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bnxt_en: Add hwmon sysfs support to read temperature

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Export temperature sensor reading via hwmon sysfs.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vasundhara Volam 2018-08-05 16:51:56 -04:00 committed by David S. Miller
parent 25e1acd6b9
commit cde49a42a9
3 changed files with 71 additions and 0 deletions
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8
drivers/net/ethernet/broadcom/Kconfig
View File

@ -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

62
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -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);

1
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -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) \