[PATCH 87/88] drm/i915: Mark the context and address space as closed
Chris Wilson
chris at chris-wilson.co.uk
Mon Apr 18 22:46:06 UTC 2016
When the user closes the context mark it and the dependent address space
as closed. As we use an asynchronous destruct method, this has two purposes.
First it allows us to flag the closed context and detect internal errors if
we to create any new objects for it (as it is removed from the user's
namespace, these should be internal bugs only). And secondly, it allows
us to immediately reap stale vma.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/i915_gem.c | 15 ++++++------
drivers/gpu/drm/i915/i915_gem_context.c | 41 +++++++++++++++++++++++++++++----
drivers/gpu/drm/i915/i915_gem_gtt.c | 9 ++++++--
drivers/gpu/drm/i915/i915_gem_gtt.h | 9 ++++++++
drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +-
6 files changed, 64 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 849fc0018fdd..5688a8496392 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -872,6 +872,8 @@ struct intel_context {
} engine[I915_NUM_ENGINES];
struct list_head link;
+
+ bool closed:1;
};
enum fb_op_origin {
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 221a4b6237a5..933c3dd41fe9 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2587,12 +2587,15 @@ static int __i915_vma_unbind(struct i915_vma *vma, bool wait)
return ret;
}
- trace_i915_vma_unbind(vma);
-
- vma->vm->unbind_vma(vma);
+ if (likely(!vma->vm->closed)) {
+ trace_i915_vma_unbind(vma);
+ vma->vm->unbind_vma(vma);
+ }
vma->bound = 0;
- list_del_init(&vma->vm_link);
+ drm_mm_remove_node(&vma->node);
+ list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
+
if (vma->is_ggtt) {
if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
obj->map_and_fenceable = false;
@@ -2603,8 +2606,6 @@ static int __i915_vma_unbind(struct i915_vma *vma, bool wait)
vma->ggtt_view.pages = NULL;
}
- drm_mm_remove_node(&vma->node);
-
/* Since the unbound list is global, only move to that list if
* no more VMAs exist. */
if (--obj->bind_count == 0)
@@ -2851,7 +2852,7 @@ search_free:
goto err_remove_node;
list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
- list_add_tail(&vma->vm_link, &vm->inactive_list);
+ list_move_tail(&vma->vm_link, &vm->inactive_list);
obj->bind_count++;
return vma;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 9bbf6988fab1..02402fe78b63 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -153,6 +153,7 @@ void i915_gem_context_free(struct kref *ctx_ref)
struct intel_context *ctx = container_of(ctx_ref, typeof(*ctx), ref);
trace_i915_context_free(ctx);
+ GEM_BUG_ON(!ctx->closed);
if (i915.enable_execlists)
intel_lr_context_free(ctx);
@@ -211,6 +212,37 @@ i915_gem_alloc_context_obj(struct drm_device *dev, size_t size)
return obj;
}
+static void i915_ppgtt_close(struct i915_address_space *vm)
+{
+ struct list_head *phases[] = {
+ &vm->active_list,
+ &vm->inactive_list,
+ &vm->unbound_list,
+ NULL,
+ }, **phase;
+
+ GEM_BUG_ON(i915_is_ggtt(vm));
+ GEM_BUG_ON(vm->closed);
+ vm->closed = true;
+
+ for (phase = phases; *phase; phase++) {
+ struct i915_vma *vma, *vn;
+
+ list_for_each_entry_safe(vma, vn, *phase, vm_link)
+ if (!vma->closed)
+ i915_vma_close(vma);
+ }
+}
+
+static void context_close(struct intel_context *ctx)
+{
+ GEM_BUG_ON(ctx->closed);
+ ctx->closed = true;
+ if (ctx->ppgtt)
+ i915_ppgtt_close(&ctx->ppgtt->base);
+ i915_gem_context_unreference(ctx);
+}
+
static int assign_hw_id(struct drm_i915_private *dev_priv, unsigned *out)
{
int ret;
@@ -286,7 +318,7 @@ __create_hw_context(struct drm_device *dev,
return ctx;
err_out:
- i915_gem_context_unreference(ctx);
+ context_close(ctx);
return ERR_PTR(ret);
}
@@ -348,7 +380,7 @@ err_unpin:
i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state);
err_destroy:
idr_remove(&file_priv->context_idr, ctx->user_handle);
- i915_gem_context_unreference(ctx);
+ context_close(ctx);
return ERR_PTR(ret);
}
@@ -468,6 +500,7 @@ void i915_gem_context_fini(struct drm_device *dev)
}
}
+ dctx->closed = true;
i915_gem_context_unreference(dctx);
dev_priv->kernel_context = NULL;
}
@@ -476,7 +509,7 @@ static int context_idr_cleanup(int id, void *p, void *data)
{
struct intel_context *ctx = p;
- i915_gem_context_unreference(ctx);
+ context_close(ctx);
return 0;
}
@@ -952,7 +985,7 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
}
idr_remove(&ctx->file_priv->context_idr, ctx->user_handle);
- i915_gem_context_unreference(ctx);
+ context_close(ctx);
mutex_unlock(&dev->struct_mutex);
DRM_DEBUG_DRIVER("HW context %d destroyed\n", args->ctx_id);
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index e5cd84a54d08..dfd0333b2efd 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2125,6 +2125,7 @@ static void i915_address_space_init(struct i915_address_space *vm,
vm->dev = dev_priv->dev;
INIT_LIST_HEAD(&vm->active_list);
INIT_LIST_HEAD(&vm->inactive_list);
+ INIT_LIST_HEAD(&vm->unbound_list);
list_add_tail(&vm->global_link, &dev_priv->vm_list);
}
@@ -2217,9 +2218,10 @@ void i915_ppgtt_release(struct kref *kref)
trace_i915_ppgtt_release(&ppgtt->base);
- /* vmas should already be unbound */
+ /* vmas should already be unbound and destroyed */
WARN_ON(!list_empty(&ppgtt->base.active_list));
WARN_ON(!list_empty(&ppgtt->base.inactive_list));
+ WARN_ON(!list_empty(&ppgtt->base.unbound_list));
list_del(&ppgtt->base.global_link);
drm_mm_takedown(&ppgtt->base.mm);
@@ -3315,6 +3317,8 @@ __i915_gem_vma_create(struct drm_i915_gem_object *obj,
struct i915_vma *vma;
int i;
+ GEM_BUG_ON(vm->closed);
+
if (WARN_ON(i915_is_ggtt(vm) != !!ggtt_view))
return ERR_PTR(-EINVAL);
@@ -3322,11 +3326,11 @@ __i915_gem_vma_create(struct drm_i915_gem_object *obj,
if (vma == NULL)
return ERR_PTR(-ENOMEM);
- INIT_LIST_HEAD(&vma->vm_link);
INIT_LIST_HEAD(&vma->obj_link);
INIT_LIST_HEAD(&vma->exec_list);
for (i = 0; i < ARRAY_SIZE(vma->last_read); i++)
init_request_active(&vma->last_read[i], i915_vma_retire);
+ list_add(&vma->vm_link, &vm->unbound_list);
vma->vm = vm;
vma->obj = obj;
vma->is_ggtt = i915_is_ggtt(vm);
@@ -3366,6 +3370,7 @@ i915_gem_obj_lookup_or_create_ggtt_vma(struct drm_i915_gem_object *obj,
if (!vma)
vma = __i915_gem_vma_create(obj, &ggtt->base, view);
+ GEM_BUG_ON(vma->closed);
return vma;
}
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index bd254ada911c..f8bcc5ef3d07 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -309,6 +309,8 @@ struct i915_address_space {
u64 start; /* Start offset always 0 for dri2 */
u64 total; /* size addr space maps (ex. 2GB for ggtt) */
+ bool closed;
+
struct i915_page_scratch *scratch_page;
struct i915_page_table *scratch_pt;
struct i915_page_directory *scratch_pd;
@@ -337,6 +339,13 @@ struct i915_address_space {
*/
struct list_head inactive_list;
+ /**
+ * List of vma that have been unbound.
+ *
+ * A reference is not held on the buffer while on this list.
+ */
+ struct list_head unbound_list;
+
/* FIXME: Need a more generic return type */
gen6_pte_t (*pte_encode)(dma_addr_t addr,
enum i915_cache_level level,
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 5d699c1bb1ea..150a55938a02 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -701,7 +701,7 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
vma->bound |= GLOBAL_BIND;
__i915_vma_set_map_and_fenceable(vma);
- list_add_tail(&vma->vm_link, &ggtt->base.inactive_list);
+ list_move_tail(&vma->vm_link, &ggtt->base.inactive_list);
obj->bind_count++;
list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
--
2.8.0.rc3
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