root/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
// SPDX-License-Identifier: GPL-2.0-only
/* Atlantic Network Driver
 *
 * Copyright (C) 2014-2019 aQuantia Corporation
 * Copyright (C) 2019-2020 Marvell International Ltd.
 */

/* File hw_atl_a0.c: Definition of Atlantic hardware specific functions. */

#include "../aq_hw.h"
#include "../aq_hw_utils.h"
#include "../aq_ring.h"
#include "../aq_nic.h"
#include "hw_atl_a0.h"
#include "hw_atl_utils.h"
#include "hw_atl_llh.h"
#include "hw_atl_a0_internal.h"

#define DEFAULT_A0_BOARD_BASIC_CAPABILITIES          \
        .is_64_dma = true,                           \
        .op64bit = false,                            \
        .msix_irqs = 4U,                             \
        .irq_mask = ~0U,                             \
        .vecs = HW_ATL_A0_RSS_MAX,                   \
        .tcs_max = HW_ATL_A0_TC_MAX,                 \
        .rxd_alignment = 1U,                         \
        .rxd_size = HW_ATL_A0_RXD_SIZE,              \
        .rxds_max = HW_ATL_A0_MAX_RXD,               \
        .rxds_min = HW_ATL_A0_MIN_RXD,               \
        .txd_alignment = 1U,                         \
        .txd_size = HW_ATL_A0_TXD_SIZE,              \
        .txds_max = HW_ATL_A0_MAX_TXD,               \
        .txds_min = HW_ATL_A0_MIN_RXD,               \
        .txhwb_alignment = 4096U,                    \
        .tx_rings = HW_ATL_A0_TX_RINGS,              \
        .rx_rings = HW_ATL_A0_RX_RINGS,              \
        .hw_features = NETIF_F_HW_CSUM |             \
                        NETIF_F_RXHASH |             \
                        NETIF_F_RXCSUM |             \
                        NETIF_F_SG |                 \
                        NETIF_F_TSO |                \
                        NETIF_F_NTUPLE |             \
                        NETIF_F_HW_VLAN_CTAG_FILTER, \
        .hw_priv_flags = IFF_UNICAST_FLT,            \
        .flow_control = true,                        \
        .mtu = HW_ATL_A0_MTU_JUMBO,                  \
        .mac_regs_count = 88,                        \
        .hw_alive_check_addr = 0x10U

const struct aq_hw_caps_s hw_atl_a0_caps_aqc100 = {
        DEFAULT_A0_BOARD_BASIC_CAPABILITIES,
        .media_type = AQ_HW_MEDIA_TYPE_FIBRE,
        .link_speed_msk = AQ_NIC_RATE_5G |
                          AQ_NIC_RATE_2G5 |
                          AQ_NIC_RATE_1G |
                          AQ_NIC_RATE_100M,
};

const struct aq_hw_caps_s hw_atl_a0_caps_aqc107 = {
        DEFAULT_A0_BOARD_BASIC_CAPABILITIES,
        .media_type = AQ_HW_MEDIA_TYPE_TP,
        .link_speed_msk = AQ_NIC_RATE_10G |
                          AQ_NIC_RATE_5G |
                          AQ_NIC_RATE_2G5 |
                          AQ_NIC_RATE_1G |
                          AQ_NIC_RATE_100M,
};

const struct aq_hw_caps_s hw_atl_a0_caps_aqc108 = {
        DEFAULT_A0_BOARD_BASIC_CAPABILITIES,
        .media_type = AQ_HW_MEDIA_TYPE_TP,
        .link_speed_msk = AQ_NIC_RATE_5G |
                          AQ_NIC_RATE_2G5 |
                          AQ_NIC_RATE_1G |
                          AQ_NIC_RATE_100M,
};

const struct aq_hw_caps_s hw_atl_a0_caps_aqc109 = {
        DEFAULT_A0_BOARD_BASIC_CAPABILITIES,
        .media_type = AQ_HW_MEDIA_TYPE_TP,
        .link_speed_msk = AQ_NIC_RATE_2G5 |
                          AQ_NIC_RATE_1G |
                          AQ_NIC_RATE_100M,
};

static int hw_atl_a0_hw_reset(struct aq_hw_s *self)
{
        int err = 0;
        u32 val;

        hw_atl_glb_glb_reg_res_dis_set(self, 1U);
        hw_atl_pci_pci_reg_res_dis_set(self, 0U);
        hw_atl_rx_rx_reg_res_dis_set(self, 0U);
        hw_atl_tx_tx_reg_res_dis_set(self, 0U);

        HW_ATL_FLUSH();
        hw_atl_glb_soft_res_set(self, 1);

        /* check 10 times by 1ms */
        err = readx_poll_timeout_atomic(hw_atl_glb_soft_res_get,
                                        self, val, val == 0,
                                        1000U, 10000U);
        if (err < 0)
                goto err_exit;

        hw_atl_itr_irq_reg_res_dis_set(self, 0U);
        hw_atl_itr_res_irq_set(self, 1U);

        /* check 10 times by 1ms */
        err = readx_poll_timeout_atomic(hw_atl_itr_res_irq_get,
                                        self, val, val == 0,
                                        1000U, 10000U);
        if (err < 0)
                goto err_exit;

        self->aq_fw_ops->set_state(self, MPI_RESET);

        err = aq_hw_err_from_flags(self);

err_exit:
        return err;
}

static int hw_atl_a0_hw_qos_set(struct aq_hw_s *self)
{
        bool is_rx_flow_control = false;
        unsigned int i_priority = 0U;
        u32 buff_size = 0U;
        u32 tc = 0U;

        /* TPS Descriptor rate init */
        hw_atl_tps_tx_pkt_shed_desc_rate_curr_time_res_set(self, 0x0U);
        hw_atl_tps_tx_pkt_shed_desc_rate_lim_set(self, 0xA);

        /* TPS VM init */
        hw_atl_tps_tx_pkt_shed_desc_vm_arb_mode_set(self, 0U);

        /* TPS TC credits init */
        hw_atl_tps_tx_pkt_shed_desc_tc_arb_mode_set(self, 0U);
        hw_atl_tps_tx_pkt_shed_data_arb_mode_set(self, 0U);

        hw_atl_tps_tx_pkt_shed_tc_data_max_credit_set(self, 0U, 0xFFF);
        hw_atl_tps_tx_pkt_shed_tc_data_weight_set(self, 0U, 0x64);
        hw_atl_tps_tx_pkt_shed_desc_tc_max_credit_set(self, 0U, 0x50);
        hw_atl_tps_tx_pkt_shed_desc_tc_weight_set(self, 0U, 0x1E);

        /* Tx buf size */
        buff_size = HW_ATL_A0_TXBUF_MAX;

        hw_atl_tpb_tx_pkt_buff_size_per_tc_set(self, buff_size, tc);
        hw_atl_tpb_tx_buff_hi_threshold_per_tc_set(self,
                                                   (buff_size *
                                                   (1024 / 32U) * 66U) /
                                                   100U, tc);
        hw_atl_tpb_tx_buff_lo_threshold_per_tc_set(self,
                                                   (buff_size *
                                                   (1024 / 32U) * 50U) /
                                                   100U, tc);

        /* QoS Rx buf size per TC */
        tc = 0;
        is_rx_flow_control = (AQ_NIC_FC_RX & self->aq_nic_cfg->fc.req);
        buff_size = HW_ATL_A0_RXBUF_MAX;

        hw_atl_rpb_rx_pkt_buff_size_per_tc_set(self, buff_size, tc);
        hw_atl_rpb_rx_buff_hi_threshold_per_tc_set(self,
                                                   (buff_size *
                                                   (1024U / 32U) * 66U) /
                                                   100U, tc);
        hw_atl_rpb_rx_buff_lo_threshold_per_tc_set(self,
                                                   (buff_size *
                                                   (1024U / 32U) * 50U) /
                                                   100U, tc);
        hw_atl_rpb_rx_xoff_en_per_tc_set(self, is_rx_flow_control ? 1U : 0U, tc);

        /* QoS 802.1p priority -> TC mapping */
        for (i_priority = 8U; i_priority--;)
                hw_atl_rpf_rpb_user_priority_tc_map_set(self, i_priority, 0U);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_rss_hash_set(struct aq_hw_s *self,
                                     struct aq_rss_parameters *rss_params)
{
        struct aq_nic_cfg_s *cfg = self->aq_nic_cfg;
        unsigned int addr = 0U;
        unsigned int i = 0U;
        int err = 0;
        u32 val;

        for (i = 10, addr = 0U; i--; ++addr) {
                u32 key_data = cfg->is_rss ?
                        __swab32(rss_params->hash_secret_key[i]) : 0U;
                hw_atl_rpf_rss_key_wr_data_set(self, key_data);
                hw_atl_rpf_rss_key_addr_set(self, addr);
                hw_atl_rpf_rss_key_wr_en_set(self, 1U);
                err = readx_poll_timeout_atomic(hw_atl_rpf_rss_key_wr_en_get,
                                                self, val, val == 0,
                                                1000U, 10000U);
                if (err < 0)
                        goto err_exit;
        }

        err = aq_hw_err_from_flags(self);

err_exit:
        return err;
}

static int hw_atl_a0_hw_rss_set(struct aq_hw_s *self,
                                struct aq_rss_parameters *rss_params)
{
        u32 num_rss_queues = max(1U, self->aq_nic_cfg->num_rss_queues);
        u8 *indirection_table = rss_params->indirection_table;
        u16 bitary[1 + (HW_ATL_A0_RSS_REDIRECTION_MAX *
                   HW_ATL_A0_RSS_REDIRECTION_BITS / 16U)];
        int err = 0;
        u32 i = 0U;
        u32 val;

        memset(bitary, 0, sizeof(bitary));

        for (i = HW_ATL_A0_RSS_REDIRECTION_MAX; i--; ) {
                (*(u32 *)(bitary + ((i * 3U) / 16U))) |=
                        ((indirection_table[i] % num_rss_queues) <<
                        ((i * 3U) & 0xFU));
        }

        for (i = ARRAY_SIZE(bitary); i--;) {
                hw_atl_rpf_rss_redir_tbl_wr_data_set(self, bitary[i]);
                hw_atl_rpf_rss_redir_tbl_addr_set(self, i);
                hw_atl_rpf_rss_redir_wr_en_set(self, 1U);
                err = readx_poll_timeout_atomic(hw_atl_rpf_rss_redir_wr_en_get,
                                                self, val, val == 0,
                                                1000U, 10000U);
                if (err < 0)
                        goto err_exit;
        }

        err = aq_hw_err_from_flags(self);

err_exit:
        return err;
}

static int hw_atl_a0_hw_offload_set(struct aq_hw_s *self,
                                    struct aq_nic_cfg_s *aq_nic_cfg)
{
        /* TX checksums offloads*/
        hw_atl_tpo_ipv4header_crc_offload_en_set(self, 1);
        hw_atl_tpo_tcp_udp_crc_offload_en_set(self, 1);

        /* RX checksums offloads*/
        hw_atl_rpo_ipv4header_crc_offload_en_set(self, 1);
        hw_atl_rpo_tcp_udp_crc_offload_en_set(self, 1);

        /* LSO offloads*/
        hw_atl_tdm_large_send_offload_en_set(self, 0xFFFFFFFFU);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_init_tx_path(struct aq_hw_s *self)
{
        hw_atl_thm_lso_tcp_flag_of_first_pkt_set(self, 0x0FF6U);
        hw_atl_thm_lso_tcp_flag_of_middle_pkt_set(self, 0x0FF6U);
        hw_atl_thm_lso_tcp_flag_of_last_pkt_set(self, 0x0F7FU);

        /* Tx interrupts */
        hw_atl_tdm_tx_desc_wr_wb_irq_en_set(self, 1U);

        /* misc */
        aq_hw_write_reg(self, 0x00007040U, 0x00000000U);
        hw_atl_tdm_tx_dca_en_set(self, 0U);
        hw_atl_tdm_tx_dca_mode_set(self, 0U);

        hw_atl_tpb_tx_path_scp_ins_en_set(self, 1U);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_init_rx_path(struct aq_hw_s *self)
{
        struct aq_nic_cfg_s *cfg = self->aq_nic_cfg;
        int i;

        /* Rx TC/RSS number config */
        hw_atl_rpb_rpf_rx_traf_class_mode_set(self, 1U);

        /* Rx flow control */
        hw_atl_rpb_rx_flow_ctl_mode_set(self, 1U);

        /* RSS Ring selection */
        hw_atl_reg_rx_flr_rss_control1set(self, cfg->is_rss ?
                                          0xB3333333U : 0x00000000U);

        /* Multicast filters */
        for (i = HW_ATL_A0_MAC_MAX; i--;) {
                hw_atl_rpfl2_uc_flr_en_set(self, (i == 0U) ? 1U : 0U, i);
                hw_atl_rpfl2unicast_flr_act_set(self, 1U, i);
        }

        hw_atl_reg_rx_flr_mcst_flr_msk_set(self, 0x00000000U);
        hw_atl_reg_rx_flr_mcst_flr_set(self, 0x00010FFFU, 0U);

        /* Vlan filters */
        hw_atl_rpf_vlan_outer_etht_set(self, 0x88A8U);
        hw_atl_rpf_vlan_inner_etht_set(self, 0x8100U);
        hw_atl_rpf_vlan_prom_mode_en_set(self, 1);

        /* Rx Interrupts */
        hw_atl_rdm_rx_desc_wr_wb_irq_en_set(self, 1U);

        /* misc */
        hw_atl_rpfl2broadcast_flr_act_set(self, 1U);
        hw_atl_rpfl2broadcast_count_threshold_set(self, 0xFFFFU & (~0U / 256U));

        hw_atl_rdm_rx_dca_en_set(self, 0U);
        hw_atl_rdm_rx_dca_mode_set(self, 0U);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_mac_addr_set(struct aq_hw_s *self, const u8 *mac_addr)
{
        unsigned int h = 0U;
        unsigned int l = 0U;
        int err = 0;

        if (!mac_addr) {
                err = -EINVAL;
                goto err_exit;
        }

        h = (mac_addr[0] << 8) | (mac_addr[1]);
        l = (mac_addr[2] << 24) | (mac_addr[3] << 16) |
            (mac_addr[4] << 8) | mac_addr[5];

        hw_atl_rpfl2_uc_flr_en_set(self, 0U, HW_ATL_A0_MAC);
        hw_atl_rpfl2unicast_dest_addresslsw_set(self, l, HW_ATL_A0_MAC);
        hw_atl_rpfl2unicast_dest_addressmsw_set(self, h, HW_ATL_A0_MAC);
        hw_atl_rpfl2_uc_flr_en_set(self, 1U, HW_ATL_A0_MAC);

        err = aq_hw_err_from_flags(self);

err_exit:
        return err;
}

static int hw_atl_a0_hw_init(struct aq_hw_s *self, const u8 *mac_addr)
{
        static u32 aq_hw_atl_igcr_table_[4][2] = {
                [AQ_HW_IRQ_INVALID] = { 0x20000000U, 0x20000000U },
                [AQ_HW_IRQ_INTX]    = { 0x20000080U, 0x20000080U },
                [AQ_HW_IRQ_MSI]     = { 0x20000021U, 0x20000025U },
                [AQ_HW_IRQ_MSIX]    = { 0x20000022U, 0x20000026U },
        };
        struct aq_nic_cfg_s *aq_nic_cfg = self->aq_nic_cfg;
        int err = 0;

        hw_atl_a0_hw_init_tx_path(self);
        hw_atl_a0_hw_init_rx_path(self);

        hw_atl_a0_hw_mac_addr_set(self, mac_addr);

        self->aq_fw_ops->set_link_speed(self, aq_nic_cfg->link_speed_msk);
        self->aq_fw_ops->set_state(self, MPI_INIT);

        hw_atl_reg_tx_dma_debug_ctl_set(self, 0x800000b8U);
        hw_atl_reg_tx_dma_debug_ctl_set(self, 0x000000b8U);

        hw_atl_a0_hw_qos_set(self);
        hw_atl_a0_hw_rss_set(self, &aq_nic_cfg->aq_rss);
        hw_atl_a0_hw_rss_hash_set(self, &aq_nic_cfg->aq_rss);

        /* Reset link status and read out initial hardware counters */
        self->aq_link_status.mbps = 0;
        self->aq_fw_ops->update_stats(self);

        err = aq_hw_err_from_flags(self);
        if (err < 0)
                goto err_exit;

        /* Interrupts */
        hw_atl_reg_irq_glb_ctl_set(self,
                                   aq_hw_atl_igcr_table_[aq_nic_cfg->irq_type]
                                        [(aq_nic_cfg->vecs > 1U) ? 1 : 0]);

        hw_atl_itr_irq_auto_masklsw_set(self, aq_nic_cfg->aq_hw_caps->irq_mask);

        /* Interrupts */
        hw_atl_reg_gen_irq_map_set(self,
                                   ((HW_ATL_A0_ERR_INT << 0x18) | (1U << 0x1F)) |
                                   ((HW_ATL_A0_ERR_INT << 0x10) | (1U << 0x17)) |
                                   ((HW_ATL_A0_ERR_INT << 8) | (1U << 0xF)) |
                                   ((HW_ATL_A0_ERR_INT) | (1U << 0x7)), 0U);

        hw_atl_a0_hw_offload_set(self, aq_nic_cfg);

err_exit:
        return err;
}

static int hw_atl_a0_hw_ring_tx_start(struct aq_hw_s *self,
                                      struct aq_ring_s *ring)
{
        hw_atl_tdm_tx_desc_en_set(self, 1, ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_rx_start(struct aq_hw_s *self,
                                      struct aq_ring_s *ring)
{
        hw_atl_rdm_rx_desc_en_set(self, 1, ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_start(struct aq_hw_s *self)
{
        hw_atl_tpb_tx_buff_en_set(self, 1);
        hw_atl_rpb_rx_buff_en_set(self, 1);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_tx_ring_tail_update(struct aq_hw_s *self,
                                            struct aq_ring_s *ring)
{
        hw_atl_reg_tx_dma_desc_tail_ptr_set(self, ring->sw_tail, ring->idx);

        return 0;
}

static int hw_atl_a0_hw_ring_tx_xmit(struct aq_hw_s *self,
                                     struct aq_ring_s *ring,
                                     unsigned int frags)
{
        struct aq_ring_buff_s *buff = NULL;
        struct hw_atl_txd_s *txd = NULL;
        unsigned int buff_pa_len = 0U;
        unsigned int frag_count = 0U;
        unsigned int pkt_len = 0U;
        bool is_gso = false;

        buff = &ring->buff_ring[ring->sw_tail];
        pkt_len = (buff->is_eop && buff->is_sop) ? buff->len : buff->len_pkt;

        for (frag_count = 0; frag_count < frags; frag_count++) {
                txd = (struct hw_atl_txd_s *)&ring->dx_ring[ring->sw_tail *
                                                HW_ATL_A0_TXD_SIZE];
                txd->ctl = 0;
                txd->ctl2 = 0;
                txd->buf_addr = 0;

                buff = &ring->buff_ring[ring->sw_tail];

                if (buff->is_gso_tcp) {
                        txd->ctl |= (buff->len_l3 << 31) |
                                (buff->len_l2 << 24) |
                                HW_ATL_A0_TXD_CTL_CMD_TCP |
                                HW_ATL_A0_TXD_CTL_DESC_TYPE_TXC;
                        txd->ctl2 |= (buff->mss << 16) |
                                (buff->len_l4 << 8) |
                                (buff->len_l3 >> 1);

                        pkt_len -= (buff->len_l4 +
                                    buff->len_l3 +
                                    buff->len_l2);
                        is_gso = true;

                        if (buff->is_ipv6)
                                txd->ctl |= HW_ATL_A0_TXD_CTL_CMD_IPV6;
                } else {
                        buff_pa_len = buff->len;

                        txd->buf_addr = buff->pa;
                        txd->ctl |= (HW_ATL_A0_TXD_CTL_BLEN &
                                                ((u32)buff_pa_len << 4));
                        txd->ctl |= HW_ATL_A0_TXD_CTL_DESC_TYPE_TXD;
                        /* PAY_LEN */
                        txd->ctl2 |= HW_ATL_A0_TXD_CTL2_LEN & (pkt_len << 14);

                        if (is_gso) {
                                txd->ctl |= HW_ATL_A0_TXD_CTL_CMD_LSO;
                                txd->ctl2 |= HW_ATL_A0_TXD_CTL2_CTX_EN;
                        }

                        /* Tx checksum offloads */
                        if (buff->is_ip_cso)
                                txd->ctl |= HW_ATL_A0_TXD_CTL_CMD_IPCSO;

                        if (buff->is_udp_cso || buff->is_tcp_cso)
                                txd->ctl |= HW_ATL_A0_TXD_CTL_CMD_TUCSO;

                        if (unlikely(buff->is_eop)) {
                                txd->ctl |= HW_ATL_A0_TXD_CTL_EOP;
                                txd->ctl |= HW_ATL_A0_TXD_CTL_CMD_WB;
                                is_gso = false;
                        }
                }

                ring->sw_tail = aq_ring_next_dx(ring, ring->sw_tail);
        }

        hw_atl_a0_hw_tx_ring_tail_update(self, ring);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_rx_init(struct aq_hw_s *self,
                                     struct aq_ring_s *aq_ring,
                                     struct aq_ring_param_s *aq_ring_param)
{
        u32 dma_desc_addr_msw = (u32)(((u64)aq_ring->dx_ring_pa) >> 32);
        u32 dma_desc_addr_lsw = (u32)aq_ring->dx_ring_pa;

        hw_atl_rdm_rx_desc_en_set(self, false, aq_ring->idx);

        hw_atl_rdm_rx_desc_head_splitting_set(self, 0U, aq_ring->idx);

        hw_atl_reg_rx_dma_desc_base_addresslswset(self, dma_desc_addr_lsw,
                                                  aq_ring->idx);

        hw_atl_reg_rx_dma_desc_base_addressmswset(self,
                                                  dma_desc_addr_msw,
                                                  aq_ring->idx);

        hw_atl_rdm_rx_desc_len_set(self, aq_ring->size / 8U, aq_ring->idx);

        hw_atl_rdm_rx_desc_data_buff_size_set(self,
                                              aq_ring->frame_max / 1024U,
                                              aq_ring->idx);

        hw_atl_rdm_rx_desc_head_buff_size_set(self, 0U, aq_ring->idx);
        hw_atl_rdm_rx_desc_head_splitting_set(self, 0U, aq_ring->idx);
        hw_atl_rpo_rx_desc_vlan_stripping_set(self, 0U, aq_ring->idx);

        /* Rx ring set mode */

        /* Mapping interrupt vector */
        hw_atl_itr_irq_map_rx_set(self, aq_ring_param->vec_idx, aq_ring->idx);
        hw_atl_itr_irq_map_en_rx_set(self, true, aq_ring->idx);

        hw_atl_rdm_cpu_id_set(self, aq_ring_param->cpu, aq_ring->idx);
        hw_atl_rdm_rx_desc_dca_en_set(self, 0U, aq_ring->idx);
        hw_atl_rdm_rx_head_dca_en_set(self, 0U, aq_ring->idx);
        hw_atl_rdm_rx_pld_dca_en_set(self, 0U, aq_ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_tx_init(struct aq_hw_s *self,
                                     struct aq_ring_s *aq_ring,
                                     struct aq_ring_param_s *aq_ring_param)
{
        u32 dma_desc_msw_addr = (u32)(((u64)aq_ring->dx_ring_pa) >> 32);
        u32 dma_desc_lsw_addr = (u32)aq_ring->dx_ring_pa;

        hw_atl_reg_tx_dma_desc_base_addresslswset(self, dma_desc_lsw_addr,
                                                  aq_ring->idx);

        hw_atl_reg_tx_dma_desc_base_addressmswset(self, dma_desc_msw_addr,
                                                  aq_ring->idx);

        hw_atl_tdm_tx_desc_len_set(self, aq_ring->size / 8U, aq_ring->idx);

        hw_atl_a0_hw_tx_ring_tail_update(self, aq_ring);

        /* Set Tx threshold */
        hw_atl_tdm_tx_desc_wr_wb_threshold_set(self, 0U, aq_ring->idx);

        /* Mapping interrupt vector */
        hw_atl_itr_irq_map_tx_set(self, aq_ring_param->vec_idx, aq_ring->idx);
        hw_atl_itr_irq_map_en_tx_set(self, true, aq_ring->idx);

        hw_atl_tdm_cpu_id_set(self, aq_ring_param->cpu, aq_ring->idx);
        hw_atl_tdm_tx_desc_dca_en_set(self, 0U, aq_ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_rx_fill(struct aq_hw_s *self,
                                     struct aq_ring_s *ring,
                                     unsigned int sw_tail_old)
{
        for (; sw_tail_old != ring->sw_tail;
                sw_tail_old = aq_ring_next_dx(ring, sw_tail_old)) {
                struct hw_atl_rxd_s *rxd =
                        (struct hw_atl_rxd_s *)&ring->dx_ring[sw_tail_old *
                                                        HW_ATL_A0_RXD_SIZE];

                struct aq_ring_buff_s *buff = &ring->buff_ring[sw_tail_old];

                rxd->buf_addr = buff->pa;
                rxd->hdr_addr = 0U;
        }

        hw_atl_reg_rx_dma_desc_tail_ptr_set(self, sw_tail_old, ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_tx_head_update(struct aq_hw_s *self,
                                            struct aq_ring_s *ring)
{
        unsigned int hw_head = hw_atl_tdm_tx_desc_head_ptr_get(self, ring->idx);
        int err = 0;

        if (aq_utils_obj_test(&self->flags, AQ_HW_FLAG_ERR_UNPLUG)) {
                err = -ENXIO;
                goto err_exit;
        }
        ring->hw_head = hw_head;
        err = aq_hw_err_from_flags(self);

err_exit:
        return err;
}

static int hw_atl_a0_hw_ring_rx_receive(struct aq_hw_s *self,
                                        struct aq_ring_s *ring)
{
        for (; ring->hw_head != ring->sw_tail;
                ring->hw_head = aq_ring_next_dx(ring, ring->hw_head)) {
                struct aq_ring_buff_s *buff = NULL;
                struct hw_atl_rxd_wb_s *rxd_wb = (struct hw_atl_rxd_wb_s *)
                        &ring->dx_ring[ring->hw_head * HW_ATL_A0_RXD_SIZE];

                unsigned int is_err = 1U;
                unsigned int is_rx_check_sum_enabled = 0U;
                unsigned int pkt_type = 0U;

                if (!(rxd_wb->status & 0x5U)) { /* RxD is not done */
                        if ((1U << 4) &
                        hw_atl_reg_rx_dma_desc_status_get(self, ring->idx)) {
                                hw_atl_rdm_rx_desc_en_set(self, false, ring->idx);
                                hw_atl_rdm_rx_desc_res_set(self, true, ring->idx);
                                hw_atl_rdm_rx_desc_res_set(self, false, ring->idx);
                                hw_atl_rdm_rx_desc_en_set(self, true, ring->idx);
                        }

                        if (ring->hw_head ||
                            (hw_atl_rdm_rx_desc_head_ptr_get(self,
                                                             ring->idx) < 2U)) {
                                break;
                        } else if (!(rxd_wb->status & 0x1U)) {
                                struct hw_atl_rxd_wb_s *rxd_wb1 =
                                        (struct hw_atl_rxd_wb_s *)
                                        (&ring->dx_ring[(1U) *
                                                HW_ATL_A0_RXD_SIZE]);

                                if ((rxd_wb1->status & 0x1U)) {
                                        rxd_wb->pkt_len = 1514U;
                                        rxd_wb->status = 3U;
                                } else {
                                        break;
                                }
                        }
                }

                buff = &ring->buff_ring[ring->hw_head];

                if (0x3U != (rxd_wb->status & 0x3U))
                        rxd_wb->status |= 4;

                is_err = (0x0000001CU & rxd_wb->status);
                is_rx_check_sum_enabled = (rxd_wb->type) & (0x3U << 19);
                pkt_type = 0xFFU & (rxd_wb->type >> 4);

                if (is_rx_check_sum_enabled) {
                        if (0x0U == (pkt_type & 0x3U))
                                buff->is_ip_cso = (is_err & 0x08U) ? 0 : 1;

                        if (0x4U == (pkt_type & 0x1CU))
                                buff->is_udp_cso = (is_err & 0x10U) ? 0 : 1;
                        else if (0x0U == (pkt_type & 0x1CU))
                                buff->is_tcp_cso = (is_err & 0x10U) ? 0 : 1;

                        /* Checksum offload workaround for small packets */
                        if (rxd_wb->pkt_len <= 60) {
                                buff->is_ip_cso = 0U;
                                buff->is_cso_err = 0U;
                        }
                }

                is_err &= ~0x18U;
                is_err &= ~0x04U;

                if (is_err || rxd_wb->type & 0x1000U) {
                        /* status error or DMA error */
                        buff->is_error = 1U;
                } else {
                        if (self->aq_nic_cfg->is_rss) {
                                /* last 4 byte */
                                u16 rss_type = rxd_wb->type & 0xFU;

                                if (rss_type && rss_type < 0x8U) {
                                        buff->is_hash_l4 = (rss_type == 0x4 ||
                                                        rss_type == 0x5);
                                        buff->rss_hash = rxd_wb->rss_hash;
                                }
                        }

                        if (HW_ATL_A0_RXD_WB_STAT2_EOP & rxd_wb->status) {
                                buff->len = rxd_wb->pkt_len %
                                            ring->frame_max;
                                buff->len = buff->len ?
                                        buff->len : ring->frame_max;
                                buff->next = 0U;
                                buff->is_eop = 1U;
                        } else {
                                /* jumbo */
                                buff->next = aq_ring_next_dx(ring,
                                                             ring->hw_head);
                                ++ring->stats.rx.jumbo_packets;
                        }
                }
        }

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_irq_enable(struct aq_hw_s *self, u64 mask)
{
        hw_atl_itr_irq_msk_setlsw_set(self, LODWORD(mask) |
                               (1U << HW_ATL_A0_ERR_INT));

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_irq_disable(struct aq_hw_s *self, u64 mask)
{
        hw_atl_itr_irq_msk_clearlsw_set(self, LODWORD(mask));
        hw_atl_itr_irq_status_clearlsw_set(self, LODWORD(mask));

        if ((1U << 16) & hw_atl_reg_gen_irq_status_get(self))
                atomic_inc(&self->dpc);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_irq_read(struct aq_hw_s *self, u64 *mask)
{
        *mask = hw_atl_itr_irq_statuslsw_get(self);

        return aq_hw_err_from_flags(self);
}

#define IS_FILTER_ENABLED(_F_) ((packet_filter & (_F_)) ? 1U : 0U)

static int hw_atl_a0_hw_packet_filter_set(struct aq_hw_s *self,
                                          unsigned int packet_filter)
{
        struct aq_nic_cfg_s *cfg = self->aq_nic_cfg;
        unsigned int i = 0U;

        hw_atl_rpfl2promiscuous_mode_en_set(self,
                                            IS_FILTER_ENABLED(IFF_PROMISC));
        hw_atl_rpfl2multicast_flr_en_set(self,
                                         IS_FILTER_ENABLED(IFF_MULTICAST), 0);
        hw_atl_rpfl2broadcast_en_set(self, IS_FILTER_ENABLED(IFF_BROADCAST));

        cfg->is_mc_list_enabled = IS_FILTER_ENABLED(IFF_MULTICAST);

        for (i = HW_ATL_A0_MAC_MIN; i < HW_ATL_A0_MAC_MAX; ++i)
                hw_atl_rpfl2_uc_flr_en_set(self,
                                           (cfg->is_mc_list_enabled &&
                                            (i <= cfg->mc_list_count)) ? 1U : 0U,
                                           i);

        return aq_hw_err_from_flags(self);
}

#undef IS_FILTER_ENABLED

static int hw_atl_a0_hw_multicast_list_set(struct aq_hw_s *self,
                                           u8 ar_mac
                                           [AQ_HW_MULTICAST_ADDRESS_MAX]
                                           [ETH_ALEN],
                                           u32 count)
{
        struct aq_nic_cfg_s *cfg = self->aq_nic_cfg;
        int err = 0;

        if (count > (HW_ATL_A0_MAC_MAX - HW_ATL_A0_MAC_MIN)) {
                err = -EBADRQC;
                goto err_exit;
        }
        for (cfg->mc_list_count = 0U; cfg->mc_list_count < count; ++cfg->mc_list_count) {
                u32 i = cfg->mc_list_count;
                u32 h = (ar_mac[i][0] << 8) | (ar_mac[i][1]);
                u32 l = (ar_mac[i][2] << 24) | (ar_mac[i][3] << 16) |
                        (ar_mac[i][4] << 8) | ar_mac[i][5];

                hw_atl_rpfl2_uc_flr_en_set(self, 0U, HW_ATL_A0_MAC_MIN + i);

                hw_atl_rpfl2unicast_dest_addresslsw_set(self,
                                                        l,
                                                        HW_ATL_A0_MAC_MIN + i);

                hw_atl_rpfl2unicast_dest_addressmsw_set(self,
                                                        h,
                                                        HW_ATL_A0_MAC_MIN + i);

                hw_atl_rpfl2_uc_flr_en_set(self,
                                           (cfg->is_mc_list_enabled),
                                           HW_ATL_A0_MAC_MIN + i);
        }

        err = aq_hw_err_from_flags(self);

err_exit:
        return err;
}

static int hw_atl_a0_hw_interrupt_moderation_set(struct aq_hw_s *self)
{
        unsigned int i = 0U;
        u32 itr_rx;

        if (self->aq_nic_cfg->itr) {
                if (self->aq_nic_cfg->itr != AQ_CFG_INTERRUPT_MODERATION_AUTO) {
                        u32 itr_ = (self->aq_nic_cfg->itr >> 1);

                        itr_ = min(AQ_CFG_IRQ_MASK, itr_);

                        itr_rx = 0x80000000U | (itr_ << 0x10);
                } else  {
                        u32 n = 0xFFFFU & aq_hw_read_reg(self, 0x00002A00U);

                        if (n < self->aq_link_status.mbps) {
                                itr_rx = 0U;
                        } else {
                                static unsigned int hw_timers_tbl_[] = {
                                        0x01CU, /* 10Gbit */
                                        0x039U, /* 5Gbit */
                                        0x039U, /* 5Gbit 5GS */
                                        0x073U, /* 2.5Gbit */
                                        0x120U, /* 1Gbit */
                                        0x1FFU, /* 100Mbit */
                                };

                                unsigned int speed_index =
                                        hw_atl_utils_mbps_2_speed_index(
                                                self->aq_link_status.mbps);

                                itr_rx = 0x80000000U |
                                        (hw_timers_tbl_[speed_index] << 0x10U);
                        }

                        aq_hw_write_reg(self, 0x00002A00U, 0x40000000U);
                        aq_hw_write_reg(self, 0x00002A00U, 0x8D000000U);
                }
        } else {
                itr_rx = 0U;
        }

        for (i = HW_ATL_A0_RINGS_MAX; i--;)
                hw_atl_reg_irq_thr_set(self, itr_rx, i);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_stop(struct aq_hw_s *self)
{
        hw_atl_a0_hw_irq_disable(self, HW_ATL_A0_INT_MASK);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_tx_stop(struct aq_hw_s *self,
                                     struct aq_ring_s *ring)
{
        hw_atl_tdm_tx_desc_en_set(self, 0U, ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_ring_rx_stop(struct aq_hw_s *self,
                                     struct aq_ring_s *ring)
{
        hw_atl_rdm_rx_desc_en_set(self, 0U, ring->idx);

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_fl3l4_clear(struct aq_hw_s *self,
                                    struct aq_rx_filter_l3l4 *data)
{
        u8 location = data->location;

        if (!data->is_ipv6) {
                hw_atl_rpfl3l4_cmd_clear(self, location);
                hw_atl_rpf_l4_spd_set(self, 0U, location);
                hw_atl_rpf_l4_dpd_set(self, 0U, location);
                hw_atl_rpfl3l4_ipv4_src_addr_clear(self, location);
                hw_atl_rpfl3l4_ipv4_dest_addr_clear(self, location);
        } else {
                int i;

                for (i = 0; i < HW_ATL_RX_CNT_REG_ADDR_IPV6; ++i) {
                        hw_atl_rpfl3l4_cmd_clear(self, location + i);
                        hw_atl_rpf_l4_spd_set(self, 0U, location + i);
                        hw_atl_rpf_l4_dpd_set(self, 0U, location + i);
                }
                hw_atl_rpfl3l4_ipv6_src_addr_clear(self, location);
                hw_atl_rpfl3l4_ipv6_dest_addr_clear(self, location);
        }

        return aq_hw_err_from_flags(self);
}

static int hw_atl_a0_hw_fl3l4_set(struct aq_hw_s *self,
                                  struct aq_rx_filter_l3l4 *data)
{
        u8 location = data->location;

        hw_atl_a0_hw_fl3l4_clear(self, data);

        if (data->cmd) {
                if (!data->is_ipv6) {
                        hw_atl_rpfl3l4_ipv4_dest_addr_set(self,
                                                          location,
                                                          data->ip_dst[0]);
                        hw_atl_rpfl3l4_ipv4_src_addr_set(self,
                                                         location,
                                                         data->ip_src[0]);
                } else {
                        hw_atl_rpfl3l4_ipv6_dest_addr_set(self,
                                                          location,
                                                          data->ip_dst);
                        hw_atl_rpfl3l4_ipv6_src_addr_set(self,
                                                         location,
                                                         data->ip_src);
                }
        }
        hw_atl_rpf_l4_dpd_set(self, data->p_dst, location);
        hw_atl_rpf_l4_spd_set(self, data->p_src, location);
        hw_atl_rpfl3l4_cmd_set(self, location, data->cmd);

        return aq_hw_err_from_flags(self);
}

const struct aq_hw_ops hw_atl_ops_a0 = {
        .hw_soft_reset        = hw_atl_utils_soft_reset,
        .hw_prepare           = hw_atl_utils_initfw,
        .hw_set_mac_address   = hw_atl_a0_hw_mac_addr_set,
        .hw_init              = hw_atl_a0_hw_init,
        .hw_reset             = hw_atl_a0_hw_reset,
        .hw_start             = hw_atl_a0_hw_start,
        .hw_ring_tx_start     = hw_atl_a0_hw_ring_tx_start,
        .hw_ring_tx_stop      = hw_atl_a0_hw_ring_tx_stop,
        .hw_ring_rx_start     = hw_atl_a0_hw_ring_rx_start,
        .hw_ring_rx_stop      = hw_atl_a0_hw_ring_rx_stop,
        .hw_stop              = hw_atl_a0_hw_stop,

        .hw_ring_tx_xmit         = hw_atl_a0_hw_ring_tx_xmit,
        .hw_ring_tx_head_update  = hw_atl_a0_hw_ring_tx_head_update,

        .hw_ring_rx_receive      = hw_atl_a0_hw_ring_rx_receive,
        .hw_ring_rx_fill         = hw_atl_a0_hw_ring_rx_fill,

        .hw_irq_enable           = hw_atl_a0_hw_irq_enable,
        .hw_irq_disable          = hw_atl_a0_hw_irq_disable,
        .hw_irq_read             = hw_atl_a0_hw_irq_read,

        .hw_ring_rx_init             = hw_atl_a0_hw_ring_rx_init,
        .hw_ring_tx_init             = hw_atl_a0_hw_ring_tx_init,
        .hw_packet_filter_set        = hw_atl_a0_hw_packet_filter_set,
        .hw_filter_l3l4_set          = hw_atl_a0_hw_fl3l4_set,
        .hw_multicast_list_set       = hw_atl_a0_hw_multicast_list_set,
        .hw_interrupt_moderation_set = hw_atl_a0_hw_interrupt_moderation_set,
        .hw_rss_set                  = hw_atl_a0_hw_rss_set,
        .hw_rss_hash_set             = hw_atl_a0_hw_rss_hash_set,
        .hw_get_regs                 = hw_atl_utils_hw_get_regs,
        .hw_get_hw_stats             = hw_atl_utils_get_hw_stats,
        .hw_get_fw_version           = hw_atl_utils_get_fw_version,
};