1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Thunderbolt driver - Tunneling support 4 * 5 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> 6 * Copyright (C) 2019, Intel Corporation 7 */ 8 9 #ifndef TB_TUNNEL_H_ 10 #define TB_TUNNEL_H_ 11 12 #include "tb.h" 13 14 enum tb_tunnel_type { 15 TB_TUNNEL_PCI, 16 TB_TUNNEL_DP, 17 TB_TUNNEL_DMA, 18 }; 19 20 /** 21 * struct tb_tunnel - Tunnel between two ports 22 * @tb: Pointer to the domain 23 * @src_port: Source port of the tunnel 24 * @dst_port: Destination port of the tunnel. For discovered incomplete 25 * tunnels may be %NULL or null adapter port instead. 26 * @paths: All paths required by the tunnel 27 * @npaths: Number of paths in @paths 28 * @init: Optional tunnel specific initialization 29 * @activate: Optional tunnel specific activation/deactivation 30 * @list: Tunnels are linked using this field 31 * @type: Type of the tunnel 32 */ 33 struct tb_tunnel { 34 struct tb *tb; 35 struct tb_port *src_port; 36 struct tb_port *dst_port; 37 struct tb_path **paths; 38 size_t npaths; 39 int (*init)(struct tb_tunnel *tunnel); 40 int (*activate)(struct tb_tunnel *tunnel, bool activate); 41 struct list_head list; 42 enum tb_tunnel_type type; 43 }; 44 45 struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down); 46 struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, 47 struct tb_port *down); 48 struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in); 49 struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in, 50 struct tb_port *out); 51 struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, 52 struct tb_port *dst, int transmit_ring, 53 int transmit_path, int receive_ring, 54 int receive_path); 55 56 void tb_tunnel_free(struct tb_tunnel *tunnel); 57 int tb_tunnel_activate(struct tb_tunnel *tunnel); 58 int tb_tunnel_restart(struct tb_tunnel *tunnel); 59 void tb_tunnel_deactivate(struct tb_tunnel *tunnel); 60 bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel); 61 62 static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel) 63 { 64 return tunnel->type == TB_TUNNEL_PCI; 65 } 66 67 static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel) 68 { 69 return tunnel->type == TB_TUNNEL_DP; 70 } 71 72 static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) 73 { 74 return tunnel->type == TB_TUNNEL_DMA; 75 } 76 77 #endif 78 79