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drivers: net: cpsw: Support ALLMULTI and fix IFF_PROMISC in switch mode

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The cpsw driver did not support the IFF_ALLMULTI flag which makes dynamic
multicast routing not work.  Related to this, when enabling IFF_PROMISC
in switch mode, all registered multicast addresses are flushed, resulting
in only broadcast and unicast traffic being received.

A new cpsw_ale_set_allmulti function now scans through the ALE entry
table and adds/removes the host port from the unregistered multicast
port mask of each vlan entry depending on the state of IFF_ALLMULTI.
In promiscious mode, cpsw_ale_set_allmulti is used to force reception
of all multicast traffic in addition to the unicast and broadcast traffic.

With this change dynamic multicast and promiscious mode both work in
switch mode.

Signed-off-by: Len Sorensen <lsorense@csclub.uwaterloo.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lennart Sorensen 2014-10-31 13:38:52 -04:00 committed by David S. Miller
parent 6f979eb3fc
commit 1e5c4bc497
3 changed files with 49 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/net/ethernet/ti/cpsw.c
View File

@ -638,12 +638,16 @@ static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
if (ndev->flags & IFF_PROMISC) {
/* Enable promiscuous mode */
cpsw_set_promiscious(ndev, true);
cpsw_ale_set_allmulti(priv->ale, IFF_ALLMULTI);
return;
} else {
/* Disable promiscuous mode */
cpsw_set_promiscious(ndev, false);
}
/* Restore allmulti on vlans if necessary */
cpsw_ale_set_allmulti(priv->ale, priv->ndev->flags & IFF_ALLMULTI);
/* Clear all mcast from ALE */
cpsw_ale_flush_multicast(priv->ale, ALE_ALL_PORTS << priv->host_port);
@ -1149,6 +1153,7 @@ static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
const int port = priv->host_port;
u32 reg;
int i;
int unreg_mcast_mask;
reg = (priv->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
CPSW2_PORT_VLAN;
@ -1158,9 +1163,14 @@ static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
for (i = 0; i < priv->data.slaves; i++)
slave_write(priv->slaves + i, vlan, reg);
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = ALE_ALL_PORTS;
else
unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS << port,
ALE_ALL_PORTS << port, ALE_ALL_PORTS << port,
(ALE_PORT_1 | ALE_PORT_2) << port);
unreg_mcast_mask << port);
}
static void cpsw_init_host_port(struct cpsw_priv *priv)
@ -1620,11 +1630,17 @@ static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
unsigned short vid)
{
int ret;
int unreg_mcast_mask;
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = ALE_ALL_PORTS;
else
unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
ret = cpsw_ale_add_vlan(priv->ale, vid,
ALE_ALL_PORTS << priv->host_port,
0, ALE_ALL_PORTS << priv->host_port,
(ALE_PORT_1 | ALE_PORT_2) << priv->host_port);
unreg_mcast_mask << priv->host_port);
if (ret != 0)
return ret;

29
drivers/net/ethernet/ti/cpsw_ale.c
View File

@ -443,6 +443,35 @@ int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port_mask)
return 0;
}
void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti)
{
u32 ale_entry[ALE_ENTRY_WORDS];
int type, idx;
int unreg_mcast = 0;
/* Only bother doing the work if the setting is actually changing */
if (ale->allmulti == allmulti)
return;
/* Remember the new setting to check against next time */
ale->allmulti = allmulti;
for (idx = 0; idx < ale->params.ale_entries; idx++) {
cpsw_ale_read(ale, idx, ale_entry);
type = cpsw_ale_get_entry_type(ale_entry);
if (type != ALE_TYPE_VLAN)
continue;
unreg_mcast = cpsw_ale_get_vlan_unreg_mcast(ale_entry);
if (allmulti)
unreg_mcast |= 1;
else
unreg_mcast &= ~1;
cpsw_ale_set_vlan_unreg_mcast(ale_entry, unreg_mcast);
cpsw_ale_write(ale, idx, ale_entry);
}
}
struct ale_control_info {
const char *name;
int offset, port_offset;

2
drivers/net/ethernet/ti/cpsw_ale.h
View File

@ -27,6 +27,7 @@ struct cpsw_ale {
struct cpsw_ale_params params;
struct timer_list timer;
unsigned long ageout;
int allmulti;
};
enum cpsw_ale_control {
@ -103,6 +104,7 @@ int cpsw_ale_del_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask,
int cpsw_ale_add_vlan(struct cpsw_ale *ale, u16 vid, int port, int untag,
int reg_mcast, int unreg_mcast);
int cpsw_ale_del_vlan(struct cpsw_ale *ale, u16 vid, int port);
void cpsw_ale_set_allmulti(struct cpsw_ale *ale, int allmulti);
int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control);
int cpsw_ale_control_set(struct cpsw_ale *ale, int port,