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* [PATCH][1/5] RapidIO support: core
@ 2005-06-02 21:03 Matt Porter
  2005-06-02 21:12 ` [PATCH][2/5] RapidIO support: core includes Matt Porter
                   ` (2 more replies)
  0 siblings, 3 replies; 13+ messages in thread
From: Matt Porter @ 2005-06-02 21:03 UTC (permalink / raw)
  To: torvalds, akpm, greg; +Cc: linux-kernel, linuxppc-embedded

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>

Index: Documentation/DocBook/Makefile
===================================================================
--- 3c5e9440c6a37c3355b50608836a23c8fa4eec99/Documentation/DocBook/Makefile  (mode:100644)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/Documentation/DocBook/Makefile  (mode:100644)
@@ -10,7 +10,7 @@
 	    kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
 	    procfs-guide.xml writing_usb_driver.xml scsidrivers.xml \
 	    sis900.xml kernel-api.xml journal-api.xml lsm.xml usb.xml \
-	    gadget.xml libata.xml mtdnand.xml librs.xml
+	    gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml
 
 ###
 # The build process is as follows (targets):
Index: Documentation/DocBook/rapidio.tmpl
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/Documentation/DocBook/rapidio.tmpl  (mode:100644)
@@ -0,0 +1,160 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+        "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
+	<!ENTITY rapidio SYSTEM "rapidio.xml">
+	]>
+
+<book id="RapidIO-Guide">
+ <bookinfo>
+  <title>RapidIO Subsystem Guide</title>
+  
+  <authorgroup>
+   <author>
+    <firstname>Matt</firstname>
+    <surname>Porter</surname>
+    <affiliation>
+     <address>
+      <email>mporter@kernel.crashing.org</email>
+      <email>mporter@mvista.com</email>
+     </address>
+    </affiliation>
+   </author>
+  </authorgroup>
+
+  <copyright>
+   <year>2005</year>
+   <holder>MontaVista Software, Inc.</holder>
+  </copyright>
+
+  <legalnotice>
+   <para>
+     This documentation 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.
+   </para>
+      
+   <para>
+     This program is distributed in the hope that it will be
+     useful, but WITHOUT ANY WARRANTY; without even the implied
+     warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+     See the GNU General Public License for more details.
+   </para>
+      
+   <para>
+     You should have received a copy of the GNU General Public
+     License along with this program; if not, write to the Free
+     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+     MA 02111-1307 USA
+   </para>
+      
+   <para>
+     For more details see the file COPYING in the source
+     distribution of Linux.
+   </para>
+  </legalnotice>
+ </bookinfo>
+
+<toc></toc>
+
+  <chapter id="intro">
+      <title>Introduction</title>
+  <para>
+	RapidIO is a high speed switched fabric interconnect with
+	features aimed at the embedded market.  RapidIO provides
+	support for memory-mapped I/O as well as message-based
+	transactions over the switched fabric network. RapidIO has
+	a standardized discovery mechanism not unlike the PCI bus
+	standard that allows simple detection of devices in a
+	network.
+  </para>
+  <para>
+  	This documentation is provided for developers intending
+	to support RapidIO on new architectures, write new drivers,
+	or to understand the subsystem internals.
+  </para>
+  </chapter>
+  
+  <chapter id="bugs">
+     <title>Known Bugs and Limitations</title>
+
+     <sect1>
+     	<title>Bugs</title>
+	  <para>None. ;)</para>
+     </sect1>
+     <sect1>
+     	<title>Limitations</title>
+	  <para>
+	    <orderedlist>
+	      <listitem><para>Access/management of RapidIO memory regions is not supported</para></listitem>
+	      <listitem><para>Multiple host enumeration is not supported</para></listitem>
+	    </orderedlist>
+	 </para>
+     </sect1>
+  </chapter>
+
+  <chapter id="drivers">
+     	<title>RapidIO driver interface</title>
+	<para>
+		Drivers are provided a set of calls in order
+		to interface with the subsystem to gather info
+		on devices, request/map memory region resources,
+		and manage mailboxes/doorbells.
+	</para>
+	<sect1>
+		<title>Functions</title>
+!Iinclude/linux/rio_drv.h
+!Edrivers/rio/rio-driver.c
+!Edrivers/rio/rio.c
+	</sect1>
+  </chapter>	
+
+  <chapter id="internals">
+     <title>Internals</title>
+
+     <para>
+     This chapter contains the autogenerated documentation of the RapidIO
+     subsystem.
+     </para>
+
+     <sect1><title>Structures</title>
+!Iinclude/linux/rio.h
+     </sect1>
+     <sect1><title>Enumeration and Discovery</title>
+!Idrivers/rio/rio-scan.c
+     </sect1>
+     <sect1><title>Driver functionality</title>
+!Idrivers/rio/rio.c
+!Idrivers/rio/rio-access.c
+     </sect1>
+     <sect1><title>Device model support</title>
+!Idrivers/rio/rio-driver.c
+     </sect1>
+     <sect1><title>Sysfs support</title>
+!Idrivers/rio/rio-sysfs.c
+     </sect1>
+     <sect1><title>PPC32 support</title>
+!Iarch/ppc/kernel/rio.c
+!Earch/ppc/syslib/ppc85xx_rio.c
+!Iarch/ppc/syslib/ppc85xx_rio.c
+     </sect1>
+  </chapter>
+
+  <chapter id="credits">
+     <title>Credits</title>
+	<para>
+		The following people have contributed to the RapidIO
+		subsystem directly or indirectly:
+		<orderedlist>
+			<listitem><para>Matt Porter<email>mporter@kernel.crashing.org</email></para></listitem>
+			<listitem><para>Randy Vinson<email>rvinson@mvista.com</email></para></listitem>
+			<listitem><para>Dan Malek<email>dan@embeddedalley.com</email></para></listitem>
+		</orderedlist>
+	</para>
+	<para>
+		The following people have contributed to this document:
+		<orderedlist>
+			<listitem><para>Matt Porter<email>mporter@kernel.crashing.org</email></para></listitem>
+		</orderedlist>
+	</para>
+  </chapter>
+</book>
Index: drivers/Makefile
===================================================================
--- 3c5e9440c6a37c3355b50608836a23c8fa4eec99/drivers/Makefile  (mode:100644)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/Makefile  (mode:100644)
@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_PCI)		+= pci/
 obj-$(CONFIG_PARISC)		+= parisc/
+obj-$(CONFIG_RAPIDIO)		+= rio/
 obj-y				+= video/
 obj-$(CONFIG_ACPI_BOOT)		+= acpi/
 # PnP must come after ACPI since it will eventually need to check if acpi
Index: drivers/rio/Kconfig
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/Kconfig  (mode:100644)
@@ -0,0 +1,18 @@
+#
+# RapidIO configuration
+#
+config RAPIDIO_8_BIT_TRANSPORT
+	bool "8-bit transport addressing"
+	depends on RAPIDIO
+	---help---
+	  By default, the kernel assumes a 16-bit addressed RapidIO
+	  network. By selecting this option, the kernel will support
+	  an 8-bit addressed network.
+
+config RAPIDIO_DISC_TIMEOUT
+	int "Discovery timeout duration (seconds)"
+	depends on RAPIDIO
+	default "30"
+	---help---
+	  Amount of time a discovery node waits for a host to complete
+	  enumeration beforing giving up.
Index: drivers/rio/Makefile
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/Makefile  (mode:100644)
@@ -0,0 +1,6 @@
+#
+# Makefile for RapidIO interconnect services
+#
+obj-y += rio.o rio-access.o rio-driver.o rio-scan.o rio-sysfs.o
+
+obj-$(CONFIG_RAPIDIO)		+= switches/
Index: drivers/rio/rio-access.c
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/rio-access.c  (mode:100644)
@@ -0,0 +1,175 @@
+/*
+ * RapidIO configuration space access support
+ *
+ * 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/rio.h>
+#include <linux/module.h>
+
+/*
+ * These interrupt-safe spinlocks protect all accesses to RIO
+ * configuration space and doorbell access.
+ */
+static spinlock_t rio_config_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t rio_doorbell_lock = SPIN_LOCK_UNLOCKED;
+
+/*
+ *  Wrappers for all RIO configuration access functions.  They just check
+ *  alignment, do locking and call the low-level functions pointed to
+ *  by rio_mport->ops.
+ */
+
+#define RIO_8_BAD 0
+#define RIO_16_BAD (offset & 1)
+#define RIO_32_BAD (offset & 3)
+
+/**
+ * RIO_LOP_READ - Generate rio_local_read_config_* functions
+ * @size: Size of configuration space read (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space read (1, 2, 4 bytes)
+ *
+ * Generates rio_local_read_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_LOP_READ(size,type,len) \
+int __rio_local_read_config_##size \
+	(struct rio_mport *mport, u32 offset, type *value)		\
+{									\
+	int res;							\
+	unsigned long flags;						\
+	u32 data = 0;							\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	spin_lock_irqsave(&rio_config_lock, flags);			\
+	res = mport->ops->lcread(mport->id, offset, len, &data);	\
+	*value = (type)data;						\
+	spin_unlock_irqrestore(&rio_config_lock, flags);		\
+	return res;							\
+}
+
+/**
+ * RIO_LOP_WRITE - Generate rio_local_write_config_* functions
+ * @size: Size of configuration space write (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space write (1, 2, 4 bytes)
+ *
+ * Generates rio_local_write_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_LOP_WRITE(size,type,len) \
+int __rio_local_write_config_##size \
+	(struct rio_mport *mport, u32 offset, type value)		\
+{									\
+	int res;							\
+	unsigned long flags;						\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	spin_lock_irqsave(&rio_config_lock, flags);			\
+	res = mport->ops->lcwrite(mport->id, offset, len, value);	\
+	spin_unlock_irqrestore(&rio_config_lock, flags);		\
+	return res;							\
+}
+
+RIO_LOP_READ(8, u8, 1)
+    RIO_LOP_READ(16, u16, 2)
+    RIO_LOP_READ(32, u32, 4)
+    RIO_LOP_WRITE(8, u8, 1)
+    RIO_LOP_WRITE(16, u16, 2)
+    RIO_LOP_WRITE(32, u32, 4)
+
+    EXPORT_SYMBOL(__rio_local_read_config_8);
+EXPORT_SYMBOL(__rio_local_read_config_16);
+EXPORT_SYMBOL(__rio_local_read_config_32);
+EXPORT_SYMBOL(__rio_local_write_config_8);
+EXPORT_SYMBOL(__rio_local_write_config_16);
+EXPORT_SYMBOL(__rio_local_write_config_32);
+
+/**
+ * RIO_OP_READ - Generate rio_mport_read_config_* functions
+ * @size: Size of configuration space read (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space read (1, 2, 4 bytes)
+ *
+ * Generates rio_mport_read_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_OP_READ(size,type,len) \
+int rio_mport_read_config_##size \
+	(struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type *value)	\
+{									\
+	int res;							\
+	unsigned long flags;						\
+	u32 data = 0;							\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	spin_lock_irqsave(&rio_config_lock, flags);			\
+	res = mport->ops->cread(mport->id, destid, hopcount, offset, len, &data); \
+	*value = (type)data;						\
+	spin_unlock_irqrestore(&rio_config_lock, flags);		\
+	return res;							\
+}
+
+/**
+ * RIO_OP_WRITE - Generate rio_mport_write_config_* functions
+ * @size: Size of configuration space write (8, 16, 32 bits)
+ * @type: C type of value argument
+ * @len: Length of configuration space write (1, 2, 4 bytes)
+ *
+ * Generates rio_mport_write_config_* functions used to access
+ * configuration space registers on the local device.
+ */
+#define RIO_OP_WRITE(size,type,len) \
+int rio_mport_write_config_##size \
+	(struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type value)	\
+{									\
+	int res;							\
+	unsigned long flags;						\
+	if (RIO_##size##_BAD) return RIO_BAD_SIZE;			\
+	spin_lock_irqsave(&rio_config_lock, flags);			\
+	res = mport->ops->cwrite(mport->id, destid, hopcount, offset, len, value); \
+	spin_unlock_irqrestore(&rio_config_lock, flags);		\
+	return res;							\
+}
+
+RIO_OP_READ(8, u8, 1)
+    RIO_OP_READ(16, u16, 2)
+    RIO_OP_READ(32, u32, 4)
+    RIO_OP_WRITE(8, u8, 1)
+    RIO_OP_WRITE(16, u16, 2)
+    RIO_OP_WRITE(32, u32, 4)
+
+    EXPORT_SYMBOL(rio_mport_read_config_8);
+EXPORT_SYMBOL(rio_mport_read_config_16);
+EXPORT_SYMBOL(rio_mport_read_config_32);
+EXPORT_SYMBOL(rio_mport_write_config_8);
+EXPORT_SYMBOL(rio_mport_write_config_16);
+EXPORT_SYMBOL(rio_mport_write_config_32);
+
+/**
+ * rio_mport_send_doorbell - Send a doorbell message
+ *
+ * @mport: RIO master port
+ * @destid: RIO device destination ID
+ * @data: Doorbell message data
+ *
+ * Send a doorbell message to a RIO device. The doorbell message
+ * has a 16-bit info field provided by the data argument.
+ */
+int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data)
+{
+	int res;
+	unsigned long flags;
+
+	spin_lock_irqsave(&rio_doorbell_lock, flags);
+	res = mport->ops->dsend(mport->id, destid, data);
+	spin_unlock_irqrestore(&rio_doorbell_lock, flags);
+
+	return res;
+}
+
+EXPORT_SYMBOL(rio_mport_send_doorbell);
Index: drivers/rio/rio-driver.c
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/rio-driver.c  (mode:100644)
@@ -0,0 +1,229 @@
+/*
+ * RapidIO driver support
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/rio.h>
+#include <linux/rio_ids.h>
+
+#include "rio.h"
+
+/**
+ *  rio_match_device - Tell if a RIO device has a matching RIO device id structure
+ *  @id: the RIO device id structure to match against
+ *  @rdev: the RIO device structure to match against
+ *
+ *  Used from driver probe and bus matching to check whether a RIO device
+ *  matches a device id structure provided by a RIO driver. Returns the
+ *  matching &struct rio_device_id or %NULL if there is no match.
+ */
+static const struct rio_device_id *rio_match_device(const struct rio_device_id
+						    *id,
+						    const struct rio_dev *rdev)
+{
+	while (id->vid || id->asm_vid) {
+		if (((id->vid == RIO_ANY_ID) || (id->vid == rdev->vid)) &&
+		    ((id->did == RIO_ANY_ID) || (id->did == rdev->did)) &&
+		    ((id->asm_vid == RIO_ANY_ID)
+		     || (id->asm_vid == rdev->asm_vid))
+		    && ((id->asm_did == RIO_ANY_ID)
+			|| (id->asm_did == rdev->asm_did)))
+			return id;
+		id++;
+	}
+	return NULL;
+}
+
+/**
+ * rio_dev_get - Increments the reference count of the RIO device structure
+ *
+ * @rdev: RIO device being referenced
+ *
+ * Each live reference to a device should be refcounted.
+ *
+ * Drivers for RIO devices should normally record such references in
+ * their probe() methods, when they bind to a device, and release
+ * them by calling rio_dev_put(), in their disconnect() methods.
+ */
+struct rio_dev *rio_dev_get(struct rio_dev *rdev)
+{
+	if (rdev)
+		get_device(&rdev->dev);
+
+	return rdev;
+}
+
+/**
+ * rio_dev_put - Release a use of the RIO device structure
+ *
+ * @rdev: RIO device being disconnected
+ *
+ * Must be called when a user of a device is finished with it.
+ * When the last user of the device calls this function, the
+ * memory of the device is freed.
+ */
+void rio_dev_put(struct rio_dev *rdev)
+{
+	if (rdev)
+		put_device(&rdev->dev);
+}
+
+/**
+ *  rio_device_probe - Tell if a RIO device structure has a matching RIO
+ *                     device id structure
+ *  @id: the RIO device id structure to match against
+ *  @dev: the RIO device structure to match against
+ *
+ * return 0 and set rio_dev->driver when drv claims rio_dev, else error
+ */
+static int rio_device_probe(struct device *dev)
+{
+	struct rio_driver *rdrv = to_rio_driver(dev->driver);
+	struct rio_dev *rdev = to_rio_dev(dev);
+	int error = -ENODEV;
+	const struct rio_device_id *id;
+
+	if (!rdev->driver && rdrv->probe) {
+		if (!rdrv->id_table)
+			return error;
+		id = rio_match_device(rdrv->id_table, rdev);
+		rio_dev_get(rdev);
+		if (id)
+			error = rdrv->probe(rdev, id);
+		if (error >= 0) {
+			rdev->driver = rdrv;
+			error = 0;
+			rio_dev_put(rdev);
+		}
+	}
+	return error;
+}
+
+/**
+ *  rio_device_remove - Remove a RIO device from the system
+ *
+ *  @dev: the RIO device structure to match against
+ *
+ * Remove a RIO device from the system. If it has an associated
+ * driver, then run the driver remove() method.  Then update
+ * the reference count.
+ */
+static int rio_device_remove(struct device *dev)
+{
+	struct rio_dev *rdev = to_rio_dev(dev);
+	struct rio_driver *rdrv = rdev->driver;
+
+	if (rdrv) {
+		if (rdrv->remove)
+			rdrv->remove(rdev);
+		rdev->driver = NULL;
+	}
+
+	rio_dev_put(rdev);
+
+	return 0;
+}
+
+/**
+ *  rio_register_driver - register a new RIO driver
+ *  @rdrv: the RIO driver structure to register
+ *
+ *  Adds a &struct rio_driver to the list of registered drivers
+ *  Returns a negative value on error, otherwise 0. If no error
+ *  occurred, the driver remains registered even if no device
+ *  was claimed during registration.
+ */
+int rio_register_driver(struct rio_driver *rdrv)
+{
+	/* initialize common driver fields */
+	rdrv->driver.name = rdrv->name;
+	rdrv->driver.bus = &rio_bus_type;
+	rdrv->driver.probe = rio_device_probe;
+	rdrv->driver.remove = rio_device_remove;
+
+	/* register with core */
+	return driver_register(&rdrv->driver);
+}
+
+/**
+ *  rio_unregister_driver - unregister a RIO driver
+ *  @rdrv: the RIO driver structure to unregister
+ *
+ *  Deletes the &struct rio_driver from the list of registered RIO
+ *  drivers, gives it a chance to clean up by calling its remove()
+ *  function for each device it was responsible for, and marks those
+ *  devices as driverless.
+ */
+void rio_unregister_driver(struct rio_driver *rdrv)
+{
+	driver_unregister(&rdrv->driver);
+}
+
+/**
+ *  rio_match_bus - Tell if a RIO device structure has a matching RIO
+ *                  driver device id structure
+ *  @dev: the standard device structure to match against
+ *  @drv: the standard driver structure containing the ids to match against
+ *
+ *  Used by a driver to check whether a RIO device present in the
+ *  system is in its list of supported devices. Returns 1 if
+ *  there is a matching &struct rio_device_id or 0 if there is
+ *  no match.
+ */
+static int rio_match_bus(struct device *dev, struct device_driver *drv)
+{
+	struct rio_dev *rdev = to_rio_dev(dev);
+	struct rio_driver *rdrv = to_rio_driver(drv);
+	const struct rio_device_id *id = rdrv->id_table;
+	const struct rio_device_id *found_id;
+
+	if (!id)
+		goto out;
+
+	found_id = rio_match_device(id, rdev);
+
+	if (found_id)
+		return 1;
+
+      out:return 0;
+}
+
+static struct device rio_bus = {
+	.bus_id = "rapidio",
+};
+
+struct bus_type rio_bus_type = {
+	.name = "rapidio",
+	.match = rio_match_bus,
+	.dev_attrs = rio_dev_attrs
+};
+
+/**
+ *  rio_bus_init - Register the RapidIO bus with the device model
+ *
+ *  Registers the RIO bus device and RIO bus type with the Linux
+ *  device model.
+ */
+static int __init rio_bus_init(void)
+{
+	if (device_register(&rio_bus) < 0)
+		printk("RIO: failed to register RIO bus device\n");
+	return bus_register(&rio_bus_type);
+}
+
+postcore_initcall(rio_bus_init);
+
+EXPORT_SYMBOL(rio_register_driver);
+EXPORT_SYMBOL(rio_unregister_driver);
+EXPORT_SYMBOL(rio_bus_type);
+EXPORT_SYMBOL(rio_dev_get);
+EXPORT_SYMBOL(rio_dev_put);
Index: drivers/rio/rio-sysfs.c
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/rio-sysfs.c  (mode:100644)
@@ -0,0 +1,196 @@
+/*
+ * RapidIO sysfs attributes and support
+ *
+ * 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/config.h>
+#include <linux/kernel.h>
+#include <linux/rio.h>
+#include <linux/rio_drv.h>
+#include <linux/stat.h>
+
+#include "rio.h"
+
+/* Sysfs support */
+#define rio_config_attr(field, format_string)					\
+static ssize_t								\
+	field##_show(struct device *dev, char *buf)			\
+{									\
+	struct rio_dev *rdev = to_rio_dev(dev);				\
+									\
+	return sprintf(buf, format_string, rdev->field);		\
+}									\
+
+rio_config_attr(did, "0x%04x\n");
+rio_config_attr(vid, "0x%04x\n");
+rio_config_attr(device_rev, "0x%08x\n");
+rio_config_attr(asm_did, "0x%04x\n");
+rio_config_attr(asm_vid, "0x%04x\n");
+rio_config_attr(asm_rev, "0x%04x\n");
+
+static ssize_t routes_show(struct device *dev, char *buf)
+{
+	struct rio_dev *rdev = to_rio_dev(dev);
+	char *str = buf;
+	int i;
+
+	if (!rdev->rswitch)
+		goto out;
+
+	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++) {
+		if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
+			continue;
+		str +=
+		    sprintf(str, "%04x %02x\n", i,
+			    rdev->rswitch->route_table[i]);
+	}
+
+      out:
+	return (str - buf);
+}
+
+struct device_attribute rio_dev_attrs[] = {
+	__ATTR_RO(did),
+	__ATTR_RO(vid),
+	__ATTR_RO(device_rev),
+	__ATTR_RO(asm_did),
+	__ATTR_RO(asm_vid),
+	__ATTR_RO(asm_rev),
+	__ATTR_RO(routes),
+	__ATTR_NULL,
+};
+
+static ssize_t
+rio_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+	struct rio_dev *dev =
+	    to_rio_dev(container_of(kobj, struct device, kobj));
+	unsigned int size = 0x100;
+	loff_t init_off = off;
+
+	/* Several chips lock up trying to read undefined config space */
+	if (capable(CAP_SYS_ADMIN))
+		size = 0x80000;
+
+	if (off > size)
+		return 0;
+	if (off + count > size) {
+		size -= off;
+		count = size;
+	} else {
+		size = count;
+	}
+
+	while (off & 3) {
+		unsigned char val;
+		rio_read_config_8(dev, off, &val);
+		buf[off - init_off] = val;
+		off++;
+		if (--size == 0)
+			break;
+	}
+
+	while (size > 3) {
+		unsigned int val;
+		rio_read_config_32(dev, off, &val);
+		buf[off - init_off] = (val >> 24) & 0xff;
+		buf[off - init_off + 1] = (val >> 16) & 0xff;
+		buf[off - init_off + 2] = (val >> 8) & 0xff;
+		buf[off - init_off + 3] = val & 0xff;
+		off += 4;
+		size -= 4;
+	}
+
+	while (size > 0) {
+		unsigned char val;
+		rio_read_config_8(dev, off, &val);
+		buf[off - init_off] = val;
+		off++;
+		--size;
+	}
+
+	return count;
+}
+
+static ssize_t
+rio_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+	struct rio_dev *dev =
+	    to_rio_dev(container_of(kobj, struct device, kobj));
+	unsigned int size = count;
+	loff_t init_off = off;
+
+	if (off > 0x200000)
+		return 0;
+	if (off + count > 0x200000) {
+		size = 0x200000 - off;
+		count = size;
+	}
+
+	while (off & 3) {
+		rio_write_config_8(dev, off, buf[off - init_off]);
+		off++;
+		if (--size == 0)
+			break;
+	}
+
+	while (size > 3) {
+		unsigned int val = buf[off - init_off + 3];
+		val |= (unsigned int)buf[off - init_off + 2] << 8;
+		val |= (unsigned int)buf[off - init_off + 1] << 16;
+		val |= (unsigned int)buf[off - init_off] << 24;
+		rio_write_config_32(dev, off, val);
+		off += 4;
+		size -= 4;
+	}
+
+	while (size > 0) {
+		rio_write_config_8(dev, off, buf[off - init_off]);
+		off++;
+		--size;
+	}
+
+	return count;
+}
+
+static struct bin_attribute rio_config_attr = {
+	.attr = {
+		 .name = "config",
+		 .mode = S_IRUGO | S_IWUSR,
+		 .owner = THIS_MODULE,
+		 },
+	.size = 0x200000,
+	.read = rio_read_config,
+	.write = rio_write_config,
+};
+
+/**
+ * rio_create_sysfs_dev_files - create RIO specific sysfs files
+ * @rdev: device whose entries should be created
+ *
+ * Create files when @rdev is added to sysfs.
+ */
+int rio_create_sysfs_dev_files(struct rio_dev *rdev)
+{
+	sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
+
+	return 0;
+}
+
+/**
+ * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
+ * @rdev: device whose entries we should free
+ *
+ * Cleanup when @rdev is removed from sysfs.
+ */
+void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
+{
+	sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
+}
Index: drivers/rio/rio.c
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/rio.c  (mode:100644)
@@ -0,0 +1,503 @@
+/*
+ * RapidIO interconnect services
+ * (RapidIO Interconnect Specification, http://www.rapidio.org)
+ *
+ * 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/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/rio.h>
+#include <linux/rio_drv.h>
+#include <linux/rio_ids.h>
+#include <linux/rio_regs.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+
+#include "rio.h"
+
+static LIST_HEAD(rio_mports);
+
+/**
+ * rio_local_get_device_id - Get the base/extended device id for a port
+ * @port: RIO master port from which to get the deviceid
+ *
+ * Reads the base/extended device id from the local device
+ * implementing the master port. Returns the 8/16-bit device
+ * id.
+ */
+u16 rio_local_get_device_id(struct rio_mport *port)
+{
+	u32 result;
+
+	rio_local_read_config_32(port, RIO_DID_CSR, &result);
+
+	return (RIO_GET_DID(result));
+}
+
+/**
+ * rio_request_inb_mbox - request inbound mailbox service
+ * @mport: RIO master port from which to allocate the mailbox resource
+ * @mbox: Mailbox number to claim
+ * @entries: Number of entries in inbound mailbox queue 
+ * @minb: Callback to execute when inbound message is received
+ *
+ * Requests ownership of an inbound mailbox resource and binds
+ * a callback function to the resource. Returns %0 on success.
+ */
+int rio_request_inb_mbox(struct rio_mport *mport,
+			 int mbox,
+			 int entries,
+			 void (*minb) (struct rio_mport * mport, int mbox,
+				       int slot))
+{
+	int rc = 0;
+
+	struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
+
+	if (res) {
+		rio_init_mbox_res(res, mbox, mbox);
+
+		/* Make sure this mailbox isn't in use */
+		if ((rc =
+		     request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
+				      res)) < 0) {
+			kfree(res);
+			goto out;
+		}
+
+		mport->inb_msg[mbox].res = res;
+
+		/* Hook the inbound message callback */
+		mport->inb_msg[mbox].mcback = minb;
+
+		rc = rio_open_inb_mbox(mport, mbox, entries);
+	} else
+		rc = -ENOMEM;
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_release_inb_mbox - release inbound mailbox message service
+ * @mport: RIO master port from which to release the mailbox resource
+ * @mbox: Mailbox number to release
+ *
+ * Releases ownership of an inbound mailbox resource. Returns 0
+ * if the request has been satisfied.
+ */
+int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
+{
+	rio_close_inb_mbox(mport, mbox);
+
+	/* Release the mailbox resource */
+	return release_resource(mport->inb_msg[mbox].res);
+}
+
+/**
+ * rio_request_outb_mbox - request outbound mailbox service
+ * @mport: RIO master port from which to allocate the mailbox resource
+ * @mbox: Mailbox number to claim
+ * @entries: Number of entries in outbound mailbox queue 
+ * @moutb: Callback to execute when outbound message is sent
+ *
+ * Requests ownership of an outbound mailbox resource and binds
+ * a callback function to the resource. Returns 0 on success.
+ */
+int rio_request_outb_mbox(struct rio_mport *mport,
+			  int mbox,
+			  int entries,
+			  void (*moutb) (struct rio_mport * mport, int mbox,
+					 int slot))
+{
+	int rc = 0;
+
+	struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
+
+	if (res) {
+		rio_init_mbox_res(res, mbox, mbox);
+
+		/* Make sure this outbound mailbox isn't in use */
+		if ((rc =
+		     request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
+				      res)) < 0) {
+			kfree(res);
+			goto out;
+		}
+
+		mport->outb_msg[mbox].res = res;
+
+		/* Hook the inbound message callback */
+		mport->outb_msg[mbox].mcback = moutb;
+
+		rc = rio_open_outb_mbox(mport, mbox, entries);
+	} else
+		rc = -ENOMEM;
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_release_outb_mbox - release outbound mailbox message service
+ * @mport: RIO master port from which to release the mailbox resource
+ * @mbox: Mailbox number to release
+ *
+ * Releases ownership of an inbound mailbox resource. Returns 0
+ * if the request has been satisfied.
+ */
+int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
+{
+	rio_close_outb_mbox(mport, mbox);
+
+	/* Release the mailbox resource */
+	return release_resource(mport->outb_msg[mbox].res);
+}
+
+/**
+ * rio_setup_inb_dbell - bind inbound doorbell callback
+ * @mport: RIO master port to bind the doorbell callback
+ * @res: Doorbell message resource
+ * @dinb: Callback to execute when doorbell is received
+ *
+ * Adds a doorbell resource/callback pair into a port's
+ * doorbell event list. Returns 0 if the request has been
+ * satisfied.
+ */
+static int
+rio_setup_inb_dbell(struct rio_mport *mport, struct resource *res,
+		    void (*dinb) (struct rio_mport * mport, u16 src, u16 dst,
+				  u16 info))
+{
+	int rc = 0;
+	struct rio_dbell *dbell;
+
+	if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	dbell->res = res;
+	dbell->dinb = dinb;
+
+	list_add_tail(&dbell->node, &mport->dbells);
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_request_inb_dbell - request inbound doorbell message service
+ * @mport: RIO master port from which to allocate the doorbell resource
+ * @start: Doorbell info range start
+ * @end: Doorbell info range end
+ * @dinb: Callback to execute when doorbell is received
+ *
+ * Requests ownership of an inbound doorbell resource and binds
+ * a callback function to the resource. Returns 0 if the request
+ * has been satisfied.
+ */
+int rio_request_inb_dbell(struct rio_mport *mport,
+			  u16 start,
+			  u16 end,
+			  void (*dinb) (struct rio_mport * mport, u16 src,
+					u16 dst, u16 info))
+{
+	int rc = 0;
+
+	struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
+
+	if (res) {
+		rio_init_dbell_res(res, start, end);
+
+		/* Make sure these doorbells aren't in use */
+		if ((rc =
+		     request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
+				      res)) < 0) {
+			kfree(res);
+			goto out;
+		}
+
+		/* Hook the doorbell callback */
+		rc = rio_setup_inb_dbell(mport, res, dinb);
+	} else
+		rc = -ENOMEM;
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_release_inb_dbell - release inbound doorbell message service
+ * @mport: RIO master port from which to release the doorbell resource
+ * @start: Doorbell info range start
+ * @end: Doorbell info range end
+ *
+ * Releases ownership of an inbound doorbell resource and removes
+ * callback from the doorbell event list. Returns 0 if the request
+ * has been satisfied.
+ */
+int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
+{
+	int rc = 0, found = 0;
+	struct rio_dbell *dbell;
+
+	list_for_each_entry(dbell, &mport->dbells, node) {
+		if ((dbell->res->start == start) && (dbell->res->end == end)) {
+			found = 1;
+			break;
+		}
+	}
+
+	/* If we can't find an exact match, fail */
+	if (!found) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/* Delete from list */
+	list_del(&dbell->node);
+
+	/* Release the doorbell resource */
+	rc = release_resource(dbell->res);
+
+	/* Free the doorbell event */
+	kfree(dbell);
+
+      out:
+	return rc;
+}
+
+/**
+ * rio_request_outb_dbell - request outbound doorbell message range
+ * @rdev: RIO device from which to allocate the doorbell resource
+ * @start: Doorbell message range start
+ * @end: Doorbell message range end
+ *
+ * Requests ownership of a doorbell message range. Returns a resource
+ * if the request has been satisfied or %NULL on failure.
+ */
+struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
+					u16 end)
+{
+	struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
+
+	if (res) {
+		rio_init_dbell_res(res, start, end);
+
+		/* Make sure these doorbells aren't in use */
+		if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
+		    < 0) {
+			kfree(res);
+			res = NULL;
+		}
+	}
+
+	return res;
+}
+
+/**
+ * rio_release_outb_dbell - release outbound doorbell message range
+ * @rdev: RIO device from which to release the doorbell resource
+ * @res: Doorbell resource to be freed
+ *
+ * Releases ownership of a doorbell message range. Returns 0 if the
+ * request has been satisfied.
+ */
+int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
+{
+	int rc = release_resource(res);
+
+	kfree(res);
+
+	return rc;
+}
+
+/**
+ * rio_mport_get_feature - query for devices' extended features
+ * @port: Master port to issue transaction
+ * @local: Indicate a local master port or remote device access
+ * @destid: Destination ID of the device
+ * @hopcount: Number of switch hops to the device
+ * @ftr: Extended feature code
+ *
+ * Tell if a device supports a given RapidIO capability.
+ * Returns the offset of the requested extended feature
+ * block within the device's RIO configuration space or
+ * 0 in case the device does not support it.  Possible
+ * values for @ftr:
+ *
+ * %RIO_EFB_PAR_EP_ID		LP/LVDS EP Devices
+ *
+ * %RIO_EFB_PAR_EP_REC_ID	LP/LVDS EP Recovery Devices
+ *
+ * %RIO_EFB_PAR_EP_FREE_ID	LP/LVDS EP Free Devices
+ *
+ * %RIO_EFB_SER_EP_ID		LP/Serial EP Devices
+ *
+ * %RIO_EFB_SER_EP_REC_ID	LP/Serial EP Recovery Devices
+ *
+ * %RIO_EFB_SER_EP_FREE_ID	LP/Serial EP Free Devices
+ */
+u32
+rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
+		      u8 hopcount, int ftr)
+{
+	u32 asm_info, ext_ftr_ptr, ftr_header;
+
+	if (local)
+		rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
+	else
+		rio_mport_read_config_32(port, destid, hopcount,
+					 RIO_ASM_INFO_CAR, &asm_info);
+
+	ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
+
+	while (ext_ftr_ptr) {
+		if (local)
+			rio_local_read_config_32(port, ext_ftr_ptr,
+						 &ftr_header);
+		else
+			rio_mport_read_config_32(port, destid, hopcount,
+						 ext_ftr_ptr, &ftr_header);
+		if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
+			return ext_ftr_ptr;
+		if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
+			break;
+	}
+
+	return 0;
+}
+
+/**
+ * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
+ * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
+ * @did: RIO did to match or %RIO_ANY_ID to match all dids
+ * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
+ * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
+ * @from: Previous RIO device found in search, or %NULL for new search
+ *
+ * Iterates through the list of known RIO devices. If a RIO device is
+ * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
+ * count to the device is incrememted and a pointer to its device
+ * structure is returned. Otherwise, %NULL is returned. A new search
+ * is initiated by passing %NULL to the @from argument. Otherwise, if
+ * @from is not %NULL, searches continue from next device on the global
+ * list. The reference count for @from is always decremented if it is
+ * not %NULL.
+ */
+struct rio_dev *rio_get_asm(u16 vid, u16 did,
+			    u16 asm_vid, u16 asm_did, struct rio_dev *from)
+{
+	struct list_head *n;
+	struct rio_dev *rdev;
+
+	WARN_ON(in_interrupt());
+	spin_lock(&rio_global_list_lock);
+	n = from ? from->global_list.next : rio_devices.next;
+
+	while (n && (n != &rio_devices)) {
+		rdev = rio_dev_g(n);
+		if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
+		    (did == RIO_ANY_ID || rdev->did == did) &&
+		    (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
+		    (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
+			goto exit;
+		n = n->next;
+	}
+	rdev = NULL;
+      exit:
+	rio_dev_put(from);
+	rdev = rio_dev_get(rdev);
+	spin_unlock(&rio_global_list_lock);
+	return rdev;
+}
+
+/**
+ * rio_get_device - Begin or continue searching for a RIO device by vid/did
+ * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
+ * @did: RIO did to match or %RIO_ANY_ID to match all dids
+ * @from: Previous RIO device found in search, or %NULL for new search
+ *
+ * Iterates through the list of known RIO devices. If a RIO device is
+ * found with a matching @vid and @did, the reference count to the
+ * device is incrememted and a pointer to its device structure is returned.
+ * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
+ * to the @from argument. Otherwise, if @from is not %NULL, searches
+ * continue from next device on the global list. The reference count for
+ * @from is always decremented if it is not %NULL.
+ */
+struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
+{
+	return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
+}
+
+static void rio_fixup_device(struct rio_dev *dev)
+{
+}
+
+static int __devinit rio_init(void)
+{
+	struct rio_dev *dev = NULL;
+
+	while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
+		rio_fixup_device(dev);
+	}
+	return 0;
+}
+
+device_initcall(rio_init);
+
+int rio_init_mports(void)
+{
+	int rc = 0;
+	struct rio_mport *port;
+
+	list_for_each_entry(port, &rio_mports, node) {
+		if (!request_mem_region(port->iores.start,
+					port->iores.end - port->iores.start,
+					port->name)) {
+			printk(KERN_ERR
+			       "RIO: Error requesting master port region %8.8lx-%8.8lx\n",
+			       port->iores.start, port->iores.end - 1);
+			rc = -ENOMEM;
+			goto out;
+		}
+
+		if (port->host_deviceid >= 0)
+			rio_enum_mport(port);
+		else
+			rio_disc_mport(port);
+	}
+
+      out:
+	return rc;
+}
+
+void rio_register_mport(struct rio_mport *port)
+{
+	list_add_tail(&port->node, &rio_mports);
+}
+
+EXPORT_SYMBOL(rio_local_get_device_id);
+EXPORT_SYMBOL(rio_get_device);
+EXPORT_SYMBOL(rio_get_asm);
+EXPORT_SYMBOL(rio_request_inb_dbell);
+EXPORT_SYMBOL(rio_release_inb_dbell);
+EXPORT_SYMBOL(rio_request_outb_dbell);
+EXPORT_SYMBOL(rio_release_outb_dbell);
+EXPORT_SYMBOL(rio_request_inb_mbox);
+EXPORT_SYMBOL(rio_release_inb_mbox);
+EXPORT_SYMBOL(rio_request_outb_mbox);
+EXPORT_SYMBOL(rio_release_outb_mbox);
Index: drivers/rio/rio.h
===================================================================
--- /dev/null  (tree:3c5e9440c6a37c3355b50608836a23c8fa4eec99)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/drivers/rio/rio.h  (mode:100644)
@@ -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
Index: include/asm-generic/vmlinux.lds.h
===================================================================
--- 3c5e9440c6a37c3355b50608836a23c8fa4eec99/include/asm-generic/vmlinux.lds.h  (mode:100644)
+++ ca27a54444320b5c022df402fce5cab0f3d9ea94/include/asm-generic/vmlinux.lds.h  (mode:100644)
@@ -32,6 +32,13 @@
 		VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;		\
 	}								\
 									\
+	/* RapidIO route ops */						\
+	.rio_route        : AT(ADDR(.rio_route) - LOAD_OFFSET) {	\
+		VMLINUX_SYMBOL(__start_rio_route_ops) = .;		\
+		*(.rio_route_ops)					\
+		VMLINUX_SYMBOL(__end_rio_route_ops) = .;		\
+	}								\
+									\
 	/* Kernel symbol table: Normal symbols */			\
 	__ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {		\
 		VMLINUX_SYMBOL(__start___ksymtab) = .;			\

^ permalink raw reply	[flat|nested] 13+ messages in thread
* [PATCH][5/5] RapidIO support: net driver over messaging
@ 2005-07-27 10:36 Avni Hillel-R58467
  2005-07-27 13:56 ` Matt Porter
  0 siblings, 1 reply; 13+ messages in thread
From: Avni Hillel-R58467 @ 2005-07-27 10:36 UTC (permalink / raw)
  To: 'linuxppc-embedded@ozlabs.org'

Hi Matt,

Two questions:

A. How can a node (not the host) know who is in the rionet to broadcast to them? 

B. How do you emulate broadcasting to all the mailboxes, in multi mbox systems? Is this done by the node getting the broadcast in MB 0 and forwarding it to the other MBs?

Regards,

Hillel

^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2005-07-27 13:56 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2005-06-02 21:03 [PATCH][1/5] RapidIO support: core Matt Porter
2005-06-02 21:12 ` [PATCH][2/5] RapidIO support: core includes Matt Porter
2005-06-02 21:19   ` [PATCH][3/5] RapidIO support: enumeration Matt Porter
2005-06-02 21:25     ` [PATCH][4/5] RapidIO support: ppc32 Matt Porter
2005-06-02 21:34       ` [PATCH][5/5] RapidIO support: net driver over messaging Matt Porter
2005-06-02 22:05         ` Stephen Hemminger
2005-06-03 22:43           ` Matt Porter
2005-06-03  7:11 ` [PATCH][1/5] RapidIO support: core Greg KH
2005-06-03 21:24   ` Matt Porter
2005-06-03  7:20 ` Greg KH
2005-06-03 21:35   ` Matt Porter
  -- strict thread matches above, loose matches on Subject: below --
2005-07-27 10:36 [PATCH][5/5] RapidIO support: net driver over messaging Avni Hillel-R58467
2005-07-27 13:56 ` Matt Porter

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