RE: [PATCH net-next v10 2/2] net: ethernet: Add driver for Sunplus SP7021
flat view
From: Wells Lu 呂芳騰 <hidden>
Date: 2022-05-06 03:01:17
Also in:
linux-devicetree, lkml
Hi Paolo,
On Mon, 2022-05-02 at 21:23 +0800, Wells Lu wrote:quoted
Add driver for Sunplus SP7021 SoC. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Wells Lu <wellslutw@gmail.com> --- Changes in v10 - Addressed comments of Mr. Stephen Hemminger. - Use define NAPI_POLL_WEIGHT. - Return amount of processed packets in spl2sw_tx_poll() and spl2sw_rx_poll(). - Addressed comments of Mr. Francois Romien. - Added spin locks for "read-modify-write of int-mask register". MAINTAINERS | 1 + drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/sunplus/Kconfig | 35 ++ drivers/net/ethernet/sunplus/Makefile | 6 + drivers/net/ethernet/sunplus/spl2sw_define.h | 270 ++++++++ drivers/net/ethernet/sunplus/spl2sw_desc.c | 228 +++++++ drivers/net/ethernet/sunplus/spl2sw_desc.h | 19 + drivers/net/ethernet/sunplus/spl2sw_driver.c | 578 ++++++++++++++++++ drivers/net/ethernet/sunplus/spl2sw_int.c | 273 +++++++++ drivers/net/ethernet/sunplus/spl2sw_int.h | 13 + drivers/net/ethernet/sunplus/spl2sw_mac.c | 274 +++++++++ drivers/net/ethernet/sunplus/spl2sw_mac.h | 18 + drivers/net/ethernet/sunplus/spl2sw_mdio.c | 126 ++++ drivers/net/ethernet/sunplus/spl2sw_mdio.h | 12 + drivers/net/ethernet/sunplus/spl2sw_phy.c | 92 +++ drivers/net/ethernet/sunplus/spl2sw_phy.h | 12 + .../net/ethernet/sunplus/spl2sw_register.h | 86 +++ 18 files changed, 2045 insertions(+) create mode 100644 drivers/net/ethernet/sunplus/Kconfig create mode 100644 drivers/net/ethernet/sunplus/Makefile create mode 100644 drivers/net/ethernet/sunplus/spl2sw_define.h create mode 100644 drivers/net/ethernet/sunplus/spl2sw_desc.c create mode 100644 drivers/net/ethernet/sunplus/spl2sw_desc.h create mode 100644 drivers/net/ethernet/sunplus/spl2sw_driver.c create mode 100644 drivers/net/ethernet/sunplus/spl2sw_int.c create mode 100644 drivers/net/ethernet/sunplus/spl2sw_int.h create mode 100644 drivers/net/ethernet/sunplus/spl2sw_mac.c create mode 100644 drivers/net/ethernet/sunplus/spl2sw_mac.h create mode 100644 drivers/net/ethernet/sunplus/spl2sw_mdio.c create mode 100644 drivers/net/ethernet/sunplus/spl2sw_mdio.h create mode 100644 drivers/net/ethernet/sunplus/spl2sw_phy.c create mode 100644 drivers/net/ethernet/sunplus/spl2sw_phy.h create mode 100644 drivers/net/ethernet/sunplus/spl2sw_register.hdiff --git a/MAINTAINERS b/MAINTAINERS index 22a2f9699..11a062c42100644--- a/MAINTAINERS +++ b/MAINTAINERS@@ -18890,6 +18890,7 @@ L: netdev@vger.kernel.org S: Maintained W: https://sunplus.atlassian.net/wiki/spaces/doc/overview F: Documentation/devicetree/bindings/net/sunplus,sp7021-emac.yaml +F: drivers/net/ethernet/sunplus/ SUNPLUS OCOTP DRIVER M: Vincent Shih <vincent.sunplus@gmail.com>diff --git a/drivers/net/ethernet/Kconfigb/drivers/net/ethernet/Kconfig index 827993022..955abbc54 100644--- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig@@ -179,6 +179,7 @@ source "drivers/net/ethernet/smsc/Kconfig" source "drivers/net/ethernet/socionext/Kconfig" source "drivers/net/ethernet/stmicro/Kconfig" source "drivers/net/ethernet/sun/Kconfig" +source "drivers/net/ethernet/sunplus/Kconfig" source "drivers/net/ethernet/synopsys/Kconfig" source "drivers/net/ethernet/tehuti/Kconfig" source "drivers/net/ethernet/ti/Kconfig"diff --git a/drivers/net/ethernet/Makefileb/drivers/net/ethernet/Makefile index 8ef43e0c3..9eb011699 100644--- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile@@ -90,6 +90,7 @@ obj-$(CONFIG_NET_VENDOR_SMSC) += smsc/ obj-$(CONFIG_NET_VENDOR_SOCIONEXT) += socionext/ obj-$(CONFIG_NET_VENDOR_STMICRO) += stmicro/ obj-$(CONFIG_NET_VENDOR_SUN) += sun/ +obj-$(CONFIG_NET_VENDOR_SUNPLUS) += sunplus/ obj-$(CONFIG_NET_VENDOR_TEHUTI) += tehuti/ obj-$(CONFIG_NET_VENDOR_TI) += ti/ obj-$(CONFIG_NET_VENDOR_TOSHIBA) += toshiba/ diff --gita/drivers/net/ethernet/sunplus/Kconfig b/drivers/net/ethernet/sunplus/Kconfig new file mode 100644 index 000000000..d0144a2ab--- /dev/null +++ b/drivers/net/ethernet/sunplus/Kconfig@@ -0,0 +1,35 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Sunplus network device configuration # + +config NET_VENDOR_SUNPLUS + bool "Sunplus devices" + default y + depends on ARCH_SUNPLUS || COMPILE_TEST + help + If you have a network (Ethernet) card belonging to this + class, say Y here. + + Note that the answer to this question doesn't directly + affect the kernel: saying N will just cause the configurator + to skip all the questions about Sunplus cards. If you say Y, + you will be asked for your specific card in the following + questions. + +if NET_VENDOR_SUNPLUS + +config SP7021_EMAC + tristate "Sunplus Dual 10M/100M Ethernet devices" + depends on SOC_SP7021 || COMPILE_TEST + select PHYLIB + select COMMON_CLK_SP7021 + select RESET_SUNPLUS + select NVMEM_SUNPLUS_OCOTP + help + If you have Sunplus dual 10M/100M Ethernet devices, say Y. + The network device creates two net-device interfaces. + To compile this driver as a module, choose M here. The + module will be called sp7021_emac. + +endif # NET_VENDOR_SUNPLUSdiff --git a/drivers/net/ethernet/sunplus/Makefileb/drivers/net/ethernet/sunplus/Makefile new file mode 100644 index 000000000..ef7d7d0a7--- /dev/null +++ b/drivers/net/ethernet/sunplus/Makefile@@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Sunplus network device drivers. +# +obj-$(CONFIG_SP7021_EMAC) += sp7021_emac.o sp7021_emac-objs := +spl2sw_driver.o spl2sw_int.o spl2sw_desc.o spl2sw_mac.o spl2sw_mdio.o +spl2sw_phy.odiff --git a/drivers/net/ethernet/sunplus/spl2sw_define.hb/drivers/net/ethernet/sunplus/spl2sw_define.h new file mode 100644 index 000000000..acc6c1228--- /dev/null +++ b/drivers/net/ethernet/sunplus/spl2sw_define.h@@ -0,0 +1,270 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright Sunplus Technology Co., Ltd. + * All rights reserved. + */ + +#ifndef __SPL2SW_DEFINE_H__ +#define __SPL2SW_DEFINE_H__ + +#define MAX_NETDEV_NUM 2 /* Maximum # of net-device */ + +/* Interrupt status */ +#define MAC_INT_DAISY_MODE_CHG BIT(31) /* Daisy Mode Change */ +#define MAC_INT_IP_CHKSUM_ERR BIT(23) /* IP Checksum Append Error */ +#define MAC_INT_WDOG_TIMER1_EXP BIT(22) /* Watchdog Timer1 Expired */ +#define MAC_INT_WDOG_TIMER0_EXP BIT(21) /* Watchdog Timer0 Expired */ +#define MAC_INT_INTRUDER_ALERT BIT(20) /* Atruder Alert */ +#define MAC_INT_PORT_ST_CHG BIT(19) /* Port Status Change */ +#define MAC_INT_BC_STORM BIT(18) /* Broad Cast Storm */ +#define MAC_INT_MUST_DROP_LAN BIT(17) /* Global Queue Exhausted */ +#define MAC_INT_GLOBAL_QUE_FULL BIT(16) /* Global Queue Full */ +#define MAC_INT_TX_SOC_PAUSE_ON BIT(15) /* Soc Port TX Pause On */ +#define MAC_INT_RX_SOC_QUE_FULL BIT(14) /* Soc Port Out Queue Full */ +#define MAC_INT_TX_LAN1_QUE_FULL BIT(9) /* Port 1 Out Queue Full */ +#define MAC_INT_TX_LAN0_QUE_FULL BIT(8) /* Port 0 Out Queue Full */ +#define MAC_INT_RX_L_DESCF BIT(7) /* Low Priority Descriptor Full */ +#define MAC_INT_RX_H_DESCF BIT(6) /* High Priority Descriptor Full */ +#define MAC_INT_RX_DONE_L BIT(5) /* RX Low Priority Done */ +#define MAC_INT_RX_DONE_H BIT(4) /* RX High Priority Done */ +#define MAC_INT_TX_DONE_L BIT(3) /* TX Low Priority Done */ +#define MAC_INT_TX_DONE_H BIT(2) /* TX High Priority Done */ +#define MAC_INT_TX_DES_ERR BIT(1) /* TX Descriptor Error */ +#define MAC_INT_RX_DES_ERR BIT(0) /* Rx Descriptor Error */ + +#define MAC_INT_RX (MAC_INT_RX_DONE_H | MAC_INT_RX_DONE_L | \ + MAC_INT_RX_DES_ERR) +#define MAC_INT_TX (MAC_INT_TX_DONE_L | MAC_INT_TX_DONE_H | \ + MAC_INT_TX_DES_ERR) +#define MAC_INT_MASK_DEF (MAC_INT_DAISY_MODE_CHG | MAC_INT_IP_CHKSUM_ERR | \ + MAC_INT_WDOG_TIMER1_EXP | MAC_INT_WDOG_TIMER0_EXP | \ + MAC_INT_INTRUDER_ALERT | MAC_INT_PORT_ST_CHG | \ + MAC_INT_BC_STORM | MAC_INT_MUST_DROP_LAN | \ + MAC_INT_GLOBAL_QUE_FULL | MAC_INT_TX_SOC_PAUSE_ON | \ + MAC_INT_RX_SOC_QUE_FULL | MAC_INT_TX_LAN1_QUE_FULL | \ + MAC_INT_TX_LAN0_QUE_FULL | MAC_INT_RX_L_DESCF | \ + MAC_INT_RX_H_DESCF) + +/* Address table search */ +#define MAC_ADDR_LOOKUP_IDLE BIT(2) +#define MAC_SEARCH_NEXT_ADDR BIT(1) +#define MAC_BEGIN_SEARCH_ADDR BIT(0) + +/* Address table status */ +#define MAC_HASH_LOOKUP_ADDR GENMASK(31, 22) +#define MAC_R_PORT_MAP GENMASK(13, 12) +#define MAC_R_CPU_PORT GENMASK(11, 10) +#define MAC_R_VID GENMASK(9, 7) +#define MAC_R_AGE GENMASK(6, 4) +#define MAC_R_PROXY BIT(3) +#define MAC_R_MC_INGRESS BIT(2) +#define MAC_AT_TABLE_END BIT(1) +#define MAC_AT_DATA_READY BIT(0) + +/* Wt mac ad0 */ +#define MAC_W_PORT_MAP GENMASK(13, 12) +#define MAC_W_LAN_PORT_1 BIT(13) +#define MAC_W_LAN_PORT_0 BIT(12) +#define MAC_W_CPU_PORT GENMASK(11, 10) +#define MAC_W_CPU_PORT_1 BIT(11) +#define MAC_W_CPU_PORT_0 BIT(10) +#define MAC_W_VID GENMASK(9, 7) +#define MAC_W_AGE GENMASK(6, 4) +#define MAC_W_PROXY BIT(3) +#define MAC_W_MC_INGRESS BIT(2) +#define MAC_W_MAC_DONE BIT(1) +#define MAC_W_MAC_CMD BIT(0) + +/* W mac 15_0 bus */ +#define MAC_W_MAC_15_0 GENMASK(15, 0) + +/* W mac 47_16 bus */ +#define MAC_W_MAC_47_16 GENMASK(31, 0) + +/* PVID config 0 */ +#define MAC_P1_PVID GENMASK(6, 4) +#define MAC_P0_PVID GENMASK(2, 0) + +/* VLAN member config 0 */ +#define MAC_VLAN_MEMSET_3 GENMASK(27, 24) +#define MAC_VLAN_MEMSET_2 GENMASK(19, 16) +#define MAC_VLAN_MEMSET_1 GENMASK(11, 8) +#define MAC_VLAN_MEMSET_0 GENMASK(3, 0) + +/* VLAN member config 1 */ +#define MAC_VLAN_MEMSET_5 GENMASK(11, 8) +#define MAC_VLAN_MEMSET_4 GENMASK(3, 0) + +/* Port ability */ +#define MAC_PORT_ABILITY_LINK_ST GENMASK(25, 24) + +/* CPU control */ +#define MAC_EN_SOC1_AGING BIT(15) +#define MAC_EN_SOC0_AGING BIT(14) +#define MAC_DIS_LRN_SOC1 BIT(13) +#define MAC_DIS_LRN_SOC0 BIT(12) +#define MAC_EN_CRC_SOC1 BIT(9) +#define MAC_EN_CRC_SOC0 BIT(8) +#define MAC_DIS_SOC1_CPU BIT(7) +#define MAC_DIS_SOC0_CPU BIT(6) +#define MAC_DIS_BC2CPU_P1 BIT(5) +#define MAC_DIS_BC2CPU_P0 BIT(4) +#define MAC_DIS_MC2CPU GENMASK(3, 2) +#define MAC_DIS_MC2CPU_P1 BIT(3) +#define MAC_DIS_MC2CPU_P0 BIT(2) +#define MAC_DIS_UN2CPU GENMASK(1, 0) + +/* Port control 0 */ +#define MAC_DIS_PORT GENMASK(25, 24) +#define MAC_DIS_PORT1 BIT(25) +#define MAC_DIS_PORT0 BIT(24) +#define MAC_DIS_RMC2CPU_P1 BIT(17) +#define MAC_DIS_RMC2CPU_P0 BIT(16) +#define MAC_EN_FLOW_CTL_P1 BIT(9) +#define MAC_EN_FLOW_CTL_P0 BIT(8) +#define MAC_EN_BACK_PRESS_P1 BIT(1) +#define MAC_EN_BACK_PRESS_P0 BIT(0) + +/* Port control 1 */ +#define MAC_DIS_SA_LRN_P1 BIT(9) +#define MAC_DIS_SA_LRN_P0 BIT(8) + +/* Port control 2 */ +#define MAC_EN_AGING_P1 BIT(9) +#define MAC_EN_AGING_P0 BIT(8) + +/* Switch Global control */ +#define MAC_RMC_TB_FAULT_RULE GENMASK(26, 25) +#define MAC_LED_FLASH_TIME GENMASK(24, 23) +#define MAC_BC_STORM_PREV GENMASK(5, 4) + +/* LED port 0 */ +#define MAC_LED_ACT_HI BIT(28) + +/* PHY control register 0 */ +#define MAC_CPU_PHY_WT_DATA GENMASK(31, 16) +#define MAC_CPU_PHY_CMD GENMASK(14, 13) +#define MAC_CPU_PHY_REG_ADDR GENMASK(12, 8) +#define MAC_CPU_PHY_ADDR GENMASK(4, 0) + +/* PHY control register 1 */ +#define MAC_CPU_PHY_RD_DATA GENMASK(31, 16) +#define MAC_PHY_RD_RDY BIT(1) +#define MAC_PHY_WT_DONE BIT(0) + +/* MAC force mode */ +#define MAC_EXT_PHY1_ADDR GENMASK(28, 24) +#define MAC_EXT_PHY0_ADDR GENMASK(20, 16) +#define MAC_FORCE_RMII_LINK GENMASK(9, 8) +#define MAC_FORCE_RMII_EN_1 BIT(7) +#define MAC_FORCE_RMII_EN_0 BIT(6) +#define MAC_FORCE_RMII_FC GENMASK(5, 4) +#define MAC_FORCE_RMII_DPX GENMASK(3, 2) +#define MAC_FORCE_RMII_SPD GENMASK(1, 0) + +/* CPU transmit trigger */ +#define MAC_TRIG_L_SOC0 BIT(1) +#define MAC_TRIG_H_SOC0 BIT(0) + +/* Config descriptor queue */ +#define TX_DESC_NUM 16 /* # of descriptors in TX queue */ +#define MAC_GUARD_DESC_NUM 2 /* # of descriptors of gap 0 */ +#define RX_QUEUE0_DESC_NUM 16 /* # of descriptors in RX queue 0 */ +#define RX_QUEUE1_DESC_NUM 16 /* # of descriptors in RX queue 1 */ +#define TX_DESC_QUEUE_NUM 1 /* # of TX queue */ +#define RX_DESC_QUEUE_NUM 2 /* # of RX queue */ + +#define MAC_RX_LEN_MAX 2047 /* Size of RX buffer */ + +/* Tx descriptor */ +/* cmd1 */ +#define TXD_OWN BIT(31) +#define TXD_ERR_CODE GENMASK(29, 26) +#define TXD_SOP BIT(25) /* start of a packet */ +#define TXD_EOP BIT(24) /* end of a packet */ +#define TXD_VLAN GENMASK(17, 12) +#define TXD_PKT_LEN GENMASK(10, 0) /* packet length */ +/* cmd2 */ +#define TXD_EOR BIT(31) /* end of ring */ +#define TXD_BUF_LEN2 GENMASK(22, 12) +#define TXD_BUF_LEN1 GENMASK(10, 0) + +/* Rx descriptor */ +/* cmd1 */ +#define RXD_OWN BIT(31) +#define RXD_ERR_CODE GENMASK(29, 26) +#define RXD_TCP_UDP_CHKSUM BIT(23) +#define RXD_PROXY BIT(22) +#define RXD_PROTOCOL GENMASK(21, 20) +#define RXD_VLAN_TAG BIT(19) +#define RXD_IP_CHKSUM BIT(18) +#define RXD_ROUTE_TYPE GENMASK(17, 16) +#define RXD_PKT_SP GENMASK(14, 12) /* packet source port */ +#define RXD_PKT_LEN GENMASK(10, 0) /* packet length */ +/* cmd2 */ +#define RXD_EOR BIT(31) /* end of ring */ +#define RXD_BUF_LEN2 GENMASK(22, 12) +#define RXD_BUF_LEN1 GENMASK(10, 0) + +/* structure of descriptor */ +struct spl2sw_mac_desc { + u32 cmd1; + u32 cmd2; + u32 addr1; + u32 addr2; +}; + +struct spl2sw_skb_info { + struct sk_buff *skb; + u32 mapping; + u32 len; +}; + +struct spl2sw_common { + void __iomem *l2sw_reg_base; + + struct platform_device *pdev; + struct reset_control *rstc; + struct clk *clk; + + void *desc_base; + dma_addr_t desc_dma; + s32 desc_size; + struct spl2sw_mac_desc *rx_desc[RX_DESC_QUEUE_NUM]; + struct spl2sw_skb_info *rx_skb_info[RX_DESC_QUEUE_NUM]; + u32 rx_pos[RX_DESC_QUEUE_NUM]; + u32 rx_desc_num[RX_DESC_QUEUE_NUM]; + u32 rx_desc_buff_size; + + struct spl2sw_mac_desc *tx_desc; + struct spl2sw_skb_info tx_temp_skb_info[TX_DESC_NUM]; + u32 tx_done_pos; + u32 tx_pos; + u32 tx_desc_full; + + struct net_device *ndev[MAX_NETDEV_NUM]; + struct mii_bus *mii_bus; + + struct napi_struct rx_napi; + struct napi_struct tx_napi; + + spinlock_t tx_lock; /* spinlock for accessing tx buffer */ + spinlock_t mdio_lock; /* spinlock for mdio commands */ + spinlock_t int_mask_lock; /* spinlock for accessing int mask reg. */ + + u8 enable; +}; + +struct spl2sw_mac { + struct net_device *ndev; + struct spl2sw_common *comm; + + u8 mac_addr[ETH_ALEN]; + phy_interface_t phy_mode; + struct device_node *phy_node; + + u8 lan_port; + u8 to_vlan; + u8 vlan_id; +}; + +#endifdiff --git a/drivers/net/ethernet/sunplus/spl2sw_desc.cb/drivers/net/ethernet/sunplus/spl2sw_desc.c new file mode 100644 index 000000000..3f0d9f78b--- /dev/null +++ b/drivers/net/ethernet/sunplus/spl2sw_desc.c@@ -0,0 +1,228 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright Sunplus Technology Co., Ltd. + * All rights reserved. + */ + +#include <linux/platform_device.h> +#include <linux/netdevice.h> +#include <linux/of_mdio.h> + +#include "spl2sw_define.h" +#include "spl2sw_desc.h" + +void spl2sw_rx_descs_flush(struct spl2sw_common *comm) { + struct spl2sw_skb_info *rx_skbinfo; + struct spl2sw_mac_desc *rx_desc; + u32 i, j; + + for (i = 0; i < RX_DESC_QUEUE_NUM; i++) { + rx_desc = comm->rx_desc[i]; + rx_skbinfo = comm->rx_skb_info[i]; + for (j = 0; j < comm->rx_desc_num[i]; j++) { + rx_desc[j].addr1 = rx_skbinfo[j].mapping; + rx_desc[j].cmd2 = (j == comm->rx_desc_num[i] - 1) ? + RXD_EOR | comm->rx_desc_buff_size : + comm->rx_desc_buff_size; + wmb(); /* Set RXD_OWN after other fields are ready. */ + rx_desc[j].cmd1 = RXD_OWN; + } + } +} + +void spl2sw_tx_descs_clean(struct spl2sw_common *comm) { + u32 i; + + if (!comm->tx_desc) + return; + + for (i = 0; i < TX_DESC_NUM; i++) { + comm->tx_desc[i].cmd1 = 0; + wmb(); /* Clear TXD_OWN and then set other fields. */ + comm->tx_desc[i].cmd2 = 0; + comm->tx_desc[i].addr1 = 0; + comm->tx_desc[i].addr2 = 0; + + if (comm->tx_temp_skb_info[i].mapping) { + dma_unmap_single(&comm->pdev->dev, comm->tx_temp_skb_info[i].mapping, + comm->tx_temp_skb_info[i].skb->len, DMA_TO_DEVICE); + comm->tx_temp_skb_info[i].mapping = 0; + } + + if (comm->tx_temp_skb_info[i].skb) { + dev_kfree_skb_any(comm->tx_temp_skb_info[i].skb); + comm->tx_temp_skb_info[i].skb = NULL; + } + } +} + +void spl2sw_rx_descs_clean(struct spl2sw_common *comm) { + struct spl2sw_skb_info *rx_skbinfo; + struct spl2sw_mac_desc *rx_desc; + u32 i, j; + + for (i = 0; i < RX_DESC_QUEUE_NUM; i++) { + if (!comm->rx_skb_info[i]) + continue; + + rx_desc = comm->rx_desc[i]; + rx_skbinfo = comm->rx_skb_info[i]; + for (j = 0; j < comm->rx_desc_num[i]; j++) { + rx_desc[j].cmd1 = 0; + wmb(); /* Clear RXD_OWN and then set other fields. */ + rx_desc[j].cmd2 = 0; + rx_desc[j].addr1 = 0; + + if (rx_skbinfo[j].skb) { + dma_unmap_single(&comm->pdev->dev, rx_skbinfo[j].mapping, + comm->rx_desc_buff_size, DMA_FROM_DEVICE); + dev_kfree_skb_any(rx_skbinfo[j].skb); + rx_skbinfo[j].skb = NULL; + rx_skbinfo[j].mapping = 0; + } + } + + kfree(rx_skbinfo); + comm->rx_skb_info[i] = NULL; + } +} + +void spl2sw_descs_clean(struct spl2sw_common *comm) { + spl2sw_rx_descs_clean(comm); + spl2sw_tx_descs_clean(comm); +} + +void spl2sw_descs_free(struct spl2sw_common *comm) { + u32 i; + + spl2sw_descs_clean(comm); + comm->tx_desc = NULL; + for (i = 0; i < RX_DESC_QUEUE_NUM; i++) + comm->rx_desc[i] = NULL; + + /* Free descriptor area */ + if (comm->desc_base) { + dma_free_coherent(&comm->pdev->dev, comm->desc_size, comm->desc_base, + comm->desc_dma); + comm->desc_base = NULL; + comm->desc_dma = 0; + comm->desc_size = 0; + } +} + +void spl2sw_tx_descs_init(struct spl2sw_common *comm) { + memset(comm->tx_desc, '\0', sizeof(struct spl2sw_mac_desc) * + (TX_DESC_NUM + MAC_GUARD_DESC_NUM)); } + +int spl2sw_rx_descs_init(struct spl2sw_common *comm) { + struct spl2sw_skb_info *rx_skbinfo; + struct spl2sw_mac_desc *rx_desc; + struct sk_buff *skb; + u32 mapping; + u32 i, j; + + for (i = 0; i < RX_DESC_QUEUE_NUM; i++) { + comm->rx_skb_info[i] = kcalloc(comm->rx_desc_num[i], sizeof(*rx_skbinfo), + GFP_KERNEL | GFP_DMA); + if (!comm->rx_skb_info[i]) + goto mem_alloc_fail; + + rx_skbinfo = comm->rx_skb_info[i]; + rx_desc = comm->rx_desc[i]; + for (j = 0; j < comm->rx_desc_num[i]; j++) { + skb = netdev_alloc_skb(NULL, comm->rx_desc_buff_size); + if (!skb) + goto mem_alloc_fail; + + rx_skbinfo[j].skb = skb; + mapping = dma_map_single(&comm->pdev->dev, skb->data, + comm->rx_desc_buff_size, + DMA_FROM_DEVICE); + if (dma_mapping_error(&comm->pdev->dev, mapping)) + goto mem_alloc_fail; + + rx_skbinfo[j].mapping = mapping; + rx_desc[j].addr1 = mapping; + rx_desc[j].addr2 = 0; + rx_desc[j].cmd2 = (j == comm->rx_desc_num[i] - 1) ? + RXD_EOR | comm->rx_desc_buff_size : + comm->rx_desc_buff_size; + wmb(); /* Set RXD_OWN after other fields are effective. */ + rx_desc[j].cmd1 = RXD_OWN; + } + } + + return 0; + +mem_alloc_fail: + spl2sw_rx_descs_clean(comm); + return -ENOMEM; +} + +int spl2sw_descs_alloc(struct spl2sw_common *comm) { + s32 desc_size; + u32 i; + + /* Alloc descriptor area */ + desc_size = (TX_DESC_NUM + MAC_GUARD_DESC_NUM) * sizeof(struct spl2sw_mac_desc); + for (i = 0; i < RX_DESC_QUEUE_NUM; i++) + desc_size += comm->rx_desc_num[i] * sizeof(struct spl2sw_mac_desc); + + comm->desc_base = dma_alloc_coherent(&comm->pdev->dev, desc_size,&comm->desc_dma,quoted
+ GFP_KERNEL); + if (!comm->desc_base) + return -ENOMEM; + + comm->desc_size = desc_size; + + /* Setup Tx descriptor */ + comm->tx_desc = comm->desc_base; + + /* Setup Rx descriptor */ + comm->rx_desc[0] = &comm->tx_desc[TX_DESC_NUM + MAC_GUARD_DESC_NUM]; + for (i = 1; i < RX_DESC_QUEUE_NUM; i++) + comm->rx_desc[i] = comm->rx_desc[i - 1] + comm->rx_desc_num[i - 1]; + + return 0; +} + +int spl2sw_descs_init(struct spl2sw_common *comm) { + u32 i, ret; + + /* Initialize rx descriptor's data */ + comm->rx_desc_num[0] = RX_QUEUE0_DESC_NUM; + comm->rx_desc_num[1] = RX_QUEUE1_DESC_NUM; + + for (i = 0; i < RX_DESC_QUEUE_NUM; i++) { + comm->rx_desc[i] = NULL; + comm->rx_skb_info[i] = NULL; + comm->rx_pos[i] = 0; + } + comm->rx_desc_buff_size = MAC_RX_LEN_MAX; + + /* Initialize tx descriptor's data */ + comm->tx_done_pos = 0; + comm->tx_desc = NULL; + comm->tx_pos = 0; + comm->tx_desc_full = 0; + for (i = 0; i < TX_DESC_NUM; i++) + comm->tx_temp_skb_info[i].skb = NULL; + + /* Allocate tx & rx descriptors. */ + ret = spl2sw_descs_alloc(comm); + if (ret) + return ret; + + spl2sw_tx_descs_init(comm); + + return spl2sw_rx_descs_init(comm); +}diff --git a/drivers/net/ethernet/sunplus/spl2sw_desc.hb/drivers/net/ethernet/sunplus/spl2sw_desc.h new file mode 100644 index 000000000..f04e2d85c--- /dev/null +++ b/drivers/net/ethernet/sunplus/spl2sw_desc.h@@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright Sunplus Technology Co., Ltd. + * All rights reserved. + */ + +#ifndef __SPL2SW_DESC_H__ +#define __SPL2SW_DESC_H__ + +void spl2sw_rx_descs_flush(struct spl2sw_common *comm); void +spl2sw_tx_descs_clean(struct spl2sw_common *comm); void +spl2sw_rx_descs_clean(struct spl2sw_common *comm); void +spl2sw_descs_clean(struct spl2sw_common *comm); void +spl2sw_descs_free(struct spl2sw_common *comm); void +spl2sw_tx_descs_init(struct spl2sw_common *comm); int +spl2sw_rx_descs_init(struct spl2sw_common *comm); int +spl2sw_descs_alloc(struct spl2sw_common *comm); int +spl2sw_descs_init(struct spl2sw_common *comm); + +#endifdiff --git a/drivers/net/ethernet/sunplus/spl2sw_driver.cb/drivers/net/ethernet/sunplus/spl2sw_driver.c new file mode 100644 index 000000000..8320fa833--- /dev/null +++ b/drivers/net/ethernet/sunplus/spl2sw_driver.c@@ -0,0 +1,578 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright Sunplus Technology Co., Ltd. + * All rights reserved. + */ + +#include <linux/platform_device.h> +#include <linux/nvmem-consumer.h> +#include <linux/etherdevice.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <linux/of_net.h> +#include <linux/reset.h> +#include <linux/clk.h> +#include <linux/of.h> + +#include "spl2sw_register.h" +#include "spl2sw_define.h" +#include "spl2sw_desc.h" +#include "spl2sw_mdio.h" +#include "spl2sw_phy.h" +#include "spl2sw_int.h" +#include "spl2sw_mac.h" + +/* net device operations */ +static int spl2sw_ethernet_open(struct net_device *ndev) { + struct spl2sw_mac *mac = netdev_priv(ndev); + struct spl2sw_common *comm = mac->comm; + u32 mask; + + netdev_dbg(ndev, "Open port = %x\n", mac->lan_port); + + comm->enable |= mac->lan_port; + + spl2sw_mac_hw_start(comm); + + /* Enable TX and RX interrupts */ + mask = readl(comm->l2sw_reg_base + L2SW_SW_INT_MASK_0); + mask &= ~(MAC_INT_TX | MAC_INT_RX); + writel(mask, comm->l2sw_reg_base + L2SW_SW_INT_MASK_0); + + phy_start(ndev->phydev); + + netif_start_queue(ndev); + + return 0; +} + +static int spl2sw_ethernet_stop(struct net_device *ndev) { + struct spl2sw_mac *mac = netdev_priv(ndev); + struct spl2sw_common *comm = mac->comm; + + netif_stop_queue(ndev); + + comm->enable &= ~mac->lan_port; + + phy_stop(ndev->phydev); + + spl2sw_mac_hw_stop(comm); + + return 0; +} + +static int spl2sw_ethernet_start_xmit(struct sk_buff *skb, struct +net_device *ndev) { + struct spl2sw_mac *mac = netdev_priv(ndev); + struct spl2sw_common *comm = mac->comm; + struct spl2sw_skb_info *skbinfo; + struct spl2sw_mac_desc *txdesc; + unsigned long flags; + u32 mapping; + u32 tx_pos; + u32 cmd1; + u32 cmd2; + + if (unlikely(comm->tx_desc_full == 1)) { + /* No TX descriptors left. Wait for tx interrupt. */ + netdev_dbg(ndev, "TX descriptor queue full when xmit!\n"); + return NETDEV_TX_BUSY; + } + + /* If skb size is shorter than ETH_ZLEN (60), pad it with 0. */ + if (unlikely(skb->len < ETH_ZLEN)) { + if (skb_padto(skb, ETH_ZLEN)) + return NETDEV_TX_OK; + + skb_put(skb, ETH_ZLEN - skb->len); + } + + mapping = dma_map_single(&comm->pdev->dev, skb->data, + skb->len, DMA_TO_DEVICE); + if (dma_mapping_error(&comm->pdev->dev, mapping)) { + ndev->stats.tx_errors++; + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + spin_lock_irqsave(&comm->tx_lock, flags); + + tx_pos = comm->tx_pos; + txdesc = &comm->tx_desc[tx_pos]; + skbinfo = &comm->tx_temp_skb_info[tx_pos]; + skbinfo->mapping = mapping; + skbinfo->len = skb->len; + skbinfo->skb = skb; + + /* Set up a TX descriptor */ + cmd1 = TXD_OWN | TXD_SOP | TXD_EOP | (mac->to_vlan << 12) | + (skb->len & TXD_PKT_LEN); + cmd2 = skb->len & TXD_BUF_LEN1; + + if (tx_pos == (TX_DESC_NUM - 1)) + cmd2 |= TXD_EOR; + + txdesc->addr1 = skbinfo->mapping; + txdesc->cmd2 = cmd2; + wmb(); /* Set TXD_OWN after other fields are effective. */ + txdesc->cmd1 = cmd1; + + /* Move tx_pos to next position */ + tx_pos = ((tx_pos + 1) == TX_DESC_NUM) ? 0 : tx_pos + 1; + + if (unlikely(tx_pos == comm->tx_done_pos)) { + netif_stop_queue(ndev); + comm->tx_desc_full = 1; + } + comm->tx_pos = tx_pos; + wmb(); /* make sure settings are effective. */ + + /* Trigger mac to transmit */ + writel(MAC_TRIG_L_SOC0, comm->l2sw_reg_base + L2SW_CPU_TX_TRIG); + + spin_unlock_irqrestore(&comm->tx_lock, flags); + return NETDEV_TX_OK; +} + +static void spl2sw_ethernet_set_rx_mode(struct net_device *ndev) { + struct spl2sw_mac *mac = netdev_priv(ndev); + + spl2sw_mac_rx_mode_set(mac); +} + +static int spl2sw_ethernet_set_mac_address(struct net_device *ndev, +void *addr) { + struct spl2sw_mac *mac = netdev_priv(ndev); + int err; + + err = eth_mac_addr(ndev, addr); + if (err) + return err; + + /* Delete the old MAC address */ + netdev_dbg(ndev, "Old Ethernet (MAC) address = %pM\n", mac->mac_addr); + if (is_valid_ether_addr(mac->mac_addr)) { + err = spl2sw_mac_addr_del(mac); + if (err) + return err; + } + + /* Set the MAC address */ + ether_addr_copy(mac->mac_addr, ndev->dev_addr); + return spl2sw_mac_addr_add(mac); +} + +static void spl2sw_ethernet_tx_timeout(struct net_device *ndev, +unsigned int txqueue) { + struct spl2sw_mac *mac = netdev_priv(ndev); + struct spl2sw_common *comm = mac->comm; + unsigned long flags; + int i; + + netdev_err(ndev, "TX timed out!\n"); + ndev->stats.tx_errors++; + + spin_lock_irqsave(&comm->tx_lock, flags); + + for (i = 0; i < MAX_NETDEV_NUM; i++) + if (comm->ndev[i]) + netif_stop_queue(comm->ndev[i]); + + spl2sw_mac_soft_reset(comm); + + /* Accept TX packets again. */ + for (i = 0; i < MAX_NETDEV_NUM; i++) + if (comm->ndev[i]) { + netif_trans_update(comm->ndev[i]); + netif_wake_queue(comm->ndev[i]); + } + + spin_unlock_irqrestore(&comm->tx_lock, flags); } + +static const struct net_device_ops netdev_ops = { + .ndo_open = spl2sw_ethernet_open, + .ndo_stop = spl2sw_ethernet_stop, + .ndo_start_xmit = spl2sw_ethernet_start_xmit, + .ndo_set_rx_mode = spl2sw_ethernet_set_rx_mode, + .ndo_set_mac_address = spl2sw_ethernet_set_mac_address, + .ndo_do_ioctl = phy_do_ioctl, + .ndo_tx_timeout = spl2sw_ethernet_tx_timeout, }; + +static void spl2sw_check_mac_vendor_id_and_convert(u8 *mac_addr) { + u8 tmp; + + /* Byte order of MAC address of some samples are reversed. + * Check vendor id and convert byte order if it is wrong. + * OUI of Sunplus: fc:4b:bc + */ + if (mac_addr[5] == 0xfc && mac_addr[4] == 0x4b && mac_addr[3] == 0xbc && + (mac_addr[0] != 0xfc || mac_addr[1] != 0x4b || mac_addr[2] != 0xbc)) { + /* Swap mac_addr[0] and mac_addr[5] */ + tmp = mac_addr[0]; + mac_addr[0] = mac_addr[5]; + mac_addr[5] = tmp; + + /* Swap mac_addr[1] and mac_addr[4] */ + tmp = mac_addr[1]; + mac_addr[1] = mac_addr[4]; + mac_addr[4] = tmp; + + /* Swap mac_addr[2] and mac_addr[3] */ + tmp = mac_addr[2]; + mac_addr[2] = mac_addr[3]; + mac_addr[3] = tmp; + } +} + +static int spl2sw_nvmem_get_mac_address(struct device *dev, struct device_node *np, + void *addrbuf) +{ + struct nvmem_cell *cell; + ssize_t len; + u8 *mac; + + /* Get nvmem cell of mac-address from dts. */ + cell = of_nvmem_cell_get(np, "mac-address"); + if (IS_ERR(cell)) + return PTR_ERR(cell); + + /* Read mac address from nvmem cell. */ + mac = nvmem_cell_read(cell, &len); + nvmem_cell_put(cell); + if (IS_ERR(mac)) + return PTR_ERR(mac); + + if (len != ETH_ALEN) { + kfree(mac); + dev_info(dev, "Invalid length of mac address in nvmem!\n"); + return -EINVAL; + } + + /* Byte order of some samples are reversed. + * Convert byte order here. + */ + spl2sw_check_mac_vendor_id_and_convert(mac); + + /* Check if mac address is valid */ + if (!is_valid_ether_addr(mac)) { + kfree(mac); + dev_info(dev, "Invalid mac address in nvmem (%pM)!\n", mac); + return -EINVAL; + } + + ether_addr_copy(addrbuf, mac); + kfree(mac); + return 0; +} + +static u32 spl2sw_init_netdev(struct platform_device *pdev, u8 *mac_addr, + struct net_device **r_ndev) +{ + struct net_device *ndev; + struct spl2sw_mac *mac; + int ret; + + /* Allocate the devices, and also allocate spl2sw_mac, + * we can get it by netdev_priv(). + */ + ndev = devm_alloc_etherdev(&pdev->dev, sizeof(*mac)); + if (!ndev) { + *r_ndev = NULL; + return -ENOMEM; + } + SET_NETDEV_DEV(ndev, &pdev->dev); + ndev->netdev_ops = &netdev_ops; + mac = netdev_priv(ndev); + mac->ndev = ndev; + ether_addr_copy(mac->mac_addr, mac_addr); + + eth_hw_addr_set(ndev, mac_addr); + dev_info(&pdev->dev, "Ethernet (MAC) address = %pM\n", mac_addr); + + ret = register_netdev(ndev); + if (ret) { + dev_err(&pdev->dev, "Failed to register net device \"%s\"!\n", + ndev->name); + free_netdev(ndev); + *r_ndev = NULL; + return ret; + } + netdev_dbg(ndev, "Registered net device \"%s\" successfully.\n", +ndev->name); + + *r_ndev = ndev; + return 0; +} + +static struct device_node *spl2sw_get_eth_child_node(struct +device_node *ether_np, int id) { + struct device_node *port_np; + int port_id; + + for_each_child_of_node(ether_np, port_np) { + /* It is not a 'port' node, continue. */ + if (strcmp(port_np->name, "port")) + continue; + + if (of_property_read_u32(port_np, "reg", &port_id) < 0) + continue; + + if (port_id == id) + return port_np; + } + + /* Not found! */ + return NULL; +} + +static int spl2sw_probe(struct platform_device *pdev) { + struct device_node *eth_ports_np; + struct device_node *port_np; + struct spl2sw_common *comm; + struct device_node *phy_np; + phy_interface_t phy_mode; + struct net_device *ndev; + struct spl2sw_mac *mac; + u8 mac_addr[ETH_ALEN]; + int irq, i, ret; + + if (platform_get_drvdata(pdev)) + return -ENODEV; + + /* Allocate memory for 'spl2sw_common' area. */ + comm = devm_kzalloc(&pdev->dev, sizeof(*comm), GFP_KERNEL); + if (!comm) + return -ENOMEM; + + comm->pdev = pdev; + platform_set_drvdata(pdev, comm); + + spin_lock_init(&comm->tx_lock); + spin_lock_init(&comm->mdio_lock); + spin_lock_init(&comm->int_mask_lock); + + /* Get memory resource 0 from dts. */ + comm->l2sw_reg_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(comm->l2sw_reg_base)) + return PTR_ERR(comm->l2sw_reg_base); + + /* Get irq resource from dts. */ + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + irq = ret; + + /* Get clock controller. */ + comm->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(comm->clk)) { + dev_err_probe(&pdev->dev, PTR_ERR(comm->clk), + "Failed to retrieve clock controller!\n"); + return PTR_ERR(comm->clk); + } + + /* Get reset controller. */ + comm->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(comm->rstc)) { + dev_err_probe(&pdev->dev, PTR_ERR(comm->rstc), + "Failed to retrieve reset controller!\n"); + return PTR_ERR(comm->rstc); + } + + /* Enable clock. */ + ret = clk_prepare_enable(comm->clk); + if (ret) + return ret; + udelay(1); + + /* Reset MAC */ + reset_control_assert(comm->rstc); + udelay(1); + reset_control_deassert(comm->rstc); + usleep_range(1000, 2000); + + /* Request irq. */ + ret = devm_request_irq(&pdev->dev, irq, spl2sw_ethernet_interrupt, 0, + dev_name(&pdev->dev), comm); + if (ret) { + dev_err(&pdev->dev, "Failed to request irq #%d!\n", irq); + goto out_clk_disable; + } + + /* Initialize TX and RX descriptors. */ + ret = spl2sw_descs_init(comm); + if (ret) { + dev_err(&pdev->dev, "Fail to initialize mac descriptors!\n"); + spl2sw_descs_free(comm); + goto out_clk_disable; + } + + /* Initialize MAC. */ + spl2sw_mac_init(comm); + + /* Initialize mdio bus */ + ret = spl2sw_mdio_init(comm); + if (ret) { + dev_err(&pdev->dev, "Failed to initialize mdio bus!\n"); + goto out_clk_disable; + } + + /* Get child node ethernet-ports. */ + eth_ports_np = of_get_child_by_name(pdev->dev.of_node, "ethernet-ports"); + if (!eth_ports_np) { + dev_err(&pdev->dev, "No ethernet-ports child node found!\n"); + ret = -ENODEV; + goto out_free_mdio; + } + + for (i = 0; i < MAX_NETDEV_NUM; i++) { + /* Get port@i of node ethernet-ports. */ + port_np = spl2sw_get_eth_child_node(eth_ports_np, i); + if (!port_np) + continue; + + /* Get phy-mode. */ + if (of_get_phy_mode(port_np, &phy_mode)) { + dev_err(&pdev->dev, "Failed to get phy-mode property of port@%d!\n", + i); + continue; + } + + /* Get phy-handle. */ + phy_np = of_parse_phandle(port_np, "phy-handle", 0); + if (!phy_np) { + dev_err(&pdev->dev, "Failed to get phy-handle property of port@%d!\n", + i); + continue; + } + + /* Get mac-address from nvmem. */ + ret = spl2sw_nvmem_get_mac_address(&pdev->dev, port_np, mac_addr); + if (ret == -EPROBE_DEFER) { + goto out_unregister_dev; + } else if (ret) { + dev_info(&pdev->dev, "Generate a random mac address!\n"); + eth_random_addr(mac_addr); + } + + /* Initialize the net device. */ + ret = spl2sw_init_netdev(pdev, mac_addr, &ndev); + if (ret) + goto out_unregister_dev; + + ndev->irq = irq; + comm->ndev[i] = ndev; + mac = netdev_priv(ndev); + mac->phy_node = phy_np; + mac->phy_mode = phy_mode; + mac->comm = comm; + + mac->lan_port = 0x1 << i; /* forward to port i */ + mac->to_vlan = 0x1 << i; /* vlan group: i */ + mac->vlan_id = i; /* vlan group: i */ + + /* Set MAC address */ + ret = spl2sw_mac_addr_add(mac); + if (ret) + goto out_unregister_dev; + + spl2sw_mac_rx_mode_set(mac); + } + + /* Find first valid net device. */ + for (i = 0; i < MAX_NETDEV_NUM; i++) { + if (comm->ndev[i]) + break; + } + if (i >= MAX_NETDEV_NUM) { + dev_err(&pdev->dev, "No valid ethernet port!\n"); + ret = -ENODEV; + goto out_free_mdio; + } + + /* Save first valid net device */ + ndev = comm->ndev[i]; + + ret = spl2sw_phy_connect(comm); + if (ret) { + netdev_err(ndev, "Failed to connect phy!\n"); + goto out_unregister_dev; + } + + /* Add and enable napi. */ + netif_napi_add(ndev, &comm->rx_napi, spl2sw_rx_poll, NAPI_POLL_WEIGHT); + napi_enable(&comm->rx_napi); + netif_napi_add(ndev, &comm->tx_napi, spl2sw_tx_poll, NAPI_POLL_WEIGHT); + napi_enable(&comm->tx_napi); + return 0; + +out_unregister_dev: + for (i = 0; i < MAX_NETDEV_NUM; i++) + if (comm->ndev[i]) + unregister_netdev(comm->ndev[i]); + +out_free_mdio: + spl2sw_mdio_remove(comm); + +out_clk_disable: + clk_disable_unprepare(comm->clk); + return ret; +} + +static int spl2sw_remove(struct platform_device *pdev) { + struct spl2sw_common *comm; + int i; + + comm = platform_get_drvdata(pdev); + + spl2sw_phy_remove(comm); + + /* Unregister and free net device. */ + for (i = 0; i < MAX_NETDEV_NUM; i++) + if (comm->ndev[i]) + unregister_netdev(comm->ndev[i]); + + comm->enable = 0; + spl2sw_mac_hw_stop(comm); + spl2sw_descs_free(comm); + + /* Disable and delete napi. */ + napi_disable(&comm->rx_napi); + netif_napi_del(&comm->rx_napi); + napi_disable(&comm->tx_napi); + netif_napi_del(&comm->tx_napi); + + spl2sw_mdio_remove(comm); + + clk_disable_unprepare(comm->clk); + + return 0; +} + +static const struct of_device_id spl2sw_of_match[] = { + {.compatible = "sunplus,sp7021-emac"}, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, spl2sw_of_match); + +static struct platform_driver spl2sw_driver = { + .probe = spl2sw_probe, + .remove = spl2sw_remove, + .driver = { + .name = "sp7021_emac", + .owner = THIS_MODULE, + .of_match_table = spl2sw_of_match, + }, +}; + +module_platform_driver(spl2sw_driver); + +MODULE_AUTHOR("Wells Lu <wellslutw@gmail.com>"); +MODULE_DESCRIPTION("Sunplus Dual 10M/100M Ethernet driver"); +MODULE_LICENSE("GPL");diff --git a/drivers/net/ethernet/sunplus/spl2sw_int.cb/drivers/net/ethernet/sunplus/spl2sw_int.c new file mode 100644 index 000000000..e8eb30c44--- /dev/null +++ b/drivers/net/ethernet/sunplus/spl2sw_int.c@@ -0,0 +1,273 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright Sunplus Technology Co., Ltd. + * All rights reserved. + */ + +#include <linux/platform_device.h> +#include <linux/etherdevice.h> +#include <linux/netdevice.h> +#include <linux/bitfield.h> +#include <linux/spinlock.h> +#include <linux/of_mdio.h> + +#include "spl2sw_register.h" +#include "spl2sw_define.h" +#include "spl2sw_int.h" + +int spl2sw_rx_poll(struct napi_struct *napi, int budget) { + struct spl2sw_common *comm = container_of(napi, struct spl2sw_common, rx_napi); + struct spl2sw_mac_desc *desc, *h_desc; + struct net_device_stats *stats; + struct sk_buff *skb, *new_skb; + struct spl2sw_skb_info *sinfo; + int budget_left = budget; + unsigned long flags; + u32 rx_pos, pkg_len; + u32 num, rx_count; + s32 queue; + u32 mask; + int port; + u32 cmd; + + /* Process high-priority queue and then low-priority queue. */ + for (queue = 0; queue < RX_DESC_QUEUE_NUM; queue++) { + rx_pos = comm->rx_pos[queue]; + rx_count = comm->rx_desc_num[queue]; + + for (num = 0; num < rx_count && budget_left; num++) { + sinfo = comm->rx_skb_info[queue] + rx_pos; + desc = comm->rx_desc[queue] + rx_pos; + cmd = desc->cmd1; + + if (cmd & RXD_OWN) + break; + + port = FIELD_GET(RXD_PKT_SP, cmd); + if (port < MAX_NETDEV_NUM && comm->ndev[port]) + stats = &comm->ndev[port]->stats; + else + goto spl2sw_rx_poll_rec_err; + + pkg_len = FIELD_GET(RXD_PKT_LEN, cmd); + if (unlikely((cmd & RXD_ERR_CODE) || pkg_len < ETH_ZLEN + 4)) { + stats->rx_length_errors++; + stats->rx_dropped++; + goto spl2sw_rx_poll_rec_err; + } + + dma_unmap_single(&comm->pdev->dev, sinfo->mapping, + comm->rx_desc_buff_size, DMA_FROM_DEVICE); + + skb = sinfo->skb; + skb_put(skb, pkg_len - 4); /* Minus FCS */ + skb->ip_summed = CHECKSUM_NONE; + skb->protocol = eth_type_trans(skb, comm->ndev[port]); + netif_receive_skb(skb); + + stats->rx_packets++; + stats->rx_bytes += skb->len; + + /* Allocate a new skb for receiving. */ + new_skb = netdev_alloc_skb(NULL, comm->rx_desc_buff_size); + if (unlikely(!new_skb)) { + desc->cmd2 = (rx_pos == comm->rx_desc_num[queue] - 1) ? + RXD_EOR : 0; + sinfo->skb = NULL; + sinfo->mapping = 0; + desc->addr1 = 0; + goto spl2sw_rx_poll_alloc_err; + } + + sinfo->mapping = dma_map_single(&comm->pdev->dev, new_skb->data, + comm->rx_desc_buff_size, + DMA_FROM_DEVICE); + if (dma_mapping_error(&comm->pdev->dev, sinfo->mapping)) { + dev_kfree_skb_irq(new_skb); + desc->cmd2 = (rx_pos == comm->rx_desc_num[queue] - 1) ? + RXD_EOR : 0; + sinfo->skb = NULL; + sinfo->mapping = 0; + desc->addr1 = 0; + goto spl2sw_rx_poll_alloc_err; + } + + sinfo->skb = new_skb; + desc->addr1 = sinfo->mapping; + +spl2sw_rx_poll_rec_err: + desc->cmd2 = (rx_pos == comm->rx_desc_num[queue] - 1) ? + RXD_EOR | comm->rx_desc_buff_size : + comm->rx_desc_buff_size; + + wmb(); /* Set RXD_OWN after other fields are effective. */ + desc->cmd1 = RXD_OWN; + +spl2sw_rx_poll_alloc_err: + /* Move rx_pos to next position */ + rx_pos = ((rx_pos + 1) == comm->rx_desc_num[queue]) ? 0 : rx_pos + +1; + + budget_left--; + + /* If there are packets in high-priority queue, + * stop processing low-priority queue. + */ + if (queue == 1 && !(h_desc->cmd1 & RXD_OWN)) + break; + } + + comm->rx_pos[queue] = rx_pos; + + /* Save pointer to last rx descriptor of high-priority queue. */ + if (queue == 0) + h_desc = comm->rx_desc[queue] + rx_pos; + } + + wmb(); /* make sure settings are effective. */It's unclear to me why a memory barrier is needed here. Which writes should be visibile before the following? Also the spin lock/unlock pair below implies a full memory barrier.quoted
+ spin_lock_irqsave(&comm->int_mask_lock, flags); + mask = readl(comm->l2sw_reg_base + L2SW_SW_INT_MASK_0); + mask &= ~MAC_INT_RX; + writel(mask, comm->l2sw_reg_base + L2SW_SW_INT_MASK_0); + spin_unlock_irqrestore(&comm->int_mask_lock, flags); + + napi_complete(napi); + return budget - budget_left; +} + +int spl2sw_tx_poll(struct napi_struct *napi, int budget) { + struct spl2sw_common *comm = container_of(napi, struct spl2sw_common, tx_napi); + struct spl2sw_skb_info *skbinfo; + struct net_device_stats *stats; + int budget_left = budget; + unsigned long flags; + u32 tx_done_pos; + u32 mask; + u32 cmd; + int i; + + spin_lock(&comm->tx_lock); + + tx_done_pos = comm->tx_done_pos; + while (((tx_done_pos != comm->tx_pos) || (comm->tx_desc_full == 1)) && budget_left){quoted
+ cmd = comm->tx_desc[tx_done_pos].cmd1; + if (cmd & TXD_OWN) + break; + + skbinfo = &comm->tx_temp_skb_info[tx_done_pos]; + if (unlikely(!skbinfo->skb)) + goto spl2sw_tx_poll_next; + + i = ffs(FIELD_GET(TXD_VLAN, cmd)) - 1; + if (i < MAX_NETDEV_NUM && comm->ndev[i]) + stats = &comm->ndev[i]->stats; + else + goto spl2sw_tx_poll_unmap; + + if (unlikely(cmd & (TXD_ERR_CODE))) { + stats->tx_errors++; + } else { + stats->tx_packets++; + stats->tx_bytes += skbinfo->len; + } + +spl2sw_tx_poll_unmap: + dma_unmap_single(&comm->pdev->dev, skbinfo->mapping, skbinfo->len, + DMA_TO_DEVICE); + skbinfo->mapping = 0; + dev_kfree_skb_irq(skbinfo->skb); + skbinfo->skb = NULL; + +spl2sw_tx_poll_next: + /* Move tx_done_pos to next position */ + tx_done_pos = ((tx_done_pos + 1) == TX_DESC_NUM) ? 0 : tx_done_pos ++ 1; + + if (comm->tx_desc_full == 1) + comm->tx_desc_full = 0; + + budget_left--; + } + + comm->tx_done_pos = tx_done_pos; + if (!comm->tx_desc_full) + for (i = 0; i < MAX_NETDEV_NUM; i++) + if (comm->ndev[i]) + if (netif_queue_stopped(comm->ndev[i])) + netif_wake_queue(comm->ndev[i]); + + spin_unlock(&comm->tx_lock); + + wmb(); /* make sure settings are effective. */Same here. Thanks, Paolo
I'll remove the unnecessary memory barriers. Thank you for your review. Best regards, Wells