drivers/infiniband/hw/hfi1/exp_rcv.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright(c) 2017 Intel Corporation.
   4  */
   5
   6 #include "exp_rcv.h"
   7 #include "trace.h"
   8
   9 /**
  10  * hfi1_exp_tid_set_init - initialize exp_tid_set
  11  * @set: the set
  12  */
  13 static void hfi1_exp_tid_set_init(struct exp_tid_set *set)
  14 {
  15         INIT_LIST_HEAD(&set->list);
  16         set->count = 0;
  17 }
  18
  19 /**
  20  * hfi1_exp_tid_group_init - initialize rcd expected receive
  21  * @rcd: the rcd
  22  */
  23 void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd)
  24 {
  25         hfi1_exp_tid_set_init(&rcd->tid_group_list);
  26         hfi1_exp_tid_set_init(&rcd->tid_used_list);
  27         hfi1_exp_tid_set_init(&rcd->tid_full_list);
  28 }
  29
  30 /**
  31  * hfi1_alloc_ctxt_rcv_groups - initialize expected receive groups
  32  * @rcd: the context to add the groupings to
  33  */
  34 int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd)
  35 {
  36         struct hfi1_devdata *dd = rcd->dd;
  37         u32 tidbase;
  38         struct tid_group *grp;
  39         int i;
  40         u32 ngroups;
  41
  42         ngroups = rcd->expected_count / dd->rcv_entries.group_size;
  43         rcd->groups =
  44                 kcalloc_node(ngroups, sizeof(*rcd->groups),
  45                              GFP_KERNEL, rcd->numa_id);
  46         if (!rcd->groups)
  47                 return -ENOMEM;
  48         tidbase = rcd->expected_base;
  49         for (i = 0; i < ngroups; i++) {
  50                 grp = &rcd->groups[i];
  51                 grp->size = dd->rcv_entries.group_size;
  52                 grp->base = tidbase;
  53                 tid_group_add_tail(grp, &rcd->tid_group_list);
  54                 tidbase += dd->rcv_entries.group_size;
  55         }
  56
  57         return 0;
  58 }
  59
  60 /**
  61  * hfi1_free_ctxt_rcv_groups - free  expected receive groups
  62  * @rcd: the context to free
  63  *
  64  * The routine dismantles the expect receive linked
  65  * list and clears any tids associated with the receive
  66  * context.
  67  *
  68  * This should only be called for kernel contexts and the
  69  * a base user context.
  70  */
  71 void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd)
  72 {
  73         kfree(rcd->groups);
  74         rcd->groups = NULL;
  75         hfi1_exp_tid_group_init(rcd);
  76
  77         hfi1_clear_tids(rcd);
  78 }