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net: dsa: bcm_sf2: add support for Wake-on-LAN 

In order for Wake-on-LAN to work properly, we query the parent network
device Wake-on-LAN features and advertise those. Similarly, when
configuring Wake-on-LAN on a per-port network interface, we make sure
that we do not accept something the master network devices does not
support.

Finally, we need to maintain a bitmask of the ports enabled for
Wake-on-LAN to prevent the suspend() callback from disabling a port that
is used for waking up the system.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2014-09-18 17:31:25 -07:00 committed by David S. Miller
parent 19e57c4e6d
commit 96e65d7f3f
2 changed files with 61 additions and 0 deletions
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58
drivers/net/dsa/bcm_sf2.c
View File

@ -22,6 +22,7 @@
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <net/dsa.h>
#include <linux/ethtool.h>
#include "bcm_sf2.h"
#include "bcm_sf2_regs.h"
@ -242,6 +243,9 @@ static void bcm_sf2_port_disable(struct dsa_switch *ds, int port)
struct bcm_sf2_priv *priv = ds_to_priv(ds);
u32 off, reg;
if (priv->wol_ports_mask & (1 << port))
return;
if (dsa_is_cpu_port(ds, port))
off = CORE_IMP_CTL;
else
@ -689,6 +693,58 @@ static int bcm_sf2_sw_resume(struct dsa_switch *ds)
return 0;
}
static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
struct ethtool_wolinfo *wol)
{
struct net_device *p = ds->dst[ds->index].master_netdev;
struct bcm_sf2_priv *priv = ds_to_priv(ds);
struct ethtool_wolinfo pwol;
/* Get the parent device WoL settings */
p->ethtool_ops->get_wol(p, &pwol);
/* Advertise the parent device supported settings */
wol->supported = pwol.supported;
memset(&wol->sopass, 0, sizeof(wol->sopass));
if (pwol.wolopts & WAKE_MAGICSECURE)
memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass));
if (priv->wol_ports_mask & (1 << port))
wol->wolopts = pwol.wolopts;
else
wol->wolopts = 0;
}
static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
struct ethtool_wolinfo *wol)
{
struct net_device *p = ds->dst[ds->index].master_netdev;
struct bcm_sf2_priv *priv = ds_to_priv(ds);
s8 cpu_port = ds->dst[ds->index].cpu_port;
struct ethtool_wolinfo pwol;
p->ethtool_ops->get_wol(p, &pwol);
if (wol->wolopts & ~pwol.supported)
return -EINVAL;
if (wol->wolopts)
priv->wol_ports_mask |= (1 << port);
else
priv->wol_ports_mask &= ~(1 << port);
/* If we have at least one port enabled, make sure the CPU port
* is also enabled. If the CPU port is the last one enabled, we disable
* it since this configuration does not make sense.
*/
if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port))
priv->wol_ports_mask |= (1 << cpu_port);
else
priv->wol_ports_mask &= ~(1 << cpu_port);
return p->ethtool_ops->set_wol(p, wol);
}
static struct dsa_switch_driver bcm_sf2_switch_driver = {
.tag_protocol = DSA_TAG_PROTO_BRCM,
.priv_size = sizeof(struct bcm_sf2_priv),
@ -705,6 +761,8 @@ static struct dsa_switch_driver bcm_sf2_switch_driver = {
.fixed_link_update = bcm_sf2_sw_fixed_link_update,
.suspend = bcm_sf2_sw_suspend,
.resume = bcm_sf2_sw_resume,
.get_wol = bcm_sf2_sw_get_wol,
.set_wol = bcm_sf2_sw_set_wol,
};
static int __init bcm_sf2_init(void)

3
drivers/net/dsa/bcm_sf2.h
View File

@ -70,6 +70,9 @@ struct bcm_sf2_priv {
struct bcm_sf2_hw_params hw_params;
struct bcm_sf2_port_status port_sts[DSA_MAX_PORTS];
/* Mask of ports enabled for Wake-on-LAN */
u32 wol_ports_mask;
};
struct bcm_sf2_hw_stats {