From: "Krzysztof Wilczyński" <kw@linux.com>
To: Rob Herring <robh@kernel.org>
Cc: "Toan Le" <toan@os.amperecomputing.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Andrew Murray" <amurray@thegoodpenguin.co.uk>,
"Stéphane Graber" <stgraber@ubuntu.com>,
stable@vger.kernel.org, linux-pci@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PCI: xgene: Fix IB window setup
Date: Tue, 30 Nov 2021 08:55:36 +0100 [thread overview]
Message-ID: <YaXY+E2Uto4O43c3@rocinante> (raw)
In-Reply-To: <20211129173637.303201-1-robh@kernel.org>
Hi,
> Commit 6dce5aa59e0b ("PCI: xgene: Use inbound resources for setup")
> broke PCI support on XGene. The cause is the IB resources are now sorted
> in address order instead of being in DT dma-ranges order. The result is
> which inbound registers are used for each region are swapped. I don't
> know the details about this h/w, but it appears that IB region 0
> registers can't handle a size greater than 4GB. In any case, limiting
> the size for region 0 is enough to get back to the original assignment
> of dma-ranges to regions.
A small nitpick: it would be "X-Gene" in the above as per Applied Micro's
(or rather MACOM Technology Solutions these days, I suppose) product line
naming.
> @@ -465,7 +465,7 @@ static int xgene_pcie_select_ib_reg(u8 *ib_reg_mask, u64 size)
> return 1;
> }
>
> - if ((size > SZ_1K) && (size < SZ_1T) && !(*ib_reg_mask & (1 << 0))) {
> + if ((size > SZ_1K) && (size < SZ_4G) && !(*ib_reg_mask & (1 << 0))) {
> *ib_reg_mask |= (1 << 0);
> return 0;
> }
Thank you!
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Also, thank you Stéphane for testing! Much appreciated!
Krzysztof
next prev parent reply other threads:[~2021-11-30 7:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-29 17:36 [PATCH] PCI: xgene: Fix IB window setup Rob Herring
2021-11-29 19:14 ` Stéphane Graber
2021-11-30 7:55 ` Krzysztof Wilczyński [this message]
2021-11-30 14:30 ` Lorenzo Pieralisi
2022-02-04 23:01 ` dann frazier
2022-02-05 16:05 ` Rob Herring
2022-02-05 21:12 ` dann frazier
2022-02-07 16:09 ` Rob Herring
2022-02-08 1:19 ` dann frazier
2022-02-08 14:34 ` Rob Herring
2022-02-11 2:16 ` dann frazier
2022-02-21 11:50 ` Thorsten Leemhuis
2022-02-06 9:52 ` Thorsten Leemhuis
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