@@ -523,8 +523,7 @@ static void vm_free_page(struct i915_address_space *vm, struct page *page)
spin_unlock(&vm->free_pages.lock);
}
-static void i915_address_space_init(struct i915_address_space *vm,
- struct drm_i915_private *dev_priv)
+static void i915_address_space_init(struct i915_address_space *vm, int subclass)
{
/*
* The vm->mutex must be reclaim safe (for use in the shrinker).
@@ -532,6 +531,7 @@ static void i915_address_space_init(struct i915_address_space *vm,
* attempt holding the lock is immediately reported by lockdep.
*/
mutex_init(&vm->mutex);
+ lockdep_set_subclass(&vm->mutex, subclass);
i915_gem_shrinker_taints_mutex(&vm->mutex);
GEM_BUG_ON(!vm->total);
@@ -1658,7 +1658,7 @@ static struct i915_hw_ppgtt *gen8_ppgtt_create(struct drm_i915_private *i915)
*/
ppgtt->vm.has_read_only = !intel_vgpu_active(i915);
- i915_address_space_init(&ppgtt->vm, i915);
+ i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
/* There are only few exceptions for gen >=6. chv and bxt.
* And we are not sure about the latter so play safe for now.
@@ -2165,7 +2165,7 @@ static struct i915_hw_ppgtt *gen6_ppgtt_create(struct drm_i915_private *i915)
ppgtt->base.vm.total = I915_PDES * GEN6_PTES * PAGE_SIZE;
- i915_address_space_init(&ppgtt->base.vm, i915);
+ i915_address_space_init(&ppgtt->base.vm, VM_CLASS_PPGTT);
ppgtt->base.vm.allocate_va_range = gen6_alloc_va_range;
ppgtt->base.vm.clear_range = gen6_ppgtt_clear_range;
@@ -3608,7 +3608,7 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv)
* and beyond the end of the GTT if we do not provide a guard.
*/
mutex_lock(&dev_priv->drm.struct_mutex);
- i915_address_space_init(&ggtt->vm, dev_priv);
+ i915_address_space_init(&ggtt->vm, VM_CLASS_GGTT);
/* Only VLV supports read-only GGTT mappings */
ggtt->vm.has_read_only = IS_VALLEYVIEW(dev_priv);
@@ -293,6 +293,8 @@ struct i915_address_space {
bool closed;
struct mutex mutex; /* protects vma and our lists */
+#define VM_CLASS_GGTT 0
+#define VM_CLASS_PPGTT 1
struct i915_page_dma scratch_page;
struct i915_page_table *scratch_pt;
@@ -70,7 +70,7 @@ mock_ppgtt(struct drm_i915_private *i915,
ppgtt->vm.total = round_down(U64_MAX, PAGE_SIZE);
ppgtt->vm.file = ERR_PTR(-ENODEV);
- i915_address_space_init(&ppgtt->vm, i915);
+ i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
ppgtt->vm.clear_range = nop_clear_range;
ppgtt->vm.insert_page = mock_insert_page;
@@ -117,7 +117,7 @@ void mock_init_ggtt(struct drm_i915_private *i915)
ggtt->vm.vma_ops.set_pages = ggtt_set_pages;
ggtt->vm.vma_ops.clear_pages = clear_pages;
- i915_address_space_init(&ggtt->vm, i915);
+ i915_address_space_init(&ggtt->vm, VM_CLASS_GGTT);
}
void mock_fini_ggtt(struct drm_i915_private *i915)
We have two classes of VM, global GTT and per-process GTT. In order to allow ourselves the freedom to mix both along call chains, distinguish the two classes with regards to their mutex and lockdep maps. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> --- drivers/gpu/drm/i915/i915_gem_gtt.c | 10 +++++----- drivers/gpu/drm/i915/i915_gem_gtt.h | 2 ++ drivers/gpu/drm/i915/selftests/mock_gtt.c | 4 ++-- 3 files changed, 9 insertions(+), 7 deletions(-)