netdev - [PATCH net-next 11/12] igc: Set QBVCYCLET

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Date:   Tue, 20 Jul 2021 16:21:00 -0700
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>,
        netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
        sasha.neftin@...el.com, vitaly.lifshits@...el.com,
        Dvora Fuxbrumer <dvorax.fuxbrumer@...ux.intel.com>
Subject: [PATCH net-next 11/12] igc: Set QBVCYCLET_S to 0 for TSN Basic Scheduling

From: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>

According to datasheet section 8.12.19, when there's no TSN offloading
Shadow_QbvCycle bit[29:0] must be set to zero for basic scheduling.

Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@...ux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/igc/igc_tsn.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c
index 174103c4bea6..4dbbb8a32ce9 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.c
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.c
@@ -52,7 +52,7 @@ static int igc_tsn_disable_offload(struct igc_adapter *adapter)
 		wr32(IGC_ENDQT(i), NSEC_PER_SEC);
 	}
 
-	wr32(IGC_QBVCYCLET_S, NSEC_PER_SEC);
+	wr32(IGC_QBVCYCLET_S, 0);
 	wr32(IGC_QBVCYCLET, NSEC_PER_SEC);
 
 	adapter->flags &= ~IGC_FLAG_TSN_QBV_ENABLED;
-- 
2.26.2