diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/750-v6.5-18-net-ethernet-mtk_eth_soc-add-support-for-in-SoC-SRAM.patch')
-rw-r--r-- | target/linux/generic/backport-5.15/750-v6.5-18-net-ethernet-mtk_eth_soc-add-support-for-in-SoC-SRAM.patch | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/750-v6.5-18-net-ethernet-mtk_eth_soc-add-support-for-in-SoC-SRAM.patch b/target/linux/generic/backport-5.15/750-v6.5-18-net-ethernet-mtk_eth_soc-add-support-for-in-SoC-SRAM.patch new file mode 100644 index 0000000000..67ba1a5f0a --- /dev/null +++ b/target/linux/generic/backport-5.15/750-v6.5-18-net-ethernet-mtk_eth_soc-add-support-for-in-SoC-SRAM.patch @@ -0,0 +1,254 @@ +From 25ce45fe40b574e5d7ffa407f7f2db03e7d5a910 Mon Sep 17 00:00:00 2001 +From: Daniel Golle <daniel@makrotopia.org> +Date: Tue, 22 Aug 2023 17:32:54 +0100 +Subject: [PATCH 112/250] net: ethernet: mtk_eth_soc: add support for in-SoC + SRAM + +MT7981, MT7986 and MT7988 come with in-SoC SRAM dedicated for Ethernet +DMA rings. Support using the SRAM without breaking existing device tree +bindings, ie. only new SoC starting from MT7988 will have the SRAM +declared as additional resource in device tree. For MT7981 and MT7986 +an offset on top of the main I/O base is used. + +Signed-off-by: Daniel Golle <daniel@makrotopia.org> +Link: https://lore.kernel.org/r/e45e0f230c63ad58869e8fe35b95a2fb8925b625.1692721443.git.daniel@makrotopia.org +Signed-off-by: Jakub Kicinski <kuba@kernel.org> +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 88 ++++++++++++++++----- + drivers/net/ethernet/mediatek/mtk_eth_soc.h | 12 ++- + 2 files changed, 78 insertions(+), 22 deletions(-) + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -1075,10 +1075,13 @@ static int mtk_init_fq_dma(struct mtk_et + dma_addr_t dma_addr; + int i; + +- eth->scratch_ring = dma_alloc_coherent(eth->dma_dev, +- cnt * soc->txrx.txd_size, +- ð->phy_scratch_ring, +- GFP_KERNEL); ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_SRAM)) ++ eth->scratch_ring = eth->sram_base; ++ else ++ eth->scratch_ring = dma_alloc_coherent(eth->dma_dev, ++ cnt * soc->txrx.txd_size, ++ ð->phy_scratch_ring, ++ GFP_KERNEL); + if (unlikely(!eth->scratch_ring)) + return -ENOMEM; + +@@ -2376,8 +2379,14 @@ static int mtk_tx_alloc(struct mtk_eth * + if (!ring->buf) + goto no_tx_mem; + +- ring->dma = dma_alloc_coherent(eth->dma_dev, ring_size * sz, +- &ring->phys, GFP_KERNEL); ++ if (MTK_HAS_CAPS(soc->caps, MTK_SRAM)) { ++ ring->dma = eth->sram_base + ring_size * sz; ++ ring->phys = eth->phy_scratch_ring + ring_size * (dma_addr_t)sz; ++ } else { ++ ring->dma = dma_alloc_coherent(eth->dma_dev, ring_size * sz, ++ &ring->phys, GFP_KERNEL); ++ } ++ + if (!ring->dma) + goto no_tx_mem; + +@@ -2476,8 +2485,7 @@ static void mtk_tx_clean(struct mtk_eth + kfree(ring->buf); + ring->buf = NULL; + } +- +- if (ring->dma) { ++ if (!MTK_HAS_CAPS(soc->caps, MTK_SRAM) && ring->dma) { + dma_free_coherent(eth->dma_dev, + ring->dma_size * soc->txrx.txd_size, + ring->dma, ring->phys); +@@ -2496,9 +2504,14 @@ static int mtk_rx_alloc(struct mtk_eth * + { + const struct mtk_reg_map *reg_map = eth->soc->reg_map; + struct mtk_rx_ring *ring; +- int rx_data_len, rx_dma_size; ++ int rx_data_len, rx_dma_size, tx_ring_size; + int i; + ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) ++ tx_ring_size = MTK_QDMA_RING_SIZE; ++ else ++ tx_ring_size = MTK_DMA_SIZE; ++ + if (rx_flag == MTK_RX_FLAGS_QDMA) { + if (ring_no) + return -EINVAL; +@@ -2533,9 +2546,20 @@ static int mtk_rx_alloc(struct mtk_eth * + ring->page_pool = pp; + } + +- ring->dma = dma_alloc_coherent(eth->dma_dev, +- rx_dma_size * eth->soc->txrx.rxd_size, +- &ring->phys, GFP_KERNEL); ++ if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SRAM) || ++ rx_flag != MTK_RX_FLAGS_NORMAL) { ++ ring->dma = dma_alloc_coherent(eth->dma_dev, ++ rx_dma_size * eth->soc->txrx.rxd_size, ++ &ring->phys, GFP_KERNEL); ++ } else { ++ struct mtk_tx_ring *tx_ring = ð->tx_ring; ++ ++ ring->dma = tx_ring->dma + tx_ring_size * ++ eth->soc->txrx.txd_size * (ring_no + 1); ++ ring->phys = tx_ring->phys + tx_ring_size * ++ eth->soc->txrx.txd_size * (ring_no + 1); ++ } ++ + if (!ring->dma) + return -ENOMEM; + +@@ -2618,7 +2642,7 @@ static int mtk_rx_alloc(struct mtk_eth * + return 0; + } + +-static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring) ++static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring, bool in_sram) + { + int i; + +@@ -2641,7 +2665,7 @@ static void mtk_rx_clean(struct mtk_eth + ring->data = NULL; + } + +- if (ring->dma) { ++ if (!in_sram && ring->dma) { + dma_free_coherent(eth->dma_dev, + ring->dma_size * eth->soc->txrx.rxd_size, + ring->dma, ring->phys); +@@ -3001,7 +3025,7 @@ static void mtk_dma_free(struct mtk_eth + for (i = 0; i < MTK_MAX_DEVS; i++) + if (eth->netdev[i]) + netdev_reset_queue(eth->netdev[i]); +- if (eth->scratch_ring) { ++ if (!MTK_HAS_CAPS(soc->caps, MTK_SRAM) && eth->scratch_ring) { + dma_free_coherent(eth->dma_dev, + MTK_QDMA_RING_SIZE * soc->txrx.txd_size, + eth->scratch_ring, eth->phy_scratch_ring); +@@ -3009,13 +3033,13 @@ static void mtk_dma_free(struct mtk_eth + eth->phy_scratch_ring = 0; + } + mtk_tx_clean(eth); +- mtk_rx_clean(eth, ð->rx_ring[0]); +- mtk_rx_clean(eth, ð->rx_ring_qdma); ++ mtk_rx_clean(eth, ð->rx_ring[0], MTK_HAS_CAPS(soc->caps, MTK_SRAM)); ++ mtk_rx_clean(eth, ð->rx_ring_qdma, false); + + if (eth->hwlro) { + mtk_hwlro_rx_uninit(eth); + for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) +- mtk_rx_clean(eth, ð->rx_ring[i]); ++ mtk_rx_clean(eth, ð->rx_ring[i], false); + } + + kfree(eth->scratch_head); +@@ -4585,7 +4609,7 @@ static int mtk_sgmii_init(struct mtk_eth + + static int mtk_probe(struct platform_device *pdev) + { +- struct resource *res = NULL; ++ struct resource *res = NULL, *res_sram; + struct device_node *mac_np; + struct mtk_eth *eth; + int err, i; +@@ -4605,6 +4629,20 @@ static int mtk_probe(struct platform_dev + if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) + eth->ip_align = NET_IP_ALIGN; + ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_SRAM)) { ++ /* SRAM is actual memory and supports transparent access just like DRAM. ++ * Hence we don't require __iomem being set and don't need to use accessor ++ * functions to read from or write to SRAM. ++ */ ++ if (mtk_is_netsys_v3_or_greater(eth)) { ++ eth->sram_base = (void __force *)devm_platform_ioremap_resource(pdev, 1); ++ if (IS_ERR(eth->sram_base)) ++ return PTR_ERR(eth->sram_base); ++ } else { ++ eth->sram_base = (void __force *)eth->base + MTK_ETH_SRAM_OFFSET; ++ } ++ } ++ + spin_lock_init(ð->page_lock); + spin_lock_init(ð->tx_irq_lock); + spin_lock_init(ð->rx_irq_lock); +@@ -4668,6 +4706,18 @@ static int mtk_probe(struct platform_dev + err = -EINVAL; + goto err_destroy_sgmii; + } ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_SRAM)) { ++ if (mtk_is_netsys_v3_or_greater(eth)) { ++ res_sram = platform_get_resource(pdev, IORESOURCE_MEM, 1); ++ if (!res_sram) { ++ err = -EINVAL; ++ goto err_destroy_sgmii; ++ } ++ eth->phy_scratch_ring = res_sram->start; ++ } else { ++ eth->phy_scratch_ring = res->start + MTK_ETH_SRAM_OFFSET; ++ } ++ } + } + + if (eth->soc->offload_version) { +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h +@@ -139,6 +139,9 @@ + #define MTK_GDMA_MAC_ADRH(x) ({ typeof(x) _x = (x); (_x == MTK_GMAC3_ID) ? \ + 0x54C : 0x50C + (_x * 0x1000); }) + ++/* Internal SRAM offset */ ++#define MTK_ETH_SRAM_OFFSET 0x40000 ++ + /* FE global misc reg*/ + #define MTK_FE_GLO_MISC 0x124 + +@@ -935,6 +938,7 @@ enum mkt_eth_capabilities { + MTK_RSTCTRL_PPE1_BIT, + MTK_RSTCTRL_PPE2_BIT, + MTK_U3_COPHY_V2_BIT, ++ MTK_SRAM_BIT, + + /* MUX BITS*/ + MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT, +@@ -970,6 +974,7 @@ enum mkt_eth_capabilities { + #define MTK_RSTCTRL_PPE1 BIT_ULL(MTK_RSTCTRL_PPE1_BIT) + #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_ETH_MUX_GDM1_TO_GMAC1_ESW \ + BIT_ULL(MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT) +@@ -1045,14 +1050,14 @@ enum mkt_eth_capabilities { + #define MT7981_CAPS (MTK_GMAC1_SGMII | MTK_GMAC2_SGMII | MTK_GMAC2_GEPHY | \ + MTK_MUX_GMAC12_TO_GEPHY_SGMII | MTK_QDMA | \ + MTK_MUX_U3_GMAC2_TO_QPHY | MTK_U3_COPHY_V2 | \ +- MTK_RSTCTRL_PPE1) ++ MTK_RSTCTRL_PPE1 | MTK_SRAM) + + #define MT7986_CAPS (MTK_GMAC1_SGMII | MTK_GMAC2_SGMII | \ + MTK_MUX_GMAC12_TO_GEPHY_SGMII | MTK_QDMA | \ +- MTK_RSTCTRL_PPE1) ++ MTK_RSTCTRL_PPE1 | MTK_SRAM) + + #define MT7988_CAPS (MTK_GDM1_ESW | MTK_QDMA | MTK_RSTCTRL_PPE1 | \ +- MTK_RSTCTRL_PPE2) ++ MTK_RSTCTRL_PPE2 | MTK_SRAM) + + struct mtk_tx_dma_desc_info { + dma_addr_t addr; +@@ -1212,6 +1217,7 @@ struct mtk_eth { + struct device *dev; + struct device *dma_dev; + void __iomem *base; ++ void *sram_base; + spinlock_t page_lock; + spinlock_t tx_irq_lock; + spinlock_t rx_irq_lock; |