360 lines
8.5 KiB
C
360 lines
8.5 KiB
C
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/*
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* Copyright (c) 2015, Mellanox Technologies inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/configfs.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include "core_priv.h"
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#include "cma_priv.h"
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struct cma_device;
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struct cma_dev_group;
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struct cma_dev_port_group {
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unsigned int port_num;
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struct cma_dev_group *cma_dev_group;
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struct config_group group;
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};
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struct cma_dev_group {
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char name[IB_DEVICE_NAME_MAX];
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struct config_group device_group;
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struct config_group ports_group;
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struct cma_dev_port_group *ports;
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};
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static struct cma_dev_port_group *to_dev_port_group(struct config_item *item)
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{
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struct config_group *group;
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if (!item)
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return NULL;
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group = container_of(item, struct config_group, cg_item);
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return container_of(group, struct cma_dev_port_group, group);
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}
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static bool filter_by_name(struct ib_device *ib_dev, void *cookie)
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{
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return !strcmp(dev_name(&ib_dev->dev), cookie);
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}
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static int cma_configfs_params_get(struct config_item *item,
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struct cma_device **pcma_dev,
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struct cma_dev_port_group **pgroup)
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{
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struct cma_dev_port_group *group = to_dev_port_group(item);
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struct cma_device *cma_dev;
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if (!group)
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return -ENODEV;
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cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
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group->cma_dev_group->name);
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if (!cma_dev)
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return -ENODEV;
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*pcma_dev = cma_dev;
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*pgroup = group;
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return 0;
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}
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static void cma_configfs_params_put(struct cma_device *cma_dev)
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{
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cma_deref_dev(cma_dev);
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}
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static ssize_t default_roce_mode_show(struct config_item *item,
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char *buf)
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{
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struct cma_device *cma_dev;
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struct cma_dev_port_group *group;
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int gid_type;
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ssize_t ret;
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ret = cma_configfs_params_get(item, &cma_dev, &group);
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if (ret)
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return ret;
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gid_type = cma_get_default_gid_type(cma_dev, group->port_num);
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cma_configfs_params_put(cma_dev);
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if (gid_type < 0)
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return gid_type;
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return sprintf(buf, "%s\n", ib_cache_gid_type_str(gid_type));
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}
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static ssize_t default_roce_mode_store(struct config_item *item,
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const char *buf, size_t count)
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{
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struct cma_device *cma_dev;
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struct cma_dev_port_group *group;
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int gid_type = ib_cache_gid_parse_type_str(buf);
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ssize_t ret;
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if (gid_type < 0)
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return -EINVAL;
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ret = cma_configfs_params_get(item, &cma_dev, &group);
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if (ret)
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return ret;
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ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type);
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cma_configfs_params_put(cma_dev);
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return !ret ? strnlen(buf, count) : ret;
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}
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CONFIGFS_ATTR(, default_roce_mode);
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static ssize_t default_roce_tos_show(struct config_item *item, char *buf)
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{
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struct cma_device *cma_dev;
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struct cma_dev_port_group *group;
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ssize_t ret;
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u8 tos;
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ret = cma_configfs_params_get(item, &cma_dev, &group);
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if (ret)
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return ret;
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tos = cma_get_default_roce_tos(cma_dev, group->port_num);
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cma_configfs_params_put(cma_dev);
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return sprintf(buf, "%u\n", tos);
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}
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static ssize_t default_roce_tos_store(struct config_item *item,
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const char *buf, size_t count)
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{
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struct cma_device *cma_dev;
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struct cma_dev_port_group *group;
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ssize_t ret;
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u8 tos;
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ret = kstrtou8(buf, 0, &tos);
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if (ret)
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return ret;
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ret = cma_configfs_params_get(item, &cma_dev, &group);
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if (ret)
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return ret;
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ret = cma_set_default_roce_tos(cma_dev, group->port_num, tos);
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cma_configfs_params_put(cma_dev);
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return ret ? ret : strnlen(buf, count);
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}
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CONFIGFS_ATTR(, default_roce_tos);
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static struct configfs_attribute *cma_configfs_attributes[] = {
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&attr_default_roce_mode,
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&attr_default_roce_tos,
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NULL,
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};
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static const struct config_item_type cma_port_group_type = {
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.ct_attrs = cma_configfs_attributes,
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.ct_owner = THIS_MODULE
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};
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static int make_cma_ports(struct cma_dev_group *cma_dev_group,
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struct cma_device *cma_dev)
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{
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struct ib_device *ibdev;
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unsigned int i;
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unsigned int ports_num;
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struct cma_dev_port_group *ports;
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int err;
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ibdev = cma_get_ib_dev(cma_dev);
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if (!ibdev)
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return -ENODEV;
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ports_num = ibdev->phys_port_cnt;
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ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports),
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GFP_KERNEL);
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if (!ports) {
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err = -ENOMEM;
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goto free;
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}
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for (i = 0; i < ports_num; i++) {
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char port_str[10];
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ports[i].port_num = i + 1;
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snprintf(port_str, sizeof(port_str), "%u", i + 1);
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ports[i].cma_dev_group = cma_dev_group;
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config_group_init_type_name(&ports[i].group,
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port_str,
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&cma_port_group_type);
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configfs_add_default_group(&ports[i].group,
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&cma_dev_group->ports_group);
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}
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cma_dev_group->ports = ports;
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return 0;
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free:
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kfree(ports);
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cma_dev_group->ports = NULL;
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return err;
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}
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static void release_cma_dev(struct config_item *item)
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{
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struct config_group *group = container_of(item, struct config_group,
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cg_item);
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struct cma_dev_group *cma_dev_group = container_of(group,
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struct cma_dev_group,
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device_group);
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kfree(cma_dev_group);
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};
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static void release_cma_ports_group(struct config_item *item)
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{
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struct config_group *group = container_of(item, struct config_group,
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cg_item);
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struct cma_dev_group *cma_dev_group = container_of(group,
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struct cma_dev_group,
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ports_group);
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kfree(cma_dev_group->ports);
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cma_dev_group->ports = NULL;
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};
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static struct configfs_item_operations cma_ports_item_ops = {
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.release = release_cma_ports_group
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};
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static const struct config_item_type cma_ports_group_type = {
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.ct_item_ops = &cma_ports_item_ops,
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.ct_owner = THIS_MODULE
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};
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static struct configfs_item_operations cma_device_item_ops = {
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.release = release_cma_dev
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};
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static const struct config_item_type cma_device_group_type = {
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.ct_item_ops = &cma_device_item_ops,
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.ct_owner = THIS_MODULE
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};
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static struct config_group *make_cma_dev(struct config_group *group,
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const char *name)
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{
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int err = -ENODEV;
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struct cma_device *cma_dev = cma_enum_devices_by_ibdev(filter_by_name,
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(void *)name);
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struct cma_dev_group *cma_dev_group = NULL;
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if (!cma_dev)
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goto fail;
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cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL);
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if (!cma_dev_group) {
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err = -ENOMEM;
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goto fail;
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}
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strlcpy(cma_dev_group->name, name, sizeof(cma_dev_group->name));
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config_group_init_type_name(&cma_dev_group->ports_group, "ports",
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&cma_ports_group_type);
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err = make_cma_ports(cma_dev_group, cma_dev);
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if (err)
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goto fail;
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config_group_init_type_name(&cma_dev_group->device_group, name,
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&cma_device_group_type);
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configfs_add_default_group(&cma_dev_group->ports_group,
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&cma_dev_group->device_group);
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cma_deref_dev(cma_dev);
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return &cma_dev_group->device_group;
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fail:
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if (cma_dev)
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cma_deref_dev(cma_dev);
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kfree(cma_dev_group);
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return ERR_PTR(err);
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}
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static struct configfs_group_operations cma_subsys_group_ops = {
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.make_group = make_cma_dev,
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};
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static const struct config_item_type cma_subsys_type = {
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.ct_group_ops = &cma_subsys_group_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct configfs_subsystem cma_subsys = {
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.su_group = {
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.cg_item = {
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.ci_namebuf = "rdma_cm",
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.ci_type = &cma_subsys_type,
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},
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},
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};
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int __init cma_configfs_init(void)
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{
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int ret;
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config_group_init(&cma_subsys.su_group);
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mutex_init(&cma_subsys.su_mutex);
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ret = configfs_register_subsystem(&cma_subsys);
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if (ret)
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mutex_destroy(&cma_subsys.su_mutex);
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return ret;
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}
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void __exit cma_configfs_exit(void)
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{
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configfs_unregister_subsystem(&cma_subsys);
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mutex_destroy(&cma_subsys.su_mutex);
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}
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