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Always wake up writers after clearing TS_BUSY. This will soon be

Browse Source 
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().
This commit is contained in:
Bruce Evans 1995-07-29 04:05:57 +00:00
parent b366737bf0
commit 4ce7d32178
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=9754
8 changed files with 31 additions and 95 deletions
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29
sys/dev/cy/cy.c
View File

@ -27,7 +27,7 @@
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: cy.c,v 1.10 1995/07/22 01:29:58 bde Exp $
* $Id: cy.c,v 1.11 1995/07/22 16:44:46 bde Exp $
*/
#include "cy.h"
@ -184,7 +184,7 @@
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comstart() and siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
@ -1642,7 +1642,7 @@ siopoll()
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
comstart(tp);
}
} else {
do {
@ -2140,12 +2140,8 @@ siostop(tp, rw)
int rw;
{
struct com_s *com;
cy_addr iobase;
int unit;
unit = DEV_TO_UNIT(tp->t_dev);
com = com_addr(unit);
iobase = com->iobase;
com = com_addr(DEV_TO_UNIT(tp->t_dev));
disable_intr();
if (rw & FWRITE) {
com->obufs[0].l_queued = FALSE;
@ -2159,23 +2155,8 @@ siostop(tp, rw)
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
if (tp->t_state & TS_TTSTOP) {
com->state &= ~CS_TTGO;
if (com->intr_enable & CD1400_SRER_TXRDY) {
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd_outb(iobase, CD1400_SRER,
com->intr_enable &= ~CD1400_SRER_TXRDY);
}
} else {
com->state |= CS_TTGO;
if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)
&& !(com->intr_enable & CD1400_SRER_TXRDY)) {
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd_outb(iobase, CD1400_SRER,
com->intr_enable |= CD1400_SRER_TXRDY);
}
}
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}

29
sys/dev/cy/cy_isa.c
View File

@ -27,7 +27,7 @@
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: cy.c,v 1.10 1995/07/22 01:29:58 bde Exp $
* $Id: cy.c,v 1.11 1995/07/22 16:44:46 bde Exp $
*/
#include "cy.h"
@ -184,7 +184,7 @@
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comstart() and siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
@ -1642,7 +1642,7 @@ siopoll()
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
comstart(tp);
}
} else {
do {
@ -2140,12 +2140,8 @@ siostop(tp, rw)
int rw;
{
struct com_s *com;
cy_addr iobase;
int unit;
unit = DEV_TO_UNIT(tp->t_dev);
com = com_addr(unit);
iobase = com->iobase;
com = com_addr(DEV_TO_UNIT(tp->t_dev));
disable_intr();
if (rw & FWRITE) {
com->obufs[0].l_queued = FALSE;
@ -2159,23 +2155,8 @@ siostop(tp, rw)
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
if (tp->t_state & TS_TTSTOP) {
com->state &= ~CS_TTGO;
if (com->intr_enable & CD1400_SRER_TXRDY) {
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd_outb(iobase, CD1400_SRER,
com->intr_enable &= ~CD1400_SRER_TXRDY);
}
} else {
com->state |= CS_TTGO;
if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)
&& !(com->intr_enable & CD1400_SRER_TXRDY)) {
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd_outb(iobase, CD1400_SRER,
com->intr_enable |= CD1400_SRER_TXRDY);
}
}
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}

3
sys/dev/rc/rc.c
View File

@ -693,7 +693,7 @@ void rcpoll()
|| (tp->t_cc[VSTART] == tp->t_cc[VSTOP]))) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
rc_start(tp);
}
} else {
for (; tptr < eptr; tptr++)
@ -1468,6 +1468,7 @@ rc_discard_output(rc)
rc->rc_optr = rc->rc_obufend;
rc->rc_tp->t_state &= ~TS_BUSY;
enable_intr();
ttwwakeup(rc->rc_tp);
}
static void

11
sys/dev/sio/sio.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.104 1995/07/22 01:30:02 bde Exp $
* $Id: sio.c,v 1.105 1995/07/22 16:44:50 bde Exp $
*/
#include "sio.h"
@ -114,7 +114,7 @@
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comstart() and siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
@ -1591,7 +1591,7 @@ siopoll()
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
comstart(tp);
}
} else {
do {
@ -1886,11 +1886,8 @@ siostop(tp, rw)
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
if (tp->t_state & TS_TTSTOP)
com->state &= ~CS_TTGO;
else
com->state |= CS_TTGO;
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}

29
sys/i386/isa/cy.c
View File

@ -27,7 +27,7 @@
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: cy.c,v 1.10 1995/07/22 01:29:58 bde Exp $
* $Id: cy.c,v 1.11 1995/07/22 16:44:46 bde Exp $
*/
#include "cy.h"
@ -184,7 +184,7 @@
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comstart() and siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
@ -1642,7 +1642,7 @@ siopoll()
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
comstart(tp);
}
} else {
do {
@ -2140,12 +2140,8 @@ siostop(tp, rw)
int rw;
{
struct com_s *com;
cy_addr iobase;
int unit;
unit = DEV_TO_UNIT(tp->t_dev);
com = com_addr(unit);
iobase = com->iobase;
com = com_addr(DEV_TO_UNIT(tp->t_dev));
disable_intr();
if (rw & FWRITE) {
com->obufs[0].l_queued = FALSE;
@ -2159,23 +2155,8 @@ siostop(tp, rw)
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
if (tp->t_state & TS_TTSTOP) {
com->state &= ~CS_TTGO;
if (com->intr_enable & CD1400_SRER_TXRDY) {
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd_outb(iobase, CD1400_SRER,
com->intr_enable &= ~CD1400_SRER_TXRDY);
}
} else {
com->state |= CS_TTGO;
if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)
&& !(com->intr_enable & CD1400_SRER_TXRDY)) {
cd_outb(iobase, CD1400_CAR, unit & CD1400_CAR_CHAN);
cd_outb(iobase, CD1400_SRER,
com->intr_enable |= CD1400_SRER_TXRDY);
}
}
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}

3
sys/i386/isa/rc.c
View File

@ -693,7 +693,7 @@ void rcpoll()
|| (tp->t_cc[VSTART] == tp->t_cc[VSTOP]))) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
rc_start(tp);
}
} else {
for (; tptr < eptr; tptr++)
@ -1468,6 +1468,7 @@ rc_discard_output(rc)
rc->rc_optr = rc->rc_obufend;
rc->rc_tp->t_state &= ~TS_BUSY;
enable_intr();
ttwwakeup(rc->rc_tp);
}
static void

11
sys/i386/isa/sio.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.104 1995/07/22 01:30:02 bde Exp $
* $Id: sio.c,v 1.105 1995/07/22 16:44:50 bde Exp $
*/
#include "sio.h"
@ -114,7 +114,7 @@
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comstart() and siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
@ -1591,7 +1591,7 @@ siopoll()
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
comstart(tp);
}
} else {
do {
@ -1886,11 +1886,8 @@ siostop(tp, rw)
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
if (tp->t_state & TS_TTSTOP)
com->state &= ~CS_TTGO;
else
com->state |= CS_TTGO;
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}

11
sys/isa/sio.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* $Id: sio.c,v 1.104 1995/07/22 01:30:02 bde Exp $
* $Id: sio.c,v 1.105 1995/07/22 16:44:50 bde Exp $
*/
#include "sio.h"
@ -114,7 +114,7 @@
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comstart() and siostop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
@ -1591,7 +1591,7 @@ siopoll()
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ttstart(tp);
comstart(tp);
}
} else {
do {
@ -1886,11 +1886,8 @@ siostop(tp, rw)
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
if (tp->t_state & TS_TTSTOP)
com->state &= ~CS_TTGO;
else
com->state |= CS_TTGO;
enable_intr();
comstart(tp);
/* XXX should clear h/w fifos too. */
}