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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
3364f0c1 | 2 | /* |
93f36ade | 3 | * Thunderbolt driver - Tunneling support |
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4 | * |
5 | * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> | |
93f36ade | 6 | * Copyright (C) 2019, Intel Corporation |
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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 | ||
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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 |
6ed541c5 | 30 | * @deinit: Optional tunnel specific de-initialization |
93f36ade | 31 | * @activate: Optional tunnel specific activation/deactivation |
06cbcbfa | 32 | * @maximum_bandwidth: Returns maximum possible bandwidth for this tunnel |
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33 | * @allocated_bandwidth: Return how much bandwidth is allocated for the tunnel |
34 | * @alloc_bandwidth: Change tunnel bandwidth allocation | |
a11b88ad | 35 | * @consumed_bandwidth: Return how much bandwidth the tunnel consumes |
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36 | * @release_unused_bandwidth: Release all unused bandwidth |
37 | * @reclaim_available_bandwidth: Reclaim back available bandwidth | |
93f36ade | 38 | * @list: Tunnels are linked using this field |
4f807e47 | 39 | * @type: Type of the tunnel |
0bd680cd | 40 | * @max_up: Maximum upstream bandwidth (Mb/s) available for the tunnel. |
a11b88ad | 41 | * Only set if the bandwidth needs to be limited. |
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42 | * @max_down: Maximum downstream bandwidth (Mb/s) available for the tunnel. |
43 | * Only set if the bandwidth needs to be limited. | |
44 | * @allocated_up: Allocated upstream bandwidth (only for USB3) | |
45 | * @allocated_down: Allocated downstream bandwidth (only for USB3) | |
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46 | * @bw_mode: DP bandwidth allocation mode registers can be used to |
47 | * determine consumed and allocated bandwidth | |
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48 | */ |
49 | struct tb_tunnel { | |
3364f0c1 | 50 | struct tb *tb; |
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51 | struct tb_port *src_port; |
52 | struct tb_port *dst_port; | |
53 | struct tb_path **paths; | |
54 | size_t npaths; | |
4f807e47 | 55 | int (*init)(struct tb_tunnel *tunnel); |
6ed541c5 | 56 | void (*deinit)(struct tb_tunnel *tunnel); |
93f36ade | 57 | int (*activate)(struct tb_tunnel *tunnel, bool activate); |
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58 | int (*maximum_bandwidth)(struct tb_tunnel *tunnel, int *max_up, |
59 | int *max_down); | |
60 | int (*allocated_bandwidth)(struct tb_tunnel *tunnel, int *allocated_up, | |
61 | int *allocated_down); | |
62 | int (*alloc_bandwidth)(struct tb_tunnel *tunnel, int *alloc_up, | |
63 | int *alloc_down); | |
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64 | int (*consumed_bandwidth)(struct tb_tunnel *tunnel, int *consumed_up, |
65 | int *consumed_down); | |
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66 | int (*release_unused_bandwidth)(struct tb_tunnel *tunnel); |
67 | void (*reclaim_available_bandwidth)(struct tb_tunnel *tunnel, | |
68 | int *available_up, | |
69 | int *available_down); | |
3364f0c1 | 70 | struct list_head list; |
4f807e47 | 71 | enum tb_tunnel_type type; |
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72 | int max_up; |
73 | int max_down; | |
74 | int allocated_up; | |
75 | int allocated_down; | |
6ce35635 | 76 | bool bw_mode; |
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77 | }; |
78 | ||
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79 | struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down, |
80 | bool alloc_hopid); | |
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81 | struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, |
82 | struct tb_port *down); | |
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83 | struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in, |
84 | bool alloc_hopid); | |
4f807e47 | 85 | struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in, |
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86 | struct tb_port *out, int link_nr, |
87 | int max_up, int max_down); | |
44242d6c | 88 | struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, |
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89 | struct tb_port *dst, int transmit_path, |
90 | int transmit_ring, int receive_path, | |
91 | int receive_ring); | |
92 | bool tb_tunnel_match_dma(const struct tb_tunnel *tunnel, int transmit_path, | |
93 | int transmit_ring, int receive_path, int receive_ring); | |
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94 | struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down, |
95 | bool alloc_hopid); | |
e6f81858 | 96 | struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up, |
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97 | struct tb_port *down, int max_up, |
98 | int max_down); | |
4f807e47 | 99 | |
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100 | void tb_tunnel_free(struct tb_tunnel *tunnel); |
101 | int tb_tunnel_activate(struct tb_tunnel *tunnel); | |
102 | int tb_tunnel_restart(struct tb_tunnel *tunnel); | |
103 | void tb_tunnel_deactivate(struct tb_tunnel *tunnel); | |
104 | bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel); | |
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105 | bool tb_tunnel_port_on_path(const struct tb_tunnel *tunnel, |
106 | const struct tb_port *port); | |
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107 | int tb_tunnel_maximum_bandwidth(struct tb_tunnel *tunnel, int *max_up, |
108 | int *max_down); | |
109 | int tb_tunnel_allocated_bandwidth(struct tb_tunnel *tunnel, int *allocated_up, | |
110 | int *allocated_down); | |
111 | int tb_tunnel_alloc_bandwidth(struct tb_tunnel *tunnel, int *alloc_up, | |
112 | int *alloc_down); | |
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113 | int tb_tunnel_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up, |
114 | int *consumed_down); | |
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115 | int tb_tunnel_release_unused_bandwidth(struct tb_tunnel *tunnel); |
116 | void tb_tunnel_reclaim_available_bandwidth(struct tb_tunnel *tunnel, | |
117 | int *available_up, | |
118 | int *available_down); | |
3364f0c1 | 119 | |
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120 | static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel) |
121 | { | |
122 | return tunnel->type == TB_TUNNEL_PCI; | |
123 | } | |
124 | ||
125 | static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel) | |
126 | { | |
127 | return tunnel->type == TB_TUNNEL_DP; | |
128 | } | |
129 | ||
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130 | static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) |
131 | { | |
132 | return tunnel->type == TB_TUNNEL_DMA; | |
133 | } | |
134 | ||
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135 | static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel) |
136 | { | |
137 | return tunnel->type == TB_TUNNEL_USB3; | |
138 | } | |
139 | ||
3364f0c1 AN |
140 | #endif |
141 |