linux-kernel - Re: [PATCH net-next v2 0/2] Add sysfs attributes for MANA

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Date: Mon, 29 Apr 2024 22:31:38 -0700
From: Shradha Gupta <shradhagupta@...ux.microsoft.com>
To: Jiri Pirko <jiri@...nulli.us>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jonathan Corbet <corbet@....net>,
	Randy Dunlap <rdunlap@...radead.org>,
	Johannes Berg <johannes.berg@...el.com>,
	Breno Leitao <leitao@...ian.org>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, "K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
	Long Li <longli@...rosoft.com>,
	Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>,
	Konstantin Taranov <kotaranov@...rosoft.com>,
	Yury Norov <yury.norov@...il.com>, linux-hyperv@...r.kernel.org,
	shradhagupta@...rosoft.com
Subject: Re: [PATCH net-next v2 0/2] Add sysfs attributes for MANA

On Wed, Apr 24, 2024 at 04:48:06PM +0200, Jiri Pirko wrote:
> Wed, Apr 24, 2024 at 12:32:54PM CEST, shradhagupta@...ux.microsoft.com wrote:
> >These patches include adding sysfs attributes for improving
> >debuggability on MANA devices.
> >
> >The first patch consists on max_mtu, min_mtu attributes that are
> >implemented generically for all devices
> >
> >The second patch has mana specific attributes max_num_msix and num_ports
> 
> 1) you implement only max, min is never implemented, no point
> introducing it.
Sure. I had added it for the sake of completeness.
> 2) having driver implement sysfs entry feels *very wrong*, don't do that
> 3) why DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX
>    and DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN
>    Are not what you want?
Thanks for pointing this out. We are still evaluating if this devlink param
could be used for our usecase where we only need a read-only msix value for VF.
We keep the thread updated.
> 
> >
> >Shradha Gupta (2):
> >  net: Add sysfs atttributes for max_mtu min_mtu
> >  net: mana: Add new device attributes for mana
> >
> > Documentation/ABI/testing/sysfs-class-net     | 16 ++++++++++
> > .../net/ethernet/microsoft/mana/gdma_main.c   | 32 +++++++++++++++++++
> > net/core/net-sysfs.c                          |  4 +++
> > 3 files changed, 52 insertions(+)
> >
> >-- 
> >2.34.1
> >
> >