1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
2 /*
3 * Copyright (c) 2004-2011 The Trustees of Indiana University and Indiana
4 * University Research and Technology
5 * Corporation. All rights reserved.
6 * Copyright (c) 2004-2009 The University of Tennessee and The University
7 * of Tennessee Research Foundation. All rights
8 * reserved.
9 * Copyright (c) 2004-2007 High Performance Computing Center Stuttgart,
10 * University of Stuttgart. All rights reserved.
11 * Copyright (c) 2004-2005 The Regents of the University of California.
12 * All rights reserved.
13 * Copyright (c) 2006-2007 Voltaire. All rights reserved.
14 * Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
15 * Copyright (c) 2010-2014 Los Alamos National Security, LLC. All rights
16 * reserved.
17 * $COPYRIGHT$
18 *
19 * Additional copyrights may follow
20 *
21 * $HEADER$
22 */
23
24 #include "opal_config.h"
25
26 #include "btl_vader.h"
27 #include "btl_vader_frag.h"
28 #include "btl_vader_fifo.h"
29 #include "btl_vader_fbox.h"
30
31 /**
32 * Initiate a send to the peer.
33 *
34 * @param btl (IN) BTL module
35 * @param peer (IN) BTL peer addressing
36 */
37 int mca_btl_vader_send (struct mca_btl_base_module_t *btl,
38 struct mca_btl_base_endpoint_t *endpoint,
39 struct mca_btl_base_descriptor_t *descriptor,
40 mca_btl_base_tag_t tag)
41 {
42 mca_btl_vader_frag_t *frag = (mca_btl_vader_frag_t *) descriptor;
43 const size_t total_size = frag->segments[0].seg_len;
44
45 /* in order to work around a long standing ob1 bug (see #3845) we have to always
46 * make the callback. once this is fixed in ob1 we can restore the code below. */
47 frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
48
49 /* header (+ optional inline data) */
50 frag->hdr->len = total_size;
51 /* type of message, pt-2-pt, one-sided, etc */
52 frag->hdr->tag = tag;
53
54 /* post the relative address of the descriptor into the peer's fifo */
55 if (opal_list_get_size (&endpoint->pending_frags) || !vader_fifo_write_ep (frag->hdr, endpoint)) {
56 frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
57 OPAL_THREAD_LOCK(&endpoint->pending_frags_lock);
58 opal_list_append (&endpoint->pending_frags, (opal_list_item_t *) frag);
59 if (!endpoint->waiting) {
60 OPAL_THREAD_LOCK(&mca_btl_vader_component.lock);
61 opal_list_append (&mca_btl_vader_component.pending_endpoints, &endpoint->super);
62 OPAL_THREAD_UNLOCK(&mca_btl_vader_component.lock);
63 endpoint->waiting = true;
64 }
65 OPAL_THREAD_UNLOCK(&endpoint->pending_frags_lock);
66 return OPAL_SUCCESS;
67 }
68
69 return OPAL_SUCCESS;
70
71 #if 0
72 if ((frag->hdr->flags & MCA_BTL_VADER_FLAG_SINGLE_COPY) ||
73 !(frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP)) {
74 frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
75
76 return OPAL_SUCCESS;
77 }
78
79 /* data is gone (from the pml's perspective). frag callback/release will
80 happen later */
81 return 1;
82 #endif
83 }