cinap_lenrek [Sat, 3 Jan 2015 17:33:35 +0000 (18:33 +0100)]
devvga: disable hardware blanking when switching drivers, check softscreen
we have to reset hwblank when switching drivers to
prevent the generic vgablank() to be called by
blankscreen().
remove code setting hwblank from vga drivers as
devvga will always force hwblank to be 1 or 0
depending on if the driver provides a native blanking
routine.
set hwaccel to 1 when the driver provides native fill
and scroll routines independent of softscreen being
disabled. this allows hw acceleration to be used when
softscreen gets switched off.
cinap_lenrek [Fri, 2 Jan 2015 16:07:47 +0000 (17:07 +0100)]
devvga: better way to prevent blank hwaccel race
don't hold drawlock duing vga enable and disable, but just zero
the function pointers under drawlock *before* disabling the vga
device.
holding the drawlock while calling out into enable and disable
is not a good idea. with vgavesa, this might deadlock when
userspace realemu tries to print in a rio window with vgavesa.
cinap_lenrek [Fri, 2 Jan 2015 14:29:15 +0000 (15:29 +0100)]
vgavesa: get rid of the vesa kproc
in 9front, screen blanking is always initiated from process context,
so there is no need for a kproc anymore.
care has been taken for the race between vesadisable() and vesablank()
by acquiering the drawlock prior calling scr->dev->enable() and
scr->dev->disable(). this also has the side effect of accelerated
fills and scrolls not being called during device disable.
ftrvxmtrx [Fri, 2 Jan 2015 12:24:27 +0000 (13:24 +0100)]
aux/vga: fix switching with different mode
Prior to switching display, switch to text mode 3, which
is supported by anything, then set display, search for the
desired mode, load it if found. If not found, set the display
to the old one and switch to the old mode back.
cinap_lenrek [Tue, 30 Dec 2014 11:44:42 +0000 (12:44 +0100)]
libmemdraw: never point Buffer.alpha to nil (thanks mischief)
the boolcopy optimization doesnt doesnt use Buffer.alpha, tho
the debug function dumpbuf() still can dereference it. to keep
it simple, always have Buffer.alpha point to the channel or
&ones when not used.
stanley lieber [Sun, 28 Dec 2014 20:29:02 +0000 (15:29 -0500)]
vga font: the existing bitmaps contained blank spaces for missing runes, which resulted in blanks being printed on screen. replace bitmaps and update .font files accordingly.
mischief [Sun, 28 Dec 2014 07:38:21 +0000 (23:38 -0800)]
ircrc: use aux/trampoline or tlsclient for connections, add -T flag for tls
previously ircrc dialed through /net itself and resolved ips on its own. this prevented the use of an ip address, and also prevented use of ipv6. now you can use an ip, or a dns name that resolves to ipv6. the -T flag is also added to use tlsclient for encrypted connections.
ftrvxmtrx [Fri, 26 Dec 2014 14:40:06 +0000 (15:40 +0100)]
vga, vesa: scaling modes
At least on some NVIDIA cards the default scaling mode makes
black borders visible on all sides, even on native resolution.
This patch adds a generic "scaling MODE" command to vgactl
and adds support for it on VESA through NVIDIA VBE OEM extension.
It hasn't been tested on any other video cards, but shouldn't
break anything as the scaling mode is only set on write to vgactl.
cinap_lenrek [Thu, 25 Dec 2014 10:30:29 +0000 (11:30 +0100)]
zynq: only tmpmap() while splhi(), remove unneeded coherence() after tmpunmap(), splhi() in l2free()
we have to call tmpmap() with interrupts disabled as the map
is a per cpu and a interrupt can preempt us while we where
commited to use a entry but *before* we wrote it!
tmpunmap() already calls coherence() before flushpg() so it
is not needed after tmpunmap().
splhi() in l2free() isnt needed as l2free() is always called
with interrupts disabled from mmuswitch() and mmurelease().
cinap_lenrek [Wed, 24 Dec 2014 19:53:58 +0000 (20:53 +0100)]
zynq: fpsave() and fpclear() both need to disable the fpu
fpsave needs to disable the fpu! otherwise we won't catch
the mathtrap() in the kernel or when context switching to
another process that will attempt to use it.
cinap_lenrek [Sun, 21 Dec 2014 16:25:55 +0000 (17:25 +0100)]
ip: exclude "don't fragment" bit from ipv4 reassembly test
other operating systems always set the "don't fragment" bit
in ther outgoing ipv4 packets causing us to unnecesarily
call ip4reassemble() looking for a fragment reassembly queue.
the change excludes the "don't fragment" bit from the test
so we now call ip4reassemble() only when the "more fragmens"
bit is set or a fragment offset other than zero is given.
cinap_lenrek [Sun, 21 Dec 2014 03:46:22 +0000 (04:46 +0100)]
kernel: avoid inconsistent reads in /proc/#/fd and /proc/#/ns
to allow bytewise access to /proc/#/fd, the contents of the file where
recreated on each call. if fd's had been closed or reassigned between
the reads, the offset would be inconsistent and a read could start off
in the middle of a line. this happens when you cat /proc/#/fd file of
a busy process that mutates its filedescriptor table.
to fix this, we now return one line record at a time. if the line
fits in the read size, then this means the next read will always start
at the beginning of the next line record. we remember the consumed
byte count in Chan.mrock and the current record in Chan.nrock. (these
fields are free to usefor non-directory files)
if a read comes in and the offset is the same as c->mrock, we do not
need to regenerate the file and just render the next c->nrock's record.
for reads smaller than the line count, we have to regenerate the content
up to the offset and the race is still possible, but this should not
be the common case.
the same algorithm is now used for /proc/#/ns file, allowing a simpler
reimplementation and getting rid of Mntwalk state strcture.