[PATCH] RapidIO support: core base

Adds a RapidIO subsystem to the kernel.  RIO is a switched fabric interconnect
used in higher-end embedded applications.  The curious can look at the specs
over at http://www.rapidio.org

The core code implements enumeration/discovery, management of
devices/resources, and interfaces for RIO drivers.

There's a lot more to do to take advantages of all the hardware features.
However, this should provide a good base for folks with RIO hardware to start
contributing.

Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h
new file mode 100644
index 0000000..f865a68
--- /dev/null
+++ b/drivers/rapidio/rio.h
@@ -0,0 +1,57 @@
+/*
+ * RapidIO interconnect services
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/rio.h>
+
+/* Functions internal to the RIO core code */
+
+extern u32 rio_mport_get_feature(struct rio_mport *mport, int local, u16 destid,
+				 u8 hopcount, int ftr);
+extern int rio_create_sysfs_dev_files(struct rio_dev *rdev);
+extern int rio_enum_mport(struct rio_mport *mport);
+extern int rio_disc_mport(struct rio_mport *mport);
+
+/* Structures internal to the RIO core code */
+extern struct device_attribute rio_dev_attrs[];
+extern spinlock_t rio_global_list_lock;
+
+/* Helpers internal to the RIO core code */
+#define DECLARE_RIO_ROUTE_SECTION(section, vid, did, add_hook, get_hook)  \
+        static struct rio_route_ops __rio_route_ops __attribute_used__   \
+	        __attribute__((__section__(#section))) = { vid, did, add_hook, get_hook };
+
+/**
+ * DECLARE_RIO_ROUTE_OPS - Registers switch routing operations
+ * @vid: RIO vendor ID
+ * @did: RIO device ID
+ * @add_hook: Callback that adds a route entry
+ * @get_hook: Callback that gets a route entry
+ *
+ * Manipulating switch route tables in RIO is switch specific. This
+ * registers a switch by vendor and device ID with two callbacks for
+ * modifying and retrieving route entries in a switch. A &struct
+ * rio_route_ops is initialized with the ops and placed into a
+ * RIO-specific kernel section.
+ */
+#define DECLARE_RIO_ROUTE_OPS(vid, did, add_hook, get_hook)		\
+	DECLARE_RIO_ROUTE_SECTION(.rio_route_ops,			\
+			vid, did, add_hook, get_hook)
+
+#ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT
+#define RIO_GET_DID(x)	((x & 0x00ff0000) >> 16)
+#define RIO_SET_DID(x)	((x & 0x000000ff) << 16)
+#else
+#define RIO_GET_DID(x)	(x & 0xffff)
+#define RIO_SET_DID(x)	(x & 0xffff)
+#endif