#include <linux/bitmap.h>
#include <linux/kernel.h>
+#include <linux/kmemcheck.h>
#include <linux/list.h>
#include <linux/slab.h>
-#include <linux/completion.h>
#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/mutex.h>
+#include <linux/freezer.h>
+#include <linux/semaphore.h>
#include <asm/atomic.h>
#include "csr.h"
#include "nodemgr.h"
static int ignore_drivers;
-module_param(ignore_drivers, int, 0444);
+module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
struct nodemgr_csr_info {
struct hpsb_host *host;
nodeid_t nodeid;
unsigned int generation;
+
+ kmemcheck_bitfield_begin(flags);
unsigned int speed_unverified:1;
+ kmemcheck_bitfield_end(flags);
};
-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;
-}
-
/*
* Correct the speed map entry. This is necessary
* - for nodes with link speed < phy speed,
{
quadlet_t q;
u8 i, *speed, old_speed, good_speed;
- int ret;
+ int error;
speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
old_speed = *speed;
* just finished its initialization. */
for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
*speed = i;
- ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
- &q, sizeof(quadlet_t));
- if (ret)
+ error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
+ &q, 4);
+ if (error)
break;
*buffer = q;
good_speed = i;
return 0;
}
*speed = old_speed;
- return ret;
+ return error;
}
-static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
- void *buffer, void *__ci)
+static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr,
+ void *buffer, void *__ci)
{
struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
- int i, ret;
+ int i, error;
for (i = 1; ; i++) {
- ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
- buffer, length);
- if (!ret) {
+ error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
+ buffer, 4);
+ if (!error) {
ci->speed_unverified = 0;
break;
}
/* The ieee1394_core guessed the node's speed capability from
* the self ID. Check whether a lower speed works. */
- if (ci->speed_unverified && length == sizeof(quadlet_t)) {
- ret = nodemgr_check_speed(ci, addr, buffer);
- if (!ret)
+ if (ci->speed_unverified) {
+ error = nodemgr_check_speed(ci, addr, buffer);
+ if (!error)
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;
+ return error;
}
static struct csr1212_bus_ops nodemgr_csr_ops = {
.bus_read = nodemgr_bus_read,
- .get_max_rom = nodemgr_get_max_rom
};
* 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;
+ struct task_struct *thread;
};
static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
-static int nodemgr_uevent(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);
+static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
struct bus_type ieee1394_bus_type = {
.name = "ieee1394",
.match = nodemgr_bus_match,
};
-static void host_cls_release(struct class_device *class_dev)
+static void host_cls_release(struct device *dev)
{
- put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
+ put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
}
struct class hpsb_host_class = {
.name = "ieee1394_host",
- .release = host_cls_release,
+ .dev_release = host_cls_release,
};
-static void ne_cls_release(struct class_device *class_dev)
+static void ne_cls_release(struct device *dev)
{
- put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
+ put_device(&container_of((dev), struct node_entry, node_dev)->device);
}
static struct class nodemgr_ne_class = {
.name = "ieee1394_node",
- .release = ne_cls_release,
+ .dev_release = ne_cls_release,
};
-static void ud_cls_release(struct class_device *class_dev)
+static void ud_cls_release(struct device *dev)
{
- put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
+ put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
}
/* The name here is only so that unit directory hotplug works with old
- * style hotplug, which only ever did unit directories anyway. */
+ * style hotplug, which only ever did unit directories anyway.
+ */
static struct class nodemgr_ud_class = {
.name = "ieee1394",
- .release = ud_cls_release,
- .uevent = nodemgr_uevent,
+ .dev_release = ud_cls_release,
+ .dev_uevent = nodemgr_uevent,
};
static struct hpsb_highlevel nodemgr_highlevel;
.release = nodemgr_release_ne,
};
+/* This dummy driver prevents the host devices from being scanned. We have no
+ * useful drivers for them yet, and there would be a deadlock possible if the
+ * driver core scans the host device while the host's low-level driver (i.e.
+ * the host's parent device) is being removed. */
+static struct device_driver nodemgr_mid_layer_driver = {
+ .bus = &ieee1394_bus_type,
+ .name = "nodemgr",
+ .owner = THIS_MODULE,
+};
+
struct device nodemgr_dev_template_host = {
.bus = &ieee1394_bus_type,
.release = nodemgr_release_host,
memcpy(buf, \
CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
len); \
- while ((buf + len - 1) == '\0') \
+ while (buf[len - 1] == '\0') \
len--; \
buf[len++] = '\n'; \
buf[len] = '\0'; \
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, \
+ .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
+ .show = fw_drv_show_##field, \
};
static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
-/* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically
- * here, therefore displayed values may be occasionally wrong. */
-static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
+#ifdef HPSB_DEBUG_TLABELS
+static ssize_t fw_show_ne_tlabels_free(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct node_entry *ne = container_of(dev, struct node_entry, device);
- return sprintf(buf, "%d\n", 64 - bitmap_weight(ne->tpool->pool, 64));
-}
-static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
+ unsigned long flags;
+ unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
+ int tf;
+ spin_lock_irqsave(&hpsb_tlabel_lock, flags);
+ tf = 64 - bitmap_weight(tp, 64);
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
-static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct node_entry *ne = container_of(dev, struct node_entry, device);
- return sprintf(buf, "%u\n", ne->tpool->allocations);
+ return sprintf(buf, "%d\n", tf);
}
-static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
+static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
-static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct node_entry *ne = container_of(dev, struct node_entry, device);
+ unsigned long flags;
+ unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
+ u64 tm;
+
+ spin_lock_irqsave(&hpsb_tlabel_lock, flags);
#if (BITS_PER_LONG <= 32)
- return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
+ tm = ((u64)tp[0] << 32) + tp[1];
#else
- return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
+ tm = tp[0];
#endif
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
+
+ return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
}
static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
+#endif /* HPSB_DEBUG_TLABELS */
static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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)
+ device_release_driver(dev);
+ } else if (state == 0)
ud->ignore_driver = 0;
return count;
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)
+static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
+ size_t count)
{
- 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);
-
+ int error = 0;
-static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
-{
if (simple_strtoul(buf, NULL, 10) == 1)
- bus_rescan_devices(&ieee1394_bus_type);
- return count;
+ error = bus_rescan_devices(&ieee1394_bus_type);
+ return error ? error : count;
}
static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
{
if (state == 1)
ignore_drivers = 1;
- else if (!state)
+ else if (state == 0)
ignore_drivers = 0;
return count;
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, 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_vendor_id,
&dev_attr_ne_nodeid,
&dev_attr_bus_options,
+#ifdef HPSB_DEBUG_TLABELS
&dev_attr_tlabels_free,
- &dev_attr_tlabels_allocations,
&dev_attr_tlabels_mask,
+#endif
};
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[] = {
static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
{
struct hpsb_protocol_driver *driver;
- struct ieee1394_device_id *id;
+ const struct ieee1394_device_id *id;
int length = 0;
char *scratch = buf;
- driver = container_of(drv, struct hpsb_protocol_driver, driver);
+ driver = container_of(drv, struct hpsb_protocol_driver, driver);
+ id = driver->id_table;
+ if (!id)
+ return 0;
- for (id = driver->id_table; id->match_flags != 0; id++) {
+ for (; id->match_flags != 0; id++) {
int need_coma = 0;
if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
int i;
for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
- driver_create_file(drv, fw_drv_attrs[i]);
+ if (driver_create_file(drv, fw_drv_attrs[i]))
+ goto fail;
+ return;
+fail:
+ HPSB_ERR("Failed to add sysfs attribute");
}
int i;
for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
- device_create_file(dev, fw_ne_attrs[i]);
+ if (device_create_file(dev, fw_ne_attrs[i]))
+ goto fail;
+ return;
+fail:
+ HPSB_ERR("Failed to add sysfs attribute");
}
int i;
for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
- device_create_file(dev, fw_host_attrs[i]);
+ if (device_create_file(dev, fw_host_attrs[i]))
+ goto fail;
+ return;
+fail:
+ HPSB_ERR("Failed to add sysfs attribute");
}
-static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
+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)
{
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");
+ if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
+ sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
+ goto fail;
+ if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
+ sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
+ goto fail;
+ if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
+ sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
+ goto fail;
+ return;
+fail:
+ HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
}
static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
int i;
for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
- device_create_file(dev, fw_ud_attrs[i]);
-
+ if (device_create_file(dev, fw_ud_attrs[i]))
+ goto fail;
if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
- device_create_file(dev, &dev_attr_ud_specifier_id);
-
+ if (device_create_file(dev, &dev_attr_ud_specifier_id))
+ goto fail;
if (ud->flags & UNIT_DIRECTORY_VERSION)
- device_create_file(dev, &dev_attr_ud_version);
-
+ if (device_create_file(dev, &dev_attr_ud_version))
+ goto fail;
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 (device_create_file(dev, &dev_attr_ud_vendor_id))
+ goto fail;
+ if (ud->vendor_name_kv &&
+ device_create_file(dev, &dev_attr_ud_vendor_name_kv))
+ goto fail;
}
-
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);
+ if (device_create_file(dev, &dev_attr_ud_model_id))
+ goto fail;
+ if (ud->model_name_kv &&
+ device_create_file(dev, &dev_attr_ud_model_name_kv))
+ goto fail;
}
+ return;
+fail:
+ HPSB_ERR("Failed to add sysfs attribute");
}
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;
+ struct hpsb_protocol_driver *driver;
+ struct unit_directory *ud;
+ const 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;
+ /* We only match drivers of type hpsb_protocol_driver */
+ if (drv == &nodemgr_mid_layer_driver)
+ return 0;
+
+ driver = container_of(drv, struct hpsb_protocol_driver, driver);
+ id = driver->id_table;
+ if (!id)
+ return 0;
+
+ for (; 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_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_SPECIFIER_ID) &&
+ id->specifier_id != ud->specifier_id)
+ continue;
- if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
- id->version != ud->version)
- 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)
+static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
+
+static int match_ne(struct device *dev, void *data)
{
- struct class_device *cdev, *next;
struct unit_directory *ud;
+ struct node_entry *ne = data;
- list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
- ud = container_of(cdev, struct unit_directory, class_dev);
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ return ud->ne == ne;
+}
- if (ud->ne != ne)
- continue;
+static void nodemgr_remove_uds(struct node_entry *ne)
+{
+ struct device *dev;
+ struct unit_directory *ud;
- class_device_unregister(&ud->class_dev);
+ /* Use class_find device to iterate the devices. Since this code
+ * may be called from other contexts besides the knodemgrds,
+ * protect it by nodemgr_serialize_remove_uds.
+ */
+ mutex_lock(&nodemgr_serialize_remove_uds);
+ for (;;) {
+ dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
+ if (!dev)
+ break;
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ put_device(dev);
+ device_unregister(&ud->unit_dev);
device_unregister(&ud->device);
}
+ mutex_unlock(&nodemgr_serialize_remove_uds);
}
static void nodemgr_remove_ne(struct node_entry *ne)
{
- struct device *dev = &ne->device;
+ struct device *dev;
dev = get_device(&ne->device);
if (!dev)
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(&ne->node_dev);
device_unregister(dev);
put_device(dev);
}
-static int __nodemgr_remove_host_dev(struct device *dev, void *data)
+static int remove_host_dev(struct device *dev, void *data)
{
- nodemgr_remove_ne(container_of(dev, struct node_entry, device));
+ if (dev->bus == &ieee1394_bus_type)
+ nodemgr_remove_ne(container_of(dev, struct node_entry,
+ device));
return 0;
}
static void nodemgr_remove_host_dev(struct device *dev)
{
- device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
+ device_for_each_child(dev, NULL, remove_host_dev);
sysfs_remove_link(&dev->kobj, "irm_id");
sysfs_remove_link(&dev->kobj, "busmgr_id");
sysfs_remove_link(&dev->kobj, "host_id");
#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.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;
+ 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",
}
-static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
- struct host_info *hi, nodeid_t nodeid,
- unsigned int generation)
+static struct node_entry *nodemgr_create_node(octlet_t guid,
+ struct csr1212_csr *csr, struct hpsb_host *host,
+ nodeid_t nodeid, unsigned int generation)
{
- struct hpsb_host *host = hi->host;
struct node_entry *ne;
ne = kzalloc(sizeof(*ne), GFP_KERNEL);
if (!ne)
- return NULL;
-
- ne->tpool = &host->tpool[nodeid & NODE_MASK];
+ goto fail_alloc;
ne->host = host;
ne->nodeid = nodeid;
ne->generation = generation;
- ne->needs_probe = 1;
+ ne->needs_probe = true;
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));
+ dev_set_name(&ne->device, "%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));
+ ne->node_dev.parent = &ne->device;
+ ne->node_dev.class = &nodemgr_ne_class;
+ dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
- device_register(&ne->device);
- class_device_register(&ne->class_dev);
+ if (device_register(&ne->device))
+ goto fail_devreg;
+ if (device_register(&ne->node_dev))
+ goto fail_classdevreg;
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);
NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
return ne;
+
+fail_classdevreg:
+ device_unregister(&ne->device);
+fail_devreg:
+ kfree(ne);
+fail_alloc:
+ HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
+ NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
+
+ return NULL;
}
+static int match_ne_guid(struct device *dev, void *data)
+{
+ struct node_entry *ne;
+ u64 *guid = data;
+
+ ne = container_of(dev, struct node_entry, node_dev);
+ return ne->guid == *guid;
+}
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);
+ struct device *dev;
+ struct node_entry *ne;
- if (ne->guid == guid) {
- ret_ne = ne;
- break;
- }
- }
- up_read(&class->subsys.rwsem);
+ dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
+ if (!dev)
+ return NULL;
+ ne = container_of(dev, struct node_entry, node_dev);
+ put_device(dev);
- return ret_ne;
+ return ne;
}
+struct match_nodeid_parameter {
+ struct hpsb_host *host;
+ nodeid_t nodeid;
+};
-static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
+static int match_ne_nodeid(struct device *dev, void *data)
{
- struct class *class = &nodemgr_ne_class;
- struct class_device *cdev;
- struct node_entry *ne, *ret_ne = NULL;
+ int found = 0;
+ struct node_entry *ne;
+ struct match_nodeid_parameter *p = data;
- down_read(&class->subsys.rwsem);
- list_for_each_entry(cdev, &class->children, node) {
- ne = container_of(cdev, struct node_entry, class_dev);
+ if (!dev)
+ goto ret;
+ ne = container_of(dev, struct node_entry, node_dev);
+ if (ne->host == p->host && ne->nodeid == p->nodeid)
+ found = 1;
+ret:
+ return found;
+}
- if (ne->host == host && ne->nodeid == nodeid) {
- ret_ne = ne;
- break;
- }
- }
- up_read(&class->subsys.rwsem);
+static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
+ nodeid_t nodeid)
+{
+ struct device *dev;
+ struct node_entry *ne;
+ struct match_nodeid_parameter p;
+
+ p.host = host;
+ p.nodeid = nodeid;
+
+ dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
+ if (!dev)
+ return NULL;
+ ne = container_of(dev, struct node_entry, node_dev);
+ put_device(dev);
- return ret_ne;
+ return ne;
}
ud->device.parent = parent;
- snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
- ne->device.bus_id, ud->id);
+ dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), 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);
+ ud->unit_dev.parent = &ud->device;
+ ud->unit_dev.class = &nodemgr_ud_class;
+ dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
- device_register(&ud->device);
- class_device_register(&ud->class_dev);
+ if (device_register(&ud->device))
+ goto fail_devreg;
+ if (device_register(&ud->unit_dev))
+ goto fail_classdevreg;
get_device(&ud->device);
- if (ud->vendor_oui)
- device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
nodemgr_create_ud_dev_files(ud);
+
+ return;
+
+fail_classdevreg:
+ device_unregister(&ud->device);
+fail_devreg:
+ HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
}
* 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,
+ (struct node_entry *ne, struct csr1212_keyval *ud_kv,
unsigned int *id, struct unit_directory *parent)
{
struct unit_directory *ud;
ud->ne = ne;
ud->ignore_driver = ignore_drivers;
- ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
+ ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
+ ud->directory_id = ud->address & 0xffffff;
ud->ud_kv = ud_kv;
ud->id = (*id)++;
+ /* inherit vendor_id from root directory if none exists in unit dir */
+ ud->vendor_id = ne->vendor_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;
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);
+ ud->vendor_name_kv = kv;
break;
case CSR1212_KV_ID_MODEL:
- ud->model_name_kv = kv;
csr1212_keep_keyval(kv);
+ ud->model_name_kv = kv;
break;
}
/* Logical Unit Number */
if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
- ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
+ ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
if (!ud_child)
goto unit_directory_error;
- memcpy(ud_child, ud, sizeof(*ud_child));
nodemgr_register_device(ne, ud_child, &ne->device);
ud_child = NULL;
nodemgr_register_device(ne, ud, &ne->device);
/* process the child unit */
- ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
+ ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
if (ud_child == NULL)
break;
break;
+ case CSR1212_KV_ID_DIRECTORY_ID:
+ ud->directory_id = kv->value.immediate;
+ break;
+
default:
break;
}
}
-static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
+static void nodemgr_process_root_directory(struct node_entry *ne)
{
unsigned int ud_id = 0;
struct csr1212_dentry *dentry;
- struct csr1212_keyval *kv;
+ struct csr1212_keyval *kv, *vendor_name_kv = NULL;
u8 last_key_id = 0;
- ne->needs_probe = 0;
+ ne->needs_probe = false;
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:
break;
case CSR1212_KV_ID_UNIT:
- nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
+ nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
break;
case CSR1212_KV_ID_DESCRIPTOR:
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);
+ vendor_name_kv = 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);
+ if (ne->vendor_name_kv) {
+ kv = ne->vendor_name_kv;
+ ne->vendor_name_kv = vendor_name_kv;
+ csr1212_release_keyval(kv);
+ } else if (vendor_name_kv) {
+ ne->vendor_name_kv = vendor_name_kv;
+ if (device_create_file(&ne->device,
+ &dev_attr_ne_vendor_name_kv) != 0)
+ HPSB_ERR("Failed to add sysfs attribute");
+ }
}
#ifdef CONFIG_HOTPLUG
-static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct unit_directory *ud;
- int i = 0;
- int length = 0;
+ int retval = 0;
/* ieee1394:venNmoNspNverN */
char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
- if (!cdev)
+ if (!dev)
return -ENODEV;
- ud = container_of(cdev, struct unit_directory, class_dev);
+ ud = container_of(dev, struct unit_directory, unit_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; \
+ retval = add_uevent_var(env, fmt, val); \
+ if (retval) \
+ return retval; \
} while (0)
PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
#undef PUT_ENVP
- envp[i] = NULL;
-
return 0;
}
#else
-static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
{
return -ENODEV;
}
#endif /* CONFIG_HOTPLUG */
-int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
+int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
+ struct module *owner)
{
- int ret;
+ int error;
- /* This will cause a probe for devices */
- ret = driver_register(&driver->driver);
- if (!ret)
- nodemgr_create_drv_files(driver);
+ drv->driver.bus = &ieee1394_bus_type;
+ drv->driver.owner = owner;
+ drv->driver.name = drv->name;
- return ret;
+ /* This will cause a probe for devices */
+ error = driver_register(&drv->driver);
+ if (!error)
+ nodemgr_create_drv_files(drv);
+ return error;
}
void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
* 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)
+ nodeid_t nodeid, unsigned int generation)
{
if (ne->nodeid != nodeid) {
HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
nodemgr_update_bus_options(ne);
/* Mark the node as new, so it gets re-probed */
- ne->needs_probe = 1;
+ ne->needs_probe = true;
} else {
/* old cache is valid, so update its generation */
struct nodemgr_csr_info *ci = ne->csr->private;
csr1212_destroy_csr(csr);
}
- if (ne->in_limbo)
- nodemgr_resume_ne(ne);
-
- /* Mark the node current */
+ /* Finally, mark the node current */
+ smp_wmb();
ne->generation = generation;
-}
+ if (ne->in_limbo) {
+ device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
+ ne->in_limbo = false;
+ HPSB_DEBUG("Node reactivated: "
+ "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
+ NODE_BUS_ARGS(ne->host, ne->nodeid),
+ (unsigned long long)ne->guid);
+ }
+}
-static void nodemgr_node_scan_one(struct host_info *hi,
+static void nodemgr_node_scan_one(struct hpsb_host *host,
nodeid_t nodeid, int generation)
{
- struct hpsb_host *host = hi->host;
struct node_entry *ne;
octlet_t guid;
struct csr1212_csr *csr;
u8 *speed;
ci = kmalloc(sizeof(*ci), GFP_KERNEL);
+ kmemcheck_annotate_bitfield(ci, flags);
if (!ci)
return;
}
if (!ne)
- nodemgr_create_node(guid, csr, hi, nodeid, generation);
+ nodemgr_create_node(guid, csr, host, nodeid, generation);
else
- nodemgr_update_node(ne, csr, hi, nodeid, generation);
+ nodemgr_update_node(ne, csr, nodeid, generation);
}
-static void nodemgr_node_scan(struct host_info *hi, int generation)
+static void nodemgr_node_scan(struct hpsb_host *host, 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);
- }
-}
-
+ int count;
+ struct selfid *sid = (struct selfid *)host->topology_map;
+ nodeid_t nodeid = LOCAL_BUS;
-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)
+ /* Scan each node on the bus */
+ for (count = host->selfid_count; count; count--, sid++) {
+ if (sid->extended)
continue;
- if (ud->device.driver &&
- (!ud->device.driver->suspend ||
- ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
- device_release_driver(&ud->device);
+ if (!sid->link_active) {
+ nodeid++;
+ continue;
+ }
+ nodemgr_node_scan_one(host, nodeid++, generation);
}
- up_write(&ne->device.bus->subsys.rwsem);
}
-
-static void nodemgr_resume_ne(struct node_entry *ne)
+static void nodemgr_pause_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);
+ HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
+ NODE_BUS_ARGS(ne->host, ne->nodeid),
+ (unsigned long long)ne->guid);
- 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);
- }
- 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);
+ ne->in_limbo = true;
+ WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
}
-
-static void nodemgr_update_pdrv(struct node_entry *ne)
+static int update_pdrv(struct device *dev, void *data)
{
struct unit_directory *ud;
+ struct device_driver *drv;
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);
+ struct node_entry *ne = data;
+ int error;
+
+ ud = container_of(dev, struct unit_directory, unit_dev);
+ if (ud->ne == ne) {
+ drv = get_driver(ud->device.driver);
+ if (drv) {
+ error = 0;
+ pdrv = container_of(drv, struct hpsb_protocol_driver,
+ driver);
+ if (pdrv->update) {
+ down(&ud->device.sem);
+ error = pdrv->update(ud);
+ up(&ud->device.sem);
+ }
+ if (error)
+ device_release_driver(&ud->device);
+ put_driver(drv);
}
}
- up_read(&class->subsys.rwsem);
+
+ return 0;
}
+static void nodemgr_update_pdrv(struct node_entry *ne)
+{
+ class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
+}
/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
* seems like an optional service but in the end it is practically mandatory
{
const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
quadlet_t bc_remote, bc_local;
- int ret;
+ int error;
if (!ne->host->is_irm || ne->generation != generation ||
ne->nodeid == ne->host->node_id)
bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
/* Check if the register is implemented and 1394a compliant. */
- ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
- sizeof(bc_remote));
- if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
+ error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
+ sizeof(bc_remote));
+ if (!error && bc_remote & cpu_to_be32(0x80000000) &&
bc_remote != bc_local)
hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
}
-static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
+static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
+ int generation)
{
struct device *dev;
- if (ne->host != hi->host || ne->in_limbo)
+ if (ne->host != host || ne->in_limbo)
return;
dev = get_device(&ne->device);
* down to the drivers. Otherwise, this is a dead node and we
* suspend it. */
if (ne->needs_probe)
- nodemgr_process_root_directory(hi, ne);
+ nodemgr_process_root_directory(ne);
else if (ne->generation == generation)
nodemgr_update_pdrv(ne);
else
- nodemgr_suspend_ne(ne);
+ nodemgr_pause_ne(ne);
put_device(dev);
}
+struct node_probe_parameter {
+ struct hpsb_host *host;
+ int generation;
+ bool probe_now;
+};
-static void nodemgr_node_probe(struct host_info *hi, int generation)
+static int node_probe(struct device *dev, void *data)
{
- struct hpsb_host *host = hi->host;
- struct class *class = &nodemgr_ne_class;
- struct class_device *cdev;
+ struct node_probe_parameter *p = data;
struct node_entry *ne;
- /* Do some processing of the nodes we've probed. This pulls them
+ if (p->generation != get_hpsb_generation(p->host))
+ return -EAGAIN;
+
+ ne = container_of(dev, struct node_entry, node_dev);
+ if (ne->needs_probe == p->probe_now)
+ nodemgr_probe_ne(p->host, ne, p->generation);
+ return 0;
+}
+
+static int nodemgr_node_probe(struct hpsb_host *host, int generation)
+{
+ struct node_probe_parameter p;
+
+ p.host = host;
+ p.generation = generation;
+ /*
+ * 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.
*
* Run updates before probes. Usually, updates are time-critical
- * while probes are time-consuming. (Well, those probes need some
- * improvement...) */
-
- down_read(&class->subsys.rwsem);
- list_for_each_entry(cdev, &class->children, node) {
- ne = container_of(cdev, struct node_entry, class_dev);
- if (!ne->needs_probe)
- nodemgr_probe_ne(hi, ne, generation);
- }
- list_for_each_entry(cdev, &class->children, node) {
- ne = container_of(cdev, struct node_entry, class_dev);
- if (ne->needs_probe)
- nodemgr_probe_ne(hi, ne, 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.
+ * while probes are time-consuming.
*
+ * Meanwhile, another bus reset may have happened. In this case we
+ * skip everything here and let the next bus scan handle it.
+ * Otherwise we may prematurely remove nodes which are still there.
+ */
+ p.probe_now = false;
+ if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
+ return 0;
+
+ p.probe_now = true;
+ if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
+ return 0;
+ /*
* 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. */
+ * just removed.
+ */
+ if (bus_rescan_devices(&ieee1394_bus_type) != 0)
+ HPSB_DEBUG("bus_rescan_devices had an error");
- if (generation == get_hpsb_generation(host))
- bus_rescan_devices(&ieee1394_bus_type);
+ return 1;
+}
- return;
+static int remove_nodes_in_limbo(struct device *dev, void *data)
+{
+ struct node_entry *ne;
+
+ if (dev->bus != &ieee1394_bus_type)
+ return 0;
+
+ ne = container_of(dev, struct node_entry, device);
+ if (ne->in_limbo)
+ nodemgr_remove_ne(ne);
+
+ return 0;
+}
+
+static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
+{
+ device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
}
static int nodemgr_send_resume_packet(struct hpsb_host *host)
{
struct hpsb_packet *packet;
- int ret = 1;
+ int error = -ENOMEM;
packet = hpsb_make_phypacket(host,
EXTPHYPACKET_TYPE_RESUME |
if (packet) {
packet->no_waiter = 1;
packet->generation = get_hpsb_generation(host);
- ret = hpsb_send_packet(packet);
+ error = hpsb_send_packet(packet);
}
- if (ret)
+ if (error)
HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
host->id);
- return ret;
+ return error;
}
/* Perform a few high-level IRM responsibilities. */
return 1;
}
-static int nodemgr_host_thread(void *__hi)
+static int nodemgr_host_thread(void *data)
{
- 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);
+ struct hpsb_host *host = data;
+ unsigned int g, generation = 0;
+ int i, reset_cycles = 0;
+ set_freezable();
/* 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())
- continue;
- printk("NodeMgr: received unexpected signal?!\n" );
- break;
- }
+ for (;;) {
+ /* Sleep until next bus reset */
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (get_hpsb_generation(host) == generation &&
+ !kthread_should_stop())
+ schedule();
+ __set_current_state(TASK_RUNNING);
- if (hi->kill_me) {
- up(&nodemgr_serialize);
- break;
- }
+ /* Thread may have been woken up to freeze or to exit */
+ if (try_to_freeze())
+ continue;
+ if (kthread_should_stop())
+ goto exit;
/* Pause for 1/4 second in 1/16 second intervals,
* to make sure things settle down. */
+ g = get_hpsb_generation(host);
for (i = 0; i < 4 ; i++) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (msleep_interruptible(63)) {
- up(&nodemgr_serialize);
- goto caught_signal;
- }
+ msleep_interruptible(63);
+ try_to_freeze();
+ if (kthread_should_stop())
+ goto exit;
/* Now get the generation in which the node ID's we collect
* are valid. During the bus scan we will use this generation
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;
- }
+ * start the waiting over again */
+ if (generation != g)
+ g = generation, i = 0;
}
if (!nodemgr_check_irm_capability(host, reset_cycles) ||
!nodemgr_do_irm_duties(host, reset_cycles)) {
reset_cycles++;
- up(&nodemgr_serialize);
continue;
}
reset_cycles = 0;
* entries. This does not do the sysfs stuff, since that
* would trigger uevents and such, which is a bad idea at
* this point. */
- nodemgr_node_scan(hi, generation);
+ nodemgr_node_scan(host, generation);
/* This actually does the full probe, with sysfs
* registration. */
- nodemgr_node_probe(hi, generation);
+ if (!nodemgr_node_probe(host, generation))
+ continue;
/* Update some of our sysfs symlinks */
nodemgr_update_host_dev_links(host);
- up(&nodemgr_serialize);
- }
+ /* Sleep 3 seconds */
+ for (i = 3000/200; i; i--) {
+ msleep_interruptible(200);
+ try_to_freeze();
+ if (kthread_should_stop())
+ goto exit;
-caught_signal:
+ if (generation != get_hpsb_generation(host))
+ break;
+ }
+ /* Remove nodes which are gone, unless a bus reset happened */
+ if (!i)
+ nodemgr_remove_nodes_in_limbo(host);
+ }
+exit:
HPSB_VERBOSE("NodeMgr: Exiting thread");
-
- complete_and_exit(&hi->exited, 0);
+ return 0;
}
-int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
+struct per_host_parameter {
+ void *data;
+ int (*cb)(struct hpsb_host *, void *);
+};
+
+static int per_host(struct device *dev, void *data)
{
- struct class *class = &hpsb_host_class;
- struct class_device *cdev;
struct hpsb_host *host;
- int error = 0;
+ struct per_host_parameter *p = data;
- down_read(&class->subsys.rwsem);
- list_for_each_entry(cdev, &class->children, node) {
- host = container_of(cdev, struct hpsb_host, class_dev);
+ host = container_of(dev, struct hpsb_host, host_dev);
+ return p->cb(host, p->data);
+}
- if ((error = cb(host, __data)))
- break;
- }
- up_read(&class->subsys.rwsem);
+/**
+ * nodemgr_for_each_host - call a function for each IEEE 1394 host
+ * @data: an address to supply to the callback
+ * @cb: function to call for each host
+ *
+ * Iterate the hosts, calling a given function with supplied data for each host.
+ * If the callback fails on a host, i.e. if it returns a non-zero value, the
+ * iteration is stopped.
+ *
+ * Return value: 0 on success, non-zero on failure (same as returned by last run
+ * of the callback).
+ */
+int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
+{
+ struct per_host_parameter p;
- return error;
+ p.cb = cb;
+ p.data = data;
+ return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
}
-/* The following four convenience functions use a struct node_entry
+/* The following two 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
* ID's.
*/
-void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
+/**
+ * hpsb_node_fill_packet - fill some destination information into a packet
+ * @ne: destination node
+ * @packet: packet to fill in
+ *
+ * This will fill in the given, pre-initialised hpsb_packet with the current
+ * information from the node entry (host, node ID, bus generation number).
+ */
+void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
{
- pkt->host = ne->host;
- pkt->generation = ne->generation;
- barrier();
- pkt->node_id = ne->nodeid;
+ packet->host = ne->host;
+ packet->generation = ne->generation;
+ smp_rmb();
+ packet->node_id = ne->nodeid;
}
int hpsb_node_write(struct node_entry *ne, u64 addr,
{
unsigned int generation = ne->generation;
- barrier();
+ smp_rmb();
return hpsb_write(ne->host, ne->nodeid, generation,
addr, buffer, length);
}
struct host_info *hi;
hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
-
if (!hi) {
- HPSB_ERR ("NodeMgr: out of memory in add host");
+ 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);
+ hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
+ host->id);
+ if (IS_ERR(hi->thread)) {
+ HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
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;
+ if (hi) {
+ HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
+ wake_up_process(hi->thread);
+ }
}
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;
+ kthread_stop(hi->thread);
+ nodemgr_remove_host_dev(&host->device);
+ }
}
static struct hpsb_highlevel nodemgr_highlevel = {
int init_ieee1394_nodemgr(void)
{
- int ret;
+ int error;
- 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;
- }
+ error = class_register(&nodemgr_ne_class);
+ if (error)
+ goto fail_ne;
+ error = class_register(&nodemgr_ud_class);
+ if (error)
+ goto fail_ud;
+ error = driver_register(&nodemgr_mid_layer_driver);
+ if (error)
+ goto fail_ml;
+ /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
+ nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
hpsb_register_highlevel(&nodemgr_highlevel);
-
return 0;
+
+fail_ml:
+ class_unregister(&nodemgr_ud_class);
+fail_ud:
+ class_unregister(&nodemgr_ne_class);
+fail_ne:
+ return error;
}
void cleanup_ieee1394_nodemgr(void)
{
- hpsb_unregister_highlevel(&nodemgr_highlevel);
-
+ hpsb_unregister_highlevel(&nodemgr_highlevel);
+ driver_unregister(&nodemgr_mid_layer_driver);
class_unregister(&nodemgr_ud_class);
class_unregister(&nodemgr_ne_class);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff