The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.
Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix
This is useful to the DRM drivers to let them know if a device is
effectively used by the console.
Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D38089
While at it optimise "case 3" into a default.
This way there is no need to initialize the "mark" variable in the beginning,
because all cases set it.
MFC after: 1 week
Sponsored by: NVIDIA Networking
Differential Revision: https://reviews.freebsd.org/D36042
It simplifies the declaration of the driver structures a little. There
are no current consumers of this macro, in fact it looks like it was
added for exactly this purpose.
This decreases the scope of some variables, so rework the initialization
in vt_init_logos() such that it doesn't require them.
No functional change intended.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D34820
Add the glue needed to listen to TP_SETBELLPD which teken uses to
inform its client drivers about the results of parsing
\e[=<pitch>;<duration>B. It converts these to a Hz value for the
tone/pitch of the bell and a duration in ms. There's some loss of
precision because <pitch> in the escape seuquence is defined to be
(1193182 / pitch) Hz and <duration> is in 10ms units. Also note that
kbdcontrol also parses 'off' but then doesn't send the proper escape
sequence, leading me to wonder if that's another bug since teken
appears to parse that sequence properly and I've added code here to
treat that as the same as quiet or disabled.
In general, Hz from 100 to 2000 is good. Outside that range is possible,
but even at 100Hz the square wave is starting to sound bad and above
2000Hz the speaker may not respond.
Reviewed by: mav
Differential Revision: https://reviews.freebsd.org/D32620
These ones were unambiguous cases where the Foundation was the only
listed copyright holder (in the associated license block).
Sponsored by: The FreeBSD Foundation
When a break-to-debugger is triggered, kdb will grab the console and vt(4)
will generally switch back to ttyv0. If one issues a continue from the
debugger, then kdb will ungrab the console and the system rolls on.
This change adds a perhaps minor feature: when we're down to grab == 0 and
if vt actually switched away to ttyv0, switch back to the tty it was
previously on before the console was grabbed.
The justification behind this is that a typical flow is to work in
!ttyv0 to avoid console spam while occasionally dropping to ddb to inspect
system state before returning. This could easily enough be tossed behind
a sysctl or something if it's not generally appreciated, but I anticipate
indifference.
Reviewed by: ray
Differential Revision: https://reviews.freebsd.org/D27110
Prepare support to be able to handle font data in loader, consolidate
data structures to sys/font.h and update vtfontcvt.
vtfontcvt update is about to output set of glyphs in form of C source,
the implementation does allow to output compressed or uncompressed font
bitmaps.
Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D24189
Extract scrollback buffer initialization into a common routine, used both
during vt(4) init and in handling the CONS_CLRHIST ioctl.
PR: 224436
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D24815
This effectively reverts r355935, but is functionally equivalent. We gain no
benefit from storing the index and repeatedly fetching the keyboard with
`kbd_get_keyboard` when we need it. We'll be notified when it's going away
so we can clean up the pointer.
All existing references were trivially converted. Only once instance
actually needed the index.
the foreground and background colours. In bitblt_text functions, compare
values to this cache and don't re-draw the characters if they haven't changed.
When invalidating the display, clear this cache in order to force characters
to be redrawn; also force full redraws between suspend/resume pairs since odd
artifacts can otherwise result.
When scrolling the display (which is where most time is spent within the vt
driver) this yields a significant performance improvement if most lines are
less than the width of the terminal, since this avoids re-drawing blanks on
top of blanks.
(Note that "re-drawing" here includes writing to the VGA text mode buffer; on
virtualized systems this can be extremely slow since it triggers a glyph
being rendered onto a 640x480 screen).
On a c5.4xlarge EC2 instance (with emulated text mode VGA) this cuts the time
spent in vt(4) during the kernel boot from 1200 ms to 700ms; on my laptop
(with a 3200x1800 display) the corresponding time is reduced from 970 ms down
to 155 ms.
Reviewed by: imp, cem
Approved by: re (gjb)
Relnotes: Significant speedup in vt(4) and the system boot generally.
Differential Revision: https://reviews.freebsd.org/D16723
There is no need to try to resume it after each smaller operations
(putchar, cursor_position, copy, fill).
The resume function already checks if the timer is armed before doing
anything, but it uses an atomic cmpset which is expensive. And resuming
the timer at the end of input processing is enough.
While here, we also skip timer resume if the input is for another
windows than the currently displayed one. I.e. if `ttyv0` is currently
displayed, any changes to `ttyv1` shouldn't resume the timer (which
would refresh `ttyv0`).
By doing the same benchmark as r333669, I get:
* vt(4), before r333669: 1500 ms
* vt(4), with this patch: 760 ms
* syscons(4): 700 ms
... to process input, instead of inside each smaller operations such as
appending a character or moving the cursor forward.
In other words, before we were doing (oversimplified):
teken_input()
<for each input character>
vtterm_putchar()
VTBUF_LOCK()
VTBUF_UNLOCK()
vtterm_cursor_position()
VTBUF_LOCK()
VTBUF_UNLOCK()
Now, we are doing:
vtterm_pre_input()
VTBUF_LOCK()
teken_input()
<for each input character>
vtterm_putchar()
vtterm_cursor_position()
vtterm_post_input()
VTBUF_UNLOCK()
The situation was even worse when the vtterm_copy() and vtterm_fill()
callbacks were involved.
The new callbacks are:
* struct terminal_class->tc_pre_input()
* struct terminal_class->tc_post_input()
They are called in teken_input(), surrounding the while() loop.
The goal is to improve input processing speed of vt(4). As a benchmark,
here is the time taken to write a text file of 360 000 lines (26 MiB) on
`ttyv0`:
* vt(4), unmodified: 1500 ms
* vt(4), with this patch: 1200 ms
* syscons(4): 700 ms
This is on a Haswell laptop with a GENERIC-NODEBUG kernel.
At the same time, the locking is changed in the vt_flush() function
which is responsible to draw the text on screen. So instead of
(indirectly) using VTBUF_LOCK() just to read and reset the dirty area
of the internal buffer, the lock is held for about the entire function,
including the drawing part.
The change is mostly visible while content is scrolling fast: before,
lines could appear garbled while scrolling because the internal buffer
was accessed without locks (once the scrolling was finished, the output
was correct). Now, the scrolling appears correct.
In the end, the locking model is closer to what syscons(4) does.
Differential Revision: https://reviews.freebsd.org/D15302
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
And rename "DEFAULT" constants to the more accurate "MAX."
PR: 210382
Submitted by: Felix <felixphew0 at gmail.com>
Reviewed by: wblock, cem
Tested by: Dave Cottlehuber <dch at skunkwerks.at>
size as defined by VT_FB_DEFAULT_WIDTH and VT_FB_DEFAULT_HEIGHT
(at this time 2048x1200). The default is really a max. We cap
the height and width to those defaults and position the screen
in the center of the frame buffer.
Ideally we use a bigger font to utility the entire real estate
that is the frame buffer, but that's seen as an improvement over
making it work first.
PR: 193745
This feature is inspired by another Unix-alike OS commonly found on
airplane headrests.
A number of beasties[0] are drawn at top of framebuffer during boot,
based on the number of active SMP CPUs[1]. Console buffer output
continues to scroll in the screen area below beastie(s)[2].
After some time[3] has passed, the beasties are erased leaving the
entire terminal for use.
Includes two 80x80 vga16 beastie graphics and an 80x80 vga16 orb
graphic. (The graphics are RLE compressed to save some space -- 3x 3200
bytes uncompressed, or 4208 compressed.)
[0]: The user may select the style of beastie with
kern.vt.splash_cpu_style=(0|1|2)
[1]: Or the number may be overridden with tunable kern.vt.splash_ncpu.
[2]: https://www.youtube.com/watch?v=UP2jizfr3_o
[3]: Configurable with kern.vt.splash_cpu_duration (seconds, def. 10).
Differential Revision: https://reviews.freebsd.org/D2181
Reviewed by: dumbbell, emaste
Approved by: markj (mentor)
MFC after: 2 weeks
Explicitly mark existing VT_SYSCTL_INTs static. This is in preparation for
D2181.
Reviewed by: dumbbell, emaste
Approved by: markj (mentor)
MFC after: 1 week
and is not applicable unless the integer pointer is NULL. Set it to
zero to avoid confusion. While at it remove extra semicolon at the end
of the "VT_SYSCTL_INT()" macro.
MFC after: 1 week
The main purpose of this feature is to be able to unload a KMS driver.
When going back from the current vt(4) backend to the previous backend,
the previous backend is reinitialized with the special VDF_DOWNGRADE
flag set. Then the current driver is terminated with the new "vd_fini"
callback.
In the case of vt_fb and vt_vga, this allows the former to pass the
vgapci device vt_fb used to vt_vga so the device can be rePOSTed.
Differential Revision: https://reviews.freebsd.org/D687
suspend/resume
The goal is to avoid that the vt(4) resume happens before the video
display is resumed. The original patch was provided by Andriy Gapon.
This new patch registers the handlers in vt_upgrade(). This is done
once, thanks to the VDF_ASYNC flag. I abused this flag because it was
already abused by the keyboard allocation. The event handlers then call
the backend if it provides callbacks for suspend/resume.
Differential Revision: https://reviews.freebsd.org/D1004
On behalf of: dumbbell
MFC after: 2 weeks
Therefore, to set histry size to 2000 lines, add the following line to
your kernel configuration file:
options SC_HISTORY_SIZE=2000
The default history remains at 500 lines.
MFC after: 1 week
Add new functions to manipulate these mode & state, instead of calling
kbdd_ioctl() everyhere.
This fixes at least two bugs:
1. The state of the Scroll Lock LED and the state of scroll mode
could be out-of-sync. For instance, if one enables scroll mode on
window #1 and switches to window #2, the LED would remain on, but
the window wouldn't be in scroll mode.
Similarily, when switching between a console and an X.Org
session, the LED states could be inconsistent with the real
state.
2. When exiting from an X.Org session, the user could be unable to
type anything. The workaround was to switch to another console
window and come back.
Differential Revision: https://reviews.freebsd.org/D821
Reviewed by: ray@
Approved by: ray@
Tested by: kwm@
MFC after: 3 days
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
With the current implementation, this allows an X11 server to tell
the console it switches a particular window in "graphics mode". This
information is used by the mouse handling code to ignore sysmouse events
in the window taken by the X server: only him should receive those
events.
Reported by: flo@, glebius@, kan@
Tested by: flo@
Reviewed by: kan@
MFC after: 1 week
This allows backends to verify they do not draw outside of this area.
This fixes a bug in vt_vga where the text was happily drawn over the
right and bottom margins, when using the Gallant font.
MFC after: 1 week
It's replaced by vd_bitblt_text_t, which gives more context to the
backend and allows it to perform more efficiently when redrawing a given
area.
MFC after: 1 week
There were situations where the cursor was not erased/redrawn or its
position was marked as dirty even though it's not displayed. The code is
now more straightforward.
At the same, add a function to determine if the cursor covers a given
area. This is used by backends to know if they need to draw the cursor.
This new function should be paired with a new state in struct vt_device,
called vd_mshown, which indicates if the cursor should be displayed.
This again simplifies vd_bitblt_text_t callback's API.
MFC after: 1 week
The previous global offset, based on the last loaded font, had no
meaning for other windows. This caused a shifted text area, often partly
out-of-screen.
MFC after: 1 week
Compared to the deprecated vd_bitbltchr_t callback, vd_bitblt_text_t
receives:
o the whole text buffer
o the dirty area
o the mouse cursor (map, position, colors)
This allows the backend to perform optimization on how to draw things.
The goal is to remove vd_bitbltchr_t and vd_putchar_t, once all driver
are converted (only vt_vga is included in this commit).
In vt_vga, this allows to draw the text and the cursor in one pass,
without ever reading from video memory (because it has all the context).
The main benefit is the speed improvement: no more slideshow during
boot!
Other bugs fixed in vt_vga are:
o left-most characters are drawn properly (the left-most pixels were
missing with bold characters and some wide letters such as 'm')
o no more black square around the cursor
o no cursor flickering when the text is scrolling
There are still many problems to fix: the known issues are marked with
"FIXME" inside the code.
MFC after: 1 week
At the same time, "w" and "h" members are now called "width" and
"height". The goal is to have a more "public" structure, because it will
soon be passed as argument to a new callback, replacing vd_bitbltchr_t.
MFC after: 1 week
This fixes bad looking refresh when switching window: squares instead
of text, flashing screen, and so on. In the worst case, vt_flush() came
at a very inappropriate timing and the screen was not refreshed at all
(leaving squares all over the place).
This doesn't fix the flickering of the screen with vt_vga, because the
sync signal is temporarily stopped and the video memory is cleared.
MFC after: 1 week
Currently, this has no effect, because the cursor is always redrawn
anyway. But this will be useful after improvements to the vd_bitbltchr_t
callback API.
The vt_device structure members used to store the position of the cursor
as of the last redraw are renamed from vd_mdirty{x,y} to vd_mold{x,y}.
The associated comment is fixed too. Also, their value is now expressed
in pixels, not in character columns/row.
MFC after: 1 week
