Thread (34 messages) 34 messages, 7 authors, 2025-10-06

Re: [PATCH v1 4/9] powerpc: Convert to physical address DMA mapping

From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2025-10-03 16:35:19
Also in: linux-alpha, linux-iommu, linux-mips, lkml, sparclinux, virtualization, xen-devel

On Sun, Sep 28, 2025 at 06:02:24PM +0300, Leon Romanovsky wrote:
From: Leon Romanovsky <leonro@nvidia.com>

Adapt PowerPC DMA to use physical addresses in order to prepare code
to removal .map_page and .unmap_page.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 arch/powerpc/include/asm/iommu.h         |  8 +++---
 arch/powerpc/kernel/dma-iommu.c          | 22 +++++++---------
 arch/powerpc/kernel/iommu.c              | 14 +++++-----
 arch/powerpc/platforms/ps3/system-bus.c  | 33 ++++++++++++++----------
 arch/powerpc/platforms/pseries/ibmebus.c | 15 ++++++-----
 arch/powerpc/platforms/pseries/vio.c     | 21 ++++++++-------
 6 files changed, 60 insertions(+), 53 deletions(-)
I think this is good enough for PPC anything more looks quite hard

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Jason
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