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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Virtio PCI driver - common functionality for all device versions
*
* This module allows virtio devices to be used over a virtual PCI device.
* This can be used with QEMU based VMMs like KVM or Xen.
*
* Copyright IBM Corp. 2007
* Copyright Red Hat, Inc. 2014
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Rusty Russell <rusty@rustcorp.com.au>
* Michael S. Tsirkin <mst@redhat.com>
*/
#include <common.h>
#include <init.h>
#include "virtio_pci_common.h"
/* Qumranet donated their vendor ID for devices 0x1000 thru 0x10FF. */
static const struct pci_device_id virtio_pci_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_REDHAT_QUMRANET, PCI_ANY_ID) },
{ 0 }
};
static int virtio_pci_probe(struct pci_dev *pci_dev,
const struct pci_device_id *id)
{
struct virtio_pci_device *vp_dev;
int rc;
/* allocate our structure and fill it out */
vp_dev = kzalloc(sizeof(struct virtio_pci_device), GFP_KERNEL);
if (!vp_dev)
return -ENOMEM;
pci_dev->dev.priv = vp_dev;
vp_dev->vdev.dev.parent = &pci_dev->dev;
vp_dev->pci_dev = pci_dev;
/* enable the device */
rc = pci_enable_device(pci_dev);
if (rc)
goto err_enable_device;
rc = virtio_pci_modern_probe(vp_dev);
if (rc == -ENODEV)
dev_err(&pci_dev->dev, "Legacy and transitional devices unsupported\n");
if (rc)
goto err_enable_device;
pci_set_master(pci_dev);
rc = register_virtio_device(&vp_dev->vdev);
if (rc)
goto err_probe;
return 0;
err_probe:
pci_clear_master(pci_dev);
err_enable_device:
kfree(vp_dev);
return rc;
}
static void virtio_pci_remove(struct pci_dev *pci_dev)
{
struct virtio_pci_device *vp_dev = pci_dev->dev.priv;
unregister_virtio_device(&vp_dev->vdev);
pci_clear_master(pci_dev);
}
static struct pci_driver virtio_pci_driver = {
.name = "virtio-pci",
.id_table = virtio_pci_id_table,
.probe = virtio_pci_probe,
.remove = virtio_pci_remove,
};
device_pci_driver(virtio_pci_driver);
MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>");
MODULE_DESCRIPTION("virtio-pci");
MODULE_LICENSE("GPL");
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