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_put_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	uint32_t format;
 92
 93	pitch = args->width * ((args->bpp + 1) / 8);
 94	args->size = pitch * args->height;
 95	args->size = ALIGN(args->size, PAGE_SIZE);
 96
 97	ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
 98				    &args->handle);
 99	if (ret)
100		goto fail;
101
102	format = virtio_gpu_translate_format(DRM_FORMAT_XRGB8888);
103	virtio_gpu_resource_id_get(vgdev, &resid);
104	virtio_gpu_cmd_create_resource(vgdev, resid, format,
105				       args->width, args->height);
106
107	/* attach the object to the resource */
108	obj = gem_to_virtio_gpu_obj(gobj);
109	ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
110	if (ret)
111		goto fail;
112
113	obj->dumb = true;
114	args->pitch = pitch;
115	return ret;
116
117fail:
118	return ret;
119}
120
121int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
122			      struct drm_device *dev,
123			      uint32_t handle, uint64_t *offset_p)
124{
125	struct drm_gem_object *gobj;
126	struct virtio_gpu_object *obj;
127
128	BUG_ON(!offset_p);
129	gobj = drm_gem_object_lookup(file_priv, handle);
130	if (gobj == NULL)
131		return -ENOENT;
132	obj = gem_to_virtio_gpu_obj(gobj);
133	*offset_p = virtio_gpu_object_mmap_offset(obj);
134	drm_gem_object_put_unlocked(gobj);
135	return 0;
136}
137
138int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
139			       struct drm_file *file)
140{
141	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
142	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
143	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
144	int r;
145
146	if (!vgdev->has_virgl_3d)
147		return 0;
148
149	r = virtio_gpu_object_reserve(qobj, false);
150	if (r)
151		return r;
152
153	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
154					       qobj->hw_res_handle);
155	virtio_gpu_object_unreserve(qobj);
156	return 0;
157}
158
159void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
160				 struct drm_file *file)
161{
162	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
163	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
164	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
165	int r;
166
167	if (!vgdev->has_virgl_3d)
168		return;
169
170	r = virtio_gpu_object_reserve(qobj, false);
171	if (r)
172		return;
173
174	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
175						qobj->hw_res_handle);
176	virtio_gpu_object_unreserve(qobj);
177}