From: Robin Murphy <robin.murphy@arm.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Joerg Roedel <joro@8bytes.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/21] dma-mapping: add a Kconfig symbol to indicated arch_dma_prep_coherent presence
Date: Fri, 5 Apr 2019 18:41:02 +0100 [thread overview]
Message-ID: <7c464875-b23a-9da4-afe7-93d7879ca3b8@arm.com> (raw)
In-Reply-To: <20190327080448.5500-4-hch@lst.de>
On 27/03/2019 08:04, Christoph Hellwig wrote:
> Add a Kconfig symbol that indicates an architecture provides a
> arch_dma_prep_coherent implementation, and provide a stub otherwise.
>
> This will allow the generic dma-iommu code to it while still allowing
I think you accidentally a word there.
> to be built for cache coherent architectures.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> arch/arm64/Kconfig | 1 +
> arch/csky/Kconfig | 1 +
> include/linux/dma-noncoherent.h | 6 ++++++
> kernel/dma/Kconfig | 3 +++
> 4 files changed, 11 insertions(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 7e34b9eba5de..adda078d6df7 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -13,6 +13,7 @@ config ARM64
> select ARCH_HAS_DEVMEM_IS_ALLOWED
> select ARCH_HAS_DMA_COHERENT_TO_PFN
> select ARCH_HAS_DMA_MMAP_PGPROT
> + select ARCH_HAS_DMA_PREP_COHERENT
> select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
> select ARCH_HAS_ELF_RANDOMIZE
> select ARCH_HAS_FAST_MULTIPLIER
> diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
> index 725a115759c9..2c3178848b7d 100644
> --- a/arch/csky/Kconfig
> +++ b/arch/csky/Kconfig
> @@ -1,6 +1,7 @@
> config CSKY
> def_bool y
> select ARCH_32BIT_OFF_T
> + select ARCH_HAS_DMA_PREP_COHERENT
> select ARCH_HAS_SYNC_DMA_FOR_CPU
> select ARCH_HAS_SYNC_DMA_FOR_DEVICE
> select ARCH_USE_BUILTIN_BSWAP
> diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h
> index 69b36ed31a99..9741767e400f 100644
> --- a/include/linux/dma-noncoherent.h
> +++ b/include/linux/dma-noncoherent.h
> @@ -72,6 +72,12 @@ static inline void arch_sync_dma_for_cpu_all(struct device *dev)
> }
> #endif /* CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL */
>
> +#ifdef CONFIG_ARCH_HAS_DMA_PREP_COHERENT
> void arch_dma_prep_coherent(struct page *page, size_t size);
> +#else
> +static inline void arch_dma_prep_coherent(struct page *page, size_t size)
> +{
> +}
> +#endif /* CONFIG_ARCH_HAS_DMA_PREP_COHERENT */
>
> #endif /* _LINUX_DMA_NONCOHERENT_H */
> diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
> index a06ba3013b3b..feff2d21d8ee 100644
> --- a/kernel/dma/Kconfig
> +++ b/kernel/dma/Kconfig
> @@ -38,6 +38,9 @@ config ARCH_HAS_SYNC_DMA_FOR_CPU
> config ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
> bool
>
> +config ARCH_HAS_DMA_PREP_COHERENT
> + bool
> +
I guess the sorting in this whole Kconfig is already more or less
"randomly-perturbed semi-alphabetical" :(
Anyway,
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> config ARCH_HAS_DMA_COHERENT_TO_PFN
> bool
>
>
next prev parent reply other threads:[~2019-04-05 17:41 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 8:04 implement generic dma_map_ops for IOMMUs v2 [rebase + resend] Christoph Hellwig
2019-03-27 8:04 ` [PATCH 01/21] arm64/iommu: handle non-remapped addresses in ->mmap and ->get_sgtable Christoph Hellwig
2019-04-05 17:16 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 02/21] arm64/iommu: improve mmap bounds checking Christoph Hellwig
2019-04-05 17:30 ` Robin Murphy
2019-04-07 6:59 ` Christoph Hellwig
2019-04-09 15:12 ` Robin Murphy
2019-04-09 17:09 ` Christoph Hellwig
2019-03-27 8:04 ` [PATCH 03/21] dma-mapping: add a Kconfig symbol to indicated arch_dma_prep_coherent presence Christoph Hellwig
2019-04-05 17:41 ` Robin Murphy [this message]
2019-03-27 8:04 ` [PATCH 04/21] dma-iommu: cleanup dma-iommu.h Christoph Hellwig
2019-04-05 17:42 ` Robin Murphy
2019-04-09 17:10 ` Christoph Hellwig
2019-03-27 8:04 ` [PATCH 05/21] dma-iommu: remove the flush_page callback Christoph Hellwig
2019-04-05 17:46 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 06/21] dma-iommu: use for_each_sg in iommu_dma_alloc Christoph Hellwig
2019-04-05 18:08 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 07/21] dma-iommu: move the arm64 wrappers to common code Christoph Hellwig
2019-04-09 15:07 ` Robin Murphy
2019-04-09 17:15 ` Christoph Hellwig
2019-04-09 17:23 ` Christoph Hellwig
2019-04-09 17:33 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 08/21] dma-iommu: refactor iommu_dma_mmap Christoph Hellwig
2019-04-09 15:29 ` Robin Murphy
2019-04-09 17:25 ` Christoph Hellwig
2019-03-27 8:04 ` [PATCH 09/21] dma-iommu: refactor iommu_dma_get_sgtable Christoph Hellwig
2019-04-09 15:49 ` Robin Murphy
2019-04-09 17:26 ` Christoph Hellwig
2019-03-27 8:04 ` [PATCH 10/21] dma-iommu: move __iommu_dma_map Christoph Hellwig
2019-04-09 15:54 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 11/21] dma-iommu: refactor page array remap helpers Christoph Hellwig
2019-04-09 16:38 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 12/21] dma-iommu: factor atomic pool allocations into helpers Christoph Hellwig
2019-04-09 17:59 ` Robin Murphy
2019-04-10 6:11 ` Christoph Hellwig
2019-04-17 6:33 ` Christoph Hellwig
2019-04-17 11:54 ` Robin Murphy
2019-04-18 15:06 ` Robin Murphy
2019-04-18 16:35 ` Christoph Hellwig
2019-04-18 16:41 ` Robin Murphy
2019-04-19 9:07 ` Christoph Hellwig
2019-04-23 9:48 ` Robin Murphy
2019-04-18 18:15 ` Robin Murphy
2019-04-19 8:23 ` Christoph Hellwig
2019-04-23 10:01 ` Robin Murphy
2019-04-23 14:52 ` Christoph Hellwig
2019-04-29 11:49 ` Christoph Hellwig
2019-04-29 12:02 ` Robin Murphy
2019-04-22 18:03 ` Christoph Hellwig
2019-03-27 8:04 ` [PATCH 13/21] dma-iommu: factor contiguous " Christoph Hellwig
2019-03-27 8:04 ` [PATCH 14/21] dma-iommu: refactor iommu_dma_free Christoph Hellwig
2019-03-27 8:04 ` [PATCH 15/21] dma-iommu: don't remap contiguous allocations for coherent devices Christoph Hellwig
2019-03-27 8:04 ` [PATCH 16/21] dma-iommu: factor contiguous remapped allocations into helpers Christoph Hellwig
2019-03-27 8:04 ` [PATCH 17/21] dma-iommu: refactor iommu_dma_alloc Christoph Hellwig
2019-03-27 8:04 ` [PATCH 18/21] dma-iommu: don't depend on CONFIG_DMA_DIRECT_REMAP Christoph Hellwig
2019-03-27 8:04 ` [PATCH 19/21] dma-iommu: switch copyright boilerplace to SPDX Christoph Hellwig
2019-03-27 8:04 ` [PATCH 20/21] arm64: switch copyright boilerplace to SPDX in dma-mapping.c Christoph Hellwig
2019-04-01 6:28 ` Mukesh Ojha
2019-04-01 9:39 ` Robin Murphy
2019-03-27 8:04 ` [PATCH 21/21] arm64: trim includes " Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2019-02-13 18:28 implement generic dma_map_ops for IOMMUs v2 Christoph Hellwig
2019-02-13 18:29 ` [PATCH 03/21] dma-mapping: add a Kconfig symbol to indicated arch_dma_prep_coherent presence Christoph Hellwig
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