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freebsd-nq/sys/sys/tty.h

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BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*-
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)tty.h 8.6 (Berkeley) 1/21/94
This uses an SLIST_ENTRY and breaks the build without sys/queue.h. Commit this until bde and friends finish arguing over what to do instead. :)
1999-08-09 06:50:07 +00:00
* $Id: tty.h,v 1.46 1999/08/08 20:24:48 phk Exp $
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Made them all idempotent. Reviewed by: Submitted by:
1994-08-21 04:42:17 +00:00
#ifndef _SYS_TTY_H_
Fix cblock starvation bugs by reserving enough cblocks for minimal operation of each clist. Limit the growth of each clist. Clists can only grow larger than the reserved minimum if there are free cblocks in a shared pool. The size of this pool is now fixed (this could be improved). The reserved and maximum sizes are more carefully allocated for slip and ppp, depending on the mtu. A maximum MTU of 16384 is now enforced for ppp.
1994-11-26 19:24:13 +00:00
#define _SYS_TTY_H_
Made them all idempotent. Reviewed by: Submitted by:
1994-08-21 04:42:17 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/termios.h>
#include <sys/select.h> /* For struct selinfo. */
This uses an SLIST_ENTRY and breaks the build without sys/queue.h. Commit this until bde and friends finish arguing over what to do instead. :)
1999-08-09 06:50:07 +00:00
#include <sys/queue.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Clists are character lists, which is a variable length linked list
* of cblocks, with a count of the number of characters in the list.
*/
struct clist {
int c_cc; /* Number of characters in the clist. */
Fix cblock starvation bugs by reserving enough cblocks for minimal operation of each clist. Limit the growth of each clist. Clists can only grow larger than the reserved minimum if there are free cblocks in a shared pool. The size of this pool is now fixed (this could be improved). The reserved and maximum sizes are more carefully allocated for slip and ppp, depending on the mtu. A maximum MTU of 16384 is now enforced for ppp.
1994-11-26 19:24:13 +00:00
int c_cbcount; /* Number of cblocks. */
int c_cbmax; /* Max # cblocks allowed for this clist. */
int c_cbreserved; /* # cblocks reserved for this clist. */
BSD 4.4 Lite Kernel Sources
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char *c_cf; /* Pointer to the first cblock. */
char *c_cl; /* Pointer to the last cblock. */
};
/*
* Per-tty structure.
*
* Should be split in two, into device and tty drivers.
* Glue could be masks of what to echo and circular buffer
* (low, high, timeout).
*/
struct tty {
struct clist t_rawq; /* Device raw input queue. */
long t_rawcc; /* Raw input queue statistics. */
struct clist t_canq; /* Device canonical queue. */
long t_cancc; /* Canonical queue statistics. */
struct clist t_outq; /* Device output queue. */
long t_outcc; /* Output queue statistics. */
Changed type of t_line from u_char to int. The Lite2 merge blew away rev.1.6 which changed it from char to int.
1997-02-18 09:26:15 +00:00
int t_line; /* Interface to device drivers. */
BSD 4.4 Lite Kernel Sources
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dev_t t_dev; /* Device. */
int t_state; /* Device and driver (TS*) state. */
int t_flags; /* Tty flags. */
Fight against hanging modems: add timeout to ttywait. Reviewed by: Bruce
1995-01-05 00:01:07 +00:00
int t_timeout; /* Timeout for ttywait() */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct pgrp *t_pgrp; /* Foreground process group. */
struct session *t_session; /* Enclosing session. */
I got another batch of suggestions for cosmetic changes from bde.
1998-11-11 10:56:07 +00:00
struct sigio *t_sigio; /* Information for async I/O. */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct selinfo t_rsel; /* Tty read/oob select. */
struct selinfo t_wsel; /* Tty write select. */
struct termios t_termios; /* Termios state. */
struct winsize t_winsize; /* Window size. */
/* Start output. */
void (*t_oproc) __P((struct tty *));
/* Stop output. */
void (*t_stop) __P((struct tty *, int));
/* Set hardware state. */
int (*t_param) __P((struct tty *, struct termios *));
void *t_sc; /* XXX: net/if_sl.c:sl_softc. */
Obtained from: partly from ancient patches of mine via 1.1.5 Change all short variables in `struct tty' to int. Shorts were only right on ancient systems with ints optimized for vaxness over efficiency.
1995-07-31 22:50:08 +00:00
int t_column; /* Tty output column. */
int t_rocount, t_rocol; /* Tty. */
Set the input and output buffer sizes and the input buffer watermarks dynamically depending on the line speed(s). This should give the old sizes and watermarks until drivers are changed. Display the input watermarks in pstat and sicontrol.
1998-03-07 15:36:29 +00:00
int t_ififosize; /* Total size of upstream fifos. */
int t_ihiwat; /* High water mark for input. */
int t_ilowat; /* Low water mark for input. */
speed_t t_ispeedwat; /* t_ispeed override for watermarks. */
int t_ohiwat; /* High water mark for output. */
int t_olowat; /* Low water mark for output. */
speed_t t_ospeedwat; /* t_ospeed override for watermarks. */
Obtained from: partly from ancient patches of mine via 1.1.5 Change all short variables in `struct tty' to int. Shorts were only right on ancient systems with ints optimized for vaxness over efficiency.
1995-07-31 22:50:08 +00:00
int t_gen; /* Generation number. */
Add new sysctl "kern.ttys" which return all the struct tty's which have been registered with ttyregister(). register ptys with ttyregister().
1999-08-08 19:47:32 +00:00
SLIST_ENTRY(tty) t_list; /* Global chain of ttys for pstat(8) */
BSD 4.4 Lite Kernel Sources
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};
#define t_cc t_termios.c_cc
#define t_cflag t_termios.c_cflag
#define t_iflag t_termios.c_iflag
#define t_ispeed t_termios.c_ispeed
#define t_lflag t_termios.c_lflag
#define t_min t_termios.c_min
#define t_oflag t_termios.c_oflag
#define t_ospeed t_termios.c_ospeed
#define t_time t_termios.c_time
#define TTIPRI 25 /* Sleep priority for tty reads. */
#define TTOPRI 26 /* Sleep priority for tty writes. */
Define IBUFSIZ as 384. This goes with speeding up ttnread(). OBUFSIZ should be increased to the same value as IBUFSIZE (both are smaller than desirable because they have to fit on the stack), but there are currently problems with magic buffer limits and watermarks. Remove unused #define of TTMASK. Undo bogus exportation of ttnread().
1995-04-15 20:59:28 +00:00
/*
* User data unfortunately has to be copied through buffers on the way to
* and from clists. The buffers are on the stack so their sizes must be
* fairly small.
*/
#define IBUFSIZ 384 /* Should be >= max value of MIN. */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#define OBUFSIZ 100
Define IBUFSIZ as 384. This goes with speeding up ttnread(). OBUFSIZ should be increased to the same value as IBUFSIZE (both are smaller than desirable because they have to fit on the stack), but there are currently problems with magic buffer limits and watermarks. Remove unused #define of TTMASK. Undo bogus exportation of ttnread().
1995-04-15 20:59:28 +00:00
Protect TTYHOG by #ifndef so it can be overridden from the config file. Submitted by: hsu@clinet.fi (Heikki Suonsivu)
1995-07-16 10:22:37 +00:00
#ifndef TTYHOG
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#define TTYHOG 1024
Protect TTYHOG by #ifndef so it can be overridden from the config file. Submitted by: hsu@clinet.fi (Heikki Suonsivu)
1995-07-16 10:22:37 +00:00
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#ifdef KERNEL
#define TTMAXHIWAT roundup(2048, CBSIZE)
#define TTMINHIWAT roundup(100, CBSIZE)
#define TTMAXLOWAT 256
#define TTMINLOWAT 32
#endif
/* These flags are kept in t_state. */
Split TS_ASLEEP (sleep on output [below low water])into TS_SO_OLOWAT (sleep on output below low water) and TS_SO_OCOMPLETE (sleep on output complete). Most of the support for this has already been committed. Drivers should call ttwwakeup() to handle wakeups whenever output is below low water (and some output event causes this condition to be checked) or TS_BUSY is cleared. tty.c: Fix the livelock in ttywait() properly by sleeping on output complete, not on output below low water. Use ttwwakeup() instead of separate select and output wakeups for all wakeups of writers. Add wakeups of writers for output flushes and carrier/clocal transitions. Don't go to sleep in ttycheckoutq() if ttstart() reduces the queue to below low water. Use the timeout built into tsleep() in ttycheckoutq(). Optimize the select wakeup in ttwwakeup(). It seems reasonable to know too much about the internals of tp->t_wsel now that the knowledge is localised in tty.c.
1995-07-30 12:39:42 +00:00
#define TS_SO_OLOWAT 0x00001 /* Wake up when output <= low water. */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#define TS_ASYNC 0x00002 /* Tty in async I/O mode. */
#define TS_BUSY 0x00004 /* Draining output. */
#define TS_CARR_ON 0x00008 /* Carrier is present. */
#define TS_FLUSH 0x00010 /* Outq has been flushed during DMA. */
#define TS_ISOPEN 0x00020 /* Open has completed. */
#define TS_TBLOCK 0x00040 /* Further input blocked. */
#define TS_TIMEOUT 0x00080 /* Wait for output char processing. */
#define TS_TTSTOP 0x00100 /* Output paused. */
Assorted cosmetic changes: Make more functions static. tty.c: Use tcflag_t (u_long) and cc_t instead of u_char and int/long. Don't record values that are only evaluated once. Compare ints using imin(), not min(). min() is for comparing u_ints. Old versions of tty.c used the type-safe but multiple-evaluation-unsafe macro MIN(). The args are apparently never negative; otherwise this change would be non-cosmetic. Don't repeat the loop test in ttywait(). tty.h: Improve English in and formatting of comments.
1995-07-31 19:17:19 +00:00
#ifdef notyet
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#define TS_WOPEN 0x00200 /* Open in progress. */
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 17:47:08 +00:00
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#define TS_XCLUDE 0x00400 /* Tty requires exclusivity. */
/* State for intra-line fancy editing work. */
#define TS_BKSL 0x00800 /* State for lowercase \ work. */
#define TS_CNTTB 0x01000 /* Counting tab width, ignore FLUSHO. */
#define TS_ERASE 0x02000 /* Within a \.../ for PRTRUB. */
#define TS_LNCH 0x04000 /* Next character is literal. */
#define TS_TYPEN 0x08000 /* Retyping suspended input (PENDIN). */
#define TS_LOCAL (TS_BKSL | TS_CNTTB | TS_ERASE | TS_LNCH | TS_TYPEN)
TS_SNOOP flag added to identify tty is begin snoopped snoop.h have all structures related to the snp device and stuff
1995-02-14 21:23:48 +00:00
Split TS_ASLEEP (sleep on output [below low water])into TS_SO_OLOWAT (sleep on output below low water) and TS_SO_OCOMPLETE (sleep on output complete). Most of the support for this has already been committed. Drivers should call ttwwakeup() to handle wakeups whenever output is below low water (and some output event causes this condition to be checked) or TS_BUSY is cleared. tty.c: Fix the livelock in ttywait() properly by sleeping on output complete, not on output below low water. Use ttwwakeup() instead of separate select and output wakeups for all wakeups of writers. Add wakeups of writers for output flushes and carrier/clocal transitions. Don't go to sleep in ttycheckoutq() if ttstart() reduces the queue to below low water. Use the timeout built into tsleep() in ttycheckoutq(). Optimize the select wakeup in ttwwakeup(). It seems reasonable to know too much about the internals of tp->t_wsel now that the knowledge is localised in tty.c.
1995-07-30 12:39:42 +00:00
/* Extras. */
Assorted cosmetic changes: Make more functions static. tty.c: Use tcflag_t (u_long) and cc_t instead of u_char and int/long. Don't record values that are only evaluated once. Compare ints using imin(), not min(). min() is for comparing u_ints. Old versions of tty.c used the type-safe but multiple-evaluation-unsafe macro MIN(). The args are apparently never negative; otherwise this change would be non-cosmetic. Don't repeat the loop test in ttywait(). tty.h: Improve English in and formatting of comments.
1995-07-31 19:17:19 +00:00
#define TS_CAN_BYPASS_L_RINT 0x010000 /* Device in "raw" mode. */
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
#define TS_CONNECTED 0x020000 /* Connection open. */
Assorted cosmetic changes: Make more functions static. tty.c: Use tcflag_t (u_long) and cc_t instead of u_char and int/long. Don't record values that are only evaluated once. Compare ints using imin(), not min(). min() is for comparing u_ints. Old versions of tty.c used the type-safe but multiple-evaluation-unsafe macro MIN(). The args are apparently never negative; otherwise this change would be non-cosmetic. Don't repeat the loop test in ttywait(). tty.h: Improve English in and formatting of comments.
1995-07-31 19:17:19 +00:00
#define TS_SNOOP 0x040000 /* Device is being snooped on. */
Split TS_ASLEEP (sleep on output [below low water])into TS_SO_OLOWAT (sleep on output below low water) and TS_SO_OCOMPLETE (sleep on output complete). Most of the support for this has already been committed. Drivers should call ttwwakeup() to handle wakeups whenever output is below low water (and some output event causes this condition to be checked) or TS_BUSY is cleared. tty.c: Fix the livelock in ttywait() properly by sleeping on output complete, not on output below low water. Use ttwwakeup() instead of separate select and output wakeups for all wakeups of writers. Add wakeups of writers for output flushes and carrier/clocal transitions. Don't go to sleep in ttycheckoutq() if ttstart() reduces the queue to below low water. Use the timeout built into tsleep() in ttycheckoutq(). Optimize the select wakeup in ttwwakeup(). It seems reasonable to know too much about the internals of tp->t_wsel now that the knowledge is localised in tty.c.
1995-07-30 12:39:42 +00:00
#define TS_SO_OCOMPLETE 0x080000 /* Wake up when output completes. */
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
#define TS_ZOMBIE 0x100000 /* Connection lost. */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Obtained from: partly from ancient patches of mine via 1.1.5 Handle MDMBUF a little better. Prepare to handle 4 different kinds of output flow control.
1995-07-31 22:48:46 +00:00
/* Hardware flow-control-invoked bits. */
#define TS_CAR_OFLOW 0x200000 /* For MDMBUF (XXX handle in driver). */
#ifdef notyet
#define TS_CTS_OFLOW 0x400000 /* For CCTS_OFLOW. */
#define TS_DSR_OFLOW 0x800000 /* For CDSR_OFLOW. */
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* Character type information. */
#define ORDINARY 0
#define CONTROL 1
#define BACKSPACE 2
#define NEWLINE 3
#define TAB 4
#define VTAB 5
#define RETURN 6
struct speedtab {
int sp_speed; /* Speed. */
int sp_code; /* Code. */
};
/* Modem control commands (driver). */
#define DMSET 0
#define DMBIS 1
#define DMBIC 2
#define DMGET 3
/* Flags on a character passed to ttyinput. */
#define TTY_CHARMASK 0x000000ff /* Character mask */
#define TTY_QUOTE 0x00000100 /* Character quoted */
#define TTY_ERRORMASK 0xff000000 /* Error mask */
Add TTY_OE for overrun error and TTY_BI for break condition
1995-03-29 19:03:02 +00:00
#define TTY_FE 0x01000000 /* Framing error */
BSD 4.4 Lite Kernel Sources
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#define TTY_PE 0x02000000 /* Parity error */
Add TTY_OE for overrun error and TTY_BI for break condition
1995-03-29 19:03:02 +00:00
#define TTY_OE 0x04000000 /* Overrun error */
#define TTY_BI 0x08000000 /* Break condition */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* Is tp controlling terminal for p? */
#define isctty(p, tp) \
((p)->p_session == (tp)->t_session && (p)->p_flag & P_CONTROLT)
/* Is p in background of tp? */
#define isbackground(p, tp) \
(isctty((p), (tp)) && (p)->p_pgrp != (tp)->t_pgrp)
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
/* Unique sleep addresses. */
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
#define TSA_CARR_ON(tp) ((void *)&(tp)->t_rawq)
#define TSA_HUP_OR_INPUT(tp) ((void *)&(tp)->t_rawq.c_cf)
Split TS_ASLEEP (sleep on output [below low water])into TS_SO_OLOWAT (sleep on output below low water) and TS_SO_OCOMPLETE (sleep on output complete). Most of the support for this has already been committed. Drivers should call ttwwakeup() to handle wakeups whenever output is below low water (and some output event causes this condition to be checked) or TS_BUSY is cleared. tty.c: Fix the livelock in ttywait() properly by sleeping on output complete, not on output below low water. Use ttwwakeup() instead of separate select and output wakeups for all wakeups of writers. Add wakeups of writers for output flushes and carrier/clocal transitions. Don't go to sleep in ttycheckoutq() if ttstart() reduces the queue to below low water. Use the timeout built into tsleep() in ttycheckoutq(). Optimize the select wakeup in ttwwakeup(). It seems reasonable to know too much about the internals of tp->t_wsel now that the knowledge is localised in tty.c.
1995-07-30 12:39:42 +00:00
#define TSA_OCOMPLETE(tp) ((void *)&(tp)->t_outq.c_cl)
#define TSA_OLOWAT(tp) ((void *)&(tp)->t_outq)
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
#define TSA_PTC_READ(tp) ((void *)&(tp)->t_outq.c_cf)
#define TSA_PTC_WRITE(tp) ((void *)&(tp)->t_rawq.c_cl)
#define TSA_PTS_READ(tp) ((void *)&(tp)->t_canq)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#ifdef KERNEL
Last major round (Unless Bruce thinks of somthing :-) of malloc changes. Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
1997-10-12 20:26:33 +00:00
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_TTYS);
#endif
Add and move declarations to fix all of the warnings from `gcc -Wimplicit' (except in netccitt, netiso and netns) and most of the warnings from `gcc -Wnested-externs'. Fix all the bugs found. There were no serious ones.
1995-03-16 18:17:34 +00:00
extern struct tty *constty; /* Temporary virtual console. */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int b_to_q __P((char *cp, int cc, struct clist *q));
void catq __P((struct clist *from, struct clist *to));
Fix cblock starvation bugs by reserving enough cblocks for minimal operation of each clist. Limit the growth of each clist. Clists can only grow larger than the reserved minimum if there are free cblocks in a shared pool. The size of this pool is now fixed (this could be improved). The reserved and maximum sizes are more carefully allocated for slip and ppp, depending on the mtu. A maximum MTU of 16384 is now enforced for ppp.
1994-11-26 19:24:13 +00:00
void clist_alloc_cblocks __P((struct clist *q, int ccmax, int ccres));
void clist_free_cblocks __P((struct clist *q));
Fix up some sloppy coding practices: - Delete redundant declarations. - Add -Wredundant-declarations to Makefile.i386 so they don't come back. - Delete sloppy COMMON-style declarations of uninitialized data in header files. - Add a few prototypes. - Clean up warnings resulting from the above. NB: ioconf.c will still generate a redundant-declaration warning, which is unavoidable unless somebody volunteers to make `config' smarter.
1994-08-18 22:36:09 +00:00
/* void clist_init __P((void)); */ /* defined in systm.h for main() */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int getc __P((struct clist *q));
void ndflush __P((struct clist *q, int cc));
int ndqb __P((struct clist *q, int flag));
char *nextc __P((struct clist *q, char *cp, int *c));
int putc __P((int c, struct clist *q));
int q_to_b __P((struct clist *q, char *cp, int cc));
int unputc __P((struct clist *q));
This commit fixes various 64bit portability problems required for FreeBSD/alpha. The most significant item is to change the command argument to ioctl functions from int to u_long. This change brings us inline with various other BSD versions. Driver writers may like to use (__FreeBSD_version == 300003) to detect this change. The prototype FreeBSD/alpha machdep will follow in a couple of days time.
1998-06-07 17:13:14 +00:00
int ttcompat __P((struct tty *tp, u_long com, caddr_t data, int flag));
int ttsetcompat __P((struct tty *tp, u_long *com, caddr_t data, struct termios *term));
Add and move declarations to fix all of the warnings from `gcc -Wimplicit' (except in netccitt, netiso and netns) and most of the warnings from `gcc -Wnested-externs'. Fix all the bugs found. There were no serious ones.
1995-03-16 18:17:34 +00:00
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
void termioschars __P((struct termios *t));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int tputchar __P((int c, struct tty *tp));
This commit fixes various 64bit portability problems required for FreeBSD/alpha. The most significant item is to change the command argument to ioctl functions from int to u_long. This change brings us inline with various other BSD versions. Driver writers may like to use (__FreeBSD_version == 300003) to detect this change. The prototype FreeBSD/alpha machdep will follow in a couple of days time.
1998-06-07 17:13:14 +00:00
int ttioctl __P((struct tty *tp, u_long com, void *data, int flag));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ttread __P((struct tty *tp, struct uio *uio, int flag));
Restored unused function ttrstrt(). It would be used if the low level drivers supported inter-character delays.
1995-12-14 22:32:52 +00:00
void ttrstrt __P((void *tp));
Update interfaces for poll()
1997-09-14 02:25:41 +00:00
int ttypoll __P((struct tty *tp, int events, struct proc *p));
int ttpoll __P((dev_t dev, int events, struct proc *p));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
void ttsetwater __P((struct tty *tp));
int ttspeedtab __P((int speed, struct speedtab *table));
int ttstart __P((struct tty *tp));
void ttwakeup __P((struct tty *tp));
int ttwrite __P((struct tty *tp, struct uio *uio, int flag));
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
void ttwwakeup __P((struct tty *tp));
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
void ttyblock __P((struct tty *tp));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
void ttychars __P((struct tty *tp));
int ttycheckoutq __P((struct tty *tp, int wait));
int ttyclose __P((struct tty *tp));
void ttyflush __P((struct tty *tp, int rw));
void ttyinfo __P((struct tty *tp));
int ttyinput __P((int c, struct tty *tp));
int ttylclose __P((struct tty *tp, int flag));
int ttymodem __P((struct tty *tp, int flag));
int ttyopen __P((dev_t device, struct tty *tp));
Add new sysctl "kern.ttys" which return all the struct tty's which have been registered with ttyregister(). register ptys with ttyregister().
1999-08-08 19:47:32 +00:00
void ttyregister __P((struct tty *tp));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int ttysleep __P((struct tty *tp,
void *chan, int pri, char *wmesg, int timeout));
int ttywait __P((struct tty *tp));
Enable ttymalloc().
1999-08-08 20:24:58 +00:00
struct tty *ttymalloc __P((struct tty *tp));
Export ttnread(). Submitted by: Heikki Suonsivu <hsu@cs.hut.fi>
1995-02-09 11:14:19 +00:00
void ttyfree __P((struct tty *));
Add and move declarations to fix all of the warnings from `gcc -Wimplicit' (except in netccitt, netiso and netns) that I didn't notice when I fixed "all" such warnings before.
1995-03-28 07:58:53 +00:00
Fix cblock starvation bugs by reserving enough cblocks for minimal operation of each clist. Limit the growth of each clist. Clists can only grow larger than the reserved minimum if there are free cblocks in a shared pool. The size of this pool is now fixed (this could be improved). The reserved and maximum sizes are more carefully allocated for slip and ppp, depending on the mtu. A maximum MTU of 16384 is now enforced for ppp.
1994-11-26 19:24:13 +00:00
#endif /* KERNEL */
Made them all idempotent. Reviewed by: Submitted by:
1994-08-21 04:42:17 +00:00
Fix cblock starvation bugs by reserving enough cblocks for minimal operation of each clist. Limit the growth of each clist. Clists can only grow larger than the reserved minimum if there are free cblocks in a shared pool. The size of this pool is now fixed (this could be improved). The reserved and maximum sizes are more carefully allocated for slip and ppp, depending on the mtu. A maximum MTU of 16384 is now enforced for ppp.
1994-11-26 19:24:13 +00:00
#endif /* !_SYS_TTY_H_ */
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