From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: linuxppc-dev@lists.ozlabs.org
Cc: Sam Bobroff <sbobroff@linux.ibm.com>,
Alistair Popple <alistair@popple.id.au>,
Oliver O'Halloran <oohall@gmail.com>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH kernel v5 0/4] powerpc/ioda2: Yet another attempt to allow DMA masks between 32 and 59
Date: Thu, 18 Jul 2019 15:11:35 +1000 [thread overview]
Message-ID: <20190718051139.74787-1-aik@ozlabs.ru> (raw)
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 an optimization and not a bug fix for DMA API usage.
Changelogs are in the patches.
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 | 7 +-
arch/powerpc/platforms/powernv/pci.h | 2 +-
arch/powerpc/kernel/dma-iommu.c | 11 ++-
arch/powerpc/kernel/iommu.c | 74 +++++++++++++------
arch/powerpc/platforms/cell/iommu.c | 2 +-
arch/powerpc/platforms/pasemi/iommu.c | 2 +-
arch/powerpc/platforms/powernv/pci-ioda-tce.c | 38 ++++++----
arch/powerpc/platforms/powernv/pci-ioda.c | 42 +++++++++--
arch/powerpc/platforms/pseries/iommu.c | 8 +-
arch/powerpc/platforms/pseries/vio.c | 2 +-
arch/powerpc/sysdev/dart_iommu.c | 2 +-
11 files changed, 129 insertions(+), 61 deletions(-)
--
2.17.1
next reply other threads:[~2019-07-18 5:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-18 5:11 Alexey Kardashevskiy [this message]
2019-07-18 5:11 ` [PATCH kernel v5 1/4] powerpc/powernv/ioda: Fix race in TCE level allocation Alexey Kardashevskiy
2019-08-22 13:08 ` Michael Ellerman
2019-07-18 5:11 ` [PATCH kernel v5 2/4] powerpc/iommu: Allow bypass-only for DMA Alexey Kardashevskiy
2019-07-18 5:11 ` [PATCH kernel v5 3/4] powerpc/powernv/ioda2: Allocate TCE table levels on demand for default DMA window Alexey Kardashevskiy
2019-07-18 5:11 ` [PATCH kernel v5 4/4] powerpc/powernv/ioda2: Create bigger default window with 64k IOMMU pages Alexey Kardashevskiy
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