static inline void
usdf_process_nak(struct usdf_ep *ep, uint16_t seq)
{
struct usdf_msg_qe *wqe;
size_t rewind;
/* Ignore NAKs of future packets */
if (RUDP_SEQ_GE(seq, ep->e.msg.ep_next_tx_seq)) {
return;
}
/*
* Move any WQEs that contain NAKed sequences back to the
* posted list. We set ms_resid == 0 here because final set to zero
* is optimized out of the fastpath
*/
while (!TAILQ_EMPTY(&ep->e.msg.ep_sent_wqe)) {
wqe = TAILQ_LAST(&ep->e.msg.ep_sent_wqe, usdf_msg_qe_head);
TAILQ_REMOVE(&ep->e.msg.ep_sent_wqe, wqe, ms_link);
wqe->ms_resid = 0;
TAILQ_INSERT_HEAD(&ep->e.msg.ep_posted_wqe, wqe, ms_link);
}
wqe = TAILQ_FIRST(&ep->e.msg.ep_posted_wqe);
/* reset WQE to old sequence # */
if (wqe->ms_resid == 0) {
rewind = RUDP_SEQ_DIFF(wqe->ms_last_seq, seq) + 1;
} else {
rewind = RUDP_SEQ_DIFF(ep->e.msg.ep_next_tx_seq, seq);
}
if (rewind > 0) {
ep->e.msg.ep_seq_credits = USDF_RUDP_SEQ_CREDITS;
ep->e.msg.ep_next_tx_seq = seq;
usdf_msg_rewind_qe(wqe, rewind,
ep->ep_domain->dom_fabric->fab_dev_attrs->uda_mtu -
sizeof(struct rudp_pkt));
usdf_msg_ep_ready(ep);
}
}
static inline void
usdf_msg_process_ack(struct usdf_ep *ep, uint16_t seq)
{
struct usdf_cq_hard *hcq;
struct usdf_msg_qe *wqe;
struct usdf_tx *tx;
uint16_t max_ack;
unsigned credits;
tx = ep->ep_tx;
/* don't try to ACK what we don't think we've sent */
max_ack = ep->e.msg.ep_next_tx_seq - 1;
if (RUDP_SEQ_GT(seq, max_ack)) {
seq = max_ack;
}
hcq = tx->t.msg.tx_hcq;
while (!TAILQ_EMPTY(&ep->e.msg.ep_sent_wqe)) {
wqe = TAILQ_FIRST(&ep->e.msg.ep_sent_wqe);
if (RUDP_SEQ_LE(wqe->ms_last_seq, seq)) {
TAILQ_REMOVE(&ep->e.msg.ep_sent_wqe, wqe, ms_link);
USDF_DBG_SYS(EP_DATA, "send complete, signal_comp=%u\n", wqe->ms_signal_comp);
if (wqe->ms_signal_comp)
hcq->cqh_post(hcq, wqe->ms_context,
wqe->ms_length, FI_SUCCESS,
FI_MSG | FI_SEND);
usdf_msg_put_tx_wqe(tx, wqe);
} else {
break;
}
}
credits = RUDP_SEQ_DIFF(seq, ep->e.msg.ep_last_rx_ack);
if (ep->e.msg.ep_seq_credits == 0 && credits > 0 &&
!TAILQ_EMPTY(&ep->e.msg.ep_posted_wqe)) {
usdf_msg_ep_ready(ep);
}
ep->e.msg.ep_seq_credits += credits;
ep->e.msg.ep_last_rx_ack = seq;
/* If all ACKed, cancel timer, else reset it */
if (seq == max_ack) {
usdf_timer_cancel(ep->ep_domain->dom_fabric,
ep->e.msg.ep_ack_timer);
} else {
usdf_timer_reset(ep->ep_domain->dom_fabric,
ep->e.msg.ep_ack_timer, USDF_RUDP_ACK_TIMEOUT);
}
}
static inline void
usdf_msg_process_ack(struct usdf_ep *ep, uint16_t seq)
{
struct usdf_cq_hard *hcq;
struct usdf_msg_qe *wqe;
uint16_t max_ack;
unsigned credits;
/* don't try to ACK what we don't think we've sent */
max_ack = ep->e.msg.ep_next_tx_seq - 1;
if (RUDP_SEQ_GT(seq, max_ack)) {
seq = max_ack;
}
hcq = ep->ep_tx->t.msg.tx_hcq;
while (!TAILQ_EMPTY(&ep->e.msg.ep_sent_wqe)) {
wqe = TAILQ_FIRST(&ep->e.msg.ep_sent_wqe);
if (RUDP_SEQ_LE(wqe->ms_last_seq, seq)) {
TAILQ_REMOVE(&ep->e.msg.ep_sent_wqe, wqe, ms_link);
hcq->cqh_post(hcq, wqe->ms_context, wqe->ms_length);
TAILQ_INSERT_HEAD(&ep->ep_tx->t.msg.tx_free_wqe,
wqe, ms_link);
} else {
break;
}
}
credits = RUDP_SEQ_DIFF(seq, ep->e.msg.ep_last_rx_ack);
if (ep->e.msg.ep_seq_credits == 0 && credits > 0 &&
!TAILQ_EMPTY(&ep->e.msg.ep_posted_wqe)) {
usdf_msg_ep_ready(ep);
}
ep->e.msg.ep_seq_credits += credits;
ep->e.msg.ep_last_rx_ack = seq;
/* If all ACKed, cancel timer, else reset it */
if (seq == max_ack) {
usdf_timer_cancel(ep->ep_domain->dom_fabric,
ep->e.msg.ep_ack_timer);
} else {
usdf_timer_reset(ep->ep_domain->dom_fabric,
ep->e.msg.ep_ack_timer, USDF_RUDP_ACK_TIMEOUT);
}
}
