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realtek: eth: disable tx interrupts

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Ethernet transmit handling processes data synchronously via a
packet buffer. As soon as it kicks the SoC to send the packet
no more post processing is needed. Especially there is no need
for transmit completion interrupts. Disable them to reduce the
CPU load.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21778
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2026-01-28 17:30:19 +01:00 • committed by Robert Marko
parent a4e92f0484
commit ebea3d3826
1 changed files with 6 additions and 6 deletions
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12
target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c
View file

@ -542,8 +542,8 @@ static void rtl838x_hw_en_rxtx(struct rteth_ctrl *ctrl)
/* Truncate RX buffer to DEFAULT_MTU bytes, pad TX */
sw_w32((DEFAULT_MTU << 16) | RX_TRUNCATE_EN_83XX | TX_PAD_EN_838X, ctrl->r->dma_if_ctrl);
/* Enable RX done, RX overflow and TX done interrupts */
sw_w32(0xfffff, ctrl->r->dma_if_intr_msk);
/* Enable RX done and RX overflow, TX done interrupts not needed */
sw_w32(0xffff, ctrl->r->dma_if_intr_msk);
/* Enable DMA, engine expects empty FCS field */
sw_w32_mask(0, RX_EN | TX_EN, ctrl->r->dma_if_ctrl);
@ -566,8 +566,8 @@ static void rtl839x_hw_en_rxtx(struct rteth_ctrl *ctrl)
/* Setup CPU-Port: RX Buffer */
sw_w32((DEFAULT_MTU << 5) | RX_TRUNCATE_EN_83XX, ctrl->r->dma_if_ctrl);
/* Enable Notify, RX done, RX overflow and TX done interrupts */
sw_w32(0x007fffff, ctrl->r->dma_if_intr_msk); /* Notify IRQ! */
/* Enable Notify, RX done and RX overflow, TX done interrupts not needed */
sw_w32(0x0070ffff, ctrl->r->dma_if_intr_msk); /* Notify IRQ! */
/* Enable DMA */
sw_w32_mask(0, RX_EN | TX_EN, ctrl->r->dma_if_ctrl);
@ -602,10 +602,10 @@ static void rtl93xx_hw_en_rxtx(struct rteth_ctrl *ctrl)
sw_w32_mask(0x3ff << pos, v, ctrl->r->dma_if_rx_ring_cntr(i));
}
/* Enable Notify, RX done, RX overflow and TX done interrupts */
/* Enable Notify, RX done and RX overflow, TX done interrupts not needed */
sw_w32(0xffffffff, ctrl->r->dma_if_intr_rx_runout_msk);
sw_w32(0xffffffff, ctrl->r->dma_if_intr_rx_done_msk);
sw_w32(0x0000000f, ctrl->r->dma_if_intr_tx_done_msk);
sw_w32(0x00000000, ctrl->r->dma_if_intr_tx_done_msk);
/* Enable DMA */
sw_w32_mask(0, RX_EN_93XX | TX_EN_93XX, ctrl->r->dma_if_ctrl);