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