FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/i82586.h

     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (c) 1992, University of Vermont and State Agricultural College.
      * Copyright (c) 1992, Garrett A. Wollman.
      * 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 the University of
     *      Vermont and State Agricultural College and Garrett A. Wollman.
     * 4. Neither the name of the University nor the name of the author
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE UNIVERSITY OR AUTHOR 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.
     *
     * $FreeBSD: releng/12.0/sys/dev/ic/i82586.h 325966 2017-11-18 14:26:50Z pfg $
     */
    
    /*
     * Intel 82586 Ethernet chip
     * Register, bit, and structure definitions.
     *
     * Written by GAW with reference to the Clarkson Packet Driver code for this
     * chip written by Russ Nelson and others.
     */
    
    struct ie_en_addr {
            u_char data[6];
    };
    
    /*
     * This is the master configuration block.  It tells the hardware where all
     * the rest of the stuff is.
     */
    struct ie_sys_conf_ptr {
            u_short mbz;                    /* must be zero */
            u_char ie_bus_use;              /* true if 8-bit only */
            u_char mbz2[5];                 /* must be zero */
            caddr_t ie_iscp_ptr;            /* 24-bit physaddr of ISCP */
    };
    
    /*
     * Note that this is wired in hardware; the SCP is always located here, no
     * matter what.
     */
    #define IE_SCP_ADDR 0xfffff4
    
    /*
     * The tells the hardware where all the rest of the stuff is, too.
     * FIXME: some of these should be re-commented after we figure out their
     * REAL function.
     */
    struct ie_int_sys_conf_ptr {
            u_char ie_busy;                 /* zeroed after init */
            u_char mbz;
            u_short ie_scb_offset;          /* 16-bit physaddr of next struct */
            caddr_t ie_base;                /* 24-bit physaddr for all 16-bit vars */
    };
    
    /*
     * This FINALLY tells the hardware what to do and where to put it.
     */
    struct ie_sys_ctl_block {
            u_short ie_status;              /* status word */
            u_short ie_command;             /* command word */
            u_short ie_command_list;        /* 16-pointer to command block list */
            u_short ie_recv_list;           /* 16-pointer to receive frame list */
            u_short ie_err_crc;             /* CRC errors */
            u_short ie_err_align;           /* Alignment errors */
            u_short ie_err_resource;        /* Resource errors */
            u_short ie_err_overrun;         /* Overrun errors */
    };
    
    /* Command values */
    #define IE_RU_COMMAND   0x0070  /* mask for RU command */
    #define IE_RU_NOP       0       /* for completeness */
    #define IE_RU_START     0x0010  /* start receive unit command */
    #define IE_RU_ENABLE    0x0020  /* enable receiver command */
    #define IE_RU_DISABLE   0x0030  /* disable receiver command */
   #define IE_RU_ABORT     0x0040  /* abort current receive operation */
   
   #define IE_CU_COMMAND   0x0700  /* mask for CU command */
   #define IE_CU_NOP       0       /* included for completeness */
   #define IE_CU_START     0x0100  /* do-command command */
   #define IE_CU_RESUME    0x0200  /* resume a suspended cmd list */
   #define IE_CU_STOP      0x0300  /* SUSPEND was already taken */
   #define IE_CU_ABORT     0x0400  /* abort current command */
   
   #define IE_ACK_COMMAND  0xf000  /* mask for ACK command */
   #define IE_ACK_CX       0x8000  /* ack IE_ST_DONE */
   #define IE_ACK_FR       0x4000  /* ack IE_ST_RECV */
   #define IE_ACK_CNA      0x2000  /* ack IE_ST_ALLDONE */
   #define IE_ACK_RNR      0x1000  /* ack IE_ST_RNR */
   
   #define IE_ACTION_COMMAND(x) (((x) & IE_CU_COMMAND) == IE_CU_START)
                                   /* is this command an action command? */
   
   /* Status values */
   #define IE_ST_WHENCE    0xf000  /* mask for cause of interrupt */
   #define IE_ST_DONE      0x8000  /* command with I bit completed */
   #define IE_ST_RECV      0x4000  /* frame received */
   #define IE_ST_ALLDONE   0x2000  /* all commands completed */
   #define IE_ST_RNR       0x1000  /* receive not ready */
   
   #define IE_CU_STATUS    0x700   /* mask for command unit status */
   #define IE_CU_ACTIVE    0x200   /* command unit is active */
   #define IE_CU_SUSPEND   0x100   /* command unit is suspended */
   
   #define IE_RU_STATUS    0x70    /* mask for receiver unit status */
   #define IE_RU_SUSPEND   0x10    /* receiver is suspended */
   #define IE_RU_NOSPACE   0x20    /* receiver has no resources */
   #define IE_RU_READY     0x40    /* reveiver is ready */
   
   /*
    * This is filled in partially by the chip, partially by us.
    */
   struct ie_recv_frame_desc {
           u_short ie_fd_status;           /* status for this frame */
           u_short ie_fd_last;             /* end of frame list flag */
           u_short ie_fd_next;             /* 16-pointer to next RFD */
           u_short ie_fd_buf_desc;         /* 16-pointer to list of buffer desc's */
           struct ie_en_addr dest;         /* destination ether */
           struct ie_en_addr src;          /* source ether */
           u_short ie_length;              /* 802 length/Ether type */
           u_short mbz;                    /* must be zero */
   };
   
   #define IE_FD_LAST      0x8000  /* last rfd in list */
   #define IE_FD_SUSP      0x4000  /* suspend RU after receipt */
   
   #define IE_FD_COMPLETE  0x8000  /* frame is complete */
   #define IE_FD_BUSY      0x4000  /* frame is busy */
   #define IE_FD_OK        0x2000  /* frame is bad */
   #define IE_FD_RNR       0x0200  /* receiver out of resources here */
   
   /*
    * linked list of buffers...
    */
   struct ie_recv_buf_desc {
           u_short ie_rbd_actual;          /* status for this buffer */
           u_short ie_rbd_next;            /* 16-pointer to next RBD */
           caddr_t ie_rbd_buffer;          /* 24-pointer to buffer for this RBD */
           u_short ie_rbd_length;          /* length of the buffer */
           u_short mbz;                    /* must be zero */
   };
   
   #define IE_RBD_LAST     0x8000  /* last buffer */
   #define IE_RBD_USED     0x4000  /* this buffer has data */
   /*
    * All commands share this in common.
    */
   struct ie_cmd_common {
           u_short ie_cmd_status;          /* status of this command */
           u_short ie_cmd_cmd;             /* command word */
           u_short ie_cmd_link;            /* link to next command */
   };
   
   #define IE_STAT_COMPL   0x8000  /* command is completed */
   #define IE_STAT_BUSY    0x4000  /* command is running now */
   #define IE_STAT_OK      0x2000  /* command completed successfully */
   
   #define IE_CMD_NOP      0x0000  /* NOP */
   #define IE_CMD_IASETUP  0x0001  /* initial address setup */
   #define IE_CMD_CONFIG   0x0002  /* configure command */
   #define IE_CMD_MCAST    0x0003  /* multicast setup command */
   #define IE_CMD_XMIT     0x0004  /* transmit command */
   #define IE_CMD_TDR      0x0005  /* time-domain reflectometer command */
   #define IE_CMD_DUMP     0x0006  /* dump command */
   #define IE_CMD_DIAGNOSE 0x0007  /* diagnostics command */
   
   #define IE_CMD_LAST     0x8000  /* this is the last command in the list */
   #define IE_CMD_SUSPEND  0x4000  /* suspend CU after this command */
   #define IE_CMD_INTR     0x2000  /* post an interrupt after completion */
   
   /*
    * This is the command to transmit a frame.
    */
   struct ie_xmit_cmd {
           struct ie_cmd_common com;       /* common part */
   #define ie_xmit_status com.ie_cmd_status
   
           u_short ie_xmit_desc;           /* 16-pointer to buffer descriptor */
           struct ie_en_addr ie_xmit_addr; /* destination address */
   
           u_short ie_xmit_length;         /* 802.3 length/Ether type field */
   };
   
   #define IE_XS_MAXCOLL   0x000f  /* number of collisions during transmit */
   #define IE_XS_EXCMAX    0x0020  /* exceeded maximum number of collisions */
   #define IE_XS_SQE       0x0040  /* SQE positive */
   #define IE_XS_DEFERRED  0x0080  /* transmission deferred */
   #define IE_XS_UNDERRUN  0x0100  /* DMA underrun */
   #define IE_XS_LOSTCTS   0x0200  /* Lost CTS */
   #define IE_XS_NOCARRIER 0x0400  /* No Carrier */
   #define IE_XS_LATECOLL  0x0800  /* Late collision */
   
   /*
    * This is a buffer descriptor for a frame to be transmitted.
    */
   
   struct ie_xmit_buf {
           u_short ie_xmit_flags;          /* see below */
           u_short ie_xmit_next;           /* 16-pointer to next desc. */
           caddr_t ie_xmit_buf;            /* 24-pointer to the actual buffer */
   };
   
   #define IE_XMIT_LAST 0x8000     /* this TBD is the last one */
   /* The rest of the `flags' word is actually the length. */
   
   /*
    * Multicast setup command.
    */
   
   #define MAXMCAST 50             /* must fit in transmit buffer */
   
   struct ie_mcast_cmd {
           struct ie_cmd_common com;       /* common part */
   #define ie_mcast_status com.ie_cmd_status
   
           u_short ie_mcast_bytes; /* size (in bytes) of multicast addresses */
           struct ie_en_addr ie_mcast_addrs[MAXMCAST + 1]; /* space for them */
   };
   
   /*
    * Time Domain Reflectometer command.
    */
   
   struct ie_tdr_cmd {
           struct ie_cmd_common com;       /* common part */
   #define ie_tdr_status com.ie_cmd_status
   
           u_short ie_tdr_time;            /* error bits and time */
   };
   
   #define IE_TDR_SUCCESS  0x8000  /* TDR succeeded without error */
   #define IE_TDR_XCVR     0x4000  /* detected a transceiver problem */
   #define IE_TDR_OPEN     0x2000  /* detected an open */
   #define IE_TDR_SHORT    0x1000  /* TDR detected a short */
   #define IE_TDR_TIME     0x07ff  /* mask for reflection time */
   
   /*
    * Initial Address Setup command
    */
   struct ie_iasetup_cmd {
           struct ie_cmd_common com;
   #define ie_iasetup_status com.ie_cmd_status
   
           struct ie_en_addr ie_address;
   };
   
   /*
    * Configuration command
    */
   struct ie_config_cmd {
           struct ie_cmd_common com;       /* common part */
   #define ie_config_status com.ie_cmd_status
   
           u_char ie_config_count;         /* byte count (0x0c) */
           u_char ie_fifo;                 /* fifo (8) */
           u_char ie_save_bad;             /* save bad frames (0x40) */
           u_char ie_addr_len;             /* address length (0x2e) (AL-LOC == 1) */
           u_char ie_priority;             /* priority and backoff (0x0) */
           u_char ie_ifs;                  /* inter-frame spacing (0x60) */
           u_char ie_slot_low;             /* slot time, LSB (0x0) */
           u_char ie_slot_high;            /* slot time, MSN, and retries (0xf2) */
           u_char ie_promisc;              /* 1 if promiscuous, else 0 */
           u_char ie_crs_cdt;              /* CSMA/CD parameters (0x0) */
           u_char ie_min_len;              /* min frame length (0x40) */
           u_char ie_junk;                 /* stuff for 82596 (0xff) */
   };
   
   /*
    * Here are a few useful functions.  We could have done these as macros,
    * but since we have the inline facility, it makes sense to use that
    * instead.
    */
   static __inline void
   ie_setup_config(volatile struct ie_config_cmd *cmd,
                   int promiscuous, int manchester) {
           cmd->ie_config_count = 0x0c;
           cmd->ie_fifo = 8;
           cmd->ie_save_bad = 0x40;
           cmd->ie_addr_len = 0x2e;
           cmd->ie_priority = 0;
           cmd->ie_ifs = 0x60;
           cmd->ie_slot_low = 0;
           cmd->ie_slot_high = 0xf2;
           cmd->ie_promisc = !!promiscuous | manchester << 2;
           cmd->ie_crs_cdt = 0;
           cmd->ie_min_len = 64;
           cmd->ie_junk = 0xff;
   }
   
   static __inline void *
   Align(void *ptr) {
           uintptr_t l = (uintptr_t)ptr;
           l = (l + 3) & ~3L;
           return (void *)l;
   }
   
   static __inline volatile void *
   Alignvol(volatile void *ptr) {
           uintptr_t l = (uintptr_t)ptr;
           l = (l + 3) & ~3L;
           return (volatile void *)l;
   }
   
   #if 0
   static __inline void
   ie_ack(volatile struct ie_sys_ctl_block *scb,
                                     u_int mask, int unit,
                                     void (*ca)(int)) {
           scb->ie_command = scb->ie_status & mask;
           (*ca)(unit);
   }
   #endif

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