Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h
new file mode 100644
index 0000000000..bf690f7bee
--- /dev/null
+++ b/drivers/thunderbolt/tunnel.h
@@ -0,0 +1,141 @@
+/* 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
+ * @maximum_bandwidth: Returns maximum possible bandwidth for this tunnel
+ * @allocated_bandwidth: Return how much bandwidth is allocated for the tunnel
+ * @alloc_bandwidth: Change tunnel bandwidth allocation
+ * @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)
+ * @bw_mode: DP bandwidth allocation mode registers can be used to
+ *	     determine consumed and allocated bandwidth
+ */
+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 (*maximum_bandwidth)(struct tb_tunnel *tunnel, int *max_up,
+				 int *max_down);
+	int (*allocated_bandwidth)(struct tb_tunnel *tunnel, int *allocated_up,
+				   int *allocated_down);
+	int (*alloc_bandwidth)(struct tb_tunnel *tunnel, int *alloc_up,
+			       int *alloc_down);
+	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;
+	bool bw_mode;
+};
+
+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_maximum_bandwidth(struct tb_tunnel *tunnel, int *max_up,
+				int *max_down);
+int tb_tunnel_allocated_bandwidth(struct tb_tunnel *tunnel, int *allocated_up,
+				  int *allocated_down);
+int tb_tunnel_alloc_bandwidth(struct tb_tunnel *tunnel, int *alloc_up,
+			      int *alloc_down);
+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
+