linux-kernel - [PATCH kernel v2 0/2] DMA, powerpc/dma: Fallback to dma

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Message-Id: <20201027101841.96056-1-aik@ozlabs.ru>
Date:   Tue, 27 Oct 2020 21:18:39 +1100
From:   Alexey Kardashevskiy <aik@...abs.ru>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     Christoph Hellwig <hch@....de>,
        Michael Ellerman <mpe@...erman.id.au>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Alexey Kardashevskiy <aik@...abs.ru>
Subject: [PATCH kernel v2 0/2] DMA, powerpc/dma: Fallback to dma_ops when persistent memory present

This allows mixing direct DMA (to/from RAM) and
IOMMU (to/from apersistent memory) on the PPC64/pseries
platform.

This replaces this: https://lkml.org/lkml/2020/10/20/1085
A lesser evil this is :)

This is based on sha1
4525c8781ec0 Linus Torvalds "scsi: qla2xxx: remove incorrect sparse #ifdef".

Please comment. Thanks.



Alexey Kardashevskiy (2):
  dma: Allow mixing bypass and normal IOMMU operation
  powerpc/dma: Fallback to dma_ops when persistent memory present

 arch/powerpc/kernel/dma-iommu.c        | 12 ++++-
 arch/powerpc/platforms/pseries/iommu.c | 44 ++++++++++++++-----
 kernel/dma/mapping.c                   | 61 +++++++++++++++++++++++++-
 arch/powerpc/Kconfig                   |  1 +
 kernel/dma/Kconfig                     |  4 ++
 5 files changed, 108 insertions(+), 14 deletions(-)

-- 
2.17.1