linux-kernel - [PATCH kernel v4 0/4] powerpc/ioda2: Yet another attempt to allow DMA masks between 32 and 59

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Date:   Fri, 12 Jul 2019 19:29:51 +1000
From:   Alexey Kardashevskiy <aik@...abs.ru>
To:     linux-kernel@...r.kernel.org
Cc:     "Oliver O'Halloran" <oohall@...il.com>,
        David Gibson <david@...son.dropbear.id.au>,
        Sam Bobroff <sbobroff@...ux.ibm.com>,
        Alistair Popple <alistair@...ple.id.au>,
        Alexey Kardashevskiy <aik@...abs.ru>
Subject: [PATCH kernel v4 0/4] powerpc/ioda2: Yet another attempt to allow DMA masks between 32 and 59

This is an attempt to allow DMA masks between 32..59 which are not large
enough to use either a PHB3 bypass mode or a sketchy bypass. Depending
on the max order, up to 40 is usually available.


This is based on sha1
a2b6f26c264e Christophe Leroy "powerpc/module64: Use symbolic instructions names.".

Please comment. Thanks.



Alexey Kardashevskiy (4):
  powerpc/powernv/ioda: Fix race in TCE level allocation
  powerpc/iommu: Allow bypass-only for DMA
  powerpc/powernv/ioda2: Allocate TCE table levels on demand for default
    DMA window
  powerpc/powernv/ioda2: Create bigger default window with 64k IOMMU
    pages

 arch/powerpc/include/asm/iommu.h              |  8 +-
 arch/powerpc/platforms/powernv/pci.h          |  2 +-
 arch/powerpc/kernel/dma-iommu.c               | 11 ++-
 arch/powerpc/kernel/iommu.c                   | 74 +++++++++++++------
 arch/powerpc/platforms/powernv/pci-ioda-tce.c | 38 ++++++----
 arch/powerpc/platforms/powernv/pci-ioda.c     | 40 ++++++++--
 6 files changed, 121 insertions(+), 52 deletions(-)

-- 
2.17.1