On Mon, 2022-05-02 at 21:23 +0800, Wells Lu wrote: > Add driver for Sunplus SP7021 SoC. > > Reviewed-by: Andrew Lunn <andrew@xxxxxxx> > Signed-off-by: Wells Lu <wellslutw@xxxxxxxxx> > --- > 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.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index 22a2f9699..11a062c42 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -18890,6 +18890,7 @@ L: netdev@xxxxxxxxxxxxxxx > 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@xxxxxxxxx> > diff --git a/drivers/net/ethernet/Kconfig b/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/Makefile b/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 --git a/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_SUNPLUS > diff --git a/drivers/net/ethernet/sunplus/Makefile b/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.o > diff --git a/drivers/net/ethernet/sunplus/spl2sw_define.h b/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; > +}; > + > +#endif > diff --git a/drivers/net/ethernet/sunplus/spl2sw_desc.c b/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, > + 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.h b/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); > + > +#endif > diff --git a/drivers/net/ethernet/sunplus/spl2sw_driver.c b/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@xxxxxxxxx>"); > +MODULE_DESCRIPTION("Sunplus Dual 10M/100M Ethernet driver"); > +MODULE_LICENSE("GPL"); > diff --git a/drivers/net/ethernet/sunplus/spl2sw_int.c b/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. > + 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) { > + 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
