arch/x86/kernel/apic/apic_numachip.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  * Numascale NumaConnect-Specific APIC Code
   7  *
   8  * Copyright (C) 2011 Numascale AS. All rights reserved.
   9  *
  10  * Send feedback to <support@numascale.com>
  11  *
  12  */
  13 #include <linux/types.h>
  14 #include <linux/init.h>
  15 #include <linux/pgtable.h>
  16
  17 #include <asm/numachip/numachip.h>
  18 #include <asm/numachip/numachip_csr.h>
  19
  20
  21 #include "local.h"
  22
  23 u8 numachip_system __read_mostly;
  24 static const struct apic apic_numachip1;
  25 static const struct apic apic_numachip2;
  26 static void (*numachip_apic_icr_write)(int apicid, unsigned int val) __read_mostly;
  27
  28 static u32 numachip1_get_apic_id(u32 x)
  29 {
  30         unsigned long value;
  31         unsigned int id = (x >> 24) & 0xff;
  32
  33         if (static_cpu_has(X86_FEATURE_NODEID_MSR)) {
  34                 rdmsrl(MSR_FAM10H_NODE_ID, value);
  35                 id |= (value << 2) & 0xff00;
  36         }
  37
  38         return id;
  39 }
  40
  41 static u32 numachip1_set_apic_id(u32 id)
  42 {
  43         return (id & 0xff) << 24;
  44 }
  45
  46 static u32 numachip2_get_apic_id(u32 x)
  47 {
  48         u64 mcfg;
  49
  50         rdmsrl(MSR_FAM10H_MMIO_CONF_BASE, mcfg);
  51         return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24);
  52 }
  53
  54 static u32 numachip2_set_apic_id(u32 id)
  55 {
  56         return id << 24;
  57 }
  58
  59 static u32 numachip_phys_pkg_id(u32 initial_apic_id, int index_msb)
  60 {
  61         return initial_apic_id >> index_msb;
  62 }
  63
  64 static void numachip1_apic_icr_write(int apicid, unsigned int val)
  65 {
  66         write_lcsr(CSR_G3_EXT_IRQ_GEN, (apicid << 16) | val);
  67 }
  68
  69 static void numachip2_apic_icr_write(int apicid, unsigned int val)
  70 {
  71         numachip2_write32_lcsr(NUMACHIP2_APIC_ICR, (apicid << 12) | val);
  72 }
  73
  74 static int numachip_wakeup_secondary(u32 phys_apicid, unsigned long start_rip)
  75 {
  76         numachip_apic_icr_write(phys_apicid, APIC_DM_INIT);
  77         numachip_apic_icr_write(phys_apicid, APIC_DM_STARTUP |
  78                 (start_rip >> 12));
  79
  80         return 0;
  81 }
  82
  83 static void numachip_send_IPI_one(int cpu, int vector)
  84 {
  85         int local_apicid, apicid = per_cpu(x86_cpu_to_apicid, cpu);
  86         unsigned int dmode;
  87
  88         preempt_disable();
  89         local_apicid = __this_cpu_read(x86_cpu_to_apicid);
  90
  91         /* Send via local APIC where non-local part matches */
  92         if (!((apicid ^ local_apicid) >> NUMACHIP_LAPIC_BITS)) {
  93                 unsigned long flags;
  94
  95                 local_irq_save(flags);
  96                 __default_send_IPI_dest_field(apicid, vector,
  97                         APIC_DEST_PHYSICAL);
  98                 local_irq_restore(flags);
  99                 preempt_enable();
 100                 return;
 101         }
 102         preempt_enable();
 103
 104         dmode = (vector == NMI_VECTOR) ? APIC_DM_NMI : APIC_DM_FIXED;
 105         numachip_apic_icr_write(apicid, dmode | vector);
 106 }
 107
 108 static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
 109 {
 110         unsigned int cpu;
 111
 112         for_each_cpu(cpu, mask)
 113                 numachip_send_IPI_one(cpu, vector);
 114 }
 115
 116 static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
 117                                                 int vector)
 118 {
 119         unsigned int this_cpu = smp_processor_id();
 120         unsigned int cpu;
 121
 122         for_each_cpu(cpu, mask) {
 123                 if (cpu != this_cpu)
 124                         numachip_send_IPI_one(cpu, vector);
 125         }
 126 }
 127
 128 static void numachip_send_IPI_allbutself(int vector)
 129 {
 130         unsigned int this_cpu = smp_processor_id();
 131         unsigned int cpu;
 132
 133         for_each_online_cpu(cpu) {
 134                 if (cpu != this_cpu)
 135                         numachip_send_IPI_one(cpu, vector);
 136         }
 137 }
 138
 139 static void numachip_send_IPI_all(int vector)
 140 {
 141         numachip_send_IPI_mask(cpu_online_mask, vector);
 142 }
 143
 144 static void numachip_send_IPI_self(int vector)
 145 {
 146         apic_write(APIC_SELF_IPI, vector);
 147 }
 148
 149 static int __init numachip1_probe(void)
 150 {
 151         return apic == &apic_numachip1;
 152 }
 153
 154 static int __init numachip2_probe(void)
 155 {
 156         return apic == &apic_numachip2;
 157 }
 158
 159 static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
 160 {
 161         u64 val;
 162         u32 nodes = 1;
 163
 164         c->topo.llc_id = node;
 165
 166         /* Account for nodes per socket in multi-core-module processors */
 167         if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) {
 168                 rdmsrl(MSR_FAM10H_NODE_ID, val);
 169                 nodes = ((val >> 3) & 7) + 1;
 170         }
 171
 172         c->topo.pkg_id = node / nodes;
 173 }
 174
 175 static int __init numachip_system_init(void)
 176 {
 177         /* Map the LCSR area and set up the apic_icr_write function */
 178         switch (numachip_system) {
 179         case 1:
 180                 init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
 181                 numachip_apic_icr_write = numachip1_apic_icr_write;
 182                 break;
 183         case 2:
 184                 init_extra_mapping_uc(NUMACHIP2_LCSR_BASE, NUMACHIP2_LCSR_SIZE);
 185                 numachip_apic_icr_write = numachip2_apic_icr_write;
 186                 break;
 187         default:
 188                 return 0;
 189         }
 190
 191         x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
 192         x86_init.pci.arch_init = pci_numachip_init;
 193
 194         return 0;
 195 }
 196 early_initcall(numachip_system_init);
 197
 198 static int numachip1_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 199 {
 200         if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
 201             (strncmp(oem_table_id, "NCONNECT", 8) != 0))
 202                 return 0;
 203
 204         numachip_system = 1;
 205
 206         return 1;
 207 }
 208
 209 static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 210 {
 211         if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
 212             (strncmp(oem_table_id, "NCONECT2", 8) != 0))
 213                 return 0;
 214
 215         numachip_system = 2;
 216
 217         return 1;
 218 }
 219
 220 static const struct apic apic_numachip1 __refconst = {
 221         .name                           = "NumaConnect system",
 222         .probe                          = numachip1_probe,
 223         .acpi_madt_oem_check            = numachip1_acpi_madt_oem_check,
 224
 225         .dest_mode_logical              = false,
 226
 227         .disable_esr                    = 0,
 228
 229         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 230         .phys_pkg_id                    = numachip_phys_pkg_id,
 231
 232         .max_apic_id                    = UINT_MAX,
 233         .get_apic_id                    = numachip1_get_apic_id,
 234         .set_apic_id                    = numachip1_set_apic_id,
 235
 236         .calc_dest_apicid               = apic_default_calc_apicid,
 237
 238         .send_IPI                       = numachip_send_IPI_one,
 239         .send_IPI_mask                  = numachip_send_IPI_mask,
 240         .send_IPI_mask_allbutself       = numachip_send_IPI_mask_allbutself,
 241         .send_IPI_allbutself            = numachip_send_IPI_allbutself,
 242         .send_IPI_all                   = numachip_send_IPI_all,
 243         .send_IPI_self                  = numachip_send_IPI_self,
 244
 245         .wakeup_secondary_cpu           = numachip_wakeup_secondary,
 246
 247         .read                           = native_apic_mem_read,
 248         .write                          = native_apic_mem_write,
 249         .eoi                            = native_apic_mem_eoi,
 250         .icr_read                       = native_apic_icr_read,
 251         .icr_write                      = native_apic_icr_write,
 252 };
 253
 254 apic_driver(apic_numachip1);
 255
 256 static const struct apic apic_numachip2 __refconst = {
 257         .name                           = "NumaConnect2 system",
 258         .probe                          = numachip2_probe,
 259         .acpi_madt_oem_check            = numachip2_acpi_madt_oem_check,
 260
 261         .dest_mode_logical              = false,
 262
 263         .disable_esr                    = 0,
 264
 265         .cpu_present_to_apicid          = default_cpu_present_to_apicid,
 266         .phys_pkg_id                    = numachip_phys_pkg_id,
 267
 268         .max_apic_id                    = UINT_MAX,
 269         .get_apic_id                    = numachip2_get_apic_id,
 270         .set_apic_id                    = numachip2_set_apic_id,
 271
 272         .calc_dest_apicid               = apic_default_calc_apicid,
 273
 274         .send_IPI                       = numachip_send_IPI_one,
 275         .send_IPI_mask                  = numachip_send_IPI_mask,
 276         .send_IPI_mask_allbutself       = numachip_send_IPI_mask_allbutself,
 277         .send_IPI_allbutself            = numachip_send_IPI_allbutself,
 278         .send_IPI_all                   = numachip_send_IPI_all,
 279         .send_IPI_self                  = numachip_send_IPI_self,
 280
 281         .wakeup_secondary_cpu           = numachip_wakeup_secondary,
 282
 283         .read                           = native_apic_mem_read,
 284         .write                          = native_apic_mem_write,
 285         .eoi                            = native_apic_mem_eoi,
 286         .icr_read                       = native_apic_icr_read,
 287         .icr_write                      = native_apic_icr_write,
 288 };
 289
 290 apic_driver(apic_numachip2);