mlx5: DR, Using sq ts format when RoCE is disabled

[ Upstream commit cebd491 ]

When creating a QP in SW steering, one of the attributes is TS format
(timestamp). In some devices, we have a limitation that all QPs should
have the same ts_format.

The qp_ts_format cap resides under the RoCE caps table, and the cap is
not queried when RoCE is disabled.
Consider the case when the system is configured to run with REAL_TIME_TS
format (0x2), some QPs are created, and we disable RoCE.
When trying to construct a new QP, we can't use the qp_ts_format, that
is queried from the RoCE caps table.
That leads to passing 0x0 (FREE_RUNNING_TS) as the value of the
qp_ts_format, which is different than the ts_format of the previous QPs
REAL_TIME_TS format (0x2) and the creation will fail.

To resolve this, we will read the sq_ts_format, which also reflect the
supported ts format for the QP when RoCE is disabled, and override it
with qp_ts_format from the RoCE caps table if RoCE is enabled.

Fixes: ed504ab ("mlx5: DR, Set QP timestamp mode to default")
Signed-off-by: Itamar Gozlan <igozlan@nvidia.com>
Signed-off-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Nicolas Morey <nmorey@suse.com>

providers/mlx5/dr_devx.c

@@ -243,6 +243,9 @@ int dr_devx_query_device(struct ibv_context *ctx, struct dr_devx_caps *caps)
 	caps->roce_caps.fl_rc_qp_when_roce_disabled = DEVX_GET(query_hca_cap_out, out,
 					capability.cmd_hca_cap.fl_rc_qp_when_roce_disabled);
 
+	caps->roce_caps.qp_ts_format = DEVX_GET(query_hca_cap_out, out,
+						capability.cmd_hca_cap.sq_ts_format);
+
 	if (caps->support_modify_argument) {
 		caps->log_header_modify_argument_granularity =
 			DEVX_GET(query_hca_cap_out, out,

providers/mlx5/mlx5_ifc.h

@@ -1183,7 +1183,8 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 
 	u8         general_obj_types[0x40];
 
-	u8         reserved_at_440[0x4];
+	u8         sq_ts_format[0x2];
+	u8         rq_ts_format[0x2];
 	u8         steering_format_version[0x4];
 	u8         create_qp_start_hint[0x18];