#define AG_DEF_DRIVER_NAME "ag_pcie_driver"
#define AG_DEF_BAR_NUM 6

struct ag_bookkeep {
    struct pci_dev *pci_dev;
    
    void * __iomem bar[AG_DEF_BAR_NUM];
    size_t bar_length[AG_DEF_BAR_NUM];
    
    dev_t cdevno;
    struct cdev cdev;
};

static int __init init_chrdev (struct ag_bookkeep *bk_ptr)
{
    int dev_minor = 0;
    int dev_major = 0;
    dev_t devno;

    int result = alloc_chrdev_region(&bk_ptr->cdevno, dev_minor, 1, AG_DEF_DRIVER_NAME);

    dev_major = MAJOR(bk_ptr->cdevno);
    if (result < 0)
    {
        printk(KERN_INFO "[ag_pcie_driver]:[init_chrdev]: cannot get major ID %d", dev_major);
    }
    else
        printk(KERN_INFO "[ag_pcie_driver]:[init_chrdev]: major ID %d", dev_major);

    devno = MKDEV(dev_major, dev_minor);

    cdev_init(&bk_ptr->cdev, &ag_user_fops);
    bk_ptr->cdev.owner = THIS_MODULE;
    bk_ptr->cdev.ops = &ag_user_fops;
    result = cdev_add(&bk_ptr->cdev, devno, 1);

    if (result)
    {
        printk(KERN_INFO "[ag_pcie_driver]:[init_chrdev]: cdev_add() fail");
        return -1;
    }
    printk(KERN_INFO "[ag_pcie_driver]:[init_chrdev]: cdev_add() success");
    return 0;
}

static int ag_pciedr_probe( struct pci_dev *dev, const struct pci_device_id *id )
{
    int res;
    
    struct ag_bookkeep *bk_ptr = NULL;
    bk_ptr = kzalloc(sizeof(struct ag_bookkeep), GFP_KERNEL);
    if(!bk_ptr)
    {
        printk( KERN_INFO "[ag_pcie_driver]:[ag_pciedr_probe]: kzalloc() failed\n");
        return 0;
    }
        
    bk_ptr->pci_dev = dev;
    pci_set_drvdata(dev, bk_ptr);    //зачем это????
    
    // инициализация символьного драйвера
    
    res = init_chrdev(bk_ptr);
    if (res)
    {
        kfree(bk_ptr);
        printk( KERN_INFO "[ag_pcie_driver]:[ag_pciedr_probe]: init_chrdev() failed\n");
        return 0;
    }
    else
        printk( KERN_INFO "[ag_pcie_driver]:[ag_pciedr_probe]: init_chrdev() success\n");
.........

#!/bin/sh
module="altera_dma"
device="altera_dma"
mode="666"

# load the module
/sbin/insmod ./$module.ko $* || exit 1

# remove stale nodes
rm -f /dev/$device

# create new device node
major=`grep -w $module /proc/devices | cut -f1 -d" "`
mknod /dev/$device c $major 0

# change permissions to allow all users to read/write
chmod $mode /dev/$device

# make user program
rm -f ./user/user
gcc ./user/user.c -o ./user/user