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[mirror_ubuntu-hirsute-kernel.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/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/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/phy.h>
#include <linux/clk.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>
#include <uapi/linux/ppp_defs.h>
#include <net/ip.h>
#include <net/ipv6.h>

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

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

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

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

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

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

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

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

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

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

/* LMS registers */
#define MVPP2_SRC_ADDR_MIDDLE                   0x24
#define MVPP2_SRC_ADDR_HIGH                     0x28
#define MVPP2_PHY_AN_CFG0_REG                   0x34
#define     MVPP2_PHY_AN_STOP_SMI0_MASK         BIT(7)
#define MVPP2_MIB_COUNTERS_BASE(port)           (0x1000 + ((port) >> 1) * \
                                                0x400 + (port) * 0x400)
#define     MVPP2_MIB_LATE_COLLISION            0x7c
#define MVPP2_ISR_SUM_MASK_REG                  0x220c
#define MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG      0x305c
#define MVPP2_EXT_GLOBAL_CTRL_DEFAULT           0x27

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

#define MVPP2_CAUSE_TXQ_SENT_DESC_ALL_MASK      0xff

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

/* Various constants */

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

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

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

#define MVPP2_CPU_D_CACHE_LINE_SIZE     32
#define MVPP2_TX_CSUM_MAX_SIZE          9800

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

#define MVPP2_TX_MTU_MAX                0x7ffff

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

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

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

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

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

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

/* Max number of Rx descriptors */
#define MVPP2_MAX_RXD                   128

/* Max number of Tx descriptors */
#define MVPP2_MAX_TXD                   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    0x2000
#define MVPP2_RX_FIFO_PORT_ATTR_SIZE    0x80
#define MVPP2_RX_FIFO_PORT_MIN_PKT      0x80

/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
        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, MVPP2_CPU_D_CACHE_LINE_SIZE)

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

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

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

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

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

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

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

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

/* Sram result info bits assignment */
#define MVPP2_PRS_RI_MAC_ME_MASK                0x1
#define MVPP2_PRS_RI_DSA_MASK                   0x2
#define MVPP2_PRS_RI_VLAN_MASK                  0xc
#define MVPP2_PRS_RI_VLAN_NONE                  ~(BIT(2) | BIT(3))
#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               0x600
#define MVPP2_PRS_RI_L2_UCAST                   ~(BIT(9) | BIT(10))
#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              0x7000
#define MVPP2_PRS_RI_L3_UN                      ~(BIT(12) | BIT(13) | BIT(14))
#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               0x18000
#define MVPP2_PRS_RI_L3_UCAST                   ~(BIT(15) | BIT(16))
#define MVPP2_PRS_RI_L3_MCAST                   BIT(15)
#define MVPP2_PRS_RI_L3_BCAST                   (BIT(15) | BIT(16))
#define MVPP2_PRS_RI_IP_FRAG_MASK               0x20000
#define MVPP2_PRS_RI_UDF3_MASK                  0x300000
#define MVPP2_PRS_RI_UDF3_RX_SPECIAL            BIT(21)
#define MVPP2_PRS_RI_L4_PROTO_MASK              0x1c00000
#define MVPP2_PRS_RI_L4_TCP                     BIT(22)
#define MVPP2_PRS_RI_L4_UDP                     BIT(23)
#define MVPP2_PRS_RI_L4_OTHER                   (BIT(22) | BIT(23))
#define MVPP2_PRS_RI_UDF7_MASK                  0x60000000
#define MVPP2_PRS_RI_UDF7_IP6_LITE              BIT(29)
#define MVPP2_PRS_RI_DROP_MASK                  0x80000000

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

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

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

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

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

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

/* BM constants */
#define MVPP2_BM_POOLS_NUM              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)

enum mvpp2_bm_type {
        MVPP2_BM_FREE,
        MVPP2_BM_SWF_LONG,
        MVPP2_BM_SWF_SHORT
};

/* Definitions */

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

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

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

        /* Aggregated TXQs */
        struct mvpp2_tx_queue *aggr_txqs;

        /* BM pools */
        struct mvpp2_bm_pool *bm_pools;

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

        /* Tclk value */
        u32 tclk;
};

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_port {
        u8 id;

        int irq;

        struct mvpp2 *priv;

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

        struct mvpp2_rx_queue **rxqs;
        struct mvpp2_tx_queue **txqs;
        struct net_device *dev;

        int pkt_size;

        u32 pending_cause_rx;
        struct napi_struct napi;

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

        /* Flags */
        unsigned long flags;

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

        struct phy_device *phy_dev;
        phy_interface_t phy_interface;
        struct device_node *phy_node;
        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;
};

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

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

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

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

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

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

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

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

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

        /* Array of transmitted skb */
        struct sk_buff **tx_skb;

        /* Array of transmitted buffers' physical addresses */
        dma_addr_t *tx_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;
};

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;

        /* Array of transmitted skb */
        struct sk_buff **tx_skb;

        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_phys;

        /* 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_phys;

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

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

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

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

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

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

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

struct mvpp2_prs_shadow {
        bool valid;
        bool finish;

        /* Lookup ID */
        int lu;

        /* User defined offset */
        int udf;

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

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

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

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

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

        /* BPPE virtual base address */
        u32 *virt_addr;
        /* BPPE physical base address */
        dma_addr_t phys_addr;

        /* Ports using BM pool */
        u32 port_map;

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

struct mvpp2_buff_hdr {
        u32 next_buff_phys_addr;
        u32 next_buff_virt_addr;
        u16 byte_count;
        u16 info;
        u8  reserved1;          /* bm_qset (for future use, BM)         */
};

/* Buffer header info bits */
#define MVPP2_B_HDR_INFO_MC_ID_MASK     0xfff
#define MVPP2_B_HDR_INFO_MC_ID(info)    ((info) & MVPP2_B_HDR_INFO_MC_ID_MASK)
#define MVPP2_B_HDR_INFO_LAST_OFFS      12
#define MVPP2_B_HDR_INFO_LAST_MASK      BIT(12)
#define MVPP2_B_HDR_INFO_IS_LAST(info) \
           ((info & MVPP2_B_HDR_INFO_LAST_MASK) >> MVPP2_B_HDR_INFO_LAST_OFFS)

/* Static declaractions */

/* Number of RXQs used by single port */
static int rxq_number = MVPP2_DEFAULT_RXQ;
/* Number of TXQs used by single port */
static int txq_number = MVPP2_MAX_TXQ;

#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->base + offset);
}

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

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_txq_pcpu *txq_pcpu,
                              struct sk_buff *skb,
                              struct mvpp2_tx_desc *tx_desc)
{
        txq_pcpu->tx_skb[txq_pcpu->txq_put_index] = skb;
        if (skb)
                txq_pcpu->tx_buffs[txq_pcpu->txq_put_index] =
                                                         tx_desc->buf_phys_addr;
        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 = (8 << pe->tcam.byte[off + 1]) | 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(struct mvpp2_prs_entry));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);
                pe.index = MVPP2_PE_DROP_ALL;

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

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

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

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

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

        mvpp2_prs_hw_write(priv, &pe);
}

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

        /* Promiscuous mode - Accept unknown packets */

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

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

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

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

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

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

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

        mvpp2_prs_hw_write(priv, &pe);
}

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

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

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

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

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

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

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

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

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

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

        mvpp2_prs_hw_write(priv, &pe);
}

/* 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(struct mvpp2_prs_entry));
                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(struct mvpp2_prs_entry));
                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 error;
                }

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

error:
        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 error;
                }

                /* 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 error;
                }

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

error:
        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;

        /* 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(struct mvpp2_prs_entry));
        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 | MVPP2_PRS_RI_IP_FRAG_MASK,
                                 ri_mask | MVPP2_PRS_RI_IP_FRAG_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);

        /* 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;

        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_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);

        /* 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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
                pe.index = MVPP2_PE_FIRST_DEFAULT_FLOW - port;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

/* 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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_L2);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, MVPP2_IP_LBDT_TYPE);

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

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

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

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

        mvpp2_prs_match_etype(&pe, 0, 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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_entry));
        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(struct mvpp2_prs_shadow),
                                        GFP_KERNEL);
        if (!priv->prs_shadow)
                return -ENOMEM;

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

        mvpp2_prs_def_flow_init(priv);

        mvpp2_prs_mh_init(priv);

        mvpp2_prs_mac_init(priv);

        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_KERNEL);
        if (!pe)
                return NULL;
        mvpp2_prs_tcam_lu_set(pe, MVPP2_PRS_LU_MAC);

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

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

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

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

        return NULL;
}

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

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

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

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

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

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

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

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

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

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

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

        /* Set result info bits */
        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, MVPP2_CLS_FLOWS_TBL_DATA_WORDS);
        for (index = 0; index < MVPP2_CLS_FLOWS_TBL_SIZE; index++) {
                fe.index = index;
                mvpp2_cls_flow_write(priv, &fe);
        }

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

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

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

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

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

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

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

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

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

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

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

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

/* Buffer Manager configuration routines */

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

        size_bytes = sizeof(u32) * size;
        bm_pool->virt_addr = dma_alloc_coherent(&pdev->dev, size_bytes,
                                                &bm_pool->phys_addr,
                                                GFP_KERNEL);
        if (!bm_pool->virt_addr)
                return -ENOMEM;

        if (!IS_ALIGNED((u32)bm_pool->virt_addr, MVPP2_BM_POOL_PTR_ALIGN)) {
                dma_free_coherent(&pdev->dev, size_bytes, bm_pool->virt_addr,
                                  bm_pool->phys_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),
                    bm_pool->phys_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;
        atomic_set(&bm_pool->in_use, 0);

        return 0;
}

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

        bm_pool->buf_size = buf_size;

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

/* Free all buffers from the pool */
static void mvpp2_bm_bufs_free(struct 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_phys_addr;
                u32 vaddr;

                /* Get buffer virtual address (indirect access) */
                buf_phys_addr = mvpp2_read(priv,
                                           MVPP2_BM_PHY_ALLOC_REG(bm_pool->id));
                vaddr = mvpp2_read(priv, MVPP2_BM_VIRT_ALLOC_REG);

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

                if (!vaddr)
                        break;
                dev_kfree_skb_any((struct sk_buff *)vaddr);
        }

        /* 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, sizeof(u32) * bm_pool->size,
                          bm_pool->virt_addr,
                          bm_pool->phys_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(struct mvpp2_bm_pool), 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;
        int prxq;

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

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

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

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

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

        val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
        val &= ~MVPP2_RXQ_POOL_SHORT_MASK;
        val |= ((short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) &
                    MVPP2_RXQ_POOL_SHORT_MASK);

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

/* Allocate skb for BM pool */
static struct sk_buff *mvpp2_skb_alloc(struct mvpp2_port *port,
                                       struct mvpp2_bm_pool *bm_pool,
                                       dma_addr_t *buf_phys_addr,
                                       gfp_t gfp_mask)
{
        struct sk_buff *skb;
        dma_addr_t phys_addr;

        skb = __dev_alloc_skb(bm_pool->pkt_size, gfp_mask);
        if (!skb)
                return NULL;

        phys_addr = dma_map_single(port->dev->dev.parent, skb->head,
                                   MVPP2_RX_BUF_SIZE(bm_pool->pkt_size),
                                    DMA_FROM_DEVICE);
        if (unlikely(dma_mapping_error(port->dev->dev.parent, phys_addr))) {
                dev_kfree_skb_any(skb);
                return NULL;
        }
        *buf_phys_addr = phys_addr;

        return skb;
}

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

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

        return bm;
}

/* Get pool number from a BM cookie */
static inline int mvpp2_bm_cookie_pool_get(u32 cookie)
{
        return (cookie >> MVPP2_BM_COOKIE_POOL_OFFS) & 0xFF;
}

/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
                                     u32 buf_phys_addr, u32 buf_virt_addr)
{
        mvpp2_write(port->priv, MVPP2_BM_VIRT_RLS_REG, buf_virt_addr);
        mvpp2_write(port->priv, MVPP2_BM_PHY_RLS_REG(pool), buf_phys_addr);
}

/* Release multicast buffer */
static void mvpp2_bm_pool_mc_put(struct mvpp2_port *port, int pool,
                                 u32 buf_phys_addr, u32 buf_virt_addr,
                                 int mc_id)
{
        u32 val = 0;

        val |= (mc_id & MVPP2_BM_MC_ID_MASK);
        mvpp2_write(port->priv, MVPP2_BM_MC_RLS_REG, val);

        mvpp2_bm_pool_put(port, pool,
                          buf_phys_addr | MVPP2_BM_PHY_RLS_MC_BUFF_MASK,
                          buf_virt_addr);
}

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

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

/* Allocate buffers for the pool */
static int mvpp2_bm_bufs_add(struct mvpp2_port *port,
                             struct mvpp2_bm_pool *bm_pool, int buf_num)
{
        struct sk_buff *skb;
        int i, buf_size, total_size;
        u32 bm;
        dma_addr_t phys_addr;

        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;
        }

        bm = mvpp2_bm_cookie_pool_set(0, bm_pool->id);
        for (i = 0; i < buf_num; i++) {
                skb = mvpp2_skb_alloc(port, bm_pool, &phys_addr, GFP_KERNEL);
                if (!skb)
                        break;

                mvpp2_pool_refill(port, bm, (u32)phys_addr, (u32)skb);
        }

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

        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;

                /* 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 < rxq_number; 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 < rxq_number; 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;
        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 cpu, cpu_mask = 0;

        for_each_present_cpu(cpu)
                cpu_mask |= 1 << cpu;
        mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
                    MVPP2_ISR_ENABLE_INTERRUPT(cpu_mask));
}

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

        for_each_present_cpu(cpu)
                cpu_mask |= 1 << cpu;
        mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
                    MVPP2_ISR_DISABLE_INTERRUPT(cpu_mask));
}

/* Mask the current CPU's Rx/Tx interrupts */
static void mvpp2_interrupts_mask(void *arg)
{
        struct mvpp2_port *port = arg;

        mvpp2_write(port->priv, MVPP2_ISR_RX_TX_MASK_REG(port->id), 0);
}

/* Unmask the current CPU's Rx/Tx interrupts */
static void mvpp2_interrupts_unmask(void *arg)
{
        struct mvpp2_port *port = arg;

        mvpp2_write(port->priv, MVPP2_ISR_RX_TX_MASK_REG(port->id),
                    (MVPP2_CAUSE_MISC_SUM_MASK |
                     MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK));
}

/* Port configuration routines */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        /* Set refill period to 1 usec, refill tokens
         * and bucket size to maximum
         */
        mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG,
                    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 < rxq_number; lrxq++) {
                queue = port->rxqs[lrxq]->id;
                val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
                val |= MVPP2_SNOOP_PKT_SIZE_MASK |
                           MVPP2_SNOOP_BUF_HDR_MASK;
                mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
        }

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

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

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

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

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

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

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

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

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

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

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

/* Rx descriptors helper methods */

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

        return val & MVPP2_RXQ_OCCUPIED_MASK;
}

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

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

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

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

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

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

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

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

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

/* Obtain BM cookie information from descriptor */
static u32 mvpp2_bm_cookie_build(struct mvpp2_rx_desc *rx_desc)
{
        int pool = (rx_desc->status & MVPP2_RXD_BM_POOL_ID_MASK) >>
                   MVPP2_RXD_BM_POOL_ID_OFFS;
        int cpu = smp_processor_id();

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

/* Tx descriptors helper methods */

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

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

        return val & MVPP2_TXQ_PENDING_MASK;
}

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

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

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


/* Check if there are enough free descriptors in aggregated txq.
 * If not, update the number of occupied descriptors and repeat the check.
 */
static int mvpp2_aggr_desc_num_check(struct mvpp2 *priv,
                                     struct mvpp2_tx_queue *aggr_txq, int num)
{
        if ((aggr_txq->count + num) > 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) > aggr_txq->size)
                return -ENOMEM;

        return 0;
}

/* Reserved Tx descriptors allocation request */
static int mvpp2_txq_alloc_reserved_desc(struct mvpp2 *priv,
                                         struct mvpp2_tx_queue *txq, int num)
{
        u32 val;

        val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num;
        mvpp2_write(priv, MVPP2_TXQ_RSVD_REQ_REG, val);

        val = mvpp2_read(priv, 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
 */
static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port,
                                           struct mvpp2_tx_queue *txq)
{
        u32 val;

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

        return (val & MVPP2_TRANSMITTED_COUNT_MASK) >>
                MVPP2_TRANSMITTED_COUNT_OFFSET;
}

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

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

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

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

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

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

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

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

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

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

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

/* 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, u32 pkts)
{
        u32 val;

        val = (pkts & MVPP2_OCCUPIED_THRESH_MASK);
        mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id);
        mvpp2_write(port->priv, MVPP2_RXQ_THRESH_REG, val);

        rxq->pkts_coal = pkts;
}

/* 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, u32 usec)
{
        u32 val;

        val = (port->priv->tclk / USEC_PER_SEC) * usec;
        mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val);

        rxq->time_coal = usec;
}

/* 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++) {
                dma_addr_t buf_phys_addr =
                                    txq_pcpu->tx_buffs[txq_pcpu->txq_get_index];
                struct sk_buff *skb = txq_pcpu->tx_skb[txq_pcpu->txq_get_index];

                mvpp2_txq_inc_get(txq_pcpu);

                dma_unmap_single(port->dev->dev.parent, buf_phys_addr,
                                 skb_headlen(skb), DMA_TO_DEVICE);
                if (!skb)
                        continue;
                dev_kfree_skb_any(skb);
        }
}

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->size - txq_pcpu->count >= MAX_SKB_FRAGS + 1)
                        netif_tx_wake_queue(nq);
}

static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause)
{
        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 = this_cpu_ptr(txq->pcpu);

                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 desc_num, int cpu,
                               struct mvpp2 *priv)
{
        /* Allocate memory for TX descriptors */
        aggr_txq->descs = dma_alloc_coherent(&pdev->dev,
                                desc_num * MVPP2_DESC_ALIGNED_SIZE,
                                &aggr_txq->descs_phys, GFP_KERNEL);
        if (!aggr_txq->descs)
                return -ENOMEM;

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

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

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

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

        return 0;
}

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

{
        rxq->size = port->rx_ring_size;

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

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

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

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

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

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

        /* Set coalescing pkts and time */
        mvpp2_rx_pkts_coal_set(port, rxq, rxq->pkts_coal);
        mvpp2_rx_time_coal_set(port, rxq, rxq->time_coal);

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

        return 0;
}

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

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

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

                mvpp2_pool_refill(port, bm, rx_desc->buf_phys_addr,
                                  rx_desc->buf_cookie);
        }
        mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received);
}

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

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

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

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

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

        txq->size = port->tx_ring_size;

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

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

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

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

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

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

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

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

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

        for_each_present_cpu(cpu) {
                txq_pcpu = per_cpu_ptr(txq->pcpu, cpu);
                txq_pcpu->size = txq->size;
                txq_pcpu->tx_skb = kmalloc(txq_pcpu->size *
                                           sizeof(*txq_pcpu->tx_skb),
                                           GFP_KERNEL);
                if (!txq_pcpu->tx_skb)
                        goto error;

                txq_pcpu->tx_buffs = kmalloc(txq_pcpu->size *
                                             sizeof(dma_addr_t), GFP_KERNEL);
                if (!txq_pcpu->tx_buffs)
                        goto error;

                txq_pcpu->count = 0;
                txq_pcpu->reserved_num = 0;
                txq_pcpu->txq_put_index = 0;
                txq_pcpu->txq_get_index = 0;
        }

        return 0;

error:
        for_each_present_cpu(cpu) {
                txq_pcpu = per_cpu_ptr(txq->pcpu, cpu);
                kfree(txq_pcpu->tx_skb);
                kfree(txq_pcpu->tx_buffs);
        }

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

        return -ENOMEM;
}

/* 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->tx_skb);
                kfree(txq_pcpu->tx_buffs);
        }

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

        txq->descs             = NULL;
        txq->last_desc         = 0;
        txq->next_desc_to_proc = 0;
        txq->descs_phys        = 0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

err_cleanup:
        mvpp2_cleanup_rxqs(port);
        return err;
}

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

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

        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_port *port = (struct mvpp2_port *)dev_id;

        mvpp2_interrupts_disable(port);

        napi_schedule(&port->napi);

        return IRQ_HANDLED;
}

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

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

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

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

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

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

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

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

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

        if (status_change) {
                if (phydev->link) {
                        val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
                        val |= (MVPP2_GMAC_FORCE_LINK_PASS |
                                MVPP2_GMAC_FORCE_LINK_DOWN);
                        writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
                        mvpp2_egress_enable(port);
                        mvpp2_ingress_enable(port);
                } else {
                        mvpp2_ingress_disable(port);
                        mvpp2_egress_disable(port);
                }
                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 = ktime_set(0, 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 << txq_number) - 1;
        tx_todo = mvpp2_tx_done(port, cause);

        /* 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 = rx_desc->status;

        switch (status & MVPP2_RXD_ERR_CODE_MASK) {
        case MVPP2_RXD_ERR_CRC:
                netdev_err(port->dev, "bad rx status %08x (crc error), size=%d\n",
                           status, rx_desc->data_size);
                break;
        case MVPP2_RXD_ERR_OVERRUN:
                netdev_err(port->dev, "bad rx status %08x (overrun error), size=%d\n",
                           status, rx_desc->data_size);
                break;
        case MVPP2_RXD_ERR_RESOURCE:
                netdev_err(port->dev, "bad rx status %08x (resource error), size=%d\n",
                           status, rx_desc->data_size);
                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,
                           u32 bm, int is_recycle)
{
        struct sk_buff *skb;
        dma_addr_t phys_addr;

        if (is_recycle &&
            (atomic_read(&bm_pool->in_use) < bm_pool->in_use_thresh))
                return 0;

        /* No recycle or too many buffers are in use, so allocate a new skb */
        skb = mvpp2_skb_alloc(port, bm_pool, &phys_addr, GFP_ATOMIC);
        if (!skb)
                return -ENOMEM;

        mvpp2_pool_refill(port, bm, (u32)phys_addr, (u32)skb);
        atomic_dec(&bm_pool->in_use);
        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;
}

static void mvpp2_buff_hdr_rx(struct mvpp2_port *port,
                              struct mvpp2_rx_desc *rx_desc)
{
        struct mvpp2_buff_hdr *buff_hdr;
        struct sk_buff *skb;
        u32 rx_status = rx_desc->status;
        u32 buff_phys_addr;
        u32 buff_virt_addr;
        u32 buff_phys_addr_next;
        u32 buff_virt_addr_next;
        int mc_id;
        int pool_id;

        pool_id = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >>
                   MVPP2_RXD_BM_POOL_ID_OFFS;
        buff_phys_addr = rx_desc->buf_phys_addr;
        buff_virt_addr = rx_desc->buf_cookie;

        do {
                skb = (struct sk_buff *)buff_virt_addr;
                buff_hdr = (struct mvpp2_buff_hdr *)skb->head;

                mc_id = MVPP2_B_HDR_INFO_MC_ID(buff_hdr->info);

                buff_phys_addr_next = buff_hdr->next_buff_phys_addr;
                buff_virt_addr_next = buff_hdr->next_buff_virt_addr;

                /* Release buffer */
                mvpp2_bm_pool_mc_put(port, pool_id, buff_phys_addr,
                                     buff_virt_addr, mc_id);

                buff_phys_addr = buff_phys_addr_next;
                buff_virt_addr = buff_virt_addr_next;

        } while (!MVPP2_B_HDR_INFO_IS_LAST(buff_hdr->info));
}

/* Main rx processing */
static int mvpp2_rx(struct mvpp2_port *port, 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;
                dma_addr_t phys_addr;
                u32 bm, rx_status;
                int pool, rx_bytes, err;

                rx_done++;
                rx_status = rx_desc->status;
                rx_bytes = rx_desc->data_size - MVPP2_MH_SIZE;
                phys_addr = rx_desc->buf_phys_addr;

                bm = mvpp2_bm_cookie_build(rx_desc);
                pool = mvpp2_bm_cookie_pool_get(bm);
                bm_pool = &port->priv->bm_pools[pool];
                /* Check if buffer header is used */
                if (rx_status & MVPP2_RXD_BUF_HDR) {
                        mvpp2_buff_hdr_rx(port, rx_desc);
                        continue;
                }

                /* 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_pool_refill(port, bm, rx_desc->buf_phys_addr,
                                          rx_desc->buf_cookie);
                        continue;
                }

                skb = (struct sk_buff *)rx_desc->buf_cookie;

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

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

                rcvd_pkts++;
                rcvd_bytes += rx_bytes;
                atomic_inc(&bm_pool->in_use);

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

                napi_gro_receive(&port->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 device *dev, struct mvpp2_tx_queue *txq,
                  struct mvpp2_tx_desc *desc)
{
        dma_unmap_single(dev, desc->buf_phys_addr,
                         desc->data_size, 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_phys_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);
                tx_desc->phys_txq = txq->id;
                tx_desc->data_size = frag->size;

                buf_phys_addr = dma_map_single(port->dev->dev.parent, addr,
                                               tx_desc->data_size,
                                               DMA_TO_DEVICE);
                if (dma_mapping_error(port->dev->dev.parent, buf_phys_addr)) {
                        mvpp2_txq_desc_put(txq);
                        goto error;
                }

                tx_desc->packet_offset = buf_phys_addr & MVPP2_TX_DESC_ALIGN;
                tx_desc->buf_phys_addr = buf_phys_addr & (~MVPP2_TX_DESC_ALIGN);

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

        return 0;

error:
        /* 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->dev->dev.parent, txq, tx_desc);
        }

        return -ENOMEM;
}

/* 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_phys_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()];

        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);
        tx_desc->phys_txq = txq->id;
        tx_desc->data_size = skb_headlen(skb);

        buf_phys_addr = dma_map_single(dev->dev.parent, skb->data,
                                       tx_desc->data_size, DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev->dev.parent, buf_phys_addr))) {
                mvpp2_txq_desc_put(txq);
                frags = 0;
                goto out;
        }
        tx_desc->packet_offset = buf_phys_addr & MVPP2_TX_DESC_ALIGN;
        tx_desc->buf_phys_addr = buf_phys_addr & ~MVPP2_TX_DESC_ALIGN;

        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;
                tx_desc->command = tx_cmd;
                mvpp2_txq_inc_put(txq_pcpu, skb, tx_desc);
        } else {
                /* First but not Last */
                tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE;
                tx_desc->command = tx_cmd;
                mvpp2_txq_inc_put(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->dev->dev.parent, txq, tx_desc);
                        frags = 0;
                        goto out;
                }
        }

        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->size - txq_pcpu->count < MAX_SKB_FRAGS + 1) {
                struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id);

                netif_tx_stop_queue(nq);
        }
out:
        if (frags > 0) {
                struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);

                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 (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 (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_misc;
        int rx_done = 0;
        struct mvpp2_port *port = netdev_priv(napi->dev);

        /* 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_read(port->priv,
                                 MVPP2_ISR_RX_TX_CAUSE_REG(port->id));
        cause_rx_tx &= ~MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;
        cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK;

        if (cause_misc) {
                mvpp2_cause_error(port->dev, cause_misc);

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

        cause_rx = cause_rx_tx & MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK;

        /* Process RX packets */
        cause_rx |= port->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, 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(napi);

                mvpp2_interrupts_enable(port);
        }
        port->pending_cause_rx = cause_rx;
        return rx_done;
}

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

        napi_enable(&port->napi);

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

        mvpp2_port_enable(port);
        phy_start(port->phy_dev);
        netif_tx_start_all_queues(port->dev);
}

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

        mdelay(10);

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

        napi_disable(&port->napi);

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

        mvpp2_egress_disable(port);
        mvpp2_port_disable(port);
        phy_stop(port->phy_dev);
}

/* Return positive if MTU is valid */
static inline int mvpp2_check_mtu_valid(struct net_device *dev, int mtu)
{
        if (mtu < 68) {
                netdev_err(dev, "cannot change mtu to less than 68\n");
                return -EINVAL;
        }

        /* 9676 == 9700 - 20 and rounding to 8 */
        if (mtu > 9676) {
                netdev_info(dev, "illegal MTU value %d, round to 9676\n", mtu);
                mtu = 9676;
        }

        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);
        }

        return mtu;
}

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)
                new_rx_pending = MVPP2_MAX_RXD;
        else if (!IS_ALIGNED(ring->rx_pending, 16))
                new_rx_pending = ALIGN(ring->rx_pending, 16);

        if (ring->tx_pending > MVPP2_MAX_TXD)
                new_tx_pending = MVPP2_MAX_TXD;
        else if (!IS_ALIGNED(ring->tx_pending, 32))
                new_tx_pending = ALIGN(ring->tx_pending, 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 mvpp2_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;

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

        return 0;
}

static void mvpp2_phy_disconnect(struct mvpp2_port *port)
{
        phy_disconnect(port->phy_dev);
        port->phy_dev = NULL;
}

static int mvpp2_open(struct net_device *dev)
{
        struct mvpp2_port *port = netdev_priv(dev);
        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 = request_irq(port->irq, mvpp2_isr, 0, dev->name, port);
        if (err) {
                netdev_err(port->dev, "cannot request IRQ %d\n", port->irq);
                goto err_cleanup_txqs;
        }

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

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

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

        mvpp2_start_dev(port);

        return 0;

err_free_irq:
        free_irq(port->irq, 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;
        int cpu;

        mvpp2_stop_dev(port);
        mvpp2_phy_disconnect(port);

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

        free_irq(port->irq, port);
        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);

        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 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 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 error;
out_start:
        mvpp2_start_dev(port);
        mvpp2_egress_enable(port);
        mvpp2_ingress_enable(port);
        return 0;

error:
        netdev_err(dev, "fail 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;

        mtu = mvpp2_check_mtu_valid(dev, mtu);
        if (mtu < 0) {
                err = mtu;
                goto error;
        }

        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 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 error;

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

        return 0;

error:
        netdev_err(dev, "fail to change MTU\n");
        return err;
}

static struct rtnl_link_stats64 *
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;

        return stats;
}

static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
        struct mvpp2_port *port = netdev_priv(dev);
        int ret;

        if (!port->phy_dev)
                return -ENOTSUPP;

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

        return ret;
}

/* Ethtool methods */

/* Get settings (phy address, speed) for ethtools */
static int mvpp2_ethtool_get_settings(struct net_device *dev,
                                      struct ethtool_cmd *cmd)
{
        struct mvpp2_port *port = netdev_priv(dev);

        if (!port->phy_dev)
                return -ENODEV;
        return phy_ethtool_gset(port->phy_dev, cmd);
}

/* Set settings (phy address, speed) for ethtools */
static int mvpp2_ethtool_set_settings(struct net_device *dev,
                                      struct ethtool_cmd *cmd)
{
        struct mvpp2_port *port = netdev_priv(dev);

        if (!port->phy_dev)
                return -ENODEV;
        return phy_ethtool_sset(port->phy_dev, cmd);
}

/* 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 < rxq_number; 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, rxq->pkts_coal);
                mvpp2_rx_time_coal_set(port, rxq, rxq->time_coal);
        }

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

                txq->done_pkts_coal = c->tx_max_coalesced_frames;
        }

        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;
        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;
        ring->tx_max_pending = MVPP2_MAX_TXD;
        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, "fail 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 = {
        .get_link       = ethtool_op_get_link,
        .get_settings   = mvpp2_ethtool_get_settings,
        .set_settings   = mvpp2_ethtool_set_settings,
        .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,
};

/* Driver initialization */

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

/* Initialize port HW */
static int mvpp2_port_init(struct 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;

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

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

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

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

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

                txq->pcpu = 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, rxq_number, 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 < rxq_number; queue++) {
                struct mvpp2_rx_queue *rxq;

                /* Map physical Rx queue to port's logical Rx queue */
                rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL);
                if (!rxq)
                        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;
        }

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

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

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

        mvpp2_ingress_disable(port);

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

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

        /* Provide an initial Rx packet size */
        port->pkt_size = MVPP2_RX_PKT_SIZE(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 < txq_number; queue++) {
                if (!port->txqs[queue])
                        continue;
                free_percpu(port->txqs[queue]->pcpu);
        }
        return err;
}

/* Ports initialization */
static int mvpp2_port_probe(struct platform_device *pdev,
                            struct device_node *port_node,
                            struct mvpp2 *priv,
                            int *next_first_rxq)
{
        struct device_node *phy_node;
        struct mvpp2_port *port;
        struct mvpp2_port_pcpu *port_pcpu;
        struct net_device *dev;
        struct resource *res;
        const char *dt_mac_addr;
        const char *mac_from;
        char hw_mac_addr[ETH_ALEN];
        u32 id;
        int features;
        int phy_mode;
        int priv_common_regs_num = 2;
        int err, i, cpu;

        dev = alloc_etherdev_mqs(sizeof(struct mvpp2_port), txq_number,
                                 rxq_number);
        if (!dev)
                return -ENOMEM;

        phy_node = of_parse_phandle(port_node, "phy", 0);
        if (!phy_node) {
                dev_err(&pdev->dev, "missing phy\n");
                err = -ENODEV;
                goto err_free_netdev;
        }

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

        if (of_property_read_u32(port_node, "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;
        dev->watchdog_timeo = 5 * HZ;
        dev->netdev_ops = &mvpp2_netdev_ops;
        dev->ethtool_ops = &mvpp2_eth_tool_ops;

        port = netdev_priv(dev);

        port->irq = irq_of_parse_and_map(port_node, 0);
        if (port->irq <= 0) {
                err = -EINVAL;
                goto err_free_netdev;
        }

        if (of_property_read_bool(port_node, "marvell,loopback"))
                port->flags |= MVPP2_F_LOOPBACK;

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

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

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

        dt_mac_addr = of_get_mac_address(port_node);
        if (dt_mac_addr && is_valid_ether_addr(dt_mac_addr)) {
                mac_from = "device tree";
                ether_addr_copy(dev->dev_addr, dt_mac_addr);
        } else {
                mvpp2_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);
                } else {
                        mac_from = "random";
                        eth_hw_addr_random(dev);
                }
        }

        port->tx_ring_size = MVPP2_MAX_TXD;
        port->rx_ring_size = MVPP2_MAX_RXD;
        port->dev = dev;
        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_power_up(port);

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

        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);
        }

        netif_napi_add(dev, &port->napi, mvpp2_poll, NAPI_POLL_WEIGHT);
        features = NETIF_F_SG | NETIF_F_IP_CSUM;
        dev->features = features | NETIF_F_RXCSUM;
        dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO;
        dev->vlan_features |= features;

        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);

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

err_free_port_pcpu:
        free_percpu(port->pcpu);
err_free_txq_pcpu:
        for (i = 0; i < txq_number; i++)
                free_percpu(port->txqs[i]->pcpu);
err_free_stats:
        free_percpu(port->stats);
err_free_irq:
        irq_dispose_mapping(port->irq);
err_free_netdev:
        free_netdev(dev);
        return err;
}

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

        unregister_netdev(port->dev);
        free_percpu(port->pcpu);
        free_percpu(port->stats);
        for (i = 0; i < txq_number; i++)
                free_percpu(port->txqs[i]->pcpu);
        irq_dispose_mapping(port->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);
                mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port),
                            MVPP2_RX_FIFO_PORT_ATTR_SIZE);
        }

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

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

        /* Checks for hardware constraints */
        if (rxq_number % 4 || (rxq_number > MVPP2_MAX_RXQ) ||
            (txq_number > MVPP2_MAX_TXQ)) {
                dev_err(&pdev->dev, "invalid queue size parameter\n");
                return -EINVAL;
        }

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

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

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

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

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

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

        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)
{
        struct device_node *dn = pdev->dev.of_node;
        struct device_node *port_node;
        struct mvpp2 *priv;
        struct resource *res;
        int port_count, first_rxq;
        int err;

        priv = devm_kzalloc(&pdev->dev, sizeof(struct mvpp2), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

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

        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);

        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;

        /* Get system's tclk rate */
        priv->tclk = clk_get_rate(priv->pp_clk);

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

        port_count = of_get_available_child_count(dn);
        if (port_count == 0) {
                dev_err(&pdev->dev, "no ports enabled\n");
                err = -ENODEV;
                goto err_gop_clk;
        }

        priv->port_list = devm_kcalloc(&pdev->dev, port_count,
                                      sizeof(struct mvpp2_port *),
                                      GFP_KERNEL);
        if (!priv->port_list) {
                err = -ENOMEM;
                goto err_gop_clk;
        }

        /* Initialize ports */
        first_rxq = 0;
        for_each_available_child_of_node(dn, port_node) {
                err = mvpp2_port_probe(pdev, port_node, priv, &first_rxq);
                if (err < 0)
                        goto err_gop_clk;
        }

        platform_set_drvdata(pdev, priv);
        return 0;

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 device_node *dn = pdev->dev.of_node;
        struct device_node *port_node;
        int i = 0;

        for_each_available_child_of_node(dn, port_node) {
                if (priv->port_list[i])
                        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_phys);
        }

        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" },
        { }
};
MODULE_DEVICE_TABLE(of, mvpp2_match);

static struct platform_driver mvpp2_driver = {
        .probe = mvpp2_probe,
        .remove = mvpp2_remove,
        .driver = {
                .name = MVPP2_DRIVER_NAME,
                .of_match_table = mvpp2_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");