Access Intel ME IPMB from BMC

[James Feist]

On 4/23/2020 4:10 PM, Vijay Khemka wrote:
> 
> 
> On 4/23/20, 2:00 PM, "James Feist" <james.feist at linux.intel.com> wrote:
> 
>      On 4/23/2020 11:59 AM, Vijay Khemka wrote:
>      > As i2c slave mqueue driver is not upstreamed and with already having
>      > same functionality in ipmb-dev driver which is already in uostream
>      > kernel, I don’t see any reason to use i2c slave mqueue driver. I highly
>      > incourage people to use ipmb-dev driver with latest ipmbbridge. If there
>      > are any issues, please let us know.
>      
>      One issue we ran into is having MCTP and IPMB on the same bus. IPMB
>      driver can't handle MCTP traffic, where the mqueue could handle both.
>      Kernel also doesn't allow multiple slave addresses on one bus. Haven't
>      found a good solution to this one yet.
> 
> I don't see much difference in mqueue and ipmb driver code wise. If
> something has changed in current mqueue driver to support mctp traffic
> then we should try to add these in ipmb driver as well.
> 
> I can't comment much as I have not seen current mqueue driver.

mqueue is protocol agnostic and allows userspace to handle the protocol. 
Nothing changed with it. It's a difference in design.

>      
>      >
>      > Regards
>      >
>      > -Vijay
>      >
>      
>      
>