Commit Graph

738 Commits

Author SHA1 Message Date
Pedro F. Giffuni
453130d9bf sys/dev: minor spelling fixes.
Most affect comments, very few have user-visible effects.
2016-05-03 03:41:25 +00:00
Pedro F. Giffuni
4ed3c0e713 sys: Make use of our rounddown() macro when sys/param.h is available.
No functional change.
2016-04-30 14:41:18 +00:00
Dag-Erling Smørgrav
23e6278ed9 Replace the cosine table with a sine table, which (due to the vagaries of
rounding) has better spread.  Implement fp16_sin() to go along with
fp16_cos().  In the rendering loop, switch from addition to subtraction
so the center of the pattern will be a trough rather than a peak.  This
is completely arbitrary, of course, but looks better to me.
2016-01-02 16:40:37 +00:00
Dag-Erling Smørgrav
a50b01d224 17 years and change after I wrote warp_saver, here's a simple plasma effect
(currently only three circular patterns) which requires quite a bit of
fixed-point arithmetic, including sqrt() and cos().  Happy New Year!
2016-01-01 04:04:40 +00:00
Mark Murray
d1b06863fb Huge cleanup of random(4) code.
* GENERAL
- Update copyright.
- Make kernel options for RANDOM_YARROW and RANDOM_DUMMY. Set
  neither to ON, which means we want Fortuna
- If there is no 'device random' in the kernel, there will be NO
  random(4) device in the kernel, and the KERN_ARND sysctl will
  return nothing. With RANDOM_DUMMY there will be a random(4) that
  always blocks.
- Repair kern.arandom (KERN_ARND sysctl). The old version went
  through arc4random(9) and was a bit weird.
- Adjust arc4random stirring a bit - the existing code looks a little
  suspect.
- Fix the nasty pre- and post-read overloading by providing explictit
  functions to do these tasks.
- Redo read_random(9) so as to duplicate random(4)'s read internals.
  This makes it a first-class citizen rather than a hack.
- Move stuff out of locked regions when it does not need to be
  there.
- Trim RANDOM_DEBUG printfs. Some are excess to requirement, some
  behind boot verbose.
- Use SYSINIT to sequence the startup.
- Fix init/deinit sysctl stuff.
- Make relevant sysctls also tunables.
- Add different harvesting "styles" to allow for different requirements
  (direct, queue, fast).
- Add harvesting of FFS atime events. This needs to be checked for
  weighing down the FS code.
- Add harvesting of slab allocator events. This needs to be checked for
  weighing down the allocator code.
- Fix the random(9) manpage.
- Loadable modules are not present for now. These will be re-engineered
  when the dust settles.
- Use macros for locks.
- Fix comments.

* src/share/man/...
- Update the man pages.

* src/etc/...
- The startup/shutdown work is done in D2924.

* src/UPDATING
- Add UPDATING announcement.

* src/sys/dev/random/build.sh
- Add copyright.
- Add libz for unit tests.

* src/sys/dev/random/dummy.c
- Remove; no longer needed. Functionality incorporated into randomdev.*.

* live_entropy_sources.c live_entropy_sources.h
- Remove; content moved.
- move content to randomdev.[ch] and optimise.

* src/sys/dev/random/random_adaptors.c src/sys/dev/random/random_adaptors.h
- Remove; plugability is no longer used. Compile-time algorithm
  selection is the way to go.

* src/sys/dev/random/random_harvestq.c src/sys/dev/random/random_harvestq.h
- Add early (re)boot-time randomness caching.

* src/sys/dev/random/randomdev_soft.c src/sys/dev/random/randomdev_soft.h
- Remove; no longer needed.

* src/sys/dev/random/uint128.h
- Provide a fake uint128_t; if a real one ever arrived, we can use
  that instead. All that is needed here is N=0, N++, N==0, and some
  localised trickery is used to manufacture a 128-bit 0ULLL.

* src/sys/dev/random/unit_test.c src/sys/dev/random/unit_test.h
- Improve unit tests; previously the testing human needed clairvoyance;
  now the test will do a basic check of compressibility. Clairvoyant
  talent is still a good idea.
- This is still a long way off a proper unit test.

* src/sys/dev/random/fortuna.c src/sys/dev/random/fortuna.h
- Improve messy union to just uint128_t.
- Remove unneeded 'static struct fortuna_start_cache'.
- Tighten up up arithmetic.
- Provide a method to allow eternal junk to be introduced; harden
  it against blatant by compress/hashing.
- Assert that locks are held correctly.
- Fix the nasty pre- and post-read overloading by providing explictit
  functions to do these tasks.
- Turn into self-sufficient module (no longer requires randomdev_soft.[ch])

* src/sys/dev/random/yarrow.c src/sys/dev/random/yarrow.h
- Improve messy union to just uint128_t.
- Remove unneeded 'staic struct start_cache'.
- Tighten up up arithmetic.
- Provide a method to allow eternal junk to be introduced; harden
  it against blatant by compress/hashing.
- Assert that locks are held correctly.
- Fix the nasty pre- and post-read overloading by providing explictit
  functions to do these tasks.
- Turn into self-sufficient module (no longer requires randomdev_soft.[ch])
- Fix some magic numbers elsewhere used as FAST and SLOW.

Differential Revision: https://reviews.freebsd.org/D2025
Reviewed by: vsevolod,delphij,rwatson,trasz,jmg
Approved by: so (delphij)
2015-06-30 17:00:45 +00:00
Andriy Gapon
85f95fffd7 hook userland threads suspend + resume into acpi suspend code
Also, split power_suspend into power_suspend and power_suspend_early.

power_suspend_early is called before the userland is frozen.
power_suspend is called after the userland is frozen.

Currently only VT switching is hooked to power_suspend_early.
This is needed because switching away from X server requires its
cooperation, so obviously X server must not be frozen when that happens.

Freezing userland during ACPI suspend is useful because not all drivers
correctly handle suspension concurrent with other activity.  This is
especially applicable to drivers ported from other operating systems
that suspend all software activity between placing drivers and hardware
into suspended state.
In particular drm2/radeon (radeonkms) depends on the described
procedure.  The driver does not have any internal synchronization
between suspension activities and processing of userland requests.

Many thanks to kib for the code that allows to freeze and thaw all
userland threads.

Note that ideally we also need to park / inhibit (non-special) kernel
threads as well to ensure that they do not call into drivers.

MFC after:	17 days
2015-01-27 17:33:18 +00:00
Xin LI
a1ff3f20f9 Fix sos@'s name.
MFC after:	2 weeks
2015-01-07 21:44:57 +00:00
Hans Petter Selasky
af3b2549c4 Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
Glen Barber
37a107a407 Revert r267961, r267973:
These changes prevent sysctl(8) from returning proper output,
such as:

 1) no output from sysctl(8)
 2) erroneously returning ENOMEM with tools like truss(1)
    or uname(1)
 truss: can not get etype: Cannot allocate memory
2014-06-27 22:05:21 +00:00
Ed Maste
59644098f8 Use a common tunable to choose between vt(4)/sc(4)
With this change and previous work from ray@ it will be possible to put
both in GENERIC, and have one enabled by default, but allow the other to
be selected via the loader.

(The previous implementation had separate kern.vt.disable and
hw.syscons.disable tunables, and would panic if both drivers were
compiled in and neither was explicitly disabled.)

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2014-06-27 17:50:33 +00:00
Hans Petter Selasky
3da1cf1e88 Extend the meaning of the CTLFLAG_TUN flag to automatically check if
there is an environment variable which shall initialize the SYSCTL
during early boot. This works for all SYSCTL types both statically and
dynamically created ones, except for the SYSCTL NODE type and SYSCTLs
which belong to VNETs. A new flag, CTLFLAG_NOFETCH, has been added to
be used in the case a tunable sysctl has a custom initialisation
function allowing the sysctl to still be marked as a tunable. The
kernel SYSCTL API is mostly the same, with a few exceptions for some
special operations like iterating childrens of a static/extern SYSCTL
node. This operation should probably be made into a factored out
common macro, hence some device drivers use this. The reason for
changing the SYSCTL API was the need for a SYSCTL parent OID pointer
and not only the SYSCTL parent OID list pointer in order to quickly
generate the sysctl path. The motivation behind this patch is to avoid
parameter loading cludges inside the OFED driver subsystem. Instead of
adding special code to the OFED driver subsystem to post-load tunables
into dynamically created sysctls, we generalize this in the kernel.

Other changes:
- Corrected a possibly incorrect sysctl name from "hw.cbb.intr_mask"
to "hw.pcic.intr_mask".
- Removed redundant TUNABLE statements throughout the kernel.
- Some minor code rewrites in connection to removing not needed
TUNABLE statements.
- Added a missing SYSCTL_DECL().
- Wrapped two very long lines.
- Avoid malloc()/free() inside sysctl string handling, in case it is
called to initialize a sysctl from a tunable, hence malloc()/free() is
not ready when sysctls from the sysctl dataset are registered.
- Bumped FreeBSD version to indicate SYSCTL API change.

MFC after:	2 weeks
Sponsored by:	Mellanox Technologies
2014-06-27 16:33:43 +00:00
Aleksandr Rybalko
3fc3ca2652 Allow to disable syscons(4) if "hw.syscons.disable" kenv is set.
Sponsored by:	The FreeBSD Foundation
2014-06-18 22:23:10 +00:00
Julio Merino
50b9fb4657 Fix comment introduced in r262480: it's 1920x1200, not 1980x1200.
PR:		kern/180558
MFC after:	5 days
2014-02-25 23:04:39 +00:00
Julio Merino
478b27042c Increase maximum number of columns to support 1980x1200 displays.
In my specific case, this fixes the problem of my PowerMac G5 displaying a
4:3 console on a 16:10 display with black bars on the left and right.

PR:		kern/180558
Reviewed by:	nwhitehorn
MFC after:	5 days
2014-02-25 13:48:05 +00:00
Ed Schouten
a6c26592f1 Extend libteken to support CJK fullwidth characters.
Introduce a new formatting bit (TF_CJK_RIGHT) that is set when putting a
cell that is the right part of a CJK fullwidth character. This will
allow drivers like vt(9) to support fullwidth characters properly.

emaste@ has a patch to extend vt(9)'s font handling to increase the
number of Unicode -> glyph maps from 2 ({normal,bold)} to 4
({normal,bold} x {left,right}). This will need to use this formatting
bit to determine whether to draw the left or right glyph.

Reviewed by:	emaste
2013-12-20 21:31:50 +00:00
Mark Murray
f02e47dc1e Snapshot. This passes the build test, but has not yet been finished or debugged.
Contains:

* Refactor the hardware RNG CPU instruction sources to feed into
the software mixer. This is unfinished. The actual harvesting needs
to be sorted out. Modified by me (see below).

* Remove 'frac' parameter from random_harvest(). This was never
used and adds extra code for no good reason.

* Remove device write entropy harvesting. This provided a weak
attack vector, was not very good at bootstrapping the device. To
follow will be a replacement explicit reseed knob.

* Separate out all the RANDOM_PURE sources into separate harvest
entities. This adds some secuity in the case where more than one
is present.

* Review all the code and fix anything obviously messy or inconsistent.
Address som review concerns while I'm here, like rename the pseudo-rng
to 'dummy'.

Submitted by:	Arthur Mesh <arthurmesh@gmail.com> (the first item)
2013-10-04 06:55:06 +00:00
Jung-uk Kim
ba53f0d5ca Reload font when syscons(4) is resuming without switching mode.
Reported by:	adrian (more than a year ago)
Prodded by:	adrian (less than a month ago)
2013-07-17 23:29:56 +00:00
Konstantin Belousov
1dc72d3681 On some generations of the Intel GPU, disabling of the VGA Display
stops updating the vertical retrace indicator.  The text mouse
renderer in syscons is executing from the callout and spins waiting
for the start of next frame.  As result, after the X server finishes,
since the VGA cannot be turned on, but syscons does not know about
this, the clock swi spins forever.

Hack around the problem by disabling wait for the retrace if KMS is
activated.

Diagnosed and tested by:	Michiel Boland <boland37@xs4all.nl>
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2013-06-18 20:19:09 +00:00
Davide Italiano
6b98f11545 MFcalloutng (r244249, r244306 by mav):
- Switch syscons from timeout() to callout_reset_flags() and specify that
precision is not important there -- anything from 20 to 30Hz will be fine.
- Reduce syscons "refresh" rate to 1-2Hz when console is in graphics mode
and there is nothing to do except some polling for keyboard.  Text mode
refresh would also be nice to have adaptive, but this change at least
should help laptop users who running X.

Sponsored by:	Google Summer of Code 2012, iXsystems inc.
Tested by:	flo, marius, ian, markj, Fabian Keil
2013-03-04 14:00:58 +00:00
Hans Petter Selasky
68fdacf7c5 Make sure that all mouse buttons are released when clients
using /dev/consolectl close. This fixes a problem where if
a USB mouse is detached while a button is pressed, that
button is never released.

MFC after:	1 week
2013-02-06 11:16:18 +00:00
Ed Schouten
305921c48e Add tty_set_winsize().
This removes some of the signalling magic from the Syscons driver and
puts it in the TTY layer, where it belongs.
2012-11-03 22:21:37 +00:00
Oleksandr Tymoshenko
e1f04cd024 Piggyback MIPS changes and add ARM syscons support for devices with
framebuffer

While here - sort #if defined() order alphabetically
2012-08-25 23:59:31 +00:00
Robert Watson
8122a592ee Provide basic glue to allow syscons to be used on MIPS, modelled
on PowerPC support.  This was clearly not something syscons was
designed to do (very specific assumptions about the nature of VGA
consoles on PCs), but fortunately others have long since blazed
the way on making it work regardless of that.

Sponsored by:	DARPA, AFRL
2012-08-25 08:09:37 +00:00
Hans Petter Selasky
d1eacc02f1 Move tty_opened_ns() into syscons.c which is currently the
only client of this macro.

Suggested by:	ed @
MFC after:	1 week
2012-03-29 15:47:29 +00:00
Hans Petter Selasky
8dbeb1b6cc Fix for NULL-pointer panic during boot, if keys are pressed too early.
MFC after:	1 week
2012-03-29 14:53:14 +00:00
Ulrich Spörlein
9a14aa017b Convert files to UTF-8 2012-01-15 13:23:18 +00:00
Andriy Gapon
b133becced sc_cngrab: switch to console vty when possible
In the future we may want to perform the switch even if the console is
currently in the graphics mode by trying to reset the video adapter first
(e.g. by executing vesa/vga bios post).  That would probably require
some sort of a one-way flag as returning the control of the console back
to the interrupted application most likely would result in a mess.

Reviewed by:	emaste
MFC after:	2 months
2011-12-21 12:21:22 +00:00
Andriy Gapon
8f3ae92165 syscons: provide a first iteration of cngrab/cnungrab implementation
- put underlying keyboard(s) into the polling mode for the whole
  duration of the grab, instead of the previous behavior of going into
  and out of the polling mode around each polling attempt
- ditto for setting K_XLATE mode and enabling a disabled keyboard

Inspired by:	bde
MFC after:	2 months
2011-12-17 15:57:39 +00:00
Andriy Gapon
9976156f12 kern cons: introduce infrastructure for console grabbing by kernel
At the moment grab and ungrab methods of all console drivers are no-ops.

Current intended meaning of the calls is that the kernel takes control of
console input.  In the future the semantics may be extended to mean that
the calling thread takes full ownership of the console (e.g. console
output from other threads could be suspended).

Inspired by:	bde
MFC after:	2 months
2011-12-17 15:08:43 +00:00
Andriy Gapon
8538a18594 syscons: make sc_puts static as it is used only privately
Perhaps sc_puts should also be renamed to scputs to follow the implied
naming conventions in the file...

MFC after:	2 weeks
2011-12-11 21:10:11 +00:00
Ed Schouten
6472ac3d8a Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.
The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.
2011-11-07 15:43:11 +00:00
Robert Millan
a2c22d416d Add a few improvements to utf-8 -> cp436 console map
(mostly with Catalan characters in mind, but it probably
benefits other languages).

The new mappings are as follows:

▮ -> █
ÀÈÍÏÓÒÚ -> AEIIOOU
ŀ / Ŀ -> l / L

Reviewed by:	ed
Approved by:	kib (mentor)
2011-10-28 20:00:30 +00:00
Kip Macy
8451d0dd78 In order to maximize the re-usability of kernel code in user space this
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel
entry points and all places in the code that use them. It also
fixes an additional name space collision between the kernel function
psignal and the libc function of the same name by renaming the kernel
psignal kern_psignal(). By introducing this change now we will ease future
MFCs that change syscalls.

Reviewed by:	rwatson
Approved by:	re (bz)
2011-09-16 13:58:51 +00:00
Robert Watson
a608af7817 Add support for alternative break-to-debugger to syscons(4). While most
keyboards allow console break sequences (such as ctrl-alt-esc) to be
entered, alternative break can prove useful under virtualisation and
remote console systems where entering control sequences can be
difficult or unreliable.

MFC after:	3 weeks
Approved by:	re (bz)
2011-08-27 22:10:45 +00:00
Robert Watson
4cf7545589 Attempt to make break-to-debugger and alternative break-to-debugger more
accessible:

(1) Always compile in support for breaking into the debugger if options
    KDB is present in the kernel.

(2) Disable both by default, but allow them to be enabled via tunables
    and sysctls debug.kdb.break_to_debugger and
    debug.kdb.alt_break_to_debugger.

(3) options BREAK_TO_DEBUGGER and options ALT_BREAK_TO_DEBUGGER continue
    to behave as before -- only now instead of compiling in
    break-to-debugger support, they change the default values of the
    above sysctls to enable those features by default.  Current kernel
    configurations should, therefore, continue to behave as expected.

(4) Migrate alternative break-to-debugger state machine logic out of
    individual device drivers into centralised KDB code.  This has a
    number of upsides, but also one downside: it's now tricky to release
    sio spin locks when entering the debugger, so we don't.  However,
    similar logic does not exist in other device drivers, including uart.

(5) dcons requires some special handling; unlike other console types, it
    allows overriding KDB's own debugger selection, so we need a new
    interface to KDB to allow that to work.

GENERIC kernels in -CURRENT will now support break-to-debugger as long as
appropriate boot/run-time options are set, which should improve the
debuggability of BETA kernels significantly.

MFC after:	3 weeks
Reviewed by:	kib, nwhitehorn
Approved by:	re (bz)
2011-08-26 21:46:36 +00:00
Ed Schouten
78d4d8eeb2 Restore binary compatibility for GIO_KEYMAP and PIO_KEYMAP.
Back in 2009 I changed the ABI of the GIO_KEYMAP and PIO_KEYMAP ioctls
to support wide characters. I created a patch to add ABI compatibility
for the old calls, but I didn't get any feedback to that.

It seems now people are upgrading from 8 to 9 they experience this
issue, so add it anyway.
2011-07-17 08:19:19 +00:00
Ed Schouten
7c9669276e Fix whitespace inconsistencies in the TTY layer and its drivers owned by me. 2011-06-26 18:26:20 +00:00
Jung-uk Kim
b10c3d1c15 Move VT switching hack for suspend/resume from bus drivers to syscons.c
using event handlers.  A different version was

Submitted by:	Taku YAMAMOTO (taku at tackymt dot homeip dot net)
2011-05-09 18:46:49 +00:00
Jung-uk Kim
1658038ce7 Rename a variable to match scvidctl.c. 2010-11-30 17:34:15 +00:00
Jung-uk Kim
732e8e1632 Stop hardcoding default font size. 2010-11-30 17:32:28 +00:00
Jung-uk Kim
fd7a9ebcca Clean up code a bit to make it more readable. 2010-11-30 16:46:15 +00:00
Jung-uk Kim
82515b4f1f Clean up code a bit to make it more readable. 2010-11-29 22:20:44 +00:00
Jung-uk Kim
0cb06f72d5 Honor font size for the video mode when default fonts are compiled in kernel
and VESA mode is enabled from loader.
2010-11-29 22:19:19 +00:00
Rebecca Cran
b1ce21c6ef Fix typos.
PR:	bin/148894
Submitted by:	olgeni
2010-11-09 10:59:09 +00:00
Rui Paulo
cd1fa5bd4d Explicitly tell the compiler that we don't care about the return value
of kbdd_ioctl().
2010-10-13 11:37:12 +00:00
Jung-uk Kim
a90b8833d2 Rework r210248. Although it fixed most of problems, it did not fix one
particular edge case where X-axis resolution is not multiple of font width.
Now we just advance enough scan lines, then deduct a partial scan line.
It is more intuitive than the previous code.  Apply the same wisdom to EGA
and VGA planar renderers for consistency.

Reported by:	David DEMELIER (demelier dot david at gmail dot com)
2010-09-17 23:09:31 +00:00
Jung-uk Kim
25a14f561c Improve style slightly. 2010-07-19 20:31:04 +00:00
Jung-uk Kim
490770af47 Fix two long-standing line wrapping bugs in VGA renderer for pixel mode.
Font size may be smaller than 16 and logical scan line may be larger than
the displayed scan line.

MFC after:	3 days
2010-07-19 18:56:18 +00:00
Jung-uk Kim
dd962f5b8a Suspend screen updates when the video controller is powered down. 2010-05-22 07:35:17 +00:00
Jung-uk Kim
3504769505 Correct beastie_saver module name. 2010-04-07 18:42:21 +00:00