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net/mlx5: Introduce VHCA tunnel device capability 

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.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
This commit is contained in:
Max Gurtovoy 2019-07-01 21:14:01 +03:00 committed by Leon Romanovsky
parent f8efee08dd
commit 1dd7382b1b
1 changed files with 4 additions and 2 deletions
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6
include/linux/mlx5/mlx5_ifc.h
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@ -1390,7 +1390,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
u8 reserved_at_6c8[0x28];
u8 sf_base_id[0x10];
u8 reserved_at_700[0x100];
u8 reserved_at_700[0x80];
u8 vhca_tunnel_commands[0x40];
u8 reserved_at_7c0[0x40];
};
enum mlx5_flow_destination_type {
@ -9694,7 +9696,7 @@ struct mlx5_ifc_general_obj_in_cmd_hdr_bits {
u8 opcode[0x10];
u8 uid[0x10];
u8 reserved_at_20[0x10];
u8 vhca_tunnel_id[0x10];
u8 obj_type[0x10];
u8 obj_id[0x20];