Re: [PATCH 1/4] dmaengine: idxd: assign all engines to group 0 in IAA defaults

[Dave Jiang <dave.jiang@intel.com>]

On 7/13/26 9:10 PM, Vinicius Costa Gomes wrote:
> From: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
> 
> The IAA device defaults only assigned engine 0 to group 0, leaving
> engines 1 through max_engines-1 unassigned (group_id = -1). This means
> that by default only a single engine processed descriptors, limiting
> throughput to one engine's capacity.
> 
> Assign all available engines to group 0 so that the full hardware
> parallelism is used out of the box without requiring manual
> accel-config setup.
> 
> Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>


> ---
>  drivers/dma/idxd/defaults.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/dma/idxd/defaults.c b/drivers/dma/idxd/defaults.c
> index 2bbbcd02a0da..26ebfa2ca144 100644
> --- a/drivers/dma/idxd/defaults.c
> +++ b/drivers/dma/idxd/defaults.c
> @@ -8,6 +8,7 @@ int idxd_load_iaa_device_defaults(struct idxd_device *idxd)
>  	struct idxd_engine *engine;
>  	struct idxd_group *group;
>  	struct idxd_wq *wq;
> +	int i;
>  
>  	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
>  		return 0;
> @@ -41,11 +42,12 @@ int idxd_load_iaa_device_defaults(struct idxd_device *idxd)
>  	/* set driver_name to "crypto" */
>  	strscpy_pad(wq->driver_name, "crypto");
>  
> -	engine = idxd->engines[0];
> -
> -	/* set engine group to 0 */
> -	engine->group = idxd->groups[0];
> -	engine->group->num_engines++;
> +	/* assign all engines to group 0 */
> +	for (i = 0; i < idxd->max_engines; i++) {
> +		engine = idxd->engines[i];
> +		engine->group = group;
> +		group->num_engines++;
> +	}
>  
>  	return 0;
>  }
>