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@@ -0,0 +1,322 @@
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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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+
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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 "core_priv.h"
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+
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+struct cma_device;
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+
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+struct cma_dev_group;
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+
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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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+
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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 config_group *default_dev_group[2];
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+ struct config_group **default_ports_group;
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+ struct cma_dev_port_group *ports;
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+};
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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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+
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+ if (!item)
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+ return NULL;
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+
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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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+
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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(ib_dev->name, cookie);
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+}
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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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+
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+ if (!group)
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+ return -ENODEV;
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+
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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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+
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+ *pcma_dev = cma_dev;
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+ *pgroup = group;
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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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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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+
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+ if (gid_type < 0)
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+ return gid_type;
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+
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+ return sprintf(buf, "%s\n", ib_cache_gid_type_str(gid_type));
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+}
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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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+
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+ if (gid_type < 0)
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+ return -EINVAL;
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+
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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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+
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+ ret = cma_set_default_gid_type(cma_dev, group->port_num, gid_type);
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+
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+ cma_configfs_params_put(cma_dev);
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+
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+ return !ret ? strnlen(buf, count) : ret;
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+}
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+
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+CONFIGFS_ATTR(, default_roce_mode);
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+
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+static struct configfs_attribute *cma_configfs_attributes[] = {
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+ &attr_default_roce_mode,
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+ NULL,
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+};
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+
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+static 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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+
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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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+
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+ ibdev = cma_get_ib_dev(cma_dev);
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+
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+ if (!ibdev)
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+ return -ENODEV;
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+
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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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+
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+ cma_dev_group->default_ports_group = kcalloc(ports_num + 1,
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+ sizeof(*cma_dev_group->ports),
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+ GFP_KERNEL);
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+
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+ if (!ports || !cma_dev_group->default_ports_group) {
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+ err = -ENOMEM;
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+ goto free;
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+ }
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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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+
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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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+ cma_dev_group->default_ports_group[i] = &ports[i].group;
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+ }
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+ cma_dev_group->default_ports_group[i] = NULL;
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+ cma_dev_group->ports = ports;
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+
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+ return 0;
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+free:
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+ kfree(ports);
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+ kfree(cma_dev_group->default_ports_group);
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+ cma_dev_group->ports = NULL;
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+ cma_dev_group->default_ports_group = NULL;
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+ return err;
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+}
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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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+
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+ kfree(cma_dev_group);
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+};
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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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+
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+ kfree(cma_dev_group->ports);
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+ kfree(cma_dev_group->default_ports_group);
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+ cma_dev_group->ports = NULL;
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+ cma_dev_group->default_ports_group = NULL;
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+};
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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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+
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+static 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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+
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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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+
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+static 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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+
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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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+
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+ if (!cma_dev)
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+ goto fail;
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+
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+ cma_dev_group = kzalloc(sizeof(*cma_dev_group), GFP_KERNEL);
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+
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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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+
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+ strncpy(cma_dev_group->name, name, sizeof(cma_dev_group->name));
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+
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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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+
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+ cma_dev_group->ports_group.default_groups =
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+ cma_dev_group->default_ports_group;
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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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+
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+ cma_dev_group->device_group.default_groups
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+ = cma_dev_group->default_dev_group;
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+ cma_dev_group->default_dev_group[0] = &cma_dev_group->ports_group;
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+ cma_dev_group->default_dev_group[1] = NULL;
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+
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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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+
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+ cma_deref_dev(cma_dev);
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+ return &cma_dev_group->device_group;
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+
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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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+
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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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+
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+static 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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+
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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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+
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+int __init cma_configfs_init(void)
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+{
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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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+ return configfs_register_subsystem(&cma_subsys);
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+}
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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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+}
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Matan Barak