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Move VT switching hack for suspend/resume from bus drivers to syscons.c

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using event handlers.  A different version was

Submitted by:	Taku YAMAMOTO (taku at tackymt dot homeip dot net)
This commit is contained in:
Jung-uk Kim 2011-05-09 18:46:49 +00:00
parent 65e7d70b09
commit b10c3d1c15
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=221708
4 changed files with 82 additions and 198 deletions
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98
sys/dev/syscons/syscons.c
View File

@ -104,7 +104,8 @@ static scr_stat main_console;
static struct tty *main_devs[MAXCONS];
static char init_done = COLD;
static char shutdown_in_progress = FALSE;
static int shutdown_in_progress = FALSE;
static int suspend_in_progress = FALSE;
static char sc_malloc = FALSE;
static int saver_mode = CONS_NO_SAVER; /* LKM/user saver */
@ -128,6 +129,13 @@ static void none_saver(sc_softc_t *sc, int blank) { }
static void (*current_saver)(sc_softc_t *, int) = none_saver;
#endif
#ifdef SC_NO_SUSPEND_VTYSWITCH
static int sc_no_suspend_vtswitch = 1;
#else
static int sc_no_suspend_vtswitch = 0;
#endif
static int sc_susp_scr;
SYSCTL_NODE(_hw, OID_AUTO, syscons, CTLFLAG_RD, 0, "syscons");
SYSCTL_NODE(_hw_syscons, OID_AUTO, saver, CTLFLAG_RD, 0, "saver");
SYSCTL_INT(_hw_syscons_saver, OID_AUTO, keybonly, CTLFLAG_RW,
@ -142,6 +150,9 @@ SYSCTL_INT(_hw_syscons, OID_AUTO, kbd_reboot, CTLFLAG_RW|CTLFLAG_SECURE, &enable
SYSCTL_INT(_hw_syscons, OID_AUTO, kbd_debug, CTLFLAG_RW|CTLFLAG_SECURE, &enable_kdbkey,
0, "enable keyboard debug");
#endif
TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", &sc_no_suspend_vtswitch);
SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
#if !defined(SC_NO_FONT_LOADING) && defined(SC_DFLT_FONT)
#include "font.h"
#endif
@ -170,7 +181,9 @@ static kbd_callback_func_t sckbdevent;
static void scinit(int unit, int flags);
static scr_stat *sc_get_stat(struct tty *tp);
static void scterm(int unit, int flags);
static void scshutdown(void *arg, int howto);
static void scshutdown(void *, int);
static void scsuspend(void *);
static void scresume(void *);
static u_int scgetc(sc_softc_t *sc, u_int flags);
#define SCGETC_CN 1
#define SCGETC_NONBLOCK 2
@ -518,10 +531,15 @@ sc_attach_unit(int unit, int flags)
printf("\n");
}
/* register a shutdown callback for the kernel console */
if (sc_console_unit == unit)
EVENTHANDLER_REGISTER(shutdown_pre_sync, scshutdown,
(void *)(uintptr_t)unit, SHUTDOWN_PRI_DEFAULT);
/* Register suspend/resume/shutdown callbacks for the kernel console. */
if (sc_console_unit == unit) {
EVENTHANDLER_REGISTER(power_suspend, scsuspend, NULL,
EVENTHANDLER_PRI_ANY);
EVENTHANDLER_REGISTER(power_resume, scresume, NULL,
EVENTHANDLER_PRI_ANY);
EVENTHANDLER_REGISTER(shutdown_pre_sync, scshutdown, NULL,
SHUTDOWN_PRI_DEFAULT);
}
for (vc = 0; vc < sc->vtys; vc++) {
if (sc->dev[vc] == NULL) {
@ -1718,7 +1736,7 @@ sccnupdate(scr_stat *scp)
{
/* this is a cut-down version of scrn_timer()... */
if (scp->sc->suspend_in_progress || scp->sc->font_loading_in_progress)
if (suspend_in_progress || scp->sc->font_loading_in_progress)
return;
if (debugger > 0 || panicstr || shutdown_in_progress) {
@ -1768,7 +1786,7 @@ scrn_timer(void *arg)
return;
/* don't do anything when we are performing some I/O operations */
if (sc->suspend_in_progress || sc->font_loading_in_progress) {
if (suspend_in_progress || sc->font_loading_in_progress) {
if (again)
timeout(scrn_timer, sc, hz / 10);
return;
@ -3007,16 +3025,64 @@ scterm(int unit, int flags)
}
static void
scshutdown(void *arg, int howto)
scshutdown(__unused void *arg, __unused int howto)
{
/* assert(sc_console != NULL) */
sc_touch_scrn_saver();
if (!cold && sc_console
&& sc_console->sc->cur_scp->smode.mode == VT_AUTO
&& sc_console->smode.mode == VT_AUTO)
sc_switch_scr(sc_console->sc, sc_console->index);
shutdown_in_progress = TRUE;
KASSERT(sc_console != NULL, ("sc_console != NULL"));
KASSERT(sc_console->sc != NULL, ("sc_console->sc != NULL"));
KASSERT(sc_console->sc->cur_scp != NULL,
("sc_console->sc->cur_scp != NULL"));
sc_touch_scrn_saver();
if (!cold &&
sc_console->sc->cur_scp->index != sc_console->index &&
sc_console->sc->cur_scp->smode.mode == VT_AUTO &&
sc_console->smode.mode == VT_AUTO)
sc_switch_scr(sc_console->sc, sc_console->index);
shutdown_in_progress = TRUE;
}
static void
scsuspend(__unused void *arg)
{
int retry;
KASSERT(sc_console != NULL, ("sc_console != NULL"));
KASSERT(sc_console->sc != NULL, ("sc_console->sc != NULL"));
KASSERT(sc_console->sc->cur_scp != NULL,
("sc_console->sc->cur_scp != NULL"));
sc_susp_scr = sc_console->sc->cur_scp->index;
if (sc_no_suspend_vtswitch ||
sc_susp_scr == sc_console->index) {
sc_touch_scrn_saver();
sc_susp_scr = -1;
return;
}
for (retry = 0; retry < 10; retry++) {
sc_switch_scr(sc_console->sc, sc_console->index);
if (!sc_console->sc->switch_in_progress)
break;
pause("scsuspend", hz);
}
suspend_in_progress = TRUE;
}
static void
scresume(__unused void *arg)
{
KASSERT(sc_console != NULL, ("sc_console != NULL"));
KASSERT(sc_console->sc != NULL, ("sc_console->sc != NULL"));
KASSERT(sc_console->sc->cur_scp != NULL,
("sc_console->sc->cur_scp != NULL"));
suspend_in_progress = FALSE;
if (sc_susp_scr < 0) {
mark_all(sc_console->sc->cur_scp);
return;
}
sc_switch_scr(sc_console->sc, sc_susp_scr);
}
int

1
sys/dev/syscons/syscons.h
View File

@ -230,7 +230,6 @@ typedef struct sc_softc {
char switch_in_progress;
char write_in_progress;
char blink_in_progress;
char suspend_in_progress;
struct mtx video_mtx;
long scrn_time_stamp;

127
sys/isa/syscons_isa.c
View File

@ -69,17 +69,6 @@ __FBSDID("$FreeBSD$");
static devclass_t sc_devclass;
static sc_softc_t main_softc;
#ifdef SC_NO_SUSPEND_VTYSWITCH
static int sc_no_suspend_vtswitch = 1;
#else
static int sc_no_suspend_vtswitch = 0;
#endif
static int sc_cur_scr;
TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", &sc_no_suspend_vtswitch);
SYSCTL_DECL(_hw_syscons);
SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
static void
scidentify(driver_t *driver, device_t parent)
@ -108,53 +97,6 @@ scattach(device_t dev)
SC_AUTODETECT_KBD));
}
static int
scsuspend(device_t dev)
{
int retry = 10;
sc_softc_t *sc;
sc = &main_softc;
if (sc->cur_scp == NULL)
return (0);
if (sc->suspend_in_progress == 0) {
sc_cur_scr = sc->cur_scp->index;
if (!sc_no_suspend_vtswitch && sc_cur_scr != 0)
do {
sc_switch_scr(sc, 0);
if (!sc->switch_in_progress)
break;
pause("scsuspend", hz);
} while (retry--);
}
sc->suspend_in_progress++;
return (0);
}
static int
scresume(device_t dev)
{
sc_softc_t *sc;
sc = &main_softc;
if (sc->cur_scp == NULL)
return (0);
sc->suspend_in_progress--;
if (sc->suspend_in_progress == 0) {
if (!sc_no_suspend_vtswitch && sc_cur_scr != 0)
sc_switch_scr(sc, sc_cur_scr);
else
mark_all(sc->cur_scp);
}
return (0);
}
int
sc_max_unit(void)
{
@ -300,8 +242,6 @@ static device_method_t sc_methods[] = {
DEVMETHOD(device_identify, scidentify),
DEVMETHOD(device_probe, scprobe),
DEVMETHOD(device_attach, scattach),
DEVMETHOD(device_suspend, scsuspend),
DEVMETHOD(device_resume, scresume),
{ 0, 0 }
};
@ -312,70 +252,3 @@ static driver_t sc_driver = {
};
DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
static devclass_t scpm_devclass;
static void
scpm_identify(driver_t *driver, device_t parent)
{
device_add_child(parent, "scpm", 0);
}
static int
scpm_probe(device_t dev)
{
device_set_desc(dev, SC_DRIVER_NAME " suspend/resume");
device_quiet(dev);
return (BUS_PROBE_DEFAULT);
}
static int
scpm_attach(device_t dev)
{
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static int
scpm_suspend(device_t dev)
{
int error;
error = bus_generic_suspend(dev);
if (error != 0)
return (error);
return (scsuspend(dev));
}
static int
scpm_resume(device_t dev)
{
scresume(dev);
return (bus_generic_resume(dev));
}
static device_method_t scpm_methods[] = {
DEVMETHOD(device_identify, scpm_identify),
DEVMETHOD(device_probe, scpm_probe),
DEVMETHOD(device_attach, scpm_attach),
DEVMETHOD(device_suspend, scpm_suspend),
DEVMETHOD(device_resume, scpm_resume),
{ 0, 0 }
};
static driver_t scpm_driver = {
"scpm",
scpm_methods,
0
};
DRIVER_MODULE(scpm, vgapm, scpm_driver, scpm_devclass, 0, 0);

54
sys/pc98/cbus/syscons_cbus.c
View File

@ -49,17 +49,6 @@ __FBSDID("$FreeBSD$");
static devclass_t sc_devclass;
static sc_softc_t main_softc;
#ifdef SC_NO_SUSPEND_VTYSWITCH
static int sc_no_suspend_vtswitch = 1;
#else
static int sc_no_suspend_vtswitch = 0;
#endif
static int sc_cur_scr;
TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", &sc_no_suspend_vtswitch);
SYSCTL_DECL(_hw_syscons);
SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
static void
scidentify(driver_t *driver, device_t parent)
@ -87,47 +76,6 @@ scattach(device_t dev)
return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
}
static int
scsuspend(device_t dev)
{
int retry = 10;
sc_softc_t *sc;
sc = &main_softc;
if (sc->cur_scp == NULL)
return (0);
sc_cur_scr = sc->cur_scp->index;
if (sc_no_suspend_vtswitch)
return (0);
do {
sc_switch_scr(sc, 0);
if (!sc->switch_in_progress) {
break;
}
pause("scsuspend", hz);
} while (retry--);
return (0);
}
static int
scresume(device_t dev)
{
sc_softc_t *sc;
if (sc_no_suspend_vtswitch)
return (0);
sc = &main_softc;
sc_switch_scr(sc, sc_cur_scr);
return (0);
}
int
sc_max_unit(void)
{
@ -242,8 +190,6 @@ static device_method_t sc_methods[] = {
DEVMETHOD(device_identify, scidentify),
DEVMETHOD(device_probe, scprobe),
DEVMETHOD(device_attach, scattach),
DEVMETHOD(device_suspend, scsuspend),
DEVMETHOD(device_resume, scresume),
{ 0, 0 }
};