path: root/drivers/vfio/fsl-mc/vfio_fsl_mc.c

/*
 * Freescale Management Complex (MC) device passthrough using VFIO
 *
 * Copyright (C) 2013-2016 Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 * Author: Bharat Bhushan <bharat.bhushan@nxp.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#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/delay.h>

#include "../../staging/fsl-mc/include/mc.h"
#include "../../staging/fsl-mc/include/mc-bus.h"
#include "../../staging/fsl-mc/include/mc-sys.h"
#include "../../staging/fsl-mc/bus/dprc-cmd.h"

#include "vfio_fsl_mc_private.h"

#define DRIVER_VERSION	"0.10"
#define DRIVER_AUTHOR	"Bharat Bhushan <bharat.bhushan@nxp.com>"
#define DRIVER_DESC	"VFIO for FSL-MC devices - User Level meta-driver"

static DEFINE_MUTEX(driver_lock);

/* FSl-MC device regions (address and size) are aligned to 64K.
 * While MC firmware reports size less than 64K for some objects (it actually
 * reports size which does not include reserved space beyond valid bytes).
 * Align the size to PAGE_SIZE for userspace to mmap.
 */
static size_t aligned_region_size(struct fsl_mc_device *mc_dev, int index)
{
	size_t size;

	size = resource_size(&mc_dev->regions[index]);
	return PAGE_ALIGN(size);
}

static int vfio_fsl_mc_regions_init(struct vfio_fsl_mc_device *vdev)
{
	struct fsl_mc_device *mc_dev = vdev->mc_dev;
	int count = mc_dev->obj_desc.region_count;
	int i;

	vdev->regions = kcalloc(count, sizeof(struct vfio_fsl_mc_region),
				GFP_KERNEL);
	if (!vdev->regions)
		return -ENOMEM;

	for (i = 0; i < mc_dev->obj_desc.region_count; i++) {
		vdev->regions[i].addr = mc_dev->regions[i].start;
		vdev->regions[i].size = aligned_region_size(mc_dev, i);
		vdev->regions[i].type = VFIO_FSL_MC_REGION_TYPE_MMIO;
		if (mc_dev->regions[i].flags & IORESOURCE_CACHEABLE)
			vdev->regions[i].type |=
					VFIO_FSL_MC_REGION_TYPE_CACHEABLE;
		vdev->regions[i].flags = VFIO_REGION_INFO_FLAG_MMAP;
		vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ;
		if (!(mc_dev->regions[i].flags & IORESOURCE_READONLY))
			vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_WRITE;
	}

	vdev->num_regions = mc_dev->obj_desc.region_count;
	return 0;
}

static void vfio_fsl_mc_regions_cleanup(struct vfio_fsl_mc_device *vdev)
{
	int i;

	for (i = 0; i < vdev->num_regions; i++)
		iounmap(vdev->regions[i].ioaddr);

	vdev->num_regions = 0;
	kfree(vdev->regions);
}

static int vfio_fsl_mc_open(void *device_data)
{
	struct vfio_fsl_mc_device *vdev = device_data;
	int ret;

	if (!try_module_get(THIS_MODULE))
		return -ENODEV;

	mutex_lock(&driver_lock);
	if (!vdev->refcnt) {
		ret = vfio_fsl_mc_regions_init(vdev);
		if (ret)
			goto error_region_init;

		ret = vfio_fsl_mc_irqs_init(vdev);
		if (ret)
			goto error_irq_init;
	}

	vdev->refcnt++;
	mutex_unlock(&driver_lock);
	return 0;

error_irq_init:
	vfio_fsl_mc_regions_cleanup(vdev);
error_region_init:
	mutex_unlock(&driver_lock);
	if (ret)
		module_put(THIS_MODULE);

	return ret;
}

static void vfio_fsl_mc_release(void *device_data)
{
	struct vfio_fsl_mc_device *vdev = device_data;
	struct fsl_mc_device *mc_dev = vdev->mc_dev;

	mutex_lock(&driver_lock);

	if (!(--vdev->refcnt)) {
		vfio_fsl_mc_regions_cleanup(vdev);
		vfio_fsl_mc_irqs_cleanup(vdev);
	}

	if (strcmp(mc_dev->obj_desc.type, "dprc") == 0)
		dprc_reset_container(mc_dev->mc_io, 0, mc_dev->mc_handle,
				     mc_dev->obj_desc.id);

	mutex_unlock(&driver_lock);

	module_put(THIS_MODULE);
}

static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
			      unsigned long arg)
{
	struct vfio_fsl_mc_device *vdev = device_data;
	struct fsl_mc_device *mc_dev = vdev->mc_dev;
	unsigned long minsz;

	if (WARN_ON(!mc_dev))
		return -ENODEV;

	switch (cmd) {
	case VFIO_DEVICE_GET_INFO:
	{
		struct vfio_device_info info;

		minsz = offsetofend(struct vfio_device_info, num_irqs);

		if (copy_from_user(&info, (void __user *)arg, minsz))
			return -EFAULT;

		if (info.argsz < minsz)
			return -EINVAL;

		info.flags = VFIO_DEVICE_FLAGS_FSL_MC;
		info.num_regions = mc_dev->obj_desc.region_count;
		info.num_irqs = mc_dev->obj_desc.irq_count;

		return copy_to_user((void __user *)arg, &info, minsz);
	}
	case VFIO_DEVICE_GET_REGION_INFO:
	{
		struct vfio_region_info info;

		minsz = offsetofend(struct vfio_region_info, offset);

		if (copy_from_user(&info, (void __user *)arg, minsz))
			return -EFAULT;

		if (info.argsz < minsz)
			return -EINVAL;

		if (info.index >= vdev->num_regions)
			return -EINVAL;

		/* map offset to the physical address  */
		info.offset = VFIO_FSL_MC_INDEX_TO_OFFSET(info.index);
		info.size = vdev->regions[info.index].size;
		info.flags = vdev->regions[info.index].flags;

		return copy_to_user((void __user *)arg, &info, minsz);
	}
	case VFIO_DEVICE_GET_IRQ_INFO:
	{
		struct vfio_irq_info info;

		minsz = offsetofend(struct vfio_irq_info, count);
		if (copy_from_user(&info, (void __user *)arg, minsz))
			return -EFAULT;

		if (info.argsz < minsz)
			return -EINVAL;

		if (info.index >= mc_dev->obj_desc.irq_count)
			return -EINVAL;

		if (vdev->mc_irqs != NULL) {
			info.flags = vdev->mc_irqs[info.index].flags;
			info.count = vdev->mc_irqs[info.index].count;
		} else {
			/*
			 * If IRQs are not initialized then these can not
			 * be configuted and used by user-space/
			 */
			info.flags = 0;
			info.count = 0;
		}

		return copy_to_user((void __user *)arg, &info, minsz);
	}
	case VFIO_DEVICE_SET_IRQS:
	{
		struct vfio_irq_set hdr;
		u8 *data = NULL;
		int ret = 0;

		minsz = offsetofend(struct vfio_irq_set, count);

		if (copy_from_user(&hdr, (void __user *)arg, minsz))
			return -EFAULT;

		if (hdr.argsz < minsz)
			return -EINVAL;

		if (hdr.index >= mc_dev->obj_desc.irq_count)
			return -EINVAL;

		if (hdr.start != 0 || hdr.count > 1)
			return -EINVAL;

		if (hdr.count == 0 &&
		    (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE) ||
		    !(hdr.flags & VFIO_IRQ_SET_ACTION_TRIGGER)))
			return -EINVAL;

		if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK |
				  VFIO_IRQ_SET_ACTION_TYPE_MASK))
			return -EINVAL;

		if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
			size_t size;

			if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL)
				size = sizeof(uint8_t);
			else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD)
				size = sizeof(int32_t);
			else
				return -EINVAL;

			if (hdr.argsz - minsz < hdr.count * size)
				return -EINVAL;

			data = memdup_user((void __user *)(arg + minsz),
					   hdr.count * size);
			if (IS_ERR(data))
				return PTR_ERR(data);
		}

		ret = vfio_fsl_mc_set_irqs_ioctl(vdev, hdr.flags,
						 hdr.index, hdr.start,
						 hdr.count, data);
		return ret;
	}
	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)
{
	struct vfio_fsl_mc_device *vdev = device_data;
	unsigned int index = VFIO_FSL_MC_OFFSET_TO_INDEX(*ppos);
	loff_t off = *ppos & VFIO_FSL_MC_OFFSET_MASK;
	struct vfio_fsl_mc_region *region;
	uint64_t data[8];
	int i;

	/* Read ioctl supported only for DPRC device */
	if (strcmp(vdev->mc_dev->obj_desc.type, "dprc"))
		return -EINVAL;

	if (index >= vdev->num_regions)
		return -EINVAL;

	region = &vdev->regions[index];

	if (!(region->flags & VFIO_REGION_INFO_FLAG_READ))
		return -EINVAL;

	if (!region->type & VFIO_FSL_MC_REGION_TYPE_MMIO)
		return -EINVAL;

	if (!region->ioaddr) {
		region->ioaddr = ioremap_nocache(region->addr, region->size);
		if (!region->ioaddr)
			return -ENOMEM;
	}

	if (count != 64 || off != 0)
		return -EINVAL;

	for (i = 7; i >= 0; i--)
		data[i] = readq(region->ioaddr + i * sizeof(uint64_t));

	if (copy_to_user(buf, data, 64))
		return -EFAULT;

	return count;
}

#define MC_CMD_COMPLETION_TIMEOUT_MS	5000
#define MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS    500

static int vfio_fsl_mc_dprc_wait_for_response(void __iomem *ioaddr)
{
	enum mc_cmd_status status;
	unsigned long timeout_usecs = MC_CMD_COMPLETION_TIMEOUT_MS * 1000;

	for (;;) {
		u64 header;
		struct mc_cmd_header *resp_hdr;

		__iormb();
		header = readq(ioaddr);
		__iormb();

		resp_hdr = (struct mc_cmd_header *)&header;
		status = (enum mc_cmd_status)resp_hdr->status;
		if (status != MC_CMD_STATUS_READY)
			break;

		udelay(MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS);
		timeout_usecs -= MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS;
		if (timeout_usecs == 0)
			return -ETIMEDOUT;
	}

	return 0;
}

static int vfio_fsl_mc_send_command(void __iomem *ioaddr, uint64_t *cmd_data)
{
	int i;

	/* Write at command header in the end */
	for (i = 7; i >= 0; i--)
		writeq(cmd_data[i], ioaddr + i * sizeof(uint64_t));

	/* Wait for response before returning to user-space
	 * This can be optimized in future to even prepare response
	 * before returning to user-space and avoid read ioctl.
	 */
	return vfio_fsl_mc_dprc_wait_for_response(ioaddr);
}

static int vfio_handle_dprc_commands(void __iomem *ioaddr, uint64_t *cmd_data)
{
	uint64_t cmd_hdr = cmd_data[0];
	int cmd = (cmd_hdr >> 52) & 0xfff;

	switch (cmd) {
	case DPRC_CMDID_OPEN:
	default:
		return vfio_fsl_mc_send_command(ioaddr, cmd_data);
	}

	return 0;
}

static ssize_t vfio_fsl_mc_write(void *device_data, const char __user *buf,
				 size_t count, loff_t *ppos)
{
	struct vfio_fsl_mc_device *vdev = device_data;
	unsigned int index = VFIO_FSL_MC_OFFSET_TO_INDEX(*ppos);
	loff_t off = *ppos & VFIO_FSL_MC_OFFSET_MASK;
	struct vfio_fsl_mc_region *region;
	uint64_t data[8];
	int ret;

	/* Write ioctl supported only for DPRC device */
	if (strcmp(vdev->mc_dev->obj_desc.type, "dprc"))
		return -EINVAL;

	if (index >= vdev->num_regions)
		return -EINVAL;

	region = &vdev->regions[index];

	if (!(region->flags & VFIO_REGION_INFO_FLAG_WRITE))
		return -EINVAL;

	if (!region->type & VFIO_FSL_MC_REGION_TYPE_MMIO)
		return -EINVAL;

	if (!region->ioaddr) {
		region->ioaddr = ioremap_nocache(region->addr, region->size);
		if (!region->ioaddr)
			return -ENOMEM;
	}

	if (count != 64 || off != 0)
		return -EINVAL;

	if (copy_from_user(&data, buf, 64))
		return -EFAULT;

	ret = vfio_handle_dprc_commands(region->ioaddr, data);
	if (ret)
		return ret;

	return count;
}

static int vfio_fsl_mc_mmap_mmio(struct vfio_fsl_mc_region region,
				 struct vm_area_struct *vma)
{
	u64 size = vma->vm_end - vma->vm_start;
	u64 pgoff, base;

	pgoff = vma->vm_pgoff &
		((1U << (VFIO_FSL_MC_OFFSET_SHIFT - PAGE_SHIFT)) - 1);
	base = pgoff << PAGE_SHIFT;

	if (region.size < PAGE_SIZE || base + size > region.size)
		return -EINVAL;
	/*
	 * Set the REGION_TYPE_CACHEABLE (QBman CENA regs) to be the
	 * cache inhibited area of the portal to avoid coherency issues
	 * if a user migrates to another core.
	 */
	if (region.type & VFIO_FSL_MC_REGION_TYPE_CACHEABLE)
		vma->vm_page_prot = pgprot_cached_ns(vma->vm_page_prot);
	else
		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

	vma->vm_pgoff = (region.addr >> PAGE_SHIFT) + pgoff;

	return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
			       size, vma->vm_page_prot);
}

/* Allows mmaping fsl_mc device regions in assigned DPRC */
static int vfio_fsl_mc_mmap(void *device_data, struct vm_area_struct *vma)
{
	struct vfio_fsl_mc_device *vdev = device_data;
	struct fsl_mc_device *mc_dev = vdev->mc_dev;
	unsigned long size, addr;
	int index;

	index = vma->vm_pgoff >> (VFIO_FSL_MC_OFFSET_SHIFT - PAGE_SHIFT);

	if (vma->vm_end < vma->vm_start)
		return -EINVAL;
	if (vma->vm_start & ~PAGE_MASK)
		return -EINVAL;
	if (vma->vm_end & ~PAGE_MASK)
		return -EINVAL;
	if (!(vma->vm_flags & VM_SHARED))
		return -EINVAL;
	if (index >= vdev->num_regions)
		return -EINVAL;

	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_MMAP))
		return -EINVAL;

	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ)
			&& (vma->vm_flags & VM_READ))
		return -EINVAL;

	if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE)
			&& (vma->vm_flags & VM_WRITE))
		return -EINVAL;

	addr = vdev->regions[index].addr;
	size = vdev->regions[index].size;

	vma->vm_private_data = mc_dev;

	if (vdev->regions[index].type & VFIO_FSL_MC_REGION_TYPE_MMIO)
		return vfio_fsl_mc_mmap_mmio(vdev->regions[index], vma);

	return -EFAULT;
}

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_initialize_dprc(struct vfio_fsl_mc_device *vdev)
{
	struct device *root_dprc_dev;
	struct fsl_mc_device *mc_dev = vdev->mc_dev;
	struct device *dev = &mc_dev->dev;
	struct fsl_mc_bus *mc_bus;
	struct irq_domain *mc_msi_domain;
	unsigned int irq_count;
	int ret;

	/* device must be DPRC */
	if (strcmp(mc_dev->obj_desc.type, "dprc"))
		return -EINVAL;

	/* mc_io must be un-initialized */
	WARN_ON(mc_dev->mc_io);

	/* allocate a portal from the root DPRC for vfio use */
	fsl_mc_get_root_dprc(dev, &root_dprc_dev);
	if (WARN_ON(!root_dprc_dev))
		return -EINVAL;

	ret = fsl_mc_portal_allocate(to_fsl_mc_device(root_dprc_dev),
				     FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
				     &mc_dev->mc_io);
	if (ret < 0)
		goto clean_msi_domain;

	/* Reset MCP before move on */
	ret = fsl_mc_portal_reset(mc_dev->mc_io);
	if (ret < 0) {
		dev_err(dev, "dprc portal reset failed: error = %d\n", ret);
		goto free_mc_portal;
	}

	/* MSI domain set up */
	ret = fsl_mc_find_msi_domain(root_dprc_dev->parent, &mc_msi_domain);
	if (ret < 0)
		goto free_mc_portal;

	dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);

	ret = dprc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
			&mc_dev->mc_handle);
	if (ret) {
		dev_err(dev, "dprc_open() failed: error = %d\n", ret);
		goto free_mc_portal;
	}

	/* Initialize resource pool */
	fsl_mc_init_all_resource_pools(mc_dev);

	mc_bus = to_fsl_mc_bus(mc_dev);

	if (!mc_bus->irq_resources) {
		irq_count = FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS;
		ret = fsl_mc_populate_irq_pool(mc_bus, irq_count);
		if (ret < 0) {
			dev_err(dev, "%s: Failed to init irq-pool\n", __func__);
			goto clean_resource_pool;
		}
	}

	mutex_init(&mc_bus->scan_mutex);

	mutex_lock(&mc_bus->scan_mutex);
	ret = dprc_scan_objects(mc_dev, mc_dev->driver_override,
				&irq_count);
	mutex_unlock(&mc_bus->scan_mutex);
	if (ret) {
		dev_err(dev, "dprc_scan_objects() fails (%d)\n", ret);
		goto clean_irq_pool;
	}

	if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) {
		dev_warn(&mc_dev->dev,
			 "IRQs needed (%u) exceed IRQs preallocated (%u)\n",
			 irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
	}

	return 0;

clean_irq_pool:
	fsl_mc_cleanup_irq_pool(mc_bus);

clean_resource_pool:
	fsl_mc_cleanup_all_resource_pools(mc_dev);
	dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);

free_mc_portal:
	fsl_mc_portal_free(mc_dev->mc_io);

clean_msi_domain:
	dev_set_msi_domain(&mc_dev->dev, NULL);

	return ret;
}

static int vfio_fsl_mc_device_remove(struct device *dev, void *data)
{
	struct fsl_mc_device *mc_dev;

	WARN_ON(dev == NULL);

	mc_dev = to_fsl_mc_device(dev);
	if (WARN_ON(mc_dev == NULL))
		return -ENODEV;

	fsl_mc_device_remove(mc_dev);
	return 0;
}

static void vfio_fsl_mc_cleanup_dprc(struct vfio_fsl_mc_device *vdev)
{
	struct fsl_mc_device *mc_dev = vdev->mc_dev;
	struct fsl_mc_bus *mc_bus;

	/* device must be DPRC */
	if (strcmp(mc_dev->obj_desc.type, "dprc"))
		return;

	device_for_each_child(&mc_dev->dev, NULL, vfio_fsl_mc_device_remove);

	mc_bus = to_fsl_mc_bus(mc_dev);
	if (dev_get_msi_domain(&mc_dev->dev))
		fsl_mc_cleanup_irq_pool(mc_bus);

	dev_set_msi_domain(&mc_dev->dev, NULL);

	fsl_mc_cleanup_all_resource_pools(mc_dev);
	dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
	fsl_mc_portal_free(mc_dev->mc_io);
}

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 = kzalloc(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__);
		goto free_vfio_device;
	}

	/* DPRC container scanned and it's chilren bound with vfio driver */
	if (strcmp(mc_dev->obj_desc.type, "dprc") == 0) {
		ret = vfio_fsl_mc_initialize_dprc(vdev);
		if (ret) {
			vfio_del_group_dev(dev);
			goto free_vfio_device;
		}
	} else {
		struct fsl_mc_device *mc_bus_dev;

		/* Non-dprc devices share mc_io from the parent dprc */
		mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
		if (mc_bus_dev == NULL) {
			vfio_del_group_dev(dev);
			goto free_vfio_device;
		}

		mc_dev->mc_io = mc_bus_dev->mc_io;

		/* Inherit parent MSI domain */
		dev_set_msi_domain(&mc_dev->dev,
				   dev_get_msi_domain(mc_dev->dev.parent));
	}
	return 0;

free_vfio_device:
	kfree(vdev);
	vfio_iommu_group_put(group, dev);
	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;

	if (strcmp(mc_dev->obj_desc.type, "dprc") == 0)
		vfio_fsl_mc_cleanup_dprc(vdev);
	else
		dev_set_msi_domain(&mc_dev->dev, NULL);

	mc_dev->mc_io = NULL;

	vfio_iommu_group_put(mc_dev->dev.iommu_group, dev);
	kfree(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_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);