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Date: Sun, 14 May 2023 22:10:26 +0200
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <UNGLinuxDriver@...rochip.com>, Horatiu Vultur
<horatiu.vultur@...rochip.com>
Subject: [PATCH net-next 4/7] net: lan966x: Add support for offloading dscp table
Add support for offloading dscp app entries. The dscp values are global
for all lan966x ports.
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
.../ethernet/microchip/lan966x/lan966x_dcb.c | 61 +++++++++++++++++--
.../ethernet/microchip/lan966x/lan966x_main.h | 8 +++
.../ethernet/microchip/lan966x/lan966x_port.c | 26 ++++++++
3 files changed, 90 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_dcb.c b/drivers/net/ethernet/microchip/lan966x/lan966x_dcb.c
index c149f905fe9e3..2b518181b7f08 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_dcb.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_dcb.c
@@ -57,19 +57,62 @@ static void lan966x_dcb_app_update(struct net_device *dev)
qos.pcp.map[i] = dcb_getapp(dev, &app_itr);
}
+ /* Get dscp ingress mapping */
+ for (int i = 0; i < ARRAY_SIZE(qos.dscp.map); i++) {
+ app_itr.selector = IEEE_8021QAZ_APP_SEL_DSCP;
+ app_itr.protocol = i;
+ qos.dscp.map[i] = dcb_getapp(dev, &app_itr);
+ }
+
/* Enable use of pcp for queue classification */
if (lan966x_dcb_apptrust_contains(port->chip_port, DCB_APP_SEL_PCP))
qos.pcp.enable = true;
+ /* Enable use of dscp for queue classification */
+ if (lan966x_dcb_apptrust_contains(port->chip_port, IEEE_8021QAZ_APP_SEL_DSCP))
+ qos.dscp.enable = true;
+
lan966x_port_qos_set(port, &qos);
}
+/* DSCP mapping is global for all ports, so set and delete app entries are
+ * replicated for each port.
+ */
+static int lan966x_dcb_ieee_dscp_setdel(struct net_device *dev,
+ struct dcb_app *app,
+ int (*setdel)(struct net_device *,
+ struct dcb_app *))
+{
+ struct lan966x_port *port = netdev_priv(dev);
+ struct lan966x *lan966x = port->lan966x;
+ int err;
+
+ for (int i = 0; i < NUM_PHYS_PORTS; i++) {
+ port = lan966x->ports[i];
+ if (!port)
+ continue;
+
+ err = setdel(port->dev, app);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
static int lan966x_dcb_app_validate(struct net_device *dev,
const struct dcb_app *app)
{
int err = 0;
switch (app->selector) {
+ /* Dscp checks */
+ case IEEE_8021QAZ_APP_SEL_DSCP:
+ if (app->protocol >= LAN966X_PORT_QOS_DSCP_COUNT)
+ err = -EINVAL;
+ else if (app->priority >= NUM_PRIO_QUEUES)
+ err = -ERANGE;
+ break;
/* Pcp checks */
case DCB_APP_SEL_PCP:
if (app->protocol >= LAN966X_PORT_QOS_PCP_DEI_COUNT)
@@ -93,8 +136,12 @@ static int lan966x_dcb_ieee_delapp(struct net_device *dev, struct dcb_app *app)
{
int err;
- err = dcb_ieee_delapp(dev, app);
- if (err < 0)
+ if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
+ err = lan966x_dcb_ieee_dscp_setdel(dev, app, dcb_ieee_delapp);
+ else
+ err = dcb_ieee_delapp(dev, app);
+
+ if (err)
return err;
lan966x_dcb_app_update(dev);
@@ -117,12 +164,16 @@ static int lan966x_dcb_ieee_setapp(struct net_device *dev, struct dcb_app *app)
if (prio) {
app_itr = *app;
app_itr .priority = prio;
- dcb_ieee_delapp(dev, &app_itr);
+ lan966x_dcb_ieee_delapp(dev, &app_itr);
}
- err = dcb_ieee_setapp(dev, app);
+ if (app->selector == IEEE_8021QAZ_APP_SEL_DSCP)
+ err = lan966x_dcb_ieee_dscp_setdel(dev, app, dcb_ieee_setapp);
+ else
+ err = dcb_ieee_setapp(dev, app);
+
if (err)
- goto out;
+ return err;
lan966x_dcb_app_update(dev);
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index b9ca47ab6e8be..8213440e08672 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -109,6 +109,8 @@
#define LAN966X_PORT_QOS_PCP_DEI_COUNT \
(LAN966X_PORT_QOS_PCP_COUNT + LAN966X_PORT_QOS_DEI_COUNT)
+#define LAN966X_PORT_QOS_DSCP_COUNT 64
+
/* MAC table entry types.
* ENTRYTYPE_NORMAL is subject to aging.
* ENTRYTYPE_LOCKED is not subject to aging.
@@ -402,8 +404,14 @@ struct lan966x_port_qos_pcp {
bool enable;
};
+struct lan966x_port_qos_dscp {
+ u8 map[LAN966X_PORT_QOS_DSCP_COUNT];
+ bool enable;
+};
+
struct lan966x_port_qos {
struct lan966x_port_qos_pcp pcp;
+ struct lan966x_port_qos_dscp dscp;
};
struct lan966x_port {
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
index 0cee8127c48eb..11c552e87ee44 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
@@ -418,10 +418,36 @@ static void lan966x_port_qos_pcp_set(struct lan966x_port *port,
}
}
+static void lan966x_port_qos_dscp_set(struct lan966x_port *port,
+ struct lan966x_port_qos_dscp *qos)
+{
+ struct lan966x *lan966x = port->lan966x;
+
+ /* Enable/disable dscp for qos classification. */
+ lan_rmw(ANA_QOS_CFG_QOS_DSCP_ENA_SET(qos->enable),
+ ANA_QOS_CFG_QOS_DSCP_ENA,
+ lan966x, ANA_QOS_CFG(port->chip_port));
+
+ /* Map each dscp value to priority and dp */
+ for (int i = 0; i < ARRAY_SIZE(qos->map); i++)
+ lan_rmw(ANA_DSCP_CFG_DP_DSCP_VAL_SET(0) |
+ ANA_DSCP_CFG_QOS_DSCP_VAL_SET(*(qos->map + i)),
+ ANA_DSCP_CFG_DP_DSCP_VAL |
+ ANA_DSCP_CFG_QOS_DSCP_VAL,
+ lan966x, ANA_DSCP_CFG(i));
+
+ /* Set per-dscp trust */
+ for (int i = 0; i < ARRAY_SIZE(qos->map); i++)
+ lan_rmw(ANA_DSCP_CFG_DSCP_TRUST_ENA_SET(qos->enable),
+ ANA_DSCP_CFG_DSCP_TRUST_ENA,
+ lan966x, ANA_DSCP_CFG(i));
+}
+
void lan966x_port_qos_set(struct lan966x_port *port,
struct lan966x_port_qos *qos)
{
lan966x_port_qos_pcp_set(port, &qos->pcp);
+ lan966x_port_qos_dscp_set(port, &qos->dscp);
}
void lan966x_port_init(struct lan966x_port *port)
--
2.38.0
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