[RFC PATCH net-next v4 16/28] net: dsa: qca8k: add GLOBAL_FC settings needed for qca8327

Ansuel Smith
2021-05-08T00:30:18Z

Switch qca8327 needs special settings for the GLOBAL_FC_THRES regs.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/net/dsa/qca8k.c | 10 ++++++++++
drivers/net/dsa/qca8k.h | 6 ++++++
2 files changed, 16 insertions(+)

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 612fa77164ae..301bb94aba84 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -942,6 +942,16 @@ 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)
--
2.30.2