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Extend the poll code so that it can periodically scan the host cards

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for work regardless of whether there was an interrupt.  This needs more
work, it should be able to run better when there are more than 3 host
cards present, ie: all cards in polling-only mode with no IRQ.  (The
host cards have a choice of 3 irq's, 11, 12, or 15, or just polling)
This commit is contained in:
Peter Wemm 1996-08-12 17:12:07 +00:00
parent c00062b834
commit 08424dfaa3
2 changed files with 22 additions and 8 deletions
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15
sys/dev/si/si.c
View file

@ -30,7 +30,7 @@
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE.
*
* $Id: si.c,v 1.49 1996/07/26 16:55:37 peter Exp $
* $Id: si.c,v 1.50 1996/08/03 00:21:44 peter Exp $
*/
#ifndef lint
@ -82,7 +82,9 @@ static const char si_copyright1[] = "@(#) (C) Specialix International, 1990,199
* and a (programmable - SIHOST2) interrupt at IRQ 11,12 or 15.
*/
#define POLL /* turn on poller to generate buffer empty interrupt */
#define POLL /* turn on poller to scan for lost interrupts */
#define REALPOLL /* on each poll, scan for work regardless */
#define POLLHZ (hz/10) /* 10 times per second */
#define SI_DEF_HWFLOW /* turn on default CRTSCTS flow control */
#define SI_I_HIGH_WATER (TTYHOG - 2 * SI_BUFFERSIZE)
#define INT_COUNT 25000 /* max of 125 ints per second */
@ -230,8 +232,10 @@ static int si_default_cflag = TTYDEF_CFLAG;
#ifdef POLL
static int si_pollrate; /* in addition to irq */
static int si_realpoll; /* poll HW on timer */
SYSCTL_INT(_machdep, OID_AUTO, si_pollrate, CTLFLAG_RW, &si_pollrate, 0, "");
SYSCTL_INT(_machdep, OID_AUTO, si_realpoll, CTLFLAG_RW, &si_realpoll, 0, "");
static int init_finished = 0;
static void si_poll __P((void *));
@ -288,7 +292,10 @@ siprobe(id)
si_registerdev(id);
si_pollrate = (hz / 10); /* 10 per second */
si_pollrate = POLLHZ; /* default 10 per second */
#ifdef REALPOLL
si_realpoll = 1; /* scan always */
#endif
maddr = id->id_maddr; /* virtual address... */
paddr = (caddr_t)vtophys(id->id_maddr); /* physical address... */
@ -1737,7 +1744,7 @@ si_poll(void *nothing)
}
}
}
if (lost)
if (lost || si_realpoll)
siintr(-1); /* call intr with fake vector */
out:
splx(oldspl);

15
sys/i386/isa/si.c
View file

@ -30,7 +30,7 @@
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE.
*
* $Id: si.c,v 1.49 1996/07/26 16:55:37 peter Exp $
* $Id: si.c,v 1.50 1996/08/03 00:21:44 peter Exp $
*/
#ifndef lint
@ -82,7 +82,9 @@ static const char si_copyright1[] = "@(#) (C) Specialix International, 1990,199
* and a (programmable - SIHOST2) interrupt at IRQ 11,12 or 15.
*/
#define POLL /* turn on poller to generate buffer empty interrupt */
#define POLL /* turn on poller to scan for lost interrupts */
#define REALPOLL /* on each poll, scan for work regardless */
#define POLLHZ (hz/10) /* 10 times per second */
#define SI_DEF_HWFLOW /* turn on default CRTSCTS flow control */
#define SI_I_HIGH_WATER (TTYHOG - 2 * SI_BUFFERSIZE)
#define INT_COUNT 25000 /* max of 125 ints per second */
@ -230,8 +232,10 @@ static int si_default_cflag = TTYDEF_CFLAG;
#ifdef POLL
static int si_pollrate; /* in addition to irq */
static int si_realpoll; /* poll HW on timer */
SYSCTL_INT(_machdep, OID_AUTO, si_pollrate, CTLFLAG_RW, &si_pollrate, 0, "");
SYSCTL_INT(_machdep, OID_AUTO, si_realpoll, CTLFLAG_RW, &si_realpoll, 0, "");
static int init_finished = 0;
static void si_poll __P((void *));
@ -288,7 +292,10 @@ siprobe(id)
si_registerdev(id);
si_pollrate = (hz / 10); /* 10 per second */
si_pollrate = POLLHZ; /* default 10 per second */
#ifdef REALPOLL
si_realpoll = 1; /* scan always */
#endif
maddr = id->id_maddr; /* virtual address... */
paddr = (caddr_t)vtophys(id->id_maddr); /* physical address... */
@ -1737,7 +1744,7 @@ si_poll(void *nothing)
}
}
}
if (lost)
if (lost || si_realpoll)
siintr(-1); /* call intr with fake vector */
out:
splx(oldspl);