void
sdp_tx_ring_destroy(struct sdp_sock *ssk)
{
sdp_dbg(ssk->socket, "tx ring destroy\n");
SDP_WLOCK(ssk);
callout_stop(&ssk->tx_ring.timer);
callout_stop(&ssk->nagle_timer);
SDP_WUNLOCK(ssk);
callout_drain(&ssk->tx_ring.timer);
callout_drain(&ssk->nagle_timer);
if (ssk->tx_ring.buffer) {
sdp_tx_ring_purge(ssk);
kfree(ssk->tx_ring.buffer);
ssk->tx_ring.buffer = NULL;
}
if (ssk->tx_ring.cq) {
if (ib_destroy_cq(ssk->tx_ring.cq)) {
sdp_warn(ssk->socket, "destroy cq(%p) failed\n",
ssk->tx_ring.cq);
} else {
ssk->tx_ring.cq = NULL;
}
}
WARN_ON(ring_head(ssk->tx_ring) != ring_tail(ssk->tx_ring));
}
static void
sdp_rx_comp_work(struct work_struct *work)
{
struct sdp_sock *ssk = container_of(work, struct sdp_sock,
rx_comp_work);
sdp_prf(ssk->socket, NULL, "%s", __func__);
SDP_WLOCK(ssk);
if (unlikely(!ssk->qp)) {
sdp_prf(ssk->socket, NULL, "qp was destroyed");
goto out;
}
if (unlikely(!ssk->rx_ring.cq)) {
sdp_prf(ssk->socket, NULL, "rx_ring.cq is NULL");
goto out;
}
if (unlikely(!ssk->poll_cq)) {
struct rdma_cm_id *id = ssk->id;
if (id && id->qp)
rdma_notify(id, IB_EVENT_COMM_EST);
goto out;
}
sdp_do_posts(ssk);
out:
SDP_WUNLOCK(ssk);
}
/* Like tcp_fin - called when SDP_MID_DISCONNECT is received */
static void
sdp_handle_disconn(struct sdp_sock *ssk)
{
sdp_dbg(ssk->socket, "%s\n", __func__);
SDP_WLOCK_ASSERT(ssk);
if (TCPS_HAVERCVDFIN(ssk->state) == 0)
socantrcvmore(ssk->socket);
switch (ssk->state) {
case TCPS_SYN_RECEIVED:
case TCPS_ESTABLISHED:
ssk->state = TCPS_CLOSE_WAIT;
break;
case TCPS_FIN_WAIT_1:
/* Received a reply FIN - start Infiniband tear down */
sdp_dbg(ssk->socket,
"%s: Starting Infiniband tear down sending DREQ\n",
__func__);
sdp_cancel_dreq_wait_timeout(ssk);
ssk->qp_active = 0;
if (ssk->id) {
struct rdma_cm_id *id;
id = ssk->id;
SDP_WUNLOCK(ssk);
rdma_disconnect(id);
SDP_WLOCK(ssk);
} else {
sdp_warn(ssk->socket,
"%s: ssk->id is NULL\n", __func__);
return;
}
break;
case TCPS_TIME_WAIT:
/* This is a mutual close situation and we've got the DREQ from
the peer before the SDP_MID_DISCONNECT */
break;
case TCPS_CLOSED:
/* FIN arrived after IB teardown started - do nothing */
sdp_dbg(ssk->socket, "%s: fin in state %s\n",
__func__, sdp_state_str(ssk->state));
return;
default:
sdp_warn(ssk->socket,
"%s: FIN in unexpected state. state=%d\n",
__func__, ssk->state);
break;
}
}
static void
sdp_tx_irq(struct ib_cq *cq, void *cq_context)
{
struct sdp_sock *ssk;
ssk = cq_context;
sdp_prf1(ssk->socket, NULL, "tx irq");
sdp_dbg_data(ssk->socket, "Got tx comp interrupt\n");
SDPSTATS_COUNTER_INC(tx_int_count);
SDP_WLOCK(ssk);
sdp_poll_tx(ssk);
SDP_WUNLOCK(ssk);
}