[dpdk-dev] Q on Support for I217 and I218 Intel chipsets.

[Ravi Kerur]

Thomas,

Please let me know how I can move forward on this. If i confine changes in
e1000/ directory to e1000_osdep.h file only and the rest in PMD will that
work? The reason I ask is because of following comment  in README file.

...
Few changes to the original FreeBSD sources were made to:
- Adopt it for PMD usage mode:
        e1000_osdep.c
        e1000_osdep.h
...

Thanks.

On Mon, Jan 5, 2015 at 8:40 AM, Ravi Kerur <rkerur at gmail.com> wrote:

> Inline <rk>
>
> On Mon, Jan 5, 2015 at 12:55 AM, Thomas Monjalon <
> thomas.monjalon at 6wind.com> wrote:
>
>> 2015-01-04 15:28, Ravi Kerur:
>> > We have a Gigabyte H97N motherboard which has I217 Intel chipset which
>> uses
>> > e100e drivers. I looked into lib/librte_pmd_e1000 directory and I do see
>> > that e1000e code is integrated but missing some support for read/write
>> from
>> > flash_address and other minor things. I have made changes shown below
>> and
>> > have done some testing with testpmd utility and now have following
>> questions
>> >
>> > 1. What amount of testing is required to qualify patch as successfully
>> > tested on new chipsets
>>
>> There is no good answer to this question. Generally, you must be sure that
>> you don't break anything.
>> So you must test the code paths you have changed.
>>
>
> <rk> yes I have done testing on Ubuntu for I217 using testpmd.
>
>>
>> > 2. FreeBSD testing, currently we have Ubuntu 14.04 installed on existing
>> > H97N motherboard and testing is done solely on Linux. We plan to get
>> > another motherboard which will have I218 chipset and still deciding
>> whether
>> > to go with FreeBSD or Ubuntu. So the question I have is what amount of
>> > testing should be done on FreeBSD? I don't think
>> setup.sh/dpdk_nic_bind.py
>> > works on FreeBSD yet hence the question on testing.
>>
>> FreeBSD testing is required when patching common EAL, scripts or
>> makefiles.
>>
>> > >  lib/librte_pmd_e1000/e1000/e1000_api.c          | 21
>> +++++++++++++++++++++
>> > >  lib/librte_pmd_e1000/e1000/e1000_api.h          |  1 +
>> > >  lib/librte_pmd_e1000/e1000/e1000_osdep.h        | 24
>> +++++++++++++++++++-----
>>
>> These files are part of the base driver.
>> The rule is to not patch them and try to do the changes in PMD only.
>> There can be exceptions if an Intel maintainer acknowledges it.
>>
>
> <rk>  Changes in these files are modifying existing macros
>
> E1000_READ_FLASH_REG,
> E1000_WRITE_FLASH_REG
> ...
>
> If it is not recommended to modify these files, should I move macros into
> some PMD file?
>
> Thanks.
>
>>
>> --
>> Thomas
>>
>
>