diff mbox series

[net-next,05/13] ravb: Factorise ravb_ring_free function

Message ID 20210825070154.14336-6-biju.das.jz@bp.renesas.com
State New
Headers show
Series Add Factorisation code to support Gigabit Ethernet driver | expand

Commit Message

Biju Das Aug. 25, 2021, 7:01 a.m. UTC 
R-Car uses extended descriptor in RX, whereas RZ/G2L uses normal
descriptor. Factorise ravb_ring_free function so that it can
support later SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/net/ethernet/renesas/ravb.h      |  1 +
 drivers/net/ethernet/renesas/ravb_main.c | 47 +++++++++++++++---------
 2 files changed, 31 insertions(+), 17 deletions(-)

Comments

Sergey Shtylyov Aug. 25, 2021, 8:53 p.m. UTC | #1 
On 8/25/21 10:01 AM, Biju Das wrote:

> R-Car uses extended descriptor in RX, whereas RZ/G2L uses normal
> descriptor. Factorise ravb_ring_free function so that it can
> support later SoC.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
[...]

> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index 209e030935aa..7cb30319524a 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
[...]
> index 883db1049882..dc388a32496a 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -216,31 +216,42 @@ static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
>  	return free_num;
>  }
>  
> +static void ravb_rx_ring_free(struct net_device *ndev, int q)
> +{
> +	struct ravb_private *priv = netdev_priv(ndev);
> +	unsigned int ring_size;
> +	unsigned int i;
> +
> +	if (!priv->rx_ring[q])
> +		return;
> +
> +	for (i = 0; i < priv->num_rx_ring[q]; i++) {
> +		struct ravb_ex_rx_desc *desc = &priv->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),
> +					 RX_BUF_SZ,
> +					 DMA_FROM_DEVICE);

   I think we could reflow this argument list, so that it takes less lines...

> +	}
> +	ring_size = sizeof(struct ravb_ex_rx_desc) *
> +		    (priv->num_rx_ring[q] + 1);

   Here as well...

[...]

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

MBR, Sergey
diff mbox series

Patch

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 209e030935aa..7cb30319524a 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -980,6 +980,7 @@  struct ravb_ptp {
 };
 
 struct ravb_hw_info {
+	void (*rx_ring_free)(struct net_device *ndev, int q);
 	const char (*gstrings_stats)[ETH_GSTRING_LEN];
 	size_t gstrings_size;
 	netdev_features_t net_hw_features;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 883db1049882..dc388a32496a 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -216,31 +216,42 @@  static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
 	return free_num;
 }
 
+static void ravb_rx_ring_free(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	unsigned int ring_size;
+	unsigned int i;
+
+	if (!priv->rx_ring[q])
+		return;
+
+	for (i = 0; i < priv->num_rx_ring[q]; i++) {
+		struct ravb_ex_rx_desc *desc = &priv->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),
+					 RX_BUF_SZ,
+					 DMA_FROM_DEVICE);
+	}
+	ring_size = sizeof(struct ravb_ex_rx_desc) *
+		    (priv->num_rx_ring[q] + 1);
+	dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
+			  priv->rx_desc_dma[q]);
+	priv->rx_ring[q] = NULL;
+}
+
 /* Free skb's and DMA buffers for Ethernet AVB */
 static void ravb_ring_free(struct net_device *ndev, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
 	unsigned int num_tx_desc = priv->num_tx_desc;
 	unsigned int ring_size;
 	unsigned int i;
 
-	if (priv->rx_ring[q]) {
-		for (i = 0; i < priv->num_rx_ring[q]; i++) {
-			struct ravb_ex_rx_desc *desc = &priv->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),
-						 RX_BUF_SZ,
-						 DMA_FROM_DEVICE);
-		}
-		ring_size = sizeof(struct ravb_ex_rx_desc) *
-			    (priv->num_rx_ring[q] + 1);
-		dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
-				  priv->rx_desc_dma[q]);
-		priv->rx_ring[q] = NULL;
-	}
+	info->rx_ring_free(ndev, q);
 
 	if (priv->tx_ring[q]) {
 		ravb_tx_free(ndev, q, false);
@@ -1937,6 +1948,7 @@  static int ravb_mdio_release(struct ravb_private *priv)
 }
 
 static const struct ravb_hw_info ravb_gen3_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free,
 	.gstrings_stats = ravb_gstrings_stats,
 	.gstrings_size = sizeof(ravb_gstrings_stats),
 	.net_hw_features = NETIF_F_RXCSUM,
@@ -1950,6 +1962,7 @@  static const struct ravb_hw_info ravb_gen3_hw_info = {
 };
 
 static const struct ravb_hw_info ravb_gen2_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free,
 	.gstrings_stats = ravb_gstrings_stats,
 	.gstrings_size = sizeof(ravb_gstrings_stats),
 	.net_hw_features = NETIF_F_RXCSUM,