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_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 
rds_ib_stats_info_copy(struct rds_info_iterator * iter,unsigned int avail)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 }
108