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Commit cde49a42 authored by Vasundhara Volam's avatar Vasundhara Volam Committed by David S. Miller
Browse files

bnxt_en: Add hwmon sysfs support to read temperature 



Export temperature sensor reading via hwmon sysfs.

Signed-off-by: default avatarVasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 25e1acd6

drivers/net/ethernet/broadcom/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -230,4 +230,12 @@ config BNXT_DCB 


	  If unsure, say N.



config BNXT_HWMON

	bool "Broadcom NetXtreme-C/E HWMON support"

	default y

	depends on BNXT && HWMON && !(BNXT=y && HWMON=m)

	---help---

	  Say Y if you want to expose the thermal sensor data on NetXtreme-C/E

	  devices, via the hwmon sysfs interface.



endif # NET_VENDOR_BROADCOM

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+62 −0
Original line number Diff line number Diff line
@@ -51,6 +51,8 @@ 
#include <linux/cpu_rmap.h>

#include <linux/cpumask.h>

#include <net/pkt_cls.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>



#include "bnxt_hsi.h"

#include "bnxt.h"
@@ -6789,6 +6791,62 @@ static void bnxt_get_wol_settings(struct bnxt *bp) 
	} while (handle && handle != 0xffff);

}



#ifdef CONFIG_BNXT_HWMON

static ssize_t bnxt_show_temp(struct device *dev,

			      struct device_attribute *devattr, char *buf)

{

	struct hwrm_temp_monitor_query_input req = {0};

	struct hwrm_temp_monitor_query_output *resp;

	struct bnxt *bp = dev_get_drvdata(dev);

	u32 temp = 0;



	resp = bp->hwrm_cmd_resp_addr;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_TEMP_MONITOR_QUERY, -1, -1);

	mutex_lock(&bp->hwrm_cmd_lock);

	if (!_hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))

		temp = resp->temp * 1000; /* display millidegree */

	mutex_unlock(&bp->hwrm_cmd_lock);



	return sprintf(buf, "%u\n", temp);

}

static SENSOR_DEVICE_ATTR(temp1_input, 0444, bnxt_show_temp, NULL, 0);



static struct attribute *bnxt_attrs[] = {

	&sensor_dev_attr_temp1_input.dev_attr.attr,

	NULL

};

ATTRIBUTE_GROUPS(bnxt);



static void bnxt_hwmon_close(struct bnxt *bp)

{

	if (bp->hwmon_dev) {

		hwmon_device_unregister(bp->hwmon_dev);

		bp->hwmon_dev = NULL;

	}

}



static void bnxt_hwmon_open(struct bnxt *bp)

{

	struct pci_dev *pdev = bp->pdev;



	bp->hwmon_dev = hwmon_device_register_with_groups(&pdev->dev,

							  DRV_MODULE_NAME, bp,

							  bnxt_groups);

	if (IS_ERR(bp->hwmon_dev)) {

		bp->hwmon_dev = NULL;

		dev_warn(&pdev->dev, "Cannot register hwmon device\n");

	}

}

#else

static void bnxt_hwmon_close(struct bnxt *bp)

{

}



static void bnxt_hwmon_open(struct bnxt *bp)

{

}

#endif



static bool bnxt_eee_config_ok(struct bnxt *bp)

{

	struct ethtool_eee *eee = &bp->eee;
@@ -7040,6 +7098,9 @@ static int bnxt_open(struct net_device *dev) 
	rc = __bnxt_open_nic(bp, true, true);

	if (rc)

		bnxt_hwrm_if_change(bp, false);



	bnxt_hwmon_open(bp);



	return rc;

}
@@ -7102,6 +7163,7 @@ static int bnxt_close(struct net_device *dev) 
{

	struct bnxt *bp = netdev_priv(dev);



	bnxt_hwmon_close(bp);

	bnxt_close_nic(bp, true, true);

	bnxt_hwrm_shutdown_link(bp);

	bnxt_hwrm_if_change(bp, false);

drivers/net/ethernet/broadcom/bnxt/bnxt.h

+1 −0
Original line number Diff line number Diff line
@@ -1411,6 +1411,7 @@ struct bnxt { 
	struct bnxt_tc_info	*tc_info;

	struct dentry		*debugfs_pdev;

	struct dentry		*debugfs_dim;

	struct device		*hwmon_dev;

};



#define BNXT_RX_STATS_OFFSET(counter)			\