Date: Fri, 13 Oct 2000 12:36:21 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: John Baldwin <jhb@FreeBSD.ORG> Cc: arch@FreeBSD.ORG, Jake Burkholder <jburkhol@home.com> Subject: Re: when is it safe to call msleep? Message-ID: <Pine.LNX.4.21.0010131230160.3882-100000@zeppo.feral.com> In-Reply-To: <XFMail.001013111611.jhb@FreeBSD.org>
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Hmm... yes... now I don't know why I thought that the switch to SMP would
magically make all kernel services available during probetime... Sorry- I
didn't do my homework. I'm not going to even try the suggestion you made- we
still have all of the other stuff which needs to happen as well.
What I was trying do to was to eliminate the need for polling in Qlogic
driver. I have the mutex stuff ready to go, and didn't want to have to do any
runtime switching. Instead, I'll now have to do (below)... too bad- most of
the obnoxious time delay in booting with fibre channel has to do with dealing
with mailbox commands that take a very long time to die and tell you that the
fabric controller is dead. Zut.
The assumption is, as it has been, that the intr_config_hook has to run to let
me know that it's safe to use interrupt style mechanisms.
--------
static INLINE void isp_mbox_wait_complete(struct ispsoftc *);
static INLINE void
isp_mbox_wait_complete(struct ispsoftc *isp)
{
if (isp_can_lock) {
isp->isp_osinfo.mboxwaiting = 1;
#if ISP_PLATFORM_VERSION_MAJOR > 5 || \
(ISP_PLATFORM_VERSION_MAJOR == 5 && ISP_PLATFORM_VERSION_MINOR >= 4)
(void) msleep(&isp->isp_osinfo.mboxwaiting,
&isp->isp_osinfo.lock, PRIBIO, "isp_mboxwaiting", 5 * hz);
#else
(void) tsleep(&isp->isp_osinfo.mboxwaiting, PRIBIO,
"isp_mboxwaiting", 5 * hz);
#endif
if (isp->isp_mboxbsy != 0) {
isp_prt(isp, ISP_LOGWARN, "mailbox timeout");
isp->isp_mboxbsy = 0;
}
isp->isp_osinfo.mboxwaiting = 0;
} else {
int j;
for (j = 0; j < 60 * 2000; j++) {
if (isp_intr(isp) == 0) {
USEC_DELAY(500);
}
if (isp->isp_mboxbsy == 0) {
break;
}
}
if (isp->isp_mboxbsy != 0) {
isp_prt(isp, ISP_LOGWARN, "mailbox timeout");
}
}
}
---------
-matt
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