@@ -36,6 +36,8 @@ static void ionic_lif_handle_fw_down(struct ionic_lif *lif);
static void ionic_lif_handle_fw_up(struct ionic_lif *lif);
static void ionic_lif_set_netdev_info(struct ionic_lif *lif);
+static void ionic_txrx_deinit(struct ionic_lif *lif);
+static int ionic_txrx_init(struct ionic_lif *lif);
static int ionic_start_queues(struct ionic_lif *lif);
static void ionic_stop_queues(struct ionic_lif *lif);
static void ionic_lif_queue_identify(struct ionic_lif *lif);
@@ -593,6 +595,17 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
return err;
}
+static void ionic_qcq_sanitize(struct ionic_qcq *qcq)
+{
+ qcq->q.tail_idx = 0;
+ qcq->q.head_idx = 0;
+ qcq->cq.tail_idx = 0;
+ qcq->cq.done_color = 1;
+ memset(qcq->q_base, 0, qcq->q_size);
+ memset(qcq->cq_base, 0, qcq->cq_size);
+ memset(qcq->sg_base, 0, qcq->sg_size);
+}
+
static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
{
struct device *dev = lif->ionic->dev;
@@ -632,9 +645,7 @@ static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
dev_dbg(dev, "txq_init.ver %d\n", ctx.cmd.q_init.ver);
dev_dbg(dev, "txq_init.intr_index %d\n", ctx.cmd.q_init.intr_index);
- q->tail_idx = 0;
- q->head_idx = 0;
- cq->tail_idx = 0;
+ ionic_qcq_sanitize(qcq);
err = ionic_adminq_post_wait(lif, &ctx);
if (err)
@@ -689,9 +700,7 @@ static int ionic_lif_rxq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
dev_dbg(dev, "rxq_init.ver %d\n", ctx.cmd.q_init.ver);
dev_dbg(dev, "rxq_init.intr_index %d\n", ctx.cmd.q_init.intr_index);
- q->tail_idx = 0;
- q->head_idx = 0;
- cq->tail_idx = 0;
+ ionic_qcq_sanitize(qcq);
err = ionic_adminq_post_wait(lif, &ctx);
if (err)
@@ -1307,6 +1316,35 @@ static int ionic_set_mac_address(struct net_device *netdev, void *sa)
return ionic_addr_add(netdev, mac);
}
+static void ionic_stop_queues_reconfig(struct ionic_lif *lif)
+{
+ /* Stop and clean the queues before reconfiguration */
+ mutex_lock(&lif->queue_lock);
+ netif_device_detach(lif->netdev);
+ ionic_stop_queues(lif);
+ ionic_txrx_deinit(lif);
+}
+
+static int ionic_start_queues_reconfig(struct ionic_lif *lif)
+{
+ int err;
+
+ /* Re-init the queues after reconfiguration */
+
+ /* The only way txrx_init can fail here is if communication
+ * with FW is suddenly broken. There's not much we can do
+ * at this point - error messages have already been printed,
+ * so we can continue on and the user can eventually do a
+ * DOWN and UP to try to reset and clear the issue.
+ */
+ err = ionic_txrx_init(lif);
+ mutex_unlock(&lif->queue_lock);
+ ionic_link_status_check_request(lif);
+ netif_device_attach(lif->netdev);
+
+ return err;
+}
+
static int ionic_change_mtu(struct net_device *netdev, int new_mtu)
{
struct ionic_lif *lif = netdev_priv(netdev);
@@ -1326,9 +1364,12 @@ static int ionic_change_mtu(struct net_device *netdev, int new_mtu)
return err;
netdev->mtu = new_mtu;
- err = ionic_reset_queues(lif, NULL, NULL);
+ /* if we're not running, nothing more to do */
+ if (!netif_running(netdev))
+ return 0;
- return err;
+ ionic_stop_queues_reconfig(lif);
+ return ionic_start_queues_reconfig(lif);
}
static void ionic_tx_timeout_work(struct work_struct *ws)
We really don't need to tear down and rebuild the whole queue structure when changing the MTU; we can simply stop the queues, clean and refill, then restart the queues. Signed-off-by: Shannon Nelson <snelson@pensando.io> --- .../net/ethernet/pensando/ionic/ionic_lif.c | 57 ++++++++++++++++--- 1 file changed, 49 insertions(+), 8 deletions(-)