Commit aef1e0d5 authored by David S. Miller's avatar David S. Miller

Merge branch 'dsa-b53-Support-prepended-Broadcom-tags'

Florian Fainelli says:

====================
net: dsa: b53: Support prepended Broadcom tags

This patch series adds support for prepended 4-bytes Broadcom tags that we
already support. This type of tag will typically be used when interfaced to
a SoC like BCM58xx (NorthStar Plus) which supports a Flow Accelerator (WIP).
In that case, we need to support a slightly different tagging format.

The first patch does a bit of re-factoring and passes a port index to
the get_tag_protocol() function since at least two different drivers need
that type of information (mt7530, b53) to support tagging or not.
====================
Signed-off-by: default avatarDavid S. Miller <[email protected]>
parents ee9d3429 11606039
......@@ -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
......
......@@ -541,7 +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) == 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;
......@@ -1478,41 +1479,40 @@ void b53_br_fast_age(struct dsa_switch *ds, int port)
}
EXPORT_SYMBOL(b53_br_fast_age);
static bool b53_can_enable_brcm_tags(struct dsa_switch *ds)
static bool b53_can_enable_brcm_tags(struct dsa_switch *ds, int port)
{
unsigned int brcm_tag_mask;
unsigned int i;
/* Broadcom switches will accept enabling Broadcom tags on the
* following ports: 5, 7 and 8, any other port is not supported
*/
brcm_tag_mask = BIT(B53_CPU_PORT_25) | BIT(7) | BIT(B53_CPU_PORT);
for (i = 0; i < ds->num_ports; i++) {
if (dsa_is_cpu_port(ds, i)) {
if (!(BIT(i) & brcm_tag_mask)) {
dev_warn(ds->dev,
"Port %d is not Broadcom tag capable\n",
i);
return false;
}
}
switch (port) {
case B53_CPU_PORT_25:
case 7:
case B53_CPU_PORT:
return true;
}
return true;
dev_warn(ds->dev, "Port %d is not Broadcom tag capable\n", port);
return false;
}
static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds,
int port)
{
struct b53_device *dev = ds->priv;
/* Older models support a different tag format that we do not
* support in net/dsa/tag_brcm.c yet.
*/
if (is5325(dev) || is5365(dev) || !b53_can_enable_brcm_tags(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,
......
......@@ -35,7 +35,8 @@
#include "b53/b53_priv.h"
#include "b53/b53_regs.h"
static enum dsa_tag_protocol bcm_sf2_sw_get_tag_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol bcm_sf2_sw_get_tag_protocol(struct dsa_switch *ds,
int port)
{
return DSA_TAG_PROTO_BRCM;
}
......
......@@ -64,7 +64,8 @@ struct dsa_loop_priv {
static struct phy_device *phydevs[PHY_MAX_ADDR];
static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
int port)
{
dev_dbg(ds->dev, "%s\n", __func__);
......
......@@ -894,7 +894,8 @@ static int lan9303_check_device(struct lan9303 *chip)
/* ---------------------------- DSA -----------------------------------*/
static enum dsa_tag_protocol lan9303_get_tag_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol lan9303_get_tag_protocol(struct dsa_switch *ds,
int port)
{
return DSA_TAG_PROTO_LAN9303;
}
......
......@@ -394,7 +394,8 @@ static int ksz_setup(struct dsa_switch *ds)
return 0;
}
static enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds,
int port)
{
return DSA_TAG_PROTO_KSZ;
}
......
......@@ -907,11 +907,11 @@ mt7530_port_fdb_dump(struct dsa_switch *ds, int port,
}
static enum dsa_tag_protocol
mtk_get_tag_protocol(struct dsa_switch *ds)
mtk_get_tag_protocol(struct dsa_switch *ds, int port)
{
struct mt7530_priv *priv = ds->priv;
if (!dsa_is_cpu_port(ds, MT7530_CPU_PORT)) {
if (port != MT7530_CPU_PORT) {
dev_warn(priv->dev,
"port not matched with tagging CPU port\n");
return DSA_TAG_PROTO_NONE;
......
......@@ -70,7 +70,8 @@ static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr)
return NULL;
}
static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds,
int port)
{
return DSA_TAG_PROTO_TRAILER;
}
......
......@@ -3731,7 +3731,8 @@ static int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
return 0;
}
static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds)
static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds,
int port)
{
struct mv88e6xxx_chip *chip = ds->priv;
......
......@@ -823,7 +823,7 @@ qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
}
static enum dsa_tag_protocol
qca8k_get_tag_protocol(struct dsa_switch *ds)
qca8k_get_tag_protocol(struct dsa_switch *ds, int port)
{
return DSA_TAG_PROTO_QCA;
}
......
......@@ -29,6 +29,7 @@ struct fixed_phy_status;
enum dsa_tag_protocol {
DSA_TAG_PROTO_NONE = 0,
DSA_TAG_PROTO_BRCM,
DSA_TAG_PROTO_BRCM_PREPEND,
DSA_TAG_PROTO_DSA,
DSA_TAG_PROTO_EDSA,
DSA_TAG_PROTO_KSZ,
......@@ -321,7 +322,8 @@ struct dsa_switch_ops {
struct device *host_dev, int sw_addr,
void **priv);
enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds);
enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
int port);
int (*setup)(struct dsa_switch *ds);
u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
......
......@@ -19,6 +19,9 @@ if NET_DSA
config NET_DSA_TAG_BRCM
bool
config NET_DSA_TAG_BRCM_PREPEND
bool
config NET_DSA_TAG_DSA
bool
......
......@@ -5,6 +5,7 @@ dsa_core-y += dsa.o dsa2.o legacy.o master.o port.o slave.o switch.o
# tagging formats
dsa_core-$(CONFIG_NET_DSA_TAG_BRCM) += tag_brcm.o
dsa_core-$(CONFIG_NET_DSA_TAG_BRCM_PREPEND) += tag_brcm.o
dsa_core-$(CONFIG_NET_DSA_TAG_DSA) += tag_dsa.o
dsa_core-$(CONFIG_NET_DSA_TAG_EDSA) += tag_edsa.o
dsa_core-$(CONFIG_NET_DSA_TAG_KSZ) += tag_ksz.o
......
......@@ -44,6 +44,9 @@ const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
#ifdef CONFIG_NET_DSA_TAG_BRCM
[DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM_PREPEND
[DSA_TAG_PROTO_BRCM_PREPEND] = &brcm_prepend_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_DSA
[DSA_TAG_PROTO_DSA] = &dsa_netdev_ops,
#endif
......
......@@ -539,7 +539,7 @@ static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master)
const struct dsa_device_ops *tag_ops;
enum dsa_tag_protocol tag_protocol;
tag_protocol = ds->ops->get_tag_protocol(ds);
tag_protocol = ds->ops->get_tag_protocol(ds, dp->index);
tag_ops = dsa_resolve_tag_protocol(tag_protocol);
if (IS_ERR(tag_ops)) {
dev_warn(ds->dev, "No tagger for this switch\n");
......
......@@ -191,6 +191,7 @@ void dsa_switch_unregister_notifier(struct dsa_switch *ds);
/* tag_brcm.c */
extern const struct dsa_device_ops brcm_netdev_ops;
extern const struct dsa_device_ops brcm_prepend_netdev_ops;
/* tag_dsa.c */
extern const struct dsa_device_ops dsa_netdev_ops;
......
......@@ -151,7 +151,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
const struct dsa_device_ops *tag_ops;
enum dsa_tag_protocol tag_protocol;
tag_protocol = ops->get_tag_protocol(ds);
tag_protocol = ops->get_tag_protocol(ds, dst->cpu_dp->index);
tag_ops = dsa_resolve_tag_protocol(tag_protocol);
if (IS_ERR(tag_ops))
return PTR_ERR(tag_ops);
......
......@@ -59,7 +59,9 @@
#define BRCM_EG_TC_MASK 0x7
#define BRCM_EG_PID_MASK 0x1f
static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev)
static struct sk_buff *brcm_tag_xmit_ll(struct sk_buff *skb,
struct net_device *dev,
unsigned int offset)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
u16 queue = skb_get_queue_mapping(skb);
......@@ -70,10 +72,10 @@ static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev
skb_push(skb, BRCM_TAG_LEN);
memmove(skb->data, skb->data + BRCM_TAG_LEN, 2 * ETH_ALEN);
if (offset)
memmove(skb->data, skb->data + BRCM_TAG_LEN, offset);
/* Build the tag after the MAC Source Address */
brcm_tag = skb->data + 2 * ETH_ALEN;
brcm_tag = skb->data + offset;
/* Set the ingress opcode, traffic class, tag enforcment is
* deprecated
......@@ -94,8 +96,10 @@ static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev
return skb;
}
static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt)
static struct sk_buff *brcm_tag_rcv_ll(struct sk_buff *skb,
struct net_device *dev,
struct packet_type *pt,
unsigned int offset)
{
int source_port;
u8 *brcm_tag;
......@@ -103,8 +107,7 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
if (unlikely(!pskb_may_pull(skb, BRCM_TAG_LEN)))
return NULL;
/* skb->data points to the EtherType, the tag is right before it */
brcm_tag = skb->data - 2;
brcm_tag = skb->data - offset;
/* The opcode should never be different than 0b000 */
if (unlikely((brcm_tag[0] >> BRCM_OPCODE_SHIFT) & BRCM_OPCODE_MASK))
......@@ -126,15 +129,60 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
/* Remove Broadcom tag and update checksum */
skb_pull_rcsum(skb, BRCM_TAG_LEN);
return skb;
}
#ifdef CONFIG_NET_DSA_TAG_BRCM
static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb,
struct net_device *dev)
{
/* Build the tag after the MAC Source Address */
return brcm_tag_xmit_ll(skb, dev, 2 * ETH_ALEN);
}
static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt)
{
struct sk_buff *nskb;
/* skb->data points to the EtherType, the tag is right before it */
nskb = brcm_tag_rcv_ll(skb, dev, pt, 2);
if (!nskb)
return nskb;
/* Move the Ethernet DA and SA */
memmove(skb->data - ETH_HLEN,
skb->data - ETH_HLEN - BRCM_TAG_LEN,
memmove(nskb->data - ETH_HLEN,
nskb->data - ETH_HLEN - BRCM_TAG_LEN,
2 * ETH_ALEN);
return skb;
return nskb;
}
const struct dsa_device_ops brcm_netdev_ops = {
.xmit = brcm_tag_xmit,
.rcv = brcm_tag_rcv,
};
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM_PREPEND
static struct sk_buff *brcm_tag_xmit_prepend(struct sk_buff *skb,
struct net_device *dev)
{
/* tag is prepended to the packet */
return brcm_tag_xmit_ll(skb, dev, 0);
}
static struct sk_buff *brcm_tag_rcv_prepend(struct sk_buff *skb,
struct net_device *dev,
struct packet_type *pt)
{
/* tag is prepended to the packet */
return brcm_tag_rcv_ll(skb, dev, pt, ETH_HLEN);
}
const struct dsa_device_ops brcm_prepend_netdev_ops = {
.xmit = brcm_tag_xmit_prepend,
.rcv = brcm_tag_rcv_prepend,
};
#endif
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