From: Oscar Mateo Date: Wed, 22 Mar 2017 17:39:45 +0000 (-0700) Subject: drm/i915/guc: Keep the ctx_pool_vaddr mapped, for easy access X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=73b055349c40ac721f4939263f173c2238524091;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915/guc: Keep the ctx_pool_vaddr mapped, for easy access The GuC descriptor is big in size. If we use a local definition of guc_desc we have a chance to overflow stack, so avoid it. Also, Chris abhors scatterlists :) v2: Rebased, helper function to retrieve the context descriptor, s/ctx_pool_vma/ctx_pool/ v3: Zero out guc_context_desc before initialization v4: Do not do arithmetic on void pointers (Daniele) v5: Nicer than arithmetic on pointers (Chris, Joonas) Signed-off-by: Oscar Mateo Cc: Daniele Ceraolo Spurio Reviewed-by: Chris Wilson Reviewed-by: Joonas Lahtinen Signed-off-by: Joonas Lahtinen --- diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index be88bbebd155..9ba69276754b 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -133,6 +133,13 @@ static int __guc_deallocate_doorbell(struct intel_guc *guc, u32 ctx_index) return intel_guc_send(guc, action, ARRAY_SIZE(action)); } +static struct guc_context_desc *__get_context_desc(struct i915_guc_client *client) +{ + struct guc_context_desc *base = client->guc->ctx_pool_vaddr; + + return &base[client->ctx_index]; +} + /* * Initialise, update, or clear doorbell data shared with the GuC * @@ -142,21 +149,11 @@ static int __guc_deallocate_doorbell(struct intel_guc *guc, u32 ctx_index) static int __update_doorbell_desc(struct i915_guc_client *client, u16 new_id) { - struct sg_table *sg = client->guc->ctx_pool_vma->pages; - struct guc_context_desc desc; - size_t len; + struct guc_context_desc *desc; /* Update the GuC's idea of the doorbell ID */ - len = sg_pcopy_to_buffer(sg->sgl, sg->nents, &desc, sizeof(desc), - sizeof(desc) * client->ctx_index); - if (len != sizeof(desc)) - return -EFAULT; - - desc.db_id = new_id; - len = sg_pcopy_from_buffer(sg->sgl, sg->nents, &desc, sizeof(desc), - sizeof(desc) * client->ctx_index); - if (len != sizeof(desc)) - return -EFAULT; + desc = __get_context_desc(client); + desc->db_id = new_id; return 0; } @@ -271,29 +268,28 @@ static void guc_proc_desc_init(struct intel_guc *guc, * data structures relating to this client (doorbell, process descriptor, * write queue, etc). */ - static void guc_ctx_desc_init(struct intel_guc *guc, struct i915_guc_client *client) { struct drm_i915_private *dev_priv = guc_to_i915(guc); struct intel_engine_cs *engine; struct i915_gem_context *ctx = client->owner; - struct guc_context_desc desc; - struct sg_table *sg; + struct guc_context_desc *desc; unsigned int tmp; u32 gfx_addr; - memset(&desc, 0, sizeof(desc)); + desc = __get_context_desc(client); + memset(desc, 0, sizeof(*desc)); - desc.attribute = GUC_CTX_DESC_ATTR_ACTIVE | GUC_CTX_DESC_ATTR_KERNEL; - desc.context_id = client->ctx_index; - desc.priority = client->priority; - desc.db_id = client->doorbell_id; + desc->attribute = GUC_CTX_DESC_ATTR_ACTIVE | GUC_CTX_DESC_ATTR_KERNEL; + desc->context_id = client->ctx_index; + desc->priority = client->priority; + desc->db_id = client->doorbell_id; for_each_engine_masked(engine, dev_priv, client->engines, tmp) { struct intel_context *ce = &ctx->engine[engine->id]; uint32_t guc_engine_id = engine->guc_id; - struct guc_execlist_context *lrc = &desc.lrc[guc_engine_id]; + struct guc_execlist_context *lrc = &desc->lrc[guc_engine_id]; /* TODO: We have a design issue to be solved here. Only when we * receive the first batch, we know which engine is used by the @@ -318,49 +314,40 @@ static void guc_ctx_desc_init(struct intel_guc *guc, lrc->ring_next_free_location = lrc->ring_begin; lrc->ring_current_tail_pointer_value = 0; - desc.engines_used |= (1 << guc_engine_id); + desc->engines_used |= (1 << guc_engine_id); } DRM_DEBUG_DRIVER("Host engines 0x%x => GuC engines used 0x%x\n", - client->engines, desc.engines_used); - WARN_ON(desc.engines_used == 0); + client->engines, desc->engines_used); + WARN_ON(desc->engines_used == 0); /* * The doorbell, process descriptor, and workqueue are all parts * of the client object, which the GuC will reference via the GGTT */ gfx_addr = guc_ggtt_offset(client->vma); - desc.db_trigger_phy = sg_dma_address(client->vma->pages->sgl) + + desc->db_trigger_phy = sg_dma_address(client->vma->pages->sgl) + client->doorbell_offset; - desc.db_trigger_cpu = (uintptr_t)__get_doorbell(client); - desc.db_trigger_uk = gfx_addr + client->doorbell_offset; - desc.process_desc = gfx_addr + client->proc_desc_offset; - desc.wq_addr = gfx_addr + client->wq_offset; - desc.wq_size = client->wq_size; + desc->db_trigger_cpu = (uintptr_t)__get_doorbell(client); + desc->db_trigger_uk = gfx_addr + client->doorbell_offset; + desc->process_desc = gfx_addr + client->proc_desc_offset; + desc->wq_addr = gfx_addr + client->wq_offset; + desc->wq_size = client->wq_size; /* * XXX: Take LRCs from an existing context if this is not an * IsKMDCreatedContext client */ - desc.desc_private = (uintptr_t)client; - - /* Pool context is pinned already */ - sg = guc->ctx_pool_vma->pages; - sg_pcopy_from_buffer(sg->sgl, sg->nents, &desc, sizeof(desc), - sizeof(desc) * client->ctx_index); + desc->desc_private = (uintptr_t)client; } static void guc_ctx_desc_fini(struct intel_guc *guc, struct i915_guc_client *client) { - struct guc_context_desc desc; - struct sg_table *sg; + struct guc_context_desc *desc; - memset(&desc, 0, sizeof(desc)); - - sg = guc->ctx_pool_vma->pages; - sg_pcopy_from_buffer(sg->sgl, sg->nents, &desc, sizeof(desc), - sizeof(desc) * client->ctx_index); + desc = __get_context_desc(client); + memset(desc, 0, sizeof(*desc)); } /** @@ -1023,6 +1010,7 @@ int i915_guc_submission_init(struct drm_i915_private *dev_priv) const size_t gemsize = round_up(poolsize, PAGE_SIZE); struct intel_guc *guc = &dev_priv->guc; struct i915_vma *vma; + void *vaddr; if (!HAS_GUC_SCHED(dev_priv)) return 0; @@ -1034,14 +1022,21 @@ int i915_guc_submission_init(struct drm_i915_private *dev_priv) if (!i915.enable_guc_submission) return 0; /* not enabled */ - if (guc->ctx_pool_vma) + if (guc->ctx_pool) return 0; /* already allocated */ vma = intel_guc_allocate_vma(guc, gemsize); if (IS_ERR(vma)) return PTR_ERR(vma); - guc->ctx_pool_vma = vma; + guc->ctx_pool = vma; + + vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB); + if (IS_ERR(vaddr)) + goto err; + + guc->ctx_pool_vaddr = vaddr; + ida_init(&guc->ctx_ids); intel_guc_log_create(guc); guc_addon_create(guc); @@ -1216,9 +1211,12 @@ void i915_guc_submission_fini(struct drm_i915_private *dev_priv) i915_vma_unpin_and_release(&guc->ads_vma); i915_vma_unpin_and_release(&guc->log.vma); - if (guc->ctx_pool_vma) + if (guc->ctx_pool_vaddr) { ida_destroy(&guc->ctx_ids); - i915_vma_unpin_and_release(&guc->ctx_pool_vma); + i915_gem_object_unpin_map(guc->ctx_pool->obj); + } + + i915_vma_unpin_and_release(&guc->ctx_pool); } /** diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c index 2f270d02894c..1a6e47818a58 100644 --- a/drivers/gpu/drm/i915/intel_guc_loader.c +++ b/drivers/gpu/drm/i915/intel_guc_loader.c @@ -156,7 +156,7 @@ static void guc_params_init(struct drm_i915_private *dev_priv) /* If GuC submission is enabled, set up additional parameters here */ if (i915.enable_guc_submission) { - u32 pgs = guc_ggtt_offset(dev_priv->guc.ctx_pool_vma); + u32 pgs = guc_ggtt_offset(dev_priv->guc.ctx_pool); u32 ctx_in_16 = GUC_MAX_GPU_CONTEXTS / 16; pgs >>= PAGE_SHIFT; diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h index c3a3843e702a..77f7153556e8 100644 --- a/drivers/gpu/drm/i915/intel_uc.h +++ b/drivers/gpu/drm/i915/intel_uc.h @@ -153,7 +153,8 @@ struct intel_guc { bool interrupts_enabled; struct i915_vma *ads_vma; - struct i915_vma *ctx_pool_vma; + struct i915_vma *ctx_pool; + void *ctx_pool_vaddr; struct ida ctx_ids; struct i915_guc_client *execbuf_client;