drm/amdgpu/vg20:Restruct uvd to support multiple uvds
[muen/linux.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         "s_ib_evt_handler_call",
46         "ib_tasklet_call",
47         "ib_tx_cq_event",
48         "ib_tx_ring_full",
49         "ib_tx_throttle",
50         "ib_tx_sg_mapping_failure",
51         "ib_tx_stalled",
52         "ib_tx_credit_updates",
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_total_frags",
59         "ib_rx_total_incs",
60         "ib_rx_credit_updates",
61         "ib_ack_sent",
62         "ib_ack_send_failure",
63         "ib_ack_send_delayed",
64         "ib_ack_send_piggybacked",
65         "ib_ack_received",
66         "ib_rdma_mr_8k_alloc",
67         "ib_rdma_mr_8k_free",
68         "ib_rdma_mr_8k_used",
69         "ib_rdma_mr_8k_pool_flush",
70         "ib_rdma_mr_8k_pool_wait",
71         "ib_rdma_mr_8k_pool_depleted",
72         "ib_rdma_mr_1m_alloc",
73         "ib_rdma_mr_1m_free",
74         "ib_rdma_mr_1m_used",
75         "ib_rdma_mr_1m_pool_flush",
76         "ib_rdma_mr_1m_pool_wait",
77         "ib_rdma_mr_1m_pool_depleted",
78         "ib_rdma_mr_8k_reused",
79         "ib_rdma_mr_1m_reused",
80         "ib_atomic_cswp",
81         "ib_atomic_fadd",
82 };
83
84 unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
85                                     unsigned int avail)
86 {
87         struct rds_ib_statistics stats = {0, };
88         uint64_t *src;
89         uint64_t *sum;
90         size_t i;
91         int cpu;
92
93         if (avail < ARRAY_SIZE(rds_ib_stat_names))
94                 goto out;
95
96         for_each_online_cpu(cpu) {
97                 src = (uint64_t *)&(per_cpu(rds_ib_stats, cpu));
98                 sum = (uint64_t *)&stats;
99                 for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
100                         *(sum++) += *(src++);
101         }
102
103         rds_stats_info_copy(iter, (uint64_t *)&stats, rds_ib_stat_names,
104                             ARRAY_SIZE(rds_ib_stat_names));
105 out:
106         return ARRAY_SIZE(rds_ib_stat_names);
107 }