LXR linux/drivers/infiniband/hw/hfi1/exp

   1/*
   2 * Copyright(c) 2017 Intel Corporation.
   3 *
   4 * This file is provided under a dual BSD/GPLv2 license.  When using or
   5 * redistributing this file, you may do so under either license.
   6 *
   7 * GPL LICENSE SUMMARY
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of version 2 of the GNU General Public License as
  11 * published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful, but
  14 * WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 * General Public License for more details.
  17 *
  18 * BSD LICENSE
  19 *
  20 * Redistribution and use in source and binary forms, with or without
  21 * modification, are permitted provided that the following conditions
  22 * are met:
  23 *
  24 *  - Redistributions of source code must retain the above copyright
  25 *    notice, this list of conditions and the following disclaimer.
  26 *  - Redistributions in binary form must reproduce the above copyright
  27 *    notice, this list of conditions and the following disclaimer in
  28 *    the documentation and/or other materials provided with the
  29 *    distribution.
  30 *  - Neither the name of Intel Corporation nor the names of its
  31 *    contributors may be used to endorse or promote products derived
  32 *    from this software without specific prior written permission.
  33 *
  34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45 *
  46 */
  47
  48#include "exp_rcv.h"
  49#include "trace.h"
  50
  51/**
  52 * exp_tid_group_init - initialize exp_tid_set
  53 * @set: the set
  54 */
  55static void hfi1_exp_tid_set_init(struct exp_tid_set *set)
  56{
  57        INIT_LIST_HEAD(&set->list);
  58        set->count = 0;
  59}
  60
  61/**
  62 * hfi1_exp_tid_group_init - initialize rcd expected receive
  63 * @rcd: the rcd
  64 */
  65void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd)
  66{
  67        hfi1_exp_tid_set_init(&rcd->tid_group_list);
  68        hfi1_exp_tid_set_init(&rcd->tid_used_list);
  69        hfi1_exp_tid_set_init(&rcd->tid_full_list);
  70}
  71
  72/**
  73 * alloc_ctxt_rcv_groups - initialize expected receive groups
  74 * @rcd: the context to add the groupings to
  75 */
  76int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd)
  77{
  78        struct hfi1_devdata *dd = rcd->dd;
  79        u32 tidbase;
  80        struct tid_group *grp;
  81        int i;
  82        u32 ngroups;
  83
  84        ngroups = rcd->expected_count / dd->rcv_entries.group_size;
  85        rcd->groups =
  86                kcalloc_node(ngroups, sizeof(*rcd->groups),
  87                             GFP_KERNEL, rcd->numa_id);
  88        if (!rcd->groups)
  89                return -ENOMEM;
  90        tidbase = rcd->expected_base;
  91        for (i = 0; i < ngroups; i++) {
  92                grp = &rcd->groups[i];
  93                grp->size = dd->rcv_entries.group_size;
  94                grp->base = tidbase;
  95                tid_group_add_tail(grp, &rcd->tid_group_list);
  96                tidbase += dd->rcv_entries.group_size;
  97        }
  98
  99        return 0;
 100}
 101
 102/**
 103 * free_ctxt_rcv_groups - free  expected receive groups
 104 * @rcd: the context to free
 105 *
 106 * The routine dismantles the expect receive linked
 107 * list and clears any tids associated with the receive
 108 * context.
 109 *
 110 * This should only be called for kernel contexts and the
 111 * a base user context.
 112 */
 113void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd)
 114{
 115        kfree(rcd->groups);
 116        rcd->groups = NULL;
 117        hfi1_exp_tid_group_init(rcd);
 118
 119        hfi1_clear_tids(rcd);
 120}
 121