From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Christoph Hellwig <hch@lst.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc: use the generic dma coherent remap allocator
Date: Wed, 14 Aug 2019 16:21:42 +0200 [thread overview]
Message-ID: <fd5df886-bd2e-8023-47aa-16d41973a8d3@c-s.fr> (raw)
In-Reply-To: <20190814132230.31874-2-hch@lst.de>
Le 14/08/2019 à 15:22, Christoph Hellwig a écrit :
> This switches to using common code for the DMA allocations, including
> potential use of the CMA allocator if configured.
>
> Switching to the generic code enables DMA allocations from atomic
> context, which is required by the DMA API documentation, and also
> adds various other minor features drivers start relying upon. It
> also makes sure we have on tested code base for all architectures
> that require uncached pte bits for coherent DMA allocations.
>
> Another advantage is that consistent memory allocations now share
> the general vmalloc pool instead of needing an explicit careout
> from it.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> # tested on 8xx
> ---
> arch/powerpc/Kconfig | 12 -
> arch/powerpc/include/asm/book3s/32/pgtable.h | 12 +-
> arch/powerpc/include/asm/nohash/32/pgtable.h | 12 +-
> arch/powerpc/mm/dma-noncoherent.c | 318 +------------------
> arch/powerpc/mm/mem.c | 4 -
> arch/powerpc/mm/ptdump/ptdump.c | 9 -
> arch/powerpc/platforms/Kconfig.cputype | 2 +
> 7 files changed, 17 insertions(+), 352 deletions(-)
>
next prev parent reply other threads:[~2019-08-14 14:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 13:22 use the generic DMA direct remap code on powerpc Christoph Hellwig
2019-08-14 13:22 ` [PATCH] powerpc: use the generic dma coherent remap allocator Christoph Hellwig
2019-08-14 14:20 ` Christophe Leroy
2019-08-14 14:23 ` Christoph Hellwig
2019-08-14 14:21 ` Christophe Leroy [this message]
2019-08-28 6:10 ` Christoph Hellwig
2019-08-28 13:34 ` Michael Ellerman
2019-08-28 14:25 ` Christoph Hellwig
2019-08-29 9:42 ` Michael Ellerman
2019-09-02 3:29 ` Michael Ellerman
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