1/*
  2 * Copyright (C) 2015 Red Hat, Inc.
  3 * All Rights Reserved.
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining
  6 * a copy of this software and associated documentation files (the
  7 * "Software"), to deal in the Software without restriction, including
  8 * without limitation the rights to use, copy, modify, merge, publish,
  9 * distribute, sublicense, and/or sell copies of the Software, and to
 10 * permit persons to whom the Software is furnished to do so, subject to
 11 * the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the
 14 * next paragraph) shall be included in all copies or substantial
 15 * portions of the Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 24 */
 25
 26#include <drm/drm_file.h>
 27#include <drm/drm_fourcc.h>
 28
 29#include "virtgpu_drv.h"
 30
 31void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
 32{
 33	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj);
 34
 35	if (obj)
 36		virtio_gpu_object_unref(&obj);
 37}
 38
 39struct virtio_gpu_object*
 40virtio_gpu_alloc_object(struct drm_device *dev,
 41			struct virtio_gpu_object_params *params,
 42			struct virtio_gpu_fence *fence)
 43{
 44	struct virtio_gpu_device *vgdev = dev->dev_private;
 45	struct virtio_gpu_object *obj;
 46	int ret;
 47
 48	ret = virtio_gpu_object_create(vgdev, params, &obj, fence);
 49	if (ret)
 50		return ERR_PTR(ret);
 51
 52	return obj;
 53}
 54
 55int virtio_gpu_gem_create(struct drm_file *file,
 56			  struct drm_device *dev,
 57			  struct virtio_gpu_object_params *params,
 58			  struct drm_gem_object **obj_p,
 59			  uint32_t *handle_p)
 60{
 61	struct virtio_gpu_object *obj;
 62	int ret;
 63	u32 handle;
 64
 65	obj = virtio_gpu_alloc_object(dev, params, NULL);
 66	if (IS_ERR(obj))
 67		return PTR_ERR(obj);
 68
 69	ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
 70	if (ret) {
 71		drm_gem_object_release(&obj->gem_base);
 72		return ret;
 73	}
 74
 75	*obj_p = &obj->gem_base;
 76
 77	/* drop reference from allocate - handle holds it now */
 78	drm_gem_object_put_unlocked(&obj->gem_base);
 79
 80	*handle_p = handle;
 81	return 0;
 82}
 83
 84int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
 85				struct drm_device *dev,
 86				struct drm_mode_create_dumb *args)
 87{
 88	struct drm_gem_object *gobj;
 89	struct virtio_gpu_object_params params = { 0 };
 90	int ret;
 91	uint32_t pitch;
 92
 93	if (args->bpp != 32)
 94		return -EINVAL;
 95
 96	pitch = args->width * 4;
 97	args->size = pitch * args->height;
 98	args->size = ALIGN(args->size, PAGE_SIZE);
 99
100	params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
101	params.width = args->width;
102	params.height = args->height;
103	params.size = args->size;
104	params.dumb = true;
105	ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,
106				    &args->handle);
107	if (ret)
108		goto fail;
109
110	args->pitch = pitch;
111	return ret;
112
113fail:
114	return ret;
115}
116
117int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
118			      struct drm_device *dev,
119			      uint32_t handle, uint64_t *offset_p)
120{
121	struct drm_gem_object *gobj;
122	struct virtio_gpu_object *obj;
123
124	BUG_ON(!offset_p);
125	gobj = drm_gem_object_lookup(file_priv, handle);
126	if (gobj == NULL)
127		return -ENOENT;
128	obj = gem_to_virtio_gpu_obj(gobj);
129	*offset_p = virtio_gpu_object_mmap_offset(obj);
130	drm_gem_object_put_unlocked(gobj);
131	return 0;
132}
133
134int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
135			       struct drm_file *file)
136{
137	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
138	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
139	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
140	int r;
141
142	if (!vgdev->has_virgl_3d)
143		return 0;
144
145	r = virtio_gpu_object_reserve(qobj, false);
146	if (r)
147		return r;
148
149	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
150					       qobj->hw_res_handle);
151	virtio_gpu_object_unreserve(qobj);
152	return 0;
153}
154
155void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
156				 struct drm_file *file)
157{
158	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
159	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
160	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
161	int r;
162
163	if (!vgdev->has_virgl_3d)
164		return;
165
166	r = virtio_gpu_object_reserve(qobj, false);
167	if (r)
168		return;
169
170	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
171						qobj->hw_res_handle);
172	virtio_gpu_object_unreserve(qobj);
173}