linux-kernel - Re: [PATCH v4 03/38] iommu: add generic helper for mapping sgtable objects

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Message-ID: <20200513090320.GH9820@8bytes.org>
Date:   Wed, 13 May 2020 11:03:21 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     dri-devel@...ts.freedesktop.org, iommu@...ts.linux-foundation.org,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        Robin Murphy <robin.murphy@....com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-arm-kernel@...ts.infradead.org,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v4 03/38] iommu: add generic helper for mapping sgtable
 objects

Hi Marek,

On Tue, May 12, 2020 at 11:00:23AM +0200, Marek Szyprowski wrote:
> ---
>  include/linux/iommu.h | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)

Some nits below, with those fixed:

	Acked-by: Joerg Roedel <jroedel@...e.de>

> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index 7cfd2dd..ba662ba 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -478,6 +478,22 @@ extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
>  extern void iommu_set_fault_handler(struct iommu_domain *domain,
>  			iommu_fault_handler_t handler, void *token);
>  
> +/**
> + * iommu_map_sgtable - Map the given buffer to the IOMMU domain
> + * @domain:	The IOMMU domain to perfor
                                    ^^^^^^ Truncated comment?
> + * @iova:	The start addrees to map the buffer
                          ^^^^^^^ Typo

> + * @sgt:	The sg_table object describing the buffer
> + * @prot:	IOMMU protection bits
> + *
> + * Create a mapping at @iova for the buffer described by a scatterlist
> + * stored in the given sg_table object in the provided IOMMU domain.
> + */
> +static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
> +			unsigned long iova, struct sg_table *sgt, int prot)
> +{
> +	return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
> +}
> +
>  extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
>  extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
>  extern void generic_iommu_put_resv_regions(struct device *dev,
> -- 
> 1.9.1