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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, |
4f807e47 MW |
18 | }; |
19 | ||
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20 | /** |
21 | * struct tb_tunnel - Tunnel between two ports | |
22 | * @tb: Pointer to the domain | |
23 | * @src_port: Source port of the tunnel | |
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24 | * @dst_port: Destination port of the tunnel. For discovered incomplete |
25 | * tunnels may be %NULL or null adapter port instead. | |
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26 | * @paths: All paths required by the tunnel |
27 | * @npaths: Number of paths in @paths | |
4f807e47 | 28 | * @init: Optional tunnel specific initialization |
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29 | * @activate: Optional tunnel specific activation/deactivation |
30 | * @list: Tunnels are linked using this field | |
4f807e47 | 31 | * @type: Type of the tunnel |
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32 | */ |
33 | struct tb_tunnel { | |
3364f0c1 | 34 | struct tb *tb; |
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35 | struct tb_port *src_port; |
36 | struct tb_port *dst_port; | |
37 | struct tb_path **paths; | |
38 | size_t npaths; | |
4f807e47 | 39 | int (*init)(struct tb_tunnel *tunnel); |
93f36ade | 40 | int (*activate)(struct tb_tunnel *tunnel, bool activate); |
3364f0c1 | 41 | struct list_head list; |
4f807e47 | 42 | enum tb_tunnel_type type; |
3364f0c1 AN |
43 | }; |
44 | ||
0414bec5 | 45 | struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down); |
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46 | struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, |
47 | struct tb_port *down); | |
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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); | |
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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); | |
4f807e47 | 55 | |
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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); | |
3364f0c1 | 61 | |
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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 | ||
44242d6c MW |
72 | static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) |
73 | { | |
74 | return tunnel->type == TB_TUNNEL_DMA; | |
75 | } | |
76 | ||
3364f0c1 AN |
77 | #endif |
78 |