1/*
 2 * Copyright (c) 2006 Oracle.  All rights reserved.
 3 *
 4 * This software is available to you under a choice of one of two
 5 * licenses.  You may choose to be licensed under the terms of the GNU
 6 * General Public License (GPL) Version 2, available from the file
 7 * COPYING in the main directory of this source tree, or the
 8 * OpenIB.org BSD license below:
 9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33#include <linux/percpu.h>
34#include <linux/seq_file.h>
35#include <linux/proc_fs.h>
36
37#include "rds.h"
38#include "ib.h"
39
40DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);
41
42static const char *const rds_ib_stat_names[] = {
43	"ib_connect_raced",
44	"ib_listen_closed_stale",
45	"ib_tx_cq_call",
46	"ib_tx_cq_event",
47	"ib_tx_ring_full",
48	"ib_tx_throttle",
49	"ib_tx_sg_mapping_failure",
50	"ib_tx_stalled",
51	"ib_tx_credit_updates",
52	"ib_rx_cq_call",
53	"ib_rx_cq_event",
54	"ib_rx_ring_empty",
55	"ib_rx_refill_from_cq",
56	"ib_rx_refill_from_thread",
57	"ib_rx_alloc_limit",
58	"ib_rx_credit_updates",
59	"ib_ack_sent",
60	"ib_ack_send_failure",
61	"ib_ack_send_delayed",
62	"ib_ack_send_piggybacked",
63	"ib_ack_received",
64	"ib_rdma_mr_alloc",
65	"ib_rdma_mr_free",
66	"ib_rdma_mr_used",
67	"ib_rdma_mr_pool_flush",
68	"ib_rdma_mr_pool_wait",
69	"ib_rdma_mr_pool_depleted",
70	"ib_atomic_cswp",
71	"ib_atomic_fadd",
72};
73
74unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
75				    unsigned int avail)
76{
77	struct rds_ib_statistics stats = {0, };
78	uint64_t *src;
79	uint64_t *sum;
80	size_t i;
81	int cpu;
82
83	if (avail < ARRAY_SIZE(rds_ib_stat_names))
84		goto out;
85
86	for_each_online_cpu(cpu) {
87		src = (uint64_t *)&(per_cpu(rds_ib_stats, cpu));
88		sum = (uint64_t *)&stats;
89		for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
90			*(sum++) += *(src++);
91	}
92
93	rds_stats_info_copy(iter, (uint64_t *)&stats, rds_ib_stat_names,
94			    ARRAY_SIZE(rds_ib_stat_names));
95out:
96	return ARRAY_SIZE(rds_ib_stat_names);
97}