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RDMA/mlx5: Fix validation of max_rd_atomic caps for DC 

[ Upstream commit 8de8482fe5 ]

Currently, when modifying DC, we validate max_rd_atomic user attribute
against the RC cap, validate against DC. RC and DC QP types have different
device limitations.

This can cause userspace created DC QPs to malfunction.

Fixes: c32a4f296e ("IB/mlx5: Add support for DC Initiator QP")
Link: https://lore.kernel.org/r/0c5aee72cea188c3bb770f4207cce7abc9b6fc74.1672231736.git.leonro@nvidia.com
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maor Gottlieb 2022-12-28 14:56:10 +02:00 committed by Greg Kroah-Hartman
parent 9a97da4674
commit f21c010cef
1 changed files with 35 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/infiniband/hw/mlx5/qp.c
View File

@ -4502,6 +4502,40 @@ static bool mlx5_ib_modify_qp_allowed(struct mlx5_ib_dev *dev,
return false;
}
static int validate_rd_atomic(struct mlx5_ib_dev *dev, struct ib_qp_attr *attr,
int attr_mask, enum ib_qp_type qp_type)
{
int log_max_ra_res;
int log_max_ra_req;
if (qp_type == MLX5_IB_QPT_DCI) {
log_max_ra_res = 1 << MLX5_CAP_GEN(dev->mdev,
log_max_ra_res_dc);
log_max_ra_req = 1 << MLX5_CAP_GEN(dev->mdev,
log_max_ra_req_dc);
} else {
log_max_ra_res = 1 << MLX5_CAP_GEN(dev->mdev,
log_max_ra_res_qp);
log_max_ra_req = 1 << MLX5_CAP_GEN(dev->mdev,
log_max_ra_req_qp);
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
attr->max_rd_atomic > log_max_ra_res) {
mlx5_ib_dbg(dev, "invalid max_rd_atomic value %d\n",
attr->max_rd_atomic);
return false;
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
attr->max_dest_rd_atomic > log_max_ra_req) {
mlx5_ib_dbg(dev, "invalid max_dest_rd_atomic value %d\n",
attr->max_dest_rd_atomic);
return false;
}
return true;
}
int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
@ -4589,21 +4623,8 @@ int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
goto out;
}
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
attr->max_rd_atomic >
(1 << MLX5_CAP_GEN(dev->mdev, log_max_ra_res_qp))) {
mlx5_ib_dbg(dev, "invalid max_rd_atomic value %d\n",
attr->max_rd_atomic);
if (!validate_rd_atomic(dev, attr, attr_mask, qp_type))
goto out;
}
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
attr->max_dest_rd_atomic >
(1 << MLX5_CAP_GEN(dev->mdev, log_max_ra_req_qp))) {
mlx5_ib_dbg(dev, "invalid max_dest_rd_atomic value %d\n",
attr->max_dest_rd_atomic);
goto out;
}
if (cur_state == new_state && cur_state == IB_QPS_RESET) {
err = 0;