staging: greybus: move the greybus core to drivers/greybus

The Greybus core code has been stable for a long time, and has been
shipping for many years in millions of phones.  With the advent of a
recent Google Summer of Code project, and a number of new devices in the
works from various companies, it is time to get the core greybus code
out of staging as it really is going to be with us for a while.

Cc: Johan Hovold <johan@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: greybus-dev@lists.linaro.org
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Alex Elder <elder@kernel.org>
Link: https://lore.kernel.org/r/20190825055429.18547-9-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 502 insertions, 0 deletions

diff --git a/drivers/greybus/greybus_trace.h b/drivers/greybus/greybus_trace.h
new file mode 100644
index 000000000000..1bc9f1275c65
--- /dev/null
+++ b/drivers/greybus/greybus_trace.h
@@ -0,0 +1,502 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus driver and device API
+ *
+ * Copyright 2015 Google Inc.
+ * Copyright 2015 Linaro Ltd.
+ */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM greybus
+
+#if !defined(_TRACE_GREYBUS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_GREYBUS_H
+
+#include <linux/tracepoint.h>
+
+struct gb_message;
+struct gb_operation;
+struct gb_connection;
+struct gb_bundle;
+struct gb_host_device;
+
+DECLARE_EVENT_CLASS(gb_message,
+
+	TP_PROTO(struct gb_message *message),
+
+	TP_ARGS(message),
+
+	TP_STRUCT__entry(
+		__field(u16, size)
+		__field(u16, operation_id)
+		__field(u8, type)
+		__field(u8, result)
+	),
+
+	TP_fast_assign(
+		__entry->size = le16_to_cpu(message->header->size);
+		__entry->operation_id =
+			le16_to_cpu(message->header->operation_id);
+		__entry->type = message->header->type;
+		__entry->result = message->header->result;
+	),
+
+	TP_printk("size=%hu operation_id=0x%04x type=0x%02x result=0x%02x",
+		  __entry->size, __entry->operation_id,
+		  __entry->type, __entry->result)
+);
+
+#define DEFINE_MESSAGE_EVENT(name)					\
+		DEFINE_EVENT(gb_message, name,				\
+				TP_PROTO(struct gb_message *message),	\
+				TP_ARGS(message))
+
+/*
+ * Occurs immediately before calling a host device's message_send()
+ * method.
+ */
+DEFINE_MESSAGE_EVENT(gb_message_send);
+
+/*
+ * Occurs after an incoming request message has been received
+ */
+DEFINE_MESSAGE_EVENT(gb_message_recv_request);
+
+/*
+ * Occurs after an incoming response message has been received,
+ * after its matching request has been found.
+ */
+DEFINE_MESSAGE_EVENT(gb_message_recv_response);
+
+/*
+ * Occurs after an operation has been canceled, possibly before the
+ * cancellation is complete.
+ */
+DEFINE_MESSAGE_EVENT(gb_message_cancel_outgoing);
+
+/*
+ * Occurs when an incoming request is cancelled; if the response has
+ * been queued for sending, this occurs after it is sent.
+ */
+DEFINE_MESSAGE_EVENT(gb_message_cancel_incoming);
+
+/*
+ * Occurs in the host driver message_send() function just prior to
+ * handing off the data to be processed by hardware.
+ */
+DEFINE_MESSAGE_EVENT(gb_message_submit);
+
+#undef DEFINE_MESSAGE_EVENT
+
+DECLARE_EVENT_CLASS(gb_operation,
+
+	TP_PROTO(struct gb_operation *operation),
+
+	TP_ARGS(operation),
+
+	TP_STRUCT__entry(
+		__field(u16, cport_id)	/* CPort of HD side of connection */
+		__field(u16, id)	/* Operation ID */
+		__field(u8, type)
+		__field(unsigned long, flags)
+		__field(int, active)
+		__field(int, waiters)
+		__field(int, errno)
+	),
+
+	TP_fast_assign(
+		__entry->cport_id = operation->connection->hd_cport_id;
+		__entry->id = operation->id;
+		__entry->type = operation->type;
+		__entry->flags = operation->flags;
+		__entry->active = operation->active;
+		__entry->waiters = atomic_read(&operation->waiters);
+		__entry->errno = operation->errno;
+	),
+
+	TP_printk("id=%04x type=0x%02x cport_id=%04x flags=0x%lx active=%d waiters=%d errno=%d",
+		  __entry->id, __entry->cport_id, __entry->type, __entry->flags,
+		  __entry->active, __entry->waiters, __entry->errno)
+);
+
+#define DEFINE_OPERATION_EVENT(name)					\
+		DEFINE_EVENT(gb_operation, name,			\
+				TP_PROTO(struct gb_operation *operation), \
+				TP_ARGS(operation))
+
+/*
+ * Occurs after a new operation is created for an outgoing request
+ * has been successfully created.
+ */
+DEFINE_OPERATION_EVENT(gb_operation_create);
+
+/*
+ * Occurs after a new core operation has been created.
+ */
+DEFINE_OPERATION_EVENT(gb_operation_create_core);
+
+/*
+ * Occurs after a new operation has been created for an incoming
+ * request has been successfully created and initialized.
+ */
+DEFINE_OPERATION_EVENT(gb_operation_create_incoming);
+
+/*
+ * Occurs when the last reference to an operation has been dropped,
+ * prior to freeing resources.
+ */
+DEFINE_OPERATION_EVENT(gb_operation_destroy);
+
+/*
+ * Occurs when an operation has been marked active, after updating
+ * its active count.
+ */
+DEFINE_OPERATION_EVENT(gb_operation_get_active);
+
+/*
+ * Occurs when an operation has been marked active, before updating
+ * its active count.
+ */
+DEFINE_OPERATION_EVENT(gb_operation_put_active);
+
+#undef DEFINE_OPERATION_EVENT
+
+DECLARE_EVENT_CLASS(gb_connection,
+
+	TP_PROTO(struct gb_connection *connection),
+
+	TP_ARGS(connection),
+
+	TP_STRUCT__entry(
+		__field(int, hd_bus_id)
+		__field(u8, bundle_id)
+		/* name contains "hd_cport_id/intf_id:cport_id" */
+		__dynamic_array(char, name, sizeof(connection->name))
+		__field(enum gb_connection_state, state)
+		__field(unsigned long, flags)
+	),
+
+	TP_fast_assign(
+		__entry->hd_bus_id = connection->hd->bus_id;
+		__entry->bundle_id = connection->bundle ?
+				connection->bundle->id : BUNDLE_ID_NONE;
+		memcpy(__get_str(name), connection->name,
+					sizeof(connection->name));
+		__entry->state = connection->state;
+		__entry->flags = connection->flags;
+	),
+
+	TP_printk("hd_bus_id=%d bundle_id=0x%02x name=\"%s\" state=%u flags=0x%lx",
+		  __entry->hd_bus_id, __entry->bundle_id, __get_str(name),
+		  (unsigned int)__entry->state, __entry->flags)
+);
+
+#define DEFINE_CONNECTION_EVENT(name)					\
+		DEFINE_EVENT(gb_connection, name,			\
+				TP_PROTO(struct gb_connection *connection), \
+				TP_ARGS(connection))
+
+/*
+ * Occurs after a new connection is successfully created.
+ */
+DEFINE_CONNECTION_EVENT(gb_connection_create);
+
+/*
+ * Occurs when the last reference to a connection has been dropped,
+ * before its resources are freed.
+ */
+DEFINE_CONNECTION_EVENT(gb_connection_release);
+
+/*
+ * Occurs when a new reference to connection is added, currently
+ * only when a message over the connection is received.
+ */
+DEFINE_CONNECTION_EVENT(gb_connection_get);
+
+/*
+ * Occurs when a new reference to connection is dropped, after a
+ * a received message is handled, or when the connection is
+ * destroyed.
+ */
+DEFINE_CONNECTION_EVENT(gb_connection_put);
+
+/*
+ * Occurs when a request to enable a connection is made, either for
+ * transmit only, or for both transmit and receive.
+ */
+DEFINE_CONNECTION_EVENT(gb_connection_enable);
+
+/*
+ * Occurs when a request to disable a connection is made, either for
+ * receive only, or for both transmit and receive.  Also occurs when
+ * a request to forcefully disable a connection is made.
+ */
+DEFINE_CONNECTION_EVENT(gb_connection_disable);
+
+#undef DEFINE_CONNECTION_EVENT
+
+DECLARE_EVENT_CLASS(gb_bundle,
+
+	TP_PROTO(struct gb_bundle *bundle),
+
+	TP_ARGS(bundle),
+
+	TP_STRUCT__entry(
+		__field(u8, intf_id)
+		__field(u8, id)
+		__field(u8, class)
+		__field(size_t, num_cports)
+	),
+
+	TP_fast_assign(
+		__entry->intf_id = bundle->intf->interface_id;
+		__entry->id = bundle->id;
+		__entry->class = bundle->class;
+		__entry->num_cports = bundle->num_cports;
+	),
+
+	TP_printk("intf_id=0x%02x id=%02x class=0x%02x num_cports=%zu",
+		  __entry->intf_id, __entry->id, __entry->class,
+		  __entry->num_cports)
+);
+
+#define DEFINE_BUNDLE_EVENT(name)					\
+		DEFINE_EVENT(gb_bundle, name,			\
+				TP_PROTO(struct gb_bundle *bundle), \
+				TP_ARGS(bundle))
+
+/*
+ * Occurs after a new bundle is successfully created.
+ */
+DEFINE_BUNDLE_EVENT(gb_bundle_create);
+
+/*
+ * Occurs when the last reference to a bundle has been dropped,
+ * before its resources are freed.
+ */
+DEFINE_BUNDLE_EVENT(gb_bundle_release);
+
+/*
+ * Occurs when a bundle is added to an interface when the interface
+ * is enabled.
+ */
+DEFINE_BUNDLE_EVENT(gb_bundle_add);
+
+/*
+ * Occurs when a registered bundle gets destroyed, normally at the
+ * time an interface is disabled.
+ */
+DEFINE_BUNDLE_EVENT(gb_bundle_destroy);
+
+#undef DEFINE_BUNDLE_EVENT
+
+DECLARE_EVENT_CLASS(gb_interface,
+
+	TP_PROTO(struct gb_interface *intf),
+
+	TP_ARGS(intf),
+
+	TP_STRUCT__entry(
+		__field(u8, module_id)
+		__field(u8, id)		/* Interface id */
+		__field(u8, device_id)
+		__field(int, disconnected)	/* bool */
+		__field(int, ejected)		/* bool */
+		__field(int, active)		/* bool */
+		__field(int, enabled)		/* bool */
+		__field(int, mode_switch)	/* bool */
+	),
+
+	TP_fast_assign(
+		__entry->module_id = intf->module->module_id;
+		__entry->id = intf->interface_id;
+		__entry->device_id = intf->device_id;
+		__entry->disconnected = intf->disconnected;
+		__entry->ejected = intf->ejected;
+		__entry->active = intf->active;
+		__entry->enabled = intf->enabled;
+		__entry->mode_switch = intf->mode_switch;
+	),
+
+	TP_printk("intf_id=%hhu device_id=%hhu module_id=%hhu D=%d J=%d A=%d E=%d M=%d",
+		__entry->id, __entry->device_id, __entry->module_id,
+		__entry->disconnected, __entry->ejected, __entry->active,
+		__entry->enabled, __entry->mode_switch)
+);
+
+#define DEFINE_INTERFACE_EVENT(name)					\
+		DEFINE_EVENT(gb_interface, name,			\
+				TP_PROTO(struct gb_interface *intf),	\
+				TP_ARGS(intf))
+
+/*
+ * Occurs after a new interface is successfully created.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_create);
+
+/*
+ * Occurs after the last reference to an interface has been dropped.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_release);
+
+/*
+ * Occurs after an interface been registerd.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_add);
+
+/*
+ * Occurs when a registered interface gets deregisterd.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_del);
+
+/*
+ * Occurs when a registered interface has been successfully
+ * activated.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_activate);
+
+/*
+ * Occurs when an activated interface is being deactivated.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_deactivate);
+
+/*
+ * Occurs when an interface has been successfully enabled.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_enable);
+
+/*
+ * Occurs when an enabled interface is being disabled.
+ */
+DEFINE_INTERFACE_EVENT(gb_interface_disable);
+
+#undef DEFINE_INTERFACE_EVENT
+
+DECLARE_EVENT_CLASS(gb_module,
+
+	TP_PROTO(struct gb_module *module),
+
+	TP_ARGS(module),
+
+	TP_STRUCT__entry(
+		__field(int, hd_bus_id)
+		__field(u8, module_id)
+		__field(size_t, num_interfaces)
+		__field(int, disconnected)	/* bool */
+	),
+
+	TP_fast_assign(
+		__entry->hd_bus_id = module->hd->bus_id;
+		__entry->module_id = module->module_id;
+		__entry->num_interfaces = module->num_interfaces;
+		__entry->disconnected = module->disconnected;
+	),
+
+	TP_printk("hd_bus_id=%d module_id=%hhu num_interfaces=%zu disconnected=%d",
+		__entry->hd_bus_id, __entry->module_id,
+		__entry->num_interfaces, __entry->disconnected)
+);
+
+#define DEFINE_MODULE_EVENT(name)					\
+		DEFINE_EVENT(gb_module, name,				\
+				TP_PROTO(struct gb_module *module),	\
+				TP_ARGS(module))
+
+/*
+ * Occurs after a new module is successfully created, before
+ * creating any of its interfaces.
+ */
+DEFINE_MODULE_EVENT(gb_module_create);
+
+/*
+ * Occurs after the last reference to a module has been dropped.
+ */
+DEFINE_MODULE_EVENT(gb_module_release);
+
+/*
+ * Occurs after a module is successfully created, before registering
+ * any of its interfaces.
+ */
+DEFINE_MODULE_EVENT(gb_module_add);
+
+/*
+ * Occurs when a module is deleted, before deregistering its
+ * interfaces.
+ */
+DEFINE_MODULE_EVENT(gb_module_del);
+
+#undef DEFINE_MODULE_EVENT
+
+DECLARE_EVENT_CLASS(gb_host_device,
+
+	TP_PROTO(struct gb_host_device *hd),
+
+	TP_ARGS(hd),
+
+	TP_STRUCT__entry(
+		__field(int, bus_id)
+		__field(size_t, num_cports)
+		__field(size_t, buffer_size_max)
+	),
+
+	TP_fast_assign(
+		__entry->bus_id = hd->bus_id;
+		__entry->num_cports = hd->num_cports;
+		__entry->buffer_size_max = hd->buffer_size_max;
+	),
+
+	TP_printk("bus_id=%d num_cports=%zu mtu=%zu",
+		__entry->bus_id, __entry->num_cports,
+		__entry->buffer_size_max)
+);
+
+#define DEFINE_HD_EVENT(name)						\
+		DEFINE_EVENT(gb_host_device, name,			\
+				TP_PROTO(struct gb_host_device *hd),	\
+				TP_ARGS(hd))
+
+/*
+ * Occurs after a new host device is successfully created, before
+ * its SVC has been set up.
+ */
+DEFINE_HD_EVENT(gb_hd_create);
+
+/*
+ * Occurs after the last reference to a host device has been
+ * dropped.
+ */
+DEFINE_HD_EVENT(gb_hd_release);
+
+/*
+ * Occurs after a new host device has been added, after the
+ * connection to its SVC has been enabled.
+ */
+DEFINE_HD_EVENT(gb_hd_add);
+
+/*
+ * Occurs when a host device is being disconnected from the AP USB
+ * host controller.
+ */
+DEFINE_HD_EVENT(gb_hd_del);
+
+/*
+ * Occurs when a host device has passed received data to the Greybus
+ * core, after it has been determined it is destined for a valid
+ * CPort.
+ */
+DEFINE_HD_EVENT(gb_hd_in);
+
+#undef DEFINE_HD_EVENT
+
+#endif /* _TRACE_GREYBUS_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+/*
+ * TRACE_INCLUDE_FILE is not needed if the filename and TRACE_SYSTEM are equal
+ */
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE greybus_trace
+#include <trace/define_trace.h>
+