From: Oliver Hartkopp <socketcan@hartkopp.net>
To: Vincent MAILHOL <mailhol.vincent@wanadoo.fr>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>,
linux-can <linux-can@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
Max Staudt <max@enpas.org>, netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH v5 0/7] can: refactoring of can-dev module and of Kbuild
Date: Tue, 7 Jun 2022 22:12:46 +0200 [thread overview]
Message-ID: <f161fdd0-415a-8ea1-0aad-3a3a19f1bfa8@hartkopp.net> (raw)
In-Reply-To: <CAMZ6RqKWUyf6dZmxG809-yvjg5wbLwPSLtEfv-MgPpJ5ra=iGQ@mail.gmail.com>
Hi Vincent,
On 07.06.22 04:49, Vincent MAILHOL wrote:
> On Tue. 7 Jun. 2022 at 04:43, Oliver Hartkopp <socketcan@hartkopp.net> wrote:
>>
>>> |
>>> +-> All other CAN devices not relying on RX offload
>>> |
>>> +-> CAN rx offload
>>> symbol: CONFIG_CAN_RX_OFFLOAD
>>
>> Is this still true in patch series 5?
>>
>> If I understood it correctly CONFIG_CAN_BITTIMING and
>> CONFIG_CAN_RX_OFFLOAD can be enabled by the user and
>> (alternatively/additionally) the selection of "flexcan, m_can, mcp251xfd
>> and ti_hecc" enables CONFIG_CAN_RX_OFFLOAD too.
>>
>> Right?
>
> Yes, this is correct. Maybe what troubles you is the meaning of the
> "x --> y" arrow in the graph. I said it denotes that "y depends on x".
> Here "depends on" has a loose meaning. It translates to either:
> * Feature Y is encapsulated in Kbuild by some "if X/endif" and won't
> show up unless X is selected.
> * Feature Y has a "selects X" tag and will forcibly enable X if selected.
>
> CONFIG_CAN_*CALC*_BITTIMING is on the left side of an arrow starting
> from CONFIG_CAN_NETLINK so it "depends" on CONFIG_CAN_NETLINK. On the
> other hand, CONFIG_CAN_*CALC*_BITTIMING does not have any arrow
> starting from it so indeed, it can be enabled by the user
> independently of the other features as long as CONFIG_CAN_NETLINK is
> selected.
Ok.
> CONFIG_CAN_RX_OFFLOAD is also on the left side of an arrow starting
> from CONFIG_CAN_NETLINK. Furthermore, there is an arrow starting from
> CONFIG_CAN_RX_OFFLOAD going to the "rx offload drivers". So those
> drivers need CONFIG_CAN_RX_OFFLOAD (which is implemented using the
> "selects CONFIG_CAN_RX_OFFLOAD"). However, CONFIG_CAN_RX_OFFLOAD can
> be selected independently of the "rx offload drivers" as long as its
> CONFIG_CAN_NETLINK dependency is met.
>
> So I think that the diagram is correct. Maybe rephrasing the cover
> letter as below would address your concerns?
I applied your series and played with the options and it works like
charm - and as expected.
But the point remains that from your figure I would still assume that
the M_CAN driver would only show up when CONFIG_CAN_RX_OFFLOAD was
selected by the user.
But the current (good) implementation shows *all* drivers and selects
CONFIG_CAN_RX_OFFLOAD when e.g. M_CAN is selected.
So what about:
symbol: CONFIG_NETDEVICES
|
+-> CAN Device Drivers
symbol: CONFIG_CAN_DEV
|
+-> software/virtual CAN device drivers
| (at time of writing: slcan, vcan, vxcan)
|
+-> hardware CAN device drivers with Netlink support
symbol: CONFIG_CAN_NETLINK (matches previous CONFIG_CAN_DEV)
|
+-> CAN bit-timing calculation (optional for all drivers)
| symbol: CONFIG_CAN_BITTIMING
|
+-> CAN rx offload (optional but selected by some drivers)
| symbol: CONFIG_CAN_RX_OFFLOAD
|
+-> CAN devices drivers
(some may select CONFIG_CAN_RX_OFFLOAD)
(I also added 'hardware' to CAN device drivers with Netlink support) to
have a distinction to 'software/virtual' CAN device drivers)
At least this would help me to understand the new configuration setup.
Best regards,
Oliver
next prev parent reply other threads:[~2022-06-08 0:48 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 14:23 [PATCH 0/2] can: drop tx skb if the device is in listen only mode Vincent Mailhol
2022-05-13 14:23 ` [PATCH 1/2] can: move can_dropped_invalid_skb from skb.h to dev.h Vincent Mailhol
2022-05-13 14:23 ` [PATCH 2/2] can: dev: drop tx skb if in listen only mode Vincent Mailhol
2022-05-13 14:42 ` [PATCH 0/2] can: drop tx skb if the device is " Marc Kleine-Budde
2022-05-13 15:20 ` Vincent MAILHOL
2022-05-13 15:36 ` [PATCH v2 " Vincent Mailhol
2022-05-13 15:36 ` [PATCH v2 1/2] can: skb:: move can_dropped_invalid_skb and can_skb_headroom_valid to skb.c Vincent Mailhol
2022-05-14 4:20 ` kernel test robot
2022-05-14 5:16 ` Vincent MAILHOL
2022-05-14 11:17 ` Max Staudt
2022-05-13 15:36 ` [PATCH v2 2/2] can: dev: drop tx skb if in listen only mode Vincent Mailhol
2022-05-13 17:40 ` [PATCH v2 0/2] can: drop tx skb if the device is " Max Staudt
2022-05-14 3:00 ` Vincent MAILHOL
2022-05-14 14:16 ` [PATCH v3 0/4] can: can_dropped_invalid_skb() and Kbuild changes Vincent Mailhol
2022-05-14 14:16 ` [PATCH v3 1/4] can: slcan: use can_dropped_invalid_skb() instead of manual check Vincent Mailhol
2022-05-16 20:40 ` Marc Kleine-Budde
2022-05-14 14:16 ` [PATCH v3 2/4] can: Kconfig: change CAN_DEV into a menuconfig Vincent Mailhol
2022-05-14 14:16 ` [PATCH v3 3/4] can: skb:: move can_dropped_invalid_skb and can_skb_headroom_valid to skb.c Vincent Mailhol
2022-05-15 19:17 ` Oliver Hartkopp
2022-05-17 1:50 ` Vincent MAILHOL
2022-05-17 4:12 ` Max Staudt
2022-05-17 6:08 ` Marc Kleine-Budde
2022-05-17 7:04 ` Vincent MAILHOL
2022-05-17 10:45 ` Marc Kleine-Budde
2022-05-17 11:51 ` Oliver Hartkopp
2022-05-17 12:14 ` Max Staudt
2022-05-17 12:21 ` Marc Kleine-Budde
2022-05-17 12:39 ` Max Staudt
2022-05-17 13:35 ` Oliver Hartkopp
2022-05-17 13:43 ` Max Staudt
2022-05-17 14:23 ` Marc Kleine-Budde
2022-05-17 14:35 ` Oliver Hartkopp
2022-05-17 15:38 ` Max Staudt
2022-05-17 15:50 ` Oliver Hartkopp
2022-05-17 17:52 ` Max Staudt
2022-05-18 12:03 ` Vincent MAILHOL
2022-05-18 12:12 ` Device Drivers: (was: Re: [PATCH v3 3/4] can: skb:: move can_dropped_invalid_skb and can_skb_headroom_valid to skb.c) Marc Kleine-Budde
2022-05-18 12:45 ` Oliver Hartkopp
2022-05-18 13:10 ` [PATCH v3 3/4] can: skb:: move can_dropped_invalid_skb and can_skb_headroom_valid to skb.c Oliver Hartkopp
2022-05-18 13:28 ` Marc Kleine-Budde
2022-05-18 14:07 ` Vincent MAILHOL
2022-05-18 14:33 ` Oliver Hartkopp
2022-05-18 14:36 ` Marc Kleine-Budde
2022-05-18 14:38 ` Oliver Hartkopp
2022-05-18 14:55 ` Oliver Hartkopp
2022-05-18 15:38 ` Vincent MAILHOL
2022-05-18 15:48 ` Max Staudt
2022-05-18 16:01 ` Vincent MAILHOL
2022-05-14 14:16 ` [PATCH v3 4/4] can: dev: drop tx skb if in listen only mode Vincent Mailhol
2022-06-03 10:28 ` [PATCH v4 0/7] can: refactoring of can-dev module and of Kbuild Vincent Mailhol
2022-06-03 10:28 ` [PATCH v4 1/7] can: Kbuild: rename config symbol CAN_DEV into CAN_NETLINK Vincent Mailhol
2022-06-03 10:28 ` [PATCH v4 2/7] can: Kconfig: turn menu "CAN Device Drivers" into a menuconfig using CAN_DEV Vincent Mailhol
2022-06-04 11:27 ` Marc Kleine-Budde
2022-06-04 12:30 ` Vincent MAILHOL
2022-06-04 12:43 ` Marc Kleine-Budde
2022-06-04 13:46 ` Marc Kleine-Budde
2022-06-03 10:28 ` [PATCH v4 3/7] can: bittiming: move bittiming calculation functions to calc_bittiming.c Vincent Mailhol
2022-06-04 11:25 ` Marc Kleine-Budde
2022-06-04 12:21 ` Vincent MAILHOL
2022-06-04 12:41 ` Marc Kleine-Budde
2022-06-04 12:56 ` Vincent MAILHOL
2022-06-04 13:51 ` Marc Kleine-Budde
2022-06-03 10:28 ` [PATCH v4 4/7] can: Kconfig: add CONFIG_CAN_RX_OFFLOAD Vincent Mailhol
2022-06-04 11:22 ` Marc Kleine-Budde
2022-06-04 12:14 ` Vincent MAILHOL
2022-06-03 10:28 ` [PATCH v4 5/7] net: Kconfig: move the CAN device menu to the "Device Drivers" section Vincent Mailhol
2022-06-03 10:28 ` [PATCH v4 6/7] can: skb: move can_dropped_invalid_skb() and can_skb_headroom_valid() to skb.c Vincent Mailhol
2022-06-03 10:28 ` [PATCH v4 7/7] can: skb: drop tx skb if in listen only mode Vincent Mailhol
2022-06-04 11:46 ` [PATCH v4 0/7] can: refactoring of can-dev module and of Kbuild Marc Kleine-Budde
2022-06-04 13:05 ` Vincent MAILHOL
2022-06-04 13:55 ` Marc Kleine-Budde
2022-06-04 14:59 ` Vincent MAILHOL
2022-06-04 15:18 ` Marc Kleine-Budde
2022-06-04 16:32 ` Vincent MAILHOL
2022-06-05 10:39 ` Marc Kleine-Budde
2022-06-05 13:57 ` Vincent MAILHOL
2022-06-05 18:08 ` Marc Kleine-Budde
2022-06-04 16:29 ` [PATCH v5 " Vincent Mailhol
2022-06-04 16:29 ` [PATCH v5 1/7] can: Kbuild: rename config symbol CAN_DEV into CAN_NETLINK Vincent Mailhol
2022-06-04 16:29 ` [PATCH v5 2/7] can: Kconfig: turn menu "CAN Device Drivers" into a menuconfig using CAN_DEV Vincent Mailhol
2022-06-04 16:29 ` [PATCH v5 3/7] can: bittiming: move bittiming calculation functions to calc_bittiming.c Vincent Mailhol
2022-06-04 16:29 ` [PATCH v5 4/7] can: Kconfig: add CONFIG_CAN_RX_OFFLOAD Vincent Mailhol
2022-06-07 8:43 ` Geert Uytterhoeven
2022-06-07 9:27 ` Vincent MAILHOL
2022-06-07 16:22 ` Max Staudt
2022-06-07 22:06 ` Jakub Kicinski
2022-06-07 23:40 ` Vincent MAILHOL
2022-06-08 0:07 ` Jakub Kicinski
2022-06-07 23:43 ` Max Staudt
2022-06-08 0:14 ` Jakub Kicinski
2022-06-08 0:22 ` Max Staudt
2022-06-08 1:38 ` Vincent MAILHOL
2022-06-04 16:29 ` [PATCH v5 5/7] net: Kconfig: move the CAN device menu to the "Device Drivers" section Vincent Mailhol
2022-06-04 16:29 ` [PATCH v5 6/7] can: skb: move can_dropped_invalid_skb() and can_skb_headroom_valid() to skb.c Vincent Mailhol
2022-06-04 16:30 ` [PATCH v5 7/7] can: skb: drop tx skb if in listen only mode Vincent Mailhol
2022-06-05 17:23 ` [PATCH v5 0/7] can: refactoring of can-dev module and of Kbuild Max Staudt
2022-06-05 18:06 ` Marc Kleine-Budde
2022-06-05 20:46 ` Max Staudt
2022-06-06 0:24 ` Vincent MAILHOL
2022-06-06 19:24 ` Oliver Hartkopp
2022-06-07 2:49 ` Vincent MAILHOL
2022-06-07 7:13 ` Marc Kleine-Budde
2022-06-07 8:49 ` Vincent MAILHOL
2022-06-07 20:12 ` Oliver Hartkopp [this message]
2022-06-07 20:27 ` Marc Kleine-Budde
2022-06-07 20:51 ` Oliver Hartkopp
2022-06-07 23:59 ` Vincent MAILHOL
2022-06-08 20:10 ` Oliver Hartkopp
2022-06-10 14:30 ` [PATCH v6 " Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 1/7] can: Kconfig: rename config symbol CAN_DEV into CAN_NETLINK Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 2/7] can: Kconfig: turn menu "CAN Device Drivers" into a menuconfig using CAN_DEV Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 3/7] can: bittiming: move bittiming calculation functions to calc_bittiming.c Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 4/7] can: Kconfig: add CONFIG_CAN_RX_OFFLOAD Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 5/7] net: Kconfig: move the CAN device menu to the "Device Drivers" section Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 6/7] can: skb: move can_dropped_invalid_skb() and can_skb_headroom_valid() to skb.c Vincent Mailhol
2022-06-10 14:30 ` [PATCH v6 7/7] can: skb: drop tx skb if in listen only mode Vincent Mailhol
2022-06-10 21:38 ` [PATCH v6 0/7] can: refactoring of can-dev module and of Kbuild Oliver Hartkopp
2022-06-10 22:43 ` Max Staudt
2022-06-11 15:17 ` Marc Kleine-Budde
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