[RFC/PATCH 13/18] ravb: Add rx_ring_free function support for GbEthernet
From: Biju Das <biju.das.jz@bp.renesas.com>
Date: 2021-09-23 14:09:07
Also in:
linux-renesas-soc
Subsystem:
networking drivers, renesas ethernet avb driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Niklas Söderlund, Linus Torvalds
This patch adds rx_ring_free function support for GbEthernet found on RZ/G2L SoC. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> --- drivers/net/ethernet/renesas/ravb_main.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 2c375002ebcb..038af36141bb 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c@@ -236,7 +236,27 @@ static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only) static void ravb_rx_ring_free_rgeth(struct net_device *ndev, int q) { - /* Place holder */ + struct ravb_private *priv = netdev_priv(ndev); + unsigned int ring_size; + unsigned int i; + + if (!priv->rgeth_rx_ring[q]) + return; + + for (i = 0; i < priv->num_rx_ring[q]; i++) { + struct ravb_rx_desc *desc = &priv->rgeth_rx_ring[q][i]; + + if (!dma_mapping_error(ndev->dev.parent, + le32_to_cpu(desc->dptr))) + dma_unmap_single(ndev->dev.parent, + le32_to_cpu(desc->dptr), + RGETH_RX_BUFF_MAX, + DMA_FROM_DEVICE); + } + ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1); + dma_free_coherent(ndev->dev.parent, ring_size, priv->rgeth_rx_ring[q], + priv->rx_desc_dma[q]); + priv->rgeth_rx_ring[q] = NULL; } static void ravb_rx_ring_free(struct net_device *ndev, int q)
--
2.17.1