/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * This file contains code imported from the OFED rds source file ib_stats.c
 * Oracle elects to have and use the contents of ib_stats.c under and governed
 * by the OpenIB.org BSD license (see below for full license text). However,
 * the following notice accompanied the original version of this file:
 */

/*
 * 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 <sys/rds.h>

#include <sys/ib/clients/rdsv3/rdsv3.h>
#include <sys/ib/clients/rdsv3/ib.h>
#include <sys/ib/clients/rdsv3/rdsv3_debug.h>

struct rdsv3_ib_statistics      *rdsv3_ib_stats = NULL;

static char *rdsv3_ib_stat_names[] = {
        "ib_connect_raced",
        "ib_listen_closed_stale",
        "ib_evt_handler_call",
        "ib_tasklet_call",
        "ib_tx_cq_event",
        "ib_tx_ring_full",
        "ib_tx_throttle",
        "ib_tx_sg_mapping_failure",
        "ib_tx_stalled",
        "ib_tx_credit_updates",
        "ib_rx_cq_event",
        "ib_rx_ring_empty",
        "ib_rx_refill_from_cq",
        "ib_rx_refill_from_thread",
        "ib_rx_alloc_limit",
        "ib_rx_credit_updates",
        "ib_ack_sent",
        "ib_ack_send_failure",
        "ib_ack_send_delayed",
        "ib_ack_send_piggybacked",
        "ib_ack_received",
        "ib_rdma_mr_alloc",
        "ib_rdma_mr_free",
        "ib_rdma_mr_used",
        "ib_rdma_mr_pool_flush",
        "ib_rdma_mr_pool_wait",
        "ib_rdma_mr_pool_depleted",
};

unsigned int
rdsv3_ib_stats_info_copy(struct rdsv3_info_iterator *iter,
    unsigned int avail)
{
        struct rdsv3_ib_statistics stats = {0, };
        uint64_t *src;
        uint64_t *sum;
        size_t i;
        int cpu;

        RDSV3_DPRINTF4("rdsv3_ib_stats_info_copy", "iter: %p, avail: %d",
            iter, avail);

        if (avail < ARRAY_SIZE(rdsv3_ib_stat_names))
                goto out;

        for (cpu = 0; cpu < nr_cpus; cpu++) {
                src = (uint64_t *)&(rdsv3_per_cpu(rdsv3_ib_stats, cpu));
                sum = (uint64_t *)&stats;
                for (i = 0; i < sizeof (stats) / sizeof (uint64_t); i++)
                        *(sum++) += *(src++);
        }

        rdsv3_stats_info_copy(iter, (uint64_t *)&stats, rdsv3_ib_stat_names,
            ARRAY_SIZE(rdsv3_ib_stat_names));

        RDSV3_DPRINTF4("rdsv3_ib_stats_info_copy",
            "Return: iter: %p, avail: %d", iter, avail);
out:
        return (ARRAY_SIZE(rdsv3_ib_stat_names));
}