* by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998
*
* Removed old-style timers, introduced console_timer, made timer
- * deletion SMP-safe. 17Jun00, Andrew Morton <andrewm@uow.edu.au>
+ * deletion SMP-safe. 17Jun00, Andrew Morton
*
* Removed console_lock, enabled interrupts across all console operations
* 13 March 2001, Andrew Morton
#include <linux/mutex.h>
#include <linux/vt_kern.h>
#include <linux/selection.h>
+#include <linux/smp_lock.h>
#include <linux/tiocl.h>
#include <linux/kbd_kern.h>
#include <linux/consolemap.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
-#include <linux/bootmem.h>
#include <linux/pm.h>
#include <linux/font.h>
#include <linux/bitops.h>
#include <linux/notifier.h>
-
-#include <asm/io.h>
+#include <linux/device.h>
+#include <linux/io.h>
#include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#define MAX_NR_CON_DRIVER 16
int console_blanked;
static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
-static int blankinterval = 10*60*HZ;
static int vesa_off_interval;
+static int blankinterval = 10*60;
+core_param(consoleblank, blankinterval, int, 0444);
static DECLARE_WORK(console_work, console_callback);
struct vt_notifier_param param = { .vc = vc };
atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
}
-
/*
* Low-Level Functions
*/
#ifdef VT_BUF_VRAM_ONLY
#define DO_UPDATE(vc) 0
#else
-#define DO_UPDATE(vc) CON_IS_VISIBLE(vc)
+#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked)
#endif
static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed)
d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr));
scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
- scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_scrl_erase_char,
+ scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char,
vc->vc_size_row * nr);
}
s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t);
step = vc->vc_cols * nr;
scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row);
- scr_memsetw(s, vc->vc_scrl_erase_char, 2 * step);
+ scr_memsetw(s, vc->vc_video_erase_char, 2 * step);
}
static void do_update_region(struct vc_data *vc, unsigned long start, int count)
vc->vc_blink, vc->vc_underline,
vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic);
vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' ';
- vc->vc_scrl_erase_char = (build_attr(vc, vc->vc_def_color, 1, false, false, vc->vc_decscnm, false) << 8) | ' ';
}
/* Note: inverting the screen twice should revert to the original state */
visual_init(vc, currcons, 1);
if (!*vc->vc_uni_pagedir_loc)
con_set_default_unimap(vc);
- if (!vc->vc_kmalloced)
- vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
+ vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
if (!vc->vc_screenbuf) {
kfree(vc);
vc_cons[currcons].d = NULL;
return -ENOMEM;
}
- vc->vc_kmalloced = 1;
vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
+ vcs_make_sysfs(currcons);
atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
}
return 0;
*/
#define VC_RESIZE_MAXCOL (32767)
#define VC_RESIZE_MAXROW (32767)
-int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
+
+/**
+ * vc_do_resize - resizing method for the tty
+ * @tty: tty being resized
+ * @real_tty: real tty (different to tty if a pty/tty pair)
+ * @vc: virtual console private data
+ * @cols: columns
+ * @lines: lines
+ *
+ * Resize a virtual console, clipping according to the actual constraints.
+ * If the caller passes a tty structure then update the termios winsize
+ * information and perform any neccessary signal handling.
+ *
+ * Caller must hold the console semaphore. Takes the termios mutex and
+ * ctrl_lock of the tty IFF a tty is passed.
+ */
+
+static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
+ unsigned int cols, unsigned int lines)
{
unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
unsigned int old_cols, old_rows, old_row_size, old_screen_size;
if (new_scr_end > new_origin)
scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
new_scr_end - new_origin);
- if (vc->vc_kmalloced)
- kfree(vc->vc_screenbuf);
+ kfree(vc->vc_screenbuf);
vc->vc_screenbuf = newscreen;
- vc->vc_kmalloced = 1;
vc->vc_screenbuf_size = new_screen_size;
set_origin(vc);
gotoxy(vc, vc->vc_x, vc->vc_y);
save_cur(vc);
- if (vc->vc_tty) {
- struct winsize ws, *cws = &vc->vc_tty->winsize;
- unsigned long flags;
-
+ if (tty) {
+ /* Rewrite the requested winsize data with the actual
+ resulting sizes */
+ struct winsize ws;
memset(&ws, 0, sizeof(ws));
ws.ws_row = vc->vc_rows;
ws.ws_col = vc->vc_cols;
ws.ws_ypixel = vc->vc_scan_lines;
-
- mutex_lock(&vc->vc_tty->termios_mutex);
- spin_lock_irqsave(&vc->vc_tty->ctrl_lock, flags);
- if ((ws.ws_row != cws->ws_row || ws.ws_col != cws->ws_col) &&
- vc->vc_tty->pgrp)
- kill_pgrp(vc->vc_tty->pgrp, SIGWINCH, 1);
- spin_unlock_irqrestore(&vc->vc_tty->ctrl_lock, flags);
- *cws = ws;
- mutex_unlock(&vc->vc_tty->termios_mutex);
+ tty_do_resize(tty, &ws);
}
if (CON_IS_VISIBLE(vc))
update_screen(vc);
+ vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
return err;
}
-int vc_lock_resize(struct vc_data *vc, unsigned int cols, unsigned int lines)
+/**
+ * vc_resize - resize a VT
+ * @vc: virtual console
+ * @cols: columns
+ * @rows: rows
+ *
+ * Resize a virtual console as seen from the console end of things. We
+ * use the common vc_do_resize methods to update the structures. The
+ * caller must hold the console sem to protect console internals and
+ * vc->vc_tty
+ */
+
+int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
{
- int rc;
+ return vc_do_resize(vc->vc_tty, vc, cols, rows);
+}
+
+/**
+ * vt_resize - resize a VT
+ * @tty: tty to resize
+ * @ws: winsize attributes
+ *
+ * Resize a virtual terminal. This is called by the tty layer as we
+ * register our own handler for resizing. The mutual helper does all
+ * the actual work.
+ *
+ * Takes the console sem and the called methods then take the tty
+ * termios_mutex and the tty ctrl_lock in that order.
+ */
+static int vt_resize(struct tty_struct *tty, struct winsize *ws)
+{
+ struct vc_data *vc = tty->driver_data;
+ int ret;
acquire_console_sem();
- rc = vc_resize(vc, cols, lines);
+ ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
release_console_sem();
- return rc;
+ return ret;
}
void vc_deallocate(unsigned int currcons)
if (vc_cons_allocated(currcons)) {
struct vc_data *vc = vc_cons[currcons].d;
struct vt_notifier_param param = { .vc = vc };
+
atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
+ vcs_remove_sysfs(currcons);
vc->vc_sw->con_deinit(vc);
put_pid(vc->vt_pid);
module_put(vc->vc_sw->owner);
- if (vc->vc_kmalloced)
- kfree(vc->vc_screenbuf);
+ kfree(vc->vc_screenbuf);
if (currcons >= MIN_NR_CONSOLES)
kfree(vc);
vc_cons[currcons].d = NULL;
update_attr(vc);
break;
case 9: /* set blanking interval */
- blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
+ blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
poke_blanked_console();
break;
case 10: /* set bell frequency in Hz */
vc->vc_tab_stop[1] =
vc->vc_tab_stop[2] =
vc->vc_tab_stop[3] =
- vc->vc_tab_stop[4] = 0x01010101;
+ vc->vc_tab_stop[4] =
+ vc->vc_tab_stop[5] =
+ vc->vc_tab_stop[6] =
+ vc->vc_tab_stop[7] = 0x01010101;
vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
vc->vc_bell_duration = DEFAULT_BELL_DURATION;
vc->vc_tab_stop[1] =
vc->vc_tab_stop[2] =
vc->vc_tab_stop[3] =
- vc->vc_tab_stop[4] = 0;
+ vc->vc_tab_stop[4] =
+ vc->vc_tab_stop[5] =
+ vc->vc_tab_stop[6] =
+ vc->vc_tab_stop[7] = 0;
}
return;
case 'm':
currcons = vc->vc_num;
if (!vc_cons_allocated(currcons)) {
/* could this happen? */
- static int error = 0;
- if (!error) {
- error = 1;
- printk("con_write: tty %d not allocated\n", currcons+1);
- }
+ printk_once("con_write: tty %d not allocated\n", currcons+1);
release_console_sem();
return 0;
}
- release_console_sem();
-
orig_buf = buf;
orig_count = count;
- /* At this point 'buf' is guaranteed to be a kernel buffer
- * and therefore no access to userspace (and therefore sleeping)
- * will be needed. The con_buf_mtx serializes all tty based
- * console rendering and vcs write/read operations. We hold
- * the console spinlock during the entire write.
- */
-
- acquire_console_sem();
-
- vc = tty->driver_data;
- if (vc == NULL) {
- printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
- release_console_sem();
- goto out;
- }
-
himask = vc->vc_hi_font_mask;
charmask = himask ? 0x1ff : 0xff;
c = 0xfffd;
tc = c;
} else { /* no utf or alternate charset mode */
- tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
+ tc = vc_translate(vc, c);
}
param.c = tc;
FLUSH
console_conditional_schedule();
release_console_sem();
-
-out:
notify_update(vc);
return n;
#undef FLUSH
int lines;
int ret;
- if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
- return -EINVAL;
if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(type, p))
{
if (tty->stopped)
return 0;
- return 4096; /* No limit, really; we're not buffering */
+ return 32768; /* No limit, really; we're not buffering */
}
static int con_chars_in_buffer(struct tty_struct *tty)
ret = vc_allocate(currcons);
if (ret == 0) {
struct vc_data *vc = vc_cons[currcons].d;
+
+ /* Still being freed */
+ if (vc->vc_tty) {
+ release_console_sem();
+ return -ERESTARTSYS;
+ }
tty->driver_data = vc;
vc->vc_tty = tty;
else
tty->termios->c_iflag &= ~IUTF8;
release_console_sem();
- vcs_make_sysfs(tty);
return ret;
}
}
return ret;
}
-/*
- * We take tty_mutex in here to prevent another thread from coming in via init_dev
- * and taking a ref against the tty while we're in the process of forgetting
- * about it and cleaning things up.
- *
- * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
- */
static void con_close(struct tty_struct *tty, struct file *filp)
{
- mutex_lock(&tty_mutex);
- acquire_console_sem();
- if (tty && tty->count == 1) {
- struct vc_data *vc = tty->driver_data;
+ /* Nothing to do - we defer to shutdown */
+}
- if (vc)
- vc->vc_tty = NULL;
- tty->driver_data = NULL;
- release_console_sem();
- vcs_remove_sysfs(tty);
- mutex_unlock(&tty_mutex);
- /*
- * tty_mutex is released, but we still hold BKL, so there is
- * still exclusion against init_dev()
- */
- return;
- }
+static void con_shutdown(struct tty_struct *tty)
+{
+ struct vc_data *vc = tty->driver_data;
+ BUG_ON(vc == NULL);
+ acquire_console_sem();
+ vc->vc_tty = NULL;
release_console_sem();
- mutex_unlock(&tty_mutex);
+ tty_shutdown(tty);
}
static int default_italic_color = 2; // green (ASCII)
if (blankinterval) {
blank_state = blank_normal_wait;
- mod_timer(&console_timer, jiffies + blankinterval);
+ mod_timer(&console_timer, jiffies + (blankinterval * HZ));
}
- /*
- * kmalloc is not running yet - we use the bootmem allocator.
- */
for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
- vc_cons[currcons].d = vc = alloc_bootmem(sizeof(struct vc_data));
+ vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
visual_init(vc, currcons, 1);
- vc->vc_screenbuf = (unsigned short *)alloc_bootmem(vc->vc_screenbuf_size);
- vc->vc_kmalloced = 0;
+ vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
vc_init(vc, vc->vc_rows, vc->vc_cols,
currcons || !vc->vc_sw->con_save_screen);
}
.flush_chars = con_flush_chars,
.chars_in_buffer = con_chars_in_buffer,
.ioctl = vt_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = vt_compat_ioctl,
+#endif
.stop = con_stop,
.start = con_start,
.throttle = con_throttle,
.unthrottle = con_unthrottle,
+ .resize = vt_resize,
+ .shutdown = con_shutdown
};
-int __init vty_init(void)
+static struct cdev vc0_cdev;
+
+int __init vty_init(const struct file_operations *console_fops)
{
+ cdev_init(&vc0_cdev, console_fops);
+ 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");
+ device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
+
vcs_init();
console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
tty_set_operations(console_driver, &con_ops);
if (tty_register_driver(console_driver))
panic("Couldn't register console driver\n");
-
kbd_init();
console_map_init();
-#ifdef CONFIG_PROM_CONSOLE
- prom_con_init();
-#endif
#ifdef CONFIG_MDA_CONSOLE
mda_console_init();
#endif
}
#ifndef VT_SINGLE_DRIVER
-#include <linux/device.h>
static struct class *vtconsole_class;
goto err;
con_driver->dev = device_create(vtconsole_class, NULL,
- MKDEV(0, con_driver->node),
- "vtcon%i", con_driver->node);
+ MKDEV(0, con_driver->node),
+ NULL, "vtcon%i",
+ con_driver->node);
if (IS_ERR(con_driver->dev)) {
printk(KERN_WARNING "Unable to create device for %s; "
if (con->con && !con->dev) {
con->dev = device_create(vtconsole_class, NULL,
- MKDEV(0, con->node),
- "vtcon%i", con->node);
+ MKDEV(0, con->node),
+ NULL, "vtcon%i",
+ con->node);
if (IS_ERR(con->dev)) {
printk(KERN_WARNING "Unable to create "
blank_state = blank_vesa_wait;
mod_timer(&console_timer, jiffies + vesa_off_interval);
}
+ vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
}
EXPORT_SYMBOL(do_blank_screen);
return; /* but leave console_blanked != 0 */
if (blankinterval) {
- mod_timer(&console_timer, jiffies + blankinterval);
+ mod_timer(&console_timer, jiffies + (blankinterval * HZ));
blank_state = blank_normal_wait;
}
console_blank_hook(0);
set_palette(vc);
set_cursor(vc);
+ vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
}
EXPORT_SYMBOL(do_unblank_screen);
static void blank_screen_t(unsigned long dummy)
{
if (unlikely(!keventd_up())) {
- mod_timer(&console_timer, jiffies + blankinterval);
+ mod_timer(&console_timer, jiffies + (blankinterval * HZ));
return;
}
blank_timer_expired = 1;
if (console_blanked)
unblank_screen();
else if (blankinterval) {
- mod_timer(&console_timer, jiffies + blankinterval);
+ mod_timer(&console_timer, jiffies + (blankinterval * HZ));
blank_state = blank_normal_wait;
}
}
EXPORT_SYMBOL(update_region);
EXPORT_SYMBOL(redraw_screen);
EXPORT_SYMBOL(vc_resize);
-EXPORT_SYMBOL(vc_lock_resize);
EXPORT_SYMBOL(fg_console);
EXPORT_SYMBOL(console_blank_hook);
EXPORT_SYMBOL(console_blanked);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff