1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2015 Intel Corporation 4 */ 5 6 #include "i915_drv.h" 7 8 #include "intel_engine.h" 9 #include "intel_gt.h" 10 #include "intel_gt_mcr.h" 11 #include "intel_gt_regs.h" 12 #include "intel_mocs.h" 13 #include "intel_ring.h" 14 15 /* structures required */ 16 struct drm_i915_mocs_entry { 17 u32 control_value; 18 u16 l3cc_value; 19 u16 used; 20 }; 21 22 struct drm_i915_mocs_table { 23 unsigned int size; 24 unsigned int n_entries; 25 const struct drm_i915_mocs_entry *table; 26 u8 uc_index; 27 u8 wb_index; /* Only used on HAS_L3_CCS_READ() platforms */ 28 u8 unused_entries_index; 29 }; 30 31 /* Defines for the tables (XXX_MOCS_0 - XXX_MOCS_63) */ 32 #define _LE_CACHEABILITY(value) ((value) << 0) 33 #define _LE_TGT_CACHE(value) ((value) << 2) 34 #define LE_LRUM(value) ((value) << 4) 35 #define LE_AOM(value) ((value) << 6) 36 #define LE_RSC(value) ((value) << 7) 37 #define LE_SCC(value) ((value) << 8) 38 #define LE_PFM(value) ((value) << 11) 39 #define LE_SCF(value) ((value) << 14) 40 #define LE_COS(value) ((value) << 15) 41 #define LE_SSE(value) ((value) << 17) 42 43 /* Defines for the tables (GLOB_MOCS_0 - GLOB_MOCS_16) */ 44 #define _L4_CACHEABILITY(value) ((value) << 2) 45 #define IG_PAT(value) ((value) << 8) 46 47 /* Defines for the tables (LNCFMOCS0 - LNCFMOCS31) - two entries per word */ 48 #define L3_ESC(value) ((value) << 0) 49 #define L3_SCC(value) ((value) << 1) 50 #define _L3_CACHEABILITY(value) ((value) << 4) 51 #define L3_GLBGO(value) ((value) << 6) 52 #define L3_LKUP(value) ((value) << 7) 53 54 /* Helper defines */ 55 #define GEN9_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */ 56 #define PVC_NUM_MOCS_ENTRIES 3 57 #define MTL_NUM_MOCS_ENTRIES 16 58 59 /* (e)LLC caching options */ 60 /* 61 * Note: LE_0_PAGETABLE works only up to Gen11; for newer gens it means 62 * the same as LE_UC 63 */ 64 #define LE_0_PAGETABLE _LE_CACHEABILITY(0) 65 #define LE_1_UC _LE_CACHEABILITY(1) 66 #define LE_2_WT _LE_CACHEABILITY(2) 67 #define LE_3_WB _LE_CACHEABILITY(3) 68 69 /* Target cache */ 70 #define LE_TC_0_PAGETABLE _LE_TGT_CACHE(0) 71 #define LE_TC_1_LLC _LE_TGT_CACHE(1) 72 #define LE_TC_2_LLC_ELLC _LE_TGT_CACHE(2) 73 #define LE_TC_3_LLC_ELLC_ALT _LE_TGT_CACHE(3) 74 75 /* L3 caching options */ 76 #define L3_0_DIRECT _L3_CACHEABILITY(0) 77 #define L3_1_UC _L3_CACHEABILITY(1) 78 #define L3_2_RESERVED _L3_CACHEABILITY(2) 79 #define L3_3_WB _L3_CACHEABILITY(3) 80 81 /* L4 caching options */ 82 #define L4_0_WB _L4_CACHEABILITY(0) 83 #define L4_1_WT _L4_CACHEABILITY(1) 84 #define L4_2_RESERVED _L4_CACHEABILITY(2) 85 #define L4_3_UC _L4_CACHEABILITY(3) 86 87 #define MOCS_ENTRY(__idx, __control_value, __l3cc_value) \ 88 [__idx] = { \ 89 .control_value = __control_value, \ 90 .l3cc_value = __l3cc_value, \ 91 .used = 1, \ 92 } 93 94 /* 95 * MOCS tables 96 * 97 * These are the MOCS tables that are programmed across all the rings. 98 * The control value is programmed to all the rings that support the 99 * MOCS registers. While the l3cc_values are only programmed to the 100 * LNCFCMOCS0 - LNCFCMOCS32 registers. 101 * 102 * These tables are intended to be kept reasonably consistent across 103 * HW platforms, and for ICL+, be identical across OSes. To achieve 104 * that, for Icelake and above, list of entries is published as part 105 * of bspec. 106 * 107 * Entries not part of the following tables are undefined as far as 108 * userspace is concerned and shouldn't be relied upon. For Gen < 12 109 * they will be initialized to PTE. Gen >= 12 don't have a setting for 110 * PTE and those platforms except TGL/RKL will be initialized L3 WB to 111 * catch accidental use of reserved and unused mocs indexes. 112 * 113 * The last few entries are reserved by the hardware. For ICL+ they 114 * should be initialized according to bspec and never used, for older 115 * platforms they should never be written to. 116 * 117 * NOTE1: These tables are part of bspec and defined as part of hardware 118 * interface for ICL+. For older platforms, they are part of kernel 119 * ABI. It is expected that, for specific hardware platform, existing 120 * entries will remain constant and the table will only be updated by 121 * adding new entries, filling unused positions. 122 * 123 * NOTE2: For GEN >= 12 except TGL and RKL, reserved and unspecified MOCS 124 * indices have been set to L3 WB. These reserved entries should never 125 * be used, they may be changed to low performant variants with better 126 * coherency in the future if more entries are needed. 127 * For TGL/RKL, all the unspecified MOCS indexes are mapped to L3 UC. 128 */ 129 #define GEN9_MOCS_ENTRIES \ 130 MOCS_ENTRY(I915_MOCS_UNCACHED, \ 131 LE_1_UC | LE_TC_2_LLC_ELLC, \ 132 L3_1_UC), \ 133 MOCS_ENTRY(I915_MOCS_PTE, \ 134 LE_0_PAGETABLE | LE_TC_0_PAGETABLE | LE_LRUM(3), \ 135 L3_3_WB) 136 137 static const struct drm_i915_mocs_entry skl_mocs_table[] = { 138 GEN9_MOCS_ENTRIES, 139 MOCS_ENTRY(I915_MOCS_CACHED, 140 LE_3_WB | LE_TC_2_LLC_ELLC | LE_LRUM(3), 141 L3_3_WB), 142 143 /* 144 * mocs:63 145 * - used by the L3 for all of its evictions. 146 * Thus it is expected to allow LLC cacheability to enable coherent 147 * flows to be maintained. 148 * - used to force L3 uncachable cycles. 149 * Thus it is expected to make the surface L3 uncacheable. 150 */ 151 MOCS_ENTRY(63, 152 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 153 L3_1_UC) 154 }; 155 156 /* NOTE: the LE_TGT_CACHE is not used on Broxton */ 157 static const struct drm_i915_mocs_entry broxton_mocs_table[] = { 158 GEN9_MOCS_ENTRIES, 159 MOCS_ENTRY(I915_MOCS_CACHED, 160 LE_1_UC | LE_TC_2_LLC_ELLC | LE_LRUM(3), 161 L3_3_WB) 162 }; 163 164 #define GEN11_MOCS_ENTRIES \ 165 /* Entries 0 and 1 are defined per-platform */ \ 166 /* Base - L3 + LLC */ \ 167 MOCS_ENTRY(2, \ 168 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \ 169 L3_3_WB), \ 170 /* Base - Uncached */ \ 171 MOCS_ENTRY(3, \ 172 LE_1_UC | LE_TC_1_LLC, \ 173 L3_1_UC), \ 174 /* Base - L3 */ \ 175 MOCS_ENTRY(4, \ 176 LE_1_UC | LE_TC_1_LLC, \ 177 L3_3_WB), \ 178 /* Base - LLC */ \ 179 MOCS_ENTRY(5, \ 180 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \ 181 L3_1_UC), \ 182 /* Age 0 - LLC */ \ 183 MOCS_ENTRY(6, \ 184 LE_3_WB | LE_TC_1_LLC | LE_LRUM(1), \ 185 L3_1_UC), \ 186 /* Age 0 - L3 + LLC */ \ 187 MOCS_ENTRY(7, \ 188 LE_3_WB | LE_TC_1_LLC | LE_LRUM(1), \ 189 L3_3_WB), \ 190 /* Age: Don't Chg. - LLC */ \ 191 MOCS_ENTRY(8, \ 192 LE_3_WB | LE_TC_1_LLC | LE_LRUM(2), \ 193 L3_1_UC), \ 194 /* Age: Don't Chg. - L3 + LLC */ \ 195 MOCS_ENTRY(9, \ 196 LE_3_WB | LE_TC_1_LLC | LE_LRUM(2), \ 197 L3_3_WB), \ 198 /* No AOM - LLC */ \ 199 MOCS_ENTRY(10, \ 200 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_AOM(1), \ 201 L3_1_UC), \ 202 /* No AOM - L3 + LLC */ \ 203 MOCS_ENTRY(11, \ 204 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_AOM(1), \ 205 L3_3_WB), \ 206 /* No AOM; Age 0 - LLC */ \ 207 MOCS_ENTRY(12, \ 208 LE_3_WB | LE_TC_1_LLC | LE_LRUM(1) | LE_AOM(1), \ 209 L3_1_UC), \ 210 /* No AOM; Age 0 - L3 + LLC */ \ 211 MOCS_ENTRY(13, \ 212 LE_3_WB | LE_TC_1_LLC | LE_LRUM(1) | LE_AOM(1), \ 213 L3_3_WB), \ 214 /* No AOM; Age:DC - LLC */ \ 215 MOCS_ENTRY(14, \ 216 LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \ 217 L3_1_UC), \ 218 /* No AOM; Age:DC - L3 + LLC */ \ 219 MOCS_ENTRY(15, \ 220 LE_3_WB | LE_TC_1_LLC | LE_LRUM(2) | LE_AOM(1), \ 221 L3_3_WB), \ 222 /* Bypass LLC - Uncached (EHL+) */ \ 223 MOCS_ENTRY(16, \ 224 LE_1_UC | LE_TC_1_LLC | LE_SCF(1), \ 225 L3_1_UC), \ 226 /* Bypass LLC - L3 (Read-Only) (EHL+) */ \ 227 MOCS_ENTRY(17, \ 228 LE_1_UC | LE_TC_1_LLC | LE_SCF(1), \ 229 L3_3_WB), \ 230 /* Self-Snoop - L3 + LLC */ \ 231 MOCS_ENTRY(18, \ 232 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SSE(3), \ 233 L3_3_WB), \ 234 /* Skip Caching - L3 + LLC(12.5%) */ \ 235 MOCS_ENTRY(19, \ 236 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(7), \ 237 L3_3_WB), \ 238 /* Skip Caching - L3 + LLC(25%) */ \ 239 MOCS_ENTRY(20, \ 240 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(3), \ 241 L3_3_WB), \ 242 /* Skip Caching - L3 + LLC(50%) */ \ 243 MOCS_ENTRY(21, \ 244 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_SCC(1), \ 245 L3_3_WB), \ 246 /* Skip Caching - L3 + LLC(75%) */ \ 247 MOCS_ENTRY(22, \ 248 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_RSC(1) | LE_SCC(3), \ 249 L3_3_WB), \ 250 /* Skip Caching - L3 + LLC(87.5%) */ \ 251 MOCS_ENTRY(23, \ 252 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3) | LE_RSC(1) | LE_SCC(7), \ 253 L3_3_WB), \ 254 /* HW Reserved - SW program but never use */ \ 255 MOCS_ENTRY(62, \ 256 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \ 257 L3_1_UC), \ 258 /* HW Reserved - SW program but never use */ \ 259 MOCS_ENTRY(63, \ 260 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \ 261 L3_1_UC) 262 263 static const struct drm_i915_mocs_entry tgl_mocs_table[] = { 264 /* 265 * NOTE: 266 * Reserved and unspecified MOCS indices have been set to (L3 + LCC). 267 * These reserved entries should never be used, they may be changed 268 * to low performant variants with better coherency in the future if 269 * more entries are needed. We are programming index I915_MOCS_PTE(1) 270 * only, __init_mocs_table() take care to program unused index with 271 * this entry. 272 */ 273 MOCS_ENTRY(I915_MOCS_PTE, 274 LE_0_PAGETABLE | LE_TC_0_PAGETABLE, 275 L3_1_UC), 276 GEN11_MOCS_ENTRIES, 277 278 /* Implicitly enable L1 - HDC:L1 + L3 + LLC */ 279 MOCS_ENTRY(48, 280 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 281 L3_3_WB), 282 /* Implicitly enable L1 - HDC:L1 + L3 */ 283 MOCS_ENTRY(49, 284 LE_1_UC | LE_TC_1_LLC, 285 L3_3_WB), 286 /* Implicitly enable L1 - HDC:L1 + LLC */ 287 MOCS_ENTRY(50, 288 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 289 L3_1_UC), 290 /* Implicitly enable L1 - HDC:L1 */ 291 MOCS_ENTRY(51, 292 LE_1_UC | LE_TC_1_LLC, 293 L3_1_UC), 294 /* HW Special Case (CCS) */ 295 MOCS_ENTRY(60, 296 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 297 L3_1_UC), 298 /* HW Special Case (Displayable) */ 299 MOCS_ENTRY(61, 300 LE_1_UC | LE_TC_1_LLC, 301 L3_3_WB), 302 }; 303 304 static const struct drm_i915_mocs_entry icl_mocs_table[] = { 305 /* Base - Uncached (Deprecated) */ 306 MOCS_ENTRY(I915_MOCS_UNCACHED, 307 LE_1_UC | LE_TC_1_LLC, 308 L3_1_UC), 309 /* Base - L3 + LeCC:PAT (Deprecated) */ 310 MOCS_ENTRY(I915_MOCS_PTE, 311 LE_0_PAGETABLE | LE_TC_0_PAGETABLE, 312 L3_3_WB), 313 314 GEN11_MOCS_ENTRIES 315 }; 316 317 static const struct drm_i915_mocs_entry dg1_mocs_table[] = { 318 319 /* UC */ 320 MOCS_ENTRY(1, 0, L3_1_UC), 321 /* WB - L3 */ 322 MOCS_ENTRY(5, 0, L3_3_WB), 323 /* WB - L3 50% */ 324 MOCS_ENTRY(6, 0, L3_ESC(1) | L3_SCC(1) | L3_3_WB), 325 /* WB - L3 25% */ 326 MOCS_ENTRY(7, 0, L3_ESC(1) | L3_SCC(3) | L3_3_WB), 327 /* WB - L3 12.5% */ 328 MOCS_ENTRY(8, 0, L3_ESC(1) | L3_SCC(7) | L3_3_WB), 329 330 /* HDC:L1 + L3 */ 331 MOCS_ENTRY(48, 0, L3_3_WB), 332 /* HDC:L1 */ 333 MOCS_ENTRY(49, 0, L3_1_UC), 334 335 /* HW Reserved */ 336 MOCS_ENTRY(60, 0, L3_1_UC), 337 MOCS_ENTRY(61, 0, L3_1_UC), 338 MOCS_ENTRY(62, 0, L3_1_UC), 339 MOCS_ENTRY(63, 0, L3_1_UC), 340 }; 341 342 static const struct drm_i915_mocs_entry gen12_mocs_table[] = { 343 GEN11_MOCS_ENTRIES, 344 /* Implicitly enable L1 - HDC:L1 + L3 + LLC */ 345 MOCS_ENTRY(48, 346 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 347 L3_3_WB), 348 /* Implicitly enable L1 - HDC:L1 + L3 */ 349 MOCS_ENTRY(49, 350 LE_1_UC | LE_TC_1_LLC, 351 L3_3_WB), 352 /* Implicitly enable L1 - HDC:L1 + LLC */ 353 MOCS_ENTRY(50, 354 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 355 L3_1_UC), 356 /* Implicitly enable L1 - HDC:L1 */ 357 MOCS_ENTRY(51, 358 LE_1_UC | LE_TC_1_LLC, 359 L3_1_UC), 360 /* HW Special Case (CCS) */ 361 MOCS_ENTRY(60, 362 LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), 363 L3_1_UC), 364 /* HW Special Case (Displayable) */ 365 MOCS_ENTRY(61, 366 LE_1_UC | LE_TC_1_LLC, 367 L3_3_WB), 368 }; 369 370 static const struct drm_i915_mocs_entry xehpsdv_mocs_table[] = { 371 /* wa_1608975824 */ 372 MOCS_ENTRY(0, 0, L3_3_WB | L3_LKUP(1)), 373 374 /* UC - Coherent; GO:L3 */ 375 MOCS_ENTRY(1, 0, L3_1_UC | L3_LKUP(1)), 376 /* UC - Coherent; GO:Memory */ 377 MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)), 378 /* UC - Non-Coherent; GO:Memory */ 379 MOCS_ENTRY(3, 0, L3_1_UC | L3_GLBGO(1)), 380 /* UC - Non-Coherent; GO:L3 */ 381 MOCS_ENTRY(4, 0, L3_1_UC), 382 383 /* WB */ 384 MOCS_ENTRY(5, 0, L3_3_WB | L3_LKUP(1)), 385 386 /* HW Reserved - SW program but never use. */ 387 MOCS_ENTRY(48, 0, L3_3_WB | L3_LKUP(1)), 388 MOCS_ENTRY(49, 0, L3_1_UC | L3_LKUP(1)), 389 MOCS_ENTRY(60, 0, L3_1_UC), 390 MOCS_ENTRY(61, 0, L3_1_UC), 391 MOCS_ENTRY(62, 0, L3_1_UC), 392 MOCS_ENTRY(63, 0, L3_1_UC), 393 }; 394 395 static const struct drm_i915_mocs_entry dg2_mocs_table[] = { 396 /* UC - Coherent; GO:L3 */ 397 MOCS_ENTRY(0, 0, L3_1_UC | L3_LKUP(1)), 398 /* UC - Coherent; GO:Memory */ 399 MOCS_ENTRY(1, 0, L3_1_UC | L3_GLBGO(1) | L3_LKUP(1)), 400 /* UC - Non-Coherent; GO:Memory */ 401 MOCS_ENTRY(2, 0, L3_1_UC | L3_GLBGO(1)), 402 403 /* WB - LC */ 404 MOCS_ENTRY(3, 0, L3_3_WB | L3_LKUP(1)), 405 }; 406 407 static const struct drm_i915_mocs_entry pvc_mocs_table[] = { 408 /* Error */ 409 MOCS_ENTRY(0, 0, L3_3_WB), 410 411 /* UC */ 412 MOCS_ENTRY(1, 0, L3_1_UC), 413 414 /* WB */ 415 MOCS_ENTRY(2, 0, L3_3_WB), 416 }; 417 418 static const struct drm_i915_mocs_entry mtl_mocs_table[] = { 419 /* Error - Reserved for Non-Use */ 420 MOCS_ENTRY(0, 421 IG_PAT(0), 422 L3_LKUP(1) | L3_3_WB), 423 /* Cached - L3 + L4 */ 424 MOCS_ENTRY(1, 425 IG_PAT(1), 426 L3_LKUP(1) | L3_3_WB), 427 /* L4 - GO:L3 */ 428 MOCS_ENTRY(2, 429 IG_PAT(1), 430 L3_LKUP(1) | L3_1_UC), 431 /* Uncached - GO:L3 */ 432 MOCS_ENTRY(3, 433 IG_PAT(1) | L4_3_UC, 434 L3_LKUP(1) | L3_1_UC), 435 /* L4 - GO:Mem */ 436 MOCS_ENTRY(4, 437 IG_PAT(1), 438 L3_LKUP(1) | L3_GLBGO(1) | L3_1_UC), 439 /* Uncached - GO:Mem */ 440 MOCS_ENTRY(5, 441 IG_PAT(1) | L4_3_UC, 442 L3_LKUP(1) | L3_GLBGO(1) | L3_1_UC), 443 /* L4 - L3:NoLKUP; GO:L3 */ 444 MOCS_ENTRY(6, 445 IG_PAT(1), 446 L3_1_UC), 447 /* Uncached - L3:NoLKUP; GO:L3 */ 448 MOCS_ENTRY(7, 449 IG_PAT(1) | L4_3_UC, 450 L3_1_UC), 451 /* L4 - L3:NoLKUP; GO:Mem */ 452 MOCS_ENTRY(8, 453 IG_PAT(1), 454 L3_GLBGO(1) | L3_1_UC), 455 /* Uncached - L3:NoLKUP; GO:Mem */ 456 MOCS_ENTRY(9, 457 IG_PAT(1) | L4_3_UC, 458 L3_GLBGO(1) | L3_1_UC), 459 /* Display - L3; L4:WT */ 460 MOCS_ENTRY(14, 461 IG_PAT(1) | L4_1_WT, 462 L3_LKUP(1) | L3_3_WB), 463 /* CCS - Non-Displayable */ 464 MOCS_ENTRY(15, 465 IG_PAT(1), 466 L3_GLBGO(1) | L3_1_UC), 467 }; 468 469 enum { 470 HAS_GLOBAL_MOCS = BIT(0), 471 HAS_ENGINE_MOCS = BIT(1), 472 HAS_RENDER_L3CC = BIT(2), 473 }; 474 has_l3cc(const struct drm_i915_private * i915)475 static bool has_l3cc(const struct drm_i915_private *i915) 476 { 477 return true; 478 } 479 has_global_mocs(const struct drm_i915_private * i915)480 static bool has_global_mocs(const struct drm_i915_private *i915) 481 { 482 return HAS_GLOBAL_MOCS_REGISTERS(i915); 483 } 484 has_mocs(const struct drm_i915_private * i915)485 static bool has_mocs(const struct drm_i915_private *i915) 486 { 487 return !IS_DGFX(i915); 488 } 489 get_mocs_settings(const struct drm_i915_private * i915,struct drm_i915_mocs_table * table)490 static unsigned int get_mocs_settings(const struct drm_i915_private *i915, 491 struct drm_i915_mocs_table *table) 492 { 493 unsigned int flags; 494 495 memset(table, 0, sizeof(struct drm_i915_mocs_table)); 496 497 table->unused_entries_index = I915_MOCS_PTE; 498 if (IS_GFX_GT_IP_RANGE(&i915->gt0, IP_VER(12, 70), IP_VER(12, 71))) { 499 table->size = ARRAY_SIZE(mtl_mocs_table); 500 table->table = mtl_mocs_table; 501 table->n_entries = MTL_NUM_MOCS_ENTRIES; 502 table->uc_index = 9; 503 table->unused_entries_index = 1; 504 } else if (IS_PONTEVECCHIO(i915)) { 505 table->size = ARRAY_SIZE(pvc_mocs_table); 506 table->table = pvc_mocs_table; 507 table->n_entries = PVC_NUM_MOCS_ENTRIES; 508 table->uc_index = 1; 509 table->wb_index = 2; 510 table->unused_entries_index = 2; 511 } else if (IS_DG2(i915)) { 512 table->size = ARRAY_SIZE(dg2_mocs_table); 513 table->table = dg2_mocs_table; 514 table->uc_index = 1; 515 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 516 table->unused_entries_index = 3; 517 } else if (IS_XEHPSDV(i915)) { 518 table->size = ARRAY_SIZE(xehpsdv_mocs_table); 519 table->table = xehpsdv_mocs_table; 520 table->uc_index = 2; 521 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 522 table->unused_entries_index = 5; 523 } else if (IS_DG1(i915)) { 524 table->size = ARRAY_SIZE(dg1_mocs_table); 525 table->table = dg1_mocs_table; 526 table->uc_index = 1; 527 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 528 table->uc_index = 1; 529 table->unused_entries_index = 5; 530 } else if (IS_TIGERLAKE(i915) || IS_ROCKETLAKE(i915)) { 531 /* For TGL/RKL, Can't be changed now for ABI reasons */ 532 table->size = ARRAY_SIZE(tgl_mocs_table); 533 table->table = tgl_mocs_table; 534 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 535 table->uc_index = 3; 536 } else if (GRAPHICS_VER(i915) >= 12) { 537 table->size = ARRAY_SIZE(gen12_mocs_table); 538 table->table = gen12_mocs_table; 539 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 540 table->uc_index = 3; 541 table->unused_entries_index = 2; 542 } else if (GRAPHICS_VER(i915) == 11) { 543 table->size = ARRAY_SIZE(icl_mocs_table); 544 table->table = icl_mocs_table; 545 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 546 } else if (IS_GEN9_BC(i915)) { 547 table->size = ARRAY_SIZE(skl_mocs_table); 548 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 549 table->table = skl_mocs_table; 550 } else if (IS_GEN9_LP(i915)) { 551 table->size = ARRAY_SIZE(broxton_mocs_table); 552 table->n_entries = GEN9_NUM_MOCS_ENTRIES; 553 table->table = broxton_mocs_table; 554 } else { 555 drm_WARN_ONCE(&i915->drm, GRAPHICS_VER(i915) >= 9, 556 "Platform that should have a MOCS table does not.\n"); 557 return 0; 558 } 559 560 if (GEM_DEBUG_WARN_ON(table->size > table->n_entries)) 561 return 0; 562 563 /* WaDisableSkipCaching:skl,bxt,kbl,glk */ 564 if (GRAPHICS_VER(i915) == 9) { 565 int i; 566 567 for (i = 0; i < table->size; i++) 568 if (GEM_DEBUG_WARN_ON(table->table[i].l3cc_value & 569 (L3_ESC(1) | L3_SCC(0x7)))) 570 return 0; 571 } 572 573 flags = 0; 574 if (has_mocs(i915)) { 575 if (has_global_mocs(i915)) 576 flags |= HAS_GLOBAL_MOCS; 577 else 578 flags |= HAS_ENGINE_MOCS; 579 } 580 if (has_l3cc(i915)) 581 flags |= HAS_RENDER_L3CC; 582 583 return flags; 584 } 585 586 /* 587 * Get control_value from MOCS entry taking into account when it's not used 588 * then if unused_entries_index is non-zero then its value will be returned 589 * otherwise I915_MOCS_PTE's value is returned in this case. 590 */ get_entry_control(const struct drm_i915_mocs_table * table,unsigned int index)591 static u32 get_entry_control(const struct drm_i915_mocs_table *table, 592 unsigned int index) 593 { 594 if (index < table->size && table->table[index].used) 595 return table->table[index].control_value; 596 return table->table[table->unused_entries_index].control_value; 597 } 598 599 #define for_each_mocs(mocs, t, i) \ 600 for (i = 0; \ 601 i < (t)->n_entries ? (mocs = get_entry_control((t), i)), 1 : 0;\ 602 i++) 603 __init_mocs_table(struct intel_uncore * uncore,const struct drm_i915_mocs_table * table,u32 addr)604 static void __init_mocs_table(struct intel_uncore *uncore, 605 const struct drm_i915_mocs_table *table, 606 u32 addr) 607 { 608 unsigned int i; 609 u32 mocs; 610 611 drm_WARN_ONCE(&uncore->i915->drm, !table->unused_entries_index, 612 "Unused entries index should have been defined\n"); 613 for_each_mocs(mocs, table, i) 614 intel_uncore_write_fw(uncore, _MMIO(addr + i * 4), mocs); 615 } 616 mocs_offset(const struct intel_engine_cs * engine)617 static u32 mocs_offset(const struct intel_engine_cs *engine) 618 { 619 static const u32 offset[] = { 620 [RCS0] = __GEN9_RCS0_MOCS0, 621 [VCS0] = __GEN9_VCS0_MOCS0, 622 [VCS1] = __GEN9_VCS1_MOCS0, 623 [VECS0] = __GEN9_VECS0_MOCS0, 624 [BCS0] = __GEN9_BCS0_MOCS0, 625 [VCS2] = __GEN11_VCS2_MOCS0, 626 }; 627 628 GEM_BUG_ON(engine->id >= ARRAY_SIZE(offset)); 629 return offset[engine->id]; 630 } 631 init_mocs_table(struct intel_engine_cs * engine,const struct drm_i915_mocs_table * table)632 static void init_mocs_table(struct intel_engine_cs *engine, 633 const struct drm_i915_mocs_table *table) 634 { 635 __init_mocs_table(engine->uncore, table, mocs_offset(engine)); 636 } 637 638 /* 639 * Get l3cc_value from MOCS entry taking into account when it's not used 640 * then if unused_entries_index is not zero then its value will be returned 641 * otherwise I915_MOCS_PTE's value is returned in this case. 642 */ get_entry_l3cc(const struct drm_i915_mocs_table * table,unsigned int index)643 static u16 get_entry_l3cc(const struct drm_i915_mocs_table *table, 644 unsigned int index) 645 { 646 if (index < table->size && table->table[index].used) 647 return table->table[index].l3cc_value; 648 return table->table[table->unused_entries_index].l3cc_value; 649 } 650 l3cc_combine(u16 low,u16 high)651 static u32 l3cc_combine(u16 low, u16 high) 652 { 653 return low | (u32)high << 16; 654 } 655 656 #define for_each_l3cc(l3cc, t, i) \ 657 for (i = 0; \ 658 i < ((t)->n_entries + 1) / 2 ? \ 659 (l3cc = l3cc_combine(get_entry_l3cc((t), 2 * i), \ 660 get_entry_l3cc((t), 2 * i + 1))), 1 : \ 661 0; \ 662 i++) 663 init_l3cc_table(struct intel_gt * gt,const struct drm_i915_mocs_table * table)664 static void init_l3cc_table(struct intel_gt *gt, 665 const struct drm_i915_mocs_table *table) 666 { 667 unsigned long flags; 668 unsigned int i; 669 u32 l3cc; 670 671 intel_gt_mcr_lock(gt, &flags); 672 for_each_l3cc(l3cc, table, i) 673 if (GRAPHICS_VER_FULL(gt->i915) >= IP_VER(12, 50)) 674 intel_gt_mcr_multicast_write_fw(gt, XEHP_LNCFCMOCS(i), l3cc); 675 else 676 intel_uncore_write_fw(gt->uncore, GEN9_LNCFCMOCS(i), l3cc); 677 intel_gt_mcr_unlock(gt, flags); 678 } 679 intel_mocs_init_engine(struct intel_engine_cs * engine)680 void intel_mocs_init_engine(struct intel_engine_cs *engine) 681 { 682 struct drm_i915_mocs_table table; 683 unsigned int flags; 684 685 /* Called under a blanket forcewake */ 686 assert_forcewakes_active(engine->uncore, FORCEWAKE_ALL); 687 688 flags = get_mocs_settings(engine->i915, &table); 689 if (!flags) 690 return; 691 692 /* Platforms with global MOCS do not need per-engine initialization. */ 693 if (flags & HAS_ENGINE_MOCS) 694 init_mocs_table(engine, &table); 695 696 if (flags & HAS_RENDER_L3CC && engine->class == RENDER_CLASS) 697 init_l3cc_table(engine->gt, &table); 698 } 699 global_mocs_offset(void)700 static u32 global_mocs_offset(void) 701 { 702 return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0)); 703 } 704 intel_set_mocs_index(struct intel_gt * gt)705 void intel_set_mocs_index(struct intel_gt *gt) 706 { 707 struct drm_i915_mocs_table table; 708 709 get_mocs_settings(gt->i915, &table); 710 gt->mocs.uc_index = table.uc_index; 711 if (HAS_L3_CCS_READ(gt->i915)) 712 gt->mocs.wb_index = table.wb_index; 713 } 714 intel_mocs_init(struct intel_gt * gt)715 void intel_mocs_init(struct intel_gt *gt) 716 { 717 struct drm_i915_mocs_table table; 718 unsigned int flags; 719 720 /* 721 * LLC and eDRAM control values are not applicable to dgfx 722 */ 723 flags = get_mocs_settings(gt->i915, &table); 724 if (flags & HAS_GLOBAL_MOCS) 725 __init_mocs_table(gt->uncore, &table, global_mocs_offset()); 726 727 /* 728 * Initialize the L3CC table as part of mocs initalization to make 729 * sure the LNCFCMOCSx registers are programmed for the subsequent 730 * memory transactions including guc transactions 731 */ 732 if (flags & HAS_RENDER_L3CC) 733 init_l3cc_table(gt, &table); 734 } 735 736 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) 737 #include "selftest_mocs.c" 738 #endif 739