diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_gt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c new file mode 100644 index 000000000000..d48ec9a76ed1 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2019 Intel Corporation + */ + +#include "i915_drv.h" +#include "intel_gt.h" +#include "intel_gt_pm.h" +#include "intel_uncore.h" + +void intel_gt_init_early(struct intel_gt *gt, struct drm_i915_private *i915) +{ + gt->i915 = i915; + gt->uncore = &i915->uncore; + + spin_lock_init(>->irq_lock); + + INIT_LIST_HEAD(>->closed_vma); + spin_lock_init(>->closed_lock); + + intel_gt_init_hangcheck(gt); + intel_gt_init_reset(gt); + intel_gt_pm_init_early(gt); + intel_uc_init_early(>->uc); +} + +void intel_gt_init_hw(struct drm_i915_private *i915) +{ + i915->gt.ggtt = &i915->ggtt; +} + +static void rmw_set(struct intel_uncore *uncore, i915_reg_t reg, u32 set) +{ + intel_uncore_rmw(uncore, reg, 0, set); +} + +static void rmw_clear(struct intel_uncore *uncore, i915_reg_t reg, u32 clr) +{ + intel_uncore_rmw(uncore, reg, clr, 0); +} + +static void clear_register(struct intel_uncore *uncore, i915_reg_t reg) +{ + intel_uncore_rmw(uncore, reg, 0, 0); +} + +static void gen8_clear_engine_error_register(struct intel_engine_cs *engine) +{ + GEN6_RING_FAULT_REG_RMW(engine, RING_FAULT_VALID, 0); + GEN6_RING_FAULT_REG_POSTING_READ(engine); +} + +void +intel_gt_clear_error_registers(struct intel_gt *gt, + intel_engine_mask_t engine_mask) +{ + struct drm_i915_private *i915 = gt->i915; + struct intel_uncore *uncore = gt->uncore; + u32 eir; + + if (!IS_GEN(i915, 2)) + clear_register(uncore, PGTBL_ER); + + if (INTEL_GEN(i915) < 4) + clear_register(uncore, IPEIR(RENDER_RING_BASE)); + else + clear_register(uncore, IPEIR_I965); + + clear_register(uncore, EIR); + eir = intel_uncore_read(uncore, EIR); + if (eir) { + /* + * some errors might have become stuck, + * mask them. + */ + DRM_DEBUG_DRIVER("EIR stuck: 0x%08x, masking\n", eir); + rmw_set(uncore, EMR, eir); + intel_uncore_write(uncore, GEN2_IIR, + I915_MASTER_ERROR_INTERRUPT); + } + + if (INTEL_GEN(i915) >= 12) { + rmw_clear(uncore, GEN12_RING_FAULT_REG, RING_FAULT_VALID); + intel_uncore_posting_read(uncore, GEN12_RING_FAULT_REG); + } else if (INTEL_GEN(i915) >= 8) { + rmw_clear(uncore, GEN8_RING_FAULT_REG, RING_FAULT_VALID); + intel_uncore_posting_read(uncore, GEN8_RING_FAULT_REG); + } else if (INTEL_GEN(i915) >= 6) { + struct intel_engine_cs *engine; + enum intel_engine_id id; + + for_each_engine_masked(engine, i915, engine_mask, id) + gen8_clear_engine_error_register(engine); + } +} + +static void gen6_check_faults(struct intel_gt *gt) +{ + struct intel_engine_cs *engine; + enum intel_engine_id id; + u32 fault; + + for_each_engine(engine, gt->i915, id) { + fault = GEN6_RING_FAULT_REG_READ(engine); + if (fault & RING_FAULT_VALID) { + DRM_DEBUG_DRIVER("Unexpected fault\n" + "\tAddr: 0x%08lx\n" + "\tAddress space: %s\n" + "\tSource ID: %d\n" + "\tType: %d\n", + fault & PAGE_MASK, + fault & RING_FAULT_GTTSEL_MASK ? + "GGTT" : "PPGTT", + RING_FAULT_SRCID(fault), + RING_FAULT_FAULT_TYPE(fault)); + } + } +} + +static void gen8_check_faults(struct intel_gt *gt) +{ + struct intel_uncore *uncore = gt->uncore; + i915_reg_t fault_reg, fault_data0_reg, fault_data1_reg; + u32 fault; + + if (INTEL_GEN(gt->i915) >= 12) { + fault_reg = GEN12_RING_FAULT_REG; + fault_data0_reg = GEN12_FAULT_TLB_DATA0; + fault_data1_reg = GEN12_FAULT_TLB_DATA1; + } else { + fault_reg = GEN8_RING_FAULT_REG; + fault_data0_reg = GEN8_FAULT_TLB_DATA0; + fault_data1_reg = GEN8_FAULT_TLB_DATA1; + } + + fault = intel_uncore_read(uncore, fault_reg); + if (fault & RING_FAULT_VALID) { + u32 fault_data0, fault_data1; + u64 fault_addr; + + fault_data0 = intel_uncore_read(uncore, fault_data0_reg); + fault_data1 = intel_uncore_read(uncore, fault_data1_reg); + + fault_addr = ((u64)(fault_data1 & FAULT_VA_HIGH_BITS) << 44) | + ((u64)fault_data0 << 12); + + DRM_DEBUG_DRIVER("Unexpected fault\n" + "\tAddr: 0x%08x_%08x\n" + "\tAddress space: %s\n" + "\tEngine ID: %d\n" + "\tSource ID: %d\n" + "\tType: %d\n", + upper_32_bits(fault_addr), + lower_32_bits(fault_addr), + fault_data1 & FAULT_GTT_SEL ? "GGTT" : "PPGTT", + GEN8_RING_FAULT_ENGINE_ID(fault), + RING_FAULT_SRCID(fault), + RING_FAULT_FAULT_TYPE(fault)); + } +} + +void intel_gt_check_and_clear_faults(struct intel_gt *gt) +{ + struct drm_i915_private *i915 = gt->i915; + + /* From GEN8 onwards we only have one 'All Engine Fault Register' */ + if (INTEL_GEN(i915) >= 8) + gen8_check_faults(gt); + else if (INTEL_GEN(i915) >= 6) + gen6_check_faults(gt); + else + return; + + intel_gt_clear_error_registers(gt, ALL_ENGINES); +} + +void intel_gt_flush_ggtt_writes(struct intel_gt *gt) +{ + struct drm_i915_private *i915 = gt->i915; + intel_wakeref_t wakeref; + + /* + * No actual flushing is required for the GTT write domain for reads + * from the GTT domain. Writes to it "immediately" go to main memory + * as far as we know, so there's no chipset flush. It also doesn't + * land in the GPU render cache. + * + * However, we do have to enforce the order so that all writes through + * the GTT land before any writes to the device, such as updates to + * the GATT itself. + * + * We also have to wait a bit for the writes to land from the GTT. + * An uncached read (i.e. mmio) seems to be ideal for the round-trip + * timing. This issue has only been observed when switching quickly + * between GTT writes and CPU reads from inside the kernel on recent hw, + * and it appears to only affect discrete GTT blocks (i.e. on LLC + * system agents we cannot reproduce this behaviour, until Cannonlake + * that was!). + */ + + wmb(); + + if (INTEL_INFO(i915)->has_coherent_ggtt) + return; + + intel_gt_chipset_flush(gt); + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + struct intel_uncore *uncore = gt->uncore; + + spin_lock_irq(&uncore->lock); + intel_uncore_posting_read_fw(uncore, + RING_HEAD(RENDER_RING_BASE)); + spin_unlock_irq(&uncore->lock); + } +} + +void intel_gt_chipset_flush(struct intel_gt *gt) +{ + wmb(); + if (INTEL_GEN(gt->i915) < 6) + intel_gtt_chipset_flush(); +} + +int intel_gt_init_scratch(struct intel_gt *gt, unsigned int size) +{ + struct drm_i915_private *i915 = gt->i915; + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int ret; + + obj = i915_gem_object_create_stolen(i915, size); + if (!obj) + obj = i915_gem_object_create_internal(i915, size); + if (IS_ERR(obj)) { + DRM_ERROR("Failed to allocate scratch page\n"); + return PTR_ERR(obj); + } + + vma = i915_vma_instance(obj, >->ggtt->vm, NULL); + if (IS_ERR(vma)) { + ret = PTR_ERR(vma); + goto err_unref; + } + + ret = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH); + if (ret) + goto err_unref; + + gt->scratch = i915_vma_make_unshrinkable(vma); + + return 0; + +err_unref: + i915_gem_object_put(obj); + return ret; +} + +void intel_gt_fini_scratch(struct intel_gt *gt) +{ + i915_vma_unpin_and_release(>->scratch, 0); +} + +void intel_gt_driver_late_release(struct intel_gt *gt) +{ + intel_uc_driver_late_release(>->uc); + intel_gt_fini_reset(gt); +} |