@@ -18015,6 +18015,12 @@ F: drivers/vfio/
F: include/linux/vfio.h
F: include/uapi/linux/vfio.h
+VFIO FSL-MC DRIVER
+M: Diana Craciun <diana.craciun@oss.nxp.com>
+L: kvm@vger.kernel.org
+S: Maintained
+F: drivers/vfio/fsl-mc/
+
VFIO MEDIATED DEVICE DRIVERS
M: Kirti Wankhede <kwankhede@nvidia.com>
L: kvm@vger.kernel.org
@@ -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"
@@ -9,3 +9,4 @@ obj-$(CONFIG_VFIO_SPAPR_EEH) += vfio_spapr_eeh.o
obj-$(CONFIG_VFIO_PCI) += pci/
obj-$(CONFIG_VFIO_PLATFORM) += platform/
obj-$(CONFIG_VFIO_MDEV) += mdev/
+obj-$(CONFIG_VFIO_FSL_MC) += fsl-mc/
new file mode 100644
@@ -0,0 +1,9 @@
+config VFIO_FSL_MC
+ tristate "VFIO support for QorIQ DPAA2 fsl-mc bus devices"
+ depends on VFIO && FSL_MC_BUS && EVENTFD
+ help
+ Driver to enable support for the VFIO QorIQ DPAA2 fsl-mc
+ (Management Complex) devices. This is required to passthrough
+ fsl-mc bus devices using the VFIO framework.
+
+ If you don't know what to do here, say N.
new file mode 100644
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+
+vfio-fsl-mc-y := vfio_fsl_mc.o
+obj-$(CONFIG_VFIO_FSL_MC) += vfio-fsl-mc.o
new file mode 100644
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ * Copyright 2016-2017,2019-2020 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 -ENOTTY;
+ }
+ case VFIO_DEVICE_GET_REGION_INFO:
+ {
+ return -ENOTTY;
+ }
+ case VFIO_DEVICE_GET_IRQ_INFO:
+ {
+ return -ENOTTY;
+ }
+ case VFIO_DEVICE_SET_IRQS:
+ {
+ return -ENOTTY;
+ }
+ case VFIO_DEVICE_RESET:
+ {
+ return -ENOTTY;
+ }
+ default:
+ return -ENOTTY;
+ }
+}
+
+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);
+
+ 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");
new file mode 100644
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ * Copyright 2016,2019-2020 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_FSL_MC_PRIVATE_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 */
};