mbox series

[kernel,v2,0/2] DMA, powerpc/dma: Fallback to dma_ops when persistent memory present

Message ID 20201027101841.96056-1-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. 27, 2020, 10:18 a.m. UTC 
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(-)