[Xen-devel] [RFC 05/11] Import fwnode.h from linux

[manish.jaggi@xxxxxxxxxx]

From: Manish Jaggi <manish.jaggi@xxxxxxxxxx>

Import fwnode.h from linux kernel tag v4.14

Signed-off-by: Manish Jaggi <manish.jaggi@xxxxxxxxxx>
---
 xen/include/xen/fwnode.h | 125 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)

diff --git a/xen/include/xen/fwnode.h b/xen/include/xen/fwnode.h
new file mode 100644
index 0000000000..af186a9dc6
--- /dev/null
+++ b/xen/include/xen/fwnode.h
@@ -0,0 +1,125 @@
+/*
+ * fwnode.h - Firmware device node object handle type definition.
+ *
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_FWNODE_H_
+#define _LINUX_FWNODE_H_
+
+#include <xen/types.h>
+
+struct fwnode_operations;
+
+struct fwnode_handle {
+       struct fwnode_handle *secondary;
+       const struct fwnode_operations *ops;
+};
+
+/**
+ * struct fwnode_endpoint - Fwnode graph endpoint
+ * @port: Port number
+ * @id: Endpoint id
+ * @local_fwnode: reference to the related fwnode
+ */
+struct fwnode_endpoint {
+       unsigned int port;
+       unsigned int id;
+       const struct fwnode_handle *local_fwnode;
+};
+
+#define NR_FWNODE_REFERENCE_ARGS       8
+
+/**
+ * struct fwnode_reference_args - Fwnode reference with additional arguments
+ * @fwnode:- A reference to the base fwnode
+ * @nargs: Number of elements in @args array
+ * @args: Integer arguments on the fwnode
+ */
+struct fwnode_reference_args {
+       struct fwnode_handle *fwnode;
+       unsigned int nargs;
+       unsigned int args[NR_FWNODE_REFERENCE_ARGS];
+};
+
+/**
+ * struct fwnode_operations - Operations for fwnode interface
+ * @get: Get a reference to an fwnode.
+ * @put: Put a reference to an fwnode.
+ * @property_present: Return true if a property is present.
+ * @property_read_integer_array: Read an array of integer properties. Return
+ *                              zero on success, a negative error code
+ *                              otherwise.
+ * @property_read_string_array: Read an array of string properties. Return zero
+ *                             on success, a negative error code otherwise.
+ * @get_parent: Return the parent of an fwnode.
+ * @get_next_child_node: Return the next child node in an iteration.
+ * @get_named_child_node: Return a child node with a given name.
+ * @get_reference_args: Return a reference pointed to by a property, with args
+ * @graph_get_next_endpoint: Return an endpoint node in an iteration.
+ * @graph_get_remote_endpoint: Return the remote endpoint node of a local
+ *                            endpoint node.
+ * @graph_get_port_parent: Return the parent node of a port node.
+ * @graph_parse_endpoint: Parse endpoint for port and endpoint id.
+ */
+struct fwnode_operations {
+       void (*get)(struct fwnode_handle *fwnode);
+       void (*put)(struct fwnode_handle *fwnode);
+       bool (*device_is_available)(const struct fwnode_handle *fwnode);
+       bool (*property_present)(const struct fwnode_handle *fwnode,
+                                const char *propname);
+       int (*property_read_int_array)(const struct fwnode_handle *fwnode,
+                                      const char *propname,
+                                      unsigned int elem_size, void *val,
+                                      size_t nval);
+       int
+       (*property_read_string_array)(const struct fwnode_handle *fwnode_handle,
+                                     const char *propname, const char **val,
+                                     size_t nval);
+       struct fwnode_handle *(*get_parent)(const struct fwnode_handle *fwnode);
+       struct fwnode_handle *
+       (*get_next_child_node)(const struct fwnode_handle *fwnode,
+                              struct fwnode_handle *child);
+       struct fwnode_handle *
+       (*get_named_child_node)(const struct fwnode_handle *fwnode,
+                               const char *name);
+       int (*get_reference_args)(const struct fwnode_handle *fwnode,
+                                 const char *prop, const char *nargs_prop,
+                                 unsigned int nargs, unsigned int index,
+                                 struct fwnode_reference_args *args);
+       struct fwnode_handle *
+       (*graph_get_next_endpoint)(const struct fwnode_handle *fwnode,
+                                  struct fwnode_handle *prev);
+       struct fwnode_handle *
+       (*graph_get_remote_endpoint)(const struct fwnode_handle *fwnode);
+       struct fwnode_handle *
+       (*graph_get_port_parent)(struct fwnode_handle *fwnode);
+       int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode,
+                                   struct fwnode_endpoint *endpoint);
+};
+
+#define fwnode_has_op(fwnode, op)                              \
+       ((fwnode) && (fwnode)->ops && (fwnode)->ops->op)
+#define fwnode_call_int_op(fwnode, op, ...)                            \
+       (fwnode ? (fwnode_has_op(fwnode, op) ?                          \
+                  (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : -ENXIO) : \
+        -EINVAL)
+#define fwnode_call_bool_op(fwnode, op, ...)                           \
+       (fwnode ? (fwnode_has_op(fwnode, op) ?                          \
+                  (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : false) : \
+        false)
+#define fwnode_call_ptr_op(fwnode, op, ...)            \
+       (fwnode_has_op(fwnode, op) ?                    \
+        (fwnode)->ops->op(fwnode, ## __VA_ARGS__) : NULL)
+#define fwnode_call_void_op(fwnode, op, ...)                           \
+       do {                                                            \
+               if (fwnode_has_op(fwnode, op))                          \
+                       (fwnode)->ops->op(fwnode, ## __VA_ARGS__);      \
+       } while (false)
+
+#endif
-- 
2.14.1


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel