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| 楼主：zxq12 |
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| 如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断 |
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~~！：）
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2008-07-31 09:46:16 |
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| 2楼：匿名用户66358
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| 回复：如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断 |
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2008-07-31 14:07:47 |
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| 3楼：匿名用户85926
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| 回复：如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断 |
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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. Thi |
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2008-08-06 15:12:52 |
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| 4楼：匿名用户38868
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| 回复：如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断 |
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楼主个什么东东~ |
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2008-08-06 15:13:46 |
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| 5楼：匿名用户57212
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| 回复：如何使windows 2003系统的驱动，响应PCI-E设备的MSI中断 |
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http://www.themssforum.com/Drivers/Message-Signaled-106253/
1. Is it true MSI only support on Vista or later version of Windows?
Yes. Only Vista/2008 support MSI interrupts. |
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2008-08-08 11:37:13 |
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