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Message-Id: <1438077710-19175-3-git-send-email-larper@axis.com>
Date: Tue, 28 Jul 2015 12:01:48 +0200
From: Lars Persson <lars.persson@...s.com>
To: netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: andire@...s.com, robh+dt@...nel.org, pawel.moll@....com,
mark.rutland@....com, ijc+devicetree@...lion.org.uk,
galak@...eaurora.org, Lars Persson <larper@...s.com>
Subject: [PATCH net-next 2/4] dwc_eth_qos: Add support for Synopsys DWC Ethernet QoS
This patch adds a platform driver for the new generation of the
gigabit ethernet IP from Synopsys. It is developed for version 4.10a
of the IP core.
Signed-off-by: Lars Persson <larper@...s.com>
---
drivers/net/ethernet/synopsys/Kconfig | 27 +
drivers/net/ethernet/synopsys/Makefile | 5 +
drivers/net/ethernet/synopsys/dwc_eth_qos.c | 3019 +++++++++++++++++++++++++++
3 files changed, 3051 insertions(+)
create mode 100644 drivers/net/ethernet/synopsys/Kconfig
create mode 100644 drivers/net/ethernet/synopsys/Makefile
create mode 100644 drivers/net/ethernet/synopsys/dwc_eth_qos.c
diff --git a/drivers/net/ethernet/synopsys/Kconfig b/drivers/net/ethernet/synopsys/Kconfig
new file mode 100644
index 0000000..a8f3151
--- /dev/null
+++ b/drivers/net/ethernet/synopsys/Kconfig
@@ -0,0 +1,27 @@
+#
+# Synopsys network device configuration
+#
+
+config NET_VENDOR_SYNOPSYS
+ bool "Synopsys devices"
+ default y
+ ---help---
+ If you have a network (Ethernet) device belonging to this class, say Y.
+
+ 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 Synopsys devices. If you say Y, you will be asked
+ for your specific device in the following questions.
+
+if NET_VENDOR_SYNOPSYS
+
+config SYNOPSYS_DWC_ETH_QOS
+ tristate "Sypnopsys DWC Ethernet QOS v4.10a support"
+ select PHYLIB
+ select CRC32
+ select MII
+ depends on OF
+ ---help---
+ This driver supports the DWC Ethernet QoS from Synopsys
+
+endif # NET_VENDOR_SYNOPSYS
diff --git a/drivers/net/ethernet/synopsys/Makefile b/drivers/net/ethernet/synopsys/Makefile
new file mode 100644
index 0000000..7a37572
--- /dev/null
+++ b/drivers/net/ethernet/synopsys/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Synopsys network device drivers.
+#
+
+obj-$(CONFIG_SYNOPSYS_DWC_ETH_QOS) += dwc_eth_qos.o
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 0000000..85b3326
--- /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@...s.com>");
+MODULE_AUTHOR("Lars Persson <lars.persson@...s.com>");
--
2.1.4
--
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