From 6cc8e6d4dcb3651eea9b01db3e195fffb19fb24f Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 16 Jul 2015 15:51:18 -0700 Subject: [PATCH] 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: 1c1008c793fa4 ("net: bcmgenet: add main driver file") Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- .../net/ethernet/broadcom/genet/bcmgenet.c | 12 +++--- .../net/ethernet/broadcom/genet/bcmgenet.h | 1 + drivers/net/ethernet/broadcom/genet/bcmmii.c | 37 ++++++------------- 3 files changed, 20 insertions(+), 30 deletions(-) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index 076565463226..fbab7757adfa 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -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: diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h b/drivers/net/ethernet/broadcom/genet/bcmgenet.h index 84274de83670..e25b5327cc40 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h @@ -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); diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c index 35df947e738c..b503897a0da3 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -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;