#ifndef TB_H_
#define TB_H_
+#include <linux/pci.h>
+
+#include "tb_regs.h"
#include "ctl.h"
+/**
+ * struct tb_switch - a thunderbolt switch
+ */
+struct tb_switch {
+ struct tb_regs_switch_header config;
+ struct tb_port *ports;
+ struct tb *tb;
+ u64 uid;
+ int cap_plug_events; /* offset, zero if not found */
+ bool is_unplugged; /* unplugged, will go away */
+ u8 *drom;
+};
+
+/**
+ * struct tb_port - a thunderbolt port, part of a tb_switch
+ */
+struct tb_port {
+ struct tb_regs_port_header config;
+ struct tb_switch *sw;
+ struct tb_port *remote; /* remote port, NULL if not connected */
+ int cap_phy; /* offset, zero if not found */
+ u8 port; /* port number on switch */
+ bool disabled; /* disabled by eeprom */
+ struct tb_port *dual_link_port;
+ u8 link_nr:1;
+};
+
+/**
+ * struct tb_path_hop - routing information for a tb_path
+ *
+ * Hop configuration is always done on the IN port of a switch.
+ * in_port and out_port have to be on the same switch. Packets arriving on
+ * in_port with "hop" = in_hop_index will get routed to through out_port. The
+ * next hop to take (on out_port->remote) is determined by next_hop_index.
+ *
+ * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
+ * port.
+ */
+struct tb_path_hop {
+ struct tb_port *in_port;
+ struct tb_port *out_port;
+ int in_hop_index;
+ int in_counter_index; /* write -1 to disable counters for this hop. */
+ int next_hop_index;
+};
+
+/**
+ * enum tb_path_port - path options mask
+ */
+enum tb_path_port {
+ TB_PATH_NONE = 0,
+ TB_PATH_SOURCE = 1, /* activate on the first hop (out of src) */
+ TB_PATH_INTERNAL = 2, /* activate on other hops (not the first/last) */
+ TB_PATH_DESTINATION = 4, /* activate on the last hop (into dst) */
+ TB_PATH_ALL = 7,
+};
+
+/**
+ * struct tb_path - a unidirectional path between two ports
+ *
+ * A path consists of a number of hops (see tb_path_hop). To establish a PCIe
+ * tunnel two paths have to be created between the two PCIe ports.
+ *
+ */
+struct tb_path {
+ struct tb *tb;
+ int nfc_credits; /* non flow controlled credits */
+ enum tb_path_port ingress_shared_buffer;
+ enum tb_path_port egress_shared_buffer;
+ enum tb_path_port ingress_fc_enable;
+ enum tb_path_port egress_fc_enable;
+
+ int priority:3;
+ int weight:4;
+ bool drop_packages;
+ bool activated;
+ struct tb_path_hop *hops;
+ int path_length; /* number of hops */
+};
+
+
/**
* struct tb - main thunderbolt bus structure
*/
struct tb_nhi *nhi;
struct tb_ctl *ctl;
struct workqueue_struct *wq; /* ordered workqueue for plug events */
+ struct tb_switch *root_switch;
+ struct list_head tunnel_list; /* list of active PCIe tunnels */
bool hotplug_active; /*
* tb_handle_hotplug will stop progressing plug
* events and exit if this is not set (it needs to
};
+/* helper functions & macros */
+
+/**
+ * tb_upstream_port() - return the upstream port of a switch
+ *
+ * Every switch has an upstream port (for the root switch it is the NHI).
+ *
+ * During switch alloc/init tb_upstream_port()->remote may be NULL, even for
+ * non root switches (on the NHI port remote is always NULL).
+ *
+ * Return: Returns the upstream port of the switch.
+ */
+static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
+{
+ return &sw->ports[sw->config.upstream_port_number];
+}
+
+static inline u64 tb_route(struct tb_switch *sw)
+{
+ return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
+}
+
+static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_read(sw->tb->ctl,
+ buffer,
+ tb_route(sw),
+ 0,
+ space,
+ offset,
+ length);
+}
+
+static inline int tb_sw_write(struct tb_switch *sw, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_write(sw->tb->ctl,
+ buffer,
+ tb_route(sw),
+ 0,
+ space,
+ offset,
+ length);
+}
+
+static inline int tb_port_read(struct tb_port *port, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_read(port->sw->tb->ctl,
+ buffer,
+ tb_route(port->sw),
+ port->port,
+ space,
+ offset,
+ length);
+}
+
+static inline int tb_port_write(struct tb_port *port, void *buffer,
+ enum tb_cfg_space space, u32 offset, u32 length)
+{
+ return tb_cfg_write(port->sw->tb->ctl,
+ buffer,
+ tb_route(port->sw),
+ port->port,
+ space,
+ offset,
+ length);
+}
+
+#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
+#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
+#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
+#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
+
+
+#define __TB_SW_PRINT(level, sw, fmt, arg...) \
+ do { \
+ struct tb_switch *__sw = (sw); \
+ level(__sw->tb, "%llx: " fmt, \
+ tb_route(__sw), ## arg); \
+ } while (0)
+#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
+#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
+#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
+
+
+#define __TB_PORT_PRINT(level, _port, fmt, arg...) \
+ do { \
+ struct tb_port *__port = (_port); \
+ level(__port->sw->tb, "%llx:%x: " fmt, \
+ tb_route(__port->sw), __port->port, ## arg); \
+ } while (0)
+#define tb_port_WARN(port, fmt, arg...) \
+ __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
+#define tb_port_warn(port, fmt, arg...) \
+ __TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
+#define tb_port_info(port, fmt, arg...) \
+ __TB_PORT_PRINT(tb_info, port, fmt, ##arg)
+
+
struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi);
void thunderbolt_shutdown_and_free(struct tb *tb);
+void thunderbolt_suspend(struct tb *tb);
+void thunderbolt_resume(struct tb *tb);
+
+struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route);
+void tb_switch_free(struct tb_switch *sw);
+void tb_switch_suspend(struct tb_switch *sw);
+int tb_switch_resume(struct tb_switch *sw);
+int tb_switch_reset(struct tb *tb, u64 route);
+void tb_sw_set_unpplugged(struct tb_switch *sw);
+struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route);
+
+int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
+int tb_port_add_nfc_credits(struct tb_port *port, int credits);
+int tb_port_clear_counter(struct tb_port *port, int counter);
+
+int tb_find_cap(struct tb_port *port, enum tb_cfg_space space, u32 value);
+
+struct tb_path *tb_path_alloc(struct tb *tb, int num_hops);
+void tb_path_free(struct tb_path *path);
+int tb_path_activate(struct tb_path *path);
+void tb_path_deactivate(struct tb_path *path);
+bool tb_path_is_invalid(struct tb_path *path);
+
+int tb_drom_read(struct tb_switch *sw);
+int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
+
+
+static inline int tb_route_length(u64 route)
+{
+ return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
+}
+
+static inline bool tb_is_upstream_port(struct tb_port *port)
+{
+ return port == tb_upstream_port(port->sw);
+}
+
+/**
+ * tb_downstream_route() - get route to downstream switch
+ *
+ * Port must not be the upstream port (otherwise a loop is created).
+ *
+ * Return: Returns a route to the switch behind @port.
+ */
+static inline u64 tb_downstream_route(struct tb_port *port)
+{
+ return tb_route(port->sw)
+ | ((u64) port->port << (port->sw->config.depth * 8));
+}
#endif
projects / firefly-linux-kernel-4.4.55.git / blobdiff