From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: "Zhao1, Wei" <wei.zhao1@intel.com>
Cc: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
"Mcnamara, John" <john.mcnamara@intel.com>,
dev@dpdk.org, "Lu, Wenzhuo" <wenzhuo.lu@intel.com>
Subject: Re: [dpdk-dev] [PATCH v4 1/3] lib/librte_ether: add support for port reset
Date: Fri, 14 Apr 2017 08:31:26 +0200 [thread overview]
Message-ID: <3836931.6Eq3YNmgkB@xps13> (raw)
In-Reply-To: <A2573D2ACFCADC41BB3BE09C6DE313CA0207EAAD@PGSMSX103.gar.corp.intel.com>
2017-04-14 01:29, Zhao1, Wei:
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> > 2017-04-13 08:55, Zhao1, Wei:
> > > From: Ananyev, Konstantin
> > > > From: Zhao1, Wei
> > > > > From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> > > > > > 2017-04-06 02:57, Zhao1, Wei:
> > > > > > > > /**
> > > > > > > > > + * Reset an ethernet device when it's not working. One
> > > > > > > > > + scenario is, after PF
> > > > > > > > > + * port is down and up, the related VF port should be reset.
> > > > > > > > > + * The API will stop the port, clear the rx/tx queues,
> > > > > > > > > + re-setup the rx/tx
> > > > > > > > > + * queues, restart the port.
> > > > > > > >
> > > > > > > > s/The API/This function/
> > > > > > > >
> > > > > > > > Please explain exactly the responsibility of this function,
> > > > > > > > and how it is different from calling stop/configure/start.
> > > > > > >
> > > > > > > In this reset feature, reset function can do the calling
> > > > > > > stop/configure/start process, but also It can also do some
> > > > > > > restore work for the port, for example, it can restore the
> > > > > > > added parameters of
> > > > > > vlan, mac_addrs, promisc_unicast_enabled falg and
> > > > > > promisc_multicast_enabled flag.
> > > >
> > > > Ok, but why start/stop can't do these things?
> > > > Konstantin
> > >
> > > This is because in i40e PMD code, start and stop process do not have
> > > the process of store and restore the added key parameters. Not only
> > > i40e but also other PMD code. So, in the function pointed to by dev_reset,
> > we add specific function do store and restore of some of the important
> > parameters listed above.
> >
> > Why store and restore cannot be implemented in start/stop functions?
>
> Because reset and start/stop are used for two purposes, for example:
> Some user maybe just start/stop the port and he do not care what key parameters
> has been configuration last time, and even worse when he want to clear all the configuration last time ,
> if we add specific function do store and restore in that two function, it is useless for them,
> and may cause a result that user do not expect.
Is it said somewhere in the doc that the configuration is lost when
stopping a device?
Can we say which configuration parameter is kept and which one is lost?
rte_eth_dev_config_restore() is called in rte_eth_dev_start().
next prev parent reply other threads:[~2017-04-14 6:31 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-30 9:34 [dpdk-dev] [PATCH v4 0/3] net/i40e: vf " Wei Zhao
2017-03-30 9:34 ` [dpdk-dev] [PATCH v4 1/3] lib/librte_ether: add support for " Wei Zhao
2017-03-30 19:55 ` Thomas Monjalon
2017-04-06 2:57 ` Zhao1, Wei
2017-04-06 7:11 ` Thomas Monjalon
2017-04-06 8:53 ` Zhao1, Wei
2017-04-06 9:02 ` Ananyev, Konstantin
2017-04-10 20:58 ` Thomas Monjalon
2017-04-13 8:55 ` Zhao1, Wei
2017-04-13 10:06 ` Thomas Monjalon
2017-04-14 1:29 ` Zhao1, Wei
2017-04-14 6:31 ` Thomas Monjalon [this message]
2017-04-14 8:03 ` Zhao1, Wei
2017-04-17 2:08 ` Zhao1, Wei
2017-04-17 5:02 ` Zhao1, Wei
2017-04-20 6:07 ` Yuanhan Liu
2017-04-20 9:17 ` Zhao1, Wei
2017-04-21 2:27 ` Yuanhan Liu
2017-04-21 8:27 ` Thomas Monjalon
2017-04-21 8:59 ` Zhao1, Wei
2017-04-21 9:28 ` Thomas Monjalon
2017-04-24 2:01 ` Yuanhan Liu
2017-04-24 3:15 ` Zhao1, Wei
2017-04-24 3:39 ` Zhao1, Wei
2017-04-24 8:04 ` Thomas Monjalon
2017-04-25 3:14 ` Zhao1, Wei
2017-04-21 8:55 ` Zhao1, Wei
2017-03-30 9:34 ` [dpdk-dev] [PATCH v4 2/3] net/i40e: implement device reset on port Wei Zhao
2017-03-30 9:34 ` [dpdk-dev] [PATCH v4 3/3] app/testpmd: add port reset command into testpmd Wei Zhao
2017-03-30 12:32 ` [dpdk-dev] [PATCH v4 0/3] net/i40e: vf port reset Wu, Jingjing
2017-04-05 5:42 ` Zhao1, Wei
2017-04-06 6:33 ` [dpdk-dev] [PATCH v5 " Wei Zhao
2017-04-06 6:33 ` [dpdk-dev] [PATCH v5 1/3] lib/librte_ether: add support for " Wei Zhao
2017-04-06 6:33 ` [dpdk-dev] [PATCH v5 2/3] net/i40e: implement device reset on port Wei Zhao
2017-04-06 6:33 ` [dpdk-dev] [PATCH v5 3/3] app/testpmd: add port reset command into testpmd Wei Zhao
2017-04-06 6:51 ` [dpdk-dev] [PATCH v6 0/3] net/i40e: vf port reset Wei Zhao
2017-04-06 6:51 ` [dpdk-dev] [PATCH v6 1/3] lib/librte_ether: add support for " Wei Zhao
2017-04-07 6:58 ` Yang, Qiming
2017-04-10 2:21 ` Zhao1, Wei
2017-04-06 6:51 ` [dpdk-dev] [PATCH v6 2/3] net/i40e: implement device reset on port Wei Zhao
2017-04-06 6:51 ` [dpdk-dev] [PATCH v6 3/3] app/testpmd: add port reset command into testpmd Wei Zhao
2017-04-10 3:02 ` [dpdk-dev] [PATCH v7 0/3] net/i40e: vf port reset Wei Zhao
2017-04-10 3:02 ` [dpdk-dev] [PATCH v7 1/3] lib/librte_ether: add support for " Wei Zhao
2017-04-20 20:49 ` Thomas Monjalon
2017-04-21 3:20 ` Zhao1, Wei
2017-04-20 20:52 ` Thomas Monjalon
2017-04-10 3:02 ` [dpdk-dev] [PATCH v7 2/3] net/i40e: implement device reset on port Wei Zhao
2017-04-20 21:12 ` Thomas Monjalon
2017-04-21 3:39 ` Zhao1, Wei
2017-04-20 21:20 ` Thomas Monjalon
2017-04-10 3:02 ` [dpdk-dev] [PATCH v7 3/3] app/testpmd: add port reset command into testpmd Wei Zhao
2017-04-20 21:37 ` [dpdk-dev] [PATCH v7 0/3] net/i40e: vf port reset Thomas Monjalon
-- strict thread matches above, loose matches on Subject: below --
2017-03-30 9:21 [dpdk-dev] [PATCH v4 " Wei Zhao
2017-03-30 9:21 ` [dpdk-dev] [PATCH v4 1/3] lib/librte_ether: add support for " Wei Zhao
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