text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * aQuantia Corporation Network Driver
   * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
   */
  
  /* 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,		  \
  	.msix_irqs = 4U,		  \
  	.irq_mask = ~0U,		  \
  	.vecs = HW_ATL_A0_RSS_MAX,	  \
  	.tcs = 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,	  \
  	.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_2GS |
  			  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_2GS |
  			  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_2GS |
  			  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_2GS |
  			  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)
  {
  	u32 tc = 0U;
  	u32 buff_size = 0U;
  	unsigned int i_priority = 0U;
  	bool is_rx_flow_control = false;
  
  	/* 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, 0xFFF, 0U);
  	hw_atl_tps_tx_pkt_shed_tc_data_weight_set(self, 0x64, 0U);
  	hw_atl_tps_tx_pkt_shed_desc_tc_max_credit_set(self, 0x50, 0U);
  	hw_atl_tps_tx_pkt_shed_desc_tc_weight_set(self, 0x1E, 0U);
  
  	/* 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->flow_control);
  	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;
  	int err = 0;
  	unsigned int i = 0U;
  	unsigned int addr = 0U;
  	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)
  {
  	u8 *indirection_table =	rss_params->indirection_table;
  	u32 i = 0U;
  	u32 num_rss_queues = max(1U, self->aq_nic_cfg->num_rss_queues);
  	int err = 0;
  	u16 bitary[1 + (HW_ATL_A0_RSS_REDIRECTION_MAX *
  		   HW_ATL_A0_RSS_REDIRECTION_BITS / 16U)];
  	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, IS_CHIP_FEATURE(TPO2) ?
  			0x00010000U : 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, u8 *mac_addr)
  {
  	int err = 0;
  	unsigned int h = 0U;
  	unsigned int l = 0U;
  
  	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, u8 *mac_addr)
  {
  	static u32 aq_hw_atl_igcr_table_[4][2] = {
  		[AQ_HW_IRQ_INVALID] = { 0x20000000U, 0x20000000U },
  		[AQ_HW_IRQ_LEGACY]  = { 0x20000080U, 0x20000080U },
  		[AQ_HW_IRQ_MSI]     = { 0x20000021U, 0x20000025U },
  		[AQ_HW_IRQ_MSIX]    = { 0x20000022U, 0x20000026U },
  	};
  
  	int err = 0;
  
  	struct aq_nic_cfg_s *aq_nic_cfg = self->aq_nic_cfg;
  
  	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 pkt_len = 0U;
  	unsigned int frag_count = 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) {
  			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_lsw = (u32)aq_ring->dx_ring_pa;
  	u32 dma_desc_addr_msw = (u32)(((u64)aq_ring->dx_ring_pa) >> 32);
  
  	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_CFG_RX_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_lsw_addr = (u32)aq_ring->dx_ring_pa;
  	u32 dma_desc_msw_addr = (u32)(((u64)aq_ring->dx_ring_pa) >> 32);
  
  	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)
  {
  	int err = 0;
  	unsigned int hw_head = hw_atl_tdm_tx_desc_head_ptr_get(self, ring->idx);
  
  	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 %
  					AQ_CFG_RX_FRAME_MAX;
  				buff->len = buff->len ?
  					buff->len : AQ_CFG_RX_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)
  {
  	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));
  
  	self->aq_nic_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,
  					   (self->aq_nic_cfg->is_mc_list_enabled &&
  					   (i <= self->aq_nic_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)
  {
  	int err = 0;
  
  	if (count > (HW_ATL_A0_MAC_MAX - HW_ATL_A0_MAC_MIN)) {
  		err = EBADRQC;
  		goto err_exit;
  	}
  	for (self->aq_nic_cfg->mc_list_count = 0U;
  			self->aq_nic_cfg->mc_list_count < count;
  			++self->aq_nic_cfg->mc_list_count) {
  		u32 i = self->aq_nic_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,
  					   (self->aq_nic_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);
  }
  
  const struct aq_hw_ops hw_atl_ops_a0 = {
  	.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_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,
  };
  