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 TB_TUNNEL_USB3, 19 }; 20 21 /** 22 * struct tb_tunnel - Tunnel between two ports 23 * @tb: Pointer to the domain 24 * @src_port: Source port of the tunnel 25 * @dst_port: Destination port of the tunnel. For discovered incomplete 26 * tunnels may be %NULL or null adapter port instead. 27 * @paths: All paths required by the tunnel 28 * @npaths: Number of paths in @paths 29 * @init: Optional tunnel specific initialization 30 * @activate: Optional tunnel specific activation/deactivation 31 * @consumed_bandwidth: Return how much bandwidth the tunnel consumes 32 * @list: Tunnels are linked using this field 33 * @type: Type of the tunnel 34 * @max_bw: Maximum bandwidth (Mb/s) available for the tunnel (only for DP). 35 * Only set if the bandwidth needs to be limited. 36 */ 37 struct tb_tunnel { 38 struct tb *tb; 39 struct tb_port *src_port; 40 struct tb_port *dst_port; 41 struct tb_path **paths; 42 size_t npaths; 43 int (*init)(struct tb_tunnel *tunnel); 44 int (*activate)(struct tb_tunnel *tunnel, bool activate); 45 int (*consumed_bandwidth)(struct tb_tunnel *tunnel); 46 struct list_head list; 47 enum tb_tunnel_type type; 48 unsigned int max_bw; 49 }; 50 51 struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down); 52 struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, 53 struct tb_port *down); 54 struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in); 55 struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in, 56 struct tb_port *out, int max_bw); 57 struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, 58 struct tb_port *dst, int transmit_ring, 59 int transmit_path, int receive_ring, 60 int receive_path); 61 struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down); 62 struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up, 63 struct tb_port *down); 64 65 void tb_tunnel_free(struct tb_tunnel *tunnel); 66 int tb_tunnel_activate(struct tb_tunnel *tunnel); 67 int tb_tunnel_restart(struct tb_tunnel *tunnel); 68 void tb_tunnel_deactivate(struct tb_tunnel *tunnel); 69 bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel); 70 bool tb_tunnel_switch_on_path(const struct tb_tunnel *tunnel, 71 const struct tb_switch *sw); 72 int tb_tunnel_consumed_bandwidth(struct tb_tunnel *tunnel); 73 74 static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel) 75 { 76 return tunnel->type == TB_TUNNEL_PCI; 77 } 78 79 static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel) 80 { 81 return tunnel->type == TB_TUNNEL_DP; 82 } 83 84 static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) 85 { 86 return tunnel->type == TB_TUNNEL_DMA; 87 } 88 89 static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel) 90 { 91 return tunnel->type == TB_TUNNEL_USB3; 92 } 93 94 #endif 95 96