1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * PS3 Platform spu routines. 4 * 5 * Copyright (C) 2006 Sony Computer Entertainment Inc. 6 * Copyright 2006 Sony Corp. 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/init.h> 11 #include <linux/slab.h> 12 #include <linux/mmzone.h> 13 #include <linux/export.h> 14 #include <linux/io.h> 15 #include <linux/mm.h> 16 17 #include <asm/spu.h> 18 #include <asm/spu_priv1.h> 19 #include <asm/lv1call.h> 20 #include <asm/ps3.h> 21 22 #include "../cell/spufs/spufs.h" 23 #include "platform.h" 24 25 /* spu_management_ops */ 26 27 /** 28 * enum spe_type - Type of spe to create. 29 * @spe_type_logical: Standard logical spe. 30 * 31 * For use with lv1_construct_logical_spe(). The current HV does not support 32 * any types other than those listed. 33 */ 34 35 enum spe_type { 36 SPE_TYPE_LOGICAL = 0, 37 }; 38 39 /** 40 * struct spe_shadow - logical spe shadow register area. 41 * 42 * Read-only shadow of spe registers. 43 */ 44 45 struct spe_shadow { 46 u8 padding_0140[0x0140]; 47 u64 int_status_class0_RW; /* 0x0140 */ 48 u64 int_status_class1_RW; /* 0x0148 */ 49 u64 int_status_class2_RW; /* 0x0150 */ 50 u8 padding_0158[0x0610-0x0158]; 51 u64 mfc_dsisr_RW; /* 0x0610 */ 52 u8 padding_0618[0x0620-0x0618]; 53 u64 mfc_dar_RW; /* 0x0620 */ 54 u8 padding_0628[0x0800-0x0628]; 55 u64 mfc_dsipr_R; /* 0x0800 */ 56 u8 padding_0808[0x0810-0x0808]; 57 u64 mfc_lscrr_R; /* 0x0810 */ 58 u8 padding_0818[0x0c00-0x0818]; 59 u64 mfc_cer_R; /* 0x0c00 */ 60 u8 padding_0c08[0x0f00-0x0c08]; 61 u64 spe_execution_status; /* 0x0f00 */ 62 u8 padding_0f08[0x1000-0x0f08]; 63 }; 64 65 /** 66 * enum spe_ex_state - Logical spe execution state. 67 * @spe_ex_state_unexecutable: Uninitialized. 68 * @spe_ex_state_executable: Enabled, not ready. 69 * @spe_ex_state_executed: Ready for use. 70 * 71 * The execution state (status) of the logical spe as reported in 72 * struct spe_shadow:spe_execution_status. 73 */ 74 75 enum spe_ex_state { 76 SPE_EX_STATE_UNEXECUTABLE = 0, 77 SPE_EX_STATE_EXECUTABLE = 2, 78 SPE_EX_STATE_EXECUTED = 3, 79 }; 80 81 /** 82 * struct priv1_cache - Cached values of priv1 registers. 83 * @masks[]: Array of cached spe interrupt masks, indexed by class. 84 * @sr1: Cached mfc_sr1 register. 85 * @tclass_id: Cached mfc_tclass_id register. 86 */ 87 88 struct priv1_cache { 89 u64 masks[3]; 90 u64 sr1; 91 u64 tclass_id; 92 }; 93 94 /** 95 * struct spu_pdata - Platform state variables. 96 * @spe_id: HV spe id returned by lv1_construct_logical_spe(). 97 * @resource_id: HV spe resource id returned by 98 * ps3_repository_read_spe_resource_id(). 99 * @priv2_addr: lpar address of spe priv2 area returned by 100 * lv1_construct_logical_spe(). 101 * @shadow_addr: lpar address of spe register shadow area returned by 102 * lv1_construct_logical_spe(). 103 * @shadow: Virtual (ioremap) address of spe register shadow area. 104 * @cache: Cached values of priv1 registers. 105 */ 106 107 struct spu_pdata { 108 u64 spe_id; 109 u64 resource_id; 110 u64 priv2_addr; 111 u64 shadow_addr; 112 struct spe_shadow __iomem *shadow; 113 struct priv1_cache cache; 114 }; 115 116 static struct spu_pdata *spu_pdata(struct spu *spu) 117 { 118 return spu->pdata; 119 } 120 121 #define dump_areas(_a, _b, _c, _d, _e) \ 122 _dump_areas(_a, _b, _c, _d, _e, __func__, __LINE__) 123 static void _dump_areas(unsigned int spe_id, unsigned long priv2, 124 unsigned long problem, unsigned long ls, unsigned long shadow, 125 const char* func, int line) 126 { 127 pr_debug("%s:%d: spe_id: %xh (%u)\n", func, line, spe_id, spe_id); 128 pr_debug("%s:%d: priv2: %lxh\n", func, line, priv2); 129 pr_debug("%s:%d: problem: %lxh\n", func, line, problem); 130 pr_debug("%s:%d: ls: %lxh\n", func, line, ls); 131 pr_debug("%s:%d: shadow: %lxh\n", func, line, shadow); 132 } 133 134 u64 ps3_get_spe_id(void *arg) 135 { 136 return spu_pdata(arg)->spe_id; 137 } 138 EXPORT_SYMBOL_GPL(ps3_get_spe_id); 139 140 static unsigned long __init get_vas_id(void) 141 { 142 u64 id; 143 144 lv1_get_logical_ppe_id(&id); 145 lv1_get_virtual_address_space_id_of_ppe(&id); 146 147 return id; 148 } 149 150 static int __init construct_spu(struct spu *spu) 151 { 152 int result; 153 u64 unused; 154 u64 problem_phys; 155 u64 local_store_phys; 156 157 result = lv1_construct_logical_spe(PAGE_SHIFT, PAGE_SHIFT, PAGE_SHIFT, 158 PAGE_SHIFT, PAGE_SHIFT, get_vas_id(), SPE_TYPE_LOGICAL, 159 &spu_pdata(spu)->priv2_addr, &problem_phys, 160 &local_store_phys, &unused, 161 &spu_pdata(spu)->shadow_addr, 162 &spu_pdata(spu)->spe_id); 163 spu->problem_phys = problem_phys; 164 spu->local_store_phys = local_store_phys; 165 166 if (result) { 167 pr_debug("%s:%d: lv1_construct_logical_spe failed: %s\n", 168 __func__, __LINE__, ps3_result(result)); 169 return result; 170 } 171 172 return result; 173 } 174 175 static void spu_unmap(struct spu *spu) 176 { 177 iounmap(spu->priv2); 178 iounmap(spu->problem); 179 iounmap((__force u8 __iomem *)spu->local_store); 180 iounmap(spu_pdata(spu)->shadow); 181 } 182 183 /** 184 * setup_areas - Map the spu regions into the address space. 185 * 186 * The current HV requires the spu shadow regs to be mapped with the 187 * PTE page protection bits set as read-only. 188 */ 189 190 static int __init setup_areas(struct spu *spu) 191 { 192 struct table {char* name; unsigned long addr; unsigned long size;}; 193 unsigned long shadow_flags = pgprot_val(pgprot_noncached_wc(PAGE_KERNEL_RO)); 194 195 spu_pdata(spu)->shadow = ioremap_prot(spu_pdata(spu)->shadow_addr, 196 sizeof(struct spe_shadow), shadow_flags); 197 if (!spu_pdata(spu)->shadow) { 198 pr_debug("%s:%d: ioremap shadow failed\n", __func__, __LINE__); 199 goto fail_ioremap; 200 } 201 202 spu->local_store = (__force void *)ioremap_wc(spu->local_store_phys, LS_SIZE); 203 204 if (!spu->local_store) { 205 pr_debug("%s:%d: ioremap local_store failed\n", 206 __func__, __LINE__); 207 goto fail_ioremap; 208 } 209 210 spu->problem = ioremap(spu->problem_phys, 211 sizeof(struct spu_problem)); 212 213 if (!spu->problem) { 214 pr_debug("%s:%d: ioremap problem failed\n", __func__, __LINE__); 215 goto fail_ioremap; 216 } 217 218 spu->priv2 = ioremap(spu_pdata(spu)->priv2_addr, 219 sizeof(struct spu_priv2)); 220 221 if (!spu->priv2) { 222 pr_debug("%s:%d: ioremap priv2 failed\n", __func__, __LINE__); 223 goto fail_ioremap; 224 } 225 226 dump_areas(spu_pdata(spu)->spe_id, spu_pdata(spu)->priv2_addr, 227 spu->problem_phys, spu->local_store_phys, 228 spu_pdata(spu)->shadow_addr); 229 dump_areas(spu_pdata(spu)->spe_id, (unsigned long)spu->priv2, 230 (unsigned long)spu->problem, (unsigned long)spu->local_store, 231 (unsigned long)spu_pdata(spu)->shadow); 232 233 return 0; 234 235 fail_ioremap: 236 spu_unmap(spu); 237 238 return -ENOMEM; 239 } 240 241 static int __init setup_interrupts(struct spu *spu) 242 { 243 int result; 244 245 result = ps3_spe_irq_setup(PS3_BINDING_CPU_ANY, spu_pdata(spu)->spe_id, 246 0, &spu->irqs[0]); 247 248 if (result) 249 goto fail_alloc_0; 250 251 result = ps3_spe_irq_setup(PS3_BINDING_CPU_ANY, spu_pdata(spu)->spe_id, 252 1, &spu->irqs[1]); 253 254 if (result) 255 goto fail_alloc_1; 256 257 result = ps3_spe_irq_setup(PS3_BINDING_CPU_ANY, spu_pdata(spu)->spe_id, 258 2, &spu->irqs[2]); 259 260 if (result) 261 goto fail_alloc_2; 262 263 return result; 264 265 fail_alloc_2: 266 ps3_spe_irq_destroy(spu->irqs[1]); 267 fail_alloc_1: 268 ps3_spe_irq_destroy(spu->irqs[0]); 269 fail_alloc_0: 270 spu->irqs[0] = spu->irqs[1] = spu->irqs[2] = 0; 271 return result; 272 } 273 274 static int __init enable_spu(struct spu *spu) 275 { 276 int result; 277 278 result = lv1_enable_logical_spe(spu_pdata(spu)->spe_id, 279 spu_pdata(spu)->resource_id); 280 281 if (result) { 282 pr_debug("%s:%d: lv1_enable_logical_spe failed: %s\n", 283 __func__, __LINE__, ps3_result(result)); 284 goto fail_enable; 285 } 286 287 result = setup_areas(spu); 288 289 if (result) 290 goto fail_areas; 291 292 result = setup_interrupts(spu); 293 294 if (result) 295 goto fail_interrupts; 296 297 return 0; 298 299 fail_interrupts: 300 spu_unmap(spu); 301 fail_areas: 302 lv1_disable_logical_spe(spu_pdata(spu)->spe_id, 0); 303 fail_enable: 304 return result; 305 } 306 307 static int ps3_destroy_spu(struct spu *spu) 308 { 309 int result; 310 311 pr_debug("%s:%d spu_%d\n", __func__, __LINE__, spu->number); 312 313 result = lv1_disable_logical_spe(spu_pdata(spu)->spe_id, 0); 314 BUG_ON(result); 315 316 ps3_spe_irq_destroy(spu->irqs[2]); 317 ps3_spe_irq_destroy(spu->irqs[1]); 318 ps3_spe_irq_destroy(spu->irqs[0]); 319 320 spu->irqs[0] = spu->irqs[1] = spu->irqs[2] = 0; 321 322 spu_unmap(spu); 323 324 result = lv1_destruct_logical_spe(spu_pdata(spu)->spe_id); 325 BUG_ON(result); 326 327 kfree(spu->pdata); 328 spu->pdata = NULL; 329 330 return 0; 331 } 332 333 static int __init ps3_create_spu(struct spu *spu, void *data) 334 { 335 int result; 336 337 pr_debug("%s:%d spu_%d\n", __func__, __LINE__, spu->number); 338 339 spu->pdata = kzalloc(sizeof(struct spu_pdata), 340 GFP_KERNEL); 341 342 if (!spu->pdata) { 343 result = -ENOMEM; 344 goto fail_malloc; 345 } 346 347 spu_pdata(spu)->resource_id = (unsigned long)data; 348 349 /* Init cached reg values to HV defaults. */ 350 351 spu_pdata(spu)->cache.sr1 = 0x33; 352 353 result = construct_spu(spu); 354 355 if (result) 356 goto fail_construct; 357 358 /* For now, just go ahead and enable it. */ 359 360 result = enable_spu(spu); 361 362 if (result) 363 goto fail_enable; 364 365 /* Make sure the spu is in SPE_EX_STATE_EXECUTED. */ 366 367 /* need something better here!!! */ 368 while (in_be64(&spu_pdata(spu)->shadow->spe_execution_status) 369 != SPE_EX_STATE_EXECUTED) 370 (void)0; 371 372 return result; 373 374 fail_enable: 375 fail_construct: 376 ps3_destroy_spu(spu); 377 fail_malloc: 378 return result; 379 } 380 381 static int __init ps3_enumerate_spus(int (*fn)(void *data)) 382 { 383 int result; 384 unsigned int num_resource_id; 385 unsigned int i; 386 387 result = ps3_repository_read_num_spu_resource_id(&num_resource_id); 388 389 pr_debug("%s:%d: num_resource_id %u\n", __func__, __LINE__, 390 num_resource_id); 391 392 /* 393 * For now, just create logical spus equal to the number 394 * of physical spus reserved for the partition. 395 */ 396 397 for (i = 0; i < num_resource_id; i++) { 398 enum ps3_spu_resource_type resource_type; 399 unsigned int resource_id; 400 401 result = ps3_repository_read_spu_resource_id(i, 402 &resource_type, &resource_id); 403 404 if (result) 405 break; 406 407 if (resource_type == PS3_SPU_RESOURCE_TYPE_EXCLUSIVE) { 408 result = fn((void*)(unsigned long)resource_id); 409 410 if (result) 411 break; 412 } 413 } 414 415 if (result) { 416 printk(KERN_WARNING "%s:%d: Error initializing spus\n", 417 __func__, __LINE__); 418 return result; 419 } 420 421 return num_resource_id; 422 } 423 424 static int ps3_init_affinity(void) 425 { 426 return 0; 427 } 428 429 /** 430 * ps3_enable_spu - Enable SPU run control. 431 * 432 * An outstanding enhancement for the PS3 would be to add a guard to check 433 * for incorrect access to the spu problem state when the spu context is 434 * disabled. This check could be implemented with a flag added to the spu 435 * context that would inhibit mapping problem state pages, and a routine 436 * to unmap spu problem state pages. When the spu is enabled with 437 * ps3_enable_spu() the flag would be set allowing pages to be mapped, 438 * and when the spu is disabled with ps3_disable_spu() the flag would be 439 * cleared and the mapped problem state pages would be unmapped. 440 */ 441 442 static void ps3_enable_spu(struct spu_context *ctx) 443 { 444 } 445 446 static void ps3_disable_spu(struct spu_context *ctx) 447 { 448 ctx->ops->runcntl_stop(ctx); 449 } 450 451 static const struct spu_management_ops spu_management_ps3_ops = { 452 .enumerate_spus = ps3_enumerate_spus, 453 .create_spu = ps3_create_spu, 454 .destroy_spu = ps3_destroy_spu, 455 .enable_spu = ps3_enable_spu, 456 .disable_spu = ps3_disable_spu, 457 .init_affinity = ps3_init_affinity, 458 }; 459 460 /* spu_priv1_ops */ 461 462 static void int_mask_and(struct spu *spu, int class, u64 mask) 463 { 464 u64 old_mask; 465 466 /* are these serialized by caller??? */ 467 old_mask = spu_int_mask_get(spu, class); 468 spu_int_mask_set(spu, class, old_mask & mask); 469 } 470 471 static void int_mask_or(struct spu *spu, int class, u64 mask) 472 { 473 u64 old_mask; 474 475 old_mask = spu_int_mask_get(spu, class); 476 spu_int_mask_set(spu, class, old_mask | mask); 477 } 478 479 static void int_mask_set(struct spu *spu, int class, u64 mask) 480 { 481 spu_pdata(spu)->cache.masks[class] = mask; 482 lv1_set_spe_interrupt_mask(spu_pdata(spu)->spe_id, class, 483 spu_pdata(spu)->cache.masks[class]); 484 } 485 486 static u64 int_mask_get(struct spu *spu, int class) 487 { 488 return spu_pdata(spu)->cache.masks[class]; 489 } 490 491 static void int_stat_clear(struct spu *spu, int class, u64 stat) 492 { 493 /* Note that MFC_DSISR will be cleared when class1[MF] is set. */ 494 495 lv1_clear_spe_interrupt_status(spu_pdata(spu)->spe_id, class, 496 stat, 0); 497 } 498 499 static u64 int_stat_get(struct spu *spu, int class) 500 { 501 u64 stat; 502 503 lv1_get_spe_interrupt_status(spu_pdata(spu)->spe_id, class, &stat); 504 return stat; 505 } 506 507 static void cpu_affinity_set(struct spu *spu, int cpu) 508 { 509 /* No support. */ 510 } 511 512 static u64 mfc_dar_get(struct spu *spu) 513 { 514 return in_be64(&spu_pdata(spu)->shadow->mfc_dar_RW); 515 } 516 517 static void mfc_dsisr_set(struct spu *spu, u64 dsisr) 518 { 519 /* Nothing to do, cleared in int_stat_clear(). */ 520 } 521 522 static u64 mfc_dsisr_get(struct spu *spu) 523 { 524 return in_be64(&spu_pdata(spu)->shadow->mfc_dsisr_RW); 525 } 526 527 static void mfc_sdr_setup(struct spu *spu) 528 { 529 /* Nothing to do. */ 530 } 531 532 static void mfc_sr1_set(struct spu *spu, u64 sr1) 533 { 534 /* Check bits allowed by HV. */ 535 536 static const u64 allowed = ~(MFC_STATE1_LOCAL_STORAGE_DECODE_MASK 537 | MFC_STATE1_PROBLEM_STATE_MASK); 538 539 BUG_ON((sr1 & allowed) != (spu_pdata(spu)->cache.sr1 & allowed)); 540 541 spu_pdata(spu)->cache.sr1 = sr1; 542 lv1_set_spe_privilege_state_area_1_register( 543 spu_pdata(spu)->spe_id, 544 offsetof(struct spu_priv1, mfc_sr1_RW), 545 spu_pdata(spu)->cache.sr1); 546 } 547 548 static u64 mfc_sr1_get(struct spu *spu) 549 { 550 return spu_pdata(spu)->cache.sr1; 551 } 552 553 static void mfc_tclass_id_set(struct spu *spu, u64 tclass_id) 554 { 555 spu_pdata(spu)->cache.tclass_id = tclass_id; 556 lv1_set_spe_privilege_state_area_1_register( 557 spu_pdata(spu)->spe_id, 558 offsetof(struct spu_priv1, mfc_tclass_id_RW), 559 spu_pdata(spu)->cache.tclass_id); 560 } 561 562 static u64 mfc_tclass_id_get(struct spu *spu) 563 { 564 return spu_pdata(spu)->cache.tclass_id; 565 } 566 567 static void tlb_invalidate(struct spu *spu) 568 { 569 /* Nothing to do. */ 570 } 571 572 static void resource_allocation_groupID_set(struct spu *spu, u64 id) 573 { 574 /* No support. */ 575 } 576 577 static u64 resource_allocation_groupID_get(struct spu *spu) 578 { 579 return 0; /* No support. */ 580 } 581 582 static void resource_allocation_enable_set(struct spu *spu, u64 enable) 583 { 584 /* No support. */ 585 } 586 587 static u64 resource_allocation_enable_get(struct spu *spu) 588 { 589 return 0; /* No support. */ 590 } 591 592 static const struct spu_priv1_ops spu_priv1_ps3_ops = { 593 .int_mask_and = int_mask_and, 594 .int_mask_or = int_mask_or, 595 .int_mask_set = int_mask_set, 596 .int_mask_get = int_mask_get, 597 .int_stat_clear = int_stat_clear, 598 .int_stat_get = int_stat_get, 599 .cpu_affinity_set = cpu_affinity_set, 600 .mfc_dar_get = mfc_dar_get, 601 .mfc_dsisr_set = mfc_dsisr_set, 602 .mfc_dsisr_get = mfc_dsisr_get, 603 .mfc_sdr_setup = mfc_sdr_setup, 604 .mfc_sr1_set = mfc_sr1_set, 605 .mfc_sr1_get = mfc_sr1_get, 606 .mfc_tclass_id_set = mfc_tclass_id_set, 607 .mfc_tclass_id_get = mfc_tclass_id_get, 608 .tlb_invalidate = tlb_invalidate, 609 .resource_allocation_groupID_set = resource_allocation_groupID_set, 610 .resource_allocation_groupID_get = resource_allocation_groupID_get, 611 .resource_allocation_enable_set = resource_allocation_enable_set, 612 .resource_allocation_enable_get = resource_allocation_enable_get, 613 }; 614 615 void ps3_spu_set_platform(void) 616 { 617 spu_priv1_ops = &spu_priv1_ps3_ops; 618 spu_management_ops = &spu_management_ps3_ops; 619 } 620