@@ -1809,9 +1809,13 @@ int i915_gem_vm_create_ioctl(struct drm_device *dev, void *data,
if (!HAS_FULL_PPGTT(i915))
return -ENODEV;
- if (args->flags)
+ if (args->flags & I915_VM_CREATE_FLAGS_UNKNOWN)
return -EINVAL;
+ if ((args->flags & I915_VM_CREATE_FLAGS_USE_VM_BIND) &&
+ !HAS_VM_BIND(i915))
+ return -EOPNOTSUPP;
+
ppgtt = i915_ppgtt_create(to_gt(i915), 0);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
@@ -1824,15 +1828,32 @@ int i915_gem_vm_create_ioctl(struct drm_device *dev, void *data,
goto err_put;
}
+ if (args->flags & I915_VM_CREATE_FLAGS_USE_VM_BIND) {
+ struct drm_i915_gem_object *obj;
+
+ obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto err_put;
+ }
+
+ ppgtt->vm.root_obj = obj;
+ }
+
err = xa_alloc(&file_priv->vm_xa, &id, &ppgtt->vm,
xa_limit_32b, GFP_KERNEL);
if (err)
- goto err_put;
+ goto err_root_obj_put;
GEM_BUG_ON(id == 0); /* reserved for invalid/unassigned ppgtt */
args->vm_id = id;
return 0;
+err_root_obj_put:
+ if (ppgtt->vm.root_obj) {
+ i915_gem_object_put(ppgtt->vm.root_obj);
+ ppgtt->vm.root_obj = NULL;
+ }
err_put:
i915_vm_put(&ppgtt->vm);
return err;
@@ -150,8 +150,7 @@ int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
*/
static inline bool i915_gem_vm_is_vm_bind_mode(struct i915_address_space *vm)
{
- /* No support to enable vm_bind mode yet */
- return false;
+ return !!vm->root_obj;
}
struct i915_address_space *
@@ -178,6 +178,8 @@ int i915_vm_lock_objects(struct i915_address_space *vm,
void i915_address_space_fini(struct i915_address_space *vm)
{
drm_mm_takedown(&vm->mm);
+ if (vm->root_obj)
+ i915_gem_object_put(vm->root_obj);
GEM_BUG_ON(!RB_EMPTY_ROOT(&vm->va.rb_root));
mutex_destroy(&vm->vm_bind_lock);
}
@@ -978,6 +978,8 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
#define HAS_LMEMBAR_SMEM_STOLEN(i915) (!HAS_LMEM(i915) && \
GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
+#define HAS_VM_BIND(i915) (GRAPHICS_VER(i915) >= 12)
+
/* intel_device_info.c */
static inline struct intel_device_info *
mkwrite_device_info(struct drm_i915_private *dev_priv)
@@ -178,6 +178,9 @@ int i915_getparam_ioctl(struct drm_device *dev, void *data,
case I915_PARAM_OA_TIMESTAMP_FREQUENCY:
value = i915_perf_oa_timestamp_frequency(i915);
break;
+ case I915_PARAM_VM_BIND_VERSION:
+ value = HAS_VM_BIND(i915);
+ break;
default:
DRM_DEBUG("Unknown parameter %d\n", param->param);
return -EINVAL;
@@ -777,6 +777,22 @@ typedef struct drm_i915_irq_wait {
*/
#define I915_PARAM_OA_TIMESTAMP_FREQUENCY 57
+/*
+ * VM_BIND feature version supported.
+ *
+ * The following versions of VM_BIND have been defined:
+ *
+ * 0: No VM_BIND support.
+ *
+ * 1: In VM_UNBIND calls, the UMD must specify the exact mappings created
+ * previously with VM_BIND, the ioctl will not support unbinding multiple
+ * mappings or splitting them. Similarly, VM_BIND calls will not replace
+ * any existing mappings.
+ *
+ * See struct drm_i915_gem_vm_bind and struct drm_i915_gem_vm_unbind.
+ */
+#define I915_PARAM_VM_BIND_VERSION 58
+
/* Must be kept compact -- no holes and well documented */
/**
@@ -2644,7 +2660,15 @@ struct drm_i915_gem_vm_control {
/** @extensions: Zero-terminated chain of extensions. */
__u64 extensions;
- /** @flags: reserved for future usage, currently MBZ */
+ /**
+ * @flags: Supported flags are,
+ *
+ * I915_VM_CREATE_FLAGS_USE_VM_BIND:
+ *
+ * VM created will work in VM_BIND mode.
+ */
+#define I915_VM_CREATE_FLAGS_USE_VM_BIND (1u << 0)
+#define I915_VM_CREATE_FLAGS_UNKNOWN (-(I915_VM_CREATE_FLAGS_USE_VM_BIND << 1))
__u32 flags;
/** @vm_id: Id of the VM created or to be destroyed */