diff options
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core.c | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core.h | 24 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c | 223 |
5 files changed, 264 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/Kconfig b/drivers/net/ethernet/mellanox/mlxsw/Kconfig index e36e122..ec8caf8 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/Kconfig +++ b/drivers/net/ethernet/mellanox/mlxsw/Kconfig @@ -10,6 +10,14 @@ config MLXSW_CORE To compile this driver as a module, choose M here: the module will be called mlxsw_core. +config MLXSW_CORE_HWMON + bool "HWMON support for Mellanox Technologies Switch ASICs" + depends on MLXSW_CORE && HWMON + depends on !(MLXSW_CORE=y && HWMON=m) + default y + ---help--- + Say Y here if you want to expose HWMON interface on mlxsw devices. + config MLXSW_PCI tristate "PCI bus implementation for Mellanox Technologies Switch ASICs" depends on PCI && HAS_DMA && HAS_IOMEM && MLXSW_CORE diff --git a/drivers/net/ethernet/mellanox/mlxsw/Makefile b/drivers/net/ethernet/mellanox/mlxsw/Makefile index af01581..584cac4 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/Makefile +++ b/drivers/net/ethernet/mellanox/mlxsw/Makefile @@ -1,5 +1,6 @@ obj-$(CONFIG_MLXSW_CORE) += mlxsw_core.o mlxsw_core-objs := core.o +mlxsw_core-$(CONFIG_MLXSW_CORE_HWMON) += core_hwmon.o obj-$(CONFIG_MLXSW_PCI) += mlxsw_pci.o mlxsw_pci-objs := pci.o obj-$(CONFIG_MLXSW_SWITCHX2) += mlxsw_switchx2.o diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c index 97f0d93..1ecb4aa 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core.c @@ -105,6 +105,7 @@ struct mlxsw_core { struct debugfs_blob_wrapper vsd_blob; struct debugfs_blob_wrapper psid_blob; } dbg; + struct mlxsw_hwmon *hwmon; unsigned long driver_priv[0]; /* driver_priv has to be always the last item */ }; @@ -822,6 +823,10 @@ int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, if (err) goto err_emad_init; + err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon); + if (err) + goto err_hwmon_init; + err = mlxsw_driver->init(mlxsw_core->driver_priv, mlxsw_core, mlxsw_bus_info); if (err) @@ -836,6 +841,8 @@ int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, err_debugfs_init: mlxsw_core->driver->fini(mlxsw_core->driver_priv); err_driver_init: + mlxsw_hwmon_fini(mlxsw_core->hwmon); +err_hwmon_init: mlxsw_emad_fini(mlxsw_core); err_emad_init: mlxsw_bus->fini(bus_priv); @@ -855,6 +862,7 @@ void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core) mlxsw_core_debugfs_fini(mlxsw_core); mlxsw_core->driver->fini(mlxsw_core->driver_priv); + mlxsw_hwmon_fini(mlxsw_core->hwmon); mlxsw_emad_fini(mlxsw_core); mlxsw_core->bus->fini(mlxsw_core->bus_priv); free_percpu(mlxsw_core->pcpu_stats); diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h index 8078273..5ac9529 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core.h +++ b/drivers/net/ethernet/mellanox/mlxsw/core.h @@ -209,4 +209,28 @@ struct mlxsw_bus_info { u8 psid[MLXSW_CMD_BOARDINFO_PSID_LEN]; }; +struct mlxsw_hwmon; + +#ifdef CONFIG_MLXSW_CORE_HWMON + +int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core, + const struct mlxsw_bus_info *mlxsw_bus_info, + struct mlxsw_hwmon **p_hwmon); +void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon); + +#else + +static inline int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core, + const struct mlxsw_bus_info *mlxsw_bus_info, + struct mlxsw_hwmon **p_hwmon) +{ + return 0; +} + +static inline void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon) +{ +} + +#endif + #endif diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c new file mode 100644 index 0000000..ec48c28 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c @@ -0,0 +1,223 @@ +/* + * drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c + * Copyright (c) 2015 Mellanox Technologies. All rights reserved. + * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/device.h> +#include <linux/sysfs.h> +#include <linux/hwmon.h> +#include <linux/err.h> + +#include "core.h" + +#define MLXSW_HWMON_TEMP_SENSOR_MAX_COUNT 127 +#define MLXSW_HWMON_ATTR_COUNT (MLXSW_HWMON_TEMP_SENSOR_MAX_COUNT * 4) + +struct mlxsw_hwmon_attr { + struct device_attribute dev_attr; + struct mlxsw_hwmon *hwmon; + unsigned int type_index; + char name[16]; +}; + +struct mlxsw_hwmon { + struct mlxsw_core *core; + const struct mlxsw_bus_info *bus_info; + struct device *hwmon_dev; + struct attribute_group group; + const struct attribute_group *groups[2]; + struct attribute *attrs[MLXSW_HWMON_ATTR_COUNT + 1]; + struct mlxsw_hwmon_attr hwmon_attrs[MLXSW_HWMON_ATTR_COUNT]; + unsigned int attrs_count; +}; + +static ssize_t mlxsw_hwmon_temp_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlwsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon *mlxsw_hwmon = mlwsw_hwmon_attr->hwmon; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + unsigned int temp; + int err; + + mlxsw_reg_mtmp_pack(mtmp_pl, mlwsw_hwmon_attr->type_index, + false, false); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query temp sensor\n"); + return err; + } + mlxsw_reg_mtmp_unpack(mtmp_pl, &temp, NULL, NULL); + return sprintf(buf, "%u\n", temp); +} + +static ssize_t mlxsw_hwmon_temp_max_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mlxsw_hwmon_attr *mlwsw_hwmon_attr = + container_of(attr, struct mlxsw_hwmon_attr, dev_attr); + struct mlxsw_hwmon *mlxsw_hwmon = mlwsw_hwmon_attr->hwmon; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + unsigned int temp_max; + int err; + + mlxsw_reg_mtmp_pack(mtmp_pl, mlwsw_hwmon_attr->type_index, + false, false); + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to query temp sensor\n"); + return err; + } + mlxsw_reg_mtmp_unpack(mtmp_pl, NULL, &temp_max, NULL); + return sprintf(buf, "%u\n", temp_max); +} + +enum mlxsw_hwmon_attr_type { + MLXSW_HWMON_ATTR_TYPE_TEMP, + MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, +}; + +static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon *mlxsw_hwmon, + enum mlxsw_hwmon_attr_type attr_type, + unsigned int type_index, unsigned int num) { + struct mlxsw_hwmon_attr *mlxsw_hwmon_attr; + unsigned int attr_index; + + attr_index = mlxsw_hwmon->attrs_count; + mlxsw_hwmon_attr = &mlxsw_hwmon->hwmon_attrs[attr_index]; + + switch (attr_type) { + case MLXSW_HWMON_ATTR_TYPE_TEMP: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = S_IRUGO; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_input", num + 1); + break; + case MLXSW_HWMON_ATTR_TYPE_TEMP_MAX: + mlxsw_hwmon_attr->dev_attr.show = mlxsw_hwmon_temp_max_show; + mlxsw_hwmon_attr->dev_attr.attr.mode = S_IRUGO; + snprintf(mlxsw_hwmon_attr->name, sizeof(mlxsw_hwmon_attr->name), + "temp%u_highest", num + 1); + break; + default: + BUG(); + } + + mlxsw_hwmon_attr->type_index = type_index; + mlxsw_hwmon_attr->hwmon = mlxsw_hwmon; + mlxsw_hwmon_attr->dev_attr.attr.name = mlxsw_hwmon_attr->name; + sysfs_attr_init(&mlxsw_hwmon_attr->dev_attr.attr); + + mlxsw_hwmon->attrs[attr_index] = &mlxsw_hwmon_attr->dev_attr.attr; + mlxsw_hwmon->attrs_count++; +} + +static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon *mlxsw_hwmon) +{ + char mtcap_pl[MLXSW_REG_MTCAP_LEN]; + char mtmp_pl[MLXSW_REG_MTMP_LEN]; + u8 sensor_count; + int i; + int err; + + err = mlxsw_reg_query(mlxsw_hwmon->core, MLXSW_REG(mtcap), mtcap_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to get number of temp sensors\n"); + return err; + } + sensor_count = mlxsw_reg_mtcap_sensor_count_get(mtcap_pl); + for (i = 0; i < sensor_count; i++) { + mlxsw_reg_mtmp_pack(mtmp_pl, 0, true, true); + err = mlxsw_reg_write(mlxsw_hwmon->core, + MLXSW_REG(mtmp), mtmp_pl); + if (err) { + dev_err(mlxsw_hwmon->bus_info->dev, "Failed to setup temp sensor number %d\n", + i); + return err; + } + mlxsw_hwmon_attr_add(mlxsw_hwmon, + MLXSW_HWMON_ATTR_TYPE_TEMP, i, i); + mlxsw_hwmon_attr_add(mlxsw_hwmon, + MLXSW_HWMON_ATTR_TYPE_TEMP_MAX, i, i); + } + return 0; +} + +int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core, + const struct mlxsw_bus_info *mlxsw_bus_info, + struct mlxsw_hwmon **p_hwmon) +{ + struct mlxsw_hwmon *mlxsw_hwmon; + struct device *hwmon_dev; + int err; + + mlxsw_hwmon = kzalloc(sizeof(*mlxsw_hwmon), GFP_KERNEL); + if (!mlxsw_hwmon) + return -ENOMEM; + mlxsw_hwmon->core = mlxsw_core; + mlxsw_hwmon->bus_info = mlxsw_bus_info; + + err = mlxsw_hwmon_temp_init(mlxsw_hwmon); + if (err) + goto err_temp_init; + + mlxsw_hwmon->groups[0] = &mlxsw_hwmon->group; + mlxsw_hwmon->group.attrs = mlxsw_hwmon->attrs; + + hwmon_dev = devm_hwmon_device_register_with_groups(mlxsw_bus_info->dev, + "mlxsw", + mlxsw_hwmon, + mlxsw_hwmon->groups); + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + goto err_hwmon_register; + } + + mlxsw_hwmon->hwmon_dev = hwmon_dev; + *p_hwmon = mlxsw_hwmon; + return 0; + +err_hwmon_register: +err_temp_init: + kfree(mlxsw_hwmon); + return err; +} + +void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon) +{ + kfree(mlxsw_hwmon); +} |
