[v10] igc: Add support for Frame Preemption feature in IGC

[PATCH iwl-next v10 12/14] igc: block setting preemptible traffic class in taprio

Posted by Faizal Rahim 9 months ago

Since preemptible tc implementation is not ready yet, block it from being
set in taprio. The existing code already blocks it in mqprio.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 71c377cb7a88..fc945c5b7c70 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -6486,6 +6486,10 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
 	if (!validate_schedule(adapter, qopt))
 		return -EINVAL;
 
+	/* preemptible isn't supported yet */
+	if (qopt->mqprio.preemptible_tcs)
+		return -EOPNOTSUPP;
+
 	igc_ptp_read(adapter, &now);
 
 	if (igc_tsn_is_taprio_activated_by_user(adapter) &&
-- 
2.34.1

Re: [Intel-wired-lan] [PATCH iwl-next v10 12/14] igc: block setting preemptible traffic class in taprio

Posted by Mor Bar-Gabay 8 months, 3 weeks ago

On 18/03/2025 5:07, Faizal Rahim wrote:
> Since preemptible tc implementation is not ready yet, block it from being
> set in taprio. The existing code already blocks it in mqprio.
> 
> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
> Signed-off-by: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>
> ---
>   drivers/net/ethernet/intel/igc/igc_main.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
Tested-by: Mor Bar-Gabay <morx.bar.gabay@intel.com>