On Monday 04 August 2014, Yijing Wang wrote: > I have another question is some drivers will request more than one > MSI/MSI-X IRQ, and the driver will use them to process different things. > Eg. network driver generally uses one of them to process trivial network thins, > and others to transmit/receive data. > > So, in this case, it seems to driver need to touch the IRQ numbers. > > wr-linux:~ # cat /proc/interrupts > CPU0 CPU1 CPU2 .... CPU17 CPU18 CPU19 CPU20 CPU21 CPU22 CPU23 > ...... > 100: 0 0 0 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth0 > 101: 2 0 0 0 0 0 302830488 0 0 0 IR-PCI-MSI-edge eth0-TxRx-0 > 102: 110 0 0 0 0 360675897 0 0 0 0 IR-PCI-MSI-edge eth0-TxRx-1 > 103: 109 0 0 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth0-TxRx-2 > 104: 107 0 0 9678933 0 0 0 0 0 0 IR-PCI-MSI-edge eth0-TxRx-3 > 105: 107 0 0 0 357838258 0 0 0 0 0 IR-PCI-MSI-edge eth0-TxRx-4 > 106: 115 0 0 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth0-TxRx-5 > 107: 114 0 0 0 0 0 0 337866096 0 0 IR-PCI-MSI-edge eth0-TxRx-6 > 108: 373801199 0 0 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth0-TxRx-7 > I think in this example, you just need to request eight interrupts, and pass a different data pointer each time, pointing to the napi_struct of each of the NIC queues. The driver has no need to deal with the IRQ number at all, and I would be surprised if it cared today. Arnd -- 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
