From: "Pali Rohár" <pali@kernel.org>
To: Marcin Wojtas <mw@semihalf.com>
Cc: "Marek Behún" <kabel@kernel.org>,
"Russell King (Oracle)" <linux@armlinux.org.uk>,
"Christoph Hellwig" <hch@lst.de>,
"Robin Murphy" <robin.murphy@arm.com>,
"Arnd Bergmann" <arnd@kernel.org>,
"Andre Przywara" <andre.przywara@arm.com>,
"Marc Zyngier" <maz@kernel.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Andrew Lunn" <andrew@lunn.ch>,
"Gregory Clement" <gregory.clement@bootlin.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally"
Date: Tue, 4 Oct 2022 20:51:52 +0200 [thread overview]
Message-ID: <20221004185152.sssz2n7uqmxcp5er@pali> (raw)
In-Reply-To: <CAPv3WKfaRadC8FKiOnAJbSwTRMsJ4+V-Z2A0MAX3uGy39te3NQ@mail.gmail.com>
On Tuesday 04 October 2022 14:59:29 Marcin Wojtas wrote:
> wt., 4 paź 2022 o 14:37 Marek Behún <kabel@kernel.org> napisał(a):
> > And now I am wondering about whether this didn't also cause the buffer
> > manager not working on Armada 3720. Marvell just gave an erratum that
> > HWBM is broken on 3720, but maybe they didn't notice this and just gave
> > up.
>
> I implemented inital version of this support, which was never
> published > 5y ago (I checked my oldest repos, but the code is gone
> unfortunately). I don't recall exact HW issue justification - I
> remember it was not related to coherency though, but the decision was
> to drop it.
>
> >
> > Also mvneta works only with one CPU on 3720 (see usage of
> > pp->neta_armada3700 in mvneta.c), which I also still don't know why,
> > and maybe it is related to this.
> >
>
> The single-core processing is result of the problems with per-CPU IRQ
> routing for the NETA controllers (never to be fixed eventually), not
> related to coherency whatsoever.
>
> Best regards,
> Marcin
FYI this is described in A3720 errata document.
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next prev parent reply other threads:[~2022-10-04 18:53 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-30 13:10 REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally" Marek Behún
2022-09-30 13:46 ` Robin Murphy
2022-09-30 14:52 ` Marek Behún
2022-09-30 15:02 ` Marek Behún
2022-09-30 16:41 ` Robin Murphy
2022-09-30 18:02 ` Marek Behún
2022-10-03 7:21 ` Christoph Hellwig
2022-10-03 7:30 ` Christoph Hellwig
2022-10-03 14:11 ` Russell King (Oracle)
2022-10-03 15:25 ` Marek Behún
2022-10-03 16:09 ` Pali Rohár
2022-10-03 19:04 ` Marek Behún
2022-10-03 19:08 ` Pali Rohár
2022-10-03 21:30 ` Marcin Wojtas
2022-10-03 21:35 ` Pali Rohár
2022-10-03 22:03 ` Marcin Wojtas
2022-10-04 7:10 ` Christoph Hellwig
2022-10-04 8:15 ` Marek Behún
2022-10-04 8:17 ` [PATCH] ARM: mvebu: select OF_DMA_DEFAULT_COHERENT if MACH_MVEBU_V7 Marek Behún
2022-10-04 8:30 ` Christoph Hellwig
2022-10-04 12:54 ` Marek Behún
2022-10-04 8:30 ` Arnd Bergmann
2022-10-04 9:14 ` Thorsten Leemhuis
2022-10-04 9:22 ` Russell King (Oracle)
2022-10-04 9:56 ` REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally" Robin Murphy
2022-10-04 7:25 ` Russell King (Oracle)
2022-10-04 8:30 ` Marcin Wojtas
2022-10-04 9:08 ` Russell King (Oracle)
2022-10-04 12:36 ` Marek Behún
2022-10-04 12:59 ` Marcin Wojtas
2022-10-04 18:51 ` Pali Rohár [this message]
2022-10-04 19:35 ` Marcin Wojtas
2022-10-04 8:26 ` Marek Behún
2022-10-04 8:36 ` Marcin Wojtas
2022-10-20 18:22 ` Russell King (Oracle)
2022-10-20 19:10 ` Marek Behún
2022-10-21 16:25 ` Linus Torvalds
2022-10-21 16:30 ` Christoph Hellwig
2022-10-21 18:21 ` Russell King (Oracle)
2022-10-23 11:58 ` Klaus Kudielka
2022-10-03 18:57 ` Marek Behún
2022-10-01 9:31 ` Thorsten Leemhuis
2022-11-04 12:08 ` REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally" #forregzbot Thorsten Leemhuis
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