[dpdk-dev] [PATCH v3 0/2] Fix 2 bugs of i40e VF interrupt found in l3fwd-power

[Ferruh Yigit]

On 11/3/2017 1:47 AM, Wei Dai wrote:
> These 2 bugs can be observed from example/l3fwd-power run with i40e VF
> bound to VFIO-PCI. The test steps are as follows:
> 1. Disable LSC interrupt by clearing port_conf.intr_conf.lsc=0, as i40e
>    VF doesn't support LSC interrupt to avoid rte_eth_dev_configure() failure.
> 2. Create a VF from i40e host PF. Let PF run with kernel driver and bind
>    its VF to VFIO-PCI
> 3. Run l3fwd-power like: l3fwd-power -l 18-19 -- -p 0x1 --config='(0,0,19)'
> 
> Then, the following error message appears like:
> EAL: Error enabling MSI-X interrupts for fd 18
> This error is from rte_intr_enable( )/vfio_enable_msix( ) when enabling
> Rx queue interrupt.
> Same as the patch 06938770186a ("net/ixgbe: fix VFIO interrupt mapping in VF"),
> to change VFIO MSI-X interrupts mapping, previous mapping should be cleared
> first to avoid above error.
> 
> After fixing above VFIO-PCI MSI-X interrupt mapping. There is still the following
> 2nd bug: l3fwd-power still can not be waked up by incoming packets.
> 
> Same as the patch ca9d6597184b ("net/ixgbe: fix Rx queue interrupt mapping in VF"),
> the interrupt vector of Rx queues should be mapped to vector 1 to fix above 2nd bug.
> 
> These patches have passed test with l3fwd-power using i40e VF bound to VFIO-PCI.
> They also passed the test with testpmd rxonly and txonly mode with igb_uio and VFIO-PCI.
> 
> Signed-off-by: Wei Dai <wei.dai at intel.com>
> Tested-by: Lei Yao <lei.a.yao at intel.com>

Acked-by: Jingjing Wu <jingjing.wu at intel.com>

Series applied to dpdk-next-net/master, thanks.