[RFC Patch net-next v1 9/9] r8169: add support for ethtool

javen
2026-04-20T02:20:55Z

From: Javen Xu <javen_xu@realsil.com.cn>

This patch add support for changing rx queues by ethtool. We can set rx
1, 2, 4, 8 by ethtool -L eth1 rx num.

Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
drivers/net/ethernet/realtek/r8169_main.c | 68 +++++++++++++++++++++++
1 file changed, 68 insertions(+)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 6b574fc336d6..57087abe7d88 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -6518,6 +6518,72 @@ static void r8169_init_napi(struct rtl8169_private *tp)
}
}

+static void rtl8169_get_channels(struct net_device *dev,
+ struct ethtool_channels *ch)
+{
+ struct rtl8169_private *tp = netdev_priv(dev);
+
+ ch->max_rx = tp->HwSuppNumRxQueues ? tp->HwSuppNumRxQueues : 1;
+ ch->max_tx = tp->HwSuppNumTxQueues ? tp->HwSuppNumTxQueues : 1;
+ ch->max_other = 0;
+ ch->max_combined = 0;
+
+ ch->rx_count = tp->num_rx_rings;
+ ch->tx_count = tp->num_tx_rings;
+ ch->other_count = 0;
+ ch->combined_count = 0;
+}
+
+static int rtl8169_set_channels(struct net_device *dev,
+ struct ethtool_channels *ch)
+{
+ struct rtl8169_private *tp = netdev_priv(dev);
+ bool if_running = netif_running(dev);
+ int i;
+
+ if (!tp->rss_support && (ch->rx_count > 1 || ch->tx_count > 1)) {
+ netdev_warn(dev, "This chip does not support multiple channels/RSS.\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (ch->rx_count == 0 || ch->tx_count == 0)
+ return -EINVAL;
+ if (ch->rx_count > tp->HwSuppNumRxQueues ||
+ ch->tx_count > tp->HwSuppNumTxQueues)
+ return -EINVAL;
+ if (ch->other_count || ch->combined_count)
+ return -EINVAL;
+
+ if (ch->rx_count == tp->num_rx_rings &&
+ ch->tx_count == tp->num_tx_rings)
+ return 0;
+
+ if (if_running)
+ rtl8169_close(dev);
+
+ tp->num_rx_rings = ch->rx_count;
+ tp->num_tx_rings = ch->tx_count;
+
+ tp->rss_enable = (tp->num_rx_rings > 1 && tp->rss_support);
+
+ for (i = 0; i < tp->HwSuppIndirTblEntries; i++) {
+ if (tp->rss_enable)
+ tp->rss_indir_tbl[i] = ethtool_rxfh_indir_default(i, tp->num_rx_rings);
+ else
+ tp->rss_indir_tbl[i] = 0;
+ }
+
+ if (tp->rss_enable)
+ tp->InitRxDescType = RX_DESC_RING_TYPE_RSS;
+ else
+ tp->InitRxDescType = RX_DESC_RING_TYPE_DEAFULT;
+
+ if (if_running)
+ return rtl_open(dev);
+
+ return 0;
+}
+
static const struct ethtool_ops rtl8169_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_MAX_FRAMES,
@@ -6536,6 +6602,8 @@ static const struct ethtool_ops rtl8169_ethtool_ops = {
.nway_reset = phy_ethtool_nway_reset,
.get_eee = rtl8169_get_eee,
.set_eee = rtl8169_set_eee,
+ .get_channels = rtl8169_get_channels,
+ .set_channels = rtl8169_set_channels,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = rtl8169_set_link_ksettings,
.get_ringparam = rtl8169_get_ringparam,
--
2.43.0