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/drmP.h>
 27#include "virtgpu_drv.h"
 28
 29void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
 30{
 31	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj);
 32
 33	if (obj)
 34		virtio_gpu_object_unref(&obj);
 35}
 36
 37struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
 38						  size_t size, bool kernel,
 39						  bool pinned)
 40{
 41	struct virtio_gpu_device *vgdev = dev->dev_private;
 42	struct virtio_gpu_object *obj;
 43	int ret;
 44
 45	ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj);
 46	if (ret)
 47		return ERR_PTR(ret);
 48
 49	return obj;
 50}
 51
 52int virtio_gpu_gem_create(struct drm_file *file,
 53			  struct drm_device *dev,
 54			  uint64_t size,
 55			  struct drm_gem_object **obj_p,
 56			  uint32_t *handle_p)
 57{
 58	struct virtio_gpu_object *obj;
 59	int ret;
 60	u32 handle;
 61
 62	obj = virtio_gpu_alloc_object(dev, size, false, false);
 63	if (IS_ERR(obj))
 64		return PTR_ERR(obj);
 65
 66	ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
 67	if (ret) {
 68		drm_gem_object_release(&obj->gem_base);
 69		return ret;
 70	}
 71
 72	*obj_p = &obj->gem_base;
 73
 74	/* drop reference from allocate - handle holds it now */
 75	drm_gem_object_unreference_unlocked(&obj->gem_base);
 76
 77	*handle_p = handle;
 78	return 0;
 79}
 80
 81int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
 82				struct drm_device *dev,
 83				struct drm_mode_create_dumb *args)
 84{
 85	struct virtio_gpu_device *vgdev = dev->dev_private;
 86	struct drm_gem_object *gobj;
 87	struct virtio_gpu_object *obj;
 88	int ret;
 89	uint32_t pitch;
 90	uint32_t resid;
 91
 92	pitch = args->width * ((args->bpp + 1) / 8);
 93	args->size = pitch * args->height;
 94	args->size = ALIGN(args->size, PAGE_SIZE);
 95
 96	ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
 97				    &args->handle);
 98	if (ret)
 99		goto fail;
100
101	virtio_gpu_resource_id_get(vgdev, &resid);
102	virtio_gpu_cmd_create_resource(vgdev, resid,
103				       2, args->width, args->height);
104
105	/* attach the object to the resource */
106	obj = gem_to_virtio_gpu_obj(gobj);
107	ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
108	if (ret)
109		goto fail;
110
111	obj->dumb = true;
112	args->pitch = pitch;
113	return ret;
114
115fail:
116	return ret;
117}
118
119int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
120				 struct drm_device *dev,
121				 uint32_t handle)
122{
123	return drm_gem_handle_delete(file_priv, handle);
124}
125
126int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
127			      struct drm_device *dev,
128			      uint32_t handle, uint64_t *offset_p)
129{
130	struct drm_gem_object *gobj;
131	struct virtio_gpu_object *obj;
132	BUG_ON(!offset_p);
133	gobj = drm_gem_object_lookup(dev, file_priv, handle);
134	if (gobj == NULL)
135		return -ENOENT;
136	obj = gem_to_virtio_gpu_obj(gobj);
137	*offset_p = virtio_gpu_object_mmap_offset(obj);
138	drm_gem_object_unreference_unlocked(gobj);
139	return 0;
140}
141
142int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
143			       struct drm_file *file)
144{
145	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
146	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
147	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
148	int r;
149
150	if (!vgdev->has_virgl_3d)
151		return 0;
152
153	r = virtio_gpu_object_reserve(qobj, false);
154	if (r)
155		return r;
156
157	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
158					       qobj->hw_res_handle);
159	virtio_gpu_object_unreserve(qobj);
160	return 0;
161}
162
163void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
164				 struct drm_file *file)
165{
166	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
167	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
168	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
169	int r;
170
171	if (!vgdev->has_virgl_3d)
172		return;
173
174	r = virtio_gpu_object_reserve(qobj, false);
175	if (r)
176		return;
177
178	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
179						qobj->hw_res_handle);
180	virtio_gpu_object_unreserve(qobj);
181}