mlx4_core: For RoCE, allow slaves to set the GID entry at that slave's index

[cascardo/linux.git] / drivers / net / ethernet / mellanox / mlx4 / port.c

diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c
index a58bcbf..591740b 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/port.c
@@ -505,6 +505,7 @@ int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
        mlx4_free_cmd_mailbox(dev, outmailbox);
        return err;
 }
+static struct mlx4_roce_gid_entry zgid_entry;
 
 static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
                                u8 op_mod, struct mlx4_cmd_mailbox *inbox)
@@ -515,6 +516,7 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
        struct mlx4_slave_state *slave_st = &master->slave_state[slave];
        struct mlx4_set_port_rqp_calc_context *qpn_context;
        struct mlx4_set_port_general_context *gen_context;
+       struct mlx4_roce_gid_entry *gid_entry;
        int reset_qkey_viols;
        int port;
        int is_eth;
@@ -535,7 +537,8 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
        /* Slaves cannot perform SET_PORT operations except changing MTU */
        if (is_eth) {
                if (slave != dev->caps.function &&
-                   in_modifier != MLX4_SET_PORT_GENERAL) {
+                   in_modifier != MLX4_SET_PORT_GENERAL &&
+                   in_modifier != MLX4_SET_PORT_GID_TABLE) {
                        mlx4_warn(dev, "denying SET_PORT for slave:%d\n",
                                        slave);
                        return -EINVAL;
@@ -581,6 +584,28 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
 
                        gen_context->mtu = cpu_to_be16(master->max_mtu[port]);
                        break;
+               case MLX4_SET_PORT_GID_TABLE:
+                       gid_entry = (struct mlx4_roce_gid_entry *)(inbox->buf);
+                       /* check that do not have duplicates */
+                       if (memcmp(gid_entry->raw, zgid_entry.raw, 16)) {
+                               for (i = 0; i < MLX4_ROCE_MAX_GIDS; i++) {
+                                       if (slave != i &&
+                                           !memcmp(gid_entry->raw, priv->roce_gids[port - 1][i].raw, 16)) {
+                                               mlx4_warn(dev, "requested gid entry for slave:%d "
+                                                         "is a duplicate of slave %d\n",
+                                                         slave, i);
+                                               return -EEXIST;
+                                       }
+                               }
+                       }
+                       /* insert slave GID at proper index */
+                       memcpy(priv->roce_gids[port - 1][slave].raw, gid_entry->raw, 16);
+                       /* rewrite roce port gids table to FW */
+                       for (i = 0; i < MLX4_ROCE_MAX_GIDS; i++) {
+                               memcpy(gid_entry->raw, priv->roce_gids[port - 1][i].raw, 16);
+                               gid_entry++;
+                       }
+                       break;
                }
                return mlx4_cmd(dev, inbox->dma, in_mod, op_mod,
                                MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
@@ -927,3 +952,39 @@ void mlx4_set_stats_bitmap(struct mlx4_dev *dev, u64 *stats_bitmap)
                *stats_bitmap |= MLX4_STATS_ERROR_COUNTERS_MASK;
 }
 EXPORT_SYMBOL(mlx4_set_stats_bitmap);
+
+int mlx4_get_slave_from_roce_gid(struct mlx4_dev *dev, int port, u8 *gid,
+                                int *slave_id)
+{
+       struct mlx4_priv *priv = mlx4_priv(dev);
+       int i, found_ix = -1;
+
+       if (!mlx4_is_mfunc(dev))
+               return -EINVAL;
+
+       for (i = 0; i < MLX4_ROCE_MAX_GIDS; i++) {
+               if (!memcmp(priv->roce_gids[port - 1][i].raw, gid, 16)) {
+                       found_ix = i;
+                       break;
+               }
+       }
+
+       if (found_ix >= 0)
+               *slave_id = found_ix;
+
+       return (found_ix >= 0) ? 0 : -EINVAL;
+}
+EXPORT_SYMBOL(mlx4_get_slave_from_roce_gid);
+
+int mlx4_get_roce_gid_from_slave(struct mlx4_dev *dev, int port, int slave_id,
+                                u8 *gid)
+{
+       struct mlx4_priv *priv = mlx4_priv(dev);
+
+       if (!mlx4_is_master(dev))
+               return -EINVAL;
+
+       memcpy(gid, priv->roce_gids[port - 1][slave_id].raw, 16);
+       return 0;
+}
+EXPORT_SYMBOL(mlx4_get_roce_gid_from_slave);