[dpdk-dev] [PATCH v4 44/70] net/mlx5: use virt2memseg instead of iteration

[gowrishankar muthukrishnan]

On Monday 09 April 2018 01:48 AM, Anatoly Burakov wrote:
> Reduce dependency on internal details of EAL memory subsystem, and
> simplify code.
>
> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
> ---
>   drivers/net/mlx5/mlx5_mr.c | 18 ++++++++----------
>   1 file changed, 8 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/net/mlx5/mlx5_mr.c b/drivers/net/mlx5/mlx5_mr.c
> index 2bf1f9c..d8c04dc 100644
> --- a/drivers/net/mlx5/mlx5_mr.c
> +++ b/drivers/net/mlx5/mlx5_mr.c
> @@ -234,7 +234,7 @@ struct mlx5_mr *
>   mlx5_mr_new(struct rte_eth_dev *dev, struct rte_mempool *mp)
>   {
>   	struct priv *priv = dev->data->dev_private;
> -	const struct rte_memseg *ms = rte_eal_get_physmem_layout();
> +	const struct rte_memseg *ms;
>   	uintptr_t start;
>   	uintptr_t end;
>   	unsigned int i;

Unused variable 'i' to be removed.

Thanks,
Gowrishankar

> @@ -261,17 +261,15 @@ mlx5_mr_new(struct rte_eth_dev *dev, struct rte_mempool *mp)
>   	/* Save original addresses for exact MR lookup. */
>   	mr->start = start;
>   	mr->end = end;
> +
>   	/* Round start and end to page boundary if found in memory segments. */
> -	for (i = 0; (i < RTE_MAX_MEMSEG) && (ms[i].addr != NULL); ++i) {
> -		uintptr_t addr = (uintptr_t)ms[i].addr;
> -		size_t len = ms[i].len;
> -		unsigned int align = ms[i].hugepage_sz;
> +	ms = rte_mem_virt2memseg((void *)start);
> +	if (ms != NULL)
> +		start = RTE_ALIGN_FLOOR(start, ms->hugepage_sz);
> +	ms = rte_mem_virt2memseg((void *)end);
> +	if (ms != NULL)
> +		end = RTE_ALIGN_CEIL(end, ms->hugepage_sz);
>
> -		if ((start > addr) && (start < addr + len))
> -			start = RTE_ALIGN_FLOOR(start, align);
> -		if ((end > addr) && (end < addr + len))
> -			end = RTE_ALIGN_CEIL(end, align);
> -	}
>   	DRV_LOG(DEBUG,
>   		"port %u mempool %p using start=%p end=%p size=%zu for memory"
>   		" region",