forked from mirrors/linux
44242d6c97
In addition to PCIe and Display Port tunnels it is also possible to create tunnels that forward DMA traffic from the host interface adapter (NHI) to a NULL port that is connected to another domain through a Thunderbolt cable. These tunnels can be used to carry software messages such as networking packets. To support this we introduce another tunnel type (TB_TUNNEL_DMA) that supports paths from NHI to NULL port and back. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Thunderbolt driver - Tunneling support
|
|
*
|
|
* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
|
|
* Copyright (C) 2019, Intel Corporation
|
|
*/
|
|
|
|
#ifndef TB_TUNNEL_H_
|
|
#define TB_TUNNEL_H_
|
|
|
|
#include "tb.h"
|
|
|
|
enum tb_tunnel_type {
|
|
TB_TUNNEL_PCI,
|
|
TB_TUNNEL_DP,
|
|
TB_TUNNEL_DMA,
|
|
};
|
|
|
|
/**
|
|
* struct tb_tunnel - Tunnel between two ports
|
|
* @tb: Pointer to the domain
|
|
* @src_port: Source port of the tunnel
|
|
* @dst_port: Destination port of the tunnel. For discovered incomplete
|
|
* tunnels may be %NULL or null adapter port instead.
|
|
* @paths: All paths required by the tunnel
|
|
* @npaths: Number of paths in @paths
|
|
* @init: Optional tunnel specific initialization
|
|
* @activate: Optional tunnel specific activation/deactivation
|
|
* @list: Tunnels are linked using this field
|
|
* @type: Type of the tunnel
|
|
*/
|
|
struct tb_tunnel {
|
|
struct tb *tb;
|
|
struct tb_port *src_port;
|
|
struct tb_port *dst_port;
|
|
struct tb_path **paths;
|
|
size_t npaths;
|
|
int (*init)(struct tb_tunnel *tunnel);
|
|
int (*activate)(struct tb_tunnel *tunnel, bool activate);
|
|
struct list_head list;
|
|
enum tb_tunnel_type type;
|
|
};
|
|
|
|
struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down);
|
|
struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up,
|
|
struct tb_port *down);
|
|
struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in);
|
|
struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in,
|
|
struct tb_port *out);
|
|
struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
|
|
struct tb_port *dst, int transmit_ring,
|
|
int transmit_path, int receive_ring,
|
|
int receive_path);
|
|
|
|
void tb_tunnel_free(struct tb_tunnel *tunnel);
|
|
int tb_tunnel_activate(struct tb_tunnel *tunnel);
|
|
int tb_tunnel_restart(struct tb_tunnel *tunnel);
|
|
void tb_tunnel_deactivate(struct tb_tunnel *tunnel);
|
|
bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel);
|
|
|
|
static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel)
|
|
{
|
|
return tunnel->type == TB_TUNNEL_PCI;
|
|
}
|
|
|
|
static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel)
|
|
{
|
|
return tunnel->type == TB_TUNNEL_DP;
|
|
}
|
|
|
|
static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel)
|
|
{
|
|
return tunnel->type == TB_TUNNEL_DMA;
|
|
}
|
|
|
|
#endif
|
|
|