[PATCH 3/4] cpsw_switchdev: add switchdev support files

[Ilias Apalodimas <ilias.apalodimas@linaro.org>]

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---
 drivers/net/ethernet/ti/Kconfig          |   9 +
 drivers/net/ethernet/ti/Makefile         |   1 +
 drivers/net/ethernet/ti/cpsw_switchdev.c | 299 +++++++++++++++++++++++++++++++
 drivers/net/ethernet/ti/cpsw_switchdev.h |   4 +
 4 files changed, 313 insertions(+)
 create mode 100644 drivers/net/ethernet/ti/cpsw_switchdev.c
 create mode 100644 drivers/net/ethernet/ti/cpsw_switchdev.h

diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
index 48a541e..b22ae7d 100644
--- a/drivers/net/ethernet/ti/Kconfig
+++ b/drivers/net/ethernet/ti/Kconfig
@@ -73,6 +73,15 @@ config TI_CPSW
 	  To compile this driver as a module, choose M here: the module
 	  will be called cpsw.
 
+config TI_CPSW_SWITCHDEV
+	bool "TI CPSW switchdev support"
+	depends on TI_CPSW
+	depends on NET_SWITCHDEV
+	help
+	  Enable switchdev support on TI's CPSW Ethernet Switch.
+
+	  This will allow you to configure the switch using standard tools.
+
 config TI_CPTS
 	bool "TI Common Platform Time Sync (CPTS) Support"
 	depends on TI_CPSW || TI_KEYSTONE_NETCP
diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile
index 0be551d..3926c6a 100644
--- a/drivers/net/ethernet/ti/Makefile
+++ b/drivers/net/ethernet/ti/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_TI_CPSW_PHY_SEL) += cpsw-phy-sel.o
 obj-$(CONFIG_TI_CPSW_ALE) += cpsw_ale.o
 obj-$(CONFIG_TI_CPTS_MOD) += cpts.o
 obj-$(CONFIG_TI_CPSW) += ti_cpsw.o
+ti_cpsw-objs:= cpsw_switchdev.o
 ti_cpsw-y := cpsw.o
 
 obj-$(CONFIG_TI_KEYSTONE_NETCP) += keystone_netcp.o
diff --git a/drivers/net/ethernet/ti/cpsw_switchdev.c b/drivers/net/ethernet/ti/cpsw_switchdev.c
new file mode 100644
index 0000000..bf8c1bf
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw_switchdev.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Texas Instruments switchdev Driver
+ *
+ * Copyright (C) 2018 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/if_bridge.h>
+#include <net/switchdev.h>
+#include "cpsw.h"
+#include "cpsw_priv.h"
+#include "cpsw_ale.h"
+
+static u32 cpsw_switchdev_get_ver(struct net_device *ndev)
+{
+	struct cpsw_priv *priv = netdev_priv(ndev);
+	struct cpsw_common *cpsw = priv->cpsw;
+
+	return cpsw->version;
+}
+
+static int cpsw_port_attr_set(struct net_device *dev,
+			      const struct switchdev_attr *attr,
+			      struct switchdev_trans *trans)
+{
+	return -EOPNOTSUPP;
+}
+
+static int cpsw_port_attr_get(struct net_device *dev,
+			      struct switchdev_attr *attr)
+{
+	u32 cpsw_ver;
+	int err = 0;
+
+	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
+		cpsw_ver = cpsw_switchdev_get_ver(dev);
+		attr->u.ppid.id_len = sizeof(cpsw_ver);
+		memcpy(&attr->u.ppid.id, &cpsw_ver, attr->u.ppid.id_len);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return err;
+}
+
+static u16 cpsw_get_pvid(struct cpsw_priv *priv)
+{
+	struct cpsw_common *cpsw = priv->cpsw;
+	u32 __iomem *port_vlan_reg;
+	u32 pvid;
+
+	if (priv->emac_port) {
+		int reg = CPSW2_PORT_VLAN;
+
+		if (cpsw->version == CPSW_VERSION_1)
+			reg = CPSW1_PORT_VLAN;
+		pvid = slave_read(cpsw->slaves + (priv->emac_port - 1), reg);
+	} else {
+		port_vlan_reg = &cpsw->host_port_regs->port_vlan;
+		pvid = readl(port_vlan_reg);
+	}
+
+	pvid = pvid & 0xfff;
+
+	return pvid;
+}
+
+static void cpsw_set_pvid(struct cpsw_priv *priv, u16 vid, bool cfi, u32 cos)
+{
+	struct cpsw_common *cpsw = priv->cpsw;
+	void __iomem *port_vlan_reg;
+	u32 pvid;
+
+	pvid = vid;
+	pvid |= cfi ? BIT(12) : 0;
+	pvid |= (cos & 0x7) << 13;
+
+	if (priv->emac_port) {
+		int reg = CPSW2_PORT_VLAN;
+
+		if (cpsw->version == CPSW_VERSION_1)
+			reg = CPSW1_PORT_VLAN;
+		/* no barrier */
+		slave_write(cpsw->slaves + (priv->emac_port - 1), pvid, reg);
+	} else {
+		/* CPU port */
+		port_vlan_reg = &cpsw->host_port_regs->port_vlan;
+		writel(pvid, port_vlan_reg);
+	}
+}
+
+static int cpsw_port_vlan_add(struct cpsw_priv *priv, bool untag, bool pvid,
+			      u16 vid)
+{
+	struct cpsw_common *cpsw = priv->cpsw;
+	int port_mask = BIT(priv->emac_port);
+	int unreg_mcast_mask = 0;
+	int reg_mcast_mask = 0;
+	int untag_mask = 0;
+	int ret = 0;
+
+	if (priv->ndev->flags & IFF_ALLMULTI)
+		unreg_mcast_mask = port_mask;
+
+	if (priv->ndev->flags & IFF_MULTICAST)
+		reg_mcast_mask = port_mask;
+
+	if (untag)
+		untag_mask = port_mask;
+
+	ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask,
+				       reg_mcast_mask, unreg_mcast_mask);
+	if (ret) {
+		dev_err(priv->dev, "Unable to add vlan\n");
+		return ret;
+	}
+
+	if (!pvid)
+		return ret;
+
+	cpsw_set_pvid(priv, vid, 0, 0);
+
+	dev_dbg(priv->dev, "VID: %u dev: %s port: %u\n", vid,
+		priv->ndev->name, priv->emac_port);
+
+	return ret;
+}
+
+static int cpsw_port_vlan_del(struct cpsw_priv *priv, u16 vid)
+{
+	struct cpsw_common *cpsw = priv->cpsw;
+	int port_mask = BIT(priv->emac_port);
+	int ret = 0;
+
+	ret = cpsw_ale_vlan_del_modify(cpsw->ale, vid, port_mask);
+	if (ret != 0)
+		return ret;
+
+	ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
+				 HOST_PORT_NUM, ALE_VLAN, vid);
+
+	if (vid == cpsw_get_pvid(priv))
+		cpsw_set_pvid(priv, 0, 0, 0);
+
+	if (ret != 0) {
+		dev_dbg(priv->dev, "Failed to delete unicast entry\n");
+		ret = 0;
+	}
+
+	ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
+				 0, ALE_VLAN, vid);
+	if (ret != 0) {
+		dev_dbg(priv->dev, "Failed to delete multicast entry\n");
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static int cpsw_port_vlans_add(struct cpsw_priv *priv,
+			       const struct switchdev_obj_port_vlan *vlan,
+			       struct switchdev_trans *trans)
+{
+	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
+	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
+	u16 vid;
+
+	if (switchdev_trans_ph_prepare(trans))
+		return 0;
+
+	for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
+		int err;
+
+		err = cpsw_port_vlan_add(priv, untagged, pvid, vid);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int cpsw_port_vlans_del(struct cpsw_priv *priv,
+			       const struct switchdev_obj_port_vlan *vlan)
+
+{
+	u16 vid;
+
+	for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
+		int err;
+
+		err = cpsw_port_vlan_del(priv, vid);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int cpsw_port_mdb_add(struct cpsw_priv *priv,
+			     struct switchdev_obj_port_mdb *mdb,
+			     struct switchdev_trans *trans)
+{
+	struct cpsw_common *cpsw = priv->cpsw;
+	int port_mask;
+	int err;
+
+	if (switchdev_trans_ph_prepare(trans))
+		return 0;
+
+	port_mask = BIT(priv->emac_port);
+	err = cpsw_ale_mcast_add_modify(cpsw->ale, mdb->addr, port_mask,
+					ALE_VLAN, mdb->vid, 0);
+
+	return err;
+}
+
+static int cpsw_port_mdb_del(struct cpsw_priv *priv,
+			     struct switchdev_obj_port_mdb *mdb)
+
+{
+	struct cpsw_common *cpsw = priv->cpsw;
+	int del_mask;
+	int err;
+
+	del_mask = BIT(priv->emac_port);
+	err = cpsw_ale_mcast_del_modify(cpsw->ale, mdb->addr, del_mask,
+					ALE_VLAN, mdb->vid);
+
+	return err;
+}
+
+static int cpsw_port_obj_add(struct net_device *ndev,
+			     const struct switchdev_obj *obj,
+			     struct switchdev_trans *trans)
+{
+	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
+	struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
+	struct cpsw_priv *priv = netdev_priv(ndev);
+	int err = 0;
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		err = cpsw_port_vlans_add(priv, vlan, trans);
+		break;
+	case SWITCHDEV_OBJ_ID_PORT_MDB:
+		err = cpsw_port_mdb_add(priv, mdb, trans);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+
+static int cpsw_port_obj_del(struct net_device *ndev,
+			     const struct switchdev_obj *obj)
+{
+	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
+	struct cpsw_priv *priv = netdev_priv(ndev);
+	int err = 0;
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		err = cpsw_port_vlans_del(priv, vlan);
+		break;
+	case SWITCHDEV_OBJ_ID_PORT_MDB:
+		err = cpsw_port_mdb_del(priv, SWITCHDEV_OBJ_PORT_MDB(obj));
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+
+static const struct switchdev_ops cpsw_port_switchdev_ops = {
+	.switchdev_port_attr_set	= cpsw_port_attr_set,
+	.switchdev_port_attr_get	= cpsw_port_attr_get,
+	.switchdev_port_obj_add		= cpsw_port_obj_add,
+	.switchdev_port_obj_del		= cpsw_port_obj_del,
+};
+
+void cpsw_port_switchdev_init(struct net_device *ndev)
+{
+	ndev->switchdev_ops = &cpsw_port_switchdev_ops;
+}
diff --git a/drivers/net/ethernet/ti/cpsw_switchdev.h b/drivers/net/ethernet/ti/cpsw_switchdev.h
new file mode 100644
index 0000000..4940462
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw_switchdev.h
@@ -0,0 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <net/switchdev.h>
+
+void cpsw_port_switchdev_init(struct net_device *ndev);
-- 
2.7.4