On 3/8/2021 3:31 PM, Xueming(Steven) Li wrote:
-----Original Message-----
From: Ferruh Yigit <ferruh.yi...@intel.com>
Sent: Monday, March 8, 2021 10:44 PM
To: Xueming(Steven) Li <xuemi...@nvidia.com>; Andrew Rybchenko
<andrew.rybche...@oktetlabs.ru>
Cc: dev@dpdk.org; Slava Ovsiienko <viachesl...@nvidia.com>; Asaf Penso
<as...@nvidia.com>; NBU-Contact-Thomas Monjalon
<tho...@monjalon.net>; Ray Kinsella <m...@ashroe.eu>; Neil Horman
<nhor...@tuxdriver.com>
Subject: Re: [PATCH v8 7/9] ethdev: new API to get representor info
On 3/4/2021 2:30 PM, Xueming Li wrote:
The NIC can have multiple PCIe links and can be attached to multiple
hosts, for example the same single NIC can be shared for multiple
server units in the rack. On each PCIe link NIC can provide multiple
PFs and VFs/SFs based on these ones. The full representor identifier
consists of three indices - controller index, PF index, and VF or SF index (if
any).
This patch introduces a new API rte_eth_representor_info_get() to
retrieve representor corresponding info mapping:
- caller controller index and pf index.
- supported representor ID ranges.
- type, controller, pf and start vf/sf ID of each range.
The API is useful to convert representor from devargs to representor ID.
New ethdev callback representor_info_get() is added to retrieve info
from PMD driver, optional for PMD that doesn't support new devargs
representor syntax.
Signed-off-by: Xueming Li <xuemi...@nvidia.com>
Acked-by: Andrew Rybchenko <andrew.rybche...@oktetlabs.ru>
This is middle layer implementation, and there is not problem with it but
without PMD and application implementations it is harder to
get why/how this API will be used.
As far as I can see this API is not directly needed for this set, what do you
think making this another set with PMD and application
implementations on top of current set?
Hi Ferruh,
Thanks for checking this! The patch next, 8/9 which update device iterator for
SF representor needs this API to get representor ID then compare.
Got it thanks.
Intention of the new API seems to get info to be able to calculate the unique
"representor ID" and the helper function 'rte_eth_representor_id_get()'
implements a logic to calculate this unique ID but that logic is not clear, can
you please document it more to help the PMD developers to implement
'representor_info_get()'?
