d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Watchdog drivers need to support rearming the watchdog in contexts which

Browse Source 
are not permitted to sleep.  Only use the IPMI watchdog with backends
which poll driver-initiated requests to meet this requirement.

In practice this means that watchdogs will no longer be used on systems
that use the SSIF backend.

Differential Revision:	https://reviews.freebsd.org/D2062
MFC after:	2 weeks
This commit is contained in:
John Baldwin 2015-04-24 16:56:23 +00:00
parent 02c26f81a7
commit 9662eef57a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=281941
4 changed files with 17 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
sys/dev/ipmi/ipmi.c
View File

@ -756,17 +756,22 @@ ipmi_startup(void *arg)
}
device_printf(dev, "Number of channels %d\n", i);
/* probe for watchdog */
IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
IPMI_GET_WDOG, 0, 0);
/*
* Probe for watchdog, but only for backends which support
* polled driver requests.
*/
if (sc->ipmi_driver_requests_polled) {
IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
IPMI_GET_WDOG, 0, 0);
ipmi_submit_driver_request(sc, req, 0);
ipmi_submit_driver_request(sc, req, 0);
if (req->ir_compcode == 0x00) {
device_printf(dev, "Attached watchdog\n");
/* register the watchdog event handler */
sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER(watchdog_list,
ipmi_wd_event, sc, 0);
if (req->ir_compcode == 0x00) {
device_printf(dev, "Attached watchdog\n");
/* register the watchdog event handler */
sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER(
watchdog_list, ipmi_wd_event, sc, 0);
}
}
sc->ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev),

1
sys/dev/ipmi/ipmi_kcs.c
View File

@ -520,6 +520,7 @@ ipmi_kcs_attach(struct ipmi_softc *sc)
sc->ipmi_startup = kcs_startup;
sc->ipmi_enqueue_request = ipmi_polled_enqueue_request;
sc->ipmi_driver_request = kcs_driver_request;
sc->ipmi_driver_requests_polled = 1;
/* See if we can talk to the controller. */
status = INB(sc, KCS_CTL_STS);

1
sys/dev/ipmi/ipmi_smic.c
View File

@ -415,6 +415,7 @@ ipmi_smic_attach(struct ipmi_softc *sc)
sc->ipmi_startup = smic_startup;
sc->ipmi_enqueue_request = ipmi_polled_enqueue_request;
sc->ipmi_driver_request = smic_driver_request;
sc->ipmi_driver_requests_polled = 1;
/* See if we can talk to the controller. */
flags = INB(sc, SMIC_FLAGS);

1
sys/dev/ipmi/ipmivars.h
View File

@ -105,6 +105,7 @@ struct ipmi_softc {
int ipmi_opened;
struct cdev *ipmi_cdev;
TAILQ_HEAD(,ipmi_request) ipmi_pending_requests;
int ipmi_driver_requests_polled;
eventhandler_tag ipmi_watchdog_tag;
int ipmi_watchdog_active;
struct intr_config_hook ipmi_ich;