// SPDX-License-Identifier: GPL-2.0
/*
 * DPAA2 Ethernet Switch flower support
 *
 * Copyright 2021 NXP
 *
 */

#include "dpaa2-switch.h"

static int dpaa2_switch_flower_parse_key(struct flow_cls_offload *cls,
                                         struct dpsw_acl_key *acl_key)
{
        struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
        struct flow_dissector *dissector = rule->match.dissector;
        struct netlink_ext_ack *extack = cls->common.extack;
        struct dpsw_acl_fields *acl_h, *acl_m;

        if (dissector->used_keys &
            ~(BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
              BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
              BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) |
              BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IP) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
              BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS))) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Unsupported keys used");
                return -EOPNOTSUPP;
        }

        acl_h = &acl_key->match;
        acl_m = &acl_key->mask;

        if (flow_rule_match_has_control_flags(rule, extack))
                return -EOPNOTSUPP;

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
                struct flow_match_basic match;

                flow_rule_match_basic(rule, &match);
                acl_h->l3_protocol = match.key->ip_proto;
                acl_h->l2_ether_type = be16_to_cpu(match.key->n_proto);
                acl_m->l3_protocol = match.mask->ip_proto;
                acl_m->l2_ether_type = be16_to_cpu(match.mask->n_proto);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
                struct flow_match_eth_addrs match;

                flow_rule_match_eth_addrs(rule, &match);
                ether_addr_copy(acl_h->l2_dest_mac, &match.key->dst[0]);
                ether_addr_copy(acl_h->l2_source_mac, &match.key->src[0]);
                ether_addr_copy(acl_m->l2_dest_mac, &match.mask->dst[0]);
                ether_addr_copy(acl_m->l2_source_mac, &match.mask->src[0]);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
                struct flow_match_vlan match;

                flow_rule_match_vlan(rule, &match);
                acl_h->l2_vlan_id = match.key->vlan_id;
                acl_h->l2_tpid = be16_to_cpu(match.key->vlan_tpid);
                acl_h->l2_pcp_dei = match.key->vlan_priority << 1 |
                                    match.key->vlan_dei;

                acl_m->l2_vlan_id = match.mask->vlan_id;
                acl_m->l2_tpid = be16_to_cpu(match.mask->vlan_tpid);
                acl_m->l2_pcp_dei = match.mask->vlan_priority << 1 |
                                    match.mask->vlan_dei;
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
                struct flow_match_ipv4_addrs match;

                flow_rule_match_ipv4_addrs(rule, &match);
                acl_h->l3_source_ip = be32_to_cpu(match.key->src);
                acl_h->l3_dest_ip = be32_to_cpu(match.key->dst);
                acl_m->l3_source_ip = be32_to_cpu(match.mask->src);
                acl_m->l3_dest_ip = be32_to_cpu(match.mask->dst);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
                struct flow_match_ports match;

                flow_rule_match_ports(rule, &match);
                acl_h->l4_source_port = be16_to_cpu(match.key->src);
                acl_h->l4_dest_port = be16_to_cpu(match.key->dst);
                acl_m->l4_source_port = be16_to_cpu(match.mask->src);
                acl_m->l4_dest_port = be16_to_cpu(match.mask->dst);
        }

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
                struct flow_match_ip match;

                flow_rule_match_ip(rule, &match);
                if (match.mask->ttl != 0) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Matching on TTL not supported");
                        return -EOPNOTSUPP;
                }

                if ((match.mask->tos & 0x3) != 0) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Matching on ECN not supported, only DSCP");
                        return -EOPNOTSUPP;
                }

                acl_h->l3_dscp = match.key->tos >> 2;
                acl_m->l3_dscp = match.mask->tos >> 2;
        }

        return 0;
}

int dpaa2_switch_acl_entry_add(struct dpaa2_switch_filter_block *filter_block,
                               struct dpaa2_switch_acl_entry *entry)
{
        struct dpsw_acl_entry_cfg *acl_entry_cfg = &entry->cfg;
        struct ethsw_core *ethsw = filter_block->ethsw;
        struct dpsw_acl_key *acl_key = &entry->key;
        struct device *dev = ethsw->dev;
        u8 *cmd_buff;
        int err;

        cmd_buff = kzalloc(DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE, GFP_KERNEL);
        if (!cmd_buff)
                return -ENOMEM;

        dpsw_acl_prepare_entry_cfg(acl_key, cmd_buff);

        acl_entry_cfg->key_iova = dma_map_single(dev, cmd_buff,
                                                 DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE,
                                                 DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev, acl_entry_cfg->key_iova))) {
                dev_err(dev, "DMA mapping failed\n");
                kfree(cmd_buff);
                return -EFAULT;
        }

        err = dpsw_acl_add_entry(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                 filter_block->acl_id, acl_entry_cfg);

        dma_unmap_single(dev, acl_entry_cfg->key_iova,
                         DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE,
                         DMA_TO_DEVICE);
        if (err) {
                dev_err(dev, "dpsw_acl_add_entry() failed %d\n", err);
                kfree(cmd_buff);
                return err;
        }

        kfree(cmd_buff);

        return 0;
}

static int
dpaa2_switch_acl_entry_remove(struct dpaa2_switch_filter_block *block,
                              struct dpaa2_switch_acl_entry *entry)
{
        struct dpsw_acl_entry_cfg *acl_entry_cfg = &entry->cfg;
        struct dpsw_acl_key *acl_key = &entry->key;
        struct ethsw_core *ethsw = block->ethsw;
        struct device *dev = ethsw->dev;
        u8 *cmd_buff;
        int err;

        cmd_buff = kzalloc(DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE, GFP_KERNEL);
        if (!cmd_buff)
                return -ENOMEM;

        dpsw_acl_prepare_entry_cfg(acl_key, cmd_buff);

        acl_entry_cfg->key_iova = dma_map_single(dev, cmd_buff,
                                                 DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE,
                                                 DMA_TO_DEVICE);
        if (unlikely(dma_mapping_error(dev, acl_entry_cfg->key_iova))) {
                dev_err(dev, "DMA mapping failed\n");
                kfree(cmd_buff);
                return -EFAULT;
        }

        err = dpsw_acl_remove_entry(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                    block->acl_id, acl_entry_cfg);

        dma_unmap_single(dev, acl_entry_cfg->key_iova,
                         DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE, DMA_TO_DEVICE);
        if (err) {
                dev_err(dev, "dpsw_acl_remove_entry() failed %d\n", err);
                kfree(cmd_buff);
                return err;
        }

        kfree(cmd_buff);

        return 0;
}

static int
dpaa2_switch_acl_entry_add_to_list(struct dpaa2_switch_filter_block *block,
                                   struct dpaa2_switch_acl_entry *entry)
{
        struct dpaa2_switch_acl_entry *tmp;
        struct list_head *pos, *n;
        int index = 0;

        if (list_empty(&block->acl_entries)) {
                list_add(&entry->list, &block->acl_entries);
                return index;
        }

        list_for_each_safe(pos, n, &block->acl_entries) {
                tmp = list_entry(pos, struct dpaa2_switch_acl_entry, list);
                if (entry->prio < tmp->prio)
                        break;
                index++;
        }
        list_add(&entry->list, pos->prev);
        return index;
}

static struct dpaa2_switch_acl_entry*
dpaa2_switch_acl_entry_get_by_index(struct dpaa2_switch_filter_block *block,
                                    int index)
{
        struct dpaa2_switch_acl_entry *tmp;
        int i = 0;

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

        return NULL;
}

static int
dpaa2_switch_acl_entry_set_precedence(struct dpaa2_switch_filter_block *block,
                                      struct dpaa2_switch_acl_entry *entry,
                                      int precedence)
{
        int err;

        err = dpaa2_switch_acl_entry_remove(block, entry);
        if (err)
                return err;

        entry->cfg.precedence = precedence;
        return dpaa2_switch_acl_entry_add(block, entry);
}

static int
dpaa2_switch_acl_tbl_add_entry(struct dpaa2_switch_filter_block *block,
                               struct dpaa2_switch_acl_entry *entry)
{
        struct dpaa2_switch_acl_entry *tmp;
        int index, i, precedence, err;

        /* Add the new ACL entry to the linked list and get its index */
        index = dpaa2_switch_acl_entry_add_to_list(block, entry);

        /* Move up in priority the ACL entries to make space
         * for the new filter.
         */
        precedence = DPAA2_ETHSW_PORT_MAX_ACL_ENTRIES - block->num_acl_rules - 1;
        for (i = 0; i < index; i++) {
                tmp = dpaa2_switch_acl_entry_get_by_index(block, i);

                err = dpaa2_switch_acl_entry_set_precedence(block, tmp,
                                                            precedence);
                if (err)
                        return err;

                precedence++;
        }

        /* Add the new entry to hardware */
        entry->cfg.precedence = precedence;
        err = dpaa2_switch_acl_entry_add(block, entry);
        block->num_acl_rules++;

        return err;
}

static struct dpaa2_switch_acl_entry *
dpaa2_switch_acl_tbl_find_entry_by_cookie(struct dpaa2_switch_filter_block *block,
                                          unsigned long cookie)
{
        struct dpaa2_switch_acl_entry *tmp, *n;

        list_for_each_entry_safe(tmp, n, &block->acl_entries, list) {
                if (tmp->cookie == cookie)
                        return tmp;
        }
        return NULL;
}

static int
dpaa2_switch_acl_entry_get_index(struct dpaa2_switch_filter_block *block,
                                 struct dpaa2_switch_acl_entry *entry)
{
        struct dpaa2_switch_acl_entry *tmp, *n;
        int index = 0;

        list_for_each_entry_safe(tmp, n, &block->acl_entries, list) {
                if (tmp->cookie == entry->cookie)
                        return index;
                index++;
        }
        return -ENOENT;
}

static struct dpaa2_switch_mirror_entry *
dpaa2_switch_mirror_find_entry_by_cookie(struct dpaa2_switch_filter_block *block,
                                         unsigned long cookie)
{
        struct dpaa2_switch_mirror_entry *tmp, *n;

        list_for_each_entry_safe(tmp, n, &block->mirror_entries, list) {
                if (tmp->cookie == cookie)
                        return tmp;
        }
        return NULL;
}

static int
dpaa2_switch_acl_tbl_remove_entry(struct dpaa2_switch_filter_block *block,
                                  struct dpaa2_switch_acl_entry *entry)
{
        struct dpaa2_switch_acl_entry *tmp;
        int index, i, precedence, err;

        index = dpaa2_switch_acl_entry_get_index(block, entry);

        /* Remove from hardware the ACL entry */
        err = dpaa2_switch_acl_entry_remove(block, entry);
        if (err)
                return err;

        block->num_acl_rules--;

        /* Remove it from the list also */
        list_del(&entry->list);

        /* Move down in priority the entries over the deleted one */
        precedence = entry->cfg.precedence;
        for (i = index - 1; i >= 0; i--) {
                tmp = dpaa2_switch_acl_entry_get_by_index(block, i);
                err = dpaa2_switch_acl_entry_set_precedence(block, tmp,
                                                            precedence);
                if (err)
                        return err;

                precedence--;
        }

        kfree(entry);

        return 0;
}

static int dpaa2_switch_tc_parse_action_acl(struct ethsw_core *ethsw,
                                            struct flow_action_entry *cls_act,
                                            struct dpsw_acl_result *dpsw_act,
                                            struct netlink_ext_ack *extack)
{
        int err = 0;

        switch (cls_act->id) {
        case FLOW_ACTION_TRAP:
                dpsw_act->action = DPSW_ACL_ACTION_REDIRECT_TO_CTRL_IF;
                break;
        case FLOW_ACTION_REDIRECT:
                if (!dpaa2_switch_port_dev_check(cls_act->dev)) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Destination not a DPAA2 switch port");
                        return -EOPNOTSUPP;
                }

                dpsw_act->if_id = dpaa2_switch_get_index(ethsw, cls_act->dev);
                dpsw_act->action = DPSW_ACL_ACTION_REDIRECT;
                break;
        case FLOW_ACTION_DROP:
                dpsw_act->action = DPSW_ACL_ACTION_DROP;
                break;
        default:
                NL_SET_ERR_MSG_MOD(extack,
                                   "Action not supported");
                err = -EOPNOTSUPP;
                goto out;
        }

out:
        return err;
}

static int
dpaa2_switch_block_add_mirror(struct dpaa2_switch_filter_block *block,
                              struct dpaa2_switch_mirror_entry *entry,
                              u16 to, struct netlink_ext_ack *extack)
{
        unsigned long block_ports = block->ports;
        struct ethsw_core *ethsw = block->ethsw;
        struct ethsw_port_priv *port_priv;
        unsigned long ports_added = 0;
        u16 vlan = entry->cfg.vlan_id;
        bool mirror_port_enabled;
        int err, port;

        /* Setup the mirroring port */
        mirror_port_enabled = (ethsw->mirror_port != ethsw->sw_attr.num_ifs);
        if (!mirror_port_enabled) {
                err = dpsw_set_reflection_if(ethsw->mc_io, 0,
                                             ethsw->dpsw_handle, to);
                if (err)
                        return err;
                ethsw->mirror_port = to;
        }

        /* Setup the same egress mirroring configuration on all the switch
         * ports that share the same filter block.
         */
        for_each_set_bit(port, &block_ports, ethsw->sw_attr.num_ifs) {
                port_priv = ethsw->ports[port];

                /* We cannot add a per VLAN mirroring rule if the VLAN in
                 * question is not installed on the switch port.
                 */
                if (entry->cfg.filter == DPSW_REFLECTION_FILTER_INGRESS_VLAN &&
                    !(port_priv->vlans[vlan] & ETHSW_VLAN_MEMBER)) {
                        NL_SET_ERR_MSG(extack,
                                       "VLAN must be installed on the switch port");
                        err = -EINVAL;
                        goto err_remove_filters;
                }

                err = dpsw_if_add_reflection(ethsw->mc_io, 0,
                                             ethsw->dpsw_handle,
                                             port, &entry->cfg);
                if (err)
                        goto err_remove_filters;

                ports_added |= BIT(port);
        }

        list_add(&entry->list, &block->mirror_entries);

        return 0;

err_remove_filters:
        for_each_set_bit(port, &ports_added, ethsw->sw_attr.num_ifs) {
                dpsw_if_remove_reflection(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                          port, &entry->cfg);
        }

        if (!mirror_port_enabled)
                ethsw->mirror_port = ethsw->sw_attr.num_ifs;

        return err;
}

static int
dpaa2_switch_block_remove_mirror(struct dpaa2_switch_filter_block *block,
                                 struct dpaa2_switch_mirror_entry *entry)
{
        struct dpsw_reflection_cfg *cfg = &entry->cfg;
        unsigned long block_ports = block->ports;
        struct ethsw_core *ethsw = block->ethsw;
        int port;

        /* Remove this mirroring configuration from all the ports belonging to
         * the filter block.
         */
        for_each_set_bit(port, &block_ports, ethsw->sw_attr.num_ifs)
                dpsw_if_remove_reflection(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                          port, cfg);

        /* Also remove it from the list of mirror filters */
        list_del(&entry->list);
        kfree(entry);

        /* If this was the last mirror filter, then unset the mirror port */
        if (list_empty(&block->mirror_entries))
                ethsw->mirror_port =  ethsw->sw_attr.num_ifs;

        return 0;
}

static int
dpaa2_switch_cls_flower_replace_acl(struct dpaa2_switch_filter_block *block,
                                    struct flow_cls_offload *cls)
{
        struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
        struct netlink_ext_ack *extack = cls->common.extack;
        struct dpaa2_switch_acl_entry *acl_entry;
        struct ethsw_core *ethsw = block->ethsw;
        struct flow_action_entry *act;
        int err;

        if (dpaa2_switch_acl_tbl_is_full(block)) {
                NL_SET_ERR_MSG(extack, "Maximum filter capacity reached");
                return -ENOMEM;
        }

        acl_entry = kzalloc_obj(*acl_entry);
        if (!acl_entry)
                return -ENOMEM;

        err = dpaa2_switch_flower_parse_key(cls, &acl_entry->key);
        if (err)
                goto free_acl_entry;

        act = &rule->action.entries[0];
        err = dpaa2_switch_tc_parse_action_acl(ethsw, act,
                                               &acl_entry->cfg.result, extack);
        if (err)
                goto free_acl_entry;

        acl_entry->prio = cls->common.prio;
        acl_entry->cookie = cls->cookie;

        err = dpaa2_switch_acl_tbl_add_entry(block, acl_entry);
        if (err)
                goto free_acl_entry;

        return 0;

free_acl_entry:
        kfree(acl_entry);

        return err;
}

static int dpaa2_switch_flower_parse_mirror_key(struct flow_cls_offload *cls,
                                                u16 *vlan)
{
        struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
        struct flow_dissector *dissector = rule->match.dissector;
        struct netlink_ext_ack *extack = cls->common.extack;
        int ret = -EOPNOTSUPP;

        if (dissector->used_keys &
            ~(BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
              BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
              BIT_ULL(FLOW_DISSECTOR_KEY_VLAN))) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Mirroring is supported only per VLAN");
                return -EOPNOTSUPP;
        }

        if (flow_rule_match_has_control_flags(rule, extack))
                return -EOPNOTSUPP;

        if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
                struct flow_match_vlan match;

                flow_rule_match_vlan(rule, &match);

                if (match.mask->vlan_priority != 0 ||
                    match.mask->vlan_dei != 0) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Only matching on VLAN ID supported");
                        return -EOPNOTSUPP;
                }

                if (match.mask->vlan_id != 0xFFF) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Masked matching not supported");
                        return -EOPNOTSUPP;
                }

                *vlan = (u16)match.key->vlan_id;
                ret = 0;
        }

        return ret;
}

static int
dpaa2_switch_cls_flower_replace_mirror(struct dpaa2_switch_filter_block *block,
                                       struct flow_cls_offload *cls)
{
        struct netlink_ext_ack *extack = cls->common.extack;
        struct dpaa2_switch_mirror_entry *mirror_entry;
        struct ethsw_core *ethsw = block->ethsw;
        struct dpaa2_switch_mirror_entry *tmp;
        struct flow_action_entry *cls_act;
        struct list_head *pos, *n;
        bool mirror_port_enabled;
        u16 if_id, vlan;
        int err;

        mirror_port_enabled = (ethsw->mirror_port != ethsw->sw_attr.num_ifs);
        cls_act = &cls->rule->action.entries[0];

        /* Offload rules only when the destination is a DPAA2 switch port */
        if (!dpaa2_switch_port_dev_check(cls_act->dev)) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Destination not a DPAA2 switch port");
                return -EOPNOTSUPP;
        }
        if_id = dpaa2_switch_get_index(ethsw, cls_act->dev);

        /* We have a single mirror port but can configure egress mirroring on
         * all the other switch ports. We need to allow mirroring rules only
         * when the destination port is the same.
         */
        if (mirror_port_enabled && ethsw->mirror_port != if_id) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Multiple mirror ports not supported");
                return -EBUSY;
        }

        /* Parse the key */
        err = dpaa2_switch_flower_parse_mirror_key(cls, &vlan);
        if (err)
                return err;

        /* Make sure that we don't already have a mirror rule with the same
         * configuration.
         */
        list_for_each_safe(pos, n, &block->mirror_entries) {
                tmp = list_entry(pos, struct dpaa2_switch_mirror_entry, list);

                if (tmp->cfg.filter == DPSW_REFLECTION_FILTER_INGRESS_VLAN &&
                    tmp->cfg.vlan_id == vlan) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "VLAN mirror filter already installed");
                        return -EBUSY;
                }
        }

        mirror_entry = kzalloc_obj(*mirror_entry);
        if (!mirror_entry)
                return -ENOMEM;

        mirror_entry->cfg.filter = DPSW_REFLECTION_FILTER_INGRESS_VLAN;
        mirror_entry->cfg.vlan_id = vlan;
        mirror_entry->cookie = cls->cookie;

        return dpaa2_switch_block_add_mirror(block, mirror_entry, if_id,
                                             extack);
}

int dpaa2_switch_cls_flower_replace(struct dpaa2_switch_filter_block *block,
                                    struct flow_cls_offload *cls)
{
        struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
        struct netlink_ext_ack *extack = cls->common.extack;
        struct flow_action_entry *act;

        if (!flow_offload_has_one_action(&rule->action)) {
                NL_SET_ERR_MSG(extack, "Only singular actions are supported");
                return -EOPNOTSUPP;
        }

        act = &rule->action.entries[0];
        switch (act->id) {
        case FLOW_ACTION_REDIRECT:
        case FLOW_ACTION_TRAP:
        case FLOW_ACTION_DROP:
                return dpaa2_switch_cls_flower_replace_acl(block, cls);
        case FLOW_ACTION_MIRRED:
                return dpaa2_switch_cls_flower_replace_mirror(block, cls);
        default:
                NL_SET_ERR_MSG_MOD(extack, "Action not supported");
                return -EOPNOTSUPP;
        }
}

int dpaa2_switch_cls_flower_destroy(struct dpaa2_switch_filter_block *block,
                                    struct flow_cls_offload *cls)
{
        struct dpaa2_switch_mirror_entry *mirror_entry;
        struct dpaa2_switch_acl_entry *acl_entry;

        /* If this filter is a an ACL one, remove it */
        acl_entry = dpaa2_switch_acl_tbl_find_entry_by_cookie(block,
                                                              cls->cookie);
        if (acl_entry)
                return dpaa2_switch_acl_tbl_remove_entry(block, acl_entry);

        /* If not, then it has to be a mirror */
        mirror_entry = dpaa2_switch_mirror_find_entry_by_cookie(block,
                                                                cls->cookie);
        if (mirror_entry)
                return dpaa2_switch_block_remove_mirror(block,
                                                        mirror_entry);

        return 0;
}

static int
dpaa2_switch_cls_matchall_replace_acl(struct dpaa2_switch_filter_block *block,
                                      struct tc_cls_matchall_offload *cls)
{
        struct netlink_ext_ack *extack = cls->common.extack;
        struct ethsw_core *ethsw = block->ethsw;
        struct dpaa2_switch_acl_entry *acl_entry;
        struct flow_action_entry *act;
        int err;

        if (dpaa2_switch_acl_tbl_is_full(block)) {
                NL_SET_ERR_MSG(extack, "Maximum filter capacity reached");
                return -ENOMEM;
        }

        acl_entry = kzalloc_obj(*acl_entry);
        if (!acl_entry)
                return -ENOMEM;

        act = &cls->rule->action.entries[0];
        err = dpaa2_switch_tc_parse_action_acl(ethsw, act,
                                               &acl_entry->cfg.result, extack);
        if (err)
                goto free_acl_entry;

        acl_entry->prio = cls->common.prio;
        acl_entry->cookie = cls->cookie;

        err = dpaa2_switch_acl_tbl_add_entry(block, acl_entry);
        if (err)
                goto free_acl_entry;

        return 0;

free_acl_entry:
        kfree(acl_entry);

        return err;
}

static int
dpaa2_switch_cls_matchall_replace_mirror(struct dpaa2_switch_filter_block *block,
                                         struct tc_cls_matchall_offload *cls)
{
        struct netlink_ext_ack *extack = cls->common.extack;
        struct dpaa2_switch_mirror_entry *mirror_entry;
        struct ethsw_core *ethsw = block->ethsw;
        struct dpaa2_switch_mirror_entry *tmp;
        struct flow_action_entry *cls_act;
        struct list_head *pos, *n;
        bool mirror_port_enabled;
        u16 if_id;

        mirror_port_enabled = (ethsw->mirror_port != ethsw->sw_attr.num_ifs);
        cls_act = &cls->rule->action.entries[0];

        /* Offload rules only when the destination is a DPAA2 switch port */
        if (!dpaa2_switch_port_dev_check(cls_act->dev)) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Destination not a DPAA2 switch port");
                return -EOPNOTSUPP;
        }
        if_id = dpaa2_switch_get_index(ethsw, cls_act->dev);

        /* We have a single mirror port but can configure egress mirroring on
         * all the other switch ports. We need to allow mirroring rules only
         * when the destination port is the same.
         */
        if (mirror_port_enabled && ethsw->mirror_port != if_id) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Multiple mirror ports not supported");
                return -EBUSY;
        }

        /* Make sure that we don't already have a mirror rule with the same
         * configuration. One matchall rule per block is the maximum.
         */
        list_for_each_safe(pos, n, &block->mirror_entries) {
                tmp = list_entry(pos, struct dpaa2_switch_mirror_entry, list);

                if (tmp->cfg.filter == DPSW_REFLECTION_FILTER_INGRESS_ALL) {
                        NL_SET_ERR_MSG_MOD(extack,
                                           "Matchall mirror filter already installed");
                        return -EBUSY;
                }
        }

        mirror_entry = kzalloc_obj(*mirror_entry);
        if (!mirror_entry)
                return -ENOMEM;

        mirror_entry->cfg.filter = DPSW_REFLECTION_FILTER_INGRESS_ALL;
        mirror_entry->cookie = cls->cookie;

        return dpaa2_switch_block_add_mirror(block, mirror_entry, if_id,
                                             extack);
}

int dpaa2_switch_cls_matchall_replace(struct dpaa2_switch_filter_block *block,
                                      struct tc_cls_matchall_offload *cls)
{
        struct netlink_ext_ack *extack = cls->common.extack;
        struct flow_action_entry *act;

        if (!flow_offload_has_one_action(&cls->rule->action)) {
                NL_SET_ERR_MSG(extack, "Only singular actions are supported");
                return -EOPNOTSUPP;
        }

        act = &cls->rule->action.entries[0];
        switch (act->id) {
        case FLOW_ACTION_REDIRECT:
        case FLOW_ACTION_TRAP:
        case FLOW_ACTION_DROP:
                return dpaa2_switch_cls_matchall_replace_acl(block, cls);
        case FLOW_ACTION_MIRRED:
                return dpaa2_switch_cls_matchall_replace_mirror(block, cls);
        default:
                NL_SET_ERR_MSG_MOD(extack, "Action not supported");
                return -EOPNOTSUPP;
        }
}

int dpaa2_switch_block_offload_mirror(struct dpaa2_switch_filter_block *block,
                                      struct ethsw_port_priv *port_priv)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_mirror_entry *tmp;
        int err;

        list_for_each_entry(tmp, &block->mirror_entries, list) {
                err = dpsw_if_add_reflection(ethsw->mc_io, 0,
                                             ethsw->dpsw_handle,
                                             port_priv->idx, &tmp->cfg);
                if (err)
                        goto unwind_add;
        }

        return 0;

unwind_add:
        list_for_each_entry(tmp, &block->mirror_entries, list)
                dpsw_if_remove_reflection(ethsw->mc_io, 0,
                                          ethsw->dpsw_handle,
                                          port_priv->idx, &tmp->cfg);

        return err;
}

int dpaa2_switch_block_unoffload_mirror(struct dpaa2_switch_filter_block *block,
                                        struct ethsw_port_priv *port_priv)
{
        struct ethsw_core *ethsw = port_priv->ethsw_data;
        struct dpaa2_switch_mirror_entry *tmp;
        int err;

        list_for_each_entry(tmp, &block->mirror_entries, list) {
                err = dpsw_if_remove_reflection(ethsw->mc_io, 0,
                                                ethsw->dpsw_handle,
                                                port_priv->idx, &tmp->cfg);
                if (err)
                        goto unwind_remove;
        }

        return 0;

unwind_remove:
        list_for_each_entry(tmp, &block->mirror_entries, list)
                dpsw_if_add_reflection(ethsw->mc_io, 0, ethsw->dpsw_handle,
                                       port_priv->idx, &tmp->cfg);

        return err;
}

int dpaa2_switch_cls_matchall_destroy(struct dpaa2_switch_filter_block *block,
                                      struct tc_cls_matchall_offload *cls)
{
        struct dpaa2_switch_mirror_entry *mirror_entry;
        struct dpaa2_switch_acl_entry *acl_entry;

        /* If this filter is a an ACL one, remove it */
        acl_entry = dpaa2_switch_acl_tbl_find_entry_by_cookie(block,
                                                              cls->cookie);
        if (acl_entry)
                return dpaa2_switch_acl_tbl_remove_entry(block,
                                                         acl_entry);

        /* If not, then it has to be a mirror */
        mirror_entry = dpaa2_switch_mirror_find_entry_by_cookie(block,
                                                                cls->cookie);
        if (mirror_entry)
                return dpaa2_switch_block_remove_mirror(block,
                                                        mirror_entry);

        return 0;
}