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[kernel,v3,0/2] DMA, powerpc/dma: Fallback to dma_ops when persistent memory present

Message ID 20201028070030.60643-1-aik@ozlabs.ru (mailing list archive)
Headers show
Series DMA, powerpc/dma: Fallback to dma_ops when persistent memory present | expand

Message

Alexey Kardashevskiy Oct. 28, 2020, 7 a.m. UTC 
This allows mixing direct DMA (to/from RAM) and
IOMMU (to/from apersistent memory) on the PPC64/pseries
platform.

This replaces https://lkml.org/lkml/2020/10/27/418
which replaces https://lkml.org/lkml/2020/10/20/1085


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 mapped DMA operation
  powerpc/dma: Fallback to dma_ops when persistent memory present

 arch/powerpc/kernel/dma-iommu.c        | 70 +++++++++++++++++++++++++-
 arch/powerpc/platforms/pseries/iommu.c | 44 ++++++++++++----
 kernel/dma/mapping.c                   | 24 +++++++--
 arch/powerpc/Kconfig                   |  1 +
 kernel/dma/Kconfig                     |  4 ++
 5 files changed, 127 insertions(+), 16 deletions(-)