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ceb1451c10
- implement multiqueue via qdma hardware shaper to deal with ports with different speeds - implement hardware DSA untagging - add NETIF_F_ALL_TSO to reduce unnecessary segmentation Signed-off-by: Felix Fietkau <nbd@nbd.name>
144 lines
4.7 KiB
Diff
144 lines
4.7 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 27 Oct 2022 19:53:57 +0200
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Subject: [PATCH] net: ethernet: mtk_eth_soc: increase tx ring side for
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QDMA devices
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In order to use the hardware traffic shaper feature, a larger tx ring is
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needed, especially for the scratch ring, which the hardware shaper uses to
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reorder packets.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@@ -894,7 +894,7 @@ static int mtk_init_fq_dma(struct mtk_et
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{
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const struct mtk_soc_data *soc = eth->soc;
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dma_addr_t phy_ring_tail;
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- int cnt = MTK_DMA_SIZE;
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+ int cnt = MTK_QDMA_RING_SIZE;
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dma_addr_t dma_addr;
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int i;
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@@ -2148,19 +2148,25 @@ static int mtk_tx_alloc(struct mtk_eth *
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struct mtk_tx_ring *ring = ð->tx_ring;
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int i, sz = soc->txrx.txd_size;
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struct mtk_tx_dma_v2 *txd;
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+ int ring_size;
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- ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf),
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+ if (MTK_HAS_CAPS(soc->caps, MTK_QDMA))
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+ ring_size = MTK_QDMA_RING_SIZE;
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+ else
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+ ring_size = MTK_DMA_SIZE;
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+
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+ ring->buf = kcalloc(ring_size, sizeof(*ring->buf),
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GFP_KERNEL);
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if (!ring->buf)
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goto no_tx_mem;
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- ring->dma = dma_alloc_coherent(eth->dma_dev, MTK_DMA_SIZE * sz,
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+ ring->dma = dma_alloc_coherent(eth->dma_dev, ring_size * sz,
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&ring->phys, GFP_KERNEL);
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if (!ring->dma)
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goto no_tx_mem;
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- for (i = 0; i < MTK_DMA_SIZE; i++) {
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- int next = (i + 1) % MTK_DMA_SIZE;
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+ for (i = 0; i < ring_size; i++) {
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+ int next = (i + 1) % ring_size;
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u32 next_ptr = ring->phys + next * sz;
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txd = ring->dma + i * sz;
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@@ -2180,22 +2186,22 @@ static int mtk_tx_alloc(struct mtk_eth *
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* descriptors in ring->dma_pdma.
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*/
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if (!MTK_HAS_CAPS(soc->caps, MTK_QDMA)) {
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- ring->dma_pdma = dma_alloc_coherent(eth->dma_dev, MTK_DMA_SIZE * sz,
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+ ring->dma_pdma = dma_alloc_coherent(eth->dma_dev, ring_size * sz,
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&ring->phys_pdma, GFP_KERNEL);
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if (!ring->dma_pdma)
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goto no_tx_mem;
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- for (i = 0; i < MTK_DMA_SIZE; i++) {
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+ for (i = 0; i < ring_size; i++) {
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ring->dma_pdma[i].txd2 = TX_DMA_DESP2_DEF;
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ring->dma_pdma[i].txd4 = 0;
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}
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}
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- ring->dma_size = MTK_DMA_SIZE;
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- atomic_set(&ring->free_count, MTK_DMA_SIZE - 2);
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+ ring->dma_size = ring_size;
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+ atomic_set(&ring->free_count, ring_size - 2);
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ring->next_free = ring->dma;
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ring->last_free = (void *)txd;
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- ring->last_free_ptr = (u32)(ring->phys + ((MTK_DMA_SIZE - 1) * sz));
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+ ring->last_free_ptr = (u32)(ring->phys + ((ring_size - 1) * sz));
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ring->thresh = MAX_SKB_FRAGS;
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/* make sure that all changes to the dma ring are flushed before we
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@@ -2207,14 +2213,14 @@ static int mtk_tx_alloc(struct mtk_eth *
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mtk_w32(eth, ring->phys, soc->reg_map->qdma.ctx_ptr);
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mtk_w32(eth, ring->phys, soc->reg_map->qdma.dtx_ptr);
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mtk_w32(eth,
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- ring->phys + ((MTK_DMA_SIZE - 1) * sz),
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+ ring->phys + ((ring_size - 1) * sz),
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soc->reg_map->qdma.crx_ptr);
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mtk_w32(eth, ring->last_free_ptr, soc->reg_map->qdma.drx_ptr);
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mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES,
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soc->reg_map->qdma.qtx_cfg);
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} else {
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mtk_w32(eth, ring->phys_pdma, MT7628_TX_BASE_PTR0);
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- mtk_w32(eth, MTK_DMA_SIZE, MT7628_TX_MAX_CNT0);
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+ mtk_w32(eth, ring_size, MT7628_TX_MAX_CNT0);
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mtk_w32(eth, 0, MT7628_TX_CTX_IDX0);
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mtk_w32(eth, MT7628_PST_DTX_IDX0, soc->reg_map->pdma.rst_idx);
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}
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@@ -2232,7 +2238,7 @@ static void mtk_tx_clean(struct mtk_eth
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int i;
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if (ring->buf) {
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- for (i = 0; i < MTK_DMA_SIZE; i++)
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+ for (i = 0; i < ring->dma_size; i++)
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mtk_tx_unmap(eth, &ring->buf[i], false);
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kfree(ring->buf);
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ring->buf = NULL;
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@@ -2240,14 +2246,14 @@ static void mtk_tx_clean(struct mtk_eth
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if (ring->dma) {
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dma_free_coherent(eth->dma_dev,
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- MTK_DMA_SIZE * soc->txrx.txd_size,
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+ ring->dma_size * soc->txrx.txd_size,
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ring->dma, ring->phys);
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ring->dma = NULL;
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}
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if (ring->dma_pdma) {
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dma_free_coherent(eth->dma_dev,
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- MTK_DMA_SIZE * soc->txrx.txd_size,
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+ ring->dma_size * soc->txrx.txd_size,
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ring->dma_pdma, ring->phys_pdma);
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ring->dma_pdma = NULL;
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}
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@@ -2767,7 +2773,7 @@ static void mtk_dma_free(struct mtk_eth
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netdev_reset_queue(eth->netdev[i]);
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if (eth->scratch_ring) {
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dma_free_coherent(eth->dma_dev,
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- MTK_DMA_SIZE * soc->txrx.txd_size,
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+ MTK_QDMA_RING_SIZE * soc->txrx.txd_size,
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eth->scratch_ring, eth->phy_scratch_ring);
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eth->scratch_ring = NULL;
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eth->phy_scratch_ring = 0;
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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@@ -27,6 +27,7 @@
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#define MTK_MAX_RX_LENGTH_2K 2048
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#define MTK_TX_DMA_BUF_LEN 0x3fff
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#define MTK_TX_DMA_BUF_LEN_V2 0xffff
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+#define MTK_QDMA_RING_SIZE 2048
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#define MTK_DMA_SIZE 512
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#define MTK_MAC_COUNT 2
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#define MTK_RX_ETH_HLEN (VLAN_ETH_HLEN + ETH_FCS_LEN)
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