linux-kernel - [PATCH RFC net-next v2 18/18] net: pse-pd: pd692x0: Add support for PSE PI priority feature

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Message-Id: <20241030-feature_poe_port_prio-v2-18-9559622ee47a@bootlin.com>
Date: Wed, 30 Oct 2024 17:53:20 +0100
From: Kory Maincent <kory.maincent@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>, Oleksij Rempel <o.rempel@...gutronix.de>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Jonathan Corbet <corbet@....net>, Donald Hunter <donald.hunter@...il.com>, 
 Rob Herring <robh@...nel.org>, Andrew Lunn <andrew+netdev@...n.ch>, 
 Simon Horman <horms@...nel.org>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 linux-doc@...r.kernel.org, Kyle Swenson <kyle.swenson@....tech>, 
 Dent Project <dentproject@...uxfoundation.org>, kernel@...gutronix.de, 
 Maxime Chevallier <maxime.chevallier@...tlin.com>, 
 Kory Maincent <kory.maincent@...tlin.com>
Subject: [PATCH RFC net-next v2 18/18] net: pse-pd: pd692x0: Add support
 for PSE PI priority feature

From: Kory Maincent (Dent Project) <kory.maincent@...tlin.com>

This patch extends the PSE callbacks by adding support for the newly
introduced pi_set_prio() callback, enabling the configuration of PSE PI
priorities. The current port priority is now also included in the status
information returned to users.

Reviewed-by: Kyle Swenson <kyle.swenson@....tech>
Signed-off-by: Kory Maincent <kory.maincent@...tlin.com>
---
 drivers/net/pse-pd/pd692x0.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/net/pse-pd/pd692x0.c b/drivers/net/pse-pd/pd692x0.c
index 0af7db80b2f8..018b6559049f 100644
--- a/drivers/net/pse-pd/pd692x0.c
+++ b/drivers/net/pse-pd/pd692x0.c
@@ -685,6 +685,8 @@ static int pd692x0_ethtool_get_status(struct pse_controller_dev *pcdev,
 	if (ret < 0)
 		return ret;
 	status->c33_avail_pw_limit = ret;
+	/* PSE core priority start at 0 */
+	status->c33_prio = buf.data[2] - 1;

 	memset(&buf, 0, sizeof(buf));
 	msg = pd692x0_msg_template_list[PD692X0_MSG_GET_PORT_CLASS];
@@ -1061,6 +1063,25 @@ static int pd692x0_pi_set_current_limit(struct pse_controller_dev *pcdev,
 	return pd692x0_sendrecv_msg(priv, &msg, &buf);
 }

+static int pd692x0_pi_set_prio(struct pse_controller_dev *pcdev, int id,
+			       unsigned int prio)
+{
+	struct pd692x0_priv *priv = to_pd692x0_priv(pcdev);
+	struct pd692x0_msg msg, buf = {0};
+	int ret;
+
+	ret = pd692x0_fw_unavailable(priv);
+	if (ret)
+		return ret;
+
+	msg = pd692x0_msg_template_list[PD692X0_MSG_SET_PORT_PARAM];
+	msg.sub[2] = id;
+	/* Controller priority from 1 to 3 */
+	msg.data[4] = prio + 1;
+
+	return pd692x0_sendrecv_msg(priv, &msg, &buf);
+}
+
 static const struct pse_controller_ops pd692x0_ops = {
 	.setup_pi_matrix = pd692x0_setup_pi_matrix,
 	.ethtool_get_status = pd692x0_ethtool_get_status,
@@ -1070,6 +1091,7 @@ static const struct pse_controller_ops pd692x0_ops = {
 	.pi_get_voltage = pd692x0_pi_get_voltage,
 	.pi_get_current_limit = pd692x0_pi_get_current_limit,
 	.pi_set_current_limit = pd692x0_pi_set_current_limit,
+	.pi_set_prio = pd692x0_pi_set_prio,
 };

 #define PD692X0_FW_LINE_MAX_SZ 0xff
@@ -1486,6 +1508,8 @@ static int pd692x0_i2c_probe(struct i2c_client *client)
 	priv->pcdev.ops = &pd692x0_ops;
 	priv->pcdev.dev = dev;
 	priv->pcdev.types = ETHTOOL_PSE_C33;
+	priv->pcdev.port_prio_supp_modes = BIT(ETHTOOL_PSE_PORT_PRIO_DYNAMIC);
+	priv->pcdev.pis_prio_max = 2;
 	ret = devm_pse_controller_register(dev, &priv->pcdev);
 	if (ret)
 		return dev_err_probe(dev, ret,

-- 
2.34.1