From 01101fa7cc85fffc95798d1f67970dad96063fc6 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 3 Sep 2015 13:01:39 +0100 Subject: [PATCH] drm/i915: Refactor common ringbuffer allocation code A small, very small, step to sharing the duplicate code between execlists and legacy submission engines, starting with the ringbuffer allocation code. Signed-off-by: Chris Wilson Cc: Arun Siluvery Cc: Mika Kuoppala Cc: Dave Gordon Reviewed-by: Paulo Zanoni Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_lrc.c | 49 ++++---------- drivers/gpu/drm/i915/intel_ringbuffer.c | 89 +++++++++++++++---------- drivers/gpu/drm/i915/intel_ringbuffer.h | 8 +-- 3 files changed, 70 insertions(+), 76 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 40cbba4ea4ba..28a712e7d2d0 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -2340,8 +2340,7 @@ void intel_lr_context_free(struct intel_context *ctx) i915_gem_object_ggtt_unpin(ctx_obj); } WARN_ON(ctx->engine[ring->id].pin_count); - intel_destroy_ringbuffer_obj(ringbuf); - kfree(ringbuf); + intel_ringbuffer_free(ringbuf); drm_gem_object_unreference(&ctx_obj->base); } } @@ -2442,42 +2441,20 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, I915_WRITE(GEN8_GTCR, GEN8_GTCR_INVALIDATE); } - ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL); - if (!ringbuf) { - DRM_DEBUG_DRIVER("Failed to allocate ringbuffer %s\n", - ring->name); - ret = -ENOMEM; + ringbuf = intel_engine_create_ringbuffer(ring, 4 * PAGE_SIZE); + if (IS_ERR(ringbuf)) { + ret = PTR_ERR(ringbuf); goto error_unpin_ctx; } - ringbuf->ring = ring; - - ringbuf->size = 4 * PAGE_SIZE; - ringbuf->effective_size = ringbuf->size; - ringbuf->head = 0; - ringbuf->tail = 0; - ringbuf->last_retired_head = -1; - intel_ring_update_space(ringbuf); - - if (ringbuf->obj == NULL) { - ret = intel_alloc_ringbuffer_obj(dev, ringbuf); + if (is_global_default_ctx) { + ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf); if (ret) { - DRM_DEBUG_DRIVER( - "Failed to allocate ringbuffer obj %s: %d\n", - ring->name, ret); - goto error_free_rbuf; + DRM_ERROR( + "Failed to pin and map ringbuffer %s: %d\n", + ring->name, ret); + goto error_ringbuf; } - - if (is_global_default_ctx) { - ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf); - if (ret) { - DRM_ERROR( - "Failed to pin and map ringbuffer %s: %d\n", - ring->name, ret); - goto error_destroy_rbuf; - } - } - } ret = populate_lr_context(ctx, ctx_obj, ring, ringbuf); @@ -2519,10 +2496,8 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, error: if (is_global_default_ctx) intel_unpin_ringbuffer_obj(ringbuf); -error_destroy_rbuf: - intel_destroy_ringbuffer_obj(ringbuf); -error_free_rbuf: - kfree(ringbuf); +error_ringbuf: + intel_ringbuffer_free(ringbuf); error_unpin_ctx: if (is_global_default_ctx) i915_gem_object_ggtt_unpin(ctx_obj); diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 6e6b8db996ef..20a75bb516ac 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1996,14 +1996,14 @@ int intel_pin_and_map_ringbuffer_obj(struct drm_device *dev, return 0; } -void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) +static void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf) { drm_gem_object_unreference(&ringbuf->obj->base); ringbuf->obj = NULL; } -int intel_alloc_ringbuffer_obj(struct drm_device *dev, - struct intel_ringbuffer *ringbuf) +static int intel_alloc_ringbuffer_obj(struct drm_device *dev, + struct intel_ringbuffer *ringbuf) { struct drm_i915_gem_object *obj; @@ -2023,6 +2023,48 @@ int intel_alloc_ringbuffer_obj(struct drm_device *dev, return 0; } +struct intel_ringbuffer * +intel_engine_create_ringbuffer(struct intel_engine_cs *engine, int size) +{ + struct intel_ringbuffer *ring; + int ret; + + ring = kzalloc(sizeof(*ring), GFP_KERNEL); + if (ring == NULL) + return ERR_PTR(-ENOMEM); + + ring->ring = engine; + + ring->size = size; + /* Workaround an erratum on the i830 which causes a hang if + * the TAIL pointer points to within the last 2 cachelines + * of the buffer. + */ + ring->effective_size = size; + if (IS_I830(engine->dev) || IS_845G(engine->dev)) + ring->effective_size -= 2 * CACHELINE_BYTES; + + ring->last_retired_head = -1; + intel_ring_update_space(ring); + + ret = intel_alloc_ringbuffer_obj(engine->dev, ring); + if (ret) { + DRM_ERROR("Failed to allocate ringbuffer %s: %d\n", + engine->name, ret); + kfree(ring); + return ERR_PTR(ret); + } + + return ring; +} + +void +intel_ringbuffer_free(struct intel_ringbuffer *ring) +{ + intel_destroy_ringbuffer_obj(ring); + kfree(ring); +} + static int intel_init_ring_buffer(struct drm_device *dev, struct intel_engine_cs *ring) { @@ -2031,22 +2073,20 @@ static int intel_init_ring_buffer(struct drm_device *dev, WARN_ON(ring->buffer); - ringbuf = kzalloc(sizeof(*ringbuf), GFP_KERNEL); - if (!ringbuf) - return -ENOMEM; - ring->buffer = ringbuf; - ring->dev = dev; INIT_LIST_HEAD(&ring->active_list); INIT_LIST_HEAD(&ring->request_list); INIT_LIST_HEAD(&ring->execlist_queue); i915_gem_batch_pool_init(dev, &ring->batch_pool); - ringbuf->size = 32 * PAGE_SIZE; - ringbuf->ring = ring; memset(ring->semaphore.sync_seqno, 0, sizeof(ring->semaphore.sync_seqno)); init_waitqueue_head(&ring->irq_queue); + ringbuf = intel_engine_create_ringbuffer(ring, 32 * PAGE_SIZE); + if (IS_ERR(ringbuf)) + return PTR_ERR(ringbuf); + ring->buffer = ringbuf; + if (I915_NEED_GFX_HWS(dev)) { ret = init_status_page(ring); if (ret) @@ -2058,15 +2098,6 @@ static int intel_init_ring_buffer(struct drm_device *dev, goto error; } - WARN_ON(ringbuf->obj); - - ret = intel_alloc_ringbuffer_obj(dev, ringbuf); - if (ret) { - DRM_ERROR("Failed to allocate ringbuffer %s: %d\n", - ring->name, ret); - goto error; - } - ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf); if (ret) { DRM_ERROR("Failed to pin and map ringbuffer %s: %d\n", @@ -2075,14 +2106,6 @@ static int intel_init_ring_buffer(struct drm_device *dev, goto error; } - /* Workaround an erratum on the i830 which causes a hang if - * the TAIL pointer points to within the last 2 cachelines - * of the buffer. - */ - ringbuf->effective_size = ringbuf->size; - if (IS_I830(dev) || IS_845G(dev)) - ringbuf->effective_size -= 2 * CACHELINE_BYTES; - ret = i915_cmd_parser_init_ring(ring); if (ret) goto error; @@ -2090,7 +2113,7 @@ static int intel_init_ring_buffer(struct drm_device *dev, return 0; error: - kfree(ringbuf); + intel_ringbuffer_free(ringbuf); ring->buffer = NULL; return ret; } @@ -2098,19 +2121,18 @@ error: void intel_cleanup_ring_buffer(struct intel_engine_cs *ring) { struct drm_i915_private *dev_priv; - struct intel_ringbuffer *ringbuf; if (!intel_ring_initialized(ring)) return; dev_priv = to_i915(ring->dev); - ringbuf = ring->buffer; intel_stop_ring_buffer(ring); WARN_ON(!IS_GEN2(ring->dev) && (I915_READ_MODE(ring) & MODE_IDLE) == 0); - intel_unpin_ringbuffer_obj(ringbuf); - intel_destroy_ringbuffer_obj(ringbuf); + intel_unpin_ringbuffer_obj(ring->buffer); + intel_ringbuffer_free(ring->buffer); + ring->buffer = NULL; if (ring->cleanup) ring->cleanup(ring); @@ -2119,9 +2141,6 @@ void intel_cleanup_ring_buffer(struct intel_engine_cs *ring) i915_cmd_parser_fini_ring(ring); i915_gem_batch_pool_fini(&ring->batch_pool); - - kfree(ringbuf); - ring->buffer = NULL; } static int ring_wait_for_space(struct intel_engine_cs *ring, int n) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 95b0b4b55fa6..49fa41dc0eb6 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -420,12 +420,12 @@ intel_write_status_page(struct intel_engine_cs *ring, #define I915_GEM_HWS_SCRATCH_INDEX 0x40 #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT) -void intel_unpin_ringbuffer_obj(struct intel_ringbuffer *ringbuf); +struct intel_ringbuffer * +intel_engine_create_ringbuffer(struct intel_engine_cs *engine, int size); int intel_pin_and_map_ringbuffer_obj(struct drm_device *dev, struct intel_ringbuffer *ringbuf); -void intel_destroy_ringbuffer_obj(struct intel_ringbuffer *ringbuf); -int intel_alloc_ringbuffer_obj(struct drm_device *dev, - struct intel_ringbuffer *ringbuf); +void intel_unpin_ringbuffer_obj(struct intel_ringbuffer *ringbuf); +void intel_ringbuffer_free(struct intel_ringbuffer *ring); void intel_stop_ring_buffer(struct intel_engine_cs *ring); void intel_cleanup_ring_buffer(struct intel_engine_cs *ring); -- 2.20.1