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On Mon, 06 Jun 2005, Greg KH wrote: > > Ok, as it seems there is a bit of confusion, here's real code that > should help explain what I am proposing. This works on my desktop, but > I don't think it supports MSI :) > > I'll go dig out an old 4-way AMD box that has MSI to see if this still > works properly, but comments are welcome. Thanks for posting some sample code. Some comments though: * What if the driver writer does not want MSI enabled for their hardware (even though there is an MSI capabilities entry)? Reasons include: overhead involved in initiating the MSI; no support in some versions of firmware (QLogic hardware). * A device (notably, our 4gb PCIe fibre-channel products) can support both MSI and MSI-X. Since the driver has no way of 'disabling' MSI, how would it enable MSI-X? Thanks, Andrew - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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