[dpdk-dev] [PATCH v4 08/12] linuxapp/eal: auto detect iova mode

[Hemant Agrawal]

On 7/18/2017 11:29 AM, Santosh Shukla wrote:
> - Moving late bus scanning to up..just after eal_parsing.
> - Auto detect iova mapping mode, based on the result of
>   rte_bus_scan_iommu_class.
>
> Signed-off-by: Santosh Shukla <santosh.shukla at caviumnetworks.com>
> Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
> ---
>  lib/librte_eal/linuxapp/eal/eal.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
> index fffdf0d15..49b52ce4f 100644
> --- a/lib/librte_eal/linuxapp/eal/eal.c
> +++ b/lib/librte_eal/linuxapp/eal/eal.c
> @@ -798,6 +798,15 @@ rte_eal_init(int argc, char **argv)
>  		return -1;
>  	}
>
> +	if (rte_bus_scan()) {
> +		rte_eal_init_alert("Cannot scan the buses for devices\n");
> +		rte_errno = ENODEV;
> +		return -1;
> +	}
> +
> +	/* autodetect the iova mapping mode (default is iova_pa) */
> +	rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class();
> +
Santosh,
      With some workaround in fslmc bus scanning/probe code. I am able 
to test it. It works ok.

Post 17.08, we will be submitting the rework of fslmc bus so that this 
patch will not break the dpaa2 platform support.

Regards,
Hemant

>  	if (internal_config.no_hugetlbfs == 0 &&
>  			internal_config.process_type != RTE_PROC_SECONDARY &&
>  			internal_config.xen_dom0_support == 0 &&
> @@ -895,12 +904,6 @@ rte_eal_init(int argc, char **argv)
>  		return -1;
>  	}
>
> -	if (rte_bus_scan()) {
> -		rte_eal_init_alert("Cannot scan the buses for devices\n");
> -		rte_errno = ENODEV;
> -		return -1;
> -	}
> -
>  	RTE_LCORE_FOREACH_SLAVE(i) {
>
>  		/*
>