mlx4: Implement QP paravirtualization and maintain phys_pkey_cache for smp_snoop

This requires:

1. Replacing the paravirtualized P_Key index (inserted by the guest)
   with the real P_Key index.

2. For UD QPs, placing the guest's true source GID index in the
   address path structure mgid field, and setting the ud_force_mgid
   bit so that the mgid is taken from the QP context and not from the
   WQE when posting sends.

3. For UC and RC QPs, placing the guest's true source GID index in the
   address path structure mgid field.

4. For tunnel and proxy QPs, setting the Q_Key value reserved for that
   proxy/tunnel pair.

Since not all the above adjustments occur in all the QP transitions,
the QP transitions require separate wrapper functions.

Secondly, initialize the P_Key virtualization table to its default
values: Master virtualized table is 1-1 with the real P_Key table,
guest virtualized table has P_Key index 0 mapped to the real P_Key
index 0, and all the other P_Key indices mapped to the reserved
(invalid) P_Key at index 127.

Finally, add logic in smp_snoop for maintaining the phys_P_Key_cache.
and generating events on the master only if a P_Key actually changed.

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

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index dba69d98734a..7d27c3158d0c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -807,6 +807,8 @@ struct mlx4_priv {
         struct io_mapping       *bf_mapping;
         int                     reserved_mtts;
         int                     fs_hash_mode;
+        u8 virt2phys_pkey[MLX4_MFUNC_MAX][MLX4_MAX_PORTS][MLX4_MAX_PORT_PKEYS];
+
 };
 
 static inline struct mlx4_priv *mlx4_priv(struct mlx4_dev *dev)
@@ -1011,16 +1013,61 @@ int mlx4_RST2INIT_QP_wrapper(struct mlx4_dev *dev, int slave,
                              struct mlx4_cmd_mailbox *inbox,
                              struct mlx4_cmd_mailbox *outbox,
                              struct mlx4_cmd_info *cmd);
+int mlx4_INIT2INIT_QP_wrapper(struct mlx4_dev *dev, int slave,
+                              struct mlx4_vhcr *vhcr,
+                              struct mlx4_cmd_mailbox *inbox,
+                              struct mlx4_cmd_mailbox *outbox,
+                              struct mlx4_cmd_info *cmd);
 int mlx4_INIT2RTR_QP_wrapper(struct mlx4_dev *dev, int slave,
                              struct mlx4_vhcr *vhcr,
                              struct mlx4_cmd_mailbox *inbox,
                              struct mlx4_cmd_mailbox *outbox,
                              struct mlx4_cmd_info *cmd);
+int mlx4_RTR2RTS_QP_wrapper(struct mlx4_dev *dev, int slave,
+                            struct mlx4_vhcr *vhcr,
+                            struct mlx4_cmd_mailbox *inbox,
+                            struct mlx4_cmd_mailbox *outbox,
+                            struct mlx4_cmd_info *cmd);
+int mlx4_RTS2RTS_QP_wrapper(struct mlx4_dev *dev, int slave,
+                            struct mlx4_vhcr *vhcr,
+                            struct mlx4_cmd_mailbox *inbox,
+                            struct mlx4_cmd_mailbox *outbox,
+                            struct mlx4_cmd_info *cmd);
+int mlx4_SQERR2RTS_QP_wrapper(struct mlx4_dev *dev, int slave,
+                              struct mlx4_vhcr *vhcr,
+                              struct mlx4_cmd_mailbox *inbox,
+                              struct mlx4_cmd_mailbox *outbox,
+                              struct mlx4_cmd_info *cmd);
+int mlx4_2ERR_QP_wrapper(struct mlx4_dev *dev, int slave,
+                         struct mlx4_vhcr *vhcr,
+                         struct mlx4_cmd_mailbox *inbox,
+                         struct mlx4_cmd_mailbox *outbox,
+                         struct mlx4_cmd_info *cmd);
+int mlx4_RTS2SQD_QP_wrapper(struct mlx4_dev *dev, int slave,
+                            struct mlx4_vhcr *vhcr,
+                            struct mlx4_cmd_mailbox *inbox,
+                            struct mlx4_cmd_mailbox *outbox,
+                            struct mlx4_cmd_info *cmd);
+int mlx4_SQD2SQD_QP_wrapper(struct mlx4_dev *dev, int slave,
+                            struct mlx4_vhcr *vhcr,
+                            struct mlx4_cmd_mailbox *inbox,
+                            struct mlx4_cmd_mailbox *outbox,
+                            struct mlx4_cmd_info *cmd);
+int mlx4_SQD2RTS_QP_wrapper(struct mlx4_dev *dev, int slave,
+                            struct mlx4_vhcr *vhcr,
+                            struct mlx4_cmd_mailbox *inbox,
+                            struct mlx4_cmd_mailbox *outbox,
+                            struct mlx4_cmd_info *cmd);
 int mlx4_2RST_QP_wrapper(struct mlx4_dev *dev, int slave,
                          struct mlx4_vhcr *vhcr,
                          struct mlx4_cmd_mailbox *inbox,
                          struct mlx4_cmd_mailbox *outbox,
                          struct mlx4_cmd_info *cmd);
+int mlx4_QUERY_QP_wrapper(struct mlx4_dev *dev, int slave,
+                          struct mlx4_vhcr *vhcr,
+                          struct mlx4_cmd_mailbox *inbox,
+                          struct mlx4_cmd_mailbox *outbox,
+                          struct mlx4_cmd_info *cmd);
 
 int mlx4_GEN_EQE(struct mlx4_dev *dev, int slave, struct mlx4_eqe *eqe);