From e8f05161eb6b11d75a6402b342ff251cc6eb75b6 Mon Sep 17 00:00:00 2001 From: Viacheslav Ovsiienko Date: Tue, 10 Nov 2020 16:04:17 +0000 Subject: [PATCH] regex/mlx5: fix UAR allocation This patch provides the UAR allocation workaround for the hosts where UAR allocation with Write-Combining memory mapping type fails. Fixes: b34d816363b5 ("regex/mlx5: support rules import") Cc: stable@dpdk.org Signed-off-by: Viacheslav Ovsiienko Acked-by: Matan Azrad --- drivers/regex/mlx5/mlx5_regex.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/regex/mlx5/mlx5_regex.c b/drivers/regex/mlx5/mlx5_regex.c index 17590b937c..05048e7bdc 100644 --- a/drivers/regex/mlx5/mlx5_regex.c +++ b/drivers/regex/mlx5/mlx5_regex.c @@ -176,7 +176,12 @@ mlx5_regex_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, rte_errno = ENOMEM; goto error; } - priv->uar = mlx5_glue->devx_alloc_uar(ctx, 0); + /* + * This PMD always claims the write memory barrier on UAR + * registers writings, it is safe to allocate UAR with any + * memory mapping type. + */ + priv->uar = mlx5_devx_alloc_uar(ctx, -1); if (!priv->uar) { DRV_LOG(ERR, "can't allocate uar."); rte_errno = ENOMEM; -- 2.20.1