diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index b598930190e1..10e3e1ca7e95 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -930,6 +930,16 @@ qca8k_setup(struct dsa_switch *ds) } } + /* Special GLOBAL_FC_THRESH value are needed for ar8327 switch */ + if (priv->switch_id == QCA8K_ID_QCA8327) { + mask = QCA8K_GLOBAL_FC_GOL_XON_THRES(288) | + QCA8K_GLOBAL_FC_GOL_XOFF_THRES(496); + qca8k_rmw(priv, QCA8K_REG_GLOBAL_FC_THRESH, + QCA8K_GLOBAL_FC_GOL_XON_THRES_S | + QCA8K_GLOBAL_FC_GOL_XOFF_THRES_S, + mask); + } + /* Setup our port MTUs to match power on defaults */ for (i = 0; i < QCA8K_NUM_PORTS; i++) priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN; diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h index 42d90836dffa..eceeacfe2c5d 100644 --- a/drivers/net/dsa/qca8k.h +++ b/drivers/net/dsa/qca8k.h @@ -168,6 +168,12 @@ #define QCA8K_PORT_LOOKUP_STATE GENMASK(18, 16) #define QCA8K_PORT_LOOKUP_LEARN BIT(20) +#define QCA8K_REG_GLOBAL_FC_THRESH 0x800 +#define QCA8K_GLOBAL_FC_GOL_XON_THRES(x) ((x) << 16) +#define QCA8K_GLOBAL_FC_GOL_XON_THRES_S GENMASK(24, 16) +#define QCA8K_GLOBAL_FC_GOL_XOFF_THRES(x) ((x) << 0) +#define QCA8K_GLOBAL_FC_GOL_XOFF_THRES_S GENMASK(8, 0) + #define QCA8K_REG_PORT_HOL_CTRL0(_i) (0x970 + (_i) * 0x8) #define QCA8K_PORT_HOL_CTRL0_EG_PRI0_BUF GENMASK(3, 0) #define QCA8K_PORT_HOL_CTRL0_EG_PRI0(x) ((x) << 0)