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net: expose eth_is_active() function to test network device state

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The previous eth_device struct returned by eth_get_dev() allowed
code to directly query the state member field. However, with
CONFIG_DM_ETH this data gets encapsulated (i.e. private), and
eth_get_dev() returns a udevice struct 'abstraction' instead.

This breaks legacy code relying on the former behaviour - e.g.
netconsole.
(see http://lists.denx.de/pipermail/u-boot/2015-June/216528.html)

The patch introduces a method to retrieve the ethernet device
state in a 'clean' and uniform way, supporting both legacy code
and driver model. The new function eth_is_active() accepts a
device struct pointer and tests it for ETH_STATE_ACTIVE.

Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Bernhard Nortmann 2015-09-14 15:29:43 +02:00 committed by Joe Hershberger
parent 26d3acdab8
commit eaa8a195cc
2 changed files with 21 additions and 1 deletions
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4
include/net.h
View file

@ -149,7 +149,9 @@ struct udevice *eth_get_dev(void); /* get the current device */
*/
struct udevice *eth_get_dev_by_name(const char *devname);
unsigned char *eth_get_ethaddr(void); /* get the current device MAC */
/* Used only when NetConsole is enabled */
int eth_is_active(struct udevice *dev); /* Test device for active state */
int eth_init_state_only(void); /* Set active state */
void eth_halt_state_only(void); /* Set passive state */
#endif
@ -195,6 +197,8 @@ static inline unsigned char *eth_get_ethaddr(void)
return NULL;
}
/* Used only when NetConsole is enabled */
int eth_is_active(struct eth_device *dev); /* Test device for active state */
/* Set active state */
static inline __attribute__((always_inline)) int eth_init_state_only(void)
{

18
net/eth.c
View file

@ -389,6 +389,17 @@ void eth_halt(void)
priv->state = ETH_STATE_PASSIVE;
}
int eth_is_active(struct udevice *dev)
{
struct eth_device_priv *priv;
if (!dev || !device_active(dev))
return 0;
priv = dev_get_uclass_priv(dev);
return priv->state == ETH_STATE_ACTIVE;
}
int eth_send(void *packet, int length)
{
struct udevice *current;
@ -580,7 +591,7 @@ UCLASS_DRIVER(eth) = {
.per_device_auto_alloc_size = sizeof(struct eth_device_priv),
.flags = DM_UC_FLAG_SEQ_ALIAS,
};
#endif
#endif /* #ifdef CONFIG_DM_ETH */
#ifndef CONFIG_DM_ETH
@ -918,6 +929,11 @@ void eth_halt(void)
eth_current->state = ETH_STATE_PASSIVE;
}
int eth_is_active(struct eth_device *dev)
{
return dev && dev->state == ETH_STATE_ACTIVE;
}
int eth_send(void *packet, int length)
{
if (!eth_current)