mlx4_core: Added FW commands and their wrappers for supporting SRIOV

The following commands are added here:
1. QUERY_FUNC_CAP and its wrapper.  This function is used by VFs when
   they start up to receive configuration information from the PF, such
   as resource quotas for this VF, which ports should be used (currently
   two), what protocol is running on the port (currently Ethernet ONLY,
   or port not active).

2. QUERY_PORT and its wrapper. Previously, this FW command was invoked directly
   by the ETH driver (en_port.c) using mlx4_cmd_box. Virtualization is now
   required here (the VF's MAC address must be substituted for the PFs
   MAC address returned by the FW). We changed the invocation
   in the ETH driver to use mlx4_QUERY_PORT, and added the wrapper.

3. QUERY_HCA. Used by the VF to determine how the HCA was initialized.
   For now, we need only the multicast table member entry size
   (log2_mc_table_entry_sz, in the ConnectX PRM).  No wrapper is needed
   here, because the data may be passed as is to the VF without modification).

   In this command, we have added a GLOBAL_CAPS field for passing required
   configuration information from FW to a VF (this field is to allow safely
                   adding new SRIOV capabilities which require support in VF drivers, too).
   Bits will set here by FW in response to PF-driver configuration commands which
   will activate as yet undefined new SRIOV features. The VF will test to see that
   all required capabilities indicated by this field are supported (i.e., if a bit
   is set and the VF driver does not recognize that bit, it must abort
   its initialization).  Currently, no bits are set.

4. Added a CLOSE_PORT wrapper.  The PF context needs to keep track of how many VF contexts
   have the port open.  The PF context will not actually issue the FW close port command
   until the last port user issues a CLOSE_PORT request.
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Marcel Apfelbaum <marcela@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx4/fw.h

@@ -116,6 +116,23 @@ struct mlx4_dev_cap {
 	u32 max_counters;
 };
 
+struct mlx4_func_cap {
+	u8	function;
+	u8	num_ports;
+	u8	flags;
+	u32	pf_context_behaviour;
+	int	qp_quota;
+	int	cq_quota;
+	int	srq_quota;
+	int	mpt_quota;
+	int	mtt_quota;
+	int	max_eq;
+	int	reserved_eq;
+	int	mcg_quota;
+	u8	physical_port[MLX4_MAX_PORTS + 1];
+	u8	port_flags[MLX4_MAX_PORTS + 1];
+};
+
 struct mlx4_adapter {
 	char board_id[MLX4_BOARD_ID_LEN];
 	u8   inta_pin;
@@ -133,6 +150,7 @@ struct mlx4_init_hca_param {
 	u64 dmpt_base;
 	u64 cmpt_base;
 	u64 mtt_base;
+	u64 global_caps;
 	u16 log_mc_entry_sz;
 	u16 log_mc_hash_sz;
 	u8  log_num_qps;
@@ -167,6 +185,12 @@ struct mlx4_set_ib_param {
 };
 
 int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap);
+int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, struct mlx4_func_cap *func_cap);
+int mlx4_QUERY_FUNC_CAP_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_MAP_FA(struct mlx4_dev *dev, struct mlx4_icm *icm);
 int mlx4_UNMAP_FA(struct mlx4_dev *dev);
 int mlx4_RUN_FW(struct mlx4_dev *dev);

drivers/net/ethernet/mellanox/mlx4/mlx4.h

@@ -915,6 +915,26 @@ int mlx4_QUERY_IF_STAT_wrapper(struct mlx4_dev *dev, int slave,
 			       struct mlx4_cmd_mailbox *outbox,
 			       struct mlx4_cmd_info *cmd);
 
+static inline void set_param_l(u64 *arg, u32 val)
+{
+	*((u32 *)arg) = val;
+}
+
+static inline void set_param_h(u64 *arg, u32 val)
+{
+	*arg = (*arg & 0xffffffff) | ((u64) val << 32);
+}
+
+static inline u32 get_param_l(u64 *arg)
+{
+	return (u32) (*arg & 0xffffffff);
+}
+
+static inline u32 get_param_h(u64 *arg)
+{
+	return (u32)(*arg >> 32);
+}
+
 #define NOT_MASKED_PD_BITS 17
 
 #endif /* MLX4_H */