net: mvpp2: add hw_version field in "struct mvpp2"

[u-boot] / drivers / net / mvpp2.c

/*
 * Driver for Marvell PPv2 network controller for Armada 375 SoC.
 *
 * Copyright (C) 2014 Marvell
 *
 * Marcin Wojtas <mw@semihalf.com>
 *
 * U-Boot version:
 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <common.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <net.h>
#include <netdev.h>
#include <config.h>
#include <malloc.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <phy.h>
#include <miiphy.h>
#include <watchdog.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include <linux/compat.h>
#include <linux/mbus.h>

DECLARE_GLOBAL_DATA_PTR;

/* Some linux -> U-Boot compatibility stuff */
#define netdev_err(dev, fmt, args...)           \
        printf(fmt, ##args)
#define netdev_warn(dev, fmt, args...)          \
        printf(fmt, ##args)
#define netdev_info(dev, fmt, args...)          \
        printf(fmt, ##args)
#define netdev_dbg(dev, fmt, args...)           \
        printf(fmt, ##args)

#define ETH_ALEN        6               /* Octets in one ethernet addr  */

#define __verify_pcpu_ptr(ptr)                                          \
do {                                                                    \
        const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL;    \
        (void)__vpp_verify;                                             \
} while (0)

#define VERIFY_PERCPU_PTR(__p)                                          \
({                                                                      \
        __verify_pcpu_ptr(__p);                                         \
        (typeof(*(__p)) __kernel __force *)(__p);                       \
})

#define per_cpu_ptr(ptr, cpu)   ({ (void)(cpu); VERIFY_PERCPU_PTR(ptr); })
#define smp_processor_id()      0
#define num_present_cpus()      1
#define for_each_present_cpu(cpu)                       \
        for ((cpu) = 0; (cpu) < 1; (cpu)++)

#define NET_SKB_PAD     max(32, MVPP2_CPU_D_CACHE_LINE_SIZE)

#define CONFIG_NR_CPUS          1
#define ETH_HLEN                ETHER_HDR_SIZE  /* Total octets in header */

/* 2(HW hdr) 14(MAC hdr) 4(CRC) 32(extra for cache prefetch) */
#define WRAP                    (2 + ETH_HLEN + 4 + 32)
#define MTU                     1500
#define RX_BUFFER_SIZE          (ALIGN(MTU + WRAP, ARCH_DMA_MINALIGN))

#define MVPP2_SMI_TIMEOUT                       10000

/* RX Fifo Registers */
#define MVPP2_RX_DATA_FIFO_SIZE_REG(port)       (0x00 + 4 * (port))
#define MVPP2_RX_ATTR_FIFO_SIZE_REG(port)       (0x20 + 4 * (port))
#define MVPP2_RX_MIN_PKT_SIZE_REG               0x60
#define MVPP2_RX_FIFO_INIT_REG                  0x64

/* RX DMA Top Registers */
#define MVPP2_RX_CTRL_REG(port)                 (0x140 + 4 * (port))
#define     MVPP2_RX_LOW_LATENCY_PKT_SIZE(s)    (((s) & 0xfff) << 16)
#define     MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK   BIT(31)
#define MVPP2_POOL_BUF_SIZE_REG(pool)           (0x180 + 4 * (pool))
#define     MVPP2_POOL_BUF_SIZE_OFFSET          5
#define MVPP2_RXQ_CONFIG_REG(rxq)               (0x800 + 4 * (rxq))
#define     MVPP2_SNOOP_PKT_SIZE_MASK           0x1ff
#define     MVPP2_SNOOP_BUF_HDR_MASK            BIT(9)
#define     MVPP2_RXQ_POOL_SHORT_OFFS           20
#define     MVPP2_RXQ_POOL_SHORT_MASK           0x700000
#define     MVPP2_RXQ_POOL_LONG_OFFS            24
#define     MVPP2_RXQ_POOL_LONG_MASK            0x7000000
#define     MVPP2_RXQ_PACKET_OFFSET_OFFS        28
#define     MVPP2_RXQ_PACKET_OFFSET_MASK        0x70000000
#define     MVPP2_RXQ_DISABLE_MASK              BIT(31)

/* Parser Registers */
#define MVPP2_PRS_INIT_LOOKUP_REG               0x1000
#define     MVPP2_PRS_PORT_LU_MAX               0xf
#define     MVPP2_PRS_PORT_LU_MASK(port)        (0xff << ((port) * 4))
#define     MVPP2_PRS_PORT_LU_VAL(port, val)    ((val) << ((port) * 4))
#define MVPP2_PRS_INIT_OFFS_REG(port)           (0x1004 + ((port) & 4))
#define     MVPP2_PRS_INIT_OFF_MASK(port)       (0x3f << (((port) % 4) * 8))
#define     MVPP2_PRS_INIT_OFF_VAL(port, val)   ((val) << (((port) % 4) * 8))
#define MVPP2_PRS_MAX_LOOP_REG(port)            (0x100c + ((port) & 4))
#define     MVPP2_PRS_MAX_LOOP_MASK(port)       (0xff << (((port) % 4) * 8))
#define     MVPP2_PRS_MAX_LOOP_VAL(port, val)   ((val) << (((port) % 4) * 8))
#define MVPP2_PRS_TCAM_IDX_REG                  0x1100
#define MVPP2_PRS_TCAM_DATA_REG(idx)            (0x1104 + (idx) * 4)
#define     MVPP2_PRS_TCAM_INV_MASK             BIT(31)
#define MVPP2_PRS_SRAM_IDX_REG                  0x1200
#define MVPP2_PRS_SRAM_DATA_REG(idx)            (0x1204 + (idx) * 4)
#define MVPP2_PRS_TCAM_CTRL_REG                 0x1230
#define     MVPP2_PRS_TCAM_EN_MASK              BIT(0)

/* Classifier Registers */
#define MVPP2_CLS_MODE_REG                      0x1800
#define     MVPP2_CLS_MODE_ACTIVE_MASK          BIT(0)
#define MVPP2_CLS_PORT_WAY_REG                  0x1810
#define     MVPP2_CLS_PORT_WAY_MASK(port)       (1 << (port))
#define MVPP2_CLS_LKP_INDEX_REG                 0x1814
#define     MVPP2_CLS_LKP_INDEX_WAY_OFFS        6
#define MVPP2_CLS_LKP_TBL_REG                   0x1818
#define     MVPP2_CLS_LKP_TBL_RXQ_MASK          0xff
#define     MVPP2_CLS_LKP_TBL_LOOKUP_EN_MASK    BIT(25)
#define MVPP2_CLS_FLOW_INDEX_REG                0x1820
#define MVPP2_CLS_FLOW_TBL0_REG                 0x1824
#define MVPP2_CLS_FLOW_TBL1_REG                 0x1828
#define MVPP2_CLS_FLOW_TBL2_REG                 0x182c
#define MVPP2_CLS_OVERSIZE_RXQ_LOW_REG(port)    (0x1980 + ((port) * 4))
#define     MVPP2_CLS_OVERSIZE_RXQ_LOW_BITS     3
#define     MVPP2_CLS_OVERSIZE_RXQ_LOW_MASK     0x7
#define MVPP2_CLS_SWFWD_P2HQ_REG(port)          (0x19b0 + ((port) * 4))
#define MVPP2_CLS_SWFWD_PCTRL_REG               0x19d0
#define     MVPP2_CLS_SWFWD_PCTRL_MASK(port)    (1 << (port))

/* Descriptor Manager Top Registers */
#define MVPP2_RXQ_NUM_REG                       0x2040
#define MVPP2_RXQ_DESC_ADDR_REG                 0x2044
#define MVPP2_RXQ_DESC_SIZE_REG                 0x2048
#define     MVPP2_RXQ_DESC_SIZE_MASK            0x3ff0
#define MVPP2_RXQ_STATUS_UPDATE_REG(rxq)        (0x3000 + 4 * (rxq))
#define     MVPP2_RXQ_NUM_PROCESSED_OFFSET      0
#define     MVPP2_RXQ_NUM_NEW_OFFSET            16
#define MVPP2_RXQ_STATUS_REG(rxq)               (0x3400 + 4 * (rxq))
#define     MVPP2_RXQ_OCCUPIED_MASK             0x3fff
#define     MVPP2_RXQ_NON_OCCUPIED_OFFSET       16
#define     MVPP2_RXQ_NON_OCCUPIED_MASK         0x3fff0000
#define MVPP2_RXQ_THRESH_REG                    0x204c
#define     MVPP2_OCCUPIED_THRESH_OFFSET        0
#define     MVPP2_OCCUPIED_THRESH_MASK          0x3fff
#define MVPP2_RXQ_INDEX_REG                     0x2050
#define MVPP2_TXQ_NUM_REG                       0x2080
#define MVPP2_TXQ_DESC_ADDR_REG                 0x2084
#define MVPP2_TXQ_DESC_SIZE_REG                 0x2088
#define     MVPP2_TXQ_DESC_SIZE_MASK            0x3ff0
#define MVPP2_AGGR_TXQ_UPDATE_REG               0x2090
#define MVPP2_TXQ_THRESH_REG                    0x2094
#define     MVPP2_TRANSMITTED_THRESH_OFFSET     16
#define     MVPP2_TRANSMITTED_THRESH_MASK       0x3fff0000
#define MVPP2_TXQ_INDEX_REG                     0x2098
#define MVPP2_TXQ_PREF_BUF_REG                  0x209c
#define     MVPP2_PREF_BUF_PTR(desc)            ((desc) & 0xfff)
#define     MVPP2_PREF_BUF_SIZE_4               (BIT(12) | BIT(13))
#define     MVPP2_PREF_BUF_SIZE_16              (BIT(12) | BIT(14))
#define     MVPP2_PREF_BUF_THRESH(val)          ((val) << 17)
#define     MVPP2_TXQ_DRAIN_EN_MASK             BIT(31)
#define MVPP2_TXQ_PENDING_REG                   0x20a0
#define     MVPP2_TXQ_PENDING_MASK              0x3fff
#define MVPP2_TXQ_INT_STATUS_REG                0x20a4
#define MVPP2_TXQ_SENT_REG(txq)                 (0x3c00 + 4 * (txq))
#define     MVPP2_TRANSMITTED_COUNT_OFFSET      16
#define     MVPP2_TRANSMITTED_COUNT_MASK        0x3fff0000
#define MVPP2_TXQ_RSVD_REQ_REG                  0x20b0
#define     MVPP2_TXQ_RSVD_REQ_Q_OFFSET         16
#define MVPP2_TXQ_RSVD_RSLT_REG                 0x20b4
#define     MVPP2_TXQ_RSVD_RSLT_MASK            0x3fff
#define MVPP2_TXQ_RSVD_CLR_REG                  0x20b8
#define     MVPP2_TXQ_RSVD_CLR_OFFSET           16
#define MVPP2_AGGR_TXQ_DESC_ADDR_REG(cpu)       (0x2100 + 4 * (cpu))
#define MVPP2_AGGR_TXQ_DESC_SIZE_REG(cpu)       (0x2140 + 4 * (cpu))
#define     MVPP2_AGGR_TXQ_DESC_SIZE_MASK       0x3ff0
#define MVPP2_AGGR_TXQ_STATUS_REG(cpu)          (0x2180 + 4 * (cpu))
#define     MVPP2_AGGR_TXQ_PENDING_MASK         0x3fff
#define MVPP2_AGGR_TXQ_INDEX_REG(cpu)           (0x21c0 + 4 * (cpu))

/* MBUS bridge registers */
#define MVPP2_WIN_BASE(w)                       (0x4000 + ((w) << 2))
#define MVPP2_WIN_SIZE(w)                       (0x4020 + ((w) << 2))
#define MVPP2_WIN_REMAP(w)                      (0x4040 + ((w) << 2))
#define MVPP2_BASE_ADDR_ENABLE                  0x4060

/* Interrupt Cause and Mask registers */
#define MVPP2_ISR_RX_THRESHOLD_REG(rxq)         (0x5200 + 4 * (rxq))
#define MVPP2_ISR_RXQ_GROUP_REG(rxq)            (0x5400 + 4 * (rxq))
#define MVPP2_ISR_ENABLE_REG(port)              (0x5420 + 4 * (port))
#define     MVPP2_ISR_ENABLE_INTERRUPT(mask)    ((mask) & 0xffff)
#define     MVPP2_ISR_DISABLE_INTERRUPT(mask)   (((mask) << 16) & 0xffff0000)
#define MVPP2_ISR_RX_TX_CAUSE_REG(port)         (0x5480 + 4 * (port))
#define     MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK 0xffff
#define     MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK 0xff0000
#define     MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK    BIT(24)
#define     MVPP2_CAUSE_FCS_ERR_MASK            BIT(25)
#define     MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK   BIT(26)
#define     MVPP2_CAUSE_TX_EXCEPTION_SUM_MASK   BIT(29)
#define     MVPP2_CAUSE_RX_EXCEPTION_SUM_MASK   BIT(30)
#define     MVPP2_CAUSE_MISC_SUM_MASK           BIT(31)
#define MVPP2_ISR_RX_TX_MASK_REG(port)          (0x54a0 + 4 * (port))
#define MVPP2_ISR_PON_RX_TX_MASK_REG            0x54bc
#define     MVPP2_PON_CAUSE_RXQ_OCCUP_DESC_ALL_MASK     0xffff
#define     MVPP2_PON_CAUSE_TXP_OCCUP_DESC_ALL_MASK     0x3fc00000
#define     MVPP2_PON_CAUSE_MISC_SUM_MASK               BIT(31)
#define MVPP2_ISR_MISC_CAUSE_REG                0x55b0

/* Buffer Manager registers */
#define MVPP2_BM_POOL_BASE_REG(pool)            (0x6000 + ((pool) * 4))
#define     MVPP2_BM_POOL_BASE_ADDR_MASK        0xfffff80
#define MVPP2_BM_POOL_SIZE_REG(pool)            (0x6040 + ((pool) * 4))
#define     MVPP2_BM_POOL_SIZE_MASK             0xfff0
#define MVPP2_BM_POOL_READ_PTR_REG(pool)        (0x6080 + ((pool) * 4))
#define     MVPP2_BM_POOL_GET_READ_PTR_MASK     0xfff0
#define MVPP2_BM_POOL_PTRS_NUM_REG(pool)        (0x60c0 + ((pool) * 4))
#define     MVPP2_BM_POOL_PTRS_NUM_MASK         0xfff0
#define MVPP2_BM_BPPI_READ_PTR_REG(pool)        (0x6100 + ((pool) * 4))
#define MVPP2_BM_BPPI_PTRS_NUM_REG(pool)        (0x6140 + ((pool) * 4))
#define     MVPP2_BM_BPPI_PTR_NUM_MASK          0x7ff
#define     MVPP2_BM_BPPI_PREFETCH_FULL_MASK    BIT(16)
#define MVPP2_BM_POOL_CTRL_REG(pool)            (0x6200 + ((pool) * 4))
#define     MVPP2_BM_START_MASK                 BIT(0)
#define     MVPP2_BM_STOP_MASK                  BIT(1)
#define     MVPP2_BM_STATE_MASK                 BIT(4)
#define     MVPP2_BM_LOW_THRESH_OFFS            8
#define     MVPP2_BM_LOW_THRESH_MASK            0x7f00
#define     MVPP2_BM_LOW_THRESH_VALUE(val)      ((val) << \
                                                MVPP2_BM_LOW_THRESH_OFFS)
#define     MVPP2_BM_HIGH_THRESH_OFFS           16
#define     MVPP2_BM_HIGH_THRESH_MASK           0x7f0000
#define     MVPP2_BM_HIGH_THRESH_VALUE(val)     ((val) << \
                                                MVPP2_BM_HIGH_THRESH_OFFS)
#define MVPP2_BM_INTR_CAUSE_REG(pool)           (0x6240 + ((pool) * 4))
#define     MVPP2_BM_RELEASED_DELAY_MASK        BIT(0)
#define     MVPP2_BM_ALLOC_FAILED_MASK          BIT(1)
#define     MVPP2_BM_BPPE_EMPTY_MASK            BIT(2)
#define     MVPP2_BM_BPPE_FULL_MASK             BIT(3)
#define     MVPP2_BM_AVAILABLE_BP_LOW_MASK      BIT(4)
#define MVPP2_BM_INTR_MASK_REG(pool)            (0x6280 + ((pool) * 4))
#define MVPP2_BM_PHY_ALLOC_REG(pool)            (0x6400 + ((pool) * 4))
#define     MVPP2_BM_PHY_ALLOC_GRNTD_MASK       BIT(0)
#define MVPP2_BM_VIRT_ALLOC_REG                 0x6440
#define MVPP2_BM_PHY_RLS_REG(pool)              (0x6480 + ((pool) * 4))
#define     MVPP2_BM_PHY_RLS_MC_BUFF_MASK       BIT(0)
#define     MVPP2_BM_PHY_RLS_PRIO_EN_MASK       BIT(1)
#define     MVPP2_BM_PHY_RLS_GRNTD_MASK         BIT(2)
#define MVPP2_BM_VIRT_RLS_REG                   0x64c0
#define MVPP2_BM_MC_RLS_REG                     0x64c4
#define     MVPP2_BM_MC_ID_MASK                 0xfff
#define     MVPP2_BM_FORCE_RELEASE_MASK         BIT(12)

/* TX Scheduler registers */
#define MVPP2_TXP_SCHED_PORT_INDEX_REG          0x8000
#define MVPP2_TXP_SCHED_Q_CMD_REG               0x8004
#define     MVPP2_TXP_SCHED_ENQ_MASK            0xff
#define     MVPP2_TXP_SCHED_DISQ_OFFSET         8
#define MVPP2_TXP_SCHED_CMD_1_REG               0x8010
#define MVPP2_TXP_SCHED_PERIOD_REG              0x8018
#define MVPP2_TXP_SCHED_MTU_REG                 0x801c
#define     MVPP2_TXP_MTU_MAX                   0x7FFFF
#define MVPP2_TXP_SCHED_REFILL_REG              0x8020
#define     MVPP2_TXP_REFILL_TOKENS_ALL_MASK    0x7ffff
#define     MVPP2_TXP_REFILL_PERIOD_ALL_MASK    0x3ff00000
#define     MVPP2_TXP_REFILL_PERIOD_MASK(v)     ((v) << 20)
#define MVPP2_TXP_SCHED_TOKEN_SIZE_REG          0x8024
#define     MVPP2_TXP_TOKEN_SIZE_MAX            0xffffffff
#define MVPP2_TXQ_SCHED_REFILL_REG(q)           (0x8040 + ((q) << 2))
#define     MVPP2_TXQ_REFILL_TOKENS_ALL_MASK    0x7ffff
#define     MVPP2_TXQ_REFILL_PERIOD_ALL_MASK    0x3ff00000
#define     MVPP2_TXQ_REFILL_PERIOD_MASK(v)     ((v) << 20)
#define MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(q)       (0x8060 + ((q) << 2))
#define     MVPP2_TXQ_TOKEN_SIZE_MAX            0x7fffffff
#define MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(q)       (0x8080 + ((q) << 2))
#define     MVPP2_TXQ_TOKEN_CNTR_MAX            0xffffffff

/* TX general registers */
#define MVPP2_TX_SNOOP_REG                      0x8800
#define MVPP2_TX_PORT_FLUSH_REG                 0x8810
#define     MVPP2_TX_PORT_FLUSH_MASK(port)      (1 << (port))

/* LMS registers */
#define MVPP2_SRC_ADDR_MIDDLE                   0x24
#define MVPP2_SRC_ADDR_HIGH                     0x28
#define MVPP2_PHY_AN_CFG0_REG                   0x34
#define     MVPP2_PHY_AN_STOP_SMI0_MASK         BIT(7)
#define MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG      0x305c
#define     MVPP2_EXT_GLOBAL_CTRL_DEFAULT       0x27

/* Per-port registers */
#define MVPP2_GMAC_CTRL_0_REG                   0x0
#define      MVPP2_GMAC_PORT_EN_MASK            BIT(0)
#define      MVPP2_GMAC_MAX_RX_SIZE_OFFS        2
#define      MVPP2_GMAC_MAX_RX_SIZE_MASK        0x7ffc
#define      MVPP2_GMAC_MIB_CNTR_EN_MASK        BIT(15)
#define MVPP2_GMAC_CTRL_1_REG                   0x4
#define      MVPP2_GMAC_PERIODIC_XON_EN_MASK    BIT(1)
#define      MVPP2_GMAC_GMII_LB_EN_MASK         BIT(5)
#define      MVPP2_GMAC_PCS_LB_EN_BIT           6
#define      MVPP2_GMAC_PCS_LB_EN_MASK          BIT(6)
#define      MVPP2_GMAC_SA_LOW_OFFS             7
#define MVPP2_GMAC_CTRL_2_REG                   0x8
#define      MVPP2_GMAC_INBAND_AN_MASK          BIT(0)
#define      MVPP2_GMAC_PCS_ENABLE_MASK         BIT(3)
#define      MVPP2_GMAC_PORT_RGMII_MASK         BIT(4)
#define      MVPP2_GMAC_PORT_RESET_MASK         BIT(6)
#define MVPP2_GMAC_AUTONEG_CONFIG               0xc
#define      MVPP2_GMAC_FORCE_LINK_DOWN         BIT(0)
#define      MVPP2_GMAC_FORCE_LINK_PASS         BIT(1)
#define      MVPP2_GMAC_CONFIG_MII_SPEED        BIT(5)
#define      MVPP2_GMAC_CONFIG_GMII_SPEED       BIT(6)
#define      MVPP2_GMAC_AN_SPEED_EN             BIT(7)
#define      MVPP2_GMAC_FC_ADV_EN               BIT(9)
#define      MVPP2_GMAC_CONFIG_FULL_DUPLEX      BIT(12)
#define      MVPP2_GMAC_AN_DUPLEX_EN            BIT(13)
#define MVPP2_GMAC_PORT_FIFO_CFG_1_REG          0x1c
#define      MVPP2_GMAC_TX_FIFO_MIN_TH_OFFS     6
#define      MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK 0x1fc0
#define      MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(v)  (((v) << 6) & \
                                        MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK)

#define MVPP2_CAUSE_TXQ_SENT_DESC_ALL_MASK      0xff

/* Descriptor ring Macros */
#define MVPP2_QUEUE_NEXT_DESC(q, index) \
        (((index) < (q)->last_desc) ? ((index) + 1) : 0)

/* SMI: 0xc0054 -> offset 0x54 to lms_base */
#define MVPP2_SMI                               0x0054
#define     MVPP2_PHY_REG_MASK                  0x1f
/* SMI register fields */
#define     MVPP2_SMI_DATA_OFFS                 0       /* Data */
#define     MVPP2_SMI_DATA_MASK                 (0xffff << MVPP2_SMI_DATA_OFFS)
#define     MVPP2_SMI_DEV_ADDR_OFFS             16      /* PHY device address */
#define     MVPP2_SMI_REG_ADDR_OFFS             21      /* PHY device reg addr*/
#define     MVPP2_SMI_OPCODE_OFFS               26      /* Write/Read opcode */
#define     MVPP2_SMI_OPCODE_READ               (1 << MVPP2_SMI_OPCODE_OFFS)
#define     MVPP2_SMI_READ_VALID                (1 << 27)       /* Read Valid */
#define     MVPP2_SMI_BUSY                      (1 << 28)       /* Busy */

#define     MVPP2_PHY_ADDR_MASK                 0x1f
#define     MVPP2_PHY_REG_MASK                  0x1f

/* Various constants */

/* Coalescing */
#define MVPP2_TXDONE_COAL_PKTS_THRESH   15
#define MVPP2_TXDONE_HRTIMER_PERIOD_NS  1000000UL
#define MVPP2_RX_COAL_PKTS              32
#define MVPP2_RX_COAL_USEC              100

/* The two bytes Marvell header. Either contains a special value used
 * by Marvell switches when a specific hardware mode is enabled (not
 * supported by this driver) or is filled automatically by zeroes on
 * the RX side. Those two bytes being at the front of the Ethernet
 * header, they allow to have the IP header aligned on a 4 bytes
 * boundary automatically: the hardware skips those two bytes on its
 * own.
 */
#define MVPP2_MH_SIZE                   2
#define MVPP2_ETH_TYPE_LEN              2
#define MVPP2_PPPOE_HDR_SIZE            8
#define MVPP2_VLAN_TAG_LEN              4

/* Lbtd 802.3 type */
#define MVPP2_IP_LBDT_TYPE              0xfffa

#define MVPP2_CPU_D_CACHE_LINE_SIZE     32
#define MVPP2_TX_CSUM_MAX_SIZE          9800

/* Timeout constants */
#define MVPP2_TX_DISABLE_TIMEOUT_MSEC   1000
#define MVPP2_TX_PENDING_TIMEOUT_MSEC   1000

#define MVPP2_TX_MTU_MAX                0x7ffff

/* Maximum number of T-CONTs of PON port */
#define MVPP2_MAX_TCONT                 16

/* Maximum number of supported ports */
#define MVPP2_MAX_PORTS                 4

/* Maximum number of TXQs used by single port */
#define MVPP2_MAX_TXQ                   8

/* Maximum number of RXQs used by single port */
#define MVPP2_MAX_RXQ                   8

/* Default number of TXQs in use */
#define MVPP2_DEFAULT_TXQ               1

/* Dfault number of RXQs in use */
#define MVPP2_DEFAULT_RXQ               1
#define CONFIG_MV_ETH_RXQ               8       /* increment by 8 */

/* Total number of RXQs available to all ports */
#define MVPP2_RXQ_TOTAL_NUM             (MVPP2_MAX_PORTS * MVPP2_MAX_RXQ)

/* Max number of Rx descriptors */
#define MVPP2_MAX_RXD                   16

/* Max number of Tx descriptors */
#define MVPP2_MAX_TXD                   16

/* Amount of Tx descriptors that can be reserved at once by CPU */
#define MVPP2_CPU_DESC_CHUNK            64

/* Max number of Tx descriptors in each aggregated queue */
#define MVPP2_AGGR_TXQ_SIZE             256

/* Descriptor aligned size */
#define MVPP2_DESC_ALIGNED_SIZE         32

/* Descriptor alignment mask */
#define MVPP2_TX_DESC_ALIGN             (MVPP2_DESC_ALIGNED_SIZE - 1)

/* RX FIFO constants */
#define MVPP2_RX_FIFO_PORT_DATA_SIZE    0x2000
#define MVPP2_RX_FIFO_PORT_ATTR_SIZE    0x80
#define MVPP2_RX_FIFO_PORT_MIN_PKT      0x80

/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
        0

#define MVPP2_RX_PKT_SIZE(mtu) \
        ALIGN((mtu) + MVPP2_MH_SIZE + MVPP2_VLAN_TAG_LEN + \
              ETH_HLEN + ETH_FCS_LEN, MVPP2_CPU_D_CACHE_LINE_SIZE)

#define MVPP2_RX_BUF_SIZE(pkt_size)     ((pkt_size) + NET_SKB_PAD)
#define MVPP2_RX_TOTAL_SIZE(buf_size)   ((buf_size) + MVPP2_SKB_SHINFO_SIZE)
#define MVPP2_RX_MAX_PKT_SIZE(total_size) \
        ((total_size) - NET_SKB_PAD - MVPP2_SKB_SHINFO_SIZE)

#define MVPP2_BIT_TO_BYTE(bit)          ((bit) / 8)

/* IPv6 max L3 address size */
#define MVPP2_MAX_L3_ADDR_SIZE          16

/* Port flags */
#define MVPP2_F_LOOPBACK                BIT(0)

/* Marvell tag types */
enum mvpp2_tag_type {
        MVPP2_TAG_TYPE_NONE = 0,
        MVPP2_TAG_TYPE_MH   = 1,
        MVPP2_TAG_TYPE_DSA  = 2,
        MVPP2_TAG_TYPE_EDSA = 3,
        MVPP2_TAG_TYPE_VLAN = 4,
        MVPP2_TAG_TYPE_LAST = 5
};

/* Parser constants */
#define MVPP2_PRS_TCAM_SRAM_SIZE        256
#define MVPP2_PRS_TCAM_WORDS            6
#define MVPP2_PRS_SRAM_WORDS            4
#define MVPP2_PRS_FLOW_ID_SIZE          64
#define MVPP2_PRS_FLOW_ID_MASK          0x3f
#define MVPP2_PRS_TCAM_ENTRY_INVALID    1
#define MVPP2_PRS_TCAM_DSA_TAGGED_BIT   BIT(5)
#define MVPP2_PRS_IPV4_HEAD             0x40
#define MVPP2_PRS_IPV4_HEAD_MASK        0xf0
#define MVPP2_PRS_IPV4_MC               0xe0
#define MVPP2_PRS_IPV4_MC_MASK          0xf0
#define MVPP2_PRS_IPV4_BC_MASK          0xff
#define MVPP2_PRS_IPV4_IHL              0x5
#define MVPP2_PRS_IPV4_IHL_MASK         0xf
#define MVPP2_PRS_IPV6_MC               0xff
#define MVPP2_PRS_IPV6_MC_MASK          0xff
#define MVPP2_PRS_IPV6_HOP_MASK         0xff
#define MVPP2_PRS_TCAM_PROTO_MASK       0xff
#define MVPP2_PRS_TCAM_PROTO_MASK_L     0x3f
#define MVPP2_PRS_DBL_VLANS_MAX         100

/* Tcam structure:
 * - lookup ID - 4 bits
 * - port ID - 1 byte
 * - additional information - 1 byte
 * - header data - 8 bytes
 * The fields are represented by MVPP2_PRS_TCAM_DATA_REG(5)->(0).
 */
#define MVPP2_PRS_AI_BITS                       8
#define MVPP2_PRS_PORT_MASK                     0xff
#define MVPP2_PRS_LU_MASK                       0xf
#define MVPP2_PRS_TCAM_DATA_BYTE(offs)          \
                                    (((offs) - ((offs) % 2)) * 2 + ((offs) % 2))
#define MVPP2_PRS_TCAM_DATA_BYTE_EN(offs)       \
                                              (((offs) * 2) - ((offs) % 2)  + 2)
#define MVPP2_PRS_TCAM_AI_BYTE                  16
#define MVPP2_PRS_TCAM_PORT_BYTE                17
#define MVPP2_PRS_TCAM_LU_BYTE                  20
#define MVPP2_PRS_TCAM_EN_OFFS(offs)            ((offs) + 2)
#define MVPP2_PRS_TCAM_INV_WORD                 5
/* Tcam entries ID */
#define MVPP2_PE_DROP_ALL               0
#define MVPP2_PE_FIRST_FREE_TID         1
#define MVPP2_PE_LAST_FREE_TID          (MVPP2_PRS_TCAM_SRAM_SIZE - 31)
#define MVPP2_PE_IP6_EXT_PROTO_UN       (MVPP2_PRS_TCAM_SRAM_SIZE - 30)
#define MVPP2_PE_MAC_MC_IP6             (MVPP2_PRS_TCAM_SRAM_SIZE - 29)
#define MVPP2_PE_IP6_ADDR_UN            (MVPP2_PRS_TCAM_SRAM_SIZE - 28)
#define MVPP2_PE_IP4_ADDR_UN            (MVPP2_PRS_TCAM_SRAM_SIZE - 27)
#define MVPP2_PE_LAST_DEFAULT_FLOW      (MVPP2_PRS_TCAM_SRAM_SIZE - 26)
#define MVPP2_PE_FIRST_DEFAULT_FLOW     (MVPP2_PRS_TCAM_SRAM_SIZE - 19)
#define MVPP2_PE_EDSA_TAGGED            (MVPP2_PRS_TCAM_SRAM_SIZE - 18)
#define MVPP2_PE_EDSA_UNTAGGED          (MVPP2_PRS_TCAM_SRAM_SIZE - 17)
#define MVPP2_PE_DSA_TAGGED             (MVPP2_PRS_TCAM_SRAM_SIZE - 16)
#define MVPP2_PE_DSA_UNTAGGED           (MVPP2_PRS_TCAM_SRAM_SIZE - 15)
#define MVPP2_PE_ETYPE_EDSA_TAGGED      (MVPP2_PRS_TCAM_SRAM_SIZE - 14)
#define MVPP2_PE_ETYPE_EDSA_UNTAGGED    (MVPP2_PRS_TCAM_SRAM_SIZE - 13)
#define MVPP2_PE_ETYPE_DSA_TAGGED       (MVPP2_PRS_TCAM_SRAM_SIZE - 12)
#define MVPP2_PE_ETYPE_DSA_UNTAGGED     (MVPP2_PRS_TCAM_SRAM_SIZE - 11)
#define MVPP2_PE_MH_DEFAULT             (MVPP2_PRS_TCAM_SRAM_SIZE - 10)
#define MVPP2_PE_DSA_DEFAULT            (MVPP2_PRS_TCAM_SRAM_SIZE - 9)
#define MVPP2_PE_IP6_PROTO_UN           (MVPP2_PRS_TCAM_SRAM_SIZE - 8)
#define MVPP2_PE_IP4_PROTO_UN           (MVPP2_PRS_TCAM_SRAM_SIZE - 7)
#define MVPP2_PE_ETH_TYPE_UN            (MVPP2_PRS_TCAM_SRAM_SIZE - 6)
#define MVPP2_PE_VLAN_DBL               (MVPP2_PRS_TCAM_SRAM_SIZE - 5)
#define MVPP2_PE_VLAN_NONE              (MVPP2_PRS_TCAM_SRAM_SIZE - 4)
#define MVPP2_PE_MAC_MC_ALL             (MVPP2_PRS_TCAM_SRAM_SIZE - 3)
#define MVPP2_PE_MAC_PROMISCUOUS        (MVPP2_PRS_TCAM_SRAM_SIZE - 2)
#define MVPP2_PE_MAC_NON_PROMISCUOUS    (MVPP2_PRS_TCAM_SRAM_SIZE - 1)

/* Sram structure
 * The fields are represented by MVPP2_PRS_TCAM_DATA_REG(3)->(0).
 */
#define MVPP2_PRS_SRAM_RI_OFFS                  0
#define MVPP2_PRS_SRAM_RI_WORD                  0
#define MVPP2_PRS_SRAM_RI_CTRL_OFFS             32
#define MVPP2_PRS_SRAM_RI_CTRL_WORD             1
#define MVPP2_PRS_SRAM_RI_CTRL_BITS             32
#define MVPP2_PRS_SRAM_SHIFT_OFFS               64
#define MVPP2_PRS_SRAM_SHIFT_SIGN_BIT           72
#define MVPP2_PRS_SRAM_UDF_OFFS                 73
#define MVPP2_PRS_SRAM_UDF_BITS                 8
#define MVPP2_PRS_SRAM_UDF_MASK                 0xff
#define MVPP2_PRS_SRAM_UDF_SIGN_BIT             81
#define MVPP2_PRS_SRAM_UDF_TYPE_OFFS            82
#define MVPP2_PRS_SRAM_UDF_TYPE_MASK            0x7
#define MVPP2_PRS_SRAM_UDF_TYPE_L3              1
#define MVPP2_PRS_SRAM_UDF_TYPE_L4              4
#define MVPP2_PRS_SRAM_OP_SEL_SHIFT_OFFS        85
#define MVPP2_PRS_SRAM_OP_SEL_SHIFT_MASK        0x3
#define MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD         1
#define MVPP2_PRS_SRAM_OP_SEL_SHIFT_IP4_ADD     2
#define MVPP2_PRS_SRAM_OP_SEL_SHIFT_IP6_ADD     3
#define MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS          87
#define MVPP2_PRS_SRAM_OP_SEL_UDF_BITS          2
#define MVPP2_PRS_SRAM_OP_SEL_UDF_MASK          0x3
#define MVPP2_PRS_SRAM_OP_SEL_UDF_ADD           0
#define MVPP2_PRS_SRAM_OP_SEL_UDF_IP4_ADD       2
#define MVPP2_PRS_SRAM_OP_SEL_UDF_IP6_ADD       3
#define MVPP2_PRS_SRAM_OP_SEL_BASE_OFFS         89
#define MVPP2_PRS_SRAM_AI_OFFS                  90
#define MVPP2_PRS_SRAM_AI_CTRL_OFFS             98
#define MVPP2_PRS_SRAM_AI_CTRL_BITS             8
#define MVPP2_PRS_SRAM_AI_MASK                  0xff
#define MVPP2_PRS_SRAM_NEXT_LU_OFFS             106
#define MVPP2_PRS_SRAM_NEXT_LU_MASK             0xf
#define MVPP2_PRS_SRAM_LU_DONE_BIT              110
#define MVPP2_PRS_SRAM_LU_GEN_BIT               111

/* Sram result info bits assignment */
#define MVPP2_PRS_RI_MAC_ME_MASK                0x1
#define MVPP2_PRS_RI_DSA_MASK                   0x2
#define MVPP2_PRS_RI_VLAN_MASK                  (BIT(2) | BIT(3))
#define MVPP2_PRS_RI_VLAN_NONE                  0x0
#define MVPP2_PRS_RI_VLAN_SINGLE                BIT(2)
#define MVPP2_PRS_RI_VLAN_DOUBLE                BIT(3)
#define MVPP2_PRS_RI_VLAN_TRIPLE                (BIT(2) | BIT(3))
#define MVPP2_PRS_RI_CPU_CODE_MASK              0x70
#define MVPP2_PRS_RI_CPU_CODE_RX_SPEC           BIT(4)
#define MVPP2_PRS_RI_L2_CAST_MASK               (BIT(9) | BIT(10))
#define MVPP2_PRS_RI_L2_UCAST                   0x0
#define MVPP2_PRS_RI_L2_MCAST                   BIT(9)
#define MVPP2_PRS_RI_L2_BCAST                   BIT(10)
#define MVPP2_PRS_RI_PPPOE_MASK                 0x800
#define MVPP2_PRS_RI_L3_PROTO_MASK              (BIT(12) | BIT(13) | BIT(14))
#define MVPP2_PRS_RI_L3_UN                      0x0
#define MVPP2_PRS_RI_L3_IP4                     BIT(12)
#define MVPP2_PRS_RI_L3_IP4_OPT                 BIT(13)
#define MVPP2_PRS_RI_L3_IP4_OTHER               (BIT(12) | BIT(13))
#define MVPP2_PRS_RI_L3_IP6                     BIT(14)
#define MVPP2_PRS_RI_L3_IP6_EXT                 (BIT(12) | BIT(14))
#define MVPP2_PRS_RI_L3_ARP                     (BIT(13) | BIT(14))
#define MVPP2_PRS_RI_L3_ADDR_MASK               (BIT(15) | BIT(16))
#define MVPP2_PRS_RI_L3_UCAST                   0x0
#define MVPP2_PRS_RI_L3_MCAST                   BIT(15)
#define MVPP2_PRS_RI_L3_BCAST                   (BIT(15) | BIT(16))
#define MVPP2_PRS_RI_IP_FRAG_MASK               0x20000
#define MVPP2_PRS_RI_UDF3_MASK                  0x300000
#define MVPP2_PRS_RI_UDF3_RX_SPECIAL            BIT(21)
#define MVPP2_PRS_RI_L4_PROTO_MASK              0x1c00000
#define MVPP2_PRS_RI_L4_TCP                     BIT(22)
#define MVPP2_PRS_RI_L4_UDP                     BIT(23)
#define MVPP2_PRS_RI_L4_OTHER                   (BIT(22) | BIT(23))
#define MVPP2_PRS_RI_UDF7_MASK                  0x60000000
#define MVPP2_PRS_RI_UDF7_IP6_LITE              BIT(29)
#define MVPP2_PRS_RI_DROP_MASK                  0x80000000

/* Sram additional info bits assignment */
#define MVPP2_PRS_IPV4_DIP_AI_BIT               BIT(0)
#define MVPP2_PRS_IPV6_NO_EXT_AI_BIT            BIT(0)
#define MVPP2_PRS_IPV6_EXT_AI_BIT               BIT(1)
#define MVPP2_PRS_IPV6_EXT_AH_AI_BIT            BIT(2)
#define MVPP2_PRS_IPV6_EXT_AH_LEN_AI_BIT        BIT(3)
#define MVPP2_PRS_IPV6_EXT_AH_L4_AI_BIT         BIT(4)
#define MVPP2_PRS_SINGLE_VLAN_AI                0
#define MVPP2_PRS_DBL_VLAN_AI_BIT               BIT(7)

/* DSA/EDSA type */
#define MVPP2_PRS_TAGGED                true
#define MVPP2_PRS_UNTAGGED              false
#define MVPP2_PRS_EDSA                  true
#define MVPP2_PRS_DSA                   false

/* MAC entries, shadow udf */
enum mvpp2_prs_udf {
        MVPP2_PRS_UDF_MAC_DEF,
        MVPP2_PRS_UDF_MAC_RANGE,
        MVPP2_PRS_UDF_L2_DEF,
        MVPP2_PRS_UDF_L2_DEF_COPY,
        MVPP2_PRS_UDF_L2_USER,
};

/* Lookup ID */
enum mvpp2_prs_lookup {
        MVPP2_PRS_LU_MH,
        MVPP2_PRS_LU_MAC,
        MVPP2_PRS_LU_DSA,
        MVPP2_PRS_LU_VLAN,
        MVPP2_PRS_LU_L2,
        MVPP2_PRS_LU_PPPOE,
        MVPP2_PRS_LU_IP4,
        MVPP2_PRS_LU_IP6,
        MVPP2_PRS_LU_FLOWS,
        MVPP2_PRS_LU_LAST,
};

/* L3 cast enum */
enum mvpp2_prs_l3_cast {
        MVPP2_PRS_L3_UNI_CAST,
        MVPP2_PRS_L3_MULTI_CAST,
        MVPP2_PRS_L3_BROAD_CAST
};

/* Classifier constants */
#define MVPP2_CLS_FLOWS_TBL_SIZE        512
#define MVPP2_CLS_FLOWS_TBL_DATA_WORDS  3
#define MVPP2_CLS_LKP_TBL_SIZE          64

/* BM constants */
#define MVPP2_BM_POOLS_NUM              1
#define MVPP2_BM_LONG_BUF_NUM           16
#define MVPP2_BM_SHORT_BUF_NUM          16
#define MVPP2_BM_POOL_SIZE_MAX          (16*1024 - MVPP2_BM_POOL_PTR_ALIGN/4)
#define MVPP2_BM_POOL_PTR_ALIGN         128
#define MVPP2_BM_SWF_LONG_POOL(port)    0

/* BM cookie (32 bits) definition */
#define MVPP2_BM_COOKIE_POOL_OFFS       8
#define MVPP2_BM_COOKIE_CPU_OFFS        24

/* BM short pool packet size
 * These value assure that for SWF the total number
 * of bytes allocated for each buffer will be 512
 */
#define MVPP2_BM_SHORT_PKT_SIZE         MVPP2_RX_MAX_PKT_SIZE(512)

enum mvpp2_bm_type {
        MVPP2_BM_FREE,
        MVPP2_BM_SWF_LONG,
        MVPP2_BM_SWF_SHORT
};

/* Definitions */

/* Shared Packet Processor resources */
struct mvpp2 {
        /* Shared registers' base addresses */
        void __iomem *base;
        void __iomem *lms_base;

        /* List of pointers to port structures */
        struct mvpp2_port **port_list;

        /* Aggregated TXQs */
        struct mvpp2_tx_queue *aggr_txqs;

        /* BM pools */
        struct mvpp2_bm_pool *bm_pools;

        /* PRS shadow table */
        struct mvpp2_prs_shadow *prs_shadow;
        /* PRS auxiliary table for double vlan entries control */
        bool *prs_double_vlans;

        /* Tclk value */
        u32 tclk;

        /* HW version */
        enum { MVPP21, MVPP22 } hw_version;

        struct mii_dev *bus;
};

struct mvpp2_pcpu_stats {
        u64     rx_packets;
        u64     rx_bytes;
        u64     tx_packets;
        u64     tx_bytes;
};

struct mvpp2_port {
        u8 id;

        int irq;

        struct mvpp2 *priv;

        /* Per-port registers' base address */
        void __iomem *base;

        struct mvpp2_rx_queue **rxqs;
        struct mvpp2_tx_queue **txqs;

        int pkt_size;

        u32 pending_cause_rx;

        /* Per-CPU port control */
        struct mvpp2_port_pcpu __percpu *pcpu;

        /* Flags */
        unsigned long flags;

        u16 tx_ring_size;
        u16 rx_ring_size;
        struct mvpp2_pcpu_stats __percpu *stats;

        struct phy_device *phy_dev;
        phy_interface_t phy_interface;
        int phy_node;
        int phyaddr;
        int init;
        unsigned int link;
        unsigned int duplex;
        unsigned int speed;

        struct mvpp2_bm_pool *pool_long;
        struct mvpp2_bm_pool *pool_short;

        /* Index of first port's physical RXQ */
        u8 first_rxq;

        u8 dev_addr[ETH_ALEN];
};

/* The mvpp2_tx_desc and mvpp2_rx_desc structures describe the
 * layout of the transmit and reception DMA descriptors, and their
 * layout is therefore defined by the hardware design
 */

#define MVPP2_TXD_L3_OFF_SHIFT          0
#define MVPP2_TXD_IP_HLEN_SHIFT         8
#define MVPP2_TXD_L4_CSUM_FRAG          BIT(13)
#define MVPP2_TXD_L4_CSUM_NOT           BIT(14)
#define MVPP2_TXD_IP_CSUM_DISABLE       BIT(15)
#define MVPP2_TXD_PADDING_DISABLE       BIT(23)
#define MVPP2_TXD_L4_UDP                BIT(24)
#define MVPP2_TXD_L3_IP6                BIT(26)
#define MVPP2_TXD_L_DESC                BIT(28)
#define MVPP2_TXD_F_DESC                BIT(29)

#define MVPP2_RXD_ERR_SUMMARY           BIT(15)
#define MVPP2_RXD_ERR_CODE_MASK         (BIT(13) | BIT(14))
#define MVPP2_RXD_ERR_CRC               0x0
#define MVPP2_RXD_ERR_OVERRUN           BIT(13)
#define MVPP2_RXD_ERR_RESOURCE          (BIT(13) | BIT(14))
#define MVPP2_RXD_BM_POOL_ID_OFFS       16
#define MVPP2_RXD_BM_POOL_ID_MASK       (BIT(16) | BIT(17) | BIT(18))
#define MVPP2_RXD_HWF_SYNC              BIT(21)
#define MVPP2_RXD_L4_CSUM_OK            BIT(22)
#define MVPP2_RXD_IP4_HEADER_ERR        BIT(24)
#define MVPP2_RXD_L4_TCP                BIT(25)
#define MVPP2_RXD_L4_UDP                BIT(26)
#define MVPP2_RXD_L3_IP4                BIT(28)
#define MVPP2_RXD_L3_IP6                BIT(30)
#define MVPP2_RXD_BUF_HDR               BIT(31)

struct mvpp2_tx_desc {
        u32 command;            /* Options used by HW for packet transmitting.*/
        u8  packet_offset;      /* the offset from the buffer beginning */
        u8  phys_txq;           /* destination queue ID                 */
        u16 data_size;          /* data size of transmitted packet in bytes */
        u32 buf_dma_addr;       /* physical addr of transmitted buffer  */
        u32 buf_cookie;         /* cookie for access to TX buffer in tx path */
        u32 reserved1[3];       /* hw_cmd (for future use, BM, PON, PNC) */
        u32 reserved2;          /* reserved (for future use)            */
};

struct mvpp2_rx_desc {
        u32 status;             /* info about received packet           */
        u16 reserved1;          /* parser_info (for future use, PnC)    */
        u16 data_size;          /* size of received packet in bytes     */
        u32 buf_dma_addr;       /* physical address of the buffer       */
        u32 buf_cookie;         /* cookie for access to RX buffer in rx path */
        u16 reserved2;          /* gem_port_id (for future use, PON)    */
        u16 reserved3;          /* csum_l4 (for future use, PnC)        */
        u8  reserved4;          /* bm_qset (for future use, BM)         */
        u8  reserved5;
        u16 reserved6;          /* classify_info (for future use, PnC)  */
        u32 reserved7;          /* flow_id (for future use, PnC) */
        u32 reserved8;
};

/* Per-CPU Tx queue control */
struct mvpp2_txq_pcpu {
        int cpu;

        /* Number of Tx DMA descriptors in the descriptor ring */
        int size;

        /* Number of currently used Tx DMA descriptor in the
         * descriptor ring
         */
        int count;

        /* Number of Tx DMA descriptors reserved for each CPU */
        int reserved_num;

        /* Index of last TX DMA descriptor that was inserted */
        int txq_put_index;

        /* Index of the TX DMA descriptor to be cleaned up */
        int txq_get_index;
};

struct mvpp2_tx_queue {
        /* Physical number of this Tx queue */
        u8 id;

        /* Logical number of this Tx queue */
        u8 log_id;

        /* Number of Tx DMA descriptors in the descriptor ring */
        int size;

        /* Number of currently used Tx DMA descriptor in the descriptor ring */
        int count;

        /* Per-CPU control of physical Tx queues */
        struct mvpp2_txq_pcpu __percpu *pcpu;

        u32 done_pkts_coal;

        /* Virtual address of thex Tx DMA descriptors array */
        struct mvpp2_tx_desc *descs;

        /* DMA address of the Tx DMA descriptors array */
        dma_addr_t descs_dma;

        /* Index of the last Tx DMA descriptor */
        int last_desc;

        /* Index of the next Tx DMA descriptor to process */
        int next_desc_to_proc;
};

struct mvpp2_rx_queue {
        /* RX queue number, in the range 0-31 for physical RXQs */
        u8 id;

        /* Num of rx descriptors in the rx descriptor ring */
        int size;

        u32 pkts_coal;
        u32 time_coal;

        /* Virtual address of the RX DMA descriptors array */
        struct mvpp2_rx_desc *descs;

        /* DMA address of the RX DMA descriptors array */
        dma_addr_t descs_dma;

        /* Index of the last RX DMA descriptor */
        int last_desc;

        /* Index of the next RX DMA descriptor to process */
        int next_desc_to_proc;

        /* ID of port to which physical RXQ is mapped */
        int port;

        /* Port's logic RXQ number to which physical RXQ is mapped */
        int logic_rxq;
};

union mvpp2_prs_tcam_entry {
        u32 word[MVPP2_PRS_TCAM_WORDS];
        u8  byte[MVPP2_PRS_TCAM_WORDS * 4];
};

union mvpp2_prs_sram_entry {
        u32 word[MVPP2_PRS_SRAM_WORDS];
        u8  byte[MVPP2_PRS_SRAM_WORDS * 4];
};

struct mvpp2_prs_entry {
        u32 index;
        union mvpp2_prs_tcam_entry tcam;
        union mvpp2_prs_sram_entry sram;
};

struct mvpp2_prs_shadow {
        bool valid;
        bool finish;

        /* Lookup ID */
        int lu;

        /* User defined offset */
        int udf;

        /* Result info */
        u32 ri;
        u32 ri_mask;
};

struct mvpp2_cls_flow_entry {
        u32 index;
        u32 data[MVPP2_CLS_FLOWS_TBL_DATA_WORDS];
};

struct mvpp2_cls_lookup_entry {
        u32 lkpid;
        u32 way;
        u32 data;
};

struct mvpp2_bm_pool {
        /* Pool number in the range 0-7 */
        int id;
        enum mvpp2_bm_type type;

        /* Buffer Pointers Pool External (BPPE) size */
        int size;
        /* Number of buffers for this pool */
        int buf_num;
        /* Pool buffer size */
        int buf_size;
        /* Packet size */
        int pkt_size;

        /* BPPE virtual base address */
        unsigned long *virt_addr;
        /* BPPE DMA base address */
        dma_addr_t dma_addr;

        /* Ports using BM pool */
        u32 port_map;

        /* Occupied buffers indicator */
        int in_use_thresh;
};

/* Static declaractions */

/* Number of RXQs used by single port */
static int rxq_number = MVPP2_DEFAULT_RXQ;
/* Number of TXQs used by single port */
static int txq_number = MVPP2_DEFAULT_TXQ;

#define MVPP2_DRIVER_NAME "mvpp2"
#define MVPP2_DRIVER_VERSION "1.0"

/*
 * U-Boot internal data, mostly uncached buffers for descriptors and data
 */
struct buffer_location {
        struct mvpp2_tx_desc *aggr_tx_descs;
        struct mvpp2_tx_desc *tx_descs;
        struct mvpp2_rx_desc *rx_descs;
        unsigned long *bm_pool[MVPP2_BM_POOLS_NUM];
        unsigned long *rx_buffer[MVPP2_BM_LONG_BUF_NUM];
        int first_rxq;
};

/*
 * All 4 interfaces use the same global buffer, since only one interface
 * can be enabled at once
 */
static struct buffer_location buffer_loc;

/*
 * Page table entries are set to 1MB, or multiples of 1MB
 * (not < 1MB). driver uses less bd's so use 1MB bdspace.
 */
#define BD_SPACE        (1 << 20)

/* Utility/helper methods */

static void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data)
{
        writel(data, priv->base + offset);
}

static u32 mvpp2_read(struct mvpp2 *priv, u32 offset)
{
        return readl(priv->base + offset);
}

static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port,
                                      struct mvpp2_tx_desc *tx_desc,
                                      dma_addr_t dma_addr)
{
        tx_desc->buf_dma_addr = dma_addr;
}

static void mvpp2_txdesc_size_set(struct mvpp2_port *port,
                                  struct mvpp2_tx_desc *tx_desc,
                                  size_t size)
{
        tx_desc->data_size = size;
}

static void mvpp2_txdesc_txq_set(struct mvpp2_port *port,
                                 struct mvpp2_tx_desc *tx_desc,
                                 unsigned int txq)
{
        tx_desc->phys_txq = txq;
}

static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port,
                                 struct mvpp2_tx_desc *tx_desc,
                                 unsigned int command)
{
        tx_desc->command = command;
}

static void mvpp2_txdesc_offset_set(struct mvpp2_port *port,
                                    struct mvpp2_tx_desc *tx_desc,
                                    unsigned int offset)
{
        tx_desc->packet_offset = offset;
}

static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port,
                                            struct mvpp2_rx_desc *rx_desc)
{
        return rx_desc->buf_dma_addr;
}

static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port,
                                             struct mvpp2_rx_desc *rx_desc)
{
        return rx_desc->buf_cookie;
}

static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port,
                                    struct mvpp2_rx_desc *rx_desc)
{
        return rx_desc->data_size;
}

static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port,
                                   struct mvpp2_rx_desc *rx_desc)
{
        return rx_desc->status;
}

static void mvpp2_txq_inc_get(struct mvpp2_txq_pcpu *txq_pcpu)
{
        txq_pcpu->txq_get_index++;
        if (txq_pcpu->txq_get_index == txq_pcpu->size)
                txq_pcpu->txq_get_index = 0;
}

/* Get number of physical egress port */
static inline int mvpp2_egress_port(struct mvpp2_port *port)
{
        return MVPP2_MAX_TCONT + port->id;
}

/* Get number of physical TXQ */
static inline int mvpp2_txq_phys(int port, int txq)
{
        return (MVPP2_MAX_TCONT + port) * MVPP2_MAX_TXQ + txq;
}

/* Parser configuration routines */

/* Update parser tcam and sram hw entries */
static int mvpp2_prs_hw_write(struct mvpp2 *priv, struct mvpp2_prs_entry *pe)
{
        int i;

        if (pe->index > MVPP2_PRS_TCAM_SRAM_SIZE - 1)
                return -EINVAL;

        /* Clear entry invalidation bit */
        pe->tcam.word[MVPP2_PRS_TCAM_INV_WORD] &= ~MVPP2_PRS_TCAM_INV_MASK;

        /* Write tcam index - indirect access */
        mvpp2_write(priv, MVPP2_PRS_TCAM_IDX_REG, pe->index);
        for (i = 0; i < MVPP2_PRS_TCAM_WORDS; i++)
                mvpp2_write(priv, MVPP2_PRS_TCAM_DATA_REG(i), pe->tcam.word[i]);

        /* Write sram index - indirect access */
        mvpp2_write(priv, MVPP2_PRS_SRAM_IDX_REG, pe->index);
        for (i = 0; i < MVPP2_PRS_SRAM_WORDS; i++)
                mvpp2_write(priv, MVPP2_PRS_SRAM_DATA_REG(i), pe->sram.word[i]);

        return 0;
}

/* Read tcam entry from hw */
static int mvpp2_prs_hw_read(struct mvpp2 *priv, struct mvpp2_prs_entry *pe)
{
        int i;

        if (pe->index > MVPP2_PRS_TCAM_SRAM_SIZE - 1)
                return -EINVAL;

        /* Write tcam index - indirect access */
        mvpp2_write(priv, MVPP2_PRS_TCAM_IDX_REG, pe->index);

        pe->tcam.word[MVPP2_PRS_TCAM_INV_WORD] = mvpp2_read(priv,
                              MVPP2_PRS_TCAM_DATA_REG(MVPP2_PRS_TCAM_INV_WORD));
        if (pe->tcam.word[MVPP2_PRS_TCAM_INV_WORD] & MVPP2_PRS_TCAM_INV_MASK)
                return MVPP2_PRS_TCAM_ENTRY_INVALID;

        for (i = 0; i < MVPP2_PRS_TCAM_WORDS; i++)
                pe->tcam.word[i] = mvpp2_read(priv, MVPP2_PRS_TCAM_DATA_REG(i));

        /* Write sram index - indirect access */
        mvpp2_write(priv, MVPP2_PRS_SRAM_IDX_REG, pe->index);
        for (i = 0; i < MVPP2_PRS_SRAM_WORDS; i++)
                pe->sram.word[i] = mvpp2_read(priv, MVPP2_PRS_SRAM_DATA_REG(i));

        return 0;
}

/* Invalidate tcam hw entry */
static void mvpp2_prs_hw_inv(struct mvpp2 *priv, int index)
{
        /* Write index - indirect access */
        mvpp2_write(priv, MVPP2_PRS_TCAM_IDX_REG, index);
        mvpp2_write(priv, MVPP2_PRS_TCAM_DATA_REG(MVPP2_PRS_TCAM_INV_WORD),
                    MVPP2_PRS_TCAM_INV_MASK);
}

/* Enable shadow table entry and set its lookup ID */
static void mvpp2_prs_shadow_set(struct mvpp2 *priv, int index, int lu)
{
        priv->prs_shadow[index].valid = true;
        priv->prs_shadow[index].lu = lu;
}

/* Update ri fields in shadow table entry */
static void mvpp2_prs_shadow_ri_set(struct mvpp2 *priv, int index,
                                    unsigned int ri, unsigned int ri_mask)
{
        priv->prs_shadow[index].ri_mask = ri_mask;
        priv->prs_shadow[index].ri = ri;
}

/* Update lookup field in tcam sw entry */
static void mvpp2_prs_tcam_lu_set(struct mvpp2_prs_entry *pe, unsigned int lu)
{
        int enable_off = MVPP2_PRS_TCAM_EN_OFFS(MVPP2_PRS_TCAM_LU_BYTE);

        pe->tcam.byte[MVPP2_PRS_TCAM_LU_BYTE] = lu;
        pe->tcam.byte[enable_off] = MVPP2_PRS_LU_MASK;
}

/* Update mask for single port in tcam sw entry */
static void mvpp2_prs_tcam_port_set(struct mvpp2_prs_entry *pe,
                                    unsigned int port, bool add)
{
        int enable_off = MVPP2_PRS_TCAM_EN_OFFS(MVPP2_PRS_TCAM_PORT_BYTE);

        if (add)
                pe->tcam.byte[enable_off] &= ~(1 << port);
        else
                pe->tcam.byte[enable_off] |= 1 << port;
}

/* Update port map in tcam sw entry */
static void mvpp2_prs_tcam_port_map_set(struct mvpp2_prs_entry *pe,
                                        unsigned int ports)
{
        unsigned char port_mask = MVPP2_PRS_PORT_MASK;
        int enable_off = MVPP2_PRS_TCAM_EN_OFFS(MVPP2_PRS_TCAM_PORT_BYTE);

        pe->tcam.byte[MVPP2_PRS_TCAM_PORT_BYTE] = 0;
        pe->tcam.byte[enable_off] &= ~port_mask;
        pe->tcam.byte[enable_off] |= ~ports & MVPP2_PRS_PORT_MASK;
}

/* Obtain port map from tcam sw entry */
static unsigned int mvpp2_prs_tcam_port_map_get(struct mvpp2_prs_entry *pe)
{
        int enable_off = MVPP2_PRS_TCAM_EN_OFFS(MVPP2_PRS_TCAM_PORT_BYTE);

        return ~(pe->tcam.byte[enable_off]) & MVPP2_PRS_PORT_MASK;
}

/* Set byte of data and its enable bits in tcam sw entry */
static void mvpp2_prs_tcam_data_byte_set(struct mvpp2_prs_entry *pe,
                                         unsigned int offs, unsigned char byte,
                                         unsigned char enable)
{
        pe->tcam.byte[MVPP2_PRS_TCAM_DATA_BYTE(offs)] = byte;
        pe->tcam.byte[MVPP2_PRS_TCAM_DATA_BYTE_EN(offs)] = enable;
}

/* Get byte of data and its enable bits from tcam sw entry */
static void mvpp2_prs_tcam_data_byte_get(struct mvpp2_prs_entry *pe,
                                         unsigned int offs, unsigned char *byte,
                                         unsigned char *enable)
{
        *byte = pe->tcam.byte[MVPP2_PRS_TCAM_DATA_BYTE(offs)];
        *enable = pe->tcam.byte[MVPP2_PRS_TCAM_DATA_BYTE_EN(offs)];
}

/* Set ethertype in tcam sw entry */
static void mvpp2_prs_match_etype(struct mvpp2_prs_entry *pe, int offset,
                                  unsigned short ethertype)
{
        mvpp2_prs_tcam_data_byte_set(pe, offset + 0, ethertype >> 8, 0xff);
        mvpp2_prs_tcam_data_byte_set(pe, offset + 1, ethertype & 0xff, 0xff);
}

/* Set bits in sram sw entry */
static void mvpp2_prs_sram_bits_set(struct mvpp2_prs_entry *pe, int bit_num,
                                    int val)
{
        pe->sram.byte[MVPP2_BIT_TO_BYTE(bit_num)] |= (val << (bit_num % 8));
}

/* Clear bits in sram sw entry */
static void mvpp2_prs_sram_bits_clear(struct mvpp2_prs_entry *pe, int bit_num,
                                      int val)
{
        pe->sram.byte[MVPP2_BIT_TO_BYTE(bit_num)] &= ~(val << (bit_num % 8));
}

/* Update ri bits in sram sw entry */
static void mvpp2_prs_sram_ri_update(struct mvpp2_prs_entry *pe,
                                     unsigned int bits, unsigned int mask)
{
        unsigned int i;

        for (i = 0; i < MVPP2_PRS_SRAM_RI_CTRL_BITS; i++) {
                int ri_off = MVPP2_PRS_SRAM_RI_OFFS;

                if (!(mask & BIT(i)))
                        continue;

                if (bits & BIT(i))
                        mvpp2_prs_sram_bits_set(pe, ri_off + i, 1);
                else
                        mvpp2_prs_sram_bits_clear(pe, ri_off + i, 1);

                mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_RI_CTRL_OFFS + i, 1);
        }
}

/* Update ai bits in sram sw entry */
static void mvpp2_prs_sram_ai_update(struct mvpp2_prs_entry *pe,
                                     unsigned int bits, unsigned int mask)
{
        unsigned int i;
        int ai_off = MVPP2_PRS_SRAM_AI_OFFS;

        for (i = 0; i < MVPP2_PRS_SRAM_AI_CTRL_BITS; i++) {

                if (!(mask & BIT(i)))
                        continue;

                if (bits & BIT(i))
                        mvpp2_prs_sram_bits_set(pe, ai_off + i, 1);
                else
                        mvpp2_prs_sram_bits_clear(pe, ai_off + i, 1);

                mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_AI_CTRL_OFFS + i, 1);
        }
}

/* Read ai bits from sram sw entry */
static int mvpp2_prs_sram_ai_get(struct mvpp2_prs_entry *pe)
{
        u8 bits;
        int ai_off = MVPP2_BIT_TO_BYTE(MVPP2_PRS_SRAM_AI_OFFS);
        int ai_en_off = ai_off + 1;
        int ai_shift = MVPP2_PRS_SRAM_AI_OFFS % 8;

        bits = (pe->sram.byte[ai_off] >> ai_shift) |
               (pe->sram.byte[ai_en_off] << (8 - ai_shift));

        return bits;
}

/* In sram sw entry set lookup ID field of the tcam key to be used in the next
 * lookup interation
 */
static void mvpp2_prs_sram_next_lu_set(struct mvpp2_prs_entry *pe,
                                       unsigned int lu)
{
        int sram_next_off = MVPP2_PRS_SRAM_NEXT_LU_OFFS;

        mvpp2_prs_sram_bits_clear(pe, sram_next_off,
                                  MVPP2_PRS_SRAM_NEXT_LU_MASK);
        mvpp2_prs_sram_bits_set(pe, sram_next_off, lu);
}

/* In the sram sw entry set sign and value of the next lookup offset
 * and the offset value generated to the classifier
 */
static void mvpp2_prs_sram_shift_set(struct mvpp2_prs_entry *pe, int shift,
                                     unsigned int op)
{
        /* Set sign */
        if (shift < 0) {
                mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_SHIFT_SIGN_BIT, 1);
                shift = 0 - shift;
        } else {
                mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_SHIFT_SIGN_BIT, 1);
        }

        /* Set value */
        pe->sram.byte[MVPP2_BIT_TO_BYTE(MVPP2_PRS_SRAM_SHIFT_OFFS)] =
                                                           (unsigned char)shift;

        /* Reset and set operation */
        mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_OP_SEL_SHIFT_OFFS,
                                  MVPP2_PRS_SRAM_OP_SEL_SHIFT_MASK);
        mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_OP_SEL_SHIFT_OFFS, op);

        /* Set base offset as current */
        mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_OP_SEL_BASE_OFFS, 1);
}

/* In the sram sw entry set sign and value of the user defined offset
 * generated to the classifier
 */
static void mvpp2_prs_sram_offset_set(struct mvpp2_prs_entry *pe,
                                      unsigned int type, int offset,
                                      unsigned int op)
{
        /* Set sign */
        if (offset < 0) {
                mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_UDF_SIGN_BIT, 1);
                offset = 0 - offset;
        } else {
                mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_UDF_SIGN_BIT, 1);
        }

        /* Set value */
        mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_UDF_OFFS,
                                  MVPP2_PRS_SRAM_UDF_MASK);
        mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_UDF_OFFS, offset);
        pe->sram.byte[MVPP2_BIT_TO_BYTE(MVPP2_PRS_SRAM_UDF_OFFS +
                                        MVPP2_PRS_SRAM_UDF_BITS)] &=
              ~(MVPP2_PRS_SRAM_UDF_MASK >> (8 - (MVPP2_PRS_SRAM_UDF_OFFS % 8)));
        pe->sram.byte[MVPP2_BIT_TO_BYTE(MVPP2_PRS_SRAM_UDF_OFFS +
                                        MVPP2_PRS_SRAM_UDF_BITS)] |=
                                (offset >> (8 - (MVPP2_PRS_SRAM_UDF_OFFS % 8)));

        /* Set offset type */
        mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_UDF_TYPE_OFFS,
                                  MVPP2_PRS_SRAM_UDF_TYPE_MASK);
        mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_UDF_TYPE_OFFS, type);

        /* Set offset operation */
        mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_MASK);
        mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS, op);

        pe->sram.byte[MVPP2_BIT_TO_BYTE(MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS +
                                        MVPP2_PRS_SRAM_OP_SEL_UDF_BITS)] &=
                                             ~(MVPP2_PRS_SRAM_OP_SEL_UDF_MASK >>
                                    (8 - (MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS % 8)));

        pe->sram.byte[MVPP2_BIT_TO_BYTE(MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS +
                                        MVPP2_PRS_SRAM_OP_SEL_UDF_BITS)] |=
                             (op >> (8 - (MVPP2_PRS_SRAM_OP_SEL_UDF_OFFS % 8)));

        /* Set base offset as current */
        mvpp2_prs_sram_bits_clear(pe, MVPP2_PRS_SRAM_OP_SEL_BASE_OFFS, 1);
}

/* Find parser flow entry */
static struct mvpp2_prs_entry *mvpp2_prs_flow_find(struct mvpp2 *priv, int flow)
{
        struct mvpp2_prs_entry *pe;
        int tid;

        pe = kzalloc(sizeof(*pe), GFP_KERNEL);
        if (!pe)
                return NULL;
        mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_FLOWS);

        /* Go through the all entires with MVPP2_PRS_LU_FLOWS */
        for (tid = MVPP2_PRS_TCAM_SRAM_SIZE - 1; tid >= 0; tid--) {
                u8 bits;

                if (!priv->prs_shadow[tid].valid ||
                    priv->prs_shadow[tid].lu != MVPP2_PRS_LU_FLOWS)
                        continue;

                pe->index = tid;
                mvpp2_prs_hw_read(priv, pe);
                bits = mvpp2_prs_sram_ai_get(pe);

                /* Sram store classification lookup ID in AI bits [5:0] */
                if ((bits & MVPP2_PRS_FLOW_ID_MASK) == flow)
                        return pe;
        }
        kfree(pe);

        return NULL;
}

/* Return first free tcam index, seeking from start to end */
static int mvpp2_prs_tcam_first_free(struct mvpp2 *priv, unsigned char start,
                                     unsigned char end)
{
        int tid;

        if (start > end)
                swap(start, end);

        if (end >= MVPP2_PRS_TCAM_SRAM_SIZE)
                end = MVPP2_PRS_TCAM_SRAM_SIZE - 1;

        for (tid = start; tid <= end; tid++) {
                if (!priv->prs_shadow[tid].valid)
                        return tid;
        }

        return -EINVAL;
}

/* Enable/disable dropping all mac da's */
static void mvpp2_prs_mac_drop_all_set(struct mvpp2 *priv, int port, bool add)
{
        struct mvpp2_prs_entry pe;

        if (priv->prs_shadow[MVPP2_PE_DROP_ALL].valid) {
                /* Entry exist - update port only */
                pe.index = MVPP2_PE_DROP_ALL;
                mvpp2_prs_hw_read(priv, &pe);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);
                pe.index = MVPP2_PE_DROP_ALL;

                /* Non-promiscuous mode for all ports - DROP unknown packets */
                mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_DROP_MASK,
                                         MVPP2_PRS_RI_DROP_MASK);

                mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
                mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);

                /* Update shadow table */
                mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_MAC);

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(&pe, 0);
        }

        /* Update port mask */
        mvpp2_prs_tcam_port_set(&pe, port, add);

        mvpp2_prs_hw_write(priv, &pe);
}

/* Set port to promiscuous mode */
static void mvpp2_prs_mac_promisc_set(struct mvpp2 *priv, int port, bool add)
{
        struct mvpp2_prs_entry pe;

        /* Promiscuous mode - Accept unknown packets */

        if (priv->prs_shadow[MVPP2_PE_MAC_PROMISCUOUS].valid) {
                /* Entry exist - update port only */
                pe.index = MVPP2_PE_MAC_PROMISCUOUS;
                mvpp2_prs_hw_read(priv, &pe);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);
                pe.index = MVPP2_PE_MAC_PROMISCUOUS;

                /* Continue - set next lookup */
                mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_DSA);

                /* Set result info bits */
                mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L2_UCAST,
                                         MVPP2_PRS_RI_L2_CAST_MASK);

                /* Shift to ethertype */
                mvpp2_prs_sram_shift_set(&pe, 2 * ETH_ALEN,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(&pe, 0);

                /* Update shadow table */
                mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_MAC);
        }

        /* Update port mask */
        mvpp2_prs_tcam_port_set(&pe, port, add);

        mvpp2_prs_hw_write(priv, &pe);
}

/* Accept multicast */
static void mvpp2_prs_mac_multi_set(struct mvpp2 *priv, int port, int index,
                                    bool add)
{
        struct mvpp2_prs_entry pe;
        unsigned char da_mc;

        /* Ethernet multicast address first byte is
         * 0x01 for IPv4 and 0x33 for IPv6
         */
        da_mc = (index == MVPP2_PE_MAC_MC_ALL) ? 0x01 : 0x33;

        if (priv->prs_shadow[index].valid) {
                /* Entry exist - update port only */
                pe.index = index;
                mvpp2_prs_hw_read(priv, &pe);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);
                pe.index = index;

                /* Continue - set next lookup */
                mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_DSA);

                /* Set result info bits */
                mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L2_MCAST,
                                         MVPP2_PRS_RI_L2_CAST_MASK);

                /* Update tcam entry data first byte */
                mvpp2_prs_tcam_data_byte_set(&pe, 0, da_mc, 0xff);

                /* Shift to ethertype */
                mvpp2_prs_sram_shift_set(&pe, 2 * ETH_ALEN,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(&pe, 0);

                /* Update shadow table */
                mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_MAC);
        }

        /* Update port mask */
        mvpp2_prs_tcam_port_set(&pe, port, add);

        mvpp2_prs_hw_write(priv, &pe);
}

/* Parser per-port initialization */
static void mvpp2_prs_hw_port_init(struct mvpp2 *priv, int port, int lu_first,
                                   int lu_max, int offset)
{
        u32 val;

        /* Set lookup ID */
        val = mvpp2_read(priv, MVPP2_PRS_INIT_LOOKUP_REG);
        val &= ~MVPP2_PRS_PORT_LU_MASK(port);
        val |=  MVPP2_PRS_PORT_LU_VAL(port, lu_first);
        mvpp2_write(priv, MVPP2_PRS_INIT_LOOKUP_REG, val);

        /* Set maximum number of loops for packet received from port */
        val = mvpp2_read(priv, MVPP2_PRS_MAX_LOOP_REG(port));
        val &= ~MVPP2_PRS_MAX_LOOP_MASK(port);
        val |= MVPP2_PRS_MAX_LOOP_VAL(port, lu_max);
        mvpp2_write(priv, MVPP2_PRS_MAX_LOOP_REG(port), val);

        /* Set initial offset for packet header extraction for the first
         * searching loop
         */
        val = mvpp2_read(priv, MVPP2_PRS_INIT_OFFS_REG(port));
        val &= ~MVPP2_PRS_INIT_OFF_MASK(port);
        val |= MVPP2_PRS_INIT_OFF_VAL(port, offset);
        mvpp2_write(priv, MVPP2_PRS_INIT_OFFS_REG(port), val);
}

/* Default flow entries initialization for all ports */
static void mvpp2_prs_def_flow_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;
        int port;

        for (port = 0; port < MVPP2_MAX_PORTS; port++) {
                memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
                pe.index = MVPP2_PE_FIRST_DEFAULT_FLOW - port;

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(&pe, 0);

                /* Set flow ID*/
                mvpp2_prs_sram_ai_update(&pe, port, MVPP2_PRS_FLOW_ID_MASK);
                mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_DONE_BIT, 1);

                /* Update shadow table and hw entry */
                mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_FLOWS);
                mvpp2_prs_hw_write(priv, &pe);
        }
}

/* Set default entry for Marvell Header field */
static void mvpp2_prs_mh_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));

        pe.index = MVPP2_PE_MH_DEFAULT;
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MH);
        mvpp2_prs_sram_shift_set(&pe, MVPP2_MH_SIZE,
                                 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_MAC);

        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_MH);
        mvpp2_prs_hw_write(priv, &pe);
}

/* Set default entires (place holder) for promiscuous, non-promiscuous and
 * multicast MAC addresses
 */
static void mvpp2_prs_mac_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));

        /* Non-promiscuous mode for all ports - DROP unknown packets */
        pe.index = MVPP2_PE_MAC_NON_PROMISCUOUS;
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);

        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_DROP_MASK,
                                 MVPP2_PRS_RI_DROP_MASK);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);

        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_MAC);
        mvpp2_prs_hw_write(priv, &pe);

        /* place holders only - no ports */
        mvpp2_prs_mac_drop_all_set(priv, 0, false);
        mvpp2_prs_mac_promisc_set(priv, 0, false);
        mvpp2_prs_mac_multi_set(priv, MVPP2_PE_MAC_MC_ALL, 0, false);
        mvpp2_prs_mac_multi_set(priv, MVPP2_PE_MAC_MC_IP6, 0, false);
}

/* Match basic ethertypes */
static int mvpp2_prs_etype_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;
        int tid;

        /* Ethertype: PPPoE */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PROT_PPP_SES);

        mvpp2_prs_sram_shift_set(&pe, MVPP2_PPPOE_HDR_SIZE,
                                 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_PPPOE_MASK,
                                 MVPP2_PRS_RI_PPPOE_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = false;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_PPPOE_MASK,
                                MVPP2_PRS_RI_PPPOE_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        /* Ethertype: ARP */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PROT_ARP);

        /* Generate flow in the next iteration*/
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_ARP,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);
        /* Set L3 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = true;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_L3_ARP,
                                MVPP2_PRS_RI_L3_PROTO_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        /* Ethertype: LBTD */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, MVPP2_IP_LBDT_TYPE);

        /* Generate flow in the next iteration*/
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_CPU_CODE_RX_SPEC |
                                 MVPP2_PRS_RI_UDF3_RX_SPECIAL,
                                 MVPP2_PRS_RI_CPU_CODE_MASK |
                                 MVPP2_PRS_RI_UDF3_MASK);
        /* Set L3 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = true;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_CPU_CODE_RX_SPEC |
                                MVPP2_PRS_RI_UDF3_RX_SPECIAL,
                                MVPP2_PRS_RI_CPU_CODE_MASK |
                                MVPP2_PRS_RI_UDF3_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        /* Ethertype: IPv4 without options */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PROT_IP);
        mvpp2_prs_tcam_data_byte_set(&pe, MVPP2_ETH_TYPE_LEN,
                                     MVPP2_PRS_IPV4_HEAD | MVPP2_PRS_IPV4_IHL,
                                     MVPP2_PRS_IPV4_HEAD_MASK |
                                     MVPP2_PRS_IPV4_IHL_MASK);

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);
        /* Skip eth_type + 4 bytes of IP header */
        mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN + 4,
                                 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        /* Set L3 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = false;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_L3_IP4,
                                MVPP2_PRS_RI_L3_PROTO_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        /* Ethertype: IPv4 with options */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        pe.index = tid;

        /* Clear tcam data before updating */
        pe.tcam.byte[MVPP2_PRS_TCAM_DATA_BYTE(MVPP2_ETH_TYPE_LEN)] = 0x0;
        pe.tcam.byte[MVPP2_PRS_TCAM_DATA_BYTE_EN(MVPP2_ETH_TYPE_LEN)] = 0x0;

        mvpp2_prs_tcam_data_byte_set(&pe, MVPP2_ETH_TYPE_LEN,
                                     MVPP2_PRS_IPV4_HEAD,
                                     MVPP2_PRS_IPV4_HEAD_MASK);

        /* Clear ri before updating */
        pe.sram.word[MVPP2_PRS_SRAM_RI_WORD] = 0x0;
        pe.sram.word[MVPP2_PRS_SRAM_RI_CTRL_WORD] = 0x0;
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4_OPT,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = false;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_L3_IP4_OPT,
                                MVPP2_PRS_RI_L3_PROTO_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        /* Ethertype: IPv6 without options */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PROT_IPV6);

        /* Skip DIP of IPV6 header */
        mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN + 8 +
                                 MVPP2_MAX_L3_ADDR_SIZE,
                                 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP6);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP6,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);
        /* Set L3 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = false;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_L3_IP6,
                                MVPP2_PRS_RI_L3_PROTO_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        /* Default entry for MVPP2_PRS_LU_L2 - Unknown ethtype */
        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = MVPP2_PE_ETH_TYPE_UN;

        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

        /* Generate flow in the next iteration*/
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UN,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);
        /* Set L3 offset even it's unknown L3 */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_L2);
        priv->prs_shadow[pe.index].udf = MVPP2_PRS_UDF_L2_DEF;
        priv->prs_shadow[pe.index].finish = true;
        mvpp2_prs_shadow_ri_set(priv, pe.index, MVPP2_PRS_RI_L3_UN,
                                MVPP2_PRS_RI_L3_PROTO_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Parser default initialization */
static int mvpp2_prs_default_init(struct udevice *dev,
                                  struct mvpp2 *priv)
{
        int err, index, i;

        /* Enable tcam table */
        mvpp2_write(priv, MVPP2_PRS_TCAM_CTRL_REG, MVPP2_PRS_TCAM_EN_MASK);

        /* Clear all tcam and sram entries */
        for (index = 0; index < MVPP2_PRS_TCAM_SRAM_SIZE; index++) {
                mvpp2_write(priv, MVPP2_PRS_TCAM_IDX_REG, index);
                for (i = 0; i < MVPP2_PRS_TCAM_WORDS; i++)
                        mvpp2_write(priv, MVPP2_PRS_TCAM_DATA_REG(i), 0);

                mvpp2_write(priv, MVPP2_PRS_SRAM_IDX_REG, index);
                for (i = 0; i < MVPP2_PRS_SRAM_WORDS; i++)
                        mvpp2_write(priv, MVPP2_PRS_SRAM_DATA_REG(i), 0);
        }

        /* Invalidate all tcam entries */
        for (index = 0; index < MVPP2_PRS_TCAM_SRAM_SIZE; index++)
                mvpp2_prs_hw_inv(priv, index);

        priv->prs_shadow = devm_kcalloc(dev, MVPP2_PRS_TCAM_SRAM_SIZE,
                                        sizeof(struct mvpp2_prs_shadow),
                                        GFP_KERNEL);
        if (!priv->prs_shadow)
                return -ENOMEM;

        /* Always start from lookup = 0 */
        for (index = 0; index < MVPP2_MAX_PORTS; index++)
                mvpp2_prs_hw_port_init(priv, index, MVPP2_PRS_LU_MH,
                                       MVPP2_PRS_PORT_LU_MAX, 0);

        mvpp2_prs_def_flow_init(priv);

        mvpp2_prs_mh_init(priv);

        mvpp2_prs_mac_init(priv);

        err = mvpp2_prs_etype_init(priv);
        if (err)
                return err;

        return 0;
}

/* Compare MAC DA with tcam entry data */
static bool mvpp2_prs_mac_range_equals(struct mvpp2_prs_entry *pe,
                                       const u8 *da, unsigned char *mask)
{
        unsigned char tcam_byte, tcam_mask;
        int index;

        for (index = 0; index < ETH_ALEN; index++) {
                mvpp2_prs_tcam_data_byte_get(pe, index, &tcam_byte, &tcam_mask);
                if (tcam_mask != mask[index])
                        return false;

                if ((tcam_mask & tcam_byte) != (da[index] & mask[index]))
                        return false;
        }

        return true;
}

/* Find tcam entry with matched pair <MAC DA, port> */
static struct mvpp2_prs_entry *
mvpp2_prs_mac_da_range_find(struct mvpp2 *priv, int pmap, const u8 *da,
                            unsigned char *mask, int udf_type)
{
        struct mvpp2_prs_entry *pe;
        int tid;

        pe = kzalloc(sizeof(*pe), GFP_KERNEL);
        if (!pe)
                return NULL;
        mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_MAC);

        /* Go through the all entires with MVPP2_PRS_LU_MAC */
        for (tid = MVPP2_PE_FIRST_FREE_TID;
             tid <= MVPP2_PE_LAST_FREE_TID; tid++) {
                unsigned int entry_pmap;

                if (!priv->prs_shadow[tid].valid ||
                    (priv->prs_shadow[tid].lu != MVPP2_PRS_LU_MAC) ||
                    (priv->prs_shadow[tid].udf != udf_type))
                        continue;

                pe->index = tid;
                mvpp2_prs_hw_read(priv, pe);
                entry_pmap = mvpp2_prs_tcam_port_map_get(pe);

                if (mvpp2_prs_mac_range_equals(pe, da, mask) &&
                    entry_pmap == pmap)
                        return pe;
        }
        kfree(pe);

        return NULL;
}

/* Update parser's mac da entry */
static int mvpp2_prs_mac_da_accept(struct mvpp2 *priv, int port,
                                   const u8 *da, bool add)
{
        struct mvpp2_prs_entry *pe;
        unsigned int pmap, len, ri;
        unsigned char mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
        int tid;

        /* Scan TCAM and see if entry with this <MAC DA, port> already exist */
        pe = mvpp2_prs_mac_da_range_find(priv, (1 << port), da, mask,
                                         MVPP2_PRS_UDF_MAC_DEF);

        /* No such entry */
        if (!pe) {
                if (!add)
                        return 0;

                /* Create new TCAM entry */
                /* Find first range mac entry*/
                for (tid = MVPP2_PE_FIRST_FREE_TID;
                     tid <= MVPP2_PE_LAST_FREE_TID; tid++)
                        if (priv->prs_shadow[tid].valid &&
                            (priv->prs_shadow[tid].lu == MVPP2_PRS_LU_MAC) &&
                            (priv->prs_shadow[tid].udf ==
                                                       MVPP2_PRS_UDF_MAC_RANGE))
                                break;

                /* Go through the all entries from first to last */
                tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                                tid - 1);
                if (tid < 0)
                        return tid;

                pe = kzalloc(sizeof(*pe), GFP_KERNEL);
                if (!pe)
                        return -1;
                mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_MAC);
                pe->index = tid;

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(pe, 0);
        }

        /* Update port mask */
        mvpp2_prs_tcam_port_set(pe, port, add);

        /* Invalidate the entry if no ports are left enabled */
        pmap = mvpp2_prs_tcam_port_map_get(pe);
        if (pmap == 0) {
                if (add) {
                        kfree(pe);
                        return -1;
                }
                mvpp2_prs_hw_inv(priv, pe->index);
                priv->prs_shadow[pe->index].valid = false;
                kfree(pe);
                return 0;
        }

        /* Continue - set next lookup */
        mvpp2_prs_sram_next_lu_set(pe, MVPP2_PRS_LU_DSA);

        /* Set match on DA */
        len = ETH_ALEN;
        while (len--)
                mvpp2_prs_tcam_data_byte_set(pe, len, da[len], 0xff);

        /* Set result info bits */
        ri = MVPP2_PRS_RI_L2_UCAST | MVPP2_PRS_RI_MAC_ME_MASK;

        mvpp2_prs_sram_ri_update(pe, ri, MVPP2_PRS_RI_L2_CAST_MASK |
                                 MVPP2_PRS_RI_MAC_ME_MASK);
        mvpp2_prs_shadow_ri_set(priv, pe->index, ri, MVPP2_PRS_RI_L2_CAST_MASK |
                                MVPP2_PRS_RI_MAC_ME_MASK);

        /* Shift to ethertype */
        mvpp2_prs_sram_shift_set(pe, 2 * ETH_ALEN,
                                 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        /* Update shadow table and hw entry */
        priv->prs_shadow[pe->index].udf = MVPP2_PRS_UDF_MAC_DEF;
        mvpp2_prs_shadow_set(priv, pe->index, MVPP2_PRS_LU_MAC);
        mvpp2_prs_hw_write(priv, pe);

        kfree(pe);

        return 0;
}

static int mvpp2_prs_update_mac_da(struct mvpp2_port *port, const u8 *da)
{
        int err;

        /* Remove old parser entry */
        err = mvpp2_prs_mac_da_accept(port->priv, port->id, port->dev_addr,
                                      false);
        if (err)
                return err;

        /* Add new parser entry */
        err = mvpp2_prs_mac_da_accept(port->priv, port->id, da, true);
        if (err)
                return err;

        /* Set addr in the device */
        memcpy(port->dev_addr, da, ETH_ALEN);

        return 0;
}

/* Set prs flow for the port */
static int mvpp2_prs_def_flow(struct mvpp2_port *port)
{
        struct mvpp2_prs_entry *pe;
        int tid;

        pe = mvpp2_prs_flow_find(port->priv, port->id);

        /* Such entry not exist */
        if (!pe) {
                /* Go through the all entires from last to first */
                tid = mvpp2_prs_tcam_first_free(port->priv,
                                                MVPP2_PE_LAST_FREE_TID,
                                               MVPP2_PE_FIRST_FREE_TID);
                if (tid < 0)
                        return tid;

                pe = kzalloc(sizeof(*pe), GFP_KERNEL);
                if (!pe)
                        return -ENOMEM;

                mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_FLOWS);
                pe->index = tid;

                /* Set flow ID*/
                mvpp2_prs_sram_ai_update(pe, port->id, MVPP2_PRS_FLOW_ID_MASK);
                mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_LU_DONE_BIT, 1);

                /* Update shadow table */
                mvpp2_prs_shadow_set(port->priv, pe->index, MVPP2_PRS_LU_FLOWS);
        }

        mvpp2_prs_tcam_port_map_set(pe, (1 << port->id));
        mvpp2_prs_hw_write(port->priv, pe);
        kfree(pe);

        return 0;
}

/* Classifier configuration routines */

/* Update classification flow table registers */
static void mvpp2_cls_flow_write(struct mvpp2 *priv,
                                 struct mvpp2_cls_flow_entry *fe)
{
        mvpp2_write(priv, MVPP2_CLS_FLOW_INDEX_REG, fe->index);
        mvpp2_write(priv, MVPP2_CLS_FLOW_TBL0_REG,  fe->data[0]);
        mvpp2_write(priv, MVPP2_CLS_FLOW_TBL1_REG,  fe->data[1]);
        mvpp2_write(priv, MVPP2_CLS_FLOW_TBL2_REG,  fe->data[2]);
}

/* Update classification lookup table register */
static void mvpp2_cls_lookup_write(struct mvpp2 *priv,
                                   struct mvpp2_cls_lookup_entry *le)
{
        u32 val;

        val = (le->way << MVPP2_CLS_LKP_INDEX_WAY_OFFS) | le->lkpid;
        mvpp2_write(priv, MVPP2_CLS_LKP_INDEX_REG, val);
        mvpp2_write(priv, MVPP2_CLS_LKP_TBL_REG, le->data);
}

/* Classifier default initialization */
static void mvpp2_cls_init(struct mvpp2 *priv)
{
        struct mvpp2_cls_lookup_entry le;
        struct mvpp2_cls_flow_entry fe;
        int index;

        /* Enable classifier */
        mvpp2_write(priv, MVPP2_CLS_MODE_REG, MVPP2_CLS_MODE_ACTIVE_MASK);

        /* Clear classifier flow table */
        memset(&fe.data, 0, MVPP2_CLS_FLOWS_TBL_DATA_WORDS);
        for (index = 0; index < MVPP2_CLS_FLOWS_TBL_SIZE; index++) {
                fe.index = index;
                mvpp2_cls_flow_write(priv, &fe);
        }

        /* Clear classifier lookup table */
        le.data = 0;
        for (index = 0; index < MVPP2_CLS_LKP_TBL_SIZE; index++) {
                le.lkpid = index;
                le.way = 0;
                mvpp2_cls_lookup_write(priv, &le);

                le.way = 1;
                mvpp2_cls_lookup_write(priv, &le);
        }
}

static void mvpp2_cls_port_config(struct mvpp2_port *port)
{
        struct mvpp2_cls_lookup_entry le;
        u32 val;

        /* Set way for the port */
        val = mvpp2_read(port->priv, MVPP2_CLS_PORT_WAY_REG);
        val &= ~MVPP2_CLS_PORT_WAY_MASK(port->id);
        mvpp2_write(port->priv, MVPP2_CLS_PORT_WAY_REG, val);

        /* Pick the entry to be accessed in lookup ID decoding table
         * according to the way and lkpid.
         */
        le.lkpid = port->id;
        le.way = 0;
        le.data = 0;

        /* Set initial CPU queue for receiving packets */
        le.data &= ~MVPP2_CLS_LKP_TBL_RXQ_MASK;
        le.data |= port->first_rxq;

        /* Disable classification engines */
        le.data &= ~MVPP2_CLS_LKP_TBL_LOOKUP_EN_MASK;

        /* Update lookup ID table entry */
        mvpp2_cls_lookup_write(port->priv, &le);
}

/* Set CPU queue number for oversize packets */
static void mvpp2_cls_oversize_rxq_set(struct mvpp2_port *port)
{
        u32 val;

        mvpp2_write(port->priv, MVPP2_CLS_OVERSIZE_RXQ_LOW_REG(port->id),
                    port->first_rxq & MVPP2_CLS_OVERSIZE_RXQ_LOW_MASK);

        mvpp2_write(port->priv, MVPP2_CLS_SWFWD_P2HQ_REG(port->id),
                    (port->first_rxq >> MVPP2_CLS_OVERSIZE_RXQ_LOW_BITS));

        val = mvpp2_read(port->priv, MVPP2_CLS_SWFWD_PCTRL_REG);
        val |= MVPP2_CLS_SWFWD_PCTRL_MASK(port->id);
        mvpp2_write(port->priv, MVPP2_CLS_SWFWD_PCTRL_REG, val);
}

/* Buffer Manager configuration routines */

/* Create pool */
static int mvpp2_bm_pool_create(struct udevice *dev,
                                struct mvpp2 *priv,
                                struct mvpp2_bm_pool *bm_pool, int size)
{
        u32 val;

        bm_pool->virt_addr = buffer_loc.bm_pool[bm_pool->id];
        bm_pool->dma_addr = (dma_addr_t)buffer_loc.bm_pool[bm_pool->id];
        if (!bm_pool->virt_addr)
                return -ENOMEM;

        if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr,
                        MVPP2_BM_POOL_PTR_ALIGN)) {
                dev_err(&pdev->dev, "BM pool %d is not %d bytes aligned\n",
                        bm_pool->id, MVPP2_BM_POOL_PTR_ALIGN);
                return -ENOMEM;
        }

        mvpp2_write(priv, MVPP2_BM_POOL_BASE_REG(bm_pool->id),
                    bm_pool->dma_addr);
        mvpp2_write(priv, MVPP2_BM_POOL_SIZE_REG(bm_pool->id), size);

        val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id));
        val |= MVPP2_BM_START_MASK;
        mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val);

        bm_pool->type = MVPP2_BM_FREE;
        bm_pool->size = size;
        bm_pool->pkt_size = 0;
        bm_pool->buf_num = 0;

        return 0;
}

/* Set pool buffer size */
static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv,
                                      struct mvpp2_bm_pool *bm_pool,
                                      int buf_size)
{
        u32 val;

        bm_pool->buf_size = buf_size;

        val = ALIGN(buf_size, 1 << MVPP2_POOL_BUF_SIZE_OFFSET);
        mvpp2_write(priv, MVPP2_POOL_BUF_SIZE_REG(bm_pool->id), val);
}

/* Free all buffers from the pool */
static void mvpp2_bm_bufs_free(struct udevice *dev, struct mvpp2 *priv,
                               struct mvpp2_bm_pool *bm_pool)
{
        bm_pool->buf_num = 0;
}

/* Cleanup pool */
static int mvpp2_bm_pool_destroy(struct udevice *dev,
                                 struct mvpp2 *priv,
                                 struct mvpp2_bm_pool *bm_pool)
{
        u32 val;

        mvpp2_bm_bufs_free(dev, priv, bm_pool);
        if (bm_pool->buf_num) {
                dev_err(dev, "cannot free all buffers in pool %d\n", bm_pool->id);
                return 0;
        }

        val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id));
        val |= MVPP2_BM_STOP_MASK;
        mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val);

        return 0;
}

static int mvpp2_bm_pools_init(struct udevice *dev,
                               struct mvpp2 *priv)
{
        int i, err, size;
        struct mvpp2_bm_pool *bm_pool;

        /* Create all pools with maximum size */
        size = MVPP2_BM_POOL_SIZE_MAX;
        for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) {
                bm_pool = &priv->bm_pools[i];
                bm_pool->id = i;
                err = mvpp2_bm_pool_create(dev, priv, bm_pool, size);
                if (err)
                        goto err_unroll_pools;
                mvpp2_bm_pool_bufsize_set(priv, bm_pool, 0);
        }
        return 0;

err_unroll_pools:
        dev_err(&pdev->dev, "failed to create BM pool %d, size %d\n", i, size);
        for (i = i - 1; i >= 0; i--)
                mvpp2_bm_pool_destroy(dev, priv, &priv->bm_pools[i]);
        return err;
}

static int mvpp2_bm_init(struct udevice *dev, struct mvpp2 *priv)
{
        int i, err;

        for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) {
                /* Mask BM all interrupts */
                mvpp2_write(priv, MVPP2_BM_INTR_MASK_REG(i), 0);
                /* Clear BM cause register */
                mvpp2_write(priv, MVPP2_BM_INTR_CAUSE_REG(i), 0);
        }

        /* Allocate and initialize BM pools */
        priv->bm_pools = devm_kcalloc(dev, MVPP2_BM_POOLS_NUM,
                                     sizeof(struct mvpp2_bm_pool), GFP_KERNEL);
        if (!priv->bm_pools)
                return -ENOMEM;

        err = mvpp2_bm_pools_init(dev, priv);
        if (err < 0)
                return err;
        return 0;
}

/* Attach long pool to rxq */
static void mvpp2_rxq_long_pool_set(struct mvpp2_port *port,
                                    int lrxq, int long_pool)
{
        u32 val;
        int prxq;

        /* Get queue physical ID */
        prxq = port->rxqs[lrxq]->id;

        val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
        val &= ~MVPP2_RXQ_POOL_LONG_MASK;
        val |= ((long_pool << MVPP2_RXQ_POOL_LONG_OFFS) &
                    MVPP2_RXQ_POOL_LONG_MASK);

        mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
}

/* Set pool number in a BM cookie */
static inline u32 mvpp2_bm_cookie_pool_set(u32 cookie, int pool)
{
        u32 bm;

        bm = cookie & ~(0xFF << MVPP2_BM_COOKIE_POOL_OFFS);
        bm |= ((pool & 0xFF) << MVPP2_BM_COOKIE_POOL_OFFS);

        return bm;
}

/* Get pool number from a BM cookie */
static inline int mvpp2_bm_cookie_pool_get(unsigned long cookie)
{
        return (cookie >> MVPP2_BM_COOKIE_POOL_OFFS) & 0xFF;
}

/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
                                     dma_addr_t buf_dma_addr,
                                     unsigned long buf_phys_addr)
{
        /* MVPP2_BM_VIRT_RLS_REG is not interpreted by HW, and simply
         * returned in the "cookie" field of the RX
         * descriptor. Instead of storing the virtual address, we
         * store the physical address
         */
        mvpp2_write(port->priv, MVPP2_BM_VIRT_RLS_REG, buf_phys_addr);
        mvpp2_write(port->priv, MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr);
}

/* Refill BM pool */
static void mvpp2_pool_refill(struct mvpp2_port *port, u32 bm,
                              dma_addr_t dma_addr,
                              phys_addr_t phys_addr)
{
        int pool = mvpp2_bm_cookie_pool_get(bm);

        mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr);
}

/* Allocate buffers for the pool */
static int mvpp2_bm_bufs_add(struct mvpp2_port *port,
                             struct mvpp2_bm_pool *bm_pool, int buf_num)
{
        int i;

        if (buf_num < 0 ||
            (buf_num + bm_pool->buf_num > bm_pool->size)) {
                netdev_err(port->dev,
                           "cannot allocate %d buffers for pool %d\n",
                           buf_num, bm_pool->id);
                return 0;
        }

        for (i = 0; i < buf_num; i++) {
                mvpp2_bm_pool_put(port, bm_pool->id,
                                  (dma_addr_t)buffer_loc.rx_buffer[i],
                                  (unsigned long)buffer_loc.rx_buffer[i]);

        }

        /* Update BM driver with number of buffers added to pool */
        bm_pool->buf_num += i;
        bm_pool->in_use_thresh = bm_pool->buf_num / 4;

        return i;
}

/* Notify the driver that BM pool is being used as specific type and return the
 * pool pointer on success
 */
static struct mvpp2_bm_pool *
mvpp2_bm_pool_use(struct mvpp2_port *port, int pool, enum mvpp2_bm_type type,
                  int pkt_size)
{
        struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool];
        int num;

        if (new_pool->type != MVPP2_BM_FREE && new_pool->type != type) {
                netdev_err(port->dev, "mixing pool types is forbidden\n");
                return NULL;
        }

        if (new_pool->type == MVPP2_BM_FREE)
                new_pool->type = type;

        /* Allocate buffers in case BM pool is used as long pool, but packet
         * size doesn't match MTU or BM pool hasn't being used yet
         */
        if (((type == MVPP2_BM_SWF_LONG) && (pkt_size > new_pool->pkt_size)) ||
            (new_pool->pkt_size == 0)) {
                int pkts_num;

                /* Set default buffer number or free all the buffers in case
                 * the pool is not empty
                 */
                pkts_num = new_pool->buf_num;
                if (pkts_num == 0)
                        pkts_num = type == MVPP2_BM_SWF_LONG ?
                                   MVPP2_BM_LONG_BUF_NUM :
                                   MVPP2_BM_SHORT_BUF_NUM;
                else
                        mvpp2_bm_bufs_free(NULL,
                                           port->priv, new_pool);

                new_pool->pkt_size = pkt_size;

                /* Allocate buffers for this pool */
                num = mvpp2_bm_bufs_add(port, new_pool, pkts_num);
                if (num != pkts_num) {
                        dev_err(dev, "pool %d: %d of %d allocated\n",
                                new_pool->id, num, pkts_num);
                        return NULL;
                }
        }

        mvpp2_bm_pool_bufsize_set(port->priv, new_pool,
                                  MVPP2_RX_BUF_SIZE(new_pool->pkt_size));

        return new_pool;
}

/* Initialize pools for swf */
static int mvpp2_swf_bm_pool_init(struct mvpp2_port *port)
{
        int rxq;

        if (!port->pool_long) {
                port->pool_long =
                       mvpp2_bm_pool_use(port, MVPP2_BM_SWF_LONG_POOL(port->id),
                                         MVPP2_BM_SWF_LONG,
                                         port->pkt_size);
                if (!port->pool_long)
                        return -ENOMEM;

                port->pool_long->port_map |= (1 << port->id);

                for (rxq = 0; rxq < rxq_number; rxq++)
                        mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id);
        }

        return 0;
}

/* Port configuration routines */

static void mvpp2_port_mii_set(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_2_REG);

        switch (port->phy_interface) {
        case PHY_INTERFACE_MODE_SGMII:
                val |= MVPP2_GMAC_INBAND_AN_MASK;
                break;
        case PHY_INTERFACE_MODE_RGMII:
                val |= MVPP2_GMAC_PORT_RGMII_MASK;
        default:
                val &= ~MVPP2_GMAC_PCS_ENABLE_MASK;
        }

        writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);
}

static void mvpp2_port_fc_adv_enable(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
        val |= MVPP2_GMAC_FC_ADV_EN;
        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
}

static void mvpp2_port_enable(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
        val |= MVPP2_GMAC_PORT_EN_MASK;
        val |= MVPP2_GMAC_MIB_CNTR_EN_MASK;
        writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);
}

static void mvpp2_port_disable(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
        val &= ~(MVPP2_GMAC_PORT_EN_MASK);
        writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);
}

/* Set IEEE 802.3x Flow Control Xon Packet Transmission Mode */
static void mvpp2_port_periodic_xon_disable(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_1_REG) &
                    ~MVPP2_GMAC_PERIODIC_XON_EN_MASK;
        writel(val, port->base + MVPP2_GMAC_CTRL_1_REG);
}

/* Configure loopback port */
static void mvpp2_port_loopback_set(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_1_REG);

        if (port->speed == 1000)
                val |= MVPP2_GMAC_GMII_LB_EN_MASK;
        else
                val &= ~MVPP2_GMAC_GMII_LB_EN_MASK;

        if (port->phy_interface == PHY_INTERFACE_MODE_SGMII)
                val |= MVPP2_GMAC_PCS_LB_EN_MASK;
        else
                val &= ~MVPP2_GMAC_PCS_LB_EN_MASK;

        writel(val, port->base + MVPP2_GMAC_CTRL_1_REG);
}

static void mvpp2_port_reset(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) &
                    ~MVPP2_GMAC_PORT_RESET_MASK;
        writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);

        while (readl(port->base + MVPP2_GMAC_CTRL_2_REG) &
               MVPP2_GMAC_PORT_RESET_MASK)
                continue;
}

/* Change maximum receive size of the port */
static inline void mvpp2_gmac_max_rx_size_set(struct mvpp2_port *port)
{
        u32 val;

        val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
        val &= ~MVPP2_GMAC_MAX_RX_SIZE_MASK;
        val |= (((port->pkt_size - MVPP2_MH_SIZE) / 2) <<
                    MVPP2_GMAC_MAX_RX_SIZE_OFFS);
        writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);
}

/* Set defaults to the MVPP2 port */
static void mvpp2_defaults_set(struct mvpp2_port *port)
{
        int tx_port_num, val, queue, ptxq, lrxq;

        /* Configure port to loopback if needed */
        if (port->flags & MVPP2_F_LOOPBACK)
                mvpp2_port_loopback_set(port);

        /* Update TX FIFO MIN Threshold */
        val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
        val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK;
        /* Min. TX threshold must be less than minimal packet length */
        val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2);
        writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);

        /* Disable Legacy WRR, Disable EJP, Release from reset */
        tx_port_num = mvpp2_egress_port(port);
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG,
                    tx_port_num);
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0);

        /* Close bandwidth for all queues */
        for (queue = 0; queue < MVPP2_MAX_TXQ; queue++) {
                ptxq = mvpp2_txq_phys(port->id, queue);
                mvpp2_write(port->priv,
                            MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(ptxq), 0);
        }

        /* Set refill period to 1 usec, refill tokens
         * and bucket size to maximum
         */
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG, 0xc8);
        val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_REFILL_REG);
        val &= ~MVPP2_TXP_REFILL_PERIOD_ALL_MASK;
        val |= MVPP2_TXP_REFILL_PERIOD_MASK(1);
        val |= MVPP2_TXP_REFILL_TOKENS_ALL_MASK;
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_REFILL_REG, val);
        val = MVPP2_TXP_TOKEN_SIZE_MAX;
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val);

        /* Set MaximumLowLatencyPacketSize value to 256 */
        mvpp2_write(port->priv, MVPP2_RX_CTRL_REG(port->id),
                    MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK |
                    MVPP2_RX_LOW_LATENCY_PKT_SIZE(256));

        /* Enable Rx cache snoop */
        for (lrxq = 0; lrxq < rxq_number; lrxq++) {
                queue = port->rxqs[lrxq]->id;
                val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
                val |= MVPP2_SNOOP_PKT_SIZE_MASK |
                           MVPP2_SNOOP_BUF_HDR_MASK;
                mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
        }
}

/* Enable/disable receiving packets */
static void mvpp2_ingress_enable(struct mvpp2_port *port)
{
        u32 val;
        int lrxq, queue;

        for (lrxq = 0; lrxq < rxq_number; lrxq++) {
                queue = port->rxqs[lrxq]->id;
                val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
                val &= ~MVPP2_RXQ_DISABLE_MASK;
                mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
        }
}

static void mvpp2_ingress_disable(struct mvpp2_port *port)
{
        u32 val;
        int lrxq, queue;

        for (lrxq = 0; lrxq < rxq_number; lrxq++) {
                queue = port->rxqs[lrxq]->id;
                val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
                val |= MVPP2_RXQ_DISABLE_MASK;
                mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
        }
}

/* Enable transmit via physical egress queue
 * - HW starts take descriptors from DRAM
 */
static void mvpp2_egress_enable(struct mvpp2_port *port)
{
        u32 qmap;
        int queue;
        int tx_port_num = mvpp2_egress_port(port);

        /* Enable all initialized TXs. */
        qmap = 0;
        for (queue = 0; queue < txq_number; queue++) {
                struct mvpp2_tx_queue *txq = port->txqs[queue];

                if (txq->descs != NULL)
                        qmap |= (1 << queue);
        }

        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, qmap);
}

/* Disable transmit via physical egress queue
 * - HW doesn't take descriptors from DRAM
 */
static void mvpp2_egress_disable(struct mvpp2_port *port)
{
        u32 reg_data;
        int delay;
        int tx_port_num = mvpp2_egress_port(port);

        /* Issue stop command for active channels only */
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);
        reg_data = (mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG)) &
                    MVPP2_TXP_SCHED_ENQ_MASK;
        if (reg_data != 0)
                mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG,
                            (reg_data << MVPP2_TXP_SCHED_DISQ_OFFSET));

        /* Wait for all Tx activity to terminate. */
        delay = 0;
        do {
                if (delay >= MVPP2_TX_DISABLE_TIMEOUT_MSEC) {
                        netdev_warn(port->dev,
                                    "Tx stop timed out, status=0x%08x\n",
                                    reg_data);
                        break;
                }
                mdelay(1);
                delay++;

                /* Check port TX Command register that all
                 * Tx queues are stopped
                 */
                reg_data = mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG);
        } while (reg_data & MVPP2_TXP_SCHED_ENQ_MASK);
}

/* Rx descriptors helper methods */

/* Get number of Rx descriptors occupied by received packets */
static inline int
mvpp2_rxq_received(struct mvpp2_port *port, int rxq_id)
{
        u32 val = mvpp2_read(port->priv, MVPP2_RXQ_STATUS_REG(rxq_id));

        return val & MVPP2_RXQ_OCCUPIED_MASK;
}

/* Update Rx queue status with the number of occupied and available
 * Rx descriptor slots.
 */
static inline void
mvpp2_rxq_status_update(struct mvpp2_port *port, int rxq_id,
                        int used_count, int free_count)
{
        /* Decrement the number of used descriptors and increment count
         * increment the number of free descriptors.
         */
        u32 val = used_count | (free_count << MVPP2_RXQ_NUM_NEW_OFFSET);

        mvpp2_write(port->priv, MVPP2_RXQ_STATUS_UPDATE_REG(rxq_id), val);
}

/* Get pointer to next RX descriptor to be processed by SW */
static inline struct mvpp2_rx_desc *
mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq)
{
        int rx_desc = rxq->next_desc_to_proc;

        rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc);
        prefetch(rxq->descs + rxq->next_desc_to_proc);
        return rxq->descs + rx_desc;
}

/* Set rx queue offset */
static void mvpp2_rxq_offset_set(struct mvpp2_port *port,
                                 int prxq, int offset)
{
        u32 val;

        /* Convert offset from bytes to units of 32 bytes */
        offset = offset >> 5;

        val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
        val &= ~MVPP2_RXQ_PACKET_OFFSET_MASK;

        /* Offset is in */
        val |= ((offset << MVPP2_RXQ_PACKET_OFFSET_OFFS) &
                    MVPP2_RXQ_PACKET_OFFSET_MASK);

        mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
}

/* Obtain BM cookie information from descriptor */
static u32 mvpp2_bm_cookie_build(struct mvpp2_port *port,
                                 struct mvpp2_rx_desc *rx_desc)
{
        int cpu = smp_processor_id();
        int pool;

        pool = (mvpp2_rxdesc_status_get(port, rx_desc) &
                MVPP2_RXD_BM_POOL_ID_MASK) >>
                MVPP2_RXD_BM_POOL_ID_OFFS;

        return ((pool & 0xFF) << MVPP2_BM_COOKIE_POOL_OFFS) |
               ((cpu & 0xFF) << MVPP2_BM_COOKIE_CPU_OFFS);
}

/* Tx descriptors helper methods */

/* Get number of Tx descriptors waiting to be transmitted by HW */
static int mvpp2_txq_pend_desc_num_get(struct mvpp2_port *port,
                                       struct mvpp2_tx_queue *txq)
{
        u32 val;

        mvpp2_write(port->priv, MVPP2_TXQ_NUM_REG, txq->id);
        val = mvpp2_read(port->priv, MVPP2_TXQ_PENDING_REG);

        return val & MVPP2_TXQ_PENDING_MASK;
}

/* Get pointer to next Tx descriptor to be processed (send) by HW */
static struct mvpp2_tx_desc *
mvpp2_txq_next_desc_get(struct mvpp2_tx_queue *txq)
{
        int tx_desc = txq->next_desc_to_proc;

        txq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(txq, tx_desc);
        return txq->descs + tx_desc;
}

/* Update HW with number of aggregated Tx descriptors to be sent */
static void mvpp2_aggr_txq_pend_desc_add(struct mvpp2_port *port, int pending)
{
        /* aggregated access - relevant TXQ number is written in TX desc */
        mvpp2_write(port->priv, MVPP2_AGGR_TXQ_UPDATE_REG, pending);
}

/* Get number of sent descriptors and decrement counter.
 * The number of sent descriptors is returned.
 * Per-CPU access
 */
static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port,
                                           struct mvpp2_tx_queue *txq)
{
        u32 val;

        /* Reading status reg resets transmitted descriptor counter */
        val = mvpp2_read(port->priv, MVPP2_TXQ_SENT_REG(txq->id));

        return (val & MVPP2_TRANSMITTED_COUNT_MASK) >>
                MVPP2_TRANSMITTED_COUNT_OFFSET;
}

static void mvpp2_txq_sent_counter_clear(void *arg)
{
        struct mvpp2_port *port = arg;
        int queue;

        for (queue = 0; queue < txq_number; queue++) {
                int id = port->txqs[queue]->id;

                mvpp2_read(port->priv, MVPP2_TXQ_SENT_REG(id));
        }
}

/* Set max sizes for Tx queues */
static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port)
{
        u32     val, size, mtu;
        int     txq, tx_port_num;

        mtu = port->pkt_size * 8;
        if (mtu > MVPP2_TXP_MTU_MAX)
                mtu = MVPP2_TXP_MTU_MAX;

        /* WA for wrong Token bucket update: Set MTU value = 3*real MTU value */
        mtu = 3 * mtu;

        /* Indirect access to registers */
        tx_port_num = mvpp2_egress_port(port);
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);

        /* Set MTU */
        val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_MTU_REG);
        val &= ~MVPP2_TXP_MTU_MAX;
        val |= mtu;
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_MTU_REG, val);

        /* TXP token size and all TXQs token size must be larger that MTU */
        val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG);
        size = val & MVPP2_TXP_TOKEN_SIZE_MAX;
        if (size < mtu) {
                size = mtu;
                val &= ~MVPP2_TXP_TOKEN_SIZE_MAX;
                val |= size;
                mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val);
        }

        for (txq = 0; txq < txq_number; txq++) {
                val = mvpp2_read(port->priv,
                                 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq));
                size = val & MVPP2_TXQ_TOKEN_SIZE_MAX;

                if (size < mtu) {
                        size = mtu;
                        val &= ~MVPP2_TXQ_TOKEN_SIZE_MAX;
                        val |= size;
                        mvpp2_write(port->priv,
                                    MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq),
                                    val);
                }
        }
}

/* Free Tx queue skbuffs */
static void mvpp2_txq_bufs_free(struct mvpp2_port *port,
                                struct mvpp2_tx_queue *txq,
                                struct mvpp2_txq_pcpu *txq_pcpu, int num)
{
        int i;

        for (i = 0; i < num; i++)
                mvpp2_txq_inc_get(txq_pcpu);
}

static inline struct mvpp2_rx_queue *mvpp2_get_rx_queue(struct mvpp2_port *port,
                                                        u32 cause)
{
        int queue = fls(cause) - 1;

        return port->rxqs[queue];
}

static inline struct mvpp2_tx_queue *mvpp2_get_tx_queue(struct mvpp2_port *port,
                                                        u32 cause)
{
        int queue = fls(cause) - 1;

        return port->txqs[queue];
}

/* Rx/Tx queue initialization/cleanup methods */

/* Allocate and initialize descriptors for aggr TXQ */
static int mvpp2_aggr_txq_init(struct udevice *dev,
                               struct mvpp2_tx_queue *aggr_txq,
                               int desc_num, int cpu,
                               struct mvpp2 *priv)
{
        /* Allocate memory for TX descriptors */
        aggr_txq->descs = buffer_loc.aggr_tx_descs;
        aggr_txq->descs_dma = (dma_addr_t)buffer_loc.aggr_tx_descs;
        if (!aggr_txq->descs)
                return -ENOMEM;

        /* Make sure descriptor address is cache line size aligned  */
        BUG_ON(aggr_txq->descs !=
               PTR_ALIGN(aggr_txq->descs, MVPP2_CPU_D_CACHE_LINE_SIZE));

        aggr_txq->last_desc = aggr_txq->size - 1;

        /* Aggr TXQ no reset WA */
        aggr_txq->next_desc_to_proc = mvpp2_read(priv,
                                                 MVPP2_AGGR_TXQ_INDEX_REG(cpu));

        /* Set Tx descriptors queue starting address */
        /* indirect access */
        mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(cpu),
                    aggr_txq->descs_dma);
        mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(cpu), desc_num);

        return 0;
}

/* Create a specified Rx queue */
static int mvpp2_rxq_init(struct mvpp2_port *port,
                          struct mvpp2_rx_queue *rxq)

{
        rxq->size = port->rx_ring_size;

        /* Allocate memory for RX descriptors */
        rxq->descs = buffer_loc.rx_descs;
        rxq->descs_dma = (dma_addr_t)buffer_loc.rx_descs;
        if (!rxq->descs)
                return -ENOMEM;

        BUG_ON(rxq->descs !=
               PTR_ALIGN(rxq->descs, MVPP2_CPU_D_CACHE_LINE_SIZE));

        rxq->last_desc = rxq->size - 1;

        /* Zero occupied and non-occupied counters - direct access */
        mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0);

        /* Set Rx descriptors queue starting address - indirect access */
        mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id);
        mvpp2_write(port->priv, MVPP2_RXQ_DESC_ADDR_REG, rxq->descs_dma);
        mvpp2_write(port->priv, MVPP2_RXQ_DESC_SIZE_REG, rxq->size);
        mvpp2_write(port->priv, MVPP2_RXQ_INDEX_REG, 0);

        /* Set Offset */
        mvpp2_rxq_offset_set(port, rxq->id, NET_SKB_PAD);

        /* Add number of descriptors ready for receiving packets */
        mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size);

        return 0;
}

/* Push packets received by the RXQ to BM pool */
static void mvpp2_rxq_drop_pkts(struct mvpp2_port *port,
                                struct mvpp2_rx_queue *rxq)
{
        int rx_received, i;

        rx_received = mvpp2_rxq_received(port, rxq->id);
        if (!rx_received)
                return;

        for (i = 0; i < rx_received; i++) {
                struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq);
                u32 bm = mvpp2_bm_cookie_build(port, rx_desc);

                mvpp2_pool_refill(port, bm,
                                  mvpp2_rxdesc_dma_addr_get(port, rx_desc),
                                  mvpp2_rxdesc_cookie_get(port, rx_desc));
        }
        mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received);
}

/* Cleanup Rx queue */
static void mvpp2_rxq_deinit(struct mvpp2_port *port,
                             struct mvpp2_rx_queue *rxq)
{
        mvpp2_rxq_drop_pkts(port, rxq);

        rxq->descs             = NULL;
        rxq->last_desc         = 0;
        rxq->next_desc_to_proc = 0;
        rxq->descs_dma         = 0;

        /* Clear Rx descriptors queue starting address and size;
         * free descriptor number
         */
        mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0);
        mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id);
        mvpp2_write(port->priv, MVPP2_RXQ_DESC_ADDR_REG, 0);
        mvpp2_write(port->priv, MVPP2_RXQ_DESC_SIZE_REG, 0);
}

/* Create and initialize a Tx queue */
static int mvpp2_txq_init(struct mvpp2_port *port,
                          struct mvpp2_tx_queue *txq)
{
        u32 val;
        int cpu, desc, desc_per_txq, tx_port_num;
        struct mvpp2_txq_pcpu *txq_pcpu;

        txq->size = port->tx_ring_size;

        /* Allocate memory for Tx descriptors */
        txq->descs = buffer_loc.tx_descs;
        txq->descs_dma = (dma_addr_t)buffer_loc.tx_descs;
        if (!txq->descs)
                return -ENOMEM;

        /* Make sure descriptor address is cache line size aligned  */
        BUG_ON(txq->descs !=
               PTR_ALIGN(txq->descs, MVPP2_CPU_D_CACHE_LINE_SIZE));

        txq->last_desc = txq->size - 1;

        /* Set Tx descriptors queue starting address - indirect access */
        mvpp2_write(port->priv, MVPP2_TXQ_NUM_REG, txq->id);
        mvpp2_write(port->priv, MVPP2_TXQ_DESC_ADDR_REG, txq->descs_dma);
        mvpp2_write(port->priv, MVPP2_TXQ_DESC_SIZE_REG, txq->size &
                                             MVPP2_TXQ_DESC_SIZE_MASK);
        mvpp2_write(port->priv, MVPP2_TXQ_INDEX_REG, 0);
        mvpp2_write(port->priv, MVPP2_TXQ_RSVD_CLR_REG,
                    txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET);
        val = mvpp2_read(port->priv, MVPP2_TXQ_PENDING_REG);
        val &= ~MVPP2_TXQ_PENDING_MASK;
        mvpp2_write(port->priv, MVPP2_TXQ_PENDING_REG, val);

        /* Calculate base address in prefetch buffer. We reserve 16 descriptors
         * for each existing TXQ.
         * TCONTS for PON port must be continuous from 0 to MVPP2_MAX_TCONT
         * GBE ports assumed to be continious from 0 to MVPP2_MAX_PORTS
         */
        desc_per_txq = 16;
        desc = (port->id * MVPP2_MAX_TXQ * desc_per_txq) +
               (txq->log_id * desc_per_txq);

        mvpp2_write(port->priv, MVPP2_TXQ_PREF_BUF_REG,
                    MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 |
                    MVPP2_PREF_BUF_THRESH(desc_per_txq/2));

        /* WRR / EJP configuration - indirect access */
        tx_port_num = mvpp2_egress_port(port);
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);

        val = mvpp2_read(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id));
        val &= ~MVPP2_TXQ_REFILL_PERIOD_ALL_MASK;
        val |= MVPP2_TXQ_REFILL_PERIOD_MASK(1);
        val |= MVPP2_TXQ_REFILL_TOKENS_ALL_MASK;
        mvpp2_write(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id), val);

        val = MVPP2_TXQ_TOKEN_SIZE_MAX;
        mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq->log_id),
                    val);

        for_each_present_cpu(cpu) {
                txq_pcpu = per_cpu_ptr(txq->pcpu, cpu);
                txq_pcpu->size = txq->size;
        }

        return 0;
}

/* Free allocated TXQ resources */
static void mvpp2_txq_deinit(struct mvpp2_port *port,
                             struct mvpp2_tx_queue *txq)
{
        txq->descs             = NULL;
        txq->last_desc         = 0;
        txq->next_desc_to_proc = 0;
        txq->descs_dma         = 0;

        /* Set minimum bandwidth for disabled TXQs */
        mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(txq->id), 0);

        /* Set Tx descriptors queue starting address and size */
        mvpp2_write(port->priv, MVPP2_TXQ_NUM_REG, txq->id);
        mvpp2_write(port->priv, MVPP2_TXQ_DESC_ADDR_REG, 0);
        mvpp2_write(port->priv, MVPP2_TXQ_DESC_SIZE_REG, 0);
}

/* Cleanup Tx ports */
static void mvpp2_txq_clean(struct mvpp2_port *port, struct mvpp2_tx_queue *txq)
{
        struct mvpp2_txq_pcpu *txq_pcpu;
        int delay, pending, cpu;
        u32 val;

        mvpp2_write(port->priv, MVPP2_TXQ_NUM_REG, txq->id);
        val = mvpp2_read(port->priv, MVPP2_TXQ_PREF_BUF_REG);
        val |= MVPP2_TXQ_DRAIN_EN_MASK;
        mvpp2_write(port->priv, MVPP2_TXQ_PREF_BUF_REG, val);

        /* The napi queue has been stopped so wait for all packets
         * to be transmitted.
         */
        delay = 0;
        do {
                if (delay >= MVPP2_TX_PENDING_TIMEOUT_MSEC) {
                        netdev_warn(port->dev,
                                    "port %d: cleaning queue %d timed out\n",
                                    port->id, txq->log_id);
                        break;
                }
                mdelay(1);
                delay++;

                pending = mvpp2_txq_pend_desc_num_get(port, txq);
        } while (pending);

        val &= ~MVPP2_TXQ_DRAIN_EN_MASK;
        mvpp2_write(port->priv, MVPP2_TXQ_PREF_BUF_REG, val);

        for_each_present_cpu(cpu) {
                txq_pcpu = per_cpu_ptr(txq->pcpu, cpu);

                /* Release all packets */
                mvpp2_txq_bufs_free(port, txq, txq_pcpu, txq_pcpu->count);

                /* Reset queue */
                txq_pcpu->count = 0;
                txq_pcpu->txq_put_index = 0;
                txq_pcpu->txq_get_index = 0;
        }
}

/* Cleanup all Tx queues */
static void mvpp2_cleanup_txqs(struct mvpp2_port *port)
{
        struct mvpp2_tx_queue *txq;
        int queue;
        u32 val;

        val = mvpp2_read(port->priv, MVPP2_TX_PORT_FLUSH_REG);

        /* Reset Tx ports and delete Tx queues */
        val |= MVPP2_TX_PORT_FLUSH_MASK(port->id);
        mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val);

        for (queue = 0; queue < txq_number; queue++) {
                txq = port->txqs[queue];
                mvpp2_txq_clean(port, txq);
                mvpp2_txq_deinit(port, txq);
        }

        mvpp2_txq_sent_counter_clear(port);

        val &= ~MVPP2_TX_PORT_FLUSH_MASK(port->id);
        mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val);
}

/* Cleanup all Rx queues */
static void mvpp2_cleanup_rxqs(struct mvpp2_port *port)
{
        int queue;

        for (queue = 0; queue < rxq_number; queue++)
                mvpp2_rxq_deinit(port, port->rxqs[queue]);
}

/* Init all Rx queues for port */
static int mvpp2_setup_rxqs(struct mvpp2_port *port)
{
        int queue, err;

        for (queue = 0; queue < rxq_number; queue++) {
                err = mvpp2_rxq_init(port, port->rxqs[queue]);
                if (err)
                        goto err_cleanup;
        }
        return 0;

err_cleanup:
        mvpp2_cleanup_rxqs(port);
        return err;
}

/* Init all tx queues for port */
static int mvpp2_setup_txqs(struct mvpp2_port *port)
{
        struct mvpp2_tx_queue *txq;
        int queue, err;

        for (queue = 0; queue < txq_number; queue++) {
                txq = port->txqs[queue];
                err = mvpp2_txq_init(port, txq);
                if (err)
                        goto err_cleanup;
        }

        mvpp2_txq_sent_counter_clear(port);
        return 0;

err_cleanup:
        mvpp2_cleanup_txqs(port);
        return err;
}

/* Adjust link */
static void mvpp2_link_event(struct mvpp2_port *port)
{
        struct phy_device *phydev = port->phy_dev;
        int status_change = 0;
        u32 val;

        if (phydev->link) {
                if ((port->speed != phydev->speed) ||
                    (port->duplex != phydev->duplex)) {
                        u32 val;

                        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
                        val &= ~(MVPP2_GMAC_CONFIG_MII_SPEED |
                                 MVPP2_GMAC_CONFIG_GMII_SPEED |
                                 MVPP2_GMAC_CONFIG_FULL_DUPLEX |
                                 MVPP2_GMAC_AN_SPEED_EN |
                                 MVPP2_GMAC_AN_DUPLEX_EN);

                        if (phydev->duplex)
                                val |= MVPP2_GMAC_CONFIG_FULL_DUPLEX;

                        if (phydev->speed == SPEED_1000)
                                val |= MVPP2_GMAC_CONFIG_GMII_SPEED;
                        else if (phydev->speed == SPEED_100)
                                val |= MVPP2_GMAC_CONFIG_MII_SPEED;

                        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);

                        port->duplex = phydev->duplex;
                        port->speed  = phydev->speed;
                }
        }

        if (phydev->link != port->link) {
                if (!phydev->link) {
                        port->duplex = -1;
                        port->speed = 0;
                }

                port->link = phydev->link;
                status_change = 1;
        }

        if (status_change) {
                if (phydev->link) {
                        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
                        val |= (MVPP2_GMAC_FORCE_LINK_PASS |
                                MVPP2_GMAC_FORCE_LINK_DOWN);
                        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
                        mvpp2_egress_enable(port);
                        mvpp2_ingress_enable(port);
                } else {
                        mvpp2_ingress_disable(port);
                        mvpp2_egress_disable(port);
                }
        }
}

/* Main RX/TX processing routines */

/* Display more error info */
static void mvpp2_rx_error(struct mvpp2_port *port,
                           struct mvpp2_rx_desc *rx_desc)
{
        u32 status = mvpp2_rxdesc_status_get(port, rx_desc);
        size_t sz = mvpp2_rxdesc_size_get(port, rx_desc);

        switch (status & MVPP2_RXD_ERR_CODE_MASK) {
        case MVPP2_RXD_ERR_CRC:
                netdev_err(port->dev, "bad rx status %08x (crc error), size=%zu\n",
                           status, sz);
                break;
        case MVPP2_RXD_ERR_OVERRUN:
                netdev_err(port->dev, "bad rx status %08x (overrun error), size=%zu\n",
                           status, sz);
                break;
        case MVPP2_RXD_ERR_RESOURCE:
                netdev_err(port->dev, "bad rx status %08x (resource error), size=%zu\n",
                           status, sz);
                break;
        }
}

/* Reuse skb if possible, or allocate a new skb and add it to BM pool */
static int mvpp2_rx_refill(struct mvpp2_port *port,
                           struct mvpp2_bm_pool *bm_pool,
                           u32 bm, dma_addr_t dma_addr)
{
        mvpp2_pool_refill(port, bm, dma_addr, (unsigned long)dma_addr);
        return 0;
}

/* Set hw internals when starting port */
static void mvpp2_start_dev(struct mvpp2_port *port)
{
        mvpp2_gmac_max_rx_size_set(port);
        mvpp2_txp_max_tx_size_set(port);

        mvpp2_port_enable(port);
}

/* Set hw internals when stopping port */
static void mvpp2_stop_dev(struct mvpp2_port *port)
{
        /* Stop new packets from arriving to RXQs */
        mvpp2_ingress_disable(port);

        mvpp2_egress_disable(port);
        mvpp2_port_disable(port);
}

static int mvpp2_phy_connect(struct udevice *dev, struct mvpp2_port *port)
{
        struct phy_device *phy_dev;

        if (!port->init || port->link == 0) {
                phy_dev = phy_connect(port->priv->bus, port->phyaddr, dev,
                                      port->phy_interface);
                port->phy_dev = phy_dev;
                if (!phy_dev) {
                        netdev_err(port->dev, "cannot connect to phy\n");
                        return -ENODEV;
                }
                phy_dev->supported &= PHY_GBIT_FEATURES;
                phy_dev->advertising = phy_dev->supported;

                port->phy_dev = phy_dev;
                port->link    = 0;
                port->duplex  = 0;
                port->speed   = 0;

                phy_config(phy_dev);
                phy_startup(phy_dev);
                if (!phy_dev->link) {
                        printf("%s: No link\n", phy_dev->dev->name);
                        return -1;
                }

                port->init = 1;
        } else {
                mvpp2_egress_enable(port);
                mvpp2_ingress_enable(port);
        }

        return 0;
}

static int mvpp2_open(struct udevice *dev, struct mvpp2_port *port)
{
        unsigned char mac_bcast[ETH_ALEN] = {
                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
        int err;

        err = mvpp2_prs_mac_da_accept(port->priv, port->id, mac_bcast, true);
        if (err) {
                netdev_err(dev, "mvpp2_prs_mac_da_accept BC failed\n");
                return err;
        }
        err = mvpp2_prs_mac_da_accept(port->priv, port->id,
                                      port->dev_addr, true);
        if (err) {
                netdev_err(dev, "mvpp2_prs_mac_da_accept MC failed\n");
                return err;
        }
        err = mvpp2_prs_def_flow(port);
        if (err) {
                netdev_err(dev, "mvpp2_prs_def_flow failed\n");
                return err;
        }

        /* Allocate the Rx/Tx queues */
        err = mvpp2_setup_rxqs(port);
        if (err) {
                netdev_err(port->dev, "cannot allocate Rx queues\n");
                return err;
        }

        err = mvpp2_setup_txqs(port);
        if (err) {
                netdev_err(port->dev, "cannot allocate Tx queues\n");
                return err;
        }

        err = mvpp2_phy_connect(dev, port);
        if (err < 0)
                return err;

        mvpp2_link_event(port);

        mvpp2_start_dev(port);

        return 0;
}

/* No Device ops here in U-Boot */

/* Driver initialization */

static void mvpp2_port_power_up(struct mvpp2_port *port)
{
        mvpp2_port_mii_set(port);
        mvpp2_port_periodic_xon_disable(port);
        mvpp2_port_fc_adv_enable(port);
        mvpp2_port_reset(port);
}

/* Initialize port HW */
static int mvpp2_port_init(struct udevice *dev, struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        struct mvpp2_txq_pcpu *txq_pcpu;
        int queue, cpu, err;

        if (port->first_rxq + rxq_number > MVPP2_RXQ_TOTAL_NUM)
                return -EINVAL;

        /* Disable port */
        mvpp2_egress_disable(port);
        mvpp2_port_disable(port);

        port->txqs = devm_kcalloc(dev, txq_number, sizeof(*port->txqs),
                                  GFP_KERNEL);
        if (!port->txqs)
                return -ENOMEM;

        /* Associate physical Tx queues to this port and initialize.
         * The mapping is predefined.
         */
        for (queue = 0; queue < txq_number; queue++) {
                int queue_phy_id = mvpp2_txq_phys(port->id, queue);
                struct mvpp2_tx_queue *txq;

                txq = devm_kzalloc(dev, sizeof(*txq), GFP_KERNEL);
                if (!txq)
                        return -ENOMEM;

                txq->pcpu = devm_kzalloc(dev, sizeof(struct mvpp2_txq_pcpu),
                                         GFP_KERNEL);
                if (!txq->pcpu)
                        return -ENOMEM;

                txq->id = queue_phy_id;
                txq->log_id = queue;
                txq->done_pkts_coal = MVPP2_TXDONE_COAL_PKTS_THRESH;
                for_each_present_cpu(cpu) {
                        txq_pcpu = per_cpu_ptr(txq->pcpu, cpu);
                        txq_pcpu->cpu = cpu;
                }

                port->txqs[queue] = txq;
        }

        port->rxqs = devm_kcalloc(dev, rxq_number, sizeof(*port->rxqs),
                                  GFP_KERNEL);
        if (!port->rxqs)
                return -ENOMEM;

        /* Allocate and initialize Rx queue for this port */
        for (queue = 0; queue < rxq_number; queue++) {
                struct mvpp2_rx_queue *rxq;

                /* Map physical Rx queue to port's logical Rx queue */
                rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL);
                if (!rxq)
                        return -ENOMEM;
                /* Map this Rx queue to a physical queue */
                rxq->id = port->first_rxq + queue;
                rxq->port = port->id;
                rxq->logic_rxq = queue;

                port->rxqs[queue] = rxq;
        }

        /* Configure Rx queue group interrupt for this port */
        mvpp2_write(priv, MVPP2_ISR_RXQ_GROUP_REG(port->id), CONFIG_MV_ETH_RXQ);

        /* Create Rx descriptor rings */
        for (queue = 0; queue < rxq_number; queue++) {
                struct mvpp2_rx_queue *rxq = port->rxqs[queue];

                rxq->size = port->rx_ring_size;
                rxq->pkts_coal = MVPP2_RX_COAL_PKTS;
                rxq->time_coal = MVPP2_RX_COAL_USEC;
        }

        mvpp2_ingress_disable(port);

        /* Port default configuration */
        mvpp2_defaults_set(port);

        /* Port's classifier configuration */
        mvpp2_cls_oversize_rxq_set(port);
        mvpp2_cls_port_config(port);

        /* Provide an initial Rx packet size */
        port->pkt_size = MVPP2_RX_PKT_SIZE(PKTSIZE_ALIGN);

        /* Initialize pools for swf */
        err = mvpp2_swf_bm_pool_init(port);
        if (err)
                return err;

        return 0;
}

/* Ports initialization */
static int mvpp2_port_probe(struct udevice *dev,
                            struct mvpp2_port *port,
                            int port_node,
                            struct mvpp2 *priv,
                            int *next_first_rxq)
{
        int phy_node;
        u32 id;
        u32 phyaddr;
        const char *phy_mode_str;
        int phy_mode = -1;
        int priv_common_regs_num = 2;
        int err;

        phy_node = fdtdec_lookup_phandle(gd->fdt_blob, port_node, "phy");
        if (phy_node < 0) {
                dev_err(&pdev->dev, "missing phy\n");
                return -ENODEV;
        }

        phy_mode_str = fdt_getprop(gd->fdt_blob, port_node, "phy-mode", NULL);
        if (phy_mode_str)
                phy_mode = phy_get_interface_by_name(phy_mode_str);
        if (phy_mode == -1) {
                dev_err(&pdev->dev, "incorrect phy mode\n");
                return -EINVAL;
        }

        id = fdtdec_get_int(gd->fdt_blob, port_node, "port-id", -1);
        if (id == -1) {
                dev_err(&pdev->dev, "missing port-id value\n");
                return -EINVAL;
        }

        phyaddr = fdtdec_get_int(gd->fdt_blob, phy_node, "reg", 0);

        port->priv = priv;
        port->id = id;
        port->first_rxq = *next_first_rxq;
        port->phy_node = phy_node;
        port->phy_interface = phy_mode;
        port->phyaddr = phyaddr;

        port->base = (void __iomem *)dev_get_addr_index(dev->parent,
                                                        priv_common_regs_num
                                                        + id);
        if (IS_ERR(port->base))
                return PTR_ERR(port->base);

        port->tx_ring_size = MVPP2_MAX_TXD;
        port->rx_ring_size = MVPP2_MAX_RXD;

        err = mvpp2_port_init(dev, port);
        if (err < 0) {
                dev_err(&pdev->dev, "failed to init port %d\n", id);
                return err;
        }
        mvpp2_port_power_up(port);

        /* Increment the first Rx queue number to be used by the next port */
        *next_first_rxq += CONFIG_MV_ETH_RXQ;
        priv->port_list[id] = port;
        return 0;
}

/* Initialize decoding windows */
static void mvpp2_conf_mbus_windows(const struct mbus_dram_target_info *dram,
                                    struct mvpp2 *priv)
{
        u32 win_enable;
        int i;

        for (i = 0; i < 6; i++) {
                mvpp2_write(priv, MVPP2_WIN_BASE(i), 0);
                mvpp2_write(priv, MVPP2_WIN_SIZE(i), 0);

                if (i < 4)
                        mvpp2_write(priv, MVPP2_WIN_REMAP(i), 0);
        }

        win_enable = 0;

        for (i = 0; i < dram->num_cs; i++) {
                const struct mbus_dram_window *cs = dram->cs + i;

                mvpp2_write(priv, MVPP2_WIN_BASE(i),
                            (cs->base & 0xffff0000) | (cs->mbus_attr << 8) |
                            dram->mbus_dram_target_id);

                mvpp2_write(priv, MVPP2_WIN_SIZE(i),
                            (cs->size - 1) & 0xffff0000);

                win_enable |= (1 << i);
        }

        mvpp2_write(priv, MVPP2_BASE_ADDR_ENABLE, win_enable);
}

/* Initialize Rx FIFO's */
static void mvpp2_rx_fifo_init(struct mvpp2 *priv)
{
        int port;

        for (port = 0; port < MVPP2_MAX_PORTS; port++) {
                mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port),
                            MVPP2_RX_FIFO_PORT_DATA_SIZE);
                mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port),
                            MVPP2_RX_FIFO_PORT_ATTR_SIZE);
        }

        mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG,
                    MVPP2_RX_FIFO_PORT_MIN_PKT);
        mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1);
}

/* Initialize network controller common part HW */
static int mvpp2_init(struct udevice *dev, struct mvpp2 *priv)
{
        const struct mbus_dram_target_info *dram_target_info;
        int err, i;
        u32 val;

        /* Checks for hardware constraints (U-Boot uses only one rxq) */
        if ((rxq_number > MVPP2_MAX_RXQ) || (txq_number > MVPP2_MAX_TXQ)) {
                dev_err(&pdev->dev, "invalid queue size parameter\n");
                return -EINVAL;
        }

        /* MBUS windows configuration */
        dram_target_info = mvebu_mbus_dram_info();
        if (dram_target_info)
                mvpp2_conf_mbus_windows(dram_target_info, priv);

        /* Disable HW PHY polling */
        val = readl(priv->lms_base + MVPP2_PHY_AN_CFG0_REG);
        val |= MVPP2_PHY_AN_STOP_SMI0_MASK;
        writel(val, priv->lms_base + MVPP2_PHY_AN_CFG0_REG);

        /* Allocate and initialize aggregated TXQs */
        priv->aggr_txqs = devm_kcalloc(dev, num_present_cpus(),
                                       sizeof(struct mvpp2_tx_queue),
                                       GFP_KERNEL);
        if (!priv->aggr_txqs)
                return -ENOMEM;

        for_each_present_cpu(i) {
                priv->aggr_txqs[i].id = i;
                priv->aggr_txqs[i].size = MVPP2_AGGR_TXQ_SIZE;
                err = mvpp2_aggr_txq_init(dev, &priv->aggr_txqs[i],
                                          MVPP2_AGGR_TXQ_SIZE, i, priv);
                if (err < 0)
                        return err;
        }

        /* Rx Fifo Init */
        mvpp2_rx_fifo_init(priv);

        /* Reset Rx queue group interrupt configuration */
        for (i = 0; i < MVPP2_MAX_PORTS; i++)
                mvpp2_write(priv, MVPP2_ISR_RXQ_GROUP_REG(i),
                            CONFIG_MV_ETH_RXQ);

        writel(MVPP2_EXT_GLOBAL_CTRL_DEFAULT,
               priv->lms_base + MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG);

        /* Allow cache snoop when transmiting packets */
        mvpp2_write(priv, MVPP2_TX_SNOOP_REG, 0x1);

        /* Buffer Manager initialization */
        err = mvpp2_bm_init(dev, priv);
        if (err < 0)
                return err;

        /* Parser default initialization */
        err = mvpp2_prs_default_init(dev, priv);
        if (err < 0)
                return err;

        /* Classifier default initialization */
        mvpp2_cls_init(priv);

        return 0;
}

/* SMI / MDIO functions */

static int smi_wait_ready(struct mvpp2 *priv)
{
        u32 timeout = MVPP2_SMI_TIMEOUT;
        u32 smi_reg;

        /* wait till the SMI is not busy */
        do {
                /* read smi register */
                smi_reg = readl(priv->lms_base + MVPP2_SMI);
                if (timeout-- == 0) {
                        printf("Error: SMI busy timeout\n");
                        return -EFAULT;
                }
        } while (smi_reg & MVPP2_SMI_BUSY);

        return 0;
}

/*
 * mpp2_mdio_read - miiphy_read callback function.
 *
 * Returns 16bit phy register value, or 0xffff on error
 */
static int mpp2_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
{
        struct mvpp2 *priv = bus->priv;
        u32 smi_reg;
        u32 timeout;

        /* check parameters */
        if (addr > MVPP2_PHY_ADDR_MASK) {
                printf("Error: Invalid PHY address %d\n", addr);
                return -EFAULT;
        }

        if (reg > MVPP2_PHY_REG_MASK) {
                printf("Err: Invalid register offset %d\n", reg);
                return -EFAULT;
        }

        /* wait till the SMI is not busy */
        if (smi_wait_ready(priv) < 0)
                return -EFAULT;

        /* fill the phy address and regiser offset and read opcode */
        smi_reg = (addr << MVPP2_SMI_DEV_ADDR_OFFS)
                | (reg << MVPP2_SMI_REG_ADDR_OFFS)
                | MVPP2_SMI_OPCODE_READ;

        /* write the smi register */
        writel(smi_reg, priv->lms_base + MVPP2_SMI);

        /* wait till read value is ready */
        timeout = MVPP2_SMI_TIMEOUT;

        do {
                /* read smi register */
                smi_reg = readl(priv->lms_base + MVPP2_SMI);
                if (timeout-- == 0) {
                        printf("Err: SMI read ready timeout\n");
                        return -EFAULT;
                }
        } while (!(smi_reg & MVPP2_SMI_READ_VALID));

        /* Wait for the data to update in the SMI register */
        for (timeout = 0; timeout < MVPP2_SMI_TIMEOUT; timeout++)
                ;

        return readl(priv->lms_base + MVPP2_SMI) & MVPP2_SMI_DATA_MASK;
}

/*
 * mpp2_mdio_write - miiphy_write callback function.
 *
 * Returns 0 if write succeed, -EINVAL on bad parameters
 * -ETIME on timeout
 */
static int mpp2_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
                           u16 value)
{
        struct mvpp2 *priv = bus->priv;
        u32 smi_reg;

        /* check parameters */
        if (addr > MVPP2_PHY_ADDR_MASK) {
                printf("Error: Invalid PHY address %d\n", addr);
                return -EFAULT;
        }

        if (reg > MVPP2_PHY_REG_MASK) {
                printf("Err: Invalid register offset %d\n", reg);
                return -EFAULT;
        }

        /* wait till the SMI is not busy */
        if (smi_wait_ready(priv) < 0)
                return -EFAULT;

        /* fill the phy addr and reg offset and write opcode and data */
        smi_reg = value << MVPP2_SMI_DATA_OFFS;
        smi_reg |= (addr << MVPP2_SMI_DEV_ADDR_OFFS)
                | (reg << MVPP2_SMI_REG_ADDR_OFFS);
        smi_reg &= ~MVPP2_SMI_OPCODE_READ;

        /* write the smi register */
        writel(smi_reg, priv->lms_base + MVPP2_SMI);

        return 0;
}

static int mvpp2_recv(struct udevice *dev, int flags, uchar **packetp)
{
        struct mvpp2_port *port = dev_get_priv(dev);
        struct mvpp2_rx_desc *rx_desc;
        struct mvpp2_bm_pool *bm_pool;
        dma_addr_t dma_addr;
        u32 bm, rx_status;
        int pool, rx_bytes, err;
        int rx_received;
        struct mvpp2_rx_queue *rxq;
        u32 cause_rx_tx, cause_rx, cause_misc;
        u8 *data;

        cause_rx_tx = mvpp2_read(port->priv,
                                 MVPP2_ISR_RX_TX_CAUSE_REG(port->id));
        cause_rx_tx &= ~MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;
        cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK;
        if (!cause_rx_tx && !cause_misc)
                return 0;

        cause_rx = cause_rx_tx & MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK;

        /* Process RX packets */
        cause_rx |= port->pending_cause_rx;
        rxq = mvpp2_get_rx_queue(port, cause_rx);

        /* Get number of received packets and clamp the to-do */
        rx_received = mvpp2_rxq_received(port, rxq->id);

        /* Return if no packets are received */
        if (!rx_received)
                return 0;

        rx_desc = mvpp2_rxq_next_desc_get(rxq);
        rx_status = mvpp2_rxdesc_status_get(port, rx_desc);
        rx_bytes = mvpp2_rxdesc_size_get(port, rx_desc);
        rx_bytes -= MVPP2_MH_SIZE;
        dma_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc);

        bm = mvpp2_bm_cookie_build(port, rx_desc);
        pool = mvpp2_bm_cookie_pool_get(bm);
        bm_pool = &port->priv->bm_pools[pool];

        /* In case of an error, release the requested buffer pointer
         * to the Buffer Manager. This request process is controlled
         * by the hardware, and the information about the buffer is
         * comprised by the RX descriptor.
         */
        if (rx_status & MVPP2_RXD_ERR_SUMMARY) {
                mvpp2_rx_error(port, rx_desc);
                /* Return the buffer to the pool */
                mvpp2_pool_refill(port, bm, dma_addr, dma_addr);
                return 0;
        }

        err = mvpp2_rx_refill(port, bm_pool, bm, dma_addr);
        if (err) {
                netdev_err(port->dev, "failed to refill BM pools\n");
                return 0;
        }

        /* Update Rx queue management counters */
        mb();
        mvpp2_rxq_status_update(port, rxq->id, 1, 1);

        /* give packet to stack - skip on first n bytes */
        data = (u8 *)dma_addr + 2 + 32;

        if (rx_bytes <= 0)
                return 0;

        /*
         * No cache invalidation needed here, since the rx_buffer's are
         * located in a uncached memory region
         */
        *packetp = data;

        return rx_bytes;
}

/* Drain Txq */
static void mvpp2_txq_drain(struct mvpp2_port *port, struct mvpp2_tx_queue *txq,
                            int enable)
{
        u32 val;

        mvpp2_write(port->priv, MVPP2_TXQ_NUM_REG, txq->id);
        val = mvpp2_read(port->priv, MVPP2_TXQ_PREF_BUF_REG);
        if (enable)
                val |= MVPP2_TXQ_DRAIN_EN_MASK;
        else
                val &= ~MVPP2_TXQ_DRAIN_EN_MASK;
        mvpp2_write(port->priv, MVPP2_TXQ_PREF_BUF_REG, val);
}

static int mvpp2_send(struct udevice *dev, void *packet, int length)
{
        struct mvpp2_port *port = dev_get_priv(dev);
        struct mvpp2_tx_queue *txq, *aggr_txq;
        struct mvpp2_tx_desc *tx_desc;
        int tx_done;
        int timeout;

        txq = port->txqs[0];
        aggr_txq = &port->priv->aggr_txqs[smp_processor_id()];

        /* Get a descriptor for the first part of the packet */
        tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
        mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
        mvpp2_txdesc_size_set(port, tx_desc, length);
        mvpp2_txdesc_offset_set(port, tx_desc,
                                (dma_addr_t)packet & MVPP2_TX_DESC_ALIGN);
        mvpp2_txdesc_dma_addr_set(port, tx_desc,
                                  (dma_addr_t)packet & ~MVPP2_TX_DESC_ALIGN);
        /* First and Last descriptor */
        mvpp2_txdesc_cmd_set(port, tx_desc,
                             MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE
                             | MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC);

        /* Flush tx data */
        flush_dcache_range((unsigned long)packet,
                           (unsigned long)packet + ALIGN(length, PKTALIGN));

        /* Enable transmit */
        mb();
        mvpp2_aggr_txq_pend_desc_add(port, 1);

        mvpp2_write(port->priv, MVPP2_TXQ_NUM_REG, txq->id);

        timeout = 0;
        do {
                if (timeout++ > 10000) {
                        printf("timeout: packet not sent from aggregated to phys TXQ\n");
                        return 0;
                }
                tx_done = mvpp2_txq_pend_desc_num_get(port, txq);
        } while (tx_done);

        /* Enable TXQ drain */
        mvpp2_txq_drain(port, txq, 1);

        timeout = 0;
        do {
                if (timeout++ > 10000) {
                        printf("timeout: packet not sent\n");
                        return 0;
                }
                tx_done = mvpp2_txq_sent_desc_proc(port, txq);
        } while (!tx_done);

        /* Disable TXQ drain */
        mvpp2_txq_drain(port, txq, 0);

        return 0;
}

static int mvpp2_start(struct udevice *dev)
{
        struct eth_pdata *pdata = dev_get_platdata(dev);
        struct mvpp2_port *port = dev_get_priv(dev);

        /* Load current MAC address */
        memcpy(port->dev_addr, pdata->enetaddr, ETH_ALEN);

        /* Reconfigure parser accept the original MAC address */
        mvpp2_prs_update_mac_da(port, port->dev_addr);

        mvpp2_port_power_up(port);

        mvpp2_open(dev, port);

        return 0;
}

static void mvpp2_stop(struct udevice *dev)
{
        struct mvpp2_port *port = dev_get_priv(dev);

        mvpp2_stop_dev(port);
        mvpp2_cleanup_rxqs(port);
        mvpp2_cleanup_txqs(port);
}

static int mvpp2_probe(struct udevice *dev)
{
        struct mvpp2_port *port = dev_get_priv(dev);
        struct mvpp2 *priv = dev_get_priv(dev->parent);
        int err;

        /* Initialize network controller */
        err = mvpp2_init(dev, priv);
        if (err < 0) {
                dev_err(&pdev->dev, "failed to initialize controller\n");
                return err;
        }

        return mvpp2_port_probe(dev, port, dev_of_offset(dev), priv,
                                &buffer_loc.first_rxq);
}

static const struct eth_ops mvpp2_ops = {
        .start          = mvpp2_start,
        .send           = mvpp2_send,
        .recv           = mvpp2_recv,
        .stop           = mvpp2_stop,
};

static struct driver mvpp2_driver = {
        .name   = "mvpp2",
        .id     = UCLASS_ETH,
        .probe  = mvpp2_probe,
        .ops    = &mvpp2_ops,
        .priv_auto_alloc_size = sizeof(struct mvpp2_port),
        .platdata_auto_alloc_size = sizeof(struct eth_pdata),
};

/*
 * Use a MISC device to bind the n instances (child nodes) of the
 * network base controller in UCLASS_ETH.
 */
static int mvpp2_base_probe(struct udevice *dev)
{
        struct mvpp2 *priv = dev_get_priv(dev);
        struct mii_dev *bus;
        void *bd_space;
        u32 size = 0;
        int i;

        /* Save hw-version */
        priv->hw_version = dev_get_driver_data(dev);

        /*
         * U-Boot special buffer handling:
         *
         * Allocate buffer area for descs and rx_buffers. This is only
         * done once for all interfaces. As only one interface can
         * be active. Make this area DMA-safe by disabling the D-cache
         */

        /* Align buffer area for descs and rx_buffers to 1MiB */
        bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE);
        mmu_set_region_dcache_behaviour((unsigned long)bd_space,
                                        BD_SPACE, DCACHE_OFF);

        buffer_loc.aggr_tx_descs = (struct mvpp2_tx_desc *)bd_space;
        size += MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE;

        buffer_loc.tx_descs =
                (struct mvpp2_tx_desc *)((unsigned long)bd_space + size);
        size += MVPP2_MAX_TXD * MVPP2_DESC_ALIGNED_SIZE;

        buffer_loc.rx_descs =
                (struct mvpp2_rx_desc *)((unsigned long)bd_space + size);
        size += MVPP2_MAX_RXD * MVPP2_DESC_ALIGNED_SIZE;

        for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) {
                buffer_loc.bm_pool[i] =
                        (unsigned long *)((unsigned long)bd_space + size);
                size += MVPP2_BM_POOL_SIZE_MAX * sizeof(u32);
        }

        for (i = 0; i < MVPP2_BM_LONG_BUF_NUM; i++) {
                buffer_loc.rx_buffer[i] =
                        (unsigned long *)((unsigned long)bd_space + size);
                size += RX_BUFFER_SIZE;
        }

        /* Save base addresses for later use */
        priv->base = (void *)dev_get_addr_index(dev, 0);
        if (IS_ERR(priv->base))
                return PTR_ERR(priv->base);

        priv->lms_base = (void *)dev_get_addr_index(dev, 1);
        if (IS_ERR(priv->lms_base))
                return PTR_ERR(priv->lms_base);

        /* Finally create and register the MDIO bus driver */
        bus = mdio_alloc();
        if (!bus) {
                printf("Failed to allocate MDIO bus\n");
                return -ENOMEM;
        }

        bus->read = mpp2_mdio_read;
        bus->write = mpp2_mdio_write;
        snprintf(bus->name, sizeof(bus->name), dev->name);
        bus->priv = (void *)priv;
        priv->bus = bus;

        return mdio_register(bus);
}

static int mvpp2_base_bind(struct udevice *parent)
{
        const void *blob = gd->fdt_blob;
        int node = dev_of_offset(parent);
        struct uclass_driver *drv;
        struct udevice *dev;
        struct eth_pdata *plat;
        char *name;
        int subnode;
        u32 id;

        /* Lookup eth driver */
        drv = lists_uclass_lookup(UCLASS_ETH);
        if (!drv) {
                puts("Cannot find eth driver\n");
                return -ENOENT;
        }

        fdt_for_each_subnode(subnode, blob, node) {
                /* Skip disabled ports */
                if (!fdtdec_get_is_enabled(blob, subnode))
                        continue;

                plat = calloc(1, sizeof(*plat));
                if (!plat)
                        return -ENOMEM;

                id = fdtdec_get_int(blob, subnode, "port-id", -1);

                name = calloc(1, 16);
                sprintf(name, "mvpp2-%d", id);

                /* Create child device UCLASS_ETH and bind it */
                device_bind(parent, &mvpp2_driver, name, plat, subnode, &dev);
                dev_set_of_offset(dev, subnode);
        }

        return 0;
}

static const struct udevice_id mvpp2_ids[] = {
        {
                .compatible = "marvell,armada-375-pp2",
                .data = MVPP21,
        },
        { }
};

U_BOOT_DRIVER(mvpp2_base) = {
        .name   = "mvpp2_base",
        .id     = UCLASS_MISC,
        .of_match = mvpp2_ids,
        .bind   = mvpp2_base_bind,
        .probe  = mvpp2_base_probe,
        .priv_auto_alloc_size = sizeof(struct mvpp2),
};