1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
5 * This software is available to you under a choice of one of two
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7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include "rdma_core.h"
36 #include <rdma/uverbs_std_types.h>
38 static int uverbs_free_counters(struct ib_uobject *uobject,
39 enum rdma_remove_reason why,
40 struct uverbs_attr_bundle *attrs)
42 struct ib_counters *counters = uobject->object;
45 ret = ib_destroy_usecnt(&counters->usecnt, why, uobject);
49 ret = counters->device->ops.destroy_counters(counters);
56 static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(
57 struct uverbs_attr_bundle *attrs)
59 struct ib_uobject *uobj = uverbs_attr_get_uobject(
60 attrs, UVERBS_ATTR_CREATE_COUNTERS_HANDLE);
61 struct ib_device *ib_dev = attrs->context->device;
62 struct ib_counters *counters;
66 * This check should be removed once the infrastructure
67 * have the ability to remove methods from parse tree once
68 * such condition is met.
70 if (!ib_dev->ops.create_counters)
73 counters = rdma_zalloc_drv_obj(ib_dev, ib_counters);
77 counters->device = ib_dev;
78 counters->uobject = uobj;
79 uobj->object = counters;
80 atomic_set(&counters->usecnt, 0);
82 ret = ib_dev->ops.create_counters(counters, attrs);
89 static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(
90 struct uverbs_attr_bundle *attrs)
92 struct ib_counters_read_attr read_attr = {};
93 const struct uverbs_attr *uattr;
94 struct ib_counters *counters =
95 uverbs_attr_get_obj(attrs, UVERBS_ATTR_READ_COUNTERS_HANDLE);
98 if (!counters->device->ops.read_counters)
101 if (!atomic_read(&counters->usecnt))
104 ret = uverbs_get_flags32(&read_attr.flags, attrs,
105 UVERBS_ATTR_READ_COUNTERS_FLAGS,
106 IB_UVERBS_READ_COUNTERS_PREFER_CACHED);
110 uattr = uverbs_attr_get(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF);
112 return PTR_ERR(uattr);
113 read_attr.ncounters = uattr->ptr_attr.len / sizeof(u64);
114 read_attr.counters_buff = uverbs_zalloc(
115 attrs, array_size(read_attr.ncounters, sizeof(u64)));
116 if (IS_ERR(read_attr.counters_buff))
117 return PTR_ERR(read_attr.counters_buff);
119 ret = counters->device->ops.read_counters(counters, &read_attr, attrs);
123 return uverbs_copy_to(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF,
124 read_attr.counters_buff,
125 read_attr.ncounters * sizeof(u64));
128 DECLARE_UVERBS_NAMED_METHOD(
129 UVERBS_METHOD_COUNTERS_CREATE,
130 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_COUNTERS_HANDLE,
131 UVERBS_OBJECT_COUNTERS,
135 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
136 UVERBS_METHOD_COUNTERS_DESTROY,
137 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_COUNTERS_HANDLE,
138 UVERBS_OBJECT_COUNTERS,
139 UVERBS_ACCESS_DESTROY,
142 DECLARE_UVERBS_NAMED_METHOD(
143 UVERBS_METHOD_COUNTERS_READ,
144 UVERBS_ATTR_IDR(UVERBS_ATTR_READ_COUNTERS_HANDLE,
145 UVERBS_OBJECT_COUNTERS,
148 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_READ_COUNTERS_BUFF,
149 UVERBS_ATTR_MIN_SIZE(0),
151 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_READ_COUNTERS_FLAGS,
152 enum ib_uverbs_read_counters_flags));
154 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_COUNTERS,
155 UVERBS_TYPE_ALLOC_IDR(uverbs_free_counters),
156 &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_CREATE),
157 &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_DESTROY),
158 &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_READ));
160 const struct uapi_definition uverbs_def_obj_counters[] = {
161 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COUNTERS,
162 UAPI_DEF_OBJ_NEEDS_FN(destroy_counters)),