Date: Wed, 27 Aug 2014 10:04:11 +0000 (UTC) From: Jean-Sebastien Pedron <dumbbell@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r270705 - in head/sys: dev/vt kern sys Message-ID: <201408271004.s7RA4B5D075878@svn.freebsd.org>
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Author: dumbbell Date: Wed Aug 27 10:04:10 2014 New Revision: 270705 URL: http://svnweb.freebsd.org/changeset/base/270705 Log: vt(4): Add cngrab() and cnungrab() callbacks They are used when a panic occurs or when entering a DDB session for instance. cngrab() forces a vt-switch to the console window, no matter if the original window is another terminal or an X session. However, cnungrab() doesn't vt-switch back to the original window currently. MFC after: 1 week Modified: head/sys/dev/vt/vt.h head/sys/dev/vt/vt_core.c head/sys/kern/subr_terminal.c head/sys/sys/terminal.h Modified: head/sys/dev/vt/vt.h ============================================================================== --- head/sys/dev/vt/vt.h Wed Aug 27 09:57:27 2014 (r270704) +++ head/sys/dev/vt/vt.h Wed Aug 27 10:04:10 2014 (r270705) @@ -261,6 +261,8 @@ struct vt_window { term_rect_t vw_draw_area; /* (?) Drawable area. */ unsigned int vw_number; /* (c) Window number. */ int vw_kbdmode; /* (?) Keyboard mode. */ + int vw_prev_kbdmode;/* (?) Previous mode. */ + int vw_grabbed; /* (?) Grab count. */ char *vw_kbdsq; /* Escape sequence queue*/ unsigned int vw_flags; /* (d) Per-window flags. */ int vw_mouse_level;/* Mouse op mode. */ Modified: head/sys/dev/vt/vt_core.c ============================================================================== --- head/sys/dev/vt/vt_core.c Wed Aug 27 09:57:27 2014 (r270704) +++ head/sys/dev/vt/vt_core.c Wed Aug 27 10:04:10 2014 (r270705) @@ -70,6 +70,9 @@ 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; @@ -86,6 +89,9 @@ const struct terminal_class vt_termclass .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, @@ -191,6 +197,7 @@ static struct vt_window vt_conswindow = .vw_device = &vt_consdev, .vw_terminal = &vt_consterm, .vw_kbdmode = K_XLATE, + .vw_grabbed = 0, }; static struct terminal vt_consterm = { .tm_class = &vt_termclass, @@ -1202,6 +1209,64 @@ vtterm_cngetc(struct terminal *tm) } static void +vtterm_cngrab(struct terminal *tm) +{ + struct vt_device *vd; + struct vt_window *vw; + keyboard_t *kbd; + + vw = tm->tm_softc; + vd = vw->vw_device; + + if (!cold) + vt_window_switch(vw); + + kbd = kbd_get_keyboard(vd->vd_keyboard); + if (kbd == NULL) + return; + + if (vw->vw_grabbed++ > 0) + return; + + /* + * 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; + (void)kbdd_ioctl(kbd, KDSKBMODE, (caddr_t)&vw->vw_kbdmode); + + kbdd_poll(kbd, TRUE); +} + +static void +vtterm_cnungrab(struct terminal *tm) +{ + struct vt_device *vd; + struct vt_window *vw; + keyboard_t *kbd; + + vw = tm->tm_softc; + vd = vw->vw_device; + + kbd = kbd_get_keyboard(vd->vd_keyboard); + if (kbd == NULL) + return; + + if (--vw->vw_grabbed > 0) + return; + + kbdd_poll(kbd, FALSE); + + vw->vw_kbdmode = vw->vw_prev_kbdmode; + (void)kbdd_ioctl(kbd, KDSKBMODE, (caddr_t)&vw->vw_kbdmode); + kbdd_disable(kbd); +} + +static void vtterm_opened(struct terminal *tm, int opened) { struct vt_window *vw = tm->tm_softc; Modified: head/sys/kern/subr_terminal.c ============================================================================== --- head/sys/kern/subr_terminal.c Wed Aug 27 09:57:27 2014 (r270704) +++ head/sys/kern/subr_terminal.c Wed Aug 27 10:04:10 2014 (r270705) @@ -476,13 +476,17 @@ termcn_cnregister(struct terminal *tm) static void termcn_cngrab(struct consdev *cp) { + struct terminal *tm = cp->cn_arg; + tm->tm_class->tc_cngrab(tm); } static void termcn_cnungrab(struct consdev *cp) { + struct terminal *tm = cp->cn_arg; + tm->tm_class->tc_cnungrab(tm); } static void Modified: head/sys/sys/terminal.h ============================================================================== --- head/sys/sys/terminal.h Wed Aug 27 09:57:27 2014 (r270704) +++ head/sys/sys/terminal.h Wed Aug 27 10:04:10 2014 (r270705) @@ -155,6 +155,9 @@ typedef void tc_done_t(struct terminal * typedef void tc_cnprobe_t(struct terminal *tm, struct consdev *cd); typedef int tc_cngetc_t(struct terminal *tm); +typedef void tc_cngrab_t(struct terminal *tm); +typedef void tc_cnungrab_t(struct terminal *tm); + typedef void tc_opened_t(struct terminal *tm, int opened); typedef int tc_ioctl_t(struct terminal *tm, u_long cmd, caddr_t data, struct thread *td); @@ -175,6 +178,10 @@ struct terminal_class { tc_cnprobe_t *tc_cnprobe; tc_cngetc_t *tc_cngetc; + /* DDB & panic handling. */ + tc_cngrab_t *tc_cngrab; + tc_cnungrab_t *tc_cnungrab; + /* Misc. */ tc_opened_t *tc_opened; tc_ioctl_t *tc_ioctl;
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