1// SPDX-License-Identifier: MIT 2/* 3 * Copyright �� 2014 Intel Corporation 4 */ 5 6#include "gem/i915_gem_lmem.h" 7 8#include "gen8_engine_cs.h" 9#include "i915_drv.h" 10#include "i915_perf.h" 11#include "i915_reg.h" 12#include "intel_context.h" 13#include "intel_engine.h" 14#include "intel_engine_regs.h" 15#include "intel_gpu_commands.h" 16#include "intel_gt.h" 17#include "intel_gt_regs.h" 18#include "intel_lrc.h" 19#include "intel_lrc_reg.h" 20#include "intel_ring.h" 21#include "shmem_utils.h" 22 23/* 24 * The per-platform tables are u8-encoded in @data. Decode @data and set the 25 * addresses' offset and commands in @regs. The following encoding is used 26 * for each byte. There are 2 steps: decoding commands and decoding addresses. 27 * 28 * Commands: 29 * [7]: create NOPs - number of NOPs are set in lower bits 30 * [6]: When creating MI_LOAD_REGISTER_IMM command, allow to set 31 * MI_LRI_FORCE_POSTED 32 * [5:0]: Number of NOPs or registers to set values to in case of 33 * MI_LOAD_REGISTER_IMM 34 * 35 * Addresses: these are decoded after a MI_LOAD_REGISTER_IMM command by "count" 36 * number of registers. They are set by using the REG/REG16 macros: the former 37 * is used for offsets smaller than 0x200 while the latter is for values bigger 38 * than that. Those macros already set all the bits documented below correctly: 39 * 40 * [7]: When a register offset needs more than 6 bits, use additional bytes, to 41 * follow, for the lower bits 42 * [6:0]: Register offset, without considering the engine base. 43 * 44 * This function only tweaks the commands and register offsets. Values are not 45 * filled out. 46 */ 47static void set_offsets(u32 *regs, 48 const u8 *data, 49 const struct intel_engine_cs *engine, 50 bool close) 51#define NOP(x) (BIT(7) | (x)) 52#define LRI(count, flags) ((flags) << 6 | (count) | BUILD_BUG_ON_ZERO(count >= BIT(6))) 53#define POSTED BIT(0) 54#define REG(x) (((x) >> 2) | BUILD_BUG_ON_ZERO(x >= 0x200)) 55#define REG16(x) \ 56 (((x) >> 9) | BIT(7) | BUILD_BUG_ON_ZERO(x >= 0x10000)), \ 57 (((x) >> 2) & 0x7f) 58#define END 0 59{ 60 const u32 base = engine->mmio_base; 61 62 while (*data) { 63 u8 count, flags; 64 65 if (*data & BIT(7)) { /* skip */ 66 count = *data++ & ~BIT(7); 67 regs += count; 68 continue; 69 } 70 71 count = *data & 0x3f; 72 flags = *data >> 6; 73 data++; 74 75 *regs = MI_LOAD_REGISTER_IMM(count); 76 if (flags & POSTED) 77 *regs |= MI_LRI_FORCE_POSTED; 78 if (GRAPHICS_VER(engine->i915) >= 11) 79 *regs |= MI_LRI_LRM_CS_MMIO; 80 regs++; 81 82 GEM_BUG_ON(!count); 83 do { 84 u32 offset = 0; 85 u8 v; 86 87 do { 88 v = *data++; 89 offset <<= 7; 90 offset |= v & ~BIT(7); 91 } while (v & BIT(7)); 92 93 regs[0] = base + (offset << 2); 94 regs += 2; 95 } while (--count); 96 } 97 98 if (close) { 99 /* Close the batch; used mainly by live_lrc_layout() */ 100 *regs = MI_BATCH_BUFFER_END; 101 if (GRAPHICS_VER(engine->i915) >= 11) 102 *regs |= BIT(0); 103 } 104} 105 106static const u8 gen8_xcs_offsets[] = { 107 NOP(1), 108 LRI(11, 0), 109 REG16(0x244), 110 REG(0x034), 111 REG(0x030), 112 REG(0x038), 113 REG(0x03c), 114 REG(0x168), 115 REG(0x140), 116 REG(0x110), 117 REG(0x11c), 118 REG(0x114), 119 REG(0x118), 120 121 NOP(9), 122 LRI(9, 0), 123 REG16(0x3a8), 124 REG16(0x28c), 125 REG16(0x288), 126 REG16(0x284), 127 REG16(0x280), 128 REG16(0x27c), 129 REG16(0x278), 130 REG16(0x274), 131 REG16(0x270), 132 133 NOP(13), 134 LRI(2, 0), 135 REG16(0x200), 136 REG(0x028), 137 138 END 139}; 140 141static const u8 gen9_xcs_offsets[] = { 142 NOP(1), 143 LRI(14, POSTED), 144 REG16(0x244), 145 REG(0x034), 146 REG(0x030), 147 REG(0x038), 148 REG(0x03c), 149 REG(0x168), 150 REG(0x140), 151 REG(0x110), 152 REG(0x11c), 153 REG(0x114), 154 REG(0x118), 155 REG(0x1c0), 156 REG(0x1c4), 157 REG(0x1c8), 158 159 NOP(3), 160 LRI(9, POSTED), 161 REG16(0x3a8), 162 REG16(0x28c), 163 REG16(0x288), 164 REG16(0x284), 165 REG16(0x280), 166 REG16(0x27c), 167 REG16(0x278), 168 REG16(0x274), 169 REG16(0x270), 170 171 NOP(13), 172 LRI(1, POSTED), 173 REG16(0x200), 174 175 NOP(13), 176 LRI(44, POSTED), 177 REG(0x028), 178 REG(0x09c), 179 REG(0x0c0), 180 REG(0x178), 181 REG(0x17c), 182 REG16(0x358), 183 REG(0x170), 184 REG(0x150), 185 REG(0x154), 186 REG(0x158), 187 REG16(0x41c), 188 REG16(0x600), 189 REG16(0x604), 190 REG16(0x608), 191 REG16(0x60c), 192 REG16(0x610), 193 REG16(0x614), 194 REG16(0x618), 195 REG16(0x61c), 196 REG16(0x620), 197 REG16(0x624), 198 REG16(0x628), 199 REG16(0x62c), 200 REG16(0x630), 201 REG16(0x634), 202 REG16(0x638), 203 REG16(0x63c), 204 REG16(0x640), 205 REG16(0x644), 206 REG16(0x648), 207 REG16(0x64c), 208 REG16(0x650), 209 REG16(0x654), 210 REG16(0x658), 211 REG16(0x65c), 212 REG16(0x660), 213 REG16(0x664), 214 REG16(0x668), 215 REG16(0x66c), 216 REG16(0x670), 217 REG16(0x674), 218 REG16(0x678), 219 REG16(0x67c), 220 REG(0x068), 221 222 END 223}; 224 225static const u8 gen12_xcs_offsets[] = { 226 NOP(1), 227 LRI(13, POSTED), 228 REG16(0x244), 229 REG(0x034), 230 REG(0x030), 231 REG(0x038), 232 REG(0x03c), 233 REG(0x168), 234 REG(0x140), 235 REG(0x110), 236 REG(0x1c0), 237 REG(0x1c4), 238 REG(0x1c8), 239 REG(0x180), 240 REG16(0x2b4), 241 242 NOP(5), 243 LRI(9, POSTED), 244 REG16(0x3a8), 245 REG16(0x28c), 246 REG16(0x288), 247 REG16(0x284), 248 REG16(0x280), 249 REG16(0x27c), 250 REG16(0x278), 251 REG16(0x274), 252 REG16(0x270), 253 254 END 255}; 256 257static const u8 dg2_xcs_offsets[] = { 258 NOP(1), 259 LRI(15, POSTED), 260 REG16(0x244), 261 REG(0x034), 262 REG(0x030), 263 REG(0x038), 264 REG(0x03c), 265 REG(0x168), 266 REG(0x140), 267 REG(0x110), 268 REG(0x1c0), 269 REG(0x1c4), 270 REG(0x1c8), 271 REG(0x180), 272 REG16(0x2b4), 273 REG(0x120), 274 REG(0x124), 275 276 NOP(1), 277 LRI(9, POSTED), 278 REG16(0x3a8), 279 REG16(0x28c), 280 REG16(0x288), 281 REG16(0x284), 282 REG16(0x280), 283 REG16(0x27c), 284 REG16(0x278), 285 REG16(0x274), 286 REG16(0x270), 287 288 END 289}; 290 291static const u8 gen8_rcs_offsets[] = { 292 NOP(1), 293 LRI(14, POSTED), 294 REG16(0x244), 295 REG(0x034), 296 REG(0x030), 297 REG(0x038), 298 REG(0x03c), 299 REG(0x168), 300 REG(0x140), 301 REG(0x110), 302 REG(0x11c), 303 REG(0x114), 304 REG(0x118), 305 REG(0x1c0), 306 REG(0x1c4), 307 REG(0x1c8), 308 309 NOP(3), 310 LRI(9, POSTED), 311 REG16(0x3a8), 312 REG16(0x28c), 313 REG16(0x288), 314 REG16(0x284), 315 REG16(0x280), 316 REG16(0x27c), 317 REG16(0x278), 318 REG16(0x274), 319 REG16(0x270), 320 321 NOP(13), 322 LRI(1, 0), 323 REG(0x0c8), 324 325 END 326}; 327 328static const u8 gen9_rcs_offsets[] = { 329 NOP(1), 330 LRI(14, POSTED), 331 REG16(0x244), 332 REG(0x34), 333 REG(0x30), 334 REG(0x38), 335 REG(0x3c), 336 REG(0x168), 337 REG(0x140), 338 REG(0x110), 339 REG(0x11c), 340 REG(0x114), 341 REG(0x118), 342 REG(0x1c0), 343 REG(0x1c4), 344 REG(0x1c8), 345 346 NOP(3), 347 LRI(9, POSTED), 348 REG16(0x3a8), 349 REG16(0x28c), 350 REG16(0x288), 351 REG16(0x284), 352 REG16(0x280), 353 REG16(0x27c), 354 REG16(0x278), 355 REG16(0x274), 356 REG16(0x270), 357 358 NOP(13), 359 LRI(1, 0), 360 REG(0xc8), 361 362 NOP(13), 363 LRI(44, POSTED), 364 REG(0x28), 365 REG(0x9c), 366 REG(0xc0), 367 REG(0x178), 368 REG(0x17c), 369 REG16(0x358), 370 REG(0x170), 371 REG(0x150), 372 REG(0x154), 373 REG(0x158), 374 REG16(0x41c), 375 REG16(0x600), 376 REG16(0x604), 377 REG16(0x608), 378 REG16(0x60c), 379 REG16(0x610), 380 REG16(0x614), 381 REG16(0x618), 382 REG16(0x61c), 383 REG16(0x620), 384 REG16(0x624), 385 REG16(0x628), 386 REG16(0x62c), 387 REG16(0x630), 388 REG16(0x634), 389 REG16(0x638), 390 REG16(0x63c), 391 REG16(0x640), 392 REG16(0x644), 393 REG16(0x648), 394 REG16(0x64c), 395 REG16(0x650), 396 REG16(0x654), 397 REG16(0x658), 398 REG16(0x65c), 399 REG16(0x660), 400 REG16(0x664), 401 REG16(0x668), 402 REG16(0x66c), 403 REG16(0x670), 404 REG16(0x674), 405 REG16(0x678), 406 REG16(0x67c), 407 REG(0x68), 408 409 END 410}; 411 412static const u8 gen11_rcs_offsets[] = { 413 NOP(1), 414 LRI(15, POSTED), 415 REG16(0x244), 416 REG(0x034), 417 REG(0x030), 418 REG(0x038), 419 REG(0x03c), 420 REG(0x168), 421 REG(0x140), 422 REG(0x110), 423 REG(0x11c), 424 REG(0x114), 425 REG(0x118), 426 REG(0x1c0), 427 REG(0x1c4), 428 REG(0x1c8), 429 REG(0x180), 430 431 NOP(1), 432 LRI(9, POSTED), 433 REG16(0x3a8), 434 REG16(0x28c), 435 REG16(0x288), 436 REG16(0x284), 437 REG16(0x280), 438 REG16(0x27c), 439 REG16(0x278), 440 REG16(0x274), 441 REG16(0x270), 442 443 LRI(1, POSTED), 444 REG(0x1b0), 445 446 NOP(10), 447 LRI(1, 0), 448 REG(0x0c8), 449 450 END 451}; 452 453static const u8 gen12_rcs_offsets[] = { 454 NOP(1), 455 LRI(13, POSTED), 456 REG16(0x244), 457 REG(0x034), 458 REG(0x030), 459 REG(0x038), 460 REG(0x03c), 461 REG(0x168), 462 REG(0x140), 463 REG(0x110), 464 REG(0x1c0), 465 REG(0x1c4), 466 REG(0x1c8), 467 REG(0x180), 468 REG16(0x2b4), 469 470 NOP(5), 471 LRI(9, POSTED), 472 REG16(0x3a8), 473 REG16(0x28c), 474 REG16(0x288), 475 REG16(0x284), 476 REG16(0x280), 477 REG16(0x27c), 478 REG16(0x278), 479 REG16(0x274), 480 REG16(0x270), 481 482 LRI(3, POSTED), 483 REG(0x1b0), 484 REG16(0x5a8), 485 REG16(0x5ac), 486 487 NOP(6), 488 LRI(1, 0), 489 REG(0x0c8), 490 NOP(3 + 9 + 1), 491 492 LRI(51, POSTED), 493 REG16(0x588), 494 REG16(0x588), 495 REG16(0x588), 496 REG16(0x588), 497 REG16(0x588), 498 REG16(0x588), 499 REG(0x028), 500 REG(0x09c), 501 REG(0x0c0), 502 REG(0x178), 503 REG(0x17c), 504 REG16(0x358), 505 REG(0x170), 506 REG(0x150), 507 REG(0x154), 508 REG(0x158), 509 REG16(0x41c), 510 REG16(0x600), 511 REG16(0x604), 512 REG16(0x608), 513 REG16(0x60c), 514 REG16(0x610), 515 REG16(0x614), 516 REG16(0x618), 517 REG16(0x61c), 518 REG16(0x620), 519 REG16(0x624), 520 REG16(0x628), 521 REG16(0x62c), 522 REG16(0x630), 523 REG16(0x634), 524 REG16(0x638), 525 REG16(0x63c), 526 REG16(0x640), 527 REG16(0x644), 528 REG16(0x648), 529 REG16(0x64c), 530 REG16(0x650), 531 REG16(0x654), 532 REG16(0x658), 533 REG16(0x65c), 534 REG16(0x660), 535 REG16(0x664), 536 REG16(0x668), 537 REG16(0x66c), 538 REG16(0x670), 539 REG16(0x674), 540 REG16(0x678), 541 REG16(0x67c), 542 REG(0x068), 543 REG(0x084), 544 NOP(1), 545 546 END 547}; 548 549static const u8 xehp_rcs_offsets[] = { 550 NOP(1), 551 LRI(13, POSTED), 552 REG16(0x244), 553 REG(0x034), 554 REG(0x030), 555 REG(0x038), 556 REG(0x03c), 557 REG(0x168), 558 REG(0x140), 559 REG(0x110), 560 REG(0x1c0), 561 REG(0x1c4), 562 REG(0x1c8), 563 REG(0x180), 564 REG16(0x2b4), 565 566 NOP(5), 567 LRI(9, POSTED), 568 REG16(0x3a8), 569 REG16(0x28c), 570 REG16(0x288), 571 REG16(0x284), 572 REG16(0x280), 573 REG16(0x27c), 574 REG16(0x278), 575 REG16(0x274), 576 REG16(0x270), 577 578 LRI(3, POSTED), 579 REG(0x1b0), 580 REG16(0x5a8), 581 REG16(0x5ac), 582 583 NOP(6), 584 LRI(1, 0), 585 REG(0x0c8), 586 587 END 588}; 589 590static const u8 dg2_rcs_offsets[] = { 591 NOP(1), 592 LRI(15, POSTED), 593 REG16(0x244), 594 REG(0x034), 595 REG(0x030), 596 REG(0x038), 597 REG(0x03c), 598 REG(0x168), 599 REG(0x140), 600 REG(0x110), 601 REG(0x1c0), 602 REG(0x1c4), 603 REG(0x1c8), 604 REG(0x180), 605 REG16(0x2b4), 606 REG(0x120), 607 REG(0x124), 608 609 NOP(1), 610 LRI(9, POSTED), 611 REG16(0x3a8), 612 REG16(0x28c), 613 REG16(0x288), 614 REG16(0x284), 615 REG16(0x280), 616 REG16(0x27c), 617 REG16(0x278), 618 REG16(0x274), 619 REG16(0x270), 620 621 LRI(3, POSTED), 622 REG(0x1b0), 623 REG16(0x5a8), 624 REG16(0x5ac), 625 626 NOP(6), 627 LRI(1, 0), 628 REG(0x0c8), 629 630 END 631}; 632 633static const u8 mtl_rcs_offsets[] = { 634 NOP(1), 635 LRI(15, POSTED), 636 REG16(0x244), 637 REG(0x034), 638 REG(0x030), 639 REG(0x038), 640 REG(0x03c), 641 REG(0x168), 642 REG(0x140), 643 REG(0x110), 644 REG(0x1c0), 645 REG(0x1c4), 646 REG(0x1c8), 647 REG(0x180), 648 REG16(0x2b4), 649 REG(0x120), 650 REG(0x124), 651 652 NOP(1), 653 LRI(9, POSTED), 654 REG16(0x3a8), 655 REG16(0x28c), 656 REG16(0x288), 657 REG16(0x284), 658 REG16(0x280), 659 REG16(0x27c), 660 REG16(0x278), 661 REG16(0x274), 662 REG16(0x270), 663 664 NOP(2), 665 LRI(2, POSTED), 666 REG16(0x5a8), 667 REG16(0x5ac), 668 669 NOP(6), 670 LRI(1, 0), 671 REG(0x0c8), 672 673 END 674}; 675 676#undef END 677#undef REG16 678#undef REG 679#undef LRI 680#undef NOP 681 682static const u8 *reg_offsets(const struct intel_engine_cs *engine) 683{ 684 /* 685 * The gen12+ lists only have the registers we program in the basic 686 * default state. We rely on the context image using relative 687 * addressing to automatic fixup the register state between the 688 * physical engines for virtual engine. 689 */ 690 GEM_BUG_ON(GRAPHICS_VER(engine->i915) >= 12 && 691 !intel_engine_has_relative_mmio(engine)); 692 693 if (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE) { 694 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 70)) 695 return mtl_rcs_offsets; 696 else if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 55)) 697 return dg2_rcs_offsets; 698 else if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 699 return xehp_rcs_offsets; 700 else if (GRAPHICS_VER(engine->i915) >= 12) 701 return gen12_rcs_offsets; 702 else if (GRAPHICS_VER(engine->i915) >= 11) 703 return gen11_rcs_offsets; 704 else if (GRAPHICS_VER(engine->i915) >= 9) 705 return gen9_rcs_offsets; 706 else 707 return gen8_rcs_offsets; 708 } else { 709 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 55)) 710 return dg2_xcs_offsets; 711 else if (GRAPHICS_VER(engine->i915) >= 12) 712 return gen12_xcs_offsets; 713 else if (GRAPHICS_VER(engine->i915) >= 9) 714 return gen9_xcs_offsets; 715 else 716 return gen8_xcs_offsets; 717 } 718} 719 720static int lrc_ring_mi_mode(const struct intel_engine_cs *engine) 721{ 722 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 723 return 0x70; 724 else if (GRAPHICS_VER(engine->i915) >= 12) 725 return 0x60; 726 else if (GRAPHICS_VER(engine->i915) >= 9) 727 return 0x54; 728 else if (engine->class == RENDER_CLASS) 729 return 0x58; 730 else 731 return -1; 732} 733 734static int lrc_ring_bb_offset(const struct intel_engine_cs *engine) 735{ 736 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 737 return 0x80; 738 else if (GRAPHICS_VER(engine->i915) >= 12) 739 return 0x70; 740 else if (GRAPHICS_VER(engine->i915) >= 9) 741 return 0x64; 742 else if (GRAPHICS_VER(engine->i915) >= 8 && 743 engine->class == RENDER_CLASS) 744 return 0xc4; 745 else 746 return -1; 747} 748 749static int lrc_ring_gpr0(const struct intel_engine_cs *engine) 750{ 751 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 752 return 0x84; 753 else if (GRAPHICS_VER(engine->i915) >= 12) 754 return 0x74; 755 else if (GRAPHICS_VER(engine->i915) >= 9) 756 return 0x68; 757 else if (engine->class == RENDER_CLASS) 758 return 0xd8; 759 else 760 return -1; 761} 762 763static int lrc_ring_wa_bb_per_ctx(const struct intel_engine_cs *engine) 764{ 765 if (GRAPHICS_VER(engine->i915) >= 12) 766 return 0x12; 767 else if (GRAPHICS_VER(engine->i915) >= 9 || engine->class == RENDER_CLASS) 768 return 0x18; 769 else 770 return -1; 771} 772 773static int lrc_ring_indirect_ptr(const struct intel_engine_cs *engine) 774{ 775 int x; 776 777 x = lrc_ring_wa_bb_per_ctx(engine); 778 if (x < 0) 779 return x; 780 781 return x + 2; 782} 783 784static int lrc_ring_indirect_offset(const struct intel_engine_cs *engine) 785{ 786 int x; 787 788 x = lrc_ring_indirect_ptr(engine); 789 if (x < 0) 790 return x; 791 792 return x + 2; 793} 794 795static int lrc_ring_cmd_buf_cctl(const struct intel_engine_cs *engine) 796{ 797 798 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 799 /* 800 * Note that the CSFE context has a dummy slot for CMD_BUF_CCTL 801 * simply to match the RCS context image layout. 802 */ 803 return 0xc6; 804 else if (engine->class != RENDER_CLASS) 805 return -1; 806 else if (GRAPHICS_VER(engine->i915) >= 12) 807 return 0xb6; 808 else if (GRAPHICS_VER(engine->i915) >= 11) 809 return 0xaa; 810 else 811 return -1; 812} 813 814static u32 815lrc_ring_indirect_offset_default(const struct intel_engine_cs *engine) 816{ 817 if (GRAPHICS_VER(engine->i915) >= 12) 818 return GEN12_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 819 else if (GRAPHICS_VER(engine->i915) >= 11) 820 return GEN11_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 821 else if (GRAPHICS_VER(engine->i915) >= 9) 822 return GEN9_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 823 else if (GRAPHICS_VER(engine->i915) >= 8) 824 return GEN8_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 825 826 GEM_BUG_ON(GRAPHICS_VER(engine->i915) < 8); 827 828 return 0; 829} 830 831static void 832lrc_setup_indirect_ctx(u32 *regs, 833 const struct intel_engine_cs *engine, 834 u32 ctx_bb_ggtt_addr, 835 u32 size) 836{ 837 GEM_BUG_ON(!size); 838 GEM_BUG_ON(!IS_ALIGNED(size, CACHELINE_BYTES)); 839 GEM_BUG_ON(lrc_ring_indirect_ptr(engine) == -1); 840 regs[lrc_ring_indirect_ptr(engine) + 1] = 841 ctx_bb_ggtt_addr | (size / CACHELINE_BYTES); 842 843 GEM_BUG_ON(lrc_ring_indirect_offset(engine) == -1); 844 regs[lrc_ring_indirect_offset(engine) + 1] = 845 lrc_ring_indirect_offset_default(engine) << 6; 846} 847 848static void init_common_regs(u32 * const regs, 849 const struct intel_context *ce, 850 const struct intel_engine_cs *engine, 851 bool inhibit) 852{ 853 u32 ctl; 854 int loc; 855 856 ctl = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH); 857 ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); 858 if (inhibit) 859 ctl |= CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT; 860 if (GRAPHICS_VER(engine->i915) < 11) 861 ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT | 862 CTX_CTRL_RS_CTX_ENABLE); 863 regs[CTX_CONTEXT_CONTROL] = ctl; 864 865 regs[CTX_TIMESTAMP] = ce->stats.runtime.last; 866 867 loc = lrc_ring_bb_offset(engine); 868 if (loc != -1) 869 regs[loc + 1] = 0; 870} 871 872static void init_wa_bb_regs(u32 * const regs, 873 const struct intel_engine_cs *engine) 874{ 875 const struct i915_ctx_workarounds * const wa_ctx = &engine->wa_ctx; 876 877 if (wa_ctx->per_ctx.size) { 878 const u32 ggtt_offset = i915_ggtt_offset(wa_ctx->vma); 879 880 GEM_BUG_ON(lrc_ring_wa_bb_per_ctx(engine) == -1); 881 regs[lrc_ring_wa_bb_per_ctx(engine) + 1] = 882 (ggtt_offset + wa_ctx->per_ctx.offset) | 0x01; 883 } 884 885 if (wa_ctx->indirect_ctx.size) { 886 lrc_setup_indirect_ctx(regs, engine, 887 i915_ggtt_offset(wa_ctx->vma) + 888 wa_ctx->indirect_ctx.offset, 889 wa_ctx->indirect_ctx.size); 890 } 891} 892 893static void init_ppgtt_regs(u32 *regs, const struct i915_ppgtt *ppgtt) 894{ 895 if (i915_vm_is_4lvl(&ppgtt->vm)) { 896 /* 64b PPGTT (48bit canonical) 897 * PDP0_DESCRIPTOR contains the base address to PML4 and 898 * other PDP Descriptors are ignored. 899 */ 900 ASSIGN_CTX_PML4(ppgtt, regs); 901 } else { 902 ASSIGN_CTX_PDP(ppgtt, regs, 3); 903 ASSIGN_CTX_PDP(ppgtt, regs, 2); 904 ASSIGN_CTX_PDP(ppgtt, regs, 1); 905 ASSIGN_CTX_PDP(ppgtt, regs, 0); 906 } 907} 908 909static struct i915_ppgtt *vm_alias(struct i915_address_space *vm) 910{ 911 if (i915_is_ggtt(vm)) 912 return i915_vm_to_ggtt(vm)->alias; 913 else 914 return i915_vm_to_ppgtt(vm); 915} 916 917static void __reset_stop_ring(u32 *regs, const struct intel_engine_cs *engine) 918{ 919 int x; 920 921 x = lrc_ring_mi_mode(engine); 922 if (x != -1) { 923 regs[x + 1] &= ~STOP_RING; 924 regs[x + 1] |= STOP_RING << 16; 925 } 926} 927 928static void __lrc_init_regs(u32 *regs, 929 const struct intel_context *ce, 930 const struct intel_engine_cs *engine, 931 bool inhibit) 932{ 933 /* 934 * A context is actually a big batch buffer with several 935 * MI_LOAD_REGISTER_IMM commands followed by (reg, value) pairs. The 936 * values we are setting here are only for the first context restore: 937 * on a subsequent save, the GPU will recreate this batchbuffer with new 938 * values (including all the missing MI_LOAD_REGISTER_IMM commands that 939 * we are not initializing here). 940 * 941 * Must keep consistent with virtual_update_register_offsets(). 942 */ 943 944 if (inhibit) 945 memset(regs, 0, PAGE_SIZE); 946 947 set_offsets(regs, reg_offsets(engine), engine, inhibit); 948 949 init_common_regs(regs, ce, engine, inhibit); 950 init_ppgtt_regs(regs, vm_alias(ce->vm)); 951 952 init_wa_bb_regs(regs, engine); 953 954 __reset_stop_ring(regs, engine); 955} 956 957void lrc_init_regs(const struct intel_context *ce, 958 const struct intel_engine_cs *engine, 959 bool inhibit) 960{ 961 __lrc_init_regs(ce->lrc_reg_state, ce, engine, inhibit); 962} 963 964void lrc_reset_regs(const struct intel_context *ce, 965 const struct intel_engine_cs *engine) 966{ 967 __reset_stop_ring(ce->lrc_reg_state, engine); 968} 969 970static void 971set_redzone(void *vaddr, const struct intel_engine_cs *engine) 972{ 973 if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 974 return; 975 976 vaddr += engine->context_size; 977 978 memset(vaddr, CONTEXT_REDZONE, I915_GTT_PAGE_SIZE); 979} 980 981static void 982check_redzone(const void *vaddr, const struct intel_engine_cs *engine) 983{ 984 if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 985 return; 986 987 vaddr += engine->context_size; 988 989 if (memchr_inv(vaddr, CONTEXT_REDZONE, I915_GTT_PAGE_SIZE)) 990 drm_err_once(&engine->i915->drm, 991 "%s context redzone overwritten!\n", 992 engine->name); 993} 994 995static u32 context_wa_bb_offset(const struct intel_context *ce) 996{ 997 return PAGE_SIZE * ce->wa_bb_page; 998} 999 1000static u32 *context_indirect_bb(const struct intel_context *ce) 1001{ 1002 void *ptr; 1003 1004 GEM_BUG_ON(!ce->wa_bb_page); 1005 1006 ptr = ce->lrc_reg_state; 1007 ptr -= LRC_STATE_OFFSET; /* back to start of context image */ 1008 ptr += context_wa_bb_offset(ce); 1009 1010 return ptr; 1011} 1012 1013void lrc_init_state(struct intel_context *ce, 1014 struct intel_engine_cs *engine, 1015 void *state) 1016{ 1017 bool inhibit = true; 1018 1019 set_redzone(state, engine); 1020 1021 if (engine->default_state) { 1022#ifdef __linux__ 1023 shmem_read(engine->default_state, 0, 1024 state, engine->context_size); 1025#else 1026 uao_read(engine->default_state, 0, 1027 state, engine->context_size); 1028#endif 1029 __set_bit(CONTEXT_VALID_BIT, &ce->flags); 1030 inhibit = false; 1031 } 1032 1033 /* Clear the ppHWSP (inc. per-context counters) */ 1034 memset(state, 0, PAGE_SIZE); 1035 1036 /* Clear the indirect wa and storage */ 1037 if (ce->wa_bb_page) 1038 memset(state + context_wa_bb_offset(ce), 0, PAGE_SIZE); 1039 1040 /* 1041 * The second page of the context object contains some registers which 1042 * must be set up prior to the first execution. 1043 */ 1044 __lrc_init_regs(state + LRC_STATE_OFFSET, ce, engine, inhibit); 1045} 1046 1047u32 lrc_indirect_bb(const struct intel_context *ce) 1048{ 1049 return i915_ggtt_offset(ce->state) + context_wa_bb_offset(ce); 1050} 1051 1052static u32 *setup_predicate_disable_wa(const struct intel_context *ce, u32 *cs) 1053{ 1054 /* If predication is active, this will be noop'ed */ 1055 *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT | (4 - 2); 1056 *cs++ = lrc_indirect_bb(ce) + DG2_PREDICATE_RESULT_WA; 1057 *cs++ = 0; 1058 *cs++ = 0; /* No predication */ 1059 1060 /* predicated end, only terminates if SET_PREDICATE_RESULT:0 is clear */ 1061 *cs++ = MI_BATCH_BUFFER_END | BIT(15); 1062 *cs++ = MI_SET_PREDICATE | MI_SET_PREDICATE_DISABLE; 1063 1064 /* Instructions are no longer predicated (disabled), we can proceed */ 1065 *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT | (4 - 2); 1066 *cs++ = lrc_indirect_bb(ce) + DG2_PREDICATE_RESULT_WA; 1067 *cs++ = 0; 1068 *cs++ = 1; /* enable predication before the next BB */ 1069 1070 *cs++ = MI_BATCH_BUFFER_END; 1071 GEM_BUG_ON(offset_in_page(cs) > DG2_PREDICATE_RESULT_WA); 1072 1073 return cs; 1074} 1075 1076static struct i915_vma * 1077__lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine) 1078{ 1079 struct drm_i915_gem_object *obj; 1080 struct i915_vma *vma; 1081 u32 context_size; 1082 1083 context_size = round_up(engine->context_size, I915_GTT_PAGE_SIZE); 1084 1085 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 1086 context_size += I915_GTT_PAGE_SIZE; /* for redzone */ 1087 1088 if (GRAPHICS_VER(engine->i915) >= 12) { 1089 ce->wa_bb_page = context_size / PAGE_SIZE; 1090 context_size += PAGE_SIZE; 1091 } 1092 1093 if (intel_context_is_parent(ce) && intel_engine_uses_guc(engine)) { 1094 ce->parallel.guc.parent_page = context_size / PAGE_SIZE; 1095 context_size += PARENT_SCRATCH_SIZE; 1096 } 1097 1098 obj = i915_gem_object_create_lmem(engine->i915, context_size, 1099 I915_BO_ALLOC_PM_VOLATILE); 1100 if (IS_ERR(obj)) { 1101 obj = i915_gem_object_create_shmem(engine->i915, context_size); 1102 if (IS_ERR(obj)) 1103 return ERR_CAST(obj); 1104 1105 /* 1106 * Wa_22016122933: For Media version 13.0, all Media GT shared 1107 * memory needs to be mapped as WC on CPU side and UC (PAT 1108 * index 2) on GPU side. 1109 */ 1110 if (intel_gt_needs_wa_22016122933(engine->gt)) 1111 i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE); 1112 } 1113 1114 vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); 1115 if (IS_ERR(vma)) { 1116 i915_gem_object_put(obj); 1117 return vma; 1118 } 1119 1120 return vma; 1121} 1122 1123static struct intel_timeline * 1124pinned_timeline(struct intel_context *ce, struct intel_engine_cs *engine) 1125{ 1126 struct intel_timeline *tl = fetch_and_zero(&ce->timeline); 1127 1128 return intel_timeline_create_from_engine(engine, page_unmask_bits(tl)); 1129} 1130 1131int lrc_alloc(struct intel_context *ce, struct intel_engine_cs *engine) 1132{ 1133 struct intel_ring *ring; 1134 struct i915_vma *vma; 1135 int err; 1136 1137 GEM_BUG_ON(ce->state); 1138 1139 vma = __lrc_alloc_state(ce, engine); 1140 if (IS_ERR(vma)) 1141 return PTR_ERR(vma); 1142 1143 ring = intel_engine_create_ring(engine, ce->ring_size); 1144 if (IS_ERR(ring)) { 1145 err = PTR_ERR(ring); 1146 goto err_vma; 1147 } 1148 1149 if (!page_mask_bits(ce->timeline)) { 1150 struct intel_timeline *tl; 1151 1152 /* 1153 * Use the static global HWSP for the kernel context, and 1154 * a dynamically allocated cacheline for everyone else. 1155 */ 1156 if (unlikely(ce->timeline)) 1157 tl = pinned_timeline(ce, engine); 1158 else 1159 tl = intel_timeline_create(engine->gt); 1160 if (IS_ERR(tl)) { 1161 err = PTR_ERR(tl); 1162 goto err_ring; 1163 } 1164 1165 ce->timeline = tl; 1166 } 1167 1168 ce->ring = ring; 1169 ce->state = vma; 1170 1171 return 0; 1172 1173err_ring: 1174 intel_ring_put(ring); 1175err_vma: 1176 i915_vma_put(vma); 1177 return err; 1178} 1179 1180void lrc_reset(struct intel_context *ce) 1181{ 1182 GEM_BUG_ON(!intel_context_is_pinned(ce)); 1183 1184 intel_ring_reset(ce->ring, ce->ring->emit); 1185 1186 /* Scrub away the garbage */ 1187 lrc_init_regs(ce, ce->engine, true); 1188 ce->lrc.lrca = lrc_update_regs(ce, ce->engine, ce->ring->tail); 1189} 1190 1191int 1192lrc_pre_pin(struct intel_context *ce, 1193 struct intel_engine_cs *engine, 1194 struct i915_gem_ww_ctx *ww, 1195 void **vaddr) 1196{ 1197 GEM_BUG_ON(!ce->state); 1198 GEM_BUG_ON(!i915_vma_is_pinned(ce->state)); 1199 1200 *vaddr = i915_gem_object_pin_map(ce->state->obj, 1201 intel_gt_coherent_map_type(ce->engine->gt, 1202 ce->state->obj, 1203 false) | 1204 I915_MAP_OVERRIDE); 1205 1206 return PTR_ERR_OR_ZERO(*vaddr); 1207} 1208 1209int 1210lrc_pin(struct intel_context *ce, 1211 struct intel_engine_cs *engine, 1212 void *vaddr) 1213{ 1214 ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET; 1215 1216 if (!__test_and_set_bit(CONTEXT_INIT_BIT, &ce->flags)) 1217 lrc_init_state(ce, engine, vaddr); 1218 1219 ce->lrc.lrca = lrc_update_regs(ce, engine, ce->ring->tail); 1220 return 0; 1221} 1222 1223void lrc_unpin(struct intel_context *ce) 1224{ 1225 if (unlikely(ce->parallel.last_rq)) { 1226 i915_request_put(ce->parallel.last_rq); 1227 ce->parallel.last_rq = NULL; 1228 } 1229 check_redzone((void *)ce->lrc_reg_state - LRC_STATE_OFFSET, 1230 ce->engine); 1231} 1232 1233void lrc_post_unpin(struct intel_context *ce) 1234{ 1235 i915_gem_object_unpin_map(ce->state->obj); 1236} 1237 1238void lrc_fini(struct intel_context *ce) 1239{ 1240 if (!ce->state) 1241 return; 1242 1243 intel_ring_put(fetch_and_zero(&ce->ring)); 1244 i915_vma_put(fetch_and_zero(&ce->state)); 1245} 1246 1247void lrc_destroy(struct kref *kref) 1248{ 1249 struct intel_context *ce = container_of(kref, typeof(*ce), ref); 1250 1251 GEM_BUG_ON(!i915_active_is_idle(&ce->active)); 1252 GEM_BUG_ON(intel_context_is_pinned(ce)); 1253 1254 lrc_fini(ce); 1255 1256 intel_context_fini(ce); 1257 intel_context_free(ce); 1258} 1259 1260static u32 * 1261gen12_emit_timestamp_wa(const struct intel_context *ce, u32 *cs) 1262{ 1263 *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | 1264 MI_SRM_LRM_GLOBAL_GTT | 1265 MI_LRI_LRM_CS_MMIO; 1266 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1267 *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + 1268 CTX_TIMESTAMP * sizeof(u32); 1269 *cs++ = 0; 1270 1271 *cs++ = MI_LOAD_REGISTER_REG | 1272 MI_LRR_SOURCE_CS_MMIO | 1273 MI_LRI_LRM_CS_MMIO; 1274 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1275 *cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(0)); 1276 1277 *cs++ = MI_LOAD_REGISTER_REG | 1278 MI_LRR_SOURCE_CS_MMIO | 1279 MI_LRI_LRM_CS_MMIO; 1280 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1281 *cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(0)); 1282 1283 return cs; 1284} 1285 1286static u32 * 1287gen12_emit_restore_scratch(const struct intel_context *ce, u32 *cs) 1288{ 1289 GEM_BUG_ON(lrc_ring_gpr0(ce->engine) == -1); 1290 1291 *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | 1292 MI_SRM_LRM_GLOBAL_GTT | 1293 MI_LRI_LRM_CS_MMIO; 1294 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1295 *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + 1296 (lrc_ring_gpr0(ce->engine) + 1) * sizeof(u32); 1297 *cs++ = 0; 1298 1299 return cs; 1300} 1301 1302static u32 * 1303gen12_emit_cmd_buf_wa(const struct intel_context *ce, u32 *cs) 1304{ 1305 GEM_BUG_ON(lrc_ring_cmd_buf_cctl(ce->engine) == -1); 1306 1307 *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | 1308 MI_SRM_LRM_GLOBAL_GTT | 1309 MI_LRI_LRM_CS_MMIO; 1310 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1311 *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + 1312 (lrc_ring_cmd_buf_cctl(ce->engine) + 1) * sizeof(u32); 1313 *cs++ = 0; 1314 1315 *cs++ = MI_LOAD_REGISTER_REG | 1316 MI_LRR_SOURCE_CS_MMIO | 1317 MI_LRI_LRM_CS_MMIO; 1318 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1319 *cs++ = i915_mmio_reg_offset(RING_CMD_BUF_CCTL(0)); 1320 1321 return cs; 1322} 1323 1324/* 1325 * The bspec's tuning guide asks us to program a vertical watermark value of 1326 * 0x3FF. However this register is not saved/restored properly by the 1327 * hardware, so we're required to apply the desired value via INDIRECT_CTX 1328 * batch buffer to ensure the value takes effect properly. All other bits 1329 * in this register should remain at 0 (the hardware default). 1330 */ 1331static u32 * 1332dg2_emit_draw_watermark_setting(u32 *cs) 1333{ 1334 *cs++ = MI_LOAD_REGISTER_IMM(1); 1335 *cs++ = i915_mmio_reg_offset(DRAW_WATERMARK); 1336 *cs++ = REG_FIELD_PREP(VERT_WM_VAL, 0x3FF); 1337 1338 return cs; 1339} 1340 1341static u32 * 1342gen12_emit_indirect_ctx_rcs(const struct intel_context *ce, u32 *cs) 1343{ 1344 cs = gen12_emit_timestamp_wa(ce, cs); 1345 cs = gen12_emit_cmd_buf_wa(ce, cs); 1346 cs = gen12_emit_restore_scratch(ce, cs); 1347 1348 /* Wa_16013000631:dg2 */ 1349 if (IS_DG2_G11(ce->engine->i915)) 1350 cs = gen8_emit_pipe_control(cs, PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE, 0); 1351 1352 cs = gen12_emit_aux_table_inv(ce->engine, cs); 1353 1354 /* Wa_16014892111 */ 1355 if (IS_GFX_GT_IP_STEP(ce->engine->gt, IP_VER(12, 70), STEP_A0, STEP_B0) || 1356 IS_GFX_GT_IP_STEP(ce->engine->gt, IP_VER(12, 71), STEP_A0, STEP_B0) || 1357 IS_DG2(ce->engine->i915)) 1358 cs = dg2_emit_draw_watermark_setting(cs); 1359 1360 return cs; 1361} 1362 1363static u32 * 1364gen12_emit_indirect_ctx_xcs(const struct intel_context *ce, u32 *cs) 1365{ 1366 cs = gen12_emit_timestamp_wa(ce, cs); 1367 cs = gen12_emit_restore_scratch(ce, cs); 1368 1369 /* Wa_16013000631:dg2 */ 1370 if (IS_DG2_G11(ce->engine->i915)) 1371 if (ce->engine->class == COMPUTE_CLASS) 1372 cs = gen8_emit_pipe_control(cs, 1373 PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE, 1374 0); 1375 1376 return gen12_emit_aux_table_inv(ce->engine, cs); 1377} 1378 1379static void 1380setup_indirect_ctx_bb(const struct intel_context *ce, 1381 const struct intel_engine_cs *engine, 1382 u32 *(*emit)(const struct intel_context *, u32 *)) 1383{ 1384 u32 * const start = context_indirect_bb(ce); 1385 u32 *cs; 1386 1387 cs = emit(ce, start); 1388 GEM_BUG_ON(cs - start > I915_GTT_PAGE_SIZE / sizeof(*cs)); 1389 while ((unsigned long)cs % CACHELINE_BYTES) 1390 *cs++ = MI_NOOP; 1391 1392 GEM_BUG_ON(cs - start > DG2_PREDICATE_RESULT_BB / sizeof(*start)); 1393 setup_predicate_disable_wa(ce, start + DG2_PREDICATE_RESULT_BB / sizeof(*start)); 1394 1395 lrc_setup_indirect_ctx(ce->lrc_reg_state, engine, 1396 lrc_indirect_bb(ce), 1397 (cs - start) * sizeof(*cs)); 1398} 1399 1400/* 1401 * The context descriptor encodes various attributes of a context, 1402 * including its GTT address and some flags. Because it's fairly 1403 * expensive to calculate, we'll just do it once and cache the result, 1404 * which remains valid until the context is unpinned. 1405 * 1406 * This is what a descriptor looks like, from LSB to MSB:: 1407 * 1408 * bits 0-11: flags, GEN8_CTX_* (cached in ctx->desc_template) 1409 * bits 12-31: LRCA, GTT address of (the HWSP of) this context 1410 * bits 32-52: ctx ID, a globally unique tag (highest bit used by GuC) 1411 * bits 53-54: mbz, reserved for use by hardware 1412 * bits 55-63: group ID, currently unused and set to 0 1413 * 1414 * Starting from Gen11, the upper dword of the descriptor has a new format: 1415 * 1416 * bits 32-36: reserved 1417 * bits 37-47: SW context ID 1418 * bits 48:53: engine instance 1419 * bit 54: mbz, reserved for use by hardware 1420 * bits 55-60: SW counter 1421 * bits 61-63: engine class 1422 * 1423 * On Xe_HP, the upper dword of the descriptor has a new format: 1424 * 1425 * bits 32-37: virtual function number 1426 * bit 38: mbz, reserved for use by hardware 1427 * bits 39-54: SW context ID 1428 * bits 55-57: reserved 1429 * bits 58-63: SW counter 1430 * 1431 * engine info, SW context ID and SW counter need to form a unique number 1432 * (Context ID) per lrc. 1433 */ 1434static u32 lrc_descriptor(const struct intel_context *ce) 1435{ 1436 u32 desc; 1437 1438 desc = INTEL_LEGACY_32B_CONTEXT; 1439 if (i915_vm_is_4lvl(ce->vm)) 1440 desc = INTEL_LEGACY_64B_CONTEXT; 1441 desc <<= GEN8_CTX_ADDRESSING_MODE_SHIFT; 1442 1443 desc |= GEN8_CTX_VALID | GEN8_CTX_PRIVILEGE; 1444 if (GRAPHICS_VER(ce->vm->i915) == 8) 1445 desc |= GEN8_CTX_L3LLC_COHERENT; 1446 1447 return i915_ggtt_offset(ce->state) | desc; 1448} 1449 1450u32 lrc_update_regs(const struct intel_context *ce, 1451 const struct intel_engine_cs *engine, 1452 u32 head) 1453{ 1454 struct intel_ring *ring = ce->ring; 1455 u32 *regs = ce->lrc_reg_state; 1456 1457 GEM_BUG_ON(!intel_ring_offset_valid(ring, head)); 1458 GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->tail)); 1459 1460 regs[CTX_RING_START] = i915_ggtt_offset(ring->vma); 1461 regs[CTX_RING_HEAD] = head; 1462 regs[CTX_RING_TAIL] = ring->tail; 1463 regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID; 1464 1465 /* RPCS */ 1466 if (engine->class == RENDER_CLASS) { 1467 regs[CTX_R_PWR_CLK_STATE] = 1468 intel_sseu_make_rpcs(engine->gt, &ce->sseu); 1469 1470 i915_oa_init_reg_state(ce, engine); 1471 } 1472 1473 if (ce->wa_bb_page) { 1474 u32 *(*fn)(const struct intel_context *ce, u32 *cs); 1475 1476 fn = gen12_emit_indirect_ctx_xcs; 1477 if (ce->engine->class == RENDER_CLASS) 1478 fn = gen12_emit_indirect_ctx_rcs; 1479 1480 /* Mutually exclusive wrt to global indirect bb */ 1481 GEM_BUG_ON(engine->wa_ctx.indirect_ctx.size); 1482 setup_indirect_ctx_bb(ce, engine, fn); 1483 } 1484 1485 return lrc_descriptor(ce) | CTX_DESC_FORCE_RESTORE; 1486} 1487 1488void lrc_update_offsets(struct intel_context *ce, 1489 struct intel_engine_cs *engine) 1490{ 1491 set_offsets(ce->lrc_reg_state, reg_offsets(engine), engine, false); 1492} 1493 1494void lrc_check_regs(const struct intel_context *ce, 1495 const struct intel_engine_cs *engine, 1496 const char *when) 1497{ 1498 const struct intel_ring *ring = ce->ring; 1499 u32 *regs = ce->lrc_reg_state; 1500 bool valid = true; 1501 int x; 1502 1503 if (regs[CTX_RING_START] != i915_ggtt_offset(ring->vma)) { 1504 pr_err("%s: context submitted with incorrect RING_START [%08x], expected %08x\n", 1505 engine->name, 1506 regs[CTX_RING_START], 1507 i915_ggtt_offset(ring->vma)); 1508 regs[CTX_RING_START] = i915_ggtt_offset(ring->vma); 1509 valid = false; 1510 } 1511 1512 if ((regs[CTX_RING_CTL] & ~(RING_WAIT | RING_WAIT_SEMAPHORE)) != 1513 (RING_CTL_SIZE(ring->size) | RING_VALID)) { 1514 pr_err("%s: context submitted with incorrect RING_CTL [%08x], expected %08x\n", 1515 engine->name, 1516 regs[CTX_RING_CTL], 1517 (u32)(RING_CTL_SIZE(ring->size) | RING_VALID)); 1518 regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID; 1519 valid = false; 1520 } 1521 1522 x = lrc_ring_mi_mode(engine); 1523 if (x != -1 && regs[x + 1] & (regs[x + 1] >> 16) & STOP_RING) { 1524 pr_err("%s: context submitted with STOP_RING [%08x] in RING_MI_MODE\n", 1525 engine->name, regs[x + 1]); 1526 regs[x + 1] &= ~STOP_RING; 1527 regs[x + 1] |= STOP_RING << 16; 1528 valid = false; 1529 } 1530 1531 WARN_ONCE(!valid, "Invalid lrc state found %s submission\n", when); 1532} 1533 1534/* 1535 * In this WA we need to set GEN8_L3SQCREG4[21:21] and reset it after 1536 * PIPE_CONTROL instruction. This is required for the flush to happen correctly 1537 * but there is a slight complication as this is applied in WA batch where the 1538 * values are only initialized once so we cannot take register value at the 1539 * beginning and reuse it further; hence we save its value to memory, upload a 1540 * constant value with bit21 set and then we restore it back with the saved value. 1541 * To simplify the WA, a constant value is formed by using the default value 1542 * of this register. This shouldn't be a problem because we are only modifying 1543 * it for a short period and this batch in non-premptible. We can ofcourse 1544 * use additional instructions that read the actual value of the register 1545 * at that time and set our bit of interest but it makes the WA complicated. 1546 * 1547 * This WA is also required for Gen9 so extracting as a function avoids 1548 * code duplication. 1549 */ 1550static u32 * 1551gen8_emit_flush_coherentl3_wa(struct intel_engine_cs *engine, u32 *batch) 1552{ 1553 /* NB no one else is allowed to scribble over scratch + 256! */ 1554 *batch++ = MI_STORE_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT; 1555 *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4); 1556 *batch++ = intel_gt_scratch_offset(engine->gt, 1557 INTEL_GT_SCRATCH_FIELD_COHERENTL3_WA); 1558 *batch++ = 0; 1559 1560 *batch++ = MI_LOAD_REGISTER_IMM(1); 1561 *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4); 1562 *batch++ = 0x40400000 | GEN8_LQSC_FLUSH_COHERENT_LINES; 1563 1564 batch = gen8_emit_pipe_control(batch, 1565 PIPE_CONTROL_CS_STALL | 1566 PIPE_CONTROL_DC_FLUSH_ENABLE, 1567 0); 1568 1569 *batch++ = MI_LOAD_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT; 1570 *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4); 1571 *batch++ = intel_gt_scratch_offset(engine->gt, 1572 INTEL_GT_SCRATCH_FIELD_COHERENTL3_WA); 1573 *batch++ = 0; 1574 1575 return batch; 1576} 1577 1578/* 1579 * Typically we only have one indirect_ctx and per_ctx batch buffer which are 1580 * initialized at the beginning and shared across all contexts but this field 1581 * helps us to have multiple batches at different offsets and select them based 1582 * on a criteria. At the moment this batch always start at the beginning of the page 1583 * and at this point we don't have multiple wa_ctx batch buffers. 1584 * 1585 * The number of WA applied are not known at the beginning; we use this field 1586 * to return the no of DWORDS written. 1587 * 1588 * It is to be noted that this batch does not contain MI_BATCH_BUFFER_END 1589 * so it adds NOOPs as padding to make it cacheline aligned. 1590 * MI_BATCH_BUFFER_END will be added to perctx batch and both of them together 1591 * makes a complete batch buffer. 1592 */ 1593static u32 *gen8_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch) 1594{ 1595 /* WaDisableCtxRestoreArbitration:bdw,chv */ 1596 *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; 1597 1598 /* WaFlushCoherentL3CacheLinesAtContextSwitch:bdw */ 1599 if (IS_BROADWELL(engine->i915)) 1600 batch = gen8_emit_flush_coherentl3_wa(engine, batch); 1601 1602 /* WaClearSlmSpaceAtContextSwitch:bdw,chv */ 1603 /* Actual scratch location is at 128 bytes offset */ 1604 batch = gen8_emit_pipe_control(batch, 1605 PIPE_CONTROL_FLUSH_L3 | 1606 PIPE_CONTROL_STORE_DATA_INDEX | 1607 PIPE_CONTROL_CS_STALL | 1608 PIPE_CONTROL_QW_WRITE, 1609 LRC_PPHWSP_SCRATCH_ADDR); 1610 1611 *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; 1612 1613 /* Pad to end of cacheline */ 1614 while ((unsigned long)batch % CACHELINE_BYTES) 1615 *batch++ = MI_NOOP; 1616 1617 /* 1618 * MI_BATCH_BUFFER_END is not required in Indirect ctx BB because 1619 * execution depends on the length specified in terms of cache lines 1620 * in the register CTX_RCS_INDIRECT_CTX 1621 */ 1622 1623 return batch; 1624} 1625 1626struct lri { 1627 i915_reg_t reg; 1628 u32 value; 1629}; 1630 1631static u32 *emit_lri(u32 *batch, const struct lri *lri, unsigned int count) 1632{ 1633 GEM_BUG_ON(!count || count > 63); 1634 1635 *batch++ = MI_LOAD_REGISTER_IMM(count); 1636 do { 1637 *batch++ = i915_mmio_reg_offset(lri->reg); 1638 *batch++ = lri->value; 1639 } while (lri++, --count); 1640 *batch++ = MI_NOOP; 1641 1642 return batch; 1643} 1644 1645static u32 *gen9_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch) 1646{ 1647 static const struct lri lri[] = { 1648 /* WaDisableGatherAtSetShaderCommonSlice:skl,bxt,kbl,glk */ 1649 { 1650 COMMON_SLICE_CHICKEN2, 1651 __MASKED_FIELD(GEN9_DISABLE_GATHER_AT_SET_SHADER_COMMON_SLICE, 1652 0), 1653 }, 1654 1655 /* BSpec: 11391 */ 1656 { 1657 FF_SLICE_CHICKEN, 1658 __MASKED_FIELD(FF_SLICE_CHICKEN_CL_PROVOKING_VERTEX_FIX, 1659 FF_SLICE_CHICKEN_CL_PROVOKING_VERTEX_FIX), 1660 }, 1661 1662 /* BSpec: 11299 */ 1663 { 1664 _3D_CHICKEN3, 1665 __MASKED_FIELD(_3D_CHICKEN_SF_PROVOKING_VERTEX_FIX, 1666 _3D_CHICKEN_SF_PROVOKING_VERTEX_FIX), 1667 } 1668 }; 1669 1670 *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; 1671 1672 /* WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt,glk */ 1673 batch = gen8_emit_flush_coherentl3_wa(engine, batch); 1674 1675 /* WaClearSlmSpaceAtContextSwitch:skl,bxt,kbl,glk,cfl */ 1676 batch = gen8_emit_pipe_control(batch, 1677 PIPE_CONTROL_FLUSH_L3 | 1678 PIPE_CONTROL_STORE_DATA_INDEX | 1679 PIPE_CONTROL_CS_STALL | 1680 PIPE_CONTROL_QW_WRITE, 1681 LRC_PPHWSP_SCRATCH_ADDR); 1682 1683 batch = emit_lri(batch, lri, ARRAY_SIZE(lri)); 1684 1685 /* WaMediaPoolStateCmdInWABB:bxt,glk */ 1686 if (HAS_POOLED_EU(engine->i915)) { 1687 /* 1688 * EU pool configuration is setup along with golden context 1689 * during context initialization. This value depends on 1690 * device type (2x6 or 3x6) and needs to be updated based 1691 * on which subslice is disabled especially for 2x6 1692 * devices, however it is safe to load default 1693 * configuration of 3x6 device instead of masking off 1694 * corresponding bits because HW ignores bits of a disabled 1695 * subslice and drops down to appropriate config. Please 1696 * see render_state_setup() in i915_gem_render_state.c for 1697 * possible configurations, to avoid duplication they are 1698 * not shown here again. 1699 */ 1700 *batch++ = GEN9_MEDIA_POOL_STATE; 1701 *batch++ = GEN9_MEDIA_POOL_ENABLE; 1702 *batch++ = 0x00777000; 1703 *batch++ = 0; 1704 *batch++ = 0; 1705 *batch++ = 0; 1706 } 1707 1708 *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; 1709 1710 /* Pad to end of cacheline */ 1711 while ((unsigned long)batch % CACHELINE_BYTES) 1712 *batch++ = MI_NOOP; 1713 1714 return batch; 1715} 1716 1717#define CTX_WA_BB_SIZE (PAGE_SIZE) 1718 1719static int lrc_create_wa_ctx(struct intel_engine_cs *engine) 1720{ 1721 struct drm_i915_gem_object *obj; 1722 struct i915_vma *vma; 1723 int err; 1724 1725 obj = i915_gem_object_create_shmem(engine->i915, CTX_WA_BB_SIZE); 1726 if (IS_ERR(obj)) 1727 return PTR_ERR(obj); 1728 1729 vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); 1730 if (IS_ERR(vma)) { 1731 err = PTR_ERR(vma); 1732 goto err; 1733 } 1734 1735 engine->wa_ctx.vma = vma; 1736 return 0; 1737 1738err: 1739 i915_gem_object_put(obj); 1740 return err; 1741} 1742 1743void lrc_fini_wa_ctx(struct intel_engine_cs *engine) 1744{ 1745 i915_vma_unpin_and_release(&engine->wa_ctx.vma, 0); 1746} 1747 1748typedef u32 *(*wa_bb_func_t)(struct intel_engine_cs *engine, u32 *batch); 1749 1750void lrc_init_wa_ctx(struct intel_engine_cs *engine) 1751{ 1752 struct i915_ctx_workarounds *wa_ctx = &engine->wa_ctx; 1753 struct i915_wa_ctx_bb *wa_bb[] = { 1754 &wa_ctx->indirect_ctx, &wa_ctx->per_ctx 1755 }; 1756 wa_bb_func_t wa_bb_fn[ARRAY_SIZE(wa_bb)]; 1757 struct i915_gem_ww_ctx ww; 1758 void *batch, *batch_ptr; 1759 unsigned int i; 1760 int err; 1761 1762 if (GRAPHICS_VER(engine->i915) >= 11 || 1763 !(engine->flags & I915_ENGINE_HAS_RCS_REG_STATE)) 1764 return; 1765 1766 if (GRAPHICS_VER(engine->i915) == 9) { 1767 wa_bb_fn[0] = gen9_init_indirectctx_bb; 1768 wa_bb_fn[1] = NULL; 1769 } else if (GRAPHICS_VER(engine->i915) == 8) { 1770 wa_bb_fn[0] = gen8_init_indirectctx_bb; 1771 wa_bb_fn[1] = NULL; 1772 } 1773 1774 err = lrc_create_wa_ctx(engine); 1775 if (err) { 1776 /* 1777 * We continue even if we fail to initialize WA batch 1778 * because we only expect rare glitches but nothing 1779 * critical to prevent us from using GPU 1780 */ 1781 drm_err(&engine->i915->drm, 1782 "Ignoring context switch w/a allocation error:%d\n", 1783 err); 1784 return; 1785 } 1786 1787 if (!engine->wa_ctx.vma) 1788 return; 1789 1790 i915_gem_ww_ctx_init(&ww, true); 1791retry: 1792 err = i915_gem_object_lock(wa_ctx->vma->obj, &ww); 1793 if (!err) 1794 err = i915_ggtt_pin(wa_ctx->vma, &ww, 0, PIN_HIGH); 1795 if (err) 1796 goto err; 1797 1798 batch = i915_gem_object_pin_map(wa_ctx->vma->obj, I915_MAP_WB); 1799 if (IS_ERR(batch)) { 1800 err = PTR_ERR(batch); 1801 goto err_unpin; 1802 } 1803 1804 /* 1805 * Emit the two workaround batch buffers, recording the offset from the 1806 * start of the workaround batch buffer object for each and their 1807 * respective sizes. 1808 */ 1809 batch_ptr = batch; 1810 for (i = 0; i < ARRAY_SIZE(wa_bb_fn); i++) { 1811 wa_bb[i]->offset = batch_ptr - batch; 1812 if (GEM_DEBUG_WARN_ON(!IS_ALIGNED(wa_bb[i]->offset, 1813 CACHELINE_BYTES))) { 1814 err = -EINVAL; 1815 break; 1816 } 1817 if (wa_bb_fn[i]) 1818 batch_ptr = wa_bb_fn[i](engine, batch_ptr); 1819 wa_bb[i]->size = batch_ptr - (batch + wa_bb[i]->offset); 1820 } 1821 GEM_BUG_ON(batch_ptr - batch > CTX_WA_BB_SIZE); 1822 1823 __i915_gem_object_flush_map(wa_ctx->vma->obj, 0, batch_ptr - batch); 1824 __i915_gem_object_release_map(wa_ctx->vma->obj); 1825 1826 /* Verify that we can handle failure to setup the wa_ctx */ 1827 if (!err) 1828 err = i915_inject_probe_error(engine->i915, -ENODEV); 1829 1830err_unpin: 1831 if (err) 1832 i915_vma_unpin(wa_ctx->vma); 1833err: 1834 if (err == -EDEADLK) { 1835 err = i915_gem_ww_ctx_backoff(&ww); 1836 if (!err) 1837 goto retry; 1838 } 1839 i915_gem_ww_ctx_fini(&ww); 1840 1841 if (err) { 1842 i915_vma_put(engine->wa_ctx.vma); 1843 1844 /* Clear all flags to prevent further use */ 1845 memset(wa_ctx, 0, sizeof(*wa_ctx)); 1846 } 1847} 1848 1849static void st_runtime_underflow(struct intel_context_stats *stats, s32 dt) 1850{ 1851#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 1852 stats->runtime.num_underflow++; 1853 stats->runtime.max_underflow = 1854 max_t(u32, stats->runtime.max_underflow, -dt); 1855#endif 1856} 1857 1858static u32 lrc_get_runtime(const struct intel_context *ce) 1859{ 1860 /* 1861 * We can use either ppHWSP[16] which is recorded before the context 1862 * switch (and so excludes the cost of context switches) or use the 1863 * value from the context image itself, which is saved/restored earlier 1864 * and so includes the cost of the save. 1865 */ 1866 return READ_ONCE(ce->lrc_reg_state[CTX_TIMESTAMP]); 1867} 1868 1869void lrc_update_runtime(struct intel_context *ce) 1870{ 1871 struct intel_context_stats *stats = &ce->stats; 1872 u32 old; 1873 s32 dt; 1874 1875 old = stats->runtime.last; 1876 stats->runtime.last = lrc_get_runtime(ce); 1877 dt = stats->runtime.last - old; 1878 if (!dt) 1879 return; 1880 1881 if (unlikely(dt < 0)) { 1882 CE_TRACE(ce, "runtime underflow: last=%u, new=%u, delta=%d\n", 1883 old, stats->runtime.last, dt); 1884 st_runtime_underflow(stats, dt); 1885 return; 1886 } 1887 1888 ewma_runtime_add(&stats->runtime.avg, dt); 1889 stats->runtime.total += dt; 1890} 1891 1892#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 1893#include "selftest_lrc.c" 1894#endif 1895