1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c
new file mode 100644
index 000000000000..cfa0d27150bd
--- /dev/null
+++ b/drivers/gpu/drm/virtio/virtgpu_gem.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <drm/drmP.h>
+#include "virtgpu_drv.h"
+
+void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
+{
+        struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj);
+
+        if (obj)
+                virtio_gpu_object_unref(&obj);
+}
+
+struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
+                                                  size_t size, bool kernel,
+                                                  bool pinned)
+{
+        struct virtio_gpu_device *vgdev = dev->dev_private;
+        struct virtio_gpu_object *obj;
+        int ret;
+
+        ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj);
+        if (ret)
+                return ERR_PTR(ret);
+
+        return obj;
+}
+
+int virtio_gpu_gem_create(struct drm_file *file,
+                          struct drm_device *dev,
+                          uint64_t size,
+                          struct drm_gem_object **obj_p,
+                          uint32_t *handle_p)
+{
+        struct virtio_gpu_object *obj;
+        int ret;
+        u32 handle;
+
+        obj = virtio_gpu_alloc_object(dev, size, false, false);
+        if (IS_ERR(obj))
+                return PTR_ERR(obj);
+
+        ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
+        if (ret) {
+                drm_gem_object_release(&obj->gem_base);
+                return ret;
+        }
+
+        *obj_p = &obj->gem_base;
+
+        /* drop reference from allocate - handle holds it now */
+        drm_gem_object_unreference_unlocked(&obj->gem_base);
+
+        *handle_p = handle;
+        return 0;
+}
+
+int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
+                                struct drm_device *dev,
+                                struct drm_mode_create_dumb *args)
+{
+        struct virtio_gpu_device *vgdev = dev->dev_private;
+        struct drm_gem_object *gobj;
+        struct virtio_gpu_object *obj;
+        int ret;
+        uint32_t pitch;
+        uint32_t resid;
+
+        pitch = args->width * ((args->bpp + 1) / 8);
+        args->size = pitch * args->height;
+        args->size = ALIGN(args->size, PAGE_SIZE);
+
+        ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
+                                    &args->handle);
+        if (ret)
+                goto fail;
+
+        virtio_gpu_resource_id_get(vgdev, &resid);
+        virtio_gpu_cmd_create_resource(vgdev, resid,
+                                       2, args->width, args->height);
+
+        /* attach the object to the resource */
+        obj = gem_to_virtio_gpu_obj(gobj);
+        ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
+        if (ret)
+                goto fail;
+
+        obj->dumb = true;
+        args->pitch = pitch;
+        return ret;
+
+fail:
+        return ret;
+}
+
+int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
+                                 struct drm_device *dev,
+                                 uint32_t handle)
+{
+        return drm_gem_handle_delete(file_priv, handle);
+}
+
+int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
+                              struct drm_device *dev,
+                              uint32_t handle, uint64_t *offset_p)
+{
+        struct drm_gem_object *gobj;
+        struct virtio_gpu_object *obj;
+        BUG_ON(!offset_p);
+        gobj = drm_gem_object_lookup(dev, file_priv, handle);
+        if (gobj == NULL)
+                return -ENOENT;
+        obj = gem_to_virtio_gpu_obj(gobj);
+        *offset_p = virtio_gpu_object_mmap_offset(obj);
+        drm_gem_object_unreference_unlocked(gobj);
+        return 0;
+}