devlink: add shared buffer configuration

Define userspace API and drivers API for configuration of shared
buffers. Four basic objects are defined:
shared buffer - attributes are size, number of pools and TCs
pool - chunk of sharedbuffer definition, it has some size and either
       static or dynamic threshold
port pool threshold - to set per-port threshold for each pool
port tc threshold bind - to bind port and TC to specified pool
                         with threshold.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 47 insertions, 0 deletions

diff --git a/include/net/devlink.h b/include/net/devlink.h
index c37d257891d6..e4c27473ee4f 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -24,6 +24,7 @@ struct devlink_ops;
 struct devlink {
 	struct list_head list;
 	struct list_head port_list;
+	struct list_head sb_list;
 	const struct devlink_ops *ops;
 	struct device *dev;
 	possible_net_t _net;
@@ -42,6 +43,12 @@ struct devlink_port {
 	u32 split_group;
 };
 
+struct devlink_sb_pool_info {
+	enum devlink_sb_pool_type pool_type;
+	u32 size;
+	enum devlink_sb_threshold_type threshold_type;
+};
+
 struct devlink_ops {
 	size_t priv_size;
 	int (*port_type_set)(struct devlink_port *devlink_port,
@@ -49,6 +56,28 @@ struct devlink_ops {
 	int (*port_split)(struct devlink *devlink, unsigned int port_index,
 			  unsigned int count);
 	int (*port_unsplit)(struct devlink *devlink, unsigned int port_index);
+	int (*sb_pool_get)(struct devlink *devlink, unsigned int sb_index,
+			   u16 pool_index,
+			   struct devlink_sb_pool_info *pool_info);
+	int (*sb_pool_set)(struct devlink *devlink, unsigned int sb_index,
+			   u16 pool_index, u32 size,
+			   enum devlink_sb_threshold_type threshold_type);
+	int (*sb_port_pool_get)(struct devlink_port *devlink_port,
+				unsigned int sb_index, u16 pool_index,
+				u32 *p_threshold);
+	int (*sb_port_pool_set)(struct devlink_port *devlink_port,
+				unsigned int sb_index, u16 pool_index,
+				u32 threshold);
+	int (*sb_tc_pool_bind_get)(struct devlink_port *devlink_port,
+				   unsigned int sb_index,
+				   u16 tc_index,
+				   enum devlink_sb_pool_type pool_type,
+				   u16 *p_pool_index, u32 *p_threshold);
+	int (*sb_tc_pool_bind_set)(struct devlink_port *devlink_port,
+				   unsigned int sb_index,
+				   u16 tc_index,
+				   enum devlink_sb_pool_type pool_type,
+				   u16 pool_index, u32 threshold);
 };
 
 static inline void *devlink_priv(struct devlink *devlink)
@@ -82,6 +111,11 @@ void devlink_port_type_ib_set(struct devlink_port *devlink_port,
 void devlink_port_type_clear(struct devlink_port *devlink_port);
 void devlink_port_split_set(struct devlink_port *devlink_port,
 			    u32 split_group);
+int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
+			u32 size, u16 ingress_pools_count,
+			u16 egress_pools_count, u16 ingress_tc_count,
+			u16 egress_tc_count);
+void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index);
 
 #else
 
@@ -135,6 +169,19 @@ static inline void devlink_port_split_set(struct devlink_port *devlink_port,
 {
 }
 
+static inline int devlink_sb_register(struct devlink *devlink,
+				      unsigned int sb_index, u32 size,
+				      u16 ingress_pools_count,
+				      u16 egress_pools_count, u16 tc_count)
+{
+	return 0;
+}
+
+static inline void devlink_sb_unregister(struct devlink *devlink,
+					 unsigned int sb_index)
+{
+}
+
 #endif
 
 #endif /* _NET_DEVLINK_H_ */