如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断

wangdong_wind

如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断 [复制链接]

在给PCI-E设备做WDM驱动，设备采用MSI中断，但据说windows 2003操作系统不支持MSI中断，如何能实现呢？

以下摘自MSDN:
MSI 只在Windows Vista/2008以上的系统支持，在Win2003/XP下是不支持的。
Message-signaled interrupts (MSIs) were introduced in the PCI 2.2 specification as an alternative to line-based interrupts Windows Vista and later versions of the Windows operating systems support MSI and MSI-X. If your product only support MSI, then it cannot run on Win2003/XP.
The PCI express specifications state that you need to support both message signaled interrupt and "old-style" interrupts, so that if MSI interrupts are not supported by the OS, the OS will use the old-style interrupts.

The flag(CM_RESOURCE_INTERRUPT_MESSAGE) means the interrupt is a message-based interrupt. Otherwise, the interrupt is a line-based interrupt. This flag can be set only on Windows Vista and later operating system versions.
MSI中断应该是：
Type = CmResourceTypeInterrupt and Flags = CM_RESOURCE_INTERRUPT_LATCHED | CM_RESOURCE_INTERRUPT_MESSAGE.


PCI-E设备支持两种中断：真正的PCI－E中断发送机制（MSI）和传统的PCI中断发送机制。从PCI-X开始设备就可以选用MSI中断模式了。

按照MSDN的说法，所有PCI－E的设备在windows2003上，都不能用真正的PCI－E中断发送机制（MSI），而只能都用传统的PCI中断发送机制。

但目前市面上有那么多PCI-E设备，应该有方法使windows2003的驱动可以相应PCI-E设备的MSI中断信号,请知道的大虾多多指点，小M这厢有礼了~~！：）

wmlhjn

没有高手知道么？