IB/mlx4: Initialize SR-IOV IB support for slaves in master context

Allocate SR-IOV paravirtualization resources and MAD demuxing contexts
on the master.

This has two parts.  The first part is to initialize the structures to
contain the contexts.  This is done at master startup time in
mlx4_ib_init_sriov().

The second part is to actually create the tunneling resources required
on the master to support a slave.  This is performed the master
detects that a slave has started up (MLX4_DEV_EVENT_SLAVE_INIT event
generated when a slave initializes its comm channel).

For the master, there is no such startup event, so it creates its own
tunneling resources when it starts up.  In addition, the master also
creates the real special QPs.  The ib_core layer on the master causes
creation of proxy special QPs, since the master is also
paravirtualized at the ib_core layer.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index c8fef435302..cb9bebe2827 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -1340,6 +1340,8 @@ static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
                 if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd)
                         goto inform_slave_state;
 
+                mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_SHUTDOWN, slave);
+
                 /* write the version in the event field */
                 reply |= mlx4_comm_get_version();
 
@@ -1376,6 +1378,7 @@ static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
                         goto reset_slave;
                 slave_state[slave].vhcr_dma |= param;
                 slave_state[slave].active = true;
+                mlx4_dispatch_event(dev, MLX4_DEV_EVENT_SLAVE_INIT, slave);
                 break;
         case MLX4_COMM_CMD_VHCR_POST:
                 if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&