[thirdparty/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/drm_file.h>
#include <drm/drm_fourcc.h>

#include "virtgpu_drv.h"

int virtio_gpu_gem_create(struct drm_file *file,
			  struct drm_device *dev,
			  struct virtio_gpu_object_params *params,
			  struct drm_gem_object **obj_p,
			  uint32_t *handle_p)
{
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_object *obj;
	int ret;
	u32 handle;

	if (vgdev->has_virgl_3d)
		virtio_gpu_create_context(dev, file);

	ret = virtio_gpu_object_create(vgdev, params, &obj, NULL);
	if (ret < 0)
		return ret;

	ret = drm_gem_handle_create(file, &obj->base.base, &handle);
	if (ret) {
		drm_gem_object_release(&obj->base.base);
		return ret;
	}

	*obj_p = &obj->base.base;

	/* drop reference from allocate - handle holds it now */
	drm_gem_object_put_unlocked(&obj->base.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 drm_gem_object *gobj;
	struct virtio_gpu_object_params params = { 0 };
	int ret;
	uint32_t pitch;

	if (args->bpp != 32)
		return -EINVAL;

	pitch = args->width * 4;
	args->size = pitch * args->height;
	args->size = ALIGN(args->size, PAGE_SIZE);

	params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
	params.width = args->width;
	params.height = args->height;
	params.size = args->size;
	params.dumb = true;
	ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,
				    &args->handle);
	if (ret)
		goto fail;

	args->pitch = pitch;
	return ret;

fail:
	return ret;
}

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;

	BUG_ON(!offset_p);
	gobj = drm_gem_object_lookup(file_priv, handle);
	if (gobj == NULL)
		return -ENOENT;
	*offset_p = drm_vma_node_offset_addr(&gobj->vma_node);
	drm_gem_object_put_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_array *objs;

	if (!vgdev->has_virgl_3d)
		return 0;

	objs = virtio_gpu_array_alloc(1);
	if (!objs)
		return -ENOMEM;
	virtio_gpu_array_add_obj(objs, obj);

	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
					       objs);
	virtio_gpu_notify(vgdev);
	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_array *objs;

	if (!vgdev->has_virgl_3d)
		return;

	objs = virtio_gpu_array_alloc(1);
	if (!objs)
		return;
	virtio_gpu_array_add_obj(objs, obj);

	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
					       objs);
	virtio_gpu_notify(vgdev);
}

struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
{
	struct virtio_gpu_object_array *objs;
	size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents;

	objs = kmalloc(size, GFP_KERNEL);
	if (!objs)
		return NULL;

	objs->nents = 0;
	objs->total = nents;
	return objs;
}

static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
{
	kfree(objs);
}

struct virtio_gpu_object_array*
virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
{
	struct virtio_gpu_object_array *objs;
	u32 i;

	objs = virtio_gpu_array_alloc(nents);
	if (!objs)
		return NULL;

	for (i = 0; i < nents; i++) {
		objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
		if (!objs->objs[i]) {
			objs->nents = i;
			virtio_gpu_array_put_free(objs);
			return NULL;
		}
	}
	objs->nents = i;
	return objs;
}

void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
			      struct drm_gem_object *obj)
{
	if (WARN_ON_ONCE(objs->nents == objs->total))
		return;

	drm_gem_object_get(obj);
	objs->objs[objs->nents] = obj;
	objs->nents++;
}

int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
{
	int ret;

	if (objs->nents == 1) {
		ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
	} else {
		ret = drm_gem_lock_reservations(objs->objs, objs->nents,
						&objs->ticket);
	}
	return ret;
}

void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
{
	if (objs->nents == 1) {
		dma_resv_unlock(objs->objs[0]->resv);
	} else {
		drm_gem_unlock_reservations(objs->objs, objs->nents,
					    &objs->ticket);
	}
}

void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
				struct dma_fence *fence)
{
	int i;

	for (i = 0; i < objs->nents; i++)
		dma_resv_add_excl_fence(objs->objs[i]->resv, fence);
}

void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
{
	u32 i;

	for (i = 0; i < objs->nents; i++)
		drm_gem_object_put_unlocked(objs->objs[i]);
	virtio_gpu_array_free(objs);
}

void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
				       struct virtio_gpu_object_array *objs)
{
	spin_lock(&vgdev->obj_free_lock);
	list_add_tail(&objs->next, &vgdev->obj_free_list);
	spin_unlock(&vgdev->obj_free_lock);
	schedule_work(&vgdev->obj_free_work);
}

void virtio_gpu_array_put_free_work(struct work_struct *work)
{
	struct virtio_gpu_device *vgdev =
		container_of(work, struct virtio_gpu_device, obj_free_work);
	struct virtio_gpu_object_array *objs;

	spin_lock(&vgdev->obj_free_lock);
	while (!list_empty(&vgdev->obj_free_list)) {
		objs = list_first_entry(&vgdev->obj_free_list,
					struct virtio_gpu_object_array, next);
		list_del(&objs->next);
		spin_unlock(&vgdev->obj_free_lock);
		virtio_gpu_array_put_free(objs);
		spin_lock(&vgdev->obj_free_lock);
	}
	spin_unlock(&vgdev->obj_free_lock);
}
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
a3d63977 SR	26	#include <drm/drm_file.h>
	27	#include <drm/drm_fourcc.h>
	28
dc5698e8 DA	29	#include "virtgpu_drv.h"
dc5698e8 DA	30
dc5698e8 DA	31	int virtio_gpu_gem_create(struct drm_file *file,
dc5698e8 DA	32	struct drm_device *dev,
4441235f	33	struct virtio_gpu_object_params *params,
dc5698e8 DA	34	struct drm_gem_object **obj_p,
	35	uint32_t *handle_p)
	36	{
2e0d9ee4	37	struct virtio_gpu_device *vgdev = dev->dev_private;
dc5698e8 DA	38	struct virtio_gpu_object *obj;
	39	int ret;
	40	u32 handle;
	41
c3e2850a GS	42	if (vgdev->has_virgl_3d)
	43	virtio_gpu_create_context(dev, file);
	44
2e0d9ee4 GH	45	ret = virtio_gpu_object_create(vgdev, params, &obj, NULL);
	46	if (ret < 0)
	47	return ret;
dc5698e8	48
c66df701	49	ret = drm_gem_handle_create(file, &obj->base.base, &handle);
dc5698e8	50	if (ret) {
c66df701	51	drm_gem_object_release(&obj->base.base);
dc5698e8 DA	52	return ret;
	53	}
	54
c66df701	55	*obj_p = &obj->base.base;
dc5698e8 DA	56
dc5698e8 DA	57	/* drop reference from allocate - handle holds it now */
c66df701	58	drm_gem_object_put_unlocked(&obj->base.base);
dc5698e8 DA	59
	60	*handle_p = handle;
	61	return 0;
	62	}
	63
	64	int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
	65	struct drm_device *dev,
	66	struct drm_mode_create_dumb *args)
	67	{
dc5698e8	68	struct drm_gem_object *gobj;
4441235f	69	struct virtio_gpu_object_params params = { 0 };
dc5698e8 DA	70	int ret;
dc5698e8 DA	71	uint32_t pitch;
dc5698e8	72
42fd9e6c GH	73	if (args->bpp != 32)
	74	return -EINVAL;
	75
	76	pitch = args->width * 4;
dc5698e8 DA	77	args->size = pitch * args->height;
	78	args->size = ALIGN(args->size, PAGE_SIZE);
	79
f9659329 GH	80	params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
	81	params.width = args->width;
	82	params.height = args->height;
4441235f	83	params.size = args->size;
530b2842	84	params.dumb = true;
4441235f	85	ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,
dc5698e8 DA	86	&args->handle);
	87	if (ret)
	88	goto fail;
	89
dc5698e8 DA	90	args->pitch = pitch;
	91	return ret;
	92
	93	fail:
	94	return ret;
	95	}
	96
dc5698e8 DA	97	int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
	98	struct drm_device *dev,
	99	uint32_t handle, uint64_t *offset_p)
	100	{
	101	struct drm_gem_object *gobj;
9d492b6b	102
dc5698e8	103	BUG_ON(!offset_p);
a8ad0bd8	104	gobj = drm_gem_object_lookup(file_priv, handle);
dc5698e8 DA	105	if (gobj == NULL)
dc5698e8 DA	106	return -ENOENT;
093bd9cf	107	*offset_p = drm_vma_node_offset_addr(&gobj->vma_node);
1af0838d	108	drm_gem_object_put_unlocked(gobj);
dc5698e8 DA	109	return 0;
dc5698e8 DA	110	}
62fb7a5e GH	111
	112	int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
	113	struct drm_file *file)
	114	{
	115	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
	116	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
93c38d15	117	struct virtio_gpu_object_array *objs;
62fb7a5e GH	118
	119	if (!vgdev->has_virgl_3d)
	120	return 0;
	121
93c38d15 GH	122	objs = virtio_gpu_array_alloc(1);
	123	if (!objs)
	124	return -ENOMEM;
	125	virtio_gpu_array_add_obj(objs, obj);
62fb7a5e GH	126
62fb7a5e GH	127	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
93c38d15	128	objs);
97452907	129	virtio_gpu_notify(vgdev);
62fb7a5e GH	130	return 0;
	131	}
	132
	133	void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
	134	struct drm_file *file)
	135	{
	136	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
	137	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
93c38d15	138	struct virtio_gpu_object_array *objs;
62fb7a5e GH	139
	140	if (!vgdev->has_virgl_3d)
	141	return;
	142
93c38d15 GH	143	objs = virtio_gpu_array_alloc(1);
93c38d15 GH	144	if (!objs)
62fb7a5e	145	return;
93c38d15	146	virtio_gpu_array_add_obj(objs, obj);
62fb7a5e GH	147
62fb7a5e GH	148	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
93c38d15	149	objs);
97452907	150	virtio_gpu_notify(vgdev);
62fb7a5e	151	}
98abe21d GH	152
	153	struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
	154	{
	155	struct virtio_gpu_object_array *objs;
	156	size_t size = sizeof(objs) + sizeof(objs->objs[0]) nents;
	157
	158	objs = kmalloc(size, GFP_KERNEL);
	159	if (!objs)
	160	return NULL;
	161
	162	objs->nents = 0;
	163	objs->total = nents;
	164	return objs;
	165	}
	166
	167	static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
	168	{
	169	kfree(objs);
	170	}
	171
	172	struct virtio_gpu_object_array*
	173	virtio_gpu_array_from_handles(struct drm_file drm_file, u32 handles, u32 nents)
	174	{
	175	struct virtio_gpu_object_array *objs;
	176	u32 i;
	177
	178	objs = virtio_gpu_array_alloc(nents);
	179	if (!objs)
	180	return NULL;
	181
	182	for (i = 0; i < nents; i++) {
	183	objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
	184	if (!objs->objs[i]) {
	185	objs->nents = i;
	186	virtio_gpu_array_put_free(objs);
	187	return NULL;
	188	}
	189	}
	190	objs->nents = i;
	191	return objs;
	192	}
	193
	194	void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
	195	struct drm_gem_object *obj)
	196	{
	197	if (WARN_ON_ONCE(objs->nents == objs->total))
	198	return;
	199
	200	drm_gem_object_get(obj);
	201	objs->objs[objs->nents] = obj;
	202	objs->nents++;
	203	}
	204
	205	int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
	206	{
	207	int ret;
	208
	209	if (objs->nents == 1) {
	210	ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
	211	} else {
	212	ret = drm_gem_lock_reservations(objs->objs, objs->nents,
	213	&objs->ticket);
	214	}
	215	return ret;
216	}
217
218	void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
219	{
220	if (objs->nents == 1) {
221	dma_resv_unlock(objs->objs[0]->resv);
222	} else {
223	drm_gem_unlock_reservations(objs->objs, objs->nents,
224	&objs->ticket);
225	}
226	}
227
228	void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
229	struct dma_fence *fence)
230	{
231	int i;
232
233	for (i = 0; i < objs->nents; i++)
234	dma_resv_add_excl_fence(objs->objs[i]->resv, fence);
235	}
236
237	void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
238	{
239	u32 i;
240
241	for (i = 0; i < objs->nents; i++)
242	drm_gem_object_put_unlocked(objs->objs[i]);
243	virtio_gpu_array_free(objs);
244	}
f0c6cef7 GH	245
	246	void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
	247	struct virtio_gpu_object_array *objs)
	248	{
	249	spin_lock(&vgdev->obj_free_lock);
	250	list_add_tail(&objs->next, &vgdev->obj_free_list);
	251	spin_unlock(&vgdev->obj_free_lock);
	252	schedule_work(&vgdev->obj_free_work);
	253	}
	254
	255	void virtio_gpu_array_put_free_work(struct work_struct *work)
	256	{
	257	struct virtio_gpu_device *vgdev =
	258	container_of(work, struct virtio_gpu_device, obj_free_work);
	259	struct virtio_gpu_object_array *objs;
	260
	261	spin_lock(&vgdev->obj_free_lock);
	262	while (!list_empty(&vgdev->obj_free_list)) {
	263	objs = list_first_entry(&vgdev->obj_free_list,
	264	struct virtio_gpu_object_array, next);
	265	list_del(&objs->next);
	266	spin_unlock(&vgdev->obj_free_lock);
	267	virtio_gpu_array_put_free(objs);
	268	spin_lock(&vgdev->obj_free_lock);
	269	}
	270	spin_unlock(&vgdev->obj_free_lock);
	271	}