sfc: Add support for new board sensors

Add support for power and current sensors, which need to be named
differently in sysfs.  Power sensors also require values to be scaled
between MCDI and sysfs, and have no minimum value.

Add definitions of the power, current, fan, and additional temperature
and voltage sensors found on SFA6902F, SFN7022F and SFN7122F.

(Includes a bug fix from Andrew Jackson.)
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/mcdi_mon.c

@@ -21,7 +21,9 @@ enum efx_hwmon_type {
 	EFX_HWMON_UNKNOWN,
 	EFX_HWMON_TEMP,         /* temperature */
 	EFX_HWMON_COOL,         /* cooling device, probably a heatsink */
-	EFX_HWMON_IN            /* input voltage */
+	EFX_HWMON_IN,		/* voltage */
+	EFX_HWMON_CURR,		/* current */
+	EFX_HWMON_POWER,	/* power */
 };
 
 static const struct {
@@ -29,23 +31,52 @@ static const struct {
 	enum efx_hwmon_type hwmon_type;
 	int port;
 } efx_mcdi_sensor_type[] = {
-#define SENSOR(name, label, hwmon_type, port)			\
-	[MC_CMD_SENSOR_##name] = { label, hwmon_type, port }
-	SENSOR(CONTROLLER_TEMP,	   "Controller temp.",	   EFX_HWMON_TEMP, -1),
-	SENSOR(PHY_COMMON_TEMP,	   "PHY temp.",		   EFX_HWMON_TEMP, -1),
-	SENSOR(CONTROLLER_COOLING, "Controller cooling",   EFX_HWMON_COOL, -1),
-	SENSOR(PHY0_TEMP,	   "PHY temp.",		   EFX_HWMON_TEMP, 0),
-	SENSOR(PHY0_COOLING,	   "PHY cooling",	   EFX_HWMON_COOL, 0),
-	SENSOR(PHY1_TEMP,	   "PHY temp.",		   EFX_HWMON_TEMP, 1),
-	SENSOR(PHY1_COOLING,	   "PHY cooling",	   EFX_HWMON_COOL, 1),
-	SENSOR(IN_1V0,		   "1.0V supply",	   EFX_HWMON_IN,   -1),
-	SENSOR(IN_1V2,		   "1.2V supply",	   EFX_HWMON_IN,   -1),
-	SENSOR(IN_1V8,		   "1.8V supply",	   EFX_HWMON_IN,   -1),
-	SENSOR(IN_2V5,		   "2.5V supply",	   EFX_HWMON_IN,   -1),
-	SENSOR(IN_3V3,		   "3.3V supply",	   EFX_HWMON_IN,   -1),
-	SENSOR(IN_12V0,		   "12.0V supply",	   EFX_HWMON_IN,   -1),
-	SENSOR(IN_1V2A,		   "1.2V analogue supply", EFX_HWMON_IN,   -1),
-	SENSOR(IN_VREF,		   "ref. voltage",	   EFX_HWMON_IN,   -1),
+#define SENSOR(name, label, hwmon_type, port)				\
+	[MC_CMD_SENSOR_##name] = { label, EFX_HWMON_ ## hwmon_type, port }
+	SENSOR(CONTROLLER_TEMP,		"Controller ext. temp.",    TEMP,  -1),
+	SENSOR(PHY_COMMON_TEMP,		"PHY temp.",		    TEMP,  -1),
+	SENSOR(CONTROLLER_COOLING,	"Controller cooling",	    COOL,  -1),
+	SENSOR(PHY0_TEMP,		"PHY temp.",		    TEMP,  0),
+	SENSOR(PHY0_COOLING,		"PHY cooling",		    COOL,  0),
+	SENSOR(PHY1_TEMP,		"PHY temp.",		    TEMP,  1),
+	SENSOR(PHY1_COOLING,		"PHY cooling",		    COOL,  1),
+	SENSOR(IN_1V0,			"1.0V supply",		    IN,    -1),
+	SENSOR(IN_1V2,			"1.2V supply",		    IN,    -1),
+	SENSOR(IN_1V8,			"1.8V supply",		    IN,    -1),
+	SENSOR(IN_2V5,			"2.5V supply",		    IN,    -1),
+	SENSOR(IN_3V3,			"3.3V supply",		    IN,    -1),
+	SENSOR(IN_12V0,			"12.0V supply",		    IN,    -1),
+	SENSOR(IN_1V2A,			"1.2V analogue supply",	    IN,    -1),
+	SENSOR(IN_VREF,			"ref. voltage",		    IN,    -1),
+	SENSOR(OUT_VAOE,		"AOE power supply",	    IN,    -1),
+	SENSOR(AOE_TEMP,		"AOE temp.",		    TEMP,  -1),
+	SENSOR(PSU_AOE_TEMP,		"AOE PSU temp.",	    TEMP,  -1),
+	SENSOR(PSU_TEMP,		"Controller PSU temp.",	    TEMP,  -1),
+	SENSOR(FAN_0,			NULL,			    COOL,  -1),
+	SENSOR(FAN_1,			NULL,			    COOL,  -1),
+	SENSOR(FAN_2,			NULL,			    COOL,  -1),
+	SENSOR(FAN_3,			NULL,			    COOL,  -1),
+	SENSOR(FAN_4,			NULL,			    COOL,  -1),
+	SENSOR(IN_VAOE,			"AOE input supply",	    IN,    -1),
+	SENSOR(OUT_IAOE,		"AOE output current",	    CURR,  -1),
+	SENSOR(IN_IAOE,			"AOE input current",	    CURR,  -1),
+	SENSOR(NIC_POWER,		"Board power use",	    POWER, -1),
+	SENSOR(IN_0V9,			"0.9V supply",		    IN,    -1),
+	SENSOR(IN_I0V9,			"0.9V input current",	    CURR,  -1),
+	SENSOR(IN_I1V2,			"1.2V input current",	    CURR,  -1),
+	SENSOR(IN_0V9_ADC,		"0.9V supply (at ADC)",	    IN,    -1),
+	SENSOR(CONTROLLER_2_TEMP,	"Controller ext. temp. 2",  TEMP,  -1),
+	SENSOR(VREG_INTERNAL_TEMP,	"Voltage regulator temp.",  TEMP,  -1),
+	SENSOR(VREG_0V9_TEMP,		"0.9V regulator temp.",     TEMP,  -1),
+	SENSOR(VREG_1V2_TEMP,		"1.2V regulator temp.",     TEMP,  -1),
+	SENSOR(CONTROLLER_VPTAT,       "Controller int. temp. raw", IN,    -1),
+	SENSOR(CONTROLLER_INTERNAL_TEMP, "Controller int. temp.",   TEMP,  -1),
+	SENSOR(CONTROLLER_VPTAT_EXTADC,
+			      "Controller int. temp. raw (at ADC)", IN,    -1),
+	SENSOR(CONTROLLER_INTERNAL_TEMP_EXTADC,
+				 "Controller int. temp. (via ADC)", TEMP,  -1),
+	SENSOR(AMBIENT_TEMP,		"Ambient temp.",	    TEMP,  -1),
+	SENSOR(AIRFLOW,			"Air flow raw",		    IN,    -1),
 #undef SENSOR
 };
 
@@ -160,9 +191,19 @@ static ssize_t efx_mcdi_mon_show_value(struct device *dev,
 
 	value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE);
 
-	/* Convert temperature from degrees to milli-degrees Celsius */
-	if (mon_attr->hwmon_type == EFX_HWMON_TEMP)
+	switch (mon_attr->hwmon_type) {
+	case EFX_HWMON_TEMP:
+		/* Convert temperature from degrees to milli-degrees Celsius */
 		value *= 1000;
+		break;
+	case EFX_HWMON_POWER:
+		/* Convert power from watts to microwatts */
+		value *= 1000000;
+		break;
+	default:
+		/* No conversion needed */
+		break;
+	}
 
 	return sprintf(buf, "%u\n", value);
 }
@@ -177,9 +218,19 @@ static ssize_t efx_mcdi_mon_show_limit(struct device *dev,
 
 	value = mon_attr->limit_value;
 
-	/* Convert temperature from degrees to milli-degrees Celsius */
-	if (mon_attr->hwmon_type == EFX_HWMON_TEMP)
+	switch (mon_attr->hwmon_type) {
+	case EFX_HWMON_TEMP:
+		/* Convert temperature from degrees to milli-degrees Celsius */
 		value *= 1000;
+		break;
+	case EFX_HWMON_POWER:
+		/* Convert power from watts to microwatts */
+		value *= 1000000;
+		break;
+	default:
+		/* No conversion needed */
+		break;
+	}
 
 	return sprintf(buf, "%u\n", value);
 }
@@ -243,8 +294,8 @@ efx_mcdi_mon_add_attr(struct efx_nic *efx, const char *name,
 
 int efx_mcdi_mon_probe(struct efx_nic *efx)
 {
+	unsigned int n_temp = 0, n_cool = 0, n_in = 0, n_curr = 0, n_power = 0;
 	struct efx_mcdi_mon *hwmon = efx_mcdi_mon(efx);
-	unsigned int n_temp = 0, n_cool = 0, n_in = 0;
 	MCDI_DECLARE_BUF(inbuf, MC_CMD_SENSOR_INFO_EXT_IN_LEN);
 	MCDI_DECLARE_BUF(outbuf, MC_CMD_SENSOR_INFO_OUT_LENMAX);
 	unsigned int n_pages, n_sensors, n_attrs, page;
@@ -380,6 +431,14 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
 			hwmon_prefix = "in";
 			hwmon_index = n_in++; /* 0-based */
 			break;
+		case EFX_HWMON_CURR:
+			hwmon_prefix = "curr";
+			hwmon_index = ++n_curr; /* 1-based */
+			break;
+		case EFX_HWMON_POWER:
+			hwmon_prefix = "power";
+			hwmon_index = ++n_power; /* 1-based */
+			break;
 		}
 
 		min1 = MCDI_ARRAY_FIELD(outbuf, SENSOR_ENTRY,
@@ -399,13 +458,15 @@ int efx_mcdi_mon_probe(struct efx_nic *efx)
 			if (rc)
 				goto fail;
 
-			snprintf(name, sizeof(name), "%s%u_min",
-				 hwmon_prefix, hwmon_index);
-			rc = efx_mcdi_mon_add_attr(
-				efx, name, efx_mcdi_mon_show_limit,
-				i, type, min1);
-			if (rc)
-				goto fail;
+			if (hwmon_type != EFX_HWMON_POWER) {
+				snprintf(name, sizeof(name), "%s%u_min",
+					 hwmon_prefix, hwmon_index);
+				rc = efx_mcdi_mon_add_attr(
+					efx, name, efx_mcdi_mon_show_limit,
+					i, type, min1);
+				if (rc)
+					goto fail;
+			}
 
 			snprintf(name, sizeof(name), "%s%u_max",
 				 hwmon_prefix, hwmon_index);