Since we are operating at the global level, we can simply iterate over
the bound list using the robust method developed for the shrinker.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/i915_gem_evict.c | 54 +++++++++++++++++-------------
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 2 +-
3 files changed, 32 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c48909f6baa2..97372869097f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2994,7 +2994,7 @@ int __must_check i915_gem_evict_something(struct
drm_device *dev,
int __must_check
i915_gem_evict_range(struct drm_device *dev, struct i915_address_space *vm,
unsigned long start, unsigned long end);
-int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle);
+int i915_gem_evict_vm(struct i915_address_space *vm);
int i915_gem_evict_everything(struct drm_device *dev);
/* belongs in i915_gem_gtt.h */
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c
b/drivers/gpu/drm/i915/i915_gem_evict.c
index 9754740edecd..cf33f982da8e 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -254,7 +254,6 @@ i915_gem_evict_range(struct drm_device *dev, struct
i915_address_space *vm,
/**
* i915_gem_evict_vm - Evict all idle vmas from a vm
* @vm: Address space to cleanse
- * @do_idle: Boolean directing whether to idle first.
*
* This function evicts all idles vmas from a vm. If all unpinned vmas should
be
* evicted the @do_idle needs to be set to true.
@@ -265,7 +264,7 @@ i915_gem_evict_range(struct drm_device *dev, struct
i915_address_space *vm,
* To clarify: This is for freeing up virtual address space, not for freeing
* memory in e.g. the shrinker.
*/
-int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle)
+int i915_gem_evict_vm(struct i915_address_space *vm)
{
struct i915_vma *vma, *next;
int ret;
@@ -273,16 +272,14 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool
do_idle)
WARN_ON(!mutex_is_locked(&vm->dev->struct_mutex));
trace_i915_gem_evict_vm(vm);
- if (do_idle) {
- ret = i915_gpu_idle(vm->dev);
- if (ret)
- return ret;
-
- i915_gem_retire_requests(vm->dev);
+ ret = i915_gpu_idle(vm->dev);
+ if (ret)
+ return ret;
- WARN_ON(!list_empty(&vm->active_list));
- }
+ i915_gem_retire_requests(vm->dev);
+ WARN_ON(!list_empty(&vm->active_list));
+ /* Having flushed everything, unbind() should never raise an error */
list_for_each_entry_safe(vma, next, &vm->inactive_list, mm_list)
if (vma->pin_count == 0)
WARN_ON(i915_vma_unbind(vma));
@@ -297,23 +294,19 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool
do_idle)
* This functions tries to evict all gem objects from all address spaces. Used
* by the shrinker as a last-ditch effort and for suspend, before releasing the
* backing storage of all unbound objects.
+ *
+ * This is similar to i915_gem_shrink_all() with the important exception that
+ * we keep a reference to the obj->pages after unbinding (so we can avoid
+ * any expensive migration between the CPU and GPU).
*/
int
i915_gem_evict_everything(struct drm_device *dev)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct i915_address_space *vm, *v;
- bool lists_empty = true;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct list_head still_in_list;
int ret;
- list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
- lists_empty = (list_empty(&vm->inactive_list) &&
- list_empty(&vm->active_list));
- if (!lists_empty)
- lists_empty = false;
- }
-
- if (lists_empty)
+ if (list_empty(&dev_priv->mm.bound_list))
return -ENOSPC;
trace_i915_gem_evict_everything(dev);
@@ -328,9 +321,22 @@ i915_gem_evict_everything(struct drm_device *dev)
i915_gem_retire_requests(dev);
- /* Having flushed everything, unbind() should never raise an error */
- list_for_each_entry_safe(vm, v, &dev_priv->vm_list, global_link)
- WARN_ON(i915_gem_evict_vm(vm, false));
+ INIT_LIST_HEAD(&still_in_list);
+ while (!list_empty(&dev_priv->mm.bound_list)) {
+ struct drm_i915_gem_object *obj;
+ struct i915_vma *vma, *v;
+
+ obj = list_first_entry(&dev_priv->mm.bound_list,
+ typeof(*obj), global_list);
+ list_move_tail(&obj->global_list, &still_in_list);
+
+ drm_gem_object_reference(&obj->base);
+ list_for_each_entry_safe(vma, v, &obj->vma_list, vma_link)
+ if (WARN_ON(i915_vma_unbind(vma)))
+ break;
+ drm_gem_object_unreference(&obj->base);
+ }
+ list_splice(&still_in_list, &dev_priv->mm.bound_list);
return 0;
}
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 9afd2dcba43b..bd48393fb91f 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -820,7 +820,7 @@ err:
list_for_each_entry(vma, vmas, exec_list)
i915_gem_execbuffer_unreserve_vma(vma);
- ret = i915_gem_evict_vm(vm, true);
+ ret = i915_gem_evict_vm(vm);
if (ret)
return ret;
} while (1);
--
2.1.4
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