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-rw-r--r--net/dsa/dsa.c171
1 files changed, 151 insertions, 20 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 6317b41c99b0..37317149f918 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -9,6 +9,9 @@
* (at your option) any later version.
*/
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/hwmon.h>
#include <linux/list.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -17,6 +20,7 @@
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_platform.h>
+#include <linux/sysfs.h>
#include "dsa_priv.h"
char dsa_driver_version[] = "0.1";
@@ -71,6 +75,104 @@ dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name)
return ret;
}
+/* hwmon support ************************************************************/
+
+#ifdef CONFIG_NET_DSA_HWMON
+
+static ssize_t temp1_input_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ int temp, ret;
+
+ ret = ds->drv->get_temp(ds, &temp);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", temp * 1000);
+}
+static DEVICE_ATTR_RO(temp1_input);
+
+static ssize_t temp1_max_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ int temp, ret;
+
+ ret = ds->drv->get_temp_limit(ds, &temp);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", temp * 1000);
+}
+
+static ssize_t temp1_max_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ int temp, ret;
+
+ ret = kstrtoint(buf, 0, &temp);
+ if (ret < 0)
+ return ret;
+
+ ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000));
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+static DEVICE_ATTR(temp1_max, S_IRUGO, temp1_max_show, temp1_max_store);
+
+static ssize_t temp1_max_alarm_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ bool alarm;
+ int ret;
+
+ ret = ds->drv->get_temp_alarm(ds, &alarm);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", alarm);
+}
+static DEVICE_ATTR_RO(temp1_max_alarm);
+
+static struct attribute *dsa_hwmon_attrs[] = {
+ &dev_attr_temp1_input.attr, /* 0 */
+ &dev_attr_temp1_max.attr, /* 1 */
+ &dev_attr_temp1_max_alarm.attr, /* 2 */
+ NULL
+};
+
+static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj,
+ struct attribute *attr, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct dsa_switch *ds = dev_get_drvdata(dev);
+ struct dsa_switch_driver *drv = ds->drv;
+ umode_t mode = attr->mode;
+
+ if (index == 1) {
+ if (!drv->get_temp_limit)
+ mode = 0;
+ else if (drv->set_temp_limit)
+ mode |= S_IWUSR;
+ } else if (index == 2 && !drv->get_temp_alarm) {
+ mode = 0;
+ }
+ return mode;
+}
+
+static const struct attribute_group dsa_hwmon_group = {
+ .attrs = dsa_hwmon_attrs,
+ .is_visible = dsa_hwmon_attrs_visible,
+};
+__ATTRIBUTE_GROUPS(dsa_hwmon);
+
+#endif /* CONFIG_NET_DSA_HWMON */
/* basic switch operations **************************************************/
static struct dsa_switch *
@@ -90,12 +192,12 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
*/
drv = dsa_switch_probe(host_dev, pd->sw_addr, &name);
if (drv == NULL) {
- printk(KERN_ERR "%s[%d]: could not detect attached switch\n",
- dst->master_netdev->name, index);
+ netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
+ index);
return ERR_PTR(-EINVAL);
}
- printk(KERN_INFO "%s[%d]: detected a %s switch\n",
- dst->master_netdev->name, index, name);
+ netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
+ index, name);
/*
@@ -123,7 +225,8 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
if (!strcmp(name, "cpu")) {
if (dst->cpu_switch != -1) {
- printk(KERN_ERR "multiple cpu ports?!\n");
+ netdev_err(dst->master_netdev,
+ "multiple cpu ports?!\n");
ret = -EINVAL;
goto out;
}
@@ -218,16 +321,39 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
slave_dev = dsa_slave_create(ds, parent, i, pd->port_names[i]);
if (slave_dev == NULL) {
- printk(KERN_ERR "%s[%d]: can't create dsa "
- "slave device for port %d(%s)\n",
- dst->master_netdev->name,
- index, i, pd->port_names[i]);
+ netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n",
+ index, i, pd->port_names[i]);
continue;
}
ds->ports[i] = slave_dev;
}
+#ifdef CONFIG_NET_DSA_HWMON
+ /* If the switch provides a temperature sensor,
+ * register with hardware monitoring subsystem.
+ * Treat registration error as non-fatal and ignore it.
+ */
+ if (drv->get_temp) {
+ const char *netname = netdev_name(dst->master_netdev);
+ char hname[IFNAMSIZ + 1];
+ int i, j;
+
+ /* Create valid hwmon 'name' attribute */
+ for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) {
+ if (isalnum(netname[i]))
+ hname[j++] = netname[i];
+ }
+ hname[j] = '\0';
+ scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d",
+ hname, index);
+ ds->hwmon_dev = hwmon_device_register_with_groups(NULL,
+ ds->hwmon_name, ds, dsa_hwmon_groups);
+ if (IS_ERR(ds->hwmon_dev))
+ ds->hwmon_dev = NULL;
+ }
+#endif /* CONFIG_NET_DSA_HWMON */
+
return ds;
out_free:
@@ -239,6 +365,10 @@ out:
static void dsa_switch_destroy(struct dsa_switch *ds)
{
+#ifdef CONFIG_NET_DSA_HWMON
+ if (ds->hwmon_dev)
+ hwmon_device_unregister(ds->hwmon_dev);
+#endif
}
#ifdef CONFIG_PM_SLEEP
@@ -396,7 +526,8 @@ static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
/* First time routing table allocation */
if (!cd->rtable) {
- cd->rtable = kmalloc(pd->nr_chips * sizeof(s8), GFP_KERNEL);
+ cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8),
+ GFP_KERNEL);
if (!cd->rtable)
return -ENOMEM;
@@ -447,6 +578,7 @@ static int dsa_of_probe(struct platform_device *pdev)
const char *port_name;
int chip_index, port_index;
const unsigned int *sw_addr, *port_reg;
+ u32 eeprom_len;
int ret;
mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
@@ -475,8 +607,8 @@ static int dsa_of_probe(struct platform_device *pdev)
if (pd->nr_chips > DSA_MAX_SWITCHES)
pd->nr_chips = DSA_MAX_SWITCHES;
- pd->chip = kzalloc(pd->nr_chips * sizeof(struct dsa_chip_data),
- GFP_KERNEL);
+ pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
+ GFP_KERNEL);
if (!pd->chip) {
ret = -ENOMEM;
goto out_free;
@@ -498,6 +630,9 @@ static int dsa_of_probe(struct platform_device *pdev)
if (cd->sw_addr > PHY_MAX_ADDR)
continue;
+ if (!of_property_read_u32(np, "eeprom-length", &eeprom_len))
+ cd->eeprom_len = eeprom_len;
+
for_each_available_child_of_node(child, port) {
port_reg = of_get_property(port, "reg", NULL);
if (!port_reg)
@@ -566,15 +701,13 @@ static inline void dsa_of_remove(struct platform_device *pdev)
static int dsa_probe(struct platform_device *pdev)
{
- static int dsa_version_printed;
struct dsa_platform_data *pd = pdev->dev.platform_data;
struct net_device *dev;
struct dsa_switch_tree *dst;
int i, ret;
- if (!dsa_version_printed++)
- printk(KERN_NOTICE "Distributed Switch Architecture "
- "driver version %s\n", dsa_driver_version);
+ pr_notice_once("Distributed Switch Architecture driver version %s\n",
+ dsa_driver_version);
if (pdev->dev.of_node) {
ret = dsa_of_probe(pdev);
@@ -618,9 +751,8 @@ static int dsa_probe(struct platform_device *pdev)
ds = dsa_switch_setup(dst, i, &pdev->dev, pd->chip[i].host_dev);
if (IS_ERR(ds)) {
- printk(KERN_ERR "%s[%d]: couldn't create dsa switch "
- "instance (error %ld)\n", dev->name, i,
- PTR_ERR(ds));
+ netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
+ i, PTR_ERR(ds));
continue;
}
@@ -747,7 +879,6 @@ static struct platform_driver dsa_driver = {
.shutdown = dsa_shutdown,
.driver = {
.name = "dsa",
- .owner = THIS_MODULE,
.of_match_table = dsa_of_match_table,
.pm = &dsa_pm_ops,
},
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.