Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[linux-2.6.git] / net / rds / ib_stats.c
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
40 DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);
41
42 static 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
74 unsigned 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));
95 out:
96         return ARRAY_SIZE(rds_ib_stat_names);
97 }