In order to allow ourselves to use VMA to wrap other entities other than
GEM objects, we need to allow for the vma->obj backpointer to be NULL.
In most cases, we know we are operating on a GEM object and its vma, but
we need the core code (such as i915_vma_pin/insert/bind/unbind) to work
regardless of the innards.
The remaining eyesore here is vma->obj->cache_level and related (but
less of an issue) vma->obj->gt_ro. With a bit of care we should mirror
those on the vma itself.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.william.auld@xxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.william.auld@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 7 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 3 +
drivers/gpu/drm/i915/i915_vma.c | 96 ++++++++++++++++-----------
drivers/gpu/drm/i915/i915_vma.h | 2 +-
4 files changed, 65 insertions(+), 43 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 284ae9574f03..7d527b569d28 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3588,8 +3588,11 @@ void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv)
if (!i915_vma_unbind(vma))
continue;
- WARN_ON(i915_vma_bind(vma, obj->cache_level, PIN_UPDATE));
- WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false));
+ WARN_ON(i915_vma_bind(vma,
+ obj ? obj->cache_level : 0,
+ PIN_UPDATE));
+ if (obj)
+ WARN_ON(i915_gem_object_set_to_gtt_domain(obj, false));
}
ggtt->vm.closed = false;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 758234d20f4e..df524c9cad40 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1050,6 +1050,9 @@ static u32 capture_error_bo(struct drm_i915_error_buffer *err,
int i = 0;
list_for_each_entry(vma, head, vm_link) {
+ if (!vma->obj)
+ continue;
+
if (pinned_only && !i915_vma_is_pinned(vma))
continue;
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 912f16ffe7ee..b71265066cd1 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -345,7 +345,7 @@ void i915_vma_flush_writes(struct i915_vma *vma)
void i915_vma_unpin_iomap(struct i915_vma *vma)
{
- lockdep_assert_held(&vma->obj->base.dev->struct_mutex);
+ lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
GEM_BUG_ON(vma->iomap == NULL);
@@ -365,6 +365,7 @@ void i915_vma_unpin_and_release(struct i915_vma **p_vma)
return;
obj = vma->obj;
+ GEM_BUG_ON(!obj);
i915_vma_unpin(vma);
i915_vma_close(vma);
@@ -489,7 +490,7 @@ static int
i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
{
struct drm_i915_private *dev_priv = vma->vm->i915;
- struct drm_i915_gem_object *obj = vma->obj;
+ unsigned int cache_level;
u64 start, end;
int ret;
@@ -524,16 +525,21 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
* attempt to find space.
*/
if (size > end) {
- DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu [object=%zd] > %s aperture=%llu\n",
- size, obj->base.size,
- flags & PIN_MAPPABLE ? "mappable" : "total",
+ DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu > %s aperture=%llu\n",
+ size, flags & PIN_MAPPABLE ? "mappable" : "total",
end);
return -ENOSPC;
}
- ret = i915_gem_object_pin_pages(obj);
- if (ret)
- return ret;
+ if (vma->obj) {
+ ret = i915_gem_object_pin_pages(vma->obj);
+ if (ret)
+ return ret;
+
+ cache_level = vma->obj->cache_level;
+ } else {
+ cache_level = 0;
+ }
GEM_BUG_ON(vma->pages);
@@ -550,7 +556,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
}
ret = i915_gem_gtt_reserve(vma->vm, &vma->node,
- size, offset, obj->cache_level,
+ size, offset, cache_level,
flags);
if (ret)
goto err_clear;
@@ -589,7 +595,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
}
ret = i915_gem_gtt_insert(vma->vm, &vma->node,
- size, alignment, obj->cache_level,
+ size, alignment, cache_level,
start, end, flags);
if (ret)
goto err_clear;
@@ -598,23 +604,28 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
GEM_BUG_ON(vma->node.start + vma->node.size > end);
}
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
- GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level));
+ GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, cache_level));
list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
- spin_lock(&dev_priv->mm.obj_lock);
- list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list);
- obj->bind_count++;
- spin_unlock(&dev_priv->mm.obj_lock);
+ if (vma->obj) {
+ struct drm_i915_gem_object *obj = vma->obj;
+
+ spin_lock(&dev_priv->mm.obj_lock);
+ list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list);
+ obj->bind_count++;
+ spin_unlock(&dev_priv->mm.obj_lock);
- assert_bind_count(obj);
+ assert_bind_count(obj);
+ }
return 0;
err_clear:
vma->vm->clear_pages(vma);
err_unpin:
- i915_gem_object_unpin_pages(obj);
+ if (vma->obj)
+ i915_gem_object_unpin_pages(vma->obj);
return ret;
}
@@ -622,7 +633,6 @@ static void
i915_vma_remove(struct i915_vma *vma)
{
struct drm_i915_private *i915 = vma->vm->i915;
- struct drm_i915_gem_object *obj = vma->obj;
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
@@ -632,20 +642,26 @@ i915_vma_remove(struct i915_vma *vma)
drm_mm_remove_node(&vma->node);
list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
- /* Since the unbound list is global, only move to that list if
+ /*
+ * Since the unbound list is global, only move to that list if
* no more VMAs exist.
*/
- spin_lock(&i915->mm.obj_lock);
- if (--obj->bind_count == 0)
- list_move_tail(&obj->mm.link, &i915->mm.unbound_list);
- spin_unlock(&i915->mm.obj_lock);
-
- /* And finally now the object is completely decoupled from this vma,
- * we can drop its hold on the backing storage and allow it to be
- * reaped by the shrinker.
- */
- i915_gem_object_unpin_pages(obj);
- assert_bind_count(obj);
+ if (vma->obj) {
+ struct drm_i915_gem_object *obj = vma->obj;
+
+ spin_lock(&i915->mm.obj_lock);
+ if (--obj->bind_count == 0)
+ list_move_tail(&obj->mm.link, &i915->mm.unbound_list);
+ spin_unlock(&i915->mm.obj_lock);
+
+ /*
+ * And finally now the object is completely decoupled from this
+ * vma, we can drop its hold on the backing storage and allow
+ * it to be reaped by the shrinker.
+ */
+ i915_gem_object_unpin_pages(obj);
+ assert_bind_count(obj);
+ }
}
int __i915_vma_do_pin(struct i915_vma *vma,
@@ -670,7 +686,7 @@ int __i915_vma_do_pin(struct i915_vma *vma,
}
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
- ret = i915_vma_bind(vma, vma->obj->cache_level, flags);
+ ret = i915_vma_bind(vma, vma->obj ? vma->obj->cache_level : 0, flags);
if (ret)
goto err_remove;
@@ -727,6 +743,7 @@ void i915_vma_reopen(struct i915_vma *vma)
static void __i915_vma_destroy(struct i915_vma *vma)
{
+ struct drm_i915_private *i915 = vma->vm->i915;
int i;
GEM_BUG_ON(vma->node.allocated);
@@ -738,12 +755,13 @@ static void __i915_vma_destroy(struct i915_vma *vma)
list_del(&vma->obj_link);
list_del(&vma->vm_link);
- rb_erase(&vma->obj_node, &vma->obj->vma_tree);
+ if (vma->obj)
+ rb_erase(&vma->obj_node, &vma->obj->vma_tree);
if (!i915_vma_is_ggtt(vma))
i915_ppgtt_put(i915_vm_to_ppgtt(vma->vm));
- kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma);
+ kmem_cache_free(i915->vmas, vma);
}
void i915_vma_destroy(struct i915_vma *vma)
@@ -809,13 +827,13 @@ void i915_vma_revoke_mmap(struct i915_vma *vma)
int i915_vma_unbind(struct i915_vma *vma)
{
- struct drm_i915_gem_object *obj = vma->obj;
unsigned long active;
int ret;
- lockdep_assert_held(&obj->base.dev->struct_mutex);
+ lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
- /* First wait upon any activity as retiring the request may
+ /*
+ * First wait upon any activity as retiring the request may
* have side-effects such as unpinning or even unbinding this vma.
*/
might_sleep();
@@ -823,7 +841,8 @@ int i915_vma_unbind(struct i915_vma *vma)
if (active) {
int idx;
- /* When a closed VMA is retired, it is unbound - eek.
+ /*
+ * When a closed VMA is retired, it is unbound - eek.
* In order to prevent it from being recursively closed,
* take a pin on the vma so that the second unbind is
* aborted.
@@ -861,9 +880,6 @@ int i915_vma_unbind(struct i915_vma *vma)
if (!drm_mm_node_allocated(&vma->node))
return 0;
- GEM_BUG_ON(obj->bind_count == 0);
- GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));
-
if (i915_vma_is_map_and_fenceable(vma)) {
/*
* Check that we have flushed all writes through the GGTT
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index fc4294cfaa91..f0532f1a4953 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -407,7 +407,7 @@ static inline void __i915_vma_unpin_fence(struct i915_vma *vma)
static inline void
i915_vma_unpin_fence(struct i915_vma *vma)
{
- lockdep_assert_held(&vma->obj->base.dev->struct_mutex);
+ /* lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); */
if (vma->fence)
__i915_vma_unpin_fence(vma);
}
--
2.17.1
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