/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Thunderbolt driver - Tunneling support
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*
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* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
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* Copyright (C) 2019, Intel Corporation
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*/
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#ifndef TB_TUNNEL_H_
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#define TB_TUNNEL_H_
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#include "tb.h"
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enum tb_tunnel_type {
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TB_TUNNEL_PCI,
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TB_TUNNEL_DP,
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TB_TUNNEL_DMA,
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TB_TUNNEL_USB3,
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};
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/**
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* struct tb_tunnel - Tunnel between two ports
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* @tb: Pointer to the domain
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* @src_port: Source port of the tunnel
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* @dst_port: Destination port of the tunnel. For discovered incomplete
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* tunnels may be %NULL or null adapter port instead.
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* @paths: All paths required by the tunnel
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* @npaths: Number of paths in @paths
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* @init: Optional tunnel specific initialization
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* @activate: Optional tunnel specific activation/deactivation
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* @consumed_bandwidth: Return how much bandwidth the tunnel consumes
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* @release_unused_bandwidth: Release all unused bandwidth
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* @reclaim_available_bandwidth: Reclaim back available bandwidth
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* @list: Tunnels are linked using this field
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* @type: Type of the tunnel
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* @max_up: Maximum upstream bandwidth (Mb/s) available for the tunnel.
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* Only set if the bandwidth needs to be limited.
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* @max_down: Maximum downstream bandwidth (Mb/s) available for the tunnel.
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* Only set if the bandwidth needs to be limited.
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* @allocated_up: Allocated upstream bandwidth (only for USB3)
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* @allocated_down: Allocated downstream bandwidth (only for USB3)
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*/
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struct tb_tunnel {
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struct tb *tb;
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struct tb_port *src_port;
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struct tb_port *dst_port;
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struct tb_path **paths;
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size_t npaths;
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int (*init)(struct tb_tunnel *tunnel);
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int (*activate)(struct tb_tunnel *tunnel, bool activate);
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int (*consumed_bandwidth)(struct tb_tunnel *tunnel, int *consumed_up,
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int *consumed_down);
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int (*release_unused_bandwidth)(struct tb_tunnel *tunnel);
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void (*reclaim_available_bandwidth)(struct tb_tunnel *tunnel,
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int *available_up,
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int *available_down);
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struct list_head list;
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enum tb_tunnel_type type;
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int max_up;
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int max_down;
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int allocated_up;
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int allocated_down;
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};
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struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down);
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struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up,
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struct tb_port *down);
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struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in);
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struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in,
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struct tb_port *out, int max_up,
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int max_down);
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struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi,
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struct tb_port *dst, int transmit_ring,
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int transmit_path, int receive_ring,
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int receive_path);
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struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down);
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struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up,
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struct tb_port *down, int max_up,
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int max_down);
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void tb_tunnel_free(struct tb_tunnel *tunnel);
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int tb_tunnel_activate(struct tb_tunnel *tunnel);
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int tb_tunnel_restart(struct tb_tunnel *tunnel);
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void tb_tunnel_deactivate(struct tb_tunnel *tunnel);
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bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel);
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bool tb_tunnel_port_on_path(const struct tb_tunnel *tunnel,
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const struct tb_port *port);
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int tb_tunnel_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up,
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int *consumed_down);
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int tb_tunnel_release_unused_bandwidth(struct tb_tunnel *tunnel);
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void tb_tunnel_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
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int *available_up,
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int *available_down);
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static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel)
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{
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return tunnel->type == TB_TUNNEL_PCI;
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}
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static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel)
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{
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return tunnel->type == TB_TUNNEL_DP;
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}
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static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel)
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{
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return tunnel->type == TB_TUNNEL_DMA;
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}
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static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel)
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{
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return tunnel->type == TB_TUNNEL_USB3;
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}
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#endif
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