NFC: Add target mode activation netlink event
Userspace gets a netlink event upon target mode activation.
The LLCP layer is also signaled when we get an ATR_REQ in order to get
the remote general bytes.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/net/nfc/core.c b/net/nfc/core.c
index c83717b..17f1474 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -455,6 +455,41 @@
}
EXPORT_SYMBOL(nfc_get_local_general_bytes);
+int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
+ u8 *gb, size_t gb_len)
+{
+ int rc;
+
+ device_lock(&dev->dev);
+
+ dev->polling = false;
+
+ if (gb != NULL) {
+ rc = nfc_set_remote_general_bytes(dev, gb, gb_len);
+ if (rc < 0)
+ goto out;
+ }
+
+ if (protocol == NFC_PROTO_NFC_DEP_MASK)
+ nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET);
+
+ rc = nfc_genl_tm_activated(dev, protocol);
+
+out:
+ device_unlock(&dev->dev);
+
+ return rc;
+}
+EXPORT_SYMBOL(nfc_tm_activated);
+
+int nfc_tm_deactivated(struct nfc_dev *dev)
+{
+ dev->dep_link_up = false;
+
+ return nfc_genl_tm_deactivated(dev);
+}
+EXPORT_SYMBOL(nfc_tm_deactivated);
+
/**
* nfc_alloc_send_skb - allocate a skb for data exchange responses
*
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index a18fd56..21eaa9b 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -221,6 +221,68 @@
return -EMSGSIZE;
}
+int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_EVENT_TM_ACTIVATED);
+ if (!hdr)
+ goto free_msg;
+
+ if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
+int nfc_genl_tm_deactivated(struct nfc_dev *dev)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_EVENT_TM_DEACTIVATED);
+ if (!hdr)
+ goto free_msg;
+
+ if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
int nfc_genl_device_added(struct nfc_dev *dev)
{
struct sk_buff *msg;
diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h
index 7d9708f..cd9fcbe 100644
--- a/net/nfc/nfc.h
+++ b/net/nfc/nfc.h
@@ -128,6 +128,9 @@
u8 comm_mode, u8 rf_mode);
int nfc_genl_dep_link_down_event(struct nfc_dev *dev);
+int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol);
+int nfc_genl_tm_deactivated(struct nfc_dev *dev);
+
struct nfc_dev *nfc_get_device(unsigned int idx);
static inline void nfc_put_device(struct nfc_dev *dev)
