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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/infiniband/core/cma_configfs.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/infiniband/core/cma_configfs.c')
-rw-r--r-- | drivers/infiniband/core/cma_configfs.c | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/drivers/infiniband/core/cma_configfs.c b/drivers/infiniband/core/cma_configfs.c new file mode 100644 index 0000000000..f2fb2d8a65 --- /dev/null +++ b/drivers/infiniband/core/cma_configfs.c @@ -0,0 +1,366 @@ +/* + * Copyright (c) 2015, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - 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. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/configfs.h> +#include <rdma/ib_verbs.h> +#include <rdma/rdma_cm.h> + +#include "core_priv.h" +#include "cma_priv.h" + +struct cma_device; + +struct cma_dev_group; + +struct cma_dev_port_group { + u32 port_num; + struct cma_dev_group *cma_dev_group; + struct config_group group; +}; + +struct cma_dev_group { + char name[IB_DEVICE_NAME_MAX]; + struct config_group device_group; + struct config_group ports_group; + struct cma_dev_port_group *ports; +}; + +static struct cma_dev_port_group *to_dev_port_group(struct config_item *item) +{ + struct config_group *group; + + if (!item) + return NULL; + + group = container_of(item, struct config_group, cg_item); + return container_of(group, struct cma_dev_port_group, group); +} + +static bool filter_by_name(struct ib_device *ib_dev, void *cookie) +{ + return !strcmp(dev_name(&ib_dev->dev), cookie); +} + +static int cma_configfs_params_get(struct config_item *item, + struct cma_device **pcma_dev, + struct cma_dev_port_group **pgroup) +{ + struct cma_dev_port_group *group = to_dev_port_group(item); + struct cma_device *cma_dev; + + if (!group) + return -ENODEV; + + cma_dev = cma_enum_devices_by_ibdev(filter_by_name, + group->cma_dev_group->name); + if (!cma_dev) + return -ENODEV; + + *pcma_dev = cma_dev; + *pgroup = group; + + return 0; +} + +static void cma_configfs_params_put(struct cma_device *cma_dev) +{ + cma_dev_put(cma_dev); +} + +static ssize_t default_roce_mode_show(struct config_item *item, + char *buf) +{ + struct cma_device *cma_dev; + struct cma_dev_port_group *group; + int gid_type; + ssize_t ret; + + ret = cma_configfs_params_get(item, &cma_dev, &group); + if (ret) + return ret; + + gid_type = cma_get_default_gid_type(cma_dev, group->port_num); + cma_configfs_params_put(cma_dev); + + if (gid_type < 0) + return gid_type; + + return sysfs_emit(buf, "%s\n", ib_cache_gid_type_str(gid_type)); +} + +static ssize_t default_roce_mode_store(struct config_item *item, + const char *buf, size_t count) +{ + struct cma_device *cma_dev; + struct cma_dev_port_group *group; + int gid_type; + ssize_t ret; + + ret = cma_configfs_params_get(item, &cma_dev, &group); + if (ret) + return ret; + + gid_type = ib_cache_gid_parse_type_str(buf); + if (gid_type < 0) { + cma_configfs_params_put(cma_dev); + return -EINVAL; + } + + ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type); + + cma_configfs_params_put(cma_dev); + + return !ret ? strnlen(buf, count) : ret; +} + +CONFIGFS_ATTR(, default_roce_mode); + +static ssize_t default_roce_tos_show(struct config_item *item, char *buf) +{ + struct cma_device *cma_dev; + struct cma_dev_port_group *group; + ssize_t ret; + u8 tos; + + ret = cma_configfs_params_get(item, &cma_dev, &group); + if (ret) + return ret; + + tos = cma_get_default_roce_tos(cma_dev, group->port_num); + cma_configfs_params_put(cma_dev); + + return sysfs_emit(buf, "%u\n", tos); +} + +static ssize_t default_roce_tos_store(struct config_item *item, + const char *buf, size_t count) +{ + struct cma_device *cma_dev; + struct cma_dev_port_group *group; + ssize_t ret; + u8 tos; + + ret = kstrtou8(buf, 0, &tos); + if (ret) + return ret; + + ret = cma_configfs_params_get(item, &cma_dev, &group); + if (ret) + return ret; + + ret = cma_set_default_roce_tos(cma_dev, group->port_num, tos); + cma_configfs_params_put(cma_dev); + + return ret ? ret : strnlen(buf, count); +} + +CONFIGFS_ATTR(, default_roce_tos); + +static struct configfs_attribute *cma_configfs_attributes[] = { + &attr_default_roce_mode, + &attr_default_roce_tos, + NULL, +}; + +static const struct config_item_type cma_port_group_type = { + .ct_attrs = cma_configfs_attributes, + .ct_owner = THIS_MODULE +}; + +static int make_cma_ports(struct cma_dev_group *cma_dev_group, + struct cma_device *cma_dev) +{ + struct cma_dev_port_group *ports; + struct ib_device *ibdev; + u32 ports_num; + u32 i; + + ibdev = cma_get_ib_dev(cma_dev); + + if (!ibdev) + return -ENODEV; + + ports_num = ibdev->phys_port_cnt; + ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports), + GFP_KERNEL); + + if (!ports) + return -ENOMEM; + + for (i = 0; i < ports_num; i++) { + char port_str[11]; + + ports[i].port_num = i + 1; + snprintf(port_str, sizeof(port_str), "%u", i + 1); + ports[i].cma_dev_group = cma_dev_group; + config_group_init_type_name(&ports[i].group, + port_str, + &cma_port_group_type); + configfs_add_default_group(&ports[i].group, + &cma_dev_group->ports_group); + + } + cma_dev_group->ports = ports; + return 0; +} + +static void release_cma_dev(struct config_item *item) +{ + struct config_group *group = container_of(item, struct config_group, + cg_item); + struct cma_dev_group *cma_dev_group = container_of(group, + struct cma_dev_group, + device_group); + + kfree(cma_dev_group); +}; + +static void release_cma_ports_group(struct config_item *item) +{ + struct config_group *group = container_of(item, struct config_group, + cg_item); + struct cma_dev_group *cma_dev_group = container_of(group, + struct cma_dev_group, + ports_group); + + kfree(cma_dev_group->ports); + cma_dev_group->ports = NULL; +}; + +static struct configfs_item_operations cma_ports_item_ops = { + .release = release_cma_ports_group +}; + +static const struct config_item_type cma_ports_group_type = { + .ct_item_ops = &cma_ports_item_ops, + .ct_owner = THIS_MODULE +}; + +static struct configfs_item_operations cma_device_item_ops = { + .release = release_cma_dev +}; + +static const struct config_item_type cma_device_group_type = { + .ct_item_ops = &cma_device_item_ops, + .ct_owner = THIS_MODULE +}; + +static struct config_group *make_cma_dev(struct config_group *group, + const char *name) +{ + int err = -ENODEV; + struct cma_device *cma_dev = cma_enum_devices_by_ibdev(filter_by_name, + (void *)name); + struct cma_dev_group *cma_dev_group = NULL; + + if (!cma_dev) + goto fail; + + cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL); + + if (!cma_dev_group) { + err = -ENOMEM; + goto fail; + } + + strscpy(cma_dev_group->name, name, sizeof(cma_dev_group->name)); + + config_group_init_type_name(&cma_dev_group->ports_group, "ports", + &cma_ports_group_type); + + err = make_cma_ports(cma_dev_group, cma_dev); + if (err) + goto fail; + + config_group_init_type_name(&cma_dev_group->device_group, name, + &cma_device_group_type); + configfs_add_default_group(&cma_dev_group->ports_group, + &cma_dev_group->device_group); + + cma_dev_put(cma_dev); + return &cma_dev_group->device_group; + +fail: + if (cma_dev) + cma_dev_put(cma_dev); + kfree(cma_dev_group); + return ERR_PTR(err); +} + +static void drop_cma_dev(struct config_group *cgroup, struct config_item *item) +{ + struct config_group *group = + container_of(item, struct config_group, cg_item); + struct cma_dev_group *cma_dev_group = + container_of(group, struct cma_dev_group, device_group); + + configfs_remove_default_groups(&cma_dev_group->ports_group); + configfs_remove_default_groups(&cma_dev_group->device_group); + config_item_put(item); +} + +static struct configfs_group_operations cma_subsys_group_ops = { + .make_group = make_cma_dev, + .drop_item = drop_cma_dev, +}; + +static const struct config_item_type cma_subsys_type = { + .ct_group_ops = &cma_subsys_group_ops, + .ct_owner = THIS_MODULE, +}; + +static struct configfs_subsystem cma_subsys = { + .su_group = { + .cg_item = { + .ci_namebuf = "rdma_cm", + .ci_type = &cma_subsys_type, + }, + }, +}; + +int __init cma_configfs_init(void) +{ + int ret; + + config_group_init(&cma_subsys.su_group); + mutex_init(&cma_subsys.su_mutex); + ret = configfs_register_subsystem(&cma_subsys); + if (ret) + mutex_destroy(&cma_subsys.su_mutex); + return ret; +} + +void __exit cma_configfs_exit(void) +{ + configfs_unregister_subsystem(&cma_subsys); + mutex_destroy(&cma_subsys.su_mutex); +} |