static void
ntb_transport_rx(struct ntb_transport_qp *qp)
{
int rc, i;
/*
* Limit the number of packets processed in a single interrupt to
* provide fairness to others
*/
mtx_lock(&qp->transport->rx_lock);
CTR0(KTR_NTB, "RX: transport_rx");
for (i = 0; i < NTB_RX_MAX_PKTS; i++) {
rc = ntb_process_rxc(qp);
if (rc != 0) {
CTR0(KTR_NTB, "RX: process_rxc failed");
break;
}
}
mtx_unlock(&qp->transport->rx_lock);
}
/* Transport Rx */
static void
ntb_transport_rxc_db(void *arg, int pending __unused)
{
struct ntb_transport_qp *qp = arg;
ntb_q_idx_t i;
int rc;
/*
* Limit the number of packets processed in a single interrupt to
* provide fairness to others
*/
CTR0(KTR_NTB, "RX: transport_rx");
mtx_lock(&qp->transport->rx_lock);
for (i = 0; i < qp->rx_max_entry; i++) {
rc = ntb_process_rxc(qp);
if (rc != 0) {
CTR0(KTR_NTB, "RX: process_rxc failed");
break;
}
}
mtx_unlock(&qp->transport->rx_lock);
if (i == qp->rx_max_entry)
taskqueue_enqueue(taskqueue_swi, &qp->rxc_db_work);
else if ((ntb_db_read(qp->ntb) & (1ull << qp->qp_num)) != 0) {
/* If db is set, clear it and read it back to commit clear. */
ntb_db_clear(qp->ntb, 1ull << qp->qp_num);
(void)ntb_db_read(qp->ntb);
/*
* An interrupt may have arrived between finishing
* ntb_process_rxc and clearing the doorbell bit: there might
* be some more work to do.
*/
taskqueue_enqueue(taskqueue_swi, &qp->rxc_db_work);
}
}