/*
* Copyright (c) 2006 Oracle. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/percpu.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include "rds.h"
#include "iw.h"
DEFINE_PER_CPU(struct rds_iw_statistics, rds_iw_stats) ____cacheline_aligned;
static const char *const rds_iw_stat_names[] = {
"iw_connect_raced",
"iw_listen_closed_stale",
"iw_tx_cq_call",
"iw_tx_cq_event",
"iw_tx_ring_full",
"iw_tx_throttle",
"iw_tx_sg_mapping_failure",
"iw_tx_stalled",
"iw_tx_credit_updates",
"iw_rx_cq_call",
"iw_rx_cq_event",
"iw_rx_ring_empty",
"iw_rx_refill_from_cq",
"iw_rx_refill_from_thread",
"iw_rx_alloc_limit",
"iw_rx_credit_updates",
"iw_ack_sent",
"iw_ack_send_failure",
"iw_ack_send_delayed",
"iw_ack_send_piggybacked",
"iw_ack_received",
"iw_rdma_mr_alloc",
"iw_rdma_mr_free",
"iw_rdma_mr_used",
"iw_rdma_mr_pool_flush",
"iw_rdma_mr_pool_wait",
"iw_rdma_mr_pool_depleted",
};
unsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter,
unsigned int avail)
{
struct rds_iw_statistics stats = {0, };
uint64_t *src;
uint64_t *sum;
size_t i;
int cpu;
if (avail < ARRAY_SIZE(rds_iw_stat_names))
goto out;
for_each_online_cpu(cpu) {
src = (uint64_t *)&(per_cpu(rds_iw_stats, cpu));
sum = (uint64_t *)&stats;
for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
*(sum++) += *(src++);
}
rds_stats_info_copy(iter, (uint64_t *)&stats, rds_iw_stat_names,
ARRAY_SIZE(rds_iw_stat_names));
out:
return ARRAY_SIZE(rds_iw_stat_names);
}
