drivers/gpu/drm/i915/gt/intel_lrc.c

   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  */
  47 static 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
 106 static 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
 141 static 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
 225 static 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
 257 static 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
 291 static 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
 328 static 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
 412 static 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
 453 static 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
 549 static 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
 590 static 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
 633 static 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
 682 static 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
 720 static 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
 734 static 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
 749 static 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
 763 static 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
 773 static 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
 784 static 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
 795 static 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
 814 static u32
 815 lrc_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
 831 static void
 832 lrc_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
 848 static 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
 872 static 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
 893 static 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
 909 static 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
 917 static 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
 928 static 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
 957 void 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
 964 void 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
 970 static void
 971 set_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
 981 static void
 982 check_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
 995 static u32 context_wa_bb_offset(const struct intel_context *ce)
 996 {
 997         return PAGE_SIZE * ce->wa_bb_page;
 998 }
 999
1000 static 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
1013 void 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                 shmem_read(engine->default_state, 0,
1023                            state, engine->context_size);
1024                 __set_bit(CONTEXT_VALID_BIT, &ce->flags);
1025                 inhibit = false;
1026         }
1027
1028         /* Clear the ppHWSP (inc. per-context counters) */
1029         memset(state, 0, PAGE_SIZE);
1030
1031         /* Clear the indirect wa and storage */
1032         if (ce->wa_bb_page)
1033                 memset(state + context_wa_bb_offset(ce), 0, PAGE_SIZE);
1034
1035         /*
1036          * The second page of the context object contains some registers which
1037          * must be set up prior to the first execution.
1038          */
1039         __lrc_init_regs(state + LRC_STATE_OFFSET, ce, engine, inhibit);
1040 }
1041
1042 u32 lrc_indirect_bb(const struct intel_context *ce)
1043 {
1044         return i915_ggtt_offset(ce->state) + context_wa_bb_offset(ce);
1045 }
1046
1047 static u32 *setup_predicate_disable_wa(const struct intel_context *ce, u32 *cs)
1048 {
1049         /* If predication is active, this will be noop'ed */
1050         *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT | (4 - 2);
1051         *cs++ = lrc_indirect_bb(ce) + DG2_PREDICATE_RESULT_WA;
1052         *cs++ = 0;
1053         *cs++ = 0; /* No predication */
1054
1055         /* predicated end, only terminates if SET_PREDICATE_RESULT:0 is clear */
1056         *cs++ = MI_BATCH_BUFFER_END | BIT(15);
1057         *cs++ = MI_SET_PREDICATE | MI_SET_PREDICATE_DISABLE;
1058
1059         /* Instructions are no longer predicated (disabled), we can proceed */
1060         *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT | (4 - 2);
1061         *cs++ = lrc_indirect_bb(ce) + DG2_PREDICATE_RESULT_WA;
1062         *cs++ = 0;
1063         *cs++ = 1; /* enable predication before the next BB */
1064
1065         *cs++ = MI_BATCH_BUFFER_END;
1066         GEM_BUG_ON(offset_in_page(cs) > DG2_PREDICATE_RESULT_WA);
1067
1068         return cs;
1069 }
1070
1071 static struct i915_vma *
1072 __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine)
1073 {
1074         struct drm_i915_gem_object *obj;
1075         struct i915_vma *vma;
1076         u32 context_size;
1077
1078         context_size = round_up(engine->context_size, I915_GTT_PAGE_SIZE);
1079
1080         if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
1081                 context_size += I915_GTT_PAGE_SIZE; /* for redzone */
1082
1083         if (GRAPHICS_VER(engine->i915) >= 12) {
1084                 ce->wa_bb_page = context_size / PAGE_SIZE;
1085                 context_size += PAGE_SIZE;
1086         }
1087
1088         if (intel_context_is_parent(ce) && intel_engine_uses_guc(engine)) {
1089                 ce->parallel.guc.parent_page = context_size / PAGE_SIZE;
1090                 context_size += PARENT_SCRATCH_SIZE;
1091         }
1092
1093         obj = i915_gem_object_create_lmem(engine->i915, context_size,
1094                                           I915_BO_ALLOC_PM_VOLATILE);
1095         if (IS_ERR(obj)) {
1096                 obj = i915_gem_object_create_shmem(engine->i915, context_size);
1097                 /*
1098                  * Wa_22016122933: For Media version 13.0, all Media GT shared
1099                  * memory needs to be mapped as WC on CPU side and UC (PAT
1100                  * index 2) on GPU side.
1101                  */
1102                 if (intel_gt_needs_wa_22016122933(engine->gt))
1103                         i915_gem_object_set_cache_coherency(obj, I915_CACHE_NONE);
1104         }
1105         if (IS_ERR(obj))
1106                 return ERR_CAST(obj);
1107
1108         vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL);
1109         if (IS_ERR(vma)) {
1110                 i915_gem_object_put(obj);
1111                 return vma;
1112         }
1113
1114         return vma;
1115 }
1116
1117 static struct intel_timeline *
1118 pinned_timeline(struct intel_context *ce, struct intel_engine_cs *engine)
1119 {
1120         struct intel_timeline *tl = fetch_and_zero(&ce->timeline);
1121
1122         return intel_timeline_create_from_engine(engine, page_unmask_bits(tl));
1123 }
1124
1125 int lrc_alloc(struct intel_context *ce, struct intel_engine_cs *engine)
1126 {
1127         struct intel_ring *ring;
1128         struct i915_vma *vma;
1129         int err;
1130
1131         GEM_BUG_ON(ce->state);
1132
1133         vma = __lrc_alloc_state(ce, engine);
1134         if (IS_ERR(vma))
1135                 return PTR_ERR(vma);
1136
1137         ring = intel_engine_create_ring(engine, ce->ring_size);
1138         if (IS_ERR(ring)) {
1139                 err = PTR_ERR(ring);
1140                 goto err_vma;
1141         }
1142
1143         if (!page_mask_bits(ce->timeline)) {
1144                 struct intel_timeline *tl;
1145
1146                 /*
1147                  * Use the static global HWSP for the kernel context, and
1148                  * a dynamically allocated cacheline for everyone else.
1149                  */
1150                 if (unlikely(ce->timeline))
1151                         tl = pinned_timeline(ce, engine);
1152                 else
1153                         tl = intel_timeline_create(engine->gt);
1154                 if (IS_ERR(tl)) {
1155                         err = PTR_ERR(tl);
1156                         goto err_ring;
1157                 }
1158
1159                 ce->timeline = tl;
1160         }
1161
1162         ce->ring = ring;
1163         ce->state = vma;
1164
1165         return 0;
1166
1167 err_ring:
1168         intel_ring_put(ring);
1169 err_vma:
1170         i915_vma_put(vma);
1171         return err;
1172 }
1173
1174 void lrc_reset(struct intel_context *ce)
1175 {
1176         GEM_BUG_ON(!intel_context_is_pinned(ce));
1177
1178         intel_ring_reset(ce->ring, ce->ring->emit);
1179
1180         /* Scrub away the garbage */
1181         lrc_init_regs(ce, ce->engine, true);
1182         ce->lrc.lrca = lrc_update_regs(ce, ce->engine, ce->ring->tail);
1183 }
1184
1185 int
1186 lrc_pre_pin(struct intel_context *ce,
1187             struct intel_engine_cs *engine,
1188             struct i915_gem_ww_ctx *ww,
1189             void **vaddr)
1190 {
1191         GEM_BUG_ON(!ce->state);
1192         GEM_BUG_ON(!i915_vma_is_pinned(ce->state));
1193
1194         *vaddr = i915_gem_object_pin_map(ce->state->obj,
1195                                          intel_gt_coherent_map_type(ce->engine->gt,
1196                                                                     ce->state->obj,
1197                                                                     false) |
1198                                          I915_MAP_OVERRIDE);
1199
1200         return PTR_ERR_OR_ZERO(*vaddr);
1201 }
1202
1203 int
1204 lrc_pin(struct intel_context *ce,
1205         struct intel_engine_cs *engine,
1206         void *vaddr)
1207 {
1208         ce->lrc_reg_state = vaddr + LRC_STATE_OFFSET;
1209
1210         if (!__test_and_set_bit(CONTEXT_INIT_BIT, &ce->flags))
1211                 lrc_init_state(ce, engine, vaddr);
1212
1213         ce->lrc.lrca = lrc_update_regs(ce, engine, ce->ring->tail);
1214         return 0;
1215 }
1216
1217 void lrc_unpin(struct intel_context *ce)
1218 {
1219         if (unlikely(ce->parallel.last_rq)) {
1220                 i915_request_put(ce->parallel.last_rq);
1221                 ce->parallel.last_rq = NULL;
1222         }
1223         check_redzone((void *)ce->lrc_reg_state - LRC_STATE_OFFSET,
1224                       ce->engine);
1225 }
1226
1227 void lrc_post_unpin(struct intel_context *ce)
1228 {
1229         i915_gem_object_unpin_map(ce->state->obj);
1230 }
1231
1232 void lrc_fini(struct intel_context *ce)
1233 {
1234         if (!ce->state)
1235                 return;
1236
1237         intel_ring_put(fetch_and_zero(&ce->ring));
1238         i915_vma_put(fetch_and_zero(&ce->state));
1239 }
1240
1241 void lrc_destroy(struct kref *kref)
1242 {
1243         struct intel_context *ce = container_of(kref, typeof(*ce), ref);
1244
1245         GEM_BUG_ON(!i915_active_is_idle(&ce->active));
1246         GEM_BUG_ON(intel_context_is_pinned(ce));
1247
1248         lrc_fini(ce);
1249
1250         intel_context_fini(ce);
1251         intel_context_free(ce);
1252 }
1253
1254 static u32 *
1255 gen12_emit_timestamp_wa(const struct intel_context *ce, u32 *cs)
1256 {
1257         *cs++ = MI_LOAD_REGISTER_MEM_GEN8 |
1258                 MI_SRM_LRM_GLOBAL_GTT |
1259                 MI_LRI_LRM_CS_MMIO;
1260         *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0));
1261         *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET +
1262                 CTX_TIMESTAMP * sizeof(u32);
1263         *cs++ = 0;
1264
1265         *cs++ = MI_LOAD_REGISTER_REG |
1266                 MI_LRR_SOURCE_CS_MMIO |
1267                 MI_LRI_LRM_CS_MMIO;
1268         *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0));
1269         *cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(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         return cs;
1278 }
1279
1280 static u32 *
1281 gen12_emit_restore_scratch(const struct intel_context *ce, u32 *cs)
1282 {
1283         GEM_BUG_ON(lrc_ring_gpr0(ce->engine) == -1);
1284
1285         *cs++ = MI_LOAD_REGISTER_MEM_GEN8 |
1286                 MI_SRM_LRM_GLOBAL_GTT |
1287                 MI_LRI_LRM_CS_MMIO;
1288         *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0));
1289         *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET +
1290                 (lrc_ring_gpr0(ce->engine) + 1) * sizeof(u32);
1291         *cs++ = 0;
1292
1293         return cs;
1294 }
1295
1296 static u32 *
1297 gen12_emit_cmd_buf_wa(const struct intel_context *ce, u32 *cs)
1298 {
1299         GEM_BUG_ON(lrc_ring_cmd_buf_cctl(ce->engine) == -1);
1300
1301         *cs++ = MI_LOAD_REGISTER_MEM_GEN8 |
1302                 MI_SRM_LRM_GLOBAL_GTT |
1303                 MI_LRI_LRM_CS_MMIO;
1304         *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0));
1305         *cs++ = i915_ggtt_offset(ce->state) + LRC_STATE_OFFSET +
1306                 (lrc_ring_cmd_buf_cctl(ce->engine) + 1) * sizeof(u32);
1307         *cs++ = 0;
1308
1309         *cs++ = MI_LOAD_REGISTER_REG |
1310                 MI_LRR_SOURCE_CS_MMIO |
1311                 MI_LRI_LRM_CS_MMIO;
1312         *cs++ = i915_mmio_reg_offset(GEN8_RING_CS_GPR(0, 0));
1313         *cs++ = i915_mmio_reg_offset(RING_CMD_BUF_CCTL(0));
1314
1315         return cs;
1316 }
1317
1318 /*
1319  * On DG2 during context restore of a preempted context in GPGPU mode,
1320  * RCS restore hang is detected. This is extremely timing dependent.
1321  * To address this below sw wabb is implemented for DG2 A steppings.
1322  */
1323 static u32 *
1324 dg2_emit_rcs_hang_wabb(const struct intel_context *ce, u32 *cs)
1325 {
1326         *cs++ = MI_LOAD_REGISTER_IMM(1);
1327         *cs++ = i915_mmio_reg_offset(GEN12_STATE_ACK_DEBUG(ce->engine->mmio_base));
1328         *cs++ = 0x21;
1329
1330         *cs++ = MI_LOAD_REGISTER_REG;
1331         *cs++ = i915_mmio_reg_offset(RING_NOPID(ce->engine->mmio_base));
1332         *cs++ = i915_mmio_reg_offset(XEHP_CULLBIT1);
1333
1334         *cs++ = MI_LOAD_REGISTER_REG;
1335         *cs++ = i915_mmio_reg_offset(RING_NOPID(ce->engine->mmio_base));
1336         *cs++ = i915_mmio_reg_offset(XEHP_CULLBIT2);
1337
1338         return cs;
1339 }
1340
1341 /*
1342  * The bspec's tuning guide asks us to program a vertical watermark value of
1343  * 0x3FF.  However this register is not saved/restored properly by the
1344  * hardware, so we're required to apply the desired value via INDIRECT_CTX
1345  * batch buffer to ensure the value takes effect properly.  All other bits
1346  * in this register should remain at 0 (the hardware default).
1347  */
1348 static u32 *
1349 dg2_emit_draw_watermark_setting(u32 *cs)
1350 {
1351         *cs++ = MI_LOAD_REGISTER_IMM(1);
1352         *cs++ = i915_mmio_reg_offset(DRAW_WATERMARK);
1353         *cs++ = REG_FIELD_PREP(VERT_WM_VAL, 0x3FF);
1354
1355         return cs;
1356 }
1357
1358 static u32 *
1359 gen12_emit_indirect_ctx_rcs(const struct intel_context *ce, u32 *cs)
1360 {
1361         cs = gen12_emit_timestamp_wa(ce, cs);
1362         cs = gen12_emit_cmd_buf_wa(ce, cs);
1363         cs = gen12_emit_restore_scratch(ce, cs);
1364
1365         /* Wa_22011450934:dg2 */
1366         if (IS_DG2_GRAPHICS_STEP(ce->engine->i915, G10, STEP_A0, STEP_B0) ||
1367             IS_DG2_GRAPHICS_STEP(ce->engine->i915, G11, STEP_A0, STEP_B0))
1368                 cs = dg2_emit_rcs_hang_wabb(ce, cs);
1369
1370         /* Wa_16013000631:dg2 */
1371         if (IS_DG2_GRAPHICS_STEP(ce->engine->i915, G10, STEP_B0, STEP_C0) ||
1372             IS_DG2_G11(ce->engine->i915))
1373                 cs = gen8_emit_pipe_control(cs, PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE, 0);
1374
1375         cs = gen12_emit_aux_table_inv(ce->engine, cs);
1376
1377         /* Wa_16014892111 */
1378         if (IS_MTL_GRAPHICS_STEP(ce->engine->i915, M, STEP_A0, STEP_B0) ||
1379             IS_MTL_GRAPHICS_STEP(ce->engine->i915, P, STEP_A0, STEP_B0) ||
1380             IS_DG2(ce->engine->i915))
1381                 cs = dg2_emit_draw_watermark_setting(cs);
1382
1383         return cs;
1384 }
1385
1386 static u32 *
1387 gen12_emit_indirect_ctx_xcs(const struct intel_context *ce, u32 *cs)
1388 {
1389         cs = gen12_emit_timestamp_wa(ce, cs);
1390         cs = gen12_emit_restore_scratch(ce, cs);
1391
1392         /* Wa_16013000631:dg2 */
1393         if (IS_DG2_GRAPHICS_STEP(ce->engine->i915, G10, STEP_B0, STEP_C0) ||
1394             IS_DG2_G11(ce->engine->i915))
1395                 if (ce->engine->class == COMPUTE_CLASS)
1396                         cs = gen8_emit_pipe_control(cs,
1397                                                     PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE,
1398                                                     0);
1399
1400         return gen12_emit_aux_table_inv(ce->engine, cs);
1401 }
1402
1403 static void
1404 setup_indirect_ctx_bb(const struct intel_context *ce,
1405                       const struct intel_engine_cs *engine,
1406                       u32 *(*emit)(const struct intel_context *, u32 *))
1407 {
1408         u32 * const start = context_indirect_bb(ce);
1409         u32 *cs;
1410
1411         cs = emit(ce, start);
1412         GEM_BUG_ON(cs - start > I915_GTT_PAGE_SIZE / sizeof(*cs));
1413         while ((unsigned long)cs % CACHELINE_BYTES)
1414                 *cs++ = MI_NOOP;
1415
1416         GEM_BUG_ON(cs - start > DG2_PREDICATE_RESULT_BB / sizeof(*start));
1417         setup_predicate_disable_wa(ce, start + DG2_PREDICATE_RESULT_BB / sizeof(*start));
1418
1419         lrc_setup_indirect_ctx(ce->lrc_reg_state, engine,
1420                                lrc_indirect_bb(ce),
1421                                (cs - start) * sizeof(*cs));
1422 }
1423
1424 /*
1425  * The context descriptor encodes various attributes of a context,
1426  * including its GTT address and some flags. Because it's fairly
1427  * expensive to calculate, we'll just do it once and cache the result,
1428  * which remains valid until the context is unpinned.
1429  *
1430  * This is what a descriptor looks like, from LSB to MSB::
1431  *
1432  *      bits  0-11:    flags, GEN8_CTX_* (cached in ctx->desc_template)
1433  *      bits 12-31:    LRCA, GTT address of (the HWSP of) this context
1434  *      bits 32-52:    ctx ID, a globally unique tag (highest bit used by GuC)
1435  *      bits 53-54:    mbz, reserved for use by hardware
1436  *      bits 55-63:    group ID, currently unused and set to 0
1437  *
1438  * Starting from Gen11, the upper dword of the descriptor has a new format:
1439  *
1440  *      bits 32-36:    reserved
1441  *      bits 37-47:    SW context ID
1442  *      bits 48:53:    engine instance
1443  *      bit 54:        mbz, reserved for use by hardware
1444  *      bits 55-60:    SW counter
1445  *      bits 61-63:    engine class
1446  *
1447  * On Xe_HP, the upper dword of the descriptor has a new format:
1448  *
1449  *      bits 32-37:    virtual function number
1450  *      bit 38:        mbz, reserved for use by hardware
1451  *      bits 39-54:    SW context ID
1452  *      bits 55-57:    reserved
1453  *      bits 58-63:    SW counter
1454  *
1455  * engine info, SW context ID and SW counter need to form a unique number
1456  * (Context ID) per lrc.
1457  */
1458 static u32 lrc_descriptor(const struct intel_context *ce)
1459 {
1460         u32 desc;
1461
1462         desc = INTEL_LEGACY_32B_CONTEXT;
1463         if (i915_vm_is_4lvl(ce->vm))
1464                 desc = INTEL_LEGACY_64B_CONTEXT;
1465         desc <<= GEN8_CTX_ADDRESSING_MODE_SHIFT;
1466
1467         desc |= GEN8_CTX_VALID | GEN8_CTX_PRIVILEGE;
1468         if (GRAPHICS_VER(ce->vm->i915) == 8)
1469                 desc |= GEN8_CTX_L3LLC_COHERENT;
1470
1471         return i915_ggtt_offset(ce->state) | desc;
1472 }
1473
1474 u32 lrc_update_regs(const struct intel_context *ce,
1475                     const struct intel_engine_cs *engine,
1476                     u32 head)
1477 {
1478         struct intel_ring *ring = ce->ring;
1479         u32 *regs = ce->lrc_reg_state;
1480
1481         GEM_BUG_ON(!intel_ring_offset_valid(ring, head));
1482         GEM_BUG_ON(!intel_ring_offset_valid(ring, ring->tail));
1483
1484         regs[CTX_RING_START] = i915_ggtt_offset(ring->vma);
1485         regs[CTX_RING_HEAD] = head;
1486         regs[CTX_RING_TAIL] = ring->tail;
1487         regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID;
1488
1489         /* RPCS */
1490         if (engine->class == RENDER_CLASS) {
1491                 regs[CTX_R_PWR_CLK_STATE] =
1492                         intel_sseu_make_rpcs(engine->gt, &ce->sseu);
1493
1494                 i915_oa_init_reg_state(ce, engine);
1495         }
1496
1497         if (ce->wa_bb_page) {
1498                 u32 *(*fn)(const struct intel_context *ce, u32 *cs);
1499
1500                 fn = gen12_emit_indirect_ctx_xcs;
1501                 if (ce->engine->class == RENDER_CLASS)
1502                         fn = gen12_emit_indirect_ctx_rcs;
1503
1504                 /* Mutually exclusive wrt to global indirect bb */
1505                 GEM_BUG_ON(engine->wa_ctx.indirect_ctx.size);
1506                 setup_indirect_ctx_bb(ce, engine, fn);
1507         }
1508
1509         return lrc_descriptor(ce) | CTX_DESC_FORCE_RESTORE;
1510 }
1511
1512 void lrc_update_offsets(struct intel_context *ce,
1513                         struct intel_engine_cs *engine)
1514 {
1515         set_offsets(ce->lrc_reg_state, reg_offsets(engine), engine, false);
1516 }
1517
1518 void lrc_check_regs(const struct intel_context *ce,
1519                     const struct intel_engine_cs *engine,
1520                     const char *when)
1521 {
1522         const struct intel_ring *ring = ce->ring;
1523         u32 *regs = ce->lrc_reg_state;
1524         bool valid = true;
1525         int x;
1526
1527         if (regs[CTX_RING_START] != i915_ggtt_offset(ring->vma)) {
1528                 pr_err("%s: context submitted with incorrect RING_START [%08x], expected %08x\n",
1529                        engine->name,
1530                        regs[CTX_RING_START],
1531                        i915_ggtt_offset(ring->vma));
1532                 regs[CTX_RING_START] = i915_ggtt_offset(ring->vma);
1533                 valid = false;
1534         }
1535
1536         if ((regs[CTX_RING_CTL] & ~(RING_WAIT | RING_WAIT_SEMAPHORE)) !=
1537             (RING_CTL_SIZE(ring->size) | RING_VALID)) {
1538                 pr_err("%s: context submitted with incorrect RING_CTL [%08x], expected %08x\n",
1539                        engine->name,
1540                        regs[CTX_RING_CTL],
1541                        (u32)(RING_CTL_SIZE(ring->size) | RING_VALID));
1542                 regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID;
1543                 valid = false;
1544         }
1545
1546         x = lrc_ring_mi_mode(engine);
1547         if (x != -1 && regs[x + 1] & (regs[x + 1] >> 16) & STOP_RING) {
1548                 pr_err("%s: context submitted with STOP_RING [%08x] in RING_MI_MODE\n",
1549                        engine->name, regs[x + 1]);
1550                 regs[x + 1] &= ~STOP_RING;
1551                 regs[x + 1] |= STOP_RING << 16;
1552                 valid = false;
1553         }
1554
1555         WARN_ONCE(!valid, "Invalid lrc state found %s submission\n", when);
1556 }
1557
1558 /*
1559  * In this WA we need to set GEN8_L3SQCREG4[21:21] and reset it after
1560  * PIPE_CONTROL instruction. This is required for the flush to happen correctly
1561  * but there is a slight complication as this is applied in WA batch where the
1562  * values are only initialized once so we cannot take register value at the
1563  * beginning and reuse it further; hence we save its value to memory, upload a
1564  * constant value with bit21 set and then we restore it back with the saved value.
1565  * To simplify the WA, a constant value is formed by using the default value
1566  * of this register. This shouldn't be a problem because we are only modifying
1567  * it for a short period and this batch in non-premptible. We can ofcourse
1568  * use additional instructions that read the actual value of the register
1569  * at that time and set our bit of interest but it makes the WA complicated.
1570  *
1571  * This WA is also required for Gen9 so extracting as a function avoids
1572  * code duplication.
1573  */
1574 static u32 *
1575 gen8_emit_flush_coherentl3_wa(struct intel_engine_cs *engine, u32 *batch)
1576 {
1577         /* NB no one else is allowed to scribble over scratch + 256! */
1578         *batch++ = MI_STORE_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT;
1579         *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4);
1580         *batch++ = intel_gt_scratch_offset(engine->gt,
1581                                            INTEL_GT_SCRATCH_FIELD_COHERENTL3_WA);
1582         *batch++ = 0;
1583
1584         *batch++ = MI_LOAD_REGISTER_IMM(1);
1585         *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4);
1586         *batch++ = 0x40400000 | GEN8_LQSC_FLUSH_COHERENT_LINES;
1587
1588         batch = gen8_emit_pipe_control(batch,
1589                                        PIPE_CONTROL_CS_STALL |
1590                                        PIPE_CONTROL_DC_FLUSH_ENABLE,
1591                                        0);
1592
1593         *batch++ = MI_LOAD_REGISTER_MEM_GEN8 | MI_SRM_LRM_GLOBAL_GTT;
1594         *batch++ = i915_mmio_reg_offset(GEN8_L3SQCREG4);
1595         *batch++ = intel_gt_scratch_offset(engine->gt,
1596                                            INTEL_GT_SCRATCH_FIELD_COHERENTL3_WA);
1597         *batch++ = 0;
1598
1599         return batch;
1600 }
1601
1602 /*
1603  * Typically we only have one indirect_ctx and per_ctx batch buffer which are
1604  * initialized at the beginning and shared across all contexts but this field
1605  * helps us to have multiple batches at different offsets and select them based
1606  * on a criteria. At the moment this batch always start at the beginning of the page
1607  * and at this point we don't have multiple wa_ctx batch buffers.
1608  *
1609  * The number of WA applied are not known at the beginning; we use this field
1610  * to return the no of DWORDS written.
1611  *
1612  * It is to be noted that this batch does not contain MI_BATCH_BUFFER_END
1613  * so it adds NOOPs as padding to make it cacheline aligned.
1614  * MI_BATCH_BUFFER_END will be added to perctx batch and both of them together
1615  * makes a complete batch buffer.
1616  */
1617 static u32 *gen8_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch)
1618 {
1619         /* WaDisableCtxRestoreArbitration:bdw,chv */
1620         *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
1621
1622         /* WaFlushCoherentL3CacheLinesAtContextSwitch:bdw */
1623         if (IS_BROADWELL(engine->i915))
1624                 batch = gen8_emit_flush_coherentl3_wa(engine, batch);
1625
1626         /* WaClearSlmSpaceAtContextSwitch:bdw,chv */
1627         /* Actual scratch location is at 128 bytes offset */
1628         batch = gen8_emit_pipe_control(batch,
1629                                        PIPE_CONTROL_FLUSH_L3 |
1630                                        PIPE_CONTROL_STORE_DATA_INDEX |
1631                                        PIPE_CONTROL_CS_STALL |
1632                                        PIPE_CONTROL_QW_WRITE,
1633                                        LRC_PPHWSP_SCRATCH_ADDR);
1634
1635         *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
1636
1637         /* Pad to end of cacheline */
1638         while ((unsigned long)batch % CACHELINE_BYTES)
1639                 *batch++ = MI_NOOP;
1640
1641         /*
1642          * MI_BATCH_BUFFER_END is not required in Indirect ctx BB because
1643          * execution depends on the length specified in terms of cache lines
1644          * in the register CTX_RCS_INDIRECT_CTX
1645          */
1646
1647         return batch;
1648 }
1649
1650 struct lri {
1651         i915_reg_t reg;
1652         u32 value;
1653 };
1654
1655 static u32 *emit_lri(u32 *batch, const struct lri *lri, unsigned int count)
1656 {
1657         GEM_BUG_ON(!count || count > 63);
1658
1659         *batch++ = MI_LOAD_REGISTER_IMM(count);
1660         do {
1661                 *batch++ = i915_mmio_reg_offset(lri->reg);
1662                 *batch++ = lri->value;
1663         } while (lri++, --count);
1664         *batch++ = MI_NOOP;
1665
1666         return batch;
1667 }
1668
1669 static u32 *gen9_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch)
1670 {
1671         static const struct lri lri[] = {
1672                 /* WaDisableGatherAtSetShaderCommonSlice:skl,bxt,kbl,glk */
1673                 {
1674                         COMMON_SLICE_CHICKEN2,
1675                         __MASKED_FIELD(GEN9_DISABLE_GATHER_AT_SET_SHADER_COMMON_SLICE,
1676                                        0),
1677                 },
1678
1679                 /* BSpec: 11391 */
1680                 {
1681                         FF_SLICE_CHICKEN,
1682                         __MASKED_FIELD(FF_SLICE_CHICKEN_CL_PROVOKING_VERTEX_FIX,
1683                                        FF_SLICE_CHICKEN_CL_PROVOKING_VERTEX_FIX),
1684                 },
1685
1686                 /* BSpec: 11299 */
1687                 {
1688                         _3D_CHICKEN3,
1689                         __MASKED_FIELD(_3D_CHICKEN_SF_PROVOKING_VERTEX_FIX,
1690                                        _3D_CHICKEN_SF_PROVOKING_VERTEX_FIX),
1691                 }
1692         };
1693
1694         *batch++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
1695
1696         /* WaFlushCoherentL3CacheLinesAtContextSwitch:skl,bxt,glk */
1697         batch = gen8_emit_flush_coherentl3_wa(engine, batch);
1698
1699         /* WaClearSlmSpaceAtContextSwitch:skl,bxt,kbl,glk,cfl */
1700         batch = gen8_emit_pipe_control(batch,
1701                                        PIPE_CONTROL_FLUSH_L3 |
1702                                        PIPE_CONTROL_STORE_DATA_INDEX |
1703                                        PIPE_CONTROL_CS_STALL |
1704                                        PIPE_CONTROL_QW_WRITE,
1705                                        LRC_PPHWSP_SCRATCH_ADDR);
1706
1707         batch = emit_lri(batch, lri, ARRAY_SIZE(lri));
1708
1709         /* WaMediaPoolStateCmdInWABB:bxt,glk */
1710         if (HAS_POOLED_EU(engine->i915)) {
1711                 /*
1712                  * EU pool configuration is setup along with golden context
1713                  * during context initialization. This value depends on
1714                  * device type (2x6 or 3x6) and needs to be updated based
1715                  * on which subslice is disabled especially for 2x6
1716                  * devices, however it is safe to load default
1717                  * configuration of 3x6 device instead of masking off
1718                  * corresponding bits because HW ignores bits of a disabled
1719                  * subslice and drops down to appropriate config. Please
1720                  * see render_state_setup() in i915_gem_render_state.c for
1721                  * possible configurations, to avoid duplication they are
1722                  * not shown here again.
1723                  */
1724                 *batch++ = GEN9_MEDIA_POOL_STATE;
1725                 *batch++ = GEN9_MEDIA_POOL_ENABLE;
1726                 *batch++ = 0x00777000;
1727                 *batch++ = 0;
1728                 *batch++ = 0;
1729                 *batch++ = 0;
1730         }
1731
1732         *batch++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
1733
1734         /* Pad to end of cacheline */
1735         while ((unsigned long)batch % CACHELINE_BYTES)
1736                 *batch++ = MI_NOOP;
1737
1738         return batch;
1739 }
1740
1741 #define CTX_WA_BB_SIZE (PAGE_SIZE)
1742
1743 static int lrc_create_wa_ctx(struct intel_engine_cs *engine)
1744 {
1745         struct drm_i915_gem_object *obj;
1746         struct i915_vma *vma;
1747         int err;
1748
1749         obj = i915_gem_object_create_shmem(engine->i915, CTX_WA_BB_SIZE);
1750         if (IS_ERR(obj))
1751                 return PTR_ERR(obj);
1752
1753         vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL);
1754         if (IS_ERR(vma)) {
1755                 err = PTR_ERR(vma);
1756                 goto err;
1757         }
1758
1759         engine->wa_ctx.vma = vma;
1760         return 0;
1761
1762 err:
1763         i915_gem_object_put(obj);
1764         return err;
1765 }
1766
1767 void lrc_fini_wa_ctx(struct intel_engine_cs *engine)
1768 {
1769         i915_vma_unpin_and_release(&engine->wa_ctx.vma, 0);
1770 }
1771
1772 typedef u32 *(*wa_bb_func_t)(struct intel_engine_cs *engine, u32 *batch);
1773
1774 void lrc_init_wa_ctx(struct intel_engine_cs *engine)
1775 {
1776         struct i915_ctx_workarounds *wa_ctx = &engine->wa_ctx;
1777         struct i915_wa_ctx_bb *wa_bb[] = {
1778                 &wa_ctx->indirect_ctx, &wa_ctx->per_ctx
1779         };
1780         wa_bb_func_t wa_bb_fn[ARRAY_SIZE(wa_bb)];
1781         struct i915_gem_ww_ctx ww;
1782         void *batch, *batch_ptr;
1783         unsigned int i;
1784         int err;
1785
1786         if (GRAPHICS_VER(engine->i915) >= 11 ||
1787             !(engine->flags & I915_ENGINE_HAS_RCS_REG_STATE))
1788                 return;
1789
1790         if (GRAPHICS_VER(engine->i915) == 9) {
1791                 wa_bb_fn[0] = gen9_init_indirectctx_bb;
1792                 wa_bb_fn[1] = NULL;
1793         } else if (GRAPHICS_VER(engine->i915) == 8) {
1794                 wa_bb_fn[0] = gen8_init_indirectctx_bb;
1795                 wa_bb_fn[1] = NULL;
1796         }
1797
1798         err = lrc_create_wa_ctx(engine);
1799         if (err) {
1800                 /*
1801                  * We continue even if we fail to initialize WA batch
1802                  * because we only expect rare glitches but nothing
1803                  * critical to prevent us from using GPU
1804                  */
1805                 drm_err(&engine->i915->drm,
1806                         "Ignoring context switch w/a allocation error:%d\n",
1807                         err);
1808                 return;
1809         }
1810
1811         if (!engine->wa_ctx.vma)
1812                 return;
1813
1814         i915_gem_ww_ctx_init(&ww, true);
1815 retry:
1816         err = i915_gem_object_lock(wa_ctx->vma->obj, &ww);
1817         if (!err)
1818                 err = i915_ggtt_pin(wa_ctx->vma, &ww, 0, PIN_HIGH);
1819         if (err)
1820                 goto err;
1821
1822         batch = i915_gem_object_pin_map(wa_ctx->vma->obj, I915_MAP_WB);
1823         if (IS_ERR(batch)) {
1824                 err = PTR_ERR(batch);
1825                 goto err_unpin;
1826         }
1827
1828         /*
1829          * Emit the two workaround batch buffers, recording the offset from the
1830          * start of the workaround batch buffer object for each and their
1831          * respective sizes.
1832          */
1833         batch_ptr = batch;
1834         for (i = 0; i < ARRAY_SIZE(wa_bb_fn); i++) {
1835                 wa_bb[i]->offset = batch_ptr - batch;
1836                 if (GEM_DEBUG_WARN_ON(!IS_ALIGNED(wa_bb[i]->offset,
1837                                                   CACHELINE_BYTES))) {
1838                         err = -EINVAL;
1839                         break;
1840                 }
1841                 if (wa_bb_fn[i])
1842                         batch_ptr = wa_bb_fn[i](engine, batch_ptr);
1843                 wa_bb[i]->size = batch_ptr - (batch + wa_bb[i]->offset);
1844         }
1845         GEM_BUG_ON(batch_ptr - batch > CTX_WA_BB_SIZE);
1846
1847         __i915_gem_object_flush_map(wa_ctx->vma->obj, 0, batch_ptr - batch);
1848         __i915_gem_object_release_map(wa_ctx->vma->obj);
1849
1850         /* Verify that we can handle failure to setup the wa_ctx */
1851         if (!err)
1852                 err = i915_inject_probe_error(engine->i915, -ENODEV);
1853
1854 err_unpin:
1855         if (err)
1856                 i915_vma_unpin(wa_ctx->vma);
1857 err:
1858         if (err == -EDEADLK) {
1859                 err = i915_gem_ww_ctx_backoff(&ww);
1860                 if (!err)
1861                         goto retry;
1862         }
1863         i915_gem_ww_ctx_fini(&ww);
1864
1865         if (err) {
1866                 i915_vma_put(engine->wa_ctx.vma);
1867
1868                 /* Clear all flags to prevent further use */
1869                 memset(wa_ctx, 0, sizeof(*wa_ctx));
1870         }
1871 }
1872
1873 static void st_runtime_underflow(struct intel_context_stats *stats, s32 dt)
1874 {
1875 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
1876         stats->runtime.num_underflow++;
1877         stats->runtime.max_underflow =
1878                 max_t(u32, stats->runtime.max_underflow, -dt);
1879 #endif
1880 }
1881
1882 static u32 lrc_get_runtime(const struct intel_context *ce)
1883 {
1884         /*
1885          * We can use either ppHWSP[16] which is recorded before the context
1886          * switch (and so excludes the cost of context switches) or use the
1887          * value from the context image itself, which is saved/restored earlier
1888          * and so includes the cost of the save.
1889          */
1890         return READ_ONCE(ce->lrc_reg_state[CTX_TIMESTAMP]);
1891 }
1892
1893 void lrc_update_runtime(struct intel_context *ce)
1894 {
1895         struct intel_context_stats *stats = &ce->stats;
1896         u32 old;
1897         s32 dt;
1898
1899         old = stats->runtime.last;
1900         stats->runtime.last = lrc_get_runtime(ce);
1901         dt = stats->runtime.last - old;
1902         if (!dt)
1903                 return;
1904
1905         if (unlikely(dt < 0)) {
1906                 CE_TRACE(ce, "runtime underflow: last=%u, new=%u, delta=%d\n",
1907                          old, stats->runtime.last, dt);
1908                 st_runtime_underflow(stats, dt);
1909                 return;
1910         }
1911
1912         ewma_runtime_add(&stats->runtime.avg, dt);
1913         stats->runtime.total += dt;
1914 }
1915
1916 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
1917 #include "selftest_lrc.c"
1918 #endif