svn commit: r354522 - head/sys/dev/cxgbe

[Navdeep Parhar]

Author: np
Date: Fri Nov  8 01:13:12 2019
New Revision: 354522
URL: https://svnweb.freebsd.org/changeset/base/354522

Log:
  cxgbe(4): Query Vdd from the firmware if its last known value is 0.
  
  TVSENSE may not be ready by the time t4_fw_initialize returns and the
  firmware returns 0 if the driver asks for the Vdd before the sensor is
  ready.
  
  MFC after:    1 week
  Sponsored by: Chelsio Communications

Modified:
  head/sys/dev/cxgbe/t4_main.c

Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c        Fri Nov  8 00:01:37 2019        
(r354521)
+++ head/sys/dev/cxgbe/t4_main.c        Fri Nov  8 01:13:12 2019        
(r354522)
@@ -656,6 +656,7 @@ 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_vdd(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);
@@ -6153,8 +6154,8 @@ t4_sysctls(struct adapter *sc)
            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)");
+       SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "core_vdd", CTLTYPE_INT |
+           CTLFLAG_RD, sc, 0, sysctl_vdd, "I", "core Vdd (in mV)");
 
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "local_cpus",
            CTLTYPE_STRING | CTLFLAG_RD, sc, LOCAL_CPUS,
@@ -7292,6 +7293,31 @@ sysctl_temperature(SYSCTL_HANDLER_ARGS)
 
        rc = sysctl_handle_int(oidp, &t, 0, req);
        return (rc);
+}
+
+static int
+sysctl_vdd(SYSCTL_HANDLER_ARGS)
+{
+       struct adapter *sc = arg1;
+       int rc;
+       uint32_t param, val;
+
+       if (sc->params.core_vdd == 0) {
+               rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK,
+                   "t4vdd");
+               if (rc)
+                       return (rc);
+               param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
+                   V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DIAG) |
+                   V_FW_PARAMS_PARAM_Y(FW_PARAM_DEV_DIAG_VDD);
+               rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
+               end_synchronized_op(sc, 0);
+               if (rc)
+                       return (rc);
+               sc->params.core_vdd = val;
+       }
+
+       return (sysctl_handle_int(oidp, &sc->params.core_vdd, 0, req));
 }
 
 static int
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