/* * Copyright © 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #include #include "i915_drv.h" #include "i915_vgpu.h" #include "intel_ringbuffer.h" #include "intel_lrc.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 GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE) #define GEN9_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE) #define GEN10_LR_CONTEXT_RENDER_SIZE (18 * PAGE_SIZE) #define GEN8_LR_CONTEXT_OTHER_SIZE ( 2 * PAGE_SIZE) struct engine_class_info { const char *name; int (*init_legacy)(struct intel_engine_cs *engine); int (*init_execlists)(struct intel_engine_cs *engine); u8 uabi_class; }; static const struct engine_class_info intel_engine_classes[] = { [RENDER_CLASS] = { .name = "rcs", .init_execlists = logical_render_ring_init, .init_legacy = intel_init_render_ring_buffer, .uabi_class = I915_ENGINE_CLASS_RENDER, }, [COPY_ENGINE_CLASS] = { .name = "bcs", .init_execlists = logical_xcs_ring_init, .init_legacy = intel_init_blt_ring_buffer, .uabi_class = I915_ENGINE_CLASS_COPY, }, [VIDEO_DECODE_CLASS] = { .name = "vcs", .init_execlists = logical_xcs_ring_init, .init_legacy = intel_init_bsd_ring_buffer, .uabi_class = I915_ENGINE_CLASS_VIDEO, }, [VIDEO_ENHANCEMENT_CLASS] = { .name = "vecs", .init_execlists = logical_xcs_ring_init, .init_legacy = intel_init_vebox_ring_buffer, .uabi_class = I915_ENGINE_CLASS_VIDEO_ENHANCE, }, }; struct engine_info { unsigned int hw_id; unsigned int uabi_id; u8 class; u8 instance; u32 mmio_base; unsigned irq_shift; }; static const struct engine_info intel_engines[] = { [RCS] = { .hw_id = RCS_HW, .uabi_id = I915_EXEC_RENDER, .class = RENDER_CLASS, .instance = 0, .mmio_base = RENDER_RING_BASE, .irq_shift = GEN8_RCS_IRQ_SHIFT, }, [BCS] = { .hw_id = BCS_HW, .uabi_id = I915_EXEC_BLT, .class = COPY_ENGINE_CLASS, .instance = 0, .mmio_base = BLT_RING_BASE, .irq_shift = GEN8_BCS_IRQ_SHIFT, }, [VCS] = { .hw_id = VCS_HW, .uabi_id = I915_EXEC_BSD, .class = VIDEO_DECODE_CLASS, .instance = 0, .mmio_base = GEN6_BSD_RING_BASE, .irq_shift = GEN8_VCS1_IRQ_SHIFT, }, [VCS2] = { .hw_id = VCS2_HW, .uabi_id = I915_EXEC_BSD, .class = VIDEO_DECODE_CLASS, .instance = 1, .mmio_base = GEN8_BSD2_RING_BASE, .irq_shift = GEN8_VCS2_IRQ_SHIFT, }, [VECS] = { .hw_id = VECS_HW, .uabi_id = I915_EXEC_VEBOX, .class = VIDEO_ENHANCEMENT_CLASS, .instance = 0, .mmio_base = VEBOX_RING_BASE, .irq_shift = GEN8_VECS_IRQ_SHIFT, }, }; /** * ___intel_engine_context_size() - return the size of the context for an engine * @dev_priv: i915 device private * @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. */ static u32 __intel_engine_context_size(struct drm_i915_private *dev_priv, u8 class) { u32 cxt_size; BUILD_BUG_ON(I915_GTT_PAGE_SIZE != PAGE_SIZE); switch (class) { case RENDER_CLASS: switch (INTEL_GEN(dev_priv)) { default: MISSING_CASE(INTEL_GEN(dev_priv)); case 10: return GEN10_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(dev_priv)) return HSW_CXT_TOTAL_SIZE; cxt_size = I915_READ(GEN7_CXT_SIZE); return round_up(GEN7_CXT_TOTAL_SIZE(cxt_size) * 64, PAGE_SIZE); case 6: cxt_size = I915_READ(CXT_SIZE); return round_up(GEN6_CXT_TOTAL_SIZE(cxt_size) * 64, PAGE_SIZE); case 5: case 4: case 3: case 2: /* For the special day when i810 gets merged. */ case 1: return 0; } break; default: MISSING_CASE(class); case VIDEO_DECODE_CLASS: case VIDEO_ENHANCEMENT_CLASS: case COPY_ENGINE_CLASS: if (INTEL_GEN(dev_priv) < 8) return 0; return GEN8_LR_CONTEXT_OTHER_SIZE; } } static int intel_engine_setup(struct drm_i915_private *dev_priv, enum intel_engine_id id) { const struct engine_info *info = &intel_engines[id]; const struct engine_class_info *class_info; struct intel_engine_cs *engine; GEM_BUG_ON(info->class >= ARRAY_SIZE(intel_engine_classes)); class_info = &intel_engine_classes[info->class]; if (GEM_WARN_ON(info->class > MAX_ENGINE_CLASS)) return -EINVAL; if (GEM_WARN_ON(info->instance > MAX_ENGINE_INSTANCE)) return -EINVAL; if (GEM_WARN_ON(dev_priv->engine_class[info->class][info->instance])) return -EINVAL; GEM_BUG_ON(dev_priv->engine[id]); engine = kzalloc(sizeof(*engine), GFP_KERNEL); if (!engine) return -ENOMEM; engine->id = id; engine->i915 = dev_priv; WARN_ON(snprintf(engine->name, sizeof(engine->name), "%s%u", class_info->name, info->instance) >= sizeof(engine->name)); engine->hw_id = engine->guc_id = info->hw_id; engine->mmio_base = info->mmio_base; engine->irq_shift = info->irq_shift; engine->class = info->class; engine->instance = info->instance; engine->uabi_id = info->uabi_id; engine->uabi_class = class_info->uabi_class; engine->context_size = __intel_engine_context_size(dev_priv, engine->class); if (WARN_ON(engine->context_size > BIT(20))) engine->context_size = 0; /* Nothing to do here, execute in order of dependencies */ engine->schedule = NULL; spin_lock_init(&engine->stats.lock); ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier); dev_priv->engine_class[info->class][info->instance] = engine; dev_priv->engine[id] = engine; return 0; } /** * intel_engines_init_mmio() - allocate and prepare the Engine Command Streamers * @dev_priv: i915 device private * * Return: non-zero if the initialization failed. */ int intel_engines_init_mmio(struct drm_i915_private *dev_priv) { struct intel_device_info *device_info = mkwrite_device_info(dev_priv); const unsigned int ring_mask = INTEL_INFO(dev_priv)->ring_mask; struct intel_engine_cs *engine; enum intel_engine_id id; unsigned int mask = 0; unsigned int i; int err; WARN_ON(ring_mask == 0); WARN_ON(ring_mask & GENMASK(sizeof(mask) * BITS_PER_BYTE - 1, I915_NUM_ENGINES)); for (i = 0; i < ARRAY_SIZE(intel_engines); i++) { if (!HAS_ENGINE(dev_priv, i)) continue; err = intel_engine_setup(dev_priv, i); if (err) goto cleanup; mask |= ENGINE_MASK(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 (WARN_ON(mask != ring_mask)) device_info->ring_mask = mask; /* We always presume we have at least RCS available for later probing */ if (WARN_ON(!HAS_ENGINE(dev_priv, RCS))) { err = -ENODEV; goto cleanup; } device_info->num_rings = hweight32(mask); i915_check_and_clear_faults(dev_priv); return 0; cleanup: for_each_engine(engine, dev_priv, id) kfree(engine); return err; } /** * intel_engines_init() - init the Engine Command Streamers * @dev_priv: i915 device private * * Return: non-zero if the initialization failed. */ int intel_engines_init(struct drm_i915_private *dev_priv) { struct intel_engine_cs *engine; enum intel_engine_id id, err_id; int err; for_each_engine(engine, dev_priv, id) { const struct engine_class_info *class_info = &intel_engine_classes[engine->class]; int (*init)(struct intel_engine_cs *engine); if (HAS_EXECLISTS(dev_priv)) init = class_info->init_execlists; else init = class_info->init_legacy; err = -EINVAL; err_id = id; if (GEM_WARN_ON(!init)) goto cleanup; err = init(engine); if (err) goto cleanup; GEM_BUG_ON(!engine->submit_request); } return 0; cleanup: for_each_engine(engine, dev_priv, id) { if (id >= err_id) { kfree(engine); dev_priv->engine[id] = NULL; } else { dev_priv->gt.cleanup_engine(engine); } } return err; } void intel_engine_init_global_seqno(struct intel_engine_cs *engine, u32 seqno) { struct drm_i915_private *dev_priv = engine->i915; /* Our semaphore implementation is strictly monotonic (i.e. we proceed * so long as the semaphore value in the register/page is greater * than the sync value), so whenever we reset the seqno, * so long as we reset the tracking semaphore value to 0, it will * always be before the next request's seqno. If we don't reset * the semaphore value, then when the seqno moves backwards all * future waits will complete instantly (causing rendering corruption). */ if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) { I915_WRITE(RING_SYNC_0(engine->mmio_base), 0); I915_WRITE(RING_SYNC_1(engine->mmio_base), 0); if (HAS_VEBOX(dev_priv)) I915_WRITE(RING_SYNC_2(engine->mmio_base), 0); } intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno); clear_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted); /* After manually advancing the seqno, fake the interrupt in case * there are any waiters for that seqno. */ intel_engine_wakeup(engine); GEM_BUG_ON(intel_engine_get_seqno(engine) != seqno); } static void intel_engine_init_timeline(struct intel_engine_cs *engine) { engine->timeline = &engine->i915->gt.global_timeline.engine[engine->id]; } static bool csb_force_mmio(struct drm_i915_private *i915) { /* * IOMMU adds unpredictable latency causing the CSB write (from the * GPU into the HWSP) to only be visible some time after the interrupt * (missed breadcrumb syndrome). */ if (intel_vtd_active()) return true; /* Older GVT emulation depends upon intercepting CSB mmio */ if (intel_vgpu_active(i915) && !intel_vgpu_has_hwsp_emulation(i915)) return true; return false; } static void intel_engine_init_execlist(struct intel_engine_cs *engine) { struct intel_engine_execlists * const execlists = &engine->execlists; execlists->csb_use_mmio = csb_force_mmio(engine->i915); execlists->port_mask = 1; BUILD_BUG_ON_NOT_POWER_OF_2(execlists_num_ports(execlists)); GEM_BUG_ON(execlists_num_ports(execlists) > EXECLIST_MAX_PORTS); execlists->queue = RB_ROOT; execlists->first = NULL; } /** * intel_engines_setup_common - setup engine state not requiring hw access * @engine: Engine to setup. * * Initializes @engine@ structure members shared between legacy and execlists * submission modes which do not require hardware access. * * Typically done early in the submission mode specific engine setup stage. */ void intel_engine_setup_common(struct intel_engine_cs *engine) { intel_engine_init_execlist(engine); intel_engine_init_timeline(engine); intel_engine_init_hangcheck(engine); i915_gem_batch_pool_init(engine, &engine->batch_pool); intel_engine_init_cmd_parser(engine); } int intel_engine_create_scratch(struct intel_engine_cs *engine, int size) { struct drm_i915_gem_object *obj; struct i915_vma *vma; int ret; WARN_ON(engine->scratch); obj = i915_gem_object_create_stolen(engine->i915, size); if (!obj) obj = i915_gem_object_create_internal(engine->i915, size); if (IS_ERR(obj)) { DRM_ERROR("Failed to allocate scratch page\n"); return PTR_ERR(obj); } vma = i915_vma_instance(obj, &engine->i915->ggtt.base, NULL); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto err_unref; } ret = i915_vma_pin(vma, 0, 4096, PIN_GLOBAL | PIN_HIGH); if (ret) goto err_unref; engine->scratch = vma; DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08x\n", engine->name, i915_ggtt_offset(vma)); return 0; err_unref: i915_gem_object_put(obj); return ret; } static void intel_engine_cleanup_scratch(struct intel_engine_cs *engine) { i915_vma_unpin_and_release(&engine->scratch); } static void cleanup_phys_status_page(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; if (!dev_priv->status_page_dmah) return; drm_pci_free(&dev_priv->drm, dev_priv->status_page_dmah); engine->status_page.page_addr = NULL; } static void cleanup_status_page(struct intel_engine_cs *engine) { struct i915_vma *vma; struct drm_i915_gem_object *obj; vma = fetch_and_zero(&engine->status_page.vma); if (!vma) return; obj = vma->obj; i915_vma_unpin(vma); i915_vma_close(vma); i915_gem_object_unpin_map(obj); __i915_gem_object_release_unless_active(obj); } static int init_status_page(struct intel_engine_cs *engine) { struct drm_i915_gem_object *obj; struct i915_vma *vma; unsigned int flags; void *vaddr; int ret; obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE); if (IS_ERR(obj)) { DRM_ERROR("Failed to allocate status page\n"); return PTR_ERR(obj); } ret = i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); if (ret) goto err; vma = i915_vma_instance(obj, &engine->i915->ggtt.base, NULL); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto err; } flags = PIN_GLOBAL; if (!HAS_LLC(engine->i915)) /* 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; ret = i915_vma_pin(vma, 0, 4096, flags); 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.vma = vma; engine->status_page.ggtt_offset = i915_ggtt_offset(vma); engine->status_page.page_addr = memset(vaddr, 0, PAGE_SIZE); DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n", engine->name, i915_ggtt_offset(vma)); return 0; err_unpin: i915_vma_unpin(vma); err: i915_gem_object_put(obj); return ret; } static int init_phys_status_page(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; GEM_BUG_ON(engine->id != RCS); dev_priv->status_page_dmah = drm_pci_alloc(&dev_priv->drm, PAGE_SIZE, PAGE_SIZE); if (!dev_priv->status_page_dmah) return -ENOMEM; engine->status_page.page_addr = dev_priv->status_page_dmah->vaddr; memset(engine->status_page.page_addr, 0, PAGE_SIZE); return 0; } /** * intel_engines_init_common - initialize cengine 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. */ int intel_engine_init_common(struct intel_engine_cs *engine) { struct intel_ring *ring; 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. */ ring = engine->context_pin(engine, engine->i915->kernel_context); if (IS_ERR(ring)) return PTR_ERR(ring); /* * Similarly the preempt context must always be available so that * we can interrupt the engine at any time. */ if (HAS_LOGICAL_RING_PREEMPTION(engine->i915)) { ring = engine->context_pin(engine, engine->i915->preempt_context); if (IS_ERR(ring)) { ret = PTR_ERR(ring); goto err_unpin_kernel; } } ret = intel_engine_init_breadcrumbs(engine); if (ret) goto err_unpin_preempt; if (HWS_NEEDS_PHYSICAL(engine->i915)) ret = init_phys_status_page(engine); else ret = init_status_page(engine); if (ret) goto err_breadcrumbs; return 0; err_breadcrumbs: intel_engine_fini_breadcrumbs(engine); err_unpin_preempt: if (HAS_LOGICAL_RING_PREEMPTION(engine->i915)) engine->context_unpin(engine, engine->i915->preempt_context); err_unpin_kernel: engine->context_unpin(engine, engine->i915->kernel_context); return ret; } /** * intel_engines_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) { intel_engine_cleanup_scratch(engine); if (HWS_NEEDS_PHYSICAL(engine->i915)) cleanup_phys_status_page(engine); else cleanup_status_page(engine); intel_engine_fini_breadcrumbs(engine); intel_engine_cleanup_cmd_parser(engine); i915_gem_batch_pool_fini(&engine->batch_pool); if (engine->default_state) i915_gem_object_put(engine->default_state); if (HAS_LOGICAL_RING_PREEMPTION(engine->i915)) engine->context_unpin(engine, engine->i915->preempt_context); engine->context_unpin(engine, engine->i915->kernel_context); } u64 intel_engine_get_active_head(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; u64 acthd; if (INTEL_GEN(dev_priv) >= 8) acthd = I915_READ64_2x32(RING_ACTHD(engine->mmio_base), RING_ACTHD_UDW(engine->mmio_base)); else if (INTEL_GEN(dev_priv) >= 4) acthd = I915_READ(RING_ACTHD(engine->mmio_base)); else acthd = I915_READ(ACTHD); return acthd; } u64 intel_engine_get_last_batch_head(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; u64 bbaddr; if (INTEL_GEN(dev_priv) >= 8) bbaddr = I915_READ64_2x32(RING_BBADDR(engine->mmio_base), RING_BBADDR_UDW(engine->mmio_base)); else bbaddr = I915_READ(RING_BBADDR(engine->mmio_base)); return bbaddr; } const char *i915_cache_level_str(struct drm_i915_private *i915, int type) { switch (type) { case I915_CACHE_NONE: return " uncached"; case I915_CACHE_LLC: return HAS_LLC(i915) ? " LLC" : " snooped"; case I915_CACHE_L3_LLC: return " L3+LLC"; case I915_CACHE_WT: return " WT"; default: return ""; } } static inline uint32_t read_subslice_reg(struct drm_i915_private *dev_priv, int slice, int subslice, i915_reg_t reg) { uint32_t mcr; uint32_t ret; enum forcewake_domains fw_domains; fw_domains = intel_uncore_forcewake_for_reg(dev_priv, reg, FW_REG_READ); fw_domains |= intel_uncore_forcewake_for_reg(dev_priv, GEN8_MCR_SELECTOR, FW_REG_READ | FW_REG_WRITE); spin_lock_irq(&dev_priv->uncore.lock); intel_uncore_forcewake_get__locked(dev_priv, fw_domains); mcr = I915_READ_FW(GEN8_MCR_SELECTOR); /* * The HW expects the slice and sublice selectors to be reset to 0 * after reading out the registers. */ WARN_ON_ONCE(mcr & (GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK)); mcr &= ~(GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK); mcr |= GEN8_MCR_SLICE(slice) | GEN8_MCR_SUBSLICE(subslice); I915_WRITE_FW(GEN8_MCR_SELECTOR, mcr); ret = I915_READ_FW(reg); mcr &= ~(GEN8_MCR_SLICE_MASK | GEN8_MCR_SUBSLICE_MASK); I915_WRITE_FW(GEN8_MCR_SELECTOR, mcr); intel_uncore_forcewake_put__locked(dev_priv, fw_domains); spin_unlock_irq(&dev_priv->uncore.lock); return ret; } /* NB: please notice the memset */ void intel_engine_get_instdone(struct intel_engine_cs *engine, struct intel_instdone *instdone) { struct drm_i915_private *dev_priv = engine->i915; u32 mmio_base = engine->mmio_base; int slice; int subslice; memset(instdone, 0, sizeof(*instdone)); switch (INTEL_GEN(dev_priv)) { default: instdone->instdone = I915_READ(RING_INSTDONE(mmio_base)); if (engine->id != RCS) break; instdone->slice_common = I915_READ(GEN7_SC_INSTDONE); for_each_instdone_slice_subslice(dev_priv, slice, subslice) { instdone->sampler[slice][subslice] = read_subslice_reg(dev_priv, slice, subslice, GEN7_SAMPLER_INSTDONE); instdone->row[slice][subslice] = read_subslice_reg(dev_priv, slice, subslice, GEN7_ROW_INSTDONE); } break; case 7: instdone->instdone = I915_READ(RING_INSTDONE(mmio_base)); if (engine->id != RCS) break; instdone->slice_common = I915_READ(GEN7_SC_INSTDONE); instdone->sampler[0][0] = I915_READ(GEN7_SAMPLER_INSTDONE); instdone->row[0][0] = I915_READ(GEN7_ROW_INSTDONE); break; case 6: case 5: case 4: instdone->instdone = I915_READ(RING_INSTDONE(mmio_base)); if (engine->id == RCS) /* HACK: Using the wrong struct member */ instdone->slice_common = I915_READ(GEN4_INSTDONE1); break; case 3: case 2: instdone->instdone = I915_READ(GEN2_INSTDONE); break; } } static int wa_add(struct drm_i915_private *dev_priv, i915_reg_t addr, const u32 mask, const u32 val) { const u32 idx = dev_priv->workarounds.count; if (WARN_ON(idx >= I915_MAX_WA_REGS)) return -ENOSPC; dev_priv->workarounds.reg[idx].addr = addr; dev_priv->workarounds.reg[idx].value = val; dev_priv->workarounds.reg[idx].mask = mask; dev_priv->workarounds.count++; return 0; } #define WA_REG(addr, mask, val) do { \ const int r = wa_add(dev_priv, (addr), (mask), (val)); \ if (r) \ return r; \ } while (0) #define WA_SET_BIT_MASKED(addr, mask) \ WA_REG(addr, (mask), _MASKED_BIT_ENABLE(mask)) #define WA_CLR_BIT_MASKED(addr, mask) \ WA_REG(addr, (mask), _MASKED_BIT_DISABLE(mask)) #define WA_SET_FIELD_MASKED(addr, mask, value) \ WA_REG(addr, mask, _MASKED_FIELD(mask, value)) static int wa_ring_whitelist_reg(struct intel_engine_cs *engine, i915_reg_t reg) { struct drm_i915_private *dev_priv = engine->i915; struct i915_workarounds *wa = &dev_priv->workarounds; const uint32_t index = wa->hw_whitelist_count[engine->id]; if (WARN_ON(index >= RING_MAX_NONPRIV_SLOTS)) return -EINVAL; I915_WRITE(RING_FORCE_TO_NONPRIV(engine->mmio_base, index), i915_mmio_reg_offset(reg)); wa->hw_whitelist_count[engine->id]++; return 0; } static int gen8_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; 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); return 0; } static int bdw_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen8_init_workarounds(engine); if (ret) return ret; /* WaDisableThreadStallDopClockGating:bdw (pre-production) */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); /* WaDisableDopClockGating:bdw * * Also see the related UCGTCL1 write in broadwell_init_clock_gating() * to disable EUTC clock gating. */ WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, DOP_CLOCK_GATING_DISABLE); WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, GEN8_SAMPLER_POWER_BYPASS_DIS); WA_SET_BIT_MASKED(HDC_CHICKEN0, /* WaForceContextSaveRestoreNonCoherent:bdw */ HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT | /* WaDisableFenceDestinationToSLM:bdw (pre-prod) */ (IS_BDW_GT3(dev_priv) ? HDC_FENCE_DEST_SLM_DISABLE : 0)); return 0; } static int chv_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen8_init_workarounds(engine); if (ret) return ret; /* 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); return 0; } static int gen9_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; /* WaConextSwitchWithConcurrentTLBInvalidate:skl,bxt,kbl,glk,cfl */ I915_WRITE(GEN9_CSFE_CHICKEN1_RCS, _MASKED_BIT_ENABLE(GEN9_PREEMPT_GPGPU_SYNC_SWITCH_DISABLE)); /* WaEnableLbsSlaRetryTimerDecrement:skl,bxt,kbl,glk,cfl */ I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) | GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE); /* WaDisableKillLogic:bxt,skl,kbl */ if (!IS_COFFEELAKE(dev_priv)) I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | ECOCHK_DIS_TLB); if (HAS_LLC(dev_priv)) { /* 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); I915_WRITE(MMCD_MISC_CTRL, I915_READ(MMCD_MISC_CTRL) | MMCD_PCLA | MMCD_HOTSPOT_EN); } /* WaClearFlowControlGpgpuContextSave:skl,bxt,kbl,glk,cfl */ /* WaDisablePartialInstShootdown:skl,bxt,kbl,glk,cfl */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, FLOW_CONTROL_ENABLE | PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE); /* Syncing dependencies between camera and graphics:skl,bxt,kbl */ if (!IS_COFFEELAKE(dev_priv)) WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC); /* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk,cfl */ /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, GEN9_ENABLE_YV12_BUGFIX | GEN9_ENABLE_GPGPU_PREEMPTION); /* Wa4x4STCOptimizationDisable:skl,bxt,kbl,glk,cfl */ /* WaDisablePartialResolveInVc:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(CACHE_MODE_1, (GEN8_4x4_STC_OPTIMIZATION_DISABLE | GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE)); /* WaCcsTlbPrefetchDisable:skl,bxt,kbl,glk,cfl */ WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5, GEN9_CCS_TLB_PREFETCH_ENABLE); /* WaForceContextSaveRestoreNonCoherent:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT | HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE); /* WaForceEnableNonCoherent and WaDisableHDCInvalidation are * both tied to WaForceContextSaveRestoreNonCoherent * in some hsds for skl. We keep the tie for all gen9. The * documentation is a bit hazy and so we want to get common behaviour, * even though there is no clear evidence we would need both on kbl/bxt. * This area has been source of system hangs so we play it safe * and mimic the skl regardless of what bspec says. * * Use Force Non-Coherent whenever executing a 3D context. This * is a workaround for a possible hang in the unlikely event * a TLB invalidation occurs during a PSD flush. */ /* WaForceEnableNonCoherent:skl,bxt,kbl,cfl */ WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_FORCE_NON_COHERENT); /* WaDisableHDCInvalidation:skl,bxt,kbl,cfl */ I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | BDW_DISABLE_HDC_INVALIDATION); /* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt,kbl,cfl */ if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) 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); /* WaProgramL3SqcReg1DefaultForPerf:bxt,glk */ if (IS_GEN9_LP(dev_priv)) { u32 val = I915_READ(GEN8_L3SQCREG1); val &= ~L3_PRIO_CREDITS_MASK; val |= L3_GENERAL_PRIO_CREDITS(62) | L3_HIGH_PRIO_CREDITS(2); I915_WRITE(GEN8_L3SQCREG1, val); } /* WaOCLCoherentLineFlush:skl,bxt,kbl,cfl */ I915_WRITE(GEN8_L3SQCREG4, (I915_READ(GEN8_L3SQCREG4) | GEN8_LQSC_FLUSH_COHERENT_LINES)); /* * 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); /* WaVFEStateAfterPipeControlwithMediaStateClear:skl,bxt,glk,cfl */ ret = wa_ring_whitelist_reg(engine, GEN9_CTX_PREEMPT_REG); if (ret) return ret; /* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */ I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1, _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL)); ret = wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1); if (ret) return ret; /* WaAllowUMDToModifyHDCChicken1:skl,bxt,kbl,glk,cfl */ ret = wa_ring_whitelist_reg(engine, GEN8_HDC_CHICKEN1); if (ret) return ret; return 0; } static int skl_tune_iz_hashing(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = 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(INTEL_INFO(dev_priv)->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(INTEL_INFO(dev_priv)->sseu.subslice_7eu[i]) - 1; vals[i] = 3 - ss; } if (vals[0] == 0 && vals[1] == 0 && vals[2] == 0) return 0; /* 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])); return 0; } static int skl_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen9_init_workarounds(engine); if (ret) return ret; /* WaEnableGapsTsvCreditFix:skl */ I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE)); /* WaDisableGafsUnitClkGating:skl */ I915_WRITE(GEN7_UCGCTL4, (I915_READ(GEN7_UCGCTL4) | GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE)); /* WaInPlaceDecompressionHang:skl */ if (IS_SKL_REVID(dev_priv, SKL_REVID_H0, REVID_FOREVER)) I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA, (I915_READ(GEN9_GAMT_ECO_REG_RW_IA) | GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS)); /* WaDisableLSQCROPERFforOCL:skl */ ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4); if (ret) return ret; return skl_tune_iz_hashing(engine); } static int bxt_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen9_init_workarounds(engine); if (ret) return ret; /* WaDisableThreadStallDopClockGating:bxt */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE); /* WaDisablePooledEuLoadBalancingFix:bxt */ I915_WRITE(FF_SLICE_CS_CHICKEN2, _MASKED_BIT_ENABLE(GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE)); /* WaToEnableHwFixForPushConstHWBug:bxt */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaInPlaceDecompressionHang:bxt */ I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA, (I915_READ(GEN9_GAMT_ECO_REG_RW_IA) | GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS)); return 0; } static int cnl_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; /* WaDisableI2mCycleOnWRPort:cnl (pre-prod) */ if (IS_CNL_REVID(dev_priv, CNL_REVID_B0, CNL_REVID_B0)) I915_WRITE(GAMT_CHKN_BIT_REG, (I915_READ(GAMT_CHKN_BIT_REG) | GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT)); /* WaForceContextSaveRestoreNonCoherent:cnl */ WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0, HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT); /* WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod) */ if (IS_CNL_REVID(dev_priv, CNL_REVID_B0, CNL_REVID_B0)) WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, THROTTLE_12_5); /* WaDisableReplayBufferBankArbitrationOptimization:cnl */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaDisableEnhancedSBEVertexCaching:cnl (pre-prod) */ if (IS_CNL_REVID(dev_priv, 0, CNL_REVID_B0)) WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE); /* WaInPlaceDecompressionHang:cnl */ I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA, (I915_READ(GEN9_GAMT_ECO_REG_RW_IA) | GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS)); /* 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); /* WaEnablePreemptionGranularityControlByUMD:cnl */ I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1, _MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL)); ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1); if (ret) return ret; /* WaDisableEarlyEOT:cnl */ WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, DISABLE_EARLY_EOT); return 0; } static int kbl_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen9_init_workarounds(engine); if (ret) return ret; /* WaEnableGapsTsvCreditFix:kbl */ I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE)); /* WaDisableDynamicCreditSharing:kbl */ if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0)) I915_WRITE(GAMT_CHKN_BIT_REG, (I915_READ(GAMT_CHKN_BIT_REG) | GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING)); /* WaDisableFenceDestinationToSLM:kbl (pre-prod) */ if (IS_KBL_REVID(dev_priv, KBL_REVID_A0, KBL_REVID_A0)) WA_SET_BIT_MASKED(HDC_CHICKEN0, HDC_FENCE_DEST_SLM_DISABLE); /* WaToEnableHwFixForPushConstHWBug:kbl */ if (IS_KBL_REVID(dev_priv, KBL_REVID_C0, REVID_FOREVER)) WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaDisableGafsUnitClkGating:kbl */ I915_WRITE(GEN7_UCGCTL4, (I915_READ(GEN7_UCGCTL4) | GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE)); /* WaDisableSbeCacheDispatchPortSharing:kbl */ WA_SET_BIT_MASKED( GEN7_HALF_SLICE_CHICKEN1, GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); /* WaInPlaceDecompressionHang:kbl */ I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA, (I915_READ(GEN9_GAMT_ECO_REG_RW_IA) | GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS)); /* WaDisableLSQCROPERFforOCL:kbl */ ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4); if (ret) return ret; return 0; } static int glk_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen9_init_workarounds(engine); if (ret) return ret; /* WaToEnableHwFixForPushConstHWBug:glk */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); return 0; } static int cfl_init_workarounds(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int ret; ret = gen9_init_workarounds(engine); if (ret) return ret; /* WaEnableGapsTsvCreditFix:cfl */ I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE)); /* WaToEnableHwFixForPushConstHWBug:cfl */ WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); /* WaDisableGafsUnitClkGating:cfl */ I915_WRITE(GEN7_UCGCTL4, (I915_READ(GEN7_UCGCTL4) | GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE)); /* WaDisableSbeCacheDispatchPortSharing:cfl */ WA_SET_BIT_MASKED( GEN7_HALF_SLICE_CHICKEN1, GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE); /* WaInPlaceDecompressionHang:cfl */ I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA, (I915_READ(GEN9_GAMT_ECO_REG_RW_IA) | GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS)); return 0; } int init_workarounds_ring(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; int err; WARN_ON(engine->id != RCS); dev_priv->workarounds.count = 0; dev_priv->workarounds.hw_whitelist_count[engine->id] = 0; if (IS_BROADWELL(dev_priv)) err = bdw_init_workarounds(engine); else if (IS_CHERRYVIEW(dev_priv)) err = chv_init_workarounds(engine); else if (IS_SKYLAKE(dev_priv)) err = skl_init_workarounds(engine); else if (IS_BROXTON(dev_priv)) err = bxt_init_workarounds(engine); else if (IS_KABYLAKE(dev_priv)) err = kbl_init_workarounds(engine); else if (IS_GEMINILAKE(dev_priv)) err = glk_init_workarounds(engine); else if (IS_COFFEELAKE(dev_priv)) err = cfl_init_workarounds(engine); else if (IS_CANNONLAKE(dev_priv)) err = cnl_init_workarounds(engine); else err = 0; if (err) return err; DRM_DEBUG_DRIVER("%s: Number of context specific w/a: %d\n", engine->name, dev_priv->workarounds.count); return 0; } int intel_ring_workarounds_emit(struct drm_i915_gem_request *req) { struct i915_workarounds *w = &req->i915->workarounds; u32 *cs; int ret, i; if (w->count == 0) return 0; ret = req->engine->emit_flush(req, EMIT_BARRIER); if (ret) return ret; cs = intel_ring_begin(req, (w->count * 2 + 2)); if (IS_ERR(cs)) return PTR_ERR(cs); *cs++ = MI_LOAD_REGISTER_IMM(w->count); for (i = 0; i < w->count; i++) { *cs++ = i915_mmio_reg_offset(w->reg[i].addr); *cs++ = w->reg[i].value; } *cs++ = MI_NOOP; intel_ring_advance(req, cs); ret = req->engine->emit_flush(req, EMIT_BARRIER); if (ret) return ret; return 0; } static bool ring_is_idle(struct intel_engine_cs *engine) { struct drm_i915_private *dev_priv = engine->i915; bool idle = true; intel_runtime_pm_get(dev_priv); /* First check that no commands are left in the ring */ if ((I915_READ_HEAD(engine) & HEAD_ADDR) != (I915_READ_TAIL(engine) & TAIL_ADDR)) idle = false; /* No bit for gen2, so assume the CS parser is idle */ if (INTEL_GEN(dev_priv) > 2 && !(I915_READ_MODE(engine) & MODE_IDLE)) idle = false; intel_runtime_pm_put(dev_priv); return idle; } /** * 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) { struct drm_i915_private *dev_priv = engine->i915; /* More white lies, if wedged, hw state is inconsistent */ if (i915_terminally_wedged(&dev_priv->gpu_error)) return true; /* Any inflight/incomplete requests? */ if (!i915_seqno_passed(intel_engine_get_seqno(engine), intel_engine_last_submit(engine))) return false; if (I915_SELFTEST_ONLY(engine->breadcrumbs.mock)) return true; /* Interrupt/tasklet pending? */ if (test_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted)) return false; /* Waiting to drain ELSP? */ if (READ_ONCE(engine->execlists.active)) return false; /* ELSP is empty, but there are ready requests? */ if (READ_ONCE(engine->execlists.first)) return false; /* Ring stopped? */ if (!ring_is_idle(engine)) return false; return true; } bool intel_engines_are_idle(struct drm_i915_private *dev_priv) { 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 (i915_terminally_wedged(&dev_priv->gpu_error)) return true; for_each_engine(engine, dev_priv, id) { if (!intel_engine_is_idle(engine)) return false; } return true; } /** * intel_engine_has_kernel_context: * @engine: the engine * * Returns true if the last context to be executed on this engine, or has been * executed if the engine is already idle, is the kernel context * (#i915.kernel_context). */ bool intel_engine_has_kernel_context(const struct intel_engine_cs *engine) { const struct i915_gem_context * const kernel_context = engine->i915->kernel_context; struct drm_i915_gem_request *rq; lockdep_assert_held(&engine->i915->drm.struct_mutex); /* * Check the last context seen by the engine. If active, it will be * the last request that remains in the timeline. When idle, it is * the last executed context as tracked by retirement. */ rq = __i915_gem_active_peek(&engine->timeline->last_request); if (rq) return rq->ctx == kernel_context; else return engine->last_retired_context == kernel_context; } void intel_engines_reset_default_submission(struct drm_i915_private *i915) { struct intel_engine_cs *engine; enum intel_engine_id id; for_each_engine(engine, i915, id) engine->set_default_submission(engine); } /** * intel_engines_park: called when the GT is transitioning from busy->idle * @i915: the i915 device * * The GT is now idle and about to go to sleep (maybe never to wake again?). * Time for us to tidy and put away our toys (release resources back to the * system). */ void intel_engines_park(struct drm_i915_private *i915) { struct intel_engine_cs *engine; enum intel_engine_id id; for_each_engine(engine, i915, id) { /* Flush the residual irq tasklets first. */ intel_engine_disarm_breadcrumbs(engine); tasklet_kill(&engine->execlists.tasklet); /* * We are committed now to parking the engines, make sure there * will be no more interrupts arriving later and the engines * are truly idle. */ if (wait_for(intel_engine_is_idle(engine), 10)) { struct drm_printer p = drm_debug_printer(__func__); dev_err(i915->drm.dev, "%s is not idle before parking\n", engine->name); intel_engine_dump(engine, &p, NULL); } if (engine->park) engine->park(engine); i915_gem_batch_pool_fini(&engine->batch_pool); engine->execlists.no_priolist = false; } } /** * intel_engines_unpark: called when the GT is transitioning from idle->busy * @i915: the i915 device * * The GT was idle and now about to fire up with some new user requests. */ void intel_engines_unpark(struct drm_i915_private *i915) { struct intel_engine_cs *engine; enum intel_engine_id id; for_each_engine(engine, i915, id) { if (engine->unpark) engine->unpark(engine); } } bool intel_engine_can_store_dword(struct intel_engine_cs *engine) { switch (INTEL_GEN(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 6: return engine->class != VIDEO_DECODE_CLASS; /* b0rked */ default: return true; } } unsigned int intel_engines_has_context_isolation(struct drm_i915_private *i915) { struct intel_engine_cs *engine; enum intel_engine_id id; unsigned int which; which = 0; for_each_engine(engine, i915, id) if (engine->default_state) which |= BIT(engine->uabi_class); return which; } static void print_request(struct drm_printer *m, struct drm_i915_gem_request *rq, const char *prefix) { drm_printf(m, "%s%x%s [%x:%x] prio=%d @ %dms: %s\n", prefix, rq->global_seqno, i915_gem_request_completed(rq) ? "!" : "", rq->ctx->hw_id, rq->fence.seqno, rq->priotree.priority, jiffies_to_msecs(jiffies - rq->emitted_jiffies), rq->timeline->common->name); } 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, "%08zx %s\n", pos, line); prev = buf + pos; skip = false; } } void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m, const char *header, ...) { struct intel_breadcrumbs * const b = &engine->breadcrumbs; const struct intel_engine_execlists * const execlists = &engine->execlists; struct i915_gpu_error * const error = &engine->i915->gpu_error; struct drm_i915_private *dev_priv = engine->i915; struct drm_i915_gem_request *rq; struct rb_node *rb; char hdr[80]; u64 addr; if (header) { va_list ap; va_start(ap, header); drm_vprintf(m, header, &ap); va_end(ap); } if (i915_terminally_wedged(&engine->i915->gpu_error)) drm_printf(m, "*** WEDGED ***\n"); drm_printf(m, "\tcurrent seqno %x, last %x, hangcheck %x [%d ms], inflight %d\n", intel_engine_get_seqno(engine), intel_engine_last_submit(engine), engine->hangcheck.seqno, jiffies_to_msecs(jiffies - engine->hangcheck.action_timestamp), engine->timeline->inflight_seqnos); drm_printf(m, "\tReset count: %d (global %d)\n", i915_reset_engine_count(error, engine), i915_reset_count(error)); rcu_read_lock(); drm_printf(m, "\tRequests:\n"); rq = list_first_entry(&engine->timeline->requests, struct drm_i915_gem_request, link); if (&rq->link != &engine->timeline->requests) print_request(m, rq, "\t\tfirst "); rq = list_last_entry(&engine->timeline->requests, struct drm_i915_gem_request, link); if (&rq->link != &engine->timeline->requests) print_request(m, rq, "\t\tlast "); rq = i915_gem_find_active_request(engine); if (rq) { print_request(m, rq, "\t\tactive "); drm_printf(m, "\t\t[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]\n", rq->head, rq->postfix, rq->tail, rq->batch ? upper_32_bits(rq->batch->node.start) : ~0u, rq->batch ? lower_32_bits(rq->batch->node.start) : ~0u); } drm_printf(m, "\tRING_START: 0x%08x [0x%08x]\n", I915_READ(RING_START(engine->mmio_base)), rq ? i915_ggtt_offset(rq->ring->vma) : 0); drm_printf(m, "\tRING_HEAD: 0x%08x [0x%08x]\n", I915_READ(RING_HEAD(engine->mmio_base)) & HEAD_ADDR, rq ? rq->ring->head : 0); drm_printf(m, "\tRING_TAIL: 0x%08x [0x%08x]\n", I915_READ(RING_TAIL(engine->mmio_base)) & TAIL_ADDR, rq ? rq->ring->tail : 0); drm_printf(m, "\tRING_CTL: 0x%08x%s\n", I915_READ(RING_CTL(engine->mmio_base)), I915_READ(RING_CTL(engine->mmio_base)) & (RING_WAIT | RING_WAIT_SEMAPHORE) ? " [waiting]" : ""); if (INTEL_GEN(engine->i915) > 2) { drm_printf(m, "\tRING_MODE: 0x%08x%s\n", I915_READ(RING_MI_MODE(engine->mmio_base)), I915_READ(RING_MI_MODE(engine->mmio_base)) & (MODE_IDLE) ? " [idle]" : ""); } if (HAS_LEGACY_SEMAPHORES(dev_priv)) { drm_printf(m, "\tSYNC_0: 0x%08x\n", I915_READ(RING_SYNC_0(engine->mmio_base))); drm_printf(m, "\tSYNC_1: 0x%08x\n", I915_READ(RING_SYNC_1(engine->mmio_base))); if (HAS_VEBOX(dev_priv)) drm_printf(m, "\tSYNC_2: 0x%08x\n", I915_READ(RING_SYNC_2(engine->mmio_base))); } rcu_read_unlock(); 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 (INTEL_GEN(dev_priv) >= 8) addr = I915_READ64_2x32(RING_DMA_FADD(engine->mmio_base), RING_DMA_FADD_UDW(engine->mmio_base)); else if (INTEL_GEN(dev_priv) >= 4) addr = I915_READ(RING_DMA_FADD(engine->mmio_base)); else addr = I915_READ(DMA_FADD_I8XX); drm_printf(m, "\tDMA_FADDR: 0x%08x_%08x\n", upper_32_bits(addr), lower_32_bits(addr)); if (INTEL_GEN(dev_priv) >= 4) { drm_printf(m, "\tIPEIR: 0x%08x\n", I915_READ(RING_IPEIR(engine->mmio_base))); drm_printf(m, "\tIPEHR: 0x%08x\n", I915_READ(RING_IPEHR(engine->mmio_base))); } else { drm_printf(m, "\tIPEIR: 0x%08x\n", I915_READ(IPEIR)); drm_printf(m, "\tIPEHR: 0x%08x\n", I915_READ(IPEHR)); } if (HAS_EXECLISTS(dev_priv)) { const u32 *hws = &engine->status_page.page_addr[I915_HWS_CSB_BUF0_INDEX]; u32 ptr, read, write; unsigned int idx; drm_printf(m, "\tExeclist status: 0x%08x %08x\n", I915_READ(RING_EXECLIST_STATUS_LO(engine)), I915_READ(RING_EXECLIST_STATUS_HI(engine))); ptr = I915_READ(RING_CONTEXT_STATUS_PTR(engine)); read = GEN8_CSB_READ_PTR(ptr); write = GEN8_CSB_WRITE_PTR(ptr); drm_printf(m, "\tExeclist CSB read %d [%d cached], write %d [%d from hws], interrupt posted? %s\n", read, execlists->csb_head, write, intel_read_status_page(engine, intel_hws_csb_write_index(engine->i915)), yesno(test_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted))); if (read >= GEN8_CSB_ENTRIES) read = 0; if (write >= GEN8_CSB_ENTRIES) write = 0; if (read > write) write += GEN8_CSB_ENTRIES; while (read < write) { idx = ++read % GEN8_CSB_ENTRIES; drm_printf(m, "\tExeclist CSB[%d]: 0x%08x [0x%08x in hwsp], context: %d [%d in hwsp]\n", idx, I915_READ(RING_CONTEXT_STATUS_BUF_LO(engine, idx)), hws[idx * 2], I915_READ(RING_CONTEXT_STATUS_BUF_HI(engine, idx)), hws[idx * 2 + 1]); } rcu_read_lock(); for (idx = 0; idx < execlists_num_ports(execlists); idx++) { unsigned int count; rq = port_unpack(&execlists->port[idx], &count); if (rq) { snprintf(hdr, sizeof(hdr), "\t\tELSP[%d] count=%d, rq: ", idx, count); print_request(m, rq, hdr); } else { drm_printf(m, "\t\tELSP[%d] idle\n", idx); } } drm_printf(m, "\t\tHW active? 0x%x\n", execlists->active); rcu_read_unlock(); } else if (INTEL_GEN(dev_priv) > 6) { drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n", I915_READ(RING_PP_DIR_BASE(engine))); drm_printf(m, "\tPP_DIR_BASE_READ: 0x%08x\n", I915_READ(RING_PP_DIR_BASE_READ(engine))); drm_printf(m, "\tPP_DIR_DCLV: 0x%08x\n", I915_READ(RING_PP_DIR_DCLV(engine))); } spin_lock_irq(&engine->timeline->lock); list_for_each_entry(rq, &engine->timeline->requests, link) print_request(m, rq, "\t\tE "); for (rb = execlists->first; rb; rb = rb_next(rb)) { struct i915_priolist *p = rb_entry(rb, typeof(*p), node); list_for_each_entry(rq, &p->requests, priotree.link) print_request(m, rq, "\t\tQ "); } spin_unlock_irq(&engine->timeline->lock); spin_lock_irq(&b->rb_lock); for (rb = rb_first(&b->waiters); rb; rb = rb_next(rb)) { struct intel_wait *w = rb_entry(rb, typeof(*w), node); drm_printf(m, "\t%s [%d] waiting for %x\n", w->tsk->comm, w->tsk->pid, w->seqno); } spin_unlock_irq(&b->rb_lock); if (INTEL_GEN(dev_priv) >= 6) { drm_printf(m, "\tRING_IMR: %08x\n", I915_READ_IMR(engine)); } drm_printf(m, "IRQ? 0x%lx (breadcrumbs? %s) (execlists? %s)\n", engine->irq_posted, yesno(test_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted)), yesno(test_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted))); drm_printf(m, "HWSP:\n"); hexdump(m, engine->status_page.page_addr, PAGE_SIZE); drm_printf(m, "Idle? %s\n", yesno(intel_engine_is_idle(engine))); } static u8 user_class_map[] = { [I915_ENGINE_CLASS_RENDER] = RENDER_CLASS, [I915_ENGINE_CLASS_COPY] = COPY_ENGINE_CLASS, [I915_ENGINE_CLASS_VIDEO] = VIDEO_DECODE_CLASS, [I915_ENGINE_CLASS_VIDEO_ENHANCE] = VIDEO_ENHANCEMENT_CLASS, }; struct intel_engine_cs * intel_engine_lookup_user(struct drm_i915_private *i915, u8 class, u8 instance) { if (class >= ARRAY_SIZE(user_class_map)) return NULL; class = user_class_map[class]; GEM_BUG_ON(class > MAX_ENGINE_CLASS); if (instance > MAX_ENGINE_INSTANCE) return NULL; return i915->engine_class[class][instance]; } /** * intel_enable_engine_stats() - Enable engine busy tracking on engine * @engine: engine to enable stats collection * * Start collecting the engine busyness data for @engine. * * Returns 0 on success or a negative error code. */ int intel_enable_engine_stats(struct intel_engine_cs *engine) { unsigned long flags; if (!intel_engine_supports_stats(engine)) return -ENODEV; spin_lock_irqsave(&engine->stats.lock, flags); if (engine->stats.enabled == ~0) goto busy; if (engine->stats.enabled++ == 0) engine->stats.enabled_at = ktime_get(); spin_unlock_irqrestore(&engine->stats.lock, flags); return 0; busy: spin_unlock_irqrestore(&engine->stats.lock, flags); return -EBUSY; } static ktime_t __intel_engine_get_busy_time(struct intel_engine_cs *engine) { ktime_t total = engine->stats.total; /* * If the engine is executing something at the moment * add it to the total. */ if (engine->stats.active) total = ktime_add(total, ktime_sub(ktime_get(), engine->stats.start)); return total; } /** * intel_engine_get_busy_time() - Return current accumulated engine busyness * @engine: engine to report on * * 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 total; unsigned long flags; spin_lock_irqsave(&engine->stats.lock, flags); total = __intel_engine_get_busy_time(engine); spin_unlock_irqrestore(&engine->stats.lock, flags); return total; } /** * intel_disable_engine_stats() - Disable engine busy tracking on engine * @engine: engine to disable stats collection * * Stops collecting the engine busyness data for @engine. */ void intel_disable_engine_stats(struct intel_engine_cs *engine) { unsigned long flags; if (!intel_engine_supports_stats(engine)) return; spin_lock_irqsave(&engine->stats.lock, flags); WARN_ON_ONCE(engine->stats.enabled == 0); if (--engine->stats.enabled == 0) { engine->stats.total = __intel_engine_get_busy_time(engine); engine->stats.active = 0; } spin_unlock_irqrestore(&engine->stats.lock, flags); } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/mock_engine.c" #endif