sfc: Add flag for stack-owned RX MAC filters

[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / broadcom / bgmac.h

#ifndef _BGMAC_H
#define _BGMAC_H

#define pr_fmt(fmt)             KBUILD_MODNAME ": " fmt

#define bgmac_err(bgmac, fmt, ...) \
        dev_err(&(bgmac)->core->dev, fmt, ##__VA_ARGS__)
#define bgmac_warn(bgmac, fmt, ...) \
        dev_warn(&(bgmac)->core->dev, fmt,  ##__VA_ARGS__)
#define bgmac_info(bgmac, fmt, ...) \
        dev_info(&(bgmac)->core->dev, fmt,  ##__VA_ARGS__)
#define bgmac_dbg(bgmac, fmt, ...) \
        dev_dbg(&(bgmac)->core->dev, fmt, ##__VA_ARGS__)

#include <linux/bcma/bcma.h>
#include <linux/netdevice.h>

#define BGMAC_DEV_CTL                           0x000
#define  BGMAC_DC_TSM                           0x00000002
#define  BGMAC_DC_CFCO                          0x00000004
#define  BGMAC_DC_RLSS                          0x00000008
#define  BGMAC_DC_MROR                          0x00000010
#define  BGMAC_DC_FCM_MASK                      0x00000060
#define  BGMAC_DC_FCM_SHIFT                     5
#define  BGMAC_DC_NAE                           0x00000080
#define  BGMAC_DC_TF                            0x00000100
#define  BGMAC_DC_RDS_MASK                      0x00030000
#define  BGMAC_DC_RDS_SHIFT                     16
#define  BGMAC_DC_TDS_MASK                      0x000c0000
#define  BGMAC_DC_TDS_SHIFT                     18
#define BGMAC_DEV_STATUS                        0x004           /* Configuration of the interface */
#define  BGMAC_DS_RBF                           0x00000001
#define  BGMAC_DS_RDF                           0x00000002
#define  BGMAC_DS_RIF                           0x00000004
#define  BGMAC_DS_TBF                           0x00000008
#define  BGMAC_DS_TDF                           0x00000010
#define  BGMAC_DS_TIF                           0x00000020
#define  BGMAC_DS_PO                            0x00000040
#define  BGMAC_DS_MM_MASK                       0x00000300      /* Mode of the interface */
#define  BGMAC_DS_MM_SHIFT                      8
#define BGMAC_BIST_STATUS                       0x00c
#define BGMAC_INT_STATUS                        0x020           /* Interrupt status */
#define  BGMAC_IS_MRO                           0x00000001
#define  BGMAC_IS_MTO                           0x00000002
#define  BGMAC_IS_TFD                           0x00000004
#define  BGMAC_IS_LS                            0x00000008
#define  BGMAC_IS_MDIO                          0x00000010
#define  BGMAC_IS_MR                            0x00000020
#define  BGMAC_IS_MT                            0x00000040
#define  BGMAC_IS_TO                            0x00000080
#define  BGMAC_IS_DESC_ERR                      0x00000400      /* Descriptor error */
#define  BGMAC_IS_DATA_ERR                      0x00000800      /* Data error */
#define  BGMAC_IS_DESC_PROT_ERR                 0x00001000      /* Descriptor protocol error */
#define  BGMAC_IS_RX_DESC_UNDERF                0x00002000      /* Receive descriptor underflow */
#define  BGMAC_IS_RX_F_OVERF                    0x00004000      /* Receive FIFO overflow */
#define  BGMAC_IS_TX_F_UNDERF                   0x00008000      /* Transmit FIFO underflow */
#define  BGMAC_IS_RX                            0x00010000      /* Interrupt for RX queue 0 */
#define  BGMAC_IS_TX0                           0x01000000      /* Interrupt for TX queue 0 */
#define  BGMAC_IS_TX1                           0x02000000      /* Interrupt for TX queue 1 */
#define  BGMAC_IS_TX2                           0x04000000      /* Interrupt for TX queue 2 */
#define  BGMAC_IS_TX3                           0x08000000      /* Interrupt for TX queue 3 */
#define  BGMAC_IS_TX_MASK                       0x0f000000
#define  BGMAC_IS_INTMASK                       0x0f01fcff
#define  BGMAC_IS_ERRMASK                       0x0000fc00
#define BGMAC_INT_MASK                          0x024           /* Interrupt mask */
#define BGMAC_GP_TIMER                          0x028
#define BGMAC_INT_RECV_LAZY                     0x100
#define  BGMAC_IRL_TO_MASK                      0x00ffffff
#define  BGMAC_IRL_FC_MASK                      0xff000000
#define  BGMAC_IRL_FC_SHIFT                     24              /* Shift the number of interrupts triggered per received frame */
#define BGMAC_FLOW_CTL_THRESH                   0x104           /* Flow control thresholds */
#define BGMAC_WRRTHRESH                         0x108
#define BGMAC_GMAC_IDLE_CNT_THRESH              0x10c
#define BGMAC_PHY_ACCESS                        0x180           /* PHY access address */
#define  BGMAC_PA_DATA_MASK                     0x0000ffff
#define  BGMAC_PA_ADDR_MASK                     0x001f0000
#define  BGMAC_PA_ADDR_SHIFT                    16
#define  BGMAC_PA_REG_MASK                      0x1f000000
#define  BGMAC_PA_REG_SHIFT                     24
#define  BGMAC_PA_WRITE                         0x20000000
#define  BGMAC_PA_START                         0x40000000
#define BGMAC_PHY_CNTL                          0x188           /* PHY control address */
#define  BGMAC_PC_EPA_MASK                      0x0000001f
#define  BGMAC_PC_MCT_MASK                      0x007f0000
#define  BGMAC_PC_MCT_SHIFT                     16
#define  BGMAC_PC_MTE                           0x00800000
#define BGMAC_TXQ_CTL                           0x18c
#define  BGMAC_TXQ_CTL_DBT_MASK                 0x00000fff
#define  BGMAC_TXQ_CTL_DBT_SHIFT                0
#define BGMAC_RXQ_CTL                           0x190
#define  BGMAC_RXQ_CTL_DBT_MASK                 0x00000fff
#define  BGMAC_RXQ_CTL_DBT_SHIFT                0
#define  BGMAC_RXQ_CTL_PTE                      0x00001000
#define  BGMAC_RXQ_CTL_MDP_MASK                 0x3f000000
#define  BGMAC_RXQ_CTL_MDP_SHIFT                24
#define BGMAC_GPIO_SELECT                       0x194
#define BGMAC_GPIO_OUTPUT_EN                    0x198
/* For 0x1e0 see BCMA_CLKCTLST */
#define BGMAC_HW_WAR                            0x1e4
#define BGMAC_PWR_CTL                           0x1e8
#define BGMAC_DMA_BASE0                         0x200           /* Tx and Rx controller */
#define BGMAC_DMA_BASE1                         0x240           /* Tx controller only */
#define BGMAC_DMA_BASE2                         0x280           /* Tx controller only */
#define BGMAC_DMA_BASE3                         0x2C0           /* Tx controller only */
#define BGMAC_TX_GOOD_OCTETS                    0x300
#define BGMAC_TX_GOOD_OCTETS_HIGH               0x304
#define BGMAC_TX_GOOD_PKTS                      0x308
#define BGMAC_TX_OCTETS                         0x30c
#define BGMAC_TX_OCTETS_HIGH                    0x310
#define BGMAC_TX_PKTS                           0x314
#define BGMAC_TX_BROADCAST_PKTS                 0x318
#define BGMAC_TX_MULTICAST_PKTS                 0x31c
#define BGMAC_TX_LEN_64                         0x320
#define BGMAC_TX_LEN_65_TO_127                  0x324
#define BGMAC_TX_LEN_128_TO_255                 0x328
#define BGMAC_TX_LEN_256_TO_511                 0x32c
#define BGMAC_TX_LEN_512_TO_1023                0x330
#define BGMAC_TX_LEN_1024_TO_1522               0x334
#define BGMAC_TX_LEN_1523_TO_2047               0x338
#define BGMAC_TX_LEN_2048_TO_4095               0x33c
#define BGMAC_TX_LEN_4095_TO_8191               0x340
#define BGMAC_TX_LEN_8192_TO_MAX                0x344
#define BGMAC_TX_JABBER_PKTS                    0x348           /* Error */
#define BGMAC_TX_OVERSIZE_PKTS                  0x34c           /* Error */
#define BGMAC_TX_FRAGMENT_PKTS                  0x350
#define BGMAC_TX_UNDERRUNS                      0x354           /* Error */
#define BGMAC_TX_TOTAL_COLS                     0x358
#define BGMAC_TX_SINGLE_COLS                    0x35c
#define BGMAC_TX_MULTIPLE_COLS                  0x360
#define BGMAC_TX_EXCESSIVE_COLS                 0x364           /* Error */
#define BGMAC_TX_LATE_COLS                      0x368           /* Error */
#define BGMAC_TX_DEFERED                        0x36c
#define BGMAC_TX_CARRIER_LOST                   0x370
#define BGMAC_TX_PAUSE_PKTS                     0x374
#define BGMAC_TX_UNI_PKTS                       0x378
#define BGMAC_TX_Q0_PKTS                        0x37c
#define BGMAC_TX_Q0_OCTETS                      0x380
#define BGMAC_TX_Q0_OCTETS_HIGH                 0x384
#define BGMAC_TX_Q1_PKTS                        0x388
#define BGMAC_TX_Q1_OCTETS                      0x38c
#define BGMAC_TX_Q1_OCTETS_HIGH                 0x390
#define BGMAC_TX_Q2_PKTS                        0x394
#define BGMAC_TX_Q2_OCTETS                      0x398
#define BGMAC_TX_Q2_OCTETS_HIGH                 0x39c
#define BGMAC_TX_Q3_PKTS                        0x3a0
#define BGMAC_TX_Q3_OCTETS                      0x3a4
#define BGMAC_TX_Q3_OCTETS_HIGH                 0x3a8
#define BGMAC_RX_GOOD_OCTETS                    0x3b0
#define BGMAC_RX_GOOD_OCTETS_HIGH               0x3b4
#define BGMAC_RX_GOOD_PKTS                      0x3b8
#define BGMAC_RX_OCTETS                         0x3bc
#define BGMAC_RX_OCTETS_HIGH                    0x3c0
#define BGMAC_RX_PKTS                           0x3c4
#define BGMAC_RX_BROADCAST_PKTS                 0x3c8
#define BGMAC_RX_MULTICAST_PKTS                 0x3cc
#define BGMAC_RX_LEN_64                         0x3d0
#define BGMAC_RX_LEN_65_TO_127                  0x3d4
#define BGMAC_RX_LEN_128_TO_255                 0x3d8
#define BGMAC_RX_LEN_256_TO_511                 0x3dc
#define BGMAC_RX_LEN_512_TO_1023                0x3e0
#define BGMAC_RX_LEN_1024_TO_1522               0x3e4
#define BGMAC_RX_LEN_1523_TO_2047               0x3e8
#define BGMAC_RX_LEN_2048_TO_4095               0x3ec
#define BGMAC_RX_LEN_4095_TO_8191               0x3f0
#define BGMAC_RX_LEN_8192_TO_MAX                0x3f4
#define BGMAC_RX_JABBER_PKTS                    0x3f8           /* Error */
#define BGMAC_RX_OVERSIZE_PKTS                  0x3fc           /* Error */
#define BGMAC_RX_FRAGMENT_PKTS                  0x400
#define BGMAC_RX_MISSED_PKTS                    0x404           /* Error */
#define BGMAC_RX_CRC_ALIGN_ERRS                 0x408           /* Error */
#define BGMAC_RX_UNDERSIZE                      0x40c           /* Error */
#define BGMAC_RX_CRC_ERRS                       0x410           /* Error */
#define BGMAC_RX_ALIGN_ERRS                     0x414           /* Error */
#define BGMAC_RX_SYMBOL_ERRS                    0x418           /* Error */
#define BGMAC_RX_PAUSE_PKTS                     0x41c
#define BGMAC_RX_NONPAUSE_PKTS                  0x420
#define BGMAC_RX_SACHANGES                      0x424
#define BGMAC_RX_UNI_PKTS                       0x428
#define BGMAC_UNIMAC_VERSION                    0x800
#define BGMAC_HDBKP_CTL                         0x804
#define BGMAC_CMDCFG                            0x808           /* Configuration */
#define  BGMAC_CMDCFG_TE                        0x00000001      /* Set to activate TX */
#define  BGMAC_CMDCFG_RE                        0x00000002      /* Set to activate RX */
#define  BGMAC_CMDCFG_ES_MASK                   0x0000000c      /* Ethernet speed see gmac_speed */
#define   BGMAC_CMDCFG_ES_10                    0x00000000
#define   BGMAC_CMDCFG_ES_100                   0x00000004
#define   BGMAC_CMDCFG_ES_1000                  0x00000008
#define  BGMAC_CMDCFG_PROM                      0x00000010      /* Set to activate promiscuous mode */
#define  BGMAC_CMDCFG_PAD_EN                    0x00000020
#define  BGMAC_CMDCFG_CF                        0x00000040
#define  BGMAC_CMDCFG_PF                        0x00000080
#define  BGMAC_CMDCFG_RPI                       0x00000100      /* Unset to enable 802.3x tx flow control */
#define  BGMAC_CMDCFG_TAI                       0x00000200
#define  BGMAC_CMDCFG_HD                        0x00000400      /* Set if in half duplex mode */
#define  BGMAC_CMDCFG_HD_SHIFT                  10
#define  BGMAC_CMDCFG_SR                        0x00000800      /* Set to reset mode */
#define  BGMAC_CMDCFG_ML                        0x00008000      /* Set to activate mac loopback mode */
#define  BGMAC_CMDCFG_AE                        0x00400000
#define  BGMAC_CMDCFG_CFE                       0x00800000
#define  BGMAC_CMDCFG_NLC                       0x01000000
#define  BGMAC_CMDCFG_RL                        0x02000000
#define  BGMAC_CMDCFG_RED                       0x04000000
#define  BGMAC_CMDCFG_PE                        0x08000000
#define  BGMAC_CMDCFG_TPI                       0x10000000
#define  BGMAC_CMDCFG_AT                        0x20000000
#define BGMAC_MACADDR_HIGH                      0x80c           /* High 4 octets of own mac address */
#define BGMAC_MACADDR_LOW                       0x810           /* Low 2 octets of own mac address */
#define BGMAC_RXMAX_LENGTH                      0x814           /* Max receive frame length with vlan tag */
#define BGMAC_PAUSEQUANTA                       0x818
#define BGMAC_MAC_MODE                          0x844
#define BGMAC_OUTERTAG                          0x848
#define BGMAC_INNERTAG                          0x84c
#define BGMAC_TXIPG                             0x85c
#define BGMAC_PAUSE_CTL                         0xb30
#define BGMAC_TX_FLUSH                          0xb34
#define BGMAC_RX_STATUS                         0xb38
#define BGMAC_TX_STATUS                         0xb3c

#define BGMAC_PHY_CTL                           0x00
#define  BGMAC_PHY_CTL_SPEED_MSB                0x0040
#define  BGMAC_PHY_CTL_DUPLEX                   0x0100          /* duplex mode */
#define  BGMAC_PHY_CTL_RESTART                  0x0200          /* restart autonegotiation */
#define  BGMAC_PHY_CTL_ANENAB                   0x1000          /* enable autonegotiation */
#define  BGMAC_PHY_CTL_SPEED                    0x2000
#define  BGMAC_PHY_CTL_LOOP                     0x4000          /* loopback */
#define  BGMAC_PHY_CTL_RESET                    0x8000          /* reset */
/* Helpers */
#define  BGMAC_PHY_CTL_SPEED_10                 0
#define  BGMAC_PHY_CTL_SPEED_100                BGMAC_PHY_CTL_SPEED
#define  BGMAC_PHY_CTL_SPEED_1000               BGMAC_PHY_CTL_SPEED_MSB
#define BGMAC_PHY_ADV                           0x04
#define  BGMAC_PHY_ADV_10HALF                   0x0020          /* advertise 10MBits/s half duplex */
#define  BGMAC_PHY_ADV_10FULL                   0x0040          /* advertise 10MBits/s full duplex */
#define  BGMAC_PHY_ADV_100HALF                  0x0080          /* advertise 100MBits/s half duplex */
#define  BGMAC_PHY_ADV_100FULL                  0x0100          /* advertise 100MBits/s full duplex */
#define BGMAC_PHY_ADV2                          0x09
#define  BGMAC_PHY_ADV2_1000HALF                0x0100          /* advertise 1000MBits/s half duplex */
#define  BGMAC_PHY_ADV2_1000FULL                0x0200          /* advertise 1000MBits/s full duplex */

/* BCMA GMAC core specific IO Control (BCMA_IOCTL) flags */
#define BGMAC_BCMA_IOCTL_SW_CLKEN               0x00000004      /* PHY Clock Enable */
#define BGMAC_BCMA_IOCTL_SW_RESET               0x00000008      /* PHY Reset */

/* BCMA GMAC core specific IO status (BCMA_IOST) flags */
#define BGMAC_BCMA_IOST_ATTACHED                0x00000800

#define BGMAC_NUM_MIB_TX_REGS   \
                (((BGMAC_TX_Q3_OCTETS_HIGH - BGMAC_TX_GOOD_OCTETS) / 4) + 1)
#define BGMAC_NUM_MIB_RX_REGS   \
                (((BGMAC_RX_UNI_PKTS - BGMAC_RX_GOOD_OCTETS) / 4) + 1)

#define BGMAC_DMA_TX_CTL                        0x00
#define  BGMAC_DMA_TX_ENABLE                    0x00000001
#define  BGMAC_DMA_TX_SUSPEND                   0x00000002
#define  BGMAC_DMA_TX_LOOPBACK                  0x00000004
#define  BGMAC_DMA_TX_FLUSH                     0x00000010
#define  BGMAC_DMA_TX_PARITY_DISABLE            0x00000800
#define  BGMAC_DMA_TX_ADDREXT_MASK              0x00030000
#define  BGMAC_DMA_TX_ADDREXT_SHIFT             16
#define BGMAC_DMA_TX_INDEX                      0x04
#define BGMAC_DMA_TX_RINGLO                     0x08
#define BGMAC_DMA_TX_RINGHI                     0x0C
#define BGMAC_DMA_TX_STATUS                     0x10
#define  BGMAC_DMA_TX_STATDPTR                  0x00001FFF
#define  BGMAC_DMA_TX_STAT                      0xF0000000
#define   BGMAC_DMA_TX_STAT_DISABLED            0x00000000
#define   BGMAC_DMA_TX_STAT_ACTIVE              0x10000000
#define   BGMAC_DMA_TX_STAT_IDLEWAIT            0x20000000
#define   BGMAC_DMA_TX_STAT_STOPPED             0x30000000
#define   BGMAC_DMA_TX_STAT_SUSP                0x40000000
#define BGMAC_DMA_TX_ERROR                      0x14
#define  BGMAC_DMA_TX_ERRDPTR                   0x0001FFFF
#define  BGMAC_DMA_TX_ERR                       0xF0000000
#define   BGMAC_DMA_TX_ERR_NOERR                0x00000000
#define   BGMAC_DMA_TX_ERR_PROT                 0x10000000
#define   BGMAC_DMA_TX_ERR_UNDERRUN             0x20000000
#define   BGMAC_DMA_TX_ERR_TRANSFER             0x30000000
#define   BGMAC_DMA_TX_ERR_DESCREAD             0x40000000
#define   BGMAC_DMA_TX_ERR_CORE                 0x50000000
#define BGMAC_DMA_RX_CTL                        0x20
#define  BGMAC_DMA_RX_ENABLE                    0x00000001
#define  BGMAC_DMA_RX_FRAME_OFFSET_MASK         0x000000FE
#define  BGMAC_DMA_RX_FRAME_OFFSET_SHIFT        1
#define  BGMAC_DMA_RX_DIRECT_FIFO               0x00000100
#define  BGMAC_DMA_RX_OVERFLOW_CONT             0x00000400
#define  BGMAC_DMA_RX_PARITY_DISABLE            0x00000800
#define  BGMAC_DMA_RX_ADDREXT_MASK              0x00030000
#define  BGMAC_DMA_RX_ADDREXT_SHIFT             16
#define BGMAC_DMA_RX_INDEX                      0x24
#define BGMAC_DMA_RX_RINGLO                     0x28
#define BGMAC_DMA_RX_RINGHI                     0x2C
#define BGMAC_DMA_RX_STATUS                     0x30
#define  BGMAC_DMA_RX_STATDPTR                  0x00001FFF
#define  BGMAC_DMA_RX_STAT                      0xF0000000
#define   BGMAC_DMA_RX_STAT_DISABLED            0x00000000
#define   BGMAC_DMA_RX_STAT_ACTIVE              0x10000000
#define   BGMAC_DMA_RX_STAT_IDLEWAIT            0x20000000
#define   BGMAC_DMA_RX_STAT_STOPPED             0x30000000
#define   BGMAC_DMA_RX_STAT_SUSP                0x40000000
#define BGMAC_DMA_RX_ERROR                      0x34
#define  BGMAC_DMA_RX_ERRDPTR                   0x0001FFFF
#define  BGMAC_DMA_RX_ERR                       0xF0000000
#define   BGMAC_DMA_RX_ERR_NOERR                0x00000000
#define   BGMAC_DMA_RX_ERR_PROT                 0x10000000
#define   BGMAC_DMA_RX_ERR_UNDERRUN             0x20000000
#define   BGMAC_DMA_RX_ERR_TRANSFER             0x30000000
#define   BGMAC_DMA_RX_ERR_DESCREAD             0x40000000
#define   BGMAC_DMA_RX_ERR_CORE                 0x50000000

#define BGMAC_DESC_CTL0_EOT                     0x10000000      /* End of ring */
#define BGMAC_DESC_CTL0_IOC                     0x20000000      /* IRQ on complete */
#define BGMAC_DESC_CTL0_SOF                     0x40000000      /* Start of frame */
#define BGMAC_DESC_CTL0_EOF                     0x80000000      /* End of frame */
#define BGMAC_DESC_CTL1_LEN                     0x00001FFF

#define BGMAC_PHY_NOREGS                        0x1E
#define BGMAC_PHY_MASK                          0x1F

#define BGMAC_MAX_TX_RINGS                      4
#define BGMAC_MAX_RX_RINGS                      1

#define BGMAC_TX_RING_SLOTS                     128
#define BGMAC_RX_RING_SLOTS                     512 - 1         /* Why -1? Well, Broadcom does that... */

#define BGMAC_RX_HEADER_LEN                     28              /* Last 24 bytes are unused. Well... */
#define BGMAC_RX_FRAME_OFFSET                   30              /* There are 2 unused bytes between header and real data */
#define BGMAC_RX_MAX_FRAME_SIZE                 1536            /* Copied from b44/tg3 */
#define BGMAC_RX_BUF_SIZE                       (BGMAC_RX_FRAME_OFFSET + BGMAC_RX_MAX_FRAME_SIZE)

#define BGMAC_BFL_ENETROBO                      0x0010          /* has ephy roboswitch spi */
#define BGMAC_BFL_ENETADM                       0x0080          /* has ADMtek switch */
#define BGMAC_BFL_ENETVLAN                      0x0100          /* can do vlan */

#define BGMAC_CHIPCTL_1_IF_TYPE_MASK            0x00000030
#define BGMAC_CHIPCTL_1_IF_TYPE_RMII            0x00000000
#define BGMAC_CHIPCTL_1_IF_TYPE_MI              0x00000010
#define BGMAC_CHIPCTL_1_IF_TYPE_RGMII           0x00000020
#define BGMAC_CHIPCTL_1_SW_TYPE_MASK            0x000000C0
#define BGMAC_CHIPCTL_1_SW_TYPE_EPHY            0x00000000
#define BGMAC_CHIPCTL_1_SW_TYPE_EPHYMII         0x00000040
#define BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII        0x00000080
#define BGMAC_CHIPCTL_1_SW_TYPE_RGMII           0x000000C0
#define BGMAC_CHIPCTL_1_RXC_DLL_BYPASS          0x00010000

#define BGMAC_SPEED_10                          0x0001
#define BGMAC_SPEED_100                         0x0002
#define BGMAC_SPEED_1000                        0x0004

#define BGMAC_WEIGHT    64

#define ETHER_MAX_LEN   1518

struct bgmac_slot_info {
        struct sk_buff *skb;
        dma_addr_t dma_addr;
};

struct bgmac_dma_desc {
        __le32 ctl0;
        __le32 ctl1;
        __le32 addr_low;
        __le32 addr_high;
} __packed;

enum bgmac_dma_ring_type {
        BGMAC_DMA_RING_TX,
        BGMAC_DMA_RING_RX,
};

/**
 * bgmac_dma_ring - contains info about DMA ring (either TX or RX one)
 * @start: index of the first slot containing data
 * @end: index of a slot that can *not* be read (yet)
 *
 * Be really aware of the specific @end meaning. It's an index of a slot *after*
 * the one containing data that can be read. If @start equals @end the ring is
 * empty.
 */
struct bgmac_dma_ring {
        u16 num_slots;
        u16 start;
        u16 end;

        u16 mmio_base;
        struct bgmac_dma_desc *cpu_base;
        dma_addr_t dma_base;

        struct bgmac_slot_info slots[BGMAC_RX_RING_SLOTS];
};

struct bgmac_rx_header {
        __le16 len;
        __le16 flags;
        __le16 pad[12];
};

struct bgmac {
        struct bcma_device *core;
        struct bcma_device *cmn; /* Reference to CMN core for BCM4706 */
        struct net_device *net_dev;
        struct napi_struct napi;
        struct mii_bus *mii_bus;

        /* DMA */
        struct bgmac_dma_ring tx_ring[BGMAC_MAX_TX_RINGS];
        struct bgmac_dma_ring rx_ring[BGMAC_MAX_RX_RINGS];

        /* Stats */
        bool stats_grabbed;
        u32 mib_tx_regs[BGMAC_NUM_MIB_TX_REGS];
        u32 mib_rx_regs[BGMAC_NUM_MIB_RX_REGS];

        /* Int */
        u32 int_mask;
        u32 int_status;

        /* Speed-related */
        int speed;
        bool autoneg;
        bool full_duplex;

        u8 phyaddr;
        bool has_robosw;

        bool loopback;
};

static inline u32 bgmac_read(struct bgmac *bgmac, u16 offset)
{
        return bcma_read32(bgmac->core, offset);
}

static inline void bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
{
        bcma_write32(bgmac->core, offset, value);
}

static inline void bgmac_maskset(struct bgmac *bgmac, u16 offset, u32 mask,
                                   u32 set)
{
        bgmac_write(bgmac, offset, (bgmac_read(bgmac, offset) & mask) | set);
}

static inline void bgmac_mask(struct bgmac *bgmac, u16 offset, u32 mask)
{
        bgmac_maskset(bgmac, offset, mask, 0);
}

static inline void bgmac_set(struct bgmac *bgmac, u16 offset, u32 set)
{
        bgmac_maskset(bgmac, offset, ~0, set);
}

#endif /* _BGMAC_H */