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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/dpaa2/dpaa2-mac.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c')
-rw-r--r--drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
new file mode 100644
index 000000000..49ff85633
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -0,0 +1,574 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2019 NXP */
+
+#include <linux/acpi.h>
+#include <linux/pcs-lynx.h>
+#include <linux/phy/phy.h>
+#include <linux/property.h>
+
+#include "dpaa2-eth.h"
+#include "dpaa2-mac.h"
+
+#define phylink_to_dpaa2_mac(config) \
+ container_of((config), struct dpaa2_mac, phylink_config)
+
+#define DPMAC_PROTOCOL_CHANGE_VER_MAJOR 4
+#define DPMAC_PROTOCOL_CHANGE_VER_MINOR 8
+
+#define DPAA2_MAC_FEATURE_PROTOCOL_CHANGE BIT(0)
+
+static int dpaa2_mac_cmp_ver(struct dpaa2_mac *mac,
+ u16 ver_major, u16 ver_minor)
+{
+ if (mac->ver_major == ver_major)
+ return mac->ver_minor - ver_minor;
+ return mac->ver_major - ver_major;
+}
+
+static void dpaa2_mac_detect_features(struct dpaa2_mac *mac)
+{
+ mac->features = 0;
+
+ if (dpaa2_mac_cmp_ver(mac, DPMAC_PROTOCOL_CHANGE_VER_MAJOR,
+ DPMAC_PROTOCOL_CHANGE_VER_MINOR) >= 0)
+ mac->features |= DPAA2_MAC_FEATURE_PROTOCOL_CHANGE;
+}
+
+static int phy_mode(enum dpmac_eth_if eth_if, phy_interface_t *if_mode)
+{
+ *if_mode = PHY_INTERFACE_MODE_NA;
+
+ switch (eth_if) {
+ case DPMAC_ETH_IF_RGMII:
+ *if_mode = PHY_INTERFACE_MODE_RGMII;
+ break;
+ case DPMAC_ETH_IF_USXGMII:
+ *if_mode = PHY_INTERFACE_MODE_USXGMII;
+ break;
+ case DPMAC_ETH_IF_QSGMII:
+ *if_mode = PHY_INTERFACE_MODE_QSGMII;
+ break;
+ case DPMAC_ETH_IF_SGMII:
+ *if_mode = PHY_INTERFACE_MODE_SGMII;
+ break;
+ case DPMAC_ETH_IF_XFI:
+ *if_mode = PHY_INTERFACE_MODE_10GBASER;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum dpmac_eth_if dpmac_eth_if_mode(phy_interface_t if_mode)
+{
+ switch (if_mode) {
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ return DPMAC_ETH_IF_RGMII;
+ case PHY_INTERFACE_MODE_USXGMII:
+ return DPMAC_ETH_IF_USXGMII;
+ case PHY_INTERFACE_MODE_QSGMII:
+ return DPMAC_ETH_IF_QSGMII;
+ case PHY_INTERFACE_MODE_SGMII:
+ return DPMAC_ETH_IF_SGMII;
+ case PHY_INTERFACE_MODE_10GBASER:
+ return DPMAC_ETH_IF_XFI;
+ case PHY_INTERFACE_MODE_1000BASEX:
+ return DPMAC_ETH_IF_1000BASEX;
+ default:
+ return DPMAC_ETH_IF_MII;
+ }
+}
+
+static struct fwnode_handle *dpaa2_mac_get_node(struct device *dev,
+ u16 dpmac_id)
+{
+ struct fwnode_handle *fwnode, *parent = NULL, *child = NULL;
+ struct device_node *dpmacs = NULL;
+ int err;
+ u32 id;
+
+ fwnode = dev_fwnode(dev->parent);
+ if (is_of_node(fwnode)) {
+ dpmacs = of_find_node_by_name(NULL, "dpmacs");
+ if (!dpmacs)
+ return NULL;
+ parent = of_fwnode_handle(dpmacs);
+ } else if (is_acpi_node(fwnode)) {
+ parent = fwnode;
+ } else {
+ /* The root dprc device didn't yet get to finalize it's probe,
+ * thus the fwnode field is not yet set. Defer probe if we are
+ * facing this situation.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ fwnode_for_each_child_node(parent, child) {
+ err = -EINVAL;
+ if (is_acpi_device_node(child))
+ err = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), &id);
+ else if (is_of_node(child))
+ err = of_property_read_u32(to_of_node(child), "reg", &id);
+ if (err)
+ continue;
+
+ if (id == dpmac_id) {
+ of_node_put(dpmacs);
+ return child;
+ }
+ }
+ of_node_put(dpmacs);
+ return NULL;
+}
+
+static int dpaa2_mac_get_if_mode(struct fwnode_handle *dpmac_node,
+ struct dpmac_attr attr)
+{
+ phy_interface_t if_mode;
+ int err;
+
+ err = fwnode_get_phy_mode(dpmac_node);
+ if (err > 0)
+ return err;
+
+ err = phy_mode(attr.eth_if, &if_mode);
+ if (!err)
+ return if_mode;
+
+ return err;
+}
+
+static struct phylink_pcs *dpaa2_mac_select_pcs(struct phylink_config *config,
+ phy_interface_t interface)
+{
+ struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config);
+
+ return mac->pcs;
+}
+
+static void dpaa2_mac_config(struct phylink_config *config, unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config);
+ struct dpmac_link_state *dpmac_state = &mac->state;
+ int err;
+
+ if (state->an_enabled)
+ dpmac_state->options |= DPMAC_LINK_OPT_AUTONEG;
+ else
+ dpmac_state->options &= ~DPMAC_LINK_OPT_AUTONEG;
+
+ err = dpmac_set_link_state(mac->mc_io, 0,
+ mac->mc_dev->mc_handle, dpmac_state);
+ if (err)
+ netdev_err(mac->net_dev, "%s: dpmac_set_link_state() = %d\n",
+ __func__, err);
+
+ if (!mac->serdes_phy)
+ return;
+
+ /* This happens only if we support changing of protocol at runtime */
+ err = dpmac_set_protocol(mac->mc_io, 0, mac->mc_dev->mc_handle,
+ dpmac_eth_if_mode(state->interface));
+ if (err)
+ netdev_err(mac->net_dev, "dpmac_set_protocol() = %d\n", err);
+
+ err = phy_set_mode_ext(mac->serdes_phy, PHY_MODE_ETHERNET, state->interface);
+ if (err)
+ netdev_err(mac->net_dev, "phy_set_mode_ext() = %d\n", err);
+}
+
+static void dpaa2_mac_link_up(struct phylink_config *config,
+ struct phy_device *phy,
+ unsigned int mode, phy_interface_t interface,
+ int speed, int duplex,
+ bool tx_pause, bool rx_pause)
+{
+ struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config);
+ struct dpmac_link_state *dpmac_state = &mac->state;
+ int err;
+
+ dpmac_state->up = 1;
+
+ dpmac_state->rate = speed;
+
+ if (duplex == DUPLEX_HALF)
+ dpmac_state->options |= DPMAC_LINK_OPT_HALF_DUPLEX;
+ else if (duplex == DUPLEX_FULL)
+ dpmac_state->options &= ~DPMAC_LINK_OPT_HALF_DUPLEX;
+
+ if (rx_pause)
+ dpmac_state->options |= DPMAC_LINK_OPT_PAUSE;
+ else
+ dpmac_state->options &= ~DPMAC_LINK_OPT_PAUSE;
+
+ if (rx_pause ^ tx_pause)
+ dpmac_state->options |= DPMAC_LINK_OPT_ASYM_PAUSE;
+ else
+ dpmac_state->options &= ~DPMAC_LINK_OPT_ASYM_PAUSE;
+
+ err = dpmac_set_link_state(mac->mc_io, 0,
+ mac->mc_dev->mc_handle, dpmac_state);
+ if (err)
+ netdev_err(mac->net_dev, "%s: dpmac_set_link_state() = %d\n",
+ __func__, err);
+}
+
+static void dpaa2_mac_link_down(struct phylink_config *config,
+ unsigned int mode,
+ phy_interface_t interface)
+{
+ struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config);
+ struct dpmac_link_state *dpmac_state = &mac->state;
+ int err;
+
+ dpmac_state->up = 0;
+ err = dpmac_set_link_state(mac->mc_io, 0,
+ mac->mc_dev->mc_handle, dpmac_state);
+ if (err)
+ netdev_err(mac->net_dev, "dpmac_set_link_state() = %d\n", err);
+}
+
+static const struct phylink_mac_ops dpaa2_mac_phylink_ops = {
+ .validate = phylink_generic_validate,
+ .mac_select_pcs = dpaa2_mac_select_pcs,
+ .mac_config = dpaa2_mac_config,
+ .mac_link_up = dpaa2_mac_link_up,
+ .mac_link_down = dpaa2_mac_link_down,
+};
+
+static int dpaa2_pcs_create(struct dpaa2_mac *mac,
+ struct fwnode_handle *dpmac_node,
+ int id)
+{
+ struct mdio_device *mdiodev;
+ struct fwnode_handle *node;
+
+ node = fwnode_find_reference(dpmac_node, "pcs-handle", 0);
+ if (IS_ERR(node)) {
+ /* do not error out on old DTS files */
+ netdev_warn(mac->net_dev, "pcs-handle node not found\n");
+ return 0;
+ }
+
+ if (!fwnode_device_is_available(node)) {
+ netdev_err(mac->net_dev, "pcs-handle node not available\n");
+ fwnode_handle_put(node);
+ return -ENODEV;
+ }
+
+ mdiodev = fwnode_mdio_find_device(node);
+ fwnode_handle_put(node);
+ if (!mdiodev)
+ return -EPROBE_DEFER;
+
+ mac->pcs = lynx_pcs_create(mdiodev);
+ if (!mac->pcs) {
+ netdev_err(mac->net_dev, "lynx_pcs_create() failed\n");
+ put_device(&mdiodev->dev);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void dpaa2_pcs_destroy(struct dpaa2_mac *mac)
+{
+ struct phylink_pcs *phylink_pcs = mac->pcs;
+
+ if (phylink_pcs) {
+ struct mdio_device *mdio = lynx_get_mdio_device(phylink_pcs);
+ struct device *dev = &mdio->dev;
+
+ lynx_pcs_destroy(phylink_pcs);
+ put_device(dev);
+ mac->pcs = NULL;
+ }
+}
+
+static void dpaa2_mac_set_supported_interfaces(struct dpaa2_mac *mac)
+{
+ int intf, err;
+
+ /* We support the current interface mode, and if we have a PCS
+ * similar interface modes that do not require the SerDes lane to be
+ * reconfigured.
+ */
+ __set_bit(mac->if_mode, mac->phylink_config.supported_interfaces);
+ if (mac->pcs) {
+ switch (mac->if_mode) {
+ case PHY_INTERFACE_MODE_1000BASEX:
+ case PHY_INTERFACE_MODE_SGMII:
+ __set_bit(PHY_INTERFACE_MODE_1000BASEX,
+ mac->phylink_config.supported_interfaces);
+ __set_bit(PHY_INTERFACE_MODE_SGMII,
+ mac->phylink_config.supported_interfaces);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (!mac->serdes_phy)
+ return;
+
+ /* In case we have access to the SerDes phy/lane, then ask the SerDes
+ * driver what interfaces are supported based on the current PLL
+ * configuration.
+ */
+ for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) {
+ if (intf == PHY_INTERFACE_MODE_NA)
+ continue;
+
+ err = phy_validate(mac->serdes_phy, PHY_MODE_ETHERNET, intf, NULL);
+ if (err)
+ continue;
+
+ __set_bit(intf, mac->phylink_config.supported_interfaces);
+ }
+}
+
+void dpaa2_mac_start(struct dpaa2_mac *mac)
+{
+ if (mac->serdes_phy)
+ phy_power_on(mac->serdes_phy);
+}
+
+void dpaa2_mac_stop(struct dpaa2_mac *mac)
+{
+ if (mac->serdes_phy)
+ phy_power_off(mac->serdes_phy);
+}
+
+int dpaa2_mac_connect(struct dpaa2_mac *mac)
+{
+ struct net_device *net_dev = mac->net_dev;
+ struct fwnode_handle *dpmac_node;
+ struct phy *serdes_phy = NULL;
+ struct phylink *phylink;
+ int err;
+
+ mac->if_link_type = mac->attr.link_type;
+
+ dpmac_node = mac->fw_node;
+ if (!dpmac_node) {
+ netdev_err(net_dev, "No dpmac@%d node found.\n", mac->attr.id);
+ return -ENODEV;
+ }
+
+ err = dpaa2_mac_get_if_mode(dpmac_node, mac->attr);
+ if (err < 0)
+ return -EINVAL;
+ mac->if_mode = err;
+
+ if (mac->features & DPAA2_MAC_FEATURE_PROTOCOL_CHANGE &&
+ !phy_interface_mode_is_rgmii(mac->if_mode) &&
+ is_of_node(dpmac_node)) {
+ serdes_phy = of_phy_get(to_of_node(dpmac_node), NULL);
+
+ if (serdes_phy == ERR_PTR(-ENODEV))
+ serdes_phy = NULL;
+ else if (IS_ERR(serdes_phy))
+ return PTR_ERR(serdes_phy);
+ else
+ phy_init(serdes_phy);
+ }
+ mac->serdes_phy = serdes_phy;
+
+ /* The MAC does not have the capability to add RGMII delays so
+ * error out if the interface mode requests them and there is no PHY
+ * to act upon them
+ */
+ if (of_phy_is_fixed_link(to_of_node(dpmac_node)) &&
+ (mac->if_mode == PHY_INTERFACE_MODE_RGMII_ID ||
+ mac->if_mode == PHY_INTERFACE_MODE_RGMII_RXID ||
+ mac->if_mode == PHY_INTERFACE_MODE_RGMII_TXID)) {
+ netdev_err(net_dev, "RGMII delay not supported\n");
+ return -EINVAL;
+ }
+
+ if ((mac->attr.link_type == DPMAC_LINK_TYPE_PHY &&
+ mac->attr.eth_if != DPMAC_ETH_IF_RGMII) ||
+ mac->attr.link_type == DPMAC_LINK_TYPE_BACKPLANE) {
+ err = dpaa2_pcs_create(mac, dpmac_node, mac->attr.id);
+ if (err)
+ return err;
+ }
+
+ memset(&mac->phylink_config, 0, sizeof(mac->phylink_config));
+ mac->phylink_config.dev = &net_dev->dev;
+ mac->phylink_config.type = PHYLINK_NETDEV;
+
+ mac->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE |
+ MAC_10FD | MAC_100FD | MAC_1000FD | MAC_2500FD | MAC_5000FD |
+ MAC_10000FD;
+
+ dpaa2_mac_set_supported_interfaces(mac);
+
+ phylink = phylink_create(&mac->phylink_config,
+ dpmac_node, mac->if_mode,
+ &dpaa2_mac_phylink_ops);
+ if (IS_ERR(phylink)) {
+ err = PTR_ERR(phylink);
+ goto err_pcs_destroy;
+ }
+ mac->phylink = phylink;
+
+ err = phylink_fwnode_phy_connect(mac->phylink, dpmac_node, 0);
+ if (err) {
+ netdev_err(net_dev, "phylink_fwnode_phy_connect() = %d\n", err);
+ goto err_phylink_destroy;
+ }
+
+ return 0;
+
+err_phylink_destroy:
+ phylink_destroy(mac->phylink);
+err_pcs_destroy:
+ dpaa2_pcs_destroy(mac);
+
+ return err;
+}
+
+void dpaa2_mac_disconnect(struct dpaa2_mac *mac)
+{
+ if (!mac->phylink)
+ return;
+
+ phylink_disconnect_phy(mac->phylink);
+ phylink_destroy(mac->phylink);
+ dpaa2_pcs_destroy(mac);
+ of_phy_put(mac->serdes_phy);
+ mac->serdes_phy = NULL;
+}
+
+int dpaa2_mac_open(struct dpaa2_mac *mac)
+{
+ struct fsl_mc_device *dpmac_dev = mac->mc_dev;
+ struct net_device *net_dev = mac->net_dev;
+ struct fwnode_handle *fw_node;
+ int err;
+
+ err = dpmac_open(mac->mc_io, 0, dpmac_dev->obj_desc.id,
+ &dpmac_dev->mc_handle);
+ if (err || !dpmac_dev->mc_handle) {
+ netdev_err(net_dev, "dpmac_open() = %d\n", err);
+ return -ENODEV;
+ }
+
+ err = dpmac_get_attributes(mac->mc_io, 0, dpmac_dev->mc_handle,
+ &mac->attr);
+ if (err) {
+ netdev_err(net_dev, "dpmac_get_attributes() = %d\n", err);
+ goto err_close_dpmac;
+ }
+
+ err = dpmac_get_api_version(mac->mc_io, 0, &mac->ver_major, &mac->ver_minor);
+ if (err) {
+ netdev_err(net_dev, "dpmac_get_api_version() = %d\n", err);
+ goto err_close_dpmac;
+ }
+
+ dpaa2_mac_detect_features(mac);
+
+ /* Find the device node representing the MAC device and link the device
+ * behind the associated netdev to it.
+ */
+ fw_node = dpaa2_mac_get_node(&mac->mc_dev->dev, mac->attr.id);
+ if (IS_ERR(fw_node)) {
+ err = PTR_ERR(fw_node);
+ goto err_close_dpmac;
+ }
+
+ mac->fw_node = fw_node;
+ net_dev->dev.of_node = to_of_node(mac->fw_node);
+
+ return 0;
+
+err_close_dpmac:
+ dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle);
+ return err;
+}
+
+void dpaa2_mac_close(struct dpaa2_mac *mac)
+{
+ struct fsl_mc_device *dpmac_dev = mac->mc_dev;
+
+ dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle);
+ if (mac->fw_node)
+ fwnode_handle_put(mac->fw_node);
+}
+
+static char dpaa2_mac_ethtool_stats[][ETH_GSTRING_LEN] = {
+ [DPMAC_CNT_ING_ALL_FRAME] = "[mac] rx all frames",
+ [DPMAC_CNT_ING_GOOD_FRAME] = "[mac] rx frames ok",
+ [DPMAC_CNT_ING_ERR_FRAME] = "[mac] rx frame errors",
+ [DPMAC_CNT_ING_FRAME_DISCARD] = "[mac] rx frame discards",
+ [DPMAC_CNT_ING_UCAST_FRAME] = "[mac] rx u-cast",
+ [DPMAC_CNT_ING_BCAST_FRAME] = "[mac] rx b-cast",
+ [DPMAC_CNT_ING_MCAST_FRAME] = "[mac] rx m-cast",
+ [DPMAC_CNT_ING_FRAME_64] = "[mac] rx 64 bytes",
+ [DPMAC_CNT_ING_FRAME_127] = "[mac] rx 65-127 bytes",
+ [DPMAC_CNT_ING_FRAME_255] = "[mac] rx 128-255 bytes",
+ [DPMAC_CNT_ING_FRAME_511] = "[mac] rx 256-511 bytes",
+ [DPMAC_CNT_ING_FRAME_1023] = "[mac] rx 512-1023 bytes",
+ [DPMAC_CNT_ING_FRAME_1518] = "[mac] rx 1024-1518 bytes",
+ [DPMAC_CNT_ING_FRAME_1519_MAX] = "[mac] rx 1519-max bytes",
+ [DPMAC_CNT_ING_FRAG] = "[mac] rx frags",
+ [DPMAC_CNT_ING_JABBER] = "[mac] rx jabber",
+ [DPMAC_CNT_ING_ALIGN_ERR] = "[mac] rx align errors",
+ [DPMAC_CNT_ING_OVERSIZED] = "[mac] rx oversized",
+ [DPMAC_CNT_ING_VALID_PAUSE_FRAME] = "[mac] rx pause",
+ [DPMAC_CNT_ING_BYTE] = "[mac] rx bytes",
+ [DPMAC_CNT_EGR_GOOD_FRAME] = "[mac] tx frames ok",
+ [DPMAC_CNT_EGR_UCAST_FRAME] = "[mac] tx u-cast",
+ [DPMAC_CNT_EGR_MCAST_FRAME] = "[mac] tx m-cast",
+ [DPMAC_CNT_EGR_BCAST_FRAME] = "[mac] tx b-cast",
+ [DPMAC_CNT_EGR_ERR_FRAME] = "[mac] tx frame errors",
+ [DPMAC_CNT_EGR_UNDERSIZED] = "[mac] tx undersized",
+ [DPMAC_CNT_EGR_VALID_PAUSE_FRAME] = "[mac] tx b-pause",
+ [DPMAC_CNT_EGR_BYTE] = "[mac] tx bytes",
+};
+
+#define DPAA2_MAC_NUM_STATS ARRAY_SIZE(dpaa2_mac_ethtool_stats)
+
+int dpaa2_mac_get_sset_count(void)
+{
+ return DPAA2_MAC_NUM_STATS;
+}
+
+void dpaa2_mac_get_strings(u8 *data)
+{
+ u8 *p = data;
+ int i;
+
+ for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) {
+ strscpy(p, dpaa2_mac_ethtool_stats[i], ETH_GSTRING_LEN);
+ p += ETH_GSTRING_LEN;
+ }
+}
+
+void dpaa2_mac_get_ethtool_stats(struct dpaa2_mac *mac, u64 *data)
+{
+ struct fsl_mc_device *dpmac_dev = mac->mc_dev;
+ int i, err;
+ u64 value;
+
+ for (i = 0; i < DPAA2_MAC_NUM_STATS; i++) {
+ err = dpmac_get_counter(mac->mc_io, 0, dpmac_dev->mc_handle,
+ i, &value);
+ if (err) {
+ netdev_err_once(mac->net_dev,
+ "dpmac_get_counter error %d\n", err);
+ *(data + i) = U64_MAX;
+ continue;
+ }
+ *(data + i) = value;
+ }
+}