Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

[J-linux.git] / drivers / net / ethernet / mediatek / airoha_eth.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2024 AIROHA Inc
 * Author: Lorenzo Bianconi <[email protected]>
 */
#include <linux/etherdevice.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/tcp.h>
#include <linux/u64_stats_sync.h>
#include <net/dsa.h>
#include <net/page_pool/helpers.h>
#include <uapi/linux/ppp_defs.h>

#define AIROHA_MAX_NUM_GDM_PORTS        1
#define AIROHA_MAX_NUM_QDMA             2
#define AIROHA_MAX_NUM_RSTS             3
#define AIROHA_MAX_NUM_XSI_RSTS         5
#define AIROHA_MAX_MTU                  2000
#define AIROHA_MAX_PACKET_SIZE          2048
#define AIROHA_NUM_TX_RING              32
#define AIROHA_NUM_RX_RING              32
#define AIROHA_FE_MC_MAX_VLAN_TABLE     64
#define AIROHA_FE_MC_MAX_VLAN_PORT      16
#define AIROHA_NUM_TX_IRQ               2
#define HW_DSCP_NUM                     2048
#define IRQ_QUEUE_LEN(_n)               ((_n) ? 1024 : 2048)
#define TX_DSCP_NUM                     1024
#define RX_DSCP_NUM(_n)                 \
        ((_n) ==  2 ? 128 :             \
         (_n) == 11 ? 128 :             \
         (_n) == 15 ? 128 :             \
         (_n) ==  0 ? 1024 : 16)

#define PSE_RSV_PAGES                   128
#define PSE_QUEUE_RSV_PAGES             64

/* FE */
#define PSE_BASE                        0x0100
#define CSR_IFC_BASE                    0x0200
#define CDM1_BASE                       0x0400
#define GDM1_BASE                       0x0500
#define PPE1_BASE                       0x0c00

#define CDM2_BASE                       0x1400
#define GDM2_BASE                       0x1500

#define GDM3_BASE                       0x1100
#define GDM4_BASE                       0x2500

#define GDM_BASE(_n)                    \
        ((_n) == 4 ? GDM4_BASE :        \
         (_n) == 3 ? GDM3_BASE :        \
         (_n) == 2 ? GDM2_BASE : GDM1_BASE)

#define REG_FE_DMA_GLO_CFG              0x0000
#define FE_DMA_GLO_L2_SPACE_MASK        GENMASK(7, 4)
#define FE_DMA_GLO_PG_SZ_MASK           BIT(3)

#define REG_FE_RST_GLO_CFG              0x0004
#define FE_RST_GDM4_MBI_ARB_MASK        BIT(3)
#define FE_RST_GDM3_MBI_ARB_MASK        BIT(2)
#define FE_RST_CORE_MASK                BIT(0)

#define REG_FE_WAN_MAC_H                0x0030
#define REG_FE_LAN_MAC_H                0x0040

#define REG_FE_MAC_LMIN(_n)             ((_n) + 0x04)
#define REG_FE_MAC_LMAX(_n)             ((_n) + 0x08)

#define REG_FE_CDM1_OQ_MAP0             0x0050
#define REG_FE_CDM1_OQ_MAP1             0x0054
#define REG_FE_CDM1_OQ_MAP2             0x0058
#define REG_FE_CDM1_OQ_MAP3             0x005c

#define REG_FE_PCE_CFG                  0x0070
#define PCE_DPI_EN_MASK                 BIT(2)
#define PCE_KA_EN_MASK                  BIT(1)
#define PCE_MC_EN_MASK                  BIT(0)

#define REG_FE_PSE_QUEUE_CFG_WR         0x0080
#define PSE_CFG_PORT_ID_MASK            GENMASK(27, 24)
#define PSE_CFG_QUEUE_ID_MASK           GENMASK(20, 16)
#define PSE_CFG_WR_EN_MASK              BIT(8)
#define PSE_CFG_OQRSV_SEL_MASK          BIT(0)

#define REG_FE_PSE_QUEUE_CFG_VAL        0x0084
#define PSE_CFG_OQ_RSV_MASK             GENMASK(13, 0)

#define PSE_FQ_CFG                      0x008c
#define PSE_FQ_LIMIT_MASK               GENMASK(14, 0)

#define REG_FE_PSE_BUF_SET              0x0090
#define PSE_SHARE_USED_LTHD_MASK        GENMASK(31, 16)
#define PSE_ALLRSV_MASK                 GENMASK(14, 0)

#define REG_PSE_SHARE_USED_THD          0x0094
#define PSE_SHARE_USED_MTHD_MASK        GENMASK(31, 16)
#define PSE_SHARE_USED_HTHD_MASK        GENMASK(15, 0)

#define REG_GDM_MISC_CFG                0x0148
#define GDM2_RDM_ACK_WAIT_PREF_MASK     BIT(9)
#define GDM2_CHN_VLD_MODE_MASK          BIT(5)

#define REG_FE_CSR_IFC_CFG              CSR_IFC_BASE
#define FE_IFC_EN_MASK                  BIT(0)

#define REG_FE_VIP_PORT_EN              0x01f0
#define REG_FE_IFC_PORT_EN              0x01f4

#define REG_PSE_IQ_REV1                 (PSE_BASE + 0x08)
#define PSE_IQ_RES1_P2_MASK             GENMASK(23, 16)

#define REG_PSE_IQ_REV2                 (PSE_BASE + 0x0c)
#define PSE_IQ_RES2_P5_MASK             GENMASK(15, 8)
#define PSE_IQ_RES2_P4_MASK             GENMASK(7, 0)

#define REG_FE_VIP_EN(_n)               (0x0300 + ((_n) << 3))
#define PATN_FCPU_EN_MASK               BIT(7)
#define PATN_SWP_EN_MASK                BIT(6)
#define PATN_DP_EN_MASK                 BIT(5)
#define PATN_SP_EN_MASK                 BIT(4)
#define PATN_TYPE_MASK                  GENMASK(3, 1)
#define PATN_EN_MASK                    BIT(0)

#define REG_FE_VIP_PATN(_n)             (0x0304 + ((_n) << 3))
#define PATN_DP_MASK                    GENMASK(31, 16)
#define PATN_SP_MASK                    GENMASK(15, 0)

#define REG_CDM1_VLAN_CTRL              CDM1_BASE
#define CDM1_VLAN_MASK                  GENMASK(31, 16)

#define REG_CDM1_FWD_CFG                (CDM1_BASE + 0x08)
#define CDM1_VIP_QSEL_MASK              GENMASK(24, 20)

#define REG_CDM1_CRSN_QSEL(_n)          (CDM1_BASE + 0x10 + ((_n) << 2))
#define CDM1_CRSN_QSEL_REASON_MASK(_n)  \
        GENMASK(4 + (((_n) % 4) << 3),  (((_n) % 4) << 3))

#define REG_CDM2_FWD_CFG                (CDM2_BASE + 0x08)
#define CDM2_OAM_QSEL_MASK              GENMASK(31, 27)
#define CDM2_VIP_QSEL_MASK              GENMASK(24, 20)

#define REG_CDM2_CRSN_QSEL(_n)          (CDM2_BASE + 0x10 + ((_n) << 2))
#define CDM2_CRSN_QSEL_REASON_MASK(_n)  \
        GENMASK(4 + (((_n) % 4) << 3),  (((_n) % 4) << 3))

#define REG_GDM_FWD_CFG(_n)             GDM_BASE(_n)
#define GDM_DROP_CRC_ERR                BIT(23)
#define GDM_IP4_CKSUM                   BIT(22)
#define GDM_TCP_CKSUM                   BIT(21)
#define GDM_UDP_CKSUM                   BIT(20)
#define GDM_UCFQ_MASK                   GENMASK(15, 12)
#define GDM_BCFQ_MASK                   GENMASK(11, 8)
#define GDM_MCFQ_MASK                   GENMASK(7, 4)
#define GDM_OCFQ_MASK                   GENMASK(3, 0)

#define REG_GDM_INGRESS_CFG(_n)         (GDM_BASE(_n) + 0x10)
#define GDM_INGRESS_FC_EN_MASK          BIT(1)
#define GDM_STAG_EN_MASK                BIT(0)

#define REG_GDM_LEN_CFG(_n)             (GDM_BASE(_n) + 0x14)
#define GDM_SHORT_LEN_MASK              GENMASK(13, 0)
#define GDM_LONG_LEN_MASK               GENMASK(29, 16)

#define REG_FE_CPORT_CFG                (GDM1_BASE + 0x40)
#define FE_CPORT_PAD                    BIT(26)
#define FE_CPORT_PORT_XFC_MASK          BIT(25)
#define FE_CPORT_QUEUE_XFC_MASK         BIT(24)

#define REG_FE_GDM_MIB_CLEAR(_n)        (GDM_BASE(_n) + 0xf0)
#define FE_GDM_MIB_RX_CLEAR_MASK        BIT(1)
#define FE_GDM_MIB_TX_CLEAR_MASK        BIT(0)

#define REG_FE_GDM1_MIB_CFG             (GDM1_BASE + 0xf4)
#define FE_STRICT_RFC2819_MODE_MASK     BIT(31)
#define FE_GDM1_TX_MIB_SPLIT_EN_MASK    BIT(17)
#define FE_GDM1_RX_MIB_SPLIT_EN_MASK    BIT(16)
#define FE_TX_MIB_ID_MASK               GENMASK(15, 8)
#define FE_RX_MIB_ID_MASK               GENMASK(7, 0)

#define REG_FE_GDM_TX_OK_PKT_CNT_L(_n)          (GDM_BASE(_n) + 0x104)
#define REG_FE_GDM_TX_OK_BYTE_CNT_L(_n)         (GDM_BASE(_n) + 0x10c)
#define REG_FE_GDM_TX_ETH_PKT_CNT_L(_n)         (GDM_BASE(_n) + 0x110)
#define REG_FE_GDM_TX_ETH_BYTE_CNT_L(_n)        (GDM_BASE(_n) + 0x114)
#define REG_FE_GDM_TX_ETH_DROP_CNT(_n)          (GDM_BASE(_n) + 0x118)
#define REG_FE_GDM_TX_ETH_BC_CNT(_n)            (GDM_BASE(_n) + 0x11c)
#define REG_FE_GDM_TX_ETH_MC_CNT(_n)            (GDM_BASE(_n) + 0x120)
#define REG_FE_GDM_TX_ETH_RUNT_CNT(_n)          (GDM_BASE(_n) + 0x124)
#define REG_FE_GDM_TX_ETH_LONG_CNT(_n)          (GDM_BASE(_n) + 0x128)
#define REG_FE_GDM_TX_ETH_E64_CNT_L(_n)         (GDM_BASE(_n) + 0x12c)
#define REG_FE_GDM_TX_ETH_L64_CNT_L(_n)         (GDM_BASE(_n) + 0x130)
#define REG_FE_GDM_TX_ETH_L127_CNT_L(_n)        (GDM_BASE(_n) + 0x134)
#define REG_FE_GDM_TX_ETH_L255_CNT_L(_n)        (GDM_BASE(_n) + 0x138)
#define REG_FE_GDM_TX_ETH_L511_CNT_L(_n)        (GDM_BASE(_n) + 0x13c)
#define REG_FE_GDM_TX_ETH_L1023_CNT_L(_n)       (GDM_BASE(_n) + 0x140)

#define REG_FE_GDM_RX_OK_PKT_CNT_L(_n)          (GDM_BASE(_n) + 0x148)
#define REG_FE_GDM_RX_FC_DROP_CNT(_n)           (GDM_BASE(_n) + 0x14c)
#define REG_FE_GDM_RX_RC_DROP_CNT(_n)           (GDM_BASE(_n) + 0x150)
#define REG_FE_GDM_RX_OVERFLOW_DROP_CNT(_n)     (GDM_BASE(_n) + 0x154)
#define REG_FE_GDM_RX_ERROR_DROP_CNT(_n)        (GDM_BASE(_n) + 0x158)
#define REG_FE_GDM_RX_OK_BYTE_CNT_L(_n)         (GDM_BASE(_n) + 0x15c)
#define REG_FE_GDM_RX_ETH_PKT_CNT_L(_n)         (GDM_BASE(_n) + 0x160)
#define REG_FE_GDM_RX_ETH_BYTE_CNT_L(_n)        (GDM_BASE(_n) + 0x164)
#define REG_FE_GDM_RX_ETH_DROP_CNT(_n)          (GDM_BASE(_n) + 0x168)
#define REG_FE_GDM_RX_ETH_BC_CNT(_n)            (GDM_BASE(_n) + 0x16c)
#define REG_FE_GDM_RX_ETH_MC_CNT(_n)            (GDM_BASE(_n) + 0x170)
#define REG_FE_GDM_RX_ETH_CRC_ERR_CNT(_n)       (GDM_BASE(_n) + 0x174)
#define REG_FE_GDM_RX_ETH_FRAG_CNT(_n)          (GDM_BASE(_n) + 0x178)
#define REG_FE_GDM_RX_ETH_JABBER_CNT(_n)        (GDM_BASE(_n) + 0x17c)
#define REG_FE_GDM_RX_ETH_RUNT_CNT(_n)          (GDM_BASE(_n) + 0x180)
#define REG_FE_GDM_RX_ETH_LONG_CNT(_n)          (GDM_BASE(_n) + 0x184)
#define REG_FE_GDM_RX_ETH_E64_CNT_L(_n)         (GDM_BASE(_n) + 0x188)
#define REG_FE_GDM_RX_ETH_L64_CNT_L(_n)         (GDM_BASE(_n) + 0x18c)
#define REG_FE_GDM_RX_ETH_L127_CNT_L(_n)        (GDM_BASE(_n) + 0x190)
#define REG_FE_GDM_RX_ETH_L255_CNT_L(_n)        (GDM_BASE(_n) + 0x194)
#define REG_FE_GDM_RX_ETH_L511_CNT_L(_n)        (GDM_BASE(_n) + 0x198)
#define REG_FE_GDM_RX_ETH_L1023_CNT_L(_n)       (GDM_BASE(_n) + 0x19c)

#define REG_PPE1_TB_HASH_CFG            (PPE1_BASE + 0x250)
#define PPE1_SRAM_TABLE_EN_MASK         BIT(0)
#define PPE1_SRAM_HASH1_EN_MASK         BIT(8)
#define PPE1_DRAM_TABLE_EN_MASK         BIT(16)
#define PPE1_DRAM_HASH1_EN_MASK         BIT(24)

#define REG_FE_GDM_TX_OK_PKT_CNT_H(_n)          (GDM_BASE(_n) + 0x280)
#define REG_FE_GDM_TX_OK_BYTE_CNT_H(_n)         (GDM_BASE(_n) + 0x284)
#define REG_FE_GDM_TX_ETH_PKT_CNT_H(_n)         (GDM_BASE(_n) + 0x288)
#define REG_FE_GDM_TX_ETH_BYTE_CNT_H(_n)        (GDM_BASE(_n) + 0x28c)

#define REG_FE_GDM_RX_OK_PKT_CNT_H(_n)          (GDM_BASE(_n) + 0x290)
#define REG_FE_GDM_RX_OK_BYTE_CNT_H(_n)         (GDM_BASE(_n) + 0x294)
#define REG_FE_GDM_RX_ETH_PKT_CNT_H(_n)         (GDM_BASE(_n) + 0x298)
#define REG_FE_GDM_RX_ETH_BYTE_CNT_H(_n)        (GDM_BASE(_n) + 0x29c)
#define REG_FE_GDM_TX_ETH_E64_CNT_H(_n)         (GDM_BASE(_n) + 0x2b8)
#define REG_FE_GDM_TX_ETH_L64_CNT_H(_n)         (GDM_BASE(_n) + 0x2bc)
#define REG_FE_GDM_TX_ETH_L127_CNT_H(_n)        (GDM_BASE(_n) + 0x2c0)
#define REG_FE_GDM_TX_ETH_L255_CNT_H(_n)        (GDM_BASE(_n) + 0x2c4)
#define REG_FE_GDM_TX_ETH_L511_CNT_H(_n)        (GDM_BASE(_n) + 0x2c8)
#define REG_FE_GDM_TX_ETH_L1023_CNT_H(_n)       (GDM_BASE(_n) + 0x2cc)
#define REG_FE_GDM_RX_ETH_E64_CNT_H(_n)         (GDM_BASE(_n) + 0x2e8)
#define REG_FE_GDM_RX_ETH_L64_CNT_H(_n)         (GDM_BASE(_n) + 0x2ec)
#define REG_FE_GDM_RX_ETH_L127_CNT_H(_n)        (GDM_BASE(_n) + 0x2f0)
#define REG_FE_GDM_RX_ETH_L255_CNT_H(_n)        (GDM_BASE(_n) + 0x2f4)
#define REG_FE_GDM_RX_ETH_L511_CNT_H(_n)        (GDM_BASE(_n) + 0x2f8)
#define REG_FE_GDM_RX_ETH_L1023_CNT_H(_n)       (GDM_BASE(_n) + 0x2fc)

#define REG_GDM2_CHN_RLS                (GDM2_BASE + 0x20)
#define MBI_RX_AGE_SEL_MASK             GENMASK(26, 25)
#define MBI_TX_AGE_SEL_MASK             GENMASK(18, 17)

#define REG_GDM3_FWD_CFG                GDM3_BASE
#define GDM3_PAD_EN_MASK                BIT(28)

#define REG_GDM4_FWD_CFG                (GDM4_BASE + 0x100)
#define GDM4_PAD_EN_MASK                BIT(28)
#define GDM4_SPORT_OFFSET0_MASK         GENMASK(11, 8)

#define REG_GDM4_SRC_PORT_SET           (GDM4_BASE + 0x33c)
#define GDM4_SPORT_OFF2_MASK            GENMASK(19, 16)
#define GDM4_SPORT_OFF1_MASK            GENMASK(15, 12)
#define GDM4_SPORT_OFF0_MASK            GENMASK(11, 8)

#define REG_IP_FRAG_FP                  0x2010
#define IP_ASSEMBLE_PORT_MASK           GENMASK(24, 21)
#define IP_ASSEMBLE_NBQ_MASK            GENMASK(20, 16)
#define IP_FRAGMENT_PORT_MASK           GENMASK(8, 5)
#define IP_FRAGMENT_NBQ_MASK            GENMASK(4, 0)

#define REG_MC_VLAN_EN                  0x2100
#define MC_VLAN_EN_MASK                 BIT(0)

#define REG_MC_VLAN_CFG                 0x2104
#define MC_VLAN_CFG_CMD_DONE_MASK       BIT(31)
#define MC_VLAN_CFG_TABLE_ID_MASK       GENMASK(21, 16)
#define MC_VLAN_CFG_PORT_ID_MASK        GENMASK(11, 8)
#define MC_VLAN_CFG_TABLE_SEL_MASK      BIT(4)
#define MC_VLAN_CFG_RW_MASK             BIT(0)

#define REG_MC_VLAN_DATA                0x2108

#define REG_CDM5_RX_OQ1_DROP_CNT        0x29d4

/* QDMA */
#define REG_QDMA_GLOBAL_CFG                     0x0004
#define GLOBAL_CFG_RX_2B_OFFSET_MASK            BIT(31)
#define GLOBAL_CFG_DMA_PREFERENCE_MASK          GENMASK(30, 29)
#define GLOBAL_CFG_CPU_TXR_RR_MASK              BIT(28)
#define GLOBAL_CFG_DSCP_BYTE_SWAP_MASK          BIT(27)
#define GLOBAL_CFG_PAYLOAD_BYTE_SWAP_MASK       BIT(26)
#define GLOBAL_CFG_MULTICAST_MODIFY_FP_MASK     BIT(25)
#define GLOBAL_CFG_OAM_MODIFY_MASK              BIT(24)
#define GLOBAL_CFG_RESET_MASK                   BIT(23)
#define GLOBAL_CFG_RESET_DONE_MASK              BIT(22)
#define GLOBAL_CFG_MULTICAST_EN_MASK            BIT(21)
#define GLOBAL_CFG_IRQ1_EN_MASK                 BIT(20)
#define GLOBAL_CFG_IRQ0_EN_MASK                 BIT(19)
#define GLOBAL_CFG_LOOPCNT_EN_MASK              BIT(18)
#define GLOBAL_CFG_RD_BYPASS_WR_MASK            BIT(17)
#define GLOBAL_CFG_QDMA_LOOPBACK_MASK           BIT(16)
#define GLOBAL_CFG_LPBK_RXQ_SEL_MASK            GENMASK(13, 8)
#define GLOBAL_CFG_CHECK_DONE_MASK              BIT(7)
#define GLOBAL_CFG_TX_WB_DONE_MASK              BIT(6)
#define GLOBAL_CFG_MAX_ISSUE_NUM_MASK           GENMASK(5, 4)
#define GLOBAL_CFG_RX_DMA_BUSY_MASK             BIT(3)
#define GLOBAL_CFG_RX_DMA_EN_MASK               BIT(2)
#define GLOBAL_CFG_TX_DMA_BUSY_MASK             BIT(1)
#define GLOBAL_CFG_TX_DMA_EN_MASK               BIT(0)

#define REG_FWD_DSCP_BASE                       0x0010
#define REG_FWD_BUF_BASE                        0x0014

#define REG_HW_FWD_DSCP_CFG                     0x0018
#define HW_FWD_DSCP_PAYLOAD_SIZE_MASK           GENMASK(29, 28)
#define HW_FWD_DSCP_SCATTER_LEN_MASK            GENMASK(17, 16)
#define HW_FWD_DSCP_MIN_SCATTER_LEN_MASK        GENMASK(15, 0)

#define REG_INT_STATUS(_n)              \
        (((_n) == 4) ? 0x0730 :         \
         ((_n) == 3) ? 0x0724 :         \
         ((_n) == 2) ? 0x0720 :         \
         ((_n) == 1) ? 0x0024 : 0x0020)

#define REG_INT_ENABLE(_n)              \
        (((_n) == 4) ? 0x0750 :         \
         ((_n) == 3) ? 0x0744 :         \
         ((_n) == 2) ? 0x0740 :         \
         ((_n) == 1) ? 0x002c : 0x0028)

/* QDMA_CSR_INT_ENABLE1 */
#define RX15_COHERENT_INT_MASK          BIT(31)
#define RX14_COHERENT_INT_MASK          BIT(30)
#define RX13_COHERENT_INT_MASK          BIT(29)
#define RX12_COHERENT_INT_MASK          BIT(28)
#define RX11_COHERENT_INT_MASK          BIT(27)
#define RX10_COHERENT_INT_MASK          BIT(26)
#define RX9_COHERENT_INT_MASK           BIT(25)
#define RX8_COHERENT_INT_MASK           BIT(24)
#define RX7_COHERENT_INT_MASK           BIT(23)
#define RX6_COHERENT_INT_MASK           BIT(22)
#define RX5_COHERENT_INT_MASK           BIT(21)
#define RX4_COHERENT_INT_MASK           BIT(20)
#define RX3_COHERENT_INT_MASK           BIT(19)
#define RX2_COHERENT_INT_MASK           BIT(18)
#define RX1_COHERENT_INT_MASK           BIT(17)
#define RX0_COHERENT_INT_MASK           BIT(16)
#define TX7_COHERENT_INT_MASK           BIT(15)
#define TX6_COHERENT_INT_MASK           BIT(14)
#define TX5_COHERENT_INT_MASK           BIT(13)
#define TX4_COHERENT_INT_MASK           BIT(12)
#define TX3_COHERENT_INT_MASK           BIT(11)
#define TX2_COHERENT_INT_MASK           BIT(10)
#define TX1_COHERENT_INT_MASK           BIT(9)
#define TX0_COHERENT_INT_MASK           BIT(8)
#define CNT_OVER_FLOW_INT_MASK          BIT(7)
#define IRQ1_FULL_INT_MASK              BIT(5)
#define IRQ1_INT_MASK                   BIT(4)
#define HWFWD_DSCP_LOW_INT_MASK         BIT(3)
#define HWFWD_DSCP_EMPTY_INT_MASK       BIT(2)
#define IRQ0_FULL_INT_MASK              BIT(1)
#define IRQ0_INT_MASK                   BIT(0)

#define TX_DONE_INT_MASK(_n)                                    \
        ((_n) ? IRQ1_INT_MASK | IRQ1_FULL_INT_MASK              \
              : IRQ0_INT_MASK | IRQ0_FULL_INT_MASK)

#define INT_TX_MASK                                             \
        (IRQ1_INT_MASK | IRQ1_FULL_INT_MASK |                   \
         IRQ0_INT_MASK | IRQ0_FULL_INT_MASK)

#define INT_IDX0_MASK                                           \
        (TX0_COHERENT_INT_MASK | TX1_COHERENT_INT_MASK |        \
         TX2_COHERENT_INT_MASK | TX3_COHERENT_INT_MASK |        \
         TX4_COHERENT_INT_MASK | TX5_COHERENT_INT_MASK |        \
         TX6_COHERENT_INT_MASK | TX7_COHERENT_INT_MASK |        \
         RX0_COHERENT_INT_MASK | RX1_COHERENT_INT_MASK |        \
         RX2_COHERENT_INT_MASK | RX3_COHERENT_INT_MASK |        \
         RX4_COHERENT_INT_MASK | RX7_COHERENT_INT_MASK |        \
         RX8_COHERENT_INT_MASK | RX9_COHERENT_INT_MASK |        \
         RX15_COHERENT_INT_MASK | INT_TX_MASK)

/* QDMA_CSR_INT_ENABLE2 */
#define RX15_NO_CPU_DSCP_INT_MASK       BIT(31)
#define RX14_NO_CPU_DSCP_INT_MASK       BIT(30)
#define RX13_NO_CPU_DSCP_INT_MASK       BIT(29)
#define RX12_NO_CPU_DSCP_INT_MASK       BIT(28)
#define RX11_NO_CPU_DSCP_INT_MASK       BIT(27)
#define RX10_NO_CPU_DSCP_INT_MASK       BIT(26)
#define RX9_NO_CPU_DSCP_INT_MASK        BIT(25)
#define RX8_NO_CPU_DSCP_INT_MASK        BIT(24)
#define RX7_NO_CPU_DSCP_INT_MASK        BIT(23)
#define RX6_NO_CPU_DSCP_INT_MASK        BIT(22)
#define RX5_NO_CPU_DSCP_INT_MASK        BIT(21)
#define RX4_NO_CPU_DSCP_INT_MASK        BIT(20)
#define RX3_NO_CPU_DSCP_INT_MASK        BIT(19)
#define RX2_NO_CPU_DSCP_INT_MASK        BIT(18)
#define RX1_NO_CPU_DSCP_INT_MASK        BIT(17)
#define RX0_NO_CPU_DSCP_INT_MASK        BIT(16)
#define RX15_DONE_INT_MASK              BIT(15)
#define RX14_DONE_INT_MASK              BIT(14)
#define RX13_DONE_INT_MASK              BIT(13)
#define RX12_DONE_INT_MASK              BIT(12)
#define RX11_DONE_INT_MASK              BIT(11)
#define RX10_DONE_INT_MASK              BIT(10)
#define RX9_DONE_INT_MASK               BIT(9)
#define RX8_DONE_INT_MASK               BIT(8)
#define RX7_DONE_INT_MASK               BIT(7)
#define RX6_DONE_INT_MASK               BIT(6)
#define RX5_DONE_INT_MASK               BIT(5)
#define RX4_DONE_INT_MASK               BIT(4)
#define RX3_DONE_INT_MASK               BIT(3)
#define RX2_DONE_INT_MASK               BIT(2)
#define RX1_DONE_INT_MASK               BIT(1)
#define RX0_DONE_INT_MASK               BIT(0)

#define RX_DONE_INT_MASK                                        \
        (RX0_DONE_INT_MASK | RX1_DONE_INT_MASK |                \
         RX2_DONE_INT_MASK | RX3_DONE_INT_MASK |                \
         RX4_DONE_INT_MASK | RX7_DONE_INT_MASK |                \
         RX8_DONE_INT_MASK | RX9_DONE_INT_MASK |                \
         RX15_DONE_INT_MASK)
#define INT_IDX1_MASK                                           \
        (RX_DONE_INT_MASK |                                     \
         RX0_NO_CPU_DSCP_INT_MASK | RX1_NO_CPU_DSCP_INT_MASK |  \
         RX2_NO_CPU_DSCP_INT_MASK | RX3_NO_CPU_DSCP_INT_MASK |  \
         RX4_NO_CPU_DSCP_INT_MASK | RX7_NO_CPU_DSCP_INT_MASK |  \
         RX8_NO_CPU_DSCP_INT_MASK | RX9_NO_CPU_DSCP_INT_MASK |  \
         RX15_NO_CPU_DSCP_INT_MASK)

/* QDMA_CSR_INT_ENABLE5 */
#define TX31_COHERENT_INT_MASK          BIT(31)
#define TX30_COHERENT_INT_MASK          BIT(30)
#define TX29_COHERENT_INT_MASK          BIT(29)
#define TX28_COHERENT_INT_MASK          BIT(28)
#define TX27_COHERENT_INT_MASK          BIT(27)
#define TX26_COHERENT_INT_MASK          BIT(26)
#define TX25_COHERENT_INT_MASK          BIT(25)
#define TX24_COHERENT_INT_MASK          BIT(24)
#define TX23_COHERENT_INT_MASK          BIT(23)
#define TX22_COHERENT_INT_MASK          BIT(22)
#define TX21_COHERENT_INT_MASK          BIT(21)
#define TX20_COHERENT_INT_MASK          BIT(20)
#define TX19_COHERENT_INT_MASK          BIT(19)
#define TX18_COHERENT_INT_MASK          BIT(18)
#define TX17_COHERENT_INT_MASK          BIT(17)
#define TX16_COHERENT_INT_MASK          BIT(16)
#define TX15_COHERENT_INT_MASK          BIT(15)
#define TX14_COHERENT_INT_MASK          BIT(14)
#define TX13_COHERENT_INT_MASK          BIT(13)
#define TX12_COHERENT_INT_MASK          BIT(12)
#define TX11_COHERENT_INT_MASK          BIT(11)
#define TX10_COHERENT_INT_MASK          BIT(10)
#define TX9_COHERENT_INT_MASK           BIT(9)
#define TX8_COHERENT_INT_MASK           BIT(8)

#define INT_IDX4_MASK                                           \
        (TX8_COHERENT_INT_MASK | TX9_COHERENT_INT_MASK |        \
         TX10_COHERENT_INT_MASK | TX11_COHERENT_INT_MASK |      \
         TX12_COHERENT_INT_MASK | TX13_COHERENT_INT_MASK |      \
         TX14_COHERENT_INT_MASK | TX15_COHERENT_INT_MASK |      \
         TX16_COHERENT_INT_MASK | TX17_COHERENT_INT_MASK |      \
         TX18_COHERENT_INT_MASK | TX19_COHERENT_INT_MASK |      \
         TX20_COHERENT_INT_MASK | TX21_COHERENT_INT_MASK |      \
         TX22_COHERENT_INT_MASK | TX23_COHERENT_INT_MASK |      \
         TX24_COHERENT_INT_MASK | TX25_COHERENT_INT_MASK |      \
         TX26_COHERENT_INT_MASK | TX27_COHERENT_INT_MASK |      \
         TX28_COHERENT_INT_MASK | TX29_COHERENT_INT_MASK |      \
         TX30_COHERENT_INT_MASK | TX31_COHERENT_INT_MASK)

#define REG_TX_IRQ_BASE(_n)             ((_n) ? 0x0048 : 0x0050)

#define REG_TX_IRQ_CFG(_n)              ((_n) ? 0x004c : 0x0054)
#define TX_IRQ_THR_MASK                 GENMASK(27, 16)
#define TX_IRQ_DEPTH_MASK               GENMASK(11, 0)

#define REG_IRQ_CLEAR_LEN(_n)           ((_n) ? 0x0064 : 0x0058)
#define IRQ_CLEAR_LEN_MASK              GENMASK(7, 0)

#define REG_IRQ_STATUS(_n)              ((_n) ? 0x0068 : 0x005c)
#define IRQ_ENTRY_LEN_MASK              GENMASK(27, 16)
#define IRQ_HEAD_IDX_MASK               GENMASK(11, 0)

#define REG_TX_RING_BASE(_n)    \
        (((_n) < 8) ? 0x0100 + ((_n) << 5) : 0x0b00 + (((_n) - 8) << 5))

#define REG_TX_RING_BLOCKING(_n)        \
        (((_n) < 8) ? 0x0104 + ((_n) << 5) : 0x0b04 + (((_n) - 8) << 5))

#define TX_RING_IRQ_BLOCKING_MAP_MASK                   BIT(6)
#define TX_RING_IRQ_BLOCKING_CFG_MASK                   BIT(4)
#define TX_RING_IRQ_BLOCKING_TX_DROP_EN_MASK            BIT(2)
#define TX_RING_IRQ_BLOCKING_MAX_TH_TXRING_EN_MASK      BIT(1)
#define TX_RING_IRQ_BLOCKING_MIN_TH_TXRING_EN_MASK      BIT(0)

#define REG_TX_CPU_IDX(_n)      \
        (((_n) < 8) ? 0x0108 + ((_n) << 5) : 0x0b08 + (((_n) - 8) << 5))

#define TX_RING_CPU_IDX_MASK            GENMASK(15, 0)

#define REG_TX_DMA_IDX(_n)      \
        (((_n) < 8) ? 0x010c + ((_n) << 5) : 0x0b0c + (((_n) - 8) << 5))

#define TX_RING_DMA_IDX_MASK            GENMASK(15, 0)

#define IRQ_RING_IDX_MASK               GENMASK(20, 16)
#define IRQ_DESC_IDX_MASK               GENMASK(15, 0)

#define REG_RX_RING_BASE(_n)    \
        (((_n) < 16) ? 0x0200 + ((_n) << 5) : 0x0e00 + (((_n) - 16) << 5))

#define REG_RX_RING_SIZE(_n)    \
        (((_n) < 16) ? 0x0204 + ((_n) << 5) : 0x0e04 + (((_n) - 16) << 5))

#define RX_RING_THR_MASK                GENMASK(31, 16)
#define RX_RING_SIZE_MASK               GENMASK(15, 0)

#define REG_RX_CPU_IDX(_n)      \
        (((_n) < 16) ? 0x0208 + ((_n) << 5) : 0x0e08 + (((_n) - 16) << 5))

#define RX_RING_CPU_IDX_MASK            GENMASK(15, 0)

#define REG_RX_DMA_IDX(_n)      \
        (((_n) < 16) ? 0x020c + ((_n) << 5) : 0x0e0c + (((_n) - 16) << 5))

#define REG_RX_DELAY_INT_IDX(_n)        \
        (((_n) < 16) ? 0x0210 + ((_n) << 5) : 0x0e10 + (((_n) - 16) << 5))

#define RX_DELAY_INT_MASK               GENMASK(15, 0)

#define RX_RING_DMA_IDX_MASK            GENMASK(15, 0)

#define REG_INGRESS_TRTCM_CFG           0x0070
#define INGRESS_TRTCM_EN_MASK           BIT(31)
#define INGRESS_TRTCM_MODE_MASK         BIT(30)
#define INGRESS_SLOW_TICK_RATIO_MASK    GENMASK(29, 16)
#define INGRESS_FAST_TICK_MASK          GENMASK(15, 0)

#define REG_TXQ_DIS_CFG_BASE(_n)        ((_n) ? 0x20a0 : 0x00a0)
#define REG_TXQ_DIS_CFG(_n, _m)         (REG_TXQ_DIS_CFG_BASE((_n)) + (_m) << 2)

#define REG_LMGR_INIT_CFG               0x1000
#define LMGR_INIT_START                 BIT(31)
#define LMGR_SRAM_MODE_MASK             BIT(30)
#define HW_FWD_PKTSIZE_OVERHEAD_MASK    GENMASK(27, 20)
#define HW_FWD_DESC_NUM_MASK            GENMASK(16, 0)

#define REG_FWD_DSCP_LOW_THR            0x1004
#define FWD_DSCP_LOW_THR_MASK           GENMASK(17, 0)

#define REG_EGRESS_RATE_METER_CFG               0x100c
#define EGRESS_RATE_METER_EN_MASK               BIT(31)
#define EGRESS_RATE_METER_EQ_RATE_EN_MASK       BIT(17)
#define EGRESS_RATE_METER_WINDOW_SZ_MASK        GENMASK(16, 12)
#define EGRESS_RATE_METER_TIMESLICE_MASK        GENMASK(10, 0)

#define REG_EGRESS_TRTCM_CFG            0x1010
#define EGRESS_TRTCM_EN_MASK            BIT(31)
#define EGRESS_TRTCM_MODE_MASK          BIT(30)
#define EGRESS_SLOW_TICK_RATIO_MASK     GENMASK(29, 16)
#define EGRESS_FAST_TICK_MASK           GENMASK(15, 0)

#define REG_TXWRR_MODE_CFG              0x1020
#define TWRR_WEIGHT_SCALE_MASK          BIT(31)
#define TWRR_WEIGHT_BASE_MASK           BIT(3)

#define REG_PSE_BUF_USAGE_CFG           0x1028
#define PSE_BUF_ESTIMATE_EN_MASK        BIT(29)

#define REG_GLB_TRTCM_CFG               0x1080
#define GLB_TRTCM_EN_MASK               BIT(31)
#define GLB_TRTCM_MODE_MASK             BIT(30)
#define GLB_SLOW_TICK_RATIO_MASK        GENMASK(29, 16)
#define GLB_FAST_TICK_MASK              GENMASK(15, 0)

#define REG_TXQ_CNGST_CFG               0x10a0
#define TXQ_CNGST_DROP_EN               BIT(31)
#define TXQ_CNGST_DEI_DROP_EN           BIT(30)

#define REG_SLA_TRTCM_CFG               0x1150
#define SLA_TRTCM_EN_MASK               BIT(31)
#define SLA_TRTCM_MODE_MASK             BIT(30)
#define SLA_SLOW_TICK_RATIO_MASK        GENMASK(29, 16)
#define SLA_FAST_TICK_MASK              GENMASK(15, 0)

/* CTRL */
#define QDMA_DESC_DONE_MASK             BIT(31)
#define QDMA_DESC_DROP_MASK             BIT(30) /* tx: drop - rx: overflow */
#define QDMA_DESC_MORE_MASK             BIT(29) /* more SG elements */
#define QDMA_DESC_DEI_MASK              BIT(25)
#define QDMA_DESC_NO_DROP_MASK          BIT(24)
#define QDMA_DESC_LEN_MASK              GENMASK(15, 0)
/* DATA */
#define QDMA_DESC_NEXT_ID_MASK          GENMASK(15, 0)
/* TX MSG0 */
#define QDMA_ETH_TXMSG_MIC_IDX_MASK     BIT(30)
#define QDMA_ETH_TXMSG_SP_TAG_MASK      GENMASK(29, 14)
#define QDMA_ETH_TXMSG_ICO_MASK         BIT(13)
#define QDMA_ETH_TXMSG_UCO_MASK         BIT(12)
#define QDMA_ETH_TXMSG_TCO_MASK         BIT(11)
#define QDMA_ETH_TXMSG_TSO_MASK         BIT(10)
#define QDMA_ETH_TXMSG_FAST_MASK        BIT(9)
#define QDMA_ETH_TXMSG_OAM_MASK         BIT(8)
#define QDMA_ETH_TXMSG_CHAN_MASK        GENMASK(7, 3)
#define QDMA_ETH_TXMSG_QUEUE_MASK       GENMASK(2, 0)
/* TX MSG1 */
#define QDMA_ETH_TXMSG_NO_DROP          BIT(31)
#define QDMA_ETH_TXMSG_METER_MASK       GENMASK(30, 24) /* 0x7f no meters */
#define QDMA_ETH_TXMSG_FPORT_MASK       GENMASK(23, 20)
#define QDMA_ETH_TXMSG_NBOQ_MASK        GENMASK(19, 15)
#define QDMA_ETH_TXMSG_HWF_MASK         BIT(14)
#define QDMA_ETH_TXMSG_HOP_MASK         BIT(13)
#define QDMA_ETH_TXMSG_PTP_MASK         BIT(12)
#define QDMA_ETH_TXMSG_ACNT_G1_MASK     GENMASK(10, 6)  /* 0x1f do not count */
#define QDMA_ETH_TXMSG_ACNT_G0_MASK     GENMASK(5, 0)   /* 0x3f do not count */

/* RX MSG1 */
#define QDMA_ETH_RXMSG_DEI_MASK         BIT(31)
#define QDMA_ETH_RXMSG_IP6_MASK         BIT(30)
#define QDMA_ETH_RXMSG_IP4_MASK         BIT(29)
#define QDMA_ETH_RXMSG_IP4F_MASK        BIT(28)
#define QDMA_ETH_RXMSG_L4_VALID_MASK    BIT(27)
#define QDMA_ETH_RXMSG_L4F_MASK         BIT(26)
#define QDMA_ETH_RXMSG_SPORT_MASK       GENMASK(25, 21)
#define QDMA_ETH_RXMSG_CRSN_MASK        GENMASK(20, 16)
#define QDMA_ETH_RXMSG_PPE_ENTRY_MASK   GENMASK(15, 0)

struct airoha_qdma_desc {
        __le32 rsv;
        __le32 ctrl;
        __le32 addr;
        __le32 data;
        __le32 msg0;
        __le32 msg1;
        __le32 msg2;
        __le32 msg3;
};

/* CTRL0 */
#define QDMA_FWD_DESC_CTX_MASK          BIT(31)
#define QDMA_FWD_DESC_RING_MASK         GENMASK(30, 28)
#define QDMA_FWD_DESC_IDX_MASK          GENMASK(27, 16)
#define QDMA_FWD_DESC_LEN_MASK          GENMASK(15, 0)
/* CTRL1 */
#define QDMA_FWD_DESC_FIRST_IDX_MASK    GENMASK(15, 0)
/* CTRL2 */
#define QDMA_FWD_DESC_MORE_PKT_NUM_MASK GENMASK(2, 0)

struct airoha_qdma_fwd_desc {
        __le32 addr;
        __le32 ctrl0;
        __le32 ctrl1;
        __le32 ctrl2;
        __le32 msg0;
        __le32 msg1;
        __le32 rsv0;
        __le32 rsv1;
};

enum {
        QDMA_INT_REG_IDX0,
        QDMA_INT_REG_IDX1,
        QDMA_INT_REG_IDX2,
        QDMA_INT_REG_IDX3,
        QDMA_INT_REG_IDX4,
        QDMA_INT_REG_MAX
};

enum {
        XSI_PCIE0_PORT,
        XSI_PCIE1_PORT,
        XSI_USB_PORT,
        XSI_AE_PORT,
        XSI_ETH_PORT,
};

enum {
        XSI_PCIE0_VIP_PORT_MASK = BIT(22),
        XSI_PCIE1_VIP_PORT_MASK = BIT(23),
        XSI_USB_VIP_PORT_MASK   = BIT(25),
        XSI_ETH_VIP_PORT_MASK   = BIT(24),
};

enum {
        DEV_STATE_INITIALIZED,
};

enum {
        CDM_CRSN_QSEL_Q1 = 1,
        CDM_CRSN_QSEL_Q5 = 5,
        CDM_CRSN_QSEL_Q6 = 6,
        CDM_CRSN_QSEL_Q15 = 15,
};

enum {
        CRSN_08 = 0x8,
        CRSN_21 = 0x15, /* KA */
        CRSN_22 = 0x16, /* hit bind and force route to CPU */
        CRSN_24 = 0x18,
        CRSN_25 = 0x19,
};

enum {
        FE_PSE_PORT_CDM1,
        FE_PSE_PORT_GDM1,
        FE_PSE_PORT_GDM2,
        FE_PSE_PORT_GDM3,
        FE_PSE_PORT_PPE1,
        FE_PSE_PORT_CDM2,
        FE_PSE_PORT_CDM3,
        FE_PSE_PORT_CDM4,
        FE_PSE_PORT_PPE2,
        FE_PSE_PORT_GDM4,
        FE_PSE_PORT_CDM5,
        FE_PSE_PORT_DROP = 0xf,
};

struct airoha_queue_entry {
        union {
                void *buf;
                struct sk_buff *skb;
        };
        dma_addr_t dma_addr;
        u16 dma_len;
};

struct airoha_queue {
        struct airoha_qdma *qdma;

        /* protect concurrent queue accesses */
        spinlock_t lock;
        struct airoha_queue_entry *entry;
        struct airoha_qdma_desc *desc;
        u16 head;
        u16 tail;

        int queued;
        int ndesc;
        int free_thr;
        int buf_size;

        struct napi_struct napi;
        struct page_pool *page_pool;
};

struct airoha_tx_irq_queue {
        struct airoha_qdma *qdma;

        struct napi_struct napi;

        int size;
        u32 *q;
};

struct airoha_hw_stats {
        /* protect concurrent hw_stats accesses */
        spinlock_t lock;
        struct u64_stats_sync syncp;

        /* get_stats64 */
        u64 rx_ok_pkts;
        u64 tx_ok_pkts;
        u64 rx_ok_bytes;
        u64 tx_ok_bytes;
        u64 rx_multicast;
        u64 rx_errors;
        u64 rx_drops;
        u64 tx_drops;
        u64 rx_crc_error;
        u64 rx_over_errors;
        /* ethtool stats */
        u64 tx_broadcast;
        u64 tx_multicast;
        u64 tx_len[7];
        u64 rx_broadcast;
        u64 rx_fragment;
        u64 rx_jabber;
        u64 rx_len[7];
};

struct airoha_qdma {
        struct airoha_eth *eth;
        void __iomem *regs;

        /* protect concurrent irqmask accesses */
        spinlock_t irq_lock;
        u32 irqmask[QDMA_INT_REG_MAX];
        int irq;

        struct airoha_tx_irq_queue q_tx_irq[AIROHA_NUM_TX_IRQ];

        struct airoha_queue q_tx[AIROHA_NUM_TX_RING];
        struct airoha_queue q_rx[AIROHA_NUM_RX_RING];

        /* descriptor and packet buffers for qdma hw forward */
        struct {
                void *desc;
                void *q;
        } hfwd;
};

struct airoha_gdm_port {
        struct airoha_qdma *qdma;
        struct net_device *dev;
        int id;

        struct airoha_hw_stats stats;
};

struct airoha_eth {
        struct device *dev;

        unsigned long state;
        void __iomem *fe_regs;

        struct reset_control_bulk_data rsts[AIROHA_MAX_NUM_RSTS];
        struct reset_control_bulk_data xsi_rsts[AIROHA_MAX_NUM_XSI_RSTS];

        struct net_device *napi_dev;

        struct airoha_qdma qdma[AIROHA_MAX_NUM_QDMA];
        struct airoha_gdm_port *ports[AIROHA_MAX_NUM_GDM_PORTS];
};

static u32 airoha_rr(void __iomem *base, u32 offset)
{
        return readl(base + offset);
}

static void airoha_wr(void __iomem *base, u32 offset, u32 val)
{
        writel(val, base + offset);
}

static u32 airoha_rmw(void __iomem *base, u32 offset, u32 mask, u32 val)
{
        val |= (airoha_rr(base, offset) & ~mask);
        airoha_wr(base, offset, val);

        return val;
}

#define airoha_fe_rr(eth, offset)                               \
        airoha_rr((eth)->fe_regs, (offset))
#define airoha_fe_wr(eth, offset, val)                          \
        airoha_wr((eth)->fe_regs, (offset), (val))
#define airoha_fe_rmw(eth, offset, mask, val)                   \
        airoha_rmw((eth)->fe_regs, (offset), (mask), (val))
#define airoha_fe_set(eth, offset, val)                         \
        airoha_rmw((eth)->fe_regs, (offset), 0, (val))
#define airoha_fe_clear(eth, offset, val)                       \
        airoha_rmw((eth)->fe_regs, (offset), (val), 0)

#define airoha_qdma_rr(qdma, offset)                            \
        airoha_rr((qdma)->regs, (offset))
#define airoha_qdma_wr(qdma, offset, val)                       \
        airoha_wr((qdma)->regs, (offset), (val))
#define airoha_qdma_rmw(qdma, offset, mask, val)                \
        airoha_rmw((qdma)->regs, (offset), (mask), (val))
#define airoha_qdma_set(qdma, offset, val)                      \
        airoha_rmw((qdma)->regs, (offset), 0, (val))
#define airoha_qdma_clear(qdma, offset, val)                    \
        airoha_rmw((qdma)->regs, (offset), (val), 0)

static void airoha_qdma_set_irqmask(struct airoha_qdma *qdma, int index,
                                    u32 clear, u32 set)
{
        unsigned long flags;

        if (WARN_ON_ONCE(index >= ARRAY_SIZE(qdma->irqmask)))
                return;

        spin_lock_irqsave(&qdma->irq_lock, flags);

        qdma->irqmask[index] &= ~clear;
        qdma->irqmask[index] |= set;
        airoha_qdma_wr(qdma, REG_INT_ENABLE(index), qdma->irqmask[index]);
        /* Read irq_enable register in order to guarantee the update above
         * completes in the spinlock critical section.
         */
        airoha_qdma_rr(qdma, REG_INT_ENABLE(index));

        spin_unlock_irqrestore(&qdma->irq_lock, flags);
}

static void airoha_qdma_irq_enable(struct airoha_qdma *qdma, int index,
                                   u32 mask)
{
        airoha_qdma_set_irqmask(qdma, index, 0, mask);
}

static void airoha_qdma_irq_disable(struct airoha_qdma *qdma, int index,
                                    u32 mask)
{
        airoha_qdma_set_irqmask(qdma, index, mask, 0);
}

static bool airhoa_is_lan_gdm_port(struct airoha_gdm_port *port)
{
        /* GDM1 port on EN7581 SoC is connected to the lan dsa switch.
         * GDM{2,3,4} can be used as wan port connected to an external
         * phy module.
         */
        return port->id == 1;
}

static void airoha_set_macaddr(struct airoha_gdm_port *port, const u8 *addr)
{
        struct airoha_eth *eth = port->qdma->eth;
        u32 val, reg;

        reg = airhoa_is_lan_gdm_port(port) ? REG_FE_LAN_MAC_H
                                           : REG_FE_WAN_MAC_H;
        val = (addr[0] << 16) | (addr[1] << 8) | addr[2];
        airoha_fe_wr(eth, reg, val);

        val = (addr[3] << 16) | (addr[4] << 8) | addr[5];
        airoha_fe_wr(eth, REG_FE_MAC_LMIN(reg), val);
        airoha_fe_wr(eth, REG_FE_MAC_LMAX(reg), val);
}

static void airoha_set_gdm_port_fwd_cfg(struct airoha_eth *eth, u32 addr,
                                        u32 val)
{
        airoha_fe_rmw(eth, addr, GDM_OCFQ_MASK,
                      FIELD_PREP(GDM_OCFQ_MASK, val));
        airoha_fe_rmw(eth, addr, GDM_MCFQ_MASK,
                      FIELD_PREP(GDM_MCFQ_MASK, val));
        airoha_fe_rmw(eth, addr, GDM_BCFQ_MASK,
                      FIELD_PREP(GDM_BCFQ_MASK, val));
        airoha_fe_rmw(eth, addr, GDM_UCFQ_MASK,
                      FIELD_PREP(GDM_UCFQ_MASK, val));
}

static int airoha_set_gdm_port(struct airoha_eth *eth, int port, bool enable)
{
        u32 val = enable ? FE_PSE_PORT_PPE1 : FE_PSE_PORT_DROP;
        u32 vip_port, cfg_addr;

        switch (port) {
        case XSI_PCIE0_PORT:
                vip_port = XSI_PCIE0_VIP_PORT_MASK;
                cfg_addr = REG_GDM_FWD_CFG(3);
                break;
        case XSI_PCIE1_PORT:
                vip_port = XSI_PCIE1_VIP_PORT_MASK;
                cfg_addr = REG_GDM_FWD_CFG(3);
                break;
        case XSI_USB_PORT:
                vip_port = XSI_USB_VIP_PORT_MASK;
                cfg_addr = REG_GDM_FWD_CFG(4);
                break;
        case XSI_ETH_PORT:
                vip_port = XSI_ETH_VIP_PORT_MASK;
                cfg_addr = REG_GDM_FWD_CFG(4);
                break;
        default:
                return -EINVAL;
        }

        if (enable) {
                airoha_fe_set(eth, REG_FE_VIP_PORT_EN, vip_port);
                airoha_fe_set(eth, REG_FE_IFC_PORT_EN, vip_port);
        } else {
                airoha_fe_clear(eth, REG_FE_VIP_PORT_EN, vip_port);
                airoha_fe_clear(eth, REG_FE_IFC_PORT_EN, vip_port);
        }

        airoha_set_gdm_port_fwd_cfg(eth, cfg_addr, val);

        return 0;
}

static int airoha_set_gdm_ports(struct airoha_eth *eth, bool enable)
{
        const int port_list[] = {
                XSI_PCIE0_PORT,
                XSI_PCIE1_PORT,
                XSI_USB_PORT,
                XSI_ETH_PORT
        };
        int i, err;

        for (i = 0; i < ARRAY_SIZE(port_list); i++) {
                err = airoha_set_gdm_port(eth, port_list[i], enable);
                if (err)
                        goto error;
        }

        return 0;

error:
        for (i--; i >= 0; i--)
                airoha_set_gdm_port(eth, port_list[i], false);

        return err;
}

static void airoha_fe_maccr_init(struct airoha_eth *eth)
{
        int p;

        for (p = 1; p <= ARRAY_SIZE(eth->ports); p++) {
                airoha_fe_set(eth, REG_GDM_FWD_CFG(p),
                              GDM_TCP_CKSUM | GDM_UDP_CKSUM | GDM_IP4_CKSUM |
                              GDM_DROP_CRC_ERR);
                airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(p),
                                            FE_PSE_PORT_CDM1);
                airoha_fe_rmw(eth, REG_GDM_LEN_CFG(p),
                              GDM_SHORT_LEN_MASK | GDM_LONG_LEN_MASK,
                              FIELD_PREP(GDM_SHORT_LEN_MASK, 60) |
                              FIELD_PREP(GDM_LONG_LEN_MASK, 4004));
        }

        airoha_fe_rmw(eth, REG_CDM1_VLAN_CTRL, CDM1_VLAN_MASK,
                      FIELD_PREP(CDM1_VLAN_MASK, 0x8100));

        airoha_fe_set(eth, REG_FE_CPORT_CFG, FE_CPORT_PAD);
}

static void airoha_fe_vip_setup(struct airoha_eth *eth)
{
        airoha_fe_wr(eth, REG_FE_VIP_PATN(3), ETH_P_PPP_DISC);
        airoha_fe_wr(eth, REG_FE_VIP_EN(3), PATN_FCPU_EN_MASK | PATN_EN_MASK);

        airoha_fe_wr(eth, REG_FE_VIP_PATN(4), PPP_LCP);
        airoha_fe_wr(eth, REG_FE_VIP_EN(4),
                     PATN_FCPU_EN_MASK | FIELD_PREP(PATN_TYPE_MASK, 1) |
                     PATN_EN_MASK);

        airoha_fe_wr(eth, REG_FE_VIP_PATN(6), PPP_IPCP);
        airoha_fe_wr(eth, REG_FE_VIP_EN(6),
                     PATN_FCPU_EN_MASK | FIELD_PREP(PATN_TYPE_MASK, 1) |
                     PATN_EN_MASK);

        airoha_fe_wr(eth, REG_FE_VIP_PATN(7), PPP_CHAP);
        airoha_fe_wr(eth, REG_FE_VIP_EN(7),
                     PATN_FCPU_EN_MASK | FIELD_PREP(PATN_TYPE_MASK, 1) |
                     PATN_EN_MASK);

        /* BOOTP (0x43) */
        airoha_fe_wr(eth, REG_FE_VIP_PATN(8), 0x43);
        airoha_fe_wr(eth, REG_FE_VIP_EN(8),
                     PATN_FCPU_EN_MASK | PATN_SP_EN_MASK |
                     FIELD_PREP(PATN_TYPE_MASK, 4) | PATN_EN_MASK);

        /* BOOTP (0x44) */
        airoha_fe_wr(eth, REG_FE_VIP_PATN(9), 0x44);
        airoha_fe_wr(eth, REG_FE_VIP_EN(9),
                     PATN_FCPU_EN_MASK | PATN_SP_EN_MASK |
                     FIELD_PREP(PATN_TYPE_MASK, 4) | PATN_EN_MASK);

        /* ISAKMP */
        airoha_fe_wr(eth, REG_FE_VIP_PATN(10), 0x1f401f4);
        airoha_fe_wr(eth, REG_FE_VIP_EN(10),
                     PATN_FCPU_EN_MASK | PATN_DP_EN_MASK | PATN_SP_EN_MASK |
                     FIELD_PREP(PATN_TYPE_MASK, 4) | PATN_EN_MASK);

        airoha_fe_wr(eth, REG_FE_VIP_PATN(11), PPP_IPV6CP);
        airoha_fe_wr(eth, REG_FE_VIP_EN(11),
                     PATN_FCPU_EN_MASK | FIELD_PREP(PATN_TYPE_MASK, 1) |
                     PATN_EN_MASK);

        /* DHCPv6 */
        airoha_fe_wr(eth, REG_FE_VIP_PATN(12), 0x2220223);
        airoha_fe_wr(eth, REG_FE_VIP_EN(12),
                     PATN_FCPU_EN_MASK | PATN_DP_EN_MASK | PATN_SP_EN_MASK |
                     FIELD_PREP(PATN_TYPE_MASK, 4) | PATN_EN_MASK);

        airoha_fe_wr(eth, REG_FE_VIP_PATN(19), PPP_PAP);
        airoha_fe_wr(eth, REG_FE_VIP_EN(19),
                     PATN_FCPU_EN_MASK | FIELD_PREP(PATN_TYPE_MASK, 1) |
                     PATN_EN_MASK);

        /* ETH->ETH_P_1905 (0x893a) */
        airoha_fe_wr(eth, REG_FE_VIP_PATN(20), 0x893a);
        airoha_fe_wr(eth, REG_FE_VIP_EN(20),
                     PATN_FCPU_EN_MASK | PATN_EN_MASK);

        airoha_fe_wr(eth, REG_FE_VIP_PATN(21), ETH_P_LLDP);
        airoha_fe_wr(eth, REG_FE_VIP_EN(21),
                     PATN_FCPU_EN_MASK | PATN_EN_MASK);
}

static u32 airoha_fe_get_pse_queue_rsv_pages(struct airoha_eth *eth,
                                             u32 port, u32 queue)
{
        u32 val;

        airoha_fe_rmw(eth, REG_FE_PSE_QUEUE_CFG_WR,
                      PSE_CFG_PORT_ID_MASK | PSE_CFG_QUEUE_ID_MASK,
                      FIELD_PREP(PSE_CFG_PORT_ID_MASK, port) |
                      FIELD_PREP(PSE_CFG_QUEUE_ID_MASK, queue));
        val = airoha_fe_rr(eth, REG_FE_PSE_QUEUE_CFG_VAL);

        return FIELD_GET(PSE_CFG_OQ_RSV_MASK, val);
}

static void airoha_fe_set_pse_queue_rsv_pages(struct airoha_eth *eth,
                                              u32 port, u32 queue, u32 val)
{
        airoha_fe_rmw(eth, REG_FE_PSE_QUEUE_CFG_VAL, PSE_CFG_OQ_RSV_MASK,
                      FIELD_PREP(PSE_CFG_OQ_RSV_MASK, val));
        airoha_fe_rmw(eth, REG_FE_PSE_QUEUE_CFG_WR,
                      PSE_CFG_PORT_ID_MASK | PSE_CFG_QUEUE_ID_MASK |
                      PSE_CFG_WR_EN_MASK | PSE_CFG_OQRSV_SEL_MASK,
                      FIELD_PREP(PSE_CFG_PORT_ID_MASK, port) |
                      FIELD_PREP(PSE_CFG_QUEUE_ID_MASK, queue) |
                      PSE_CFG_WR_EN_MASK | PSE_CFG_OQRSV_SEL_MASK);
}

static u32 airoha_fe_get_pse_all_rsv(struct airoha_eth *eth)
{
        u32 val = airoha_fe_rr(eth, REG_FE_PSE_BUF_SET);

        return FIELD_GET(PSE_ALLRSV_MASK, val);
}

static int airoha_fe_set_pse_oq_rsv(struct airoha_eth *eth,
                                    u32 port, u32 queue, u32 val)
{
        u32 orig_val = airoha_fe_get_pse_queue_rsv_pages(eth, port, queue);
        u32 tmp, all_rsv, fq_limit;

        airoha_fe_set_pse_queue_rsv_pages(eth, port, queue, val);

        /* modify all rsv */
        all_rsv = airoha_fe_get_pse_all_rsv(eth);
        all_rsv += (val - orig_val);
        airoha_fe_rmw(eth, REG_FE_PSE_BUF_SET, PSE_ALLRSV_MASK,
                      FIELD_PREP(PSE_ALLRSV_MASK, all_rsv));

        /* modify hthd */
        tmp = airoha_fe_rr(eth, PSE_FQ_CFG);
        fq_limit = FIELD_GET(PSE_FQ_LIMIT_MASK, tmp);
        tmp = fq_limit - all_rsv - 0x20;
        airoha_fe_rmw(eth, REG_PSE_SHARE_USED_THD,
                      PSE_SHARE_USED_HTHD_MASK,
                      FIELD_PREP(PSE_SHARE_USED_HTHD_MASK, tmp));

        tmp = fq_limit - all_rsv - 0x100;
        airoha_fe_rmw(eth, REG_PSE_SHARE_USED_THD,
                      PSE_SHARE_USED_MTHD_MASK,
                      FIELD_PREP(PSE_SHARE_USED_MTHD_MASK, tmp));
        tmp = (3 * tmp) >> 2;
        airoha_fe_rmw(eth, REG_FE_PSE_BUF_SET,
                      PSE_SHARE_USED_LTHD_MASK,
                      FIELD_PREP(PSE_SHARE_USED_LTHD_MASK, tmp));

        return 0;
}

static void airoha_fe_pse_ports_init(struct airoha_eth *eth)
{
        const u32 pse_port_num_queues[] = {
                [FE_PSE_PORT_CDM1] = 6,
                [FE_PSE_PORT_GDM1] = 6,
                [FE_PSE_PORT_GDM2] = 32,
                [FE_PSE_PORT_GDM3] = 6,
                [FE_PSE_PORT_PPE1] = 4,
                [FE_PSE_PORT_CDM2] = 6,
                [FE_PSE_PORT_CDM3] = 8,
                [FE_PSE_PORT_CDM4] = 10,
                [FE_PSE_PORT_PPE2] = 4,
                [FE_PSE_PORT_GDM4] = 2,
                [FE_PSE_PORT_CDM5] = 2,
        };
        u32 all_rsv;
        int q;

        all_rsv = airoha_fe_get_pse_all_rsv(eth);
        /* hw misses PPE2 oq rsv */
        all_rsv += PSE_RSV_PAGES * pse_port_num_queues[FE_PSE_PORT_PPE2];
        airoha_fe_set(eth, REG_FE_PSE_BUF_SET, all_rsv);

        /* CMD1 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_CDM1]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_CDM1, q,
                                         PSE_QUEUE_RSV_PAGES);
        /* GMD1 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_GDM1]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_GDM1, q,
                                         PSE_QUEUE_RSV_PAGES);
        /* GMD2 */
        for (q = 6; q < pse_port_num_queues[FE_PSE_PORT_GDM2]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_GDM2, q, 0);
        /* GMD3 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_GDM3]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_GDM3, q,
                                         PSE_QUEUE_RSV_PAGES);
        /* PPE1 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_PPE1]; q++) {
                if (q < pse_port_num_queues[FE_PSE_PORT_PPE1])
                        airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_PPE1, q,
                                                 PSE_QUEUE_RSV_PAGES);
                else
                        airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_PPE1, q, 0);
        }
        /* CDM2 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_CDM2]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_CDM2, q,
                                         PSE_QUEUE_RSV_PAGES);
        /* CDM3 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_CDM3] - 1; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_CDM3, q, 0);
        /* CDM4 */
        for (q = 4; q < pse_port_num_queues[FE_PSE_PORT_CDM4]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_CDM4, q,
                                         PSE_QUEUE_RSV_PAGES);
        /* PPE2 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_PPE2]; q++) {
                if (q < pse_port_num_queues[FE_PSE_PORT_PPE2] / 2)
                        airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_PPE2, q,
                                                 PSE_QUEUE_RSV_PAGES);
                else
                        airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_PPE2, q, 0);
        }
        /* GMD4 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_GDM4]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_GDM4, q,
                                         PSE_QUEUE_RSV_PAGES);
        /* CDM5 */
        for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_CDM5]; q++)
                airoha_fe_set_pse_oq_rsv(eth, FE_PSE_PORT_CDM5, q,
                                         PSE_QUEUE_RSV_PAGES);
}

static int airoha_fe_mc_vlan_clear(struct airoha_eth *eth)
{
        int i;

        for (i = 0; i < AIROHA_FE_MC_MAX_VLAN_TABLE; i++) {
                int err, j;
                u32 val;

                airoha_fe_wr(eth, REG_MC_VLAN_DATA, 0x0);

                val = FIELD_PREP(MC_VLAN_CFG_TABLE_ID_MASK, i) |
                      MC_VLAN_CFG_TABLE_SEL_MASK | MC_VLAN_CFG_RW_MASK;
                airoha_fe_wr(eth, REG_MC_VLAN_CFG, val);
                err = read_poll_timeout(airoha_fe_rr, val,
                                        val & MC_VLAN_CFG_CMD_DONE_MASK,
                                        USEC_PER_MSEC, 5 * USEC_PER_MSEC,
                                        false, eth, REG_MC_VLAN_CFG);
                if (err)
                        return err;

                for (j = 0; j < AIROHA_FE_MC_MAX_VLAN_PORT; j++) {
                        airoha_fe_wr(eth, REG_MC_VLAN_DATA, 0x0);

                        val = FIELD_PREP(MC_VLAN_CFG_TABLE_ID_MASK, i) |
                              FIELD_PREP(MC_VLAN_CFG_PORT_ID_MASK, j) |
                              MC_VLAN_CFG_RW_MASK;
                        airoha_fe_wr(eth, REG_MC_VLAN_CFG, val);
                        err = read_poll_timeout(airoha_fe_rr, val,
                                                val & MC_VLAN_CFG_CMD_DONE_MASK,
                                                USEC_PER_MSEC,
                                                5 * USEC_PER_MSEC, false, eth,
                                                REG_MC_VLAN_CFG);
                        if (err)
                                return err;
                }
        }

        return 0;
}

static void airoha_fe_crsn_qsel_init(struct airoha_eth *eth)
{
        /* CDM1_CRSN_QSEL */
        airoha_fe_rmw(eth, REG_CDM1_CRSN_QSEL(CRSN_22 >> 2),
                      CDM1_CRSN_QSEL_REASON_MASK(CRSN_22),
                      FIELD_PREP(CDM1_CRSN_QSEL_REASON_MASK(CRSN_22),
                                 CDM_CRSN_QSEL_Q1));
        airoha_fe_rmw(eth, REG_CDM1_CRSN_QSEL(CRSN_08 >> 2),
                      CDM1_CRSN_QSEL_REASON_MASK(CRSN_08),
                      FIELD_PREP(CDM1_CRSN_QSEL_REASON_MASK(CRSN_08),
                                 CDM_CRSN_QSEL_Q1));
        airoha_fe_rmw(eth, REG_CDM1_CRSN_QSEL(CRSN_21 >> 2),
                      CDM1_CRSN_QSEL_REASON_MASK(CRSN_21),
                      FIELD_PREP(CDM1_CRSN_QSEL_REASON_MASK(CRSN_21),
                                 CDM_CRSN_QSEL_Q1));
        airoha_fe_rmw(eth, REG_CDM1_CRSN_QSEL(CRSN_24 >> 2),
                      CDM1_CRSN_QSEL_REASON_MASK(CRSN_24),
                      FIELD_PREP(CDM1_CRSN_QSEL_REASON_MASK(CRSN_24),
                                 CDM_CRSN_QSEL_Q6));
        airoha_fe_rmw(eth, REG_CDM1_CRSN_QSEL(CRSN_25 >> 2),
                      CDM1_CRSN_QSEL_REASON_MASK(CRSN_25),
                      FIELD_PREP(CDM1_CRSN_QSEL_REASON_MASK(CRSN_25),
                                 CDM_CRSN_QSEL_Q1));
        /* CDM2_CRSN_QSEL */
        airoha_fe_rmw(eth, REG_CDM2_CRSN_QSEL(CRSN_08 >> 2),
                      CDM2_CRSN_QSEL_REASON_MASK(CRSN_08),
                      FIELD_PREP(CDM2_CRSN_QSEL_REASON_MASK(CRSN_08),
                                 CDM_CRSN_QSEL_Q1));
        airoha_fe_rmw(eth, REG_CDM2_CRSN_QSEL(CRSN_21 >> 2),
                      CDM2_CRSN_QSEL_REASON_MASK(CRSN_21),
                      FIELD_PREP(CDM2_CRSN_QSEL_REASON_MASK(CRSN_21),
                                 CDM_CRSN_QSEL_Q1));
        airoha_fe_rmw(eth, REG_CDM2_CRSN_QSEL(CRSN_22 >> 2),
                      CDM2_CRSN_QSEL_REASON_MASK(CRSN_22),
                      FIELD_PREP(CDM2_CRSN_QSEL_REASON_MASK(CRSN_22),
                                 CDM_CRSN_QSEL_Q1));
        airoha_fe_rmw(eth, REG_CDM2_CRSN_QSEL(CRSN_24 >> 2),
                      CDM2_CRSN_QSEL_REASON_MASK(CRSN_24),
                      FIELD_PREP(CDM2_CRSN_QSEL_REASON_MASK(CRSN_24),
                                 CDM_CRSN_QSEL_Q6));
        airoha_fe_rmw(eth, REG_CDM2_CRSN_QSEL(CRSN_25 >> 2),
                      CDM2_CRSN_QSEL_REASON_MASK(CRSN_25),
                      FIELD_PREP(CDM2_CRSN_QSEL_REASON_MASK(CRSN_25),
                                 CDM_CRSN_QSEL_Q1));
}

static int airoha_fe_init(struct airoha_eth *eth)
{
        airoha_fe_maccr_init(eth);

        /* PSE IQ reserve */
        airoha_fe_rmw(eth, REG_PSE_IQ_REV1, PSE_IQ_RES1_P2_MASK,
                      FIELD_PREP(PSE_IQ_RES1_P2_MASK, 0x10));
        airoha_fe_rmw(eth, REG_PSE_IQ_REV2,
                      PSE_IQ_RES2_P5_MASK | PSE_IQ_RES2_P4_MASK,
                      FIELD_PREP(PSE_IQ_RES2_P5_MASK, 0x40) |
                      FIELD_PREP(PSE_IQ_RES2_P4_MASK, 0x34));

        /* enable FE copy engine for MC/KA/DPI */
        airoha_fe_wr(eth, REG_FE_PCE_CFG,
                     PCE_DPI_EN_MASK | PCE_KA_EN_MASK | PCE_MC_EN_MASK);
        /* set vip queue selection to ring 1 */
        airoha_fe_rmw(eth, REG_CDM1_FWD_CFG, CDM1_VIP_QSEL_MASK,
                      FIELD_PREP(CDM1_VIP_QSEL_MASK, 0x4));
        airoha_fe_rmw(eth, REG_CDM2_FWD_CFG, CDM2_VIP_QSEL_MASK,
                      FIELD_PREP(CDM2_VIP_QSEL_MASK, 0x4));
        /* set GDM4 source interface offset to 8 */
        airoha_fe_rmw(eth, REG_GDM4_SRC_PORT_SET,
                      GDM4_SPORT_OFF2_MASK |
                      GDM4_SPORT_OFF1_MASK |
                      GDM4_SPORT_OFF0_MASK,
                      FIELD_PREP(GDM4_SPORT_OFF2_MASK, 8) |
                      FIELD_PREP(GDM4_SPORT_OFF1_MASK, 8) |
                      FIELD_PREP(GDM4_SPORT_OFF0_MASK, 8));

        /* set PSE Page as 128B */
        airoha_fe_rmw(eth, REG_FE_DMA_GLO_CFG,
                      FE_DMA_GLO_L2_SPACE_MASK | FE_DMA_GLO_PG_SZ_MASK,
                      FIELD_PREP(FE_DMA_GLO_L2_SPACE_MASK, 2) |
                      FE_DMA_GLO_PG_SZ_MASK);
        airoha_fe_wr(eth, REG_FE_RST_GLO_CFG,
                     FE_RST_CORE_MASK | FE_RST_GDM3_MBI_ARB_MASK |
                     FE_RST_GDM4_MBI_ARB_MASK);
        usleep_range(1000, 2000);

        /* connect RxRing1 and RxRing15 to PSE Port0 OQ-1
         * connect other rings to PSE Port0 OQ-0
         */
        airoha_fe_wr(eth, REG_FE_CDM1_OQ_MAP0, BIT(4));
        airoha_fe_wr(eth, REG_FE_CDM1_OQ_MAP1, BIT(28));
        airoha_fe_wr(eth, REG_FE_CDM1_OQ_MAP2, BIT(4));
        airoha_fe_wr(eth, REG_FE_CDM1_OQ_MAP3, BIT(28));

        airoha_fe_vip_setup(eth);
        airoha_fe_pse_ports_init(eth);

        airoha_fe_set(eth, REG_GDM_MISC_CFG,
                      GDM2_RDM_ACK_WAIT_PREF_MASK |
                      GDM2_CHN_VLD_MODE_MASK);
        airoha_fe_rmw(eth, REG_CDM2_FWD_CFG, CDM2_OAM_QSEL_MASK,
                      FIELD_PREP(CDM2_OAM_QSEL_MASK, 15));

        /* init fragment and assemble Force Port */
        /* NPU Core-3, NPU Bridge Channel-3 */
        airoha_fe_rmw(eth, REG_IP_FRAG_FP,
                      IP_FRAGMENT_PORT_MASK | IP_FRAGMENT_NBQ_MASK,
                      FIELD_PREP(IP_FRAGMENT_PORT_MASK, 6) |
                      FIELD_PREP(IP_FRAGMENT_NBQ_MASK, 3));
        /* QDMA LAN, RX Ring-22 */
        airoha_fe_rmw(eth, REG_IP_FRAG_FP,
                      IP_ASSEMBLE_PORT_MASK | IP_ASSEMBLE_NBQ_MASK,
                      FIELD_PREP(IP_ASSEMBLE_PORT_MASK, 0) |
                      FIELD_PREP(IP_ASSEMBLE_NBQ_MASK, 22));

        airoha_fe_set(eth, REG_GDM3_FWD_CFG, GDM3_PAD_EN_MASK);
        airoha_fe_set(eth, REG_GDM4_FWD_CFG, GDM4_PAD_EN_MASK);

        airoha_fe_crsn_qsel_init(eth);

        airoha_fe_clear(eth, REG_FE_CPORT_CFG, FE_CPORT_QUEUE_XFC_MASK);
        airoha_fe_set(eth, REG_FE_CPORT_CFG, FE_CPORT_PORT_XFC_MASK);

        /* default aging mode for mbi unlock issue */
        airoha_fe_rmw(eth, REG_GDM2_CHN_RLS,
                      MBI_RX_AGE_SEL_MASK | MBI_TX_AGE_SEL_MASK,
                      FIELD_PREP(MBI_RX_AGE_SEL_MASK, 3) |
                      FIELD_PREP(MBI_TX_AGE_SEL_MASK, 3));

        /* disable IFC by default */
        airoha_fe_clear(eth, REG_FE_CSR_IFC_CFG, FE_IFC_EN_MASK);

        /* enable 1:N vlan action, init vlan table */
        airoha_fe_set(eth, REG_MC_VLAN_EN, MC_VLAN_EN_MASK);

        return airoha_fe_mc_vlan_clear(eth);
}

static int airoha_qdma_fill_rx_queue(struct airoha_queue *q)
{
        enum dma_data_direction dir = page_pool_get_dma_dir(q->page_pool);
        struct airoha_qdma *qdma = q->qdma;
        struct airoha_eth *eth = qdma->eth;
        int qid = q - &qdma->q_rx[0];
        int nframes = 0;

        while (q->queued < q->ndesc - 1) {
                struct airoha_queue_entry *e = &q->entry[q->head];
                struct airoha_qdma_desc *desc = &q->desc[q->head];
                struct page *page;
                int offset;
                u32 val;

                page = page_pool_dev_alloc_frag(q->page_pool, &offset,
                                                q->buf_size);
                if (!page)
                        break;

                q->head = (q->head + 1) % q->ndesc;
                q->queued++;
                nframes++;

                e->buf = page_address(page) + offset;
                e->dma_addr = page_pool_get_dma_addr(page) + offset;
                e->dma_len = SKB_WITH_OVERHEAD(q->buf_size);

                dma_sync_single_for_device(eth->dev, e->dma_addr, e->dma_len,
                                           dir);

                val = FIELD_PREP(QDMA_DESC_LEN_MASK, e->dma_len);
                WRITE_ONCE(desc->ctrl, cpu_to_le32(val));
                WRITE_ONCE(desc->addr, cpu_to_le32(e->dma_addr));
                val = FIELD_PREP(QDMA_DESC_NEXT_ID_MASK, q->head);
                WRITE_ONCE(desc->data, cpu_to_le32(val));
                WRITE_ONCE(desc->msg0, 0);
                WRITE_ONCE(desc->msg1, 0);
                WRITE_ONCE(desc->msg2, 0);
                WRITE_ONCE(desc->msg3, 0);

                airoha_qdma_rmw(qdma, REG_RX_CPU_IDX(qid),
                                RX_RING_CPU_IDX_MASK,
                                FIELD_PREP(RX_RING_CPU_IDX_MASK, q->head));
        }

        return nframes;
}

static int airoha_qdma_get_gdm_port(struct airoha_eth *eth,
                                    struct airoha_qdma_desc *desc)
{
        u32 port, sport, msg1 = le32_to_cpu(desc->msg1);

        sport = FIELD_GET(QDMA_ETH_RXMSG_SPORT_MASK, msg1);
        switch (sport) {
        case 0x10 ... 0x13:
                port = 0;
                break;
        case 0x2 ... 0x4:
                port = sport - 1;
                break;
        default:
                return -EINVAL;
        }

        return port >= ARRAY_SIZE(eth->ports) ? -EINVAL : port;
}

static int airoha_qdma_rx_process(struct airoha_queue *q, int budget)
{
        enum dma_data_direction dir = page_pool_get_dma_dir(q->page_pool);
        struct airoha_qdma *qdma = q->qdma;
        struct airoha_eth *eth = qdma->eth;
        int qid = q - &qdma->q_rx[0];
        int done = 0;

        while (done < budget) {
                struct airoha_queue_entry *e = &q->entry[q->tail];
                struct airoha_qdma_desc *desc = &q->desc[q->tail];
                dma_addr_t dma_addr = le32_to_cpu(desc->addr);
                u32 desc_ctrl = le32_to_cpu(desc->ctrl);
                struct sk_buff *skb;
                int len, p;

                if (!(desc_ctrl & QDMA_DESC_DONE_MASK))
                        break;

                if (!dma_addr)
                        break;

                len = FIELD_GET(QDMA_DESC_LEN_MASK, desc_ctrl);
                if (!len)
                        break;

                q->tail = (q->tail + 1) % q->ndesc;
                q->queued--;

                dma_sync_single_for_cpu(eth->dev, dma_addr,
                                        SKB_WITH_OVERHEAD(q->buf_size), dir);

                p = airoha_qdma_get_gdm_port(eth, desc);
                if (p < 0 || !eth->ports[p]) {
                        page_pool_put_full_page(q->page_pool,
                                                virt_to_head_page(e->buf),
                                                true);
                        continue;
                }

                skb = napi_build_skb(e->buf, q->buf_size);
                if (!skb) {
                        page_pool_put_full_page(q->page_pool,
                                                virt_to_head_page(e->buf),
                                                true);
                        break;
                }

                skb_reserve(skb, 2);
                __skb_put(skb, len);
                skb_mark_for_recycle(skb);
                skb->dev = eth->ports[p]->dev;
                skb->protocol = eth_type_trans(skb, skb->dev);
                skb->ip_summed = CHECKSUM_UNNECESSARY;
                skb_record_rx_queue(skb, qid);
                napi_gro_receive(&q->napi, skb);

                done++;
        }
        airoha_qdma_fill_rx_queue(q);

        return done;
}

static int airoha_qdma_rx_napi_poll(struct napi_struct *napi, int budget)
{
        struct airoha_queue *q = container_of(napi, struct airoha_queue, napi);
        int cur, done = 0;

        do {
                cur = airoha_qdma_rx_process(q, budget - done);
                done += cur;
        } while (cur && done < budget);

        if (done < budget && napi_complete(napi))
                airoha_qdma_irq_enable(q->qdma, QDMA_INT_REG_IDX1,
                                       RX_DONE_INT_MASK);

        return done;
}

static int airoha_qdma_init_rx_queue(struct airoha_queue *q,
                                     struct airoha_qdma *qdma, int ndesc)
{
        const struct page_pool_params pp_params = {
                .order = 0,
                .pool_size = 256,
                .flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
                .dma_dir = DMA_FROM_DEVICE,
                .max_len = PAGE_SIZE,
                .nid = NUMA_NO_NODE,
                .dev = qdma->eth->dev,
                .napi = &q->napi,
        };
        struct airoha_eth *eth = qdma->eth;
        int qid = q - &qdma->q_rx[0], thr;
        dma_addr_t dma_addr;

        q->buf_size = PAGE_SIZE / 2;
        q->ndesc = ndesc;
        q->qdma = qdma;

        q->entry = devm_kzalloc(eth->dev, q->ndesc * sizeof(*q->entry),
                                GFP_KERNEL);
        if (!q->entry)
                return -ENOMEM;

        q->page_pool = page_pool_create(&pp_params);
        if (IS_ERR(q->page_pool)) {
                int err = PTR_ERR(q->page_pool);

                q->page_pool = NULL;
                return err;
        }

        q->desc = dmam_alloc_coherent(eth->dev, q->ndesc * sizeof(*q->desc),
                                      &dma_addr, GFP_KERNEL);
        if (!q->desc)
                return -ENOMEM;

        netif_napi_add(eth->napi_dev, &q->napi, airoha_qdma_rx_napi_poll);

        airoha_qdma_wr(qdma, REG_RX_RING_BASE(qid), dma_addr);
        airoha_qdma_rmw(qdma, REG_RX_RING_SIZE(qid),
                        RX_RING_SIZE_MASK,
                        FIELD_PREP(RX_RING_SIZE_MASK, ndesc));

        thr = clamp(ndesc >> 3, 1, 32);
        airoha_qdma_rmw(qdma, REG_RX_RING_SIZE(qid), RX_RING_THR_MASK,
                        FIELD_PREP(RX_RING_THR_MASK, thr));
        airoha_qdma_rmw(qdma, REG_RX_DMA_IDX(qid), RX_RING_DMA_IDX_MASK,
                        FIELD_PREP(RX_RING_DMA_IDX_MASK, q->head));

        airoha_qdma_fill_rx_queue(q);

        return 0;
}

static void airoha_qdma_cleanup_rx_queue(struct airoha_queue *q)
{
        struct airoha_eth *eth = q->qdma->eth;

        while (q->queued) {
                struct airoha_queue_entry *e = &q->entry[q->tail];
                struct page *page = virt_to_head_page(e->buf);

                dma_sync_single_for_cpu(eth->dev, e->dma_addr, e->dma_len,
                                        page_pool_get_dma_dir(q->page_pool));
                page_pool_put_full_page(q->page_pool, page, false);
                q->tail = (q->tail + 1) % q->ndesc;
                q->queued--;
        }
}

static int airoha_qdma_init_rx(struct airoha_qdma *qdma)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
                int err;

                if (!(RX_DONE_INT_MASK & BIT(i))) {
                        /* rx-queue not binded to irq */
                        continue;
                }

                err = airoha_qdma_init_rx_queue(&qdma->q_rx[i], qdma,
                                                RX_DSCP_NUM(i));
                if (err)
                        return err;
        }

        return 0;
}

static int airoha_qdma_tx_napi_poll(struct napi_struct *napi, int budget)
{
        struct airoha_tx_irq_queue *irq_q;
        int id, done = 0, irq_queued;
        struct airoha_qdma *qdma;
        struct airoha_eth *eth;
        u32 status, head;

        irq_q = container_of(napi, struct airoha_tx_irq_queue, napi);
        qdma = irq_q->qdma;
        id = irq_q - &qdma->q_tx_irq[0];
        eth = qdma->eth;

        status = airoha_qdma_rr(qdma, REG_IRQ_STATUS(id));
        head = FIELD_GET(IRQ_HEAD_IDX_MASK, status);
        head = head % irq_q->size;
        irq_queued = FIELD_GET(IRQ_ENTRY_LEN_MASK, status);

        while (irq_queued > 0 && done < budget) {
                u32 qid, val = irq_q->q[head];
                struct airoha_qdma_desc *desc;
                struct airoha_queue_entry *e;
                struct airoha_queue *q;
                u32 index, desc_ctrl;
                struct sk_buff *skb;

                if (val == 0xff)
                        break;

                irq_q->q[head] = 0xff; /* mark as done */
                head = (head + 1) % irq_q->size;
                irq_queued--;
                done++;

                qid = FIELD_GET(IRQ_RING_IDX_MASK, val);
                if (qid >= ARRAY_SIZE(qdma->q_tx))
                        continue;

                q = &qdma->q_tx[qid];
                if (!q->ndesc)
                        continue;

                index = FIELD_GET(IRQ_DESC_IDX_MASK, val);
                if (index >= q->ndesc)
                        continue;

                spin_lock_bh(&q->lock);

                if (!q->queued)
                        goto unlock;

                desc = &q->desc[index];
                desc_ctrl = le32_to_cpu(desc->ctrl);

                if (!(desc_ctrl & QDMA_DESC_DONE_MASK) &&
                    !(desc_ctrl & QDMA_DESC_DROP_MASK))
                        goto unlock;

                e = &q->entry[index];
                skb = e->skb;

                dma_unmap_single(eth->dev, e->dma_addr, e->dma_len,
                                 DMA_TO_DEVICE);
                memset(e, 0, sizeof(*e));
                WRITE_ONCE(desc->msg0, 0);
                WRITE_ONCE(desc->msg1, 0);
                q->queued--;

                /* completion ring can report out-of-order indexes if hw QoS
                 * is enabled and packets with different priority are queued
                 * to same DMA ring. Take into account possible out-of-order
                 * reports incrementing DMA ring tail pointer
                 */
                while (q->tail != q->head && !q->entry[q->tail].dma_addr)
                        q->tail = (q->tail + 1) % q->ndesc;

                if (skb) {
                        u16 queue = skb_get_queue_mapping(skb);
                        struct netdev_queue *txq;

                        txq = netdev_get_tx_queue(skb->dev, queue);
                        netdev_tx_completed_queue(txq, 1, skb->len);
                        if (netif_tx_queue_stopped(txq) &&
                            q->ndesc - q->queued >= q->free_thr)
                                netif_tx_wake_queue(txq);

                        dev_kfree_skb_any(skb);
                }
unlock:
                spin_unlock_bh(&q->lock);
        }

        if (done) {
                int i, len = done >> 7;

                for (i = 0; i < len; i++)
                        airoha_qdma_rmw(qdma, REG_IRQ_CLEAR_LEN(id),
                                        IRQ_CLEAR_LEN_MASK, 0x80);
                airoha_qdma_rmw(qdma, REG_IRQ_CLEAR_LEN(id),
                                IRQ_CLEAR_LEN_MASK, (done & 0x7f));
        }

        if (done < budget && napi_complete(napi))
                airoha_qdma_irq_enable(qdma, QDMA_INT_REG_IDX0,
                                       TX_DONE_INT_MASK(id));

        return done;
}

static int airoha_qdma_init_tx_queue(struct airoha_queue *q,
                                     struct airoha_qdma *qdma, int size)
{
        struct airoha_eth *eth = qdma->eth;
        int i, qid = q - &qdma->q_tx[0];
        dma_addr_t dma_addr;

        spin_lock_init(&q->lock);
        q->ndesc = size;
        q->qdma = qdma;
        q->free_thr = 1 + MAX_SKB_FRAGS;

        q->entry = devm_kzalloc(eth->dev, q->ndesc * sizeof(*q->entry),
                                GFP_KERNEL);
        if (!q->entry)
                return -ENOMEM;

        q->desc = dmam_alloc_coherent(eth->dev, q->ndesc * sizeof(*q->desc),
                                      &dma_addr, GFP_KERNEL);
        if (!q->desc)
                return -ENOMEM;

        for (i = 0; i < q->ndesc; i++) {
                u32 val;

                val = FIELD_PREP(QDMA_DESC_DONE_MASK, 1);
                WRITE_ONCE(q->desc[i].ctrl, cpu_to_le32(val));
        }

        airoha_qdma_wr(qdma, REG_TX_RING_BASE(qid), dma_addr);
        airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid), TX_RING_CPU_IDX_MASK,
                        FIELD_PREP(TX_RING_CPU_IDX_MASK, q->head));
        airoha_qdma_rmw(qdma, REG_TX_DMA_IDX(qid), TX_RING_DMA_IDX_MASK,
                        FIELD_PREP(TX_RING_DMA_IDX_MASK, q->head));

        return 0;
}

static int airoha_qdma_tx_irq_init(struct airoha_tx_irq_queue *irq_q,
                                   struct airoha_qdma *qdma, int size)
{
        int id = irq_q - &qdma->q_tx_irq[0];
        struct airoha_eth *eth = qdma->eth;
        dma_addr_t dma_addr;

        netif_napi_add_tx(eth->napi_dev, &irq_q->napi,
                          airoha_qdma_tx_napi_poll);
        irq_q->q = dmam_alloc_coherent(eth->dev, size * sizeof(u32),
                                       &dma_addr, GFP_KERNEL);
        if (!irq_q->q)
                return -ENOMEM;

        memset(irq_q->q, 0xff, size * sizeof(u32));
        irq_q->size = size;
        irq_q->qdma = qdma;

        airoha_qdma_wr(qdma, REG_TX_IRQ_BASE(id), dma_addr);
        airoha_qdma_rmw(qdma, REG_TX_IRQ_CFG(id), TX_IRQ_DEPTH_MASK,
                        FIELD_PREP(TX_IRQ_DEPTH_MASK, size));
        airoha_qdma_rmw(qdma, REG_TX_IRQ_CFG(id), TX_IRQ_THR_MASK,
                        FIELD_PREP(TX_IRQ_THR_MASK, 1));

        return 0;
}

static int airoha_qdma_init_tx(struct airoha_qdma *qdma)
{
        int i, err;

        for (i = 0; i < ARRAY_SIZE(qdma->q_tx_irq); i++) {
                err = airoha_qdma_tx_irq_init(&qdma->q_tx_irq[i], qdma,
                                              IRQ_QUEUE_LEN(i));
                if (err)
                        return err;
        }

        for (i = 0; i < ARRAY_SIZE(qdma->q_tx); i++) {
                err = airoha_qdma_init_tx_queue(&qdma->q_tx[i], qdma,
                                                TX_DSCP_NUM);
                if (err)
                        return err;
        }

        return 0;
}

static void airoha_qdma_cleanup_tx_queue(struct airoha_queue *q)
{
        struct airoha_eth *eth = q->qdma->eth;

        spin_lock_bh(&q->lock);
        while (q->queued) {
                struct airoha_queue_entry *e = &q->entry[q->tail];

                dma_unmap_single(eth->dev, e->dma_addr, e->dma_len,
                                 DMA_TO_DEVICE);
                dev_kfree_skb_any(e->skb);
                e->skb = NULL;

                q->tail = (q->tail + 1) % q->ndesc;
                q->queued--;
        }
        spin_unlock_bh(&q->lock);
}

static int airoha_qdma_init_hfwd_queues(struct airoha_qdma *qdma)
{
        struct airoha_eth *eth = qdma->eth;
        dma_addr_t dma_addr;
        u32 status;
        int size;

        size = HW_DSCP_NUM * sizeof(struct airoha_qdma_fwd_desc);
        qdma->hfwd.desc = dmam_alloc_coherent(eth->dev, size, &dma_addr,
                                              GFP_KERNEL);
        if (!qdma->hfwd.desc)
                return -ENOMEM;

        airoha_qdma_wr(qdma, REG_FWD_DSCP_BASE, dma_addr);

        size = AIROHA_MAX_PACKET_SIZE * HW_DSCP_NUM;
        qdma->hfwd.q = dmam_alloc_coherent(eth->dev, size, &dma_addr,
                                           GFP_KERNEL);
        if (!qdma->hfwd.q)
                return -ENOMEM;

        airoha_qdma_wr(qdma, REG_FWD_BUF_BASE, dma_addr);

        airoha_qdma_rmw(qdma, REG_HW_FWD_DSCP_CFG,
                        HW_FWD_DSCP_PAYLOAD_SIZE_MASK,
                        FIELD_PREP(HW_FWD_DSCP_PAYLOAD_SIZE_MASK, 0));
        airoha_qdma_rmw(qdma, REG_FWD_DSCP_LOW_THR, FWD_DSCP_LOW_THR_MASK,
                        FIELD_PREP(FWD_DSCP_LOW_THR_MASK, 128));
        airoha_qdma_rmw(qdma, REG_LMGR_INIT_CFG,
                        LMGR_INIT_START | LMGR_SRAM_MODE_MASK |
                        HW_FWD_DESC_NUM_MASK,
                        FIELD_PREP(HW_FWD_DESC_NUM_MASK, HW_DSCP_NUM) |
                        LMGR_INIT_START);

        return read_poll_timeout(airoha_qdma_rr, status,
                                 !(status & LMGR_INIT_START), USEC_PER_MSEC,
                                 30 * USEC_PER_MSEC, true, qdma,
                                 REG_LMGR_INIT_CFG);
}

static void airoha_qdma_init_qos(struct airoha_qdma *qdma)
{
        airoha_qdma_clear(qdma, REG_TXWRR_MODE_CFG, TWRR_WEIGHT_SCALE_MASK);
        airoha_qdma_set(qdma, REG_TXWRR_MODE_CFG, TWRR_WEIGHT_BASE_MASK);

        airoha_qdma_clear(qdma, REG_PSE_BUF_USAGE_CFG,
                          PSE_BUF_ESTIMATE_EN_MASK);

        airoha_qdma_set(qdma, REG_EGRESS_RATE_METER_CFG,
                        EGRESS_RATE_METER_EN_MASK |
                        EGRESS_RATE_METER_EQ_RATE_EN_MASK);
        /* 2047us x 31 = 63.457ms */
        airoha_qdma_rmw(qdma, REG_EGRESS_RATE_METER_CFG,
                        EGRESS_RATE_METER_WINDOW_SZ_MASK,
                        FIELD_PREP(EGRESS_RATE_METER_WINDOW_SZ_MASK, 0x1f));
        airoha_qdma_rmw(qdma, REG_EGRESS_RATE_METER_CFG,
                        EGRESS_RATE_METER_TIMESLICE_MASK,
                        FIELD_PREP(EGRESS_RATE_METER_TIMESLICE_MASK, 0x7ff));

        /* ratelimit init */
        airoha_qdma_set(qdma, REG_GLB_TRTCM_CFG, GLB_TRTCM_EN_MASK);
        /* fast-tick 25us */
        airoha_qdma_rmw(qdma, REG_GLB_TRTCM_CFG, GLB_FAST_TICK_MASK,
                        FIELD_PREP(GLB_FAST_TICK_MASK, 25));
        airoha_qdma_rmw(qdma, REG_GLB_TRTCM_CFG, GLB_SLOW_TICK_RATIO_MASK,
                        FIELD_PREP(GLB_SLOW_TICK_RATIO_MASK, 40));

        airoha_qdma_set(qdma, REG_EGRESS_TRTCM_CFG, EGRESS_TRTCM_EN_MASK);
        airoha_qdma_rmw(qdma, REG_EGRESS_TRTCM_CFG, EGRESS_FAST_TICK_MASK,
                        FIELD_PREP(EGRESS_FAST_TICK_MASK, 25));
        airoha_qdma_rmw(qdma, REG_EGRESS_TRTCM_CFG,
                        EGRESS_SLOW_TICK_RATIO_MASK,
                        FIELD_PREP(EGRESS_SLOW_TICK_RATIO_MASK, 40));

        airoha_qdma_set(qdma, REG_INGRESS_TRTCM_CFG, INGRESS_TRTCM_EN_MASK);
        airoha_qdma_clear(qdma, REG_INGRESS_TRTCM_CFG,
                          INGRESS_TRTCM_MODE_MASK);
        airoha_qdma_rmw(qdma, REG_INGRESS_TRTCM_CFG, INGRESS_FAST_TICK_MASK,
                        FIELD_PREP(INGRESS_FAST_TICK_MASK, 125));
        airoha_qdma_rmw(qdma, REG_INGRESS_TRTCM_CFG,
                        INGRESS_SLOW_TICK_RATIO_MASK,
                        FIELD_PREP(INGRESS_SLOW_TICK_RATIO_MASK, 8));

        airoha_qdma_set(qdma, REG_SLA_TRTCM_CFG, SLA_TRTCM_EN_MASK);
        airoha_qdma_rmw(qdma, REG_SLA_TRTCM_CFG, SLA_FAST_TICK_MASK,
                        FIELD_PREP(SLA_FAST_TICK_MASK, 25));
        airoha_qdma_rmw(qdma, REG_SLA_TRTCM_CFG, SLA_SLOW_TICK_RATIO_MASK,
                        FIELD_PREP(SLA_SLOW_TICK_RATIO_MASK, 40));
}

static int airoha_qdma_hw_init(struct airoha_qdma *qdma)
{
        int i;

        /* clear pending irqs */
        for (i = 0; i < ARRAY_SIZE(qdma->irqmask); i++)
                airoha_qdma_wr(qdma, REG_INT_STATUS(i), 0xffffffff);

        /* setup irqs */
        airoha_qdma_irq_enable(qdma, QDMA_INT_REG_IDX0, INT_IDX0_MASK);
        airoha_qdma_irq_enable(qdma, QDMA_INT_REG_IDX1, INT_IDX1_MASK);
        airoha_qdma_irq_enable(qdma, QDMA_INT_REG_IDX4, INT_IDX4_MASK);

        /* setup irq binding */
        for (i = 0; i < ARRAY_SIZE(qdma->q_tx); i++) {
                if (!qdma->q_tx[i].ndesc)
                        continue;

                if (TX_RING_IRQ_BLOCKING_MAP_MASK & BIT(i))
                        airoha_qdma_set(qdma, REG_TX_RING_BLOCKING(i),
                                        TX_RING_IRQ_BLOCKING_CFG_MASK);
                else
                        airoha_qdma_clear(qdma, REG_TX_RING_BLOCKING(i),
                                          TX_RING_IRQ_BLOCKING_CFG_MASK);
        }

        airoha_qdma_wr(qdma, REG_QDMA_GLOBAL_CFG,
                       GLOBAL_CFG_RX_2B_OFFSET_MASK |
                       FIELD_PREP(GLOBAL_CFG_DMA_PREFERENCE_MASK, 3) |
                       GLOBAL_CFG_CPU_TXR_RR_MASK |
                       GLOBAL_CFG_PAYLOAD_BYTE_SWAP_MASK |
                       GLOBAL_CFG_MULTICAST_MODIFY_FP_MASK |
                       GLOBAL_CFG_MULTICAST_EN_MASK |
                       GLOBAL_CFG_IRQ0_EN_MASK | GLOBAL_CFG_IRQ1_EN_MASK |
                       GLOBAL_CFG_TX_WB_DONE_MASK |
                       FIELD_PREP(GLOBAL_CFG_MAX_ISSUE_NUM_MASK, 2));

        airoha_qdma_init_qos(qdma);

        /* disable qdma rx delay interrupt */
        for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
                if (!qdma->q_rx[i].ndesc)
                        continue;

                airoha_qdma_clear(qdma, REG_RX_DELAY_INT_IDX(i),
                                  RX_DELAY_INT_MASK);
        }

        airoha_qdma_set(qdma, REG_TXQ_CNGST_CFG,
                        TXQ_CNGST_DROP_EN | TXQ_CNGST_DEI_DROP_EN);

        return 0;
}

static irqreturn_t airoha_irq_handler(int irq, void *dev_instance)
{
        struct airoha_qdma *qdma = dev_instance;
        u32 intr[ARRAY_SIZE(qdma->irqmask)];
        int i;

        for (i = 0; i < ARRAY_SIZE(qdma->irqmask); i++) {
                intr[i] = airoha_qdma_rr(qdma, REG_INT_STATUS(i));
                intr[i] &= qdma->irqmask[i];
                airoha_qdma_wr(qdma, REG_INT_STATUS(i), intr[i]);
        }

        if (!test_bit(DEV_STATE_INITIALIZED, &qdma->eth->state))
                return IRQ_NONE;

        if (intr[1] & RX_DONE_INT_MASK) {
                airoha_qdma_irq_disable(qdma, QDMA_INT_REG_IDX1,
                                        RX_DONE_INT_MASK);

                for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
                        if (!qdma->q_rx[i].ndesc)
                                continue;

                        if (intr[1] & BIT(i))
                                napi_schedule(&qdma->q_rx[i].napi);
                }
        }

        if (intr[0] & INT_TX_MASK) {
                for (i = 0; i < ARRAY_SIZE(qdma->q_tx_irq); i++) {
                        if (!(intr[0] & TX_DONE_INT_MASK(i)))
                                continue;

                        airoha_qdma_irq_disable(qdma, QDMA_INT_REG_IDX0,
                                                TX_DONE_INT_MASK(i));
                        napi_schedule(&qdma->q_tx_irq[i].napi);
                }
        }

        return IRQ_HANDLED;
}

static int airoha_qdma_init(struct platform_device *pdev,
                            struct airoha_eth *eth,
                            struct airoha_qdma *qdma)
{
        int err, id = qdma - &eth->qdma[0];
        const char *res;

        spin_lock_init(&qdma->irq_lock);
        qdma->eth = eth;

        res = devm_kasprintf(eth->dev, GFP_KERNEL, "qdma%d", id);
        if (!res)
                return -ENOMEM;

        qdma->regs = devm_platform_ioremap_resource_byname(pdev, res);
        if (IS_ERR(qdma->regs))
                return dev_err_probe(eth->dev, PTR_ERR(qdma->regs),
                                     "failed to iomap qdma%d regs\n", id);

        qdma->irq = platform_get_irq(pdev, 4 * id);
        if (qdma->irq < 0)
                return qdma->irq;

        err = devm_request_irq(eth->dev, qdma->irq, airoha_irq_handler,
                               IRQF_SHARED, KBUILD_MODNAME, qdma);
        if (err)
                return err;

        err = airoha_qdma_init_rx(qdma);
        if (err)
                return err;

        err = airoha_qdma_init_tx(qdma);
        if (err)
                return err;

        err = airoha_qdma_init_hfwd_queues(qdma);
        if (err)
                return err;

        return airoha_qdma_hw_init(qdma);
}

static int airoha_hw_init(struct platform_device *pdev,
                          struct airoha_eth *eth)
{
        int err, i;

        /* disable xsi */
        err = reset_control_bulk_assert(ARRAY_SIZE(eth->xsi_rsts),
                                        eth->xsi_rsts);
        if (err)
                return err;

        err = reset_control_bulk_assert(ARRAY_SIZE(eth->rsts), eth->rsts);
        if (err)
                return err;

        msleep(20);
        err = reset_control_bulk_deassert(ARRAY_SIZE(eth->rsts), eth->rsts);
        if (err)
                return err;

        msleep(20);
        err = airoha_fe_init(eth);
        if (err)
                return err;

        for (i = 0; i < ARRAY_SIZE(eth->qdma); i++) {
                err = airoha_qdma_init(pdev, eth, &eth->qdma[i]);
                if (err)
                        return err;
        }

        set_bit(DEV_STATE_INITIALIZED, &eth->state);

        return 0;
}

static void airoha_hw_cleanup(struct airoha_qdma *qdma)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
                if (!qdma->q_rx[i].ndesc)
                        continue;

                napi_disable(&qdma->q_rx[i].napi);
                netif_napi_del(&qdma->q_rx[i].napi);
                airoha_qdma_cleanup_rx_queue(&qdma->q_rx[i]);
                if (qdma->q_rx[i].page_pool)
                        page_pool_destroy(qdma->q_rx[i].page_pool);
        }

        for (i = 0; i < ARRAY_SIZE(qdma->q_tx_irq); i++) {
                napi_disable(&qdma->q_tx_irq[i].napi);
                netif_napi_del(&qdma->q_tx_irq[i].napi);
        }

        for (i = 0; i < ARRAY_SIZE(qdma->q_tx); i++) {
                if (!qdma->q_tx[i].ndesc)
                        continue;

                airoha_qdma_cleanup_tx_queue(&qdma->q_tx[i]);
        }
}

static void airoha_qdma_start_napi(struct airoha_qdma *qdma)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(qdma->q_tx_irq); i++)
                napi_enable(&qdma->q_tx_irq[i].napi);

        for (i = 0; i < ARRAY_SIZE(qdma->q_rx); i++) {
                if (!qdma->q_rx[i].ndesc)
                        continue;

                napi_enable(&qdma->q_rx[i].napi);
        }
}

static void airoha_update_hw_stats(struct airoha_gdm_port *port)
{
        struct airoha_eth *eth = port->qdma->eth;
        u32 val, i = 0;

        spin_lock(&port->stats.lock);
        u64_stats_update_begin(&port->stats.syncp);

        /* TX */
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_PKT_CNT_H(port->id));
        port->stats.tx_ok_pkts += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_PKT_CNT_L(port->id));
        port->stats.tx_ok_pkts += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_BYTE_CNT_H(port->id));
        port->stats.tx_ok_bytes += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_OK_BYTE_CNT_L(port->id));
        port->stats.tx_ok_bytes += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_DROP_CNT(port->id));
        port->stats.tx_drops += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_BC_CNT(port->id));
        port->stats.tx_broadcast += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_MC_CNT(port->id));
        port->stats.tx_multicast += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_RUNT_CNT(port->id));
        port->stats.tx_len[i] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_E64_CNT_H(port->id));
        port->stats.tx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_E64_CNT_L(port->id));
        port->stats.tx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L64_CNT_H(port->id));
        port->stats.tx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L64_CNT_L(port->id));
        port->stats.tx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L127_CNT_H(port->id));
        port->stats.tx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L127_CNT_L(port->id));
        port->stats.tx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L255_CNT_H(port->id));
        port->stats.tx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L255_CNT_L(port->id));
        port->stats.tx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L511_CNT_H(port->id));
        port->stats.tx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L511_CNT_L(port->id));
        port->stats.tx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L1023_CNT_H(port->id));
        port->stats.tx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_L1023_CNT_L(port->id));
        port->stats.tx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_TX_ETH_LONG_CNT(port->id));
        port->stats.tx_len[i++] += val;

        /* RX */
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_PKT_CNT_H(port->id));
        port->stats.rx_ok_pkts += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_PKT_CNT_L(port->id));
        port->stats.rx_ok_pkts += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_BYTE_CNT_H(port->id));
        port->stats.rx_ok_bytes += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_OK_BYTE_CNT_L(port->id));
        port->stats.rx_ok_bytes += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_DROP_CNT(port->id));
        port->stats.rx_drops += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_BC_CNT(port->id));
        port->stats.rx_broadcast += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_MC_CNT(port->id));
        port->stats.rx_multicast += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ERROR_DROP_CNT(port->id));
        port->stats.rx_errors += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_CRC_ERR_CNT(port->id));
        port->stats.rx_crc_error += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_OVERFLOW_DROP_CNT(port->id));
        port->stats.rx_over_errors += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_FRAG_CNT(port->id));
        port->stats.rx_fragment += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_JABBER_CNT(port->id));
        port->stats.rx_jabber += val;

        i = 0;
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_RUNT_CNT(port->id));
        port->stats.rx_len[i] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_E64_CNT_H(port->id));
        port->stats.rx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_E64_CNT_L(port->id));
        port->stats.rx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L64_CNT_H(port->id));
        port->stats.rx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L64_CNT_L(port->id));
        port->stats.rx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L127_CNT_H(port->id));
        port->stats.rx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L127_CNT_L(port->id));
        port->stats.rx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L255_CNT_H(port->id));
        port->stats.rx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L255_CNT_L(port->id));
        port->stats.rx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L511_CNT_H(port->id));
        port->stats.rx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L511_CNT_L(port->id));
        port->stats.rx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L1023_CNT_H(port->id));
        port->stats.rx_len[i] += ((u64)val << 32);
        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_L1023_CNT_L(port->id));
        port->stats.rx_len[i++] += val;

        val = airoha_fe_rr(eth, REG_FE_GDM_RX_ETH_LONG_CNT(port->id));
        port->stats.rx_len[i++] += val;

        /* reset mib counters */
        airoha_fe_set(eth, REG_FE_GDM_MIB_CLEAR(port->id),
                      FE_GDM_MIB_RX_CLEAR_MASK | FE_GDM_MIB_TX_CLEAR_MASK);

        u64_stats_update_end(&port->stats.syncp);
        spin_unlock(&port->stats.lock);
}

static int airoha_dev_open(struct net_device *dev)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        struct airoha_qdma *qdma = port->qdma;
        int err;

        netif_tx_start_all_queues(dev);
        err = airoha_set_gdm_ports(qdma->eth, true);
        if (err)
                return err;

        if (netdev_uses_dsa(dev))
                airoha_fe_set(qdma->eth, REG_GDM_INGRESS_CFG(port->id),
                              GDM_STAG_EN_MASK);
        else
                airoha_fe_clear(qdma->eth, REG_GDM_INGRESS_CFG(port->id),
                                GDM_STAG_EN_MASK);

        airoha_qdma_set(qdma, REG_QDMA_GLOBAL_CFG,
                        GLOBAL_CFG_TX_DMA_EN_MASK |
                        GLOBAL_CFG_RX_DMA_EN_MASK);

        return 0;
}

static int airoha_dev_stop(struct net_device *dev)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        struct airoha_qdma *qdma = port->qdma;
        int i, err;

        netif_tx_disable(dev);
        err = airoha_set_gdm_ports(qdma->eth, false);
        if (err)
                return err;

        airoha_qdma_clear(qdma, REG_QDMA_GLOBAL_CFG,
                          GLOBAL_CFG_TX_DMA_EN_MASK |
                          GLOBAL_CFG_RX_DMA_EN_MASK);

        for (i = 0; i < ARRAY_SIZE(qdma->q_tx); i++) {
                if (!qdma->q_tx[i].ndesc)
                        continue;

                airoha_qdma_cleanup_tx_queue(&qdma->q_tx[i]);
                netdev_tx_reset_subqueue(dev, i);
        }

        return 0;
}

static int airoha_dev_set_macaddr(struct net_device *dev, void *p)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        int err;

        err = eth_mac_addr(dev, p);
        if (err)
                return err;

        airoha_set_macaddr(port, dev->dev_addr);

        return 0;
}

static int airoha_dev_init(struct net_device *dev)
{
        struct airoha_gdm_port *port = netdev_priv(dev);

        airoha_set_macaddr(port, dev->dev_addr);

        return 0;
}

static void airoha_dev_get_stats64(struct net_device *dev,
                                   struct rtnl_link_stats64 *storage)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        unsigned int start;

        airoha_update_hw_stats(port);
        do {
                start = u64_stats_fetch_begin(&port->stats.syncp);
                storage->rx_packets = port->stats.rx_ok_pkts;
                storage->tx_packets = port->stats.tx_ok_pkts;
                storage->rx_bytes = port->stats.rx_ok_bytes;
                storage->tx_bytes = port->stats.tx_ok_bytes;
                storage->multicast = port->stats.rx_multicast;
                storage->rx_errors = port->stats.rx_errors;
                storage->rx_dropped = port->stats.rx_drops;
                storage->tx_dropped = port->stats.tx_drops;
                storage->rx_crc_errors = port->stats.rx_crc_error;
                storage->rx_over_errors = port->stats.rx_over_errors;
        } while (u64_stats_fetch_retry(&port->stats.syncp, start));
}

static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb,
                                   struct net_device *dev)
{
        struct skb_shared_info *sinfo = skb_shinfo(skb);
        struct airoha_gdm_port *port = netdev_priv(dev);
        u32 msg0 = 0, msg1, len = skb_headlen(skb);
        int i, qid = skb_get_queue_mapping(skb);
        struct airoha_qdma *qdma = port->qdma;
        u32 nr_frags = 1 + sinfo->nr_frags;
        struct netdev_queue *txq;
        struct airoha_queue *q;
        void *data = skb->data;
        u16 index;
        u8 fport;

        if (skb->ip_summed == CHECKSUM_PARTIAL)
                msg0 |= FIELD_PREP(QDMA_ETH_TXMSG_TCO_MASK, 1) |
                        FIELD_PREP(QDMA_ETH_TXMSG_UCO_MASK, 1) |
                        FIELD_PREP(QDMA_ETH_TXMSG_ICO_MASK, 1);

        /* TSO: fill MSS info in tcp checksum field */
        if (skb_is_gso(skb)) {
                if (skb_cow_head(skb, 0))
                        goto error;

                if (sinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
                        __be16 csum = cpu_to_be16(sinfo->gso_size);

                        tcp_hdr(skb)->check = (__force __sum16)csum;
                        msg0 |= FIELD_PREP(QDMA_ETH_TXMSG_TSO_MASK, 1);
                }
        }

        fport = port->id == 4 ? FE_PSE_PORT_GDM4 : port->id;
        msg1 = FIELD_PREP(QDMA_ETH_TXMSG_FPORT_MASK, fport) |
               FIELD_PREP(QDMA_ETH_TXMSG_METER_MASK, 0x7f);

        q = &qdma->q_tx[qid];
        if (WARN_ON_ONCE(!q->ndesc))
                goto error;

        spin_lock_bh(&q->lock);

        txq = netdev_get_tx_queue(dev, qid);
        if (q->queued + nr_frags > q->ndesc) {
                /* not enough space in the queue */
                netif_tx_stop_queue(txq);
                spin_unlock_bh(&q->lock);
                return NETDEV_TX_BUSY;
        }

        index = q->head;
        for (i = 0; i < nr_frags; i++) {
                struct airoha_qdma_desc *desc = &q->desc[index];
                struct airoha_queue_entry *e = &q->entry[index];
                skb_frag_t *frag = &sinfo->frags[i];
                dma_addr_t addr;
                u32 val;

                addr = dma_map_single(dev->dev.parent, data, len,
                                      DMA_TO_DEVICE);
                if (unlikely(dma_mapping_error(dev->dev.parent, addr)))
                        goto error_unmap;

                index = (index + 1) % q->ndesc;

                val = FIELD_PREP(QDMA_DESC_LEN_MASK, len);
                if (i < nr_frags - 1)
                        val |= FIELD_PREP(QDMA_DESC_MORE_MASK, 1);
                WRITE_ONCE(desc->ctrl, cpu_to_le32(val));
                WRITE_ONCE(desc->addr, cpu_to_le32(addr));
                val = FIELD_PREP(QDMA_DESC_NEXT_ID_MASK, index);
                WRITE_ONCE(desc->data, cpu_to_le32(val));
                WRITE_ONCE(desc->msg0, cpu_to_le32(msg0));
                WRITE_ONCE(desc->msg1, cpu_to_le32(msg1));
                WRITE_ONCE(desc->msg2, cpu_to_le32(0xffff));

                e->skb = i ? NULL : skb;
                e->dma_addr = addr;
                e->dma_len = len;

                data = skb_frag_address(frag);
                len = skb_frag_size(frag);
        }

        q->head = index;
        q->queued += i;

        skb_tx_timestamp(skb);
        netdev_tx_sent_queue(txq, skb->len);

        if (netif_xmit_stopped(txq) || !netdev_xmit_more())
                airoha_qdma_rmw(qdma, REG_TX_CPU_IDX(qid),
                                TX_RING_CPU_IDX_MASK,
                                FIELD_PREP(TX_RING_CPU_IDX_MASK, q->head));

        if (q->ndesc - q->queued < q->free_thr)
                netif_tx_stop_queue(txq);

        spin_unlock_bh(&q->lock);

        return NETDEV_TX_OK;

error_unmap:
        for (i--; i >= 0; i--) {
                index = (q->head + i) % q->ndesc;
                dma_unmap_single(dev->dev.parent, q->entry[index].dma_addr,
                                 q->entry[index].dma_len, DMA_TO_DEVICE);
        }

        spin_unlock_bh(&q->lock);
error:
        dev_kfree_skb_any(skb);
        dev->stats.tx_dropped++;

        return NETDEV_TX_OK;
}

static void airoha_ethtool_get_drvinfo(struct net_device *dev,
                                       struct ethtool_drvinfo *info)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        struct airoha_eth *eth = port->qdma->eth;

        strscpy(info->driver, eth->dev->driver->name, sizeof(info->driver));
        strscpy(info->bus_info, dev_name(eth->dev), sizeof(info->bus_info));
}

static void airoha_ethtool_get_mac_stats(struct net_device *dev,
                                         struct ethtool_eth_mac_stats *stats)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        unsigned int start;

        airoha_update_hw_stats(port);
        do {
                start = u64_stats_fetch_begin(&port->stats.syncp);
                stats->MulticastFramesXmittedOK = port->stats.tx_multicast;
                stats->BroadcastFramesXmittedOK = port->stats.tx_broadcast;
                stats->BroadcastFramesReceivedOK = port->stats.rx_broadcast;
        } while (u64_stats_fetch_retry(&port->stats.syncp, start));
}

static const struct ethtool_rmon_hist_range airoha_ethtool_rmon_ranges[] = {
        {    0,    64 },
        {   65,   127 },
        {  128,   255 },
        {  256,   511 },
        {  512,  1023 },
        { 1024,  1518 },
        { 1519, 10239 },
        {},
};

static void
airoha_ethtool_get_rmon_stats(struct net_device *dev,
                              struct ethtool_rmon_stats *stats,
                              const struct ethtool_rmon_hist_range **ranges)
{
        struct airoha_gdm_port *port = netdev_priv(dev);
        struct airoha_hw_stats *hw_stats = &port->stats;
        unsigned int start;

        BUILD_BUG_ON(ARRAY_SIZE(airoha_ethtool_rmon_ranges) !=
                     ARRAY_SIZE(hw_stats->tx_len) + 1);
        BUILD_BUG_ON(ARRAY_SIZE(airoha_ethtool_rmon_ranges) !=
                     ARRAY_SIZE(hw_stats->rx_len) + 1);

        *ranges = airoha_ethtool_rmon_ranges;
        airoha_update_hw_stats(port);
        do {
                int i;

                start = u64_stats_fetch_begin(&port->stats.syncp);
                stats->fragments = hw_stats->rx_fragment;
                stats->jabbers = hw_stats->rx_jabber;
                for (i = 0; i < ARRAY_SIZE(airoha_ethtool_rmon_ranges) - 1;
                     i++) {
                        stats->hist[i] = hw_stats->rx_len[i];
                        stats->hist_tx[i] = hw_stats->tx_len[i];
                }
        } while (u64_stats_fetch_retry(&port->stats.syncp, start));
}

static const struct net_device_ops airoha_netdev_ops = {
        .ndo_init               = airoha_dev_init,
        .ndo_open               = airoha_dev_open,
        .ndo_stop               = airoha_dev_stop,
        .ndo_start_xmit         = airoha_dev_xmit,
        .ndo_get_stats64        = airoha_dev_get_stats64,
        .ndo_set_mac_address    = airoha_dev_set_macaddr,
};

static const struct ethtool_ops airoha_ethtool_ops = {
        .get_drvinfo            = airoha_ethtool_get_drvinfo,
        .get_eth_mac_stats      = airoha_ethtool_get_mac_stats,
        .get_rmon_stats         = airoha_ethtool_get_rmon_stats,
};

static int airoha_alloc_gdm_port(struct airoha_eth *eth, struct device_node *np)
{
        const __be32 *id_ptr = of_get_property(np, "reg", NULL);
        struct airoha_gdm_port *port;
        struct airoha_qdma *qdma;
        struct net_device *dev;
        int err, index;
        u32 id;

        if (!id_ptr) {
                dev_err(eth->dev, "missing gdm port id\n");
                return -EINVAL;
        }

        id = be32_to_cpup(id_ptr);
        index = id - 1;

        if (!id || id > ARRAY_SIZE(eth->ports)) {
                dev_err(eth->dev, "invalid gdm port id: %d\n", id);
                return -EINVAL;
        }

        if (eth->ports[index]) {
                dev_err(eth->dev, "duplicate gdm port id: %d\n", id);
                return -EINVAL;
        }

        dev = devm_alloc_etherdev_mqs(eth->dev, sizeof(*port),
                                      AIROHA_NUM_TX_RING, AIROHA_NUM_RX_RING);
        if (!dev) {
                dev_err(eth->dev, "alloc_etherdev failed\n");
                return -ENOMEM;
        }

        qdma = &eth->qdma[index % AIROHA_MAX_NUM_QDMA];
        dev->netdev_ops = &airoha_netdev_ops;
        dev->ethtool_ops = &airoha_ethtool_ops;
        dev->max_mtu = AIROHA_MAX_MTU;
        dev->watchdog_timeo = 5 * HZ;
        dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
                           NETIF_F_TSO6 | NETIF_F_IPV6_CSUM |
                           NETIF_F_SG | NETIF_F_TSO;
        dev->features |= dev->hw_features;
        dev->dev.of_node = np;
        dev->irq = qdma->irq;
        SET_NETDEV_DEV(dev, eth->dev);

        err = of_get_ethdev_address(np, dev);
        if (err) {
                if (err == -EPROBE_DEFER)
                        return err;

                eth_hw_addr_random(dev);
                dev_info(eth->dev, "generated random MAC address %pM\n",
                         dev->dev_addr);
        }

        port = netdev_priv(dev);
        u64_stats_init(&port->stats.syncp);
        spin_lock_init(&port->stats.lock);
        port->qdma = qdma;
        port->dev = dev;
        port->id = id;
        eth->ports[index] = port;

        return register_netdev(dev);
}

static int airoha_probe(struct platform_device *pdev)
{
        struct device_node *np;
        struct airoha_eth *eth;
        int i, err;

        eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL);
        if (!eth)
                return -ENOMEM;

        eth->dev = &pdev->dev;

        err = dma_set_mask_and_coherent(eth->dev, DMA_BIT_MASK(32));
        if (err) {
                dev_err(eth->dev, "failed configuring DMA mask\n");
                return err;
        }

        eth->fe_regs = devm_platform_ioremap_resource_byname(pdev, "fe");
        if (IS_ERR(eth->fe_regs))
                return dev_err_probe(eth->dev, PTR_ERR(eth->fe_regs),
                                     "failed to iomap fe regs\n");

        eth->rsts[0].id = "fe";
        eth->rsts[1].id = "pdma";
        eth->rsts[2].id = "qdma";
        err = devm_reset_control_bulk_get_exclusive(eth->dev,
                                                    ARRAY_SIZE(eth->rsts),
                                                    eth->rsts);
        if (err) {
                dev_err(eth->dev, "failed to get bulk reset lines\n");
                return err;
        }

        eth->xsi_rsts[0].id = "xsi-mac";
        eth->xsi_rsts[1].id = "hsi0-mac";
        eth->xsi_rsts[2].id = "hsi1-mac";
        eth->xsi_rsts[3].id = "hsi-mac";
        eth->xsi_rsts[4].id = "xfp-mac";
        err = devm_reset_control_bulk_get_exclusive(eth->dev,
                                                    ARRAY_SIZE(eth->xsi_rsts),
                                                    eth->xsi_rsts);
        if (err) {
                dev_err(eth->dev, "failed to get bulk xsi reset lines\n");
                return err;
        }

        eth->napi_dev = alloc_netdev_dummy(0);
        if (!eth->napi_dev)
                return -ENOMEM;

        /* Enable threaded NAPI by default */
        eth->napi_dev->threaded = true;
        strscpy(eth->napi_dev->name, "qdma_eth", sizeof(eth->napi_dev->name));
        platform_set_drvdata(pdev, eth);

        err = airoha_hw_init(pdev, eth);
        if (err)
                goto error;

        for (i = 0; i < ARRAY_SIZE(eth->qdma); i++)
                airoha_qdma_start_napi(&eth->qdma[i]);

        for_each_child_of_node(pdev->dev.of_node, np) {
                if (!of_device_is_compatible(np, "airoha,eth-mac"))
                        continue;

                if (!of_device_is_available(np))
                        continue;

                err = airoha_alloc_gdm_port(eth, np);
                if (err) {
                        of_node_put(np);
                        goto error;
                }
        }

        return 0;

error:
        for (i = 0; i < ARRAY_SIZE(eth->qdma); i++)
                airoha_hw_cleanup(&eth->qdma[i]);

        for (i = 0; i < ARRAY_SIZE(eth->ports); i++) {
                struct airoha_gdm_port *port = eth->ports[i];

                if (port && port->dev->reg_state == NETREG_REGISTERED)
                        unregister_netdev(port->dev);
        }
        free_netdev(eth->napi_dev);
        platform_set_drvdata(pdev, NULL);

        return err;
}

static void airoha_remove(struct platform_device *pdev)
{
        struct airoha_eth *eth = platform_get_drvdata(pdev);
        int i;

        for (i = 0; i < ARRAY_SIZE(eth->qdma); i++)
                airoha_hw_cleanup(&eth->qdma[i]);

        for (i = 0; i < ARRAY_SIZE(eth->ports); i++) {
                struct airoha_gdm_port *port = eth->ports[i];

                if (!port)
                        continue;

                airoha_dev_stop(port->dev);
                unregister_netdev(port->dev);
        }
        free_netdev(eth->napi_dev);

        platform_set_drvdata(pdev, NULL);
}

static const struct of_device_id of_airoha_match[] = {
        { .compatible = "airoha,en7581-eth" },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, of_airoha_match);

static struct platform_driver airoha_driver = {
        .probe = airoha_probe,
        .remove = airoha_remove,
        .driver = {
                .name = KBUILD_MODNAME,
                .of_match_table = of_airoha_match,
        },
};
module_platform_driver(airoha_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Lorenzo Bianconi <[email protected]>");
MODULE_DESCRIPTION("Ethernet driver for Airoha SoC");