linux/drivers/uio/uio_pci_generic.c

// SPDX-License-Identifier: GPL-2.0
/* uio_pci_generic - generic UIO driver for PCI 2.3 devices
 *
 * Copyright (C) 2009 Red Hat, Inc.
 * Author: Michael S. Tsirkin <[email protected]>
 *
 * Since the driver does not declare any device ids, you must allocate
 * id and bind the device to the driver yourself.  For example:
 *
 * # echo "8086 10f5" > /sys/bus/pci/drivers/uio_pci_generic/new_id
 * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
 * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
 * # ls -l /sys/bus/pci/devices/0000:00:19.0/driver
 * .../0000:00:19.0/driver -> ../../../bus/pci/drivers/uio_pci_generic
 *
 * Driver won't bind to devices which do not support the Interrupt Disable Bit
 * in the command register. All devices compliant to PCI 2.3 (circa 2002) and
 * all compliant PCI Express devices should support this bit.
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/uio_driver.h>

#define DRIVER_VERSION …
#define DRIVER_AUTHOR …
#define DRIVER_DESC …

struct uio_pci_generic_dev { … };

static inline struct uio_pci_generic_dev *
to_uio_pci_generic_dev(struct uio_info *info)
{ … }

static int release(struct uio_info *info, struct inode *inode)
{ … }

/* Interrupt handler. Read/modify/write the command register to disable
 * the interrupt. */
static irqreturn_t irqhandler(int irq, struct uio_info *info)
{ … }

static int probe(struct pci_dev *pdev,
			   const struct pci_device_id *id)
{ … }

static struct pci_driver uio_pci_driver = …;

module_pci_driver(…) …;
MODULE_VERSION(…);
MODULE_LICENSE(…) …;
MODULE_AUTHOR(…);
MODULE_DESCRIPTION(…);