i40e: Implement configfs for NPAR BW configuration (96664483) · Commits · 戴 / test

drivers/net/ethernet/intel/i40e/Makefile

+2 −1

Original line number	Diff line number	Diff line
		################################################################################
		#
		# Intel Ethernet Controller XL710 Family Linux Driver
		# Copyright(c) 2013 - 2014 Intel Corporation.
		# Copyright(c) 2013 - 2015 Intel Corporation.
		#
		# This program is free software; you can redistribute it and/or modify it
		# under the terms and conditions of the GNU General Public License,
		@@ -37,6 +37,7 @@ i40e-objs := i40e_main.o \
		i40e_hmc.o \
		i40e_lan_hmc.o \
		i40e_nvm.o \
		i40e_configfs.o \
		i40e_debugfs.o \
		i40e_diag.o \
		i40e_txrx.o \

drivers/net/ethernet/intel/i40e/i40e.h

+5 −2

Original line number	Diff line number	Diff line
		@@ -688,6 +688,7 @@ int i40e_vlan_rx_add_vid(struct net_device *netdev,
		int i40e_vlan_rx_kill_vid(struct net_device *netdev,
		__always_unused __be16 proto, u16 vid);
		#endif
		int i40e_open(struct net_device *netdev);
		int i40e_vsi_open(struct i40e_vsi *vsi);
		void i40e_vlan_stripping_disable(struct i40e_vsi *vsi);
		int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid);
		@@ -698,7 +699,6 @@ bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi);
		struct i40e_mac_filter i40e_find_mac(struct i40e_vsi vsi, u8 *macaddr,
		bool is_vf, bool is_netdev);
		#ifdef I40E_FCOE
		int i40e_open(struct net_device *netdev);
		int i40e_close(struct net_device *netdev);
		int i40e_setup_tc(struct net_device *netdev, u8 tc);
		void i40e_netpoll(struct net_device *netdev);
		@@ -735,7 +735,10 @@ int i40e_ptp_set_ts_config(struct i40e_pf pf, struct ifreq ifr);
		int i40e_ptp_get_ts_config(struct i40e_pf pf, struct ifreq ifr);
		void i40e_ptp_init(struct i40e_pf *pf);
		void i40e_ptp_stop(struct i40e_pf *pf);

		#if IS_ENABLED(CONFIG_CONFIGFS_FS)
		int i40e_configfs_init(void);
		void i40e_configfs_exit(void);
		#endif /* CONFIG_CONFIGFS_FS */
		i40e_status i40e_get_npar_bw_setting(struct i40e_pf *pf);
		i40e_status i40e_set_npar_bw_setting(struct i40e_pf *pf);
		i40e_status i40e_commit_npar_bw_setting(struct i40e_pf *pf);

drivers/net/ethernet/intel/i40e/i40e_configfs.c

0 → 100644

+354 −0

Original line number	Diff line number	Diff line
		/*******************************************************************************
		*
		* Intel Ethernet Controller XL710 Family Linux Driver
		* Copyright(c) 2013 - 2015 Intel Corporation.
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope it will be useful, but WITHOUT
		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
		* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
		* more details.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program. If not, see <http://www.gnu.org/licenses/>.
		*
		* The full GNU General Public License is included in this distribution in
		* the file called "COPYING".
		*
		* Contact Information:
		* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
		* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
		*
		******************************************************************************/

		#include <linux/configfs.h>
		#include "i40e.h"

		#if IS_ENABLED(CONFIG_CONFIGFS_FS)

		/**
		* configfs structure for i40e
		*
		* This file adds code for configfs support for the i40e driver. This sets
		* up a filesystem under /sys/kernel/config in which configuration changes
		* can be made for the driver's netdevs.
		*
		* The initialization in this code creates the "i40e" entry in the configfs
		* system. After that, the user needs to use mkdir to create configurations
		* for specific netdev ports; for example "mkdir eth3". This code will verify
		* that such a netdev exists and that it is owned by i40e.
		*
		**/

		struct i40e_cfgfs_vsi {
		struct config_item item;
		struct i40e_vsi *vsi;
		};

		static inline struct i40e_cfgfs_vsi to_i40e_cfgfs_vsi(struct config_item item)
		{
		return item ? container_of(item, struct i40e_cfgfs_vsi, item) : NULL;
		}

		static struct configfs_attribute i40e_cfgfs_vsi_attr_min_bw = {
		.ca_owner = THIS_MODULE,
		.ca_name = "min_bw",
		.ca_mode = S_IRUGO \| S_IWUSR,
		};

		static struct configfs_attribute i40e_cfgfs_vsi_attr_max_bw = {
		.ca_owner = THIS_MODULE,
		.ca_name = "max_bw",
		.ca_mode = S_IRUGO \| S_IWUSR,
		};

		static struct configfs_attribute i40e_cfgfs_vsi_attr_commit = {
		.ca_owner = THIS_MODULE,
		.ca_name = "commit",
		.ca_mode = S_IRUGO \| S_IWUSR,
		};

		static struct configfs_attribute i40e_cfgfs_vsi_attr_port_count = {
		.ca_owner = THIS_MODULE,
		.ca_name = "ports",
		.ca_mode = S_IRUGO \| S_IWUSR,
		};

		static struct configfs_attribute i40e_cfgfs_vsi_attr_part_count = {
		.ca_owner = THIS_MODULE,
		.ca_name = "partitions",
		.ca_mode = S_IRUGO \| S_IWUSR,
		};

		static struct configfs_attribute *i40e_cfgfs_vsi_attrs[] = {
		&i40e_cfgfs_vsi_attr_min_bw,
		&i40e_cfgfs_vsi_attr_max_bw,
		&i40e_cfgfs_vsi_attr_commit,
		&i40e_cfgfs_vsi_attr_port_count,
		&i40e_cfgfs_vsi_attr_part_count,
		NULL,
		};

		/**
		* i40e_cfgfs_vsi_attr_show - Show a VSI's NPAR BW partition info
		* @item: A pointer back to the configfs item created on driver load
		* @attr: A pointer to this item's configuration attribute
		* @page: A pointer to the output buffer
		**/
		static ssize_t i40e_cfgfs_vsi_attr_show(struct config_item *item,
		struct configfs_attribute *attr,
		char *page)
		{
		struct i40e_cfgfs_vsi *i40e_cfgfs_vsi = to_i40e_cfgfs_vsi(item);
		struct i40e_pf *pf = i40e_cfgfs_vsi->vsi->back;
		ssize_t count;

		if (i40e_cfgfs_vsi->vsi != pf->vsi[pf->lan_vsi])
		return 0;

		if (strncmp(attr->ca_name, "min_bw", 6) == 0)
		count = sprintf(page, "%s %s %d%%\n",
		i40e_cfgfs_vsi->vsi->netdev->name,
		(pf->npar_min_bw & I40E_ALT_BW_RELATIVE_MASK) ?
		"Relative Min BW" : "Absolute Min BW",
		pf->npar_min_bw & I40E_ALT_BW_VALUE_MASK);
		else if (strncmp(attr->ca_name, "max_bw", 6) == 0)
		count = sprintf(page, "%s %s %d%%\n",
		i40e_cfgfs_vsi->vsi->netdev->name,
		(pf->npar_max_bw & I40E_ALT_BW_RELATIVE_MASK) ?
		"Relative Max BW" : "Absolute Max BW",
		pf->npar_max_bw & I40E_ALT_BW_VALUE_MASK);
		else if (strncmp(attr->ca_name, "ports", 5) == 0)
		count = sprintf(page, "%d\n",
		pf->hw.num_ports);
		else if (strncmp(attr->ca_name, "partitions", 10) == 0)
		count = sprintf(page, "%d\n",
		pf->hw.num_partitions);
		else
		return 0;

		return count;
		}

		/**
		* i40e_cfgfs_vsi_attr_store - Show a VSI's NPAR BW partition info
		* @item: A pointer back to the configfs item created on driver load
		* @attr: A pointer to this item's configuration attribute
		* @page: A pointer to the user input buffer holding the user input values
		**/
		static ssize_t i40e_cfgfs_vsi_attr_store(struct config_item *item,
		struct configfs_attribute *attr,
		const char *page, size_t count)
		{
		struct i40e_cfgfs_vsi *i40e_cfgfs_vsi = to_i40e_cfgfs_vsi(item);
		struct i40e_pf *pf = i40e_cfgfs_vsi->vsi->back;
		char p = (char )page;
		int rc;
		unsigned long tmp;

		if (i40e_cfgfs_vsi->vsi != pf->vsi[pf->lan_vsi])
		return 0;

		if (!p \|\| (p && (p == '\n')))
		return -EINVAL;

		rc = kstrtoul(p, 10, &tmp);
		if (rc)
		return rc;
		if (tmp > 100)
		return -ERANGE;

		if (strncmp(attr->ca_name, "min_bw", 6) == 0) {
		if (tmp > (pf->npar_max_bw & I40E_ALT_BW_VALUE_MASK))
		return -ERANGE;
		/* Preserve the valid and relative BW bits - the rest is
		* don't care.
		*/
		pf->npar_min_bw &= (I40E_ALT_BW_RELATIVE_MASK \|
		I40E_ALT_BW_VALID_MASK);
		pf->npar_min_bw \|= (tmp & I40E_ALT_BW_VALUE_MASK);
		i40e_set_npar_bw_setting(pf);
		} else if (strncmp(attr->ca_name, "max_bw", 6) == 0) {
		if (tmp < 1 \|\|
		tmp < (pf->npar_min_bw & I40E_ALT_BW_VALUE_MASK))
		return -ERANGE;
		/* Preserve the valid and relative BW bits - the rest is
		* don't care.
		*/
		pf->npar_max_bw &= (I40E_ALT_BW_RELATIVE_MASK \|
		I40E_ALT_BW_VALID_MASK);
		pf->npar_max_bw \|= (tmp & I40E_ALT_BW_VALUE_MASK);
		i40e_set_npar_bw_setting(pf);
		} else if (strncmp(attr->ca_name, "commit", 6) == 0 && tmp == 1) {
		if (i40e_commit_npar_bw_setting(pf))
		return -EIO;
		}

		return count;
		}

		/**
		* i40e_cfgfs_vsi_release - Free up the configuration item memory
		* @item: A pointer back to the configfs item created on driver load
		**/
		static void i40e_cfgfs_vsi_release(struct config_item *item)
		{
		kfree(to_i40e_cfgfs_vsi(item));
		}

		static struct configfs_item_operations i40e_cfgfs_vsi_item_ops = {
		.release = i40e_cfgfs_vsi_release,
		.show_attribute = i40e_cfgfs_vsi_attr_show,
		.store_attribute = i40e_cfgfs_vsi_attr_store,
		};

		static struct config_item_type i40e_cfgfs_vsi_type = {
		.ct_item_ops = &i40e_cfgfs_vsi_item_ops,
		.ct_attrs = i40e_cfgfs_vsi_attrs,
		.ct_owner = THIS_MODULE,
		};

		struct i40e_cfgfs_group {
		struct config_group group;
		};

		/**
		* to_i40e_cfgfs_group - Get the group pointer from the config item
		* @item: A pointer back to the configfs item created on driver load
		**/
		static inline struct i40e_cfgfs_group *
		to_i40e_cfgfs_group(struct config_item *item)
		{
		return item ? container_of(to_config_group(item),
		struct i40e_cfgfs_group, group) : NULL;
		}

		/**
		* i40e_cfgfs_group_make_item - Create the configfs item with group container
		* @group: A pointer to our configfs group
		* @name: A pointer to the nume of the device we're looking for
		**/
		static struct config_item *
		i40e_cfgfs_group_make_item(struct config_group group, const char name)
		{
		struct i40e_cfgfs_vsi *i40e_cfgfs_vsi;
		struct net_device *netdev;
		struct i40e_netdev_priv *np;

		read_lock(&dev_base_lock);
		netdev = first_net_device(&init_net);
		while (netdev) {
		if (strncmp(netdev->name, name, sizeof(netdev->name)) == 0)
		break;
		netdev = next_net_device(netdev);
		}
		read_unlock(&dev_base_lock);

		if (!netdev)
		return ERR_PTR(-ENODEV);

		/* is this netdev owned by i40e? */
		if (netdev->netdev_ops->ndo_open != i40e_open)
		return ERR_PTR(-EACCES);

		i40e_cfgfs_vsi = kzalloc(sizeof(*i40e_cfgfs_vsi), GFP_KERNEL);
		if (!i40e_cfgfs_vsi)
		return ERR_PTR(-ENOMEM);

		np = netdev_priv(netdev);
		i40e_cfgfs_vsi->vsi = np->vsi;
		config_item_init_type_name(&i40e_cfgfs_vsi->item, name,
		&i40e_cfgfs_vsi_type);

		return &i40e_cfgfs_vsi->item;
		}

		static struct configfs_attribute i40e_cfgfs_group_attr_description = {
		.ca_owner = THIS_MODULE,
		.ca_name = "description",
		.ca_mode = S_IRUGO,
		};

		static struct configfs_attribute *i40e_cfgfs_group_attrs[] = {
		&i40e_cfgfs_group_attr_description,
		NULL,
		};

		static ssize_t i40e_cfgfs_group_attr_show(struct config_item *item,
		struct configfs_attribute *attr,
		char *page)
		{
		return sprintf(page,
		"i40e\n"
		"\n"
		"This subsystem allows the modification of network port configurations.\n"
		"To start, use the name of the network port to be configured in a 'mkdir'\n"
		"command, e.g. 'mkdir eth3'.\n");
		}

		static void i40e_cfgfs_group_release(struct config_item *item)
		{
		kfree(to_i40e_cfgfs_group(item));
		}

		static struct configfs_item_operations i40e_cfgfs_group_item_ops = {
		.release = i40e_cfgfs_group_release,
		.show_attribute = i40e_cfgfs_group_attr_show,
		};

		/* Note that, since no extra work is required on ->drop_item(),
		* no ->drop_item() is provided.
		*/
		static struct configfs_group_operations i40e_cfgfs_group_ops = {
		.make_item = i40e_cfgfs_group_make_item,
		};

		static struct config_item_type i40e_cfgfs_group_type = {
		.ct_item_ops = &i40e_cfgfs_group_item_ops,
		.ct_group_ops = &i40e_cfgfs_group_ops,
		.ct_attrs = i40e_cfgfs_group_attrs,
		.ct_owner = THIS_MODULE,
		};

		static struct configfs_subsystem i40e_cfgfs_group_subsys = {
		.su_group = {
		.cg_item = {
		.ci_namebuf = "i40e",
		.ci_type = &i40e_cfgfs_group_type,
		},
		},
		};

		/**
		* i40e_configfs_init - Initialize configfs support for our driver
		**/
		int i40e_configfs_init(void)
		{
		int ret;
		struct configfs_subsystem *subsys;

		subsys = &i40e_cfgfs_group_subsys;

		config_group_init(&subsys->su_group);
		mutex_init(&subsys->su_mutex);
		ret = configfs_register_subsystem(subsys);
		if (ret) {
		pr_err("Error %d while registering configfs subsystem %s\n",
		ret, subsys->su_group.cg_item.ci_namebuf);
		return ret;
		}

		return 0;
		}

		/**
		* i40e_configfs_init - Bail out - unregister configfs subsystem and release
		**/
		void i40e_configfs_exit(void)
		{
		configfs_unregister_subsystem(&i40e_cfgfs_group_subsys);
		}
		#endif /* IS_ENABLED(CONFIG_CONFIGFS_FS) */

drivers/net/ethernet/intel/i40e/i40e_main.c

+8 −5

Original line number	Diff line number	Diff line
		@@ -4835,11 +4835,7 @@ exit:
		*
		* Returns 0 on success, negative value on failure
		**/
		#ifdef I40E_FCOE
		int i40e_open(struct net_device *netdev)
		#else
		static int i40e_open(struct net_device *netdev)
		#endif
		{
		struct i40e_netdev_priv *np = netdev_priv(netdev);
		struct i40e_vsi *vsi = np->vsi;
		@@ -7741,7 +7737,7 @@ static int i40e_ndo_fdb_add(struct ndmsg ndm, struct nlattr tb[],
		return err;
		}

		static const struct net_device_ops i40e_netdev_ops = {
		const struct net_device_ops i40e_netdev_ops = {
		.ndo_open = i40e_open,
		.ndo_stop = i40e_close,
		.ndo_start_xmit = i40e_lan_xmit_frame,
		@@ -9943,6 +9939,10 @@ static int __init i40e_init_module(void)
		pr_info("%s: %s - version %s\n", i40e_driver_name,
		i40e_driver_string, i40e_driver_version_str);
		pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);

		#if IS_ENABLED(CONFIG_CONFIGFS_FS)
		i40e_configfs_init();
		#endif /* CONFIG_CONFIGFS_FS */
		i40e_dbg_init();
		return pci_register_driver(&i40e_driver);
		}
		@@ -9958,5 +9958,8 @@ static void __exit i40e_exit_module(void)
		{
		pci_unregister_driver(&i40e_driver);
		i40e_dbg_exit();
		#if IS_ENABLED(CONFIG_CONFIGFS_FS)
		i40e_configfs_exit();
		#endif /* CONFIG_CONFIGFS_FS */
		}
		module_exit(i40e_exit_module);

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