Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1732 insertions, 0 deletions

diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
new file mode 100644
index 000000000000..a1e30a66297b
--- /dev/null
+++ b/drivers/ieee1394/nodemgr.c
@@ -0,0 +1,1732 @@
+/*
+ * Node information (ConfigROM) collection and management.
+ *
+ * Copyright (C) 2000		Andreas E. Bombe
+ *               2001-2003	Ben Collins <bcollins@debian.net>
+ *
+ * This code is licensed under the GPL.  See the file COPYING in the root
+ * directory of the kernel sources for details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/config.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/kmod.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/moduleparam.h>
+#include <asm/atomic.h>
+
+#include "ieee1394_types.h"
+#include "ieee1394.h"
+#include "ieee1394_core.h"
+#include "hosts.h"
+#include "ieee1394_transactions.h"
+#include "highlevel.h"
+#include "csr.h"
+#include "nodemgr.h"
+
+static int ignore_drivers = 0;
+module_param(ignore_drivers, int, 0444);
+MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
+
+struct nodemgr_csr_info {
+	struct hpsb_host *host;
+	nodeid_t nodeid;
+	unsigned int generation;
+};
+
+
+static char *nodemgr_find_oui_name(int oui)
+{
+#ifdef CONFIG_IEEE1394_OUI_DB
+	extern struct oui_list_struct {
+		int oui;
+		char *name;
+	} oui_list[];
+	int i;
+
+	for (i = 0; oui_list[i].name; i++)
+		if (oui_list[i].oui == oui)
+			return oui_list[i].name;
+#endif
+	return NULL;
+}
+
+
+static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
+                            void *buffer, void *__ci)
+{
+	struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
+	int i, ret = 0;
+
+	for (i = 0; i < 3; i++) {
+		ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
+				buffer, length);
+		if (!ret)
+			break;
+
+		if (msleep_interruptible(334))
+			return -EINTR;
+	}
+
+	return ret;
+}
+
+static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
+{
+	return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
+}
+
+static struct csr1212_bus_ops nodemgr_csr_ops = {
+	.bus_read =	nodemgr_bus_read,
+	.get_max_rom =	nodemgr_get_max_rom
+};
+
+
+/*
+ * Basically what we do here is start off retrieving the bus_info block.
+ * From there will fill in some info about the node, verify it is of IEEE
+ * 1394 type, and that the crc checks out ok. After that we start off with
+ * the root directory, and subdirectories. To do this, we retrieve the
+ * quadlet header for a directory, find out the length, and retrieve the
+ * complete directory entry (be it a leaf or a directory). We then process
+ * it and add the info to our structure for that particular node.
+ *
+ * We verify CRC's along the way for each directory/block/leaf. The entire
+ * node structure is generic, and simply stores the information in a way
+ * that's easy to parse by the protocol interface.
+ */
+
+/*
+ * The nodemgr relies heavily on the Driver Model for device callbacks and
+ * driver/device mappings. The old nodemgr used to handle all this itself,
+ * but now we are much simpler because of the LDM.
+ */
+
+static DECLARE_MUTEX(nodemgr_serialize);
+
+struct host_info {
+	struct hpsb_host *host;
+	struct list_head list;
+	struct completion exited;
+	struct semaphore reset_sem;
+	int pid;
+	char daemon_name[15];
+	int kill_me;
+};
+
+static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
+static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
+			   char *buffer, int buffer_size);
+static void nodemgr_resume_ne(struct node_entry *ne);
+static void nodemgr_remove_ne(struct node_entry *ne);
+static struct node_entry *find_entry_by_guid(u64 guid);
+
+struct bus_type ieee1394_bus_type = {
+	.name		= "ieee1394",
+	.match		= nodemgr_bus_match,
+};
+
+static void host_cls_release(struct class_device *class_dev)
+{
+	put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
+}
+
+struct class hpsb_host_class = {
+	.name		= "ieee1394_host",
+	.release	= host_cls_release,
+};
+
+static void ne_cls_release(struct class_device *class_dev)
+{
+	put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
+}
+
+static struct class nodemgr_ne_class = {
+	.name		= "ieee1394_node",
+	.release	= ne_cls_release,
+};
+
+static void ud_cls_release(struct class_device *class_dev)
+{
+	put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
+}
+
+/* The name here is only so that unit directory hotplug works with old
+ * style hotplug, which only ever did unit directories anyway. */
+static struct class nodemgr_ud_class = {
+	.name		= "ieee1394",
+	.release	= ud_cls_release,
+	.hotplug	= nodemgr_hotplug,
+};
+
+static struct hpsb_highlevel nodemgr_highlevel;
+
+
+static void nodemgr_release_ud(struct device *dev)
+{
+	struct unit_directory *ud = container_of(dev, struct unit_directory, device);
+
+	if (ud->vendor_name_kv)
+		csr1212_release_keyval(ud->vendor_name_kv);
+	if (ud->model_name_kv)
+		csr1212_release_keyval(ud->model_name_kv);
+
+	kfree(ud);
+}
+
+static void nodemgr_release_ne(struct device *dev)
+{
+	struct node_entry *ne = container_of(dev, struct node_entry, device);
+
+	if (ne->vendor_name_kv)
+		csr1212_release_keyval(ne->vendor_name_kv);
+
+	kfree(ne);
+}
+
+
+static void nodemgr_release_host(struct device *dev)
+{
+	struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
+
+	csr1212_destroy_csr(host->csr.rom);
+
+	kfree(host);
+}
+
+static int nodemgr_ud_platform_data;
+
+static struct device nodemgr_dev_template_ud = {
+	.bus		= &ieee1394_bus_type,
+	.release	= nodemgr_release_ud,
+	.platform_data	= &nodemgr_ud_platform_data,
+};
+
+static struct device nodemgr_dev_template_ne = {
+	.bus		= &ieee1394_bus_type,
+	.release	= nodemgr_release_ne,
+};
+
+struct device nodemgr_dev_template_host = {
+	.bus		= &ieee1394_bus_type,
+	.release	= nodemgr_release_host,
+};
+
+
+#define fw_attr(class, class_type, field, type, format_string)		\
+static ssize_t fw_show_##class##_##field (struct device *dev, char *buf)\
+{									\
+	class_type *class;						\
+	class = container_of(dev, class_type, device);			\
+	return sprintf(buf, format_string, (type)class->field);		\
+}									\
+static struct device_attribute dev_attr_##class##_##field = {		\
+	.attr = {.name = __stringify(field), .mode = S_IRUGO },		\
+	.show   = fw_show_##class##_##field,				\
+};
+
+#define fw_attr_td(class, class_type, td_kv)				\
+static ssize_t fw_show_##class##_##td_kv (struct device *dev, char *buf)\
+{									\
+	int len;							\
+	class_type *class = container_of(dev, class_type, device);	\
+	len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t);	\
+	memcpy(buf,							\
+	       CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv),	\
+	       len);							\
+	while ((buf + len - 1) == '\0')					\
+		len--;							\
+	buf[len++] = '\n';						\
+	buf[len] = '\0';						\
+	return len;							\
+}									\
+static struct device_attribute dev_attr_##class##_##td_kv = {		\
+	.attr = {.name = __stringify(td_kv), .mode = S_IRUGO },		\
+	.show   = fw_show_##class##_##td_kv,				\
+};
+
+
+#define fw_drv_attr(field, type, format_string)			\
+static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
+{								\
+	struct hpsb_protocol_driver *driver;			\
+	driver = container_of(drv, struct hpsb_protocol_driver, driver); \
+	return sprintf(buf, format_string, (type)driver->field);\
+}								\
+static struct driver_attribute driver_attr_drv_##field = {	\
+        .attr = {.name = __stringify(field), .mode = S_IRUGO },	\
+        .show   = fw_drv_show_##field,				\
+};
+
+
+static ssize_t fw_show_ne_bus_options(struct device *dev, char *buf)
+{
+	struct node_entry *ne = container_of(dev, struct node_entry, device);
+
+	return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
+		       "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
+		       ne->busopt.irmc,
+		       ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
+		       ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
+		       ne->busopt.max_rec,
+		       ne->busopt.max_rom,
+		       ne->busopt.cyc_clk_acc);
+}
+static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
+
+
+static ssize_t fw_show_ne_tlabels_free(struct device *dev, char *buf)
+{
+	struct node_entry *ne = container_of(dev, struct node_entry, device);
+	return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1);
+}
+static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
+
+
+static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, char *buf)
+{
+	struct node_entry *ne = container_of(dev, struct node_entry, device);
+	return sprintf(buf, "%u\n", ne->tpool->allocations);
+}
+static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
+
+
+static ssize_t fw_show_ne_tlabels_mask(struct device *dev, char *buf)
+{
+	struct node_entry *ne = container_of(dev, struct node_entry, device);
+#if (BITS_PER_LONG <= 32)
+	return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
+#else
+	return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
+#endif
+}
+static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
+
+
+static ssize_t fw_set_ignore_driver(struct device *dev, const char *buf, size_t count)
+{
+	struct unit_directory *ud = container_of(dev, struct unit_directory, device);
+	int state = simple_strtoul(buf, NULL, 10);
+
+	if (state == 1) {
+		down_write(&dev->bus->subsys.rwsem);
+		device_release_driver(dev);
+		ud->ignore_driver = 1;
+		up_write(&dev->bus->subsys.rwsem);
+	} else if (!state)
+		ud->ignore_driver = 0;
+
+	return count;
+}
+static ssize_t fw_get_ignore_driver(struct device *dev, char *buf)
+{
+	struct unit_directory *ud = container_of(dev, struct unit_directory, device);
+
+	return sprintf(buf, "%d\n", ud->ignore_driver);
+}
+static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
+
+
+static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
+{
+	struct node_entry *ne;
+	u64 guid = (u64)simple_strtoull(buf, NULL, 16);
+
+	ne = find_entry_by_guid(guid);
+
+	if (ne == NULL || !ne->in_limbo)
+		return -EINVAL;
+
+	nodemgr_remove_ne(ne);
+
+	return count;
+}
+static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
+{
+	return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
+}
+static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
+
+static int nodemgr_rescan_bus_thread(void *__unused)
+{
+	/* No userlevel access needed */
+	daemonize("kfwrescan");
+
+	bus_rescan_devices(&ieee1394_bus_type);
+
+	return 0;
+}
+
+static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
+{
+	int state = simple_strtoul(buf, NULL, 10);
+
+	/* Don't wait for this, or care about errors. Root could do
+	 * something stupid and spawn this a lot of times, but that's
+	 * root's fault. */
+	if (state == 1)
+		kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
+
+	return count;
+}
+static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
+{
+	return sprintf(buf, "You can force a rescan of the bus for "
+			"drivers by writing a 1 to this file\n");
+}
+static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
+
+
+static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
+{
+	int state = simple_strtoul(buf, NULL, 10);
+
+	if (state == 1)
+		ignore_drivers = 1;
+	else if (!state)
+		ignore_drivers = 0;
+
+	return count;
+}
+static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
+{
+	return sprintf(buf, "%d\n", ignore_drivers);
+}
+static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
+
+
+struct bus_attribute *const fw_bus_attrs[] = {
+	&bus_attr_destroy_node,
+	&bus_attr_rescan,
+	&bus_attr_ignore_drivers,
+	NULL
+};
+
+
+fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
+fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
+
+fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
+fw_attr_td(ne, struct node_entry, vendor_name_kv)
+fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
+
+fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
+fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
+fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
+fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
+
+static struct device_attribute *const fw_ne_attrs[] = {
+	&dev_attr_ne_guid,
+	&dev_attr_ne_guid_vendor_id,
+	&dev_attr_ne_capabilities,
+	&dev_attr_ne_vendor_id,
+	&dev_attr_ne_nodeid,
+	&dev_attr_bus_options,
+	&dev_attr_tlabels_free,
+	&dev_attr_tlabels_allocations,
+	&dev_attr_tlabels_mask,
+};
+
+
+
+fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
+fw_attr(ud, struct unit_directory, length, int, "%d\n")
+/* These are all dependent on the value being provided */
+fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
+fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
+fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
+fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
+fw_attr_td(ud, struct unit_directory, vendor_name_kv)
+fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
+fw_attr_td(ud, struct unit_directory, model_name_kv)
+
+static struct device_attribute *const fw_ud_attrs[] = {
+	&dev_attr_ud_address,
+	&dev_attr_ud_length,
+	&dev_attr_ignore_driver,
+};
+
+
+fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
+fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
+fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
+fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
+fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
+fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
+fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
+fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
+
+static struct device_attribute *const fw_host_attrs[] = {
+	&dev_attr_host_node_count,
+	&dev_attr_host_selfid_count,
+	&dev_attr_host_nodes_active,
+	&dev_attr_host_in_bus_reset,
+	&dev_attr_host_is_root,
+	&dev_attr_host_is_cycmst,
+	&dev_attr_host_is_irm,
+	&dev_attr_host_is_busmgr,
+};
+
+
+static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
+{
+	struct hpsb_protocol_driver *driver;
+	struct ieee1394_device_id *id;
+	int length = 0;
+	char *scratch = buf;
+
+        driver = container_of(drv, struct hpsb_protocol_driver, driver);
+
+	for (id = driver->id_table; id->match_flags != 0; id++) {
+		int need_coma = 0;
+
+		if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
+			length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
+			scratch = buf + length;
+			need_coma++;
+		}
+
+		if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
+			length += sprintf(scratch, "%smodel_id=0x%06x",
+					  need_coma++ ? "," : "",
+					  id->model_id);
+			scratch = buf + length;
+		}
+
+		if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
+			length += sprintf(scratch, "%sspecifier_id=0x%06x",
+					  need_coma++ ? "," : "",
+					  id->specifier_id);
+			scratch = buf + length;
+		}
+
+		if (id->match_flags & IEEE1394_MATCH_VERSION) {
+			length += sprintf(scratch, "%sversion=0x%06x",
+					  need_coma++ ? "," : "",
+					  id->version);
+			scratch = buf + length;
+		}
+
+		if (need_coma) {
+			*scratch++ = '\n';
+			length++;
+		}
+	}
+
+	return length;
+}
+static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
+
+
+fw_drv_attr(name, const char *, "%s\n")
+
+static struct driver_attribute *const fw_drv_attrs[] = {
+	&driver_attr_drv_name,
+	&driver_attr_device_ids,
+};
+
+
+static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
+{
+	struct device_driver *drv = &driver->driver;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
+		driver_create_file(drv, fw_drv_attrs[i]);
+}
+
+
+static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
+{
+	struct device_driver *drv = &driver->driver;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
+		driver_remove_file(drv, fw_drv_attrs[i]);
+}
+
+
+static void nodemgr_create_ne_dev_files(struct node_entry *ne)
+{
+	struct device *dev = &ne->device;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
+		device_create_file(dev, fw_ne_attrs[i]);
+}
+
+
+static void nodemgr_create_host_dev_files(struct hpsb_host *host)
+{
+	struct device *dev = &host->device;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
+		device_create_file(dev, fw_host_attrs[i]);
+}
+
+
+static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
+
+static void nodemgr_update_host_dev_links(struct hpsb_host *host)
+{
+	struct device *dev = &host->device;
+	struct node_entry *ne;
+
+	sysfs_remove_link(&dev->kobj, "irm_id");
+	sysfs_remove_link(&dev->kobj, "busmgr_id");
+	sysfs_remove_link(&dev->kobj, "host_id");
+
+	if ((ne = find_entry_by_nodeid(host, host->irm_id)))
+		sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
+	if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
+		sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
+	if ((ne = find_entry_by_nodeid(host, host->node_id)))
+		sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
+}
+
+static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
+{
+	struct device *dev = &ud->device;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
+		device_create_file(dev, fw_ud_attrs[i]);
+
+	if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
+		device_create_file(dev, &dev_attr_ud_specifier_id);
+
+	if (ud->flags & UNIT_DIRECTORY_VERSION)
+		device_create_file(dev, &dev_attr_ud_version);
+
+	if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
+		device_create_file(dev, &dev_attr_ud_vendor_id);
+		if (ud->vendor_name_kv)
+			device_create_file(dev, &dev_attr_ud_vendor_name_kv);
+	}
+
+	if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
+		device_create_file(dev, &dev_attr_ud_model_id);
+		if (ud->model_name_kv)
+			device_create_file(dev, &dev_attr_ud_model_name_kv);
+	}
+}
+
+
+static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
+{
+        struct hpsb_protocol_driver *driver;
+        struct unit_directory *ud;
+	struct ieee1394_device_id *id;
+
+	/* We only match unit directories */
+	if (dev->platform_data != &nodemgr_ud_platform_data)
+		return 0;
+
+	ud = container_of(dev, struct unit_directory, device);
+	driver = container_of(drv, struct hpsb_protocol_driver, driver);
+
+	if (ud->ne->in_limbo || ud->ignore_driver)
+		return 0;
+
+        for (id = driver->id_table; id->match_flags != 0; id++) {
+                if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
+                    id->vendor_id != ud->vendor_id)
+                        continue;
+
+                if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
+                    id->model_id != ud->model_id)
+                        continue;
+
+                if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
+                    id->specifier_id != ud->specifier_id)
+                        continue;
+
+                if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
+                    id->version != ud->version)
+                        continue;
+
+		return 1;
+        }
+
+	return 0;
+}
+
+
+static void nodemgr_remove_uds(struct node_entry *ne)
+{
+	struct class_device *cdev, *next;
+	struct unit_directory *ud;
+
+	list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
+		ud = container_of(cdev, struct unit_directory, class_dev);
+
+		if (ud->ne != ne)
+			continue;
+
+		class_device_unregister(&ud->class_dev);
+		device_unregister(&ud->device);
+	}
+}
+
+
+static void nodemgr_remove_ne(struct node_entry *ne)
+{
+	struct device *dev = &ne->device;
+
+	dev = get_device(&ne->device);
+	if (!dev)
+		return;
+
+	HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
+		   NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
+
+	nodemgr_remove_uds(ne);
+
+	class_device_unregister(&ne->class_dev);
+	device_unregister(dev);
+
+	put_device(dev);
+}
+
+
+static void nodemgr_remove_host_dev(struct device *dev)
+{
+	struct device *ne_dev, *next;
+
+	list_for_each_entry_safe(ne_dev, next, &dev->children, node)
+		nodemgr_remove_ne(container_of(ne_dev, struct node_entry, device));
+
+	sysfs_remove_link(&dev->kobj, "irm_id");
+	sysfs_remove_link(&dev->kobj, "busmgr_id");
+	sysfs_remove_link(&dev->kobj, "host_id");
+}
+
+
+static void nodemgr_update_bus_options(struct node_entry *ne)
+{
+#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
+	static const u16 mr[] = { 4, 64, 1024, 0};
+#endif
+	quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
+
+	ne->busopt.irmc         = (busoptions >> 31) & 1;
+	ne->busopt.cmc          = (busoptions >> 30) & 1;
+	ne->busopt.isc          = (busoptions >> 29) & 1;
+	ne->busopt.bmc          = (busoptions >> 28) & 1;
+	ne->busopt.pmc          = (busoptions >> 27) & 1;
+	ne->busopt.cyc_clk_acc  = (busoptions >> 16) & 0xff;
+	ne->busopt.max_rec      = 1 << (((busoptions >> 12) & 0xf) + 1);
+	ne->busopt.max_rom	= (busoptions >> 8) & 0x3;
+	ne->busopt.generation   = (busoptions >> 4) & 0xf;
+	ne->busopt.lnkspd       = busoptions & 0x7;
+
+	HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
+		     "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
+		     busoptions, ne->busopt.irmc, ne->busopt.cmc,
+		     ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
+		     ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
+		     mr[ne->busopt.max_rom],
+		     ne->busopt.generation, ne->busopt.lnkspd);
+}
+
+
+static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
+					      struct host_info *hi, nodeid_t nodeid,
+					      unsigned int generation)
+{
+	struct hpsb_host *host = hi->host;
+        struct node_entry *ne;
+
+	ne = kmalloc(sizeof(struct node_entry), GFP_KERNEL);
+        if (!ne) return NULL;
+
+	memset(ne, 0, sizeof(struct node_entry));
+
+	ne->tpool = &host->tpool[nodeid & NODE_MASK];
+
+        ne->host = host;
+        ne->nodeid = nodeid;
+	ne->generation = generation;
+	ne->needs_probe = 1;
+
+        ne->guid = guid;
+	ne->guid_vendor_id = (guid >> 40) & 0xffffff;
+	ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
+	ne->csr = csr;
+
+	memcpy(&ne->device, &nodemgr_dev_template_ne,
+	       sizeof(ne->device));
+	ne->device.parent = &host->device;
+	snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
+		 (unsigned long long)(ne->guid));
+
+	ne->class_dev.dev = &ne->device;
+	ne->class_dev.class = &nodemgr_ne_class;
+	snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
+		 (unsigned long long)(ne->guid));
+
+	device_register(&ne->device);
+	class_device_register(&ne->class_dev);
+	get_device(&ne->device);
+
+	if (ne->guid_vendor_oui)
+		device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
+	nodemgr_create_ne_dev_files(ne);
+
+	nodemgr_update_bus_options(ne);
+
+	HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
+		   (host->node_id == nodeid) ? "Host" : "Node",
+		   NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
+
+        return ne;
+}
+
+
+static struct node_entry *find_entry_by_guid(u64 guid)
+{
+	struct class *class = &nodemgr_ne_class;
+	struct class_device *cdev;
+	struct node_entry *ne, *ret_ne = NULL;
+
+	down_read(&class->subsys.rwsem);
+	list_for_each_entry(cdev, &class->children, node) {
+		ne = container_of(cdev, struct node_entry, class_dev);
+
+		if (ne->guid == guid) {
+			ret_ne = ne;
+			break;
+		}
+	}
+	up_read(&class->subsys.rwsem);
+
+        return ret_ne;
+}
+
+
+static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
+{
+	struct class *class = &nodemgr_ne_class;
+	struct class_device *cdev;
+	struct node_entry *ne, *ret_ne = NULL;
+
+	down_read(&class->subsys.rwsem);
+	list_for_each_entry(cdev, &class->children, node) {
+		ne = container_of(cdev, struct node_entry, class_dev);
+
+		if (ne->host == host && ne->nodeid == nodeid) {
+			ret_ne = ne;
+			break;
+		}
+	}
+	up_read(&class->subsys.rwsem);
+
+	return ret_ne;
+}
+
+
+static void nodemgr_register_device(struct node_entry *ne, 
+	struct unit_directory *ud, struct device *parent)
+{
+	memcpy(&ud->device, &nodemgr_dev_template_ud,
+	       sizeof(ud->device));
+
+	ud->device.parent = parent;
+
+	snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
+		 ne->device.bus_id, ud->id);
+
+	ud->class_dev.dev = &ud->device;
+	ud->class_dev.class = &nodemgr_ud_class;
+	snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
+		 ne->device.bus_id, ud->id);
+
+	device_register(&ud->device);
+	class_device_register(&ud->class_dev);
+	get_device(&ud->device);
+
+	if (ud->vendor_oui)
+		device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
+	nodemgr_create_ud_dev_files(ud);
+}	
+
+
+/* This implementation currently only scans the config rom and its
+ * immediate unit directories looking for software_id and
+ * software_version entries, in order to get driver autoloading working. */
+static struct unit_directory *nodemgr_process_unit_directory
+	(struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
+	 unsigned int *id, struct unit_directory *parent)
+{
+	struct unit_directory *ud;
+	struct unit_directory *ud_child = NULL;
+	struct csr1212_dentry *dentry;
+	struct csr1212_keyval *kv;
+	u8 last_key_id = 0;
+
+	ud = kmalloc(sizeof(struct unit_directory), GFP_KERNEL);
+	if (!ud)
+		goto unit_directory_error;
+
+	memset (ud, 0, sizeof(struct unit_directory));
+
+	ud->ne = ne;
+	ud->ignore_driver = ignore_drivers;
+	ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
+	ud->ud_kv = ud_kv;
+	ud->id = (*id)++;
+
+	csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
+		switch (kv->key.id) {
+		case CSR1212_KV_ID_VENDOR:
+			if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
+				ud->vendor_id = kv->value.immediate;
+				ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
+
+				if (ud->vendor_id)
+					ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
+			}
+			break;
+
+		case CSR1212_KV_ID_MODEL:
+			ud->model_id = kv->value.immediate;
+			ud->flags |= UNIT_DIRECTORY_MODEL_ID;
+			break;
+
+		case CSR1212_KV_ID_SPECIFIER_ID:
+			ud->specifier_id = kv->value.immediate;
+			ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
+			break;
+
+		case CSR1212_KV_ID_VERSION:
+			ud->version = kv->value.immediate;
+			ud->flags |= UNIT_DIRECTORY_VERSION;
+			break;
+
+		case CSR1212_KV_ID_DESCRIPTOR:
+			if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
+			    CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
+			    CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
+			    CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
+			    CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
+			    CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
+				switch (last_key_id) {
+				case CSR1212_KV_ID_VENDOR:
+					ud->vendor_name_kv = kv;
+					csr1212_keep_keyval(kv);
+					break;
+
+				case CSR1212_KV_ID_MODEL:
+					ud->model_name_kv = kv;
+					csr1212_keep_keyval(kv);
+					break;
+
+				}
+			} /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
+			break;
+
+		case CSR1212_KV_ID_DEPENDENT_INFO:
+			/* Logical Unit Number */
+			if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
+				if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
+					ud_child = kmalloc(sizeof(struct unit_directory), GFP_KERNEL);
+					if (!ud_child)
+						goto unit_directory_error;
+					memcpy(ud_child, ud, sizeof(struct unit_directory));
+					nodemgr_register_device(ne, ud_child, &ne->device);
+					ud_child = NULL;
+					
+					ud->id = (*id)++;
+				}
+				ud->lun = kv->value.immediate;
+				ud->flags |= UNIT_DIRECTORY_HAS_LUN;
+
+			/* Logical Unit Directory */
+			} else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
+				/* This should really be done in SBP2 as this is
+				 * doing SBP2 specific parsing.
+				 */
+				
+				/* first register the parent unit */
+				ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
+				if (ud->device.bus != &ieee1394_bus_type)
+					nodemgr_register_device(ne, ud, &ne->device);
+				
+				/* process the child unit */
+				ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
+
+				if (ud_child == NULL)
+					break;
+				
+				/* inherit unspecified values so hotplug picks it up */
+				if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
+				    !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
+				{
+					ud_child->flags |=  UNIT_DIRECTORY_MODEL_ID;
+					ud_child->model_id = ud->model_id;
+				}
+				if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
+				    !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
+				{
+					ud_child->flags |=  UNIT_DIRECTORY_SPECIFIER_ID;
+					ud_child->specifier_id = ud->specifier_id;
+				}
+				if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
+				    !(ud_child->flags & UNIT_DIRECTORY_VERSION))
+				{
+					ud_child->flags |=  UNIT_DIRECTORY_VERSION;
+					ud_child->version = ud->version;
+				}
+				
+				/* register the child unit */
+				ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
+				nodemgr_register_device(ne, ud_child, &ud->device);
+			}
+
+			break;
+
+		default:
+			break;
+		}
+		last_key_id = kv->key.id;
+	}
+	
+	/* do not process child units here and only if not already registered */
+	if (!parent && ud->device.bus != &ieee1394_bus_type)
+		nodemgr_register_device(ne, ud, &ne->device);
+
+	return ud;
+
+unit_directory_error:
+	if (ud != NULL)
+		kfree(ud);
+	return NULL;
+}
+
+
+static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
+{
+	unsigned int ud_id = 0;
+	struct csr1212_dentry *dentry;
+	struct csr1212_keyval *kv;
+	u8 last_key_id = 0;
+
+	ne->needs_probe = 0;
+
+	csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
+		switch (kv->key.id) {
+		case CSR1212_KV_ID_VENDOR:
+			ne->vendor_id = kv->value.immediate;
+
+			if (ne->vendor_id)
+				ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
+			break;
+
+		case CSR1212_KV_ID_NODE_CAPABILITIES:
+			ne->capabilities = kv->value.immediate;
+			break;
+
+		case CSR1212_KV_ID_UNIT:
+			nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
+			break;
+
+		case CSR1212_KV_ID_DESCRIPTOR:
+			if (last_key_id == CSR1212_KV_ID_VENDOR) {
+				if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
+				    CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
+				    CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
+				    CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
+				    CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
+				    CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
+					ne->vendor_name_kv = kv;
+					csr1212_keep_keyval(kv);
+				}
+			}
+			break;
+		}
+		last_key_id = kv->key.id;
+	}
+
+	if (ne->vendor_oui)
+		device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
+	if (ne->vendor_name_kv)
+		device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
+}
+
+#ifdef CONFIG_HOTPLUG
+
+static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
+			   char *buffer, int buffer_size)
+{
+	struct unit_directory *ud;
+	int i = 0;
+	int length = 0;
+
+	if (!cdev)
+		return -ENODEV;
+
+	ud = container_of(cdev, struct unit_directory, class_dev);
+
+	if (ud->ne->in_limbo || ud->ignore_driver)
+		return -ENODEV;
+
+#define PUT_ENVP(fmt,val) 					\
+do {								\
+    	int printed;						\
+	envp[i++] = buffer;					\
+	printed = snprintf(buffer, buffer_size - length,	\
+			   fmt, val);				\
+	if ((buffer_size - (length+printed) <= 0) || (i >= num_envp))	\
+		return -ENOMEM;					\
+	length += printed+1;					\
+	buffer += printed+1;					\
+} while (0)
+
+	PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
+	PUT_ENVP("MODEL_ID=%06x", ud->model_id);
+	PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
+	PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
+	PUT_ENVP("VERSION=%06x", ud->version);
+
+#undef PUT_ENVP
+
+	envp[i] = NULL;
+
+	return 0;
+}
+
+#else
+
+static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
+			   char *buffer, int buffer_size)
+{
+	return -ENODEV;
+}
+
+#endif /* CONFIG_HOTPLUG */
+
+
+int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
+{
+	int ret;
+
+	/* This will cause a probe for devices */
+	ret = driver_register(&driver->driver);
+	if (!ret)
+		nodemgr_create_drv_files(driver);
+
+	return ret;
+}
+
+void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
+{
+	nodemgr_remove_drv_files(driver);
+	/* This will subsequently disconnect all devices that our driver
+	 * is attached to. */
+	driver_unregister(&driver->driver);
+}
+
+
+/*
+ * This function updates nodes that were present on the bus before the
+ * reset and still are after the reset.  The nodeid and the config rom
+ * may have changed, and the drivers managing this device must be
+ * informed that this device just went through a bus reset, to allow
+ * the to take whatever actions required.
+ */
+static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
+				struct host_info *hi, nodeid_t nodeid,
+				unsigned int generation)
+{
+	if (ne->nodeid != nodeid) {
+		HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
+			   NODE_BUS_ARGS(ne->host, ne->nodeid),
+			   NODE_BUS_ARGS(ne->host, nodeid));
+		ne->nodeid = nodeid;
+	}
+
+	if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
+		kfree(ne->csr->private);
+		csr1212_destroy_csr(ne->csr);
+		ne->csr = csr;
+
+		/* If the node's configrom generation has changed, we
+		 * unregister all the unit directories. */
+		nodemgr_remove_uds(ne);
+
+		nodemgr_update_bus_options(ne);
+
+		/* Mark the node as new, so it gets re-probed */
+		ne->needs_probe = 1;
+	} else {
+		/* old cache is valid, so update its generation */
+		struct nodemgr_csr_info *ci = ne->csr->private;
+		ci->generation = generation;
+		/* free the partially filled now unneeded new cache */
+		kfree(csr->private);
+		csr1212_destroy_csr(csr);
+	}
+
+	if (ne->in_limbo)
+		nodemgr_resume_ne(ne);
+
+	/* Mark the node current */
+	ne->generation = generation;
+}
+
+
+
+static void nodemgr_node_scan_one(struct host_info *hi,
+				  nodeid_t nodeid, int generation)
+{
+	struct hpsb_host *host = hi->host;
+	struct node_entry *ne;
+	octlet_t guid;
+	struct csr1212_csr *csr;
+	struct nodemgr_csr_info *ci;
+
+	ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL);
+	if (!ci)
+		return;
+
+	ci->host = host;
+	ci->nodeid = nodeid;
+	ci->generation = generation;
+
+	/* We need to detect when the ConfigROM's generation has changed,
+	 * so we only update the node's info when it needs to be.  */
+
+	csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
+	if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
+		HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
+			 NODE_BUS_ARGS(host, nodeid));
+		if (csr)
+			csr1212_destroy_csr(csr);
+		kfree(ci);
+		return;
+	}
+
+	if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
+		/* This isn't a 1394 device, but we let it slide. There
+		 * was a report of a device with broken firmware which
+		 * reported '2394' instead of '1394', which is obviously a
+		 * mistake. One would hope that a non-1394 device never
+		 * gets connected to Firewire bus. If someone does, we
+		 * shouldn't be held responsible, so we'll allow it with a
+		 * warning.  */
+		HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
+			  NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
+	}
+
+	guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
+	ne = find_entry_by_guid(guid);
+
+	if (ne && ne->host != host && ne->in_limbo) {
+		/* Must have moved this device from one host to another */
+		nodemgr_remove_ne(ne);
+		ne = NULL;
+	}
+
+	if (!ne)
+		nodemgr_create_node(guid, csr, hi, nodeid, generation);
+	else
+		nodemgr_update_node(ne, csr, hi, nodeid, generation);
+
+	return;
+}
+
+
+static void nodemgr_node_scan(struct host_info *hi, int generation)
+{
+        int count;
+        struct hpsb_host *host = hi->host;
+        struct selfid *sid = (struct selfid *)host->topology_map;
+        nodeid_t nodeid = LOCAL_BUS;
+
+        /* Scan each node on the bus */
+        for (count = host->selfid_count; count; count--, sid++) {
+                if (sid->extended)
+                        continue;
+
+                if (!sid->link_active) {
+                        nodeid++;
+                        continue;
+                }
+                nodemgr_node_scan_one(hi, nodeid++, generation);
+        }
+}
+
+
+static void nodemgr_suspend_ne(struct node_entry *ne)
+{
+	struct class_device *cdev;
+	struct unit_directory *ud;
+
+	HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
+		   NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
+
+	ne->in_limbo = 1;
+	device_create_file(&ne->device, &dev_attr_ne_in_limbo);
+
+	down_write(&ne->device.bus->subsys.rwsem);
+	list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
+		ud = container_of(cdev, struct unit_directory, class_dev);
+
+		if (ud->ne != ne)
+			continue;
+
+		if (ud->device.driver &&
+		    (!ud->device.driver->suspend ||
+		      ud->device.driver->suspend(&ud->device, PMSG_SUSPEND, 0)))
+			device_release_driver(&ud->device);
+	}
+	up_write(&ne->device.bus->subsys.rwsem);
+}
+
+
+static void nodemgr_resume_ne(struct node_entry *ne)
+{
+	struct class_device *cdev;
+	struct unit_directory *ud;
+
+	ne->in_limbo = 0;
+	device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
+
+	down_read(&ne->device.bus->subsys.rwsem);
+	list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
+		ud = container_of(cdev, struct unit_directory, class_dev);
+
+		if (ud->ne != ne)
+			continue;
+
+		if (ud->device.driver && ud->device.driver->resume)
+			ud->device.driver->resume(&ud->device, 0);
+	}
+	up_read(&ne->device.bus->subsys.rwsem);
+
+	HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
+		   NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
+}
+
+
+static void nodemgr_update_pdrv(struct node_entry *ne)
+{
+	struct unit_directory *ud;
+	struct hpsb_protocol_driver *pdrv;
+	struct class *class = &nodemgr_ud_class;
+	struct class_device *cdev;
+
+	down_read(&class->subsys.rwsem);
+	list_for_each_entry(cdev, &class->children, node) {
+		ud = container_of(cdev, struct unit_directory, class_dev);
+		if (ud->ne != ne || !ud->device.driver)
+			continue;
+
+		pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
+
+		if (pdrv->update && pdrv->update(ud)) {
+			down_write(&ud->device.bus->subsys.rwsem);
+			device_release_driver(&ud->device);
+			up_write(&ud->device.bus->subsys.rwsem);
+		}
+	}
+	up_read(&class->subsys.rwsem);
+}
+
+
+static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
+{
+	struct device *dev;
+
+	if (ne->host != hi->host || ne->in_limbo)
+		return;
+
+	dev = get_device(&ne->device);
+	if (!dev)
+		return;
+
+	/* If "needs_probe", then this is either a new or changed node we
+	 * rescan totally. If the generation matches for an existing node
+	 * (one that existed prior to the bus reset) we send update calls
+	 * down to the drivers. Otherwise, this is a dead node and we
+	 * suspend it. */
+	if (ne->needs_probe)
+		nodemgr_process_root_directory(hi, ne);
+	else if (ne->generation == generation)
+		nodemgr_update_pdrv(ne);
+	else
+		nodemgr_suspend_ne(ne);
+
+	put_device(dev);
+}
+
+
+static void nodemgr_node_probe(struct host_info *hi, int generation)
+{
+	struct hpsb_host *host = hi->host;
+	struct class *class = &nodemgr_ne_class;
+	struct class_device *cdev;
+
+	/* Do some processing of the nodes we've probed. This pulls them
+	 * into the sysfs layer if needed, and can result in processing of
+	 * unit-directories, or just updating the node and it's
+	 * unit-directories. */
+	down_read(&class->subsys.rwsem);
+	list_for_each_entry(cdev, &class->children, node)
+		nodemgr_probe_ne(hi, container_of(cdev, struct node_entry, class_dev), generation);
+        up_read(&class->subsys.rwsem);
+
+
+	/* If we had a bus reset while we were scanning the bus, it is
+	 * possible that we did not probe all nodes.  In that case, we
+	 * skip the clean up for now, since we could remove nodes that
+	 * were still on the bus.  The bus reset increased hi->reset_sem,
+	 * so there's a bus scan pending which will do the clean up
+	 * eventually.
+	 *
+	 * Now let's tell the bus to rescan our devices. This may seem
+	 * like overhead, but the driver-model core will only scan a
+	 * device for a driver when either the device is added, or when a
+	 * new driver is added. A bus reset is a good reason to rescan
+	 * devices that were there before.  For example, an sbp2 device
+	 * may become available for login, if the host that held it was
+	 * just removed.  */
+
+	if (generation == get_hpsb_generation(host))
+		bus_rescan_devices(&ieee1394_bus_type);
+
+	return;
+}
+
+/* Because we are a 1394a-2000 compliant IRM, we need to inform all the other
+ * nodes of the broadcast channel.  (Really we're only setting the validity
+ * bit). Other IRM responsibilities go in here as well. */
+static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
+{
+	quadlet_t bc;
+
+	/* if irm_id == -1 then there is no IRM on this bus */
+	if (!host->is_irm || host->irm_id == (nodeid_t)-1)
+		return 1;
+
+	host->csr.broadcast_channel |= 0x40000000;  /* set validity bit */
+
+	bc = cpu_to_be32(host->csr.broadcast_channel);
+
+	hpsb_write(host, LOCAL_BUS | ALL_NODES, get_hpsb_generation(host),
+		   (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
+		   &bc, sizeof(quadlet_t));
+
+	/* If there is no bus manager then we should set the root node's
+	 * force_root bit to promote bus stability per the 1394
+	 * spec. (8.4.2.6) */
+	if (host->busmgr_id == 0xffff && host->node_count > 1)
+	{
+		u16 root_node = host->node_count - 1;
+		struct node_entry *ne = find_entry_by_nodeid(host, root_node | LOCAL_BUS);
+
+		if (ne && ne->busopt.cmc)
+			hpsb_send_phy_config(host, root_node, -1);
+		else {
+			HPSB_DEBUG("The root node is not cycle master capable; "
+				   "selecting a new root node and resetting...");
+
+			if (cycles >= 5) {
+				/* Oh screw it! Just leave the bus as it is */
+				HPSB_DEBUG("Stopping reset loop for IRM sanity");
+				return 1;
+			}
+
+			hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
+			hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
+
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+/* We need to ensure that if we are not the IRM, that the IRM node is capable of
+ * everything we can do, otherwise issue a bus reset and try to become the IRM
+ * ourselves. */
+static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
+{
+	quadlet_t bc;
+	int status;
+
+	if (hpsb_disable_irm || host->is_irm)
+		return 1;
+
+	status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
+			   get_hpsb_generation(host),
+			   (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
+			   &bc, sizeof(quadlet_t));
+
+	if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
+		/* The current irm node does not have a valid BROADCAST_CHANNEL
+		 * register and we do, so reset the bus with force_root set */
+		HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
+
+		if (cycles >= 5) {
+			/* Oh screw it! Just leave the bus as it is */
+			HPSB_DEBUG("Stopping reset loop for IRM sanity");
+			return 1;
+		}
+
+		hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
+		hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
+
+		return 0;
+	}
+
+	return 1;
+}
+
+static int nodemgr_host_thread(void *__hi)
+{
+	struct host_info *hi = (struct host_info *)__hi;
+	struct hpsb_host *host = hi->host;
+	int reset_cycles = 0;
+
+	/* No userlevel access needed */
+	daemonize(hi->daemon_name);
+
+	/* Setup our device-model entries */
+	nodemgr_create_host_dev_files(host);
+
+	/* Sit and wait for a signal to probe the nodes on the bus. This
+	 * happens when we get a bus reset. */
+	while (1) {
+		unsigned int generation = 0;
+		int i;
+
+		if (down_interruptible(&hi->reset_sem) ||
+		    down_interruptible(&nodemgr_serialize)) {
+			if (try_to_freeze(PF_FREEZE))
+				continue;
+			printk("NodeMgr: received unexpected signal?!\n" );
+			break;
+		}
+
+		if (hi->kill_me) {
+			up(&nodemgr_serialize);
+			break;
+		}
+
+		/* Pause for 1/4 second in 1/16 second intervals,
+		 * to make sure things settle down. */
+		for (i = 0; i < 4 ; i++) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			if (msleep_interruptible(63)) {
+				up(&nodemgr_serialize);
+				goto caught_signal;
+			}
+
+			/* Now get the generation in which the node ID's we collect
+			 * are valid.  During the bus scan we will use this generation
+			 * for the read transactions, so that if another reset occurs
+			 * during the scan the transactions will fail instead of
+			 * returning bogus data. */
+			generation = get_hpsb_generation(host);
+
+			/* If we get a reset before we are done waiting, then
+			 * start the the waiting over again */
+			while (!down_trylock(&hi->reset_sem))
+				i = 0;
+
+			/* Check the kill_me again */
+			if (hi->kill_me) {
+				up(&nodemgr_serialize);
+				goto caught_signal;
+			}
+		}
+
+		if (!nodemgr_check_irm_capability(host, reset_cycles)) {
+			reset_cycles++;
+			up(&nodemgr_serialize);
+			continue;
+		}
+
+		/* Scan our nodes to get the bus options and create node
+		 * entries. This does not do the sysfs stuff, since that
+		 * would trigger hotplug callbacks and such, which is a
+		 * bad idea at this point. */
+		nodemgr_node_scan(hi, generation);
+		if (!nodemgr_do_irm_duties(host, reset_cycles)) {
+			reset_cycles++;
+			up(&nodemgr_serialize);
+			continue;
+		}
+
+		reset_cycles = 0;
+
+		/* This actually does the full probe, with sysfs
+		 * registration. */
+		nodemgr_node_probe(hi, generation);
+
+		/* Update some of our sysfs symlinks */
+		nodemgr_update_host_dev_links(host);
+
+		up(&nodemgr_serialize);
+	}
+
+caught_signal:
+	HPSB_VERBOSE("NodeMgr: Exiting thread");
+
+	complete_and_exit(&hi->exited, 0);
+}
+
+int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
+{
+	struct class *class = &hpsb_host_class;
+	struct class_device *cdev;
+	struct hpsb_host *host;
+	int error = 0;
+
+	down_read(&class->subsys.rwsem);
+	list_for_each_entry(cdev, &class->children, node) {
+		host = container_of(cdev, struct hpsb_host, class_dev);
+
+		if ((error = cb(host, __data)))
+			break;
+	}
+	up_read(&class->subsys.rwsem);
+
+	return error;
+}
+
+/* The following four convenience functions use a struct node_entry
+ * for addressing a node on the bus.  They are intended for use by any
+ * process context, not just the nodemgr thread, so we need to be a
+ * little careful when reading out the node ID and generation.  The
+ * thing that can go wrong is that we get the node ID, then a bus
+ * reset occurs, and then we read the generation.  The node ID is
+ * possibly invalid, but the generation is current, and we end up
+ * sending a packet to a the wrong node.
+ *
+ * The solution is to make sure we read the generation first, so that
+ * if a reset occurs in the process, we end up with a stale generation
+ * and the transactions will fail instead of silently using wrong node
+ * ID's.
+ */
+
+void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
+{
+        pkt->host = ne->host;
+        pkt->generation = ne->generation;
+	barrier();
+        pkt->node_id = ne->nodeid;
+}
+
+int hpsb_node_write(struct node_entry *ne, u64 addr,
+		    quadlet_t *buffer, size_t length)
+{
+	unsigned int generation = ne->generation;
+
+	barrier();
+	return hpsb_write(ne->host, ne->nodeid, generation,
+			  addr, buffer, length);
+}
+
+static void nodemgr_add_host(struct hpsb_host *host)
+{
+	struct host_info *hi;
+
+	hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
+
+	if (!hi) {
+		HPSB_ERR ("NodeMgr: out of memory in add host");
+		return;
+	}
+
+	hi->host = host;
+	init_completion(&hi->exited);
+        sema_init(&hi->reset_sem, 0);
+
+	sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
+
+	hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
+
+	if (hi->pid < 0) {
+		HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
+			  hi->daemon_name, host->driver->name);
+		hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
+		return;
+	}
+
+	return;
+}
+
+static void nodemgr_host_reset(struct hpsb_host *host)
+{
+	struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
+
+	if (hi != NULL) {
+		HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
+		up(&hi->reset_sem);
+	} else
+		HPSB_ERR ("NodeMgr: could not process reset of unused host");
+
+	return;
+}
+
+static void nodemgr_remove_host(struct hpsb_host *host)
+{
+	struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
+
+	if (hi) {
+		if (hi->pid >= 0) {
+			hi->kill_me = 1;
+			mb();
+			up(&hi->reset_sem);
+			wait_for_completion(&hi->exited);
+			nodemgr_remove_host_dev(&host->device);
+		}
+	} else
+		HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
+			 host->driver->name);
+
+	return;
+}
+
+static struct hpsb_highlevel nodemgr_highlevel = {
+	.name =		"Node manager",
+	.add_host =	nodemgr_add_host,
+	.host_reset =	nodemgr_host_reset,
+	.remove_host =	nodemgr_remove_host,
+};
+
+int init_ieee1394_nodemgr(void)
+{
+	int ret;
+
+	ret = class_register(&nodemgr_ne_class);
+	if (ret < 0)
+		return ret;
+
+	ret = class_register(&nodemgr_ud_class);
+	if (ret < 0) {
+		class_unregister(&nodemgr_ne_class);
+		return ret;
+	}
+
+	hpsb_register_highlevel(&nodemgr_highlevel);
+
+	return 0;
+}
+
+void cleanup_ieee1394_nodemgr(void)
+{
+        hpsb_unregister_highlevel(&nodemgr_highlevel);
+
+	class_unregister(&nodemgr_ud_class);
+	class_unregister(&nodemgr_ne_class);
+}