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 "iw.h"
39
40 DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_iw_statistics, rds_iw_stats);
41
42 static const char *const rds_iw_stat_names[] = {
43 "iw_connect_raced",
44 "iw_listen_closed_stale",
45 "iw_tx_cq_call",
46 "iw_tx_cq_event",
47 "iw_tx_ring_full",
48 "iw_tx_throttle",
49 "iw_tx_sg_mapping_failure",
50 "iw_tx_stalled",
51 "iw_tx_credit_updates",
52 "iw_rx_cq_call",
53 "iw_rx_cq_event",
54 "iw_rx_ring_empty",
55 "iw_rx_refill_from_cq",
56 "iw_rx_refill_from_thread",
57 "iw_rx_alloc_limit",
58 "iw_rx_credit_updates",
59 "iw_ack_sent",
60 "iw_ack_send_failure",
61 "iw_ack_send_delayed",
62 "iw_ack_send_piggybacked",
63 "iw_ack_received",
64 "iw_rdma_mr_alloc",
65 "iw_rdma_mr_free",
66 "iw_rdma_mr_used",
67 "iw_rdma_mr_pool_flush",
68 "iw_rdma_mr_pool_wait",
69 "iw_rdma_mr_pool_depleted",
70 };
71
rds_iw_stats_info_copy(struct rds_info_iterator * iter,unsigned int avail)72 unsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter,
73 unsigned int avail)
74 {
75 struct rds_iw_statistics stats = {0, };
76 uint64_t *src;
77 uint64_t *sum;
78 size_t i;
79 int cpu;
80
81 if (avail < ARRAY_SIZE(rds_iw_stat_names))
82 goto out;
83
84 for_each_online_cpu(cpu) {
85 src = (uint64_t *)&(per_cpu(rds_iw_stats, cpu));
86 sum = (uint64_t *)&stats;
87 for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
88 *(sum++) += *(src++);
89 }
90
91 rds_stats_info_copy(iter, (uint64_t *)&stats, rds_iw_stat_names,
92 ARRAY_SIZE(rds_iw_stat_names));
93 out:
94 return ARRAY_SIZE(rds_iw_stat_names);
95 }
96