diff options
Diffstat (limited to 'drivers/net/ethernet/synopsys/dwc_eth_qos.c')
| -rw-r--r-- | drivers/net/ethernet/synopsys/dwc_eth_qos.c | 3019 |
1 files changed, 3019 insertions, 0 deletions
diff --git a/drivers/net/ethernet/synopsys/dwc_eth_qos.c b/drivers/net/ethernet/synopsys/dwc_eth_qos.c new file mode 100644 index 000000000000..85b3326775b8 --- /dev/null +++ b/drivers/net/ethernet/synopsys/dwc_eth_qos.c @@ -0,0 +1,3019 @@ +/* Synopsys DWC Ethernet Quality-of-Service v4.10a linux driver + * + * This is a driver for the Synopsys DWC Ethernet QoS IP version 4.10a (GMAC). + * This version introduced a lot of changes which breaks backwards + * compatibility the non-QoS IP from Synopsys (used in the ST Micro drivers). + * Some fields differ between version 4.00a and 4.10a, mainly the interrupt + * bit fields. The driver could be made compatible with 4.00, if all relevant + * HW erratas are handled. + * + * The GMAC is highly configurable at synthesis time. This driver has been + * developed for a subset of the total available feature set. Currently + * it supports: + * - TSO + * - Checksum offload for RX and TX. + * - Energy efficient ethernet. + * - GMII phy interface. + * - The statistics module. + * - Single RX and TX queue. + * + * Copyright (C) 2015 Axis Communications AB. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/ethtool.h> +#include <linux/stat.h> +#include <linux/types.h> + +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/mm.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/platform_device.h> + +#include <linux/phy.h> +#include <linux/mii.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/vmalloc.h> +#include <linux/version.h> + +#include <linux/device.h> +#include <linux/bitrev.h> +#include <linux/crc32.h> + +#include <linux/of.h> +#include <linux/interrupt.h> +#include <linux/clocksource.h> +#include <linux/net_tstamp.h> +#include <linux/pm_runtime.h> +#include <linux/of_net.h> +#include <linux/of_address.h> +#include <linux/of_mdio.h> +#include <linux/timer.h> +#include <linux/tcp.h> + +#define DRIVER_NAME "dwceqos" +#define DRIVER_DESCRIPTION "Synopsys DWC Ethernet QoS driver" +#define DRIVER_VERSION "0.9" + +#define DWCEQOS_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \ + NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) + +#define DWCEQOS_TX_TIMEOUT 5 /* Seconds */ + +#define DWCEQOS_LPI_TIMER_MIN 8 +#define DWCEQOS_LPI_TIMER_MAX ((1 << 20) - 1) + +#define DWCEQOS_RX_BUF_SIZE 2048 + +#define DWCEQOS_RX_DCNT 256 +#define DWCEQOS_TX_DCNT 256 + +#define DWCEQOS_HASH_TABLE_SIZE 64 + +/* The size field in the DMA descriptor is 14 bits */ +#define BYTES_PER_DMA_DESC 16376 + +/* Hardware registers */ +#define START_MAC_REG_OFFSET 0x0000 +#define MAX_MAC_REG_OFFSET 0x0bd0 +#define START_MTL_REG_OFFSET 0x0c00 +#define MAX_MTL_REG_OFFSET 0x0d7c +#define START_DMA_REG_OFFSET 0x1000 +#define MAX_DMA_REG_OFFSET 0x117C + +#define REG_SPACE_SIZE 0x1800 + +/* DMA */ +#define REG_DWCEQOS_DMA_MODE 0x1000 +#define REG_DWCEQOS_DMA_SYSBUS_MODE 0x1004 +#define REG_DWCEQOS_DMA_IS 0x1008 +#define REG_DWCEQOS_DMA_DEBUG_ST0 0x100c + +/* DMA channel registers */ +#define REG_DWCEQOS_DMA_CH0_CTRL 0x1100 +#define REG_DWCEQOS_DMA_CH0_TX_CTRL 0x1104 +#define REG_DWCEQOS_DMA_CH0_RX_CTRL 0x1108 +#define REG_DWCEQOS_DMA_CH0_TXDESC_LIST 0x1114 +#define REG_DWCEQOS_DMA_CH0_RXDESC_LIST 0x111c +#define REG_DWCEQOS_DMA_CH0_TXDESC_TAIL 0x1120 +#define REG_DWCEQOS_DMA_CH0_RXDESC_TAIL 0x1128 +#define REG_DWCEQOS_DMA_CH0_TXDESC_LEN 0x112c +#define REG_DWCEQOS_DMA_CH0_RXDESC_LEN 0x1130 +#define REG_DWCEQOS_DMA_CH0_IE 0x1134 +#define REG_DWCEQOS_DMA_CH0_CUR_TXDESC 0x1144 +#define REG_DWCEQOS_DMA_CH0_CUR_RXDESC 0x114c +#define REG_DWCEQOS_DMA_CH0_CUR_TXBUF 0x1154 +#define REG_DWCEQOS_DMA_CH0_CUR_RXBUG 0x115c +#define REG_DWCEQOS_DMA_CH0_STA 0x1160 + +#define DWCEQOS_DMA_MODE_TXPR BIT(11) +#define DWCEQOS_DMA_MODE_DA BIT(1) + +#define DWCEQOS_DMA_SYSBUS_MODE_EN_LPI BIT(31) +#define DWCEQOS_DMA_SYSBUS_MODE_FB BIT(0) +#define DWCEQOS_DMA_SYSBUS_MODE_AAL BIT(12) + +#define DWCEQOS_DMA_SYSBUS_MODE_RD_OSR_LIMIT(x) \ + (((x) << 16) & 0x000F0000) +#define DWCEQOS_DMA_SYSBUS_MODE_RD_OSR_LIMIT_DEFAULT 3 +#define DWCEQOS_DMA_SYSBUS_MODE_RD_OSR_LIMIT_MASK GENMASK(19, 16) + +#define DWCEQOS_DMA_SYSBUS_MODE_WR_OSR_LIMIT(x) \ + (((x) << 24) & 0x0F000000) +#define DWCEQOS_DMA_SYSBUS_MODE_WR_OSR_LIMIT_DEFAULT 3 +#define DWCEQOS_DMA_SYSBUS_MODE_WR_OSR_LIMIT_MASK GENMASK(27, 24) + +#define DWCEQOS_DMA_SYSBUS_MODE_BURST_MASK GENMASK(7, 1) +#define DWCEQOS_DMA_SYSBUS_MODE_BURST(x) \ + (((x) << 1) & DWCEQOS_DMA_SYSBUS_MODE_BURST_MASK) +#define DWCEQOS_DMA_SYSBUS_MODE_BURST_DEFAULT GENMASK(3, 1) + +#define DWCEQOS_DMA_CH_CTRL_PBLX8 BIT(16) +#define DWCEQOS_DMA_CH_CTRL_DSL(x) ((x) << 18) + +#define DWCEQOS_DMA_CH_CTRL_PBL(x) ((x) << 16) +#define DWCEQOS_DMA_CH_CTRL_START BIT(0) +#define DWCEQOS_DMA_CH_RX_CTRL_BUFSIZE(x) ((x) << 1) +#define DWCEQOS_DMA_CH_TX_OSP BIT(4) +#define DWCEQOS_DMA_CH_TX_TSE BIT(12) + +#define DWCEQOS_DMA_CH0_IE_NIE BIT(15) +#define DWCEQOS_DMA_CH0_IE_AIE BIT(14) +#define DWCEQOS_DMA_CH0_IE_RIE BIT(6) +#define DWCEQOS_DMA_CH0_IE_TIE BIT(0) +#define DWCEQOS_DMA_CH0_IE_FBEE BIT(12) +#define DWCEQOS_DMA_CH0_IE_RBUE BIT(7) + +#define DWCEQOS_DMA_IS_DC0IS BIT(0) +#define DWCEQOS_DMA_IS_MTLIS BIT(16) +#define DWCEQOS_DMA_IS_MACIS BIT(17) + +#define DWCEQOS_DMA_CH0_IS_TI BIT(0) +#define DWCEQOS_DMA_CH0_IS_RI BIT(6) +#define DWCEQOS_DMA_CH0_IS_RBU BIT(7) +#define DWCEQOS_DMA_CH0_IS_FBE BIT(12) +#define DWCEQOS_DMA_CH0_IS_CDE BIT(13) +#define DWCEQOS_DMA_CH0_IS_AIS BIT(14) + +#define DWCEQOS_DMA_CH0_IS_TEB GENMASK(18, 16) +#define DWCEQOS_DMA_CH0_IS_TX_ERR_READ BIT(16) +#define DWCEQOS_DMA_CH0_IS_TX_ERR_DESCR BIT(17) + +#define DWCEQOS_DMA_CH0_IS_REB GENMASK(21, 19) +#define DWCEQOS_DMA_CH0_IS_RX_ERR_READ BIT(19) +#define DWCEQOS_DMA_CH0_IS_RX_ERR_DESCR BIT(20) + +/* DMA descriptor bits for RX normal descriptor (read format) */ +#define DWCEQOS_DMA_RDES3_OWN BIT(31) +#define DWCEQOS_DMA_RDES3_INTE BIT(30) +#define DWCEQOS_DMA_RDES3_BUF2V BIT(25) +#define DWCEQOS_DMA_RDES3_BUF1V BIT(24) + +/* DMA descriptor bits for RX normal descriptor (write back format) */ +#define DWCEQOS_DMA_RDES1_IPCE BIT(7) +#define DWCEQOS_DMA_RDES3_ES BIT(15) +#define DWCEQOS_DMA_RDES3_E_JT BIT(14) +#define DWCEQOS_DMA_RDES3_PL(x) ((x) & 0x7fff) +#define DWCEQOS_DMA_RDES1_PT 0x00000007 +#define DWCEQOS_DMA_RDES1_PT_UDP BIT(0) +#define DWCEQOS_DMA_RDES1_PT_TCP BIT(1) +#define DWCEQOS_DMA_RDES1_PT_ICMP 0x00000003 + +/* DMA descriptor bits for TX normal descriptor (read format) */ +#define DWCEQOS_DMA_TDES2_IOC BIT(31) +#define DWCEQOS_DMA_TDES3_OWN BIT(31) +#define DWCEQOS_DMA_TDES3_CTXT BIT(30) +#define DWCEQOS_DMA_TDES3_FD BIT(29) +#define DWCEQOS_DMA_TDES3_LD BIT(28) +#define DWCEQOS_DMA_TDES3_CIPH BIT(16) +#define DWCEQOS_DMA_TDES3_CIPP BIT(17) +#define DWCEQOS_DMA_TDES3_CA 0x00030000 +#define DWCEQOS_DMA_TDES3_TSE BIT(18) +#define DWCEQOS_DMA_DES3_THL(x) ((x) << 19) +#define DWCEQOS_DMA_DES2_B2L(x) ((x) << 16) + +#define DWCEQOS_DMA_TDES3_TCMSSV BIT(26) + +/* DMA channel states */ +#define DMA_TX_CH_STOPPED 0 +#define DMA_TX_CH_SUSPENDED 6 + +#define DMA_GET_TX_STATE_CH0(status0) ((status0 & 0xF000) >> 12) + +/* MTL */ +#define REG_DWCEQOS_MTL_OPER 0x0c00 +#define REG_DWCEQOS_MTL_DEBUG_ST 0x0c0c +#define REG_DWCEQOS_MTL_TXQ0_DEBUG_ST 0x0d08 +#define REG_DWCEQOS_MTL_RXQ0_DEBUG_ST 0x0d38 + +#define REG_DWCEQOS_MTL_IS 0x0c20 +#define REG_DWCEQOS_MTL_TXQ0_OPER 0x0d00 +#define REG_DWCEQOS_MTL_RXQ0_OPER 0x0d30 +#define REG_DWCEQOS_MTL_RXQ0_MIS_CNT 0x0d34 +#define REG_DWCEQOS_MTL_RXQ0_CTRL 0x0d3c + +#define REG_DWCEQOS_MTL_Q0_ISCTRL 0x0d2c + +#define DWCEQOS_MTL_SCHALG_STRICT 0x00000060 + +#define DWCEQOS_MTL_TXQ_TXQEN BIT(3) +#define DWCEQOS_MTL_TXQ_TSF BIT(1) +#define DWCEQOS_MTL_TXQ_FTQ BIT(0) +#define DWCEQOS_MTL_TXQ_TTC512 0x00000070 + +#define DWCEQOS_MTL_TXQ_SIZE(x) ((((x) - 256) & 0xff00) << 8) + +#define DWCEQOS_MTL_RXQ_SIZE(x) ((((x) - 256) & 0xff00) << 12) +#define DWCEQOS_MTL_RXQ_EHFC BIT(7) +#define DWCEQOS_MTL_RXQ_DIS_TCP_EF BIT(6) +#define DWCEQOS_MTL_RXQ_FEP BIT(4) +#define DWCEQOS_MTL_RXQ_FUP BIT(3) +#define DWCEQOS_MTL_RXQ_RSF BIT(5) +#define DWCEQOS_MTL_RXQ_RTC32 BIT(0) + +/* MAC */ +#define REG_DWCEQOS_MAC_CFG 0x0000 +#define REG_DWCEQOS_MAC_EXT_CFG 0x0004 +#define REG_DWCEQOS_MAC_PKT_FILT 0x0008 +#define REG_DWCEQOS_MAC_WD_TO 0x000c +#define REG_DWCEQOS_HASTABLE_LO 0x0010 +#define REG_DWCEQOS_HASTABLE_HI 0x0014 +#define REG_DWCEQOS_MAC_IS 0x00b0 +#define REG_DWCEQOS_MAC_IE 0x00b4 +#define REG_DWCEQOS_MAC_STAT 0x00b8 +#define REG_DWCEQOS_MAC_MDIO_ADDR 0x0200 +#define REG_DWCEQOS_MAC_MDIO_DATA 0x0204 +#define REG_DWCEQOS_MAC_MAC_ADDR0_HI 0x0300 +#define REG_DWCEQOS_MAC_MAC_ADDR0_LO 0x0304 +#define REG_DWCEQOS_MAC_RXQ0_CTRL0 0x00a0 +#define REG_DWCEQOS_MAC_HW_FEATURE0 0x011c +#define REG_DWCEQOS_MAC_HW_FEATURE1 0x0120 +#define REG_DWCEQOS_MAC_HW_FEATURE2 0x0124 +#define REG_DWCEQOS_MAC_HASHTABLE_LO 0x0010 +#define REG_DWCEQOS_MAC_HASHTABLE_HI 0x0014 +#define REG_DWCEQOS_MAC_LPI_CTRL_STATUS 0x00d0 +#define REG_DWCEQOS_MAC_LPI_TIMERS_CTRL 0x00d4 +#define REG_DWCEQOS_MAC_LPI_ENTRY_TIMER 0x00d8 +#define REG_DWCEQOS_MAC_1US_TIC_COUNTER 0x00dc +#define REG_DWCEQOS_MAC_RX_FLOW_CTRL 0x0090 +#define REG_DWCEQOS_MAC_Q0_TX_FLOW 0x0070 + +#define DWCEQOS_MAC_CFG_ACS BIT(20) +#define DWCEQOS_MAC_CFG_JD BIT(17) +#define DWCEQOS_MAC_CFG_JE BIT(16) +#define DWCEQOS_MAC_CFG_PS BIT(15) +#define DWCEQOS_MAC_CFG_FES BIT(14) +#define DWCEQOS_MAC_CFG_DM BIT(13) +#define DWCEQOS_MAC_CFG_DO BIT(10) +#define DWCEQOS_MAC_CFG_TE BIT(1) +#define DWCEQOS_MAC_CFG_IPC BIT(27) +#define DWCEQOS_MAC_CFG_RE BIT(0) + +#define DWCEQOS_ADDR_HIGH(reg) (0x00000300 + (reg * 8)) +#define DWCEQOS_ADDR_LOW(reg) (0x00000304 + (reg * 8)) + +#define DWCEQOS_MAC_IS_LPI_INT BIT(5) +#define DWCEQOS_MAC_IS_MMC_INT BIT(8) + +#define DWCEQOS_MAC_RXQ_EN BIT(1) +#define DWCEQOS_MAC_MAC_ADDR_HI_EN BIT(31) +#define DWCEQOS_MAC_PKT_FILT_RA BIT(31) +#define DWCEQOS_MAC_PKT_FILT_HPF BIT(10) +#define DWCEQOS_MAC_PKT_FILT_SAF BIT(9) +#define DWCEQOS_MAC_PKT_FILT_SAIF BIT(8) +#define DWCEQOS_MAC_PKT_FILT_DBF BIT(5) +#define DWCEQOS_MAC_PKT_FILT_PM BIT(4) +#define DWCEQOS_MAC_PKT_FILT_DAIF BIT(3) +#define DWCEQOS_MAC_PKT_FILT_HMC BIT(2) +#define DWCEQOS_MAC_PKT_FILT_HUC BIT(1) +#define DWCEQOS_MAC_PKT_FILT_PR BIT(0) + +#define DWCEQOS_MAC_MDIO_ADDR_CR(x) (((x & 15)) << 8) +#define DWCEQOS_MAC_MDIO_ADDR_CR_20 2 +#define DWCEQOS_MAC_MDIO_ADDR_CR_35 3 +#define DWCEQOS_MAC_MDIO_ADDR_CR_60 0 +#define DWCEQOS_MAC_MDIO_ADDR_CR_100 1 +#define DWCEQOS_MAC_MDIO_ADDR_CR_150 4 +#define DWCEQOS_MAC_MDIO_ADDR_CR_250 5 +#define DWCEQOS_MAC_MDIO_ADDR_GOC_READ 0x0000000c +#define DWCEQOS_MAC_MDIO_ADDR_GOC_WRITE BIT(2) +#define DWCEQOS_MAC_MDIO_ADDR_GB BIT(0) + +#define DWCEQOS_MAC_LPI_CTRL_STATUS_TLPIEN BIT(0) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_TLPIEX BIT(1) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_RLPIEN BIT(2) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_RLPIEX BIT(3) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_TLPIST BIT(8) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_RLPIST BIT(9) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_LPIEN BIT(16) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_PLS BIT(17) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_PLSEN BIT(18) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_LIPTXA BIT(19) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_LPITE BIT(20) +#define DWCEQOS_MAC_LPI_CTRL_STATUS_LPITCSE BIT(21) + +#define DWCEQOS_MAC_1US_TIC_COUNTER_VAL(x) ((x) & GENMASK(11, 0)) + +#define DWCEQOS_LPI_CTRL_ENABLE_EEE (DWCEQOS_MAC_LPI_CTRL_STATUS_LPITE | \ + DWCEQOS_MAC_LPI_CTRL_STATUS_LIPTXA | \ + DWCEQOS_MAC_LPI_CTRL_STATUS_LPIEN) + +#define DWCEQOS_MAC_RX_FLOW_CTRL_RFE BIT(0) + +#define DWCEQOS_MAC_Q0_TX_FLOW_TFE BIT(1) +#define DWCEQOS_MAC_Q0_TX_FLOW_PT(time) ((time) << 16) +#define DWCEQOS_MAC_Q0_TX_FLOW_PLT_4_SLOTS (0 << 4) + +/* Features */ +#define DWCEQOS_MAC_HW_FEATURE0_RXCOESEL BIT(16) +#define DWCEQOS_MAC_HW_FEATURE0_TXCOESEL BIT(14) +#define DWCEQOS_MAC_HW_FEATURE0_HDSEL BIT(2) +#define DWCEQOS_MAC_HW_FEATURE0_EEESEL BIT(13) +#define DWCEQOS_MAC_HW_FEATURE0_GMIISEL BIT(1) +#define DWCEQOS_MAC_HW_FEATURE0_MIISEL BIT(0) + +#define DWCEQOS_MAC_HW_FEATURE1_TSOEN BIT(18) +#define DWCEQOS_MAC_HW_FEATURE1_TXFIFOSIZE(x) ((128 << ((x) & 0x7c0)) >> 6) +#define DWCEQOS_MAC_HW_FEATURE1_RXFIFOSIZE(x) (128 << ((x) & 0x1f)) + +#define DWCEQOS_MAX_PERFECT_ADDRESSES(feature1) \ + (1 + (((feature1) & 0x1fc0000) >> 18)) + +#define DWCEQOS_MDIO_PHYADDR(x) (((x) & 0x1f) << 21) +#define DWCEQOS_MDIO_PHYREG(x) (((x) & 0x1f) << 16) + +#define DWCEQOS_DMA_MODE_SWR BIT(0) + +#define DWCEQOS_DWCEQOS_RX_BUF_SIZE 2048 + +/* Mac Management Counters */ +#define REG_DWCEQOS_MMC_CTRL 0x0700 +#define REG_DWCEQOS_MMC_RXIRQ 0x0704 +#define REG_DWCEQOS_MMC_TXIRQ 0x0708 +#define REG_DWCEQOS_MMC_RXIRQMASK 0x070c +#define REG_DWCEQOS_MMC_TXIRQMASK 0x0710 + +#define DWCEQOS_MMC_CTRL_CNTRST BIT(0) +#define DWCEQOS_MMC_CTRL_RSTONRD BIT(2) + +#define DWC_MMC_TXLPITRANSCNTR 0x07F0 +#define DWC_MMC_TXLPIUSCNTR 0x07EC +#define DWC_MMC_TXOVERSIZE_G 0x0778 +#define DWC_MMC_TXVLANPACKETS_G 0x0774 +#define DWC_MMC_TXPAUSEPACKETS 0x0770 +#define DWC_MMC_TXEXCESSDEF 0x076C +#define DWC_MMC_TXPACKETCOUNT_G 0x0768 +#define DWC_MMC_TXOCTETCOUNT_G 0x0764 +#define DWC_MMC_TXCARRIERERROR 0x0760 +#define DWC_MMC_TXEXCESSCOL 0x075C +#define DWC_MMC_TXLATECOL 0x0758 +#define DWC_MMC_TXDEFERRED 0x0754 +#define DWC_MMC_TXMULTICOL_G 0x0750 +#define DWC_MMC_TXSINGLECOL_G 0x074C +#define DWC_MMC_TXUNDERFLOWERROR 0x0748 +#define DWC_MMC_TXBROADCASTPACKETS_GB 0x0744 +#define DWC_MMC_TXMULTICASTPACKETS_GB 0x0740 +#define DWC_MMC_TXUNICASTPACKETS_GB 0x073C +#define DWC_MMC_TX1024TOMAXOCTETS_GB 0x0738 +#define DWC_MMC_TX512TO1023OCTETS_GB 0x0734 +#define DWC_MMC_TX256TO511OCTETS_GB 0x0730 +#define DWC_MMC_TX128TO255OCTETS_GB 0x072C +#define DWC_MMC_TX65TO127OCTETS_GB 0x0728 +#define DWC_MMC_TX64OCTETS_GB 0x0724 +#define DWC_MMC_TXMULTICASTPACKETS_G 0x0720 +#define DWC_MMC_TXBROADCASTPACKETS_G 0x071C +#define DWC_MMC_TXPACKETCOUNT_GB 0x0718 +#define DWC_MMC_TXOCTETCOUNT_GB 0x0714 + +#define DWC_MMC_RXLPITRANSCNTR 0x07F8 +#define DWC_MMC_RXLPIUSCNTR 0x07F4 +#define DWC_MMC_RXCTRLPACKETS_G 0x07E4 +#define DWC_MMC_RXRCVERROR 0x07E0 +#define DWC_MMC_RXWATCHDOG 0x07DC +#define DWC_MMC_RXVLANPACKETS_GB 0x07D8 +#define DWC_MMC_RXFIFOOVERFLOW 0x07D4 +#define DWC_MMC_RXPAUSEPACKETS 0x07D0 +#define DWC_MMC_RXOUTOFRANGETYPE 0x07CC +#define DWC_MMC_RXLENGTHERROR 0x07C8 +#define DWC_MMC_RXUNICASTPACKETS_G 0x07C4 +#define DWC_MMC_RX1024TOMAXOCTETS_GB 0x07C0 +#define DWC_MMC_RX512TO1023OCTETS_GB 0x07BC +#define DWC_MMC_RX256TO511OCTETS_GB 0x07B8 +#define DWC_MMC_RX128TO255OCTETS_GB 0x07B4 +#define DWC_MMC_RX65TO127OCTETS_GB 0x07B0 +#define DWC_MMC_RX64OCTETS_GB 0x07AC +#define DWC_MMC_RXOVERSIZE_G 0x07A8 +#define DWC_MMC_RXUNDERSIZE_G 0x07A4 +#define DWC_MMC_RXJABBERERROR 0x07A0 +#define DWC_MMC_RXRUNTERROR 0x079C +#define DWC_MMC_RXALIGNMENTERROR 0x0798 +#define DWC_MMC_RXCRCERROR 0x0794 +#define DWC_MMC_RXMULTICASTPACKETS_G 0x0790 +#define DWC_MMC_RXBROADCASTPACKETS_G 0x078C +#define DWC_MMC_RXOCTETCOUNT_G 0x0788 +#define DWC_MMC_RXOCTETCOUNT_GB 0x0784 +#define DWC_MMC_RXPACKETCOUNT_GB 0x0780 + +static int debug = 3; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "DWC_eth_qos debug level (0=none,...,16=all)"); + +/* DMA ring descriptor. These are used as support descriptors for the HW DMA */ +struct ring_desc { + struct sk_buff *skb; + dma_addr_t mapping; + size_t len; +}; + +/* DMA hardware descriptor */ +struct dwceqos_dma_desc { + u32 des0; + u32 des1; + u32 des2; + u32 des3; +} ____cacheline_aligned; + +struct dwceqos_mmc_counters { + __u64 txlpitranscntr; + __u64 txpiuscntr; + __u64 txoversize_g; + __u64 txvlanpackets_g; + __u64 txpausepackets; + __u64 txexcessdef; + __u64 txpacketcount_g; + __u64 txoctetcount_g; + __u64 txcarriererror; + __u64 txexcesscol; + __u64 txlatecol; + __u64 txdeferred; + __u64 txmulticol_g; + __u64 txsinglecol_g; + __u64 txunderflowerror; + __u64 txbroadcastpackets_gb; + __u64 txmulticastpackets_gb; + __u64 txunicastpackets_gb; + __u64 tx1024tomaxoctets_gb; + __u64 tx512to1023octets_gb; + __u64 tx256to511octets_gb; + __u64 tx128to255octets_gb; + __u64 tx65to127octets_gb; + __u64 tx64octets_gb; + __u64 txmulticastpackets_g; + __u64 txbroadcastpackets_g; + __u64 txpacketcount_gb; + __u64 txoctetcount_gb; + + __u64 rxlpitranscntr; + __u64 rxlpiuscntr; + __u64 rxctrlpackets_g; + __u64 rxrcverror; + __u64 rxwatchdog; + __u64 rxvlanpackets_gb; + __u64 rxfifooverflow; + __u64 rxpausepackets; + __u64 rxoutofrangetype; + __u64 rxlengtherror; + __u64 rxunicastpackets_g; + __u64 rx1024tomaxoctets_gb; + __u64 rx512to1023octets_gb; + __u64 rx256to511octets_gb; + __u64 rx128to255octets_gb; + __u64 rx65to127octets_gb; + __u64 rx64octets_gb; + __u64 rxoversize_g; + __u64 rxundersize_g; + __u64 rxjabbererror; + __u64 rxrunterror; + __u64 rxalignmenterror; + __u64 rxcrcerror; + __u64 rxmulticastpackets_g; + __u64 rxbroadcastpackets_g; + __u64 rxoctetcount_g; + __u64 rxoctetcount_gb; + __u64 rxpacketcount_gb; +}; + +/* Ethtool statistics */ + +struct dwceqos_stat { + const char stat_name[ETH_GSTRING_LEN]; + int offset; +}; + +#define STAT_ITEM(name, var) \ + {\ + name,\ + offsetof(struct dwceqos_mmc_counters, var),\ + } + +static const struct dwceqos_stat dwceqos_ethtool_stats[] = { + STAT_ITEM("tx_bytes", txoctetcount_gb), + STAT_ITEM("tx_packets", txpacketcount_gb), + STAT_ITEM("tx_unicst_packets", txunicastpackets_gb), + STAT_ITEM("tx_broadcast_packets", txbroadcastpackets_gb), + STAT_ITEM("tx_multicast_packets", txmulticastpackets_gb), + STAT_ITEM("tx_pause_packets", txpausepackets), + STAT_ITEM("tx_up_to_64_byte_packets", tx64octets_gb), + STAT_ITEM("tx_65_to_127_byte_packets", tx65to127octets_gb), + STAT_ITEM("tx_128_to_255_byte_packets", tx128to255octets_gb), + STAT_ITEM("tx_256_to_511_byte_packets", tx256to511octets_gb), + STAT_ITEM("tx_512_to_1023_byte_packets", tx512to1023octets_gb), + STAT_ITEM("tx_1024_to_maxsize_packets", tx1024tomaxoctets_gb), + STAT_ITEM("tx_underflow_errors", txunderflowerror), + STAT_ITEM("tx_lpi_count", txlpitranscntr), + + STAT_ITEM("rx_bytes", rxoctetcount_gb), + STAT_ITEM("rx_packets", rxpacketcount_gb), + STAT_ITEM("rx_unicast_packets", rxunicastpackets_g), + STAT_ITEM("rx_broadcast_packets", rxbroadcastpackets_g), + STAT_ITEM("rx_multicast_packets", rxmulticastpackets_g), + STAT_ITEM("rx_vlan_packets", rxvlanpackets_gb), + STAT_ITEM("rx_pause_packets", rxpausepackets), + STAT_ITEM("rx_up_to_64_byte_packets", rx64octets_gb), + STAT_ITEM("rx_65_to_127_byte_packets", rx65to127octets_gb), + STAT_ITEM("rx_128_to_255_byte_packets", rx128to255octets_gb), + STAT_ITEM("rx_256_to_511_byte_packets", rx256to511octets_gb), + STAT_ITEM("rx_512_to_1023_byte_packets", rx512to1023octets_gb), + STAT_ITEM("rx_1024_to_maxsize_packets", rx1024tomaxoctets_gb), + STAT_ITEM("rx_fifo_overflow_errors", rxfifooverflow), + STAT_ITEM("rx_oversize_packets", rxoversize_g), + STAT_ITEM("rx_undersize_packets", rxundersize_g), + STAT_ITEM("rx_jabbers", rxjabbererror), + STAT_ITEM("rx_align_errors", rxalignmenterror), + STAT_ITEM("rx_crc_errors", rxcrcerror), + STAT_ITEM("rx_lpi_count", rxlpitranscntr), +}; + +/* Configuration of AXI bus parameters. + * These values depend on the parameters set on the MAC core as well + * as the AXI interconnect. + */ +struct dwceqos_bus_cfg { + /* Enable AXI low-power interface. */ + bool en_lpi; + /* Limit on number of outstanding AXI write requests. */ + u32 write_requests; + /* Limit on number of outstanding AXI read requests. */ + u32 read_requests; + /* Bitmap of allowed AXI burst lengths, 4-256 beats. */ + u32 burst_map; + /* DMA Programmable burst length*/ + u32 tx_pbl; + u32 rx_pbl; +}; + +struct dwceqos_flowcontrol { + int autoneg; + int rx; + int rx_current; + int tx; + int tx_current; +}; + +struct net_local { + void __iomem *baseaddr; + struct clk *phy_ref_clk; + struct clk *apb_pclk; + + struct device_node *phy_node; + struct net_device *ndev; + struct platform_device *pdev; + + u32 msg_enable; + + struct tasklet_struct tx_bdreclaim_tasklet; + struct workqueue_struct *txtimeout_handler_wq; + struct work_struct txtimeout_reinit; + + phy_interface_t phy_interface; + struct phy_device *phy_dev; + struct mii_bus *mii_bus; + + unsigned int link; + unsigned int speed; + unsigned int duplex; + + struct napi_struct napi; + + /* DMA Descriptor Areas */ + struct ring_desc *rx_skb; + struct ring_desc *tx_skb; + + struct dwceqos_dma_desc *tx_descs; + struct dwceqos_dma_desc *rx_descs; + + /* DMA Mapped Descriptor areas*/ + dma_addr_t tx_descs_addr; + dma_addr_t rx_descs_addr; + dma_addr_t tx_descs_tail_addr; + dma_addr_t rx_descs_tail_addr; + + size_t tx_free; + size_t tx_next; + size_t rx_cur; + size_t tx_cur; + + /* Spinlocks for accessing DMA Descriptors */ + spinlock_t tx_lock; + + /* Spinlock for register read-modify-writes. */ + spinlock_t hw_lock; + + u32 feature0; + u32 feature1; + u32 feature2; + + struct dwceqos_bus_cfg bus_cfg; + bool en_tx_lpi_clockgating; + + int eee_enabled; + int eee_active; + int csr_val; + u32 gso_size; + + struct dwceqos_mmc_counters mmc_counters; + /* Protect the mmc_counter updates. */ + spinlock_t stats_lock; + u32 mmc_rx_counters_mask; + u32 mmc_tx_counters_mask; + + struct dwceqos_flowcontrol flowcontrol; +}; + +static void dwceqos_read_mmc_counters(struct net_local *lp, u32 rx_mask, + u32 tx_mask); + +static void dwceqos_set_umac_addr(struct net_local *lp, unsigned char *addr, + unsigned int reg_n); +static int dwceqos_stop(struct net_device *ndev); +static int dwceqos_open(struct net_device *ndev); +static void dwceqos_tx_poll_demand(struct net_local *lp); + +static void dwceqos_set_rx_flowcontrol(struct net_local *lp, bool enable); +static void dwceqos_set_tx_flowcontrol(struct net_local *lp, bool enable); + +static void dwceqos_reset_state(struct net_local *lp); + +#define dwceqos_read(lp, reg) \ + readl_relaxed(((void __iomem *)((lp)->baseaddr)) + (reg)) +#define dwceqos_write(lp, reg, val) \ + writel_relaxed((val), ((void __iomem *)((lp)->baseaddr)) + (reg)) + +static void dwceqos_reset_state(struct net_local *lp) +{ + lp->link = 0; + lp->speed = 0; + lp->duplex = DUPLEX_UNKNOWN; + lp->flowcontrol.rx_current = 0; + lp->flowcontrol.tx_current = 0; + lp->eee_active = 0; + lp->eee_enabled = 0; +} + +static void print_descriptor(struct net_local *lp, int index, int tx) +{ + struct dwceqos_dma_desc *dd; + + if (tx) + dd = (struct dwceqos_dma_desc *)&lp->tx_descs[index]; + else + dd = (struct dwceqos_dma_desc *)&lp->rx_descs[index]; + + pr_info("%s DMA Descriptor #%d@%p Contents:\n", tx ? "TX" : "RX", + index, dd); + pr_info("0x%08x 0x%08x 0x%08x 0x%08x\n", dd->des0, dd->des1, dd->des2, + dd->des3); +} + +static void print_status(struct net_local *lp) +{ + size_t desci, i; + + pr_info("tx_free %zu, tx_cur %zu, tx_next %zu\n", lp->tx_free, + lp->tx_cur, lp->tx_next); + + print_descriptor(lp, lp->rx_cur, 0); + + for (desci = (lp->tx_cur - 10) % DWCEQOS_TX_DCNT, i = 0; + i < DWCEQOS_TX_DCNT; + ++i) { + print_descriptor(lp, desci, 1); + desci = (desci + 1) % DWCEQOS_TX_DCNT; + } + + pr_info("DMA_Debug_Status0: 0x%08x\n", + dwceqos_read(lp, REG_DWCEQOS_DMA_DEBUG_ST0)); + pr_info("DMA_CH0_Status: 0x%08x\n", + dwceqos_read(lp, REG_DWCEQOS_DMA_IS)); + pr_info("DMA_CH0_Current_App_TxDesc: 0x%08x\n", + dwceqos_read(lp, 0x1144)); + pr_info("DMA_CH0_Current_App_TxBuff: 0x%08x\n", + dwceqos_read(lp, 0x1154)); + pr_info("MTL_Debug_Status: 0x%08x\n", + dwceqos_read(lp, REG_DWCEQOS_MTL_DEBUG_ST)); + pr_info("MTL_TXQ0_Debug_Status: 0x%08x\n", + dwceqos_read(lp, REG_DWCEQOS_MTL_TXQ0_DEBUG_ST)); + pr_info("MTL_RXQ0_Debug_Status: 0x%08x\n", + dwceqos_read(lp, REG_DWCEQOS_MTL_RXQ0_DEBUG_ST)); + pr_info("Current TX DMA: 0x%08x, RX DMA: 0x%08x\n", + dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_CUR_TXDESC), + dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_CUR_RXDESC)); +} + +static void dwceqos_mdio_set_csr(struct net_local *lp) +{ + int rate = clk_get_rate(lp->apb_pclk); + + if (rate <= 20000000) + lp->csr_val = DWCEQOS_MAC_MDIO_ADDR_CR_20; + else if (rate <= 35000000) + lp->csr_val = DWCEQOS_MAC_MDIO_ADDR_CR_35; + else if (rate <= 60000000) + lp->csr_val = DWCEQOS_MAC_MDIO_ADDR_CR_60; + else if (rate <= 100000000) + lp->csr_val = DWCEQOS_MAC_MDIO_ADDR_CR_100; + else if (rate <= 150000000) + lp->csr_val = DWCEQOS_MAC_MDIO_ADDR_CR_150; + else if (rate <= 250000000) + lp->csr_val = DWCEQOS_MAC_MDIO_ADDR_CR_250; +} + +/* Simple MDIO functions implementing mii_bus */ +static int dwceqos_mdio_read(struct mii_bus *bus, int mii_id, int phyreg) +{ + struct net_local *lp = bus->priv; + u32 regval; + int i; + int data; + + regval = DWCEQOS_MDIO_PHYADDR(mii_id) | + DWCEQOS_MDIO_PHYREG(phyreg) | + DWCEQOS_MAC_MDIO_ADDR_CR(lp->csr_val) | + DWCEQOS_MAC_MDIO_ADDR_GB | + DWCEQOS_MAC_MDIO_ADDR_GOC_READ; + dwceqos_write(lp, REG_DWCEQOS_MAC_MDIO_ADDR, regval); + + for (i = 0; i < 5; ++i) { + usleep_range(64, 128); + if (!(dwceqos_read(lp, REG_DWCEQOS_MAC_MDIO_ADDR) & + DWCEQOS_MAC_MDIO_ADDR_GB)) + break; + } + + data = dwceqos_read(lp, REG_DWCEQOS_MAC_MDIO_DATA); + if (i == 5) { + netdev_warn(lp->ndev, "MDIO read timed out\n"); + data = 0xffff; + } + + return data & 0xffff; +} + +static int dwceqos_mdio_write(struct mii_bus *bus, int mii_id, int phyreg, + u16 value) +{ + struct net_local *lp = bus->priv; + u32 regval; + int i; + + dwceqos_write(lp, REG_DWCEQOS_MAC_MDIO_DATA, value); + + regval = DWCEQOS_MDIO_PHYADDR(mii_id) | + DWCEQOS_MDIO_PHYREG(phyreg) | + DWCEQOS_MAC_MDIO_ADDR_CR(lp->csr_val) | + DWCEQOS_MAC_MDIO_ADDR_GB | + DWCEQOS_MAC_MDIO_ADDR_GOC_WRITE; + dwceqos_write(lp, REG_DWCEQOS_MAC_MDIO_ADDR, regval); + + for (i = 0; i < 5; ++i) { + usleep_range(64, 128); + if (!(dwceqos_read(lp, REG_DWCEQOS_MAC_MDIO_ADDR) & + DWCEQOS_MAC_MDIO_ADDR_GB)) + break; + } + if (i == 5) + netdev_warn(lp->ndev, "MDIO write timed out\n"); + return 0; +} + +static int dwceqos_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) +{ + struct net_local *lp = netdev_priv(ndev); + struct phy_device *phydev = lp->phy_dev; + + if (!netif_running(ndev)) + return -EINVAL; + + if (!phydev) + return -ENODEV; + + switch (cmd) { + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + return phy_mii_ioctl(phydev, rq, cmd); + default: + dev_info(&lp->pdev->dev, "ioctl %X not implemented.\n", cmd); + return -EOPNOTSUPP; + } +} + +static void dwceqos_link_down(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + + /* Indicate link down to the LPI state machine */ + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + regval &= ~DWCEQOS_MAC_LPI_CTRL_STATUS_PLS; + dwceqos_write(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_link_up(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + + /* Indicate link up to the LPI state machine */ + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + regval |= DWCEQOS_MAC_LPI_CTRL_STATUS_PLS; + dwceqos_write(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); + + lp->eee_active = !phy_init_eee(lp->phy_dev, 0); + + /* Check for changed EEE capability */ + if (!lp->eee_active && lp->eee_enabled) { + lp->eee_enabled = 0; + + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + regval &= ~DWCEQOS_LPI_CTRL_ENABLE_EEE; + dwceqos_write(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); + } +} + +static void dwceqos_set_speed(struct net_local *lp) +{ + struct phy_device *phydev = lp->phy_dev; + u32 regval; + + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_CFG); + regval &= ~(DWCEQOS_MAC_CFG_PS | DWCEQOS_MAC_CFG_FES | + DWCEQOS_MAC_CFG_DM); + + if (phydev->duplex) + regval |= DWCEQOS_MAC_CFG_DM; + if (phydev->speed == SPEED_10) { + regval |= DWCEQOS_MAC_CFG_PS; + } else if (phydev->speed == SPEED_100) { + regval |= DWCEQOS_MAC_CFG_PS | + DWCEQOS_MAC_CFG_FES; + } else if (phydev->speed != SPEED_1000) { + netdev_err(lp->ndev, + "unknown PHY speed %d\n", + phydev->speed); + return; + } + + dwceqos_write(lp, REG_DWCEQOS_MAC_CFG, regval); +} + +static void dwceqos_adjust_link(struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + struct phy_device *phydev = lp->phy_dev; + int status_change = 0; + + if (phydev->link) { + if ((lp->speed != phydev->speed) || + (lp->duplex != phydev->duplex)) { + dwceqos_set_speed(lp); + + lp->speed = phydev->speed; + lp->duplex = phydev->duplex; + status_change = 1; + } + + if (lp->flowcontrol.autoneg) { + lp->flowcontrol.rx = phydev->pause || + phydev->asym_pause; + lp->flowcontrol.tx = phydev->pause || + phydev->asym_pause; + } + + if (lp->flowcontrol.rx != lp->flowcontrol.rx_current) { + if (netif_msg_link(lp)) + netdev_dbg(ndev, "set rx flow to %d\n", + lp->flowcontrol.rx); + dwceqos_set_rx_flowcontrol(lp, lp->flowcontrol.rx); + lp->flowcontrol.rx_current = lp->flowcontrol.rx; + } + if (lp->flowcontrol.tx != lp->flowcontrol.tx_current) { + if (netif_msg_link(lp)) + netdev_dbg(ndev, "set tx flow to %d\n", + lp->flowcontrol.tx); + dwceqos_set_tx_flowcontrol(lp, lp->flowcontrol.tx); + lp->flowcontrol.tx_current = lp->flowcontrol.tx; + } + } + + if (phydev->link != lp->link) { + lp->link = phydev->link; + status_change = 1; + } + + if (status_change) { + if (phydev->link) { + lp->ndev->trans_start = jiffies; + dwceqos_link_up(lp); + } else { + dwceqos_link_down(lp); + } + phy_print_status(phydev); + } +} + +static int dwceqos_mii_probe(struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + struct phy_device *phydev = NULL; + + if (lp->phy_node) { + phydev = of_phy_connect(lp->ndev, + lp->phy_node, + &dwceqos_adjust_link, + 0, + lp->phy_interface); + + if (!phydev) { + netdev_err(ndev, "no PHY found\n"); + return -1; + } + } else { + netdev_err(ndev, "no PHY configured\n"); + return -ENODEV; + } + + if (netif_msg_probe(lp)) + netdev_dbg(lp->ndev, + "phydev %p, phydev->phy_id 0xa%x, phydev->addr 0x%x\n", + phydev, phydev->phy_id, phydev->addr); + + phydev->supported &= PHY_GBIT_FEATURES; + + lp->link = 0; + lp->speed = 0; + lp->duplex = DUPLEX_UNKNOWN; + lp->phy_dev = phydev; + + if (netif_msg_probe(lp)) { + netdev_dbg(lp->ndev, "phy_addr 0x%x, phy_id 0x%08x\n", + lp->phy_dev->addr, lp->phy_dev->phy_id); + + netdev_dbg(lp->ndev, "attach [%s] phy driver\n", + lp->phy_dev->drv->name); + } + + return 0; +} + +static void dwceqos_alloc_rxring_desc(struct net_local *lp, int index) +{ + struct sk_buff *new_skb; + dma_addr_t new_skb_baddr = 0; + + new_skb = netdev_alloc_skb(lp->ndev, DWCEQOS_RX_BUF_SIZE); + if (!new_skb) { + netdev_err(lp->ndev, "alloc_skb error for desc %d\n", index); + goto err_out; + } + + new_skb_baddr = dma_map_single(lp->ndev->dev.parent, + new_skb->data, DWCEQOS_RX_BUF_SIZE, + DMA_FROM_DEVICE); + if (dma_mapping_error(lp->ndev->dev.parent, new_skb_baddr)) { + netdev_err(lp->ndev, "DMA map error\n"); + dev_kfree_skb(new_skb); + new_skb = NULL; + goto err_out; + } + + lp->rx_descs[index].des0 = new_skb_baddr; + lp->rx_descs[index].des1 = 0; + lp->rx_descs[index].des2 = 0; + lp->rx_descs[index].des3 = DWCEQOS_DMA_RDES3_INTE | + DWCEQOS_DMA_RDES3_BUF1V | + DWCEQOS_DMA_RDES3_OWN; + + lp->rx_skb[index].mapping = new_skb_baddr; + lp->rx_skb[index].len = DWCEQOS_RX_BUF_SIZE; + +err_out: + lp->rx_skb[index].skb = new_skb; +} + +static void dwceqos_clean_rings(struct net_local *lp) +{ + int i; + + if (lp->rx_skb) { + for (i = 0; i < DWCEQOS_RX_DCNT; i++) { + if (lp->rx_skb[i].skb) { + dma_unmap_single(lp->ndev->dev.parent, + lp->rx_skb[i].mapping, + lp->rx_skb[i].len, + DMA_FROM_DEVICE); + + dev_kfree_skb(lp->rx_skb[i].skb); + lp->rx_skb[i].skb = NULL; + lp->rx_skb[i].mapping = 0; + } + } + } + + if (lp->tx_skb) { + for (i = 0; i < DWCEQOS_TX_DCNT; i++) { + if (lp->tx_skb[i].skb) { + dev_kfree_skb(lp->tx_skb[i].skb); + lp->tx_skb[i].skb = NULL; + } + if (lp->tx_skb[i].mapping) { + dma_unmap_single(lp->ndev->dev.parent, + lp->tx_skb[i].mapping, + lp->tx_skb[i].len, + DMA_TO_DEVICE); + lp->tx_skb[i].mapping = 0; + } + } + } +} + +static void dwceqos_descriptor_free(struct net_local *lp) +{ + int size; + + dwceqos_clean_rings(lp); + + kfree(lp->tx_skb); + lp->tx_skb = NULL; + kfree(lp->rx_skb); + lp->rx_skb = NULL; + + size = DWCEQOS_RX_DCNT * sizeof(struct dwceqos_dma_desc); + if (lp->rx_descs) { + dma_free_coherent(lp->ndev->dev.parent, size, + (void *)(lp->rx_descs), lp->rx_descs_addr); + lp->rx_descs = NULL; + } + + size = DWCEQOS_TX_DCNT * sizeof(struct dwceqos_dma_desc); + if (lp->tx_descs) { + dma_free_coherent(lp->ndev->dev.parent, size, + (void *)(lp->tx_descs), lp->tx_descs_addr); + lp->tx_descs = NULL; + } +} + +static int dwceqos_descriptor_init(struct net_local *lp) +{ + int size; + u32 i; + + lp->gso_size = 0; + + lp->tx_skb = NULL; + lp->rx_skb = NULL; + lp->rx_descs = NULL; + lp->tx_descs = NULL; + + /* Reset the DMA indexes */ + lp->rx_cur = 0; + lp->tx_cur = 0; + lp->tx_next = 0; + lp->tx_free = DWCEQOS_TX_DCNT; + + /* Allocate Ring descriptors */ + size = DWCEQOS_RX_DCNT * sizeof(struct ring_desc); + lp->rx_skb = kzalloc(size, GFP_KERNEL); + if (!lp->rx_skb) + goto err_out; + + size = DWCEQOS_TX_DCNT * sizeof(struct ring_desc); + lp->tx_skb = kzalloc(size, GFP_KERNEL); + if (!lp->tx_skb) + goto err_out; + + /* Allocate DMA descriptors */ + size = DWCEQOS_RX_DCNT * sizeof(struct dwceqos_dma_desc); + lp->rx_descs = dma_alloc_coherent(lp->ndev->dev.parent, size, + &lp->rx_descs_addr, 0); + if (!lp->rx_descs) + goto err_out; + lp->rx_descs_tail_addr = lp->rx_descs_addr + + sizeof(struct dwceqos_dma_desc) * DWCEQOS_RX_DCNT; + + size = DWCEQOS_TX_DCNT * sizeof(struct dwceqos_dma_desc); + lp->tx_descs = dma_alloc_coherent(lp->ndev->dev.parent, size, + &lp->tx_descs_addr, 0); + if (!lp->tx_descs) + goto err_out; + lp->tx_descs_tail_addr = lp->tx_descs_addr + + sizeof(struct dwceqos_dma_desc) * DWCEQOS_TX_DCNT; + + /* Initialize RX Ring Descriptors and buffers */ + for (i = 0; i < DWCEQOS_RX_DCNT; ++i) { + dwceqos_alloc_rxring_desc(lp, i); + if (!(lp->rx_skb[lp->rx_cur].skb)) + goto err_out; + } + + /* Initialize TX Descriptors */ + for (i = 0; i < DWCEQOS_TX_DCNT; ++i) { + lp->tx_descs[i].des0 = 0; + lp->tx_descs[i].des1 = 0; + lp->tx_descs[i].des2 = 0; + lp->tx_descs[i].des3 = 0; + } + + /* Make descriptor writes visible to the DMA. */ + wmb(); + + return 0; + +err_out: + dwceqos_descriptor_free(lp); + return -ENOMEM; +} + +static int dwceqos_packet_avail(struct net_local *lp) +{ + return !(lp->rx_descs[lp->rx_cur].des3 & DWCEQOS_DMA_RDES3_OWN); +} + +static void dwceqos_get_hwfeatures(struct net_local *lp) +{ + lp->feature0 = dwceqos_read(lp, REG_DWCEQOS_MAC_HW_FEATURE0); + lp->feature1 = dwceqos_read(lp, REG_DWCEQOS_MAC_HW_FEATURE1); + lp->feature2 = dwceqos_read(lp, REG_DWCEQOS_MAC_HW_FEATURE2); +} + +static void dwceqos_dma_enable_txirq(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_IE); + regval |= DWCEQOS_DMA_CH0_IE_TIE; + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_IE, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_dma_disable_txirq(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_IE); + regval &= ~DWCEQOS_DMA_CH0_IE_TIE; + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_IE, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_dma_enable_rxirq(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_IE); + regval |= DWCEQOS_DMA_CH0_IE_RIE; + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_IE, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_dma_disable_rxirq(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_IE); + regval &= ~DWCEQOS_DMA_CH0_IE_RIE; + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_IE, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_enable_mmc_interrupt(struct net_local *lp) +{ + dwceqos_write(lp, REG_DWCEQOS_MMC_RXIRQMASK, 0); + dwceqos_write(lp, REG_DWCEQOS_MMC_TXIRQMASK, 0); +} + +static int dwceqos_mii_init(struct net_local *lp) +{ + int ret = -ENXIO, i; + struct resource res; + struct device_node *mdionode; + + mdionode = of_get_child_by_name(lp->pdev->dev.of_node, "mdio"); + + if (!mdionode) + return 0; + + lp->mii_bus = mdiobus_alloc(); + if (!lp->mii_bus) { + ret = -ENOMEM; + goto err_out; + } + + lp->mii_bus->name = "DWCEQOS MII bus"; + lp->mii_bus->read = &dwceqos_mdio_read; + lp->mii_bus->write = &dwceqos_mdio_write; + lp->mii_bus->priv = lp; + lp->mii_bus->parent = &lp->ndev->dev; + + lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); + if (!lp->mii_bus->irq) { + ret = -ENOMEM; + goto err_out_free_mdiobus; + } + + for (i = 0; i < PHY_MAX_ADDR; i++) + lp->mii_bus->irq[i] = PHY_POLL; + of_address_to_resource(lp->pdev->dev.of_node, 0, &res); + snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%.8llx", + (unsigned long long)res.start); + if (of_mdiobus_register(lp->mii_bus, mdionode)) + goto err_out_free_mdio_irq; + + return 0; + +err_out_free_mdio_irq: + kfree(lp->mii_bus->irq); +err_out_free_mdiobus: + mdiobus_free(lp->mii_bus); +err_out: + of_node_put(mdionode); + return ret; +} + +/* DMA reset. When issued also resets all MTL and MAC registers as well */ +static void dwceqos_reset_hw(struct net_local *lp) +{ + /* Wait (at most) 0.5 seconds for DMA reset*/ + int i = 5000; + u32 reg; + + /* Force gigabit to guarantee a TX clock for GMII. */ + reg = dwceqos_read(lp, REG_DWCEQOS_MAC_CFG); + reg &= ~(DWCEQOS_MAC_CFG_PS | DWCEQOS_MAC_CFG_FES); + reg |= DWCEQOS_MAC_CFG_DM; + dwceqos_write(lp, REG_DWCEQOS_MAC_CFG, reg); + + dwceqos_write(lp, REG_DWCEQOS_DMA_MODE, DWCEQOS_DMA_MODE_SWR); + + do { + udelay(100); + i--; + reg = dwceqos_read(lp, REG_DWCEQOS_DMA_MODE); + } while ((reg & DWCEQOS_DMA_MODE_SWR) && i); + /* We might experience a timeout if the chip clock mux is broken */ + if (!i) + netdev_err(lp->ndev, "DMA reset timed out!\n"); +} + +static void dwceqos_fatal_bus_error(struct net_local *lp, u32 dma_status) +{ + if (dma_status & DWCEQOS_DMA_CH0_IS_TEB) { + netdev_err(lp->ndev, "txdma bus error %s %s (status=%08x)\n", + dma_status & DWCEQOS_DMA_CH0_IS_TX_ERR_READ ? + "read" : "write", + dma_status & DWCEQOS_DMA_CH0_IS_TX_ERR_DESCR ? + "descr" : "data", + dma_status); + + print_status(lp); + } + if (dma_status & DWCEQOS_DMA_CH0_IS_REB) { + netdev_err(lp->ndev, "rxdma bus error %s %s (status=%08x)\n", + dma_status & DWCEQOS_DMA_CH0_IS_RX_ERR_READ ? + "read" : "write", + dma_status & DWCEQOS_DMA_CH0_IS_RX_ERR_DESCR ? + "descr" : "data", + dma_status); + + print_status(lp); + } +} + +static void dwceqos_mmc_interrupt(struct net_local *lp) +{ + unsigned long flags; + + spin_lock_irqsave(&lp->stats_lock, flags); + + /* A latched mmc interrupt can not be masked, we must read + * all the counters with an interrupt pending. + */ + dwceqos_read_mmc_counters(lp, + dwceqos_read(lp, REG_DWCEQOS_MMC_RXIRQ), + dwceqos_read(lp, REG_DWCEQOS_MMC_TXIRQ)); + + spin_unlock_irqrestore(&lp->stats_lock, flags); +} + +static void dwceqos_mac_interrupt(struct net_local *lp) +{ + u32 cause; + + cause = dwceqos_read(lp, REG_DWCEQOS_MAC_IS); + + if (cause & DWCEQOS_MAC_IS_MMC_INT) + dwceqos_mmc_interrupt(lp); +} + +static irqreturn_t dwceqos_interrupt(int irq, void *dev_id) +{ + struct net_device *ndev = dev_id; + struct net_local *lp = netdev_priv(ndev); + + u32 cause; + u32 dma_status; + irqreturn_t ret = IRQ_NONE; + + cause = dwceqos_read(lp, REG_DWCEQOS_DMA_IS); + /* DMA Channel 0 Interrupt */ + if (cause & DWCEQOS_DMA_IS_DC0IS) { + dma_status = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_STA); + + /* Transmit Interrupt */ + if (dma_status & DWCEQOS_DMA_CH0_IS_TI) { + tasklet_schedule(&lp->tx_bdreclaim_tasklet); + dwceqos_dma_disable_txirq(lp); + } + + /* Receive Interrupt */ + if (dma_status & DWCEQOS_DMA_CH0_IS_RI) { + /* Disable RX IRQs */ + dwceqos_dma_disable_rxirq(lp); + napi_schedule(&lp->napi); + } + + /* Fatal Bus Error interrupt */ + if (unlikely(dma_status & DWCEQOS_DMA_CH0_IS_FBE)) { + dwceqos_fatal_bus_error(lp, dma_status); + + /* errata 9000831707 */ + dma_status |= DWCEQOS_DMA_CH0_IS_TEB | + DWCEQOS_DMA_CH0_IS_REB; + } + + /* Ack all DMA Channel 0 IRQs */ + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_STA, dma_status); + ret = IRQ_HANDLED; + } + + if (cause & DWCEQOS_DMA_IS_MTLIS) { + u32 val = dwceqos_read(lp, REG_DWCEQOS_MTL_Q0_ISCTRL); + + dwceqos_write(lp, REG_DWCEQOS_MTL_Q0_ISCTRL, val); + ret = IRQ_HANDLED; + } + + if (cause & DWCEQOS_DMA_IS_MACIS) { + dwceqos_mac_interrupt(lp); + ret = IRQ_HANDLED; + } + return ret; +} + +static void dwceqos_set_rx_flowcontrol(struct net_local *lp, bool enable) +{ + u32 regval; + unsigned long flags; + + spin_lock_irqsave(&lp->hw_lock, flags); + + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_RX_FLOW_CTRL); + if (enable) + regval |= DWCEQOS_MAC_RX_FLOW_CTRL_RFE; + else + regval &= ~DWCEQOS_MAC_RX_FLOW_CTRL_RFE; + dwceqos_write(lp, REG_DWCEQOS_MAC_RX_FLOW_CTRL, regval); + + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_set_tx_flowcontrol(struct net_local *lp, bool enable) +{ + u32 regval; + unsigned long flags; + + spin_lock_irqsave(&lp->hw_lock, flags); + + /* MTL flow control */ + regval = dwceqos_read(lp, REG_DWCEQOS_MTL_RXQ0_OPER); + if (enable) + regval |= DWCEQOS_MTL_RXQ_EHFC; + else + regval &= ~DWCEQOS_MTL_RXQ_EHFC; + + dwceqos_write(lp, REG_DWCEQOS_MTL_RXQ0_OPER, regval); + + /* MAC flow control */ + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_Q0_TX_FLOW); + if (enable) + regval |= DWCEQOS_MAC_Q0_TX_FLOW_TFE; + else + regval &= ~DWCEQOS_MAC_Q0_TX_FLOW_TFE; + dwceqos_write(lp, REG_DWCEQOS_MAC_Q0_TX_FLOW, regval); + + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_configure_flow_control(struct net_local *lp) +{ + u32 regval; + unsigned long flags; + int RQS, RFD, RFA; + + spin_lock_irqsave(&lp->hw_lock, flags); + + regval = dwceqos_read(lp, REG_DWCEQOS_MTL_RXQ0_OPER); + + /* The queue size is in units of 256 bytes. We want 512 bytes units for + * the threshold fields. + */ + RQS = ((regval >> 20) & 0x3FF) + 1; + RQS /= 2; + + /* The thresholds are relative to a full queue, with a bias + * of 1 KiByte below full. + */ + RFD = RQS / 2 - 2; + RFA = RQS / 8 - 2; + + regval = (regval & 0xFFF000FF) | (RFD << 14) | (RFA << 8); + + if (RFD >= 0 && RFA >= 0) { + dwceqos_write(lp, REG_DWCEQOS_MTL_RXQ0_OPER, regval); + } else { + netdev_warn(lp->ndev, + "FIFO too small for flow control."); + } + + regval = DWCEQOS_MAC_Q0_TX_FLOW_PT(256) | + DWCEQOS_MAC_Q0_TX_FLOW_PLT_4_SLOTS; + + dwceqos_write(lp, REG_DWCEQOS_MAC_Q0_TX_FLOW, regval); + + spin_unlock_irqrestore(&lp->hw_lock, flags); +} + +static void dwceqos_configure_clock(struct net_local *lp) +{ + unsigned long rate_mhz = clk_get_rate(lp->apb_pclk) / 1000000; + + BUG_ON(!rate_mhz); + + dwceqos_write(lp, + REG_DWCEQOS_MAC_1US_TIC_COUNTER, + DWCEQOS_MAC_1US_TIC_COUNTER_VAL(rate_mhz - 1)); +} + +static void dwceqos_configure_bus(struct net_local *lp) +{ + u32 sysbus_reg; + + /* N.B. We do not support the Fixed Burst mode because it + * opens a race window by making HW access to DMA descriptors + * non-atomic. + */ + + sysbus_reg = DWCEQOS_DMA_SYSBUS_MODE_AAL; + + if (lp->bus_cfg.en_lpi) + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_EN_LPI; + + if (lp->bus_cfg.burst_map) + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_BURST( + lp->bus_cfg.burst_map); + else + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_BURST( + DWCEQOS_DMA_SYSBUS_MODE_BURST_DEFAULT); + + if (lp->bus_cfg.read_requests) + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_RD_OSR_LIMIT( + lp->bus_cfg.read_requests - 1); + else + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_RD_OSR_LIMIT( + DWCEQOS_DMA_SYSBUS_MODE_RD_OSR_LIMIT_DEFAULT); + + if (lp->bus_cfg.write_requests) + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_WR_OSR_LIMIT( + lp->bus_cfg.write_requests - 1); + else + sysbus_reg |= DWCEQOS_DMA_SYSBUS_MODE_WR_OSR_LIMIT( + DWCEQOS_DMA_SYSBUS_MODE_WR_OSR_LIMIT_DEFAULT); + + if (netif_msg_hw(lp)) + netdev_dbg(lp->ndev, "SysbusMode %#X\n", sysbus_reg); + + dwceqos_write(lp, REG_DWCEQOS_DMA_SYSBUS_MODE, sysbus_reg); +} + +static void dwceqos_init_hw(struct net_local *lp) +{ + u32 regval; + u32 buswidth; + u32 dma_skip; + + /* Software reset */ + dwceqos_reset_hw(lp); + + dwceqos_configure_bus(lp); + + /* Probe data bus width, 32/64/128 bits. */ + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TXDESC_TAIL, 0xF); + regval = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_TXDESC_TAIL); + buswidth = (regval ^ 0xF) + 1; + + /* Cache-align dma descriptors. */ + dma_skip = (sizeof(struct dwceqos_dma_desc) - 16) / buswidth; + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_CTRL, + DWCEQOS_DMA_CH_CTRL_DSL(dma_skip) | + DWCEQOS_DMA_CH_CTRL_PBLX8); + + /* Initialize DMA Channel 0 */ + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TXDESC_LEN, DWCEQOS_TX_DCNT - 1); + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_RXDESC_LEN, DWCEQOS_RX_DCNT - 1); + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TXDESC_LIST, + (u32)lp->tx_descs_addr); + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_RXDESC_LIST, + (u32)lp->rx_descs_addr); + + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TXDESC_TAIL, + lp->tx_descs_tail_addr); + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_RXDESC_TAIL, + lp->rx_descs_tail_addr); + + if (lp->bus_cfg.tx_pbl) + regval = DWCEQOS_DMA_CH_CTRL_PBL(lp->bus_cfg.tx_pbl); + else + regval = DWCEQOS_DMA_CH_CTRL_PBL(2); + + /* Enable TSO if the HW support it */ + if (lp->feature1 & DWCEQOS_MAC_HW_FEATURE1_TSOEN) + regval |= DWCEQOS_DMA_CH_TX_TSE; + + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TX_CTRL, regval); + + if (lp->bus_cfg.rx_pbl) + regval = DWCEQOS_DMA_CH_CTRL_PBL(lp->bus_cfg.rx_pbl); + else + regval = DWCEQOS_DMA_CH_CTRL_PBL(2); + + regval |= DWCEQOS_DMA_CH_RX_CTRL_BUFSIZE(DWCEQOS_DWCEQOS_RX_BUF_SIZE); + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_RX_CTRL, regval); + + regval |= DWCEQOS_DMA_CH_CTRL_START; + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_RX_CTRL, regval); + + /* Initialize MTL Queues */ + regval = DWCEQOS_MTL_SCHALG_STRICT; + dwceqos_write(lp, REG_DWCEQOS_MTL_OPER, regval); + + regval = DWCEQOS_MTL_TXQ_SIZE( + DWCEQOS_MAC_HW_FEATURE1_TXFIFOSIZE(lp->feature1)) | + DWCEQOS_MTL_TXQ_TXQEN | DWCEQOS_MTL_TXQ_TSF | + DWCEQOS_MTL_TXQ_TTC512; + dwceqos_write(lp, REG_DWCEQOS_MTL_TXQ0_OPER, regval); + + regval = DWCEQOS_MTL_RXQ_SIZE( + DWCEQOS_MAC_HW_FEATURE1_RXFIFOSIZE(lp->feature1)) | + DWCEQOS_MTL_RXQ_FUP | DWCEQOS_MTL_RXQ_FEP | DWCEQOS_MTL_RXQ_RSF; + dwceqos_write(lp, REG_DWCEQOS_MTL_RXQ0_OPER, regval); + + dwceqos_configure_flow_control(lp); + + /* Initialize MAC */ + dwceqos_set_umac_addr(lp, lp->ndev->dev_addr, 0); + + lp->eee_enabled = 0; + + dwceqos_configure_clock(lp); + + /* MMC counters */ + + /* probe implemented counters */ + dwceqos_write(lp, REG_DWCEQOS_MMC_RXIRQMASK, ~0u); + dwceqos_write(lp, REG_DWCEQOS_MMC_TXIRQMASK, ~0u); + lp->mmc_rx_counters_mask = dwceqos_read(lp, REG_DWCEQOS_MMC_RXIRQMASK); + lp->mmc_tx_counters_mask = dwceqos_read(lp, REG_DWCEQOS_MMC_TXIRQMASK); + + dwceqos_write(lp, REG_DWCEQOS_MMC_CTRL, DWCEQOS_MMC_CTRL_CNTRST | + DWCEQOS_MMC_CTRL_RSTONRD); + dwceqos_enable_mmc_interrupt(lp); + + /* Enable Interrupts */ + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_IE, + DWCEQOS_DMA_CH0_IE_NIE | + DWCEQOS_DMA_CH0_IE_RIE | DWCEQOS_DMA_CH0_IE_TIE | + DWCEQOS_DMA_CH0_IE_AIE | + DWCEQOS_DMA_CH0_IE_FBEE); + + dwceqos_write(lp, REG_DWCEQOS_MAC_IE, 0); + + dwceqos_write(lp, REG_DWCEQOS_MAC_CFG, DWCEQOS_MAC_CFG_IPC | + DWCEQOS_MAC_CFG_DM | DWCEQOS_MAC_CFG_TE | DWCEQOS_MAC_CFG_RE); + + /* Start TX DMA */ + regval = dwceqos_read(lp, REG_DWCEQOS_DMA_CH0_TX_CTRL); + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TX_CTRL, + regval | DWCEQOS_DMA_CH_CTRL_START); + + /* Enable MAC TX/RX */ + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_CFG); + dwceqos_write(lp, REG_DWCEQOS_MAC_CFG, + regval | DWCEQOS_MAC_CFG_TE | DWCEQOS_MAC_CFG_RE); +} + +static void dwceqos_tx_reclaim(unsigned long data) +{ + struct net_device *ndev = (struct net_device *)data; + struct net_local *lp = netdev_priv(ndev); + unsigned int tx_bytes = 0; + unsigned int tx_packets = 0; + + spin_lock(&lp->tx_lock); + + while (lp->tx_free < DWCEQOS_TX_DCNT) { + struct dwceqos_dma_desc *dd = &lp->tx_descs[lp->tx_cur]; + struct ring_desc *rd = &lp->tx_skb[lp->tx_cur]; + + /* Descriptor still being held by DMA ? */ + if (dd->des3 & DWCEQOS_DMA_TDES3_OWN) + break; + + if (rd->mapping) + dma_unmap_single(ndev->dev.parent, rd->mapping, rd->len, + DMA_TO_DEVICE); + + if (unlikely(rd->skb)) { + ++tx_packets; + tx_bytes += rd->skb->len; + dev_consume_skb_any(rd->skb); + } + + rd->skb = NULL; + rd->mapping = 0; + lp->tx_free++; + lp->tx_cur = (lp->tx_cur + 1) % DWCEQOS_TX_DCNT; + + if ((dd->des3 & DWCEQOS_DMA_TDES3_LD) && + (dd->des3 & DWCEQOS_DMA_RDES3_ES)) { + if (netif_msg_tx_err(lp)) + netdev_err(ndev, "TX Error, TDES3 = 0x%x\n", + dd->des3); + if (netif_msg_hw(lp)) + print_status(lp); + } + } + spin_unlock(&lp->tx_lock); + + netdev_completed_queue(ndev, tx_packets, tx_bytes); + + dwceqos_dma_enable_txirq(lp); + netif_wake_queue(ndev); +} + +static int dwceqos_rx(struct net_local *lp, int budget) +{ + struct sk_buff *skb; + u32 tot_size = 0; + unsigned int n_packets = 0; + unsigned int n_descs = 0; + u32 len; + + struct dwceqos_dma_desc *dd; + struct sk_buff *new_skb; + dma_addr_t new_skb_baddr = 0; + + while (n_descs < budget) { + if (!dwceqos_packet_avail(lp)) + break; + + new_skb = netdev_alloc_skb(lp->ndev, DWCEQOS_RX_BUF_SIZE); + if (!new_skb) { + netdev_err(lp->ndev, "no memory for new sk_buff\n"); + break; + } + + /* Get dma handle of skb->data */ + new_skb_baddr = (u32)dma_map_single(lp->ndev->dev.parent, + new_skb->data, + DWCEQOS_RX_BUF_SIZE, + DMA_FROM_DEVICE); + if (dma_mapping_error(lp->ndev->dev.parent, new_skb_baddr)) { + netdev_err(lp->ndev, "DMA map error\n"); + dev_kfree_skb(new_skb); + break; + } + + /* Read descriptor data after reading owner bit. */ + dma_rmb(); + + dd = &lp->rx_descs[lp->rx_cur]; + len = DWCEQOS_DMA_RDES3_PL(dd->des3); + skb = lp->rx_skb[lp->rx_cur].skb; + + /* Unmap old buffer */ + dma_unmap_single(lp->ndev->dev.parent, + lp->rx_skb[lp->rx_cur].mapping, + lp->rx_skb[lp->rx_cur].len, DMA_FROM_DEVICE); + + /* Discard packet on reception error or bad checksum */ + if ((dd->des3 & DWCEQOS_DMA_RDES3_ES) || + (dd->des1 & DWCEQOS_DMA_RDES1_IPCE)) { + dev_kfree_skb(skb); + skb = NULL; + } else { + skb_put(skb, len); + skb->protocol = eth_type_trans(skb, lp->ndev); + switch (dd->des1 & DWCEQOS_DMA_RDES1_PT) { + case DWCEQOS_DMA_RDES1_PT_UDP: + case DWCEQOS_DMA_RDES1_PT_TCP: + case DWCEQOS_DMA_RDES1_PT_ICMP: + skb->ip_summed = CHECKSUM_UNNECESSARY; + break; + default: + skb->ip_summed = CHECKSUM_NONE; + break; + } + } + + if (unlikely(!skb)) { + if (netif_msg_rx_err(lp)) + netdev_dbg(lp->ndev, "rx error: des3=%X\n", + lp->rx_descs[lp->rx_cur].des3); + } else { + tot_size += skb->len; + n_packets++; + + netif_receive_skb(skb); + } + + lp->rx_descs[lp->rx_cur].des0 = new_skb_baddr; + lp->rx_descs[lp->rx_cur].des1 = 0; + lp->rx_descs[lp->rx_cur].des2 = 0; + /* The DMA must observe des0/1/2 written before des3. */ + wmb(); + lp->rx_descs[lp->rx_cur].des3 = DWCEQOS_DMA_RDES3_INTE | + DWCEQOS_DMA_RDES3_OWN | + DWCEQOS_DMA_RDES3_BUF1V; + + lp->rx_skb[lp->rx_cur].mapping = new_skb_baddr; + lp->rx_skb[lp->rx_cur].len = DWCEQOS_RX_BUF_SIZE; + lp->rx_skb[lp->rx_cur].skb = new_skb; + + n_descs++; + lp->rx_cur = (lp->rx_cur + 1) % DWCEQOS_RX_DCNT; + } + + /* Make sure any ownership update is written to the descriptors before + * DMA wakeup. + */ + wmb(); + + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_STA, DWCEQOS_DMA_CH0_IS_RI); + /* Wake up RX by writing tail pointer */ + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_RXDESC_TAIL, + lp->rx_descs_tail_addr); + + return n_descs; +} + +static int dwceqos_rx_poll(struct napi_struct *napi, int budget) +{ + struct net_local *lp = container_of(napi, struct net_local, napi); + int work_done = 0; + + work_done = dwceqos_rx(lp, budget - work_done); + + if (!dwceqos_packet_avail(lp) && work_done < budget) { + napi_complete(napi); + dwceqos_dma_enable_rxirq(lp); + } else { + work_done = budget; + } + + return work_done; +} + +/* Reinitialize function if a TX timed out */ +static void dwceqos_reinit_for_txtimeout(struct work_struct *data) +{ + struct net_local *lp = container_of(data, struct net_local, + txtimeout_reinit); + + netdev_err(lp->ndev, "transmit timeout %d s, resetting...\n", + DWCEQOS_TX_TIMEOUT); + + if (netif_msg_hw(lp)) + print_status(lp); + + rtnl_lock(); + dwceqos_stop(lp->ndev); + dwceqos_open(lp->ndev); + rtnl_unlock(); +} + +/* DT Probing function called by main probe */ +static inline int dwceqos_probe_config_dt(struct platform_device *pdev) +{ + struct net_device *ndev; + struct net_local *lp; + const void *mac_address; + struct dwceqos_bus_cfg *bus_cfg; + struct device_node *np = pdev->dev.of_node; + + ndev = platform_get_drvdata(pdev); + lp = netdev_priv(ndev); + bus_cfg = &lp->bus_cfg; + + /* Set the MAC address. */ + mac_address = of_get_mac_address(pdev->dev.of_node); + if (mac_address) + ether_addr_copy(ndev->dev_addr, mac_address); + + /* These are all optional parameters */ + lp->en_tx_lpi_clockgating = of_property_read_bool(np, + "snps,en-tx-lpi-clockgating"); + bus_cfg->en_lpi = of_property_read_bool(np, "snps,en-lpi"); + of_property_read_u32(np, "snps,write-requests", + &bus_cfg->write_requests); + of_property_read_u32(np, "snps,read-requests", &bus_cfg->read_requests); + of_property_read_u32(np, "snps,burst-map", &bus_cfg->burst_map); + of_property_read_u32(np, "snps,txpbl", &bus_cfg->tx_pbl); + of_property_read_u32(np, "snps,rxpbl", &bus_cfg->rx_pbl); + + netdev_dbg(ndev, "BusCfg: lpi:%u wr:%u rr:%u bm:%X rxpbl:%u txpbl:%d\n", + bus_cfg->en_lpi, + bus_cfg->write_requests, + bus_cfg->read_requests, + bus_cfg->burst_map, + bus_cfg->rx_pbl, + bus_cfg->tx_pbl); + + return 0; +} + +static int dwceqos_open(struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + int res; + + dwceqos_reset_state(lp); + res = dwceqos_descriptor_init(lp); + if (res) { + netdev_err(ndev, "Unable to allocate DMA memory, rc %d\n", res); + return res; + } + netdev_reset_queue(ndev); + + napi_enable(&lp->napi); + phy_start(lp->phy_dev); + dwceqos_init_hw(lp); + + netif_start_queue(ndev); + tasklet_enable(&lp->tx_bdreclaim_tasklet); + + return 0; +} + +static bool dweqos_is_tx_dma_suspended(struct net_local *lp) +{ + u32 reg; + + reg = dwceqos_read(lp, REG_DWCEQOS_DMA_DEBUG_ST0); + reg = DMA_GET_TX_STATE_CH0(reg); + + return reg == DMA_TX_CH_SUSPENDED; +} + +static void dwceqos_drain_dma(struct net_local *lp) +{ + /* Wait for all pending TX buffers to be sent. Upper limit based + * on max frame size on a 10 Mbit link. + */ + size_t limit = (DWCEQOS_TX_DCNT * 1250) / 100; + + while (!dweqos_is_tx_dma_suspended(lp) && limit--) + usleep_range(100, 200); +} + +static int dwceqos_stop(struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + + phy_stop(lp->phy_dev); + + tasklet_disable(&lp->tx_bdreclaim_tasklet); + netif_stop_queue(ndev); + napi_disable(&lp->napi); + + dwceqos_drain_dma(lp); + + netif_tx_lock(lp->ndev); + dwceqos_reset_hw(lp); + dwceqos_descriptor_free(lp); + netif_tx_unlock(lp->ndev); + + return 0; +} + +static void dwceqos_dmadesc_set_ctx(struct net_local *lp, + unsigned short gso_size) +{ + struct dwceqos_dma_desc *dd = &lp->tx_descs[lp->tx_next]; + + dd->des0 = 0; + dd->des1 = 0; + dd->des2 = gso_size; + dd->des3 = DWCEQOS_DMA_TDES3_CTXT | DWCEQOS_DMA_TDES3_TCMSSV; + + lp->tx_next = (lp->tx_next + 1) % DWCEQOS_TX_DCNT; +} + +static void dwceqos_tx_poll_demand(struct net_local *lp) +{ + dwceqos_write(lp, REG_DWCEQOS_DMA_CH0_TXDESC_TAIL, + lp->tx_descs_tail_addr); +} + +struct dwceqos_tx { + size_t nr_descriptors; + size_t initial_descriptor; + size_t last_descriptor; + size_t prev_gso_size; + size_t network_header_len; +}; + +static void dwceqos_tx_prepare(struct sk_buff *skb, struct net_local *lp, + struct dwceqos_tx *tx) +{ + size_t n = 1; + size_t i; + + if (skb_is_gso(skb) && skb_shinfo(skb)->gso_size != lp->gso_size) + ++n; + + for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { + skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + + n += (skb_frag_size(frag) + BYTES_PER_DMA_DESC - 1) / + BYTES_PER_DMA_DESC; + } + + tx->nr_descriptors = n; + tx->initial_descriptor = lp->tx_next; + tx->last_descriptor = lp->tx_next; + tx->prev_gso_size = lp->gso_size; + + tx->network_header_len = skb_transport_offset(skb); + if (skb_is_gso(skb)) + tx->network_header_len += tcp_hdrlen(skb); +} + +static int dwceqos_tx_linear(struct sk_buff *skb, struct net_local *lp, + struct dwceqos_tx *tx) +{ + struct ring_desc *rd; + struct dwceqos_dma_desc *dd; + size_t payload_len; + dma_addr_t dma_handle; + + if (skb_is_gso(skb) && skb_shinfo(skb)->gso_size != lp->gso_size) { + dwceqos_dmadesc_set_ctx(lp, skb_shinfo(skb)->gso_size); + lp->gso_size = skb_shinfo(skb)->gso_size; + } + + dma_handle = dma_map_single(lp->ndev->dev.parent, skb->data, + skb_headlen(skb), DMA_TO_DEVICE); + + if (dma_mapping_error(lp->ndev->dev.parent, dma_handle)) { + netdev_err(lp->ndev, "TX DMA Mapping error\n"); + return -ENOMEM; + } + + rd = &lp->tx_skb[lp->tx_next]; + dd = &lp->tx_descs[lp->tx_next]; + + rd->skb = NULL; + rd->len = skb_headlen(skb); + rd->mapping = dma_handle; + + /* Set up DMA Descriptor */ + dd->des0 = dma_handle; + + if (skb_is_gso(skb)) { + payload_len = skb_headlen(skb) - tx->network_header_len; + + if (payload_len) + dd->des1 = dma_handle + tx->network_header_len; + dd->des2 = tx->network_header_len | + DWCEQOS_DMA_DES2_B2L(payload_len); + dd->des3 = DWCEQOS_DMA_TDES3_TSE | + DWCEQOS_DMA_DES3_THL((tcp_hdrlen(skb) / 4)) | + (skb->len - tx->network_header_len); + } else { + dd->des1 = 0; + dd->des2 = skb_headlen(skb); + dd->des3 = skb->len; + + switch (skb->ip_summed) { + case CHECKSUM_PARTIAL: + dd->des3 |= DWCEQOS_DMA_TDES3_CA; + case CHECKSUM_NONE: + case CHECKSUM_UNNECESSARY: + case CHECKSUM_COMPLETE: + default: + break; + } + } + + dd->des3 |= DWCEQOS_DMA_TDES3_FD; + if (lp->tx_next != tx->initial_descriptor) + dd->des3 |= DWCEQOS_DMA_TDES3_OWN; + + tx->last_descriptor = lp->tx_next; + lp->tx_next = (lp->tx_next + 1) % DWCEQOS_TX_DCNT; + + return 0; +} + +static int dwceqos_tx_frags(struct sk_buff *skb, struct net_local *lp, + struct dwceqos_tx *tx) +{ + struct ring_desc *rd = NULL; + struct dwceqos_dma_desc *dd; + dma_addr_t dma_handle; + size_t i; + + /* Setup more ring and DMA descriptor if the packet is fragmented */ + for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { + skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + size_t frag_size; + size_t consumed_size; + + /* Map DMA Area */ + dma_handle = skb_frag_dma_map(lp->ndev->dev.parent, frag, 0, + skb_frag_size(frag), + DMA_TO_DEVICE); + if (dma_mapping_error(lp->ndev->dev.parent, dma_handle)) { + netdev_err(lp->ndev, "DMA Mapping error\n"); + return -ENOMEM; + } + + /* order-3 fragments span more than one descriptor. */ + frag_size = skb_frag_size(frag); + consumed_size = 0; + while (consumed_size < frag_size) { + size_t dma_size = min_t(size_t, 16376, + frag_size - consumed_size); + + rd = &lp->tx_skb[lp->tx_next]; + memset(rd, 0, sizeof(*rd)); + + dd = &lp->tx_descs[lp->tx_next]; + + /* Set DMA Descriptor fields */ + dd->des0 = dma_handle; + dd->des1 = 0; + dd->des2 = dma_size; + + if (skb_is_gso(skb)) + dd->des3 = (skb->len - tx->network_header_len); + else + dd->des3 = skb->len; + + dd->des3 |= DWCEQOS_DMA_TDES3_OWN; + + tx->last_descriptor = lp->tx_next; + lp->tx_next = (lp->tx_next + 1) % DWCEQOS_TX_DCNT; + consumed_size += dma_size; + } + + rd->len = skb_frag_size(frag); + rd->mapping = dma_handle; + } + + return 0; +} + +static void dwceqos_tx_finalize(struct sk_buff *skb, struct net_local *lp, + struct dwceqos_tx *tx) +{ + lp->tx_descs[tx->last_descriptor].des3 |= DWCEQOS_DMA_TDES3_LD; + lp->tx_descs[tx->last_descriptor].des2 |= DWCEQOS_DMA_TDES2_IOC; + + lp->tx_skb[tx->last_descriptor].skb = skb; + + /* Make all descriptor updates visible to the DMA before setting the + * owner bit. + */ + wmb(); + + lp->tx_descs[tx->initial_descriptor].des3 |= DWCEQOS_DMA_TDES3_OWN; + + /* Make the owner bit visible before TX wakeup. */ + wmb(); + + dwceqos_tx_poll_demand(lp); +} + +static void dwceqos_tx_rollback(struct net_local *lp, struct dwceqos_tx *tx) +{ + size_t i = tx->initial_descriptor; + + while (i != lp->tx_next) { + if (lp->tx_skb[i].mapping) + dma_unmap_single(lp->ndev->dev.parent, + lp->tx_skb[i].mapping, + lp->tx_skb[i].len, + DMA_TO_DEVICE); + + lp->tx_skb[i].mapping = 0; + lp->tx_skb[i].skb = NULL; + + memset(&lp->tx_descs[i], 0, sizeof(lp->tx_descs[i])); + + i = (i + 1) % DWCEQOS_TX_DCNT; + } + + lp->tx_next = tx->initial_descriptor; + lp->gso_size = tx->prev_gso_size; +} + +static int dwceqos_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + struct dwceqos_tx trans; + int err; + + dwceqos_tx_prepare(skb, lp, &trans); + if (lp->tx_free < trans.nr_descriptors) { + netif_stop_queue(ndev); + return NETDEV_TX_BUSY; + } + + err = dwceqos_tx_linear(skb, lp, &trans); + if (err) + goto tx_error; + + err = dwceqos_tx_frags(skb, lp, &trans); + if (err) + goto tx_error; + + WARN_ON(lp->tx_next != + ((trans.initial_descriptor + trans.nr_descriptors) % + DWCEQOS_TX_DCNT)); + + dwceqos_tx_finalize(skb, lp, &trans); + + netdev_sent_queue(ndev, skb->len); + + spin_lock_bh(&lp->tx_lock); + lp->tx_free -= trans.nr_descriptors; + spin_unlock_bh(&lp->tx_lock); + + ndev->trans_start = jiffies; + return 0; + +tx_error: + dwceqos_tx_rollback(lp, &trans); + dev_kfree_skb(skb); + return 0; +} + +/* Set MAC address and then update HW accordingly */ +static int dwceqos_set_mac_address(struct net_device *ndev, void *addr) +{ + struct net_local *lp = netdev_priv(ndev); + struct sockaddr *hwaddr = (struct sockaddr *)addr; + + if (netif_running(ndev)) + return -EBUSY; + + if (!is_valid_ether_addr(hwaddr->sa_data)) + return -EADDRNOTAVAIL; + + memcpy(ndev->dev_addr, hwaddr->sa_data, ndev->addr_len); + + dwceqos_set_umac_addr(lp, lp->ndev->dev_addr, 0); + return 0; +} + +static void dwceqos_tx_timeout(struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + + queue_work(lp->txtimeout_handler_wq, &lp->txtimeout_reinit); +} + +static void dwceqos_set_umac_addr(struct net_local *lp, unsigned char *addr, + unsigned int reg_n) +{ + unsigned long data; + + data = (addr[5] << 8) | addr[4]; + dwceqos_write(lp, DWCEQOS_ADDR_HIGH(reg_n), + data | DWCEQOS_MAC_MAC_ADDR_HI_EN); + data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; + dwceqos_write(lp, DWCEQOS_ADDR_LOW(reg_n), data); +} + +static void dwceqos_disable_umac_addr(struct net_local *lp, unsigned int reg_n) +{ + /* Do not disable MAC address 0 */ + if (reg_n != 0) + dwceqos_write(lp, DWCEQOS_ADDR_HIGH(reg_n), 0); +} + +static void dwceqos_set_rx_mode(struct net_device *ndev) +{ + struct net_local *lp = netdev_priv(ndev); + u32 regval = 0; + u32 mc_filter[2]; + int reg = 1; + struct netdev_hw_addr *ha; + unsigned int max_mac_addr; + + max_mac_addr = DWCEQOS_MAX_PERFECT_ADDRESSES(lp->feature1); + + if (ndev->flags & IFF_PROMISC) { + regval = DWCEQOS_MAC_PKT_FILT_PR; + } else if (((netdev_mc_count(ndev) > DWCEQOS_HASH_TABLE_SIZE) || + (ndev->flags & IFF_ALLMULTI))) { + regval = DWCEQOS_MAC_PKT_FILT_PM; + dwceqos_write(lp, REG_DWCEQOS_HASTABLE_LO, 0xffffffff); + dwceqos_write(lp, REG_DWCEQOS_HASTABLE_HI, 0xffffffff); + } else if (!netdev_mc_empty(ndev)) { + regval = DWCEQOS_MAC_PKT_FILT_HMC; + memset(mc_filter, 0, sizeof(mc_filter)); + netdev_for_each_mc_addr(ha, ndev) { + /* The upper 6 bits of the calculated CRC are used to + * index the contens of the hash table + */ + int bit_nr = bitrev32(~crc32_le(~0, ha->addr, 6)) >> 26; + /* The most significant bit determines the register + * to use (H/L) while the other 5 bits determine + * the bit within the register. + */ + mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); + } + dwceqos_write(lp, REG_DWCEQOS_HASTABLE_LO, mc_filter[0]); + dwceqos_write(lp, REG_DWCEQOS_HASTABLE_HI, mc_filter[1]); + } + if (netdev_uc_count(ndev) > max_mac_addr) { + regval |= DWCEQOS_MAC_PKT_FILT_PR; + } else { + netdev_for_each_uc_addr(ha, ndev) { + dwceqos_set_umac_addr(lp, ha->addr, reg); + reg++; + } + for (; reg < DWCEQOS_MAX_PERFECT_ADDRESSES(lp->feature1); reg++) + dwceqos_disable_umac_addr(lp, reg); + } + dwceqos_write(lp, REG_DWCEQOS_MAC_PKT_FILT, regval); +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void dwceqos_poll_controller(struct net_device *ndev) +{ + disable_irq(ndev->irq); + dwceqos_interrupt(ndev->irq, ndev); + enable_irq(ndev->irq); +} +#endif + +static void dwceqos_read_mmc_counters(struct net_local *lp, u32 rx_mask, + u32 tx_mask) +{ + if (tx_mask & BIT(27)) + lp->mmc_counters.txlpitranscntr += + dwceqos_read(lp, DWC_MMC_TXLPITRANSCNTR); + if (tx_mask & BIT(26)) + lp->mmc_counters.txpiuscntr += + dwceqos_read(lp, DWC_MMC_TXLPIUSCNTR); + if (tx_mask & BIT(25)) + lp->mmc_counters.txoversize_g += + dwceqos_read(lp, DWC_MMC_TXOVERSIZE_G); + if (tx_mask & BIT(24)) + lp->mmc_counters.txvlanpackets_g += + dwceqos_read(lp, DWC_MMC_TXVLANPACKETS_G); + if (tx_mask & BIT(23)) + lp->mmc_counters.txpausepackets += + dwceqos_read(lp, DWC_MMC_TXPAUSEPACKETS); + if (tx_mask & BIT(22)) + lp->mmc_counters.txexcessdef += + dwceqos_read(lp, DWC_MMC_TXEXCESSDEF); + if (tx_mask & BIT(21)) + lp->mmc_counters.txpacketcount_g += + dwceqos_read(lp, DWC_MMC_TXPACKETCOUNT_G); + if (tx_mask & BIT(20)) + lp->mmc_counters.txoctetcount_g += + dwceqos_read(lp, DWC_MMC_TXOCTETCOUNT_G); + if (tx_mask & BIT(19)) + lp->mmc_counters.txcarriererror += + dwceqos_read(lp, DWC_MMC_TXCARRIERERROR); + if (tx_mask & BIT(18)) + lp->mmc_counters.txexcesscol += + dwceqos_read(lp, DWC_MMC_TXEXCESSCOL); + if (tx_mask & BIT(17)) + lp->mmc_counters.txlatecol += + dwceqos_read(lp, DWC_MMC_TXLATECOL); + if (tx_mask & BIT(16)) + lp->mmc_counters.txdeferred += + dwceqos_read(lp, DWC_MMC_TXDEFERRED); + if (tx_mask & BIT(15)) + lp->mmc_counters.txmulticol_g += + dwceqos_read(lp, DWC_MMC_TXMULTICOL_G); + if (tx_mask & BIT(14)) + lp->mmc_counters.txsinglecol_g += + dwceqos_read(lp, DWC_MMC_TXSINGLECOL_G); + if (tx_mask & BIT(13)) + lp->mmc_counters.txunderflowerror += + dwceqos_read(lp, DWC_MMC_TXUNDERFLOWERROR); + if (tx_mask & BIT(12)) + lp->mmc_counters.txbroadcastpackets_gb += + dwceqos_read(lp, DWC_MMC_TXBROADCASTPACKETS_GB); + if (tx_mask & BIT(11)) + lp->mmc_counters.txmulticastpackets_gb += + dwceqos_read(lp, DWC_MMC_TXMULTICASTPACKETS_GB); + if (tx_mask & BIT(10)) + lp->mmc_counters.txunicastpackets_gb += + dwceqos_read(lp, DWC_MMC_TXUNICASTPACKETS_GB); + if (tx_mask & BIT(9)) + lp->mmc_counters.tx1024tomaxoctets_gb += + dwceqos_read(lp, DWC_MMC_TX1024TOMAXOCTETS_GB); + if (tx_mask & BIT(8)) + lp->mmc_counters.tx512to1023octets_gb += + dwceqos_read(lp, DWC_MMC_TX512TO1023OCTETS_GB); + if (tx_mask & BIT(7)) + lp->mmc_counters.tx256to511octets_gb += + dwceqos_read(lp, DWC_MMC_TX256TO511OCTETS_GB); + if (tx_mask & BIT(6)) + lp->mmc_counters.tx128to255octets_gb += + dwceqos_read(lp, DWC_MMC_TX128TO255OCTETS_GB); + if (tx_mask & BIT(5)) + lp->mmc_counters.tx65to127octets_gb += + dwceqos_read(lp, DWC_MMC_TX65TO127OCTETS_GB); + if (tx_mask & BIT(4)) + lp->mmc_counters.tx64octets_gb += + dwceqos_read(lp, DWC_MMC_TX64OCTETS_GB); + if (tx_mask & BIT(3)) + lp->mmc_counters.txmulticastpackets_g += + dwceqos_read(lp, DWC_MMC_TXMULTICASTPACKETS_G); + if (tx_mask & BIT(2)) + lp->mmc_counters.txbroadcastpackets_g += + dwceqos_read(lp, DWC_MMC_TXBROADCASTPACKETS_G); + if (tx_mask & BIT(1)) + lp->mmc_counters.txpacketcount_gb += + dwceqos_read(lp, DWC_MMC_TXPACKETCOUNT_GB); + if (tx_mask & BIT(0)) + lp->mmc_counters.txoctetcount_gb += + dwceqos_read(lp, DWC_MMC_TXOCTETCOUNT_GB); + + if (rx_mask & BIT(27)) + lp->mmc_counters.rxlpitranscntr += + dwceqos_read(lp, DWC_MMC_RXLPITRANSCNTR); + if (rx_mask & BIT(26)) + lp->mmc_counters.rxlpiuscntr += + dwceqos_read(lp, DWC_MMC_RXLPIUSCNTR); + if (rx_mask & BIT(25)) + lp->mmc_counters.rxctrlpackets_g += + dwceqos_read(lp, DWC_MMC_RXCTRLPACKETS_G); + if (rx_mask & BIT(24)) + lp->mmc_counters.rxrcverror += + dwceqos_read(lp, DWC_MMC_RXRCVERROR); + if (rx_mask & BIT(23)) + lp->mmc_counters.rxwatchdog += + dwceqos_read(lp, DWC_MMC_RXWATCHDOG); + if (rx_mask & BIT(22)) + lp->mmc_counters.rxvlanpackets_gb += + dwceqos_read(lp, DWC_MMC_RXVLANPACKETS_GB); + if (rx_mask & BIT(21)) + lp->mmc_counters.rxfifooverflow += + dwceqos_read(lp, DWC_MMC_RXFIFOOVERFLOW); + if (rx_mask & BIT(20)) + lp->mmc_counters.rxpausepackets += + dwceqos_read(lp, DWC_MMC_RXPAUSEPACKETS); + if (rx_mask & BIT(19)) + lp->mmc_counters.rxoutofrangetype += + dwceqos_read(lp, DWC_MMC_RXOUTOFRANGETYPE); + if (rx_mask & BIT(18)) + lp->mmc_counters.rxlengtherror += + dwceqos_read(lp, DWC_MMC_RXLENGTHERROR); + if (rx_mask & BIT(17)) + lp->mmc_counters.rxunicastpackets_g += + dwceqos_read(lp, DWC_MMC_RXUNICASTPACKETS_G); + if (rx_mask & BIT(16)) + lp->mmc_counters.rx1024tomaxoctets_gb += + dwceqos_read(lp, DWC_MMC_RX1024TOMAXOCTETS_GB); + if (rx_mask & BIT(15)) + lp->mmc_counters.rx512to1023octets_gb += + dwceqos_read(lp, DWC_MMC_RX512TO1023OCTETS_GB); + if (rx_mask & BIT(14)) + lp->mmc_counters.rx256to511octets_gb += + dwceqos_read(lp, DWC_MMC_RX256TO511OCTETS_GB); + if (rx_mask & BIT(13)) + lp->mmc_counters.rx128to255octets_gb += + dwceqos_read(lp, DWC_MMC_RX128TO255OCTETS_GB); + if (rx_mask & BIT(12)) + lp->mmc_counters.rx65to127octets_gb += + dwceqos_read(lp, DWC_MMC_RX65TO127OCTETS_GB); + if (rx_mask & BIT(11)) + lp->mmc_counters.rx64octets_gb += + dwceqos_read(lp, DWC_MMC_RX64OCTETS_GB); + if (rx_mask & BIT(10)) + lp->mmc_counters.rxoversize_g += + dwceqos_read(lp, DWC_MMC_RXOVERSIZE_G); + if (rx_mask & BIT(9)) + lp->mmc_counters.rxundersize_g += + dwceqos_read(lp, DWC_MMC_RXUNDERSIZE_G); + if (rx_mask & BIT(8)) + lp->mmc_counters.rxjabbererror += + dwceqos_read(lp, DWC_MMC_RXJABBERERROR); + if (rx_mask & BIT(7)) + lp->mmc_counters.rxrunterror += + dwceqos_read(lp, DWC_MMC_RXRUNTERROR); + if (rx_mask & BIT(6)) + lp->mmc_counters.rxalignmenterror += + dwceqos_read(lp, DWC_MMC_RXALIGNMENTERROR); + if (rx_mask & BIT(5)) + lp->mmc_counters.rxcrcerror += + dwceqos_read(lp, DWC_MMC_RXCRCERROR); + if (rx_mask & BIT(4)) + lp->mmc_counters.rxmulticastpackets_g += + dwceqos_read(lp, DWC_MMC_RXMULTICASTPACKETS_G); + if (rx_mask & BIT(3)) + lp->mmc_counters.rxbroadcastpackets_g += + dwceqos_read(lp, DWC_MMC_RXBROADCASTPACKETS_G); + if (rx_mask & BIT(2)) + lp->mmc_counters.rxoctetcount_g += + dwceqos_read(lp, DWC_MMC_RXOCTETCOUNT_G); + if (rx_mask & BIT(1)) + lp->mmc_counters.rxoctetcount_gb += + dwceqos_read(lp, DWC_MMC_RXOCTETCOUNT_GB); + if (rx_mask & BIT(0)) + lp->mmc_counters.rxpacketcount_gb += + dwceqos_read(lp, DWC_MMC_RXPACKETCOUNT_GB); +} + +static struct rtnl_link_stats64* +dwceqos_get_stats64(struct net_device *ndev, struct rtnl_link_stats64 *s) +{ + unsigned long flags; + struct net_local *lp = netdev_priv(ndev); + struct dwceqos_mmc_counters *hwstats = &lp->mmc_counters; + + spin_lock_irqsave(&lp->stats_lock, flags); + dwceqos_read_mmc_counters(lp, lp->mmc_rx_counters_mask, + lp->mmc_tx_counters_mask); + spin_unlock_irqrestore(&lp->stats_lock, flags); + + s->rx_packets = hwstats->rxpacketcount_gb; + s->rx_bytes = hwstats->rxoctetcount_gb; + s->rx_errors = hwstats->rxpacketcount_gb - + hwstats->rxbroadcastpackets_g - + hwstats->rxmulticastpackets_g - + hwstats->rxunicastpackets_g; + s->multicast = hwstats->rxmulticastpackets_g; + s->rx_length_errors = hwstats->rxlengtherror; + s->rx_crc_errors = hwstats->rxcrcerror; + s->rx_fifo_errors = hwstats->rxfifooverflow; + + s->tx_packets = hwstats->txpacketcount_gb; + s->tx_bytes = hwstats->txoctetcount_gb; + + if (lp->mmc_tx_counters_mask & BIT(21)) + s->tx_errors = hwstats->txpacketcount_gb - + hwstats->txpacketcount_g; + else + s->tx_errors = hwstats->txunderflowerror + + hwstats->txcarriererror; + + return s; +} + +static int +dwceqos_get_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) +{ + struct net_local *lp = netdev_priv(ndev); + struct phy_device *phydev = lp->phy_dev; + + if (!phydev) + return -ENODEV; + + return phy_ethtool_gset(phydev, ecmd); +} + +static int +dwceqos_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) +{ + struct net_local *lp = netdev_priv(ndev); + struct phy_device *phydev = lp->phy_dev; + + if (!phydev) + return -ENODEV; + + return phy_ethtool_sset(phydev, ecmd); +} + +static void +dwceqos_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *ed) +{ + const struct net_local *lp = netdev_priv(ndev); + + strcpy(ed->driver, lp->pdev->dev.driver->name); + strcpy(ed->version, DRIVER_VERSION); +} + +static void dwceqos_get_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pp) +{ + const struct net_local *lp = netdev_priv(ndev); + + pp->autoneg = lp->flowcontrol.autoneg; + pp->tx_pause = lp->flowcontrol.tx; + pp->rx_pause = lp->flowcontrol.rx; +} + +static int dwceqos_set_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pp) +{ + struct net_local *lp = netdev_priv(ndev); + int ret = 0; + + lp->flowcontrol.autoneg = pp->autoneg; + if (pp->autoneg) { + lp->phy_dev->advertising |= ADVERTISED_Pause; + lp->phy_dev->advertising |= ADVERTISED_Asym_Pause; + } else { + lp->phy_dev->advertising &= ~ADVERTISED_Pause; + lp->phy_dev->advertising &= ~ADVERTISED_Asym_Pause; + lp->flowcontrol.rx = pp->rx_pause; + lp->flowcontrol.tx = pp->tx_pause; + } + + if (netif_running(ndev)) + ret = phy_start_aneg(lp->phy_dev); + + return ret; +} + +static void dwceqos_get_strings(struct net_device *ndev, u32 stringset, + u8 *data) +{ + size_t i; + + if (stringset != ETH_SS_STATS) + return; + + for (i = 0; i < ARRAY_SIZE(dwceqos_ethtool_stats); ++i) { + memcpy(data, dwceqos_ethtool_stats[i].stat_name, + ETH_GSTRING_LEN); + data += ETH_GSTRING_LEN; + } +} + +static void dwceqos_get_ethtool_stats(struct net_device *ndev, + struct ethtool_stats *stats, u64 *data) +{ + struct net_local *lp = netdev_priv(ndev); + unsigned long flags; + size_t i; + u8 *mmcstat = (u8 *)&lp->mmc_counters; + + spin_lock_irqsave(&lp->stats_lock, flags); + dwceqos_read_mmc_counters(lp, lp->mmc_rx_counters_mask, + lp->mmc_tx_counters_mask); + spin_unlock_irqrestore(&lp->stats_lock, flags); + + for (i = 0; i < ARRAY_SIZE(dwceqos_ethtool_stats); ++i) { + memcpy(data, + mmcstat + dwceqos_ethtool_stats[i].offset, + sizeof(u64)); + data++; + } +} + +static int dwceqos_get_sset_count(struct net_device *ndev, int sset) +{ + if (sset == ETH_SS_STATS) + return ARRAY_SIZE(dwceqos_ethtool_stats); + + return -EOPNOTSUPP; +} + +static void dwceqos_get_regs(struct net_device *dev, struct ethtool_regs *regs, + void *space) +{ + const struct net_local *lp = netdev_priv(dev); + u32 *reg_space = (u32 *)space; + int reg_offset; + int reg_ix = 0; + + /* MAC registers */ + for (reg_offset = START_MAC_REG_OFFSET; + reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) { + reg_space[reg_ix] = dwceqos_read(lp, reg_offset); + reg_ix++; + } + /* MTL registers */ + for (reg_offset = START_MTL_REG_OFFSET; + reg_offset <= MAX_MTL_REG_OFFSET; reg_offset += 4) { + reg_space[reg_ix] = dwceqos_read(lp, reg_offset); + reg_ix++; + } + + /* DMA registers */ + for (reg_offset = START_DMA_REG_OFFSET; + reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) { + reg_space[reg_ix] = dwceqos_read(lp, reg_offset); + reg_ix++; + } + + BUG_ON(4 * reg_ix > REG_SPACE_SIZE); +} + +static int dwceqos_get_regs_len(struct net_device *dev) +{ + return REG_SPACE_SIZE; +} + +static inline const char *dwceqos_get_rx_lpi_state(u32 lpi_ctrl) +{ + return (lpi_ctrl & DWCEQOS_MAC_LPI_CTRL_STATUS_RLPIST) ? "on" : "off"; +} + +static inline const char *dwceqos_get_tx_lpi_state(u32 lpi_ctrl) +{ + return (lpi_ctrl & DWCEQOS_MAC_LPI_CTRL_STATUS_TLPIST) ? "on" : "off"; +} + +static int dwceqos_get_eee(struct net_device *ndev, struct ethtool_eee *edata) +{ + struct net_local *lp = netdev_priv(ndev); + u32 lpi_status; + u32 lpi_enabled; + + if (!(lp->feature0 & DWCEQOS_MAC_HW_FEATURE0_EEESEL)) + return -EOPNOTSUPP; + + edata->eee_active = lp->eee_active; + edata->eee_enabled = lp->eee_enabled; + edata->tx_lpi_timer = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_ENTRY_TIMER); + lpi_status = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + lpi_enabled = !!(lpi_status & DWCEQOS_MAC_LPI_CTRL_STATUS_LIPTXA); + edata->tx_lpi_enabled = lpi_enabled; + + if (netif_msg_hw(lp)) { + u32 regval; + + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + + netdev_info(lp->ndev, "MAC LPI State: RX:%s TX:%s\n", + dwceqos_get_rx_lpi_state(regval), + dwceqos_get_tx_lpi_state(regval)); + } + + return phy_ethtool_get_eee(lp->phy_dev, edata); +} + +static int dwceqos_set_eee(struct net_device *ndev, struct ethtool_eee *edata) +{ + struct net_local *lp = netdev_priv(ndev); + u32 regval; + unsigned long flags; + + if (!(lp->feature0 & DWCEQOS_MAC_HW_FEATURE0_EEESEL)) + return -EOPNOTSUPP; + + if (edata->eee_enabled && !lp->eee_active) + return -EOPNOTSUPP; + + if (edata->tx_lpi_enabled) { + if (edata->tx_lpi_timer < DWCEQOS_LPI_TIMER_MIN || + edata->tx_lpi_timer > DWCEQOS_LPI_TIMER_MAX) + return -EINVAL; + } + + lp->eee_enabled = edata->eee_enabled; + + if (edata->eee_enabled && edata->tx_lpi_enabled) { + dwceqos_write(lp, REG_DWCEQOS_MAC_LPI_ENTRY_TIMER, + edata->tx_lpi_timer); + + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + regval |= DWCEQOS_LPI_CTRL_ENABLE_EEE; + if (lp->en_tx_lpi_clockgating) + regval |= DWCEQOS_MAC_LPI_CTRL_STATUS_LPITCSE; + dwceqos_write(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); + } else { + spin_lock_irqsave(&lp->hw_lock, flags); + regval = dwceqos_read(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS); + regval &= ~DWCEQOS_LPI_CTRL_ENABLE_EEE; + dwceqos_write(lp, REG_DWCEQOS_MAC_LPI_CTRL_STATUS, regval); + spin_unlock_irqrestore(&lp->hw_lock, flags); + } + + return phy_ethtool_set_eee(lp->phy_dev, edata); +} + +static u32 dwceqos_get_msglevel(struct net_device *ndev) +{ + const struct net_local *lp = netdev_priv(ndev); + + return lp->msg_enable; +} + +static void dwceqos_set_msglevel(struct net_device *ndev, u32 msglevel) +{ + struct net_local *lp = netdev_priv(ndev); + + lp->msg_enable = msglevel; +} + +static struct ethtool_ops dwceqos_ethtool_ops = { + .get_settings = dwceqos_get_settings, + .set_settings = dwceqos_set_settings, + .get_drvinfo = dwceqos_get_drvinfo, + .get_link = ethtool_op_get_link, + .get_pauseparam = dwceqos_get_pauseparam, + .set_pauseparam = dwceqos_set_pauseparam, + .get_strings = dwceqos_get_strings, + .get_ethtool_stats = dwceqos_get_ethtool_stats, + .get_sset_count = dwceqos_get_sset_count, + .get_regs = dwceqos_get_regs, + .get_regs_len = dwceqos_get_regs_len, + .get_eee = dwceqos_get_eee, + .set_eee = dwceqos_set_eee, + .get_msglevel = dwceqos_get_msglevel, + .set_msglevel = dwceqos_set_msglevel, +}; + +static struct net_device_ops netdev_ops = { + .ndo_open = dwceqos_open, + .ndo_stop = dwceqos_stop, + .ndo_start_xmit = dwceqos_start_xmit, + .ndo_set_rx_mode = dwceqos_set_rx_mode, + .ndo_set_mac_address = dwceqos_set_mac_address, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = dwceqos_poll_controller, +#endif + .ndo_do_ioctl = dwceqos_ioctl, + .ndo_tx_timeout = dwceqos_tx_timeout, + .ndo_get_stats64 = dwceqos_get_stats64, +}; + +static const struct of_device_id dwceq_of_match[] = { + { .compatible = "snps,dwc-qos-ethernet-4.10", }, + {} +}; +MODULE_DEVICE_TABLE(of, dwceq_of_match); + +static int dwceqos_probe(struct platform_device *pdev) +{ + struct resource *r_mem = NULL; + struct net_device *ndev; + struct net_local *lp; + int ret = -ENXIO; + + r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r_mem) { + dev_err(&pdev->dev, "no IO resource defined.\n"); + return -ENXIO; + } + + ndev = alloc_etherdev(sizeof(*lp)); + if (!ndev) { + dev_err(&pdev->dev, "etherdev allocation failed.\n"); + return -ENOMEM; + } + + SET_NETDEV_DEV(ndev, &pdev->dev); + + lp = netdev_priv(ndev); + lp->ndev = ndev; + lp->pdev = pdev; + lp->msg_enable = netif_msg_init(debug, DWCEQOS_MSG_DEFAULT); + + spin_lock_init(&lp->tx_lock); + spin_lock_init(&lp->hw_lock); + spin_lock_init(&lp->stats_lock); + + lp->apb_pclk = devm_clk_get(&pdev->dev, "apb_pclk"); + if (IS_ERR(lp->apb_pclk)) { + dev_err(&pdev->dev, "apb_pclk clock not found.\n"); + ret = PTR_ERR(lp->apb_pclk); + goto err_out_free_netdev; + } + + ret = clk_prepare_enable(lp->apb_pclk); + if (ret) { + dev_err(&pdev->dev, "Unable to enable APER clock.\n"); + goto err_out_free_netdev; + } + + lp->baseaddr = devm_ioremap_resource(&pdev->dev, r_mem); + if (IS_ERR(lp->baseaddr)) { + dev_err(&pdev->dev, "failed to map baseaddress.\n"); + ret = PTR_ERR(lp->baseaddr); + goto err_out_clk_dis_aper; + } + + ndev->irq = platform_get_irq(pdev, 0); + ndev->watchdog_timeo = DWCEQOS_TX_TIMEOUT * HZ; + ndev->netdev_ops = &netdev_ops; + ndev->ethtool_ops = &dwceqos_ethtool_ops; + ndev->base_addr = r_mem->start; + + dwceqos_get_hwfeatures(lp); + dwceqos_mdio_set_csr(lp); + + ndev->hw_features = NETIF_F_SG; + + if (lp->feature1 & DWCEQOS_MAC_HW_FEATURE1_TSOEN) + ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; + + if (lp->feature0 & DWCEQOS_MAC_HW_FEATURE0_TXCOESEL) + ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + + if (lp->feature0 & DWCEQOS_MAC_HW_FEATURE0_RXCOESEL) + ndev->hw_features |= NETIF_F_RXCSUM; + + ndev->features = ndev->hw_features; + + netif_napi_add(ndev, &lp->napi, dwceqos_rx_poll, NAPI_POLL_WEIGHT); + + ret = register_netdev(ndev); + if (ret) { + dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); + goto err_out_clk_dis_aper; + } + + lp->phy_ref_clk = devm_clk_get(&pdev->dev, "phy_ref_clk"); + if (IS_ERR(lp->phy_ref_clk)) { + dev_err(&pdev->dev, "phy_ref_clk clock not found.\n"); + ret = PTR_ERR(lp->phy_ref_clk); + goto err_out_unregister_netdev; + } + + ret = clk_prepare_enable(lp->phy_ref_clk); + if (ret) { + dev_err(&pdev->dev, "Unable to enable device clock.\n"); + goto err_out_unregister_netdev; + } + + lp->phy_node = of_parse_phandle(lp->pdev->dev.of_node, + "phy-handle", 0); + if (!lp->phy_node && of_phy_is_fixed_link(lp->pdev->dev.of_node)) { + ret = of_phy_register_fixed_link(lp->pdev->dev.of_node); + if (ret < 0) { + dev_err(&pdev->dev, "invalid fixed-link"); + goto err_out_unregister_netdev; + } + + lp->phy_node = of_node_get(lp->pdev->dev.of_node); + } + + ret = of_get_phy_mode(lp->pdev->dev.of_node); + if (ret < 0) { + dev_err(&lp->pdev->dev, "error in getting phy i/f\n"); + goto err_out_unregister_clk_notifier; + } + + lp->phy_interface = ret; + + ret = dwceqos_mii_init(lp); + if (ret) { + dev_err(&lp->pdev->dev, "error in dwceqos_mii_init\n"); + goto err_out_unregister_clk_notifier; + } + + ret = dwceqos_mii_probe(ndev); + if (ret != 0) { + netdev_err(ndev, "mii_probe fail.\n"); + ret = -ENXIO; + goto err_out_unregister_clk_notifier; + } + + dwceqos_set_umac_addr(lp, lp->ndev->dev_addr, 0); + + tasklet_init(&lp->tx_bdreclaim_tasklet, dwceqos_tx_reclaim, + (unsigned long)ndev); + tasklet_disable(&lp->tx_bdreclaim_tasklet); + + lp->txtimeout_handler_wq = create_singlethread_workqueue(DRIVER_NAME); + INIT_WORK(&lp->txtimeout_reinit, dwceqos_reinit_for_txtimeout); + + platform_set_drvdata(pdev, ndev); + ret = dwceqos_probe_config_dt(pdev); + if (ret) { + dev_err(&lp->pdev->dev, "Unable to retrieve DT, error %d\n", + ret); + goto err_out_unregister_clk_notifier; + } + dev_info(&lp->pdev->dev, "pdev->id %d, baseaddr 0x%08lx, irq %d\n", + pdev->id, ndev->base_addr, ndev->irq); + + ret = devm_request_irq(&pdev->dev, ndev->irq, &dwceqos_interrupt, 0, + ndev->name, ndev); + if (ret) { + dev_err(&lp->pdev->dev, "Unable to request IRQ %d, error %d\n", + ndev->irq, ret); + goto err_out_unregister_clk_notifier; + } + + if (netif_msg_probe(lp)) + netdev_dbg(ndev, "net_local@%p\n", lp); + + return 0; + +err_out_unregister_clk_notifier: + clk_disable_unprepare(lp->phy_ref_clk); +err_out_unregister_netdev: + unregister_netdev(ndev); +err_out_clk_dis_aper: + clk_disable_unprepare(lp->apb_pclk); +err_out_free_netdev: + if (lp->phy_node) + of_node_put(lp->phy_node); + free_netdev(ndev); + platform_set_drvdata(pdev, NULL); + return ret; +} + +static int dwceqos_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct net_local *lp; + + if (ndev) { + lp = netdev_priv(ndev); + + if (lp->phy_dev) + phy_disconnect(lp->phy_dev); + mdiobus_unregister(lp->mii_bus); + kfree(lp->mii_bus->irq); + mdiobus_free(lp->mii_bus); + + unregister_netdev(ndev); + + clk_disable_unprepare(lp->phy_ref_clk); + clk_disable_unprepare(lp->apb_pclk); + + free_netdev(ndev); + } + + return 0; +} + +static struct platform_driver dwceqos_driver = { + .probe = dwceqos_probe, + .remove = dwceqos_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = dwceq_of_match, + }, +}; + +module_platform_driver(dwceqos_driver); + +MODULE_DESCRIPTION("DWC Ethernet QoS v4.10a driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Andreas Irestaal <andreas.irestal@axis.com>"); +MODULE_AUTHOR("Lars Persson <lars.persson@axis.com>"); |