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Rev | Author | Line No. | Line |
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629 | giacomo | 1 | /* 8390.c: A general NS8390 ethernet driver core for linux. */ |
2 | /* |
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3 | Written 1992-94 by Donald Becker. |
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4 | |||
5 | Copyright 1993 United States Government as represented by the |
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6 | Director, National Security Agency. |
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7 | |||
8 | This software may be used and distributed according to the terms |
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9 | of the GNU Public License, incorporated herein by reference. |
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10 | |||
11 | The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O |
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12 | Center of Excellence in Space Data and Information Sciences |
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13 | Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 |
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14 | |||
15 | This is the chip-specific code for many 8390-based ethernet adaptors. |
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16 | This is not a complete driver, it must be combined with board-specific |
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17 | code such as ne.c, wd.c, 3c503.c, etc. |
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18 | |||
19 | Seeing how at least eight drivers use this code, (not counting the |
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20 | PCMCIA ones either) it is easy to break some card by what seems like |
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21 | a simple innocent change. Please contact me or Donald if you think |
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22 | you have found something that needs changing. -- PG |
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23 | |||
24 | |||
25 | Changelog: |
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26 | |||
27 | Paul Gortmaker : remove set_bit lock, other cleanups. |
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28 | Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to |
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29 | ei_block_input() for eth_io_copy_and_sum(). |
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30 | Paul Gortmaker : exchange static int ei_pingpong for a #define, |
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31 | also add better Tx error handling. |
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32 | Paul Gortmaker : rewrite Rx overrun handling as per NS specs. |
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33 | Alexey Kuznetsov : use the 8390's six bit hash multicast filter. |
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34 | Paul Gortmaker : tweak ANK's above multicast changes a bit. |
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35 | Paul Gortmaker : update packet statistics for v2.1.x |
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36 | Alan Cox : support arbitary stupid port mappings on the |
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37 | 68K Macintosh. Support >16bit I/O spaces |
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38 | Paul Gortmaker : add kmod support for auto-loading of the 8390 |
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39 | module by all drivers that require it. |
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40 | Alan Cox : Spinlocking work, added 'BUG_83C690' |
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41 | |||
42 | Sources: |
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43 | The National Semiconductor LAN Databook, and the 3Com 3c503 databook. |
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44 | |||
45 | */ |
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46 | |||
47 | static const char *version = |
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48 | "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; |
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49 | |||
50 | #include <linux/module.h> |
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51 | #include <linux/kernel.h> |
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52 | #include <linux/sched.h> |
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53 | #include <linux/fs.h> |
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54 | #include <linux/types.h> |
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55 | #include <linux/ptrace.h> |
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56 | #include <linux/string.h> |
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57 | #include <asm/system.h> |
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58 | #include <asm/uaccess.h> |
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59 | #include <asm/bitops.h> |
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60 | #include <asm/io.h> |
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61 | #include <asm/irq.h> |
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62 | #include <linux/delay.h> |
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63 | #include <linux/errno.h> |
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64 | #include <linux/fcntl.h> |
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65 | #include <linux/in.h> |
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66 | #include <linux/interrupt.h> |
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67 | #include <linux/init.h> |
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68 | |||
69 | #include <linux/netdevice.h> |
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70 | #include <linux/etherdevice.h> |
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71 | |||
72 | #define NS8390_CORE |
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73 | #include "8390.h" |
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74 | |||
75 | #define BUG_83C690 |
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76 | |||
77 | /* These are the operational function interfaces to board-specific |
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78 | routines. |
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79 | void reset_8390(struct device *dev) |
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80 | Resets the board associated with DEV, including a hardware reset of |
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81 | the 8390. This is only called when there is a transmit timeout, and |
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82 | it is always followed by 8390_init(). |
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83 | void block_output(struct device *dev, int count, const unsigned char *buf, |
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84 | int start_page) |
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85 | Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The |
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86 | "page" value uses the 8390's 256-byte pages. |
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87 | void get_8390_hdr(struct device *dev, struct e8390_hdr *hdr, int ring_page) |
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88 | Read the 4 byte, page aligned 8390 header. *If* there is a |
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89 | subsequent read, it will be of the rest of the packet. |
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90 | void block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset) |
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91 | Read COUNT bytes from the packet buffer into the skb data area. Start |
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92 | reading from RING_OFFSET, the address as the 8390 sees it. This will always |
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93 | follow the read of the 8390 header. |
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94 | */ |
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95 | #define ei_reset_8390 (ei_local->reset_8390) |
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96 | #define ei_block_output (ei_local->block_output) |
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97 | #define ei_block_input (ei_local->block_input) |
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98 | #define ei_get_8390_hdr (ei_local->get_8390_hdr) |
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99 | |||
100 | /* use 0 for production, 1 for verification, >2 for debug */ |
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101 | //#define VERBOSE_ERROR_DUMP |
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102 | #ifndef ei_debug |
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103 | int ei_debug = 0; |
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104 | #endif |
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105 | |||
106 | /* Index to functions. */ |
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107 | static void ei_tx_intr(struct device *dev); |
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108 | static void ei_tx_err(struct device *dev); |
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109 | static void ei_receive(struct device *dev); |
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110 | static void ei_rx_overrun(struct device *dev); |
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111 | |||
112 | /* Routines generic to NS8390-based boards. */ |
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113 | static void NS8390_trigger_send(struct device *dev, unsigned int length, |
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114 | int start_page); |
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115 | static void set_multicast_list(struct device *dev); |
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116 | static void do_set_multicast_list(struct device *dev); |
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117 | |||
118 | /* |
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119 | * SMP and the 8390 setup. |
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120 | * |
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121 | * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is |
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122 | * a page register that controls bank and packet buffer access. We guard |
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123 | * this with ei_local->page_lock. Nobody should assume or set the page other |
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124 | * than zero when the lock is not held. Lock holders must restore page 0 |
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125 | * before unlocking. Even pure readers must take the lock to protect in |
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126 | * page 0. |
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127 | * |
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128 | * To make life difficult the chip can also be very slow. We therefore can't |
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129 | * just use spinlocks. For the longer lockups we disable the irq the device |
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130 | * sits on and hold the lock. We must hold the lock because there is a dual |
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131 | * processor case other than interrupts (get stats/set multicast list in |
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132 | * parallel with each other and transmit). |
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133 | * |
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134 | * Note: in theory we can just disable the irq on the card _but_ there is |
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135 | * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" |
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136 | * enter lock, take the queued irq. So we waddle instead of flying. |
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137 | * |
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138 | * Finally by special arrangement for the purpose of being generally |
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139 | * annoying the transmit function is called bh atomic. That places |
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140 | * restrictions on the user context callers as disable_irq won't save |
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141 | * them. |
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142 | */ |
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143 | |||
144 | |||
145 | |||
146 | /* Open/initialize the board. This routine goes all-out, setting everything |
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147 | up anew at each open, even though many of these registers should only |
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148 | need to be set once at boot. |
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149 | */ |
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150 | int ei_open(struct device *dev) |
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151 | { |
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152 | unsigned long flags; |
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153 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
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154 | |||
155 | /* This can't happen unless somebody forgot to call ethdev_init(). */ |
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156 | if (ei_local == NULL) |
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157 | { |
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158 | printk(KERN_EMERG "%s: ei_open passed a non-existent device!\n", dev->name); |
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159 | return -ENXIO; |
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160 | } |
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161 | |||
162 | /* |
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163 | * Grab the page lock so we own the register set, then call |
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164 | * the init function. |
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165 | */ |
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166 | |||
167 | spin_lock_irqsave(&ei_local->page_lock, flags); |
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168 | NS8390_init(dev, 1); |
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169 | /* Set the flag before we drop the lock, That way the IRQ arrives |
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170 | after its set and we get no silly warnings */ |
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171 | dev->start = 1; |
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172 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
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173 | ei_local->irqlock = 0; |
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174 | return 0; |
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175 | } |
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176 | |||
177 | /* Opposite of above. Only used when "ifconfig <devname> down" is done. */ |
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178 | int ei_close(struct device *dev) |
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179 | { |
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180 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
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181 | unsigned long flags; |
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182 | |||
183 | /* |
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184 | * Hold the page lock during close |
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185 | */ |
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186 | |||
187 | spin_lock_irqsave(&ei_local->page_lock, flags); |
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188 | NS8390_init(dev, 0); |
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189 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
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190 | dev->start = 0; |
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191 | return 0; |
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192 | } |
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193 | |||
194 | static int ei_start_xmit(struct sk_buff *skb, struct device *dev) |
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195 | { |
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196 | long e8390_base = dev->base_addr; |
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197 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
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198 | int length, send_length, output_page; |
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199 | unsigned long flags; |
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200 | |||
201 | /* |
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202 | * We normally shouldn't be called if dev->tbusy is set, but the |
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203 | * existing code does anyway. If it has been too long since the |
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204 | * last Tx, we assume the board has died and kick it. We are |
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205 | * bh_atomic here. |
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206 | */ |
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207 | |||
208 | if (dev->tbusy) |
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209 | { /* Do timeouts, just like the 8003 driver. */ |
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210 | int txsr; |
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211 | int isr; |
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212 | int tickssofar = jiffies - dev->trans_start; |
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213 | |||
214 | /* |
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215 | * Need the page lock. Now see what went wrong. This bit is |
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216 | * fast. |
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217 | */ |
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218 | |||
219 | spin_lock_irqsave(&ei_local->page_lock, flags); |
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220 | txsr = inb(e8390_base+EN0_TSR); |
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221 | if (tickssofar < TX_TIMEOUT || (tickssofar < (TX_TIMEOUT+5) && ! (txsr & ENTSR_PTX))) |
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222 | { |
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223 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
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224 | return 1; |
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225 | } |
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226 | |||
227 | ei_local->stat.tx_errors++; |
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228 | isr = inb(e8390_base+EN0_ISR); |
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229 | if (dev->start == 0) |
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230 | { |
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231 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
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232 | printk(KERN_WARNING "%s: xmit on stopped card\n", dev->name); |
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233 | return 1; |
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234 | } |
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235 | |||
236 | /* |
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237 | * Note that if the Tx posted a TX_ERR interrupt, then the |
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238 | * error will have been handled from the interrupt handler |
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239 | * and not here. Error statistics are handled there as well. |
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240 | */ |
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241 | |||
242 | printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", |
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243 | dev->name, (txsr & ENTSR_ABT) ? "excess collisions." : |
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244 | (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar); |
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245 | |||
246 | if (!isr && !ei_local->stat.tx_packets) |
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247 | { |
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248 | /* The 8390 probably hasn't gotten on the cable yet. */ |
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249 | ei_local->interface_num ^= 1; /* Try a different xcvr. */ |
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250 | } |
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251 | |||
252 | /* |
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253 | * Play shuffle the locks, a reset on some chips takes a few |
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254 | * mS. We very rarely hit this point. |
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255 | */ |
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256 | |||
257 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
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258 | |||
259 | /* Ugly but a reset can be slow, yet must be protected */ |
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260 | |||
261 | disable_irq_nosync(dev->irq); |
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262 | spin_lock(&ei_local->page_lock); |
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263 | |||
264 | /* Try to restart the card. Perhaps the user has fixed something. */ |
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265 | ei_reset_8390(dev); |
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266 | NS8390_init(dev, 1); |
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267 | |||
268 | spin_unlock(&ei_local->page_lock); |
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269 | enable_irq(dev->irq); |
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270 | dev->trans_start = jiffies; |
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271 | } |
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272 | |||
273 | length = skb->len; |
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274 | |||
275 | /* Mask interrupts from the ethercard. |
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276 | SMP: We have to grab the lock here otherwise the IRQ handler |
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277 | on another CPU can flip window and race the IRQ mask set. We end |
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278 | up trashing the mcast filter not disabling irqs if we dont lock */ |
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279 | |||
280 | spin_lock_irqsave(&ei_local->page_lock, flags); |
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281 | outb_p(0x00, e8390_base + EN0_IMR); |
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282 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
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283 | |||
284 | |||
285 | /* |
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286 | * Slow phase with lock held. |
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287 | */ |
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288 | |||
289 | disable_irq_nosync(dev->irq); |
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290 | |||
291 | spin_lock(&ei_local->page_lock); |
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292 | |||
293 | if (dev->interrupt) |
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294 | { |
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295 | printk(KERN_WARNING "%s: Tx request while isr active.\n",dev->name); |
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296 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
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297 | spin_unlock(&ei_local->page_lock); |
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298 | enable_irq(dev->irq); |
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299 | ei_local->stat.tx_errors++; |
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300 | dev_kfree_skb(skb); |
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301 | return 0; |
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302 | } |
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303 | ei_local->irqlock = 1; |
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304 | |||
305 | send_length = ETH_ZLEN < length ? length : ETH_ZLEN; |
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306 | |||
307 | #ifdef EI_PINGPONG |
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308 | |||
309 | /* |
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310 | * We have two Tx slots available for use. Find the first free |
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311 | * slot, and then perform some sanity checks. With two Tx bufs, |
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312 | * you get very close to transmitting back-to-back packets. With |
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313 | * only one Tx buf, the transmitter sits idle while you reload the |
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314 | * card, leaving a substantial gap between each transmitted packet. |
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315 | */ |
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316 | |||
317 | if (ei_local->tx1 == 0) |
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318 | { |
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319 | output_page = ei_local->tx_start_page; |
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320 | ei_local->tx1 = send_length; |
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321 | if (ei_debug && ei_local->tx2 > 0) |
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322 | printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n", |
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323 | dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing); |
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324 | } |
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325 | else if (ei_local->tx2 == 0) |
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326 | { |
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327 | output_page = ei_local->tx_start_page + TX_1X_PAGES; |
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328 | ei_local->tx2 = send_length; |
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329 | if (ei_debug && ei_local->tx1 > 0) |
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330 | printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n", |
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331 | dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing); |
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332 | } |
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333 | else |
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334 | { /* We should never get here. */ |
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335 | if (ei_debug) |
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336 | printk(KERN_DEBUG "%s: No Tx buffers free! irq=%ld tx1=%d tx2=%d last=%d\n", |
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337 | dev->name, dev->interrupt, ei_local->tx1, ei_local->tx2, ei_local->lasttx); |
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338 | ei_local->irqlock = 0; |
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339 | dev->tbusy = 1; |
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340 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
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341 | spin_unlock(&ei_local->page_lock); |
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342 | enable_irq(dev->irq); |
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343 | ei_local->stat.tx_errors++; |
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344 | return 1; |
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345 | } |
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346 | |||
347 | /* |
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348 | * Okay, now upload the packet and trigger a send if the transmitter |
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349 | * isn't already sending. If it is busy, the interrupt handler will |
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350 | * trigger the send later, upon receiving a Tx done interrupt. |
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351 | */ |
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352 | |||
353 | ei_block_output(dev, length, skb->data, output_page); |
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354 | if (! ei_local->txing) |
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355 | { |
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356 | ei_local->txing = 1; |
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357 | NS8390_trigger_send(dev, send_length, output_page); |
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358 | dev->trans_start = jiffies; |
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359 | if (output_page == ei_local->tx_start_page) |
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360 | { |
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361 | ei_local->tx1 = -1; |
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362 | ei_local->lasttx = -1; |
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363 | } |
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364 | else |
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365 | { |
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366 | ei_local->tx2 = -1; |
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367 | ei_local->lasttx = -2; |
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368 | } |
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369 | } |
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370 | else ei_local->txqueue++; |
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371 | |||
372 | dev->tbusy = (ei_local->tx1 && ei_local->tx2); |
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373 | |||
374 | #else /* EI_PINGPONG */ |
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375 | |||
376 | /* |
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377 | * Only one Tx buffer in use. You need two Tx bufs to come close to |
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378 | * back-to-back transmits. Expect a 20 -> 25% performance hit on |
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379 | * reasonable hardware if you only use one Tx buffer. |
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380 | */ |
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381 | |||
382 | ei_block_output(dev, length, skb->data, ei_local->tx_start_page); |
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383 | ei_local->txing = 1; |
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384 | NS8390_trigger_send(dev, send_length, ei_local->tx_start_page); |
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385 | dev->trans_start = jiffies; |
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386 | dev->tbusy = 1; |
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387 | |||
388 | #endif /* EI_PINGPONG */ |
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389 | |||
390 | /* Turn 8390 interrupts back on. */ |
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391 | ei_local->irqlock = 0; |
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392 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
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393 | |||
394 | spin_unlock(&ei_local->page_lock); |
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395 | enable_irq(dev->irq); |
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396 | |||
397 | dev_kfree_skb (skb); |
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398 | ei_local->stat.tx_bytes += send_length; |
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399 | |||
400 | return 0; |
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401 | } |
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402 | |||
403 | /* The typical workload of the driver: |
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404 | Handle the ether interface interrupts. */ |
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405 | |||
406 | void ei_interrupt(int irq, void *dev_id, struct pt_regs * regs) |
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407 | { |
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408 | struct device *dev = dev_id; |
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409 | long e8390_base; |
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410 | int interrupts, nr_serviced = 0; |
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411 | struct ei_device *ei_local; |
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412 | |||
413 | if (dev == NULL) |
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414 | { |
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415 | printk ("net_interrupt(): irq %d for unknown device.\n", irq); |
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416 | return; |
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417 | } |
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418 | |||
419 | e8390_base = dev->base_addr; |
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420 | ei_local = (struct ei_device *) dev->priv; |
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421 | |||
422 | /* |
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423 | * Protect the irq test too. |
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424 | */ |
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425 | |||
426 | spin_lock(&ei_local->page_lock); |
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427 | |||
428 | if (dev->interrupt || ei_local->irqlock) |
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429 | { |
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430 | #if 1 /* This might just be an interrupt for a PCI device sharing this line */ |
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431 | /* The "irqlock" check is only for testing. */ |
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432 | printk(ei_local->irqlock |
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433 | ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n" |
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434 | : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n", |
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435 | dev->name, inb_p(e8390_base + EN0_ISR), |
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436 | inb_p(e8390_base + EN0_IMR)); |
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437 | #endif |
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438 | spin_unlock(&ei_local->page_lock); |
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439 | return; |
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440 | } |
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441 | |||
442 | |||
443 | dev->interrupt = 1; |
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444 | |||
445 | /* Change to page 0 and read the intr status reg. */ |
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446 | outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); |
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447 | if (ei_debug > 3) |
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448 | printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name, |
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449 | inb_p(e8390_base + EN0_ISR)); |
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450 | |||
451 | /* !!Assumption!! -- we stay in page 0. Don't break this. */ |
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452 | while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 |
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453 | && ++nr_serviced < MAX_SERVICE) |
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454 | { |
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455 | if (dev->start == 0) |
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456 | { |
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457 | printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name); |
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458 | interrupts = 0; |
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459 | break; |
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460 | } |
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461 | if (interrupts & ENISR_OVER) |
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462 | ei_rx_overrun(dev); |
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463 | else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) |
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464 | { |
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465 | /* Got a good (?) packet. */ |
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466 | ei_receive(dev); |
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467 | } |
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468 | /* Push the next to-transmit packet through. */ |
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469 | if (interrupts & ENISR_TX) |
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470 | ei_tx_intr(dev); |
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471 | else if (interrupts & ENISR_TX_ERR) |
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472 | ei_tx_err(dev); |
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473 | |||
474 | if (interrupts & ENISR_COUNTERS) |
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475 | { |
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476 | ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); |
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477 | ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); |
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478 | ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); |
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479 | outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */ |
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480 | } |
||
481 | |||
482 | /* Ignore any RDC interrupts that make it back to here. */ |
||
483 | if (interrupts & ENISR_RDC) |
||
484 | { |
||
485 | outb_p(ENISR_RDC, e8390_base + EN0_ISR); |
||
486 | } |
||
487 | |||
488 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); |
||
489 | } |
||
490 | |||
491 | if (interrupts && ei_debug) |
||
492 | { |
||
493 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD); |
||
494 | if (nr_serviced >= MAX_SERVICE) |
||
495 | { |
||
496 | printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n", |
||
497 | dev->name, interrupts); |
||
498 | outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ |
||
499 | } else { |
||
500 | printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts); |
||
501 | outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ |
||
502 | } |
||
503 | } |
||
504 | dev->interrupt = 0; |
||
505 | spin_unlock(&ei_local->page_lock); |
||
506 | return; |
||
507 | } |
||
508 | |||
509 | /* |
||
510 | * A transmitter error has happened. Most likely excess collisions (which |
||
511 | * is a fairly normal condition). If the error is one where the Tx will |
||
512 | * have been aborted, we try and send another one right away, instead of |
||
513 | * letting the failed packet sit and collect dust in the Tx buffer. This |
||
514 | * is a much better solution as it avoids kernel based Tx timeouts, and |
||
515 | * an unnecessary card reset. |
||
516 | * |
||
517 | * Called with lock held |
||
518 | */ |
||
519 | |||
520 | static void ei_tx_err(struct device *dev) |
||
521 | { |
||
522 | long e8390_base = dev->base_addr; |
||
523 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
524 | unsigned char txsr = inb_p(e8390_base+EN0_TSR); |
||
525 | unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); |
||
526 | |||
527 | #ifdef VERBOSE_ERROR_DUMP |
||
528 | printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr); |
||
529 | if (txsr & ENTSR_ABT) |
||
530 | printk("excess-collisions "); |
||
531 | if (txsr & ENTSR_ND) |
||
532 | printk("non-deferral "); |
||
533 | if (txsr & ENTSR_CRS) |
||
534 | printk("lost-carrier "); |
||
535 | if (txsr & ENTSR_FU) |
||
536 | printk("FIFO-underrun "); |
||
537 | if (txsr & ENTSR_CDH) |
||
538 | printk("lost-heartbeat "); |
||
539 | printk("\n"); |
||
540 | #endif |
||
541 | |||
542 | outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */ |
||
543 | |||
544 | if (tx_was_aborted) |
||
545 | ei_tx_intr(dev); |
||
546 | else |
||
547 | { |
||
548 | ei_local->stat.tx_errors++; |
||
549 | if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++; |
||
550 | if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++; |
||
551 | if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++; |
||
552 | } |
||
553 | } |
||
554 | |||
555 | /* We have finished a transmit: check for errors and then trigger the next |
||
556 | packet to be sent. Called with lock held */ |
||
557 | |||
558 | static void ei_tx_intr(struct device *dev) |
||
559 | { |
||
560 | long e8390_base = dev->base_addr; |
||
561 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
562 | int status = inb(e8390_base + EN0_TSR); |
||
563 | |||
564 | outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */ |
||
565 | |||
566 | #ifdef EI_PINGPONG |
||
567 | |||
568 | /* |
||
569 | * There are two Tx buffers, see which one finished, and trigger |
||
570 | * the send of another one if it exists. |
||
571 | */ |
||
572 | ei_local->txqueue--; |
||
573 | |||
574 | if (ei_local->tx1 < 0) |
||
575 | { |
||
576 | if (ei_local->lasttx != 1 && ei_local->lasttx != -1) |
||
577 | printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n", |
||
578 | ei_local->name, ei_local->lasttx, ei_local->tx1); |
||
579 | ei_local->tx1 = 0; |
||
580 | dev->tbusy = 0; |
||
581 | if (ei_local->tx2 > 0) |
||
582 | { |
||
583 | ei_local->txing = 1; |
||
584 | NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); |
||
585 | dev->trans_start = jiffies; |
||
586 | ei_local->tx2 = -1, |
||
587 | ei_local->lasttx = 2; |
||
588 | } |
||
589 | else ei_local->lasttx = 20, ei_local->txing = 0; |
||
590 | } |
||
591 | else if (ei_local->tx2 < 0) |
||
592 | { |
||
593 | if (ei_local->lasttx != 2 && ei_local->lasttx != -2) |
||
594 | printk("%s: bogus last_tx_buffer %d, tx2=%d.\n", |
||
595 | ei_local->name, ei_local->lasttx, ei_local->tx2); |
||
596 | ei_local->tx2 = 0; |
||
597 | dev->tbusy = 0; |
||
598 | if (ei_local->tx1 > 0) |
||
599 | { |
||
600 | ei_local->txing = 1; |
||
601 | NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); |
||
602 | dev->trans_start = jiffies; |
||
603 | ei_local->tx1 = -1; |
||
604 | ei_local->lasttx = 1; |
||
605 | } |
||
606 | else |
||
607 | ei_local->lasttx = 10, ei_local->txing = 0; |
||
608 | } |
||
609 | else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n", |
||
610 | dev->name, ei_local->lasttx); |
||
611 | |||
612 | #else /* EI_PINGPONG */ |
||
613 | /* |
||
614 | * Single Tx buffer: mark it free so another packet can be loaded. |
||
615 | */ |
||
616 | ei_local->txing = 0; |
||
617 | dev->tbusy = 0; |
||
618 | #endif |
||
619 | |||
620 | /* Minimize Tx latency: update the statistics after we restart TXing. */ |
||
621 | if (status & ENTSR_COL) |
||
622 | ei_local->stat.collisions++; |
||
623 | if (status & ENTSR_PTX) |
||
624 | ei_local->stat.tx_packets++; |
||
625 | else |
||
626 | { |
||
627 | ei_local->stat.tx_errors++; |
||
628 | if (status & ENTSR_ABT) |
||
629 | { |
||
630 | ei_local->stat.tx_aborted_errors++; |
||
631 | ei_local->stat.collisions += 16; |
||
632 | } |
||
633 | if (status & ENTSR_CRS) |
||
634 | ei_local->stat.tx_carrier_errors++; |
||
635 | if (status & ENTSR_FU) |
||
636 | ei_local->stat.tx_fifo_errors++; |
||
637 | if (status & ENTSR_CDH) |
||
638 | ei_local->stat.tx_heartbeat_errors++; |
||
639 | if (status & ENTSR_OWC) |
||
640 | ei_local->stat.tx_window_errors++; |
||
641 | } |
||
642 | mark_bh (NET_BH); |
||
643 | } |
||
644 | |||
645 | /* We have a good packet(s), get it/them out of the buffers. |
||
646 | Called with lock held */ |
||
647 | |||
648 | static void ei_receive(struct device *dev) |
||
649 | { |
||
650 | long e8390_base = dev->base_addr; |
||
651 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
652 | unsigned char rxing_page, this_frame, next_frame; |
||
653 | unsigned short current_offset; |
||
654 | int rx_pkt_count = 0; |
||
655 | struct e8390_pkt_hdr rx_frame; |
||
656 | int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page; |
||
657 | |||
658 | while (++rx_pkt_count < 10) |
||
659 | { |
||
660 | int pkt_len, pkt_stat; |
||
661 | |||
662 | /* Get the rx page (incoming packet pointer). */ |
||
663 | outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD); |
||
664 | rxing_page = inb_p(e8390_base + EN1_CURPAG); |
||
665 | outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD); |
||
666 | |||
667 | /* Remove one frame from the ring. Boundary is always a page behind. */ |
||
668 | this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; |
||
669 | if (this_frame >= ei_local->stop_page) |
||
670 | this_frame = ei_local->rx_start_page; |
||
671 | |||
672 | /* Someday we'll omit the previous, iff we never get this message. |
||
673 | (There is at least one clone claimed to have a problem.) */ |
||
674 | if (ei_debug > 0 && this_frame != ei_local->current_page) |
||
675 | printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n", |
||
676 | dev->name, this_frame, ei_local->current_page); |
||
677 | |||
678 | if (this_frame == rxing_page) /* Read all the frames? */ |
||
679 | break; /* Done for now */ |
||
680 | |||
681 | current_offset = this_frame << 8; |
||
682 | ei_get_8390_hdr(dev, &rx_frame, this_frame); |
||
683 | |||
684 | pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); |
||
685 | pkt_stat = rx_frame.status; |
||
686 | |||
687 | next_frame = this_frame + 1 + ((pkt_len+4)>>8); |
||
688 | |||
689 | /* Check for bogosity warned by 3c503 book: the status byte is never |
||
690 | written. This happened a lot during testing! This code should be |
||
691 | cleaned up someday. */ |
||
692 | if (rx_frame.next != next_frame |
||
693 | && rx_frame.next != next_frame + 1 |
||
694 | && rx_frame.next != next_frame - num_rx_pages |
||
695 | && rx_frame.next != next_frame + 1 - num_rx_pages) { |
||
696 | ei_local->current_page = rxing_page; |
||
697 | outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY); |
||
698 | ei_local->stat.rx_errors++; |
||
699 | continue; |
||
700 | } |
||
701 | |||
702 | if (pkt_len < 60 || pkt_len > 1518) |
||
703 | { |
||
704 | if (ei_debug) |
||
705 | printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n", |
||
706 | dev->name, rx_frame.count, rx_frame.status, |
||
707 | rx_frame.next); |
||
708 | ei_local->stat.rx_errors++; |
||
709 | ei_local->stat.rx_length_errors++; |
||
710 | } |
||
711 | else if ((pkt_stat & 0x0F) == ENRSR_RXOK) |
||
712 | { |
||
713 | struct sk_buff *skb; |
||
714 | |||
715 | skb = dev_alloc_skb(pkt_len+2); |
||
716 | if (skb == NULL) |
||
717 | { |
||
718 | if (ei_debug > 1) |
||
719 | printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n", |
||
720 | dev->name, pkt_len); |
||
721 | ei_local->stat.rx_dropped++; |
||
722 | break; |
||
723 | } |
||
724 | else |
||
725 | { |
||
726 | skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ |
||
727 | skb->dev = dev; |
||
728 | skb_put(skb, pkt_len); /* Make room */ |
||
729 | ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); |
||
730 | skb->protocol=eth_type_trans(skb,dev); |
||
731 | netif_rx(skb); |
||
732 | ei_local->stat.rx_packets++; |
||
733 | ei_local->stat.rx_bytes += pkt_len; |
||
734 | if (pkt_stat & ENRSR_PHY) |
||
735 | ei_local->stat.multicast++; |
||
736 | } |
||
737 | } |
||
738 | else |
||
739 | { |
||
740 | if (ei_debug) |
||
741 | printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n", |
||
742 | dev->name, rx_frame.status, rx_frame.next, |
||
743 | rx_frame.count); |
||
744 | ei_local->stat.rx_errors++; |
||
745 | /* NB: The NIC counts CRC, frame and missed errors. */ |
||
746 | if (pkt_stat & ENRSR_FO) |
||
747 | ei_local->stat.rx_fifo_errors++; |
||
748 | } |
||
749 | next_frame = rx_frame.next; |
||
750 | |||
751 | /* This _should_ never happen: it's here for avoiding bad clones. */ |
||
752 | if (next_frame >= ei_local->stop_page) { |
||
753 | printk("%s: next frame inconsistency, %#2x\n", dev->name, |
||
754 | next_frame); |
||
755 | next_frame = ei_local->rx_start_page; |
||
756 | } |
||
757 | ei_local->current_page = next_frame; |
||
758 | outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); |
||
759 | } |
||
760 | |||
761 | /* We used to also ack ENISR_OVER here, but that would sometimes mask |
||
762 | a real overrun, leaving the 8390 in a stopped state with rec'vr off. */ |
||
763 | outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR); |
||
764 | return; |
||
765 | } |
||
766 | |||
767 | /* |
||
768 | * We have a receiver overrun: we have to kick the 8390 to get it started |
||
769 | * again. Problem is that you have to kick it exactly as NS prescribes in |
||
770 | * the updated datasheets, or "the NIC may act in an unpredictable manner." |
||
771 | * This includes causing "the NIC to defer indefinitely when it is stopped |
||
772 | * on a busy network." Ugh. |
||
773 | * Called with lock held. Don't call this with the interrupts off or your |
||
774 | * computer will hate you - it takes 10mS or so. |
||
775 | */ |
||
776 | |||
777 | static void ei_rx_overrun(struct device *dev) |
||
778 | { |
||
779 | long e8390_base = dev->base_addr; |
||
780 | unsigned char was_txing, must_resend = 0; |
||
781 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
782 | |||
783 | /* |
||
784 | * Record whether a Tx was in progress and then issue the |
||
785 | * stop command. |
||
786 | */ |
||
787 | was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; |
||
788 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); |
||
789 | |||
790 | if (ei_debug > 1) |
||
791 | printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name); |
||
792 | ei_local->stat.rx_over_errors++; |
||
793 | |||
794 | /* |
||
795 | * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. |
||
796 | * Early datasheets said to poll the reset bit, but now they say that |
||
797 | * it "is not a reliable indicator and subsequently should be ignored." |
||
798 | * We wait at least 10ms. |
||
799 | */ |
||
800 | |||
801 | udelay(10*1000); |
||
802 | |||
803 | /* |
||
804 | * Reset RBCR[01] back to zero as per magic incantation. |
||
805 | */ |
||
806 | outb_p(0x00, e8390_base+EN0_RCNTLO); |
||
807 | outb_p(0x00, e8390_base+EN0_RCNTHI); |
||
808 | |||
809 | /* |
||
810 | * See if any Tx was interrupted or not. According to NS, this |
||
811 | * step is vital, and skipping it will cause no end of havoc. |
||
812 | */ |
||
813 | |||
814 | if (was_txing) |
||
815 | { |
||
816 | unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); |
||
817 | if (!tx_completed) |
||
818 | must_resend = 1; |
||
819 | } |
||
820 | |||
821 | /* |
||
822 | * Have to enter loopback mode and then restart the NIC before |
||
823 | * you are allowed to slurp packets up off the ring. |
||
824 | */ |
||
825 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); |
||
826 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); |
||
827 | |||
828 | /* |
||
829 | * Clear the Rx ring of all the debris, and ack the interrupt. |
||
830 | */ |
||
831 | ei_receive(dev); |
||
832 | outb_p(ENISR_OVER, e8390_base+EN0_ISR); |
||
833 | |||
834 | /* |
||
835 | * Leave loopback mode, and resend any packet that got stopped. |
||
836 | */ |
||
837 | outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); |
||
838 | if (must_resend) |
||
839 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); |
||
840 | } |
||
841 | |||
842 | /* |
||
843 | * Collect the stats. This is called unlocked and from several contexts. |
||
844 | */ |
||
845 | |||
846 | static struct net_device_stats *get_stats(struct device *dev) |
||
847 | { |
||
848 | long ioaddr = dev->base_addr; |
||
849 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
850 | unsigned long flags; |
||
851 | |||
852 | /* If the card is stopped, just return the present stats. */ |
||
853 | if (dev->start == 0) |
||
854 | return &ei_local->stat; |
||
855 | |||
856 | spin_lock_irqsave(&ei_local->page_lock,flags); |
||
857 | /* Read the counter registers, assuming we are in page 0. */ |
||
858 | ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); |
||
859 | ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); |
||
860 | ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); |
||
861 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
||
862 | |||
863 | return &ei_local->stat; |
||
864 | } |
||
865 | |||
866 | /* |
||
867 | * Update the given Autodin II CRC value with another data byte. |
||
868 | */ |
||
869 | |||
870 | static inline u32 update_crc(u8 byte, u32 current_crc) |
||
871 | { |
||
872 | int bit; |
||
873 | u8 ah = 0; |
||
874 | for (bit=0; bit<8; bit++) |
||
875 | { |
||
876 | u8 carry = (current_crc>>31); |
||
877 | current_crc <<= 1; |
||
878 | ah = ((ah<<1) | carry) ^ byte; |
||
879 | if (ah&1) |
||
880 | current_crc ^= 0x04C11DB7; /* CRC polynomial */ |
||
881 | ah >>= 1; |
||
882 | byte >>= 1; |
||
883 | } |
||
884 | return current_crc; |
||
885 | } |
||
886 | |||
887 | /* |
||
888 | * Form the 64 bit 8390 multicast table from the linked list of addresses |
||
889 | * associated with this dev structure. |
||
890 | */ |
||
891 | |||
892 | static inline void make_mc_bits(u8 *bits, struct device *dev) |
||
893 | { |
||
894 | struct dev_mc_list *dmi; |
||
895 | |||
896 | for (dmi=dev->mc_list; dmi; dmi=dmi->next) |
||
897 | { |
||
898 | int i; |
||
899 | u32 crc; |
||
900 | if (dmi->dmi_addrlen != ETH_ALEN) |
||
901 | { |
||
902 | printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name); |
||
903 | continue; |
||
904 | } |
||
905 | crc = 0xffffffff; /* initial CRC value */ |
||
906 | for (i=0; i<ETH_ALEN; i++) |
||
907 | crc = update_crc(dmi->dmi_addr[i], crc); |
||
908 | /* |
||
909 | * The 8390 uses the 6 most significant bits of the |
||
910 | * CRC to index the multicast table. |
||
911 | */ |
||
912 | bits[crc>>29] |= (1<<((crc>>26)&7)); |
||
913 | } |
||
914 | } |
||
915 | |||
916 | /* |
||
917 | * Set or clear the multicast filter for this adaptor. May be called |
||
918 | * from a BH in 2.1.x. Must be called with lock held. |
||
919 | */ |
||
920 | |||
921 | static void do_set_multicast_list(struct device *dev) |
||
922 | { |
||
923 | long e8390_base = dev->base_addr; |
||
924 | int i; |
||
925 | struct ei_device *ei_local = (struct ei_device*)dev->priv; |
||
926 | |||
927 | if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) |
||
928 | { |
||
929 | memset(ei_local->mcfilter, 0, 8); |
||
930 | if (dev->mc_list) |
||
931 | make_mc_bits(ei_local->mcfilter, dev); |
||
932 | } |
||
933 | else |
||
934 | memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */ |
||
935 | |||
936 | /* |
||
937 | * DP8390 manuals don't specify any magic sequence for altering |
||
938 | * the multicast regs on an already running card. To be safe, we |
||
939 | * ensure multicast mode is off prior to loading up the new hash |
||
940 | * table. If this proves to be not enough, we can always resort |
||
941 | * to stopping the NIC, loading the table and then restarting. |
||
942 | * |
||
943 | * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC |
||
944 | * Elite16) appear to be write-only. The NS 8390 data sheet lists |
||
945 | * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and |
||
946 | * Ultra32 EISA) appears to have this bug fixed. |
||
947 | */ |
||
948 | |||
949 | if (dev->start) |
||
950 | outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); |
||
951 | outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); |
||
952 | for(i = 0; i < 8; i++) |
||
953 | { |
||
954 | outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); |
||
955 | #ifndef BUG_83C690 |
||
956 | if(inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i]) |
||
957 | printk(KERN_ERR "Multicast filter read/write mismap %d\n",i); |
||
958 | #endif |
||
959 | } |
||
960 | outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); |
||
961 | |||
962 | if(dev->flags&IFF_PROMISC) |
||
963 | outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR); |
||
964 | else if(dev->flags&IFF_ALLMULTI || dev->mc_list) |
||
965 | outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR); |
||
966 | else |
||
967 | outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); |
||
968 | } |
||
969 | |||
970 | /* |
||
971 | * Called without lock held. This is invoked from user context and may |
||
972 | * be parallel to just about everything else. Its also fairly quick and |
||
973 | * not called too often. Must protect against both bh and irq users |
||
974 | */ |
||
975 | |||
976 | static void set_multicast_list(struct device *dev) |
||
977 | { |
||
978 | unsigned long flags; |
||
979 | struct ei_device *ei_local = (struct ei_device*)dev->priv; |
||
980 | |||
981 | spin_lock_irqsave(&ei_local->page_lock, flags); |
||
982 | do_set_multicast_list(dev); |
||
983 | spin_unlock_irqrestore(&ei_local->page_lock, flags); |
||
984 | } |
||
985 | |||
986 | /* |
||
987 | * Initialize the rest of the 8390 device structure. Do NOT __initfunc |
||
988 | * this, as it is used by 8390 based modular drivers too. |
||
989 | */ |
||
990 | |||
991 | int ethdev_init(struct device *dev) |
||
992 | { |
||
993 | if (ei_debug > 1) |
||
994 | printk(version); |
||
995 | |||
996 | if (dev->priv == NULL) |
||
997 | { |
||
998 | struct ei_device *ei_local; |
||
999 | |||
1000 | dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL); |
||
1001 | if (dev->priv == NULL) |
||
1002 | return -ENOMEM; |
||
1003 | memset(dev->priv, 0, sizeof(struct ei_device)); |
||
1004 | ei_local = (struct ei_device *)dev->priv; |
||
1005 | spin_lock_init(&ei_local->page_lock); |
||
1006 | } |
||
1007 | |||
1008 | dev->hard_start_xmit = &ei_start_xmit; |
||
1009 | dev->get_stats = get_stats; |
||
1010 | dev->set_multicast_list = &set_multicast_list; |
||
1011 | |||
1012 | ether_setup(dev); |
||
1013 | |||
1014 | return 0; |
||
1015 | } |
||
1016 | |||
1017 | |||
1018 | |||
1019 | /* This page of functions should be 8390 generic */ |
||
1020 | /* Follow National Semi's recommendations for initializing the "NIC". */ |
||
1021 | |||
1022 | /* |
||
1023 | * Must be called with lock held. |
||
1024 | */ |
||
1025 | |||
1026 | void NS8390_init(struct device *dev, int startp) |
||
1027 | { |
||
1028 | long e8390_base = dev->base_addr; |
||
1029 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
1030 | int i; |
||
1031 | int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; |
||
1032 | |||
1033 | if(sizeof(struct e8390_pkt_hdr)!=4) |
||
1034 | panic("8390.c: header struct mispacked\n"); |
||
1035 | /* Follow National Semi's recommendations for initing the DP83902. */ |
||
1036 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ |
||
1037 | outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ |
||
1038 | /* Clear the remote byte count registers. */ |
||
1039 | outb_p(0x00, e8390_base + EN0_RCNTLO); |
||
1040 | outb_p(0x00, e8390_base + EN0_RCNTHI); |
||
1041 | /* Set to monitor and loopback mode -- this is vital!. */ |
||
1042 | outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */ |
||
1043 | outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ |
||
1044 | /* Set the transmit page and receive ring. */ |
||
1045 | outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); |
||
1046 | ei_local->tx1 = ei_local->tx2 = 0; |
||
1047 | outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); |
||
1048 | outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ |
||
1049 | ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ |
||
1050 | outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); |
||
1051 | /* Clear the pending interrupts and mask. */ |
||
1052 | outb_p(0xFF, e8390_base + EN0_ISR); |
||
1053 | outb_p(0x00, e8390_base + EN0_IMR); |
||
1054 | |||
1055 | /* Copy the station address into the DS8390 registers. */ |
||
1056 | |||
1057 | outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ |
||
1058 | for(i = 0; i < 6; i++) |
||
1059 | { |
||
1060 | outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); |
||
1061 | if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) |
||
1062 | if (ei_debug > 0) |
||
1063 | printk(KERN_ERR "Hw. address read/write mismap %d\n",i); |
||
1064 | } |
||
1065 | |||
1066 | outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); |
||
1067 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); |
||
1068 | |||
1069 | dev->tbusy = 0; |
||
1070 | dev->interrupt = 0; |
||
1071 | ei_local->tx1 = ei_local->tx2 = 0; |
||
1072 | ei_local->txing = 0; |
||
1073 | |||
1074 | if (startp) |
||
1075 | { |
||
1076 | outb_p(0xff, e8390_base + EN0_ISR); |
||
1077 | outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
||
1078 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); |
||
1079 | outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */ |
||
1080 | /* 3c503 TechMan says rxconfig only after the NIC is started. */ |
||
1081 | outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */ |
||
1082 | do_set_multicast_list(dev); /* (re)load the mcast table */ |
||
1083 | } |
||
1084 | return; |
||
1085 | } |
||
1086 | |||
1087 | /* Trigger a transmit start, assuming the length is valid. |
||
1088 | Always called with the page lock held */ |
||
1089 | |||
1090 | static void NS8390_trigger_send(struct device *dev, unsigned int length, |
||
1091 | int start_page) |
||
1092 | { |
||
1093 | long e8390_base = dev->base_addr; |
||
1094 | struct ei_device *ei_local = (struct ei_device *) dev->priv; |
||
1095 | |||
1096 | outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD); |
||
1097 | |||
1098 | if (inb_p(e8390_base) & E8390_TRANS) |
||
1099 | { |
||
1100 | printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n", |
||
1101 | dev->name); |
||
1102 | return; |
||
1103 | } |
||
1104 | outb_p(length & 0xff, e8390_base + EN0_TCNTLO); |
||
1105 | outb_p(length >> 8, e8390_base + EN0_TCNTHI); |
||
1106 | outb_p(start_page, e8390_base + EN0_TPSR); |
||
1107 | outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); |
||
1108 | } |
||
1109 | |||
1110 | #ifdef MODULE |
||
1111 | |||
1112 | EXPORT_SYMBOL(ei_open); |
||
1113 | EXPORT_SYMBOL(ei_close); |
||
1114 | EXPORT_SYMBOL(ei_interrupt); |
||
1115 | EXPORT_SYMBOL(ethdev_init); |
||
1116 | EXPORT_SYMBOL(NS8390_init); |
||
1117 | |||
1118 | struct module *NS8390_module = NULL; |
||
1119 | |||
1120 | int init_module(void) |
||
1121 | { |
||
1122 | NS8390_module = &__this_module; |
||
1123 | return 0; |
||
1124 | } |
||
1125 | |||
1126 | void cleanup_module(void) |
||
1127 | { |
||
1128 | NS8390_module = NULL; |
||
1129 | } |
||
1130 | |||
1131 | #endif /* MODULE */ |
||
1132 | |||
1133 | /* |
||
1134 | * Local variables: |
||
1135 | * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 8390.c" |
||
1136 | * version-control: t |
||
1137 | * kept-new-versions: 5 |
||
1138 | * c-indent-level: 4 |
||
1139 | * tab-width: 4 |
||
1140 | * End: |
||
1141 | */ |