// SPDX-License-Identifier: MIT /* * Copyright © 2016 Intel Corporation */ #include #include #include "gem/i915_gem_context.h" #include "gem/i915_gem_internal.h" #include "gt/intel_gt_print.h" #include "gt/intel_gt_regs.h" #include "i915_cmd_parser.h" #include "i915_drv.h" #include "i915_irq.h" #include "i915_reg.h" #include "intel_breadcrumbs.h" #include "intel_context.h" #include "intel_engine.h" #include "intel_engine_pm.h" #include "intel_engine_regs.h" #include "intel_engine_user.h" #include "intel_execlists_submission.h" #include "intel_gt.h" #include "intel_gt_mcr.h" #include "intel_gt_pm.h" #include "intel_gt_requests.h" #include "intel_lrc.h" #include "intel_lrc_reg.h" #include "intel_reset.h" #include "intel_ring.h" #include "uc/intel_guc_submission.h" /* Haswell does have the CXT_SIZE register however it does not appear to be * valid. Now, docs explain in dwords what is in the context object. The full * size is 70720 bytes, however, the power context and execlist context will * never be saved (power context is stored elsewhere, and execlists don't work * on HSW) - so the final size, including the extra state required for the * Resource Streamer, is 66944 bytes, which rounds to 17 pages. */ #define HSW_CXT_TOTAL_SIZE (17 * PAGE_SIZE) #define DEFAULT_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE) #define GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE) #define GEN9_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE) #define GEN11_LR_CONTEXT_RENDER_SIZE (14 * PAGE_SIZE) #define GEN8_LR_CONTEXT_OTHER_SIZE (2 * PAGE_SIZE) #define MAX_MMIO_BASES 3 struct engine_info { u8 class; u8 instance; /* mmio bases table *must* be sorted in reverse graphics_ver order */ struct engine_mmio_base { u32 graphics_ver : 8; u32 base : 24; } mmio_bases[MAX_MMIO_BASES]; }; static const struct engine_info intel_engines[] = { [RCS0] = { .class = RENDER_CLASS, .instance = 0, .mmio_bases = { { .graphics_ver = 1, .base = RENDER_RING_BASE } }, }, [BCS0] = { .class = COPY_ENGINE_CLASS, .instance = 0, .mmio_bases = { { .graphics_ver = 6, .base = BLT_RING_BASE } }, }, [BCS1] = { .class = COPY_ENGINE_CLASS, .instance = 1, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS1_RING_BASE } }, }, [BCS2] = { .class = COPY_ENGINE_CLASS, .instance = 2, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS2_RING_BASE } }, }, [BCS3] = { .class = COPY_ENGINE_CLASS, .instance = 3, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS3_RING_BASE } }, }, [BCS4] = { .class = COPY_ENGINE_CLASS, .instance = 4, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS4_RING_BASE } }, }, [BCS5] = { .class = COPY_ENGINE_CLASS, .instance = 5, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS5_RING_BASE } }, }, [BCS6] = { .class = COPY_ENGINE_CLASS, .instance = 6, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS6_RING_BASE } }, }, [BCS7] = { .class = COPY_ENGINE_CLASS, .instance = 7, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS7_RING_BASE } }, }, [BCS8] = { .class = COPY_ENGINE_CLASS, .instance = 8, .mmio_bases = { { .graphics_ver = 12, .base = XEHPC_BCS8_RING_BASE } }, }, [VCS0] = { .class = VIDEO_DECODE_CLASS, .instance = 0, .mmio_bases = { { .graphics_ver = 11, .base = GEN11_BSD_RING_BASE }, { .graphics_ver = 6, .base = GEN6_BSD_RING_BASE }, { .graphics_ver = 4, .base = BSD_RING_BASE } }, }, [VCS1] = { .class = VIDEO_DECODE_CLASS, .instance = 1, .mmio_bases = { { .graphics_ver = 11, .base = GEN11_BSD2_RING_BASE }, { .graphics_ver = 8, .base = GEN8_BSD2_RING_BASE } }, }, [VCS2] = { .class = VIDEO_DECODE_CLASS, .instance = 2, .mmio_bases = { { .graphics_ver = 11, .base = GEN11_BSD3_RING_BASE } }, }, [VCS3] = { .class = VIDEO_DECODE_CLASS, .instance = 3, .mmio_bases = { { .graphics_ver = 11, .base = GEN11_BSD4_RING_BASE } }, }, [VCS4] = { .class = VIDEO_DECODE_CLASS, .instance = 4, .mmio_bases = { { .graphics_ver = 12, .base = XEHP_BSD5_RING_BASE } }, }, [VCS5] = { .class = VIDEO_DECODE_CLASS, .instance = 5, .mmio_bases = { { .graphics_ver = 12, .base = XEHP_BSD6_RING_BASE } }, }, [VCS6] = { .class = VIDEO_DECODE_CLASS, .instance = 6, .mmio_bases = { { .graphics_ver = 12, .base = XEHP_BSD7_RING_BASE } }, }, [VCS7] = { .class = VIDEO_DECODE_CLASS, .instance = 7, .mmio_bases = { { .graphics_ver = 12, .base = XEHP_BSD8_RING_BASE } }, }, [VECS0] = { .class = VIDEO_ENHANCEMENT_CLASS, .instance = 0, .mmio_bases = { { .graphics_ver = 11, .base = GEN11_VEBOX_RING_BASE }, { .graphics_ver = 7, .base = VEBOX_RING_BASE } }, }, [VECS1] = { .class = VIDEO_ENHANCEMENT_CLASS, .instance = 1, .mmio_bases = { { .graphics_ver = 11, .base = GEN11_VEBOX2_RING_BASE } }, }, [VECS2] = { .class = VIDEO_ENHANCEMENT_CLASS, .instance = 2, .mmio_bases = { { .graphics_ver = 12, .base = XEHP_VEBOX3_RING_BASE } }, }, [VECS3] = { .class = VIDEO_ENHANCEMENT_CLASS, .instance = 3, .mmio_bases = { { .graphics_ver = 12, .base = XEHP_VEBOX4_RING_BASE } }, }, [CCS0] = { .class = COMPUTE_CLASS, .instance = 0, .mmio_bases = { { .graphics_ver = 12, .base = GEN12_COMPUTE0_RING_BASE } } }, [CCS1] = { .class = COMPUTE_CLASS, .instance = 1, .mmio_bases = { { .graphics_ver = 12, .base = GEN12_COMPUTE1_RING_BASE } } }, [CCS2] = { .class = COMPUTE_CLASS, .instance = 2, .mmio_bases = { { .graphics_ver = 12, .base = GEN12_COMPUTE2_RING_BASE } } }, [CCS3] = { .class = COMPUTE_CLASS, .instance = 3, .mmio_bases = { { .graphics_ver = 12, .base = GEN12_COMPUTE3_RING_BASE } } }, [GSC0] = { .class = OTHER_CLASS, .instance = OTHER_GSC_INSTANCE, .mmio_bases = { { .graphics_ver = 12, .base = MTL_GSC_RING_BASE } } }, }; /** * intel_engine_context_size() - return the size of the context for an engine * @gt: the gt * @class: engine class * * Each engine class may require a different amount of space for a context * image. * * Return: size (in bytes) of an engine class specific context image * * Note: this size includes the HWSP, which is part of the context image * in LRC mode, but does not include the "shared data page" used with * GuC submission. The caller should account for this if using the GuC. */ u32 intel_engine_context_size(struct intel_gt *gt, u8 class) { struct intel_uncore *uncore = gt->uncore; u32 cxt_size; BUILD_BUG_ON(I915_GTT_PAGE_SIZE != PAGE_SIZE); switch (class) { case COMPUTE_CLASS: fallthrough; case RENDER_CLASS: switch (GRAPHICS_VER(gt->i915)) { default: MISSING_CASE(GRAPHICS_VER(gt->i915)); return DEFAULT_LR_CONTEXT_RENDER_SIZE; case 12: case 11: return GEN11_LR_CONTEXT_RENDER_SIZE; case 9: return GEN9_LR_CONTEXT_RENDER_SIZE; case 8: return GEN8_LR_CONTEXT_RENDER_SIZE; case 7: if (IS_HASWELL(gt->i915)) return HSW_CXT_TOTAL_SIZE; cxt_size = intel_uncore_read(uncore, GEN7_CXT_SIZE); return round_up(GEN7_CXT_TOTAL_SIZE(cxt_size) * 64, PAGE_SIZE); case 6: cxt_size = intel_uncore_read(uncore, CXT_SIZE); return round_up(GEN6_CXT_TOTAL_SIZE(cxt_size) * 64, PAGE_SIZE); case 5: case 4: /* * There is a discrepancy here between the size reported * by the register and the size of the context layout * in the docs. Both are described as authorative! * * The discrepancy is on the order of a few cachelines, * but the total is under one page (4k), which is our * minimum allocation anyway so it should all come * out in the wash. */ cxt_size = intel_uncore_read(uncore, CXT_SIZE) + 1; gt_dbg(gt, "graphics_ver = %d CXT_SIZE = %d bytes [0x%08x]\n", GRAPHICS_VER(gt->i915), cxt_size * 64, cxt_size - 1); return round_up(cxt_size * 64, PAGE_SIZE); case 3: case 2: /* For the special day when i810 gets merged. */ case 1: return 0; } break; default: MISSING_CASE(class); fallthrough; case VIDEO_DECODE_CLASS: case VIDEO_ENHANCEMENT_CLASS: case COPY_ENGINE_CLASS: case OTHER_CLASS: if (GRAPHICS_VER(gt->i915) < 8) return 0; return GEN8_LR_CONTEXT_OTHER_SIZE; } } static u32 __engine_mmio_base(struct drm_i915_private *i915, const struct engine_mmio_base *bases) { int i; for (i = 0; i < MAX_MMIO_BASES; i++) if (GRAPHICS_VER(i915) >= bases[i].graphics_ver) break; GEM_BUG_ON(i == MAX_MMIO_BASES); GEM_BUG_ON(!bases[i].base); return bases[i].base; } static void __sprint_engine_name(struct intel_engine_cs *engine) { /* * Before we know what the uABI name for this engine will be, * we still would like to keep track of this engine in the debug logs. * We throw in a ' here as a reminder that this isn't its final name. */ GEM_WARN_ON(snprintf(engine->name, sizeof(engine->name), "%s'%u", intel_engine_class_repr(engine->class), engine->instance) >= sizeof(engine->name)); } void intel_engine_set_hwsp_writemask(struct intel_engine_cs *engine, u32 mask) { /* * Though they added more rings on g4x/ilk, they did not add * per-engine HWSTAM until gen6. */ if (GRAPHICS_VER(engine->i915) < 6 && engine->class != RENDER_CLASS) return; if (GRAPHICS_VER(engine->i915) >= 3) ENGINE_WRITE(engine, RING_HWSTAM, mask); else ENGINE_WRITE16(engine, RING_HWSTAM, mask); } static void intel_engine_sanitize_mmio(struct intel_engine_cs *engine) { /* Mask off all writes into the unknown HWSP */ intel_engine_set_hwsp_writemask(engine, ~0u); } static void nop_irq_handler(struct intel_engine_cs *engine, u16 iir) { GEM_DEBUG_WARN_ON(iir); } static u32 get_reset_domain(u8 ver, enum intel_engine_id id) { u32 reset_domain; if (ver >= 11) { static const u32 engine_reset_domains[] = { [RCS0] = GEN11_GRDOM_RENDER, [BCS0] = GEN11_GRDOM_BLT, [BCS1] = XEHPC_GRDOM_BLT1, [BCS2] = XEHPC_GRDOM_BLT2, [BCS3] = XEHPC_GRDOM_BLT3, [BCS4] = XEHPC_GRDOM_BLT4, [BCS5] = XEHPC_GRDOM_BLT5, [BCS6] = XEHPC_GRDOM_BLT6, [BCS7] = XEHPC_GRDOM_BLT7, [BCS8] = XEHPC_GRDOM_BLT8, [VCS0] = GEN11_GRDOM_MEDIA, [VCS1] = GEN11_GRDOM_MEDIA2, [VCS2] = GEN11_GRDOM_MEDIA3, [VCS3] = GEN11_GRDOM_MEDIA4, [VCS4] = GEN11_GRDOM_MEDIA5, [VCS5] = GEN11_GRDOM_MEDIA6, [VCS6] = GEN11_GRDOM_MEDIA7, [VCS7] = GEN11_GRDOM_MEDIA8, [VECS0] = GEN11_GRDOM_VECS, [VECS1] = GEN11_GRDOM_VECS2, [VECS2] = GEN11_GRDOM_VECS3, [VECS3] = GEN11_GRDOM_VECS4, [CCS0] = GEN11_GRDOM_RENDER, [CCS1] = GEN11_GRDOM_RENDER, [CCS2] = GEN11_GRDOM_RENDER, [CCS3] = GEN11_GRDOM_RENDER, [GSC0] = GEN12_GRDOM_GSC, }; GEM_BUG_ON(id >= ARRAY_SIZE(engine_reset_domains) || !engine_reset_domains[id]); reset_domain = engine_reset_domains[id]; } else { static const u32 engine_reset_domains[] = { [RCS0] = GEN6_GRDOM_RENDER, [BCS0] = GEN6_GRDOM_BLT, [VCS0] = GEN6_GRDOM_MEDIA, [VCS1] = GEN8_GRDOM_MEDIA2, [VECS0] = GEN6_GRDOM_VECS, }; GEM_BUG_ON(id >= ARRAY_SIZE(engine_reset_domains) || !engine_reset_domains[id]); reset_domain = engine_reset_domains[id]; } return reset_domain; } static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id, u8 logical_instance) { const struct engine_info *info = &intel_engines[id]; struct drm_i915_private *i915 = gt->i915; struct intel_engine_cs *engine; u8 guc_class; BUILD_BUG_ON(MAX_ENGINE_CLASS >= BIT(GEN11_ENGINE_CLASS_WIDTH)); BUILD_BUG_ON(MAX_ENGINE_INSTANCE >= BIT(GEN11_ENGINE_INSTANCE_WIDTH)); BUILD_BUG_ON(I915_MAX_VCS > (MAX_ENGINE_INSTANCE + 1)); BUILD_BUG_ON(I915_MAX_VECS > (MAX_ENGINE_INSTANCE + 1)); if (GEM_DEBUG_WARN_ON(id >= ARRAY_SIZE(gt->engine))) return -EINVAL; if (GEM_DEBUG_WARN_ON(info->class > MAX_ENGINE_CLASS)) return -EINVAL; if (GEM_DEBUG_WARN_ON(info->instance > MAX_ENGINE_INSTANCE)) return -EINVAL; if (GEM_DEBUG_WARN_ON(gt->engine_class[info->class][info->instance])) return -EINVAL; engine = kzalloc(sizeof(*engine), GFP_KERNEL); if (!engine) return -ENOMEM; BUILD_BUG_ON(BITS_PER_TYPE(engine->mask) < I915_NUM_ENGINES); INIT_LIST_HEAD(&engine->pinned_contexts_list); engine->id = id; engine->legacy_idx = INVALID_ENGINE; engine->mask = BIT(id); engine->reset_domain = get_reset_domain(GRAPHICS_VER(gt->i915), id); engine->i915 = i915; engine->gt = gt; engine->uncore = gt->uncore; guc_class = engine_class_to_guc_class(info->class); engine->guc_id = MAKE_GUC_ID(guc_class, info->instance); engine->mmio_base = __engine_mmio_base(i915, info->mmio_bases); engine->irq_handler = nop_irq_handler; engine->class = info->class; engine->instance = info->instance; engine->logical_mask = BIT(logical_instance); __sprint_engine_name(engine); if ((engine->class == COMPUTE_CLASS || engine->class == RENDER_CLASS) && __ffs(CCS_MASK(engine->gt) | RCS_MASK(engine->gt)) == engine->instance) engine->flags |= I915_ENGINE_FIRST_RENDER_COMPUTE; /* features common between engines sharing EUs */ if (engine->class == RENDER_CLASS || engine->class == COMPUTE_CLASS) { engine->flags |= I915_ENGINE_HAS_RCS_REG_STATE; engine->flags |= I915_ENGINE_HAS_EU_PRIORITY; } engine->props.heartbeat_interval_ms = CONFIG_DRM_I915_HEARTBEAT_INTERVAL; engine->props.max_busywait_duration_ns = CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT; engine->props.preempt_timeout_ms = CONFIG_DRM_I915_PREEMPT_TIMEOUT; engine->props.stop_timeout_ms = CONFIG_DRM_I915_STOP_TIMEOUT; engine->props.timeslice_duration_ms = CONFIG_DRM_I915_TIMESLICE_DURATION; /* * Mid-thread pre-emption is not available in Gen12. Unfortunately, * some compute workloads run quite long threads. That means they get * reset due to not pre-empting in a timely manner. So, bump the * pre-emption timeout value to be much higher for compute engines. */ if (GRAPHICS_VER(i915) == 12 && (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE)) engine->props.preempt_timeout_ms = CONFIG_DRM_I915_PREEMPT_TIMEOUT_COMPUTE; /* Cap properties according to any system limits */ #define CLAMP_PROP(field) \ do { \ u64 clamp = intel_clamp_##field(engine, engine->props.field); \ if (clamp != engine->props.field) { \ drm_notice(&engine->i915->drm, \ "Warning, clamping %s to %lld to prevent overflow\n", \ #field, clamp); \ engine->props.field = clamp; \ } \ } while (0) CLAMP_PROP(heartbeat_interval_ms); CLAMP_PROP(max_busywait_duration_ns); CLAMP_PROP(preempt_timeout_ms); CLAMP_PROP(stop_timeout_ms); CLAMP_PROP(timeslice_duration_ms); #undef CLAMP_PROP engine->defaults = engine->props; /* never to change again */ engine->context_size = intel_engine_context_size(gt, engine->class); if (WARN_ON(engine->context_size > BIT(20))) engine->context_size = 0; if (engine->context_size) DRIVER_CAPS(i915)->has_logical_contexts = true; ewma__engine_latency_init(&engine->latency); ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier); /* Scrub mmio state on takeover */ intel_engine_sanitize_mmio(engine); gt->engine_class[info->class][info->instance] = engine; gt->engine[id] = engine; return 0; } u64 intel_clamp_heartbeat_interval_ms(struct intel_engine_cs *engine, u64 value) { value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT)); return value; } u64 intel_clamp_max_busywait_duration_ns(struct intel_engine_cs *engine, u64 value) { value = min(value, jiffies_to_nsecs(2)); return value; } u64 intel_clamp_preempt_timeout_ms(struct intel_engine_cs *engine, u64 value) { /* * NB: The GuC API only supports 32bit values. However, the limit is further * reduced due to internal calculations which would otherwise overflow. */ if (intel_guc_submission_is_wanted(gt_to_guc(engine->gt))) value = min_t(u64, value, guc_policy_max_preempt_timeout_ms()); value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT)); return value; } u64 intel_clamp_stop_timeout_ms(struct intel_engine_cs *engine, u64 value) { value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT)); return value; } u64 intel_clamp_timeslice_duration_ms(struct intel_engine_cs *engine, u64 value) { /* * NB: The GuC API only supports 32bit values. However, the limit is further * reduced due to internal calculations which would otherwise overflow. */ if (intel_guc_submission_is_wanted(gt_to_guc(engine->gt))) value = min_t(u64, value, guc_policy_max_exec_quantum_ms()); value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT)); return value; } static void __setup_engine_capabilities(struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; if (engine->class == VIDEO_DECODE_CLASS) { /* * HEVC support is present on first engine instance * before Gen11 and on all instances afterwards. */ if (GRAPHICS_VER(i915) >= 11 || (GRAPHICS_VER(i915) >= 9 && engine->instance == 0)) engine->uabi_capabilities |= I915_VIDEO_CLASS_CAPABILITY_HEVC; /* * SFC block is present only on even logical engine * instances. */ if ((GRAPHICS_VER(i915) >= 11 && (engine->gt->info.vdbox_sfc_access & BIT(engine->instance))) || (GRAPHICS_VER(i915) >= 9 && engine->instance == 0)) engine->uabi_capabilities |= I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC; } else if (engine->class == VIDEO_ENHANCEMENT_CLASS) { if (GRAPHICS_VER(i915) >= 9 && engine->gt->info.sfc_mask & BIT(engine->instance)) engine->uabi_capabilities |= I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC; } } static void intel_setup_engine_capabilities(struct intel_gt *gt) { struct intel_engine_cs *engine; enum intel_engine_id id; for_each_engine(engine, gt, id) __setup_engine_capabilities(engine); } /** * intel_engines_release() - free the resources allocated for Command Streamers * @gt: pointer to struct intel_gt */ void intel_engines_release(struct intel_gt *gt) { struct intel_engine_cs *engine; enum intel_engine_id id; /* * Before we release the resources held by engine, we must be certain * that the HW is no longer accessing them -- having the GPU scribble * to or read from a page being used for something else causes no end * of fun. * * The GPU should be reset by this point, but assume the worst just * in case we aborted before completely initialising the engines. */ GEM_BUG_ON(intel_gt_pm_is_awake(gt)); if (!INTEL_INFO(gt->i915)->gpu_reset_clobbers_display) intel_gt_reset_all_engines(gt); /* Decouple the backend; but keep the layout for late GPU resets */ for_each_engine(engine, gt, id) { if (!engine->release) continue; intel_wakeref_wait_for_idle(&engine->wakeref); GEM_BUG_ON(intel_engine_pm_is_awake(engine)); engine->release(engine); engine->release = NULL; memset(&engine->reset, 0, sizeof(engine->reset)); } } void intel_engine_free_request_pool(struct intel_engine_cs *engine) { if (!engine->request_pool) return; kmem_cache_free(i915_request_slab_cache(), engine->request_pool); } void intel_engines_free(struct intel_gt *gt) { struct intel_engine_cs *engine; enum intel_engine_id id; /* Free the requests! dma-resv keeps fences around for an eternity */ rcu_barrier(); for_each_engine(engine, gt, id) { intel_engine_free_request_pool(engine); kfree(engine); gt->engine[id] = NULL; } } static bool gen11_vdbox_has_sfc(struct intel_gt *gt, unsigned int physical_vdbox, unsigned int logical_vdbox, u16 vdbox_mask) { struct drm_i915_private *i915 = gt->i915; /* * In Gen11, only even numbered logical VDBOXes are hooked * up to an SFC (Scaler & Format Converter) unit. * In Gen12, Even numbered physical instance always are connected * to an SFC. Odd numbered physical instances have SFC only if * previous even instance is fused off. * * Starting with Xe_HP, there's also a dedicated SFC_ENABLE field * in the fuse register that tells us whether a specific SFC is present. */ if ((gt->info.sfc_mask & BIT(physical_vdbox / 2)) == 0) return false; else if (MEDIA_VER(i915) >= 12) return (physical_vdbox % 2 == 0) || !(BIT(physical_vdbox - 1) & vdbox_mask); else if (MEDIA_VER(i915) == 11) return logical_vdbox % 2 == 0; return false; } static void engine_mask_apply_media_fuses(struct intel_gt *gt) { struct drm_i915_private *i915 = gt->i915; unsigned int logical_vdbox = 0; unsigned int i; u32 media_fuse, fuse1; u16 vdbox_mask; u16 vebox_mask; if (MEDIA_VER(gt->i915) < 11) return; /* * On newer platforms the fusing register is called 'enable' and has * enable semantics, while on older platforms it is called 'disable' * and bits have disable semantices. */ media_fuse = intel_uncore_read(gt->uncore, GEN11_GT_VEBOX_VDBOX_DISABLE); if (MEDIA_VER_FULL(i915) < IP_VER(12, 55)) media_fuse = ~media_fuse; vdbox_mask = media_fuse & GEN11_GT_VDBOX_DISABLE_MASK; vebox_mask = (media_fuse & GEN11_GT_VEBOX_DISABLE_MASK) >> GEN11_GT_VEBOX_DISABLE_SHIFT; if (MEDIA_VER_FULL(i915) >= IP_VER(12, 55)) { fuse1 = intel_uncore_read(gt->uncore, HSW_PAVP_FUSE1); gt->info.sfc_mask = REG_FIELD_GET(XEHP_SFC_ENABLE_MASK, fuse1); } else { gt->info.sfc_mask = ~0; } for (i = 0; i < I915_MAX_VCS; i++) { if (!HAS_ENGINE(gt, _VCS(i))) { vdbox_mask &= ~BIT(i); continue; } if (!(BIT(i) & vdbox_mask)) { gt->info.engine_mask &= ~BIT(_VCS(i)); gt_dbg(gt, "vcs%u fused off\n", i); continue; } if (gen11_vdbox_has_sfc(gt, i, logical_vdbox, vdbox_mask)) gt->info.vdbox_sfc_access |= BIT(i); logical_vdbox++; } gt_dbg(gt, "vdbox enable: %04x, instances: %04lx\n", vdbox_mask, VDBOX_MASK(gt)); GEM_BUG_ON(vdbox_mask != VDBOX_MASK(gt)); for (i = 0; i < I915_MAX_VECS; i++) { if (!HAS_ENGINE(gt, _VECS(i))) { vebox_mask &= ~BIT(i); continue; } if (!(BIT(i) & vebox_mask)) { gt->info.engine_mask &= ~BIT(_VECS(i)); gt_dbg(gt, "vecs%u fused off\n", i); } } gt_dbg(gt, "vebox enable: %04x, instances: %04lx\n", vebox_mask, VEBOX_MASK(gt)); GEM_BUG_ON(vebox_mask != VEBOX_MASK(gt)); } static void engine_mask_apply_compute_fuses(struct intel_gt *gt) { struct drm_i915_private *i915 = gt->i915; struct intel_gt_info *info = >->info; int ss_per_ccs = info->sseu.max_subslices / I915_MAX_CCS; unsigned long ccs_mask; unsigned int i; if (GRAPHICS_VER(i915) < 11) return; if (hweight32(CCS_MASK(gt)) <= 1) return; ccs_mask = intel_slicemask_from_xehp_dssmask(info->sseu.compute_subslice_mask, ss_per_ccs); /* * If all DSS in a quadrant are fused off, the corresponding CCS * engine is not available for use. */ for_each_clear_bit(i, &ccs_mask, I915_MAX_CCS) { info->engine_mask &= ~BIT(_CCS(i)); gt_dbg(gt, "ccs%u fused off\n", i); } } /* * Determine which engines are fused off in our particular hardware. * Note that we have a catch-22 situation where we need to be able to access * the blitter forcewake domain to read the engine fuses, but at the same time * we need to know which engines are available on the system to know which * forcewake domains are present. We solve this by intializing the forcewake * domains based on the full engine mask in the platform capabilities before * calling this function and pruning the domains for fused-off engines * afterwards. */ static intel_engine_mask_t init_engine_mask(struct intel_gt *gt) { struct intel_gt_info *info = >->info; GEM_BUG_ON(!info->engine_mask); engine_mask_apply_media_fuses(gt); engine_mask_apply_compute_fuses(gt); /* * The only use of the GSC CS is to load and communicate with the GSC * FW, so we have no use for it if we don't have the FW. * * IMPORTANT: in cases where we don't have the GSC FW, we have a * catch-22 situation that breaks media C6 due to 2 requirements: * 1) once turned on, the GSC power well will not go to sleep unless the * GSC FW is loaded. * 2) to enable idling (which is required for media C6) we need to * initialize the IDLE_MSG register for the GSC CS and do at least 1 * submission, which will wake up the GSC power well. */ if (__HAS_ENGINE(info->engine_mask, GSC0) && !intel_uc_wants_gsc_uc(>->uc)) { gt_notice(gt, "No GSC FW selected, disabling GSC CS and media C6\n"); info->engine_mask &= ~BIT(GSC0); } /* * Do not create the command streamer for CCS slices beyond the first. * All the workload submitted to the first engine will be shared among * all the slices. * * Once the user will be allowed to customize the CCS mode, then this * check needs to be removed. */ if (IS_DG2(gt->i915)) { u8 first_ccs = __ffs(CCS_MASK(gt)); /* Mask off all the CCS engine */ info->engine_mask &= ~GENMASK(CCS3, CCS0); /* Put back in the first CCS engine */ info->engine_mask |= BIT(_CCS(first_ccs)); } return info->engine_mask; } static void populate_logical_ids(struct intel_gt *gt, u8 *logical_ids, u8 class, const u8 *map, u8 num_instances) { int i, j; u8 current_logical_id = 0; for (j = 0; j < num_instances; ++j) { for (i = 0; i < ARRAY_SIZE(intel_engines); ++i) { if (!HAS_ENGINE(gt, i) || intel_engines[i].class != class) continue; if (intel_engines[i].instance == map[j]) { logical_ids[intel_engines[i].instance] = current_logical_id++; break; } } } } static void setup_logical_ids(struct intel_gt *gt, u8 *logical_ids, u8 class) { /* * Logical to physical mapping is needed for proper support * to split-frame feature. */ if (MEDIA_VER(gt->i915) >= 11 && class == VIDEO_DECODE_CLASS) { const u8 map[] = { 0, 2, 4, 6, 1, 3, 5, 7 }; populate_logical_ids(gt, logical_ids, class, map, ARRAY_SIZE(map)); } else { int i; u8 map[MAX_ENGINE_INSTANCE + 1]; for (i = 0; i < MAX_ENGINE_INSTANCE + 1; ++i) map[i] = i; populate_logical_ids(gt, logical_ids, class, map, ARRAY_SIZE(map)); } } /** * intel_engines_init_mmio() - allocate and prepare the Engine Command Streamers * @gt: pointer to struct intel_gt * * Return: non-zero if the initialization failed. */ int intel_engines_init_mmio(struct intel_gt *gt) { struct drm_i915_private *i915 = gt->i915; const unsigned int engine_mask = init_engine_mask(gt); unsigned int mask = 0; unsigned int i, class; u8 logical_ids[MAX_ENGINE_INSTANCE + 1]; int err; drm_WARN_ON(&i915->drm, engine_mask == 0); drm_WARN_ON(&i915->drm, engine_mask & GENMASK(BITS_PER_TYPE(mask) - 1, I915_NUM_ENGINES)); if (i915_inject_probe_failure(i915)) return -ENODEV; for (class = 0; class < MAX_ENGINE_CLASS + 1; ++class) { setup_logical_ids(gt, logical_ids, class); for (i = 0; i < ARRAY_SIZE(intel_engines); ++i) { u8 instance = intel_engines[i].instance; if (intel_engines[i].class != class || !HAS_ENGINE(gt, i)) continue; err = intel_engine_setup(gt, i, logical_ids[instance]); if (err) goto cleanup; mask |= BIT(i); } } /* * Catch failures to update intel_engines table when the new engines * are added to the driver by a warning and disabling the forgotten * engines. */ if (drm_WARN_ON(&i915->drm, mask != engine_mask)) gt->info.engine_mask = mask; gt->info.num_engines = hweight32(mask); intel_gt_check_and_clear_faults(gt); intel_setup_engine_capabilities(gt); intel_uncore_prune_engine_fw_domains(gt->uncore, gt); return 0; cleanup: intel_engines_free(gt); return err; } void intel_engine_init_execlists(struct intel_engine_cs *engine) { struct intel_engine_execlists * const execlists = &engine->execlists; execlists->port_mask = 1; GEM_BUG_ON(!is_power_of_2(execlists_num_ports(execlists))); GEM_BUG_ON(execlists_num_ports(execlists) > EXECLIST_MAX_PORTS); memset(execlists->pending, 0, sizeof(execlists->pending)); execlists->active = memset(execlists->inflight, 0, sizeof(execlists->inflight)); } static void cleanup_status_page(struct intel_engine_cs *engine) { struct i915_vma *vma; /* Prevent writes into HWSP after returning the page to the system */ intel_engine_set_hwsp_writemask(engine, ~0u); vma = fetch_and_zero(&engine->status_page.vma); if (!vma) return; if (!HWS_NEEDS_PHYSICAL(engine->i915)) i915_vma_unpin(vma); i915_gem_object_unpin_map(vma->obj); i915_gem_object_put(vma->obj); } static int pin_ggtt_status_page(struct intel_engine_cs *engine, struct i915_gem_ww_ctx *ww, struct i915_vma *vma) { unsigned int flags; if (!HAS_LLC(engine->i915) && i915_ggtt_has_aperture(engine->gt->ggtt)) /* * On g33, we cannot place HWS above 256MiB, so * restrict its pinning to the low mappable arena. * Though this restriction is not documented for * gen4, gen5, or byt, they also behave similarly * and hang if the HWS is placed at the top of the * GTT. To generalise, it appears that all !llc * platforms have issues with us placing the HWS * above the mappable region (even though we never * actually map it). */ flags = PIN_MAPPABLE; else flags = PIN_HIGH; return i915_ggtt_pin(vma, ww, 0, flags); } static int init_status_page(struct intel_engine_cs *engine) { struct drm_i915_gem_object *obj; struct i915_gem_ww_ctx ww; struct i915_vma *vma; void *vaddr; int ret; INIT_LIST_HEAD(&engine->status_page.timelines); /* * Though the HWS register does support 36bit addresses, historically * we have had hangs and corruption reported due to wild writes if * the HWS is placed above 4G. We only allow objects to be allocated * in GFP_DMA32 for i965, and no earlier physical address users had * access to more than 4G. */ obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE); if (IS_ERR(obj)) { gt_err(engine->gt, "Failed to allocate status page\n"); return PTR_ERR(obj); } i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC); vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto err_put; } i915_gem_ww_ctx_init(&ww, true); retry: ret = i915_gem_object_lock(obj, &ww); if (!ret && !HWS_NEEDS_PHYSICAL(engine->i915)) ret = pin_ggtt_status_page(engine, &ww, vma); if (ret) goto err; vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB); if (IS_ERR(vaddr)) { ret = PTR_ERR(vaddr); goto err_unpin; } engine->status_page.addr = memset(vaddr, 0, PAGE_SIZE); engine->status_page.vma = vma; err_unpin: if (ret) i915_vma_unpin(vma); err: if (ret == -EDEADLK) { ret = i915_gem_ww_ctx_backoff(&ww); if (!ret) goto retry; } i915_gem_ww_ctx_fini(&ww); err_put: if (ret) i915_gem_object_put(obj); return ret; } static int intel_engine_init_tlb_invalidation(struct intel_engine_cs *engine) { static const union intel_engine_tlb_inv_reg gen8_regs[] = { [RENDER_CLASS].reg = GEN8_RTCR, [VIDEO_DECODE_CLASS].reg = GEN8_M1TCR, /* , GEN8_M2TCR */ [VIDEO_ENHANCEMENT_CLASS].reg = GEN8_VTCR, [COPY_ENGINE_CLASS].reg = GEN8_BTCR, }; static const union intel_engine_tlb_inv_reg gen12_regs[] = { [RENDER_CLASS].reg = GEN12_GFX_TLB_INV_CR, [VIDEO_DECODE_CLASS].reg = GEN12_VD_TLB_INV_CR, [VIDEO_ENHANCEMENT_CLASS].reg = GEN12_VE_TLB_INV_CR, [COPY_ENGINE_CLASS].reg = GEN12_BLT_TLB_INV_CR, [COMPUTE_CLASS].reg = GEN12_COMPCTX_TLB_INV_CR, }; static const union intel_engine_tlb_inv_reg xehp_regs[] = { [RENDER_CLASS].mcr_reg = XEHP_GFX_TLB_INV_CR, [VIDEO_DECODE_CLASS].mcr_reg = XEHP_VD_TLB_INV_CR, [VIDEO_ENHANCEMENT_CLASS].mcr_reg = XEHP_VE_TLB_INV_CR, [COPY_ENGINE_CLASS].mcr_reg = XEHP_BLT_TLB_INV_CR, [COMPUTE_CLASS].mcr_reg = XEHP_COMPCTX_TLB_INV_CR, }; static const union intel_engine_tlb_inv_reg xelpmp_regs[] = { [VIDEO_DECODE_CLASS].reg = GEN12_VD_TLB_INV_CR, [VIDEO_ENHANCEMENT_CLASS].reg = GEN12_VE_TLB_INV_CR, [OTHER_CLASS].reg = XELPMP_GSC_TLB_INV_CR, }; struct drm_i915_private *i915 = engine->i915; const unsigned int instance = engine->instance; const unsigned int class = engine->class; const union intel_engine_tlb_inv_reg *regs; union intel_engine_tlb_inv_reg reg; unsigned int num = 0; u32 val; /* * New platforms should not be added with catch-all-newer (>=) * condition so that any later platform added triggers the below warning * and in turn mandates a human cross-check of whether the invalidation * flows have compatible semantics. * * For instance with the 11.00 -> 12.00 transition three out of five * respective engine registers were moved to masked type. Then after the * 12.00 -> 12.50 transition multi cast handling is required too. */ if (engine->gt->type == GT_MEDIA) { if (MEDIA_VER_FULL(i915) == IP_VER(13, 0)) { regs = xelpmp_regs; num = ARRAY_SIZE(xelpmp_regs); } } else { if (GRAPHICS_VER_FULL(i915) == IP_VER(12, 74) || GRAPHICS_VER_FULL(i915) == IP_VER(12, 71) || GRAPHICS_VER_FULL(i915) == IP_VER(12, 70) || GRAPHICS_VER_FULL(i915) == IP_VER(12, 55)) { regs = xehp_regs; num = ARRAY_SIZE(xehp_regs); } else if (GRAPHICS_VER_FULL(i915) == IP_VER(12, 0) || GRAPHICS_VER_FULL(i915) == IP_VER(12, 10)) { regs = gen12_regs; num = ARRAY_SIZE(gen12_regs); } else if (GRAPHICS_VER(i915) >= 8 && GRAPHICS_VER(i915) <= 11) { regs = gen8_regs; num = ARRAY_SIZE(gen8_regs); } else if (GRAPHICS_VER(i915) < 8) { return 0; } } if (gt_WARN_ONCE(engine->gt, !num, "Platform does not implement TLB invalidation!")) return -ENODEV; if (gt_WARN_ON_ONCE(engine->gt, class >= num || (!regs[class].reg.reg && !regs[class].mcr_reg.reg))) return -ERANGE; reg = regs[class]; if (regs == xelpmp_regs && class == OTHER_CLASS) { /* * There's only a single GSC instance, but it uses register bit * 1 instead of either 0 or OTHER_GSC_INSTANCE. */ GEM_WARN_ON(instance != OTHER_GSC_INSTANCE); val = 1; } else if (regs == gen8_regs && class == VIDEO_DECODE_CLASS && instance == 1) { reg.reg = GEN8_M2TCR; val = 0; } else { val = instance; } val = BIT(val); engine->tlb_inv.mcr = regs == xehp_regs; engine->tlb_inv.reg = reg; engine->tlb_inv.done = val; if (GRAPHICS_VER(i915) >= 12 && (engine->class == VIDEO_DECODE_CLASS || engine->class == VIDEO_ENHANCEMENT_CLASS || engine->class == COMPUTE_CLASS || engine->class == OTHER_CLASS)) engine->tlb_inv.request = _MASKED_BIT_ENABLE(val); else engine->tlb_inv.request = val; return 0; } static int engine_setup_common(struct intel_engine_cs *engine) { int err; init_llist_head(&engine->barrier_tasks); err = intel_engine_init_tlb_invalidation(engine); if (err) return err; err = init_status_page(engine); if (err) return err; engine->breadcrumbs = intel_breadcrumbs_create(engine); if (!engine->breadcrumbs) { err = -ENOMEM; goto err_status; } engine->sched_engine = i915_sched_engine_create(ENGINE_PHYSICAL); if (!engine->sched_engine) { err = -ENOMEM; goto err_sched_engine; } engine->sched_engine->private_data = engine; err = intel_engine_init_cmd_parser(engine); if (err) goto err_cmd_parser; intel_engine_init_execlists(engine); intel_engine_init__pm(engine); intel_engine_init_retire(engine); /* Use the whole device by default */ engine->sseu = intel_sseu_from_device_info(&engine->gt->info.sseu); intel_engine_init_workarounds(engine); intel_engine_init_whitelist(engine); intel_engine_init_ctx_wa(engine); if (GRAPHICS_VER(engine->i915) >= 12) engine->flags |= I915_ENGINE_HAS_RELATIVE_MMIO; return 0; err_cmd_parser: i915_sched_engine_put(engine->sched_engine); err_sched_engine: intel_breadcrumbs_put(engine->breadcrumbs); err_status: cleanup_status_page(engine); return err; } struct measure_breadcrumb { struct i915_request rq; struct intel_ring ring; u32 cs[2048]; }; static int measure_breadcrumb_dw(struct intel_context *ce) { struct intel_engine_cs *engine = ce->engine; struct measure_breadcrumb *frame; int dw; GEM_BUG_ON(!engine->gt->scratch); frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) return -ENOMEM; frame->rq.i915 = engine->i915; frame->rq.engine = engine; frame->rq.context = ce; rcu_assign_pointer(frame->rq.timeline, ce->timeline); frame->rq.hwsp_seqno = ce->timeline->hwsp_seqno; frame->ring.vaddr = frame->cs; frame->ring.size = sizeof(frame->cs); frame->ring.wrap = BITS_PER_TYPE(frame->ring.size) - ilog2(frame->ring.size); frame->ring.effective_size = frame->ring.size; intel_ring_update_space(&frame->ring); frame->rq.ring = &frame->ring; mutex_lock(&ce->timeline->mutex); spin_lock_irq(&engine->sched_engine->lock); dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs; spin_unlock_irq(&engine->sched_engine->lock); mutex_unlock(&ce->timeline->mutex); GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */ kfree(frame); return dw; } struct intel_context * intel_engine_create_pinned_context(struct intel_engine_cs *engine, struct i915_address_space *vm, unsigned int ring_size, unsigned int hwsp, struct lock_class_key *key, const char *name) { struct intel_context *ce; int err; ce = intel_context_create(engine); if (IS_ERR(ce)) return ce; __set_bit(CONTEXT_BARRIER_BIT, &ce->flags); ce->timeline = page_pack_bits(NULL, hwsp); ce->ring = NULL; ce->ring_size = ring_size; i915_vm_put(ce->vm); ce->vm = i915_vm_get(vm); err = intel_context_pin(ce); /* perma-pin so it is always available */ if (err) { intel_context_put(ce); return ERR_PTR(err); } list_add_tail(&ce->pinned_contexts_link, &engine->pinned_contexts_list); /* * Give our perma-pinned kernel timelines a separate lockdep class, * so that we can use them from within the normal user timelines * should we need to inject GPU operations during their request * construction. */ lockdep_set_class_and_name(&ce->timeline->mutex, key, name); return ce; } void intel_engine_destroy_pinned_context(struct intel_context *ce) { struct intel_engine_cs *engine = ce->engine; struct i915_vma *hwsp = engine->status_page.vma; GEM_BUG_ON(ce->timeline->hwsp_ggtt != hwsp); mutex_lock(&hwsp->vm->mutex); list_del(&ce->timeline->engine_link); mutex_unlock(&hwsp->vm->mutex); list_del(&ce->pinned_contexts_link); intel_context_unpin(ce); intel_context_put(ce); } static struct intel_context * create_ggtt_bind_context(struct intel_engine_cs *engine) { static struct lock_class_key kernel; /* * MI_UPDATE_GTT can insert up to 511 PTE entries and there could be multiple * bind requets at a time so get a bigger ring. */ return intel_engine_create_pinned_context(engine, engine->gt->vm, SZ_512K, I915_GEM_HWS_GGTT_BIND_ADDR, &kernel, "ggtt_bind_context"); } static struct intel_context * create_kernel_context(struct intel_engine_cs *engine) { static struct lock_class_key kernel; return intel_engine_create_pinned_context(engine, engine->gt->vm, SZ_4K, I915_GEM_HWS_SEQNO_ADDR, &kernel, "kernel_context"); } /* * engine_init_common - initialize engine state which might require hw access * @engine: Engine to initialize. * * Initializes @engine@ structure members shared between legacy and execlists * submission modes which do require hardware access. * * Typcally done at later stages of submission mode specific engine setup. * * Returns zero on success or an error code on failure. */ static int engine_init_common(struct intel_engine_cs *engine) { struct intel_context *ce, *bce = NULL; int ret; engine->set_default_submission(engine); /* * We may need to do things with the shrinker which * require us to immediately switch back to the default * context. This can cause a problem as pinning the * default context also requires GTT space which may not * be available. To avoid this we always pin the default * context. */ ce = create_kernel_context(engine); if (IS_ERR(ce)) return PTR_ERR(ce); /* * Create a separate pinned context for GGTT update with blitter engine * if a platform require such service. MI_UPDATE_GTT works on other * engines as well but BCS should be less busy engine so pick that for * GGTT updates. */ if (i915_ggtt_require_binder(engine->i915) && engine->id == BCS0) { bce = create_ggtt_bind_context(engine); if (IS_ERR(bce)) { ret = PTR_ERR(bce); goto err_ce_context; } } ret = measure_breadcrumb_dw(ce); if (ret < 0) goto err_bce_context; engine->emit_fini_breadcrumb_dw = ret; engine->kernel_context = ce; engine->bind_context = bce; return 0; err_bce_context: if (bce) intel_engine_destroy_pinned_context(bce); err_ce_context: intel_engine_destroy_pinned_context(ce); return ret; } int intel_engines_init(struct intel_gt *gt) { int (*setup)(struct intel_engine_cs *engine); struct intel_engine_cs *engine; enum intel_engine_id id; int err; if (intel_uc_uses_guc_submission(>->uc)) { gt->submission_method = INTEL_SUBMISSION_GUC; setup = intel_guc_submission_setup; } else if (HAS_EXECLISTS(gt->i915)) { gt->submission_method = INTEL_SUBMISSION_ELSP; setup = intel_execlists_submission_setup; } else { gt->submission_method = INTEL_SUBMISSION_RING; setup = intel_ring_submission_setup; } for_each_engine(engine, gt, id) { err = engine_setup_common(engine); if (err) return err; err = setup(engine); if (err) { intel_engine_cleanup_common(engine); return err; } /* The backend should now be responsible for cleanup */ GEM_BUG_ON(engine->release == NULL); err = engine_init_common(engine); if (err) return err; intel_engine_add_user(engine); } return 0; } /** * intel_engine_cleanup_common - cleans up the engine state created by * the common initiailizers. * @engine: Engine to cleanup. * * This cleans up everything created by the common helpers. */ void intel_engine_cleanup_common(struct intel_engine_cs *engine) { GEM_BUG_ON(!list_empty(&engine->sched_engine->requests)); i915_sched_engine_put(engine->sched_engine); intel_breadcrumbs_put(engine->breadcrumbs); intel_engine_fini_retire(engine); intel_engine_cleanup_cmd_parser(engine); if (engine->default_state) fput(engine->default_state); if (engine->kernel_context) intel_engine_destroy_pinned_context(engine->kernel_context); if (engine->bind_context) intel_engine_destroy_pinned_context(engine->bind_context); GEM_BUG_ON(!llist_empty(&engine->barrier_tasks)); cleanup_status_page(engine); intel_wa_list_free(&engine->ctx_wa_list); intel_wa_list_free(&engine->wa_list); intel_wa_list_free(&engine->whitelist); } /** * intel_engine_resume - re-initializes the HW state of the engine * @engine: Engine to resume. * * Returns zero on success or an error code on failure. */ int intel_engine_resume(struct intel_engine_cs *engine) { intel_engine_apply_workarounds(engine); intel_engine_apply_whitelist(engine); return engine->resume(engine); } u64 intel_engine_get_active_head(const struct intel_engine_cs *engine) { struct drm_i915_private *i915 = engine->i915; u64 acthd; if (GRAPHICS_VER(i915) >= 8) acthd = ENGINE_READ64(engine, RING_ACTHD, RING_ACTHD_UDW); else if (GRAPHICS_VER(i915) >= 4) acthd = ENGINE_READ(engine, RING_ACTHD); else acthd = ENGINE_READ(engine, ACTHD); return acthd; } u64 intel_engine_get_last_batch_head(const struct intel_engine_cs *engine) { u64 bbaddr; if (GRAPHICS_VER(engine->i915) >= 8) bbaddr = ENGINE_READ64(engine, RING_BBADDR, RING_BBADDR_UDW); else bbaddr = ENGINE_READ(engine, RING_BBADDR); return bbaddr; } static unsigned long stop_timeout(const struct intel_engine_cs *engine) { if (in_atomic() || irqs_disabled()) /* inside atomic preempt-reset? */ return 0; /* * If we are doing a normal GPU reset, we can take our time and allow * the engine to quiesce. We've stopped submission to the engine, and * if we wait long enough an innocent context should complete and * leave the engine idle. So they should not be caught unaware by * the forthcoming GPU reset (which usually follows the stop_cs)! */ return READ_ONCE(engine->props.stop_timeout_ms); } static int __intel_engine_stop_cs(struct intel_engine_cs *engine, int fast_timeout_us, int slow_timeout_ms) { struct intel_uncore *uncore = engine->uncore; const i915_reg_t mode = RING_MI_MODE(engine->mmio_base); int err; intel_uncore_write_fw(uncore, mode, _MASKED_BIT_ENABLE(STOP_RING)); /* * Wa_22011802037: Prior to doing a reset, ensure CS is * stopped, set ring stop bit and prefetch disable bit to halt CS */ if (intel_engine_reset_needs_wa_22011802037(engine->gt)) intel_uncore_write_fw(uncore, RING_MODE_GEN7(engine->mmio_base), _MASKED_BIT_ENABLE(GEN12_GFX_PREFETCH_DISABLE)); err = __intel_wait_for_register_fw(engine->uncore, mode, MODE_IDLE, MODE_IDLE, fast_timeout_us, slow_timeout_ms, NULL); /* A final mmio read to let GPU writes be hopefully flushed to memory */ intel_uncore_posting_read_fw(uncore, mode); return err; } int intel_engine_stop_cs(struct intel_engine_cs *engine) { int err = 0; if (GRAPHICS_VER(engine->i915) < 3) return -ENODEV; ENGINE_TRACE(engine, "\n"); /* * TODO: Find out why occasionally stopping the CS times out. Seen * especially with gem_eio tests. * * Occasionally trying to stop the cs times out, but does not adversely * affect functionality. The timeout is set as a config parameter that * defaults to 100ms. In most cases the follow up operation is to wait * for pending MI_FORCE_WAKES. The assumption is that this timeout is * sufficient for any pending MI_FORCEWAKEs to complete. Once root * caused, the caller must check and handle the return from this * function. */ if (__intel_engine_stop_cs(engine, 1000, stop_timeout(engine))) { ENGINE_TRACE(engine, "timed out on STOP_RING -> IDLE; HEAD:%04x, TAIL:%04x\n", ENGINE_READ_FW(engine, RING_HEAD) & HEAD_ADDR, ENGINE_READ_FW(engine, RING_TAIL) & TAIL_ADDR); /* * Sometimes we observe that the idle flag is not * set even though the ring is empty. So double * check before giving up. */ if ((ENGINE_READ_FW(engine, RING_HEAD) & HEAD_ADDR) != (ENGINE_READ_FW(engine, RING_TAIL) & TAIL_ADDR)) err = -ETIMEDOUT; } return err; } void intel_engine_cancel_stop_cs(struct intel_engine_cs *engine) { ENGINE_TRACE(engine, "\n"); ENGINE_WRITE_FW(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING)); } static u32 __cs_pending_mi_force_wakes(struct intel_engine_cs *engine) { static const i915_reg_t _reg[I915_NUM_ENGINES] = { [RCS0] = MSG_IDLE_CS, [BCS0] = MSG_IDLE_BCS, [VCS0] = MSG_IDLE_VCS0, [VCS1] = MSG_IDLE_VCS1, [VCS2] = MSG_IDLE_VCS2, [VCS3] = MSG_IDLE_VCS3, [VCS4] = MSG_IDLE_VCS4, [VCS5] = MSG_IDLE_VCS5, [VCS6] = MSG_IDLE_VCS6, [VCS7] = MSG_IDLE_VCS7, [VECS0] = MSG_IDLE_VECS0, [VECS1] = MSG_IDLE_VECS1, [VECS2] = MSG_IDLE_VECS2, [VECS3] = MSG_IDLE_VECS3, [CCS0] = MSG_IDLE_CS, [CCS1] = MSG_IDLE_CS, [CCS2] = MSG_IDLE_CS, [CCS3] = MSG_IDLE_CS, }; u32 val; if (!_reg[engine->id].reg) return 0; val = intel_uncore_read(engine->uncore, _reg[engine->id]); /* bits[29:25] & bits[13:9] >> shift */ return (val & (val >> 16) & MSG_IDLE_FW_MASK) >> MSG_IDLE_FW_SHIFT; } static void __gpm_wait_for_fw_complete(struct intel_gt *gt, u32 fw_mask) { int ret; /* Ensure GPM receives fw up/down after CS is stopped */ udelay(1); /* Wait for forcewake request to complete in GPM */ ret = __intel_wait_for_register_fw(gt->uncore, GEN9_PWRGT_DOMAIN_STATUS, fw_mask, fw_mask, 5000, 0, NULL); /* Ensure CS receives fw ack from GPM */ udelay(1); if (ret) GT_TRACE(gt, "Failed to complete pending forcewake %d\n", ret); } /* * Wa_22011802037:gen12: In addition to stopping the cs, we need to wait for any * pending MI_FORCE_WAKEUP requests that the CS has initiated to complete. The * pending status is indicated by bits[13:9] (masked by bits[29:25]) in the * MSG_IDLE register. There's one MSG_IDLE register per reset domain. Since we * are concerned only with the gt reset here, we use a logical OR of pending * forcewakeups from all reset domains and then wait for them to complete by * querying PWRGT_DOMAIN_STATUS. */ void intel_engine_wait_for_pending_mi_fw(struct intel_engine_cs *engine) { u32 fw_pending = __cs_pending_mi_force_wakes(engine); if (fw_pending) __gpm_wait_for_fw_complete(engine->gt, fw_pending); } /* NB: please notice the memset */ void intel_engine_get_instdone(const struct intel_engine_cs *engine, struct intel_instdone *instdone) { struct drm_i915_private *i915 = engine->i915; struct intel_uncore *uncore = engine->uncore; u32 mmio_base = engine->mmio_base; int slice; int subslice; int iter; memset(instdone, 0, sizeof(*instdone)); if (GRAPHICS_VER(i915) >= 8) { instdone->instdone = intel_uncore_read(uncore, RING_INSTDONE(mmio_base)); if (engine->id != RCS0) return; instdone->slice_common = intel_uncore_read(uncore, GEN7_SC_INSTDONE); if (GRAPHICS_VER(i915) >= 12) { instdone->slice_common_extra[0] = intel_uncore_read(uncore, GEN12_SC_INSTDONE_EXTRA); instdone->slice_common_extra[1] = intel_uncore_read(uncore, GEN12_SC_INSTDONE_EXTRA2); } for_each_ss_steering(iter, engine->gt, slice, subslice) { instdone->sampler[slice][subslice] = intel_gt_mcr_read(engine->gt, GEN8_SAMPLER_INSTDONE, slice, subslice); instdone->row[slice][subslice] = intel_gt_mcr_read(engine->gt, GEN8_ROW_INSTDONE, slice, subslice); } if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55)) { for_each_ss_steering(iter, engine->gt, slice, subslice) instdone->geom_svg[slice][subslice] = intel_gt_mcr_read(engine->gt, XEHPG_INSTDONE_GEOM_SVG, slice, subslice); } } else if (GRAPHICS_VER(i915) >= 7) { instdone->instdone = intel_uncore_read(uncore, RING_INSTDONE(mmio_base)); if (engine->id != RCS0) return; instdone->slice_common = intel_uncore_read(uncore, GEN7_SC_INSTDONE); instdone->sampler[0][0] = intel_uncore_read(uncore, GEN7_SAMPLER_INSTDONE); instdone->row[0][0] = intel_uncore_read(uncore, GEN7_ROW_INSTDONE); } else if (GRAPHICS_VER(i915) >= 4) { instdone->instdone = intel_uncore_read(uncore, RING_INSTDONE(mmio_base)); if (engine->id == RCS0) /* HACK: Using the wrong struct member */ instdone->slice_common = intel_uncore_read(uncore, GEN4_INSTDONE1); } else { instdone->instdone = intel_uncore_read(uncore, GEN2_INSTDONE); } } static bool ring_is_idle(struct intel_engine_cs *engine) { bool idle = true; if (I915_SELFTEST_ONLY(!engine->mmio_base)) return true; if (!intel_engine_pm_get_if_awake(engine)) return true; /* First check that no commands are left in the ring */ if ((ENGINE_READ(engine, RING_HEAD) & HEAD_ADDR) != (ENGINE_READ(engine, RING_TAIL) & TAIL_ADDR)) idle = false; /* No bit for gen2, so assume the CS parser is idle */ if (GRAPHICS_VER(engine->i915) > 2 && !(ENGINE_READ(engine, RING_MI_MODE) & MODE_IDLE)) idle = false; intel_engine_pm_put(engine); return idle; } void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync) { struct tasklet_struct *t = &engine->sched_engine->tasklet; if (!t->callback) return; local_bh_disable(); if (tasklet_trylock(t)) { /* Must wait for any GPU reset in progress. */ if (__tasklet_is_enabled(t)) t->callback(t); tasklet_unlock(t); } local_bh_enable(); /* Synchronise and wait for the tasklet on another CPU */ if (sync) tasklet_unlock_wait(t); } /** * intel_engine_is_idle() - Report if the engine has finished process all work * @engine: the intel_engine_cs * * Return true if there are no requests pending, nothing left to be submitted * to hardware, and that the engine is idle. */ bool intel_engine_is_idle(struct intel_engine_cs *engine) { /* More white lies, if wedged, hw state is inconsistent */ if (intel_gt_is_wedged(engine->gt)) return true; if (!intel_engine_pm_is_awake(engine)) return true; /* Waiting to drain ELSP? */ intel_synchronize_hardirq(engine->i915); intel_engine_flush_submission(engine); /* ELSP is empty, but there are ready requests? E.g. after reset */ if (!i915_sched_engine_is_empty(engine->sched_engine)) return false; /* Ring stopped? */ return ring_is_idle(engine); } bool intel_engines_are_idle(struct intel_gt *gt) { struct intel_engine_cs *engine; enum intel_engine_id id; /* * If the driver is wedged, HW state may be very inconsistent and * report that it is still busy, even though we have stopped using it. */ if (intel_gt_is_wedged(gt)) return true; /* Already parked (and passed an idleness test); must still be idle */ if (!READ_ONCE(gt->awake)) return true; for_each_engine(engine, gt, id) { if (!intel_engine_is_idle(engine)) return false; } return true; } bool intel_engine_irq_enable(struct intel_engine_cs *engine) { if (!engine->irq_enable) return false; /* Caller disables interrupts */ spin_lock(engine->gt->irq_lock); engine->irq_enable(engine); spin_unlock(engine->gt->irq_lock); return true; } void intel_engine_irq_disable(struct intel_engine_cs *engine) { if (!engine->irq_disable) return; /* Caller disables interrupts */ spin_lock(engine->gt->irq_lock); engine->irq_disable(engine); spin_unlock(engine->gt->irq_lock); } void intel_engines_reset_default_submission(struct intel_gt *gt) { struct intel_engine_cs *engine; enum intel_engine_id id; for_each_engine(engine, gt, id) { if (engine->sanitize) engine->sanitize(engine); engine->set_default_submission(engine); } } bool intel_engine_can_store_dword(struct intel_engine_cs *engine) { switch (GRAPHICS_VER(engine->i915)) { case 2: return false; /* uses physical not virtual addresses */ case 3: /* maybe only uses physical not virtual addresses */ return !(IS_I915G(engine->i915) || IS_I915GM(engine->i915)); case 4: return !IS_I965G(engine->i915); /* who knows! */ case 6: return engine->class != VIDEO_DECODE_CLASS; /* b0rked */ default: return true; } } static struct intel_timeline *get_timeline(struct i915_request *rq) { struct intel_timeline *tl; /* * Even though we are holding the engine->sched_engine->lock here, there * is no control over the submission queue per-se and we are * inspecting the active state at a random point in time, with an * unknown queue. Play safe and make sure the timeline remains valid. * (Only being used for pretty printing, one extra kref shouldn't * cause a camel stampede!) */ rcu_read_lock(); tl = rcu_dereference(rq->timeline); if (!kref_get_unless_zero(&tl->kref)) tl = NULL; rcu_read_unlock(); return tl; } static int print_ring(char *buf, int sz, struct i915_request *rq) { int len = 0; if (!i915_request_signaled(rq)) { struct intel_timeline *tl = get_timeline(rq); len = scnprintf(buf, sz, "ring:{start:%08x, hwsp:%08x, seqno:%08x, runtime:%llums}, ", i915_ggtt_offset(rq->ring->vma), tl ? tl->hwsp_offset : 0, hwsp_seqno(rq), DIV_ROUND_CLOSEST_ULL(intel_context_get_total_runtime_ns(rq->context), 1000 * 1000)); if (tl) intel_timeline_put(tl); } return len; } static void hexdump(struct drm_printer *m, const void *buf, size_t len) { const size_t rowsize = 8 * sizeof(u32); const void *prev = NULL; bool skip = false; size_t pos; for (pos = 0; pos < len; pos += rowsize) { char line[128]; if (prev && !memcmp(prev, buf + pos, rowsize)) { if (!skip) { drm_printf(m, "*\n"); skip = true; } continue; } WARN_ON_ONCE(hex_dump_to_buffer(buf + pos, len - pos, rowsize, sizeof(u32), line, sizeof(line), false) >= sizeof(line)); drm_printf(m, "[%04zx] %s\n", pos, line); prev = buf + pos; skip = false; } } static const char *repr_timer(const struct timer_list *t) { if (!READ_ONCE(t->expires)) return "inactive"; if (timer_pending(t)) return "active"; return "expired"; } static void intel_engine_print_registers(struct intel_engine_cs *engine, struct drm_printer *m) { struct drm_i915_private *i915 = engine->i915; struct intel_engine_execlists * const execlists = &engine->execlists; u64 addr; if (engine->id == RENDER_CLASS && IS_GRAPHICS_VER(i915, 4, 7)) drm_printf(m, "\tCCID: 0x%08x\n", ENGINE_READ(engine, CCID)); if (HAS_EXECLISTS(i915)) { drm_printf(m, "\tEL_STAT_HI: 0x%08x\n", ENGINE_READ(engine, RING_EXECLIST_STATUS_HI)); drm_printf(m, "\tEL_STAT_LO: 0x%08x\n", ENGINE_READ(engine, RING_EXECLIST_STATUS_LO)); } drm_printf(m, "\tRING_START: 0x%08x\n", ENGINE_READ(engine, RING_START)); drm_printf(m, "\tRING_HEAD: 0x%08x\n", ENGINE_READ(engine, RING_HEAD) & HEAD_ADDR); drm_printf(m, "\tRING_TAIL: 0x%08x\n", ENGINE_READ(engine, RING_TAIL) & TAIL_ADDR); drm_printf(m, "\tRING_CTL: 0x%08x%s\n", ENGINE_READ(engine, RING_CTL), ENGINE_READ(engine, RING_CTL) & (RING_WAIT | RING_WAIT_SEMAPHORE) ? " [waiting]" : ""); if (GRAPHICS_VER(engine->i915) > 2) { drm_printf(m, "\tRING_MODE: 0x%08x%s\n", ENGINE_READ(engine, RING_MI_MODE), ENGINE_READ(engine, RING_MI_MODE) & (MODE_IDLE) ? " [idle]" : ""); } if (GRAPHICS_VER(i915) >= 6) { drm_printf(m, "\tRING_IMR: 0x%08x\n", ENGINE_READ(engine, RING_IMR)); drm_printf(m, "\tRING_ESR: 0x%08x\n", ENGINE_READ(engine, RING_ESR)); drm_printf(m, "\tRING_EMR: 0x%08x\n", ENGINE_READ(engine, RING_EMR)); drm_printf(m, "\tRING_EIR: 0x%08x\n", ENGINE_READ(engine, RING_EIR)); } addr = intel_engine_get_active_head(engine); drm_printf(m, "\tACTHD: 0x%08x_%08x\n", upper_32_bits(addr), lower_32_bits(addr)); addr = intel_engine_get_last_batch_head(engine); drm_printf(m, "\tBBADDR: 0x%08x_%08x\n", upper_32_bits(addr), lower_32_bits(addr)); if (GRAPHICS_VER(i915) >= 8) addr = ENGINE_READ64(engine, RING_DMA_FADD, RING_DMA_FADD_UDW); else if (GRAPHICS_VER(i915) >= 4) addr = ENGINE_READ(engine, RING_DMA_FADD); else addr = ENGINE_READ(engine, DMA_FADD_I8XX); drm_printf(m, "\tDMA_FADDR: 0x%08x_%08x\n", upper_32_bits(addr), lower_32_bits(addr)); if (GRAPHICS_VER(i915) >= 4) { drm_printf(m, "\tIPEIR: 0x%08x\n", ENGINE_READ(engine, RING_IPEIR)); drm_printf(m, "\tIPEHR: 0x%08x\n", ENGINE_READ(engine, RING_IPEHR)); } else { drm_printf(m, "\tIPEIR: 0x%08x\n", ENGINE_READ(engine, IPEIR)); drm_printf(m, "\tIPEHR: 0x%08x\n", ENGINE_READ(engine, IPEHR)); } if (HAS_EXECLISTS(i915) && !intel_engine_uses_guc(engine)) { struct i915_request * const *port, *rq; const u32 *hws = &engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX]; const u8 num_entries = execlists->csb_size; unsigned int idx; u8 read, write; drm_printf(m, "\tExeclist tasklet queued? %s (%s), preempt? %s, timeslice? %s\n", str_yes_no(test_bit(TASKLET_STATE_SCHED, &engine->sched_engine->tasklet.state)), str_enabled_disabled(!atomic_read(&engine->sched_engine->tasklet.count)), repr_timer(&engine->execlists.preempt), repr_timer(&engine->execlists.timer)); read = execlists->csb_head; write = READ_ONCE(*execlists->csb_write); drm_printf(m, "\tExeclist status: 0x%08x %08x; CSB read:%d, write:%d, entries:%d\n", ENGINE_READ(engine, RING_EXECLIST_STATUS_LO), ENGINE_READ(engine, RING_EXECLIST_STATUS_HI), read, write, num_entries); if (read >= num_entries) read = 0; if (write >= num_entries) write = 0; if (read > write) write += num_entries; while (read < write) { idx = ++read % num_entries; drm_printf(m, "\tExeclist CSB[%d]: 0x%08x, context: %d\n", idx, hws[idx * 2], hws[idx * 2 + 1]); } i915_sched_engine_active_lock_bh(engine->sched_engine); rcu_read_lock(); for (port = execlists->active; (rq = *port); port++) { char hdr[160]; int len; len = scnprintf(hdr, sizeof(hdr), "\t\tActive[%d]: ccid:%08x%s%s, ", (int)(port - execlists->active), rq->context->lrc.ccid, intel_context_is_closed(rq->context) ? "!" : "", intel_context_is_banned(rq->context) ? "*" : ""); len += print_ring(hdr + len, sizeof(hdr) - len, rq); scnprintf(hdr + len, sizeof(hdr) - len, "rq: "); i915_request_show(m, rq, hdr, 0); } for (port = execlists->pending; (rq = *port); port++) { char hdr[160]; int len; len = scnprintf(hdr, sizeof(hdr), "\t\tPending[%d]: ccid:%08x%s%s, ", (int)(port - execlists->pending), rq->context->lrc.ccid, intel_context_is_closed(rq->context) ? "!" : "", intel_context_is_banned(rq->context) ? "*" : ""); len += print_ring(hdr + len, sizeof(hdr) - len, rq); scnprintf(hdr + len, sizeof(hdr) - len, "rq: "); i915_request_show(m, rq, hdr, 0); } rcu_read_unlock(); i915_sched_engine_active_unlock_bh(engine->sched_engine); } else if (GRAPHICS_VER(i915) > 6) { drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n", ENGINE_READ(engine, RING_PP_DIR_BASE)); drm_printf(m, "\tPP_DIR_BASE_READ: 0x%08x\n", ENGINE_READ(engine, RING_PP_DIR_BASE_READ)); drm_printf(m, "\tPP_DIR_DCLV: 0x%08x\n", ENGINE_READ(engine, RING_PP_DIR_DCLV)); } } static void print_request_ring(struct drm_printer *m, struct i915_request *rq) { struct i915_vma_resource *vma_res = rq->batch_res; void *ring; int size; drm_printf(m, "[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]:\n", rq->head, rq->postfix, rq->tail, vma_res ? upper_32_bits(vma_res->start) : ~0u, vma_res ? lower_32_bits(vma_res->start) : ~0u); size = rq->tail - rq->head; if (rq->tail < rq->head) size += rq->ring->size; ring = kmalloc(size, GFP_ATOMIC); if (ring) { const void *vaddr = rq->ring->vaddr; unsigned int head = rq->head; unsigned int len = 0; if (rq->tail < head) { len = rq->ring->size - head; memcpy(ring, vaddr + head, len); head = 0; } memcpy(ring + len, vaddr + head, size - len); hexdump(m, ring, size); kfree(ring); } } static unsigned long read_ul(void *p, size_t x) { return *(unsigned long *)(p + x); } static void print_properties(struct intel_engine_cs *engine, struct drm_printer *m) { static const struct pmap { size_t offset; const char *name; } props[] = { #define P(x) { \ .offset = offsetof(typeof(engine->props), x), \ .name = #x \ } P(heartbeat_interval_ms), P(max_busywait_duration_ns), P(preempt_timeout_ms), P(stop_timeout_ms), P(timeslice_duration_ms), {}, #undef P }; const struct pmap *p; drm_printf(m, "\tProperties:\n"); for (p = props; p->name; p++) drm_printf(m, "\t\t%s: %lu [default %lu]\n", p->name, read_ul(&engine->props, p->offset), read_ul(&engine->defaults, p->offset)); } static void engine_dump_request(struct i915_request *rq, struct drm_printer *m, const char *msg) { struct intel_timeline *tl = get_timeline(rq); i915_request_show(m, rq, msg, 0); drm_printf(m, "\t\tring->start: 0x%08x\n", i915_ggtt_offset(rq->ring->vma)); drm_printf(m, "\t\tring->head: 0x%08x\n", rq->ring->head); drm_printf(m, "\t\tring->tail: 0x%08x\n", rq->ring->tail); drm_printf(m, "\t\tring->emit: 0x%08x\n", rq->ring->emit); drm_printf(m, "\t\tring->space: 0x%08x\n", rq->ring->space); if (tl) { drm_printf(m, "\t\tring->hwsp: 0x%08x\n", tl->hwsp_offset); intel_timeline_put(tl); } print_request_ring(m, rq); if (rq->context->lrc_reg_state) { drm_printf(m, "Logical Ring Context:\n"); hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE); } } void intel_engine_dump_active_requests(struct list_head *requests, struct i915_request *hung_rq, struct drm_printer *m) { struct i915_request *rq; const char *msg; enum i915_request_state state; list_for_each_entry(rq, requests, sched.link) { if (rq == hung_rq) continue; state = i915_test_request_state(rq); if (state < I915_REQUEST_QUEUED) continue; if (state == I915_REQUEST_ACTIVE) msg = "\t\tactive on engine"; else msg = "\t\tactive in queue"; engine_dump_request(rq, m, msg); } } static void engine_dump_active_requests(struct intel_engine_cs *engine, struct drm_printer *m) { struct intel_context *hung_ce = NULL; struct i915_request *hung_rq = NULL; /* * No need for an engine->irq_seqno_barrier() before the seqno reads. * The GPU is still running so requests are still executing and any * hardware reads will be out of date by the time they are reported. * But the intention here is just to report an instantaneous snapshot * so that's fine. */ intel_engine_get_hung_entity(engine, &hung_ce, &hung_rq); drm_printf(m, "\tRequests:\n"); if (hung_rq) engine_dump_request(hung_rq, m, "\t\thung"); else if (hung_ce) drm_printf(m, "\t\tGot hung ce but no hung rq!\n"); if (intel_uc_uses_guc_submission(&engine->gt->uc)) intel_guc_dump_active_requests(engine, hung_rq, m); else intel_execlists_dump_active_requests(engine, hung_rq, m); if (hung_rq) i915_request_put(hung_rq); } void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m, const char *header, ...) { struct i915_gpu_error * const error = &engine->i915->gpu_error; struct i915_request *rq; intel_wakeref_t wakeref; ktime_t dummy; if (header) { va_list ap; va_start(ap, header); drm_vprintf(m, header, &ap); va_end(ap); } if (intel_gt_is_wedged(engine->gt)) drm_printf(m, "*** WEDGED ***\n"); drm_printf(m, "\tAwake? %d\n", atomic_read(&engine->wakeref.count)); drm_printf(m, "\tBarriers?: %s\n", str_yes_no(!llist_empty(&engine->barrier_tasks))); drm_printf(m, "\tLatency: %luus\n", ewma__engine_latency_read(&engine->latency)); if (intel_engine_supports_stats(engine)) drm_printf(m, "\tRuntime: %llums\n", ktime_to_ms(intel_engine_get_busy_time(engine, &dummy))); drm_printf(m, "\tForcewake: %x domains, %d active\n", engine->fw_domain, READ_ONCE(engine->fw_active)); rcu_read_lock(); rq = READ_ONCE(engine->heartbeat.systole); if (rq) drm_printf(m, "\tHeartbeat: %d ms ago\n", jiffies_to_msecs(jiffies - rq->emitted_jiffies)); rcu_read_unlock(); drm_printf(m, "\tReset count: %d (global %d)\n", i915_reset_engine_count(error, engine), i915_reset_count(error)); print_properties(engine, m); engine_dump_active_requests(engine, m); drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base); wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm); if (wakeref) { intel_engine_print_registers(engine, m); intel_runtime_pm_put(engine->uncore->rpm, wakeref); } else { drm_printf(m, "\tDevice is asleep; skipping register dump\n"); } intel_execlists_show_requests(engine, m, i915_request_show, 8); drm_printf(m, "HWSP:\n"); hexdump(m, engine->status_page.addr, PAGE_SIZE); drm_printf(m, "Idle? %s\n", str_yes_no(intel_engine_is_idle(engine))); intel_engine_print_breadcrumbs(engine, m); } /** * intel_engine_get_busy_time() - Return current accumulated engine busyness * @engine: engine to report on * @now: monotonic timestamp of sampling * * Returns accumulated time @engine was busy since engine stats were enabled. */ ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine, ktime_t *now) { return engine->busyness(engine, now); } struct intel_context * intel_engine_create_virtual(struct intel_engine_cs **siblings, unsigned int count, unsigned long flags) { if (count == 0) return ERR_PTR(-EINVAL); if (count == 1 && !(flags & FORCE_VIRTUAL)) return intel_context_create(siblings[0]); GEM_BUG_ON(!siblings[0]->cops->create_virtual); return siblings[0]->cops->create_virtual(siblings, count, flags); } static struct i915_request *engine_execlist_find_hung_request(struct intel_engine_cs *engine) { struct i915_request *request, *active = NULL; /* * This search does not work in GuC submission mode. However, the GuC * will report the hanging context directly to the driver itself. So * the driver should never get here when in GuC mode. */ GEM_BUG_ON(intel_uc_uses_guc_submission(&engine->gt->uc)); /* * We are called by the error capture, reset and to dump engine * state at random points in time. In particular, note that neither is * crucially ordered with an interrupt. After a hang, the GPU is dead * and we assume that no more writes can happen (we waited long enough * for all writes that were in transaction to be flushed) - adding an * extra delay for a recent interrupt is pointless. Hence, we do * not need an engine->irq_seqno_barrier() before the seqno reads. * At all other times, we must assume the GPU is still running, but * we only care about the snapshot of this moment. */ lockdep_assert_held(&engine->sched_engine->lock); rcu_read_lock(); request = execlists_active(&engine->execlists); if (request) { struct intel_timeline *tl = request->context->timeline; list_for_each_entry_from_reverse(request, &tl->requests, link) { if (__i915_request_is_complete(request)) break; active = request; } } rcu_read_unlock(); if (active) return active; list_for_each_entry(request, &engine->sched_engine->requests, sched.link) { if (i915_test_request_state(request) != I915_REQUEST_ACTIVE) continue; active = request; break; } return active; } void intel_engine_get_hung_entity(struct intel_engine_cs *engine, struct intel_context **ce, struct i915_request **rq) { unsigned long flags; *ce = intel_engine_get_hung_context(engine); if (*ce) { intel_engine_clear_hung_context(engine); *rq = intel_context_get_active_request(*ce); return; } /* * Getting here with GuC enabled means it is a forced error capture * with no actual hang. So, no need to attempt the execlist search. */ if (intel_uc_uses_guc_submission(&engine->gt->uc)) return; spin_lock_irqsave(&engine->sched_engine->lock, flags); *rq = engine_execlist_find_hung_request(engine); if (*rq) *rq = i915_request_get_rcu(*rq); spin_unlock_irqrestore(&engine->sched_engine->lock, flags); } void xehp_enable_ccs_engines(struct intel_engine_cs *engine) { /* * If there are any non-fused-off CCS engines, we need to enable CCS * support in the RCU_MODE register. This only needs to be done once, * so for simplicity we'll take care of this in the RCS engine's * resume handler; since the RCS and all CCS engines belong to the * same reset domain and are reset together, this will also take care * of re-applying the setting after i915-triggered resets. */ if (!CCS_MASK(engine->gt)) return; intel_uncore_write(engine->uncore, GEN12_RCU_MODE, _MASKED_BIT_ENABLE(GEN12_RCU_MODE_CCS_ENABLE)); } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "mock_engine.c" #include "selftest_engine.c" #include "selftest_engine_cs.c" #endif