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vharris007
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Registered: ‎02-24-2015

Zynq AXI-PCI MSI interrupts

Is MSI interrupts functional in Linux 3.17/Vivado 2014.4? I have PCI_MSI enabled in the kernel build. I have a picoZed board design using two Intel i210 MAC. The igb (Intel driver) is falling back to legacy interrupts.

 

[ 958.466473] Intel(R) Gigabit Ethernet Network Driver - version 5.2.15

[ 958.471539] Copyright (c) 2007-2014 Intel Corporation.

[ 958.475905] igb: 0000:01:00.0: igb_validate_option: Interrupt Mode set to 1

[ 958.481485] igb: 0000:01:00.0: igb_check_options: RSS is not supported when in MSI/Legacy Interrupt mode, using default of 1

[ 958.491419] igb 0000:01:00.0: Failed to initialize MSI interrupts. Falling back to legacy interrupts.

[ 958.603302] igb 0000:01:00.0 enp1s0: renamed from eth0

[ 958.604299] igb 0000:01:00.0: added PHC on enp1s0

[ 958.604308] igb 0000:01:00.0: Intel(R) Gigabit Ethernet Network Connection

[ 958.604315] igb 0000:01:00.0: enp1s0: (PCIe:unknown:unknown)

[ 958.604325] igb 0000:01:00.0 enp1s0: MAC: a0:36:9f:4a:50:38

[ 958.604584] igb 0000:01:00.0: enp1s0: PBA No: G69016-002

[ 958.625753] igb 0000:01:00.0: LRO is disabled

[ 958.625764] igb 0000:01:00.0: Using legacy interrupts. 1 rx queue(s), 1 tx queue(s)

 

I loaded a simple PCIe only design in the mini-ITX to test the interface with other NICs. The Broadcom also showed MSI capable but used legacy interrupts too. Any ideas?

 

Van

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