/* * SPDX-License-Identifier: MIT * * Copyright © 2014-2018 Intel Corporation */ #include "i915_drv.h" #include "intel_workarounds.h" /** * DOC: Hardware workarounds * * This file is intended as a central place to implement most [1]_ of the * required workarounds for hardware to work as originally intended. They fall * in five basic categories depending on how/when they are applied: * * - Workarounds that touch registers that are saved/restored to/from the HW * context image. The list is emitted (via Load Register Immediate commands) * everytime a new context is created. * - GT workarounds. The list of these WAs is applied whenever these registers * revert to default values (on GPU reset, suspend/resume [2]_, etc..). * - Display workarounds. The list is applied during display clock-gating * initialization. * - Workarounds that whitelist a privileged register, so that UMDs can manage * them directly. This is just a special case of a MMMIO workaround (as we * write the list of these to/be-whitelisted registers to some special HW * registers). * - Workaround batchbuffers, that get executed automatically by the hardware * on every HW context restore. * * .. [1] Please notice that there are other WAs that, due to their nature, * cannot be applied from a central place. Those are peppered around the rest * of the code, as needed. * * .. [2] Technically, some registers are powercontext saved & restored, so they * survive a suspend/resume. In practice, writing them again is not too * costly and simplifies things. We can revisit this in the future. * * Layout * '''''' * * Keep things in this file ordered by WA type, as per the above (context, GT, * display, register whitelist, batchbuffer). Then, inside each type, keep the * following order: * * - Infrastructure functions and macros * - WAs per platform in standard gen/chrono order * - Public functions to init or apply the given workaround type. */ static void wa_init_start(struct i915_wa_list *wal, const char *name) { wal->name = name; } #define WA_LIST_CHUNK (1 << 4) static void wa_init_finish(struct i915_wa_list *wal) { /* Trim unused entries. */ if (!IS_ALIGNED(wal->count, WA_LIST_CHUNK)) { struct i915_wa *list = kmemdup(wal->list, wal->count * sizeof(*list), GFP_KERNEL); if (list) { kfree(wal->list); wal->list = list; } } if (!wal->count) return; DRM_DEBUG_DRIVER("Initialized %u %s workarounds\n", wal->wa_count, wal->name); } static void _wa_add(struct i915_wa_list *wal, const struct i915_wa *wa) { unsigned int addr = i915_mmio_reg_offset(wa->reg); unsigned int start = 0, end = wal->count; const unsigned int grow = WA_LIST_CHUNK; struct i915_wa *wa_; GEM_BUG_ON(!is_power_of_2(grow)); if (IS_ALIGNED(wal->count, grow)) { /* Either uninitialized or full. */ struct i915_wa *list; list = kmalloc_array(ALIGN(wal->count + 1, grow), sizeof(*wa), GFP_KERNEL); if (!list) { DRM_ERROR("No space for workaround init!\n"); return; } if (wal->list) memcpy(list, wal->list, sizeof(*wa) * wal->count); wal->list = list; } while (start < end) { unsigned int mid = start + (end - start) / 2; if (i915_mmio_reg_offset(wal->list[mid].reg) < addr) { start = mid + 1; } else if (i915_mmio_reg_offset(wal->list[mid].reg) > addr) { end = mid; } else { wa_ = &wal->list[mid]; if ((wa->mask & ~wa_->mask) == 0) { DRM_ERROR("Discarding overwritten w/a for reg %04x (mask: %08x, value: %08x)\n", i915_mmio_reg_offset(wa_->reg), wa_->mask, wa_->val); wa_->val &= ~wa->mask; } wal->wa_count++; wa_->val |= wa->val; wa_->mask |= wa->mask; return; } } wal->wa_count++; wa_ = &wal->list[wal->count++]; *wa_ = *wa; while (wa_-- > wal->list) { GEM_BUG_ON(i915_mmio_reg_offset(wa_[0].reg) == i915_mmio_reg_offset(wa_[1].reg)); if (i915_mmio_reg_offset(wa_[1].reg) > i915_mmio_reg_offset(wa_[0].reg)) break; swap(wa_[1], wa_[0]); } } static void wa_write_masked_or(struct i915_wa_list *wal, i915_reg_t reg, u32 mask, u32 val) { struct i915_wa wa = { .reg = reg, .mask = mask, .val = val }; _wa_add(wal, &wa); } static void wa_masked_en(struct i915_wa_list *wal, i915_reg_t reg, u32 val) { wa_write_masked_or(wal, reg, val, _MASKED_BIT_ENABLE(val)); } static void wa_write(struct i915_wa_list *wal, i915_reg_t reg, u32 val) { wa_write_masked_or(wal, reg, ~0, val); } static void wa_write_or(struct i915_wa_list *wal, i915_reg_t reg, u32 val) { wa_write_masked_or(wal, reg, val, val); } #define WA_SET_BIT_MASKED(addr, mask) \ wa_write_masked_or(wal, (addr), (mask), _MASKED_BIT_ENABLE(mask)) #define WA_CLR_BIT_MASKED(addr, mask) \ wa_write_masked_or(wal, (addr), (mask), _MASKED_BIT_DISABLE(mask)) #define WA_SET_FIELD_MASKED(addr, mask, value) \ wa_write_masked_or(wal, (addr), (mask), _MASKED_FIELD((mask), (value))) static void gen8_ctx_workarounds_init(struct intel_engine_cs *engine) { struct i915_wa_list *wal = &engine->ctx_wa_list; WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING); /* WaDisableAsyncFlipPerfMode:bdw,chv */ WA_SET_BIT_MASKED(MI_MODE, ASYNC_FLIP_PERF_DISABLE); /* WaDisablePartialInstShootdown:bdw,chv */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE); /* Use Force Non-Coherent whenever executing a 3D context. This is a * workaround for for a possible hang in the unlikely event a TLB * invalidation occurs during a PSD flush. */ /* WaForceEnableNonCoherent:bdw,chv */ /* WaHdcDisableFetchWhenMasked:bdw,chv */ WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_DONOT_FETCH_MEM_WHEN_MASKED | HDC_FORCE_NON_COHERENT); /* From the Haswell PRM, Command Reference: Registers, CACHE_MODE_0: * "The Hierarchical Z RAW Stall Optimization allows non-overlapping * polygons in the same 8x4 pixel/sample area to be processed without * stalling waiting for the earlier ones to write to Hierarchical Z * buffer." * * This optimization is off by default for BDW and CHV; turn it on. */ WA_CLR_BIT_MASKED(CACHE_MODE_0_GEN7, HIZ_RAW_STALL_OPT_DISABLE); /* Wa4x4STCOptimizationDisable:bdw,chv */ WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE); /* * BSpec recommends 8x4 when MSAA is used, * however in practice 16x4 seems fastest. * * Note that PS/WM thread counts depend on the WIZ hashing * disable bit, which we don't touch here, but it's good * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM). */ WA_SET_FIELD_MASKED(GEN7_GT_MODE, GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4); } static void bdw_ctx_workarounds_init(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; gen8_ctx_workarounds_init(engine); /* WaDisableThreadStallDopClockGating:bdw (pre-production) */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); /* WaDisableDopClockGating:bdw * * Also see the related UCGTCL1 write in broadwell_init_clock_gating() * to disable EUTC clock gating. */ WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, DOP_CLOCK_GATING_DISABLE); WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, GEN8_SAMPLER_POWER_BYPASS_DIS); WA_SET_BIT_MASKED(HDC_CHICKEN0, /* WaForceContextSaveRestoreNonCoherent:bdw */ HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT | /* WaDisableFenceDestinationToSLM:bdw (pre-prod) */ (IS_BDW_GT3(i915) ? HDC_FENCE_DEST_SLM_DISABLE : 0)); } static void chv_ctx_workarounds_init(struct intel_engine_cs *engine) { struct i915_wa_list *wal = &engine->ctx_wa_list; gen8_ctx_workarounds_init(engine); /* WaDisableThreadStallDopClockGating:chv */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); /* Improve HiZ throughput on CHV. */ WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X); } static void gen9_ctx_workarounds_init(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; if (HAS_LLC(i915)) { /* WaCompressedResourceSamplerPbeMediaNewHashMode:skl,kbl * * Must match Display Engine. See * WaCompressedResourceDisplayNewHashMode. */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN9_PBE_COMPRESSED_HASH_SELECTION); WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, GEN9_SAMPLER_HASH_COMPRESSED_READ_ADDR); } /* WaClearFlowControlGpgpuContextSave:skl,bxt,kbl,glk,cfl */ /* WaDisablePartialInstShootdown:skl,bxt,kbl,glk,cfl */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, FLOW_CONTROL_ENABLE | PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE); /* Syncing dependencies between camera and graphics:skl,bxt,kbl */ if (!IS_COFFEELAKE(i915)) WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC); /* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk,cfl */ /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, GEN9_ENABLE_YV12_BUGFIX | GEN9_ENABLE_GPGPU_PREEMPTION); /* Wa4x4STCOptimizationDisable:skl,bxt,kbl,glk,cfl */ /* WaDisablePartialResolveInVc:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE | GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE); /* WaCcsTlbPrefetchDisable:skl,bxt,kbl,glk,cfl */ WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5, GEN9_CCS_TLB_PREFETCH_ENABLE); /* WaForceContextSaveRestoreNonCoherent:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT | HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE); /* WaForceEnableNonCoherent and WaDisableHDCInvalidation are * both tied to WaForceContextSaveRestoreNonCoherent * in some hsds for skl. We keep the tie for all gen9. The * documentation is a bit hazy and so we want to get common behaviour, * even though there is no clear evidence we would need both on kbl/bxt. * This area has been source of system hangs so we play it safe * and mimic the skl regardless of what bspec says. * * Use Force Non-Coherent whenever executing a 3D context. This * is a workaround for a possible hang in the unlikely event * a TLB invalidation occurs during a PSD flush. */ /* WaForceEnableNonCoherent:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_FORCE_NON_COHERENT); /* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt,kbl,cfl */ if (IS_SKYLAKE(i915) || IS_KABYLAKE(i915) || IS_COFFEELAKE(i915)) WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, GEN8_SAMPLER_POWER_BYPASS_DIS); /* WaDisableSTUnitPowerOptimization:skl,bxt,kbl,glk,cfl */ WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE); /* * Supporting preemption with fine-granularity requires changes in the * batch buffer programming. Since we can't break old userspace, we * need to set our default preemption level to safe value. Userspace is * still able to use more fine-grained preemption levels, since in * WaEnablePreemptionGranularityControlByUMD we're whitelisting the * per-ctx register. As such, WaDisable{3D,GPGPU}MidCmdPreemption are * not real HW workarounds, but merely a way to start using preemption * while maintaining old contract with userspace. */ /* WaDisable3DMidCmdPreemption:skl,bxt,glk,cfl,[cnl] */ WA_CLR_BIT_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_3D_OBJECT_LEVEL); /* WaDisableGPGPUMidCmdPreemption:skl,bxt,blk,cfl,[cnl] */ WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_GPGPU_LEVEL_MASK, GEN9_PREEMPT_GPGPU_COMMAND_LEVEL); /* WaClearHIZ_WM_CHICKEN3:bxt,glk */ if (IS_GEN9_LP(i915)) WA_SET_BIT_MASKED(GEN9_WM_CHICKEN3, GEN9_FACTOR_IN_CLR_VAL_HIZ); } static void skl_tune_iz_hashing(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; u8 vals[3] = { 0, 0, 0 }; unsigned int i; for (i = 0; i < 3; i++) { u8 ss; /* * Only consider slices where one, and only one, subslice has 7 * EUs */ if (!is_power_of_2(RUNTIME_INFO(i915)->sseu.subslice_7eu[i])) continue; /* * subslice_7eu[i] != 0 (because of the check above) and * ss_max == 4 (maximum number of subslices possible per slice) * * -> 0 <= ss <= 3; */ ss = ffs(RUNTIME_INFO(i915)->sseu.subslice_7eu[i]) - 1; vals[i] = 3 - ss; } if (vals[0] == 0 && vals[1] == 0 && vals[2] == 0) return; /* Tune IZ hashing. See intel_device_info_runtime_init() */ WA_SET_FIELD_MASKED(GEN7_GT_MODE, GEN9_IZ_HASHING_MASK(2) | GEN9_IZ_HASHING_MASK(1) | GEN9_IZ_HASHING_MASK(0), GEN9_IZ_HASHING(2, vals[2]) | GEN9_IZ_HASHING(1, vals[1]) | GEN9_IZ_HASHING(0, vals[0])); } static void skl_ctx_workarounds_init(struct intel_engine_cs *engine) { gen9_ctx_workarounds_init(engine); skl_tune_iz_hashing(engine); } static void bxt_ctx_workarounds_init(struct intel_engine_cs *engine) { struct i915_wa_list *wal = &engine->ctx_wa_list; gen9_ctx_workarounds_init(engine); /* WaDisableThreadStallDopClockGating:bxt */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); /* WaToEnableHwFixForPushConstHWBug:bxt */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); } static void kbl_ctx_workarounds_init(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; gen9_ctx_workarounds_init(engine); /* WaToEnableHwFixForPushConstHWBug:kbl */ if (IS_KBL_REVID(i915, KBL_REVID_C0, REVID_FOREVER)) WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaDisableSbeCacheDispatchPortSharing:kbl */ WA_SET_BIT_MASKED(GEN7_HALF_SLICE_CHICKEN1, GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); } static void glk_ctx_workarounds_init(struct intel_engine_cs *engine) { struct i915_wa_list *wal = &engine->ctx_wa_list; gen9_ctx_workarounds_init(engine); /* WaToEnableHwFixForPushConstHWBug:glk */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); } static void cfl_ctx_workarounds_init(struct intel_engine_cs *engine) { struct i915_wa_list *wal = &engine->ctx_wa_list; gen9_ctx_workarounds_init(engine); /* WaToEnableHwFixForPushConstHWBug:cfl */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaDisableSbeCacheDispatchPortSharing:cfl */ WA_SET_BIT_MASKED(GEN7_HALF_SLICE_CHICKEN1, GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); } static void cnl_ctx_workarounds_init(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; /* WaForceContextSaveRestoreNonCoherent:cnl */ WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0, HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT); /* WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod) */ if (IS_CNL_REVID(i915, CNL_REVID_B0, CNL_REVID_B0)) WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, THROTTLE_12_5); /* WaDisableReplayBufferBankArbitrationOptimization:cnl */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaDisableEnhancedSBEVertexCaching:cnl (pre-prod) */ if (IS_CNL_REVID(i915, 0, CNL_REVID_B0)) WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE); /* WaPushConstantDereferenceHoldDisable:cnl */ WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE); /* FtrEnableFastAnisoL1BankingFix:cnl */ WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, CNL_FAST_ANISO_L1_BANKING_FIX); /* WaDisable3DMidCmdPreemption:cnl */ WA_CLR_BIT_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_3D_OBJECT_LEVEL); /* WaDisableGPGPUMidCmdPreemption:cnl */ WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_GPGPU_LEVEL_MASK, GEN9_PREEMPT_GPGPU_COMMAND_LEVEL); /* WaDisableEarlyEOT:cnl */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, DISABLE_EARLY_EOT); } static void icl_ctx_workarounds_init(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; /* Wa_1604370585:icl (pre-prod) * Formerly known as WaPushConstantDereferenceHoldDisable */ if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0)) WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE); /* WaForceEnableNonCoherent:icl * This is not the same workaround as in early Gen9 platforms, where * lacking this could cause system hangs, but coherency performance * overhead is high and only a few compute workloads really need it * (the register is whitelisted in hardware now, so UMDs can opt in * for coherency if they have a good reason). */ WA_SET_BIT_MASKED(ICL_HDC_MODE, HDC_FORCE_NON_COHERENT); /* Wa_2006611047:icl (pre-prod) * Formerly known as WaDisableImprovedTdlClkGating */ if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_A0)) WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, GEN11_TDL_CLOCK_GATING_FIX_DISABLE); /* Wa_2006665173:icl (pre-prod) */ if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_A0)) WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3, GEN11_BLEND_EMB_FIX_DISABLE_IN_RCC); /* WaEnableFloatBlendOptimization:icl */ wa_write_masked_or(wal, GEN10_CACHE_MODE_SS, 0, /* write-only, so skip validation */ _MASKED_BIT_ENABLE(FLOAT_BLEND_OPTIMIZATION_ENABLE)); /* WaDisableGPGPUMidThreadPreemption:icl */ WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_GPGPU_LEVEL_MASK, GEN9_PREEMPT_GPGPU_THREAD_GROUP_LEVEL); } void intel_engine_init_ctx_wa(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *wal = &engine->ctx_wa_list; wa_init_start(wal, "context"); if (IS_GEN(i915, 11)) icl_ctx_workarounds_init(engine); else if (IS_CANNONLAKE(i915)) cnl_ctx_workarounds_init(engine); else if (IS_COFFEELAKE(i915)) cfl_ctx_workarounds_init(engine); else if (IS_GEMINILAKE(i915)) glk_ctx_workarounds_init(engine); else if (IS_KABYLAKE(i915)) kbl_ctx_workarounds_init(engine); else if (IS_BROXTON(i915)) bxt_ctx_workarounds_init(engine); else if (IS_SKYLAKE(i915)) skl_ctx_workarounds_init(engine); else if (IS_CHERRYVIEW(i915)) chv_ctx_workarounds_init(engine); else if (IS_BROADWELL(i915)) bdw_ctx_workarounds_init(engine); else if (INTEL_GEN(i915) < 8) return; else MISSING_CASE(INTEL_GEN(i915)); wa_init_finish(wal); } int intel_engine_emit_ctx_wa(struct i915_request *rq) { struct i915_wa_list *wal = &rq->engine->ctx_wa_list; struct i915_wa *wa; unsigned int i; u32 *cs; int ret; if (wal->count == 0) return 0; ret = rq->engine->emit_flush(rq, EMIT_BARRIER); if (ret) return ret; cs = intel_ring_begin(rq, (wal->count * 2 + 2)); if (IS_ERR(cs)) return PTR_ERR(cs); *cs++ = MI_LOAD_REGISTER_IMM(wal->count); for (i = 0, wa = wal->list; i < wal->count; i++, wa++) { *cs++ = i915_mmio_reg_offset(wa->reg); *cs++ = wa->val; } *cs++ = MI_NOOP; intel_ring_advance(rq, cs); ret = rq->engine->emit_flush(rq, EMIT_BARRIER); if (ret) return ret; return 0; } static void gen9_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { /* WaDisableKillLogic:bxt,skl,kbl */ if (!IS_COFFEELAKE(i915)) wa_write_or(wal, GAM_ECOCHK, ECOCHK_DIS_TLB); if (HAS_LLC(i915)) { /* WaCompressedResourceSamplerPbeMediaNewHashMode:skl,kbl * * Must match Display Engine. See * WaCompressedResourceDisplayNewHashMode. */ wa_write_or(wal, MMCD_MISC_CTRL, MMCD_PCLA | MMCD_HOTSPOT_EN); } /* WaDisableHDCInvalidation:skl,bxt,kbl,cfl */ wa_write_or(wal, GAM_ECOCHK, BDW_DISABLE_HDC_INVALIDATION); } static void skl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { gen9_gt_workarounds_init(i915, wal); /* WaDisableGafsUnitClkGating:skl */ wa_write_or(wal, GEN7_UCGCTL4, GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); /* WaInPlaceDecompressionHang:skl */ if (IS_SKL_REVID(i915, SKL_REVID_H0, REVID_FOREVER)) wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); } static void bxt_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { gen9_gt_workarounds_init(i915, wal); /* WaInPlaceDecompressionHang:bxt */ wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); } static void kbl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { gen9_gt_workarounds_init(i915, wal); /* WaDisableDynamicCreditSharing:kbl */ if (IS_KBL_REVID(i915, 0, KBL_REVID_B0)) wa_write_or(wal, GAMT_CHKN_BIT_REG, GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING); /* WaDisableGafsUnitClkGating:kbl */ wa_write_or(wal, GEN7_UCGCTL4, GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); /* WaInPlaceDecompressionHang:kbl */ wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); } static void glk_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { gen9_gt_workarounds_init(i915, wal); } static void cfl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { gen9_gt_workarounds_init(i915, wal); /* WaDisableGafsUnitClkGating:cfl */ wa_write_or(wal, GEN7_UCGCTL4, GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); /* WaInPlaceDecompressionHang:cfl */ wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); } static void wa_init_mcr(struct drm_i915_private *i915, struct i915_wa_list *wal) { const struct sseu_dev_info *sseu = &RUNTIME_INFO(i915)->sseu; u32 mcr_slice_subslice_mask; /* * WaProgramMgsrForL3BankSpecificMmioReads: cnl,icl * L3Banks could be fused off in single slice scenario. If that is * the case, we might need to program MCR select to a valid L3Bank * by default, to make sure we correctly read certain registers * later on (in the range 0xB100 - 0xB3FF). * This might be incompatible with * WaProgramMgsrForCorrectSliceSpecificMmioReads. * Fortunately, this should not happen in production hardware, so * we only assert that this is the case (instead of implementing * something more complex that requires checking the range of every * MMIO read). */ if (INTEL_GEN(i915) >= 10 && is_power_of_2(sseu->slice_mask)) { /* * read FUSE3 for enabled L3 Bank IDs, if L3 Bank matches * enabled subslice, no need to redirect MCR packet */ u32 slice = fls(sseu->slice_mask); u32 fuse3 = intel_uncore_read(&i915->uncore, GEN10_MIRROR_FUSE3); u8 ss_mask = sseu->subslice_mask[slice]; u8 enabled_mask = (ss_mask | ss_mask >> GEN10_L3BANK_PAIR_COUNT) & GEN10_L3BANK_MASK; u8 disabled_mask = fuse3 & GEN10_L3BANK_MASK; /* * Production silicon should have matched L3Bank and * subslice enabled */ WARN_ON((enabled_mask & disabled_mask) != enabled_mask); } if (INTEL_GEN(i915) >= 11) mcr_slice_subslice_mask = GEN11_MCR_SLICE_MASK | GEN11_MCR_SUBSLICE_MASK; else mcr_slice_subslice_mask = GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK; /* * WaProgramMgsrForCorrectSliceSpecificMmioReads:cnl,icl * Before any MMIO read into slice/subslice specific registers, MCR * packet control register needs to be programmed to point to any * enabled s/ss pair. Otherwise, incorrect values will be returned. * This means each subsequent MMIO read will be forwarded to an * specific s/ss combination, but this is OK since these registers * are consistent across s/ss in almost all cases. In the rare * occasions, such as INSTDONE, where this value is dependent * on s/ss combo, the read should be done with read_subslice_reg. */ wa_write_masked_or(wal, GEN8_MCR_SELECTOR, mcr_slice_subslice_mask, intel_calculate_mcr_s_ss_select(i915)); } static void cnl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { wa_init_mcr(i915, wal); /* WaDisableI2mCycleOnWRPort:cnl (pre-prod) */ if (IS_CNL_REVID(i915, CNL_REVID_B0, CNL_REVID_B0)) wa_write_or(wal, GAMT_CHKN_BIT_REG, GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT); /* WaInPlaceDecompressionHang:cnl */ wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); } static void icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { wa_init_mcr(i915, wal); /* WaInPlaceDecompressionHang:icl */ wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); /* WaModifyGamTlbPartitioning:icl */ wa_write_masked_or(wal, GEN11_GACB_PERF_CTRL, GEN11_HASH_CTRL_MASK, GEN11_HASH_CTRL_BIT0 | GEN11_HASH_CTRL_BIT4); /* Wa_1405766107:icl * Formerly known as WaCL2SFHalfMaxAlloc */ wa_write_or(wal, GEN11_LSN_UNSLCVC, GEN11_LSN_UNSLCVC_GAFS_HALF_SF_MAXALLOC | GEN11_LSN_UNSLCVC_GAFS_HALF_CL2_MAXALLOC); /* Wa_220166154:icl * Formerly known as WaDisCtxReload */ wa_write_or(wal, GEN8_GAMW_ECO_DEV_RW_IA, GAMW_ECO_DEV_CTX_RELOAD_DISABLE); /* Wa_1405779004:icl (pre-prod) */ if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_A0)) wa_write_or(wal, SLICE_UNIT_LEVEL_CLKGATE, MSCUNIT_CLKGATE_DIS); /* Wa_1406680159:icl */ wa_write_or(wal, SUBSLICE_UNIT_LEVEL_CLKGATE, GWUNIT_CLKGATE_DIS); /* Wa_1406838659:icl (pre-prod) */ if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0)) wa_write_or(wal, INF_UNIT_LEVEL_CLKGATE, CGPSF_CLKGATE_DIS); /* Wa_1406463099:icl * Formerly known as WaGamTlbPendError */ wa_write_or(wal, GAMT_CHKN_BIT_REG, GAMT_CHKN_DISABLE_L3_COH_PIPE); } static void gt_init_workarounds(struct drm_i915_private *i915, struct i915_wa_list *wal) { if (IS_GEN(i915, 11)) icl_gt_workarounds_init(i915, wal); else if (IS_CANNONLAKE(i915)) cnl_gt_workarounds_init(i915, wal); else if (IS_COFFEELAKE(i915)) cfl_gt_workarounds_init(i915, wal); else if (IS_GEMINILAKE(i915)) glk_gt_workarounds_init(i915, wal); else if (IS_KABYLAKE(i915)) kbl_gt_workarounds_init(i915, wal); else if (IS_BROXTON(i915)) bxt_gt_workarounds_init(i915, wal); else if (IS_SKYLAKE(i915)) skl_gt_workarounds_init(i915, wal); else if (INTEL_GEN(i915) <= 8) return; else MISSING_CASE(INTEL_GEN(i915)); } void intel_gt_init_workarounds(struct drm_i915_private *i915) { struct i915_wa_list *wal = &i915->gt_wa_list; wa_init_start(wal, "GT"); gt_init_workarounds(i915, wal); wa_init_finish(wal); } static enum forcewake_domains wal_get_fw_for_rmw(struct intel_uncore *uncore, const struct i915_wa_list *wal) { enum forcewake_domains fw = 0; struct i915_wa *wa; unsigned int i; for (i = 0, wa = wal->list; i < wal->count; i++, wa++) fw |= intel_uncore_forcewake_for_reg(uncore, wa->reg, FW_REG_READ | FW_REG_WRITE); return fw; } static void wa_list_apply(struct intel_uncore *uncore, const struct i915_wa_list *wal) { enum forcewake_domains fw; unsigned long flags; struct i915_wa *wa; unsigned int i; if (!wal->count) return; fw = wal_get_fw_for_rmw(uncore, wal); spin_lock_irqsave(&uncore->lock, flags); intel_uncore_forcewake_get__locked(uncore, fw); for (i = 0, wa = wal->list; i < wal->count; i++, wa++) { intel_uncore_rmw_fw(uncore, wa->reg, wa->mask, wa->val); } intel_uncore_forcewake_put__locked(uncore, fw); spin_unlock_irqrestore(&uncore->lock, flags); } void intel_gt_apply_workarounds(struct drm_i915_private *i915) { wa_list_apply(&i915->uncore, &i915->gt_wa_list); } static bool wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from) { if ((cur ^ wa->val) & wa->mask) { DRM_ERROR("%s workaround lost on %s! (%x=%x/%x, expected %x, mask=%x)\n", name, from, i915_mmio_reg_offset(wa->reg), cur, cur & wa->mask, wa->val, wa->mask); return false; } return true; } static bool wa_list_verify(struct intel_uncore *uncore, const struct i915_wa_list *wal, const char *from) { struct i915_wa *wa; unsigned int i; bool ok = true; for (i = 0, wa = wal->list; i < wal->count; i++, wa++) ok &= wa_verify(wa, intel_uncore_read(uncore, wa->reg), wal->name, from); return ok; } bool intel_gt_verify_workarounds(struct drm_i915_private *i915, const char *from) { return wa_list_verify(&i915->uncore, &i915->gt_wa_list, from); } static void whitelist_reg(struct i915_wa_list *wal, i915_reg_t reg) { struct i915_wa wa = { .reg = reg }; if (GEM_DEBUG_WARN_ON(wal->count >= RING_MAX_NONPRIV_SLOTS)) return; _wa_add(wal, &wa); } static void gen9_whitelist_build(struct i915_wa_list *w) { /* WaVFEStateAfterPipeControlwithMediaStateClear:skl,bxt,glk,cfl */ whitelist_reg(w, GEN9_CTX_PREEMPT_REG); /* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */ whitelist_reg(w, GEN8_CS_CHICKEN1); /* WaAllowUMDToModifyHDCChicken1:skl,bxt,kbl,glk,cfl */ whitelist_reg(w, GEN8_HDC_CHICKEN1); } static void skl_whitelist_build(struct i915_wa_list *w) { gen9_whitelist_build(w); /* WaDisableLSQCROPERFforOCL:skl */ whitelist_reg(w, GEN8_L3SQCREG4); } static void bxt_whitelist_build(struct i915_wa_list *w) { gen9_whitelist_build(w); } static void kbl_whitelist_build(struct i915_wa_list *w) { gen9_whitelist_build(w); /* WaDisableLSQCROPERFforOCL:kbl */ whitelist_reg(w, GEN8_L3SQCREG4); } static void glk_whitelist_build(struct i915_wa_list *w) { gen9_whitelist_build(w); /* WA #0862: Userspace has to set "Barrier Mode" to avoid hangs. */ whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1); } static void cfl_whitelist_build(struct i915_wa_list *w) { gen9_whitelist_build(w); } static void cnl_whitelist_build(struct i915_wa_list *w) { /* WaEnablePreemptionGranularityControlByUMD:cnl */ whitelist_reg(w, GEN8_CS_CHICKEN1); } static void icl_whitelist_build(struct i915_wa_list *w) { /* WaAllowUMDToModifyHalfSliceChicken7:icl */ whitelist_reg(w, GEN9_HALF_SLICE_CHICKEN7); /* WaAllowUMDToModifySamplerMode:icl */ whitelist_reg(w, GEN10_SAMPLER_MODE); /* WaEnableStateCacheRedirectToCS:icl */ whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1); } void intel_engine_init_whitelist(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *w = &engine->whitelist; GEM_BUG_ON(engine->id != RCS0); wa_init_start(w, "whitelist"); if (IS_GEN(i915, 11)) icl_whitelist_build(w); else if (IS_CANNONLAKE(i915)) cnl_whitelist_build(w); else if (IS_COFFEELAKE(i915)) cfl_whitelist_build(w); else if (IS_GEMINILAKE(i915)) glk_whitelist_build(w); else if (IS_KABYLAKE(i915)) kbl_whitelist_build(w); else if (IS_BROXTON(i915)) bxt_whitelist_build(w); else if (IS_SKYLAKE(i915)) skl_whitelist_build(w); else if (INTEL_GEN(i915) <= 8) return; else MISSING_CASE(INTEL_GEN(i915)); wa_init_finish(w); } void intel_engine_apply_whitelist(struct intel_engine_cs *engine) { const struct i915_wa_list *wal = &engine->whitelist; struct intel_uncore *uncore = engine->uncore; const u32 base = engine->mmio_base; struct i915_wa *wa; unsigned int i; if (!wal->count) return; for (i = 0, wa = wal->list; i < wal->count; i++, wa++) intel_uncore_write(uncore, RING_FORCE_TO_NONPRIV(base, i), i915_mmio_reg_offset(wa->reg)); /* And clear the rest just in case of garbage */ for (; i < RING_MAX_NONPRIV_SLOTS; i++) intel_uncore_write(uncore, RING_FORCE_TO_NONPRIV(base, i), i915_mmio_reg_offset(RING_NOPID(base))); } static void rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; if (IS_GEN(i915, 11)) { /* This is not an Wa. Enable for better image quality */ wa_masked_en(wal, _3D_CHICKEN3, _3D_CHICKEN3_AA_LINE_QUALITY_FIX_ENABLE); /* WaPipelineFlushCoherentLines:icl */ wa_write_or(wal, GEN8_L3SQCREG4, GEN8_LQSC_FLUSH_COHERENT_LINES); /* * Wa_1405543622:icl * Formerly known as WaGAPZPriorityScheme */ wa_write_or(wal, GEN8_GARBCNTL, GEN11_ARBITRATION_PRIO_ORDER_MASK); /* * Wa_1604223664:icl * Formerly known as WaL3BankAddressHashing */ wa_write_masked_or(wal, GEN8_GARBCNTL, GEN11_HASH_CTRL_EXCL_MASK, GEN11_HASH_CTRL_EXCL_BIT0); wa_write_masked_or(wal, GEN11_GLBLINVL, GEN11_BANK_HASH_ADDR_EXCL_MASK, GEN11_BANK_HASH_ADDR_EXCL_BIT0); /* * Wa_1405733216:icl * Formerly known as WaDisableCleanEvicts */ wa_write_or(wal, GEN8_L3SQCREG4, GEN11_LQSC_CLEAN_EVICT_DISABLE); /* WaForwardProgressSoftReset:icl */ wa_write_or(wal, GEN10_SCRATCH_LNCF2, PMFLUSHDONE_LNICRSDROP | PMFLUSH_GAPL3UNBLOCK | PMFLUSHDONE_LNEBLK); /* Wa_1406609255:icl (pre-prod) */ if (IS_ICL_REVID(i915, ICL_REVID_A0, ICL_REVID_B0)) wa_write_or(wal, GEN7_SARCHKMD, GEN7_DISABLE_DEMAND_PREFETCH | GEN7_DISABLE_SAMPLER_PREFETCH); } if (IS_GEN_RANGE(i915, 9, 11)) { /* FtrPerCtxtPreemptionGranularityControl:skl,bxt,kbl,cfl,cnl,icl */ wa_masked_en(wal, GEN7_FF_SLICE_CS_CHICKEN1, GEN9_FFSC_PERCTX_PREEMPT_CTRL); } if (IS_SKYLAKE(i915) || IS_KABYLAKE(i915) || IS_COFFEELAKE(i915)) { /* WaEnableGapsTsvCreditFix:skl,kbl,cfl */ wa_write_or(wal, GEN8_GARBCNTL, GEN9_GAPS_TSV_CREDIT_DISABLE); } if (IS_BROXTON(i915)) { /* WaDisablePooledEuLoadBalancingFix:bxt */ wa_masked_en(wal, FF_SLICE_CS_CHICKEN2, GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE); } if (IS_GEN(i915, 9)) { /* WaContextSwitchWithConcurrentTLBInvalidate:skl,bxt,kbl,glk,cfl */ wa_masked_en(wal, GEN9_CSFE_CHICKEN1_RCS, GEN9_PREEMPT_GPGPU_SYNC_SWITCH_DISABLE); /* WaEnableLbsSlaRetryTimerDecrement:skl,bxt,kbl,glk,cfl */ wa_write_or(wal, BDW_SCRATCH1, GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE); /* WaProgramL3SqcReg1DefaultForPerf:bxt,glk */ if (IS_GEN9_LP(i915)) wa_write_masked_or(wal, GEN8_L3SQCREG1, L3_PRIO_CREDITS_MASK, L3_GENERAL_PRIO_CREDITS(62) | L3_HIGH_PRIO_CREDITS(2)); /* WaOCLCoherentLineFlush:skl,bxt,kbl,cfl */ wa_write_or(wal, GEN8_L3SQCREG4, GEN8_LQSC_FLUSH_COHERENT_LINES); } } static void xcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; /* WaKBLVECSSemaphoreWaitPoll:kbl */ if (IS_KBL_REVID(i915, KBL_REVID_A0, KBL_REVID_E0)) { wa_write(wal, RING_SEMA_WAIT_POLL(engine->mmio_base), 1); } } static void engine_init_workarounds(struct intel_engine_cs *engine, struct i915_wa_list *wal) { if (I915_SELFTEST_ONLY(INTEL_GEN(engine->i915) < 8)) return; if (engine->id == RCS0) rcs_engine_wa_init(engine, wal); else xcs_engine_wa_init(engine, wal); } void intel_engine_init_workarounds(struct intel_engine_cs *engine) { struct i915_wa_list *wal = &engine->wa_list; if (GEM_WARN_ON(INTEL_GEN(engine->i915) < 8)) return; wa_init_start(wal, engine->name); engine_init_workarounds(engine, wal); wa_init_finish(wal); } void intel_engine_apply_workarounds(struct intel_engine_cs *engine) { wa_list_apply(engine->uncore, &engine->wa_list); } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/intel_workarounds.c" #endif