Release 4.14 drivers/uio/uio_pci_generic.c
/* uio_pci_generic - generic UIO driver for PCI 2.3 devices
*
* Copyright (C) 2009 Red Hat, Inc.
* Author: Michael S. Tsirkin <mst@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2.
*
* 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 "0.01.0"
#define DRIVER_AUTHOR "Michael S. Tsirkin <mst@redhat.com>"
#define DRIVER_DESC "Generic UIO driver for PCI 2.3 devices"
struct uio_pci_generic_dev {
struct uio_info info;
struct pci_dev *pdev;
};
static inline struct uio_pci_generic_dev *
to_uio_pci_generic_dev(struct uio_info *info)
{
return container_of(info, struct uio_pci_generic_dev, info);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael S. Tsirkin | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
/* Interrupt handler. Read/modify/write the command register to disable
* the interrupt. */
static irqreturn_t irqhandler(int irq, struct uio_info *info)
{
struct uio_pci_generic_dev *gdev = to_uio_pci_generic_dev(info);
if (!pci_check_and_mask_intx(gdev->pdev))
return IRQ_NONE;
/* UIO core will signal the user process. */
return IRQ_HANDLED;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael S. Tsirkin | 32 | 78.05% | 1 | 33.33% |
| Jan Kiszka | 9 | 21.95% | 2 | 66.67% |
| Total | 41 | 100.00% | 3 | 100.00% |
static int probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct uio_pci_generic_dev *gdev;
int err;
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",
__func__, err);
return err;
}
if (pdev->irq && !pci_intx_mask_supported(pdev)) {
err = -ENODEV;
goto err_verify;
}
gdev = kzalloc(sizeof(struct uio_pci_generic_dev), GFP_KERNEL);
if (!gdev) {
err = -ENOMEM;
goto err_alloc;
}
gdev->info.name = "uio_pci_generic";
gdev->info.version = DRIVER_VERSION;
gdev->pdev = pdev;
if (pdev->irq) {
gdev->info.irq = pdev->irq;
gdev->info.irq_flags = IRQF_SHARED;
gdev->info.handler = irqhandler;
} else {
dev_warn(&pdev->dev, "No IRQ assigned to device: "
"no support for interrupts?\n");
}
err = uio_register_device(&pdev->dev, &gdev->info);
if (err)
goto err_register;
pci_set_drvdata(pdev, gdev);
return 0;
err_register:
kfree(gdev);
err_alloc:
err_verify:
pci_disable_device(pdev);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael S. Tsirkin | 179 | 79.20% | 1 | 20.00% |
| Jim Harris | 27 | 11.95% | 1 | 20.00% |
| Jan Kiszka | 9 | 3.98% | 1 | 20.00% |
| Alexey Khoroshilov | 6 | 2.65% | 1 | 20.00% |
| Vasiliy Kulikov | 5 | 2.21% | 1 | 20.00% |
| Total | 226 | 100.00% | 5 | 100.00% |
static void remove(struct pci_dev *pdev)
{
struct uio_pci_generic_dev *gdev = pci_get_drvdata(pdev);
uio_unregister_device(&gdev->info);
pci_disable_device(pdev);
kfree(gdev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael S. Tsirkin | 39 | 100.00% | 1 | 100.00% |
| Total | 39 | 100.00% | 1 | 100.00% |
static struct pci_driver uio_pci_driver = {
.name = "uio_pci_generic",
.id_table = NULL, /* only dynamic id's */
.probe = probe,
.remove = remove,
};
module_pci_driver(uio_pci_driver);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael S. Tsirkin | 365 | 85.48% | 1 | 12.50% |
| Jim Harris | 27 | 6.32% | 1 | 12.50% |
| Jan Kiszka | 18 | 4.22% | 2 | 25.00% |
| Alexey Khoroshilov | 6 | 1.41% | 1 | 12.50% |
| Vasiliy Kulikov | 5 | 1.17% | 1 | 12.50% |
| Tejun Heo | 3 | 0.70% | 1 | 12.50% |
| Peter Hüwe | 3 | 0.70% | 1 | 12.50% |
| Total | 427 | 100.00% | 8 | 100.00% |
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