X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Facpi%2Fevent.c;h=c511071bfd79bfac075012eb52f90d9a45646acc;hb=c8a72c00c6a58186c35901c5fb15584ebc2a081d;hp=ce8d3eec3911df4bd9c59e405f5f49d0b1f3b903;hpb=c65ade4dc8b486e8c8b9b0a6399789a5428e2039;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c index ce8d3ee..c511071 100644 --- a/drivers/acpi/event.c +++ b/drivers/acpi/event.c @@ -11,18 +11,22 @@ #include #include #include +#include +#include + +#include "internal.h" #define _COMPONENT ACPI_SYSTEM_COMPONENT -ACPI_MODULE_NAME ("event") +ACPI_MODULE_NAME("event"); +#ifdef CONFIG_ACPI_PROC_EVENT /* Global vars for handling event proc entry */ static DEFINE_SPINLOCK(acpi_system_event_lock); -int event_is_open = 0; -extern struct list_head acpi_bus_event_list; -extern wait_queue_head_t acpi_bus_event_queue; +int event_is_open = 0; +extern struct list_head acpi_bus_event_list; +extern wait_queue_head_t acpi_bus_event_queue; -static int -acpi_system_open_event(struct inode *inode, struct file *file) +static int acpi_system_open_event(struct inode *inode, struct file *file) { spin_lock_irq(&acpi_system_event_lock); @@ -34,39 +38,38 @@ acpi_system_open_event(struct inode *inode, struct file *file) spin_unlock_irq(&acpi_system_event_lock); return 0; -out_busy: + out_busy: spin_unlock_irq(&acpi_system_event_lock); return -EBUSY; } static ssize_t -acpi_system_read_event(struct file *file, char __user *buffer, size_t count, loff_t *ppos) +acpi_system_read_event(struct file *file, char __user * buffer, size_t count, + loff_t * ppos) { - int result = 0; - struct acpi_bus_event event; - static char str[ACPI_MAX_STRING]; - static int chars_remaining = 0; - static char *ptr; - - - ACPI_FUNCTION_TRACE("acpi_system_read_event"); + int result = 0; + struct acpi_bus_event event; + static char str[ACPI_MAX_STRING]; + static int chars_remaining = 0; + static char *ptr; if (!chars_remaining) { memset(&event, 0, sizeof(struct acpi_bus_event)); if ((file->f_flags & O_NONBLOCK) && (list_empty(&acpi_bus_event_list))) - return_VALUE(-EAGAIN); + return -EAGAIN; result = acpi_bus_receive_event(&event); - if (result) { - return_VALUE(-EIO); - } - - chars_remaining = sprintf(str, "%s %s %08x %08x\n", - event.device_class?event.device_class:"", - event.bus_id?event.bus_id:"", - event.type, event.data); + if (result) + return result; + + chars_remaining = sprintf(str, "%s %s %08x %08x\n", + event.device_class ? event. + device_class : "", + event.bus_id ? event. + bus_id : "", event.type, + event.data); ptr = str; } @@ -75,26 +78,24 @@ acpi_system_read_event(struct file *file, char __user *buffer, size_t count, lof } if (copy_to_user(buffer, ptr, count)) - return_VALUE(-EFAULT); + return -EFAULT; *ppos += count; chars_remaining -= count; ptr += count; - return_VALUE(count); + return count; } -static int -acpi_system_close_event(struct inode *inode, struct file *file) +static int acpi_system_close_event(struct inode *inode, struct file *file) { - spin_lock_irq (&acpi_system_event_lock); + spin_lock_irq(&acpi_system_event_lock); event_is_open = 0; - spin_unlock_irq (&acpi_system_event_lock); + spin_unlock_irq(&acpi_system_event_lock); return 0; } -static unsigned int -acpi_system_poll_event(struct file *file, poll_table *wait) +static unsigned int acpi_system_poll_event(struct file *file, poll_table * wait) { poll_wait(file, &acpi_bus_event_queue, wait); if (!list_empty(&acpi_bus_event_list)) @@ -102,33 +103,203 @@ acpi_system_poll_event(struct file *file, poll_table *wait) return 0; } -static struct file_operations acpi_system_event_ops = { - .open = acpi_system_open_event, - .read = acpi_system_read_event, - .release = acpi_system_close_event, - .poll = acpi_system_poll_event, +static const struct file_operations acpi_system_event_ops = { + .owner = THIS_MODULE, + .open = acpi_system_open_event, + .read = acpi_system_read_event, + .release = acpi_system_close_event, + .poll = acpi_system_poll_event, }; +#endif /* CONFIG_ACPI_PROC_EVENT */ + +/* ACPI notifier chain */ +static BLOCKING_NOTIFIER_HEAD(acpi_chain_head); + +int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data) +{ + struct acpi_bus_event event; + + strcpy(event.device_class, dev->pnp.device_class); + strcpy(event.bus_id, dev->pnp.bus_id); + event.type = type; + event.data = data; + return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event) + == NOTIFY_BAD) ? -EINVAL : 0; +} +EXPORT_SYMBOL(acpi_notifier_call_chain); + +int register_acpi_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&acpi_chain_head, nb); +} +EXPORT_SYMBOL(register_acpi_notifier); + +int unregister_acpi_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&acpi_chain_head, nb); +} +EXPORT_SYMBOL(unregister_acpi_notifier); + +#ifdef CONFIG_NET +static unsigned int acpi_event_seqnum; +struct acpi_genl_event { + acpi_device_class device_class; + char bus_id[15]; + u32 type; + u32 data; +}; + +/* attributes of acpi_genl_family */ +enum { + ACPI_GENL_ATTR_UNSPEC, + ACPI_GENL_ATTR_EVENT, /* ACPI event info needed by user space */ + __ACPI_GENL_ATTR_MAX, +}; +#define ACPI_GENL_ATTR_MAX (__ACPI_GENL_ATTR_MAX - 1) + +/* commands supported by the acpi_genl_family */ +enum { + ACPI_GENL_CMD_UNSPEC, + ACPI_GENL_CMD_EVENT, /* kernel->user notifications for ACPI events */ + __ACPI_GENL_CMD_MAX, +}; +#define ACPI_GENL_CMD_MAX (__ACPI_GENL_CMD_MAX - 1) + +#define ACPI_GENL_FAMILY_NAME "acpi_event" +#define ACPI_GENL_VERSION 0x01 +#define ACPI_GENL_MCAST_GROUP_NAME "acpi_mc_group" + +static struct genl_family acpi_event_genl_family = { + .id = GENL_ID_GENERATE, + .name = ACPI_GENL_FAMILY_NAME, + .version = ACPI_GENL_VERSION, + .maxattr = ACPI_GENL_ATTR_MAX, +}; + +static struct genl_multicast_group acpi_event_mcgrp = { + .name = ACPI_GENL_MCAST_GROUP_NAME, +}; + +int acpi_bus_generate_netlink_event(const char *device_class, + const char *bus_id, + u8 type, int data) +{ + struct sk_buff *skb; + struct nlattr *attr; + struct acpi_genl_event *event; + void *msg_header; + int size; + int result; + + /* allocate memory */ + size = nla_total_size(sizeof(struct acpi_genl_event)) + + nla_total_size(0); + + skb = genlmsg_new(size, GFP_ATOMIC); + if (!skb) + return -ENOMEM; + + /* add the genetlink message header */ + msg_header = genlmsg_put(skb, 0, acpi_event_seqnum++, + &acpi_event_genl_family, 0, + ACPI_GENL_CMD_EVENT); + if (!msg_header) { + nlmsg_free(skb); + return -ENOMEM; + } + + /* fill the data */ + attr = + nla_reserve(skb, ACPI_GENL_ATTR_EVENT, + sizeof(struct acpi_genl_event)); + if (!attr) { + nlmsg_free(skb); + return -EINVAL; + } + + event = nla_data(attr); + if (!event) { + nlmsg_free(skb); + return -EINVAL; + } + + memset(event, 0, sizeof(struct acpi_genl_event)); + + strcpy(event->device_class, device_class); + strcpy(event->bus_id, bus_id); + event->type = type; + event->data = data; + + /* send multicast genetlink message */ + result = genlmsg_end(skb, msg_header); + if (result < 0) { + nlmsg_free(skb); + return result; + } + + genlmsg_multicast(skb, 0, acpi_event_mcgrp.id, GFP_ATOMIC); + return 0; +} + +EXPORT_SYMBOL(acpi_bus_generate_netlink_event); + +static int acpi_event_genetlink_init(void) +{ + int result; + + result = genl_register_family(&acpi_event_genl_family); + if (result) + return result; + + result = genl_register_mc_group(&acpi_event_genl_family, + &acpi_event_mcgrp); + if (result) + genl_unregister_family(&acpi_event_genl_family); + + return result; +} + +#else +int acpi_bus_generate_netlink_event(const char *device_class, + const char *bus_id, + u8 type, int data) +{ + return 0; +} + +EXPORT_SYMBOL(acpi_bus_generate_netlink_event); + +static int acpi_event_genetlink_init(void) +{ + return -ENODEV; +} +#endif static int __init acpi_event_init(void) { - struct proc_dir_entry *entry; +#ifdef CONFIG_ACPI_PROC_EVENT + struct proc_dir_entry *entry; +#endif int error = 0; - ACPI_FUNCTION_TRACE("acpi_event_init"); - if (acpi_disabled) - return_VALUE(0); + return 0; + /* create genetlink for acpi event */ + error = acpi_event_genetlink_init(); + if (error) + printk(KERN_WARNING PREFIX + "Failed to create genetlink family for ACPI event\n"); + +#ifdef CONFIG_ACPI_PROC_EVENT /* 'event' [R] */ - entry = create_proc_entry("event", S_IRUSR, acpi_root_dir); - if (entry) - entry->proc_fops = &acpi_system_event_ops; - else { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Unable to create '%s' proc fs entry\n","event" )); - error = -EFAULT; - } - return_VALUE(error); + entry = proc_create("event", S_IRUSR, acpi_root_dir, + &acpi_system_event_ops); + if (!entry) + return -ENODEV; +#endif + + return 0; } -subsys_initcall(acpi_event_init); +fs_initcall(acpi_event_init);