diff options
Diffstat (limited to 'sys/dev/sio')
| -rw-r--r-- | sys/dev/sio/sio.c | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c index 91b6aff..2728e25 100644 --- a/sys/dev/sio/sio.c +++ b/sys/dev/sio/sio.c @@ -71,6 +71,7 @@ #include <sys/rman.h> #include <sys/timetc.h> #include <sys/timepps.h> +#include <sys/uio.h> #include <isa/isavar.h> @@ -1676,6 +1677,39 @@ siointr(arg) #endif /* COM_MULTIPORT */ } +static struct timespec siots[8192]; +static int siotso; +static int volatile siotsunit = -1; + +static int +sysctl_siots(SYSCTL_HANDLER_ARGS) +{ + char buf[128]; + long long delta; + size_t len; + int error, i; + + for (i = 1; i < siotso; i++) { + delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) * + 1000000000 + + (siots[i].tv_nsec - siots[i - 1].tv_nsec); + len = sprintf(buf, "%lld\n", delta); + if (delta >= 110000) + len += sprintf(buf + len - 1, ": *** %ld.%09ld\n", + (long)siots[i].tv_sec, siots[i].tv_nsec); + if (i == siotso - 1) + buf[len - 1] = '\0'; + error = SYSCTL_OUT(req, buf, len); + if (error != 0) + return (error); + uio_yield(); + } + return (0); +} + +SYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD, + 0, 0, sysctl_siots, "A", "sio timestamps"); + static void siointr1(com) struct com_s *com; @@ -1845,7 +1879,7 @@ cont: if (line_status & LSR_TXRDY && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { ioptr = com->obufq.l_head; - if (com->tx_fifo_size > 1) { + if (com->tx_fifo_size > 1 && com->unit != siotsunit) { u_int ocount; ocount = com->obufq.l_tail - ioptr; @@ -1858,6 +1892,11 @@ cont: } else { outb(com->data_port, *ioptr++); ++com->bytes_out; + if (com->unit == siotsunit) { + nanouptime(&siots[siotso]); + siotso = (siotso + 1) % + (sizeof siots / sizeof siots[0]); + } } com->obufq.l_head = ioptr; if (COM_IIR_TXRDYBUG(com->flags)) { @@ -2206,7 +2245,8 @@ comparam(tp, t) * interrupt disablement times in other parts of the system, * without producing silo overflow errors. */ - com->fifo_image = t->c_ospeed <= 4800 + com->fifo_image = com->unit == siotsunit ? 0 + : t->c_ospeed <= 4800 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; #ifdef COM_ESP /* |
