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<tr><th colspan="3" align="center">12.8. 快速参考</th></tr>
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<th width="60%" align="center">第 12 章 PCI 驱动</th>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="PCIDriversqr.sect1"></a>12.8. 快速参考</h2></div></div></div>
<p>本节总结在本章中介绍的符号:</p>
<div class="variablelist"><dl>
<dt><span class="term"><span>#include <linux/pci.h></span></span></dt>
<dd><p>包含 PCI 寄存器的符号名和几个供应商和设备 ID 值的头文件.</p></dd>
<dt><span class="term"><span>struct pci_dev;</span></span></dt>
<dd><p>表示内核中一个 PCI 设备的结构.</p></dd>
<dt><span class="term"><span>struct pci_driver;</span></span></dt>
<dd><p>代表一个 PCI 驱动的结构. 所有的 PCI 驱动必须定义这个.</p></dd>
<dt><span class="term"><span>struct pci_device_id;</span></span></dt>
<dd><p>描述这个驱动支持的 PCI 设备类型的结构.</p></dd>
<dt><span class="term"><span>int pci_register_driver(struct pci_driver *drv);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>int pci_module_init(struct pci_driver *drv);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>void pci_unregister_driver(struct pci_driver *drv);</span></span></dt>
<dd><p>从内核注册或注销一个 PCI 驱动的函数.</p></dd>
<dt><span class="term"><span>struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, struct pci_dev *from);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>struct pci_dev *pci_find_device_reverse(unsigned int vendor, unsigned int device, const struct pci_dev *from);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>struct pci_dev *pci_find_subsys (unsigned int vendor, unsigned int device, unsigned int ss_vendor, unsigned int ss_device, const struct pci_dev *from);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>struct pci_dev *pci_find_class(unsigned int class, struct pci_dev *from);</span></span></dt>
<dd><p>在设备列表中搜寻带有一个特定签名的设备, 或者属于一个特定类的. 返回值是 NULL 如果没找到. from 用来继续一个搜索; 在你第一次调用任一个函数时它必须是 NULL, 并且它必须指向刚刚找到的设备如果你寻找更多的设备. 这些函数不推荐使用, 用 pci_get_ 变体来代替.</p></dd>
<dt><span class="term"><span>struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, struct pci_dev *from);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device, unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);</span></span></dt>
<dd><p>在设备列表中搜索一个特定签名的设备, 或者属于一个特定类. 返回值是 NULL 如果没找到. from 用来继续一个搜索; 在你第一次调用任一个函数时它必须是 NULL, 并且它必须指向刚刚找到的设备如果你寻找更多的设备. 返回的结构使它的引用计数递增, 并且在调用者完成它, 函数 pci_dev_put 必须被调用.</p></dd>
<dt><span class="term"><span>int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>int pci_read_config_word(struct pci_dev *dev, int where, u16 *val);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>int pci_write_config_byte (struct pci_dev *dev, int where, u8 *val);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>int pci_write_config_word (struct pci_dev *dev, int where, u16 *val);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>int pci_write_config_dword (struct pci_dev *dev, int where, u32 *val);</span></span></dt>
<dd><p>读或写 PCI 配置寄存器的函数. 尽管 Linux 内核负责字节序, 程序员必须小心字节序当从单个字节组合多字节值时. PCI 总线是小端.</p></dd>
<dt><span class="term"><span>int pci_enable_device(struct pci_dev *dev);</span></span></dt>
<dd><p>使能一个 PCI 设备.</p></dd>
<dt><span class="term"><span>unsigned long pci_resource_start(struct pci_dev *dev, int bar);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>unsigned long pci_resource_end(struct pci_dev *dev, int bar);</span></span></dt>
<dd></dd>
<dt><span class="term"><span>unsigned long pci_resource_flags(struct pci_dev *dev, int bar);</span></span></dt>
<dd><p>处理 PCI 设备资源的函数.</p></dd>
</dl></div>
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<td width="40%" align="left" valign="top">12.7. 外部总线 </td>
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