net/mlx5: Add dynamic MSI-X capabilities bits

These new fields declare the number of MSI-X vectors that is possible to
allocate on the VF through PF configuration.

Value must be in range defined by min_dynamic_vf_msix_table_size and
max_dynamic_vf_msix_table_size.

The driver should continue to query its MSI-X table through PCI
configuration header.

Link: https://lore.kernel.org/linux-pci/[email protected]
Acked-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>

Author: rleon

include/linux/mlx5/mlx5_ifc.h

@@ -1683,7 +1683,16 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 	u8	   reserved_at_6e0[0x10];
 	u8	   sf_base_id[0x10];
 
-	u8	   reserved_at_700[0x80];
+	u8	   reserved_at_700[0x8];
+	u8	   num_total_dynamic_vf_msix[0x18];
+	u8	   reserved_at_720[0x14];
+	u8	   dynamic_msix_table_size[0xc];
+	u8	   reserved_at_740[0xc];
+	u8	   min_dynamic_vf_msix_table_size[0x4];
+	u8	   reserved_at_750[0x4];
+	u8	   max_dynamic_vf_msix_table_size[0xc];
+
+	u8	   reserved_at_760[0x20];
 	u8	   vhca_tunnel_commands[0x40];
 	u8	   reserved_at_7c0[0x40];
 };