[PATCH v2 08/10] net: hisilicon: Offset buf address to adapt HI13X1_GMAC

[Jiangfeng Xiao]

The buf unit size of HI13X1_GMAC is cache_line_size,
which is 64, so the address we write to the buf register
needs to be shifted right by 6 bits.

The 31st bit of the PPE_CFG_CPU_ADD_ADDR register
of HI13X1_GMAC indicates whether to release the buffer
of the message, and the low indicates that it is valid.

Signed-off-by: Jiangfeng Xiao <xiaojiangf...@huawei.com>
---
 drivers/net/ethernet/hisilicon/hip04_eth.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c 
b/drivers/net/ethernet/hisilicon/hip04_eth.c
index 5328219..c578934 100644
--- a/drivers/net/ethernet/hisilicon/hip04_eth.c
+++ b/drivers/net/ethernet/hisilicon/hip04_eth.c
@@ -120,12 +120,20 @@
 #define PPE_CFG_STS_RX_PKT_CNT_RC      BIT(0)
 #define PPE_CFG_QOS_VMID_MODE          BIT(15)
 #define PPE_CFG_BUS_LOCAL_REL          (BIT(9) | BIT(15) | BIT(19) | BIT(23))
+
+/* buf unit size is cache_line_size, which is 64, so the shift is 6 */
+#define PPE_BUF_SIZE_SHIFT             6
+#define PPE_TX_BUF_HOLD                        BIT(31)
 #else
 #define PPE_CFG_QOS_VMID_GRP_SHIFT     8
 #define PPE_CFG_RX_CTRL_ALIGN_SHIFT    11
 #define PPE_CFG_STS_RX_PKT_CNT_RC      BIT(12)
 #define PPE_CFG_QOS_VMID_MODE          BIT(14)
 #define PPE_CFG_BUS_LOCAL_REL          BIT(14)
+
+/* buf unit size is 1, so the shift is 6 */
+#define PPE_BUF_SIZE_SHIFT             0
+#define PPE_TX_BUF_HOLD                        0
 #endif /* CONFIG_HI13X1_GMAC */
 
 #define PPE_CFG_RX_FIFO_FSFU           BIT(11)
@@ -286,7 +294,7 @@ static void hip04_config_fifo(struct hip04_priv *priv)
        val |= PPE_CFG_QOS_VMID_MODE;
        writel_relaxed(val, priv->base + PPE_CFG_QOS_VMID_GEN);
 
-       val = RX_BUF_SIZE;
+       val = RX_BUF_SIZE >> PPE_BUF_SIZE_SHIFT;
        regmap_write(priv->map, priv->port * 4 + PPE_CFG_RX_BUF_SIZE, val);
 
        val = RX_DESC_NUM << PPE_CFG_RX_DEPTH_SHIFT;
@@ -369,12 +377,18 @@ static void hip04_mac_disable(struct net_device *ndev)
 
 static void hip04_set_xmit_desc(struct hip04_priv *priv, dma_addr_t phys)
 {
-       writel(phys, priv->base + PPE_CFG_CPU_ADD_ADDR);
+       u32 val;
+
+       val = phys >> PPE_BUF_SIZE_SHIFT | PPE_TX_BUF_HOLD;
+       writel(val, priv->base + PPE_CFG_CPU_ADD_ADDR);
 }
 
 static void hip04_set_recv_desc(struct hip04_priv *priv, dma_addr_t phys)
 {
-       regmap_write(priv->map, priv->port * 4 + PPE_CFG_RX_ADDR, phys);
+       u32 val;
+
+       val = phys >> PPE_BUF_SIZE_SHIFT;
+       regmap_write(priv->map, priv->port * 4 + PPE_CFG_RX_ADDR, val);
 }
 
 static u32 hip04_recv_cnt(struct hip04_priv *priv)
-- 
1.8.5.6