netdev - [PATCH net-next 3/3] igc: Remove reset adapter task for i226 during disable tsn config

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Date:   Tue,  3 Jan 2023 15:05:03 -0800
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com
Cc:     Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>,
        netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
        sasha.neftin@...el.com, Naama Meir <naamax.meir@...ux.intel.com>
Subject: [PATCH net-next 3/3] igc: Remove reset adapter task for i226 during disable tsn config

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

I225 have limitation when programming the BaseTime register which required
a power cycle of the controller. This limitation already lifted in I226.
This patch removes the restriction so that when user configure/remove any
TSN mode, it would not go into power cycle reset adapter.

How to test:

Schedule any gate control list configuration or delete it.

Example:

1)

BASE_TIME=$(date +%s%N)
tc qdisc replace dev $interface_name parent root handle 100 taprio \
    num_tc 4 \
    map 3 1 0 2 3 3 3 3 3 3 3 3 3 3 3 3 \
    queues 1@0 1@1 1@2 1@3 \
    base-time $BASE_TIME \
    sched-entry S 0F 1000000 \
    flags 0x2

2) tc qdisc del dev $intername_name root

Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@...el.com>
Tested-by: Naama Meir <naamax.meir@...ux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c |  6 +++---
 drivers/net/ethernet/intel/igc/igc_tsn.c  | 11 +++--------
 drivers/net/ethernet/intel/igc/igc_tsn.h  |  2 +-
 3 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 212560f22254..e86b15efaeb8 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -6020,7 +6020,7 @@ static int igc_tsn_enable_launchtime(struct igc_adapter *adapter,
 	if (err)
 		return err;
 
-	return igc_tsn_offload_apply(adapter, qopt->enable);
+	return igc_tsn_offload_apply(adapter);
 }
 
 static int igc_tsn_clear_schedule(struct igc_adapter *adapter)
@@ -6134,7 +6134,7 @@ static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter,
 	if (err)
 		return err;
 
-	return igc_tsn_offload_apply(adapter, qopt->enable);
+	return igc_tsn_offload_apply(adapter);
 }
 
 static int igc_save_cbs_params(struct igc_adapter *adapter, int queue,
@@ -6202,7 +6202,7 @@ static int igc_tsn_enable_cbs(struct igc_adapter *adapter,
 	if (err)
 		return err;
 
-	return igc_tsn_offload_apply(adapter, qopt->enable);
+	return igc_tsn_offload_apply(adapter);
 }
 
 static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type,
diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.c b/drivers/net/ethernet/intel/igc/igc_tsn.c
index d26fc0f47640..a386c8d61dbf 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.c
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.c
@@ -289,21 +289,16 @@ int igc_tsn_reset(struct igc_adapter *adapter)
 	return err;
 }
 
-int igc_tsn_offload_apply(struct igc_adapter *adapter, bool enable)
+int igc_tsn_offload_apply(struct igc_adapter *adapter)
 {
 	struct igc_hw *hw = &adapter->hw;
-	int err;
 
-	if (netif_running(adapter->netdev) &&
-	    (igc_is_device_id_i225(hw) || !enable)) {
+	if (netif_running(adapter->netdev) && igc_is_device_id_i225(hw)) {
 		schedule_work(&adapter->reset_task);
 		return 0;
 	}
 
-	err = igc_tsn_enable_offload(adapter);
-	if (err < 0)
-		return err;
+	igc_tsn_reset(adapter);
 
-	adapter->flags = igc_tsn_new_flags(adapter);
 	return 0;
 }
diff --git a/drivers/net/ethernet/intel/igc/igc_tsn.h b/drivers/net/ethernet/intel/igc/igc_tsn.h
index 631222bb6eb5..b53e6af560b7 100644
--- a/drivers/net/ethernet/intel/igc/igc_tsn.h
+++ b/drivers/net/ethernet/intel/igc/igc_tsn.h
@@ -4,7 +4,7 @@
 #ifndef _IGC_TSN_H_
 #define _IGC_TSN_H_
 
-int igc_tsn_offload_apply(struct igc_adapter *adapter, bool enable);
+int igc_tsn_offload_apply(struct igc_adapter *adapter);
 int igc_tsn_reset(struct igc_adapter *adapter);
 void igc_tsn_adjust_txtime_offset(struct igc_adapter *adapter);
 
-- 
2.38.1