{"id":60389,"date":"2026-01-15T14:57:27","date_gmt":"2026-01-15T06:57:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/60389.html"},"modified":"2026-01-15T14:57:27","modified_gmt":"2026-01-15T06:57:27","slug":"%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90%e7%bd%91%e5%8d%a1%e9%a9%b1%e5%8a%a8%e5%bc%80%e5%8f%91%e4%b8%8e%e7%a7%bb%e6%a4%8d","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/60389.html","title":{"rendered":"\u6df1\u5165\u89e3\u6790\u7f51\u5361\u9a71\u52a8\u5f00\u53d1\u4e0e\u79fb\u690d"},"content":{"rendered":"<h2>\u7f51\u5361\u9a71\u52a8\u7684\u539f\u7406\u3001\u5f00\u53d1\u3001\u9002\u914d\u4e0e\u79fb\u690d\u8be6\u89e3&#xff08;CSDN\u6280\u672f\u6df1\u5ea6\u89e3\u6790&#xff09;<\/h2>\n<p>\u4f5c\u8005&#xff1a; \u6280\u672f\u63a2\u7d22\u8005 \u53d1\u5e03\u65f6\u95f4&#xff1a; 2024\u5e746\u6708 \u6807\u7b7e&#xff1a; Linux\u9a71\u52a8\u5f00\u53d1&#xff5c;\u7f51\u5361\u9a71\u52a8&#xff5c;\u8bbe\u5907\u6811&#xff5c;\u5185\u6838\u6a21\u5757&#xff5c;\u5d4c\u5165\u5f0f\u7cfb\u7edf<\/p>\n<hr \/>\n<h3>\u5f15\u8a00<\/h3>\n<p>\u5728\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\u4e2d&#xff0c;\u7f51\u7edc\u901a\u4fe1\u662f\u6838\u5fc3\u529f\u80fd\u4e4b\u4e00\u3002\u800c\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1\u7684\u57fa\u7840&#xff0c;\u6b63\u662f\u7f51\u5361\u9a71\u52a8\u7a0b\u5e8f&#xff08;Network Interface Card Driver, NIC Driver&#xff09;\u3002\u5b83\u4f5c\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u4e0e\u7269\u7406\u7f51\u7edc\u786c\u4ef6\u4e4b\u95f4\u7684\u6865\u6881&#xff0c;\u8d1f\u8d23\u6570\u636e\u5305\u7684\u6536\u53d1\u3001\u4e2d\u65ad\u5904\u7406\u3001DMA\u4f20\u8f93\u7b49\u5173\u952e\u4efb\u52a1\u3002<\/p>\n<p>\u672c\u6587\u5c06\u6df1\u5165\u5256\u6790\u7f51\u5361\u9a71\u52a8\u7684\u5de5\u4f5c\u539f\u7406&#xff0c;\u8be6\u7ec6\u4ecb\u7ecd\u5176\u5728Linux\u7cfb\u7edf\u4e2d\u7684\u5f00\u53d1\u6d41\u7a0b\u3001\u9002\u914d\u65b9\u6cd5\u53ca\u8de8\u5e73\u53f0\u79fb\u690d\u6280\u5de7&#xff0c;\u5e76\u7ed3\u5408\u771f\u5b9e\u4ee3\u7801\u793a\u4f8b\u8fdb\u884c\u8bb2\u89e3&#xff0c;\u5e2e\u52a9\u5f00\u53d1\u8005\u5168\u9762\u638c\u63e1\u7f51\u5361\u9a71\u52a8\u4ece\u96f6\u5230\u4e00\u7684\u6784\u5efa\u8fc7\u7a0b\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u7f51\u5361\u9a71\u52a8\u7684\u57fa\u672c\u539f\u7406<\/h3>\n<h4>1.1 \u7f51\u5361\u9a71\u52a8\u7684\u4f5c\u7528<\/h4>\n<p>\u7f51\u5361\u9a71\u52a8\u7684\u4e3b\u8981\u804c\u8d23\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u521d\u59cb\u5316\u786c\u4ef6&#xff1a;\u914d\u7f6eMAC\u5730\u5740\u3001\u8bbe\u7f6e\u5de5\u4f5c\u6a21\u5f0f&#xff08;\u5168\u53cc\u5de5\/\u534a\u53cc\u5de5&#xff09;\u3001\u901f\u7387\u534f\u5546\u7b49\u3002<\/li>\n<li>\u7ba1\u7406\u6570\u636e\u6536\u53d1&#xff1a;\n<ul>\n<li>\u53d1\u9001\u6570\u636e\u65f6&#xff0c;\u5c06\u4e0a\u5c42\u534f\u8bae\u6808\u7684\u6570\u636e\u5c01\u88c5\u6210\u5e27\u5e76\u5199\u5165\u7f51\u5361\u5bc4\u5b58\u5668\u6216DMA\u7f13\u51b2\u533a&#xff1b;<\/li>\n<li>\u63a5\u6536\u6570\u636e\u65f6&#xff0c;\u4ece\u786c\u4ef6\u8bfb\u53d6\u4ee5\u592a\u7f51\u5e27&#xff0c;\u5265\u79bb\u5934\u90e8\u540e\u63d0\u4ea4\u7ed9\u4e0a\u5c42\u534f\u8bae\u6808&#xff08;\u5982IP\u5c42&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u4e2d\u65ad\u5904\u7406&#xff1a;\u54cd\u5e94\u6570\u636e\u5230\u8fbe\u3001\u53d1\u9001\u5b8c\u6210\u3001\u9519\u8bef\u72b6\u6001\u7b49\u4e2d\u65ad\u4e8b\u4ef6\u3002<\/li>\n<li>DMA\u63a7\u5236&#xff1a;\u5229\u7528\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\u673a\u5236\u9ad8\u6548\u4f20\u8f93\u5927\u91cf\u6570\u636e&#xff0c;\u51cf\u5c11CPU\u8d1f\u62c5\u3002<\/li>\n<li>\u7535\u6e90\u7ba1\u7406\u4e0e\u70ed\u63d2\u62d4\u652f\u6301&#xff1a;\u652f\u6301Suspend\/Resume\u3001\u52a8\u6001\u529f\u8017\u8c03\u8282\u7b49\u529f\u80fd\u3002<\/li>\n<\/ul>\n<h4>1.2 \u9a71\u52a8\u5728\u5185\u6838\u4e2d\u7684\u4f4d\u7f6e<\/h4>\n<p>Linux\u7f51\u7edc\u5b50\u7cfb\u7edf\u91c7\u7528\u5206\u5c42\u67b6\u6784&#xff1a;<\/p>\n<p>[\u5e94\u7528\u5c42] \u2192 socket()<br \/>\n     \u2193<br \/>\n[\u534f\u8bae\u6808\u5c42] \u2192 TCP\/IP (inet_protos)<br \/>\n     \u2193<br \/>\n[\u7f51\u7edc\u8bbe\u5907\u5c42] \u2192 struct net_device &#xff08;\u6838\u5fc3\u7ed3\u6784\u4f53&#xff09;<br \/>\n     \u2193<br \/>\n[\u7f51\u5361\u9a71\u52a8\u5c42] \u2192 \u9a71\u52a8\u5b9e\u73b0 open(), xmit(), interrupt() \u7b49\u56de\u8c03\u51fd\u6570<br \/>\n     \u2193<br \/>\n[\u7269\u7406\u786c\u4ef6] \u2192 PHY &#043; MAC \u63a7\u5236\u5668&#xff08;\u5982 RTL8139\u3001e1000\u3001DM9000&#xff09;<\/p>\n<p>\u5176\u4e2d struct net_device \u662f\u6240\u6709\u7f51\u7edc\u63a5\u53e3\u7684\u6838\u5fc3\u62bd\u8c61&#xff0c;\u7531\u9a71\u52a8\u6ce8\u518c\u5e76\u5411\u5185\u6838\u63d0\u4f9b\u64cd\u4f5c\u63a5\u53e3\u3002<\/p>\n<hr \/>\n<h3>\u4e8c\u3001Linux\u7f51\u5361\u9a71\u52a8\u5f00\u53d1\u8be6\u89e3<\/h3>\n<p>\u6211\u4eec\u4ee5\u4e00\u4e2a\u5178\u578b\u7684\u5d4c\u5165\u5f0f\u5e73\u53f0&#xff08;\u57fa\u4e8eARM&#043;SMSC LAN9220\u82af\u7247&#xff09;\u4e3a\u4f8b&#xff0c;\u8bf4\u660e\u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u5e73\u53f0\u7f51\u5361\u9a71\u52a8\u3002<\/p>\n<h4>2.1 \u5f00\u53d1\u73af\u5883\u51c6\u5907<\/h4>\n<ul>\n<li>\u4e3b\u673a\u7cfb\u7edf&#xff1a;Ubuntu 20.04<\/li>\n<li>\u76ee\u6807\u5e73\u53f0&#xff1a;ARM Cortex-A9&#xff08;Zynq&#xff09;<\/li>\n<li>\u5185\u6838\u7248\u672c&#xff1a;Linux 5.10<\/li>\n<li>\u7f16\u8bd1\u5de5\u5177\u94fe&#xff1a;arm-linux-gnueabihf-gcc<\/li>\n<li>\u5f00\u53d1\u65b9\u5f0f&#xff1a;\u6a21\u5757\u5316\u7f16\u8bd1&#xff08;insmod\u52a0\u8f7d&#xff09;<\/li>\n<\/ul>\n<h4>2.2 \u6838\u5fc3\u6570\u636e\u7ed3\u6784\u4ecb\u7ecd<\/h4>\n<h5>struct net_device<\/h5>\n<p>\u8fd9\u662f\u6bcf\u4e2a\u7f51\u7edc\u63a5\u53e3\u7684\u4ee3\u8868&#xff0c;\u5305\u542b\u5982\u4e0b\u91cd\u8981\u5b57\u6bb5&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> name<span class=\"token punctuation\">[<\/span>IFNAMSIZ<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u63a5\u53e3\u540d&#xff0c;\u5982 eth0<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device_ops<\/span> <span class=\"token operator\">*<\/span>netdev_ops<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u64cd\u4f5c\u51fd\u6570\u96c6<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> state<span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">\/\/ \u72b6\u6001\u6807\u5fd7&#xff08;UP\/DOWN\u7b49&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> flags<span class=\"token punctuation\">;<\/span>             <span class=\"token comment\">\/\/ IFF_UP, IFF_BROADCAST \u7b49<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device_stats<\/span> stats<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7edf\u8ba1\u4fe1\u606f&#xff08;\u6536\u53d1\u5305\u6570\u3001\u9519\u8bef\u7b49&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>priv<span class=\"token punctuation\">;<\/span>                     <span class=\"token comment\">\/\/ \u79c1\u6709\u6570\u636e\u6307\u9488&#xff08;\u5e38\u7528\u4e8e\u4fdd\u5b58\u9a71\u52a8\u4e0a\u4e0b\u6587&#xff09;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h5>struct net_device_ops<\/h5>\n<p>\u5b9a\u4e49\u9a71\u52a8\u63d0\u4f9b\u7684\u529f\u80fd\u51fd\u6570&#xff1a;<\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device_ops<\/span> smsc_netdev_ops <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>ndo_open        <span class=\"token operator\">&#061;<\/span> smsc_open<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>ndo_stop        <span class=\"token operator\">&#061;<\/span> smsc_close<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>ndo_start_xmit  <span class=\"token operator\">&#061;<\/span> smsc_hard_start_xmit<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>ndo_set_mac_address <span class=\"token operator\">&#061;<\/span> smsc_set_mac_address<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>ndo_get_stats   <span class=\"token operator\">&#061;<\/span> smsc_get_stats<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h4>2.3 \u793a\u4f8b\u9a71\u52a8\u4ee3\u7801\u6846\u67b6&#xff08;\u7b80\u5316\u7248&#xff09;<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/module.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/netdevice.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/etherdevice.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/skbuff.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/interrupt.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/io.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u79c1\u6709\u6570\u636e\u7ed3\u6784<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> __iomem <span class=\"token operator\">*<\/span>base<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> irq<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6253\u5f00\u8bbe\u5907<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">smsc_open<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token operator\">*<\/span>lp <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_priv<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6620\u5c04I\/O\u5185\u5b58\u3001\u7533\u8bf7\u4e2d\u65ad<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">request_mem_region<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base_phys<span class=\"token punctuation\">,<\/span> SZ_64K<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;smsc9220&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>EBUSY<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">ioremap<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base_phys<span class=\"token punctuation\">,<\/span> SZ_64K<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>lp<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>ENOMEM<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">request_irq<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>irq<span class=\"token punctuation\">,<\/span> smsc_interrupt<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> dev<span class=\"token operator\">-&gt;<\/span>name<span class=\"token punctuation\">,<\/span> dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">iounmap<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">release_mem_region<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base_phys<span class=\"token punctuation\">,<\/span> SZ_64K<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>EAGAIN<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u542f\u52a8\u786c\u4ef6&#xff08;\u4f2a\u4ee3\u7801&#xff09;<\/span><br \/>\n    <span class=\"token function\">writel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0x1<\/span><span class=\"token punctuation\">,<\/span> lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_MAC_ENABLE<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">netif_start_queue<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printk<\/span><span class=\"token punctuation\">(<\/span>KERN_INFO <span class=\"token string\">&#034;%s: device opened\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> dev<span class=\"token operator\">-&gt;<\/span>name<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u53d1\u9001\u6570\u636e\u5305<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token class-name\">netdev_tx_t<\/span> <span class=\"token function\">smsc_hard_start_xmit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sk_buff<\/span> <span class=\"token operator\">*<\/span>skb<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token operator\">*<\/span>lp <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_priv<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5c06skb\u6570\u636e\u5199\u5165\u786c\u4ef6TX FIFO&#xff08;\u6b64\u5904\u4e3a\u7b80\u5316\u903b\u8f91&#xff09;<\/span><br \/>\n    <span class=\"token function\">memcpy_toio<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> TX_FIFO<span class=\"token punctuation\">,<\/span> skb<span class=\"token operator\">-&gt;<\/span>data<span class=\"token punctuation\">,<\/span> skb<span class=\"token operator\">-&gt;<\/span>len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u89e6\u53d1\u53d1\u9001<\/span><br \/>\n    <span class=\"token function\">writel<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token operator\">-&gt;<\/span>len<span class=\"token punctuation\">,<\/span> lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_TX_LENGTH<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">writel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0x1<\/span><span class=\"token punctuation\">,<\/span> lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_TX_START<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91ca\u653eskb<\/span><br \/>\n    <span class=\"token function\">dev_kfree_skb<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u66f4\u65b0\u7edf\u8ba1<\/span><br \/>\n    dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">.<\/span>tx_packets<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">.<\/span>tx_bytes <span class=\"token operator\">&#043;&#061;<\/span> skb<span class=\"token operator\">-&gt;<\/span>len<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> NETDEV_TX_OK<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4e2d\u65ad\u5904\u7406\u51fd\u6570<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token class-name\">irqreturn_t<\/span> <span class=\"token function\">smsc_interrupt<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> irq<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>dev_id<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>dev_id<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token operator\">*<\/span>lp <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_priv<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    u32 intr_status<span class=\"token punctuation\">;<\/span><\/p>\n<p>    intr_status <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">readl<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_INT_STS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>intr_status <span class=\"token operator\">&amp;<\/span> INT_RX<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">smsc_rx<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8c03\u7528\u63a5\u6536\u5904\u7406<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>intr_status <span class=\"token operator\">&amp;<\/span> INT_TX<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">.<\/span>tx_packets<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">netif_wake_queue<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> IRQ_HANDLED<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u63a5\u6536\u6570\u636e\u5305\u5904\u7406<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">smsc_rx<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token operator\">*<\/span>lp <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_priv<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    u32 rx_status<span class=\"token punctuation\">,<\/span> rx_len<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sk_buff<\/span> <span class=\"token operator\">*<\/span>skb<span class=\"token punctuation\">;<\/span><\/p>\n<p>    rx_status <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">readl<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_RX_STATUS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span>rx_status <span class=\"token operator\">&amp;<\/span> RX_EOP<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    rx_len <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">readl<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_RX_LENGTH<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&amp;<\/span> <span class=\"token number\">0xFFFF<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    skb <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_alloc_skb<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">,<\/span> rx_len <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>skb<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">.<\/span>rx_dropped<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">skb_reserve<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">memcpy_fromio<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token operator\">-&gt;<\/span>data<span class=\"token punctuation\">,<\/span> lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> RX_FIFO<span class=\"token punctuation\">,<\/span> rx_len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">skb_put<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token punctuation\">,<\/span> rx_len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    skb<span class=\"token operator\">-&gt;<\/span>protocol <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">eth_type_trans<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token punctuation\">,<\/span> dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">netif_rx<\/span><span class=\"token punctuation\">(<\/span>skb<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u63d0\u4ea4\u5230\u4e0a\u5c42\u534f\u8bae\u6808<\/span><\/p>\n<p>    dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">.<\/span>rx_packets<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">.<\/span>rx_bytes <span class=\"token operator\">&#043;&#061;<\/span> rx_len<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5173\u95ed\u8bbe\u5907<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">smsc_close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token operator\">*<\/span>lp <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_priv<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">netif_stop_queue<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">writel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0x0<\/span><span class=\"token punctuation\">,<\/span> lp<span class=\"token operator\">-&gt;<\/span>base <span class=\"token operator\">&#043;<\/span> REG_MAC_ENABLE<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">free_irq<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>irq<span class=\"token punctuation\">,<\/span> dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">iounmap<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">release_mem_region<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>base_phys<span class=\"token punctuation\">,<\/span> SZ_64K<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8bbe\u7f6eMAC\u5730\u5740<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">smsc_set_mac_address<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">sockaddr<\/span> <span class=\"token operator\">*<\/span>addr <span class=\"token operator\">&#061;<\/span> p<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token function\">is_valid_ether_addr<\/span><span class=\"token punctuation\">(<\/span>addr<span class=\"token operator\">-&gt;<\/span>sa_data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>EADDRNOTAVAIL<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">eth_hw_addr_set<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">,<\/span> addr<span class=\"token operator\">-&gt;<\/span>sa_data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u83b7\u53d6\u7edf\u8ba1\u4fe1\u606f<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device_stats<\/span> <span class=\"token operator\">*<\/span><span class=\"token function\">smsc_get_stats<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&amp;<\/span>dev<span class=\"token operator\">-&gt;<\/span>stats<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2.4 \u9a71\u52a8\u6ce8\u518c\u4e0e\u5378\u8f7d<\/h4>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> __init <span class=\"token function\">smsc_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">net_device<\/span> <span class=\"token operator\">*<\/span>dev<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span> <span class=\"token operator\">*<\/span>lp<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> ret<span class=\"token punctuation\">;<\/span><\/p>\n<p>    dev <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">alloc_etherdev<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">smsc_local<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>dev<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>ENOMEM<span class=\"token punctuation\">;<\/span><\/p>\n<p>    lp <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">netdev_priv<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">ether_setup<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u521d\u59cb\u5316\u786c\u4ef6\u8d44\u6e90&#xff08;\u6839\u636e\u8bbe\u5907\u6811\u83b7\u53d6&#xff09;<\/span><br \/>\n    lp<span class=\"token operator\">-&gt;<\/span>base_phys <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x40000000<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    lp<span class=\"token operator\">-&gt;<\/span>irq <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">57<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    lp<span class=\"token operator\">-&gt;<\/span>dev <span class=\"token operator\">&#061;<\/span> dev<span class=\"token punctuation\">;<\/span><\/p>\n<p>    dev<span class=\"token operator\">-&gt;<\/span>netdev_ops <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>smsc_netdev_ops<span class=\"token punctuation\">;<\/span><br \/>\n    dev<span class=\"token operator\">-&gt;<\/span>watchdog_timeo <span class=\"token operator\">&#061;<\/span> HZ<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8d85\u65f6\u65f6\u95f4<\/span><\/p>\n<p>    ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">register_netdev<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">free_netdev<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> ret<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">printk<\/span><span class=\"token punctuation\">(<\/span>KERN_INFO <span class=\"token string\">&#034;SMSC LAN9220 driver loaded\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> __exit <span class=\"token function\">smsc_exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">unregister_netdev<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">free_netdev<\/span><span class=\"token punctuation\">(<\/span>lp<span class=\"token operator\">-&gt;<\/span>dev<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printk<\/span><span class=\"token punctuation\">(<\/span>KERN_INFO <span class=\"token string\">&#034;SMSC driver unloaded\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">module_init<\/span><span class=\"token punctuation\">(<\/span>smsc_init<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">module_exit<\/span><span class=\"token punctuation\">(<\/span>smsc_exit<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">MODULE_LICENSE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;GPL&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MODULE_AUTHOR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Your Name&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MODULE_DESCRIPTION<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Simple SMSC LAN9220 Network Driver&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u4e09\u3001\u8bbe\u5907\u6811\u9002\u914d&#xff08;Device Tree&#xff09;<\/h3>\n<p>\u5bf9\u4e8e\u73b0\u4ee3\u5d4c\u5165\u5f0fLinux\u7cfb\u7edf&#xff0c;\u786c\u4ef6\u8d44\u6e90\u914d\u7f6e\u901a\u8fc7\u8bbe\u5907\u6811\u4f20\u9012\u3002<\/p>\n<h4>\u8bbe\u5907\u6811\u8282\u70b9\u793a\u4f8b&#xff08;.dtsi \u6587\u4ef6&#xff09;&#xff1a;<\/h4>\n<p>&amp;axi {<br \/>\n    smsc: ethernet&#064;40000000 {<br \/>\n        compatible &#061; &#034;smsc,lan9220&#034;;<br \/>\n        reg &#061; &lt;0x40000000 0x10000&gt;;<br \/>\n        interrupts &#061; &lt;0 57 4&gt;; \/* IRQ_TYPE_LEVEL_HIGH *\/<br \/>\n        interrupt-parent &#061; &lt;&amp;gic&gt;;<br \/>\n        phy-mode &#061; &#034;mii&#034;;<br \/>\n        status &#061; &#034;okay&#034;;<br \/>\n    };<br \/>\n};<\/p>\n<h4>\u9a71\u52a8\u4e2d\u4f7f\u7528 OF \u5339\u914d&#xff1a;<\/h4>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">of_device_id<\/span> smsc_of_match<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">.<\/span>compatible <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;smsc,lan9220&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* sentinel *\/<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">MODULE_DEVICE_TABLE<\/span><span class=\"token punctuation\">(<\/span>of<span class=\"token punctuation\">,<\/span> smsc_of_match<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">static<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">platform_driver<\/span> smsc_platform_driver <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>probe <span class=\"token operator\">&#061;<\/span> smsc_probe<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>remove <span class=\"token operator\">&#061;<\/span> smsc_remove<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>driver <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;smsc9220&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span>of_match_table <span class=\"token operator\">&#061;<\/span> smsc_of_match<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">module_platform_driver<\/span><span class=\"token punctuation\">(<\/span>smsc_platform_driver<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5728 probe() \u51fd\u6570\u4e2d\u4f7f\u7528 of_iomap() \u548c irq_of_parse_and_map() \u81ea\u52a8\u83b7\u53d6\u8d44\u6e90\u3002<\/p>\n<hr \/>\n<h3>\u56db\u3001\u9a71\u52a8\u79fb\u690d\u7684\u5173\u952e\u6b65\u9aa4<\/h3>\n<p>\u5f53\u4f60\u9700\u8981\u5c06\u7f51\u5361\u9a71\u52a8\u4ece\u4e00\u4e2a\u5e73\u53f0\u8fc1\u79fb\u5230\u53e6\u4e00\u4e2a\u5e73\u53f0\u65f6&#xff0c;\u9700\u5173\u6ce8\u4ee5\u4e0b\u51e0\u70b9&#xff1a;<\/p>\n<h4>4.1 \u786c\u4ef6\u5dee\u5f02\u5206\u6790<\/h4>\n<table>\n<tr>\u5dee\u5f02\u70b9\u5f71\u54cd<\/tr>\n<tbody>\n<tr>\n<td>\u603b\u7ebf\u7c7b\u578b&#xff08;PCI\/Platform\/SPI&#xff09;<\/td>\n<td>\u5bc4\u5b58\u5668\u8bbf\u95ee\u65b9\u5f0f\u4e0d\u540c<\/td>\n<\/tr>\n<tr>\n<td>\u5730\u5740\u6620\u5c04\u65b9\u5f0f<\/td>\n<td>\u662f\u5426\u9700\u8981 ioremap<\/td>\n<\/tr>\n<tr>\n<td>\u4e2d\u65ad\u63a7\u5236\u5668<\/td>\n<td>GIC vs IO-APIC<\/td>\n<\/tr>\n<tr>\n<td>PHY\u8fde\u63a5\u65b9\u5f0f&#xff08;MII\/RMII\/GMII&#xff09;<\/td>\n<td>\u9700\u8981\u914d\u7f6e\u6b63\u786e\u7684phy-mode<\/td>\n<\/tr>\n<tr>\n<td>\u65f6\u949f\u4e0e\u590d\u4f4d\u63a7\u5236<\/td>\n<td>\u53ef\u80fd\u9700\u8c03\u7528 clk_prepare_enable()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>4.2 \u4fee\u6539\u70b9\u6e05\u5355<\/h4>\n<li>\u4fee\u6539\u8d44\u6e90\u83b7\u53d6\u65b9\u5f0f&#xff1a;\u7531\u56fa\u5b9a\u5730\u5740\u6539\u4e3a\u8bbe\u5907\u6811\u89e3\u6790\u3002<\/li>\n<li>\u8c03\u6574IO\u8bbf\u95ee\u51fd\u6570&#xff1a;readl\/writel \u6216 inb\/outb\u3002<\/li>\n<li>\u9002\u914dPHY\u5b50\u7cfb\u7edf&#xff1a;\u4f7f\u7528 phy_connect() \u63a5\u5165\u6807\u51c6PHY\u5c42\u3002<\/li>\n<li>\u7535\u6e90\u7ba1\u7406\u8865\u5168&#xff1a;\u6dfb\u52a0 .suspend\/.resume \u56de\u8c03\u3002<\/li>\n<li>DMA\u7f13\u51b2\u533a\u5bf9\u9f50&#xff1a;\u786e\u4fdd\u7f13\u5b58\u4e00\u81f4\u6027&#xff08;\u5c24\u5176ARM\u67b6\u6784&#xff09;\u3002<\/li>\n<h4>4.3 \u4f7f\u7528\u6807\u51c6PHY\u6846\u67b6&#xff08;\u63a8\u8350\u505a\u6cd5&#xff09;<\/h4>\n<p>\u4e0d\u8981\u81ea\u5df1\u5b9e\u73b0MDIO\u8bfb\u5199&#xff01;\u5e94\u4f7f\u7528\u5185\u6838\u7684 phylib \u6846\u67b6&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/phy.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5728 probe \u4e2d\u8fde\u63a5 PHY<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">phy_device<\/span> <span class=\"token operator\">*<\/span>phydev<span class=\"token punctuation\">;<\/span><br \/>\nphydev <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">phy_find_first<\/span><span class=\"token punctuation\">(<\/span>priv<span class=\"token operator\">-&gt;<\/span>mii_bus<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>phydev<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token operator\">&#8211;<\/span>ENODEV<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">phy_connect<\/span><span class=\"token punctuation\">(<\/span>dev<span class=\"token punctuation\">,<\/span> phydev<span class=\"token operator\">-&gt;<\/span>attached_dev<span class=\"token punctuation\">.<\/span>phy<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>smsc_adjust_link<span class=\"token punctuation\">,<\/span> PHY_INTERFACE_MODE_MII<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd9\u6837\u53ef\u4ee5\u81ea\u52a8\u5904\u7406\u81ea\u534f\u5546\u3001\u94fe\u8def\u72b6\u6001\u76d1\u63a7\u3001\u901f\u7387\u5207\u6362\u7b49\u95ee\u9898\u3002<\/p>\n<hr \/>\n<h3>\u4e94\u3001\u8c03\u8bd5\u6280\u5de7\u4e0e\u5e38\u89c1\u95ee\u9898<\/h3>\n<h4>5.1 \u5e38\u89c1\u95ee\u9898\u6392\u67e5<\/h4>\n<table>\n<tr>\u73b0\u8c61\u53ef\u80fd\u539f\u56e0\u89e3\u51b3\u65b9\u6848<\/tr>\n<tbody>\n<tr>\n<td>ifconfig eth0 up \u5931\u8d25<\/td>\n<td>ndo_open \u8fd4\u56de\u975e0<\/td>\n<td>\u68c0\u67e5\u8d44\u6e90\u7533\u8bf7\u662f\u5426\u6210\u529f<\/td>\n<\/tr>\n<tr>\n<td>\u65e0\u6cd5\u83b7\u53d6IP&#xff08;DHCP\u8d85\u65f6&#xff09;<\/td>\n<td>MAC\u672a\u6b63\u786e\u8bbe\u7f6e<\/td>\n<td>\u4f7f\u7528\u968f\u673aMAC\u6216\u70e7\u5f55\u552f\u4e00MAC<\/td>\n<\/tr>\n<tr>\n<td>\u6536\u4e0d\u5230\u5305\u4f46\u80fdping\u901a\u672c\u5730<\/td>\n<td>\u4e2d\u65ad\u672a\u89e6\u53d1<\/td>\n<td>\u68c0\u67e5IRQ\u53f7\u3001\u7535\u5e73\u914d\u7f6e<\/td>\n<\/tr>\n<tr>\n<td>\u53d1\u5305\u4e22\u5f03&#xff08;tx_dropped &gt; 0&#xff09;<\/td>\n<td>TX\u961f\u5217\u6ee1\u672a\u5524\u9192<\/td>\n<td>\u68c0\u67e5 netif_wake_queue() \u8c03\u7528\u65f6\u673a<\/td>\n<\/tr>\n<tr>\n<td>\u5185\u6838\u5d29\u6e83&#xff08;Oops&#xff09;<\/td>\n<td>\u7a7a\u6307\u9488\u89e3\u5f15\u7528<\/td>\n<td>\u4f7f\u7528 netdev_priv() \u524d\u786e\u8ba4\u5206\u914d\u6210\u529f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>5.2 \u8c03\u8bd5\u624b\u6bb5<\/h4>\n<ul>\n<li>\u4f7f\u7528 printk() \u8f93\u51fa\u5173\u952e\u6d41\u7a0b&#xff08;\u5efa\u8bae\u7528 netdev_info\/dev_err&#xff09;<\/li>\n<li>\u5229\u7528 ethtool \u67e5\u770b\u9a71\u52a8\u72b6\u6001&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token function\">ethtool<\/span> eth0          <span class=\"token comment\"># \u67e5\u770b\u57fa\u672c\u4fe1\u606f<\/span><br \/>\n<span class=\"token function\">ethtool<\/span> -i eth0       <span class=\"token comment\"># \u67e5\u770b\u9a71\u52a8\u7248\u672c<\/span><br \/>\n<span class=\"token function\">ethtool<\/span> -S eth0       <span class=\"token comment\"># \u67e5\u770b\u7edf\u8ba1\u8ba1\u6570<\/span><\/p>\n<ul>\n<li>\u4f7f\u7528 tcpdump \u9a8c\u8bc1\u6570\u636e\u901a\u8def&#xff1a;<\/li>\n<\/ul>\n<p>tcpdump -i eth0 -n<\/p>\n<ul>\n<li>\u5185\u6838\u914d\u7f6e\u5f00\u542f\u7f51\u7edc\u8c03\u8bd5\u9009\u9879&#xff1a;<\/li>\n<\/ul>\n<p><span class=\"token assign-left variable\">CONFIG_NET_CORE_DIAG<\/span><span class=\"token operator\">&#061;<\/span>y<br \/>\n<span class=\"token assign-left variable\">CONFIG_ETHTOOL_NETLINK<\/span><span class=\"token operator\">&#061;<\/span>y<\/p>\n<hr \/>\n<h3>\u516d\u3001\u8fdb\u9636\u8bdd\u9898&#xff1a;\u865a\u62df\u7f51\u5361\u4e0eTUN\/TAP<\/h3>\n<p>\u9664\u4e86\u7269\u7406\u7f51\u5361\u9a71\u52a8&#xff0c;Linux\u8fd8\u652f\u6301\u865a\u62df\u7f51\u7edc\u8bbe\u5907&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<ul>\n<li>TUN\/TAP&#xff1a;\u7528\u6237\u6001\u96a7\u9053\u8bbe\u5907&#xff0c;\u7528\u4e8eVPN&#xff08;OpenVPN&#xff09;\u3001\u5bb9\u5668\u7f51\u7edc\u3002<\/li>\n<li>veth pair&#xff1a;\u865a\u62df\u4ee5\u592a\u7f51\u5bf9&#xff0c;\u7528\u4e8eDocker bridge\u901a\u4fe1\u3002<\/li>\n<li>Bridge\/NF Tables\u63a5\u53e3&#xff1a;\u8f6f\u4ea4\u6362\u4e0e\u9632\u706b\u5899\u96c6\u6210\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u4e5f\u57fa\u4e8e struct net_device \u5b9e\u73b0&#xff0c;\u4f46\u65e0\u9700\u64cd\u4f5c\u771f\u5b9e\u786c\u4ef6\u3002<\/p>\n<p>\u793a\u4f8b&#xff1a;\u521b\u5efaTAP\u8bbe\u5907<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/if_tun.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">tun_struct<\/span> <span class=\"token operator\">*<\/span>tun<span class=\"token punctuation\">;<\/span><br \/>\ntun <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">tun_alloc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;tap0&#034;<\/span><span class=\"token punctuation\">,<\/span> IFF_TAP <span class=\"token operator\">|<\/span> IFF_NO_PI<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u4e03\u3001\u603b\u7ed3<\/h3>\n<table>\n<tr>\u9636\u6bb5\u5173\u952e\u4efb\u52a1<\/tr>\n<tbody>\n<tr>\n<td>\u539f\u7406\u7406\u89e3<\/td>\n<td>\u638c\u63e1 net_device \u67b6\u6784\u4e0e\u6570\u636e\u6d41<\/td>\n<\/tr>\n<tr>\n<td>\u9a71\u52a8\u5f00\u53d1<\/td>\n<td>\u5b9e\u73b0 open\/xmit\/interrupt\/stats<\/td>\n<\/tr>\n<tr>\n<td>\u8bbe\u5907\u6811\u9002\u914d<\/td>\n<td>\u6b63\u786e\u63cf\u8ff0 reg\/interrupts\/phy-mode<\/td>\n<\/tr>\n<tr>\n<td>\u79fb\u690d\u8981\u70b9<\/td>\n<td>\u8d44\u6e90\u83b7\u53d6\u3001\u603b\u7ebf\u5dee\u5f02\u3001PHY\u6574\u5408<\/td>\n<\/tr>\n<tr>\n<td>\u8c03\u8bd5\u9a8c\u8bc1<\/td>\n<td>ethtool\/tcpdump\/printk 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