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From 0fc57e4b5e39461fc0a54aae0afe4241363a7267 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Fri, 14 May 2021 23:00:03 +0200
Subject: [PATCH] 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>
---
drivers/net/dsa/qca8k.c | 10 ++++++++++
drivers/net/dsa/qca8k.h | 6 ++++++
2 files changed, 16 insertions(+)
--- 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;
--- 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)
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