From 6fe4f14044f181e146cdc15485428f95fa541ce8 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 10 Jan 2011 17:35:37 +0000 Subject: [PATCH] drm/i915/execbuffer: Reorder binding of objects to favour restrictions As the mappable portion of the aperture is always a small subset at the start of the GTT, it is allocated preferentially by drm_mm. This is useful in case we ever need to map an object later. However, if you have a large object that can consume the entire mappable region of the GTT this prevents the batchbuffer from fitting and so causing an error. Instead allocate all those that require a mapping up front in order to improve the likelihood of finding sufficient space to bind them. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gem_execbuffer.c | 72 ++++++++++++++-------- 2 files changed, 47 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 6130f77c26bf..385fc7ec39d3 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -796,6 +796,7 @@ struct drm_i915_gem_object { */ struct hlist_node exec_node; unsigned long exec_handle; + struct drm_i915_gem_exec_object2 *exec_entry; /** * Current offset of the object in GTT space. diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 0445770cc23c..e69834341ef0 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -268,7 +268,6 @@ eb_destroy(struct eb_objects *eb) static int i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, struct eb_objects *eb, - struct drm_i915_gem_exec_object2 *entry, struct drm_i915_gem_relocation_entry *reloc) { struct drm_device *dev = obj->base.dev; @@ -411,10 +410,10 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, static int i915_gem_execbuffer_relocate_object(struct drm_i915_gem_object *obj, - struct eb_objects *eb, - struct drm_i915_gem_exec_object2 *entry) + struct eb_objects *eb) { struct drm_i915_gem_relocation_entry __user *user_relocs; + struct drm_i915_gem_exec_object2 *entry = obj->exec_entry; int i, ret; user_relocs = (void __user *)(uintptr_t)entry->relocs_ptr; @@ -426,7 +425,7 @@ i915_gem_execbuffer_relocate_object(struct drm_i915_gem_object *obj, sizeof(reloc))) return -EFAULT; - ret = i915_gem_execbuffer_relocate_entry(obj, eb, entry, &reloc); + ret = i915_gem_execbuffer_relocate_entry(obj, eb, &reloc); if (ret) return ret; @@ -442,13 +441,13 @@ i915_gem_execbuffer_relocate_object(struct drm_i915_gem_object *obj, static int i915_gem_execbuffer_relocate_object_slow(struct drm_i915_gem_object *obj, struct eb_objects *eb, - struct drm_i915_gem_exec_object2 *entry, struct drm_i915_gem_relocation_entry *relocs) { + const struct drm_i915_gem_exec_object2 *entry = obj->exec_entry; int i, ret; for (i = 0; i < entry->relocation_count; i++) { - ret = i915_gem_execbuffer_relocate_entry(obj, eb, entry, &relocs[i]); + ret = i915_gem_execbuffer_relocate_entry(obj, eb, &relocs[i]); if (ret) return ret; } @@ -459,8 +458,7 @@ i915_gem_execbuffer_relocate_object_slow(struct drm_i915_gem_object *obj, static int i915_gem_execbuffer_relocate(struct drm_device *dev, struct eb_objects *eb, - struct list_head *objects, - struct drm_i915_gem_exec_object2 *exec) + struct list_head *objects) { struct drm_i915_gem_object *obj; int ret; @@ -468,7 +466,7 @@ i915_gem_execbuffer_relocate(struct drm_device *dev, list_for_each_entry(obj, objects, exec_list) { obj->base.pending_read_domains = 0; obj->base.pending_write_domain = 0; - ret = i915_gem_execbuffer_relocate_object(obj, eb, exec++); + ret = i915_gem_execbuffer_relocate_object(obj, eb); if (ret) return ret; } @@ -479,13 +477,36 @@ i915_gem_execbuffer_relocate(struct drm_device *dev, static int i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring, struct drm_file *file, - struct list_head *objects, - struct drm_i915_gem_exec_object2 *exec) + struct list_head *objects) { struct drm_i915_gem_object *obj; - struct drm_i915_gem_exec_object2 *entry; int ret, retry; bool has_fenced_gpu_access = INTEL_INFO(ring->dev)->gen < 4; + struct list_head ordered_objects; + + INIT_LIST_HEAD(&ordered_objects); + while (!list_empty(objects)) { + struct drm_i915_gem_exec_object2 *entry; + bool need_fence, need_mappable; + + obj = list_first_entry(objects, + struct drm_i915_gem_object, + exec_list); + entry = obj->exec_entry; + + need_fence = + has_fenced_gpu_access && + entry->flags & EXEC_OBJECT_NEEDS_FENCE && + obj->tiling_mode != I915_TILING_NONE; + need_mappable = + entry->relocation_count ? true : need_fence; + + if (need_mappable) + list_move(&obj->exec_list, &ordered_objects); + else + list_move_tail(&obj->exec_list, &ordered_objects); + } + list_splice(&ordered_objects, objects); /* Attempt to pin all of the buffers into the GTT. * This is done in 3 phases: @@ -504,14 +525,11 @@ i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring, ret = 0; /* Unbind any ill-fitting objects or pin. */ - entry = exec; list_for_each_entry(obj, objects, exec_list) { + struct drm_i915_gem_exec_object2 *entry = obj->exec_entry; bool need_fence, need_mappable; - - if (!obj->gtt_space) { - entry++; + if (!obj->gtt_space) continue; - } need_fence = has_fenced_gpu_access && @@ -534,8 +552,8 @@ i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring, } /* Bind fresh objects */ - entry = exec; list_for_each_entry(obj, objects, exec_list) { + struct drm_i915_gem_exec_object2 *entry = obj->exec_entry; bool need_fence; need_fence = @@ -570,7 +588,6 @@ i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring, } entry->offset = obj->gtt_offset; - entry++; } /* Decrement pin count for bound objects */ @@ -680,10 +697,11 @@ i915_gem_execbuffer_relocate_slow(struct drm_device *dev, list_add_tail(&obj->exec_list, objects); obj->exec_handle = exec[i].handle; + obj->exec_entry = &exec[i]; eb_add_object(eb, obj); } - ret = i915_gem_execbuffer_reserve(ring, file, objects, exec); + ret = i915_gem_execbuffer_reserve(ring, file, objects); if (ret) goto err; @@ -692,7 +710,6 @@ i915_gem_execbuffer_relocate_slow(struct drm_device *dev, obj->base.pending_read_domains = 0; obj->base.pending_write_domain = 0; ret = i915_gem_execbuffer_relocate_object_slow(obj, eb, - exec, reloc + total); if (ret) goto err; @@ -1110,16 +1127,22 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, list_add_tail(&obj->exec_list, &objects); obj->exec_handle = exec[i].handle; + obj->exec_entry = &exec[i]; eb_add_object(eb, obj); } + /* take note of the batch buffer before we might reorder the lists */ + batch_obj = list_entry(objects.prev, + struct drm_i915_gem_object, + exec_list); + /* Move the objects en-masse into the GTT, evicting if necessary. */ - ret = i915_gem_execbuffer_reserve(ring, file, &objects, exec); + ret = i915_gem_execbuffer_reserve(ring, file, &objects); if (ret) goto err; /* The objects are in their final locations, apply the relocations. */ - ret = i915_gem_execbuffer_relocate(dev, eb, &objects, exec); + ret = i915_gem_execbuffer_relocate(dev, eb, &objects); if (ret) { if (ret == -EFAULT) { ret = i915_gem_execbuffer_relocate_slow(dev, file, ring, @@ -1133,9 +1156,6 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, } /* Set the pending read domains for the batch buffer to COMMAND */ - batch_obj = list_entry(objects.prev, - struct drm_i915_gem_object, - exec_list); if (batch_obj->base.pending_write_domain) { DRM_ERROR("Attempting to use self-modifying batch buffer\n"); ret = -EINVAL; -- 2.39.5