/* * SPDX-License-Identifier: MIT * * Copyright © 2014-2018 Intel Corporation */ #include "i915_drv.h" #include "intel_context.h" #include "intel_engine_pm.h" #include "intel_gt.h" #include "intel_ring.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, const char *engine_name) { wal->name = name; wal->engine_name = engine_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 on %s\n", wal->wa_count, wal->name, wal->engine_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->clr | wa_->clr) && !(wa->clr & ~wa_->clr)) { DRM_ERROR("Discarding overwritten w/a for reg %04x (clear: %08x, set: %08x)\n", i915_mmio_reg_offset(wa_->reg), wa_->clr, wa_->set); wa_->set &= ~wa->clr; } wal->wa_count++; wa_->set |= wa->set; wa_->clr |= wa->clr; wa_->read |= wa->read; 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_add(struct i915_wa_list *wal, i915_reg_t reg, u32 clear, u32 set, u32 read_mask) { struct i915_wa wa = { .reg = reg, .clr = clear, .set = set, .read = read_mask, }; _wa_add(wal, &wa); } static void wa_write_masked_or(struct i915_wa_list *wal, i915_reg_t reg, u32 clear, u32 set) { wa_add(wal, reg, clear, set, clear); } static void wa_write(struct i915_wa_list *wal, i915_reg_t reg, u32 set) { wa_write_masked_or(wal, reg, ~0, set); } static void wa_write_or(struct i915_wa_list *wal, i915_reg_t reg, u32 set) { wa_write_masked_or(wal, reg, set, set); } static void wa_masked_en(struct i915_wa_list *wal, i915_reg_t reg, u32 val) { wa_add(wal, reg, 0, _MASKED_BIT_ENABLE(val), val); } static void wa_masked_dis(struct i915_wa_list *wal, i915_reg_t reg, u32 val) { wa_add(wal, reg, 0, _MASKED_BIT_DISABLE(val), val); } #define WA_SET_BIT_MASKED(addr, mask) \ wa_masked_en(wal, (addr), (mask)) #define WA_CLR_BIT_MASKED(addr, mask) \ wa_masked_dis(wal, (addr), (mask)) #define WA_SET_FIELD_MASKED(addr, mask, value) \ wa_write_masked_or(wal, (addr), 0, _MASKED_FIELD((mask), (value))) static void gen8_ctx_workarounds_init(struct intel_engine_cs *engine, struct i915_wa_list *wal) { 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 i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; gen8_ctx_workarounds_init(engine, wal); /* WaDisableThreadStallDopClockGating:bdw (pre-production) */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); /* WaDisableDopClockGating:bdw * * Also see the related UCGTCL1 write in bdw_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) { gen8_ctx_workarounds_init(engine, wal); /* 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 i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; 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); /* 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 i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; 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, struct i915_wa_list *wal) { gen9_ctx_workarounds_init(engine, wal); skl_tune_iz_hashing(engine, wal); } static void bxt_ctx_workarounds_init(struct intel_engine_cs *engine, struct i915_wa_list *wal) { gen9_ctx_workarounds_init(engine, wal); /* 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 i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; gen9_ctx_workarounds_init(engine, wal); /* 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) { gen9_ctx_workarounds_init(engine, wal); /* 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) { gen9_ctx_workarounds_init(engine, wal); /* 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 i915_wa_list *wal) { /* WaForceContextSaveRestoreNonCoherent:cnl */ WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0, HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT); /* WaDisableReplayBufferBankArbitrationOptimization:cnl */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* 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 i915_wa_list *wal) { struct drm_i915_private *i915 = engine->i915; /* WaDisableBankHangMode:icl */ wa_write(wal, GEN8_L3CNTLREG, intel_uncore_read(engine->uncore, GEN8_L3CNTLREG) | GEN8_ERRDETBCTRL); /* 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); /* allow headerless messages for preemptible GPGPU context */ WA_SET_BIT_MASKED(GEN10_SAMPLER_MODE, GEN11_SAMPLER_ENABLE_HEADLESS_MSG); /* Wa_1604278689:icl,ehl */ wa_write(wal, IVB_FBC_RT_BASE, 0xFFFFFFFF & ~ILK_FBC_RT_VALID); wa_write_masked_or(wal, IVB_FBC_RT_BASE_UPPER, 0, /* write-only register; skip validation */ 0xFFFFFFFF); /* Wa_1406306137:icl,ehl */ wa_masked_en(wal, GEN9_ROW_CHICKEN4, GEN11_DIS_PICK_2ND_EU); } static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine, struct i915_wa_list *wal) { /* * Wa_1409142259:tgl * Wa_1409347922:tgl * Wa_1409252684:tgl * Wa_1409217633:tgl * Wa_1409207793:tgl * Wa_1409178076:tgl * Wa_1408979724:tgl */ WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3, GEN12_DISABLE_CPS_AWARE_COLOR_PIPE); /* * Wa_1604555607:gen12 and Wa_1608008084:gen12 * FF_MODE2 register will return the wrong value when read. The default * value for this register is zero for all fields and there are no bit * masks. So instead of doing a RMW we should just write the TDS timer * value for Wa_1604555607. */ wa_add(wal, FF_MODE2, FF_MODE2_TDS_TIMER_MASK, FF_MODE2_TDS_TIMER_128, 0); /* WaDisableGPGPUMidThreadPreemption:tgl */ WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_GPGPU_LEVEL_MASK, GEN9_PREEMPT_GPGPU_THREAD_GROUP_LEVEL); } static void __intel_engine_init_ctx_wa(struct intel_engine_cs *engine, struct i915_wa_list *wal, const char *name) { struct drm_i915_private *i915 = engine->i915; if (engine->class != RENDER_CLASS) return; wa_init_start(wal, name, engine->name); if (IS_GEN(i915, 12)) tgl_ctx_workarounds_init(engine, wal); else if (IS_GEN(i915, 11)) icl_ctx_workarounds_init(engine, wal); else if (IS_CANNONLAKE(i915)) cnl_ctx_workarounds_init(engine, wal); else if (IS_COFFEELAKE(i915)) cfl_ctx_workarounds_init(engine, wal); else if (IS_GEMINILAKE(i915)) glk_ctx_workarounds_init(engine, wal); else if (IS_KABYLAKE(i915)) kbl_ctx_workarounds_init(engine, wal); else if (IS_BROXTON(i915)) bxt_ctx_workarounds_init(engine, wal); else if (IS_SKYLAKE(i915)) skl_ctx_workarounds_init(engine, wal); else if (IS_CHERRYVIEW(i915)) chv_ctx_workarounds_init(engine, wal); else if (IS_BROADWELL(i915)) bdw_ctx_workarounds_init(engine, wal); else if (INTEL_GEN(i915) < 8) return; else MISSING_CASE(INTEL_GEN(i915)); wa_init_finish(wal); } void intel_engine_init_ctx_wa(struct intel_engine_cs *engine) { __intel_engine_init_ctx_wa(engine, &engine->ctx_wa_list, "context"); } 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->set; } *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; unsigned int slice, subslice; u32 l3_en, mcr, mcr_mask; GEM_BUG_ON(INTEL_GEN(i915) < 10); /* * 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). * * 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. * * Since GEN8_MCR_SELECTOR contains dual-purpose bits which select both * to which subslice, or to which L3 bank, the respective mmio reads * will go, we have to find a common index which works for both * accesses. * * Case where we cannot find a common index fortunately should not * happen in production hardware, so we only emit a warning 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)) { u32 l3_fuse = intel_uncore_read(&i915->uncore, GEN10_MIRROR_FUSE3) & GEN10_L3BANK_MASK; drm_dbg(&i915->drm, "L3 fuse = %x\n", l3_fuse); l3_en = ~(l3_fuse << GEN10_L3BANK_PAIR_COUNT | l3_fuse); } else { l3_en = ~0; } slice = fls(sseu->slice_mask) - 1; subslice = fls(l3_en & intel_sseu_get_subslices(sseu, slice)); if (!subslice) { drm_warn(&i915->drm, "No common index found between subslice mask %x and L3 bank mask %x!\n", intel_sseu_get_subslices(sseu, slice), l3_en); subslice = fls(l3_en); drm_WARN_ON(&i915->drm, !subslice); } subslice--; if (INTEL_GEN(i915) >= 11) { mcr = GEN11_MCR_SLICE(slice) | GEN11_MCR_SUBSLICE(subslice); mcr_mask = GEN11_MCR_SLICE_MASK | GEN11_MCR_SUBSLICE_MASK; } else { mcr = GEN8_MCR_SLICE(slice) | GEN8_MCR_SUBSLICE(subslice); mcr_mask = GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK; } drm_dbg(&i915->drm, "MCR slice/subslice = %x\n", mcr); wa_write_masked_or(wal, GEN8_MCR_SELECTOR, mcr_mask, mcr); } static void cnl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { wa_init_mcr(i915, wal); /* 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_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); /* Wa_1607087056:icl,ehl,jsl */ if (IS_ICELAKE(i915) || IS_EHL_REVID(i915, EHL_REVID_A0, EHL_REVID_A0)) { wa_write_or(wal, SLICE_UNIT_LEVEL_CLKGATE, L3_CLKGATE_DIS | L3_CR2X_CLKGATE_DIS); } } static void tgl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) { wa_init_mcr(i915, wal); /* Wa_1409420604:tgl */ if (IS_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) wa_write_or(wal, SUBSLICE_UNIT_LEVEL_CLKGATE2, CPSSUNIT_CLKGATE_DIS); /* Wa_1607087056:tgl also know as BUG:1409180338 */ if (IS_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) wa_write_or(wal, SLICE_UNIT_LEVEL_CLKGATE, L3_CLKGATE_DIS | L3_CR2X_CLKGATE_DIS); } static void gt_init_workarounds(struct drm_i915_private *i915, struct i915_wa_list *wal) { if (IS_GEN(i915, 12)) tgl_gt_workarounds_init(i915, wal); else 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", "global"); 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 bool wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from) { if ((cur ^ wa->set) & wa->read) { DRM_ERROR("%s workaround lost on %s! (%x=%x/%x, expected %x)\n", name, from, i915_mmio_reg_offset(wa->reg), cur, cur & wa->read, wa->set); return false; } return true; } 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++) { if (wa->clr) intel_uncore_rmw_fw(uncore, wa->reg, wa->clr, wa->set); else intel_uncore_write_fw(uncore, wa->reg, wa->set); if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) wa_verify(wa, intel_uncore_read_fw(uncore, wa->reg), wal->name, "application"); } intel_uncore_forcewake_put__locked(uncore, fw); spin_unlock_irqrestore(&uncore->lock, flags); } void intel_gt_apply_workarounds(struct intel_gt *gt) { wa_list_apply(gt->uncore, >->i915->gt_wa_list); } 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 intel_gt *gt, const char *from) { return wa_list_verify(gt->uncore, >->i915->gt_wa_list, from); } static inline bool is_nonpriv_flags_valid(u32 flags) { /* Check only valid flag bits are set */ if (flags & ~RING_FORCE_TO_NONPRIV_MASK_VALID) return false; /* NB: Only 3 out of 4 enum values are valid for access field */ if ((flags & RING_FORCE_TO_NONPRIV_ACCESS_MASK) == RING_FORCE_TO_NONPRIV_ACCESS_INVALID) return false; return true; } static void whitelist_reg_ext(struct i915_wa_list *wal, i915_reg_t reg, u32 flags) { struct i915_wa wa = { .reg = reg }; if (GEM_DEBUG_WARN_ON(wal->count >= RING_MAX_NONPRIV_SLOTS)) return; if (GEM_DEBUG_WARN_ON(!is_nonpriv_flags_valid(flags))) return; wa.reg.reg |= flags; _wa_add(wal, &wa); } static void whitelist_reg(struct i915_wa_list *wal, i915_reg_t reg) { whitelist_reg_ext(wal, reg, RING_FORCE_TO_NONPRIV_ACCESS_RW); } 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); /* WaSendPushConstantsFromMMIO:skl,bxt */ whitelist_reg(w, COMMON_SLICE_CHICKEN2); } static void skl_whitelist_build(struct intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; if (engine->class != RENDER_CLASS) return; gen9_whitelist_build(w); /* WaDisableLSQCROPERFforOCL:skl */ whitelist_reg(w, GEN8_L3SQCREG4); } static void bxt_whitelist_build(struct intel_engine_cs *engine) { if (engine->class != RENDER_CLASS) return; gen9_whitelist_build(&engine->whitelist); } static void kbl_whitelist_build(struct intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; if (engine->class != RENDER_CLASS) return; gen9_whitelist_build(w); /* WaDisableLSQCROPERFforOCL:kbl */ whitelist_reg(w, GEN8_L3SQCREG4); } static void glk_whitelist_build(struct intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; if (engine->class != RENDER_CLASS) return; 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 intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; if (engine->class != RENDER_CLASS) return; gen9_whitelist_build(w); /* * WaAllowPMDepthAndInvocationCountAccessFromUMD:cfl,whl,cml,aml * * This covers 4 register which are next to one another : * - PS_INVOCATION_COUNT * - PS_INVOCATION_COUNT_UDW * - PS_DEPTH_COUNT * - PS_DEPTH_COUNT_UDW */ whitelist_reg_ext(w, PS_INVOCATION_COUNT, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4); } static void cnl_whitelist_build(struct intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; if (engine->class != RENDER_CLASS) return; /* WaEnablePreemptionGranularityControlByUMD:cnl */ whitelist_reg(w, GEN8_CS_CHICKEN1); } static void icl_whitelist_build(struct intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; switch (engine->class) { case RENDER_CLASS: /* 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); /* * WaAllowPMDepthAndInvocationCountAccessFromUMD:icl * * This covers 4 register which are next to one another : * - PS_INVOCATION_COUNT * - PS_INVOCATION_COUNT_UDW * - PS_DEPTH_COUNT * - PS_DEPTH_COUNT_UDW */ whitelist_reg_ext(w, PS_INVOCATION_COUNT, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4); break; case VIDEO_DECODE_CLASS: /* hucStatusRegOffset */ whitelist_reg_ext(w, _MMIO(0x2000 + engine->mmio_base), RING_FORCE_TO_NONPRIV_ACCESS_RD); /* hucUKernelHdrInfoRegOffset */ whitelist_reg_ext(w, _MMIO(0x2014 + engine->mmio_base), RING_FORCE_TO_NONPRIV_ACCESS_RD); /* hucStatus2RegOffset */ whitelist_reg_ext(w, _MMIO(0x23B0 + engine->mmio_base), RING_FORCE_TO_NONPRIV_ACCESS_RD); break; default: break; } } static void tgl_whitelist_build(struct intel_engine_cs *engine) { struct i915_wa_list *w = &engine->whitelist; switch (engine->class) { case RENDER_CLASS: /* * WaAllowPMDepthAndInvocationCountAccessFromUMD:tgl * Wa_1408556865:tgl * * This covers 4 registers which are next to one another : * - PS_INVOCATION_COUNT * - PS_INVOCATION_COUNT_UDW * - PS_DEPTH_COUNT * - PS_DEPTH_COUNT_UDW */ whitelist_reg_ext(w, PS_INVOCATION_COUNT, RING_FORCE_TO_NONPRIV_ACCESS_RD | RING_FORCE_TO_NONPRIV_RANGE_4); /* Wa_1808121037:tgl */ whitelist_reg(w, GEN7_COMMON_SLICE_CHICKEN1); /* Wa_1806527549:tgl */ whitelist_reg(w, HIZ_CHICKEN); break; default: break; } } void intel_engine_init_whitelist(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; struct i915_wa_list *w = &engine->whitelist; wa_init_start(w, "whitelist", engine->name); if (IS_GEN(i915, 12)) tgl_whitelist_build(engine); else if (IS_GEN(i915, 11)) icl_whitelist_build(engine); else if (IS_CANNONLAKE(i915)) cnl_whitelist_build(engine); else if (IS_COFFEELAKE(i915)) cfl_whitelist_build(engine); else if (IS_GEMINILAKE(i915)) glk_whitelist_build(engine); else if (IS_KABYLAKE(i915)) kbl_whitelist_build(engine); else if (IS_BROXTON(i915)) bxt_whitelist_build(engine); else if (IS_SKYLAKE(i915)) skl_whitelist_build(engine); 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_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) { /* * Wa_1607138336:tgl * Wa_1607063988:tgl */ wa_write_or(wal, GEN9_CTX_PREEMPT_REG, GEN12_DISABLE_POSH_BUSY_FF_DOP_CG); /* * Wa_1607030317:tgl * Wa_1607186500:tgl * Wa_1607297627:tgl there is 3 entries for this WA on BSpec, 2 * of then says it is fixed on B0 the other one says it is * permanent */ wa_masked_en(wal, GEN6_RC_SLEEP_PSMI_CONTROL, GEN12_WAIT_FOR_EVENT_POWER_DOWN_DISABLE | GEN8_RC_SEMA_IDLE_MSG_DISABLE); /* * Wa_1606679103:tgl * (see also Wa_1606682166:icl) */ wa_write_or(wal, GEN7_SARCHKMD, GEN7_DISABLE_SAMPLER_PREFETCH); /* Wa_1407928979:tgl */ wa_write_or(wal, GEN7_FF_THREAD_MODE, GEN12_FF_TESSELATION_DOP_GATE_DISABLE); /* Wa_1408615072:tgl */ wa_write_or(wal, UNSLICE_UNIT_LEVEL_CLKGATE2, VSUNIT_CLKGATE_DIS_TGL); } if (IS_TIGERLAKE(i915)) { /* Wa_1606931601:tgl */ wa_masked_en(wal, GEN7_ROW_CHICKEN2, GEN12_DISABLE_EARLY_READ); /* Wa_1409804808:tgl */ wa_masked_en(wal, GEN7_ROW_CHICKEN2, GEN12_PUSH_CONST_DEREF_HOLD_DIS); /* Wa_1606700617:tgl */ wa_masked_en(wal, GEN9_CS_DEBUG_MODE1, FF_DOP_CLOCK_GATE_DISABLE); /* * Wa_1409085225:tgl * Wa_14010229206:tgl */ wa_masked_en(wal, GEN9_ROW_CHICKEN4, GEN12_DISABLE_TDL_PUSH); } 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); /* Wa_1606682166:icl */ wa_write_or(wal, GEN7_SARCHKMD, GEN7_DISABLE_SAMPLER_PREFETCH); /* Wa_1409178092:icl */ wa_write_masked_or(wal, GEN11_SCRATCH2, GEN11_COHERENT_PARTIAL_WRITE_MERGE_ENABLE, 0); /* WaEnable32PlaneMode:icl */ wa_masked_en(wal, GEN9_CSFE_CHICKEN1_RCS, GEN11_ENABLE_32_PLANE_MODE); /* * Wa_1408615072:icl,ehl (vsunit) * Wa_1407596294:icl,ehl (hsunit) */ wa_write_or(wal, UNSLICE_UNIT_LEVEL_CLKGATE, VSUNIT_CLKGATE_DIS | HSUNIT_CLKGATE_DIS); /* Wa_1407352427:icl,ehl */ wa_write_or(wal, UNSLICE_UNIT_LEVEL_CLKGATE2, PSDUNIT_CLKGATE_DIS); /* Wa_1406680159:icl,ehl */ wa_write_or(wal, SUBSLICE_UNIT_LEVEL_CLKGATE, GWUNIT_CLKGATE_DIS); /* * Wa_1408767742:icl[a2..forever],ehl[all] * Wa_1605460711:icl[a0..c0] */ wa_write_or(wal, GEN7_FF_THREAD_MODE, GEN12_FF_TESSELATION_DOP_GATE_DISABLE); } if (IS_GEN_RANGE(i915, 9, 12)) { /* FtrPerCtxtPreemptionGranularityControl:skl,bxt,kbl,cfl,cnl,icl,tgl */ 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); } if (IS_GEN(i915, 7)) /* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */ wa_masked_en(wal, GFX_MODE_GEN7, GFX_TLB_INVALIDATE_EXPLICIT | GFX_REPLAY_MODE); if (IS_GEN_RANGE(i915, 6, 7)) /* * We need to disable the AsyncFlip performance optimisations in * order to use MI_WAIT_FOR_EVENT within the CS. It should * already be programmed to '1' on all products. * * WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv */ wa_masked_en(wal, MI_MODE, ASYNC_FLIP_PERF_DISABLE); if (IS_GEN(i915, 6)) { /* * Required for the hardware to program scanline values for * waiting * WaEnableFlushTlbInvalidationMode:snb */ wa_masked_en(wal, GFX_MODE, GFX_TLB_INVALIDATE_EXPLICIT); /* * From the Sandybridge PRM, volume 1 part 3, page 24: * "If this bit is set, STCunit will have LRA as replacement * policy. [...] This bit must be reset. LRA replacement * policy is not supported." */ wa_masked_dis(wal, CACHE_MODE_0, CM0_STC_EVICT_DISABLE_LRA_SNB); } if (IS_GEN_RANGE(i915, 4, 6)) /* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */ wa_add(wal, MI_MODE, 0, _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH), /* XXX bit doesn't stick on Broadwater */ IS_I965G(i915) ? 0 : VS_TIMER_DISPATCH); } 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) < 4)) return; if (engine->class == RENDER_CLASS) 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 (INTEL_GEN(engine->i915) < 4) return; wa_init_start(wal, "engine", 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); } static struct i915_vma * create_scratch(struct i915_address_space *vm, int count) { struct drm_i915_gem_object *obj; struct i915_vma *vma; unsigned int size; int err; size = round_up(count * sizeof(u32), PAGE_SIZE); obj = i915_gem_object_create_internal(vm->i915, size); if (IS_ERR(obj)) return ERR_CAST(obj); i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC); vma = i915_vma_instance(obj, vm, NULL); if (IS_ERR(vma)) { err = PTR_ERR(vma); goto err_obj; } err = i915_vma_pin(vma, 0, 0, i915_vma_is_ggtt(vma) ? PIN_GLOBAL : PIN_USER); if (err) goto err_obj; return vma; err_obj: i915_gem_object_put(obj); return ERR_PTR(err); } static const struct { u32 start; u32 end; } mcr_ranges_gen8[] = { { .start = 0x5500, .end = 0x55ff }, { .start = 0x7000, .end = 0x7fff }, { .start = 0x9400, .end = 0x97ff }, { .start = 0xb000, .end = 0xb3ff }, { .start = 0xe000, .end = 0xe7ff }, {}, }; static bool mcr_range(struct drm_i915_private *i915, u32 offset) { int i; if (INTEL_GEN(i915) < 8) return false; /* * Registers in these ranges are affected by the MCR selector * which only controls CPU initiated MMIO. Routing does not * work for CS access so we cannot verify them on this path. */ for (i = 0; mcr_ranges_gen8[i].start; i++) if (offset >= mcr_ranges_gen8[i].start && offset <= mcr_ranges_gen8[i].end) return true; return false; } static int wa_list_srm(struct i915_request *rq, const struct i915_wa_list *wal, struct i915_vma *vma) { struct drm_i915_private *i915 = rq->i915; unsigned int i, count = 0; const struct i915_wa *wa; u32 srm, *cs; srm = MI_STORE_REGISTER_MEM | MI_SRM_LRM_GLOBAL_GTT; if (INTEL_GEN(i915) >= 8) srm++; for (i = 0, wa = wal->list; i < wal->count; i++, wa++) { if (!mcr_range(i915, i915_mmio_reg_offset(wa->reg))) count++; } cs = intel_ring_begin(rq, 4 * count); if (IS_ERR(cs)) return PTR_ERR(cs); for (i = 0, wa = wal->list; i < wal->count; i++, wa++) { u32 offset = i915_mmio_reg_offset(wa->reg); if (mcr_range(i915, offset)) continue; *cs++ = srm; *cs++ = offset; *cs++ = i915_ggtt_offset(vma) + sizeof(u32) * i; *cs++ = 0; } intel_ring_advance(rq, cs); return 0; } static int engine_wa_list_verify(struct intel_context *ce, const struct i915_wa_list * const wal, const char *from) { const struct i915_wa *wa; struct i915_request *rq; struct i915_vma *vma; unsigned int i; u32 *results; int err; if (!wal->count) return 0; vma = create_scratch(&ce->engine->gt->ggtt->vm, wal->count); if (IS_ERR(vma)) return PTR_ERR(vma); intel_engine_pm_get(ce->engine); rq = intel_context_create_request(ce); intel_engine_pm_put(ce->engine); if (IS_ERR(rq)) { err = PTR_ERR(rq); goto err_vma; } i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, true); if (err == 0) err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE); i915_vma_unlock(vma); if (err) { i915_request_add(rq); goto err_vma; } err = wa_list_srm(rq, wal, vma); if (err) goto err_vma; i915_request_get(rq); i915_request_add(rq); if (i915_request_wait(rq, 0, HZ / 5) < 0) { err = -ETIME; goto err_rq; } results = i915_gem_object_pin_map(vma->obj, I915_MAP_WB); if (IS_ERR(results)) { err = PTR_ERR(results); goto err_rq; } err = 0; for (i = 0, wa = wal->list; i < wal->count; i++, wa++) { if (mcr_range(rq->i915, i915_mmio_reg_offset(wa->reg))) continue; if (!wa_verify(wa, results[i], wal->name, from)) err = -ENXIO; } i915_gem_object_unpin_map(vma->obj); err_rq: i915_request_put(rq); err_vma: i915_vma_unpin(vma); i915_vma_put(vma); return err; } int intel_engine_verify_workarounds(struct intel_engine_cs *engine, const char *from) { return engine_wa_list_verify(engine->kernel_context, &engine->wa_list, from); } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftest_workarounds.c" #endif