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Message-ID: <20140805183044.32561.20187.stgit@tlendack-t1.amdoffice.net>
Date: Tue, 5 Aug 2014 13:30:44 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>
Subject: [PATCH net-next v2 2/2] amd-xgbe: Perform phy connect/disconnect at
dev open/stop
A change added to the mdiobus/phy api added a module_get/module_put
during phy connect/disconnect processing. Currently, the driver
performs a phy connect during module probe and a phy disconnect during
module remove. With the addition of the module_get during phy connect
the amd-xgbe module use count is incremented and can no longer be
unloaded.
Move the phy connect/disconnect from the driver probe/remove functions
to the net_device_ops ndo_open/ndo_stop functions. This allows the
module use count to be decremented when the device(s) are brought down
and allows the module to be unloaded.
Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
---
drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 122 +++++++++++++++++++++++++++++
drivers/net/ethernet/amd/xgbe/xgbe-mdio.c | 98 -----------------------
2 files changed, 121 insertions(+), 99 deletions(-)
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 3bf3c01..1f5487f 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -122,6 +122,7 @@
#include <linux/clk.h>
#include <linux/if_ether.h>
#include <linux/net_tstamp.h>
+#include <linux/phy.h>
#include "xgbe.h"
#include "xgbe-common.h"
@@ -521,6 +522,114 @@ static void xgbe_free_rx_skbuff(struct xgbe_prv_data *pdata)
DBGPR("<--xgbe_free_rx_skbuff\n");
}
+static void xgbe_adjust_link(struct net_device *netdev)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+ struct xgbe_hw_if *hw_if = &pdata->hw_if;
+ struct phy_device *phydev = pdata->phydev;
+ int new_state = 0;
+
+ if (phydev == NULL)
+ return;
+
+ if (phydev->link) {
+ /* Flow control support */
+ if (pdata->pause_autoneg) {
+ if (phydev->pause || phydev->asym_pause) {
+ pdata->tx_pause = 1;
+ pdata->rx_pause = 1;
+ } else {
+ pdata->tx_pause = 0;
+ pdata->rx_pause = 0;
+ }
+ }
+
+ if (pdata->tx_pause != pdata->phy_tx_pause) {
+ hw_if->config_tx_flow_control(pdata);
+ pdata->phy_tx_pause = pdata->tx_pause;
+ }
+
+ if (pdata->rx_pause != pdata->phy_rx_pause) {
+ hw_if->config_rx_flow_control(pdata);
+ pdata->phy_rx_pause = pdata->rx_pause;
+ }
+
+ /* Speed support */
+ if (phydev->speed != pdata->phy_speed) {
+ new_state = 1;
+
+ switch (phydev->speed) {
+ case SPEED_10000:
+ hw_if->set_xgmii_speed(pdata);
+ break;
+
+ case SPEED_2500:
+ hw_if->set_gmii_2500_speed(pdata);
+ break;
+
+ case SPEED_1000:
+ hw_if->set_gmii_speed(pdata);
+ break;
+ }
+ pdata->phy_speed = phydev->speed;
+ }
+
+ if (phydev->link != pdata->phy_link) {
+ new_state = 1;
+ pdata->phy_link = 1;
+ }
+ } else if (pdata->phy_link) {
+ new_state = 1;
+ pdata->phy_link = 0;
+ pdata->phy_speed = SPEED_UNKNOWN;
+ }
+
+ if (new_state)
+ phy_print_status(phydev);
+}
+
+static int xgbe_phy_init(struct xgbe_prv_data *pdata)
+{
+ struct net_device *netdev = pdata->netdev;
+ struct phy_device *phydev = pdata->phydev;
+ int ret;
+
+ pdata->phy_link = -1;
+ pdata->phy_speed = SPEED_UNKNOWN;
+ pdata->phy_tx_pause = pdata->tx_pause;
+ pdata->phy_rx_pause = pdata->rx_pause;
+
+ ret = phy_connect_direct(netdev, phydev, &xgbe_adjust_link,
+ pdata->phy_mode);
+ if (ret) {
+ netdev_err(netdev, "phy_connect_direct failed\n");
+ return ret;
+ }
+
+ if (!phydev->drv || (phydev->drv->phy_id == 0)) {
+ netdev_err(netdev, "phy_id not valid\n");
+ ret = -ENODEV;
+ goto err_phy_connect;
+ }
+ DBGPR(" phy_connect_direct succeeded for PHY %s, link=%d\n",
+ dev_name(&phydev->dev), phydev->link);
+
+ return 0;
+
+err_phy_connect:
+ phy_disconnect(phydev);
+
+ return ret;
+}
+
+static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
+{
+ if (!pdata->phydev)
+ return;
+
+ phy_disconnect(pdata->phydev);
+}
+
int xgbe_powerdown(struct net_device *netdev, unsigned int caller)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
@@ -986,11 +1095,16 @@ static int xgbe_open(struct net_device *netdev)
DBGPR("-->xgbe_open\n");
+ /* Initialize the phy */
+ ret = xgbe_phy_init(pdata);
+ if (ret)
+ return ret;
+
/* Enable the clocks */
ret = clk_prepare_enable(pdata->sysclk);
if (ret) {
netdev_alert(netdev, "dma clk_prepare_enable failed\n");
- return ret;
+ goto err_phy_init;
}
ret = clk_prepare_enable(pdata->ptpclk);
@@ -1047,6 +1161,9 @@ err_ptpclk:
err_sysclk:
clk_disable_unprepare(pdata->sysclk);
+err_phy_init:
+ xgbe_phy_exit(pdata);
+
return ret;
}
@@ -1077,6 +1194,9 @@ static int xgbe_close(struct net_device *netdev)
clk_disable_unprepare(pdata->ptpclk);
clk_disable_unprepare(pdata->sysclk);
+ /* Release the phy */
+ xgbe_phy_exit(pdata);
+
DBGPR("<--xgbe_close\n");
return 0;
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
index eecd360..6d2221e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
@@ -116,7 +116,6 @@
#include <linux/module.h>
#include <linux/kmod.h>
-#include <linux/spinlock.h>
#include <linux/mdio.h>
#include <linux/phy.h>
#include <linux/of.h>
@@ -158,77 +157,6 @@ static int xgbe_mdio_write(struct mii_bus *mii, int prtad, int mmd_reg,
return 0;
}
-static void xgbe_adjust_link(struct net_device *netdev)
-{
- struct xgbe_prv_data *pdata = netdev_priv(netdev);
- struct xgbe_hw_if *hw_if = &pdata->hw_if;
- struct phy_device *phydev = pdata->phydev;
- int new_state = 0;
-
- if (phydev == NULL)
- return;
-
- DBGPR_MDIO("-->xgbe_adjust_link: address=%d, newlink=%d, curlink=%d\n",
- phydev->addr, phydev->link, pdata->phy_link);
-
- if (phydev->link) {
- /* Flow control support */
- if (pdata->pause_autoneg) {
- if (phydev->pause || phydev->asym_pause) {
- pdata->tx_pause = 1;
- pdata->rx_pause = 1;
- } else {
- pdata->tx_pause = 0;
- pdata->rx_pause = 0;
- }
- }
-
- if (pdata->tx_pause != pdata->phy_tx_pause) {
- hw_if->config_tx_flow_control(pdata);
- pdata->phy_tx_pause = pdata->tx_pause;
- }
-
- if (pdata->rx_pause != pdata->phy_rx_pause) {
- hw_if->config_rx_flow_control(pdata);
- pdata->phy_rx_pause = pdata->rx_pause;
- }
-
- /* Speed support */
- if (phydev->speed != pdata->phy_speed) {
- new_state = 1;
-
- switch (phydev->speed) {
- case SPEED_10000:
- hw_if->set_xgmii_speed(pdata);
- break;
-
- case SPEED_2500:
- hw_if->set_gmii_2500_speed(pdata);
- break;
-
- case SPEED_1000:
- hw_if->set_gmii_speed(pdata);
- break;
- }
- pdata->phy_speed = phydev->speed;
- }
-
- if (phydev->link != pdata->phy_link) {
- new_state = 1;
- pdata->phy_link = 1;
- }
- } else if (pdata->phy_link) {
- new_state = 1;
- pdata->phy_link = 0;
- pdata->phy_speed = SPEED_UNKNOWN;
- }
-
- if (new_state)
- phy_print_status(phydev);
-
- DBGPR_MDIO("<--xgbe_adjust_link\n");
-}
-
void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
{
struct device *dev = pdata->dev;
@@ -278,7 +206,6 @@ void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
int xgbe_mdio_register(struct xgbe_prv_data *pdata)
{
- struct net_device *netdev = pdata->netdev;
struct device_node *phy_node;
struct mii_bus *mii;
struct phy_device *phydev;
@@ -293,7 +220,6 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
return -EINVAL;
}
- /* Register with the MDIO bus */
mii = mdiobus_alloc();
if (mii == NULL) {
dev_err(pdata->dev, "mdiobus_alloc failed\n");
@@ -348,26 +274,6 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
pdata->mii = mii;
pdata->mdio_mmd = MDIO_MMD_PCS;
- pdata->phy_link = -1;
- pdata->phy_speed = SPEED_UNKNOWN;
- pdata->phy_tx_pause = pdata->tx_pause;
- pdata->phy_rx_pause = pdata->rx_pause;
-
- ret = phy_connect_direct(netdev, phydev, &xgbe_adjust_link,
- pdata->phy_mode);
- if (ret) {
- netdev_err(netdev, "phy_connect_direct failed\n");
- goto err_phy_device;
- }
-
- if (!phydev->drv || (phydev->drv->phy_id == 0)) {
- netdev_err(netdev, "phy_id not valid\n");
- ret = -ENODEV;
- goto err_phy_connect;
- }
- DBGPR(" phy_connect_direct succeeded for PHY %s, link=%d\n",
- dev_name(&phydev->dev), phydev->link);
-
phydev->autoneg = pdata->default_autoneg;
if (phydev->autoneg == AUTONEG_DISABLE) {
phydev->speed = pdata->default_speed;
@@ -386,9 +292,6 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
return 0;
-err_phy_connect:
- phy_disconnect(phydev);
-
err_phy_device:
phy_device_free(phydev);
@@ -408,7 +311,6 @@ void xgbe_mdio_unregister(struct xgbe_prv_data *pdata)
{
DBGPR("-->xgbe_mdio_unregister\n");
- phy_disconnect(pdata->phydev);
pdata->phydev = NULL;
module_put(pdata->phy_module);
--
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