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UCT/IB/MLX5: Fix DEVX for not WC-supported UAR #11310

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Merged
gleon99 merged 2 commits into from
Apr 9, 2026
+11 −1
Merged

UCT/IB/MLX5: Fix DEVX for not WC-supported UAR #11310

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fb2a9b2
UCT/IB/MLX5: Fix DEVX for not WC-supported UAR
nbellalou Mar 31, 2026
ce774ef
UCT/IB/MLX5: PR fix - code convention
nbellalou Mar 31, 2026
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7 changes: 6 additions & 1 deletion src/uct/ib/mlx5/dv/ib_mlx5_dv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -141,11 +141,16 @@ ucs_status_t uct_ib_mlx5_devx_create_qp_common(uct_ib_iface_t *iface,
uct_ib_mlx5_devx_uar_t *uar;
ucs_status_t status;
void *qpc;
uint64_t bf_size = 0;

uct_ib_iface_fill_attr(iface, &attr->super);

if (md->flags & UCT_IB_MLX5_MD_FLAG_UAR_USE_WC) {
bf_size = UCT_IB_MLX5_BF_REG_SIZE;
}

status = uct_ib_mlx5_get_mmio_mode(iface->super.worker, attr->mmio_mode, 0,
UCT_IB_MLX5_BF_REG_SIZE, &mmio_mode);
bf_size, &mmio_mode);
if (status != UCS_OK) {
goto err;
}
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5 changes: 5 additions & 0 deletions src/uct/ib/mlx5/rc/rc_mlx5_common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1046,6 +1046,11 @@ uct_rc_mlx5_iface_common_dm_init(uct_rc_mlx5_iface_common_t *iface,
goto fallback;
}

if (!(uct_ib_mlx5_iface_md(&rc_iface->super)->flags &
UCT_IB_MLX5_MD_FLAG_UAR_USE_WC)) {
goto fallback;
}

iface->dm.dm = uct_worker_tl_data_get(iface->super.super.super.worker,
UCT_IB_MLX5_WORKER_DM_KEY,
uct_mlx5_dm_data_t,
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