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>

diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index b91b486..603a114 100644 (file)
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -35,6 +35,7 @@
 #include <rdma/ib_sa.h>
 #include <rdma/ib_cache.h>
 
+#include <linux/random.h>
 #include <linux/mlx4/cmd.h>
 #include <linux/gfp.h>
 #include <rdma/ib_pma.h>
@@ -89,6 +90,12 @@ static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num);
 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
                                int block, u32 change_bitmap);
 
+__be64 mlx4_ib_gen_node_guid(void)
+{
+#define NODE_GUID_HI   ((u64) (((u64)IB_OPENIB_OUI) << 40))
+       return cpu_to_be64(NODE_GUID_HI | random32());
+}
+
 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx)
 {
        return cpu_to_be64(atomic_inc_return(&ctx->tid)) |
@@ -1962,6 +1969,13 @@ int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
                return 0;
        }
 
+       for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
+               if (i == mlx4_master_func_num(dev->dev))
+                       mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
+               else
+                       mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
+       }
+
        err = mlx4_ib_init_alias_guid_service(dev);
        if (err) {
                mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");

diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index e57a220..e04cbc9 100644 (file)
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -723,4 +723,7 @@ int mlx4_ib_device_register_sysfs(struct mlx4_ib_dev *device) ;
 
 void mlx4_ib_device_unregister_sysfs(struct mlx4_ib_dev *device);
 
+__be64 mlx4_ib_gen_node_guid(void);
+
+
 #endif /* MLX4_IB_H */

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 78fdbd6..90774b7 100644 (file)
--- 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) &&

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 2294b71..76f69fd 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -435,6 +435,28 @@ void mlx4_sync_pkey_table(struct mlx4_dev *dev, int slave, int port, int i, int
 }
 EXPORT_SYMBOL(mlx4_sync_pkey_table);
 
+void mlx4_put_slave_node_guid(struct mlx4_dev *dev, int slave, __be64 guid)
+{
+       struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);
+
+       if (!mlx4_is_master(dev))
+               return;
+
+       priv->slave_node_guids[slave] = guid;
+}
+EXPORT_SYMBOL(mlx4_put_slave_node_guid);
+
+__be64 mlx4_get_slave_node_guid(struct mlx4_dev *dev, int slave)
+{
+       struct mlx4_priv *priv = container_of(dev, struct mlx4_priv, dev);
+
+       if (!mlx4_is_master(dev))
+               return 0;
+
+       return priv->slave_node_guids[slave];
+}
+EXPORT_SYMBOL(mlx4_get_slave_node_guid);
+
 int mlx4_is_slave_active(struct mlx4_dev *dev, int slave)
 {
        struct mlx4_priv *priv = mlx4_priv(dev);

diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 399793a..4b1fbd8 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -810,6 +810,7 @@ struct mlx4_priv {
        int                     reserved_mtts;
        int                     fs_hash_mode;
        u8 virt2phys_pkey[MLX4_MFUNC_MAX][MLX4_MAX_PORTS][MLX4_MAX_PORT_PKEYS];
+       __be64                  slave_node_guids[MLX4_MFUNC_MAX];
 
 };
 

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 9b243df..c0f8f74 100644 (file)
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -981,5 +981,7 @@ int mlx4_gen_port_state_change_eqe(struct mlx4_dev *dev, int slave, u8 port, u8
 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);
 
+void mlx4_put_slave_node_guid(struct mlx4_dev *dev, int slave, __be64 guid);
+__be64 mlx4_get_slave_node_guid(struct mlx4_dev *dev, int slave);
 
 #endif /* MLX4_DEVICE_H */