To support jumbo frames, set GWMDNC register with acceptable maximum
values for TX and RX.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
drivers/net/ethernet/renesas/rswitch.c | 2 ++
drivers/net/ethernet/renesas/rswitch.h | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index eda5ea56674c..6bd76a88bd40 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -668,6 +668,8 @@ static int rswitch_gwca_hw_init(struct rswitch_private *priv)
iowrite32(upper_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC0);
iowrite32(lower_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC10);
iowrite32(upper_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC00);
+ iowrite32(GWMDNC_TSDMN(1) | GWMDNC_TXDMN(0x1e) | GWMDNC_RXDMN(0x1f),
+ priv->addr + GWMDNC);
iowrite32(GWCA_TS_IRQ_BIT, priv->addr + GWTSDCC0);
iowrite32(GWTPC_PPPL(GWCA_IPV_NUM), priv->addr + GWTPC0);
diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 2ac9a86b6238..17e617ec4187 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -773,6 +773,10 @@ enum rswitch_gwca_mode {
#define GWARIRM_ARIOG BIT(0)
#define GWARIRM_ARR BIT(1)
+#define GWMDNC_TSDMN(num) (((num) << 16) & GENMASK(17, 16))
+#define GWMDNC_TXDMN(num) (((num) << 8) & GENMASK(12, 8))
+#define GWMDNC_RXDMN(num) ((num) & GENMASK(4, 0))
+
#define GWDCC_BALR BIT(24)
#define GWDCC_DCP_MASK GENMASK(18, 16)
#define GWDCC_DCP(prio) FIELD_PREP(GWDCC_DCP_MASK, (prio))
--
2.34.1
