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Commit 7f4e568d authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'dsa-remove-set_addr' 



Vivien Didelot says:

====================
net: dsa: remove .set_addr

An Ethernet switch may support having a MAC address, which can be used
as the switch's source address in transmitted full-duplex Pause frames.

If a DSA switch supports the related .set_addr operation, the DSA core
sets the master's MAC address on the switch.

This won't make sense anymore in a multi-CPU ports system, because there
won't be a unique master device assigned to a switch tree.

Moreover this operation is confusing because it makes the user think
that it could be used to program the switch with the MAC address of the
CPU/management port such that MAC address learning can be disabled on
said port, but in fact, that's not how it is currently used.

To fix this, assign a random MAC address at setup time in the mv88e6060
and mv88e6xxx drivers before removing .set_addr completely from DSA.

Changes in v3:
  - include fix for mv88e6060 switch MAC address setter.

Changes in v2:
  - remove .set_addr implementation from drivers and use a random MAC.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents ec0d0987 841f4f24

drivers/net/dsa/dsa_loop.c

+0 −8
Original line number Diff line number Diff line
@@ -110,13 +110,6 @@ static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port, 
		data[i] = ps->ports[port].mib[i].val;

}



static int dsa_loop_set_addr(struct dsa_switch *ds, u8 *addr)

{

	dev_dbg(ds->dev, "%s\n", __func__);



	return 0;

}



static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)

{

	struct dsa_loop_priv *ps = ds->priv;
@@ -263,7 +256,6 @@ static const struct dsa_switch_ops dsa_loop_driver = { 
	.get_strings		= dsa_loop_get_strings,

	.get_ethtool_stats	= dsa_loop_get_ethtool_stats,

	.get_sset_count		= dsa_loop_get_sset_count,

	.set_addr		= dsa_loop_set_addr,

	.phy_read		= dsa_loop_phy_read,

	.phy_write		= dsa_loop_phy_write,

	.port_bridge_join	= dsa_loop_port_bridge_join,

drivers/net/dsa/mv88e6060.c

+26 −11
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
 */



#include <linux/delay.h>

#include <linux/etherdevice.h>

#include <linux/jiffies.h>

#include <linux/list.h>

#include <linux/module.h>
@@ -188,6 +189,27 @@ static int mv88e6060_setup_port(struct dsa_switch *ds, int p) 
	return 0;

}



static int mv88e6060_setup_addr(struct dsa_switch *ds)

{

	u8 addr[ETH_ALEN];

	u16 val;



	eth_random_addr(addr);



	val = addr[0] << 8 | addr[1];



	/* The multicast bit is always transmitted as a zero, so the switch uses

	 * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA.

	 */

	val &= 0xfeff;



	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, val);

	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]);

	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]);



	return 0;

}



static int mv88e6060_setup(struct dsa_switch *ds)

{

	int ret;
@@ -203,6 +225,10 @@ static int mv88e6060_setup(struct dsa_switch *ds) 
	if (ret < 0)

		return ret;



	ret = mv88e6060_setup_addr(ds);

	if (ret < 0)

		return ret;



	for (i = 0; i < MV88E6060_PORTS; i++) {

		ret = mv88e6060_setup_port(ds, i);

		if (ret < 0)
@@ -212,16 +238,6 @@ static int mv88e6060_setup(struct dsa_switch *ds) 
	return 0;

}



static int mv88e6060_set_addr(struct dsa_switch *ds, u8 *addr)

{

	/* Use the same MAC Address as FD Pause frames for all ports */

	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, (addr[0] << 9) | addr[1]);

	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]);

	REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]);



	return 0;

}



static int mv88e6060_port_to_phy_addr(int port)

{

	if (port >= 0 && port < MV88E6060_PORTS)
@@ -256,7 +272,6 @@ static const struct dsa_switch_ops mv88e6060_switch_ops = { 
	.get_tag_protocol = mv88e6060_get_tag_protocol,

	.probe		= mv88e6060_drv_probe,

	.setup		= mv88e6060_setup,

	.set_addr	= mv88e6060_set_addr,

	.phy_read	= mv88e6060_phy_read,

	.phy_write	= mv88e6060_phy_write,

};

drivers/net/dsa/mv88e6xxx/chip.c

+17 −16
Original line number Diff line number Diff line
@@ -932,6 +932,19 @@ static int mv88e6xxx_irl_setup(struct mv88e6xxx_chip *chip) 
	return 0;

}



static int mv88e6xxx_mac_setup(struct mv88e6xxx_chip *chip)

{

	if (chip->info->ops->set_switch_mac) {

		u8 addr[ETH_ALEN];



		eth_random_addr(addr);



		return chip->info->ops->set_switch_mac(chip, addr);

	}



	return 0;

}



static int mv88e6xxx_pvt_map(struct mv88e6xxx_chip *chip, int dev, int port)

{

	u16 pvlan = 0;
@@ -2013,6 +2026,10 @@ static int mv88e6xxx_setup(struct dsa_switch *ds) 
	if (err)

		goto unlock;



	err = mv88e6xxx_mac_setup(chip);

	if (err)

		goto unlock;



	err = mv88e6xxx_phy_setup(chip);

	if (err)

		goto unlock;
@@ -2043,21 +2060,6 @@ static int mv88e6xxx_setup(struct dsa_switch *ds) 
	return err;

}



static int mv88e6xxx_set_addr(struct dsa_switch *ds, u8 *addr)

{

	struct mv88e6xxx_chip *chip = ds->priv;

	int err;



	if (!chip->info->ops->set_switch_mac)

		return -EOPNOTSUPP;



	mutex_lock(&chip->reg_lock);

	err = chip->info->ops->set_switch_mac(chip, addr);

	mutex_unlock(&chip->reg_lock);



	return err;

}



static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)

{

	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
@@ -3785,7 +3787,6 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = { 
	.probe			= mv88e6xxx_drv_probe,

	.get_tag_protocol	= mv88e6xxx_get_tag_protocol,

	.setup			= mv88e6xxx_setup,

	.set_addr		= mv88e6xxx_set_addr,

	.adjust_link		= mv88e6xxx_adjust_link,

	.get_strings		= mv88e6xxx_get_strings,

	.get_ethtool_stats	= mv88e6xxx_get_ethtool_stats,

include/net/dsa.h

+0 −1
Original line number Diff line number Diff line
@@ -291,7 +291,6 @@ struct dsa_switch_ops { 
	enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds);



	int	(*setup)(struct dsa_switch *ds);

	int	(*set_addr)(struct dsa_switch *ds, u8 *addr);

	u32	(*get_phy_flags)(struct dsa_switch *ds, int port);



	/*

net/dsa/dsa2.c

+0 −6
Original line number Diff line number Diff line
@@ -336,12 +336,6 @@ static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds) 
	if (err)

		return err;



	if (ds->ops->set_addr) {

		err = ds->ops->set_addr(ds, dst->cpu_dp->netdev->dev_addr);

		if (err < 0)

			return err;

	}



	if (!ds->slave_mii_bus && ds->ops->phy_read) {

		ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);

		if (!ds->slave_mii_bus)