mdev_driver.c (ffb1e76f4f32d2b8ea4189df0484980370476395) mdev_driver.c (c68ea0d00ad82428154aed890ec9f793e460fa1c)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MDEV driver
4 *
5 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
6 * Author: Neo Jia <cjia@nvidia.com>
7 * Kirti Wankhede <kwankhede@nvidia.com>
8 */
9
10#include <linux/device.h>
11#include <linux/iommu.h>
12#include <linux/mdev.h>
13
14#include "mdev_private.h"
15
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MDEV driver
4 *
5 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
6 * Author: Neo Jia <cjia@nvidia.com>
7 * Kirti Wankhede <kwankhede@nvidia.com>
8 */
9
10#include <linux/device.h>
11#include <linux/iommu.h>
12#include <linux/mdev.h>
13
14#include "mdev_private.h"
15
16static int mdev_attach_iommu(struct mdev_device *mdev)
17{
18 int ret;
19 struct iommu_group *group;
20
21 group = iommu_group_alloc();
22 if (IS_ERR(group))
23 return PTR_ERR(group);
24
25 ret = iommu_group_add_device(group, &mdev->dev);
26 if (!ret)
27 dev_info(&mdev->dev, "MDEV: group_id = %d\n",
28 iommu_group_id(group));
29
30 iommu_group_put(group);
31 return ret;
32}
33
34static void mdev_detach_iommu(struct mdev_device *mdev)
35{
36 iommu_group_remove_device(&mdev->dev);
37 dev_info(&mdev->dev, "MDEV: detaching iommu\n");
38}
39
40static int mdev_probe(struct device *dev)
41{
42 struct mdev_driver *drv =
43 container_of(dev->driver, struct mdev_driver, driver);
16static int mdev_probe(struct device *dev)
17{
18 struct mdev_driver *drv =
19 container_of(dev->driver, struct mdev_driver, driver);
44 struct mdev_device *mdev = to_mdev_device(dev);
45 int ret;
46
20
47 ret = mdev_attach_iommu(mdev);
48 if (ret)
49 return ret;
50
51 if (drv->probe) {
52 ret = drv->probe(mdev);
53 if (ret)
54 mdev_detach_iommu(mdev);
55 }
56
57 return ret;
21 if (!drv->probe)
22 return 0;
23 return drv->probe(to_mdev_device(dev));
58}
59
60static void mdev_remove(struct device *dev)
61{
62 struct mdev_driver *drv =
63 container_of(dev->driver, struct mdev_driver, driver);
24}
25
26static void mdev_remove(struct device *dev)
27{
28 struct mdev_driver *drv =
29 container_of(dev->driver, struct mdev_driver, driver);
64 struct mdev_device *mdev = to_mdev_device(dev);
65
66 if (drv->remove)
30
31 if (drv->remove)
67 drv->remove(mdev);
68
69 mdev_detach_iommu(mdev);
32 drv->remove(to_mdev_device(dev));
70}
71
72static int mdev_match(struct device *dev, struct device_driver *drv)
73{
74 /*
75 * No drivers automatically match. Drivers are only bound by explicit
76 * device_driver_attach()
77 */

--- 46 unchanged lines hidden --- 		33}
34
35static int mdev_match(struct device *dev, struct device_driver *drv)
36{
37 /*
38 * No drivers automatically match. Drivers are only bound by explicit
39 * device_driver_attach()
40 */

--- 46 unchanged lines hidden ---