[openwrt/openwrt] realtek: eth: define hardware receive rings in config

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/428c0c3635128ca1f1a887fe84d2831f2f3c08f2

commit 428c0c3635128ca1f1a887fe84d2831f2f3c08f2
Author: Markus Stockhausen <markus.stockhausen at gmx.de>
AuthorDate: Sun Jan 25 21:33:02 2026 +0100

    realtek: eth: define hardware receive rings in config
    
    Do not derive the number of hardware receive rings from the SoC
    family. Instead add the information to the configuration
    structure. Make use of it during ethernet driver probing.
    
    Signed-off-by: Markus Stockhausen <markus.stockhausen at gmx.de>
    Link: https://github.com/openwrt/openwrt/pull/21706
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 .../realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c  | 14 ++++++++------
 .../realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.h  |  1 +
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c b/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c
index 67cdaa5e73..d27c750152 100644
--- a/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c
+++ b/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c
@@ -1453,6 +1453,7 @@ static const struct net_device_ops rteth_838x_netdev_ops = {
 static const struct rteth_config rteth_838x_cfg = {
 	.family_id = RTL8380_FAMILY_ID,
 	.cpu_port = RTETH_838X_CPU_PORT,
+	.rx_rings = 8,
 	.net_irq = rteth_83xx_net_irq,
 	.mac_l2_port_ctrl = RTETH_838X_MAC_L2_PORT_CTRL,
 	.dma_if_intr_sts = RTL838X_DMA_IF_INTR_STS,
@@ -1496,6 +1497,7 @@ static const struct net_device_ops rteth_839x_netdev_ops = {
 static const struct rteth_config rteth_839x_cfg = {
 	.family_id = RTL8390_FAMILY_ID,
 	.cpu_port = RTETH_839X_CPU_PORT,
+	.rx_rings = 8,
 	.net_irq = rteth_83xx_net_irq,
 	.mac_l2_port_ctrl = RTETH_839X_MAC_L2_PORT_CTRL,
 	.dma_if_intr_sts = RTL839X_DMA_IF_INTR_STS,
@@ -1539,6 +1541,7 @@ static const struct net_device_ops rteth_930x_netdev_ops = {
 static const struct rteth_config rteth_930x_cfg = {
 	.family_id = RTL9300_FAMILY_ID,
 	.cpu_port = RTETH_930X_CPU_PORT,
+	.rx_rings = 32,
 	.net_irq = rteth_93xx_net_irq,
 	.mac_l2_port_ctrl = RTETH_930X_MAC_L2_PORT_CTRL,
 	.dma_if_intr_rx_runout_sts = RTL930X_DMA_IF_INTR_RX_RUNOUT_STS,
@@ -1587,6 +1590,7 @@ static const struct net_device_ops rteth_931x_netdev_ops = {
 static const struct rteth_config rteth_931x_cfg = {
 	.family_id = RTL9310_FAMILY_ID,
 	.cpu_port = RTETH_931X_CPU_PORT,
+	.rx_rings = 32,
 	.net_irq = rteth_93xx_net_irq,
 	.mac_l2_port_ctrl = RTETH_931X_MAC_L2_PORT_CTRL,
 	.dma_if_intr_rx_runout_sts = RTL931X_DMA_IF_INTR_RX_RUNOUT_STS,
@@ -1643,7 +1647,7 @@ static int rtl838x_eth_probe(struct platform_device *pdev)
 	struct net_device *dev;
 	struct device_node *dn = pdev->dev.of_node;
 	struct rteth_ctrl *ctrl;
-	const struct rteth_config *matchdata;
+	const struct rteth_config *cfg;
 	phy_interface_t phy_mode;
 	struct phylink *phylink;
 	u8 mac_addr[ETH_ALEN] = {0};
@@ -1658,11 +1662,9 @@ static int rtl838x_eth_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	matchdata = (const struct rteth_config *)device_get_match_data(&pdev->dev);
+	cfg = device_get_match_data(&pdev->dev);
 
-	rxrings = (matchdata->family_id == RTL8380_FAMILY_ID ||
-		   matchdata->family_id == RTL8390_FAMILY_ID) ? 8 : 32;
-	rxrings = rxrings > MAX_RXRINGS ? MAX_RXRINGS : rxrings;
+	rxrings = cfg->rx_rings > MAX_RXRINGS ? MAX_RXRINGS : cfg->rx_rings;
 	rxringlen = MAX_ENTRIES / rxrings;
 	rxringlen = rxringlen > MAX_RXLEN ? MAX_RXLEN : rxringlen;
 
@@ -1671,7 +1673,7 @@ static int rtl838x_eth_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	SET_NETDEV_DEV(dev, &pdev->dev);
 	ctrl = netdev_priv(dev);
-	ctrl->r = matchdata;
+	ctrl->r = cfg;
 
 	/* Allocate buffer memory */
 	ctrl->membase = dmam_alloc_coherent(&pdev->dev, rxrings * rxringlen * RING_BUFFER +
diff --git a/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.h b/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.h
index cdd3b61229..7120abb659 100644
--- a/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.h
+++ b/target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.h
@@ -408,6 +408,7 @@ struct rteth_packet;
 struct rteth_config {
 	int family_id;
 	int cpu_port;
+	int rx_rings;
 	irqreturn_t (*net_irq)(int irq, void *dev_id);
 	int mac_l2_port_ctrl;
 	int dma_if_intr_sts;