[6a9db57] | 1 | /* $NetBSD: i82586.c,v 1.38 2001/07/07 05:35:39 thorpej Exp $ */ |
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| 2 | |
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| 3 | /*- |
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| 4 | * Copyright (c) 1998 The NetBSD Foundation, Inc. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * This code is derived from software contributed to The NetBSD Foundation |
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| 8 | * by Paul Kranenburg and Charles M. Hannum. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * 3. All advertising materials mentioning features or use of this software |
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| 19 | * must display the following acknowledgement: |
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| 20 | * This product includes software developed by the NetBSD |
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| 21 | * Foundation, Inc. and its contributors. |
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| 22 | * 4. Neither the name of The NetBSD Foundation nor the names of its |
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| 23 | * contributors may be used to endorse or promote products derived |
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| 24 | * from this software without specific prior written permission. |
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| 25 | * |
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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| 27 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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| 28 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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| 29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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| 30 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 36 | * POSSIBILITY OF SUCH DAMAGE. |
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| 37 | */ |
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| 38 | |
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| 39 | /*- |
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| 40 | * Copyright (c) 1997 Paul Kranenburg. |
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| 41 | * Copyright (c) 1992, 1993, University of Vermont and State |
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| 42 | * Agricultural College. |
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| 43 | * Copyright (c) 1992, 1993, Garrett A. Wollman. |
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| 44 | * |
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| 45 | * Portions: |
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| 46 | * Copyright (c) 1994, 1995, Rafal K. Boni |
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| 47 | * Copyright (c) 1990, 1991, William F. Jolitz |
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| 48 | * Copyright (c) 1990, The Regents of the University of California |
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| 49 | * |
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| 50 | * RTEMS: |
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| 51 | * Copyright (c) 2001, Chris Johns, Cybertec Pty Ltd, |
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| 52 | * http://www.cybertec.com.au/. |
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| 53 | * |
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| 54 | * All rights reserved. |
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| 55 | * |
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| 56 | * Redistribution and use in source and binary forms, with or without |
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| 57 | * modification, are permitted provided that the following conditions |
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| 58 | * are met: |
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| 59 | * 1. Redistributions of source code must retain the above copyright |
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| 60 | * notice, this list of conditions and the following disclaimer. |
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| 61 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 62 | * notice, this list of conditions and the following disclaimer in the |
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| 63 | * documentation and/or other materials provided with the distribution. |
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| 64 | * 3. All advertising materials mentioning features or use of this software |
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| 65 | * must display the following acknowledgement: |
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| 66 | * This product includes software developed by the University of Vermont |
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| 67 | * and State Agricultural College and Garrett A. Wollman, by William F. |
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| 68 | * Jolitz, and by the University of California, Berkeley, Lawrence |
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| 69 | * Berkeley Laboratory, and its contributors. |
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| 70 | * 4. Neither the names of the Universities nor the names of the authors |
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| 71 | * may be used to endorse or promote products derived from this software |
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| 72 | * without specific prior written permission. |
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| 73 | * |
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| 74 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 75 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 76 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 77 | * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR AUTHORS BE LIABLE |
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| 78 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 79 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 80 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 81 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 82 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 83 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 84 | * SUCH DAMAGE. |
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| 85 | */ |
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| 86 | |
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| 87 | /* |
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| 88 | * Intel 82586 Ethernet chip |
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| 89 | * Register, bit, and structure definitions. |
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| 90 | * |
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| 91 | * Original StarLAN driver written by Garrett Wollman with reference to the |
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| 92 | * Clarkson Packet Driver code for this chip written by Russ Nelson and others. |
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| 93 | * |
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| 94 | * BPF support code taken from hpdev/if_le.c, supplied with tcpdump. |
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| 95 | * |
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| 96 | * 3C507 support is loosely based on code donated to NetBSD by Rafal Boni. |
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| 97 | * |
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| 98 | * Majorly cleaned up and 3C507 code merged by Charles Hannum. |
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| 99 | * |
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| 100 | * Converted to SUN ie driver by Charles D. Cranor, |
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| 101 | * October 1994, January 1995. |
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| 102 | * This sun version based on i386 version 1.30. |
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| 103 | */ |
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| 104 | |
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| 105 | /* |
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| 106 | * The i82586 is a very painful chip, found in sun3's, sun-4/100's |
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| 107 | * sun-4/200's, and VME based suns. The byte order is all wrong for a |
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| 108 | * SUN, making life difficult. Programming this chip is mostly the same, |
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| 109 | * but certain details differ from system to system. This driver is |
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| 110 | * written so that different "ie" interfaces can be controled by the same |
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| 111 | * driver. |
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| 112 | */ |
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| 113 | |
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| 114 | /* |
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| 115 | Mode of operation: |
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| 116 | |
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| 117 | We run the 82586 in a standard Ethernet mode. We keep NFRAMES |
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| 118 | received frame descriptors around for the receiver to use, and |
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| 119 | NRXBUF associated receive buffer descriptors, both in a circular |
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| 120 | list. Whenever a frame is received, we rotate both lists as |
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| 121 | necessary. (The 586 treats both lists as a simple queue.) We also |
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| 122 | keep a transmit command around so that packets can be sent off |
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| 123 | quickly. |
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| 124 | |
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| 125 | We configure the adapter in AL-LOC = 1 mode, which means that the |
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| 126 | Ethernet/802.3 MAC header is placed at the beginning of the receive |
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| 127 | buffer rather than being split off into various fields in the RFD. |
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| 128 | This also means that we must include this header in the transmit |
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| 129 | buffer as well. |
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| 130 | |
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| 131 | By convention, all transmit commands, and only transmit commands, |
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| 132 | shall have the I (IE_CMD_INTR) bit set in the command. This way, |
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| 133 | when an interrupt arrives at i82586_intr(), it is immediately possible |
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| 134 | to tell what precisely caused it. ANY OTHER command-sending |
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| 135 | routines should run at splnet(), and should post an acknowledgement |
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| 136 | to every interrupt they generate. |
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| 137 | |
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| 138 | To save the expense of shipping a command to 82586 every time we |
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| 139 | want to send a frame, we use a linked list of commands consisting |
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| 140 | of alternate XMIT and NOP commands. The links of these elements |
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| 141 | are manipulated (in iexmit()) such that the NOP command loops back |
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| 142 | to itself whenever the following XMIT command is not yet ready to |
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| 143 | go. Whenever an XMIT is ready, the preceding NOP link is pointed |
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| 144 | at it, while its own link field points to the following NOP command. |
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| 145 | Thus, a single transmit command sets off an interlocked traversal |
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| 146 | of the xmit command chain, with the host processor in control of |
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| 147 | the synchronization. |
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| 148 | */ |
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| 149 | |
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| 150 | #include <rtems.h> |
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| 151 | #include <rtems/error.h> |
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| 152 | #include <rtems/rtems_bsdnet.h> |
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| 153 | |
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| 154 | #include <ctype.h> |
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| 155 | #include <stdio.h> |
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| 156 | |
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| 157 | #include <sys/param.h> |
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| 158 | #include <sys/mbuf.h> |
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| 159 | #include <sys/socket.h> |
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| 160 | #include <sys/sockio.h> |
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| 161 | #include <sys/ioctl.h> |
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| 162 | #include <sys/errno.h> |
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| 163 | |
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| 164 | #include <net/ethernet.h> |
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| 165 | #include <net/if.h> |
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| 166 | #include <net/if_types.h> |
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| 167 | #include <net/if_dl.h> |
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| 168 | |
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| 169 | #include <netinet/in.h> |
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| 170 | #include <netinet/if_ether.h> |
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| 171 | |
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| 172 | #include "i82586reg.h" |
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| 173 | #include "i82586var.h" |
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| 174 | |
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| 175 | /* |
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| 176 | * A global way to change all async cmd requests at once. For RTEMS and running |
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| 177 | * as tasks I wanted to see if the tx race condition is effected by this. |
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| 178 | */ |
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| 179 | #define ASYNC_OPTION (1) |
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| 180 | |
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| 181 | void i82586_reset (struct ie_softc *, int); |
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| 182 | void i82586_watchdog (struct ifnet *); |
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| 183 | void i82586_init (void *); |
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| 184 | int i82586_ioctl (struct ifnet *, int cmd, caddr_t data); |
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| 185 | void i82586_start (struct ifnet *); |
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| 186 | |
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| 187 | void i82586_stop (struct ifnet *, int); |
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| 188 | int i82586_rint (struct ie_softc *, int); |
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| 189 | int i82586_tint (struct ie_softc *, int); |
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| 190 | |
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| 191 | int i82586_mediachange (struct ifnet *); |
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| 192 | void i82586_mediastatus (struct ifnet *, struct ifmediareq *); |
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| 193 | |
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| 194 | static void i82586_tx_task(void *arg); |
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| 195 | static void i82586_start_tx(struct ie_softc *sc); |
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| 196 | |
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| 197 | static int ie_readframe (struct ie_softc *, int); |
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| 198 | static struct mbuf *ieget (struct ie_softc *, int, int); |
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| 199 | static int i82586_get_rbd_list (struct ie_softc *, u_int16_t *, |
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| 200 | u_int16_t *, int *); |
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| 201 | static void i82586_release_rbd_list (struct ie_softc *, |
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| 202 | u_int16_t, u_int16_t); |
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| 203 | static int i82586_drop_frames (struct ie_softc *); |
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| 204 | static int i82586_chk_rx_ring (struct ie_softc *); |
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| 205 | |
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| 206 | static __inline__ void ie_ack (struct ie_softc *, u_int); |
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| 207 | static __inline__ void iexmit (struct ie_softc *); |
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| 208 | static void i82586_start_transceiver (struct ie_softc *); |
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| 209 | |
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| 210 | static void i82586_count_errors (struct ie_softc *); |
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| 211 | static void i82586_rx_errors (struct ie_softc *, int, int); |
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| 212 | static void i82586_setup_bufs (struct ie_softc *); |
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| 213 | static void setup_simple_command (struct ie_softc *, int, int); |
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| 214 | static int ie_cfg_setup (struct ie_softc *, int, int, int); |
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| 215 | static int ie_ia_setup (struct ie_softc *, int); |
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| 216 | static void ie_run_tdr (struct ie_softc *, int); |
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| 217 | static int ie_mc_setup (struct ie_softc *, int); |
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| 218 | static void ie_mc_reset (struct ie_softc *); |
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| 219 | static int i82586_start_cmd (struct ie_softc *, int, int, int, int); |
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| 220 | static int i82586_cmd_wait (struct ie_softc *); |
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| 221 | |
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| 222 | #if I82586_DEBUG |
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| 223 | static void print_softie(struct ie_softc *sc); |
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| 224 | static void print_rbd (struct ie_softc *, int); |
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| 225 | #endif |
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| 226 | |
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| 227 | #define min(l,r) ((l) < (r) ? (l) : (r)) |
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| 228 | #define max(l,r) ((l) > (r) ? (l) : (r)) |
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| 229 | |
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| 230 | #define delay(p) rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (p)) |
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| 231 | |
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| 232 | #define i82586_WAKE_EVENT RTEMS_EVENT_1 |
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| 233 | #define i82586_TX_EVENT RTEMS_EVENT_2 |
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| 234 | |
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| 235 | char *bitmask_snprintf(unsigned long value, const char *format, char *buf, int blen) |
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| 236 | { |
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| 237 | char *b = buf; |
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| 238 | int bit = 31; |
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| 239 | |
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| 240 | while (bit-- > *format) |
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| 241 | value <<= 1; |
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| 242 | |
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| 243 | format++; |
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| 244 | |
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| 245 | while (*format) |
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| 246 | { |
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| 247 | if (value & 0x80000000) |
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| 248 | while (isalnum(*format)) |
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| 249 | *b++ = *format; |
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| 250 | else |
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| 251 | *b++ = '0'; |
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| 252 | |
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| 253 | *b++ = ','; |
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| 254 | |
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| 255 | while (bit-- > *format) |
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| 256 | value <<= 1; |
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| 257 | |
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| 258 | format++; |
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| 259 | } |
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| 260 | |
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| 261 | *b = '\0'; |
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| 262 | return buf; |
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| 263 | } |
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| 264 | |
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| 265 | char *ether_sprintf(unsigned char *addr) |
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| 266 | { |
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| 267 | static char buf[32]; |
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| 268 | char *b = buf; |
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| 269 | int i; |
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| 270 | |
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| 271 | for (i = 0; i < ETHER_ADDR_LEN; i++) |
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| 272 | { |
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| 273 | sprintf(b, "%02x:", *addr++); |
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| 274 | b += 3; |
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| 275 | } |
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| 276 | b--; |
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| 277 | b = "\0"; |
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| 278 | return buf; |
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| 279 | } |
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| 280 | |
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| 281 | /* |
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| 282 | * Front-ends call this function to attach to the MI driver. |
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| 283 | * |
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| 284 | * The front-end has responsibility for managing the ICP and ISCP |
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| 285 | * structures. Both of these are opaque to us. Also, the front-end |
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| 286 | * chooses a location for the SCB which is expected to be addressable |
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| 287 | * (through `sc->scb') as an offset against the shared-memory bus handle. |
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| 288 | * |
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| 289 | * The following MD interface function must be setup by the front-end |
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| 290 | * before calling here: |
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| 291 | * |
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| 292 | * hwreset - board dependent reset |
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| 293 | * hwinit - board dependent initialization |
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| 294 | * chan_attn - channel attention |
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| 295 | * intrhook - board dependent interrupt processing |
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| 296 | * memcopyin - shared memory copy: board to KVA |
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| 297 | * memcopyout - shared memory copy: KVA to board |
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| 298 | * ie_bus_read16 - read a sixteen-bit i82586 pointer |
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| 299 | * ie_bus_write16 - write a sixteen-bit i82586 pointer |
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| 300 | * ie_bus_write24 - write a twenty-four-bit i82586 pointer |
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| 301 | * |
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| 302 | */ |
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| 303 | int |
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| 304 | i82586_attach(struct rtems_bsdnet_ifconfig *config, int attaching) |
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| 305 | { |
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| 306 | struct ie_softc *sc; |
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| 307 | struct ifnet *ifp; |
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| 308 | char *name; |
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| 309 | int unit; |
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| 310 | int mtu; |
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| 311 | |
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| 312 | /* |
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| 313 | * Parse driver name |
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| 314 | */ |
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| 315 | |
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| 316 | if ((unit = rtems_bsdnet_parse_driver_name (config, &name)) < 0) |
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| 317 | return 0; |
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| 318 | |
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| 319 | sc = config->drv_ctrl; |
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| 320 | ifp = &sc->arpcom.ac_if; |
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| 321 | |
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| 322 | #if I82586_DEBUG |
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| 323 | sc->sc_debug = 0; //IED_TINT | IED_XMIT; |
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| 324 | #endif |
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| 325 | |
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| 326 | if (attaching) |
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| 327 | { |
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| 328 | if (ifp->if_softc) |
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| 329 | { |
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| 330 | printf ("Driver `%s' already in use.\n", config->name); |
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| 331 | return 0; |
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| 332 | } |
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| 333 | |
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| 334 | /* |
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| 335 | * Process options |
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| 336 | */ |
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| 337 | |
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| 338 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
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| 339 | |
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| 340 | if (config->mtu) |
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| 341 | mtu = config->mtu; |
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| 342 | else |
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| 343 | mtu = ETHERMTU; |
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| 344 | |
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| 345 | ifp->if_softc = sc; |
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| 346 | ifp->if_unit = unit; |
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| 347 | ifp->if_name = name; |
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| 348 | ifp->if_mtu = mtu; |
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| 349 | ifp->if_init = i82586_init; |
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| 350 | ifp->if_ioctl = i82586_ioctl; |
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| 351 | ifp->if_start = i82586_start; |
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| 352 | ifp->if_output = ether_output; |
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| 353 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; |
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| 354 | |
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| 355 | if (ifp->if_snd.ifq_maxlen == 0) |
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| 356 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
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| 357 | |
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| 358 | /* Attach the interface. */ |
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| 359 | if_attach(ifp); |
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| 360 | ether_ifattach(ifp); |
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| 361 | return 1; |
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| 362 | } |
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| 363 | return 0; |
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| 364 | } |
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| 365 | |
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| 366 | |
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| 367 | /* |
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| 368 | * Interrupt Acknowledge. Mask in native byte-order. |
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| 369 | */ |
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| 370 | static __inline__ void |
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| 371 | ie_ack(struct ie_softc *sc, u_int mask) |
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| 372 | { |
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| 373 | u_int status; |
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| 374 | |
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| 375 | IE_BUS_BARRIER(sc, 0, 0, BUS_SPACE_BARRIER_READ); |
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| 376 | status = sc->ie_bus_read16(sc, IE_SCB_STATUS(sc->scb)); |
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| 377 | i82586_start_cmd(sc, status & mask, 0, 0, 0); |
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| 378 | if (sc->intrhook) |
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| 379 | sc->intrhook(sc, INTR_ACK); |
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| 380 | } |
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| 381 | |
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| 382 | |
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| 383 | /* |
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| 384 | * Read data off the interface, and turn it into an mbuf chain. |
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| 385 | * |
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| 386 | * This code is DRAMATICALLY different from the previous version; this |
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| 387 | * version tries to allocate the entire mbuf chain up front, given the |
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| 388 | * length of the data available. This enables us to allocate mbuf |
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| 389 | * clusters in many situations where before we would have had a long |
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| 390 | * chain of partially-full mbufs. This should help to speed up the |
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| 391 | * operation considerably. (Provided that it works, of course.) |
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| 392 | */ |
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| 393 | static __inline struct mbuf * |
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| 394 | ieget(struct ie_softc *sc, int head, int totlen) |
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| 395 | { |
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| 396 | struct mbuf *m, *m0, *newm; |
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| 397 | int len, resid; |
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| 398 | int thisrboff, thismboff; |
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| 399 | struct ether_header eh; |
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| 400 | |
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| 401 | /* |
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| 402 | * Snarf the Ethernet header. |
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| 403 | */ |
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| 404 | (sc->memcopyin)(sc, &eh, IE_RBUF_ADDR(sc, head), |
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| 405 | sizeof(struct ether_header)); |
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| 406 | |
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| 407 | resid = totlen; |
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| 408 | |
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| 409 | MGETHDR(m0, M_DONTWAIT, MT_DATA); |
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| 410 | if (m0 == 0) |
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| 411 | return (0); |
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| 412 | m0->m_pkthdr.rcvif = &sc->arpcom.ac_if; |
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| 413 | m0->m_pkthdr.len = totlen; |
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| 414 | len = MHLEN; |
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| 415 | m = m0; |
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| 416 | |
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| 417 | /* |
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| 418 | * This loop goes through and allocates mbufs for all the data we will |
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| 419 | * be copying in. It does not actually do the copying yet. |
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| 420 | */ |
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| 421 | while (totlen > 0) { |
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| 422 | if (totlen >= MINCLSIZE) { |
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| 423 | MCLGET(m, M_DONTWAIT); |
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| 424 | if ((m->m_flags & M_EXT) == 0) |
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| 425 | goto bad; |
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| 426 | len = MCLBYTES; |
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| 427 | } |
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| 428 | |
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| 429 | if (m == m0) { |
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| 430 | caddr_t newdata = (caddr_t) |
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| 431 | ALIGN(m->m_data + sizeof(struct ether_header)) - |
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| 432 | sizeof(struct ether_header); |
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| 433 | len -= newdata - m->m_data; |
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| 434 | m->m_data = newdata; |
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| 435 | } |
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| 436 | |
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| 437 | m->m_len = len = min(totlen, len); |
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| 438 | |
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| 439 | totlen -= len; |
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| 440 | if (totlen > 0) { |
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| 441 | MGET(newm, M_DONTWAIT, MT_DATA); |
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| 442 | if (newm == 0) |
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| 443 | goto bad; |
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| 444 | len = MLEN; |
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| 445 | m = m->m_next = newm; |
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| 446 | } |
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| 447 | } |
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| 448 | |
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| 449 | m = m0; |
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| 450 | thismboff = 0; |
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| 451 | |
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| 452 | /* |
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| 453 | * Copy the Ethernet header into the mbuf chain. |
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| 454 | */ |
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| 455 | memcpy(mtod(m, caddr_t), &eh, sizeof(struct ether_header)); |
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| 456 | thismboff = sizeof(struct ether_header); |
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| 457 | thisrboff = sizeof(struct ether_header); |
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| 458 | resid -= sizeof(struct ether_header); |
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| 459 | |
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| 460 | /* |
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| 461 | * Now we take the mbuf chain (hopefully only one mbuf most of the |
---|
| 462 | * time) and stuff the data into it. There are no possible failures |
---|
| 463 | * at or after this point. |
---|
| 464 | */ |
---|
| 465 | while (resid > 0) { |
---|
| 466 | int thisrblen = IE_RBUF_SIZE - thisrboff, |
---|
| 467 | thismblen = m->m_len - thismboff; |
---|
| 468 | len = min(thisrblen, thismblen); |
---|
| 469 | |
---|
| 470 | (sc->memcopyin)(sc, mtod(m, caddr_t) + thismboff, |
---|
| 471 | IE_RBUF_ADDR(sc,head) + thisrboff, |
---|
| 472 | (u_int)len); |
---|
| 473 | resid -= len; |
---|
| 474 | |
---|
| 475 | if (len == thismblen) { |
---|
| 476 | m = m->m_next; |
---|
| 477 | thismboff = 0; |
---|
| 478 | } else |
---|
| 479 | thismboff += len; |
---|
| 480 | |
---|
| 481 | if (len == thisrblen) { |
---|
| 482 | if (++head == sc->nrxbuf) |
---|
| 483 | head = 0; |
---|
| 484 | thisrboff = 0; |
---|
| 485 | } else |
---|
| 486 | thisrboff += len; |
---|
| 487 | } |
---|
| 488 | |
---|
| 489 | /* |
---|
| 490 | * Unless something changed strangely while we were doing the copy, |
---|
| 491 | * we have now copied everything in from the shared memory. |
---|
| 492 | * This means that we are done. |
---|
| 493 | */ |
---|
| 494 | return (m0); |
---|
| 495 | |
---|
| 496 | bad: |
---|
| 497 | m_freem(m0); |
---|
| 498 | return (0); |
---|
| 499 | } |
---|
| 500 | |
---|
| 501 | /* |
---|
| 502 | * Setup all necessary artifacts for an XMIT command, and then pass the XMIT |
---|
| 503 | * command to the chip to be executed. |
---|
| 504 | */ |
---|
| 505 | static __inline__ void |
---|
| 506 | iexmit(struct ie_softc *sc) |
---|
| 507 | { |
---|
| 508 | int off; |
---|
| 509 | int cur, prev; |
---|
| 510 | |
---|
| 511 | cur = sc->xctail; |
---|
| 512 | |
---|
| 513 | #if I82586_DEBUG |
---|
| 514 | I82586_TRACE(sc, I82586_TX_EMIT, cur); |
---|
| 515 | #endif |
---|
| 516 | |
---|
| 517 | #if I82586_DEBUG |
---|
| 518 | if (sc->sc_debug & IED_XMIT) |
---|
| 519 | printf("%s: xmit buffer %d\n", sc->arpcom.ac_if.if_name, cur); |
---|
| 520 | #endif |
---|
| 521 | |
---|
| 522 | /* |
---|
| 523 | * Setup the transmit command. |
---|
| 524 | */ |
---|
| 525 | sc->ie_bus_write16(sc, IE_CMD_XMIT_DESC(sc->xmit_cmds, cur), |
---|
| 526 | IE_XBD_ADDR(sc->xbds, cur)); |
---|
| 527 | |
---|
| 528 | sc->ie_bus_write16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, cur), 0); |
---|
| 529 | |
---|
| 530 | if (sc->do_xmitnopchain) { |
---|
| 531 | /* |
---|
| 532 | * Gate this XMIT command to the following NOP |
---|
| 533 | */ |
---|
| 534 | sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds, cur), |
---|
| 535 | IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); |
---|
| 536 | sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), |
---|
| 537 | IE_CMD_XMIT | IE_CMD_INTR); |
---|
| 538 | |
---|
| 539 | /* |
---|
| 540 | * Loopback at following NOP |
---|
| 541 | */ |
---|
| 542 | sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, cur), 0); |
---|
| 543 | sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, cur), |
---|
| 544 | IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); |
---|
| 545 | |
---|
| 546 | /* |
---|
| 547 | * Gate preceding NOP to this XMIT command |
---|
| 548 | */ |
---|
| 549 | prev = (cur + NTXBUF - 1) % NTXBUF; |
---|
| 550 | sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, prev), 0); |
---|
| 551 | sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, prev), |
---|
| 552 | IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); |
---|
| 553 | |
---|
| 554 | off = IE_SCB_STATUS(sc->scb); |
---|
| 555 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 556 | if ((sc->ie_bus_read16(sc, off) & IE_CUS_ACTIVE) == 0) { |
---|
| 557 | printf("iexmit: CU not active\n"); |
---|
| 558 | i82586_start_transceiver(sc); |
---|
| 559 | } |
---|
| 560 | } else { |
---|
| 561 | sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds,cur), |
---|
| 562 | 0xffff); |
---|
| 563 | |
---|
| 564 | sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), |
---|
| 565 | IE_CMD_XMIT | IE_CMD_INTR | IE_CMD_LAST); |
---|
| 566 | |
---|
| 567 | off = IE_SCB_CMDLST(sc->scb); |
---|
| 568 | sc->ie_bus_write16(sc, off, IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); |
---|
| 569 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 570 | |
---|
| 571 | if (i82586_start_cmd(sc, IE_CUC_START, 0, 0, ASYNC_OPTION)) |
---|
| 572 | printf("%s: iexmit: start xmit command timed out\n", |
---|
| 573 | sc->arpcom.ac_if.if_name); |
---|
| 574 | } |
---|
| 575 | |
---|
| 576 | sc->arpcom.ac_if.if_timer = 5; |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | |
---|
| 580 | /* |
---|
| 581 | * Device timeout/watchdog routine. |
---|
| 582 | * Entered if the device neglects to generate an interrupt after a |
---|
| 583 | * transmit has been started on it. |
---|
| 584 | */ |
---|
| 585 | void |
---|
| 586 | i82586_watchdog(struct ifnet *ifp) |
---|
| 587 | { |
---|
| 588 | struct ie_softc *sc = ifp->if_softc; |
---|
| 589 | printf("%s: device timeout\n", ifp->if_name); |
---|
| 590 | ++ifp->if_oerrors; |
---|
| 591 | i82586_reset(sc, 1); |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | static int |
---|
| 595 | i82586_cmd_wait(struct ie_softc *sc) |
---|
| 596 | { |
---|
| 597 | /* spin on i82586 command acknowledge; wait at most 0.9 (!) seconds */ |
---|
| 598 | int i, off; |
---|
| 599 | u_int16_t cmd; |
---|
| 600 | |
---|
| 601 | for (i = 0; i < 900000; i++) { |
---|
| 602 | /* Read the command word */ |
---|
| 603 | off = IE_SCB_CMD(sc->scb); |
---|
| 604 | |
---|
| 605 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 606 | if ((cmd = sc->ie_bus_read16(sc, off)) == 0) |
---|
| 607 | return (0); |
---|
| 608 | delay(1); |
---|
| 609 | } |
---|
| 610 | |
---|
| 611 | off = IE_SCB_STATUS(sc->scb); |
---|
| 612 | printf("i82586_cmd_wait: timo(%ssync): scb status: 0x%x, cmd: 0x%x\n", |
---|
| 613 | sc->async_cmd_inprogress?"a":"", |
---|
| 614 | sc->ie_bus_read16(sc, off), cmd); |
---|
| 615 | |
---|
| 616 | return (1); /* Timeout */ |
---|
| 617 | } |
---|
| 618 | |
---|
| 619 | /* |
---|
| 620 | * Send a command to the controller and wait for it to either complete |
---|
| 621 | * or be accepted, depending on the command. If the command pointer |
---|
| 622 | * is null, then pretend that the command is not an action command. |
---|
| 623 | * If the command pointer is not null, and the command is an action |
---|
| 624 | * command, wait for one of the MASK bits to turn on in the command's |
---|
| 625 | * status field. |
---|
| 626 | * If ASYNC is set, we just call the chip's attention and return. |
---|
| 627 | * We may have to wait for the command's acceptance later though. |
---|
| 628 | */ |
---|
| 629 | static int |
---|
| 630 | i82586_start_cmd(struct ie_softc *sc, int cmd, int iecmdbuf, int mask, int async) |
---|
| 631 | { |
---|
| 632 | int i; |
---|
| 633 | int off; |
---|
| 634 | |
---|
| 635 | if (sc->async_cmd_inprogress != 0) { |
---|
| 636 | /* |
---|
| 637 | * If previous command was issued asynchronously, wait |
---|
| 638 | * for it now. |
---|
| 639 | */ |
---|
| 640 | if (i82586_cmd_wait(sc) != 0) |
---|
| 641 | return (1); |
---|
| 642 | sc->async_cmd_inprogress = 0; |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | off = IE_SCB_CMD(sc->scb); |
---|
| 646 | sc->ie_bus_write16(sc, off, cmd); |
---|
| 647 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); |
---|
| 648 | (sc->chan_attn)(sc, CARD_RESET); |
---|
| 649 | |
---|
| 650 | if (async != 0) { |
---|
| 651 | sc->async_cmd_inprogress = 1; |
---|
| 652 | return (0); |
---|
| 653 | } |
---|
| 654 | |
---|
| 655 | if (IE_ACTION_COMMAND(cmd) && iecmdbuf) { |
---|
| 656 | int status; |
---|
| 657 | /* |
---|
| 658 | * Now spin-lock waiting for status. This is not a very nice |
---|
| 659 | * thing to do, and can kill performance pretty well... |
---|
| 660 | * According to the packet driver, the minimum timeout |
---|
| 661 | * should be .369 seconds. |
---|
| 662 | */ |
---|
| 663 | for (i = 0; i < 369000; i++) { |
---|
| 664 | /* Read the command status */ |
---|
| 665 | off = IE_CMD_COMMON_STATUS(iecmdbuf); |
---|
| 666 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 667 | status = sc->ie_bus_read16(sc, off); |
---|
| 668 | if (status & mask) |
---|
| 669 | return (0); |
---|
| 670 | delay(1); |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | } else { |
---|
| 674 | /* |
---|
| 675 | * Otherwise, just wait for the command to be accepted. |
---|
| 676 | */ |
---|
| 677 | return (i82586_cmd_wait(sc)); |
---|
| 678 | } |
---|
| 679 | |
---|
| 680 | /* Timeout */ |
---|
| 681 | return (1); |
---|
| 682 | } |
---|
| 683 | |
---|
| 684 | |
---|
| 685 | /* |
---|
| 686 | * Transfer accumulated chip error counters to IF. |
---|
| 687 | */ |
---|
| 688 | static __inline void |
---|
| 689 | i82586_count_errors(struct ie_softc *sc) |
---|
| 690 | { |
---|
| 691 | int scb = sc->scb; |
---|
| 692 | |
---|
| 693 | sc->arpcom.ac_if.if_ierrors += |
---|
| 694 | sc->ie_bus_read16(sc, IE_SCB_ERRCRC(scb)) + |
---|
| 695 | sc->ie_bus_read16(sc, IE_SCB_ERRALN(scb)) + |
---|
| 696 | sc->ie_bus_read16(sc, IE_SCB_ERRRES(scb)) + |
---|
| 697 | sc->ie_bus_read16(sc, IE_SCB_ERROVR(scb)); |
---|
| 698 | |
---|
| 699 | /* Clear error counters */ |
---|
| 700 | sc->ie_bus_write16(sc, IE_SCB_ERRCRC(scb), 0); |
---|
| 701 | sc->ie_bus_write16(sc, IE_SCB_ERRALN(scb), 0); |
---|
| 702 | sc->ie_bus_write16(sc, IE_SCB_ERRRES(scb), 0); |
---|
| 703 | sc->ie_bus_write16(sc, IE_SCB_ERROVR(scb), 0); |
---|
| 704 | } |
---|
| 705 | |
---|
| 706 | |
---|
| 707 | static void |
---|
| 708 | i82586_rx_errors(struct ie_softc *sc, int fn, int status) |
---|
| 709 | { |
---|
| 710 | char bits[128]; |
---|
| 711 | |
---|
| 712 | printf("%s: rx error (frame# %d): %s\n", sc->arpcom.ac_if.if_name, fn, |
---|
| 713 | bitmask_snprintf(status, IE_FD_STATUSBITS, bits, sizeof(bits))); |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | /* |
---|
| 717 | * i82586 interrupt entry point. |
---|
| 718 | */ |
---|
| 719 | rtems_isr |
---|
| 720 | i82586_intr(rtems_vector_number vec, void *arg) |
---|
| 721 | { |
---|
| 722 | struct ie_softc *sc = arg; |
---|
| 723 | |
---|
| 724 | #if I82586_DEBUG |
---|
| 725 | static unsigned long icnt = 0; |
---|
| 726 | I82586_TRACE(sc, I82586_INTS_REQ, icnt++); |
---|
| 727 | #endif |
---|
| 728 | |
---|
| 729 | /* |
---|
| 730 | * Implementation dependent interrupt handling. It must at least |
---|
| 731 | * disabled interrupts from the i82586. It is hoped this can |
---|
| 732 | * happen somewhere outside the i82586. |
---|
| 733 | */ |
---|
| 734 | if (sc->intrhook) |
---|
| 735 | (sc->intrhook)(sc, INTR_ENTER); |
---|
| 736 | |
---|
| 737 | /* |
---|
| 738 | * Wake the task to handle the interrupt. It will |
---|
| 739 | * enabled the interrupts when it has finished. |
---|
| 740 | */ |
---|
| 741 | rtems_event_send (sc->intr_task, i82586_WAKE_EVENT); |
---|
| 742 | } |
---|
| 743 | |
---|
| 744 | /* |
---|
| 745 | * i82586 interrupt task. The task is actually an extension of the interrupt |
---|
| 746 | * with a context switch in the middle. The RTEMS TCP/IP stack requires a task |
---|
| 747 | * be used to talk to the stack as a network semaphore is claimed. This |
---|
| 748 | * cannot happen during an interrupt. |
---|
| 749 | */ |
---|
| 750 | static void |
---|
| 751 | i82586_intr_task(void *arg) |
---|
| 752 | { |
---|
| 753 | struct ie_softc *sc = arg; |
---|
| 754 | rtems_event_set events; |
---|
| 755 | u_int status; |
---|
| 756 | int off; |
---|
| 757 | int reset; |
---|
| 758 | |
---|
| 759 | /* |
---|
| 760 | * Not sure this is a good idea but as a out path exists and |
---|
| 761 | * roads lead to it, it seems ok. |
---|
| 762 | */ |
---|
| 763 | for (;;) { |
---|
| 764 | rtems_bsdnet_event_receive (i82586_WAKE_EVENT, |
---|
| 765 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
| 766 | 0, &events); |
---|
| 767 | |
---|
| 768 | off = IE_SCB_STATUS(sc->scb); |
---|
| 769 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 770 | status = sc->ie_bus_read16(sc, off) & IE_ST_WHENCE; |
---|
| 771 | |
---|
| 772 | #if I82586_DEBUG |
---|
| 773 | I82586_TRACE(sc, I82586_INTS_IN, status); |
---|
| 774 | #endif |
---|
| 775 | |
---|
| 776 | reset = 0; |
---|
| 777 | |
---|
| 778 | while ((status & IE_ST_WHENCE) != 0) { |
---|
| 779 | #if I82586_DEBUG |
---|
| 780 | if (sc->sc_debug) |
---|
| 781 | printf ("%s: -------\n%s: scbstatus=0x%x\n", |
---|
| 782 | sc->arpcom.ac_if.if_name, sc->arpcom.ac_if.if_name, status); |
---|
| 783 | #endif |
---|
| 784 | |
---|
| 785 | #if 1 |
---|
| 786 | /* Ack interrupts FIRST in case we receive more during the ISR. */ |
---|
| 787 | ie_ack(sc, status & IE_ST_WHENCE); |
---|
| 788 | #endif |
---|
| 789 | |
---|
| 790 | i82586_start_cmd(sc, status & IE_ST_WHENCE, 0, 0, ASYNC_OPTION); |
---|
| 791 | |
---|
| 792 | if (status & (IE_ST_FR | IE_ST_RNR)) |
---|
| 793 | if (i82586_rint(sc, status) != 0) { |
---|
| 794 | reset = 1; |
---|
| 795 | break; |
---|
| 796 | } |
---|
| 797 | |
---|
| 798 | if (status & IE_ST_CX) |
---|
| 799 | if (i82586_tint(sc, status) != 0) { |
---|
| 800 | reset = 1; |
---|
| 801 | break; |
---|
| 802 | } |
---|
| 803 | |
---|
| 804 | #if I82586_DEBUG |
---|
| 805 | if ((status & IE_ST_CNA) && (sc->sc_debug & IED_CNA)) |
---|
| 806 | printf("%s: cna; status=0x%x\n", sc->arpcom.ac_if.if_name, status); |
---|
| 807 | #endif |
---|
| 808 | |
---|
| 809 | #if 0 |
---|
| 810 | if (sc->intrhook) |
---|
| 811 | (sc->intrhook)(sc, INTR_LOOP); |
---|
| 812 | #endif |
---|
| 813 | |
---|
| 814 | #if 1 |
---|
| 815 | /* |
---|
| 816 | * Interrupt ACK was posted asynchronously; wait for |
---|
| 817 | * completion here before reading SCB status again. |
---|
| 818 | * |
---|
| 819 | * If ACK fails, try to reset the chip, in hopes that |
---|
| 820 | * it helps. |
---|
| 821 | */ |
---|
| 822 | if (i82586_cmd_wait(sc) != 0) { |
---|
| 823 | reset = 1; |
---|
| 824 | break; |
---|
| 825 | } |
---|
| 826 | #endif |
---|
| 827 | |
---|
| 828 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 829 | status = sc->ie_bus_read16(sc, off); |
---|
| 830 | #if I82586_DEBUG |
---|
| 831 | I82586_TRACE(sc, I82586_INTS_LOOPS, status); |
---|
| 832 | #endif |
---|
| 833 | } |
---|
| 834 | |
---|
| 835 | if (reset) { |
---|
| 836 | #if I82586_DEBUG |
---|
| 837 | printf("%s: intr reset; status=0x%x\n", sc->arpcom.ac_if.if_name, status); |
---|
| 838 | #endif |
---|
| 839 | i82586_cmd_wait(sc); |
---|
| 840 | i82586_reset(sc, 1); |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | #if I82586_DEBUG |
---|
| 844 | I82586_TRACE(sc, I82586_INTS_OUT, status); |
---|
| 845 | #endif |
---|
| 846 | |
---|
| 847 | if (sc->intrhook) |
---|
| 848 | (sc->intrhook)(sc, INTR_EXIT); |
---|
| 849 | } |
---|
| 850 | } |
---|
| 851 | |
---|
| 852 | /* |
---|
| 853 | * Process a received-frame interrupt. |
---|
| 854 | */ |
---|
| 855 | int |
---|
| 856 | i82586_rint(struct ie_softc *sc, int scbstatus) |
---|
| 857 | { |
---|
| 858 | static int timesthru = 1024; |
---|
| 859 | int i, status, off; |
---|
| 860 | |
---|
| 861 | #if I82586_DEBUG |
---|
| 862 | I82586_TRACE(sc, I82586_RX_INT, scbstatus); |
---|
| 863 | |
---|
| 864 | if (sc->sc_debug & IED_RINT) |
---|
| 865 | printf("%s: rint: status 0x%x\n", |
---|
| 866 | sc->arpcom.ac_if.if_name, scbstatus); |
---|
| 867 | #endif |
---|
| 868 | |
---|
| 869 | for (;;) { |
---|
| 870 | int drop = 0; |
---|
| 871 | |
---|
| 872 | i = sc->rfhead; |
---|
| 873 | off = IE_RFRAME_STATUS(sc->rframes, i); |
---|
| 874 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 875 | status = sc->ie_bus_read16(sc, off); |
---|
| 876 | |
---|
| 877 | #if I82586_DEBUG |
---|
| 878 | if (sc->sc_debug & IED_RINT) |
---|
| 879 | printf("%s: rint: frame(%d) status 0x%x\n", |
---|
| 880 | sc->arpcom.ac_if.if_name, i, status); |
---|
| 881 | #endif |
---|
| 882 | if ((status & IE_FD_COMPLETE) == 0) { |
---|
| 883 | if ((status & IE_FD_OK) != 0) { |
---|
| 884 | printf("%s: rint: weird: ", |
---|
| 885 | sc->arpcom.ac_if.if_name); |
---|
| 886 | i82586_rx_errors(sc, i, status); |
---|
| 887 | #if I82586_DEBUG |
---|
| 888 | I82586_TRACE(sc, I82586_RX_ERR, status); |
---|
| 889 | #endif |
---|
| 890 | break; |
---|
| 891 | } |
---|
| 892 | if (--timesthru == 0) { |
---|
| 893 | /* Account the accumulated errors */ |
---|
| 894 | i82586_count_errors(sc); |
---|
| 895 | timesthru = 1024; |
---|
| 896 | } |
---|
| 897 | break; |
---|
| 898 | } else if ((status & IE_FD_OK) == 0) { |
---|
| 899 | /* |
---|
| 900 | * If the chip is configured to automatically |
---|
| 901 | * discard bad frames, the only reason we can |
---|
| 902 | * get here is an "out-of-resource" condition. |
---|
| 903 | */ |
---|
| 904 | i82586_rx_errors(sc, i, status); |
---|
| 905 | drop = 1; |
---|
| 906 | |
---|
| 907 | #if I82586_DEBUG |
---|
| 908 | I82586_TRACE(sc, I82586_RX_DROP, status); |
---|
| 909 | #endif |
---|
| 910 | } |
---|
| 911 | |
---|
| 912 | #if I82586_DEBUG |
---|
| 913 | if ((status & IE_FD_BUSY) != 0) |
---|
| 914 | printf("%s: rint: frame(%d) busy; status=0x%x\n", |
---|
| 915 | sc->arpcom.ac_if.if_name, i, status); |
---|
| 916 | #endif |
---|
| 917 | |
---|
| 918 | /* |
---|
| 919 | * Advance the RFD list, since we're done with |
---|
| 920 | * this descriptor. |
---|
| 921 | */ |
---|
| 922 | |
---|
| 923 | /* Clear frame status */ |
---|
| 924 | sc->ie_bus_write16(sc, off, 0); |
---|
| 925 | |
---|
| 926 | /* Put fence at this frame (the head) */ |
---|
| 927 | off = IE_RFRAME_LAST(sc->rframes, i); |
---|
| 928 | sc->ie_bus_write16(sc, off, IE_FD_EOL|IE_FD_SUSP); |
---|
| 929 | |
---|
| 930 | /* and clear RBD field */ |
---|
| 931 | off = IE_RFRAME_BUFDESC(sc->rframes, i); |
---|
| 932 | sc->ie_bus_write16(sc, off, 0xffff); |
---|
| 933 | |
---|
| 934 | /* Remove fence from current tail */ |
---|
| 935 | off = IE_RFRAME_LAST(sc->rframes, sc->rftail); |
---|
| 936 | sc->ie_bus_write16(sc, off, 0); |
---|
| 937 | |
---|
| 938 | if (++sc->rftail == sc->nframes) |
---|
| 939 | sc->rftail = 0; |
---|
| 940 | if (++sc->rfhead == sc->nframes) |
---|
| 941 | sc->rfhead = 0; |
---|
| 942 | |
---|
| 943 | /* Pull the frame off the board */ |
---|
| 944 | if (drop) { |
---|
| 945 | i82586_drop_frames(sc); |
---|
| 946 | if ((status & IE_FD_RNR) != 0) |
---|
| 947 | sc->rnr_expect = 1; |
---|
| 948 | sc->arpcom.ac_if.if_ierrors++; |
---|
| 949 | } else if (ie_readframe(sc, i) != 0) |
---|
| 950 | return (1); |
---|
| 951 | } |
---|
| 952 | |
---|
| 953 | if ((scbstatus & IE_ST_RNR) != 0) { |
---|
| 954 | |
---|
| 955 | /* |
---|
| 956 | * Receiver went "Not Ready". We try to figure out |
---|
| 957 | * whether this was an expected event based on past |
---|
| 958 | * frame status values. |
---|
| 959 | */ |
---|
| 960 | |
---|
| 961 | if ((scbstatus & IE_RUS_SUSPEND) != 0) { |
---|
| 962 | /* |
---|
| 963 | * We use the "suspend on last frame" flag. |
---|
| 964 | * Send a RU RESUME command in response, since |
---|
| 965 | * we should have dealt with all completed frames |
---|
| 966 | * by now. |
---|
| 967 | */ |
---|
| 968 | printf("RINT: SUSPENDED; scbstatus=0x%x\n", |
---|
| 969 | scbstatus); |
---|
| 970 | if (i82586_start_cmd(sc, IE_RUC_RESUME, 0, 0, 0) == 0) |
---|
| 971 | return (0); |
---|
| 972 | printf("%s: RU RESUME command timed out\n", |
---|
| 973 | sc->arpcom.ac_if.if_name); |
---|
| 974 | return (1); /* Ask for a reset */ |
---|
| 975 | } |
---|
| 976 | |
---|
| 977 | if (sc->rnr_expect != 0) { |
---|
| 978 | /* |
---|
| 979 | * The RNR condition was announced in the previously |
---|
| 980 | * completed frame. Assume the receive ring is Ok, |
---|
| 981 | * so restart the receiver without further delay. |
---|
| 982 | */ |
---|
| 983 | i82586_start_transceiver(sc); |
---|
| 984 | sc->rnr_expect = 0; |
---|
| 985 | return (0); |
---|
| 986 | |
---|
| 987 | } else if ((scbstatus & IE_RUS_NOSPACE) != 0) { |
---|
| 988 | /* |
---|
| 989 | * We saw no previous IF_FD_RNR flag. |
---|
| 990 | * We check our ring invariants and, if ok, |
---|
| 991 | * just restart the receiver at the current |
---|
| 992 | * point in the ring. |
---|
| 993 | */ |
---|
| 994 | if (i82586_chk_rx_ring(sc) != 0) |
---|
| 995 | return (1); |
---|
| 996 | |
---|
| 997 | i82586_start_transceiver(sc); |
---|
| 998 | sc->arpcom.ac_if.if_ierrors++; |
---|
| 999 | return (0); |
---|
| 1000 | } else |
---|
| 1001 | printf("%s: receiver not ready; scbstatus=0x%x\n", |
---|
| 1002 | sc->arpcom.ac_if.if_name, scbstatus); |
---|
| 1003 | |
---|
| 1004 | sc->arpcom.ac_if.if_ierrors++; |
---|
| 1005 | return (1); /* Ask for a reset */ |
---|
| 1006 | } |
---|
| 1007 | |
---|
| 1008 | return (0); |
---|
| 1009 | } |
---|
| 1010 | |
---|
| 1011 | /* |
---|
| 1012 | * Process a command-complete interrupt. These are only generated by the |
---|
| 1013 | * transmission of frames. This routine is deceptively simple, since most |
---|
| 1014 | * of the real work is done by i82586_start(). |
---|
| 1015 | */ |
---|
| 1016 | int |
---|
| 1017 | i82586_tint(struct ie_softc *sc, int scbstatus) |
---|
| 1018 | { |
---|
| 1019 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 1020 | int status; |
---|
| 1021 | |
---|
| 1022 | #if I82586_DEBUG |
---|
| 1023 | I82586_TRACE(sc, I82586_TX_INT, sc->xmit_busy); |
---|
| 1024 | #endif |
---|
| 1025 | |
---|
| 1026 | #if I82586_DEBUG |
---|
| 1027 | if (sc->xmit_busy <= 0) { |
---|
| 1028 | printf("i82586_tint: (%d), WEIRD: xmit_busy=%d, xctail=%d, xchead=%d\n", |
---|
| 1029 | sc->trace_flow_in / 2, sc->xmit_busy, sc->xctail, sc->xchead); |
---|
| 1030 | I82586_TRACE(sc, I82586_TX_BAD, sc->xctail); |
---|
| 1031 | return (0); |
---|
| 1032 | } |
---|
| 1033 | #endif |
---|
| 1034 | |
---|
| 1035 | ifp->if_timer = 0; |
---|
| 1036 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
| 1037 | |
---|
| 1038 | status = sc->ie_bus_read16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, |
---|
| 1039 | sc->xctail)); |
---|
| 1040 | |
---|
| 1041 | #if I82586_DEBUG |
---|
| 1042 | if (sc->sc_debug & IED_TINT) |
---|
| 1043 | printf("%s: tint: SCB status 0x%x; xmit status 0x%x\n", |
---|
| 1044 | sc->arpcom.ac_if.if_name, scbstatus, status); |
---|
| 1045 | #endif |
---|
| 1046 | |
---|
| 1047 | if ((status & IE_STAT_COMPL) == 0 || (status & IE_STAT_BUSY)) { |
---|
| 1048 | printf("i82586_tint: (%d) command still busy; status=0x%x; tail=%d\n", |
---|
| 1049 | sc->trace_flow_in / 2, status, sc->xctail); |
---|
| 1050 | printf("iestatus = 0x%x\n", scbstatus); |
---|
| 1051 | // sc->sc_debug = IED_ALL; |
---|
| 1052 | } |
---|
| 1053 | |
---|
| 1054 | if (status & IE_STAT_OK) { |
---|
| 1055 | ifp->if_opackets++; |
---|
| 1056 | ifp->if_collisions += (status & IE_XS_MAXCOLL); |
---|
| 1057 | } else { |
---|
| 1058 | ifp->if_oerrors++; |
---|
| 1059 | /* |
---|
| 1060 | * Check SQE and DEFERRED? |
---|
| 1061 | * What if more than one bit is set? |
---|
| 1062 | */ |
---|
| 1063 | if (status & IE_STAT_ABORT) |
---|
| 1064 | printf("%s: send aborted\n", sc->arpcom.ac_if.if_name); |
---|
| 1065 | else if (status & IE_XS_NOCARRIER) |
---|
| 1066 | printf("%s: no carrier\n", sc->arpcom.ac_if.if_name); |
---|
| 1067 | else if (status & IE_XS_LOSTCTS) |
---|
| 1068 | printf("%s: lost CTS\n", sc->arpcom.ac_if.if_name); |
---|
| 1069 | else if (status & IE_XS_UNDERRUN) |
---|
| 1070 | printf("%s: DMA underrun\n", sc->arpcom.ac_if.if_name); |
---|
| 1071 | else if (status & IE_XS_EXCMAX) { |
---|
| 1072 | printf("%s: too many collisions\n", |
---|
| 1073 | sc->arpcom.ac_if.if_name); |
---|
| 1074 | sc->arpcom.ac_if.if_collisions += 16; |
---|
| 1075 | } |
---|
| 1076 | } |
---|
| 1077 | |
---|
| 1078 | /* |
---|
| 1079 | * If multicast addresses were added or deleted while transmitting, |
---|
| 1080 | * ie_mc_reset() set the want_mcsetup flag indicating that we |
---|
| 1081 | * should do it. |
---|
| 1082 | */ |
---|
| 1083 | if (sc->want_mcsetup) { |
---|
| 1084 | ie_mc_setup(sc, IE_XBUF_ADDR(sc, sc->xctail)); |
---|
| 1085 | sc->want_mcsetup = 0; |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | /* Done with the buffer. */ |
---|
| 1089 | sc->xmit_busy--; |
---|
| 1090 | sc->xctail = (sc->xctail + 1) % NTXBUF; |
---|
| 1091 | |
---|
| 1092 | /* Start the next packet, if any, transmitting. */ |
---|
| 1093 | if (sc->xmit_busy > 0) |
---|
| 1094 | iexmit(sc); |
---|
| 1095 | |
---|
| 1096 | i82586_start_tx(sc); |
---|
| 1097 | return (0); |
---|
| 1098 | } |
---|
| 1099 | |
---|
| 1100 | /* |
---|
| 1101 | * Get a range of receive buffer descriptors that represent one packet. |
---|
| 1102 | */ |
---|
| 1103 | static int |
---|
| 1104 | i82586_get_rbd_list(struct ie_softc *sc, u_int16_t *start, u_int16_t *end, int *pktlen) |
---|
| 1105 | { |
---|
| 1106 | int off, rbbase = sc->rbds; |
---|
| 1107 | int rbindex, count = 0; |
---|
| 1108 | int plen = 0; |
---|
| 1109 | int rbdstatus; |
---|
| 1110 | |
---|
| 1111 | *start = rbindex = sc->rbhead; |
---|
| 1112 | |
---|
| 1113 | do { |
---|
| 1114 | off = IE_RBD_STATUS(rbbase, rbindex); |
---|
| 1115 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 1116 | rbdstatus = sc->ie_bus_read16(sc, off); |
---|
| 1117 | if ((rbdstatus & IE_RBD_USED) == 0) { |
---|
| 1118 | /* |
---|
| 1119 | * This means we are somehow out of sync. So, we |
---|
| 1120 | * reset the adapter. |
---|
| 1121 | */ |
---|
| 1122 | #if I82586_DEBUG |
---|
| 1123 | print_rbd(sc, rbindex); |
---|
| 1124 | #endif |
---|
| 1125 | printf("%s: receive descriptors out of sync at %d\n", |
---|
| 1126 | sc->arpcom.ac_if.if_name, rbindex); |
---|
| 1127 | return (0); |
---|
| 1128 | } |
---|
| 1129 | plen += (rbdstatus & IE_RBD_CNTMASK); |
---|
| 1130 | |
---|
| 1131 | if (++rbindex == sc->nrxbuf) |
---|
| 1132 | rbindex = 0; |
---|
| 1133 | |
---|
| 1134 | ++count; |
---|
| 1135 | } while ((rbdstatus & IE_RBD_LAST) == 0); |
---|
| 1136 | *end = rbindex; |
---|
| 1137 | *pktlen = plen; |
---|
| 1138 | return (count); |
---|
| 1139 | } |
---|
| 1140 | |
---|
| 1141 | |
---|
| 1142 | /* |
---|
| 1143 | * Release a range of receive buffer descriptors after we've copied the packet. |
---|
| 1144 | */ |
---|
| 1145 | static void |
---|
| 1146 | i82586_release_rbd_list(struct ie_softc *sc, u_int16_t start, u_int16_t end) |
---|
| 1147 | { |
---|
| 1148 | int off, rbbase = sc->rbds; |
---|
| 1149 | int rbindex = start; |
---|
| 1150 | |
---|
| 1151 | do { |
---|
| 1152 | /* Clear buffer status */ |
---|
| 1153 | off = IE_RBD_STATUS(rbbase, rbindex); |
---|
| 1154 | sc->ie_bus_write16(sc, off, 0); |
---|
| 1155 | if (++rbindex == sc->nrxbuf) |
---|
| 1156 | rbindex = 0; |
---|
| 1157 | } while (rbindex != end); |
---|
| 1158 | |
---|
| 1159 | /* Mark EOL at new tail */ |
---|
| 1160 | rbindex = ((rbindex == 0) ? sc->nrxbuf : rbindex) - 1; |
---|
| 1161 | off = IE_RBD_BUFLEN(rbbase, rbindex); |
---|
| 1162 | sc->ie_bus_write16(sc, off, IE_RBUF_SIZE|IE_RBD_EOL); |
---|
| 1163 | |
---|
| 1164 | /* Remove EOL from current tail */ |
---|
| 1165 | off = IE_RBD_BUFLEN(rbbase, sc->rbtail); |
---|
| 1166 | sc->ie_bus_write16(sc, off, IE_RBUF_SIZE); |
---|
| 1167 | |
---|
| 1168 | /* New head & tail pointer */ |
---|
| 1169 | /* hmm, why have both? head is always (tail + 1) % NRXBUF */ |
---|
| 1170 | sc->rbhead = end; |
---|
| 1171 | sc->rbtail = rbindex; |
---|
| 1172 | } |
---|
| 1173 | |
---|
| 1174 | /* |
---|
| 1175 | * Drop the packet at the head of the RX buffer ring. |
---|
| 1176 | * Called if the frame descriptor reports an error on this packet. |
---|
| 1177 | * Returns 1 if the buffer descriptor ring appears to be corrupt; |
---|
| 1178 | * and 0 otherwise. |
---|
| 1179 | */ |
---|
| 1180 | static int |
---|
| 1181 | i82586_drop_frames(struct ie_softc *sc) |
---|
| 1182 | { |
---|
| 1183 | u_int16_t bstart, bend; |
---|
| 1184 | int pktlen; |
---|
| 1185 | |
---|
| 1186 | if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) |
---|
| 1187 | return (1); |
---|
| 1188 | i82586_release_rbd_list(sc, bstart, bend); |
---|
| 1189 | return (0); |
---|
| 1190 | } |
---|
| 1191 | |
---|
| 1192 | /* |
---|
| 1193 | * Check the RX frame & buffer descriptor lists for our invariants, |
---|
| 1194 | * i.e.: EOL bit set iff. it is pointed at by the r*tail pointer. |
---|
| 1195 | * |
---|
| 1196 | * Called when the receive unit has stopped unexpectedly. |
---|
| 1197 | * Returns 1 if an inconsistency is detected; 0 otherwise. |
---|
| 1198 | * |
---|
| 1199 | * The Receive Unit is expected to be NOT RUNNING. |
---|
| 1200 | */ |
---|
| 1201 | static int |
---|
| 1202 | i82586_chk_rx_ring(struct ie_softc *sc) |
---|
| 1203 | { |
---|
| 1204 | int n, off, val; |
---|
| 1205 | |
---|
| 1206 | for (n = 0; n < sc->nrxbuf; n++) { |
---|
| 1207 | off = IE_RBD_BUFLEN(sc->rbds, n); |
---|
| 1208 | val = sc->ie_bus_read16(sc, off); |
---|
| 1209 | if ((n == sc->rbtail) ^ ((val & IE_RBD_EOL) != 0)) { |
---|
| 1210 | /* `rbtail' and EOL flag out of sync */ |
---|
| 1211 | printf("%s: rx buffer descriptors out of sync at %d\n", |
---|
| 1212 | sc->arpcom.ac_if.if_name, n); |
---|
| 1213 | return (1); |
---|
| 1214 | } |
---|
| 1215 | |
---|
| 1216 | /* Take the opportunity to clear the status fields here ? */ |
---|
| 1217 | } |
---|
| 1218 | |
---|
| 1219 | for (n = 0; n < sc->nframes; n++) { |
---|
| 1220 | off = IE_RFRAME_LAST(sc->rframes, n); |
---|
| 1221 | val = sc->ie_bus_read16(sc, off); |
---|
| 1222 | if ((n == sc->rftail) ^ ((val & (IE_FD_EOL|IE_FD_SUSP)) != 0)) { |
---|
| 1223 | /* `rftail' and EOL flag out of sync */ |
---|
| 1224 | printf("%s: rx frame list out of sync at %d\n", |
---|
| 1225 | sc->arpcom.ac_if.if_name, n); |
---|
| 1226 | return (1); |
---|
| 1227 | } |
---|
| 1228 | } |
---|
| 1229 | |
---|
| 1230 | return (0); |
---|
| 1231 | } |
---|
| 1232 | |
---|
| 1233 | |
---|
| 1234 | /* |
---|
| 1235 | * Read frame NUM from unit UNIT (pre-cached as IE). |
---|
| 1236 | * |
---|
| 1237 | * This routine reads the RFD at NUM, and copies in the buffers from the list |
---|
| 1238 | * of RBD, then rotates the RBD list so that the receiver doesn't start |
---|
| 1239 | * complaining. Trailers are DROPPED---there's no point in wasting time |
---|
| 1240 | * on confusing code to deal with them. Hopefully, this machine will |
---|
| 1241 | * never ARP for trailers anyway. |
---|
| 1242 | */ |
---|
| 1243 | static int |
---|
| 1244 | ie_readframe(struct ie_softc *sc, int num) /* frame number to read */ |
---|
| 1245 | { |
---|
| 1246 | struct ether_header *eh; |
---|
| 1247 | struct mbuf *m; |
---|
| 1248 | u_int16_t bstart, bend; |
---|
| 1249 | int pktlen; |
---|
| 1250 | |
---|
| 1251 | if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) { |
---|
| 1252 | sc->arpcom.ac_if.if_ierrors++; |
---|
| 1253 | return (1); |
---|
| 1254 | } |
---|
| 1255 | |
---|
| 1256 | m = ieget(sc, bstart, pktlen); |
---|
| 1257 | i82586_release_rbd_list(sc, bstart, bend); |
---|
| 1258 | |
---|
| 1259 | if (m == 0) { |
---|
| 1260 | sc->arpcom.ac_if.if_ierrors++; |
---|
| 1261 | return (0); |
---|
| 1262 | } |
---|
| 1263 | |
---|
| 1264 | eh = mtod(m, struct ether_header *); |
---|
| 1265 | m->m_data += sizeof (struct ether_header); |
---|
| 1266 | |
---|
| 1267 | #if I82586_DEBUG |
---|
| 1268 | if (sc->sc_debug & IED_READFRAME) { |
---|
| 1269 | |
---|
| 1270 | printf("%s: frame from ether %s type 0x%x len %d\n", |
---|
| 1271 | sc->arpcom.ac_if.if_name, |
---|
| 1272 | ether_sprintf(eh->ether_shost), |
---|
| 1273 | (u_int)ntohs(eh->ether_type), |
---|
| 1274 | pktlen); |
---|
| 1275 | } |
---|
| 1276 | #endif |
---|
| 1277 | |
---|
| 1278 | #if NBPFILTER > 0 |
---|
| 1279 | /* Check for a BPF filter; if so, hand it up. */ |
---|
| 1280 | if (sc->arpcom.ac_if.if_bpf != 0) |
---|
| 1281 | /* Pass it up. */ |
---|
| 1282 | bpf_mtap(sc->arpcom.ac_if.if_bpf, m); |
---|
| 1283 | #endif /* NBPFILTER > 0 */ |
---|
| 1284 | |
---|
| 1285 | /* |
---|
| 1286 | * Finally pass this packet up to higher layers. |
---|
| 1287 | */ |
---|
| 1288 | ether_input (&sc->arpcom.ac_if, eh, m); |
---|
| 1289 | sc->arpcom.ac_if.if_ipackets++; |
---|
| 1290 | |
---|
| 1291 | #if I82586_DEBUG |
---|
| 1292 | I82586_TRACE(sc, I82586_RX_OK, sc->arpcom.ac_if.if_ipackets); |
---|
| 1293 | #endif |
---|
| 1294 | |
---|
| 1295 | return (0); |
---|
| 1296 | } |
---|
| 1297 | |
---|
| 1298 | /* |
---|
| 1299 | * Start transmission on an interface. |
---|
| 1300 | */ |
---|
| 1301 | void |
---|
| 1302 | i82586_start(struct ifnet *ifp) |
---|
| 1303 | { |
---|
| 1304 | struct ie_softc *sc = ifp->if_softc; |
---|
| 1305 | |
---|
| 1306 | if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) |
---|
| 1307 | return; |
---|
| 1308 | |
---|
| 1309 | #if I82586_DEBUG |
---|
| 1310 | I82586_TRACE(sc, I82586_TX_REQ, sc->xmit_busy); |
---|
| 1311 | #endif |
---|
| 1312 | |
---|
| 1313 | rtems_event_send (sc->tx_task, i82586_TX_EVENT); |
---|
| 1314 | } |
---|
| 1315 | |
---|
| 1316 | static void |
---|
| 1317 | i82586_tx_task(void *arg) |
---|
| 1318 | { |
---|
| 1319 | struct ie_softc *sc = arg; |
---|
| 1320 | rtems_event_set events; |
---|
| 1321 | |
---|
| 1322 | for (;;) { |
---|
| 1323 | rtems_bsdnet_event_receive (i82586_TX_EVENT, |
---|
| 1324 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
| 1325 | 0, &events); |
---|
| 1326 | |
---|
| 1327 | #if I82586_DEBUG |
---|
| 1328 | I82586_TRACE(sc, I82586_TX_EVT, sc->xmit_busy); |
---|
| 1329 | |
---|
| 1330 | if (sc->sc_debug) |
---|
| 1331 | printf ("%s: =======\n", sc->arpcom.ac_if.if_name); |
---|
| 1332 | #endif |
---|
| 1333 | |
---|
| 1334 | i82586_start_tx(sc); |
---|
| 1335 | } |
---|
| 1336 | } |
---|
| 1337 | |
---|
| 1338 | static void |
---|
| 1339 | i82586_start_tx(struct ie_softc *sc) |
---|
| 1340 | { |
---|
| 1341 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 1342 | struct mbuf *m0, *m; |
---|
| 1343 | int buffer, head, xbase; |
---|
| 1344 | u_short len; |
---|
| 1345 | int s; |
---|
| 1346 | |
---|
| 1347 | #if I82586_DEBUG |
---|
| 1348 | I82586_TRACE(sc, I82586_START_TX, sc->xmit_busy); |
---|
| 1349 | #endif |
---|
| 1350 | |
---|
| 1351 | if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) |
---|
| 1352 | { |
---|
| 1353 | #if I82586_DEBUG |
---|
| 1354 | I82586_TRACE(sc, I82586_TX_ACTIVE, ifp->if_snd.ifq_len); |
---|
| 1355 | #endif |
---|
| 1356 | return; |
---|
| 1357 | } |
---|
| 1358 | |
---|
| 1359 | for (;;) { |
---|
| 1360 | if (sc->xmit_busy == NTXBUF) { |
---|
| 1361 | ifp->if_flags |= IFF_OACTIVE; |
---|
| 1362 | break; |
---|
| 1363 | } |
---|
| 1364 | |
---|
| 1365 | head = sc->xchead; |
---|
| 1366 | xbase = sc->xbds; |
---|
| 1367 | |
---|
| 1368 | IF_DEQUEUE(&ifp->if_snd, m0); |
---|
| 1369 | if (m0 == 0) |
---|
| 1370 | break; |
---|
| 1371 | |
---|
| 1372 | /* We need to use m->m_pkthdr.len, so require the header */ |
---|
| 1373 | if ((m0->m_flags & M_PKTHDR) == 0) |
---|
| 1374 | panic("i82586_start: no header mbuf"); |
---|
| 1375 | |
---|
| 1376 | #if NBPFILTER > 0 |
---|
| 1377 | /* Tap off here if there is a BPF listener. */ |
---|
| 1378 | if (ifp->if_bpf) |
---|
| 1379 | bpf_mtap(ifp->if_bpf, m0); |
---|
| 1380 | #endif |
---|
| 1381 | |
---|
| 1382 | #if I82586_DEBUG |
---|
| 1383 | if (sc->sc_debug & IED_ENQ) |
---|
| 1384 | printf("%s: fill buffer %d\n", sc->arpcom.ac_if.if_name, |
---|
| 1385 | sc->xchead); |
---|
| 1386 | #endif |
---|
| 1387 | |
---|
| 1388 | if (m0->m_pkthdr.len > IE_TBUF_SIZE) |
---|
| 1389 | printf("%s: tbuf overflow\n", sc->arpcom.ac_if.if_name); |
---|
| 1390 | |
---|
| 1391 | buffer = IE_XBUF_ADDR(sc, head); |
---|
| 1392 | for (m = m0; m != 0; m = m->m_next) { |
---|
| 1393 | (sc->memcopyout)(sc, mtod(m,caddr_t), buffer, m->m_len); |
---|
| 1394 | buffer += m->m_len; |
---|
| 1395 | } |
---|
| 1396 | |
---|
| 1397 | len = max(m0->m_pkthdr.len, ETHER_MIN_LEN); |
---|
| 1398 | m_freem(m0); |
---|
| 1399 | |
---|
| 1400 | /* |
---|
| 1401 | * Setup the transmit buffer descriptor here, while we |
---|
| 1402 | * know the packet's length. |
---|
| 1403 | */ |
---|
| 1404 | sc->ie_bus_write16(sc, IE_XBD_FLAGS(xbase, head), |
---|
| 1405 | len | IE_TBD_EOL); |
---|
| 1406 | sc->ie_bus_write16(sc, IE_XBD_NEXT(xbase, head), 0xffff); |
---|
| 1407 | sc->ie_bus_write24(sc, IE_XBD_BUF(xbase, head), |
---|
| 1408 | IE_XBUF_ADDR(sc, head)); |
---|
| 1409 | |
---|
| 1410 | if (++head == NTXBUF) |
---|
| 1411 | head = 0; |
---|
| 1412 | sc->xchead = head; |
---|
| 1413 | |
---|
| 1414 | #if I82586_DEBUG |
---|
| 1415 | I82586_TRACE(sc, I82586_TX_START, sc->xmit_busy); |
---|
| 1416 | #endif |
---|
| 1417 | |
---|
| 1418 | s = splnet(); |
---|
| 1419 | /* Start the first packet transmitting. */ |
---|
| 1420 | if (sc->xmit_busy == 0) |
---|
| 1421 | iexmit(sc); |
---|
| 1422 | |
---|
| 1423 | sc->xmit_busy++; |
---|
| 1424 | |
---|
| 1425 | splx(s); |
---|
| 1426 | } |
---|
| 1427 | } |
---|
| 1428 | |
---|
| 1429 | /* |
---|
| 1430 | * Probe IE's ram setup [ Move all this into MD front-end!? ] |
---|
| 1431 | * Use only if SCP and ISCP represent offsets into shared ram space. |
---|
| 1432 | */ |
---|
| 1433 | int |
---|
| 1434 | i82586_proberam(struct ie_softc *sc) |
---|
| 1435 | { |
---|
| 1436 | int result, off; |
---|
| 1437 | |
---|
| 1438 | /* Put in 16-bit mode */ |
---|
| 1439 | off = IE_SCP_BUS_USE(sc->scp); |
---|
| 1440 | sc->ie_bus_write16(sc, off, 0); |
---|
| 1441 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); |
---|
| 1442 | |
---|
| 1443 | /* Set the ISCP `busy' bit */ |
---|
| 1444 | off = IE_ISCP_BUSY(sc->iscp); |
---|
| 1445 | sc->ie_bus_write16(sc, off, 1); |
---|
| 1446 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); |
---|
| 1447 | |
---|
| 1448 | if (sc->hwreset) |
---|
| 1449 | (sc->hwreset)(sc, CHIP_PROBE); |
---|
| 1450 | |
---|
| 1451 | (sc->chan_attn) (sc, CHIP_PROBE); |
---|
| 1452 | |
---|
| 1453 | delay(100); /* wait a while... */ |
---|
| 1454 | |
---|
| 1455 | /* Read back the ISCP `busy' bit; it should be clear by now */ |
---|
| 1456 | off = IE_ISCP_BUSY(sc->iscp); |
---|
| 1457 | IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); |
---|
| 1458 | result = sc->ie_bus_read16(sc, off) == 0; |
---|
| 1459 | |
---|
| 1460 | /* Acknowledge any interrupts we may have caused. */ |
---|
| 1461 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1462 | |
---|
| 1463 | return (result); |
---|
| 1464 | } |
---|
| 1465 | |
---|
| 1466 | void |
---|
| 1467 | i82586_reset(struct ie_softc *sc, int hard) |
---|
| 1468 | { |
---|
| 1469 | int s = splnet(); |
---|
| 1470 | |
---|
| 1471 | if (hard) |
---|
| 1472 | printf("%s: reset\n", sc->arpcom.ac_if.if_name); |
---|
| 1473 | |
---|
| 1474 | /* Clear OACTIVE in case we're called from watchdog (frozen xmit). */ |
---|
| 1475 | sc->arpcom.ac_if.if_timer = 0; |
---|
| 1476 | sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; |
---|
| 1477 | |
---|
| 1478 | /* |
---|
| 1479 | * Stop i82586 dead in its tracks. |
---|
| 1480 | */ |
---|
| 1481 | if (i82586_start_cmd(sc, IE_RUC_ABORT | IE_CUC_ABORT, 0, 0, 0)) |
---|
| 1482 | printf("%s: abort commands timed out\n", sc->arpcom.ac_if.if_name); |
---|
| 1483 | |
---|
| 1484 | /* |
---|
| 1485 | * This can really slow down the i82586_reset() on some cards, but it's |
---|
| 1486 | * necessary to unwedge other ones (eg, the Sun VME ones) from certain |
---|
| 1487 | * lockups. |
---|
| 1488 | */ |
---|
| 1489 | if (hard && sc->hwreset) |
---|
| 1490 | (sc->hwreset)(sc, CARD_RESET); |
---|
| 1491 | |
---|
| 1492 | delay(100); |
---|
| 1493 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1494 | |
---|
| 1495 | if ((sc->arpcom.ac_if.if_flags & IFF_UP) != 0) { |
---|
| 1496 | i82586_init(&sc->arpcom.ac_if); |
---|
| 1497 | } |
---|
| 1498 | |
---|
| 1499 | splx(s); |
---|
| 1500 | } |
---|
| 1501 | |
---|
| 1502 | static void |
---|
| 1503 | setup_simple_command(struct ie_softc *sc, int cmd, int cmdbuf) |
---|
| 1504 | { |
---|
| 1505 | /* Setup a simple command */ |
---|
| 1506 | sc->ie_bus_write16(sc, IE_CMD_COMMON_STATUS(cmdbuf), 0); |
---|
| 1507 | sc->ie_bus_write16(sc, IE_CMD_COMMON_CMD(cmdbuf), cmd | IE_CMD_LAST); |
---|
| 1508 | sc->ie_bus_write16(sc, IE_CMD_COMMON_LINK(cmdbuf), 0xffff); |
---|
| 1509 | |
---|
| 1510 | /* Assign the command buffer to the SCB command list */ |
---|
| 1511 | sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), cmdbuf); |
---|
| 1512 | } |
---|
| 1513 | |
---|
| 1514 | /* |
---|
| 1515 | * Run the time-domain reflectometer. |
---|
| 1516 | */ |
---|
| 1517 | static void |
---|
| 1518 | ie_run_tdr(struct ie_softc *sc, int cmd) |
---|
| 1519 | { |
---|
| 1520 | int result; |
---|
| 1521 | |
---|
| 1522 | setup_simple_command(sc, IE_CMD_TDR, cmd); |
---|
| 1523 | sc->ie_bus_write16(sc, IE_CMD_TDR_TIME(cmd), 0); |
---|
| 1524 | |
---|
| 1525 | if (i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0) || |
---|
| 1526 | (sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)) & IE_STAT_OK) == 0) |
---|
| 1527 | result = 0x10000; /* XXX */ |
---|
| 1528 | else |
---|
| 1529 | result = sc->ie_bus_read16(sc, IE_CMD_TDR_TIME(cmd)); |
---|
| 1530 | |
---|
| 1531 | /* Squash any pending interrupts */ |
---|
| 1532 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1533 | |
---|
| 1534 | if (result & IE_TDR_SUCCESS) |
---|
| 1535 | return; |
---|
| 1536 | |
---|
| 1537 | if (result & 0x10000) |
---|
| 1538 | printf("%s: TDR command failed\n", sc->arpcom.ac_if.if_name); |
---|
| 1539 | else if (result & IE_TDR_XCVR) |
---|
| 1540 | printf("%s: transceiver problem\n", sc->arpcom.ac_if.if_name); |
---|
| 1541 | else if (result & IE_TDR_OPEN) |
---|
| 1542 | printf("%s: TDR detected incorrect termination %d clocks away\n", |
---|
| 1543 | sc->arpcom.ac_if.if_name, result & IE_TDR_TIME); |
---|
| 1544 | else if (result & IE_TDR_SHORT) |
---|
| 1545 | printf("%s: TDR detected a short circuit %d clocks away\n", |
---|
| 1546 | sc->arpcom.ac_if.if_name, result & IE_TDR_TIME); |
---|
| 1547 | else |
---|
| 1548 | printf("%s: TDR returned unknown status 0x%x\n", |
---|
| 1549 | sc->arpcom.ac_if.if_name, result); |
---|
| 1550 | } |
---|
| 1551 | |
---|
| 1552 | |
---|
| 1553 | /* |
---|
| 1554 | * i82586_setup_bufs: set up the buffers |
---|
| 1555 | * |
---|
| 1556 | * We have a block of KVA at sc->buf_area which is of size sc->buf_area_sz. |
---|
| 1557 | * this is to be used for the buffers. The chip indexs its control data |
---|
| 1558 | * structures with 16 bit offsets, and it indexes actual buffers with |
---|
| 1559 | * 24 bit addresses. So we should allocate control buffers first so that |
---|
| 1560 | * we don't overflow the 16 bit offset field. The number of transmit |
---|
| 1561 | * buffers is fixed at compile time. |
---|
| 1562 | * |
---|
| 1563 | */ |
---|
| 1564 | static void |
---|
| 1565 | i82586_setup_bufs(struct ie_softc *sc) |
---|
| 1566 | { |
---|
| 1567 | int ptr = sc->buf_area; /* memory pool */ |
---|
| 1568 | int n, r; |
---|
| 1569 | |
---|
| 1570 | /* |
---|
| 1571 | * step 0: zero memory and figure out how many recv buffers and |
---|
| 1572 | * frames we can have. |
---|
| 1573 | */ |
---|
| 1574 | ptr = (ptr + 3) & ~3; /* set alignment and stick with it */ |
---|
| 1575 | |
---|
| 1576 | |
---|
| 1577 | /* |
---|
| 1578 | * step 1: lay out data structures in the shared-memory area |
---|
| 1579 | */ |
---|
| 1580 | |
---|
| 1581 | /* The no-op commands; used if "nop-chaining" is in effect */ |
---|
| 1582 | sc->nop_cmds = ptr; |
---|
| 1583 | ptr += NTXBUF * IE_CMD_NOP_SZ; |
---|
| 1584 | |
---|
| 1585 | /* The transmit commands */ |
---|
| 1586 | sc->xmit_cmds = ptr; |
---|
| 1587 | ptr += NTXBUF * IE_CMD_XMIT_SZ; |
---|
| 1588 | |
---|
| 1589 | /* The transmit buffers descriptors */ |
---|
| 1590 | sc->xbds = ptr; |
---|
| 1591 | ptr += NTXBUF * IE_XBD_SZ; |
---|
| 1592 | |
---|
| 1593 | /* The transmit buffers */ |
---|
| 1594 | sc->xbufs = ptr; |
---|
| 1595 | ptr += NTXBUF * IE_TBUF_SIZE; |
---|
| 1596 | |
---|
| 1597 | ptr = (ptr + 3) & ~3; /* re-align.. just in case */ |
---|
| 1598 | |
---|
| 1599 | /* Compute free space for RECV stuff */ |
---|
| 1600 | n = sc->buf_area_sz - (ptr - sc->buf_area); |
---|
| 1601 | |
---|
| 1602 | /* Compute size of one RECV frame */ |
---|
| 1603 | r = IE_RFRAME_SZ + ((IE_RBD_SZ + IE_RBUF_SIZE) * B_PER_F); |
---|
| 1604 | |
---|
| 1605 | sc->nframes = n / r; |
---|
| 1606 | |
---|
| 1607 | if (sc->nframes <= 0) |
---|
| 1608 | panic("ie: bogus buffer calc\n"); |
---|
| 1609 | |
---|
| 1610 | sc->nrxbuf = sc->nframes * B_PER_F; |
---|
| 1611 | |
---|
| 1612 | /* The receice frame descriptors */ |
---|
| 1613 | sc->rframes = ptr; |
---|
| 1614 | ptr += sc->nframes * IE_RFRAME_SZ; |
---|
| 1615 | |
---|
| 1616 | /* The receive buffer descriptors */ |
---|
| 1617 | sc->rbds = ptr; |
---|
| 1618 | ptr += sc->nrxbuf * IE_RBD_SZ; |
---|
| 1619 | |
---|
| 1620 | /* The receive buffers */ |
---|
| 1621 | sc->rbufs = ptr; |
---|
| 1622 | ptr += sc->nrxbuf * IE_RBUF_SIZE; |
---|
| 1623 | |
---|
| 1624 | #if I82586_DEBUG |
---|
| 1625 | printf("%s: %d frames %d bufs\n", sc->arpcom.ac_if.if_name, sc->nframes, |
---|
| 1626 | sc->nrxbuf); |
---|
| 1627 | #endif |
---|
| 1628 | |
---|
| 1629 | /* |
---|
| 1630 | * step 2: link together the recv frames and set EOL on last one |
---|
| 1631 | */ |
---|
| 1632 | for (n = 0; n < sc->nframes; n++) { |
---|
| 1633 | int m = (n == sc->nframes - 1) ? 0 : n + 1; |
---|
| 1634 | |
---|
| 1635 | /* Clear status */ |
---|
| 1636 | sc->ie_bus_write16(sc, IE_RFRAME_STATUS(sc->rframes,n), 0); |
---|
| 1637 | |
---|
| 1638 | /* RBD link = NULL */ |
---|
| 1639 | sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,n), |
---|
| 1640 | 0xffff); |
---|
| 1641 | |
---|
| 1642 | /* Make a circular list */ |
---|
| 1643 | sc->ie_bus_write16(sc, IE_RFRAME_NEXT(sc->rframes,n), |
---|
| 1644 | IE_RFRAME_ADDR(sc->rframes,m)); |
---|
| 1645 | |
---|
| 1646 | /* Mark last as EOL */ |
---|
| 1647 | sc->ie_bus_write16(sc, IE_RFRAME_LAST(sc->rframes,n), |
---|
| 1648 | ((m==0)? (IE_FD_EOL|IE_FD_SUSP) : 0)); |
---|
| 1649 | } |
---|
| 1650 | |
---|
| 1651 | /* |
---|
| 1652 | * step 3: link the RBDs and set EOL on last one |
---|
| 1653 | */ |
---|
| 1654 | for (n = 0; n < sc->nrxbuf; n++) { |
---|
| 1655 | int m = (n == sc->nrxbuf - 1) ? 0 : n + 1; |
---|
| 1656 | |
---|
| 1657 | /* Clear status */ |
---|
| 1658 | sc->ie_bus_write16(sc, IE_RBD_STATUS(sc->rbds,n), 0); |
---|
| 1659 | |
---|
| 1660 | /* Make a circular list */ |
---|
| 1661 | sc->ie_bus_write16(sc, IE_RBD_NEXT(sc->rbds,n), |
---|
| 1662 | IE_RBD_ADDR(sc->rbds,m)); |
---|
| 1663 | |
---|
| 1664 | /* Link to data buffers */ |
---|
| 1665 | sc->ie_bus_write24(sc, IE_RBD_BUFADDR(sc->rbds, n), |
---|
| 1666 | IE_RBUF_ADDR(sc, n)); |
---|
| 1667 | sc->ie_bus_write16(sc, IE_RBD_BUFLEN(sc->rbds,n), |
---|
| 1668 | IE_RBUF_SIZE | ((m==0)?IE_RBD_EOL:0)); |
---|
| 1669 | } |
---|
| 1670 | |
---|
| 1671 | /* |
---|
| 1672 | * step 4: all xmit no-op commands loopback onto themselves |
---|
| 1673 | */ |
---|
| 1674 | for (n = 0; n < NTXBUF; n++) { |
---|
| 1675 | sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, n), 0); |
---|
| 1676 | |
---|
| 1677 | sc->ie_bus_write16(sc, IE_CMD_NOP_CMD(sc->nop_cmds, n), |
---|
| 1678 | IE_CMD_NOP); |
---|
| 1679 | |
---|
| 1680 | sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, n), |
---|
| 1681 | IE_CMD_NOP_ADDR(sc->nop_cmds, n)); |
---|
| 1682 | } |
---|
| 1683 | |
---|
| 1684 | |
---|
| 1685 | /* |
---|
| 1686 | * step 6: set the head and tail pointers on receive to keep track of |
---|
| 1687 | * the order in which RFDs and RBDs are used. |
---|
| 1688 | */ |
---|
| 1689 | |
---|
| 1690 | /* Pointers to last packet sent and next available transmit buffer. */ |
---|
| 1691 | sc->xchead = sc->xctail = 0; |
---|
| 1692 | |
---|
| 1693 | /* Clear transmit-busy flag and set number of free transmit buffers. */ |
---|
| 1694 | sc->xmit_busy = 0; |
---|
| 1695 | |
---|
| 1696 | /* |
---|
| 1697 | * Pointers to first and last receive frame. |
---|
| 1698 | * The RFD pointed to by rftail is the only one that has EOL set. |
---|
| 1699 | */ |
---|
| 1700 | sc->rfhead = 0; |
---|
| 1701 | sc->rftail = sc->nframes - 1; |
---|
| 1702 | |
---|
| 1703 | /* |
---|
| 1704 | * Pointers to first and last receive descriptor buffer. |
---|
| 1705 | * The RBD pointed to by rbtail is the only one that has EOL set. |
---|
| 1706 | */ |
---|
| 1707 | sc->rbhead = 0; |
---|
| 1708 | sc->rbtail = sc->nrxbuf - 1; |
---|
| 1709 | |
---|
| 1710 | /* link in recv frames * and buffer into the scb. */ |
---|
| 1711 | #if I82586_DEBUG |
---|
| 1712 | printf("%s: reserved %d bytes\n", |
---|
| 1713 | sc->arpcom.ac_if.if_name, ptr - sc->buf_area); |
---|
| 1714 | #endif |
---|
| 1715 | } |
---|
| 1716 | |
---|
| 1717 | static int |
---|
| 1718 | ie_cfg_setup(struct ie_softc *sc, int cmd, int promiscuous, int manchester) |
---|
| 1719 | { |
---|
| 1720 | int cmdresult, status; |
---|
| 1721 | u_int8_t buf[IE_CMD_CFG_SZ]; /* XXX malloc? */ |
---|
| 1722 | |
---|
| 1723 | *IE_CMD_CFG_CNT(buf) = 0x0c; |
---|
| 1724 | *IE_CMD_CFG_FIFO(buf) = 8; |
---|
| 1725 | *IE_CMD_CFG_SAVEBAD(buf) = 0x40; |
---|
| 1726 | *IE_CMD_CFG_ADDRLEN(buf) = 0x2e; |
---|
| 1727 | *IE_CMD_CFG_PRIORITY(buf) = 0; |
---|
| 1728 | *IE_CMD_CFG_IFS(buf) = 0x60; |
---|
| 1729 | *IE_CMD_CFG_SLOT_LOW(buf) = 0; |
---|
| 1730 | *IE_CMD_CFG_SLOT_HIGH(buf) = 0xf2; |
---|
| 1731 | *IE_CMD_CFG_PROMISC(buf) = !!promiscuous | manchester << 2; |
---|
| 1732 | *IE_CMD_CFG_CRSCDT(buf) = 0; |
---|
| 1733 | *IE_CMD_CFG_MINLEN(buf) = 64; |
---|
| 1734 | *IE_CMD_CFG_JUNK(buf) = 0xff; |
---|
| 1735 | sc->memcopyout(sc, buf, cmd, IE_CMD_CFG_SZ); |
---|
| 1736 | setup_simple_command(sc, IE_CMD_CONFIG, cmd); |
---|
| 1737 | IE_BUS_BARRIER(sc, cmd, IE_CMD_CFG_SZ, BUS_SPACE_BARRIER_WRITE); |
---|
| 1738 | |
---|
| 1739 | cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0); |
---|
| 1740 | status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)); |
---|
| 1741 | if (cmdresult != 0) { |
---|
| 1742 | printf("%s: configure command timed out; status %x\n", |
---|
| 1743 | sc->arpcom.ac_if.if_name, status); |
---|
| 1744 | return (0); |
---|
| 1745 | } |
---|
| 1746 | if ((status & IE_STAT_OK) == 0) { |
---|
| 1747 | printf("%s: configure command failed; status %x\n", |
---|
| 1748 | sc->arpcom.ac_if.if_name, status); |
---|
| 1749 | return (0); |
---|
| 1750 | } |
---|
| 1751 | |
---|
| 1752 | /* Squash any pending interrupts */ |
---|
| 1753 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1754 | return (1); |
---|
| 1755 | } |
---|
| 1756 | |
---|
| 1757 | static int |
---|
| 1758 | ie_ia_setup(struct ie_softc *sc, int cmdbuf) |
---|
| 1759 | { |
---|
| 1760 | int cmdresult, status; |
---|
| 1761 | |
---|
| 1762 | setup_simple_command(sc, IE_CMD_IASETUP, cmdbuf); |
---|
| 1763 | |
---|
| 1764 | (sc->memcopyout)(sc, sc->arpcom.ac_enaddr, |
---|
| 1765 | IE_CMD_IAS_EADDR(cmdbuf), ETHER_ADDR_LEN); |
---|
| 1766 | |
---|
| 1767 | cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); |
---|
| 1768 | status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); |
---|
| 1769 | if (cmdresult != 0) { |
---|
| 1770 | printf("%s: individual address command timed out; status %x\n", |
---|
| 1771 | sc->arpcom.ac_if.if_name, status); |
---|
| 1772 | return (0); |
---|
| 1773 | } |
---|
| 1774 | if ((status & IE_STAT_OK) == 0) { |
---|
| 1775 | printf("%s: individual address command failed; status %x\n", |
---|
| 1776 | sc->arpcom.ac_if.if_name, status); |
---|
| 1777 | return (0); |
---|
| 1778 | } |
---|
| 1779 | |
---|
| 1780 | /* Squash any pending interrupts */ |
---|
| 1781 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1782 | return (1); |
---|
| 1783 | } |
---|
| 1784 | |
---|
| 1785 | /* |
---|
| 1786 | * Run the multicast setup command. |
---|
| 1787 | * Called at splnet(). |
---|
| 1788 | */ |
---|
| 1789 | static int |
---|
| 1790 | ie_mc_setup(struct ie_softc *sc, int cmdbuf) |
---|
| 1791 | { |
---|
| 1792 | int cmdresult, status; |
---|
| 1793 | |
---|
| 1794 | if (sc->mcast_count == 0) |
---|
| 1795 | return (1); |
---|
| 1796 | |
---|
| 1797 | setup_simple_command(sc, IE_CMD_MCAST, cmdbuf); |
---|
| 1798 | |
---|
| 1799 | (sc->memcopyout)(sc, (caddr_t)sc->mcast_addrs, |
---|
| 1800 | IE_CMD_MCAST_MADDR(cmdbuf), |
---|
| 1801 | sc->mcast_count * ETHER_ADDR_LEN); |
---|
| 1802 | |
---|
| 1803 | sc->ie_bus_write16(sc, IE_CMD_MCAST_BYTES(cmdbuf), |
---|
| 1804 | sc->mcast_count * ETHER_ADDR_LEN); |
---|
| 1805 | |
---|
| 1806 | /* Start the command */ |
---|
| 1807 | cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); |
---|
| 1808 | status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); |
---|
| 1809 | if (cmdresult != 0) { |
---|
| 1810 | printf("%s: multicast setup command timed out; status %x\n", |
---|
| 1811 | sc->arpcom.ac_if.if_name, status); |
---|
| 1812 | return (0); |
---|
| 1813 | } |
---|
| 1814 | if ((status & IE_STAT_OK) == 0) { |
---|
| 1815 | printf("%s: multicast setup command failed; status %x\n", |
---|
| 1816 | sc->arpcom.ac_if.if_name, status); |
---|
| 1817 | return (0); |
---|
| 1818 | } |
---|
| 1819 | |
---|
| 1820 | /* Squash any pending interrupts */ |
---|
| 1821 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1822 | return (1); |
---|
| 1823 | } |
---|
| 1824 | |
---|
| 1825 | /* |
---|
| 1826 | * This routine takes the environment generated by check_ie_present() and adds |
---|
| 1827 | * to it all the other structures we need to operate the adapter. This |
---|
| 1828 | * includes executing the CONFIGURE, IA-SETUP, and MC-SETUP commands, starting |
---|
| 1829 | * the receiver unit, and clearing interrupts. |
---|
| 1830 | * |
---|
| 1831 | * THIS ROUTINE MUST BE CALLED AT splnet() OR HIGHER. |
---|
| 1832 | */ |
---|
| 1833 | void |
---|
| 1834 | i82586_init(void *arg) |
---|
| 1835 | { |
---|
| 1836 | struct ie_softc *sc = arg; |
---|
| 1837 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 1838 | int cmd; |
---|
| 1839 | |
---|
| 1840 | sc->async_cmd_inprogress = 0; |
---|
| 1841 | sc->xmit_busy = 0; |
---|
| 1842 | |
---|
| 1843 | #if I82586_DEBUG |
---|
| 1844 | memset(sc->trace_flow, 0, sizeof(sc->trace_flow)); |
---|
| 1845 | sc->trace_flow_wrap = 0; |
---|
| 1846 | #endif |
---|
| 1847 | sc->trace_flow_in = 0; |
---|
| 1848 | |
---|
| 1849 | cmd = sc->buf_area; |
---|
| 1850 | |
---|
| 1851 | #if I82586_DEBUG |
---|
| 1852 | printf ("%s: sc_debug at 0x%08x\n", sc->arpcom.ac_if.if_name, (unsigned int) &sc->sc_debug); |
---|
| 1853 | #endif |
---|
| 1854 | |
---|
| 1855 | /* |
---|
| 1856 | * Send the configure command first. |
---|
| 1857 | */ |
---|
| 1858 | if (ie_cfg_setup(sc, cmd, sc->promisc, 0) == 0) |
---|
| 1859 | return; |
---|
| 1860 | |
---|
| 1861 | /* |
---|
| 1862 | * Send the Individual Address Setup command. |
---|
| 1863 | */ |
---|
| 1864 | if (ie_ia_setup(sc, cmd) == 0) |
---|
| 1865 | return; |
---|
| 1866 | |
---|
| 1867 | /* |
---|
| 1868 | * Run the time-domain reflectometer. |
---|
| 1869 | */ |
---|
| 1870 | ie_run_tdr(sc, cmd); |
---|
| 1871 | |
---|
| 1872 | /* |
---|
| 1873 | * Set the multi-cast filter, if any |
---|
| 1874 | */ |
---|
| 1875 | if (ie_mc_setup(sc, cmd) == 0) |
---|
| 1876 | return; |
---|
| 1877 | |
---|
| 1878 | /* |
---|
| 1879 | * If no tasks exist, create them. Need to add something to allow |
---|
| 1880 | * different names for the different devices. |
---|
| 1881 | */ |
---|
| 1882 | if (sc->intr_task == 0) |
---|
| 1883 | sc->intr_task = rtems_bsdnet_newproc ("IEi0", 2048, i82586_intr_task, sc); |
---|
| 1884 | if (sc->tx_task == 0) |
---|
| 1885 | sc->tx_task = rtems_bsdnet_newproc ("IEt0", 2048, i82586_tx_task, sc); |
---|
| 1886 | |
---|
| 1887 | |
---|
| 1888 | /* |
---|
| 1889 | * Acknowledge any interrupts we have generated thus far. |
---|
| 1890 | */ |
---|
| 1891 | ie_ack(sc, IE_ST_WHENCE); |
---|
| 1892 | |
---|
| 1893 | /* |
---|
| 1894 | * Set up the transmit and recv buffers. |
---|
| 1895 | */ |
---|
| 1896 | i82586_setup_bufs(sc); |
---|
| 1897 | |
---|
| 1898 | if (sc->hwinit) |
---|
| 1899 | (sc->hwinit)(sc); |
---|
| 1900 | |
---|
| 1901 | ifp->if_flags |= IFF_RUNNING; |
---|
| 1902 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
| 1903 | |
---|
| 1904 | if (NTXBUF < 2) |
---|
| 1905 | sc->do_xmitnopchain = 0; |
---|
| 1906 | |
---|
| 1907 | i82586_start_transceiver(sc); |
---|
| 1908 | } |
---|
| 1909 | |
---|
| 1910 | /* |
---|
| 1911 | * Start the RU and possibly the CU unit |
---|
| 1912 | */ |
---|
| 1913 | static void |
---|
| 1914 | i82586_start_transceiver(struct ie_softc *sc) |
---|
| 1915 | { |
---|
| 1916 | #if I82586_DEBUG |
---|
| 1917 | I82586_TRACE(sc, I82586_RX_START, 0); |
---|
| 1918 | #endif |
---|
| 1919 | |
---|
| 1920 | /* |
---|
| 1921 | * Start RU at current position in frame & RBD lists. |
---|
| 1922 | */ |
---|
| 1923 | sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,sc->rfhead), |
---|
| 1924 | IE_RBD_ADDR(sc->rbds, sc->rbhead)); |
---|
| 1925 | |
---|
| 1926 | sc->ie_bus_write16(sc, IE_SCB_RCVLST(sc->scb), |
---|
| 1927 | IE_RFRAME_ADDR(sc->rframes,sc->rfhead)); |
---|
| 1928 | |
---|
| 1929 | if (sc->do_xmitnopchain) { |
---|
| 1930 | /* Stop transmit command chain */ |
---|
| 1931 | if (i82586_start_cmd(sc, IE_CUC_SUSPEND|IE_RUC_SUSPEND, 0, 0, 0)) |
---|
| 1932 | printf("%s: CU/RU stop command timed out\n", |
---|
| 1933 | sc->arpcom.ac_if.if_name); |
---|
| 1934 | |
---|
| 1935 | /* Start the receiver & transmitter chain */ |
---|
| 1936 | /* sc->scb->ie_command_list = |
---|
| 1937 | IEADDR(sc->nop_cmds[(sc->xctail+NTXBUF-1) % NTXBUF]);*/ |
---|
| 1938 | sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), |
---|
| 1939 | IE_CMD_NOP_ADDR( |
---|
| 1940 | sc->nop_cmds, |
---|
| 1941 | (sc->xctail + NTXBUF - 1) % NTXBUF)); |
---|
| 1942 | |
---|
| 1943 | if (i82586_start_cmd(sc, IE_CUC_START|IE_RUC_START, 0, 0, 0)) |
---|
| 1944 | printf("%s: CU/RU command timed out\n", |
---|
| 1945 | sc->arpcom.ac_if.if_name); |
---|
| 1946 | } else { |
---|
| 1947 | if (i82586_start_cmd(sc, IE_RUC_START, 0, 0, 0)) |
---|
| 1948 | printf("%s: RU command timed out\n", |
---|
| 1949 | sc->arpcom.ac_if.if_name); |
---|
| 1950 | } |
---|
| 1951 | } |
---|
| 1952 | |
---|
| 1953 | void |
---|
| 1954 | i82586_stop(struct ifnet *ifp, int disable) |
---|
| 1955 | { |
---|
| 1956 | struct ie_softc *sc = ifp->if_softc; |
---|
| 1957 | |
---|
| 1958 | if (i82586_start_cmd(sc, IE_RUC_SUSPEND | IE_CUC_SUSPEND, 0, 0, 0)) |
---|
| 1959 | printf("%s: iestop: disable commands timed out\n", |
---|
| 1960 | sc->arpcom.ac_if.if_name); |
---|
| 1961 | } |
---|
| 1962 | |
---|
| 1963 | int |
---|
| 1964 | i82586_ioctl(struct ifnet *ifp, int cmd, caddr_t data) |
---|
| 1965 | { |
---|
| 1966 | struct ie_softc *sc = ifp->if_softc; |
---|
| 1967 | // struct ifreq *ifr = (struct ifreq *)data; |
---|
| 1968 | int s; |
---|
| 1969 | int error = 0; |
---|
| 1970 | |
---|
| 1971 | s = splnet(); |
---|
| 1972 | switch(cmd) { |
---|
| 1973 | case SIOCGIFMEDIA: |
---|
| 1974 | case SIOCSIFMEDIA: |
---|
| 1975 | break; |
---|
| 1976 | case SIO_RTEMS_SHOW_STATS: |
---|
| 1977 | #if I82586_DEBUG |
---|
| 1978 | print_softie(sc); |
---|
| 1979 | #endif |
---|
| 1980 | break; |
---|
| 1981 | default: |
---|
| 1982 | error = ether_ioctl(ifp, cmd, data); |
---|
| 1983 | if (error == ENETRESET) { |
---|
| 1984 | /* |
---|
| 1985 | * Multicast list has changed; set the hardware filter |
---|
| 1986 | * accordingly. |
---|
| 1987 | */ |
---|
| 1988 | ie_mc_reset(sc); |
---|
| 1989 | error = 0; |
---|
| 1990 | } |
---|
| 1991 | break; |
---|
| 1992 | } |
---|
| 1993 | #if I82586_DEBUG |
---|
| 1994 | if (cmd == SIOCSIFFLAGS) |
---|
| 1995 | sc->sc_debug = (ifp->if_flags & IFF_DEBUG) ? IED_ALL : 0; |
---|
| 1996 | #endif |
---|
| 1997 | splx(s); |
---|
| 1998 | return (error); |
---|
| 1999 | } |
---|
| 2000 | |
---|
| 2001 | static void |
---|
| 2002 | ie_mc_reset(struct ie_softc *sc) |
---|
| 2003 | { |
---|
| 2004 | struct ether_multi *enm; |
---|
| 2005 | struct ether_multistep step; |
---|
| 2006 | int size; |
---|
| 2007 | |
---|
| 2008 | /* |
---|
| 2009 | * Step through the list of addresses. |
---|
| 2010 | */ |
---|
| 2011 | again: |
---|
| 2012 | size = 0; |
---|
| 2013 | sc->mcast_count = 0; |
---|
| 2014 | ETHER_FIRST_MULTI(step, &sc->arpcom, enm); |
---|
| 2015 | while (enm) { |
---|
| 2016 | size += 6; |
---|
| 2017 | if (sc->mcast_count >= IE_MAXMCAST || |
---|
| 2018 | memcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { |
---|
| 2019 | sc->arpcom.ac_if.if_flags |= IFF_ALLMULTI; |
---|
| 2020 | i82586_ioctl(&sc->arpcom.ac_if, |
---|
| 2021 | SIOCSIFFLAGS, (void *)0); |
---|
| 2022 | return; |
---|
| 2023 | } |
---|
| 2024 | ETHER_NEXT_MULTI(step, enm); |
---|
| 2025 | } |
---|
| 2026 | |
---|
| 2027 | if (size > sc->mcast_addrs_size) { |
---|
| 2028 | /* Need to allocate more space */ |
---|
| 2029 | if (sc->mcast_addrs_size) |
---|
| 2030 | free(sc->mcast_addrs, M_IPMADDR); |
---|
| 2031 | sc->mcast_addrs = (char *) |
---|
| 2032 | malloc(size, M_IPMADDR, M_WAITOK); |
---|
| 2033 | sc->mcast_addrs_size = size; |
---|
| 2034 | } |
---|
| 2035 | |
---|
| 2036 | /* |
---|
| 2037 | * We've got the space; now copy the addresses |
---|
| 2038 | */ |
---|
| 2039 | ETHER_FIRST_MULTI(step, &sc->arpcom, enm); |
---|
| 2040 | while (enm) { |
---|
| 2041 | if (sc->mcast_count >= IE_MAXMCAST) |
---|
| 2042 | goto again; /* Just in case */ |
---|
| 2043 | |
---|
| 2044 | memcpy(&sc->mcast_addrs[sc->mcast_count], enm->enm_addrlo, 6); |
---|
| 2045 | sc->mcast_count++; |
---|
| 2046 | ETHER_NEXT_MULTI(step, enm); |
---|
| 2047 | } |
---|
| 2048 | sc->want_mcsetup = 1; |
---|
| 2049 | } |
---|
| 2050 | |
---|
| 2051 | /* |
---|
| 2052 | * Media change callback. |
---|
| 2053 | */ |
---|
| 2054 | int |
---|
| 2055 | i82586_mediachange(struct ifnet *ifp) |
---|
| 2056 | { |
---|
| 2057 | struct ie_softc *sc = ifp->if_softc; |
---|
| 2058 | |
---|
| 2059 | if (sc->sc_mediachange) |
---|
| 2060 | return ((*sc->sc_mediachange)(sc)); |
---|
| 2061 | return (0); |
---|
| 2062 | } |
---|
| 2063 | |
---|
| 2064 | /* |
---|
| 2065 | * Media status callback. |
---|
| 2066 | */ |
---|
| 2067 | void |
---|
| 2068 | i82586_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) |
---|
| 2069 | { |
---|
| 2070 | struct ie_softc *sc = ifp->if_softc; |
---|
| 2071 | |
---|
| 2072 | if (sc->sc_mediastatus) |
---|
| 2073 | (*sc->sc_mediastatus)(sc, ifmr); |
---|
| 2074 | } |
---|
| 2075 | |
---|
| 2076 | #if I82586_DEBUG |
---|
| 2077 | static void |
---|
| 2078 | print_softie(struct ie_softc *sc) |
---|
| 2079 | { |
---|
| 2080 | static char *trace_labels[] = { |
---|
| 2081 | "INTS_REQ", |
---|
| 2082 | "INTS_IN", |
---|
| 2083 | "INTS_LOOPS", |
---|
| 2084 | "INTS_OUT", |
---|
| 2085 | "RX_INT", |
---|
| 2086 | "RX_DROP", |
---|
| 2087 | "RX_ERR", |
---|
| 2088 | "RX_OK", |
---|
| 2089 | "RX_START", |
---|
| 2090 | "START_TX", |
---|
| 2091 | "TX_START", |
---|
| 2092 | "TX_INT", |
---|
| 2093 | "TX_REQ", |
---|
| 2094 | "TX_EVT", |
---|
| 2095 | "TX_EMIT", |
---|
| 2096 | "TX_BAD", |
---|
| 2097 | "TX_ACTIVE", |
---|
| 2098 | "TRACE_CNT" |
---|
| 2099 | }; |
---|
| 2100 | |
---|
| 2101 | int i; |
---|
| 2102 | |
---|
| 2103 | printf("i82586 %s:\n", sc->arpcom.ac_if.if_name); |
---|
| 2104 | |
---|
| 2105 | printf(" iobase=%p\n", sc->sc_iobase); |
---|
| 2106 | |
---|
| 2107 | printf(" scp=0x%08x\t\tiscp=0x%08x\t\tscb=0x%08x\n", |
---|
| 2108 | sc->scp, sc->iscp, sc->scb); |
---|
| 2109 | printf(" buf_area=0x%08x\tbuf_area_sz=0x%08x\n", |
---|
| 2110 | sc->buf_area, sc->buf_area_sz); |
---|
| 2111 | printf(" rframes=0x%08x\trbds=0x%08x\t\trbufs=0x%08x\n", |
---|
| 2112 | sc->rframes, sc->rbds, sc->rbufs); |
---|
| 2113 | printf(" nop_cmds=0x%08x\txmit_cmds=0x%08x\n", |
---|
| 2114 | sc->nop_cmds, sc->xmit_cmds); |
---|
| 2115 | printf(" xbds=0x%08x\txbufs=0x%08x\n\n", |
---|
| 2116 | sc->xbds, sc->xbufs); |
---|
| 2117 | printf(" rfhead=%d\trftail=%d\n", |
---|
| 2118 | sc->rfhead, sc->rftail); |
---|
| 2119 | printf(" rbhead=%d\trbtail=%d\n", |
---|
| 2120 | sc->rbhead, sc->rbtail); |
---|
| 2121 | printf(" nframes=%d\tnrxbuf=%d\trnr_expect=%d\n", |
---|
| 2122 | sc->nframes, sc->nrxbuf, sc->rnr_expect); |
---|
| 2123 | printf(" xchead=%d\txctail=%d\n", |
---|
| 2124 | sc->xchead, sc->xctail); |
---|
| 2125 | printf(" xmit_busy=%d\txmit_req=%d\tdo_xmitnopchain=%d\n", |
---|
| 2126 | sc->xmit_busy, sc->xmit_req, sc->do_xmitnopchain); |
---|
| 2127 | printf(" promisc=%d\tasync_cmd_inprogress=%d\n\n", |
---|
| 2128 | sc->promisc, sc->async_cmd_inprogress); |
---|
| 2129 | |
---|
| 2130 | { |
---|
| 2131 | int cnt; |
---|
| 2132 | int in; |
---|
| 2133 | int lfdone = 0; |
---|
| 2134 | char *tabs; |
---|
| 2135 | |
---|
| 2136 | if (!sc->trace_flow_wrap) { |
---|
| 2137 | cnt = sc->trace_flow_in; |
---|
| 2138 | in = 0; |
---|
| 2139 | } |
---|
| 2140 | else { |
---|
| 2141 | cnt = I82586_TRACE_FLOW; |
---|
| 2142 | in = sc->trace_flow_in; |
---|
| 2143 | } |
---|
| 2144 | |
---|
| 2145 | sc->trace_flow_in = sc->trace_flow_wrap = 0; |
---|
| 2146 | |
---|
| 2147 | cnt /= 2; |
---|
| 2148 | |
---|
| 2149 | for (i = 0; i < cnt; i++) { |
---|
| 2150 | if (!lfdone) { |
---|
| 2151 | switch (sc->trace_flow[in]) { |
---|
| 2152 | case I82586_INTS_REQ: |
---|
| 2153 | case I82586_INTS_IN: |
---|
| 2154 | printf("\n"); |
---|
| 2155 | } |
---|
| 2156 | } |
---|
| 2157 | |
---|
| 2158 | lfdone = 0; |
---|
| 2159 | |
---|
| 2160 | if (strlen(trace_labels[sc->trace_flow[in]]) < 8) |
---|
| 2161 | tabs = "\t\t"; |
---|
| 2162 | else |
---|
| 2163 | tabs = "\t"; |
---|
| 2164 | |
---|
| 2165 | printf(" %d\t%s%s0x%08x (%d)\n", |
---|
| 2166 | i, trace_labels[sc->trace_flow[in]], tabs, |
---|
| 2167 | sc->trace_flow[in + 1], sc->trace_flow[in + 1]); |
---|
| 2168 | |
---|
| 2169 | switch (sc->trace_flow[in]) { |
---|
| 2170 | case I82586_INTS_REQ: |
---|
| 2171 | case I82586_INTS_OUT: |
---|
| 2172 | lfdone = 1; |
---|
| 2173 | printf("\n"); |
---|
| 2174 | } |
---|
| 2175 | |
---|
| 2176 | in += 2; |
---|
| 2177 | |
---|
| 2178 | if (in >= I82586_TRACE_FLOW) |
---|
| 2179 | in = 0; |
---|
| 2180 | } |
---|
| 2181 | } |
---|
| 2182 | } |
---|
| 2183 | |
---|
| 2184 | static void |
---|
| 2185 | print_rbd(struct ie_softc *sc, int n) |
---|
| 2186 | { |
---|
| 2187 | printf("RBD at %08x:\n status %04x, next %04x, buffer %lx\n" |
---|
| 2188 | "length/EOL %04x\n", IE_RBD_ADDR(sc->rbds,n), |
---|
| 2189 | sc->ie_bus_read16(sc, IE_RBD_STATUS(sc->rbds,n)), |
---|
| 2190 | sc->ie_bus_read16(sc, IE_RBD_NEXT(sc->rbds,n)), |
---|
| 2191 | (u_long)0,/*bus_space_read_4(sc->bt, sc->bh, IE_RBD_BUFADDR(sc->rbds,n)),-* XXX */ |
---|
| 2192 | sc->ie_bus_read16(sc, IE_RBD_BUFLEN(sc->rbds,n))); |
---|
| 2193 | } |
---|
| 2194 | |
---|
| 2195 | #endif |
---|