/* 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 * @consumed_bandwidth: Return how much bandwidth the tunnel consumes * @list: Tunnels are linked using this field * @type: Type of the tunnel * @max_bw: Maximum bandwidth (Mb/s) available for the tunnel (only for DP). * Only set if the bandwidth needs to be limited. */ 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); struct list_head list; enum tb_tunnel_type type; unsigned int max_bw; }; 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_bw); 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); bool tb_tunnel_switch_on_path(const struct tb_tunnel *tunnel, const struct tb_switch *sw); int tb_tunnel_consumed_bandwidth(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