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net: dsa: mt7530: add support for port mirroring

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Add support for configuring port mirroring through the cls_matchall
classifier. We do a full ingress and/or egress capture towards a
capture port.
MT7530 supports one monitor port and multiple mirrored ports.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
DENG Qingfang 2020-03-06 20:35:35 +08:00 committed by David S. Miller
parent 6c1a55feca
commit 37feab6076
2 changed files with 67 additions and 0 deletions
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60
drivers/net/dsa/mt7530.c
View File

@ -1222,6 +1222,64 @@ mt7530_port_vlan_del(struct dsa_switch *ds, int port,
return 0;
}
static int mt7530_port_mirror_add(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror,
bool ingress)
{
struct mt7530_priv *priv = ds->priv;
u32 val;
/* Check for existent entry */
if ((ingress ? priv->mirror_rx : priv->mirror_tx) & BIT(port))
return -EEXIST;
val = mt7530_read(priv, MT7530_MFC);
/* MT7530 only supports one monitor port */
if (val & MIRROR_EN && MIRROR_PORT(val) != mirror->to_local_port)
return -EEXIST;
val |= MIRROR_EN;
val &= ~MIRROR_MASK;
val |= mirror->to_local_port;
mt7530_write(priv, MT7530_MFC, val);
val = mt7530_read(priv, MT7530_PCR_P(port));
if (ingress) {
val |= PORT_RX_MIR;
priv->mirror_rx |= BIT(port);
} else {
val |= PORT_TX_MIR;
priv->mirror_tx |= BIT(port);
}
mt7530_write(priv, MT7530_PCR_P(port), val);
return 0;
}
static void mt7530_port_mirror_del(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror)
{
struct mt7530_priv *priv = ds->priv;
u32 val;
val = mt7530_read(priv, MT7530_PCR_P(port));
if (mirror->ingress) {
val &= ~PORT_RX_MIR;
priv->mirror_rx &= ~BIT(port);
} else {
val &= ~PORT_TX_MIR;
priv->mirror_tx &= ~BIT(port);
}
mt7530_write(priv, MT7530_PCR_P(port), val);
if (!priv->mirror_rx && !priv->mirror_tx) {
val = mt7530_read(priv, MT7530_MFC);
val &= ~MIRROR_EN;
mt7530_write(priv, MT7530_MFC, val);
}
}
static enum dsa_tag_protocol
mtk_get_tag_protocol(struct dsa_switch *ds, int port,
enum dsa_tag_protocol mp)
@ -1613,6 +1671,8 @@ static const struct dsa_switch_ops mt7530_switch_ops = {
.port_vlan_prepare = mt7530_port_vlan_prepare,
.port_vlan_add = mt7530_port_vlan_add,
.port_vlan_del = mt7530_port_vlan_del,
.port_mirror_add = mt7530_port_mirror_add,
.port_mirror_del = mt7530_port_mirror_del,
.phylink_validate = mt7530_phylink_validate,
.phylink_mac_link_state = mt7530_phylink_mac_link_state,
.phylink_mac_config = mt7530_phylink_mac_config,

7
drivers/net/dsa/mt7530.h
View File

@ -36,6 +36,9 @@ enum {
#define CPU_EN BIT(7)
#define CPU_PORT(x) ((x) << 4)
#define CPU_MASK (0xf << 4)
#define MIRROR_EN BIT(3)
#define MIRROR_PORT(x) ((x & 0x7))
#define MIRROR_MASK 0x7
/* Registers for address table access */
#define MT7530_ATA1 0x74
@ -141,6 +144,8 @@ enum mt7530_stp_state {
/* Register for port control */
#define MT7530_PCR_P(x) (0x2004 + ((x) * 0x100))
#define PORT_TX_MIR BIT(9)
#define PORT_RX_MIR BIT(8)
#define PORT_VLAN(x) ((x) & 0x3)
enum mt7530_port_mode {
@ -460,6 +465,8 @@ struct mt7530_priv {
phy_interface_t p6_interface;
phy_interface_t p5_interface;
unsigned int p5_intf_sel;
u8 mirror_rx;
u8 mirror_tx;
struct mt7530_port ports[MT7530_NUM_PORTS];
/* protect among processes for registers access*/