mlx4: Paravirtualize Node Guids for slaves

This is necessary in order to support > 1 VF/PF in a VM for software
that uses the node guid as a discriminator, such as librdmacm.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 78fdbd653fa9..90774b7e47a4 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -696,6 +696,7 @@ static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
         struct ib_smp *outsmp = outbox->buf;
         __be16 *outtab = (__be16 *)(outsmp->data);
         __be32 slave_cap_mask;
+        __be64 slave_node_guid;
         port = vhcr->in_modifier;
 
         if (smp->base_version == 1 &&
@@ -755,6 +756,16 @@ static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
                                 }
                                 return err;
                         }
+                        if (smp->attr_id == IB_SMP_ATTR_NODE_INFO) {
+                                err = mlx4_cmd_box(dev, inbox->dma, outbox->dma,
+                                             vhcr->in_modifier, vhcr->op_modifier,
+                                             vhcr->op, MLX4_CMD_TIME_CLASS_C, MLX4_CMD_NATIVE);
+                                if (!err) {
+                                        slave_node_guid =  mlx4_get_slave_node_guid(dev, slave);
+                                        memcpy(outsmp->data + 12, &slave_node_guid, 8);
+                                }
+                                return err;
+                        }
                 }
         }
         if (slave != mlx4_master_func_num(dev) &&