[PATCH V4 1/3] arm: dma mapping: Export a dma ops function arm_dma_set_mask

[Gregory CLEMENT]

On 11/21/2012 11:00 AM, Marek Szyprowski wrote:
> Hello,
> 
> On 11/21/2012 10:39 AM, Gregory CLEMENT wrote:
>> Expose another DMA operations function: arm_dma_set_mask. This
>> function will be added to a custom DMA ops for Armada 370/XP.
>> Depending of its configuration Armada 370/XP can be set as a "nearly"
>> coherent architecture. In this case the DMA ops is made of:
>> - specific functions for this architecture
>> - already exposed arm DMA related functions
>> - the arm_dma_set_mask which was not exposed yet.
>>
>> Signed-off-by: Gregory CLEMENT <gregory.clement at free-electrons.com>
> 
> Acked-by: Marek Szyprowski <m.szyprowski at samsung.com>

Thanks!

> 
>> ---
>>   arch/arm/include/asm/dma-mapping.h |    2 ++
>>   arch/arm/mm/dma-mapping.c          |    4 +---
>>   2 files changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
>> index 2300484..98d4dab 100644
>> --- a/arch/arm/include/asm/dma-mapping.h
>> +++ b/arch/arm/include/asm/dma-mapping.h
>> @@ -111,6 +111,8 @@ static inline void dma_free_noncoherent(struct device *dev, size_t size,
>>   
>>   extern int dma_supported(struct device *dev, u64 mask);
>>   
>> +extern int arm_dma_set_mask(struct device *dev, u64 dma_mask);
>> +
>>   /**
>>    * arm_dma_alloc - allocate consistent memory for DMA
>>    * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
>> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
>> index 58bc3e4..5383bc0 100644
>> --- a/arch/arm/mm/dma-mapping.c
>> +++ b/arch/arm/mm/dma-mapping.c
>> @@ -124,8 +124,6 @@ static void arm_dma_sync_single_for_device(struct device *dev,
>>   	__dma_page_cpu_to_dev(page, offset, size, dir);
>>   }
>>   
>> -static int arm_dma_set_mask(struct device *dev, u64 dma_mask);
>> -
>>   struct dma_map_ops arm_dma_ops = {
>>   	.alloc			= arm_dma_alloc,
>>   	.free			= arm_dma_free,
>> @@ -971,7 +969,7 @@ int dma_supported(struct device *dev, u64 mask)
>>   }
>>   EXPORT_SYMBOL(dma_supported);
>>   
>> -static int arm_dma_set_mask(struct device *dev, u64 dma_mask)
>> +int arm_dma_set_mask(struct device *dev, u64 dma_mask)
>>   {
>>   	if (!dev->dma_mask || !dma_supported(dev, dma_mask))
>>   		return -EIO;
> 
> Best regards
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com