// SPDX-License-Identifier: GPL-2.0
/*
 * Header Parser helpers for Marvell PPv2 Network Controller
 *
 * Copyright (C) 2014 Marvell
 *
 * Marcin Wojtas <mw@semihalf.com>
 */

#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <uapi/linux/ppp_defs.h>
#include <net/ip.h>
#include <net/ipv6.h>

#include "mvpp2.h"
#include "mvpp2_prs.h"

/* 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[MVPP2_PRS_TCAM_INV_WORD] &= ~MVPP2_PRS_TCAM_INV_MASK;

        /* 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[i]);

        /* 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[i]);

        return 0;
}

/* Initialize tcam entry from hw */
int mvpp2_prs_init_from_hw(struct mvpp2 *priv, struct mvpp2_prs_entry *pe,
                           int tid)
{
        int i;

        if (tid > MVPP2_PRS_TCAM_SRAM_SIZE - 1)
                return -EINVAL;

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

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

        pe->tcam[MVPP2_PRS_TCAM_INV_WORD] = mvpp2_read(priv,
                              MVPP2_PRS_TCAM_DATA_REG(MVPP2_PRS_TCAM_INV_WORD));
        if (pe->tcam[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[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[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)
{
        pe->tcam[MVPP2_PRS_TCAM_LU_WORD] &= ~MVPP2_PRS_TCAM_LU(MVPP2_PRS_LU_MASK);
        pe->tcam[MVPP2_PRS_TCAM_LU_WORD] &= ~MVPP2_PRS_TCAM_LU_EN(MVPP2_PRS_LU_MASK);
        pe->tcam[MVPP2_PRS_TCAM_LU_WORD] |= MVPP2_PRS_TCAM_LU(lu & MVPP2_PRS_LU_MASK);
        pe->tcam[MVPP2_PRS_TCAM_LU_WORD] |= MVPP2_PRS_TCAM_LU_EN(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)
{
        if (add)
                pe->tcam[MVPP2_PRS_TCAM_PORT_WORD] &= ~MVPP2_PRS_TCAM_PORT_EN(BIT(port));
        else
                pe->tcam[MVPP2_PRS_TCAM_PORT_WORD] |= MVPP2_PRS_TCAM_PORT_EN(BIT(port));
}

/* Update port map in tcam sw entry */
static void mvpp2_prs_tcam_port_map_set(struct mvpp2_prs_entry *pe,
                                        unsigned int ports)
{
        pe->tcam[MVPP2_PRS_TCAM_PORT_WORD] &= ~MVPP2_PRS_TCAM_PORT(MVPP2_PRS_PORT_MASK);
        pe->tcam[MVPP2_PRS_TCAM_PORT_WORD] &= ~MVPP2_PRS_TCAM_PORT_EN(MVPP2_PRS_PORT_MASK);
        pe->tcam[MVPP2_PRS_TCAM_PORT_WORD] |= MVPP2_PRS_TCAM_PORT_EN(~ports & MVPP2_PRS_PORT_MASK);
}

/* Obtain port map from tcam sw entry */
unsigned int mvpp2_prs_tcam_port_map_get(struct mvpp2_prs_entry *pe)
{
        return (~pe->tcam[MVPP2_PRS_TCAM_PORT_WORD] >> 24) & 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)
{
        int pos = MVPP2_PRS_BYTE_IN_WORD(offs) * BITS_PER_BYTE;

        pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] &= ~(0xff << pos);
        pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] &= ~(MVPP2_PRS_TCAM_EN(0xff) << pos);
        pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] |= byte << pos;
        pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] |= MVPP2_PRS_TCAM_EN(enable << pos);
}

/* Get byte of data and its enable bits from tcam sw entry */
void mvpp2_prs_tcam_data_byte_get(struct mvpp2_prs_entry *pe,
                                  unsigned int offs, unsigned char *byte,
                                  unsigned char *enable)
{
        int pos = MVPP2_PRS_BYTE_IN_WORD(offs) * BITS_PER_BYTE;

        *byte = (pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] >> pos) & 0xff;
        *enable = (pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] >> (pos + 16)) & 0xff;
}

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

        tcam_data = pe->tcam[MVPP2_PRS_BYTE_TO_WORD(offs)] & 0xffff;
        return tcam_data == data;
}

/* 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;

        for (i = 0; i < MVPP2_PRS_AI_BITS; i++) {
                if (!(enable & BIT(i)))
                        continue;

                if (bits & BIT(i))
                        pe->tcam[MVPP2_PRS_TCAM_AI_WORD] |= BIT(i);
                else
                        pe->tcam[MVPP2_PRS_TCAM_AI_WORD] &= ~BIT(i);
        }

        pe->tcam[MVPP2_PRS_TCAM_AI_WORD] |= MVPP2_PRS_TCAM_AI_EN(enable);
}

/* Get ai bits from tcam sw entry */
static int mvpp2_prs_tcam_ai_get(struct mvpp2_prs_entry *pe)
{
        return pe->tcam[MVPP2_PRS_TCAM_AI_WORD] & MVPP2_PRS_AI_MASK;
}

/* 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 vid in tcam sw entry */
static void mvpp2_prs_match_vid(struct mvpp2_prs_entry *pe, int offset,
                                unsigned short vid)
{
        mvpp2_prs_tcam_data_byte_set(pe, offset + 0, (vid & 0xf00) >> 8, 0xf);
        mvpp2_prs_tcam_data_byte_set(pe, offset + 1, vid & 0xff, 0xff);
}

/* Set bits in sram sw entry */
static void mvpp2_prs_sram_bits_set(struct mvpp2_prs_entry *pe, int bit_num,
                                    u32 val)
{
        pe->sram[MVPP2_BIT_TO_WORD(bit_num)] |= (val << (MVPP2_BIT_IN_WORD(bit_num)));
}

/* Clear bits in sram sw entry */
static void mvpp2_prs_sram_bits_clear(struct mvpp2_prs_entry *pe, int bit_num,
                                      u32 val)
{
        pe->sram[MVPP2_BIT_TO_WORD(bit_num)] &= ~(val << (MVPP2_BIT_IN_WORD(bit_num)));
}

/* 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++) {
                if (!(mask & BIT(i)))
                        continue;

                if (bits & BIT(i))
                        mvpp2_prs_sram_bits_set(pe, MVPP2_PRS_SRAM_RI_OFFS + i,
                                                1);
                else
                        mvpp2_prs_sram_bits_clear(pe,
                                                  MVPP2_PRS_SRAM_RI_OFFS + 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[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;

        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, MVPP2_PRS_SRAM_AI_OFFS + i,
                                                1);
                else
                        mvpp2_prs_sram_bits_clear(pe,
                                                  MVPP2_PRS_SRAM_AI_OFFS + 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;
        /* ai is stored on bits 90->97; so it spreads across two u32 */
        int ai_off = MVPP2_BIT_TO_WORD(MVPP2_PRS_SRAM_AI_OFFS);
        int ai_shift = MVPP2_BIT_IN_WORD(MVPP2_PRS_SRAM_AI_OFFS);

        bits = (pe->sram[ai_off] >> ai_shift) |
               (pe->sram[ai_off + 1] << (32 - 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[MVPP2_BIT_TO_WORD(MVPP2_PRS_SRAM_SHIFT_OFFS)] |=
                shift & MVPP2_PRS_SRAM_SHIFT_MASK;

        /* 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 & MVPP2_PRS_SRAM_UDF_MASK);

        /* 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 & MVPP2_PRS_SRAM_OP_SEL_UDF_MASK);

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

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

        /* 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;

                mvpp2_prs_init_from_hw(priv, &pe, tid);
                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 tid;
        }

        return -ENOENT;
}

/* 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);

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

        return -EINVAL;
}

/* Drop flow control pause frames */
static void mvpp2_prs_drop_fc(struct mvpp2 *priv)
{
        unsigned char da[ETH_ALEN] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 };
        struct mvpp2_prs_entry pe;
        unsigned int len;

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

        /* For all ports - drop flow control frames */
        pe.index = MVPP2_PE_FC_DROP;
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);

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

        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);

        /* Mask 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);
}

/* 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 */
                mvpp2_prs_init_from_hw(priv, &pe, MVPP2_PE_DROP_ALL);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);
                pe.index = MVPP2_PE_DROP_ALL;

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

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

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

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

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

        mvpp2_prs_hw_write(priv, &pe);
}

/* Set port to unicast or multicast promiscuous mode */
void mvpp2_prs_mac_promisc_set(struct mvpp2 *priv, int port,
                               enum mvpp2_prs_l2_cast l2_cast, bool add)
{
        struct mvpp2_prs_entry pe;
        unsigned char cast_match;
        unsigned int ri;
        int tid;

        if (l2_cast == MVPP2_PRS_L2_UNI_CAST) {
                cast_match = MVPP2_PRS_UCAST_VAL;
                tid = MVPP2_PE_MAC_UC_PROMISCUOUS;
                ri = MVPP2_PRS_RI_L2_UCAST;
        } else {
                cast_match = MVPP2_PRS_MCAST_VAL;
                tid = MVPP2_PE_MAC_MC_PROMISCUOUS;
                ri = MVPP2_PRS_RI_L2_MCAST;
        }

        /* promiscuous mode - Accept unknown unicast or multicast packets */
        if (priv->prs_shadow[tid].valid) {
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        } else {
                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);
                pe.index = tid;

                /* 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, ri, MVPP2_PRS_RI_L2_CAST_MASK);

                /* Match UC or MC addresses */
                mvpp2_prs_tcam_data_byte_set(&pe, 0, cast_match,
                                             MVPP2_PRS_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);
}

/* 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 */
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_DSA);
                pe.index = tid;

                /* 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);

                        /* Set ai bits for next iteration */
                        if (extend)
                                mvpp2_prs_sram_ai_update(&pe, 1,
                                                        MVPP2_PRS_SRAM_AI_MASK);
                        else
                                mvpp2_prs_sram_ai_update(&pe, 0,
                                                        MVPP2_PRS_SRAM_AI_MASK);

                        /* Set result info bits to 'single vlan' */
                        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_VLAN_SINGLE,
                                                 MVPP2_PRS_RI_VLAN_MASK);
                        /* If packet is tagged continue check vid filtering */
                        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VID);
                } else {
                        /* Shift 4 bytes for DSA tag or 8 bytes for EDSA tag*/
                        mvpp2_prs_sram_shift_set(&pe, shift,
                                        MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

                        /* 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 */
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        } else {
                /* Entry doesn't exist - create new */
                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_DSA);
                pe.index = tid;

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

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

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

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

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

        mvpp2_prs_hw_write(priv, &pe);
}

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

        /* 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;

                mvpp2_prs_init_from_hw(priv, &pe, tid);
                match = mvpp2_prs_tcam_data_cmp(&pe, 0, 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 tid;
        }

        return -ENOENT;
}

/* 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;

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

        tid = mvpp2_prs_vlan_find(priv, tpid, ai);

        if (tid < 0) {
                /* 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;

                /* 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;

                        mvpp2_prs_init_from_hw(priv, &pe, tid_aux);
                        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)
                        return -EINVAL;

                memset(&pe, 0, sizeof(pe));
                pe.index = tid;
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VLAN);

                mvpp2_prs_match_etype(&pe, 0, tpid);

                /* VLAN tag detected, proceed with VID filtering */
                mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VID);

                /* 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);
        } else {
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        }
        /* Update ports' mask */
        mvpp2_prs_tcam_port_map_set(&pe, port_map);

        mvpp2_prs_hw_write(priv, &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 int mvpp2_prs_double_vlan_find(struct mvpp2 *priv, unsigned short tpid1,
                                      unsigned short tpid2)
{
        struct mvpp2_prs_entry pe;
        int tid;

        /* 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;

                mvpp2_prs_init_from_hw(priv, &pe, tid);

                match = mvpp2_prs_tcam_data_cmp(&pe, 0, tpid1) &&
                        mvpp2_prs_tcam_data_cmp(&pe, 4, 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 tid;
        }

        return -ENOENT;
}

/* 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)
{
        int tid_aux, tid, ai, ret = 0;
        struct mvpp2_prs_entry pe;

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

        tid = mvpp2_prs_double_vlan_find(priv, tpid1, tpid2);

        if (tid < 0) {
                /* 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;

                /* Set ai value for new double vlan entry */
                ai = mvpp2_prs_double_vlan_ai_free_get(priv);
                if (ai < 0)
                        return ai;

                /* 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;

                        mvpp2_prs_init_from_hw(priv, &pe, tid_aux);
                        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)
                        return -ERANGE;

                memset(&pe, 0, sizeof(pe));
                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VLAN);
                pe.index = tid;

                priv->prs_double_vlans[ai] = true;

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

                mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VLAN);
                /* Shift 4 bytes - skip outer vlan tag */
                mvpp2_prs_sram_shift_set(&pe, 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);
        } else {
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        }

        /* Update ports' mask */
        mvpp2_prs_tcam_port_map_set(&pe, port_map);
        mvpp2_prs_hw_write(priv, &pe);

        return ret;
}

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

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

        /* Not fragmented packet */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
        pe.index = tid;

        /* 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 */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3, -4,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);
        mvpp2_prs_sram_ai_update(&pe, 0, MVPP2_PRS_IPV4_DIP_AI_BIT);
        mvpp2_prs_sram_ri_update(&pe, ri, ri_mask | MVPP2_PRS_RI_IP_FRAG_MASK);

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

        mvpp2_prs_tcam_data_byte_set(&pe, 5, proto, MVPP2_PRS_TCAM_PROTO_MASK);
        mvpp2_prs_tcam_ai_update(&pe, 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);

        /* 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[MVPP2_PRS_SRAM_RI_WORD] = 0x0;
        pe.sram[MVPP2_PRS_SRAM_RI_CTRL_WORD] = 0x0;
        mvpp2_prs_sram_ri_update(&pe, ri, ri_mask);

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

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

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

        return 0;
}

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

        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP4);
        pe.index = tid;

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

        /* Go again to ipv4 */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);

        mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
                                 MVPP2_PRS_IPV4_DIP_AI_BIT);

        /* Shift back to IPv4 proto */
        mvpp2_prs_sram_shift_set(&pe, -12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        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);

        return 0;
}

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

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

        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = tid;

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_ri_update(&pe, ri, ri_mask);
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                  sizeof(struct ipv6hdr) - 6,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

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

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

        return 0;
}

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

        if (l3_cast != MVPP2_PRS_L3_MULTI_CAST)
                return -EINVAL;

        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = tid;

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

        mvpp2_prs_tcam_data_byte_set(&pe, 0, MVPP2_PRS_IPV6_MC,
                                     MVPP2_PRS_IPV6_MC_MASK);
        mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_IP6);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        /* Set MH entry that skip parser */
        pe.index = MVPP2_PE_MH_SKIP_PRS;
        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_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);

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

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

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

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

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

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

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

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

        /* Create dummy entries for drop all and promiscuous modes */
        mvpp2_prs_drop_fc(priv);
        mvpp2_prs_mac_drop_all_set(priv, 0, false);
        mvpp2_prs_mac_promisc_set(priv, 0, MVPP2_PRS_L2_UNI_CAST, false);
        mvpp2_prs_mac_promisc_set(priv, 0, MVPP2_PRS_L2_MULTI_CAST, false);
}

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

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

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

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

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

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

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

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

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

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

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

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

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

        mvpp2_prs_hw_write(priv, &pe);
}

/* Initialize parser entries for VID filtering */
static void mvpp2_prs_vid_init(struct mvpp2 *priv)
{
        struct mvpp2_prs_entry pe;

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

        /* Set default vid entry */
        pe.index = MVPP2_PE_VID_FLTR_DEFAULT;
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VID);

        mvpp2_prs_tcam_ai_update(&pe, 0, MVPP2_PRS_EDSA_VID_AI_BIT);

        /* Skip VLAN header - Set offset to 4 bytes */
        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);

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);

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

        /* Set default vid entry for extended DSA*/
        memset(&pe, 0, sizeof(pe));

        /* Set default vid entry */
        pe.index = MVPP2_PE_VID_EDSA_FLTR_DEFAULT;
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VID);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_EDSA_VID_AI_BIT,
                                 MVPP2_PRS_EDSA_VID_AI_BIT);

        /* Skip VLAN header - Set offset to 8 bytes */
        mvpp2_prs_sram_shift_set(&pe, MVPP2_VLAN_TAG_EDSA_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);

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);

        /* 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_VID);
        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, ihl;

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

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

        mvpp2_prs_match_etype(&pe, 0, ETH_P_PPP_SES);

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

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

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

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

        mvpp2_prs_match_etype(&pe, 0, ETH_P_ARP);

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

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

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

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

        mvpp2_prs_match_etype(&pe, 0, MVPP2_IP_LBDT_TYPE);

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

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

        /* Ethertype: IPv4 with header length >= 5 */
        for (ihl = MVPP2_PRS_IPV4_IHL_MIN; ihl <= MVPP2_PRS_IPV4_IHL_MAX; ihl++) {
                tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                                MVPP2_PE_LAST_FREE_TID);
                if (tid < 0)
                        return tid;

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

                mvpp2_prs_match_etype(&pe, 0, ETH_P_IP);
                mvpp2_prs_tcam_data_byte_set(&pe, MVPP2_ETH_TYPE_LEN,
                                             MVPP2_PRS_IPV4_HEAD | 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);
                /* goto ipv4 dst-address (skip eth_type + IP-header-size - 4) */
                mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN +
                                         sizeof(struct iphdr) - 4,
                                         MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
                /* Set L4 offset */
                mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                          MVPP2_ETH_TYPE_LEN + (ihl * 4),
                                          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: IPv6 without options */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

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

        mvpp2_prs_match_etype(&pe, 0, ETH_P_IPV6);

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

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

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

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

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

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

        return 0;
}

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

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

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

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

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

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

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

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_VID);

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

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_DBL_VLAN_AI_BIT,
                                 MVPP2_PRS_DBL_VLAN_AI_BIT);
        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_VLAN);
        mvpp2_prs_hw_write(priv, &pe);

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

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

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

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_VLAN);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

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

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

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PPP_IP);

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4_OPT,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);
        /* goto ipv4 dest-address (skip eth_type + IP-header-size - 4) */
        mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN +
                                 sizeof(struct iphdr) - 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_MIN,
                                     MVPP2_PRS_IPV4_HEAD_MASK |
                                     MVPP2_PRS_IPV4_IHL_MASK);

        /* Clear ri before updating */
        pe.sram[MVPP2_PRS_SRAM_RI_WORD] = 0x0;
        pe.sram[MVPP2_PRS_SRAM_RI_CTRL_WORD] = 0x0;
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP4,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);

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

        /* IPv6 over PPPoE */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        pe.index = tid;

        mvpp2_prs_match_etype(&pe, 0, PPP_IPV6);

        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP6);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP6,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);
        /* Jump to 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);
        /* Set L3 offset */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

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

        /* Non-IP over PPPoE */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_PPPOE);
        pe.index = tid;

        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UN,
                                 MVPP2_PRS_RI_L3_PROTO_MASK);

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        /* Set L3 offset even if it's unknown L3 */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
                                  MVPP2_ETH_TYPE_LEN,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

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

        return 0;
}

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

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

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

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

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

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

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

        /* 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 */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3, -4,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);
        mvpp2_prs_sram_ai_update(&pe, 0, 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, 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);

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

        /* Go again to ipv4 */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP4);

        mvpp2_prs_sram_ai_update(&pe, MVPP2_PRS_IPV4_DIP_AI_BIT,
                                 MVPP2_PRS_IPV4_DIP_AI_BIT);

        /* Shift back to IPv4 proto */
        mvpp2_prs_sram_shift_set(&pe, -12, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UCAST,
                                 MVPP2_PRS_RI_L3_ADDR_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);

        return 0;
}

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

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

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

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

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

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

        /* Entry for checking hop limit */
        tid = mvpp2_prs_tcam_first_free(priv, MVPP2_PE_FIRST_FREE_TID,
                                        MVPP2_PE_LAST_FREE_TID);
        if (tid < 0)
                return tid;

        memset(&pe, 0, sizeof(pe));
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_IP6);
        pe.index = tid;

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_UN |
                                 MVPP2_PRS_RI_DROP_MASK,
                                 MVPP2_PRS_RI_L3_PROTO_MASK |
                                 MVPP2_PRS_RI_DROP_MASK);

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

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

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

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L4_OTHER,
                                 MVPP2_PRS_RI_L4_PROTO_MASK);
        /* Set L4 offset relatively to our current place */
        mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L4,
                                  sizeof(struct ipv6hdr) - 4,
                                  MVPP2_PRS_SRAM_OP_SEL_UDF_ADD);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV6_NO_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_NO_EXT_AI_BIT);
        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

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

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

        /* Finished: go to flowid generation */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_GEN_BIT, 1);
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L4_OTHER,
                                 MVPP2_PRS_RI_L4_PROTO_MASK);

        mvpp2_prs_tcam_ai_update(&pe, MVPP2_PRS_IPV6_EXT_AI_BIT,
                                 MVPP2_PRS_IPV6_EXT_AI_BIT);
        /* Unmask all ports */
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);

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

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

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

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

        /* Update shadow table and hw entry */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_IP6);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Find tcam entry with matched pair <vid,port> */
static int mvpp2_prs_vid_range_find(struct mvpp2_port *port, u16 vid, u16 mask)
{
        unsigned char byte[2], enable[2];
        struct mvpp2_prs_entry pe;
        u16 rvid, rmask;
        int tid;

        /* Go through the all entries with MVPP2_PRS_LU_VID */
        for (tid = MVPP2_PRS_VID_PORT_FIRST(port->id);
             tid <= MVPP2_PRS_VID_PORT_LAST(port->id); tid++) {
                if (!port->priv->prs_shadow[tid].valid ||
                    port->priv->prs_shadow[tid].lu != MVPP2_PRS_LU_VID)
                        continue;

                mvpp2_prs_init_from_hw(port->priv, &pe, tid);

                mvpp2_prs_tcam_data_byte_get(&pe, 2, &byte[0], &enable[0]);
                mvpp2_prs_tcam_data_byte_get(&pe, 3, &byte[1], &enable[1]);

                rvid = ((byte[0] & 0xf) << 8) + byte[1];
                rmask = ((enable[0] & 0xf) << 8) + enable[1];

                if (rvid != vid || rmask != mask)
                        continue;

                return tid;
        }

        return -ENOENT;
}

/* Write parser entry for VID filtering */
int mvpp2_prs_vid_entry_add(struct mvpp2_port *port, u16 vid)
{
        unsigned int vid_start = MVPP2_PE_VID_FILT_RANGE_START +
                                 port->id * MVPP2_PRS_VLAN_FILT_MAX;
        unsigned int mask = 0xfff, reg_val, shift;
        struct mvpp2 *priv = port->priv;
        struct mvpp2_prs_entry pe;
        int tid;

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

        /* Scan TCAM and see if entry with this <vid,port> already exist */
        tid = mvpp2_prs_vid_range_find(port, vid, mask);

        reg_val = mvpp2_read(priv, MVPP2_MH_REG(port->id));
        if (reg_val & MVPP2_DSA_EXTENDED)
                shift = MVPP2_VLAN_TAG_EDSA_LEN;
        else
                shift = MVPP2_VLAN_TAG_LEN;

        /* No such entry */
        if (tid < 0) {

                /* Go through all entries from first to last in vlan range */
                tid = mvpp2_prs_tcam_first_free(priv, vid_start,

                                                vid_start +
                                                MVPP2_PRS_VLAN_FILT_MAX_ENTRY);

                /* There isn't room for a new VID filter */
                if (tid < 0)
                        return tid;

                mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VID);
                pe.index = tid;

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(&pe, 0);
        } else {
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        }

        /* Enable the current port */
        mvpp2_prs_tcam_port_set(&pe, port->id, true);

        /* Continue - set next lookup */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);

        /* Skip VLAN header - Set offset to 4 or 8 bytes */
        mvpp2_prs_sram_shift_set(&pe, shift, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        /* Set match on VID */
        mvpp2_prs_match_vid(&pe, MVPP2_PRS_VID_TCAM_BYTE, vid);

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

        /* Update shadow table */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_VID);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

/* Write parser entry for VID filtering */
void mvpp2_prs_vid_entry_remove(struct mvpp2_port *port, u16 vid)
{
        struct mvpp2 *priv = port->priv;
        int tid;

        /* Scan TCAM and see if entry with this <vid,port> already exist */
        tid = mvpp2_prs_vid_range_find(port, vid, 0xfff);

        /* No such entry */
        if (tid < 0)
                return;

        mvpp2_prs_hw_inv(priv, tid);
        priv->prs_shadow[tid].valid = false;
}

/* Remove all existing VID filters on this port */
void mvpp2_prs_vid_remove_all(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        int tid;

        for (tid = MVPP2_PRS_VID_PORT_FIRST(port->id);
             tid <= MVPP2_PRS_VID_PORT_LAST(port->id); tid++) {
                if (priv->prs_shadow[tid].valid) {
                        mvpp2_prs_hw_inv(priv, tid);
                        priv->prs_shadow[tid].valid = false;
                }
        }
}

/* Remove VID filering entry for this port */
void mvpp2_prs_vid_disable_filtering(struct mvpp2_port *port)
{
        unsigned int tid = MVPP2_PRS_VID_PORT_DFLT(port->id);
        struct mvpp2 *priv = port->priv;

        /* Invalidate the guard entry */
        mvpp2_prs_hw_inv(priv, tid);

        priv->prs_shadow[tid].valid = false;
}

/* Add guard entry that drops packets when no VID is matched on this port */
void mvpp2_prs_vid_enable_filtering(struct mvpp2_port *port)
{
        unsigned int tid = MVPP2_PRS_VID_PORT_DFLT(port->id);
        struct mvpp2 *priv = port->priv;
        unsigned int reg_val, shift;
        struct mvpp2_prs_entry pe;

        if (priv->prs_shadow[tid].valid)
                return;

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

        pe.index = tid;

        reg_val = mvpp2_read(priv, MVPP2_MH_REG(port->id));
        if (reg_val & MVPP2_DSA_EXTENDED)
                shift = MVPP2_VLAN_TAG_EDSA_LEN;
        else
                shift = MVPP2_VLAN_TAG_LEN;

        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_VID);

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

        /* Update port mask */
        mvpp2_prs_tcam_port_set(&pe, port->id, true);

        /* Continue - set next lookup */
        mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_L2);

        /* Skip VLAN header - Set offset to 4 or 8 bytes */
        mvpp2_prs_sram_shift_set(&pe, shift, MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);

        /* Drop VLAN packets that don't belong to any VIDs on this port */
        mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_DROP_MASK,
                                 MVPP2_PRS_RI_DROP_MASK);

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

        /* Update shadow table */
        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_VID);
        mvpp2_prs_hw_write(priv, &pe);
}

/* Parser default initialization */
int mvpp2_prs_default_init(struct platform_device *pdev, struct mvpp2 *priv)
{
        int err, index, i;

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

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

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

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

        priv->prs_shadow = devm_kcalloc(&pdev->dev, MVPP2_PRS_TCAM_SRAM_SIZE,
                                        sizeof(*priv->prs_shadow),
                                        GFP_KERNEL);
        if (!priv->prs_shadow)
                return -ENOMEM;

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

        mvpp2_prs_def_flow_init(priv);

        mvpp2_prs_mh_init(priv);

        mvpp2_prs_mac_init(priv);

        mvpp2_prs_dsa_init(priv);

        mvpp2_prs_vid_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 int
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;

        /* Go through the all entires with MVPP2_PRS_LU_MAC */
        for (tid = MVPP2_PE_MAC_RANGE_START;
             tid <= MVPP2_PE_MAC_RANGE_END; 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;

                mvpp2_prs_init_from_hw(priv, &pe, tid);
                entry_pmap = mvpp2_prs_tcam_port_map_get(&pe);

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

        return -ENOENT;
}

/* Update parser's mac da entry */
int mvpp2_prs_mac_da_accept(struct mvpp2_port *port, const u8 *da, bool add)
{
        unsigned char mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
        struct mvpp2 *priv = port->priv;
        unsigned int pmap, len, ri;
        struct mvpp2_prs_entry pe;
        int tid;

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

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

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

                /* Create new TCAM entry */
                /* Go through the all entries from first to last */
                tid = mvpp2_prs_tcam_first_free(priv,
                                                MVPP2_PE_MAC_RANGE_START,
                                                MVPP2_PE_MAC_RANGE_END);
                if (tid < 0)
                        return tid;

                pe.index = tid;

                /* Mask all ports */
                mvpp2_prs_tcam_port_map_set(&pe, 0);
        } else {
                mvpp2_prs_init_from_hw(priv, &pe, tid);
        }

        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_MAC);

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

        /* Invalidate the entry if no ports are left enabled */
        pmap = mvpp2_prs_tcam_port_map_get(&pe);
        if (pmap == 0) {
                if (add)
                        return -EINVAL;

                mvpp2_prs_hw_inv(priv, pe.index);
                priv->prs_shadow[pe.index].valid = false;
                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;

                if (ether_addr_equal(da, port->dev->dev_addr))
                        ri |= 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);

        return 0;
}

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, dev->dev_addr, false);
        if (err)
                return err;

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

        /* Set addr in the device */
        ether_addr_copy(dev->dev_addr, da);

        return 0;
}

void mvpp2_prs_mac_del_all(struct mvpp2_port *port)
{
        struct mvpp2 *priv = port->priv;
        struct mvpp2_prs_entry pe;
        unsigned long pmap;
        int index, tid;

        for (tid = MVPP2_PE_MAC_RANGE_START;
             tid <= MVPP2_PE_MAC_RANGE_END; 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;

                mvpp2_prs_init_from_hw(priv, &pe, tid);

                pmap = mvpp2_prs_tcam_port_map_get(&pe);

                /* We only want entries active on this port */
                if (!test_bit(port->id, &pmap))
                        continue;

                /* 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]);

                /* Special cases : Don't remove broadcast and port's own
                 * address
                 */
                if (is_broadcast_ether_addr(da) ||
                    ether_addr_equal(da, port->dev->dev_addr))
                        continue;

                /* Remove entry from TCAM */
                mvpp2_prs_mac_da_accept(port, da, false);
        }
}

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;
}

int mvpp2_prs_add_flow(struct mvpp2 *priv, int flow, u32 ri, u32 ri_mask)
{
        struct mvpp2_prs_entry pe;
        u8 *ri_byte, *ri_byte_mask;
        int tid, i;

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

        tid = mvpp2_prs_tcam_first_free(priv,
                                        MVPP2_PE_LAST_FREE_TID,
                                        MVPP2_PE_FIRST_FREE_TID);
        if (tid < 0)
                return tid;

        pe.index = tid;

        ri_byte = (u8 *)&ri;
        ri_byte_mask = (u8 *)&ri_mask;

        mvpp2_prs_sram_ai_update(&pe, flow, MVPP2_PRS_FLOW_ID_MASK);
        mvpp2_prs_sram_bits_set(&pe, MVPP2_PRS_SRAM_LU_DONE_BIT, 1);

        for (i = 0; i < 4; i++) {
                mvpp2_prs_tcam_data_byte_set(&pe, i, ri_byte[i],
                                             ri_byte_mask[i]);
        }

        mvpp2_prs_shadow_set(priv, pe.index, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_tcam_port_map_set(&pe, MVPP2_PRS_PORT_MASK);
        mvpp2_prs_hw_write(priv, &pe);

        return 0;
}

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

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

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

        /* Such entry not exist */
        if (tid < 0) {
                /* 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.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);
        } else {
                mvpp2_prs_init_from_hw(port->priv, &pe, tid);
        }

        mvpp2_prs_tcam_lu_set(&pe, MVPP2_PRS_LU_FLOWS);
        mvpp2_prs_tcam_port_map_set(&pe, (1 << port->id));
        mvpp2_prs_hw_write(port->priv, &pe);

        return 0;
}

int mvpp2_prs_hits(struct mvpp2 *priv, int index)
{
        u32 val;

        if (index > MVPP2_PRS_TCAM_SRAM_SIZE)
                return -EINVAL;

        mvpp2_write(priv, MVPP2_PRS_TCAM_HIT_IDX_REG, index);

        val = mvpp2_read(priv, MVPP2_PRS_TCAM_HIT_CNT_REG);

        val &= MVPP2_PRS_TCAM_HIT_CNT_MASK;

        return val;
}