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- // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
- /*
- * Copyright (c) 2018, 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 "rdma_core.h"
- #include "uverbs.h"
- #include <rdma/uverbs_std_types.h>
- static int uverbs_free_counters(struct ib_uobject *uobject,
- enum rdma_remove_reason why,
- struct uverbs_attr_bundle *attrs)
- {
- struct ib_counters *counters = uobject->object;
- int ret;
- ret = ib_destroy_usecnt(&counters->usecnt, why, uobject);
- if (ret)
- return ret;
- ret = counters->device->ops.destroy_counters(counters);
- if (ret)
- return ret;
- kfree(counters);
- return 0;
- }
- static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(
- struct uverbs_attr_bundle *attrs)
- {
- struct ib_uobject *uobj = uverbs_attr_get_uobject(
- attrs, UVERBS_ATTR_CREATE_COUNTERS_HANDLE);
- struct ib_device *ib_dev = attrs->context->device;
- struct ib_counters *counters;
- int ret;
- /*
- * This check should be removed once the infrastructure
- * have the ability to remove methods from parse tree once
- * such condition is met.
- */
- if (!ib_dev->ops.create_counters)
- return -EOPNOTSUPP;
- counters = rdma_zalloc_drv_obj(ib_dev, ib_counters);
- if (!counters)
- return -ENOMEM;
- counters->device = ib_dev;
- counters->uobject = uobj;
- uobj->object = counters;
- atomic_set(&counters->usecnt, 0);
- ret = ib_dev->ops.create_counters(counters, attrs);
- if (ret)
- kfree(counters);
- return ret;
- }
- static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(
- struct uverbs_attr_bundle *attrs)
- {
- struct ib_counters_read_attr read_attr = {};
- const struct uverbs_attr *uattr;
- struct ib_counters *counters =
- uverbs_attr_get_obj(attrs, UVERBS_ATTR_READ_COUNTERS_HANDLE);
- int ret;
- if (!counters->device->ops.read_counters)
- return -EOPNOTSUPP;
- if (!atomic_read(&counters->usecnt))
- return -EINVAL;
- ret = uverbs_get_flags32(&read_attr.flags, attrs,
- UVERBS_ATTR_READ_COUNTERS_FLAGS,
- IB_UVERBS_READ_COUNTERS_PREFER_CACHED);
- if (ret)
- return ret;
- uattr = uverbs_attr_get(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF);
- read_attr.ncounters = uattr->ptr_attr.len / sizeof(u64);
- read_attr.counters_buff = uverbs_zalloc(
- attrs, array_size(read_attr.ncounters, sizeof(u64)));
- if (IS_ERR(read_attr.counters_buff))
- return PTR_ERR(read_attr.counters_buff);
- ret = counters->device->ops.read_counters(counters, &read_attr, attrs);
- if (ret)
- return ret;
- return uverbs_copy_to(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF,
- read_attr.counters_buff,
- read_attr.ncounters * sizeof(u64));
- }
- DECLARE_UVERBS_NAMED_METHOD(
- UVERBS_METHOD_COUNTERS_CREATE,
- UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_COUNTERS_HANDLE,
- UVERBS_OBJECT_COUNTERS,
- UVERBS_ACCESS_NEW,
- UA_MANDATORY));
- DECLARE_UVERBS_NAMED_METHOD_DESTROY(
- UVERBS_METHOD_COUNTERS_DESTROY,
- UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_COUNTERS_HANDLE,
- UVERBS_OBJECT_COUNTERS,
- UVERBS_ACCESS_DESTROY,
- UA_MANDATORY));
- DECLARE_UVERBS_NAMED_METHOD(
- UVERBS_METHOD_COUNTERS_READ,
- UVERBS_ATTR_IDR(UVERBS_ATTR_READ_COUNTERS_HANDLE,
- UVERBS_OBJECT_COUNTERS,
- UVERBS_ACCESS_READ,
- UA_MANDATORY),
- UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_READ_COUNTERS_BUFF,
- UVERBS_ATTR_MIN_SIZE(0),
- UA_MANDATORY),
- UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_READ_COUNTERS_FLAGS,
- enum ib_uverbs_read_counters_flags));
- DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_COUNTERS,
- UVERBS_TYPE_ALLOC_IDR(uverbs_free_counters),
- &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_CREATE),
- &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_DESTROY),
- &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_READ));
- const struct uapi_definition uverbs_def_obj_counters[] = {
- UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COUNTERS,
- UAPI_DEF_OBJ_NEEDS_FN(destroy_counters)),
- {}
- };
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