Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / acpi / event.c

diff --git a/kernel/drivers/acpi/event.c b/kernel/drivers/acpi/event.c
new file mode 100644 (file)
index 0000000..e24ea4e
--- /dev/null
+++ b/kernel/drivers/acpi/event.c
@@ -0,0 +1,183 @@
+/*
+ * event.c - exporting ACPI events via procfs
+ *
+ *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <linux/export.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/gfp.h>
+#include <linux/acpi.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+
+#include "internal.h"
+
+#define _COMPONENT             ACPI_SYSTEM_COMPONENT
+ACPI_MODULE_NAME("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 const struct genl_multicast_group acpi_event_mcgrps[] = {
+       { .name = ACPI_GENL_MCAST_GROUP_NAME, },
+};
+
+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,
+       .mcgrps = acpi_event_mcgrps,
+       .n_mcgrps = ARRAY_SIZE(acpi_event_mcgrps),
+};
+
+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;
+
+       /* 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);
+       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 */
+       genlmsg_end(skb, msg_header);
+
+       genlmsg_multicast(&acpi_event_genl_family, skb, 0, 0, GFP_ATOMIC);
+       return 0;
+}
+
+EXPORT_SYMBOL(acpi_bus_generate_netlink_event);
+
+static int acpi_event_genetlink_init(void)
+{
+       return genl_register_family(&acpi_event_genl_family);
+}
+
+#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)
+{
+       int error = 0;
+
+       if (acpi_disabled)
+               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");
+       return 0;
+}
+
+fs_initcall(acpi_event_init);