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 static void set_offsets(u32 *regs, 24 const u8 *data, 25 const struct intel_engine_cs *engine, 26 bool close) 27 #define NOP(x) (BIT(7) | (x)) 28 #define LRI(count, flags) ((flags) << 6 | (count) | BUILD_BUG_ON_ZERO(count >= BIT(6))) 29 #define POSTED BIT(0) 30 #define REG(x) (((x) >> 2) | BUILD_BUG_ON_ZERO(x >= 0x200)) 31 #define REG16(x) \ 32 (((x) >> 9) | BIT(7) | BUILD_BUG_ON_ZERO(x >= 0x10000)), \ 33 (((x) >> 2) & 0x7f) 34 #define END 0 35 { 36 const u32 base = engine->mmio_base; 37 38 while (*data) { 39 u8 count, flags; 40 41 if (*data & BIT(7)) { /* skip */ 42 count = *data++ & ~BIT(7); 43 regs += count; 44 continue; 45 } 46 47 count = *data & 0x3f; 48 flags = *data >> 6; 49 data++; 50 51 *regs = MI_LOAD_REGISTER_IMM(count); 52 if (flags & POSTED) 53 *regs |= MI_LRI_FORCE_POSTED; 54 if (GRAPHICS_VER(engine->i915) >= 11) 55 *regs |= MI_LRI_LRM_CS_MMIO; 56 regs++; 57 58 GEM_BUG_ON(!count); 59 do { 60 u32 offset = 0; 61 u8 v; 62 63 do { 64 v = *data++; 65 offset <<= 7; 66 offset |= v & ~BIT(7); 67 } while (v & BIT(7)); 68 69 regs[0] = base + (offset << 2); 70 regs += 2; 71 } while (--count); 72 } 73 74 if (close) { 75 /* Close the batch; used mainly by live_lrc_layout() */ 76 *regs = MI_BATCH_BUFFER_END; 77 if (GRAPHICS_VER(engine->i915) >= 11) 78 *regs |= BIT(0); 79 } 80 } 81 82 static const u8 gen8_xcs_offsets[] = { 83 NOP(1), 84 LRI(11, 0), 85 REG16(0x244), 86 REG(0x034), 87 REG(0x030), 88 REG(0x038), 89 REG(0x03c), 90 REG(0x168), 91 REG(0x140), 92 REG(0x110), 93 REG(0x11c), 94 REG(0x114), 95 REG(0x118), 96 97 NOP(9), 98 LRI(9, 0), 99 REG16(0x3a8), 100 REG16(0x28c), 101 REG16(0x288), 102 REG16(0x284), 103 REG16(0x280), 104 REG16(0x27c), 105 REG16(0x278), 106 REG16(0x274), 107 REG16(0x270), 108 109 NOP(13), 110 LRI(2, 0), 111 REG16(0x200), 112 REG(0x028), 113 114 END 115 }; 116 117 static const u8 gen9_xcs_offsets[] = { 118 NOP(1), 119 LRI(14, POSTED), 120 REG16(0x244), 121 REG(0x034), 122 REG(0x030), 123 REG(0x038), 124 REG(0x03c), 125 REG(0x168), 126 REG(0x140), 127 REG(0x110), 128 REG(0x11c), 129 REG(0x114), 130 REG(0x118), 131 REG(0x1c0), 132 REG(0x1c4), 133 REG(0x1c8), 134 135 NOP(3), 136 LRI(9, POSTED), 137 REG16(0x3a8), 138 REG16(0x28c), 139 REG16(0x288), 140 REG16(0x284), 141 REG16(0x280), 142 REG16(0x27c), 143 REG16(0x278), 144 REG16(0x274), 145 REG16(0x270), 146 147 NOP(13), 148 LRI(1, POSTED), 149 REG16(0x200), 150 151 NOP(13), 152 LRI(44, POSTED), 153 REG(0x028), 154 REG(0x09c), 155 REG(0x0c0), 156 REG(0x178), 157 REG(0x17c), 158 REG16(0x358), 159 REG(0x170), 160 REG(0x150), 161 REG(0x154), 162 REG(0x158), 163 REG16(0x41c), 164 REG16(0x600), 165 REG16(0x604), 166 REG16(0x608), 167 REG16(0x60c), 168 REG16(0x610), 169 REG16(0x614), 170 REG16(0x618), 171 REG16(0x61c), 172 REG16(0x620), 173 REG16(0x624), 174 REG16(0x628), 175 REG16(0x62c), 176 REG16(0x630), 177 REG16(0x634), 178 REG16(0x638), 179 REG16(0x63c), 180 REG16(0x640), 181 REG16(0x644), 182 REG16(0x648), 183 REG16(0x64c), 184 REG16(0x650), 185 REG16(0x654), 186 REG16(0x658), 187 REG16(0x65c), 188 REG16(0x660), 189 REG16(0x664), 190 REG16(0x668), 191 REG16(0x66c), 192 REG16(0x670), 193 REG16(0x674), 194 REG16(0x678), 195 REG16(0x67c), 196 REG(0x068), 197 198 END 199 }; 200 201 static const u8 gen12_xcs_offsets[] = { 202 NOP(1), 203 LRI(13, POSTED), 204 REG16(0x244), 205 REG(0x034), 206 REG(0x030), 207 REG(0x038), 208 REG(0x03c), 209 REG(0x168), 210 REG(0x140), 211 REG(0x110), 212 REG(0x1c0), 213 REG(0x1c4), 214 REG(0x1c8), 215 REG(0x180), 216 REG16(0x2b4), 217 218 NOP(5), 219 LRI(9, POSTED), 220 REG16(0x3a8), 221 REG16(0x28c), 222 REG16(0x288), 223 REG16(0x284), 224 REG16(0x280), 225 REG16(0x27c), 226 REG16(0x278), 227 REG16(0x274), 228 REG16(0x270), 229 230 END 231 }; 232 233 static const u8 dg2_xcs_offsets[] = { 234 NOP(1), 235 LRI(15, POSTED), 236 REG16(0x244), 237 REG(0x034), 238 REG(0x030), 239 REG(0x038), 240 REG(0x03c), 241 REG(0x168), 242 REG(0x140), 243 REG(0x110), 244 REG(0x1c0), 245 REG(0x1c4), 246 REG(0x1c8), 247 REG(0x180), 248 REG16(0x2b4), 249 REG(0x120), 250 REG(0x124), 251 252 NOP(1), 253 LRI(9, POSTED), 254 REG16(0x3a8), 255 REG16(0x28c), 256 REG16(0x288), 257 REG16(0x284), 258 REG16(0x280), 259 REG16(0x27c), 260 REG16(0x278), 261 REG16(0x274), 262 REG16(0x270), 263 264 END 265 }; 266 267 static const u8 gen8_rcs_offsets[] = { 268 NOP(1), 269 LRI(14, POSTED), 270 REG16(0x244), 271 REG(0x034), 272 REG(0x030), 273 REG(0x038), 274 REG(0x03c), 275 REG(0x168), 276 REG(0x140), 277 REG(0x110), 278 REG(0x11c), 279 REG(0x114), 280 REG(0x118), 281 REG(0x1c0), 282 REG(0x1c4), 283 REG(0x1c8), 284 285 NOP(3), 286 LRI(9, POSTED), 287 REG16(0x3a8), 288 REG16(0x28c), 289 REG16(0x288), 290 REG16(0x284), 291 REG16(0x280), 292 REG16(0x27c), 293 REG16(0x278), 294 REG16(0x274), 295 REG16(0x270), 296 297 NOP(13), 298 LRI(1, 0), 299 REG(0x0c8), 300 301 END 302 }; 303 304 static const u8 gen9_rcs_offsets[] = { 305 NOP(1), 306 LRI(14, POSTED), 307 REG16(0x244), 308 REG(0x34), 309 REG(0x30), 310 REG(0x38), 311 REG(0x3c), 312 REG(0x168), 313 REG(0x140), 314 REG(0x110), 315 REG(0x11c), 316 REG(0x114), 317 REG(0x118), 318 REG(0x1c0), 319 REG(0x1c4), 320 REG(0x1c8), 321 322 NOP(3), 323 LRI(9, POSTED), 324 REG16(0x3a8), 325 REG16(0x28c), 326 REG16(0x288), 327 REG16(0x284), 328 REG16(0x280), 329 REG16(0x27c), 330 REG16(0x278), 331 REG16(0x274), 332 REG16(0x270), 333 334 NOP(13), 335 LRI(1, 0), 336 REG(0xc8), 337 338 NOP(13), 339 LRI(44, POSTED), 340 REG(0x28), 341 REG(0x9c), 342 REG(0xc0), 343 REG(0x178), 344 REG(0x17c), 345 REG16(0x358), 346 REG(0x170), 347 REG(0x150), 348 REG(0x154), 349 REG(0x158), 350 REG16(0x41c), 351 REG16(0x600), 352 REG16(0x604), 353 REG16(0x608), 354 REG16(0x60c), 355 REG16(0x610), 356 REG16(0x614), 357 REG16(0x618), 358 REG16(0x61c), 359 REG16(0x620), 360 REG16(0x624), 361 REG16(0x628), 362 REG16(0x62c), 363 REG16(0x630), 364 REG16(0x634), 365 REG16(0x638), 366 REG16(0x63c), 367 REG16(0x640), 368 REG16(0x644), 369 REG16(0x648), 370 REG16(0x64c), 371 REG16(0x650), 372 REG16(0x654), 373 REG16(0x658), 374 REG16(0x65c), 375 REG16(0x660), 376 REG16(0x664), 377 REG16(0x668), 378 REG16(0x66c), 379 REG16(0x670), 380 REG16(0x674), 381 REG16(0x678), 382 REG16(0x67c), 383 REG(0x68), 384 385 END 386 }; 387 388 static const u8 gen11_rcs_offsets[] = { 389 NOP(1), 390 LRI(15, POSTED), 391 REG16(0x244), 392 REG(0x034), 393 REG(0x030), 394 REG(0x038), 395 REG(0x03c), 396 REG(0x168), 397 REG(0x140), 398 REG(0x110), 399 REG(0x11c), 400 REG(0x114), 401 REG(0x118), 402 REG(0x1c0), 403 REG(0x1c4), 404 REG(0x1c8), 405 REG(0x180), 406 407 NOP(1), 408 LRI(9, POSTED), 409 REG16(0x3a8), 410 REG16(0x28c), 411 REG16(0x288), 412 REG16(0x284), 413 REG16(0x280), 414 REG16(0x27c), 415 REG16(0x278), 416 REG16(0x274), 417 REG16(0x270), 418 419 LRI(1, POSTED), 420 REG(0x1b0), 421 422 NOP(10), 423 LRI(1, 0), 424 REG(0x0c8), 425 426 END 427 }; 428 429 static const u8 gen12_rcs_offsets[] = { 430 NOP(1), 431 LRI(13, POSTED), 432 REG16(0x244), 433 REG(0x034), 434 REG(0x030), 435 REG(0x038), 436 REG(0x03c), 437 REG(0x168), 438 REG(0x140), 439 REG(0x110), 440 REG(0x1c0), 441 REG(0x1c4), 442 REG(0x1c8), 443 REG(0x180), 444 REG16(0x2b4), 445 446 NOP(5), 447 LRI(9, POSTED), 448 REG16(0x3a8), 449 REG16(0x28c), 450 REG16(0x288), 451 REG16(0x284), 452 REG16(0x280), 453 REG16(0x27c), 454 REG16(0x278), 455 REG16(0x274), 456 REG16(0x270), 457 458 LRI(3, POSTED), 459 REG(0x1b0), 460 REG16(0x5a8), 461 REG16(0x5ac), 462 463 NOP(6), 464 LRI(1, 0), 465 REG(0x0c8), 466 NOP(3 + 9 + 1), 467 468 LRI(51, POSTED), 469 REG16(0x588), 470 REG16(0x588), 471 REG16(0x588), 472 REG16(0x588), 473 REG16(0x588), 474 REG16(0x588), 475 REG(0x028), 476 REG(0x09c), 477 REG(0x0c0), 478 REG(0x178), 479 REG(0x17c), 480 REG16(0x358), 481 REG(0x170), 482 REG(0x150), 483 REG(0x154), 484 REG(0x158), 485 REG16(0x41c), 486 REG16(0x600), 487 REG16(0x604), 488 REG16(0x608), 489 REG16(0x60c), 490 REG16(0x610), 491 REG16(0x614), 492 REG16(0x618), 493 REG16(0x61c), 494 REG16(0x620), 495 REG16(0x624), 496 REG16(0x628), 497 REG16(0x62c), 498 REG16(0x630), 499 REG16(0x634), 500 REG16(0x638), 501 REG16(0x63c), 502 REG16(0x640), 503 REG16(0x644), 504 REG16(0x648), 505 REG16(0x64c), 506 REG16(0x650), 507 REG16(0x654), 508 REG16(0x658), 509 REG16(0x65c), 510 REG16(0x660), 511 REG16(0x664), 512 REG16(0x668), 513 REG16(0x66c), 514 REG16(0x670), 515 REG16(0x674), 516 REG16(0x678), 517 REG16(0x67c), 518 REG(0x068), 519 REG(0x084), 520 NOP(1), 521 522 END 523 }; 524 525 static const u8 xehp_rcs_offsets[] = { 526 NOP(1), 527 LRI(13, POSTED), 528 REG16(0x244), 529 REG(0x034), 530 REG(0x030), 531 REG(0x038), 532 REG(0x03c), 533 REG(0x168), 534 REG(0x140), 535 REG(0x110), 536 REG(0x1c0), 537 REG(0x1c4), 538 REG(0x1c8), 539 REG(0x180), 540 REG16(0x2b4), 541 542 NOP(5), 543 LRI(9, POSTED), 544 REG16(0x3a8), 545 REG16(0x28c), 546 REG16(0x288), 547 REG16(0x284), 548 REG16(0x280), 549 REG16(0x27c), 550 REG16(0x278), 551 REG16(0x274), 552 REG16(0x270), 553 554 LRI(3, POSTED), 555 REG(0x1b0), 556 REG16(0x5a8), 557 REG16(0x5ac), 558 559 NOP(6), 560 LRI(1, 0), 561 REG(0x0c8), 562 563 END 564 }; 565 566 static const u8 dg2_rcs_offsets[] = { 567 NOP(1), 568 LRI(15, POSTED), 569 REG16(0x244), 570 REG(0x034), 571 REG(0x030), 572 REG(0x038), 573 REG(0x03c), 574 REG(0x168), 575 REG(0x140), 576 REG(0x110), 577 REG(0x1c0), 578 REG(0x1c4), 579 REG(0x1c8), 580 REG(0x180), 581 REG16(0x2b4), 582 REG(0x120), 583 REG(0x124), 584 585 NOP(1), 586 LRI(9, POSTED), 587 REG16(0x3a8), 588 REG16(0x28c), 589 REG16(0x288), 590 REG16(0x284), 591 REG16(0x280), 592 REG16(0x27c), 593 REG16(0x278), 594 REG16(0x274), 595 REG16(0x270), 596 597 LRI(3, POSTED), 598 REG(0x1b0), 599 REG16(0x5a8), 600 REG16(0x5ac), 601 602 NOP(6), 603 LRI(1, 0), 604 REG(0x0c8), 605 606 END 607 }; 608 609 #undef END 610 #undef REG16 611 #undef REG 612 #undef LRI 613 #undef NOP 614 615 static const u8 *reg_offsets(const struct intel_engine_cs *engine) 616 { 617 /* 618 * The gen12+ lists only have the registers we program in the basic 619 * default state. We rely on the context image using relative 620 * addressing to automatic fixup the register state between the 621 * physical engines for virtual engine. 622 */ 623 GEM_BUG_ON(GRAPHICS_VER(engine->i915) >= 12 && 624 !intel_engine_has_relative_mmio(engine)); 625 626 if (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE) { 627 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 55)) 628 return dg2_rcs_offsets; 629 else if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 630 return xehp_rcs_offsets; 631 else if (GRAPHICS_VER(engine->i915) >= 12) 632 return gen12_rcs_offsets; 633 else if (GRAPHICS_VER(engine->i915) >= 11) 634 return gen11_rcs_offsets; 635 else if (GRAPHICS_VER(engine->i915) >= 9) 636 return gen9_rcs_offsets; 637 else 638 return gen8_rcs_offsets; 639 } else { 640 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 55)) 641 return dg2_xcs_offsets; 642 else if (GRAPHICS_VER(engine->i915) >= 12) 643 return gen12_xcs_offsets; 644 else if (GRAPHICS_VER(engine->i915) >= 9) 645 return gen9_xcs_offsets; 646 else 647 return gen8_xcs_offsets; 648 } 649 } 650 651 static int lrc_ring_mi_mode(const struct intel_engine_cs *engine) 652 { 653 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 654 return 0x70; 655 else if (GRAPHICS_VER(engine->i915) >= 12) 656 return 0x60; 657 else if (GRAPHICS_VER(engine->i915) >= 9) 658 return 0x54; 659 else if (engine->class == RENDER_CLASS) 660 return 0x58; 661 else 662 return -1; 663 } 664 665 static int lrc_ring_gpr0(const struct intel_engine_cs *engine) 666 { 667 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 668 return 0x84; 669 else if (GRAPHICS_VER(engine->i915) >= 12) 670 return 0x74; 671 else if (GRAPHICS_VER(engine->i915) >= 9) 672 return 0x68; 673 else if (engine->class == RENDER_CLASS) 674 return 0xd8; 675 else 676 return -1; 677 } 678 679 static int lrc_ring_wa_bb_per_ctx(const struct intel_engine_cs *engine) 680 { 681 if (GRAPHICS_VER(engine->i915) >= 12) 682 return 0x12; 683 else if (GRAPHICS_VER(engine->i915) >= 9 || engine->class == RENDER_CLASS) 684 return 0x18; 685 else 686 return -1; 687 } 688 689 static int lrc_ring_indirect_ptr(const struct intel_engine_cs *engine) 690 { 691 int x; 692 693 x = lrc_ring_wa_bb_per_ctx(engine); 694 if (x < 0) 695 return x; 696 697 return x + 2; 698 } 699 700 static int lrc_ring_indirect_offset(const struct intel_engine_cs *engine) 701 { 702 int x; 703 704 x = lrc_ring_indirect_ptr(engine); 705 if (x < 0) 706 return x; 707 708 return x + 2; 709 } 710 711 static int lrc_ring_cmd_buf_cctl(const struct intel_engine_cs *engine) 712 { 713 714 if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) 715 /* 716 * Note that the CSFE context has a dummy slot for CMD_BUF_CCTL 717 * simply to match the RCS context image layout. 718 */ 719 return 0xc6; 720 else if (engine->class != RENDER_CLASS) 721 return -1; 722 else if (GRAPHICS_VER(engine->i915) >= 12) 723 return 0xb6; 724 else if (GRAPHICS_VER(engine->i915) >= 11) 725 return 0xaa; 726 else 727 return -1; 728 } 729 730 static u32 731 lrc_ring_indirect_offset_default(const struct intel_engine_cs *engine) 732 { 733 switch (GRAPHICS_VER(engine->i915)) { 734 default: 735 MISSING_CASE(GRAPHICS_VER(engine->i915)); 736 fallthrough; 737 case 12: 738 return GEN12_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 739 case 11: 740 return GEN11_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 741 case 9: 742 return GEN9_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 743 case 8: 744 return GEN8_CTX_RCS_INDIRECT_CTX_OFFSET_DEFAULT; 745 } 746 } 747 748 static void 749 lrc_setup_indirect_ctx(u32 *regs, 750 const struct intel_engine_cs *engine, 751 u32 ctx_bb_ggtt_addr, 752 u32 size) 753 { 754 GEM_BUG_ON(!size); 755 GEM_BUG_ON(!IS_ALIGNED(size, CACHELINE_BYTES)); 756 GEM_BUG_ON(lrc_ring_indirect_ptr(engine) == -1); 757 regs[lrc_ring_indirect_ptr(engine) + 1] = 758 ctx_bb_ggtt_addr | (size / CACHELINE_BYTES); 759 760 GEM_BUG_ON(lrc_ring_indirect_offset(engine) == -1); 761 regs[lrc_ring_indirect_offset(engine) + 1] = 762 lrc_ring_indirect_offset_default(engine) << 6; 763 } 764 765 static void init_common_regs(u32 * const regs, 766 const struct intel_context *ce, 767 const struct intel_engine_cs *engine, 768 bool inhibit) 769 { 770 u32 ctl; 771 772 ctl = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH); 773 ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); 774 if (inhibit) 775 ctl |= CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT; 776 if (GRAPHICS_VER(engine->i915) < 11) 777 ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT | 778 CTX_CTRL_RS_CTX_ENABLE); 779 regs[CTX_CONTEXT_CONTROL] = ctl; 780 781 regs[CTX_TIMESTAMP] = ce->stats.runtime.last; 782 } 783 784 static void init_wa_bb_regs(u32 * const regs, 785 const struct intel_engine_cs *engine) 786 { 787 const struct i915_ctx_workarounds * const wa_ctx = &engine->wa_ctx; 788 789 if (wa_ctx->per_ctx.size) { 790 const u32 ggtt_offset = i915_ggtt_offset(wa_ctx->vma); 791 792 GEM_BUG_ON(lrc_ring_wa_bb_per_ctx(engine) == -1); 793 regs[lrc_ring_wa_bb_per_ctx(engine) + 1] = 794 (ggtt_offset + wa_ctx->per_ctx.offset) | 0x01; 795 } 796 797 if (wa_ctx->indirect_ctx.size) { 798 lrc_setup_indirect_ctx(regs, engine, 799 i915_ggtt_offset(wa_ctx->vma) + 800 wa_ctx->indirect_ctx.offset, 801 wa_ctx->indirect_ctx.size); 802 } 803 } 804 805 static void init_ppgtt_regs(u32 *regs, const struct i915_ppgtt *ppgtt) 806 { 807 if (i915_vm_is_4lvl(&ppgtt->vm)) { 808 /* 64b PPGTT (48bit canonical) 809 * PDP0_DESCRIPTOR contains the base address to PML4 and 810 * other PDP Descriptors are ignored. 811 */ 812 ASSIGN_CTX_PML4(ppgtt, regs); 813 } else { 814 ASSIGN_CTX_PDP(ppgtt, regs, 3); 815 ASSIGN_CTX_PDP(ppgtt, regs, 2); 816 ASSIGN_CTX_PDP(ppgtt, regs, 1); 817 ASSIGN_CTX_PDP(ppgtt, regs, 0); 818 } 819 } 820 821 static struct i915_ppgtt *vm_alias(struct i915_address_space *vm) 822 { 823 if (i915_is_ggtt(vm)) 824 return i915_vm_to_ggtt(vm)->alias; 825 else 826 return i915_vm_to_ppgtt(vm); 827 } 828 829 static void __reset_stop_ring(u32 *regs, const struct intel_engine_cs *engine) 830 { 831 int x; 832 833 x = lrc_ring_mi_mode(engine); 834 if (x != -1) { 835 regs[x + 1] &= ~STOP_RING; 836 regs[x + 1] |= STOP_RING << 16; 837 } 838 } 839 840 static void __lrc_init_regs(u32 *regs, 841 const struct intel_context *ce, 842 const struct intel_engine_cs *engine, 843 bool inhibit) 844 { 845 /* 846 * A context is actually a big batch buffer with several 847 * MI_LOAD_REGISTER_IMM commands followed by (reg, value) pairs. The 848 * values we are setting here are only for the first context restore: 849 * on a subsequent save, the GPU will recreate this batchbuffer with new 850 * values (including all the missing MI_LOAD_REGISTER_IMM commands that 851 * we are not initializing here). 852 * 853 * Must keep consistent with virtual_update_register_offsets(). 854 */ 855 856 if (inhibit) 857 memset(regs, 0, PAGE_SIZE); 858 859 set_offsets(regs, reg_offsets(engine), engine, inhibit); 860 861 init_common_regs(regs, ce, engine, inhibit); 862 init_ppgtt_regs(regs, vm_alias(ce->vm)); 863 864 init_wa_bb_regs(regs, engine); 865 866 __reset_stop_ring(regs, engine); 867 } 868 869 void lrc_init_regs(const struct intel_context *ce, 870 const struct intel_engine_cs *engine, 871 bool inhibit) 872 { 873 __lrc_init_regs(ce->lrc_reg_state, ce, engine, inhibit); 874 } 875 876 void lrc_reset_regs(const struct intel_context *ce, 877 const struct intel_engine_cs *engine) 878 { 879 __reset_stop_ring(ce->lrc_reg_state, engine); 880 } 881 882 static void 883 set_redzone(void *vaddr, const struct intel_engine_cs *engine) 884 { 885 if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 886 return; 887 888 vaddr += engine->context_size; 889 890 memset(vaddr, CONTEXT_REDZONE, I915_GTT_PAGE_SIZE); 891 } 892 893 static void 894 check_redzone(const void *vaddr, const struct intel_engine_cs *engine) 895 { 896 if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 897 return; 898 899 vaddr += engine->context_size; 900 901 if (memchr_inv(vaddr, CONTEXT_REDZONE, I915_GTT_PAGE_SIZE)) 902 drm_err_once(&engine->i915->drm, 903 "%s context redzone overwritten!\n", 904 engine->name); 905 } 906 907 static u32 context_wa_bb_offset(const struct intel_context *ce) 908 { 909 return PAGE_SIZE * ce->wa_bb_page; 910 } 911 912 static u32 *context_indirect_bb(const struct intel_context *ce) 913 { 914 void *ptr; 915 916 GEM_BUG_ON(!ce->wa_bb_page); 917 918 ptr = ce->lrc_reg_state; 919 ptr -= LRC_STATE_OFFSET; /* back to start of context image */ 920 ptr += context_wa_bb_offset(ce); 921 922 return ptr; 923 } 924 925 void lrc_init_state(struct intel_context *ce, 926 struct intel_engine_cs *engine, 927 void *state) 928 { 929 bool inhibit = true; 930 931 set_redzone(state, engine); 932 933 if (engine->default_state) { 934 shmem_read(engine->default_state, 0, 935 state, engine->context_size); 936 __set_bit(CONTEXT_VALID_BIT, &ce->flags); 937 inhibit = false; 938 } 939 940 /* Clear the ppHWSP (inc. per-context counters) */ 941 memset(state, 0, PAGE_SIZE); 942 943 /* Clear the indirect wa and storage */ 944 if (ce->wa_bb_page) 945 memset(state + context_wa_bb_offset(ce), 0, PAGE_SIZE); 946 947 /* 948 * The second page of the context object contains some registers which 949 * must be set up prior to the first execution. 950 */ 951 __lrc_init_regs(state + LRC_STATE_OFFSET, ce, engine, inhibit); 952 } 953 954 u32 lrc_indirect_bb(const struct intel_context *ce) 955 { 956 return i915_ggtt_offset(ce->state) + context_wa_bb_offset(ce); 957 } 958 959 static u32 *setup_predicate_disable_wa(const struct intel_context *ce, u32 *cs) 960 { 961 /* If predication is active, this will be noop'ed */ 962 *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT | (4 - 2); 963 *cs++ = lrc_indirect_bb(ce) + DG2_PREDICATE_RESULT_WA; 964 *cs++ = 0; 965 *cs++ = 0; /* No predication */ 966 967 /* predicated end, only terminates if SET_PREDICATE_RESULT:0 is clear */ 968 *cs++ = MI_BATCH_BUFFER_END | BIT(15); 969 *cs++ = MI_SET_PREDICATE | MI_SET_PREDICATE_DISABLE; 970 971 /* Instructions are no longer predicated (disabled), we can proceed */ 972 *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT | (4 - 2); 973 *cs++ = lrc_indirect_bb(ce) + DG2_PREDICATE_RESULT_WA; 974 *cs++ = 0; 975 *cs++ = 1; /* enable predication before the next BB */ 976 977 *cs++ = MI_BATCH_BUFFER_END; 978 GEM_BUG_ON(offset_in_page(cs) > DG2_PREDICATE_RESULT_WA); 979 980 return cs; 981 } 982 983 static struct i915_vma * 984 __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine) 985 { 986 struct drm_i915_gem_object *obj; 987 struct i915_vma *vma; 988 u32 context_size; 989 990 context_size = round_up(engine->context_size, I915_GTT_PAGE_SIZE); 991 992 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 993 context_size += I915_GTT_PAGE_SIZE; /* for redzone */ 994 995 if (GRAPHICS_VER(engine->i915) == 12) { 996 ce->wa_bb_page = context_size / PAGE_SIZE; 997 context_size += PAGE_SIZE; 998 } 999 1000 if (intel_context_is_parent(ce) && intel_engine_uses_guc(engine)) { 1001 ce->parallel.guc.parent_page = context_size / PAGE_SIZE; 1002 context_size += PARENT_SCRATCH_SIZE; 1003 } 1004 1005 obj = i915_gem_object_create_lmem(engine->i915, context_size, 1006 I915_BO_ALLOC_PM_VOLATILE); 1007 if (IS_ERR(obj)) 1008 obj = i915_gem_object_create_shmem(engine->i915, context_size); 1009 if (IS_ERR(obj)) 1010 return ERR_CAST(obj); 1011 1012 vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); 1013 if (IS_ERR(vma)) { 1014 i915_gem_object_put(obj); 1015 return vma; 1016 } 1017 1018 return vma; 1019 } 1020 1021 static struct intel_timeline * 1022 pinned_timeline(struct intel_context *ce, struct intel_engine_cs *engine) 1023 { 1024 struct intel_timeline *tl = fetch_and_zero(&ce->timeline); 1025 1026 return intel_timeline_create_from_engine(engine, page_unmask_bits(tl)); 1027 } 1028 1029 int lrc_alloc(struct intel_context *ce, struct intel_engine_cs *engine) 1030 { 1031 struct intel_ring *ring; 1032 struct i915_vma *vma; 1033 int err; 1034 1035 GEM_BUG_ON(ce->state); 1036 1037 vma = __lrc_alloc_state(ce, engine); 1038 if (IS_ERR(vma)) 1039 return PTR_ERR(vma); 1040 1041 ring = intel_engine_create_ring(engine, ce->ring_size); 1042 if (IS_ERR(ring)) { 1043 err = PTR_ERR(ring); 1044 goto err_vma; 1045 } 1046 1047 if (!page_mask_bits(ce->timeline)) { 1048 struct intel_timeline *tl; 1049 1050 /* 1051 * Use the static global HWSP for the kernel context, and 1052 * a dynamically allocated cacheline for everyone else. 1053 */ 1054 if (unlikely(ce->timeline)) 1055 tl = pinned_timeline(ce, engine); 1056 else 1057 tl = intel_timeline_create(engine->gt); 1058 if (IS_ERR(tl)) { 1059 err = PTR_ERR(tl); 1060 goto err_ring; 1061 } 1062 1063 ce->timeline = tl; 1064 } 1065 1066 ce->ring = ring; 1067 ce->state = vma; 1068 1069 return 0; 1070 1071 err_ring: 1072 intel_ring_put(ring); 1073 err_vma: 1074 i915_vma_put(vma); 1075 return err; 1076 } 1077 1078 void lrc_reset(struct intel_context *ce) 1079 { 1080 GEM_BUG_ON(!intel_context_is_pinned(ce)); 1081 1082 intel_ring_reset(ce->ring, ce->ring->emit); 1083 1084 /* Scrub away the garbage */ 1085 lrc_init_regs(ce, ce->engine, true); 1086 ce->lrc.lrca = lrc_update_regs(ce, ce->engine, ce->ring->tail); 1087 } 1088 1089 int 1090 lrc_pre_pin(struct intel_context *ce, 1091 struct intel_engine_cs *engine, 1092 struct i915_gem_ww_ctx *ww, 1093 void **vaddr) 1094 { 1095 GEM_BUG_ON(!ce->state); 1096 GEM_BUG_ON(!i915_vma_is_pinned(ce->state)); 1097 1098 *vaddr = i915_gem_object_pin_map(ce->state->obj, 1099 i915_coherent_map_type(ce->engine->i915, 1100 ce->state->obj, 1101 false) | 1102 I915_MAP_OVERRIDE); 1103 1104 return PTR_ERR_OR_ZERO(*vaddr); 1105 } 1106 1107 int 1108 lrc_pin(struct intel_context *ce, 1109 struct intel_engine_cs *engine, 1110 void *vaddr) 1111 { 1112 ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET; 1113 1114 if (!__test_and_set_bit(CONTEXT_INIT_BIT, &ce->flags)) 1115 lrc_init_state(ce, engine, vaddr); 1116 1117 ce->lrc.lrca = lrc_update_regs(ce, engine, ce->ring->tail); 1118 return 0; 1119 } 1120 1121 void lrc_unpin(struct intel_context *ce) 1122 { 1123 if (unlikely(ce->parallel.last_rq)) { 1124 i915_request_put(ce->parallel.last_rq); 1125 ce->parallel.last_rq = NULL; 1126 } 1127 check_redzone((void *)ce->lrc_reg_state - LRC_STATE_OFFSET, 1128 ce->engine); 1129 } 1130 1131 void lrc_post_unpin(struct intel_context *ce) 1132 { 1133 i915_gem_object_unpin_map(ce->state->obj); 1134 } 1135 1136 void lrc_fini(struct intel_context *ce) 1137 { 1138 if (!ce->state) 1139 return; 1140 1141 intel_ring_put(fetch_and_zero(&ce->ring)); 1142 i915_vma_put(fetch_and_zero(&ce->state)); 1143 } 1144 1145 void lrc_destroy(struct kref *kref) 1146 { 1147 struct intel_context *ce = container_of(kref, typeof(*ce), ref); 1148 1149 GEM_BUG_ON(!i915_active_is_idle(&ce->active)); 1150 GEM_BUG_ON(intel_context_is_pinned(ce)); 1151 1152 lrc_fini(ce); 1153 1154 intel_context_fini(ce); 1155 intel_context_free(ce); 1156 } 1157 1158 static u32 * 1159 gen12_emit_timestamp_wa(const struct intel_context *ce, u32 *cs) 1160 { 1161 *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | 1162 MI_SRM_LRM_GLOBAL_GTT | 1163 MI_LRI_LRM_CS_MMIO; 1164 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1165 *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + 1166 CTX_TIMESTAMP * sizeof(u32); 1167 *cs++ = 0; 1168 1169 *cs++ = MI_LOAD_REGISTER_REG | 1170 MI_LRR_SOURCE_CS_MMIO | 1171 MI_LRI_LRM_CS_MMIO; 1172 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1173 *cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(0)); 1174 1175 *cs++ = MI_LOAD_REGISTER_REG | 1176 MI_LRR_SOURCE_CS_MMIO | 1177 MI_LRI_LRM_CS_MMIO; 1178 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1179 *cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(0)); 1180 1181 return cs; 1182 } 1183 1184 static u32 * 1185 gen12_emit_restore_scratch(const struct intel_context *ce, u32 *cs) 1186 { 1187 GEM_BUG_ON(lrc_ring_gpr0(ce->engine) == -1); 1188 1189 *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | 1190 MI_SRM_LRM_GLOBAL_GTT | 1191 MI_LRI_LRM_CS_MMIO; 1192 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1193 *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + 1194 (lrc_ring_gpr0(ce->engine) + 1) * sizeof(u32); 1195 *cs++ = 0; 1196 1197 return cs; 1198 } 1199 1200 static u32 * 1201 gen12_emit_cmd_buf_wa(const struct intel_context *ce, u32 *cs) 1202 { 1203 GEM_BUG_ON(lrc_ring_cmd_buf_cctl(ce->engine) == -1); 1204 1205 *cs++ = MI_LOAD_REGISTER_MEM_GEN8 | 1206 MI_SRM_LRM_GLOBAL_GTT | 1207 MI_LRI_LRM_CS_MMIO; 1208 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1209 *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET + 1210 (lrc_ring_cmd_buf_cctl(ce->engine) + 1) * sizeof(u32); 1211 *cs++ = 0; 1212 1213 *cs++ = MI_LOAD_REGISTER_REG | 1214 MI_LRR_SOURCE_CS_MMIO | 1215 MI_LRI_LRM_CS_MMIO; 1216 *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0)); 1217 *cs++ = i915_mmio_reg_offset(RING_CMD_BUF_CCTL(0)); 1218 1219 return cs; 1220 } 1221 1222 /* 1223 * On DG2 during context restore of a preempted context in GPGPU mode, 1224 * RCS restore hang is detected. This is extremely timing dependent. 1225 * To address this below sw wabb is implemented for DG2 A steppings. 1226 */ 1227 static u32 * 1228 dg2_emit_rcs_hang_wabb(const struct intel_context *ce, u32 *cs) 1229 { 1230 *cs++ = MI_LOAD_REGISTER_IMM(1); 1231 *cs++ = i915_mmio_reg_offset(GEN12_STATE_ACK_DEBUG); 1232 *cs++ = 0x21; 1233 1234 *cs++ = MI_LOAD_REGISTER_REG; 1235 *cs++ = i915_mmio_reg_offset(RING_NOPID(ce->engine->mmio_base)); 1236 *cs++ = i915_mmio_reg_offset(GEN12_CULLBIT1); 1237 1238 *cs++ = MI_LOAD_REGISTER_REG; 1239 *cs++ = i915_mmio_reg_offset(RING_NOPID(ce->engine->mmio_base)); 1240 *cs++ = i915_mmio_reg_offset(GEN12_CULLBIT2); 1241 1242 return cs; 1243 } 1244 1245 /* 1246 * The bspec's tuning guide asks us to program a vertical watermark value of 1247 * 0x3FF. However this register is not saved/restored properly by the 1248 * hardware, so we're required to apply the desired value via INDIRECT_CTX 1249 * batch buffer to ensure the value takes effect properly. All other bits 1250 * in this register should remain at 0 (the hardware default). 1251 */ 1252 static u32 * 1253 dg2_emit_draw_watermark_setting(u32 *cs) 1254 { 1255 *cs++ = MI_LOAD_REGISTER_IMM(1); 1256 *cs++ = i915_mmio_reg_offset(DRAW_WATERMARK); 1257 *cs++ = REG_FIELD_PREP(VERT_WM_VAL, 0x3FF); 1258 1259 return cs; 1260 } 1261 1262 static u32 * 1263 gen12_emit_indirect_ctx_rcs(const struct intel_context *ce, u32 *cs) 1264 { 1265 cs = gen12_emit_timestamp_wa(ce, cs); 1266 cs = gen12_emit_cmd_buf_wa(ce, cs); 1267 cs = gen12_emit_restore_scratch(ce, cs); 1268 1269 /* Wa_22011450934:dg2 */ 1270 if (IS_DG2_GRAPHICS_STEP(ce->engine->i915, G10, STEP_A0, STEP_B0) || 1271 IS_DG2_GRAPHICS_STEP(ce->engine->i915, G11, STEP_A0, STEP_B0)) 1272 cs = dg2_emit_rcs_hang_wabb(ce, cs); 1273 1274 /* Wa_16013000631:dg2 */ 1275 if (IS_DG2_GRAPHICS_STEP(ce->engine->i915, G10, STEP_B0, STEP_C0) || 1276 IS_DG2_G11(ce->engine->i915)) 1277 cs = gen8_emit_pipe_control(cs, PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE, 0); 1278 1279 /* hsdes: 1809175790 */ 1280 if (!HAS_FLAT_CCS(ce->engine->i915)) 1281 cs = gen12_emit_aux_table_inv(cs, GEN12_GFX_CCS_AUX_NV); 1282 1283 /* Wa_16014892111 */ 1284 if (IS_DG2(ce->engine->i915)) 1285 cs = dg2_emit_draw_watermark_setting(cs); 1286 1287 return cs; 1288 } 1289 1290 static u32 * 1291 gen12_emit_indirect_ctx_xcs(const struct intel_context *ce, u32 *cs) 1292 { 1293 cs = gen12_emit_timestamp_wa(ce, cs); 1294 cs = gen12_emit_restore_scratch(ce, cs); 1295 1296 /* Wa_16013000631:dg2 */ 1297 if (IS_DG2_GRAPHICS_STEP(ce->engine->i915, G10, STEP_B0, STEP_C0) || 1298 IS_DG2_G11(ce->engine->i915)) 1299 if (ce->engine->class == COMPUTE_CLASS) 1300 cs = gen8_emit_pipe_control(cs, 1301 PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE, 1302 0); 1303 1304 /* hsdes: 1809175790 */ 1305 if (!HAS_FLAT_CCS(ce->engine->i915)) { 1306 if (ce->engine->class == VIDEO_DECODE_CLASS) 1307 cs = gen12_emit_aux_table_inv(cs, GEN12_VD0_AUX_NV); 1308 else if (ce->engine->class == VIDEO_ENHANCEMENT_CLASS) 1309 cs = gen12_emit_aux_table_inv(cs, GEN12_VE0_AUX_NV); 1310 } 1311 1312 return cs; 1313 } 1314 1315 static void 1316 setup_indirect_ctx_bb(const struct intel_context *ce, 1317 const struct intel_engine_cs *engine, 1318 u32 *(*emit)(const struct intel_context *, u32 *)) 1319 { 1320 u32 * const start = context_indirect_bb(ce); 1321 u32 *cs; 1322 1323 cs = emit(ce, start); 1324 GEM_BUG_ON(cs - start > I915_GTT_PAGE_SIZE / sizeof(*cs)); 1325 while ((unsigned long)cs % CACHELINE_BYTES) 1326 *cs++ = MI_NOOP; 1327 1328 GEM_BUG_ON(cs - start > DG2_PREDICATE_RESULT_BB / sizeof(*start)); 1329 setup_predicate_disable_wa(ce, start + DG2_PREDICATE_RESULT_BB / sizeof(*start)); 1330 1331 lrc_setup_indirect_ctx(ce->lrc_reg_state, engine, 1332 lrc_indirect_bb(ce), 1333 (cs - start) * sizeof(*cs)); 1334 } 1335 1336 /* 1337 * The context descriptor encodes various attributes of a context, 1338 * including its GTT address and some flags. Because it's fairly 1339 * expensive to calculate, we'll just do it once and cache the result, 1340 * which remains valid until the context is unpinned. 1341 * 1342 * This is what a descriptor looks like, from LSB to MSB:: 1343 * 1344 * bits 0-11: flags, GEN8_CTX_* (cached in ctx->desc_template) 1345 * bits 12-31: LRCA, GTT address of (the HWSP of) this context 1346 * bits 32-52: ctx ID, a globally unique tag (highest bit used by GuC) 1347 * bits 53-54: mbz, reserved for use by hardware 1348 * bits 55-63: group ID, currently unused and set to 0 1349 * 1350 * Starting from Gen11, the upper dword of the descriptor has a new format: 1351 * 1352 * bits 32-36: reserved 1353 * bits 37-47: SW context ID 1354 * bits 48:53: engine instance 1355 * bit 54: mbz, reserved for use by hardware 1356 * bits 55-60: SW counter 1357 * bits 61-63: engine class 1358 * 1359 * On Xe_HP, the upper dword of the descriptor has a new format: 1360 * 1361 * bits 32-37: virtual function number 1362 * bit 38: mbz, reserved for use by hardware 1363 * bits 39-54: SW context ID 1364 * bits 55-57: reserved 1365 * bits 58-63: SW counter 1366 * 1367 * engine info, SW context ID and SW counter need to form a unique number 1368 * (Context ID) per lrc. 1369 */ 1370 static u32 lrc_descriptor(const struct intel_context *ce) 1371 { 1372 u32 desc; 1373 1374 desc = INTEL_LEGACY_32B_CONTEXT; 1375 if (i915_vm_is_4lvl(ce->vm)) 1376 desc = INTEL_LEGACY_64B_CONTEXT; 1377 desc <<= GEN8_CTX_ADDRESSING_MODE_SHIFT; 1378 1379 desc |= GEN8_CTX_VALID | GEN8_CTX_PRIVILEGE; 1380 if (GRAPHICS_VER(ce->vm->i915) == 8) 1381 desc |= GEN8_CTX_L3LLC_COHERENT; 1382 1383 return i915_ggtt_offset(ce->state) | desc; 1384 } 1385 1386 u32 lrc_update_regs(const struct intel_context *ce, 1387 const struct intel_engine_cs *engine, 1388 u32 head) 1389 { 1390 struct intel_ring *ring = ce->ring; 1391 u32 *regs = ce->lrc_reg_state; 1392 1393 GEM_BUG_ON(!intel_ring_offset_valid(ring, head)); 1394 GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->tail)); 1395 1396 regs[CTX_RING_START] = i915_ggtt_offset(ring->vma); 1397 regs[CTX_RING_HEAD] = head; 1398 regs[CTX_RING_TAIL] = ring->tail; 1399 regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID; 1400 1401 /* RPCS */ 1402 if (engine->class == RENDER_CLASS) { 1403 regs[CTX_R_PWR_CLK_STATE] = 1404 intel_sseu_make_rpcs(engine->gt, &ce->sseu); 1405 1406 i915_oa_init_reg_state(ce, engine); 1407 } 1408 1409 if (ce->wa_bb_page) { 1410 u32 *(*fn)(const struct intel_context *ce, u32 *cs); 1411 1412 fn = gen12_emit_indirect_ctx_xcs; 1413 if (ce->engine->class == RENDER_CLASS) 1414 fn = gen12_emit_indirect_ctx_rcs; 1415 1416 /* Mutually exclusive wrt to global indirect bb */ 1417 GEM_BUG_ON(engine->wa_ctx.indirect_ctx.size); 1418 setup_indirect_ctx_bb(ce, engine, fn); 1419 } 1420 1421 return lrc_descriptor(ce) | CTX_DESC_FORCE_RESTORE; 1422 } 1423 1424 void lrc_update_offsets(struct intel_context *ce, 1425 struct intel_engine_cs *engine) 1426 { 1427 set_offsets(ce->lrc_reg_state, reg_offsets(engine), engine, false); 1428 } 1429 1430 void lrc_check_regs(const struct intel_context *ce, 1431 const struct intel_engine_cs *engine, 1432 const char *when) 1433 { 1434 const struct intel_ring *ring = ce->ring; 1435 u32 *regs = ce->lrc_reg_state; 1436 bool valid = true; 1437 int x; 1438 1439 if (regs[CTX_RING_START] != i915_ggtt_offset(ring->vma)) { 1440 pr_err("%s: context submitted with incorrect RING_START [%08x], expected %08x\n", 1441 engine->name, 1442 regs[CTX_RING_START], 1443 i915_ggtt_offset(ring->vma)); 1444 regs[CTX_RING_START] = i915_ggtt_offset(ring->vma); 1445 valid = false; 1446 } 1447 1448 if ((regs[CTX_RING_CTL] & ~(RING_WAIT | RING_WAIT_SEMAPHORE)) != 1449 (RING_CTL_SIZE(ring->size) | RING_VALID)) { 1450 pr_err("%s: context submitted with incorrect RING_CTL [%08x], expected %08x\n", 1451 engine->name, 1452 regs[CTX_RING_CTL], 1453 (u32)(RING_CTL_SIZE(ring->size) | RING_VALID)); 1454 regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID; 1455 valid = false; 1456 } 1457 1458 x = lrc_ring_mi_mode(engine); 1459 if (x != -1 && regs[x + 1] & (regs[x + 1] >> 16) & STOP_RING) { 1460 pr_err("%s: context submitted with STOP_RING [%08x] in RING_MI_MODE\n", 1461 engine->name, regs[x + 1]); 1462 regs[x + 1] &= ~STOP_RING; 1463 regs[x + 1] |= STOP_RING << 16; 1464 valid = false; 1465 } 1466 1467 WARN_ONCE(!valid, "Invalid lrc state found %s submission\n", when); 1468 } 1469 1470 /* 1471 * In this WA we need to set GEN8_L3SQCREG4[21:21] and reset it after 1472 * PIPE_CONTROL instruction. This is required for the flush to happen correctly 1473 * but there is a slight complication as this is applied in WA batch where the 1474 * values are only initialized once so we cannot take register value at the 1475 * beginning and reuse it further; hence we save its value to memory, upload a 1476 * constant value with bit21 set and then we restore it back with the saved value. 1477 * To simplify the WA, a constant value is formed by using the default value 1478 * of this register. This shouldn't be a problem because we are only modifying 1479 * it for a short period and this batch in non-premptible. We can ofcourse 1480 * use additional instructions that read the actual value of the register 1481 * at that time and set our bit of interest but it makes the WA complicated. 1482 * 1483 * This WA is also required for Gen9 so extracting as a function avoids 1484 * code duplication. 1485 */ 1486 static u32 * 1487 gen8_emit_flush_coherentl3_wa(struct intel_engine_cs *engine, u32 *batch) 1488 { 1489 /* NB no one else is allowed to scribble over scratch + 256! */ 1490 *batch++ = MI_STORE_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT; 1491 *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4); 1492 *batch++ = intel_gt_scratch_offset(engine->gt, 1493 INTEL_GT_SCRATCH_FIELD_COHERENTL3_WA); 1494 *batch++ = 0; 1495 1496 *batch++ = MI_LOAD_REGISTER_IMM(1); 1497 *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4); 1498 *batch++ = 0x40400000 | GEN8_LQSC_FLUSH_COHERENT_LINES; 1499 1500 batch = gen8_emit_pipe_control(batch, 1501 PIPE_CONTROL_CS_STALL | 1502 PIPE_CONTROL_DC_FLUSH_ENABLE, 1503 0); 1504 1505 *batch++ = MI_LOAD_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT; 1506 *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4); 1507 *batch++ = intel_gt_scratch_offset(engine->gt, 1508 INTEL_GT_SCRATCH_FIELD_COHERENTL3_WA); 1509 *batch++ = 0; 1510 1511 return batch; 1512 } 1513 1514 /* 1515 * Typically we only have one indirect_ctx and per_ctx batch buffer which are 1516 * initialized at the beginning and shared across all contexts but this field 1517 * helps us to have multiple batches at different offsets and select them based 1518 * on a criteria. At the moment this batch always start at the beginning of the page 1519 * and at this point we don't have multiple wa_ctx batch buffers. 1520 * 1521 * The number of WA applied are not known at the beginning; we use this field 1522 * to return the no of DWORDS written. 1523 * 1524 * It is to be noted that this batch does not contain MI_BATCH_BUFFER_END 1525 * so it adds NOOPs as padding to make it cacheline aligned. 1526 * MI_BATCH_BUFFER_END will be added to perctx batch and both of them together 1527 * makes a complete batch buffer. 1528 */ 1529 static u32 *gen8_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch) 1530 { 1531 /* WaDisableCtxRestoreArbitration:bdw,chv */ 1532 *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; 1533 1534 /* WaFlushCoherentL3CacheLinesAtContextSwitch:bdw */ 1535 if (IS_BROADWELL(engine->i915)) 1536 batch = gen8_emit_flush_coherentl3_wa(engine, batch); 1537 1538 /* WaClearSlmSpaceAtContextSwitch:bdw,chv */ 1539 /* Actual scratch location is at 128 bytes offset */ 1540 batch = gen8_emit_pipe_control(batch, 1541 PIPE_CONTROL_FLUSH_L3 | 1542 PIPE_CONTROL_STORE_DATA_INDEX | 1543 PIPE_CONTROL_CS_STALL | 1544 PIPE_CONTROL_QW_WRITE, 1545 LRC_PPHWSP_SCRATCH_ADDR); 1546 1547 *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; 1548 1549 /* Pad to end of cacheline */ 1550 while ((unsigned long)batch % CACHELINE_BYTES) 1551 *batch++ = MI_NOOP; 1552 1553 /* 1554 * MI_BATCH_BUFFER_END is not required in Indirect ctx BB because 1555 * execution depends on the length specified in terms of cache lines 1556 * in the register CTX_RCS_INDIRECT_CTX 1557 */ 1558 1559 return batch; 1560 } 1561 1562 struct lri { 1563 i915_reg_t reg; 1564 u32 value; 1565 }; 1566 1567 static u32 *emit_lri(u32 *batch, const struct lri *lri, unsigned int count) 1568 { 1569 GEM_BUG_ON(!count || count > 63); 1570 1571 *batch++ = MI_LOAD_REGISTER_IMM(count); 1572 do { 1573 *batch++ = i915_mmio_reg_offset(lri->reg); 1574 *batch++ = lri->value; 1575 } while (lri++, --count); 1576 *batch++ = MI_NOOP; 1577 1578 return batch; 1579 } 1580 1581 static u32 *gen9_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch) 1582 { 1583 static const struct lri lri[] = { 1584 /* WaDisableGatherAtSetShaderCommonSlice:skl,bxt,kbl,glk */ 1585 { 1586 COMMON_SLICE_CHICKEN2, 1587 __MASKED_FIELD(GEN9_DISABLE_GATHER_AT_SET_SHADER_COMMON_SLICE, 1588 0), 1589 }, 1590 1591 /* BSpec: 11391 */ 1592 { 1593 FF_SLICE_CHICKEN, 1594 __MASKED_FIELD(FF_SLICE_CHICKEN_CL_PROVOKING_VERTEX_FIX, 1595 FF_SLICE_CHICKEN_CL_PROVOKING_VERTEX_FIX), 1596 }, 1597 1598 /* BSpec: 11299 */ 1599 { 1600 _3D_CHICKEN3, 1601 __MASKED_FIELD(_3D_CHICKEN_SF_PROVOKING_VERTEX_FIX, 1602 _3D_CHICKEN_SF_PROVOKING_VERTEX_FIX), 1603 } 1604 }; 1605 1606 *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; 1607 1608 /* WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt,glk */ 1609 batch = gen8_emit_flush_coherentl3_wa(engine, batch); 1610 1611 /* WaClearSlmSpaceAtContextSwitch:skl,bxt,kbl,glk,cfl */ 1612 batch = gen8_emit_pipe_control(batch, 1613 PIPE_CONTROL_FLUSH_L3 | 1614 PIPE_CONTROL_STORE_DATA_INDEX | 1615 PIPE_CONTROL_CS_STALL | 1616 PIPE_CONTROL_QW_WRITE, 1617 LRC_PPHWSP_SCRATCH_ADDR); 1618 1619 batch = emit_lri(batch, lri, ARRAY_SIZE(lri)); 1620 1621 /* WaMediaPoolStateCmdInWABB:bxt,glk */ 1622 if (HAS_POOLED_EU(engine->i915)) { 1623 /* 1624 * EU pool configuration is setup along with golden context 1625 * during context initialization. This value depends on 1626 * device type (2x6 or 3x6) and needs to be updated based 1627 * on which subslice is disabled especially for 2x6 1628 * devices, however it is safe to load default 1629 * configuration of 3x6 device instead of masking off 1630 * corresponding bits because HW ignores bits of a disabled 1631 * subslice and drops down to appropriate config. Please 1632 * see render_state_setup() in i915_gem_render_state.c for 1633 * possible configurations, to avoid duplication they are 1634 * not shown here again. 1635 */ 1636 *batch++ = GEN9_MEDIA_POOL_STATE; 1637 *batch++ = GEN9_MEDIA_POOL_ENABLE; 1638 *batch++ = 0x00777000; 1639 *batch++ = 0; 1640 *batch++ = 0; 1641 *batch++ = 0; 1642 } 1643 1644 *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; 1645 1646 /* Pad to end of cacheline */ 1647 while ((unsigned long)batch % CACHELINE_BYTES) 1648 *batch++ = MI_NOOP; 1649 1650 return batch; 1651 } 1652 1653 #define CTX_WA_BB_SIZE (PAGE_SIZE) 1654 1655 static int lrc_create_wa_ctx(struct intel_engine_cs *engine) 1656 { 1657 struct drm_i915_gem_object *obj; 1658 struct i915_vma *vma; 1659 int err; 1660 1661 obj = i915_gem_object_create_shmem(engine->i915, CTX_WA_BB_SIZE); 1662 if (IS_ERR(obj)) 1663 return PTR_ERR(obj); 1664 1665 vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); 1666 if (IS_ERR(vma)) { 1667 err = PTR_ERR(vma); 1668 goto err; 1669 } 1670 1671 engine->wa_ctx.vma = vma; 1672 return 0; 1673 1674 err: 1675 i915_gem_object_put(obj); 1676 return err; 1677 } 1678 1679 void lrc_fini_wa_ctx(struct intel_engine_cs *engine) 1680 { 1681 i915_vma_unpin_and_release(&engine->wa_ctx.vma, 0); 1682 } 1683 1684 typedef u32 *(*wa_bb_func_t)(struct intel_engine_cs *engine, u32 *batch); 1685 1686 void lrc_init_wa_ctx(struct intel_engine_cs *engine) 1687 { 1688 struct i915_ctx_workarounds *wa_ctx = &engine->wa_ctx; 1689 struct i915_wa_ctx_bb *wa_bb[] = { 1690 &wa_ctx->indirect_ctx, &wa_ctx->per_ctx 1691 }; 1692 wa_bb_func_t wa_bb_fn[ARRAY_SIZE(wa_bb)]; 1693 struct i915_gem_ww_ctx ww; 1694 void *batch, *batch_ptr; 1695 unsigned int i; 1696 int err; 1697 1698 if (!(engine->flags & I915_ENGINE_HAS_RCS_REG_STATE)) 1699 return; 1700 1701 switch (GRAPHICS_VER(engine->i915)) { 1702 case 12: 1703 case 11: 1704 return; 1705 case 9: 1706 wa_bb_fn[0] = gen9_init_indirectctx_bb; 1707 wa_bb_fn[1] = NULL; 1708 break; 1709 case 8: 1710 wa_bb_fn[0] = gen8_init_indirectctx_bb; 1711 wa_bb_fn[1] = NULL; 1712 break; 1713 default: 1714 MISSING_CASE(GRAPHICS_VER(engine->i915)); 1715 return; 1716 } 1717 1718 err = lrc_create_wa_ctx(engine); 1719 if (err) { 1720 /* 1721 * We continue even if we fail to initialize WA batch 1722 * because we only expect rare glitches but nothing 1723 * critical to prevent us from using GPU 1724 */ 1725 drm_err(&engine->i915->drm, 1726 "Ignoring context switch w/a allocation error:%d\n", 1727 err); 1728 return; 1729 } 1730 1731 if (!engine->wa_ctx.vma) 1732 return; 1733 1734 i915_gem_ww_ctx_init(&ww, true); 1735 retry: 1736 err = i915_gem_object_lock(wa_ctx->vma->obj, &ww); 1737 if (!err) 1738 err = i915_ggtt_pin(wa_ctx->vma, &ww, 0, PIN_HIGH); 1739 if (err) 1740 goto err; 1741 1742 batch = i915_gem_object_pin_map(wa_ctx->vma->obj, I915_MAP_WB); 1743 if (IS_ERR(batch)) { 1744 err = PTR_ERR(batch); 1745 goto err_unpin; 1746 } 1747 1748 /* 1749 * Emit the two workaround batch buffers, recording the offset from the 1750 * start of the workaround batch buffer object for each and their 1751 * respective sizes. 1752 */ 1753 batch_ptr = batch; 1754 for (i = 0; i < ARRAY_SIZE(wa_bb_fn); i++) { 1755 wa_bb[i]->offset = batch_ptr - batch; 1756 if (GEM_DEBUG_WARN_ON(!IS_ALIGNED(wa_bb[i]->offset, 1757 CACHELINE_BYTES))) { 1758 err = -EINVAL; 1759 break; 1760 } 1761 if (wa_bb_fn[i]) 1762 batch_ptr = wa_bb_fn[i](engine, batch_ptr); 1763 wa_bb[i]->size = batch_ptr - (batch + wa_bb[i]->offset); 1764 } 1765 GEM_BUG_ON(batch_ptr - batch > CTX_WA_BB_SIZE); 1766 1767 __i915_gem_object_flush_map(wa_ctx->vma->obj, 0, batch_ptr - batch); 1768 __i915_gem_object_release_map(wa_ctx->vma->obj); 1769 1770 /* Verify that we can handle failure to setup the wa_ctx */ 1771 if (!err) 1772 err = i915_inject_probe_error(engine->i915, -ENODEV); 1773 1774 err_unpin: 1775 if (err) 1776 i915_vma_unpin(wa_ctx->vma); 1777 err: 1778 if (err == -EDEADLK) { 1779 err = i915_gem_ww_ctx_backoff(&ww); 1780 if (!err) 1781 goto retry; 1782 } 1783 i915_gem_ww_ctx_fini(&ww); 1784 1785 if (err) { 1786 i915_vma_put(engine->wa_ctx.vma); 1787 1788 /* Clear all flags to prevent further use */ 1789 memset(wa_ctx, 0, sizeof(*wa_ctx)); 1790 } 1791 } 1792 1793 static void st_runtime_underflow(struct intel_context_stats *stats, s32 dt) 1794 { 1795 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 1796 stats->runtime.num_underflow++; 1797 stats->runtime.max_underflow = 1798 max_t(u32, stats->runtime.max_underflow, -dt); 1799 #endif 1800 } 1801 1802 static u32 lrc_get_runtime(const struct intel_context *ce) 1803 { 1804 /* 1805 * We can use either ppHWSP[16] which is recorded before the context 1806 * switch (and so excludes the cost of context switches) or use the 1807 * value from the context image itself, which is saved/restored earlier 1808 * and so includes the cost of the save. 1809 */ 1810 return READ_ONCE(ce->lrc_reg_state[CTX_TIMESTAMP]); 1811 } 1812 1813 void lrc_update_runtime(struct intel_context *ce) 1814 { 1815 struct intel_context_stats *stats = &ce->stats; 1816 u32 old; 1817 s32 dt; 1818 1819 old = stats->runtime.last; 1820 stats->runtime.last = lrc_get_runtime(ce); 1821 dt = stats->runtime.last - old; 1822 if (!dt) 1823 return; 1824 1825 if (unlikely(dt < 0)) { 1826 CE_TRACE(ce, "runtime underflow: last=%u, new=%u, delta=%d\n", 1827 old, stats->runtime.last, dt); 1828 st_runtime_underflow(stats, dt); 1829 return; 1830 } 1831 1832 ewma_runtime_add(&stats->runtime.avg, dt); 1833 stats->runtime.total += dt; 1834 } 1835 1836 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 1837 #include "selftest_lrc.c" 1838 #endif 1839