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net: dsa: felix: ignore pending status of TAS module when it's disabled 

[ Upstream commit 70654f4c212e83898feced125d91ebb3695950d8 ]

The TAS module could not be configured when it's running in pending
status. We need disable the module and configure it again. However, the
pending status is not cleared after the module disabled. TC taprio set
will always return busy even it's disabled.

For example, a user uses tc-taprio to configure Qbv and a future
basetime. The TAS module will run in a pending status. There is no way
to reconfigure Qbv, it always returns busy.

Actually the TAS module can be reconfigured when it's disabled. So it
doesn't need to check the pending status if the TAS module is disabled.

After the patch, user can delete the tc taprio configuration to disable
Qbv and reconfigure it again.

Fixes: de143c0e27 ("net: dsa: felix: Configure Time-Aware Scheduler via taprio offload")
Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Link: https://patch.msgid.link/20240906093550.29985-1-xiaoliang.yang_1@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaoliang Yang 2024-09-06 17:35:50 +08:00 committed by Greg Kroah-Hartman
parent 83e6fb5904
commit fc8c0cec1b
1 changed files with 7 additions and 4 deletions
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11
drivers/net/dsa/ocelot/felix_vsc9959.c
View File

@ -1474,10 +1474,13 @@ static int vsc9959_qos_port_tas_set(struct ocelot *ocelot, int port,
/* Hardware errata - Admin config could not be overwritten if
* config is pending, need reset the TAS module
*/
val = ocelot_read(ocelot, QSYS_PARAM_STATUS_REG_8);
if (val & QSYS_PARAM_STATUS_REG_8_CONFIG_PENDING) {
ret = -EBUSY;
goto err_reset_tc;
val = ocelot_read_rix(ocelot, QSYS_TAG_CONFIG, port);
if (val & QSYS_TAG_CONFIG_ENABLE) {
val = ocelot_read(ocelot, QSYS_PARAM_STATUS_REG_8);
if (val & QSYS_PARAM_STATUS_REG_8_CONFIG_PENDING) {
ret = -EBUSY;
goto err_reset_tc;
}
}
ocelot_rmw_rix(ocelot,