 pr_info("UV: %s disabled\n", id);
 862                 return;
 863         }
 864
 865         /* Convert to NASID: */
 866         min_pnode *= 2;
 867         max_pnode *= 2;
 868         max_io = lnasid = fi = li = -1;
 869
 870         for (i = 0; i < n; i++) {
 871                 unsigned long m_redirect = mmr + i * 8;
 872                 unsigned long redirect = uv_read_local_mmr(m_redirect);
 873
 874                 nasid = redirect & nasid_mask;
 875                 if (i == 0)
 876                         pr_info("UV: %s redirect base 0x%lx(@0x%lx) 0x%04x\n",
 877                                 id, redirect, m_redirect, nasid);
 878
 879                 /* Invalid NASID: */
 880                 if (nasid < min_pnode || max_pnode < nasid)
 881                         nasid = -1;
 882
 883                 if (nasid == lnasid) {
 884                         li = i;
 885                         /* Last entry check: */
 886                         if (i != n-1)
 887                                 continue;
 888                 }
 889
 890                 /* Check if we have a cached (or last) redirect to print: */
 891                 if (lnasid != -1 || (i == n-1 && nasid != -1))  {
 892                         unsigned long addr1, addr2;
 893                         int f, l;
 894
 895                         if (lnasid == -1) {
 896                                 f = l = i;
 897                                 lnasid = nasid;
 898                         } else {
 899                                 f = fi;
 900                                 l = li;
 901                         }
 902                         addr1 = (base << shift) + f * (1ULL << m_io);
 903                         addr2 = (base << shift) + (l + 1) * (1ULL << m_io);
 904                         pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n", id, fi, li, lnasid, addr1, addr2);
 905                         if (max_io < l)
 906                                 max_io = l;
 907                 }
 908                 fi = li = i;
 909                 lnasid = nasid;
 910         }
 911
 912         pr_info("UV: %s base:0x%lx shift:%d M_IO:%d MAX_IO:%d\n", id, base, shift, m_io, max_io);
 913
 914         if (max_io >= 0)
 915                 map_high(id, base, shift, m_io, max_io, map_uc);
 916 }
 917
 918 static __init void map_mmioh_high(int min_pnode, int max_pnode)
 919 {
 920         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
 921         unsigned long mmr, base;
 922         int shift, enable, m_io, n_io;
 923
 924         if (is_uv3_hub() || is_uv4_hub()) {
 925                 /* Map both MMIOH regions: */
 926                 map_mmioh_high_uv34(0, min_pnode, max_pnode);
 927                 map_mmioh_high_uv34(1, min_pnode, max_pnode);
 928                 return;
 929         }
 930
 931         if (is_uv1_hub()) {
 932                 mmr     = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
 933                 shift   = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
 934                 mmioh.v = uv_read_local_mmr(mmr);
 935                 enable  = !!mmioh.s1.enable;
 936                 base    = mmioh.s1.base;
 937                 m_io    = mmioh.s1.m_io;
 938                 n_io    = mmioh.s1.n_io;
 939         } else if (is_uv2_hub()) {
 940                 mmr     = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
 941                 shift   = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
 942                 mmioh.v = uv_read_local_mmr(mmr);
 943                 enable  = !!mmioh.s2.enable;
 944                 base    = mmioh.s2.base;
 945                 m_io    = mmioh.s2.m_io;
 946                 n_io    = mmioh.s2.n_io;
 947         } else {
 948                 return;
 949         }
 950
 951         if (enable) {
 952                 max_pnode &= (1 << n_io) - 1;
 953                 pr_info("UV: base:0x%lx shift:%d N_IO:%d M_IO:%d max_pnode:0x%x\n", base, shift, m_io, n_io, max_pnode);
 954                 map_high("MMIOH", base, shift, m_io, max_pnode, map_uc);
 955         } else {
 956                 pr_info("UV: MMIOH disabled\n");
 957         }
 958 }
 959
 960 static __init void map_low_mmrs(void)
 961 {
 962         init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
 963         init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
 964 }
 965
 966 static __init void uv_rtc_init(void)
 967 {
 968         long status;
 969         u64 ticks_per_sec;
 970
 971         status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec);
 972
 973         if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
 974                 pr_warn("UV: unable to determine platform RTC clock frequency, guessing.\n");
 975
 976                 /* BIOS gives wrong value for clock frequency, so guess: */
 977                 sn_rtc_cycles_per_second = 1000000000000UL / 30000UL;
 978         } else {
 979                 sn_rtc_cycles_per_second = ticks_per_sec;
 980         }
 981 }
 982
 983 /*
 984  * percpu heartbeat timer
 985  */
 986 static void uv_heartbeat(struct timer_list *timer)
 987 {
 988         unsigned char bits = uv_scir_info->state;
 989
 990         /* Flip heartbeat bit: */
 991         bits ^= SCIR_CPU_HEARTBEAT;
 992
 993         /* Is this CPU idle? */
 994         if (idle_cpu(raw_smp_processor_id()))
 995                 bits &= ~SCIR_CPU_ACTIVITY;
 996         else
 997                 bits |= SCIR_CPU_ACTIVITY;
 998
 999         /* Update system controller interface reg: */
1000         uv_set_scir_bits(bits);
1001
1002         /* Enable next timer period: */
1003         mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
1004 }
1005
1006 static int uv_heartbeat_enable(unsigned int cpu)
1007 {
1008         while (!uv_cpu_scir_info(cpu)->enabled) {
1009                 struct timer_list *timer = &uv_cpu_scir_info(cpu)->timer;
1010
1011                 uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
1012                 timer_setup(timer, uv_heartbeat, TIMER_PINNED);
1013                 timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
1014                 add_timer_on(timer, cpu);
1015                 uv_cpu_scir_info(cpu)->enabled = 1;
1016
1017                 /* Also ensure that boot CPU is enabled: */
1018                 cpu = 0;
1019         }
1020         return 0;
1021 }
1022
1023 #ifdef CONFIG_HOTPLUG_CPU
1024 static int uv_heartbeat_disable(unsigned int cpu)
1025 {
1026         if (uv_cpu_scir_info(cpu)->enabled) {
1027                 uv_cpu_scir_info(cpu)->enabled = 0;
1028                 del_timer(&uv_cpu_scir_info(cpu)->timer);
1029         }
1030         uv_set_cpu_scir_bits(cpu, 0xff);
1031         return 0;
1032 }
1033
1034 static __init void uv_scir_register_cpu_notifier(void)
1035 {
1036         cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/x2apic-uvx:online",
1037                                   uv_heartbeat_enable, uv_heartbeat_disable);
1038 }
1039
1040 #else /* !CONFIG_HOTPLUG_CPU */
1041
1042 static __init void uv_scir_register_cpu_notifier(void)
1043 {
1044 }
1045
1046 static __init int uv_init_heartbeat(void)
1047 {
1048         int cpu;
1049
1050         if (is_uv_system()) {
1051                 for_each_online_cpu(cpu)
1052                         uv_heartbeat_enable(cpu);
1053         }
1054
1055         return 0;
1056 }
1057
1058 late_initcall(uv_init_heartbeat);
1059
1060 #endif /* !CONFIG_HOTPLUG_CPU */
1061
1062 /* Direct Legacy VGA I/O traffic to designated IOH */
1063 static int uv_set_vga_state(struct pci_dev *pdev, bool decode, unsigned int command_bits, u32 flags)
1064 {
1065         int domain, bus, rc;
1066
1067         if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
1068                 return 0;
1069
1070         if ((command_bits & PCI_COMMAND_IO) == 0)
1071                 return 0;
1072
1073         domain = pci_domain_nr(pdev->bus);
1074         bus = pdev->bus->number;
1075
1076         rc = uv_bios_set_legacy_vga_target(decode, domain, bus);
1077
1078         return rc;
1079 }
1080
1081 /*
1082  * Called on each CPU to initialize the per_cpu UV data area.
1083  * FIXME: hotplug not supported yet
1084  */
1085 void uv_cpu_init(void)
1086 {
1087         /* CPU 0 initialization will be done via uv_system_init. */
1088         if (smp_processor_id() == 0)
1089                 return;
1090
1091         uv_hub_info->nr_online_cpus++;
1092
1093         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
1094                 set_x2apic_extra_bits(uv_hub_info->pnode);
1095 }
1096
1097 struct mn {
1098         unsigned char   m_val;
1099         unsigned char   n_val;
1100         unsigned char   m_shift;
1101         unsigned char   n_lshift;
1102 };
1103
1104 static void get_mn(struct mn *mnp)
1105 {
1106         union uvh_rh_gam_config_mmr_u m_n_config;
1107         union uv3h_gr0_gam_gr_config_u m_gr_config;
1108
1109         /* Make sure the whole structure is well initialized: */
1110         memset(mnp, 0, sizeof(*mnp));
1111
1112         m_n_config.v    = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR);
1113         mnp->n_val      = m_n_config.s.n_skt;
1114
1115         if (is_uv4_hub()) {
1116                 mnp->m_val      = 0;
1117                 mnp->n_lshift   = 0;
1118         } else if (is_uv3_hub()) {
1119                 mnp->m_val      = m_n_config.s3.m_skt;
1120                 m_gr_config.v   = uv_read_local_mmr(UV3H_GR0_GAM_GR_CONFIG);
1121                 mnp->n_lshift   = m_gr_config.s3.m_skt;
1122         } else if (is_uv2_hub()) {
1123                 mnp->m_val      = m_n_config.s2.m_skt;
1124                 mnp->n_lshift   = mnp->m_val == 40 ? 40 : 39;
1125         } else if (is_uv1_hub()) {
1126                 mnp->m_val      = m_n_config.s1.m_skt;
1127                 mnp->n_lshift   = mnp->m_val;
1128         }
1129         mnp->m_shift = mnp->m_val ? 64 - mnp->m_val : 0;
1130 }
1131
1132 static void __init uv_init_hub_info(struct uv_hub_info_s *hi)
1133 {
1134         union uvh_node_id_u node_id;
1135         struct mn mn;
1136
1137         get_mn(&mn);
1138         hi->gpa_mask = mn.m_val ?
1139                 (1UL << (mn.m_val + mn.n_val)) - 1 :
1140                 (1UL << uv_cpuid.gpa_shift) - 1;
1141
1142         hi->m_val               = mn.m_val;
1143         hi->n_val               = mn.n_val;
1144         hi->m_shift             = mn.m_shift;
1145         hi->n_lshift            = mn.n_lshift ? mn.n_lshift : 0;
1146         hi->hub_revision        = uv_hub_info->hub_revision;
1147         hi->pnode_mask          = uv_cpuid.pnode_mask;
1148         hi->min_pnode           = _min_pnode;
1149         hi->min_socket          = _min_socket;
1150         hi->pnode_to_socket     = _pnode_to_socket;
1151         hi->socket_to_node      = _socket_to_node;
1152         hi->socket_to_pnode     = _socket_to_pnode;
1153         hi->gr_table_len        = _gr_table_len;
1154         hi->gr_table            = _gr_table;
1155
1156         node_id.v               = uv_read_local_mmr(UVH_NODE_ID);
1157         uv_cpuid.gnode_shift    = max_t(unsigned int, uv_cpuid.gnode_shift, mn.n_val);
1158         hi->gnode_extra         = (node_id.s.node_id & ~((1 << uv_cpuid.gnode_shift) - 1)) >> 1;
1159         if (mn.m_val)
1160                 hi->gnode_upper = (u64)hi->gnode_extra << mn.m_val;
1161
1162         if (uv_gp_table) {
1163                 hi->global_mmr_base     = uv_gp_table->mmr_base;
1164                 hi->global_mmr_shift    = uv_gp_table->mmr_shift;
1165                 hi->global_gru_base     = uv_gp_table->gru_base;
1166                 hi->global_gru_shift    = uv_gp_table->gru_shift;
1167                 hi->gpa_shift           = uv_gp_table->gpa_shift;
1168                 hi->gpa_mask            = (1UL << hi->gpa_shift) - 1;
1169         } else {
1170                 hi->global_mmr_base     = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) & ~UV_MMR_ENABLE;
1171                 hi->global_mmr_shift    = _UV_GLOBAL_MMR64_PNODE_SHIFT;
1172         }
1173
1174         get_lowmem_redirect(&hi->lowmem_remap_base, &hi->lowmem_remap_top);
1175
1176         hi->apic_pnode_shift = uv_cpuid.socketid_shift;
1177
1178         /* Show system specific info: */
1179         pr_info("UV: N:%d M:%d m_shift:%d n_lshift:%d\n", hi->n_val, hi->m_val, hi->m_shift, hi->n_lshift);
1180         pr_info("UV: gpa_mask/shift:0x%lx/%d pnode_mask:0x%x apic_pns:%d\n", hi->gpa_mask, hi->gpa_shift, hi->pnode_mask, hi->apic_pnode_shift);
1181         pr_info("UV: mmr_base/shift:0x%lx/%ld gru_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift, hi->global_gru_base, hi->global_gru_shift);
1182         pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
1183 }
1184
1185 static void __init decode_gam_params(unsigned long ptr)
1186 {
1187         uv_gp_table = (struct uv_gam_parameters *)ptr;
1188
1189         pr_info("UV: GAM Params...\n");
1190         pr_info("UV: mmr_base/shift:0x%llx/%d gru_base/shift:0x%llx/%d gpa_shift:%d\n",
1191                 uv_gp_table->mmr_base, uv_gp_table->mmr_shift,
1192                 uv_gp_table->gru_base, uv_gp_table->gru_shift,
1193                 uv_gp_table->gpa_shift);
1194 }
1195
1196 static void __init decode_gam_rng_tbl(unsigned long ptr)
1197 {
1198         struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
1199         unsigned long lgre = 0;
1200         int index = 0;
1201         int sock_min = 999999, pnode_min = 99999;
1202         int sock_max = -1, pnode_max = -1;
1203
1204         uv_gre_table = gre;
1205         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1206                 unsigned long size = ((unsigned long)(gre->limit - lgre)
1207                                         << UV_GAM_RANGE_SHFT);
1208                 int order = 0;
1209                 char suffix[] = " KMGTPE";
1210                 int flag = ' ';
1211
1212                 while (size > 9999 && order < sizeof(suffix)) {
1213                         size /= 1024;
1214                         order++;
1215                 }
1216
1217                 /* adjust max block size to current range start */
1218                 if (gre->type == 1 || gre->type == 2)
1219                         if (adj_blksize(lgre))
1220                                 flag = '*';
1221
1222                 if (!index) {
1223                         pr_info("UV: GAM Range Table...\n");
1224                         pr_info("UV:  # %20s %14s %6s %4s %5s %3s %2s\n", "Range", "", "Size", "Type", "NASID", "SID", "PN");
1225                 }
1226                 pr_info("UV: %2d: 0x%014lx-0x%014lx%c %5lu%c %3d   %04x  %02x %02x\n",
1227                         index++,
1228                         (unsigned long)lgre << UV_GAM_RANGE_SHFT,
1229                         (unsigned long)gre->limit << UV_GAM_RANGE_SHFT,
1230                         flag, size, suffix[order],
1231                         gre->type, gre->nasid, gre->sockid, gre->pnode);
1232
1233                 /* update to next range start */
1234                 lgre = gre->limit;
1235                 if (sock_min > gre->sockid)
1236                         sock_min = gre->sockid;
1237                 if (sock_max < gre->sockid)
1238                         sock_max = gre->sockid;
1239                 if (pnode_min > gre->pnode)
1240                         pnode_min = gre->pnode;
1241                 if (pnode_max < gre->pnode)
1242                         pnode_max = gre->pnode;
1243         }
1244         _min_socket     = sock_min;
1245         _max_socket     = sock_max;
1246         _min_pnode      = pnode_min;
1247         _max_pnode      = pnode_max;
1248         _gr_table_len   = index;
1249
1250         pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x) pnodes(min:%x,max:%x)\n", index, _min_socket, _max_socket, _min_pnode, _max_pnode);
1251 }
1252
1253 static int __init decode_uv_systab(void)
1254 {
1255         struct uv_systab *st;
1256         int i;
1257
1258         if (uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE)
1259                 return 0;       /* No extended UVsystab required */
1260
1261         st = uv_systab;
1262         if ((!st) || (st->revision < UV_SYSTAB_VERSION_UV4_LATEST)) {
1263                 int rev = st ? st->revision : 0;
1264
1265                 pr_err("UV: BIOS UVsystab version(%x) mismatch, expecting(%x)\n", rev, UV_SYSTAB_VERSION_UV4_LATEST);
1266                 pr_err("UV: Cannot support UV operations, switching to generic PC\n");
1267                 uv_system_type = UV_NONE;
1268
1269                 return -EINVAL;
1270         }
1271
1272         for (i = 0; st->entry[i].type != UV_SYSTAB_TYPE_UNUSED; i++) {
1273                 unsigned long ptr = st->entry[i].offset;
1274
1275                 if (!ptr)
1276                         continue;
1277
1278                 ptr = ptr + (unsigned long)st;
1279
1280                 switch (st->entry[i].type) {
1281                 case UV_SYSTAB_TYPE_GAM_PARAMS:
1282                         decode_gam_params(ptr);
1283                         break;
1284
1285                 case UV_SYSTAB_TYPE_GAM_RNG_TBL:
1286                         decode_gam_rng_tbl(ptr);
1287                         break;
1288                 }
1289         }
1290         return 0;
1291 }
1292
1293 /*
1294  * Set up physical blade translations from UVH_NODE_PRESENT_TABLE
1295  * .. NB: UVH_NODE_PRESENT_TABLE is going away,
1296  * .. being replaced by GAM Range Table
1297  */
1298 static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
1299 {
1300         int i, uv_pb = 0;
1301
1302         pr_info("UV: NODE_PRESENT_DEPTH = %d\n", UVH_NODE_PRESENT_TABLE_DEPTH);
1303         for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
1304                 unsigned long np;
1305
1306                 np = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
1307                 if (np)
1308                         pr_info("UV: NODE_PRESENT(%d) = 0x%016lx\n", i, np);
1309
1310                 uv_pb += hweight64(np);
1311         }
1312         if (uv_possible_blades != uv_pb)
1313                 uv_possible_blades = uv_pb;
1314 }
1315
1316 static void __init build_socket_tables(void)
1317 {
1318         struct uv_gam_range_entry *gre = uv_gre_table;
1319         int num, nump;
1320         int cpu, i, lnid;
1321         int minsock = _min_socket;
1322         int maxsock = _max_socket;
1323         int minpnode = _min_pnode;
1324         int maxpnode = _max_pnode;
1325         size_t bytes;
1326
1327         if (!gre) {
1328                 if (is_uv1_hub() || is_uv2_hub() || is_uv3_hub()) {
1329                         pr_info("UV: No UVsystab socket table, ignoring\n");
1330                         return;
1331                 }
1332                 pr_crit("UV: Error: UVsystab address translations not available!\n");
1333                 BUG();
1334         }
1335
1336         /* Build socket id -> node id, pnode */
1337         num = maxsock - minsock + 1;
1338         bytes = num * sizeof(_socket_to_node[0]);
1339         _socket_to_node = kmalloc(bytes, GFP_KERNEL);
1340         _socket_to_pnode = kmalloc(bytes, GFP_KERNEL);
1341
1342         nump = maxpnode - minpnode + 1;
1343         bytes = nump * sizeof(_pnode_to_socket[0]);
1344         _pnode_to_socket = kmalloc(bytes, GFP_KERNEL);
1345         BUG_ON(!_socket_to_node || !_socket_to_pnode || !_pnode_to_socket);
1346
1347         for (i = 0; i < num; i++)
1348                 _socket_to_node[i] = _socket_to_pnode[i] = SOCK_EMPTY;
1349
1350         for (i = 0; i < nump; i++)
1351                 _pnode_to_socket[i] = SOCK_EMPTY;
1352
1353         /* Fill in pnode/node/addr conversion list values: */
1354         pr_info("UV: GAM Building socket/pnode conversion tables\n");
1355         for (; gre->type != UV_GAM_RANGE_TYPE_UNUSED; gre++) {
1356                 if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
1357                         continue;
1358                 i = gre->sockid - minsock;
1359                 /* Duplicate: */
1360                 if (_socket_to_pnode[i] != SOCK_EMPTY)
1361                         continue;
1362                 _socket_to_pnode[i] = gre->pnode;
1363
1364                 i = gre->pnode - minpnode;
1365                 _pnode_to_socket[i] = gre->sockid;
1366
1367                 pr_info("UV: sid:%02x type:%d nasid:%04x pn:%02x pn2s:%2x\n",
1368                         gre->sockid, gre->type, gre->nasid,
1369                         _socket_to_pnode[gre->sockid - minsock],
1370                         _pnode_to_socket[gre->pnode - minpnode]);
1371         }
1372
1373         /* Set socket -> node values: */
1374         lnid = NUMA_NO_NODE;
1375         for_each_present_cpu(cpu) {
1376                 int nid = cpu_to_node(cpu);
1377                 int apicid, sockid;
1378
1379                 if (lnid == nid)
1380                         continue;
1381                 lnid = nid;
1382                 apicid = per_cpu(x86_cpu_to_apicid, cpu);
1383                 sockid = apicid >> uv_cpuid.socketid_shift;
1384                 _socket_to_node[sockid - minsock] = nid;
1385                 pr_info("UV: sid:%02x: apicid:%04x node:%2d\n",
1386                         sockid, apicid, nid);
1387         }
1388
1389         /* Set up physical blade to pnode translation from GAM Range Table: */
1390         bytes = num_possible_nodes() * sizeof(_node_to_pnode[0]);
1391         _node_to_pnode = kmalloc(bytes, GFP_KERNEL);
1392         BUG_ON(!_node_to_pnode);
1393
1394         for (lnid = 0; lnid < num_possible_nodes(); lnid++) {
1395                 unsigned short sockid;
1396
1397                 for (sockid = minsock; sockid <= maxsock; sockid++) {
1398                         if (lnid == _socket_to_node[sockid - minsock]) {
1399                                 _node_to_pnode[lnid] = _socket_to_pnode[sockid - minsock];
1400                                 break;
1401                         }
1402                 }
1403                 if (sockid > maxsock) {
1404                         pr_err("UV: socket for node %d not found!\n", lnid);
1405                         BUG();
1406                 }
1407         }
1408
1409         /*
1410          * If socket id == pnode or socket id == node for all nodes,
1411          *   system runs faster by removing corresponding conversion table.
1412          */
1413         pr_info("UV: Checking socket->node/pnode for identity maps\n");
1414         if (minsock == 0) {
1415                 for (i = 0; i < num; i++)
1416                         if (_socket_to_node[i] == SOCK_EMPTY || i != _socket_to_node[i])
1417                                 break;
1418                 if (i >= num) {
1419                         kfree(_socket_to_node);
1420                         _socket_to_node = NULL;
1421                         pr_info("UV: 1:1 socket_to_node table removed\n");
1422                 }
1423         }
1424         if (minsock == minpnode) {
1425                 for (i = 0; i < num; i++)
1426                         if (_socket_to_pnode[i] != SOCK_EMPTY &&
1427                                 _socket_to_pnode[i] != i + minpnode)
1428                                 break;
1429                 if (i >= num) {
1430                         kfree(_socket_to_pnode);
1431                         _socket_to_pnode = NULL;
1432                         pr_info("UV: 1:1 socket_to_pnode table removed\n");
1433                 }
1434         }
1435 }
1436
1437 static void __init uv_system_init_hub(void)
1438 {
1439         struct uv_hub_info_s hub_info = {0};
1440         int bytes, cpu, nodeid;
1441         unsigned short min_pnode = 9999, max_pnode = 0;
1442         char *hub = is_uv4_hub() ? "UV400" :
1443                     is_uv3_hub() ? "UV300" :
1444                     is_uv2_hub() ? "UV2000/3000" :
1445                     is_uv1_hub() ? "UV100/1000" : NULL;
1446
1447         if (!hub) {
1448                 pr_err("UV: Unknown/unsupported UV hub\n");
1449                 return;
1450         }
1451         pr_info("UV: Found %s hub\n", hub);
1452
1453         map_low_mmrs();
1454
1455         /* Get uv_systab for decoding: */
1456         uv_bios_init();
1457
1458         /* If there's an UVsystab problem then abort UV init: */
1459         if (decode_uv_systab() < 0)
1460                 return;
1461
1462         build_socket_tables();
1463         build_uv_gr_table();
1464         set_block_size();
1465         uv_init_hub_info(&hub_info);
1466         uv_possible_blades = num_possible_nodes();
1467         if (!_node_to_pnode)
1468                 boot_init_possible_blades(&hub_info);
1469
1470         /* uv_num_possible_blades() is really the hub count: */
1471         pr_info("UV: Found %d hubs, %d nodes, %d CPUs\n", uv_num_possible_blades(), num_possible_nodes(), num_possible_cpus());
1472
1473         uv_bios_get_sn_info(0, &uv_type, &sn_partition_id, &sn_coherency_id, &sn_region_size, &system_serial_number);
1474         hub_info.coherency_domain_number = sn_coherency_id;
1475         uv_rtc_init();
1476
1477         bytes = sizeof(void *) * uv_num_possible_blades();
1478         __uv_hub_info_list = kzalloc(bytes, GFP_KERNEL);
1479         BUG_ON(!__uv_hub_info_list);
1480
1481         bytes = sizeof(struct uv_hub_info_s);
1482         for_each_node(nodeid) {
1483                 struct uv_hub_info_s *new_hub;
1484
1485                 if (__uv_hub_info_list[nodeid]) {
1486                         pr_err("UV: Node %d UV HUB already initialized!?\n", nodeid);
1487                         BUG();
1488                 }
1489
1490                 /* Allocate new per hub info list */
1491                 new_hub = (nodeid == 0) ?  &uv_hub_info_node0 : kzalloc_node(bytes, GFP_KERNEL, nodeid);
1492                 BUG_ON(!new_hub);
1493                 __uv_hub_info_list[nodeid] = new_hub;
1494                 new_hub = uv_hub_info_list(nodeid);
1495                 BUG_ON(!new_hub);
1496                 *new_hub = hub_info;
1497
1498                 /* Use information from GAM table if available: */
1499                 if (_node_to_pnode)
1500                         new_hub->pnode = _node_to_pnode[nodeid];
1501                 else /* Or fill in during CPU loop: */
1502                         new_hub->pnode = 0xffff;
1503
1504                 new_hub->numa_blade_id = uv_node_to_blade_id(nodeid);
1505                 new_hub->memory_nid = NUMA_NO_NODE;
1506                 new_hub->nr_possible_cpus = 0;
1507                 new_hub->nr_online_cpus = 0;
1508         }
1509
1510         /* Initialize per CPU info: */
1511         for_each_possible_cpu(cpu) {
1512                 int apicid = per_cpu(x86_cpu_to_apicid, cpu);
1513                 int numa_node_id;
1514                 unsigned short pnode;
1515
1516                 nodeid = cpu_to_node(cpu);
1517                 numa_node_id = numa_cpu_node(cpu);
1518                 pnode = uv_apicid_to_pnode(apicid);
1519
1520                 uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list(nodeid);
1521                 uv_cpu_info_per(cpu)->blade_cpu_id = uv_cpu_hub_info(cpu)->nr_possible_cpus++;
1522                 if (uv_cpu_hub_info(cpu)->memory_nid == NUMA_NO_NODE)
1523                         uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
1524
1525                 /* Init memoryless node: */
1526                 if (nodeid != numa_node_id &&
1527                     uv_hub_info_list(numa_node_id)->pnode == 0xffff)
1528                         uv_hub_info_list(numa_node_id)->pnode = pnode;
1529                 else if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
1530                         uv_cpu_hub_info(cpu)->pnode = pnode;
1531
1532                 uv_cpu_scir_info(cpu)->offset = uv_scir_offset(apicid);
1533         }
1534
1535         for_each_node(nodeid) {
1536                 unsigned short pnode = uv_hub_info_list(nodeid)->pnode;
1537
1538                 /* Add pnode info for pre-GAM list nodes without CPUs: */
1539                 if (pnode == 0xffff) {
1540                         unsigned long paddr;
1541
1542                         paddr = node_start_pfn(nodeid) << PAGE_SHIFT;
1543                         pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
1544                         uv_hub_info_list(nodeid)->pnode = pnode;
1545                 }
1546                 min_pnode = min(pnode, min_pnode);
1547                 max_pnode = max(pnode, max_pnode);
1548                 pr_info("UV: UVHUB node:%2d pn:%02x nrcpus:%d\n",
1549                         nodeid,
1550                         uv_hub_info_list(nodeid)->pnode,
1551                         uv_hub_info_list(nodeid)->nr_possible_cpus);
1552         }
1553
1554         pr_info("UV: min_pnode:%02x max_pnode:%02x\n", min_pnode, max_pnode);
1555         map_gru_high(max_pnode);
1556         map_mmr_high(max_pnode);
1557         map_mmioh_high(min_pnode, max_pnode);
1558
1559         uv_nmi_setup();
1560         uv_cpu_init();
1561         uv_scir_register_cpu_notifier();
1562         proc_mkdir("sgi_uv", NULL);
1563
1564         /* Register Legacy VGA I/O redirection handler: */
1565         pci_register_set_vga_state(uv_set_vga_state);
1566
1567         /*
1568          * For a kdump kernel the reset must be BOOT_ACPI, not BOOT_EFI, as
1569          * EFI is not enabled in the kdump kernel:
1570          */
1571         if (is_kdump_kernel())
1572                 reboot_type = BOOT_ACPI;
1573 }
1574
1575 /*
1576  * There is a small amount of UV specific code needed to initialize a
1577  * UV system that does not have a "UV HUB" (referred to as "hubless").
1578  */
1579 void __init uv_system_init(void)
1580 {
1581         if (likely(!is_uv_system() && !is_uv_hubless()))
1582                 return;
1583
1584         if (is_uv_system())
1585                 uv_system_init_hub();
1586         else
1587                 uv_nmi_setup_hubless();
1588 }
1589
1590 apic_driver(apic_x2apic_uv_x);