mlx4_core: Add IB port-state machine and port mgmt event propagation

For an IB port, a slave should not show port active until that slave
has a valid alias-guid (provided by the subnet manager).  Therefore
the port-up event should be passed to a slave only after both the port
is up, and the slave's alias-guid has been set.

Also, provide the infrastructure for propagating port-management
events (client-reregister, etc) to slaves.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 9803fd5d3dba..380e01671d1e 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -192,6 +192,25 @@ enum {
         MLX4_FATAL_WARNING_SUBTYPE_WARMING = 0,
 };
 
+enum slave_port_state {
+        SLAVE_PORT_DOWN = 0,
+        SLAVE_PENDING_UP,
+        SLAVE_PORT_UP,
+};
+
+enum slave_port_gen_event {
+        SLAVE_PORT_GEN_EVENT_DOWN = 0,
+        SLAVE_PORT_GEN_EVENT_UP,
+        SLAVE_PORT_GEN_EVENT_NONE,
+};
+
+enum slave_port_state_event {
+        MLX4_PORT_STATE_DEV_EVENT_PORT_DOWN,
+        MLX4_PORT_STATE_DEV_EVENT_PORT_UP,
+        MLX4_PORT_STATE_IB_PORT_STATE_EVENT_GID_VALID,
+        MLX4_PORT_STATE_IB_EVENT_GID_INVALID,
+};
+
 enum {
         MLX4_PERM_LOCAL_READ    = 1 << 10,
         MLX4_PERM_LOCAL_WRITE   = 1 << 11,
@@ -945,4 +964,13 @@ void mlx4_sync_pkey_table(struct mlx4_dev *dev, int slave, int port,
 
 int mlx4_get_parav_qkey(struct mlx4_dev *dev, u32 qpn, u32 *qkey);
 
+int mlx4_is_slave_active(struct mlx4_dev *dev, int slave);
+int mlx4_gen_pkey_eqe(struct mlx4_dev *dev, int slave, u8 port);
+int mlx4_gen_guid_change_eqe(struct mlx4_dev *dev, int slave, u8 port);
+int mlx4_gen_slaves_port_mgt_ev(struct mlx4_dev *dev, u8 port, int attr);
+int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port, u8 port_subtype_change);
+enum slave_port_state mlx4_get_slave_port_state(struct mlx4_dev *dev, int slave, u8 port);
+int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave, u8 port, int event, enum slave_port_gen_event *gen_event);
+
+
 #endif /* MLX4_DEVICE_H */