diff options
author | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
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committer | Len Brown <len.brown@intel.com> | 2006-01-07 03:50:18 -0500 |
commit | ed03f430cdc8c802652467e9097606fedc2c7abc (patch) | |
tree | 30941ec1e6f93e99358fefe18175e5dd800a4379 /drivers/ieee1394/nodemgr.c | |
parent | ed349a8a0a780ed27e2a765f16cee54d9b63bfee (diff) | |
parent | 6f957eaf79356a32e838f5f262ee9a60544b1d5b (diff) | |
download | op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.zip op-kernel-dev-ed03f430cdc8c802652467e9097606fedc2c7abc.tar.gz |
Pull pnpacpi into acpica branch
Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
-rw-r--r-- | drivers/ieee1394/nodemgr.c | 135 |
1 files changed, 97 insertions, 38 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index 7fff5a1..082c7fd 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -121,8 +121,8 @@ struct host_info { }; 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); @@ -162,7 +162,7 @@ static void ud_cls_release(struct class_device *class_dev) static struct class nodemgr_ud_class = { .name = "ieee1394", .release = ud_cls_release, - .hotplug = nodemgr_hotplug, + .uevent = nodemgr_uevent, }; static struct hpsb_highlevel nodemgr_highlevel; @@ -743,21 +743,20 @@ 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; + struct node_entry *ne; - memset(ne, 0, sizeof(struct node_entry)); + ne = kzalloc(sizeof(*ne), GFP_KERNEL); + if (!ne) + return NULL; ne->tpool = &host->tpool[nodeid & NODE_MASK]; - 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; @@ -787,7 +786,7 @@ 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; } @@ -872,12 +871,10 @@ static struct unit_directory *nodemgr_process_unit_directory 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; @@ -937,10 +934,10 @@ static struct unit_directory *nodemgr_process_unit_directory /* Logical Unit Number */ if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { - ud_child = kmalloc(sizeof(struct unit_directory), GFP_KERNEL); + ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL); if (!ud_child) goto unit_directory_error; - memcpy(ud_child, ud, sizeof(struct unit_directory)); + memcpy(ud_child, ud, sizeof(*ud_child)); nodemgr_register_device(ne, ud_child, &ne->device); ud_child = NULL; @@ -966,7 +963,7 @@ static struct unit_directory *nodemgr_process_unit_directory if (ud_child == NULL) break; - /* inherit unspecified values so hotplug picks it up */ + /* inherit unspecified values, the driver core picks it up */ if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) { @@ -1062,8 +1059,8 @@ static void nodemgr_process_root_directory(struct host_info *hi, struct node_ent #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; @@ -1112,8 +1109,8 @@ 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; } @@ -1200,7 +1197,7 @@ static void nodemgr_node_scan_one(struct host_info *hi, struct csr1212_csr *csr; struct nodemgr_csr_info *ci; - ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL); + ci = kmalloc(sizeof(*ci), GFP_KERNEL); if (!ci) return; @@ -1349,6 +1346,33 @@ static void nodemgr_update_pdrv(struct node_entry *ne) } +/* 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 ret; + + 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. */ + ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, + sizeof(bc_remote)); + if (!ret && 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) { struct device *dev; @@ -1360,6 +1384,8 @@ 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 @@ -1381,14 +1407,28 @@ 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. */ + * 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) - nodemgr_probe_ne(hi, container_of(cdev, struct node_entry, class_dev), 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); + } + 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); @@ -1413,9 +1453,26 @@ static void nodemgr_node_probe(struct host_info *hi, int generation) return; } -/* Because we are a 1394a-2000 compliant IRM, we need to inform all the other - * nodes of the broadcast channel. (Really we're only setting the validity - * bit). Other IRM responsibilities go in here as well. */ +static int nodemgr_send_resume_packet(struct hpsb_host *host) +{ + struct hpsb_packet *packet; + int ret = 1; + + 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); + ret = hpsb_send_packet(packet); + } + if (ret) + HPSB_WARN("fw-host%d: Failed to broadcast resume packet", + host->id); + return ret; +} + +/* Perform a few high-level IRM responsibilities. */ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) { quadlet_t bc; @@ -1424,13 +1481,8 @@ 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 @@ -1463,6 +1515,13 @@ 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; } @@ -1571,8 +1630,8 @@ static int nodemgr_host_thread(void *__hi) /* 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); /* This actually does the full probe, with sysfs |