From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Gaurav Batra <gbatra@linux.vnet.ibm.com>
Cc: brking@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org,
gjoyce@linux.vnet.ibm.com
Subject: Re: [PATCH v3] powerpc/iommu: DMA address offset is incorrectly calculated with 2MB TCEs
Date: Mon, 03 Jul 2023 15:21:16 +1000 [thread overview]
Message-ID: <168836167609.46386.4988989425263088348.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20230504175913.83844-1-gbatra@linux.vnet.ibm.com>
On Thu, 04 May 2023 12:59:13 -0500, Gaurav Batra wrote:
> When DMA window is backed by 2MB TCEs, the DMA address for the mapped
> page should be the offset of the page relative to the 2MB TCE. The code
> was incorrectly setting the DMA address to the beginning of the TCE
> range.
>
> Mellanox driver is reporting timeout trying to ENABLE_HCA for an SR-IOV
> ethernet port, when DMA window is backed by 2MB TCEs.
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/iommu: DMA address offset is incorrectly calculated with 2MB TCEs
https://git.kernel.org/powerpc/c/096339ab84f36beae0b1db25e0ce63fb3873e8b2
cheers
prev parent reply other threads:[~2023-07-03 5:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-04 17:59 [PATCH v3] powerpc/iommu: DMA address offset is incorrectly calculated with 2MB TCEs Gaurav Batra
2023-05-22 7:27 ` Srikar Dronamraju
2023-07-03 5:21 ` Michael Ellerman [this message]
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