1 files changed, 475 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..828c177df
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/* Copyright 2019 NXP */
+
+#include "dpaa2-eth.h"
+#include "dpaa2-mac.h"
+
+#define phylink_to_dpaa2_mac(config) \
+	container_of((config), struct dpaa2_mac, phylink_config)
+
+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;
+}
+
+/* Caller must call of_node_put on the returned value */
+static struct device_node *dpaa2_mac_get_node(u16 dpmac_id)
+{
+	struct device_node *dpmacs, *dpmac = NULL;
+	u32 id;
+	int err;
+
+	dpmacs = of_find_node_by_name(NULL, "dpmacs");
+	if (!dpmacs)
+		return NULL;
+
+	while ((dpmac = of_get_next_child(dpmacs, dpmac)) != NULL) {
+		err = of_property_read_u32(dpmac, "reg", &id);
+		if (err)
+			continue;
+		if (id == dpmac_id)
+			break;
+	}
+
+	of_node_put(dpmacs);
+
+	return dpmac;
+}
+
+static int dpaa2_mac_get_if_mode(struct device_node *node,
+				 struct dpmac_attr attr)
+{
+	phy_interface_t if_mode;
+	int err;
+
+	err = of_get_phy_mode(node, &if_mode);
+	if (!err)
+		return if_mode;
+
+	err = phy_mode(attr.eth_if, &if_mode);
+	if (!err)
+		return if_mode;
+
+	return err;
+}
+
+static bool dpaa2_mac_phy_mode_mismatch(struct dpaa2_mac *mac,
+					phy_interface_t interface)
+{
+	switch (interface) {
+	case PHY_INTERFACE_MODE_10GBASER:
+	case PHY_INTERFACE_MODE_USXGMII:
+	case PHY_INTERFACE_MODE_QSGMII:
+	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
+		return (interface != mac->if_mode);
+	default:
+		return true;
+	}
+}
+
+static void dpaa2_mac_validate(struct phylink_config *config,
+			       unsigned long *supported,
+			       struct phylink_link_state *state)
+{
+	struct dpaa2_mac *mac = phylink_to_dpaa2_mac(config);
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+
+	if (state->interface != PHY_INTERFACE_MODE_NA &&
+	    dpaa2_mac_phy_mode_mismatch(mac, state->interface)) {
+		goto empty_set;
+	}
+
+	phylink_set_port_modes(mask);
+	phylink_set(mask, Autoneg);
+	phylink_set(mask, Pause);
+	phylink_set(mask, Asym_Pause);
+
+	switch (state->interface) {
+	case PHY_INTERFACE_MODE_NA:
+	case PHY_INTERFACE_MODE_10GBASER:
+	case PHY_INTERFACE_MODE_USXGMII:
+		phylink_set(mask, 10000baseT_Full);
+		if (state->interface == PHY_INTERFACE_MODE_10GBASER)
+			break;
+		phylink_set(mask, 5000baseT_Full);
+		phylink_set(mask, 2500baseT_Full);
+		fallthrough;
+	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_QSGMII:
+	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
+		phylink_set(mask, 10baseT_Full);
+		phylink_set(mask, 100baseT_Full);
+		phylink_set(mask, 1000baseT_Full);
+		break;
+	default:
+		goto empty_set;
+	}
+
+	linkmode_and(supported, supported, mask);
+	linkmode_and(state->advertising, state->advertising, mask);
+
+	return;
+
+empty_set:
+	linkmode_zero(supported);
+}
+
+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);
+}
+
+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;
+
+	if (mac->if_link_type == DPMAC_LINK_TYPE_PHY) {
+		/* If the DPMAC is configured for PHY mode, we need
+		 * to pass the link parameters to the MC firmware.
+		 */
+		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;
+
+		/* This is lossy; the firmware really should take the pause
+		 * enablement status rather than pause/asym pause status.
+		 */
+		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 = dpaa2_mac_validate,
+	.mac_config = dpaa2_mac_config,
+	.mac_link_up = dpaa2_mac_link_up,
+	.mac_link_down = dpaa2_mac_link_down,
+};
+
+bool dpaa2_mac_is_type_fixed(struct fsl_mc_device *dpmac_dev,
+			     struct fsl_mc_io *mc_io)
+{
+	struct dpmac_attr attr;
+	bool fixed = false;
+	u16 mc_handle = 0;
+	int err;
+
+	err = dpmac_open(mc_io, 0, dpmac_dev->obj_desc.id,
+			 &mc_handle);
+	if (err || !mc_handle)
+		return false;
+
+	err = dpmac_get_attributes(mc_io, 0, mc_handle, &attr);
+	if (err)
+		goto out;
+
+	if (attr.link_type == DPMAC_LINK_TYPE_FIXED)
+		fixed = true;
+
+out:
+	dpmac_close(mc_io, 0, mc_handle);
+
+	return fixed;
+}
+
+static int dpaa2_pcs_create(struct dpaa2_mac *mac,
+			    struct device_node *dpmac_node, int id)
+{
+	struct mdio_device *mdiodev;
+	struct device_node *node;
+
+	node = of_parse_phandle(dpmac_node, "pcs-handle", 0);
+	if (!node) {
+		/* do not error out on old DTS files */
+		netdev_warn(mac->net_dev, "pcs-handle node not found\n");
+		return 0;
+	}
+
+	if (!of_device_is_available(node)) {
+		netdev_err(mac->net_dev, "pcs-handle node not available\n");
+		of_node_put(node);
+		return -ENODEV;
+	}
+
+	mdiodev = of_mdio_find_device(node);
+	of_node_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 lynx_pcs *pcs = mac->pcs;
+
+	if (pcs) {
+		struct device *dev = &pcs->mdio->dev;
+		lynx_pcs_destroy(pcs);
+		put_device(dev);
+		mac->pcs = NULL;
+	}
+}
+
+int dpaa2_mac_connect(struct dpaa2_mac *mac)
+{
+	struct fsl_mc_device *dpmac_dev = mac->mc_dev;
+	struct net_device *net_dev = mac->net_dev;
+	struct device_node *dpmac_node;
+	struct phylink *phylink;
+	struct dpmac_attr attr;
+	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, &attr);
+	if (err) {
+		netdev_err(net_dev, "dpmac_get_attributes() = %d\n", err);
+		goto err_close_dpmac;
+	}
+
+	mac->if_link_type = attr.link_type;
+
+	dpmac_node = dpaa2_mac_get_node(attr.id);
+	if (!dpmac_node) {
+		netdev_err(net_dev, "No dpmac@%d node found.\n", attr.id);
+		err = -ENODEV;
+		goto err_close_dpmac;
+	}
+
+	err = dpaa2_mac_get_if_mode(dpmac_node, attr);
+	if (err < 0) {
+		err = -EINVAL;
+		goto err_put_node;
+	}
+	mac->if_mode = err;
+
+	/* 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(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");
+		err = -EINVAL;
+		goto err_put_node;
+	}
+
+	if (attr.link_type == DPMAC_LINK_TYPE_PHY &&
+	    attr.eth_if != DPMAC_ETH_IF_RGMII) {
+		err = dpaa2_pcs_create(mac, dpmac_node, attr.id);
+		if (err)
+			goto err_put_node;
+	}
+
+	mac->phylink_config.dev = &net_dev->dev;
+	mac->phylink_config.type = PHYLINK_NETDEV;
+
+	phylink = phylink_create(&mac->phylink_config,
+				 of_fwnode_handle(dpmac_node), mac->if_mode,
+				 &dpaa2_mac_phylink_ops);
+	if (IS_ERR(phylink)) {
+		err = PTR_ERR(phylink);
+		goto err_pcs_destroy;
+	}
+	mac->phylink = phylink;
+
+	if (mac->pcs)
+		phylink_set_pcs(mac->phylink, &mac->pcs->pcs);
+
+	err = phylink_of_phy_connect(mac->phylink, dpmac_node, 0);
+	if (err) {
+		netdev_err(net_dev, "phylink_of_phy_connect() = %d\n", err);
+		goto err_phylink_destroy;
+	}
+
+	of_node_put(dpmac_node);
+
+	return 0;
+
+err_phylink_destroy:
+	phylink_destroy(mac->phylink);
+err_pcs_destroy:
+	dpaa2_pcs_destroy(mac);
+err_put_node:
+	of_node_put(dpmac_node);
+err_close_dpmac:
+	dpmac_close(mac->mc_io, 0, dpmac_dev->mc_handle);
+	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);
+
+	dpmac_close(mac->mc_io, 0, mac->mc_dev->mc_handle);
+}
+
+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++) {
+		strlcpy(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;
+	}
+}