drivers/infiniband/sw/rxe/rxe_hw_counters.c

   1 /*
   2  * Copyright (c) 2017 Mellanox Technologies Ltd. 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 "rxe.h"
  34 #include "rxe_hw_counters.h"
  35
  36 static const char * const rxe_counter_name[] = {
  37         [RXE_CNT_SENT_PKTS]           =  "sent_pkts",
  38         [RXE_CNT_RCVD_PKTS]           =  "rcvd_pkts",
  39         [RXE_CNT_DUP_REQ]             =  "duplicate_request",
  40         [RXE_CNT_OUT_OF_SEQ_REQ]      =  "out_of_seq_request",
  41         [RXE_CNT_RCV_RNR]             =  "rcvd_rnr_err",
  42         [RXE_CNT_SND_RNR]             =  "send_rnr_err",
  43         [RXE_CNT_RCV_SEQ_ERR]         =  "rcvd_seq_err",
  44         [RXE_CNT_COMPLETER_SCHED]     =  "ack_deferred",
  45         [RXE_CNT_RETRY_EXCEEDED]      =  "retry_exceeded_err",
  46         [RXE_CNT_RNR_RETRY_EXCEEDED]  =  "retry_rnr_exceeded_err",
  47         [RXE_CNT_COMP_RETRY]          =  "completer_retry_err",
  48         [RXE_CNT_SEND_ERR]            =  "send_err",
  49         [RXE_CNT_LINK_DOWNED]         =  "link_downed",
  50         [RXE_CNT_RDMA_SEND]           =  "rdma_sends",
  51         [RXE_CNT_RDMA_RECV]           =  "rdma_recvs",
  52 };
  53
  54 int rxe_ib_get_hw_stats(struct ib_device *ibdev,
  55                         struct rdma_hw_stats *stats,
  56                         u8 port, int index)
  57 {
  58         struct rxe_dev *dev = to_rdev(ibdev);
  59         unsigned int cnt;
  60
  61         if (!port || !stats)
  62                 return -EINVAL;
  63
  64         for (cnt = 0; cnt  < ARRAY_SIZE(rxe_counter_name); cnt++)
  65                 stats->value[cnt] = atomic64_read(&dev->stats_counters[cnt]);
  66
  67         return ARRAY_SIZE(rxe_counter_name);
  68 }
  69
  70 struct rdma_hw_stats *rxe_ib_alloc_hw_stats(struct ib_device *ibdev,
  71                                             u8 port_num)
  72 {
  73         BUILD_BUG_ON(ARRAY_SIZE(rxe_counter_name) != RXE_NUM_OF_COUNTERS);
  74         /* We support only per port stats */
  75         if (!port_num)
  76                 return NULL;
  77
  78         return rdma_alloc_hw_stats_struct(rxe_counter_name,
  79                                           ARRAY_SIZE(rxe_counter_name),
  80                                           RDMA_HW_STATS_DEFAULT_LIFESPAN);
  81 }