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[net-next,v2,7/8] igc: Add support for Frame Preemption offload

Message ID 20210119004028.2809425-8-vinicius.gomes@intel.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series ethtool: Add support for frame preemption | expand

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netdev/tree_selection success Clearly marked for net-next
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netdev/cc_maintainers warning 2 maintainers not CCed: davem@davemloft.net jesse.brandeburg@intel.com
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 50 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Vinicius Costa Gomes Jan. 19, 2021, 12:40 a.m. UTC
After the set of queues that are marked as preemptible are exposed to
the driver we can configure the hardware to enable the frame
preemption functionality.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 32 +++++++++++++++++++++++
 1 file changed, 32 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index f1b31fa04734..6a09f37ba7ed 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -4818,6 +4818,23 @@  static int igc_save_qbv_schedule(struct igc_adapter *adapter,
 	return 0;
 }
 
+static int igc_save_frame_preemption(struct igc_adapter *adapter,
+				     struct tc_preempt_qopt_offload *qopt)
+{
+	u32 preempt;
+	int i;
+
+	preempt = qopt->preemptible_queues;
+
+	for (i = 0; i < adapter->num_tx_queues; i++) {
+		struct igc_ring *ring = adapter->tx_ring[i];
+
+		ring->preemptible = preempt & BIT(i);
+	}
+
+	return 0;
+}
+
 static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter,
 					 struct tc_taprio_qopt_offload *qopt)
 {
@@ -4834,6 +4851,18 @@  static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter,
 	return igc_tsn_offload_apply(adapter);
 }
 
+static int igc_tsn_enable_frame_preemption(struct igc_adapter *adapter,
+					   struct tc_preempt_qopt_offload *qopt)
+{
+	int err;
+
+	err = igc_save_frame_preemption(adapter, qopt);
+	if (err)
+		return err;
+
+	return igc_tsn_offload_apply(adapter);
+}
+
 static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type,
 			void *type_data)
 {
@@ -4846,6 +4875,9 @@  static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type,
 	case TC_SETUP_QDISC_ETF:
 		return igc_tsn_enable_launchtime(adapter, type_data);
 
+	case TC_SETUP_PREEMPT:
+		return igc_tsn_enable_frame_preemption(adapter, type_data);
+
 	default:
 		return -EOPNOTSUPP;
 	}