diff options
Diffstat (limited to 'drivers/thunderbolt/tunnel.h')
| -rw-r--r-- | drivers/thunderbolt/tunnel.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h new file mode 100644 index 000000000..bb4d1f1d6 --- /dev/null +++ b/drivers/thunderbolt/tunnel.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Thunderbolt driver - Tunneling support + * + * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> + * Copyright (C) 2019, Intel Corporation + */ + +#ifndef TB_TUNNEL_H_ +#define TB_TUNNEL_H_ + +#include "tb.h" + +enum tb_tunnel_type { + TB_TUNNEL_PCI, + TB_TUNNEL_DP, + TB_TUNNEL_DMA, + TB_TUNNEL_USB3, +}; + +/** + * struct tb_tunnel - Tunnel between two ports + * @tb: Pointer to the domain + * @src_port: Source port of the tunnel + * @dst_port: Destination port of the tunnel. For discovered incomplete + * tunnels may be %NULL or null adapter port instead. + * @paths: All paths required by the tunnel + * @npaths: Number of paths in @paths + * @init: Optional tunnel specific initialization + * @deinit: Optional tunnel specific de-initialization + * @activate: Optional tunnel specific activation/deactivation + * @consumed_bandwidth: Return how much bandwidth the tunnel consumes + * @release_unused_bandwidth: Release all unused bandwidth + * @reclaim_available_bandwidth: Reclaim back available bandwidth + * @list: Tunnels are linked using this field + * @type: Type of the tunnel + * @max_up: Maximum upstream bandwidth (Mb/s) available for the tunnel. + * Only set if the bandwidth needs to be limited. + * @max_down: Maximum downstream bandwidth (Mb/s) available for the tunnel. + * Only set if the bandwidth needs to be limited. + * @allocated_up: Allocated upstream bandwidth (only for USB3) + * @allocated_down: Allocated downstream bandwidth (only for USB3) + */ +struct tb_tunnel { + struct tb *tb; + struct tb_port *src_port; + struct tb_port *dst_port; + struct tb_path **paths; + size_t npaths; + int (*init)(struct tb_tunnel *tunnel); + void (*deinit)(struct tb_tunnel *tunnel); + int (*activate)(struct tb_tunnel *tunnel, bool activate); + int (*consumed_bandwidth)(struct tb_tunnel *tunnel, int *consumed_up, + int *consumed_down); + int (*release_unused_bandwidth)(struct tb_tunnel *tunnel); + void (*reclaim_available_bandwidth)(struct tb_tunnel *tunnel, + int *available_up, + int *available_down); + struct list_head list; + enum tb_tunnel_type type; + int max_up; + int max_down; + int allocated_up; + int allocated_down; +}; + +struct tb_tunnel *tb_tunnel_discover_pci(struct tb *tb, struct tb_port *down, + bool alloc_hopid); +struct tb_tunnel *tb_tunnel_alloc_pci(struct tb *tb, struct tb_port *up, + struct tb_port *down); +struct tb_tunnel *tb_tunnel_discover_dp(struct tb *tb, struct tb_port *in, + bool alloc_hopid); +struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in, + struct tb_port *out, int link_nr, + int max_up, int max_down); +struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, + struct tb_port *dst, int transmit_path, + int transmit_ring, int receive_path, + int receive_ring); +bool tb_tunnel_match_dma(const struct tb_tunnel *tunnel, int transmit_path, + int transmit_ring, int receive_path, int receive_ring); +struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down, + bool alloc_hopid); +struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up, + struct tb_port *down, int max_up, + int max_down); + +void tb_tunnel_free(struct tb_tunnel *tunnel); +int tb_tunnel_activate(struct tb_tunnel *tunnel); +int tb_tunnel_restart(struct tb_tunnel *tunnel); +void tb_tunnel_deactivate(struct tb_tunnel *tunnel); +bool tb_tunnel_is_invalid(struct tb_tunnel *tunnel); +bool tb_tunnel_port_on_path(const struct tb_tunnel *tunnel, + const struct tb_port *port); +int tb_tunnel_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up, + int *consumed_down); +int tb_tunnel_release_unused_bandwidth(struct tb_tunnel *tunnel); +void tb_tunnel_reclaim_available_bandwidth(struct tb_tunnel *tunnel, + int *available_up, + int *available_down); + +static inline bool tb_tunnel_is_pci(const struct tb_tunnel *tunnel) +{ + return tunnel->type == TB_TUNNEL_PCI; +} + +static inline bool tb_tunnel_is_dp(const struct tb_tunnel *tunnel) +{ + return tunnel->type == TB_TUNNEL_DP; +} + +static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) +{ + return tunnel->type == TB_TUNNEL_DMA; +} + +static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel) +{ + return tunnel->type == TB_TUNNEL_USB3; +} + +#endif + |