/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
/* Copyright 2017-2019 NXP */

#include <linux/bitops.h>

/* ENETC device IDs */
#define ENETC_DEV_ID_PF         0xe100
#define ENETC_DEV_ID_VF         0xef00
#define ENETC_DEV_ID_PTP        0xee02

/* ENETC register block BAR */
#define ENETC_BAR_REGS  0

/** SI regs, offset: 0h */
#define ENETC_SIMR      0
#define ENETC_SIMR_EN   BIT(31)
#define ENETC_SIMR_RSSE BIT(0)
#define ENETC_SICTR0    0x18
#define ENETC_SICTR1    0x1c
#define ENETC_SIPCAPR0  0x20
#define ENETC_SIPCAPR0_RSS      BIT(8)
#define ENETC_SIPCAPR1  0x24
#define ENETC_SITGTGR   0x30
#define ENETC_SIRBGCR   0x38
/* cache attribute registers for transactions initiated by ENETC */
#define ENETC_SICAR0    0x40
#define ENETC_SICAR1    0x44
#define ENETC_SICAR2    0x48
/* rd snoop, no alloc
 * wr snoop, no alloc, partial cache line update for BDs and full cache line
 * update for data
 */
#define ENETC_SICAR_RD_COHERENT 0x2b2b0000
#define ENETC_SICAR_WR_COHERENT 0x00006727
#define ENETC_SICAR_MSI 0x00300030 /* rd/wr device, no snoop, no alloc */

#define ENETC_SIPMAR0   0x80
#define ENETC_SIPMAR1   0x84

/* VF-PF Message passing */
#define ENETC_DEFAULT_MSG_SIZE  1024    /* and max size */
/* msg size encoding: default and max msg value of 1024B encoded as 0 */
static inline u32 enetc_vsi_set_msize(u32 size)
{
        return size < ENETC_DEFAULT_MSG_SIZE ? size >> 5 : 0;
}

#define ENETC_PSIMSGRR  0x204
#define ENETC_PSIMSGRR_MR_MASK  GENMASK(2, 1)
#define ENETC_PSIMSGRR_MR(n) BIT((n) + 1) /* n = VSI index */
#define ENETC_PSIVMSGRCVAR0(n)  (0x210 + (n) * 0x8) /* n = VSI index */
#define ENETC_PSIVMSGRCVAR1(n)  (0x214 + (n) * 0x8)

#define ENETC_VSIMSGSR  0x204   /* RO */
#define ENETC_VSIMSGSR_MB       BIT(0)
#define ENETC_VSIMSGSR_MS       BIT(1)
#define ENETC_VSIMSGSNDAR0      0x210
#define ENETC_VSIMSGSNDAR1      0x214

#define ENETC_SIMSGSR_SET_MC(val) ((val) << 16)
#define ENETC_SIMSGSR_GET_MC(val) ((val) >> 16)

/* SI statistics */
#define ENETC_SIROCT    0x300
#define ENETC_SIRFRM    0x308
#define ENETC_SIRUCA    0x310
#define ENETC_SIRMCA    0x318
#define ENETC_SITOCT    0x320
#define ENETC_SITFRM    0x328
#define ENETC_SITUCA    0x330
#define ENETC_SITMCA    0x338
#define ENETC_RBDCR(n)  (0x8180 + (n) * 0x200)

/* Control BDR regs */
#define ENETC_SICBDRMR          0x800
#define ENETC_SICBDRSR          0x804   /* RO */
#define ENETC_SICBDRBAR0        0x810
#define ENETC_SICBDRBAR1        0x814
#define ENETC_SICBDRPIR         0x818
#define ENETC_SICBDRCIR         0x81c
#define ENETC_SICBDRLENR        0x820

#define ENETC_SICAPR0   0x900
#define ENETC_SICAPR1   0x904

#define ENETC_PSIIER    0xa00
#define ENETC_PSIIER_MR_MASK    GENMASK(2, 1)
#define ENETC_PSIIDR    0xa08
#define ENETC_SITXIDR   0xa18
#define ENETC_SIRXIDR   0xa28
#define ENETC_SIMSIVR   0xa30

#define ENETC_SIMSITRV(n) (0xB00 + (n) * 0x4)
#define ENETC_SIMSIRRV(n) (0xB80 + (n) * 0x4)

#define ENETC_SIUEFDCR  0xe28

#define ENETC_SIRFSCAPR 0x1200
#define ENETC_SIRFSCAPR_GET_NUM_RFS(val) ((val) & 0x7f)
#define ENETC_SIRSSCAPR 0x1600
#define ENETC_SIRSSCAPR_GET_NUM_RSS(val) (BIT((val) & 0xf) * 32)

/** SI BDR sub-blocks, n = 0..7 */
enum enetc_bdr_type {TX, RX};
#define ENETC_BDR_OFF(i)        ((i) * 0x200)
#define ENETC_BDR(t, i, r)      (0x8000 + (t) * 0x100 + ENETC_BDR_OFF(i) + (r))
/* RX BDR reg offsets */
#define ENETC_RBMR      0
#define ENETC_RBMR_BDS  BIT(2)
#define ENETC_RBMR_VTE  BIT(5)
#define ENETC_RBMR_EN   BIT(31)
#define ENETC_RBSR      0x4
#define ENETC_RBBSR     0x8
#define ENETC_RBCIR     0xc
#define ENETC_RBBAR0    0x10
#define ENETC_RBBAR1    0x14
#define ENETC_RBPIR     0x18
#define ENETC_RBLENR    0x20
#define ENETC_RBIER     0xa0
#define ENETC_RBIER_RXTIE       BIT(0)
#define ENETC_RBIDR     0xa4
#define ENETC_RBICIR0   0xa8
#define ENETC_RBICIR0_ICEN      BIT(31)

/* TX BDR reg offsets */
#define ENETC_TBMR      0
#define ENETC_TBSR_BUSY BIT(0)
#define ENETC_TBMR_VIH  BIT(9)
#define ENETC_TBMR_PRIO_MASK            GENMASK(2, 0)
#define ENETC_TBMR_PRIO_SET(val)        val
#define ENETC_TBMR_EN   BIT(31)
#define ENETC_TBSR      0x4
#define ENETC_TBBAR0    0x10
#define ENETC_TBBAR1    0x14
#define ENETC_TBPIR     0x18
#define ENETC_TBCIR     0x1c
#define ENETC_TBCIR_IDX_MASK    0xffff
#define ENETC_TBLENR    0x20
#define ENETC_TBIER     0xa0
#define ENETC_TBIER_TXTIE       BIT(0)
#define ENETC_TBIDR     0xa4
#define ENETC_TBICIR0   0xa8
#define ENETC_TBICIR0_ICEN      BIT(31)

#define ENETC_RTBLENR_LEN(n)    ((n) & ~0x7)

/* Port regs, offset: 1_0000h */
#define ENETC_PORT_BASE         0x10000
#define ENETC_PMR               0x0000
#define ENETC_PMR_EN    GENMASK(18, 16)
#define ENETC_PSR               0x0004 /* RO */
#define ENETC_PSIPMR            0x0018
#define ENETC_PSIPMR_SET_UP(n)  BIT(n) /* n = SI index */
#define ENETC_PSIPMR_SET_MP(n)  BIT((n) + 16)
#define ENETC_PSIPVMR           0x001c
#define ENETC_VLAN_PROMISC_MAP_ALL      0x7
#define ENETC_PSIPVMR_SET_VP(simap)     ((simap) & 0x7)
#define ENETC_PSIPVMR_SET_VUTA(simap)   (((simap) & 0x7) << 16)
#define ENETC_PSIPMAR0(n)       (0x0100 + (n) * 0x8) /* n = SI index */
#define ENETC_PSIPMAR1(n)       (0x0104 + (n) * 0x8)
#define ENETC_PVCLCTR           0x0208
#define ENETC_VLAN_TYPE_C       BIT(0)
#define ENETC_VLAN_TYPE_S       BIT(1)
#define ENETC_PVCLCTR_OVTPIDL(bmp)      ((bmp) & 0xff) /* VLAN_TYPE */
#define ENETC_PSIVLANR(n)       (0x0240 + (n) * 4) /* n = SI index */
#define ENETC_PSIVLAN_EN        BIT(31)
#define ENETC_PSIVLAN_SET_QOS(val)      ((u32)(val) << 12)
#define ENETC_PTXMBAR           0x0608
#define ENETC_PCAPR0            0x0900
#define ENETC_PCAPR0_RXBDR(val) ((val) >> 24)
#define ENETC_PCAPR0_TXBDR(val) (((val) >> 16) & 0xff)
#define ENETC_PCAPR1            0x0904
#define ENETC_PSICFGR0(n)       (0x0940 + (n) * 0xc)  /* n = SI index */
#define ENETC_PSICFGR0_SET_TXBDR(val)   ((val) & 0xff)
#define ENETC_PSICFGR0_SET_RXBDR(val)   (((val) & 0xff) << 16)
#define ENETC_PSICFGR0_VTE      BIT(12)
#define ENETC_PSICFGR0_SIVIE    BIT(14)
#define ENETC_PSICFGR0_ASE      BIT(15)
#define ENETC_PSICFGR0_SIVC(bmp)        (((bmp) & 0xff) << 24) /* VLAN_TYPE */

#define ENETC_PTCCBSR0(n)       (0x1110 + (n) * 8) /* n = 0 to 7*/
#define ENETC_PTCCBSR1(n)       (0x1114 + (n) * 8) /* n = 0 to 7*/
#define ENETC_RSSHASH_KEY_SIZE  40
#define ENETC_PRSSK(n)          (0x1410 + (n) * 4) /* n = [0..9] */
#define ENETC_PSIVLANFMR        0x1700
#define ENETC_PSIVLANFMR_VS     BIT(0)
#define ENETC_PRFSMR            0x1800
#define ENETC_PRFSMR_RFSE       BIT(31)
#define ENETC_PRFSCAPR          0x1804
#define ENETC_PRFSCAPR_GET_NUM_RFS(val) ((((val) & 0xf) + 1) * 16)
#define ENETC_PSIRFSCFGR(n)     (0x1814 + (n) * 4) /* n = SI index */
#define ENETC_PFPMR             0x1900
#define ENETC_PFPMR_PMACE       BIT(1)
#define ENETC_PFPMR_MWLM        BIT(0)
#define ENETC_PSIUMHFR0(n, err) (((err) ? 0x1d08 : 0x1d00) + (n) * 0x10)
#define ENETC_PSIUMHFR1(n)      (0x1d04 + (n) * 0x10)
#define ENETC_PSIMMHFR0(n, err) (((err) ? 0x1d00 : 0x1d08) + (n) * 0x10)
#define ENETC_PSIMMHFR1(n)      (0x1d0c + (n) * 0x10)
#define ENETC_PSIVHFR0(n)       (0x1e00 + (n) * 8) /* n = SI index */
#define ENETC_PSIVHFR1(n)       (0x1e04 + (n) * 8) /* n = SI index */
#define ENETC_MMCSR             0x1f00
#define ENETC_MMCSR_ME          BIT(16)
#define ENETC_PTCMSDUR(n)       (0x2020 + (n) * 4) /* n = TC index [0..7] */

#define ENETC_PM0_CMD_CFG       0x8008
#define ENETC_PM1_CMD_CFG       0x9008
#define ENETC_PM0_TX_EN         BIT(0)
#define ENETC_PM0_RX_EN         BIT(1)
#define ENETC_PM0_PROMISC       BIT(4)
#define ENETC_PM0_CMD_XGLP      BIT(10)
#define ENETC_PM0_CMD_TXP       BIT(11)
#define ENETC_PM0_CMD_PHY_TX_EN BIT(15)
#define ENETC_PM0_CMD_SFD       BIT(21)
#define ENETC_PM0_MAXFRM        0x8014
#define ENETC_SET_TX_MTU(val)   ((val) << 16)
#define ENETC_SET_MAXFRM(val)   ((val) & 0xffff)
#define ENETC_PM0_IF_MODE       0x8300
#define ENETC_PMO_IFM_RG        BIT(2)
#define ENETC_PM0_IFM_RLP       (BIT(5) | BIT(11))
#define ENETC_PM0_IFM_RGAUTO    (BIT(15) | ENETC_PMO_IFM_RG | BIT(1))
#define ENETC_PM0_IFM_XGMII     BIT(12)

/* MAC counters */
#define ENETC_PM0_REOCT         0x8100
#define ENETC_PM0_RALN          0x8110
#define ENETC_PM0_RXPF          0x8118
#define ENETC_PM0_RFRM          0x8120
#define ENETC_PM0_RFCS          0x8128
#define ENETC_PM0_RVLAN         0x8130
#define ENETC_PM0_RERR          0x8138
#define ENETC_PM0_RUCA          0x8140
#define ENETC_PM0_RMCA          0x8148
#define ENETC_PM0_RBCA          0x8150
#define ENETC_PM0_RDRP          0x8158
#define ENETC_PM0_RPKT          0x8160
#define ENETC_PM0_RUND          0x8168
#define ENETC_PM0_R64           0x8170
#define ENETC_PM0_R127          0x8178
#define ENETC_PM0_R255          0x8180
#define ENETC_PM0_R511          0x8188
#define ENETC_PM0_R1023         0x8190
#define ENETC_PM0_R1518         0x8198
#define ENETC_PM0_R1519X        0x81A0
#define ENETC_PM0_ROVR          0x81A8
#define ENETC_PM0_RJBR          0x81B0
#define ENETC_PM0_RFRG          0x81B8
#define ENETC_PM0_RCNP          0x81C0
#define ENETC_PM0_RDRNTP        0x81C8
#define ENETC_PM0_TEOCT         0x8200
#define ENETC_PM0_TOCT          0x8208
#define ENETC_PM0_TCRSE         0x8210
#define ENETC_PM0_TXPF          0x8218
#define ENETC_PM0_TFRM          0x8220
#define ENETC_PM0_TFCS          0x8228
#define ENETC_PM0_TVLAN         0x8230
#define ENETC_PM0_TERR          0x8238
#define ENETC_PM0_TUCA          0x8240
#define ENETC_PM0_TMCA          0x8248
#define ENETC_PM0_TBCA          0x8250
#define ENETC_PM0_TPKT          0x8260
#define ENETC_PM0_TUND          0x8268
#define ENETC_PM0_T127          0x8278
#define ENETC_PM0_T1023         0x8290
#define ENETC_PM0_T1518         0x8298
#define ENETC_PM0_TCNP          0x82C0
#define ENETC_PM0_TDFR          0x82D0
#define ENETC_PM0_TMCOL         0x82D8
#define ENETC_PM0_TSCOL         0x82E0
#define ENETC_PM0_TLCOL         0x82E8
#define ENETC_PM0_TECOL         0x82F0

/* Port counters */
#define ENETC_PICDR(n)          (0x0700 + (n) * 8) /* n = [0..3] */
#define ENETC_PBFDSIR           0x0810
#define ENETC_PFDMSAPR          0x0814
#define ENETC_UFDMF             0x1680
#define ENETC_MFDMF             0x1684
#define ENETC_PUFDVFR           0x1780
#define ENETC_PMFDVFR           0x1784
#define ENETC_PBFDVFR           0x1788

/** Global regs, offset: 2_0000h */
#define ENETC_GLOBAL_BASE       0x20000
#define ENETC_G_EIPBRR0         0x0bf8
#define ENETC_G_EIPBRR1         0x0bfc
#define ENETC_G_EPFBLPR(n)      (0xd00 + 4 * (n))
#define ENETC_G_EPFBLPR1_XGMII  0x80000000

/* PCI device info */
struct enetc_hw {
        /* SI registers, used by all PCI functions */
        void __iomem *reg;
        /* Port registers, PF only */
        void __iomem *port;
        /* IP global registers, PF only */
        void __iomem *global;
};

/* general register accessors */
#define enetc_rd_reg(reg)       ioread32((reg))
#define enetc_wr_reg(reg, val)  iowrite32((val), (reg))
#ifdef ioread64
#define enetc_rd_reg64(reg)     ioread64((reg))
#else
/* using this to read out stats on 32b systems */
static inline u64 enetc_rd_reg64(void __iomem *reg)
{
        u32 low, high, tmp;

        do {
                high = ioread32(reg + 4);
                low = ioread32(reg);
                tmp = ioread32(reg + 4);
        } while (high != tmp);

        return le64_to_cpu((__le64)high << 32 | low);
}
#endif

#define enetc_rd(hw, off)               enetc_rd_reg((hw)->reg + (off))
#define enetc_wr(hw, off, val)          enetc_wr_reg((hw)->reg + (off), val)
#define enetc_rd64(hw, off)             enetc_rd_reg64((hw)->reg + (off))
/* port register accessors - PF only */
#define enetc_port_rd(hw, off)          enetc_rd_reg((hw)->port + (off))
#define enetc_port_wr(hw, off, val)     enetc_wr_reg((hw)->port + (off), val)
/* global register accessors - PF only */
#define enetc_global_rd(hw, off)        enetc_rd_reg((hw)->global + (off))
#define enetc_global_wr(hw, off, val)   enetc_wr_reg((hw)->global + (off), val)
/* BDR register accessors, see ENETC_BDR() */
#define enetc_bdr_rd(hw, t, n, off) \
                                enetc_rd(hw, ENETC_BDR(t, n, off))
#define enetc_bdr_wr(hw, t, n, off, val) \
                                enetc_wr(hw, ENETC_BDR(t, n, off), val)
#define enetc_txbdr_rd(hw, n, off) enetc_bdr_rd(hw, TX, n, off)
#define enetc_rxbdr_rd(hw, n, off) enetc_bdr_rd(hw, RX, n, off)
#define enetc_txbdr_wr(hw, n, off, val) \
                                enetc_bdr_wr(hw, TX, n, off, val)
#define enetc_rxbdr_wr(hw, n, off, val) \
                                enetc_bdr_wr(hw, RX, n, off, val)

/* Buffer Descriptors (BD) */
union enetc_tx_bd {
        struct {
                __le64 addr;
                __le16 buf_len;
                __le16 frm_len;
                union {
                        struct {
                                __le16 l3_csoff;
                                u8 l4_csoff;
                                u8 flags;
                        }; /* default layout */
                        __le32 lstatus;
                };
        };
        struct {
                __le32 tstamp;
                __le16 tpid;
                __le16 vid;
                u8 reserved[6];
                u8 e_flags;
                u8 flags;
        } ext; /* Tx BD extension */
};

#define ENETC_TXBD_FLAGS_L4CS   BIT(0)
#define ENETC_TXBD_FLAGS_W      BIT(2)
#define ENETC_TXBD_FLAGS_CSUM   BIT(3)
#define ENETC_TXBD_FLAGS_EX     BIT(6)
#define ENETC_TXBD_FLAGS_F      BIT(7)

static inline void enetc_clear_tx_bd(union enetc_tx_bd *txbd)
{
        memset(txbd, 0, sizeof(*txbd));
}

/* L3 csum flags */
#define ENETC_TXBD_L3_IPCS      BIT(7)
#define ENETC_TXBD_L3_IPV6      BIT(15)

#define ENETC_TXBD_L3_START_MASK        GENMASK(6, 0)
#define ENETC_TXBD_L3_SET_HSIZE(val)    ((((val) >> 2) & 0x7f) << 8)

/* Extension flags */
#define ENETC_TXBD_E_FLAGS_VLAN_INS     BIT(0)
#define ENETC_TXBD_E_FLAGS_TWO_STEP_PTP BIT(2)

static inline __le16 enetc_txbd_l3_csoff(int start, int hdr_sz, u16 l3_flags)
{
        return cpu_to_le16(l3_flags | ENETC_TXBD_L3_SET_HSIZE(hdr_sz) |
                           (start & ENETC_TXBD_L3_START_MASK));
}

/* L4 csum flags */
#define ENETC_TXBD_L4_UDP       BIT(5)
#define ENETC_TXBD_L4_TCP       BIT(6)

union enetc_rx_bd {
        struct {
                __le64 addr;
                u8 reserved[8];
        } w;
        struct {
                __le16 inet_csum;
                __le16 parse_summary;
                __le32 rss_hash;
                __le16 buf_len;
                __le16 vlan_opt;
                union {
                        struct {
                                __le16 flags;
                                __le16 error;
                        };
                        __le32 lstatus;
                };
        } r;
};

#define ENETC_RXBD_LSTATUS_R    BIT(30)
#define ENETC_RXBD_LSTATUS_F    BIT(31)
#define ENETC_RXBD_ERR_MASK     0xff
#define ENETC_RXBD_LSTATUS(flags)       ((flags) << 16)
#define ENETC_RXBD_FLAG_VLAN    BIT(9)
#define ENETC_RXBD_FLAG_TSTMP   BIT(10)

#define ENETC_MAC_ADDR_FILT_CNT 8 /* # of supported entries per port */
#define EMETC_MAC_ADDR_FILT_RES 3 /* # of reserved entries at the beginning */
#define ENETC_MAX_NUM_VFS       2

struct enetc_cbd {
        union {
                struct {
                        __le32 addr[2];
                        __le32 opt[4];
                };
                __le32 data[6];
        };
        __le16 index;
        __le16 length;
        u8 cmd;
        u8 cls;
        u8 _res;
        u8 status_flags;
};

#define ENETC_CBD_FLAGS_SF      BIT(7) /* short format */
#define ENETC_CBD_STATUS_MASK   0xf

struct enetc_cmd_rfse {
        u8 smac_h[6];
        u8 smac_m[6];
        u8 dmac_h[6];
        u8 dmac_m[6];
        u32 sip_h[4];
        u32 sip_m[4];
        u32 dip_h[4];
        u32 dip_m[4];
        u16 ethtype_h;
        u16 ethtype_m;
        u16 ethtype4_h;
        u16 ethtype4_m;
        u16 sport_h;
        u16 sport_m;
        u16 dport_h;
        u16 dport_m;
        u16 vlan_h;
        u16 vlan_m;
        u8 proto_h;
        u8 proto_m;
        u16 flags;
        u16 result;
        u16 mode;
};

#define ENETC_RFSE_EN   BIT(15)
#define ENETC_RFSE_MODE_BD      2

static inline void enetc_get_primary_mac_addr(struct enetc_hw *hw, u8 *addr)
{
        *(u32 *)addr = __raw_readl(hw->reg + ENETC_SIPMAR0);
        *(u16 *)(addr + 4) = __raw_readw(hw->reg + ENETC_SIPMAR1);
}

#define ENETC_SI_INT_IDX        0
/* base index for Rx/Tx interrupts */
#define ENETC_BDR_INT_BASE_IDX  1

/* Messaging */

/* Command completion status */
enum enetc_msg_cmd_status {
        ENETC_MSG_CMD_STATUS_OK,
        ENETC_MSG_CMD_STATUS_FAIL
};

/* VSI-PSI command message types */
enum enetc_msg_cmd_type {
        ENETC_MSG_CMD_MNG_MAC = 1, /* manage MAC address */
        ENETC_MSG_CMD_MNG_RX_MAC_FILTER,/* manage RX MAC table */
        ENETC_MSG_CMD_MNG_RX_VLAN_FILTER /* manage RX VLAN table */
};

/* VSI-PSI command action types */
enum enetc_msg_cmd_action_type {
        ENETC_MSG_CMD_MNG_ADD = 1,
        ENETC_MSG_CMD_MNG_REMOVE
};

/* PSI-VSI command header format */
struct enetc_msg_cmd_header {
        u16 type;       /* command class type */
        u16 id;         /* denotes the specific required action */
};

/* Common H/W utility functions */

static inline void enetc_enable_rxvlan(struct enetc_hw *hw, int si_idx,
                                       bool en)
{
        u32 val = enetc_rxbdr_rd(hw, si_idx, ENETC_RBMR);

        val = (val & ~ENETC_RBMR_VTE) | (en ? ENETC_RBMR_VTE : 0);
        enetc_rxbdr_wr(hw, si_idx, ENETC_RBMR, val);
}

static inline void enetc_enable_txvlan(struct enetc_hw *hw, int si_idx,
                                       bool en)
{
        u32 val = enetc_txbdr_rd(hw, si_idx, ENETC_TBMR);

        val = (val & ~ENETC_TBMR_VIH) | (en ? ENETC_TBMR_VIH : 0);
        enetc_txbdr_wr(hw, si_idx, ENETC_TBMR, val);
}