/* * Copyright © 2014 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. * * Authors: * Ben Widawsky * Michel Thierry * Thomas Daniel * Oscar Mateo * */ /* * GEN8 brings an expansion of the HW contexts: "Logical Ring Contexts". * These expanded contexts enable a number of new abilities, especially * "Execlists" (also implemented in this file). * * Execlists are the new method by which, on gen8+ hardware, workloads are * submitted for execution (as opposed to the legacy, ringbuffer-based, method). */ #include #include #include "i915_drv.h" #define GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE) #define GEN8_LR_CONTEXT_OTHER_SIZE (2 * PAGE_SIZE) #define GEN8_LR_CONTEXT_ALIGN 4096 #define RING_ELSP(ring) ((ring)->mmio_base+0x230) #define RING_EXECLIST_STATUS(ring) ((ring)->mmio_base+0x234) #define RING_CONTEXT_CONTROL(ring) ((ring)->mmio_base+0x244) #define RING_CONTEXT_STATUS_BUF(ring) ((ring)->mmio_base+0x370) #define RING_CONTEXT_STATUS_PTR(ring) ((ring)->mmio_base+0x3a0) #define RING_EXECLIST_QFULL (1 << 0x2) #define RING_EXECLIST1_VALID (1 << 0x3) #define RING_EXECLIST0_VALID (1 << 0x4) #define RING_EXECLIST_ACTIVE_STATUS (3 << 0xE) #define RING_EXECLIST1_ACTIVE (1 << 0x11) #define RING_EXECLIST0_ACTIVE (1 << 0x12) #define GEN8_CTX_STATUS_IDLE_ACTIVE (1 << 0) #define GEN8_CTX_STATUS_PREEMPTED (1 << 1) #define GEN8_CTX_STATUS_ELEMENT_SWITCH (1 << 2) #define GEN8_CTX_STATUS_ACTIVE_IDLE (1 << 3) #define GEN8_CTX_STATUS_COMPLETE (1 << 4) #define GEN8_CTX_STATUS_LITE_RESTORE (1 << 15) #define CTX_LRI_HEADER_0 0x01 #define CTX_CONTEXT_CONTROL 0x02 #define CTX_RING_HEAD 0x04 #define CTX_RING_TAIL 0x06 #define CTX_RING_BUFFER_START 0x08 #define CTX_RING_BUFFER_CONTROL 0x0a #define CTX_BB_HEAD_U 0x0c #define CTX_BB_HEAD_L 0x0e #define CTX_BB_STATE 0x10 #define CTX_SECOND_BB_HEAD_U 0x12 #define CTX_SECOND_BB_HEAD_L 0x14 #define CTX_SECOND_BB_STATE 0x16 #define CTX_BB_PER_CTX_PTR 0x18 #define CTX_RCS_INDIRECT_CTX 0x1a #define CTX_RCS_INDIRECT_CTX_OFFSET 0x1c #define CTX_LRI_HEADER_1 0x21 #define CTX_CTX_TIMESTAMP 0x22 #define CTX_PDP3_UDW 0x24 #define CTX_PDP3_LDW 0x26 #define CTX_PDP2_UDW 0x28 #define CTX_PDP2_LDW 0x2a #define CTX_PDP1_UDW 0x2c #define CTX_PDP1_LDW 0x2e #define CTX_PDP0_UDW 0x30 #define CTX_PDP0_LDW 0x32 #define CTX_LRI_HEADER_2 0x41 #define CTX_R_PWR_CLK_STATE 0x42 #define CTX_GPGPU_CSR_BASE_ADDRESS 0x44 #define GEN8_CTX_VALID (1<<0) #define GEN8_CTX_FORCE_PD_RESTORE (1<<1) #define GEN8_CTX_FORCE_RESTORE (1<<2) #define GEN8_CTX_L3LLC_COHERENT (1<<5) #define GEN8_CTX_PRIVILEGE (1<<8) enum { ADVANCED_CONTEXT = 0, LEGACY_CONTEXT, ADVANCED_AD_CONTEXT, LEGACY_64B_CONTEXT }; #define GEN8_CTX_MODE_SHIFT 3 enum { FAULT_AND_HANG = 0, FAULT_AND_HALT, /* Debug only */ FAULT_AND_STREAM, FAULT_AND_CONTINUE /* Unsupported */ }; #define GEN8_CTX_ID_SHIFT 32 int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists) { WARN_ON(i915.enable_ppgtt == -1); if (enable_execlists == 0) return 0; if (HAS_LOGICAL_RING_CONTEXTS(dev) && USES_PPGTT(dev) && i915.use_mmio_flip >= 0) return 1; return 0; } u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj) { u32 lrca = i915_gem_obj_ggtt_offset(ctx_obj); /* LRCA is required to be 4K aligned so the more significant 20 bits * are globally unique */ return lrca >> 12; } static uint64_t execlists_ctx_descriptor(struct drm_i915_gem_object *ctx_obj) { uint64_t desc; uint64_t lrca = i915_gem_obj_ggtt_offset(ctx_obj); WARN_ON(lrca & 0xFFFFFFFF00000FFFULL); desc = GEN8_CTX_VALID; desc |= LEGACY_CONTEXT << GEN8_CTX_MODE_SHIFT; desc |= GEN8_CTX_L3LLC_COHERENT; desc |= GEN8_CTX_PRIVILEGE; desc |= lrca; desc |= (u64)intel_execlists_ctx_id(ctx_obj) << GEN8_CTX_ID_SHIFT; /* TODO: WaDisableLiteRestore when we start using semaphore * signalling between Command Streamers */ /* desc |= GEN8_CTX_FORCE_RESTORE; */ return desc; } static void execlists_elsp_write(struct intel_engine_cs *ring, struct drm_i915_gem_object *ctx_obj0, struct drm_i915_gem_object *ctx_obj1) { struct drm_i915_private *dev_priv = ring->dev->dev_private; uint64_t temp = 0; uint32_t desc[4]; unsigned long flags; /* XXX: You must always write both descriptors in the order below. */ if (ctx_obj1) temp = execlists_ctx_descriptor(ctx_obj1); else temp = 0; desc[1] = (u32)(temp >> 32); desc[0] = (u32)temp; temp = execlists_ctx_descriptor(ctx_obj0); desc[3] = (u32)(temp >> 32); desc[2] = (u32)temp; /* Set Force Wakeup bit to prevent GT from entering C6 while ELSP writes * are in progress. * * The other problem is that we can't just call gen6_gt_force_wake_get() * because that function calls intel_runtime_pm_get(), which might sleep. * Instead, we do the runtime_pm_get/put when creating/destroying requests. */ spin_lock_irqsave(&dev_priv->uncore.lock, flags); if (dev_priv->uncore.forcewake_count++ == 0) dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL); spin_unlock_irqrestore(&dev_priv->uncore.lock, flags); I915_WRITE(RING_ELSP(ring), desc[1]); I915_WRITE(RING_ELSP(ring), desc[0]); I915_WRITE(RING_ELSP(ring), desc[3]); /* The context is automatically loaded after the following */ I915_WRITE(RING_ELSP(ring), desc[2]); /* ELSP is a wo register, so use another nearby reg for posting instead */ POSTING_READ(RING_EXECLIST_STATUS(ring)); /* Release Force Wakeup (see the big comment above). */ spin_lock_irqsave(&dev_priv->uncore.lock, flags); if (--dev_priv->uncore.forcewake_count == 0) dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL); spin_unlock_irqrestore(&dev_priv->uncore.lock, flags); } static int execlists_ctx_write_tail(struct drm_i915_gem_object *ctx_obj, u32 tail) { struct page *page; uint32_t *reg_state; page = i915_gem_object_get_page(ctx_obj, 1); reg_state = kmap_atomic(page); reg_state[CTX_RING_TAIL+1] = tail; kunmap_atomic(reg_state); return 0; } static int execlists_submit_context(struct intel_engine_cs *ring, struct intel_context *to0, u32 tail0, struct intel_context *to1, u32 tail1) { struct drm_i915_gem_object *ctx_obj0; struct drm_i915_gem_object *ctx_obj1 = NULL; ctx_obj0 = to0->engine[ring->id].state; BUG_ON(!ctx_obj0); WARN_ON(!i915_gem_obj_is_pinned(ctx_obj0)); execlists_ctx_write_tail(ctx_obj0, tail0); if (to1) { ctx_obj1 = to1->engine[ring->id].state; BUG_ON(!ctx_obj1); WARN_ON(!i915_gem_obj_is_pinned(ctx_obj1)); execlists_ctx_write_tail(ctx_obj1, tail1); } execlists_elsp_write(ring, ctx_obj0, ctx_obj1); return 0; } static void execlists_context_unqueue(struct intel_engine_cs *ring) { struct intel_ctx_submit_request *req0 = NULL, *req1 = NULL; struct intel_ctx_submit_request *cursor = NULL, *tmp = NULL; struct drm_i915_private *dev_priv = ring->dev->dev_private; assert_spin_locked(&ring->execlist_lock); if (list_empty(&ring->execlist_queue)) return; /* Try to read in pairs */ list_for_each_entry_safe(cursor, tmp, &ring->execlist_queue, execlist_link) { if (!req0) { req0 = cursor; } else if (req0->ctx == cursor->ctx) { /* Same ctx: ignore first request, as second request * will update tail past first request's workload */ list_del(&req0->execlist_link); queue_work(dev_priv->wq, &req0->work); req0 = cursor; } else { req1 = cursor; break; } } WARN_ON(execlists_submit_context(ring, req0->ctx, req0->tail, req1 ? req1->ctx : NULL, req1 ? req1->tail : 0)); } static bool execlists_check_remove_request(struct intel_engine_cs *ring, u32 request_id) { struct drm_i915_private *dev_priv = ring->dev->dev_private; struct intel_ctx_submit_request *head_req; assert_spin_locked(&ring->execlist_lock); head_req = list_first_entry_or_null(&ring->execlist_queue, struct intel_ctx_submit_request, execlist_link); if (head_req != NULL) { struct drm_i915_gem_object *ctx_obj = head_req->ctx->engine[ring->id].state; if (intel_execlists_ctx_id(ctx_obj) == request_id) { list_del(&head_req->execlist_link); queue_work(dev_priv->wq, &head_req->work); return true; } } return false; } void intel_execlists_handle_ctx_events(struct intel_engine_cs *ring) { struct drm_i915_private *dev_priv = ring->dev->dev_private; u32 status_pointer; u8 read_pointer; u8 write_pointer; u32 status; u32 status_id; u32 submit_contexts = 0; status_pointer = I915_READ(RING_CONTEXT_STATUS_PTR(ring)); read_pointer = ring->next_context_status_buffer; write_pointer = status_pointer & 0x07; if (read_pointer > write_pointer) write_pointer += 6; spin_lock(&ring->execlist_lock); while (read_pointer < write_pointer) { read_pointer++; status = I915_READ(RING_CONTEXT_STATUS_BUF(ring) + (read_pointer % 6) * 8); status_id = I915_READ(RING_CONTEXT_STATUS_BUF(ring) + (read_pointer % 6) * 8 + 4); if (status & GEN8_CTX_STATUS_COMPLETE) { if (execlists_check_remove_request(ring, status_id)) submit_contexts++; } } if (submit_contexts != 0) execlists_context_unqueue(ring); spin_unlock(&ring->execlist_lock); WARN(submit_contexts > 2, "More than two context complete events?\n"); ring->next_context_status_buffer = write_pointer % 6; I915_WRITE(RING_CONTEXT_STATUS_PTR(ring), ((u32)ring->next_context_status_buffer & 0x07) << 8); } static void execlists_free_request_task(struct work_struct *work) { struct intel_ctx_submit_request *req = container_of(work, struct intel_ctx_submit_request, work); struct drm_device *dev = req->ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; intel_runtime_pm_put(dev_priv); mutex_lock(&dev->struct_mutex); i915_gem_context_unreference(req->ctx); mutex_unlock(&dev->struct_mutex); kfree(req); } static int execlists_context_queue(struct intel_engine_cs *ring, struct intel_context *to, u32 tail) { struct intel_ctx_submit_request *req = NULL; struct drm_i915_private *dev_priv = ring->dev->dev_private; unsigned long flags; bool was_empty; req = kzalloc(sizeof(*req), GFP_KERNEL); if (req == NULL) return -ENOMEM; req->ctx = to; i915_gem_context_reference(req->ctx); req->ring = ring; req->tail = tail; INIT_WORK(&req->work, execlists_free_request_task); intel_runtime_pm_get(dev_priv); spin_lock_irqsave(&ring->execlist_lock, flags); was_empty = list_empty(&ring->execlist_queue); list_add_tail(&req->execlist_link, &ring->execlist_queue); if (was_empty) execlists_context_unqueue(ring); spin_unlock_irqrestore(&ring->execlist_lock, flags); return 0; } static int logical_ring_invalidate_all_caches(struct intel_ringbuffer *ringbuf) { struct intel_engine_cs *ring = ringbuf->ring; uint32_t flush_domains; int ret; flush_domains = 0; if (ring->gpu_caches_dirty) flush_domains = I915_GEM_GPU_DOMAINS; ret = ring->emit_flush(ringbuf, I915_GEM_GPU_DOMAINS, flush_domains); if (ret) return ret; ring->gpu_caches_dirty = false; return 0; } static int execlists_move_to_gpu(struct intel_ringbuffer *ringbuf, struct list_head *vmas) { struct intel_engine_cs *ring = ringbuf->ring; struct i915_vma *vma; uint32_t flush_domains = 0; bool flush_chipset = false; int ret; list_for_each_entry(vma, vmas, exec_list) { struct drm_i915_gem_object *obj = vma->obj; ret = i915_gem_object_sync(obj, ring); if (ret) return ret; if (obj->base.write_domain & I915_GEM_DOMAIN_CPU) flush_chipset |= i915_gem_clflush_object(obj, false); flush_domains |= obj->base.write_domain; } if (flush_domains & I915_GEM_DOMAIN_GTT) wmb(); /* Unconditionally invalidate gpu caches and ensure that we do flush * any residual writes from the previous batch. */ return logical_ring_invalidate_all_caches(ringbuf); } int intel_execlists_submission(struct drm_device *dev, struct drm_file *file, struct intel_engine_cs *ring, struct intel_context *ctx, struct drm_i915_gem_execbuffer2 *args, struct list_head *vmas, struct drm_i915_gem_object *batch_obj, u64 exec_start, u32 flags) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_ringbuffer *ringbuf = ctx->engine[ring->id].ringbuf; int instp_mode; u32 instp_mask; int ret; instp_mode = args->flags & I915_EXEC_CONSTANTS_MASK; instp_mask = I915_EXEC_CONSTANTS_MASK; switch (instp_mode) { case I915_EXEC_CONSTANTS_REL_GENERAL: case I915_EXEC_CONSTANTS_ABSOLUTE: case I915_EXEC_CONSTANTS_REL_SURFACE: if (instp_mode != 0 && ring != &dev_priv->ring[RCS]) { DRM_DEBUG("non-0 rel constants mode on non-RCS\n"); return -EINVAL; } if (instp_mode != dev_priv->relative_constants_mode) { if (instp_mode == I915_EXEC_CONSTANTS_REL_SURFACE) { DRM_DEBUG("rel surface constants mode invalid on gen5+\n"); return -EINVAL; } /* The HW changed the meaning on this bit on gen6 */ instp_mask &= ~I915_EXEC_CONSTANTS_REL_SURFACE; } break; default: DRM_DEBUG("execbuf with unknown constants: %d\n", instp_mode); return -EINVAL; } if (args->num_cliprects != 0) { DRM_DEBUG("clip rectangles are only valid on pre-gen5\n"); return -EINVAL; } else { if (args->DR4 == 0xffffffff) { DRM_DEBUG("UXA submitting garbage DR4, fixing up\n"); args->DR4 = 0; } if (args->DR1 || args->DR4 || args->cliprects_ptr) { DRM_DEBUG("0 cliprects but dirt in cliprects fields\n"); return -EINVAL; } } if (args->flags & I915_EXEC_GEN7_SOL_RESET) { DRM_DEBUG("sol reset is gen7 only\n"); return -EINVAL; } ret = execlists_move_to_gpu(ringbuf, vmas); if (ret) return ret; if (ring == &dev_priv->ring[RCS] && instp_mode != dev_priv->relative_constants_mode) { ret = intel_logical_ring_begin(ringbuf, 4); if (ret) return ret; intel_logical_ring_emit(ringbuf, MI_NOOP); intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(1)); intel_logical_ring_emit(ringbuf, INSTPM); intel_logical_ring_emit(ringbuf, instp_mask << 16 | instp_mode); intel_logical_ring_advance(ringbuf); dev_priv->relative_constants_mode = instp_mode; } ret = ring->emit_bb_start(ringbuf, exec_start, flags); if (ret) return ret; i915_gem_execbuffer_move_to_active(vmas, ring); i915_gem_execbuffer_retire_commands(dev, file, ring, batch_obj); return 0; } void intel_logical_ring_stop(struct intel_engine_cs *ring) { struct drm_i915_private *dev_priv = ring->dev->dev_private; int ret; if (!intel_ring_initialized(ring)) return; ret = intel_ring_idle(ring); if (ret && !i915_reset_in_progress(&to_i915(ring->dev)->gpu_error)) DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n", ring->name, ret); /* TODO: Is this correct with Execlists enabled? */ I915_WRITE_MODE(ring, _MASKED_BIT_ENABLE(STOP_RING)); if (wait_for_atomic((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000)) { DRM_ERROR("%s :timed out trying to stop ring\n", ring->name); return; } I915_WRITE_MODE(ring, _MASKED_BIT_DISABLE(STOP_RING)); } int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf) { struct intel_engine_cs *ring = ringbuf->ring; int ret; if (!ring->gpu_caches_dirty) return 0; ret = ring->emit_flush(ringbuf, 0, I915_GEM_GPU_DOMAINS); if (ret) return ret; ring->gpu_caches_dirty = false; return 0; } void intel_logical_ring_advance_and_submit(struct intel_ringbuffer *ringbuf) { struct intel_engine_cs *ring = ringbuf->ring; struct intel_context *ctx = ringbuf->FIXME_lrc_ctx; intel_logical_ring_advance(ringbuf); if (intel_ring_stopped(ring)) return; execlists_context_queue(ring, ctx, ringbuf->tail); } static int logical_ring_alloc_seqno(struct intel_engine_cs *ring, struct intel_context *ctx) { if (ring->outstanding_lazy_seqno) return 0; if (ring->preallocated_lazy_request == NULL) { struct drm_i915_gem_request *request; request = kmalloc(sizeof(*request), GFP_KERNEL); if (request == NULL) return -ENOMEM; /* Hold a reference to the context this request belongs to * (we will need it when the time comes to emit/retire the * request). */ request->ctx = ctx; i915_gem_context_reference(request->ctx); ring->preallocated_lazy_request = request; } return i915_gem_get_seqno(ring->dev, &ring->outstanding_lazy_seqno); } static int logical_ring_wait_request(struct intel_ringbuffer *ringbuf, int bytes) { struct intel_engine_cs *ring = ringbuf->ring; struct drm_i915_gem_request *request; u32 seqno = 0; int ret; if (ringbuf->last_retired_head != -1) { ringbuf->head = ringbuf->last_retired_head; ringbuf->last_retired_head = -1; ringbuf->space = intel_ring_space(ringbuf); if (ringbuf->space >= bytes) return 0; } list_for_each_entry(request, &ring->request_list, list) { if (__intel_ring_space(request->tail, ringbuf->tail, ringbuf->size) >= bytes) { seqno = request->seqno; break; } } if (seqno == 0) return -ENOSPC; ret = i915_wait_seqno(ring, seqno); if (ret) return ret; i915_gem_retire_requests_ring(ring); ringbuf->head = ringbuf->last_retired_head; ringbuf->last_retired_head = -1; ringbuf->space = intel_ring_space(ringbuf); return 0; } static int logical_ring_wait_for_space(struct intel_ringbuffer *ringbuf, int bytes) { struct intel_engine_cs *ring = ringbuf->ring; struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; unsigned long end; int ret; ret = logical_ring_wait_request(ringbuf, bytes); if (ret != -ENOSPC) return ret; /* Force the context submission in case we have been skipping it */ intel_logical_ring_advance_and_submit(ringbuf); /* With GEM the hangcheck timer should kick us out of the loop, * leaving it early runs the risk of corrupting GEM state (due * to running on almost untested codepaths). But on resume * timers don't work yet, so prevent a complete hang in that * case by choosing an insanely large timeout. */ end = jiffies + 60 * HZ; do { ringbuf->head = I915_READ_HEAD(ring); ringbuf->space = intel_ring_space(ringbuf); if (ringbuf->space >= bytes) { ret = 0; break; } msleep(1); if (dev_priv->mm.interruptible && signal_pending(current)) { ret = -ERESTARTSYS; break; } ret = i915_gem_check_wedge(&dev_priv->gpu_error, dev_priv->mm.interruptible); if (ret) break; if (time_after(jiffies, end)) { ret = -EBUSY; break; } } while (1); return ret; } static int logical_ring_wrap_buffer(struct intel_ringbuffer *ringbuf) { uint32_t __iomem *virt; int rem = ringbuf->size - ringbuf->tail; if (ringbuf->space < rem) { int ret = logical_ring_wait_for_space(ringbuf, rem); if (ret) return ret; } virt = ringbuf->virtual_start + ringbuf->tail; rem /= 4; while (rem--) iowrite32(MI_NOOP, virt++); ringbuf->tail = 0; ringbuf->space = intel_ring_space(ringbuf); return 0; } static int logical_ring_prepare(struct intel_ringbuffer *ringbuf, int bytes) { int ret; if (unlikely(ringbuf->tail + bytes > ringbuf->effective_size)) { ret = logical_ring_wrap_buffer(ringbuf); if (unlikely(ret)) return ret; } if (unlikely(ringbuf->space < bytes)) { ret = logical_ring_wait_for_space(ringbuf, bytes); if (unlikely(ret)) return ret; } return 0; } int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf, int num_dwords) { struct intel_engine_cs *ring = ringbuf->ring; struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = i915_gem_check_wedge(&dev_priv->gpu_error, dev_priv->mm.interruptible); if (ret) return ret; ret = logical_ring_prepare(ringbuf, num_dwords * sizeof(uint32_t)); if (ret) return ret; /* Preallocate the olr before touching the ring */ ret = logical_ring_alloc_seqno(ring, ringbuf->FIXME_lrc_ctx); if (ret) return ret; ringbuf->space -= num_dwords * sizeof(uint32_t); return 0; } static int gen8_init_common_ring(struct intel_engine_cs *ring) { struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE_IMR(ring, ~(ring->irq_enable_mask | ring->irq_keep_mask)); I915_WRITE(RING_HWSTAM(ring->mmio_base), 0xffffffff); I915_WRITE(RING_MODE_GEN7(ring), _MASKED_BIT_DISABLE(GFX_REPLAY_MODE) | _MASKED_BIT_ENABLE(GFX_RUN_LIST_ENABLE)); POSTING_READ(RING_MODE_GEN7(ring)); DRM_DEBUG_DRIVER("Execlists enabled for %s\n", ring->name); memset(&ring->hangcheck, 0, sizeof(ring->hangcheck)); return 0; } static int gen8_init_render_ring(struct intel_engine_cs *ring) { struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = gen8_init_common_ring(ring); if (ret) return ret; /* We need to disable the AsyncFlip performance optimisations in order * to use MI_WAIT_FOR_EVENT within the CS. It should already be * programmed to '1' on all products. * * WaDisableAsyncFlipPerfMode:snb,ivb,hsw,vlv,bdw,chv */ I915_WRITE(MI_MODE, _MASKED_BIT_ENABLE(ASYNC_FLIP_PERF_DISABLE)); ret = intel_init_pipe_control(ring); if (ret) return ret; I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING)); return ret; } static int gen8_emit_bb_start(struct intel_ringbuffer *ringbuf, u64 offset, unsigned flags) { bool ppgtt = !(flags & I915_DISPATCH_SECURE); int ret; ret = intel_logical_ring_begin(ringbuf, 4); if (ret) return ret; /* FIXME(BDW): Address space and security selectors. */ intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8)); intel_logical_ring_emit(ringbuf, lower_32_bits(offset)); intel_logical_ring_emit(ringbuf, upper_32_bits(offset)); intel_logical_ring_emit(ringbuf, MI_NOOP); intel_logical_ring_advance(ringbuf); return 0; } static bool gen8_logical_ring_get_irq(struct intel_engine_cs *ring) { struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; unsigned long flags; if (!dev->irq_enabled) return false; spin_lock_irqsave(&dev_priv->irq_lock, flags); if (ring->irq_refcount++ == 0) { I915_WRITE_IMR(ring, ~(ring->irq_enable_mask | ring->irq_keep_mask)); POSTING_READ(RING_IMR(ring->mmio_base)); } spin_unlock_irqrestore(&dev_priv->irq_lock, flags); return true; } static void gen8_logical_ring_put_irq(struct intel_engine_cs *ring) { struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; unsigned long flags; spin_lock_irqsave(&dev_priv->irq_lock, flags); if (--ring->irq_refcount == 0) { I915_WRITE_IMR(ring, ~ring->irq_keep_mask); POSTING_READ(RING_IMR(ring->mmio_base)); } spin_unlock_irqrestore(&dev_priv->irq_lock, flags); } static int gen8_emit_flush(struct intel_ringbuffer *ringbuf, u32 invalidate_domains, u32 unused) { struct intel_engine_cs *ring = ringbuf->ring; struct drm_device *dev = ring->dev; struct drm_i915_private *dev_priv = dev->dev_private; uint32_t cmd; int ret; ret = intel_logical_ring_begin(ringbuf, 4); if (ret) return ret; cmd = MI_FLUSH_DW + 1; if (ring == &dev_priv->ring[VCS]) { if (invalidate_domains & I915_GEM_GPU_DOMAINS) cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD | MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; } else { if (invalidate_domains & I915_GEM_DOMAIN_RENDER) cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW; } intel_logical_ring_emit(ringbuf, cmd); intel_logical_ring_emit(ringbuf, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT); intel_logical_ring_emit(ringbuf, 0); /* upper addr */ intel_logical_ring_emit(ringbuf, 0); /* value */ intel_logical_ring_advance(ringbuf); return 0; } static int gen8_emit_flush_render(struct intel_ringbuffer *ringbuf, u32 invalidate_domains, u32 flush_domains) { struct intel_engine_cs *ring = ringbuf->ring; u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES; u32 flags = 0; int ret; flags |= PIPE_CONTROL_CS_STALL; if (flush_domains) { flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; } if (invalidate_domains) { flags |= PIPE_CONTROL_TLB_INVALIDATE; flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE; flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE; flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE; flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE; flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE; flags |= PIPE_CONTROL_QW_WRITE; flags |= PIPE_CONTROL_GLOBAL_GTT_IVB; } ret = intel_logical_ring_begin(ringbuf, 6); if (ret) return ret; intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6)); intel_logical_ring_emit(ringbuf, flags); intel_logical_ring_emit(ringbuf, scratch_addr); intel_logical_ring_emit(ringbuf, 0); intel_logical_ring_emit(ringbuf, 0); intel_logical_ring_emit(ringbuf, 0); intel_logical_ring_advance(ringbuf); return 0; } static u32 gen8_get_seqno(struct intel_engine_cs *ring, bool lazy_coherency) { return intel_read_status_page(ring, I915_GEM_HWS_INDEX); } static void gen8_set_seqno(struct intel_engine_cs *ring, u32 seqno) { intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno); } static int gen8_emit_request(struct intel_ringbuffer *ringbuf) { struct intel_engine_cs *ring = ringbuf->ring; u32 cmd; int ret; ret = intel_logical_ring_begin(ringbuf, 6); if (ret) return ret; cmd = MI_STORE_DWORD_IMM_GEN8; cmd |= MI_GLOBAL_GTT; intel_logical_ring_emit(ringbuf, cmd); intel_logical_ring_emit(ringbuf, (ring->status_page.gfx_addr + (I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT))); intel_logical_ring_emit(ringbuf, 0); intel_logical_ring_emit(ringbuf, ring->outstanding_lazy_seqno); intel_logical_ring_emit(ringbuf, MI_USER_INTERRUPT); intel_logical_ring_emit(ringbuf, MI_NOOP); intel_logical_ring_advance_and_submit(ringbuf); return 0; } void intel_logical_ring_cleanup(struct intel_engine_cs *ring) { struct drm_i915_private *dev_priv = ring->dev->dev_private; if (!intel_ring_initialized(ring)) return; intel_logical_ring_stop(ring); WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0); ring->preallocated_lazy_request = NULL; ring->outstanding_lazy_seqno = 0; if (ring->cleanup) ring->cleanup(ring); i915_cmd_parser_fini_ring(ring); if (ring->status_page.obj) { kunmap(sg_page(ring->status_page.obj->pages->sgl)); ring->status_page.obj = NULL; } } static int logical_ring_init(struct drm_device *dev, struct intel_engine_cs *ring) { int ret; struct intel_context *dctx = ring->default_context; struct drm_i915_gem_object *dctx_obj; /* Intentionally left blank. */ ring->buffer = NULL; ring->dev = dev; INIT_LIST_HEAD(&ring->active_list); INIT_LIST_HEAD(&ring->request_list); init_waitqueue_head(&ring->irq_queue); INIT_LIST_HEAD(&ring->execlist_queue); spin_lock_init(&ring->execlist_lock); ring->next_context_status_buffer = 0; ret = intel_lr_context_deferred_create(dctx, ring); if (ret) return ret; /* The status page is offset 0 from the context object in LRCs. */ dctx_obj = dctx->engine[ring->id].state; ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(dctx_obj); ring->status_page.page_addr = kmap(sg_page(dctx_obj->pages->sgl)); if (ring->status_page.page_addr == NULL) return -ENOMEM; ring->status_page.obj = dctx_obj; ret = i915_cmd_parser_init_ring(ring); if (ret) return ret; if (ring->init) { ret = ring->init(ring); if (ret) return ret; } return 0; } static int logical_render_ring_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = &dev_priv->ring[RCS]; ring->name = "render ring"; ring->id = RCS; ring->mmio_base = RENDER_RING_BASE; ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT; ring->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT; if (HAS_L3_DPF(dev)) ring->irq_keep_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT; ring->init = gen8_init_render_ring; ring->cleanup = intel_fini_pipe_control; ring->get_seqno = gen8_get_seqno; ring->set_seqno = gen8_set_seqno; ring->emit_request = gen8_emit_request; ring->emit_flush = gen8_emit_flush_render; ring->irq_get = gen8_logical_ring_get_irq; ring->irq_put = gen8_logical_ring_put_irq; ring->emit_bb_start = gen8_emit_bb_start; return logical_ring_init(dev, ring); } static int logical_bsd_ring_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = &dev_priv->ring[VCS]; ring->name = "bsd ring"; ring->id = VCS; ring->mmio_base = GEN6_BSD_RING_BASE; ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT; ring->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT; ring->init = gen8_init_common_ring; ring->get_seqno = gen8_get_seqno; ring->set_seqno = gen8_set_seqno; ring->emit_request = gen8_emit_request; ring->emit_flush = gen8_emit_flush; ring->irq_get = gen8_logical_ring_get_irq; ring->irq_put = gen8_logical_ring_put_irq; ring->emit_bb_start = gen8_emit_bb_start; return logical_ring_init(dev, ring); } static int logical_bsd2_ring_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = &dev_priv->ring[VCS2]; ring->name = "bds2 ring"; ring->id = VCS2; ring->mmio_base = GEN8_BSD2_RING_BASE; ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT; ring->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT; ring->init = gen8_init_common_ring; ring->get_seqno = gen8_get_seqno; ring->set_seqno = gen8_set_seqno; ring->emit_request = gen8_emit_request; ring->emit_flush = gen8_emit_flush; ring->irq_get = gen8_logical_ring_get_irq; ring->irq_put = gen8_logical_ring_put_irq; ring->emit_bb_start = gen8_emit_bb_start; return logical_ring_init(dev, ring); } static int logical_blt_ring_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = &dev_priv->ring[BCS]; ring->name = "blitter ring"; ring->id = BCS; ring->mmio_base = BLT_RING_BASE; ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT; ring->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT; ring->init = gen8_init_common_ring; ring->get_seqno = gen8_get_seqno; ring->set_seqno = gen8_set_seqno; ring->emit_request = gen8_emit_request; ring->emit_flush = gen8_emit_flush; ring->irq_get = gen8_logical_ring_get_irq; ring->irq_put = gen8_logical_ring_put_irq; ring->emit_bb_start = gen8_emit_bb_start; return logical_ring_init(dev, ring); } static int logical_vebox_ring_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = &dev_priv->ring[VECS]; ring->name = "video enhancement ring"; ring->id = VECS; ring->mmio_base = VEBOX_RING_BASE; ring->irq_enable_mask = GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT; ring->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT; ring->init = gen8_init_common_ring; ring->get_seqno = gen8_get_seqno; ring->set_seqno = gen8_set_seqno; ring->emit_request = gen8_emit_request; ring->emit_flush = gen8_emit_flush; ring->irq_get = gen8_logical_ring_get_irq; ring->irq_put = gen8_logical_ring_put_irq; ring->emit_bb_start = gen8_emit_bb_start; return logical_ring_init(dev, ring); } int intel_logical_rings_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = logical_render_ring_init(dev); if (ret) return ret; if (HAS_BSD(dev)) { ret = logical_bsd_ring_init(dev); if (ret) goto cleanup_render_ring; } if (HAS_BLT(dev)) { ret = logical_blt_ring_init(dev); if (ret) goto cleanup_bsd_ring; } if (HAS_VEBOX(dev)) { ret = logical_vebox_ring_init(dev); if (ret) goto cleanup_blt_ring; } if (HAS_BSD2(dev)) { ret = logical_bsd2_ring_init(dev); if (ret) goto cleanup_vebox_ring; } ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000)); if (ret) goto cleanup_bsd2_ring; return 0; cleanup_bsd2_ring: intel_logical_ring_cleanup(&dev_priv->ring[VCS2]); cleanup_vebox_ring: intel_logical_ring_cleanup(&dev_priv->ring[VECS]); cleanup_blt_ring: intel_logical_ring_cleanup(&dev_priv->ring[BCS]); cleanup_bsd_ring: intel_logical_ring_cleanup(&dev_priv->ring[VCS]); cleanup_render_ring: intel_logical_ring_cleanup(&dev_priv->ring[RCS]); return ret; } static int populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_obj, struct intel_engine_cs *ring, struct intel_ringbuffer *ringbuf) { struct drm_i915_gem_object *ring_obj = ringbuf->obj; struct i915_hw_ppgtt *ppgtt = ctx->ppgtt; struct page *page; uint32_t *reg_state; int ret; ret = i915_gem_object_set_to_cpu_domain(ctx_obj, true); if (ret) { DRM_DEBUG_DRIVER("Could not set to CPU domain\n"); return ret; } ret = i915_gem_object_get_pages(ctx_obj); if (ret) { DRM_DEBUG_DRIVER("Could not get object pages\n"); return ret; } i915_gem_object_pin_pages(ctx_obj); /* The second page of the context object contains some fields which must * be set up prior to the first execution. */ page = i915_gem_object_get_page(ctx_obj, 1); reg_state = kmap_atomic(page); /* A context is actually a big batch buffer with several MI_LOAD_REGISTER_IMM * commands followed by (reg, value) pairs. The values we are setting here are * only for the first context restore: on a subsequent save, the GPU will * recreate this batchbuffer with new values (including all the missing * MI_LOAD_REGISTER_IMM commands that we are not initializing here). */ if (ring->id == RCS) reg_state[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(14); else reg_state[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(11); reg_state[CTX_LRI_HEADER_0] |= MI_LRI_FORCE_POSTED; reg_state[CTX_CONTEXT_CONTROL] = RING_CONTEXT_CONTROL(ring); reg_state[CTX_CONTEXT_CONTROL+1] = _MASKED_BIT_ENABLE((1<<3) | MI_RESTORE_INHIBIT); reg_state[CTX_RING_HEAD] = RING_HEAD(ring->mmio_base); reg_state[CTX_RING_HEAD+1] = 0; reg_state[CTX_RING_TAIL] = RING_TAIL(ring->mmio_base); reg_state[CTX_RING_TAIL+1] = 0; reg_state[CTX_RING_BUFFER_START] = RING_START(ring->mmio_base); reg_state[CTX_RING_BUFFER_START+1] = i915_gem_obj_ggtt_offset(ring_obj); reg_state[CTX_RING_BUFFER_CONTROL] = RING_CTL(ring->mmio_base); reg_state[CTX_RING_BUFFER_CONTROL+1] = ((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES) | RING_VALID; reg_state[CTX_BB_HEAD_U] = ring->mmio_base + 0x168; reg_state[CTX_BB_HEAD_U+1] = 0; reg_state[CTX_BB_HEAD_L] = ring->mmio_base + 0x140; reg_state[CTX_BB_HEAD_L+1] = 0; reg_state[CTX_BB_STATE] = ring->mmio_base + 0x110; reg_state[CTX_BB_STATE+1] = (1<<5); reg_state[CTX_SECOND_BB_HEAD_U] = ring->mmio_base + 0x11c; reg_state[CTX_SECOND_BB_HEAD_U+1] = 0; reg_state[CTX_SECOND_BB_HEAD_L] = ring->mmio_base + 0x114; reg_state[CTX_SECOND_BB_HEAD_L+1] = 0; reg_state[CTX_SECOND_BB_STATE] = ring->mmio_base + 0x118; reg_state[CTX_SECOND_BB_STATE+1] = 0; if (ring->id == RCS) { /* TODO: according to BSpec, the register state context * for CHV does not have these. OTOH, these registers do * exist in CHV. I'm waiting for a clarification */ reg_state[CTX_BB_PER_CTX_PTR] = ring->mmio_base + 0x1c0; reg_state[CTX_BB_PER_CTX_PTR+1] = 0; reg_state[CTX_RCS_INDIRECT_CTX] = ring->mmio_base + 0x1c4; reg_state[CTX_RCS_INDIRECT_CTX+1] = 0; reg_state[CTX_RCS_INDIRECT_CTX_OFFSET] = ring->mmio_base + 0x1c8; reg_state[CTX_RCS_INDIRECT_CTX_OFFSET+1] = 0; } reg_state[CTX_LRI_HEADER_1] = MI_LOAD_REGISTER_IMM(9); reg_state[CTX_LRI_HEADER_1] |= MI_LRI_FORCE_POSTED; reg_state[CTX_CTX_TIMESTAMP] = ring->mmio_base + 0x3a8; reg_state[CTX_CTX_TIMESTAMP+1] = 0; reg_state[CTX_PDP3_UDW] = GEN8_RING_PDP_UDW(ring, 3); reg_state[CTX_PDP3_LDW] = GEN8_RING_PDP_LDW(ring, 3); reg_state[CTX_PDP2_UDW] = GEN8_RING_PDP_UDW(ring, 2); reg_state[CTX_PDP2_LDW] = GEN8_RING_PDP_LDW(ring, 2); reg_state[CTX_PDP1_UDW] = GEN8_RING_PDP_UDW(ring, 1); reg_state[CTX_PDP1_LDW] = GEN8_RING_PDP_LDW(ring, 1); reg_state[CTX_PDP0_UDW] = GEN8_RING_PDP_UDW(ring, 0); reg_state[CTX_PDP0_LDW] = GEN8_RING_PDP_LDW(ring, 0); reg_state[CTX_PDP3_UDW+1] = upper_32_bits(ppgtt->pd_dma_addr[3]); reg_state[CTX_PDP3_LDW+1] = lower_32_bits(ppgtt->pd_dma_addr[3]); reg_state[CTX_PDP2_UDW+1] = upper_32_bits(ppgtt->pd_dma_addr[2]); reg_state[CTX_PDP2_LDW+1] = lower_32_bits(ppgtt->pd_dma_addr[2]); reg_state[CTX_PDP1_UDW+1] = upper_32_bits(ppgtt->pd_dma_addr[1]); reg_state[CTX_PDP1_LDW+1] = lower_32_bits(ppgtt->pd_dma_addr[1]); reg_state[CTX_PDP0_UDW+1] = upper_32_bits(ppgtt->pd_dma_addr[0]); reg_state[CTX_PDP0_LDW+1] = lower_32_bits(ppgtt->pd_dma_addr[0]); if (ring->id == RCS) { reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1); reg_state[CTX_R_PWR_CLK_STATE] = 0x20c8; reg_state[CTX_R_PWR_CLK_STATE+1] = 0; } kunmap_atomic(reg_state); ctx_obj->dirty = 1; set_page_dirty(page); i915_gem_object_unpin_pages(ctx_obj); return 0; } void intel_lr_context_free(struct intel_context *ctx) { int i; for (i = 0; i < I915_NUM_RINGS; i++) { struct drm_i915_gem_object *ctx_obj = ctx->engine[i].state; struct intel_ringbuffer *ringbuf = ctx->engine[i].ringbuf; if (ctx_obj) { intel_destroy_ringbuffer_obj(ringbuf); kfree(ringbuf); i915_gem_object_ggtt_unpin(ctx_obj); drm_gem_object_unreference(&ctx_obj->base); } } } static uint32_t get_lr_context_size(struct intel_engine_cs *ring) { int ret = 0; WARN_ON(INTEL_INFO(ring->dev)->gen != 8); switch (ring->id) { case RCS: ret = GEN8_LR_CONTEXT_RENDER_SIZE; break; case VCS: case BCS: case VECS: case VCS2: ret = GEN8_LR_CONTEXT_OTHER_SIZE; break; } return ret; } int intel_lr_context_deferred_create(struct intel_context *ctx, struct intel_engine_cs *ring) { struct drm_device *dev = ring->dev; struct drm_i915_gem_object *ctx_obj; uint32_t context_size; struct intel_ringbuffer *ringbuf; int ret; WARN_ON(ctx->legacy_hw_ctx.rcs_state != NULL); if (ctx->engine[ring->id].state) return 0; context_size = round_up(get_lr_context_size(ring), 4096); ctx_obj = i915_gem_alloc_context_obj(dev, context_size); if (IS_ERR(ctx_obj)) { ret = PTR_ERR(ctx_obj); DRM_DEBUG_DRIVER("Alloc LRC backing obj failed: %d\n", ret); return ret; } ret = i915_gem_obj_ggtt_pin(ctx_obj, GEN8_LR_CONTEXT_ALIGN, 0); if (ret) { DRM_DEBUG_DRIVER("Pin LRC backing obj failed: %d\n", ret); drm_gem_object_unreference(&ctx_obj->base); return ret; } ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL); if (!ringbuf) { DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s\n", ring->name); i915_gem_object_ggtt_unpin(ctx_obj); drm_gem_object_unreference(&ctx_obj->base); ret = -ENOMEM; return ret; } ringbuf->ring = ring; ringbuf->FIXME_lrc_ctx = ctx; ringbuf->size = 32 * PAGE_SIZE; ringbuf->effective_size = ringbuf->size; ringbuf->head = 0; ringbuf->tail = 0; ringbuf->space = ringbuf->size; ringbuf->last_retired_head = -1; /* TODO: For now we put this in the mappable region so that we can reuse * the existing ringbuffer code which ioremaps it. When we start * creating many contexts, this will no longer work and we must switch * to a kmapish interface. */ ret = intel_alloc_ringbuffer_obj(dev, ringbuf); if (ret) { DRM_DEBUG_DRIVER("Failed to allocate ringbuffer obj %s: %d\n", ring->name, ret); goto error; } ret = populate_lr_context(ctx, ctx_obj, ring, ringbuf); if (ret) { DRM_DEBUG_DRIVER("Failed to populate LRC: %d\n", ret); intel_destroy_ringbuffer_obj(ringbuf); goto error; } ctx->engine[ring->id].ringbuf = ringbuf; ctx->engine[ring->id].state = ctx_obj; return 0; error: kfree(ringbuf); i915_gem_object_ggtt_unpin(ctx_obj); drm_gem_object_unreference(&ctx_obj->base); return ret; }