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freebsd-dev/sys/dev/vt/vt_core.c
Greg V c937a405bd vt: call driver's postswitch when panicking on ttyv0 
In vt_kms, the postswitch callback restores fbdev mode when
panicking or entering the debugger. This ensures that even when
a graphical applicatino was running on the first tty, simple framebuffer
mode would be restored and the panic would be visible instead
of the frozen GUI. But vt wouldn't call the postswitch callback
when we're already on the first tty, so running a GUI on it
would prevent you from reading any panics.

Reviewed by:	tsoome
MFC after:	2 weeks
Differential Revision: https://reviews.freebsd.org/D29961
2021-09-20 20:29:37 +03:00

3180 lines
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2009, 2013 The FreeBSD Foundation
*
* This software was developed by Ed Schouten under sponsorship from the
* FreeBSD Foundation.
*
* Portions of this software were developed by Oleksandr Rybalko
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/consio.h>
#include <sys/eventhandler.h>
#include <sys/fbio.h>
#include <sys/font.h>
#include <sys/kbio.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/power.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/random.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <sys/terminal.h>
#include <dev/kbd/kbdreg.h>
#include <dev/vt/vt.h>
#if defined(__i386__) || defined(__amd64__)
#include <machine/psl.h>
#include <machine/frame.h>
#endif
static int vtterm_cngrab_noswitch(struct vt_device *, struct vt_window *);
static int vtterm_cnungrab_noswitch(struct vt_device *, struct vt_window *);
static tc_bell_t vtterm_bell;
static tc_cursor_t vtterm_cursor;
static tc_putchar_t vtterm_putchar;
static tc_fill_t vtterm_fill;
static tc_copy_t vtterm_copy;
static tc_pre_input_t vtterm_pre_input;
static tc_post_input_t vtterm_post_input;
static tc_param_t vtterm_param;
static tc_done_t vtterm_done;
static tc_cnprobe_t vtterm_cnprobe;
static tc_cngetc_t vtterm_cngetc;
static tc_cngrab_t vtterm_cngrab;
static tc_cnungrab_t vtterm_cnungrab;
static tc_opened_t vtterm_opened;
static tc_ioctl_t vtterm_ioctl;
static tc_mmap_t vtterm_mmap;
const struct terminal_class vt_termclass = {
.tc_bell = vtterm_bell,
.tc_cursor = vtterm_cursor,
.tc_putchar = vtterm_putchar,
.tc_fill = vtterm_fill,
.tc_copy = vtterm_copy,
.tc_pre_input = vtterm_pre_input,
.tc_post_input = vtterm_post_input,
.tc_param = vtterm_param,
.tc_done = vtterm_done,
.tc_cnprobe = vtterm_cnprobe,
.tc_cngetc = vtterm_cngetc,
.tc_cngrab = vtterm_cngrab,
.tc_cnungrab = vtterm_cnungrab,
.tc_opened = vtterm_opened,
.tc_ioctl = vtterm_ioctl,
.tc_mmap = vtterm_mmap,
};
/*
* Use a constant timer of 25 Hz to redraw the screen.
*
* XXX: In theory we should only fire up the timer when there is really
* activity. Unfortunately we cannot always start timers. We really
* don't want to process kernel messages synchronously, because it
* really slows down the system.
*/
#define VT_TIMERFREQ 25
/* Bell pitch/duration. */
#define VT_BELLDURATION ((5 * hz + 99) / 100)
#define VT_BELLPITCH 800
#define VT_UNIT(vw) ((vw)->vw_device->vd_unit * VT_MAXWINDOWS + \
(vw)->vw_number)
static SYSCTL_NODE(_kern, OID_AUTO, vt, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"vt(9) parameters");
static VT_SYSCTL_INT(enable_altgr, 1, "Enable AltGr key (Do not assume R.Alt as Alt)");
static VT_SYSCTL_INT(enable_bell, 1, "Enable bell");
static VT_SYSCTL_INT(debug, 0, "vt(9) debug level");
static VT_SYSCTL_INT(deadtimer, 15, "Time to wait busy process in VT_PROCESS mode");
static VT_SYSCTL_INT(suspendswitch, 1, "Switch to VT0 before suspend");
/* Allow to disable some keyboard combinations. */
static VT_SYSCTL_INT(kbd_halt, 1, "Enable halt keyboard combination. "
"See kbdmap(5) to configure.");
static VT_SYSCTL_INT(kbd_poweroff, 1, "Enable Power Off keyboard combination. "
"See kbdmap(5) to configure.");
static VT_SYSCTL_INT(kbd_reboot, 1, "Enable reboot keyboard combination. "
"See kbdmap(5) to configure (typically Ctrl-Alt-Delete).");
static VT_SYSCTL_INT(kbd_debug, 1, "Enable key combination to enter debugger. "
"See kbdmap(5) to configure (typically Ctrl-Alt-Esc).");
static VT_SYSCTL_INT(kbd_panic, 0, "Enable request to panic. "
"See kbdmap(5) to configure.");
/* Used internally, not a tunable. */
int vt_draw_logo_cpus;
VT_SYSCTL_INT(splash_cpu, 0, "Show logo CPUs during boot");
VT_SYSCTL_INT(splash_ncpu, 0, "Override number of logos displayed "
"(0 = do not override)");
VT_SYSCTL_INT(splash_cpu_style, 2, "Draw logo style "
"(0 = Alternate beastie, 1 = Beastie, 2 = Orb)");
VT_SYSCTL_INT(splash_cpu_duration, 10, "Hide logos after (seconds)");
static unsigned int vt_unit = 0;
static MALLOC_DEFINE(M_VT, "vt", "vt device");
struct vt_device *main_vd = &vt_consdev;
/* Boot logo. */
extern unsigned int vt_logo_width;
extern unsigned int vt_logo_height;
extern unsigned int vt_logo_depth;
extern unsigned char vt_logo_image[];
#ifndef DEV_SPLASH
#define vtterm_draw_cpu_logos(...) do {} while (0)
const unsigned int vt_logo_sprite_height;
#endif
/*
* Console font. vt_font_loader will be filled with font data passed
* by loader. If there is no font passed by boot loader, we use built in
* default.
*/
extern struct vt_font vt_font_default;
static struct vt_font vt_font_loader;
static struct vt_font *vt_font_assigned = &vt_font_default;
#ifndef SC_NO_CUTPASTE
extern struct vt_mouse_cursor vt_default_mouse_pointer;
#endif
static int signal_vt_rel(struct vt_window *);
static int signal_vt_acq(struct vt_window *);
static int finish_vt_rel(struct vt_window *, int, int *);
static int finish_vt_acq(struct vt_window *);
static int vt_window_switch(struct vt_window *);
static int vt_late_window_switch(struct vt_window *);
static int vt_proc_alive(struct vt_window *);
static void vt_resize(struct vt_device *);
static void vt_update_static(void *);
#ifndef SC_NO_CUTPASTE
static void vt_mouse_paste(void);
#endif
static void vt_suspend_handler(void *priv);
static void vt_resume_handler(void *priv);
SET_DECLARE(vt_drv_set, struct vt_driver);
#define _VTDEFH MAX(100, PIXEL_HEIGHT(VT_FB_MAX_HEIGHT))
#define _VTDEFW MAX(200, PIXEL_WIDTH(VT_FB_MAX_WIDTH))
struct terminal vt_consterm;
static struct vt_window vt_conswindow;
#ifndef SC_NO_CONSDRAWN
static term_char_t vt_consdrawn[PIXEL_HEIGHT(VT_FB_MAX_HEIGHT) * PIXEL_WIDTH(VT_FB_MAX_WIDTH)];
static term_color_t vt_consdrawnfg[PIXEL_HEIGHT(VT_FB_MAX_HEIGHT) * PIXEL_WIDTH(VT_FB_MAX_WIDTH)];
static term_color_t vt_consdrawnbg[PIXEL_HEIGHT(VT_FB_MAX_HEIGHT) * PIXEL_WIDTH(VT_FB_MAX_WIDTH)];
#endif
struct vt_device vt_consdev = {
.vd_driver = NULL,
.vd_softc = NULL,
.vd_prev_driver = NULL,
.vd_prev_softc = NULL,
.vd_flags = VDF_INVALID,
.vd_windows = { [VT_CONSWINDOW] = &vt_conswindow, },
.vd_curwindow = &vt_conswindow,
.vd_kbstate = 0,
#ifndef SC_NO_CUTPASTE
.vd_pastebuf = {
.vpb_buf = NULL,
.vpb_bufsz = 0,
.vpb_len = 0
},
.vd_mcursor = &vt_default_mouse_pointer,
.vd_mcursor_fg = TC_WHITE,
.vd_mcursor_bg = TC_BLACK,
#endif
#ifndef SC_NO_CONSDRAWN
.vd_drawn = vt_consdrawn,
.vd_drawnfg = vt_consdrawnfg,
.vd_drawnbg = vt_consdrawnbg,
#endif
};
static term_char_t vt_constextbuf[(_VTDEFW) * (VBF_DEFAULT_HISTORY_SIZE)];
static term_char_t *vt_constextbufrows[VBF_DEFAULT_HISTORY_SIZE];
static struct vt_window vt_conswindow = {
.vw_number = VT_CONSWINDOW,
.vw_flags = VWF_CONSOLE,
.vw_buf = {
.vb_buffer = &vt_constextbuf[0],
.vb_rows = &vt_constextbufrows[0],
.vb_history_size = VBF_DEFAULT_HISTORY_SIZE,
.vb_curroffset = 0,
.vb_roffset = 0,
.vb_flags = VBF_STATIC,
.vb_mark_start = {.tp_row = 0, .tp_col = 0,},
.vb_mark_end = {.tp_row = 0, .tp_col = 0,},
.vb_scr_size = {
.tp_row = _VTDEFH,
.tp_col = _VTDEFW,
},
},
.vw_device = &vt_consdev,
.vw_terminal = &vt_consterm,
.vw_kbdmode = K_XLATE,
.vw_grabbed = 0,
};
struct terminal vt_consterm = {
.tm_class = &vt_termclass,
.tm_softc = &vt_conswindow,
.tm_flags = TF_CONS,
};
static struct consdev vt_consterm_consdev = {
.cn_ops = &termcn_cnops,
.cn_arg = &vt_consterm,
.cn_name = "ttyv0",
};
/* Add to set of consoles. */
DATA_SET(cons_set, vt_consterm_consdev);
/*
* Right after kmem is done to allow early drivers to use locking and allocate
* memory.
*/
SYSINIT(vt_update_static, SI_SUB_KMEM, SI_ORDER_ANY, vt_update_static,
&vt_consdev);
/* Delay until all devices attached, to not waste time. */
SYSINIT(vt_early_cons, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, vt_upgrade,
&vt_consdev);
/* Initialize locks/mem depended members. */
static void
vt_update_static(void *dummy)
{
if (!vty_enabled(VTY_VT))
return;
if (main_vd->vd_driver != NULL)
printf("VT(%s): %s %ux%u\n", main_vd->vd_driver->vd_name,
(main_vd->vd_flags & VDF_TEXTMODE) ? "text" : "resolution",
main_vd->vd_width, main_vd->vd_height);
else
printf("VT: init without driver.\n");
mtx_init(&main_vd->vd_lock, "vtdev", NULL, MTX_DEF);
cv_init(&main_vd->vd_winswitch, "vtwswt");
}
static void
vt_schedule_flush(struct vt_device *vd, int ms)
{
if (ms <= 0)
/* Default to initial value. */
ms = 1000 / VT_TIMERFREQ;
callout_schedule(&vd->vd_timer, hz / (1000 / ms));
}
void
vt_resume_flush_timer(struct vt_window *vw, int ms)
{
struct vt_device *vd = vw->vw_device;
if (vd->vd_curwindow != vw)
return;
if (!(vd->vd_flags & VDF_ASYNC) ||
!atomic_cmpset_int(&vd->vd_timer_armed, 0, 1))
return;
vt_schedule_flush(vd, ms);
}
static void
vt_suspend_flush_timer(struct vt_device *vd)
{
/*
* As long as this function is called locked, callout_stop()
* has the same effect like callout_drain() with regard to
* preventing the callback function from executing.
*/
VT_LOCK_ASSERT(vd, MA_OWNED);
if (!(vd->vd_flags & VDF_ASYNC) ||
!atomic_cmpset_int(&vd->vd_timer_armed, 1, 0))
return;
callout_stop(&vd->vd_timer);
}
static void
vt_switch_timer(void *arg)
{
(void)vt_late_window_switch((struct vt_window *)arg);
}
static int
vt_save_kbd_mode(struct vt_window *vw, keyboard_t *kbd)
{
int mode, ret;
mode = 0;
ret = kbdd_ioctl(kbd, KDGKBMODE, (caddr_t)&mode);
if (ret == ENOIOCTL)
ret = ENODEV;
if (ret != 0)
return (ret);
vw->vw_kbdmode = mode;
return (0);
}
static int
vt_update_kbd_mode(struct vt_window *vw, keyboard_t *kbd)
{
int ret;
ret = kbdd_ioctl(kbd, KDSKBMODE, (caddr_t)&vw->vw_kbdmode);
if (ret == ENOIOCTL)
ret = ENODEV;
return (ret);
}
static int
vt_save_kbd_state(struct vt_window *vw, keyboard_t *kbd)
{
int state, ret;
state = 0;
ret = kbdd_ioctl(kbd, KDGKBSTATE, (caddr_t)&state);
if (ret == ENOIOCTL)
ret = ENODEV;
if (ret != 0)
return (ret);
vw->vw_kbdstate &= ~LOCK_MASK;
vw->vw_kbdstate |= state & LOCK_MASK;
return (0);
}
static int
vt_update_kbd_state(struct vt_window *vw, keyboard_t *kbd)
{
int state, ret;
state = vw->vw_kbdstate & LOCK_MASK;
ret = kbdd_ioctl(kbd, KDSKBSTATE, (caddr_t)&state);
if (ret == ENOIOCTL)
ret = ENODEV;
return (ret);
}
static int
vt_save_kbd_leds(struct vt_window *vw, keyboard_t *kbd)
{
int leds, ret;
leds = 0;
ret = kbdd_ioctl(kbd, KDGETLED, (caddr_t)&leds);
if (ret == ENOIOCTL)
ret = ENODEV;
if (ret != 0)
return (ret);
vw->vw_kbdstate &= ~LED_MASK;
vw->vw_kbdstate |= leds & LED_MASK;
return (0);
}
static int
vt_update_kbd_leds(struct vt_window *vw, keyboard_t *kbd)
{
int leds, ret;
leds = vw->vw_kbdstate & LED_MASK;
ret = kbdd_ioctl(kbd, KDSETLED, (caddr_t)&leds);
if (ret == ENOIOCTL)
ret = ENODEV;
return (ret);
}
static int
vt_window_preswitch(struct vt_window *vw, struct vt_window *curvw)
{
DPRINTF(40, "%s\n", __func__);
curvw->vw_switch_to = vw;
/* Set timer to allow switch in case when process hang. */
callout_reset(&vw->vw_proc_dead_timer, hz * vt_deadtimer,
vt_switch_timer, (void *)vw);
/* Notify process about vt switch attempt. */
DPRINTF(30, "%s: Notify process.\n", __func__);
signal_vt_rel(curvw);
return (0);
}
static int
vt_window_postswitch(struct vt_window *vw)
{
signal_vt_acq(vw);
return (0);
}
/* vt_late_window_switch will do VT switching for regular case. */
static int
vt_late_window_switch(struct vt_window *vw)
{
struct vt_window *curvw;
int ret;
callout_stop(&vw->vw_proc_dead_timer);
ret = vt_window_switch(vw);
if (ret != 0) {
/*
* If the switch hasn't happened, then return the VT
* to the current owner, if any.
*/
curvw = vw->vw_device->vd_curwindow;
if (curvw->vw_smode.mode == VT_PROCESS)
(void)vt_window_postswitch(curvw);
return (ret);
}
/* Notify owner process about terminal availability. */
if (vw->vw_smode.mode == VT_PROCESS) {
ret = vt_window_postswitch(vw);
}
return (ret);
}
/* Switch window. */
static int
vt_proc_window_switch(struct vt_window *vw)
{
struct vt_window *curvw;
struct vt_device *vd;
int ret;
/* Prevent switching to NULL */
if (vw == NULL) {
DPRINTF(30, "%s: Cannot switch: vw is NULL.", __func__);
return (EINVAL);
}
vd = vw->vw_device;
curvw = vd->vd_curwindow;
/* Check if virtual terminal is locked */
if (curvw->vw_flags & VWF_VTYLOCK)
return (EBUSY);
/* Check if switch already in progress */
if (curvw->vw_flags & VWF_SWWAIT_REL) {
/* Check if switching to same window */
if (curvw->vw_switch_to == vw) {
DPRINTF(30, "%s: Switch in progress to same vw.", __func__);
return (0); /* success */
}
DPRINTF(30, "%s: Switch in progress to different vw.", __func__);
return (EBUSY);
}
/* Avoid switching to already selected window */
if (vw == curvw) {
DPRINTF(30, "%s: Cannot switch: vw == curvw.", __func__);
return (0); /* success */
}
/*
* Early check for an attempt to switch to a non-functional VT.
* The same check is done in vt_window_switch(), but it's better
* to fail as early as possible to avoid needless pre-switch
* actions.
*/
VT_LOCK(vd);
if ((vw->vw_flags & (VWF_OPENED|VWF_CONSOLE)) == 0) {
VT_UNLOCK(vd);
return (EINVAL);
}
VT_UNLOCK(vd);
/* Ask current process permission to switch away. */
if (curvw->vw_smode.mode == VT_PROCESS) {
DPRINTF(30, "%s: VT_PROCESS ", __func__);
if (vt_proc_alive(curvw) == FALSE) {
DPRINTF(30, "Dead. Cleaning.");
/* Dead */
} else {
DPRINTF(30, "%s: Signaling process.\n", __func__);
/* Alive, try to ask him. */
ret = vt_window_preswitch(vw, curvw);
/* Wait for process answer or timeout. */
return (ret);
}
DPRINTF(30, "\n");
}
ret = vt_late_window_switch(vw);
return (ret);
}
/* Switch window ignoring process locking. */
static int
vt_window_switch(struct vt_window *vw)
{
struct vt_device *vd = vw->vw_device;
struct vt_window *curvw = vd->vd_curwindow;
keyboard_t *kbd;
if (kdb_active) {
/*
* When grabbing the console for the debugger, avoid
* locks as that can result in deadlock. While this
* could use try locks, that wouldn't really make a
* difference as there are sufficient barriers in
* debugger entry/exit to be equivalent to
* successfully try-locking here.
*/
if (curvw == vw)
return (0);
if (!(vw->vw_flags & (VWF_OPENED|VWF_CONSOLE)))
return (EINVAL);
vd->vd_curwindow = vw;
vd->vd_flags |= VDF_INVALID;
if (vd->vd_driver->vd_postswitch)
vd->vd_driver->vd_postswitch(vd);
return (0);
}
VT_LOCK(vd);
if (curvw == vw) {
/*
* Nothing to do, except ensure the driver has the opportunity to
* switch to console mode when panicking, making sure the panic
* is readable (even when a GUI was using ttyv0).
*/
if ((kdb_active || panicstr) && vd->vd_driver->vd_postswitch)
vd->vd_driver->vd_postswitch(vd);
VT_UNLOCK(vd);
return (0);
}
if (!(vw->vw_flags & (VWF_OPENED|VWF_CONSOLE))) {
VT_UNLOCK(vd);
return (EINVAL);
}
vt_suspend_flush_timer(vd);
vd->vd_curwindow = vw;
vd->vd_flags |= VDF_INVALID;
cv_broadcast(&vd->vd_winswitch);
VT_UNLOCK(vd);
if (vd->vd_driver->vd_postswitch)
vd->vd_driver->vd_postswitch(vd);
vt_resume_flush_timer(vw, 0);
/* Restore per-window keyboard mode. */
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL) {
if (curvw->vw_kbdmode == K_XLATE)
vt_save_kbd_state(curvw, kbd);
vt_update_kbd_mode(vw, kbd);
vt_update_kbd_state(vw, kbd);
}
mtx_unlock(&Giant);
DPRINTF(10, "%s(ttyv%d) done\n", __func__, vw->vw_number);
return (0);
}
void
vt_termsize(struct vt_device *vd, struct vt_font *vf, term_pos_t *size)
{
size->tp_row = vd->vd_height;
if (vt_draw_logo_cpus)
size->tp_row -= vt_logo_sprite_height;
size->tp_col = vd->vd_width;
if (vf != NULL) {
size->tp_row = MIN(size->tp_row / vf->vf_height,
PIXEL_HEIGHT(VT_FB_MAX_HEIGHT));
size->tp_col = MIN(size->tp_col / vf->vf_width,
PIXEL_WIDTH(VT_FB_MAX_WIDTH));
}
}
static inline void
vt_termrect(struct vt_device *vd, struct vt_font *vf, term_rect_t *rect)
{
rect->tr_begin.tp_row = rect->tr_begin.tp_col = 0;
if (vt_draw_logo_cpus)
rect->tr_begin.tp_row = vt_logo_sprite_height;
rect->tr_end.tp_row = vd->vd_height;
rect->tr_end.tp_col = vd->vd_width;
if (vf != NULL) {
rect->tr_begin.tp_row =
howmany(rect->tr_begin.tp_row, vf->vf_height);
rect->tr_end.tp_row = MIN(rect->tr_end.tp_row / vf->vf_height,
PIXEL_HEIGHT(VT_FB_MAX_HEIGHT));
rect->tr_end.tp_col = MIN(rect->tr_end.tp_col / vf->vf_width,
PIXEL_WIDTH(VT_FB_MAX_WIDTH));
}
}
void
vt_winsize(struct vt_device *vd, struct vt_font *vf, struct winsize *size)
{
size->ws_ypixel = vd->vd_height;
if (vt_draw_logo_cpus)
size->ws_ypixel -= vt_logo_sprite_height;
size->ws_row = size->ws_ypixel;
size->ws_col = size->ws_xpixel = vd->vd_width;
if (vf != NULL) {
size->ws_row = MIN(size->ws_row / vf->vf_height,
PIXEL_HEIGHT(VT_FB_MAX_HEIGHT));
size->ws_col = MIN(size->ws_col / vf->vf_width,
PIXEL_WIDTH(VT_FB_MAX_WIDTH));
}
}
void
vt_compute_drawable_area(struct vt_window *vw)
{
struct vt_device *vd;
struct vt_font *vf;
vt_axis_t height;
vd = vw->vw_device;
if (vw->vw_font == NULL) {
vw->vw_draw_area.tr_begin.tp_col = 0;
vw->vw_draw_area.tr_begin.tp_row = 0;
if (vt_draw_logo_cpus)
vw->vw_draw_area.tr_begin.tp_row = vt_logo_sprite_height;
vw->vw_draw_area.tr_end.tp_col = vd->vd_width;
vw->vw_draw_area.tr_end.tp_row = vd->vd_height;
return;
}
vf = vw->vw_font;
/*
* Compute the drawable area, so that the text is centered on
* the screen.
*/
height = vd->vd_height;
if (vt_draw_logo_cpus)
height -= vt_logo_sprite_height;
vw->vw_draw_area.tr_begin.tp_col = (vd->vd_width % vf->vf_width) / 2;
vw->vw_draw_area.tr_begin.tp_row = (height % vf->vf_height) / 2;
if (vt_draw_logo_cpus)
vw->vw_draw_area.tr_begin.tp_row += vt_logo_sprite_height;
vw->vw_draw_area.tr_end.tp_col = vw->vw_draw_area.tr_begin.tp_col +
rounddown(vd->vd_width, vf->vf_width);
vw->vw_draw_area.tr_end.tp_row = vw->vw_draw_area.tr_begin.tp_row +
rounddown(height, vf->vf_height);
}
static void
vt_scroll(struct vt_window *vw, int offset, int whence)
{
int diff;
term_pos_t size;
if ((vw->vw_flags & VWF_SCROLL) == 0)
return;
vt_termsize(vw->vw_device, vw->vw_font, &size);
diff = vthistory_seek(&vw->vw_buf, offset, whence);
if (diff)
vw->vw_device->vd_flags |= VDF_INVALID;
vt_resume_flush_timer(vw, 0);
}
static int
vt_machine_kbdevent(struct vt_device *vd, int c)
{
switch (c) {
case SPCLKEY | DBG: /* kbdmap(5) keyword `debug`. */
if (vt_kbd_debug) {
kdb_enter(KDB_WHY_BREAK, "manual escape to debugger");
#if VT_ALT_TO_ESC_HACK
/*
* There's an unfortunate conflict between SPCLKEY|DBG
* and VT_ALT_TO_ESC_HACK. Just assume they didn't mean
* it if we got to here.
*/
vd->vd_kbstate &= ~ALKED;
#endif
}
return (1);
case SPCLKEY | HALT: /* kbdmap(5) keyword `halt`. */
if (vt_kbd_halt)
shutdown_nice(RB_HALT);
return (1);
case SPCLKEY | PASTE: /* kbdmap(5) keyword `paste`. */
#ifndef SC_NO_CUTPASTE
/* Insert text from cut-paste buffer. */
vt_mouse_paste();
#endif
break;
case SPCLKEY | PDWN: /* kbdmap(5) keyword `pdwn`. */
if (vt_kbd_poweroff)
shutdown_nice(RB_HALT|RB_POWEROFF);
return (1);
case SPCLKEY | PNC: /* kbdmap(5) keyword `panic`. */
/*
* Request to immediate panic if sysctl
* kern.vt.enable_panic_key allow it.
*/
if (vt_kbd_panic)
panic("Forced by the panic key");
return (1);
case SPCLKEY | RBT: /* kbdmap(5) keyword `boot`. */
if (vt_kbd_reboot)
shutdown_nice(RB_AUTOBOOT);
return (1);
case SPCLKEY | SPSC: /* kbdmap(5) keyword `spsc`. */
/* Force activatation/deactivation of the screen saver. */
/* TODO */
return (1);
case SPCLKEY | STBY: /* XXX Not present in kbdcontrol parser. */
/* Put machine into Stand-By mode. */
power_pm_suspend(POWER_SLEEP_STATE_STANDBY);
return (1);
case SPCLKEY | SUSP: /* kbdmap(5) keyword `susp`. */
/* Suspend machine. */
power_pm_suspend(POWER_SLEEP_STATE_SUSPEND);
return (1);
}
return (0);
}
static void
vt_scrollmode_kbdevent(struct vt_window *vw, int c, int console)
{
struct vt_device *vd;
term_pos_t size;
vd = vw->vw_device;
/* Only special keys handled in ScrollLock mode */
if ((c & SPCLKEY) == 0)
return;
c &= ~SPCLKEY;
if (console == 0) {
if (c >= F_SCR && c <= MIN(L_SCR, F_SCR + VT_MAXWINDOWS - 1)) {
vw = vd->vd_windows[c - F_SCR];
vt_proc_window_switch(vw);
return;
}
VT_LOCK(vd);
}
switch (c) {
case SLK: {
/* Turn scrolling off. */
vt_scroll(vw, 0, VHS_END);
VTBUF_SLCK_DISABLE(&vw->vw_buf);
vw->vw_flags &= ~VWF_SCROLL;
break;
}
case FKEY | F(49): /* Home key. */
vt_scroll(vw, 0, VHS_SET);
break;
case FKEY | F(50): /* Arrow up. */
vt_scroll(vw, -1, VHS_CUR);
break;
case FKEY | F(51): /* Page up. */
vt_termsize(vd, vw->vw_font, &size);
vt_scroll(vw, -size.tp_row, VHS_CUR);
break;
case FKEY | F(57): /* End key. */
vt_scroll(vw, 0, VHS_END);
break;
case FKEY | F(58): /* Arrow down. */
vt_scroll(vw, 1, VHS_CUR);
break;
case FKEY | F(59): /* Page down. */
vt_termsize(vd, vw->vw_font, &size);
vt_scroll(vw, size.tp_row, VHS_CUR);
break;
}
if (console == 0)
VT_UNLOCK(vd);
}
static int
vt_processkey(keyboard_t *kbd, struct vt_device *vd, int c)
{
struct vt_window *vw = vd->vd_curwindow;
random_harvest_queue(&c, sizeof(c), RANDOM_KEYBOARD);
#if VT_ALT_TO_ESC_HACK
if (c & RELKEY) {
switch (c & ~RELKEY) {
case (SPCLKEY | RALT):
if (vt_enable_altgr != 0)
break;
case (SPCLKEY | LALT):
vd->vd_kbstate &= ~ALKED;
}
/* Other keys ignored for RELKEY event. */
return (0);
} else {
switch (c & ~RELKEY) {
case (SPCLKEY | RALT):
if (vt_enable_altgr != 0)
break;
case (SPCLKEY | LALT):
vd->vd_kbstate |= ALKED;
}
}
#else
if (c & RELKEY)
/* Other keys ignored for RELKEY event. */
return (0);
#endif
if (vt_machine_kbdevent(vd, c))
return (0);
if (vw->vw_flags & VWF_SCROLL) {
vt_scrollmode_kbdevent(vw, c, 0/* Not a console */);
/* Scroll mode keys handled, nothing to do more. */
return (0);
}
if (c & SPCLKEY) {
c &= ~SPCLKEY;
if (c >= F_SCR && c <= MIN(L_SCR, F_SCR + VT_MAXWINDOWS - 1)) {
vw = vd->vd_windows[c - F_SCR];
vt_proc_window_switch(vw);
return (0);
}
switch (c) {
case NEXT:
/* Switch to next VT. */
c = (vw->vw_number + 1) % VT_MAXWINDOWS;
vw = vd->vd_windows[c];
vt_proc_window_switch(vw);
return (0);
case PREV:
/* Switch to previous VT. */
c = (vw->vw_number + VT_MAXWINDOWS - 1) % VT_MAXWINDOWS;
vw = vd->vd_windows[c];
vt_proc_window_switch(vw);
return (0);
case SLK: {
vt_save_kbd_state(vw, kbd);
VT_LOCK(vd);
if (vw->vw_kbdstate & SLKED) {
/* Turn scrolling on. */
vw->vw_flags |= VWF_SCROLL;
VTBUF_SLCK_ENABLE(&vw->vw_buf);
} else {
/* Turn scrolling off. */
vw->vw_flags &= ~VWF_SCROLL;
VTBUF_SLCK_DISABLE(&vw->vw_buf);
vt_scroll(vw, 0, VHS_END);
}
VT_UNLOCK(vd);
break;
}
case FKEY | F(1): case FKEY | F(2): case FKEY | F(3):
case FKEY | F(4): case FKEY | F(5): case FKEY | F(6):
case FKEY | F(7): case FKEY | F(8): case FKEY | F(9):
case FKEY | F(10): case FKEY | F(11): case FKEY | F(12):
/* F1 through F12 keys. */
terminal_input_special(vw->vw_terminal,
TKEY_F1 + c - (FKEY | F(1)));
break;
case FKEY | F(49): /* Home key. */
terminal_input_special(vw->vw_terminal, TKEY_HOME);
break;
case FKEY | F(50): /* Arrow up. */
terminal_input_special(vw->vw_terminal, TKEY_UP);
break;
case FKEY | F(51): /* Page up. */
terminal_input_special(vw->vw_terminal, TKEY_PAGE_UP);
break;
case FKEY | F(53): /* Arrow left. */
terminal_input_special(vw->vw_terminal, TKEY_LEFT);
break;
case FKEY | F(55): /* Arrow right. */
terminal_input_special(vw->vw_terminal, TKEY_RIGHT);
break;
case FKEY | F(57): /* End key. */
terminal_input_special(vw->vw_terminal, TKEY_END);
break;
case FKEY | F(58): /* Arrow down. */
terminal_input_special(vw->vw_terminal, TKEY_DOWN);
break;
case FKEY | F(59): /* Page down. */
terminal_input_special(vw->vw_terminal, TKEY_PAGE_DOWN);
break;
case FKEY | F(60): /* Insert key. */
terminal_input_special(vw->vw_terminal, TKEY_INSERT);
break;
case FKEY | F(61): /* Delete key. */
terminal_input_special(vw->vw_terminal, TKEY_DELETE);
break;
}
} else if (KEYFLAGS(c) == 0) {
/* Don't do UTF-8 conversion when doing raw mode. */
if (vw->vw_kbdmode == K_XLATE) {
#if VT_ALT_TO_ESC_HACK
if (vd->vd_kbstate & ALKED) {
/*
* Prepend ESC sequence if one of ALT keys down.
*/
terminal_input_char(vw->vw_terminal, 0x1b);
}
#endif
#if defined(KDB)
kdb_alt_break(c, &vd->vd_altbrk);
#endif
terminal_input_char(vw->vw_terminal, KEYCHAR(c));
} else
terminal_input_raw(vw->vw_terminal, c);
}
return (0);
}
static int
vt_kbdevent(keyboard_t *kbd, int event, void *arg)
{
struct vt_device *vd = arg;
int c;
switch (event) {
case KBDIO_KEYINPUT:
break;
case KBDIO_UNLOADING:
mtx_lock(&Giant);
vd->vd_keyboard = NULL;
kbd_release(kbd, (void *)vd);
mtx_unlock(&Giant);
return (0);
default:
return (EINVAL);
}
while ((c = kbdd_read_char(kbd, 0)) != NOKEY)
vt_processkey(kbd, vd, c);
return (0);
}
static int
vt_allocate_keyboard(struct vt_device *vd)
{
int grabbed, i, idx0, idx;
keyboard_t *k0, *k;
keyboard_info_t ki;
/*
* If vt_upgrade() happens while the console is grabbed, we are
* potentially going to switch keyboard devices while the keyboard is in
* use. Unwind the grabbing of the current keyboard first, then we will
* re-grab the new keyboard below, before we return.
*/
if (vd->vd_curwindow == &vt_conswindow) {
grabbed = vd->vd_curwindow->vw_grabbed;
for (i = 0; i < grabbed; ++i)
vtterm_cnungrab_noswitch(vd, vd->vd_curwindow);
}
idx0 = kbd_allocate("kbdmux", -1, vd, vt_kbdevent, vd);
if (idx0 >= 0) {
DPRINTF(20, "%s: kbdmux allocated, idx = %d\n", __func__, idx0);
k0 = kbd_get_keyboard(idx0);
for (idx = kbd_find_keyboard2("*", -1, 0);
idx != -1;
idx = kbd_find_keyboard2("*", -1, idx + 1)) {
k = kbd_get_keyboard(idx);
if (idx == idx0 || KBD_IS_BUSY(k))
continue;
bzero(&ki, sizeof(ki));
strncpy(ki.kb_name, k->kb_name, sizeof(ki.kb_name));
ki.kb_name[sizeof(ki.kb_name) - 1] = '\0';
ki.kb_unit = k->kb_unit;
kbdd_ioctl(k0, KBADDKBD, (caddr_t) &ki);
}
} else {
DPRINTF(20, "%s: no kbdmux allocated\n", __func__);
idx0 = kbd_allocate("*", -1, vd, vt_kbdevent, vd);
if (idx0 < 0) {
DPRINTF(10, "%s: No keyboard found.\n", __func__);
return (-1);
}
k0 = kbd_get_keyboard(idx0);
}
vd->vd_keyboard = k0;
DPRINTF(20, "%s: vd_keyboard = %d\n", __func__,
vd->vd_keyboard->kb_index);
if (vd->vd_curwindow == &vt_conswindow) {
for (i = 0; i < grabbed; ++i)
vtterm_cngrab_noswitch(vd, vd->vd_curwindow);
}
return (idx0);
}
static void
vtterm_bell(struct terminal *tm)
{
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
if (!vt_enable_bell)
return;
if (vd->vd_flags & VDF_QUIET_BELL)
return;
sysbeep(1193182 / VT_BELLPITCH, VT_BELLDURATION);
}
static void
vtterm_beep(struct terminal *tm, u_int param)
{
u_int freq, period;
if (!vt_enable_bell)
return;
if ((param == 0) || ((param & 0xffff) == 0)) {
vtterm_bell(tm);
return;
}
period = ((param >> 16) & 0xffff) * hz / 1000;
freq = 1193182 / (param & 0xffff);
sysbeep(freq, period);
}
static void
vtterm_cursor(struct terminal *tm, const term_pos_t *p)
{
struct vt_window *vw = tm->tm_softc;
vtbuf_cursor_position(&vw->vw_buf, p);
}
static void
vtterm_putchar(struct terminal *tm, const term_pos_t *p, term_char_t c)
{
struct vt_window *vw = tm->tm_softc;
vtbuf_putchar(&vw->vw_buf, p, c);
}
static void
vtterm_fill(struct terminal *tm, const term_rect_t *r, term_char_t c)
{
struct vt_window *vw = tm->tm_softc;
vtbuf_fill(&vw->vw_buf, r, c);
}
static void
vtterm_copy(struct terminal *tm, const term_rect_t *r,
const term_pos_t *p)
{
struct vt_window *vw = tm->tm_softc;
vtbuf_copy(&vw->vw_buf, r, p);
}
static void
vtterm_param(struct terminal *tm, int cmd, unsigned int arg)
{
struct vt_window *vw = tm->tm_softc;
switch (cmd) {
case TP_SETLOCALCURSOR:
/*
* 0 means normal (usually block), 1 means hidden, and
* 2 means blinking (always block) for compatibility with
* syscons. We don't support any changes except hiding,
* so must map 2 to 0.
*/
arg = (arg == 1) ? 0 : 1;
/* FALLTHROUGH */
case TP_SHOWCURSOR:
vtbuf_cursor_visibility(&vw->vw_buf, arg);
vt_resume_flush_timer(vw, 0);
break;
case TP_MOUSE:
vw->vw_mouse_level = arg;
break;
}
}
void
vt_determine_colors(term_char_t c, int cursor,
term_color_t *fg, term_color_t *bg)
{
term_color_t tmp;
int invert;
invert = 0;
*fg = TCHAR_FGCOLOR(c);
if (TCHAR_FORMAT(c) & TF_BOLD)
*fg = TCOLOR_LIGHT(*fg);
*bg = TCHAR_BGCOLOR(c);
if (TCHAR_FORMAT(c) & TF_BLINK)
*bg = TCOLOR_LIGHT(*bg);
if (TCHAR_FORMAT(c) & TF_REVERSE)
invert ^= 1;
if (cursor)
invert ^= 1;
if (invert) {
tmp = *fg;
*fg = *bg;
*bg = tmp;
}
}
#ifndef SC_NO_CUTPASTE
int
vt_is_cursor_in_area(const struct vt_device *vd, const term_rect_t *area)
{
unsigned int mx, my;
/*
* We use the cursor position saved during the current refresh,
* in case the cursor moved since.
*/
mx = vd->vd_mx_drawn + vd->vd_curwindow->vw_draw_area.tr_begin.tp_col;
my = vd->vd_my_drawn + vd->vd_curwindow->vw_draw_area.tr_begin.tp_row;
if (mx >= area->tr_end.tp_col ||
mx + vd->vd_mcursor->width <= area->tr_begin.tp_col ||
my >= area->tr_end.tp_row ||
my + vd->vd_mcursor->height <= area->tr_begin.tp_row)
return (0);
return (1);
}
static void
vt_mark_mouse_position_as_dirty(struct vt_device *vd, int locked)
{
term_rect_t area;
struct vt_window *vw;
struct vt_font *vf;
int x, y;
vw = vd->vd_curwindow;
vf = vw->vw_font;
x = vd->vd_mx_drawn;
y = vd->vd_my_drawn;
if (vf != NULL) {
area.tr_begin.tp_col = x / vf->vf_width;
area.tr_begin.tp_row = y / vf->vf_height;
area.tr_end.tp_col =
((x + vd->vd_mcursor->width) / vf->vf_width) + 1;
area.tr_end.tp_row =
((y + vd->vd_mcursor->height) / vf->vf_height) + 1;
} else {
/*
* No font loaded (ie. vt_vga operating in textmode).
*
* FIXME: This fake area needs to be revisited once the
* mouse cursor is supported in vt_vga's textmode.
*/
area.tr_begin.tp_col = x;
area.tr_begin.tp_row = y;
area.tr_end.tp_col = x + 2;
area.tr_end.tp_row = y + 2;
}
if (!locked)
vtbuf_lock(&vw->vw_buf);
if (vd->vd_driver->vd_invalidate_text)
vd->vd_driver->vd_invalidate_text(vd, &area);
vtbuf_dirty(&vw->vw_buf, &area);
if (!locked)
vtbuf_unlock(&vw->vw_buf);
}
#endif
static void
vt_set_border(struct vt_device *vd, const term_rect_t *area,
term_color_t c)
{
vd_drawrect_t *drawrect = vd->vd_driver->vd_drawrect;
if (drawrect == NULL)
return;
/* Top bar */
if (area->tr_begin.tp_row > 0)
drawrect(vd, 0, 0, vd->vd_width - 1,
area->tr_begin.tp_row - 1, 1, c);
/* Left bar */
if (area->tr_begin.tp_col > 0)
drawrect(vd, 0, area->tr_begin.tp_row,
area->tr_begin.tp_col - 1, area->tr_end.tp_row - 1, 1, c);
/* Right bar */
if (area->tr_end.tp_col < vd->vd_width)
drawrect(vd, area->tr_end.tp_col, area->tr_begin.tp_row,
vd->vd_width - 1, area->tr_end.tp_row - 1, 1, c);
/* Bottom bar */
if (area->tr_end.tp_row < vd->vd_height)
drawrect(vd, 0, area->tr_end.tp_row, vd->vd_width - 1,
vd->vd_height - 1, 1, c);
}
static int
vt_flush(struct vt_device *vd)
{
struct vt_window *vw;
struct vt_font *vf;
term_rect_t tarea;
#ifndef SC_NO_CUTPASTE
int cursor_was_shown, cursor_moved;
#endif
vw = vd->vd_curwindow;
if (vw == NULL)
return (0);
if (vd->vd_flags & VDF_SPLASH || vw->vw_flags & VWF_BUSY)
return (0);
vf = vw->vw_font;
if (((vd->vd_flags & VDF_TEXTMODE) == 0) && (vf == NULL))
return (0);
vtbuf_lock(&vw->vw_buf);
#ifndef SC_NO_CUTPASTE
cursor_was_shown = vd->vd_mshown;
cursor_moved = (vd->vd_mx != vd->vd_mx_drawn ||
vd->vd_my != vd->vd_my_drawn);
/* Check if the cursor should be displayed or not. */
if ((vd->vd_flags & VDF_MOUSECURSOR) && /* Mouse support enabled. */
!(vw->vw_flags & VWF_MOUSE_HIDE) && /* Cursor displayed. */
!kdb_active && !KERNEL_PANICKED()) { /* DDB inactive. */
vd->vd_mshown = 1;
} else {
vd->vd_mshown = 0;
}
/*
* If the cursor changed display state or moved, we must mark
* the old position as dirty, so that it's erased.
*/
if (cursor_was_shown != vd->vd_mshown ||
(vd->vd_mshown && cursor_moved))
vt_mark_mouse_position_as_dirty(vd, true);
/*
* Save position of the mouse cursor. It's used by backends to
* know where to draw the cursor and during the next refresh to
* erase the previous position.
*/
vd->vd_mx_drawn = vd->vd_mx;
vd->vd_my_drawn = vd->vd_my;
/*
* If the cursor is displayed and has moved since last refresh,
* mark the new position as dirty.
*/
if (vd->vd_mshown && cursor_moved)
vt_mark_mouse_position_as_dirty(vd, true);
#endif
vtbuf_undirty(&vw->vw_buf, &tarea);
/* Force a full redraw when the screen contents might be invalid. */
if (vd->vd_flags & (VDF_INVALID | VDF_SUSPENDED)) {
const teken_attr_t *a;
vd->vd_flags &= ~VDF_INVALID;
a = teken_get_curattr(&vw->vw_terminal->tm_emulator);
vt_set_border(vd, &vw->vw_draw_area, a->ta_bgcolor);
vt_termrect(vd, vf, &tarea);
if (vd->vd_driver->vd_invalidate_text)
vd->vd_driver->vd_invalidate_text(vd, &tarea);
if (vt_draw_logo_cpus)
vtterm_draw_cpu_logos(vd);
}
if (tarea.tr_begin.tp_col < tarea.tr_end.tp_col) {
vd->vd_driver->vd_bitblt_text(vd, vw, &tarea);
vtbuf_unlock(&vw->vw_buf);
return (1);
}
vtbuf_unlock(&vw->vw_buf);
return (0);
}
static void
vt_timer(void *arg)
{
struct vt_device *vd;
int changed;
vd = arg;
/* Update screen if required. */
changed = vt_flush(vd);
/* Schedule for next update. */
if (changed)
vt_schedule_flush(vd, 0);
else
vd->vd_timer_armed = 0;
}
static void
vtterm_pre_input(struct terminal *tm)
{
struct vt_window *vw = tm->tm_softc;
vtbuf_lock(&vw->vw_buf);
}
static void
vtterm_post_input(struct terminal *tm)
{
struct vt_window *vw = tm->tm_softc;
vtbuf_unlock(&vw->vw_buf);
vt_resume_flush_timer(vw, 0);
}
static void
vtterm_done(struct terminal *tm)
{
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
if (kdb_active || KERNEL_PANICKED()) {
/* Switch to the debugger. */
if (vd->vd_curwindow != vw) {
vd->vd_curwindow = vw;
vd->vd_flags |= VDF_INVALID;
if (vd->vd_driver->vd_postswitch)
vd->vd_driver->vd_postswitch(vd);
}
vd->vd_flags &= ~VDF_SPLASH;
vt_flush(vd);
} else if (!(vd->vd_flags & VDF_ASYNC)) {
vt_flush(vd);
}
}
#ifdef DEV_SPLASH
static void
vtterm_splash(struct vt_device *vd)
{
vt_axis_t top, left;
/* Display a nice boot splash. */
if (!(vd->vd_flags & VDF_TEXTMODE) && (boothowto & RB_MUTE)) {
top = (vd->vd_height - vt_logo_height) / 2;
left = (vd->vd_width - vt_logo_width) / 2;
switch (vt_logo_depth) {
case 1:
/* XXX: Unhardcode colors! */
vd->vd_driver->vd_bitblt_bmp(vd, vd->vd_curwindow,
vt_logo_image, NULL, vt_logo_width, vt_logo_height,
left, top, TC_WHITE, TC_BLACK);
}
vd->vd_flags |= VDF_SPLASH;
}
}
#endif
static struct vt_font *
parse_font_info_static(struct font_info *fi)
{
struct vt_font *vfp;
uintptr_t ptr;
uint32_t checksum;
if (fi == NULL)
return (NULL);
ptr = (uintptr_t)fi;
/*
* Compute and verify checksum. The total sum of all the fields
* must be 0.
*/
checksum = fi->fi_width;
checksum += fi->fi_height;
checksum += fi->fi_bitmap_size;
for (unsigned i = 0; i < VFNT_MAPS; i++)
checksum += fi->fi_map_count[i];
if (checksum + fi->fi_checksum != 0)
return (NULL);
ptr += sizeof(struct font_info);
ptr = roundup2(ptr, 8);
vfp = &vt_font_loader;
vfp->vf_height = fi->fi_height;
vfp->vf_width = fi->fi_width;
/* This is default font, set refcount 1 to disable removal. */
vfp->vf_refcount = 1;
for (unsigned i = 0; i < VFNT_MAPS; i++) {
if (fi->fi_map_count[i] == 0)
continue;
vfp->vf_map_count[i] = fi->fi_map_count[i];
vfp->vf_map[i] = (vfnt_map_t *)ptr;
ptr += (fi->fi_map_count[i] * sizeof(vfnt_map_t));
ptr = roundup2(ptr, 8);
}
vfp->vf_bytes = (uint8_t *)ptr;
return (vfp);
}
/*
* Set up default font with allocated data structures.
* However, we can not set refcount here, because it is already set and
* incremented in vtterm_cnprobe() to avoid being released by font load from
* userland.
*/
static struct vt_font *
parse_font_info(struct font_info *fi)
{
struct vt_font *vfp;
uintptr_t ptr;
uint32_t checksum;
size_t size;
if (fi == NULL)
return (NULL);
ptr = (uintptr_t)fi;
/*
* Compute and verify checksum. The total sum of all the fields
* must be 0.
*/
checksum = fi->fi_width;
checksum += fi->fi_height;
checksum += fi->fi_bitmap_size;
for (unsigned i = 0; i < VFNT_MAPS; i++)
checksum += fi->fi_map_count[i];
if (checksum + fi->fi_checksum != 0)
return (NULL);
ptr += sizeof(struct font_info);
ptr = roundup2(ptr, 8);
vfp = &vt_font_loader;
vfp->vf_height = fi->fi_height;
vfp->vf_width = fi->fi_width;
for (unsigned i = 0; i < VFNT_MAPS; i++) {
if (fi->fi_map_count[i] == 0)
continue;
vfp->vf_map_count[i] = fi->fi_map_count[i];
size = fi->fi_map_count[i] * sizeof(vfnt_map_t);
vfp->vf_map[i] = malloc(size, M_VT, M_WAITOK | M_ZERO);
bcopy((vfnt_map_t *)ptr, vfp->vf_map[i], size);
ptr += size;
ptr = roundup2(ptr, 8);
}
vfp->vf_bytes = malloc(fi->fi_bitmap_size, M_VT, M_WAITOK | M_ZERO);
bcopy((uint8_t *)ptr, vfp->vf_bytes, fi->fi_bitmap_size);
return (vfp);
}
static void
vt_init_font(void *arg)
{
caddr_t kmdp;
struct font_info *fi;
struct vt_font *font;
kmdp = preload_search_by_type("elf kernel");
if (kmdp == NULL)
kmdp = preload_search_by_type("elf64 kernel");
fi = MD_FETCH(kmdp, MODINFOMD_FONT, struct font_info *);
font = parse_font_info(fi);
if (font != NULL)
vt_font_assigned = font;
}
SYSINIT(vt_init_font, SI_SUB_KMEM, SI_ORDER_ANY, vt_init_font, &vt_consdev);
static void
vt_init_font_static(void)
{
caddr_t kmdp;
struct font_info *fi;
struct vt_font *font;
kmdp = preload_search_by_type("elf kernel");
if (kmdp == NULL)
kmdp = preload_search_by_type("elf64 kernel");
fi = MD_FETCH(kmdp, MODINFOMD_FONT, struct font_info *);
font = parse_font_info_static(fi);
if (font != NULL)
vt_font_assigned = font;
}
static void
vtterm_cnprobe(struct terminal *tm, struct consdev *cp)
{
struct vt_driver *vtd, **vtdlist, *vtdbest = NULL;
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
struct winsize wsz;
const term_attr_t *a;
if (!vty_enabled(VTY_VT))
return;
if (vd->vd_flags & VDF_INITIALIZED)
/* Initialization already done. */
return;
SET_FOREACH(vtdlist, vt_drv_set) {
vtd = *vtdlist;
if (vtd->vd_probe == NULL)
continue;
if (vtd->vd_probe(vd) == CN_DEAD)
continue;
if ((vtdbest == NULL) ||
(vtd->vd_priority > vtdbest->vd_priority))
vtdbest = vtd;
}
if (vtdbest == NULL) {
cp->cn_pri = CN_DEAD;
vd->vd_flags |= VDF_DEAD;
} else {
vd->vd_driver = vtdbest;
cp->cn_pri = vd->vd_driver->vd_init(vd);
}
/* Check if driver's vt_init return CN_DEAD. */
if (cp->cn_pri == CN_DEAD) {
vd->vd_flags |= VDF_DEAD;
}
/* Initialize any early-boot keyboard drivers */
kbd_configure(KB_CONF_PROBE_ONLY);
vd->vd_unit = atomic_fetchadd_int(&vt_unit, 1);
vd->vd_windows[VT_CONSWINDOW] = vw;
sprintf(cp->cn_name, "ttyv%r", VT_UNIT(vw));
vt_init_font_static();
/* Attach default font if not in TEXTMODE. */
if ((vd->vd_flags & VDF_TEXTMODE) == 0) {
vw->vw_font = vtfont_ref(vt_font_assigned);
vt_compute_drawable_area(vw);
}
/*
* The original screen size was faked (_VTDEFW x _VTDEFH). Now
* that we have the real viewable size, fix it in the static
* buffer.
*/
if (vd->vd_width != 0 && vd->vd_height != 0)
vt_termsize(vd, vw->vw_font, &vw->vw_buf.vb_scr_size);
/* We need to access terminal attributes from vtbuf */
vw->vw_buf.vb_terminal = tm;
vtbuf_init_early(&vw->vw_buf);
vt_winsize(vd, vw->vw_font, &wsz);
a = teken_get_curattr(&tm->tm_emulator);
terminal_set_winsize_blank(tm, &wsz, 1, a);
if (vtdbest != NULL) {
#ifdef DEV_SPLASH
if (!vt_splash_cpu)
vtterm_splash(vd);
#endif
vd->vd_flags |= VDF_INITIALIZED;
}
}
static int
vtterm_cngetc(struct terminal *tm)
{
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
keyboard_t *kbd;
u_int c;
if (vw->vw_kbdsq && *vw->vw_kbdsq)
return (*vw->vw_kbdsq++);
/* Make sure the splash screen is not there. */
if (vd->vd_flags & VDF_SPLASH) {
/* Remove splash */
vd->vd_flags &= ~VDF_SPLASH;
/* Mark screen as invalid to force update */
vd->vd_flags |= VDF_INVALID;
vt_flush(vd);
}
/* Stripped down keyboard handler. */
if ((kbd = vd->vd_keyboard) == NULL)
return (-1);
/* Force keyboard input mode to K_XLATE */
vw->vw_kbdmode = K_XLATE;
vt_update_kbd_mode(vw, kbd);
/* Switch the keyboard to polling to make it work here. */
kbdd_poll(kbd, TRUE);
c = kbdd_read_char(kbd, 0);
kbdd_poll(kbd, FALSE);
if (c & RELKEY)
return (-1);
if (vw->vw_flags & VWF_SCROLL) {
vt_scrollmode_kbdevent(vw, c, 1/* Console mode */);
vt_flush(vd);
return (-1);
}
/* Stripped down handling of vt_kbdevent(), without locking, etc. */
if (c & SPCLKEY) {
switch (c) {
case SPCLKEY | SLK:
vt_save_kbd_state(vw, kbd);
if (vw->vw_kbdstate & SLKED) {
/* Turn scrolling on. */
vw->vw_flags |= VWF_SCROLL;
VTBUF_SLCK_ENABLE(&vw->vw_buf);
} else {
/* Turn scrolling off. */
vt_scroll(vw, 0, VHS_END);
vw->vw_flags &= ~VWF_SCROLL;
VTBUF_SLCK_DISABLE(&vw->vw_buf);
}
break;
/* XXX: KDB can handle history. */
case SPCLKEY | FKEY | F(50): /* Arrow up. */
vw->vw_kbdsq = "\x1b[A";
break;
case SPCLKEY | FKEY | F(58): /* Arrow down. */
vw->vw_kbdsq = "\x1b[B";
break;
case SPCLKEY | FKEY | F(55): /* Arrow right. */
vw->vw_kbdsq = "\x1b[C";
break;
case SPCLKEY | FKEY | F(53): /* Arrow left. */
vw->vw_kbdsq = "\x1b[D";
break;
}
/* Force refresh to make scrollback work. */
vt_flush(vd);
} else if (KEYFLAGS(c) == 0) {
return (KEYCHAR(c));
}
if (vw->vw_kbdsq && *vw->vw_kbdsq)
return (*vw->vw_kbdsq++);
return (-1);
}
/*
* These two do most of what we want to do in vtterm_cnungrab, but without
* actually switching windows. This is necessary for, e.g.,
* vt_allocate_keyboard() to get the current keyboard into the state it needs to
* be in without damaging the device's window state.
*
* Both return the current grab count, though it's only used in vtterm_cnungrab.
*/
static int
vtterm_cngrab_noswitch(struct vt_device *vd, struct vt_window *vw)
{
keyboard_t *kbd;
if (vw->vw_grabbed++ > 0)
return (vw->vw_grabbed);
if ((kbd = vd->vd_keyboard) == NULL)
return (1);
/*
* Make sure the keyboard is accessible even when the kbd device
* driver is disabled.
*/
kbdd_enable(kbd);
/* We shall always use the keyboard in the XLATE mode here. */
vw->vw_prev_kbdmode = vw->vw_kbdmode;
vw->vw_kbdmode = K_XLATE;
vt_update_kbd_mode(vw, kbd);
kbdd_poll(kbd, TRUE);
return (1);
}
static int
vtterm_cnungrab_noswitch(struct vt_device *vd, struct vt_window *vw)
{
keyboard_t *kbd;
if (--vw->vw_grabbed > 0)
return (vw->vw_grabbed);
if ((kbd = vd->vd_keyboard) == NULL)
return (0);
kbdd_poll(kbd, FALSE);
vw->vw_kbdmode = vw->vw_prev_kbdmode;
vt_update_kbd_mode(vw, kbd);
kbdd_disable(kbd);
return (0);
}
static void
vtterm_cngrab(struct terminal *tm)
{
struct vt_device *vd;
struct vt_window *vw;
vw = tm->tm_softc;
vd = vw->vw_device;
/* To be restored after we ungrab. */
if (vd->vd_grabwindow == NULL)
vd->vd_grabwindow = vd->vd_curwindow;
if (!cold)
vt_window_switch(vw);
vtterm_cngrab_noswitch(vd, vw);
}
static void
vtterm_cnungrab(struct terminal *tm)
{
struct vt_device *vd;
struct vt_window *vw;
vw = tm->tm_softc;
vd = vw->vw_device;
MPASS(vd->vd_grabwindow != NULL);
if (vtterm_cnungrab_noswitch(vd, vw) != 0)
return;
if (!cold && vd->vd_grabwindow != vw)
vt_window_switch(vd->vd_grabwindow);
vd->vd_grabwindow = NULL;
}
static void
vtterm_opened(struct terminal *tm, int opened)
{
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
VT_LOCK(vd);
vd->vd_flags &= ~VDF_SPLASH;
if (opened)
vw->vw_flags |= VWF_OPENED;
else {
vw->vw_flags &= ~VWF_OPENED;
/* TODO: finish ACQ/REL */
}
VT_UNLOCK(vd);
}
static int
vt_change_font(struct vt_window *vw, struct vt_font *vf)
{
struct vt_device *vd = vw->vw_device;
struct terminal *tm = vw->vw_terminal;
term_pos_t size;
struct winsize wsz;
/*
* Changing fonts.
*
* Changing fonts is a little tricky. We must prevent
* simultaneous access to the device, so we must stop
* the display timer and the terminal from accessing.
* We need to switch fonts and grow our screen buffer.
*
* XXX: Right now the code uses terminal_mute() to
* prevent data from reaching the console driver while
* resizing the screen buffer. This isn't elegant...
*/
VT_LOCK(vd);
if (vw->vw_flags & VWF_BUSY) {
/* Another process is changing the font. */
VT_UNLOCK(vd);
return (EBUSY);
}
vw->vw_flags |= VWF_BUSY;
VT_UNLOCK(vd);
vt_termsize(vd, vf, &size);
vt_winsize(vd, vf, &wsz);
/* Grow the screen buffer and terminal. */
terminal_mute(tm, 1);
vtbuf_grow(&vw->vw_buf, &size, vw->vw_buf.vb_history_size);
terminal_set_winsize_blank(tm, &wsz, 0, NULL);
terminal_set_cursor(tm, &vw->vw_buf.vb_cursor);
terminal_mute(tm, 0);
/* Actually apply the font to the current window. */
VT_LOCK(vd);
if (vw->vw_font != vf && vw->vw_font != NULL && vf != NULL) {
/*
* In case vt_change_font called to update size we don't need
* to update font link.
*/
vtfont_unref(vw->vw_font);
vw->vw_font = vtfont_ref(vf);
}
/*
* Compute the drawable area and move the mouse cursor inside
* it, in case the new area is smaller than the previous one.
*/
vt_compute_drawable_area(vw);
vd->vd_mx = min(vd->vd_mx,
vw->vw_draw_area.tr_end.tp_col -
vw->vw_draw_area.tr_begin.tp_col - 1);
vd->vd_my = min(vd->vd_my,
vw->vw_draw_area.tr_end.tp_row -
vw->vw_draw_area.tr_begin.tp_row - 1);
/* Force a full redraw the next timer tick. */
if (vd->vd_curwindow == vw) {
vd->vd_flags |= VDF_INVALID;
vt_resume_flush_timer(vw, 0);
}
vw->vw_flags &= ~VWF_BUSY;
VT_UNLOCK(vd);
return (0);
}
static int
vt_proc_alive(struct vt_window *vw)
{
struct proc *p;
if (vw->vw_smode.mode != VT_PROCESS)
return (FALSE);
if (vw->vw_proc) {
if ((p = pfind(vw->vw_pid)) != NULL)
PROC_UNLOCK(p);
if (vw->vw_proc == p)
return (TRUE);
vw->vw_proc = NULL;
vw->vw_smode.mode = VT_AUTO;
DPRINTF(1, "vt controlling process %d died\n", vw->vw_pid);
vw->vw_pid = 0;
}
return (FALSE);
}
static int
signal_vt_rel(struct vt_window *vw)
{
if (vw->vw_smode.mode != VT_PROCESS)
return (FALSE);
if (vw->vw_proc == NULL || vt_proc_alive(vw) == FALSE) {
vw->vw_proc = NULL;
vw->vw_pid = 0;
return (TRUE);
}
vw->vw_flags |= VWF_SWWAIT_REL;
PROC_LOCK(vw->vw_proc);
kern_psignal(vw->vw_proc, vw->vw_smode.relsig);
PROC_UNLOCK(vw->vw_proc);
DPRINTF(1, "sending relsig to %d\n", vw->vw_pid);
return (TRUE);
}
static int
signal_vt_acq(struct vt_window *vw)
{
if (vw->vw_smode.mode != VT_PROCESS)
return (FALSE);
if (vw == vw->vw_device->vd_windows[VT_CONSWINDOW])
cnavailable(vw->vw_terminal->consdev, FALSE);
if (vw->vw_proc == NULL || vt_proc_alive(vw) == FALSE) {
vw->vw_proc = NULL;
vw->vw_pid = 0;
return (TRUE);
}
vw->vw_flags |= VWF_SWWAIT_ACQ;
PROC_LOCK(vw->vw_proc);
kern_psignal(vw->vw_proc, vw->vw_smode.acqsig);
PROC_UNLOCK(vw->vw_proc);
DPRINTF(1, "sending acqsig to %d\n", vw->vw_pid);
return (TRUE);
}
static int
finish_vt_rel(struct vt_window *vw, int release, int *s)
{
if (vw->vw_flags & VWF_SWWAIT_REL) {
vw->vw_flags &= ~VWF_SWWAIT_REL;
if (release) {
callout_drain(&vw->vw_proc_dead_timer);
(void)vt_late_window_switch(vw->vw_switch_to);
}
return (0);
}
return (EINVAL);
}
static int
finish_vt_acq(struct vt_window *vw)
{
if (vw->vw_flags & VWF_SWWAIT_ACQ) {
vw->vw_flags &= ~VWF_SWWAIT_ACQ;
return (0);
}
return (EINVAL);
}
#ifndef SC_NO_CUTPASTE
static void
vt_mouse_terminput_button(struct vt_device *vd, int button)
{
struct vt_window *vw;
struct vt_font *vf;
char mouseb[6] = "\x1B[M";
int i, x, y;
vw = vd->vd_curwindow;
vf = vw->vw_font;
/* Translate to char position. */
x = vd->vd_mx / vf->vf_width;
y = vd->vd_my / vf->vf_height;
/* Avoid overflow. */
x = MIN(x, 255 - '!');
y = MIN(y, 255 - '!');
mouseb[3] = ' ' + button;
mouseb[4] = '!' + x;
mouseb[5] = '!' + y;
for (i = 0; i < sizeof(mouseb); i++)
terminal_input_char(vw->vw_terminal, mouseb[i]);
}
static void
vt_mouse_terminput(struct vt_device *vd, int type, int x, int y, int event,
int cnt)
{
switch (type) {
case MOUSE_BUTTON_EVENT:
if (cnt > 0) {
/* Mouse button pressed. */
if (event & MOUSE_BUTTON1DOWN)
vt_mouse_terminput_button(vd, 0);
if (event & MOUSE_BUTTON2DOWN)
vt_mouse_terminput_button(vd, 1);
if (event & MOUSE_BUTTON3DOWN)
vt_mouse_terminput_button(vd, 2);
} else {
/* Mouse button released. */
vt_mouse_terminput_button(vd, 3);
}
break;
#ifdef notyet
case MOUSE_MOTION_EVENT:
if (mouse->u.data.z < 0) {
/* Scroll up. */
sc_mouse_input_button(vd, 64);
} else if (mouse->u.data.z > 0) {
/* Scroll down. */
sc_mouse_input_button(vd, 65);
}
break;
#endif
}
}
static void
vt_mouse_paste()
{
term_char_t *buf;
int i, len;
len = VD_PASTEBUFLEN(main_vd);
buf = VD_PASTEBUF(main_vd);
len /= sizeof(term_char_t);
for (i = 0; i < len; i++) {
if (buf[i] == '\0')
continue;
terminal_input_char(main_vd->vd_curwindow->vw_terminal,
buf[i]);
}
}
void
vt_mouse_event(int type, int x, int y, int event, int cnt, int mlevel)
{
struct vt_device *vd;
struct vt_window *vw;
struct vt_font *vf;
term_pos_t size;
int len, mark;
vd = main_vd;
vw = vd->vd_curwindow;
vf = vw->vw_font;
mark = 0;
if (vw->vw_flags & (VWF_MOUSE_HIDE | VWF_GRAPHICS))
/*
* Either the mouse is disabled, or the window is in
* "graphics mode". The graphics mode is usually set by
* an X server, using the KDSETMODE ioctl.
*/
return;
if (vf == NULL) /* Text mode. */
return;
/*
* TODO: add flag about pointer position changed, to not redraw chars
* under mouse pointer when nothing changed.
*/
if (vw->vw_mouse_level > 0)
vt_mouse_terminput(vd, type, x, y, event, cnt);
switch (type) {
case MOUSE_ACTION:
case MOUSE_MOTION_EVENT:
/* Movement */
x += vd->vd_mx;
y += vd->vd_my;
vt_termsize(vd, vf, &size);
/* Apply limits. */
x = MAX(x, 0);
y = MAX(y, 0);
x = MIN(x, (size.tp_col * vf->vf_width) - 1);
y = MIN(y, (size.tp_row * vf->vf_height) - 1);
vd->vd_mx = x;
vd->vd_my = y;
if (vd->vd_mstate & MOUSE_BUTTON1DOWN)
vtbuf_set_mark(&vw->vw_buf, VTB_MARK_MOVE,
vd->vd_mx / vf->vf_width,
vd->vd_my / vf->vf_height);
vt_resume_flush_timer(vw, 0);
return; /* Done */
case MOUSE_BUTTON_EVENT:
/* Buttons */
break;
default:
return; /* Done */
}
switch (event) {
case MOUSE_BUTTON1DOWN:
switch (cnt % 4) {
case 0: /* up */
mark = VTB_MARK_END;
break;
case 1: /* single click: start cut operation */
mark = VTB_MARK_START;
break;
case 2: /* double click: cut a word */
mark = VTB_MARK_WORD;
break;
case 3: /* triple click: cut a line */
mark = VTB_MARK_ROW;
break;
}
break;
case VT_MOUSE_PASTEBUTTON:
switch (cnt) {
case 0: /* up */
break;
default:
vt_mouse_paste();
break;
}
return; /* Done */
case VT_MOUSE_EXTENDBUTTON:
switch (cnt) {
case 0: /* up */
if (!(vd->vd_mstate & MOUSE_BUTTON1DOWN))
mark = VTB_MARK_EXTEND;
else
mark = 0;
break;
default:
mark = VTB_MARK_EXTEND;
break;
}
break;
default:
return; /* Done */
}
/* Save buttons state. */
if (cnt > 0)
vd->vd_mstate |= event;
else
vd->vd_mstate &= ~event;
if (vtbuf_set_mark(&vw->vw_buf, mark, vd->vd_mx / vf->vf_width,
vd->vd_my / vf->vf_height) == 1) {
/*
* We have something marked to copy, so update pointer to
* window with selection.
*/
vt_resume_flush_timer(vw, 0);
switch (mark) {
case VTB_MARK_END:
case VTB_MARK_WORD:
case VTB_MARK_ROW:
case VTB_MARK_EXTEND:
break;
default:
/* Other types of mark do not require to copy data. */
return;
}
/* Get current selection size in bytes. */
len = vtbuf_get_marked_len(&vw->vw_buf);
if (len <= 0)
return;
/* Reallocate buffer only if old one is too small. */
if (len > VD_PASTEBUFSZ(vd)) {
VD_PASTEBUF(vd) = realloc(VD_PASTEBUF(vd), len, M_VT,
M_WAITOK | M_ZERO);
/* Update buffer size. */
VD_PASTEBUFSZ(vd) = len;
}
/* Request copy/paste buffer data, no more than `len' */
vtbuf_extract_marked(&vw->vw_buf, VD_PASTEBUF(vd),
VD_PASTEBUFSZ(vd));
VD_PASTEBUFLEN(vd) = len;
/* XXX VD_PASTEBUF(vd) have to be freed on shutdown/unload. */
}
}
void
vt_mouse_state(int show)
{
struct vt_device *vd;
struct vt_window *vw;
vd = main_vd;
vw = vd->vd_curwindow;
switch (show) {
case VT_MOUSE_HIDE:
vw->vw_flags |= VWF_MOUSE_HIDE;
break;
case VT_MOUSE_SHOW:
vw->vw_flags &= ~VWF_MOUSE_HIDE;
break;
}
/* Mark mouse position as dirty. */
vt_mark_mouse_position_as_dirty(vd, false);
vt_resume_flush_timer(vw, 0);
}
#endif
static int
vtterm_mmap(struct terminal *tm, vm_ooffset_t offset, vm_paddr_t * paddr,
int nprot, vm_memattr_t *memattr)
{
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
if (vd->vd_driver->vd_fb_mmap)
return (vd->vd_driver->vd_fb_mmap(vd, offset, paddr, nprot,
memattr));
return (ENXIO);
}
static int
vtterm_ioctl(struct terminal *tm, u_long cmd, caddr_t data,
struct thread *td)
{
struct vt_window *vw = tm->tm_softc;
struct vt_device *vd = vw->vw_device;
keyboard_t *kbd;
int error, i, s;
#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
int ival;
switch (cmd) {
case _IO('v', 4):
cmd = VT_RELDISP;
break;
case _IO('v', 5):
cmd = VT_ACTIVATE;
break;
case _IO('v', 6):
cmd = VT_WAITACTIVE;
break;
case _IO('K', 20):
cmd = KDSKBSTATE;
break;
case _IO('K', 67):
cmd = KDSETRAD;
break;
case _IO('K', 7):
cmd = KDSKBMODE;
break;
case _IO('K', 8):
cmd = KDMKTONE;
break;
case _IO('K', 10):
cmd = KDSETMODE;
break;
case _IO('K', 13):
cmd = KDSBORDER;
break;
case _IO('K', 63):
cmd = KIOCSOUND;
break;
case _IO('K', 66):
cmd = KDSETLED;
break;
case _IO('c', 104):
cmd = CONS_SETWINORG;
break;
case _IO('c', 110):
cmd = CONS_SETKBD;
break;
default:
goto skip_thunk;
}
ival = IOCPARM_IVAL(data);
data = (caddr_t)&ival;
skip_thunk:
#endif
switch (cmd) {
case KDSETRAD: /* set keyboard repeat & delay rates (old) */
if (*(int *)data & ~0x7f)
return (EINVAL);
/* FALLTHROUGH */
case GIO_KEYMAP:
case PIO_KEYMAP:
case GIO_DEADKEYMAP:
case PIO_DEADKEYMAP:
case GETFKEY:
case SETFKEY:
case KDGKBINFO:
case KDGKBTYPE:
case KDGETREPEAT: /* get keyboard repeat & delay rates */
case KDSETREPEAT: /* set keyboard repeat & delay rates (new) */
case KBADDKBD: /* add/remove keyboard to/from mux */
case KBRELKBD: {
error = 0;
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = kbdd_ioctl(kbd, cmd, data);
mtx_unlock(&Giant);
if (error == ENOIOCTL) {
if (cmd == KDGKBTYPE) {
/* always return something? XXX */
*(int *)data = 0;
} else {
return (ENODEV);
}
}
return (error);
}
case KDGKBSTATE: { /* get keyboard state (locks) */
error = 0;
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = vt_save_kbd_state(vw, kbd);
mtx_unlock(&Giant);
if (error != 0)
return (error);
}
*(int *)data = vw->vw_kbdstate & LOCK_MASK;
return (error);
}
case KDSKBSTATE: { /* set keyboard state (locks) */
int state;
state = *(int *)data;
if (state & ~LOCK_MASK)
return (EINVAL);
vw->vw_kbdstate &= ~LOCK_MASK;
vw->vw_kbdstate |= state;
error = 0;
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = vt_update_kbd_state(vw, kbd);
mtx_unlock(&Giant);
}
return (error);
}
case KDGETLED: { /* get keyboard LED status */
error = 0;
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = vt_save_kbd_leds(vw, kbd);
mtx_unlock(&Giant);
if (error != 0)
return (error);
}
*(int *)data = vw->vw_kbdstate & LED_MASK;
return (error);
}
case KDSETLED: { /* set keyboard LED status */
int leds;
leds = *(int *)data;
if (leds & ~LED_MASK)
return (EINVAL);
vw->vw_kbdstate &= ~LED_MASK;
vw->vw_kbdstate |= leds;
error = 0;
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = vt_update_kbd_leds(vw, kbd);
mtx_unlock(&Giant);
}
return (error);
}
case KDGETMODE:
*(int *)data = (vw->vw_flags & VWF_GRAPHICS) ?
KD_GRAPHICS : KD_TEXT;
return (0);
case KDGKBMODE: {
error = 0;
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = vt_save_kbd_mode(vw, kbd);
mtx_unlock(&Giant);
if (error != 0)
return (error);
}
*(int *)data = vw->vw_kbdmode;
return (error);
}
case KDSKBMODE: {
int mode;
mode = *(int *)data;
switch (mode) {
case K_XLATE:
case K_RAW:
case K_CODE:
vw->vw_kbdmode = mode;
error = 0;
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
error = vt_update_kbd_mode(vw, kbd);
mtx_unlock(&Giant);
}
return (error);
default:
return (EINVAL);
}
}
case FBIOGTYPE:
case FBIO_GETWINORG: /* get frame buffer window origin */
case FBIO_GETDISPSTART: /* get display start address */
case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
case FBIO_BLANK: /* blank display */
if (vd->vd_driver->vd_fb_ioctl)
return (vd->vd_driver->vd_fb_ioctl(vd, cmd, data, td));
break;
case CONS_BLANKTIME:
/* XXX */
return (0);
case CONS_HISTORY:
if (*(int *)data < 0)
return EINVAL;
if (*(int *)data != vw->vw_buf.vb_history_size)
vtbuf_sethistory_size(&vw->vw_buf, *(int *)data);
return (0);
case CONS_CLRHIST:
vtbuf_clearhistory(&vw->vw_buf);
/*
* Invalidate the entire visible window; it is not guaranteed
* that this operation will be immediately followed by a scroll
* event, so it would otherwise be possible for prior artifacts
* to remain visible.
*/
VT_LOCK(vd);
if (vw == vd->vd_curwindow) {
vd->vd_flags |= VDF_INVALID;
vt_resume_flush_timer(vw, 0);
}
VT_UNLOCK(vd);
return (0);
case CONS_GET:
/* XXX */
*(int *)data = M_CG640x480;
return (0);
case CONS_BELLTYPE: /* set bell type sound */
if ((*(int *)data) & CONS_QUIET_BELL)
vd->vd_flags |= VDF_QUIET_BELL;
else
vd->vd_flags &= ~VDF_QUIET_BELL;
return (0);
case CONS_GETINFO: {
vid_info_t *vi = (vid_info_t *)data;
if (vi->size != sizeof(struct vid_info))
return (EINVAL);
if (vw == vd->vd_curwindow) {
mtx_lock(&Giant);
if ((kbd = vd->vd_keyboard) != NULL)
vt_save_kbd_state(vw, kbd);
mtx_unlock(&Giant);
}
vi->m_num = vd->vd_curwindow->vw_number + 1;
vi->mk_keylock = vw->vw_kbdstate & LOCK_MASK;
/* XXX: other fields! */
return (0);
}
case CONS_GETVERS:
*(int *)data = 0x200;
return (0);
case CONS_MODEINFO:
/* XXX */
return (0);
case CONS_MOUSECTL: {
mouse_info_t *mouse = (mouse_info_t*)data;
/*
* All the commands except MOUSE_SHOW nd MOUSE_HIDE
* should not be applied to individual TTYs, but only to
* consolectl.
*/
switch (mouse->operation) {
case MOUSE_HIDE:
if (vd->vd_flags & VDF_MOUSECURSOR) {
vd->vd_flags &= ~VDF_MOUSECURSOR;
#ifndef SC_NO_CUTPASTE
vt_mouse_state(VT_MOUSE_HIDE);
#endif
}
return (0);
case MOUSE_SHOW:
if (!(vd->vd_flags & VDF_MOUSECURSOR)) {
vd->vd_flags |= VDF_MOUSECURSOR;
vd->vd_mx = vd->vd_width / 2;
vd->vd_my = vd->vd_height / 2;
#ifndef SC_NO_CUTPASTE
vt_mouse_state(VT_MOUSE_SHOW);
#endif
}
return (0);
default:
return (EINVAL);
}
}
case PIO_VFONT: {
struct vt_font *vf;
if (vd->vd_flags & VDF_TEXTMODE)
return (ENOTSUP);
error = vtfont_load((void *)data, &vf);
if (error != 0)
return (error);
error = vt_change_font(vw, vf);
vtfont_unref(vf);
return (error);
}
case PIO_VFONT_DEFAULT: {
/* Reset to default font. */
error = vt_change_font(vw, vt_font_assigned);
return (error);
}
case GIO_SCRNMAP: {
scrmap_t *sm = (scrmap_t *)data;
/* We don't have screen maps, so return a handcrafted one. */
for (i = 0; i < 256; i++)
sm->scrmap[i] = i;
return (0);
}
case KDSETMODE:
/*
* FIXME: This implementation is incomplete compared to
* syscons.
*/
switch (*(int *)data) {
case KD_TEXT:
case KD_TEXT1:
case KD_PIXEL:
vw->vw_flags &= ~VWF_GRAPHICS;
break;
case KD_GRAPHICS:
vw->vw_flags |= VWF_GRAPHICS;
break;
}
return (0);
case KDENABIO: /* allow io operations */
error = priv_check(td, PRIV_IO);
if (error != 0)
return (error);
error = securelevel_gt(td->td_ucred, 0);
if (error != 0)
return (error);
#if defined(__i386__)
td->td_frame->tf_eflags |= PSL_IOPL;
#elif defined(__amd64__)
td->td_frame->tf_rflags |= PSL_IOPL;
#endif
return (0);
case KDDISABIO: /* disallow io operations (default) */
#if defined(__i386__)
td->td_frame->tf_eflags &= ~PSL_IOPL;
#elif defined(__amd64__)
td->td_frame->tf_rflags &= ~PSL_IOPL;
#endif
return (0);
case KDMKTONE: /* sound the bell */
vtterm_beep(tm, *(u_int *)data);
return (0);
case KIOCSOUND: /* make tone (*data) hz */
/* TODO */
return (0);
case CONS_SETKBD: /* set the new keyboard */
mtx_lock(&Giant);
error = 0;
if (vd->vd_keyboard == NULL ||
vd->vd_keyboard->kb_index != *(int *)data) {
kbd = kbd_get_keyboard(*(int *)data);
if (kbd == NULL) {
mtx_unlock(&Giant);
return (EINVAL);
}
i = kbd_allocate(kbd->kb_name, kbd->kb_unit,
(void *)vd, vt_kbdevent, vd);
if (i >= 0) {
if ((kbd = vd->vd_keyboard) != NULL) {
vt_save_kbd_state(vd->vd_curwindow, kbd);
kbd_release(kbd, (void *)vd);
}
kbd = vd->vd_keyboard = kbd_get_keyboard(i);
vt_update_kbd_mode(vd->vd_curwindow, kbd);
vt_update_kbd_state(vd->vd_curwindow, kbd);
} else {
error = EPERM; /* XXX */
}
}
mtx_unlock(&Giant);
return (error);
case CONS_RELKBD: /* release the current keyboard */
mtx_lock(&Giant);
error = 0;
if ((kbd = vd->vd_keyboard) != NULL) {
vt_save_kbd_state(vd->vd_curwindow, kbd);
error = kbd_release(kbd, (void *)vd);
if (error == 0) {
vd->vd_keyboard = NULL;
}
}
mtx_unlock(&Giant);
return (error);
case VT_ACTIVATE: {
int win;
win = *(int *)data - 1;
DPRINTF(5, "%s%d: VT_ACTIVATE ttyv%d ", SC_DRIVER_NAME,
VT_UNIT(vw), win);
if ((win >= VT_MAXWINDOWS) || (win < 0))
return (EINVAL);
return (vt_proc_window_switch(vd->vd_windows[win]));
}
case VT_GETACTIVE:
*(int *)data = vd->vd_curwindow->vw_number + 1;
return (0);
case VT_GETINDEX:
*(int *)data = vw->vw_number + 1;
return (0);
case VT_LOCKSWITCH:
/* TODO: Check current state, switching can be in progress. */
if ((*(int *)data) == 0x01)
vw->vw_flags |= VWF_VTYLOCK;
else if ((*(int *)data) == 0x02)
vw->vw_flags &= ~VWF_VTYLOCK;
else
return (EINVAL);
return (0);
case VT_OPENQRY:
VT_LOCK(vd);
for (i = 0; i < VT_MAXWINDOWS; i++) {
vw = vd->vd_windows[i];
if (vw == NULL)
continue;
if (!(vw->vw_flags & VWF_OPENED)) {
*(int *)data = vw->vw_number + 1;
VT_UNLOCK(vd);
return (0);
}
}
VT_UNLOCK(vd);
return (EINVAL);
case VT_WAITACTIVE: {
unsigned int idx;
error = 0;
idx = *(unsigned int *)data;
if (idx > VT_MAXWINDOWS)
return (EINVAL);
if (idx > 0)
vw = vd->vd_windows[idx - 1];
VT_LOCK(vd);
while (vd->vd_curwindow != vw && error == 0)
error = cv_wait_sig(&vd->vd_winswitch, &vd->vd_lock);
VT_UNLOCK(vd);
return (error);
}
case VT_SETMODE: { /* set screen switcher mode */
struct vt_mode *mode;
struct proc *p1;
mode = (struct vt_mode *)data;
DPRINTF(5, "%s%d: VT_SETMODE ", SC_DRIVER_NAME, VT_UNIT(vw));
if (vw->vw_smode.mode == VT_PROCESS) {
p1 = pfind(vw->vw_pid);
if (vw->vw_proc == p1 && vw->vw_proc != td->td_proc) {
if (p1)
PROC_UNLOCK(p1);
DPRINTF(5, "error EPERM\n");
return (EPERM);
}
if (p1)
PROC_UNLOCK(p1);
}
if (mode->mode == VT_AUTO) {
vw->vw_smode.mode = VT_AUTO;
vw->vw_proc = NULL;
vw->vw_pid = 0;
DPRINTF(5, "VT_AUTO, ");
if (vw == vw->vw_device->vd_windows[VT_CONSWINDOW])
cnavailable(vw->vw_terminal->consdev, TRUE);
/* were we in the middle of the vty switching process? */
if (finish_vt_rel(vw, TRUE, &s) == 0)
DPRINTF(5, "reset WAIT_REL, ");
if (finish_vt_acq(vw) == 0)
DPRINTF(5, "reset WAIT_ACQ, ");
return (0);
} else if (mode->mode == VT_PROCESS) {
if (!ISSIGVALID(mode->relsig) ||
!ISSIGVALID(mode->acqsig) ||
!ISSIGVALID(mode->frsig)) {
DPRINTF(5, "error EINVAL\n");
return (EINVAL);
}
DPRINTF(5, "VT_PROCESS %d, ", td->td_proc->p_pid);
bcopy(data, &vw->vw_smode, sizeof(struct vt_mode));
vw->vw_proc = td->td_proc;
vw->vw_pid = vw->vw_proc->p_pid;
if (vw == vw->vw_device->vd_windows[VT_CONSWINDOW])
cnavailable(vw->vw_terminal->consdev, FALSE);
} else {
DPRINTF(5, "VT_SETMODE failed, unknown mode %d\n",
mode->mode);
return (EINVAL);
}
DPRINTF(5, "\n");
return (0);
}
case VT_GETMODE: /* get screen switcher mode */
bcopy(&vw->vw_smode, data, sizeof(struct vt_mode));
return (0);
case VT_RELDISP: /* screen switcher ioctl */
/*
* This must be the current vty which is in the VT_PROCESS
* switching mode...
*/
if ((vw != vd->vd_curwindow) || (vw->vw_smode.mode !=
VT_PROCESS)) {
return (EINVAL);
}
/* ...and this process is controlling it. */
if (vw->vw_proc != td->td_proc) {
return (EPERM);
}
error = EINVAL;
switch(*(int *)data) {
case VT_FALSE: /* user refuses to release screen, abort */
if ((error = finish_vt_rel(vw, FALSE, &s)) == 0)
DPRINTF(5, "%s%d: VT_RELDISP: VT_FALSE\n",
SC_DRIVER_NAME, VT_UNIT(vw));
break;
case VT_TRUE: /* user has released screen, go on */
/* finish_vt_rel(..., TRUE, ...) should not be locked */
if (vw->vw_flags & VWF_SWWAIT_REL) {
if ((error = finish_vt_rel(vw, TRUE, &s)) == 0)
DPRINTF(5, "%s%d: VT_RELDISP: VT_TRUE\n",
SC_DRIVER_NAME, VT_UNIT(vw));
} else {
error = EINVAL;
}
return (error);
case VT_ACKACQ: /* acquire acknowledged, switch completed */
if ((error = finish_vt_acq(vw)) == 0)
DPRINTF(5, "%s%d: VT_RELDISP: VT_ACKACQ\n",
SC_DRIVER_NAME, VT_UNIT(vw));
break;
default:
break;
}
return (error);
}
return (ENOIOCTL);
}
static struct vt_window *
vt_allocate_window(struct vt_device *vd, unsigned int window)
{
struct vt_window *vw;
struct terminal *tm;
term_pos_t size;
struct winsize wsz;
vw = malloc(sizeof *vw, M_VT, M_WAITOK|M_ZERO);
vw->vw_device = vd;
vw->vw_number = window;
vw->vw_kbdmode = K_XLATE;
if ((vd->vd_flags & VDF_TEXTMODE) == 0) {
vw->vw_font = vtfont_ref(vt_font_assigned);
vt_compute_drawable_area(vw);
}
vt_termsize(vd, vw->vw_font, &size);
vt_winsize(vd, vw->vw_font, &wsz);
tm = vw->vw_terminal = terminal_alloc(&vt_termclass, vw);
vw->vw_buf.vb_terminal = tm; /* must be set before vtbuf_init() */
vtbuf_init(&vw->vw_buf, &size);
terminal_set_winsize(tm, &wsz);
vd->vd_windows[window] = vw;
callout_init(&vw->vw_proc_dead_timer, 1);
return (vw);
}
void
vt_upgrade(struct vt_device *vd)
{
struct vt_window *vw;
unsigned int i;
int register_handlers;
if (!vty_enabled(VTY_VT))
return;
if (main_vd->vd_driver == NULL)
return;
for (i = 0; i < VT_MAXWINDOWS; i++) {
vw = vd->vd_windows[i];
if (vw == NULL) {
/* New window. */
vw = vt_allocate_window(vd, i);
}
if (!(vw->vw_flags & VWF_READY)) {
callout_init(&vw->vw_proc_dead_timer, 1);
terminal_maketty(vw->vw_terminal, "v%r", VT_UNIT(vw));
vw->vw_flags |= VWF_READY;
if (vw->vw_flags & VWF_CONSOLE) {
/* For existing console window. */
EVENTHANDLER_REGISTER(shutdown_pre_sync,
vt_window_switch, vw, SHUTDOWN_PRI_DEFAULT);
}
}
}
VT_LOCK(vd);
if (vd->vd_curwindow == NULL)
vd->vd_curwindow = vd->vd_windows[VT_CONSWINDOW];
register_handlers = 0;
if (!(vd->vd_flags & VDF_ASYNC)) {
/* Attach keyboard. */
vt_allocate_keyboard(vd);
/* Init 25 Hz timer. */
callout_init_mtx(&vd->vd_timer, &vd->vd_lock, 0);
/*
* Start timer when everything ready.
* Note that the operations here are purposefully ordered.
* We need to ensure vd_timer_armed is non-zero before we set
* the VDF_ASYNC flag. That prevents this function from
* racing with vt_resume_flush_timer() to update the
* callout structure.
*/
atomic_add_acq_int(&vd->vd_timer_armed, 1);
vd->vd_flags |= VDF_ASYNC;
callout_reset(&vd->vd_timer, hz / VT_TIMERFREQ, vt_timer, vd);
register_handlers = 1;
}
VT_UNLOCK(vd);
/* Refill settings with new sizes. */
vt_resize(vd);
if (register_handlers) {
/* Register suspend/resume handlers. */
EVENTHANDLER_REGISTER(power_suspend_early, vt_suspend_handler,
vd, EVENTHANDLER_PRI_ANY);
EVENTHANDLER_REGISTER(power_resume, vt_resume_handler, vd,
EVENTHANDLER_PRI_ANY);
}
}
static void
vt_resize(struct vt_device *vd)
{
struct vt_window *vw;
int i;
for (i = 0; i < VT_MAXWINDOWS; i++) {
vw = vd->vd_windows[i];
VT_LOCK(vd);
/* Assign default font to window, if not textmode. */
if (!(vd->vd_flags & VDF_TEXTMODE) && vw->vw_font == NULL)
vw->vw_font = vtfont_ref(vt_font_assigned);
VT_UNLOCK(vd);
/* Resize terminal windows */
while (vt_change_font(vw, vw->vw_font) == EBUSY) {
DPRINTF(100, "%s: vt_change_font() is busy, "
"window %d\n", __func__, i);
}
}
}
static void
vt_replace_backend(const struct vt_driver *drv, void *softc)
{
struct vt_device *vd;
vd = main_vd;
if (vd->vd_flags & VDF_ASYNC) {
/* Stop vt_flush periodic task. */
VT_LOCK(vd);
vt_suspend_flush_timer(vd);
VT_UNLOCK(vd);
/*
* Mute current terminal until we done. vt_change_font (called
* from vt_resize) will unmute it.
*/
terminal_mute(vd->vd_curwindow->vw_terminal, 1);
}
/*
* Reset VDF_TEXTMODE flag, driver who require that flag (vt_vga) will
* set it.
*/
VT_LOCK(vd);
vd->vd_flags &= ~VDF_TEXTMODE;
if (drv != NULL) {
/*
* We want to upgrade from the current driver to the
* given driver.
*/
vd->vd_prev_driver = vd->vd_driver;
vd->vd_prev_softc = vd->vd_softc;
vd->vd_driver = drv;
vd->vd_softc = softc;
vd->vd_driver->vd_init(vd);
} else if (vd->vd_prev_driver != NULL && vd->vd_prev_softc != NULL) {
/*
* No driver given: we want to downgrade to the previous
* driver.
*/
const struct vt_driver *old_drv;
void *old_softc;
old_drv = vd->vd_driver;
old_softc = vd->vd_softc;
vd->vd_driver = vd->vd_prev_driver;
vd->vd_softc = vd->vd_prev_softc;
vd->vd_prev_driver = NULL;
vd->vd_prev_softc = NULL;
vd->vd_flags |= VDF_DOWNGRADE;
vd->vd_driver->vd_init(vd);
if (old_drv->vd_fini)
old_drv->vd_fini(vd, old_softc);
vd->vd_flags &= ~VDF_DOWNGRADE;
}
VT_UNLOCK(vd);
/* Update windows sizes and initialize last items. */
vt_upgrade(vd);
#ifdef DEV_SPLASH
if (vd->vd_flags & VDF_SPLASH)
vtterm_splash(vd);
#endif
if (vd->vd_flags & VDF_ASYNC) {
/* Allow to put chars now. */
terminal_mute(vd->vd_curwindow->vw_terminal, 0);
/* Rerun timer for screen updates. */
vt_resume_flush_timer(vd->vd_curwindow, 0);
}
/*
* Register as console. If it already registered, cnadd() will ignore
* it.
*/
termcn_cnregister(vd->vd_windows[VT_CONSWINDOW]->vw_terminal);
}
static void
vt_suspend_handler(void *priv)
{
struct vt_device *vd;
vd = priv;
vd->vd_flags |= VDF_SUSPENDED;
if (vd->vd_driver != NULL && vd->vd_driver->vd_suspend != NULL)
vd->vd_driver->vd_suspend(vd);
}
static void
vt_resume_handler(void *priv)
{
struct vt_device *vd;
vd = priv;
if (vd->vd_driver != NULL && vd->vd_driver->vd_resume != NULL)
vd->vd_driver->vd_resume(vd);
vd->vd_flags &= ~VDF_SUSPENDED;
}
void
vt_allocate(const struct vt_driver *drv, void *softc)
{
if (!vty_enabled(VTY_VT))
return;
if (main_vd->vd_driver == NULL) {
main_vd->vd_driver = drv;
printf("VT: initialize with new VT driver \"%s\".\n",
drv->vd_name);
} else {
/*
* Check if have rights to replace current driver. For example:
* it is bad idea to replace KMS driver with generic VGA one.
*/
if (drv->vd_priority <= main_vd->vd_driver->vd_priority) {
printf("VT: Driver priority %d too low. Current %d\n ",
drv->vd_priority, main_vd->vd_driver->vd_priority);
return;
}
printf("VT: Replacing driver \"%s\" with new \"%s\".\n",
main_vd->vd_driver->vd_name, drv->vd_name);
}
vt_replace_backend(drv, softc);
}
void
vt_deallocate(const struct vt_driver *drv, void *softc)
{
if (!vty_enabled(VTY_VT))
return;
if (main_vd->vd_prev_driver == NULL ||
main_vd->vd_driver != drv ||
main_vd->vd_softc != softc)
return;
printf("VT: Switching back from \"%s\" to \"%s\".\n",
main_vd->vd_driver->vd_name, main_vd->vd_prev_driver->vd_name);
vt_replace_backend(NULL, NULL);
}
void
vt_suspend(struct vt_device *vd)
{
int error;
if (vt_suspendswitch == 0)
return;
/* Save current window. */
vd->vd_savedwindow = vd->vd_curwindow;
/* Ask holding process to free window and switch to console window */
vt_proc_window_switch(vd->vd_windows[VT_CONSWINDOW]);
/* Wait for the window switch to complete. */
error = 0;
VT_LOCK(vd);
while (vd->vd_curwindow != vd->vd_windows[VT_CONSWINDOW] && error == 0)
error = cv_wait_sig(&vd->vd_winswitch, &vd->vd_lock);
VT_UNLOCK(vd);
}
void
vt_resume(struct vt_device *vd)
{
if (vt_suspendswitch == 0)
return;
/* Switch back to saved window, if any */
vt_proc_window_switch(vd->vd_savedwindow);
vd->vd_savedwindow = NULL;
}
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