2 * SPDX-License-Identifier: MIT
4 * Copyright © 2014-2018 Intel Corporation
8 #include "intel_context.h"
10 #include "intel_workarounds.h"
13 * DOC: Hardware workarounds
15 * This file is intended as a central place to implement most [1]_ of the
16 * required workarounds for hardware to work as originally intended. They fall
17 * in five basic categories depending on how/when they are applied:
19 * - Workarounds that touch registers that are saved/restored to/from the HW
20 * context image. The list is emitted (via Load Register Immediate commands)
21 * everytime a new context is created.
22 * - GT workarounds. The list of these WAs is applied whenever these registers
23 * revert to default values (on GPU reset, suspend/resume [2]_, etc..).
24 * - Display workarounds. The list is applied during display clock-gating
26 * - Workarounds that whitelist a privileged register, so that UMDs can manage
27 * them directly. This is just a special case of a MMMIO workaround (as we
28 * write the list of these to/be-whitelisted registers to some special HW
30 * - Workaround batchbuffers, that get executed automatically by the hardware
31 * on every HW context restore.
33 * .. [1] Please notice that there are other WAs that, due to their nature,
34 * cannot be applied from a central place. Those are peppered around the rest
35 * of the code, as needed.
37 * .. [2] Technically, some registers are powercontext saved & restored, so they
38 * survive a suspend/resume. In practice, writing them again is not too
39 * costly and simplifies things. We can revisit this in the future.
44 * Keep things in this file ordered by WA type, as per the above (context, GT,
45 * display, register whitelist, batchbuffer). Then, inside each type, keep the
48 * - Infrastructure functions and macros
49 * - WAs per platform in standard gen/chrono order
50 * - Public functions to init or apply the given workaround type.
53 static void wa_init_start(struct i915_wa_list *wal, const char *name, const char *engine_name)
56 wal->engine_name = engine_name;
59 #define WA_LIST_CHUNK (1 << 4)
61 static void wa_init_finish(struct i915_wa_list *wal)
63 /* Trim unused entries. */
64 if (!IS_ALIGNED(wal->count, WA_LIST_CHUNK)) {
65 struct i915_wa *list = kmemdup(wal->list,
66 wal->count * sizeof(*list),
78 DRM_DEBUG_DRIVER("Initialized %u %s workarounds on %s\n",
79 wal->wa_count, wal->name, wal->engine_name);
82 static void _wa_add(struct i915_wa_list *wal, const struct i915_wa *wa)
84 unsigned int addr = i915_mmio_reg_offset(wa->reg);
85 unsigned int start = 0, end = wal->count;
86 const unsigned int grow = WA_LIST_CHUNK;
89 GEM_BUG_ON(!is_power_of_2(grow));
91 if (IS_ALIGNED(wal->count, grow)) { /* Either uninitialized or full. */
94 list = kmalloc_array(ALIGN(wal->count + 1, grow), sizeof(*wa),
97 DRM_ERROR("No space for workaround init!\n");
102 memcpy(list, wal->list, sizeof(*wa) * wal->count);
107 while (start < end) {
108 unsigned int mid = start + (end - start) / 2;
110 if (i915_mmio_reg_offset(wal->list[mid].reg) < addr) {
112 } else if (i915_mmio_reg_offset(wal->list[mid].reg) > addr) {
115 wa_ = &wal->list[mid];
117 if ((wa->mask & ~wa_->mask) == 0) {
118 DRM_ERROR("Discarding overwritten w/a for reg %04x (mask: %08x, value: %08x)\n",
119 i915_mmio_reg_offset(wa_->reg),
120 wa_->mask, wa_->val);
122 wa_->val &= ~wa->mask;
127 wa_->mask |= wa->mask;
128 wa_->read |= wa->read;
134 wa_ = &wal->list[wal->count++];
137 while (wa_-- > wal->list) {
138 GEM_BUG_ON(i915_mmio_reg_offset(wa_[0].reg) ==
139 i915_mmio_reg_offset(wa_[1].reg));
140 if (i915_mmio_reg_offset(wa_[1].reg) >
141 i915_mmio_reg_offset(wa_[0].reg))
144 swap(wa_[1], wa_[0]);
149 wa_write_masked_or(struct i915_wa_list *wal, i915_reg_t reg, u32 mask,
152 struct i915_wa wa = {
163 wa_masked_en(struct i915_wa_list *wal, i915_reg_t reg, u32 val)
165 wa_write_masked_or(wal, reg, val, _MASKED_BIT_ENABLE(val));
169 wa_write(struct i915_wa_list *wal, i915_reg_t reg, u32 val)
171 wa_write_masked_or(wal, reg, ~0, val);
175 wa_write_or(struct i915_wa_list *wal, i915_reg_t reg, u32 val)
177 wa_write_masked_or(wal, reg, val, val);
180 #define WA_SET_BIT_MASKED(addr, mask) \
181 wa_write_masked_or(wal, (addr), (mask), _MASKED_BIT_ENABLE(mask))
183 #define WA_CLR_BIT_MASKED(addr, mask) \
184 wa_write_masked_or(wal, (addr), (mask), _MASKED_BIT_DISABLE(mask))
186 #define WA_SET_FIELD_MASKED(addr, mask, value) \
187 wa_write_masked_or(wal, (addr), (mask), _MASKED_FIELD((mask), (value)))
189 static void gen8_ctx_workarounds_init(struct intel_engine_cs *engine,
190 struct i915_wa_list *wal)
192 WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING);
194 /* WaDisableAsyncFlipPerfMode:bdw,chv */
195 WA_SET_BIT_MASKED(MI_MODE, ASYNC_FLIP_PERF_DISABLE);
197 /* WaDisablePartialInstShootdown:bdw,chv */
198 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
199 PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
201 /* Use Force Non-Coherent whenever executing a 3D context. This is a
202 * workaround for for a possible hang in the unlikely event a TLB
203 * invalidation occurs during a PSD flush.
205 /* WaForceEnableNonCoherent:bdw,chv */
206 /* WaHdcDisableFetchWhenMasked:bdw,chv */
207 WA_SET_BIT_MASKED(HDC_CHICKEN0,
208 HDC_DONOT_FETCH_MEM_WHEN_MASKED |
209 HDC_FORCE_NON_COHERENT);
211 /* From the Haswell PRM, Command Reference: Registers, CACHE_MODE_0:
212 * "The Hierarchical Z RAW Stall Optimization allows non-overlapping
213 * polygons in the same 8x4 pixel/sample area to be processed without
214 * stalling waiting for the earlier ones to write to Hierarchical Z
217 * This optimization is off by default for BDW and CHV; turn it on.
219 WA_CLR_BIT_MASKED(CACHE_MODE_0_GEN7, HIZ_RAW_STALL_OPT_DISABLE);
221 /* Wa4x4STCOptimizationDisable:bdw,chv */
222 WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE);
225 * BSpec recommends 8x4 when MSAA is used,
226 * however in practice 16x4 seems fastest.
228 * Note that PS/WM thread counts depend on the WIZ hashing
229 * disable bit, which we don't touch here, but it's good
230 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
232 WA_SET_FIELD_MASKED(GEN7_GT_MODE,
233 GEN6_WIZ_HASHING_MASK,
234 GEN6_WIZ_HASHING_16x4);
237 static void bdw_ctx_workarounds_init(struct intel_engine_cs *engine,
238 struct i915_wa_list *wal)
240 struct drm_i915_private *i915 = engine->i915;
242 gen8_ctx_workarounds_init(engine, wal);
244 /* WaDisableThreadStallDopClockGating:bdw (pre-production) */
245 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
247 /* WaDisableDopClockGating:bdw
249 * Also see the related UCGTCL1 write in broadwell_init_clock_gating()
250 * to disable EUTC clock gating.
252 WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
253 DOP_CLOCK_GATING_DISABLE);
255 WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
256 GEN8_SAMPLER_POWER_BYPASS_DIS);
258 WA_SET_BIT_MASKED(HDC_CHICKEN0,
259 /* WaForceContextSaveRestoreNonCoherent:bdw */
260 HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT |
261 /* WaDisableFenceDestinationToSLM:bdw (pre-prod) */
262 (IS_BDW_GT3(i915) ? HDC_FENCE_DEST_SLM_DISABLE : 0));
265 static void chv_ctx_workarounds_init(struct intel_engine_cs *engine,
266 struct i915_wa_list *wal)
268 gen8_ctx_workarounds_init(engine, wal);
270 /* WaDisableThreadStallDopClockGating:chv */
271 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
273 /* Improve HiZ throughput on CHV. */
274 WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X);
277 static void gen9_ctx_workarounds_init(struct intel_engine_cs *engine,
278 struct i915_wa_list *wal)
280 struct drm_i915_private *i915 = engine->i915;
283 /* WaCompressedResourceSamplerPbeMediaNewHashMode:skl,kbl
285 * Must match Display Engine. See
286 * WaCompressedResourceDisplayNewHashMode.
288 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
289 GEN9_PBE_COMPRESSED_HASH_SELECTION);
290 WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
291 GEN9_SAMPLER_HASH_COMPRESSED_READ_ADDR);
294 /* WaClearFlowControlGpgpuContextSave:skl,bxt,kbl,glk,cfl */
295 /* WaDisablePartialInstShootdown:skl,bxt,kbl,glk,cfl */
296 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
297 FLOW_CONTROL_ENABLE |
298 PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
300 /* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk,cfl */
301 /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */
302 WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
303 GEN9_ENABLE_YV12_BUGFIX |
304 GEN9_ENABLE_GPGPU_PREEMPTION);
306 /* Wa4x4STCOptimizationDisable:skl,bxt,kbl,glk,cfl */
307 /* WaDisablePartialResolveInVc:skl,bxt,kbl,cfl */
308 WA_SET_BIT_MASKED(CACHE_MODE_1,
309 GEN8_4x4_STC_OPTIMIZATION_DISABLE |
310 GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE);
312 /* WaCcsTlbPrefetchDisable:skl,bxt,kbl,glk,cfl */
313 WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5,
314 GEN9_CCS_TLB_PREFETCH_ENABLE);
316 /* WaForceContextSaveRestoreNonCoherent:skl,bxt,kbl,cfl */
317 WA_SET_BIT_MASKED(HDC_CHICKEN0,
318 HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT |
319 HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE);
321 /* WaForceEnableNonCoherent and WaDisableHDCInvalidation are
322 * both tied to WaForceContextSaveRestoreNonCoherent
323 * in some hsds for skl. We keep the tie for all gen9. The
324 * documentation is a bit hazy and so we want to get common behaviour,
325 * even though there is no clear evidence we would need both on kbl/bxt.
326 * This area has been source of system hangs so we play it safe
327 * and mimic the skl regardless of what bspec says.
329 * Use Force Non-Coherent whenever executing a 3D context. This
330 * is a workaround for a possible hang in the unlikely event
331 * a TLB invalidation occurs during a PSD flush.
334 /* WaForceEnableNonCoherent:skl,bxt,kbl,cfl */
335 WA_SET_BIT_MASKED(HDC_CHICKEN0,
336 HDC_FORCE_NON_COHERENT);
338 /* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt,kbl,cfl */
339 if (IS_SKYLAKE(i915) || IS_KABYLAKE(i915) || IS_COFFEELAKE(i915))
340 WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
341 GEN8_SAMPLER_POWER_BYPASS_DIS);
343 /* WaDisableSTUnitPowerOptimization:skl,bxt,kbl,glk,cfl */
344 WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE);
347 * Supporting preemption with fine-granularity requires changes in the
348 * batch buffer programming. Since we can't break old userspace, we
349 * need to set our default preemption level to safe value. Userspace is
350 * still able to use more fine-grained preemption levels, since in
351 * WaEnablePreemptionGranularityControlByUMD we're whitelisting the
352 * per-ctx register. As such, WaDisable{3D,GPGPU}MidCmdPreemption are
353 * not real HW workarounds, but merely a way to start using preemption
354 * while maintaining old contract with userspace.
357 /* WaDisable3DMidCmdPreemption:skl,bxt,glk,cfl,[cnl] */
358 WA_CLR_BIT_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_3D_OBJECT_LEVEL);
360 /* WaDisableGPGPUMidCmdPreemption:skl,bxt,blk,cfl,[cnl] */
361 WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
362 GEN9_PREEMPT_GPGPU_LEVEL_MASK,
363 GEN9_PREEMPT_GPGPU_COMMAND_LEVEL);
365 /* WaClearHIZ_WM_CHICKEN3:bxt,glk */
366 if (IS_GEN9_LP(i915))
367 WA_SET_BIT_MASKED(GEN9_WM_CHICKEN3, GEN9_FACTOR_IN_CLR_VAL_HIZ);
370 static void skl_tune_iz_hashing(struct intel_engine_cs *engine,
371 struct i915_wa_list *wal)
373 struct drm_i915_private *i915 = engine->i915;
374 u8 vals[3] = { 0, 0, 0 };
377 for (i = 0; i < 3; i++) {
381 * Only consider slices where one, and only one, subslice has 7
384 if (!is_power_of_2(RUNTIME_INFO(i915)->sseu.subslice_7eu[i]))
388 * subslice_7eu[i] != 0 (because of the check above) and
389 * ss_max == 4 (maximum number of subslices possible per slice)
393 ss = ffs(RUNTIME_INFO(i915)->sseu.subslice_7eu[i]) - 1;
397 if (vals[0] == 0 && vals[1] == 0 && vals[2] == 0)
400 /* Tune IZ hashing. See intel_device_info_runtime_init() */
401 WA_SET_FIELD_MASKED(GEN7_GT_MODE,
402 GEN9_IZ_HASHING_MASK(2) |
403 GEN9_IZ_HASHING_MASK(1) |
404 GEN9_IZ_HASHING_MASK(0),
405 GEN9_IZ_HASHING(2, vals[2]) |
406 GEN9_IZ_HASHING(1, vals[1]) |
407 GEN9_IZ_HASHING(0, vals[0]));
410 static void skl_ctx_workarounds_init(struct intel_engine_cs *engine,
411 struct i915_wa_list *wal)
413 gen9_ctx_workarounds_init(engine, wal);
414 skl_tune_iz_hashing(engine, wal);
417 static void bxt_ctx_workarounds_init(struct intel_engine_cs *engine,
418 struct i915_wa_list *wal)
420 gen9_ctx_workarounds_init(engine, wal);
422 /* WaDisableThreadStallDopClockGating:bxt */
423 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
424 STALL_DOP_GATING_DISABLE);
426 /* WaToEnableHwFixForPushConstHWBug:bxt */
427 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
428 GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
431 static void kbl_ctx_workarounds_init(struct intel_engine_cs *engine,
432 struct i915_wa_list *wal)
434 struct drm_i915_private *i915 = engine->i915;
436 gen9_ctx_workarounds_init(engine, wal);
438 /* WaToEnableHwFixForPushConstHWBug:kbl */
439 if (IS_KBL_REVID(i915, KBL_REVID_C0, REVID_FOREVER))
440 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
441 GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
443 /* WaDisableSbeCacheDispatchPortSharing:kbl */
444 WA_SET_BIT_MASKED(GEN7_HALF_SLICE_CHICKEN1,
445 GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
448 static void glk_ctx_workarounds_init(struct intel_engine_cs *engine,
449 struct i915_wa_list *wal)
451 gen9_ctx_workarounds_init(engine, wal);
453 /* WaToEnableHwFixForPushConstHWBug:glk */
454 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
455 GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
458 static void cfl_ctx_workarounds_init(struct intel_engine_cs *engine,
459 struct i915_wa_list *wal)
461 gen9_ctx_workarounds_init(engine, wal);
463 /* WaToEnableHwFixForPushConstHWBug:cfl */
464 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
465 GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
467 /* WaDisableSbeCacheDispatchPortSharing:cfl */
468 WA_SET_BIT_MASKED(GEN7_HALF_SLICE_CHICKEN1,
469 GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
472 static void cnl_ctx_workarounds_init(struct intel_engine_cs *engine,
473 struct i915_wa_list *wal)
475 struct drm_i915_private *i915 = engine->i915;
477 /* WaForceContextSaveRestoreNonCoherent:cnl */
478 WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0,
479 HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT);
481 /* WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod) */
482 if (IS_CNL_REVID(i915, CNL_REVID_B0, CNL_REVID_B0))
483 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, THROTTLE_12_5);
485 /* WaDisableReplayBufferBankArbitrationOptimization:cnl */
486 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
487 GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
489 /* WaDisableEnhancedSBEVertexCaching:cnl (pre-prod) */
490 if (IS_CNL_REVID(i915, 0, CNL_REVID_B0))
491 WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
492 GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE);
494 /* WaPushConstantDereferenceHoldDisable:cnl */
495 WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
497 /* FtrEnableFastAnisoL1BankingFix:cnl */
498 WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, CNL_FAST_ANISO_L1_BANKING_FIX);
500 /* WaDisable3DMidCmdPreemption:cnl */
501 WA_CLR_BIT_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_3D_OBJECT_LEVEL);
503 /* WaDisableGPGPUMidCmdPreemption:cnl */
504 WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
505 GEN9_PREEMPT_GPGPU_LEVEL_MASK,
506 GEN9_PREEMPT_GPGPU_COMMAND_LEVEL);
508 /* WaDisableEarlyEOT:cnl */
509 WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, DISABLE_EARLY_EOT);
512 static void icl_ctx_workarounds_init(struct intel_engine_cs *engine,
513 struct i915_wa_list *wal)
515 struct drm_i915_private *i915 = engine->i915;
517 /* WaDisableBankHangMode:icl */
520 intel_uncore_read(engine->uncore, GEN8_L3CNTLREG) |
523 /* Wa_1604370585:icl (pre-prod)
524 * Formerly known as WaPushConstantDereferenceHoldDisable
526 if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0))
527 WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
528 PUSH_CONSTANT_DEREF_DISABLE);
530 /* WaForceEnableNonCoherent:icl
531 * This is not the same workaround as in early Gen9 platforms, where
532 * lacking this could cause system hangs, but coherency performance
533 * overhead is high and only a few compute workloads really need it
534 * (the register is whitelisted in hardware now, so UMDs can opt in
535 * for coherency if they have a good reason).
537 WA_SET_BIT_MASKED(ICL_HDC_MODE, HDC_FORCE_NON_COHERENT);
539 /* Wa_2006611047:icl (pre-prod)
540 * Formerly known as WaDisableImprovedTdlClkGating
542 if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_A0))
543 WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
544 GEN11_TDL_CLOCK_GATING_FIX_DISABLE);
546 /* Wa_2006665173:icl (pre-prod) */
547 if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_A0))
548 WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3,
549 GEN11_BLEND_EMB_FIX_DISABLE_IN_RCC);
551 /* WaEnableFloatBlendOptimization:icl */
552 wa_write_masked_or(wal,
554 0, /* write-only, so skip validation */
555 _MASKED_BIT_ENABLE(FLOAT_BLEND_OPTIMIZATION_ENABLE));
557 /* WaDisableGPGPUMidThreadPreemption:icl */
558 WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
559 GEN9_PREEMPT_GPGPU_LEVEL_MASK,
560 GEN9_PREEMPT_GPGPU_THREAD_GROUP_LEVEL);
562 /* allow headerless messages for preemptible GPGPU context */
563 WA_SET_BIT_MASKED(GEN10_SAMPLER_MODE,
564 GEN11_SAMPLER_ENABLE_HEADLESS_MSG);
567 static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine,
568 struct i915_wa_list *wal)
573 __intel_engine_init_ctx_wa(struct intel_engine_cs *engine,
574 struct i915_wa_list *wal,
577 struct drm_i915_private *i915 = engine->i915;
579 if (engine->class != RENDER_CLASS)
582 wa_init_start(wal, name, engine->name);
584 if (IS_GEN(i915, 12))
585 tgl_ctx_workarounds_init(engine, wal);
586 else if (IS_GEN(i915, 11))
587 icl_ctx_workarounds_init(engine, wal);
588 else if (IS_CANNONLAKE(i915))
589 cnl_ctx_workarounds_init(engine, wal);
590 else if (IS_COFFEELAKE(i915))
591 cfl_ctx_workarounds_init(engine, wal);
592 else if (IS_GEMINILAKE(i915))
593 glk_ctx_workarounds_init(engine, wal);
594 else if (IS_KABYLAKE(i915))
595 kbl_ctx_workarounds_init(engine, wal);
596 else if (IS_BROXTON(i915))
597 bxt_ctx_workarounds_init(engine, wal);
598 else if (IS_SKYLAKE(i915))
599 skl_ctx_workarounds_init(engine, wal);
600 else if (IS_CHERRYVIEW(i915))
601 chv_ctx_workarounds_init(engine, wal);
602 else if (IS_BROADWELL(i915))
603 bdw_ctx_workarounds_init(engine, wal);
604 else if (INTEL_GEN(i915) < 8)
607 MISSING_CASE(INTEL_GEN(i915));
612 void intel_engine_init_ctx_wa(struct intel_engine_cs *engine)
614 __intel_engine_init_ctx_wa(engine, &engine->ctx_wa_list, "context");
617 int intel_engine_emit_ctx_wa(struct i915_request *rq)
619 struct i915_wa_list *wal = &rq->engine->ctx_wa_list;
628 ret = rq->engine->emit_flush(rq, EMIT_BARRIER);
632 cs = intel_ring_begin(rq, (wal->count * 2 + 2));
636 *cs++ = MI_LOAD_REGISTER_IMM(wal->count);
637 for (i = 0, wa = wal->list; i < wal->count; i++, wa++) {
638 *cs++ = i915_mmio_reg_offset(wa->reg);
643 intel_ring_advance(rq, cs);
645 ret = rq->engine->emit_flush(rq, EMIT_BARRIER);
653 gen9_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
655 /* WaDisableKillLogic:bxt,skl,kbl */
656 if (!IS_COFFEELAKE(i915))
662 /* WaCompressedResourceSamplerPbeMediaNewHashMode:skl,kbl
664 * Must match Display Engine. See
665 * WaCompressedResourceDisplayNewHashMode.
669 MMCD_PCLA | MMCD_HOTSPOT_EN);
672 /* WaDisableHDCInvalidation:skl,bxt,kbl,cfl */
675 BDW_DISABLE_HDC_INVALIDATION);
679 skl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
681 gen9_gt_workarounds_init(i915, wal);
683 /* WaDisableGafsUnitClkGating:skl */
686 GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE);
688 /* WaInPlaceDecompressionHang:skl */
689 if (IS_SKL_REVID(i915, SKL_REVID_H0, REVID_FOREVER))
691 GEN9_GAMT_ECO_REG_RW_IA,
692 GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
696 bxt_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
698 gen9_gt_workarounds_init(i915, wal);
700 /* WaInPlaceDecompressionHang:bxt */
702 GEN9_GAMT_ECO_REG_RW_IA,
703 GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
707 kbl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
709 gen9_gt_workarounds_init(i915, wal);
711 /* WaDisableDynamicCreditSharing:kbl */
712 if (IS_KBL_REVID(i915, 0, KBL_REVID_B0))
715 GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING);
717 /* WaDisableGafsUnitClkGating:kbl */
720 GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE);
722 /* WaInPlaceDecompressionHang:kbl */
724 GEN9_GAMT_ECO_REG_RW_IA,
725 GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
729 glk_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
731 gen9_gt_workarounds_init(i915, wal);
735 cfl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
737 gen9_gt_workarounds_init(i915, wal);
739 /* WaDisableGafsUnitClkGating:cfl */
742 GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE);
744 /* WaInPlaceDecompressionHang:cfl */
746 GEN9_GAMT_ECO_REG_RW_IA,
747 GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
751 wa_init_mcr(struct drm_i915_private *i915, struct i915_wa_list *wal)
753 const struct sseu_dev_info *sseu = &RUNTIME_INFO(i915)->sseu;
754 unsigned int slice, subslice;
755 u32 l3_en, mcr, mcr_mask;
757 GEM_BUG_ON(INTEL_GEN(i915) < 10);
760 * WaProgramMgsrForL3BankSpecificMmioReads: cnl,icl
761 * L3Banks could be fused off in single slice scenario. If that is
762 * the case, we might need to program MCR select to a valid L3Bank
763 * by default, to make sure we correctly read certain registers
764 * later on (in the range 0xB100 - 0xB3FF).
766 * WaProgramMgsrForCorrectSliceSpecificMmioReads:cnl,icl
767 * Before any MMIO read into slice/subslice specific registers, MCR
768 * packet control register needs to be programmed to point to any
769 * enabled s/ss pair. Otherwise, incorrect values will be returned.
770 * This means each subsequent MMIO read will be forwarded to an
771 * specific s/ss combination, but this is OK since these registers
772 * are consistent across s/ss in almost all cases. In the rare
773 * occasions, such as INSTDONE, where this value is dependent
774 * on s/ss combo, the read should be done with read_subslice_reg.
776 * Since GEN8_MCR_SELECTOR contains dual-purpose bits which select both
777 * to which subslice, or to which L3 bank, the respective mmio reads
778 * will go, we have to find a common index which works for both
781 * Case where we cannot find a common index fortunately should not
782 * happen in production hardware, so we only emit a warning instead of
783 * implementing something more complex that requires checking the range
784 * of every MMIO read.
787 if (INTEL_GEN(i915) >= 10 && is_power_of_2(sseu->slice_mask)) {
789 intel_uncore_read(&i915->uncore, GEN10_MIRROR_FUSE3) &
792 DRM_DEBUG_DRIVER("L3 fuse = %x\n", l3_fuse);
793 l3_en = ~(l3_fuse << GEN10_L3BANK_PAIR_COUNT | l3_fuse);
798 slice = fls(sseu->slice_mask) - 1;
799 GEM_BUG_ON(slice >= ARRAY_SIZE(sseu->subslice_mask));
800 subslice = fls(l3_en & sseu->subslice_mask[slice]);
802 DRM_WARN("No common index found between subslice mask %x and L3 bank mask %x!\n",
803 sseu->subslice_mask[slice], l3_en);
804 subslice = fls(l3_en);
809 if (INTEL_GEN(i915) >= 11) {
810 mcr = GEN11_MCR_SLICE(slice) | GEN11_MCR_SUBSLICE(subslice);
811 mcr_mask = GEN11_MCR_SLICE_MASK | GEN11_MCR_SUBSLICE_MASK;
813 mcr = GEN8_MCR_SLICE(slice) | GEN8_MCR_SUBSLICE(subslice);
814 mcr_mask = GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK;
817 DRM_DEBUG_DRIVER("MCR slice/subslice = %x\n", mcr);
819 wa_write_masked_or(wal, GEN8_MCR_SELECTOR, mcr_mask, mcr);
823 cnl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
825 wa_init_mcr(i915, wal);
827 /* WaDisableI2mCycleOnWRPort:cnl (pre-prod) */
828 if (IS_CNL_REVID(i915, CNL_REVID_B0, CNL_REVID_B0))
831 GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT);
833 /* WaInPlaceDecompressionHang:cnl */
835 GEN9_GAMT_ECO_REG_RW_IA,
836 GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
840 icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
842 wa_init_mcr(i915, wal);
844 /* WaInPlaceDecompressionHang:icl */
846 GEN9_GAMT_ECO_REG_RW_IA,
847 GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
849 /* WaModifyGamTlbPartitioning:icl */
850 wa_write_masked_or(wal,
851 GEN11_GACB_PERF_CTRL,
852 GEN11_HASH_CTRL_MASK,
853 GEN11_HASH_CTRL_BIT0 | GEN11_HASH_CTRL_BIT4);
856 * Formerly known as WaCL2SFHalfMaxAlloc
860 GEN11_LSN_UNSLCVC_GAFS_HALF_SF_MAXALLOC |
861 GEN11_LSN_UNSLCVC_GAFS_HALF_CL2_MAXALLOC);
864 * Formerly known as WaDisCtxReload
867 GEN8_GAMW_ECO_DEV_RW_IA,
868 GAMW_ECO_DEV_CTX_RELOAD_DISABLE);
870 /* Wa_1405779004:icl (pre-prod) */
871 if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_A0))
873 SLICE_UNIT_LEVEL_CLKGATE,
874 MSCUNIT_CLKGATE_DIS);
876 /* Wa_1406680159:icl */
878 SUBSLICE_UNIT_LEVEL_CLKGATE,
881 /* Wa_1406838659:icl (pre-prod) */
882 if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0))
884 INF_UNIT_LEVEL_CLKGATE,
888 * Formerly known as WaGamTlbPendError
892 GAMT_CHKN_DISABLE_L3_COH_PIPE);
896 tgl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
901 gt_init_workarounds(struct drm_i915_private *i915, struct i915_wa_list *wal)
903 if (IS_GEN(i915, 12))
904 tgl_gt_workarounds_init(i915, wal);
905 else if (IS_GEN(i915, 11))
906 icl_gt_workarounds_init(i915, wal);
907 else if (IS_CANNONLAKE(i915))
908 cnl_gt_workarounds_init(i915, wal);
909 else if (IS_COFFEELAKE(i915))
910 cfl_gt_workarounds_init(i915, wal);
911 else if (IS_GEMINILAKE(i915))
912 glk_gt_workarounds_init(i915, wal);
913 else if (IS_KABYLAKE(i915))
914 kbl_gt_workarounds_init(i915, wal);
915 else if (IS_BROXTON(i915))
916 bxt_gt_workarounds_init(i915, wal);
917 else if (IS_SKYLAKE(i915))
918 skl_gt_workarounds_init(i915, wal);
919 else if (INTEL_GEN(i915) <= 8)
922 MISSING_CASE(INTEL_GEN(i915));
925 void intel_gt_init_workarounds(struct drm_i915_private *i915)
927 struct i915_wa_list *wal = &i915->gt_wa_list;
929 wa_init_start(wal, "GT", "global");
930 gt_init_workarounds(i915, wal);
934 static enum forcewake_domains
935 wal_get_fw_for_rmw(struct intel_uncore *uncore, const struct i915_wa_list *wal)
937 enum forcewake_domains fw = 0;
941 for (i = 0, wa = wal->list; i < wal->count; i++, wa++)
942 fw |= intel_uncore_forcewake_for_reg(uncore,
951 wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from)
953 if ((cur ^ wa->val) & wa->read) {
954 DRM_ERROR("%s workaround lost on %s! (%x=%x/%x, expected %x, mask=%x)\n",
955 name, from, i915_mmio_reg_offset(wa->reg),
966 wa_list_apply(struct intel_uncore *uncore, const struct i915_wa_list *wal)
968 enum forcewake_domains fw;
976 fw = wal_get_fw_for_rmw(uncore, wal);
978 spin_lock_irqsave(&uncore->lock, flags);
979 intel_uncore_forcewake_get__locked(uncore, fw);
981 for (i = 0, wa = wal->list; i < wal->count; i++, wa++) {
982 intel_uncore_rmw_fw(uncore, wa->reg, wa->mask, wa->val);
983 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
985 intel_uncore_read_fw(uncore, wa->reg),
986 wal->name, "application");
989 intel_uncore_forcewake_put__locked(uncore, fw);
990 spin_unlock_irqrestore(&uncore->lock, flags);
993 void intel_gt_apply_workarounds(struct intel_gt *gt)
995 wa_list_apply(gt->uncore, >->i915->gt_wa_list);
998 static bool wa_list_verify(struct intel_uncore *uncore,
999 const struct i915_wa_list *wal,
1006 for (i = 0, wa = wal->list; i < wal->count; i++, wa++)
1008 intel_uncore_read(uncore, wa->reg),
1014 bool intel_gt_verify_workarounds(struct intel_gt *gt, const char *from)
1016 return wa_list_verify(gt->uncore, >->i915->gt_wa_list, from);
1019 static inline bool is_nonpriv_flags_valid(u32 flags)
1021 /* Check only valid flag bits are set */
1022 if (flags & ~RING_FORCE_TO_NONPRIV_MASK_VALID)
1025 /* NB: Only 3 out of 4 enum values are valid for access field */
1026 if ((flags & RING_FORCE_TO_NONPRIV_ACCESS_MASK) ==
1027 RING_FORCE_TO_NONPRIV_ACCESS_INVALID)
1034 whitelist_reg_ext(struct i915_wa_list *wal, i915_reg_t reg, u32 flags)
1036 struct i915_wa wa = {
1040 if (GEM_DEBUG_WARN_ON(wal->count >= RING_MAX_NONPRIV_SLOTS))
1043 if (GEM_DEBUG_WARN_ON(!is_nonpriv_flags_valid(flags)))
1046 wa.reg.reg |= flags;
1051 whitelist_reg(struct i915_wa_list *wal, i915_reg_t reg)
1053 whitelist_reg_ext(wal, reg, RING_FORCE_TO_NONPRIV_ACCESS_RW);
1056 static void gen9_whitelist_build(struct i915_wa_list *w)
1058 /* WaVFEStateAfterPipeControlwithMediaStateClear:skl,bxt,glk,cfl */
1059 whitelist_reg(w, GEN9_CTX_PREEMPT_REG);
1061 /* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */
1062 whitelist_reg(w, GEN8_CS_CHICKEN1);
1064 /* WaAllowUMDToModifyHDCChicken1:skl,bxt,kbl,glk,cfl */
1065 whitelist_reg(w, GEN8_HDC_CHICKEN1);
1067 /* WaSendPushConstantsFromMMIO:skl,bxt */
1068 whitelist_reg(w, COMMON_SLICE_CHICKEN2);
1071 static void skl_whitelist_build(struct intel_engine_cs *engine)
1073 struct i915_wa_list *w = &engine->whitelist;
1075 if (engine->class != RENDER_CLASS)
1078 gen9_whitelist_build(w);
1080 /* WaDisableLSQCROPERFforOCL:skl */
1081 whitelist_reg(w, GEN8_L3SQCREG4);
1084 static void bxt_whitelist_build(struct intel_engine_cs *engine)
1086 if (engine->class != RENDER_CLASS)
1089 gen9_whitelist_build(&engine->whitelist);
1092 static void kbl_whitelist_build(struct intel_engine_cs *engine)
1094 struct i915_wa_list *w = &engine->whitelist;
1096 if (engine->class != RENDER_CLASS)
1099 gen9_whitelist_build(w);
1101 /* WaDisableLSQCROPERFforOCL:kbl */
1102 whitelist_reg(w, GEN8_L3SQCREG4);
1105 static void glk_whitelist_build(struct intel_engine_cs *engine)
1107 struct i915_wa_list *w = &engine->whitelist;
1109 if (engine->class != RENDER_CLASS)
1112 gen9_whitelist_build(w);
1114 /* WA #0862: Userspace has to set "Barrier Mode" to avoid hangs. */
1115 whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1);
1118 static void cfl_whitelist_build(struct intel_engine_cs *engine)
1120 struct i915_wa_list *w = &engine->whitelist;
1122 if (engine->class != RENDER_CLASS)
1125 gen9_whitelist_build(w);
1128 * WaAllowPMDepthAndInvocationCountAccessFromUMD:cfl,whl,cml,aml
1130 * This covers 4 register which are next to one another :
1131 * - PS_INVOCATION_COUNT
1132 * - PS_INVOCATION_COUNT_UDW
1134 * - PS_DEPTH_COUNT_UDW
1136 whitelist_reg_ext(w, PS_INVOCATION_COUNT,
1137 RING_FORCE_TO_NONPRIV_ACCESS_RD |
1138 RING_FORCE_TO_NONPRIV_RANGE_4);
1141 static void cnl_whitelist_build(struct intel_engine_cs *engine)
1143 struct i915_wa_list *w = &engine->whitelist;
1145 if (engine->class != RENDER_CLASS)
1148 /* WaEnablePreemptionGranularityControlByUMD:cnl */
1149 whitelist_reg(w, GEN8_CS_CHICKEN1);
1152 static void icl_whitelist_build(struct intel_engine_cs *engine)
1154 struct i915_wa_list *w = &engine->whitelist;
1156 switch (engine->class) {
1158 /* WaAllowUMDToModifyHalfSliceChicken7:icl */
1159 whitelist_reg(w, GEN9_HALF_SLICE_CHICKEN7);
1161 /* WaAllowUMDToModifySamplerMode:icl */
1162 whitelist_reg(w, GEN10_SAMPLER_MODE);
1164 /* WaEnableStateCacheRedirectToCS:icl */
1165 whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1);
1168 * WaAllowPMDepthAndInvocationCountAccessFromUMD:icl
1170 * This covers 4 register which are next to one another :
1171 * - PS_INVOCATION_COUNT
1172 * - PS_INVOCATION_COUNT_UDW
1174 * - PS_DEPTH_COUNT_UDW
1176 whitelist_reg_ext(w, PS_INVOCATION_COUNT,
1177 RING_FORCE_TO_NONPRIV_ACCESS_RD |
1178 RING_FORCE_TO_NONPRIV_RANGE_4);
1181 case VIDEO_DECODE_CLASS:
1182 /* hucStatusRegOffset */
1183 whitelist_reg_ext(w, _MMIO(0x2000 + engine->mmio_base),
1184 RING_FORCE_TO_NONPRIV_ACCESS_RD);
1185 /* hucUKernelHdrInfoRegOffset */
1186 whitelist_reg_ext(w, _MMIO(0x2014 + engine->mmio_base),
1187 RING_FORCE_TO_NONPRIV_ACCESS_RD);
1188 /* hucStatus2RegOffset */
1189 whitelist_reg_ext(w, _MMIO(0x23B0 + engine->mmio_base),
1190 RING_FORCE_TO_NONPRIV_ACCESS_RD);
1198 static void tgl_whitelist_build(struct intel_engine_cs *engine)
1202 void intel_engine_init_whitelist(struct intel_engine_cs *engine)
1204 struct drm_i915_private *i915 = engine->i915;
1205 struct i915_wa_list *w = &engine->whitelist;
1207 wa_init_start(w, "whitelist", engine->name);
1209 if (IS_GEN(i915, 12))
1210 tgl_whitelist_build(engine);
1211 else if (IS_GEN(i915, 11))
1212 icl_whitelist_build(engine);
1213 else if (IS_CANNONLAKE(i915))
1214 cnl_whitelist_build(engine);
1215 else if (IS_COFFEELAKE(i915))
1216 cfl_whitelist_build(engine);
1217 else if (IS_GEMINILAKE(i915))
1218 glk_whitelist_build(engine);
1219 else if (IS_KABYLAKE(i915))
1220 kbl_whitelist_build(engine);
1221 else if (IS_BROXTON(i915))
1222 bxt_whitelist_build(engine);
1223 else if (IS_SKYLAKE(i915))
1224 skl_whitelist_build(engine);
1225 else if (INTEL_GEN(i915) <= 8)
1228 MISSING_CASE(INTEL_GEN(i915));
1233 void intel_engine_apply_whitelist(struct intel_engine_cs *engine)
1235 const struct i915_wa_list *wal = &engine->whitelist;
1236 struct intel_uncore *uncore = engine->uncore;
1237 const u32 base = engine->mmio_base;
1244 for (i = 0, wa = wal->list; i < wal->count; i++, wa++)
1245 intel_uncore_write(uncore,
1246 RING_FORCE_TO_NONPRIV(base, i),
1247 i915_mmio_reg_offset(wa->reg));
1249 /* And clear the rest just in case of garbage */
1250 for (; i < RING_MAX_NONPRIV_SLOTS; i++)
1251 intel_uncore_write(uncore,
1252 RING_FORCE_TO_NONPRIV(base, i),
1253 i915_mmio_reg_offset(RING_NOPID(base)));
1257 rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
1259 struct drm_i915_private *i915 = engine->i915;
1261 if (IS_GEN(i915, 11)) {
1262 /* This is not an Wa. Enable for better image quality */
1265 _3D_CHICKEN3_AA_LINE_QUALITY_FIX_ENABLE);
1267 /* WaPipelineFlushCoherentLines:icl */
1270 GEN8_LQSC_FLUSH_COHERENT_LINES);
1274 * Formerly known as WaGAPZPriorityScheme
1278 GEN11_ARBITRATION_PRIO_ORDER_MASK);
1282 * Formerly known as WaL3BankAddressHashing
1284 wa_write_masked_or(wal,
1286 GEN11_HASH_CTRL_EXCL_MASK,
1287 GEN11_HASH_CTRL_EXCL_BIT0);
1288 wa_write_masked_or(wal,
1290 GEN11_BANK_HASH_ADDR_EXCL_MASK,
1291 GEN11_BANK_HASH_ADDR_EXCL_BIT0);
1295 * Formerly known as WaDisableCleanEvicts
1299 GEN11_LQSC_CLEAN_EVICT_DISABLE);
1301 /* WaForwardProgressSoftReset:icl */
1303 GEN10_SCRATCH_LNCF2,
1304 PMFLUSHDONE_LNICRSDROP |
1305 PMFLUSH_GAPL3UNBLOCK |
1306 PMFLUSHDONE_LNEBLK);
1308 /* Wa_1406609255:icl (pre-prod) */
1309 if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0))
1312 GEN7_DISABLE_DEMAND_PREFETCH);
1314 /* Wa_1606682166:icl */
1317 GEN7_DISABLE_SAMPLER_PREFETCH);
1319 /* Wa_1409178092:icl */
1320 wa_write_masked_or(wal,
1322 GEN11_COHERENT_PARTIAL_WRITE_MERGE_ENABLE,
1326 if (IS_GEN_RANGE(i915, 9, 11)) {
1327 /* FtrPerCtxtPreemptionGranularityControl:skl,bxt,kbl,cfl,cnl,icl */
1329 GEN7_FF_SLICE_CS_CHICKEN1,
1330 GEN9_FFSC_PERCTX_PREEMPT_CTRL);
1333 if (IS_SKYLAKE(i915) || IS_KABYLAKE(i915) || IS_COFFEELAKE(i915)) {
1334 /* WaEnableGapsTsvCreditFix:skl,kbl,cfl */
1337 GEN9_GAPS_TSV_CREDIT_DISABLE);
1340 if (IS_BROXTON(i915)) {
1341 /* WaDisablePooledEuLoadBalancingFix:bxt */
1343 FF_SLICE_CS_CHICKEN2,
1344 GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE);
1347 if (IS_GEN(i915, 9)) {
1348 /* WaContextSwitchWithConcurrentTLBInvalidate:skl,bxt,kbl,glk,cfl */
1350 GEN9_CSFE_CHICKEN1_RCS,
1351 GEN9_PREEMPT_GPGPU_SYNC_SWITCH_DISABLE);
1353 /* WaEnableLbsSlaRetryTimerDecrement:skl,bxt,kbl,glk,cfl */
1356 GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE);
1358 /* WaProgramL3SqcReg1DefaultForPerf:bxt,glk */
1359 if (IS_GEN9_LP(i915))
1360 wa_write_masked_or(wal,
1362 L3_PRIO_CREDITS_MASK,
1363 L3_GENERAL_PRIO_CREDITS(62) |
1364 L3_HIGH_PRIO_CREDITS(2));
1366 /* WaOCLCoherentLineFlush:skl,bxt,kbl,cfl */
1369 GEN8_LQSC_FLUSH_COHERENT_LINES);
1374 xcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
1376 struct drm_i915_private *i915 = engine->i915;
1378 /* WaKBLVECSSemaphoreWaitPoll:kbl */
1379 if (IS_KBL_REVID(i915, KBL_REVID_A0, KBL_REVID_E0)) {
1381 RING_SEMA_WAIT_POLL(engine->mmio_base),
1387 engine_init_workarounds(struct intel_engine_cs *engine, struct i915_wa_list *wal)
1389 if (I915_SELFTEST_ONLY(INTEL_GEN(engine->i915) < 8))
1392 if (engine->class == RENDER_CLASS)
1393 rcs_engine_wa_init(engine, wal);
1395 xcs_engine_wa_init(engine, wal);
1398 void intel_engine_init_workarounds(struct intel_engine_cs *engine)
1400 struct i915_wa_list *wal = &engine->wa_list;
1402 if (INTEL_GEN(engine->i915) < 8)
1405 wa_init_start(wal, "engine", engine->name);
1406 engine_init_workarounds(engine, wal);
1407 wa_init_finish(wal);
1410 void intel_engine_apply_workarounds(struct intel_engine_cs *engine)
1412 wa_list_apply(engine->uncore, &engine->wa_list);
1415 static struct i915_vma *
1416 create_scratch(struct i915_address_space *vm, int count)
1418 struct drm_i915_gem_object *obj;
1419 struct i915_vma *vma;
1423 size = round_up(count * sizeof(u32), PAGE_SIZE);
1424 obj = i915_gem_object_create_internal(vm->i915, size);
1426 return ERR_CAST(obj);
1428 i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
1430 vma = i915_vma_instance(obj, vm, NULL);
1436 err = i915_vma_pin(vma, 0, 0,
1437 i915_vma_is_ggtt(vma) ? PIN_GLOBAL : PIN_USER);
1444 i915_gem_object_put(obj);
1445 return ERR_PTR(err);
1448 static bool mcr_range(struct drm_i915_private *i915, u32 offset)
1451 * Registers in this range are affected by the MCR selector
1452 * which only controls CPU initiated MMIO. Routing does not
1453 * work for CS access so we cannot verify them on this path.
1455 if (INTEL_GEN(i915) >= 8 && (offset >= 0xb100 && offset <= 0xb3ff))
1462 wa_list_srm(struct i915_request *rq,
1463 const struct i915_wa_list *wal,
1464 struct i915_vma *vma)
1466 struct drm_i915_private *i915 = rq->i915;
1467 unsigned int i, count = 0;
1468 const struct i915_wa *wa;
1471 srm = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT;
1472 if (INTEL_GEN(i915) >= 8)
1475 for (i = 0, wa = wal->list; i < wal->count; i++, wa++) {
1476 if (!mcr_range(i915, i915_mmio_reg_offset(wa->reg)))
1480 cs = intel_ring_begin(rq, 4 * count);
1484 for (i = 0, wa = wal->list; i < wal->count; i++, wa++) {
1485 u32 offset = i915_mmio_reg_offset(wa->reg);
1487 if (mcr_range(i915, offset))
1492 *cs++ = i915_ggtt_offset(vma) + sizeof(u32) * i;
1495 intel_ring_advance(rq, cs);
1500 static int engine_wa_list_verify(struct intel_context *ce,
1501 const struct i915_wa_list * const wal,
1504 const struct i915_wa *wa;
1505 struct i915_request *rq;
1506 struct i915_vma *vma;
1514 vma = create_scratch(&ce->engine->gt->ggtt->vm, wal->count);
1516 return PTR_ERR(vma);
1518 rq = intel_context_create_request(ce);
1524 err = wa_list_srm(rq, wal, vma);
1528 i915_request_add(rq);
1529 if (i915_request_wait(rq, 0, HZ / 5) < 0) {
1534 results = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
1535 if (IS_ERR(results)) {
1536 err = PTR_ERR(results);
1541 for (i = 0, wa = wal->list; i < wal->count; i++, wa++) {
1542 if (mcr_range(rq->i915, i915_mmio_reg_offset(wa->reg)))
1545 if (!wa_verify(wa, results[i], wal->name, from))
1549 i915_gem_object_unpin_map(vma->obj);
1552 i915_vma_unpin(vma);
1557 int intel_engine_verify_workarounds(struct intel_engine_cs *engine,
1560 return engine_wa_list_verify(engine->kernel_context,
1565 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
1566 #include "selftest_workarounds.c"