From 297cc2c6323514a69b57aeeb5207cf63e5e2549b Mon Sep 17 00:00:00 2001
From: Bodong Wang <bodong@nvidia.com>
Date: Tue, 27 Oct 2020 08:59:02 -0500
Subject: [PATCH] mlx5: DR, Create NC UAR as default but fall-back to WC if
failed
[ Upstream commit 40b8e48792a423da1ceeaf58ac8eee81e9e0194a ]
Some devices may only support either NC or WC UAR. To handle such
devices, first try to create NC, then try WC if NC failed.
Fixes: 84ac5272a05a ("mlx5: Enhance mlx5dv_devx_alloc_uar() functionality")
Signed-off-by: Bodong Wang <bodong@nvidia.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
providers/mlx5/dr_domain.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/providers/mlx5/dr_domain.c b/providers/mlx5/dr_domain.c
index b47c5841f624..5b8739dca2ef 100644
--- a/providers/mlx5/dr_domain.c
+++ b/providers/mlx5/dr_domain.c
@@ -50,7 +50,13 @@ static int dr_domain_init_resources(struct mlx5dv_dr_domain *dmn)
return ret;
}
- dmn->uar = mlx5dv_devx_alloc_uar(dmn->ctx, 0);
+ dmn->uar = mlx5dv_devx_alloc_uar(dmn->ctx,
+ MLX5_IB_UAPI_UAR_ALLOC_TYPE_NC);
+
+ if (!dmn->uar)
+ dmn->uar = mlx5dv_devx_alloc_uar(dmn->ctx,
+ MLX5_IB_UAPI_UAR_ALLOC_TYPE_BF);
+
if (!dmn->uar) {
dr_dbg(dmn, "Can't allocate UAR\n");
goto clean_pd;
--
2.25.4