On Sat, Dec 13, 2008 at 01:38:24PM +0400, Manu Abraham wrote: > Hi, > > I am wondering how to handle this: > > Does the kernel somehow handle MSI message readback from the PCI config space > for the MSI message as described in 6.8.1 of the PCI Bus specification 2.3 or > does a device specific driver have to read the Message Address and Data ? > > To put it short: i am wondering how i should read the MSI messages. The "message" is actually mapped to an the interrupt vector by the core generic interrupt handling code in the kernel. A "GSI" (Generic Sys Interrupt?) is associated with each entry in the MSI-X table. Driver then calls request_irq() to bind an interrupt handler to each GSI. So the driver never directly sees the "message". hth, grant -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
