NFC: nci: Add function to get max packet size for conn

FDP driver needs to send the firmware as regular packets
(not fragmented). The driver should have a way to
get the max packet size for a given connection.

Signed-off-by: Robert Dolca <robert.dolca@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index d0d0f1e53bb95efccfa7e1f311957087ae7724c4..aaada20bf78e60f9ea3b64d4551596e94910a4f8 100644 (file)
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -351,6 +351,7 @@ int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
+int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id);
 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
                                __u8 conn_id, int err);
 void nci_hci_data_received_cb(void *context, struct sk_buff *skb, int err);

diff --git a/net/nfc/nci/data.c b/net/nfc/nci/data.c
index 83acd189c13ab77b14345d7f595fdd020089f24d..dbd24254412a69d4c18c69a37d90608854a2ba9e 100644 (file)
--- a/net/nfc/nci/data.c
+++ b/net/nfc/nci/data.c
@@ -90,6 +90,18 @@ static inline void nci_push_data_hdr(struct nci_dev *ndev,
        nci_pbf_set((__u8 *)hdr, pbf);
 }
 
+int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id)
+{
+       struct nci_conn_info *conn_info;
+
+       conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
+       if (!conn_info)
+               return -EPROTO;
+
+       return conn_info->max_pkt_payload_len;
+}
+EXPORT_SYMBOL(nci_conn_max_data_pkt_payload_size);
+
 static int nci_queue_tx_data_frags(struct nci_dev *ndev,
                                   __u8 conn_id,
                                   struct sk_buff *skb) {