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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* $COPYRIGHT$
* Copyright (c) 2018 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2018 Intel Inc. All rights reserved
* Copyright (c) 2020 Google, LLC. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "btl_ofi_frag.h"
#include "btl_ofi.h"
#include "btl_ofi_endpoint.h"
#include "btl_ofi_rdma.h"
static void mca_btl_ofi_base_frag_constructor(mca_btl_ofi_base_frag_t *frag)
{
/* zero everything out */
memset((char *) frag + sizeof(frag->base), 0, sizeof(*frag) - sizeof(frag->base));
frag->base.des_segments = frag->segments;
frag->base.des_segment_count = 1;
}
static void mca_btl_ofi_base_frag_destructor(mca_btl_ofi_base_frag_t *frag)
{
}
OBJ_CLASS_INSTANCE(mca_btl_ofi_base_frag_t, mca_btl_base_descriptor_t,
mca_btl_ofi_base_frag_constructor, mca_btl_ofi_base_frag_destructor);
OBJ_CLASS_INSTANCE(mca_btl_ofi_frag_completion_t, opal_free_list_item_t, NULL, NULL);
mca_btl_ofi_frag_completion_t *mca_btl_ofi_frag_completion_alloc(mca_btl_base_module_t *btl,
mca_btl_ofi_context_t *context,
mca_btl_ofi_base_frag_t *frag,
int type)
{
mca_btl_ofi_frag_completion_t *comp;
comp = (mca_btl_ofi_frag_completion_t *) opal_free_list_get(&context->frag_comp_list);
comp->base.btl = btl;
comp->base.my_context = context;
comp->base.my_list = &context->frag_comp_list;
comp->base.type = type;
comp->frag = frag;
comp->comp_ctx.comp = comp;
return comp;
}
mca_btl_base_descriptor_t *mca_btl_ofi_alloc(mca_btl_base_module_t *btl,
mca_btl_base_endpoint_t *endpoint, uint8_t order,
size_t size, uint32_t flags)
{
mca_btl_ofi_module_t *ofi_btl = (mca_btl_ofi_module_t *) btl;
mca_btl_ofi_base_frag_t *frag = NULL;
mca_btl_ofi_context_t *context = get_ofi_context(ofi_btl);
frag = mca_btl_ofi_frag_alloc(ofi_btl, &context->frag_list, endpoint);
if (OPAL_LIKELY(frag)) {
frag->segments[0].seg_addr.pval = frag + 1;
frag->segments[0].seg_len = size;
frag->base.des_segment_count = 1;
frag->base.des_segments = &frag->segments[0];
frag->base.des_flags = flags;
frag->base.order = order;
frag->hdr.len = size;
}
return (mca_btl_base_descriptor_t *) frag;
}
int mca_btl_ofi_free(mca_btl_base_module_t *btl, mca_btl_base_descriptor_t *des)
{
/* return the frag to the free list. */
mca_btl_ofi_frag_return((mca_btl_ofi_base_frag_t *) des);
return OPAL_SUCCESS;
}
int mca_btl_ofi_send(mca_btl_base_module_t *btl, mca_btl_base_endpoint_t *endpoint,
mca_btl_base_descriptor_t *descriptor, mca_btl_base_tag_t tag)
{
int rc = 0;
size_t msg_sz;
mca_btl_ofi_context_t *context;
mca_btl_ofi_module_t *ofi_btl = (mca_btl_ofi_module_t *) btl;
mca_btl_ofi_endpoint_t *ofi_ep = (mca_btl_ofi_endpoint_t *) endpoint;
mca_btl_ofi_base_frag_t *frag = (mca_btl_ofi_base_frag_t *) descriptor;
mca_btl_ofi_frag_completion_t *comp;
frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
/* This tag is the active message tag for the remote side */
frag->hdr.tag = tag;
context = get_ofi_context(ofi_btl);
msg_sz = sizeof(mca_btl_ofi_header_t) + frag->hdr.len;
/*
* If supported by the provider and not disabled by
* the btl_ofi_disable_inject MCA parameter,
* try to use the inject path for short messages.
* fi_inject can return -FI_EAGAIN if the provider is
* unable to buffer the message, so one needs to fall
* back to the fi_send path when that error code is
* returned.
*/
if (msg_sz <= mca_btl_ofi_component.max_inject_size &&
false == mca_btl_ofi_component.disable_inject) {
rc = fi_inject(context->tx_ctx, &frag->hdr, msg_sz, ofi_ep->peer_addr);
if (FI_SUCCESS == rc) {
mca_btl_ofi_frag_complete(frag, OPAL_SUCCESS);
return OPAL_SUCCESS;
}
/*
* -FI_EAGAIN is okay but any other error is a problem
*/
if (-FI_EAGAIN != rc) {
return OPAL_ERROR;
}
}
/* create completion context */
comp = mca_btl_ofi_frag_completion_alloc(btl, context, frag, MCA_BTL_OFI_TYPE_SEND);
/* send the frag. Note that we start sending from BTL header + payload
* because we need the other side to have this header information. */
rc = fi_send(context->tx_ctx, &frag->hdr, sizeof(mca_btl_ofi_header_t) + frag->hdr.len, NULL,
ofi_ep->peer_addr, &comp->comp_ctx);
if (OPAL_UNLIKELY(FI_SUCCESS != rc)) {
return OPAL_ERR_OUT_OF_RESOURCE;
}
MCA_BTL_OFI_NUM_SEND_INC(ofi_btl);
return OPAL_SUCCESS;
}
int mca_btl_ofi_recv_frag(mca_btl_ofi_module_t *ofi_btl, mca_btl_base_endpoint_t *endpoint,
mca_btl_ofi_context_t *context, mca_btl_ofi_base_frag_t *frag)
{
int rc;
mca_btl_active_message_callback_t *reg = mca_btl_base_active_message_trigger + frag->hdr.tag;
mca_btl_base_segment_t segment = {.seg_addr.pval = (void *) (frag + 1),
.seg_len = frag->hdr.len};
/* Tell PML where the payload is */
mca_btl_base_receive_descriptor_t recv_desc = {.endpoint = endpoint,
.des_segments = &segment,
.des_segment_count = 1,
.tag = frag->hdr.tag,
.cbdata = reg->cbdata};
/* call the callback */
reg->cbfunc(&ofi_btl->super, &recv_desc);
mca_btl_ofi_frag_complete(frag, OPAL_SUCCESS);
/* repost the recv */
rc = mca_btl_ofi_post_recvs((mca_btl_base_module_t *) ofi_btl, context, 1);
if (OPAL_SUCCESS != rc) {
/* might not be that bad but let's just fail here. */
BTL_ERROR(("failed reposting receive."));
MCA_BTL_OFI_ABORT();
}
return OPAL_SUCCESS;
}
struct mca_btl_base_descriptor_t *mca_btl_ofi_prepare_src(mca_btl_base_module_t *btl,
mca_btl_base_endpoint_t *endpoint,
opal_convertor_t *convertor,
uint8_t order, size_t reserve,
size_t *size, uint32_t flags)
{
struct iovec iov;
size_t length;
uint32_t iov_count = 1;
mca_btl_ofi_base_frag_t *frag;
/* allocate the frag with reserve. */
frag = (mca_btl_ofi_base_frag_t *) mca_btl_ofi_alloc(btl, endpoint, order, reserve, flags);
if (OPAL_UNLIKELY(NULL == frag)) {
return NULL;
}
/* pack the data after the reserve */
iov.iov_len = *size;
iov.iov_base = (IOVBASE_TYPE *) (((unsigned char *) (frag->segments[0].seg_addr.pval))
+ reserve);
opal_convertor_pack(convertor, &iov, &iov_count, &length);
/* pass on frag information */
frag->base.des_segments = frag->segments;
frag->base.des_flags = flags;
frag->base.order = MCA_BTL_NO_ORDER;
frag->segments[0].seg_len += length;
frag->hdr.len += length;
*size = length;
return &frag->base;
}
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