| 1 | |
| 2 | |
| 3 | * MDEV driver
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| 4 | *
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| 5 | * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
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| 6 | * Author: Neo Jia <[email protected]>
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| 7 | * Kirti Wankhede <[email protected]>
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| 8 |
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| 9 |
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| 10 | #include <linux/iommu.h>
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| 11 | #include <linux/mdev.h>
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| 12 |
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| 13 | #include "mdev_private.h"
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| 14 |
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| 15 | static int mdev_probe(struct device *dev)
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| 16 | {
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| 17 | struct mdev_driver *drv =
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| 18 | container_of(dev->driver, struct mdev_driver, driver);
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| 19 |
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| 20 | if (!drv->probe)
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| 21 | return 0;
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| 22 | return drv->probe(to_mdev_device(dev));
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| 23 | }
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| 24 |
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| 25 | static void mdev_remove(struct device *dev)
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| 26 | {
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| 27 | struct mdev_driver *drv =
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| 28 | container_of(dev->driver, struct mdev_driver, driver);
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| 29 |
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| 30 | if (drv->remove)
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| 31 | drv->remove(to_mdev_device(dev));
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| 32 | }
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| 33 |
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| 34 | static int mdev_match(struct device *dev, const struct device_driver *drv)
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| 35 | {
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| 36 | |
| 37 | * No drivers automatically match. Drivers are only bound by explicit
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| 38 | * device_driver_attach()
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| 39 |
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| 40 | return 0;
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| 41 | }
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| 42 |
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| 43 | const struct bus_type mdev_bus_type = {
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| 44 | .name = "mdev",
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| 45 | .probe = mdev_probe,
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| 46 | .remove = mdev_remove,
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| 47 | .match = mdev_match,
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| 48 | };
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| 49 |
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| 50 | |
| 51 | * mdev_register_driver - register a new MDEV driver
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| 52 | * @drv: the driver to register
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| 53 | *
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| 54 | * Returns a negative value on error, otherwise 0.
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| 55 | *
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| 56 | int mdev_register_driver(struct mdev_driver *drv)
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| 57 | {
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| 58 | if (!drv->device_api)
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| 59 | return -EINVAL;
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| 60 |
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| 61 |
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| 62 | drv->driver.bus = &mdev_bus_type;
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| 63 | return driver_register(&drv->driver);
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| 64 | }
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| 65 | EXPORT_SYMBOL(mdev_register_driver);
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| 66 |
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| 67 | |
| 68 | * mdev_unregister_driver - unregister MDEV driver
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| 69 | * @drv: the driver to unregister
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| 70 |
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| 71 | void mdev_unregister_driver(struct mdev_driver *drv)
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| 72 | {
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| 73 | driver_unregister(&drv->driver);
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| 74 | }
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| 75 | EXPORT_SYMBOL(mdev_unregister_driver);
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