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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/ethernet/freescale/fman/mac.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/ethernet/freescale/fman/mac.c')
-rw-r--r--drivers/net/ethernet/freescale/fman/mac.c507
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);