@@ -3,3 +3,10 @@ menuconfig VFIO
depends on IOMMU_API
help
If you don't know what to do here, say N.
+
+menuconfig VFIO_PCI
+ bool "VFIO support for PCI devices"
+ depends on VFIO && PCI
+ default y if X86
+ help
+ If you don't know what to do here, say N.
@@ -1,3 +1,4 @@
obj-$(CONFIG_VFIO) := vfio.o
vfio-y := vfio_main.o vfio_iommu.o vfio_device.o
+vfio-$(CONFIG_VFIO_PCI) += vfio_pci.o
@@ -834,6 +834,12 @@ static int __init vfio_init(void)
if (ret)
goto err_cdev;
+#ifdef CONFIG_VFIO_PCI
+ ret = vfio_pci_init(&vfio);
+ if (ret)
+ pr_debug(DRIVER_DESC "PCI init failed %d\n", ret);
+#endif
+
pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
return 0;
@@ -864,6 +870,10 @@ static void __exit vfio_cleanup(void)
}
}
+#ifdef CONFIG_VFIO_PCI
+ vfio_pci_cleanup(&vfio);
+#endif
+
idr_destroy(&vfio.idr);
cdev_del(&vfio.cdev);
unregister_chrdev_region(vfio.devt, MINORMASK);
new file mode 100644
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2011 Red Hat, Inc. All rights reserved.
+ * Author: Alex Williamson <alex.williamson@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Derived from original vfio:
+ * Copyright 2010 Cisco Systems, Inc. All rights reserved.
+ * Author: Tom Lyon, pugs@cisco.com
+ */
+
+#include <linux/device.h>
+#include <linux/notifier.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/vfio.h>
+
+#include "vfio_private.h"
+
+struct vfio_pci_device {
+ struct vfio_device vdev;
+ struct pci_dev *pdev;
+};
+
+static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ return 0;
+}
+
+static void vfio_pci_remove(struct pci_dev *pdev)
+{
+}
+
+static struct pci_driver vfio_pci_driver = {
+ .name = "vfio",
+ .id_table = NULL, /* only dynamic id's */
+ .probe = vfio_pci_probe,
+ .remove = vfio_pci_remove,
+};
+
+static struct vfio_device *vfio_pci_new(struct device *dev)
+{
+ struct vfio_pci_device *pvdev;
+
+ pvdev = kzalloc(sizeof(*pvdev), GFP_KERNEL);
+ if (!pvdev)
+ return ERR_PTR(-ENOMEM);
+
+ printk("%s: alloc pvdev @%p\n", __FUNCTION__, pvdev);
+ pvdev->pdev = container_of(dev, struct pci_dev, dev);
+
+ // PCI stuff...
+
+ return &pvdev->vdev;
+}
+
+static void vfio_pci_free(struct vfio_device *vdev)
+{
+ struct vfio_pci_device *pvdev;
+
+ pvdev = container_of(vdev, struct vfio_pci_device, vdev);
+
+ // PCI stuff...
+
+ printk("%s: freeing pvdev @%p\n", __FUNCTION__, pvdev);
+ kfree(pvdev);
+}
+
+static const struct vfio_device_ops vfio_pci_ops = {
+ .new = vfio_pci_new,
+ .free = vfio_pci_free,
+};
+
+static int vfio_pci_device_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+ struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+
+ if (pdev->hdr_type != PCI_HEADER_TYPE_NORMAL)
+ return 0;
+
+ if (action == BUS_NOTIFY_ADD_DEVICE)
+ return vfio_group_add_dev(dev, (void *)&vfio_pci_ops);
+ else if (action == BUS_NOTIFY_DEL_DEVICE)
+ vfio_group_del_dev(dev);
+ return 0;
+}
+
+static int vfio_pci_add_dev(struct device *dev, void *unused)
+{
+ struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+
+ if (pdev->hdr_type != PCI_HEADER_TYPE_NORMAL)
+ return 0;
+
+ return vfio_group_add_dev(dev, (void *)&vfio_pci_ops);
+}
+
+static struct notifier_block vfio_pci_device_nb = {
+ .notifier_call = vfio_pci_device_notifier,
+};
+
+void __exit vfio_pci_cleanup(struct vfio *vfio)
+{
+ bus_unregister_notifier(&pci_bus_type, &vfio_pci_device_nb);
+ pci_unregister_driver(&vfio_pci_driver);
+}
+
+int __init vfio_pci_init(struct vfio *vfio)
+{
+ int ret;
+
+ ret = pci_register_driver(&vfio_pci_driver);
+ if (ret)
+ return ret;
+
+ bus_register_notifier(&pci_bus_type, &vfio_pci_device_nb);
+ bus_for_each_dev(&pci_bus_type, NULL, NULL, vfio_pci_add_dev);
+
+ return 0;
+}
@@ -79,4 +79,9 @@ struct vfio_group {
extern int vfio_group_add_dev(struct device *dev, void *data);
extern void vfio_group_del_dev(struct device *dev);
+#ifdef CONFIG_VFIO_PCI
+extern int vfio_pci_init(struct vfio *vfio);
+extern void vfio_pci_cleanup(struct vfio *vfio);
+#endif
+
#endif /* VFIO_PRIVATE_H */
Signed-off-by: Alex Williamson <alex.williamson@redhat.com> --- drivers/vfio/Kconfig | 7 ++ drivers/vfio/Makefile | 1 drivers/vfio/vfio_main.c | 10 +++ drivers/vfio/vfio_pci.c | 124 +++++++++++++++++++++++++++++++++++++++++++ drivers/vfio/vfio_private.h | 5 ++ 5 files changed, 147 insertions(+), 0 deletions(-) create mode 100644 drivers/vfio/vfio_pci.c