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net: bcmgenet: Delay PHY initialization to bcmgenet_open() 

We are currently doing a full PHY initialization and even starting the
pHY state machine during bcmgenet_mii_init() which is executed in the
driver's probe function. This is convenient to determine whether we can
attach to a proper PHY device but comes at the expense of spending up to
10ms per MDIO transactions (to reach the waitqueue timeout), which slows
things down.

This also creates a sitaution where we end-up attaching twice to the
PHY, which is not quite correct either.

Fix this by moving bcmgenet_mii_probe() into bcmgenet_open() and update
its error path accordingly.

Avoid printing the message "attached PHY at address 1 [...]" every time
we bring up/down the interface and remove this print since it duplicates
what the PHY driver already does for us.

Fixes: 1c1008c793 ("net: bcmgenet: add main driver file")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Florian Fainelli 2015-07-16 15:51:18 -07:00 committed by David S. Miller
parent c624f89121
commit 6cc8e6d4dc
3 changed files with 20 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/ethernet/broadcom/genet/bcmgenet.c
View File

@ -2686,16 +2686,18 @@ static int bcmgenet_open(struct net_device *dev)
goto err_irq0;
}
/* Re-configure the port multiplexer towards the PHY device */
bcmgenet_mii_config(priv->dev, false);
phy_connect_direct(dev, priv->phydev, bcmgenet_mii_setup,
priv->phy_interface);
ret = bcmgenet_mii_probe(dev);
if (ret) {
netdev_err(dev, "failed to connect to PHY\n");
goto err_irq1;
}
bcmgenet_netif_start(dev);
return 0;
err_irq1:
free_irq(priv->irq1, priv);
err_irq0:
free_irq(priv->irq0, priv);
err_fini_dma:

1
drivers/net/ethernet/broadcom/genet/bcmgenet.h
View File

@ -672,6 +672,7 @@ GENET_IO_MACRO(rbuf, GENET_RBUF_OFF);
/* MDIO routines */
int bcmgenet_mii_init(struct net_device *dev);
int bcmgenet_mii_config(struct net_device *dev, bool init);
int bcmgenet_mii_probe(struct net_device *dev);
void bcmgenet_mii_exit(struct net_device *dev);
void bcmgenet_phy_power_set(struct net_device *dev, bool enable);
void bcmgenet_mii_setup(struct net_device *dev);

37
drivers/net/ethernet/broadcom/genet/bcmmii.c
View File

@ -316,7 +316,7 @@ int bcmgenet_mii_config(struct net_device *dev, bool init)
return 0;
}
static int bcmgenet_mii_probe(struct net_device *dev)
int bcmgenet_mii_probe(struct net_device *dev)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct device_node *dn = priv->pdev->dev.of_node;
@ -334,22 +334,6 @@ static int bcmgenet_mii_probe(struct net_device *dev)
priv->old_pause = -1;
if (dn) {
if (priv->phydev) {
pr_info("PHY already attached\n");
return 0;
}
/* In the case of a fixed PHY, the DT node associated
* to the PHY is the Ethernet MAC DT node.
*/
if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {
ret = of_phy_register_fixed_link(dn);
if (ret)
return ret;
priv->phy_dn = of_node_get(dn);
}
phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup,
phy_flags, priv->phy_interface);
if (!phydev) {
@ -391,9 +375,6 @@ static int bcmgenet_mii_probe(struct net_device *dev)
else
priv->mii_bus->irq[phydev->addr] = PHY_POLL;
pr_info("attached PHY at address %d [%s]\n",
phydev->addr, phydev->drv->name);
return 0;
}
@ -504,6 +485,17 @@ static int bcmgenet_mii_of_init(struct bcmgenet_priv *priv)
/* Fetch the PHY phandle */
priv->phy_dn = of_parse_phandle(dn, "phy-handle", 0);
/* In the case of a fixed PHY, the DT node associated
* to the PHY is the Ethernet MAC DT node.
*/
if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {
ret = of_phy_register_fixed_link(dn);
if (ret)
return ret;
priv->phy_dn = of_node_get(dn);
}
/* Get the link mode */
phy_mode = of_get_phy_mode(dn);
priv->phy_interface = phy_mode;
@ -622,10 +614,6 @@ int bcmgenet_mii_init(struct net_device *dev)
return ret;
ret = bcmgenet_mii_bus_init(priv);
if (ret)
goto out_free;
ret = bcmgenet_mii_probe(dev);
if (ret)
goto out;
@ -634,7 +622,6 @@ int bcmgenet_mii_init(struct net_device *dev)
out:
of_node_put(priv->phy_dn);
mdiobus_unregister(priv->mii_bus);
out_free:
kfree(priv->mii_bus->irq);
mdiobus_free(priv->mii_bus);
return ret;