diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/exp_rcv.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/exp_rcv.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/exp_rcv.c b/drivers/infiniband/hw/hfi1/exp_rcv.c new file mode 100644 index 000000000000..08d13ed1b574 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/exp_rcv.c @@ -0,0 +1,118 @@ +/* + * Copyright(c) 2017 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * 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. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "exp_rcv.h" +#include "trace.h" + +/** + * exp_tid_group_init - initialize exp_tid_set + * @set - the set + */ +void hfi1_exp_tid_group_init(struct exp_tid_set *set) +{ + INIT_LIST_HEAD(&set->list); + set->count = 0; +} + +/** + * alloc_ctxt_rcv_groups - initialize expected receive groups + * @rcd - the context to add the groupings to + */ +int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd) +{ + struct hfi1_devdata *dd = rcd->dd; + u32 tidbase; + struct tid_group *grp; + int i; + + hfi1_exp_tid_group_init(&rcd->tid_group_list); + hfi1_exp_tid_group_init(&rcd->tid_used_list); + hfi1_exp_tid_group_init(&rcd->tid_full_list); + + tidbase = rcd->expected_base; + for (i = 0; i < rcd->expected_count / + dd->rcv_entries.group_size; i++) { + grp = kzalloc(sizeof(*grp), GFP_KERNEL); + if (!grp) + goto bail; + grp->size = dd->rcv_entries.group_size; + grp->base = tidbase; + tid_group_add_tail(grp, &rcd->tid_group_list); + tidbase += dd->rcv_entries.group_size; + } + + return 0; +bail: + hfi1_free_ctxt_rcv_groups(rcd); + return -ENOMEM; +} + +/** + * free_ctxt_rcv_groups - free expected receive groups + * @rcd - the context to free + * + * The routine dismantles the expect receive linked + * list and clears any tids associated with the receive + * context. + * + * This should only be called for kernel contexts and the + * a base user context. + */ +void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd) +{ + struct tid_group *grp, *gptr; + + WARN_ON(!EXP_TID_SET_EMPTY(rcd->tid_full_list)); + WARN_ON(!EXP_TID_SET_EMPTY(rcd->tid_used_list)); + + list_for_each_entry_safe(grp, gptr, &rcd->tid_group_list.list, list) { + tid_group_remove(grp, &rcd->tid_group_list); + kfree(grp); + } + + hfi1_clear_tids(rcd); +} |
