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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011-2017 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2011 UT-Battelle, LLC. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "btl_ugni_smsg.h"
#include "btl_ugni_rdma.h"
static void mca_btl_ugni_smsg_mbox_construct(mca_btl_ugni_smsg_mbox_t *mbox)
{
struct mca_btl_ugni_reg_t *ugni_reg = (struct mca_btl_ugni_reg_t *) mbox->super.registration;
mca_rcache_base_registration_t *base_reg = (mca_rcache_base_registration_t *) ugni_reg;
/* initialize mailbox attributes */
mbox->attr.smsg_attr.msg_type = GNI_SMSG_TYPE_MBOX_AUTO_RETRANSMIT;
mbox->attr.smsg_attr.msg_maxsize = mca_btl_ugni_component.ugni_smsg_limit;
mbox->attr.smsg_attr.mbox_maxcredit = mca_btl_ugni_component.smsg_max_credits;
mbox->attr.smsg_attr.mbox_offset = (uintptr_t) mbox->super.ptr - (uintptr_t) base_reg->base;
mbox->attr.smsg_attr.msg_buffer = base_reg->base;
mbox->attr.smsg_attr.buff_size = mca_btl_ugni_component.smsg_mbox_size;
mbox->attr.smsg_attr.mem_hndl = ugni_reg->handle.gni_handle;
mbox->attr.proc_name = OPAL_PROC_MY_NAME;
mbox->attr.rmt_irq_mem_hndl = mca_btl_ugni_component.modules[0].devices[0].smsg_irq_mhndl;
}
OBJ_CLASS_INSTANCE(mca_btl_ugni_smsg_mbox_t, opal_free_list_item_t,
mca_btl_ugni_smsg_mbox_construct, NULL);
int mca_btl_ugni_smsg_init(mca_btl_ugni_module_t *ugni_module)
{
gni_return_t rc;
for (int i = 0; i < mca_btl_ugni_component.virtual_device_count; ++i) {
rc = GNI_SmsgSetMaxRetrans(ugni_module->devices[i].dev_handle,
mca_btl_ugni_component.smsg_max_retries);
if (GNI_RC_SUCCESS != rc) {
BTL_ERROR(("error setting maximum SMSG retries %s", gni_err_str[rc]));
return mca_btl_rc_ugni_to_opal(rc);
}
}
return OPAL_SUCCESS;
}
/* progress */
int mca_btl_ugni_smsg_process(mca_btl_base_endpoint_t *ep)
{
mca_btl_ugni_module_t *ugni_module = mca_btl_ugni_ep_btl(ep);
mca_btl_active_message_callback_t *reg;
mca_btl_ugni_base_frag_t frag;
bool disconnect = false;
int32_t _tmp_value = 0;
uintptr_t data_ptr;
gni_return_t rc;
uint32_t len;
int count = 0;
if (!opal_atomic_compare_exchange_strong_32(&ep->smsg_progressing, &_tmp_value, 1)) {
/* already progressing (we can't support reentry here) */
return 0;
}
/* per uGNI documentation we loop until the mailbox is empty */
do {
uint8_t tag = GNI_SMSG_ANY_TAG;
rc = mca_btl_ugni_smsg_get_next_wtag(&ep->smsg_ep_handle, &data_ptr, &tag);
if (GNI_RC_SUCCESS != rc) {
if (OPAL_LIKELY(GNI_RC_NOT_DONE == rc)) {
BTL_VERBOSE(("no smsg message waiting. rc = %s", gni_err_str[rc]));
ep->smsg_progressing = 0;
return count;
}
BTL_ERROR(("unhandled GNI_SmsgGetNextWTag error"));
return OPAL_ERROR;
}
assert(0 != data_ptr);
count++;
BTL_VERBOSE(("got smsg fragment. tag = %d\n", tag));
switch (tag) {
case MCA_BTL_UGNI_TAG_SEND:
frag.hdr.send = ((mca_btl_ugni_send_frag_hdr_t *) data_ptr)[0];
tag = frag.hdr.send.lag >> 24;
len = frag.hdr.send.lag & 0x00ffffff;
BTL_VERBOSE(("received smsg fragment. hdr = {len = %u, tag = %d}", len, tag));
reg = mca_btl_base_active_message_trigger + tag;
mca_btl_base_segment_t seg
= {.seg_addr.pval = (void *) ((uintptr_t) data_ptr
+ sizeof(mca_btl_ugni_send_frag_hdr_t)),
seg.seg_len = len};
const mca_btl_base_receive_descriptor_t desc = {.endpoint = ep,
.des_segments = &seg,
.des_segment_count = 1,
.tag = tag,
.cbdata = reg->cbdata};
reg->cbfunc(&ugni_module->super, &desc);
break;
case MCA_BTL_UGNI_TAG_GET_INIT:
frag.hdr.eager_ex = ((mca_btl_ugni_eager_ex_frag_hdr_t *) data_ptr)[0];
mca_btl_ugni_start_eager_get(ep, frag.hdr.eager_ex, NULL);
break;
case MCA_BTL_UGNI_TAG_RDMA_COMPLETE:
frag.hdr.rdma = ((mca_btl_ugni_rdma_frag_hdr_t *) data_ptr)[0];
if (((mca_btl_ugni_base_frag_t *) frag.hdr.rdma.ctx)->flags
& MCA_BTL_UGNI_FRAG_SMSG_COMPLETE) {
mca_btl_ugni_frag_complete(frag.hdr.rdma.ctx, OPAL_SUCCESS);
} else {
/* let the local smsg completion finish this frag */
((mca_btl_ugni_base_frag_t *) frag.hdr.rdma.ctx)->flags
&= ~MCA_BTL_UGNI_FRAG_IGNORE;
}
break;
case MCA_BTL_UGNI_TAG_DISCONNECT:
/* remote endpoint has disconnected */
disconnect = true;
break;
default:
BTL_ERROR(("unknown tag %d\n", tag));
break;
}
rc = mca_btl_ugni_smsg_release(&ep->smsg_ep_handle);
if (OPAL_UNLIKELY(GNI_RC_SUCCESS != rc)) {
BTL_ERROR(("Smsg release failed! rc = %d", rc));
return OPAL_ERROR;
}
} while (!disconnect);
ep->smsg_progressing = 0;
/* disconnect if we get here */
opal_mutex_lock(&ep->lock);
mca_btl_ugni_ep_disconnect(ep, false);
opal_mutex_unlock(&ep->lock);
return count;
}
static inline int mca_btl_ugni_handle_remote_smsg_overrun(mca_btl_ugni_module_t *btl)
{
size_t endpoint_count;
unsigned int ep_index;
int count, rc;
BTL_VERBOSE(("btl/ugni_component detected SMSG CQ overrun. "
"processing message backlog..."));
/* we don't know which endpoint lost an smsg completion. clear the
smsg remote cq and check all mailboxes */
/* clear out remote cq */
mca_btl_ugni_cq_clear(btl->devices, btl->smsg_remote_cq);
endpoint_count = opal_pointer_array_get_size(&btl->endpoints);
for (ep_index = 0, count = 0; ep_index < endpoint_count; ++ep_index) {
mca_btl_base_endpoint_t *ep;
ep = (mca_btl_base_endpoint_t *) opal_pointer_array_get_item(&btl->endpoints, ep_index);
if (NULL == ep || MCA_BTL_UGNI_EP_STATE_CONNECTED != ep->state) {
continue;
}
/* clear out smsg mailbox */
rc = mca_btl_ugni_smsg_process(ep);
if (OPAL_LIKELY(rc >= 0)) {
count += rc;
}
}
return count;
}
int mca_btl_ugni_progress_remote_smsg(mca_btl_ugni_module_t *btl)
{
mca_btl_base_endpoint_t *ep;
gni_cq_entry_t event_data;
gni_return_t grc;
uint64_t inst_id;
grc = mca_btl_ugni_gni_cq_get_event(btl->devices, btl->smsg_remote_cq, &event_data);
if (GNI_RC_NOT_DONE == grc) {
return 0;
}
if (OPAL_UNLIKELY(GNI_RC_SUCCESS != grc || !GNI_CQ_STATUS_OK(event_data)
|| GNI_CQ_OVERRUN(event_data))) {
if (GNI_RC_ERROR_RESOURCE == grc || (GNI_RC_SUCCESS == grc && GNI_CQ_OVERRUN(event_data))) {
/* recover from smsg cq overrun */
return mca_btl_ugni_handle_remote_smsg_overrun(btl);
}
BTL_ERROR(("unhandled error in GNI_CqGetEvent"));
/* unhandled error: crash */
assert(0);
return mca_btl_rc_ugni_to_opal(grc);
}
BTL_VERBOSE(("REMOTE CQ: Got event 0x%" PRIx64 ". msg id = %" PRIu64
". ok = %d, type = %" PRIu64,
(uint64_t) event_data, GNI_CQ_GET_INST_ID(event_data),
GNI_CQ_STATUS_OK(event_data), GNI_CQ_GET_TYPE(event_data)));
inst_id = GNI_CQ_GET_INST_ID(event_data);
ep = (mca_btl_base_endpoint_t *) opal_pointer_array_get_item(&btl->endpoints, inst_id);
if (OPAL_UNLIKELY(MCA_BTL_UGNI_EP_STATE_CONNECTED != ep->state)) {
/* due to the nature of datagrams we may get a smsg completion before
we get mailbox info from the peer */
BTL_VERBOSE(("event occurred on an unconnected endpoint! ep state = %d", ep->state));
return 0;
}
return mca_btl_ugni_smsg_process(ep);
}
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