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net: ethernet: mtk_eth_soc: rely on rxd_size field in mtk_rx_alloc/mtk_rx_clean

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Remove mtk_rx_dma structure layout dependency in mtk_rx_alloc/mtk_rx_clean.
Initialize to 0 rxd3 and rxd4 in mtk_rx_alloc.
This is a preliminary patch to add 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>
This commit is contained in:
Lorenzo Bianconi 2022-05-20 20:11:34 +02:00 committed by David S. Miller
parent 649a752775
commit 72e27d3718
1 changed files with 18 additions and 8 deletions

26
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View File

@ -1749,18 +1749,25 @@ static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)
return -ENOMEM;
for (i = 0; i < rx_dma_size; i++) {
struct mtk_rx_dma *rxd;
dma_addr_t dma_addr = dma_map_single(eth->dma_dev,
ring->data[i] + NET_SKB_PAD + eth->ip_align,
ring->buf_size,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(eth->dma_dev, dma_addr)))
return -ENOMEM;
ring->dma[i].rxd1 = (unsigned int)dma_addr;
rxd = (void *)ring->dma + i * eth->soc->txrx.rxd_size;
rxd->rxd1 = (unsigned int)dma_addr;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
ring->dma[i].rxd2 = RX_DMA_LSO;
rxd->rxd2 = RX_DMA_LSO;
else
ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size);
rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size);
rxd->rxd3 = 0;
rxd->rxd4 = 0;
}
ring->dma_size = rx_dma_size;
ring->calc_idx_update = false;
@ -1785,14 +1792,17 @@ static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring)
if (ring->data && ring->dma) {
for (i = 0; i < ring->dma_size; i++) {
struct mtk_rx_dma *rxd;
if (!ring->data[i])
continue;
if (!ring->dma[i].rxd1)
rxd = (void *)ring->dma + i * eth->soc->txrx.rxd_size;
if (!rxd->rxd1)
continue;
dma_unmap_single(eth->dma_dev,
ring->dma[i].rxd1,
ring->buf_size,
DMA_FROM_DEVICE);
dma_unmap_single(eth->dma_dev, rxd->rxd1,
ring->buf_size, DMA_FROM_DEVICE);
skb_free_frag(ring->data[i]);
}
kfree(ring->data);