Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 111 insertions, 0 deletions

diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h
new file mode 100644
index 000000000..4d3398eff
--- /dev/null
+++ b/drivers/xen/events/events_internal.h
@@ -0,0 +1,111 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Xen Event Channels (internal header)
+ *
+ * Copyright (C) 2013 Citrix Systems R&D Ltd.
+ */
+#ifndef __EVENTS_INTERNAL_H__
+#define __EVENTS_INTERNAL_H__
+
+struct evtchn_loop_ctrl;
+
+struct evtchn_ops {
+	unsigned (*max_channels)(void);
+	unsigned (*nr_channels)(void);
+
+	int (*setup)(evtchn_port_t port);
+	void (*remove)(evtchn_port_t port, unsigned int cpu);
+	void (*bind_to_cpu)(evtchn_port_t evtchn, unsigned int cpu,
+			    unsigned int old_cpu);
+
+	void (*clear_pending)(evtchn_port_t port);
+	void (*set_pending)(evtchn_port_t port);
+	bool (*is_pending)(evtchn_port_t port);
+	void (*mask)(evtchn_port_t port);
+	void (*unmask)(evtchn_port_t port);
+
+	void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
+	void (*resume)(void);
+
+	int (*percpu_init)(unsigned int cpu);
+	int (*percpu_deinit)(unsigned int cpu);
+};
+
+extern const struct evtchn_ops *evtchn_ops;
+
+int get_evtchn_to_irq(evtchn_port_t evtchn);
+void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
+
+unsigned int cpu_from_evtchn(evtchn_port_t evtchn);
+
+static inline unsigned xen_evtchn_max_channels(void)
+{
+	return evtchn_ops->max_channels();
+}
+
+/*
+ * Do any ABI specific setup for a bound event channel before it can
+ * be unmasked and used.
+ */
+static inline int xen_evtchn_port_setup(evtchn_port_t evtchn)
+{
+	if (evtchn_ops->setup)
+		return evtchn_ops->setup(evtchn);
+	return 0;
+}
+
+static inline void xen_evtchn_port_remove(evtchn_port_t evtchn,
+					  unsigned int cpu)
+{
+	if (evtchn_ops->remove)
+		evtchn_ops->remove(evtchn, cpu);
+}
+
+static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,
+					       unsigned int cpu,
+					       unsigned int old_cpu)
+{
+	evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu);
+}
+
+static inline void clear_evtchn(evtchn_port_t port)
+{
+	evtchn_ops->clear_pending(port);
+}
+
+static inline void set_evtchn(evtchn_port_t port)
+{
+	evtchn_ops->set_pending(port);
+}
+
+static inline bool test_evtchn(evtchn_port_t port)
+{
+	return evtchn_ops->is_pending(port);
+}
+
+static inline void mask_evtchn(evtchn_port_t port)
+{
+	return evtchn_ops->mask(port);
+}
+
+static inline void unmask_evtchn(evtchn_port_t port)
+{
+	return evtchn_ops->unmask(port);
+}
+
+static inline void xen_evtchn_handle_events(unsigned cpu,
+					    struct evtchn_loop_ctrl *ctrl)
+{
+	return evtchn_ops->handle_events(cpu, ctrl);
+}
+
+static inline void xen_evtchn_resume(void)
+{
+	if (evtchn_ops->resume)
+		evtchn_ops->resume();
+}
+
+void xen_evtchn_2l_init(void);
+int xen_evtchn_fifo_init(void);
+
+#endif /* #ifndef __EVENTS_INTERNAL_H__ */