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Subject[PATCH v3 2/3] net: dsa: add support for switchdev VLAN objects
Date
This patch adds the glue between DSA and switchdev operations to add,
delete and dump SWITCHDEV_OBJ_PORT_VLAN objects.

This is a first step to link the "bridge vlan" command with hardware
entries for DSA compatible switch chips.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
include/net/dsa.h | 9 ++++
net/dsa/dsa_priv.h | 6 +++
net/dsa/slave.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 152 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index fbca63b..cabf2a5 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -302,6 +302,15 @@ struct dsa_switch_driver {
const unsigned char *addr, u16 vid);
int (*fdb_getnext)(struct dsa_switch *ds, int port,
unsigned char *addr, bool *is_static);
+
+ /*
+ * VLAN support
+ */
+ int (*port_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
+ u16 bridge_flags);
+ int (*port_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
+ int (*port_vlan_dump)(struct dsa_switch *ds, int port, u16 vid,
+ u16 *bridge_flags);
};

void register_switch_driver(struct dsa_switch_driver *type);
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index d5f1f9b..9029717 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -13,6 +13,7 @@

#include <linux/phy.h>
#include <linux/netdevice.h>
+#include <linux/if_vlan.h>

struct dsa_device_ops {
netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);
@@ -47,6 +48,11 @@ struct dsa_slave_priv {
int old_duplex;

struct net_device *bridge_dev;
+
+ /*
+ * Which VLANs this port is a member of.
+ */
+ DECLARE_BITMAP(vlan_bitmap, VLAN_N_VID);
};

/* dsa.c */
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 04ffad3..47c459b 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -18,6 +18,7 @@
#include <net/rtnetlink.h>
#include <net/switchdev.h>
#include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
#include "dsa_priv.h"

/* slave mii_bus handling ***************************************************/
@@ -363,6 +364,136 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
return ret;
}

+static int dsa_slave_port_vlans_add(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ int vid, err = 0;
+
+ if (!ds->drv->port_vlan_add)
+ return -EOPNOTSUPP;
+
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+ err = ds->drv->port_vlan_add(ds, p->port, vid, vlan->flags);
+ if (err)
+ break;
+ set_bit(vid, p->vlan_bitmap);
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_obj_add(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ int err;
+
+ /*
+ * Skip the prepare phase, since currently the DSA drivers don't need to
+ * allocate any memory for operations and they will not fail to HW
+ * (unless something horrible goes wrong on the MDIO bus, in which case
+ * the prepare phase wouldn't have been able to predict anyway).
+ */
+ if (obj->trans != SWITCHDEV_TRANS_COMMIT)
+ return 0;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_PORT_VLAN:
+ err = dsa_slave_port_vlans_add(dev, obj);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_vlans_del(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ int vid, err = 0;
+
+ if (!ds->drv->port_vlan_del)
+ return -EOPNOTSUPP;
+
+ for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+ err = ds->drv->port_vlan_del(ds, p->port, vid);
+ if (err)
+ break;
+ clear_bit(vid, p->vlan_bitmap);
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_obj_del(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ int err;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_PORT_VLAN:
+ err = dsa_slave_port_vlans_del(dev, obj);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_vlans_dump(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+ int vid, err = 0;
+
+ if (!ds->drv->port_vlan_dump)
+ return -EOPNOTSUPP;
+
+ for_each_set_bit(vid, p->vlan_bitmap, VLAN_N_VID) {
+ u16 flags = 0;
+
+ err = ds->drv->port_vlan_dump(ds, p->port, vid, &flags);
+ if (err)
+ break;
+
+ vlan->flags = flags;
+ vlan->vid_begin = vlan->vid_end = vid;
+ err = obj->cb(dev, obj);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+static int dsa_slave_port_obj_dump(struct net_device *dev,
+ struct switchdev_obj *obj)
+{
+ int err;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_PORT_VLAN:
+ err = dsa_slave_port_vlans_dump(dev, obj);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
static int dsa_slave_bridge_port_join(struct net_device *dev,
struct net_device *br)
{
@@ -697,11 +828,17 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_fdb_dump = dsa_slave_fdb_dump,
.ndo_do_ioctl = dsa_slave_ioctl,
.ndo_get_iflink = dsa_slave_get_iflink,
+ .ndo_bridge_getlink = switchdev_port_bridge_getlink,
+ .ndo_bridge_setlink = switchdev_port_bridge_setlink,
+ .ndo_bridge_dellink = switchdev_port_bridge_dellink,
};

static const struct switchdev_ops dsa_slave_switchdev_ops = {
.switchdev_port_attr_get = dsa_slave_port_attr_get,
.switchdev_port_attr_set = dsa_slave_port_attr_set,
+ .switchdev_port_obj_add = dsa_slave_port_obj_add,
+ .switchdev_port_obj_del = dsa_slave_port_obj_del,
+ .switchdev_port_obj_dump = dsa_slave_port_obj_dump,
};

static void dsa_slave_adjust_link(struct net_device *dev)
--
2.4.5


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