SAFE public projects git trees. - safe/jmp/linux-2.6/blob - arch/x86/kernel/genx2apic_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) 2007-2008 Silicon Graphics, Inc. All rights reserved.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/threads.h>
  13 #include <linux/cpumask.h>
  14 #include <linux/string.h>
  15 #include <linux/kernel.h>
  16 #include <linux/ctype.h>
  17 #include <linux/init.h>
  18 #include <linux/sched.h>
  19 #include <linux/bootmem.h>
  20 #include <linux/module.h>
  21 #include <linux/hardirq.h>
  22 #include <asm/smp.h>
  23 #include <asm/ipi.h>
  24 #include <asm/genapic.h>
  25 #include <asm/pgtable.h>
  26 #include <asm/uv/uv_mmrs.h>
  27 #include <asm/uv/uv_hub.h>
  28
  29 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  30 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
  31
  32 struct uv_blade_info *uv_blade_info;
  33 EXPORT_SYMBOL_GPL(uv_blade_info);
  34
  35 short *uv_node_to_blade;
  36 EXPORT_SYMBOL_GPL(uv_node_to_blade);
  37
  38 short *uv_cpu_to_blade;
  39 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
  40
  41 short uv_possible_blades;
  42 EXPORT_SYMBOL_GPL(uv_possible_blades);
  43
  44 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
  45
  46 static cpumask_t uv_target_cpus(void)
  47 {
  48         return cpumask_of_cpu(0);
  49 }
  50
  51 static cpumask_t uv_vector_allocation_domain(int cpu)
  52 {
  53         cpumask_t domain = CPU_MASK_NONE;
  54         cpu_set(cpu, domain);
  55         return domain;
  56 }
  57
  58 int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
  59 {
  60         unsigned long val;
  61         int pnode;
  62
  63         pnode = uv_apicid_to_pnode(phys_apicid);
  64         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
  65             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
  66             (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
  67             APIC_DM_INIT;
  68         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
  69         mdelay(10);
  70
  71         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
  72             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
  73             (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
  74             APIC_DM_STARTUP;
  75         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
  76         return 0;
  77 }
  78
  79 static void uv_send_IPI_one(int cpu, int vector)
  80 {
  81         unsigned long val, apicid, lapicid;
  82         int pnode;
  83
  84         apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
  85         lapicid = apicid & 0x3f;                /* ZZZ macro needed */
  86         pnode = uv_apicid_to_pnode(apicid);
  87         val =
  88             (1UL << UVH_IPI_INT_SEND_SHFT) | (lapicid <<
  89                                               UVH_IPI_INT_APIC_ID_SHFT) |
  90             (vector << UVH_IPI_INT_VECTOR_SHFT);
  91         uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
  92 }
  93
  94 static void uv_send_IPI_mask(cpumask_t mask, int vector)
  95 {
  96         unsigned int cpu;
  97
  98         for (cpu = 0; cpu < NR_CPUS; ++cpu)
  99                 if (cpu_isset(cpu, mask))
 100                         uv_send_IPI_one(cpu, vector);
 101 }
 102
 103 static void uv_send_IPI_allbutself(int vector)
 104 {
 105         cpumask_t mask = cpu_online_map;
 106
 107         cpu_clear(smp_processor_id(), mask);
 108
 109         if (!cpus_empty(mask))
 110                 uv_send_IPI_mask(mask, vector);
 111 }
 112
 113 static void uv_send_IPI_all(int vector)
 114 {
 115         uv_send_IPI_mask(cpu_online_map, vector);
 116 }
 117
 118 static int uv_apic_id_registered(void)
 119 {
 120         return 1;
 121 }
 122
 123 static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
 124 {
 125         int cpu;
 126
 127         /*
 128          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 129          * May as well be the first.
 130          */
 131         cpu = first_cpu(cpumask);
 132         if ((unsigned)cpu < NR_CPUS)
 133                 return per_cpu(x86_cpu_to_apicid, cpu);
 134         else
 135                 return BAD_APICID;
 136 }
 137
 138 static unsigned int uv_read_apic_id(void)
 139 {
 140         unsigned int id;
 141
 142         WARN_ON(preemptible() && num_online_cpus() > 1);
 143         id = apic_read(APIC_ID) | __get_cpu_var(x2apic_extra_bits);
 144
 145         return id;
 146 }
 147
 148 static unsigned int phys_pkg_id(int index_msb)
 149 {
 150         return uv_read_apic_id() >> index_msb;
 151 }
 152
 153 #ifdef ZZZ              /* Needs x2apic patch */
 154 static void uv_send_IPI_self(int vector)
 155 {
 156         apic_write(APIC_SELF_IPI, vector);
 157 }
 158 #endif
 159
 160 struct genapic apic_x2apic_uv_x = {
 161         .name = "UV large system",
 162         .int_delivery_mode = dest_Fixed,
 163         .int_dest_mode = (APIC_DEST_PHYSICAL != 0),
 164         .target_cpus = uv_target_cpus,
 165         .vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
 166         .apic_id_registered = uv_apic_id_registered,
 167         .send_IPI_all = uv_send_IPI_all,
 168         .send_IPI_allbutself = uv_send_IPI_allbutself,
 169         .send_IPI_mask = uv_send_IPI_mask,
 170         /* ZZZ.send_IPI_self = uv_send_IPI_self, */
 171         .cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
 172         .phys_pkg_id = phys_pkg_id,     /* Fixme ZZZ */
 173         .read_apic_id = uv_read_apic_id,
 174 };
 175
 176 static __cpuinit void set_x2apic_extra_bits(int pnode)
 177 {
 178         __get_cpu_var(x2apic_extra_bits) = (pnode << 6);
 179 }
 180
 181 /*
 182  * Called on boot cpu.
 183  */
 184 static __init int boot_pnode_to_blade(int pnode)
 185 {
 186         int blade;
 187
 188         for (blade = 0; blade < uv_num_possible_blades(); blade++)
 189                 if (pnode == uv_blade_info[blade].pnode)
 190                         return blade;
 191         BUG();
 192 }
 193
 194 struct redir_addr {
 195         unsigned long redirect;
 196         unsigned long alias;
 197 };
 198
 199 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
 200
 201 static __initdata struct redir_addr redir_addrs[] = {
 202         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
 203         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
 204         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
 205 };
 206
 207 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 208 {
 209         union uvh_si_alias0_overlay_config_u alias;
 210         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
 211         int i;
 212
 213         for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
 214                 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
 215                 if (alias.s.base == 0) {
 216                         *size = (1UL << alias.s.m_alias);
 217                         redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
 218                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
 219                         return;
 220                 }
 221         }
 222         BUG();
 223 }
 224
 225 static __init void map_low_mmrs(void)
 226 {
 227         init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
 228         init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
 229 }
 230
 231 enum map_type {map_wb, map_uc};
 232
 233 static void map_high(char *id, unsigned long base, int shift, enum map_type map_type)
 234 {
 235         unsigned long bytes, paddr;
 236
 237         paddr = base << shift;
 238         bytes = (1UL << shift);
 239         printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
 240                                                 paddr + bytes);
 241         if (map_type == map_uc)
 242                 init_extra_mapping_uc(paddr, bytes);
 243         else
 244                 init_extra_mapping_wb(paddr, bytes);
 245
 246 }
 247 static __init void map_gru_high(int max_pnode)
 248 {
 249         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
 250         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 251
 252         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 253         if (gru.s.enable)
 254                 map_high("GRU", gru.s.base, shift, map_wb);
 255 }
 256
 257 static __init void map_config_high(int max_pnode)
 258 {
 259         union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
 260         int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
 261
 262         cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
 263         if (cfg.s.enable)
 264                 map_high("CONFIG", cfg.s.base, shift, map_uc);
 265 }
 266
 267 static __init void map_mmr_high(int max_pnode)
 268 {
 269         union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
 270         int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
 271
 272         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 273         if (mmr.s.enable)
 274                 map_high("MMR", mmr.s.base, shift, map_uc);
 275 }
 276
 277 static __init void map_mmioh_high(int max_pnode)
 278 {
 279         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
 280         int shift = UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
 281
 282         mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
 283         if (mmioh.s.enable)
 284                 map_high("MMIOH", mmioh.s.base, shift, map_uc);
 285 }
 286
 287 static __init void uv_system_init(void)
 288 {
 289         union uvh_si_addr_map_config_u m_n_config;
 290         union uvh_node_id_u node_id;
 291         unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
 292         int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
 293         int max_pnode = 0;
 294         unsigned long mmr_base, present;
 295
 296         map_low_mmrs();
 297
 298         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 299         m_val = m_n_config.s.m_skt;
 300         n_val = m_n_config.s.n_skt;
 301         mmr_base =
 302             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 303             ~UV_MMR_ENABLE;
 304         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
 305
 306         for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
 307                 uv_possible_blades +=
 308                   hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 309         printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
 310
 311         bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 312         uv_blade_info = alloc_bootmem_pages(bytes);
 313
 314         get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
 315
 316         bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 317         uv_node_to_blade = alloc_bootmem_pages(bytes);
 318         memset(uv_node_to_blade, 255, bytes);
 319
 320         bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 321         uv_cpu_to_blade = alloc_bootmem_pages(bytes);
 322         memset(uv_cpu_to_blade, 255, bytes);
 323
 324         blade = 0;
 325         for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
 326                 present = uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
 327                 for (j = 0; j < 64; j++) {
 328                         if (!test_bit(j, &present))
 329                                 continue;
 330                         uv_blade_info[blade].pnode = (i * 64 + j);
 331                         uv_blade_info[blade].nr_possible_cpus = 0;
 332                         uv_blade_info[blade].nr_online_cpus = 0;
 333                         blade++;
 334                 }
 335         }
 336
 337         node_id.v = uv_read_local_mmr(UVH_NODE_ID);
 338         gnode_upper = (((unsigned long)node_id.s.node_id) &
 339                        ~((1 << n_val) - 1)) << m_val;
 340
 341         for_each_present_cpu(cpu) {
 342                 nid = cpu_to_node(cpu);
 343                 pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
 344                 blade = boot_pnode_to_blade(pnode);
 345                 lcpu = uv_blade_info[blade].nr_possible_cpus;
 346                 uv_blade_info[blade].nr_possible_cpus++;
 347
 348                 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
 349                 uv_cpu_hub_info(cpu)->lowmem_remap_top =
 350                                         lowmem_redir_base + lowmem_redir_size;
 351                 uv_cpu_hub_info(cpu)->m_val = m_val;
 352                 uv_cpu_hub_info(cpu)->n_val = m_val;
 353                 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 354                 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 355                 uv_cpu_hub_info(cpu)->pnode = pnode;
 356                 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) - 1;
 357                 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
 358                 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
 359                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 360                 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
 361                 uv_node_to_blade[nid] = blade;
 362                 uv_cpu_to_blade[cpu] = blade;
 363                 max_pnode = max(pnode, max_pnode);
 364
 365                 printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
 366                         "lcpu %d, blade %d\n",
 367                         cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
 368                         lcpu, blade);
 369         }
 370
 371         map_gru_high(max_pnode);
 372         map_mmr_high(max_pnode);
 373         map_config_high(max_pnode);
 374         map_mmioh_high(max_pnode);
 375 }
 376
 377 /*
 378  * Called on each cpu to initialize the per_cpu UV data area.
 379  *      ZZZ hotplug not supported yet
 380  */
 381 void __cpuinit uv_cpu_init(void)
 382 {
 383         if (!uv_node_to_blade)
 384                 uv_system_init();
 385
 386         uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
 387
 388         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 389                 set_x2apic_extra_bits(uv_hub_info->pnode);
 390 }