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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
3364f0c1 | 2 | /* |
93f36ade | 3 | * Thunderbolt driver - Tunneling support |
3364f0c1 AN |
4 | * |
5 | * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> | |
93f36ade | 6 | * Copyright (C) 2019, Intel Corporation |
3364f0c1 AN |
7 | */ |
8 | ||
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9 | #ifndef TB_TUNNEL_H_ |
10 | #define TB_TUNNEL_H_ | |
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11 | |
12 | #include "tb.h" | |
13 | ||
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14 | enum tb_tunnel_type { |
15 | TB_TUNNEL_PCI, | |
16 | TB_TUNNEL_DP, | |
44242d6c | 17 | TB_TUNNEL_DMA, |
e6f81858 | 18 | TB_TUNNEL_USB3, |
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19 | }; |
20 | ||
93f36ade MW |
21 | /** |
22 | * struct tb_tunnel - Tunnel between two ports | |
23 | * @tb: Pointer to the domain | |
24 | * @src_port: Source port of the tunnel | |
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25 | * @dst_port: Destination port of the tunnel. For discovered incomplete |
26 | * tunnels may be %NULL or null adapter port instead. | |
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27 | * @paths: All paths required by the tunnel |
28 | * @npaths: Number of paths in @paths | |
4f807e47 | 29 | * @init: Optional tunnel specific initialization |
93f36ade | 30 | * @activate: Optional tunnel specific activation/deactivation |
a11b88ad | 31 | * @consumed_bandwidth: Return how much bandwidth the tunnel consumes |
93f36ade | 32 | * @list: Tunnels are linked using this field |
4f807e47 | 33 | * @type: Type of the tunnel |
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34 | * @max_bw: Maximum bandwidth (Mb/s) available for the tunnel (only for DP). |
35 | * Only set if the bandwidth needs to be limited. | |
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36 | */ |
37 | struct tb_tunnel { | |
3364f0c1 | 38 | struct tb *tb; |
93f36ade MW |
39 | struct tb_port *src_port; |
40 | struct tb_port *dst_port; | |
41 | struct tb_path **paths; | |
42 | size_t npaths; | |
4f807e47 | 43 | int (*init)(struct tb_tunnel *tunnel); |
93f36ade | 44 | int (*activate)(struct tb_tunnel *tunnel, bool activate); |
a11b88ad | 45 | int (*consumed_bandwidth)(struct tb_tunnel *tunnel); |
3364f0c1 | 46 | struct list_head list; |
4f807e47 | 47 | enum tb_tunnel_type type; |
a11b88ad | 48 | unsigned int max_bw; |
3364f0c1 AN |
49 | }; |
50 | ||
0414bec5 | 51 | struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down); |
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52 | struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, |
53 | struct tb_port *down); | |
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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, | |
a11b88ad | 56 | struct tb_port *out, int max_bw); |
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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); | |
e6f81858 RM |
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); | |
4f807e47 | 64 | |
93f36ade MW |
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); | |
a11b88ad MW |
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); | |
3364f0c1 | 73 | |
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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 | ||
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84 | static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) |
85 | { | |
86 | return tunnel->type == TB_TUNNEL_DMA; | |
87 | } | |
88 | ||
e6f81858 RM |
89 | static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel) |
90 | { | |
91 | return tunnel->type == TB_TUNNEL_USB3; | |
92 | } | |
93 | ||
3364f0c1 AN |
94 | #endif |
95 |