slip: Fix use-after-free Read in slip_open

[mirror_ubuntu-jammy-kernel.git] / drivers / net / ethernet / broadcom / genet / bcmgenet.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2014-2017 Broadcom
 */

#ifndef __BCMGENET_H__
#define __BCMGENET_H__

#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/clk.h>
#include <linux/mii.h>
#include <linux/if_vlan.h>
#include <linux/phy.h>
#include <linux/dim.h>

/* total number of Buffer Descriptors, same for Rx/Tx */
#define TOTAL_DESC                              256

/* which ring is descriptor based */
#define DESC_INDEX                              16

/* Body(1500) + EH_SIZE(14) + VLANTAG(4) + BRCMTAG(6) + FCS(4) = 1528.
 * 1536 is multiple of 256 bytes
 */
#define ENET_BRCM_TAG_LEN       6
#define ENET_PAD                8
#define ENET_MAX_MTU_SIZE       (ETH_DATA_LEN + ETH_HLEN + VLAN_HLEN + \
                                 ENET_BRCM_TAG_LEN + ETH_FCS_LEN + ENET_PAD)
#define DMA_MAX_BURST_LENGTH    0x10

/* misc. configuration */
#define CLEAR_ALL_HFB                   0xFF
#define DMA_FC_THRESH_HI                (TOTAL_DESC >> 4)
#define DMA_FC_THRESH_LO                5

/* 64B receive/transmit status block */
struct status_64 {
        u32     length_status;          /* length and peripheral status */
        u32     ext_status;             /* Extended status*/
        u32     rx_csum;                /* partial rx checksum */
        u32     unused1[9];             /* unused */
        u32     tx_csum_info;           /* Tx checksum info. */
        u32     unused2[3];             /* unused */
};

/* Rx status bits */
#define STATUS_RX_EXT_MASK              0x1FFFFF
#define STATUS_RX_CSUM_MASK             0xFFFF
#define STATUS_RX_CSUM_OK               0x10000
#define STATUS_RX_CSUM_FR               0x20000
#define STATUS_RX_PROTO_TCP             0
#define STATUS_RX_PROTO_UDP             1
#define STATUS_RX_PROTO_ICMP            2
#define STATUS_RX_PROTO_OTHER           3
#define STATUS_RX_PROTO_MASK            3
#define STATUS_RX_PROTO_SHIFT           18
#define STATUS_FILTER_INDEX_MASK        0xFFFF
/* Tx status bits */
#define STATUS_TX_CSUM_START_MASK       0X7FFF
#define STATUS_TX_CSUM_START_SHIFT      16
#define STATUS_TX_CSUM_PROTO_UDP        0x8000
#define STATUS_TX_CSUM_OFFSET_MASK      0x7FFF
#define STATUS_TX_CSUM_LV               0x80000000

/* DMA Descriptor */
#define DMA_DESC_LENGTH_STATUS  0x00    /* in bytes of data in buffer */
#define DMA_DESC_ADDRESS_LO     0x04    /* lower bits of PA */
#define DMA_DESC_ADDRESS_HI     0x08    /* upper 32 bits of PA, GENETv4+ */

/* Rx/Tx common counter group */
struct bcmgenet_pkt_counters {
        u32     cnt_64;         /* RO Received/Transmited 64 bytes packet */
        u32     cnt_127;        /* RO Rx/Tx 127 bytes packet */
        u32     cnt_255;        /* RO Rx/Tx 65-255 bytes packet */
        u32     cnt_511;        /* RO Rx/Tx 256-511 bytes packet */
        u32     cnt_1023;       /* RO Rx/Tx 512-1023 bytes packet */
        u32     cnt_1518;       /* RO Rx/Tx 1024-1518 bytes packet */
        u32     cnt_mgv;        /* RO Rx/Tx 1519-1522 good VLAN packet */
        u32     cnt_2047;       /* RO Rx/Tx 1522-2047 bytes packet*/
        u32     cnt_4095;       /* RO Rx/Tx 2048-4095 bytes packet*/
        u32     cnt_9216;       /* RO Rx/Tx 4096-9216 bytes packet*/
};

/* RSV, Receive Status Vector */
struct bcmgenet_rx_counters {
        struct  bcmgenet_pkt_counters pkt_cnt;
        u32     pkt;            /* RO (0x428) Received pkt count*/
        u32     bytes;          /* RO Received byte count */
        u32     mca;            /* RO # of Received multicast pkt */
        u32     bca;            /* RO # of Receive broadcast pkt */
        u32     fcs;            /* RO # of Received FCS error  */
        u32     cf;             /* RO # of Received control frame pkt*/
        u32     pf;             /* RO # of Received pause frame pkt */
        u32     uo;             /* RO # of unknown op code pkt */
        u32     aln;            /* RO # of alignment error count */
        u32     flr;            /* RO # of frame length out of range count */
        u32     cde;            /* RO # of code error pkt */
        u32     fcr;            /* RO # of carrier sense error pkt */
        u32     ovr;            /* RO # of oversize pkt*/
        u32     jbr;            /* RO # of jabber count */
        u32     mtue;           /* RO # of MTU error pkt*/
        u32     pok;            /* RO # of Received good pkt */
        u32     uc;             /* RO # of unicast pkt */
        u32     ppp;            /* RO # of PPP pkt */
        u32     rcrc;           /* RO (0x470),# of CRC match pkt */
};

/* TSV, Transmit Status Vector */
struct bcmgenet_tx_counters {
        struct bcmgenet_pkt_counters pkt_cnt;
        u32     pkts;           /* RO (0x4a8) Transmited pkt */
        u32     mca;            /* RO # of xmited multicast pkt */
        u32     bca;            /* RO # of xmited broadcast pkt */
        u32     pf;             /* RO # of xmited pause frame count */
        u32     cf;             /* RO # of xmited control frame count */
        u32     fcs;            /* RO # of xmited FCS error count */
        u32     ovr;            /* RO # of xmited oversize pkt */
        u32     drf;            /* RO # of xmited deferral pkt */
        u32     edf;            /* RO # of xmited Excessive deferral pkt*/
        u32     scl;            /* RO # of xmited single collision pkt */
        u32     mcl;            /* RO # of xmited multiple collision pkt*/
        u32     lcl;            /* RO # of xmited late collision pkt */
        u32     ecl;            /* RO # of xmited excessive collision pkt*/
        u32     frg;            /* RO # of xmited fragments pkt*/
        u32     ncl;            /* RO # of xmited total collision count */
        u32     jbr;            /* RO # of xmited jabber count*/
        u32     bytes;          /* RO # of xmited byte count */
        u32     pok;            /* RO # of xmited good pkt */
        u32     uc;             /* RO (0x0x4f0)# of xmited unitcast pkt */
};

struct bcmgenet_mib_counters {
        struct bcmgenet_rx_counters rx;
        struct bcmgenet_tx_counters tx;
        u32     rx_runt_cnt;
        u32     rx_runt_fcs;
        u32     rx_runt_fcs_align;
        u32     rx_runt_bytes;
        u32     rbuf_ovflow_cnt;
        u32     rbuf_err_cnt;
        u32     mdf_err_cnt;
        u32     alloc_rx_buff_failed;
        u32     rx_dma_failed;
        u32     tx_dma_failed;
};

#define UMAC_HD_BKP_CTRL                0x004
#define  HD_FC_EN                       (1 << 0)
#define  HD_FC_BKOFF_OK                 (1 << 1)
#define  IPG_CONFIG_RX_SHIFT            2
#define  IPG_CONFIG_RX_MASK             0x1F

#define UMAC_CMD                        0x008
#define  CMD_TX_EN                      (1 << 0)
#define  CMD_RX_EN                      (1 << 1)
#define  UMAC_SPEED_10                  0
#define  UMAC_SPEED_100                 1
#define  UMAC_SPEED_1000                2
#define  UMAC_SPEED_2500                3
#define  CMD_SPEED_SHIFT                2
#define  CMD_SPEED_MASK                 3
#define  CMD_PROMISC                    (1 << 4)
#define  CMD_PAD_EN                     (1 << 5)
#define  CMD_CRC_FWD                    (1 << 6)
#define  CMD_PAUSE_FWD                  (1 << 7)
#define  CMD_RX_PAUSE_IGNORE            (1 << 8)
#define  CMD_TX_ADDR_INS                (1 << 9)
#define  CMD_HD_EN                      (1 << 10)
#define  CMD_SW_RESET                   (1 << 13)
#define  CMD_LCL_LOOP_EN                (1 << 15)
#define  CMD_AUTO_CONFIG                (1 << 22)
#define  CMD_CNTL_FRM_EN                (1 << 23)
#define  CMD_NO_LEN_CHK                 (1 << 24)
#define  CMD_RMT_LOOP_EN                (1 << 25)
#define  CMD_PRBL_EN                    (1 << 27)
#define  CMD_TX_PAUSE_IGNORE            (1 << 28)
#define  CMD_TX_RX_EN                   (1 << 29)
#define  CMD_RUNT_FILTER_DIS            (1 << 30)

#define UMAC_MAC0                       0x00C
#define UMAC_MAC1                       0x010
#define UMAC_MAX_FRAME_LEN              0x014

#define UMAC_MODE                       0x44
#define  MODE_LINK_STATUS               (1 << 5)

#define UMAC_EEE_CTRL                   0x064
#define  EN_LPI_RX_PAUSE                (1 << 0)
#define  EN_LPI_TX_PFC                  (1 << 1)
#define  EN_LPI_TX_PAUSE                (1 << 2)
#define  EEE_EN                         (1 << 3)
#define  RX_FIFO_CHECK                  (1 << 4)
#define  EEE_TX_CLK_DIS                 (1 << 5)
#define  DIS_EEE_10M                    (1 << 6)
#define  LP_IDLE_PREDICTION_MODE        (1 << 7)

#define UMAC_EEE_LPI_TIMER              0x068
#define UMAC_EEE_WAKE_TIMER             0x06C
#define UMAC_EEE_REF_COUNT              0x070
#define  EEE_REFERENCE_COUNT_MASK       0xffff

#define UMAC_TX_FLUSH                   0x334

#define UMAC_MIB_START                  0x400

#define UMAC_MDIO_CMD                   0x614
#define  MDIO_START_BUSY                (1 << 29)
#define  MDIO_READ_FAIL                 (1 << 28)
#define  MDIO_RD                        (2 << 26)
#define  MDIO_WR                        (1 << 26)
#define  MDIO_PMD_SHIFT                 21
#define  MDIO_PMD_MASK                  0x1F
#define  MDIO_REG_SHIFT                 16
#define  MDIO_REG_MASK                  0x1F

#define UMAC_RBUF_OVFL_CNT_V1           0x61C
#define RBUF_OVFL_CNT_V2                0x80
#define RBUF_OVFL_CNT_V3PLUS            0x94

#define UMAC_MPD_CTRL                   0x620
#define  MPD_EN                         (1 << 0)
#define  MPD_PW_EN                      (1 << 27)
#define  MPD_MSEQ_LEN_SHIFT             16
#define  MPD_MSEQ_LEN_MASK              0xFF

#define UMAC_MPD_PW_MS                  0x624
#define UMAC_MPD_PW_LS                  0x628
#define UMAC_RBUF_ERR_CNT_V1            0x634
#define RBUF_ERR_CNT_V2                 0x84
#define RBUF_ERR_CNT_V3PLUS             0x98
#define UMAC_MDF_ERR_CNT                0x638
#define UMAC_MDF_CTRL                   0x650
#define UMAC_MDF_ADDR                   0x654
#define UMAC_MIB_CTRL                   0x580
#define  MIB_RESET_RX                   (1 << 0)
#define  MIB_RESET_RUNT                 (1 << 1)
#define  MIB_RESET_TX                   (1 << 2)

#define RBUF_CTRL                       0x00
#define  RBUF_64B_EN                    (1 << 0)
#define  RBUF_ALIGN_2B                  (1 << 1)
#define  RBUF_BAD_DIS                   (1 << 2)

#define RBUF_STATUS                     0x0C
#define  RBUF_STATUS_WOL                (1 << 0)
#define  RBUF_STATUS_MPD_INTR_ACTIVE    (1 << 1)
#define  RBUF_STATUS_ACPI_INTR_ACTIVE   (1 << 2)

#define RBUF_CHK_CTRL                   0x14
#define  RBUF_RXCHK_EN                  (1 << 0)
#define  RBUF_SKIP_FCS                  (1 << 4)

#define RBUF_ENERGY_CTRL                0x9c
#define  RBUF_EEE_EN                    (1 << 0)
#define  RBUF_PM_EN                     (1 << 1)

#define RBUF_TBUF_SIZE_CTRL             0xb4

#define RBUF_HFB_CTRL_V1                0x38
#define  RBUF_HFB_FILTER_EN_SHIFT       16
#define  RBUF_HFB_FILTER_EN_MASK        0xffff0000
#define  RBUF_HFB_EN                    (1 << 0)
#define  RBUF_HFB_256B                  (1 << 1)
#define  RBUF_ACPI_EN                   (1 << 2)

#define RBUF_HFB_LEN_V1                 0x3C
#define  RBUF_FLTR_LEN_MASK             0xFF
#define  RBUF_FLTR_LEN_SHIFT            8

#define TBUF_CTRL                       0x00
#define TBUF_BP_MC                      0x0C
#define TBUF_ENERGY_CTRL                0x14
#define  TBUF_EEE_EN                    (1 << 0)
#define  TBUF_PM_EN                     (1 << 1)

#define TBUF_CTRL_V1                    0x80
#define TBUF_BP_MC_V1                   0xA0

#define HFB_CTRL                        0x00
#define HFB_FLT_ENABLE_V3PLUS           0x04
#define HFB_FLT_LEN_V2                  0x04
#define HFB_FLT_LEN_V3PLUS              0x1C

/* uniMac intrl2 registers */
#define INTRL2_CPU_STAT                 0x00
#define INTRL2_CPU_SET                  0x04
#define INTRL2_CPU_CLEAR                0x08
#define INTRL2_CPU_MASK_STATUS          0x0C
#define INTRL2_CPU_MASK_SET             0x10
#define INTRL2_CPU_MASK_CLEAR           0x14

/* INTRL2 instance 0 definitions */
#define UMAC_IRQ_SCB                    (1 << 0)
#define UMAC_IRQ_EPHY                   (1 << 1)
#define UMAC_IRQ_PHY_DET_R              (1 << 2)
#define UMAC_IRQ_PHY_DET_F              (1 << 3)
#define UMAC_IRQ_LINK_UP                (1 << 4)
#define UMAC_IRQ_LINK_DOWN              (1 << 5)
#define UMAC_IRQ_LINK_EVENT             (UMAC_IRQ_LINK_UP | UMAC_IRQ_LINK_DOWN)
#define UMAC_IRQ_UMAC                   (1 << 6)
#define UMAC_IRQ_UMAC_TSV               (1 << 7)
#define UMAC_IRQ_TBUF_UNDERRUN          (1 << 8)
#define UMAC_IRQ_RBUF_OVERFLOW          (1 << 9)
#define UMAC_IRQ_HFB_SM                 (1 << 10)
#define UMAC_IRQ_HFB_MM                 (1 << 11)
#define UMAC_IRQ_MPD_R                  (1 << 12)
#define UMAC_IRQ_RXDMA_MBDONE           (1 << 13)
#define UMAC_IRQ_RXDMA_PDONE            (1 << 14)
#define UMAC_IRQ_RXDMA_BDONE            (1 << 15)
#define UMAC_IRQ_RXDMA_DONE             UMAC_IRQ_RXDMA_MBDONE
#define UMAC_IRQ_TXDMA_MBDONE           (1 << 16)
#define UMAC_IRQ_TXDMA_PDONE            (1 << 17)
#define UMAC_IRQ_TXDMA_BDONE            (1 << 18)
#define UMAC_IRQ_TXDMA_DONE             UMAC_IRQ_TXDMA_MBDONE

/* Only valid for GENETv3+ */
#define UMAC_IRQ_MDIO_DONE              (1 << 23)
#define UMAC_IRQ_MDIO_ERROR             (1 << 24)

/* INTRL2 instance 1 definitions */
#define UMAC_IRQ1_TX_INTR_MASK          0xFFFF
#define UMAC_IRQ1_RX_INTR_MASK          0xFFFF
#define UMAC_IRQ1_RX_INTR_SHIFT         16

/* Register block offsets */
#define GENET_SYS_OFF                   0x0000
#define GENET_GR_BRIDGE_OFF             0x0040
#define GENET_EXT_OFF                   0x0080
#define GENET_INTRL2_0_OFF              0x0200
#define GENET_INTRL2_1_OFF              0x0240
#define GENET_RBUF_OFF                  0x0300
#define GENET_UMAC_OFF                  0x0800

/* SYS block offsets and register definitions */
#define SYS_REV_CTRL                    0x00
#define SYS_PORT_CTRL                   0x04
#define  PORT_MODE_INT_EPHY             0
#define  PORT_MODE_INT_GPHY             1
#define  PORT_MODE_EXT_EPHY             2
#define  PORT_MODE_EXT_GPHY             3
#define  PORT_MODE_EXT_RVMII_25         (4 | BIT(4))
#define  PORT_MODE_EXT_RVMII_50         4
#define  LED_ACT_SOURCE_MAC             (1 << 9)

#define SYS_RBUF_FLUSH_CTRL             0x08
#define SYS_TBUF_FLUSH_CTRL             0x0C
#define RBUF_FLUSH_CTRL_V1              0x04

/* Ext block register offsets and definitions */
#define EXT_EXT_PWR_MGMT                0x00
#define  EXT_PWR_DOWN_BIAS              (1 << 0)
#define  EXT_PWR_DOWN_DLL               (1 << 1)
#define  EXT_PWR_DOWN_PHY               (1 << 2)
#define  EXT_PWR_DN_EN_LD               (1 << 3)
#define  EXT_ENERGY_DET                 (1 << 4)
#define  EXT_IDDQ_FROM_PHY              (1 << 5)
#define  EXT_IDDQ_GLBL_PWR              (1 << 7)
#define  EXT_PHY_RESET                  (1 << 8)
#define  EXT_ENERGY_DET_MASK            (1 << 12)
#define  EXT_PWR_DOWN_PHY_TX            (1 << 16)
#define  EXT_PWR_DOWN_PHY_RX            (1 << 17)
#define  EXT_PWR_DOWN_PHY_SD            (1 << 18)
#define  EXT_PWR_DOWN_PHY_RD            (1 << 19)
#define  EXT_PWR_DOWN_PHY_EN            (1 << 20)

#define EXT_RGMII_OOB_CTRL              0x0C
#define  RGMII_MODE_EN_V123             (1 << 0)
#define  RGMII_LINK                     (1 << 4)
#define  OOB_DISABLE                    (1 << 5)
#define  RGMII_MODE_EN                  (1 << 6)
#define  ID_MODE_DIS                    (1 << 16)

#define EXT_GPHY_CTRL                   0x1C
#define  EXT_CFG_IDDQ_BIAS              (1 << 0)
#define  EXT_CFG_PWR_DOWN               (1 << 1)
#define  EXT_CK25_DIS                   (1 << 4)
#define  EXT_GPHY_RESET                 (1 << 5)

/* DMA rings size */
#define DMA_RING_SIZE                   (0x40)
#define DMA_RINGS_SIZE                  (DMA_RING_SIZE * (DESC_INDEX + 1))

/* DMA registers common definitions */
#define DMA_RW_POINTER_MASK             0x1FF
#define DMA_P_INDEX_DISCARD_CNT_MASK    0xFFFF
#define DMA_P_INDEX_DISCARD_CNT_SHIFT   16
#define DMA_BUFFER_DONE_CNT_MASK        0xFFFF
#define DMA_BUFFER_DONE_CNT_SHIFT       16
#define DMA_P_INDEX_MASK                0xFFFF
#define DMA_C_INDEX_MASK                0xFFFF

/* DMA ring size register */
#define DMA_RING_SIZE_MASK              0xFFFF
#define DMA_RING_SIZE_SHIFT             16
#define DMA_RING_BUFFER_SIZE_MASK       0xFFFF

/* DMA interrupt threshold register */
#define DMA_INTR_THRESHOLD_MASK         0x01FF

/* DMA XON/XOFF register */
#define DMA_XON_THREHOLD_MASK           0xFFFF
#define DMA_XOFF_THRESHOLD_MASK         0xFFFF
#define DMA_XOFF_THRESHOLD_SHIFT        16

/* DMA flow period register */
#define DMA_FLOW_PERIOD_MASK            0xFFFF
#define DMA_MAX_PKT_SIZE_MASK           0xFFFF
#define DMA_MAX_PKT_SIZE_SHIFT          16


/* DMA control register */
#define DMA_EN                          (1 << 0)
#define DMA_RING_BUF_EN_SHIFT           0x01
#define DMA_RING_BUF_EN_MASK            0xFFFF
#define DMA_TSB_SWAP_EN                 (1 << 20)

/* DMA status register */
#define DMA_DISABLED                    (1 << 0)
#define DMA_DESC_RAM_INIT_BUSY          (1 << 1)

/* DMA SCB burst size register */
#define DMA_SCB_BURST_SIZE_MASK         0x1F

/* DMA activity vector register */
#define DMA_ACTIVITY_VECTOR_MASK        0x1FFFF

/* DMA backpressure mask register */
#define DMA_BACKPRESSURE_MASK           0x1FFFF
#define DMA_PFC_ENABLE                  (1 << 31)

/* DMA backpressure status register */
#define DMA_BACKPRESSURE_STATUS_MASK    0x1FFFF

/* DMA override register */
#define DMA_LITTLE_ENDIAN_MODE          (1 << 0)
#define DMA_REGISTER_MODE               (1 << 1)

/* DMA timeout register */
#define DMA_TIMEOUT_MASK                0xFFFF
#define DMA_TIMEOUT_VAL                 5000    /* micro seconds */

/* TDMA rate limiting control register */
#define DMA_RATE_LIMIT_EN_MASK          0xFFFF

/* TDMA arbitration control register */
#define DMA_ARBITER_MODE_MASK           0x03
#define DMA_RING_BUF_PRIORITY_MASK      0x1F
#define DMA_RING_BUF_PRIORITY_SHIFT     5
#define DMA_PRIO_REG_INDEX(q)           ((q) / 6)
#define DMA_PRIO_REG_SHIFT(q)           (((q) % 6) * DMA_RING_BUF_PRIORITY_SHIFT)
#define DMA_RATE_ADJ_MASK               0xFF

/* Tx/Rx Dma Descriptor common bits*/
#define DMA_BUFLENGTH_MASK              0x0fff
#define DMA_BUFLENGTH_SHIFT             16
#define DMA_OWN                         0x8000
#define DMA_EOP                         0x4000
#define DMA_SOP                         0x2000
#define DMA_WRAP                        0x1000
/* Tx specific Dma descriptor bits */
#define DMA_TX_UNDERRUN                 0x0200
#define DMA_TX_APPEND_CRC               0x0040
#define DMA_TX_OW_CRC                   0x0020
#define DMA_TX_DO_CSUM                  0x0010
#define DMA_TX_QTAG_SHIFT               7

/* Rx Specific Dma descriptor bits */
#define DMA_RX_CHK_V3PLUS               0x8000
#define DMA_RX_CHK_V12                  0x1000
#define DMA_RX_BRDCAST                  0x0040
#define DMA_RX_MULT                     0x0020
#define DMA_RX_LG                       0x0010
#define DMA_RX_NO                       0x0008
#define DMA_RX_RXER                     0x0004
#define DMA_RX_CRC_ERROR                0x0002
#define DMA_RX_OV                       0x0001
#define DMA_RX_FI_MASK                  0x001F
#define DMA_RX_FI_SHIFT                 0x0007
#define DMA_DESC_ALLOC_MASK             0x00FF

#define DMA_ARBITER_RR                  0x00
#define DMA_ARBITER_WRR                 0x01
#define DMA_ARBITER_SP                  0x02

struct enet_cb {
        struct sk_buff      *skb;
        void __iomem *bd_addr;
        DEFINE_DMA_UNMAP_ADDR(dma_addr);
        DEFINE_DMA_UNMAP_LEN(dma_len);
};

/* power management mode */
enum bcmgenet_power_mode {
        GENET_POWER_CABLE_SENSE = 0,
        GENET_POWER_PASSIVE,
        GENET_POWER_WOL_MAGIC,
};

struct bcmgenet_priv;

/* We support both runtime GENET detection and compile-time
 * to optimize code-paths for a given hardware
 */
enum bcmgenet_version {
        GENET_V1 = 1,
        GENET_V2,
        GENET_V3,
        GENET_V4,
        GENET_V5
};

#define GENET_IS_V1(p)  ((p)->version == GENET_V1)
#define GENET_IS_V2(p)  ((p)->version == GENET_V2)
#define GENET_IS_V3(p)  ((p)->version == GENET_V3)
#define GENET_IS_V4(p)  ((p)->version == GENET_V4)
#define GENET_IS_V5(p)  ((p)->version == GENET_V5)

/* Hardware flags */
#define GENET_HAS_40BITS        (1 << 0)
#define GENET_HAS_EXT           (1 << 1)
#define GENET_HAS_MDIO_INTR     (1 << 2)
#define GENET_HAS_MOCA_LINK_DET (1 << 3)

/* BCMGENET hardware parameters, keep this structure nicely aligned
 * since it is going to be used in hot paths
 */
struct bcmgenet_hw_params {
        u8              tx_queues;
        u8              tx_bds_per_q;
        u8              rx_queues;
        u8              rx_bds_per_q;
        u8              bp_in_en_shift;
        u32             bp_in_mask;
        u8              hfb_filter_cnt;
        u8              hfb_filter_size;
        u8              qtag_mask;
        u16             tbuf_offset;
        u32             hfb_offset;
        u32             hfb_reg_offset;
        u32             rdma_offset;
        u32             tdma_offset;
        u32             words_per_bd;
        u32             flags;
};

struct bcmgenet_skb_cb {
        struct enet_cb *first_cb;       /* First control block of SKB */
        struct enet_cb *last_cb;        /* Last control block of SKB */
        unsigned int bytes_sent;        /* bytes on the wire (no TSB) */
};

#define GENET_CB(skb)   ((struct bcmgenet_skb_cb *)((skb)->cb))

struct bcmgenet_tx_ring {
        spinlock_t      lock;           /* ring lock */
        struct napi_struct napi;        /* NAPI per tx queue */
        unsigned long   packets;
        unsigned long   bytes;
        unsigned int    index;          /* ring index */
        unsigned int    queue;          /* queue index */
        struct enet_cb  *cbs;           /* tx ring buffer control block*/
        unsigned int    size;           /* size of each tx ring */
        unsigned int    clean_ptr;      /* Tx ring clean pointer */
        unsigned int    c_index;        /* last consumer index of each ring*/
        unsigned int    free_bds;       /* # of free bds for each ring */
        unsigned int    write_ptr;      /* Tx ring write pointer SW copy */
        unsigned int    prod_index;     /* Tx ring producer index SW copy */
        unsigned int    cb_ptr;         /* Tx ring initial CB ptr */
        unsigned int    end_ptr;        /* Tx ring end CB ptr */
        void (*int_enable)(struct bcmgenet_tx_ring *);
        void (*int_disable)(struct bcmgenet_tx_ring *);
        struct bcmgenet_priv *priv;
};

struct bcmgenet_net_dim {
        u16             use_dim;
        u16             event_ctr;
        unsigned long   packets;
        unsigned long   bytes;
        struct dim      dim;
};

struct bcmgenet_rx_ring {
        struct napi_struct napi;        /* Rx NAPI struct */
        unsigned long   bytes;
        unsigned long   packets;
        unsigned long   errors;
        unsigned long   dropped;
        unsigned int    index;          /* Rx ring index */
        struct enet_cb  *cbs;           /* Rx ring buffer control block */
        unsigned int    size;           /* Rx ring size */
        unsigned int    c_index;        /* Rx last consumer index */
        unsigned int    read_ptr;       /* Rx ring read pointer */
        unsigned int    cb_ptr;         /* Rx ring initial CB ptr */
        unsigned int    end_ptr;        /* Rx ring end CB ptr */
        unsigned int    old_discards;
        struct bcmgenet_net_dim dim;
        u32             rx_max_coalesced_frames;
        u32             rx_coalesce_usecs;
        void (*int_enable)(struct bcmgenet_rx_ring *);
        void (*int_disable)(struct bcmgenet_rx_ring *);
        struct bcmgenet_priv *priv;
};

/* device context */
struct bcmgenet_priv {
        void __iomem *base;
        enum bcmgenet_version version;
        struct net_device *dev;

        /* transmit variables */
        void __iomem *tx_bds;
        struct enet_cb *tx_cbs;
        unsigned int num_tx_bds;

        struct bcmgenet_tx_ring tx_rings[DESC_INDEX + 1];

        /* receive variables */
        void __iomem *rx_bds;
        struct enet_cb *rx_cbs;
        unsigned int num_rx_bds;
        unsigned int rx_buf_len;

        struct bcmgenet_rx_ring rx_rings[DESC_INDEX + 1];

        /* other misc variables */
        struct bcmgenet_hw_params *hw_params;

        /* MDIO bus variables */
        wait_queue_head_t wq;
        bool internal_phy;
        struct device_node *phy_dn;
        struct device_node *mdio_dn;
        struct mii_bus *mii_bus;
        u16 gphy_rev;
        struct clk *clk_eee;
        bool clk_eee_enabled;

        /* PHY device variables */
        int old_link;
        int old_speed;
        int old_duplex;
        int old_pause;
        phy_interface_t phy_interface;
        int phy_addr;
        int ext_phy;

        /* Interrupt variables */
        struct work_struct bcmgenet_irq_work;
        int irq0;
        int irq1;
        int wol_irq;
        bool wol_irq_disabled;

        /* shared status */
        spinlock_t lock;
        unsigned int irq0_stat;

        /* HW descriptors/checksum variables */
        bool desc_64b_en;
        bool desc_rxchk_en;
        bool crc_fwd_en;

        unsigned int dma_rx_chk_bit;

        u32 msg_enable;

        struct clk *clk;
        struct platform_device *pdev;
        struct platform_device *mii_pdev;

        /* WOL */
        struct clk *clk_wol;
        u32 wolopts;

        struct bcmgenet_mib_counters mib;

        struct ethtool_eee eee;
};

#define GENET_IO_MACRO(name, offset)                                    \
static inline u32 bcmgenet_##name##_readl(struct bcmgenet_priv *priv,   \
                                        u32 off)                        \
{                                                                       \
        /* MIPS chips strapped for BE will automagically configure the  \
         * peripheral registers for CPU-native byte order.              \
         */                                                             \
        if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) \
                return __raw_readl(priv->base + offset + off);          \
        else                                                            \
                return readl_relaxed(priv->base + offset + off);        \
}                                                                       \
static inline void bcmgenet_##name##_writel(struct bcmgenet_priv *priv, \
                                        u32 val, u32 off)               \
{                                                                       \
        if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) \
                __raw_writel(val, priv->base + offset + off);           \
        else                                                            \
                writel_relaxed(val, priv->base + offset + off);         \
}

GENET_IO_MACRO(ext, GENET_EXT_OFF);
GENET_IO_MACRO(umac, GENET_UMAC_OFF);
GENET_IO_MACRO(sys, GENET_SYS_OFF);

/* interrupt l2 registers accessors */
GENET_IO_MACRO(intrl2_0, GENET_INTRL2_0_OFF);
GENET_IO_MACRO(intrl2_1, GENET_INTRL2_1_OFF);

/* HFB register accessors  */
GENET_IO_MACRO(hfb, priv->hw_params->hfb_offset);

/* GENET v2+ HFB control and filter len helpers */
GENET_IO_MACRO(hfb_reg, priv->hw_params->hfb_reg_offset);

/* RBUF register accessors */
GENET_IO_MACRO(rbuf, GENET_RBUF_OFF);

/* MDIO routines */
int bcmgenet_mii_init(struct net_device *dev);
int bcmgenet_mii_config(struct net_device *dev, bool init);
int bcmgenet_mii_probe(struct net_device *dev);
void bcmgenet_mii_exit(struct net_device *dev);
void bcmgenet_phy_power_set(struct net_device *dev, bool enable);
void bcmgenet_mii_setup(struct net_device *dev);

/* Wake-on-LAN routines */
void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
                                enum bcmgenet_power_mode mode);
void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
                               enum bcmgenet_power_mode mode);

#endif /* __BCMGENET_H__ */