usb: gadget: rndis: convert into module

In order to convert to configfs the usb functions need to be converted
to a new interface and compiled as modules. This patch creates an rndis
module which will be used by the new functions. After all users of
f_rndis are converted to the new interface, this module can be
merged with f_rndis module.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/Kconfig

@@ -502,6 +502,9 @@ config USB_U_SERIAL
 config USB_U_ETHER
 	tristate
 
+config USB_U_RNDIS
+	tristate
+
 config USB_F_SERIAL
 	tristate
 
@@ -599,6 +602,7 @@ config USB_ETH
 	depends on NET
 	select USB_LIBCOMPOSITE
 	select USB_U_ETHER
+	select USB_U_RNDIS
 	select CRC32
 	help
 	  This driver implements Ethernet style communication, in one of
@@ -724,6 +728,7 @@ config USB_FUNCTIONFS_RNDIS
 	bool "Include configuration with RNDIS (Ethernet)"
 	depends on USB_FUNCTIONFS && NET
 	select USB_U_ETHER
+	select USB_U_RNDIS
 	help
 	  Include a configuration with RNDIS function (Ethernet) and the Filesystem.
 
@@ -871,6 +876,7 @@ config USB_G_MULTI
 	select USB_LIBCOMPOSITE
 	select USB_U_SERIAL
 	select USB_U_ETHER
+	select USB_U_RNDIS
 	select USB_F_ACM
 	help
 	  The Multifunction Composite Gadget provides Ethernet (RNDIS

drivers/usb/gadget/Makefile

@@ -46,6 +46,8 @@ obj-$(CONFIG_USB_F_SERIAL)	+= usb_f_serial.o
 usb_f_obex-y			:= f_obex.o
 obj-$(CONFIG_USB_F_OBEX)	+= usb_f_obex.o
 obj-$(CONFIG_USB_U_ETHER)	+= u_ether.o
+u_rndis-y			:= rndis.o
+obj-$(CONFIG_USB_U_RNDIS)	+= u_rndis.o
 
 #
 # USB gadget drivers

drivers/usb/gadget/ether.c

@@ -91,6 +91,8 @@ static inline bool has_rndis(void)
 #endif
 }
 
+#include <linux/module.h>
+
 /*-------------------------------------------------------------------------*/
 
 /*
@@ -104,7 +106,7 @@ static inline bool has_rndis(void)
 #include "f_subset.c"
 #ifdef	USB_ETH_RNDIS
 #include "f_rndis.c"
-#include "rndis.c"
+#include "rndis.h"
 #endif
 #include "f_eem.c"
 

drivers/usb/gadget/g_ffs.c

@@ -32,7 +32,7 @@
 #  include "f_subset.c"
 #  ifdef USB_ETH_RNDIS
 #    include "f_rndis.c"
-#    include "rndis.c"
+#    include "rndis.h"
 #  endif
 #  include "u_ether.h"
 

drivers/usb/gadget/multi.c

@@ -47,7 +47,7 @@ MODULE_LICENSE("GPL");
 #include "f_subset.c"
 #ifdef USB_ETH_RNDIS
 #  include "f_rndis.c"
-#  include "rndis.c"
+#  include "rndis.h"
 #endif
 #include "u_ether.h"
 

drivers/usb/gadget/rndis.c

@@ -761,6 +761,7 @@ int rndis_signal_connect(int configNr)
 	return rndis_indicate_status_msg(configNr,
 					  RNDIS_STATUS_MEDIA_CONNECT);
 }
+EXPORT_SYMBOL(rndis_signal_connect);
 
 int rndis_signal_disconnect(int configNr)
 {
@@ -769,6 +770,7 @@ int rndis_signal_disconnect(int configNr)
 	return rndis_indicate_status_msg(configNr,
 					  RNDIS_STATUS_MEDIA_DISCONNECT);
 }
+EXPORT_SYMBOL(rndis_signal_disconnect);
 
 void rndis_uninit(int configNr)
 {
@@ -783,11 +785,13 @@ void rndis_uninit(int configNr)
 	while ((buf = rndis_get_next_response(configNr, &length)))
 		rndis_free_response(configNr, buf);
 }
+EXPORT_SYMBOL(rndis_uninit);
 
 void rndis_set_host_mac(int configNr, const u8 *addr)
 {
 	rndis_per_dev_params[configNr].host_mac = addr;
 }
+EXPORT_SYMBOL(rndis_set_host_mac);
 
 /*
  * Message Parser
@@ -870,6 +874,7 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 
 	return -ENOTSUPP;
 }
+EXPORT_SYMBOL(rndis_msg_parser);
 
 int rndis_register(void (*resp_avail)(void *v), void *v)
 {
@@ -891,6 +896,7 @@ int rndis_register(void (*resp_avail)(void *v), void *v)
 
 	return -ENODEV;
 }
+EXPORT_SYMBOL(rndis_register);
 
 void rndis_deregister(int configNr)
 {
@@ -899,6 +905,7 @@ void rndis_deregister(int configNr)
 	if (configNr >= RNDIS_MAX_CONFIGS) return;
 	rndis_per_dev_params[configNr].used = 0;
 }
+EXPORT_SYMBOL(rndis_deregister);
 
 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
 {
@@ -912,6 +919,7 @@ int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
 
 	return 0;
 }
+EXPORT_SYMBOL(rndis_set_param_dev);
 
 int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
 {
@@ -924,6 +932,7 @@ int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
 
 	return 0;
 }
+EXPORT_SYMBOL(rndis_set_param_vendor);
 
 int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
 {
@@ -935,6 +944,7 @@ int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
 
 	return 0;
 }
+EXPORT_SYMBOL(rndis_set_param_medium);
 
 void rndis_add_hdr(struct sk_buff *skb)
 {
@@ -949,6 +959,7 @@ void rndis_add_hdr(struct sk_buff *skb)
 	header->DataOffset = cpu_to_le32(36);
 	header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
 }
+EXPORT_SYMBOL(rndis_add_hdr);
 
 void rndis_free_response(int configNr, u8 *buf)
 {
@@ -965,6 +976,7 @@ void rndis_free_response(int configNr, u8 *buf)
 		}
 	}
 }
+EXPORT_SYMBOL(rndis_free_response);
 
 u8 *rndis_get_next_response(int configNr, u32 *length)
 {
@@ -986,6 +998,7 @@ u8 *rndis_get_next_response(int configNr, u32 *length)
 
 	return NULL;
 }
+EXPORT_SYMBOL(rndis_get_next_response);
 
 static rndis_resp_t *rndis_add_response(int configNr, u32 length)
 {
@@ -1029,6 +1042,7 @@ int rndis_rm_hdr(struct gether *port,
 	skb_queue_tail(list, skb);
 	return 0;
 }
+EXPORT_SYMBOL(rndis_rm_hdr);
 
 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
 
@@ -1160,6 +1174,7 @@ int rndis_init(void)
 
 	return 0;
 }
+EXPORT_SYMBOL(rndis_init);
 
 void rndis_exit(void)
 {
@@ -1173,3 +1188,6 @@ void rndis_exit(void)
 	}
 #endif
 }
+EXPORT_SYMBOL(rndis_exit);
+
+MODULE_LICENSE("GPL");

drivers/usb/gadget/rndis.h

@@ -16,6 +16,7 @@
 #define _LINUX_RNDIS_H
 
 #include <linux/rndis.h>
+#include "u_ether.h"
 #include "ndis.h"
 
 #define RNDIS_MAXIMUM_FRAME_SIZE	1518