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#include "char.h"
#include <linux/anon_inodes.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include "doomdev.h"
#include "harddoom.h"
#include "util.h"
#include "pci.h"
#include "surface.h"
#define DOOMDEV_COUNT 256
#define DOOMDEV_NAME "doom"
dev_t first;
int major;
bool minors[DOOMDEV_COUNT];
long do_new_surface(struct file *filp, unsigned long arg)
{
struct doomdev_ioctl_create_surface param;
int not_copied;
int err;
not_copied = copy_from_user(¶m, (void __iomem *) arg, sizeof(param));
if (not_copied) {
err = -EFAULT;
goto error_param;
}
err = new_surface(filp, ¶m);
error_param:
return err;
}
long do_new_texture(struct file *filp, unsigned long arg)
{
struct doomdev_ioctl_create_texture param;
int not_copied;
int err;
not_copied = copy_from_user(¶m, (void __iomem *) arg, sizeof(param));
if (not_copied) {
err = -EFAULT;
goto error_param;
}
err = new_texture(filp, ¶m);
error_param:
return err;
}
long do_new_flat(struct file *filp, unsigned long arg)
{
struct doomdev_ioctl_create_flat param;
int not_copied;
int err;
not_copied = copy_from_user(¶m, (void __iomem *) arg, sizeof(param));
if (not_copied) {
err = -EFAULT;
goto error_param;
}
err = new_flat(filp, ¶m);
error_param:
return err;
}
long do_new_colors(struct file *filp, unsigned long arg)
{
struct doomdev_ioctl_create_colormaps param;
int not_copied;
int err;
not_copied = copy_from_user(¶m, (void __iomem *) arg, sizeof(param));
if (not_copied) {
err = -EFAULT;
goto error_param;
}
err = new_colors(filp, ¶m);
error_param:
return err;
}
long doom_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case DOOMDEV_IOCTL_CREATE_SURFACE:
return do_new_surface(filp, arg);
case DOOMDEV_IOCTL_CREATE_TEXTURE:
return do_new_texture(filp, arg);
case DOOMDEV_IOCTL_CREATE_FLAT:
return do_new_flat(filp, arg);
case DOOMDEV_IOCTL_CREATE_COLORMAPS:
return do_new_colors(filp, arg);
default:
return -ENOTTY;
}
}
int doom_open(struct inode *inode, struct file *filp)
{
return 0;
}
struct file_operations doomdev_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = doom_ioctl,
.compat_ioctl = doom_ioctl,
.open = doom_open
};
struct class *doom_class;
int alloc_minor(void) {
int i;
for (i = 0; i < DOOMDEV_COUNT; i++) {
if (!minors[i]) {
minors[i] = true;
return i;
}
}
return -EOVERFLOW;
}
void free_minor(int minor) {
minors[minor] = false;
}
int new_doomdev(struct pci_dev *dev)
{
int err = 0;
int minor;
struct doom_data *doom_data;
dev_t devt;
doom_data = pci_get_drvdata(dev);
cdev_init(&doom_data->cdev, &doomdev_fops);
ORFAIL(cdev_add(&doom_data->cdev, first, 1), error_add);
minor = alloc_minor();
ORFAIL(minor, error_minor);
devt = MKDEV(major, minor);
doom_data->device = device_create(doom_class, &dev->dev, devt, NULL,
"doom%d", minor);
ORFAIL_PTR(doom_data->device, error_create);
return 0;
error_create:
free_minor(minor);
error_minor:
cdev_del(&doom_data->cdev);
error_add:
return err;
}
void destroy_doomdev(struct doom_data *doom_data)
{
free_minor(MINOR(doom_data->device->devt));
device_destroy(doom_class, doom_data->device->devt);
cdev_del(&doom_data->cdev);
}
int char_init(void)
{
int err = 0;
ORFAIL(alloc_chrdev_region(&first, 0, DOOMDEV_COUNT, DOOMDEV_NAME),
error_region);
major = MAJOR(first);
doom_class = class_create(THIS_MODULE, "doom");
ORFAIL_PTR(doom_class, error_create);
return 0;
error_create:
unregister_chrdev_region(first, DOOMDEV_COUNT);
error_region:
return err;
}
void char_cleanup(void)
{
unregister_chrdev_region(first, DOOMDEV_COUNT);
class_unregister(doom_class);
class_destroy(doom_class);
}
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