Hello, Please help if you have any idea. Brief description of my system and software: We have intel x86 processor connected with our system via PCIe bus. Our system is visible as bus XX, device YY and function Z from x86. We are using RHEL 6.1 as OS on x86. Our system (basically a PCIe device for x86), supports 32 interrupt sources. Whenever there is any interrupt, an MSI will be passed to x86 local IOAPIC as a unique MSI. So there can be 32 MSIs from my single PCI device. I made a Linux PCI device driver for this device. I have enabled MSI using pci_enable_msi and registered an IRQ accordingly with an ISR. Question: When MSI is received at x86 PCI device driver (and ISR is called), how do I verify that the IRQ is for which MSI? I thought of using pci_enable_msi_block() but the question remains the same. How do the ISR in PCI device driver knows that it is being called for which MSI?How can I register separate 32 ISRs for my PCI device? Moreover in existing Linux kernel, I don't see any driver using pci_enable_msi_block(). If you have any open source code to understand it's usage, that will be a great help. Thanks for any response from any of you. - Bhavin -- 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
