Commit Graph

1988 Commits

Author SHA1 Message Date
Bruce Evans
9fa18570a2 Obtained from: partly from ancient patches of mine via 1.1.5
Introduce TS_CONNECTED and TS_ZOMBIE states.  TS_CONNECTED is set
while a connection is established.  It is set while (TS_CARR_ON or
CLOCAL is set) and TS_ZOMBIE is clear.  TS_ZOMBIE is set for on to
off transitions of TS_CARR_ON that occur when CLOCAL is clear and
is cleared for off to on transitions of CLOCAL.  I/o can only occur
while TS_CONNECTED is set.  TS_ZOMBIE prevents further i/o.

Split the input-event sleep address TSA_CARR_ON(tp) into TSA_CARR_ON(tp)
and TSA_HUP_OR_INPUT(tp).  The former address is now used only for
off to on carrier transitions and equivalent CLOCAL transitions.
The latter is used for all input events, all carrier transitions
and certain CLOCAL transitions.  There are some harmless extra
wakeups for rare connection- related events.  Previously there were
too many extra wakeups for non-rare input events.

Drivers now call l_modem() instead of setting TS_CARR_ON directly
to handle even the initial off to on transition of carrier.  They
should always have done this.  l_modem() now handles TS_CONNECTED
and TS_ZOMBIE as well as TS_CARR_ON.

gnu/isdn/iitty.c:
Set TS_CONNECTED for first open ourself to go with bogusly setting
CLOCAL.

i386/isa/syscons.c, i386/isa/pcvt/pcvt_drv.c:
We fake carrier, so don't also fake CLOCAL.

kern/tty.c:
Testing TS_CONNECTED instead of TS_CARR_ON fixes TIOCCONS forgetting to
test CLOCAL.  TS_ISOPEN was tested instead, but that broke when we disabled
the clearing of TS_ISOPEN for certain transitions of CLOCAL.

Testing TS_CONNECTED fixes ttyselect() returning false success for output
to devices in state !TS_CARR_ON && !CLOCAL.

Optimize the other selwakeup() call (this is not related to the other
changes).

kern/tty_pty.c:
ptcopen() can be declared in traditional C now that dev_t isn't short.
1995-07-31 21:02:00 +00:00
Bruce Evans
f3b37f91c1 Improve input flow control.
Use input buffer watermarks of TTYHOG-512 (high) and (high)*7/8
(low) instead of TTYHOG/2 (high) and TTYHOG/5 (low) to agree with
some drivers.  512 is magic and some things depended on TTYHOG/2
>= TTYHOG-512 to work; now they depend on the 512 magic not changing
and TTYHOG-512 being significantly larger than 0.  This should be
handled in ttsetwater().

Separate the decision about whether to do input flow control from
doing it.  ttyblock() now just starts input flow control (hardware
and/or software) and there is a new function ttyunblock() to stop
it.  The decisions are the same except for the watermark changes
and allowing for input expansion for PARMRK.

When flushing input, try harder at first to send a start character
if required, but give up if the first attempt fails.

cy.c, rc.c, sio.c:
Simplify: let ttyinput() handle input flow control if it is not
being bypassed.  Use ttyblock() to start flow control otherwise.

rc.c:
Use same input flow control test as elsewhere: test in a more
efficient order and start flow control at >= highwater instead of
at > highwater.
1995-07-31 18:29:51 +00:00
Peter Dufault
c8bb1269a8 Return the correct number of I/O ports as part of the probe so that the
conflict resolution works.
1995-07-31 09:38:21 +00:00
Justin T. Gibbs
185363acb2 Long overdue, more complete, reset code. These changes implement a
BUS DEVICE RESET followed by BUS RESET failure recovery strategy including
the necesary renegotiation of sync/wide transfers after recovery completes.

Clean up debugging code to make it more finely selectable.  Reset code
debugging is enabled for now so I can get more feedback on how this
code behaves in real life.
1995-07-31 08:25:36 +00:00
David Greenman
a705fd3e48 Fix a bug in my disabled version of trap_pfault()...curpcb may be NULL even
when curproc isn't. This condition occurs at system startup and perhaps
at other times.
1995-07-30 17:49:24 +00:00
Bruce Evans
d49c99ba9c Fix enough of the recently introduced brokenness for LINT to compile.
The U6850* changes in sound_config.h are probably wrong.

Recent commits lost:
- include paths.
- copyrights.
- cvs Ids.
- infamous whitespace changes.
- other cosmetic changes.
1995-07-29 14:20:54 +00:00
Paul Richards
73f0203186 The lemac driver didn't pass transmitted packets to bpf. Now it does.
Reviewed by:
Submitted by:
Obtained from:
1995-07-29 13:00:17 +00:00
Bruce Evans
28f8db1403 Eliminate sloppy common-style declarations. There should be none left for
the LINT configuation.
1995-07-29 11:44:31 +00:00
Bruce Evans
772ec2b7a9 Removed the poorly named unused bogus common variable `total'. It was
obsoleted by the VM_METER sysctl a long time ago.
1995-07-29 10:47:05 +00:00
Bruce Evans
611c22c117 Don't let IXOFF or ECHONL stop the setting of TS_CAN_BYPASS_L_RINT. IXOFF
is handled at a low level, and ECHONL only applies if ICANON is set,
although tty.c sometimes bogusly applies it when ICANON isn't set.
1995-07-29 08:33:13 +00:00
Bruce Evans
4ce7d32178 Always wake up writers after clearing TS_BUSY. This will soon be
essential when I fix excessive wakeups for output-below-low-water.
In cy.c and sio.c, wake up via the driver start routine to also
eliminate duplicated code involving the clearing of TS_TTSTOP.

Always (except in code to be replaced soon) call driver start
routine directly instead of going through ttstart().
1995-07-29 04:05:57 +00:00
Jordan K. Hubbard
8000cec155 This file got left out for some reason - merge it in with the rest of
the VOXWARE 3.05 stuff.
Submitted by:	Amancio Hasty and Jim Lowe
Obtained from: Hannu Savolainen
1995-07-28 23:37:32 +00:00
Jordan K. Hubbard
8bdcfa2a8b Merge in changes for VOXWARE 3.05
Submitted by:	Amancio Hasty and Jim Lowe
1995-07-28 22:30:53 +00:00
Jordan K. Hubbard
550eed9cb5 Support for voxware 3.05.
Submitted by:	Amancio Hasty and Jim Lowe
1995-07-28 22:25:52 +00:00
Jordan K. Hubbard
ae28ee13b4 Update the sound driver to VOXWARE 3.05 with one GUS patch from
Amancio.  There is some SoundSource support here that is primitive and
probably doesn't work, but I'll let the two submitters let me know
how my integration of that was since I don't have this card to test.
I've only tested this on my GUS MAX since it's all I have.

This all probably needs to be re-done anyway since we're widely variant
from the original VOXWARE source in the current layout.
Submitted by:	Amancio Hasty and Jim Lowe
Obtained from:  Hannu Savolainen
1995-07-28 21:40:49 +00:00
David Greenman
c5bb0d718c Fixed bug where a bogus packet length could cause a panic if the length
was less than sizeof(struct ed_ring).
1995-07-28 12:15:16 +00:00
David Greenman
6b837e5dda Fixed bug I introduced with the memory-size code rewrite that broke
floppy DMA buffers...use avail_start not "first". Removed duplicate
(and wrong) declaration of phys_avail[].

Submitted by:	Bruce Evans, but fixed differently by me.
1995-07-28 11:21:06 +00:00
Bruce Evans
3e3de3f369 Change bogus extern inline' to static inline'.
This finishes making the kernel compile without -O.

The "optimized" asm version of the function being inlined
(translate_bytes()) uses slow instructions.  On a 486, assuming
everything is in the cache (unlikely), it is 21/15 times slower
than the dumb C version and 21/3 times slower than the best
possible bytewise method.
1995-07-25 23:03:22 +00:00
Bruce Evans
1c85ed9abd Change memcmp() to bcmp(). memcmp() isn't declared or implemented
for the kernel, but gcc provides an inline version of it if the
kernel is compiled with -O.
1995-07-25 22:18:56 +00:00
Bruce Evans
8089a0432e Fix bogus constraint "i" that only worked with -O. The cases where it
didn't work are somewhat bogusly optimized away before the constraint
is checked.  We still expect constants passed to inline functions to
remain constant, but if the compiler ever decides that they aren't
constant then it will just generate slightly slower code instead of
an error.
1995-07-25 21:28:47 +00:00
Bruce Evans
e150a6d25b Restore the the fix in revision 1.23 that was blown away by a later commit:
remove unused variable `u_char bt_scratch_buf[256];'.
1995-07-25 16:06:06 +00:00
Bruce Evans
3ba7df0ba7 First step of fixing the remaining sloppy common-style declarations.
Declare `cheat' as static.  It was bogusly shared between the aha1742 and
ultrastor drivers.

Even static variables should have unique names so that they can be
debugged, but fixing them can wait.
1995-07-25 15:53:11 +00:00
Bruce Evans
9c0dc173cc Change install' to ${INSTALL}' so that default install flags can be
specified in the top level Makefiles.
1995-07-25 00:37:58 +00:00
Bruce Evans
5542b158d8 Fix clean rule to remove remove everything that isn't created by config
except .depend and `version'.
1995-07-22 23:55:41 +00:00
Bruce Evans
d348ccec2e Fix clean rule for aic7xxx_asm. 1995-07-22 23:53:30 +00:00
Joerg Wunsch
f6027d9b3d this avaids the "lineoverflow" which you'll always get at 80 column
displays at bootup

Reviewed by:
Submitted by:	graichen@omega.physik.fu-berlin.de (Thomas Graichen)
Obtained from:
1995-07-22 22:32:49 +00:00
Bruce Evans
abe8bea470 Obtained from: partly from ancient patches of mine via 1.1.5
Give names to the magic tty i/o sleep addresses and use them.  This makes
it easier to remember what the addresses are for and to keep them unique.
1995-07-22 16:45:22 +00:00
Bruce Evans
3ec9b35e8a Remove vat_audio driver support here too.
Clean up formatting for reserved and Talisman driver entries.

Fix d_select entry for unused driver.
1995-07-22 13:56:06 +00:00
Bruce Evans
a16721a13a Move the inline code for waking up writers to a new function
ttwwakeup().  The conditions for doing the wakeup will soon become
more complicated and I don't want them duplicated in all drivers.

It's probably not worth making ttwwakeup() a macro or an inline
function.  The cost of the function call is relatively small when
there is a process to wake up.  There is usually a process to wake
up for large writes and the system call overhead dwarfs the function
call overhead for small writes.
1995-07-22 01:30:45 +00:00
Bruce Evans
2ce42987d3 Obtained from: partly from ancient patches of mine via 1.1.5
Move static termioschars() from a couple of drivers to tty.c.  Now there
is only one copy of ttydefchars[].
1995-07-21 22:52:01 +00:00
Bruce Evans
0d1de831ea Obtained from: partly from an ancient patch of mine via 1.1.5
Temporarily nuke TS_WOPEN.  It was only used for the obscure MDMBUF
flow control option in the kernel and for informational purposes
in `pstat -t'.  The latter worked properly only for ptys.  In
general there may be multiple processes sleeping in open() and
multiple processes that successfully opened the tty by opening it
in O_NONBLOCK mode or during a window when CLOCAL was set.  tty.c
doesn't have enough information to maintain the flag but always
cleared it in ttyopen().

TS_WOPEN should be restored someday just so that `pstat -t' can
display it (MDMBUF is already fixed).  Fixing it requires counting
of processes sleeping in open() in too many serial drivers.
1995-07-21 16:30:59 +00:00
Paul Traina
cfb5972713 Remove vat_audio driver support 1995-07-20 16:31:22 +00:00
David Greenman
e9857eee2b Rewrote memory sizing code to generally deal with holes in extended memory.
This code change should allow certain Compaq machines with a 128K hole
at 16MB to work.
1995-07-19 06:37:12 +00:00
Justin T. Gibbs
eb62827d8a Specify the controller bus in the scsi_link structure to allow hardwired
buses on multi-bus controllers.  Currently only affects the 274xT controllers.

Reviewed by: Peter Dufault(dufault@hda.com), Rod Grimes(rgrimes@FreeBSD.org)
1995-07-17 23:35:16 +00:00
Justin T. Gibbs
4fbaf9a7c0 Add examples for wiring down scbuses to drivers as well as specifying
controller buses for multi-bus controllers.
1995-07-17 23:32:53 +00:00
David Greenman
6263a19a10 Added crdselect definition for !NCRD case. 1995-07-16 14:34:57 +00:00
Peter Wemm
1174c7d121 This fixes a compiler warning, and a cosmetic problem with the linux
emul code when compiling with "options KTRACE".
ktrsyscall() was expecting an array of integers, this was passing the
address of a structure containing an array of integers..
The cosmetic problem was that it was calling the "enter syscall"
trace hook twice - this looks like a cut/paste error/typo.
1995-07-16 14:10:55 +00:00
Poul-Henning Kamp
8a7580c3fe Reviewed by: phk
Submitted by:	Andrew McRae <andrew@mega.com.au>

Some initial commits from the pcmcia stuff, to make life easier for the
testers.

We will use the name "pccard" since that is really the buzzword at present.
1995-07-16 10:45:06 +00:00
Poul-Henning Kamp
7a2dada545 Make the bootinfo structure visible from sysctl.
This can be used in libdisk to guess a better bios-geometry.
1995-07-16 10:33:38 +00:00
Joerg Wunsch
446cee6e6d Include ``options POWERFAIL_NMI'' for owners of older (non-apm)
notebooks where a powerfail condition (external power drop; battery
state low) is signalled by an NMI.  Makes it beep instead of panicing.

Reviewed by:	davidg
1995-07-16 10:31:26 +00:00
Bruce Evans
97e156674d Don't include <sys/tty.h> in drivers that aren't tty drivers or in general
files that don't depend on the internals of <sys/tty.h>
1995-07-16 10:13:08 +00:00
Bruce Evans
1be9be9647 Fix compiler warnings (systm.h wasn't included). 1995-07-16 10:07:40 +00:00
Bruce Evans
567e21c2c0 Add tw. 1995-07-16 08:55:04 +00:00
David Greenman
9e951f36f1 Truncate the fault address to a page boundry when calling vm_fault(). The
last change to fix the fault-twice bug with page tables wasn't quite
complete.
1995-07-16 05:39:22 +00:00
David Greenman
4a67eb7121 Fixed bug that caused page tables to be faulted twice instead of once.
Submitted by:	John Dyson
1995-07-14 09:25:51 +00:00
Jordan K. Hubbard
2c3c9fc440 The following patch for v1.8 (2.0.5R) of seagate.c allows it to work with
Future Domain TMC-885 controllers. These beasts were just different enough in
a number of perverse ways to be recognised but not work with the seagate
stuff. I also whacked in blind transfers for DATAIN and DATAOUT phases - this
more than doubles my throughput. If you're dubious about that, comment out the
definition of SEA_BLINDTRANSFER. Anyway if you're running an ST01 or TMC-950
controller, please give this a go, I'd like to see if anything's broken for
those beasts.

Submitted by:	Stephen Hocking <sysseh@devetir.qld.gov.au>
1995-07-13 15:01:38 +00:00
David Greenman
24a1cce34f NOTE: libkvm, w, ps, 'top', and any other utility which depends on struct
proc or any VM system structure will have to be rebuilt!!!

Much needed overhaul of the VM system. Included in this first round of
changes:

1) Improved pager interfaces: init, alloc, dealloc, getpages, putpages,
   haspage, and sync operations are supported. The haspage interface now
   provides information about clusterability. All pager routines now take
   struct vm_object's instead of "pagers".

2) Improved data structures. In the previous paradigm, there is constant
   confusion caused by pagers being both a data structure ("allocate a
   pager") and a collection of routines. The idea of a pager structure has
   escentially been eliminated. Objects now have types, and this type is
   used to index the appropriate pager. In most cases, items in the pager
   structure were duplicated in the object data structure and thus were
   unnecessary. In the few cases that remained, a un_pager structure union
   was created in the object to contain these items.

3) Because of the cleanup of #1 & #2, a lot of unnecessary layering can now
   be removed. For instance, vm_object_enter(), vm_object_lookup(),
   vm_object_remove(), and the associated object hash list were some of the
   things that were removed.

4) simple_lock's removed. Discussion with several people reveals that the
   SMP locking primitives used in the VM system aren't likely the mechanism
   that we'll be adopting. Even if it were, the locking that was in the code
   was very inadequate and would have to be mostly re-done anyway. The
   locking in a uni-processor kernel was a no-op but went a long way toward
   making the code difficult to read and debug.

5) Places that attempted to kludge-up the fact that we don't have kernel
   thread support have been fixed to reflect the reality that we are really
   dealing with processes, not threads. The VM system didn't have complete
   thread support, so the comments and mis-named routines were just wrong.
   We now use tsleep and wakeup directly in the lock routines, for instance.

6) Where appropriate, the pagers have been improved, especially in the
   pager_alloc routines. Most of the pager_allocs have been rewritten and
   are now faster and easier to maintain.

7) The pagedaemon pageout clustering algorithm has been rewritten and
   now tries harder to output an even number of pages before and after
   the requested page. This is sort of the reverse of the ideal pagein
   algorithm and should provide better overall performance.

8) Unnecessary (incorrect) casts to caddr_t in calls to tsleep & wakeup
   have been removed. Some other unnecessary casts have also been removed.

9) Some almost useless debugging code removed.

10) Terminology of shadow objects vs. backing objects straightened out.
    The fact that the vm_object data structure escentially had this
    backwards really confused things. The use of "shadow" and "backing
    object" throughout the code is now internally consistent and correct
    in the Mach terminology.

11) Several minor bug fixes, including one in the vm daemon that caused
    0 RSS objects to not get purged as intended.

12) A "default pager" has now been created which cleans up the transition
    of objects to the "swap" type. The previous checks throughout the code
    for swp->pg_data != NULL were really ugly. This change also provides
    the rudiments for future backing of "anonymous" memory by something
    other than the swap pager (via the vnode pager, for example), and it
    allows the decision about which of these pagers to use to be made
    dynamically (although will need some additional decision code to do
    this, of course).

13) (dyson) MAP_COPY has been deprecated and the corresponding "copy
    object" code has been removed. MAP_COPY was undocumented and non-
    standard. It was furthermore broken in several ways which caused its
    behavior to degrade to MAP_PRIVATE. Binaries that use MAP_COPY will
    continue to work correctly, but via the slightly different semantics
    of MAP_PRIVATE.

14) (dyson) Sharing maps have been removed. It's marginal usefulness in a
    threads design can be worked around in other ways. Both #12 and #13
    were done to simplify the code and improve readability and maintain-
    ability. (As were most all of these changes)

TODO:

1) Rewrite most of the vnode pager to use VOP_GETPAGES/PUTPAGES. Doing
   this will reduce the vnode pager to a mere fraction of its current size.

2) Rewrite vm_fault and the swap/vnode pagers to use the clustering
   information provided by the new haspage pager interface. This will
   substantially reduce the overhead by eliminating a large number of
   VOP_BMAP() calls. The VOP_BMAP() filesystem interface should be
   improved to provide both a "behind" and "ahead" indication of
   contiguousness.

3) Implement the extended features of pager_haspage in swap_pager_haspage().
   It currently just says 0 pages ahead/behind.

4) Re-implement the swap device (swstrategy) in a more elegant way, perhaps
   via a much more general mechanism that could also be used for disk
   striping of regular filesystems.

5) Do something to improve the architecture of vm_object_collapse(). The
   fact that it makes calls into the swap pager and knows too much about
   how the swap pager operates really bothers me. It also doesn't allow
   for collapsing of non-swap pager objects ("unnamed" objects backed by
   other pagers).
1995-07-13 08:48:48 +00:00
Bruce Evans
d800e06858 Fix races in scstart(). q_to_b() wasn't called at spltty(), so there
were two races:
- q_to_b() might unexpectedly return 0 (e.g, after a keyboard signal
  flushes the output queue and isn't echoed).  ansi_put() interprets
  0 bytes as 4GB...
- more output (e.g. for echoes) might arrive afer q_to_b() returns 0.
  Then scstart() returns presumably and the new output might not be
  handled for a long time.

Remove unused function scxint().

Fix prototypes (foo() isn't a prototype).
1995-07-11 18:34:30 +00:00
Bruce Evans
f2fb20ef41 Speed up the inner loop of ansi_put() by a few percent.
syscons' output is now only about 4-5 times slower than I want.
It loses a factor of 2 for scrolling output by unnecessarily copying
the screen buffer, a factor of 4/3 for dumb OPOST processing, and
a factor of 3/2 for clist processing.
1995-07-11 17:59:22 +00:00
Bruce Evans
7fbcd76bb5 Enable pcvt in LINT and don't generate a compile time error if syscons
and pcvt are both configured when LINT is defined.  There will be a
link time error instead.  This is to test building of pcvt more often.
1995-07-11 17:20:20 +00:00