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From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
To: Jacob Keller <jacob.e.keller@intel.com>
Cc: Moshe Shemesh <moshe@mellanox.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jiri Pirko <jiri@mellanox.com>, Netdev <netdev@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net-next RFC 00/13] Add devlink reload level option
Date: Mon, 3 Aug 2020 15:54:59 +0530
Message-ID: <CAACQVJo+bAr_k=LjgdTKbOxFEkpbYAsaWbkSDjUepgO7_XQfNA@mail.gmail.com> (raw)
In-Reply-To: <a3e20b44-9399-93c1-210f-e3c1172bf60d@intel.com>

On Tue, Jul 28, 2020 at 10:13 PM Jacob Keller <jacob.e.keller@intel.com> wrote:
>
>
>
> On 7/27/2020 10:25 PM, Vasundhara Volam wrote:
> > On Mon, Jul 27, 2020 at 4:36 PM Moshe Shemesh <moshe@mellanox.com> wrote:
> >>
> >> Introduce new option on devlink reload API to enable the user to select the
> >> reload level required. Complete support for all levels in mlx5.
> >> The following reload levels are supported:
> >>   driver: Driver entities re-instantiation only.
> >>   fw_reset: Firmware reset and driver entities re-instantiation.
> > The Name is a little confusing. I think it should be renamed to
> > fw_live_reset (in which both firmware and driver entities are
> > re-instantiated).  For only fw_reset, the driver should not undergo
> > reset (it requires a driver reload for firmware to undergo reset).
> >
>
> So, I think the differentiation here is that "live_patch" doesn't reset
> anything.
This seems similar to flashing the firmware and does not reset anything.

>
> >>   fw_live_patch: Firmware live patching only.
> > This level is not clear. Is this similar to flashing??
> >
> > Also I have a basic query. The reload command is split into
> > reload_up/reload_down handlers (Please correct me if this behaviour is
> > changed with this patchset). What if the vendor specific driver does
> > not support up/down and needs only a single handler to fire a firmware
> > reset or firmware live reset command?
>
> In the "reload_down" handler, they would trigger the appropriate reset,
> and quiesce anything that needs to be done. Then on reload up, it would
> restore and bring up anything quiesced in the first stage.
Yes, I got the "reload_down" and "reload_up". Similar to the device
"remove" and "re-probe" respectively.

But our requirement is a similar "ethtool reset" command, where
ethtool calls a single callback in driver and driver just sends a
firmware command for doing the reset. Once firmware receives the
command, it will initiate the reset of driver and firmware entities
asynchronously.

  reply index

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-27 11:02 Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 01/13] devlink: Add reload level option to devlink reload command Moshe Shemesh
2020-07-28  0:58   ` Jakub Kicinski
2020-07-28 13:58     ` Jiri Pirko
2020-07-28 16:47       ` Jacob Keller
2020-07-28 18:44         ` Jakub Kicinski
2020-07-28 19:18           ` Jacob Keller
2020-07-28 20:06             ` Jakub Kicinski
2020-07-29 14:54               ` Moshe Shemesh
2020-07-29 21:07                 ` Jakub Kicinski
2020-07-30 12:30                   ` Moshe Shemesh
2020-07-30 23:11                     ` Jakub Kicinski
2020-08-01 21:32                       ` Moshe Shemesh
2020-08-03 14:14                         ` Jiri Pirko
2020-08-03 20:57                           ` Jakub Kicinski
2020-08-04 10:04                             ` Jiri Pirko
2020-08-04 20:39                               ` Jakub Kicinski
2020-08-05 11:02                                 ` Jiri Pirko
2020-08-06 18:25                                   ` Jakub Kicinski
2020-08-06 22:56                                     ` Jacob Keller
2020-08-09 13:21                                     ` Moshe Shemesh
2020-08-10 16:53                                       ` Jakub Kicinski
2020-08-10 17:09                                         ` Jacob Keller
2020-08-10 18:17                                           ` Jakub Kicinski
2020-08-11  5:46                                         ` Jiri Pirko
2020-07-27 11:02 ` [PATCH net-next RFC 02/13] devlink: Add reload levels data to dev get Moshe Shemesh
2020-07-28  0:58   ` Jakub Kicinski
2020-07-29 14:37     ` Moshe Shemesh
2020-07-29 21:11       ` Jakub Kicinski
2020-07-30 12:05         ` Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 03/13] net/mlx5: Add functions to set/query MFRL register Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 04/13] net/mlx5: Set cap for pci sync for fw update event Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 05/13] net/mlx5: Handle sync reset request event Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 06/13] net/mlx5: Handle sync reset now event Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 07/13] net/mlx5: Handle sync reset abort event Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 08/13] net/mlx5: Add support for devlink reload level fw reset Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 09/13] devlink: Add enable_remote_dev_reset generic parameter Moshe Shemesh
2020-07-28  0:59   ` Jakub Kicinski
2020-07-29 14:42     ` Moshe Shemesh
2020-07-29 20:57       ` Jakub Kicinski
2020-07-30 12:08         ` Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 10/13] net/mlx5: Add devlink param enable_remote_dev_reset support Moshe Shemesh
2020-07-28  0:59   ` Jakub Kicinski
2020-07-27 11:02 ` [PATCH net-next RFC 11/13] net/mlx5: Add support for fw live patch event Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 12/13] net/mlx5: Add support for devlink reload level live patch Moshe Shemesh
2020-07-27 11:02 ` [PATCH net-next RFC 13/13] devlink: Add Documentation/networking/devlink/devlink-reload.rst Moshe Shemesh
2020-07-28  5:25 ` [PATCH net-next RFC 00/13] Add devlink reload level option Vasundhara Volam
2020-07-28 16:43   ` Jacob Keller
2020-08-03 10:24     ` Vasundhara Volam [this message]
2020-08-03 12:17       ` Moshe Shemesh
2020-08-03 12:47         ` Vasundhara Volam
2020-08-03 13:52           ` Moshe Shemesh
2020-08-04 10:13             ` Vasundhara Volam
2020-08-05  6:32               ` Moshe Shemesh
2020-08-05  6:55                 ` Vasundhara Volam
2020-08-05  8:20                   ` Moshe Shemesh
2020-08-12  9:34                     ` Vasundhara Volam
2020-07-28 16:37 ` Jacob Keller

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