/*
   * 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 "ib.h"

  DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);

  static const char *const rds_ib_stat_names[] = {

  	"ib_connect_raced",
  	"ib_listen_closed_stale",

  	"s_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_8k_alloc",
  	"ib_rdma_mr_8k_free",
  	"ib_rdma_mr_8k_used",
  	"ib_rdma_mr_8k_pool_flush",
  	"ib_rdma_mr_8k_pool_wait",
  	"ib_rdma_mr_8k_pool_depleted",
  	"ib_rdma_mr_1m_alloc",
  	"ib_rdma_mr_1m_free",
  	"ib_rdma_mr_1m_used",
  	"ib_rdma_mr_1m_pool_flush",
  	"ib_rdma_mr_1m_pool_wait",
  	"ib_rdma_mr_1m_pool_depleted",

  	"ib_rdma_mr_8k_reused",
  	"ib_rdma_mr_1m_reused",

  	"ib_atomic_cswp",
  	"ib_atomic_fadd",

  };
  
  unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
  				    unsigned int avail)
  {
  	struct rds_ib_statistics stats = {0, };
  	uint64_t *src;
  	uint64_t *sum;
  	size_t i;
  	int cpu;
  
  	if (avail < ARRAY_SIZE(rds_ib_stat_names))
  		goto out;
  
  	for_each_online_cpu(cpu) {
  		src = (uint64_t *)&(per_cpu(rds_ib_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_ib_stat_names,
  			    ARRAY_SIZE(rds_ib_stat_names));
  out:
  	return ARRAY_SIZE(rds_ib_stat_names);
  }