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cxgbe(4): Add a sysctl to report the chip's microprocessor's load

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averages.  This works with debug or custom firmwares only.

sysctl dev.<nexus>.<instance>.loadavg
sysctl dev.t6nex.0.loadavg

MFC after:	1 month
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2018-07-10 03:03:10 +00:00
parent c7a82b9c6c
commit 82df14c3ab
1 changed files with 44 additions and 0 deletions
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44
sys/dev/cxgbe/t4_main.c
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@ -559,6 +559,7 @@ static int sysctl_fec(SYSCTL_HANDLER_ARGS);
static int sysctl_autoneg(SYSCTL_HANDLER_ARGS);
static int sysctl_handle_t4_reg64(SYSCTL_HANDLER_ARGS);
static int sysctl_temperature(SYSCTL_HANDLER_ARGS);
static int sysctl_loadavg(SYSCTL_HANDLER_ARGS);
static int sysctl_cctrl(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_ibq_obq(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_la(SYSCTL_HANDLER_ARGS);
@ -5542,6 +5543,10 @@ t4_sysctls(struct adapter *sc)
CTLFLAG_RD, sc, 0, sysctl_temperature, "I",
"chip temperature (in Celsius)");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "loadavg", CTLTYPE_STRING |
CTLFLAG_RD, sc, 0, sysctl_loadavg, "A",
"microprocessor load averages (debug firmwares only)");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "core_vdd", CTLFLAG_RD,
&sc->params.core_vdd, 0, "core Vdd (in mV)");
@ -6609,6 +6614,45 @@ sysctl_temperature(SYSCTL_HANDLER_ARGS)
return (rc);
}
static int
sysctl_loadavg(SYSCTL_HANDLER_ARGS)
{
struct adapter *sc = arg1;
struct sbuf *sb;
int rc;
uint32_t param, val;
rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4lavg");
if (rc)
return (rc);
param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_LOAD);
rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
end_synchronized_op(sc, 0);
if (rc)
return (rc);
rc = sysctl_wire_old_buffer(req, 0);
if (rc != 0)
return (rc);
sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
if (sb == NULL)
return (ENOMEM);
if (val == 0xffffffff) {
/* Only debug and custom firmwares report load averages. */
sbuf_printf(sb, "not available");
} else {
sbuf_printf(sb, "%d %d %d", val & 0xff, (val >> 8) & 0xff,
(val >> 16) & 0xff);
}
rc = sbuf_finish(sb);
sbuf_delete(sb);
return (rc);
}
static int
sysctl_cctrl(SYSCTL_HANDLER_ARGS)
{