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Date: Fri, 25 Nov 2022 10:50:08 +0100
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
CC: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <lars.povlsen@...rochip.com>,
<Steen.Hegelund@...rochip.com>, <daniel.machon@...rochip.com>,
<UNGLinuxDriver@...rochip.com>,
Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next 7/9] net: lan966x: add tc matchall goto action
Extend matchall with action goto. This is needed to enable the lookup in
the VCAP. It is needed to connect chain 0 to a chain that is recognized
by the HW.
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
.../net/ethernet/microchip/lan966x/Makefile | 2 +-
.../ethernet/microchip/lan966x/lan966x_goto.c | 54 +++++++++++++++++++
.../ethernet/microchip/lan966x/lan966x_main.h | 9 ++++
.../microchip/lan966x/lan966x_tc_matchall.c | 6 +++
4 files changed, 70 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_goto.c
diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile
index 23781149f7a9b..56afd694f3c78 100644
--- a/drivers/net/ethernet/microchip/lan966x/Makefile
+++ b/drivers/net/ethernet/microchip/lan966x/Makefile
@@ -13,7 +13,7 @@ lan966x-switch-objs := lan966x_main.o lan966x_phylink.o lan966x_port.o \
lan966x_tbf.o lan966x_cbs.o lan966x_ets.o \
lan966x_tc_matchall.o lan966x_police.o lan966x_mirror.o \
lan966x_xdp.o lan966x_vcap_impl.o lan966x_vcap_ag_api.o \
- lan966x_tc_flower.o
+ lan966x_tc_flower.o lan966x_goto.o
# Provide include files
ccflags-y += -I$(srctree)/drivers/net/ethernet/microchip/vcap
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_goto.c b/drivers/net/ethernet/microchip/lan966x/lan966x_goto.c
new file mode 100644
index 0000000000000..bf0cfe24a8fc0
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_goto.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lan966x_main.h"
+#include "vcap_api_client.h"
+
+int lan966x_goto_port_add(struct lan966x_port *port,
+ struct flow_action_entry *act,
+ unsigned long goto_id,
+ struct netlink_ext_ack *extack)
+{
+ struct lan966x *lan966x = port->lan966x;
+ int err;
+
+ err = vcap_enable_lookups(lan966x->vcap_ctrl, port->dev,
+ act->chain_index, goto_id,
+ true);
+ if (err == -EFAULT) {
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported goto chain");
+ return -EOPNOTSUPP;
+ }
+
+ if (err == -EADDRINUSE) {
+ NL_SET_ERR_MSG_MOD(extack, "VCAP already enabled");
+ return -EOPNOTSUPP;
+ }
+
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack, "Could not enable VCAP lookups");
+ return err;
+ }
+
+ port->tc.goto_id = goto_id;
+
+ return 0;
+}
+
+int lan966x_goto_port_del(struct lan966x_port *port,
+ unsigned long goto_id,
+ struct netlink_ext_ack *extack)
+{
+ struct lan966x *lan966x = port->lan966x;
+ int err;
+
+ err = vcap_enable_lookups(lan966x->vcap_ctrl, port->dev, 0,
+ goto_id, false);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack, "Could not disable VCAP lookups");
+ return err;
+ }
+
+ port->tc.goto_id = 0;
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index 0820b96b75ab1..b9993ff2aa22f 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -310,6 +310,7 @@ struct lan966x_port_tc {
unsigned long police_id;
unsigned long ingress_mirror_id;
unsigned long egress_mirror_id;
+ unsigned long goto_id;
struct flow_stats police_stat;
struct flow_stats mirror_stat;
};
@@ -569,6 +570,14 @@ void lan966x_vcap_deinit(struct lan966x *lan966x);
int lan966x_tc_flower(struct lan966x_port *port,
struct flow_cls_offload *f);
+int lan966x_goto_port_add(struct lan966x_port *port,
+ struct flow_action_entry *act,
+ unsigned long goto_id,
+ struct netlink_ext_ack *extack);
+int lan966x_goto_port_del(struct lan966x_port *port,
+ unsigned long goto_id,
+ struct netlink_ext_ack *extack);
+
static inline void __iomem *lan_addr(void __iomem *base[],
int id, int tinst, int tcnt,
int gbase, int ginst,
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_tc_matchall.c b/drivers/net/ethernet/microchip/lan966x/lan966x_tc_matchall.c
index 7368433b9277a..a539abaad9b67 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_tc_matchall.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_tc_matchall.c
@@ -23,6 +23,9 @@ static int lan966x_tc_matchall_add(struct lan966x_port *port,
case FLOW_ACTION_MIRRED:
return lan966x_mirror_port_add(port, act, f->cookie,
ingress, f->common.extack);
+ case FLOW_ACTION_GOTO:
+ return lan966x_goto_port_add(port, act, f->cookie,
+ f->common.extack);
default:
NL_SET_ERR_MSG_MOD(f->common.extack,
"Unsupported action");
@@ -43,6 +46,9 @@ static int lan966x_tc_matchall_del(struct lan966x_port *port,
f->cookie == port->tc.egress_mirror_id) {
return lan966x_mirror_port_del(port, ingress,
f->common.extack);
+ } else if (f->cookie == port->tc.goto_id) {
+ return lan966x_goto_port_del(port, f->cookie,
+ f->common.extack);
} else {
NL_SET_ERR_MSG_MOD(f->common.extack,
"Unsupported action");
--
2.38.0
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