kernel: backport upstream mtk_eth_soc patches

Includes MT7986 ethernet support

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 46 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/702-v5.19-24-net-ethernet-mtk_eth_soc-rely-on-txd_size-field-in-m.patch b/target/linux/generic/backport-5.15/702-v5.19-24-net-ethernet-mtk_eth_soc-rely-on-txd_size-field-in-m.patch
new file mode 100644
index 0000000000..12e88db464
--- /dev/null
+++ b/target/linux/generic/backport-5.15/702-v5.19-24-net-ethernet-mtk_eth_soc-rely-on-txd_size-field-in-m.patch
@@ -0,0 +1,46 @@
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Fri, 20 May 2022 20:11:33 +0200
+Subject: [PATCH] net: ethernet: mtk_eth_soc: rely on txd_size field in
+ mtk_poll_tx/mtk_poll_rx
+
+This is a preliminary to ad mt7986 ethernet support.
+
+Tested-by: Sam Shih <sam.shih@mediatek.com>
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -1253,9 +1253,12 @@ static struct mtk_rx_ring *mtk_get_rx_ri
+ 		return &eth->rx_ring[0];
+ 
+ 	for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
++		struct mtk_rx_dma *rxd;
++
+ 		ring = &eth->rx_ring[i];
+ 		idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
+-		if (ring->dma[idx].rxd2 & RX_DMA_DONE) {
++		rxd = (void *)ring->dma + idx * eth->soc->txrx.rxd_size;
++		if (rxd->rxd2 & RX_DMA_DONE) {
+ 			ring->calc_idx_update = true;
+ 			return ring;
+ 		}
+@@ -1306,7 +1309,7 @@ static int mtk_poll_rx(struct napi_struc
+ 			goto rx_done;
+ 
+ 		idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
+-		rxd = &ring->dma[idx];
++		rxd = (void *)ring->dma + idx * eth->soc->txrx.rxd_size;
+ 		data = ring->data[idx];
+ 
+ 		if (!mtk_rx_get_desc(&trxd, rxd))
+@@ -1495,7 +1498,7 @@ static int mtk_poll_tx_pdma(struct mtk_e
+ 
+ 		mtk_tx_unmap(eth, tx_buf, true);
+ 
+-		desc = &ring->dma[cpu];
++		desc = (void *)ring->dma + cpu * eth->soc->txrx.txd_size;
+ 		ring->last_free = desc;
+ 		atomic_inc(&ring->free_count);
+