+++ /dev/null
-/*******************************************************************************
- *
- * 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_I40E_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_I40E_CONFIGFS_FS) */
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