net: dsa: qca8k: add GLOBAL_FC settings needed for qca8327

Switch qca8327 needs special settings for the GLOBAL_FC_THRES regs.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index b598930..10e3e1c 100644 (file)
--- 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 42d9083..eceeacf 100644 (file)
--- 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)