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Diffstat (limited to '')
-rw-r--r-- | drivers/infiniband/core/uverbs_std_types_counters.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_counters.c b/drivers/infiniband/core/uverbs_std_types_counters.c new file mode 100644 index 000000000..381aa5797 --- /dev/null +++ b/drivers/infiniband/core/uverbs_std_types_counters.c @@ -0,0 +1,163 @@ +// 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; + + if (atomic_read(&counters->usecnt)) + return -EBUSY; + + 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); + if (IS_ERR(uattr)) + return PTR_ERR(uattr); + 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)), + {} +}; |