// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2017 Hisilicon Limited.
 */

#include "hisi_sas.h"
#define DRV_NAME "hisi_sas_v3_hw"

/* global registers need init */
#define DLVRY_QUEUE_ENABLE              0x0
#define IOST_BASE_ADDR_LO               0x8
#define IOST_BASE_ADDR_HI               0xc
#define ITCT_BASE_ADDR_LO               0x10
#define ITCT_BASE_ADDR_HI               0x14
#define IO_BROKEN_MSG_ADDR_LO           0x18
#define IO_BROKEN_MSG_ADDR_HI           0x1c
#define PHY_CONTEXT                     0x20
#define PHY_STATE                       0x24
#define PHY_PORT_NUM_MA                 0x28
#define PHY_CONN_RATE                   0x30
#define ITCT_CLR                        0x44
#define ITCT_CLR_EN_OFF                 16
#define ITCT_CLR_EN_MSK                 (0x1 << ITCT_CLR_EN_OFF)
#define ITCT_DEV_OFF                    0
#define ITCT_DEV_MSK                    (0x7ff << ITCT_DEV_OFF)
#define SAS_AXI_USER3                   0x50
#define IO_SATA_BROKEN_MSG_ADDR_LO      0x58
#define IO_SATA_BROKEN_MSG_ADDR_HI      0x5c
#define SATA_INITI_D2H_STORE_ADDR_LO    0x60
#define SATA_INITI_D2H_STORE_ADDR_HI    0x64
#define CFG_MAX_TAG                     0x68
#define HGC_SAS_TX_OPEN_FAIL_RETRY_CTRL 0x84
#define HGC_SAS_TXFAIL_RETRY_CTRL       0x88
#define HGC_GET_ITV_TIME                0x90
#define DEVICE_MSG_WORK_MODE            0x94
#define OPENA_WT_CONTI_TIME             0x9c
#define I_T_NEXUS_LOSS_TIME             0xa0
#define MAX_CON_TIME_LIMIT_TIME         0xa4
#define BUS_INACTIVE_LIMIT_TIME         0xa8
#define REJECT_TO_OPEN_LIMIT_TIME       0xac
#define CQ_INT_CONVERGE_EN              0xb0
#define CFG_AGING_TIME                  0xbc
#define HGC_DFX_CFG2                    0xc0
#define CFG_ABT_SET_QUERY_IPTT  0xd4
#define CFG_SET_ABORTED_IPTT_OFF        0
#define CFG_SET_ABORTED_IPTT_MSK        (0xfff << CFG_SET_ABORTED_IPTT_OFF)
#define CFG_SET_ABORTED_EN_OFF  12
#define CFG_ABT_SET_IPTT_DONE   0xd8
#define CFG_ABT_SET_IPTT_DONE_OFF       0
#define HGC_IOMB_PROC1_STATUS   0x104
#define HGC_LM_DFX_STATUS2              0x128
#define HGC_LM_DFX_STATUS2_IOSTLIST_OFF         0
#define HGC_LM_DFX_STATUS2_IOSTLIST_MSK (0xfff << \
                                         HGC_LM_DFX_STATUS2_IOSTLIST_OFF)
#define HGC_LM_DFX_STATUS2_ITCTLIST_OFF         12
#define HGC_LM_DFX_STATUS2_ITCTLIST_MSK (0x7ff << \
                                         HGC_LM_DFX_STATUS2_ITCTLIST_OFF)
#define HGC_CQE_ECC_ADDR                0x13c
#define HGC_CQE_ECC_1B_ADDR_OFF 0
#define HGC_CQE_ECC_1B_ADDR_MSK (0x3f << HGC_CQE_ECC_1B_ADDR_OFF)
#define HGC_CQE_ECC_MB_ADDR_OFF 8
#define HGC_CQE_ECC_MB_ADDR_MSK (0x3f << HGC_CQE_ECC_MB_ADDR_OFF)
#define HGC_IOST_ECC_ADDR               0x140
#define HGC_IOST_ECC_1B_ADDR_OFF        0
#define HGC_IOST_ECC_1B_ADDR_MSK        (0x3ff << HGC_IOST_ECC_1B_ADDR_OFF)
#define HGC_IOST_ECC_MB_ADDR_OFF        16
#define HGC_IOST_ECC_MB_ADDR_MSK        (0x3ff << HGC_IOST_ECC_MB_ADDR_OFF)
#define HGC_DQE_ECC_ADDR                0x144
#define HGC_DQE_ECC_1B_ADDR_OFF 0
#define HGC_DQE_ECC_1B_ADDR_MSK (0xfff << HGC_DQE_ECC_1B_ADDR_OFF)
#define HGC_DQE_ECC_MB_ADDR_OFF 16
#define HGC_DQE_ECC_MB_ADDR_MSK (0xfff << HGC_DQE_ECC_MB_ADDR_OFF)
#define CHNL_INT_STATUS                 0x148
#define TAB_DFX                         0x14c
#define HGC_ITCT_ECC_ADDR               0x150
#define HGC_ITCT_ECC_1B_ADDR_OFF                0
#define HGC_ITCT_ECC_1B_ADDR_MSK                (0x3ff << \
                                                 HGC_ITCT_ECC_1B_ADDR_OFF)
#define HGC_ITCT_ECC_MB_ADDR_OFF                16
#define HGC_ITCT_ECC_MB_ADDR_MSK                (0x3ff << \
                                                 HGC_ITCT_ECC_MB_ADDR_OFF)
#define HGC_AXI_FIFO_ERR_INFO  0x154
#define AXI_ERR_INFO_OFF               0
#define AXI_ERR_INFO_MSK               (0xff << AXI_ERR_INFO_OFF)
#define FIFO_ERR_INFO_OFF              8
#define FIFO_ERR_INFO_MSK              (0xff << FIFO_ERR_INFO_OFF)
#define TAB_RD_TYPE                     0x15c
#define INT_COAL_EN                     0x19c
#define OQ_INT_COAL_TIME                0x1a0
#define OQ_INT_COAL_CNT                 0x1a4
#define ENT_INT_COAL_TIME               0x1a8
#define ENT_INT_COAL_CNT                0x1ac
#define OQ_INT_SRC                      0x1b0
#define OQ_INT_SRC_MSK                  0x1b4
#define ENT_INT_SRC1                    0x1b8
#define ENT_INT_SRC1_D2H_FIS_CH0_OFF    0
#define ENT_INT_SRC1_D2H_FIS_CH0_MSK    (0x1 << ENT_INT_SRC1_D2H_FIS_CH0_OFF)
#define ENT_INT_SRC1_D2H_FIS_CH1_OFF    8
#define ENT_INT_SRC1_D2H_FIS_CH1_MSK    (0x1 << ENT_INT_SRC1_D2H_FIS_CH1_OFF)
#define ENT_INT_SRC2                    0x1bc
#define ENT_INT_SRC3                    0x1c0
#define ENT_INT_SRC3_WP_DEPTH_OFF               8
#define ENT_INT_SRC3_IPTT_SLOT_NOMATCH_OFF      9
#define ENT_INT_SRC3_RP_DEPTH_OFF               10
#define ENT_INT_SRC3_AXI_OFF                    11
#define ENT_INT_SRC3_FIFO_OFF                   12
#define ENT_INT_SRC3_LM_OFF                             14
#define ENT_INT_SRC3_ITC_INT_OFF        15
#define ENT_INT_SRC3_ITC_INT_MSK        (0x1 << ENT_INT_SRC3_ITC_INT_OFF)
#define ENT_INT_SRC3_ABT_OFF            16
#define ENT_INT_SRC3_DQE_POISON_OFF     18
#define ENT_INT_SRC3_IOST_POISON_OFF    19
#define ENT_INT_SRC3_ITCT_POISON_OFF    20
#define ENT_INT_SRC3_ITCT_NCQ_POISON_OFF        21
#define ENT_INT_SRC_MSK1                0x1c4
#define ENT_INT_SRC_MSK2                0x1c8
#define ENT_INT_SRC_MSK3                0x1cc
#define ENT_INT_SRC_MSK3_ENT95_MSK_OFF  31
#define CHNL_PHYUPDOWN_INT_MSK          0x1d0
#define CHNL_ENT_INT_MSK                        0x1d4
#define HGC_COM_INT_MSK                         0x1d8
#define ENT_INT_SRC_MSK3_ENT95_MSK_MSK  (0x1 << ENT_INT_SRC_MSK3_ENT95_MSK_OFF)
#define SAS_ECC_INTR                    0x1e8
#define SAS_ECC_INTR_DQE_ECC_1B_OFF             0
#define SAS_ECC_INTR_DQE_ECC_MB_OFF             1
#define SAS_ECC_INTR_IOST_ECC_1B_OFF    2
#define SAS_ECC_INTR_IOST_ECC_MB_OFF    3
#define SAS_ECC_INTR_ITCT_ECC_1B_OFF    4
#define SAS_ECC_INTR_ITCT_ECC_MB_OFF    5
#define SAS_ECC_INTR_ITCTLIST_ECC_1B_OFF        6
#define SAS_ECC_INTR_ITCTLIST_ECC_MB_OFF        7
#define SAS_ECC_INTR_IOSTLIST_ECC_1B_OFF        8
#define SAS_ECC_INTR_IOSTLIST_ECC_MB_OFF        9
#define SAS_ECC_INTR_CQE_ECC_1B_OFF             10
#define SAS_ECC_INTR_CQE_ECC_MB_OFF             11
#define SAS_ECC_INTR_NCQ_MEM0_ECC_1B_OFF        12
#define SAS_ECC_INTR_NCQ_MEM0_ECC_MB_OFF        13
#define SAS_ECC_INTR_NCQ_MEM1_ECC_1B_OFF        14
#define SAS_ECC_INTR_NCQ_MEM1_ECC_MB_OFF        15
#define SAS_ECC_INTR_NCQ_MEM2_ECC_1B_OFF        16
#define SAS_ECC_INTR_NCQ_MEM2_ECC_MB_OFF        17
#define SAS_ECC_INTR_NCQ_MEM3_ECC_1B_OFF        18
#define SAS_ECC_INTR_NCQ_MEM3_ECC_MB_OFF        19
#define SAS_ECC_INTR_OOO_RAM_ECC_1B_OFF         20
#define SAS_ECC_INTR_OOO_RAM_ECC_MB_OFF         21
#define SAS_ECC_INTR_MSK                0x1ec
#define HGC_ERR_STAT_EN                 0x238
#define CQE_SEND_CNT                    0x248
#define DLVRY_Q_0_BASE_ADDR_LO          0x260
#define DLVRY_Q_0_BASE_ADDR_HI          0x264
#define DLVRY_Q_0_DEPTH                 0x268
#define DLVRY_Q_0_WR_PTR                0x26c
#define DLVRY_Q_0_RD_PTR                0x270
#define HYPER_STREAM_ID_EN_CFG          0xc80
#define OQ0_INT_SRC_MSK                 0xc90
#define COMPL_Q_0_BASE_ADDR_LO          0x4e0
#define COMPL_Q_0_BASE_ADDR_HI          0x4e4
#define COMPL_Q_0_DEPTH                 0x4e8
#define COMPL_Q_0_WR_PTR                0x4ec
#define COMPL_Q_0_RD_PTR                0x4f0
#define HGC_RXM_DFX_STATUS14            0xae8
#define HGC_RXM_DFX_STATUS14_MEM0_OFF   0
#define HGC_RXM_DFX_STATUS14_MEM0_MSK   (0x1ff << \
                                         HGC_RXM_DFX_STATUS14_MEM0_OFF)
#define HGC_RXM_DFX_STATUS14_MEM1_OFF   9
#define HGC_RXM_DFX_STATUS14_MEM1_MSK   (0x1ff << \
                                         HGC_RXM_DFX_STATUS14_MEM1_OFF)
#define HGC_RXM_DFX_STATUS14_MEM2_OFF   18
#define HGC_RXM_DFX_STATUS14_MEM2_MSK   (0x1ff << \
                                         HGC_RXM_DFX_STATUS14_MEM2_OFF)
#define HGC_RXM_DFX_STATUS15            0xaec
#define HGC_RXM_DFX_STATUS15_MEM3_OFF   0
#define HGC_RXM_DFX_STATUS15_MEM3_MSK   (0x1ff << \
                                         HGC_RXM_DFX_STATUS15_MEM3_OFF)
#define AWQOS_AWCACHE_CFG       0xc84
#define ARQOS_ARCACHE_CFG       0xc88
#define HILINK_ERR_DFX          0xe04
#define SAS_GPIO_CFG_0          0x1000
#define SAS_GPIO_CFG_1          0x1004
#define SAS_GPIO_TX_0_1 0x1040
#define SAS_CFG_DRIVE_VLD       0x1070

/* phy registers requiring init */
#define PORT_BASE                       (0x2000)
#define PHY_CFG                         (PORT_BASE + 0x0)
#define HARD_PHY_LINKRATE               (PORT_BASE + 0x4)
#define PHY_CFG_ENA_OFF                 0
#define PHY_CFG_ENA_MSK                 (0x1 << PHY_CFG_ENA_OFF)
#define PHY_CFG_DC_OPT_OFF              2
#define PHY_CFG_DC_OPT_MSK              (0x1 << PHY_CFG_DC_OPT_OFF)
#define PHY_CFG_PHY_RST_OFF             3
#define PHY_CFG_PHY_RST_MSK             (0x1 << PHY_CFG_PHY_RST_OFF)
#define PROG_PHY_LINK_RATE              (PORT_BASE + 0x8)
#define CFG_PROG_PHY_LINK_RATE_OFF      0
#define CFG_PROG_PHY_LINK_RATE_MSK      (0xff << CFG_PROG_PHY_LINK_RATE_OFF)
#define CFG_PROG_OOB_PHY_LINK_RATE_OFF  8
#define CFG_PROG_OOB_PHY_LINK_RATE_MSK  (0xf << CFG_PROG_OOB_PHY_LINK_RATE_OFF)
#define PHY_CTRL                        (PORT_BASE + 0x14)
#define PHY_CTRL_RESET_OFF              0
#define PHY_CTRL_RESET_MSK              (0x1 << PHY_CTRL_RESET_OFF)
#define CMD_HDR_PIR_OFF                 8
#define CMD_HDR_PIR_MSK                 (0x1 << CMD_HDR_PIR_OFF)
#define SERDES_CFG                      (PORT_BASE + 0x1c)
#define CFG_ALOS_CHK_DISABLE_OFF        9
#define CFG_ALOS_CHK_DISABLE_MSK        (0x1 << CFG_ALOS_CHK_DISABLE_OFF)
#define SAS_PHY_BIST_CTRL               (PORT_BASE + 0x2c)
#define CFG_BIST_MODE_SEL_OFF           0
#define CFG_BIST_MODE_SEL_MSK           (0xf << CFG_BIST_MODE_SEL_OFF)
#define CFG_LOOP_TEST_MODE_OFF          14
#define CFG_LOOP_TEST_MODE_MSK          (0x3 << CFG_LOOP_TEST_MODE_OFF)
#define CFG_RX_BIST_EN_OFF              16
#define CFG_RX_BIST_EN_MSK              (0x1 << CFG_RX_BIST_EN_OFF)
#define CFG_TX_BIST_EN_OFF              17
#define CFG_TX_BIST_EN_MSK              (0x1 << CFG_TX_BIST_EN_OFF)
#define CFG_BIST_TEST_OFF               18
#define CFG_BIST_TEST_MSK               (0x1 << CFG_BIST_TEST_OFF)
#define SAS_PHY_BIST_CODE               (PORT_BASE + 0x30)
#define SAS_PHY_BIST_CODE1              (PORT_BASE + 0x34)
#define SAS_BIST_ERR_CNT                (PORT_BASE + 0x38)
#define SL_CFG                          (PORT_BASE + 0x84)
#define AIP_LIMIT                       (PORT_BASE + 0x90)
#define SL_CONTROL                      (PORT_BASE + 0x94)
#define SL_CONTROL_NOTIFY_EN_OFF        0
#define SL_CONTROL_NOTIFY_EN_MSK        (0x1 << SL_CONTROL_NOTIFY_EN_OFF)
#define SL_CTA_OFF              17
#define SL_CTA_MSK              (0x1 << SL_CTA_OFF)
#define RX_PRIMS_STATUS                 (PORT_BASE + 0x98)
#define RX_BCAST_CHG_OFF                1
#define RX_BCAST_CHG_MSK                (0x1 << RX_BCAST_CHG_OFF)
#define TX_ID_DWORD0                    (PORT_BASE + 0x9c)
#define TX_ID_DWORD1                    (PORT_BASE + 0xa0)
#define TX_ID_DWORD2                    (PORT_BASE + 0xa4)
#define TX_ID_DWORD3                    (PORT_BASE + 0xa8)
#define TX_ID_DWORD4                    (PORT_BASE + 0xaC)
#define TX_ID_DWORD5                    (PORT_BASE + 0xb0)
#define TX_ID_DWORD6                    (PORT_BASE + 0xb4)
#define TXID_AUTO                               (PORT_BASE + 0xb8)
#define CT3_OFF         1
#define CT3_MSK         (0x1 << CT3_OFF)
#define TX_HARDRST_OFF          2
#define TX_HARDRST_MSK          (0x1 << TX_HARDRST_OFF)
#define RX_IDAF_DWORD0                  (PORT_BASE + 0xc4)
#define RXOP_CHECK_CFG_H                (PORT_BASE + 0xfc)
#define STP_LINK_TIMER                  (PORT_BASE + 0x120)
#define STP_LINK_TIMEOUT_STATE          (PORT_BASE + 0x124)
#define CON_CFG_DRIVER                  (PORT_BASE + 0x130)
#define SAS_SSP_CON_TIMER_CFG           (PORT_BASE + 0x134)
#define SAS_SMP_CON_TIMER_CFG           (PORT_BASE + 0x138)
#define SAS_STP_CON_TIMER_CFG           (PORT_BASE + 0x13c)
#define CHL_INT0                        (PORT_BASE + 0x1b4)
#define CHL_INT0_HOTPLUG_TOUT_OFF       0
#define CHL_INT0_HOTPLUG_TOUT_MSK       (0x1 << CHL_INT0_HOTPLUG_TOUT_OFF)
#define CHL_INT0_SL_RX_BCST_ACK_OFF     1
#define CHL_INT0_SL_RX_BCST_ACK_MSK     (0x1 << CHL_INT0_SL_RX_BCST_ACK_OFF)
#define CHL_INT0_SL_PHY_ENABLE_OFF      2
#define CHL_INT0_SL_PHY_ENABLE_MSK      (0x1 << CHL_INT0_SL_PHY_ENABLE_OFF)
#define CHL_INT0_NOT_RDY_OFF            4
#define CHL_INT0_NOT_RDY_MSK            (0x1 << CHL_INT0_NOT_RDY_OFF)
#define CHL_INT0_PHY_RDY_OFF            5
#define CHL_INT0_PHY_RDY_MSK            (0x1 << CHL_INT0_PHY_RDY_OFF)
#define CHL_INT1                        (PORT_BASE + 0x1b8)
#define CHL_INT1_DMAC_TX_ECC_MB_ERR_OFF 15
#define CHL_INT1_DMAC_TX_ECC_1B_ERR_OFF 16
#define CHL_INT1_DMAC_RX_ECC_MB_ERR_OFF 17
#define CHL_INT1_DMAC_RX_ECC_1B_ERR_OFF 18
#define CHL_INT1_DMAC_TX_AXI_WR_ERR_OFF 19
#define CHL_INT1_DMAC_TX_AXI_RD_ERR_OFF 20
#define CHL_INT1_DMAC_RX_AXI_WR_ERR_OFF 21
#define CHL_INT1_DMAC_RX_AXI_RD_ERR_OFF 22
#define CHL_INT1_DMAC_TX_FIFO_ERR_OFF   23
#define CHL_INT1_DMAC_RX_FIFO_ERR_OFF   24
#define CHL_INT1_DMAC_TX_AXI_RUSER_ERR_OFF      26
#define CHL_INT1_DMAC_RX_AXI_RUSER_ERR_OFF      27
#define CHL_INT2                        (PORT_BASE + 0x1bc)
#define CHL_INT2_SL_IDAF_TOUT_CONF_OFF  0
#define CHL_INT2_RX_DISP_ERR_OFF        28
#define CHL_INT2_RX_CODE_ERR_OFF        29
#define CHL_INT2_RX_INVLD_DW_OFF        30
#define CHL_INT2_STP_LINK_TIMEOUT_OFF   31
#define CHL_INT0_MSK                    (PORT_BASE + 0x1c0)
#define CHL_INT1_MSK                    (PORT_BASE + 0x1c4)
#define CHL_INT2_MSK                    (PORT_BASE + 0x1c8)
#define SAS_EC_INT_COAL_TIME            (PORT_BASE + 0x1cc)
#define CHL_INT_COAL_EN                 (PORT_BASE + 0x1d0)
#define SAS_RX_TRAIN_TIMER              (PORT_BASE + 0x2a4)
#define PHY_CTRL_RDY_MSK                (PORT_BASE + 0x2b0)
#define PHYCTRL_NOT_RDY_MSK             (PORT_BASE + 0x2b4)
#define PHYCTRL_DWS_RESET_MSK           (PORT_BASE + 0x2b8)
#define PHYCTRL_PHY_ENA_MSK             (PORT_BASE + 0x2bc)
#define SL_RX_BCAST_CHK_MSK             (PORT_BASE + 0x2c0)
#define PHYCTRL_OOB_RESTART_MSK         (PORT_BASE + 0x2c4)
#define DMA_TX_STATUS                   (PORT_BASE + 0x2d0)
#define DMA_TX_STATUS_BUSY_OFF          0
#define DMA_TX_STATUS_BUSY_MSK          (0x1 << DMA_TX_STATUS_BUSY_OFF)
#define DMA_RX_STATUS                   (PORT_BASE + 0x2e8)
#define DMA_RX_STATUS_BUSY_OFF          0
#define DMA_RX_STATUS_BUSY_MSK          (0x1 << DMA_RX_STATUS_BUSY_OFF)

#define COARSETUNE_TIME                 (PORT_BASE + 0x304)
#define TXDEEMPH_G1                     (PORT_BASE + 0x350)
#define ERR_CNT_DWS_LOST                (PORT_BASE + 0x380)
#define ERR_CNT_RESET_PROB              (PORT_BASE + 0x384)
#define ERR_CNT_INVLD_DW                (PORT_BASE + 0x390)
#define ERR_CNT_CODE_ERR                (PORT_BASE + 0x394)
#define ERR_CNT_DISP_ERR                (PORT_BASE + 0x398)
#define DFX_FIFO_CTRL                   (PORT_BASE + 0x3a0)
#define DFX_FIFO_CTRL_TRIGGER_MODE_OFF  0
#define DFX_FIFO_CTRL_TRIGGER_MODE_MSK  (0x7 << DFX_FIFO_CTRL_TRIGGER_MODE_OFF)
#define DFX_FIFO_CTRL_DUMP_MODE_OFF     3
#define DFX_FIFO_CTRL_DUMP_MODE_MSK     (0x7 << DFX_FIFO_CTRL_DUMP_MODE_OFF)
#define DFX_FIFO_CTRL_SIGNAL_SEL_OFF    6
#define DFX_FIFO_CTRL_SIGNAL_SEL_MSK    (0xF << DFX_FIFO_CTRL_SIGNAL_SEL_OFF)
#define DFX_FIFO_CTRL_DUMP_DISABLE_OFF  10
#define DFX_FIFO_CTRL_DUMP_DISABLE_MSK  (0x1 << DFX_FIFO_CTRL_DUMP_DISABLE_OFF)
#define DFX_FIFO_TRIGGER                (PORT_BASE + 0x3a4)
#define DFX_FIFO_TRIGGER_MSK            (PORT_BASE + 0x3a8)
#define DFX_FIFO_DUMP_MSK               (PORT_BASE + 0x3aC)
#define DFX_FIFO_RD_DATA                (PORT_BASE + 0x3b0)

#define DEFAULT_ITCT_HW         2048 /* reset value, not reprogrammed */
#if (HISI_SAS_MAX_DEVICES > DEFAULT_ITCT_HW)
#error Max ITCT exceeded
#endif

#define AXI_MASTER_CFG_BASE             (0x5000)
#define AM_CTRL_GLOBAL                  (0x0)
#define AM_CTRL_SHUTDOWN_REQ_OFF        0
#define AM_CTRL_SHUTDOWN_REQ_MSK        (0x1 << AM_CTRL_SHUTDOWN_REQ_OFF)
#define AM_CURR_TRANS_RETURN    (0x150)

#define AM_CFG_MAX_TRANS                (0x5010)
#define AM_CFG_SINGLE_PORT_MAX_TRANS    (0x5014)
#define AXI_CFG                                 (0x5100)
#define AM_ROB_ECC_ERR_ADDR             (0x510c)
#define AM_ROB_ECC_ERR_ADDR_OFF 0
#define AM_ROB_ECC_ERR_ADDR_MSK 0xffffffff

/* RAS registers need init */
#define RAS_BASE                (0x6000)
#define SAS_RAS_INTR0                   (RAS_BASE)
#define SAS_RAS_INTR1                   (RAS_BASE + 0x04)
#define SAS_RAS_INTR0_MASK              (RAS_BASE + 0x08)
#define SAS_RAS_INTR1_MASK              (RAS_BASE + 0x0c)
#define CFG_SAS_RAS_INTR_MASK           (RAS_BASE + 0x1c)
#define SAS_RAS_INTR2                   (RAS_BASE + 0x20)
#define SAS_RAS_INTR2_MASK              (RAS_BASE + 0x24)

/* HW dma structures */
/* Delivery queue header */
/* dw0 */
#define CMD_HDR_ABORT_FLAG_OFF          0
#define CMD_HDR_ABORT_FLAG_MSK          (0x3 << CMD_HDR_ABORT_FLAG_OFF)
#define CMD_HDR_ABORT_DEVICE_TYPE_OFF   2
#define CMD_HDR_ABORT_DEVICE_TYPE_MSK   (0x1 << CMD_HDR_ABORT_DEVICE_TYPE_OFF)
#define CMD_HDR_RESP_REPORT_OFF         5
#define CMD_HDR_RESP_REPORT_MSK         (0x1 << CMD_HDR_RESP_REPORT_OFF)
#define CMD_HDR_TLR_CTRL_OFF            6
#define CMD_HDR_TLR_CTRL_MSK            (0x3 << CMD_HDR_TLR_CTRL_OFF)
#define CMD_HDR_PORT_OFF                18
#define CMD_HDR_PORT_MSK                (0xf << CMD_HDR_PORT_OFF)
#define CMD_HDR_PRIORITY_OFF            27
#define CMD_HDR_PRIORITY_MSK            (0x1 << CMD_HDR_PRIORITY_OFF)
#define CMD_HDR_CMD_OFF                 29
#define CMD_HDR_CMD_MSK                 (0x7 << CMD_HDR_CMD_OFF)
/* dw1 */
#define CMD_HDR_UNCON_CMD_OFF   3
#define CMD_HDR_DIR_OFF                 5
#define CMD_HDR_DIR_MSK                 (0x3 << CMD_HDR_DIR_OFF)
#define CMD_HDR_RESET_OFF               7
#define CMD_HDR_RESET_MSK               (0x1 << CMD_HDR_RESET_OFF)
#define CMD_HDR_VDTL_OFF                10
#define CMD_HDR_VDTL_MSK                (0x1 << CMD_HDR_VDTL_OFF)
#define CMD_HDR_FRAME_TYPE_OFF          11
#define CMD_HDR_FRAME_TYPE_MSK          (0x1f << CMD_HDR_FRAME_TYPE_OFF)
#define CMD_HDR_DEV_ID_OFF              16
#define CMD_HDR_DEV_ID_MSK              (0xffff << CMD_HDR_DEV_ID_OFF)
/* dw2 */
#define CMD_HDR_CFL_OFF                 0
#define CMD_HDR_CFL_MSK                 (0x1ff << CMD_HDR_CFL_OFF)
#define CMD_HDR_NCQ_TAG_OFF             10
#define CMD_HDR_NCQ_TAG_MSK             (0x1f << CMD_HDR_NCQ_TAG_OFF)
#define CMD_HDR_MRFL_OFF                15
#define CMD_HDR_MRFL_MSK                (0x1ff << CMD_HDR_MRFL_OFF)
#define CMD_HDR_SG_MOD_OFF              24
#define CMD_HDR_SG_MOD_MSK              (0x3 << CMD_HDR_SG_MOD_OFF)
/* dw3 */
#define CMD_HDR_IPTT_OFF                0
#define CMD_HDR_IPTT_MSK                (0xffff << CMD_HDR_IPTT_OFF)
/* dw6 */
#define CMD_HDR_DIF_SGL_LEN_OFF         0
#define CMD_HDR_DIF_SGL_LEN_MSK         (0xffff << CMD_HDR_DIF_SGL_LEN_OFF)
#define CMD_HDR_DATA_SGL_LEN_OFF        16
#define CMD_HDR_DATA_SGL_LEN_MSK        (0xffff << CMD_HDR_DATA_SGL_LEN_OFF)
/* dw7 */
#define CMD_HDR_ADDR_MODE_SEL_OFF               15
#define CMD_HDR_ADDR_MODE_SEL_MSK               (1 << CMD_HDR_ADDR_MODE_SEL_OFF)
#define CMD_HDR_ABORT_IPTT_OFF          16
#define CMD_HDR_ABORT_IPTT_MSK          (0xffff << CMD_HDR_ABORT_IPTT_OFF)

/* Completion header */
/* dw0 */
#define CMPLT_HDR_CMPLT_OFF             0
#define CMPLT_HDR_CMPLT_MSK             (0x3 << CMPLT_HDR_CMPLT_OFF)
#define CMPLT_HDR_ERROR_PHASE_OFF   2
#define CMPLT_HDR_ERROR_PHASE_MSK   (0xff << CMPLT_HDR_ERROR_PHASE_OFF)
#define CMPLT_HDR_RSPNS_XFRD_OFF        10
#define CMPLT_HDR_RSPNS_XFRD_MSK        (0x1 << CMPLT_HDR_RSPNS_XFRD_OFF)
#define CMPLT_HDR_ERX_OFF               12
#define CMPLT_HDR_ERX_MSK               (0x1 << CMPLT_HDR_ERX_OFF)
#define CMPLT_HDR_ABORT_STAT_OFF        13
#define CMPLT_HDR_ABORT_STAT_MSK        (0x7 << CMPLT_HDR_ABORT_STAT_OFF)
/* abort_stat */
#define STAT_IO_NOT_VALID               0x1
#define STAT_IO_NO_DEVICE               0x2
#define STAT_IO_COMPLETE                0x3
#define STAT_IO_ABORTED                 0x4
/* dw1 */
#define CMPLT_HDR_IPTT_OFF              0
#define CMPLT_HDR_IPTT_MSK              (0xffff << CMPLT_HDR_IPTT_OFF)
#define CMPLT_HDR_DEV_ID_OFF            16
#define CMPLT_HDR_DEV_ID_MSK            (0xffff << CMPLT_HDR_DEV_ID_OFF)
/* dw3 */
#define CMPLT_HDR_IO_IN_TARGET_OFF      17
#define CMPLT_HDR_IO_IN_TARGET_MSK      (0x1 << CMPLT_HDR_IO_IN_TARGET_OFF)

/* ITCT header */
/* qw0 */
#define ITCT_HDR_DEV_TYPE_OFF           0
#define ITCT_HDR_DEV_TYPE_MSK           (0x3 << ITCT_HDR_DEV_TYPE_OFF)
#define ITCT_HDR_VALID_OFF              2
#define ITCT_HDR_VALID_MSK              (0x1 << ITCT_HDR_VALID_OFF)
#define ITCT_HDR_MCR_OFF                5
#define ITCT_HDR_MCR_MSK                (0xf << ITCT_HDR_MCR_OFF)
#define ITCT_HDR_VLN_OFF                9
#define ITCT_HDR_VLN_MSK                (0xf << ITCT_HDR_VLN_OFF)
#define ITCT_HDR_SMP_TIMEOUT_OFF        16
#define ITCT_HDR_AWT_CONTINUE_OFF       25
#define ITCT_HDR_PORT_ID_OFF            28
#define ITCT_HDR_PORT_ID_MSK            (0xf << ITCT_HDR_PORT_ID_OFF)
/* qw2 */
#define ITCT_HDR_INLT_OFF               0
#define ITCT_HDR_INLT_MSK               (0xffffULL << ITCT_HDR_INLT_OFF)
#define ITCT_HDR_RTOLT_OFF              48
#define ITCT_HDR_RTOLT_MSK              (0xffffULL << ITCT_HDR_RTOLT_OFF)

struct hisi_sas_protect_iu_v3_hw {
        u32 dw0;
        u32 lbrtcv;
        u32 lbrtgv;
        u32 dw3;
        u32 dw4;
        u32 dw5;
        u32 rsv;
};

struct hisi_sas_complete_v3_hdr {
        __le32 dw0;
        __le32 dw1;
        __le32 act;
        __le32 dw3;
};

struct hisi_sas_err_record_v3 {
        /* dw0 */
        __le32 trans_tx_fail_type;

        /* dw1 */
        __le32 trans_rx_fail_type;

        /* dw2 */
        __le16 dma_tx_err_type;
        __le16 sipc_rx_err_type;

        /* dw3 */
        __le32 dma_rx_err_type;
};

#define RX_DATA_LEN_UNDERFLOW_OFF       6
#define RX_DATA_LEN_UNDERFLOW_MSK       (1 << RX_DATA_LEN_UNDERFLOW_OFF)

#define HISI_SAS_COMMAND_ENTRIES_V3_HW 4096
#define HISI_SAS_MSI_COUNT_V3_HW 32

#define DIR_NO_DATA 0
#define DIR_TO_INI 1
#define DIR_TO_DEVICE 2
#define DIR_RESERVED 3

#define FIS_CMD_IS_UNCONSTRAINED(fis) \
        ((fis.command == ATA_CMD_READ_LOG_EXT) || \
        (fis.command == ATA_CMD_READ_LOG_DMA_EXT) || \
        ((fis.command == ATA_CMD_DEV_RESET) && \
        ((fis.control & ATA_SRST) != 0)))

#define T10_INSRT_EN_OFF    0
#define T10_INSRT_EN_MSK    (1 << T10_INSRT_EN_OFF)
#define T10_RMV_EN_OFF      1
#define T10_RMV_EN_MSK      (1 << T10_RMV_EN_OFF)
#define T10_RPLC_EN_OFF     2
#define T10_RPLC_EN_MSK     (1 << T10_RPLC_EN_OFF)
#define T10_CHK_EN_OFF      3
#define T10_CHK_EN_MSK      (1 << T10_CHK_EN_OFF)
#define INCR_LBRT_OFF       5
#define INCR_LBRT_MSK       (1 << INCR_LBRT_OFF)
#define USR_DATA_BLOCK_SZ_OFF   20
#define USR_DATA_BLOCK_SZ_MSK   (0x3 << USR_DATA_BLOCK_SZ_OFF)
#define T10_CHK_MSK_OFF     16
#define T10_CHK_REF_TAG_MSK (0xf0 << T10_CHK_MSK_OFF)
#define T10_CHK_APP_TAG_MSK (0xc << T10_CHK_MSK_OFF)

#define BASE_VECTORS_V3_HW  16
#define MIN_AFFINE_VECTORS_V3_HW  (BASE_VECTORS_V3_HW + 1)

#define CHNL_INT_STS_MSK        0xeeeeeeee
#define CHNL_INT_STS_PHY_MSK    0xe
#define CHNL_INT_STS_INT0_MSK BIT(1)
#define CHNL_INT_STS_INT1_MSK BIT(2)
#define CHNL_INT_STS_INT2_MSK BIT(3)
#define CHNL_WIDTH 4

enum {
        DSM_FUNC_ERR_HANDLE_MSI = 0,
};

static bool hisi_sas_intr_conv;
MODULE_PARM_DESC(intr_conv, "interrupt converge enable (0-1)");

/* permit overriding the host protection capabilities mask (EEDP/T10 PI) */
static int prot_mask;
module_param(prot_mask, int, 0);
MODULE_PARM_DESC(prot_mask, " host protection capabilities mask, def=0x0 ");

static void debugfs_work_handler_v3_hw(struct work_struct *work);
static void debugfs_snapshot_regs_v3_hw(struct hisi_hba *hisi_hba);

static u32 hisi_sas_read32(struct hisi_hba *hisi_hba, u32 off)
{
        void __iomem *regs = hisi_hba->regs + off;

        return readl(regs);
}

static void hisi_sas_write32(struct hisi_hba *hisi_hba, u32 off, u32 val)
{
        void __iomem *regs = hisi_hba->regs + off;

        writel(val, regs);
}

static void hisi_sas_phy_write32(struct hisi_hba *hisi_hba, int phy_no,
                                 u32 off, u32 val)
{
        void __iomem *regs = hisi_hba->regs + (0x400 * phy_no) + off;

        writel(val, regs);
}

static u32 hisi_sas_phy_read32(struct hisi_hba *hisi_hba,
                                      int phy_no, u32 off)
{
        void __iomem *regs = hisi_hba->regs + (0x400 * phy_no) + off;

        return readl(regs);
}

#define hisi_sas_read32_poll_timeout(off, val, cond, delay_us,          \
                                     timeout_us)                        \
({                                                                      \
        void __iomem *regs = hisi_hba->regs + off;                      \
        readl_poll_timeout(regs, val, cond, delay_us, timeout_us);      \
})

#define hisi_sas_read32_poll_timeout_atomic(off, val, cond, delay_us,   \
                                            timeout_us)                 \
({                                                                      \
        void __iomem *regs = hisi_hba->regs + off;                      \
        readl_poll_timeout_atomic(regs, val, cond, delay_us, timeout_us);\
})

static void init_reg_v3_hw(struct hisi_hba *hisi_hba)
{
        int i, j;

        /* Global registers init */
        hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE,
                         (u32)((1ULL << hisi_hba->queue_count) - 1));
        hisi_sas_write32(hisi_hba, SAS_AXI_USER3, 0);
        hisi_sas_write32(hisi_hba, CFG_MAX_TAG, 0xfff0400);
        hisi_sas_write32(hisi_hba, HGC_SAS_TXFAIL_RETRY_CTRL, 0x108);
        hisi_sas_write32(hisi_hba, CFG_AGING_TIME, 0x1);
        hisi_sas_write32(hisi_hba, INT_COAL_EN, 0x1);
        hisi_sas_write32(hisi_hba, OQ_INT_COAL_TIME, 0x1);
        hisi_sas_write32(hisi_hba, OQ_INT_COAL_CNT, 0x1);
        hisi_sas_write32(hisi_hba, CQ_INT_CONVERGE_EN,
                         hisi_sas_intr_conv);
        hisi_sas_write32(hisi_hba, OQ_INT_SRC, 0xffff);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC1, 0xffffffff);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC2, 0xffffffff);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC3, 0xffffffff);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK1, 0xfefefefe);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK2, 0xfefefefe);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK3, 0xffc220ff);
        hisi_sas_write32(hisi_hba, CHNL_PHYUPDOWN_INT_MSK, 0x0);
        hisi_sas_write32(hisi_hba, CHNL_ENT_INT_MSK, 0x0);
        hisi_sas_write32(hisi_hba, HGC_COM_INT_MSK, 0x0);
        hisi_sas_write32(hisi_hba, SAS_ECC_INTR_MSK, 0x155555);
        hisi_sas_write32(hisi_hba, AWQOS_AWCACHE_CFG, 0xf0f0);
        hisi_sas_write32(hisi_hba, ARQOS_ARCACHE_CFG, 0xf0f0);
        for (i = 0; i < hisi_hba->queue_count; i++)
                hisi_sas_write32(hisi_hba, OQ0_INT_SRC_MSK + 0x4 * i, 0);

        hisi_sas_write32(hisi_hba, HYPER_STREAM_ID_EN_CFG, 1);

        for (i = 0; i < hisi_hba->n_phy; i++) {
                enum sas_linkrate max;
                struct hisi_sas_phy *phy = &hisi_hba->phy[i];
                struct asd_sas_phy *sas_phy = &phy->sas_phy;
                u32 prog_phy_link_rate = hisi_sas_phy_read32(hisi_hba, i,
                                                           PROG_PHY_LINK_RATE);

                prog_phy_link_rate &= ~CFG_PROG_PHY_LINK_RATE_MSK;
                if (!sas_phy->phy || (sas_phy->phy->maximum_linkrate <
                                SAS_LINK_RATE_1_5_GBPS))
                        max = SAS_LINK_RATE_12_0_GBPS;
                else
                        max = sas_phy->phy->maximum_linkrate;
                prog_phy_link_rate |= hisi_sas_get_prog_phy_linkrate_mask(max);
                hisi_sas_phy_write32(hisi_hba, i, PROG_PHY_LINK_RATE,
                        prog_phy_link_rate);
                hisi_sas_phy_write32(hisi_hba, i, SERDES_CFG, 0xffc00);
                hisi_sas_phy_write32(hisi_hba, i, SAS_RX_TRAIN_TIMER, 0x13e80);
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT0, 0xffffffff);
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT1, 0xffffffff);
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT2, 0xffffffff);
                hisi_sas_phy_write32(hisi_hba, i, RXOP_CHECK_CFG_H, 0x1000);
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT1_MSK, 0xf2057fff);
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT2_MSK, 0xffffbfe);
                hisi_sas_phy_write32(hisi_hba, i, PHY_CTRL_RDY_MSK, 0x0);
                hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_NOT_RDY_MSK, 0x0);
                hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_DWS_RESET_MSK, 0x0);
                hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_PHY_ENA_MSK, 0x0);
                hisi_sas_phy_write32(hisi_hba, i, SL_RX_BCAST_CHK_MSK, 0x0);
                hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_OOB_RESTART_MSK, 0x1);
                hisi_sas_phy_write32(hisi_hba, i, STP_LINK_TIMER, 0x7f7a120);
                hisi_sas_phy_write32(hisi_hba, i, CON_CFG_DRIVER, 0x2a0a01);
                hisi_sas_phy_write32(hisi_hba, i, SAS_SSP_CON_TIMER_CFG, 0x32);
                hisi_sas_phy_write32(hisi_hba, i, SAS_EC_INT_COAL_TIME,
                                     0x30f4240);
                /* used for 12G negotiate */
                hisi_sas_phy_write32(hisi_hba, i, COARSETUNE_TIME, 0x1e);
                hisi_sas_phy_write32(hisi_hba, i, AIP_LIMIT, 0x2ffff);

                /* get default FFE configuration for BIST */
                for (j = 0; j < FFE_CFG_MAX; j++) {
                        u32 val = hisi_sas_phy_read32(hisi_hba, i,
                                                      TXDEEMPH_G1 + (j * 0x4));
                        hisi_hba->debugfs_bist_ffe[i][j] = val;
                }
        }

        for (i = 0; i < hisi_hba->queue_count; i++) {
                /* Delivery queue */
                hisi_sas_write32(hisi_hba,
                                 DLVRY_Q_0_BASE_ADDR_HI + (i * 0x14),
                                 upper_32_bits(hisi_hba->cmd_hdr_dma[i]));

                hisi_sas_write32(hisi_hba, DLVRY_Q_0_BASE_ADDR_LO + (i * 0x14),
                                 lower_32_bits(hisi_hba->cmd_hdr_dma[i]));

                hisi_sas_write32(hisi_hba, DLVRY_Q_0_DEPTH + (i * 0x14),
                                 HISI_SAS_QUEUE_SLOTS);

                /* Completion queue */
                hisi_sas_write32(hisi_hba, COMPL_Q_0_BASE_ADDR_HI + (i * 0x14),
                                 upper_32_bits(hisi_hba->complete_hdr_dma[i]));

                hisi_sas_write32(hisi_hba, COMPL_Q_0_BASE_ADDR_LO + (i * 0x14),
                                 lower_32_bits(hisi_hba->complete_hdr_dma[i]));

                hisi_sas_write32(hisi_hba, COMPL_Q_0_DEPTH + (i * 0x14),
                                 HISI_SAS_QUEUE_SLOTS);
        }

        /* itct */
        hisi_sas_write32(hisi_hba, ITCT_BASE_ADDR_LO,
                         lower_32_bits(hisi_hba->itct_dma));

        hisi_sas_write32(hisi_hba, ITCT_BASE_ADDR_HI,
                         upper_32_bits(hisi_hba->itct_dma));

        /* iost */
        hisi_sas_write32(hisi_hba, IOST_BASE_ADDR_LO,
                         lower_32_bits(hisi_hba->iost_dma));

        hisi_sas_write32(hisi_hba, IOST_BASE_ADDR_HI,
                         upper_32_bits(hisi_hba->iost_dma));

        /* breakpoint */
        hisi_sas_write32(hisi_hba, IO_BROKEN_MSG_ADDR_LO,
                         lower_32_bits(hisi_hba->breakpoint_dma));

        hisi_sas_write32(hisi_hba, IO_BROKEN_MSG_ADDR_HI,
                         upper_32_bits(hisi_hba->breakpoint_dma));

        /* SATA broken msg */
        hisi_sas_write32(hisi_hba, IO_SATA_BROKEN_MSG_ADDR_LO,
                         lower_32_bits(hisi_hba->sata_breakpoint_dma));

        hisi_sas_write32(hisi_hba, IO_SATA_BROKEN_MSG_ADDR_HI,
                         upper_32_bits(hisi_hba->sata_breakpoint_dma));

        /* SATA initial fis */
        hisi_sas_write32(hisi_hba, SATA_INITI_D2H_STORE_ADDR_LO,
                         lower_32_bits(hisi_hba->initial_fis_dma));

        hisi_sas_write32(hisi_hba, SATA_INITI_D2H_STORE_ADDR_HI,
                         upper_32_bits(hisi_hba->initial_fis_dma));

        /* RAS registers init */
        hisi_sas_write32(hisi_hba, SAS_RAS_INTR0_MASK, 0x0);
        hisi_sas_write32(hisi_hba, SAS_RAS_INTR1_MASK, 0x0);
        hisi_sas_write32(hisi_hba, SAS_RAS_INTR2_MASK, 0x0);
        hisi_sas_write32(hisi_hba, CFG_SAS_RAS_INTR_MASK, 0x0);

        /* LED registers init */
        hisi_sas_write32(hisi_hba, SAS_CFG_DRIVE_VLD, 0x80000ff);
        hisi_sas_write32(hisi_hba, SAS_GPIO_TX_0_1, 0x80808080);
        hisi_sas_write32(hisi_hba, SAS_GPIO_TX_0_1 + 0x4, 0x80808080);
        /* Configure blink generator rate A to 1Hz and B to 4Hz */
        hisi_sas_write32(hisi_hba, SAS_GPIO_CFG_1, 0x121700);
        hisi_sas_write32(hisi_hba, SAS_GPIO_CFG_0, 0x800000);
}

static void config_phy_opt_mode_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 cfg = hisi_sas_phy_read32(hisi_hba, phy_no, PHY_CFG);

        cfg &= ~PHY_CFG_DC_OPT_MSK;
        cfg |= 1 << PHY_CFG_DC_OPT_OFF;
        hisi_sas_phy_write32(hisi_hba, phy_no, PHY_CFG, cfg);
}

static void config_id_frame_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        struct sas_identify_frame identify_frame;
        u32 *identify_buffer;

        memset(&identify_frame, 0, sizeof(identify_frame));
        identify_frame.dev_type = SAS_END_DEVICE;
        identify_frame.frame_type = 0;
        identify_frame._un1 = 1;
        identify_frame.initiator_bits = SAS_PROTOCOL_ALL;
        identify_frame.target_bits = SAS_PROTOCOL_NONE;
        memcpy(&identify_frame._un4_11[0], hisi_hba->sas_addr, SAS_ADDR_SIZE);
        memcpy(&identify_frame.sas_addr[0], hisi_hba->sas_addr, SAS_ADDR_SIZE);
        identify_frame.phy_id = phy_no;
        identify_buffer = (u32 *)(&identify_frame);

        hisi_sas_phy_write32(hisi_hba, phy_no, TX_ID_DWORD0,
                        __swab32(identify_buffer[0]));
        hisi_sas_phy_write32(hisi_hba, phy_no, TX_ID_DWORD1,
                        __swab32(identify_buffer[1]));
        hisi_sas_phy_write32(hisi_hba, phy_no, TX_ID_DWORD2,
                        __swab32(identify_buffer[2]));
        hisi_sas_phy_write32(hisi_hba, phy_no, TX_ID_DWORD3,
                        __swab32(identify_buffer[3]));
        hisi_sas_phy_write32(hisi_hba, phy_no, TX_ID_DWORD4,
                        __swab32(identify_buffer[4]));
        hisi_sas_phy_write32(hisi_hba, phy_no, TX_ID_DWORD5,
                        __swab32(identify_buffer[5]));
}

static void setup_itct_v3_hw(struct hisi_hba *hisi_hba,
                             struct hisi_sas_device *sas_dev)
{
        struct domain_device *device = sas_dev->sas_device;
        struct device *dev = hisi_hba->dev;
        u64 qw0, device_id = sas_dev->device_id;
        struct hisi_sas_itct *itct = &hisi_hba->itct[device_id];
        struct domain_device *parent_dev = device->parent;
        struct asd_sas_port *sas_port = device->port;
        struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
        u64 sas_addr;

        memset(itct, 0, sizeof(*itct));

        /* qw0 */
        qw0 = 0;
        switch (sas_dev->dev_type) {
        case SAS_END_DEVICE:
        case SAS_EDGE_EXPANDER_DEVICE:
        case SAS_FANOUT_EXPANDER_DEVICE:
                qw0 = HISI_SAS_DEV_TYPE_SSP << ITCT_HDR_DEV_TYPE_OFF;
                break;
        case SAS_SATA_DEV:
        case SAS_SATA_PENDING:
                if (parent_dev && dev_is_expander(parent_dev->dev_type))
                        qw0 = HISI_SAS_DEV_TYPE_STP << ITCT_HDR_DEV_TYPE_OFF;
                else
                        qw0 = HISI_SAS_DEV_TYPE_SATA << ITCT_HDR_DEV_TYPE_OFF;
                break;
        default:
                dev_warn(dev, "setup itct: unsupported dev type (%d)\n",
                         sas_dev->dev_type);
        }

        qw0 |= ((1 << ITCT_HDR_VALID_OFF) |
                (device->linkrate << ITCT_HDR_MCR_OFF) |
                (1 << ITCT_HDR_VLN_OFF) |
                (0xfa << ITCT_HDR_SMP_TIMEOUT_OFF) |
                (1 << ITCT_HDR_AWT_CONTINUE_OFF) |
                (port->id << ITCT_HDR_PORT_ID_OFF));
        itct->qw0 = cpu_to_le64(qw0);

        /* qw1 */
        memcpy(&sas_addr, device->sas_addr, SAS_ADDR_SIZE);
        itct->sas_addr = cpu_to_le64(__swab64(sas_addr));

        /* qw2 */
        if (!dev_is_sata(device))
                itct->qw2 = cpu_to_le64((5000ULL << ITCT_HDR_INLT_OFF) |
                                        (0x1ULL << ITCT_HDR_RTOLT_OFF));
}

static int clear_itct_v3_hw(struct hisi_hba *hisi_hba,
                            struct hisi_sas_device *sas_dev)
{
        DECLARE_COMPLETION_ONSTACK(completion);
        u64 dev_id = sas_dev->device_id;
        struct hisi_sas_itct *itct = &hisi_hba->itct[dev_id];
        u32 reg_val = hisi_sas_read32(hisi_hba, ENT_INT_SRC3);
        struct device *dev = hisi_hba->dev;

        sas_dev->completion = &completion;

        /* clear the itct interrupt state */
        if (ENT_INT_SRC3_ITC_INT_MSK & reg_val)
                hisi_sas_write32(hisi_hba, ENT_INT_SRC3,
                                 ENT_INT_SRC3_ITC_INT_MSK);

        /* clear the itct table */
        reg_val = ITCT_CLR_EN_MSK | (dev_id & ITCT_DEV_MSK);
        hisi_sas_write32(hisi_hba, ITCT_CLR, reg_val);

        if (!wait_for_completion_timeout(sas_dev->completion,
                                         HISI_SAS_CLEAR_ITCT_TIMEOUT)) {
                dev_warn(dev, "failed to clear ITCT\n");
                return -ETIMEDOUT;
        }

        memset(itct, 0, sizeof(struct hisi_sas_itct));
        return 0;
}

static void dereg_device_v3_hw(struct hisi_hba *hisi_hba,
                                struct domain_device *device)
{
        struct hisi_sas_slot *slot, *slot2;
        struct hisi_sas_device *sas_dev = device->lldd_dev;
        u32 cfg_abt_set_query_iptt;

        cfg_abt_set_query_iptt = hisi_sas_read32(hisi_hba,
                CFG_ABT_SET_QUERY_IPTT);
        list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry) {
                cfg_abt_set_query_iptt &= ~CFG_SET_ABORTED_IPTT_MSK;
                cfg_abt_set_query_iptt |= (1 << CFG_SET_ABORTED_EN_OFF) |
                        (slot->idx << CFG_SET_ABORTED_IPTT_OFF);
                hisi_sas_write32(hisi_hba, CFG_ABT_SET_QUERY_IPTT,
                        cfg_abt_set_query_iptt);
        }
        cfg_abt_set_query_iptt &= ~(1 << CFG_SET_ABORTED_EN_OFF);
        hisi_sas_write32(hisi_hba, CFG_ABT_SET_QUERY_IPTT,
                cfg_abt_set_query_iptt);
        hisi_sas_write32(hisi_hba, CFG_ABT_SET_IPTT_DONE,
                                        1 << CFG_ABT_SET_IPTT_DONE_OFF);
}

static int reset_hw_v3_hw(struct hisi_hba *hisi_hba)
{
        struct device *dev = hisi_hba->dev;
        int ret;
        u32 val;

        hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0);

        /* Disable all of the PHYs */
        hisi_sas_stop_phys(hisi_hba);
        udelay(50);

        /* Ensure axi bus idle */
        ret = hisi_sas_read32_poll_timeout(AXI_CFG, val, !val,
                                           20000, 1000000);
        if (ret) {
                dev_err(dev, "axi bus is not idle, ret = %d!\n", ret);
                return -EIO;
        }

        if (ACPI_HANDLE(dev)) {
                acpi_status s;

                s = acpi_evaluate_object(ACPI_HANDLE(dev), "_RST", NULL, NULL);
                if (ACPI_FAILURE(s)) {
                        dev_err(dev, "Reset failed\n");
                        return -EIO;
                }
        } else {
                dev_err(dev, "no reset method!\n");
                return -EINVAL;
        }

        return 0;
}

static int hw_init_v3_hw(struct hisi_hba *hisi_hba)
{
        struct device *dev = hisi_hba->dev;
        struct acpi_device *acpi_dev;
        union acpi_object *obj;
        guid_t guid;
        int rc;

        rc = reset_hw_v3_hw(hisi_hba);
        if (rc) {
                dev_err(dev, "hisi_sas_reset_hw failed, rc=%d\n", rc);
                return rc;
        }

        msleep(100);
        init_reg_v3_hw(hisi_hba);

        if (guid_parse("D5918B4B-37AE-4E10-A99F-E5E8A6EF4C1F", &guid)) {
                dev_err(dev, "Parse GUID failed\n");
                return -EINVAL;
        }

        /*
         * This DSM handles some hardware-related configurations:
         * 1. Switch over to MSI error handling in kernel
         * 2. BIOS *may* reset some register values through this method
         */
        obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &guid, 0,
                                DSM_FUNC_ERR_HANDLE_MSI, NULL);
        if (!obj)
                dev_warn(dev, "can not find DSM method, ignore\n");
        else
                ACPI_FREE(obj);

        acpi_dev = ACPI_COMPANION(dev);
        if (!acpi_device_power_manageable(acpi_dev))
                dev_notice(dev, "neither _PS0 nor _PR0 is defined\n");
        return 0;
}

static void enable_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 cfg = hisi_sas_phy_read32(hisi_hba, phy_no, PHY_CFG);

        cfg |= PHY_CFG_ENA_MSK;
        cfg &= ~PHY_CFG_PHY_RST_MSK;
        hisi_sas_phy_write32(hisi_hba, phy_no, PHY_CFG, cfg);
}

static void disable_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 cfg = hisi_sas_phy_read32(hisi_hba, phy_no, PHY_CFG);
        u32 irq_msk = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT2_MSK);
        static const u32 msk = BIT(CHL_INT2_RX_DISP_ERR_OFF) |
                               BIT(CHL_INT2_RX_CODE_ERR_OFF) |
                               BIT(CHL_INT2_RX_INVLD_DW_OFF);
        u32 state;

        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT2_MSK, msk | irq_msk);

        cfg &= ~PHY_CFG_ENA_MSK;
        hisi_sas_phy_write32(hisi_hba, phy_no, PHY_CFG, cfg);

        mdelay(50);

        state = hisi_sas_read32(hisi_hba, PHY_STATE);
        if (state & BIT(phy_no)) {
                cfg |= PHY_CFG_PHY_RST_MSK;
                hisi_sas_phy_write32(hisi_hba, phy_no, PHY_CFG, cfg);
        }

        udelay(1);

        hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_INVLD_DW);
        hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_DISP_ERR);
        hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_CODE_ERR);

        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT2, msk);
        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT2_MSK, irq_msk);
}

static void start_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        config_id_frame_v3_hw(hisi_hba, phy_no);
        config_phy_opt_mode_v3_hw(hisi_hba, phy_no);
        enable_phy_v3_hw(hisi_hba, phy_no);
}

static void phy_hard_reset_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        u32 txid_auto;

        hisi_sas_phy_enable(hisi_hba, phy_no, 0);
        if (phy->identify.device_type == SAS_END_DEVICE) {
                txid_auto = hisi_sas_phy_read32(hisi_hba, phy_no, TXID_AUTO);
                hisi_sas_phy_write32(hisi_hba, phy_no, TXID_AUTO,
                                        txid_auto | TX_HARDRST_MSK);
        }
        msleep(100);
        hisi_sas_phy_enable(hisi_hba, phy_no, 1);
}

static enum sas_linkrate phy_get_max_linkrate_v3_hw(void)
{
        return SAS_LINK_RATE_12_0_GBPS;
}

static void phys_init_v3_hw(struct hisi_hba *hisi_hba)
{
        int i;

        for (i = 0; i < hisi_hba->n_phy; i++) {
                struct hisi_sas_phy *phy = &hisi_hba->phy[i];
                struct asd_sas_phy *sas_phy = &phy->sas_phy;

                if (!sas_phy->phy->enabled)
                        continue;

                hisi_sas_phy_enable(hisi_hba, i, 1);
        }
}

static void sl_notify_ssp_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 sl_control;

        sl_control = hisi_sas_phy_read32(hisi_hba, phy_no, SL_CONTROL);
        sl_control |= SL_CONTROL_NOTIFY_EN_MSK;
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL, sl_control);
        msleep(1);
        sl_control = hisi_sas_phy_read32(hisi_hba, phy_no, SL_CONTROL);
        sl_control &= ~SL_CONTROL_NOTIFY_EN_MSK;
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL, sl_control);
}

static int get_wideport_bitmap_v3_hw(struct hisi_hba *hisi_hba, int port_id)
{
        int i, bitmap = 0;
        u32 phy_port_num_ma = hisi_sas_read32(hisi_hba, PHY_PORT_NUM_MA);
        u32 phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);

        for (i = 0; i < hisi_hba->n_phy; i++)
                if (phy_state & BIT(i))
                        if (((phy_port_num_ma >> (i * 4)) & 0xf) == port_id)
                                bitmap |= BIT(i);

        return bitmap;
}

static void start_delivery_v3_hw(struct hisi_sas_dq *dq)
{
        struct hisi_hba *hisi_hba = dq->hisi_hba;
        struct hisi_sas_slot *s, *s1, *s2 = NULL;
        int dlvry_queue = dq->id;
        int wp;

        list_for_each_entry_safe(s, s1, &dq->list, delivery) {
                if (!s->ready)
                        break;
                s2 = s;
                list_del(&s->delivery);
        }

        if (!s2)
                return;

        /*
         * Ensure that memories for slots built on other CPUs is observed.
         */
        smp_rmb();
        wp = (s2->dlvry_queue_slot + 1) % HISI_SAS_QUEUE_SLOTS;

        hisi_sas_write32(hisi_hba, DLVRY_Q_0_WR_PTR + (dlvry_queue * 0x14), wp);
}

static void prep_prd_sge_v3_hw(struct hisi_hba *hisi_hba,
                              struct hisi_sas_slot *slot,
                              struct hisi_sas_cmd_hdr *hdr,
                              struct scatterlist *scatter,
                              int n_elem)
{
        struct hisi_sas_sge_page *sge_page = hisi_sas_sge_addr_mem(slot);
        struct scatterlist *sg;
        int i;

        for_each_sg(scatter, sg, n_elem, i) {
                struct hisi_sas_sge *entry = &sge_page->sge[i];

                entry->addr = cpu_to_le64(sg_dma_address(sg));
                entry->page_ctrl_0 = entry->page_ctrl_1 = 0;
                entry->data_len = cpu_to_le32(sg_dma_len(sg));
                entry->data_off = 0;
        }

        hdr->prd_table_addr = cpu_to_le64(hisi_sas_sge_addr_dma(slot));

        hdr->sg_len |= cpu_to_le32(n_elem << CMD_HDR_DATA_SGL_LEN_OFF);
}

static void prep_prd_sge_dif_v3_hw(struct hisi_hba *hisi_hba,
                                   struct hisi_sas_slot *slot,
                                   struct hisi_sas_cmd_hdr *hdr,
                                   struct scatterlist *scatter,
                                   int n_elem)
{
        struct hisi_sas_sge_dif_page *sge_dif_page;
        struct scatterlist *sg;
        int i;

        sge_dif_page = hisi_sas_sge_dif_addr_mem(slot);

        for_each_sg(scatter, sg, n_elem, i) {
                struct hisi_sas_sge *entry = &sge_dif_page->sge[i];

                entry->addr = cpu_to_le64(sg_dma_address(sg));
                entry->page_ctrl_0 = 0;
                entry->page_ctrl_1 = 0;
                entry->data_len = cpu_to_le32(sg_dma_len(sg));
                entry->data_off = 0;
        }

        hdr->dif_prd_table_addr =
                cpu_to_le64(hisi_sas_sge_dif_addr_dma(slot));

        hdr->sg_len |= cpu_to_le32(n_elem << CMD_HDR_DIF_SGL_LEN_OFF);
}

static u32 get_prot_chk_msk_v3_hw(struct scsi_cmnd *scsi_cmnd)
{
        unsigned char prot_flags = scsi_cmnd->prot_flags;

        if (prot_flags & SCSI_PROT_REF_CHECK)
                return T10_CHK_APP_TAG_MSK;
        return T10_CHK_REF_TAG_MSK | T10_CHK_APP_TAG_MSK;
}

static void fill_prot_v3_hw(struct scsi_cmnd *scsi_cmnd,
                            struct hisi_sas_protect_iu_v3_hw *prot)
{
        unsigned char prot_op = scsi_get_prot_op(scsi_cmnd);
        unsigned int interval = scsi_prot_interval(scsi_cmnd);
        u32 lbrt_chk_val = t10_pi_ref_tag(scsi_cmnd->request);

        switch (prot_op) {
        case SCSI_PROT_READ_INSERT:
                prot->dw0 |= T10_INSRT_EN_MSK;
                prot->lbrtgv = lbrt_chk_val;
                break;
        case SCSI_PROT_READ_STRIP:
                prot->dw0 |= (T10_RMV_EN_MSK | T10_CHK_EN_MSK);
                prot->lbrtcv = lbrt_chk_val;
                prot->dw4 |= get_prot_chk_msk_v3_hw(scsi_cmnd);
                break;
        case SCSI_PROT_READ_PASS:
                prot->dw0 |= T10_CHK_EN_MSK;
                prot->lbrtcv = lbrt_chk_val;
                prot->dw4 |= get_prot_chk_msk_v3_hw(scsi_cmnd);
                break;
        case SCSI_PROT_WRITE_INSERT:
                prot->dw0 |= T10_INSRT_EN_MSK;
                prot->lbrtgv = lbrt_chk_val;
                break;
        case SCSI_PROT_WRITE_STRIP:
                prot->dw0 |= (T10_RMV_EN_MSK | T10_CHK_EN_MSK);
                prot->lbrtcv = lbrt_chk_val;
                break;
        case SCSI_PROT_WRITE_PASS:
                prot->dw0 |= T10_CHK_EN_MSK;
                prot->lbrtcv = lbrt_chk_val;
                prot->dw4 |= get_prot_chk_msk_v3_hw(scsi_cmnd);
                break;
        default:
                WARN(1, "prot_op(0x%x) is not valid\n", prot_op);
                break;
        }

        switch (interval) {
        case 512:
                break;
        case 4096:
                prot->dw0 |= (0x1 << USR_DATA_BLOCK_SZ_OFF);
                break;
        case 520:
                prot->dw0 |= (0x2 << USR_DATA_BLOCK_SZ_OFF);
                break;
        default:
                WARN(1, "protection interval (0x%x) invalid\n",
                     interval);
                break;
        }

        prot->dw0 |= INCR_LBRT_MSK;
}

static void prep_ssp_v3_hw(struct hisi_hba *hisi_hba,
                          struct hisi_sas_slot *slot)
{
        struct sas_task *task = slot->task;
        struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
        struct domain_device *device = task->dev;
        struct hisi_sas_device *sas_dev = device->lldd_dev;
        struct hisi_sas_port *port = slot->port;
        struct sas_ssp_task *ssp_task = &task->ssp_task;
        struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
        struct hisi_sas_tmf_task *tmf = slot->tmf;
        int has_data = 0, priority = !!tmf;
        unsigned char prot_op;
        u8 *buf_cmd;
        u32 dw1 = 0, dw2 = 0, len = 0;

        hdr->dw0 = cpu_to_le32((1 << CMD_HDR_RESP_REPORT_OFF) |
                               (2 << CMD_HDR_TLR_CTRL_OFF) |
                               (port->id << CMD_HDR_PORT_OFF) |
                               (priority << CMD_HDR_PRIORITY_OFF) |
                               (1 << CMD_HDR_CMD_OFF)); /* ssp */

        dw1 = 1 << CMD_HDR_VDTL_OFF;
        if (tmf) {
                dw1 |= 2 << CMD_HDR_FRAME_TYPE_OFF;
                dw1 |= DIR_NO_DATA << CMD_HDR_DIR_OFF;
        } else {
                prot_op = scsi_get_prot_op(scsi_cmnd);
                dw1 |= 1 << CMD_HDR_FRAME_TYPE_OFF;
                switch (scsi_cmnd->sc_data_direction) {
                case DMA_TO_DEVICE:
                        has_data = 1;
                        dw1 |= DIR_TO_DEVICE << CMD_HDR_DIR_OFF;
                        break;
                case DMA_FROM_DEVICE:
                        has_data = 1;
                        dw1 |= DIR_TO_INI << CMD_HDR_DIR_OFF;
                        break;
                default:
                        dw1 &= ~CMD_HDR_DIR_MSK;
                }
        }

        /* map itct entry */
        dw1 |= sas_dev->device_id << CMD_HDR_DEV_ID_OFF;

        dw2 = (((sizeof(struct ssp_command_iu) + sizeof(struct ssp_frame_hdr)
              + 3) / 4) << CMD_HDR_CFL_OFF) |
              ((HISI_SAS_MAX_SSP_RESP_SZ / 4) << CMD_HDR_MRFL_OFF) |
              (2 << CMD_HDR_SG_MOD_OFF);
        hdr->dw2 = cpu_to_le32(dw2);
        hdr->transfer_tags = cpu_to_le32(slot->idx);

        if (has_data) {
                prep_prd_sge_v3_hw(hisi_hba, slot, hdr, task->scatter,
                                   slot->n_elem);

                if (scsi_prot_sg_count(scsi_cmnd))
                        prep_prd_sge_dif_v3_hw(hisi_hba, slot, hdr,
                                               scsi_prot_sglist(scsi_cmnd),
                                               slot->n_elem_dif);
        }

        hdr->cmd_table_addr = cpu_to_le64(hisi_sas_cmd_hdr_addr_dma(slot));
        hdr->sts_buffer_addr = cpu_to_le64(hisi_sas_status_buf_addr_dma(slot));

        buf_cmd = hisi_sas_cmd_hdr_addr_mem(slot) +
                sizeof(struct ssp_frame_hdr);

        memcpy(buf_cmd, &task->ssp_task.LUN, 8);
        if (!tmf) {
                buf_cmd[9] = ssp_task->task_attr | (ssp_task->task_prio << 3);
                memcpy(buf_cmd + 12, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
        } else {
                buf_cmd[10] = tmf->tmf;
                switch (tmf->tmf) {
                case TMF_ABORT_TASK:
                case TMF_QUERY_TASK:
                        buf_cmd[12] =
                                (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
                        buf_cmd[13] =
                                tmf->tag_of_task_to_be_managed & 0xff;
                        break;
                default:
                        break;
                }
        }

        if (has_data && (prot_op != SCSI_PROT_NORMAL)) {
                struct hisi_sas_protect_iu_v3_hw prot;
                u8 *buf_cmd_prot;

                hdr->dw7 |= cpu_to_le32(1 << CMD_HDR_ADDR_MODE_SEL_OFF);
                dw1 |= CMD_HDR_PIR_MSK;
                buf_cmd_prot = hisi_sas_cmd_hdr_addr_mem(slot) +
                               sizeof(struct ssp_frame_hdr) +
                               sizeof(struct ssp_command_iu);

                memset(&prot, 0, sizeof(struct hisi_sas_protect_iu_v3_hw));
                fill_prot_v3_hw(scsi_cmnd, &prot);
                memcpy(buf_cmd_prot, &prot,
                       sizeof(struct hisi_sas_protect_iu_v3_hw));
                /*
                 * For READ, we need length of info read to memory, while for
                 * WRITE we need length of data written to the disk.
                 */
                if (prot_op == SCSI_PROT_WRITE_INSERT ||
                    prot_op == SCSI_PROT_READ_INSERT ||
                    prot_op == SCSI_PROT_WRITE_PASS ||
                    prot_op == SCSI_PROT_READ_PASS) {
                        unsigned int interval = scsi_prot_interval(scsi_cmnd);
                        unsigned int ilog2_interval = ilog2(interval);

                        len = (task->total_xfer_len >> ilog2_interval) * 8;
                }
        }

        hdr->dw1 = cpu_to_le32(dw1);

        hdr->data_transfer_len = cpu_to_le32(task->total_xfer_len + len);
}

static void prep_smp_v3_hw(struct hisi_hba *hisi_hba,
                          struct hisi_sas_slot *slot)
{
        struct sas_task *task = slot->task;
        struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
        struct domain_device *device = task->dev;
        struct hisi_sas_port *port = slot->port;
        struct scatterlist *sg_req;
        struct hisi_sas_device *sas_dev = device->lldd_dev;
        dma_addr_t req_dma_addr;
        unsigned int req_len;

        /* req */
        sg_req = &task->smp_task.smp_req;
        req_len = sg_dma_len(sg_req);
        req_dma_addr = sg_dma_address(sg_req);

        /* create header */
        /* dw0 */
        hdr->dw0 = cpu_to_le32((port->id << CMD_HDR_PORT_OFF) |
                               (1 << CMD_HDR_PRIORITY_OFF) | /* high pri */
                               (2 << CMD_HDR_CMD_OFF)); /* smp */

        /* map itct entry */
        hdr->dw1 = cpu_to_le32((sas_dev->device_id << CMD_HDR_DEV_ID_OFF) |
                               (1 << CMD_HDR_FRAME_TYPE_OFF) |
                               (DIR_NO_DATA << CMD_HDR_DIR_OFF));

        /* dw2 */
        hdr->dw2 = cpu_to_le32((((req_len - 4) / 4) << CMD_HDR_CFL_OFF) |
                               (HISI_SAS_MAX_SMP_RESP_SZ / 4 <<
                               CMD_HDR_MRFL_OFF));

        hdr->transfer_tags = cpu_to_le32(slot->idx << CMD_HDR_IPTT_OFF);

        hdr->cmd_table_addr = cpu_to_le64(req_dma_addr);
        hdr->sts_buffer_addr = cpu_to_le64(hisi_sas_status_buf_addr_dma(slot));
}

static void prep_ata_v3_hw(struct hisi_hba *hisi_hba,
                          struct hisi_sas_slot *slot)
{
        struct sas_task *task = slot->task;
        struct domain_device *device = task->dev;
        struct domain_device *parent_dev = device->parent;
        struct hisi_sas_device *sas_dev = device->lldd_dev;
        struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
        struct asd_sas_port *sas_port = device->port;
        struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
        u8 *buf_cmd;
        int has_data = 0, hdr_tag = 0;
        u32 dw1 = 0, dw2 = 0;

        hdr->dw0 = cpu_to_le32(port->id << CMD_HDR_PORT_OFF);
        if (parent_dev && dev_is_expander(parent_dev->dev_type))
                hdr->dw0 |= cpu_to_le32(3 << CMD_HDR_CMD_OFF);
        else
                hdr->dw0 |= cpu_to_le32(4U << CMD_HDR_CMD_OFF);

        switch (task->data_dir) {
        case DMA_TO_DEVICE:
                has_data = 1;
                dw1 |= DIR_TO_DEVICE << CMD_HDR_DIR_OFF;
                break;
        case DMA_FROM_DEVICE:
                has_data = 1;
                dw1 |= DIR_TO_INI << CMD_HDR_DIR_OFF;
                break;
        default:
                dw1 &= ~CMD_HDR_DIR_MSK;
        }

        if ((task->ata_task.fis.command == ATA_CMD_DEV_RESET) &&
                        (task->ata_task.fis.control & ATA_SRST))
                dw1 |= 1 << CMD_HDR_RESET_OFF;

        dw1 |= (hisi_sas_get_ata_protocol(
                &task->ata_task.fis, task->data_dir))
                << CMD_HDR_FRAME_TYPE_OFF;
        dw1 |= sas_dev->device_id << CMD_HDR_DEV_ID_OFF;

        if (FIS_CMD_IS_UNCONSTRAINED(task->ata_task.fis))
                dw1 |= 1 << CMD_HDR_UNCON_CMD_OFF;

        hdr->dw1 = cpu_to_le32(dw1);

        /* dw2 */
        if (task->ata_task.use_ncq) {
                struct ata_queued_cmd *qc = task->uldd_task;

                hdr_tag = qc->tag;
                task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
                dw2 |= hdr_tag << CMD_HDR_NCQ_TAG_OFF;
        }

        dw2 |= (HISI_SAS_MAX_STP_RESP_SZ / 4) << CMD_HDR_CFL_OFF |
                        2 << CMD_HDR_SG_MOD_OFF;
        hdr->dw2 = cpu_to_le32(dw2);

        /* dw3 */
        hdr->transfer_tags = cpu_to_le32(slot->idx);

        if (has_data)
                prep_prd_sge_v3_hw(hisi_hba, slot, hdr, task->scatter,
                                        slot->n_elem);

        hdr->data_transfer_len = cpu_to_le32(task->total_xfer_len);
        hdr->cmd_table_addr = cpu_to_le64(hisi_sas_cmd_hdr_addr_dma(slot));
        hdr->sts_buffer_addr = cpu_to_le64(hisi_sas_status_buf_addr_dma(slot));

        buf_cmd = hisi_sas_cmd_hdr_addr_mem(slot);

        if (likely(!task->ata_task.device_control_reg_update))
                task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
        /* fill in command FIS */
        memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
}

static void prep_abort_v3_hw(struct hisi_hba *hisi_hba,
                struct hisi_sas_slot *slot,
                int device_id, int abort_flag, int tag_to_abort)
{
        struct sas_task *task = slot->task;
        struct domain_device *dev = task->dev;
        struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
        struct hisi_sas_port *port = slot->port;

        /* dw0 */
        hdr->dw0 = cpu_to_le32((5U << CMD_HDR_CMD_OFF) | /*abort*/
                               (port->id << CMD_HDR_PORT_OFF) |
                                   (dev_is_sata(dev)
                                        << CMD_HDR_ABORT_DEVICE_TYPE_OFF) |
                                        (abort_flag
                                         << CMD_HDR_ABORT_FLAG_OFF));

        /* dw1 */
        hdr->dw1 = cpu_to_le32(device_id
                        << CMD_HDR_DEV_ID_OFF);

        /* dw7 */
        hdr->dw7 = cpu_to_le32(tag_to_abort << CMD_HDR_ABORT_IPTT_OFF);
        hdr->transfer_tags = cpu_to_le32(slot->idx);
}

static irqreturn_t phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
{
        int i;
        irqreturn_t res;
        u32 context, port_id, link_rate;
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        struct asd_sas_phy *sas_phy = &phy->sas_phy;
        struct device *dev = hisi_hba->dev;
        unsigned long flags;

        del_timer(&phy->timer);
        hisi_sas_phy_write32(hisi_hba, phy_no, PHYCTRL_PHY_ENA_MSK, 1);

        port_id = hisi_sas_read32(hisi_hba, PHY_PORT_NUM_MA);
        port_id = (port_id >> (4 * phy_no)) & 0xf;
        link_rate = hisi_sas_read32(hisi_hba, PHY_CONN_RATE);
        link_rate = (link_rate >> (phy_no * 4)) & 0xf;

        if (port_id == 0xf) {
                dev_err(dev, "phyup: phy%d invalid portid\n", phy_no);
                res = IRQ_NONE;
                goto end;
        }
        sas_phy->linkrate = link_rate;
        phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);

        /* Check for SATA dev */
        context = hisi_sas_read32(hisi_hba, PHY_CONTEXT);
        if (context & (1 << phy_no)) {
                struct hisi_sas_initial_fis *initial_fis;
                struct dev_to_host_fis *fis;
                u8 attached_sas_addr[SAS_ADDR_SIZE] = {0};
                struct Scsi_Host *shost = hisi_hba->shost;

                dev_info(dev, "phyup: phy%d link_rate=%d(sata)\n", phy_no, link_rate);
                initial_fis = &hisi_hba->initial_fis[phy_no];
                fis = &initial_fis->fis;

                /* check ERR bit of Status Register */
                if (fis->status & ATA_ERR) {
                        dev_warn(dev, "sata int: phy%d FIS status: 0x%x\n",
                                 phy_no, fis->status);
                        hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
                        res = IRQ_NONE;
                        goto end;
                }

                sas_phy->oob_mode = SATA_OOB_MODE;
                attached_sas_addr[0] = 0x50;
                attached_sas_addr[6] = shost->host_no;
                attached_sas_addr[7] = phy_no;
                memcpy(sas_phy->attached_sas_addr,
                       attached_sas_addr,
                       SAS_ADDR_SIZE);
                memcpy(sas_phy->frame_rcvd, fis,
                       sizeof(struct dev_to_host_fis));
                phy->phy_type |= PORT_TYPE_SATA;
                phy->identify.device_type = SAS_SATA_DEV;
                phy->frame_rcvd_size = sizeof(struct dev_to_host_fis);
                phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
        } else {
                u32 *frame_rcvd = (u32 *)sas_phy->frame_rcvd;
                struct sas_identify_frame *id =
                        (struct sas_identify_frame *)frame_rcvd;

                dev_info(dev, "phyup: phy%d link_rate=%d\n", phy_no, link_rate);
                for (i = 0; i < 6; i++) {
                        u32 idaf = hisi_sas_phy_read32(hisi_hba, phy_no,
                                               RX_IDAF_DWORD0 + (i * 4));
                        frame_rcvd[i] = __swab32(idaf);
                }
                sas_phy->oob_mode = SAS_OOB_MODE;
                memcpy(sas_phy->attached_sas_addr,
                       &id->sas_addr,
                       SAS_ADDR_SIZE);
                phy->phy_type |= PORT_TYPE_SAS;
                phy->identify.device_type = id->dev_type;
                phy->frame_rcvd_size = sizeof(struct sas_identify_frame);
                if (phy->identify.device_type == SAS_END_DEVICE)
                        phy->identify.target_port_protocols =
                                SAS_PROTOCOL_SSP;
                else if (phy->identify.device_type != SAS_PHY_UNUSED)
                        phy->identify.target_port_protocols =
                                SAS_PROTOCOL_SMP;
        }

        phy->port_id = port_id;
        phy->phy_attached = 1;
        hisi_sas_notify_phy_event(phy, HISI_PHYE_PHY_UP);
        res = IRQ_HANDLED;
        spin_lock_irqsave(&phy->lock, flags);
        if (phy->reset_completion) {
                phy->in_reset = 0;
                complete(phy->reset_completion);
        }
        spin_unlock_irqrestore(&phy->lock, flags);
end:
        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
                             CHL_INT0_SL_PHY_ENABLE_MSK);
        hisi_sas_phy_write32(hisi_hba, phy_no, PHYCTRL_PHY_ENA_MSK, 0);

        return res;
}

static irqreturn_t phy_down_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
{
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        u32 phy_state, sl_ctrl, txid_auto;
        struct device *dev = hisi_hba->dev;

        atomic_inc(&phy->down_cnt);

        del_timer(&phy->timer);
        hisi_sas_phy_write32(hisi_hba, phy_no, PHYCTRL_NOT_RDY_MSK, 1);

        phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);
        dev_info(dev, "phydown: phy%d phy_state=0x%x\n", phy_no, phy_state);
        hisi_sas_phy_down(hisi_hba, phy_no, (phy_state & 1 << phy_no) ? 1 : 0,
                          GFP_ATOMIC);

        sl_ctrl = hisi_sas_phy_read32(hisi_hba, phy_no, SL_CONTROL);
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL,
                                                sl_ctrl&(~SL_CTA_MSK));

        txid_auto = hisi_sas_phy_read32(hisi_hba, phy_no, TXID_AUTO);
        hisi_sas_phy_write32(hisi_hba, phy_no, TXID_AUTO,
                                                txid_auto | CT3_MSK);

        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0, CHL_INT0_NOT_RDY_MSK);
        hisi_sas_phy_write32(hisi_hba, phy_no, PHYCTRL_NOT_RDY_MSK, 0);

        return IRQ_HANDLED;
}

static irqreturn_t phy_bcast_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
{
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        struct asd_sas_phy *sas_phy = &phy->sas_phy;
        u32 bcast_status;

        hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 1);
        bcast_status = hisi_sas_phy_read32(hisi_hba, phy_no, RX_PRIMS_STATUS);
        if ((bcast_status & RX_BCAST_CHG_MSK) &&
            !test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
                sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD,
                                      GFP_ATOMIC);
        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
                             CHL_INT0_SL_RX_BCST_ACK_MSK);
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 0);

        return IRQ_HANDLED;
}

static irqreturn_t int_phy_up_down_bcast_v3_hw(int irq_no, void *p)
{
        struct hisi_hba *hisi_hba = p;
        u32 irq_msk;
        int phy_no = 0;
        irqreturn_t res = IRQ_NONE;

        irq_msk = hisi_sas_read32(hisi_hba, CHNL_INT_STATUS)
                                & 0x11111111;
        while (irq_msk) {
                if (irq_msk  & 1) {
                        u32 irq_value = hisi_sas_phy_read32(hisi_hba, phy_no,
                                                            CHL_INT0);
                        u32 phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);
                        int rdy = phy_state & (1 << phy_no);

                        if (rdy) {
                                if (irq_value & CHL_INT0_SL_PHY_ENABLE_MSK)
                                        /* phy up */
                                        if (phy_up_v3_hw(phy_no, hisi_hba)
                                                        == IRQ_HANDLED)
                                                res = IRQ_HANDLED;
                                if (irq_value & CHL_INT0_SL_RX_BCST_ACK_MSK)
                                        /* phy bcast */
                                        if (phy_bcast_v3_hw(phy_no, hisi_hba)
                                                        == IRQ_HANDLED)
                                                res = IRQ_HANDLED;
                        } else {
                                if (irq_value & CHL_INT0_NOT_RDY_MSK)
                                        /* phy down */
                                        if (phy_down_v3_hw(phy_no, hisi_hba)
                                                        == IRQ_HANDLED)
                                                res = IRQ_HANDLED;
                        }
                }
                irq_msk >>= 4;
                phy_no++;
        }

        return res;
}

static const struct hisi_sas_hw_error port_axi_error[] = {
        {
                .irq_msk = BIT(CHL_INT1_DMAC_TX_ECC_MB_ERR_OFF),
                .msg = "dmac_tx_ecc_bad_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_RX_ECC_MB_ERR_OFF),
                .msg = "dmac_rx_ecc_bad_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_TX_AXI_WR_ERR_OFF),
                .msg = "dma_tx_axi_wr_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_TX_AXI_RD_ERR_OFF),
                .msg = "dma_tx_axi_rd_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_RX_AXI_WR_ERR_OFF),
                .msg = "dma_rx_axi_wr_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_RX_AXI_RD_ERR_OFF),
                .msg = "dma_rx_axi_rd_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_TX_FIFO_ERR_OFF),
                .msg = "dma_tx_fifo_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_RX_FIFO_ERR_OFF),
                .msg = "dma_rx_fifo_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_TX_AXI_RUSER_ERR_OFF),
                .msg = "dma_tx_axi_ruser_err",
        },
        {
                .irq_msk = BIT(CHL_INT1_DMAC_RX_AXI_RUSER_ERR_OFF),
                .msg = "dma_rx_axi_ruser_err",
        },
};

static void handle_chl_int1_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 irq_value = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT1);
        u32 irq_msk = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT1_MSK);
        struct device *dev = hisi_hba->dev;
        int i;

        irq_value &= ~irq_msk;
        if (!irq_value) {
                dev_warn(dev, "phy%d channel int 1 received with status bits cleared\n",
                         phy_no);
                return;
        }

        for (i = 0; i < ARRAY_SIZE(port_axi_error); i++) {
                const struct hisi_sas_hw_error *error = &port_axi_error[i];

                if (!(irq_value & error->irq_msk))
                        continue;

                dev_err(dev, "%s error (phy%d 0x%x) found!\n",
                        error->msg, phy_no, irq_value);
                queue_work(hisi_hba->wq, &hisi_hba->rst_work);
        }

        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT1, irq_value);
}

static void phy_get_events_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        struct asd_sas_phy *sas_phy = &phy->sas_phy;
        struct sas_phy *sphy = sas_phy->phy;
        unsigned long flags;
        u32 reg_value;

        spin_lock_irqsave(&phy->lock, flags);

        /* loss dword sync */
        reg_value = hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_DWS_LOST);
        sphy->loss_of_dword_sync_count += reg_value;

        /* phy reset problem */
        reg_value = hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_RESET_PROB);
        sphy->phy_reset_problem_count += reg_value;

        /* invalid dword */
        reg_value = hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_INVLD_DW);
        sphy->invalid_dword_count += reg_value;

        /* disparity err */
        reg_value = hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_DISP_ERR);
        sphy->running_disparity_error_count += reg_value;

        /* code violation error */
        reg_value = hisi_sas_phy_read32(hisi_hba, phy_no, ERR_CNT_CODE_ERR);
        phy->code_violation_err_count += reg_value;

        spin_unlock_irqrestore(&phy->lock, flags);
}

static void handle_chl_int2_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 irq_msk = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT2_MSK);
        u32 irq_value = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT2);
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        struct pci_dev *pci_dev = hisi_hba->pci_dev;
        struct device *dev = hisi_hba->dev;
        static const u32 msk = BIT(CHL_INT2_RX_DISP_ERR_OFF) |
                        BIT(CHL_INT2_RX_CODE_ERR_OFF) |
                        BIT(CHL_INT2_RX_INVLD_DW_OFF);

        irq_value &= ~irq_msk;
        if (!irq_value) {
                dev_warn(dev, "phy%d channel int 2 received with status bits cleared\n",
                         phy_no);
                return;
        }

        if (irq_value & BIT(CHL_INT2_SL_IDAF_TOUT_CONF_OFF)) {
                dev_warn(dev, "phy%d identify timeout\n", phy_no);
                hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
        }

        if (irq_value & BIT(CHL_INT2_STP_LINK_TIMEOUT_OFF)) {
                u32 reg_value = hisi_sas_phy_read32(hisi_hba, phy_no,
                                STP_LINK_TIMEOUT_STATE);

                dev_warn(dev, "phy%d stp link timeout (0x%x)\n",
                         phy_no, reg_value);
                if (reg_value & BIT(4))
                        hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
        }

        if (pci_dev->revision > 0x20 && (irq_value & msk)) {
                struct asd_sas_phy *sas_phy = &phy->sas_phy;
                struct sas_phy *sphy = sas_phy->phy;

                phy_get_events_v3_hw(hisi_hba, phy_no);

                if (irq_value & BIT(CHL_INT2_RX_INVLD_DW_OFF))
                        dev_info(dev, "phy%d invalid dword cnt:   %u\n", phy_no,
                                 sphy->invalid_dword_count);

                if (irq_value & BIT(CHL_INT2_RX_CODE_ERR_OFF))
                        dev_info(dev, "phy%d code violation cnt:  %u\n", phy_no,
                                 phy->code_violation_err_count);

                if (irq_value & BIT(CHL_INT2_RX_DISP_ERR_OFF))
                        dev_info(dev, "phy%d disparity error cnt: %u\n", phy_no,
                                 sphy->running_disparity_error_count);
        }

        if ((irq_value & BIT(CHL_INT2_RX_INVLD_DW_OFF)) &&
            (pci_dev->revision == 0x20)) {
                u32 reg_value;
                int rc;

                rc = hisi_sas_read32_poll_timeout_atomic(
                                HILINK_ERR_DFX, reg_value,
                                !((reg_value >> 8) & BIT(phy_no)),
                                1000, 10000);
                if (rc)
                        hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
        }

        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT2, irq_value);
}

static void handle_chl_int0_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
{
        u32 irq_value0 = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT0);

        if (irq_value0 & CHL_INT0_PHY_RDY_MSK)
                hisi_sas_phy_oob_ready(hisi_hba, phy_no);

        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
                             irq_value0 & (~CHL_INT0_SL_RX_BCST_ACK_MSK)
                             & (~CHL_INT0_SL_PHY_ENABLE_MSK)
                             & (~CHL_INT0_NOT_RDY_MSK));
}

static irqreturn_t int_chnl_int_v3_hw(int irq_no, void *p)
{
        struct hisi_hba *hisi_hba = p;
        u32 irq_msk;
        int phy_no = 0;

        irq_msk = hisi_sas_read32(hisi_hba, CHNL_INT_STATUS)
                  & CHNL_INT_STS_MSK;

        while (irq_msk) {
                if (irq_msk & (CHNL_INT_STS_INT0_MSK << (phy_no * CHNL_WIDTH)))
                        handle_chl_int0_v3_hw(hisi_hba, phy_no);

                if (irq_msk & (CHNL_INT_STS_INT1_MSK << (phy_no * CHNL_WIDTH)))
                        handle_chl_int1_v3_hw(hisi_hba, phy_no);

                if (irq_msk & (CHNL_INT_STS_INT2_MSK << (phy_no * CHNL_WIDTH)))
                        handle_chl_int2_v3_hw(hisi_hba, phy_no);

                irq_msk &= ~(CHNL_INT_STS_PHY_MSK << (phy_no * CHNL_WIDTH));
                phy_no++;
        }

        return IRQ_HANDLED;
}

static const struct hisi_sas_hw_error multi_bit_ecc_errors[] = {
        {
                .irq_msk = BIT(SAS_ECC_INTR_DQE_ECC_MB_OFF),
                .msk = HGC_DQE_ECC_MB_ADDR_MSK,
                .shift = HGC_DQE_ECC_MB_ADDR_OFF,
                .msg = "hgc_dqe_eccbad_intr",
                .reg = HGC_DQE_ECC_ADDR,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_IOST_ECC_MB_OFF),
                .msk = HGC_IOST_ECC_MB_ADDR_MSK,
                .shift = HGC_IOST_ECC_MB_ADDR_OFF,
                .msg = "hgc_iost_eccbad_intr",
                .reg = HGC_IOST_ECC_ADDR,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_ITCT_ECC_MB_OFF),
                .msk = HGC_ITCT_ECC_MB_ADDR_MSK,
                .shift = HGC_ITCT_ECC_MB_ADDR_OFF,
                .msg = "hgc_itct_eccbad_intr",
                .reg = HGC_ITCT_ECC_ADDR,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_IOSTLIST_ECC_MB_OFF),
                .msk = HGC_LM_DFX_STATUS2_IOSTLIST_MSK,
                .shift = HGC_LM_DFX_STATUS2_IOSTLIST_OFF,
                .msg = "hgc_iostl_eccbad_intr",
                .reg = HGC_LM_DFX_STATUS2,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_ITCTLIST_ECC_MB_OFF),
                .msk = HGC_LM_DFX_STATUS2_ITCTLIST_MSK,
                .shift = HGC_LM_DFX_STATUS2_ITCTLIST_OFF,
                .msg = "hgc_itctl_eccbad_intr",
                .reg = HGC_LM_DFX_STATUS2,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_CQE_ECC_MB_OFF),
                .msk = HGC_CQE_ECC_MB_ADDR_MSK,
                .shift = HGC_CQE_ECC_MB_ADDR_OFF,
                .msg = "hgc_cqe_eccbad_intr",
                .reg = HGC_CQE_ECC_ADDR,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_NCQ_MEM0_ECC_MB_OFF),
                .msk = HGC_RXM_DFX_STATUS14_MEM0_MSK,
                .shift = HGC_RXM_DFX_STATUS14_MEM0_OFF,
                .msg = "rxm_mem0_eccbad_intr",
                .reg = HGC_RXM_DFX_STATUS14,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_NCQ_MEM1_ECC_MB_OFF),
                .msk = HGC_RXM_DFX_STATUS14_MEM1_MSK,
                .shift = HGC_RXM_DFX_STATUS14_MEM1_OFF,
                .msg = "rxm_mem1_eccbad_intr",
                .reg = HGC_RXM_DFX_STATUS14,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_NCQ_MEM2_ECC_MB_OFF),
                .msk = HGC_RXM_DFX_STATUS14_MEM2_MSK,
                .shift = HGC_RXM_DFX_STATUS14_MEM2_OFF,
                .msg = "rxm_mem2_eccbad_intr",
                .reg = HGC_RXM_DFX_STATUS14,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_NCQ_MEM3_ECC_MB_OFF),
                .msk = HGC_RXM_DFX_STATUS15_MEM3_MSK,
                .shift = HGC_RXM_DFX_STATUS15_MEM3_OFF,
                .msg = "rxm_mem3_eccbad_intr",
                .reg = HGC_RXM_DFX_STATUS15,
        },
        {
                .irq_msk = BIT(SAS_ECC_INTR_OOO_RAM_ECC_MB_OFF),
                .msk = AM_ROB_ECC_ERR_ADDR_MSK,
                .shift = AM_ROB_ECC_ERR_ADDR_OFF,
                .msg = "ooo_ram_eccbad_intr",
                .reg = AM_ROB_ECC_ERR_ADDR,
        },
};

static void multi_bit_ecc_error_process_v3_hw(struct hisi_hba *hisi_hba,
                                              u32 irq_value)
{
        struct device *dev = hisi_hba->dev;
        const struct hisi_sas_hw_error *ecc_error;
        u32 val;
        int i;

        for (i = 0; i < ARRAY_SIZE(multi_bit_ecc_errors); i++) {
                ecc_error = &multi_bit_ecc_errors[i];
                if (irq_value & ecc_error->irq_msk) {
                        val = hisi_sas_read32(hisi_hba, ecc_error->reg);
                        val &= ecc_error->msk;
                        val >>= ecc_error->shift;
                        dev_err(dev, "%s (0x%x) found: mem addr is 0x%08X\n",
                                ecc_error->msg, irq_value, val);
                        queue_work(hisi_hba->wq, &hisi_hba->rst_work);
                }
        }
}

static void fatal_ecc_int_v3_hw(struct hisi_hba *hisi_hba)
{
        u32 irq_value, irq_msk;

        irq_msk = hisi_sas_read32(hisi_hba, SAS_ECC_INTR_MSK);
        hisi_sas_write32(hisi_hba, SAS_ECC_INTR_MSK, 0xffffffff);

        irq_value = hisi_sas_read32(hisi_hba, SAS_ECC_INTR);
        if (irq_value)
                multi_bit_ecc_error_process_v3_hw(hisi_hba, irq_value);

        hisi_sas_write32(hisi_hba, SAS_ECC_INTR, irq_value);
        hisi_sas_write32(hisi_hba, SAS_ECC_INTR_MSK, irq_msk);
}

static const struct hisi_sas_hw_error axi_error[] = {
        { .msk = BIT(0), .msg = "IOST_AXI_W_ERR" },
        { .msk = BIT(1), .msg = "IOST_AXI_R_ERR" },
        { .msk = BIT(2), .msg = "ITCT_AXI_W_ERR" },

        { .msk = BIT(3), .msg = "ITCT_AXI_R_ERR" },
        { .msk = BIT(4), .msg = "SATA_AXI_W_ERR" },
        { .msk = BIT(5), .msg = "SATA_AXI_R_ERR" },
        { .msk = BIT(6), .msg = "DQE_AXI_R_ERR" },
        { .msk = BIT(7), .msg = "CQE_AXI_W_ERR" },
        {}
};

static const struct hisi_sas_hw_error fifo_error[] = {
        { .msk = BIT(8),  .msg = "CQE_WINFO_FIFO" },
        { .msk = BIT(9),  .msg = "CQE_MSG_FIFIO" },
        { .msk = BIT(10), .msg = "GETDQE_FIFO" },
        { .msk = BIT(11), .msg = "CMDP_FIFO" },
        { .msk = BIT(12), .msg = "AWTCTRL_FIFO" },
        {}
};

static const struct hisi_sas_hw_error fatal_axi_error[] = {
        {
                .irq_msk = BIT(ENT_INT_SRC3_WP_DEPTH_OFF),
                .msg = "write pointer and depth",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_IPTT_SLOT_NOMATCH_OFF),
                .msg = "iptt no match slot",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_RP_DEPTH_OFF),
                .msg = "read pointer and depth",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_AXI_OFF),
                .reg = HGC_AXI_FIFO_ERR_INFO,
                .sub = axi_error,
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_FIFO_OFF),
                .reg = HGC_AXI_FIFO_ERR_INFO,
                .sub = fifo_error,
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_LM_OFF),
                .msg = "LM add/fetch list",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_ABT_OFF),
                .msg = "SAS_HGC_ABT fetch LM list",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_DQE_POISON_OFF),
                .msg = "read dqe poison",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_IOST_POISON_OFF),
                .msg = "read iost poison",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_ITCT_POISON_OFF),
                .msg = "read itct poison",
        },
        {
                .irq_msk = BIT(ENT_INT_SRC3_ITCT_NCQ_POISON_OFF),
                .msg = "read itct ncq poison",
        },

};

static irqreturn_t fatal_axi_int_v3_hw(int irq_no, void *p)
{
        u32 irq_value, irq_msk;
        struct hisi_hba *hisi_hba = p;
        struct device *dev = hisi_hba->dev;
        struct pci_dev *pdev = hisi_hba->pci_dev;
        int i;

        irq_msk = hisi_sas_read32(hisi_hba, ENT_INT_SRC_MSK3);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK3, irq_msk | 0x1df00);

        irq_value = hisi_sas_read32(hisi_hba, ENT_INT_SRC3);
        irq_value &= ~irq_msk;

        for (i = 0; i < ARRAY_SIZE(fatal_axi_error); i++) {
                const struct hisi_sas_hw_error *error = &fatal_axi_error[i];

                if (!(irq_value & error->irq_msk))
                        continue;

                if (error->sub) {
                        const struct hisi_sas_hw_error *sub = error->sub;
                        u32 err_value = hisi_sas_read32(hisi_hba, error->reg);

                        for (; sub->msk || sub->msg; sub++) {
                                if (!(err_value & sub->msk))
                                        continue;

                                dev_err(dev, "%s error (0x%x) found!\n",
                                        sub->msg, irq_value);
                                queue_work(hisi_hba->wq, &hisi_hba->rst_work);
                        }
                } else {
                        dev_err(dev, "%s error (0x%x) found!\n",
                                error->msg, irq_value);
                        queue_work(hisi_hba->wq, &hisi_hba->rst_work);
                }

                if (pdev->revision < 0x21) {
                        u32 reg_val;

                        reg_val = hisi_sas_read32(hisi_hba,
                                                  AXI_MASTER_CFG_BASE +
                                                  AM_CTRL_GLOBAL);
                        reg_val |= AM_CTRL_SHUTDOWN_REQ_MSK;
                        hisi_sas_write32(hisi_hba, AXI_MASTER_CFG_BASE +
                                         AM_CTRL_GLOBAL, reg_val);
                }
        }

        fatal_ecc_int_v3_hw(hisi_hba);

        if (irq_value & BIT(ENT_INT_SRC3_ITC_INT_OFF)) {
                u32 reg_val = hisi_sas_read32(hisi_hba, ITCT_CLR);
                u32 dev_id = reg_val & ITCT_DEV_MSK;
                struct hisi_sas_device *sas_dev =
                                &hisi_hba->devices[dev_id];

                hisi_sas_write32(hisi_hba, ITCT_CLR, 0);
                dev_dbg(dev, "clear ITCT ok\n");
                complete(sas_dev->completion);
        }

        hisi_sas_write32(hisi_hba, ENT_INT_SRC3, irq_value & 0x1df00);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK3, irq_msk);

        return IRQ_HANDLED;
}

static void
slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
               struct hisi_sas_slot *slot)
{
        struct task_status_struct *ts = &task->task_status;
        struct hisi_sas_complete_v3_hdr *complete_queue =
                        hisi_hba->complete_hdr[slot->cmplt_queue];
        struct hisi_sas_complete_v3_hdr *complete_hdr =
                        &complete_queue[slot->cmplt_queue_slot];
        struct hisi_sas_err_record_v3 *record =
                        hisi_sas_status_buf_addr_mem(slot);
        u32 dma_rx_err_type = le32_to_cpu(record->dma_rx_err_type);
        u32 trans_tx_fail_type = le32_to_cpu(record->trans_tx_fail_type);
        u32 dw3 = le32_to_cpu(complete_hdr->dw3);

        switch (task->task_proto) {
        case SAS_PROTOCOL_SSP:
                if (dma_rx_err_type & RX_DATA_LEN_UNDERFLOW_MSK) {
                        ts->residual = trans_tx_fail_type;
                        ts->stat = SAS_DATA_UNDERRUN;
                } else if (dw3 & CMPLT_HDR_IO_IN_TARGET_MSK) {
                        ts->stat = SAS_QUEUE_FULL;
                        slot->abort = 1;
                } else {
                        ts->stat = SAS_OPEN_REJECT;
                        ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
                }
                break;
        case SAS_PROTOCOL_SATA:
        case SAS_PROTOCOL_STP:
        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
                if (dma_rx_err_type & RX_DATA_LEN_UNDERFLOW_MSK) {
                        ts->residual = trans_tx_fail_type;
                        ts->stat = SAS_DATA_UNDERRUN;
                } else if (dw3 & CMPLT_HDR_IO_IN_TARGET_MSK) {
                        ts->stat = SAS_PHY_DOWN;
                        slot->abort = 1;
                } else {
                        ts->stat = SAS_OPEN_REJECT;
                        ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
                }
                hisi_sas_sata_done(task, slot);
                break;
        case SAS_PROTOCOL_SMP:
                ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
                break;
        default:
                break;
        }
}

static void slot_complete_v3_hw(struct hisi_hba *hisi_hba,
                                struct hisi_sas_slot *slot)
{
        struct sas_task *task = slot->task;
        struct hisi_sas_device *sas_dev;
        struct device *dev = hisi_hba->dev;
        struct task_status_struct *ts;
        struct domain_device *device;
        struct sas_ha_struct *ha;
        struct hisi_sas_complete_v3_hdr *complete_queue =
                        hisi_hba->complete_hdr[slot->cmplt_queue];
        struct hisi_sas_complete_v3_hdr *complete_hdr =
                        &complete_queue[slot->cmplt_queue_slot];
        unsigned long flags;
        bool is_internal = slot->is_internal;
        u32 dw0, dw1, dw3;

        if (unlikely(!task || !task->lldd_task || !task->dev))
                return;

        ts = &task->task_status;
        device = task->dev;
        ha = device->port->ha;
        sas_dev = device->lldd_dev;

        spin_lock_irqsave(&task->task_state_lock, flags);
        task->task_state_flags &=
                ~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
        spin_unlock_irqrestore(&task->task_state_lock, flags);

        memset(ts, 0, sizeof(*ts));
        ts->resp = SAS_TASK_COMPLETE;

        if (unlikely(!sas_dev)) {
                dev_dbg(dev, "slot complete: port has not device\n");
                ts->stat = SAS_PHY_DOWN;
                goto out;
        }

        dw0 = le32_to_cpu(complete_hdr->dw0);
        dw1 = le32_to_cpu(complete_hdr->dw1);
        dw3 = le32_to_cpu(complete_hdr->dw3);

        /*
         * Use SAS+TMF status codes
         */
        switch ((dw0 & CMPLT_HDR_ABORT_STAT_MSK) >> CMPLT_HDR_ABORT_STAT_OFF) {
        case STAT_IO_ABORTED:
                /* this IO has been aborted by abort command */
                ts->stat = SAS_ABORTED_TASK;
                goto out;
        case STAT_IO_COMPLETE:
                /* internal abort command complete */
                ts->stat = TMF_RESP_FUNC_SUCC;
                goto out;
        case STAT_IO_NO_DEVICE:
                ts->stat = TMF_RESP_FUNC_COMPLETE;
                goto out;
        case STAT_IO_NOT_VALID:
                /*
                 * abort single IO, the controller can't find the IO
                 */
                ts->stat = TMF_RESP_FUNC_FAILED;
                goto out;
        default:
                break;
        }

        /* check for erroneous completion */
        if ((dw0 & CMPLT_HDR_CMPLT_MSK) == 0x3) {
                u32 *error_info = hisi_sas_status_buf_addr_mem(slot);

                slot_err_v3_hw(hisi_hba, task, slot);
                if (ts->stat != SAS_DATA_UNDERRUN)
                        dev_info(dev, "erroneous completion iptt=%d task=%pK dev id=%d addr=%016llx CQ hdr: 0x%x 0x%x 0x%x 0x%x Error info: 0x%x 0x%x 0x%x 0x%x\n",
                                 slot->idx, task, sas_dev->device_id,
                                 SAS_ADDR(device->sas_addr),
                                 dw0, dw1, complete_hdr->act, dw3,
                                 error_info[0], error_info[1],
                                 error_info[2], error_info[3]);
                if (unlikely(slot->abort)) {
                        sas_task_abort(task);
                        return;
                }
                goto out;
        }

        switch (task->task_proto) {
        case SAS_PROTOCOL_SSP: {
                struct ssp_response_iu *iu =
                        hisi_sas_status_buf_addr_mem(slot) +
                        sizeof(struct hisi_sas_err_record);

                sas_ssp_task_response(dev, task, iu);
                break;
        }
        case SAS_PROTOCOL_SMP: {
                struct scatterlist *sg_resp = &task->smp_task.smp_resp;
                void *to = page_address(sg_page(sg_resp));

                ts->stat = SAS_SAM_STAT_GOOD;

                dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
                             DMA_TO_DEVICE);
                memcpy(to + sg_resp->offset,
                        hisi_sas_status_buf_addr_mem(slot) +
                       sizeof(struct hisi_sas_err_record),
                       sg_resp->length);
                break;
        }
        case SAS_PROTOCOL_SATA:
        case SAS_PROTOCOL_STP:
        case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
                ts->stat = SAS_SAM_STAT_GOOD;
                hisi_sas_sata_done(task, slot);
                break;
        default:
                ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
                break;
        }

        if (!slot->port->port_attached) {
                dev_warn(dev, "slot complete: port %d has removed\n",
                        slot->port->sas_port.id);
                ts->stat = SAS_PHY_DOWN;
        }

out:
        spin_lock_irqsave(&task->task_state_lock, flags);
        if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
                spin_unlock_irqrestore(&task->task_state_lock, flags);
                dev_info(dev, "slot complete: task(%pK) aborted\n", task);
                return;
        }
        task->task_state_flags |= SAS_TASK_STATE_DONE;
        spin_unlock_irqrestore(&task->task_state_lock, flags);
        hisi_sas_slot_task_free(hisi_hba, task, slot);

        if (!is_internal && (task->task_proto != SAS_PROTOCOL_SMP)) {
                spin_lock_irqsave(&device->done_lock, flags);
                if (test_bit(SAS_HA_FROZEN, &ha->state)) {
                        spin_unlock_irqrestore(&device->done_lock, flags);
                        dev_info(dev, "slot complete: task(%pK) ignored\n ",
                                 task);
                        return;
                }
                spin_unlock_irqrestore(&device->done_lock, flags);
        }

        if (task->task_done)
                task->task_done(task);
}

static irqreturn_t  cq_thread_v3_hw(int irq_no, void *p)
{
        struct hisi_sas_cq *cq = p;
        struct hisi_hba *hisi_hba = cq->hisi_hba;
        struct hisi_sas_slot *slot;
        struct hisi_sas_complete_v3_hdr *complete_queue;
        u32 rd_point = cq->rd_point, wr_point;
        int queue = cq->id;

        complete_queue = hisi_hba->complete_hdr[queue];

        wr_point = hisi_sas_read32(hisi_hba, COMPL_Q_0_WR_PTR +
                                   (0x14 * queue));

        while (rd_point != wr_point) {
                struct hisi_sas_complete_v3_hdr *complete_hdr;
                struct device *dev = hisi_hba->dev;
                u32 dw1;
                int iptt;

                complete_hdr = &complete_queue[rd_point];
                dw1 = le32_to_cpu(complete_hdr->dw1);

                iptt = dw1 & CMPLT_HDR_IPTT_MSK;
                if (likely(iptt < HISI_SAS_COMMAND_ENTRIES_V3_HW)) {
                        slot = &hisi_hba->slot_info[iptt];
                        slot->cmplt_queue_slot = rd_point;
                        slot->cmplt_queue = queue;
                        slot_complete_v3_hw(hisi_hba, slot);
                } else
                        dev_err(dev, "IPTT %d is invalid, discard it.\n", iptt);

                if (++rd_point >= HISI_SAS_QUEUE_SLOTS)
                        rd_point = 0;
        }

        /* update rd_point */
        cq->rd_point = rd_point;
        hisi_sas_write32(hisi_hba, COMPL_Q_0_RD_PTR + (0x14 * queue), rd_point);

        return IRQ_HANDLED;
}

static irqreturn_t cq_interrupt_v3_hw(int irq_no, void *p)
{
        struct hisi_sas_cq *cq = p;
        struct hisi_hba *hisi_hba = cq->hisi_hba;
        int queue = cq->id;

        hisi_sas_write32(hisi_hba, OQ_INT_SRC, 1 << queue);

        return IRQ_WAKE_THREAD;
}

static int interrupt_preinit_v3_hw(struct hisi_hba *hisi_hba)
{
        int vectors;
        int max_msi = HISI_SAS_MSI_COUNT_V3_HW, min_msi;
        struct Scsi_Host *shost = hisi_hba->shost;
        struct irq_affinity desc = {
                .pre_vectors = BASE_VECTORS_V3_HW,
        };

        min_msi = MIN_AFFINE_VECTORS_V3_HW;
        vectors = pci_alloc_irq_vectors_affinity(hisi_hba->pci_dev,
                                                 min_msi, max_msi,
                                                 PCI_IRQ_MSI |
                                                 PCI_IRQ_AFFINITY,
                                                 &desc);
        if (vectors < 0)
                return -ENOENT;


        hisi_hba->cq_nvecs = vectors - BASE_VECTORS_V3_HW;
        shost->nr_hw_queues = hisi_hba->cq_nvecs;

        return 0;
}

static int interrupt_init_v3_hw(struct hisi_hba *hisi_hba)
{
        struct device *dev = hisi_hba->dev;
        struct pci_dev *pdev = hisi_hba->pci_dev;
        int rc, i;

        rc = devm_request_irq(dev, pci_irq_vector(pdev, 1),
                              int_phy_up_down_bcast_v3_hw, 0,
                              DRV_NAME " phy", hisi_hba);
        if (rc) {
                dev_err(dev, "could not request phy interrupt, rc=%d\n", rc);
                return -ENOENT;
        }

        rc = devm_request_irq(dev, pci_irq_vector(pdev, 2),
                              int_chnl_int_v3_hw, 0,
                              DRV_NAME " channel", hisi_hba);
        if (rc) {
                dev_err(dev, "could not request chnl interrupt, rc=%d\n", rc);
                return -ENOENT;
        }

        rc = devm_request_irq(dev, pci_irq_vector(pdev, 11),
                              fatal_axi_int_v3_hw, 0,
                              DRV_NAME " fatal", hisi_hba);
        if (rc) {
                dev_err(dev, "could not request fatal interrupt, rc=%d\n", rc);
                return -ENOENT;
        }

        if (hisi_sas_intr_conv)
                dev_info(dev, "Enable interrupt converge\n");

        for (i = 0; i < hisi_hba->cq_nvecs; i++) {
                struct hisi_sas_cq *cq = &hisi_hba->cq[i];
                int nr = hisi_sas_intr_conv ? 16 : 16 + i;
                unsigned long irqflags = hisi_sas_intr_conv ? IRQF_SHARED :
                                                              IRQF_ONESHOT;

                cq->irq_no = pci_irq_vector(pdev, nr);
                rc = devm_request_threaded_irq(dev, cq->irq_no,
                                      cq_interrupt_v3_hw,
                                      cq_thread_v3_hw,
                                      irqflags,
                                      DRV_NAME " cq", cq);
                if (rc) {
                        dev_err(dev, "could not request cq%d interrupt, rc=%d\n",
                                i, rc);
                        return -ENOENT;
                }
                cq->irq_mask = pci_irq_get_affinity(pdev, i + BASE_VECTORS_V3_HW);
                if (!cq->irq_mask) {
                        dev_err(dev, "could not get cq%d irq affinity!\n", i);
                        return -ENOENT;
                }
        }

        return 0;
}

static int hisi_sas_v3_init(struct hisi_hba *hisi_hba)
{
        int rc;

        rc = hw_init_v3_hw(hisi_hba);
        if (rc)
                return rc;

        rc = interrupt_init_v3_hw(hisi_hba);
        if (rc)
                return rc;

        return 0;
}

static void phy_set_linkrate_v3_hw(struct hisi_hba *hisi_hba, int phy_no,
                struct sas_phy_linkrates *r)
{
        enum sas_linkrate max = r->maximum_linkrate;
        u32 prog_phy_link_rate = hisi_sas_phy_read32(hisi_hba, phy_no,
                                                     PROG_PHY_LINK_RATE);

        prog_phy_link_rate &= ~CFG_PROG_PHY_LINK_RATE_MSK;
        prog_phy_link_rate |= hisi_sas_get_prog_phy_linkrate_mask(max);
        hisi_sas_phy_write32(hisi_hba, phy_no, PROG_PHY_LINK_RATE,
                             prog_phy_link_rate);
}

static void interrupt_disable_v3_hw(struct hisi_hba *hisi_hba)
{
        struct pci_dev *pdev = hisi_hba->pci_dev;
        int i;

        synchronize_irq(pci_irq_vector(pdev, 1));
        synchronize_irq(pci_irq_vector(pdev, 2));
        synchronize_irq(pci_irq_vector(pdev, 11));
        for (i = 0; i < hisi_hba->queue_count; i++)
                hisi_sas_write32(hisi_hba, OQ0_INT_SRC_MSK + 0x4 * i, 0x1);

        for (i = 0; i < hisi_hba->cq_nvecs; i++)
                synchronize_irq(pci_irq_vector(pdev, i + 16));

        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK1, 0xffffffff);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK2, 0xffffffff);
        hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK3, 0xffffffff);
        hisi_sas_write32(hisi_hba, SAS_ECC_INTR_MSK, 0xffffffff);

        for (i = 0; i < hisi_hba->n_phy; i++) {
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT1_MSK, 0xffffffff);
                hisi_sas_phy_write32(hisi_hba, i, CHL_INT2_MSK, 0xffffffff);
                hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_NOT_RDY_MSK, 0x1);
                hisi_sas_phy_write32(hisi_hba, i, PHYCTRL_PHY_ENA_MSK, 0x1);
                hisi_sas_phy_write32(hisi_hba, i, SL_RX_BCAST_CHK_MSK, 0x1);
        }
}

static u32 get_phys_state_v3_hw(struct hisi_hba *hisi_hba)
{
        return hisi_sas_read32(hisi_hba, PHY_STATE);
}

static int disable_host_v3_hw(struct hisi_hba *hisi_hba)
{
        struct device *dev = hisi_hba->dev;
        u32 status, reg_val;
        int rc;

        interrupt_disable_v3_hw(hisi_hba);
        hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0x0);

        hisi_sas_stop_phys(hisi_hba);

        mdelay(10);

        reg_val = hisi_sas_read32(hisi_hba, AXI_MASTER_CFG_BASE +
                                  AM_CTRL_GLOBAL);
        reg_val |= AM_CTRL_SHUTDOWN_REQ_MSK;
        hisi_sas_write32(hisi_hba, AXI_MASTER_CFG_BASE +
                         AM_CTRL_GLOBAL, reg_val);

        /* wait until bus idle */
        rc = hisi_sas_read32_poll_timeout(AXI_MASTER_CFG_BASE +
                                          AM_CURR_TRANS_RETURN, status,
                                          status == 0x3, 10, 100);
        if (rc) {
                dev_err(dev, "axi bus is not idle, rc=%d\n", rc);
                return rc;
        }

        return 0;
}

static int soft_reset_v3_hw(struct hisi_hba *hisi_hba)
{
        struct device *dev = hisi_hba->dev;
        int rc;

        rc = disable_host_v3_hw(hisi_hba);
        if (rc) {
                dev_err(dev, "soft reset: disable host failed rc=%d\n", rc);
                return rc;
        }

        hisi_sas_init_mem(hisi_hba);

        return hw_init_v3_hw(hisi_hba);
}

static int write_gpio_v3_hw(struct hisi_hba *hisi_hba, u8 reg_type,
                        u8 reg_index, u8 reg_count, u8 *write_data)
{
        struct device *dev = hisi_hba->dev;
        u32 *data = (u32 *)write_data;
        int i;

        switch (reg_type) {
        case SAS_GPIO_REG_TX:
                if ((reg_index + reg_count) > ((hisi_hba->n_phy + 3) / 4)) {
                        dev_err(dev, "write gpio: invalid reg range[%d, %d]\n",
                                reg_index, reg_index + reg_count - 1);
                        return -EINVAL;
                }

                for (i = 0; i < reg_count; i++)
                        hisi_sas_write32(hisi_hba,
                                         SAS_GPIO_TX_0_1 + (reg_index + i) * 4,
                                         data[i]);
                break;
        default:
                dev_err(dev, "write gpio: unsupported or bad reg type %d\n",
                        reg_type);
                return -EINVAL;
        }

        return 0;
}

static void wait_cmds_complete_timeout_v3_hw(struct hisi_hba *hisi_hba,
                                             int delay_ms, int timeout_ms)
{
        struct device *dev = hisi_hba->dev;
        int entries, entries_old = 0, time;

        for (time = 0; time < timeout_ms; time += delay_ms) {
                entries = hisi_sas_read32(hisi_hba, CQE_SEND_CNT);
                if (entries == entries_old)
                        break;

                entries_old = entries;
                msleep(delay_ms);
        }

        if (time >= timeout_ms) {
                dev_dbg(dev, "Wait commands complete timeout!\n");
                return;
        }

        dev_dbg(dev, "wait commands complete %dms\n", time);
}

static ssize_t intr_conv_v3_hw_show(struct device *dev,
                                    struct device_attribute *attr, char *buf)
{
        return scnprintf(buf, PAGE_SIZE, "%u\n", hisi_sas_intr_conv);
}
static DEVICE_ATTR_RO(intr_conv_v3_hw);

static void config_intr_coal_v3_hw(struct hisi_hba *hisi_hba)
{
        /* config those registers between enable and disable PHYs */
        hisi_sas_stop_phys(hisi_hba);

        if (hisi_hba->intr_coal_ticks == 0 ||
            hisi_hba->intr_coal_count == 0) {
                hisi_sas_write32(hisi_hba, INT_COAL_EN, 0x1);
                hisi_sas_write32(hisi_hba, OQ_INT_COAL_TIME, 0x1);
                hisi_sas_write32(hisi_hba, OQ_INT_COAL_CNT, 0x1);
        } else {
                hisi_sas_write32(hisi_hba, INT_COAL_EN, 0x3);
                hisi_sas_write32(hisi_hba, OQ_INT_COAL_TIME,
                                 hisi_hba->intr_coal_ticks);
                hisi_sas_write32(hisi_hba, OQ_INT_COAL_CNT,
                                 hisi_hba->intr_coal_count);
        }
        phys_init_v3_hw(hisi_hba);
}

static ssize_t intr_coal_ticks_v3_hw_show(struct device *dev,
                                          struct device_attribute *attr,
                                          char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct hisi_hba *hisi_hba = shost_priv(shost);

        return scnprintf(buf, PAGE_SIZE, "%u\n",
                         hisi_hba->intr_coal_ticks);
}

static ssize_t intr_coal_ticks_v3_hw_store(struct device *dev,
                                           struct device_attribute *attr,
                                           const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct hisi_hba *hisi_hba = shost_priv(shost);
        u32 intr_coal_ticks;
        int ret;

        ret = kstrtou32(buf, 10, &intr_coal_ticks);
        if (ret) {
                dev_err(dev, "Input data of interrupt coalesce unmatch\n");
                return -EINVAL;
        }

        if (intr_coal_ticks >= BIT(24)) {
                dev_err(dev, "intr_coal_ticks must be less than 2^24!\n");
                return -EINVAL;
        }

        hisi_hba->intr_coal_ticks = intr_coal_ticks;

        config_intr_coal_v3_hw(hisi_hba);

        return count;
}
static DEVICE_ATTR_RW(intr_coal_ticks_v3_hw);

static ssize_t intr_coal_count_v3_hw_show(struct device *dev,
                                          struct device_attribute
                                          *attr, char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct hisi_hba *hisi_hba = shost_priv(shost);

        return scnprintf(buf, PAGE_SIZE, "%u\n",
                         hisi_hba->intr_coal_count);
}

static ssize_t intr_coal_count_v3_hw_store(struct device *dev,
                struct device_attribute
                *attr, const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct hisi_hba *hisi_hba = shost_priv(shost);
        u32 intr_coal_count;
        int ret;

        ret = kstrtou32(buf, 10, &intr_coal_count);
        if (ret) {
                dev_err(dev, "Input data of interrupt coalesce unmatch\n");
                return -EINVAL;
        }

        if (intr_coal_count >= BIT(8)) {
                dev_err(dev, "intr_coal_count must be less than 2^8!\n");
                return -EINVAL;
        }

        hisi_hba->intr_coal_count = intr_coal_count;

        config_intr_coal_v3_hw(hisi_hba);

        return count;
}
static DEVICE_ATTR_RW(intr_coal_count_v3_hw);

static int slave_configure_v3_hw(struct scsi_device *sdev)
{
        struct Scsi_Host *shost = dev_to_shost(&sdev->sdev_gendev);
        struct domain_device *ddev = sdev_to_domain_dev(sdev);
        struct hisi_hba *hisi_hba = shost_priv(shost);
        struct device *dev = hisi_hba->dev;
        int ret = sas_slave_configure(sdev);

        if (ret)
                return ret;
        if (!dev_is_sata(ddev))
                sas_change_queue_depth(sdev, 64);

        if (sdev->type == TYPE_ENCLOSURE)
                return 0;

        if (!device_link_add(&sdev->sdev_gendev, dev,
                             DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)) {
                if (pm_runtime_enabled(dev)) {
                        dev_info(dev, "add device link failed, disable runtime PM for the host\n");
                        pm_runtime_disable(dev);
                }
        }

        return 0;
}

static struct device_attribute *host_attrs_v3_hw[] = {
        &dev_attr_phy_event_threshold,
        &dev_attr_intr_conv_v3_hw,
        &dev_attr_intr_coal_ticks_v3_hw,
        &dev_attr_intr_coal_count_v3_hw,
        NULL
};

#define HISI_SAS_DEBUGFS_REG(x) {#x, x}

struct hisi_sas_debugfs_reg_lu {
        char *name;
        int off;
};

struct hisi_sas_debugfs_reg {
        const struct hisi_sas_debugfs_reg_lu *lu;
        int count;
        int base_off;
};

static const struct hisi_sas_debugfs_reg_lu debugfs_port_reg_lu[] = {
        HISI_SAS_DEBUGFS_REG(PHY_CFG),
        HISI_SAS_DEBUGFS_REG(HARD_PHY_LINKRATE),
        HISI_SAS_DEBUGFS_REG(PROG_PHY_LINK_RATE),
        HISI_SAS_DEBUGFS_REG(PHY_CTRL),
        HISI_SAS_DEBUGFS_REG(SL_CFG),
        HISI_SAS_DEBUGFS_REG(AIP_LIMIT),
        HISI_SAS_DEBUGFS_REG(SL_CONTROL),
        HISI_SAS_DEBUGFS_REG(RX_PRIMS_STATUS),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD0),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD1),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD2),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD3),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD4),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD5),
        HISI_SAS_DEBUGFS_REG(TX_ID_DWORD6),
        HISI_SAS_DEBUGFS_REG(TXID_AUTO),
        HISI_SAS_DEBUGFS_REG(RX_IDAF_DWORD0),
        HISI_SAS_DEBUGFS_REG(RXOP_CHECK_CFG_H),
        HISI_SAS_DEBUGFS_REG(STP_LINK_TIMER),
        HISI_SAS_DEBUGFS_REG(STP_LINK_TIMEOUT_STATE),
        HISI_SAS_DEBUGFS_REG(CON_CFG_DRIVER),
        HISI_SAS_DEBUGFS_REG(SAS_SSP_CON_TIMER_CFG),
        HISI_SAS_DEBUGFS_REG(SAS_SMP_CON_TIMER_CFG),
        HISI_SAS_DEBUGFS_REG(SAS_STP_CON_TIMER_CFG),
        HISI_SAS_DEBUGFS_REG(CHL_INT0),
        HISI_SAS_DEBUGFS_REG(CHL_INT1),
        HISI_SAS_DEBUGFS_REG(CHL_INT2),
        HISI_SAS_DEBUGFS_REG(CHL_INT0_MSK),
        HISI_SAS_DEBUGFS_REG(CHL_INT1_MSK),
        HISI_SAS_DEBUGFS_REG(CHL_INT2_MSK),
        HISI_SAS_DEBUGFS_REG(SAS_EC_INT_COAL_TIME),
        HISI_SAS_DEBUGFS_REG(CHL_INT_COAL_EN),
        HISI_SAS_DEBUGFS_REG(SAS_RX_TRAIN_TIMER),
        HISI_SAS_DEBUGFS_REG(PHY_CTRL_RDY_MSK),
        HISI_SAS_DEBUGFS_REG(PHYCTRL_NOT_RDY_MSK),
        HISI_SAS_DEBUGFS_REG(PHYCTRL_DWS_RESET_MSK),
        HISI_SAS_DEBUGFS_REG(PHYCTRL_PHY_ENA_MSK),
        HISI_SAS_DEBUGFS_REG(SL_RX_BCAST_CHK_MSK),
        HISI_SAS_DEBUGFS_REG(PHYCTRL_OOB_RESTART_MSK),
        HISI_SAS_DEBUGFS_REG(DMA_TX_STATUS),
        HISI_SAS_DEBUGFS_REG(DMA_RX_STATUS),
        HISI_SAS_DEBUGFS_REG(COARSETUNE_TIME),
        HISI_SAS_DEBUGFS_REG(ERR_CNT_DWS_LOST),
        HISI_SAS_DEBUGFS_REG(ERR_CNT_RESET_PROB),
        HISI_SAS_DEBUGFS_REG(ERR_CNT_INVLD_DW),
        HISI_SAS_DEBUGFS_REG(ERR_CNT_CODE_ERR),
        HISI_SAS_DEBUGFS_REG(ERR_CNT_DISP_ERR),
        {}
};

static const struct hisi_sas_debugfs_reg debugfs_port_reg = {
        .lu = debugfs_port_reg_lu,
        .count = 0x100,
        .base_off = PORT_BASE,
};

static const struct hisi_sas_debugfs_reg_lu debugfs_global_reg_lu[] = {
        HISI_SAS_DEBUGFS_REG(DLVRY_QUEUE_ENABLE),
        HISI_SAS_DEBUGFS_REG(PHY_CONTEXT),
        HISI_SAS_DEBUGFS_REG(PHY_STATE),
        HISI_SAS_DEBUGFS_REG(PHY_PORT_NUM_MA),
        HISI_SAS_DEBUGFS_REG(PHY_CONN_RATE),
        HISI_SAS_DEBUGFS_REG(ITCT_CLR),
        HISI_SAS_DEBUGFS_REG(IO_SATA_BROKEN_MSG_ADDR_LO),
        HISI_SAS_DEBUGFS_REG(IO_SATA_BROKEN_MSG_ADDR_HI),
        HISI_SAS_DEBUGFS_REG(SATA_INITI_D2H_STORE_ADDR_LO),
        HISI_SAS_DEBUGFS_REG(SATA_INITI_D2H_STORE_ADDR_HI),
        HISI_SAS_DEBUGFS_REG(CFG_MAX_TAG),
        HISI_SAS_DEBUGFS_REG(HGC_SAS_TX_OPEN_FAIL_RETRY_CTRL),
        HISI_SAS_DEBUGFS_REG(HGC_SAS_TXFAIL_RETRY_CTRL),
        HISI_SAS_DEBUGFS_REG(HGC_GET_ITV_TIME),
        HISI_SAS_DEBUGFS_REG(DEVICE_MSG_WORK_MODE),
        HISI_SAS_DEBUGFS_REG(OPENA_WT_CONTI_TIME),
        HISI_SAS_DEBUGFS_REG(I_T_NEXUS_LOSS_TIME),
        HISI_SAS_DEBUGFS_REG(MAX_CON_TIME_LIMIT_TIME),
        HISI_SAS_DEBUGFS_REG(BUS_INACTIVE_LIMIT_TIME),
        HISI_SAS_DEBUGFS_REG(REJECT_TO_OPEN_LIMIT_TIME),
        HISI_SAS_DEBUGFS_REG(CQ_INT_CONVERGE_EN),
        HISI_SAS_DEBUGFS_REG(CFG_AGING_TIME),
        HISI_SAS_DEBUGFS_REG(HGC_DFX_CFG2),
        HISI_SAS_DEBUGFS_REG(CFG_ABT_SET_QUERY_IPTT),
        HISI_SAS_DEBUGFS_REG(CFG_ABT_SET_IPTT_DONE),
        HISI_SAS_DEBUGFS_REG(HGC_IOMB_PROC1_STATUS),
        HISI_SAS_DEBUGFS_REG(CHNL_INT_STATUS),
        HISI_SAS_DEBUGFS_REG(HGC_AXI_FIFO_ERR_INFO),
        HISI_SAS_DEBUGFS_REG(INT_COAL_EN),
        HISI_SAS_DEBUGFS_REG(OQ_INT_COAL_TIME),
        HISI_SAS_DEBUGFS_REG(OQ_INT_COAL_CNT),
        HISI_SAS_DEBUGFS_REG(ENT_INT_COAL_TIME),
        HISI_SAS_DEBUGFS_REG(ENT_INT_COAL_CNT),
        HISI_SAS_DEBUGFS_REG(OQ_INT_SRC),
        HISI_SAS_DEBUGFS_REG(OQ_INT_SRC_MSK),
        HISI_SAS_DEBUGFS_REG(ENT_INT_SRC1),
        HISI_SAS_DEBUGFS_REG(ENT_INT_SRC2),
        HISI_SAS_DEBUGFS_REG(ENT_INT_SRC3),
        HISI_SAS_DEBUGFS_REG(ENT_INT_SRC_MSK1),
        HISI_SAS_DEBUGFS_REG(ENT_INT_SRC_MSK2),
        HISI_SAS_DEBUGFS_REG(ENT_INT_SRC_MSK3),
        HISI_SAS_DEBUGFS_REG(CHNL_PHYUPDOWN_INT_MSK),
        HISI_SAS_DEBUGFS_REG(CHNL_ENT_INT_MSK),
        HISI_SAS_DEBUGFS_REG(HGC_COM_INT_MSK),
        HISI_SAS_DEBUGFS_REG(SAS_ECC_INTR),
        HISI_SAS_DEBUGFS_REG(SAS_ECC_INTR_MSK),
        HISI_SAS_DEBUGFS_REG(HGC_ERR_STAT_EN),
        HISI_SAS_DEBUGFS_REG(CQE_SEND_CNT),
        HISI_SAS_DEBUGFS_REG(DLVRY_Q_0_DEPTH),
        HISI_SAS_DEBUGFS_REG(DLVRY_Q_0_WR_PTR),
        HISI_SAS_DEBUGFS_REG(DLVRY_Q_0_RD_PTR),
        HISI_SAS_DEBUGFS_REG(HYPER_STREAM_ID_EN_CFG),
        HISI_SAS_DEBUGFS_REG(OQ0_INT_SRC_MSK),
        HISI_SAS_DEBUGFS_REG(COMPL_Q_0_DEPTH),
        HISI_SAS_DEBUGFS_REG(COMPL_Q_0_WR_PTR),
        HISI_SAS_DEBUGFS_REG(COMPL_Q_0_RD_PTR),
        HISI_SAS_DEBUGFS_REG(AWQOS_AWCACHE_CFG),
        HISI_SAS_DEBUGFS_REG(ARQOS_ARCACHE_CFG),
        HISI_SAS_DEBUGFS_REG(HILINK_ERR_DFX),
        HISI_SAS_DEBUGFS_REG(SAS_GPIO_CFG_0),
        HISI_SAS_DEBUGFS_REG(SAS_GPIO_CFG_1),
        HISI_SAS_DEBUGFS_REG(SAS_GPIO_TX_0_1),
        HISI_SAS_DEBUGFS_REG(SAS_CFG_DRIVE_VLD),
        {}
};

static const struct hisi_sas_debugfs_reg debugfs_global_reg = {
        .lu = debugfs_global_reg_lu,
        .count = 0x800,
};

static const struct hisi_sas_debugfs_reg_lu debugfs_axi_reg_lu[] = {
        HISI_SAS_DEBUGFS_REG(AM_CFG_MAX_TRANS),
        HISI_SAS_DEBUGFS_REG(AM_CFG_SINGLE_PORT_MAX_TRANS),
        HISI_SAS_DEBUGFS_REG(AXI_CFG),
        HISI_SAS_DEBUGFS_REG(AM_ROB_ECC_ERR_ADDR),
        {}
};

static const struct hisi_sas_debugfs_reg debugfs_axi_reg = {
        .lu = debugfs_axi_reg_lu,
        .count = 0x61,
        .base_off = AXI_MASTER_CFG_BASE,
};

static const struct hisi_sas_debugfs_reg_lu debugfs_ras_reg_lu[] = {
        HISI_SAS_DEBUGFS_REG(SAS_RAS_INTR0),
        HISI_SAS_DEBUGFS_REG(SAS_RAS_INTR1),
        HISI_SAS_DEBUGFS_REG(SAS_RAS_INTR0_MASK),
        HISI_SAS_DEBUGFS_REG(SAS_RAS_INTR1_MASK),
        HISI_SAS_DEBUGFS_REG(CFG_SAS_RAS_INTR_MASK),
        HISI_SAS_DEBUGFS_REG(SAS_RAS_INTR2),
        HISI_SAS_DEBUGFS_REG(SAS_RAS_INTR2_MASK),
        {}
};

static const struct hisi_sas_debugfs_reg debugfs_ras_reg = {
        .lu = debugfs_ras_reg_lu,
        .count = 0x10,
        .base_off = RAS_BASE,
};

static void debugfs_snapshot_prepare_v3_hw(struct hisi_hba *hisi_hba)
{
        set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);

        hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0);

        wait_cmds_complete_timeout_v3_hw(hisi_hba, 100, 5000);

        hisi_sas_sync_irqs(hisi_hba);
}

static void debugfs_snapshot_restore_v3_hw(struct hisi_hba *hisi_hba)
{
        hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE,
                         (u32)((1ULL << hisi_hba->queue_count) - 1));

        clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
}

static void read_iost_itct_cache_v3_hw(struct hisi_hba *hisi_hba,
                                       enum hisi_sas_debugfs_cache_type type,
                                       u32 *cache)
{
        u32 cache_dw_size = HISI_SAS_IOST_ITCT_CACHE_DW_SZ *
                            HISI_SAS_IOST_ITCT_CACHE_NUM;
        struct device *dev = hisi_hba->dev;
        u32 *buf = cache;
        u32 i, val;

        hisi_sas_write32(hisi_hba, TAB_RD_TYPE, type);

        for (i = 0; i < HISI_SAS_IOST_ITCT_CACHE_DW_SZ; i++) {
                val = hisi_sas_read32(hisi_hba, TAB_DFX);
                if (val == 0xffffffff)
                        break;
        }

        if (val != 0xffffffff) {
                dev_err(dev, "Issue occurred in reading IOST/ITCT cache!\n");
                return;
        }

        memset(buf, 0, cache_dw_size * 4);
        buf[0] = val;

        for (i = 1; i < cache_dw_size; i++)
                buf[i] = hisi_sas_read32(hisi_hba, TAB_DFX);
}