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net: dsa: bcm_sf2: Support specifying VLAN tag egress rule 

The port to which the ASP is connected on 7278 is not capable of
processing VLAN tags as part of the Ethernet frame, so allow an user to
configure the egress VLAN policy they want to see applied by purposing
the h_ext.data[1] field. Bit 0 is used to indicate that 0=tagged,
1=untagged.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2020-03-30 14:38:54 -07:00 committed by David S. Miller
parent 7555020c44
commit 8b3abe304c
1 changed files with 38 additions and 2 deletions
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40
drivers/net/dsa/bcm_sf2_cfp.c
View File

@ -13,6 +13,8 @@
#include <net/dsa.h>
#include <linux/bitmap.h>
#include <net/flow_offload.h>
#include <net/switchdev.h>
#include <uapi/linux/if_bridge.h>
#include "bcm_sf2.h"
#include "bcm_sf2_regs.h"
@ -847,7 +849,9 @@ static int bcm_sf2_cfp_rule_insert(struct dsa_switch *ds, int port,
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
s8 cpu_port = dsa_to_port(ds, port)->cpu_dp->index;
__u64 ring_cookie = fs->ring_cookie;
struct switchdev_obj_port_vlan vlan;
unsigned int queue_num, port_num;
u16 vid;
int ret;
/* This rule is a Wake-on-LAN filter and we must specifically
@ -867,6 +871,34 @@ static int bcm_sf2_cfp_rule_insert(struct dsa_switch *ds, int port,
dsa_is_cpu_port(ds, port_num)) ||
port_num >= priv->hw_params.num_ports)
return -EINVAL;
/* If the rule is matching a particular VLAN, make sure that we honor
* the matching and have it tagged or untagged on the destination port,
* we do this on egress with a VLAN entry. The egress tagging attribute
* is expected to be provided in h_ext.data[1] bit 0. A 1 means untagged,
* a 0 means tagged.
*/
if (fs->flow_type & FLOW_EXT) {
/* We cannot support matching multiple VLAN IDs yet */
if ((be16_to_cpu(fs->m_ext.vlan_tci) & VLAN_VID_MASK) !=
VLAN_VID_MASK)
return -EINVAL;
vid = be16_to_cpu(fs->h_ext.vlan_tci) & VLAN_VID_MASK;
vlan.vid_begin = vid;
vlan.vid_end = vid;
if (cpu_to_be32(fs->h_ext.data[1]) & 1)
vlan.flags = BRIDGE_VLAN_INFO_UNTAGGED;
else
vlan.flags = 0;
ret = ds->ops->port_vlan_prepare(ds, port_num, &vlan);
if (ret)
return ret;
ds->ops->port_vlan_add(ds, port_num, &vlan);
}
/*
* We have a small oddity where Port 6 just does not have a
* valid bit here (so we substract by one).
@ -902,14 +934,18 @@ static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
int ret = -EINVAL;
/* Check for unsupported extensions */
if ((fs->flow_type & FLOW_MAC_EXT) ||
fs->m_ext.data[1])
if (fs->flow_type & FLOW_MAC_EXT)
return -EINVAL;
if (fs->location != RX_CLS_LOC_ANY &&
fs->location > bcm_sf2_cfp_rule_size(priv))
return -EINVAL;
if ((fs->flow_type & FLOW_EXT) &&
!(ds->ops->port_vlan_prepare || ds->ops->port_vlan_add ||
ds->ops->port_vlan_del))
return -EOPNOTSUPP;
if (fs->location != RX_CLS_LOC_ANY &&
test_bit(fs->location, priv->cfp.used))
return -EBUSY;