// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch driver
 * Copyright (c) 2019 Microsemi Corporation
 */

#include <linux/iopoll.h>
#include <linux/proc_fs.h>

#include <soc/mscc/ocelot_vcap.h>
#include "ocelot_police.h"
#include "ocelot_vcap.h"

#define ENTRY_WIDTH 32

enum vcap_sel {
        VCAP_SEL_ENTRY = 0x1,
        VCAP_SEL_ACTION = 0x2,
        VCAP_SEL_COUNTER = 0x4,
        VCAP_SEL_ALL = 0x7,
};

enum vcap_cmd {
        VCAP_CMD_WRITE = 0, /* Copy from Cache to TCAM */
        VCAP_CMD_READ = 1, /* Copy from TCAM to Cache */
        VCAP_CMD_MOVE_UP = 2, /* Move <count> up */
        VCAP_CMD_MOVE_DOWN = 3, /* Move <count> down */
        VCAP_CMD_INITIALIZE = 4, /* Write all (from cache) */
};

#define VCAP_ENTRY_WIDTH 12 /* Max entry width (32bit words) */
#define VCAP_COUNTER_WIDTH 4 /* Max counter width (32bit words) */

struct vcap_data {
        u32 entry[VCAP_ENTRY_WIDTH]; /* ENTRY_DAT */
        u32 mask[VCAP_ENTRY_WIDTH]; /* MASK_DAT */
        u32 action[VCAP_ENTRY_WIDTH]; /* ACTION_DAT */
        u32 counter[VCAP_COUNTER_WIDTH]; /* CNT_DAT */
        u32 tg; /* TG_DAT */
        u32 type; /* Action type */
        u32 tg_sw; /* Current type-group */
        u32 cnt; /* Current counter */
        u32 key_offset; /* Current entry offset */
        u32 action_offset; /* Current action offset */
        u32 counter_offset; /* Current counter offset */
        u32 tg_value; /* Current type-group value */
        u32 tg_mask; /* Current type-group mask */
};

static u32 vcap_read_update_ctrl(struct ocelot *ocelot,
                                 const struct vcap_props *vcap)
{
        return ocelot_target_read(ocelot, vcap->target, VCAP_CORE_UPDATE_CTRL);
}

static void vcap_cmd(struct ocelot *ocelot, const struct vcap_props *vcap,
                     u16 ix, int cmd, int sel)
{
        u32 value = (VCAP_CORE_UPDATE_CTRL_UPDATE_CMD(cmd) |
                     VCAP_CORE_UPDATE_CTRL_UPDATE_ADDR(ix) |
                     VCAP_CORE_UPDATE_CTRL_UPDATE_SHOT);

        if ((sel & VCAP_SEL_ENTRY) && ix >= vcap->entry_count)
                return;

        if (!(sel & VCAP_SEL_ENTRY))
                value |= VCAP_CORE_UPDATE_CTRL_UPDATE_ENTRY_DIS;

        if (!(sel & VCAP_SEL_ACTION))
                value |= VCAP_CORE_UPDATE_CTRL_UPDATE_ACTION_DIS;

        if (!(sel & VCAP_SEL_COUNTER))
                value |= VCAP_CORE_UPDATE_CTRL_UPDATE_CNT_DIS;

        ocelot_target_write(ocelot, vcap->target, value, VCAP_CORE_UPDATE_CTRL);

        read_poll_timeout(vcap_read_update_ctrl, value,
                          (value & VCAP_CORE_UPDATE_CTRL_UPDATE_SHOT) == 0,
                          10, 100000, false, ocelot, vcap);
}

/* Convert from 0-based row to VCAP entry row and run command */
static void vcap_row_cmd(struct ocelot *ocelot, const struct vcap_props *vcap,
                         u32 row, int cmd, int sel)
{
        vcap_cmd(ocelot, vcap, vcap->entry_count - row - 1, cmd, sel);
}

static void vcap_entry2cache(struct ocelot *ocelot,
                             const struct vcap_props *vcap,
                             struct vcap_data *data)
{
        u32 entry_words, i;

        entry_words = DIV_ROUND_UP(vcap->entry_width, ENTRY_WIDTH);

        for (i = 0; i < entry_words; i++) {
                ocelot_target_write_rix(ocelot, vcap->target, data->entry[i],
                                        VCAP_CACHE_ENTRY_DAT, i);
                ocelot_target_write_rix(ocelot, vcap->target, ~data->mask[i],
                                        VCAP_CACHE_MASK_DAT, i);
        }
        ocelot_target_write(ocelot, vcap->target, data->tg, VCAP_CACHE_TG_DAT);
}

static void vcap_cache2entry(struct ocelot *ocelot,
                             const struct vcap_props *vcap,
                             struct vcap_data *data)
{
        u32 entry_words, i;

        entry_words = DIV_ROUND_UP(vcap->entry_width, ENTRY_WIDTH);

        for (i = 0; i < entry_words; i++) {
                data->entry[i] = ocelot_target_read_rix(ocelot, vcap->target,
                                                        VCAP_CACHE_ENTRY_DAT, i);
                // Invert mask
                data->mask[i] = ~ocelot_target_read_rix(ocelot, vcap->target,
                                                        VCAP_CACHE_MASK_DAT, i);
        }
        data->tg = ocelot_target_read(ocelot, vcap->target, VCAP_CACHE_TG_DAT);
}

static void vcap_action2cache(struct ocelot *ocelot,
                              const struct vcap_props *vcap,
                              struct vcap_data *data)
{
        u32 action_words, mask;
        int i, width;

        /* Encode action type */
        width = vcap->action_type_width;
        if (width) {
                mask = GENMASK(width, 0);
                data->action[0] = ((data->action[0] & ~mask) | data->type);
        }

        action_words = DIV_ROUND_UP(vcap->action_width, ENTRY_WIDTH);

        for (i = 0; i < action_words; i++)
                ocelot_target_write_rix(ocelot, vcap->target, data->action[i],
                                        VCAP_CACHE_ACTION_DAT, i);

        for (i = 0; i < vcap->counter_words; i++)
                ocelot_target_write_rix(ocelot, vcap->target, data->counter[i],
                                        VCAP_CACHE_CNT_DAT, i);
}

static void vcap_cache2action(struct ocelot *ocelot,
                              const struct vcap_props *vcap,
                              struct vcap_data *data)
{
        u32 action_words;
        int i, width;

        action_words = DIV_ROUND_UP(vcap->action_width, ENTRY_WIDTH);

        for (i = 0; i < action_words; i++)
                data->action[i] = ocelot_target_read_rix(ocelot, vcap->target,
                                                         VCAP_CACHE_ACTION_DAT,
                                                         i);

        for (i = 0; i < vcap->counter_words; i++)
                data->counter[i] = ocelot_target_read_rix(ocelot, vcap->target,
                                                          VCAP_CACHE_CNT_DAT,
                                                          i);

        /* Extract action type */
        width = vcap->action_type_width;
        data->type = (width ? (data->action[0] & GENMASK(width, 0)) : 0);
}

/* Calculate offsets for entry */
static void vcap_data_offset_get(const struct vcap_props *vcap,
                                 struct vcap_data *data, int ix)
{
        int num_subwords_per_entry, num_subwords_per_action;
        int i, col, offset, num_entries_per_row, base;
        u32 width = vcap->tg_width;

        switch (data->tg_sw) {
        case VCAP_TG_FULL:
                num_entries_per_row = 1;
                break;
        case VCAP_TG_HALF:
                num_entries_per_row = 2;
                break;
        case VCAP_TG_QUARTER:
                num_entries_per_row = 4;
                break;
        default:
                return;
        }

        col = (ix % num_entries_per_row);
        num_subwords_per_entry = (vcap->sw_count / num_entries_per_row);
        base = (vcap->sw_count - col * num_subwords_per_entry -
                num_subwords_per_entry);
        data->tg_value = 0;
        data->tg_mask = 0;
        for (i = 0; i < num_subwords_per_entry; i++) {
                offset = ((base + i) * width);
                data->tg_value |= (data->tg_sw << offset);
                data->tg_mask |= GENMASK(offset + width - 1, offset);
        }

        /* Calculate key/action/counter offsets */
        col = (num_entries_per_row - col - 1);
        data->key_offset = (base * vcap->entry_width) / vcap->sw_count;
        data->counter_offset = (num_subwords_per_entry * col *
                                vcap->counter_width);
        i = data->type;
        width = vcap->action_table[i].width;
        num_subwords_per_action = vcap->action_table[i].count;
        data->action_offset = ((num_subwords_per_action * col * width) /
                                num_entries_per_row);
        data->action_offset += vcap->action_type_width;
}

static void vcap_data_set(u32 *data, u32 offset, u32 len, u32 value)
{
        u32 i, v, m;

        for (i = 0; i < len; i++, offset++) {
                v = data[offset / ENTRY_WIDTH];
                m = (1 << (offset % ENTRY_WIDTH));
                if (value & (1 << i))
                        v |= m;
                else
                        v &= ~m;
                data[offset / ENTRY_WIDTH] = v;
        }
}

static u32 vcap_data_get(u32 *data, u32 offset, u32 len)
{
        u32 i, v, m, value = 0;

        for (i = 0; i < len; i++, offset++) {
                v = data[offset / ENTRY_WIDTH];
                m = (1 << (offset % ENTRY_WIDTH));
                if (v & m)
                        value |= (1 << i);
        }
        return value;
}

static void vcap_key_field_set(struct vcap_data *data, u32 offset, u32 width,
                               u32 value, u32 mask)
{
        vcap_data_set(data->entry, offset + data->key_offset, width, value);
        vcap_data_set(data->mask, offset + data->key_offset, width, mask);
}

static void vcap_key_set(const struct vcap_props *vcap, struct vcap_data *data,
                         int field, u32 value, u32 mask)
{
        u32 offset = vcap->keys[field].offset;
        u32 length = vcap->keys[field].length;

        vcap_key_field_set(data, offset, length, value, mask);
}

static void vcap_key_bytes_set(const struct vcap_props *vcap,
                               struct vcap_data *data, int field,
                               u8 *val, u8 *msk)
{
        u32 offset = vcap->keys[field].offset;
        u32 count  = vcap->keys[field].length;
        u32 i, j, n = 0, value = 0, mask = 0;

        WARN_ON(count % 8);

        /* Data wider than 32 bits are split up in chunks of maximum 32 bits.
         * The 32 LSB of the data are written to the 32 MSB of the TCAM.
         */
        offset += count;
        count /= 8;

        for (i = 0; i < count; i++) {
                j = (count - i - 1);
                value += (val[j] << n);
                mask += (msk[j] << n);
                n += 8;
                if (n == ENTRY_WIDTH || (i + 1) == count) {
                        offset -= n;
                        vcap_key_field_set(data, offset, n, value, mask);
                        n = 0;
                        value = 0;
                        mask = 0;
                }
        }
}

static void vcap_key_l4_port_set(const struct vcap_props *vcap,
                                 struct vcap_data *data, int field,
                                 struct ocelot_vcap_udp_tcp *port)
{
        u32 offset = vcap->keys[field].offset;
        u32 length = vcap->keys[field].length;

        WARN_ON(length != 16);

        vcap_key_field_set(data, offset, length, port->value, port->mask);
}

static void vcap_key_bit_set(const struct vcap_props *vcap,
                             struct vcap_data *data, int field,
                             enum ocelot_vcap_bit val)
{
        u32 value = (val == OCELOT_VCAP_BIT_1 ? 1 : 0);
        u32 msk = (val == OCELOT_VCAP_BIT_ANY ? 0 : 1);
        u32 offset = vcap->keys[field].offset;
        u32 length = vcap->keys[field].length;

        WARN_ON(length != 1);

        vcap_key_field_set(data, offset, length, value, msk);
}

static void vcap_action_set(const struct vcap_props *vcap,
                            struct vcap_data *data, int field, u32 value)
{
        int offset = vcap->actions[field].offset;
        int length = vcap->actions[field].length;

        vcap_data_set(data->action, offset + data->action_offset, length,
                      value);
}

static void is2_action_set(struct ocelot *ocelot, struct vcap_data *data,
                           struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2];
        struct ocelot_vcap_action *a = &filter->action;

        vcap_action_set(vcap, data, VCAP_IS2_ACT_MASK_MODE, a->mask_mode);
        vcap_action_set(vcap, data, VCAP_IS2_ACT_PORT_MASK, a->port_mask);
        vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_ENA, a->police_ena);
        vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_IDX, a->pol_ix);
        vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_QU_NUM, a->cpu_qu_num);
        vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_COPY_ENA, a->cpu_copy_ena);
}

static void is2_entry_set(struct ocelot *ocelot, int ix,
                          struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2];
        struct ocelot_vcap_key_vlan *tag = &filter->vlan;
        u32 val, msk, type, type_mask = 0xf, i, count;
        struct ocelot_vcap_u64 payload;
        struct vcap_data data;
        int row = (ix / 2);

        memset(&payload, 0, sizeof(payload));
        memset(&data, 0, sizeof(data));

        /* Read row */
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
        vcap_cache2entry(ocelot, vcap, &data);
        vcap_cache2action(ocelot, vcap, &data);

        data.tg_sw = VCAP_TG_HALF;
        vcap_data_offset_get(vcap, &data, ix);
        data.tg = (data.tg & ~data.tg_mask);
        if (filter->prio != 0)
                data.tg |= data.tg_value;

        data.type = IS2_ACTION_TYPE_NORMAL;

        vcap_key_set(vcap, &data, VCAP_IS2_HK_PAG, filter->pag, 0xff);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_FIRST,
                         (filter->lookup == 0) ? OCELOT_VCAP_BIT_1 :
                         OCELOT_VCAP_BIT_0);
        vcap_key_set(vcap, &data, VCAP_IS2_HK_IGR_PORT_MASK, 0,
                     ~filter->ingress_port_mask);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_FIRST, OCELOT_VCAP_BIT_ANY);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_HOST_MATCH,
                         OCELOT_VCAP_BIT_ANY);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_MC, filter->dmac_mc);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_BC, filter->dmac_bc);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_VLAN_TAGGED, tag->tagged);
        vcap_key_set(vcap, &data, VCAP_IS2_HK_VID,
                     tag->vid.value, tag->vid.mask);
        vcap_key_set(vcap, &data, VCAP_IS2_HK_PCP,
                     tag->pcp.value[0], tag->pcp.mask[0]);
        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DEI, tag->dei);

        switch (filter->key_type) {
        case OCELOT_VCAP_KEY_ETYPE: {
                struct ocelot_vcap_key_etype *etype = &filter->key.etype;

                type = IS2_TYPE_ETYPE;
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
                                   etype->dmac.value, etype->dmac.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
                                   etype->smac.value, etype->smac.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_ETYPE,
                                   etype->etype.value, etype->etype.mask);
                /* Clear unused bits */
                vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0,
                             0, 0);
                vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD1,
                             0, 0);
                vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD2,
                             0, 0);
                vcap_key_bytes_set(vcap, &data,
                                   VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0,
                                   etype->data.value, etype->data.mask);
                break;
        }
        case OCELOT_VCAP_KEY_LLC: {
                struct ocelot_vcap_key_llc *llc = &filter->key.llc;

                type = IS2_TYPE_LLC;
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
                                   llc->dmac.value, llc->dmac.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
                                   llc->smac.value, llc->smac.mask);
                for (i = 0; i < 4; i++) {
                        payload.value[i] = llc->llc.value[i];
                        payload.mask[i] = llc->llc.mask[i];
                }
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_LLC_L2_LLC,
                                   payload.value, payload.mask);
                break;
        }
        case OCELOT_VCAP_KEY_SNAP: {
                struct ocelot_vcap_key_snap *snap = &filter->key.snap;

                type = IS2_TYPE_SNAP;
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
                                   snap->dmac.value, snap->dmac.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
                                   snap->smac.value, snap->smac.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_SNAP_L2_SNAP,
                                   filter->key.snap.snap.value,
                                   filter->key.snap.snap.mask);
                break;
        }
        case OCELOT_VCAP_KEY_ARP: {
                struct ocelot_vcap_key_arp *arp = &filter->key.arp;

                type = IS2_TYPE_ARP;
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_SMAC,
                                   arp->smac.value, arp->smac.mask);
                vcap_key_bit_set(vcap, &data,
                                 VCAP_IS2_HK_MAC_ARP_ADDR_SPACE_OK,
                                 arp->ethernet);
                vcap_key_bit_set(vcap, &data,
                                 VCAP_IS2_HK_MAC_ARP_PROTO_SPACE_OK,
                                 arp->ip);
                vcap_key_bit_set(vcap, &data,
                                 VCAP_IS2_HK_MAC_ARP_LEN_OK,
                                 arp->length);
                vcap_key_bit_set(vcap, &data,
                                 VCAP_IS2_HK_MAC_ARP_TARGET_MATCH,
                                 arp->dmac_match);
                vcap_key_bit_set(vcap, &data,
                                 VCAP_IS2_HK_MAC_ARP_SENDER_MATCH,
                                 arp->smac_match);
                vcap_key_bit_set(vcap, &data,
                                 VCAP_IS2_HK_MAC_ARP_OPCODE_UNKNOWN,
                                 arp->unknown);

                /* OPCODE is inverse, bit 0 is reply flag, bit 1 is RARP flag */
                val = ((arp->req == OCELOT_VCAP_BIT_0 ? 1 : 0) |
                       (arp->arp == OCELOT_VCAP_BIT_0 ? 2 : 0));
                msk = ((arp->req == OCELOT_VCAP_BIT_ANY ? 0 : 1) |
                       (arp->arp == OCELOT_VCAP_BIT_ANY ? 0 : 2));
                vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_OPCODE,
                             val, msk);
                vcap_key_bytes_set(vcap, &data,
                                   VCAP_IS2_HK_MAC_ARP_L3_IP4_DIP,
                                   arp->dip.value.addr, arp->dip.mask.addr);
                vcap_key_bytes_set(vcap, &data,
                                   VCAP_IS2_HK_MAC_ARP_L3_IP4_SIP,
                                   arp->sip.value.addr, arp->sip.mask.addr);
                vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_DIP_EQ_SIP,
                             0, 0);
                break;
        }
        case OCELOT_VCAP_KEY_IPV4:
        case OCELOT_VCAP_KEY_IPV6: {
                enum ocelot_vcap_bit sip_eq_dip, sport_eq_dport, seq_zero, tcp;
                enum ocelot_vcap_bit ttl, fragment, options, tcp_ack, tcp_urg;
                enum ocelot_vcap_bit tcp_fin, tcp_syn, tcp_rst, tcp_psh;
                struct ocelot_vcap_key_ipv4 *ipv4 = NULL;
                struct ocelot_vcap_key_ipv6 *ipv6 = NULL;
                struct ocelot_vcap_udp_tcp *sport, *dport;
                struct ocelot_vcap_ipv4 sip, dip;
                struct ocelot_vcap_u8 proto, ds;
                struct ocelot_vcap_u48 *ip_data;

                if (filter->key_type == OCELOT_VCAP_KEY_IPV4) {
                        ipv4 = &filter->key.ipv4;
                        ttl = ipv4->ttl;
                        fragment = ipv4->fragment;
                        options = ipv4->options;
                        proto = ipv4->proto;
                        ds = ipv4->ds;
                        ip_data = &ipv4->data;
                        sip = ipv4->sip;
                        dip = ipv4->dip;
                        sport = &ipv4->sport;
                        dport = &ipv4->dport;
                        tcp_fin = ipv4->tcp_fin;
                        tcp_syn = ipv4->tcp_syn;
                        tcp_rst = ipv4->tcp_rst;
                        tcp_psh = ipv4->tcp_psh;
                        tcp_ack = ipv4->tcp_ack;
                        tcp_urg = ipv4->tcp_urg;
                        sip_eq_dip = ipv4->sip_eq_dip;
                        sport_eq_dport = ipv4->sport_eq_dport;
                        seq_zero = ipv4->seq_zero;
                } else {
                        ipv6 = &filter->key.ipv6;
                        ttl = ipv6->ttl;
                        fragment = OCELOT_VCAP_BIT_ANY;
                        options = OCELOT_VCAP_BIT_ANY;
                        proto = ipv6->proto;
                        ds = ipv6->ds;
                        ip_data = &ipv6->data;
                        for (i = 0; i < 8; i++) {
                                val = ipv6->sip.value[i + 8];
                                msk = ipv6->sip.mask[i + 8];
                                if (i < 4) {
                                        dip.value.addr[i] = val;
                                        dip.mask.addr[i] = msk;
                                } else {
                                        sip.value.addr[i - 4] = val;
                                        sip.mask.addr[i - 4] = msk;
                                }
                        }
                        sport = &ipv6->sport;
                        dport = &ipv6->dport;
                        tcp_fin = ipv6->tcp_fin;
                        tcp_syn = ipv6->tcp_syn;
                        tcp_rst = ipv6->tcp_rst;
                        tcp_psh = ipv6->tcp_psh;
                        tcp_ack = ipv6->tcp_ack;
                        tcp_urg = ipv6->tcp_urg;
                        sip_eq_dip = ipv6->sip_eq_dip;
                        sport_eq_dport = ipv6->sport_eq_dport;
                        seq_zero = ipv6->seq_zero;
                }

                vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4,
                                 ipv4 ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
                vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_FRAGMENT,
                                 fragment);
                vcap_key_set(vcap, &data, VCAP_IS2_HK_L3_FRAG_OFS_GT0, 0, 0);
                vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_OPTIONS,
                                 options);
                vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4_L3_TTL_GT0,
                                 ttl);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_TOS,
                                   ds.value, ds.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_DIP,
                                   dip.value.addr, dip.mask.addr);
                vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_SIP,
                                   sip.value.addr, sip.mask.addr);
                vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DIP_EQ_SIP,
                                 sip_eq_dip);
                val = proto.value[0];
                msk = proto.mask[0];
                type = IS2_TYPE_IP_UDP_TCP;
                if (msk == 0xff && (val == 6 || val == 17)) {
                        /* UDP/TCP protocol match */
                        tcp = (val == 6 ?
                               OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_TCP, tcp);
                        vcap_key_l4_port_set(vcap, &data,
                                             VCAP_IS2_HK_L4_DPORT, dport);
                        vcap_key_l4_port_set(vcap, &data,
                                             VCAP_IS2_HK_L4_SPORT, sport);
                        vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_RNG, 0, 0);
                        vcap_key_bit_set(vcap, &data,
                                         VCAP_IS2_HK_L4_SPORT_EQ_DPORT,
                                         sport_eq_dport);
                        vcap_key_bit_set(vcap, &data,
                                         VCAP_IS2_HK_L4_SEQUENCE_EQ0,
                                         seq_zero);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_FIN,
                                         tcp_fin);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_SYN,
                                         tcp_syn);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_RST,
                                         tcp_rst);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_PSH,
                                         tcp_psh);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_ACK,
                                         tcp_ack);
                        vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_URG,
                                         tcp_urg);
                        vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_DOM,
                                     0, 0);
                        vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_VER,
                                     0, 0);
                } else {
                        if (msk == 0) {
                                /* Any IP protocol match */
                                type_mask = IS2_TYPE_MASK_IP_ANY;
                        } else {
                                /* Non-UDP/TCP protocol match */
                                type = IS2_TYPE_IP_OTHER;
                                for (i = 0; i < 6; i++) {
                                        payload.value[i] = ip_data->value[i];
                                        payload.mask[i] = ip_data->mask[i];
                                }
                        }
                        vcap_key_bytes_set(vcap, &data,
                                           VCAP_IS2_HK_IP4_L3_PROTO,
                                           proto.value, proto.mask);
                        vcap_key_bytes_set(vcap, &data,
                                           VCAP_IS2_HK_L3_PAYLOAD,
                                           payload.value, payload.mask);
                }
                break;
        }
        case OCELOT_VCAP_KEY_ANY:
        default:
                type = 0;
                type_mask = 0;
                count = vcap->entry_width / 2;
                /* Iterate over the non-common part of the key and
                 * clear entry data
                 */
                for (i = vcap->keys[VCAP_IS2_HK_L2_DMAC].offset;
                     i < count; i += ENTRY_WIDTH) {
                        vcap_key_field_set(&data, i, min(32u, count - i), 0, 0);
                }
                break;
        }

        vcap_key_set(vcap, &data, VCAP_IS2_TYPE, type, type_mask);
        is2_action_set(ocelot, &data, filter);
        vcap_data_set(data.counter, data.counter_offset,
                      vcap->counter_width, filter->stats.pkts);

        /* Write row */
        vcap_entry2cache(ocelot, vcap, &data);
        vcap_action2cache(ocelot, vcap, &data);
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
}

static void is1_action_set(struct ocelot *ocelot, struct vcap_data *data,
                           const struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1];
        const struct ocelot_vcap_action *a = &filter->action;

        vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_REPLACE_ENA,
                        a->vid_replace_ena);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_ADD_VAL, a->vid);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT_ENA,
                        a->vlan_pop_cnt_ena);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT,
                        a->vlan_pop_cnt);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_DEI_ENA, a->pcp_dei_ena);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_VAL, a->pcp);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_DEI_VAL, a->dei);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_ENA, a->qos_ena);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_VAL, a->qos_val);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_OVERRIDE_MASK,
                        a->pag_override_mask);
        vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_VAL, a->pag_val);
}

static void is1_entry_set(struct ocelot *ocelot, int ix,
                          struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1];
        struct ocelot_vcap_key_vlan *tag = &filter->vlan;
        struct ocelot_vcap_u64 payload;
        struct vcap_data data;
        int row = ix / 2;
        u32 type;

        memset(&payload, 0, sizeof(payload));
        memset(&data, 0, sizeof(data));

        /* Read row */
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
        vcap_cache2entry(ocelot, vcap, &data);
        vcap_cache2action(ocelot, vcap, &data);

        data.tg_sw = VCAP_TG_HALF;
        data.type = IS1_ACTION_TYPE_NORMAL;
        vcap_data_offset_get(vcap, &data, ix);
        data.tg = (data.tg & ~data.tg_mask);
        if (filter->prio != 0)
                data.tg |= data.tg_value;

        vcap_key_set(vcap, &data, VCAP_IS1_HK_LOOKUP, filter->lookup, 0x3);
        vcap_key_set(vcap, &data, VCAP_IS1_HK_IGR_PORT_MASK, 0,
                     ~filter->ingress_port_mask);
        vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_L2_MC, filter->dmac_mc);
        vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_L2_BC, filter->dmac_bc);
        vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_VLAN_TAGGED, tag->tagged);
        vcap_key_set(vcap, &data, VCAP_IS1_HK_VID,
                     tag->vid.value, tag->vid.mask);
        vcap_key_set(vcap, &data, VCAP_IS1_HK_PCP,
                     tag->pcp.value[0], tag->pcp.mask[0]);
        type = IS1_TYPE_S1_NORMAL;

        switch (filter->key_type) {
        case OCELOT_VCAP_KEY_ETYPE: {
                struct ocelot_vcap_key_etype *etype = &filter->key.etype;

                vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_L2_SMAC,
                                   etype->smac.value, etype->smac.mask);
                vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_ETYPE,
                                   etype->etype.value, etype->etype.mask);
                break;
        }
        case OCELOT_VCAP_KEY_IPV4: {
                struct ocelot_vcap_key_ipv4 *ipv4 = &filter->key.ipv4;
                struct ocelot_vcap_udp_tcp *sport = &ipv4->sport;
                struct ocelot_vcap_udp_tcp *dport = &ipv4->dport;
                enum ocelot_vcap_bit tcp_udp = OCELOT_VCAP_BIT_0;
                struct ocelot_vcap_u8 proto = ipv4->proto;
                struct ocelot_vcap_ipv4 sip = ipv4->sip;
                u32 val, msk;

                vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_IP_SNAP,
                                 OCELOT_VCAP_BIT_1);
                vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_IP4,
                                 OCELOT_VCAP_BIT_1);
                vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_ETYPE_LEN,
                                 OCELOT_VCAP_BIT_1);
                vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_L3_IP4_SIP,
                                   sip.value.addr, sip.mask.addr);

                val = proto.value[0];
                msk = proto.mask[0];

                if ((val == NEXTHDR_TCP || val == NEXTHDR_UDP) && msk == 0xff)
                        tcp_udp = OCELOT_VCAP_BIT_1;
                vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TCP_UDP, tcp_udp);

                if (tcp_udp) {
                        enum ocelot_vcap_bit tcp = OCELOT_VCAP_BIT_0;

                        if (val == NEXTHDR_TCP)
                                tcp = OCELOT_VCAP_BIT_1;

                        vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TCP, tcp);
                        vcap_key_l4_port_set(vcap, &data, VCAP_IS1_HK_L4_SPORT,
                                             sport);
                        /* Overloaded field */
                        vcap_key_l4_port_set(vcap, &data, VCAP_IS1_HK_ETYPE,
                                             dport);
                } else {
                        /* IPv4 "other" frame */
                        struct ocelot_vcap_u16 etype = {0};

                        /* Overloaded field */
                        etype.value[0] = proto.value[0];
                        etype.mask[0] = proto.mask[0];

                        vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_ETYPE,
                                           etype.value, etype.mask);
                }
                break;
        }
        default:
                break;
        }
        vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TYPE,
                         type ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);

        is1_action_set(ocelot, &data, filter);
        vcap_data_set(data.counter, data.counter_offset,
                      vcap->counter_width, filter->stats.pkts);

        /* Write row */
        vcap_entry2cache(ocelot, vcap, &data);
        vcap_action2cache(ocelot, vcap, &data);
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
}

static void es0_action_set(struct ocelot *ocelot, struct vcap_data *data,
                           const struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
        const struct ocelot_vcap_action *a = &filter->action;

        vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_OUTER_TAG,
                        a->push_outer_tag);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_INNER_TAG,
                        a->push_inner_tag);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_TPID_SEL,
                        a->tag_a_tpid_sel);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_VID_SEL,
                        a->tag_a_vid_sel);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_PCP_SEL,
                        a->tag_a_pcp_sel);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_A_VAL, a->vid_a_val);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_A_VAL, a->pcp_a_val);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_TPID_SEL,
                        a->tag_b_tpid_sel);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_VID_SEL,
                        a->tag_b_vid_sel);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_PCP_SEL,
                        a->tag_b_pcp_sel);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_B_VAL, a->vid_b_val);
        vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_B_VAL, a->pcp_b_val);
}

static void es0_entry_set(struct ocelot *ocelot, int ix,
                          struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
        struct ocelot_vcap_key_vlan *tag = &filter->vlan;
        struct ocelot_vcap_u64 payload;
        struct vcap_data data;
        int row = ix;

        memset(&payload, 0, sizeof(payload));
        memset(&data, 0, sizeof(data));

        /* Read row */
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
        vcap_cache2entry(ocelot, vcap, &data);
        vcap_cache2action(ocelot, vcap, &data);

        data.tg_sw = VCAP_TG_FULL;
        data.type = ES0_ACTION_TYPE_NORMAL;
        vcap_data_offset_get(vcap, &data, ix);
        data.tg = (data.tg & ~data.tg_mask);
        if (filter->prio != 0)
                data.tg |= data.tg_value;

        vcap_key_set(vcap, &data, VCAP_ES0_IGR_PORT, filter->ingress_port.value,
                     filter->ingress_port.mask);
        vcap_key_set(vcap, &data, VCAP_ES0_EGR_PORT, filter->egress_port.value,
                     filter->egress_port.mask);
        vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_MC, filter->dmac_mc);
        vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_BC, filter->dmac_bc);
        vcap_key_set(vcap, &data, VCAP_ES0_VID,
                     tag->vid.value, tag->vid.mask);
        vcap_key_set(vcap, &data, VCAP_ES0_PCP,
                     tag->pcp.value[0], tag->pcp.mask[0]);

        es0_action_set(ocelot, &data, filter);
        vcap_data_set(data.counter, data.counter_offset,
                      vcap->counter_width, filter->stats.pkts);

        /* Write row */
        vcap_entry2cache(ocelot, vcap, &data);
        vcap_action2cache(ocelot, vcap, &data);
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
}

static void vcap_entry_get(struct ocelot *ocelot, int ix,
                           struct ocelot_vcap_filter *filter)
{
        const struct vcap_props *vcap = &ocelot->vcap[filter->block_id];
        struct vcap_data data;
        int row, count;
        u32 cnt;

        if (filter->block_id == VCAP_ES0)
                data.tg_sw = VCAP_TG_FULL;
        else
                data.tg_sw = VCAP_TG_HALF;

        count = (1 << (data.tg_sw - 1));
        row = (ix / count);
        vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_COUNTER);
        vcap_cache2action(ocelot, vcap, &data);
        vcap_data_offset_get(vcap, &data, ix);
        cnt = vcap_data_get(data.counter, data.counter_offset,
                            vcap->counter_width);

        filter->stats.pkts = cnt;
}

static void vcap_entry_set(struct ocelot *ocelot, int ix,
                           struct ocelot_vcap_filter *filter)
{
        if (filter->block_id == VCAP_IS1)
                return is1_entry_set(ocelot, ix, filter);
        if (filter->block_id == VCAP_IS2)
                return is2_entry_set(ocelot, ix, filter);
        if (filter->block_id == VCAP_ES0)
                return es0_entry_set(ocelot, ix, filter);
}

static int ocelot_vcap_policer_add(struct ocelot *ocelot, u32 pol_ix,
                                   struct ocelot_policer *pol)
{
        struct qos_policer_conf pp = { 0 };

        if (!pol)
                return -EINVAL;

        pp.mode = MSCC_QOS_RATE_MODE_DATA;
        pp.pir = pol->rate;
        pp.pbs = pol->burst;

        return qos_policer_conf_set(ocelot, 0, pol_ix, &pp);
}

static void ocelot_vcap_policer_del(struct ocelot *ocelot,
                                    struct ocelot_vcap_block *block,
                                    u32 pol_ix)
{
        struct ocelot_vcap_filter *filter;
        struct qos_policer_conf pp = {0};
        int index = -1;

        if (pol_ix < block->pol_lpr)
                return;

        list_for_each_entry(filter, &block->rules, list) {
                index++;
                if (filter->block_id == VCAP_IS2 &&
                    filter->action.police_ena &&
                    filter->action.pol_ix < pol_ix) {
                        filter->action.pol_ix += 1;
                        ocelot_vcap_policer_add(ocelot, filter->action.pol_ix,
                                                &filter->action.pol);
                        is2_entry_set(ocelot, index, filter);
                }
        }

        pp.mode = MSCC_QOS_RATE_MODE_DISABLED;
        qos_policer_conf_set(ocelot, 0, pol_ix, &pp);

        block->pol_lpr++;
}

static void ocelot_vcap_filter_add_to_block(struct ocelot *ocelot,
                                            struct ocelot_vcap_block *block,
                                            struct ocelot_vcap_filter *filter)
{
        struct ocelot_vcap_filter *tmp;
        struct list_head *pos, *n;

        if (filter->block_id == VCAP_IS2 && filter->action.police_ena) {
                block->pol_lpr--;
                filter->action.pol_ix = block->pol_lpr;
                ocelot_vcap_policer_add(ocelot, filter->action.pol_ix,
                                        &filter->action.pol);
        }

        block->count++;

        if (list_empty(&block->rules)) {
                list_add(&filter->list, &block->rules);
                return;
        }

        list_for_each_safe(pos, n, &block->rules) {
                tmp = list_entry(pos, struct ocelot_vcap_filter, list);
                if (filter->prio < tmp->prio)
                        break;
        }
        list_add(&filter->list, pos->prev);
}

static bool ocelot_vcap_filter_equal(const struct ocelot_vcap_filter *a,
                                     const struct ocelot_vcap_filter *b)
{
        return !memcmp(&a->id, &b->id, sizeof(struct ocelot_vcap_id));
}

static int ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block *block,
                                              struct ocelot_vcap_filter *filter)
{
        struct ocelot_vcap_filter *tmp;
        int index = 0;

        list_for_each_entry(tmp, &block->rules, list) {
                if (ocelot_vcap_filter_equal(filter, tmp))
                        return index;
                index++;
        }

        return -ENOENT;
}

static struct ocelot_vcap_filter*
ocelot_vcap_block_find_filter_by_index(struct ocelot_vcap_block *block,
                                       int index)
{
        struct ocelot_vcap_filter *tmp;
        int i = 0;

        list_for_each_entry(tmp, &block->rules, list) {
                if (i == index)
                        return tmp;
                ++i;
        }

        return NULL;
}

struct ocelot_vcap_filter *

ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block *block,
                                    unsigned long cookie, bool tc_offload)
{
        struct ocelot_vcap_filter *filter;

        list_for_each_entry(filter, &block->rules, list)
                if (filter->id.tc_offload == tc_offload &&
                    filter->id.cookie == cookie)
                        return filter;

        return NULL;
}
EXPORT_SYMBOL(ocelot_vcap_block_find_filter_by_id);

/* If @on=false, then SNAP, ARP, IP and OAM frames will not match on keys based
 * on destination and source MAC addresses, but only on higher-level protocol
 * information. The only frame types to match on keys containing MAC addresses
 * in this case are non-SNAP, non-ARP, non-IP and non-OAM frames.
 *
 * If @on=true, then the above frame types (SNAP, ARP, IP and OAM) will match
 * on MAC_ETYPE keys such as destination and source MAC on this ingress port.
 * However the setting has the side effect of making these frames not matching
 * on any _other_ keys than MAC_ETYPE ones.
 */
static void ocelot_match_all_as_mac_etype(struct ocelot *ocelot, int port,
                                          int lookup, bool on)
{
        u32 val = 0;

        if (on)
                val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
                      ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
                      ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
                      ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
                      ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup));

        ocelot_rmw_gix(ocelot, val,
                       ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
                       ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
                       ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
                       ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
                       ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup)),
                       ANA_PORT_VCAP_S2_CFG, port);
}

static bool
ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter *filter)
{
        u16 proto, mask;

        if (filter->key_type != OCELOT_VCAP_KEY_ETYPE)
                return false;

        proto = ntohs(*(__be16 *)filter->key.etype.etype.value);
        mask = ntohs(*(__be16 *)filter->key.etype.etype.mask);

        /* ETH_P_ALL match, so all protocols below are included */
        if (mask == 0)
                return true;
        if (proto == ETH_P_ARP)
                return true;
        if (proto == ETH_P_IP)
                return true;
        if (proto == ETH_P_IPV6)
                return true;

        return false;
}

static bool
ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter *filter)
{
        if (filter->key_type == OCELOT_VCAP_KEY_SNAP)
                return true;
        if (filter->key_type == OCELOT_VCAP_KEY_ARP)
                return true;
        if (filter->key_type == OCELOT_VCAP_KEY_IPV4)
                return true;
        if (filter->key_type == OCELOT_VCAP_KEY_IPV6)
                return true;
        return false;
}

static bool
ocelot_exclusive_mac_etype_filter_rules(struct ocelot *ocelot,
                                        struct ocelot_vcap_filter *filter)
{
        struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
        struct ocelot_vcap_filter *tmp;
        unsigned long port;
        int i;

        /* We only have the S2_IP_TCPUDP_DIS set of knobs for VCAP IS2 */
        if (filter->block_id != VCAP_IS2)
                return true;

        if (ocelot_vcap_is_problematic_mac_etype(filter)) {
                /* Search for any non-MAC_ETYPE rules on the port */
                for (i = 0; i < block->count; i++) {
                        tmp = ocelot_vcap_block_find_filter_by_index(block, i);
                        if (tmp->ingress_port_mask & filter->ingress_port_mask &&
                            tmp->lookup == filter->lookup &&
                            ocelot_vcap_is_problematic_non_mac_etype(tmp))
                                return false;
                }

                for_each_set_bit(port, &filter->ingress_port_mask,
                                 ocelot->num_phys_ports)
                        ocelot_match_all_as_mac_etype(ocelot, port,
                                                      filter->lookup, true);
        } else if (ocelot_vcap_is_problematic_non_mac_etype(filter)) {
                /* Search for any MAC_ETYPE rules on the port */
                for (i = 0; i < block->count; i++) {
                        tmp = ocelot_vcap_block_find_filter_by_index(block, i);
                        if (tmp->ingress_port_mask & filter->ingress_port_mask &&
                            tmp->lookup == filter->lookup &&
                            ocelot_vcap_is_problematic_mac_etype(tmp))
                                return false;
                }

                for_each_set_bit(port, &filter->ingress_port_mask,
                                 ocelot->num_phys_ports)
                        ocelot_match_all_as_mac_etype(ocelot, port,
                                                      filter->lookup, false);
        }

        return true;
}

int ocelot_vcap_filter_add(struct ocelot *ocelot,
                           struct ocelot_vcap_filter *filter,
                           struct netlink_ext_ack *extack)
{
        struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
        int i, index;

        if (!ocelot_exclusive_mac_etype_filter_rules(ocelot, filter)) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules, use the other IS2 lookup");
                return -EBUSY;
        }

        /* Add filter to the linked list */
        ocelot_vcap_filter_add_to_block(ocelot, block, filter);

        /* Get the index of the inserted filter */
        index = ocelot_vcap_block_get_filter_index(block, filter);
        if (index < 0)
                return index;

        /* Move down the rules to make place for the new filter */
        for (i = block->count - 1; i > index; i--) {
                struct ocelot_vcap_filter *tmp;

                tmp = ocelot_vcap_block_find_filter_by_index(block, i);
                vcap_entry_set(ocelot, i, tmp);
        }

        /* Now insert the new filter */
        vcap_entry_set(ocelot, index, filter);
        return 0;
}
EXPORT_SYMBOL(ocelot_vcap_filter_add);

static void ocelot_vcap_block_remove_filter(struct ocelot *ocelot,
                                            struct ocelot_vcap_block *block,
                                            struct ocelot_vcap_filter *filter)
{
        struct ocelot_vcap_filter *tmp;
        struct list_head *pos, *q;

        list_for_each_safe(pos, q, &block->rules) {
                tmp = list_entry(pos, struct ocelot_vcap_filter, list);
                if (ocelot_vcap_filter_equal(filter, tmp)) {
                        if (tmp->block_id == VCAP_IS2 &&
                            tmp->action.police_ena)
                                ocelot_vcap_policer_del(ocelot, block,
                                                        tmp->action.pol_ix);

                        list_del(pos);
                        kfree(tmp);
                }
        }

        block->count--;
}

int ocelot_vcap_filter_del(struct ocelot *ocelot,
                           struct ocelot_vcap_filter *filter)
{
        struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
        struct ocelot_vcap_filter del_filter;
        int i, index;

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

        /* Gets index of the filter */
        index = ocelot_vcap_block_get_filter_index(block, filter);
        if (index < 0)
                return index;

        /* Delete filter */
        ocelot_vcap_block_remove_filter(ocelot, block, filter);

        /* Move up all the blocks over the deleted filter */
        for (i = index; i < block->count; i++) {
                struct ocelot_vcap_filter *tmp;

                tmp = ocelot_vcap_block_find_filter_by_index(block, i);
                vcap_entry_set(ocelot, i, tmp);
        }

        /* Now delete the last filter, because it is duplicated */
        vcap_entry_set(ocelot, block->count, &del_filter);

        return 0;
}
EXPORT_SYMBOL(ocelot_vcap_filter_del);

int ocelot_vcap_filter_stats_update(struct ocelot *ocelot,
                                    struct ocelot_vcap_filter *filter)
{
        struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
        struct ocelot_vcap_filter tmp;
        int index;

        index = ocelot_vcap_block_get_filter_index(block, filter);
        if (index < 0)
                return index;

        vcap_entry_get(ocelot, index, filter);

        /* After we get the result we need to clear the counters */
        tmp = *filter;
        tmp.stats.pkts = 0;
        vcap_entry_set(ocelot, index, &tmp);

        return 0;
}

static void ocelot_vcap_init_one(struct ocelot *ocelot,
                                 const struct vcap_props *vcap)
{
        struct vcap_data data;

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

        vcap_entry2cache(ocelot, vcap, &data);
        ocelot_target_write(ocelot, vcap->target, vcap->entry_count,
                            VCAP_CORE_MV_CFG);
        vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE, VCAP_SEL_ENTRY);

        vcap_action2cache(ocelot, vcap, &data);
        ocelot_target_write(ocelot, vcap->target, vcap->action_count,
                            VCAP_CORE_MV_CFG);
        vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE,
                 VCAP_SEL_ACTION | VCAP_SEL_COUNTER);
}

static void ocelot_vcap_detect_constants(struct ocelot *ocelot,
                                         struct vcap_props *vcap)
{
        int counter_memory_width;
        int num_default_actions;
        int version;

        version = ocelot_target_read(ocelot, vcap->target,
                                     VCAP_CONST_VCAP_VER);
        /* Only version 0 VCAP supported for now */
        if (WARN_ON(version != 0))
                return;

        /* Width in bits of type-group field */
        vcap->tg_width = ocelot_target_read(ocelot, vcap->target,
                                            VCAP_CONST_ENTRY_TG_WIDTH);
        /* Number of subwords per TCAM row */
        vcap->sw_count = ocelot_target_read(ocelot, vcap->target,
                                            VCAP_CONST_ENTRY_SWCNT);
        /* Number of rows in TCAM. There can be this many full keys, or double
         * this number half keys, or 4 times this number quarter keys.
         */
        vcap->entry_count = ocelot_target_read(ocelot, vcap->target,
                                               VCAP_CONST_ENTRY_CNT);
        /* Assuming there are 4 subwords per TCAM row, their layout in the
         * actual TCAM (not in the cache) would be:
         *
         * |  SW 3  | TG 3 |  SW 2  | TG 2 |  SW 1  | TG 1 |  SW 0  | TG 0 |
         *
         * (where SW=subword and TG=Type-Group).
         *
         * What VCAP_CONST_ENTRY_CNT is giving us is the width of one full TCAM
         * row. But when software accesses the TCAM through the cache
         * registers, the Type-Group values are written through another set of
         * registers VCAP_TG_DAT, and therefore, it appears as though the 4
         * subwords are contiguous in the cache memory.
         * Important mention: regardless of the number of key entries per row
         * (and therefore of key size: 1 full key or 2 half keys or 4 quarter
         * keys), software always has to configure 4 Type-Group values. For
         * example, in the case of 1 full key, the driver needs to set all 4
         * Type-Group to be full key.
         *
         * For this reason, we need to fix up the value that the hardware is
         * giving us. We don't actually care about the width of the entry in
         * the TCAM. What we care about is the width of the entry in the cache
         * registers, which is how we get to interact with it. And since the
         * VCAP_ENTRY_DAT cache registers access only the subwords and not the
         * Type-Groups, this means we need to subtract the width of the
         * Type-Groups when packing and unpacking key entry data in a TCAM row.
         */
        vcap->entry_width = ocelot_target_read(ocelot, vcap->target,
                                               VCAP_CONST_ENTRY_WIDTH);
        vcap->entry_width -= vcap->tg_width * vcap->sw_count;
        num_default_actions = ocelot_target_read(ocelot, vcap->target,
                                                 VCAP_CONST_ACTION_DEF_CNT);
        vcap->action_count = vcap->entry_count + num_default_actions;
        vcap->action_width = ocelot_target_read(ocelot, vcap->target,
                                                VCAP_CONST_ACTION_WIDTH);
        /* The width of the counter memory, this is the complete width of all
         * counter-fields associated with one full-word entry. There is one
         * counter per entry sub-word (see CAP_CORE::ENTRY_SWCNT for number of
         * subwords.)
         */
        vcap->counter_words = vcap->sw_count;
        counter_memory_width = ocelot_target_read(ocelot, vcap->target,
                                                  VCAP_CONST_CNT_WIDTH);
        vcap->counter_width = counter_memory_width / vcap->counter_words;
}

int ocelot_vcap_init(struct ocelot *ocelot)
{
        int i;

        /* Create a policer that will drop the frames for the cpu.
         * This policer will be used as action in the acl rules to drop
         * frames.
         */
        ocelot_write_gix(ocelot, 0x299, ANA_POL_MODE_CFG,
                         OCELOT_POLICER_DISCARD);
        ocelot_write_gix(ocelot, 0x1, ANA_POL_PIR_CFG,
                         OCELOT_POLICER_DISCARD);
        ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_PIR_STATE,
                         OCELOT_POLICER_DISCARD);
        ocelot_write_gix(ocelot, 0x0, ANA_POL_CIR_CFG,
                         OCELOT_POLICER_DISCARD);
        ocelot_write_gix(ocelot, 0x3fffff, ANA_POL_CIR_STATE,
                         OCELOT_POLICER_DISCARD);

        for (i = 0; i < OCELOT_NUM_VCAP_BLOCKS; i++) {
                struct ocelot_vcap_block *block = &ocelot->block[i];
                struct vcap_props *vcap = &ocelot->vcap[i];

                INIT_LIST_HEAD(&block->rules);
                block->pol_lpr = OCELOT_POLICER_DISCARD - 1;

                ocelot_vcap_detect_constants(ocelot, vcap);
                ocelot_vcap_init_one(ocelot, vcap);
        }

        INIT_LIST_HEAD(&ocelot->dummy_rules);

        return 0;
}