* alloc_tty_struct() always uses kmalloc() -- Andrew Morton <andrewm@uow.edu.eu> 17Mar01
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/kbd_kern.h>
#include <linux/vt_kern.h>
#include <linux/selection.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/kmod.h>
p->used = 0;
p->size = size;
p->next = NULL;
- p->active = 0;
p->commit = 0;
p->read = 0;
p->char_buf_ptr = (char *)(p->data);
/* OPTIMISATION: We could keep a per tty "zero" sized buffer to
remove this conditional if its worth it. This would be invisible
to the callers */
- if ((b = tty->buf.tail) != NULL) {
+ if ((b = tty->buf.tail) != NULL)
left = b->size - b->used;
- b->active = 1;
- } else
+ else
left = 0;
if (left < size) {
if ((n = tty_buffer_find(tty, size)) != NULL) {
if (b != NULL) {
b->next = n;
- b->active = 0;
b->commit = b->used;
} else
tty->buf.head = n;
tty->buf.tail = n;
- n->active = 1;
} else
size = left;
}
{
unsigned long flags;
spin_lock_irqsave(&tty->buf.lock, flags);
- if (tty->buf.tail != NULL) {
- tty->buf.tail->active = 0;
+ if (tty->buf.tail != NULL)
tty->buf.tail->commit = tty->buf.tail->used;
- }
spin_unlock_irqrestore(&tty->buf.lock, flags);
schedule_delayed_work(&tty->buf.work, 1);
}
}
clear_bit(TTY_LDISC, &tty->flags);
- clear_bit(TTY_DONT_FLIP, &tty->flags);
- if (o_tty) {
+ if (o_tty)
clear_bit(TTY_LDISC, &o_tty->flags);
- clear_bit(TTY_DONT_FLIP, &o_tty->flags);
- }
spin_unlock_irqrestore(&tty_ldisc_lock, flags);
/*
return cmd == TIOCSPGRP ? -ENOTTY : -EIO;
}
-static struct file_operations tty_fops = {
+static const struct file_operations tty_fops = {
.llseek = no_llseek,
.read = tty_read,
.write = tty_write,
};
#ifdef CONFIG_UNIX98_PTYS
-static struct file_operations ptmx_fops = {
+static const struct file_operations ptmx_fops = {
.llseek = no_llseek,
.read = tty_read,
.write = tty_write,
};
#endif
-static struct file_operations console_fops = {
+static const struct file_operations console_fops = {
.llseek = no_llseek,
.read = tty_read,
.write = redirected_tty_write,
.fasync = tty_fasync,
};
-static struct file_operations hung_up_tty_fops = {
+static const struct file_operations hung_up_tty_fops = {
.llseek = no_llseek,
.read = hung_up_tty_read,
.write = hung_up_tty_write,
* race with the set_ldisc code path.
*/
clear_bit(TTY_LDISC, &tty->flags);
- clear_bit(TTY_DONT_FLIP, &tty->flags);
cancel_delayed_work(&tty->buf.work);
/*
static int tiocsctty(struct tty_struct *tty, int arg)
{
- task_t *p;
+ struct task_struct *p;
if (current->signal->leader &&
(current->signal->session == tty->session))
tty->driver->break_ctl(tty, 0);
return 0;
case TCSBRK: /* SVID version: non-zero arg --> no break */
- /*
- * XXX is the above comment correct, or the
- * code below correct? Is this ioctl used at
- * all by anyone?
+ /* non-zero arg means wait for all output data
+ * to be sent (performed above) but don't send break.
+ * This is used by the tcdrain() termios function.
*/
if (!arg)
return send_break(tty, 250);
struct tty_struct *tty = (struct tty_struct *) private_;
unsigned long flags;
struct tty_ldisc *disc;
- struct tty_buffer *tbuf;
- int count;
+ struct tty_buffer *tbuf, *head;
char *char_buf;
unsigned char *flag_buf;
if (disc == NULL) /* !TTY_LDISC */
return;
- if (test_bit(TTY_DONT_FLIP, &tty->flags)) {
- /*
- * Do it after the next timer tick:
- */
- schedule_delayed_work(&tty->buf.work, 1);
- goto out;
- }
spin_lock_irqsave(&tty->buf.lock, flags);
- while((tbuf = tty->buf.head) != NULL) {
- while ((count = tbuf->commit - tbuf->read) != 0) {
- char_buf = tbuf->char_buf_ptr + tbuf->read;
- flag_buf = tbuf->flag_buf_ptr + tbuf->read;
- tbuf->read += count;
+ head = tty->buf.head;
+ if (head != NULL) {
+ tty->buf.head = NULL;
+ for (;;) {
+ int count = head->commit - head->read;
+ if (!count) {
+ if (head->next == NULL)
+ break;
+ tbuf = head;
+ head = head->next;
+ tty_buffer_free(tty, tbuf);
+ continue;
+ }
+ if (!tty->receive_room) {
+ schedule_delayed_work(&tty->buf.work, 1);
+ break;
+ }
+ if (count > tty->receive_room)
+ count = tty->receive_room;
+ char_buf = head->char_buf_ptr + head->read;
+ flag_buf = head->flag_buf_ptr + head->read;
+ head->read += count;
spin_unlock_irqrestore(&tty->buf.lock, flags);
disc->receive_buf(tty, char_buf, flag_buf, count);
spin_lock_irqsave(&tty->buf.lock, flags);
}
- if (tbuf->active)
- break;
- tty->buf.head = tbuf->next;
- if (tty->buf.head == NULL)
- tty->buf.tail = NULL;
- tty_buffer_free(tty, tbuf);
+ tty->buf.head = head;
}
spin_unlock_irqrestore(&tty->buf.lock, flags);
-out:
+
tty_ldisc_deref(disc);
}
{
unsigned long flags;
spin_lock_irqsave(&tty->buf.lock, flags);
- if (tty->buf.tail != NULL) {
- tty->buf.tail->active = 0;
+ if (tty->buf.tail != NULL)
tty->buf.tail->commit = tty->buf.tail->used;
- }
spin_unlock_irqrestore(&tty->buf.lock, flags);
if (tty->low_latency)
* Returns a pointer to the class device (or ERR_PTR(-EFOO) on error).
*
* This call is required to be made to register an individual tty device if
- * the tty driver's flags have the TTY_DRIVER_NO_DEVFS bit set. If that
- * bit is not set, this function should not be called.
+ * the tty driver's flags have the TTY_DRIVER_DYNAMIC_DEV bit set. If that
+ * bit is not set, this function should not be called by a tty driver.
*/
struct class_device *tty_register_device(struct tty_driver *driver,
unsigned index, struct device *device)
return ERR_PTR(-EINVAL);
}
- devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
- "%s%d", driver->devfs_name, index + driver->name_base);
-
if (driver->type == TTY_DRIVER_TYPE_PTY)
pty_line_name(driver, index, name);
else
*/
void tty_unregister_device(struct tty_driver *driver, unsigned index)
{
- devfs_remove("%s%d", driver->devfs_name, index + driver->name_base);
class_device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index);
}
list_add(&driver->tty_drivers, &tty_drivers);
- if ( !(driver->flags & TTY_DRIVER_NO_DEVFS) ) {
+ if ( !(driver->flags & TTY_DRIVER_DYNAMIC_DEV) ) {
for(i = 0; i < driver->num; i++)
tty_register_device(driver, i, NULL);
}
driver->termios_locked[i] = NULL;
kfree(tp);
}
- if (!(driver->flags & TTY_DRIVER_NO_DEVFS))
+ if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))
tty_unregister_device(driver, i);
}
p = driver->ttys;
if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
panic("Couldn't register /dev/tty driver\n");
- devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 0), S_IFCHR|S_IRUGO|S_IWUGO, "tty");
class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty");
cdev_init(&console_cdev, &console_fops);
if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
panic("Couldn't register /dev/console driver\n");
- devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 1), S_IFCHR|S_IRUSR|S_IWUSR, "console");
class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL, "console");
#ifdef CONFIG_UNIX98_PTYS
if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
panic("Couldn't register /dev/ptmx driver\n");
- devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 2), S_IFCHR|S_IRUGO|S_IWUGO, "ptmx");
class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
#endif
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
panic("Couldn't register /dev/tty0 driver\n");
- devfs_mk_cdev(MKDEV(TTY_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vc/0");
class_device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
vty_init();
projects / powerpc.git / blobdiff