IB/mlx5: Expose CQE version to user-space
Per user context, work with CQE version that both the user-space
and the kernel support. Report this CQE version via the response of
the alloc_ucontext command.
Signed-off-by: Haggai Abramovsky <hagaya@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index f823366..829c37c 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -869,7 +869,7 @@
if (req.total_num_uuars == 0)
return ERR_PTR(-EINVAL);
- if (req.comp_mask)
+ if (req.comp_mask || req.reserved0 || req.reserved1 || req.reserved2)
return ERR_PTR(-EOPNOTSUPP);
if (reqlen > sizeof(req) &&
@@ -892,6 +892,9 @@
resp.max_send_wqebb = 1 << MLX5_CAP_GEN(dev->mdev, log_max_qp_sz);
resp.max_recv_wr = 1 << MLX5_CAP_GEN(dev->mdev, log_max_qp_sz);
resp.max_srq_recv_wr = 1 << MLX5_CAP_GEN(dev->mdev, log_max_srq_sz);
+ resp.cqe_version = min_t(__u8,
+ (__u8)MLX5_CAP_GEN(dev->mdev, cqe_version),
+ req.max_cqe_version);
resp.response_length = min(offsetof(typeof(resp), response_length) +
sizeof(resp.response_length), udata->outlen);
@@ -945,8 +948,8 @@
resp.tot_uuars = req.total_num_uuars;
resp.num_ports = MLX5_CAP_GEN(dev->mdev, num_ports);
- if (field_avail(typeof(resp), reserved2, udata->outlen))
- resp.response_length += sizeof(resp.reserved2);
+ if (field_avail(typeof(resp), cqe_version, udata->outlen))
+ resp.response_length += sizeof(resp.cqe_version);
if (field_avail(typeof(resp), hca_core_clock_offset, udata->outlen)) {
resp.comp_mask |=
@@ -954,7 +957,9 @@
resp.hca_core_clock_offset =
offsetof(struct mlx5_init_seg, internal_timer_h) %
PAGE_SIZE;
- resp.response_length += sizeof(resp.hca_core_clock_offset);
+ resp.response_length += sizeof(resp.hca_core_clock_offset) +
+ sizeof(resp.reserved2) +
+ sizeof(resp.reserved3);
}
err = ib_copy_to_udata(udata, &resp, resp.response_length);
@@ -965,6 +970,8 @@
uuari->num_low_latency_uuars = req.num_low_latency_uuars;
uuari->uars = uars;
uuari->num_uars = num_uars;
+ context->cqe_version = resp.cqe_version;
+
return &context->ibucontext;
out_uars: