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[5.10.y-cip,35/61] ravb: Add support for RZ/G2L SoC

Message ID 20220110122331.24114-36-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State Accepted
Delegated to: Pavel Machek
Headers show
Series Add Ethernet support to RZ/G2L | expand

Commit Message

Lad Prabhakar Jan. 10, 2022, 12:23 p.m. UTC 
From: Biju Das <biju.das.jz@bp.renesas.com>

commit feab85c7cceac1dfbff18cce3d089b0ca5ead565 upstream.

RZ/G2L SoC has Gigabit Ethernet IP consisting of Ethernet controller
(E-MAC), Internal TCP/IP Offload Engine (TOE) and Dedicated Direct
memory access controller (DMAC).

This patch adds compatible string for RZ/G2L and fills up the
ravb_hw_info struct. Function stubs are added which will be used by
gbeth_hw_info and will be filled incrementally.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/net/ethernet/renesas/ravb.h      |  2 +
 drivers/net/ethernet/renesas/ravb_main.c | 62 ++++++++++++++++++++++++
 2 files changed, 64 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index c343fd813cd5..b185f1bb351d 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -957,6 +957,8 @@  enum RAVB_QUEUE {
 
 #define RX_BUF_SZ	(2048 - ETH_FCS_LEN + sizeof(__sum16))
 
+#define GBETH_RX_BUFF_MAX 8192
+
 struct ravb_tstamp_skb {
 	struct list_head list;
 	struct sk_buff *skb;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 4806c07efc49..f4211afe5e68 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -83,6 +83,11 @@  static int ravb_config(struct net_device *ndev)
 	return error;
 }
 
+static void ravb_set_rate_gbeth(struct net_device *ndev)
+{
+	/* Place holder */
+}
+
 static void ravb_set_rate(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -215,6 +220,11 @@  static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
 	return free_num;
 }
 
+static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
+{
+	/* Place holder */
+}
+
 static void ravb_rx_ring_free(struct net_device *ndev, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -281,6 +291,11 @@  static void ravb_ring_free(struct net_device *ndev, int q)
 	priv->tx_skb[q] = NULL;
 }
 
+static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
+{
+	/* Place holder */
+}
+
 static void ravb_rx_ring_format(struct net_device *ndev, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -354,6 +369,12 @@  static void ravb_ring_format(struct net_device *ndev, int q)
 	desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
 }
 
+static void *ravb_alloc_rx_desc_gbeth(struct net_device *ndev, int q)
+{
+	/* Place holder */
+	return NULL;
+}
+
 static void *ravb_alloc_rx_desc(struct net_device *ndev, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -424,6 +445,11 @@  static int ravb_ring_init(struct net_device *ndev, int q)
 	return -ENOMEM;
 }
 
+static void ravb_emac_init_gbeth(struct net_device *ndev)
+{
+	/* Place holder */
+}
+
 static void ravb_rcar_emac_init(struct net_device *ndev)
 {
 	/* Receive frame limit set register */
@@ -459,6 +485,12 @@  static void ravb_emac_init(struct net_device *ndev)
 	info->emac_init(ndev);
 }
 
+static int ravb_dmac_init_gbeth(struct net_device *ndev)
+{
+	/* Place holder */
+	return 0;
+}
+
 static int ravb_dmac_init_rcar(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -582,6 +614,14 @@  static void ravb_rx_csum(struct sk_buff *skb)
 	skb_trim(skb, skb->len - sizeof(__sum16));
 }
 
+/* Packet receive function for Gigabit Ethernet */
+static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
+{
+	/* Place holder */
+	return true;
+}
+
+/* Packet receive function for Ethernet AVB */
 static bool ravb_rcar_rx(struct net_device *ndev, int *quota, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -1947,6 +1987,13 @@  static void ravb_set_rx_csum(struct net_device *ndev, bool enable)
 	spin_unlock_irqrestore(&priv->lock, flags);
 }
 
+static int ravb_set_features_gbeth(struct net_device *ndev,
+				   netdev_features_t features)
+{
+	/* Place holder */
+	return 0;
+}
+
 static int ravb_set_features_rcar(struct net_device *ndev,
 				  netdev_features_t features)
 {
@@ -2071,12 +2118,27 @@  static const struct ravb_hw_info ravb_gen2_hw_info = {
 	.nc_queue = 1,
 };
 
+static const struct ravb_hw_info gbeth_hw_info = {
+	.rx_ring_free = ravb_rx_ring_free_gbeth,
+	.rx_ring_format = ravb_rx_ring_format_gbeth,
+	.alloc_rx_desc = ravb_alloc_rx_desc_gbeth,
+	.receive = ravb_rx_gbeth,
+	.set_rate = ravb_set_rate_gbeth,
+	.set_feature = ravb_set_features_gbeth,
+	.dmac_init = ravb_dmac_init_gbeth,
+	.emac_init = ravb_emac_init_gbeth,
+	.max_rx_len = GBETH_RX_BUFF_MAX + RAVB_ALIGN - 1,
+	.aligned_tx = 1,
+	.tx_counters = 1,
+};
+
 static const struct of_device_id ravb_match_table[] = {
 	{ .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
 	{ .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
 	{ .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
 	{ .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
 	{ .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ravb_match_table);