From 2f63315692b1d3c055972ad33fc7168ae908b97b Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Wed, 17 Jul 2013 12:19:03 -0700 Subject: drm/i915: Create VMAs Formerly: "drm/i915: Create VMAs (part 1)" In a previous patch, the notion of a VM was introduced. A VMA describes an area of part of the VM address space. A VMA is similar to the concept in the linux mm. However, instead of representing regular memory, a VMA is backed by a GEM BO. There may be many VMAs for a given object, one for each VM the object is to be used in. This may occur through flink, dma-buf, or a number of other transient states. Currently the code depends on only 1 VMA per object, for the global GTT (and aliasing PPGTT). The following patches will address this and make the rest of the infrastructure more suited v2: s/i915_obj/i915_gem_obj (Chris) v3: Only move an object to the now global unbound list if there are no more VMAs for the object which are bound into a VM (ie. the list is empty). v4: killed obj->gtt_space some reworks due to rebase v5: Free vma on error path (Imre) v6: Another missed vma free in i915_gem_object_bind_to_gtt error path (Imre) Fixed vma freeing in stolen preallocation (Imre) Signed-off-by: Ben Widawsky Reviewed-by: Imre Deak [danvet: Squash in fixup from Ben to not deref a non-existing vma in set_cache_level, reported by Chris.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_evict.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'drivers/gpu/drm/i915/i915_gem_evict.c') diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c index 43b82350d8dc..df61f338dea1 100644 --- a/drivers/gpu/drm/i915/i915_gem_evict.c +++ b/drivers/gpu/drm/i915/i915_gem_evict.c @@ -34,11 +34,13 @@ static bool mark_free(struct drm_i915_gem_object *obj, struct list_head *unwind) { + struct i915_vma *vma = __i915_gem_obj_to_vma(obj); + if (obj->pin_count) return false; list_add(&obj->exec_list, unwind); - return drm_mm_scan_add_block(&obj->gtt_space); + return drm_mm_scan_add_block(&vma->node); } int @@ -49,6 +51,7 @@ i915_gem_evict_something(struct drm_device *dev, int min_size, drm_i915_private_t *dev_priv = dev->dev_private; struct i915_address_space *vm = &dev_priv->gtt.base; struct list_head eviction_list, unwind_list; + struct i915_vma *vma; struct drm_i915_gem_object *obj; int ret = 0; @@ -106,8 +109,8 @@ none: obj = list_first_entry(&unwind_list, struct drm_i915_gem_object, exec_list); - - ret = drm_mm_scan_remove_block(&obj->gtt_space); + vma = __i915_gem_obj_to_vma(obj); + ret = drm_mm_scan_remove_block(&vma->node); BUG_ON(ret); list_del_init(&obj->exec_list); @@ -127,7 +130,8 @@ found: obj = list_first_entry(&unwind_list, struct drm_i915_gem_object, exec_list); - if (drm_mm_scan_remove_block(&obj->gtt_space)) { + vma = __i915_gem_obj_to_vma(obj); + if (drm_mm_scan_remove_block(&vma->node)) { list_move(&obj->exec_list, &eviction_list); drm_gem_object_reference(&obj->base); continue; -- cgit v1.2.3