drivers/infiniband/hw/hfi1/exp_rcv.c

   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  */
  55 static 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  */
  65 void 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  */
  76 int 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  */
 113 void 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 }