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authorGavin Shan <gwshan@linux.vnet.ibm.com>2016-07-19 11:54:16 +1000
committerDavid S. Miller <davem@davemloft.net>2016-07-19 20:49:16 -0700
commit2d283bdd079c0ad4da020bbc9e9c2a4280823098 (patch)
tree43c0b7f25a2ac0684448dfd776ef56358332254e /include/net/ncsi.h
parent5e31c7019f08e85d5c285befe30620f7291b4ad3 (diff)
downloadlinux-2d283bdd079c0ad4da020bbc9e9c2a4280823098.tar.bz2
net/ncsi: Resource management
NCSI spec (DSP0222) defines several objects: package, channel, mode, filter, version and statistics etc. This introduces the data structs to represent those objects and implement functions to manage them. Also, this introduces CONFIG_NET_NCSI for the newly implemented NCSI stack. * The user (e.g. netdev driver) dereference NCSI device by "struct ncsi_dev", which is embedded to "struct ncsi_dev_priv". The later one is used by NCSI stack internally. * Every NCSI device can have multiple packages simultaneously, up to 8 packages. It's represented by "struct ncsi_package" and identified by 3-bits ID. * Every NCSI package can have multiple channels, up to 32. It's represented by "struct ncsi_channel" and identified by 5-bits ID. * Every NCSI channel has version, statistics, various modes and filters. They are represented by "struct ncsi_channel_version", "struct ncsi_channel_stats", "struct ncsi_channel_mode" and "struct ncsi_channel_filter" separately. * Apart from AEN (Asynchronous Event Notification), the NCSI stack works in terms of command and response. This introduces "struct ncsi_req" to represent a complete NCSI transaction made of NCSI request and response. link: https://www.dmtf.org/sites/default/files/standards/documents/DSP0222_1.1.0.pdf 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/ncsi.h')
-rw-r--r--include/net/ncsi.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/include/net/ncsi.h b/include/net/ncsi.h
new file mode 100644
index 000000000000..70d14ee1ef84
--- /dev/null
+++ b/include/net/ncsi.h
@@ -0,0 +1,46 @@
+#ifndef __NET_NCSI_H
+#define __NET_NCSI_H
+
+/*
+ * The NCSI device states seen from external. More NCSI device states are
+ * only visible internally (in net/ncsi/internal.h). When the NCSI device
+ * is registered, it's in ncsi_dev_state_registered state. The state
+ * ncsi_dev_state_start is used to drive to choose active package and
+ * channel. After that, its state is changed to ncsi_dev_state_functional.
+ *
+ * The state ncsi_dev_state_stop helps to shut down the currently active
+ * package and channel while ncsi_dev_state_config helps to reconfigure
+ * them.
+ */
+enum {
+ ncsi_dev_state_registered = 0x0000,
+ ncsi_dev_state_functional = 0x0100,
+ ncsi_dev_state_probe = 0x0200,
+ ncsi_dev_state_config = 0x0300,
+ ncsi_dev_state_suspend = 0x0400,
+};
+
+struct ncsi_dev {
+ int state;
+ int link_up;
+ struct net_device *dev;
+ void (*handler)(struct ncsi_dev *ndev);
+};
+
+#ifdef CONFIG_NET_NCSI
+struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
+ void (*notifier)(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,
+ void (*notifier)(struct ncsi_dev *nd))
+{
+ return NULL;
+}
+
+static inline void ncsi_unregister_dev(struct ncsi_dev *nd)
+{
+}
+#endif /* CONFIG_NET_NCSI */
+
+#endif /* __NET_NCSI_H */