linux-kernel - [PATCH net-next 1/2] net: dsa: mv88e6xxx: allow driver to hook TC callback

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Date:   Fri,  9 Jun 2023 16:18:11 +0200
From:   alexis.lothore@...tlin.com
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        paul.arola@...us.com, scott.roberts@...us.com
Subject: [PATCH net-next 1/2] net: dsa: mv88e6xxx: allow driver to hook TC callback

From: Alexis Lothoré <alexis.lothore@...tlin.com>

Marvell switches have some traffic control offloading capabilities, like
for example per-port rate limiting. Allow driver to benefit from this
offloading by hooking TC setup callback in DSA

Signed-off-by: Alexis Lothoré <alexis.lothore@...tlin.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 17 +++++++++++++++++
 drivers/net/dsa/mv88e6xxx/chip.h |  3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 8b51756bd805..0f1ae2aeaf00 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -7091,6 +7091,22 @@ static int mv88e6xxx_crosschip_lag_leave(struct dsa_switch *ds, int sw_index,
 	return err_sync ? : err_pvt;
 }
 
+static int mv88e6xxx_port_setup_tc(struct dsa_switch *ds, int port,
+				   enum tc_setup_type type, void *type_data)
+{
+	struct mv88e6xxx_chip *chip = ds->priv;
+	int err;
+
+	if (!chip->info->ops->port_setup_tc)
+		return -EOPNOTSUPP;
+
+	mv88e6xxx_reg_lock(chip);
+	err = chip->info->ops->port_setup_tc(ds, port, type, type_data);
+	mv88e6xxx_reg_unlock(chip);
+
+	return err;
+}
+
 static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
 	.get_tag_protocol	= mv88e6xxx_get_tag_protocol,
 	.change_tag_protocol	= mv88e6xxx_change_tag_protocol,
@@ -7158,6 +7174,7 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
 	.crosschip_lag_change	= mv88e6xxx_crosschip_lag_change,
 	.crosschip_lag_join	= mv88e6xxx_crosschip_lag_join,
 	.crosschip_lag_leave	= mv88e6xxx_crosschip_lag_leave,
+	.port_setup_tc		= mv88e6xxx_port_setup_tc,
 };
 
 static int mv88e6xxx_register_switch(struct mv88e6xxx_chip *chip)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index 0ad34b2d8913..b259671b2cd7 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -560,7 +560,8 @@ struct mv88e6xxx_ops {
 	 */
 	int (*port_set_upstream_port)(struct mv88e6xxx_chip *chip, int port,
 				      int upstream_port);
-
+	int (*port_setup_tc)(struct dsa_switch *ds, int port,
+			     enum tc_setup_type type, void *type_data);
 	/* Snapshot the statistics for a port. The statistics can then
 	 * be read back a leisure but still with a consistent view.
 	 */
-- 
2.41.0