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[PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops

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  [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops Niklas Söderlund   <niklas.soderlund+renesas@ragnatech.se> - 2016-02-10 02:10 +0100
    Re: [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to  dma_map_ops Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-02-10 13:20 +0100
    Re: [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2016-02-11 01:10 +0100

#1330813 — [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops

Add methods to handle mapping of device resources from a physical
address. This is needed for example to map be able to map MMIO FIFO
registers to a IOMMU.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 include/linux/dma-mapping.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 75857cd..e3aba4e 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -49,6 +49,12 @@ struct dma_map_ops {
 			 struct scatterlist *sg, int nents,
 			 enum dma_data_direction dir,
 			 struct dma_attrs *attrs);
+	dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr,
+			       size_t size, enum dma_data_direction dir,
+			       struct dma_attrs *attrs);
+	void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle,
+			   size_t size, enum dma_data_direction dir,
+			   struct dma_attrs *attrs);
 	void (*sync_single_for_cpu)(struct device *dev,
 				    dma_addr_t dma_handle, size_t size,
 				    enum dma_data_direction dir);
-- 
2.7.1

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#1331110 — Re: [PATCH v3 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops

Hello.

On 2/10/2016 3:57 AM, Niklas Söderlund wrote:

> Add methods to handle mapping of device resources from a physical
> address. This is needed for example to map be able to map MMIO FIFO
                                          ^^^ not needed

> registers to a IOMMU.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
[...]

MBR, Sergei

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#1331592

Hi Niklas,

Thank you for the patch.

On Wednesday 10 February 2016 01:57:52 Niklas Söderlund wrote:
> Add methods to handle mapping of device resources from a physical
> address. This is needed for example to map be able to map MMIO FIFO
> registers to a IOMMU.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

Apart from the typo in the commit message that Sergei already pointed out,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  include/linux/dma-mapping.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
> index 75857cd..e3aba4e 100644
> --- a/include/linux/dma-mapping.h
> +++ b/include/linux/dma-mapping.h
> @@ -49,6 +49,12 @@ struct dma_map_ops {
>  			 struct scatterlist *sg, int nents,
>  			 enum dma_data_direction dir,
>  			 struct dma_attrs *attrs);
> +	dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr,
> +			       size_t size, enum dma_data_direction dir,
> +			       struct dma_attrs *attrs);
> +	void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle,
> +			   size_t size, enum dma_data_direction dir,
> +			   struct dma_attrs *attrs);
>  	void (*sync_single_for_cpu)(struct device *dev,
>  				    dma_addr_t dma_handle, size_t size,
>  				    enum dma_data_direction dir);

-- 
Regards,

Laurent Pinchart

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