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felix: Add a sysctl to control timer routine frequency

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Driver polls status of all PHYs connected to the switch in a
fixed interval.
Add a sysctl that allows to control frequency of that.
The value is expressed in ticks and defaults to "hz", or 1 second.

Obtained from: Semihalf
Sponsored by: Alstom Group
This commit is contained in:
Kornel Duleba 2021-10-25 15:18:27 +02:00 committed by Wojciech Macek
parent 8c5fead105
commit d88aecce69
2 changed files with 39 additions and 1 deletions
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38
sys/dev/etherswitch/felix/felix.c
View file

@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/rman.h>
#include <machine/bus.h>
@ -325,6 +326,33 @@ felix_setup(felix_softc_t sc)
return (0);
}
static int
felix_timer_rate(SYSCTL_HANDLER_ARGS)
{
felix_softc_t sc;
int error, value, old;
sc = arg1;
old = value = sc->timer_ticks;
error = sysctl_handle_int(oidp, &value, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (value < 0)
return (EINVAL);
if (value == old)
return (0);
FELIX_LOCK(sc);
sc->timer_ticks = value;
callout_reset(&sc->tick_callout, sc->timer_ticks, felix_tick, sc);
FELIX_UNLOCK(sc);
return (0);
}
static int
felix_attach(device_t dev)
{
@ -426,6 +454,13 @@ felix_attach(device_t dev)
if (error != 0)
goto out_fail;
sc->timer_ticks = hz; /* Default to 1s. */
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "timer_ticks", CTLTYPE_INT | CTLFLAG_RW,
sc, 0, felix_timer_rate, "I",
"Number of ticks between timer invocations");
/* The tick routine has to be called with the lock held. */
FELIX_LOCK(sc);
felix_tick(sc);
@ -922,7 +957,8 @@ felix_tick(void *arg)
MPASS(mii != NULL);
mii_tick(mii);
}
callout_reset(&sc->tick_callout, hz, felix_tick, sc);
if (sc->timer_ticks != 0)
callout_reset(&sc->tick_callout, sc->timer_ticks, felix_tick, sc);
}
static int

2
sys/dev/etherswitch/felix/felix_var.h
View file

@ -102,6 +102,8 @@ typedef struct felix_softc {
int vlan_mode;
int vlans[FELIX_NUM_VLANS];
uint32_t timer_ticks;
} *felix_softc_t;
#endif