/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 1997, 1998, 1999
 *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Sundance PCI device/vendor ID for the
 * ST201 chip.
 */
#define ST_VENDORID             0x13F0
#define ST_DEVICEID_ST201_1     0x0200
#define ST_DEVICEID_ST201_2     0x0201

/*
 * D-Link PCI device/vendor ID for the DL10050[AB] chip
 */
#define DL_VENDORID             0x1186
#define DL_DEVICEID_DL10050     0x1002

/*
 * Register definitions for the Sundance Technologies ST201 PCI
 * fast ethernet controller. The register space is 128 bytes long and
 * can be accessed using either PCI I/O space or PCI memory mapping.
 * There are 32-bit, 16-bit and 8-bit registers.
 */

#define STE_DMACTL              0x00
#define STE_TX_DMALIST_PTR      0x04
#define STE_TX_DMABURST_THRESH  0x08
#define STE_TX_DMAURG_THRESH    0x09
#define STE_TX_DMAPOLL_PERIOD   0x0A
#define STE_RX_DMASTATUS        0x0C
#define STE_RX_DMALIST_PTR      0x10
#define STE_RX_DMABURST_THRESH  0x14
#define STE_RX_DMAURG_THRESH    0x15
#define STE_RX_DMAPOLL_PERIOD   0x16
#define STE_COUNTDOWN           0x18
#define STE_DEBUGCTL            0x1A
#define STE_ASICCTL             0x30
#define STE_EEPROM_DATA         0x34
#define STE_EEPROM_CTL          0x36
#define STE_FIFOCTL             0x3A
#define STE_TX_STARTTHRESH      0x3C
#define STE_RX_EARLYTHRESH      0x3E
#define STE_EXT_ROMADDR         0x40
#define STE_EXT_ROMDATA         0x44
#define STE_WAKE_EVENT          0x45
#define STE_TX_STATUS           0x46
#define STE_TX_FRAMEID          0x47
#define STE_ISR_ACK             0x4A
#define STE_IMR                 0x4C
#define STE_ISR                 0x4E
#define STE_MACCTL0             0x50
#define STE_MACCTL1             0x52
#define STE_PAR0                0x54
#define STE_PAR1                0x56
#define STE_PAR2                0x58
#define STE_MAX_FRAMELEN        0x5A
#define STE_RX_MODE             0x5C
#define STE_TX_RECLAIM_THRESH   0x5D
#define STE_PHYCTL              0x5E
#define STE_MAR0                0x60
#define STE_MAR1                0x62
#define STE_MAR2                0x64
#define STE_MAR3                0x66

#define STE_STAT_RX_OCTETS_LO   0x68
#define STE_STAT_RX_OCTETS_HI   0x6A
#define STE_STAT_TX_OCTETS_LO   0x6C
#define STE_STAT_TX_OCTETS_HI   0x6E
#define STE_STAT_TX_FRAMES      0x70
#define STE_STAT_RX_FRAMES      0x72
#define STE_STAT_CARRIER_ERR    0x74
#define STE_STAT_LATE_COLLS     0x75
#define STE_STAT_MULTI_COLLS    0x76
#define STE_STAT_SINGLE_COLLS   0x77
#define STE_STAT_TX_DEFER       0x78
#define STE_STAT_RX_LOST        0x79
#define STE_STAT_TX_EXDEFER     0x7A
#define STE_STAT_TX_ABORT       0x7B
#define STE_STAT_TX_BCAST       0x7C
#define STE_STAT_RX_BCAST       0x7D
#define STE_STAT_TX_MCAST       0x7E
#define STE_STAT_RX_MCAST       0x7F

#define STE_DMACTL_RXDMA_STOPPED        0x00000001
#define STE_DMACTL_TXDMA_CMPREQ         0x00000002
#define STE_DMACTL_TXDMA_STOPPED        0x00000004
#define STE_DMACTL_RXDMA_COMPLETE       0x00000008
#define STE_DMACTL_TXDMA_COMPLETE       0x00000010
#define STE_DMACTL_RXDMA_STALL          0x00000100
#define STE_DMACTL_RXDMA_UNSTALL        0x00000200
#define STE_DMACTL_TXDMA_STALL          0x00000400
#define STE_DMACTL_TXDMA_UNSTALL        0x00000800
#define STE_DMACTL_TXDMA_INPROG         0x00004000
#define STE_DMACTL_DMA_HALTINPROG       0x00008000
#define STE_DMACTL_RXEARLY_ENABLE       0x00020000
#define STE_DMACTL_COUNTDOWN_SPEED      0x00040000
#define STE_DMACTL_COUNTDOWN_MODE       0x00080000
#define STE_DMACTL_MWI_DISABLE          0x00100000
#define STE_DMACTL_RX_DISCARD_OFLOWS    0x00400000
#define STE_DMACTL_COUNTDOWN_ENABLE     0x00800000
#define STE_DMACTL_TARGET_ABORT         0x40000000
#define STE_DMACTL_MASTER_ABORT         0x80000000

/*
 * TX DMA burst thresh is the number of 32-byte blocks that
 * must be loaded into the TX Fifo before a TXDMA burst request
 * will be issued.
 */
#define STE_TXDMABURST_THRESH           0x1F

/*
 * The number of 32-byte blocks in the TX FIFO falls below the
 * TX DMA urgent threshold, a TX DMA urgent request will be
 * generated.
 */
#define STE_TXDMAURG_THRESH             0x3F

/*
 * Number of 320ns intervals between polls of the TXDMA next
 * descriptor pointer (if we're using polling mode).
 */
#define STE_TXDMA_POLL_PERIOD           0x7F

#define STE_RX_DMASTATUS_FRAMELEN       0x00001FFF
#define STE_RX_DMASTATUS_RXERR          0x00004000
#define STE_RX_DMASTATUS_DMADONE        0x00008000
#define STE_RX_DMASTATUS_FIFO_OFLOW     0x00010000
#define STE_RX_DMASTATUS_RUNT           0x00020000
#define STE_RX_DMASTATUS_ALIGNERR       0x00040000
#define STE_RX_DMASTATUS_CRCERR         0x00080000
#define STE_RX_DMASTATUS_GIANT          0x00100000
#define STE_RX_DMASTATUS_DRIBBLE        0x00800000
#define STE_RX_DMASTATUS_DMA_OFLOW      0x01000000

/*
 * RX DMA burst thresh is the number of 32-byte blocks that
 * must be present in the RX FIFO before a RXDMA bus master
 * request will be issued.
 */
#define STE_RXDMABURST_THRESH           0xFF

/*
 * The number of 32-byte blocks in the RX FIFO falls below the
 * RX DMA urgent threshold, a RX DMA urgent request will be
 * generated.
 */
#define STE_RXDMAURG_THRESH             0x1F

/*
 * Number of 320ns intervals between polls of the RXDMA complete
 * bit in the status field on the current RX descriptor (if we're
 * using polling mode).
 */
#define STE_RXDMA_POLL_PERIOD           0x7F

#define STE_DEBUGCTL_GPIO0_CTL          0x0001
#define STE_DEBUGCTL_GPIO1_CTL          0x0002
#define STE_DEBUGCTL_GPIO0_DATA         0x0004
#define STE_DEBUGCTL_GPIO1_DATA         0x0008

#define STE_ASICCTL_ROMSIZE             0x00000002
#define STE_ASICCTL_TX_LARGEPKTS        0x00000004
#define STE_ASICCTL_RX_LARGEPKTS        0x00000008
#define STE_ASICCTL_EXTROM_DISABLE      0x00000010
#define STE_ASICCTL_PHYSPEED_10         0x00000020
#define STE_ASICCTL_PHYSPEED_100        0x00000040
#define STE_ASICCTL_PHYMEDIA            0x00000080
#define STE_ASICCTL_FORCEDCONFIG        0x00000700
#define STE_ASICCTL_D3RESET_DISABLE     0x00000800
#define STE_ASICCTL_SPEEDUPMODE         0x00002000
#define STE_ASICCTL_LEDMODE             0x00004000
#define STE_ASICCTL_RSTOUT_POLARITY     0x00008000
#define STE_ASICCTL_GLOBAL_RESET        0x00010000
#define STE_ASICCTL_RX_RESET            0x00020000
#define STE_ASICCTL_TX_RESET            0x00040000
#define STE_ASICCTL_DMA_RESET           0x00080000
#define STE_ASICCTL_FIFO_RESET          0x00100000
#define STE_ASICCTL_NETWORK_RESET       0x00200000
#define STE_ASICCTL_HOST_RESET          0x00400000
#define STE_ASICCTL_AUTOINIT_RESET      0x00800000
#define STE_ASICCTL_EXTRESET_RESET      0x01000000
#define STE_ASICCTL_SOFTINTR            0x02000000
#define STE_ASICCTL_RESET_BUSY          0x04000000

#define STE_EECTL_ADDR                  0x00FF
#define STE_EECTL_OPCODE                0x0300
#define STE_EECTL_BUSY                  0x1000

#define STE_EEOPCODE_WRITE              0x0100
#define STE_EEOPCODE_READ               0x0200
#define STE_EEOPCODE_ERASE              0x0300

#define STE_FIFOCTL_RAMTESTMODE         0x0001
#define STE_FIFOCTL_OVERRUNMODE         0x0200
#define STE_FIFOCTL_RXFIFOFULL          0x0800
#define STE_FIFOCTL_TX_BUSY             0x4000
#define STE_FIFOCTL_RX_BUSY             0x8000

/*
 * The number of bytes that must in present in the TX FIFO before
 * transmission begins. Value should be in increments of 4 bytes.
 */
#define STE_TXSTART_THRESH              0x1FFC

/*
 * Number of bytes that must be present in the RX FIFO before
 * an RX EARLY interrupt is generated.
 */
#define STE_RXEARLY_THRESH              0x1FFC

#define STE_WAKEEVENT_WAKEPKT_ENB       0x01
#define STE_WAKEEVENT_MAGICPKT_ENB      0x02
#define STE_WAKEEVENT_LINKEVT_ENB       0x04
#define STE_WAKEEVENT_WAKEPOLARITY      0x08
#define STE_WAKEEVENT_WAKEPKTEVENT      0x10
#define STE_WAKEEVENT_MAGICPKTEVENT     0x20
#define STE_WAKEEVENT_LINKEVENT         0x40
#define STE_WAKEEVENT_WAKEONLAN_ENB     0x80

#define STE_TXSTATUS_RECLAIMERR         0x02
#define STE_TXSTATUS_STATSOFLOW         0x04
#define STE_TXSTATUS_EXCESSCOLLS        0x08
#define STE_TXSTATUS_UNDERRUN           0x10
#define STE_TXSTATUS_TXINTR_REQ         0x40
#define STE_TXSTATUS_TXDONE             0x80

#define STE_ERR_BITS                    "\20"                           \
                                        "\2RECLAIM\3STSOFLOW"           \
                                        "\4EXCESSCOLLS\5UNDERRUN"       \
                                        "\6INTREQ\7DONE"

#define STE_ISRACK_INTLATCH             0x0001
#define STE_ISRACK_HOSTERR              0x0002
#define STE_ISRACK_TX_DONE              0x0004
#define STE_ISRACK_MACCTL_FRAME         0x0008
#define STE_ISRACK_RX_DONE              0x0010
#define STE_ISRACK_RX_EARLY             0x0020
#define STE_ISRACK_SOFTINTR             0x0040
#define STE_ISRACK_STATS_OFLOW          0x0080
#define STE_ISRACK_LINKEVENT            0x0100
#define STE_ISRACK_TX_DMADONE           0x0200
#define STE_ISRACK_RX_DMADONE           0x0400

#define STE_IMR_HOSTERR                 0x0002
#define STE_IMR_TX_DONE                 0x0004
#define STE_IMR_MACCTL_FRAME            0x0008
#define STE_IMR_RX_DONE                 0x0010
#define STE_IMR_RX_EARLY                0x0020
#define STE_IMR_SOFTINTR                0x0040
#define STE_IMR_STATS_OFLOW             0x0080
#define STE_IMR_LINKEVENT               0x0100
#define STE_IMR_TX_DMADONE              0x0200
#define STE_IMR_RX_DMADONE              0x0400

#define STE_INTRS                               \
        (STE_IMR_RX_DMADONE|STE_IMR_TX_DMADONE| \
        STE_IMR_TX_DONE|STE_IMR_SOFTINTR|       \
        STE_IMR_HOSTERR)

#define STE_ISR_INTLATCH                0x0001
#define STE_ISR_HOSTERR                 0x0002
#define STE_ISR_TX_DONE                 0x0004
#define STE_ISR_MACCTL_FRAME            0x0008
#define STE_ISR_RX_DONE                 0x0010
#define STE_ISR_RX_EARLY                0x0020
#define STE_ISR_SOFTINTR                0x0040
#define STE_ISR_STATS_OFLOW             0x0080
#define STE_ISR_LINKEVENT               0x0100
#define STE_ISR_TX_DMADONE              0x0200
#define STE_ISR_RX_DMADONE              0x0400

/*
 * Note: the Sundance manual gives the impression that the's
 * only one 32-bit MACCTL register. In fact, there are two
 * 16-bit registers side by side, and you have to access them
 * separately.
 */
#define STE_MACCTL0_IPG                 0x0003
#define STE_MACCTL0_FULLDUPLEX          0x0020
#define STE_MACCTL0_RX_GIANTS           0x0040
#define STE_MACCTL0_FLOWCTL_ENABLE      0x0100
#define STE_MACCTL0_RX_FCS              0x0200
#define STE_MACCTL0_FIFOLOOPBK          0x0400
#define STE_MACCTL0_MACLOOPBK           0x0800

#define STE_MACCTL1_COLLDETECT          0x0001
#define STE_MACCTL1_CARRSENSE           0x0002
#define STE_MACCTL1_TX_BUSY             0x0004
#define STE_MACCTL1_TX_ERROR            0x0008
#define STE_MACCTL1_STATS_ENABLE        0x0020
#define STE_MACCTL1_STATS_DISABLE       0x0040
#define STE_MACCTL1_STATS_ENABLED       0x0080
#define STE_MACCTL1_TX_ENABLE           0x0100
#define STE_MACCTL1_TX_DISABLE          0x0200
#define STE_MACCTL1_TX_ENABLED          0x0400
#define STE_MACCTL1_RX_ENABLE           0x0800
#define STE_MACCTL1_RX_DISABLE          0x1000
#define STE_MACCTL1_RX_ENABLED          0x2000
#define STE_MACCTL1_PAUSED              0x4000

#define STE_IPG_96BT                    0x00000000
#define STE_IPG_128BT                   0x00000001
#define STE_IPG_224BT                   0x00000002
#define STE_IPG_544BT                   0x00000003

#define STE_RXMODE_UNICAST              0x01
#define STE_RXMODE_ALLMULTI             0x02
#define STE_RXMODE_BROADCAST            0x04
#define STE_RXMODE_PROMISC              0x08
#define STE_RXMODE_MULTIHASH            0x10
#define STE_RXMODE_ALLIPMULTI           0x20

#define STE_PHYCTL_MCLK                 0x01
#define STE_PHYCTL_MDATA                0x02
#define STE_PHYCTL_MDIR                 0x04
#define STE_PHYCTL_CLK25_DISABLE        0x08
#define STE_PHYCTL_DUPLEXPOLARITY       0x10
#define STE_PHYCTL_DUPLEXSTAT           0x20
#define STE_PHYCTL_SPEEDSTAT            0x40
#define STE_PHYCTL_LINKSTAT             0x80

#define STE_TIMER_TICKS                 32
#define STE_TIMER_USECS(x)              ((x * 10) / STE_TIMER_TICKS)

#define STE_IM_RX_TIMER_MIN             0
#define STE_IM_RX_TIMER_MAX             209712
#define STE_IM_RX_TIMER_DEFAULT         150

/*
 * EEPROM offsets.
 */
#define STE_EEADDR_CONFIGPARM           0x00
#define STE_EEADDR_ASICCTL              0x02
#define STE_EEADDR_SUBSYS_ID            0x04
#define STE_EEADDR_SUBVEN_ID            0x08

#define STE_EEADDR_NODE0                0x10
#define STE_EEADDR_NODE1                0x12
#define STE_EEADDR_NODE2                0x14

/* PCI registers */
#define STE_PCI_VENDOR_ID               0x00
#define STE_PCI_DEVICE_ID               0x02
#define STE_PCI_COMMAND                 0x04
#define STE_PCI_STATUS                  0x06
#define STE_PCI_CLASSCODE               0x09
#define STE_PCI_LATENCY_TIMER           0x0D
#define STE_PCI_HEADER_TYPE             0x0E
#define STE_PCI_LOIO                    0x10
#define STE_PCI_LOMEM                   0x14
#define STE_PCI_BIOSROM                 0x30
#define STE_PCI_INTLINE                 0x3C
#define STE_PCI_INTPIN                  0x3D
#define STE_PCI_MINGNT                  0x3E
#define STE_PCI_MINLAT                  0x0F

#define STE_PCI_CAPID                   0x50 /* 8 bits */
#define STE_PCI_NEXTPTR                 0x51 /* 8 bits */
#define STE_PCI_PWRMGMTCAP              0x52 /* 16 bits */
#define STE_PCI_PWRMGMTCTRL             0x54 /* 16 bits */

#define STE_PSTATE_MASK                 0x0003
#define STE_PSTATE_D0                   0x0000
#define STE_PSTATE_D1                   0x0002
#define STE_PSTATE_D2                   0x0002
#define STE_PSTATE_D3                   0x0003
#define STE_PME_EN                      0x0010
#define STE_PME_STATUS                  0x8000

struct ste_hw_stats {
        uint64_t                rx_bytes;
        uint32_t                rx_frames;
        uint32_t                rx_bcast_frames;
        uint32_t                rx_mcast_frames;
        uint32_t                rx_lost_frames;
        uint64_t                tx_bytes;
        uint32_t                tx_frames;
        uint32_t                tx_bcast_frames;
        uint32_t                tx_mcast_frames;
        uint32_t                tx_carrsense_errs;
        uint32_t                tx_single_colls;
        uint32_t                tx_multi_colls;
        uint32_t                tx_late_colls;
        uint32_t                tx_frames_defered;
        uint32_t                tx_excess_defers;
        uint32_t                tx_abort;
};

struct ste_frag {
        uint32_t                ste_addr;
        uint32_t                ste_len;
};

#define STE_FRAG_LAST           0x80000000
#define STE_FRAG_LEN            0x00001FFF

/*
 * A TFD is 16 to 512 bytes in length which means it can have up to 126
 * fragments for a single Tx frame. Since most frames used in stack have
 * 3-4 fragments supporting 8 fragments would be enough for normal
 * operation. If we encounter more than 8 fragments we'll collapse them
 * into a frame that has less than or equal to 8 fragments. Each buffer
 * address of a fragment has no alignment limitation.
 */
#define STE_MAXFRAGS    8

struct ste_desc {
        uint32_t                ste_next;
        uint32_t                ste_ctl;
        struct ste_frag         ste_frags[STE_MAXFRAGS];
};

/*
 * A RFD has the same structure of TFD which in turn means hardware
 * supports scatter operation in Rx buffer. Since we just allocate Rx
 * buffer with m_getcl(9) there is no fragmentation at all so use
 * single fragment for RFD.
 */
struct ste_desc_onefrag {
        uint32_t                ste_next;
        uint32_t                ste_status;
        struct ste_frag         ste_frag;
};

#define STE_TXCTL_WORDALIGN     0x00000003
#define STE_TXCTL_ALIGN_DIS     0x00000001
#define STE_TXCTL_FRAMEID       0x000003FC
#define STE_TXCTL_NOCRC         0x00002000
#define STE_TXCTL_TXINTR        0x00008000
#define STE_TXCTL_DMADONE       0x00010000
#define STE_TXCTL_DMAINTR       0x80000000

#define STE_RXSTAT_FRAMELEN     0x00001FFF
#define STE_RXSTAT_FRAME_ERR    0x00004000
#define STE_RXSTAT_DMADONE      0x00008000
#define STE_RXSTAT_FIFO_OFLOW   0x00010000
#define STE_RXSTAT_RUNT         0x00020000
#define STE_RXSTAT_ALIGNERR     0x00040000
#define STE_RXSTAT_CRCERR       0x00080000
#define STE_RXSTAT_GIANT        0x00100000
#define STE_RXSTAT_DRIBBLEBITS  0x00800000
#define STE_RXSTAT_DMA_OFLOW    0x01000000
#define STE_RXATAT_ONEBUF       0x10000000

#define STE_RX_BYTES(x)         ((x) & STE_RXSTAT_FRAMELEN)

/*
 * register space access macros
 */
#define CSR_WRITE_4(sc, reg, val)       \
        bus_write_4((sc)->ste_res, reg, val)
#define CSR_WRITE_2(sc, reg, val)       \
        bus_write_2((sc)->ste_res, reg, val)
#define CSR_WRITE_1(sc, reg, val)       \
        bus_write_1((sc)->ste_res, reg, val)

#define CSR_READ_4(sc, reg)             \
        bus_read_4((sc)->ste_res, reg)
#define CSR_READ_2(sc, reg)             \
        bus_read_2((sc)->ste_res, reg)
#define CSR_READ_1(sc, reg)             \
        bus_read_1((sc)->ste_res, reg)

#define CSR_BARRIER(sc, reg, length, flags)                             \
        bus_barrier((sc)->ste_res, reg, length, flags)

#define STE_DESC_ALIGN          8
#define STE_RX_LIST_CNT         128
#define STE_TX_LIST_CNT         128
#define STE_RX_LIST_SZ          \
        (sizeof(struct ste_desc_onefrag) * STE_RX_LIST_CNT)
#define STE_TX_LIST_SZ          \
        (sizeof(struct ste_desc) * STE_TX_LIST_CNT)
#define STE_ADDR_LO(x)          ((uint64_t)(x) & 0xFFFFFFFF)
#define STE_ADDR_HI(x)          ((uint64_t)(x) >> 32)

/*
 * Since Tx status can hold up to 31 status bytes we should
 * check Tx status before controller fills it up. Otherwise
 * Tx MAC stalls.
 */
#define STE_TX_INTR_FRAMES      16
#define STE_TX_TIMEOUT          5
#define STE_TIMEOUT             1000
#define STE_MIN_FRAMELEN        60
#define STE_PACKET_SIZE         1536
#define STE_INC(x, y)           (x) = (x + 1) % y
#define STE_DEC(x, y)           (x) = ((x) + ((y) - 1)) % (y)
#define STE_NEXT(x, y)          (x + 1) % y

struct ste_type {
        uint16_t                ste_vid;
        uint16_t                ste_did;
        const char              *ste_name;
};

struct ste_list_data {
        struct ste_desc_onefrag *ste_rx_list;
        bus_addr_t              ste_rx_list_paddr;
        struct ste_desc         *ste_tx_list;
        bus_addr_t              ste_tx_list_paddr;
};

struct ste_chain {
        struct ste_desc         *ste_ptr;
        struct mbuf             *ste_mbuf;
        struct ste_chain        *ste_next;
        uint32_t                ste_phys;
        bus_dmamap_t            ste_map;
};

struct ste_chain_onefrag {
        struct ste_desc_onefrag *ste_ptr;
        struct mbuf             *ste_mbuf;
        struct ste_chain_onefrag        *ste_next;
        bus_dmamap_t            ste_map;
};

struct ste_chain_data {
        bus_dma_tag_t           ste_parent_tag;
        bus_dma_tag_t           ste_rx_tag;
        bus_dma_tag_t           ste_tx_tag;
        bus_dma_tag_t           ste_rx_list_tag;
        bus_dmamap_t            ste_rx_list_map;
        bus_dma_tag_t           ste_tx_list_tag;
        bus_dmamap_t            ste_tx_list_map;
        bus_dmamap_t            ste_rx_sparemap;
        struct ste_chain_onefrag ste_rx_chain[STE_RX_LIST_CNT];
        struct ste_chain        ste_tx_chain[STE_TX_LIST_CNT];
        struct ste_chain_onefrag *ste_rx_head;
        struct ste_chain        *ste_last_tx;
        int                     ste_tx_prod;
        int                     ste_tx_cons;
        int                     ste_tx_cnt;
};

struct ste_softc {
        if_t                    ste_ifp;
        struct resource         *ste_res;
        int                     ste_res_id;
        int                     ste_res_type;
        struct resource         *ste_irq;
        void                    *ste_intrhand;
        struct ste_type         *ste_info;
        device_t                ste_miibus;
        device_t                ste_dev;
        int                     ste_tx_thresh;
        int                     ste_flags;
#define STE_FLAG_ONE_PHY        0x0001
#define STE_FLAG_LINK           0x8000
        int                     ste_if_flags;
        int                     ste_timer;
        int                     ste_int_rx_act;
        int                     ste_int_rx_mod;
        struct ste_list_data    ste_ldata;
        struct ste_chain_data   ste_cdata;
        struct callout          ste_callout;
        struct ste_hw_stats     ste_stats;
        struct mtx              ste_mtx;
};

#define STE_LOCK(_sc)           mtx_lock(&(_sc)->ste_mtx)
#define STE_UNLOCK(_sc)         mtx_unlock(&(_sc)->ste_mtx)
#define STE_LOCK_ASSERT(_sc)    mtx_assert(&(_sc)->ste_mtx, MA_OWNED)