diff options
author | Vasundhara Volam <vasundhara-v.volam@broadcom.com> | 2018-08-05 16:51:56 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-08-05 17:08:26 -0700 |
commit | cde49a42a9bbba18d7f33550fd70037930c14e97 (patch) | |
tree | 0cf94c307dcde29a16c52ae69681b60a0e54bfce | |
parent | 25e1acd6b92bde36c03273d883c44c4d0e8995e6 (diff) |
bnxt_en: Add hwmon sysfs support to read temperature
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>
-rw-r--r-- | drivers/net/ethernet/broadcom/Kconfig | 8 | ||||
-rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.c | 62 | ||||
-rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 |
3 files changed, 71 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig index b7aa8ad96dfb..c1d3ee9baf7e 100644 --- a/drivers/net/ethernet/broadcom/Kconfig +++ b/drivers/net/ethernet/broadcom/Kconfig @@ -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 diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 56bd09758e22..dde904bccab9 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -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); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 6c40b25716d3..006726c02f51 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -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) \ |