X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fieee1394%2Fnodemgr.c;h=e2e0771bff9b84837af3745daafb0bbe0ebd36ab;hb=refs%2Fheads%2Fvserver;hp=cc9c999f9a8bc565d8311620569431248d7dfb1c;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index cc9c999f9..e2e0771bf 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -8,36 +8,36 @@ * directory of the kernel sources for details. */ +#include #include -#include #include #include -#include -#include -#include -#include #include -#include +#include +#include #include -#include +#include #include -#include "ieee1394_types.h" -#include "ieee1394.h" +#include "csr.h" +#include "highlevel.h" #include "hosts.h" +#include "ieee1394.h" +#include "ieee1394_core.h" +#include "ieee1394_hotplug.h" +#include "ieee1394_types.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); +static int ignore_drivers; +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; + unsigned int speed_unverified:1; }; @@ -57,25 +57,76 @@ static char *nodemgr_find_oui_name(int oui) return NULL; } +/* + * Correct the speed map entry. This is necessary + * - for nodes with link speed < phy speed, + * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. + * A possible speed is determined by trial and error, using quadlet reads. + */ +static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, + quadlet_t *buffer) +{ + quadlet_t q; + u8 i, *speed, old_speed, good_speed; + int error; + + speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); + old_speed = *speed; + good_speed = IEEE1394_SPEED_MAX + 1; + + /* Try every speed from S100 to old_speed. + * If we did it the other way around, a too low speed could be caught + * if the retry succeeded for some other reason, e.g. because the link + * just finished its initialization. */ + for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { + *speed = i; + error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, + &q, sizeof(quadlet_t)); + if (error) + break; + *buffer = q; + good_speed = i; + } + if (good_speed <= IEEE1394_SPEED_MAX) { + HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", + NODE_BUS_ARGS(ci->host, ci->nodeid), + hpsb_speedto_str[good_speed]); + *speed = good_speed; + ci->speed_unverified = 0; + return 0; + } + *speed = old_speed; + return error; +} static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, - void *buffer, void *__ci) + void *buffer, void *__ci) { struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; - int i, ret = 0; + int i, error; - for (i = 0; i < 3; i++) { - ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, - buffer, length); - if (!ret) + for (i = 1; ; i++) { + error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, + buffer, length); + if (!error) { + ci->speed_unverified = 0; + break; + } + /* Give up after 3rd failure. */ + if (i == 3) break; - set_current_state(TASK_INTERRUPTIBLE); - if (schedule_timeout (HZ/3)) + /* 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)) { + error = nodemgr_check_speed(ci, addr, buffer); + if (!error) + break; + } + if (msleep_interruptible(334)) return -EINTR; } - - return ret; + return error; } static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) @@ -109,21 +160,17 @@ static struct csr1212_bus_ops nodemgr_csr_ops = { * but now we are much simpler because of the LDM. */ -static DECLARE_MUTEX(nodemgr_serialize); +static DEFINE_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_hotplug(struct class_device *cdev, char **envp, int num_envp, - char *buffer, int buffer_size); +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); @@ -148,7 +195,7 @@ static void ne_cls_release(struct class_device *class_dev) put_device(&container_of((class_dev), struct node_entry, class_dev)->device); } -struct class nodemgr_ne_class = { +static struct class nodemgr_ne_class = { .name = "ieee1394_node", .release = ne_cls_release, }; @@ -160,10 +207,10 @@ static void ud_cls_release(struct class_device *class_dev) /* The name here is only so that unit directory hotplug works with old * style hotplug, which only ever did unit directories anyway. */ -struct class nodemgr_ud_class = { +static struct class nodemgr_ud_class = { .name = "ieee1394", .release = ud_cls_release, - .hotplug = nodemgr_hotplug, + .uevent = nodemgr_uevent, }; static struct hpsb_highlevel nodemgr_highlevel; @@ -214,6 +261,16 @@ static struct device nodemgr_dev_template_ne = { .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, @@ -221,7 +278,7 @@ struct device nodemgr_dev_template_host = { #define fw_attr(class, class_type, field, type, format_string) \ -static ssize_t fw_show_##class##_##field (struct device *dev, char *buf)\ +static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ { \ class_type *class; \ class = container_of(dev, class_type, device); \ @@ -233,7 +290,7 @@ static struct device_attribute dev_attr_##class##_##field = { \ }; #define fw_attr_td(class, class_type, td_kv) \ -static ssize_t fw_show_##class##_##td_kv (struct device *dev, char *buf)\ +static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ { \ int len; \ class_type *class = container_of(dev, class_type, device); \ @@ -261,12 +318,12 @@ static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ 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 ssize_t fw_show_ne_bus_options(struct device *dev, char *buf) +static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) { struct node_entry *ne = container_of(dev, struct node_entry, device); @@ -282,50 +339,62 @@ static ssize_t fw_show_ne_bus_options(struct device *dev, char *buf) 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) +#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", atomic_read(&ne->tpool->count.count) + 1); -} -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, 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, 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, const char *buf, size_t count) +static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, 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) + down_write(&ieee1394_bus_type.subsys.rwsem); + device_release_driver(dev); + up_write(&ieee1394_bus_type.subsys.rwsem); + } else if (state == 0) ud->ignore_driver = 0; return count; } -static ssize_t fw_get_ignore_driver(struct device *dev, char *buf) +static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) { struct unit_directory *ud = container_of(dev, struct unit_directory, device); @@ -354,27 +423,15 @@ static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) } 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) +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); + int error = 0; - return count; + if (simple_strtoul(buf, NULL, 10) == 1) + error = bus_rescan_devices(&ieee1394_bus_type); + return error ? error : count; } static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) { @@ -390,7 +447,7 @@ static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size if (state == 1) ignore_drivers = 1; - else if (!state) + else if (state == 0) ignore_drivers = 0; return count; @@ -429,9 +486,10 @@ 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 }; @@ -482,7 +540,7 @@ static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) int length = 0; char *scratch = buf; - driver = container_of(drv, struct hpsb_protocol_driver, driver); + driver = container_of(drv, struct hpsb_protocol_driver, driver); for (id = driver->id_table; id->match_flags != 0; id++) { int need_coma = 0; @@ -539,7 +597,11 @@ static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) 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 for driver %s", driver->name); } @@ -559,7 +621,12 @@ static void nodemgr_create_ne_dev_files(struct node_entry *ne) 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 for node %016Lx", + (unsigned long long)ne->guid); } @@ -569,11 +636,16 @@ static void nodemgr_create_host_dev_files(struct hpsb_host *host) 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 for host %d", host->id); } -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) { @@ -584,12 +656,18 @@ 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) @@ -598,32 +676,39 @@ 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 attributes for unit %s", + ud->device.bus_id); } static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) { - struct hpsb_protocol_driver *driver; - struct unit_directory *ud; + struct hpsb_protocol_driver *driver; + struct unit_directory *ud; struct ieee1394_device_id *id; /* We only match unit directories */ @@ -631,55 +716,77 @@ static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) 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; - if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && - id->model_id != ud->model_id) - continue; + driver = container_of(drv, struct hpsb_protocol_driver, driver); + 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_SPECIFIER_ID) && - id->specifier_id != ud->specifier_id) - continue; + if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && + id->model_id != ud->model_id) + continue; - if ((id->match_flags & IEEE1394_MATCH_VERSION) && - id->version != ud->version) - 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 DEFINE_MUTEX(nodemgr_serialize_remove_uds); + 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; - + struct class_device *cdev; + struct unit_directory *tmp, *ud; + + /* Iteration over nodemgr_ud_class.children has to be protected by + * nodemgr_ud_class.sem, but class_device_unregister() will eventually + * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time, + * release the semaphore, and then unregister the ud. Since this code + * may be called from other contexts besides the knodemgrds, protect the + * gap after release of the semaphore by nodemgr_serialize_remove_uds. + */ + mutex_lock(&nodemgr_serialize_remove_uds); + for (;;) { + ud = NULL; + down(&nodemgr_ud_class.sem); + list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { + tmp = container_of(cdev, struct unit_directory, + class_dev); + if (tmp->ne == ne) { + ud = tmp; + break; + } + } + up(&nodemgr_ud_class.sem); + if (ud == NULL) + break; class_device_unregister(&ud->class_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) @@ -696,14 +803,15 @@ static void nodemgr_remove_ne(struct node_entry *ne) put_device(dev); } +static int __nodemgr_remove_host_dev(struct device *dev, void *data) +{ + nodemgr_remove_ne(container_of(dev, struct node_entry, device)); + return 0; +} 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)); - + WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev)); sysfs_remove_link(&dev->kobj, "irm_id"); sysfs_remove_link(&dev->kobj, "busmgr_id"); sysfs_remove_link(&dev->kobj, "host_id"); @@ -717,16 +825,16 @@ static void nodemgr_update_bus_options(struct node_entry *ne) #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", @@ -743,21 +851,18 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr 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)); + struct node_entry *ne; - ne->tpool = &host->tpool[nodeid & NODE_MASK]; + ne = kzalloc(sizeof(*ne), GFP_KERNEL); + if (!ne) + goto fail_alloc; - ne->host = host; - ne->nodeid = nodeid; + ne->host = host; + ne->nodeid = nodeid; ne->generation = generation; ne->needs_probe = 1; - ne->guid = guid; + 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; @@ -773,12 +878,15 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr 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); + if (device_register(&ne->device)) + goto fail_devreg; + if (class_device_register(&ne->class_dev)) + goto fail_classdevreg; get_device(&ne->device); - if (ne->guid_vendor_oui) - device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui); + if (ne->guid_vendor_oui && + device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui)) + goto fail_addoiu; nodemgr_create_ne_dev_files(ne); nodemgr_update_bus_options(ne); @@ -787,18 +895,29 @@ static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr (host->node_id == nodeid) ? "Host" : "Node", NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); - return ne; + return ne; + +fail_addoiu: + put_device(&ne->device); +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 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) { + down(&nodemgr_ne_class.sem); + list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { ne = container_of(cdev, struct node_entry, class_dev); if (ne->guid == guid) { @@ -806,20 +925,20 @@ static struct node_entry *find_entry_by_guid(u64 guid) break; } } - up_read(&class->subsys.rwsem); + up(&nodemgr_ne_class.sem); - return ret_ne; + return ret_ne; } -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) { - 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) { + down(&nodemgr_ne_class.sem); + list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { ne = container_of(cdev, struct node_entry, class_dev); if (ne->host == host && ne->nodeid == nodeid) { @@ -827,12 +946,49 @@ static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t break; } } - up_read(&class->subsys.rwsem); + up(&nodemgr_ne_class.sem); 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); + + if (device_register(&ud->device)) + goto fail_devreg; + if (class_device_register(&ud->class_dev)) + goto fail_classdevreg; + get_device(&ud->device); + + if (ud->vendor_oui && + device_create_file(&ud->device, &dev_attr_ud_vendor_oui)) + goto fail_addoui; + nodemgr_create_ud_dev_files(ud); + + return; + +fail_addoui: + put_device(&ud->device); +fail_classdevreg: + device_unregister(&ud->device); +fail_devreg: + HPSB_ERR("Failed to create unit %s", ud->device.bus_id); +} + /* This implementation currently only scans the config rom and its * immediate unit directories looking for software_id and @@ -842,17 +998,15 @@ static struct unit_directory *nodemgr_process_unit_directory unsigned int *id, struct unit_directory *parent) { struct unit_directory *ud; - struct unit_directory *ud_temp = NULL; + 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); + ud = kzalloc(sizeof(*ud), 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; @@ -909,42 +1063,60 @@ static struct unit_directory *nodemgr_process_unit_directory break; case CSR1212_KV_ID_DEPENDENT_INFO: - if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { + /* Logical Unit Number */ + if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { + if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { + ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); + if (!ud_child) + goto unit_directory_error; + 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. */ + * doing SBP2 specific parsing. + */ + + /* first register the parent unit */ ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; - ud_temp = nodemgr_process_unit_directory(hi, ne, kv, id, - parent); + 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_temp == NULL) + if (ud_child == NULL) break; - - /* inherit unspecified values */ - if ((ud->flags & UNIT_DIRECTORY_VENDOR_ID) && - !(ud_temp->flags & UNIT_DIRECTORY_VENDOR_ID)) - { - ud_temp->flags |= UNIT_DIRECTORY_VENDOR_ID; - ud_temp->vendor_id = ud->vendor_id; - ud_temp->vendor_oui = ud->vendor_oui; - } + + /* inherit unspecified values, the driver core picks it up */ if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && - !(ud_temp->flags & UNIT_DIRECTORY_MODEL_ID)) + !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) { - ud_temp->flags |= UNIT_DIRECTORY_MODEL_ID; - ud_temp->model_id = ud->model_id; + ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; + ud_child->model_id = ud->model_id; } if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && - !(ud_temp->flags & UNIT_DIRECTORY_SPECIFIER_ID)) + !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) { - ud_temp->flags |= UNIT_DIRECTORY_SPECIFIER_ID; - ud_temp->specifier_id = ud->specifier_id; + ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; + ud_child->specifier_id = ud->specifier_id; } if ((ud->flags & UNIT_DIRECTORY_VERSION) && - !(ud_temp->flags & UNIT_DIRECTORY_VERSION)) + !(ud_child->flags & UNIT_DIRECTORY_VERSION)) { - ud_temp->flags |= UNIT_DIRECTORY_VERSION; - ud_temp->version = ud->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; @@ -954,37 +1126,15 @@ static struct unit_directory *nodemgr_process_unit_directory } last_key_id = kv->key.id; } - - memcpy(&ud->device, &nodemgr_dev_template_ud, - sizeof(ud->device)); - - if (parent) { - ud->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; - ud->device.parent = &parent->device; - } else - ud->device.parent = &ne->device; - - 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); + + /* 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); + kfree(ud); return NULL; } @@ -1032,20 +1182,28 @@ static void nodemgr_process_root_directory(struct host_info *hi, struct node_ent 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_oui && + device_create_file(&ne->device, &dev_attr_ne_vendor_oui)) + goto fail; + if (ne->vendor_name_kv && + device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv)) + goto fail; + return; +fail: + HPSB_ERR("Failed to add sysfs attribute for node %016Lx", + (unsigned long long)ne->guid); } #ifdef CONFIG_HOTPLUG -static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, - char *buffer, int buffer_size) +static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, + char *buffer, int buffer_size) { struct unit_directory *ud; int i = 0; int length = 0; + /* ieee1394:venNmoNspNverN */ + char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; if (!cdev) return -ENODEV; @@ -1072,6 +1230,12 @@ do { \ PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); PUT_ENVP("VERSION=%06x", ud->version); + snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", + ud->vendor_id, + ud->model_id, + ud->specifier_id, + ud->version); + PUT_ENVP("MODALIAS=%s", buf); #undef PUT_ENVP @@ -1082,8 +1246,8 @@ do { \ #else -static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, - char *buffer, int buffer_size) +static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, + char *buffer, int buffer_size) { return -ENODEV; } @@ -1091,16 +1255,20 @@ static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, #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) @@ -1143,6 +1311,13 @@ static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, /* 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) @@ -1162,8 +1337,9 @@ static void nodemgr_node_scan_one(struct host_info *hi, octlet_t guid; struct csr1212_csr *csr; struct nodemgr_csr_info *ci; + u8 *speed; - ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL); + ci = kmalloc(sizeof(*ci), GFP_KERNEL); if (!ci) return; @@ -1171,6 +1347,12 @@ static void nodemgr_node_scan_one(struct host_info *hi, ci->nodeid = nodeid; ci->generation = generation; + /* Prepare for speed probe which occurs when reading the ROM */ + speed = &(host->speed[NODEID_TO_NODE(nodeid)]); + if (*speed > host->csr.lnk_spd) + *speed = host->csr.lnk_spd; + ci->speed_unverified = *speed > IEEE1394_SPEED_100; + /* We need to detect when the ConfigROM's generation has changed, * so we only update the node's info when it needs to be. */ @@ -1209,29 +1391,27 @@ static void nodemgr_node_scan_one(struct host_info *hi, 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; + 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; + /* 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); - } + if (!sid->link_active) { + nodeid++; + continue; + } + nodemgr_node_scan_one(hi, nodeid++, generation); + } } @@ -1244,21 +1424,22 @@ static void nodemgr_suspend_ne(struct node_entry *ne) 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); + WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); - down_write(&ne->device.bus->subsys.rwsem); + down(&nodemgr_ud_class.sem); list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { ud = container_of(cdev, struct unit_directory, class_dev); - if (ud->ne != ne) continue; + down_write(&ieee1394_bus_type.subsys.rwsem); if (ud->device.driver && (!ud->device.driver->suspend || - ud->device.driver->suspend(&ud->device, 0, 0))) + ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) device_release_driver(&ud->device); + up_write(&ieee1394_bus_type.subsys.rwsem); } - up_write(&ne->device.bus->subsys.rwsem); + up(&nodemgr_ud_class.sem); } @@ -1270,17 +1451,18 @@ static void nodemgr_resume_ne(struct node_entry *ne) ne->in_limbo = 0; device_remove_file(&ne->device, &dev_attr_ne_in_limbo); - down_read(&ne->device.bus->subsys.rwsem); + down(&nodemgr_ud_class.sem); list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { ud = container_of(cdev, struct unit_directory, class_dev); - if (ud->ne != ne) continue; + down_read(&ieee1394_bus_type.subsys.rwsem); if (ud->device.driver && ud->device.driver->resume) - ud->device.driver->resume(&ud->device, 0); + ud->device.driver->resume(&ud->device); + up_read(&ieee1394_bus_type.subsys.rwsem); } - up_read(&ne->device.bus->subsys.rwsem); + up(&nodemgr_ud_class.sem); HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); @@ -1291,24 +1473,52 @@ 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) { + down(&nodemgr_ud_class.sem); + list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { ud = container_of(cdev, struct unit_directory, class_dev); - if (ud->ne != ne || !ud->device.driver) + if (ud->ne != ne) 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); + down_write(&ieee1394_bus_type.subsys.rwsem); + if (ud->device.driver) { + pdrv = container_of(ud->device.driver, + struct hpsb_protocol_driver, + driver); + if (pdrv->update && pdrv->update(ud)) + device_release_driver(&ud->device); } + up_write(&ieee1394_bus_type.subsys.rwsem); } - up_read(&class->subsys.rwsem); + up(&nodemgr_ud_class.sem); +} + + +/* 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 + * as a consequence of these clauses. + * + * Note that we cannot do a broadcast write to all nodes at once because some + * pre-1394a devices would hang. */ +static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) +{ + const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); + quadlet_t bc_remote, bc_local; + int error; + + if (!ne->host->is_irm || ne->generation != generation || + ne->nodeid == ne->host->node_id) + return; + + bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); + + /* Check if the register is implemented and 1394a compliant. */ + 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)); } @@ -1323,6 +1533,8 @@ static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int ge if (!dev) return; + nodemgr_irm_write_bc(ne, generation); + /* 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 @@ -1342,25 +1554,37 @@ static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int ge 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; + struct node_entry *ne; /* 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); + * unit-directories. + * + * Run updates before probes. Usually, updates are time-critical + * while probes are time-consuming. (Well, those probes need some + * improvement...) */ + + down(&nodemgr_ne_class.sem); + list_for_each_entry(cdev, &nodemgr_ne_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, &nodemgr_ne_class.children, node) { + ne = container_of(cdev, struct node_entry, class_dev); + if (ne->needs_probe) + nodemgr_probe_ne(hi, ne, generation); + } + up(&nodemgr_ne_class.sem); /* 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. + * were still on the bus. Another bus scan is 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 @@ -1371,14 +1595,30 @@ static void nodemgr_node_probe(struct host_info *hi, int generation) * just removed. */ if (generation == get_hpsb_generation(host)) - bus_rescan_devices(&ieee1394_bus_type); + if (bus_rescan_devices(&ieee1394_bus_type)) + HPSB_DEBUG("bus_rescan_devices had an error"); +} - return; +static int nodemgr_send_resume_packet(struct hpsb_host *host) +{ + struct hpsb_packet *packet; + int error = -ENOMEM; + + packet = hpsb_make_phypacket(host, + EXTPHYPACKET_TYPE_RESUME | + NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); + if (packet) { + packet->no_waiter = 1; + packet->generation = get_hpsb_generation(host); + error = hpsb_send_packet(packet); + } + if (error) + HPSB_WARN("fw-host%d: Failed to broadcast resume packet", + host->id); + return error; } -/* 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. */ +/* Perform a few high-level IRM responsibilities. */ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) { quadlet_t bc; @@ -1387,13 +1627,8 @@ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) 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)); + /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ + host->csr.broadcast_channel |= 0x40000000; /* If there is no bus manager then we should set the root node's * force_root bit to promote bus stability per the 1394 @@ -1401,9 +1636,13 @@ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) 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) + /* get cycle master capability flag from root node */ + if (host->is_cycmst || + (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), + (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), + &bc, sizeof(quadlet_t)) && + be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) hpsb_send_phy_config(host, root_node, -1); else { HPSB_DEBUG("The root node is not cycle master capable; " @@ -1422,6 +1661,13 @@ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) } } + /* Some devices suspend their ports while being connected to an inactive + * host adapter, i.e. if connected before the low-level driver is + * loaded. They become visible either when physically unplugged and + * replugged, or when receiving a resume packet. Send one once. */ + if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) + host->resume_packet_sent = 1; + return 1; } @@ -1433,7 +1679,7 @@ static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) quadlet_t bc; int status; - if (host->is_irm) + if (hpsb_disable_irm || host->is_irm) return 1; status = hpsb_read(host, LOCAL_BUS | (host->irm_id), @@ -1465,41 +1711,37 @@ 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); + unsigned int g, generation = 0; + int i, reset_cycles = 0; /* 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; + for (;;) { + /* Sleep until next bus reset */ + set_current_state(TASK_INTERRUPTIBLE); + if (get_hpsb_generation(host) == generation) + schedule(); + __set_current_state(TASK_RUNNING); + + /* Thread may have been woken up to freeze or to exit */ + if (try_to_freeze()) + continue; + if (kthread_should_stop()) + goto exit; - if (down_interruptible(&hi->reset_sem) || - down_interruptible(&nodemgr_serialize)) { - if (current->flags & PF_FREEZE) { - refrigerator(0); + if (mutex_lock_interruptible(&nodemgr_serialize)) { + if (try_to_freeze()) continue; - } - printk("NodeMgr: received unexpected signal?!\n" ); - break; + goto exit; } - if (hi->kill_me) - break; - /* 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 (schedule_timeout(HZ/16)) { - up(&nodemgr_serialize); - goto caught_signal; - } + if (msleep_interruptible(63) || kthread_should_stop()) + goto unlock_exit; /* Now get the generation in which the node ID's we collect * are valid. During the bus scan we will use this generation @@ -1510,32 +1752,23 @@ static int nodemgr_host_thread(void *__hi) /* 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) - goto caught_signal; + if (generation != g) + g = generation, i = 0; } - if (!nodemgr_check_irm_capability(host, reset_cycles)) { + if (!nodemgr_check_irm_capability(host, reset_cycles) || + !nodemgr_do_irm_duties(host, reset_cycles)) { reset_cycles++; - up(&nodemgr_serialize); + mutex_unlock(&nodemgr_serialize); continue; } + reset_cycles = 0; /* 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. */ + * would trigger uevents 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. */ @@ -1544,53 +1777,29 @@ static int nodemgr_host_thread(void *__hi) /* Update some of our sysfs symlinks */ nodemgr_update_host_dev_links(host); - up(&nodemgr_serialize); + mutex_unlock(&nodemgr_serialize); } - -caught_signal: +unlock_exit: + mutex_unlock(&nodemgr_serialize); +exit: HPSB_VERBOSE("NodeMgr: Exiting thread"); - - complete_and_exit(&hi->exited, 0); -} - -struct node_entry *hpsb_guid_get_entry(u64 guid) -{ - struct node_entry *ne; - - down(&nodemgr_serialize); - ne = find_entry_by_guid(guid); - up(&nodemgr_serialize); - - return ne; -} - -struct node_entry *hpsb_nodeid_get_entry(struct hpsb_host *host, nodeid_t nodeid) -{ - struct node_entry *ne; - - down(&nodemgr_serialize); - ne = find_entry_by_nodeid(host, nodeid); - up(&nodemgr_serialize); - - return ne; + return 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) { + down(&hpsb_host_class.sem); + list_for_each_entry(cdev, &hpsb_host_class.children, node) { host = container_of(cdev, struct hpsb_host, class_dev); if ((error = cb(host, __data))) break; } - up_read(&class->subsys.rwsem); + up(&hpsb_host_class.sem); return error; } @@ -1612,20 +1821,10 @@ int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)) void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt) { - pkt->host = ne->host; - pkt->generation = ne->generation; + pkt->host = ne->host; + pkt->generation = ne->generation; barrier(); - pkt->node_id = ne->nodeid; -} - -int hpsb_node_read(struct node_entry *ne, u64 addr, - quadlet_t *buffer, size_t length) -{ - unsigned int generation = ne->generation; - - barrier(); - return hpsb_read(ne->host, ne->nodeid, generation, - addr, buffer, length); + pkt->node_id = ne->nodeid; } int hpsb_node_write(struct node_entry *ne, u64 addr, @@ -1638,56 +1837,32 @@ int hpsb_node_write(struct node_entry *ne, u64 addr, addr, buffer, length); } -int hpsb_node_lock(struct node_entry *ne, u64 addr, - int extcode, quadlet_t *data, quadlet_t arg) -{ - unsigned int generation = ne->generation; - - barrier(); - return hpsb_lock(ne->host, ne->nodeid, generation, - addr, extcode, data, arg); -} - 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"); + 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, hi, "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) @@ -1695,18 +1870,9 @@ 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 = { @@ -1718,27 +1884,35 @@ 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); }