/**
* Creates a shared transmit context.
*
* @param[in] val value to be sign extended
* @param[in] len length to sign extend the value
* @return FI_SUCCESS if shared tx context successfully created
* @return -FI_EINVAL if invalid arg(s) supplied
* @return -FI_ENOMEM insufficient memory
*/
DIRECT_FN STATIC int gnix_stx_open(struct fid_domain *dom,
struct fi_tx_attr *tx_attr,
struct fid_stx **stx, void *context)
{
int ret = FI_SUCCESS;
struct gnix_fid_domain *domain;
struct gnix_nic *nic;
struct gnix_fid_stx *stx_priv;
struct gnix_nic_attr nic_attr = {0};
GNIX_TRACE(FI_LOG_DOMAIN, "\n");
domain = container_of(dom, struct gnix_fid_domain, domain_fid.fid);
if (domain->domain_fid.fid.fclass != FI_CLASS_DOMAIN) {
ret = -FI_EINVAL;
goto err;
}
stx_priv = calloc(1, sizeof(*stx_priv));
if (!stx_priv) {
ret = -FI_ENOMEM;
goto err;
}
stx_priv->domain = domain;
/*
* we force allocation of a nic to make semantics
* match the intent fi_endpoint man page, provide
* a TX context (aka gnix nic) that can be shared
* explicitly amongst endpoints
*/
nic_attr.must_alloc = true;
ret = gnix_nic_alloc(domain, &nic_attr, &nic);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"_gnix_nic_alloc call returned %d\n",
ret);
goto err;
}
stx_priv->nic = nic;
_gnix_ref_init(&stx_priv->ref_cnt, 1, __stx_destruct);
_gnix_ref_get(stx_priv->domain);
stx_priv->stx_fid.fid.fclass = FI_CLASS_STX_CTX;
stx_priv->stx_fid.fid.context = context;
stx_priv->stx_fid.fid.ops = &gnix_stx_ops;
stx_priv->stx_fid.ops = NULL;
*stx = &stx_priv->stx_fid;
err:
return ret;
}
int gnix_ep_open(struct fid_domain *domain, struct fi_info *info,
struct fid_ep **ep, void *context)
{
int ret = FI_SUCCESS;
struct gnix_fid_domain *domain_priv;
struct gnix_fid_ep *ep_priv;
gnix_hashtable_attr_t gnix_ht_attr;
GNIX_TRACE(FI_LOG_EP_CTRL, "\n");
if ((domain == NULL) || (info == NULL) || (ep == NULL))
return -FI_EINVAL;
if (info->ep_attr->type != FI_EP_RDM)
return -FI_ENOSYS;
domain_priv = container_of(domain, struct gnix_fid_domain, domain_fid);
ep_priv = calloc(1, sizeof *ep_priv);
if (!ep_priv)
return -FI_ENOMEM;
ep_priv->ep_fid.fid.fclass = FI_CLASS_EP;
ep_priv->ep_fid.fid.context = context;
ep_priv->ep_fid.fid.ops = &gnix_ep_fi_ops;
ep_priv->ep_fid.ops = &gnix_ep_ops;
ep_priv->domain = domain_priv;
ep_priv->type = info->ep_attr->type;
fastlock_init(&ep_priv->vc_list_lock);
dlist_init(&ep_priv->wc_vc_list);
atomic_initialize(&ep_priv->active_fab_reqs, 0);
atomic_initialize(&ep_priv->ref_cnt, 0);
fastlock_init(&ep_priv->recv_queue_lock);
slist_init(&ep_priv->unexp_recv_queue);
slist_init(&ep_priv->posted_recv_queue);
slist_init(&ep_priv->pending_recv_comp_queue);
if (info->tx_attr)
ep_priv->op_flags = info->tx_attr->op_flags;
if (info->rx_attr)
ep_priv->op_flags |= info->rx_attr->op_flags;
ret = __fr_freelist_init(ep_priv);
if (ret != FI_SUCCESS) {
GNIX_ERR(FI_LOG_EP_CTRL,
"Error allocating gnix_fab_req freelist (%s)",
fi_strerror(-ret));
goto err1;
}
ep_priv->ep_fid.msg = &gnix_ep_msg_ops;
ep_priv->ep_fid.rma = &gnix_ep_rma_ops;
ep_priv->ep_fid.tagged = &gnix_ep_tagged_ops;
ep_priv->ep_fid.atomic = NULL;
ep_priv->ep_fid.cm = &gnix_cm_ops;
/*
* TODO, initialize vc hash table
*/
if (ep_priv->type == FI_EP_RDM) {
ret = _gnix_cm_nic_alloc(domain_priv,
&ep_priv->cm_nic);
if (ret != FI_SUCCESS)
goto err;
gnix_ht_attr.ht_initial_size = domain_priv->params.ct_init_size;
gnix_ht_attr.ht_maximum_size = domain_priv->params.ct_max_size;
gnix_ht_attr.ht_increase_step = domain_priv->params.ct_step;
gnix_ht_attr.ht_increase_type = GNIX_HT_INCREASE_MULT;
gnix_ht_attr.ht_collision_thresh = 500;
gnix_ht_attr.ht_hash_seed = 0xdeadbeefbeefdead;
gnix_ht_attr.ht_internal_locking = 1;
ep_priv->vc_ht = calloc(1, sizeof(struct gnix_hashtable));
if (ep_priv->vc_ht == NULL)
goto err;
ret = _gnix_ht_init(ep_priv->vc_ht, &gnix_ht_attr);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"gnix_ht_init call returned %d\n",
ret);
goto err;
}
} else {
ep_priv->cm_nic = NULL;
ep_priv->vc = NULL;
}
ep_priv->progress_fn = NULL;
ep_priv->rx_progress_fn = NULL;
ret = gnix_nic_alloc(domain_priv, &ep_priv->nic);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"_gnix_nic_alloc call returned %d\n",
ret);
goto err;
}
/*
* if smsg callbacks not present hook them up now
*/
if (ep_priv->nic->smsg_callbacks == NULL)
ep_priv->nic->smsg_callbacks = gnix_ep_smsg_callbacks;
atomic_inc(&domain_priv->ref_cnt);
*ep = &ep_priv->ep_fid;
return ret;
err1:
__fr_freelist_destroy(ep_priv);
err:
if (ep_priv->vc_ht != NULL) {
_gnix_ht_destroy(ep_priv->vc_ht); /* may not be initialized but
okay */
free(ep_priv->vc_ht);
ep_priv->vc_ht = NULL;
}
if (ep_priv->cm_nic != NULL)
ret = _gnix_cm_nic_free(ep_priv->cm_nic);
free(ep_priv);
return ret;
}
int gnix_ep_open(struct fid_domain *domain, struct fi_info *info,
struct fid_ep **ep, void *context)
{
int ret = FI_SUCCESS;
int tsret = FI_SUCCESS;
uint32_t cdm_id;
struct gnix_fid_domain *domain_priv;
struct gnix_fid_ep *ep_priv;
gnix_hashtable_attr_t gnix_ht_attr;
gnix_ht_key_t *key_ptr;
struct gnix_tag_storage_attr untagged_attr = {
.type = GNIX_TAG_LIST,
.use_src_addr_matching = 1,
};
bool free_list_inited = false;
GNIX_TRACE(FI_LOG_EP_CTRL, "\n");
if ((domain == NULL) || (info == NULL) || (ep == NULL) ||
(info->ep_attr == NULL))
return -FI_EINVAL;
/*
* TODO: need to implement other endpoint types
*/
if (info->ep_attr->type != FI_EP_RDM)
return -FI_ENOSYS;
domain_priv = container_of(domain, struct gnix_fid_domain, domain_fid);
ep_priv = calloc(1, sizeof *ep_priv);
if (!ep_priv)
return -FI_ENOMEM;
/* init untagged storages */
tsret = _gnix_posted_tag_storage_init(
&ep_priv->posted_recv_queue, &untagged_attr);
if (tsret)
return tsret;
tsret = _gnix_unexpected_tag_storage_init(
&ep_priv->unexp_recv_queue, &untagged_attr);
if (tsret)
return tsret;
/* init tagged storages */
tsret = _gnix_posted_tag_storage_init(
&ep_priv->tagged_posted_recv_queue, NULL);
if (tsret)
return tsret;
tsret = _gnix_unexpected_tag_storage_init(
&ep_priv->tagged_unexp_recv_queue, NULL);
if (tsret)
return tsret;
ep_priv->ep_fid.fid.fclass = FI_CLASS_EP;
ep_priv->ep_fid.fid.context = context;
ep_priv->ep_fid.fid.ops = &gnix_ep_fi_ops;
ep_priv->ep_fid.ops = &gnix_ep_ops;
ep_priv->domain = domain_priv;
ep_priv->type = info->ep_attr->type;
_gnix_ref_init(&ep_priv->ref_cnt, 1, __ep_destruct);
fastlock_init(&ep_priv->recv_comp_lock);
fastlock_init(&ep_priv->recv_queue_lock);
fastlock_init(&ep_priv->tagged_queue_lock);
slist_init(&ep_priv->pending_recv_comp_queue);
ep_priv->caps = info->caps & GNIX_EP_RDM_CAPS;
if (info->tx_attr)
ep_priv->op_flags = info->tx_attr->op_flags;
if (info->rx_attr)
ep_priv->op_flags |= info->rx_attr->op_flags;
ep_priv->op_flags &= GNIX_EP_OP_FLAGS;
ep_priv->min_multi_recv = GNIX_OPT_MIN_MULTI_RECV_DEFAULT;
ret = __fr_freelist_init(ep_priv);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"Error allocating gnix_fab_req freelist (%s)",
fi_strerror(-ret));
goto err;
} else
free_list_inited = true;
ep_priv->ep_fid.msg = &gnix_ep_msg_ops;
ep_priv->ep_fid.rma = &gnix_ep_rma_ops;
ep_priv->ep_fid.tagged = &gnix_ep_tagged_ops;
ep_priv->ep_fid.atomic = &gnix_ep_atomic_ops;
ep_priv->ep_fid.cm = &gnix_cm_ops;
if (ep_priv->type == FI_EP_RDM) {
if (info->src_addr != NULL) {
ret = __gnix_ep_bound_prep(domain_priv,
info,
ep_priv);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"__gnix_ep_bound_prep returned error (%s)",
fi_strerror(-ret));
goto err;
}
} else {
fastlock_acquire(&domain_priv->cm_nic_lock);
/*
* if a cm_nic has not yet been allocated for this
* domain, do it now. Reuse the embedded gnix_nic
* in the cm_nic as the nic for this endpoint
* to reduce demand on Aries hw resources.
*/
if (domain_priv->cm_nic == NULL) {
ret = _gnix_cm_nic_alloc(domain_priv,
info,
&domain_priv->cm_nic);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"_gnix_cm_nic_alloc returned %s\n",
fi_strerror(-ret));
fastlock_release(
&domain_priv->cm_nic_lock);
goto err;
}
ep_priv->cm_nic = domain_priv->cm_nic;
ep_priv->nic = ep_priv->cm_nic->nic;
_gnix_ref_get(ep_priv->nic);
} else {
ep_priv->cm_nic = domain_priv->cm_nic;
_gnix_ref_get(ep_priv->cm_nic);
}
fastlock_release(&domain_priv->cm_nic_lock);
ep_priv->my_name.gnix_addr.device_addr =
ep_priv->cm_nic->my_name.gnix_addr.device_addr;
ep_priv->my_name.cm_nic_cdm_id =
ep_priv->cm_nic->my_name.gnix_addr.cdm_id;
ret = _gnix_get_new_cdm_id(domain_priv, &cdm_id);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"gnix_get_new_cdm_id call returned %s\n",
fi_strerror(-ret));
goto err;
}
ep_priv->my_name.gnix_addr.cdm_id = cdm_id;
}
key_ptr = (gnix_ht_key_t *)&ep_priv->my_name.gnix_addr;
ret = _gnix_ht_insert(ep_priv->cm_nic->addr_to_ep_ht,
*key_ptr,
ep_priv);
if ((ret != FI_SUCCESS) && (ret != -FI_ENOSPC)) {
GNIX_WARN(FI_LOG_EP_CTRL,
"__gnix_ht_insert returned %d\n",
ret);
goto err;
}
gnix_ht_attr.ht_initial_size = domain_priv->params.ct_init_size;
gnix_ht_attr.ht_maximum_size = domain_priv->params.ct_max_size;
gnix_ht_attr.ht_increase_step = domain_priv->params.ct_step;
gnix_ht_attr.ht_increase_type = GNIX_HT_INCREASE_MULT;
gnix_ht_attr.ht_collision_thresh = 500;
gnix_ht_attr.ht_hash_seed = 0xdeadbeefbeefdead;
gnix_ht_attr.ht_internal_locking = 0;
gnix_ht_attr.destructor = __gnix_vc_destroy_ht_entry;
ep_priv->vc_ht = calloc(1, sizeof(struct gnix_hashtable));
if (ep_priv->vc_ht == NULL)
goto err;
ret = _gnix_ht_init(ep_priv->vc_ht, &gnix_ht_attr);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"gnix_ht_init call returned %d\n",
ret);
goto err;
}
fastlock_init(&ep_priv->vc_ht_lock);
} else {
ep_priv->cm_nic = NULL;
ep_priv->vc = NULL;
}
ep_priv->progress_fn = NULL;
ep_priv->rx_progress_fn = NULL;
if (ep_priv->nic == NULL) {
ret = gnix_nic_alloc(domain_priv, NULL, &ep_priv->nic);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"_gnix_nic_alloc call returned %d\n",
ret);
goto err;
}
}
/*
* if smsg callbacks not present hook them up now
*/
if (ep_priv->nic->smsg_callbacks == NULL)
ep_priv->nic->smsg_callbacks = gnix_ep_smsg_callbacks;
_gnix_ref_get(ep_priv->domain);
*ep = &ep_priv->ep_fid;
return ret;
err:
if (free_list_inited == true)
__fr_freelist_destroy(ep_priv);
if (ep_priv->vc_ht != NULL) {
_gnix_ht_destroy(ep_priv->vc_ht); /* may not be initialized but
okay */
free(ep_priv->vc_ht);
ep_priv->vc_ht = NULL;
}
if (ep_priv->cm_nic != NULL)
ret = _gnix_cm_nic_free(ep_priv->cm_nic);
if (ep_priv->nic != NULL)
ret = _gnix_nic_free(ep_priv->nic);
free(ep_priv);
return ret;
}
static int __match_context(struct slist_entry *item, const void *arg)
{
struct gnix_fab_req *req;
req = container_of(item, struct gnix_fab_req, slist);
return req->user_context == arg;
}
static inline struct gnix_fab_req *__find_tx_req(
struct gnix_fid_ep *ep,
void *context)
{
struct gnix_fab_req *req = NULL;
struct slist_entry *entry;
struct gnix_vc *vc;
GNIX_HASHTABLE_ITERATOR(ep->vc_ht, iter);
GNIX_DEBUG(FI_LOG_EP_CTRL, "searching VCs for the correct context to"
" cancel, context=%p", context);
fastlock_acquire(&ep->vc_ht_lock);
while ((vc = _gnix_ht_iterator_next(&iter))) {
fastlock_acquire(&vc->tx_queue_lock);
entry = slist_remove_first_match(&vc->tx_queue,
__match_context, context);
fastlock_release(&vc->tx_queue_lock);
if (entry) {
req = container_of(entry, struct gnix_fab_req, slist);
break;
}
}
fastlock_release(&ep->vc_ht_lock);
return req;
}
static inline struct gnix_fab_req *__find_rx_req(
struct gnix_fid_ep *ep,
void *context)
{
struct gnix_fab_req *req = NULL;
fastlock_acquire(&ep->recv_queue_lock);
req = _gnix_remove_req_by_context(&ep->posted_recv_queue, context);
fastlock_release(&ep->recv_queue_lock);
if (req)
return req;
fastlock_acquire(&ep->tagged_queue_lock);
req = _gnix_remove_req_by_context(&ep->tagged_posted_recv_queue,
context);
fastlock_release(&ep->tagged_queue_lock);
return req;
}
static ssize_t gnix_ep_cancel(fid_t fid, void *context)
{
int ret = FI_SUCCESS;
struct gnix_fid_ep *ep;
struct gnix_fab_req *req;
struct gnix_fid_cq *err_cq = NULL;
struct gnix_fid_cntr *err_cntr = NULL;
void *addr;
uint64_t tag, flags;
size_t len;
int is_send = 0;
GNIX_TRACE(FI_LOG_EP_CTRL, "\n");
ep = container_of(fid, struct gnix_fid_ep, ep_fid.fid);
if (!ep->domain)
return -FI_EDOMAIN;
/* without context, we will have to find a request that matches
* a recv or send request. Try the send requests first.
*/
GNIX_INFO(FI_LOG_EP_CTRL, "looking for event to cancel\n");
req = __find_tx_req(ep, context);
if (!req) {
req = __find_rx_req(ep, context);
if (req) {
err_cq = ep->recv_cq;
err_cntr = ep->recv_cntr;
}
} else {
is_send = 1;
err_cq = ep->send_cq;
err_cntr = ep->send_cntr;
}
GNIX_INFO(FI_LOG_EP_CTRL, "finished searching\n");
if (!req)
return -FI_ENOENT;
if (err_cq) {
/* add canceled event */
if (!(req->type == GNIX_FAB_RQ_RDMA_READ ||
req->type == GNIX_FAB_RQ_RDMA_WRITE)) {
if (!is_send) {
addr = (void *) req->msg.recv_addr;
len = req->msg.recv_len;
} else {
addr = (void *) req->msg.send_addr;
len = req->msg.send_len;
}
tag = req->msg.tag;
} else {
/* rma information */
addr = (void *) req->rma.loc_addr;
len = req->rma.len;
tag = 0;
}
flags = req->flags;
_gnix_cq_add_error(err_cq, context, flags, len, addr, 0 /* data */,
tag, len, FI_ECANCELED, FI_ECANCELED, 0);
}
if (err_cntr) {
/* signal increase in cntr errs */
_gnix_cntr_inc_err(err_cntr);
}
_gnix_fr_free(ep, req);
return ret;
}
int _gnix_cm_nic_alloc(struct gnix_fid_domain *domain,
struct fi_info *info,
uint32_t cdm_id,
struct gnix_auth_key *auth_key,
struct gnix_cm_nic **cm_nic_ptr)
{
int ret = FI_SUCCESS;
struct gnix_cm_nic *cm_nic = NULL;
gnix_hashtable_attr_t gnix_ht_attr = {0};
uint32_t name_type = GNIX_EPN_TYPE_UNBOUND;
struct gnix_nic_attr nic_attr = {0};
struct gnix_ep_name ep_name;
struct gnix_dgram_hndl_attr dgram_hndl_attr = {0};
struct gnix_dgram_hndl_attr *dgram_hndl_attr_ptr = NULL;
GNIX_TRACE(FI_LOG_EP_CTRL, "\n");
*cm_nic_ptr = NULL;
/*
* if app has specified a src_addr in the info
* argument and length matches that for gnix_ep_name
* we must allocate a cm_nic, otherwise we first
* check to see if there is a cm_nic already for this domain
* and just use it.
*/
if (info->src_addr) {
/*TODO (optimization): strchr to name_type and strtol */
_gnix_get_ep_name(info->src_addr, 0, &ep_name, domain);
name_type = ep_name.name_type;
}
GNIX_INFO(FI_LOG_EP_CTRL, "creating cm_nic for %u/0x%x/%u\n",
auth_key->ptag, auth_key->cookie, cdm_id);
cm_nic = (struct gnix_cm_nic *)calloc(1, sizeof(*cm_nic));
if (cm_nic == NULL) {
ret = -FI_ENOMEM;
goto err;
}
/*
* we have to force allocation of a new nic since we want
* an a particulard cdm id
*/
nic_attr.must_alloc = true;
nic_attr.use_cdm_id = true;
nic_attr.cdm_id = cdm_id;
nic_attr.auth_key = auth_key;
ret = gnix_nic_alloc(domain, &nic_attr, &cm_nic->nic);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"gnix_nic_alloc returned %s\n",
fi_strerror(-ret));
goto err;
}
cm_nic->my_name.gnix_addr.cdm_id = cdm_id;
cm_nic->ptag = auth_key->ptag;
cm_nic->my_name.cookie = auth_key->cookie;
cm_nic->my_name.gnix_addr.device_addr = cm_nic->nic->device_addr;
cm_nic->domain = domain;
cm_nic->ctrl_progress = domain->control_progress;
cm_nic->my_name.name_type = name_type;
cm_nic->poll_cnt = 0;
fastlock_init(&cm_nic->wq_lock);
dlist_init(&cm_nic->cm_nic_wq);
/*
* prep the cm nic's dgram component
*/
if (domain->control_progress == FI_PROGRESS_AUTO) {
dgram_hndl_attr.timeout_needed = __gnix_cm_nic_timeout_needed;
dgram_hndl_attr.timeout_progress = __gnix_cm_nic_timeout_progress;
dgram_hndl_attr.timeout_data = (void *)cm_nic;
dgram_hndl_attr.timeout = domain->params.dgram_progress_timeout;
dgram_hndl_attr_ptr = &dgram_hndl_attr;
};
ret = _gnix_dgram_hndl_alloc(cm_nic,
domain->control_progress,
dgram_hndl_attr_ptr,
&cm_nic->dgram_hndl);
if (ret != FI_SUCCESS)
goto err;
/*
* allocate hash table for translating ep addresses
* to ep's.
* This table will not be large - how many FI_EP_RDM ep's
* will an app create using one domain?, nor in the critical path
* so just use defaults.
*/
cm_nic->addr_to_ep_ht = calloc(1, sizeof(struct gnix_hashtable));
if (cm_nic->addr_to_ep_ht == NULL)
goto err;
gnix_ht_attr.ht_initial_size = 64;
gnix_ht_attr.ht_maximum_size = 1024;
gnix_ht_attr.ht_increase_step = 2;
gnix_ht_attr.ht_increase_type = GNIX_HT_INCREASE_MULT;
gnix_ht_attr.ht_collision_thresh = 500;
gnix_ht_attr.ht_hash_seed = 0xdeadbeefbeefdead;
gnix_ht_attr.ht_internal_locking = 1;
gnix_ht_attr.destructor = NULL;
ret = _gnix_ht_init(cm_nic->addr_to_ep_ht, &gnix_ht_attr);
if (ret != FI_SUCCESS) {
GNIX_WARN(FI_LOG_EP_CTRL,
"gnix_ht_init returned %s\n",
fi_strerror(-ret));
goto err;
}
_gnix_ref_init(&cm_nic->ref_cnt, 1, __cm_nic_destruct);
*cm_nic_ptr = cm_nic;
pthread_mutex_lock(&gnix_cm_nic_list_lock);
dlist_insert_tail(&cm_nic->cm_nic_list, &gnix_cm_nic_list);
pthread_mutex_unlock(&gnix_cm_nic_list_lock);
return ret;
err:
if (cm_nic->dgram_hndl)
_gnix_dgram_hndl_free(cm_nic->dgram_hndl);
if (cm_nic->nic)
_gnix_nic_free(cm_nic->nic);
if (cm_nic->addr_to_ep_ht) {
_gnix_ht_destroy(cm_nic->addr_to_ep_ht);
free(cm_nic->addr_to_ep_ht);
}
if (cm_nic != NULL)
free(cm_nic);
return ret;
}
static inline void *__gnix_generic_register(
struct gnix_fid_domain *domain,
struct gnix_fid_mem_desc *md,
void *address,
size_t length,
gni_cq_handle_t dst_cq_hndl,
int flags,
int vmdh_index)
{
struct gnix_nic *nic;
gni_return_t grc = GNI_RC_SUCCESS;
int rc;
pthread_mutex_lock(&gnix_nic_list_lock);
/* If the nic list is empty, create a nic */
if (unlikely((dlist_empty(&gnix_nic_list_ptag[domain->ptag])))) {
/* release the lock because we are not checking the list after
this point. Additionally, gnix_nic_alloc takes the
lock to add the nic. */
pthread_mutex_unlock(&gnix_nic_list_lock);
rc = gnix_nic_alloc(domain, NULL, &nic);
if (rc) {
GNIX_INFO(FI_LOG_MR,
"could not allocate nic to do mr_reg,"
" ret=%i\n", rc);
return NULL;
}
} else {
nic = dlist_first_entry(&gnix_nic_list_ptag[domain->ptag],
struct gnix_nic, ptag_nic_list);
if (unlikely(nic == NULL)) {
GNIX_ERR(FI_LOG_MR, "Failed to find nic on "
"ptag list\n");
pthread_mutex_unlock(&gnix_nic_list_lock);
return NULL;
}
_gnix_ref_get(nic);
pthread_mutex_unlock(&gnix_nic_list_lock);
}
COND_ACQUIRE(nic->requires_lock, &nic->lock);
grc = GNI_MemRegister(nic->gni_nic_hndl, (uint64_t) address,
length, dst_cq_hndl, flags,
vmdh_index, &md->mem_hndl);
COND_RELEASE(nic->requires_lock, &nic->lock);
if (unlikely(grc != GNI_RC_SUCCESS)) {
GNIX_INFO(FI_LOG_MR, "failed to register memory with uGNI, "
"ret=%s\n", gni_err_str[grc]);
_gnix_ref_put(nic);
return NULL;
}
/* set up the mem desc */
md->nic = nic;
md->domain = domain;
/* take references on domain */
_gnix_ref_get(md->domain);
return md;
}
