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ipmi: Fixes for ipmi_opal(powernv)

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* Crank the OPAL state machine during the receive loop, to make sure the
  pollers are executed
* Add a proper detach function, so the module can be unloaded and reloaded
  at runtime.

It still doesn't reliably work 100% of the time on POWER9, and it appears
timing and/or cache related.  It may work on POWER8 now.

MFC after:	2 weeks
This commit is contained in:
Justin Hibbits 2019-04-02 04:12:06 +00:00
parent fbf7737949
commit 95a1f0e81c
1 changed files with 12 additions and 1 deletions
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13
sys/dev/ipmi/ipmi_opal.c
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@ -99,6 +99,8 @@ opal_ipmi_polled_request(struct opal_ipmi_softc *sc, struct ipmi_request *req,
timo *= 10; /* Timeout is in milliseconds, we delay in 100us */
do {
msg_len = sizeof(struct opal_ipmi_msg) + IPMI_MAX_RX;
/* Crank the OPAL state machine while we poll for a reply. */
opal_call(OPAL_POLL_EVENTS, NULL);
err = opal_call(OPAL_IPMI_RECV, sc->sc_interface,
vtophys(sc->sc_msg), vtophys(&msg_len));
if (err != OPAL_EMPTY)
@ -113,6 +115,7 @@ opal_ipmi_polled_request(struct opal_ipmi_softc *sc, struct ipmi_request *req,
req->ir_replylen = min(req->ir_replylen, req->ir_replybuflen);
memcpy(req->ir_reply, &sc->sc_msg->data[1], req->ir_replylen);
req->ir_compcode = sc->sc_msg->data[0];
err = 0;
break;
case OPAL_RESOURCE:
err = ENOMEM;
@ -223,7 +226,15 @@ opal_ipmi_attach(device_t dev)
static int
opal_ipmi_detach(device_t dev)
{
return (EBUSY);
struct opal_ipmi_softc *sc;
int err;
sc = device_get_softc(dev);
err = ipmi_detach(dev);
if (err == 0)
free(sc->sc_msg, M_IPMI);
return (err);
}
static device_method_t opal_ipmi_methods[] = {