-int
-i915_gem_pin_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file)
-{
- struct drm_i915_gem_pin *args = data;
- struct drm_i915_gem_object *obj;
- int ret;
-
- if (drm_core_check_feature(dev, DRIVER_MODESET))
- return -ENODEV;
-
- ret = i915_mutex_lock_interruptible(dev);
- if (ret)
- return ret;
-
- obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
- if (&obj->base == NULL) {
- ret = -ENOENT;
- goto unlock;
- }
-
- if (obj->madv != I915_MADV_WILLNEED) {
- DRM_DEBUG("Attempting to pin a purgeable buffer\n");
- ret = -EFAULT;
- goto out;
- }
-
- if (obj->pin_filp != NULL && obj->pin_filp != file) {
- DRM_DEBUG("Already pinned in i915_gem_pin_ioctl(): %d\n",
- args->handle);
- ret = -EINVAL;
- goto out;
- }
-
- if (obj->user_pin_count == ULONG_MAX) {
- ret = -EBUSY;
- goto out;
- }
-
- if (obj->user_pin_count == 0) {
- ret = i915_gem_obj_ggtt_pin(obj, args->alignment, PIN_MAPPABLE);
- if (ret)
- goto out;
- }
-
- obj->user_pin_count++;
- obj->pin_filp = file;
-
- args->offset = i915_gem_obj_ggtt_offset(obj);
-out:
- drm_gem_object_unreference(&obj->base);
-unlock:
- mutex_unlock(&dev->struct_mutex);
- return ret;
-}
-
-int
-i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file)
-{
- struct drm_i915_gem_pin *args = data;
- struct drm_i915_gem_object *obj;
- int ret;
-
- if (drm_core_check_feature(dev, DRIVER_MODESET))
- return -ENODEV;
-
- ret = i915_mutex_lock_interruptible(dev);
- if (ret)
- return ret;
-
- obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
- if (&obj->base == NULL) {
- ret = -ENOENT;
- goto unlock;
- }
-
- if (obj->pin_filp != file) {
- DRM_DEBUG("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
- args->handle);
- ret = -EINVAL;
- goto out;
- }
- obj->user_pin_count--;
- if (obj->user_pin_count == 0) {
- obj->pin_filp = NULL;
- i915_gem_object_ggtt_unpin(obj);
- }
-
-out:
- drm_gem_object_unreference(&obj->base);
-unlock:
- mutex_unlock(&dev->struct_mutex);
- return ret;
-}
-