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igc: Set Qbv start_time and end_time to end_time if not being configured in GCL

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[ Upstream commit 72abeedd83 ]

The default setting of end_time minus start_time is whole 1 second.
Thus, if it's not being configured in any GCL entry then it will be
staying at original 1 second.

This patch is changing the start_time and end_time to be end_time as
if setting zero will be having weird HW behavior where the gate will
not be fully closed.

Fixes: ec50a9d437 ("igc: Add support for taprio offloading")
Signed-off-by: Tan Tee Min <tee.min.tan@linux.intel.com>
Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tan Tee Min 2022-12-09 12:15:22 +08:00 committed by Greg Kroah-Hartman
parent af59985138
commit ac95c4e35f
1 changed files with 13 additions and 1 deletions
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14
drivers/net/ethernet/intel/igc/igc_main.c
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@ -5987,6 +5987,7 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
bool queue_configured[IGC_MAX_TX_QUEUES] = { };
u32 start_time = 0, end_time = 0;
size_t n;
int i;
adapter->qbv_enable = qopt->enable;
@ -6007,7 +6008,6 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
for (n = 0; n < qopt->num_entries; n++) {
struct tc_taprio_sched_entry *e = &qopt->entries[n];
int i;
end_time += e->interval;
@ -6046,6 +6046,18 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter,
start_time += e->interval;
}
/* Check whether a queue gets configured.
* If not, set the start and end time to be end time.
*/
for (i = 0; i < adapter->num_tx_queues; i++) {
if (!queue_configured[i]) {
struct igc_ring *ring = adapter->tx_ring[i];
ring->start_time = end_time;
ring->end_time = end_time;
}
}
return 0;
}