File dmabuf_fops.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __AKOZLINS_DMABUF_FOPS_H
#define __AKOZLINS_DMABUF_FOPS_H

#include "dmabuf.h"

static loff_t dmabuf_fops_llseek(struct file* file, loff_t loff, int whence) {
    struct dmabuf* dmabuf = file->private_data;
    return dmabuf_llseek(dmabuf, file, loff, whence);
}

static ssize_t dmabuf_fops_read(struct file* file, char __user* user_buffer, size_t size,
                                loff_t* offset) {
    struct dmabuf* dmabuf = file->private_data;
    ssize_t n = dmabuf_read(dmabuf, user_buffer, size, *offset);
    *offset += n;
    return n;
}

static ssize_t dmabuf_fops_write(struct file* file, const char __user* user_buffer, size_t size,
                                 loff_t* offset) {
    struct dmabuf* dmabuf = file->private_data;
    ssize_t n = dmabuf_write(dmabuf, user_buffer, size, *offset);
    *offset += n;
    return n;
}

static int dmabuf_fops_mmap(struct file* file, struct vm_area_struct* vma) {
    struct dmabuf* dmabuf = file->private_data;
    return dmabuf_mmap(dmabuf, vma);
}

static int dmabuf_fops_release(struct inode* inode, struct file* file) {
    M_INFO("\n");

    return 0;
}

static const struct file_operations dmabuf_fops = {
    .owner = THIS_MODULE,
    .llseek = dmabuf_fops_llseek,
    .read = dmabuf_fops_read,
    .write = dmabuf_fops_write,
    .mmap = dmabuf_fops_mmap,
    .open = dmabuf_fops_open,
    .release = dmabuf_fops_release,
};

#endif  // __AKOZLINS_DMABUF_FOPS_H