--- /dev/null
+From 8b9efd00727523c56eb9d17ad42338b6090b4b8e Mon Sep 17 00:00:00 2001
+From: Bharat Bhushan <Bharat.Bhushan@nxp.com>
+Date: Fri, 12 May 2017 10:27:07 +0530
+Subject: [PATCH] vfio/fsl-mc: Add VFIO framework skeleton for fsl-mc devices
+
+This patch adds the infrastructure for VFIO support for fsl-mc
+devices. Subsequent patches will add support for binding and secure
+assigning these devices using VFIO.
+
+FSL-MC is a new bus (driver/bus/fsl-mc/) which is different
+from PCI and Platform bus.
+
+Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
+Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
+---
+ drivers/vfio/Kconfig | 1 +
+ drivers/vfio/Makefile | 1 +
+ drivers/vfio/fsl-mc/Kconfig | 9 ++
+ drivers/vfio/fsl-mc/Makefile | 2 +
+ drivers/vfio/fsl-mc/vfio_fsl_mc.c | 162 ++++++++++++++++++++++++++++++
+ drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | 14 +++
+ include/uapi/linux/vfio.h | 1 +
+ 7 files changed, 190 insertions(+)
+ create mode 100644 drivers/vfio/fsl-mc/Kconfig
+ create mode 100644 drivers/vfio/fsl-mc/Makefile
+ create mode 100644 drivers/vfio/fsl-mc/vfio_fsl_mc.c
+ create mode 100644 drivers/vfio/fsl-mc/vfio_fsl_mc_private.h
+
+--- a/drivers/vfio/Kconfig
++++ b/drivers/vfio/Kconfig
+@@ -47,4 +47,5 @@ menuconfig VFIO_NOIOMMU
+ source "drivers/vfio/pci/Kconfig"
+ source "drivers/vfio/platform/Kconfig"
+ source "drivers/vfio/mdev/Kconfig"
++source "drivers/vfio/fsl-mc/Kconfig"
+ source "virt/lib/Kconfig"
+--- a/drivers/vfio/Makefile
++++ b/drivers/vfio/Makefile
+@@ -9,3 +9,4 @@ obj-$(CONFIG_VFIO_SPAPR_EEH) += vfio_spa
+ obj-$(CONFIG_VFIO_PCI) += pci/
+ obj-$(CONFIG_VFIO_PLATFORM) += platform/
+ obj-$(CONFIG_VFIO_MDEV) += mdev/
++obj-$(CONFIG_VFIO_FSL_MC) += fsl-mc/
+--- /dev/null
++++ b/drivers/vfio/fsl-mc/Kconfig
+@@ -0,0 +1,9 @@
++config VFIO_FSL_MC
++ tristate "VFIO support for QorIQ DPAA2 fsl-mc bus devices"
++ depends on VFIO && FSL_MC_BUS && EVENTFD
++ help
++ Driver to enable support for the VFIO QorIQ DPAA2 fsl-mc
++ (Management Complex) devices. This is required to passthrough
++ fsl-mc bus devices using the VFIO framework.
++
++ If you don't know what to do here, say N.
+--- /dev/null
++++ b/drivers/vfio/fsl-mc/Makefile
+@@ -0,0 +1,2 @@
++vfio-fsl_mc-y := vfio_fsl_mc.o
++obj-$(CONFIG_VFIO_FSL_MC) += vfio_fsl_mc.o
+--- /dev/null
++++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+@@ -0,0 +1,162 @@
++// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
++/*
++ * Copyright 2013-2016 Freescale Semiconductor Inc.
++ * Copyright 2016-2017,2019 NXP
++ */
++
++#include <linux/device.h>
++#include <linux/iommu.h>
++#include <linux/module.h>
++#include <linux/mutex.h>
++#include <linux/slab.h>
++#include <linux/types.h>
++#include <linux/vfio.h>
++#include <linux/fsl/mc.h>
++
++#include "vfio_fsl_mc_private.h"
++
++
++static int vfio_fsl_mc_open(void *device_data)
++{
++ if (!try_module_get(THIS_MODULE))
++ return -ENODEV;
++
++ return 0;
++}
++
++static void vfio_fsl_mc_release(void *device_data)
++{
++ module_put(THIS_MODULE);
++}
++
++static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
++ unsigned long arg)
++{
++ switch (cmd) {
++ case VFIO_DEVICE_GET_INFO:
++ {
++ return -EINVAL;
++ }
++ case VFIO_DEVICE_GET_REGION_INFO:
++ {
++ return -EINVAL;
++ }
++ case VFIO_DEVICE_GET_IRQ_INFO:
++ {
++ return -EINVAL;
++ }
++ case VFIO_DEVICE_SET_IRQS:
++ {
++ return -EINVAL;
++ }
++ case VFIO_DEVICE_RESET:
++ {
++ return -EINVAL;
++ }
++ default:
++ return -EINVAL;
++ }
++}
++
++static ssize_t vfio_fsl_mc_read(void *device_data, char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ return -EINVAL;
++}
++
++static ssize_t vfio_fsl_mc_write(void *device_data, const char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ return -EINVAL;
++}
++
++static int vfio_fsl_mc_mmap(void *device_data, struct vm_area_struct *vma)
++{
++ return -EINVAL;
++}
++
++static const struct vfio_device_ops vfio_fsl_mc_ops = {
++ .name = "vfio-fsl-mc",
++ .open = vfio_fsl_mc_open,
++ .release = vfio_fsl_mc_release,
++ .ioctl = vfio_fsl_mc_ioctl,
++ .read = vfio_fsl_mc_read,
++ .write = vfio_fsl_mc_write,
++ .mmap = vfio_fsl_mc_mmap,
++};
++
++static int vfio_fsl_mc_probe(struct fsl_mc_device *mc_dev)
++{
++ struct iommu_group *group;
++ struct vfio_fsl_mc_device *vdev;
++ struct device *dev = &mc_dev->dev;
++ int ret;
++
++ group = vfio_iommu_group_get(dev);
++ if (!group) {
++ dev_err(dev, "%s: VFIO: No IOMMU group\n", __func__);
++ return -EINVAL;
++ }
++
++ vdev = devm_kzalloc(dev, sizeof(*vdev), GFP_KERNEL);
++ if (!vdev) {
++ vfio_iommu_group_put(group, dev);
++ return -ENOMEM;
++ }
++
++ vdev->mc_dev = mc_dev;
++
++ ret = vfio_add_group_dev(dev, &vfio_fsl_mc_ops, vdev);
++ if (ret) {
++ dev_err(dev, "%s: Failed to add to vfio group\n", __func__);
++ vfio_iommu_group_put(group, dev);
++ return ret;
++ }
++
++ return ret;
++}
++
++static int vfio_fsl_mc_remove(struct fsl_mc_device *mc_dev)
++{
++ struct vfio_fsl_mc_device *vdev;
++ struct device *dev = &mc_dev->dev;
++
++ vdev = vfio_del_group_dev(dev);
++ if (!vdev)
++ return -EINVAL;
++
++ vfio_iommu_group_put(mc_dev->dev.iommu_group, dev);
++ devm_kfree(dev, vdev);
++
++ return 0;
++}
++
++/*
++ * vfio-fsl_mc is a meta-driver, so use driver_override interface to
++ * bind a fsl_mc container with this driver and match_id_table is NULL.
++ */
++static struct fsl_mc_driver vfio_fsl_mc_driver = {
++ .probe = vfio_fsl_mc_probe,
++ .remove = vfio_fsl_mc_remove,
++ .match_id_table = NULL,
++ .driver = {
++ .name = "vfio-fsl-mc",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init vfio_fsl_mc_driver_init(void)
++{
++ return fsl_mc_driver_register(&vfio_fsl_mc_driver);
++}
++
++static void __exit vfio_fsl_mc_driver_exit(void)
++{
++ fsl_mc_driver_unregister(&vfio_fsl_mc_driver);
++}
++
++module_init(vfio_fsl_mc_driver_init);
++module_exit(vfio_fsl_mc_driver_exit);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("VFIO for FSL-MC devices - User Level meta-driver");
+--- /dev/null
++++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h
+@@ -0,0 +1,14 @@
++/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
++/*
++ * Copyright 2013-2016 Freescale Semiconductor Inc.
++ * Copyright 2016,2019 NXP
++ */
++
++#ifndef VFIO_FSL_MC_PRIVATE_H
++#define VFIO_FSL_MC_PRIVATE_H
++
++struct vfio_fsl_mc_device {
++ struct fsl_mc_device *mc_dev;
++};
++
++#endif /* VFIO_PCI_PRIVATE_H */
+--- a/include/uapi/linux/vfio.h
++++ b/include/uapi/linux/vfio.h
+@@ -201,6 +201,7 @@ struct vfio_device_info {
+ #define VFIO_DEVICE_FLAGS_AMBA (1 << 3) /* vfio-amba device */
+ #define VFIO_DEVICE_FLAGS_CCW (1 << 4) /* vfio-ccw device */
+ #define VFIO_DEVICE_FLAGS_AP (1 << 5) /* vfio-ap device */
++#define VFIO_DEVICE_FLAGS_FSL_MC (1 << 6) /* vfio-fsl-mc device */
+ __u32 num_regions; /* Max region index + 1 */
+ __u32 num_irqs; /* Max IRQ index + 1 */
+ };
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