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