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Date:      Sat, 14 Mar 2020 00:49:59 +0000 (UTC)
From:      Navdeep Parhar <np@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org
Subject:   svn commit: r358972 - stable/12/sys/dev/cxgbe
Message-ID:  <202003140049.02E0nxs1010560@repo.freebsd.org>
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Author: np
Date: Sat Mar 14 00:49:59 2020
New Revision: 358972
URL: https://svnweb.freebsd.org/changeset/base/358972

Log:
  MFC r355059:
  
  cxgbe(4): sysctl to reset the temperature/voltage sensor.
  
  # sysctl dev.<nexus>.<inst>.reset_sensor=1
  # sysctl dev.t6nex.0.reset_sensor=1
  
  Sponsored by:	Chelsio Communications

Modified:
  stable/12/sys/dev/cxgbe/adapter.h
  stable/12/sys/dev/cxgbe/t4_main.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/dev/cxgbe/adapter.h
==============================================================================
--- stable/12/sys/dev/cxgbe/adapter.h	Sat Mar 14 00:16:15 2020	(r358971)
+++ stable/12/sys/dev/cxgbe/adapter.h	Sat Mar 14 00:49:59 2020	(r358972)
@@ -897,6 +897,7 @@ struct adapter {
 	int last_op_flags;
 
 	int swintr;
+	int sensor_resets;
 };
 
 #define ADAPTER_LOCK(sc)		mtx_lock(&(sc)->sc_lock)

Modified: stable/12/sys/dev/cxgbe/t4_main.c
==============================================================================
--- stable/12/sys/dev/cxgbe/t4_main.c	Sat Mar 14 00:16:15 2020	(r358971)
+++ stable/12/sys/dev/cxgbe/t4_main.c	Sat Mar 14 00:49:59 2020	(r358972)
@@ -646,6 +646,7 @@ 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_reset_sensor(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);
@@ -6009,6 +6010,9 @@ t4_sysctls(struct adapter *sc)
 	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "temperature", CTLTYPE_INT |
 	    CTLFLAG_RD, sc, 0, sysctl_temperature, "I",
 	    "chip temperature (in Celsius)");
+	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "reset_sensor", CTLTYPE_INT |
+	    CTLFLAG_RW, sc, 0, sysctl_reset_sensor, "I",
+	    "reset the chip's temperature sensor.");
 
 	SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "loadavg", CTLTYPE_STRING |
 	    CTLFLAG_RD, sc, 0, sysctl_loadavg, "A",
@@ -7171,6 +7175,36 @@ sysctl_vdd(SYSCTL_HANDLER_ARGS)
 	}
 
 	return (sysctl_handle_int(oidp, &sc->params.core_vdd, 0, req));
+}
+
+static int
+sysctl_reset_sensor(SYSCTL_HANDLER_ARGS)
+{
+	struct adapter *sc = arg1;
+	int rc, v;
+	uint32_t param, val;
+
+	v = sc->sensor_resets;
+	rc = sysctl_handle_int(oidp, &v, 0, req);
+	if (rc != 0 || req->newptr == NULL || v <= 0)
+		return (rc);
+
+	if (sc->params.fw_vers < FW_VERSION32(1, 24, 7, 0) ||
+	    chip_id(sc) < CHELSIO_T5)
+		return (ENOTSUP);
+
+	rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4srst");
+	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_RESET_TMP_SENSOR));
+	val = 1;
+	rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
+	end_synchronized_op(sc, 0);
+	if (rc == 0)
+		sc->sensor_resets++;
+	return (rc);
 }
 
 static int

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