From 84c2377fcee7a43cd964b62143e9a3714130bb0c Mon Sep 17 00:00:00 2001 From: Oscar Mateo Date: Thu, 24 Jul 2014 17:04:15 +0100 Subject: [PATCH] drm/i915/bdw: Allocate ringbuffers for Logical Ring Contexts As we have said a couple of times by now, logical ring contexts have their own ringbuffers: not only the backing pages, but the whole management struct. In a previous version of the series, this was achieved with two separate patches: drm/i915/bdw: Allocate ringbuffer backing objects for default global LRC drm/i915/bdw: Allocate ringbuffer for user-created LRCs Signed-off-by: Oscar Mateo Reviewed-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_lrc.c | 38 +++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_ringbuffer.c | 6 ++-- drivers/gpu/drm/i915/intel_ringbuffer.h | 4 +++ 4 files changed, 46 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index cbae19bab4bf..eccb8e406e9c 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -635,6 +635,7 @@ struct intel_context { /* Execlists */ struct { struct drm_i915_gem_object *state; + struct intel_ringbuffer *ringbuf; } engine[I915_NUM_RINGS]; struct list_head link; diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 9f30ee80e487..0c80bb1f5420 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -65,7 +65,11 @@ void intel_lr_context_free(struct intel_context *ctx) 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); } @@ -99,6 +103,7 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, 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); @@ -119,6 +124,39 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, 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->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); + kfree(ringbuf); + i915_gem_object_ggtt_unpin(ctx_obj); + drm_gem_object_unreference(&ctx_obj->base); + return ret; + } + + ctx->engine[ring->id].ringbuf = ringbuf; ctx->engine[ring->id].state = ctx_obj; return 0; diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index a059b64a0fb2..064652034d7e 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1519,7 +1519,7 @@ static int init_phys_status_page(struct intel_engine_cs *ring) return 0; } -static void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) +void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) { if (!ringbuf->obj) return; @@ -1530,8 +1530,8 @@ static void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) ringbuf->obj = NULL; } -static int intel_alloc_ringbuffer_obj(struct drm_device *dev, - struct intel_ringbuffer *ringbuf) +int intel_alloc_ringbuffer_obj(struct drm_device *dev, + struct intel_ringbuffer *ringbuf) { struct drm_i915_private *dev_priv = to_i915(dev); struct drm_i915_gem_object *obj; diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 70525d0c2c74..669cc7527f9a 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -355,6 +355,10 @@ intel_write_status_page(struct intel_engine_cs *ring, #define I915_GEM_HWS_SCRATCH_INDEX 0x30 #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT) +void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf); +int intel_alloc_ringbuffer_obj(struct drm_device *dev, + struct intel_ringbuffer *ringbuf); + void intel_stop_ring_buffer(struct intel_engine_cs *ring); void intel_cleanup_ring_buffer(struct intel_engine_cs *ring); -- 2.20.1