When using the device emulation feature (introduced in Bluefield-1 SOC), a privileged function (the device emulation manager) will be able to create a channel to execute commands on behalf of the emulated function. This channel will be a general object of type VHCA_TUNNEL that will have a unique ID for each emulated function. This ID will be passed in each cmd that will be issued by the emulation SW in a well known offset in the command header. This channel is needed since the emulated function doesn't have a normal command interface to the HCA HW, but some basic configuration for that function is needed (e.g. initialize and enable the HCA). For that matter, a specific command-set was defined and only those commands will be issued by the HCA.
Unified · Split
| @@ -1390,7 +1390,9 @@ struct mlx5_ifc_cmd_hca_cap_bits { · 1389 unmodified lines | |||
| 1390 | u8 reserved_at_6c8[0x28]; | 1390 | u8 reserved_at_6c8[0x28]; |
| 1391 | u8 sf_base_id[0x10]; | 1391 | u8 sf_base_id[0x10]; |
| 1392 | 1392 | ||
| 1393 | u8 reserved_at_700[0x100]; | 1393 | u8 reserved_at_700[0x80]; |
| 1394 | u8 vhca_tunnel_commands[0x40]; | ||
| 1395 | u8 reserved_at_7c0[0x40]; | ||
| 1394 | }; | 1396 | }; |
| 1395 | 1397 | ||
| 1396 | enum mlx5_flow_destination_type { | 1398 | enum mlx5_flow_destination_type { |
| @@ -9694,7 +9696,7 @@ struct mlx5_ifc_general_obj_in_cmd_hdr_bits { · 8297 unmodified lines | |||
| 9694 | u8 opcode[0x10]; | 9696 | u8 opcode[0x10]; |
| 9695 | u8 uid[0x10]; | 9697 | u8 uid[0x10]; |
| 9696 | 9698 | ||
| 9697 | u8 reserved_at_20[0x10]; | 9699 | u8 vhca_tunnel_id[0x10]; |
| 9698 | u8 obj_type[0x10]; | 9700 | u8 obj_type[0x10]; |
| 9699 | 9701 | ||
| 9700 | u8 obj_id[0x20]; | 9702 | u8 obj_id[0x20]; |