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net: dsa: b53: Support prepended Broadcom tags

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On BCM58xx devices (Northstar Plus), there is an accelerator attached to
port 8 which would only work if we use prepended Broadcom tags. Resolve
that difference in our get_tag_protocol() function by setting the
appropriate tagging protocol in that case. We need to change
b53_brcm_hdr_setup() a little bit now since we can deal with two types
of Broadcom tags.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2017-11-10 15:22:55 -08:00 committed by David S. Miller
parent b74b70c449
commit 1160603960
2 changed files with 11 additions and 4 deletions
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1
drivers/net/dsa/b53/Kconfig
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@ -2,6 +2,7 @@ menuconfig B53
tristate "Broadcom BCM53xx managed switch support"
depends on NET_DSA
select NET_DSA_TAG_BRCM
select NET_DSA_TAG_BRCM_PREPEND
help
This driver adds support for Broadcom managed switch chips. It supports
BCM5325E, BCM5365, BCM539x, BCM53115 and BCM53125 as well as BCM63XX

14
drivers/net/dsa/b53/b53_common.c
View File

@ -541,8 +541,8 @@ EXPORT_SYMBOL(b53_disable_port);
void b53_brcm_hdr_setup(struct dsa_switch *ds, int port)
{
bool tag_en = !!(ds->ops->get_tag_protocol(ds, port) ==
DSA_TAG_PROTO_BRCM);
bool tag_en = !(ds->ops->get_tag_protocol(ds, port) ==
DSA_TAG_PROTO_NONE);
struct b53_device *dev = ds->priv;
u8 hdr_ctl, val;
u16 reg;
@ -1505,8 +1505,14 @@ static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds,
*/
if (is5325(dev) || is5365(dev) || !b53_can_enable_brcm_tags(ds, port))
return DSA_TAG_PROTO_NONE;
else
return DSA_TAG_PROTO_BRCM;
/* Broadcom BCM58xx chips have a flow accelerator on Port 8
* which requires us to use the prepended Broadcom tag type
*/
if (dev->chip_id == BCM58XX_DEVICE_ID && port == B53_CPU_PORT)
return DSA_TAG_PROTO_BRCM_PREPEND;
return DSA_TAG_PROTO_BRCM;
}
int b53_mirror_add(struct dsa_switch *ds, int port,