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authorGavin Shan <gwshan@linux.vnet.ibm.com>2016-07-19 11:54:19 +1000
committerDavid S. Miller <davem@davemloft.net>2016-07-19 20:49:17 -0700
commite6f44ed6d04d3185dcd8e8e98af8742d87bdffcc (patch)
tree23f27bdac3262327102758adbded3886a209ba7b /include/net
parent138635cc27c9737f940c3aa80912ff7a61c825af (diff)
downloadlwn-e6f44ed6d04d3185dcd8e8e98af8742d87bdffcc.tar.gz
lwn-e6f44ed6d04d3185dcd8e8e98af8742d87bdffcc.zip
net/ncsi: Package and channel management
This manages NCSI packages and channels: * The available packages and channels are enumerated in the first time of calling ncsi_start_dev(). The channels' capabilities are probed in the meanwhile. The NCSI network topology won't change until the NCSI device is destroyed. * There in a queue in every NCSI device. The element in the queue, channel, is waiting for configuration (bringup) or suspending (teardown). The channel's state (inactive/active) indicates the futher action (configuration or suspending) will be applied on the channel. Another channel's state (invisible) means the requested action is being applied. * The hardware arbitration will be enabled if all available packages and channels support it. All available channels try to provide service when hardware arbitration is enabled. Otherwise, one channel is selected as the active one at once. * When channel is in active state, meaning it's providing service, a timer started to retrieve the channe's link status. If the channel's link status fails to be updated in the determined period, the channel is going to be reconfigured. It's the error handling implementation as defined in NCSI spec. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/ncsi.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/ncsi.h b/include/net/ncsi.h
index 70d14ee1ef84..1dbf42f79750 100644
--- a/include/net/ncsi.h
+++ b/include/net/ncsi.h
@@ -30,6 +30,7 @@ struct ncsi_dev {
#ifdef CONFIG_NET_NCSI
struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
void (*notifier)(struct ncsi_dev *nd));
+int ncsi_start_dev(struct ncsi_dev *nd);
void ncsi_unregister_dev(struct ncsi_dev *nd);
#else /* !CONFIG_NET_NCSI */
static inline struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
@@ -38,6 +39,11 @@ static inline struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
return NULL;
}
+static inline int ncsi_start_dev(struct ncsi_dev *nd)
+{
+ return -ENOTTY;
+}
+
static inline void ncsi_unregister_dev(struct ncsi_dev *nd)
{
}