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alistair23-linux/drivers/staging/fsl-dpaa2/mac/mac.c

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/* Copyright 2015 Freescale Semiconductor Inc.
* Copyright 2018-2019 NXP
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/msi.h>
#include <linux/rtnetlink.h>
#include <linux/if_vlan.h>
#include <uapi/linux/if_bridge.h>
#include <net/netlink.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/fsl/mc.h>
#include "dpmac.h"
#include "dpmac-cmd.h"
struct dpaa2_mac_priv {
struct net_device *netdev;
struct fsl_mc_device *mc_dev;
struct dpmac_attr attr;
struct dpmac_link_state old_state;
u16 dpmac_ver_major;
u16 dpmac_ver_minor;
};
/* TODO: fix the 10G modes, mapping can't be right:
* XGMII is paralel
* XAUI is serial, using 8b/10b encoding
* XFI is also serial but using 64b/66b encoding
* they can't all map to XGMII...
*
* This must be kept in sync with enum dpmac_eth_if.
*/
static phy_interface_t dpaa2_mac_iface_mode[] = {
PHY_INTERFACE_MODE_MII, /* DPMAC_ETH_IF_MII */
PHY_INTERFACE_MODE_RMII, /* DPMAC_ETH_IF_RMII */
PHY_INTERFACE_MODE_SMII, /* DPMAC_ETH_IF_SMII */
PHY_INTERFACE_MODE_GMII, /* DPMAC_ETH_IF_GMII */
PHY_INTERFACE_MODE_RGMII, /* DPMAC_ETH_IF_RGMII */
PHY_INTERFACE_MODE_SGMII, /* DPMAC_ETH_IF_SGMII */
PHY_INTERFACE_MODE_QSGMII, /* DPMAC_ETH_IF_QSGMII */
PHY_INTERFACE_MODE_XAUI, /* DPMAC_ETH_IF_XAUI */
PHY_INTERFACE_MODE_XGMII, /* DPMAC_ETH_IF_XFI */
PHY_INTERFACE_MODE_XGMII, /* DPMAC_ETH_IF_CAUI */
PHY_INTERFACE_MODE_1000BASEX, /* DPMAC_ETH_IF_1000BASEX */
PHY_INTERFACE_MODE_USXGMII, /* DPMAC_ETH_IF_USXGMII */
};
static int cmp_dpmac_ver(struct dpaa2_mac_priv *priv,
u16 ver_major, u16 ver_minor)
{
if (priv->dpmac_ver_major == ver_major)
return priv->dpmac_ver_minor - ver_minor;
return priv->dpmac_ver_major - ver_major;
}
#define DPMAC_LINK_AUTONEG_VER_MAJOR 4
#define DPMAC_LINK_AUTONEG_VER_MINOR 3
struct dpaa2_mac_link_mode_map {
u64 dpmac_lm;
u64 ethtool_lm;
};
static const struct dpaa2_mac_link_mode_map dpaa2_mac_lm_map[] = {
{DPMAC_ADVERTISED_10BASET_FULL, ETHTOOL_LINK_MODE_10baseT_Full_BIT},
{DPMAC_ADVERTISED_100BASET_FULL, ETHTOOL_LINK_MODE_100baseT_Full_BIT},
{DPMAC_ADVERTISED_1000BASET_FULL, ETHTOOL_LINK_MODE_1000baseT_Full_BIT},
{DPMAC_ADVERTISED_10000BASET_FULL, ETHTOOL_LINK_MODE_10000baseT_Full_BIT},
{DPMAC_ADVERTISED_2500BASEX_FULL, ETHTOOL_LINK_MODE_2500baseT_Full_BIT},
{DPMAC_ADVERTISED_AUTONEG, ETHTOOL_LINK_MODE_Autoneg_BIT},
};
static void link_mode_dpmac2phydev(u64 dpmac_lm, unsigned long *phydev_lm)
{
int i;
for (i = 0; i < ARRAY_SIZE(dpaa2_mac_lm_map); i++) {
if (dpmac_lm & dpaa2_mac_lm_map[i].dpmac_lm)
linkmode_set_bit(dpaa2_mac_lm_map[i].ethtool_lm, phydev_lm);
}
}
static void link_mode_phydev2dpmac(unsigned long *phydev_lm, u64 *dpni_lm)
{
int i;
for (i = 0; i < ARRAY_SIZE(dpaa2_mac_lm_map); i++) {
if (linkmode_test_bit(dpaa2_mac_lm_map[i].ethtool_lm, phydev_lm))
*dpni_lm |= dpaa2_mac_lm_map[i].dpmac_lm;
}
}
static void dpaa2_mac_link_changed(struct net_device *netdev)
{
struct phy_device *phydev;
struct dpmac_link_state state = { 0 };
struct dpaa2_mac_priv *priv = netdev_priv(netdev);
int err;
/* the PHY just notified us of link state change */
phydev = netdev->phydev;
state.up = !!phydev->link;
if (phydev->link) {
state.rate = phydev->speed;
if (!phydev->duplex)
state.options |= DPMAC_LINK_OPT_HALF_DUPLEX;
if (phydev->autoneg)
state.options |= DPMAC_LINK_OPT_AUTONEG;
if (phydev->pause && linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->advertising))
state.options |= DPMAC_LINK_OPT_PAUSE;
if (phydev->pause && linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->advertising))
state.options |= DPMAC_LINK_OPT_ASYM_PAUSE;
netif_carrier_on(netdev);
} else {
netif_carrier_off(netdev);
}
/* Call the dpmac_set_link_state() only if there is a change in the
* link configuration
*/
if (priv->old_state.up == state.up &&
priv->old_state.rate == state.rate &&
priv->old_state.options == state.options)
return;
priv->old_state = state;
phy_print_status(phydev);
if (cmp_dpmac_ver(priv, DPMAC_LINK_AUTONEG_VER_MAJOR,
DPMAC_LINK_AUTONEG_VER_MINOR) < 0) {
err = dpmac_set_link_state(priv->mc_dev->mc_io, 0,
priv->mc_dev->mc_handle, &state);
} else {
link_mode_phydev2dpmac(phydev->supported, &state.supported);
link_mode_phydev2dpmac(phydev->advertising, &state.advertising);
state.state_valid = 1;
err = dpmac_set_link_state_v2(priv->mc_dev->mc_io, 0,
priv->mc_dev->mc_handle, &state);
}
if (unlikely(err))
dev_err(&priv->mc_dev->dev, "dpmac_set_link_state: %d\n", err);
}
#ifdef CONFIG_FSL_DPAA2_MAC_NETDEVS
static int dpaa2_mac_open(struct net_device *netdev)
{
/* start PHY state machine */
phy_start(netdev->phydev);
return 0;
}
#endif
static int dpaa2_mac_stop(struct net_device *netdev)
{
if (!netdev->phydev)
goto done;
/* stop PHY state machine */
phy_stop(netdev->phydev);
/* signal link down to firmware */
netdev->phydev->link = 0;
dpaa2_mac_link_changed(netdev);
done:
return 0;
}
#ifdef CONFIG_FSL_DPAA2_MAC_NETDEVS
static netdev_tx_t dpaa2_mac_drop_frame(struct sk_buff *skb,
struct net_device *dev)
{
/* we don't support I/O for now, drop the frame */
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
static void dpaa2_mac_get_drvinfo(struct net_device *net_dev,
struct ethtool_drvinfo *drvinfo)
{
struct dpaa2_mac_priv *priv = netdev_priv(net_dev);
strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
"%u.%u", priv->dpmac_ver_major, priv->dpmac_ver_minor);
strlcpy(drvinfo->bus_info, dev_name(net_dev->dev.parent->parent),
sizeof(drvinfo->bus_info));
}
static int dpaa2_mac_get_link_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings *ks)
{
phy_ethtool_ksettings_get(netdev->phydev, ks);
return 0;
}
static int dpaa2_mac_set_link_ksettings(struct net_device *netdev,
const struct ethtool_link_ksettings *ks)
{
return phy_ethtool_ksettings_set(netdev->phydev, ks);
}
static void dpaa2_mac_get_stats(struct net_device *netdev,
struct rtnl_link_stats64 *storage)
{
struct dpaa2_mac_priv *priv = netdev_priv(netdev);
u64 tmp;
int err;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_EGR_MCAST_FRAME,
&storage->tx_packets);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_EGR_BCAST_FRAME, &tmp);
if (err)
goto error;
storage->tx_packets += tmp;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_EGR_UCAST_FRAME, &tmp);
if (err)
goto error;
storage->tx_packets += tmp;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_EGR_UNDERSIZED, &storage->tx_dropped);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_EGR_BYTE, &storage->tx_bytes);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_EGR_ERR_FRAME, &storage->tx_errors);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_ING_ALL_FRAME, &storage->rx_packets);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_ING_MCAST_FRAME, &storage->multicast);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_ING_FRAME_DISCARD,
&storage->rx_dropped);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_ING_ALIGN_ERR, &storage->rx_errors);
if (err)
goto error;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_ING_OVERSIZED, &tmp);
if (err)
goto error;
storage->rx_errors += tmp;
err = dpmac_get_counter(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle,
DPMAC_CNT_ING_BYTE, &storage->rx_bytes);
if (err)
goto error;
return;
error:
netdev_err(netdev, "dpmac_get_counter err %d\n", err);
}
static struct {
enum dpmac_counter id;
char name[ETH_GSTRING_LEN];
} dpaa2_mac_counters[] = {
{DPMAC_CNT_ING_ALL_FRAME, "rx all frames"},
{DPMAC_CNT_ING_GOOD_FRAME, "rx frames ok"},
{DPMAC_CNT_ING_ERR_FRAME, "rx frame errors"},
{DPMAC_CNT_ING_FRAME_DISCARD, "rx frame discards"},
{DPMAC_CNT_ING_UCAST_FRAME, "rx u-cast"},
{DPMAC_CNT_ING_BCAST_FRAME, "rx b-cast"},
{DPMAC_CNT_ING_MCAST_FRAME, "rx m-cast"},
{DPMAC_CNT_ING_FRAME_64, "rx 64 bytes"},
{DPMAC_CNT_ING_FRAME_127, "rx 65-127 bytes"},
{DPMAC_CNT_ING_FRAME_255, "rx 128-255 bytes"},
{DPMAC_CNT_ING_FRAME_511, "rx 256-511 bytes"},
{DPMAC_CNT_ING_FRAME_1023, "rx 512-1023 bytes"},
{DPMAC_CNT_ING_FRAME_1518, "rx 1024-1518 bytes"},
{DPMAC_CNT_ING_FRAME_1519_MAX, "rx 1519-max bytes"},
{DPMAC_CNT_ING_FRAG, "rx frags"},
{DPMAC_CNT_ING_JABBER, "rx jabber"},
{DPMAC_CNT_ING_ALIGN_ERR, "rx align errors"},
{DPMAC_CNT_ING_OVERSIZED, "rx oversized"},
{DPMAC_CNT_ING_VALID_PAUSE_FRAME, "rx pause"},
{DPMAC_CNT_ING_BYTE, "rx bytes"},
{DPMAC_CNT_ENG_GOOD_FRAME, "tx frames ok"},
{DPMAC_CNT_EGR_UCAST_FRAME, "tx u-cast"},
{DPMAC_CNT_EGR_MCAST_FRAME, "tx m-cast"},
{DPMAC_CNT_EGR_BCAST_FRAME, "tx b-cast"},
{DPMAC_CNT_EGR_ERR_FRAME, "tx frame errors"},
{DPMAC_CNT_EGR_UNDERSIZED, "tx undersized"},
{DPMAC_CNT_EGR_VALID_PAUSE_FRAME, "tx b-pause"},
{DPMAC_CNT_EGR_BYTE, "tx bytes"},
};
static void dpaa2_mac_get_strings(struct net_device *netdev,
u32 stringset, u8 *data)
{
int i;
switch (stringset) {
case ETH_SS_STATS:
for (i = 0; i < ARRAY_SIZE(dpaa2_mac_counters); i++)
memcpy(data + i * ETH_GSTRING_LEN,
dpaa2_mac_counters[i].name,
ETH_GSTRING_LEN);
break;
}
}
static void dpaa2_mac_get_ethtool_stats(struct net_device *netdev,
struct ethtool_stats *stats,
u64 *data)
{
struct dpaa2_mac_priv *priv = netdev_priv(netdev);
int i;
int err;
for (i = 0; i < ARRAY_SIZE(dpaa2_mac_counters); i++) {
err = dpmac_get_counter(priv->mc_dev->mc_io,
0,
priv->mc_dev->mc_handle,
dpaa2_mac_counters[i].id, &data[i]);
if (err)
netdev_err(netdev, "dpmac_get_counter[%s] err %d\n",
dpaa2_mac_counters[i].name, err);
}
}
static int dpaa2_mac_get_sset_count(struct net_device *dev, int sset)
{
switch (sset) {
case ETH_SS_STATS:
return ARRAY_SIZE(dpaa2_mac_counters);
default:
return -EOPNOTSUPP;
}
}
static const struct net_device_ops dpaa2_mac_ndo_ops = {
.ndo_open = &dpaa2_mac_open,
.ndo_stop = &dpaa2_mac_stop,
.ndo_start_xmit = &dpaa2_mac_drop_frame,
.ndo_get_stats64 = &dpaa2_mac_get_stats,
};
static const struct ethtool_ops dpaa2_mac_ethtool_ops = {
.get_drvinfo = &dpaa2_mac_get_drvinfo,
.get_link_ksettings = &dpaa2_mac_get_link_ksettings,
.set_link_ksettings = &dpaa2_mac_set_link_ksettings,
.get_strings = &dpaa2_mac_get_strings,
.get_ethtool_stats = &dpaa2_mac_get_ethtool_stats,
.get_sset_count = &dpaa2_mac_get_sset_count,
};
#endif /* CONFIG_FSL_DPAA2_MAC_NETDEVS */
static void configure_link(struct dpaa2_mac_priv *priv,
struct dpmac_link_cfg *cfg)
{
struct phy_device *phydev = priv->netdev->phydev;
if (unlikely(!phydev))
return;
phydev->speed = cfg->rate;
phydev->duplex = !!(cfg->options & DPMAC_LINK_OPT_HALF_DUPLEX);
if (cfg->advertising != 0) {
linkmode_zero(phydev->advertising);
link_mode_dpmac2phydev(cfg->advertising, phydev->advertising);
}
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported)) {
if (cfg->options & DPMAC_LINK_OPT_PAUSE)
linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->advertising);
else
linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->advertising);
}
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
if (cfg->options & DPMAC_LINK_OPT_ASYM_PAUSE)
linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->advertising);
else
linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->advertising);
}
if (cfg->options & DPMAC_LINK_OPT_AUTONEG) {
phydev->autoneg = AUTONEG_ENABLE;
linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);
} else {
phydev->autoneg = AUTONEG_DISABLE;
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);
}
phy_start_aneg(phydev);
}
static irqreturn_t dpaa2_mac_irq_handler(int irq_num, void *arg)
{
struct device *dev = (struct device *)arg;
struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
struct dpaa2_mac_priv *priv = dev_get_drvdata(dev);
struct net_device *ndev = priv->netdev;
struct dpmac_link_cfg link_cfg = { 0 };
u32 status;
int err;
err = dpmac_get_irq_status(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPMAC_IRQ_INDEX, &status);
if (unlikely(err || !status))
return IRQ_NONE;
/* DPNI-initiated link configuration; 'ifconfig up' also calls this */
if (status & DPMAC_IRQ_EVENT_LINK_CFG_REQ) {
if (cmp_dpmac_ver(priv, DPMAC_LINK_AUTONEG_VER_MAJOR,
DPMAC_LINK_AUTONEG_VER_MINOR) < 0)
err = dpmac_get_link_cfg(mc_dev->mc_io, 0,
mc_dev->mc_handle, &link_cfg);
else
err = dpmac_get_link_cfg_v2(mc_dev->mc_io, 0,
mc_dev->mc_handle,
&link_cfg);
if (unlikely(err))
goto out;
configure_link(priv, &link_cfg);
}
if (status & DPMAC_IRQ_EVENT_LINK_DOWN_REQ)
phy_stop(ndev->phydev);
if (status & DPMAC_IRQ_EVENT_LINK_UP_REQ)
phy_start(ndev->phydev);
out:
dpmac_clear_irq_status(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPMAC_IRQ_INDEX, status);
return IRQ_HANDLED;
}
static int setup_irqs(struct fsl_mc_device *mc_dev)
{
int err = 0;
struct fsl_mc_device_irq *irq;
err = fsl_mc_allocate_irqs(mc_dev);
if (err) {
dev_err(&mc_dev->dev, "fsl_mc_allocate_irqs err %d\n", err);
return err;
}
irq = mc_dev->irqs[0];
err = devm_request_threaded_irq(&mc_dev->dev, irq->msi_desc->irq,
NULL, &dpaa2_mac_irq_handler,
IRQF_NO_SUSPEND | IRQF_ONESHOT,
dev_name(&mc_dev->dev), &mc_dev->dev);
if (err) {
dev_err(&mc_dev->dev, "devm_request_threaded_irq err %d\n",
err);
goto free_irq;
}
err = dpmac_set_irq_mask(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPMAC_IRQ_INDEX, DPMAC_IRQ_EVENT_LINK_CFG_REQ |
DPMAC_IRQ_EVENT_LINK_UP_REQ |
DPMAC_IRQ_EVENT_LINK_DOWN_REQ);
if (err) {
dev_err(&mc_dev->dev, "dpmac_set_irq_mask err %d\n", err);
goto free_irq;
}
err = dpmac_set_irq_enable(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPMAC_IRQ_INDEX, 1);
if (err) {
dev_err(&mc_dev->dev, "dpmac_set_irq_enable err %d\n", err);
goto free_irq;
}
return 0;
free_irq:
fsl_mc_free_irqs(mc_dev);
return err;
}
static void teardown_irqs(struct fsl_mc_device *mc_dev)
{
int err;
err = dpmac_set_irq_enable(mc_dev->mc_io, 0, mc_dev->mc_handle,
DPMAC_IRQ_INDEX, 0);
if (err)
dev_err(&mc_dev->dev, "dpmac_set_irq_enable err %d\n", err);
fsl_mc_free_irqs(mc_dev);
}
static struct device_node *find_dpmac_node(struct device *dev, u16 dpmac_id)
{
struct device_node *dpmacs, *dpmac = NULL;
struct device_node *mc_node = dev->of_node;
u32 id;
int err;
dpmacs = of_find_node_by_name(mc_node, "dpmacs");
if (!dpmacs) {
dev_err(dev, "No dpmacs subnode in device-tree\n");
return NULL;
}
while ((dpmac = of_get_next_child(dpmacs, dpmac))) {
err = of_property_read_u32(dpmac, "reg", &id);
if (err)
continue;
if (id == dpmac_id)
return dpmac;
}
return NULL;
}
static int dpaa2_mac_probe(struct fsl_mc_device *mc_dev)
{
struct device *dev;
struct dpaa2_mac_priv *priv = NULL;
struct device_node *phy_node, *dpmac_node;
struct net_device *netdev;
int if_mode;
int err = 0;
dev = &mc_dev->dev;
/* prepare a net_dev structure to make the phy lib API happy */
netdev = alloc_etherdev(sizeof(*priv));
if (!netdev) {
dev_err(dev, "alloc_etherdev error\n");
err = -ENOMEM;
goto err_exit;
}
priv = netdev_priv(netdev);
priv->mc_dev = mc_dev;
priv->netdev = netdev;
SET_NETDEV_DEV(netdev, dev);
#ifdef CONFIG_FSL_DPAA2_MAC_NETDEVS
snprintf(netdev->name, IFNAMSIZ, "mac%d", mc_dev->obj_desc.id);
#endif
dev_set_drvdata(dev, priv);
/* We may need to issue MC commands while in atomic context */
err = fsl_mc_portal_allocate(mc_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
&mc_dev->mc_io);
if (err || !mc_dev->mc_io) {
dev_dbg(dev, "fsl_mc_portal_allocate error: %d\n", err);
err = -EPROBE_DEFER;
goto err_free_netdev;
}
err = dpmac_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
&mc_dev->mc_handle);
if (err || !mc_dev->mc_handle) {
dev_err(dev, "dpmac_open error: %d\n", err);
err = -ENODEV;
goto err_free_mcp;
}
err = dpmac_get_api_version(mc_dev->mc_io, 0, &priv->dpmac_ver_major,
&priv->dpmac_ver_minor);
if (err) {
dev_err(dev, "dpmac_get_api_version failed\n");
goto err_version;
}
if (cmp_dpmac_ver(priv, DPMAC_VER_MAJOR, DPMAC_VER_MINOR) < 0) {
dev_err(dev, "DPMAC version %u.%u lower than supported %u.%u\n",
priv->dpmac_ver_major, priv->dpmac_ver_minor,
DPMAC_VER_MAJOR, DPMAC_VER_MINOR);
err = -ENOTSUPP;
goto err_version;
}
err = dpmac_get_attributes(mc_dev->mc_io, 0,
mc_dev->mc_handle, &priv->attr);
if (err) {
dev_err(dev, "dpmac_get_attributes err %d\n", err);
err = -EINVAL;
goto err_close;
}
/* Look up the DPMAC node in the device-tree. */
dpmac_node = find_dpmac_node(dev, priv->attr.id);
if (!dpmac_node) {
dev_err(dev, "No dpmac@%d subnode found.\n", priv->attr.id);
err = -ENODEV;
goto err_close;
}
err = setup_irqs(mc_dev);
if (err) {
err = -EFAULT;
goto err_close;
}
#ifdef CONFIG_FSL_DPAA2_MAC_NETDEVS
/* OPTIONAL, register netdev just to make it visible to the user */
netdev->netdev_ops = &dpaa2_mac_ndo_ops;
netdev->ethtool_ops = &dpaa2_mac_ethtool_ops;
err = register_netdev(priv->netdev);
if (err < 0) {
dev_err(dev, "register_netdev error %d\n", err);
err = -ENODEV;
goto err_free_irq;
}
#endif /* CONFIG_FSL_DPAA2_MAC_NETDEVS */
/* get the interface mode from the dpmac of node or from the MC attributes */
if_mode = of_get_phy_mode(dpmac_node);
if (if_mode >= 0) {
dev_dbg(dev, "\tusing if mode %s for eth_if %d\n",
phy_modes(if_mode), priv->attr.eth_if);
goto link_type;
}
if (priv->attr.eth_if < ARRAY_SIZE(dpaa2_mac_iface_mode)) {
if_mode = dpaa2_mac_iface_mode[priv->attr.eth_if];
dev_dbg(dev, "\tusing if mode %s for eth_if %d\n",
phy_modes(if_mode), priv->attr.eth_if);
} else {
dev_err(dev, "Unexpected interface mode %d\n",
priv->attr.eth_if);
err = -EINVAL;
goto err_no_if_mode;
}
link_type:
/* probe the PHY as fixed-link if the DPMAC attribute indicates so */
if (priv->attr.link_type == DPMAC_LINK_TYPE_FIXED)
goto probe_fixed_link;
/* or if there's no phy-handle defined in the device tree */
phy_node = of_parse_phandle(dpmac_node, "phy-handle", 0);
if (!phy_node) {
goto probe_fixed_link;
}
/* try to connect to the PHY */
netdev->phydev = of_phy_connect(netdev, phy_node,
&dpaa2_mac_link_changed, 0, if_mode);
if (!netdev->phydev) {
/* No need for dev_err(); the kernel's loud enough as it is. */
dev_dbg(dev, "Can't of_phy_connect() now.\n");
/* We might be waiting for the MDIO MUX to probe, so defer
* our own probing.
*/
err = -EPROBE_DEFER;
goto err_defer;
}
dev_info(dev, "Connected to %s PHY.\n", phy_modes(if_mode));
probe_fixed_link:
if (!netdev->phydev) {
struct fixed_phy_status status = {
.link = 1,
/* fixed-phys don't support 10Gbps speed for now */
.speed = 1000,
.duplex = 1,
};
/* try to register a fixed link phy */
netdev->phydev = fixed_phy_register(PHY_POLL, &status, NULL);
if (!netdev->phydev || IS_ERR(netdev->phydev)) {
dev_err(dev, "error trying to register fixed PHY\n");
/* So we don't crash unregister_netdev() later on */
netdev->phydev = NULL;
err = -EFAULT;
goto err_no_phy;
}
err = phy_connect_direct(netdev, netdev->phydev,
&dpaa2_mac_link_changed, if_mode);
if (err) {
dev_err(dev, "error trying to connect to PHY\n");
goto err_no_phy;
}
dev_info(dev, "Registered fixed PHY.\n");
}
return 0;
err_no_if_mode:
err_defer:
err_no_phy:
#ifdef CONFIG_FSL_DPAA2_MAC_NETDEVS
unregister_netdev(netdev);
err_free_irq:
#endif
teardown_irqs(mc_dev);
err_version:
err_close:
dpmac_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
err_free_mcp:
fsl_mc_portal_free(mc_dev->mc_io);
err_free_netdev:
free_netdev(netdev);
err_exit:
return err;
}
static int dpaa2_mac_remove(struct fsl_mc_device *mc_dev)
{
struct device *dev = &mc_dev->dev;
struct dpaa2_mac_priv *priv = dev_get_drvdata(dev);
struct net_device *netdev = priv->netdev;
if (netdev->flags & IFF_UP)
dpaa2_mac_stop(netdev);
if (phy_is_pseudo_fixed_link(netdev->phydev))
fixed_phy_unregister(netdev->phydev);
else
phy_disconnect(netdev->phydev);
netdev->phydev = NULL;
#ifdef CONFIG_FSL_DPAA2_MAC_NETDEVS
unregister_netdev(priv->netdev);
#endif
teardown_irqs(priv->mc_dev);
dpmac_close(priv->mc_dev->mc_io, 0, priv->mc_dev->mc_handle);
fsl_mc_portal_free(priv->mc_dev->mc_io);
free_netdev(priv->netdev);
dev_set_drvdata(dev, NULL);
return 0;
}
static const struct fsl_mc_device_id dpaa2_mac_match_id_table[] = {
{
.vendor = FSL_MC_VENDOR_FREESCALE,
.obj_type = "dpmac",
},
{ .vendor = 0x0 }
};
MODULE_DEVICE_TABLE(fslmc, dpaa2_mac_match_id_table);
static struct fsl_mc_driver dpaa2_mac_drv = {
.driver = {
.name = KBUILD_MODNAME,
.owner = THIS_MODULE,
},
.probe = dpaa2_mac_probe,
.remove = dpaa2_mac_remove,
.match_id_table = dpaa2_mac_match_id_table,
};
module_fsl_mc_driver(dpaa2_mac_drv);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DPAA2 PHY proxy interface driver");
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