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IB/mlx5: Fix scatter to CQE in DCT QP creation

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When scatter to CQE is enabled on a DCT QP it corrupts the mailbox command
since it tried to treat it as as QP create mailbox command instead of a
DCT create command.

The corrupted mailbox command causes userspace to malfunction as the
device doesn't create the QP as expected.

A new mlx5 capability is exposed to user-space which ensures that it will
not enable the feature on DCT without this fix in the kernel.

Fixes: 5d6ff1babe ("IB/mlx5: Support scatter to CQE for DC transport type")
Signed-off-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Guy Levi
2019-04-10 10:59:45 +03:00
committed by Jason Gunthorpe
parent 7c39f7f671
commit 7249c8ea22
3 changed files with 10 additions and 4 deletions
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11
drivers/infiniband/hw/mlx5/qp.c
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@@ -1818,13 +1818,16 @@ static void configure_responder_scat_cqe(struct ib_qp_init_attr *init_attr,
rcqe_sz = mlx5_ib_get_cqe_size(init_attr->recv_cq);
if (rcqe_sz == 128) {
MLX5_SET(qpc, qpc, cs_res, MLX5_RES_SCAT_DATA64_CQE);
if (init_attr->qp_type == MLX5_IB_QPT_DCT) {
if (rcqe_sz == 128)
MLX5_SET(dctc, qpc, cs_res, MLX5_RES_SCAT_DATA64_CQE);
return;
}
if (init_attr->qp_type != MLX5_IB_QPT_DCT)
MLX5_SET(qpc, qpc, cs_res, MLX5_RES_SCAT_DATA32_CQE);
MLX5_SET(qpc, qpc, cs_res,
rcqe_sz == 128 ? MLX5_RES_SCAT_DATA64_CQE :
MLX5_RES_SCAT_DATA32_CQE);
}
static void configure_requester_scat_cqe(struct mlx5_ib_dev *dev,