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 const 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 const 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 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 = irq_alloc_desc_at(OCTEON_IRQ_MBOX0, -1); 1509 if (r < 0) { 1510 pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_MBOX0"); 1511 goto err; 1512 } 1513 r = octeon_irq_set_ciu_mapping( 1514 OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq); 1515 if (r) 1516 goto err; 1517 r = irq_alloc_desc_at(OCTEON_IRQ_MBOX1, -1); 1518 if (r < 0) { 1519 pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_MBOX1"); 1520 goto err; 1521 } 1522 r = octeon_irq_set_ciu_mapping( 1523 OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq); 1524 if (r) 1525 goto err; 1526 1527 for (i = 0; i < 4; i++) { 1528 r = octeon_irq_force_ciu_mapping( 1529 ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36); 1530 if (r) 1531 goto err; 1532 } 1533 for (i = 0; i < 4; i++) { 1534 r = octeon_irq_force_ciu_mapping( 1535 ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40); 1536 if (r) 1537 goto err; 1538 } 1539 1540 r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45); 1541 if (r) 1542 goto err; 1543 1544 r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46); 1545 if (r) 1546 goto err; 1547 1548 for (i = 0; i < 4; i++) { 1549 r = octeon_irq_force_ciu_mapping( 1550 ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52); 1551 if (r) 1552 goto err; 1553 } 1554 1555 r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59); 1556 if (r) 1557 goto err; 1558 1559 r = irq_alloc_descs(OCTEON_IRQ_WDOG0, OCTEON_IRQ_WDOG0, 16, -1); 1560 if (r < 0) { 1561 pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_WDOGx"); 1562 goto err; 1563 } 1564 /* CIU_1 */ 1565 for (i = 0; i < 16; i++) { 1566 r = octeon_irq_set_ciu_mapping( 1567 i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd, 1568 handle_level_irq); 1569 if (r) 1570 goto err; 1571 } 1572 1573 /* Enable the CIU lines */ 1574 set_c0_status(STATUSF_IP3 | STATUSF_IP2); 1575 if (octeon_irq_use_ip4) 1576 set_c0_status(STATUSF_IP4); 1577 else 1578 clear_c0_status(STATUSF_IP4); 1579 1580 return 0; 1581 err: 1582 return r; 1583 } 1584 1585 static int __init octeon_irq_init_gpio( 1586 struct device_node *gpio_node, struct device_node *parent) 1587 { 1588 struct octeon_irq_gpio_domain_data *gpiod; 1589 u32 interrupt_cells; 1590 unsigned int base_hwirq; 1591 int r; 1592 1593 r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells); 1594 if (r) 1595 return r; 1596 1597 if (interrupt_cells == 1) { 1598 u32 v; 1599 1600 r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v); 1601 if (r) { 1602 pr_warn("No \"interrupts\" property.\n"); 1603 return r; 1604 } 1605 base_hwirq = v; 1606 } else if (interrupt_cells == 2) { 1607 u32 v0, v1; 1608 1609 r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0); 1610 if (r) { 1611 pr_warn("No \"interrupts\" property.\n"); 1612 return r; 1613 } 1614 r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1); 1615 if (r) { 1616 pr_warn("No \"interrupts\" property.\n"); 1617 return r; 1618 } 1619 base_hwirq = (v0 << 6) | v1; 1620 } else { 1621 pr_warn("Bad \"#interrupt-cells\" property: %u\n", 1622 interrupt_cells); 1623 return -EINVAL; 1624 } 1625 1626 gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL); 1627 if (gpiod) { 1628 /* gpio domain host_data is the base hwirq number. */ 1629 gpiod->base_hwirq = base_hwirq; 1630 irq_domain_add_linear( 1631 gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod); 1632 } else { 1633 pr_warn("Cannot allocate memory for GPIO irq_domain.\n"); 1634 return -ENOMEM; 1635 } 1636 1637 /* 1638 * Clear the OF_POPULATED flag that was set by of_irq_init() 1639 * so that all GPIO devices will be probed. 1640 */ 1641 of_node_clear_flag(gpio_node, OF_POPULATED); 1642 1643 return 0; 1644 } 1645 /* 1646 * Watchdog interrupts are special. They are associated with a single 1647 * core, so we hardwire the affinity to that core. 1648 */ 1649 static void octeon_irq_ciu2_wd_enable(struct irq_data *data) 1650 { 1651 u64 mask; 1652 u64 en_addr; 1653 int coreid = data->irq - OCTEON_IRQ_WDOG0; 1654 struct octeon_ciu_chip_data *cd; 1655 1656 cd = irq_data_get_irq_chip_data(data); 1657 mask = 1ull << (cd->bit); 1658 1659 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + 1660 (0x1000ull * cd->line); 1661 cvmx_write_csr(en_addr, mask); 1662 1663 } 1664 1665 static void octeon_irq_ciu2_enable(struct irq_data *data) 1666 { 1667 u64 mask; 1668 u64 en_addr; 1669 int cpu = next_cpu_for_irq(data); 1670 int coreid = octeon_coreid_for_cpu(cpu); 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 static void octeon_irq_ciu2_enable_local(struct irq_data *data) 1682 { 1683 u64 mask; 1684 u64 en_addr; 1685 int coreid = cvmx_get_core_num(); 1686 struct octeon_ciu_chip_data *cd; 1687 1688 cd = irq_data_get_irq_chip_data(data); 1689 mask = 1ull << (cd->bit); 1690 1691 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + 1692 (0x1000ull * cd->line); 1693 cvmx_write_csr(en_addr, mask); 1694 1695 } 1696 1697 static void octeon_irq_ciu2_disable_local(struct irq_data *data) 1698 { 1699 u64 mask; 1700 u64 en_addr; 1701 int coreid = cvmx_get_core_num(); 1702 struct octeon_ciu_chip_data *cd; 1703 1704 cd = irq_data_get_irq_chip_data(data); 1705 mask = 1ull << (cd->bit); 1706 1707 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) + 1708 (0x1000ull * cd->line); 1709 cvmx_write_csr(en_addr, mask); 1710 1711 } 1712 1713 static void octeon_irq_ciu2_ack(struct irq_data *data) 1714 { 1715 u64 mask; 1716 u64 en_addr; 1717 int coreid = cvmx_get_core_num(); 1718 struct octeon_ciu_chip_data *cd; 1719 1720 cd = irq_data_get_irq_chip_data(data); 1721 mask = 1ull << (cd->bit); 1722 1723 en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line); 1724 cvmx_write_csr(en_addr, mask); 1725 1726 } 1727 1728 static void octeon_irq_ciu2_disable_all(struct irq_data *data) 1729 { 1730 int cpu; 1731 u64 mask; 1732 struct octeon_ciu_chip_data *cd; 1733 1734 cd = irq_data_get_irq_chip_data(data); 1735 mask = 1ull << (cd->bit); 1736 1737 for_each_online_cpu(cpu) { 1738 u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C( 1739 octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line); 1740 cvmx_write_csr(en_addr, mask); 1741 } 1742 } 1743 1744 static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data) 1745 { 1746 int cpu; 1747 u64 mask; 1748 1749 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); 1750 1751 for_each_online_cpu(cpu) { 1752 u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S( 1753 octeon_coreid_for_cpu(cpu)); 1754 cvmx_write_csr(en_addr, mask); 1755 } 1756 } 1757 1758 static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data) 1759 { 1760 int cpu; 1761 u64 mask; 1762 1763 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); 1764 1765 for_each_online_cpu(cpu) { 1766 u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C( 1767 octeon_coreid_for_cpu(cpu)); 1768 cvmx_write_csr(en_addr, mask); 1769 } 1770 } 1771 1772 static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data) 1773 { 1774 u64 mask; 1775 u64 en_addr; 1776 int coreid = cvmx_get_core_num(); 1777 1778 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); 1779 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid); 1780 cvmx_write_csr(en_addr, mask); 1781 } 1782 1783 static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data) 1784 { 1785 u64 mask; 1786 u64 en_addr; 1787 int coreid = cvmx_get_core_num(); 1788 1789 mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); 1790 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid); 1791 cvmx_write_csr(en_addr, mask); 1792 } 1793 1794 #ifdef CONFIG_SMP 1795 static int octeon_irq_ciu2_set_affinity(struct irq_data *data, 1796 const struct cpumask *dest, bool force) 1797 { 1798 int cpu; 1799 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); 1800 u64 mask; 1801 struct octeon_ciu_chip_data *cd; 1802 1803 if (!enable_one) 1804 return 0; 1805 1806 cd = irq_data_get_irq_chip_data(data); 1807 mask = 1ull << cd->bit; 1808 1809 for_each_online_cpu(cpu) { 1810 u64 en_addr; 1811 if (cpumask_test_cpu(cpu, dest) && enable_one) { 1812 enable_one = false; 1813 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S( 1814 octeon_coreid_for_cpu(cpu)) + 1815 (0x1000ull * cd->line); 1816 } else { 1817 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C( 1818 octeon_coreid_for_cpu(cpu)) + 1819 (0x1000ull * cd->line); 1820 } 1821 cvmx_write_csr(en_addr, mask); 1822 } 1823 1824 return 0; 1825 } 1826 #endif 1827 1828 static void octeon_irq_ciu2_enable_gpio(struct irq_data *data) 1829 { 1830 octeon_irq_gpio_setup(data); 1831 octeon_irq_ciu2_enable(data); 1832 } 1833 1834 static void octeon_irq_ciu2_disable_gpio(struct irq_data *data) 1835 { 1836 struct octeon_ciu_chip_data *cd; 1837 1838 cd = irq_data_get_irq_chip_data(data); 1839 1840 cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0); 1841 1842 octeon_irq_ciu2_disable_all(data); 1843 } 1844 1845 static struct irq_chip octeon_irq_chip_ciu2 = { 1846 .name = "CIU2-E", 1847 .irq_enable = octeon_irq_ciu2_enable, 1848 .irq_disable = octeon_irq_ciu2_disable_all, 1849 .irq_mask = octeon_irq_ciu2_disable_local, 1850 .irq_unmask = octeon_irq_ciu2_enable, 1851 #ifdef CONFIG_SMP 1852 .irq_set_affinity = octeon_irq_ciu2_set_affinity, 1853 .irq_cpu_offline = octeon_irq_cpu_offline_ciu, 1854 #endif 1855 }; 1856 1857 static struct irq_chip octeon_irq_chip_ciu2_edge = { 1858 .name = "CIU2-E", 1859 .irq_enable = octeon_irq_ciu2_enable, 1860 .irq_disable = octeon_irq_ciu2_disable_all, 1861 .irq_ack = octeon_irq_ciu2_ack, 1862 .irq_mask = octeon_irq_ciu2_disable_local, 1863 .irq_unmask = octeon_irq_ciu2_enable, 1864 #ifdef CONFIG_SMP 1865 .irq_set_affinity = octeon_irq_ciu2_set_affinity, 1866 .irq_cpu_offline = octeon_irq_cpu_offline_ciu, 1867 #endif 1868 }; 1869 1870 static struct irq_chip octeon_irq_chip_ciu2_mbox = { 1871 .name = "CIU2-M", 1872 .irq_enable = octeon_irq_ciu2_mbox_enable_all, 1873 .irq_disable = octeon_irq_ciu2_mbox_disable_all, 1874 .irq_ack = octeon_irq_ciu2_mbox_disable_local, 1875 .irq_eoi = octeon_irq_ciu2_mbox_enable_local, 1876 1877 .irq_cpu_online = octeon_irq_ciu2_mbox_enable_local, 1878 .irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local, 1879 .flags = IRQCHIP_ONOFFLINE_ENABLED, 1880 }; 1881 1882 static struct irq_chip octeon_irq_chip_ciu2_wd = { 1883 .name = "CIU2-W", 1884 .irq_enable = octeon_irq_ciu2_wd_enable, 1885 .irq_disable = octeon_irq_ciu2_disable_all, 1886 .irq_mask = octeon_irq_ciu2_disable_local, 1887 .irq_unmask = octeon_irq_ciu2_enable_local, 1888 }; 1889 1890 static struct irq_chip octeon_irq_chip_ciu2_gpio = { 1891 .name = "CIU-GPIO", 1892 .irq_enable = octeon_irq_ciu2_enable_gpio, 1893 .irq_disable = octeon_irq_ciu2_disable_gpio, 1894 .irq_ack = octeon_irq_ciu_gpio_ack, 1895 .irq_mask = octeon_irq_ciu2_disable_local, 1896 .irq_unmask = octeon_irq_ciu2_enable, 1897 .irq_set_type = octeon_irq_ciu_gpio_set_type, 1898 #ifdef CONFIG_SMP 1899 .irq_set_affinity = octeon_irq_ciu2_set_affinity, 1900 .irq_cpu_offline = octeon_irq_cpu_offline_ciu, 1901 #endif 1902 .flags = IRQCHIP_SET_TYPE_MASKED, 1903 }; 1904 1905 static int octeon_irq_ciu2_xlat(struct irq_domain *d, 1906 struct device_node *node, 1907 const u32 *intspec, 1908 unsigned int intsize, 1909 unsigned long *out_hwirq, 1910 unsigned int *out_type) 1911 { 1912 unsigned int ciu, bit; 1913 1914 ciu = intspec[0]; 1915 bit = intspec[1]; 1916 1917 *out_hwirq = (ciu << 6) | bit; 1918 *out_type = 0; 1919 1920 return 0; 1921 } 1922 1923 static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit) 1924 { 1925 bool edge = false; 1926 1927 if (line == 3) /* MIO */ 1928 switch (bit) { 1929 case 2: /* IPD_DRP */ 1930 case 8 ... 11: /* Timers */ 1931 case 48: /* PTP */ 1932 edge = true; 1933 break; 1934 default: 1935 break; 1936 } 1937 else if (line == 6) /* PKT */ 1938 switch (bit) { 1939 case 52 ... 53: /* ILK_DRP */ 1940 case 8 ... 12: /* GMX_DRP */ 1941 edge = true; 1942 break; 1943 default: 1944 break; 1945 } 1946 return edge; 1947 } 1948 1949 static int octeon_irq_ciu2_map(struct irq_domain *d, 1950 unsigned int virq, irq_hw_number_t hw) 1951 { 1952 unsigned int line = hw >> 6; 1953 unsigned int bit = hw & 63; 1954 1955 /* 1956 * Don't map irq if it is reserved for GPIO. 1957 * (Line 7 are the GPIO lines.) 1958 */ 1959 if (line == 7) 1960 return 0; 1961 1962 if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0) 1963 return -EINVAL; 1964 1965 if (octeon_irq_ciu2_is_edge(line, bit)) 1966 octeon_irq_set_ciu_mapping(virq, line, bit, 0, 1967 &octeon_irq_chip_ciu2_edge, 1968 handle_edge_irq); 1969 else 1970 octeon_irq_set_ciu_mapping(virq, line, bit, 0, 1971 &octeon_irq_chip_ciu2, 1972 handle_level_irq); 1973 1974 return 0; 1975 } 1976 1977 static const struct irq_domain_ops octeon_irq_domain_ciu2_ops = { 1978 .map = octeon_irq_ciu2_map, 1979 .unmap = octeon_irq_free_cd, 1980 .xlate = octeon_irq_ciu2_xlat, 1981 }; 1982 1983 static void octeon_irq_ciu2(void) 1984 { 1985 int line; 1986 int bit; 1987 int irq; 1988 u64 src_reg, src, sum; 1989 const unsigned long core_id = cvmx_get_core_num(); 1990 1991 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful; 1992 1993 if (unlikely(!sum)) 1994 goto spurious; 1995 1996 line = fls64(sum) - 1; 1997 src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line); 1998 src = cvmx_read_csr(src_reg); 1999 2000 if (unlikely(!src)) 2001 goto spurious; 2002 2003 bit = fls64(src) - 1; 2004 irq = octeon_irq_ciu_to_irq[line][bit]; 2005 if (unlikely(!irq)) 2006 goto spurious; 2007 2008 do_IRQ(irq); 2009 goto out; 2010 2011 spurious: 2012 spurious_interrupt(); 2013 out: 2014 /* CN68XX pass 1.x has an errata that accessing the ACK registers 2015 can stop interrupts from propagating */ 2016 if (OCTEON_IS_MODEL(OCTEON_CN68XX)) 2017 cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY); 2018 else 2019 cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id)); 2020 return; 2021 } 2022 2023 static void octeon_irq_ciu2_mbox(void) 2024 { 2025 int line; 2026 2027 const unsigned long core_id = cvmx_get_core_num(); 2028 u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60; 2029 2030 if (unlikely(!sum)) 2031 goto spurious; 2032 2033 line = fls64(sum) - 1; 2034 2035 do_IRQ(OCTEON_IRQ_MBOX0 + line); 2036 goto out; 2037 2038 spurious: 2039 spurious_interrupt(); 2040 out: 2041 /* CN68XX pass 1.x has an errata that accessing the ACK registers 2042 can stop interrupts from propagating */ 2043 if (OCTEON_IS_MODEL(OCTEON_CN68XX)) 2044 cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY); 2045 else 2046 cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id)); 2047 return; 2048 } 2049 2050 static int __init octeon_irq_init_ciu2( 2051 struct device_node *ciu_node, struct device_node *parent) 2052 { 2053 unsigned int i, r; 2054 struct irq_domain *ciu_domain = NULL; 2055 2056 octeon_irq_init_ciu2_percpu(); 2057 octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2; 2058 2059 octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio; 2060 octeon_irq_ip2 = octeon_irq_ciu2; 2061 octeon_irq_ip3 = octeon_irq_ciu2_mbox; 2062 octeon_irq_ip4 = octeon_irq_ip4_mask; 2063 2064 /* Mips internal */ 2065 octeon_irq_init_core(); 2066 2067 ciu_domain = irq_domain_add_tree( 2068 ciu_node, &octeon_irq_domain_ciu2_ops, NULL); 2069 irq_set_default_host(ciu_domain); 2070 2071 /* CUI2 */ 2072 for (i = 0; i < 64; i++) { 2073 r = octeon_irq_force_ciu_mapping( 2074 ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i); 2075 if (r) 2076 goto err; 2077 } 2078 2079 for (i = 0; i < 32; i++) { 2080 r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0, 2081 &octeon_irq_chip_ciu2_wd, handle_level_irq); 2082 if (r) 2083 goto err; 2084 } 2085 2086 for (i = 0; i < 4; i++) { 2087 r = octeon_irq_force_ciu_mapping( 2088 ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8); 2089 if (r) 2090 goto err; 2091 } 2092 2093 for (i = 0; i < 4; i++) { 2094 r = octeon_irq_force_ciu_mapping( 2095 ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i); 2096 if (r) 2097 goto err; 2098 } 2099 2100 for (i = 0; i < 4; i++) { 2101 r = octeon_irq_force_ciu_mapping( 2102 ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8); 2103 if (r) 2104 goto err; 2105 } 2106 2107 irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); 2108 irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); 2109 irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); 2110 irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); 2111 2112 /* Enable the CIU lines */ 2113 set_c0_status(STATUSF_IP3 | STATUSF_IP2); 2114 clear_c0_status(STATUSF_IP4); 2115 return 0; 2116 err: 2117 return r; 2118 } 2119 2120 struct octeon_irq_cib_host_data { 2121 raw_spinlock_t lock; 2122 u64 raw_reg; 2123 u64 en_reg; 2124 int max_bits; 2125 }; 2126 2127 struct octeon_irq_cib_chip_data { 2128 struct octeon_irq_cib_host_data *host_data; 2129 int bit; 2130 }; 2131 2132 static void octeon_irq_cib_enable(struct irq_data *data) 2133 { 2134 unsigned long flags; 2135 u64 en; 2136 struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data); 2137 struct octeon_irq_cib_host_data *host_data = cd->host_data; 2138 2139 raw_spin_lock_irqsave(&host_data->lock, flags); 2140 en = cvmx_read_csr(host_data->en_reg); 2141 en |= 1ull << cd->bit; 2142 cvmx_write_csr(host_data->en_reg, en); 2143 raw_spin_unlock_irqrestore(&host_data->lock, flags); 2144 } 2145 2146 static void octeon_irq_cib_disable(struct irq_data *data) 2147 { 2148 unsigned long flags; 2149 u64 en; 2150 struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data); 2151 struct octeon_irq_cib_host_data *host_data = cd->host_data; 2152 2153 raw_spin_lock_irqsave(&host_data->lock, flags); 2154 en = cvmx_read_csr(host_data->en_reg); 2155 en &= ~(1ull << cd->bit); 2156 cvmx_write_csr(host_data->en_reg, en); 2157 raw_spin_unlock_irqrestore(&host_data->lock, flags); 2158 } 2159 2160 static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t) 2161 { 2162 irqd_set_trigger_type(data, t); 2163 return IRQ_SET_MASK_OK; 2164 } 2165 2166 static struct irq_chip octeon_irq_chip_cib = { 2167 .name = "CIB", 2168 .irq_enable = octeon_irq_cib_enable, 2169 .irq_disable = octeon_irq_cib_disable, 2170 .irq_mask = octeon_irq_cib_disable, 2171 .irq_unmask = octeon_irq_cib_enable, 2172 .irq_set_type = octeon_irq_cib_set_type, 2173 }; 2174 2175 static int octeon_irq_cib_xlat(struct irq_domain *d, 2176 struct device_node *node, 2177 const u32 *intspec, 2178 unsigned int intsize, 2179 unsigned long *out_hwirq, 2180 unsigned int *out_type) 2181 { 2182 unsigned int type = 0; 2183 2184 if (intsize == 2) 2185 type = intspec[1]; 2186 2187 switch (type) { 2188 case 0: /* unofficial value, but we might as well let it work. */ 2189 case 4: /* official value for level triggering. */ 2190 *out_type = IRQ_TYPE_LEVEL_HIGH; 2191 break; 2192 case 1: /* official value for edge triggering. */ 2193 *out_type = IRQ_TYPE_EDGE_RISING; 2194 break; 2195 default: /* Nothing else is acceptable. */ 2196 return -EINVAL; 2197 } 2198 2199 *out_hwirq = intspec[0]; 2200 2201 return 0; 2202 } 2203 2204 static int octeon_irq_cib_map(struct irq_domain *d, 2205 unsigned int virq, irq_hw_number_t hw) 2206 { 2207 struct octeon_irq_cib_host_data *host_data = d->host_data; 2208 struct octeon_irq_cib_chip_data *cd; 2209 2210 if (hw >= host_data->max_bits) { 2211 pr_err("ERROR: %s mapping %u is too big!\n", 2212 irq_domain_get_of_node(d)->name, (unsigned)hw); 2213 return -EINVAL; 2214 } 2215 2216 cd = kzalloc(sizeof(*cd), GFP_KERNEL); 2217 if (!cd) 2218 return -ENOMEM; 2219 2220 cd->host_data = host_data; 2221 cd->bit = hw; 2222 2223 irq_set_chip_and_handler(virq, &octeon_irq_chip_cib, 2224 handle_simple_irq); 2225 irq_set_chip_data(virq, cd); 2226 return 0; 2227 } 2228 2229 static const struct irq_domain_ops octeon_irq_domain_cib_ops = { 2230 .map = octeon_irq_cib_map, 2231 .unmap = octeon_irq_free_cd, 2232 .xlate = octeon_irq_cib_xlat, 2233 }; 2234 2235 /* Chain to real handler. */ 2236 static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data) 2237 { 2238 u64 en; 2239 u64 raw; 2240 u64 bits; 2241 int i; 2242 int irq; 2243 struct irq_domain *cib_domain = data; 2244 struct octeon_irq_cib_host_data *host_data = cib_domain->host_data; 2245 2246 en = cvmx_read_csr(host_data->en_reg); 2247 raw = cvmx_read_csr(host_data->raw_reg); 2248 2249 bits = en & raw; 2250 2251 for (i = 0; i < host_data->max_bits; i++) { 2252 if ((bits & 1ull << i) == 0) 2253 continue; 2254 irq = irq_find_mapping(cib_domain, i); 2255 if (!irq) { 2256 unsigned long flags; 2257 2258 pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n", 2259 i, host_data->raw_reg); 2260 raw_spin_lock_irqsave(&host_data->lock, flags); 2261 en = cvmx_read_csr(host_data->en_reg); 2262 en &= ~(1ull << i); 2263 cvmx_write_csr(host_data->en_reg, en); 2264 cvmx_write_csr(host_data->raw_reg, 1ull << i); 2265 raw_spin_unlock_irqrestore(&host_data->lock, flags); 2266 } else { 2267 struct irq_desc *desc = irq_to_desc(irq); 2268 struct irq_data *irq_data = irq_desc_get_irq_data(desc); 2269 /* If edge, acknowledge the bit we will be sending. */ 2270 if (irqd_get_trigger_type(irq_data) & 2271 IRQ_TYPE_EDGE_BOTH) 2272 cvmx_write_csr(host_data->raw_reg, 1ull << i); 2273 generic_handle_irq_desc(desc); 2274 } 2275 } 2276 2277 return IRQ_HANDLED; 2278 } 2279 2280 static int __init octeon_irq_init_cib(struct device_node *ciu_node, 2281 struct device_node *parent) 2282 { 2283 const __be32 *addr; 2284 u32 val; 2285 struct octeon_irq_cib_host_data *host_data; 2286 int parent_irq; 2287 int r; 2288 struct irq_domain *cib_domain; 2289 2290 parent_irq = irq_of_parse_and_map(ciu_node, 0); 2291 if (!parent_irq) { 2292 pr_err("ERROR: Couldn't acquire parent_irq for %pOFn\n", 2293 ciu_node); 2294 return -EINVAL; 2295 } 2296 2297 host_data = kzalloc(sizeof(*host_data), GFP_KERNEL); 2298 if (!host_data) 2299 return -ENOMEM; 2300 raw_spin_lock_init(&host_data->lock); 2301 2302 addr = of_get_address(ciu_node, 0, NULL, NULL); 2303 if (!addr) { 2304 pr_err("ERROR: Couldn't acquire reg(0) %pOFn\n", ciu_node); 2305 return -EINVAL; 2306 } 2307 host_data->raw_reg = (u64)phys_to_virt( 2308 of_translate_address(ciu_node, addr)); 2309 2310 addr = of_get_address(ciu_node, 1, NULL, NULL); 2311 if (!addr) { 2312 pr_err("ERROR: Couldn't acquire reg(1) %pOFn\n", ciu_node); 2313 return -EINVAL; 2314 } 2315 host_data->en_reg = (u64)phys_to_virt( 2316 of_translate_address(ciu_node, addr)); 2317 2318 r = of_property_read_u32(ciu_node, "cavium,max-bits", &val); 2319 if (r) { 2320 pr_err("ERROR: Couldn't read cavium,max-bits from %pOFn\n", 2321 ciu_node); 2322 return r; 2323 } 2324 host_data->max_bits = val; 2325 2326 cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits, 2327 &octeon_irq_domain_cib_ops, 2328 host_data); 2329 if (!cib_domain) { 2330 pr_err("ERROR: Couldn't irq_domain_add_linear()\n"); 2331 return -ENOMEM; 2332 } 2333 2334 cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */ 2335 cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */ 2336 2337 r = request_irq(parent_irq, octeon_irq_cib_handler, 2338 IRQF_NO_THREAD, "cib", cib_domain); 2339 if (r) { 2340 pr_err("request_irq cib failed %d\n", r); 2341 return r; 2342 } 2343 pr_info("CIB interrupt controller probed: %llx %d\n", 2344 host_data->raw_reg, host_data->max_bits); 2345 return 0; 2346 } 2347 2348 int octeon_irq_ciu3_xlat(struct irq_domain *d, 2349 struct device_node *node, 2350 const u32 *intspec, 2351 unsigned int intsize, 2352 unsigned long *out_hwirq, 2353 unsigned int *out_type) 2354 { 2355 struct octeon_ciu3_info *ciu3_info = d->host_data; 2356 unsigned int hwirq, type, intsn_major; 2357 union cvmx_ciu3_iscx_ctl isc; 2358 2359 if (intsize < 2) 2360 return -EINVAL; 2361 hwirq = intspec[0]; 2362 type = intspec[1]; 2363 2364 if (hwirq >= (1 << 20)) 2365 return -EINVAL; 2366 2367 intsn_major = hwirq >> 12; 2368 switch (intsn_major) { 2369 case 0x04: /* Software handled separately. */ 2370 return -EINVAL; 2371 default: 2372 break; 2373 } 2374 2375 isc.u64 = cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq)); 2376 if (!isc.s.imp) 2377 return -EINVAL; 2378 2379 switch (type) { 2380 case 4: /* official value for level triggering. */ 2381 *out_type = IRQ_TYPE_LEVEL_HIGH; 2382 break; 2383 case 0: /* unofficial value, but we might as well let it work. */ 2384 case 1: /* official value for edge triggering. */ 2385 *out_type = IRQ_TYPE_EDGE_RISING; 2386 break; 2387 default: /* Nothing else is acceptable. */ 2388 return -EINVAL; 2389 } 2390 2391 *out_hwirq = hwirq; 2392 2393 return 0; 2394 } 2395 2396 void octeon_irq_ciu3_enable(struct irq_data *data) 2397 { 2398 int cpu; 2399 union cvmx_ciu3_iscx_ctl isc_ctl; 2400 union cvmx_ciu3_iscx_w1c isc_w1c; 2401 u64 isc_ctl_addr; 2402 2403 struct octeon_ciu_chip_data *cd; 2404 2405 cpu = next_cpu_for_irq(data); 2406 2407 cd = irq_data_get_irq_chip_data(data); 2408 2409 isc_w1c.u64 = 0; 2410 isc_w1c.s.en = 1; 2411 cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64); 2412 2413 isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn); 2414 isc_ctl.u64 = 0; 2415 isc_ctl.s.en = 1; 2416 isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu); 2417 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64); 2418 cvmx_read_csr(isc_ctl_addr); 2419 } 2420 2421 void octeon_irq_ciu3_disable(struct irq_data *data) 2422 { 2423 u64 isc_ctl_addr; 2424 union cvmx_ciu3_iscx_w1c isc_w1c; 2425 2426 struct octeon_ciu_chip_data *cd; 2427 2428 cd = irq_data_get_irq_chip_data(data); 2429 2430 isc_w1c.u64 = 0; 2431 isc_w1c.s.en = 1; 2432 2433 isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn); 2434 cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64); 2435 cvmx_write_csr(isc_ctl_addr, 0); 2436 cvmx_read_csr(isc_ctl_addr); 2437 } 2438 2439 void octeon_irq_ciu3_ack(struct irq_data *data) 2440 { 2441 u64 isc_w1c_addr; 2442 union cvmx_ciu3_iscx_w1c isc_w1c; 2443 struct octeon_ciu_chip_data *cd; 2444 u32 trigger_type = irqd_get_trigger_type(data); 2445 2446 /* 2447 * We use a single irq_chip, so we have to do nothing to ack a 2448 * level interrupt. 2449 */ 2450 if (!(trigger_type & IRQ_TYPE_EDGE_BOTH)) 2451 return; 2452 2453 cd = irq_data_get_irq_chip_data(data); 2454 2455 isc_w1c.u64 = 0; 2456 isc_w1c.s.raw = 1; 2457 2458 isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn); 2459 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); 2460 cvmx_read_csr(isc_w1c_addr); 2461 } 2462 2463 void octeon_irq_ciu3_mask(struct irq_data *data) 2464 { 2465 union cvmx_ciu3_iscx_w1c isc_w1c; 2466 u64 isc_w1c_addr; 2467 struct octeon_ciu_chip_data *cd; 2468 2469 cd = irq_data_get_irq_chip_data(data); 2470 2471 isc_w1c.u64 = 0; 2472 isc_w1c.s.en = 1; 2473 2474 isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn); 2475 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); 2476 cvmx_read_csr(isc_w1c_addr); 2477 } 2478 2479 void octeon_irq_ciu3_mask_ack(struct irq_data *data) 2480 { 2481 union cvmx_ciu3_iscx_w1c isc_w1c; 2482 u64 isc_w1c_addr; 2483 struct octeon_ciu_chip_data *cd; 2484 u32 trigger_type = irqd_get_trigger_type(data); 2485 2486 cd = irq_data_get_irq_chip_data(data); 2487 2488 isc_w1c.u64 = 0; 2489 isc_w1c.s.en = 1; 2490 2491 /* 2492 * We use a single irq_chip, so only ack an edge (!level) 2493 * interrupt. 2494 */ 2495 if (trigger_type & IRQ_TYPE_EDGE_BOTH) 2496 isc_w1c.s.raw = 1; 2497 2498 isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn); 2499 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); 2500 cvmx_read_csr(isc_w1c_addr); 2501 } 2502 2503 #ifdef CONFIG_SMP 2504 static int octeon_irq_ciu3_set_affinity(struct irq_data *data, 2505 const struct cpumask *dest, bool force) 2506 { 2507 union cvmx_ciu3_iscx_ctl isc_ctl; 2508 union cvmx_ciu3_iscx_w1c isc_w1c; 2509 u64 isc_ctl_addr; 2510 int cpu; 2511 bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); 2512 struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data); 2513 2514 if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node))) 2515 return -EINVAL; 2516 2517 if (!enable_one) 2518 return IRQ_SET_MASK_OK; 2519 2520 cd = irq_data_get_irq_chip_data(data); 2521 cpu = cpumask_first(dest); 2522 if (cpu >= nr_cpu_ids) 2523 cpu = smp_processor_id(); 2524 cd->current_cpu = cpu; 2525 2526 isc_w1c.u64 = 0; 2527 isc_w1c.s.en = 1; 2528 cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64); 2529 2530 isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn); 2531 isc_ctl.u64 = 0; 2532 isc_ctl.s.en = 1; 2533 isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu); 2534 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64); 2535 cvmx_read_csr(isc_ctl_addr); 2536 2537 return IRQ_SET_MASK_OK; 2538 } 2539 #endif 2540 2541 static struct irq_chip octeon_irq_chip_ciu3 = { 2542 .name = "CIU3", 2543 .irq_startup = edge_startup, 2544 .irq_enable = octeon_irq_ciu3_enable, 2545 .irq_disable = octeon_irq_ciu3_disable, 2546 .irq_ack = octeon_irq_ciu3_ack, 2547 .irq_mask = octeon_irq_ciu3_mask, 2548 .irq_mask_ack = octeon_irq_ciu3_mask_ack, 2549 .irq_unmask = octeon_irq_ciu3_enable, 2550 .irq_set_type = octeon_irq_ciu_set_type, 2551 #ifdef CONFIG_SMP 2552 .irq_set_affinity = octeon_irq_ciu3_set_affinity, 2553 .irq_cpu_offline = octeon_irq_cpu_offline_ciu, 2554 #endif 2555 }; 2556 2557 int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq, 2558 irq_hw_number_t hw, struct irq_chip *chip) 2559 { 2560 struct octeon_ciu3_info *ciu3_info = d->host_data; 2561 struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL, 2562 ciu3_info->node); 2563 if (!cd) 2564 return -ENOMEM; 2565 cd->intsn = hw; 2566 cd->current_cpu = -1; 2567 cd->ciu3_addr = ciu3_info->ciu3_addr; 2568 cd->ciu_node = ciu3_info->node; 2569 irq_set_chip_and_handler(virq, chip, handle_edge_irq); 2570 irq_set_chip_data(virq, cd); 2571 2572 return 0; 2573 } 2574 2575 static int octeon_irq_ciu3_map(struct irq_domain *d, 2576 unsigned int virq, irq_hw_number_t hw) 2577 { 2578 return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3); 2579 } 2580 2581 static const struct irq_domain_ops octeon_dflt_domain_ciu3_ops = { 2582 .map = octeon_irq_ciu3_map, 2583 .unmap = octeon_irq_free_cd, 2584 .xlate = octeon_irq_ciu3_xlat, 2585 }; 2586 2587 static void octeon_irq_ciu3_ip2(void) 2588 { 2589 union cvmx_ciu3_destx_pp_int dest_pp_int; 2590 struct octeon_ciu3_info *ciu3_info; 2591 u64 ciu3_addr; 2592 2593 ciu3_info = __this_cpu_read(octeon_ciu3_info); 2594 ciu3_addr = ciu3_info->ciu3_addr; 2595 2596 dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num())); 2597 2598 if (likely(dest_pp_int.s.intr)) { 2599 irq_hw_number_t intsn = dest_pp_int.s.intsn; 2600 irq_hw_number_t hw; 2601 struct irq_domain *domain; 2602 /* Get the domain to use from the major block */ 2603 int block = intsn >> 12; 2604 int ret; 2605 2606 domain = ciu3_info->domain[block]; 2607 if (ciu3_info->intsn2hw[block]) 2608 hw = ciu3_info->intsn2hw[block](domain, intsn); 2609 else 2610 hw = intsn; 2611 2612 irq_enter(); 2613 ret = generic_handle_domain_irq(domain, hw); 2614 irq_exit(); 2615 2616 if (ret < 0) { 2617 union cvmx_ciu3_iscx_w1c isc_w1c; 2618 u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn); 2619 2620 isc_w1c.u64 = 0; 2621 isc_w1c.s.en = 1; 2622 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); 2623 cvmx_read_csr(isc_w1c_addr); 2624 spurious_interrupt(); 2625 } 2626 } else { 2627 spurious_interrupt(); 2628 } 2629 } 2630 2631 /* 2632 * 10 mbox per core starting from zero. 2633 * Base mbox is core * 10 2634 */ 2635 static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core) 2636 { 2637 /* SW (mbox) are 0x04 in bits 12..19 */ 2638 return 0x04000 + CIU3_MBOX_PER_CORE * core; 2639 } 2640 2641 static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox) 2642 { 2643 return octeon_irq_ciu3_base_mbox_intsn(core) + mbox; 2644 } 2645 2646 static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox) 2647 { 2648 int local_core = octeon_coreid_for_cpu(cpu) & 0x3f; 2649 2650 return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox); 2651 } 2652 2653 static void octeon_irq_ciu3_mbox(void) 2654 { 2655 union cvmx_ciu3_destx_pp_int dest_pp_int; 2656 struct octeon_ciu3_info *ciu3_info; 2657 u64 ciu3_addr; 2658 int core = cvmx_get_local_core_num(); 2659 2660 ciu3_info = __this_cpu_read(octeon_ciu3_info); 2661 ciu3_addr = ciu3_info->ciu3_addr; 2662 2663 dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core)); 2664 2665 if (likely(dest_pp_int.s.intr)) { 2666 irq_hw_number_t intsn = dest_pp_int.s.intsn; 2667 int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core); 2668 2669 if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) { 2670 do_IRQ(mbox + OCTEON_IRQ_MBOX0); 2671 } else { 2672 union cvmx_ciu3_iscx_w1c isc_w1c; 2673 u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn); 2674 2675 isc_w1c.u64 = 0; 2676 isc_w1c.s.en = 1; 2677 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); 2678 cvmx_read_csr(isc_w1c_addr); 2679 spurious_interrupt(); 2680 } 2681 } else { 2682 spurious_interrupt(); 2683 } 2684 } 2685 2686 void octeon_ciu3_mbox_send(int cpu, unsigned int mbox) 2687 { 2688 struct octeon_ciu3_info *ciu3_info; 2689 unsigned int intsn; 2690 union cvmx_ciu3_iscx_w1s isc_w1s; 2691 u64 isc_w1s_addr; 2692 2693 if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE)) 2694 return; 2695 2696 intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox); 2697 ciu3_info = per_cpu(octeon_ciu3_info, cpu); 2698 isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn); 2699 2700 isc_w1s.u64 = 0; 2701 isc_w1s.s.raw = 1; 2702 2703 cvmx_write_csr(isc_w1s_addr, isc_w1s.u64); 2704 cvmx_read_csr(isc_w1s_addr); 2705 } 2706 2707 static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en) 2708 { 2709 struct octeon_ciu3_info *ciu3_info; 2710 unsigned int intsn; 2711 u64 isc_ctl_addr, isc_w1c_addr; 2712 union cvmx_ciu3_iscx_ctl isc_ctl; 2713 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; 2714 2715 intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox); 2716 ciu3_info = per_cpu(octeon_ciu3_info, cpu); 2717 isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn); 2718 isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn); 2719 2720 isc_ctl.u64 = 0; 2721 isc_ctl.s.en = 1; 2722 2723 cvmx_write_csr(isc_w1c_addr, isc_ctl.u64); 2724 cvmx_write_csr(isc_ctl_addr, 0); 2725 if (en) { 2726 unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu); 2727 2728 isc_ctl.u64 = 0; 2729 isc_ctl.s.en = 1; 2730 isc_ctl.s.idt = idt; 2731 cvmx_write_csr(isc_ctl_addr, isc_ctl.u64); 2732 } 2733 cvmx_read_csr(isc_ctl_addr); 2734 } 2735 2736 static void octeon_irq_ciu3_mbox_enable(struct irq_data *data) 2737 { 2738 int cpu; 2739 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; 2740 2741 WARN_ON(mbox >= CIU3_MBOX_PER_CORE); 2742 2743 for_each_online_cpu(cpu) 2744 octeon_irq_ciu3_mbox_set_enable(data, cpu, true); 2745 } 2746 2747 static void octeon_irq_ciu3_mbox_disable(struct irq_data *data) 2748 { 2749 int cpu; 2750 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; 2751 2752 WARN_ON(mbox >= CIU3_MBOX_PER_CORE); 2753 2754 for_each_online_cpu(cpu) 2755 octeon_irq_ciu3_mbox_set_enable(data, cpu, false); 2756 } 2757 2758 static void octeon_irq_ciu3_mbox_ack(struct irq_data *data) 2759 { 2760 struct octeon_ciu3_info *ciu3_info; 2761 unsigned int intsn; 2762 u64 isc_w1c_addr; 2763 union cvmx_ciu3_iscx_w1c isc_w1c; 2764 unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; 2765 2766 intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox); 2767 2768 isc_w1c.u64 = 0; 2769 isc_w1c.s.raw = 1; 2770 2771 ciu3_info = __this_cpu_read(octeon_ciu3_info); 2772 isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn); 2773 cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); 2774 cvmx_read_csr(isc_w1c_addr); 2775 } 2776 2777 static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data) 2778 { 2779 octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true); 2780 } 2781 2782 static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data) 2783 { 2784 octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false); 2785 } 2786 2787 static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info) 2788 { 2789 u64 b = ciu3_info->ciu3_addr; 2790 int idt_ip2, idt_ip3, idt_ip4; 2791 int unused_idt2; 2792 int core = cvmx_get_local_core_num(); 2793 int i; 2794 2795 __this_cpu_write(octeon_ciu3_info, ciu3_info); 2796 2797 /* 2798 * 4 idt per core starting from 1 because zero is reserved. 2799 * Base idt per core is 4 * core + 1 2800 */ 2801 idt_ip2 = core * 4 + 1; 2802 idt_ip3 = core * 4 + 2; 2803 idt_ip4 = core * 4 + 3; 2804 unused_idt2 = core * 4 + 4; 2805 __this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2); 2806 __this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3); 2807 2808 /* ip2 interrupts for this CPU */ 2809 cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0); 2810 cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core); 2811 cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0); 2812 2813 /* ip3 interrupts for this CPU */ 2814 cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1); 2815 cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core); 2816 cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0); 2817 2818 /* ip4 interrupts for this CPU */ 2819 cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2); 2820 cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0); 2821 cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0); 2822 2823 cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0); 2824 cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0); 2825 cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0); 2826 2827 for (i = 0; i < CIU3_MBOX_PER_CORE; i++) { 2828 unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i); 2829 2830 cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2); 2831 cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0); 2832 } 2833 2834 return 0; 2835 } 2836 2837 static void octeon_irq_setup_secondary_ciu3(void) 2838 { 2839 struct octeon_ciu3_info *ciu3_info; 2840 2841 ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()]; 2842 octeon_irq_ciu3_alloc_resources(ciu3_info); 2843 irq_cpu_online(); 2844 2845 /* Enable the CIU lines */ 2846 set_c0_status(STATUSF_IP3 | STATUSF_IP2); 2847 if (octeon_irq_use_ip4) 2848 set_c0_status(STATUSF_IP4); 2849 else 2850 clear_c0_status(STATUSF_IP4); 2851 } 2852 2853 static struct irq_chip octeon_irq_chip_ciu3_mbox = { 2854 .name = "CIU3-M", 2855 .irq_enable = octeon_irq_ciu3_mbox_enable, 2856 .irq_disable = octeon_irq_ciu3_mbox_disable, 2857 .irq_ack = octeon_irq_ciu3_mbox_ack, 2858 2859 .irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online, 2860 .irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline, 2861 .flags = IRQCHIP_ONOFFLINE_ENABLED, 2862 }; 2863 2864 static int __init octeon_irq_init_ciu3(struct device_node *ciu_node, 2865 struct device_node *parent) 2866 { 2867 int i; 2868 int node; 2869 struct irq_domain *domain; 2870 struct octeon_ciu3_info *ciu3_info; 2871 const __be32 *zero_addr; 2872 u64 base_addr; 2873 union cvmx_ciu3_const consts; 2874 2875 node = 0; /* of_node_to_nid(ciu_node); */ 2876 ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node); 2877 2878 if (!ciu3_info) 2879 return -ENOMEM; 2880 2881 zero_addr = of_get_address(ciu_node, 0, NULL, NULL); 2882 if (WARN_ON(!zero_addr)) 2883 return -EINVAL; 2884 2885 base_addr = of_translate_address(ciu_node, zero_addr); 2886 base_addr = (u64)phys_to_virt(base_addr); 2887 2888 ciu3_info->ciu3_addr = base_addr; 2889 ciu3_info->node = node; 2890 2891 consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST); 2892 2893 octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3; 2894 2895 octeon_irq_ip2 = octeon_irq_ciu3_ip2; 2896 octeon_irq_ip3 = octeon_irq_ciu3_mbox; 2897 octeon_irq_ip4 = octeon_irq_ip4_mask; 2898 2899 if (node == cvmx_get_node_num()) { 2900 /* Mips internal */ 2901 octeon_irq_init_core(); 2902 2903 /* Only do per CPU things if it is the CIU of the boot node. */ 2904 i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node); 2905 WARN_ON(i < 0); 2906 2907 for (i = 0; i < 8; i++) 2908 irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0, 2909 &octeon_irq_chip_ciu3_mbox, handle_percpu_irq); 2910 } 2911 2912 /* 2913 * Initialize all domains to use the default domain. Specific major 2914 * blocks will overwrite the default domain as needed. 2915 */ 2916 domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops, 2917 ciu3_info); 2918 for (i = 0; i < MAX_CIU3_DOMAINS; i++) 2919 ciu3_info->domain[i] = domain; 2920 2921 octeon_ciu3_info_per_node[node] = ciu3_info; 2922 2923 if (node == cvmx_get_node_num()) { 2924 /* Only do per CPU things if it is the CIU of the boot node. */ 2925 octeon_irq_ciu3_alloc_resources(ciu3_info); 2926 if (node == 0) 2927 irq_set_default_host(domain); 2928 2929 octeon_irq_use_ip4 = false; 2930 /* Enable the CIU lines */ 2931 set_c0_status(STATUSF_IP2 | STATUSF_IP3); 2932 clear_c0_status(STATUSF_IP4); 2933 } 2934 2935 return 0; 2936 } 2937 2938 static struct of_device_id ciu_types[] __initdata = { 2939 {.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu}, 2940 {.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio}, 2941 {.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2}, 2942 {.compatible = "cavium,octeon-7890-ciu3", .data = octeon_irq_init_ciu3}, 2943 {.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib}, 2944 {} 2945 }; 2946 2947 void __init arch_init_irq(void) 2948 { 2949 #ifdef CONFIG_SMP 2950 /* Set the default affinity to the boot cpu. */ 2951 cpumask_clear(irq_default_affinity); 2952 cpumask_set_cpu(smp_processor_id(), irq_default_affinity); 2953 #endif 2954 of_irq_init(ciu_types); 2955 } 2956 2957 asmlinkage void plat_irq_dispatch(void) 2958 { 2959 unsigned long cop0_cause; 2960 unsigned long cop0_status; 2961 2962 while (1) { 2963 cop0_cause = read_c0_cause(); 2964 cop0_status = read_c0_status(); 2965 cop0_cause &= cop0_status; 2966 cop0_cause &= ST0_IM; 2967 2968 if (cop0_cause & STATUSF_IP2) 2969 octeon_irq_ip2(); 2970 else if (cop0_cause & STATUSF_IP3) 2971 octeon_irq_ip3(); 2972 else if (cop0_cause & STATUSF_IP4) 2973 octeon_irq_ip4(); 2974 else if (cop0_cause) 2975 do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE); 2976 else 2977 break; 2978 } 2979 } 2980 2981 #ifdef CONFIG_HOTPLUG_CPU 2982 2983 void octeon_fixup_irqs(void) 2984 { 2985 irq_cpu_offline(); 2986 } 2987 2988 #endif /* CONFIG_HOTPLUG_CPU */ 2989 2990 struct irq_domain *octeon_irq_get_block_domain(int node, uint8_t block) 2991 { 2992 struct octeon_ciu3_info *ciu3_info; 2993 2994 ciu3_info = octeon_ciu3_info_per_node[node & CVMX_NODE_MASK]; 2995 return ciu3_info->domain[block]; 2996 } 2997 EXPORT_SYMBOL(octeon_irq_get_block_domain); 2998