[PATCH v6 1/4] net: macb: add phylink support

Parshuram Thombare
2019-07-10T14:38:02Z

This patch replace phylib API's by phylink API's.

Signed-off-by: Parshuram Thombare <pthombar@cadence.com>
---
drivers/net/ethernet/cadence/Kconfig | 2 +-
drivers/net/ethernet/cadence/macb.h | 3 +
drivers/net/ethernet/cadence/macb_main.c | 332 +++++++++++++----------
3 files changed, 187 insertions(+), 150 deletions(-)

diff --git a/drivers/net/ethernet/cadence/Kconfig b/drivers/net/ethernet/cadence/Kconfig
index f4b3bd85dfe3..53b50c24d9c9 100644
--- a/drivers/net/ethernet/cadence/Kconfig
+++ b/drivers/net/ethernet/cadence/Kconfig
@@ -22,7 +22,7 @@ if NET_VENDOR_CADENCE
config MACB
tristate "Cadence MACB/GEM support"
depends on HAS_DMA && COMMON_CLK
- select PHYLIB
+ select PHYLINK
---help---
The Cadence MACB ethernet interface is found on many Atmel AT32 and
AT91 parts. This driver also supports the Cadence GEM (Gigabit
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index 03983bd46eef..a4007057b35e 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -11,6 +11,7 @@
#include <linux/ptp_clock_kernel.h>
#include <linux/net_tstamp.h>
#include <linux/interrupt.h>
+#include <linux/phylink.h>

#if defined(CONFIG_ARCH_DMA_ADDR_T_64BIT) || defined(CONFIG_MACB_USE_HWSTAMP)
#define MACB_EXT_DESC
@@ -1232,6 +1233,8 @@ struct macb {
u32 rx_intr_mask;

struct macb_pm_data pm_data;
+ struct phylink *pl;
+ struct phylink_config pl_config;
};

#ifdef CONFIG_MACB_USE_HWSTAMP
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 5ca17e62dc3e..ce064eb9252a 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -36,6 +36,7 @@
#include <linux/tcp.h>
#include <linux/iopoll.h>
#include <linux/pm_runtime.h>
+#include <linux/phylink.h>
#include "macb.h"

/* This structure is only used for MACB on SiFive FU540 devices */
@@ -433,115 +434,160 @@ static void macb_set_tx_clk(struct clk *clk, int speed, struct net_device *dev)
netdev_err(dev, "adjusting tx_clk failed.\n");
}

-static void macb_handle_link_change(struct net_device *dev)
+static void gem_phylink_validate(struct phylink_config *pl_config,
+ unsigned long *supported,
+ struct phylink_link_state *state)
{
- struct macb *bp = netdev_priv(dev);
- struct phy_device *phydev = dev->phydev;
+ struct net_device *netdev = to_net_dev(pl_config->dev);
+ struct macb *bp = netdev_priv(netdev);
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+
+ switch (state->interface) {
+ case PHY_INTERFACE_MODE_GMII:
+ case PHY_INTERFACE_MODE_RGMII:
+ if (!macb_is_gem(bp))
+ goto empty_set;
+ break;
+ default:
+ break;
+ }
+
+ switch (state->interface) {
+ case PHY_INTERFACE_MODE_GMII:
+ case PHY_INTERFACE_MODE_RGMII:
+ if (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE) {
+ phylink_set(mask, 1000baseT_Full);
+ phylink_set(mask, 1000baseX_Full);
+ if (!(bp->caps & MACB_CAPS_NO_GIGABIT_HALF))
+ phylink_set(mask, 1000baseT_Half);
+ }
+ /* fallthrough */
+ case PHY_INTERFACE_MODE_MII:
+ case PHY_INTERFACE_MODE_RMII:
+ phylink_set(mask, 10baseT_Half);
+ phylink_set(mask, 10baseT_Full);
+ phylink_set(mask, 100baseT_Half);
+ phylink_set(mask, 100baseT_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 int gem_phylink_mac_link_state(struct phylink_config *pl_config,
+ struct phylink_link_state *state)
+{
+ return -EOPNOTSUPP;
+}
+
+static void gem_mac_config(struct phylink_config *pl_config, unsigned int mode,
+ const struct phylink_link_state *state)
+{
+ struct net_device *netdev = to_net_dev(pl_config->dev);
+ struct macb *bp = netdev_priv(netdev);
+ bool change_interface = bp->phy_interface != state->interface;
unsigned long flags;
- int status_change = 0;

spin_lock_irqsave(&bp->lock, flags);

- if (phydev->link) {
- if ((bp->speed != phydev->speed) ||
- (bp->duplex != phydev->duplex)) {
- u32 reg;
+ if (change_interface)
+ bp->phy_interface = state->interface;

- reg = macb_readl(bp, NCFGR);
- reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
- if (macb_is_gem(bp))
- reg &= ~GEM_BIT(GBE);
+ if (!phylink_autoneg_inband(mode) &&
+ (bp->speed != state->speed ||
+ bp->duplex != state->duplex)) {
+ u32 reg;

- if (phydev->duplex)
- reg |= MACB_BIT(FD);
- if (phydev->speed == SPEED_100)
- reg |= MACB_BIT(SPD);
- if (phydev->speed == SPEED_1000 &&
- bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)
- reg |= GEM_BIT(GBE);
-
- macb_or_gem_writel(bp, NCFGR, reg);
+ reg = macb_readl(bp, NCFGR);
+ reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
+ if (macb_is_gem(bp))
+ reg &= ~GEM_BIT(GBE);
+ if (state->duplex)
+ reg |= MACB_BIT(FD);

- bp->speed = phydev->speed;
- bp->duplex = phydev->duplex;
- status_change = 1;
+ switch (state->speed) {
+ case SPEED_1000:
+ reg |= GEM_BIT(GBE);
+ break;
+ case SPEED_100:
+ reg |= MACB_BIT(SPD);
+ break;
+ default:
+ break;
}
- }
+ macb_or_gem_writel(bp, NCFGR, reg);

- if (phydev->link != bp->link) {
- if (!phydev->link) {
- bp->speed = 0;
- bp->duplex = -1;
- }
- bp->link = phydev->link;
+ bp->speed = state->speed;
+ bp->duplex = state->duplex;

- status_change = 1;
+ if (state->link)
+ macb_set_tx_clk(bp->tx_clk, state->speed, netdev);
}

spin_unlock_irqrestore(&bp->lock, flags);
+}

- if (status_change) {
- if (phydev->link) {
- /* Update the TX clock rate if and only if the link is
- * up and there has been a link change.
- */
- macb_set_tx_clk(bp->tx_clk, phydev->speed, dev);
+static void gem_mac_link_up(struct phylink_config *pl_config, unsigned int mode,
+ phy_interface_t interface, struct phy_device *phy)
+{
+ struct net_device *netdev = to_net_dev(pl_config->dev);
+ struct macb *bp = netdev_priv(netdev);

- netif_carrier_on(dev);
- netdev_info(dev, "link up (%d/%s)\n",
- phydev->speed,
- phydev->duplex == DUPLEX_FULL ?
- "Full" : "Half");
- } else {
- netif_carrier_off(dev);
- netdev_info(dev, "link down\n");
- }
- }
+ bp->link = 1;
+ /* Enable TX and RX */
+ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE));
+}
+
+static void gem_mac_link_down(struct phylink_config *pl_config,
+ unsigned int mode, phy_interface_t interface)
+{
+ struct net_device *netdev = to_net_dev(pl_config->dev);
+ struct macb *bp = netdev_priv(netdev);
+
+ bp->link = 0;
+ /* Disable TX and RX */
+ macb_writel(bp, NCR,
+ macb_readl(bp, NCR) & ~(MACB_BIT(RE) | MACB_BIT(TE)));
}

+static const struct phylink_mac_ops gem_phylink_ops = {
+ .validate = gem_phylink_validate,
+ .mac_link_state = gem_phylink_mac_link_state,
+ .mac_config = gem_mac_config,
+ .mac_link_up = gem_mac_link_up,
+ .mac_link_down = gem_mac_link_down,
+};
+
/* based on au1000_eth. c*/
-static int macb_mii_probe(struct net_device *dev)
+static int macb_mii_probe(struct net_device *dev, phy_interface_t phy_mode)
{
struct macb *bp = netdev_priv(dev);
struct phy_device *phydev;
struct device_node *np;
- int ret, i;
+ int ret;

np = bp->pdev->dev.of_node;
ret = 0;

- if (np) {
- if (of_phy_is_fixed_link(np)) {
- bp->phy_node = of_node_get(np);
- } else {
- bp->phy_node = of_parse_phandle(np, "phy-handle", 0);
- /* fallback to standard phy registration if no
- * phy-handle was found nor any phy found during
- * dt phy registration
- */
- if (!bp->phy_node && !phy_find_first(bp->mii_bus)) {
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- phydev = mdiobus_scan(bp->mii_bus, i);
- if (IS_ERR(phydev) &&
- PTR_ERR(phydev) != -ENODEV) {
- ret = PTR_ERR(phydev);
- break;
- }
- }
-
- if (ret)
- return -ENODEV;
- }
- }
+ bp->pl_config.dev = &dev->dev;
+ bp->pl_config.type = PHYLINK_NETDEV;
+ bp->pl = phylink_create(&bp->pl_config, of_fwnode_handle(np),
+ phy_mode, &gem_phylink_ops);
+ if (IS_ERR(bp->pl)) {
+ netdev_err(dev,
+ "error creating PHYLINK: %ld\n", PTR_ERR(bp->pl));
+ return PTR_ERR(bp->pl);
}

- if (bp->phy_node) {
- phydev = of_phy_connect(dev, bp->phy_node,
- &macb_handle_link_change, 0,
- bp->phy_interface);
- if (!phydev)
- return -ENODEV;
- } else {
+ ret = phylink_of_phy_connect(bp->pl, np, 0);
+ if (ret == -ENODEV && bp->mii_bus) {
phydev = phy_find_first(bp->mii_bus);
if (!phydev) {
netdev_err(dev, "no PHY found\n");
@@ -549,32 +595,22 @@ static int macb_mii_probe(struct net_device *dev)
}

/* attach the mac to the phy */
- ret = phy_connect_direct(dev, phydev, &macb_handle_link_change,
- bp->phy_interface);
+ ret = phylink_connect_phy(bp->pl, phydev);
if (ret) {
netdev_err(dev, "Could not attach to PHY\n");
return ret;
}
}

- /* mask with MAC supported features */
- if (macb_is_gem(bp) && bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)
- phy_set_max_speed(phydev, SPEED_1000);
- else
- phy_set_max_speed(phydev, SPEED_100);
-
- if (bp->caps & MACB_CAPS_NO_GIGABIT_HALF)
- phy_remove_link_mode(phydev,
- ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
-
bp->link = 0;
- bp->speed = 0;
- bp->duplex = -1;
+ bp->speed = SPEED_UNKNOWN;
+ bp->duplex = DUPLEX_UNKNOWN;
+ bp->phy_interface = PHY_INTERFACE_MODE_MAX;

- return 0;
+ return ret;
}

-static int macb_mii_init(struct macb *bp)
+static int macb_mii_init(struct macb *bp, phy_interface_t phy_mode)
{
struct device_node *np;
int err = -ENXIO;
@@ -599,22 +635,12 @@ static int macb_mii_init(struct macb *bp)
dev_set_drvdata(&bp->dev->dev, bp->mii_bus);

np = bp->pdev->dev.of_node;
- if (np && of_phy_is_fixed_link(np)) {
- if (of_phy_register_fixed_link(np) < 0) {
- dev_err(&bp->pdev->dev,
- "broken fixed-link specification %pOF\n", np);
- goto err_out_free_mdiobus;
- }
-
- err = mdiobus_register(bp->mii_bus);
- } else {
- err = of_mdiobus_register(bp->mii_bus, np);
- }
+ err = of_mdiobus_register(bp->mii_bus, np);

if (err)
goto err_out_free_fixed_link;

- err = macb_mii_probe(bp->dev);
+ err = macb_mii_probe(bp->dev, phy_mode);
if (err)
goto err_out_unregister_bus;

@@ -625,7 +651,6 @@ static int macb_mii_init(struct macb *bp)
err_out_free_fixed_link:
if (np && of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
-err_out_free_mdiobus:
of_node_put(bp->phy_node);
mdiobus_free(bp->mii_bus);
err_out:
@@ -2418,12 +2443,6 @@ static int macb_open(struct net_device *dev)
/* carrier starts down */
netif_carrier_off(dev);

- /* if the phy is not yet register, retry later*/
- if (!dev->phydev) {
- err = -EAGAIN;
- goto pm_exit;
- }
-
/* RX buffers initialization */
macb_init_rx_buffer_size(bp, bufsz);

@@ -2441,7 +2460,7 @@ static int macb_open(struct net_device *dev)
macb_init_hw(bp);

/* schedule a link state check */
- phy_start(dev->phydev);
+ phylink_start(bp->pl);

netif_tx_start_all_queues(dev);

@@ -2468,8 +2487,7 @@ static int macb_close(struct net_device *dev)
for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
napi_disable(&queue->napi);

- if (dev->phydev)
- phy_stop(dev->phydev);
+ phylink_stop(bp->pl);

spin_lock_irqsave(&bp->lock, flags);
macb_reset_hw(bp);
@@ -3158,6 +3176,23 @@ static int gem_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
return ret;
}

+static int gem_ethtool_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct macb *bp = netdev_priv(netdev);
+
+ return phylink_ethtool_ksettings_get(bp->pl, cmd);
+}
+
+static int
+gem_ethtool_set_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct macb *bp = netdev_priv(netdev);
+
+ return phylink_ethtool_ksettings_set(bp->pl, cmd);
+}
+
static const struct ethtool_ops macb_ethtool_ops = {
.get_regs_len = macb_get_regs_len,
.get_regs = macb_get_regs,
@@ -3165,8 +3200,8 @@ static const struct ethtool_ops macb_ethtool_ops = {
.get_ts_info = ethtool_op_get_ts_info,
.get_wol = macb_get_wol,
.set_wol = macb_set_wol,
- .get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_link_ksettings = gem_ethtool_get_link_ksettings,
+ .set_link_ksettings = gem_ethtool_set_link_ksettings,
.get_ringparam = macb_get_ringparam,
.set_ringparam = macb_set_ringparam,
};
@@ -3179,8 +3214,8 @@ static const struct ethtool_ops gem_ethtool_ops = {
.get_ethtool_stats = gem_get_ethtool_stats,
.get_strings = gem_get_ethtool_strings,
.get_sset_count = gem_get_sset_count,
- .get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_link_ksettings = gem_ethtool_get_link_ksettings,
+ .set_link_ksettings = gem_ethtool_set_link_ksettings,
.get_ringparam = macb_get_ringparam,
.set_ringparam = macb_set_ringparam,
.get_rxnfc = gem_get_rxnfc,
@@ -3189,17 +3224,13 @@ static const struct ethtool_ops gem_ethtool_ops = {

static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
- struct phy_device *phydev = dev->phydev;
struct macb *bp = netdev_priv(dev);

if (!netif_running(dev))
return -EINVAL;

- if (!phydev)
- return -ENODEV;
-
if (!bp->ptp_info)
- return phy_mii_ioctl(phydev, rq, cmd);
+ return phylink_mii_ioctl(bp->pl, rq, cmd);

switch (cmd) {
case SIOCSHWTSTAMP:
@@ -3207,7 +3238,7 @@ static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
case SIOCGHWTSTAMP:
return bp->ptp_info->get_hwtst(dev, rq);
default:
- return phy_mii_ioctl(phydev, rq, cmd);
+ return phylink_mii_ioctl(bp->pl, rq, cmd);
}
}

@@ -3709,7 +3740,7 @@ static int at91ether_open(struct net_device *dev)
MACB_BIT(HRESP));

/* schedule a link state check */
- phy_start(dev->phydev);
+ phylink_start(lp->pl);

netif_start_queue(dev);

@@ -4182,13 +4213,12 @@ static int macb_probe(struct platform_device *pdev)
struct clk *tsu_clk = NULL;
unsigned int queue_mask, num_queues;
bool native_io;
- struct phy_device *phydev;
struct net_device *dev;
struct resource *regs;
void __iomem *mem;
const char *mac;
struct macb *bp;
- int err, val;
+ int err, val, phy_mode;

regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mem = devm_ioremap_resource(&pdev->dev, regs);
@@ -4309,24 +4339,20 @@ static int macb_probe(struct platform_device *pdev)
macb_get_hwaddr(bp);
}

- err = of_get_phy_mode(np);
- if (err < 0)
+ phy_mode = of_get_phy_mode(np);
+ if (phy_mode < 0)
/* not found in DT, MII by default */
- bp->phy_interface = PHY_INTERFACE_MODE_MII;
- else
- bp->phy_interface = err;
+ phy_mode = PHY_INTERFACE_MODE_MII;

/* IP specific init */
err = init(pdev);
if (err)
goto err_out_free_netdev;

- err = macb_mii_init(bp);
+ err = macb_mii_init(bp, phy_mode);
if (err)
goto err_out_free_netdev;

- phydev = dev->phydev;
-
netif_carrier_off(dev);

err = register_netdev(dev);
@@ -4338,8 +4364,6 @@ static int macb_probe(struct platform_device *pdev)
tasklet_init(&bp->hresp_err_tasklet, macb_hresp_error_task,
(unsigned long)bp);

- phy_attached_info(phydev);
-
netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n",
macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID),
dev->base_addr, dev->irq, dev->dev_addr);
@@ -4350,7 +4374,9 @@ static int macb_probe(struct platform_device *pdev)
return 0;

err_out_unregister_mdio:
- phy_disconnect(dev->phydev);
+ rtnl_lock();
+ phylink_disconnect_phy(bp->pl);
+ rtnl_unlock();
mdiobus_unregister(bp->mii_bus);
of_node_put(bp->phy_node);
if (np && of_phy_is_fixed_link(np))
@@ -4384,13 +4410,18 @@ static int macb_remove(struct platform_device *pdev)

if (dev) {
bp = netdev_priv(dev);
- if (dev->phydev)
- phy_disconnect(dev->phydev);
+ if (bp->pl) {
+ rtnl_lock();
+ phylink_disconnect_phy(bp->pl);
+ rtnl_unlock();
+ }
mdiobus_unregister(bp->mii_bus);
if (np && of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
dev->phydev = NULL;
mdiobus_free(bp->mii_bus);
+ if (bp->pl)
+ phylink_destroy(bp->pl);

unregister_netdev(dev);
pm_runtime_disable(&pdev->dev);
@@ -4433,8 +4464,9 @@ static int __maybe_unused macb_suspend(struct device *dev)
for (q = 0, queue = bp->queues; q < bp->num_queues;
++q, ++queue)
napi_disable(&queue->napi);
- phy_stop(netdev->phydev);
- phy_suspend(netdev->phydev);
+ phylink_stop(bp->pl);
+ if (netdev->phydev)
+ phy_suspend(netdev->phydev);
spin_lock_irqsave(&bp->lock, flags);
macb_reset_hw(bp);
spin_unlock_irqrestore(&bp->lock, flags);
@@ -4482,9 +4514,11 @@ static int __maybe_unused macb_resume(struct device *dev)
for (q = 0, queue = bp->queues; q < bp->num_queues;
++q, ++queue)
napi_enable(&queue->napi);
- phy_resume(netdev->phydev);
- phy_init_hw(netdev->phydev);
- phy_start(netdev->phydev);
+ if (netdev->phydev) {
+ phy_resume(netdev->phydev);
+ phy_init_hw(netdev->phydev);
+ }
+ phylink_start(bp->pl);
}

bp->macbgem_ops.mog_init_rings(bp);
--
2.17.1