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/* 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,
TB_TUNNEL_USB3,
};
/**
* 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
* @consumed_bandwidth: Return how much bandwidth the tunnel consumes
* @release_unused_bandwidth: Release all unused bandwidth
* @reclaim_available_bandwidth: Reclaim back available bandwidth
* @list: Tunnels are linked using this field
* @type: Type of the tunnel
* @max_up: Maximum upstream bandwidth (Mb/s) available for the tunnel.
* Only set if the bandwidth needs to be limited.
* @max_down: Maximum downstream bandwidth (Mb/s) available for the tunnel.
* Only set if the bandwidth needs to be limited.
* @allocated_up: Allocated upstream bandwidth (only for USB3)
* @allocated_down: Allocated downstream bandwidth (only for USB3)
*/
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);
int (*consumed_bandwidth)(struct tb_tunnel *tunnel, int *consumed_up,
int *consumed_down);
int (*release_unused_bandwidth)(struct tb_tunnel *tunnel);
void (*reclaim_available_bandwidth)(struct tb_tunnel *tunnel,
int *available_up,
int *available_down);
struct list_head list;
enum tb_tunnel_type type;
int max_up;
int max_down;
int allocated_up;
int allocated_down;
};
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, int max_up,
int max_down);
struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
struct tb_port *dst, int transmit_path,
int transmit_ring, int receive_path,
int receive_ring);
bool tb_tunnel_match_dma(const struct tb_tunnel *tunnel, int transmit_path,
int transmit_ring, int receive_path, int receive_ring);
struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down);
struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up,
struct tb_port *down, int max_up,
int max_down);
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);
bool tb_tunnel_port_on_path(const struct tb_tunnel *tunnel,
const struct tb_port *port);
int tb_tunnel_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up,
int *consumed_down);
int tb_tunnel_release_unused_bandwidth(struct tb_tunnel *tunnel);
void tb_tunnel_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
int *available_up,
int *available_down);
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;
}
static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel)
{
return tunnel->type == TB_TUNNEL_USB3;
}
#endif
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