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 Silicon Graphics, Inc. All rights reserved.
   9  */
  10
  11 #include <linux/threads.h>
  12 #include <linux/cpumask.h>
  13 #include <linux/string.h>
  14 #include <linux/kernel.h>
  15 #include <linux/ctype.h>
  16 #include <linux/init.h>
  17 #include <linux/sched.h>
  18 #include <linux/bootmem.h>
  19 #include <linux/module.h>
  20 #include <asm/smp.h>
  21 #include <asm/ipi.h>
  22 #include <asm/genapic.h>
  23 #include <asm/uv/uv_mmrs.h>
  24 #include <asm/uv/uv_hub.h>
  25
  26 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  27 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
  28
  29 struct uv_blade_info *uv_blade_info;
  30 EXPORT_SYMBOL_GPL(uv_blade_info);
  31
  32 short *uv_node_to_blade;
  33 EXPORT_SYMBOL_GPL(uv_node_to_blade);
  34
  35 short *uv_cpu_to_blade;
  36 EXPORT_SYMBOL_GPL(uv_cpu_to_blade);
  37
  38 short uv_possible_blades;
  39 EXPORT_SYMBOL_GPL(uv_possible_blades);
  40
  41 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
  42
  43 static cpumask_t uv_target_cpus(void)
  44 {
  45         return cpumask_of_cpu(0);
  46 }
  47
  48 static cpumask_t uv_vector_allocation_domain(int cpu)
  49 {
  50         cpumask_t domain = CPU_MASK_NONE;
  51         cpu_set(cpu, domain);
  52         return domain;
  53 }
  54
  55 int uv_wakeup_secondary(int phys_apicid, unsigned int start_rip)
  56 {
  57         unsigned long val;
  58         int nasid;
  59
  60         nasid = uv_apicid_to_nasid(phys_apicid);
  61         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
  62             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
  63             (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
  64             APIC_DM_INIT;
  65         uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
  66         mdelay(10);
  67
  68         val = (1UL << UVH_IPI_INT_SEND_SHFT) |
  69             (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) |
  70             (((long)start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) |
  71             APIC_DM_STARTUP;
  72         uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
  73         return 0;
  74 }
  75
  76 static void uv_send_IPI_one(int cpu, int vector)
  77 {
  78         unsigned long val, apicid, lapicid;
  79         int nasid;
  80
  81         apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
  82         lapicid = apicid & 0x3f;                /* ZZZ macro needed */
  83         nasid = uv_apicid_to_nasid(apicid);
  84         val =
  85             (1UL << UVH_IPI_INT_SEND_SHFT) | (lapicid <<
  86                                               UVH_IPI_INT_APIC_ID_SHFT) |
  87             (vector << UVH_IPI_INT_VECTOR_SHFT);
  88         uv_write_global_mmr64(nasid, UVH_IPI_INT, val);
  89 }
  90
  91 static void uv_send_IPI_mask(cpumask_t mask, int vector)
  92 {
  93         unsigned int cpu;
  94
  95         for (cpu = 0; cpu < NR_CPUS; ++cpu)
  96                 if (cpu_isset(cpu, mask))
  97                         uv_send_IPI_one(cpu, vector);
  98 }
  99
 100 static void uv_send_IPI_allbutself(int vector)
 101 {
 102         cpumask_t mask = cpu_online_map;
 103
 104         cpu_clear(smp_processor_id(), mask);
 105
 106         if (!cpus_empty(mask))
 107                 uv_send_IPI_mask(mask, vector);
 108 }
 109
 110 static void uv_send_IPI_all(int vector)
 111 {
 112         uv_send_IPI_mask(cpu_online_map, vector);
 113 }
 114
 115 static int uv_apic_id_registered(void)
 116 {
 117         return 1;
 118 }
 119
 120 static unsigned int uv_cpu_mask_to_apicid(cpumask_t cpumask)
 121 {
 122         int cpu;
 123
 124         /*
 125          * We're using fixed IRQ delivery, can only return one phys APIC ID.
 126          * May as well be the first.
 127          */
 128         cpu = first_cpu(cpumask);
 129         if ((unsigned)cpu < NR_CPUS)
 130                 return per_cpu(x86_cpu_to_apicid, cpu);
 131         else
 132                 return BAD_APICID;
 133 }
 134
 135 static unsigned int phys_pkg_id(int index_msb)
 136 {
 137         return GET_APIC_ID(read_apic_id()) >> index_msb;
 138 }
 139
 140 #ifdef ZZZ              /* Needs x2apic patch */
 141 static void uv_send_IPI_self(int vector)
 142 {
 143         apic_write(APIC_SELF_IPI, vector);
 144 }
 145 #endif
 146
 147 struct genapic apic_x2apic_uv_x = {
 148         .name = "UV large system",
 149         .int_delivery_mode = dest_Fixed,
 150         .int_dest_mode = (APIC_DEST_PHYSICAL != 0),
 151         .target_cpus = uv_target_cpus,
 152         .vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
 153         .apic_id_registered = uv_apic_id_registered,
 154         .send_IPI_all = uv_send_IPI_all,
 155         .send_IPI_allbutself = uv_send_IPI_allbutself,
 156         .send_IPI_mask = uv_send_IPI_mask,
 157         /* ZZZ.send_IPI_self = uv_send_IPI_self, */
 158         .cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
 159         .phys_pkg_id = phys_pkg_id,     /* Fixme ZZZ */
 160 };
 161
 162 static __cpuinit void set_x2apic_extra_bits(int nasid)
 163 {
 164         __get_cpu_var(x2apic_extra_bits) = ((nasid >> 1) << 6);
 165 }
 166
 167 /*
 168  * Called on boot cpu.
 169  */
 170 static __init void uv_system_init(void)
 171 {
 172         union uvh_si_addr_map_config_u m_n_config;
 173         int bytes, nid, cpu, lcpu, nasid, last_nasid, blade;
 174         unsigned long mmr_base;
 175
 176         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
 177         mmr_base =
 178             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
 179             ~UV_MMR_ENABLE;
 180         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
 181
 182         last_nasid = -1;
 183         for_each_possible_cpu(cpu) {
 184                 nid = cpu_to_node(cpu);
 185                 nasid = uv_apicid_to_nasid(per_cpu(x86_cpu_to_apicid, cpu));
 186                 if (nasid != last_nasid)
 187                         uv_possible_blades++;
 188                 last_nasid = nasid;
 189         }
 190         printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
 191
 192         bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 193         uv_blade_info = alloc_bootmem_pages(bytes);
 194
 195         bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
 196         uv_node_to_blade = alloc_bootmem_pages(bytes);
 197         memset(uv_node_to_blade, 255, bytes);
 198
 199         bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
 200         uv_cpu_to_blade = alloc_bootmem_pages(bytes);
 201         memset(uv_cpu_to_blade, 255, bytes);
 202
 203         last_nasid = -1;
 204         blade = -1;
 205         lcpu = -1;
 206         for_each_possible_cpu(cpu) {
 207                 nid = cpu_to_node(cpu);
 208                 nasid = uv_apicid_to_nasid(per_cpu(x86_cpu_to_apicid, cpu));
 209                 if (nasid != last_nasid) {
 210                         blade++;
 211                         lcpu = -1;
 212                         uv_blade_info[blade].nr_posible_cpus = 0;
 213                         uv_blade_info[blade].nr_online_cpus = 0;
 214                 }
 215                 last_nasid = nasid;
 216                 lcpu++;
 217
 218                 uv_cpu_hub_info(cpu)->m_val = m_n_config.s.m_skt;
 219                 uv_cpu_hub_info(cpu)->n_val = m_n_config.s.n_skt;
 220                 uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 221                 uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 222                 uv_cpu_hub_info(cpu)->local_nasid = nasid;
 223                 uv_cpu_hub_info(cpu)->gnode_upper =
 224                     nasid & ~((1 << uv_hub_info->n_val) - 1);
 225                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 226                 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
 227                 uv_blade_info[blade].nasid = nasid;
 228                 uv_blade_info[blade].nr_posible_cpus++;
 229                 uv_node_to_blade[nid] = blade;
 230                 uv_cpu_to_blade[cpu] = blade;
 231
 232                 printk(KERN_DEBUG "UV cpu %d, apicid 0x%x, nasid %d, nid %d\n",
 233                        cpu, per_cpu(x86_cpu_to_apicid, cpu), nasid, nid);
 234                 printk(KERN_DEBUG "UV   lcpu %d, blade %d\n", lcpu, blade);
 235         }
 236 }
 237
 238 /*
 239  * Called on each cpu to initialize the per_cpu UV data area.
 240  */
 241 void __cpuinit uv_cpu_init(void)
 242 {
 243         if (!uv_node_to_blade)
 244                 uv_system_init();
 245
 246         uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
 247
 248         if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
 249                 set_x2apic_extra_bits(uv_hub_info->local_nasid);
 250 }