[deliverable/linux.git] / drivers / gpu / drm / virtio / virtgpu_gem.c

/*
 * 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(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;
}

int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
			       struct drm_file *file)
{
	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
	int r;

	if (!vgdev->has_virgl_3d)
		return 0;

	r = virtio_gpu_object_reserve(qobj, false);
	if (r)
		return r;

	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
					       qobj->hw_res_handle);
	virtio_gpu_object_unreserve(qobj);
	return 0;
}

void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
				 struct drm_file *file)
{
	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
	int r;

	if (!vgdev->has_virgl_3d)
		return;

	r = virtio_gpu_object_reserve(qobj, false);
	if (r)
		return;

	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
						qobj->hw_res_handle);
	virtio_gpu_object_unreserve(qobj);
}
Commit	Line	Data
dc5698e8 DA	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
	29	void 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
	37	struct 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
	52	int 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
81	int 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
115	fail:
116	return ret;
117	}
118
119	int 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
126	int 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);
a8ad0bd8	133	gobj = drm_gem_object_lookup(file_priv, handle);
dc5698e8 DA	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	}
62fb7a5e GH	141
	142	int 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
	163	void 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	}