From d715fa6431a794e6a8cdb53d87acd3d03ed8a941 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Fri, 12 Feb 2016 12:09:38 -0500 Subject: [PATCH 1/4] net: dsa: mv88e6xxx: add port private structure Add a per-port mv88e6xxx_priv_port structure to store per-port related data, instead of adding several arrays of DSA_MAX_PORTS elements in the mv88e6xxx_priv_state structure. It currently only contains the port STP state. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 4 ++-- drivers/net/dsa/mv88e6xxx.h | 7 ++++++- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 512c8c0be1b4..b0e00edb302e 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -1131,7 +1131,7 @@ int mv88e6xxx_port_stp_update(struct dsa_switch *ds, int port, u8 state) /* mv88e6xxx_port_stp_update may be called with softirqs disabled, * so we can not update the port state directly but need to schedule it. */ - ps->port_state[port] = stp_state; + ps->ports[port].state = stp_state; set_bit(port, &ps->port_state_update_mask); schedule_work(&ps->bridge_work); @@ -1925,7 +1925,7 @@ static void mv88e6xxx_bridge_work(struct work_struct *work) while (ps->port_state_update_mask) { port = __ffs(ps->port_state_update_mask); clear_bit(port, &ps->port_state_update_mask); - mv88e6xxx_set_port_state(ds, port, ps->port_state[port]); + mv88e6xxx_set_port_state(ds, port, ps->ports[port].state); } } diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h index ca08f913d302..63a6f587e9e8 100644 --- a/drivers/net/dsa/mv88e6xxx.h +++ b/drivers/net/dsa/mv88e6xxx.h @@ -379,6 +379,10 @@ struct mv88e6xxx_vtu_stu_entry { u8 data[DSA_MAX_PORTS]; }; +struct mv88e6xxx_priv_port { + u8 state; +}; + struct mv88e6xxx_priv_state { /* When using multi-chip addressing, this mutex protects * access to the indirect access registers. (In single-chip @@ -415,8 +419,9 @@ struct mv88e6xxx_priv_state { int id; /* switch product id */ int num_ports; /* number of switch ports */ + struct mv88e6xxx_priv_port ports[DSA_MAX_PORTS]; + unsigned long port_state_update_mask; - u8 port_state[DSA_MAX_PORTS]; struct work_struct bridge_work; }; From a6692754d61a6b3735803783f394880805675f99 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Fri, 12 Feb 2016 12:09:39 -0500 Subject: [PATCH 2/4] net: dsa: pass bridge down to drivers Some DSA drivers may or may not support multiple software bridges on top of an hardware switch. It is more convenient for them to access the bridge's net_device for finer configuration. Removing the need to craft and access a bitmask also simplifies the code. This patch changes the signature of bridge related functions, update DSA drivers, and removes dsa_slave_br_port_mask. Signed-off-by: Vivien Didelot Tested-by: Florian Fainelli Signed-off-by: David S. Miller --- Documentation/networking/dsa/dsa.txt | 7 ++----- drivers/net/dsa/bcm_sf2.c | 12 ++++++----- drivers/net/dsa/bcm_sf2.h | 2 ++ drivers/net/dsa/mv88e6xxx.c | 13 ++++++++++-- drivers/net/dsa/mv88e6xxx.h | 6 ++++-- include/net/dsa.h | 5 ++--- net/dsa/slave.c | 31 ++-------------------------- 7 files changed, 30 insertions(+), 46 deletions(-) diff --git a/Documentation/networking/dsa/dsa.txt b/Documentation/networking/dsa/dsa.txt index aa9c1f9313cd..ebf21530471f 100644 --- a/Documentation/networking/dsa/dsa.txt +++ b/Documentation/networking/dsa/dsa.txt @@ -524,17 +524,14 @@ Bridge layer - port_join_bridge: bridge layer function invoked when a given switch port is added to a bridge, this function should be doing the necessary at the switch level to permit the joining port from being added to the relevant logical - domain for it to ingress/egress traffic with other members of the bridge. DSA - does nothing but calculate a bitmask of switch ports currently members of the - specified bridge being requested the join + domain for it to ingress/egress traffic with other members of the bridge. - port_leave_bridge: bridge layer function invoked when a given switch port is removed from a bridge, this function should be doing the necessary at the switch level to deny the leaving port from ingress/egress traffic from the remaining bridge members. When the port leaves the bridge, it should be aged out at the switch hardware for the switch to (re) learn MAC addresses behind - this port. DSA calculates the bitmask of ports still members of the bridge - being left + this port. - port_stp_update: bridge layer function invoked when a given switch port STP state is computed by the bridge layer and should be propagated to switch diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index 6f946fedbb77..3f627598f277 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -483,16 +483,17 @@ static int bcm_sf2_sw_fast_age_port(struct dsa_switch *ds, int port) } static int bcm_sf2_sw_br_join(struct dsa_switch *ds, int port, - u32 br_port_mask) + struct net_device *bridge) { struct bcm_sf2_priv *priv = ds_to_priv(ds); unsigned int i; u32 reg, p_ctl; + priv->port_sts[port].bridge_dev = bridge; p_ctl = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(port)); for (i = 0; i < priv->hw_params.num_ports; i++) { - if (!((1 << i) & br_port_mask)) + if (priv->port_sts[i].bridge_dev != bridge) continue; /* Add this local port to the remote port VLAN control @@ -515,10 +516,10 @@ static int bcm_sf2_sw_br_join(struct dsa_switch *ds, int port, return 0; } -static int bcm_sf2_sw_br_leave(struct dsa_switch *ds, int port, - u32 br_port_mask) +static int bcm_sf2_sw_br_leave(struct dsa_switch *ds, int port) { struct bcm_sf2_priv *priv = ds_to_priv(ds); + struct net_device *bridge = priv->port_sts[port].bridge_dev; unsigned int i; u32 reg, p_ctl; @@ -526,7 +527,7 @@ static int bcm_sf2_sw_br_leave(struct dsa_switch *ds, int port, for (i = 0; i < priv->hw_params.num_ports; i++) { /* Don't touch the remaining ports */ - if (!((1 << i) & br_port_mask)) + if (priv->port_sts[i].bridge_dev != bridge) continue; reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(i)); @@ -541,6 +542,7 @@ static int bcm_sf2_sw_br_leave(struct dsa_switch *ds, int port, core_writel(priv, p_ctl, CORE_PORT_VLAN_CTL_PORT(port)); priv->port_sts[port].vlan_ctl_mask = p_ctl; + priv->port_sts[port].bridge_dev = NULL; return 0; } diff --git a/drivers/net/dsa/bcm_sf2.h b/drivers/net/dsa/bcm_sf2.h index 6bba1c98d764..200b1f5fdb56 100644 --- a/drivers/net/dsa/bcm_sf2.h +++ b/drivers/net/dsa/bcm_sf2.h @@ -50,6 +50,8 @@ struct bcm_sf2_port_status { struct ethtool_eee eee; u32 vlan_ctl_mask; + + struct net_device *bridge_dev; }; struct bcm_sf2_arl_entry { diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index b0e00edb302e..2e515e8a95fe 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -1889,13 +1889,22 @@ unlock: return err; } -int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port, u32 members) +int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port, + struct net_device *bridge) { + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + + ps->ports[port].bridge_dev = bridge; + return 0; } -int mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port, u32 members) +int mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port) { + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + + ps->ports[port].bridge_dev = NULL; + return 0; } diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h index 63a6f587e9e8..260b4918e427 100644 --- a/drivers/net/dsa/mv88e6xxx.h +++ b/drivers/net/dsa/mv88e6xxx.h @@ -380,6 +380,7 @@ struct mv88e6xxx_vtu_stu_entry { }; struct mv88e6xxx_priv_port { + struct net_device *bridge_dev; u8 state; }; @@ -481,8 +482,9 @@ int mv88e6xxx_phy_write_indirect(struct dsa_switch *ds, int addr, int regnum, int mv88e6xxx_get_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e); int mv88e6xxx_set_eee(struct dsa_switch *ds, int port, struct phy_device *phydev, struct ethtool_eee *e); -int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port, u32 members); -int mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port, u32 members); +int mv88e6xxx_port_bridge_join(struct dsa_switch *ds, int port, + struct net_device *bridge); +int mv88e6xxx_port_bridge_leave(struct dsa_switch *ds, int port); int mv88e6xxx_port_stp_update(struct dsa_switch *ds, int port, u8 state); int mv88e6xxx_port_vlan_prepare(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan, diff --git a/include/net/dsa.h b/include/net/dsa.h index 26a0e86e611e..1c845d7bf0b2 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -297,9 +297,8 @@ struct dsa_switch_driver { * Bridge integration */ int (*port_join_bridge)(struct dsa_switch *ds, int port, - u32 br_port_mask); - int (*port_leave_bridge)(struct dsa_switch *ds, int port, - u32 br_port_mask); + struct net_device *bridge); + int (*port_leave_bridge)(struct dsa_switch *ds, int port); int (*port_stp_update)(struct dsa_switch *ds, int port, u8 state); diff --git a/net/dsa/slave.c b/net/dsa/slave.c index ab24521beb4d..ab515df5f493 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -385,31 +385,6 @@ static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) return -EOPNOTSUPP; } -/* Return a bitmask of all ports being currently bridged within a given bridge - * device. Note that on leave, the mask will still return the bitmask of ports - * currently bridged, prior to port removal, and this is exactly what we want. - */ -static u32 dsa_slave_br_port_mask(struct dsa_switch *ds, - struct net_device *bridge) -{ - struct dsa_slave_priv *p; - unsigned int port; - u32 mask = 0; - - for (port = 0; port < DSA_MAX_PORTS; port++) { - if (!dsa_is_port_initialized(ds, port)) - continue; - - p = netdev_priv(ds->ports[port]); - - if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT && - p->bridge_dev == bridge) - mask |= 1 << port; - } - - return mask; -} - static int dsa_slave_stp_update(struct net_device *dev, u8 state) { struct dsa_slave_priv *p = netdev_priv(dev); @@ -533,8 +508,7 @@ static int dsa_slave_bridge_port_join(struct net_device *dev, p->bridge_dev = br; if (ds->drv->port_join_bridge) - ret = ds->drv->port_join_bridge(ds, p->port, - dsa_slave_br_port_mask(ds, br)); + ret = ds->drv->port_join_bridge(ds, p->port, br); return ret; } @@ -547,8 +521,7 @@ static int dsa_slave_bridge_port_leave(struct net_device *dev) if (ds->drv->port_leave_bridge) - ret = ds->drv->port_leave_bridge(ds, p->port, - dsa_slave_br_port_mask(ds, p->bridge_dev)); + ret = ds->drv->port_leave_bridge(ds, p->port); p->bridge_dev = NULL; From da9c359e19f0a72a386a0e83a098b6dae21aa3c3 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Fri, 12 Feb 2016 12:09:40 -0500 Subject: [PATCH 3/4] net: dsa: mv88e6xxx: check hardware VLAN in use The DSA drivers now have access to the VLAN prepare phase and the bridge net_device. It is easier to check for overlapping bridges from within the driver. Thus add such check in mv88e6xxx_port_vlan_prepare. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 64 +++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 2e515e8a95fe..685dcb047979 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -1471,14 +1471,78 @@ static int _mv88e6xxx_vlan_init(struct dsa_switch *ds, u16 vid, return 0; } +static int mv88e6xxx_port_check_hw_vlan(struct dsa_switch *ds, int port, + u16 vid_begin, u16 vid_end) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + struct mv88e6xxx_vtu_stu_entry vlan; + int i, err; + + if (!vid_begin) + return -EOPNOTSUPP; + + mutex_lock(&ps->smi_mutex); + + err = _mv88e6xxx_vtu_vid_write(ds, vid_begin - 1); + if (err) + goto unlock; + + do { + err = _mv88e6xxx_vtu_getnext(ds, &vlan); + if (err) + goto unlock; + + if (!vlan.valid) + break; + + if (vlan.vid > vid_end) + break; + + for (i = 0; i < ps->num_ports; ++i) { + if (dsa_is_dsa_port(ds, i) || dsa_is_cpu_port(ds, i)) + continue; + + if (vlan.data[i] == + GLOBAL_VTU_DATA_MEMBER_TAG_NON_MEMBER) + continue; + + if (ps->ports[i].bridge_dev == + ps->ports[port].bridge_dev) + break; /* same bridge, check next VLAN */ + + netdev_warn(ds->ports[port], + "hardware VLAN %d already used by %s\n", + vlan.vid, + netdev_name(ps->ports[i].bridge_dev)); + err = -EOPNOTSUPP; + goto unlock; + } + } while (vlan.vid < vid_end); + +unlock: + mutex_unlock(&ps->smi_mutex); + + return err; +} + int mv88e6xxx_port_vlan_prepare(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan, struct switchdev_trans *trans) { + int err; + /* We reserve a few VLANs to isolate unbridged ports */ if (vlan->vid_end >= 4000) return -EOPNOTSUPP; + /* If the requested port doesn't belong to the same bridge as the VLAN + * members, do not support it (yet) and fallback to software VLAN. + */ + err = mv88e6xxx_port_check_hw_vlan(ds, port, vlan->vid_begin, + vlan->vid_end); + if (err) + return err; + /* We don't need any dynamic resource from the kernel (yet), * so skip the prepare phase. */ From 9d2dd736698e6f1dc176b9669b6390ddcd2063b1 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Fri, 12 Feb 2016 12:09:41 -0500 Subject: [PATCH 4/4] net: dsa: remove dsa_bridge_check_vlan_range DSA drivers may support multiple bridge groups with the same hardware VLAN. The mv88e6xxx driver which cannot yet, already has its own check for overlapping bridges. Thus remove the check from the DSA layer. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- net/dsa/slave.c | 50 ------------------------------------------------- 1 file changed, 50 deletions(-) diff --git a/net/dsa/slave.c b/net/dsa/slave.c index ab515df5f493..14ca9784ec0c 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -201,47 +201,6 @@ out: return 0; } -static int dsa_bridge_check_vlan_range(struct dsa_switch *ds, - const struct net_device *bridge, - u16 vid_begin, u16 vid_end) -{ - struct dsa_slave_priv *p; - struct net_device *dev, *vlan_br; - DECLARE_BITMAP(members, DSA_MAX_PORTS); - DECLARE_BITMAP(untagged, DSA_MAX_PORTS); - u16 vid; - int member, err; - - if (!ds->drv->vlan_getnext || !vid_begin) - return -EOPNOTSUPP; - - vid = vid_begin - 1; - - do { - err = ds->drv->vlan_getnext(ds, &vid, members, untagged); - if (err) - break; - - if (vid > vid_end) - break; - - member = find_first_bit(members, DSA_MAX_PORTS); - if (member == DSA_MAX_PORTS) - continue; - - dev = ds->ports[member]; - p = netdev_priv(dev); - vlan_br = p->bridge_dev; - if (vlan_br == bridge) - continue; - - netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid); - return -EOPNOTSUPP; - } while (vid < vid_end); - - return err == -ENOENT ? 0 : err; -} - static int dsa_slave_port_vlan_add(struct net_device *dev, const struct switchdev_obj_port_vlan *vlan, struct switchdev_trans *trans) @@ -254,15 +213,6 @@ static int dsa_slave_port_vlan_add(struct net_device *dev, if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add) return -EOPNOTSUPP; - /* If the requested port doesn't belong to the same bridge as - * the VLAN members, fallback to software VLAN (hopefully). - */ - err = dsa_bridge_check_vlan_range(ds, p->bridge_dev, - vlan->vid_begin, - vlan->vid_end); - if (err) - return err; - err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans); if (err) return err;