From: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
To: "robh+dt@kernel.org" <robh+dt@kernel.org>,
"frowand.list@gmail.com" <frowand.list@gmail.com>,
"mpe@ellerman.id.au" <mpe@ellerman.id.au>,
"benh@kernel.crashing.org" <benh@kernel.crashing.org>,
"paulus@samba.org" <paulus@samba.org>,
"christophe.leroy@c-s.fr" <christophe.leroy@c-s.fr>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: OF: Can't handle multiple dma-ranges with different offsets
Date: Wed, 22 Jul 2020 22:11:07 +0000 [thread overview]
Message-ID: <961bc990-c815-1a19-c349-8b03065d5aab@alliedtelesis.co.nz> (raw)
In-Reply-To: <5cb3aaa7-e05e-5fbc-db42-60e07acdaf05@alliedtelesis.co.nz>
On 22/07/20 4:19 pm, Chris Packham wrote:
> Hi,
>
> I've just fired up linux kernel v5.7 on a p2040 based system and I'm
> getting the following new warning
>
> OF: Can't handle multiple dma-ranges with different offsets on
> node(/pcie@ffe202000)
> OF: Can't handle multiple dma-ranges with different offsets on
> node(/pcie@ffe202000)
>
> The warning itself was added in commit 9d55bebd9816 ("of/address:
> Support multiple 'dma-ranges' entries") but I gather it's pointing out
> something about the dts. My boards dts is based heavily on
> p2041rdb.dts and the relevant pci2 section is identical (reproduced
> below for reference).
>
> pci2: pcie@ffe202000 {
> reg = <0xf 0xfe202000 0 0x1000>;
> ranges = <0x02000000 0 0xe0000000 0xc 0x40000000 0 0x20000000
> 0x01000000 0 0x00000000 0xf 0xf8020000 0 0x00010000>;
> pcie@0 {
> ranges = <0x02000000 0 0xe0000000
> 0x02000000 0 0xe0000000
> 0 0x20000000
>
> 0x01000000 0 0x00000000
> 0x01000000 0 0x00000000
> 0 0x00010000>;
> };
> };
>
> I haven't noticed any ill effect (aside from the scary message). I'm
> not sure if there's something missing in the dts or in the code that
> checks the ranges. Any guidance would be appreciated.
I've also just checked the T2080RDB on v5.7.9 which shows a similar issue
OF: Can't handle multiple dma-ranges with different offsets on
node(/pcie@ffe250000)
OF: Can't handle multiple dma-ranges with different offsets on
node(/pcie@ffe250000)
pcieport 0000:00:00.0: Invalid size 0xfffff9 for dma-range
pcieport 0000:00:00.0: AER: enabled with IRQ 21
OF: Can't handle multiple dma-ranges with different offsets on
node(/pcie@ffe270000)
OF: Can't handle multiple dma-ranges with different offsets on
node(/pcie@ffe270000)
pcieport 0001:00:00.0: Invalid size 0xfffff9 for dma-range
pcieport 0001:00:00.0: AER: enabled with IRQ 23
next prev parent reply other threads:[~2020-07-22 22:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-22 4:19 OF: Can't handle multiple dma-ranges with different offsets Chris Packham
2020-07-22 22:11 ` Chris Packham [this message]
2020-07-31 0:10 ` Chris Packham
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