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Date: Sun, 5 Aug 2018 16:51:56 -0400
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Subject: [PATCH net-next 11/13] bnxt_en: Add hwmon sysfs support to read temperature
From: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Export temperature sensor reading via hwmon sysfs.
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
drivers/net/ethernet/broadcom/Kconfig | 8 ++++
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 62 +++++++++++++++++++++++++++++++
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 +
3 files changed, 71 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index b7aa8ad..c1d3ee9b 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 56bd097..dde904b 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 6c40b257..006726c 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) \
--
2.5.1
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