drivers: net: xgene: Preparing for adding 10GbE support

- Rearranged code to pave the way for adding 10GbE support
- Added mac_ops structure containing function pointers for mac specific functions
- Added port_ops structure containing function pointers for port specific functions

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/apm/xgene/xgene_enet_hw.c

@@ -402,7 +402,7 @@ static int xgene_mii_phy_read(struct xgene_enet_pdata *pdata,
 	return data;
 }
 
-void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
+static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
 {
 	u32 addr0, addr1;
 	u8 *dev_addr = pdata->ndev->dev_addr;
@@ -436,13 +436,13 @@ static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
 	return 0;
 }
 
-void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
+static void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
 {
 	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
 	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0);
 }
 
-void xgene_gmac_init(struct xgene_enet_pdata *pdata, int speed)
+static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
 {
 	u32 value, mc2;
 	u32 intf_ctl, rgmii;
@@ -456,7 +456,7 @@ void xgene_gmac_init(struct xgene_enet_pdata *pdata, int speed)
 	xgene_enet_rd_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, &intf_ctl);
 	xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii);
 
-	switch (speed) {
+	switch (pdata->phy_speed) {
 	case SPEED_10:
 		ENET_INTERFACE_MODE2_SET(&mc2, 1);
 		CFG_MACMODE_SET(&icm0, 0);
@@ -525,8 +525,8 @@ static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, val);
 }
 
-void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
-			   u32 dst_ring_num, u16 bufpool_id)
+static void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
+				  u32 dst_ring_num, u16 bufpool_id)
 {
 	u32 cb;
 	u32 fpsel;
@@ -544,7 +544,7 @@ void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
 	xgene_enet_wr_csr(pdata, CLE_BYPASS_REG1_0_ADDR, cb);
 }
 
-void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
+static void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
 {
 	u32 data;
 
@@ -552,7 +552,7 @@ void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
 }
 
-void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
+static void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
 {
 	u32 data;
 
@@ -560,7 +560,7 @@ void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
 }
 
-void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
+static void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
 {
 	u32 data;
 
@@ -568,7 +568,7 @@ void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
 }
 
-void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
+static void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
 {
 	u32 data;
 
@@ -576,7 +576,7 @@ void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
 }
 
-void xgene_enet_reset(struct xgene_enet_pdata *pdata)
+static void xgene_enet_reset(struct xgene_enet_pdata *pdata)
 {
 	u32 val;
 
@@ -593,7 +593,7 @@ void xgene_enet_reset(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, val);
 }
 
-void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
+static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
 {
 	clk_disable_unprepare(pdata->clk);
 }
@@ -627,10 +627,10 @@ static void xgene_enet_adjust_link(struct net_device *ndev)
 
 	if (phydev->link) {
 		if (pdata->phy_speed != phydev->speed) {
-			xgene_gmac_init(pdata, phydev->speed);
+			pdata->phy_speed = phydev->speed;
+			xgene_gmac_init(pdata);
 			xgene_gmac_rx_enable(pdata);
 			xgene_gmac_tx_enable(pdata);
-			pdata->phy_speed = phydev->speed;
 			phy_print_status(phydev);
 		}
 	} else {
@@ -726,3 +726,19 @@ void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata)
 	mdiobus_free(pdata->mdio_bus);
 	pdata->mdio_bus = NULL;
 }
+
+struct xgene_mac_ops xgene_gmac_ops = {
+	.init = xgene_gmac_init,
+	.reset = xgene_gmac_reset,
+	.rx_enable = xgene_gmac_rx_enable,
+	.tx_enable = xgene_gmac_tx_enable,
+	.rx_disable = xgene_gmac_rx_disable,
+	.tx_disable = xgene_gmac_tx_disable,
+	.set_mac_addr = xgene_gmac_set_mac_addr,
+};
+
+struct xgene_port_ops xgene_gport_ops = {
+	.reset = xgene_enet_reset,
+	.cle_bypass = xgene_enet_cle_bypass,
+	.shutdown = xgene_gport_shutdown,
+};

drivers/net/ethernet/apm/xgene/xgene_enet_hw.h

@@ -318,20 +318,10 @@ void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
 			    struct xgene_enet_pdata *pdata,
 			    enum xgene_enet_err_code status);
 
-void xgene_enet_reset(struct xgene_enet_pdata *priv);
-void xgene_gmac_reset(struct xgene_enet_pdata *priv);
-void xgene_gmac_init(struct xgene_enet_pdata *priv, int speed);
-void xgene_gmac_tx_enable(struct xgene_enet_pdata *priv);
-void xgene_gmac_rx_enable(struct xgene_enet_pdata *priv);
-void xgene_gmac_tx_disable(struct xgene_enet_pdata *priv);
-void xgene_gmac_rx_disable(struct xgene_enet_pdata *priv);
-void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata);
-void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
-			   u32 dst_ring_num, u16 bufpool_id);
-void xgene_gport_shutdown(struct xgene_enet_pdata *priv);
-void xgene_gmac_get_tx_stats(struct xgene_enet_pdata *pdata);
-
 int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata);
 void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata);
 
+extern struct xgene_mac_ops xgene_gmac_ops;
+extern struct xgene_port_ops xgene_gport_ops;
+
 #endif /* __XGENE_ENET_HW_H__ */

drivers/net/ethernet/apm/xgene/xgene_enet_main.c

@@ -413,7 +413,7 @@ static void xgene_enet_timeout(struct net_device *ndev)
 {
 	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
 
-	xgene_gmac_reset(pdata);
+	pdata->mac_ops->reset(pdata);
 }
 
 static int xgene_enet_register_irq(struct net_device *ndev)
@@ -445,10 +445,11 @@ static void xgene_enet_free_irq(struct net_device *ndev)
 static int xgene_enet_open(struct net_device *ndev)
 {
 	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct xgene_mac_ops *mac_ops = pdata->mac_ops;
 	int ret;
 
-	xgene_gmac_tx_enable(pdata);
-	xgene_gmac_rx_enable(pdata);
+	mac_ops->tx_enable(pdata);
+	mac_ops->rx_enable(pdata);
 
 	ret = xgene_enet_register_irq(ndev);
 	if (ret)
@@ -466,6 +467,7 @@ static int xgene_enet_open(struct net_device *ndev)
 static int xgene_enet_close(struct net_device *ndev)
 {
 	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+	struct xgene_mac_ops *mac_ops = pdata->mac_ops;
 
 	netif_stop_queue(ndev);
 
@@ -476,8 +478,8 @@ static int xgene_enet_close(struct net_device *ndev)
 	xgene_enet_free_irq(ndev);
 	xgene_enet_process_ring(pdata->rx_ring, -1);
 
-	xgene_gmac_tx_disable(pdata);
-	xgene_gmac_rx_disable(pdata);
+	mac_ops->tx_disable(pdata);
+	mac_ops->rx_disable(pdata);
 
 	return 0;
 }
@@ -724,7 +726,7 @@ static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr)
 	ret = eth_mac_addr(ndev, addr);
 	if (ret)
 		return ret;
-	xgene_gmac_set_mac_addr(pdata);
+	pdata->mac_ops->set_mac_addr(pdata);
 
 	return ret;
 }
@@ -834,8 +836,8 @@ static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
 	u16 dst_ring_num;
 	int ret;
 
-	xgene_gmac_tx_disable(pdata);
-	xgene_gmac_rx_disable(pdata);
+	pdata->mac_ops->tx_disable(pdata);
+	pdata->mac_ops->rx_disable(pdata);
 
 	ret = xgene_enet_create_desc_rings(ndev);
 	if (ret) {
@@ -853,11 +855,17 @@ static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
 	}
 
 	dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring);
-	xgene_enet_cle_bypass(pdata, dst_ring_num, buf_pool->id);
+	pdata->port_ops->cle_bypass(pdata, dst_ring_num, buf_pool->id);
 
 	return ret;
 }
 
+static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata)
+{
+	pdata->mac_ops = &xgene_gmac_ops;
+	pdata->port_ops = &xgene_gport_ops;
+}
+
 static int xgene_enet_probe(struct platform_device *pdev)
 {
 	struct net_device *ndev;
@@ -886,8 +894,9 @@ static int xgene_enet_probe(struct platform_device *pdev)
 	if (ret)
 		goto err;
 
-	xgene_enet_reset(pdata);
-	xgene_gmac_init(pdata, SPEED_1000);
+	xgene_enet_setup_ops(pdata);
+	pdata->port_ops->reset(pdata);
+	pdata->mac_ops->init(pdata);
 
 	ret = register_netdev(ndev);
 	if (ret) {
@@ -918,19 +927,21 @@ err:
 static int xgene_enet_remove(struct platform_device *pdev)
 {
 	struct xgene_enet_pdata *pdata;
+	struct xgene_mac_ops *mac_ops;
 	struct net_device *ndev;
 
 	pdata = platform_get_drvdata(pdev);
+	mac_ops = pdata->mac_ops;
 	ndev = pdata->ndev;
 
-	xgene_gmac_rx_disable(pdata);
-	xgene_gmac_tx_disable(pdata);
+	mac_ops->rx_disable(pdata);
+	mac_ops->tx_disable(pdata);
 
 	netif_napi_del(&pdata->rx_ring->napi);
 	xgene_enet_mdio_remove(pdata);
 	xgene_enet_delete_desc_rings(pdata);
 	unregister_netdev(ndev);
-	xgene_gport_shutdown(pdata);
+	pdata->port_ops->shutdown(pdata);
 	free_netdev(ndev);
 
 	return 0;
@@ -956,5 +967,6 @@ module_platform_driver(xgene_enet_driver);
 
 MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver");
 MODULE_VERSION(XGENE_DRV_VERSION);
+MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>");
 MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>");
 MODULE_LICENSE("GPL");

drivers/net/ethernet/apm/xgene/xgene_enet_main.h

@@ -68,6 +68,23 @@ struct xgene_enet_desc_ring {
 	};
 };
 
+struct xgene_mac_ops {
+	void (*init)(struct xgene_enet_pdata *pdata);
+	void (*reset)(struct xgene_enet_pdata *pdata);
+	void (*tx_enable)(struct xgene_enet_pdata *pdata);
+	void (*rx_enable)(struct xgene_enet_pdata *pdata);
+	void (*tx_disable)(struct xgene_enet_pdata *pdata);
+	void (*rx_disable)(struct xgene_enet_pdata *pdata);
+	void (*set_mac_addr)(struct xgene_enet_pdata *pdata);
+};
+
+struct xgene_port_ops {
+	void (*reset)(struct xgene_enet_pdata *pdata);
+	void (*cle_bypass)(struct xgene_enet_pdata *pdata,
+			   u32 dst_ring_num, u16 bufpool_id);
+	void (*shutdown)(struct xgene_enet_pdata *pdata);
+};
+
 /* ethernet private data */
 struct xgene_enet_pdata {
 	struct net_device *ndev;
@@ -98,6 +115,8 @@ struct xgene_enet_pdata {
 	u32 speed;
 	u16 rm;
 	struct rtnl_link_stats64 stats;
+	struct xgene_mac_ops *mac_ops;
+	struct xgene_port_ops *port_ops;
 };
 
 /* Set the specified value into a bit-field defined by its starting position