[linux.git] / drivers / net / ethernet / marvell / mvpp2.c

/*
 * Driver for Marvell PPv2 network controller for Armada 375 SoC.
 *
 * Copyright (C) 2014 Marvell
 *
 * Marcin Wojtas <mw@semihalf.com>
 *
 * 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 <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/skbuff.h>
#include <linux/inetdevice.h>
#include <linux/mbus.h>
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/interrupt.h>
#include <linux/cpumask.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/phy.h>
#include <linux/phy/phy.h>
#include <linux/clk.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>
#include <linux/regmap.h>
#include <uapi/linux/ppp_defs.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/tso.h>

/* 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
#define MVPP22_TX_FIFO_SIZE_REG(port)           (0x8860 + 4 * (port))

/* 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     MVPP21_RXQ_POOL_SHORT_MASK          0x700000
#define     MVPP22_RXQ_POOL_SHORT_MASK          0xf00000
#define     MVPP2_RXQ_POOL_LONG_OFFS            24
#define     MVPP21_RXQ_POOL_LONG_MASK           0x7000000
#define     MVPP22_RXQ_POOL_LONG_MASK           0xf000000
#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)

/* RSS Registers */
#define MVPP22_RSS_INDEX                        0x1500
#define     MVPP22_RSS_INDEX_TABLE_ENTRY(idx)   (idx)
#define     MVPP22_RSS_INDEX_TABLE(idx)         ((idx) << 8)
#define     MVPP22_RSS_INDEX_QUEUE(idx)         ((idx) << 16)
#define MVPP22_RSS_TABLE_ENTRY                  0x1508
#define MVPP22_RSS_TABLE                        0x1510
#define     MVPP22_RSS_TABLE_POINTER(p)         (p)
#define MVPP22_RSS_WIDTH                        0x150c

/* 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     MVPP22_DESC_ADDR_OFFS               8
#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_TXQ_THRESH_REG                    0x2094
#define     MVPP2_TXQ_THRESH_OFFSET             16
#define     MVPP2_TXQ_THRESH_MASK               0x3fff
#define MVPP2_AGGR_TXQ_UPDATE_REG               0x2090
#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     MVPP22_AGGR_TXQ_DESC_ADDR_OFFS      8
#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

/* AXI Bridge Registers */
#define MVPP22_AXI_BM_WR_ATTR_REG               0x4100
#define MVPP22_AXI_BM_RD_ATTR_REG               0x4104
#define MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG      0x4110
#define MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG        0x4114
#define MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG        0x4118
#define MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG        0x411c
#define MVPP22_AXI_RX_DATA_WR_ATTR_REG          0x4120
#define MVPP22_AXI_TX_DATA_RD_ATTR_REG          0x4130
#define MVPP22_AXI_RD_NORMAL_CODE_REG           0x4150
#define MVPP22_AXI_RD_SNOOP_CODE_REG            0x4154
#define MVPP22_AXI_WR_NORMAL_CODE_REG           0x4160
#define MVPP22_AXI_WR_SNOOP_CODE_REG            0x4164

/* Values for AXI Bridge registers */
#define MVPP22_AXI_ATTR_CACHE_OFFS              0
#define MVPP22_AXI_ATTR_DOMAIN_OFFS             12

#define MVPP22_AXI_CODE_CACHE_OFFS              0
#define MVPP22_AXI_CODE_DOMAIN_OFFS             4

#define MVPP22_AXI_CODE_CACHE_NON_CACHE         0x3
#define MVPP22_AXI_CODE_CACHE_WR_CACHE          0x7
#define MVPP22_AXI_CODE_CACHE_RD_CACHE          0xb

#define MVPP22_AXI_CODE_DOMAIN_OUTER_DOM        2
#define MVPP22_AXI_CODE_DOMAIN_SYSTEM           3

/* Interrupt Cause and Mask registers */
#define MVPP2_ISR_TX_THRESHOLD_REG(port)        (0x5140 + 4 * (port))
#define     MVPP2_MAX_ISR_TX_THRESHOLD          0xfffff0

#define MVPP2_ISR_RX_THRESHOLD_REG(rxq)         (0x5200 + 4 * (rxq))
#define     MVPP2_MAX_ISR_RX_THRESHOLD          0xfffff0
#define MVPP21_ISR_RXQ_GROUP_REG(port)          (0x5400 + 4 * (port))

#define MVPP22_ISR_RXQ_GROUP_INDEX_REG          0x5400
#define MVPP22_ISR_RXQ_GROUP_INDEX_SUBGROUP_MASK 0xf
#define MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_MASK   0x380
#define MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET 7

#define MVPP22_ISR_RXQ_GROUP_INDEX_SUBGROUP_MASK 0xf
#define MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_MASK   0x380

#define MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG     0x5404
#define MVPP22_ISR_RXQ_SUB_GROUP_STARTQ_MASK    0x1f
#define MVPP22_ISR_RXQ_SUB_GROUP_SIZE_MASK      0xf00
#define MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET    8

#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_TXQ_OCCUP_DESC_ALL_OFFSET       16
#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 MVPP22_BM_ADDR_HIGH_ALLOC               0x6444
#define     MVPP22_BM_ADDR_HIGH_PHYS_MASK       0xff
#define     MVPP22_BM_ADDR_HIGH_VIRT_MASK       0xff00
#define     MVPP22_BM_ADDR_HIGH_VIRT_SHIFT      8
#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 MVPP22_BM_ADDR_HIGH_RLS_REG             0x64c4
#define     MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK   0xff
#define     MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK   0xff00
#define     MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT  8

/* 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_PORT_TYPE_MASK           BIT(1)
#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_FLOW_CTRL_MASK           GENMASK(2, 1)
#define     MVPP2_GMAC_PCS_ENABLE_MASK          BIT(3)
#define     MVPP2_GMAC_INTERNAL_CLK_MASK        BIT(4)
#define     MVPP2_GMAC_DISABLE_PADDING          BIT(5)
#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_IN_BAND_AUTONEG          BIT(2)
#define     MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS   BIT(3)
#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_FLOW_CTRL_AUTONEG        BIT(11)
#define     MVPP2_GMAC_CONFIG_FULL_DUPLEX       BIT(12)
#define     MVPP2_GMAC_AN_DUPLEX_EN             BIT(13)
#define MVPP2_GMAC_STATUS0                      0x10
#define     MVPP2_GMAC_STATUS0_LINK_UP          BIT(0)
#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 MVPP22_GMAC_INT_STAT                    0x20
#define     MVPP22_GMAC_INT_STAT_LINK           BIT(1)
#define MVPP22_GMAC_INT_MASK                    0x24
#define     MVPP22_GMAC_INT_MASK_LINK_STAT      BIT(1)
#define MVPP22_GMAC_CTRL_4_REG                  0x90
#define     MVPP22_CTRL4_EXT_PIN_GMII_SEL       BIT(0)
#define     MVPP22_CTRL4_DP_CLK_SEL             BIT(5)
#define     MVPP22_CTRL4_SYNC_BYPASS_DIS        BIT(6)
#define     MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE   BIT(7)
#define MVPP22_GMAC_INT_SUM_MASK                0xa4
#define     MVPP22_GMAC_INT_SUM_MASK_LINK_STAT  BIT(1)

/* Per-port XGMAC registers. PPv2.2 only, only for GOP port 0,
 * relative to port->base.
 */
#define MVPP22_XLG_CTRL0_REG                    0x100
#define     MVPP22_XLG_CTRL0_PORT_EN            BIT(0)
#define     MVPP22_XLG_CTRL0_MAC_RESET_DIS      BIT(1)
#define     MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN    BIT(7)
#define     MVPP22_XLG_CTRL0_MIB_CNT_DIS        BIT(14)
#define MVPP22_XLG_CTRL1_REG                    0x104
#define     MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS        0
#define     MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK        0x1fff
#define MVPP22_XLG_STATUS                       0x10c
#define     MVPP22_XLG_STATUS_LINK_UP           BIT(0)
#define MVPP22_XLG_INT_STAT                     0x114
#define     MVPP22_XLG_INT_STAT_LINK            BIT(1)
#define MVPP22_XLG_INT_MASK                     0x118
#define     MVPP22_XLG_INT_MASK_LINK            BIT(1)
#define MVPP22_XLG_CTRL3_REG                    0x11c
#define     MVPP22_XLG_CTRL3_MACMODESELECT_MASK (7 << 13)
#define     MVPP22_XLG_CTRL3_MACMODESELECT_GMAC (0 << 13)
#define     MVPP22_XLG_CTRL3_MACMODESELECT_10G  (1 << 13)
#define MVPP22_XLG_EXT_INT_MASK                 0x15c
#define     MVPP22_XLG_EXT_INT_MASK_XLG         BIT(1)
#define     MVPP22_XLG_EXT_INT_MASK_GIG         BIT(2)
#define MVPP22_XLG_CTRL4_REG                    0x184
#define     MVPP22_XLG_CTRL4_FWD_FC             BIT(5)
#define     MVPP22_XLG_CTRL4_FWD_PFC            BIT(6)
#define     MVPP22_XLG_CTRL4_MACMODSELECT_GMAC  BIT(12)

/* SMI registers. PPv2.2 only, relative to priv->iface_base. */
#define MVPP22_SMI_MISC_CFG_REG                 0x1204
#define     MVPP22_SMI_POLLING_EN               BIT(10)

#define MVPP22_GMAC_BASE(port)          (0x7000 + (port) * 0x1000 + 0xe00)

#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)

/* XPCS registers. PPv2.2 only */
#define MVPP22_MPCS_BASE(port)                  (0x7000 + (port) * 0x1000)
#define MVPP22_MPCS_CTRL                        0x14
#define     MVPP22_MPCS_CTRL_FWD_ERR_CONN       BIT(10)
#define MVPP22_MPCS_CLK_RESET                   0x14c
#define     MAC_CLK_RESET_SD_TX                 BIT(0)
#define     MAC_CLK_RESET_SD_RX                 BIT(1)
#define     MAC_CLK_RESET_MAC                   BIT(2)
#define     MVPP22_MPCS_CLK_RESET_DIV_RATIO(n)  ((n) << 4)
#define     MVPP22_MPCS_CLK_RESET_DIV_SET       BIT(11)

/* XPCS registers. PPv2.2 only */
#define MVPP22_XPCS_BASE(port)                  (0x7400 + (port) * 0x1000)
#define MVPP22_XPCS_CFG0                        0x0
#define     MVPP22_XPCS_CFG0_PCS_MODE(n)        ((n) << 3)
#define     MVPP22_XPCS_CFG0_ACTIVE_LANE(n)     ((n) << 5)

/* System controller registers. Accessed through a regmap. */
#define GENCONF_SOFT_RESET1                             0x1108
#define     GENCONF_SOFT_RESET1_GOP                     BIT(6)
#define GENCONF_PORT_CTRL0                              0x1110
#define     GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT         BIT(1)
#define     GENCONF_PORT_CTRL0_RX_DATA_SAMPLE           BIT(29)
#define     GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR        BIT(31)
#define GENCONF_PORT_CTRL1                              0x1114
#define     GENCONF_PORT_CTRL1_EN(p)                    BIT(p)
#define     GENCONF_PORT_CTRL1_RESET(p)                 (BIT(p) << 28)
#define GENCONF_CTRL0                                   0x1120
#define     GENCONF_CTRL0_PORT0_RGMII                   BIT(0)
#define     GENCONF_CTRL0_PORT1_RGMII_MII               BIT(1)
#define     GENCONF_CTRL0_PORT1_RGMII                   BIT(2)

/* Various constants */

/* Coalescing */
#define MVPP2_TXDONE_COAL_PKTS_THRESH   64
#define MVPP2_TXDONE_HRTIMER_PERIOD_NS  1000000UL
#define MVPP2_TXDONE_COAL_USEC          1000
#define MVPP2_RX_COAL_PKTS              32
#define MVPP2_RX_COAL_USEC              64

/* 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_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

/* MVPP2_MAX_TSO_SEGS is the maximum number of fragments to allow in the GSO
 * skb. As we need a maxium of two descriptors per fragments (1 header, 1 data),
 * multiply this value by two to count the maximum number of skb descs needed.
 */
#define MVPP2_MAX_TSO_SEGS              300
#define MVPP2_MAX_SKB_DESCS             (MVPP2_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS)

/* Dfault number of RXQs in use */
#define MVPP2_DEFAULT_RXQ               4

/* Max number of Rx descriptors */
#define MVPP2_MAX_RXD_MAX               1024
#define MVPP2_MAX_RXD_DFLT              128

/* Max number of Tx descriptors */
#define MVPP2_MAX_TXD_MAX               2048
#define MVPP2_MAX_TXD_DFLT              1024

/* 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_32KB       0x8000
#define MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB        0x2000
#define MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB        0x1000
#define MVPP2_RX_FIFO_PORT_ATTR_SIZE_32KB       0x200
#define MVPP2_RX_FIFO_PORT_ATTR_SIZE_8KB        0x80
#define MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB        0x40
#define MVPP2_RX_FIFO_PORT_MIN_PKT              0x80

/* TX FIFO constants */
#define MVPP22_TX_FIFO_DATA_SIZE_10KB           0xa
#define MVPP22_TX_FIFO_DATA_SIZE_3KB            0x3

/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
        SKB_DATA_ALIGN(sizeof(struct skb_shared_info))

#define MVPP2_RX_PKT_SIZE(mtu) \
        ALIGN((mtu) + MVPP2_MH_SIZE + MVPP2_VLAN_TAG_LEN + \
              ETH_HLEN + ETH_FCS_LEN, 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_IP_FRAG_TRUE               BIT(17)
#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
#define MVPP2_CLS_RX_QUEUES             256

/* RSS constants */
#define MVPP22_RSS_TABLE_ENTRIES        32

/* BM constants */
#define MVPP2_BM_POOLS_NUM              8
#define MVPP2_BM_LONG_BUF_NUM           1024
#define MVPP2_BM_SHORT_BUF_NUM          2048
#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)    ((port > 2) ? 2 : port)
#define MVPP2_BM_SWF_SHORT_POOL         3

/* 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)

#define MVPP21_ADDR_SPACE_SZ            0
#define MVPP22_ADDR_SPACE_SZ            SZ_64K

#define MVPP2_MAX_THREADS               8
#define MVPP2_MAX_QVECS                 MVPP2_MAX_THREADS

enum mvpp2_bm_type {
        MVPP2_BM_FREE,
        MVPP2_BM_SWF_LONG,
        MVPP2_BM_SWF_SHORT
};

/* GMAC MIB Counters register definitions */
#define MVPP21_MIB_COUNTERS_OFFSET              0x1000
#define MVPP21_MIB_COUNTERS_PORT_SZ             0x400
#define MVPP22_MIB_COUNTERS_OFFSET              0x0
#define MVPP22_MIB_COUNTERS_PORT_SZ             0x100

#define MVPP2_MIB_GOOD_OCTETS_RCVD              0x0
#define MVPP2_MIB_BAD_OCTETS_RCVD               0x8
#define MVPP2_MIB_CRC_ERRORS_SENT               0xc
#define MVPP2_MIB_UNICAST_FRAMES_RCVD           0x10
#define MVPP2_MIB_BROADCAST_FRAMES_RCVD         0x18
#define MVPP2_MIB_MULTICAST_FRAMES_RCVD         0x1c
#define MVPP2_MIB_FRAMES_64_OCTETS              0x20
#define MVPP2_MIB_FRAMES_65_TO_127_OCTETS       0x24
#define MVPP2_MIB_FRAMES_128_TO_255_OCTETS      0x28
#define MVPP2_MIB_FRAMES_256_TO_511_OCTETS      0x2c
#define MVPP2_MIB_FRAMES_512_TO_1023_OCTETS     0x30
#define MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS     0x34
#define MVPP2_MIB_GOOD_OCTETS_SENT              0x38
#define MVPP2_MIB_UNICAST_FRAMES_SENT           0x40
#define MVPP2_MIB_MULTICAST_FRAMES_SENT         0x48
#define MVPP2_MIB_BROADCAST_FRAMES_SENT         0x4c
#define MVPP2_MIB_FC_SENT                       0x54
#define MVPP2_MIB_FC_RCVD                       0x58
#define MVPP2_MIB_RX_FIFO_OVERRUN               0x5c
#define MVPP2_MIB_UNDERSIZE_RCVD                0x60
#define MVPP2_MIB_FRAGMENTS_RCVD                0x64
#define MVPP2_MIB_OVERSIZE_RCVD                 0x68
#define MVPP2_MIB_JABBER_RCVD                   0x6c
#define MVPP2_MIB_MAC_RCV_ERROR                 0x70
#define MVPP2_MIB_BAD_CRC_EVENT                 0x74
#define MVPP2_MIB_COLLISION                     0x78
#define MVPP2_MIB_LATE_COLLISION                0x7c

#define MVPP2_MIB_COUNTERS_STATS_DELAY          (1 * HZ)

/* Definitions */

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

        /* On PPv2.2, each "software thread" can access the base
         * register through a separate address space, each 64 KB apart
         * from each other. Typically, such address spaces will be
         * used per CPU.
         */
        void __iomem *swth_base[MVPP2_MAX_THREADS];

        /* On PPv2.2, some port control registers are located into the system
         * controller space. These registers are accessible through a regmap.
         */
        struct regmap *sysctrl_base;

        /* Common clocks */
        struct clk *pp_clk;
        struct clk *gop_clk;
        struct clk *mg_clk;
        struct clk *axi_clk;

        /* List of pointers to port structures */
        int port_count;
        struct mvpp2_port *port_list[MVPP2_MAX_PORTS];

        /* 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;

        /* Maximum number of RXQs per port */
        unsigned int max_port_rxqs;

        /* Workqueue to gather hardware statistics */
        char queue_name[30];
        struct workqueue_struct *stats_queue;
};

struct mvpp2_pcpu_stats {
        struct  u64_stats_sync syncp;
        u64     rx_packets;
        u64     rx_bytes;
        u64     tx_packets;
        u64     tx_bytes;
};

/* Per-CPU port control */
struct mvpp2_port_pcpu {
        struct hrtimer tx_done_timer;
        bool timer_scheduled;
        /* Tasklet for egress finalization */
        struct tasklet_struct tx_done_tasklet;
};

struct mvpp2_queue_vector {
        int irq;
        struct napi_struct napi;
        enum { MVPP2_QUEUE_VECTOR_SHARED, MVPP2_QUEUE_VECTOR_PRIVATE } type;
        int sw_thread_id;
        u16 sw_thread_mask;
        int first_rxq;
        int nrxqs;
        u32 pending_cause_rx;
        struct mvpp2_port *port;
};

struct mvpp2_port {
        u8 id;

        /* Index of the port from the "group of ports" complex point
         * of view
         */
        int gop_id;

        int link_irq;

        struct mvpp2 *priv;

        /* Firmware node associated to the port */
        struct fwnode_handle *fwnode;

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

        struct mvpp2_rx_queue **rxqs;
        unsigned int nrxqs;
        struct mvpp2_tx_queue **txqs;
        unsigned int ntxqs;
        struct net_device *dev;

        int pkt_size;

        /* 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;
        u64 *ethtool_stats;

        /* Per-port work and its lock to gather hardware statistics */
        struct mutex gather_stats_lock;
        struct delayed_work stats_work;

        phy_interface_t phy_interface;
        struct device_node *phy_node;
        struct phy *comphy;
        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;

        struct mvpp2_queue_vector qvecs[MVPP2_MAX_QVECS];
        unsigned int nqvecs;
        bool has_tx_irqs;

        u32 tx_time_coal;
};

/* 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)

/* HW TX descriptor for PPv2.1 */
struct mvpp21_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)            */
};

/* HW RX descriptor for PPv2.1 */
struct mvpp21_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;
};

/* HW TX descriptor for PPv2.2 */
struct mvpp22_tx_desc {
        u32 command;
        u8  packet_offset;
        u8  phys_txq;
        u16 data_size;
        u64 reserved1;
        u64 buf_dma_addr_ptp;
        u64 buf_cookie_misc;
};

/* HW RX descriptor for PPv2.2 */
struct mvpp22_rx_desc {
        u32 status;
        u16 reserved1;
        u16 data_size;
        u32 reserved2;
        u32 reserved3;
        u64 buf_dma_addr_key_hash;
        u64 buf_cookie_misc;
};

/* Opaque type used by the driver to manipulate the HW TX and RX
 * descriptors
 */
struct mvpp2_tx_desc {
        union {
                struct mvpp21_tx_desc pp21;
                struct mvpp22_tx_desc pp22;
        };
};

struct mvpp2_rx_desc {
        union {
                struct mvpp21_rx_desc pp21;
                struct mvpp22_rx_desc pp22;
        };
};

struct mvpp2_txq_pcpu_buf {
        /* Transmitted SKB */
        struct sk_buff *skb;

        /* Physical address of transmitted buffer */
        dma_addr_t dma;

        /* Size transmitted */
        size_t size;
};

/* 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;

        int wake_threshold;
        int stop_threshold;

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

        /* Infos about transmitted buffers */
        struct mvpp2_txq_pcpu_buf *buffs;

        /* 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;

        /* DMA buffer for TSO headers */
        char *tso_headers;
        dma_addr_t tso_headers_dma;
};

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;
        /* BPPE size in bytes */
        int size_bytes;
        /* Number of buffers for this pool */
        int buf_num;
        /* Pool buffer size */
        int buf_size;
        /* Packet size */
        int pkt_size;
        int frag_size;

        /* BPPE virtual base address */
        u32 *virt_addr;
        /* BPPE DMA base address */
        dma_addr_t dma_addr;

        /* Ports using BM pool */
        u32 port_map;
};

#define IS_TSO_HEADER(txq_pcpu, addr) \
        ((addr) >= (txq_pcpu)->tso_headers_dma && \
         (addr) < (txq_pcpu)->tso_headers_dma + \
         (txq_pcpu)->size * TSO_HEADER_SIZE)

/* Queue modes */
#define MVPP2_QDIST_SINGLE_MODE 0
#define MVPP2_QDIST_MULTI_MODE  1

static int queue_mode = MVPP2_QDIST_SINGLE_MODE;

module_param(queue_mode, int, 0444);
MODULE_PARM_DESC(queue_mode, "Set queue_mode (single=0, multi=1)");

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

/* Utility/helper methods */

static void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data)
{
        writel(data, priv->swth_base[0] + offset);
}

static u32 mvpp2_read(struct mvpp2 *priv, u32 offset)
{
        return readl(priv->swth_base[0] + offset);
}

/* These accessors should be used to access:
 *
 * - per-CPU registers, where each CPU has its own copy of the
 *   register.
 *
 *   MVPP2_BM_VIRT_ALLOC_REG
 *   MVPP2_BM_ADDR_HIGH_ALLOC
 *   MVPP22_BM_ADDR_HIGH_RLS_REG
 *   MVPP2_BM_VIRT_RLS_REG
 *   MVPP2_ISR_RX_TX_CAUSE_REG
 *   MVPP2_ISR_RX_TX_MASK_REG
 *   MVPP2_TXQ_NUM_REG
 *   MVPP2_AGGR_TXQ_UPDATE_REG
 *   MVPP2_TXQ_RSVD_REQ_REG
 *   MVPP2_TXQ_RSVD_RSLT_REG
 *   MVPP2_TXQ_SENT_REG
 *   MVPP2_RXQ_NUM_REG
 *
 * - global registers that must be accessed through a specific CPU
 *   window, because they are related to an access to a per-CPU
 *   register
 *
 *   MVPP2_BM_PHY_ALLOC_REG    (related to MVPP2_BM_VIRT_ALLOC_REG)
 *   MVPP2_BM_PHY_RLS_REG      (related to MVPP2_BM_VIRT_RLS_REG)
 *   MVPP2_RXQ_THRESH_REG      (related to MVPP2_RXQ_NUM_REG)
 *   MVPP2_RXQ_DESC_ADDR_REG   (related to MVPP2_RXQ_NUM_REG)
 *   MVPP2_RXQ_DESC_SIZE_REG   (related to MVPP2_RXQ_NUM_REG)
 *   MVPP2_RXQ_INDEX_REG       (related to MVPP2_RXQ_NUM_REG)
 *   MVPP2_TXQ_PENDING_REG     (related to MVPP2_TXQ_NUM_REG)
 *   MVPP2_TXQ_DESC_ADDR_REG   (related to MVPP2_TXQ_NUM_REG)
 *   MVPP2_TXQ_DESC_SIZE_REG   (related to MVPP2_TXQ_NUM_REG)
 *   MVPP2_TXQ_INDEX_REG       (related to MVPP2_TXQ_NUM_REG)
 *   MVPP2_TXQ_PENDING_REG     (related to MVPP2_TXQ_NUM_REG)
 *   MVPP2_TXQ_PREF_BUF_REG    (related to MVPP2_TXQ_NUM_REG)
 *   MVPP2_TXQ_PREF_BUF_REG    (related to MVPP2_TXQ_NUM_REG)
 */
static void mvpp2_percpu_write(struct mvpp2 *priv, int cpu,
                               u32 offset, u32 data)
{
        writel(data, priv->swth_base[cpu] + offset);
}

static u32 mvpp2_percpu_read(struct mvpp2 *priv, int cpu,
                             u32 offset)
{
        return readl(priv->swth_base[cpu] + offset);
}

static dma_addr_t mvpp2_txdesc_dma_addr_get(struct mvpp2_port *port,
                                            struct mvpp2_tx_desc *tx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return tx_desc->pp21.buf_dma_addr;
        else
                return tx_desc->pp22.buf_dma_addr_ptp & GENMASK_ULL(40, 0);
}

static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port,
                                      struct mvpp2_tx_desc *tx_desc,
                                      dma_addr_t dma_addr)
{
        dma_addr_t addr, offset;

        addr = dma_addr & ~MVPP2_TX_DESC_ALIGN;
        offset = dma_addr & MVPP2_TX_DESC_ALIGN;

        if (port->priv->hw_version == MVPP21) {
                tx_desc->pp21.buf_dma_addr = addr;
                tx_desc->pp21.packet_offset = offset;
        } else {
                u64 val = (u64)addr;

                tx_desc->pp22.buf_dma_addr_ptp &= ~GENMASK_ULL(40, 0);
                tx_desc->pp22.buf_dma_addr_ptp |= val;
                tx_desc->pp22.packet_offset = offset;
        }
}

static size_t mvpp2_txdesc_size_get(struct mvpp2_port *port,
                                    struct mvpp2_tx_desc *tx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return tx_desc->pp21.data_size;
        else
                return tx_desc->pp22.data_size;
}

static void mvpp2_txdesc_size_set(struct mvpp2_port *port,
                                  struct mvpp2_tx_desc *tx_desc,
                                  size_t size)
{
        if (port->priv->hw_version == MVPP21)
                tx_desc->pp21.data_size = size;
        else
                tx_desc->pp22.data_size = size;
}

static void mvpp2_txdesc_txq_set(struct mvpp2_port *port,
                                 struct mvpp2_tx_desc *tx_desc,
                                 unsigned int txq)
{
        if (port->priv->hw_version == MVPP21)
                tx_desc->pp21.phys_txq = txq;
        else
                tx_desc->pp22.phys_txq = txq;
}

static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port,
                                 struct mvpp2_tx_desc *tx_desc,
                                 unsigned int command)
{
        if (port->priv->hw_version == MVPP21)
                tx_desc->pp21.command = command;
        else
                tx_desc->pp22.command = command;
}

static unsigned int mvpp2_txdesc_offset_get(struct mvpp2_port *port,
                                            struct mvpp2_tx_desc *tx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return tx_desc->pp21.packet_offset;
        else
                return tx_desc->pp22.packet_offset;
}

static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port,
                                            struct mvpp2_rx_desc *rx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return rx_desc->pp21.buf_dma_addr;
        else
                return rx_desc->pp22.buf_dma_addr_key_hash & GENMASK_ULL(40, 0);
}

static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port,
                                             struct mvpp2_rx_desc *rx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return rx_desc->pp21.buf_cookie;
        else
                return rx_desc->pp22.buf_cookie_misc & GENMASK_ULL(40, 0);
}

static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port,
                                    struct mvpp2_rx_desc *rx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return rx_desc->pp21.data_size;
        else
                return rx_desc->pp22.data_size;
}

static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port,
                                   struct mvpp2_rx_desc *rx_desc)
{
        if (port->priv->hw_version == MVPP21)
                return rx_desc->pp21.status;
        else
                return rx_desc->pp22.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;
}

static void mvpp2_txq_inc_put(struct mvpp2_port *port,
                              struct mvpp2_txq_pcpu *txq_pcpu,
                              struct sk_buff *skb,
                              struct mvpp2_tx_desc *tx_desc)
{
        struct mvpp2_txq_pcpu_buf *tx_buf =
                txq_pcpu->buffs + txq_pcpu->txq_put_index;
        tx_buf->skb = skb;
        tx_buf->size = mvpp2_txdesc_size_get(port, tx_desc);
        tx_buf->dma = mvpp2_txdesc_dma_addr_get(port, tx_desc) +
                mvpp2_txdesc_offset_get(port, tx_desc);
        txq_pcpu->txq_put_index++;
        if (txq_pcpu->txq_put_index == txq_pcpu->size)
                txq_pcpu->txq_put_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)];
}

/* Compare tcam data bytes with a pattern */
static bool mvpp2_prs_tcam_data_cmp(struct mvpp2_prs_entry *pe, int offs,
                                    u16 data)
{
        int off = MVPP2_PRS_TCAM_DATA_BYTE(offs);
        u16 tcam_data;

        tcam_data = (pe->tcam.byte[off + 1] << 8) | pe->tcam.byte[off];
        if (tcam_data != data)
                return false;
        return true;
}

/* Update ai bits in tcam sw entry */
static void mvpp2_prs_tcam_ai_update(struct mvpp2_prs_entry *pe,
                                     unsigned int bits, unsigned int enable)
{
        int i, ai_idx = MVPP2_PRS_TCAM_AI_BYTE;

        for (i = 0; i < MVPP2_PRS_AI_BITS; i++) {

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

                if (bits & BIT(i))
                        pe->tcam.byte[ai_idx] |= 1 << i;
                else
                        pe->tcam.byte[ai_idx] &= ~(1 << i);
        }

        pe->tcam.byte[MVPP2_PRS_TCAM_EN_OFFS(ai_idx)] |= enable;
}

/* Get ai bits from tcam sw entry */
static int mvpp2_prs_tcam_ai_get(struct mvpp2_prs_entry *pe)
{
        return pe->tcam.byte[MVPP2_PRS_TCAM_AI_BYTE];
}

/* 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);
        }
}

/* Obtain ri bits from sram sw entry */
static int mvpp2_prs_sram_ri_get(struct mvpp2_prs_entry *pe)
{
        return pe->sram.word[MVPP2_PRS_SRAM_RI_WORD];
}

/* 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(pe));
                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(pe));
                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(pe));
                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);
}

/* Set entry for dsa packets */
static void mvpp2_prs_dsa_tag_set(struct mvpp2 *priv, int port, bool add,
                                  bool tagged, bool extend)
{
        struct mvpp2_prs_entry pe;
        int tid, shift;

        if (extend) {
                tid = tagged ? MVPP2_PE_EDSA_TAGGED : MVPP2_PE_EDSA_UNTAGGED;
                shift = 8;
        } else {
                tid = tagged ? MVPP2_PE_DSA_TAGGED : MVPP2_PE_DSA_UNTAGGED;
                shift = 4;
        }

        if (priv->prs_shadow[tid].valid) {
                /* Entry exist - update port only */
                pe.index = tid;
                mvpp2_prs_hw_read(priv, &pe);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_DSA);
                pe.index = tid;

                /* Shift 4 bytes if DSA tag or 8 bytes in case of EDSA tag*/
                mvpp2_prs_sram_shift_set(&pe, shift,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

                /* Update shadow table */
                mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_DSA);

                if (tagged) {
                        /* Set tagged bit in DSA tag */
                        mvpp2_prs_tcam_data_byte_set(&pe, 0,
                                                     MVPP2_PRS_TCAM_DSA_TAGGED_BIT,
                                                     MVPP2_PRS_TCAM_DSA_TAGGED_BIT);
                        /* Clear all ai bits for next iteration */
                        mvpp2_prs_sram_ai_update(&pe, 0,
                                                 MVPP2_PRS_SRAM_AI_MASK);
                        /* If packet is tagged continue check vlans */
                        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VLAN);
                } else {
                        /* Set result info bits to 'no vlans' */
                        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_VLAN_NONE,
                                                 MVPP2_PRS_RI_VLAN_MASK);
                        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);
                }

                /* 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 entry for dsa ethertype */
static void mvpp2_prs_dsa_tag_ethertype_set(struct mvpp2 *priv, int port,
                                            bool add, bool tagged, bool extend)
{
        struct mvpp2_prs_entry pe;
        int tid, shift, port_mask;

        if (extend) {
                tid = tagged ? MVPP2_PE_ETYPE_EDSA_TAGGED :
                      MVPP2_PE_ETYPE_EDSA_UNTAGGED;
                port_mask = 0;
                shift = 8;
        } else {
                tid = tagged ? MVPP2_PE_ETYPE_DSA_TAGGED :
                      MVPP2_PE_ETYPE_DSA_UNTAGGED;
                port_mask = MVPP2_PRS_PORT_MASK;
                shift = 4;
        }

        if (priv->prs_shadow[tid].valid) {
                /* Entry exist - update port only */
                pe.index = tid;
                mvpp2_prs_hw_read(priv, &pe);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_DSA);
                pe.index = tid;

                /* Set ethertype */
                mvpp2_prs_match_etype(&pe, 0, ETH_P_EDSA);
                mvpp2_prs_match_etype(&pe, 2, 0);

                mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_DSA_MASK,
                                         MVPP2_PRS_RI_DSA_MASK);
                /* Shift ethertype + 2 byte reserved + tag*/
                mvpp2_prs_sram_shift_set(&pe, 2 + MVPP2_ETH_TYPE_LEN + shift,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

                /* Update shadow table */
                mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_DSA);

                if (tagged) {
                        /* Set tagged bit in DSA tag */
                        mvpp2_prs_tcam_data_byte_set(&pe,
                                                     MVPP2_ETH_TYPE_LEN + 2 + 3,
                                                 MVPP2_PRS_TCAM_DSA_TAGGED_BIT,
                                                 MVPP2_PRS_TCAM_DSA_TAGGED_BIT);
                        /* Clear all ai bits for next iteration */
                        mvpp2_prs_sram_ai_update(&pe, 0,
                                                 MVPP2_PRS_SRAM_AI_MASK);
                        /* If packet is tagged continue check vlans */
                        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VLAN);
                } else {
                        /* Set result info bits to 'no vlans' */
                        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_VLAN_NONE,
                                                 MVPP2_PRS_RI_VLAN_MASK);
                        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);
                }
                /* Mask/unmask all ports, depending on dsa type */
                mvpp2_prs_tcam_port_map_set(&pe, port_mask);
        }

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

        mvpp2_prs_hw_write(priv, &pe);
}

/* Search for existing single/triple vlan entry */
static struct mvpp2_prs_entry *mvpp2_prs_vlan_find(struct mvpp2 *priv,
                                                   unsigned short tpid, int ai)
{
        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_VLAN);

        /* Go through the all entries with MVPP2_PRS_LU_VLAN */
        for (tid = MVPP2_PE_FIRST_FREE_TID;
             tid <= MVPP2_PE_LAST_FREE_TID; tid++) {
                unsigned int ri_bits, ai_bits;
                bool match;

                if (!priv->prs_shadow[tid].valid ||
                    priv->prs_shadow[tid].lu != MVPP2_PRS_LU_VLAN)
                        continue;

                pe->index = tid;

                mvpp2_prs_hw_read(priv, pe);
                match = mvpp2_prs_tcam_data_cmp(pe, 0, swab16(tpid));
                if (!match)
                        continue;

                /* Get vlan type */
                ri_bits = mvpp2_prs_sram_ri_get(pe);
                ri_bits &= MVPP2_PRS_RI_VLAN_MASK;

                /* Get current ai value from tcam */
                ai_bits = mvpp2_prs_tcam_ai_get(pe);
                /* Clear double vlan bit */
                ai_bits &= ~MVPP2_PRS_DBL_VLAN_AI_BIT;

                if (ai != ai_bits)
                        continue;

                if (ri_bits == MVPP2_PRS_RI_VLAN_SINGLE ||
                    ri_bits == MVPP2_PRS_RI_VLAN_TRIPLE)
                        return pe;
        }
        kfree(pe);

        return NULL;
}

/* Add/update single/triple vlan entry */
static int mvpp2_prs_vlan_add(struct mvpp2 *priv, unsigned short tpid, int ai,
                              unsigned int port_map)
{
        struct mvpp2_prs_entry *pe;
        int tid_aux, tid;
        int ret = 0;

        pe = mvpp2_prs_vlan_find(priv, tpid, ai);

        if (!pe) {
                /* Create new tcam entry */
                tid = mvpp2_prs_tcam_first_free(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;

                /* Get last double vlan tid */
                for (tid_aux = MVPP2_PE_LAST_FREE_TID;
                     tid_aux >= MVPP2_PE_FIRST_FREE_TID; tid_aux--) {
                        unsigned int ri_bits;

                        if (!priv->prs_shadow[tid_aux].valid ||
                            priv->prs_shadow[tid_aux].lu != MVPP2_PRS_LU_VLAN)
                                continue;

                        pe->index = tid_aux;
                        mvpp2_prs_hw_read(priv, pe);
                        ri_bits = mvpp2_prs_sram_ri_get(pe);
                        if ((ri_bits & MVPP2_PRS_RI_VLAN_MASK) ==
                            MVPP2_PRS_RI_VLAN_DOUBLE)
                                break;
                }

                if (tid <= tid_aux) {
                        ret = -EINVAL;
                        goto free_pe;
                }

                memset(pe, 0, sizeof(*pe));
                mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_VLAN);
                pe->index = tid;

                mvpp2_prs_match_etype(pe, 0, tpid);

                mvpp2_prs_sram_next_lu_set(pe, MVPP2_PRS_LU_L2);
                /* Shift 4 bytes - skip 1 vlan tag */
                mvpp2_prs_sram_shift_set(pe, MVPP2_VLAN_TAG_LEN,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
                /* Clear all ai bits for next iteration */
                mvpp2_prs_sram_ai_update(pe, 0, MVPP2_PRS_SRAM_AI_MASK);

                if (ai == MVPP2_PRS_SINGLE_VLAN_AI) {
                        mvpp2_prs_sram_ri_update(pe, MVPP2_PRS_RI_VLAN_SINGLE,
                                                 MVPP2_PRS_RI_VLAN_MASK);
                } else {
                        ai |= MVPP2_PRS_DBL_VLAN_AI_BIT;
                        mvpp2_prs_sram_ri_update(pe, MVPP2_PRS_RI_VLAN_TRIPLE,
                                                 MVPP2_PRS_RI_VLAN_MASK);
                }
                mvpp2_prs_tcam_ai_update(pe, ai, MVPP2_PRS_SRAM_AI_MASK);

                mvpp2_prs_shadow_set(priv, pe->index, MVPP2_PRS_LU_VLAN);
        }
        /* Update ports' mask */
        mvpp2_prs_tcam_port_map_set(pe, port_map);

        mvpp2_prs_hw_write(priv, pe);
free_pe:
        kfree(pe);

        return ret;
}

/* Get first free double vlan ai number */
static int mvpp2_prs_double_vlan_ai_free_get(struct mvpp2 *priv)
{
        int i;

        for (i = 1; i < MVPP2_PRS_DBL_VLANS_MAX; i++) {
                if (!priv->prs_double_vlans[i])
                        return i;
        }

        return -EINVAL;
}

/* Search for existing double vlan entry */
static struct mvpp2_prs_entry *mvpp2_prs_double_vlan_find(struct mvpp2 *priv,
                                                          unsigned short tpid1,
                                                          unsigned short tpid2)
{
        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_VLAN);

        /* Go through the all entries with MVPP2_PRS_LU_VLAN */
        for (tid = MVPP2_PE_FIRST_FREE_TID;
             tid <= MVPP2_PE_LAST_FREE_TID; tid++) {
                unsigned int ri_mask;
                bool match;

                if (!priv->prs_shadow[tid].valid ||
                    priv->prs_shadow[tid].lu != MVPP2_PRS_LU_VLAN)
                        continue;

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

                match = mvpp2_prs_tcam_data_cmp(pe, 0, swab16(tpid1))
                        && mvpp2_prs_tcam_data_cmp(pe, 4, swab16(tpid2));

                if (!match)
                        continue;

                ri_mask = mvpp2_prs_sram_ri_get(pe) & MVPP2_PRS_RI_VLAN_MASK;
                if (ri_mask == MVPP2_PRS_RI_VLAN_DOUBLE)
                        return pe;
        }
        kfree(pe);

        return NULL;
}

/* Add or update double vlan entry */
static int mvpp2_prs_double_vlan_add(struct mvpp2 *priv, unsigned short tpid1,
                                     unsigned short tpid2,
                                     unsigned int port_map)
{
        struct mvpp2_prs_entry *pe;
        int tid_aux, tid, ai, ret = 0;

        pe = mvpp2_prs_double_vlan_find(priv, tpid1, tpid2);

        if (!pe) {
                /* Create new tcam entry */
                tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                MVPP2_PE_LAST_FREE_TID);
                if (tid < 0)
                        return tid;

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

                /* Set ai value for new double vlan entry */
                ai = mvpp2_prs_double_vlan_ai_free_get(priv);
                if (ai < 0) {
                        ret = ai;
                        goto free_pe;
                }

                /* Get first single/triple vlan tid */
                for (tid_aux = MVPP2_PE_FIRST_FREE_TID;
                     tid_aux <= MVPP2_PE_LAST_FREE_TID; tid_aux++) {
                        unsigned int ri_bits;

                        if (!priv->prs_shadow[tid_aux].valid ||
                            priv->prs_shadow[tid_aux].lu != MVPP2_PRS_LU_VLAN)
                                continue;

                        pe->index = tid_aux;
                        mvpp2_prs_hw_read(priv, pe);
                        ri_bits = mvpp2_prs_sram_ri_get(pe);
                        ri_bits &= MVPP2_PRS_RI_VLAN_MASK;
                        if (ri_bits == MVPP2_PRS_RI_VLAN_SINGLE ||
                            ri_bits == MVPP2_PRS_RI_VLAN_TRIPLE)
                                break;
                }

                if (tid >= tid_aux) {
                        ret = -ERANGE;
                        goto free_pe;
                }

                memset(pe, 0, sizeof(*pe));
                mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_VLAN);
                pe->index = tid;

                priv->prs_double_vlans[ai] = true;

                mvpp2_prs_match_etype(pe, 0, tpid1);
                mvpp2_prs_match_etype(pe, 4, tpid2);

                mvpp2_prs_sram_next_lu_set(pe, MVPP2_PRS_LU_VLAN);
                /* Shift 8 bytes - skip 2 vlan tags */
                mvpp2_prs_sram_shift_set(pe, 2 * MVPP2_VLAN_TAG_LEN,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
                mvpp2_prs_sram_ri_update(pe, MVPP2_PRS_RI_VLAN_DOUBLE,
                                         MVPP2_PRS_RI_VLAN_MASK);
                mvpp2_prs_sram_ai_update(pe, ai | MVPP2_PRS_DBL_VLAN_AI_BIT,
                                         MVPP2_PRS_SRAM_AI_MASK);

                mvpp2_prs_shadow_set(priv, pe->index, MVPP2_PRS_LU_VLAN);
        }

        /* Update ports' mask */
        mvpp2_prs_tcam_port_map_set(pe, port_map);
        mvpp2_prs_hw_write(priv, pe);
free_pe:
        kfree(pe);
        return ret;
}

/* IPv4 header parsing for fragmentation and L4 offset */
static int mvpp2_prs_ip4_proto(struct mvpp2 *priv, unsigned short proto,
                               unsigned int ri, unsigned int ri_mask)
{
        struct mvpp2_prs_entry pe;
        int tid;

        if ((proto != IPPROTO_TCP) && (proto != IPPROTO_UDP) &&
            (proto != IPPROTO_IGMP))
                return -EINVAL;

        /* Not fragmented packet */
        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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
        pe.index = tid;

        /* Set next lu to IPv4 */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
        mvpp2_prs_sram_shift_set(&pe, 12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        /* Set L4 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                  sizeof(struct iphdr) - 4,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);
        mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
                                 MVPP2_PRS_IPV4_DIP_AI_BIT);
        mvpp2_prs_sram_ri_update(&pe, ri, ri_mask | MVPP2_PRS_RI_IP_FRAG_MASK);

        mvpp2_prs_tcam_data_byte_set(&pe, 2, 0x00,
                                     MVPP2_PRS_TCAM_PROTO_MASK_L);
        mvpp2_prs_tcam_data_byte_set(&pe, 3, 0x00,
                                     MVPP2_PRS_TCAM_PROTO_MASK);

        mvpp2_prs_tcam_data_byte_set(&pe, 5, proto, MVPP2_PRS_TCAM_PROTO_MASK);
        mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
        /* 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_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        /* Fragmented packet */
        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 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, ri, ri_mask);

        mvpp2_prs_sram_ri_update(&pe, ri | MVPP2_PRS_RI_IP_FRAG_TRUE,
                                 ri_mask | MVPP2_PRS_RI_IP_FRAG_MASK);

        mvpp2_prs_tcam_data_byte_set(&pe, 2, 0x00, 0x0);
        mvpp2_prs_tcam_data_byte_set(&pe, 3, 0x00, 0x0);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* IPv4 L3 multicast or broadcast */
static int mvpp2_prs_ip4_cast(struct mvpp2 *priv, unsigned short l3_cast)
{
        struct mvpp2_prs_entry pe;
        int mask, tid;

        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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
        pe.index = tid;

        switch (l3_cast) {
        case MVPP2_PRS_L3_MULTI_CAST:
                mvpp2_prs_tcam_data_byte_set(&pe, 0, MVPP2_PRS_IPV4_MC,
                                             MVPP2_PRS_IPV4_MC_MASK);
                mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_MCAST,
                                         MVPP2_PRS_RI_L3_ADDR_MASK);
                break;
        case  MVPP2_PRS_L3_BROAD_CAST:
                mask = MVPP2_PRS_IPV4_BC_MASK;
                mvpp2_prs_tcam_data_byte_set(&pe, 0, mask, mask);
                mvpp2_prs_tcam_data_byte_set(&pe, 1, mask, mask);
                mvpp2_prs_tcam_data_byte_set(&pe, 2, mask, mask);
                mvpp2_prs_tcam_data_byte_set(&pe, 3, mask, mask);
                mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_BCAST,
                                         MVPP2_PRS_RI_L3_ADDR_MASK);
                break;
        default:
                return -EINVAL;
        }

        /* Finished: go to flowid generation */
        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_tcam_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
                                 MVPP2_PRS_IPV4_DIP_AI_BIT);
        /* 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_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Set entries for protocols over IPv6  */
static int mvpp2_prs_ip6_proto(struct mvpp2 *priv, unsigned short proto,
                               unsigned int ri, unsigned int ri_mask)
{
        struct mvpp2_prs_entry pe;
        int tid;

        if ((proto != IPPROTO_TCP) && (proto != IPPROTO_UDP) &&
            (proto != IPPROTO_ICMPV6) && (proto != IPPROTO_IPIP))
                return -EINVAL;

        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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = tid;

        /* Finished: go to flowid generation */
        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, ri, ri_mask);
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                  sizeof(struct ipv6hdr) - 6,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        mvpp2_prs_tcam_data_byte_set(&pe, 0, proto, MVPP2_PRS_TCAM_PROTO_MASK);
        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV6_NO_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

        /* Write HW */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_IP6);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* IPv6 L3 multicast entry */
static int mvpp2_prs_ip6_cast(struct mvpp2 *priv, unsigned short l3_cast)
{
        struct mvpp2_prs_entry pe;
        int tid;

        if (l3_cast != MVPP2_PRS_L3_MULTI_CAST)
                return -EINVAL;

        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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = tid;

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP6);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_MCAST,
                                 MVPP2_PRS_RI_L3_ADDR_MASK);
        mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV6_NO_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* Shift back to IPv6 NH */
        mvpp2_prs_sram_shift_set(&pe, -18, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        mvpp2_prs_tcam_data_byte_set(&pe, 0, MVPP2_PRS_IPV6_MC,
                                     MVPP2_PRS_IPV6_MC_MASK);
        mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* 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_IP6);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* 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(pe));
                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(pe));

        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(pe));

        /* 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, 0, MVPP2_PE_MAC_MC_ALL, false);
        mvpp2_prs_mac_multi_set(priv, 0, MVPP2_PE_MAC_MC_IP6, false);
}

/* Set default entries for various types of dsa packets */
static void mvpp2_prs_dsa_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;

        /* None tagged EDSA entry - place holder */
        mvpp2_prs_dsa_tag_set(priv, 0, false, MVPP2_PRS_UNTAGGED,
                              MVPP2_PRS_EDSA);

        /* Tagged EDSA entry - place holder */
        mvpp2_prs_dsa_tag_set(priv, 0, false, MVPP2_PRS_TAGGED, MVPP2_PRS_EDSA);

        /* None tagged DSA entry - place holder */
        mvpp2_prs_dsa_tag_set(priv, 0, false, MVPP2_PRS_UNTAGGED,
                              MVPP2_PRS_DSA);

        /* Tagged DSA entry - place holder */
        mvpp2_prs_dsa_tag_set(priv, 0, false, MVPP2_PRS_TAGGED, MVPP2_PRS_DSA);

        /* None tagged EDSA ethertype entry - place holder*/
        mvpp2_prs_dsa_tag_ethertype_set(priv, 0, false,
                                        MVPP2_PRS_UNTAGGED, MVPP2_PRS_EDSA);

        /* Tagged EDSA ethertype entry - place holder*/
        mvpp2_prs_dsa_tag_ethertype_set(priv, 0, false,
                                        MVPP2_PRS_TAGGED, MVPP2_PRS_EDSA);

        /* None tagged DSA ethertype entry */
        mvpp2_prs_dsa_tag_ethertype_set(priv, 0, true,
                                        MVPP2_PRS_UNTAGGED, MVPP2_PRS_DSA);

        /* Tagged DSA ethertype entry */
        mvpp2_prs_dsa_tag_ethertype_set(priv, 0, true,
                                        MVPP2_PRS_TAGGED, MVPP2_PRS_DSA);

        /* Set default entry, in case DSA or EDSA tag not found */
        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_DSA);
        pe.index = MVPP2_PE_DSA_DEFAULT;
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VLAN);

        /* Shift 0 bytes */
        mvpp2_prs_sram_shift_set(&pe, 0, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_MAC);

        /* Clear all sram ai bits for next iteration */
        mvpp2_prs_sram_ai_update(&pe, 0, MVPP2_PRS_SRAM_AI_MASK);

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

        mvpp2_prs_hw_write(priv, &pe);
}

/* 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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, ETH_P_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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, ETH_P_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(pe));
        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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, ETH_P_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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, ETH_P_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;
}

/* Configure vlan entries and detect up to 2 successive VLAN tags.
 * Possible options:
 * 0x8100, 0x88A8
 * 0x8100, 0x8100
 * 0x8100
 * 0x88A8
 */
static int mvpp2_prs_vlan_init(struct platform_device *pdev, struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;
        int err;

        priv->prs_double_vlans = devm_kcalloc(&pdev->dev, sizeof(bool),
                                              MVPP2_PRS_DBL_VLANS_MAX,
                                              GFP_KERNEL);
        if (!priv->prs_double_vlans)
                return -ENOMEM;

        /* Double VLAN: 0x8100, 0x88A8 */
        err = mvpp2_prs_double_vlan_add(priv, ETH_P_8021Q, ETH_P_8021AD,
                                        MVPP2_PRS_PORT_MASK);
        if (err)
                return err;

        /* Double VLAN: 0x8100, 0x8100 */
        err = mvpp2_prs_double_vlan_add(priv, ETH_P_8021Q, ETH_P_8021Q,
                                        MVPP2_PRS_PORT_MASK);
        if (err)
                return err;

        /* Single VLAN: 0x88a8 */
        err = mvpp2_prs_vlan_add(priv, ETH_P_8021AD, MVPP2_PRS_SINGLE_VLAN_AI,
                                 MVPP2_PRS_PORT_MASK);
        if (err)
                return err;

        /* Single VLAN: 0x8100 */
        err = mvpp2_prs_vlan_add(priv, ETH_P_8021Q, MVPP2_PRS_SINGLE_VLAN_AI,
                                 MVPP2_PRS_PORT_MASK);
        if (err)
                return err;

        /* Set default double vlan entry */
        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VLAN);
        pe.index = MVPP2_PE_VLAN_DBL;

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);
        /* Clear ai for next iterations */
        mvpp2_prs_sram_ai_update(&pe, 0, MVPP2_PRS_SRAM_AI_MASK);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_VLAN_DOUBLE,
                                 MVPP2_PRS_RI_VLAN_MASK);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_DBL_VLAN_AI_BIT,
                                 MVPP2_PRS_DBL_VLAN_AI_BIT);
        /* 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_VLAN);
        mvpp2_prs_hw_write(priv, &pe);

        /* Set default vlan none entry */
        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VLAN);
        pe.index = MVPP2_PE_VLAN_NONE;

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_VLAN_NONE,
                                 MVPP2_PRS_RI_VLAN_MASK);

        /* 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_VLAN);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Set entries for PPPoE ethertype */
static int mvpp2_prs_pppoe_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;
        int tid;

        /* IPv4 over PPPoE with 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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PPP_IP);

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4_OPT,
                                 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_PPPOE);
        mvpp2_prs_hw_write(priv, &pe);

        /* IPv4 over PPPoE without 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;

        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);

        /* 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,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_PPPOE);
        mvpp2_prs_hw_write(priv, &pe);

        /* IPv6 over 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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PPP_IPV6);

        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);
        /* Skip eth_type + 4 bytes of IPv6 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_PPPOE);
        mvpp2_prs_hw_write(priv, &pe);

        /* Non-IP over 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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        pe.index = tid;

        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UN,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        /* Set L3 offset even if 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_PPPOE);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Initialize entries for IPv4 */
static int mvpp2_prs_ip4_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;
        int err;

        /* Set entries for TCP, UDP and IGMP over IPv4 */
        err = mvpp2_prs_ip4_proto(priv, IPPROTO_TCP, MVPP2_PRS_RI_L4_TCP,
                                  MVPP2_PRS_RI_L4_PROTO_MASK);
        if (err)
                return err;

        err = mvpp2_prs_ip4_proto(priv, IPPROTO_UDP, MVPP2_PRS_RI_L4_UDP,
                                  MVPP2_PRS_RI_L4_PROTO_MASK);
        if (err)
                return err;

        err = mvpp2_prs_ip4_proto(priv, IPPROTO_IGMP,
                                  MVPP2_PRS_RI_CPU_CODE_RX_SPEC |
                                  MVPP2_PRS_RI_UDF3_RX_SPECIAL,
                                  MVPP2_PRS_RI_CPU_CODE_MASK |
                                  MVPP2_PRS_RI_UDF3_MASK);
        if (err)
                return err;

        /* IPv4 Broadcast */
        err = mvpp2_prs_ip4_cast(priv, MVPP2_PRS_L3_BROAD_CAST);
        if (err)
                return err;

        /* IPv4 Multicast */
        err = mvpp2_prs_ip4_cast(priv, MVPP2_PRS_L3_MULTI_CAST);
        if (err)
                return err;

        /* Default IPv4 entry for unknown protocols */
        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
        pe.index = MVPP2_PE_IP4_PROTO_UN;

        /* Set next lu to IPv4 */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
        mvpp2_prs_sram_shift_set(&pe, 12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
        /* Set L4 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                  sizeof(struct iphdr) - 4,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);
        mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
                                 MVPP2_PRS_IPV4_DIP_AI_BIT);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L4_OTHER,
                                 MVPP2_PRS_RI_L4_PROTO_MASK);

        mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
        /* 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_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        /* Default IPv4 entry for unicast address */
        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
        pe.index = MVPP2_PE_IP4_ADDR_UN;

        /* Finished: go to flowid generation */
        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_UCAST,
                                 MVPP2_PRS_RI_L3_ADDR_MASK);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
                                 MVPP2_PRS_IPV4_DIP_AI_BIT);
        /* 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_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Initialize entries for IPv6 */
static int mvpp2_prs_ip6_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;
        int tid, err;

        /* Set entries for TCP, UDP and ICMP over IPv6 */
        err = mvpp2_prs_ip6_proto(priv, IPPROTO_TCP,
                                  MVPP2_PRS_RI_L4_TCP,
                                  MVPP2_PRS_RI_L4_PROTO_MASK);
        if (err)
                return err;

        err = mvpp2_prs_ip6_proto(priv, IPPROTO_UDP,
                                  MVPP2_PRS_RI_L4_UDP,
                                  MVPP2_PRS_RI_L4_PROTO_MASK);
        if (err)
                return err;

        err = mvpp2_prs_ip6_proto(priv, IPPROTO_ICMPV6,
                                  MVPP2_PRS_RI_CPU_CODE_RX_SPEC |
                                  MVPP2_PRS_RI_UDF3_RX_SPECIAL,
                                  MVPP2_PRS_RI_CPU_CODE_MASK |
                                  MVPP2_PRS_RI_UDF3_MASK);
        if (err)
                return err;

        /* IPv4 is the last header. This is similar case as 6-TCP or 17-UDP */
        /* Result Info: UDF7=1, DS lite */
        err = mvpp2_prs_ip6_proto(priv, IPPROTO_IPIP,
                                  MVPP2_PRS_RI_UDF7_IP6_LITE,
                                  MVPP2_PRS_RI_UDF7_MASK);
        if (err)
                return err;

        /* IPv6 multicast */
        err = mvpp2_prs_ip6_cast(priv, MVPP2_PRS_L3_MULTI_CAST);
        if (err)
                return err;

        /* Entry for checking hop limit */
        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(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = tid;

        /* Finished: go to flowid generation */
        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_UN |
                                 MVPP2_PRS_RI_DROP_MASK,
                                 MVPP2_PRS_RI_L3_PROTO_MASK |
                                 MVPP2_PRS_RI_DROP_MASK);

        mvpp2_prs_tcam_data_byte_set(&pe, 1, 0x00, MVPP2_PRS_IPV6_HOP_MASK);
        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV6_NO_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_NO_EXT_AI_BIT);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        /* Default IPv6 entry for unknown protocols */
        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = MVPP2_PE_IP6_PROTO_UN;

        /* Finished: go to flowid generation */
        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_L4_OTHER,
                                 MVPP2_PRS_RI_L4_PROTO_MASK);
        /* Set L4 offset relatively to our current place */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                  sizeof(struct ipv6hdr) - 4,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV6_NO_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* 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_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        /* Default IPv6 entry for unknown ext protocols */
        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = MVPP2_PE_IP6_EXT_PROTO_UN;

        /* Finished: go to flowid generation */
        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_L4_OTHER,
                                 MVPP2_PRS_RI_L4_PROTO_MASK);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV6_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_EXT_AI_BIT);
        /* 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_IP4);
        mvpp2_prs_hw_write(priv, &pe);

        /* Default IPv6 entry for unicast address */
        memset(&pe, 0, sizeof(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = MVPP2_PE_IP6_ADDR_UN;

        /* Finished: go to IPv6 again */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP6);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UCAST,
                                 MVPP2_PRS_RI_L3_ADDR_MASK);
        mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV6_NO_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* Shift back to IPV6 NH */
        mvpp2_prs_sram_shift_set(&pe, -18, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* 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_IP6);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Parser default initialization */
static int mvpp2_prs_default_init(struct platform_device *pdev,
                                  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(&pdev->dev, MVPP2_PRS_TCAM_SRAM_SIZE,
                                        sizeof(*priv->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);

        mvpp2_prs_dsa_init(priv);

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

        err = mvpp2_prs_vlan_init(pdev, priv);
        if (err)
                return err;

        err = mvpp2_prs_pppoe_init(priv);
        if (err)
                return err;

        err = mvpp2_prs_ip6_init(priv);
        if (err)
                return err;

        err = mvpp2_prs_ip4_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_ATOMIC);
        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_ATOMIC);
                if (!pe)
                        return -ENOMEM;
                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 -EINVAL;
                }
                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 */
        if (is_broadcast_ether_addr(da))
                ri = MVPP2_PRS_RI_L2_BCAST;
        else if (is_multicast_ether_addr(da))
                ri = MVPP2_PRS_RI_L2_MCAST;
        else
                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 net_device *dev, const u8 *da)
{
        struct mvpp2_port *port = netdev_priv(dev);
        int err;

        /* Remove old parser entry */
        err = mvpp2_prs_mac_da_accept(port->priv, port->id, dev->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 */
        ether_addr_copy(dev->dev_addr, da);

        return 0;
}

/* Delete all port's multicast simple (not range) entries */
static void mvpp2_prs_mcast_del_all(struct mvpp2 *priv, int port)
{
        struct mvpp2_prs_entry pe;
        int index, tid;

        for (tid = MVPP2_PE_FIRST_FREE_TID;
             tid <= MVPP2_PE_LAST_FREE_TID; tid++) {
                unsigned char da[ETH_ALEN], da_mask[ETH_ALEN];

                if (!priv->prs_shadow[tid].valid ||
                    (priv->prs_shadow[tid].lu != MVPP2_PRS_LU_MAC) ||
                    (priv->prs_shadow[tid].udf != MVPP2_PRS_UDF_MAC_DEF))
                        continue;

                /* Only simple mac entries */
                pe.index = tid;
                mvpp2_prs_hw_read(priv, &pe);

                /* Read mac addr from entry */
                for (index = 0; index < ETH_ALEN; index++)
                        mvpp2_prs_tcam_data_byte_get(&pe, index, &da[index],
                                                     &da_mask[index]);

                if (is_multicast_ether_addr(da) && !is_broadcast_ether_addr(da))
                        /* Delete this entry */
                        mvpp2_prs_mac_da_accept(priv, port, da, false);
        }
}

static int mvpp2_prs_tag_mode_set(struct mvpp2 *priv, int port, int type)
{
        switch (type) {
        case MVPP2_TAG_TYPE_EDSA:
                /* Add port to EDSA entries */
                mvpp2_prs_dsa_tag_set(priv, port, true,
                                      MVPP2_PRS_TAGGED, MVPP2_PRS_EDSA);
                mvpp2_prs_dsa_tag_set(priv, port, true,
                                      MVPP2_PRS_UNTAGGED, MVPP2_PRS_EDSA);
                /* Remove port from DSA entries */
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_TAGGED, MVPP2_PRS_DSA);
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_UNTAGGED, MVPP2_PRS_DSA);
                break;

        case MVPP2_TAG_TYPE_DSA:
                /* Add port to DSA entries */
                mvpp2_prs_dsa_tag_set(priv, port, true,
                                      MVPP2_PRS_TAGGED, MVPP2_PRS_DSA);
                mvpp2_prs_dsa_tag_set(priv, port, true,
                                      MVPP2_PRS_UNTAGGED, MVPP2_PRS_DSA);
                /* Remove port from EDSA entries */
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_TAGGED, MVPP2_PRS_EDSA);
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_UNTAGGED, MVPP2_PRS_EDSA);
                break;

        case MVPP2_TAG_TYPE_MH:
        case MVPP2_TAG_TYPE_NONE:
                /* Remove port form EDSA and DSA entries */
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_TAGGED, MVPP2_PRS_DSA);
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_UNTAGGED, MVPP2_PRS_DSA);
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_TAGGED, MVPP2_PRS_EDSA);
                mvpp2_prs_dsa_tag_set(priv, port, false,
                                      MVPP2_PRS_UNTAGGED, MVPP2_PRS_EDSA);
                break;

        default:
                if ((type < 0) || (type > MVPP2_TAG_TYPE_EDSA))
                        return -EINVAL;
        }

        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, sizeof(fe.data));
        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);
}

static void *mvpp2_frag_alloc(const struct mvpp2_bm_pool *pool)
{
        if (likely(pool->frag_size <= PAGE_SIZE))
                return netdev_alloc_frag(pool->frag_size);
        else
                return kmalloc(pool->frag_size, GFP_ATOMIC);
}

static void mvpp2_frag_free(const struct mvpp2_bm_pool *pool, void *data)
{
        if (likely(pool->frag_size <= PAGE_SIZE))
                skb_free_frag(data);
        else
                kfree(data);
}

/* Buffer Manager configuration routines */

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

        /* Number of buffer pointers must be a multiple of 16, as per
         * hardware constraints
         */
        if (!IS_ALIGNED(size, 16))
                return -EINVAL;

        /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 needs 16
         * bytes per buffer pointer
         */
        if (priv->hw_version == MVPP21)
                bm_pool->size_bytes = 2 * sizeof(u32) * size;
        else
                bm_pool->size_bytes = 2 * sizeof(u64) * size;

        bm_pool->virt_addr = dma_alloc_coherent(&pdev->dev, bm_pool->size_bytes,
                                                &bm_pool->dma_addr,
                                                GFP_KERNEL);
        if (!bm_pool->virt_addr)
                return -ENOMEM;

        if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr,
                        MVPP2_BM_POOL_PTR_ALIGN)) {
                dma_free_coherent(&pdev->dev, bm_pool->size_bytes,
                                  bm_pool->virt_addr, bm_pool->dma_addr);
                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),
                    lower_32_bits(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);
}

static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv,
                                    struct mvpp2_bm_pool *bm_pool,
                                    dma_addr_t *dma_addr,
                                    phys_addr_t *phys_addr)
{
        int cpu = get_cpu();

        *dma_addr = mvpp2_percpu_read(priv, cpu,
                                      MVPP2_BM_PHY_ALLOC_REG(bm_pool->id));
        *phys_addr = mvpp2_percpu_read(priv, cpu, MVPP2_BM_VIRT_ALLOC_REG);

        if (priv->hw_version == MVPP22) {
                u32 val;
                u32 dma_addr_highbits, phys_addr_highbits;

                val = mvpp2_percpu_read(priv, cpu, MVPP22_BM_ADDR_HIGH_ALLOC);
                dma_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_PHYS_MASK);
                phys_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_VIRT_MASK) >>
                        MVPP22_BM_ADDR_HIGH_VIRT_SHIFT;

                if (sizeof(dma_addr_t) == 8)
                        *dma_addr |= (u64)dma_addr_highbits << 32;

                if (sizeof(phys_addr_t) == 8)
                        *phys_addr |= (u64)phys_addr_highbits << 32;
        }

        put_cpu();
}

/* Free all buffers from the pool */
static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv,
                               struct mvpp2_bm_pool *bm_pool)
{
        int i;

        for (i = 0; i < bm_pool->buf_num; i++) {
                dma_addr_t buf_dma_addr;
                phys_addr_t buf_phys_addr;
                void *data;

                mvpp2_bm_bufs_get_addrs(dev, priv, bm_pool,
                                        &buf_dma_addr, &buf_phys_addr);

                dma_unmap_single(dev, buf_dma_addr,
                                 bm_pool->buf_size, DMA_FROM_DEVICE);

                data = (void *)phys_to_virt(buf_phys_addr);
                if (!data)
                        break;

                mvpp2_frag_free(bm_pool, data);
        }

        /* Update BM driver with number of buffers removed from pool */
        bm_pool->buf_num -= i;
}

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

        mvpp2_bm_bufs_free(&pdev->dev, priv, bm_pool);
        if (bm_pool->buf_num) {
                WARN(1, "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);

        dma_free_coherent(&pdev->dev, bm_pool->size_bytes,
                          bm_pool->virt_addr,
                          bm_pool->dma_addr);
        return 0;
}

static int mvpp2_bm_pools_init(struct platform_device *pdev,
                               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(pdev, 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(pdev, priv, &priv->bm_pools[i]);
        return err;
}

static int mvpp2_bm_init(struct platform_device *pdev, 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(&pdev->dev, MVPP2_BM_POOLS_NUM,
                                      sizeof(*priv->bm_pools), GFP_KERNEL);
        if (!priv->bm_pools)
                return -ENOMEM;

        err = mvpp2_bm_pools_init(pdev, 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, mask;
        int prxq;

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

        if (port->priv->hw_version == MVPP21)
                mask = MVPP21_RXQ_POOL_LONG_MASK;
        else
                mask = MVPP22_RXQ_POOL_LONG_MASK;

        val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
        val &= ~mask;
        val |= (long_pool << MVPP2_RXQ_POOL_LONG_OFFS) & mask;
        mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
}

/* Attach short pool to rxq */
static void mvpp2_rxq_short_pool_set(struct mvpp2_port *port,
                                     int lrxq, int short_pool)
{
        u32 val, mask;
        int prxq;

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

        if (port->priv->hw_version == MVPP21)
                mask = MVPP21_RXQ_POOL_SHORT_MASK;
        else
                mask = MVPP22_RXQ_POOL_SHORT_MASK;

        val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
        val &= ~mask;
        val |= (short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) & mask;
        mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
}

static void *mvpp2_buf_alloc(struct mvpp2_port *port,
                             struct mvpp2_bm_pool *bm_pool,
                             dma_addr_t *buf_dma_addr,
                             phys_addr_t *buf_phys_addr,
                             gfp_t gfp_mask)
{
        dma_addr_t dma_addr;
        void *data;

        data = mvpp2_frag_alloc(bm_pool);
        if (!data)
                return NULL;

        dma_addr = dma_map_single(port->dev->dev.parent, data,
                                  MVPP2_RX_BUF_SIZE(bm_pool->pkt_size),
                                  DMA_FROM_DEVICE);
        if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) {
                mvpp2_frag_free(bm_pool, data);
                return NULL;
        }
        *buf_dma_addr = dma_addr;
        *buf_phys_addr = virt_to_phys(data);

        return data;
}

/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
                                     dma_addr_t buf_dma_addr,
                                     phys_addr_t buf_phys_addr)
{
        int cpu = get_cpu();

        if (port->priv->hw_version == MVPP22) {
                u32 val = 0;

                if (sizeof(dma_addr_t) == 8)
                        val |= upper_32_bits(buf_dma_addr) &
                                MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK;

                if (sizeof(phys_addr_t) == 8)
                        val |= (upper_32_bits(buf_phys_addr)
                                << MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT) &
                                MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK;

                mvpp2_percpu_write(port->priv, cpu,
                                   MVPP22_BM_ADDR_HIGH_RLS_REG, val);
        }

        /* 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_percpu_write(port->priv, cpu,
                           MVPP2_BM_VIRT_RLS_REG, buf_phys_addr);
        mvpp2_percpu_write(port->priv, cpu,
                           MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr);

        put_cpu();
}

/* 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, buf_size, total_size;
        dma_addr_t dma_addr;
        phys_addr_t phys_addr;
        void *buf;

        buf_size = MVPP2_RX_BUF_SIZE(bm_pool->pkt_size);
        total_size = MVPP2_RX_TOTAL_SIZE(buf_size);

        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++) {
                buf = mvpp2_buf_alloc(port, bm_pool, &dma_addr,
                                      &phys_addr, GFP_KERNEL);
                if (!buf)
                        break;

                mvpp2_bm_pool_put(port, bm_pool->id, dma_addr,
                                  phys_addr);
        }

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

        netdev_dbg(port->dev,
                   "%s pool %d: pkt_size=%4d, buf_size=%4d, total_size=%4d\n",
                   bm_pool->type == MVPP2_BM_SWF_SHORT ? "short" : " long",
                   bm_pool->id, bm_pool->pkt_size, buf_size, total_size);

        netdev_dbg(port->dev,
                   "%s pool %d: %d of %d buffers added\n",
                   bm_pool->type == MVPP2_BM_SWF_SHORT ? "short" : " long",
                   bm_pool->id, i, buf_num);
        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(port->dev->dev.parent,
                                           port->priv, new_pool);

                new_pool->pkt_size = pkt_size;
                new_pool->frag_size =
                        SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) +
                        MVPP2_SKB_SHINFO_SIZE;

                /* Allocate buffers for this pool */
                num = mvpp2_bm_bufs_add(port, new_pool, pkts_num);
                if (num != pkts_num) {
                        WARN(1, "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 < port->nrxqs; rxq++)
                        mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id);
        }

        if (!port->pool_short) {
                port->pool_short =
                        mvpp2_bm_pool_use(port, MVPP2_BM_SWF_SHORT_POOL,
                                          MVPP2_BM_SWF_SHORT,
                                          MVPP2_BM_SHORT_PKT_SIZE);
                if (!port->pool_short)
                        return -ENOMEM;

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

                for (rxq = 0; rxq < port->nrxqs; rxq++)
                        mvpp2_rxq_short_pool_set(port, rxq,
                                                 port->pool_short->id);
        }

        return 0;
}

static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2_bm_pool *port_pool = port->pool_long;
        int num, pkts_num = port_pool->buf_num;
        int pkt_size = MVPP2_RX_PKT_SIZE(mtu);

        /* Update BM pool with new buffer size */
        mvpp2_bm_bufs_free(dev->dev.parent, port->priv, port_pool);
        if (port_pool->buf_num) {
                WARN(1, "cannot free all buffers in pool %d\n", port_pool->id);
                return -EIO;
        }

        port_pool->pkt_size = pkt_size;
        port_pool->frag_size = SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) +
                MVPP2_SKB_SHINFO_SIZE;
        num = mvpp2_bm_bufs_add(port, port_pool, pkts_num);
        if (num != pkts_num) {
                WARN(1, "pool %d: %d of %d allocated\n",
                     port_pool->id, num, pkts_num);
                return -EIO;
        }

        mvpp2_bm_pool_bufsize_set(port->priv, port_pool,
                                  MVPP2_RX_BUF_SIZE(port_pool->pkt_size));
        dev->mtu = mtu;
        netdev_update_features(dev);
        return 0;
}

static inline void mvpp2_interrupts_enable(struct mvpp2_port *port)
{
        int i, sw_thread_mask = 0;

        for (i = 0; i < port->nqvecs; i++)
                sw_thread_mask |= port->qvecs[i].sw_thread_mask;

        mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
                    MVPP2_ISR_ENABLE_INTERRUPT(sw_thread_mask));
}

static inline void mvpp2_interrupts_disable(struct mvpp2_port *port)
{
        int i, sw_thread_mask = 0;

        for (i = 0; i < port->nqvecs; i++)
                sw_thread_mask |= port->qvecs[i].sw_thread_mask;

        mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
                    MVPP2_ISR_DISABLE_INTERRUPT(sw_thread_mask));
}

static inline void mvpp2_qvec_interrupt_enable(struct mvpp2_queue_vector *qvec)
{
        struct mvpp2_port *port = qvec->port;

        mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
                    MVPP2_ISR_ENABLE_INTERRUPT(qvec->sw_thread_mask));
}

static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec)
{
        struct mvpp2_port *port = qvec->port;

        mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
                    MVPP2_ISR_DISABLE_INTERRUPT(qvec->sw_thread_mask));
}

/* Mask the current CPU's Rx/Tx interrupts
 * Called by on_each_cpu(), guaranteed to run with migration disabled,
 * using smp_processor_id() is OK.
 */
static void mvpp2_interrupts_mask(void *arg)
{
        struct mvpp2_port *port = arg;

        mvpp2_percpu_write(port->priv, smp_processor_id(),
                           MVPP2_ISR_RX_TX_MASK_REG(port->id), 0);
}

/* Unmask the current CPU's Rx/Tx interrupts.
 * Called by on_each_cpu(), guaranteed to run with migration disabled,
 * using smp_processor_id() is OK.
 */
static void mvpp2_interrupts_unmask(void *arg)
{
        struct mvpp2_port *port = arg;
        u32 val;

        val = MVPP2_CAUSE_MISC_SUM_MASK |
                MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK;
        if (port->has_tx_irqs)
                val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;

        mvpp2_percpu_write(port->priv, smp_processor_id(),
                           MVPP2_ISR_RX_TX_MASK_REG(port->id), val);
}

static void
mvpp2_shared_interrupt_mask_unmask(struct mvpp2_port *port, bool mask)
{
        u32 val;
        int i;

        if (port->priv->hw_version != MVPP22)
                return;

        if (mask)
                val = 0;
        else
                val = MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK;

        for (i = 0; i < port->nqvecs; i++) {
                struct mvpp2_queue_vector *v = port->qvecs + i;

                if (v->type != MVPP2_QUEUE_VECTOR_SHARED)
                        continue;

                mvpp2_percpu_write(port->priv, v->sw_thread_id,
                                   MVPP2_ISR_RX_TX_MASK_REG(port->id), val);
        }
}

/* Port configuration routines */

static void mvpp22_gop_init_rgmii(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        u32 val;

        regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val);
        val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT;
        regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);

        regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val);
        if (port->gop_id == 2)
                val |= GENCONF_CTRL0_PORT0_RGMII | GENCONF_CTRL0_PORT1_RGMII;
        else if (port->gop_id == 3)
                val |= GENCONF_CTRL0_PORT1_RGMII_MII;
        regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val);
}

static void mvpp22_gop_init_sgmii(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        u32 val;

        regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val);
        val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT |
               GENCONF_PORT_CTRL0_RX_DATA_SAMPLE;
        regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);

        if (port->gop_id > 1) {
                regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val);
                if (port->gop_id == 2)
                        val &= ~GENCONF_CTRL0_PORT0_RGMII;
                else if (port->gop_id == 3)
                        val &= ~GENCONF_CTRL0_PORT1_RGMII_MII;
                regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val);
        }
}

static void mvpp22_gop_init_10gkr(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        void __iomem *mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id);
        void __iomem *xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id);
        u32 val;

        /* XPCS */
        val = readl(xpcs + MVPP22_XPCS_CFG0);
        val &= ~(MVPP22_XPCS_CFG0_PCS_MODE(0x3) |
                 MVPP22_XPCS_CFG0_ACTIVE_LANE(0x3));
        val |= MVPP22_XPCS_CFG0_ACTIVE_LANE(2);
        writel(val, xpcs + MVPP22_XPCS_CFG0);

        /* MPCS */
        val = readl(mpcs + MVPP22_MPCS_CTRL);
        val &= ~MVPP22_MPCS_CTRL_FWD_ERR_CONN;
        writel(val, mpcs + MVPP22_MPCS_CTRL);

        val = readl(mpcs + MVPP22_MPCS_CLK_RESET);
        val &= ~(MVPP22_MPCS_CLK_RESET_DIV_RATIO(0x7) | MAC_CLK_RESET_MAC |
                 MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX);
        val |= MVPP22_MPCS_CLK_RESET_DIV_RATIO(1);
        writel(val, mpcs + MVPP22_MPCS_CLK_RESET);

        val &= ~MVPP22_MPCS_CLK_RESET_DIV_SET;
        val |= MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX;
        writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
}

static int mvpp22_gop_init(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        u32 val;

        if (!priv->sysctrl_base)
                return 0;

        switch (port->phy_interface) {
        case PHY_INTERFACE_MODE_RGMII:
        case PHY_INTERFACE_MODE_RGMII_ID:
        case PHY_INTERFACE_MODE_RGMII_RXID:
        case PHY_INTERFACE_MODE_RGMII_TXID:
                if (port->gop_id == 0)
                        goto invalid_conf;
                mvpp22_gop_init_rgmii(port);
                break;
        case PHY_INTERFACE_MODE_SGMII:
                mvpp22_gop_init_sgmii(port);
                break;
        case PHY_INTERFACE_MODE_10GKR:
                if (port->gop_id != 0)
                        goto invalid_conf;
                mvpp22_gop_init_10gkr(port);
                break;
        default:
                goto unsupported_conf;
        }

        regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL1, &val);
        val |= GENCONF_PORT_CTRL1_RESET(port->gop_id) |
               GENCONF_PORT_CTRL1_EN(port->gop_id);
        regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL1, val);

        regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val);
        val |= GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR;
        regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);

        regmap_read(priv->sysctrl_base, GENCONF_SOFT_RESET1, &val);
        val |= GENCONF_SOFT_RESET1_GOP;
        regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val);

unsupported_conf:
        return 0;

invalid_conf:
        netdev_err(port->dev, "Invalid port configuration\n");
        return -EINVAL;
}

static void mvpp22_gop_unmask_irq(struct mvpp2_port *port)
{
        u32 val;

        if (phy_interface_mode_is_rgmii(port->phy_interface) ||
            port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                /* Enable the GMAC link status irq for this port */
                val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK);
                val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT;
                writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK);
        }

        if (port->gop_id == 0) {
                /* Enable the XLG/GIG irqs for this port */
                val = readl(port->base + MVPP22_XLG_EXT_INT_MASK);
                if (port->phy_interface == PHY_INTERFACE_MODE_10GKR)
                        val |= MVPP22_XLG_EXT_INT_MASK_XLG;
                else
                        val |= MVPP22_XLG_EXT_INT_MASK_GIG;
                writel(val, port->base + MVPP22_XLG_EXT_INT_MASK);
        }
}

static void mvpp22_gop_mask_irq(struct mvpp2_port *port)
{
        u32 val;

        if (port->gop_id == 0) {
                val = readl(port->base + MVPP22_XLG_EXT_INT_MASK);
                val &= ~(MVPP22_XLG_EXT_INT_MASK_XLG |
                         MVPP22_XLG_EXT_INT_MASK_GIG);
                writel(val, port->base + MVPP22_XLG_EXT_INT_MASK);
        }

        if (phy_interface_mode_is_rgmii(port->phy_interface) ||
            port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK);
                val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT;
                writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK);
        }
}

static void mvpp22_gop_setup_irq(struct mvpp2_port *port)
{
        u32 val;

        if (phy_interface_mode_is_rgmii(port->phy_interface) ||
            port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                val = readl(port->base + MVPP22_GMAC_INT_MASK);
                val |= MVPP22_GMAC_INT_MASK_LINK_STAT;
                writel(val, port->base + MVPP22_GMAC_INT_MASK);
        }

        if (port->gop_id == 0) {
                val = readl(port->base + MVPP22_XLG_INT_MASK);
                val |= MVPP22_XLG_INT_MASK_LINK;
                writel(val, port->base + MVPP22_XLG_INT_MASK);
        }

        mvpp22_gop_unmask_irq(port);
}

static int mvpp22_comphy_init(struct mvpp2_port *port)
{
        enum phy_mode mode;
        int ret;

        if (!port->comphy)
                return 0;

        switch (port->phy_interface) {
        case PHY_INTERFACE_MODE_SGMII:
                mode = PHY_MODE_SGMII;
                break;
        case PHY_INTERFACE_MODE_10GKR:
                mode = PHY_MODE_10GKR;
                break;
        default:
                return -EINVAL;
        }

        ret = phy_set_mode(port->comphy, mode);
        if (ret)
                return ret;

        return phy_power_on(port->comphy);
}

static void mvpp2_port_mii_gmac_configure_mode(struct mvpp2_port *port)
{
        u32 val;

        if (port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                val = readl(port->base + MVPP22_GMAC_CTRL_4_REG);
                val |= MVPP22_CTRL4_SYNC_BYPASS_DIS | MVPP22_CTRL4_DP_CLK_SEL |
                       MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE;
                val &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL;
                writel(val, port->base + MVPP22_GMAC_CTRL_4_REG);
        } else if (phy_interface_mode_is_rgmii(port->phy_interface)) {
                val = readl(port->base + MVPP22_GMAC_CTRL_4_REG);
                val |= MVPP22_CTRL4_EXT_PIN_GMII_SEL |
                       MVPP22_CTRL4_SYNC_BYPASS_DIS |
                       MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE;
                val &= ~MVPP22_CTRL4_DP_CLK_SEL;
                writel(val, port->base + MVPP22_GMAC_CTRL_4_REG);
        }

        /* The port is connected to a copper PHY */
        val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
        val &= ~MVPP2_GMAC_PORT_TYPE_MASK;
        writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);

        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
        val |= MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS |
               MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_FLOW_CTRL_AUTONEG |
               MVPP2_GMAC_AN_DUPLEX_EN;
        if (port->phy_interface == PHY_INTERFACE_MODE_SGMII)
                val |= MVPP2_GMAC_IN_BAND_AUTONEG;
        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
}

static void mvpp2_port_mii_gmac_configure(struct mvpp2_port *port)
{
        u32 val;

        /* Force link down */
        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
        val &= ~MVPP2_GMAC_FORCE_LINK_PASS;
        val |= MVPP2_GMAC_FORCE_LINK_DOWN;
        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);

        /* Set the GMAC in a reset state */
        val = readl(port->base + MVPP2_GMAC_CTRL_2_REG);
        val |= MVPP2_GMAC_PORT_RESET_MASK;
        writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);

        /* Configure the PCS and in-band AN */
        val = readl(port->base + MVPP2_GMAC_CTRL_2_REG);
        if (port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                val |= MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK;
        } else if (phy_interface_mode_is_rgmii(port->phy_interface)) {
                val &= ~MVPP2_GMAC_PCS_ENABLE_MASK;
        }
        writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);

        mvpp2_port_mii_gmac_configure_mode(port);

        /* Unset the GMAC reset state */
        val = readl(port->base + MVPP2_GMAC_CTRL_2_REG);
        val &= ~MVPP2_GMAC_PORT_RESET_MASK;
        writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);

        /* Stop forcing link down */
        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
        val &= ~MVPP2_GMAC_FORCE_LINK_DOWN;
        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
}

static void mvpp2_port_mii_xlg_configure(struct mvpp2_port *port)
{
        u32 val;

        if (port->gop_id != 0)
                return;

        val = readl(port->base + MVPP22_XLG_CTRL0_REG);
        val |= MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN;
        writel(val, port->base + MVPP22_XLG_CTRL0_REG);

        val = readl(port->base + MVPP22_XLG_CTRL4_REG);
        val &= ~MVPP22_XLG_CTRL4_MACMODSELECT_GMAC;
        val |= MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC;
        writel(val, port->base + MVPP22_XLG_CTRL4_REG);
}

static void mvpp22_port_mii_set(struct mvpp2_port *port)
{
        u32 val;

        /* Only GOP port 0 has an XLG MAC */
        if (port->gop_id == 0) {
                val = readl(port->base + MVPP22_XLG_CTRL3_REG);
                val &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK;

                if (port->phy_interface == PHY_INTERFACE_MODE_XAUI ||
                    port->phy_interface == PHY_INTERFACE_MODE_10GKR)
                        val |= MVPP22_XLG_CTRL3_MACMODESELECT_10G;
                else
                        val |= MVPP22_XLG_CTRL3_MACMODESELECT_GMAC;

                writel(val, port->base + MVPP22_XLG_CTRL3_REG);
        }
}

static void mvpp2_port_mii_set(struct mvpp2_port *port)
{
        if (port->priv->hw_version == MVPP22)
                mvpp22_port_mii_set(port);

        if (phy_interface_mode_is_rgmii(port->phy_interface) ||
            port->phy_interface == PHY_INTERFACE_MODE_SGMII)
                mvpp2_port_mii_gmac_configure(port);
        else if (port->phy_interface == PHY_INTERFACE_MODE_10GKR)
                mvpp2_port_mii_xlg_configure(port);
}

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;

        /* Only GOP port 0 has an XLG MAC */
        if (port->gop_id == 0 &&
            (port->phy_interface == PHY_INTERFACE_MODE_XAUI ||
             port->phy_interface == PHY_INTERFACE_MODE_10GKR)) {
                val = readl(port->base + MVPP22_XLG_CTRL0_REG);
                val |= MVPP22_XLG_CTRL0_PORT_EN |
                       MVPP22_XLG_CTRL0_MAC_RESET_DIS;
                val &= ~MVPP22_XLG_CTRL0_MIB_CNT_DIS;
                writel(val, port->base + MVPP22_XLG_CTRL0_REG);
        } else {
                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;

        /* Only GOP port 0 has an XLG MAC */
        if (port->gop_id == 0 &&
            (port->phy_interface == PHY_INTERFACE_MODE_XAUI ||
             port->phy_interface == PHY_INTERFACE_MODE_10GKR)) {
                val = readl(port->base + MVPP22_XLG_CTRL0_REG);
                val &= ~(MVPP22_XLG_CTRL0_PORT_EN |
                         MVPP22_XLG_CTRL0_MAC_RESET_DIS);
                writel(val, port->base + MVPP22_XLG_CTRL0_REG);
        } else {
                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);
}

struct mvpp2_ethtool_counter {
        unsigned int offset;
        const char string[ETH_GSTRING_LEN];
        bool reg_is_64b;
};

static u64 mvpp2_read_count(struct mvpp2_port *port,
                            const struct mvpp2_ethtool_counter *counter)
{
        u64 val;

        val = readl(port->stats_base + counter->offset);
        if (counter->reg_is_64b)
                val += (u64)readl(port->stats_base + counter->offset + 4) << 32;

        return val;
}

/* Due to the fact that software statistics and hardware statistics are, by
 * design, incremented at different moments in the chain of packet processing,
 * it is very likely that incoming packets could have been dropped after being
 * counted by hardware but before reaching software statistics (most probably
 * multicast packets), and in the oppposite way, during transmission, FCS bytes
 * are added in between as well as TSO skb will be split and header bytes added.
 * Hence, statistics gathered from userspace with ifconfig (software) and
 * ethtool (hardware) cannot be compared.
 */
static const struct mvpp2_ethtool_counter mvpp2_ethtool_regs[] = {
        { MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true },
        { MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" },
        { MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" },
        { MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" },
        { MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" },
        { MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" },
        { MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" },
        { MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" },
        { MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" },
        { MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" },
        { MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" },
        { MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" },
        { MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true },
        { MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" },
        { MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" },
        { MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" },
        { MVPP2_MIB_FC_SENT, "fc_sent" },
        { MVPP2_MIB_FC_RCVD, "fc_received" },
        { MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" },
        { MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" },
        { MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" },
        { MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" },
        { MVPP2_MIB_JABBER_RCVD, "jabber_received" },
        { MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" },
        { MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" },
        { MVPP2_MIB_COLLISION, "collision" },
        { MVPP2_MIB_LATE_COLLISION, "late_collision" },
};

static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset,
                                      u8 *data)
{
        if (sset == ETH_SS_STATS) {
                int i;

                for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++)
                        memcpy(data + i * ETH_GSTRING_LEN,
                               &mvpp2_ethtool_regs[i].string, ETH_GSTRING_LEN);
        }
}

static void mvpp2_gather_hw_statistics(struct work_struct *work)
{
        struct delayed_work *del_work = to_delayed_work(work);
        struct mvpp2_port *port = container_of(del_work, struct mvpp2_port,
                                               stats_work);
        u64 *pstats;
        int i;

        mutex_lock(&port->gather_stats_lock);

        pstats = port->ethtool_stats;
        for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++)
                *pstats++ += mvpp2_read_count(port, &mvpp2_ethtool_regs[i]);

        /* No need to read again the counters right after this function if it
         * was called asynchronously by the user (ie. use of ethtool).
         */
        cancel_delayed_work(&port->stats_work);
        queue_delayed_work(port->priv->stats_queue, &port->stats_work,
                           MVPP2_MIB_COUNTERS_STATS_DELAY);

        mutex_unlock(&port->gather_stats_lock);
}

static void mvpp2_ethtool_get_stats(struct net_device *dev,
                                    struct ethtool_stats *stats, u64 *data)
{
        struct mvpp2_port *port = netdev_priv(dev);

        /* Update statistics for the given port, then take the lock to avoid
         * concurrent accesses on the ethtool_stats structure during its copy.
         */
        mvpp2_gather_hw_statistics(&port->stats_work.work);

        mutex_lock(&port->gather_stats_lock);
        memcpy(data, port->ethtool_stats,
               sizeof(u64) * ARRAY_SIZE(mvpp2_ethtool_regs));
        mutex_unlock(&port->gather_stats_lock);
}

static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset)
{
        if (sset == ETH_SS_STATS)
                return ARRAY_SIZE(mvpp2_ethtool_regs);

        return -EOPNOTSUPP;
}

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

        /* Read the GOP statistics to reset the hardware counters */
        for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_regs); i++)
                mvpp2_read_count(port, &mvpp2_ethtool_regs[i]);

        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);
}

/* Change maximum receive size of the port */
static inline void mvpp2_xlg_max_rx_size_set(struct mvpp2_port *port)
{
        u32 val;

        val =  readl(port->base + MVPP22_XLG_CTRL1_REG);
        val &= ~MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK;
        val |= ((port->pkt_size - MVPP2_MH_SIZE) / 2) <<
               MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS;
        writel(val, port->base + MVPP22_XLG_CTRL1_REG);
}

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

        if (port->priv->hw_version == MVPP21) {
                /* 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,
                    port->priv->tclk / USEC_PER_SEC);
        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 < port->nrxqs; 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);
        }

        /* At default, mask all interrupts to all present cpus */
        mvpp2_interrupts_disable(port);
}

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

        for (lrxq = 0; lrxq < port->nrxqs; 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 < port->nrxqs; 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 < port->ntxqs; queue++) {
                struct mvpp2_tx_queue *txq = port->txqs[queue];

                if (txq->descs)
                        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);
}

/* Tx descriptors helper methods */

/* 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
 *
 * Called only from mvpp2_tx(), so migration is disabled, using
 * smp_processor_id() is OK.
 */
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_percpu_write(port->priv, smp_processor_id(),
                           MVPP2_AGGR_TXQ_UPDATE_REG, pending);
}


/* Check if there are enough free descriptors in aggregated txq.
 * If not, update the number of occupied descriptors and repeat the check.
 *
 * Called only from mvpp2_tx(), so migration is disabled, using
 * smp_processor_id() is OK.
 */
static int mvpp2_aggr_desc_num_check(struct mvpp2 *priv,
                                     struct mvpp2_tx_queue *aggr_txq, int num)
{
        if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) {
                /* Update number of occupied aggregated Tx descriptors */
                int cpu = smp_processor_id();
                u32 val = mvpp2_read(priv, MVPP2_AGGR_TXQ_STATUS_REG(cpu));

                aggr_txq->count = val & MVPP2_AGGR_TXQ_PENDING_MASK;
        }

        if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE)
                return -ENOMEM;

        return 0;
}

/* Reserved Tx descriptors allocation request
 *
 * Called only from mvpp2_txq_reserved_desc_num_proc(), itself called
 * only by mvpp2_tx(), so migration is disabled, using
 * smp_processor_id() is OK.
 */
static int mvpp2_txq_alloc_reserved_desc(struct mvpp2 *priv,
                                         struct mvpp2_tx_queue *txq, int num)
{
        u32 val;
        int cpu = smp_processor_id();

        val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num;
        mvpp2_percpu_write(priv, cpu, MVPP2_TXQ_RSVD_REQ_REG, val);

        val = mvpp2_percpu_read(priv, cpu, MVPP2_TXQ_RSVD_RSLT_REG);

        return val & MVPP2_TXQ_RSVD_RSLT_MASK;
}

/* Check if there are enough reserved descriptors for transmission.
 * If not, request chunk of reserved descriptors and check again.
 */
static int mvpp2_txq_reserved_desc_num_proc(struct mvpp2 *priv,
                                            struct mvpp2_tx_queue *txq,
                                            struct mvpp2_txq_pcpu *txq_pcpu,
                                            int num)
{
        int req, cpu, desc_count;

        if (txq_pcpu->reserved_num >= num)
                return 0;

        /* Not enough descriptors reserved! Update the reserved descriptor
         * count and check again.
         */

        desc_count = 0;
        /* Compute total of used descriptors */
        for_each_present_cpu(cpu) {
                struct mvpp2_txq_pcpu *txq_pcpu_aux;

                txq_pcpu_aux = per_cpu_ptr(txq->pcpu, cpu);
                desc_count += txq_pcpu_aux->count;
                desc_count += txq_pcpu_aux->reserved_num;
        }

        req = max(MVPP2_CPU_DESC_CHUNK, num - txq_pcpu->reserved_num);
        desc_count += req;

        if (desc_count >
           (txq->size - (num_present_cpus() * MVPP2_CPU_DESC_CHUNK)))
                return -ENOMEM;

        txq_pcpu->reserved_num += mvpp2_txq_alloc_reserved_desc(priv, txq, req);

        /* OK, the descriptor cound has been updated: check again. */
        if (txq_pcpu->reserved_num < num)
                return -ENOMEM;
        return 0;
}

/* Release the last allocated Tx descriptor. Useful to handle DMA
 * mapping failures in the Tx path.
 */
static void mvpp2_txq_desc_put(struct mvpp2_tx_queue *txq)
{
        if (txq->next_desc_to_proc == 0)
                txq->next_desc_to_proc = txq->last_desc - 1;
        else
                txq->next_desc_to_proc--;
}

/* Set Tx descriptors fields relevant for CSUM calculation */
static u32 mvpp2_txq_desc_csum(int l3_offs, int l3_proto,
                               int ip_hdr_len, int l4_proto)
{
        u32 command;

        /* fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk,
         * G_L4_chk, L4_type required only for checksum calculation
         */
        command = (l3_offs << MVPP2_TXD_L3_OFF_SHIFT);
        command |= (ip_hdr_len << MVPP2_TXD_IP_HLEN_SHIFT);
        command |= MVPP2_TXD_IP_CSUM_DISABLE;

        if (l3_proto == swab16(ETH_P_IP)) {
                command &= ~MVPP2_TXD_IP_CSUM_DISABLE;  /* enable IPv4 csum */
                command &= ~MVPP2_TXD_L3_IP6;           /* enable IPv4 */
        } else {
                command |= MVPP2_TXD_L3_IP6;            /* enable IPv6 */
        }

        if (l4_proto == IPPROTO_TCP) {
                command &= ~MVPP2_TXD_L4_UDP;           /* enable TCP */
                command &= ~MVPP2_TXD_L4_CSUM_FRAG;     /* generate L4 csum */
        } else if (l4_proto == IPPROTO_UDP) {
                command |= MVPP2_TXD_L4_UDP;            /* enable UDP */
                command &= ~MVPP2_TXD_L4_CSUM_FRAG;     /* generate L4 csum */
        } else {
                command |= MVPP2_TXD_L4_CSUM_NOT;
        }

        return command;
}

/* Get number of sent descriptors and decrement counter.
 * The number of sent descriptors is returned.
 * Per-CPU access
 *
 * Called only from mvpp2_txq_done(), called from mvpp2_tx()
 * (migration disabled) and from the TX completion tasklet (migration
 * disabled) so using smp_processor_id() is OK.
 */
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_percpu_read(port->priv, smp_processor_id(),
                                MVPP2_TXQ_SENT_REG(txq->id));

        return (val & MVPP2_TRANSMITTED_COUNT_MASK) >>
                MVPP2_TRANSMITTED_COUNT_OFFSET;
}

/* Called through on_each_cpu(), so runs on all CPUs, with migration
 * disabled, therefore using smp_processor_id() is OK.
 */
static void mvpp2_txq_sent_counter_clear(void *arg)
{
        struct mvpp2_port *port = arg;
        int queue;

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

                mvpp2_percpu_read(port->priv, smp_processor_id(),
                                  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 < port->ntxqs; 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);
                }
        }
}

/* Set the number of packets that will be received before Rx interrupt
 * will be generated by HW.
 */
static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port,
                                   struct mvpp2_rx_queue *rxq)
{
        int cpu = get_cpu();

        if (rxq->pkts_coal > MVPP2_OCCUPIED_THRESH_MASK)
                rxq->pkts_coal = MVPP2_OCCUPIED_THRESH_MASK;

        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_NUM_REG, rxq->id);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_THRESH_REG,
                           rxq->pkts_coal);

        put_cpu();
}

/* For some reason in the LSP this is done on each CPU. Why ? */
static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port,
                                   struct mvpp2_tx_queue *txq)
{
        int cpu = get_cpu();
        u32 val;

        if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK)
                txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK;

        val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_THRESH_REG, val);

        put_cpu();
}

static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz)
{
        u64 tmp = (u64)clk_hz * usec;

        do_div(tmp, USEC_PER_SEC);

        return tmp > U32_MAX ? U32_MAX : tmp;
}

static u32 mvpp2_cycles_to_usec(u32 cycles, unsigned long clk_hz)
{
        u64 tmp = (u64)cycles * USEC_PER_SEC;

        do_div(tmp, clk_hz);

        return tmp > U32_MAX ? U32_MAX : tmp;
}

/* Set the time delay in usec before Rx interrupt */
static void mvpp2_rx_time_coal_set(struct mvpp2_port *port,
                                   struct mvpp2_rx_queue *rxq)
{
        unsigned long freq = port->priv->tclk;
        u32 val = mvpp2_usec_to_cycles(rxq->time_coal, freq);

        if (val > MVPP2_MAX_ISR_RX_THRESHOLD) {
                rxq->time_coal =
                        mvpp2_cycles_to_usec(MVPP2_MAX_ISR_RX_THRESHOLD, freq);

                /* re-evaluate to get actual register value */
                val = mvpp2_usec_to_cycles(rxq->time_coal, freq);
        }

        mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val);
}

static void mvpp2_tx_time_coal_set(struct mvpp2_port *port)
{
        unsigned long freq = port->priv->tclk;
        u32 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq);

        if (val > MVPP2_MAX_ISR_TX_THRESHOLD) {
                port->tx_time_coal =
                        mvpp2_cycles_to_usec(MVPP2_MAX_ISR_TX_THRESHOLD, freq);

                /* re-evaluate to get actual register value */
                val = mvpp2_usec_to_cycles(port->tx_time_coal, freq);
        }

        mvpp2_write(port->priv, MVPP2_ISR_TX_THRESHOLD_REG(port->id), 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++) {
                struct mvpp2_txq_pcpu_buf *tx_buf =
                        txq_pcpu->buffs + txq_pcpu->txq_get_index;

                if (!IS_TSO_HEADER(txq_pcpu, tx_buf->dma))
                        dma_unmap_single(port->dev->dev.parent, tx_buf->dma,
                                         tx_buf->size, DMA_TO_DEVICE);
                if (tx_buf->skb)
                        dev_kfree_skb_any(tx_buf->skb);

                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];
}

/* Handle end of transmission */
static void mvpp2_txq_done(struct mvpp2_port *port, struct mvpp2_tx_queue *txq,
                           struct mvpp2_txq_pcpu *txq_pcpu)
{
        struct netdev_queue *nq = netdev_get_tx_queue(port->dev, txq->log_id);
        int tx_done;

        if (txq_pcpu->cpu != smp_processor_id())
                netdev_err(port->dev, "wrong cpu on the end of Tx processing\n");

        tx_done = mvpp2_txq_sent_desc_proc(port, txq);
        if (!tx_done)
                return;
        mvpp2_txq_bufs_free(port, txq, txq_pcpu, tx_done);

        txq_pcpu->count -= tx_done;

        if (netif_tx_queue_stopped(nq))
                if (txq_pcpu->count <= txq_pcpu->wake_threshold)
                        netif_tx_wake_queue(nq);
}

static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause,
                                  int cpu)
{
        struct mvpp2_tx_queue *txq;
        struct mvpp2_txq_pcpu *txq_pcpu;
        unsigned int tx_todo = 0;

        while (cause) {
                txq = mvpp2_get_tx_queue(port, cause);
                if (!txq)
                        break;

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

                if (txq_pcpu->count) {
                        mvpp2_txq_done(port, txq, txq_pcpu);
                        tx_todo += txq_pcpu->count;
                }

                cause &= ~(1 << txq->log_id);
        }
        return tx_todo;
}

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

/* Allocate and initialize descriptors for aggr TXQ */
static int mvpp2_aggr_txq_init(struct platform_device *pdev,
                               struct mvpp2_tx_queue *aggr_txq, int cpu,
                               struct mvpp2 *priv)
{
        u32 txq_dma;

        /* Allocate memory for TX descriptors */
        aggr_txq->descs = dma_zalloc_coherent(&pdev->dev,
                                MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE,
                                &aggr_txq->descs_dma, GFP_KERNEL);
        if (!aggr_txq->descs)
                return -ENOMEM;

        aggr_txq->last_desc = MVPP2_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
         */
        if (priv->hw_version == MVPP21)
                txq_dma = aggr_txq->descs_dma;
        else
                txq_dma = aggr_txq->descs_dma >>
                        MVPP22_AGGR_TXQ_DESC_ADDR_OFFS;

        mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(cpu), txq_dma);
        mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(cpu),
                    MVPP2_AGGR_TXQ_SIZE);

        return 0;
}

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

{
        u32 rxq_dma;
        int cpu;

        rxq->size = port->rx_ring_size;

        /* Allocate memory for RX descriptors */
        rxq->descs = dma_alloc_coherent(port->dev->dev.parent,
                                        rxq->size * MVPP2_DESC_ALIGNED_SIZE,
                                        &rxq->descs_dma, GFP_KERNEL);
        if (!rxq->descs)
                return -ENOMEM;

        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 */
        cpu = get_cpu();
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_NUM_REG, rxq->id);
        if (port->priv->hw_version == MVPP21)
                rxq_dma = rxq->descs_dma;
        else
                rxq_dma = rxq->descs_dma >> MVPP22_DESC_ADDR_OFFS;
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_ADDR_REG, rxq_dma);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_SIZE_REG, rxq->size);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_INDEX_REG, 0);
        put_cpu();

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

        /* Set coalescing pkts and time */
        mvpp2_rx_pkts_coal_set(port, rxq);
        mvpp2_rx_time_coal_set(port, rxq);

        /* 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 status = mvpp2_rxdesc_status_get(port, rx_desc);
                int pool;

                pool = (status & MVPP2_RXD_BM_POOL_ID_MASK) >>
                        MVPP2_RXD_BM_POOL_ID_OFFS;

                mvpp2_bm_pool_put(port, pool,
                                  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)
{
        int cpu;

        mvpp2_rxq_drop_pkts(port, rxq);

        if (rxq->descs)
                dma_free_coherent(port->dev->dev.parent,
                                  rxq->size * MVPP2_DESC_ALIGNED_SIZE,
                                  rxq->descs,
                                  rxq->descs_dma);

        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);
        cpu = get_cpu();
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_NUM_REG, rxq->id);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_ADDR_REG, 0);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_RXQ_DESC_SIZE_REG, 0);
        put_cpu();
}

/* 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 = dma_alloc_coherent(port->dev->dev.parent,
                                txq->size * MVPP2_DESC_ALIGNED_SIZE,
                                &txq->descs_dma, GFP_KERNEL);
        if (!txq->descs)
                return -ENOMEM;

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

        /* Set Tx descriptors queue starting address - indirect access */
        cpu = get_cpu();
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_ADDR_REG,
                           txq->descs_dma);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_SIZE_REG,
                           txq->size & MVPP2_TXQ_DESC_SIZE_MASK);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_INDEX_REG, 0);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_RSVD_CLR_REG,
                           txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET);
        val = mvpp2_percpu_read(port->priv, cpu, MVPP2_TXQ_PENDING_REG);
        val &= ~MVPP2_TXQ_PENDING_MASK;
        mvpp2_percpu_write(port->priv, cpu, 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_percpu_write(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG,
                           MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 |
                           MVPP2_PREF_BUF_THRESH(desc_per_txq / 2));
        put_cpu();

        /* 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;
                txq_pcpu->buffs = kmalloc_array(txq_pcpu->size,
                                                sizeof(*txq_pcpu->buffs),
                                                GFP_KERNEL);
                if (!txq_pcpu->buffs)
                        return -ENOMEM;

                txq_pcpu->count = 0;
                txq_pcpu->reserved_num = 0;
                txq_pcpu->txq_put_index = 0;
                txq_pcpu->txq_get_index = 0;
                txq_pcpu->tso_headers = NULL;

                txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS;
                txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2;

                txq_pcpu->tso_headers =
                        dma_alloc_coherent(port->dev->dev.parent,
                                           txq_pcpu->size * TSO_HEADER_SIZE,
                                           &txq_pcpu->tso_headers_dma,
                                           GFP_KERNEL);
                if (!txq_pcpu->tso_headers)
                        return -ENOMEM;
        }

        return 0;
}

/* Free allocated TXQ resources */
static void mvpp2_txq_deinit(struct mvpp2_port *port,
                             struct mvpp2_tx_queue *txq)
{
        struct mvpp2_txq_pcpu *txq_pcpu;
        int cpu;

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

                if (txq_pcpu->tso_headers)
                        dma_free_coherent(port->dev->dev.parent,
                                          txq_pcpu->size * TSO_HEADER_SIZE,
                                          txq_pcpu->tso_headers,
                                          txq_pcpu->tso_headers_dma);

                txq_pcpu->tso_headers = NULL;
        }

        if (txq->descs)
                dma_free_coherent(port->dev->dev.parent,
                                  txq->size * MVPP2_DESC_ALIGNED_SIZE,
                                  txq->descs, txq->descs_dma);

        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 */
        cpu = get_cpu();
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_ADDR_REG, 0);
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_DESC_SIZE_REG, 0);
        put_cpu();
}

/* 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;

        cpu = get_cpu();
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_NUM_REG, txq->id);
        val = mvpp2_percpu_read(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG);
        val |= MVPP2_TXQ_DRAIN_EN_MASK;
        mvpp2_percpu_write(port->priv, cpu, 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_percpu_read(port->priv, cpu,
                                            MVPP2_TXQ_PENDING_REG);
                pending &= MVPP2_TXQ_PENDING_MASK;
        } while (pending);

        val &= ~MVPP2_TXQ_DRAIN_EN_MASK;
        mvpp2_percpu_write(port->priv, cpu, MVPP2_TXQ_PREF_BUF_REG, val);
        put_cpu();

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

        on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1);

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

        if (port->has_tx_irqs) {
                mvpp2_tx_time_coal_set(port);
                for (queue = 0; queue < port->ntxqs; queue++) {
                        txq = port->txqs[queue];
                        mvpp2_tx_pkts_coal_set(port, txq);
                }
        }

        on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1);
        return 0;

err_cleanup:
        mvpp2_cleanup_txqs(port);
        return err;
}

/* The callback for per-port interrupt */
static irqreturn_t mvpp2_isr(int irq, void *dev_id)
{
        struct mvpp2_queue_vector *qv = dev_id;

        mvpp2_qvec_interrupt_disable(qv);

        napi_schedule(&qv->napi);

        return IRQ_HANDLED;
}

/* Per-port interrupt for link status changes */
static irqreturn_t mvpp2_link_status_isr(int irq, void *dev_id)
{
        struct mvpp2_port *port = (struct mvpp2_port *)dev_id;
        struct net_device *dev = port->dev;
        bool event = false, link = false;
        u32 val;

        mvpp22_gop_mask_irq(port);

        if (port->gop_id == 0 &&
            port->phy_interface == PHY_INTERFACE_MODE_10GKR) {
                val = readl(port->base + MVPP22_XLG_INT_STAT);
                if (val & MVPP22_XLG_INT_STAT_LINK) {
                        event = true;
                        val = readl(port->base + MVPP22_XLG_STATUS);
                        if (val & MVPP22_XLG_STATUS_LINK_UP)
                                link = true;
                }
        } else if (phy_interface_mode_is_rgmii(port->phy_interface) ||
                   port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                val = readl(port->base + MVPP22_GMAC_INT_STAT);
                if (val & MVPP22_GMAC_INT_STAT_LINK) {
                        event = true;
                        val = readl(port->base + MVPP2_GMAC_STATUS0);
                        if (val & MVPP2_GMAC_STATUS0_LINK_UP)
                                link = true;
                }
        }

        if (!netif_running(dev) || !event)
                goto handled;

        if (link) {
                mvpp2_interrupts_enable(port);

                mvpp2_egress_enable(port);
                mvpp2_ingress_enable(port);
                netif_carrier_on(dev);
                netif_tx_wake_all_queues(dev);
        } else {
                netif_tx_stop_all_queues(dev);
                netif_carrier_off(dev);
                mvpp2_ingress_disable(port);
                mvpp2_egress_disable(port);

                mvpp2_interrupts_disable(port);
        }

handled:
        mvpp22_gop_unmask_irq(port);
        return IRQ_HANDLED;
}

static void mvpp2_gmac_set_autoneg(struct mvpp2_port *port,
                                   struct phy_device *phydev)
{
        u32 val;

        if (port->phy_interface != PHY_INTERFACE_MODE_RGMII &&
            port->phy_interface != PHY_INTERFACE_MODE_RGMII_ID &&
            port->phy_interface != PHY_INTERFACE_MODE_RGMII_RXID &&
            port->phy_interface != PHY_INTERFACE_MODE_RGMII_TXID &&
            port->phy_interface != PHY_INTERFACE_MODE_SGMII)
                return;

        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);
}

/* Adjust link */
static void mvpp2_link_event(struct net_device *dev)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct phy_device *phydev = dev->phydev;
        bool link_reconfigured = false;
        u32 val;

        if (phydev->link) {
                if (port->phy_interface != phydev->interface && port->comphy) {
                        /* disable current port for reconfiguration */
                        mvpp2_interrupts_disable(port);
                        netif_carrier_off(port->dev);
                        mvpp2_port_disable(port);
                        phy_power_off(port->comphy);

                        /* comphy reconfiguration */
                        port->phy_interface = phydev->interface;
                        mvpp22_comphy_init(port);

                        /* gop/mac reconfiguration */
                        mvpp22_gop_init(port);
                        mvpp2_port_mii_set(port);

                        link_reconfigured = true;
                }

                if ((port->speed != phydev->speed) ||
                    (port->duplex != phydev->duplex)) {
                        mvpp2_gmac_set_autoneg(port, phydev);

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

        if (phydev->link != port->link || link_reconfigured) {
                port->link = phydev->link;

                if (phydev->link) {
                        if (port->phy_interface == PHY_INTERFACE_MODE_RGMII ||
                            port->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
                            port->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID ||
                            port->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID ||
                            port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
                                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_interrupts_enable(port);
                        mvpp2_port_enable(port);

                        mvpp2_egress_enable(port);
                        mvpp2_ingress_enable(port);
                        netif_carrier_on(dev);
                        netif_tx_wake_all_queues(dev);
                } else {
                        port->duplex = -1;
                        port->speed = 0;

                        netif_tx_stop_all_queues(dev);
                        netif_carrier_off(dev);
                        mvpp2_ingress_disable(port);
                        mvpp2_egress_disable(port);

                        mvpp2_port_disable(port);
                        mvpp2_interrupts_disable(port);
                }

                phy_print_status(phydev);
        }
}

static void mvpp2_timer_set(struct mvpp2_port_pcpu *port_pcpu)
{
        ktime_t interval;

        if (!port_pcpu->timer_scheduled) {
                port_pcpu->timer_scheduled = true;
                interval = MVPP2_TXDONE_HRTIMER_PERIOD_NS;
                hrtimer_start(&port_pcpu->tx_done_timer, interval,
                              HRTIMER_MODE_REL_PINNED);
        }
}

static void mvpp2_tx_proc_cb(unsigned long data)
{
        struct net_device *dev = (struct net_device *)data;
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2_port_pcpu *port_pcpu = this_cpu_ptr(port->pcpu);
        unsigned int tx_todo, cause;

        if (!netif_running(dev))
                return;
        port_pcpu->timer_scheduled = false;

        /* Process all the Tx queues */
        cause = (1 << port->ntxqs) - 1;
        tx_todo = mvpp2_tx_done(port, cause, smp_processor_id());

        /* Set the timer in case not all the packets were processed */
        if (tx_todo)
                mvpp2_timer_set(port_pcpu);
}

static enum hrtimer_restart mvpp2_hr_timer_cb(struct hrtimer *timer)
{
        struct mvpp2_port_pcpu *port_pcpu = container_of(timer,
                                                         struct mvpp2_port_pcpu,
                                                         tx_done_timer);

        tasklet_schedule(&port_pcpu->tx_done_tasklet);

        return HRTIMER_NORESTART;
}

/* 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;
        }
}

/* Handle RX checksum offload */
static void mvpp2_rx_csum(struct mvpp2_port *port, u32 status,
                          struct sk_buff *skb)
{
        if (((status & MVPP2_RXD_L3_IP4) &&
             !(status & MVPP2_RXD_IP4_HEADER_ERR)) ||
            (status & MVPP2_RXD_L3_IP6))
                if (((status & MVPP2_RXD_L4_UDP) ||
                     (status & MVPP2_RXD_L4_TCP)) &&
                     (status & MVPP2_RXD_L4_CSUM_OK)) {
                        skb->csum = 0;
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
                        return;
                }

        skb->ip_summed = CHECKSUM_NONE;
}

/* 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, int pool)
{
        dma_addr_t dma_addr;
        phys_addr_t phys_addr;
        void *buf;

        /* No recycle or too many buffers are in use, so allocate a new skb */
        buf = mvpp2_buf_alloc(port, bm_pool, &dma_addr, &phys_addr,
                              GFP_ATOMIC);
        if (!buf)
                return -ENOMEM;

        mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr);

        return 0;
}

/* Handle tx checksum */
static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb)
{
        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                int ip_hdr_len = 0;
                u8 l4_proto;

                if (skb->protocol == htons(ETH_P_IP)) {
                        struct iphdr *ip4h = ip_hdr(skb);

                        /* Calculate IPv4 checksum and L4 checksum */
                        ip_hdr_len = ip4h->ihl;
                        l4_proto = ip4h->protocol;
                } else if (skb->protocol == htons(ETH_P_IPV6)) {
                        struct ipv6hdr *ip6h = ipv6_hdr(skb);

                        /* Read l4_protocol from one of IPv6 extra headers */
                        if (skb_network_header_len(skb) > 0)
                                ip_hdr_len = (skb_network_header_len(skb) >> 2);
                        l4_proto = ip6h->nexthdr;
                } else {
                        return MVPP2_TXD_L4_CSUM_NOT;
                }

                return mvpp2_txq_desc_csum(skb_network_offset(skb),
                                skb->protocol, ip_hdr_len, l4_proto);
        }

        return MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE;
}

/* Main rx processing */
static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
                    int rx_todo, struct mvpp2_rx_queue *rxq)
{
        struct net_device *dev = port->dev;
        int rx_received;
        int rx_done = 0;
        u32 rcvd_pkts = 0;
        u32 rcvd_bytes = 0;

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

        while (rx_done < rx_todo) {
                struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq);
                struct mvpp2_bm_pool *bm_pool;
                struct sk_buff *skb;
                unsigned int frag_size;
                dma_addr_t dma_addr;
                phys_addr_t phys_addr;
                u32 rx_status;
                int pool, rx_bytes, err;
                void *data;

                rx_done++;
                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);
                phys_addr = mvpp2_rxdesc_cookie_get(port, rx_desc);
                data = (void *)phys_to_virt(phys_addr);

                pool = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >>
                        MVPP2_RXD_BM_POOL_ID_OFFS;
                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) {
err_drop_frame:
                        dev->stats.rx_errors++;
                        mvpp2_rx_error(port, rx_desc);
                        /* Return the buffer to the pool */
                        mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr);
                        continue;
                }

                if (bm_pool->frag_size > PAGE_SIZE)
                        frag_size = 0;
                else
                        frag_size = bm_pool->frag_size;

                skb = build_skb(data, frag_size);
                if (!skb) {
                        netdev_warn(port->dev, "skb build failed\n");
                        goto err_drop_frame;
                }

                err = mvpp2_rx_refill(port, bm_pool, pool);
                if (err) {
                        netdev_err(port->dev, "failed to refill BM pools\n");
                        goto err_drop_frame;
                }

                dma_unmap_single(dev->dev.parent, dma_addr,
                                 bm_pool->buf_size, DMA_FROM_DEVICE);

                rcvd_pkts++;
                rcvd_bytes += rx_bytes;

                skb_reserve(skb, MVPP2_MH_SIZE + NET_SKB_PAD);
                skb_put(skb, rx_bytes);
                skb->protocol = eth_type_trans(skb, dev);
                mvpp2_rx_csum(port, rx_status, skb);

                napi_gro_receive(napi, skb);
        }

        if (rcvd_pkts) {
                struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);

                u64_stats_update_begin(&stats->syncp);
                stats->rx_packets += rcvd_pkts;
                stats->rx_bytes   += rcvd_bytes;
                u64_stats_update_end(&stats->syncp);
        }

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

        return rx_todo;
}

static inline void
tx_desc_unmap_put(struct mvpp2_port *port, struct mvpp2_tx_queue *txq,
                  struct mvpp2_tx_desc *desc)
{
        struct mvpp2_txq_pcpu *txq_pcpu = this_cpu_ptr(txq->pcpu);

        dma_addr_t buf_dma_addr =
                mvpp2_txdesc_dma_addr_get(port, desc);
        size_t buf_sz =
                mvpp2_txdesc_size_get(port, desc);
        if (!IS_TSO_HEADER(txq_pcpu, buf_dma_addr))
                dma_unmap_single(port->dev->dev.parent, buf_dma_addr,
                                 buf_sz, DMA_TO_DEVICE);
        mvpp2_txq_desc_put(txq);
}

/* Handle tx fragmentation processing */
static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb,
                                 struct mvpp2_tx_queue *aggr_txq,
                                 struct mvpp2_tx_queue *txq)
{
        struct mvpp2_txq_pcpu *txq_pcpu = this_cpu_ptr(txq->pcpu);
        struct mvpp2_tx_desc *tx_desc;
        int i;
        dma_addr_t buf_dma_addr;

        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
                void *addr = page_address(frag->page.p) + frag->page_offset;

                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, frag->size);

                buf_dma_addr = dma_map_single(port->dev->dev.parent, addr,
                                               frag->size,
                                               DMA_TO_DEVICE);
                if (dma_mapping_error(port->dev->dev.parent, buf_dma_addr)) {
                        mvpp2_txq_desc_put(txq);
                        goto cleanup;
                }

                mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);

                if (i == (skb_shinfo(skb)->nr_frags - 1)) {
                        /* Last descriptor */
                        mvpp2_txdesc_cmd_set(port, tx_desc,
                                             MVPP2_TXD_L_DESC);
                        mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc);
                } else {
                        /* Descriptor in the middle: Not First, Not Last */
                        mvpp2_txdesc_cmd_set(port, tx_desc, 0);
                        mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc);
                }
        }

        return 0;
cleanup:
        /* Release all descriptors that were used to map fragments of
         * this packet, as well as the corresponding DMA mappings
         */
        for (i = i - 1; i >= 0; i--) {
                tx_desc = txq->descs + i;
                tx_desc_unmap_put(port, txq, tx_desc);
        }

        return -ENOMEM;
}

static inline void mvpp2_tso_put_hdr(struct sk_buff *skb,
                                     struct net_device *dev,
                                     struct mvpp2_tx_queue *txq,
                                     struct mvpp2_tx_queue *aggr_txq,
                                     struct mvpp2_txq_pcpu *txq_pcpu,
                                     int hdr_sz)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
        dma_addr_t addr;

        mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
        mvpp2_txdesc_size_set(port, tx_desc, hdr_sz);

        addr = txq_pcpu->tso_headers_dma +
               txq_pcpu->txq_put_index * TSO_HEADER_SIZE;
        mvpp2_txdesc_dma_addr_set(port, tx_desc, addr);

        mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) |
                                            MVPP2_TXD_F_DESC |
                                            MVPP2_TXD_PADDING_DISABLE);
        mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc);
}

static inline int mvpp2_tso_put_data(struct sk_buff *skb,
                                     struct net_device *dev, struct tso_t *tso,
                                     struct mvpp2_tx_queue *txq,
                                     struct mvpp2_tx_queue *aggr_txq,
                                     struct mvpp2_txq_pcpu *txq_pcpu,
                                     int sz, bool left, bool last)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
        dma_addr_t buf_dma_addr;

        mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
        mvpp2_txdesc_size_set(port, tx_desc, sz);

        buf_dma_addr = dma_map_single(dev->dev.parent, tso->data, sz,
                                      DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) {
                mvpp2_txq_desc_put(txq);
                return -ENOMEM;
        }

        mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);

        if (!left) {
                mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC);
                if (last) {
                        mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc);
                        return 0;
                }
        } else {
                mvpp2_txdesc_cmd_set(port, tx_desc, 0);
        }

        mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc);
        return 0;
}

static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev,
                        struct mvpp2_tx_queue *txq,
                        struct mvpp2_tx_queue *aggr_txq,
                        struct mvpp2_txq_pcpu *txq_pcpu)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct tso_t tso;
        int hdr_sz = skb_transport_offset(skb) + tcp_hdrlen(skb);
        int i, len, descs = 0;

        /* Check number of available descriptors */
        if (mvpp2_aggr_desc_num_check(port->priv, aggr_txq,
                                      tso_count_descs(skb)) ||
            mvpp2_txq_reserved_desc_num_proc(port->priv, txq, txq_pcpu,
                                             tso_count_descs(skb)))
                return 0;

        tso_start(skb, &tso);
        len = skb->len - hdr_sz;
        while (len > 0) {
                int left = min_t(int, skb_shinfo(skb)->gso_size, len);
                char *hdr = txq_pcpu->tso_headers +
                            txq_pcpu->txq_put_index * TSO_HEADER_SIZE;

                len -= left;
                descs++;

                tso_build_hdr(skb, hdr, &tso, left, len == 0);
                mvpp2_tso_put_hdr(skb, dev, txq, aggr_txq, txq_pcpu, hdr_sz);

                while (left > 0) {
                        int sz = min_t(int, tso.size, left);
                        left -= sz;
                        descs++;

                        if (mvpp2_tso_put_data(skb, dev, &tso, txq, aggr_txq,
                                               txq_pcpu, sz, left, len == 0))
                                goto release;
                        tso_build_data(skb, &tso, sz);
                }
        }

        return descs;

release:
        for (i = descs - 1; i >= 0; i--) {
                struct mvpp2_tx_desc *tx_desc = txq->descs + i;
                tx_desc_unmap_put(port, txq, tx_desc);
        }
        return 0;
}

/* Main tx processing */
static int mvpp2_tx(struct sk_buff *skb, struct net_device *dev)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2_tx_queue *txq, *aggr_txq;
        struct mvpp2_txq_pcpu *txq_pcpu;
        struct mvpp2_tx_desc *tx_desc;
        dma_addr_t buf_dma_addr;
        int frags = 0;
        u16 txq_id;
        u32 tx_cmd;

        txq_id = skb_get_queue_mapping(skb);
        txq = port->txqs[txq_id];
        txq_pcpu = this_cpu_ptr(txq->pcpu);
        aggr_txq = &port->priv->aggr_txqs[smp_processor_id()];

        if (skb_is_gso(skb)) {
                frags = mvpp2_tx_tso(skb, dev, txq, aggr_txq, txq_pcpu);
                goto out;
        }
        frags = skb_shinfo(skb)->nr_frags + 1;

        /* Check number of available descriptors */
        if (mvpp2_aggr_desc_num_check(port->priv, aggr_txq, frags) ||
            mvpp2_txq_reserved_desc_num_proc(port->priv, txq,
                                             txq_pcpu, frags)) {
                frags = 0;
                goto out;
        }

        /* 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, skb_headlen(skb));

        buf_dma_addr = dma_map_single(dev->dev.parent, skb->data,
                                      skb_headlen(skb), DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) {
                mvpp2_txq_desc_put(txq);
                frags = 0;
                goto out;
        }

        mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);

        tx_cmd = mvpp2_skb_tx_csum(port, skb);

        if (frags == 1) {
                /* First and Last descriptor */
                tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC;
                mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd);
                mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc);
        } else {
                /* First but not Last */
                tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE;
                mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd);
                mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc);

                /* Continue with other skb fragments */
                if (mvpp2_tx_frag_process(port, skb, aggr_txq, txq)) {
                        tx_desc_unmap_put(port, txq, tx_desc);
                        frags = 0;
                }
        }

out:
        if (frags > 0) {
                struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);
                struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id);

                txq_pcpu->reserved_num -= frags;
                txq_pcpu->count += frags;
                aggr_txq->count += frags;

                /* Enable transmit */
                wmb();
                mvpp2_aggr_txq_pend_desc_add(port, frags);

                if (txq_pcpu->count >= txq_pcpu->stop_threshold)
                        netif_tx_stop_queue(nq);

                u64_stats_update_begin(&stats->syncp);
                stats->tx_packets++;
                stats->tx_bytes += skb->len;
                u64_stats_update_end(&stats->syncp);
        } else {
                dev->stats.tx_dropped++;
                dev_kfree_skb_any(skb);
        }

        /* Finalize TX processing */
        if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal)
                mvpp2_txq_done(port, txq, txq_pcpu);

        /* Set the timer in case not all frags were processed */
        if (!port->has_tx_irqs && txq_pcpu->count <= frags &&
            txq_pcpu->count > 0) {
                struct mvpp2_port_pcpu *port_pcpu = this_cpu_ptr(port->pcpu);

                mvpp2_timer_set(port_pcpu);
        }

        return NETDEV_TX_OK;
}

static inline void mvpp2_cause_error(struct net_device *dev, int cause)
{
        if (cause & MVPP2_CAUSE_FCS_ERR_MASK)
                netdev_err(dev, "FCS error\n");
        if (cause & MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK)
                netdev_err(dev, "rx fifo overrun error\n");
        if (cause & MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK)
                netdev_err(dev, "tx fifo underrun error\n");
}

static int mvpp2_poll(struct napi_struct *napi, int budget)
{
        u32 cause_rx_tx, cause_rx, cause_tx, cause_misc;
        int rx_done = 0;
        struct mvpp2_port *port = netdev_priv(napi->dev);
        struct mvpp2_queue_vector *qv;
        int cpu = smp_processor_id();

        qv = container_of(napi, struct mvpp2_queue_vector, napi);

        /* Rx/Tx cause register
         *
         * Bits 0-15: each bit indicates received packets on the Rx queue
         * (bit 0 is for Rx queue 0).
         *
         * Bits 16-23: each bit indicates transmitted packets on the Tx queue
         * (bit 16 is for Tx queue 0).
         *
         * Each CPU has its own Rx/Tx cause register
         */
        cause_rx_tx = mvpp2_percpu_read(port->priv, qv->sw_thread_id,
                                        MVPP2_ISR_RX_TX_CAUSE_REG(port->id));

        cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK;
        if (cause_misc) {
                mvpp2_cause_error(port->dev, cause_misc);

                /* Clear the cause register */
                mvpp2_write(port->priv, MVPP2_ISR_MISC_CAUSE_REG, 0);
                mvpp2_percpu_write(port->priv, cpu,
                                   MVPP2_ISR_RX_TX_CAUSE_REG(port->id),
                                   cause_rx_tx & ~MVPP2_CAUSE_MISC_SUM_MASK);
        }

        cause_tx = cause_rx_tx & MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;
        if (cause_tx) {
                cause_tx >>= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_OFFSET;
                mvpp2_tx_done(port, cause_tx, qv->sw_thread_id);
        }

        /* Process RX packets */
        cause_rx = cause_rx_tx & MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK;
        cause_rx <<= qv->first_rxq;
        cause_rx |= qv->pending_cause_rx;
        while (cause_rx && budget > 0) {
                int count;
                struct mvpp2_rx_queue *rxq;

                rxq = mvpp2_get_rx_queue(port, cause_rx);
                if (!rxq)
                        break;

                count = mvpp2_rx(port, napi, budget, rxq);
                rx_done += count;
                budget -= count;
                if (budget > 0) {
                        /* Clear the bit associated to this Rx queue
                         * so that next iteration will continue from
                         * the next Rx queue.
                         */
                        cause_rx &= ~(1 << rxq->logic_rxq);
                }
        }

        if (budget > 0) {
                cause_rx = 0;
                napi_complete_done(napi, rx_done);

                mvpp2_qvec_interrupt_enable(qv);
        }
        qv->pending_cause_rx = cause_rx;
        return rx_done;
}

/* Set hw internals when starting port */
static void mvpp2_start_dev(struct mvpp2_port *port)
{
        struct net_device *ndev = port->dev;
        int i;

        if (port->gop_id == 0 &&
            (port->phy_interface == PHY_INTERFACE_MODE_XAUI ||
             port->phy_interface == PHY_INTERFACE_MODE_10GKR))
                mvpp2_xlg_max_rx_size_set(port);
        else
                mvpp2_gmac_max_rx_size_set(port);

        mvpp2_txp_max_tx_size_set(port);

        for (i = 0; i < port->nqvecs; i++)
                napi_enable(&port->qvecs[i].napi);

        /* Enable interrupts on all CPUs */
        mvpp2_interrupts_enable(port);

        if (port->priv->hw_version == MVPP22) {
                mvpp22_comphy_init(port);
                mvpp22_gop_init(port);
        }

        mvpp2_port_mii_set(port);
        mvpp2_port_enable(port);
        if (ndev->phydev)
                phy_start(ndev->phydev);
        netif_tx_start_all_queues(port->dev);
}

/* Set hw internals when stopping port */
static void mvpp2_stop_dev(struct mvpp2_port *port)
{
        struct net_device *ndev = port->dev;
        int i;

        /* Stop new packets from arriving to RXQs */
        mvpp2_ingress_disable(port);

        mdelay(10);

        /* Disable interrupts on all CPUs */
        mvpp2_interrupts_disable(port);

        for (i = 0; i < port->nqvecs; i++)
                napi_disable(&port->qvecs[i].napi);

        netif_carrier_off(port->dev);
        netif_tx_stop_all_queues(port->dev);

        mvpp2_egress_disable(port);
        mvpp2_port_disable(port);
        if (ndev->phydev)
                phy_stop(ndev->phydev);
        phy_power_off(port->comphy);
}

static int mvpp2_check_ringparam_valid(struct net_device *dev,
                                       struct ethtool_ringparam *ring)
{
        u16 new_rx_pending = ring->rx_pending;
        u16 new_tx_pending = ring->tx_pending;

        if (ring->rx_pending == 0 || ring->tx_pending == 0)
                return -EINVAL;

        if (ring->rx_pending > MVPP2_MAX_RXD_MAX)
                new_rx_pending = MVPP2_MAX_RXD_MAX;
        else if (!IS_ALIGNED(ring->rx_pending, 16))
                new_rx_pending = ALIGN(ring->rx_pending, 16);

        if (ring->tx_pending > MVPP2_MAX_TXD_MAX)
                new_tx_pending = MVPP2_MAX_TXD_MAX;
        else if (!IS_ALIGNED(ring->tx_pending, 32))
                new_tx_pending = ALIGN(ring->tx_pending, 32);

        /* The Tx ring size cannot be smaller than the minimum number of
         * descriptors needed for TSO.
         */
        if (new_tx_pending < MVPP2_MAX_SKB_DESCS)
                new_tx_pending = ALIGN(MVPP2_MAX_SKB_DESCS, 32);

        if (ring->rx_pending != new_rx_pending) {
                netdev_info(dev, "illegal Rx ring size value %d, round to %d\n",
                            ring->rx_pending, new_rx_pending);
                ring->rx_pending = new_rx_pending;
        }

        if (ring->tx_pending != new_tx_pending) {
                netdev_info(dev, "illegal Tx ring size value %d, round to %d\n",
                            ring->tx_pending, new_tx_pending);
                ring->tx_pending = new_tx_pending;
        }

        return 0;
}

static void mvpp21_get_mac_address(struct mvpp2_port *port, unsigned char *addr)
{
        u32 mac_addr_l, mac_addr_m, mac_addr_h;

        mac_addr_l = readl(port->base + MVPP2_GMAC_CTRL_1_REG);
        mac_addr_m = readl(port->priv->lms_base + MVPP2_SRC_ADDR_MIDDLE);
        mac_addr_h = readl(port->priv->lms_base + MVPP2_SRC_ADDR_HIGH);
        addr[0] = (mac_addr_h >> 24) & 0xFF;
        addr[1] = (mac_addr_h >> 16) & 0xFF;
        addr[2] = (mac_addr_h >> 8) & 0xFF;
        addr[3] = mac_addr_h & 0xFF;
        addr[4] = mac_addr_m & 0xFF;
        addr[5] = (mac_addr_l >> MVPP2_GMAC_SA_LOW_OFFS) & 0xFF;
}

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

        /* No PHY is attached */
        if (!port->phy_node)
                return 0;

        phy_dev = of_phy_connect(port->dev, port->phy_node, mvpp2_link_event, 0,
                                 port->phy_interface);
        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->link    = 0;
        port->duplex  = 0;
        port->speed   = 0;

        return 0;
}

static void mvpp2_phy_disconnect(struct mvpp2_port *port)
{
        struct net_device *ndev = port->dev;

        if (!ndev->phydev)
                return;

        phy_disconnect(ndev->phydev);
}

static int mvpp2_irqs_init(struct mvpp2_port *port)
{
        int err, i;

        for (i = 0; i < port->nqvecs; i++) {
                struct mvpp2_queue_vector *qv = port->qvecs + i;

                if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE)
                        irq_set_status_flags(qv->irq, IRQ_NO_BALANCING);

                err = request_irq(qv->irq, mvpp2_isr, 0, port->dev->name, qv);
                if (err)
                        goto err;

                if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE)
                        irq_set_affinity_hint(qv->irq,
                                              cpumask_of(qv->sw_thread_id));
        }

        return 0;
err:
        for (i = 0; i < port->nqvecs; i++) {
                struct mvpp2_queue_vector *qv = port->qvecs + i;

                irq_set_affinity_hint(qv->irq, NULL);
                free_irq(qv->irq, qv);
        }

        return err;
}

static void mvpp2_irqs_deinit(struct mvpp2_port *port)
{
        int i;

        for (i = 0; i < port->nqvecs; i++) {
                struct mvpp2_queue_vector *qv = port->qvecs + i;

                irq_set_affinity_hint(qv->irq, NULL);
                irq_clear_status_flags(qv->irq, IRQ_NO_BALANCING);
                free_irq(qv->irq, qv);
        }
}

static void mvpp22_init_rss(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        int i;

        /* Set the table width: replace the whole classifier Rx queue number
         * with the ones configured in RSS table entries.
         */
        mvpp2_write(priv, MVPP22_RSS_INDEX, MVPP22_RSS_INDEX_TABLE(0));
        mvpp2_write(priv, MVPP22_RSS_WIDTH, 8);

        /* Loop through the classifier Rx Queues and map them to a RSS table.
         * Map them all to the first table (0) by default.
         */
        for (i = 0; i < MVPP2_CLS_RX_QUEUES; i++) {
                mvpp2_write(priv, MVPP22_RSS_INDEX, MVPP22_RSS_INDEX_QUEUE(i));
                mvpp2_write(priv, MVPP22_RSS_TABLE,
                            MVPP22_RSS_TABLE_POINTER(0));
        }

        /* Configure the first table to evenly distribute the packets across
         * real Rx Queues. The table entries map a hash to an port Rx Queue.
         */
        for (i = 0; i < MVPP22_RSS_TABLE_ENTRIES; i++) {
                u32 sel = MVPP22_RSS_INDEX_TABLE(0) |
                          MVPP22_RSS_INDEX_TABLE_ENTRY(i);
                mvpp2_write(priv, MVPP22_RSS_INDEX, sel);

                mvpp2_write(priv, MVPP22_RSS_TABLE_ENTRY, i % port->nrxqs);
        }

}

static int mvpp2_open(struct net_device *dev)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2 *priv = port->priv;
        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,
                                      dev->dev_addr, true);
        if (err) {
                netdev_err(dev, "mvpp2_prs_mac_da_accept MC failed\n");
                return err;
        }
        err = mvpp2_prs_tag_mode_set(port->priv, port->id, MVPP2_TAG_TYPE_MH);
        if (err) {
                netdev_err(dev, "mvpp2_prs_tag_mode_set 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");
                goto err_cleanup_rxqs;
        }

        err = mvpp2_irqs_init(port);
        if (err) {
                netdev_err(port->dev, "cannot init IRQs\n");
                goto err_cleanup_txqs;
        }

        if (priv->hw_version == MVPP22 && !port->phy_node && port->link_irq) {
                err = request_irq(port->link_irq, mvpp2_link_status_isr, 0,
                                  dev->name, port);
                if (err) {
                        netdev_err(port->dev, "cannot request link IRQ %d\n",
                                   port->link_irq);
                        goto err_free_irq;
                }

                mvpp22_gop_setup_irq(port);
        }

        /* In default link is down */
        netif_carrier_off(port->dev);

        err = mvpp2_phy_connect(port);
        if (err < 0)
                goto err_free_link_irq;

        /* Unmask interrupts on all CPUs */
        on_each_cpu(mvpp2_interrupts_unmask, port, 1);
        mvpp2_shared_interrupt_mask_unmask(port, false);

        mvpp2_start_dev(port);

        if (priv->hw_version == MVPP22)
                mvpp22_init_rss(port);

        /* Start hardware statistics gathering */
        queue_delayed_work(priv->stats_queue, &port->stats_work,
                           MVPP2_MIB_COUNTERS_STATS_DELAY);

        return 0;

err_free_link_irq:
        if (priv->hw_version == MVPP22 && !port->phy_node && port->link_irq)
                free_irq(port->link_irq, port);
err_free_irq:
        mvpp2_irqs_deinit(port);
err_cleanup_txqs:
        mvpp2_cleanup_txqs(port);
err_cleanup_rxqs:
        mvpp2_cleanup_rxqs(port);
        return err;
}

static int mvpp2_stop(struct net_device *dev)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2_port_pcpu *port_pcpu;
        struct mvpp2 *priv = port->priv;
        int cpu;

        mvpp2_stop_dev(port);
        mvpp2_phy_disconnect(port);

        /* Mask interrupts on all CPUs */
        on_each_cpu(mvpp2_interrupts_mask, port, 1);
        mvpp2_shared_interrupt_mask_unmask(port, true);

        if (priv->hw_version == MVPP22 && !port->phy_node && port->link_irq)
                free_irq(port->link_irq, port);

        mvpp2_irqs_deinit(port);
        if (!port->has_tx_irqs) {
                for_each_present_cpu(cpu) {
                        port_pcpu = per_cpu_ptr(port->pcpu, cpu);

                        hrtimer_cancel(&port_pcpu->tx_done_timer);
                        port_pcpu->timer_scheduled = false;
                        tasklet_kill(&port_pcpu->tx_done_tasklet);
                }
        }
        mvpp2_cleanup_rxqs(port);
        mvpp2_cleanup_txqs(port);

        cancel_delayed_work_sync(&port->stats_work);

        return 0;
}

static void mvpp2_set_rx_mode(struct net_device *dev)
{
        struct mvpp2_port *port = netdev_priv(dev);
        struct mvpp2 *priv = port->priv;
        struct netdev_hw_addr *ha;
        int id = port->id;
        bool allmulti = dev->flags & IFF_ALLMULTI;

        mvpp2_prs_mac_promisc_set(priv, id, dev->flags & IFF_PROMISC);
        mvpp2_prs_mac_multi_set(priv, id, MVPP2_PE_MAC_MC_ALL, allmulti);
        mvpp2_prs_mac_multi_set(priv, id, MVPP2_PE_MAC_MC_IP6, allmulti);

        /* Remove all port->id's mcast enries */
        mvpp2_prs_mcast_del_all(priv, id);

        if (allmulti && !netdev_mc_empty(dev)) {
                netdev_for_each_mc_addr(ha, dev)
                        mvpp2_prs_mac_da_accept(priv, id, ha->addr, true);
        }
}

static int mvpp2_set_mac_address(struct net_device *dev, void *p)
{
        struct mvpp2_port *port = netdev_priv(dev);
        const struct sockaddr *addr = p;
        int err;

        if (!is_valid_ether_addr(addr->sa_data)) {
                err = -EADDRNOTAVAIL;
                goto log_error;
        }

        if (!netif_running(dev)) {
                err = mvpp2_prs_update_mac_da(dev, addr->sa_data);
                if (!err)
                        return 0;
                /* Reconfigure parser to accept the original MAC address */
                err = mvpp2_prs_update_mac_da(dev, dev->dev_addr);
                if (err)
                        goto log_error;
        }

        mvpp2_stop_dev(port);

        err = mvpp2_prs_update_mac_da(dev, addr->sa_data);
        if (!err)
                goto out_start;

        /* Reconfigure parser accept the original MAC address */
        err = mvpp2_prs_update_mac_da(dev, dev->dev_addr);
        if (err)
                goto log_error;
out_start:
        mvpp2_start_dev(port);
        mvpp2_egress_enable(port);
        mvpp2_ingress_enable(port);
        return 0;
log_error:
        netdev_err(dev, "failed to change MAC address\n");
        return err;
}

static int mvpp2_change_mtu(struct net_device *dev, int mtu)
{
        struct mvpp2_port *port = netdev_priv(dev);
        int err;

        if (!IS_ALIGNED(MVPP2_RX_PKT_SIZE(mtu), 8)) {
                netdev_info(dev, "illegal MTU value %d, round to %d\n", mtu,
                            ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8));
                mtu = ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8);
        }

        if (!netif_running(dev)) {
                err = mvpp2_bm_update_mtu(dev, mtu);
                if (!err) {
                        port->pkt_size =  MVPP2_RX_PKT_SIZE(mtu);
                        return 0;
                }

                /* Reconfigure BM to the original MTU */
                err = mvpp2_bm_update_mtu(dev, dev->mtu);
                if (err)
                        goto log_error;
        }

        mvpp2_stop_dev(port);

        err = mvpp2_bm_update_mtu(dev, mtu);
        if (!err) {
                port->pkt_size =  MVPP2_RX_PKT_SIZE(mtu);
                goto out_start;
        }

        /* Reconfigure BM to the original MTU */
        err = mvpp2_bm_update_mtu(dev, dev->mtu);
        if (err)
                goto log_error;

out_start:
        mvpp2_start_dev(port);
        mvpp2_egress_enable(port);
        mvpp2_ingress_enable(port);

        return 0;
log_error:
        netdev_err(dev, "failed to change MTU\n");
        return err;
}

static void
mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
        struct mvpp2_port *port = netdev_priv(dev);
        unsigned int start;
        int cpu;

        for_each_possible_cpu(cpu) {
                struct mvpp2_pcpu_stats *cpu_stats;
                u64 rx_packets;
                u64 rx_bytes;
                u64 tx_packets;
                u64 tx_bytes;

                cpu_stats = per_cpu_ptr(port->stats, cpu);
                do {
                        start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
                        rx_packets = cpu_stats->rx_packets;
                        rx_bytes   = cpu_stats->rx_bytes;
                        tx_packets = cpu_stats->tx_packets;
                        tx_bytes   = cpu_stats->tx_bytes;
                } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));

                stats->rx_packets += rx_packets;
                stats->rx_bytes   += rx_bytes;
                stats->tx_packets += tx_packets;
                stats->tx_bytes   += tx_bytes;
        }

        stats->rx_errors        = dev->stats.rx_errors;
        stats->rx_dropped       = dev->stats.rx_dropped;
        stats->tx_dropped       = dev->stats.tx_dropped;
}

static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
        int ret;

        if (!dev->phydev)
                return -ENOTSUPP;

        ret = phy_mii_ioctl(dev->phydev, ifr, cmd);
        if (!ret)
                mvpp2_link_event(dev);

        return ret;
}

/* Ethtool methods */

/* Set interrupt coalescing for ethtools */
static int mvpp2_ethtool_set_coalesce(struct net_device *dev,
                                      struct ethtool_coalesce *c)
{
        struct mvpp2_port *port = netdev_priv(dev);
        int queue;

        for (queue = 0; queue < port->nrxqs; queue++) {
                struct mvpp2_rx_queue *rxq = port->rxqs[queue];

                rxq->time_coal = c->rx_coalesce_usecs;
                rxq->pkts_coal = c->rx_max_coalesced_frames;
                mvpp2_rx_pkts_coal_set(port, rxq);
                mvpp2_rx_time_coal_set(port, rxq);
        }

        if (port->has_tx_irqs) {
                port->tx_time_coal = c->tx_coalesce_usecs;
                mvpp2_tx_time_coal_set(port);
        }

        for (queue = 0; queue < port->ntxqs; queue++) {
                struct mvpp2_tx_queue *txq = port->txqs[queue];

                txq->done_pkts_coal = c->tx_max_coalesced_frames;

                if (port->has_tx_irqs)
                        mvpp2_tx_pkts_coal_set(port, txq);
        }

        return 0;
}

/* get coalescing for ethtools */
static int mvpp2_ethtool_get_coalesce(struct net_device *dev,
                                      struct ethtool_coalesce *c)
{
        struct mvpp2_port *port = netdev_priv(dev);

        c->rx_coalesce_usecs       = port->rxqs[0]->time_coal;
        c->rx_max_coalesced_frames = port->rxqs[0]->pkts_coal;
        c->tx_max_coalesced_frames = port->txqs[0]->done_pkts_coal;
        c->tx_coalesce_usecs       = port->tx_time_coal;
        return 0;
}

static void mvpp2_ethtool_get_drvinfo(struct net_device *dev,
                                      struct ethtool_drvinfo *drvinfo)
{
        strlcpy(drvinfo->driver, MVPP2_DRIVER_NAME,
                sizeof(drvinfo->driver));
        strlcpy(drvinfo->version, MVPP2_DRIVER_VERSION,
                sizeof(drvinfo->version));
        strlcpy(drvinfo->bus_info, dev_name(&dev->dev),
                sizeof(drvinfo->bus_info));
}

static void mvpp2_ethtool_get_ringparam(struct net_device *dev,
                                        struct ethtool_ringparam *ring)
{
        struct mvpp2_port *port = netdev_priv(dev);

        ring->rx_max_pending = MVPP2_MAX_RXD_MAX;
        ring->tx_max_pending = MVPP2_MAX_TXD_MAX;
        ring->rx_pending = port->rx_ring_size;
        ring->tx_pending = port->tx_ring_size;
}

static int mvpp2_ethtool_set_ringparam(struct net_device *dev,
                                       struct ethtool_ringparam *ring)
{
        struct mvpp2_port *port = netdev_priv(dev);
        u16 prev_rx_ring_size = port->rx_ring_size;
        u16 prev_tx_ring_size = port->tx_ring_size;
        int err;

        err = mvpp2_check_ringparam_valid(dev, ring);
        if (err)
                return err;

        if (!netif_running(dev)) {
                port->rx_ring_size = ring->rx_pending;
                port->tx_ring_size = ring->tx_pending;
                return 0;
        }

        /* The interface is running, so we have to force a
         * reallocation of the queues
         */
        mvpp2_stop_dev(port);
        mvpp2_cleanup_rxqs(port);
        mvpp2_cleanup_txqs(port);

        port->rx_ring_size = ring->rx_pending;
        port->tx_ring_size = ring->tx_pending;

        err = mvpp2_setup_rxqs(port);
        if (err) {
                /* Reallocate Rx queues with the original ring size */
                port->rx_ring_size = prev_rx_ring_size;
                ring->rx_pending = prev_rx_ring_size;
                err = mvpp2_setup_rxqs(port);
                if (err)
                        goto err_out;
        }
        err = mvpp2_setup_txqs(port);
        if (err) {
                /* Reallocate Tx queues with the original ring size */
                port->tx_ring_size = prev_tx_ring_size;
                ring->tx_pending = prev_tx_ring_size;
                err = mvpp2_setup_txqs(port);
                if (err)
                        goto err_clean_rxqs;
        }

        mvpp2_start_dev(port);
        mvpp2_egress_enable(port);
        mvpp2_ingress_enable(port);

        return 0;

err_clean_rxqs:
        mvpp2_cleanup_rxqs(port);
err_out:
        netdev_err(dev, "failed to change ring parameters");
        return err;
}

/* Device ops */

static const struct net_device_ops mvpp2_netdev_ops = {
        .ndo_open               = mvpp2_open,
        .ndo_stop               = mvpp2_stop,
        .ndo_start_xmit         = mvpp2_tx,
        .ndo_set_rx_mode        = mvpp2_set_rx_mode,
        .ndo_set_mac_address    = mvpp2_set_mac_address,
        .ndo_change_mtu         = mvpp2_change_mtu,
        .ndo_get_stats64        = mvpp2_get_stats64,
        .ndo_do_ioctl           = mvpp2_ioctl,
};

static const struct ethtool_ops mvpp2_eth_tool_ops = {
        .nway_reset     = phy_ethtool_nway_reset,
        .get_link       = ethtool_op_get_link,
        .set_coalesce   = mvpp2_ethtool_set_coalesce,
        .get_coalesce   = mvpp2_ethtool_get_coalesce,
        .get_drvinfo    = mvpp2_ethtool_get_drvinfo,
        .get_ringparam  = mvpp2_ethtool_get_ringparam,
        .set_ringparam  = mvpp2_ethtool_set_ringparam,
        .get_strings    = mvpp2_ethtool_get_strings,
        .get_ethtool_stats = mvpp2_ethtool_get_stats,
        .get_sset_count = mvpp2_ethtool_get_sset_count,
        .get_link_ksettings = phy_ethtool_get_link_ksettings,
        .set_link_ksettings = phy_ethtool_set_link_ksettings,
};

/* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that
 * had a single IRQ defined per-port.
 */
static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port,
                                           struct device_node *port_node)
{
        struct mvpp2_queue_vector *v = &port->qvecs[0];

        v->first_rxq = 0;
        v->nrxqs = port->nrxqs;
        v->type = MVPP2_QUEUE_VECTOR_SHARED;
        v->sw_thread_id = 0;
        v->sw_thread_mask = *cpumask_bits(cpu_online_mask);
        v->port = port;
        v->irq = irq_of_parse_and_map(port_node, 0);
        if (v->irq <= 0)
                return -EINVAL;
        netif_napi_add(port->dev, &v->napi, mvpp2_poll,
                       NAPI_POLL_WEIGHT);

        port->nqvecs = 1;

        return 0;
}

static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port,
                                          struct device_node *port_node)
{
        struct mvpp2_queue_vector *v;
        int i, ret;

        port->nqvecs = num_possible_cpus();
        if (queue_mode == MVPP2_QDIST_SINGLE_MODE)
                port->nqvecs += 1;

        for (i = 0; i < port->nqvecs; i++) {
                char irqname[16];

                v = port->qvecs + i;

                v->port = port;
                v->type = MVPP2_QUEUE_VECTOR_PRIVATE;
                v->sw_thread_id = i;
                v->sw_thread_mask = BIT(i);

                snprintf(irqname, sizeof(irqname), "tx-cpu%d", i);

                if (queue_mode == MVPP2_QDIST_MULTI_MODE) {
                        v->first_rxq = i * MVPP2_DEFAULT_RXQ;
                        v->nrxqs = MVPP2_DEFAULT_RXQ;
                } else if (queue_mode == MVPP2_QDIST_SINGLE_MODE &&
                           i == (port->nqvecs - 1)) {
                        v->first_rxq = 0;
                        v->nrxqs = port->nrxqs;
                        v->type = MVPP2_QUEUE_VECTOR_SHARED;
                        strncpy(irqname, "rx-shared", sizeof(irqname));
                }

                if (port_node)
                        v->irq = of_irq_get_byname(port_node, irqname);
                else
                        v->irq = fwnode_irq_get(port->fwnode, i);
                if (v->irq <= 0) {
                        ret = -EINVAL;
                        goto err;
                }

                netif_napi_add(port->dev, &v->napi, mvpp2_poll,
                               NAPI_POLL_WEIGHT);
        }

        return 0;

err:
        for (i = 0; i < port->nqvecs; i++)
                irq_dispose_mapping(port->qvecs[i].irq);
        return ret;
}

static int mvpp2_queue_vectors_init(struct mvpp2_port *port,
                                    struct device_node *port_node)
{
        if (port->has_tx_irqs)
                return mvpp2_multi_queue_vectors_init(port, port_node);
        else
                return mvpp2_simple_queue_vectors_init(port, port_node);
}

static void mvpp2_queue_vectors_deinit(struct mvpp2_port *port)
{
        int i;

        for (i = 0; i < port->nqvecs; i++)
                irq_dispose_mapping(port->qvecs[i].irq);
}

/* Configure Rx queue group interrupt for this port */
static void mvpp2_rx_irqs_setup(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        u32 val;
        int i;

        if (priv->hw_version == MVPP21) {
                mvpp2_write(priv, MVPP21_ISR_RXQ_GROUP_REG(port->id),
                            port->nrxqs);
                return;
        }

        /* Handle the more complicated PPv2.2 case */
        for (i = 0; i < port->nqvecs; i++) {
                struct mvpp2_queue_vector *qv = port->qvecs + i;

                if (!qv->nrxqs)
                        continue;

                val = qv->sw_thread_id;
                val |= port->id << MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET;
                mvpp2_write(priv, MVPP22_ISR_RXQ_GROUP_INDEX_REG, val);

                val = qv->first_rxq;
                val |= qv->nrxqs << MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET;
                mvpp2_write(priv, MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG, val);
        }
}

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

        /* Checks for hardware constraints */
        if (port->first_rxq + port->nrxqs >
            MVPP2_MAX_PORTS * priv->max_port_rxqs)
                return -EINVAL;

        if (port->nrxqs % 4 || (port->nrxqs > priv->max_port_rxqs) ||
            (port->ntxqs > MVPP2_MAX_TXQ))
                return -EINVAL;

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

        port->tx_time_coal = MVPP2_TXDONE_COAL_USEC;

        port->txqs = devm_kcalloc(dev, port->ntxqs, 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 < port->ntxqs; 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) {
                        err = -ENOMEM;
                        goto err_free_percpu;
                }

                txq->pcpu = alloc_percpu(struct mvpp2_txq_pcpu);
                if (!txq->pcpu) {
                        err = -ENOMEM;
                        goto err_free_percpu;
                }

                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, port->nrxqs, sizeof(*port->rxqs),
                                  GFP_KERNEL);
        if (!port->rxqs) {
                err = -ENOMEM;
                goto err_free_percpu;
        }

        /* Allocate and initialize Rx queue for this port */
        for (queue = 0; queue < port->nrxqs; 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) {
                        err = -ENOMEM;
                        goto err_free_percpu;
                }
                /* 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;
        }

        mvpp2_rx_irqs_setup(port);

        /* Create Rx descriptor rings */
        for (queue = 0; queue < port->nrxqs; 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(port->dev->mtu);

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

        return 0;

err_free_percpu:
        for (queue = 0; queue < port->ntxqs; queue++) {
                if (!port->txqs[queue])
                        continue;
                free_percpu(port->txqs[queue]->pcpu);
        }
        return err;
}

/* Checks if the port DT description has the TX interrupts
 * described. On PPv2.1, there are no such interrupts. On PPv2.2,
 * there are available, but we need to keep support for old DTs.
 */
static bool mvpp2_port_has_tx_irqs(struct mvpp2 *priv,
                                   struct device_node *port_node)
{
        char *irqs[5] = { "rx-shared", "tx-cpu0", "tx-cpu1",
                          "tx-cpu2", "tx-cpu3" };
        int ret, i;

        if (priv->hw_version == MVPP21)
                return false;

        for (i = 0; i < 5; i++) {
                ret = of_property_match_string(port_node, "interrupt-names",
                                               irqs[i]);
                if (ret < 0)
                        return false;
        }

        return true;
}

static void mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv,
                                     struct fwnode_handle *fwnode,
                                     char **mac_from)
{
        struct mvpp2_port *port = netdev_priv(dev);
        char hw_mac_addr[ETH_ALEN] = {0};
        char fw_mac_addr[ETH_ALEN];

        if (fwnode_get_mac_address(fwnode, fw_mac_addr, ETH_ALEN)) {
                *mac_from = "firmware node";
                ether_addr_copy(dev->dev_addr, fw_mac_addr);
                return;
        }

        if (priv->hw_version == MVPP21) {
                mvpp21_get_mac_address(port, hw_mac_addr);
                if (is_valid_ether_addr(hw_mac_addr)) {
                        *mac_from = "hardware";
                        ether_addr_copy(dev->dev_addr, hw_mac_addr);
                        return;
                }
        }

        *mac_from = "random";
        eth_hw_addr_random(dev);
}

/* Ports initialization */
static int mvpp2_port_probe(struct platform_device *pdev,
                            struct fwnode_handle *port_fwnode,
                            struct mvpp2 *priv)
{
        struct device_node *phy_node;
        struct phy *comphy = NULL;
        struct mvpp2_port *port;
        struct mvpp2_port_pcpu *port_pcpu;
        struct device_node *port_node = to_of_node(port_fwnode);
        struct net_device *dev;
        struct resource *res;
        char *mac_from = "";
        unsigned int ntxqs, nrxqs;
        bool has_tx_irqs;
        u32 id;
        int features;
        int phy_mode;
        int err, i, cpu;

        if (port_node) {
                has_tx_irqs = mvpp2_port_has_tx_irqs(priv, port_node);
        } else {
                has_tx_irqs = true;
                queue_mode = MVPP2_QDIST_MULTI_MODE;
        }

        if (!has_tx_irqs)
                queue_mode = MVPP2_QDIST_SINGLE_MODE;

        ntxqs = MVPP2_MAX_TXQ;
        if (priv->hw_version == MVPP22 && queue_mode == MVPP2_QDIST_MULTI_MODE)
                nrxqs = MVPP2_DEFAULT_RXQ * num_possible_cpus();
        else
                nrxqs = MVPP2_DEFAULT_RXQ;

        dev = alloc_etherdev_mqs(sizeof(*port), ntxqs, nrxqs);
        if (!dev)
                return -ENOMEM;

        if (port_node)
                phy_node = of_parse_phandle(port_node, "phy", 0);
        else
                phy_node = NULL;

        phy_mode = fwnode_get_phy_mode(port_fwnode);
        if (phy_mode < 0) {
                dev_err(&pdev->dev, "incorrect phy mode\n");
                err = phy_mode;
                goto err_free_netdev;
        }

        if (port_node) {
                comphy = devm_of_phy_get(&pdev->dev, port_node, NULL);
                if (IS_ERR(comphy)) {
                        if (PTR_ERR(comphy) == -EPROBE_DEFER) {
                                err = -EPROBE_DEFER;
                                goto err_free_netdev;
                        }
                        comphy = NULL;
                }
        }

        if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) {
                err = -EINVAL;
                dev_err(&pdev->dev, "missing port-id value\n");
                goto err_free_netdev;
        }

        dev->tx_queue_len = MVPP2_MAX_TXD_MAX;
        dev->watchdog_timeo = 5 * HZ;
        dev->netdev_ops = &mvpp2_netdev_ops;
        dev->ethtool_ops = &mvpp2_eth_tool_ops;

        port = netdev_priv(dev);
        port->dev = dev;
        port->fwnode = port_fwnode;
        port->ntxqs = ntxqs;
        port->nrxqs = nrxqs;
        port->priv = priv;
        port->has_tx_irqs = has_tx_irqs;

        err = mvpp2_queue_vectors_init(port, port_node);
        if (err)
                goto err_free_netdev;

        if (port_node)
                port->link_irq = of_irq_get_byname(port_node, "link");
        else
                port->link_irq = fwnode_irq_get(port_fwnode, port->nqvecs + 1);
        if (port->link_irq == -EPROBE_DEFER) {
                err = -EPROBE_DEFER;
                goto err_deinit_qvecs;
        }
        if (port->link_irq <= 0)
                /* the link irq is optional */
                port->link_irq = 0;

        if (fwnode_property_read_bool(port_fwnode, "marvell,loopback"))
                port->flags |= MVPP2_F_LOOPBACK;

        port->id = id;
        if (priv->hw_version == MVPP21)
                port->first_rxq = port->id * port->nrxqs;
        else
                port->first_rxq = port->id * priv->max_port_rxqs;

        port->phy_node = phy_node;
        port->phy_interface = phy_mode;
        port->comphy = comphy;

        if (priv->hw_version == MVPP21) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, 2 + id);
                port->base = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(port->base)) {
                        err = PTR_ERR(port->base);
                        goto err_free_irq;
                }

                port->stats_base = port->priv->lms_base +
                                   MVPP21_MIB_COUNTERS_OFFSET +
                                   port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ;
        } else {
                if (fwnode_property_read_u32(port_fwnode, "gop-port-id",
                                             &port->gop_id)) {
                        err = -EINVAL;
                        dev_err(&pdev->dev, "missing gop-port-id value\n");
                        goto err_deinit_qvecs;
                }

                port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id);
                port->stats_base = port->priv->iface_base +
                                   MVPP22_MIB_COUNTERS_OFFSET +
                                   port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ;
        }

        /* Alloc per-cpu and ethtool stats */
        port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats);
        if (!port->stats) {
                err = -ENOMEM;
                goto err_free_irq;
        }

        port->ethtool_stats = devm_kcalloc(&pdev->dev,
                                           ARRAY_SIZE(mvpp2_ethtool_regs),
                                           sizeof(u64), GFP_KERNEL);
        if (!port->ethtool_stats) {
                err = -ENOMEM;
                goto err_free_stats;
        }

        mutex_init(&port->gather_stats_lock);
        INIT_DELAYED_WORK(&port->stats_work, mvpp2_gather_hw_statistics);

        mvpp2_port_copy_mac_addr(dev, priv, port_fwnode, &mac_from);

        port->tx_ring_size = MVPP2_MAX_TXD_DFLT;
        port->rx_ring_size = MVPP2_MAX_RXD_DFLT;
        SET_NETDEV_DEV(dev, &pdev->dev);

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

        mvpp2_port_periodic_xon_disable(port);

        if (priv->hw_version == MVPP21)
                mvpp2_port_fc_adv_enable(port);

        mvpp2_port_reset(port);

        port->pcpu = alloc_percpu(struct mvpp2_port_pcpu);
        if (!port->pcpu) {
                err = -ENOMEM;
                goto err_free_txq_pcpu;
        }

        if (!port->has_tx_irqs) {
                for_each_present_cpu(cpu) {
                        port_pcpu = per_cpu_ptr(port->pcpu, cpu);

                        hrtimer_init(&port_pcpu->tx_done_timer, CLOCK_MONOTONIC,
                                     HRTIMER_MODE_REL_PINNED);
                        port_pcpu->tx_done_timer.function = mvpp2_hr_timer_cb;
                        port_pcpu->timer_scheduled = false;

                        tasklet_init(&port_pcpu->tx_done_tasklet,
                                     mvpp2_tx_proc_cb,
                                     (unsigned long)dev);
                }
        }

        features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
        dev->features = features | NETIF_F_RXCSUM;
        dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO;
        dev->vlan_features |= features;
        dev->gso_max_segs = MVPP2_MAX_TSO_SEGS;

        /* MTU range: 68 - 9676 */
        dev->min_mtu = ETH_MIN_MTU;
        /* 9676 == 9700 - 20 and rounding to 8 */
        dev->max_mtu = 9676;

        err = register_netdev(dev);
        if (err < 0) {
                dev_err(&pdev->dev, "failed to register netdev\n");
                goto err_free_port_pcpu;
        }
        netdev_info(dev, "Using %s mac address %pM\n", mac_from, dev->dev_addr);

        priv->port_list[priv->port_count++] = port;

        return 0;

err_free_port_pcpu:
        free_percpu(port->pcpu);
err_free_txq_pcpu:
        for (i = 0; i < port->ntxqs; i++)
                free_percpu(port->txqs[i]->pcpu);
err_free_stats:
        free_percpu(port->stats);
err_free_irq:
        if (port->link_irq)
                irq_dispose_mapping(port->link_irq);
err_deinit_qvecs:
        mvpp2_queue_vectors_deinit(port);
err_free_netdev:
        of_node_put(phy_node);
        free_netdev(dev);
        return err;
}

/* Ports removal routine */
static void mvpp2_port_remove(struct mvpp2_port *port)
{
        int i;

        unregister_netdev(port->dev);
        of_node_put(port->phy_node);
        free_percpu(port->pcpu);
        free_percpu(port->stats);
        for (i = 0; i < port->ntxqs; i++)
                free_percpu(port->txqs[i]->pcpu);
        mvpp2_queue_vectors_deinit(port);
        if (port->link_irq)
                irq_dispose_mapping(port->link_irq);
        free_netdev(port->dev);
}

/* 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_4KB);
                mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port),
                            MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB);
        }

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

static void mvpp22_rx_fifo_init(struct mvpp2 *priv)
{
        int port;

        /* The FIFO size parameters are set depending on the maximum speed a
         * given port can handle:
         * - Port 0: 10Gbps
         * - Port 1: 2.5Gbps
         * - Ports 2 and 3: 1Gbps
         */

        mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(0),
                    MVPP2_RX_FIFO_PORT_DATA_SIZE_32KB);
        mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(0),
                    MVPP2_RX_FIFO_PORT_ATTR_SIZE_32KB);

        mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(1),
                    MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB);
        mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(1),
                    MVPP2_RX_FIFO_PORT_ATTR_SIZE_8KB);

        for (port = 2; port < MVPP2_MAX_PORTS; port++) {
                mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port),
                            MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB);
                mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port),
                            MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB);
        }

        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 Tx FIFO's */
static void mvpp22_tx_fifo_init(struct mvpp2 *priv)
{
        int port;

        for (port = 0; port < MVPP2_MAX_PORTS; port++)
                mvpp2_write(priv, MVPP22_TX_FIFO_SIZE_REG(port),
                            MVPP22_TX_FIFO_DATA_SIZE_3KB);
}

static void mvpp2_axi_init(struct mvpp2 *priv)
{
        u32 val, rdval, wrval;

        mvpp2_write(priv, MVPP22_BM_ADDR_HIGH_RLS_REG, 0x0);

        /* AXI Bridge Configuration */

        rdval = MVPP22_AXI_CODE_CACHE_RD_CACHE
                << MVPP22_AXI_ATTR_CACHE_OFFS;
        rdval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
                << MVPP22_AXI_ATTR_DOMAIN_OFFS;

        wrval = MVPP22_AXI_CODE_CACHE_WR_CACHE
                << MVPP22_AXI_ATTR_CACHE_OFFS;
        wrval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
                << MVPP22_AXI_ATTR_DOMAIN_OFFS;

        /* BM */
        mvpp2_write(priv, MVPP22_AXI_BM_WR_ATTR_REG, wrval);
        mvpp2_write(priv, MVPP22_AXI_BM_RD_ATTR_REG, rdval);

        /* Descriptors */
        mvpp2_write(priv, MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG, rdval);
        mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG, wrval);
        mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG, rdval);
        mvpp2_write(priv, MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG, wrval);

        /* Buffer Data */
        mvpp2_write(priv, MVPP22_AXI_TX_DATA_RD_ATTR_REG, rdval);
        mvpp2_write(priv, MVPP22_AXI_RX_DATA_WR_ATTR_REG, wrval);

        val = MVPP22_AXI_CODE_CACHE_NON_CACHE
                << MVPP22_AXI_CODE_CACHE_OFFS;
        val |= MVPP22_AXI_CODE_DOMAIN_SYSTEM
                << MVPP22_AXI_CODE_DOMAIN_OFFS;
        mvpp2_write(priv, MVPP22_AXI_RD_NORMAL_CODE_REG, val);
        mvpp2_write(priv, MVPP22_AXI_WR_NORMAL_CODE_REG, val);

        val = MVPP22_AXI_CODE_CACHE_RD_CACHE
                << MVPP22_AXI_CODE_CACHE_OFFS;
        val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
                << MVPP22_AXI_CODE_DOMAIN_OFFS;

        mvpp2_write(priv, MVPP22_AXI_RD_SNOOP_CODE_REG, val);

        val = MVPP22_AXI_CODE_CACHE_WR_CACHE
                << MVPP22_AXI_CODE_CACHE_OFFS;
        val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
                << MVPP22_AXI_CODE_DOMAIN_OFFS;

        mvpp2_write(priv, MVPP22_AXI_WR_SNOOP_CODE_REG, val);
}

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

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

        if (priv->hw_version == MVPP22)
                mvpp2_axi_init(priv);

        /* Disable HW PHY polling */
        if (priv->hw_version == MVPP21) {
                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);
        } else {
                val = readl(priv->iface_base + MVPP22_SMI_MISC_CFG_REG);
                val &= ~MVPP22_SMI_POLLING_EN;
                writel(val, priv->iface_base + MVPP22_SMI_MISC_CFG_REG);
        }

        /* Allocate and initialize aggregated TXQs */
        priv->aggr_txqs = devm_kcalloc(&pdev->dev, num_present_cpus(),
                                       sizeof(*priv->aggr_txqs),
                                       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(pdev, &priv->aggr_txqs[i], i, priv);
                if (err < 0)
                        return err;
        }

        /* Fifo Init */
        if (priv->hw_version == MVPP21) {
                mvpp2_rx_fifo_init(priv);
        } else {
                mvpp22_rx_fifo_init(priv);
                mvpp22_tx_fifo_init(priv);
        }

        if (priv->hw_version == MVPP21)
                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(pdev, priv);
        if (err < 0)
                return err;

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

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

        return 0;
}

static int mvpp2_probe(struct platform_device *pdev)
{
        const struct acpi_device_id *acpi_id;
        struct fwnode_handle *fwnode = pdev->dev.fwnode;
        struct fwnode_handle *port_fwnode;
        struct mvpp2 *priv;
        struct resource *res;
        void __iomem *base;
        int i;
        int err;

        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        if (has_acpi_companion(&pdev->dev)) {
                acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table,
                                            &pdev->dev);
                priv->hw_version = (unsigned long)acpi_id->driver_data;
        } else {
                priv->hw_version =
                        (unsigned long)of_device_get_match_data(&pdev->dev);
        }

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        base = devm_ioremap_resource(&pdev->dev, res);
        if (IS_ERR(base))
                return PTR_ERR(base);

        if (priv->hw_version == MVPP21) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
                priv->lms_base = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(priv->lms_base))
                        return PTR_ERR(priv->lms_base);
        } else {
                res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
                if (has_acpi_companion(&pdev->dev)) {
                        /* In case the MDIO memory region is declared in
                         * the ACPI, it can already appear as 'in-use'
                         * in the OS. Because it is overlapped by second
                         * region of the network controller, make
                         * sure it is released, before requesting it again.
                         * The care is taken by mvpp2 driver to avoid
                         * concurrent access to this memory region.
                         */
                        release_resource(res);
                }
                priv->iface_base = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(priv->iface_base))
                        return PTR_ERR(priv->iface_base);
        }

        if (priv->hw_version == MVPP22 && dev_of_node(&pdev->dev)) {
                priv->sysctrl_base =
                        syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
                                                        "marvell,system-controller");
                if (IS_ERR(priv->sysctrl_base))
                        /* The system controller regmap is optional for dt
                         * compatibility reasons. When not provided, the
                         * configuration of the GoP relies on the
                         * firmware/bootloader.
                         */
                        priv->sysctrl_base = NULL;
        }

        for (i = 0; i < MVPP2_MAX_THREADS; i++) {
                u32 addr_space_sz;

                addr_space_sz = (priv->hw_version == MVPP21 ?
                                 MVPP21_ADDR_SPACE_SZ : MVPP22_ADDR_SPACE_SZ);
                priv->swth_base[i] = base + i * addr_space_sz;
        }

        if (priv->hw_version == MVPP21)
                priv->max_port_rxqs = 8;
        else
                priv->max_port_rxqs = 32;

        if (dev_of_node(&pdev->dev)) {
                priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk");
                if (IS_ERR(priv->pp_clk))
                        return PTR_ERR(priv->pp_clk);
                err = clk_prepare_enable(priv->pp_clk);
                if (err < 0)
                        return err;

                priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk");
                if (IS_ERR(priv->gop_clk)) {
                        err = PTR_ERR(priv->gop_clk);
                        goto err_pp_clk;
                }
                err = clk_prepare_enable(priv->gop_clk);
                if (err < 0)
                        goto err_pp_clk;

                if (priv->hw_version == MVPP22) {
                        priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk");
                        if (IS_ERR(priv->mg_clk)) {
                                err = PTR_ERR(priv->mg_clk);
                                goto err_gop_clk;
                        }

                        err = clk_prepare_enable(priv->mg_clk);
                        if (err < 0)
                                goto err_gop_clk;
                }

                priv->axi_clk = devm_clk_get(&pdev->dev, "axi_clk");
                if (IS_ERR(priv->axi_clk)) {
                        err = PTR_ERR(priv->axi_clk);
                        if (err == -EPROBE_DEFER)
                                goto err_gop_clk;
                        priv->axi_clk = NULL;
                } else {
                        err = clk_prepare_enable(priv->axi_clk);
                        if (err < 0)
                                goto err_gop_clk;
                }

                /* Get system's tclk rate */
                priv->tclk = clk_get_rate(priv->pp_clk);
        } else if (device_property_read_u32(&pdev->dev, "clock-frequency",
                                            &priv->tclk)) {
                dev_err(&pdev->dev, "missing clock-frequency value\n");
                return -EINVAL;
        }

        if (priv->hw_version == MVPP22) {
                err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
                if (err)
                        goto err_mg_clk;
                /* Sadly, the BM pools all share the same register to
                 * store the high 32 bits of their address. So they
                 * must all have the same high 32 bits, which forces
                 * us to restrict coherent memory to DMA_BIT_MASK(32).
                 */
                err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
                if (err)
                        goto err_mg_clk;
        }

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

        /* Initialize ports */
        fwnode_for_each_available_child_node(fwnode, port_fwnode) {
                err = mvpp2_port_probe(pdev, port_fwnode, priv);
                if (err < 0)
                        goto err_port_probe;
        }

        if (priv->port_count == 0) {
                dev_err(&pdev->dev, "no ports enabled\n");
                err = -ENODEV;
                goto err_mg_clk;
        }

        /* Statistics must be gathered regularly because some of them (like
         * packets counters) are 32-bit registers and could overflow quite
         * quickly. For instance, a 10Gb link used at full bandwidth with the
         * smallest packets (64B) will overflow a 32-bit counter in less than
         * 30 seconds. Then, use a workqueue to fill 64-bit counters.
         */
        snprintf(priv->queue_name, sizeof(priv->queue_name),
                 "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev),
                 priv->port_count > 1 ? "+" : "");
        priv->stats_queue = create_singlethread_workqueue(priv->queue_name);
        if (!priv->stats_queue) {
                err = -ENOMEM;
                goto err_port_probe;
        }

        platform_set_drvdata(pdev, priv);
        return 0;

err_port_probe:
        i = 0;
        fwnode_for_each_available_child_node(fwnode, port_fwnode) {
                if (priv->port_list[i])
                        mvpp2_port_remove(priv->port_list[i]);
                i++;
        }
err_mg_clk:
        clk_disable_unprepare(priv->axi_clk);
        if (priv->hw_version == MVPP22)
                clk_disable_unprepare(priv->mg_clk);
err_gop_clk:
        clk_disable_unprepare(priv->gop_clk);
err_pp_clk:
        clk_disable_unprepare(priv->pp_clk);
        return err;
}

static int mvpp2_remove(struct platform_device *pdev)
{
        struct mvpp2 *priv = platform_get_drvdata(pdev);
        struct fwnode_handle *fwnode = pdev->dev.fwnode;
        struct fwnode_handle *port_fwnode;
        int i = 0;

        flush_workqueue(priv->stats_queue);
        destroy_workqueue(priv->stats_queue);

        fwnode_for_each_available_child_node(fwnode, port_fwnode) {
                if (priv->port_list[i]) {
                        mutex_destroy(&priv->port_list[i]->gather_stats_lock);
                        mvpp2_port_remove(priv->port_list[i]);
                }
                i++;
        }

        for (i = 0; i < MVPP2_BM_POOLS_NUM; i++) {
                struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i];

                mvpp2_bm_pool_destroy(pdev, priv, bm_pool);
        }

        for_each_present_cpu(i) {
                struct mvpp2_tx_queue *aggr_txq = &priv->aggr_txqs[i];

                dma_free_coherent(&pdev->dev,
                                  MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE,
                                  aggr_txq->descs,
                                  aggr_txq->descs_dma);
        }

        if (is_acpi_node(port_fwnode))
                return 0;

        clk_disable_unprepare(priv->axi_clk);
        clk_disable_unprepare(priv->mg_clk);
        clk_disable_unprepare(priv->pp_clk);
        clk_disable_unprepare(priv->gop_clk);

        return 0;
}

static const struct of_device_id mvpp2_match[] = {
        {
                .compatible = "marvell,armada-375-pp2",
                .data = (void *)MVPP21,
        },
        {
                .compatible = "marvell,armada-7k-pp22",
                .data = (void *)MVPP22,
        },
        { }
};
MODULE_DEVICE_TABLE(of, mvpp2_match);

static const struct acpi_device_id mvpp2_acpi_match[] = {
        { "MRVL0110", MVPP22 },
        { },
};
MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match);

static struct platform_driver mvpp2_driver = {
        .probe = mvpp2_probe,
        .remove = mvpp2_remove,
        .driver = {
                .name = MVPP2_DRIVER_NAME,
                .of_match_table = mvpp2_match,
                .acpi_match_table = ACPI_PTR(mvpp2_acpi_match),
        },
};

module_platform_driver(mvpp2_driver);

MODULE_DESCRIPTION("Marvell PPv2 Ethernet Driver - www.marvell.com");
MODULE_AUTHOR("Marcin Wojtas <mw@semihalf.com>");
MODULE_LICENSE("GPL v2");