ec33374339
structure This structure member was originally used to specify the remote segment for an RDMA operation. Since the new btl interface no longer uses desriptors for RDMA this member no longer has a purpose. In addition to removing these members the local segment information has been renamed to des_segments/des_segment_count.
184 строки
6.1 KiB
C
184 строки
6.1 KiB
C
/*
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* Copyright (c) 2004-2008 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2011 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006 Sandia National Laboratories. All rights
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* reserved.
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* Copyright (c) 2008-2014 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2012 Los Alamos National Security, LLC. All rights
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* reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include <infiniband/verbs.h>
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#include "opal_stdint.h"
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#include "opal/constants.h"
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#include "opal/mca/btl/btl.h"
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#include "opal/mca/btl/base/base.h"
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#include "opal/mca/common/verbs/common_verbs.h"
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#include "btl_usnic.h"
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#include "btl_usnic_frag.h"
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#include "btl_usnic_util.h"
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#include "btl_usnic_send.h"
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#include "btl_usnic_ack.h"
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/*
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* This function is called when a send of a full-fragment segment completes
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* Return the WQE and also return the segment if no ACK pending
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*/
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void
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opal_btl_usnic_frag_send_complete(opal_btl_usnic_module_t *module,
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opal_btl_usnic_send_segment_t *sseg)
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{
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opal_btl_usnic_send_frag_t *frag;
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frag = sseg->ss_parent_frag;
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/* Reap a frag that was sent */
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--sseg->ss_send_posted;
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--frag->sf_seg_post_cnt;
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/* checks for returnability made inside */
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opal_btl_usnic_send_frag_return_cond(module, frag);
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/* do bookkeeping */
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++frag->sf_endpoint->endpoint_send_credits;
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++module->mod_channels[sseg->ss_channel].sd_wqe;
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/* see if this endpoint needs to be made ready-to-send */
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opal_btl_usnic_check_rts(frag->sf_endpoint);
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}
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/*
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* This function is called when a send segment completes
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* Return the WQE and also return the segment if no ACK pending
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*/
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void
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opal_btl_usnic_chunk_send_complete(opal_btl_usnic_module_t *module,
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opal_btl_usnic_send_segment_t *sseg)
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{
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opal_btl_usnic_send_frag_t *frag;
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frag = sseg->ss_parent_frag;
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/* Reap a frag that was sent */
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--sseg->ss_send_posted;
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--frag->sf_seg_post_cnt;
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if (sseg->ss_send_posted == 0 && !sseg->ss_ack_pending) {
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opal_btl_usnic_release_send_segment(module, frag, sseg);
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}
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/* done with whole fragment? */
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/* checks for returnability made inside */
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opal_btl_usnic_send_frag_return_cond(module, frag);
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/* do bookkeeping */
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++frag->sf_endpoint->endpoint_send_credits;
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++module->mod_channels[sseg->ss_channel].sd_wqe;
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/* see if this endpoint needs to be made ready-to-send */
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opal_btl_usnic_check_rts(frag->sf_endpoint);
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}
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/* Responsible for completing non-fastpath parts of a put or send operation,
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* including initializing any large frag bookkeeping fields and enqueuing the
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* frag on the endpoint.
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*
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* This routine lives in this file to help prevent automatic inlining by the
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* compiler.
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*
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* The "tag" only applies to sends. */
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int
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opal_btl_usnic_finish_put_or_send(
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opal_btl_usnic_module_t *module,
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opal_btl_usnic_endpoint_t *endpoint,
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opal_btl_usnic_send_frag_t *frag,
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mca_btl_base_tag_t tag)
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{
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int rc;
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opal_btl_usnic_small_send_frag_t *sfrag;
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opal_btl_usnic_send_segment_t *sseg;
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/*
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* If this is small, need to do the copyin now.
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* We don't do this earlier in case we got lucky and were
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* able to do an inline send. We did not, so here we are...
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*/
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if (frag->sf_base.uf_type == OPAL_BTL_USNIC_FRAG_SMALL_SEND) {
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sfrag = (opal_btl_usnic_small_send_frag_t *)frag;
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sseg = &sfrag->ssf_segment;
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/* Copy in user data if there is any, collapsing 2 segments into 1.
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* We already packed via the convertor if necessary, so we only need to
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* handle the simple memcpy case here.
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*/
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if (frag->sf_base.uf_base.des_segment_count > 1) {
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/* no convertor */
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assert(NULL != frag->sf_base.uf_local_seg[1].seg_addr.pval);
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memcpy(((char *)(intptr_t)frag->sf_base.uf_local_seg[0].seg_addr.lval +
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frag->sf_base.uf_local_seg[0].seg_len),
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frag->sf_base.uf_local_seg[1].seg_addr.pval,
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frag->sf_base.uf_local_seg[1].seg_len);
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/* update 1st segment length */
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frag->sf_base.uf_base.des_segment_count = 1;
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frag->sf_base.uf_local_seg[0].seg_len +=
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frag->sf_base.uf_local_seg[1].seg_len;
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}
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sseg->ss_base.us_sg_entry[0].length =
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sizeof(opal_btl_usnic_btl_header_t) + frag->sf_size;
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/* use standard channel */
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sseg->ss_channel = USNIC_DATA_CHANNEL;
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sseg->ss_base.us_btl_header->tag = tag;
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if (frag->sf_base.uf_local_seg[0].seg_len < module->tiny_mtu) {
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sseg->ss_send_desc.send_flags |= IBV_SEND_INLINE;
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}
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} else {
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opal_btl_usnic_large_send_frag_t *lfrag;
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/* Save info about the frag so that future invocations of
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* usnic_handle_large_send can generate segments to put on the wire. */
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lfrag = (opal_btl_usnic_large_send_frag_t *)frag;
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lfrag->lsf_tag = tag;
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lfrag->lsf_cur_offset = 0;
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lfrag->lsf_cur_ptr = lfrag->lsf_des_src[0].seg_addr.pval;
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lfrag->lsf_cur_sge = 0;
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lfrag->lsf_bytes_left_in_sge = lfrag->lsf_des_src[0].seg_len;
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lfrag->lsf_bytes_left = frag->sf_size;
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if (lfrag->lsf_pack_on_the_fly) {
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lfrag->lsf_pack_bytes_left = frag->sf_size;
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} else {
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/* we pre-packed the convertor into a chain in prepare_src */
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lfrag->lsf_pack_bytes_left = 0;
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}
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}
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/* queue this fragment into the send engine */
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rc = opal_btl_usnic_endpoint_enqueue_frag(endpoint, frag);
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return rc;
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}
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