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regex/mlx5: fix UAR allocation

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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 <viacheslavo@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
This commit is contained in:
Viacheslav Ovsiienko 2020-11-10 16:04:17 +00:00 committed by Thomas Monjalon
parent 9cc0e99c81
commit e8f05161eb
1 changed files with 6 additions and 1 deletions
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7
drivers/regex/mlx5/mlx5_regex.c
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@ -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;