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#include <linux/cdev.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/tapi/tapi.h>
#include <linux/tapi/tapi-ioctl.h>
static inline struct tapi_port *tapi_char_device_to_port(struct tapi_char_device *chrdev)
{
return container_of(chrdev, struct tapi_port, chrdev);
}
static int tapi_port_open(struct inode *inode, struct file *file)
{
struct tapi_device *tdev = cdev_to_tapi_char_device(inode->i_cdev)->tdev;
get_device(&tdev->dev);
file->private_data = cdev_to_tapi_char_device(inode->i_cdev);
return 0;
}
static int tapi_port_release(struct inode *inode, struct file *file)
{
struct tapi_device *tdev = cdev_to_tapi_char_device(inode->i_cdev)->tdev;
put_device(&tdev->dev);
return 0;
}
static long tapi_port_ioctl_get_endpoint(struct tapi_device *tdev,
struct tapi_port *port, unsigned long arg)
{
return port->ep.id;
}
static long tapi_port_ioctl_set_ring(struct tapi_device *tdev,
struct tapi_port *port, unsigned long arg)
{
tapi_port_set_ring(tdev, port, arg);
return 0;
}
static long tapi_port_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int ret;
struct tapi_char_device *tchrdev = file->private_data;
struct tapi_device *tdev = tchrdev->tdev;
struct tapi_port *port = tapi_char_device_to_port(tchrdev);
switch (cmd) {
case TAPI_PORT_IOCTL_GET_ENDPOINT:
ret = tapi_port_ioctl_get_endpoint(tdev, port, arg);
break;
case TAPI_PORT_IOCTL_SET_RING:
ret = tapi_port_ioctl_set_ring(tdev, port, arg);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static const struct file_operations tapi_port_file_ops = {
.owner = THIS_MODULE,
.open = tapi_port_open,
.release = tapi_port_release,
.unlocked_ioctl = tapi_port_ioctl,
};
int tapi_register_port_device(struct tapi_device* tdev, struct tapi_port *port)
{
dev_set_name(&port->chrdev.dev, "tapi%uP%u", tdev->id, port->id);
return tapi_char_device_register(tdev, &port->chrdev, &tapi_port_file_ops);
}
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