diff options
Diffstat (limited to 'drivers/vfio/mdev/vfio_mdev.c')
-rw-r--r-- | drivers/vfio/mdev/vfio_mdev.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/drivers/vfio/mdev/vfio_mdev.c b/drivers/vfio/mdev/vfio_mdev.c deleted file mode 100644 index a90e24b0c851..000000000000 --- a/drivers/vfio/mdev/vfio_mdev.c +++ /dev/null @@ -1,152 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * VFIO based driver for Mediated device - * - * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. - * Author: Neo Jia <cjia@nvidia.com> - * Kirti Wankhede <kwankhede@nvidia.com> - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/vfio.h> -#include <linux/mdev.h> - -#include "mdev_private.h" - -static int vfio_mdev_open_device(struct vfio_device *core_vdev) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (unlikely(!parent->ops->open_device)) - return 0; - - return parent->ops->open_device(mdev); -} - -static void vfio_mdev_close_device(struct vfio_device *core_vdev) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (likely(parent->ops->close_device)) - parent->ops->close_device(mdev); -} - -static long vfio_mdev_unlocked_ioctl(struct vfio_device *core_vdev, - unsigned int cmd, unsigned long arg) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (unlikely(!parent->ops->ioctl)) - return 0; - - return parent->ops->ioctl(mdev, cmd, arg); -} - -static ssize_t vfio_mdev_read(struct vfio_device *core_vdev, char __user *buf, - size_t count, loff_t *ppos) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (unlikely(!parent->ops->read)) - return -EINVAL; - - return parent->ops->read(mdev, buf, count, ppos); -} - -static ssize_t vfio_mdev_write(struct vfio_device *core_vdev, - const char __user *buf, size_t count, - loff_t *ppos) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (unlikely(!parent->ops->write)) - return -EINVAL; - - return parent->ops->write(mdev, buf, count, ppos); -} - -static int vfio_mdev_mmap(struct vfio_device *core_vdev, - struct vm_area_struct *vma) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (unlikely(!parent->ops->mmap)) - return -EINVAL; - - return parent->ops->mmap(mdev, vma); -} - -static void vfio_mdev_request(struct vfio_device *core_vdev, unsigned int count) -{ - struct mdev_device *mdev = to_mdev_device(core_vdev->dev); - struct mdev_parent *parent = mdev->type->parent; - - if (parent->ops->request) - parent->ops->request(mdev, count); - else if (count == 0) - dev_notice(mdev_dev(mdev), - "No mdev vendor driver request callback support, blocked until released by user\n"); -} - -static const struct vfio_device_ops vfio_mdev_dev_ops = { - .name = "vfio-mdev", - .open_device = vfio_mdev_open_device, - .close_device = vfio_mdev_close_device, - .ioctl = vfio_mdev_unlocked_ioctl, - .read = vfio_mdev_read, - .write = vfio_mdev_write, - .mmap = vfio_mdev_mmap, - .request = vfio_mdev_request, -}; - -static int vfio_mdev_probe(struct mdev_device *mdev) -{ - struct vfio_device *vdev; - int ret; - - vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); - if (!vdev) - return -ENOMEM; - - vfio_init_group_dev(vdev, &mdev->dev, &vfio_mdev_dev_ops); - ret = vfio_register_emulated_iommu_dev(vdev); - if (ret) - goto out_uninit; - - dev_set_drvdata(&mdev->dev, vdev); - return 0; - -out_uninit: - vfio_uninit_group_dev(vdev); - kfree(vdev); - return ret; -} - -static void vfio_mdev_remove(struct mdev_device *mdev) -{ - struct vfio_device *vdev = dev_get_drvdata(&mdev->dev); - - vfio_unregister_group_dev(vdev); - vfio_uninit_group_dev(vdev); - kfree(vdev); -} - -struct mdev_driver vfio_mdev_driver = { - .driver = { - .name = "vfio_mdev", - .owner = THIS_MODULE, - .mod_name = KBUILD_MODNAME, - }, - .probe = vfio_mdev_probe, - .remove = vfio_mdev_remove, -}; |