static void pp_pong(struct pp_ctx *pp)
{
u32 msg_data = -1, spad_data = -1;
int pidx = 0;
/* Read pong data */
spad_data = ntb_spad_read(pp->ntb, 0);
msg_data = ntb_msg_read(pp->ntb, &pidx, 0);
ntb_msg_clear_sts(pp->ntb, -1);
/*
* Scratchpad and message data may differ, since message register can't
* be rewritten unless status is cleared. Additionally either of them
* might be unsupported
*/
dev_dbg(&pp->ntb->dev, "Pong spad %#x, msg %#x (port %d)\n",
spad_data, msg_data, ntb_peer_port_number(pp->ntb, pidx));
atomic_inc(&pp->count);
ntb_db_set_mask(pp->ntb, pp->in_db);
ntb_db_clear(pp->ntb, pp->in_db);
hrtimer_start(&pp->timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
}
static void
ntb_transport_free_queue(struct ntb_transport_qp *qp)
{
struct ntb_queue_entry *entry;
if (qp == NULL)
return;
callout_drain(&qp->link_work);
ntb_db_set_mask(qp->ntb, 1ull << qp->qp_num);
taskqueue_drain(taskqueue_swi, &qp->rxc_db_work);
taskqueue_drain(taskqueue_swi, &qp->rx_completion_task);
qp->cb_data = NULL;
qp->rx_handler = NULL;
qp->tx_handler = NULL;
qp->event_handler = NULL;
while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q)))
free(entry, M_NTB_IF);
while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_post_q)))
free(entry, M_NTB_IF);
while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q)))
free(entry, M_NTB_IF);
set_bit(qp->qp_num, &qp->transport->qp_bitmap_free);
}
static void pp_clear(struct pp_ctx *pp)
{
hrtimer_cancel(&pp->timer);
ntb_db_set_mask(pp->ntb, pp->in_db);
dev_dbg(&pp->ntb->dev, "Ping-pong cancelled\n");
}
static int pp_mask_events(struct pp_ctx *pp)
{
u64 db_mask, msg_mask;
int ret;
db_mask = ntb_db_valid_mask(pp->ntb);
ret = ntb_db_set_mask(pp->ntb, db_mask);
if (ret)
return ret;
/* Skip message events masking if unsupported */
if (ntb_msg_count(pp->ntb) < 1)
return 0;
msg_mask = ntb_msg_outbits(pp->ntb) | ntb_msg_inbits(pp->ntb);
return ntb_msg_set_mask(pp->ntb, msg_mask);
}
static void pp_setup(struct pp_ctx *pp)
{
int ret;
ntb_db_set_mask(pp->ntb, pp->in_db);
hrtimer_cancel(&pp->timer);
ret = pp_find_next_peer(pp);
if (ret == -ENODEV) {
dev_dbg(&pp->ntb->dev, "Got no peers, so cancel\n");
return;
}
dev_dbg(&pp->ntb->dev, "Ping-pong started with port %d, db %#llx\n",
ntb_peer_port_number(pp->ntb, pp->out_pidx), pp->out_db);
hrtimer_start(&pp->timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
}
