[PATCH] lib/dmadev: get DMA device using device ID

[fengchengwen]

Hi Amit,

On 2023/12/8 15:55, Amit Prakash Shukla wrote:
> DMA library has a function to get DMA device based on device name but
> there is no function to get DMA device using device id.
> 
> Added a function that lookup for the dma device using device id and
> returns the pointer to the same.
> 
> Signed-off-by: Amit Prakash Shukla <amitprakashs at marvell.com>
> ---
>  lib/dmadev/rte_dmadev.c     |  9 +++++++++
>  lib/dmadev/rte_dmadev_pmd.h | 14 ++++++++++++++
>  lib/dmadev/version.map      |  1 +
>  3 files changed, 24 insertions(+)
> 
> diff --git a/lib/dmadev/rte_dmadev.c b/lib/dmadev/rte_dmadev.c
> index 4e5e420c82..83f49e77f2 100644
> --- a/lib/dmadev/rte_dmadev.c
> +++ b/lib/dmadev/rte_dmadev.c
> @@ -397,6 +397,15 @@ rte_dma_is_valid(int16_t dev_id)
>  		rte_dma_devices[dev_id].state != RTE_DMA_DEV_UNUSED;
>  }
>  
> +struct rte_dma_dev *
> +rte_dma_pmd_get_dev_by_id(const int dev_id)
> +{
> +	if (!rte_dma_is_valid(dev_id))
> +		return NULL;
> +
> +	return &rte_dma_devices[dev_id];
> +}
> +
>  uint16_t
>  rte_dma_count_avail(void)
>  {
> diff --git a/lib/dmadev/rte_dmadev_pmd.h b/lib/dmadev/rte_dmadev_pmd.h
> index c61cedfb23..f68c3ac6aa 100644
> --- a/lib/dmadev/rte_dmadev_pmd.h
> +++ b/lib/dmadev/rte_dmadev_pmd.h
> @@ -167,6 +167,20 @@ struct rte_dma_dev *rte_dma_pmd_allocate(const char *name, int numa_node,
>  __rte_internal
>  int rte_dma_pmd_release(const char *name);
>  
> +/**
> + * @internal
> + * Get the rte_dma_dev structure device pointer for the device id.
> + *
> + * @param dev_id
> + *   Device ID value to select the device structure.
> + *
> + * @return
> + *   - rte_dma_dev structure pointer for the given device ID on success, NULL
> + *   otherwise.
> + */
> +__rte_internal
> +struct rte_dma_dev *rte_dma_pmd_get_dev_by_id(const int dev_id);
> +
>  #ifdef __cplusplus
>  }
>  #endif
> diff --git a/lib/dmadev/version.map b/lib/dmadev/version.map
> index 2a3736514c..2cd57c43d3 100644
> --- a/lib/dmadev/version.map
> +++ b/lib/dmadev/version.map
> @@ -26,6 +26,7 @@ INTERNAL {
>  	rte_dma_fp_objs;
>  	rte_dma_pmd_allocate;
>  	rte_dma_pmd_release;
> +	rte_dma_pmd_get_dev_by_id;

Should arranged alphabetically in version.map

With above fixed
Acked-by: Chengwen Feng <fengchengwen at huawei.com>

Thanks

>  
>  	local: *;
>  };
>