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net: dsa: microchip: add port_cleanup function 

Add port_cleanup function to reset some device variables when the port is
disabled.  Add a mutex to make sure changing those variables is
thread-safe.

Signed-off-by: Tristram Ha <Tristram.Ha@microchip.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tristram Ha 2019-02-22 16:36:51 -08:00 committed by David S. Miller
parent 6ca5081526
commit 7049f9b5d0
4 changed files with 31 additions and 0 deletions
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6
drivers/net/dsa/microchip/ksz9477.c
View File

@ -450,12 +450,14 @@ static void ksz9477_port_stp_state_set(struct dsa_switch *ds, int port,
break;
member = dev->host_mask | p->vid_member;
mutex_lock(&dev->dev_mutex);
/* Port is a member of a bridge. */
if (dev->br_member & (1 << port)) {
dev->member |= (1 << port);
member = dev->member;
}
mutex_unlock(&dev->dev_mutex);
break;
case BR_STATE_BLOCKING:
data |= PORT_LEARN_DISABLE;
@ -470,6 +472,7 @@ static void ksz9477_port_stp_state_set(struct dsa_switch *ds, int port,
ksz_pwrite8(dev, port, P_STP_CTRL, data);
p->stp_state = state;
mutex_lock(&dev->dev_mutex);
if (data & PORT_RX_ENABLE)
dev->rx_ports |= (1 << port);
else
@ -494,6 +497,7 @@ static void ksz9477_port_stp_state_set(struct dsa_switch *ds, int port,
*/
if (forward != dev->member)
ksz_update_port_member(dev, port);
mutex_unlock(&dev->dev_mutex);
}
static void ksz9477_flush_dyn_mac_table(struct ksz_device *dev, int port)
@ -1080,6 +1084,7 @@ static void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
ksz_pwrite8(dev, port, REG_PORT_XMII_CTRL_1, data8);
p->phydev.duplex = 1;
}
mutex_lock(&dev->dev_mutex);
if (cpu_port) {
member = dev->port_mask;
dev->on_ports = dev->host_mask;
@ -1092,6 +1097,7 @@ static void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
if (p->phydev.link)
dev->live_ports |= (1 << port);
}
mutex_unlock(&dev->dev_mutex);
ksz9477_cfg_port_member(dev, port, member);
/* clear pending interrupts */

22
drivers/net/dsa/microchip/ksz_common.c
View File

@ -20,6 +20,16 @@
#include "ksz_priv.h"
void ksz_port_cleanup(struct ksz_device *dev, int port)
{
/* Common code for port cleanup. */
mutex_lock(&dev->dev_mutex);
dev->on_ports &= ~(1 << port);
dev->live_ports &= ~(1 << port);
mutex_unlock(&dev->dev_mutex);
}
EXPORT_SYMBOL_GPL(ksz_port_cleanup);
void ksz_update_port_member(struct ksz_device *dev, int port)
{
struct ksz_port *p;
@ -151,6 +161,13 @@ void ksz_adjust_link(struct dsa_switch *ds, int port,
p->read = true;
schedule_work(&dev->mib_read);
}
mutex_lock(&dev->dev_mutex);
if (!phydev->link)
dev->live_ports &= ~(1 << port);
else
/* Remember which port is connected and active. */
dev->live_ports |= (1 << port) & dev->on_ports;
mutex_unlock(&dev->dev_mutex);
}
EXPORT_SYMBOL_GPL(ksz_adjust_link);
@ -188,7 +205,9 @@ int ksz_port_bridge_join(struct dsa_switch *ds, int port,
{
struct ksz_device *dev = ds->priv;
mutex_lock(&dev->dev_mutex);
dev->br_member |= (1 << port);
mutex_unlock(&dev->dev_mutex);
/* port_stp_state_set() will be called after to put the port in
* appropriate state so there is no need to do anything.
@ -203,8 +222,10 @@ void ksz_port_bridge_leave(struct dsa_switch *ds, int port,
{
struct ksz_device *dev = ds->priv;
mutex_lock(&dev->dev_mutex);
dev->br_member &= ~(1 << port);
dev->member &= ~(1 << port);
mutex_unlock(&dev->dev_mutex);
/* port_stp_state_set() will be called after to put the port in
* forwarding state so there is no need to do anything.
@ -417,6 +438,7 @@ int ksz_switch_register(struct ksz_device *dev,
gpiod_set_value(dev->reset_gpio, 0);
}
mutex_init(&dev->dev_mutex);
mutex_init(&dev->reg_mutex);
mutex_init(&dev->stats_mutex);
mutex_init(&dev->alu_mutex);

1
drivers/net/dsa/microchip/ksz_common.h
View File

@ -7,6 +7,7 @@
#ifndef __KSZ_COMMON_H
#define __KSZ_COMMON_H
void ksz_port_cleanup(struct ksz_device *dev, int port);
void ksz_update_port_member(struct ksz_device *dev, int port);
void ksz_init_mib_timer(struct ksz_device *dev);

2
drivers/net/dsa/microchip/ksz_priv.h
View File

@ -48,6 +48,7 @@ struct ksz_device {
struct ksz_platform_data *pdata;
const char *name;
struct mutex dev_mutex; /* device access */
struct mutex reg_mutex; /* register access */
struct mutex stats_mutex; /* status access */
struct mutex alu_mutex; /* ALU access */
@ -137,6 +138,7 @@ struct ksz_dev_ops {
void (*flush_dyn_mac_table)(struct ksz_device *dev, int port);
void (*phy_setup)(struct ksz_device *dev, int port,
struct phy_device *phy);
void (*port_cleanup)(struct ksz_device *dev, int port);
void (*port_setup)(struct ksz_device *dev, int port, bool cpu_port);
void (*r_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
void (*w_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 val);