Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Intel IO-APIC support for multi-Pentium hosts. |
| 3 | * |
Ingo Molnar | 8f47e16 | 2009-01-31 02:03:42 +0100 | [diff] [blame] | 4 | * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Many thanks to Stig Venaas for trying out countless experimental |
| 7 | * patches and reporting/debugging problems patiently! |
| 8 | * |
| 9 | * (c) 1999, Multiple IO-APIC support, developed by |
| 10 | * Ken-ichi Yaku <yaku@css1.kbnes.nec.co.jp> and |
| 11 | * Hidemi Kishimoto <kisimoto@css1.kbnes.nec.co.jp>, |
| 12 | * further tested and cleaned up by Zach Brown <zab@redhat.com> |
| 13 | * and Ingo Molnar <mingo@redhat.com> |
| 14 | * |
| 15 | * Fixes |
| 16 | * Maciej W. Rozycki : Bits for genuine 82489DX APICs; |
| 17 | * thanks to Eric Gilmore |
| 18 | * and Rolf G. Tews |
| 19 | * for testing these extensively |
| 20 | * Paul Diefenbaugh : Added full ACPI support |
| 21 | */ |
| 22 | |
| 23 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/sched.h> |
Yinghai Lu | d4057bd | 2008-08-19 20:50:38 -0700 | [diff] [blame] | 28 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/mc146818rtc.h> |
| 30 | #include <linux/compiler.h> |
| 31 | #include <linux/acpi.h> |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 32 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/sysdev.h> |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 34 | #include <linux/msi.h> |
Eric W. Biederman | 95d7788 | 2006-10-04 02:17:01 -0700 | [diff] [blame] | 35 | #include <linux/htirq.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 36 | #include <linux/freezer.h> |
Eric W. Biederman | f26d6a2 | 2007-05-02 19:27:19 +0200 | [diff] [blame] | 37 | #include <linux/kthread.h> |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 38 | #include <linux/jiffies.h> /* time_after() */ |
Yinghai Lu | d4057bd | 2008-08-19 20:50:38 -0700 | [diff] [blame] | 39 | #ifdef CONFIG_ACPI |
| 40 | #include <acpi/acpi_bus.h> |
| 41 | #endif |
| 42 | #include <linux/bootmem.h> |
| 43 | #include <linux/dmar.h> |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 44 | #include <linux/hpet.h> |
Ashok Raj | 54d5d42 | 2005-09-06 15:16:15 -0700 | [diff] [blame] | 45 | |
Yinghai Lu | d4057bd | 2008-08-19 20:50:38 -0700 | [diff] [blame] | 46 | #include <asm/idle.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <asm/io.h> |
| 48 | #include <asm/smp.h> |
Jaswinder Singh Rajput | 6d652ea | 2009-01-07 21:38:59 +0530 | [diff] [blame] | 49 | #include <asm/cpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <asm/desc.h> |
Yinghai Lu | d4057bd | 2008-08-19 20:50:38 -0700 | [diff] [blame] | 51 | #include <asm/proto.h> |
| 52 | #include <asm/acpi.h> |
| 53 | #include <asm/dma.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include <asm/timer.h> |
Ingo Molnar | 306e440 | 2005-06-30 02:58:55 -0700 | [diff] [blame] | 55 | #include <asm/i8259.h> |
Don Zickus | 3e4ff11 | 2006-06-26 13:57:01 +0200 | [diff] [blame] | 56 | #include <asm/nmi.h> |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 57 | #include <asm/msidef.h> |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 58 | #include <asm/hypertransport.h> |
Yinghai Lu | a4dbc34 | 2008-07-25 02:14:28 -0700 | [diff] [blame] | 59 | #include <asm/setup.h> |
Yinghai Lu | d4057bd | 2008-08-19 20:50:38 -0700 | [diff] [blame] | 60 | #include <asm/irq_remapping.h> |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 61 | #include <asm/hpet.h> |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 62 | #include <asm/uv/uv_hub.h> |
| 63 | #include <asm/uv/uv_irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Ingo Molnar | 7b6aa33 | 2009-02-17 13:58:15 +0100 | [diff] [blame] | 65 | #include <asm/apic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 67 | #define __apicdebuginit(type) static type __init |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | /* |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 70 | * Is the SiS APIC rmw bug present ? |
| 71 | * -1 = don't know, 0 = no, 1 = yes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | */ |
| 73 | int sis_apic_bug = -1; |
| 74 | |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 75 | static DEFINE_SPINLOCK(ioapic_lock); |
| 76 | static DEFINE_SPINLOCK(vector_lock); |
| 77 | |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 78 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | * # of IRQ routing registers |
| 80 | */ |
| 81 | int nr_ioapic_registers[MAX_IO_APICS]; |
| 82 | |
Alexey Starikovskiy | 9f640cc | 2008-04-04 23:41:13 +0400 | [diff] [blame] | 83 | /* I/O APIC entries */ |
Jaswinder Singh Rajput | b5ba7e6 | 2009-01-12 17:46:17 +0530 | [diff] [blame] | 84 | struct mpc_ioapic mp_ioapics[MAX_IO_APICS]; |
Alexey Starikovskiy | 9f640cc | 2008-04-04 23:41:13 +0400 | [diff] [blame] | 85 | int nr_ioapics; |
| 86 | |
Alexey Starikovskiy | 584f734 | 2008-04-04 23:41:32 +0400 | [diff] [blame] | 87 | /* MP IRQ source entries */ |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 88 | struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES]; |
Alexey Starikovskiy | 584f734 | 2008-04-04 23:41:32 +0400 | [diff] [blame] | 89 | |
| 90 | /* # of MP IRQ source entries */ |
| 91 | int mp_irq_entries; |
| 92 | |
Alexey Starikovskiy | 8732fc4 | 2008-05-19 19:47:16 +0400 | [diff] [blame] | 93 | #if defined (CONFIG_MCA) || defined (CONFIG_EISA) |
| 94 | int mp_bus_id_to_type[MAX_MP_BUSSES]; |
| 95 | #endif |
| 96 | |
| 97 | DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES); |
| 98 | |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 99 | int skip_ioapic_setup; |
| 100 | |
Ingo Molnar | 65a4e57 | 2009-01-31 03:36:17 +0100 | [diff] [blame] | 101 | void arch_disable_smp_support(void) |
| 102 | { |
| 103 | #ifdef CONFIG_PCI |
| 104 | noioapicquirk = 1; |
| 105 | noioapicreroute = -1; |
| 106 | #endif |
| 107 | skip_ioapic_setup = 1; |
| 108 | } |
| 109 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 110 | static int __init parse_noapic(char *str) |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 111 | { |
| 112 | /* disable IO-APIC */ |
Ingo Molnar | 65a4e57 | 2009-01-31 03:36:17 +0100 | [diff] [blame] | 113 | arch_disable_smp_support(); |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 114 | return 0; |
| 115 | } |
| 116 | early_param("noapic", parse_noapic); |
Chuck Ebbert | 66759a0 | 2005-09-12 18:49:25 +0200 | [diff] [blame] | 117 | |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 118 | struct irq_pin_list; |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 119 | |
| 120 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | * This is performance-critical, we want to do it O(1) |
| 122 | * |
| 123 | * the indexing order of this array favors 1:1 mappings |
| 124 | * between pins and IRQs. |
| 125 | */ |
| 126 | |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 127 | struct irq_pin_list { |
| 128 | int apic, pin; |
| 129 | struct irq_pin_list *next; |
| 130 | }; |
Yinghai Lu | 301e619 | 2008-08-19 20:50:02 -0700 | [diff] [blame] | 131 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 132 | static struct irq_pin_list *get_one_free_irq_2_pin(int cpu) |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 133 | { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 134 | struct irq_pin_list *pin; |
| 135 | int node; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 136 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 137 | node = cpu_to_node(cpu); |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 138 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 139 | pin = kzalloc_node(sizeof(*pin), GFP_ATOMIC, node); |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 140 | |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 141 | return pin; |
| 142 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 144 | struct irq_cfg { |
| 145 | struct irq_pin_list *irq_2_pin; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 146 | cpumask_var_t domain; |
| 147 | cpumask_var_t old_domain; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 148 | unsigned move_cleanup_count; |
| 149 | u8 vector; |
| 150 | u8 move_in_progress : 1; |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 151 | #ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC |
| 152 | u8 move_desc_pending : 1; |
| 153 | #endif |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 154 | }; |
| 155 | |
| 156 | /* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */ |
| 157 | #ifdef CONFIG_SPARSE_IRQ |
| 158 | static struct irq_cfg irq_cfgx[] = { |
| 159 | #else |
| 160 | static struct irq_cfg irq_cfgx[NR_IRQS] = { |
| 161 | #endif |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 162 | [0] = { .vector = IRQ0_VECTOR, }, |
| 163 | [1] = { .vector = IRQ1_VECTOR, }, |
| 164 | [2] = { .vector = IRQ2_VECTOR, }, |
| 165 | [3] = { .vector = IRQ3_VECTOR, }, |
| 166 | [4] = { .vector = IRQ4_VECTOR, }, |
| 167 | [5] = { .vector = IRQ5_VECTOR, }, |
| 168 | [6] = { .vector = IRQ6_VECTOR, }, |
| 169 | [7] = { .vector = IRQ7_VECTOR, }, |
| 170 | [8] = { .vector = IRQ8_VECTOR, }, |
| 171 | [9] = { .vector = IRQ9_VECTOR, }, |
| 172 | [10] = { .vector = IRQ10_VECTOR, }, |
| 173 | [11] = { .vector = IRQ11_VECTOR, }, |
| 174 | [12] = { .vector = IRQ12_VECTOR, }, |
| 175 | [13] = { .vector = IRQ13_VECTOR, }, |
| 176 | [14] = { .vector = IRQ14_VECTOR, }, |
| 177 | [15] = { .vector = IRQ15_VECTOR, }, |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 178 | }; |
| 179 | |
Yinghai Lu | 13a0c3c | 2008-12-26 02:05:47 -0800 | [diff] [blame] | 180 | int __init arch_early_irq_init(void) |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 181 | { |
| 182 | struct irq_cfg *cfg; |
| 183 | struct irq_desc *desc; |
| 184 | int count; |
| 185 | int i; |
| 186 | |
| 187 | cfg = irq_cfgx; |
| 188 | count = ARRAY_SIZE(irq_cfgx); |
| 189 | |
| 190 | for (i = 0; i < count; i++) { |
| 191 | desc = irq_to_desc(i); |
| 192 | desc->chip_data = &cfg[i]; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 193 | alloc_bootmem_cpumask_var(&cfg[i].domain); |
| 194 | alloc_bootmem_cpumask_var(&cfg[i].old_domain); |
| 195 | if (i < NR_IRQS_LEGACY) |
| 196 | cpumask_setall(cfg[i].domain); |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 197 | } |
Yinghai Lu | 13a0c3c | 2008-12-26 02:05:47 -0800 | [diff] [blame] | 198 | |
| 199 | return 0; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | #ifdef CONFIG_SPARSE_IRQ |
| 203 | static struct irq_cfg *irq_cfg(unsigned int irq) |
| 204 | { |
| 205 | struct irq_cfg *cfg = NULL; |
| 206 | struct irq_desc *desc; |
| 207 | |
| 208 | desc = irq_to_desc(irq); |
| 209 | if (desc) |
| 210 | cfg = desc->chip_data; |
| 211 | |
| 212 | return cfg; |
| 213 | } |
| 214 | |
| 215 | static struct irq_cfg *get_one_free_irq_cfg(int cpu) |
| 216 | { |
| 217 | struct irq_cfg *cfg; |
| 218 | int node; |
| 219 | |
| 220 | node = cpu_to_node(cpu); |
| 221 | |
| 222 | cfg = kzalloc_node(sizeof(*cfg), GFP_ATOMIC, node); |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 223 | if (cfg) { |
Mike Travis | 80855f7 | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 224 | if (!alloc_cpumask_var_node(&cfg->domain, GFP_ATOMIC, node)) { |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 225 | kfree(cfg); |
| 226 | cfg = NULL; |
Mike Travis | 80855f7 | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 227 | } else if (!alloc_cpumask_var_node(&cfg->old_domain, |
| 228 | GFP_ATOMIC, node)) { |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 229 | free_cpumask_var(cfg->domain); |
| 230 | kfree(cfg); |
| 231 | cfg = NULL; |
| 232 | } else { |
| 233 | cpumask_clear(cfg->domain); |
| 234 | cpumask_clear(cfg->old_domain); |
| 235 | } |
| 236 | } |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 237 | |
| 238 | return cfg; |
| 239 | } |
| 240 | |
Yinghai Lu | 13a0c3c | 2008-12-26 02:05:47 -0800 | [diff] [blame] | 241 | int arch_init_chip_data(struct irq_desc *desc, int cpu) |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 242 | { |
| 243 | struct irq_cfg *cfg; |
| 244 | |
| 245 | cfg = desc->chip_data; |
| 246 | if (!cfg) { |
| 247 | desc->chip_data = get_one_free_irq_cfg(cpu); |
| 248 | if (!desc->chip_data) { |
| 249 | printk(KERN_ERR "can not alloc irq_cfg\n"); |
| 250 | BUG_ON(1); |
| 251 | } |
| 252 | } |
Yinghai Lu | 13a0c3c | 2008-12-26 02:05:47 -0800 | [diff] [blame] | 253 | |
| 254 | return 0; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 255 | } |
| 256 | |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 257 | #ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC |
| 258 | |
| 259 | static void |
| 260 | init_copy_irq_2_pin(struct irq_cfg *old_cfg, struct irq_cfg *cfg, int cpu) |
| 261 | { |
| 262 | struct irq_pin_list *old_entry, *head, *tail, *entry; |
| 263 | |
| 264 | cfg->irq_2_pin = NULL; |
| 265 | old_entry = old_cfg->irq_2_pin; |
| 266 | if (!old_entry) |
| 267 | return; |
| 268 | |
| 269 | entry = get_one_free_irq_2_pin(cpu); |
| 270 | if (!entry) |
| 271 | return; |
| 272 | |
| 273 | entry->apic = old_entry->apic; |
| 274 | entry->pin = old_entry->pin; |
| 275 | head = entry; |
| 276 | tail = entry; |
| 277 | old_entry = old_entry->next; |
| 278 | while (old_entry) { |
| 279 | entry = get_one_free_irq_2_pin(cpu); |
| 280 | if (!entry) { |
| 281 | entry = head; |
| 282 | while (entry) { |
| 283 | head = entry->next; |
| 284 | kfree(entry); |
| 285 | entry = head; |
| 286 | } |
| 287 | /* still use the old one */ |
| 288 | return; |
| 289 | } |
| 290 | entry->apic = old_entry->apic; |
| 291 | entry->pin = old_entry->pin; |
| 292 | tail->next = entry; |
| 293 | tail = entry; |
| 294 | old_entry = old_entry->next; |
| 295 | } |
| 296 | |
| 297 | tail->next = NULL; |
| 298 | cfg->irq_2_pin = head; |
| 299 | } |
| 300 | |
| 301 | static void free_irq_2_pin(struct irq_cfg *old_cfg, struct irq_cfg *cfg) |
| 302 | { |
| 303 | struct irq_pin_list *entry, *next; |
| 304 | |
| 305 | if (old_cfg->irq_2_pin == cfg->irq_2_pin) |
| 306 | return; |
| 307 | |
| 308 | entry = old_cfg->irq_2_pin; |
| 309 | |
| 310 | while (entry) { |
| 311 | next = entry->next; |
| 312 | kfree(entry); |
| 313 | entry = next; |
| 314 | } |
| 315 | old_cfg->irq_2_pin = NULL; |
| 316 | } |
| 317 | |
| 318 | void arch_init_copy_chip_data(struct irq_desc *old_desc, |
| 319 | struct irq_desc *desc, int cpu) |
| 320 | { |
| 321 | struct irq_cfg *cfg; |
| 322 | struct irq_cfg *old_cfg; |
| 323 | |
| 324 | cfg = get_one_free_irq_cfg(cpu); |
| 325 | |
| 326 | if (!cfg) |
| 327 | return; |
| 328 | |
| 329 | desc->chip_data = cfg; |
| 330 | |
| 331 | old_cfg = old_desc->chip_data; |
| 332 | |
| 333 | memcpy(cfg, old_cfg, sizeof(struct irq_cfg)); |
| 334 | |
| 335 | init_copy_irq_2_pin(old_cfg, cfg, cpu); |
| 336 | } |
| 337 | |
| 338 | static void free_irq_cfg(struct irq_cfg *old_cfg) |
| 339 | { |
| 340 | kfree(old_cfg); |
| 341 | } |
| 342 | |
| 343 | void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc) |
| 344 | { |
| 345 | struct irq_cfg *old_cfg, *cfg; |
| 346 | |
| 347 | old_cfg = old_desc->chip_data; |
| 348 | cfg = desc->chip_data; |
| 349 | |
| 350 | if (old_cfg == cfg) |
| 351 | return; |
| 352 | |
| 353 | if (old_cfg) { |
| 354 | free_irq_2_pin(old_cfg, cfg); |
| 355 | free_irq_cfg(old_cfg); |
| 356 | old_desc->chip_data = NULL; |
| 357 | } |
| 358 | } |
| 359 | |
Ingo Molnar | d733e00 | 2008-12-17 13:35:51 +0100 | [diff] [blame] | 360 | static void |
| 361 | set_extra_move_desc(struct irq_desc *desc, const struct cpumask *mask) |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 362 | { |
| 363 | struct irq_cfg *cfg = desc->chip_data; |
| 364 | |
| 365 | if (!cfg->move_in_progress) { |
| 366 | /* it means that domain is not changed */ |
Mike Travis | 7f7ace0 | 2009-01-10 21:58:08 -0800 | [diff] [blame] | 367 | if (!cpumask_intersects(desc->affinity, mask)) |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 368 | cfg->move_desc_pending = 1; |
| 369 | } |
| 370 | } |
| 371 | #endif |
| 372 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 373 | #else |
| 374 | static struct irq_cfg *irq_cfg(unsigned int irq) |
| 375 | { |
| 376 | return irq < nr_irqs ? irq_cfgx + irq : NULL; |
| 377 | } |
| 378 | |
| 379 | #endif |
| 380 | |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 381 | #ifndef CONFIG_NUMA_MIGRATE_IRQ_DESC |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 382 | static inline void |
| 383 | set_extra_move_desc(struct irq_desc *desc, const struct cpumask *mask) |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 384 | { |
| 385 | } |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 386 | #endif |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 387 | |
Linus Torvalds | 130fe05 | 2006-11-01 09:11:00 -0800 | [diff] [blame] | 388 | struct io_apic { |
| 389 | unsigned int index; |
| 390 | unsigned int unused[3]; |
| 391 | unsigned int data; |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 392 | unsigned int unused2[11]; |
| 393 | unsigned int eoi; |
Linus Torvalds | 130fe05 | 2006-11-01 09:11:00 -0800 | [diff] [blame] | 394 | }; |
| 395 | |
| 396 | static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx) |
| 397 | { |
| 398 | return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx) |
Jaswinder Singh Rajput | b5ba7e6 | 2009-01-12 17:46:17 +0530 | [diff] [blame] | 399 | + (mp_ioapics[idx].apicaddr & ~PAGE_MASK); |
Linus Torvalds | 130fe05 | 2006-11-01 09:11:00 -0800 | [diff] [blame] | 400 | } |
| 401 | |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 402 | static inline void io_apic_eoi(unsigned int apic, unsigned int vector) |
| 403 | { |
| 404 | struct io_apic __iomem *io_apic = io_apic_base(apic); |
| 405 | writel(vector, &io_apic->eoi); |
| 406 | } |
| 407 | |
Linus Torvalds | 130fe05 | 2006-11-01 09:11:00 -0800 | [diff] [blame] | 408 | static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) |
| 409 | { |
| 410 | struct io_apic __iomem *io_apic = io_apic_base(apic); |
| 411 | writel(reg, &io_apic->index); |
| 412 | return readl(&io_apic->data); |
| 413 | } |
| 414 | |
| 415 | static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) |
| 416 | { |
| 417 | struct io_apic __iomem *io_apic = io_apic_base(apic); |
| 418 | writel(reg, &io_apic->index); |
| 419 | writel(value, &io_apic->data); |
| 420 | } |
| 421 | |
| 422 | /* |
| 423 | * Re-write a value: to be used for read-modify-write |
| 424 | * cycles where the read already set up the index register. |
| 425 | * |
| 426 | * Older SiS APIC requires we rewrite the index register |
| 427 | */ |
| 428 | static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) |
| 429 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 430 | struct io_apic __iomem *io_apic = io_apic_base(apic); |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 431 | |
| 432 | if (sis_apic_bug) |
| 433 | writel(reg, &io_apic->index); |
Linus Torvalds | 130fe05 | 2006-11-01 09:11:00 -0800 | [diff] [blame] | 434 | writel(value, &io_apic->data); |
| 435 | } |
| 436 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 437 | static bool io_apic_level_ack_pending(struct irq_cfg *cfg) |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 438 | { |
| 439 | struct irq_pin_list *entry; |
| 440 | unsigned long flags; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 441 | |
| 442 | spin_lock_irqsave(&ioapic_lock, flags); |
| 443 | entry = cfg->irq_2_pin; |
| 444 | for (;;) { |
| 445 | unsigned int reg; |
| 446 | int pin; |
| 447 | |
| 448 | if (!entry) |
| 449 | break; |
| 450 | pin = entry->pin; |
| 451 | reg = io_apic_read(entry->apic, 0x10 + pin*2); |
| 452 | /* Is the remote IRR bit set? */ |
| 453 | if (reg & IO_APIC_REDIR_REMOTE_IRR) { |
| 454 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 455 | return true; |
| 456 | } |
| 457 | if (!entry->next) |
| 458 | break; |
| 459 | entry = entry->next; |
| 460 | } |
| 461 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 462 | |
| 463 | return false; |
| 464 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 465 | |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 466 | union entry_union { |
| 467 | struct { u32 w1, w2; }; |
| 468 | struct IO_APIC_route_entry entry; |
| 469 | }; |
| 470 | |
| 471 | static struct IO_APIC_route_entry ioapic_read_entry(int apic, int pin) |
| 472 | { |
| 473 | union entry_union eu; |
| 474 | unsigned long flags; |
| 475 | spin_lock_irqsave(&ioapic_lock, flags); |
| 476 | eu.w1 = io_apic_read(apic, 0x10 + 2 * pin); |
| 477 | eu.w2 = io_apic_read(apic, 0x11 + 2 * pin); |
| 478 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 479 | return eu.entry; |
| 480 | } |
| 481 | |
Linus Torvalds | f9dadfa | 2006-11-01 10:05:35 -0800 | [diff] [blame] | 482 | /* |
| 483 | * When we write a new IO APIC routing entry, we need to write the high |
| 484 | * word first! If the mask bit in the low word is clear, we will enable |
| 485 | * the interrupt, and we need to make sure the entry is fully populated |
| 486 | * before that happens. |
| 487 | */ |
Andi Kleen | d15512f | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 488 | static void |
| 489 | __ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) |
| 490 | { |
| 491 | union entry_union eu; |
| 492 | eu.entry = e; |
| 493 | io_apic_write(apic, 0x11 + 2*pin, eu.w2); |
| 494 | io_apic_write(apic, 0x10 + 2*pin, eu.w1); |
| 495 | } |
| 496 | |
Jeremy Fitzhardinge | ca97ab9 | 2009-02-09 12:05:47 -0800 | [diff] [blame] | 497 | void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 498 | { |
| 499 | unsigned long flags; |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 500 | spin_lock_irqsave(&ioapic_lock, flags); |
Andi Kleen | d15512f | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 501 | __ioapic_write_entry(apic, pin, e); |
Linus Torvalds | f9dadfa | 2006-11-01 10:05:35 -0800 | [diff] [blame] | 502 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 503 | } |
| 504 | |
| 505 | /* |
| 506 | * When we mask an IO APIC routing entry, we need to write the low |
| 507 | * word first, in order to set the mask bit before we change the |
| 508 | * high bits! |
| 509 | */ |
| 510 | static void ioapic_mask_entry(int apic, int pin) |
| 511 | { |
| 512 | unsigned long flags; |
| 513 | union entry_union eu = { .entry.mask = 1 }; |
| 514 | |
| 515 | spin_lock_irqsave(&ioapic_lock, flags); |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 516 | io_apic_write(apic, 0x10 + 2*pin, eu.w1); |
| 517 | io_apic_write(apic, 0x11 + 2*pin, eu.w2); |
| 518 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 519 | } |
| 520 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 521 | #ifdef CONFIG_SMP |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 522 | static void send_cleanup_vector(struct irq_cfg *cfg) |
| 523 | { |
| 524 | cpumask_var_t cleanup_mask; |
| 525 | |
| 526 | if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) { |
| 527 | unsigned int i; |
| 528 | cfg->move_cleanup_count = 0; |
| 529 | for_each_cpu_and(i, cfg->old_domain, cpu_online_mask) |
| 530 | cfg->move_cleanup_count++; |
| 531 | for_each_cpu_and(i, cfg->old_domain, cpu_online_mask) |
Ingo Molnar | dac5f41 | 2009-01-28 15:42:24 +0100 | [diff] [blame] | 532 | apic->send_IPI_mask(cpumask_of(i), IRQ_MOVE_CLEANUP_VECTOR); |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 533 | } else { |
| 534 | cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask); |
| 535 | cfg->move_cleanup_count = cpumask_weight(cleanup_mask); |
Ingo Molnar | dac5f41 | 2009-01-28 15:42:24 +0100 | [diff] [blame] | 536 | apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 537 | free_cpumask_var(cleanup_mask); |
| 538 | } |
| 539 | cfg->move_in_progress = 0; |
| 540 | } |
| 541 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 542 | static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 543 | { |
| 544 | int apic, pin; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 545 | struct irq_pin_list *entry; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 546 | u8 vector = cfg->vector; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 547 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 548 | entry = cfg->irq_2_pin; |
| 549 | for (;;) { |
| 550 | unsigned int reg; |
| 551 | |
| 552 | if (!entry) |
| 553 | break; |
| 554 | |
| 555 | apic = entry->apic; |
| 556 | pin = entry->pin; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 557 | /* |
| 558 | * With interrupt-remapping, destination information comes |
| 559 | * from interrupt-remapping table entry. |
| 560 | */ |
| 561 | if (!irq_remapped(irq)) |
| 562 | io_apic_write(apic, 0x11 + pin*2, dest); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 563 | reg = io_apic_read(apic, 0x10 + pin*2); |
| 564 | reg &= ~IO_APIC_REDIR_VECTOR_MASK; |
| 565 | reg |= vector; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 566 | io_apic_modify(apic, 0x10 + pin*2, reg); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 567 | if (!entry->next) |
| 568 | break; |
| 569 | entry = entry->next; |
| 570 | } |
| 571 | } |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 572 | |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 573 | static int |
| 574 | assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask); |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 575 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 576 | /* |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 577 | * Either sets desc->affinity to a valid value, and returns |
| 578 | * ->cpu_mask_to_apicid of that, or returns BAD_APICID and |
| 579 | * leaves desc->affinity untouched. |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 580 | */ |
| 581 | static unsigned int |
| 582 | set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 583 | { |
| 584 | struct irq_cfg *cfg; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 585 | unsigned int irq; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 586 | |
Rusty Russell | 0de2652 | 2008-12-13 21:20:26 +1030 | [diff] [blame] | 587 | if (!cpumask_intersects(mask, cpu_online_mask)) |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 588 | return BAD_APICID; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 589 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 590 | irq = desc->irq; |
| 591 | cfg = desc->chip_data; |
| 592 | if (assign_irq_vector(irq, cfg, mask)) |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 593 | return BAD_APICID; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 594 | |
Mike Travis | 7f7ace0 | 2009-01-10 21:58:08 -0800 | [diff] [blame] | 595 | cpumask_and(desc->affinity, cfg->domain, mask); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 596 | set_extra_move_desc(desc, mask); |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 597 | |
| 598 | return apic->cpu_mask_to_apicid_and(desc->affinity, cpu_online_mask); |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 599 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 600 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 601 | static void |
| 602 | set_ioapic_affinity_irq_desc(struct irq_desc *desc, const struct cpumask *mask) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 603 | { |
| 604 | struct irq_cfg *cfg; |
| 605 | unsigned long flags; |
| 606 | unsigned int dest; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 607 | unsigned int irq; |
| 608 | |
| 609 | irq = desc->irq; |
| 610 | cfg = desc->chip_data; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 611 | |
| 612 | spin_lock_irqsave(&ioapic_lock, flags); |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 613 | dest = set_desc_affinity(desc, mask); |
| 614 | if (dest != BAD_APICID) { |
| 615 | /* Only the high 8 bits are valid. */ |
| 616 | dest = SET_APIC_LOGICAL_ID(dest); |
| 617 | __target_IO_APIC_irq(irq, dest, cfg); |
| 618 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 619 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 620 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 621 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 622 | static void |
| 623 | set_ioapic_affinity_irq(unsigned int irq, const struct cpumask *mask) |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 624 | { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 625 | struct irq_desc *desc; |
| 626 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 627 | desc = irq_to_desc(irq); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 628 | |
| 629 | set_ioapic_affinity_irq_desc(desc, mask); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 630 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 631 | #endif /* CONFIG_SMP */ |
| 632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | /* |
| 634 | * The common case is 1:1 IRQ<->pin mappings. Sometimes there are |
| 635 | * shared ISA-space IRQs, so we have to support them. We are super |
| 636 | * fast in the common case, and fast for shared ISA-space IRQs. |
| 637 | */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 638 | static void add_pin_to_irq_cpu(struct irq_cfg *cfg, int cpu, int apic, int pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | { |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 640 | struct irq_pin_list *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 642 | entry = cfg->irq_2_pin; |
| 643 | if (!entry) { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 644 | entry = get_one_free_irq_2_pin(cpu); |
| 645 | if (!entry) { |
| 646 | printk(KERN_ERR "can not alloc irq_2_pin to add %d - %d\n", |
| 647 | apic, pin); |
| 648 | return; |
| 649 | } |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 650 | cfg->irq_2_pin = entry; |
| 651 | entry->apic = apic; |
| 652 | entry->pin = pin; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 653 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 655 | |
| 656 | while (entry->next) { |
| 657 | /* not again, please */ |
| 658 | if (entry->apic == apic && entry->pin == pin) |
| 659 | return; |
| 660 | |
| 661 | entry = entry->next; |
| 662 | } |
| 663 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 664 | entry->next = get_one_free_irq_2_pin(cpu); |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 665 | entry = entry->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | entry->apic = apic; |
| 667 | entry->pin = pin; |
| 668 | } |
| 669 | |
| 670 | /* |
| 671 | * Reroute an IRQ to a different pin. |
| 672 | */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 673 | static void __init replace_pin_at_irq_cpu(struct irq_cfg *cfg, int cpu, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | int oldapic, int oldpin, |
| 675 | int newapic, int newpin) |
| 676 | { |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 677 | struct irq_pin_list *entry = cfg->irq_2_pin; |
| 678 | int replaced = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 680 | while (entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | if (entry->apic == oldapic && entry->pin == oldpin) { |
| 682 | entry->apic = newapic; |
| 683 | entry->pin = newpin; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 684 | replaced = 1; |
| 685 | /* every one is different, right? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | break; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 687 | } |
| 688 | entry = entry->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | } |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 690 | |
| 691 | /* why? call replace before add? */ |
| 692 | if (!replaced) |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 693 | add_pin_to_irq_cpu(cfg, cpu, newapic, newpin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 696 | static inline void io_apic_modify_irq(struct irq_cfg *cfg, |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 697 | int mask_and, int mask_or, |
| 698 | void (*final)(struct irq_pin_list *entry)) |
| 699 | { |
| 700 | int pin; |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 701 | struct irq_pin_list *entry; |
| 702 | |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 703 | for (entry = cfg->irq_2_pin; entry != NULL; entry = entry->next) { |
| 704 | unsigned int reg; |
| 705 | pin = entry->pin; |
| 706 | reg = io_apic_read(entry->apic, 0x10 + pin * 2); |
| 707 | reg &= mask_and; |
| 708 | reg |= mask_or; |
| 709 | io_apic_modify(entry->apic, 0x10 + pin * 2, reg); |
| 710 | if (final) |
| 711 | final(entry); |
| 712 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 713 | } |
| 714 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 715 | static void __unmask_IO_APIC_irq(struct irq_cfg *cfg) |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 716 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 717 | io_apic_modify_irq(cfg, ~IO_APIC_REDIR_MASKED, 0, NULL); |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 718 | } |
Yinghai Lu | 4e738e2 | 2008-08-19 20:50:47 -0700 | [diff] [blame] | 719 | |
| 720 | #ifdef CONFIG_X86_64 |
Jaswinder Singh Rajput | 7f3e632 | 2008-12-29 20:34:35 +0530 | [diff] [blame] | 721 | static void io_apic_sync(struct irq_pin_list *entry) |
Yinghai Lu | 4e738e2 | 2008-08-19 20:50:47 -0700 | [diff] [blame] | 722 | { |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 723 | /* |
| 724 | * Synchronize the IO-APIC and the CPU by doing |
| 725 | * a dummy read from the IO-APIC |
| 726 | */ |
| 727 | struct io_apic __iomem *io_apic; |
| 728 | io_apic = io_apic_base(entry->apic); |
Yinghai Lu | 4e738e2 | 2008-08-19 20:50:47 -0700 | [diff] [blame] | 729 | readl(&io_apic->data); |
| 730 | } |
| 731 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 732 | static void __mask_IO_APIC_irq(struct irq_cfg *cfg) |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 733 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 734 | io_apic_modify_irq(cfg, ~0, IO_APIC_REDIR_MASKED, &io_apic_sync); |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 735 | } |
| 736 | #else /* CONFIG_X86_32 */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 737 | static void __mask_IO_APIC_irq(struct irq_cfg *cfg) |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 738 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 739 | io_apic_modify_irq(cfg, ~0, IO_APIC_REDIR_MASKED, NULL); |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 740 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 741 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 742 | static void __mask_and_edge_IO_APIC_irq(struct irq_cfg *cfg) |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 743 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 744 | io_apic_modify_irq(cfg, ~IO_APIC_REDIR_LEVEL_TRIGGER, |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 745 | IO_APIC_REDIR_MASKED, NULL); |
| 746 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 747 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 748 | static void __unmask_and_level_IO_APIC_irq(struct irq_cfg *cfg) |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 749 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 750 | io_apic_modify_irq(cfg, ~IO_APIC_REDIR_MASKED, |
Cyrill Gorcunov | 87783be | 2008-09-10 22:19:50 +0400 | [diff] [blame] | 751 | IO_APIC_REDIR_LEVEL_TRIGGER, NULL); |
| 752 | } |
| 753 | #endif /* CONFIG_X86_32 */ |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 754 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 755 | static void mask_IO_APIC_irq_desc(struct irq_desc *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 757 | struct irq_cfg *cfg = desc->chip_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | unsigned long flags; |
| 759 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 760 | BUG_ON(!cfg); |
| 761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | spin_lock_irqsave(&ioapic_lock, flags); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 763 | __mask_IO_APIC_irq(cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 765 | } |
| 766 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 767 | static void unmask_IO_APIC_irq_desc(struct irq_desc *desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 769 | struct irq_cfg *cfg = desc->chip_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | unsigned long flags; |
| 771 | |
| 772 | spin_lock_irqsave(&ioapic_lock, flags); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 773 | __unmask_IO_APIC_irq(cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 775 | } |
| 776 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 777 | static void mask_IO_APIC_irq(unsigned int irq) |
| 778 | { |
| 779 | struct irq_desc *desc = irq_to_desc(irq); |
| 780 | |
| 781 | mask_IO_APIC_irq_desc(desc); |
| 782 | } |
| 783 | static void unmask_IO_APIC_irq(unsigned int irq) |
| 784 | { |
| 785 | struct irq_desc *desc = irq_to_desc(irq); |
| 786 | |
| 787 | unmask_IO_APIC_irq_desc(desc); |
| 788 | } |
| 789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin) |
| 791 | { |
| 792 | struct IO_APIC_route_entry entry; |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 793 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | /* Check delivery_mode to be sure we're not clearing an SMI pin */ |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 795 | entry = ioapic_read_entry(apic, pin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | if (entry.delivery_mode == dest_SMI) |
| 797 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | /* |
| 799 | * Disable it in the IO-APIC irq-routing table: |
| 800 | */ |
Linus Torvalds | f9dadfa | 2006-11-01 10:05:35 -0800 | [diff] [blame] | 801 | ioapic_mask_entry(apic, pin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 804 | static void clear_IO_APIC (void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | { |
| 806 | int apic, pin; |
| 807 | |
| 808 | for (apic = 0; apic < nr_ioapics; apic++) |
| 809 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) |
| 810 | clear_IO_APIC_pin(apic, pin); |
| 811 | } |
| 812 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 813 | #ifdef CONFIG_X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | /* |
| 815 | * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to |
| 816 | * specific CPU-side IRQs. |
| 817 | */ |
| 818 | |
| 819 | #define MAX_PIRQS 8 |
Yinghai Lu | 3bd25d0 | 2009-02-15 02:54:03 -0800 | [diff] [blame] | 820 | static int pirq_entries[MAX_PIRQS] = { |
| 821 | [0 ... MAX_PIRQS - 1] = -1 |
| 822 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | static int __init ioapic_pirq_setup(char *str) |
| 825 | { |
| 826 | int i, max; |
| 827 | int ints[MAX_PIRQS+1]; |
| 828 | |
| 829 | get_options(str, ARRAY_SIZE(ints), ints); |
| 830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | apic_printk(APIC_VERBOSE, KERN_INFO |
| 832 | "PIRQ redirection, working around broken MP-BIOS.\n"); |
| 833 | max = MAX_PIRQS; |
| 834 | if (ints[0] < MAX_PIRQS) |
| 835 | max = ints[0]; |
| 836 | |
| 837 | for (i = 0; i < max; i++) { |
| 838 | apic_printk(APIC_VERBOSE, KERN_DEBUG |
| 839 | "... PIRQ%d -> IRQ %d\n", i, ints[i+1]); |
| 840 | /* |
| 841 | * PIRQs are mapped upside down, usually. |
| 842 | */ |
| 843 | pirq_entries[MAX_PIRQS-i-1] = ints[i+1]; |
| 844 | } |
| 845 | return 1; |
| 846 | } |
| 847 | |
| 848 | __setup("pirq=", ioapic_pirq_setup); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 849 | #endif /* CONFIG_X86_32 */ |
| 850 | |
| 851 | #ifdef CONFIG_INTR_REMAP |
| 852 | /* I/O APIC RTE contents at the OS boot up */ |
| 853 | static struct IO_APIC_route_entry *early_ioapic_entries[MAX_IO_APICS]; |
| 854 | |
| 855 | /* |
| 856 | * Saves and masks all the unmasked IO-APIC RTE's |
| 857 | */ |
| 858 | int save_mask_IO_APIC_setup(void) |
| 859 | { |
| 860 | union IO_APIC_reg_01 reg_01; |
| 861 | unsigned long flags; |
| 862 | int apic, pin; |
| 863 | |
| 864 | /* |
| 865 | * The number of IO-APIC IRQ registers (== #pins): |
| 866 | */ |
| 867 | for (apic = 0; apic < nr_ioapics; apic++) { |
| 868 | spin_lock_irqsave(&ioapic_lock, flags); |
| 869 | reg_01.raw = io_apic_read(apic, 1); |
| 870 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 871 | nr_ioapic_registers[apic] = reg_01.bits.entries+1; |
| 872 | } |
| 873 | |
| 874 | for (apic = 0; apic < nr_ioapics; apic++) { |
| 875 | early_ioapic_entries[apic] = |
| 876 | kzalloc(sizeof(struct IO_APIC_route_entry) * |
| 877 | nr_ioapic_registers[apic], GFP_KERNEL); |
| 878 | if (!early_ioapic_entries[apic]) |
Cyrill Gorcunov | 5ffa4eb | 2008-09-18 23:37:57 +0400 | [diff] [blame] | 879 | goto nomem; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 880 | } |
| 881 | |
| 882 | for (apic = 0; apic < nr_ioapics; apic++) |
| 883 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { |
| 884 | struct IO_APIC_route_entry entry; |
| 885 | |
| 886 | entry = early_ioapic_entries[apic][pin] = |
| 887 | ioapic_read_entry(apic, pin); |
| 888 | if (!entry.mask) { |
| 889 | entry.mask = 1; |
| 890 | ioapic_write_entry(apic, pin, entry); |
| 891 | } |
| 892 | } |
Cyrill Gorcunov | 5ffa4eb | 2008-09-18 23:37:57 +0400 | [diff] [blame] | 893 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 894 | return 0; |
Cyrill Gorcunov | 5ffa4eb | 2008-09-18 23:37:57 +0400 | [diff] [blame] | 895 | |
| 896 | nomem: |
Cyrill Gorcunov | c1370b4 | 2008-09-23 23:00:02 +0400 | [diff] [blame] | 897 | while (apic >= 0) |
| 898 | kfree(early_ioapic_entries[apic--]); |
Cyrill Gorcunov | 5ffa4eb | 2008-09-18 23:37:57 +0400 | [diff] [blame] | 899 | memset(early_ioapic_entries, 0, |
| 900 | ARRAY_SIZE(early_ioapic_entries)); |
| 901 | |
| 902 | return -ENOMEM; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | void restore_IO_APIC_setup(void) |
| 906 | { |
| 907 | int apic, pin; |
| 908 | |
Cyrill Gorcunov | 5ffa4eb | 2008-09-18 23:37:57 +0400 | [diff] [blame] | 909 | for (apic = 0; apic < nr_ioapics; apic++) { |
| 910 | if (!early_ioapic_entries[apic]) |
| 911 | break; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 912 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) |
| 913 | ioapic_write_entry(apic, pin, |
| 914 | early_ioapic_entries[apic][pin]); |
Cyrill Gorcunov | 5ffa4eb | 2008-09-18 23:37:57 +0400 | [diff] [blame] | 915 | kfree(early_ioapic_entries[apic]); |
| 916 | early_ioapic_entries[apic] = NULL; |
| 917 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 918 | } |
| 919 | |
| 920 | void reinit_intr_remapped_IO_APIC(int intr_remapping) |
| 921 | { |
| 922 | /* |
| 923 | * for now plain restore of previous settings. |
| 924 | * TBD: In the case of OS enabling interrupt-remapping, |
| 925 | * IO-APIC RTE's need to be setup to point to interrupt-remapping |
| 926 | * table entries. for now, do a plain restore, and wait for |
| 927 | * the setup_IO_APIC_irqs() to do proper initialization. |
| 928 | */ |
| 929 | restore_IO_APIC_setup(); |
| 930 | } |
| 931 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
| 933 | /* |
| 934 | * Find the IRQ entry number of a certain pin. |
| 935 | */ |
| 936 | static int find_irq_entry(int apic, int pin, int type) |
| 937 | { |
| 938 | int i; |
| 939 | |
| 940 | for (i = 0; i < mp_irq_entries; i++) |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 941 | if (mp_irqs[i].irqtype == type && |
| 942 | (mp_irqs[i].dstapic == mp_ioapics[apic].apicid || |
| 943 | mp_irqs[i].dstapic == MP_APIC_ALL) && |
| 944 | mp_irqs[i].dstirq == pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | return i; |
| 946 | |
| 947 | return -1; |
| 948 | } |
| 949 | |
| 950 | /* |
| 951 | * Find the pin to which IRQ[irq] (ISA) is connected |
| 952 | */ |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 953 | static int __init find_isa_irq_pin(int irq, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | { |
| 955 | int i; |
| 956 | |
| 957 | for (i = 0; i < mp_irq_entries; i++) { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 958 | int lbus = mp_irqs[i].srcbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
Alexey Starikovskiy | d27e2b8 | 2008-03-20 14:54:18 +0300 | [diff] [blame] | 960 | if (test_bit(lbus, mp_bus_not_pci) && |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 961 | (mp_irqs[i].irqtype == type) && |
| 962 | (mp_irqs[i].srcbusirq == irq)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 964 | return mp_irqs[i].dstirq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | } |
| 966 | return -1; |
| 967 | } |
| 968 | |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 969 | static int __init find_isa_irq_apic(int irq, int type) |
| 970 | { |
| 971 | int i; |
| 972 | |
| 973 | for (i = 0; i < mp_irq_entries; i++) { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 974 | int lbus = mp_irqs[i].srcbus; |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 975 | |
Alexey Starikovskiy | 73b2961 | 2008-03-20 14:54:24 +0300 | [diff] [blame] | 976 | if (test_bit(lbus, mp_bus_not_pci) && |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 977 | (mp_irqs[i].irqtype == type) && |
| 978 | (mp_irqs[i].srcbusirq == irq)) |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 979 | break; |
| 980 | } |
| 981 | if (i < mp_irq_entries) { |
| 982 | int apic; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 983 | for(apic = 0; apic < nr_ioapics; apic++) { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 984 | if (mp_ioapics[apic].apicid == mp_irqs[i].dstapic) |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 985 | return apic; |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | return -1; |
| 990 | } |
| 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | /* |
| 993 | * Find a specific PCI IRQ entry. |
| 994 | * Not an __init, possibly needed by modules |
| 995 | */ |
| 996 | static int pin_2_irq(int idx, int apic, int pin); |
| 997 | |
| 998 | int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin) |
| 999 | { |
| 1000 | int apic, i, best_guess = -1; |
| 1001 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1002 | apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n", |
| 1003 | bus, slot, pin); |
Alexey Starikovskiy | ce6444d | 2008-05-19 19:47:09 +0400 | [diff] [blame] | 1004 | if (test_bit(bus, mp_bus_not_pci)) { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1005 | apic_printk(APIC_VERBOSE, "PCI BIOS passed nonexistent PCI bus %d!\n", bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | return -1; |
| 1007 | } |
| 1008 | for (i = 0; i < mp_irq_entries; i++) { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1009 | int lbus = mp_irqs[i].srcbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
| 1011 | for (apic = 0; apic < nr_ioapics; apic++) |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1012 | if (mp_ioapics[apic].apicid == mp_irqs[i].dstapic || |
| 1013 | mp_irqs[i].dstapic == MP_APIC_ALL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | break; |
| 1015 | |
Alexey Starikovskiy | 47cab82 | 2008-03-20 14:54:30 +0300 | [diff] [blame] | 1016 | if (!test_bit(lbus, mp_bus_not_pci) && |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1017 | !mp_irqs[i].irqtype && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | (bus == lbus) && |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1019 | (slot == ((mp_irqs[i].srcbusirq >> 2) & 0x1f))) { |
| 1020 | int irq = pin_2_irq(i, apic, mp_irqs[i].dstirq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | |
| 1022 | if (!(apic || IO_APIC_IRQ(irq))) |
| 1023 | continue; |
| 1024 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1025 | if (pin == (mp_irqs[i].srcbusirq & 3)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | return irq; |
| 1027 | /* |
| 1028 | * Use the first all-but-pin matching entry as a |
| 1029 | * best-guess fuzzy result for broken mptables. |
| 1030 | */ |
| 1031 | if (best_guess < 0) |
| 1032 | best_guess = irq; |
| 1033 | } |
| 1034 | } |
| 1035 | return best_guess; |
| 1036 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1037 | |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 1038 | EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Alexey Starikovskiy | c0a282c | 2008-03-20 14:55:02 +0300 | [diff] [blame] | 1040 | #if defined(CONFIG_EISA) || defined(CONFIG_MCA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | /* |
| 1042 | * EISA Edge/Level control register, ELCR |
| 1043 | */ |
| 1044 | static int EISA_ELCR(unsigned int irq) |
| 1045 | { |
Yinghai Lu | 99d093d | 2008-12-05 18:58:32 -0800 | [diff] [blame] | 1046 | if (irq < NR_IRQS_LEGACY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | unsigned int port = 0x4d0 + (irq >> 3); |
| 1048 | return (inb(port) >> (irq & 7)) & 1; |
| 1049 | } |
| 1050 | apic_printk(APIC_VERBOSE, KERN_INFO |
| 1051 | "Broken MPtable reports ISA irq %d\n", irq); |
| 1052 | return 0; |
| 1053 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1054 | |
Alexey Starikovskiy | c0a282c | 2008-03-20 14:55:02 +0300 | [diff] [blame] | 1055 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
Alexey Starikovskiy | 6728801 | 2008-03-20 14:54:36 +0300 | [diff] [blame] | 1057 | /* ISA interrupts are always polarity zero edge triggered, |
| 1058 | * when listed as conforming in the MP table. */ |
| 1059 | |
| 1060 | #define default_ISA_trigger(idx) (0) |
| 1061 | #define default_ISA_polarity(idx) (0) |
| 1062 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | /* EISA interrupts are always polarity zero and can be edge or level |
| 1064 | * trigger depending on the ELCR value. If an interrupt is listed as |
| 1065 | * EISA conforming in the MP table, that means its trigger type must |
| 1066 | * be read in from the ELCR */ |
| 1067 | |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1068 | #define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].srcbusirq)) |
Alexey Starikovskiy | 6728801 | 2008-03-20 14:54:36 +0300 | [diff] [blame] | 1069 | #define default_EISA_polarity(idx) default_ISA_polarity(idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
| 1071 | /* PCI interrupts are always polarity one level triggered, |
| 1072 | * when listed as conforming in the MP table. */ |
| 1073 | |
| 1074 | #define default_PCI_trigger(idx) (1) |
| 1075 | #define default_PCI_polarity(idx) (1) |
| 1076 | |
| 1077 | /* MCA interrupts are always polarity zero level triggered, |
| 1078 | * when listed as conforming in the MP table. */ |
| 1079 | |
| 1080 | #define default_MCA_trigger(idx) (1) |
Alexey Starikovskiy | 6728801 | 2008-03-20 14:54:36 +0300 | [diff] [blame] | 1081 | #define default_MCA_polarity(idx) default_ISA_polarity(idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
Shaohua Li | 61fd47e | 2007-11-17 01:05:28 -0500 | [diff] [blame] | 1083 | static int MPBIOS_polarity(int idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1085 | int bus = mp_irqs[idx].srcbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | int polarity; |
| 1087 | |
| 1088 | /* |
| 1089 | * Determine IRQ line polarity (high active or low active): |
| 1090 | */ |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1091 | switch (mp_irqs[idx].irqflag & 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1093 | case 0: /* conforms, ie. bus-type dependent polarity */ |
| 1094 | if (test_bit(bus, mp_bus_not_pci)) |
| 1095 | polarity = default_ISA_polarity(idx); |
| 1096 | else |
| 1097 | polarity = default_PCI_polarity(idx); |
| 1098 | break; |
| 1099 | case 1: /* high active */ |
| 1100 | { |
| 1101 | polarity = 0; |
| 1102 | break; |
| 1103 | } |
| 1104 | case 2: /* reserved */ |
| 1105 | { |
| 1106 | printk(KERN_WARNING "broken BIOS!!\n"); |
| 1107 | polarity = 1; |
| 1108 | break; |
| 1109 | } |
| 1110 | case 3: /* low active */ |
| 1111 | { |
| 1112 | polarity = 1; |
| 1113 | break; |
| 1114 | } |
| 1115 | default: /* invalid */ |
| 1116 | { |
| 1117 | printk(KERN_WARNING "broken BIOS!!\n"); |
| 1118 | polarity = 1; |
| 1119 | break; |
| 1120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | } |
| 1122 | return polarity; |
| 1123 | } |
| 1124 | |
| 1125 | static int MPBIOS_trigger(int idx) |
| 1126 | { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1127 | int bus = mp_irqs[idx].srcbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | int trigger; |
| 1129 | |
| 1130 | /* |
| 1131 | * Determine IRQ trigger mode (edge or level sensitive): |
| 1132 | */ |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1133 | switch ((mp_irqs[idx].irqflag>>2) & 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1135 | case 0: /* conforms, ie. bus-type dependent */ |
| 1136 | if (test_bit(bus, mp_bus_not_pci)) |
| 1137 | trigger = default_ISA_trigger(idx); |
| 1138 | else |
| 1139 | trigger = default_PCI_trigger(idx); |
Alexey Starikovskiy | c0a282c | 2008-03-20 14:55:02 +0300 | [diff] [blame] | 1140 | #if defined(CONFIG_EISA) || defined(CONFIG_MCA) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1141 | switch (mp_bus_id_to_type[bus]) { |
| 1142 | case MP_BUS_ISA: /* ISA pin */ |
| 1143 | { |
| 1144 | /* set before the switch */ |
| 1145 | break; |
| 1146 | } |
| 1147 | case MP_BUS_EISA: /* EISA pin */ |
| 1148 | { |
| 1149 | trigger = default_EISA_trigger(idx); |
| 1150 | break; |
| 1151 | } |
| 1152 | case MP_BUS_PCI: /* PCI pin */ |
| 1153 | { |
| 1154 | /* set before the switch */ |
| 1155 | break; |
| 1156 | } |
| 1157 | case MP_BUS_MCA: /* MCA pin */ |
| 1158 | { |
| 1159 | trigger = default_MCA_trigger(idx); |
| 1160 | break; |
| 1161 | } |
| 1162 | default: |
| 1163 | { |
| 1164 | printk(KERN_WARNING "broken BIOS!!\n"); |
| 1165 | trigger = 1; |
| 1166 | break; |
| 1167 | } |
| 1168 | } |
| 1169 | #endif |
| 1170 | break; |
| 1171 | case 1: /* edge */ |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 1172 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1173 | trigger = 0; |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 1174 | break; |
| 1175 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1176 | case 2: /* reserved */ |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 1177 | { |
| 1178 | printk(KERN_WARNING "broken BIOS!!\n"); |
| 1179 | trigger = 1; |
| 1180 | break; |
| 1181 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1182 | case 3: /* level */ |
| 1183 | { |
| 1184 | trigger = 1; |
| 1185 | break; |
| 1186 | } |
| 1187 | default: /* invalid */ |
| 1188 | { |
| 1189 | printk(KERN_WARNING "broken BIOS!!\n"); |
| 1190 | trigger = 0; |
| 1191 | break; |
| 1192 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | } |
| 1194 | return trigger; |
| 1195 | } |
| 1196 | |
| 1197 | static inline int irq_polarity(int idx) |
| 1198 | { |
| 1199 | return MPBIOS_polarity(idx); |
| 1200 | } |
| 1201 | |
| 1202 | static inline int irq_trigger(int idx) |
| 1203 | { |
| 1204 | return MPBIOS_trigger(idx); |
| 1205 | } |
| 1206 | |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 1207 | int (*ioapic_renumber_irq)(int ioapic, int irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | static int pin_2_irq(int idx, int apic, int pin) |
| 1209 | { |
| 1210 | int irq, i; |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1211 | int bus = mp_irqs[idx].srcbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
| 1213 | /* |
| 1214 | * Debugging check, we are in big trouble if this message pops up! |
| 1215 | */ |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1216 | if (mp_irqs[idx].dstirq != pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n"); |
| 1218 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1219 | if (test_bit(bus, mp_bus_not_pci)) { |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 1220 | irq = mp_irqs[idx].srcbusirq; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1221 | } else { |
Alexey Starikovskiy | 643befe | 2008-03-20 14:54:49 +0300 | [diff] [blame] | 1222 | /* |
| 1223 | * PCI IRQs are mapped in order |
| 1224 | */ |
| 1225 | i = irq = 0; |
| 1226 | while (i < apic) |
| 1227 | irq += nr_ioapic_registers[i++]; |
| 1228 | irq += pin; |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 1229 | /* |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1230 | * For MPS mode, so far only needed by ES7000 platform |
| 1231 | */ |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 1232 | if (ioapic_renumber_irq) |
| 1233 | irq = ioapic_renumber_irq(apic, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | } |
| 1235 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1236 | #ifdef CONFIG_X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | /* |
| 1238 | * PCI IRQ command line redirection. Yes, limits are hardcoded. |
| 1239 | */ |
| 1240 | if ((pin >= 16) && (pin <= 23)) { |
| 1241 | if (pirq_entries[pin-16] != -1) { |
| 1242 | if (!pirq_entries[pin-16]) { |
| 1243 | apic_printk(APIC_VERBOSE, KERN_DEBUG |
| 1244 | "disabling PIRQ%d\n", pin-16); |
| 1245 | } else { |
| 1246 | irq = pirq_entries[pin-16]; |
| 1247 | apic_printk(APIC_VERBOSE, KERN_DEBUG |
| 1248 | "using PIRQ%d -> IRQ %d\n", |
| 1249 | pin-16, irq); |
| 1250 | } |
| 1251 | } |
| 1252 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1253 | #endif |
| 1254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | return irq; |
| 1256 | } |
| 1257 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1258 | void lock_vector_lock(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1260 | /* Used to the online set of cpus does not change |
| 1261 | * during assign_irq_vector. |
| 1262 | */ |
| 1263 | spin_lock(&vector_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1266 | void unlock_vector_lock(void) |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 1267 | { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1268 | spin_unlock(&vector_lock); |
| 1269 | } |
| 1270 | |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 1271 | static int |
| 1272 | __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1273 | { |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1274 | /* |
| 1275 | * NOTE! The local APIC isn't very good at handling |
| 1276 | * multiple interrupts at the same interrupt level. |
| 1277 | * As the interrupt level is determined by taking the |
| 1278 | * vector number and shifting that right by 4, we |
| 1279 | * want to spread these out a bit so that they don't |
| 1280 | * all fall in the same interrupt level. |
| 1281 | * |
| 1282 | * Also, we've got to be careful not to trash gate |
| 1283 | * 0x80, because int 0x80 is hm, kind of importantish. ;) |
| 1284 | */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1285 | static int current_vector = FIRST_DEVICE_VECTOR, current_offset = 0; |
| 1286 | unsigned int old_vector; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1287 | int cpu, err; |
| 1288 | cpumask_var_t tmp_mask; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1289 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1290 | if ((cfg->move_in_progress) || cfg->move_cleanup_count) |
| 1291 | return -EBUSY; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1292 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1293 | if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC)) |
| 1294 | return -ENOMEM; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1295 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1296 | old_vector = cfg->vector; |
| 1297 | if (old_vector) { |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1298 | cpumask_and(tmp_mask, mask, cpu_online_mask); |
| 1299 | cpumask_and(tmp_mask, cfg->domain, tmp_mask); |
| 1300 | if (!cpumask_empty(tmp_mask)) { |
| 1301 | free_cpumask_var(tmp_mask); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1302 | return 0; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1303 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1304 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1305 | |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 1306 | /* Only try and allocate irqs on cpus that are present */ |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1307 | err = -ENOSPC; |
| 1308 | for_each_cpu_and(cpu, mask, cpu_online_mask) { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1309 | int new_cpu; |
| 1310 | int vector, offset; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1311 | |
Ingo Molnar | e2d40b1 | 2009-01-28 06:50:47 +0100 | [diff] [blame] | 1312 | apic->vector_allocation_domain(cpu, tmp_mask); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1313 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1314 | vector = current_vector; |
| 1315 | offset = current_offset; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1316 | next: |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1317 | vector += 8; |
| 1318 | if (vector >= first_system_vector) { |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 1319 | /* If out of vectors on large boxen, must share them. */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1320 | offset = (offset + 1) % 8; |
| 1321 | vector = FIRST_DEVICE_VECTOR + offset; |
Yinghai Lu | 7a959cf | 2008-08-19 20:50:32 -0700 | [diff] [blame] | 1322 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1323 | if (unlikely(current_vector == vector)) |
| 1324 | continue; |
Yinghai Lu | b77b881 | 2008-12-19 15:23:44 -0800 | [diff] [blame] | 1325 | |
| 1326 | if (test_bit(vector, used_vectors)) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1327 | goto next; |
Yinghai Lu | b77b881 | 2008-12-19 15:23:44 -0800 | [diff] [blame] | 1328 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1329 | for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1330 | if (per_cpu(vector_irq, new_cpu)[vector] != -1) |
| 1331 | goto next; |
| 1332 | /* Found one! */ |
| 1333 | current_vector = vector; |
| 1334 | current_offset = offset; |
| 1335 | if (old_vector) { |
| 1336 | cfg->move_in_progress = 1; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1337 | cpumask_copy(cfg->old_domain, cfg->domain); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1338 | } |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1339 | for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1340 | per_cpu(vector_irq, new_cpu)[vector] = irq; |
| 1341 | cfg->vector = vector; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1342 | cpumask_copy(cfg->domain, tmp_mask); |
| 1343 | err = 0; |
| 1344 | break; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1345 | } |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1346 | free_cpumask_var(tmp_mask); |
| 1347 | return err; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1348 | } |
| 1349 | |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 1350 | static int |
| 1351 | assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1352 | { |
| 1353 | int err; |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 1354 | unsigned long flags; |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 1355 | |
| 1356 | spin_lock_irqsave(&vector_lock, flags); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1357 | err = __assign_irq_vector(irq, cfg, mask); |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 1358 | spin_unlock_irqrestore(&vector_lock, flags); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1359 | return err; |
| 1360 | } |
| 1361 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1362 | static void __clear_irq_vector(int irq, struct irq_cfg *cfg) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1363 | { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1364 | int cpu, vector; |
| 1365 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1366 | BUG_ON(!cfg->vector); |
| 1367 | |
| 1368 | vector = cfg->vector; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1369 | for_each_cpu_and(cpu, cfg->domain, cpu_online_mask) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1370 | per_cpu(vector_irq, cpu)[vector] = -1; |
| 1371 | |
| 1372 | cfg->vector = 0; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1373 | cpumask_clear(cfg->domain); |
Matthew Wilcox | 0ca4b6b | 2008-11-20 14:09:33 -0700 | [diff] [blame] | 1374 | |
| 1375 | if (likely(!cfg->move_in_progress)) |
| 1376 | return; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1377 | for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) { |
Matthew Wilcox | 0ca4b6b | 2008-11-20 14:09:33 -0700 | [diff] [blame] | 1378 | for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; |
| 1379 | vector++) { |
| 1380 | if (per_cpu(vector_irq, cpu)[vector] != irq) |
| 1381 | continue; |
| 1382 | per_cpu(vector_irq, cpu)[vector] = -1; |
| 1383 | break; |
| 1384 | } |
| 1385 | } |
| 1386 | cfg->move_in_progress = 0; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1387 | } |
| 1388 | |
| 1389 | void __setup_vector_irq(int cpu) |
| 1390 | { |
| 1391 | /* Initialize vector_irq on a new cpu */ |
| 1392 | /* This function must be called with vector_lock held */ |
| 1393 | int irq, vector; |
| 1394 | struct irq_cfg *cfg; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1395 | struct irq_desc *desc; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1396 | |
| 1397 | /* Mark the inuse vectors */ |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1398 | for_each_irq_desc(irq, desc) { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1399 | cfg = desc->chip_data; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1400 | if (!cpumask_test_cpu(cpu, cfg->domain)) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1401 | continue; |
| 1402 | vector = cfg->vector; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1403 | per_cpu(vector_irq, cpu)[vector] = irq; |
| 1404 | } |
| 1405 | /* Mark the free vectors */ |
| 1406 | for (vector = 0; vector < NR_VECTORS; ++vector) { |
| 1407 | irq = per_cpu(vector_irq, cpu)[vector]; |
| 1408 | if (irq < 0) |
| 1409 | continue; |
| 1410 | |
| 1411 | cfg = irq_cfg(irq); |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1412 | if (!cpumask_test_cpu(cpu, cfg->domain)) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1413 | per_cpu(vector_irq, cpu)[vector] = -1; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1414 | } |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 1415 | } |
Glauber Costa | 3fde690 | 2008-05-28 20:34:19 -0700 | [diff] [blame] | 1416 | |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 1417 | static struct irq_chip ioapic_chip; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1418 | static struct irq_chip ir_ioapic_chip; |
Suresh Siddha | 29b61be | 2009-03-16 17:05:02 -0700 | [diff] [blame^] | 1419 | static struct irq_chip msi_ir_chip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1421 | #define IOAPIC_AUTO -1 |
| 1422 | #define IOAPIC_EDGE 0 |
| 1423 | #define IOAPIC_LEVEL 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1425 | #ifdef CONFIG_X86_32 |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 1426 | static inline int IO_APIC_irq_trigger(int irq) |
| 1427 | { |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 1428 | int apic, idx, pin; |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 1429 | |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 1430 | for (apic = 0; apic < nr_ioapics; apic++) { |
| 1431 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { |
| 1432 | idx = find_irq_entry(apic, pin, mp_INT); |
| 1433 | if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin))) |
| 1434 | return irq_trigger(idx); |
| 1435 | } |
| 1436 | } |
| 1437 | /* |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1438 | * nonexistent IRQs are edge default |
| 1439 | */ |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 1440 | return 0; |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 1441 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1442 | #else |
| 1443 | static inline int IO_APIC_irq_trigger(int irq) |
| 1444 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1445 | return 1; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1446 | } |
| 1447 | #endif |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 1448 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1449 | static void ioapic_register_intr(int irq, struct irq_desc *desc, unsigned long trigger) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | { |
Yinghai Lu | 199751d | 2008-08-19 20:50:27 -0700 | [diff] [blame] | 1451 | |
Jan Beulich | 6ebcc00 | 2006-06-26 13:56:46 +0200 | [diff] [blame] | 1452 | if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1453 | trigger == IOAPIC_LEVEL) |
Yinghai Lu | 08678b0 | 2008-08-19 20:50:05 -0700 | [diff] [blame] | 1454 | desc->status |= IRQ_LEVEL; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1455 | else |
| 1456 | desc->status &= ~IRQ_LEVEL; |
| 1457 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1458 | if (irq_remapped(irq)) { |
| 1459 | desc->status |= IRQ_MOVE_PCNTXT; |
| 1460 | if (trigger) |
| 1461 | set_irq_chip_and_handler_name(irq, &ir_ioapic_chip, |
| 1462 | handle_fasteoi_irq, |
| 1463 | "fasteoi"); |
| 1464 | else |
| 1465 | set_irq_chip_and_handler_name(irq, &ir_ioapic_chip, |
| 1466 | handle_edge_irq, "edge"); |
| 1467 | return; |
| 1468 | } |
Suresh Siddha | 29b61be | 2009-03-16 17:05:02 -0700 | [diff] [blame^] | 1469 | |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1470 | if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || |
| 1471 | trigger == IOAPIC_LEVEL) |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 1472 | set_irq_chip_and_handler_name(irq, &ioapic_chip, |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1473 | handle_fasteoi_irq, |
| 1474 | "fasteoi"); |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 1475 | else |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 1476 | set_irq_chip_and_handler_name(irq, &ioapic_chip, |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1477 | handle_edge_irq, "edge"); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1478 | } |
| 1479 | |
Jeremy Fitzhardinge | ca97ab9 | 2009-02-09 12:05:47 -0800 | [diff] [blame] | 1480 | int setup_ioapic_entry(int apic_id, int irq, |
| 1481 | struct IO_APIC_route_entry *entry, |
| 1482 | unsigned int destination, int trigger, |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 1483 | int polarity, int vector, int pin) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1484 | { |
| 1485 | /* |
| 1486 | * add it to the IO-APIC irq-routing table: |
| 1487 | */ |
| 1488 | memset(entry,0,sizeof(*entry)); |
| 1489 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1490 | if (intr_remapping_enabled) { |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1491 | struct intel_iommu *iommu = map_ioapic_to_ir(apic_id); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1492 | struct irte irte; |
| 1493 | struct IR_IO_APIC_route_entry *ir_entry = |
| 1494 | (struct IR_IO_APIC_route_entry *) entry; |
| 1495 | int index; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1496 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1497 | if (!iommu) |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1498 | panic("No mapping iommu for ioapic %d\n", apic_id); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1499 | |
| 1500 | index = alloc_irte(iommu, irq, 1); |
| 1501 | if (index < 0) |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1502 | panic("Failed to allocate IRTE for ioapic %d\n", apic_id); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1503 | |
| 1504 | memset(&irte, 0, sizeof(irte)); |
| 1505 | |
| 1506 | irte.present = 1; |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 1507 | irte.dst_mode = apic->irq_dest_mode; |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 1508 | /* |
| 1509 | * Trigger mode in the IRTE will always be edge, and the |
| 1510 | * actual level or edge trigger will be setup in the IO-APIC |
| 1511 | * RTE. This will help simplify level triggered irq migration. |
| 1512 | * For more details, see the comments above explainig IO-APIC |
| 1513 | * irq migration in the presence of interrupt-remapping. |
| 1514 | */ |
| 1515 | irte.trigger_mode = 0; |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 1516 | irte.dlvry_mode = apic->irq_delivery_mode; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1517 | irte.vector = vector; |
| 1518 | irte.dest_id = IRTE_DEST(destination); |
| 1519 | |
| 1520 | modify_irte(irq, &irte); |
| 1521 | |
| 1522 | ir_entry->index2 = (index >> 15) & 0x1; |
| 1523 | ir_entry->zero = 0; |
| 1524 | ir_entry->format = 1; |
| 1525 | ir_entry->index = (index & 0x7fff); |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 1526 | /* |
| 1527 | * IO-APIC RTE will be configured with virtual vector. |
| 1528 | * irq handler will do the explicit EOI to the io-apic. |
| 1529 | */ |
| 1530 | ir_entry->vector = pin; |
Suresh Siddha | 29b61be | 2009-03-16 17:05:02 -0700 | [diff] [blame^] | 1531 | } else { |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 1532 | entry->delivery_mode = apic->irq_delivery_mode; |
| 1533 | entry->dest_mode = apic->irq_dest_mode; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1534 | entry->dest = destination; |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 1535 | entry->vector = vector; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1536 | } |
| 1537 | |
| 1538 | entry->mask = 0; /* enable IRQ */ |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1539 | entry->trigger = trigger; |
| 1540 | entry->polarity = polarity; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1541 | |
| 1542 | /* Mask level triggered irqs. |
| 1543 | * Use IRQ_DELAYED_DISABLE for edge triggered irqs. |
| 1544 | */ |
| 1545 | if (trigger) |
| 1546 | entry->mask = 1; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1547 | return 0; |
| 1548 | } |
| 1549 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1550 | static void setup_IO_APIC_irq(int apic_id, int pin, unsigned int irq, struct irq_desc *desc, |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1551 | int trigger, int polarity) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1552 | { |
| 1553 | struct irq_cfg *cfg; |
| 1554 | struct IO_APIC_route_entry entry; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 1555 | unsigned int dest; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1556 | |
| 1557 | if (!IO_APIC_IRQ(irq)) |
| 1558 | return; |
| 1559 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1560 | cfg = desc->chip_data; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1561 | |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 1562 | if (assign_irq_vector(irq, cfg, apic->target_cpus())) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1563 | return; |
| 1564 | |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 1565 | dest = apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus()); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1566 | |
| 1567 | apic_printk(APIC_VERBOSE,KERN_DEBUG |
| 1568 | "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> " |
| 1569 | "IRQ %d Mode:%i Active:%i)\n", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1570 | apic_id, mp_ioapics[apic_id].apicid, pin, cfg->vector, |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1571 | irq, trigger, polarity); |
| 1572 | |
| 1573 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1574 | if (setup_ioapic_entry(mp_ioapics[apic_id].apicid, irq, &entry, |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 1575 | dest, trigger, polarity, cfg->vector, pin)) { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1576 | printk("Failed to setup ioapic entry for ioapic %d, pin %d\n", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1577 | mp_ioapics[apic_id].apicid, pin); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1578 | __clear_irq_vector(irq, cfg); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1579 | return; |
| 1580 | } |
| 1581 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1582 | ioapic_register_intr(irq, desc, trigger); |
Yinghai Lu | 99d093d | 2008-12-05 18:58:32 -0800 | [diff] [blame] | 1583 | if (irq < NR_IRQS_LEGACY) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 1584 | disable_8259A_irq(irq); |
| 1585 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1586 | ioapic_write_entry(apic_id, pin, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | } |
| 1588 | |
| 1589 | static void __init setup_IO_APIC_irqs(void) |
| 1590 | { |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1591 | int apic_id, pin, idx, irq; |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1592 | int notcon = 0; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1593 | struct irq_desc *desc; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1594 | struct irq_cfg *cfg; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1595 | int cpu = boot_cpu_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | |
| 1597 | apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n"); |
| 1598 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1599 | for (apic_id = 0; apic_id < nr_ioapics; apic_id++) { |
| 1600 | for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1602 | idx = find_irq_entry(apic_id, pin, mp_INT); |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1603 | if (idx == -1) { |
Cyrill Gorcunov | 2a554fb | 2008-09-08 19:38:06 +0400 | [diff] [blame] | 1604 | if (!notcon) { |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1605 | notcon = 1; |
Cyrill Gorcunov | 2a554fb | 2008-09-08 19:38:06 +0400 | [diff] [blame] | 1606 | apic_printk(APIC_VERBOSE, |
| 1607 | KERN_DEBUG " %d-%d", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1608 | mp_ioapics[apic_id].apicid, pin); |
Cyrill Gorcunov | 2a554fb | 2008-09-08 19:38:06 +0400 | [diff] [blame] | 1609 | } else |
| 1610 | apic_printk(APIC_VERBOSE, " %d-%d", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1611 | mp_ioapics[apic_id].apicid, pin); |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1612 | continue; |
| 1613 | } |
Cyrill Gorcunov | 56ffa1a | 2008-09-13 13:11:16 +0400 | [diff] [blame] | 1614 | if (notcon) { |
| 1615 | apic_printk(APIC_VERBOSE, |
| 1616 | " (apicid-pin) not connected\n"); |
| 1617 | notcon = 0; |
| 1618 | } |
Yinghai Lu | 20d225b | 2007-10-17 18:04:41 +0200 | [diff] [blame] | 1619 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1620 | irq = pin_2_irq(idx, apic_id, pin); |
Ingo Molnar | 33a201f | 2009-01-28 07:17:26 +0100 | [diff] [blame] | 1621 | |
| 1622 | /* |
| 1623 | * Skip the timer IRQ if there's a quirk handler |
| 1624 | * installed and if it returns 1: |
| 1625 | */ |
| 1626 | if (apic->multi_timer_check && |
| 1627 | apic->multi_timer_check(apic_id, irq)) |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1628 | continue; |
Ingo Molnar | 33a201f | 2009-01-28 07:17:26 +0100 | [diff] [blame] | 1629 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1630 | desc = irq_to_desc_alloc_cpu(irq, cpu); |
| 1631 | if (!desc) { |
| 1632 | printk(KERN_INFO "can not get irq_desc for %d\n", irq); |
| 1633 | continue; |
| 1634 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 1635 | cfg = desc->chip_data; |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1636 | add_pin_to_irq_cpu(cfg, cpu, apic_id, pin); |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 1637 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1638 | setup_IO_APIC_irq(apic_id, pin, irq, desc, |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1639 | irq_trigger(idx), irq_polarity(idx)); |
| 1640 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | } |
| 1642 | |
Cyrill Gorcunov | 3c2cbd2 | 2008-09-06 14:15:33 +0400 | [diff] [blame] | 1643 | if (notcon) |
| 1644 | apic_printk(APIC_VERBOSE, |
Cyrill Gorcunov | 2a554fb | 2008-09-08 19:38:06 +0400 | [diff] [blame] | 1645 | " (apicid-pin) not connected\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | } |
| 1647 | |
| 1648 | /* |
Maciej W. Rozycki | f7633ce | 2008-05-27 21:19:34 +0100 | [diff] [blame] | 1649 | * Set up the timer pin, possibly with the 8259A-master behind. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | */ |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1651 | static void __init setup_timer_IRQ0_pin(unsigned int apic_id, unsigned int pin, |
Maciej W. Rozycki | f7633ce | 2008-05-27 21:19:34 +0100 | [diff] [blame] | 1652 | int vector) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | { |
| 1654 | struct IO_APIC_route_entry entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1656 | if (intr_remapping_enabled) |
| 1657 | return; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1658 | |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 1659 | memset(&entry, 0, sizeof(entry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | |
| 1661 | /* |
| 1662 | * We use logical delivery to get the timer IRQ |
| 1663 | * to the first CPU. |
| 1664 | */ |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 1665 | entry.dest_mode = apic->irq_dest_mode; |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 1666 | entry.mask = 0; /* don't mask IRQ for edge */ |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 1667 | entry.dest = apic->cpu_mask_to_apicid(apic->target_cpus()); |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 1668 | entry.delivery_mode = apic->irq_delivery_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | entry.polarity = 0; |
| 1670 | entry.trigger = 0; |
| 1671 | entry.vector = vector; |
| 1672 | |
| 1673 | /* |
| 1674 | * The timer IRQ doesn't have to know that behind the |
Maciej W. Rozycki | f7633ce | 2008-05-27 21:19:34 +0100 | [diff] [blame] | 1675 | * scene we may have a 8259A-master in AEOI mode ... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1677 | set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | |
| 1679 | /* |
| 1680 | * Add it to the IO-APIC irq-routing table: |
| 1681 | */ |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 1682 | ioapic_write_entry(apic_id, pin, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | } |
| 1684 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 1685 | |
| 1686 | __apicdebuginit(void) print_IO_APIC(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | { |
| 1688 | int apic, i; |
| 1689 | union IO_APIC_reg_00 reg_00; |
| 1690 | union IO_APIC_reg_01 reg_01; |
| 1691 | union IO_APIC_reg_02 reg_02; |
| 1692 | union IO_APIC_reg_03 reg_03; |
| 1693 | unsigned long flags; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 1694 | struct irq_cfg *cfg; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1695 | struct irq_desc *desc; |
Yinghai Lu | 8f09cd2 | 2008-08-19 20:50:51 -0700 | [diff] [blame] | 1696 | unsigned int irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | |
| 1698 | if (apic_verbosity == APIC_QUIET) |
| 1699 | return; |
| 1700 | |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 1701 | printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | for (i = 0; i < nr_ioapics; i++) |
| 1703 | printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n", |
Jaswinder Singh Rajput | b5ba7e6 | 2009-01-12 17:46:17 +0530 | [diff] [blame] | 1704 | mp_ioapics[i].apicid, nr_ioapic_registers[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | |
| 1706 | /* |
| 1707 | * We are a bit conservative about what we expect. We have to |
| 1708 | * know about every hardware change ASAP. |
| 1709 | */ |
| 1710 | printk(KERN_INFO "testing the IO APIC.......................\n"); |
| 1711 | |
| 1712 | for (apic = 0; apic < nr_ioapics; apic++) { |
| 1713 | |
| 1714 | spin_lock_irqsave(&ioapic_lock, flags); |
| 1715 | reg_00.raw = io_apic_read(apic, 0); |
| 1716 | reg_01.raw = io_apic_read(apic, 1); |
| 1717 | if (reg_01.bits.version >= 0x10) |
| 1718 | reg_02.raw = io_apic_read(apic, 2); |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 1719 | if (reg_01.bits.version >= 0x20) |
| 1720 | reg_03.raw = io_apic_read(apic, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 1722 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1723 | printk("\n"); |
Jaswinder Singh Rajput | b5ba7e6 | 2009-01-12 17:46:17 +0530 | [diff] [blame] | 1724 | printk(KERN_DEBUG "IO APIC #%d......\n", mp_ioapics[apic].apicid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw); |
| 1726 | printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID); |
| 1727 | printk(KERN_DEBUG "....... : Delivery Type: %X\n", reg_00.bits.delivery_type); |
| 1728 | printk(KERN_DEBUG "....... : LTS : %X\n", reg_00.bits.LTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1730 | printk(KERN_DEBUG ".... register #01: %08X\n", *(int *)®_01); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | printk(KERN_DEBUG "....... : max redirection entries: %04X\n", reg_01.bits.entries); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
| 1733 | printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ); |
| 1734 | printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | |
| 1736 | /* |
| 1737 | * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02, |
| 1738 | * but the value of reg_02 is read as the previous read register |
| 1739 | * value, so ignore it if reg_02 == reg_01. |
| 1740 | */ |
| 1741 | if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) { |
| 1742 | printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw); |
| 1743 | printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | } |
| 1745 | |
| 1746 | /* |
| 1747 | * Some Intel chipsets with IO APIC VERSION of 0x2? don't have reg_02 |
| 1748 | * or reg_03, but the value of reg_0[23] is read as the previous read |
| 1749 | * register value, so ignore it if reg_03 == reg_0[12]. |
| 1750 | */ |
| 1751 | if (reg_01.bits.version >= 0x20 && reg_03.raw != reg_02.raw && |
| 1752 | reg_03.raw != reg_01.raw) { |
| 1753 | printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw); |
| 1754 | printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | } |
| 1756 | |
| 1757 | printk(KERN_DEBUG ".... IRQ redirection table:\n"); |
| 1758 | |
Yinghai Lu | d83e94a | 2008-08-19 20:50:33 -0700 | [diff] [blame] | 1759 | printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol" |
| 1760 | " Stat Dmod Deli Vect: \n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | |
| 1762 | for (i = 0; i <= reg_01.bits.entries; i++) { |
| 1763 | struct IO_APIC_route_entry entry; |
| 1764 | |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 1765 | entry = ioapic_read_entry(apic, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1767 | printk(KERN_DEBUG " %02x %03X ", |
| 1768 | i, |
| 1769 | entry.dest |
| 1770 | ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | |
| 1772 | printk("%1d %1d %1d %1d %1d %1d %1d %02X\n", |
| 1773 | entry.mask, |
| 1774 | entry.trigger, |
| 1775 | entry.irr, |
| 1776 | entry.polarity, |
| 1777 | entry.delivery_status, |
| 1778 | entry.dest_mode, |
| 1779 | entry.delivery_mode, |
| 1780 | entry.vector |
| 1781 | ); |
| 1782 | } |
| 1783 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | printk(KERN_DEBUG "IRQ to pin mappings:\n"); |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1785 | for_each_irq_desc(irq, desc) { |
| 1786 | struct irq_pin_list *entry; |
| 1787 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 1788 | cfg = desc->chip_data; |
| 1789 | entry = cfg->irq_2_pin; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 1790 | if (!entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | continue; |
Yinghai Lu | 8f09cd2 | 2008-08-19 20:50:51 -0700 | [diff] [blame] | 1792 | printk(KERN_DEBUG "IRQ%d ", irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | for (;;) { |
| 1794 | printk("-> %d:%d", entry->apic, entry->pin); |
| 1795 | if (!entry->next) |
| 1796 | break; |
Yinghai Lu | 0f978f4 | 2008-08-19 20:50:26 -0700 | [diff] [blame] | 1797 | entry = entry->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | } |
| 1799 | printk("\n"); |
| 1800 | } |
| 1801 | |
| 1802 | printk(KERN_INFO ".................................... done.\n"); |
| 1803 | |
| 1804 | return; |
| 1805 | } |
| 1806 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 1807 | __apicdebuginit(void) print_APIC_bitfield(int base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | { |
| 1809 | unsigned int v; |
| 1810 | int i, j; |
| 1811 | |
| 1812 | if (apic_verbosity == APIC_QUIET) |
| 1813 | return; |
| 1814 | |
| 1815 | printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG); |
| 1816 | for (i = 0; i < 8; i++) { |
| 1817 | v = apic_read(base + i*0x10); |
| 1818 | for (j = 0; j < 32; j++) { |
| 1819 | if (v & (1<<j)) |
| 1820 | printk("1"); |
| 1821 | else |
| 1822 | printk("0"); |
| 1823 | } |
| 1824 | printk("\n"); |
| 1825 | } |
| 1826 | } |
| 1827 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 1828 | __apicdebuginit(void) print_local_APIC(void *dummy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | { |
| 1830 | unsigned int v, ver, maxlvt; |
Hiroshi Shimamoto | 7ab6af7 | 2008-07-30 17:36:48 -0700 | [diff] [blame] | 1831 | u64 icr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | |
| 1833 | if (apic_verbosity == APIC_QUIET) |
| 1834 | return; |
| 1835 | |
| 1836 | printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n", |
| 1837 | smp_processor_id(), hard_smp_processor_id()); |
Andreas Herrmann | 6682311 | 2008-06-05 16:35:10 +0200 | [diff] [blame] | 1838 | v = apic_read(APIC_ID); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1839 | printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, read_apic_id()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | v = apic_read(APIC_LVR); |
| 1841 | printk(KERN_INFO "... APIC VERSION: %08x\n", v); |
| 1842 | ver = GET_APIC_VERSION(v); |
Thomas Gleixner | e05d723 | 2007-02-16 01:27:58 -0800 | [diff] [blame] | 1843 | maxlvt = lapic_get_maxlvt(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
| 1845 | v = apic_read(APIC_TASKPRI); |
| 1846 | printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK); |
| 1847 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1848 | if (APIC_INTEGRATED(ver)) { /* !82489DX */ |
Yinghai Lu | a11b5ab | 2008-09-03 16:58:31 -0700 | [diff] [blame] | 1849 | if (!APIC_XAPIC(ver)) { |
| 1850 | v = apic_read(APIC_ARBPRI); |
| 1851 | printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v, |
| 1852 | v & APIC_ARBPRI_MASK); |
| 1853 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | v = apic_read(APIC_PROCPRI); |
| 1855 | printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v); |
| 1856 | } |
| 1857 | |
Yinghai Lu | a11b5ab | 2008-09-03 16:58:31 -0700 | [diff] [blame] | 1858 | /* |
| 1859 | * Remote read supported only in the 82489DX and local APIC for |
| 1860 | * Pentium processors. |
| 1861 | */ |
| 1862 | if (!APIC_INTEGRATED(ver) || maxlvt == 3) { |
| 1863 | v = apic_read(APIC_RRR); |
| 1864 | printk(KERN_DEBUG "... APIC RRR: %08x\n", v); |
| 1865 | } |
| 1866 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | v = apic_read(APIC_LDR); |
| 1868 | printk(KERN_DEBUG "... APIC LDR: %08x\n", v); |
Yinghai Lu | a11b5ab | 2008-09-03 16:58:31 -0700 | [diff] [blame] | 1869 | if (!x2apic_enabled()) { |
| 1870 | v = apic_read(APIC_DFR); |
| 1871 | printk(KERN_DEBUG "... APIC DFR: %08x\n", v); |
| 1872 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | v = apic_read(APIC_SPIV); |
| 1874 | printk(KERN_DEBUG "... APIC SPIV: %08x\n", v); |
| 1875 | |
| 1876 | printk(KERN_DEBUG "... APIC ISR field:\n"); |
| 1877 | print_APIC_bitfield(APIC_ISR); |
| 1878 | printk(KERN_DEBUG "... APIC TMR field:\n"); |
| 1879 | print_APIC_bitfield(APIC_TMR); |
| 1880 | printk(KERN_DEBUG "... APIC IRR field:\n"); |
| 1881 | print_APIC_bitfield(APIC_IRR); |
| 1882 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1883 | if (APIC_INTEGRATED(ver)) { /* !82489DX */ |
| 1884 | if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | apic_write(APIC_ESR, 0); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | v = apic_read(APIC_ESR); |
| 1888 | printk(KERN_DEBUG "... APIC ESR: %08x\n", v); |
| 1889 | } |
| 1890 | |
Hiroshi Shimamoto | 7ab6af7 | 2008-07-30 17:36:48 -0700 | [diff] [blame] | 1891 | icr = apic_icr_read(); |
Ingo Molnar | 0c425ce | 2008-08-18 13:04:26 +0200 | [diff] [blame] | 1892 | printk(KERN_DEBUG "... APIC ICR: %08x\n", (u32)icr); |
| 1893 | printk(KERN_DEBUG "... APIC ICR2: %08x\n", (u32)(icr >> 32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | |
| 1895 | v = apic_read(APIC_LVTT); |
| 1896 | printk(KERN_DEBUG "... APIC LVTT: %08x\n", v); |
| 1897 | |
| 1898 | if (maxlvt > 3) { /* PC is LVT#4. */ |
| 1899 | v = apic_read(APIC_LVTPC); |
| 1900 | printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v); |
| 1901 | } |
| 1902 | v = apic_read(APIC_LVT0); |
| 1903 | printk(KERN_DEBUG "... APIC LVT0: %08x\n", v); |
| 1904 | v = apic_read(APIC_LVT1); |
| 1905 | printk(KERN_DEBUG "... APIC LVT1: %08x\n", v); |
| 1906 | |
| 1907 | if (maxlvt > 2) { /* ERR is LVT#3. */ |
| 1908 | v = apic_read(APIC_LVTERR); |
| 1909 | printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v); |
| 1910 | } |
| 1911 | |
| 1912 | v = apic_read(APIC_TMICT); |
| 1913 | printk(KERN_DEBUG "... APIC TMICT: %08x\n", v); |
| 1914 | v = apic_read(APIC_TMCCT); |
| 1915 | printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v); |
| 1916 | v = apic_read(APIC_TDCR); |
| 1917 | printk(KERN_DEBUG "... APIC TDCR: %08x\n", v); |
| 1918 | printk("\n"); |
| 1919 | } |
| 1920 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 1921 | __apicdebuginit(void) print_all_local_APICs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | { |
Yinghai Lu | ffd5aae | 2008-08-19 20:50:50 -0700 | [diff] [blame] | 1923 | int cpu; |
| 1924 | |
| 1925 | preempt_disable(); |
| 1926 | for_each_online_cpu(cpu) |
| 1927 | smp_call_function_single(cpu, print_local_APIC, NULL, 1); |
| 1928 | preempt_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | } |
| 1930 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 1931 | __apicdebuginit(void) print_PIC(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | unsigned int v; |
| 1934 | unsigned long flags; |
| 1935 | |
| 1936 | if (apic_verbosity == APIC_QUIET) |
| 1937 | return; |
| 1938 | |
| 1939 | printk(KERN_DEBUG "\nprinting PIC contents\n"); |
| 1940 | |
| 1941 | spin_lock_irqsave(&i8259A_lock, flags); |
| 1942 | |
| 1943 | v = inb(0xa1) << 8 | inb(0x21); |
| 1944 | printk(KERN_DEBUG "... PIC IMR: %04x\n", v); |
| 1945 | |
| 1946 | v = inb(0xa0) << 8 | inb(0x20); |
| 1947 | printk(KERN_DEBUG "... PIC IRR: %04x\n", v); |
| 1948 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1949 | outb(0x0b,0xa0); |
| 1950 | outb(0x0b,0x20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | v = inb(0xa0) << 8 | inb(0x20); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1952 | outb(0x0a,0xa0); |
| 1953 | outb(0x0a,0x20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | |
| 1955 | spin_unlock_irqrestore(&i8259A_lock, flags); |
| 1956 | |
| 1957 | printk(KERN_DEBUG "... PIC ISR: %04x\n", v); |
| 1958 | |
| 1959 | v = inb(0x4d1) << 8 | inb(0x4d0); |
| 1960 | printk(KERN_DEBUG "... PIC ELCR: %04x\n", v); |
| 1961 | } |
| 1962 | |
Maciej W. Rozycki | 32f71af | 2008-07-21 00:52:49 +0100 | [diff] [blame] | 1963 | __apicdebuginit(int) print_all_ICs(void) |
| 1964 | { |
| 1965 | print_PIC(); |
| 1966 | print_all_local_APICs(); |
| 1967 | print_IO_APIC(); |
| 1968 | |
| 1969 | return 0; |
| 1970 | } |
| 1971 | |
| 1972 | fs_initcall(print_all_ICs); |
| 1973 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 1975 | /* Where if anywhere is the i8259 connect in external int mode */ |
| 1976 | static struct { int pin, apic; } ioapic_i8259 = { -1, -1 }; |
| 1977 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1978 | void __init enable_IO_APIC(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | { |
| 1980 | union IO_APIC_reg_01 reg_01; |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 1981 | int i8259_apic, i8259_pin; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1982 | int apic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | unsigned long flags; |
| 1984 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | /* |
| 1986 | * The number of IO-APIC IRQ registers (== #pins): |
| 1987 | */ |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 1988 | for (apic = 0; apic < nr_ioapics; apic++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | spin_lock_irqsave(&ioapic_lock, flags); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 1990 | reg_01.raw = io_apic_read(apic, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | spin_unlock_irqrestore(&ioapic_lock, flags); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 1992 | nr_ioapic_registers[apic] = reg_01.bits.entries+1; |
| 1993 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 1994 | for(apic = 0; apic < nr_ioapics; apic++) { |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 1995 | int pin; |
| 1996 | /* See if any of the pins is in ExtINT mode */ |
Eric W. Biederman | 1008fdd | 2006-01-11 22:46:06 +0100 | [diff] [blame] | 1997 | for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) { |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 1998 | struct IO_APIC_route_entry entry; |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 1999 | entry = ioapic_read_entry(apic, pin); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2000 | |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2001 | /* If the interrupt line is enabled and in ExtInt mode |
| 2002 | * I have found the pin where the i8259 is connected. |
| 2003 | */ |
| 2004 | if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) { |
| 2005 | ioapic_i8259.apic = apic; |
| 2006 | ioapic_i8259.pin = pin; |
| 2007 | goto found_i8259; |
| 2008 | } |
| 2009 | } |
| 2010 | } |
| 2011 | found_i8259: |
| 2012 | /* Look to see what if the MP table has reported the ExtINT */ |
| 2013 | /* If we could not find the appropriate pin by looking at the ioapic |
| 2014 | * the i8259 probably is not connected the ioapic but give the |
| 2015 | * mptable a chance anyway. |
| 2016 | */ |
| 2017 | i8259_pin = find_isa_irq_pin(0, mp_ExtINT); |
| 2018 | i8259_apic = find_isa_irq_apic(0, mp_ExtINT); |
| 2019 | /* Trust the MP table if nothing is setup in the hardware */ |
| 2020 | if ((ioapic_i8259.pin == -1) && (i8259_pin >= 0)) { |
| 2021 | printk(KERN_WARNING "ExtINT not setup in hardware but reported by MP table\n"); |
| 2022 | ioapic_i8259.pin = i8259_pin; |
| 2023 | ioapic_i8259.apic = i8259_apic; |
| 2024 | } |
| 2025 | /* Complain if the MP table and the hardware disagree */ |
| 2026 | if (((ioapic_i8259.apic != i8259_apic) || (ioapic_i8259.pin != i8259_pin)) && |
| 2027 | (i8259_pin >= 0) && (ioapic_i8259.pin >= 0)) |
| 2028 | { |
| 2029 | printk(KERN_WARNING "ExtINT in hardware and MP table differ\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | } |
| 2031 | |
| 2032 | /* |
| 2033 | * Do not trust the IO-APIC being empty at bootup |
| 2034 | */ |
| 2035 | clear_IO_APIC(); |
| 2036 | } |
| 2037 | |
| 2038 | /* |
| 2039 | * Not an __init, needed by the reboot code |
| 2040 | */ |
| 2041 | void disable_IO_APIC(void) |
| 2042 | { |
| 2043 | /* |
| 2044 | * Clear the IO-APIC before rebooting: |
| 2045 | */ |
| 2046 | clear_IO_APIC(); |
| 2047 | |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2048 | /* |
Karsten Wiese | 0b968d2 | 2005-09-09 12:59:04 +0200 | [diff] [blame] | 2049 | * If the i8259 is routed through an IOAPIC |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2050 | * Put that IOAPIC in virtual wire mode |
Karsten Wiese | 0b968d2 | 2005-09-09 12:59:04 +0200 | [diff] [blame] | 2051 | * so legacy interrupts can be delivered. |
Suresh Siddha | 7c6d9f9 | 2009-03-16 17:04:59 -0700 | [diff] [blame] | 2052 | * |
| 2053 | * With interrupt-remapping, for now we will use virtual wire A mode, |
| 2054 | * as virtual wire B is little complex (need to configure both |
| 2055 | * IOAPIC RTE aswell as interrupt-remapping table entry). |
| 2056 | * As this gets called during crash dump, keep this simple for now. |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2057 | */ |
Suresh Siddha | 7c6d9f9 | 2009-03-16 17:04:59 -0700 | [diff] [blame] | 2058 | if (ioapic_i8259.pin != -1 && !intr_remapping_enabled) { |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2059 | struct IO_APIC_route_entry entry; |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2060 | |
| 2061 | memset(&entry, 0, sizeof(entry)); |
| 2062 | entry.mask = 0; /* Enabled */ |
| 2063 | entry.trigger = 0; /* Edge */ |
| 2064 | entry.irr = 0; |
| 2065 | entry.polarity = 0; /* High */ |
| 2066 | entry.delivery_status = 0; |
| 2067 | entry.dest_mode = 0; /* Physical */ |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2068 | entry.delivery_mode = dest_ExtINT; /* ExtInt */ |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2069 | entry.vector = 0; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2070 | entry.dest = read_apic_id(); |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2071 | |
| 2072 | /* |
| 2073 | * Add it to the IO-APIC irq-routing table: |
| 2074 | */ |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 2075 | ioapic_write_entry(ioapic_i8259.apic, ioapic_i8259.pin, entry); |
Eric W. Biederman | 650927e | 2005-06-25 14:57:44 -0700 | [diff] [blame] | 2076 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2077 | |
Suresh Siddha | 7c6d9f9 | 2009-03-16 17:04:59 -0700 | [diff] [blame] | 2078 | /* |
| 2079 | * Use virtual wire A mode when interrupt remapping is enabled. |
| 2080 | */ |
| 2081 | disconnect_bsp_APIC(!intr_remapping_enabled && ioapic_i8259.pin != -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | } |
| 2083 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2084 | #ifdef CONFIG_X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | /* |
| 2086 | * function to set the IO-APIC physical IDs based on the |
| 2087 | * values stored in the MPC table. |
| 2088 | * |
| 2089 | * by Matt Domsch <Matt_Domsch@dell.com> Tue Dec 21 12:25:05 CST 1999 |
| 2090 | */ |
| 2091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | static void __init setup_ioapic_ids_from_mpc(void) |
| 2093 | { |
| 2094 | union IO_APIC_reg_00 reg_00; |
| 2095 | physid_mask_t phys_id_present_map; |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2096 | int apic_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | int i; |
| 2098 | unsigned char old_id; |
| 2099 | unsigned long flags; |
| 2100 | |
Yinghai Lu | a4dbc34 | 2008-07-25 02:14:28 -0700 | [diff] [blame] | 2101 | if (x86_quirks->setup_ioapic_ids && x86_quirks->setup_ioapic_ids()) |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 2102 | return; |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 2103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | /* |
Natalie Protasevich | ca05fea | 2005-06-23 00:08:22 -0700 | [diff] [blame] | 2105 | * Don't check I/O APIC IDs for xAPIC systems. They have |
| 2106 | * no meaning without the serial APIC bus. |
| 2107 | */ |
Shaohua Li | 7c5c1e4 | 2006-03-23 02:59:53 -0800 | [diff] [blame] | 2108 | if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) |
| 2109 | || APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) |
Natalie Protasevich | ca05fea | 2005-06-23 00:08:22 -0700 | [diff] [blame] | 2110 | return; |
| 2111 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | * This is broken; anything with a real cpu count has to |
| 2113 | * circumvent this idiocy regardless. |
| 2114 | */ |
Ingo Molnar | d190cb8 | 2009-01-28 06:50:47 +0100 | [diff] [blame] | 2115 | phys_id_present_map = apic->ioapic_phys_id_map(phys_cpu_present_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | |
| 2117 | /* |
| 2118 | * Set the IOAPIC ID to the value stored in the MPC table. |
| 2119 | */ |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2120 | for (apic_id = 0; apic_id < nr_ioapics; apic_id++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | |
| 2122 | /* Read the register 0 value */ |
| 2123 | spin_lock_irqsave(&ioapic_lock, flags); |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2124 | reg_00.raw = io_apic_read(apic_id, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | spin_unlock_irqrestore(&ioapic_lock, flags); |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 2126 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2127 | old_id = mp_ioapics[apic_id].apicid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2129 | if (mp_ioapics[apic_id].apicid >= get_physical_broadcast()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2131 | apic_id, mp_ioapics[apic_id].apicid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n", |
| 2133 | reg_00.bits.ID); |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2134 | mp_ioapics[apic_id].apicid = reg_00.bits.ID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | } |
| 2136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | /* |
| 2138 | * Sanity check, is the ID really free? Every APIC in a |
| 2139 | * system must have a unique ID or we get lots of nice |
| 2140 | * 'stuck on smp_invalidate_needed IPI wait' messages. |
| 2141 | */ |
Ingo Molnar | d1d7cae | 2009-01-28 05:41:42 +0100 | [diff] [blame] | 2142 | if (apic->check_apicid_used(phys_id_present_map, |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2143 | mp_ioapics[apic_id].apicid)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2145 | apic_id, mp_ioapics[apic_id].apicid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | for (i = 0; i < get_physical_broadcast(); i++) |
| 2147 | if (!physid_isset(i, phys_id_present_map)) |
| 2148 | break; |
| 2149 | if (i >= get_physical_broadcast()) |
| 2150 | panic("Max APIC ID exceeded!\n"); |
| 2151 | printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n", |
| 2152 | i); |
| 2153 | physid_set(i, phys_id_present_map); |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2154 | mp_ioapics[apic_id].apicid = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | } else { |
| 2156 | physid_mask_t tmp; |
Ingo Molnar | 8058714 | 2009-01-28 06:50:47 +0100 | [diff] [blame] | 2157 | tmp = apic->apicid_to_cpu_present(mp_ioapics[apic_id].apicid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | apic_printk(APIC_VERBOSE, "Setting %d in the " |
| 2159 | "phys_id_present_map\n", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2160 | mp_ioapics[apic_id].apicid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | physids_or(phys_id_present_map, phys_id_present_map, tmp); |
| 2162 | } |
| 2163 | |
| 2164 | |
| 2165 | /* |
| 2166 | * We need to adjust the IRQ routing table |
| 2167 | * if the ID changed. |
| 2168 | */ |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2169 | if (old_id != mp_ioapics[apic_id].apicid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | for (i = 0; i < mp_irq_entries; i++) |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 2171 | if (mp_irqs[i].dstapic == old_id) |
| 2172 | mp_irqs[i].dstapic |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2173 | = mp_ioapics[apic_id].apicid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
| 2175 | /* |
| 2176 | * Read the right value from the MPC table and |
| 2177 | * write it into the ID register. |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 2178 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | apic_printk(APIC_VERBOSE, KERN_INFO |
| 2180 | "...changing IO-APIC physical APIC ID to %d ...", |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2181 | mp_ioapics[apic_id].apicid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2183 | reg_00.bits.ID = mp_ioapics[apic_id].apicid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | spin_lock_irqsave(&ioapic_lock, flags); |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2185 | io_apic_write(apic_id, 0, reg_00.raw); |
Yinghai Lu | a2d332f | 2008-08-21 12:56:32 -0700 | [diff] [blame] | 2186 | spin_unlock_irqrestore(&ioapic_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | |
| 2188 | /* |
| 2189 | * Sanity check |
| 2190 | */ |
| 2191 | spin_lock_irqsave(&ioapic_lock, flags); |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2192 | reg_00.raw = io_apic_read(apic_id, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | spin_unlock_irqrestore(&ioapic_lock, flags); |
Ingo Molnar | c8d46cf | 2009-01-28 00:14:11 +0100 | [diff] [blame] | 2194 | if (reg_00.bits.ID != mp_ioapics[apic_id].apicid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | printk("could not set ID!\n"); |
| 2196 | else |
| 2197 | apic_printk(APIC_VERBOSE, " ok.\n"); |
| 2198 | } |
| 2199 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2200 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 2202 | int no_timer_check __initdata; |
Zachary Amsden | 8542b20 | 2006-12-07 02:14:09 +0100 | [diff] [blame] | 2203 | |
| 2204 | static int __init notimercheck(char *s) |
| 2205 | { |
| 2206 | no_timer_check = 1; |
| 2207 | return 1; |
| 2208 | } |
| 2209 | __setup("no_timer_check", notimercheck); |
| 2210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | /* |
| 2212 | * There is a nasty bug in some older SMP boards, their mptable lies |
| 2213 | * about the timer IRQ. We do the following to work around the situation: |
| 2214 | * |
| 2215 | * - timer IRQ defaults to IO-APIC IRQ |
| 2216 | * - if this function detects that timer IRQs are defunct, then we fall |
| 2217 | * back to ISA timer IRQs |
| 2218 | */ |
Adrian Bunk | f0a7a5c | 2007-07-21 17:10:29 +0200 | [diff] [blame] | 2219 | static int __init timer_irq_works(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | { |
| 2221 | unsigned long t1 = jiffies; |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2222 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | |
Zachary Amsden | 8542b20 | 2006-12-07 02:14:09 +0100 | [diff] [blame] | 2224 | if (no_timer_check) |
| 2225 | return 1; |
| 2226 | |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2227 | local_save_flags(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | local_irq_enable(); |
| 2229 | /* Let ten ticks pass... */ |
| 2230 | mdelay((10 * 1000) / HZ); |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2231 | local_irq_restore(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | |
| 2233 | /* |
| 2234 | * Expect a few ticks at least, to be sure some possible |
| 2235 | * glue logic does not lock up after one or two first |
| 2236 | * ticks in a non-ExtINT mode. Also the local APIC |
| 2237 | * might have cached one ExtINT interrupt. Finally, at |
| 2238 | * least one tick may be lost due to delays. |
| 2239 | */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2240 | |
| 2241 | /* jiffies wrap? */ |
Julia Lawall | 1d16b53 | 2008-01-30 13:32:19 +0100 | [diff] [blame] | 2242 | if (time_after(jiffies, t1 + 4)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | return 0; |
| 2245 | } |
| 2246 | |
| 2247 | /* |
| 2248 | * In the SMP+IOAPIC case it might happen that there are an unspecified |
| 2249 | * number of pending IRQ events unhandled. These cases are very rare, |
| 2250 | * so we 'resend' these IRQs via IPIs, to the same CPU. It's much |
| 2251 | * better to do it this way as thus we do not have to be aware of |
| 2252 | * 'pending' interrupts in the IRQ path, except at this point. |
| 2253 | */ |
| 2254 | /* |
| 2255 | * Edge triggered needs to resend any interrupt |
| 2256 | * that was delayed but this is now handled in the device |
| 2257 | * independent code. |
| 2258 | */ |
| 2259 | |
| 2260 | /* |
| 2261 | * Starting up a edge-triggered IO-APIC interrupt is |
| 2262 | * nasty - we need to make sure that we get the edge. |
| 2263 | * If it is already asserted for some reason, we need |
| 2264 | * return 1 to indicate that is was pending. |
| 2265 | * |
| 2266 | * This is not complete - we should be able to fake |
| 2267 | * an edge even if it isn't on the 8259A... |
| 2268 | */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2269 | |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 2270 | static unsigned int startup_ioapic_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | { |
| 2272 | int was_pending = 0; |
| 2273 | unsigned long flags; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 2274 | struct irq_cfg *cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | |
| 2276 | spin_lock_irqsave(&ioapic_lock, flags); |
Yinghai Lu | 99d093d | 2008-12-05 18:58:32 -0800 | [diff] [blame] | 2277 | if (irq < NR_IRQS_LEGACY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | disable_8259A_irq(irq); |
| 2279 | if (i8259A_irq_pending(irq)) |
| 2280 | was_pending = 1; |
| 2281 | } |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 2282 | cfg = irq_cfg(irq); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2283 | __unmask_IO_APIC_irq(cfg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 2285 | |
| 2286 | return was_pending; |
| 2287 | } |
| 2288 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2289 | #ifdef CONFIG_X86_64 |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 2290 | static int ioapic_retrigger_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2292 | |
| 2293 | struct irq_cfg *cfg = irq_cfg(irq); |
| 2294 | unsigned long flags; |
| 2295 | |
| 2296 | spin_lock_irqsave(&vector_lock, flags); |
Ingo Molnar | dac5f41 | 2009-01-28 15:42:24 +0100 | [diff] [blame] | 2297 | apic->send_IPI_mask(cpumask_of(cpumask_first(cfg->domain)), cfg->vector); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2298 | spin_unlock_irqrestore(&vector_lock, flags); |
Ingo Molnar | c0ad90a | 2006-06-29 02:24:44 -0700 | [diff] [blame] | 2299 | |
| 2300 | return 1; |
| 2301 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2302 | #else |
| 2303 | static int ioapic_retrigger_irq(unsigned int irq) |
| 2304 | { |
Ingo Molnar | dac5f41 | 2009-01-28 15:42:24 +0100 | [diff] [blame] | 2305 | apic->send_IPI_self(irq_cfg(irq)->vector); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2306 | |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 2307 | return 1; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2308 | } |
| 2309 | #endif |
| 2310 | |
| 2311 | /* |
| 2312 | * Level and edge triggered IO-APIC interrupts need different handling, |
| 2313 | * so we use two separate IRQ descriptors. Edge triggered IRQs can be |
| 2314 | * handled with the level-triggered descriptor, but that one has slightly |
| 2315 | * more overhead. Level-triggered interrupts cannot be handled with the |
| 2316 | * edge-triggered handler, without risking IRQ storms and other ugly |
| 2317 | * races. |
| 2318 | */ |
Ingo Molnar | c0ad90a | 2006-06-29 02:24:44 -0700 | [diff] [blame] | 2319 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2320 | #ifdef CONFIG_SMP |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2321 | |
| 2322 | #ifdef CONFIG_INTR_REMAP |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2323 | |
| 2324 | /* |
| 2325 | * Migrate the IO-APIC irq in the presence of intr-remapping. |
| 2326 | * |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 2327 | * For both level and edge triggered, irq migration is a simple atomic |
| 2328 | * update(of vector and cpu destination) of IRTE and flush the hardware cache. |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2329 | * |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 2330 | * For level triggered, we eliminate the io-apic RTE modification (with the |
| 2331 | * updated vector information), by using a virtual vector (io-apic pin number). |
| 2332 | * Real vector that is used for interrupting cpu will be coming from |
| 2333 | * the interrupt-remapping table entry. |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2334 | */ |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 2335 | static void |
| 2336 | migrate_ioapic_irq_desc(struct irq_desc *desc, const struct cpumask *mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2337 | { |
| 2338 | struct irq_cfg *cfg; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2339 | struct irte irte; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2340 | unsigned int dest; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2341 | unsigned int irq; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2342 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 2343 | if (!cpumask_intersects(mask, cpu_online_mask)) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2344 | return; |
| 2345 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2346 | irq = desc->irq; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2347 | if (get_irte(irq, &irte)) |
| 2348 | return; |
| 2349 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2350 | cfg = desc->chip_data; |
| 2351 | if (assign_irq_vector(irq, cfg, mask)) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2352 | return; |
| 2353 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2354 | set_extra_move_desc(desc, mask); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2355 | |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 2356 | dest = apic->cpu_mask_to_apicid_and(cfg->domain, mask); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2357 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2358 | irte.vector = cfg->vector; |
| 2359 | irte.dest_id = IRTE_DEST(dest); |
| 2360 | |
| 2361 | /* |
| 2362 | * Modified the IRTE and flushes the Interrupt entry cache. |
| 2363 | */ |
| 2364 | modify_irte(irq, &irte); |
| 2365 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 2366 | if (cfg->move_in_progress) |
| 2367 | send_cleanup_vector(cfg); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2368 | |
Mike Travis | 7f7ace0 | 2009-01-10 21:58:08 -0800 | [diff] [blame] | 2369 | cpumask_copy(desc->affinity, mask); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2370 | } |
| 2371 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2372 | /* |
| 2373 | * Migrates the IRQ destination in the process context. |
| 2374 | */ |
Rusty Russell | 968ea6d | 2008-12-13 21:55:51 +1030 | [diff] [blame] | 2375 | static void set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc, |
| 2376 | const struct cpumask *mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2377 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2378 | migrate_ioapic_irq_desc(desc, mask); |
| 2379 | } |
Rusty Russell | 0de2652 | 2008-12-13 21:20:26 +1030 | [diff] [blame] | 2380 | static void set_ir_ioapic_affinity_irq(unsigned int irq, |
| 2381 | const struct cpumask *mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2382 | { |
| 2383 | struct irq_desc *desc = irq_to_desc(irq); |
| 2384 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2385 | set_ir_ioapic_affinity_irq_desc(desc, mask); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2386 | } |
Suresh Siddha | 29b61be | 2009-03-16 17:05:02 -0700 | [diff] [blame^] | 2387 | #else |
| 2388 | static inline void set_ir_ioapic_affinity_irq_desc(struct irq_desc *desc, |
| 2389 | const struct cpumask *mask) |
| 2390 | { |
| 2391 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2392 | #endif |
| 2393 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2394 | asmlinkage void smp_irq_move_cleanup_interrupt(void) |
| 2395 | { |
| 2396 | unsigned vector, me; |
Hiroshi Shimamoto | 8f2466f | 2008-12-08 19:19:07 -0800 | [diff] [blame] | 2397 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2398 | ack_APIC_irq(); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2399 | exit_idle(); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2400 | irq_enter(); |
| 2401 | |
| 2402 | me = smp_processor_id(); |
| 2403 | for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { |
| 2404 | unsigned int irq; |
| 2405 | struct irq_desc *desc; |
| 2406 | struct irq_cfg *cfg; |
| 2407 | irq = __get_cpu_var(vector_irq)[vector]; |
| 2408 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 2409 | if (irq == -1) |
| 2410 | continue; |
| 2411 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2412 | desc = irq_to_desc(irq); |
| 2413 | if (!desc) |
| 2414 | continue; |
| 2415 | |
| 2416 | cfg = irq_cfg(irq); |
| 2417 | spin_lock(&desc->lock); |
| 2418 | if (!cfg->move_cleanup_count) |
| 2419 | goto unlock; |
| 2420 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 2421 | if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2422 | goto unlock; |
| 2423 | |
| 2424 | __get_cpu_var(vector_irq)[vector] = -1; |
| 2425 | cfg->move_cleanup_count--; |
| 2426 | unlock: |
| 2427 | spin_unlock(&desc->lock); |
| 2428 | } |
| 2429 | |
| 2430 | irq_exit(); |
| 2431 | } |
| 2432 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2433 | static void irq_complete_move(struct irq_desc **descp) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2434 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2435 | struct irq_desc *desc = *descp; |
| 2436 | struct irq_cfg *cfg = desc->chip_data; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2437 | unsigned vector, me; |
| 2438 | |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 2439 | if (likely(!cfg->move_in_progress)) { |
| 2440 | #ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC |
| 2441 | if (likely(!cfg->move_desc_pending)) |
| 2442 | return; |
| 2443 | |
Yinghai Lu | b909895 | 2008-12-19 13:48:34 -0800 | [diff] [blame] | 2444 | /* domain has not changed, but affinity did */ |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 2445 | me = smp_processor_id(); |
Mike Travis | 7f7ace0 | 2009-01-10 21:58:08 -0800 | [diff] [blame] | 2446 | if (cpumask_test_cpu(me, desc->affinity)) { |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 2447 | *descp = desc = move_irq_desc(desc, me); |
| 2448 | /* get the new one */ |
| 2449 | cfg = desc->chip_data; |
| 2450 | cfg->move_desc_pending = 0; |
| 2451 | } |
| 2452 | #endif |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2453 | return; |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 2454 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2455 | |
| 2456 | vector = ~get_irq_regs()->orig_ax; |
| 2457 | me = smp_processor_id(); |
Yinghai Lu | 10b888d | 2009-01-31 14:50:07 -0800 | [diff] [blame] | 2458 | |
| 2459 | if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) { |
Yinghai Lu | 48a1b10 | 2008-12-11 00:15:01 -0800 | [diff] [blame] | 2460 | #ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC |
| 2461 | *descp = desc = move_irq_desc(desc, me); |
| 2462 | /* get the new one */ |
| 2463 | cfg = desc->chip_data; |
| 2464 | #endif |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 2465 | send_cleanup_vector(cfg); |
Yinghai Lu | 10b888d | 2009-01-31 14:50:07 -0800 | [diff] [blame] | 2466 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2467 | } |
| 2468 | #else |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2469 | static inline void irq_complete_move(struct irq_desc **descp) {} |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2470 | #endif |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2471 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2472 | #ifdef CONFIG_INTR_REMAP |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 2473 | static void __eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg) |
| 2474 | { |
| 2475 | int apic, pin; |
| 2476 | struct irq_pin_list *entry; |
| 2477 | |
| 2478 | entry = cfg->irq_2_pin; |
| 2479 | for (;;) { |
| 2480 | |
| 2481 | if (!entry) |
| 2482 | break; |
| 2483 | |
| 2484 | apic = entry->apic; |
| 2485 | pin = entry->pin; |
| 2486 | io_apic_eoi(apic, pin); |
| 2487 | entry = entry->next; |
| 2488 | } |
| 2489 | } |
| 2490 | |
| 2491 | static void |
| 2492 | eoi_ioapic_irq(struct irq_desc *desc) |
| 2493 | { |
| 2494 | struct irq_cfg *cfg; |
| 2495 | unsigned long flags; |
| 2496 | unsigned int irq; |
| 2497 | |
| 2498 | irq = desc->irq; |
| 2499 | cfg = desc->chip_data; |
| 2500 | |
| 2501 | spin_lock_irqsave(&ioapic_lock, flags); |
| 2502 | __eoi_ioapic_irq(irq, cfg); |
| 2503 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 2504 | } |
| 2505 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2506 | static void ack_x2apic_level(unsigned int irq) |
| 2507 | { |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 2508 | struct irq_desc *desc = irq_to_desc(irq); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2509 | ack_x2APIC_irq(); |
Suresh Siddha | 0280f7c | 2009-03-16 17:05:01 -0700 | [diff] [blame] | 2510 | eoi_ioapic_irq(desc); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2511 | } |
| 2512 | |
| 2513 | static void ack_x2apic_edge(unsigned int irq) |
| 2514 | { |
| 2515 | ack_x2APIC_irq(); |
| 2516 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2517 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2518 | #endif |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2519 | |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2520 | static void ack_apic_edge(unsigned int irq) |
| 2521 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2522 | struct irq_desc *desc = irq_to_desc(irq); |
| 2523 | |
| 2524 | irq_complete_move(&desc); |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2525 | move_native_irq(irq); |
| 2526 | ack_APIC_irq(); |
| 2527 | } |
| 2528 | |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2529 | atomic_t irq_mis_count; |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2530 | |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2531 | static void ack_apic_level(unsigned int irq) |
| 2532 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2533 | struct irq_desc *desc = irq_to_desc(irq); |
| 2534 | |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2535 | #ifdef CONFIG_X86_32 |
| 2536 | unsigned long v; |
| 2537 | int i; |
| 2538 | #endif |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2539 | struct irq_cfg *cfg; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2540 | int do_unmask_irq = 0; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2541 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2542 | irq_complete_move(&desc); |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2543 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2544 | /* If we are moving the irq we need to mask it */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2545 | if (unlikely(desc->status & IRQ_MOVE_PENDING)) { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2546 | do_unmask_irq = 1; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2547 | mask_IO_APIC_irq_desc(desc); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2548 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2549 | #endif |
| 2550 | |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2551 | #ifdef CONFIG_X86_32 |
| 2552 | /* |
| 2553 | * It appears there is an erratum which affects at least version 0x11 |
| 2554 | * of I/O APIC (that's the 82093AA and cores integrated into various |
| 2555 | * chipsets). Under certain conditions a level-triggered interrupt is |
| 2556 | * erroneously delivered as edge-triggered one but the respective IRR |
| 2557 | * bit gets set nevertheless. As a result the I/O unit expects an EOI |
| 2558 | * message but it will never arrive and further interrupts are blocked |
| 2559 | * from the source. The exact reason is so far unknown, but the |
| 2560 | * phenomenon was observed when two consecutive interrupt requests |
| 2561 | * from a given source get delivered to the same CPU and the source is |
| 2562 | * temporarily disabled in between. |
| 2563 | * |
| 2564 | * A workaround is to simulate an EOI message manually. We achieve it |
| 2565 | * by setting the trigger mode to edge and then to level when the edge |
| 2566 | * trigger mode gets detected in the TMR of a local APIC for a |
| 2567 | * level-triggered interrupt. We mask the source for the time of the |
| 2568 | * operation to prevent an edge-triggered interrupt escaping meanwhile. |
| 2569 | * The idea is from Manfred Spraul. --macro |
| 2570 | */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2571 | cfg = desc->chip_data; |
| 2572 | i = cfg->vector; |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2573 | |
| 2574 | v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1)); |
| 2575 | #endif |
| 2576 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2577 | /* |
| 2578 | * We must acknowledge the irq before we move it or the acknowledge will |
| 2579 | * not propagate properly. |
| 2580 | */ |
| 2581 | ack_APIC_irq(); |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2582 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2583 | /* Now we can move and renable the irq */ |
| 2584 | if (unlikely(do_unmask_irq)) { |
| 2585 | /* Only migrate the irq if the ack has been received. |
| 2586 | * |
| 2587 | * On rare occasions the broadcast level triggered ack gets |
| 2588 | * delayed going to ioapics, and if we reprogram the |
| 2589 | * vector while Remote IRR is still set the irq will never |
| 2590 | * fire again. |
| 2591 | * |
| 2592 | * To prevent this scenario we read the Remote IRR bit |
| 2593 | * of the ioapic. This has two effects. |
| 2594 | * - On any sane system the read of the ioapic will |
| 2595 | * flush writes (and acks) going to the ioapic from |
| 2596 | * this cpu. |
| 2597 | * - We get to see if the ACK has actually been delivered. |
| 2598 | * |
| 2599 | * Based on failed experiments of reprogramming the |
| 2600 | * ioapic entry from outside of irq context starting |
| 2601 | * with masking the ioapic entry and then polling until |
| 2602 | * Remote IRR was clear before reprogramming the |
| 2603 | * ioapic I don't trust the Remote IRR bit to be |
| 2604 | * completey accurate. |
| 2605 | * |
| 2606 | * However there appears to be no other way to plug |
| 2607 | * this race, so if the Remote IRR bit is not |
| 2608 | * accurate and is causing problems then it is a hardware bug |
| 2609 | * and you can go talk to the chipset vendor about it. |
| 2610 | */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2611 | cfg = desc->chip_data; |
| 2612 | if (!io_apic_level_ack_pending(cfg)) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2613 | move_masked_irq(irq); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2614 | unmask_IO_APIC_irq_desc(desc); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2615 | } |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2616 | |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2617 | #ifdef CONFIG_X86_32 |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2618 | if (!(v & (1 << (i & 0x1f)))) { |
| 2619 | atomic_inc(&irq_mis_count); |
| 2620 | spin_lock(&ioapic_lock); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2621 | __mask_and_edge_IO_APIC_irq(cfg); |
| 2622 | __unmask_and_level_IO_APIC_irq(cfg); |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2623 | spin_unlock(&ioapic_lock); |
| 2624 | } |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2625 | #endif |
Yinghai Lu | 3eb2cce | 2008-08-19 20:50:48 -0700 | [diff] [blame] | 2626 | } |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2627 | |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 2628 | static struct irq_chip ioapic_chip __read_mostly = { |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 2629 | .name = "IO-APIC", |
| 2630 | .startup = startup_ioapic_irq, |
| 2631 | .mask = mask_IO_APIC_irq, |
| 2632 | .unmask = unmask_IO_APIC_irq, |
| 2633 | .ack = ack_apic_edge, |
| 2634 | .eoi = ack_apic_level, |
Ashok Raj | 54d5d42 | 2005-09-06 15:16:15 -0700 | [diff] [blame] | 2635 | #ifdef CONFIG_SMP |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 2636 | .set_affinity = set_ioapic_affinity_irq, |
Ashok Raj | 54d5d42 | 2005-09-06 15:16:15 -0700 | [diff] [blame] | 2637 | #endif |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 2638 | .retrigger = ioapic_retrigger_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | }; |
| 2640 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2641 | #ifdef CONFIG_INTR_REMAP |
| 2642 | static struct irq_chip ir_ioapic_chip __read_mostly = { |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 2643 | .name = "IR-IO-APIC", |
| 2644 | .startup = startup_ioapic_irq, |
| 2645 | .mask = mask_IO_APIC_irq, |
| 2646 | .unmask = unmask_IO_APIC_irq, |
| 2647 | .ack = ack_x2apic_edge, |
| 2648 | .eoi = ack_x2apic_level, |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2649 | #ifdef CONFIG_SMP |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 2650 | .set_affinity = set_ir_ioapic_affinity_irq, |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2651 | #endif |
| 2652 | .retrigger = ioapic_retrigger_irq, |
| 2653 | }; |
| 2654 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2655 | |
| 2656 | static inline void init_IO_APIC_traps(void) |
| 2657 | { |
| 2658 | int irq; |
Yinghai Lu | 08678b0 | 2008-08-19 20:50:05 -0700 | [diff] [blame] | 2659 | struct irq_desc *desc; |
Yinghai Lu | da51a82 | 2008-08-19 20:50:25 -0700 | [diff] [blame] | 2660 | struct irq_cfg *cfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2661 | |
| 2662 | /* |
| 2663 | * NOTE! The local APIC isn't very good at handling |
| 2664 | * multiple interrupts at the same interrupt level. |
| 2665 | * As the interrupt level is determined by taking the |
| 2666 | * vector number and shifting that right by 4, we |
| 2667 | * want to spread these out a bit so that they don't |
| 2668 | * all fall in the same interrupt level. |
| 2669 | * |
| 2670 | * Also, we've got to be careful not to trash gate |
| 2671 | * 0x80, because int 0x80 is hm, kind of importantish. ;) |
| 2672 | */ |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 2673 | for_each_irq_desc(irq, desc) { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 2674 | cfg = desc->chip_data; |
| 2675 | if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | /* |
| 2677 | * Hmm.. We don't have an entry for this, |
| 2678 | * so default to an old-fashioned 8259 |
| 2679 | * interrupt if we can.. |
| 2680 | */ |
Yinghai Lu | 99d093d | 2008-12-05 18:58:32 -0800 | [diff] [blame] | 2681 | if (irq < NR_IRQS_LEGACY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | make_8259A_irq(irq); |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 2683 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | /* Strange. Oh, well.. */ |
Yinghai Lu | 08678b0 | 2008-08-19 20:50:05 -0700 | [diff] [blame] | 2685 | desc->chip = &no_irq_chip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | } |
| 2687 | } |
| 2688 | } |
| 2689 | |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 2690 | /* |
| 2691 | * The local APIC irq-chip implementation: |
| 2692 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 2694 | static void mask_lapic_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2695 | { |
| 2696 | unsigned long v; |
| 2697 | |
| 2698 | v = apic_read(APIC_LVT0); |
Maciej W. Rozycki | 593f4a7 | 2008-07-16 19:15:30 +0100 | [diff] [blame] | 2699 | apic_write(APIC_LVT0, v | APIC_LVT_MASKED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | } |
| 2701 | |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 2702 | static void unmask_lapic_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | { |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 2704 | unsigned long v; |
| 2705 | |
| 2706 | v = apic_read(APIC_LVT0); |
Maciej W. Rozycki | 593f4a7 | 2008-07-16 19:15:30 +0100 | [diff] [blame] | 2707 | apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2708 | } |
| 2709 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2710 | static void ack_lapic_irq(unsigned int irq) |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 2711 | { |
| 2712 | ack_APIC_irq(); |
| 2713 | } |
| 2714 | |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 2715 | static struct irq_chip lapic_chip __read_mostly = { |
Maciej W. Rozycki | 9a1c619 | 2008-05-27 21:19:09 +0100 | [diff] [blame] | 2716 | .name = "local-APIC", |
Ingo Molnar | f5b9ed7 | 2006-10-04 02:16:26 -0700 | [diff] [blame] | 2717 | .mask = mask_lapic_irq, |
| 2718 | .unmask = unmask_lapic_irq, |
Maciej W. Rozycki | c88ac1d | 2008-07-11 19:35:17 +0100 | [diff] [blame] | 2719 | .ack = ack_lapic_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | }; |
| 2721 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2722 | static void lapic_register_intr(int irq, struct irq_desc *desc) |
Maciej W. Rozycki | c88ac1d | 2008-07-11 19:35:17 +0100 | [diff] [blame] | 2723 | { |
Yinghai Lu | 08678b0 | 2008-08-19 20:50:05 -0700 | [diff] [blame] | 2724 | desc->status &= ~IRQ_LEVEL; |
Maciej W. Rozycki | c88ac1d | 2008-07-11 19:35:17 +0100 | [diff] [blame] | 2725 | set_irq_chip_and_handler_name(irq, &lapic_chip, handle_edge_irq, |
| 2726 | "edge"); |
Maciej W. Rozycki | c88ac1d | 2008-07-11 19:35:17 +0100 | [diff] [blame] | 2727 | } |
| 2728 | |
Jan Beulich | e942710 | 2008-01-30 13:31:24 +0100 | [diff] [blame] | 2729 | static void __init setup_nmi(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2730 | { |
| 2731 | /* |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 2732 | * Dirty trick to enable the NMI watchdog ... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | * We put the 8259A master into AEOI mode and |
| 2734 | * unmask on all local APICs LVT0 as NMI. |
| 2735 | * |
| 2736 | * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire') |
| 2737 | * is from Maciej W. Rozycki - so we do not have to EOI from |
| 2738 | * the NMI handler or the timer interrupt. |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 2739 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ..."); |
| 2741 | |
Jan Beulich | e942710 | 2008-01-30 13:31:24 +0100 | [diff] [blame] | 2742 | enable_NMI_through_LVT0(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2743 | |
| 2744 | apic_printk(APIC_VERBOSE, " done.\n"); |
| 2745 | } |
| 2746 | |
| 2747 | /* |
| 2748 | * This looks a bit hackish but it's about the only one way of sending |
| 2749 | * a few INTA cycles to 8259As and any associated glue logic. ICR does |
| 2750 | * not support the ExtINT mode, unfortunately. We need to send these |
| 2751 | * cycles as some i82489DX-based boards have glue logic that keeps the |
| 2752 | * 8259A interrupt line asserted until INTA. --macro |
| 2753 | */ |
Jacek Luczak | 28acf28 | 2008-04-12 17:41:12 +0200 | [diff] [blame] | 2754 | static inline void __init unlock_ExtINT_logic(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | { |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2756 | int apic, pin, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | struct IO_APIC_route_entry entry0, entry1; |
| 2758 | unsigned char save_control, save_freq_select; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2760 | pin = find_isa_irq_pin(8, mp_INT); |
Adrian Bunk | 956fb53 | 2006-12-07 02:14:11 +0100 | [diff] [blame] | 2761 | if (pin == -1) { |
| 2762 | WARN_ON_ONCE(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | return; |
Adrian Bunk | 956fb53 | 2006-12-07 02:14:11 +0100 | [diff] [blame] | 2764 | } |
| 2765 | apic = find_isa_irq_apic(8, mp_INT); |
| 2766 | if (apic == -1) { |
| 2767 | WARN_ON_ONCE(1); |
| 2768 | return; |
| 2769 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 2771 | entry0 = ioapic_read_entry(apic, pin); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2772 | clear_IO_APIC_pin(apic, pin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | |
| 2774 | memset(&entry1, 0, sizeof(entry1)); |
| 2775 | |
| 2776 | entry1.dest_mode = 0; /* physical delivery */ |
| 2777 | entry1.mask = 0; /* unmask IRQ now */ |
Yinghai Lu | d83e94a | 2008-08-19 20:50:33 -0700 | [diff] [blame] | 2778 | entry1.dest = hard_smp_processor_id(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | entry1.delivery_mode = dest_ExtINT; |
| 2780 | entry1.polarity = entry0.polarity; |
| 2781 | entry1.trigger = 0; |
| 2782 | entry1.vector = 0; |
| 2783 | |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 2784 | ioapic_write_entry(apic, pin, entry1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | |
| 2786 | save_control = CMOS_READ(RTC_CONTROL); |
| 2787 | save_freq_select = CMOS_READ(RTC_FREQ_SELECT); |
| 2788 | CMOS_WRITE((save_freq_select & ~RTC_RATE_SELECT) | 0x6, |
| 2789 | RTC_FREQ_SELECT); |
| 2790 | CMOS_WRITE(save_control | RTC_PIE, RTC_CONTROL); |
| 2791 | |
| 2792 | i = 100; |
| 2793 | while (i-- > 0) { |
| 2794 | mdelay(10); |
| 2795 | if ((CMOS_READ(RTC_INTR_FLAGS) & RTC_PF) == RTC_PF) |
| 2796 | i -= 10; |
| 2797 | } |
| 2798 | |
| 2799 | CMOS_WRITE(save_control, RTC_CONTROL); |
| 2800 | CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2801 | clear_IO_APIC_pin(apic, pin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 2803 | ioapic_write_entry(apic, pin, entry0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2804 | } |
| 2805 | |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 2806 | static int disable_timer_pin_1 __initdata; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2807 | /* Actually the next is obsolete, but keep it for paranoid reasons -AK */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2808 | static int __init disable_timer_pin_setup(char *arg) |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 2809 | { |
| 2810 | disable_timer_pin_1 = 1; |
| 2811 | return 0; |
| 2812 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2813 | early_param("disable_timer_pin_1", disable_timer_pin_setup); |
Yinghai Lu | efa2559 | 2008-08-19 20:50:36 -0700 | [diff] [blame] | 2814 | |
| 2815 | int timer_through_8259 __initdata; |
| 2816 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | /* |
| 2818 | * This code may look a bit paranoid, but it's supposed to cooperate with |
| 2819 | * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ |
| 2820 | * is so screwy. Thanks to Brian Perkins for testing/hacking this beast |
| 2821 | * fanatically on his truly buggy board. |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2822 | * |
| 2823 | * FIXME: really need to revamp this for all platforms. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | */ |
Zachary Amsden | 8542b20 | 2006-12-07 02:14:09 +0100 | [diff] [blame] | 2825 | static inline void __init check_timer(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2827 | struct irq_desc *desc = irq_to_desc(0); |
| 2828 | struct irq_cfg *cfg = desc->chip_data; |
| 2829 | int cpu = boot_cpu_id; |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2830 | int apic1, pin1, apic2, pin2; |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2831 | unsigned long flags; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 2832 | int no_pin1 = 0; |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2833 | |
| 2834 | local_irq_save(flags); |
Maciej W. Rozycki | d4d25de | 2007-11-26 20:42:19 +0100 | [diff] [blame] | 2835 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2836 | /* |
| 2837 | * get/set the timer IRQ vector: |
| 2838 | */ |
| 2839 | disable_8259A_irq(0); |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 2840 | assign_irq_vector(0, cfg, apic->target_cpus()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | |
| 2842 | /* |
Maciej W. Rozycki | d11d579 | 2008-05-21 22:09:11 +0100 | [diff] [blame] | 2843 | * As IRQ0 is to be enabled in the 8259A, the virtual |
| 2844 | * wire has to be disabled in the local APIC. Also |
| 2845 | * timer interrupts need to be acknowledged manually in |
| 2846 | * the 8259A for the i82489DX when using the NMI |
| 2847 | * watchdog as that APIC treats NMIs as level-triggered. |
| 2848 | * The AEOI mode will finish them in the 8259A |
| 2849 | * automatically. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | */ |
Maciej W. Rozycki | 593f4a7 | 2008-07-16 19:15:30 +0100 | [diff] [blame] | 2851 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | init_8259A(1); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2853 | #ifdef CONFIG_X86_32 |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 2854 | { |
| 2855 | unsigned int ver; |
| 2856 | |
| 2857 | ver = apic_read(APIC_LVR); |
| 2858 | ver = GET_APIC_VERSION(ver); |
| 2859 | timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver)); |
| 2860 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2861 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2862 | |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2863 | pin1 = find_isa_irq_pin(0, mp_INT); |
| 2864 | apic1 = find_isa_irq_apic(0, mp_INT); |
| 2865 | pin2 = ioapic_i8259.pin; |
| 2866 | apic2 = ioapic_i8259.apic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2867 | |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2868 | apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X " |
| 2869 | "apic1=%d pin1=%d apic2=%d pin2=%d\n", |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2870 | cfg->vector, apic1, pin1, apic2, pin2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | |
Maciej W. Rozycki | 691874f | 2008-05-27 21:19:51 +0100 | [diff] [blame] | 2872 | /* |
| 2873 | * Some BIOS writers are clueless and report the ExtINTA |
| 2874 | * I/O APIC input from the cascaded 8259A as the timer |
| 2875 | * interrupt input. So just in case, if only one pin |
| 2876 | * was found above, try it both directly and through the |
| 2877 | * 8259A. |
| 2878 | */ |
| 2879 | if (pin1 == -1) { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2880 | if (intr_remapping_enabled) |
| 2881 | panic("BIOS bug: timer not connected to IO-APIC"); |
Maciej W. Rozycki | 691874f | 2008-05-27 21:19:51 +0100 | [diff] [blame] | 2882 | pin1 = pin2; |
| 2883 | apic1 = apic2; |
| 2884 | no_pin1 = 1; |
| 2885 | } else if (pin2 == -1) { |
| 2886 | pin2 = pin1; |
| 2887 | apic2 = apic1; |
| 2888 | } |
| 2889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2890 | if (pin1 != -1) { |
| 2891 | /* |
| 2892 | * Ok, does IRQ0 through the IOAPIC work? |
| 2893 | */ |
Maciej W. Rozycki | 691874f | 2008-05-27 21:19:51 +0100 | [diff] [blame] | 2894 | if (no_pin1) { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2895 | add_pin_to_irq_cpu(cfg, cpu, apic1, pin1); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2896 | setup_timer_IRQ0_pin(apic1, pin1, cfg->vector); |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 2897 | } else { |
| 2898 | /* for edge trigger, setup_IO_APIC_irq already |
| 2899 | * leave it unmasked. |
| 2900 | * so only need to unmask if it is level-trigger |
| 2901 | * do we really have level trigger timer? |
| 2902 | */ |
| 2903 | int idx; |
| 2904 | idx = find_irq_entry(apic1, pin1, mp_INT); |
| 2905 | if (idx != -1 && irq_trigger(idx)) |
| 2906 | unmask_IO_APIC_irq_desc(desc); |
Maciej W. Rozycki | 691874f | 2008-05-27 21:19:51 +0100 | [diff] [blame] | 2907 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | if (timer_irq_works()) { |
| 2909 | if (nmi_watchdog == NMI_IO_APIC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | setup_nmi(); |
| 2911 | enable_8259A_irq(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | } |
Chuck Ebbert | 66759a0 | 2005-09-12 18:49:25 +0200 | [diff] [blame] | 2913 | if (disable_timer_pin_1 > 0) |
| 2914 | clear_IO_APIC_pin(0, pin1); |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2915 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2916 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2917 | if (intr_remapping_enabled) |
| 2918 | panic("timer doesn't work through Interrupt-remapped IO-APIC"); |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 2919 | local_irq_disable(); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2920 | clear_IO_APIC_pin(apic1, pin1); |
Maciej W. Rozycki | 691874f | 2008-05-27 21:19:51 +0100 | [diff] [blame] | 2921 | if (!no_pin1) |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2922 | apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: " |
| 2923 | "8254 timer not connected to IO-APIC\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2924 | |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2925 | apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer " |
| 2926 | "(IRQ0) through the 8259A ...\n"); |
| 2927 | apic_printk(APIC_QUIET, KERN_INFO |
| 2928 | "..... (found apic %d pin %d) ...\n", apic2, pin2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2929 | /* |
| 2930 | * legacy devices should be connected to IO APIC #0 |
| 2931 | */ |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2932 | replace_pin_at_irq_cpu(cfg, cpu, apic1, pin1, apic2, pin2); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2933 | setup_timer_IRQ0_pin(apic2, pin2, cfg->vector); |
Maciej W. Rozycki | ecd2947 | 2008-05-21 22:09:19 +0100 | [diff] [blame] | 2934 | enable_8259A_irq(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | if (timer_irq_works()) { |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2936 | apic_printk(APIC_QUIET, KERN_INFO "....... works.\n"); |
Maciej W. Rozycki | 35542c5 | 2008-05-21 22:10:22 +0100 | [diff] [blame] | 2937 | timer_through_8259 = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2938 | if (nmi_watchdog == NMI_IO_APIC) { |
Maciej W. Rozycki | 60134eb | 2008-05-21 22:09:34 +0100 | [diff] [blame] | 2939 | disable_8259A_irq(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2940 | setup_nmi(); |
Maciej W. Rozycki | 60134eb | 2008-05-21 22:09:34 +0100 | [diff] [blame] | 2941 | enable_8259A_irq(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2942 | } |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2943 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2944 | } |
| 2945 | /* |
| 2946 | * Cleanup, just in case ... |
| 2947 | */ |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 2948 | local_irq_disable(); |
Maciej W. Rozycki | ecd2947 | 2008-05-21 22:09:19 +0100 | [diff] [blame] | 2949 | disable_8259A_irq(0); |
Eric W. Biederman | fcfd636 | 2005-10-30 14:59:39 -0800 | [diff] [blame] | 2950 | clear_IO_APIC_pin(apic2, pin2); |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2951 | apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | |
| 2954 | if (nmi_watchdog == NMI_IO_APIC) { |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2955 | apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work " |
| 2956 | "through the IO-APIC - disabling NMI Watchdog!\n"); |
Cyrill Gorcunov | 067fa0f | 2008-05-29 22:32:30 +0400 | [diff] [blame] | 2957 | nmi_watchdog = NMI_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2958 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2959 | #ifdef CONFIG_X86_32 |
Maciej W. Rozycki | d11d579 | 2008-05-21 22:09:11 +0100 | [diff] [blame] | 2960 | timer_ack = 0; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 2961 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2963 | apic_printk(APIC_QUIET, KERN_INFO |
| 2964 | "...trying to set up timer as Virtual Wire IRQ...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 2966 | lapic_register_intr(0, desc); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2967 | apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2968 | enable_8259A_irq(0); |
| 2969 | |
| 2970 | if (timer_irq_works()) { |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2971 | apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2972 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2973 | } |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 2974 | local_irq_disable(); |
Maciej W. Rozycki | e67465f | 2008-05-21 22:09:26 +0100 | [diff] [blame] | 2975 | disable_8259A_irq(0); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 2976 | apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector); |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2977 | apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2979 | apic_printk(APIC_QUIET, KERN_INFO |
| 2980 | "...trying to set up timer as ExtINT IRQ...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | init_8259A(0); |
| 2983 | make_8259A_irq(0); |
Maciej W. Rozycki | 593f4a7 | 2008-07-16 19:15:30 +0100 | [diff] [blame] | 2984 | apic_write(APIC_LVT0, APIC_DM_EXTINT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | |
| 2986 | unlock_ExtINT_logic(); |
| 2987 | |
| 2988 | if (timer_irq_works()) { |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2989 | apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2990 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | } |
Yinghai Lu | f72dcca | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 2992 | local_irq_disable(); |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2993 | apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a " |
Maciej W. Rozycki | 49a66a0b | 2008-07-14 19:08:13 +0100 | [diff] [blame] | 2995 | "report. Then try booting with the 'noapic' option.\n"); |
Ingo Molnar | 4aae070 | 2007-12-18 18:05:58 +0100 | [diff] [blame] | 2996 | out: |
| 2997 | local_irq_restore(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | } |
| 2999 | |
| 3000 | /* |
Maciej W. Rozycki | af17478 | 2008-07-11 19:35:23 +0100 | [diff] [blame] | 3001 | * Traditionally ISA IRQ2 is the cascade IRQ, and is not available |
| 3002 | * to devices. However there may be an I/O APIC pin available for |
| 3003 | * this interrupt regardless. The pin may be left unconnected, but |
| 3004 | * typically it will be reused as an ExtINT cascade interrupt for |
| 3005 | * the master 8259A. In the MPS case such a pin will normally be |
| 3006 | * reported as an ExtINT interrupt in the MP table. With ACPI |
| 3007 | * there is no provision for ExtINT interrupts, and in the absence |
| 3008 | * of an override it would be treated as an ordinary ISA I/O APIC |
| 3009 | * interrupt, that is edge-triggered and unmasked by default. We |
| 3010 | * used to do this, but it caused problems on some systems because |
| 3011 | * of the NMI watchdog and sometimes IRQ0 of the 8254 timer using |
| 3012 | * the same ExtINT cascade interrupt to drive the local APIC of the |
| 3013 | * bootstrap processor. Therefore we refrain from routing IRQ2 to |
| 3014 | * the I/O APIC in all cases now. No actual device should request |
| 3015 | * it anyway. --macro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3016 | */ |
| 3017 | #define PIC_IRQS (1 << PIC_CASCADE_IR) |
| 3018 | |
| 3019 | void __init setup_IO_APIC(void) |
| 3020 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3021 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3022 | /* |
| 3023 | * calling enable_IO_APIC() is moved to setup_local_APIC for BP |
| 3024 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | |
Maciej W. Rozycki | af17478 | 2008-07-11 19:35:23 +0100 | [diff] [blame] | 3026 | io_apic_irqs = ~PIC_IRQS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3028 | apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n"); |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 3029 | /* |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3030 | * Set up IO-APIC IRQ routing. |
| 3031 | */ |
| 3032 | #ifdef CONFIG_X86_32 |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 3033 | if (!acpi_ioapic) |
| 3034 | setup_ioapic_ids_from_mpc(); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3035 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | sync_Arb_IDs(); |
| 3037 | setup_IO_APIC_irqs(); |
| 3038 | init_IO_APIC_traps(); |
Linus Torvalds | 1e4c85f | 2005-10-31 19:16:17 -0800 | [diff] [blame] | 3039 | check_timer(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | } |
| 3041 | |
| 3042 | /* |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3043 | * Called after all the initialization is done. If we didnt find any |
| 3044 | * APIC bugs then we can allow the modify fast path |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | */ |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | static int __init io_apic_bug_finalize(void) |
| 3048 | { |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 3049 | if (sis_apic_bug == -1) |
| 3050 | sis_apic_bug = 0; |
| 3051 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3052 | } |
| 3053 | |
| 3054 | late_initcall(io_apic_bug_finalize); |
| 3055 | |
| 3056 | struct sysfs_ioapic_data { |
| 3057 | struct sys_device dev; |
| 3058 | struct IO_APIC_route_entry entry[0]; |
| 3059 | }; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3060 | static struct sysfs_ioapic_data * mp_ioapic_data[MAX_IO_APICS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | |
Pavel Machek | 438510f | 2005-04-16 15:25:24 -0700 | [diff] [blame] | 3062 | static int ioapic_suspend(struct sys_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3063 | { |
| 3064 | struct IO_APIC_route_entry *entry; |
| 3065 | struct sysfs_ioapic_data *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3066 | int i; |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3067 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3068 | data = container_of(dev, struct sysfs_ioapic_data, dev); |
| 3069 | entry = data->entry; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3070 | for (i = 0; i < nr_ioapic_registers[dev->id]; i ++, entry ++ ) |
| 3071 | *entry = ioapic_read_entry(dev->id, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | |
| 3073 | return 0; |
| 3074 | } |
| 3075 | |
| 3076 | static int ioapic_resume(struct sys_device *dev) |
| 3077 | { |
| 3078 | struct IO_APIC_route_entry *entry; |
| 3079 | struct sysfs_ioapic_data *data; |
| 3080 | unsigned long flags; |
| 3081 | union IO_APIC_reg_00 reg_00; |
| 3082 | int i; |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3084 | data = container_of(dev, struct sysfs_ioapic_data, dev); |
| 3085 | entry = data->entry; |
| 3086 | |
| 3087 | spin_lock_irqsave(&ioapic_lock, flags); |
| 3088 | reg_00.raw = io_apic_read(dev->id, 0); |
Jaswinder Singh Rajput | b5ba7e6 | 2009-01-12 17:46:17 +0530 | [diff] [blame] | 3089 | if (reg_00.bits.ID != mp_ioapics[dev->id].apicid) { |
| 3090 | reg_00.bits.ID = mp_ioapics[dev->id].apicid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | io_apic_write(dev->id, 0, reg_00.raw); |
| 3092 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | spin_unlock_irqrestore(&ioapic_lock, flags); |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3094 | for (i = 0; i < nr_ioapic_registers[dev->id]; i++) |
Andi Kleen | cf4c6a2 | 2006-09-26 10:52:30 +0200 | [diff] [blame] | 3095 | ioapic_write_entry(dev->id, i, entry[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3096 | |
| 3097 | return 0; |
| 3098 | } |
| 3099 | |
| 3100 | static struct sysdev_class ioapic_sysdev_class = { |
Kay Sievers | af5ca3f | 2007-12-20 02:09:39 +0100 | [diff] [blame] | 3101 | .name = "ioapic", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3102 | .suspend = ioapic_suspend, |
| 3103 | .resume = ioapic_resume, |
| 3104 | }; |
| 3105 | |
| 3106 | static int __init ioapic_init_sysfs(void) |
| 3107 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3108 | struct sys_device * dev; |
| 3109 | int i, size, error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3110 | |
| 3111 | error = sysdev_class_register(&ioapic_sysdev_class); |
| 3112 | if (error) |
| 3113 | return error; |
| 3114 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3115 | for (i = 0; i < nr_ioapics; i++ ) { |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3116 | size = sizeof(struct sys_device) + nr_ioapic_registers[i] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3117 | * sizeof(struct IO_APIC_route_entry); |
Christophe Jaillet | 25556c1 | 2008-06-22 22:13:48 +0200 | [diff] [blame] | 3118 | mp_ioapic_data[i] = kzalloc(size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | if (!mp_ioapic_data[i]) { |
| 3120 | printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i); |
| 3121 | continue; |
| 3122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3123 | dev = &mp_ioapic_data[i]->dev; |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3124 | dev->id = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3125 | dev->cls = &ioapic_sysdev_class; |
| 3126 | error = sysdev_register(dev); |
| 3127 | if (error) { |
| 3128 | kfree(mp_ioapic_data[i]); |
| 3129 | mp_ioapic_data[i] = NULL; |
| 3130 | printk(KERN_ERR "Can't suspend/resume IOAPIC %d\n", i); |
| 3131 | continue; |
| 3132 | } |
| 3133 | } |
| 3134 | |
| 3135 | return 0; |
| 3136 | } |
| 3137 | |
| 3138 | device_initcall(ioapic_init_sysfs); |
| 3139 | |
Yinghai Lu | abcaa2b | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3140 | static int nr_irqs_gsi = NR_IRQS_LEGACY; |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3141 | /* |
Eric W. Biederman | 95d7788 | 2006-10-04 02:17:01 -0700 | [diff] [blame] | 3142 | * Dynamic irq allocate and deallocation |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3143 | */ |
Yinghai Lu | 199751d | 2008-08-19 20:50:27 -0700 | [diff] [blame] | 3144 | unsigned int create_irq_nr(unsigned int irq_want) |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3145 | { |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 3146 | /* Allocate an unused irq */ |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3147 | unsigned int irq; |
| 3148 | unsigned int new; |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3149 | unsigned long flags; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3150 | struct irq_cfg *cfg_new = NULL; |
| 3151 | int cpu = boot_cpu_id; |
| 3152 | struct irq_desc *desc_new = NULL; |
Yinghai Lu | 199751d | 2008-08-19 20:50:27 -0700 | [diff] [blame] | 3153 | |
| 3154 | irq = 0; |
Yinghai Lu | abcaa2b | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3155 | if (irq_want < nr_irqs_gsi) |
| 3156 | irq_want = nr_irqs_gsi; |
| 3157 | |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 3158 | spin_lock_irqsave(&vector_lock, flags); |
Mike Travis | 9594949 | 2009-01-10 22:24:06 -0800 | [diff] [blame] | 3159 | for (new = irq_want; new < nr_irqs; new++) { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3160 | desc_new = irq_to_desc_alloc_cpu(new, cpu); |
| 3161 | if (!desc_new) { |
| 3162 | printk(KERN_INFO "can not get irq_desc for %d\n", new); |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 3163 | continue; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3164 | } |
| 3165 | cfg_new = desc_new->chip_data; |
| 3166 | |
| 3167 | if (cfg_new->vector != 0) |
| 3168 | continue; |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 3169 | if (__assign_irq_vector(new, cfg_new, apic->target_cpus()) == 0) |
Eric W. Biederman | ace80ab | 2006-10-04 02:16:47 -0700 | [diff] [blame] | 3170 | irq = new; |
| 3171 | break; |
| 3172 | } |
| 3173 | spin_unlock_irqrestore(&vector_lock, flags); |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3174 | |
Yinghai Lu | 199751d | 2008-08-19 20:50:27 -0700 | [diff] [blame] | 3175 | if (irq > 0) { |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3176 | dynamic_irq_init(irq); |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3177 | /* restore it, in case dynamic_irq_init clear it */ |
| 3178 | if (desc_new) |
| 3179 | desc_new->chip_data = cfg_new; |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3180 | } |
| 3181 | return irq; |
| 3182 | } |
| 3183 | |
Yinghai Lu | 199751d | 2008-08-19 20:50:27 -0700 | [diff] [blame] | 3184 | int create_irq(void) |
| 3185 | { |
Yinghai Lu | be5d535 | 2008-12-05 18:58:33 -0800 | [diff] [blame] | 3186 | unsigned int irq_want; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3187 | int irq; |
| 3188 | |
Yinghai Lu | be5d535 | 2008-12-05 18:58:33 -0800 | [diff] [blame] | 3189 | irq_want = nr_irqs_gsi; |
| 3190 | irq = create_irq_nr(irq_want); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3191 | |
| 3192 | if (irq == 0) |
| 3193 | irq = -1; |
| 3194 | |
| 3195 | return irq; |
Yinghai Lu | 199751d | 2008-08-19 20:50:27 -0700 | [diff] [blame] | 3196 | } |
| 3197 | |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3198 | void destroy_irq(unsigned int irq) |
| 3199 | { |
| 3200 | unsigned long flags; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3201 | struct irq_cfg *cfg; |
| 3202 | struct irq_desc *desc; |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3203 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3204 | /* store it, in case dynamic_irq_cleanup clear it */ |
| 3205 | desc = irq_to_desc(irq); |
| 3206 | cfg = desc->chip_data; |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3207 | dynamic_irq_cleanup(irq); |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3208 | /* connect back irq_cfg */ |
| 3209 | if (desc) |
| 3210 | desc->chip_data = cfg; |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3211 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3212 | free_irte(irq); |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3213 | spin_lock_irqsave(&vector_lock, flags); |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3214 | __clear_irq_vector(irq, cfg); |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3215 | spin_unlock_irqrestore(&vector_lock, flags); |
| 3216 | } |
Eric W. Biederman | 3fc471e | 2006-10-04 02:16:39 -0700 | [diff] [blame] | 3217 | |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3218 | /* |
Simon Arlott | 27b46d7 | 2007-10-20 01:13:56 +0200 | [diff] [blame] | 3219 | * MSI message composition |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3220 | */ |
| 3221 | #ifdef CONFIG_PCI_MSI |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3222 | static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3223 | { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3224 | struct irq_cfg *cfg; |
| 3225 | int err; |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3226 | unsigned dest; |
| 3227 | |
Jan Beulich | f118263 | 2009-01-14 12:27:35 +0000 | [diff] [blame] | 3228 | if (disable_apic) |
| 3229 | return -ENXIO; |
| 3230 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3231 | cfg = irq_cfg(irq); |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 3232 | err = assign_irq_vector(irq, cfg, apic->target_cpus()); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3233 | if (err) |
| 3234 | return err; |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3235 | |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 3236 | dest = apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus()); |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3237 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3238 | if (irq_remapped(irq)) { |
| 3239 | struct irte irte; |
| 3240 | int ir_index; |
| 3241 | u16 sub_handle; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3242 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3243 | ir_index = map_irq_to_irte_handle(irq, &sub_handle); |
| 3244 | BUG_ON(ir_index == -1); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3245 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3246 | memset (&irte, 0, sizeof(irte)); |
| 3247 | |
| 3248 | irte.present = 1; |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3249 | irte.dst_mode = apic->irq_dest_mode; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3250 | irte.trigger_mode = 0; /* edge */ |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3251 | irte.dlvry_mode = apic->irq_delivery_mode; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3252 | irte.vector = cfg->vector; |
| 3253 | irte.dest_id = IRTE_DEST(dest); |
| 3254 | |
| 3255 | modify_irte(irq, &irte); |
| 3256 | |
| 3257 | msg->address_hi = MSI_ADDR_BASE_HI; |
| 3258 | msg->data = sub_handle; |
| 3259 | msg->address_lo = MSI_ADDR_BASE_LO | MSI_ADDR_IR_EXT_INT | |
| 3260 | MSI_ADDR_IR_SHV | |
| 3261 | MSI_ADDR_IR_INDEX1(ir_index) | |
| 3262 | MSI_ADDR_IR_INDEX2(ir_index); |
Suresh Siddha | 29b61be | 2009-03-16 17:05:02 -0700 | [diff] [blame^] | 3263 | } else { |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 3264 | if (x2apic_enabled()) |
| 3265 | msg->address_hi = MSI_ADDR_BASE_HI | |
| 3266 | MSI_ADDR_EXT_DEST_ID(dest); |
| 3267 | else |
| 3268 | msg->address_hi = MSI_ADDR_BASE_HI; |
| 3269 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3270 | msg->address_lo = |
| 3271 | MSI_ADDR_BASE_LO | |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3272 | ((apic->irq_dest_mode == 0) ? |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3273 | MSI_ADDR_DEST_MODE_PHYSICAL: |
| 3274 | MSI_ADDR_DEST_MODE_LOGICAL) | |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3275 | ((apic->irq_delivery_mode != dest_LowestPrio) ? |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3276 | MSI_ADDR_REDIRECTION_CPU: |
| 3277 | MSI_ADDR_REDIRECTION_LOWPRI) | |
| 3278 | MSI_ADDR_DEST_ID(dest); |
| 3279 | |
| 3280 | msg->data = |
| 3281 | MSI_DATA_TRIGGER_EDGE | |
| 3282 | MSI_DATA_LEVEL_ASSERT | |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3283 | ((apic->irq_delivery_mode != dest_LowestPrio) ? |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3284 | MSI_DATA_DELIVERY_FIXED: |
| 3285 | MSI_DATA_DELIVERY_LOWPRI) | |
| 3286 | MSI_DATA_VECTOR(cfg->vector); |
| 3287 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3288 | return err; |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3289 | } |
| 3290 | |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3291 | #ifdef CONFIG_SMP |
Rusty Russell | 0de2652 | 2008-12-13 21:20:26 +1030 | [diff] [blame] | 3292 | static void set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask) |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3293 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3294 | struct irq_desc *desc = irq_to_desc(irq); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3295 | struct irq_cfg *cfg; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3296 | struct msi_msg msg; |
| 3297 | unsigned int dest; |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3298 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3299 | dest = set_desc_affinity(desc, mask); |
| 3300 | if (dest == BAD_APICID) |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3301 | return; |
| 3302 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3303 | cfg = desc->chip_data; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3304 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3305 | read_msi_msg_desc(desc, &msg); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3306 | |
| 3307 | msg.data &= ~MSI_DATA_VECTOR_MASK; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3308 | msg.data |= MSI_DATA_VECTOR(cfg->vector); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3309 | msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; |
| 3310 | msg.address_lo |= MSI_ADDR_DEST_ID(dest); |
| 3311 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3312 | write_msi_msg_desc(desc, &msg); |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3313 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3314 | #ifdef CONFIG_INTR_REMAP |
| 3315 | /* |
| 3316 | * Migrate the MSI irq to another cpumask. This migration is |
| 3317 | * done in the process context using interrupt-remapping hardware. |
| 3318 | */ |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 3319 | static void |
| 3320 | ir_set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3321 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3322 | struct irq_desc *desc = irq_to_desc(irq); |
Ingo Molnar | a7883de | 2008-12-19 00:59:09 +0100 | [diff] [blame] | 3323 | struct irq_cfg *cfg = desc->chip_data; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3324 | unsigned int dest; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3325 | struct irte irte; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3326 | |
| 3327 | if (get_irte(irq, &irte)) |
| 3328 | return; |
| 3329 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3330 | dest = set_desc_affinity(desc, mask); |
| 3331 | if (dest == BAD_APICID) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3332 | return; |
| 3333 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3334 | irte.vector = cfg->vector; |
| 3335 | irte.dest_id = IRTE_DEST(dest); |
| 3336 | |
| 3337 | /* |
| 3338 | * atomically update the IRTE with the new destination and vector. |
| 3339 | */ |
| 3340 | modify_irte(irq, &irte); |
| 3341 | |
| 3342 | /* |
| 3343 | * After this point, all the interrupts will start arriving |
| 3344 | * at the new destination. So, time to cleanup the previous |
| 3345 | * vector allocation. |
| 3346 | */ |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3347 | if (cfg->move_in_progress) |
| 3348 | send_cleanup_vector(cfg); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3349 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3350 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3351 | #endif |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3352 | #endif /* CONFIG_SMP */ |
| 3353 | |
| 3354 | /* |
| 3355 | * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, |
| 3356 | * which implement the MSI or MSI-X Capability Structure. |
| 3357 | */ |
| 3358 | static struct irq_chip msi_chip = { |
| 3359 | .name = "PCI-MSI", |
| 3360 | .unmask = unmask_msi_irq, |
| 3361 | .mask = mask_msi_irq, |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3362 | .ack = ack_apic_edge, |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3363 | #ifdef CONFIG_SMP |
| 3364 | .set_affinity = set_msi_irq_affinity, |
| 3365 | #endif |
| 3366 | .retrigger = ioapic_retrigger_irq, |
| 3367 | }; |
| 3368 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3369 | #ifdef CONFIG_INTR_REMAP |
| 3370 | static struct irq_chip msi_ir_chip = { |
| 3371 | .name = "IR-PCI-MSI", |
| 3372 | .unmask = unmask_msi_irq, |
| 3373 | .mask = mask_msi_irq, |
| 3374 | .ack = ack_x2apic_edge, |
| 3375 | #ifdef CONFIG_SMP |
| 3376 | .set_affinity = ir_set_msi_irq_affinity, |
| 3377 | #endif |
| 3378 | .retrigger = ioapic_retrigger_irq, |
| 3379 | }; |
Suresh Siddha | 29b61be | 2009-03-16 17:05:02 -0700 | [diff] [blame^] | 3380 | #endif |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3381 | |
| 3382 | /* |
| 3383 | * Map the PCI dev to the corresponding remapping hardware unit |
| 3384 | * and allocate 'nvec' consecutive interrupt-remapping table entries |
| 3385 | * in it. |
| 3386 | */ |
| 3387 | static int msi_alloc_irte(struct pci_dev *dev, int irq, int nvec) |
| 3388 | { |
| 3389 | struct intel_iommu *iommu; |
| 3390 | int index; |
| 3391 | |
| 3392 | iommu = map_dev_to_ir(dev); |
| 3393 | if (!iommu) { |
| 3394 | printk(KERN_ERR |
| 3395 | "Unable to map PCI %s to iommu\n", pci_name(dev)); |
| 3396 | return -ENOENT; |
| 3397 | } |
| 3398 | |
| 3399 | index = alloc_irte(iommu, irq, nvec); |
| 3400 | if (index < 0) { |
| 3401 | printk(KERN_ERR |
| 3402 | "Unable to allocate %d IRTE for PCI %s\n", nvec, |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 3403 | pci_name(dev)); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3404 | return -ENOSPC; |
| 3405 | } |
| 3406 | return index; |
| 3407 | } |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3408 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3409 | static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq) |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3410 | { |
| 3411 | int ret; |
| 3412 | struct msi_msg msg; |
| 3413 | |
| 3414 | ret = msi_compose_msg(dev, irq, &msg); |
| 3415 | if (ret < 0) |
| 3416 | return ret; |
| 3417 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3418 | set_irq_msi(irq, msidesc); |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3419 | write_msi_msg(irq, &msg); |
| 3420 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3421 | if (irq_remapped(irq)) { |
| 3422 | struct irq_desc *desc = irq_to_desc(irq); |
| 3423 | /* |
| 3424 | * irq migration in process context |
| 3425 | */ |
| 3426 | desc->status |= IRQ_MOVE_PCNTXT; |
| 3427 | set_irq_chip_and_handler_name(irq, &msi_ir_chip, handle_edge_irq, "edge"); |
| 3428 | } else |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3429 | set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge"); |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3430 | |
Yinghai Lu | c81bba4 | 2008-09-25 11:53:11 -0700 | [diff] [blame] | 3431 | dev_printk(KERN_DEBUG, &dev->dev, "irq %d for MSI/MSI-X\n", irq); |
| 3432 | |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3433 | return 0; |
| 3434 | } |
| 3435 | |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 3436 | int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) |
| 3437 | { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3438 | unsigned int irq; |
| 3439 | int ret, sub_handle; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3440 | struct msi_desc *msidesc; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3441 | unsigned int irq_want; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3442 | struct intel_iommu *iommu = 0; |
| 3443 | int index = 0; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3444 | |
Yinghai Lu | be5d535 | 2008-12-05 18:58:33 -0800 | [diff] [blame] | 3445 | irq_want = nr_irqs_gsi; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3446 | sub_handle = 0; |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3447 | list_for_each_entry(msidesc, &dev->msi_list, list) { |
| 3448 | irq = create_irq_nr(irq_want); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3449 | if (irq == 0) |
| 3450 | return -1; |
Yinghai Lu | f1ee554 | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3451 | irq_want = irq + 1; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3452 | if (!intr_remapping_enabled) |
| 3453 | goto no_ir; |
| 3454 | |
| 3455 | if (!sub_handle) { |
| 3456 | /* |
| 3457 | * allocate the consecutive block of IRTE's |
| 3458 | * for 'nvec' |
| 3459 | */ |
| 3460 | index = msi_alloc_irte(dev, irq, nvec); |
| 3461 | if (index < 0) { |
| 3462 | ret = index; |
| 3463 | goto error; |
| 3464 | } |
| 3465 | } else { |
| 3466 | iommu = map_dev_to_ir(dev); |
| 3467 | if (!iommu) { |
| 3468 | ret = -ENOENT; |
| 3469 | goto error; |
| 3470 | } |
| 3471 | /* |
| 3472 | * setup the mapping between the irq and the IRTE |
| 3473 | * base index, the sub_handle pointing to the |
| 3474 | * appropriate interrupt remap table entry. |
| 3475 | */ |
| 3476 | set_irte_irq(irq, iommu, index, sub_handle); |
| 3477 | } |
| 3478 | no_ir: |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3479 | ret = setup_msi_irq(dev, msidesc, irq); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3480 | if (ret < 0) |
| 3481 | goto error; |
| 3482 | sub_handle++; |
| 3483 | } |
| 3484 | return 0; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 3485 | |
| 3486 | error: |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3487 | destroy_irq(irq); |
| 3488 | return ret; |
Yinghai Lu | 047c8fd | 2008-08-19 20:50:41 -0700 | [diff] [blame] | 3489 | } |
| 3490 | |
Eric W. Biederman | 3b7d192 | 2006-10-04 02:16:59 -0700 | [diff] [blame] | 3491 | void arch_teardown_msi_irq(unsigned int irq) |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3492 | { |
Eric W. Biederman | f7feaca | 2007-01-28 12:56:37 -0700 | [diff] [blame] | 3493 | destroy_irq(irq); |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3494 | } |
| 3495 | |
Suresh Siddha | 9d783ba | 2009-03-16 17:04:55 -0700 | [diff] [blame] | 3496 | #if defined (CONFIG_DMAR) || defined (CONFIG_INTR_REMAP) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3497 | #ifdef CONFIG_SMP |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3498 | static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3499 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3500 | struct irq_desc *desc = irq_to_desc(irq); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3501 | struct irq_cfg *cfg; |
| 3502 | struct msi_msg msg; |
| 3503 | unsigned int dest; |
Eric W. Biederman | 2d3fcc1 | 2006-10-04 02:16:43 -0700 | [diff] [blame] | 3504 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3505 | dest = set_desc_affinity(desc, mask); |
| 3506 | if (dest == BAD_APICID) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3507 | return; |
| 3508 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3509 | cfg = desc->chip_data; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3510 | |
| 3511 | dmar_msi_read(irq, &msg); |
| 3512 | |
| 3513 | msg.data &= ~MSI_DATA_VECTOR_MASK; |
| 3514 | msg.data |= MSI_DATA_VECTOR(cfg->vector); |
| 3515 | msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; |
| 3516 | msg.address_lo |= MSI_ADDR_DEST_ID(dest); |
| 3517 | |
| 3518 | dmar_msi_write(irq, &msg); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3519 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3520 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3521 | #endif /* CONFIG_SMP */ |
| 3522 | |
| 3523 | struct irq_chip dmar_msi_type = { |
| 3524 | .name = "DMAR_MSI", |
| 3525 | .unmask = dmar_msi_unmask, |
| 3526 | .mask = dmar_msi_mask, |
| 3527 | .ack = ack_apic_edge, |
| 3528 | #ifdef CONFIG_SMP |
| 3529 | .set_affinity = dmar_msi_set_affinity, |
| 3530 | #endif |
| 3531 | .retrigger = ioapic_retrigger_irq, |
| 3532 | }; |
| 3533 | |
| 3534 | int arch_setup_dmar_msi(unsigned int irq) |
| 3535 | { |
| 3536 | int ret; |
| 3537 | struct msi_msg msg; |
| 3538 | |
| 3539 | ret = msi_compose_msg(NULL, irq, &msg); |
| 3540 | if (ret < 0) |
| 3541 | return ret; |
| 3542 | dmar_msi_write(irq, &msg); |
| 3543 | set_irq_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, |
| 3544 | "edge"); |
| 3545 | return 0; |
| 3546 | } |
| 3547 | #endif |
| 3548 | |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3549 | #ifdef CONFIG_HPET_TIMER |
| 3550 | |
| 3551 | #ifdef CONFIG_SMP |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3552 | static void hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask) |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3553 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3554 | struct irq_desc *desc = irq_to_desc(irq); |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3555 | struct irq_cfg *cfg; |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3556 | struct msi_msg msg; |
| 3557 | unsigned int dest; |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3558 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3559 | dest = set_desc_affinity(desc, mask); |
| 3560 | if (dest == BAD_APICID) |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3561 | return; |
| 3562 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3563 | cfg = desc->chip_data; |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3564 | |
| 3565 | hpet_msi_read(irq, &msg); |
| 3566 | |
| 3567 | msg.data &= ~MSI_DATA_VECTOR_MASK; |
| 3568 | msg.data |= MSI_DATA_VECTOR(cfg->vector); |
| 3569 | msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; |
| 3570 | msg.address_lo |= MSI_ADDR_DEST_ID(dest); |
| 3571 | |
| 3572 | hpet_msi_write(irq, &msg); |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3573 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3574 | |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3575 | #endif /* CONFIG_SMP */ |
| 3576 | |
| 3577 | struct irq_chip hpet_msi_type = { |
| 3578 | .name = "HPET_MSI", |
| 3579 | .unmask = hpet_msi_unmask, |
| 3580 | .mask = hpet_msi_mask, |
| 3581 | .ack = ack_apic_edge, |
| 3582 | #ifdef CONFIG_SMP |
| 3583 | .set_affinity = hpet_msi_set_affinity, |
| 3584 | #endif |
| 3585 | .retrigger = ioapic_retrigger_irq, |
| 3586 | }; |
| 3587 | |
| 3588 | int arch_setup_hpet_msi(unsigned int irq) |
| 3589 | { |
| 3590 | int ret; |
| 3591 | struct msi_msg msg; |
| 3592 | |
| 3593 | ret = msi_compose_msg(NULL, irq, &msg); |
| 3594 | if (ret < 0) |
| 3595 | return ret; |
| 3596 | |
| 3597 | hpet_msi_write(irq, &msg); |
| 3598 | set_irq_chip_and_handler_name(irq, &hpet_msi_type, handle_edge_irq, |
| 3599 | "edge"); |
Yinghai Lu | c81bba4 | 2008-09-25 11:53:11 -0700 | [diff] [blame] | 3600 | |
venkatesh.pallipadi@intel.com | 58ac1e7 | 2008-09-05 18:02:17 -0700 | [diff] [blame] | 3601 | return 0; |
| 3602 | } |
| 3603 | #endif |
| 3604 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3605 | #endif /* CONFIG_PCI_MSI */ |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3606 | /* |
| 3607 | * Hypertransport interrupt support |
| 3608 | */ |
| 3609 | #ifdef CONFIG_HT_IRQ |
| 3610 | |
| 3611 | #ifdef CONFIG_SMP |
| 3612 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3613 | static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector) |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3614 | { |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3615 | struct ht_irq_msg msg; |
| 3616 | fetch_ht_irq_msg(irq, &msg); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3617 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3618 | msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK | HT_IRQ_LOW_DEST_ID_MASK); |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3619 | msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3620 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3621 | msg.address_lo |= HT_IRQ_LOW_VECTOR(vector) | HT_IRQ_LOW_DEST_ID(dest); |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3622 | msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3623 | |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3624 | write_ht_irq_msg(irq, &msg); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3625 | } |
| 3626 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3627 | static void set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask) |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3628 | { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3629 | struct irq_desc *desc = irq_to_desc(irq); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3630 | struct irq_cfg *cfg; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3631 | unsigned int dest; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3632 | |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3633 | dest = set_desc_affinity(desc, mask); |
| 3634 | if (dest == BAD_APICID) |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3635 | return; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3636 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3637 | cfg = desc->chip_data; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3638 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3639 | target_ht_irq(irq, dest, cfg->vector); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3640 | } |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3641 | |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3642 | #endif |
| 3643 | |
Aneesh Kumar K.V | c37e108 | 2006-10-11 01:20:43 -0700 | [diff] [blame] | 3644 | static struct irq_chip ht_irq_chip = { |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3645 | .name = "PCI-HT", |
| 3646 | .mask = mask_ht_irq, |
| 3647 | .unmask = unmask_ht_irq, |
Yinghai Lu | 1d02519 | 2008-08-19 20:50:34 -0700 | [diff] [blame] | 3648 | .ack = ack_apic_edge, |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3649 | #ifdef CONFIG_SMP |
| 3650 | .set_affinity = set_ht_irq_affinity, |
| 3651 | #endif |
| 3652 | .retrigger = ioapic_retrigger_irq, |
| 3653 | }; |
| 3654 | |
| 3655 | int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) |
| 3656 | { |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3657 | struct irq_cfg *cfg; |
| 3658 | int err; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3659 | |
Jan Beulich | f118263 | 2009-01-14 12:27:35 +0000 | [diff] [blame] | 3660 | if (disable_apic) |
| 3661 | return -ENXIO; |
| 3662 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3663 | cfg = irq_cfg(irq); |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 3664 | err = assign_irq_vector(irq, cfg, apic->target_cpus()); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3665 | if (!err) { |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3666 | struct ht_irq_msg msg; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3667 | unsigned dest; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3668 | |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 3669 | dest = apic->cpu_mask_to_apicid_and(cfg->domain, |
| 3670 | apic->target_cpus()); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3671 | |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3672 | msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3673 | |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3674 | msg.address_lo = |
| 3675 | HT_IRQ_LOW_BASE | |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3676 | HT_IRQ_LOW_DEST_ID(dest) | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3677 | HT_IRQ_LOW_VECTOR(cfg->vector) | |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3678 | ((apic->irq_dest_mode == 0) ? |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3679 | HT_IRQ_LOW_DM_PHYSICAL : |
| 3680 | HT_IRQ_LOW_DM_LOGICAL) | |
| 3681 | HT_IRQ_LOW_RQEOI_EDGE | |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3682 | ((apic->irq_delivery_mode != dest_LowestPrio) ? |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3683 | HT_IRQ_LOW_MT_FIXED : |
| 3684 | HT_IRQ_LOW_MT_ARBITRATED) | |
| 3685 | HT_IRQ_LOW_IRQ_MASKED; |
| 3686 | |
Eric W. Biederman | ec68307 | 2006-11-08 17:44:57 -0800 | [diff] [blame] | 3687 | write_ht_irq_msg(irq, &msg); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3688 | |
Ingo Molnar | a460e74 | 2006-10-17 00:10:03 -0700 | [diff] [blame] | 3689 | set_irq_chip_and_handler_name(irq, &ht_irq_chip, |
| 3690 | handle_edge_irq, "edge"); |
Yinghai Lu | c81bba4 | 2008-09-25 11:53:11 -0700 | [diff] [blame] | 3691 | |
| 3692 | dev_printk(KERN_DEBUG, &dev->dev, "irq %d for HT\n", irq); |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3693 | } |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3694 | return err; |
Eric W. Biederman | 8b955b0 | 2006-10-04 02:16:55 -0700 | [diff] [blame] | 3695 | } |
| 3696 | #endif /* CONFIG_HT_IRQ */ |
| 3697 | |
Nick Piggin | 03b4863 | 2009-01-20 04:36:04 +0100 | [diff] [blame] | 3698 | #ifdef CONFIG_X86_UV |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 3699 | /* |
| 3700 | * Re-target the irq to the specified CPU and enable the specified MMR located |
| 3701 | * on the specified blade to allow the sending of MSIs to the specified CPU. |
| 3702 | */ |
| 3703 | int arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade, |
| 3704 | unsigned long mmr_offset) |
| 3705 | { |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3706 | const struct cpumask *eligible_cpu = cpumask_of(cpu); |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 3707 | struct irq_cfg *cfg; |
| 3708 | int mmr_pnode; |
| 3709 | unsigned long mmr_value; |
| 3710 | struct uv_IO_APIC_route_entry *entry; |
| 3711 | unsigned long flags; |
| 3712 | int err; |
| 3713 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3714 | cfg = irq_cfg(irq); |
| 3715 | |
Mike Travis | e798673 | 2008-12-16 17:33:52 -0800 | [diff] [blame] | 3716 | err = assign_irq_vector(irq, cfg, eligible_cpu); |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 3717 | if (err != 0) |
| 3718 | return err; |
| 3719 | |
| 3720 | spin_lock_irqsave(&vector_lock, flags); |
| 3721 | set_irq_chip_and_handler_name(irq, &uv_irq_chip, handle_percpu_irq, |
| 3722 | irq_name); |
| 3723 | spin_unlock_irqrestore(&vector_lock, flags); |
| 3724 | |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 3725 | mmr_value = 0; |
| 3726 | entry = (struct uv_IO_APIC_route_entry *)&mmr_value; |
| 3727 | BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long)); |
| 3728 | |
| 3729 | entry->vector = cfg->vector; |
Ingo Molnar | 9b5bc8d | 2009-01-28 04:09:58 +0100 | [diff] [blame] | 3730 | entry->delivery_mode = apic->irq_delivery_mode; |
| 3731 | entry->dest_mode = apic->irq_dest_mode; |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 3732 | entry->polarity = 0; |
| 3733 | entry->trigger = 0; |
| 3734 | entry->mask = 0; |
Ingo Molnar | debccb3 | 2009-01-28 15:20:18 +0100 | [diff] [blame] | 3735 | entry->dest = apic->cpu_mask_to_apicid(eligible_cpu); |
Dean Nelson | 4173a0e | 2008-10-02 12:18:21 -0500 | [diff] [blame] | 3736 | |
| 3737 | mmr_pnode = uv_blade_to_pnode(mmr_blade); |
| 3738 | uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value); |
| 3739 | |
| 3740 | return irq; |
| 3741 | } |
| 3742 | |
| 3743 | /* |
| 3744 | * Disable the specified MMR located on the specified blade so that MSIs are |
| 3745 | * longer allowed to be sent. |
| 3746 | */ |
| 3747 | void arch_disable_uv_irq(int mmr_blade, unsigned long mmr_offset) |
| 3748 | { |
| 3749 | unsigned long mmr_value; |
| 3750 | struct uv_IO_APIC_route_entry *entry; |
| 3751 | int mmr_pnode; |
| 3752 | |
| 3753 | mmr_value = 0; |
| 3754 | entry = (struct uv_IO_APIC_route_entry *)&mmr_value; |
| 3755 | BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != sizeof(unsigned long)); |
| 3756 | |
| 3757 | entry->mask = 1; |
| 3758 | |
| 3759 | mmr_pnode = uv_blade_to_pnode(mmr_blade); |
| 3760 | uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value); |
| 3761 | } |
| 3762 | #endif /* CONFIG_X86_64 */ |
| 3763 | |
Yinghai Lu | 9d6a4d0 | 2008-08-19 20:50:52 -0700 | [diff] [blame] | 3764 | int __init io_apic_get_redir_entries (int ioapic) |
| 3765 | { |
| 3766 | union IO_APIC_reg_01 reg_01; |
| 3767 | unsigned long flags; |
| 3768 | |
| 3769 | spin_lock_irqsave(&ioapic_lock, flags); |
| 3770 | reg_01.raw = io_apic_read(ioapic, 1); |
| 3771 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 3772 | |
| 3773 | return reg_01.bits.entries; |
| 3774 | } |
| 3775 | |
Yinghai Lu | be5d535 | 2008-12-05 18:58:33 -0800 | [diff] [blame] | 3776 | void __init probe_nr_irqs_gsi(void) |
Yinghai Lu | 9d6a4d0 | 2008-08-19 20:50:52 -0700 | [diff] [blame] | 3777 | { |
Yinghai Lu | be5d535 | 2008-12-05 18:58:33 -0800 | [diff] [blame] | 3778 | int nr = 0; |
| 3779 | |
Yinghai Lu | cc6c500 | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3780 | nr = acpi_probe_gsi(); |
| 3781 | if (nr > nr_irqs_gsi) { |
Yinghai Lu | be5d535 | 2008-12-05 18:58:33 -0800 | [diff] [blame] | 3782 | nr_irqs_gsi = nr; |
Yinghai Lu | cc6c500 | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3783 | } else { |
| 3784 | /* for acpi=off or acpi is not compiled in */ |
| 3785 | int idx; |
| 3786 | |
| 3787 | nr = 0; |
| 3788 | for (idx = 0; idx < nr_ioapics; idx++) |
| 3789 | nr += io_apic_get_redir_entries(idx) + 1; |
| 3790 | |
| 3791 | if (nr > nr_irqs_gsi) |
| 3792 | nr_irqs_gsi = nr; |
| 3793 | } |
| 3794 | |
| 3795 | printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi); |
Yinghai Lu | 9d6a4d0 | 2008-08-19 20:50:52 -0700 | [diff] [blame] | 3796 | } |
| 3797 | |
Yinghai Lu | 4a046d1 | 2009-01-12 17:39:24 -0800 | [diff] [blame] | 3798 | #ifdef CONFIG_SPARSE_IRQ |
| 3799 | int __init arch_probe_nr_irqs(void) |
| 3800 | { |
| 3801 | int nr; |
| 3802 | |
Yinghai Lu | f1ee554 | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3803 | if (nr_irqs > (NR_VECTORS * nr_cpu_ids)) |
| 3804 | nr_irqs = NR_VECTORS * nr_cpu_ids; |
Yinghai Lu | 4a046d1 | 2009-01-12 17:39:24 -0800 | [diff] [blame] | 3805 | |
Yinghai Lu | f1ee554 | 2009-02-08 16:18:03 -0800 | [diff] [blame] | 3806 | nr = nr_irqs_gsi + 8 * nr_cpu_ids; |
| 3807 | #if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ) |
| 3808 | /* |
| 3809 | * for MSI and HT dyn irq |
| 3810 | */ |
| 3811 | nr += nr_irqs_gsi * 16; |
| 3812 | #endif |
| 3813 | if (nr < nr_irqs) |
Yinghai Lu | 4a046d1 | 2009-01-12 17:39:24 -0800 | [diff] [blame] | 3814 | nr_irqs = nr; |
| 3815 | |
| 3816 | return 0; |
| 3817 | } |
| 3818 | #endif |
| 3819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3820 | /* -------------------------------------------------------------------------- |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3821 | ACPI-based IOAPIC Configuration |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3822 | -------------------------------------------------------------------------- */ |
| 3823 | |
Len Brown | 888ba6c | 2005-08-24 12:07:20 -0400 | [diff] [blame] | 3824 | #ifdef CONFIG_ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3825 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3826 | #ifdef CONFIG_X86_32 |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3827 | int __init io_apic_get_unique_id(int ioapic, int apic_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3828 | { |
| 3829 | union IO_APIC_reg_00 reg_00; |
| 3830 | static physid_mask_t apic_id_map = PHYSID_MASK_NONE; |
| 3831 | physid_mask_t tmp; |
| 3832 | unsigned long flags; |
| 3833 | int i = 0; |
| 3834 | |
| 3835 | /* |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3836 | * The P4 platform supports up to 256 APIC IDs on two separate APIC |
| 3837 | * buses (one for LAPICs, one for IOAPICs), where predecessors only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3838 | * supports up to 16 on one shared APIC bus. |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3839 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full |
| 3841 | * advantage of new APIC bus architecture. |
| 3842 | */ |
| 3843 | |
| 3844 | if (physids_empty(apic_id_map)) |
Ingo Molnar | d190cb8 | 2009-01-28 06:50:47 +0100 | [diff] [blame] | 3845 | apic_id_map = apic->ioapic_phys_id_map(phys_cpu_present_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3846 | |
| 3847 | spin_lock_irqsave(&ioapic_lock, flags); |
| 3848 | reg_00.raw = io_apic_read(ioapic, 0); |
| 3849 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 3850 | |
| 3851 | if (apic_id >= get_physical_broadcast()) { |
| 3852 | printk(KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying " |
| 3853 | "%d\n", ioapic, apic_id, reg_00.bits.ID); |
| 3854 | apic_id = reg_00.bits.ID; |
| 3855 | } |
| 3856 | |
| 3857 | /* |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3858 | * Every APIC in a system must have a unique ID or we get lots of nice |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3859 | * 'stuck on smp_invalidate_needed IPI wait' messages. |
| 3860 | */ |
Ingo Molnar | d1d7cae | 2009-01-28 05:41:42 +0100 | [diff] [blame] | 3861 | if (apic->check_apicid_used(apic_id_map, apic_id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3862 | |
| 3863 | for (i = 0; i < get_physical_broadcast(); i++) { |
Ingo Molnar | d1d7cae | 2009-01-28 05:41:42 +0100 | [diff] [blame] | 3864 | if (!apic->check_apicid_used(apic_id_map, i)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3865 | break; |
| 3866 | } |
| 3867 | |
| 3868 | if (i == get_physical_broadcast()) |
| 3869 | panic("Max apic_id exceeded!\n"); |
| 3870 | |
| 3871 | printk(KERN_WARNING "IOAPIC[%d]: apic_id %d already used, " |
| 3872 | "trying %d\n", ioapic, apic_id, i); |
| 3873 | |
| 3874 | apic_id = i; |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3875 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3876 | |
Ingo Molnar | 8058714 | 2009-01-28 06:50:47 +0100 | [diff] [blame] | 3877 | tmp = apic->apicid_to_cpu_present(apic_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3878 | physids_or(apic_id_map, apic_id_map, tmp); |
| 3879 | |
| 3880 | if (reg_00.bits.ID != apic_id) { |
| 3881 | reg_00.bits.ID = apic_id; |
| 3882 | |
| 3883 | spin_lock_irqsave(&ioapic_lock, flags); |
| 3884 | io_apic_write(ioapic, 0, reg_00.raw); |
| 3885 | reg_00.raw = io_apic_read(ioapic, 0); |
| 3886 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 3887 | |
| 3888 | /* Sanity check */ |
Andreas Deresch | 6070f9e | 2006-02-26 04:18:34 +0100 | [diff] [blame] | 3889 | if (reg_00.bits.ID != apic_id) { |
| 3890 | printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic); |
| 3891 | return -1; |
| 3892 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3893 | } |
| 3894 | |
| 3895 | apic_printk(APIC_VERBOSE, KERN_INFO |
| 3896 | "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id); |
| 3897 | |
| 3898 | return apic_id; |
| 3899 | } |
| 3900 | |
Paolo Ciarrocchi | 3606244 | 2008-06-08 13:07:18 +0200 | [diff] [blame] | 3901 | int __init io_apic_get_version(int ioapic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3902 | { |
| 3903 | union IO_APIC_reg_01 reg_01; |
| 3904 | unsigned long flags; |
| 3905 | |
| 3906 | spin_lock_irqsave(&ioapic_lock, flags); |
| 3907 | reg_01.raw = io_apic_read(ioapic, 1); |
| 3908 | spin_unlock_irqrestore(&ioapic_lock, flags); |
| 3909 | |
| 3910 | return reg_01.bits.version; |
| 3911 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3912 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3913 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3914 | int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3915 | { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3916 | struct irq_desc *desc; |
| 3917 | struct irq_cfg *cfg; |
| 3918 | int cpu = boot_cpu_id; |
| 3919 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3920 | if (!IO_APIC_IRQ(irq)) { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3921 | apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3922 | ioapic); |
| 3923 | return -EINVAL; |
| 3924 | } |
| 3925 | |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3926 | desc = irq_to_desc_alloc_cpu(irq, cpu); |
| 3927 | if (!desc) { |
| 3928 | printk(KERN_INFO "can not get irq_desc %d\n", irq); |
| 3929 | return 0; |
| 3930 | } |
| 3931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3932 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3933 | * IRQs < 16 are already in the irq_2_pin[] map |
| 3934 | */ |
Yinghai Lu | 99d093d | 2008-12-05 18:58:32 -0800 | [diff] [blame] | 3935 | if (irq >= NR_IRQS_LEGACY) { |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3936 | cfg = desc->chip_data; |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3937 | add_pin_to_irq_cpu(cfg, cpu, ioapic, pin); |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3938 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3939 | |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3940 | setup_IO_APIC_irq(ioapic, pin, irq, desc, triggering, polarity); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3941 | |
| 3942 | return 0; |
| 3943 | } |
| 3944 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 3945 | |
Shaohua Li | 61fd47e | 2007-11-17 01:05:28 -0500 | [diff] [blame] | 3946 | int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity) |
| 3947 | { |
| 3948 | int i; |
| 3949 | |
| 3950 | if (skip_ioapic_setup) |
| 3951 | return -1; |
| 3952 | |
| 3953 | for (i = 0; i < mp_irq_entries; i++) |
Jaswinder Singh Rajput | c2c2174 | 2009-01-12 17:47:22 +0530 | [diff] [blame] | 3954 | if (mp_irqs[i].irqtype == mp_INT && |
| 3955 | mp_irqs[i].srcbusirq == bus_irq) |
Shaohua Li | 61fd47e | 2007-11-17 01:05:28 -0500 | [diff] [blame] | 3956 | break; |
| 3957 | if (i >= mp_irq_entries) |
| 3958 | return -1; |
| 3959 | |
| 3960 | *trigger = irq_trigger(i); |
| 3961 | *polarity = irq_polarity(i); |
| 3962 | return 0; |
| 3963 | } |
| 3964 | |
Len Brown | 888ba6c | 2005-08-24 12:07:20 -0400 | [diff] [blame] | 3965 | #endif /* CONFIG_ACPI */ |
Rusty Russell | 1a3f239 | 2006-09-26 10:52:32 +0200 | [diff] [blame] | 3966 | |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3967 | /* |
| 3968 | * This function currently is only a helper for the i386 smp boot process where |
| 3969 | * we need to reprogram the ioredtbls to cater for the cpus which have come online |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 3970 | * so mask in all cases should simply be apic->target_cpus() |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3971 | */ |
| 3972 | #ifdef CONFIG_SMP |
| 3973 | void __init setup_ioapic_dest(void) |
| 3974 | { |
| 3975 | int pin, ioapic, irq, irq_entry; |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 3976 | struct irq_desc *desc; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3977 | struct irq_cfg *cfg; |
Mike Travis | 22f65d3 | 2008-12-16 17:33:56 -0800 | [diff] [blame] | 3978 | const struct cpumask *mask; |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3979 | |
| 3980 | if (skip_ioapic_setup == 1) |
| 3981 | return; |
| 3982 | |
| 3983 | for (ioapic = 0; ioapic < nr_ioapics; ioapic++) { |
| 3984 | for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) { |
| 3985 | irq_entry = find_irq_entry(ioapic, pin, mp_INT); |
| 3986 | if (irq_entry == -1) |
| 3987 | continue; |
| 3988 | irq = pin_2_irq(irq_entry, ioapic, pin); |
| 3989 | |
| 3990 | /* setup_IO_APIC_irqs could fail to get vector for some device |
| 3991 | * when you have too many devices, because at that time only boot |
| 3992 | * cpu is online. |
| 3993 | */ |
Yinghai Lu | 0b8f1ef | 2008-12-05 18:58:31 -0800 | [diff] [blame] | 3994 | desc = irq_to_desc(irq); |
| 3995 | cfg = desc->chip_data; |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 3996 | if (!cfg->vector) { |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 3997 | setup_IO_APIC_irq(ioapic, pin, irq, desc, |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 3998 | irq_trigger(irq_entry), |
| 3999 | irq_polarity(irq_entry)); |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 4000 | continue; |
| 4001 | |
| 4002 | } |
| 4003 | |
| 4004 | /* |
| 4005 | * Honour affinities which have been set in early boot |
| 4006 | */ |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 4007 | if (desc->status & |
| 4008 | (IRQ_NO_BALANCING | IRQ_AFFINITY_SET)) |
Mike Travis | 7f7ace0 | 2009-01-10 21:58:08 -0800 | [diff] [blame] | 4009 | mask = desc->affinity; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4010 | else |
Ingo Molnar | fe402e1 | 2009-01-28 04:32:51 +0100 | [diff] [blame] | 4011 | mask = apic->target_cpus(); |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 4012 | |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 4013 | if (intr_remapping_enabled) |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 4014 | set_ir_ioapic_affinity_irq_desc(desc, mask); |
Thomas Gleixner | 6c2e940 | 2008-11-07 12:33:49 +0100 | [diff] [blame] | 4015 | else |
Yinghai Lu | 3145e94 | 2008-12-05 18:58:34 -0800 | [diff] [blame] | 4016 | set_ioapic_affinity_irq_desc(desc, mask); |
Yinghai Lu | 497c9a1 | 2008-08-19 20:50:28 -0700 | [diff] [blame] | 4017 | } |
| 4018 | |
| 4019 | } |
| 4020 | } |
| 4021 | #endif |
| 4022 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4023 | #define IOAPIC_RESOURCE_NAME_SIZE 11 |
| 4024 | |
| 4025 | static struct resource *ioapic_resources; |
| 4026 | |
| 4027 | static struct resource * __init ioapic_setup_resources(void) |
| 4028 | { |
| 4029 | unsigned long n; |
| 4030 | struct resource *res; |
| 4031 | char *mem; |
| 4032 | int i; |
| 4033 | |
| 4034 | if (nr_ioapics <= 0) |
| 4035 | return NULL; |
| 4036 | |
| 4037 | n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource); |
| 4038 | n *= nr_ioapics; |
| 4039 | |
| 4040 | mem = alloc_bootmem(n); |
| 4041 | res = (void *)mem; |
| 4042 | |
| 4043 | if (mem != NULL) { |
| 4044 | mem += sizeof(struct resource) * nr_ioapics; |
| 4045 | |
| 4046 | for (i = 0; i < nr_ioapics; i++) { |
| 4047 | res[i].name = mem; |
| 4048 | res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 4049 | sprintf(mem, "IOAPIC %u", i); |
| 4050 | mem += IOAPIC_RESOURCE_NAME_SIZE; |
| 4051 | } |
| 4052 | } |
| 4053 | |
| 4054 | ioapic_resources = res; |
| 4055 | |
| 4056 | return res; |
| 4057 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4058 | |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4059 | void __init ioapic_init_mappings(void) |
| 4060 | { |
| 4061 | unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4062 | struct resource *ioapic_res; |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 4063 | int i; |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4064 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4065 | ioapic_res = ioapic_setup_resources(); |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4066 | for (i = 0; i < nr_ioapics; i++) { |
| 4067 | if (smp_found_config) { |
Jaswinder Singh Rajput | b5ba7e6 | 2009-01-12 17:46:17 +0530 | [diff] [blame] | 4068 | ioapic_phys = mp_ioapics[i].apicaddr; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4069 | #ifdef CONFIG_X86_32 |
Thomas Gleixner | d6c88a5 | 2008-10-15 15:27:23 +0200 | [diff] [blame] | 4070 | if (!ioapic_phys) { |
| 4071 | printk(KERN_ERR |
| 4072 | "WARNING: bogus zero IO-APIC " |
| 4073 | "address found in MPTABLE, " |
| 4074 | "disabling IO/APIC support!\n"); |
| 4075 | smp_found_config = 0; |
| 4076 | skip_ioapic_setup = 1; |
| 4077 | goto fake_ioapic_page; |
| 4078 | } |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4079 | #endif |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4080 | } else { |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4081 | #ifdef CONFIG_X86_32 |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4082 | fake_ioapic_page: |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4083 | #endif |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4084 | ioapic_phys = (unsigned long) |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4085 | alloc_bootmem_pages(PAGE_SIZE); |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4086 | ioapic_phys = __pa(ioapic_phys); |
| 4087 | } |
| 4088 | set_fixmap_nocache(idx, ioapic_phys); |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4089 | apic_printk(APIC_VERBOSE, |
| 4090 | "mapped IOAPIC to %08lx (%08lx)\n", |
| 4091 | __fix_to_virt(idx), ioapic_phys); |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4092 | idx++; |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4093 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4094 | if (ioapic_res != NULL) { |
| 4095 | ioapic_res->start = ioapic_phys; |
| 4096 | ioapic_res->end = ioapic_phys + (4 * 1024) - 1; |
| 4097 | ioapic_res++; |
| 4098 | } |
Yinghai Lu | f3294a3 | 2008-06-27 01:41:56 -0700 | [diff] [blame] | 4099 | } |
| 4100 | } |
| 4101 | |
Ingo Molnar | 54168ed | 2008-08-20 09:07:45 +0200 | [diff] [blame] | 4102 | static int __init ioapic_insert_resources(void) |
| 4103 | { |
| 4104 | int i; |
| 4105 | struct resource *r = ioapic_resources; |
| 4106 | |
| 4107 | if (!r) { |
| 4108 | printk(KERN_ERR |
| 4109 | "IO APIC resources could be not be allocated.\n"); |
| 4110 | return -1; |
| 4111 | } |
| 4112 | |
| 4113 | for (i = 0; i < nr_ioapics; i++) { |
| 4114 | insert_resource(&iomem_resource, r); |
| 4115 | r++; |
| 4116 | } |
| 4117 | |
| 4118 | return 0; |
| 4119 | } |
| 4120 | |
| 4121 | /* Insert the IO APIC resources after PCI initialization has occured to handle |
| 4122 | * IO APICS that are mapped in on a BAR in PCI space. */ |
| 4123 | late_initcall(ioapic_insert_resources); |