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Date: Sun, 11 Oct 2015 18:08:35 -0400
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
"David S. Miller" <davem@...emloft.net>,
Guenter Roeck <linux@...ck-us.net>,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Neil Armstrong <narmstrong@...libre.com>,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next 1/4] net: dsa: mv88e6xxx: bridges do not need an FID
With 88E6352 and similar switch chips, each port has a map to restrict
which output port this input port can egress frames to.
The current driver code implements hardware bridging using this feature,
and assigns to a bridge group the FID of its first member.
Now that 802.1Q is fully implemented in this driver, a Linux bridge
which is a simple untagged VLAN, already gets its own FID.
This patch gets rid of the per-bridge FID and explicits the usage of the
port based VLAN map feature.
Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
drivers/net/dsa/mv88e6xxx.c | 157 +++++++++++---------------------------------
drivers/net/dsa/mv88e6xxx.h | 1 -
2 files changed, 40 insertions(+), 118 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index e381bfc..254f9bb 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -1046,11 +1046,6 @@ static int _mv88e6xxx_atu_flush(struct dsa_switch *ds, u16 fid, bool static_too)
return _mv88e6xxx_atu_flush_move(ds, &entry, static_too);
}
-static int _mv88e6xxx_flush_fid(struct dsa_switch *ds, int fid)
-{
- return _mv88e6xxx_atu_flush(ds, fid, false);
-}
-
static int _mv88e6xxx_atu_move(struct dsa_switch *ds, u16 fid, int from_port,
int to_port, bool static_too)
{
@@ -1112,130 +1107,56 @@ abort:
return ret;
}
-/* Must be called with smi lock held */
-static int _mv88e6xxx_update_port_config(struct dsa_switch *ds, int port)
+static int _mv88e6xxx_port_vlan_map_set(struct dsa_switch *ds, int port,
+ u16 output_ports)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
- u8 fid = ps->fid[port];
- u16 reg = fid << 12;
+ const u16 mask = (1 << ps->num_ports) - 1;
+ int reg;
- if (dsa_is_cpu_port(ds, port))
- reg |= ds->phys_port_mask;
- else
- reg |= (ps->bridge_mask[fid] |
- (1 << dsa_upstream_port(ds))) & ~(1 << port);
+ reg = _mv88e6xxx_reg_read(ds, REG_PORT(port), PORT_BASE_VLAN);
+ if (reg < 0)
+ return reg;
+
+ reg &= ~mask;
+ reg |= output_ports & mask;
return _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_BASE_VLAN, reg);
}
-/* Must be called with smi lock held */
-static int _mv88e6xxx_update_bridge_config(struct dsa_switch *ds, int fid)
-{
- struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
- int port;
- u32 mask;
- int ret;
-
- mask = ds->phys_port_mask;
- while (mask) {
- port = __ffs(mask);
- mask &= ~(1 << port);
- if (ps->fid[port] != fid)
- continue;
-
- ret = _mv88e6xxx_update_port_config(ds, port);
- if (ret)
- return ret;
- }
-
- return _mv88e6xxx_flush_fid(ds, fid);
-}
-
/* Bridge handling functions */
+static int mv88e6xxx_map_bridge(struct dsa_switch *ds, u16 members)
+{
+ struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
+ const unsigned long output = members | BIT(dsa_upstream_port(ds));
+ int port, err = 0;
+
+ mutex_lock(&ps->smi_mutex);
+
+ for_each_set_bit(port, &output, ps->num_ports) {
+ if (dsa_is_cpu_port(ds, port))
+ continue;
+
+ err = _mv88e6xxx_port_vlan_map_set(ds, port, output & ~port);
+ if (err)
+ break;
+ }
+
+ mutex_unlock(&ps->smi_mutex);
+
+ return err;
+}
+
+
int mv88e6xxx_join_bridge(struct dsa_switch *ds, int port, u32 br_port_mask)
{
- struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
- int ret = 0;
- u32 nmask;
- int fid;
-
- /* If the bridge group is not empty, join that group.
- * Otherwise create a new group.
- */
- fid = ps->fid[port];
- nmask = br_port_mask & ~(1 << port);
- if (nmask)
- fid = ps->fid[__ffs(nmask)];
-
- nmask = ps->bridge_mask[fid] | (1 << port);
- if (nmask != br_port_mask) {
- netdev_err(ds->ports[port],
- "join: Bridge port mask mismatch fid=%d mask=0x%x expected 0x%x\n",
- fid, br_port_mask, nmask);
- return -EINVAL;
- }
-
- mutex_lock(&ps->smi_mutex);
-
- ps->bridge_mask[fid] = br_port_mask;
-
- if (fid != ps->fid[port]) {
- clear_bit(ps->fid[port], ps->fid_bitmap);
- ps->fid[port] = fid;
- ret = _mv88e6xxx_update_bridge_config(ds, fid);
- }
-
- mutex_unlock(&ps->smi_mutex);
-
- return ret;
+ return mv88e6xxx_map_bridge(ds, br_port_mask);
}
int mv88e6xxx_leave_bridge(struct dsa_switch *ds, int port, u32 br_port_mask)
{
- struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
- u8 fid, newfid;
- int ret;
-
- fid = ps->fid[port];
-
- if (ps->bridge_mask[fid] != br_port_mask) {
- netdev_err(ds->ports[port],
- "leave: Bridge port mask mismatch fid=%d mask=0x%x expected 0x%x\n",
- fid, br_port_mask, ps->bridge_mask[fid]);
- return -EINVAL;
- }
-
- /* If the port was the last port of a bridge, we are done.
- * Otherwise assign a new fid to the port, and fix up
- * the bridge configuration.
- */
- if (br_port_mask == (1 << port))
- return 0;
-
- mutex_lock(&ps->smi_mutex);
-
- newfid = find_next_zero_bit(ps->fid_bitmap, VLAN_N_VID, 1);
- if (unlikely(newfid > ps->num_ports)) {
- netdev_err(ds->ports[port], "all first %d FIDs are used\n",
- ps->num_ports);
- ret = -ENOSPC;
- goto unlock;
- }
-
- ps->fid[port] = newfid;
- set_bit(newfid, ps->fid_bitmap);
- ps->bridge_mask[fid] &= ~(1 << port);
- ps->bridge_mask[newfid] = 1 << port;
-
- ret = _mv88e6xxx_update_bridge_config(ds, fid);
- if (!ret)
- ret = _mv88e6xxx_update_bridge_config(ds, newfid);
-
-unlock:
- mutex_unlock(&ps->smi_mutex);
-
- return ret;
+ return mv88e6xxx_map_bridge(ds, br_port_mask & ~port);
}
int mv88e6xxx_port_stp_update(struct dsa_switch *ds, int port, u8 state)
@@ -2233,10 +2154,12 @@ static int mv88e6xxx_setup_port(struct dsa_switch *ds, int port)
ps->fid[port] = fid;
set_bit(fid, ps->fid_bitmap);
- if (!dsa_is_cpu_port(ds, port))
- ps->bridge_mask[fid] = 1 << port;
+ if (dsa_is_cpu_port(ds, port))
+ reg = BIT(ps->num_ports) - 1;
+ else
+ reg = BIT(dsa_upstream_port(ds));
- ret = _mv88e6xxx_update_port_config(ds, port);
+ ret = _mv88e6xxx_port_vlan_map_set(ds, port, reg & ~port);
if (ret)
goto abort;
diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h
index 1347a73..716f692 100644
--- a/drivers/net/dsa/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx.h
@@ -411,7 +411,6 @@ struct mv88e6xxx_priv_state {
DECLARE_BITMAP(fid_bitmap, VLAN_N_VID); /* FIDs 1 to 4095 available */
u16 fid[DSA_MAX_PORTS]; /* per (non-bridged) port FID */
- u16 bridge_mask[DSA_MAX_PORTS]; /* br groups (indexed by FID) */
unsigned long port_state_update_mask;
u8 port_state[DSA_MAX_PORTS];
--
2.6.0
--
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