1 files changed, 507 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/fman/mac.c b/drivers/net/ethernet/freescale/fman/mac.c
new file mode 100644
index 000000000..13e67f286
--- /dev/null
+++ b/drivers/net/ethernet/freescale/fman/mac.c
@@ -0,0 +1,507 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
+/*
+ * Copyright 2008 - 2015 Freescale Semiconductor Inc.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/of_mdio.h>
+#include <linux/device.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+#include <linux/phy_fixed.h>
+#include <linux/etherdevice.h>
+#include <linux/libfdt_env.h>
+
+#include "mac.h"
+#include "fman_mac.h"
+#include "fman_dtsec.h"
+#include "fman_tgec.h"
+#include "fman_memac.h"
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("FSL FMan MAC API based driver");
+
+struct mac_priv_s {
+	u8				cell_index;
+	struct fman			*fman;
+	/* List of multicast addresses */
+	struct list_head		mc_addr_list;
+	struct platform_device		*eth_dev;
+	u16				speed;
+};
+
+struct mac_address {
+	u8 addr[ETH_ALEN];
+	struct list_head list;
+};
+
+static void mac_exception(struct mac_device *mac_dev,
+			  enum fman_mac_exceptions ex)
+{
+	if (ex == FM_MAC_EX_10G_RX_FIFO_OVFL) {
+		/* don't flag RX FIFO after the first */
+		mac_dev->set_exception(mac_dev->fman_mac,
+				       FM_MAC_EX_10G_RX_FIFO_OVFL, false);
+		dev_err(mac_dev->dev, "10G MAC got RX FIFO Error = %x\n", ex);
+	}
+
+	dev_dbg(mac_dev->dev, "%s:%s() -> %d\n", KBUILD_BASENAME ".c",
+		__func__, ex);
+}
+
+int fman_set_multi(struct net_device *net_dev, struct mac_device *mac_dev)
+{
+	struct mac_priv_s	*priv;
+	struct mac_address	*old_addr, *tmp;
+	struct netdev_hw_addr	*ha;
+	int			err;
+	enet_addr_t		*addr;
+
+	priv = mac_dev->priv;
+
+	/* Clear previous address list */
+	list_for_each_entry_safe(old_addr, tmp, &priv->mc_addr_list, list) {
+		addr = (enet_addr_t *)old_addr->addr;
+		err = mac_dev->remove_hash_mac_addr(mac_dev->fman_mac, addr);
+		if (err < 0)
+			return err;
+
+		list_del(&old_addr->list);
+		kfree(old_addr);
+	}
+
+	/* Add all the addresses from the new list */
+	netdev_for_each_mc_addr(ha, net_dev) {
+		addr = (enet_addr_t *)ha->addr;
+		err = mac_dev->add_hash_mac_addr(mac_dev->fman_mac, addr);
+		if (err < 0)
+			return err;
+
+		tmp = kmalloc(sizeof(*tmp), GFP_ATOMIC);
+		if (!tmp)
+			return -ENOMEM;
+
+		ether_addr_copy(tmp->addr, ha->addr);
+		list_add(&tmp->list, &priv->mc_addr_list);
+	}
+	return 0;
+}
+
+/**
+ * fman_set_mac_active_pause
+ * @mac_dev:	A pointer to the MAC device
+ * @rx:		Pause frame setting for RX
+ * @tx:		Pause frame setting for TX
+ *
+ * Set the MAC RX/TX PAUSE frames settings
+ *
+ * Avoid redundant calls to FMD, if the MAC driver already contains the desired
+ * active PAUSE settings. Otherwise, the new active settings should be reflected
+ * in FMan.
+ *
+ * Return: 0 on success; Error code otherwise.
+ */
+int fman_set_mac_active_pause(struct mac_device *mac_dev, bool rx, bool tx)
+{
+	struct fman_mac *fman_mac = mac_dev->fman_mac;
+	int err = 0;
+
+	if (rx != mac_dev->rx_pause_active) {
+		err = mac_dev->set_rx_pause(fman_mac, rx);
+		if (likely(err == 0))
+			mac_dev->rx_pause_active = rx;
+	}
+
+	if (tx != mac_dev->tx_pause_active) {
+		u16 pause_time = (tx ? FSL_FM_PAUSE_TIME_ENABLE :
+					 FSL_FM_PAUSE_TIME_DISABLE);
+
+		err = mac_dev->set_tx_pause(fman_mac, 0, pause_time, 0);
+
+		if (likely(err == 0))
+			mac_dev->tx_pause_active = tx;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(fman_set_mac_active_pause);
+
+/**
+ * fman_get_pause_cfg
+ * @mac_dev:	A pointer to the MAC device
+ * @rx_pause:	Return value for RX setting
+ * @tx_pause:	Return value for TX setting
+ *
+ * Determine the MAC RX/TX PAUSE frames settings based on PHY
+ * autonegotiation or values set by eththool.
+ *
+ * Return: Pointer to FMan device.
+ */
+void fman_get_pause_cfg(struct mac_device *mac_dev, bool *rx_pause,
+			bool *tx_pause)
+{
+	struct phy_device *phy_dev = mac_dev->phy_dev;
+	u16 lcl_adv, rmt_adv;
+	u8 flowctrl;
+
+	*rx_pause = *tx_pause = false;
+
+	if (!phy_dev->duplex)
+		return;
+
+	/* If PAUSE autonegotiation is disabled, the TX/RX PAUSE settings
+	 * are those set by ethtool.
+	 */
+	if (!mac_dev->autoneg_pause) {
+		*rx_pause = mac_dev->rx_pause_req;
+		*tx_pause = mac_dev->tx_pause_req;
+		return;
+	}
+
+	/* Else if PAUSE autonegotiation is enabled, the TX/RX PAUSE
+	 * settings depend on the result of the link negotiation.
+	 */
+
+	/* get local capabilities */
+	lcl_adv = linkmode_adv_to_lcl_adv_t(phy_dev->advertising);
+
+	/* get link partner capabilities */
+	rmt_adv = 0;
+	if (phy_dev->pause)
+		rmt_adv |= LPA_PAUSE_CAP;
+	if (phy_dev->asym_pause)
+		rmt_adv |= LPA_PAUSE_ASYM;
+
+	/* Calculate TX/RX settings based on local and peer advertised
+	 * symmetric/asymmetric PAUSE capabilities.
+	 */
+	flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
+	if (flowctrl & FLOW_CTRL_RX)
+		*rx_pause = true;
+	if (flowctrl & FLOW_CTRL_TX)
+		*tx_pause = true;
+}
+EXPORT_SYMBOL(fman_get_pause_cfg);
+
+#define DTSEC_SUPPORTED \
+	(SUPPORTED_10baseT_Half \
+	| SUPPORTED_10baseT_Full \
+	| SUPPORTED_100baseT_Half \
+	| SUPPORTED_100baseT_Full \
+	| SUPPORTED_Autoneg \
+	| SUPPORTED_Pause \
+	| SUPPORTED_Asym_Pause \
+	| SUPPORTED_FIBRE \
+	| SUPPORTED_MII)
+
+static DEFINE_MUTEX(eth_lock);
+
+static const u16 phy2speed[] = {
+	[PHY_INTERFACE_MODE_MII]		= SPEED_100,
+	[PHY_INTERFACE_MODE_GMII]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_SGMII]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_TBI]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_RMII]		= SPEED_100,
+	[PHY_INTERFACE_MODE_RGMII]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_RGMII_ID]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_RGMII_RXID]	= SPEED_1000,
+	[PHY_INTERFACE_MODE_RGMII_TXID]	= SPEED_1000,
+	[PHY_INTERFACE_MODE_RTBI]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_QSGMII]		= SPEED_1000,
+	[PHY_INTERFACE_MODE_XGMII]		= SPEED_10000
+};
+
+static struct platform_device *dpaa_eth_add_device(int fman_id,
+						   struct mac_device *mac_dev)
+{
+	struct platform_device *pdev;
+	struct dpaa_eth_data data;
+	struct mac_priv_s	*priv;
+	static int dpaa_eth_dev_cnt;
+	int ret;
+
+	priv = mac_dev->priv;
+
+	data.mac_dev = mac_dev;
+	data.mac_hw_id = priv->cell_index;
+	data.fman_hw_id = fman_id;
+
+	mutex_lock(&eth_lock);
+	pdev = platform_device_alloc("dpaa-ethernet", dpaa_eth_dev_cnt);
+	if (!pdev) {
+		ret = -ENOMEM;
+		goto no_mem;
+	}
+
+	pdev->dev.parent = mac_dev->dev;
+
+	ret = platform_device_add_data(pdev, &data, sizeof(data));
+	if (ret)
+		goto err;
+
+	ret = platform_device_add(pdev);
+	if (ret)
+		goto err;
+
+	dpaa_eth_dev_cnt++;
+	mutex_unlock(&eth_lock);
+
+	return pdev;
+
+err:
+	platform_device_put(pdev);
+no_mem:
+	mutex_unlock(&eth_lock);
+
+	return ERR_PTR(ret);
+}
+
+static const struct of_device_id mac_match[] = {
+	{ .compatible	= "fsl,fman-dtsec", .data = dtsec_initialization },
+	{ .compatible	= "fsl,fman-xgec", .data = tgec_initialization },
+	{ .compatible	= "fsl,fman-memac", .data = memac_initialization },
+	{}
+};
+MODULE_DEVICE_TABLE(of, mac_match);
+
+static int mac_probe(struct platform_device *_of_dev)
+{
+	int			 err, i, nph;
+	int (*init)(struct mac_device *mac_dev, struct device_node *mac_node,
+		    struct fman_mac_params *params);
+	struct device		*dev;
+	struct device_node	*mac_node, *dev_node;
+	struct mac_device	*mac_dev;
+	struct platform_device	*of_dev;
+	struct mac_priv_s	*priv;
+	struct fman_mac_params	 params;
+	u32			 val;
+	u8			fman_id;
+	phy_interface_t          phy_if;
+
+	dev = &_of_dev->dev;
+	mac_node = dev->of_node;
+	init = of_device_get_match_data(dev);
+
+	mac_dev = devm_kzalloc(dev, sizeof(*mac_dev), GFP_KERNEL);
+	if (!mac_dev)
+		return -ENOMEM;
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	/* Save private information */
+	mac_dev->priv = priv;
+	mac_dev->dev = dev;
+
+	INIT_LIST_HEAD(&priv->mc_addr_list);
+
+	/* Get the FM node */
+	dev_node = of_get_parent(mac_node);
+	if (!dev_node) {
+		dev_err(dev, "of_get_parent(%pOF) failed\n",
+			mac_node);
+		return -EINVAL;
+	}
+
+	of_dev = of_find_device_by_node(dev_node);
+	if (!of_dev) {
+		dev_err(dev, "of_find_device_by_node(%pOF) failed\n", dev_node);
+		err = -EINVAL;
+		goto _return_of_node_put;
+	}
+
+	/* Get the FMan cell-index */
+	err = of_property_read_u32(dev_node, "cell-index", &val);
+	if (err) {
+		dev_err(dev, "failed to read cell-index for %pOF\n", dev_node);
+		err = -EINVAL;
+		goto _return_of_node_put;
+	}
+	/* cell-index 0 => FMan id 1 */
+	fman_id = (u8)(val + 1);
+
+	priv->fman = fman_bind(&of_dev->dev);
+	if (!priv->fman) {
+		dev_err(dev, "fman_bind(%pOF) failed\n", dev_node);
+		err = -ENODEV;
+		goto _return_of_node_put;
+	}
+
+	of_node_put(dev_node);
+
+	/* Get the address of the memory mapped registers */
+	mac_dev->res = platform_get_mem_or_io(_of_dev, 0);
+	if (!mac_dev->res) {
+		dev_err(dev, "could not get registers\n");
+		return -EINVAL;
+	}
+
+	err = devm_request_resource(dev, fman_get_mem_region(priv->fman),
+				    mac_dev->res);
+	if (err) {
+		dev_err_probe(dev, err, "could not request resource\n");
+		return err;
+	}
+
+	mac_dev->vaddr = devm_ioremap(dev, mac_dev->res->start,
+				      resource_size(mac_dev->res));
+	if (!mac_dev->vaddr) {
+		dev_err(dev, "devm_ioremap() failed\n");
+		return -EIO;
+	}
+
+	if (!of_device_is_available(mac_node))
+		return -ENODEV;
+
+	/* Get the cell-index */
+	err = of_property_read_u32(mac_node, "cell-index", &val);
+	if (err) {
+		dev_err(dev, "failed to read cell-index for %pOF\n", mac_node);
+		return -EINVAL;
+	}
+	priv->cell_index = (u8)val;
+
+	/* Get the MAC address */
+	err = of_get_mac_address(mac_node, mac_dev->addr);
+	if (err)
+		dev_warn(dev, "of_get_mac_address(%pOF) failed\n", mac_node);
+
+	/* Get the port handles */
+	nph = of_count_phandle_with_args(mac_node, "fsl,fman-ports", NULL);
+	if (unlikely(nph < 0)) {
+		dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n",
+			mac_node);
+		return nph;
+	}
+
+	if (nph != ARRAY_SIZE(mac_dev->port)) {
+		dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n",
+			mac_node);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
+		/* Find the port node */
+		dev_node = of_parse_phandle(mac_node, "fsl,fman-ports", i);
+		if (!dev_node) {
+			dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n",
+				mac_node);
+			return -EINVAL;
+		}
+
+		of_dev = of_find_device_by_node(dev_node);
+		if (!of_dev) {
+			dev_err(dev, "of_find_device_by_node(%pOF) failed\n",
+				dev_node);
+			err = -EINVAL;
+			goto _return_of_node_put;
+		}
+
+		mac_dev->port[i] = fman_port_bind(&of_dev->dev);
+		if (!mac_dev->port[i]) {
+			dev_err(dev, "dev_get_drvdata(%pOF) failed\n",
+				dev_node);
+			err = -EINVAL;
+			goto _return_of_node_put;
+		}
+		of_node_put(dev_node);
+	}
+
+	/* Get the PHY connection type */
+	err = of_get_phy_mode(mac_node, &phy_if);
+	if (err) {
+		dev_warn(dev,
+			 "of_get_phy_mode() for %pOF failed. Defaulting to SGMII\n",
+			 mac_node);
+		phy_if = PHY_INTERFACE_MODE_SGMII;
+	}
+	mac_dev->phy_if = phy_if;
+
+	priv->speed		= phy2speed[mac_dev->phy_if];
+	params.max_speed	= priv->speed;
+	mac_dev->if_support	= DTSEC_SUPPORTED;
+	/* We don't support half-duplex in SGMII mode */
+	if (mac_dev->phy_if == PHY_INTERFACE_MODE_SGMII)
+		mac_dev->if_support &= ~(SUPPORTED_10baseT_Half |
+					SUPPORTED_100baseT_Half);
+
+	/* Gigabit support (no half-duplex) */
+	if (params.max_speed == 1000)
+		mac_dev->if_support |= SUPPORTED_1000baseT_Full;
+
+	/* The 10G interface only supports one mode */
+	if (mac_dev->phy_if == PHY_INTERFACE_MODE_XGMII)
+		mac_dev->if_support = SUPPORTED_10000baseT_Full;
+
+	/* Get the rest of the PHY information */
+	mac_dev->phy_node = of_parse_phandle(mac_node, "phy-handle", 0);
+
+	params.basex_if		= false;
+	params.mac_id		= priv->cell_index;
+	params.fm		= (void *)priv->fman;
+	params.exception_cb	= mac_exception;
+	params.event_cb		= mac_exception;
+
+	err = init(mac_dev, mac_node, &params);
+	if (err < 0) {
+		dev_err(dev, "mac_dev->init() = %d\n", err);
+		of_node_put(mac_dev->phy_node);
+		return err;
+	}
+
+	/* pause frame autonegotiation enabled */
+	mac_dev->autoneg_pause = true;
+
+	/* By intializing the values to false, force FMD to enable PAUSE frames
+	 * on RX and TX
+	 */
+	mac_dev->rx_pause_req = true;
+	mac_dev->tx_pause_req = true;
+	mac_dev->rx_pause_active = false;
+	mac_dev->tx_pause_active = false;
+	err = fman_set_mac_active_pause(mac_dev, true, true);
+	if (err < 0)
+		dev_err(dev, "fman_set_mac_active_pause() = %d\n", err);
+
+	if (!is_zero_ether_addr(mac_dev->addr))
+		dev_info(dev, "FMan MAC address: %pM\n", mac_dev->addr);
+
+	priv->eth_dev = dpaa_eth_add_device(fman_id, mac_dev);
+	if (IS_ERR(priv->eth_dev)) {
+		dev_err(dev, "failed to add Ethernet platform device for MAC %d\n",
+			priv->cell_index);
+		priv->eth_dev = NULL;
+	}
+
+	return err;
+
+_return_of_node_put:
+	of_node_put(dev_node);
+	return err;
+}
+
+static int mac_remove(struct platform_device *pdev)
+{
+	struct mac_device *mac_dev = platform_get_drvdata(pdev);
+
+	platform_device_unregister(mac_dev->priv->eth_dev);
+	return 0;
+}
+
+static struct platform_driver mac_driver = {
+	.driver = {
+		.name		= KBUILD_MODNAME,
+		.of_match_table	= mac_match,
+	},
+	.probe		= mac_probe,
+	.remove		= mac_remove,
+};
+
+builtin_platform_driver(mac_driver);