Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/include/net/caif/caif_dev.h b/include/net/caif/caif_dev.h
new file mode 100644
index 000000000..0baf2e21a
--- /dev/null
+++ b/include/net/caif/caif_dev.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author:	Sjur Brendeland
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef CAIF_DEV_H_
+#define CAIF_DEV_H_
+
+#include <net/caif/caif_layer.h>
+#include <net/caif/cfcnfg.h>
+#include <net/caif/caif_device.h>
+#include <linux/caif/caif_socket.h>
+#include <linux/if.h>
+#include <linux/net.h>
+
+/**
+ * struct caif_param - CAIF parameters.
+ * @size:	Length of data
+ * @data:	Binary Data Blob
+ */
+struct caif_param {
+	u16  size;
+	u8   data[256];
+};
+
+/**
+ * struct caif_connect_request - Request data for CAIF channel setup.
+ * @protocol:		Type of CAIF protocol to use (at, datagram etc)
+ * @sockaddr:		Socket address to connect.
+ * @priority:		Priority of the connection.
+ * @link_selector:	Link selector (high bandwidth or low latency)
+ * @ifindex:		kernel index of the interface.
+ * @param:		Connect Request parameters (CAIF_SO_REQ_PARAM).
+ *
+ * This struct is used when connecting a CAIF channel.
+ * It contains all CAIF channel configuration options.
+ */
+struct caif_connect_request {
+	enum caif_protocol_type protocol;
+	struct sockaddr_caif sockaddr;
+	enum caif_channel_priority priority;
+	enum caif_link_selector link_selector;
+	int ifindex;
+	struct caif_param param;
+};
+
+/**
+ * caif_connect_client - Connect a client to CAIF Core Stack.
+ * @config:		Channel setup parameters, specifying what address
+ *			to connect on the Modem.
+ * @client_layer:	User implementation of client layer. This layer
+ *			MUST have receive and control callback functions
+ *			implemented.
+ * @ifindex:		Link layer interface index used for this connection.
+ * @headroom:		Head room needed by CAIF protocol.
+ * @tailroom:		Tail room needed by CAIF protocol.
+ *
+ * This function connects a CAIF channel. The Client must implement
+ * the struct cflayer. This layer represents the Client layer and holds
+ * receive functions and control callback functions. Control callback
+ * function will receive information about connect/disconnect responses,
+ * flow control etc (see enum caif_control).
+ * E.g. CAIF Socket will call this function for each socket it connects
+ * and have one client_layer instance for each socket.
+ */
+int caif_connect_client(struct net *net,
+			struct caif_connect_request *conn_req,
+			struct cflayer *client_layer, int *ifindex,
+			int *headroom, int *tailroom);
+
+/**
+ * caif_disconnect_client - Disconnects a client from the CAIF stack.
+ *
+ * @client_layer: Client layer to be disconnected.
+ */
+int caif_disconnect_client(struct net *net, struct cflayer *client_layer);
+
+
+/**
+ * caif_client_register_refcnt - register ref-count functions provided by client.
+ *
+ * @adapt_layer: Client layer using CAIF Stack.
+ * @hold:	Function provided by client layer increasing ref-count
+ * @put:	Function provided by client layer decreasing ref-count
+ *
+ * Client of the CAIF Stack must register functions for reference counting.
+ * These functions are called by the CAIF Stack for every upstream packet,
+ * and must therefore be implemented efficiently.
+ *
+ * Client should call caif_free_client when reference count degrease to zero.
+ */
+
+void caif_client_register_refcnt(struct cflayer *adapt_layer,
+					void (*hold)(struct cflayer *lyr),
+					void (*put)(struct cflayer *lyr));
+/**
+ * caif_free_client - Free memory used to manage the client in the CAIF Stack.
+ *
+ * @client_layer: Client layer to be removed.
+ *
+ * This function must be called from client layer in order to free memory.
+ * Caller must guarantee that no packets are in flight upstream when calling
+ * this function.
+ */
+void caif_free_client(struct cflayer *adap_layer);
+
+/**
+ * struct caif_enroll_dev - Enroll a net-device as a CAIF Link layer
+ * @dev:		Network device to enroll.
+ * @caifdev:		Configuration information from CAIF Link Layer
+ * @link_support:	Link layer support layer
+ * @head_room:		Head room needed by link support layer
+ * @layer:		Lowest layer in CAIF stack
+ * @rcv_fun:		Receive function for CAIF stack.
+ *
+ * This function enroll a CAIF link layer into CAIF Stack and
+ * expects the interface to be able to handle CAIF payload.
+ * The link_support layer is used to add any Link Layer specific
+ * framing.
+ */
+int caif_enroll_dev(struct net_device *dev, struct caif_dev_common *caifdev,
+			struct cflayer *link_support, int head_room,
+			struct cflayer **layer, int (**rcv_func)(
+				struct sk_buff *, struct net_device *,
+				struct packet_type *, struct net_device *));
+
+#endif /* CAIF_DEV_H_ */