From: Marc Kleine-Budde <mkl@pengutronix.de>
To: David Jander <david@protonic.nl>,
Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Wolfgang Grandegger <wg@grandegger.com>, linux-can@vger.kernel.org
Subject: Re: [PATCH v5] can: flexcan: Re-write receive path to use MB queue instead of FIFO
Date: Wed, 01 Oct 2014 11:58:16 +0200 [thread overview]
Message-ID: <542BD038.2070106@pengutronix.de> (raw)
In-Reply-To: <20141001113432.18ec8bed@archvile>
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On 10/01/2014 11:34 AM, David Jander wrote:
[...]
> Back to topic: Can one of the maintainers (Wolfgang, Marc) give an opinion on
> how to best solve the following two issues:
>
> 1.- Using MB area instead of FIFO for flexcan breaks RTR reception on older
> SoC's. My proposal is to modify my approach as to have two different IRQ
> handling paths: One that off-loads the RX-FIFO into the cyclic-buffer for
> older chips and one that uses the whole MB area and off-loads it into the same
> cyclic buffer for i.MX6, Vybrid and newer chips.
Sounds good.
> 2.- Since the problem addressed by my patch to at91_can is very similar, what
> about solving these problems in the SocketCAN framework (if that is possible)?
Have you had a look at my rx-fifo branch in
https://gitorious.org/linux-can/linux-can-next? It already tries to
abstract the simulation of the FIFO with the linear mailboxes.
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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next prev parent reply other threads:[~2014-10-01 9:58 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-29 12:52 [PATCH v5] can: flexcan: Re-write receive path to use MB queue instead of FIFO David Jander
2014-09-29 13:29 ` Alexander Stein
2014-09-29 14:39 ` David Jander
2014-09-29 15:02 ` Alexander Stein
2014-09-30 7:13 ` David Jander
2014-09-30 7:43 ` Alexander Stein
2014-10-01 6:29 ` David Jander
2014-10-01 7:11 ` Alexander Stein
2014-10-01 7:15 ` Marc Kleine-Budde
2014-10-01 8:29 ` Alexander Stein
2014-10-01 9:07 ` David Jander
2014-10-01 9:19 ` Alexander Stein
2014-10-01 9:34 ` David Jander
2014-10-01 9:58 ` Marc Kleine-Budde [this message]
2014-10-06 7:28 ` David Jander
2014-10-06 10:00 ` Marc Kleine-Budde
2014-10-06 11:17 ` David Jander
2014-10-07 9:30 ` [RFC PATCH 1/2] can: rx-fifo: Increase MB size limit from 32 to 64 David Jander
2014-10-07 9:30 ` [RFC PATCH 2/2] can: rx-fifo: Add support for IRQ readout and NAPI poll David Jander
2014-10-07 13:17 ` [RFC PATCH 1/2] can: rx-fifo: Increase MB size limit from 32 to 64 Marc Kleine-Budde
2014-10-07 13:27 ` David Jander
2014-10-07 14:18 ` Marc Kleine-Budde
2014-10-08 9:08 ` [PATCH v5] can: flexcan: Re-write receive path to use MB queue instead of FIFO David Jander
2014-10-08 9:56 ` Marc Kleine-Budde
2014-10-08 10:36 ` Alexander Stein
2014-10-08 10:43 ` Marc Kleine-Budde
2014-10-08 14:01 ` David Jander
2014-10-09 10:37 ` David Jander
2014-10-01 9:19 ` David Jander
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