netdev - Re: [iwl-next v3 3/7] ice: add basic devlink subfunctions support

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Message-ID: <Zh4JQ4RDRIAYC+V7@mev-dev>
Date: Tue, 16 Apr 2024 07:14:43 +0200
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: Jiri Pirko <jiri@...nulli.us>
Cc: intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	jacob.e.keller@...el.com, michal.kubiak@...el.com,
	maciej.fijalkowski@...el.com, sridhar.samudrala@...el.com,
	przemyslaw.kitszel@...el.com, wojciech.drewek@...el.com,
	pio.raczynski@...il.com, jiri@...dia.com,
	nex.sw.ncis.osdt.itp.upstreaming@...el.com,
	mateusz.polchlopek@...el.com,
	Piotr Raczynski <piotr.raczynski@...el.com>
Subject: Re: [iwl-next v3 3/7] ice: add basic devlink subfunctions support

On Mon, Apr 15, 2024 at 11:10:50AM +0200, Jiri Pirko wrote:
> Mon, Apr 15, 2024 at 10:39:39AM CEST, michal.swiatkowski@...ux.intel.com wrote:
> >On Fri, Apr 12, 2024 at 09:12:18AM +0200, Jiri Pirko wrote:
> >> Fri, Apr 12, 2024 at 08:30:49AM CEST, michal.swiatkowski@...ux.intel.com wrote:
> >> >From: Piotr Raczynski <piotr.raczynski@...el.com>
> 
> [...]
> 
> >> >+static int
> >> >+ice_devlink_port_fn_state_get(struct devlink_port *port,
> >> >+			      enum devlink_port_fn_state *state,
> >> >+			      enum devlink_port_fn_opstate *opstate,
> >> >+			      struct netlink_ext_ack *extack)
> >> >+{
> >> >+	struct ice_dynamic_port *dyn_port;
> >> >+
> >> >+	dyn_port = ice_devlink_port_to_dyn(port);
> >> >+
> >> >+	if (dyn_port->active) {
> >> >+		*state = DEVLINK_PORT_FN_STATE_ACTIVE;
> >> >+		*opstate = DEVLINK_PORT_FN_OPSTATE_ATTACHED;
> >> 
> >> Interesting. This means that you don't distinguish between admin state
> >> and operational state. Meaning, when user does activate, you atomically
> >> achive the hw attachment and it is ready to go before activation cmd
> >> returns, correct? I'm just making sure I understand the code.
> >> 
> >
> >I am setting the dyn_port->active after the activation heppens, so it is
> >true, when active is set it is ready to go.
> >
> >Do you mean that dyn_port->active should be set even before the activation is
> >finished? I mean when user only call devlink to active the port?
> 
> The devlink instance lock is taken the whole time, isn't it?
> 

I don't take PF devlink lock here. Only subfunction devlink lock is
taken during the initialization of subfunction.

> >
> >> 
> >> >+	} else {
> >> >+		*state = DEVLINK_PORT_FN_STATE_INACTIVE;
> >> >+		*opstate = DEVLINK_PORT_FN_OPSTATE_DETACHED;
> >> >+	}
> >> >+
> >> >+	return 0;
> >> >+}
> >> >+
> 
> [...]