Subject: [PATCH net-next 4/6] net: dsa: felix: add port policers

From: Vladimir Oltean <[email-masked]>
Date: Sun, 29 Mar 2020 02:52:00 +0200

From: Vladimir Oltean <[email-masked]>

This patch is a trivial passthrough towards the ocelot library, which
support port policers since commit 2c1d029a017f ("net: mscc: ocelot:
Implement port policers via tc command").

Some data structure conversion between the DSA core and the Ocelot
library is necessary, for policer parameters.

Signed-off-by: Vladimir Oltean <[email-masked]>
---
 drivers/net/dsa/ocelot/felix.c            | 24 +++++++++++++++++++++++
 drivers/net/ethernet/mscc/ocelot_police.c |  3 +++
 drivers/net/ethernet/mscc/ocelot_police.h | 10 ----------
 drivers/net/ethernet/mscc/ocelot_tc.c     |  2 +-
 include/soc/mscc/ocelot.h                 |  8 ++++++++
 5 files changed, 36 insertions(+), 11 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index eef9fa812a3c..7f7dd6736051 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -14,6 +14,7 @@
 #include <linux/of_net.h>
 #include <linux/pci.h>
 #include <linux/of.h>
+#include <net/pkt_sched.h>
 #include <net/dsa.h>
 #include "felix.h"
 
@@ -651,6 +652,27 @@ static int felix_cls_flower_stats(struct dsa_switch *ds, int port,
 	return ocelot_cls_flower_stats(ocelot, port, cls, ingress);
 }
 
+static int felix_port_policer_add(struct dsa_switch *ds, int port,
+				  struct dsa_mall_policer_tc_entry *policer)
+{
+	struct ocelot *ocelot = ds->priv;
+	struct ocelot_policer pol = {
+		.rate = div_u64(policer->rate_bytes_per_sec, 1000) * 8,
+		.burst = div_u64(policer->rate_bytes_per_sec *
+				 PSCHED_NS2TICKS(policer->burst),
+				 PSCHED_TICKS_PER_SEC),
+	};
+
+	return ocelot_port_policer_add(ocelot, port, &pol);
+}
+
+static void felix_port_policer_del(struct dsa_switch *ds, int port)
+{
+	struct ocelot *ocelot = ds->priv;
+
+	ocelot_port_policer_del(ocelot, port);
+}
+
 static const struct dsa_switch_ops felix_switch_ops = {
 	.get_tag_protocol	= felix_get_tag_protocol,
 	.setup			= felix_setup,
@@ -684,6 +706,8 @@ static const struct dsa_switch_ops felix_switch_ops = {
 	.port_txtstamp		= felix_txtstamp,
 	.port_change_mtu	= felix_change_mtu,
 	.port_max_mtu		= felix_get_max_mtu,
+	.port_policer_add	= felix_port_policer_add,
+	.port_policer_del	= felix_port_policer_del,
 	.cls_flower_add		= felix_cls_flower_add,
 	.cls_flower_del		= felix_cls_flower_del,
 	.cls_flower_stats	= felix_cls_flower_stats,
diff --git a/drivers/net/ethernet/mscc/ocelot_police.c b/drivers/net/ethernet/mscc/ocelot_police.c
index 8d25b2706ff0..2e1d8e187332 100644
--- a/drivers/net/ethernet/mscc/ocelot_police.c
+++ b/drivers/net/ethernet/mscc/ocelot_police.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2019 Microsemi Corporation
  */
 
+#include <soc/mscc/ocelot.h>
 #include "ocelot_police.h"
 
 enum mscc_qos_rate_mode {
@@ -203,6 +204,7 @@ int ocelot_port_policer_add(struct ocelot *ocelot, int port,
 
 	return 0;
 }
+EXPORT_SYMBOL(ocelot_port_policer_add);
 
 int ocelot_port_policer_del(struct ocelot *ocelot, int port)
 {
@@ -225,6 +227,7 @@ int ocelot_port_policer_del(struct ocelot *ocelot, int port)
 
 	return 0;
 }
+EXPORT_SYMBOL(ocelot_port_policer_del);
 
 int ocelot_ace_policer_add(struct ocelot *ocelot, u32 pol_ix,
 			   struct ocelot_policer *pol)
diff --git a/drivers/net/ethernet/mscc/ocelot_police.h b/drivers/net/ethernet/mscc/ocelot_police.h
index 22025cce0a6a..792abd28010a 100644
--- a/drivers/net/ethernet/mscc/ocelot_police.h
+++ b/drivers/net/ethernet/mscc/ocelot_police.h
@@ -9,16 +9,6 @@
 
 #include "ocelot.h"
 
-struct ocelot_policer {
-	u32 rate; /* kilobit per second */
-	u32 burst; /* bytes */
-};
-
-int ocelot_port_policer_add(struct ocelot *ocelot, int port,
-			    struct ocelot_policer *pol);
-
-int ocelot_port_policer_del(struct ocelot *ocelot, int port);
-
 int ocelot_ace_policer_add(struct ocelot *ocelot, u32 pol_ix,
 			   struct ocelot_policer *pol);
 
diff --git a/drivers/net/ethernet/mscc/ocelot_tc.c b/drivers/net/ethernet/mscc/ocelot_tc.c
index 3ff5ef41eccf..d326e231f0ad 100644
--- a/drivers/net/ethernet/mscc/ocelot_tc.c
+++ b/drivers/net/ethernet/mscc/ocelot_tc.c
@@ -4,8 +4,8 @@
  * Copyright (c) 2019 Microsemi Corporation
  */
 
+#include <soc/mscc/ocelot.h>
 #include "ocelot_tc.h"
-#include "ocelot_police.h"
 #include "ocelot_ace.h"
 #include <net/pkt_cls.h>
 
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 3db66638a3b2..ca49f7a114de 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -555,6 +555,11 @@ struct ocelot {
 	struct ptp_pin_desc		ptp_pins[OCELOT_PTP_PINS_NUM];
 };
 
+struct ocelot_policer {
+	u32 rate; /* kilobit per second */
+	u32 burst; /* bytes */
+};
+
 #define ocelot_read_ix(ocelot, reg, gi, ri) __ocelot_read_ix(ocelot, reg, reg##_GSZ * (gi) + reg##_RSZ * (ri))
 #define ocelot_read_gix(ocelot, reg, gi) __ocelot_read_ix(ocelot, reg, reg##_GSZ * (gi))
 #define ocelot_read_rix(ocelot, reg, ri) __ocelot_read_ix(ocelot, reg, reg##_RSZ * (ri))
@@ -624,6 +629,9 @@ int ocelot_port_add_txtstamp_skb(struct ocelot_port *ocelot_port,
 void ocelot_get_txtstamp(struct ocelot *ocelot);
 void ocelot_port_set_maxlen(struct ocelot *ocelot, int port, size_t sdu);
 int ocelot_get_max_mtu(struct ocelot *ocelot, int port);
+int ocelot_port_policer_add(struct ocelot *ocelot, int port,
+			    struct ocelot_policer *pol);
+int ocelot_port_policer_del(struct ocelot *ocelot, int port);
 int ocelot_cls_flower_replace(struct ocelot *ocelot, int port,
 			      struct flow_cls_offload *f, bool ingress);
 int ocelot_cls_flower_destroy(struct ocelot *ocelot, int port,
-- 
2.17.1