diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/750-v6.5-19-net-ethernet-mtk_eth_soc-support-36-bit-DMA-addressi.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/750-v6.5-19-net-ethernet-mtk_eth_soc-support-36-bit-DMA-addressi.patch | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/750-v6.5-19-net-ethernet-mtk_eth_soc-support-36-bit-DMA-addressi.patch b/target/linux/generic/backport-5.15/750-v6.5-19-net-ethernet-mtk_eth_soc-support-36-bit-DMA-addressi.patch new file mode 100644 index 0000000000..175db56c37 --- /dev/null +++ b/target/linux/generic/backport-5.15/750-v6.5-19-net-ethernet-mtk_eth_soc-support-36-bit-DMA-addressi.patch @@ -0,0 +1,166 @@ +From 0b0d606eb9650fa01dd5621e072aa29a10544399 Mon Sep 17 00:00:00 2001 +From: Daniel Golle <daniel@makrotopia.org> +Date: Tue, 22 Aug 2023 17:33:12 +0100 +Subject: [PATCH 113/250] net: ethernet: mtk_eth_soc: support 36-bit DMA + addressing on MT7988 + +Systems having 4 GiB of RAM and more require DMA addressing beyond the +current 32-bit limit. Starting from MT7988 the hardware now supports +36-bit DMA addressing, let's use that new capability in the driver to +avoid running into swiotlb on systems with 4 GiB of RAM or more. + +Signed-off-by: Daniel Golle <daniel@makrotopia.org> +Link: https://lore.kernel.org/r/95b919c98876c9e49761e44662e7c937479eecb8.1692721443.git.daniel@makrotopia.org +Signed-off-by: Jakub Kicinski <kuba@kernel.org> +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 30 +++++++++++++++++++-- + drivers/net/ethernet/mediatek/mtk_eth_soc.h | 22 +++++++++++++-- + 2 files changed, 48 insertions(+), 4 deletions(-) + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -1266,6 +1266,10 @@ static void mtk_tx_set_dma_desc_v2(struc + data = TX_DMA_PLEN0(info->size); + if (info->last) + data |= TX_DMA_LS0; ++ ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_36BIT_DMA)) ++ data |= TX_DMA_PREP_ADDR64(info->addr); ++ + WRITE_ONCE(desc->txd3, data); + + /* set forward port */ +@@ -1933,6 +1937,7 @@ static int mtk_poll_rx(struct napi_struc + bool xdp_flush = false; + int idx; + struct sk_buff *skb; ++ u64 addr64 = 0; + u8 *data, *new_data; + struct mtk_rx_dma_v2 *rxd, trxd; + int done = 0, bytes = 0; +@@ -2048,7 +2053,10 @@ static int mtk_poll_rx(struct napi_struc + goto release_desc; + } + +- dma_unmap_single(eth->dma_dev, trxd.rxd1, ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_36BIT_DMA)) ++ addr64 = RX_DMA_GET_ADDR64(trxd.rxd2); ++ ++ dma_unmap_single(eth->dma_dev, ((u64)trxd.rxd1 | addr64), + ring->buf_size, DMA_FROM_DEVICE); + + skb = build_skb(data, ring->frag_size); +@@ -2114,6 +2122,9 @@ release_desc: + else + rxd->rxd2 = RX_DMA_PREP_PLEN0(ring->buf_size); + ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_36BIT_DMA)) ++ rxd->rxd2 |= RX_DMA_PREP_ADDR64(dma_addr); ++ + ring->calc_idx = idx; + done++; + } +@@ -2598,6 +2609,9 @@ static int mtk_rx_alloc(struct mtk_eth * + else + rxd->rxd2 = RX_DMA_PREP_PLEN0(ring->buf_size); + ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_36BIT_DMA)) ++ rxd->rxd2 |= RX_DMA_PREP_ADDR64(dma_addr); ++ + rxd->rxd3 = 0; + rxd->rxd4 = 0; + if (mtk_is_netsys_v2_or_greater(eth)) { +@@ -2644,6 +2658,7 @@ static int mtk_rx_alloc(struct mtk_eth * + + static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring, bool in_sram) + { ++ u64 addr64 = 0; + int i; + + if (ring->data && ring->dma) { +@@ -2657,7 +2672,10 @@ static void mtk_rx_clean(struct mtk_eth + if (!rxd->rxd1) + continue; + +- dma_unmap_single(eth->dma_dev, rxd->rxd1, ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_36BIT_DMA)) ++ addr64 = RX_DMA_GET_ADDR64(rxd->rxd2); ++ ++ dma_unmap_single(eth->dma_dev, ((u64)rxd->rxd1 | addr64), + ring->buf_size, DMA_FROM_DEVICE); + mtk_rx_put_buff(ring, ring->data[i], false); + } +@@ -4643,6 +4661,14 @@ static int mtk_probe(struct platform_dev + } + } + ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_36BIT_DMA)) { ++ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36)); ++ if (err) { ++ dev_err(&pdev->dev, "Wrong DMA config\n"); ++ return -EINVAL; ++ } ++ } ++ + spin_lock_init(ð->page_lock); + spin_lock_init(ð->tx_irq_lock); + spin_lock_init(ð->rx_irq_lock); +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h +@@ -331,6 +331,14 @@ + #define TX_DMA_PLEN1(x) ((x) & eth->soc->txrx.dma_max_len) + #define TX_DMA_SWC BIT(14) + #define TX_DMA_PQID GENMASK(3, 0) ++#define TX_DMA_ADDR64_MASK GENMASK(3, 0) ++#if IS_ENABLED(CONFIG_64BIT) ++# define TX_DMA_GET_ADDR64(x) (((u64)FIELD_GET(TX_DMA_ADDR64_MASK, (x))) << 32) ++# define TX_DMA_PREP_ADDR64(x) FIELD_PREP(TX_DMA_ADDR64_MASK, ((x) >> 32)) ++#else ++# define TX_DMA_GET_ADDR64(x) (0) ++# define TX_DMA_PREP_ADDR64(x) (0) ++#endif + + /* PDMA on MT7628 */ + #define TX_DMA_DONE BIT(31) +@@ -343,6 +351,14 @@ + #define RX_DMA_PREP_PLEN0(x) (((x) & eth->soc->txrx.dma_max_len) << eth->soc->txrx.dma_len_offset) + #define RX_DMA_GET_PLEN0(x) (((x) >> eth->soc->txrx.dma_len_offset) & eth->soc->txrx.dma_max_len) + #define RX_DMA_VTAG BIT(15) ++#define RX_DMA_ADDR64_MASK GENMASK(3, 0) ++#if IS_ENABLED(CONFIG_64BIT) ++# define RX_DMA_GET_ADDR64(x) (((u64)FIELD_GET(RX_DMA_ADDR64_MASK, (x))) << 32) ++# define RX_DMA_PREP_ADDR64(x) FIELD_PREP(RX_DMA_ADDR64_MASK, ((x) >> 32)) ++#else ++# define RX_DMA_GET_ADDR64(x) (0) ++# define RX_DMA_PREP_ADDR64(x) (0) ++#endif + + /* QDMA descriptor rxd3 */ + #define RX_DMA_VID(x) ((x) & VLAN_VID_MASK) +@@ -939,6 +955,7 @@ enum mkt_eth_capabilities { + MTK_RSTCTRL_PPE2_BIT, + MTK_U3_COPHY_V2_BIT, + MTK_SRAM_BIT, ++ MTK_36BIT_DMA_BIT, + + /* MUX BITS*/ + MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT, +@@ -975,6 +992,7 @@ enum mkt_eth_capabilities { + #define MTK_RSTCTRL_PPE2 BIT_ULL(MTK_RSTCTRL_PPE2_BIT) + #define MTK_U3_COPHY_V2 BIT_ULL(MTK_U3_COPHY_V2_BIT) + #define MTK_SRAM BIT_ULL(MTK_SRAM_BIT) ++#define MTK_36BIT_DMA BIT_ULL(MTK_36BIT_DMA_BIT) + + #define MTK_ETH_MUX_GDM1_TO_GMAC1_ESW \ + BIT_ULL(MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT) +@@ -1056,8 +1074,8 @@ enum mkt_eth_capabilities { + MTK_MUX_GMAC12_TO_GEPHY_SGMII | MTK_QDMA | \ + MTK_RSTCTRL_PPE1 | MTK_SRAM) + +-#define MT7988_CAPS (MTK_GDM1_ESW | MTK_QDMA | MTK_RSTCTRL_PPE1 | \ +- MTK_RSTCTRL_PPE2 | MTK_SRAM) ++#define MT7988_CAPS (MTK_36BIT_DMA | MTK_GDM1_ESW | MTK_QDMA | \ ++ MTK_RSTCTRL_PPE1 | MTK_RSTCTRL_PPE2 | MTK_SRAM) + + struct mtk_tx_dma_desc_info { + dma_addr_t addr; 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