[dpdk-dev] [RFC] vfio: only map regions VFIO supports

[Qiu, Michael]

Hi, Stephen

I have found out the root cause of this bug, and generate a patch.

Will send out later after :)

Thanks,
Michael

On 7/11/2015 1:24 AM, Stephen Hemminger wrote:
> On Fri, 10 Jul 2015 07:54:10 +0000
> "Qiu, Michael" <michael.qiu at intel.com> wrote:
>
>> Hi, Stephen
>>
>> This patch does not work for fm10k with vfio, see error below:
>>
>> EAL: PCI device 0000:84:00.0 on NUMA socket 1
>> EAL:   probe driver: 8086:15a4 rte_pmd_fm10k
>> EAL:   PCI memory mapped at 0x7f1980000000
>> EAL: Trying to map BAR 2 that contains the MSI-X table. Trying offsets:
>> 0000:0000, 1000:1000
>> EAL:   PCI memory mapped at 0x7f1980401000
>> EAL: pci_map_resource(): cannot mmap(105, 0x7f1980402000, 0x4000000,
>> 0x0): Invalid argument (0xffffffffffffffff)
>> EAL:   0000:84:00.0 mapping BAR4 failed: Invalid argument
>> EAL: Error - exiting with code: 1
>>   Cause: Requested device 0000:84:00.0 cannot be used
> Yes. The patch doesn't solve the problem (but might be needed in some future weird hw).
>
>