root/arch/mips/cavium-octeon/octeon-irq.c

DEFINITIONS

1. octeon_irq_set_ciu_mapping
2. octeon_irq_free_cd
3. octeon_irq_force_ciu_mapping
4. octeon_coreid_for_cpu
5. octeon_cpu_for_coreid
6. octeon_irq_core_ack
7. octeon_irq_core_eoi
8. octeon_irq_core_set_enable_local
9. octeon_irq_core_disable
10. octeon_irq_core_enable
11. octeon_irq_core_bus_lock
12. octeon_irq_core_bus_sync_unlock
13. octeon_irq_init_core
14. next_cpu_for_irq
15. octeon_irq_ciu_enable
16. octeon_irq_ciu_enable_local
17. octeon_irq_ciu_disable_local
18. octeon_irq_ciu_disable_all
19. octeon_irq_ciu_enable_all
20. octeon_irq_ciu_enable_v2
21. octeon_irq_ciu_enable_sum2
22. octeon_irq_ciu_disable_local_sum2
23. octeon_irq_ciu_ack_sum2
24. octeon_irq_ciu_disable_all_sum2
25. octeon_irq_ciu_enable_local_v2
26. octeon_irq_ciu_disable_local_v2
27. octeon_irq_ciu_ack
28. octeon_irq_ciu_disable_all_v2
29. octeon_irq_ciu_enable_all_v2
30. octeon_irq_ciu_set_type
31. octeon_irq_gpio_setup
32. octeon_irq_ciu_enable_gpio_v2
33. octeon_irq_ciu_enable_gpio
34. octeon_irq_ciu_gpio_set_type
35. octeon_irq_ciu_disable_gpio_v2
36. octeon_irq_ciu_disable_gpio
37. octeon_irq_ciu_gpio_ack
38. octeon_irq_cpu_offline_ciu
39. octeon_irq_ciu_set_affinity
40. octeon_irq_ciu_set_affinity_v2
41. octeon_irq_ciu_set_affinity_sum2
42. edge_startup
43. octeon_irq_ciu_wd_enable
44. octeon_irq_ciu1_wd_enable_v2
45. octeon_irq_ciu_is_edge
46. octeon_irq_gpio_xlat
47. octeon_irq_ciu_xlat
48. octeon_irq_ciu_map
49. octeon_irq_gpio_map
50. octeon_irq_ip2_ciu
51. octeon_irq_ip3_ciu
52. octeon_irq_ip4_ciu
53. octeon_irq_local_enable_ip4
54. octeon_irq_ip4_mask
55. octeon_irq_set_ip4_handler
56. octeon_irq_percpu_enable
57. octeon_irq_init_ciu_percpu
58. octeon_irq_init_ciu2_percpu
59. octeon_irq_setup_secondary_ciu
60. octeon_irq_setup_secondary_ciu2
61. octeon_irq_init_ciu
62. octeon_irq_init_gpio
63. octeon_irq_ciu2_wd_enable
64. octeon_irq_ciu2_enable
65. octeon_irq_ciu2_enable_local
66. octeon_irq_ciu2_disable_local
67. octeon_irq_ciu2_ack
68. octeon_irq_ciu2_disable_all
69. octeon_irq_ciu2_mbox_enable_all
70. octeon_irq_ciu2_mbox_disable_all
71. octeon_irq_ciu2_mbox_enable_local
72. octeon_irq_ciu2_mbox_disable_local
73. octeon_irq_ciu2_set_affinity
74. octeon_irq_ciu2_enable_gpio
75. octeon_irq_ciu2_disable_gpio
76. octeon_irq_ciu2_xlat
77. octeon_irq_ciu2_is_edge
78. octeon_irq_ciu2_map
79. octeon_irq_ciu2
80. octeon_irq_ciu2_mbox
81. octeon_irq_init_ciu2
82. octeon_irq_cib_enable
83. octeon_irq_cib_disable
84. octeon_irq_cib_set_type
85. octeon_irq_cib_xlat
86. octeon_irq_cib_map
87. octeon_irq_cib_handler
88. octeon_irq_init_cib
89. octeon_irq_ciu3_xlat
90. octeon_irq_ciu3_enable
91. octeon_irq_ciu3_disable
92. octeon_irq_ciu3_ack
93. octeon_irq_ciu3_mask
94. octeon_irq_ciu3_mask_ack
95. octeon_irq_ciu3_set_affinity
96. octeon_irq_ciu3_mapx
97. octeon_irq_ciu3_map
98. octeon_irq_ciu3_ip2
99. octeon_irq_ciu3_base_mbox_intsn
100. octeon_irq_ciu3_mbox_intsn_for_core
101. octeon_irq_ciu3_mbox_intsn_for_cpu
102. octeon_irq_ciu3_mbox
103. octeon_ciu3_mbox_send
104. octeon_irq_ciu3_mbox_set_enable
105. octeon_irq_ciu3_mbox_enable
106. octeon_irq_ciu3_mbox_disable
107. octeon_irq_ciu3_mbox_ack
108. octeon_irq_ciu3_mbox_cpu_online
109. octeon_irq_ciu3_mbox_cpu_offline
110. octeon_irq_ciu3_alloc_resources
111. octeon_irq_setup_secondary_ciu3
112. octeon_irq_init_ciu3
113. arch_init_irq
114. plat_irq_dispatch
115. octeon_fixup_irqs
116. octeon_irq_get_block_domain

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2004-2016 Cavium, Inc.
   7  */
   8 
   9 #include <linux/of_address.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/irqdomain.h>
  12 #include <linux/bitops.h>
  13 #include <linux/of_irq.h>
  14 #include <linux/percpu.h>
  15 #include <linux/slab.h>
  16 #include <linux/irq.h>
  17 #include <linux/smp.h>
  18 #include <linux/of.h>
  19 
  20 #include <asm/octeon/octeon.h>
  21 #include <asm/octeon/cvmx-ciu2-defs.h>
  22 #include <asm/octeon/cvmx-ciu3-defs.h>
  23 
  24 static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
  25 static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
  26 static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
  27 static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip2);
  28 
  29 static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip3);
  30 static DEFINE_PER_CPU(struct octeon_ciu3_info *, octeon_ciu3_info);
  31 #define CIU3_MBOX_PER_CORE 10
  32 
  33 /*
  34  * The 8 most significant bits of the intsn identify the interrupt major block.
  35  * Each major block might use its own interrupt domain. Thus 256 domains are
  36  * needed.
  37  */
  38 #define MAX_CIU3_DOMAINS                256
  39 
  40 typedef irq_hw_number_t (*octeon_ciu3_intsn2hw_t)(struct irq_domain *, unsigned int);
  41 
  42 /* Information for each ciu3 in the system */
  43 struct octeon_ciu3_info {
  44         u64                     ciu3_addr;
  45         int                     node;
  46         struct irq_domain       *domain[MAX_CIU3_DOMAINS];
  47         octeon_ciu3_intsn2hw_t  intsn2hw[MAX_CIU3_DOMAINS];
  48 };
  49 
  50 /* Each ciu3 in the system uses its own data (one ciu3 per node) */
  51 static struct octeon_ciu3_info  *octeon_ciu3_info_per_node[4];
  52 
  53 struct octeon_irq_ciu_domain_data {
  54         int num_sum;  /* number of sum registers (2 or 3). */
  55 };
  56 
  57 /* Register offsets from ciu3_addr */
  58 #define CIU3_CONST              0x220
  59 #define CIU3_IDT_CTL(_idt)      ((_idt) * 8 + 0x110000)
  60 #define CIU3_IDT_PP(_idt, _idx) ((_idt) * 32 + (_idx) * 8 + 0x120000)
  61 #define CIU3_IDT_IO(_idt)       ((_idt) * 8 + 0x130000)
  62 #define CIU3_DEST_PP_INT(_pp_ip) ((_pp_ip) * 8 + 0x200000)
  63 #define CIU3_DEST_IO_INT(_io)   ((_io) * 8 + 0x210000)
  64 #define CIU3_ISC_CTL(_intsn)    ((_intsn) * 8 + 0x80000000)
  65 #define CIU3_ISC_W1C(_intsn)    ((_intsn) * 8 + 0x90000000)
  66 #define CIU3_ISC_W1S(_intsn)    ((_intsn) * 8 + 0xa0000000)
  67 
  68 static __read_mostly int octeon_irq_ciu_to_irq[8][64];
  69 
  70 struct octeon_ciu_chip_data {
  71         union {
  72                 struct {                /* only used for ciu3 */
  73                         u64 ciu3_addr;
  74                         unsigned int intsn;
  75                 };
  76                 struct {                /* only used for ciu/ciu2 */
  77                         u8 line;
  78                         u8 bit;
  79                 };
  80         };
  81         int gpio_line;
  82         int current_cpu;        /* Next CPU expected to take this irq */
  83         int ciu_node; /* NUMA node number of the CIU */
  84 };
  85 
  86 struct octeon_core_chip_data {
  87         struct mutex core_irq_mutex;
  88         bool current_en;
  89         bool desired_en;
  90         u8 bit;
  91 };
  92 
  93 #define MIPS_CORE_IRQ_LINES 8
  94 
  95 static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES];
  96 
  97 static int octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line,
  98                                       struct irq_chip *chip,
  99                                       irq_flow_handler_t handler)
 100 {
 101         struct octeon_ciu_chip_data *cd;
 102 
 103         cd = kzalloc(sizeof(*cd), GFP_KERNEL);
 104         if (!cd)
 105                 return -ENOMEM;
 106 
 107         irq_set_chip_and_handler(irq, chip, handler);
 108 
 109         cd->line = line;
 110         cd->bit = bit;
 111         cd->gpio_line = gpio_line;
 112 
 113         irq_set_chip_data(irq, cd);
 114         octeon_irq_ciu_to_irq[line][bit] = irq;
 115         return 0;
 116 }
 117 
 118 static void octeon_irq_free_cd(struct irq_domain *d, unsigned int irq)
 119 {
 120         struct irq_data *data = irq_get_irq_data(irq);
 121         struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
 122 
 123         irq_set_chip_data(irq, NULL);
 124         kfree(cd);
 125 }
 126 
 127 static int octeon_irq_force_ciu_mapping(struct irq_domain *domain,
 128                                         int irq, int line, int bit)
 129 {
 130         return irq_domain_associate(domain, irq, line << 6 | bit);
 131 }
 132 
 133 static int octeon_coreid_for_cpu(int cpu)
 134 {
 135 #ifdef CONFIG_SMP
 136         return cpu_logical_map(cpu);
 137 #else
 138         return cvmx_get_core_num();
 139 #endif
 140 }
 141 
 142 static int octeon_cpu_for_coreid(int coreid)
 143 {
 144 #ifdef CONFIG_SMP
 145         return cpu_number_map(coreid);
 146 #else
 147         return smp_processor_id();
 148 #endif
 149 }
 150 
 151 static void octeon_irq_core_ack(struct irq_data *data)
 152 {
 153         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 154         unsigned int bit = cd->bit;
 155 
 156         /*
 157          * We don't need to disable IRQs to make these atomic since
 158          * they are already disabled earlier in the low level
 159          * interrupt code.
 160          */
 161         clear_c0_status(0x100 << bit);
 162         /* The two user interrupts must be cleared manually. */
 163         if (bit < 2)
 164                 clear_c0_cause(0x100 << bit);
 165 }
 166 
 167 static void octeon_irq_core_eoi(struct irq_data *data)
 168 {
 169         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 170 
 171         /*
 172          * We don't need to disable IRQs to make these atomic since
 173          * they are already disabled earlier in the low level
 174          * interrupt code.
 175          */
 176         set_c0_status(0x100 << cd->bit);
 177 }
 178 
 179 static void octeon_irq_core_set_enable_local(void *arg)
 180 {
 181         struct irq_data *data = arg;
 182         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 183         unsigned int mask = 0x100 << cd->bit;
 184 
 185         /*
 186          * Interrupts are already disabled, so these are atomic.
 187          */
 188         if (cd->desired_en)
 189                 set_c0_status(mask);
 190         else
 191                 clear_c0_status(mask);
 192 
 193 }
 194 
 195 static void octeon_irq_core_disable(struct irq_data *data)
 196 {
 197         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 198         cd->desired_en = false;
 199 }
 200 
 201 static void octeon_irq_core_enable(struct irq_data *data)
 202 {
 203         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 204         cd->desired_en = true;
 205 }
 206 
 207 static void octeon_irq_core_bus_lock(struct irq_data *data)
 208 {
 209         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 210 
 211         mutex_lock(&cd->core_irq_mutex);
 212 }
 213 
 214 static void octeon_irq_core_bus_sync_unlock(struct irq_data *data)
 215 {
 216         struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
 217 
 218         if (cd->desired_en != cd->current_en) {
 219                 on_each_cpu(octeon_irq_core_set_enable_local, data, 1);
 220 
 221                 cd->current_en = cd->desired_en;
 222         }
 223 
 224         mutex_unlock(&cd->core_irq_mutex);
 225 }
 226 
 227 static struct irq_chip octeon_irq_chip_core = {
 228         .name = "Core",
 229         .irq_enable = octeon_irq_core_enable,
 230         .irq_disable = octeon_irq_core_disable,
 231         .irq_ack = octeon_irq_core_ack,
 232         .irq_eoi = octeon_irq_core_eoi,
 233         .irq_bus_lock = octeon_irq_core_bus_lock,
 234         .irq_bus_sync_unlock = octeon_irq_core_bus_sync_unlock,
 235 
 236         .irq_cpu_online = octeon_irq_core_eoi,
 237         .irq_cpu_offline = octeon_irq_core_ack,
 238         .flags = IRQCHIP_ONOFFLINE_ENABLED,
 239 };
 240 
 241 static void __init octeon_irq_init_core(void)
 242 {
 243         int i;
 244         int irq;
 245         struct octeon_core_chip_data *cd;
 246 
 247         for (i = 0; i < MIPS_CORE_IRQ_LINES; i++) {
 248                 cd = &octeon_irq_core_chip_data[i];
 249                 cd->current_en = false;
 250                 cd->desired_en = false;
 251                 cd->bit = i;
 252                 mutex_init(&cd->core_irq_mutex);
 253 
 254                 irq = OCTEON_IRQ_SW0 + i;
 255                 irq_set_chip_data(irq, cd);
 256                 irq_set_chip_and_handler(irq, &octeon_irq_chip_core,
 257                                          handle_percpu_irq);
 258         }
 259 }
 260 
 261 static int next_cpu_for_irq(struct irq_data *data)
 262 {
 263 
 264 #ifdef CONFIG_SMP
 265         int cpu;
 266         struct cpumask *mask = irq_data_get_affinity_mask(data);
 267         int weight = cpumask_weight(mask);
 268         struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
 269 
 270         if (weight > 1) {
 271                 cpu = cd->current_cpu;
 272                 for (;;) {
 273                         cpu = cpumask_next(cpu, mask);
 274                         if (cpu >= nr_cpu_ids) {
 275                                 cpu = -1;
 276                                 continue;
 277                         } else if (cpumask_test_cpu(cpu, cpu_online_mask)) {
 278                                 break;
 279                         }
 280                 }
 281         } else if (weight == 1) {
 282                 cpu = cpumask_first(mask);
 283         } else {
 284                 cpu = smp_processor_id();
 285         }
 286         cd->current_cpu = cpu;
 287         return cpu;
 288 #else
 289         return smp_processor_id();
 290 #endif
 291 }
 292 
 293 static void octeon_irq_ciu_enable(struct irq_data *data)
 294 {
 295         int cpu = next_cpu_for_irq(data);
 296         int coreid = octeon_coreid_for_cpu(cpu);
 297         unsigned long *pen;
 298         unsigned long flags;
 299         struct octeon_ciu_chip_data *cd;
 300         raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
 301 
 302         cd = irq_data_get_irq_chip_data(data);
 303 
 304         raw_spin_lock_irqsave(lock, flags);
 305         if (cd->line == 0) {
 306                 pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
 307                 __set_bit(cd->bit, pen);
 308                 /*
 309                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 310                  * enabling the irq.
 311                  */
 312                 wmb();
 313                 cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
 314         } else {
 315                 pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
 316                 __set_bit(cd->bit, pen);
 317                 /*
 318                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 319                  * enabling the irq.
 320                  */
 321                 wmb();
 322                 cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
 323         }
 324         raw_spin_unlock_irqrestore(lock, flags);
 325 }
 326 
 327 static void octeon_irq_ciu_enable_local(struct irq_data *data)
 328 {
 329         unsigned long *pen;
 330         unsigned long flags;
 331         struct octeon_ciu_chip_data *cd;
 332         raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
 333 
 334         cd = irq_data_get_irq_chip_data(data);
 335 
 336         raw_spin_lock_irqsave(lock, flags);
 337         if (cd->line == 0) {
 338                 pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
 339                 __set_bit(cd->bit, pen);
 340                 /*
 341                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 342                  * enabling the irq.
 343                  */
 344                 wmb();
 345                 cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
 346         } else {
 347                 pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
 348                 __set_bit(cd->bit, pen);
 349                 /*
 350                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 351                  * enabling the irq.
 352                  */
 353                 wmb();
 354                 cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
 355         }
 356         raw_spin_unlock_irqrestore(lock, flags);
 357 }
 358 
 359 static void octeon_irq_ciu_disable_local(struct irq_data *data)
 360 {
 361         unsigned long *pen;
 362         unsigned long flags;
 363         struct octeon_ciu_chip_data *cd;
 364         raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
 365 
 366         cd = irq_data_get_irq_chip_data(data);
 367 
 368         raw_spin_lock_irqsave(lock, flags);
 369         if (cd->line == 0) {
 370                 pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
 371                 __clear_bit(cd->bit, pen);
 372                 /*
 373                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 374                  * enabling the irq.
 375                  */
 376                 wmb();
 377                 cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
 378         } else {
 379                 pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
 380                 __clear_bit(cd->bit, pen);
 381                 /*
 382                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 383                  * enabling the irq.
 384                  */
 385                 wmb();
 386                 cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
 387         }
 388         raw_spin_unlock_irqrestore(lock, flags);
 389 }
 390 
 391 static void octeon_irq_ciu_disable_all(struct irq_data *data)
 392 {
 393         unsigned long flags;
 394         unsigned long *pen;
 395         int cpu;
 396         struct octeon_ciu_chip_data *cd;
 397         raw_spinlock_t *lock;
 398 
 399         cd = irq_data_get_irq_chip_data(data);
 400 
 401         for_each_online_cpu(cpu) {
 402                 int coreid = octeon_coreid_for_cpu(cpu);
 403                 lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
 404                 if (cd->line == 0)
 405                         pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
 406                 else
 407                         pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
 408 
 409                 raw_spin_lock_irqsave(lock, flags);
 410                 __clear_bit(cd->bit, pen);
 411                 /*
 412                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 413                  * enabling the irq.
 414                  */
 415                 wmb();
 416                 if (cd->line == 0)
 417                         cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
 418                 else
 419                         cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
 420                 raw_spin_unlock_irqrestore(lock, flags);
 421         }
 422 }
 423 
 424 static void octeon_irq_ciu_enable_all(struct irq_data *data)
 425 {
 426         unsigned long flags;
 427         unsigned long *pen;
 428         int cpu;
 429         struct octeon_ciu_chip_data *cd;
 430         raw_spinlock_t *lock;
 431 
 432         cd = irq_data_get_irq_chip_data(data);
 433 
 434         for_each_online_cpu(cpu) {
 435                 int coreid = octeon_coreid_for_cpu(cpu);
 436                 lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
 437                 if (cd->line == 0)
 438                         pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
 439                 else
 440                         pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
 441 
 442                 raw_spin_lock_irqsave(lock, flags);
 443                 __set_bit(cd->bit, pen);
 444                 /*
 445                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 446                  * enabling the irq.
 447                  */
 448                 wmb();
 449                 if (cd->line == 0)
 450                         cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
 451                 else
 452                         cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
 453                 raw_spin_unlock_irqrestore(lock, flags);
 454         }
 455 }
 456 
 457 /*
 458  * Enable the irq on the next core in the affinity set for chips that
 459  * have the EN*_W1{S,C} registers.
 460  */
 461 static void octeon_irq_ciu_enable_v2(struct irq_data *data)
 462 {
 463         u64 mask;
 464         int cpu = next_cpu_for_irq(data);
 465         struct octeon_ciu_chip_data *cd;
 466 
 467         cd = irq_data_get_irq_chip_data(data);
 468         mask = 1ull << (cd->bit);
 469 
 470         /*
 471          * Called under the desc lock, so these should never get out
 472          * of sync.
 473          */
 474         if (cd->line == 0) {
 475                 int index = octeon_coreid_for_cpu(cpu) * 2;
 476                 set_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
 477                 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
 478         } else {
 479                 int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
 480                 set_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
 481                 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
 482         }
 483 }
 484 
 485 /*
 486  * Enable the irq in the sum2 registers.
 487  */
 488 static void octeon_irq_ciu_enable_sum2(struct irq_data *data)
 489 {
 490         u64 mask;
 491         int cpu = next_cpu_for_irq(data);
 492         int index = octeon_coreid_for_cpu(cpu);
 493         struct octeon_ciu_chip_data *cd;
 494 
 495         cd = irq_data_get_irq_chip_data(data);
 496         mask = 1ull << (cd->bit);
 497 
 498         cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
 499 }
 500 
 501 /*
 502  * Disable the irq in the sum2 registers.
 503  */
 504 static void octeon_irq_ciu_disable_local_sum2(struct irq_data *data)
 505 {
 506         u64 mask;
 507         int cpu = next_cpu_for_irq(data);
 508         int index = octeon_coreid_for_cpu(cpu);
 509         struct octeon_ciu_chip_data *cd;
 510 
 511         cd = irq_data_get_irq_chip_data(data);
 512         mask = 1ull << (cd->bit);
 513 
 514         cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
 515 }
 516 
 517 static void octeon_irq_ciu_ack_sum2(struct irq_data *data)
 518 {
 519         u64 mask;
 520         int cpu = next_cpu_for_irq(data);
 521         int index = octeon_coreid_for_cpu(cpu);
 522         struct octeon_ciu_chip_data *cd;
 523 
 524         cd = irq_data_get_irq_chip_data(data);
 525         mask = 1ull << (cd->bit);
 526 
 527         cvmx_write_csr(CVMX_CIU_SUM2_PPX_IP4(index), mask);
 528 }
 529 
 530 static void octeon_irq_ciu_disable_all_sum2(struct irq_data *data)
 531 {
 532         int cpu;
 533         struct octeon_ciu_chip_data *cd;
 534         u64 mask;
 535 
 536         cd = irq_data_get_irq_chip_data(data);
 537         mask = 1ull << (cd->bit);
 538 
 539         for_each_online_cpu(cpu) {
 540                 int coreid = octeon_coreid_for_cpu(cpu);
 541 
 542                 cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(coreid), mask);
 543         }
 544 }
 545 
 546 /*
 547  * Enable the irq on the current CPU for chips that
 548  * have the EN*_W1{S,C} registers.
 549  */
 550 static void octeon_irq_ciu_enable_local_v2(struct irq_data *data)
 551 {
 552         u64 mask;
 553         struct octeon_ciu_chip_data *cd;
 554 
 555         cd = irq_data_get_irq_chip_data(data);
 556         mask = 1ull << (cd->bit);
 557 
 558         if (cd->line == 0) {
 559                 int index = cvmx_get_core_num() * 2;
 560                 set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
 561                 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
 562         } else {
 563                 int index = cvmx_get_core_num() * 2 + 1;
 564                 set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
 565                 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
 566         }
 567 }
 568 
 569 static void octeon_irq_ciu_disable_local_v2(struct irq_data *data)
 570 {
 571         u64 mask;
 572         struct octeon_ciu_chip_data *cd;
 573 
 574         cd = irq_data_get_irq_chip_data(data);
 575         mask = 1ull << (cd->bit);
 576 
 577         if (cd->line == 0) {
 578                 int index = cvmx_get_core_num() * 2;
 579                 clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
 580                 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
 581         } else {
 582                 int index = cvmx_get_core_num() * 2 + 1;
 583                 clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
 584                 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
 585         }
 586 }
 587 
 588 /*
 589  * Write to the W1C bit in CVMX_CIU_INTX_SUM0 to clear the irq.
 590  */
 591 static void octeon_irq_ciu_ack(struct irq_data *data)
 592 {
 593         u64 mask;
 594         struct octeon_ciu_chip_data *cd;
 595 
 596         cd = irq_data_get_irq_chip_data(data);
 597         mask = 1ull << (cd->bit);
 598 
 599         if (cd->line == 0) {
 600                 int index = cvmx_get_core_num() * 2;
 601                 cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask);
 602         } else {
 603                 cvmx_write_csr(CVMX_CIU_INT_SUM1, mask);
 604         }
 605 }
 606 
 607 /*
 608  * Disable the irq on the all cores for chips that have the EN*_W1{S,C}
 609  * registers.
 610  */
 611 static void octeon_irq_ciu_disable_all_v2(struct irq_data *data)
 612 {
 613         int cpu;
 614         u64 mask;
 615         struct octeon_ciu_chip_data *cd;
 616 
 617         cd = irq_data_get_irq_chip_data(data);
 618         mask = 1ull << (cd->bit);
 619 
 620         if (cd->line == 0) {
 621                 for_each_online_cpu(cpu) {
 622                         int index = octeon_coreid_for_cpu(cpu) * 2;
 623                         clear_bit(cd->bit,
 624                                 &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
 625                         cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
 626                 }
 627         } else {
 628                 for_each_online_cpu(cpu) {
 629                         int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
 630                         clear_bit(cd->bit,
 631                                 &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
 632                         cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
 633                 }
 634         }
 635 }
 636 
 637 /*
 638  * Enable the irq on the all cores for chips that have the EN*_W1{S,C}
 639  * registers.
 640  */
 641 static void octeon_irq_ciu_enable_all_v2(struct irq_data *data)
 642 {
 643         int cpu;
 644         u64 mask;
 645         struct octeon_ciu_chip_data *cd;
 646 
 647         cd = irq_data_get_irq_chip_data(data);
 648         mask = 1ull << (cd->bit);
 649 
 650         if (cd->line == 0) {
 651                 for_each_online_cpu(cpu) {
 652                         int index = octeon_coreid_for_cpu(cpu) * 2;
 653                         set_bit(cd->bit,
 654                                 &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
 655                         cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
 656                 }
 657         } else {
 658                 for_each_online_cpu(cpu) {
 659                         int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
 660                         set_bit(cd->bit,
 661                                 &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
 662                         cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
 663                 }
 664         }
 665 }
 666 
 667 static int octeon_irq_ciu_set_type(struct irq_data *data, unsigned int t)
 668 {
 669         irqd_set_trigger_type(data, t);
 670 
 671         if (t & IRQ_TYPE_EDGE_BOTH)
 672                 irq_set_handler_locked(data, handle_edge_irq);
 673         else
 674                 irq_set_handler_locked(data, handle_level_irq);
 675 
 676         return IRQ_SET_MASK_OK;
 677 }
 678 
 679 static void octeon_irq_gpio_setup(struct irq_data *data)
 680 {
 681         union cvmx_gpio_bit_cfgx cfg;
 682         struct octeon_ciu_chip_data *cd;
 683         u32 t = irqd_get_trigger_type(data);
 684 
 685         cd = irq_data_get_irq_chip_data(data);
 686 
 687         cfg.u64 = 0;
 688         cfg.s.int_en = 1;
 689         cfg.s.int_type = (t & IRQ_TYPE_EDGE_BOTH) != 0;
 690         cfg.s.rx_xor = (t & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) != 0;
 691 
 692         /* 140 nS glitch filter*/
 693         cfg.s.fil_cnt = 7;
 694         cfg.s.fil_sel = 3;
 695 
 696         cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), cfg.u64);
 697 }
 698 
 699 static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data)
 700 {
 701         octeon_irq_gpio_setup(data);
 702         octeon_irq_ciu_enable_v2(data);
 703 }
 704 
 705 static void octeon_irq_ciu_enable_gpio(struct irq_data *data)
 706 {
 707         octeon_irq_gpio_setup(data);
 708         octeon_irq_ciu_enable(data);
 709 }
 710 
 711 static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t)
 712 {
 713         irqd_set_trigger_type(data, t);
 714         octeon_irq_gpio_setup(data);
 715 
 716         if (t & IRQ_TYPE_EDGE_BOTH)
 717                 irq_set_handler_locked(data, handle_edge_irq);
 718         else
 719                 irq_set_handler_locked(data, handle_level_irq);
 720 
 721         return IRQ_SET_MASK_OK;
 722 }
 723 
 724 static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data)
 725 {
 726         struct octeon_ciu_chip_data *cd;
 727 
 728         cd = irq_data_get_irq_chip_data(data);
 729         cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
 730 
 731         octeon_irq_ciu_disable_all_v2(data);
 732 }
 733 
 734 static void octeon_irq_ciu_disable_gpio(struct irq_data *data)
 735 {
 736         struct octeon_ciu_chip_data *cd;
 737 
 738         cd = irq_data_get_irq_chip_data(data);
 739         cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
 740 
 741         octeon_irq_ciu_disable_all(data);
 742 }
 743 
 744 static void octeon_irq_ciu_gpio_ack(struct irq_data *data)
 745 {
 746         struct octeon_ciu_chip_data *cd;
 747         u64 mask;
 748 
 749         cd = irq_data_get_irq_chip_data(data);
 750         mask = 1ull << (cd->gpio_line);
 751 
 752         cvmx_write_csr(CVMX_GPIO_INT_CLR, mask);
 753 }
 754 
 755 #ifdef CONFIG_SMP
 756 
 757 static void octeon_irq_cpu_offline_ciu(struct irq_data *data)
 758 {
 759         int cpu = smp_processor_id();
 760         cpumask_t new_affinity;
 761         struct cpumask *mask = irq_data_get_affinity_mask(data);
 762 
 763         if (!cpumask_test_cpu(cpu, mask))
 764                 return;
 765 
 766         if (cpumask_weight(mask) > 1) {
 767                 /*
 768                  * It has multi CPU affinity, just remove this CPU
 769                  * from the affinity set.
 770                  */
 771                 cpumask_copy(&new_affinity, mask);
 772                 cpumask_clear_cpu(cpu, &new_affinity);
 773         } else {
 774                 /* Otherwise, put it on lowest numbered online CPU. */
 775                 cpumask_clear(&new_affinity);
 776                 cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity);
 777         }
 778         irq_set_affinity_locked(data, &new_affinity, false);
 779 }
 780 
 781 static int octeon_irq_ciu_set_affinity(struct irq_data *data,
 782                                        const struct cpumask *dest, bool force)
 783 {
 784         int cpu;
 785         bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
 786         unsigned long flags;
 787         struct octeon_ciu_chip_data *cd;
 788         unsigned long *pen;
 789         raw_spinlock_t *lock;
 790 
 791         cd = irq_data_get_irq_chip_data(data);
 792 
 793         /*
 794          * For non-v2 CIU, we will allow only single CPU affinity.
 795          * This removes the need to do locking in the .ack/.eoi
 796          * functions.
 797          */
 798         if (cpumask_weight(dest) != 1)
 799                 return -EINVAL;
 800 
 801         if (!enable_one)
 802                 return 0;
 803 
 804 
 805         for_each_online_cpu(cpu) {
 806                 int coreid = octeon_coreid_for_cpu(cpu);
 807 
 808                 lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
 809                 raw_spin_lock_irqsave(lock, flags);
 810 
 811                 if (cd->line == 0)
 812                         pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
 813                 else
 814                         pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
 815 
 816                 if (cpumask_test_cpu(cpu, dest) && enable_one) {
 817                         enable_one = false;
 818                         __set_bit(cd->bit, pen);
 819                 } else {
 820                         __clear_bit(cd->bit, pen);
 821                 }
 822                 /*
 823                  * Must be visible to octeon_irq_ip{2,3}_ciu() before
 824                  * enabling the irq.
 825                  */
 826                 wmb();
 827 
 828                 if (cd->line == 0)
 829                         cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
 830                 else
 831                         cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
 832 
 833                 raw_spin_unlock_irqrestore(lock, flags);
 834         }
 835         return 0;
 836 }
 837 
 838 /*
 839  * Set affinity for the irq for chips that have the EN*_W1{S,C}
 840  * registers.
 841  */
 842 static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data,
 843                                           const struct cpumask *dest,
 844                                           bool force)
 845 {
 846         int cpu;
 847         bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
 848         u64 mask;
 849         struct octeon_ciu_chip_data *cd;
 850 
 851         if (!enable_one)
 852                 return 0;
 853 
 854         cd = irq_data_get_irq_chip_data(data);
 855         mask = 1ull << cd->bit;
 856 
 857         if (cd->line == 0) {
 858                 for_each_online_cpu(cpu) {
 859                         unsigned long *pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
 860                         int index = octeon_coreid_for_cpu(cpu) * 2;
 861                         if (cpumask_test_cpu(cpu, dest) && enable_one) {
 862                                 enable_one = false;
 863                                 set_bit(cd->bit, pen);
 864                                 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
 865                         } else {
 866                                 clear_bit(cd->bit, pen);
 867                                 cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
 868                         }
 869                 }
 870         } else {
 871                 for_each_online_cpu(cpu) {
 872                         unsigned long *pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
 873                         int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
 874                         if (cpumask_test_cpu(cpu, dest) && enable_one) {
 875                                 enable_one = false;
 876                                 set_bit(cd->bit, pen);
 877                                 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
 878                         } else {
 879                                 clear_bit(cd->bit, pen);
 880                                 cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
 881                         }
 882                 }
 883         }
 884         return 0;
 885 }
 886 
 887 static int octeon_irq_ciu_set_affinity_sum2(struct irq_data *data,
 888                                             const struct cpumask *dest,
 889                                             bool force)
 890 {
 891         int cpu;
 892         bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
 893         u64 mask;
 894         struct octeon_ciu_chip_data *cd;
 895 
 896         if (!enable_one)
 897                 return 0;
 898 
 899         cd = irq_data_get_irq_chip_data(data);
 900         mask = 1ull << cd->bit;
 901 
 902         for_each_online_cpu(cpu) {
 903                 int index = octeon_coreid_for_cpu(cpu);
 904 
 905                 if (cpumask_test_cpu(cpu, dest) && enable_one) {
 906                         enable_one = false;
 907                         cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
 908                 } else {
 909                         cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
 910                 }
 911         }
 912         return 0;
 913 }
 914 #endif
 915 
 916 static unsigned int edge_startup(struct irq_data *data)
 917 {
 918         /* ack any pending edge-irq at startup, so there is
 919          * an _edge_ to fire on when the event reappears.
 920          */
 921         data->chip->irq_ack(data);
 922         data->chip->irq_enable(data);
 923         return 0;
 924 }
 925 
 926 /*
 927  * Newer octeon chips have support for lockless CIU operation.
 928  */
 929 static struct irq_chip octeon_irq_chip_ciu_v2 = {
 930         .name = "CIU",
 931         .irq_enable = octeon_irq_ciu_enable_v2,
 932         .irq_disable = octeon_irq_ciu_disable_all_v2,
 933         .irq_mask = octeon_irq_ciu_disable_local_v2,
 934         .irq_unmask = octeon_irq_ciu_enable_v2,
 935 #ifdef CONFIG_SMP
 936         .irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
 937         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
 938 #endif
 939 };
 940 
 941 static struct irq_chip octeon_irq_chip_ciu_v2_edge = {
 942         .name = "CIU",
 943         .irq_enable = octeon_irq_ciu_enable_v2,
 944         .irq_disable = octeon_irq_ciu_disable_all_v2,
 945         .irq_ack = octeon_irq_ciu_ack,
 946         .irq_mask = octeon_irq_ciu_disable_local_v2,
 947         .irq_unmask = octeon_irq_ciu_enable_v2,
 948 #ifdef CONFIG_SMP
 949         .irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
 950         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
 951 #endif
 952 };
 953 
 954 /*
 955  * Newer octeon chips have support for lockless CIU operation.
 956  */
 957 static struct irq_chip octeon_irq_chip_ciu_sum2 = {
 958         .name = "CIU",
 959         .irq_enable = octeon_irq_ciu_enable_sum2,
 960         .irq_disable = octeon_irq_ciu_disable_all_sum2,
 961         .irq_mask = octeon_irq_ciu_disable_local_sum2,
 962         .irq_unmask = octeon_irq_ciu_enable_sum2,
 963 #ifdef CONFIG_SMP
 964         .irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
 965         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
 966 #endif
 967 };
 968 
 969 static struct irq_chip octeon_irq_chip_ciu_sum2_edge = {
 970         .name = "CIU",
 971         .irq_enable = octeon_irq_ciu_enable_sum2,
 972         .irq_disable = octeon_irq_ciu_disable_all_sum2,
 973         .irq_ack = octeon_irq_ciu_ack_sum2,
 974         .irq_mask = octeon_irq_ciu_disable_local_sum2,
 975         .irq_unmask = octeon_irq_ciu_enable_sum2,
 976 #ifdef CONFIG_SMP
 977         .irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
 978         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
 979 #endif
 980 };
 981 
 982 static struct irq_chip octeon_irq_chip_ciu = {
 983         .name = "CIU",
 984         .irq_enable = octeon_irq_ciu_enable,
 985         .irq_disable = octeon_irq_ciu_disable_all,
 986         .irq_mask = octeon_irq_ciu_disable_local,
 987         .irq_unmask = octeon_irq_ciu_enable,
 988 #ifdef CONFIG_SMP
 989         .irq_set_affinity = octeon_irq_ciu_set_affinity,
 990         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
 991 #endif
 992 };
 993 
 994 static struct irq_chip octeon_irq_chip_ciu_edge = {
 995         .name = "CIU",
 996         .irq_enable = octeon_irq_ciu_enable,
 997         .irq_disable = octeon_irq_ciu_disable_all,
 998         .irq_ack = octeon_irq_ciu_ack,
 999         .irq_mask = octeon_irq_ciu_disable_local,
1000         .irq_unmask = octeon_irq_ciu_enable,
1001 #ifdef CONFIG_SMP
1002         .irq_set_affinity = octeon_irq_ciu_set_affinity,
1003         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1004 #endif
1005 };
1006 
1007 /* The mbox versions don't do any affinity or round-robin. */
1008 static struct irq_chip octeon_irq_chip_ciu_mbox_v2 = {
1009         .name = "CIU-M",
1010         .irq_enable = octeon_irq_ciu_enable_all_v2,
1011         .irq_disable = octeon_irq_ciu_disable_all_v2,
1012         .irq_ack = octeon_irq_ciu_disable_local_v2,
1013         .irq_eoi = octeon_irq_ciu_enable_local_v2,
1014 
1015         .irq_cpu_online = octeon_irq_ciu_enable_local_v2,
1016         .irq_cpu_offline = octeon_irq_ciu_disable_local_v2,
1017         .flags = IRQCHIP_ONOFFLINE_ENABLED,
1018 };
1019 
1020 static struct irq_chip octeon_irq_chip_ciu_mbox = {
1021         .name = "CIU-M",
1022         .irq_enable = octeon_irq_ciu_enable_all,
1023         .irq_disable = octeon_irq_ciu_disable_all,
1024         .irq_ack = octeon_irq_ciu_disable_local,
1025         .irq_eoi = octeon_irq_ciu_enable_local,
1026 
1027         .irq_cpu_online = octeon_irq_ciu_enable_local,
1028         .irq_cpu_offline = octeon_irq_ciu_disable_local,
1029         .flags = IRQCHIP_ONOFFLINE_ENABLED,
1030 };
1031 
1032 static struct irq_chip octeon_irq_chip_ciu_gpio_v2 = {
1033         .name = "CIU-GPIO",
1034         .irq_enable = octeon_irq_ciu_enable_gpio_v2,
1035         .irq_disable = octeon_irq_ciu_disable_gpio_v2,
1036         .irq_ack = octeon_irq_ciu_gpio_ack,
1037         .irq_mask = octeon_irq_ciu_disable_local_v2,
1038         .irq_unmask = octeon_irq_ciu_enable_v2,
1039         .irq_set_type = octeon_irq_ciu_gpio_set_type,
1040 #ifdef CONFIG_SMP
1041         .irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
1042         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1043 #endif
1044         .flags = IRQCHIP_SET_TYPE_MASKED,
1045 };
1046 
1047 static struct irq_chip octeon_irq_chip_ciu_gpio = {
1048         .name = "CIU-GPIO",
1049         .irq_enable = octeon_irq_ciu_enable_gpio,
1050         .irq_disable = octeon_irq_ciu_disable_gpio,
1051         .irq_mask = octeon_irq_ciu_disable_local,
1052         .irq_unmask = octeon_irq_ciu_enable,
1053         .irq_ack = octeon_irq_ciu_gpio_ack,
1054         .irq_set_type = octeon_irq_ciu_gpio_set_type,
1055 #ifdef CONFIG_SMP
1056         .irq_set_affinity = octeon_irq_ciu_set_affinity,
1057         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1058 #endif
1059         .flags = IRQCHIP_SET_TYPE_MASKED,
1060 };
1061 
1062 /*
1063  * Watchdog interrupts are special.  They are associated with a single
1064  * core, so we hardwire the affinity to that core.
1065  */
1066 static void octeon_irq_ciu_wd_enable(struct irq_data *data)
1067 {
1068         unsigned long flags;
1069         unsigned long *pen;
1070         int coreid = data->irq - OCTEON_IRQ_WDOG0;      /* Bit 0-63 of EN1 */
1071         int cpu = octeon_cpu_for_coreid(coreid);
1072         raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
1073 
1074         raw_spin_lock_irqsave(lock, flags);
1075         pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
1076         __set_bit(coreid, pen);
1077         /*
1078          * Must be visible to octeon_irq_ip{2,3}_ciu() before enabling
1079          * the irq.
1080          */
1081         wmb();
1082         cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
1083         raw_spin_unlock_irqrestore(lock, flags);
1084 }
1085 
1086 /*
1087  * Watchdog interrupts are special.  They are associated with a single
1088  * core, so we hardwire the affinity to that core.
1089  */
1090 static void octeon_irq_ciu1_wd_enable_v2(struct irq_data *data)
1091 {
1092         int coreid = data->irq - OCTEON_IRQ_WDOG0;
1093         int cpu = octeon_cpu_for_coreid(coreid);
1094 
1095         set_bit(coreid, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
1096         cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(coreid * 2 + 1), 1ull << coreid);
1097 }
1098 
1099 
1100 static struct irq_chip octeon_irq_chip_ciu_wd_v2 = {
1101         .name = "CIU-W",
1102         .irq_enable = octeon_irq_ciu1_wd_enable_v2,
1103         .irq_disable = octeon_irq_ciu_disable_all_v2,
1104         .irq_mask = octeon_irq_ciu_disable_local_v2,
1105         .irq_unmask = octeon_irq_ciu_enable_local_v2,
1106 };
1107 
1108 static struct irq_chip octeon_irq_chip_ciu_wd = {
1109         .name = "CIU-W",
1110         .irq_enable = octeon_irq_ciu_wd_enable,
1111         .irq_disable = octeon_irq_ciu_disable_all,
1112         .irq_mask = octeon_irq_ciu_disable_local,
1113         .irq_unmask = octeon_irq_ciu_enable_local,
1114 };
1115 
1116 static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit)
1117 {
1118         bool edge = false;
1119 
1120         if (line == 0)
1121                 switch (bit) {
1122                 case 48 ... 49: /* GMX DRP */
1123                 case 50: /* IPD_DRP */
1124                 case 52 ... 55: /* Timers */
1125                 case 58: /* MPI */
1126                         edge = true;
1127                         break;
1128                 default:
1129                         break;
1130                 }
1131         else /* line == 1 */
1132                 switch (bit) {
1133                 case 47: /* PTP */
1134                         edge = true;
1135                         break;
1136                 default:
1137                         break;
1138                 }
1139         return edge;
1140 }
1141 
1142 struct octeon_irq_gpio_domain_data {
1143         unsigned int base_hwirq;
1144 };
1145 
1146 static int octeon_irq_gpio_xlat(struct irq_domain *d,
1147                                 struct device_node *node,
1148                                 const u32 *intspec,
1149                                 unsigned int intsize,
1150                                 unsigned long *out_hwirq,
1151                                 unsigned int *out_type)
1152 {
1153         unsigned int type;
1154         unsigned int pin;
1155         unsigned int trigger;
1156 
1157         if (irq_domain_get_of_node(d) != node)
1158                 return -EINVAL;
1159 
1160         if (intsize < 2)
1161                 return -EINVAL;
1162 
1163         pin = intspec[0];
1164         if (pin >= 16)
1165                 return -EINVAL;
1166 
1167         trigger = intspec[1];
1168 
1169         switch (trigger) {
1170         case 1:
1171                 type = IRQ_TYPE_EDGE_RISING;
1172                 break;
1173         case 2:
1174                 type = IRQ_TYPE_EDGE_FALLING;
1175                 break;
1176         case 4:
1177                 type = IRQ_TYPE_LEVEL_HIGH;
1178                 break;
1179         case 8:
1180                 type = IRQ_TYPE_LEVEL_LOW;
1181                 break;
1182         default:
1183                 pr_err("Error: (%pOFn) Invalid irq trigger specification: %x\n",
1184                        node,
1185                        trigger);
1186                 type = IRQ_TYPE_LEVEL_LOW;
1187                 break;
1188         }
1189         *out_type = type;
1190         *out_hwirq = pin;
1191 
1192         return 0;
1193 }
1194 
1195 static int octeon_irq_ciu_xlat(struct irq_domain *d,
1196                                struct device_node *node,
1197                                const u32 *intspec,
1198                                unsigned int intsize,
1199                                unsigned long *out_hwirq,
1200                                unsigned int *out_type)
1201 {
1202         unsigned int ciu, bit;
1203         struct octeon_irq_ciu_domain_data *dd = d->host_data;
1204 
1205         ciu = intspec[0];
1206         bit = intspec[1];
1207 
1208         if (ciu >= dd->num_sum || bit > 63)
1209                 return -EINVAL;
1210 
1211         *out_hwirq = (ciu << 6) | bit;
1212         *out_type = 0;
1213 
1214         return 0;
1215 }
1216 
1217 static struct irq_chip *octeon_irq_ciu_chip;
1218 static struct irq_chip *octeon_irq_ciu_chip_edge;
1219 static struct irq_chip *octeon_irq_gpio_chip;
1220 
1221 static int octeon_irq_ciu_map(struct irq_domain *d,
1222                               unsigned int virq, irq_hw_number_t hw)
1223 {
1224         int rv;
1225         unsigned int line = hw >> 6;
1226         unsigned int bit = hw & 63;
1227         struct octeon_irq_ciu_domain_data *dd = d->host_data;
1228 
1229         if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0)
1230                 return -EINVAL;
1231 
1232         if (line == 2) {
1233                 if (octeon_irq_ciu_is_edge(line, bit))
1234                         rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1235                                 &octeon_irq_chip_ciu_sum2_edge,
1236                                 handle_edge_irq);
1237                 else
1238                         rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1239                                 &octeon_irq_chip_ciu_sum2,
1240                                 handle_level_irq);
1241         } else {
1242                 if (octeon_irq_ciu_is_edge(line, bit))
1243                         rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1244                                 octeon_irq_ciu_chip_edge,
1245                                 handle_edge_irq);
1246                 else
1247                         rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1248                                 octeon_irq_ciu_chip,
1249                                 handle_level_irq);
1250         }
1251         return rv;
1252 }
1253 
1254 static int octeon_irq_gpio_map(struct irq_domain *d,
1255                                unsigned int virq, irq_hw_number_t hw)
1256 {
1257         struct octeon_irq_gpio_domain_data *gpiod = d->host_data;
1258         unsigned int line, bit;
1259         int r;
1260 
1261         line = (hw + gpiod->base_hwirq) >> 6;
1262         bit = (hw + gpiod->base_hwirq) & 63;
1263         if (line >= ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
1264                 octeon_irq_ciu_to_irq[line][bit] != 0)
1265                 return -EINVAL;
1266 
1267         /*
1268          * Default to handle_level_irq. If the DT contains a different
1269          * trigger type, it will call the irq_set_type callback and
1270          * the handler gets updated.
1271          */
1272         r = octeon_irq_set_ciu_mapping(virq, line, bit, hw,
1273                                        octeon_irq_gpio_chip, handle_level_irq);
1274         return r;
1275 }
1276 
1277 static struct irq_domain_ops octeon_irq_domain_ciu_ops = {
1278         .map = octeon_irq_ciu_map,
1279         .unmap = octeon_irq_free_cd,
1280         .xlate = octeon_irq_ciu_xlat,
1281 };
1282 
1283 static struct irq_domain_ops octeon_irq_domain_gpio_ops = {
1284         .map = octeon_irq_gpio_map,
1285         .unmap = octeon_irq_free_cd,
1286         .xlate = octeon_irq_gpio_xlat,
1287 };
1288 
1289 static void octeon_irq_ip2_ciu(void)
1290 {
1291         const unsigned long core_id = cvmx_get_core_num();
1292         u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2));
1293 
1294         ciu_sum &= __this_cpu_read(octeon_irq_ciu0_en_mirror);
1295         if (likely(ciu_sum)) {
1296                 int bit = fls64(ciu_sum) - 1;
1297                 int irq = octeon_irq_ciu_to_irq[0][bit];
1298                 if (likely(irq))
1299                         do_IRQ(irq);
1300                 else
1301                         spurious_interrupt();
1302         } else {
1303                 spurious_interrupt();
1304         }
1305 }
1306 
1307 static void octeon_irq_ip3_ciu(void)
1308 {
1309         u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
1310 
1311         ciu_sum &= __this_cpu_read(octeon_irq_ciu1_en_mirror);
1312         if (likely(ciu_sum)) {
1313                 int bit = fls64(ciu_sum) - 1;
1314                 int irq = octeon_irq_ciu_to_irq[1][bit];
1315                 if (likely(irq))
1316                         do_IRQ(irq);
1317                 else
1318                         spurious_interrupt();
1319         } else {
1320                 spurious_interrupt();
1321         }
1322 }
1323 
1324 static void octeon_irq_ip4_ciu(void)
1325 {
1326         int coreid = cvmx_get_core_num();
1327         u64 ciu_sum = cvmx_read_csr(CVMX_CIU_SUM2_PPX_IP4(coreid));
1328         u64 ciu_en = cvmx_read_csr(CVMX_CIU_EN2_PPX_IP4(coreid));
1329 
1330         ciu_sum &= ciu_en;
1331         if (likely(ciu_sum)) {
1332                 int bit = fls64(ciu_sum) - 1;
1333                 int irq = octeon_irq_ciu_to_irq[2][bit];
1334 
1335                 if (likely(irq))
1336                         do_IRQ(irq);
1337                 else
1338                         spurious_interrupt();
1339         } else {
1340                 spurious_interrupt();
1341         }
1342 }
1343 
1344 static bool octeon_irq_use_ip4;
1345 
1346 static void octeon_irq_local_enable_ip4(void *arg)
1347 {
1348         set_c0_status(STATUSF_IP4);
1349 }
1350 
1351 static void octeon_irq_ip4_mask(void)
1352 {
1353         clear_c0_status(STATUSF_IP4);
1354         spurious_interrupt();
1355 }
1356 
1357 static void (*octeon_irq_ip2)(void);
1358 static void (*octeon_irq_ip3)(void);
1359 static void (*octeon_irq_ip4)(void);
1360 
1361 void (*octeon_irq_setup_secondary)(void);
1362 
1363 void octeon_irq_set_ip4_handler(octeon_irq_ip4_handler_t h)
1364 {
1365         octeon_irq_ip4 = h;
1366         octeon_irq_use_ip4 = true;
1367         on_each_cpu(octeon_irq_local_enable_ip4, NULL, 1);
1368 }
1369 
1370 static void octeon_irq_percpu_enable(void)
1371 {
1372         irq_cpu_online();
1373 }
1374 
1375 static void octeon_irq_init_ciu_percpu(void)
1376 {
1377         int coreid = cvmx_get_core_num();
1378 
1379 
1380         __this_cpu_write(octeon_irq_ciu0_en_mirror, 0);
1381         __this_cpu_write(octeon_irq_ciu1_en_mirror, 0);
1382         wmb();
1383         raw_spin_lock_init(this_cpu_ptr(&octeon_irq_ciu_spinlock));
1384         /*
1385          * Disable All CIU Interrupts. The ones we need will be
1386          * enabled later.  Read the SUM register so we know the write
1387          * completed.
1388          */
1389         cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0);
1390         cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0);
1391         cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0);
1392         cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0);
1393         cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2)));
1394 }
1395 
1396 static void octeon_irq_init_ciu2_percpu(void)
1397 {
1398         u64 regx, ipx;
1399         int coreid = cvmx_get_core_num();
1400         u64 base = CVMX_CIU2_EN_PPX_IP2_WRKQ(coreid);
1401 
1402         /*
1403          * Disable All CIU2 Interrupts. The ones we need will be
1404          * enabled later.  Read the SUM register so we know the write
1405          * completed.
1406          *
1407          * There are 9 registers and 3 IPX levels with strides 0x1000
1408          * and 0x200 respectivly.  Use loops to clear them.
1409          */
1410         for (regx = 0; regx <= 0x8000; regx += 0x1000) {
1411                 for (ipx = 0; ipx <= 0x400; ipx += 0x200)
1412                         cvmx_write_csr(base + regx + ipx, 0);
1413         }
1414 
1415         cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(coreid));
1416 }
1417 
1418 static void octeon_irq_setup_secondary_ciu(void)
1419 {
1420         octeon_irq_init_ciu_percpu();
1421         octeon_irq_percpu_enable();
1422 
1423         /* Enable the CIU lines */
1424         set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1425         if (octeon_irq_use_ip4)
1426                 set_c0_status(STATUSF_IP4);
1427         else
1428                 clear_c0_status(STATUSF_IP4);
1429 }
1430 
1431 static void octeon_irq_setup_secondary_ciu2(void)
1432 {
1433         octeon_irq_init_ciu2_percpu();
1434         octeon_irq_percpu_enable();
1435 
1436         /* Enable the CIU lines */
1437         set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1438         if (octeon_irq_use_ip4)
1439                 set_c0_status(STATUSF_IP4);
1440         else
1441                 clear_c0_status(STATUSF_IP4);
1442 }
1443 
1444 static int __init octeon_irq_init_ciu(
1445         struct device_node *ciu_node, struct device_node *parent)
1446 {
1447         unsigned int i, r;
1448         struct irq_chip *chip;
1449         struct irq_chip *chip_edge;
1450         struct irq_chip *chip_mbox;
1451         struct irq_chip *chip_wd;
1452         struct irq_domain *ciu_domain = NULL;
1453         struct octeon_irq_ciu_domain_data *dd;
1454 
1455         dd = kzalloc(sizeof(*dd), GFP_KERNEL);
1456         if (!dd)
1457                 return -ENOMEM;
1458 
1459         octeon_irq_init_ciu_percpu();
1460         octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu;
1461 
1462         octeon_irq_ip2 = octeon_irq_ip2_ciu;
1463         octeon_irq_ip3 = octeon_irq_ip3_ciu;
1464         if ((OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3())
1465                 && !OCTEON_IS_MODEL(OCTEON_CN63XX)) {
1466                 octeon_irq_ip4 =  octeon_irq_ip4_ciu;
1467                 dd->num_sum = 3;
1468                 octeon_irq_use_ip4 = true;
1469         } else {
1470                 octeon_irq_ip4 = octeon_irq_ip4_mask;
1471                 dd->num_sum = 2;
1472                 octeon_irq_use_ip4 = false;
1473         }
1474         if (OCTEON_IS_MODEL(OCTEON_CN58XX_PASS2_X) ||
1475             OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
1476             OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) ||
1477             OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3()) {
1478                 chip = &octeon_irq_chip_ciu_v2;
1479                 chip_edge = &octeon_irq_chip_ciu_v2_edge;
1480                 chip_mbox = &octeon_irq_chip_ciu_mbox_v2;
1481                 chip_wd = &octeon_irq_chip_ciu_wd_v2;
1482                 octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio_v2;
1483         } else {
1484                 chip = &octeon_irq_chip_ciu;
1485                 chip_edge = &octeon_irq_chip_ciu_edge;
1486                 chip_mbox = &octeon_irq_chip_ciu_mbox;
1487                 chip_wd = &octeon_irq_chip_ciu_wd;
1488                 octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio;
1489         }
1490         octeon_irq_ciu_chip = chip;
1491         octeon_irq_ciu_chip_edge = chip_edge;
1492 
1493         /* Mips internal */
1494         octeon_irq_init_core();
1495 
1496         ciu_domain = irq_domain_add_tree(
1497                 ciu_node, &octeon_irq_domain_ciu_ops, dd);
1498         irq_set_default_host(ciu_domain);
1499 
1500         /* CIU_0 */
1501         for (i = 0; i < 16; i++) {
1502                 r = octeon_irq_force_ciu_mapping(
1503                         ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 0);
1504                 if (r)
1505                         goto err;
1506         }
1507 
1508         r = octeon_irq_set_ciu_mapping(
1509                 OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq);
1510         if (r)
1511                 goto err;
1512         r = octeon_irq_set_ciu_mapping(
1513                 OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq);
1514         if (r)
1515                 goto err;
1516 
1517         for (i = 0; i < 4; i++) {
1518                 r = octeon_irq_force_ciu_mapping(
1519                         ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36);
1520                 if (r)
1521                         goto err;
1522         }
1523         for (i = 0; i < 4; i++) {
1524                 r = octeon_irq_force_ciu_mapping(
1525                         ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40);
1526                 if (r)
1527                         goto err;
1528         }
1529 
1530         r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45);
1531         if (r)
1532                 goto err;
1533 
1534         r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46);
1535         if (r)
1536                 goto err;
1537 
1538         for (i = 0; i < 4; i++) {
1539                 r = octeon_irq_force_ciu_mapping(
1540                         ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52);
1541                 if (r)
1542                         goto err;
1543         }
1544 
1545         r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59);
1546         if (r)
1547                 goto err;
1548 
1549         /* CIU_1 */
1550         for (i = 0; i < 16; i++) {
1551                 r = octeon_irq_set_ciu_mapping(
1552                         i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd,
1553                         handle_level_irq);
1554                 if (r)
1555                         goto err;
1556         }
1557 
1558         /* Enable the CIU lines */
1559         set_c0_status(STATUSF_IP3 | STATUSF_IP2);
1560         if (octeon_irq_use_ip4)
1561                 set_c0_status(STATUSF_IP4);
1562         else
1563                 clear_c0_status(STATUSF_IP4);
1564 
1565         return 0;
1566 err:
1567         return r;
1568 }
1569 
1570 static int __init octeon_irq_init_gpio(
1571         struct device_node *gpio_node, struct device_node *parent)
1572 {
1573         struct octeon_irq_gpio_domain_data *gpiod;
1574         u32 interrupt_cells;
1575         unsigned int base_hwirq;
1576         int r;
1577 
1578         r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells);
1579         if (r)
1580                 return r;
1581 
1582         if (interrupt_cells == 1) {
1583                 u32 v;
1584 
1585                 r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v);
1586                 if (r) {
1587                         pr_warn("No \"interrupts\" property.\n");
1588                         return r;
1589                 }
1590                 base_hwirq = v;
1591         } else if (interrupt_cells == 2) {
1592                 u32 v0, v1;
1593 
1594                 r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0);
1595                 if (r) {
1596                         pr_warn("No \"interrupts\" property.\n");
1597                         return r;
1598                 }
1599                 r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1);
1600                 if (r) {
1601                         pr_warn("No \"interrupts\" property.\n");
1602                         return r;
1603                 }
1604                 base_hwirq = (v0 << 6) | v1;
1605         } else {
1606                 pr_warn("Bad \"#interrupt-cells\" property: %u\n",
1607                         interrupt_cells);
1608                 return -EINVAL;
1609         }
1610 
1611         gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL);
1612         if (gpiod) {
1613                 /* gpio domain host_data is the base hwirq number. */
1614                 gpiod->base_hwirq = base_hwirq;
1615                 irq_domain_add_linear(
1616                         gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod);
1617         } else {
1618                 pr_warn("Cannot allocate memory for GPIO irq_domain.\n");
1619                 return -ENOMEM;
1620         }
1621 
1622         /*
1623          * Clear the OF_POPULATED flag that was set by of_irq_init()
1624          * so that all GPIO devices will be probed.
1625          */
1626         of_node_clear_flag(gpio_node, OF_POPULATED);
1627 
1628         return 0;
1629 }
1630 /*
1631  * Watchdog interrupts are special.  They are associated with a single
1632  * core, so we hardwire the affinity to that core.
1633  */
1634 static void octeon_irq_ciu2_wd_enable(struct irq_data *data)
1635 {
1636         u64 mask;
1637         u64 en_addr;
1638         int coreid = data->irq - OCTEON_IRQ_WDOG0;
1639         struct octeon_ciu_chip_data *cd;
1640 
1641         cd = irq_data_get_irq_chip_data(data);
1642         mask = 1ull << (cd->bit);
1643 
1644         en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1645                 (0x1000ull * cd->line);
1646         cvmx_write_csr(en_addr, mask);
1647 
1648 }
1649 
1650 static void octeon_irq_ciu2_enable(struct irq_data *data)
1651 {
1652         u64 mask;
1653         u64 en_addr;
1654         int cpu = next_cpu_for_irq(data);
1655         int coreid = octeon_coreid_for_cpu(cpu);
1656         struct octeon_ciu_chip_data *cd;
1657 
1658         cd = irq_data_get_irq_chip_data(data);
1659         mask = 1ull << (cd->bit);
1660 
1661         en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1662                 (0x1000ull * cd->line);
1663         cvmx_write_csr(en_addr, mask);
1664 }
1665 
1666 static void octeon_irq_ciu2_enable_local(struct irq_data *data)
1667 {
1668         u64 mask;
1669         u64 en_addr;
1670         int coreid = cvmx_get_core_num();
1671         struct octeon_ciu_chip_data *cd;
1672 
1673         cd = irq_data_get_irq_chip_data(data);
1674         mask = 1ull << (cd->bit);
1675 
1676         en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
1677                 (0x1000ull * cd->line);
1678         cvmx_write_csr(en_addr, mask);
1679 
1680 }
1681 
1682 static void octeon_irq_ciu2_disable_local(struct irq_data *data)
1683 {
1684         u64 mask;
1685         u64 en_addr;
1686         int coreid = cvmx_get_core_num();
1687         struct octeon_ciu_chip_data *cd;
1688 
1689         cd = irq_data_get_irq_chip_data(data);
1690         mask = 1ull << (cd->bit);
1691 
1692         en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) +
1693                 (0x1000ull * cd->line);
1694         cvmx_write_csr(en_addr, mask);
1695 
1696 }
1697 
1698 static void octeon_irq_ciu2_ack(struct irq_data *data)
1699 {
1700         u64 mask;
1701         u64 en_addr;
1702         int coreid = cvmx_get_core_num();
1703         struct octeon_ciu_chip_data *cd;
1704 
1705         cd = irq_data_get_irq_chip_data(data);
1706         mask = 1ull << (cd->bit);
1707 
1708         en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line);
1709         cvmx_write_csr(en_addr, mask);
1710 
1711 }
1712 
1713 static void octeon_irq_ciu2_disable_all(struct irq_data *data)
1714 {
1715         int cpu;
1716         u64 mask;
1717         struct octeon_ciu_chip_data *cd;
1718 
1719         cd = irq_data_get_irq_chip_data(data);
1720         mask = 1ull << (cd->bit);
1721 
1722         for_each_online_cpu(cpu) {
1723                 u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
1724                         octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line);
1725                 cvmx_write_csr(en_addr, mask);
1726         }
1727 }
1728 
1729 static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data)
1730 {
1731         int cpu;
1732         u64 mask;
1733 
1734         mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1735 
1736         for_each_online_cpu(cpu) {
1737                 u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(
1738                         octeon_coreid_for_cpu(cpu));
1739                 cvmx_write_csr(en_addr, mask);
1740         }
1741 }
1742 
1743 static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data)
1744 {
1745         int cpu;
1746         u64 mask;
1747 
1748         mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1749 
1750         for_each_online_cpu(cpu) {
1751                 u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(
1752                         octeon_coreid_for_cpu(cpu));
1753                 cvmx_write_csr(en_addr, mask);
1754         }
1755 }
1756 
1757 static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data)
1758 {
1759         u64 mask;
1760         u64 en_addr;
1761         int coreid = cvmx_get_core_num();
1762 
1763         mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1764         en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid);
1765         cvmx_write_csr(en_addr, mask);
1766 }
1767 
1768 static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data)
1769 {
1770         u64 mask;
1771         u64 en_addr;
1772         int coreid = cvmx_get_core_num();
1773 
1774         mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
1775         en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid);
1776         cvmx_write_csr(en_addr, mask);
1777 }
1778 
1779 #ifdef CONFIG_SMP
1780 static int octeon_irq_ciu2_set_affinity(struct irq_data *data,
1781                                         const struct cpumask *dest, bool force)
1782 {
1783         int cpu;
1784         bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
1785         u64 mask;
1786         struct octeon_ciu_chip_data *cd;
1787 
1788         if (!enable_one)
1789                 return 0;
1790 
1791         cd = irq_data_get_irq_chip_data(data);
1792         mask = 1ull << cd->bit;
1793 
1794         for_each_online_cpu(cpu) {
1795                 u64 en_addr;
1796                 if (cpumask_test_cpu(cpu, dest) && enable_one) {
1797                         enable_one = false;
1798                         en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(
1799                                 octeon_coreid_for_cpu(cpu)) +
1800                                 (0x1000ull * cd->line);
1801                 } else {
1802                         en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
1803                                 octeon_coreid_for_cpu(cpu)) +
1804                                 (0x1000ull * cd->line);
1805                 }
1806                 cvmx_write_csr(en_addr, mask);
1807         }
1808 
1809         return 0;
1810 }
1811 #endif
1812 
1813 static void octeon_irq_ciu2_enable_gpio(struct irq_data *data)
1814 {
1815         octeon_irq_gpio_setup(data);
1816         octeon_irq_ciu2_enable(data);
1817 }
1818 
1819 static void octeon_irq_ciu2_disable_gpio(struct irq_data *data)
1820 {
1821         struct octeon_ciu_chip_data *cd;
1822 
1823         cd = irq_data_get_irq_chip_data(data);
1824 
1825         cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
1826 
1827         octeon_irq_ciu2_disable_all(data);
1828 }
1829 
1830 static struct irq_chip octeon_irq_chip_ciu2 = {
1831         .name = "CIU2-E",
1832         .irq_enable = octeon_irq_ciu2_enable,
1833         .irq_disable = octeon_irq_ciu2_disable_all,
1834         .irq_mask = octeon_irq_ciu2_disable_local,
1835         .irq_unmask = octeon_irq_ciu2_enable,
1836 #ifdef CONFIG_SMP
1837         .irq_set_affinity = octeon_irq_ciu2_set_affinity,
1838         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1839 #endif
1840 };
1841 
1842 static struct irq_chip octeon_irq_chip_ciu2_edge = {
1843         .name = "CIU2-E",
1844         .irq_enable = octeon_irq_ciu2_enable,
1845         .irq_disable = octeon_irq_ciu2_disable_all,
1846         .irq_ack = octeon_irq_ciu2_ack,
1847         .irq_mask = octeon_irq_ciu2_disable_local,
1848         .irq_unmask = octeon_irq_ciu2_enable,
1849 #ifdef CONFIG_SMP
1850         .irq_set_affinity = octeon_irq_ciu2_set_affinity,
1851         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1852 #endif
1853 };
1854 
1855 static struct irq_chip octeon_irq_chip_ciu2_mbox = {
1856         .name = "CIU2-M",
1857         .irq_enable = octeon_irq_ciu2_mbox_enable_all,
1858         .irq_disable = octeon_irq_ciu2_mbox_disable_all,
1859         .irq_ack = octeon_irq_ciu2_mbox_disable_local,
1860         .irq_eoi = octeon_irq_ciu2_mbox_enable_local,
1861 
1862         .irq_cpu_online = octeon_irq_ciu2_mbox_enable_local,
1863         .irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local,
1864         .flags = IRQCHIP_ONOFFLINE_ENABLED,
1865 };
1866 
1867 static struct irq_chip octeon_irq_chip_ciu2_wd = {
1868         .name = "CIU2-W",
1869         .irq_enable = octeon_irq_ciu2_wd_enable,
1870         .irq_disable = octeon_irq_ciu2_disable_all,
1871         .irq_mask = octeon_irq_ciu2_disable_local,
1872         .irq_unmask = octeon_irq_ciu2_enable_local,
1873 };
1874 
1875 static struct irq_chip octeon_irq_chip_ciu2_gpio = {
1876         .name = "CIU-GPIO",
1877         .irq_enable = octeon_irq_ciu2_enable_gpio,
1878         .irq_disable = octeon_irq_ciu2_disable_gpio,
1879         .irq_ack = octeon_irq_ciu_gpio_ack,
1880         .irq_mask = octeon_irq_ciu2_disable_local,
1881         .irq_unmask = octeon_irq_ciu2_enable,
1882         .irq_set_type = octeon_irq_ciu_gpio_set_type,
1883 #ifdef CONFIG_SMP
1884         .irq_set_affinity = octeon_irq_ciu2_set_affinity,
1885         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
1886 #endif
1887         .flags = IRQCHIP_SET_TYPE_MASKED,
1888 };
1889 
1890 static int octeon_irq_ciu2_xlat(struct irq_domain *d,
1891                                 struct device_node *node,
1892                                 const u32 *intspec,
1893                                 unsigned int intsize,
1894                                 unsigned long *out_hwirq,
1895                                 unsigned int *out_type)
1896 {
1897         unsigned int ciu, bit;
1898 
1899         ciu = intspec[0];
1900         bit = intspec[1];
1901 
1902         *out_hwirq = (ciu << 6) | bit;
1903         *out_type = 0;
1904 
1905         return 0;
1906 }
1907 
1908 static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit)
1909 {
1910         bool edge = false;
1911 
1912         if (line == 3) /* MIO */
1913                 switch (bit) {
1914                 case 2:  /* IPD_DRP */
1915                 case 8 ... 11: /* Timers */
1916                 case 48: /* PTP */
1917                         edge = true;
1918                         break;
1919                 default:
1920                         break;
1921                 }
1922         else if (line == 6) /* PKT */
1923                 switch (bit) {
1924                 case 52 ... 53: /* ILK_DRP */
1925                 case 8 ... 12:  /* GMX_DRP */
1926                         edge = true;
1927                         break;
1928                 default:
1929                         break;
1930                 }
1931         return edge;
1932 }
1933 
1934 static int octeon_irq_ciu2_map(struct irq_domain *d,
1935                                unsigned int virq, irq_hw_number_t hw)
1936 {
1937         unsigned int line = hw >> 6;
1938         unsigned int bit = hw & 63;
1939 
1940         /*
1941          * Don't map irq if it is reserved for GPIO.
1942          * (Line 7 are the GPIO lines.)
1943          */
1944         if (line == 7)
1945                 return 0;
1946 
1947         if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0)
1948                 return -EINVAL;
1949 
1950         if (octeon_irq_ciu2_is_edge(line, bit))
1951                 octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1952                                            &octeon_irq_chip_ciu2_edge,
1953                                            handle_edge_irq);
1954         else
1955                 octeon_irq_set_ciu_mapping(virq, line, bit, 0,
1956                                            &octeon_irq_chip_ciu2,
1957                                            handle_level_irq);
1958 
1959         return 0;
1960 }
1961 
1962 static struct irq_domain_ops octeon_irq_domain_ciu2_ops = {
1963         .map = octeon_irq_ciu2_map,
1964         .unmap = octeon_irq_free_cd,
1965         .xlate = octeon_irq_ciu2_xlat,
1966 };
1967 
1968 static void octeon_irq_ciu2(void)
1969 {
1970         int line;
1971         int bit;
1972         int irq;
1973         u64 src_reg, src, sum;
1974         const unsigned long core_id = cvmx_get_core_num();
1975 
1976         sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful;
1977 
1978         if (unlikely(!sum))
1979                 goto spurious;
1980 
1981         line = fls64(sum) - 1;
1982         src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line);
1983         src = cvmx_read_csr(src_reg);
1984 
1985         if (unlikely(!src))
1986                 goto spurious;
1987 
1988         bit = fls64(src) - 1;
1989         irq = octeon_irq_ciu_to_irq[line][bit];
1990         if (unlikely(!irq))
1991                 goto spurious;
1992 
1993         do_IRQ(irq);
1994         goto out;
1995 
1996 spurious:
1997         spurious_interrupt();
1998 out:
1999         /* CN68XX pass 1.x has an errata that accessing the ACK registers
2000                 can stop interrupts from propagating */
2001         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
2002                 cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
2003         else
2004                 cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id));
2005         return;
2006 }
2007 
2008 static void octeon_irq_ciu2_mbox(void)
2009 {
2010         int line;
2011 
2012         const unsigned long core_id = cvmx_get_core_num();
2013         u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60;
2014 
2015         if (unlikely(!sum))
2016                 goto spurious;
2017 
2018         line = fls64(sum) - 1;
2019 
2020         do_IRQ(OCTEON_IRQ_MBOX0 + line);
2021         goto out;
2022 
2023 spurious:
2024         spurious_interrupt();
2025 out:
2026         /* CN68XX pass 1.x has an errata that accessing the ACK registers
2027                 can stop interrupts from propagating */
2028         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
2029                 cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
2030         else
2031                 cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id));
2032         return;
2033 }
2034 
2035 static int __init octeon_irq_init_ciu2(
2036         struct device_node *ciu_node, struct device_node *parent)
2037 {
2038         unsigned int i, r;
2039         struct irq_domain *ciu_domain = NULL;
2040 
2041         octeon_irq_init_ciu2_percpu();
2042         octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2;
2043 
2044         octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio;
2045         octeon_irq_ip2 = octeon_irq_ciu2;
2046         octeon_irq_ip3 = octeon_irq_ciu2_mbox;
2047         octeon_irq_ip4 = octeon_irq_ip4_mask;
2048 
2049         /* Mips internal */
2050         octeon_irq_init_core();
2051 
2052         ciu_domain = irq_domain_add_tree(
2053                 ciu_node, &octeon_irq_domain_ciu2_ops, NULL);
2054         irq_set_default_host(ciu_domain);
2055 
2056         /* CUI2 */
2057         for (i = 0; i < 64; i++) {
2058                 r = octeon_irq_force_ciu_mapping(
2059                         ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i);
2060                 if (r)
2061                         goto err;
2062         }
2063 
2064         for (i = 0; i < 32; i++) {
2065                 r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0,
2066                         &octeon_irq_chip_ciu2_wd, handle_level_irq);
2067                 if (r)
2068                         goto err;
2069         }
2070 
2071         for (i = 0; i < 4; i++) {
2072                 r = octeon_irq_force_ciu_mapping(
2073                         ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8);
2074                 if (r)
2075                         goto err;
2076         }
2077 
2078         for (i = 0; i < 4; i++) {
2079                 r = octeon_irq_force_ciu_mapping(
2080                         ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i);
2081                 if (r)
2082                         goto err;
2083         }
2084 
2085         for (i = 0; i < 4; i++) {
2086                 r = octeon_irq_force_ciu_mapping(
2087                         ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8);
2088                 if (r)
2089                         goto err;
2090         }
2091 
2092         irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2093         irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2094         irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2095         irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
2096 
2097         /* Enable the CIU lines */
2098         set_c0_status(STATUSF_IP3 | STATUSF_IP2);
2099         clear_c0_status(STATUSF_IP4);
2100         return 0;
2101 err:
2102         return r;
2103 }
2104 
2105 struct octeon_irq_cib_host_data {
2106         raw_spinlock_t lock;
2107         u64 raw_reg;
2108         u64 en_reg;
2109         int max_bits;
2110 };
2111 
2112 struct octeon_irq_cib_chip_data {
2113         struct octeon_irq_cib_host_data *host_data;
2114         int bit;
2115 };
2116 
2117 static void octeon_irq_cib_enable(struct irq_data *data)
2118 {
2119         unsigned long flags;
2120         u64 en;
2121         struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
2122         struct octeon_irq_cib_host_data *host_data = cd->host_data;
2123 
2124         raw_spin_lock_irqsave(&host_data->lock, flags);
2125         en = cvmx_read_csr(host_data->en_reg);
2126         en |= 1ull << cd->bit;
2127         cvmx_write_csr(host_data->en_reg, en);
2128         raw_spin_unlock_irqrestore(&host_data->lock, flags);
2129 }
2130 
2131 static void octeon_irq_cib_disable(struct irq_data *data)
2132 {
2133         unsigned long flags;
2134         u64 en;
2135         struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
2136         struct octeon_irq_cib_host_data *host_data = cd->host_data;
2137 
2138         raw_spin_lock_irqsave(&host_data->lock, flags);
2139         en = cvmx_read_csr(host_data->en_reg);
2140         en &= ~(1ull << cd->bit);
2141         cvmx_write_csr(host_data->en_reg, en);
2142         raw_spin_unlock_irqrestore(&host_data->lock, flags);
2143 }
2144 
2145 static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t)
2146 {
2147         irqd_set_trigger_type(data, t);
2148         return IRQ_SET_MASK_OK;
2149 }
2150 
2151 static struct irq_chip octeon_irq_chip_cib = {
2152         .name = "CIB",
2153         .irq_enable = octeon_irq_cib_enable,
2154         .irq_disable = octeon_irq_cib_disable,
2155         .irq_mask = octeon_irq_cib_disable,
2156         .irq_unmask = octeon_irq_cib_enable,
2157         .irq_set_type = octeon_irq_cib_set_type,
2158 };
2159 
2160 static int octeon_irq_cib_xlat(struct irq_domain *d,
2161                                    struct device_node *node,
2162                                    const u32 *intspec,
2163                                    unsigned int intsize,
2164                                    unsigned long *out_hwirq,
2165                                    unsigned int *out_type)
2166 {
2167         unsigned int type = 0;
2168 
2169         if (intsize == 2)
2170                 type = intspec[1];
2171 
2172         switch (type) {
2173         case 0: /* unofficial value, but we might as well let it work. */
2174         case 4: /* official value for level triggering. */
2175                 *out_type = IRQ_TYPE_LEVEL_HIGH;
2176                 break;
2177         case 1: /* official value for edge triggering. */
2178                 *out_type = IRQ_TYPE_EDGE_RISING;
2179                 break;
2180         default: /* Nothing else is acceptable. */
2181                 return -EINVAL;
2182         }
2183 
2184         *out_hwirq = intspec[0];
2185 
2186         return 0;
2187 }
2188 
2189 static int octeon_irq_cib_map(struct irq_domain *d,
2190                               unsigned int virq, irq_hw_number_t hw)
2191 {
2192         struct octeon_irq_cib_host_data *host_data = d->host_data;
2193         struct octeon_irq_cib_chip_data *cd;
2194 
2195         if (hw >= host_data->max_bits) {
2196                 pr_err("ERROR: %s mapping %u is to big!\n",
2197                        irq_domain_get_of_node(d)->name, (unsigned)hw);
2198                 return -EINVAL;
2199         }
2200 
2201         cd = kzalloc(sizeof(*cd), GFP_KERNEL);
2202         if (!cd)
2203                 return -ENOMEM;
2204 
2205         cd->host_data = host_data;
2206         cd->bit = hw;
2207 
2208         irq_set_chip_and_handler(virq, &octeon_irq_chip_cib,
2209                                  handle_simple_irq);
2210         irq_set_chip_data(virq, cd);
2211         return 0;
2212 }
2213 
2214 static struct irq_domain_ops octeon_irq_domain_cib_ops = {
2215         .map = octeon_irq_cib_map,
2216         .unmap = octeon_irq_free_cd,
2217         .xlate = octeon_irq_cib_xlat,
2218 };
2219 
2220 /* Chain to real handler. */
2221 static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data)
2222 {
2223         u64 en;
2224         u64 raw;
2225         u64 bits;
2226         int i;
2227         int irq;
2228         struct irq_domain *cib_domain = data;
2229         struct octeon_irq_cib_host_data *host_data = cib_domain->host_data;
2230 
2231         en = cvmx_read_csr(host_data->en_reg);
2232         raw = cvmx_read_csr(host_data->raw_reg);
2233 
2234         bits = en & raw;
2235 
2236         for (i = 0; i < host_data->max_bits; i++) {
2237                 if ((bits & 1ull << i) == 0)
2238                         continue;
2239                 irq = irq_find_mapping(cib_domain, i);
2240                 if (!irq) {
2241                         unsigned long flags;
2242 
2243                         pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n",
2244                                 i, host_data->raw_reg);
2245                         raw_spin_lock_irqsave(&host_data->lock, flags);
2246                         en = cvmx_read_csr(host_data->en_reg);
2247                         en &= ~(1ull << i);
2248                         cvmx_write_csr(host_data->en_reg, en);
2249                         cvmx_write_csr(host_data->raw_reg, 1ull << i);
2250                         raw_spin_unlock_irqrestore(&host_data->lock, flags);
2251                 } else {
2252                         struct irq_desc *desc = irq_to_desc(irq);
2253                         struct irq_data *irq_data = irq_desc_get_irq_data(desc);
2254                         /* If edge, acknowledge the bit we will be sending. */
2255                         if (irqd_get_trigger_type(irq_data) &
2256                                 IRQ_TYPE_EDGE_BOTH)
2257                                 cvmx_write_csr(host_data->raw_reg, 1ull << i);
2258                         generic_handle_irq_desc(desc);
2259                 }
2260         }
2261 
2262         return IRQ_HANDLED;
2263 }
2264 
2265 static int __init octeon_irq_init_cib(struct device_node *ciu_node,
2266                                       struct device_node *parent)
2267 {
2268         const __be32 *addr;
2269         u32 val;
2270         struct octeon_irq_cib_host_data *host_data;
2271         int parent_irq;
2272         int r;
2273         struct irq_domain *cib_domain;
2274 
2275         parent_irq = irq_of_parse_and_map(ciu_node, 0);
2276         if (!parent_irq) {
2277                 pr_err("ERROR: Couldn't acquire parent_irq for %pOFn\n",
2278                         ciu_node);
2279                 return -EINVAL;
2280         }
2281 
2282         host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
2283         if (!host_data)
2284                 return -ENOMEM;
2285         raw_spin_lock_init(&host_data->lock);
2286 
2287         addr = of_get_address(ciu_node, 0, NULL, NULL);
2288         if (!addr) {
2289                 pr_err("ERROR: Couldn't acquire reg(0) %pOFn\n", ciu_node);
2290                 return -EINVAL;
2291         }
2292         host_data->raw_reg = (u64)phys_to_virt(
2293                 of_translate_address(ciu_node, addr));
2294 
2295         addr = of_get_address(ciu_node, 1, NULL, NULL);
2296         if (!addr) {
2297                 pr_err("ERROR: Couldn't acquire reg(1) %pOFn\n", ciu_node);
2298                 return -EINVAL;
2299         }
2300         host_data->en_reg = (u64)phys_to_virt(
2301                 of_translate_address(ciu_node, addr));
2302 
2303         r = of_property_read_u32(ciu_node, "cavium,max-bits", &val);
2304         if (r) {
2305                 pr_err("ERROR: Couldn't read cavium,max-bits from %pOFn\n",
2306                         ciu_node);
2307                 return r;
2308         }
2309         host_data->max_bits = val;
2310 
2311         cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits,
2312                                            &octeon_irq_domain_cib_ops,
2313                                            host_data);
2314         if (!cib_domain) {
2315                 pr_err("ERROR: Couldn't irq_domain_add_linear()\n");
2316                 return -ENOMEM;
2317         }
2318 
2319         cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */
2320         cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */
2321 
2322         r = request_irq(parent_irq, octeon_irq_cib_handler,
2323                         IRQF_NO_THREAD, "cib", cib_domain);
2324         if (r) {
2325                 pr_err("request_irq cib failed %d\n", r);
2326                 return r;
2327         }
2328         pr_info("CIB interrupt controller probed: %llx %d\n",
2329                 host_data->raw_reg, host_data->max_bits);
2330         return 0;
2331 }
2332 
2333 int octeon_irq_ciu3_xlat(struct irq_domain *d,
2334                          struct device_node *node,
2335                          const u32 *intspec,
2336                          unsigned int intsize,
2337                          unsigned long *out_hwirq,
2338                          unsigned int *out_type)
2339 {
2340         struct octeon_ciu3_info *ciu3_info = d->host_data;
2341         unsigned int hwirq, type, intsn_major;
2342         union cvmx_ciu3_iscx_ctl isc;
2343 
2344         if (intsize < 2)
2345                 return -EINVAL;
2346         hwirq = intspec[0];
2347         type = intspec[1];
2348 
2349         if (hwirq >= (1 << 20))
2350                 return -EINVAL;
2351 
2352         intsn_major = hwirq >> 12;
2353         switch (intsn_major) {
2354         case 0x04: /* Software handled separately. */
2355                 return -EINVAL;
2356         default:
2357                 break;
2358         }
2359 
2360         isc.u64 =  cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq));
2361         if (!isc.s.imp)
2362                 return -EINVAL;
2363 
2364         switch (type) {
2365         case 4: /* official value for level triggering. */
2366                 *out_type = IRQ_TYPE_LEVEL_HIGH;
2367                 break;
2368         case 0: /* unofficial value, but we might as well let it work. */
2369         case 1: /* official value for edge triggering. */
2370                 *out_type = IRQ_TYPE_EDGE_RISING;
2371                 break;
2372         default: /* Nothing else is acceptable. */
2373                 return -EINVAL;
2374         }
2375 
2376         *out_hwirq = hwirq;
2377 
2378         return 0;
2379 }
2380 
2381 void octeon_irq_ciu3_enable(struct irq_data *data)
2382 {
2383         int cpu;
2384         union cvmx_ciu3_iscx_ctl isc_ctl;
2385         union cvmx_ciu3_iscx_w1c isc_w1c;
2386         u64 isc_ctl_addr;
2387 
2388         struct octeon_ciu_chip_data *cd;
2389 
2390         cpu = next_cpu_for_irq(data);
2391 
2392         cd = irq_data_get_irq_chip_data(data);
2393 
2394         isc_w1c.u64 = 0;
2395         isc_w1c.s.en = 1;
2396         cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2397 
2398         isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2399         isc_ctl.u64 = 0;
2400         isc_ctl.s.en = 1;
2401         isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
2402         cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2403         cvmx_read_csr(isc_ctl_addr);
2404 }
2405 
2406 void octeon_irq_ciu3_disable(struct irq_data *data)
2407 {
2408         u64 isc_ctl_addr;
2409         union cvmx_ciu3_iscx_w1c isc_w1c;
2410 
2411         struct octeon_ciu_chip_data *cd;
2412 
2413         cd = irq_data_get_irq_chip_data(data);
2414 
2415         isc_w1c.u64 = 0;
2416         isc_w1c.s.en = 1;
2417 
2418         isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2419         cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2420         cvmx_write_csr(isc_ctl_addr, 0);
2421         cvmx_read_csr(isc_ctl_addr);
2422 }
2423 
2424 void octeon_irq_ciu3_ack(struct irq_data *data)
2425 {
2426         u64 isc_w1c_addr;
2427         union cvmx_ciu3_iscx_w1c isc_w1c;
2428         struct octeon_ciu_chip_data *cd;
2429         u32 trigger_type = irqd_get_trigger_type(data);
2430 
2431         /*
2432          * We use a single irq_chip, so we have to do nothing to ack a
2433          * level interrupt.
2434          */
2435         if (!(trigger_type & IRQ_TYPE_EDGE_BOTH))
2436                 return;
2437 
2438         cd = irq_data_get_irq_chip_data(data);
2439 
2440         isc_w1c.u64 = 0;
2441         isc_w1c.s.raw = 1;
2442 
2443         isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2444         cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2445         cvmx_read_csr(isc_w1c_addr);
2446 }
2447 
2448 void octeon_irq_ciu3_mask(struct irq_data *data)
2449 {
2450         union cvmx_ciu3_iscx_w1c isc_w1c;
2451         u64 isc_w1c_addr;
2452         struct octeon_ciu_chip_data *cd;
2453 
2454         cd = irq_data_get_irq_chip_data(data);
2455 
2456         isc_w1c.u64 = 0;
2457         isc_w1c.s.en = 1;
2458 
2459         isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2460         cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2461         cvmx_read_csr(isc_w1c_addr);
2462 }
2463 
2464 void octeon_irq_ciu3_mask_ack(struct irq_data *data)
2465 {
2466         union cvmx_ciu3_iscx_w1c isc_w1c;
2467         u64 isc_w1c_addr;
2468         struct octeon_ciu_chip_data *cd;
2469         u32 trigger_type = irqd_get_trigger_type(data);
2470 
2471         cd = irq_data_get_irq_chip_data(data);
2472 
2473         isc_w1c.u64 = 0;
2474         isc_w1c.s.en = 1;
2475 
2476         /*
2477          * We use a single irq_chip, so only ack an edge (!level)
2478          * interrupt.
2479          */
2480         if (trigger_type & IRQ_TYPE_EDGE_BOTH)
2481                 isc_w1c.s.raw = 1;
2482 
2483         isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
2484         cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2485         cvmx_read_csr(isc_w1c_addr);
2486 }
2487 
2488 #ifdef CONFIG_SMP
2489 static int octeon_irq_ciu3_set_affinity(struct irq_data *data,
2490                                         const struct cpumask *dest, bool force)
2491 {
2492         union cvmx_ciu3_iscx_ctl isc_ctl;
2493         union cvmx_ciu3_iscx_w1c isc_w1c;
2494         u64 isc_ctl_addr;
2495         int cpu;
2496         bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
2497         struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
2498 
2499         if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node)))
2500                 return -EINVAL;
2501 
2502         if (!enable_one)
2503                 return IRQ_SET_MASK_OK;
2504 
2505         cd = irq_data_get_irq_chip_data(data);
2506         cpu = cpumask_first(dest);
2507         if (cpu >= nr_cpu_ids)
2508                 cpu = smp_processor_id();
2509         cd->current_cpu = cpu;
2510 
2511         isc_w1c.u64 = 0;
2512         isc_w1c.s.en = 1;
2513         cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
2514 
2515         isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
2516         isc_ctl.u64 = 0;
2517         isc_ctl.s.en = 1;
2518         isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
2519         cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2520         cvmx_read_csr(isc_ctl_addr);
2521 
2522         return IRQ_SET_MASK_OK;
2523 }
2524 #endif
2525 
2526 static struct irq_chip octeon_irq_chip_ciu3 = {
2527         .name = "CIU3",
2528         .irq_startup = edge_startup,
2529         .irq_enable = octeon_irq_ciu3_enable,
2530         .irq_disable = octeon_irq_ciu3_disable,
2531         .irq_ack = octeon_irq_ciu3_ack,
2532         .irq_mask = octeon_irq_ciu3_mask,
2533         .irq_mask_ack = octeon_irq_ciu3_mask_ack,
2534         .irq_unmask = octeon_irq_ciu3_enable,
2535         .irq_set_type = octeon_irq_ciu_set_type,
2536 #ifdef CONFIG_SMP
2537         .irq_set_affinity = octeon_irq_ciu3_set_affinity,
2538         .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
2539 #endif
2540 };
2541 
2542 int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq,
2543                          irq_hw_number_t hw, struct irq_chip *chip)
2544 {
2545         struct octeon_ciu3_info *ciu3_info = d->host_data;
2546         struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL,
2547                                                        ciu3_info->node);
2548         if (!cd)
2549                 return -ENOMEM;
2550         cd->intsn = hw;
2551         cd->current_cpu = -1;
2552         cd->ciu3_addr = ciu3_info->ciu3_addr;
2553         cd->ciu_node = ciu3_info->node;
2554         irq_set_chip_and_handler(virq, chip, handle_edge_irq);
2555         irq_set_chip_data(virq, cd);
2556 
2557         return 0;
2558 }
2559 
2560 static int octeon_irq_ciu3_map(struct irq_domain *d,
2561                                unsigned int virq, irq_hw_number_t hw)
2562 {
2563         return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3);
2564 }
2565 
2566 static struct irq_domain_ops octeon_dflt_domain_ciu3_ops = {
2567         .map = octeon_irq_ciu3_map,
2568         .unmap = octeon_irq_free_cd,
2569         .xlate = octeon_irq_ciu3_xlat,
2570 };
2571 
2572 static void octeon_irq_ciu3_ip2(void)
2573 {
2574         union cvmx_ciu3_destx_pp_int dest_pp_int;
2575         struct octeon_ciu3_info *ciu3_info;
2576         u64 ciu3_addr;
2577 
2578         ciu3_info = __this_cpu_read(octeon_ciu3_info);
2579         ciu3_addr = ciu3_info->ciu3_addr;
2580 
2581         dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num()));
2582 
2583         if (likely(dest_pp_int.s.intr)) {
2584                 irq_hw_number_t intsn = dest_pp_int.s.intsn;
2585                 irq_hw_number_t hw;
2586                 struct irq_domain *domain;
2587                 /* Get the domain to use from the major block */
2588                 int block = intsn >> 12;
2589                 int ret;
2590 
2591                 domain = ciu3_info->domain[block];
2592                 if (ciu3_info->intsn2hw[block])
2593                         hw = ciu3_info->intsn2hw[block](domain, intsn);
2594                 else
2595                         hw = intsn;
2596 
2597                 ret = handle_domain_irq(domain, hw, NULL);
2598                 if (ret < 0) {
2599                         union cvmx_ciu3_iscx_w1c isc_w1c;
2600                         u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
2601 
2602                         isc_w1c.u64 = 0;
2603                         isc_w1c.s.en = 1;
2604                         cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2605                         cvmx_read_csr(isc_w1c_addr);
2606                         spurious_interrupt();
2607                 }
2608         } else {
2609                 spurious_interrupt();
2610         }
2611 }
2612 
2613 /*
2614  * 10 mbox per core starting from zero.
2615  * Base mbox is core * 10
2616  */
2617 static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core)
2618 {
2619         /* SW (mbox) are 0x04 in bits 12..19 */
2620         return 0x04000 + CIU3_MBOX_PER_CORE * core;
2621 }
2622 
2623 static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox)
2624 {
2625         return octeon_irq_ciu3_base_mbox_intsn(core) + mbox;
2626 }
2627 
2628 static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox)
2629 {
2630         int local_core = octeon_coreid_for_cpu(cpu) & 0x3f;
2631 
2632         return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox);
2633 }
2634 
2635 static void octeon_irq_ciu3_mbox(void)
2636 {
2637         union cvmx_ciu3_destx_pp_int dest_pp_int;
2638         struct octeon_ciu3_info *ciu3_info;
2639         u64 ciu3_addr;
2640         int core = cvmx_get_local_core_num();
2641 
2642         ciu3_info = __this_cpu_read(octeon_ciu3_info);
2643         ciu3_addr = ciu3_info->ciu3_addr;
2644 
2645         dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core));
2646 
2647         if (likely(dest_pp_int.s.intr)) {
2648                 irq_hw_number_t intsn = dest_pp_int.s.intsn;
2649                 int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core);
2650 
2651                 if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) {
2652                         do_IRQ(mbox + OCTEON_IRQ_MBOX0);
2653                 } else {
2654                         union cvmx_ciu3_iscx_w1c isc_w1c;
2655                         u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);
2656 
2657                         isc_w1c.u64 = 0;
2658                         isc_w1c.s.en = 1;
2659                         cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2660                         cvmx_read_csr(isc_w1c_addr);
2661                         spurious_interrupt();
2662                 }
2663         } else {
2664                 spurious_interrupt();
2665         }
2666 }
2667 
2668 void octeon_ciu3_mbox_send(int cpu, unsigned int mbox)
2669 {
2670         struct octeon_ciu3_info *ciu3_info;
2671         unsigned int intsn;
2672         union cvmx_ciu3_iscx_w1s isc_w1s;
2673         u64 isc_w1s_addr;
2674 
2675         if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE))
2676                 return;
2677 
2678         intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
2679         ciu3_info = per_cpu(octeon_ciu3_info, cpu);
2680         isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn);
2681 
2682         isc_w1s.u64 = 0;
2683         isc_w1s.s.raw = 1;
2684 
2685         cvmx_write_csr(isc_w1s_addr, isc_w1s.u64);
2686         cvmx_read_csr(isc_w1s_addr);
2687 }
2688 
2689 static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en)
2690 {
2691         struct octeon_ciu3_info *ciu3_info;
2692         unsigned int intsn;
2693         u64 isc_ctl_addr, isc_w1c_addr;
2694         union cvmx_ciu3_iscx_ctl isc_ctl;
2695         unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2696 
2697         intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
2698         ciu3_info = per_cpu(octeon_ciu3_info, cpu);
2699         isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
2700         isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn);
2701 
2702         isc_ctl.u64 = 0;
2703         isc_ctl.s.en = 1;
2704 
2705         cvmx_write_csr(isc_w1c_addr, isc_ctl.u64);
2706         cvmx_write_csr(isc_ctl_addr, 0);
2707         if (en) {
2708                 unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu);
2709 
2710                 isc_ctl.u64 = 0;
2711                 isc_ctl.s.en = 1;
2712                 isc_ctl.s.idt = idt;
2713                 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
2714         }
2715         cvmx_read_csr(isc_ctl_addr);
2716 }
2717 
2718 static void octeon_irq_ciu3_mbox_enable(struct irq_data *data)
2719 {
2720         int cpu;
2721         unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2722 
2723         WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
2724 
2725         for_each_online_cpu(cpu)
2726                 octeon_irq_ciu3_mbox_set_enable(data, cpu, true);
2727 }
2728 
2729 static void octeon_irq_ciu3_mbox_disable(struct irq_data *data)
2730 {
2731         int cpu;
2732         unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2733 
2734         WARN_ON(mbox >= CIU3_MBOX_PER_CORE);
2735 
2736         for_each_online_cpu(cpu)
2737                 octeon_irq_ciu3_mbox_set_enable(data, cpu, false);
2738 }
2739 
2740 static void octeon_irq_ciu3_mbox_ack(struct irq_data *data)
2741 {
2742         struct octeon_ciu3_info *ciu3_info;
2743         unsigned int intsn;
2744         u64 isc_w1c_addr;
2745         union cvmx_ciu3_iscx_w1c isc_w1c;
2746         unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;
2747 
2748         intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox);
2749 
2750         isc_w1c.u64 = 0;
2751         isc_w1c.s.raw = 1;
2752 
2753         ciu3_info = __this_cpu_read(octeon_ciu3_info);
2754         isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
2755         cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
2756         cvmx_read_csr(isc_w1c_addr);
2757 }
2758 
2759 static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data)
2760 {
2761         octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true);
2762 }
2763 
2764 static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data)
2765 {
2766         octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false);
2767 }
2768 
2769 static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info)
2770 {
2771         u64 b = ciu3_info->ciu3_addr;
2772         int idt_ip2, idt_ip3, idt_ip4;
2773         int unused_idt2;
2774         int core = cvmx_get_local_core_num();
2775         int i;
2776 
2777         __this_cpu_write(octeon_ciu3_info, ciu3_info);
2778 
2779         /*
2780          * 4 idt per core starting from 1 because zero is reserved.
2781          * Base idt per core is 4 * core + 1
2782          */
2783         idt_ip2 = core * 4 + 1;
2784         idt_ip3 = core * 4 + 2;
2785         idt_ip4 = core * 4 + 3;
2786         unused_idt2 = core * 4 + 4;
2787         __this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2);
2788         __this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3);
2789 
2790         /* ip2 interrupts for this CPU */
2791         cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0);
2792         cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core);
2793         cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0);
2794 
2795         /* ip3 interrupts for this CPU */
2796         cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1);
2797         cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core);
2798         cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0);
2799 
2800         /* ip4 interrupts for this CPU */
2801         cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2);
2802         cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0);
2803         cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0);
2804 
2805         cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0);
2806         cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0);
2807         cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0);
2808 
2809         for (i = 0; i < CIU3_MBOX_PER_CORE; i++) {
2810                 unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i);
2811 
2812                 cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2);
2813                 cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0);
2814         }
2815 
2816         return 0;
2817 }
2818 
2819 static void octeon_irq_setup_secondary_ciu3(void)
2820 {
2821         struct octeon_ciu3_info *ciu3_info;
2822 
2823         ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()];
2824         octeon_irq_ciu3_alloc_resources(ciu3_info);
2825         irq_cpu_online();
2826 
2827         /* Enable the CIU lines */
2828         set_c0_status(STATUSF_IP3 | STATUSF_IP2);
2829         if (octeon_irq_use_ip4)
2830                 set_c0_status(STATUSF_IP4);
2831         else
2832                 clear_c0_status(STATUSF_IP4);
2833 }
2834 
2835 static struct irq_chip octeon_irq_chip_ciu3_mbox = {
2836         .name = "CIU3-M",
2837         .irq_enable = octeon_irq_ciu3_mbox_enable,
2838         .irq_disable = octeon_irq_ciu3_mbox_disable,
2839         .irq_ack = octeon_irq_ciu3_mbox_ack,
2840 
2841         .irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online,
2842         .irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline,
2843         .flags = IRQCHIP_ONOFFLINE_ENABLED,
2844 };
2845 
2846 static int __init octeon_irq_init_ciu3(struct device_node *ciu_node,
2847                                        struct device_node *parent)
2848 {
2849         int i;
2850         int node;
2851         struct irq_domain *domain;
2852         struct octeon_ciu3_info *ciu3_info;
2853         const __be32 *zero_addr;
2854         u64 base_addr;
2855         union cvmx_ciu3_const consts;
2856 
2857         node = 0; /* of_node_to_nid(ciu_node); */
2858         ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node);
2859 
2860         if (!ciu3_info)
2861                 return -ENOMEM;
2862 
2863         zero_addr = of_get_address(ciu_node, 0, NULL, NULL);
2864         if (WARN_ON(!zero_addr))
2865                 return -EINVAL;
2866 
2867         base_addr = of_translate_address(ciu_node, zero_addr);
2868         base_addr = (u64)phys_to_virt(base_addr);
2869 
2870         ciu3_info->ciu3_addr = base_addr;
2871         ciu3_info->node = node;
2872 
2873         consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST);
2874 
2875         octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3;
2876 
2877         octeon_irq_ip2 = octeon_irq_ciu3_ip2;
2878         octeon_irq_ip3 = octeon_irq_ciu3_mbox;
2879         octeon_irq_ip4 = octeon_irq_ip4_mask;
2880 
2881         if (node == cvmx_get_node_num()) {
2882                 /* Mips internal */
2883                 octeon_irq_init_core();
2884 
2885                 /* Only do per CPU things if it is the CIU of the boot node. */
2886                 i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node);
2887                 WARN_ON(i < 0);
2888 
2889                 for (i = 0; i < 8; i++)
2890                         irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0,
2891                                                  &octeon_irq_chip_ciu3_mbox, handle_percpu_irq);
2892         }
2893 
2894         /*
2895          * Initialize all domains to use the default domain. Specific major
2896          * blocks will overwrite the default domain as needed.
2897          */
2898         domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops,
2899                                      ciu3_info);
2900         for (i = 0; i < MAX_CIU3_DOMAINS; i++)
2901                 ciu3_info->domain[i] = domain;
2902 
2903         octeon_ciu3_info_per_node[node] = ciu3_info;
2904 
2905         if (node == cvmx_get_node_num()) {
2906                 /* Only do per CPU things if it is the CIU of the boot node. */
2907                 octeon_irq_ciu3_alloc_resources(ciu3_info);
2908                 if (node == 0)
2909                         irq_set_default_host(domain);
2910 
2911                 octeon_irq_use_ip4 = false;
2912                 /* Enable the CIU lines */
2913                 set_c0_status(STATUSF_IP2 | STATUSF_IP3);
2914                 clear_c0_status(STATUSF_IP4);
2915         }
2916 
2917         return 0;
2918 }
2919 
2920 static struct of_device_id ciu_types[] __initdata = {
2921         {.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu},
2922         {.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio},
2923         {.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2},
2924         {.compatible = "cavium,octeon-7890-ciu3", .data = octeon_irq_init_ciu3},
2925         {.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib},
2926         {}
2927 };
2928 
2929 void __init arch_init_irq(void)
2930 {
2931 #ifdef CONFIG_SMP
2932         /* Set the default affinity to the boot cpu. */
2933         cpumask_clear(irq_default_affinity);
2934         cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
2935 #endif
2936         of_irq_init(ciu_types);
2937 }
2938 
2939 asmlinkage void plat_irq_dispatch(void)
2940 {
2941         unsigned long cop0_cause;
2942         unsigned long cop0_status;
2943 
2944         while (1) {
2945                 cop0_cause = read_c0_cause();
2946                 cop0_status = read_c0_status();
2947                 cop0_cause &= cop0_status;
2948                 cop0_cause &= ST0_IM;
2949 
2950                 if (cop0_cause & STATUSF_IP2)
2951                         octeon_irq_ip2();
2952                 else if (cop0_cause & STATUSF_IP3)
2953                         octeon_irq_ip3();
2954                 else if (cop0_cause & STATUSF_IP4)
2955                         octeon_irq_ip4();
2956                 else if (cop0_cause)
2957                         do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
2958                 else
2959                         break;
2960         }
2961 }
2962 
2963 #ifdef CONFIG_HOTPLUG_CPU
2964 
2965 void octeon_fixup_irqs(void)
2966 {
2967         irq_cpu_offline();
2968 }
2969 
2970 #endif /* CONFIG_HOTPLUG_CPU */
2971 
2972 struct irq_domain *octeon_irq_get_block_domain(int node, uint8_t block)
2973 {
2974         struct octeon_ciu3_info *ciu3_info;
2975 
2976         ciu3_info = octeon_ciu3_info_per_node[node & CVMX_NODE_MASK];
2977         return ciu3_info->domain[block];
2978 }
2979 EXPORT_SYMBOL(octeon_irq_get_block_domain);