net: Network initialization and tx/rx functionality
Functions to receive data from apps and transmit it to network, and receive from network and pass data to apps. Change-Id: I1b1b8c041e6c5e20294081d2cd403636e9909cdc Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
parent
3633410706
commit
4f5723a5d0
5 changed files with 549 additions and 1 deletions
159
include/net/net_buf.h
Normal file
159
include/net/net_buf.h
Normal file
|
@ -0,0 +1,159 @@
|
|||
/*! @file
|
||||
@brief Network buffer API
|
||||
|
||||
Network data is passed between application and IP stack via
|
||||
a net_buf struct.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2015 Intel Corporation
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1) Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* 3) Neither the name of Intel Corporation nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software without
|
||||
* specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/* Data buffer API - used for all data to/from net */
|
||||
|
||||
#ifndef __NET_BUF_H
|
||||
#define __NET_BUF_H
|
||||
|
||||
#include <stdint.h>
|
||||
#include <net/core/ip/uip.h>
|
||||
|
||||
struct net_context;
|
||||
|
||||
/*! The default MTU is 1280 (minimum IPv6 packet size) + LL header
|
||||
*/
|
||||
#define NET_BUF_MAX_DATA (UIP_LINK_MTU + UIP_LLH_LEN)
|
||||
|
||||
struct net_buf {
|
||||
/*! @cond ignore */
|
||||
/* FIFO uses first 4 bytes itself, reserve space */
|
||||
int __unused;
|
||||
/* @endcond */
|
||||
|
||||
/*! Network connection context */
|
||||
struct net_context *context;
|
||||
|
||||
/*! Buffer data length */
|
||||
uint16_t len;
|
||||
/*! Buffer head pointer */
|
||||
uint8_t *data;
|
||||
/*! Actual network buffer storage */
|
||||
uint8_t buf[NET_BUF_MAX_DATA];
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief Get buffer from the available buffers pool.
|
||||
*
|
||||
* @details Get network buffer from buffer pool. You must have
|
||||
* network context before able to use this function.
|
||||
*
|
||||
* @param context Network context that will be related to
|
||||
* this buffer.
|
||||
*
|
||||
* @return Network buffer if successful, NULL otherwise.
|
||||
*/
|
||||
struct net_buf *net_buf_get(struct net_context *context);
|
||||
|
||||
/*!
|
||||
* @brief Get buffer from pool but also reserve headroom for
|
||||
* potential headers.
|
||||
*
|
||||
* @details Normally this version is not useful for applications
|
||||
* but is mainly used by network fragmentation code.
|
||||
*
|
||||
* @param reserve How many bytes to reserve for headroom.
|
||||
*
|
||||
* @return Network buffer if successful, NULL otherwise.
|
||||
*/
|
||||
struct net_buf *net_buf_get_reserve(uint16_t reserve_head);
|
||||
|
||||
/*!
|
||||
* @brief Place buffer back into the available buffers pool.
|
||||
*
|
||||
* @details Releases the buffer to other use. This needs to be
|
||||
* called by application after it has finished with
|
||||
* the buffer.
|
||||
*
|
||||
* @param buf Network buffer to release.
|
||||
*
|
||||
*/
|
||||
void net_buf_put(struct net_buf *buf);
|
||||
|
||||
/*!
|
||||
* @brief Prepare data to be added at the end of the buffer.
|
||||
*
|
||||
* @details Move the tail pointer forward.
|
||||
*
|
||||
* @param buf Network buffer.
|
||||
* @param len Size of data to be added.
|
||||
*
|
||||
* @return Pointer to new tail.
|
||||
*/
|
||||
uint8_t *net_buf_add(struct net_buf *buf, uint16_t len);
|
||||
|
||||
/*!
|
||||
* @brief Push data to the beginning of the buffer.
|
||||
*
|
||||
* @details Move the data pointer backwards.
|
||||
*
|
||||
* @param buf Network buffer.
|
||||
* @param len Size of data to be added.
|
||||
*
|
||||
* @return Pointer to new head.
|
||||
*/
|
||||
uint8_t *net_buf_push(struct net_buf *buf, uint16_t len);
|
||||
|
||||
/*!
|
||||
* @brief Remove data from the beginning of the buffer.
|
||||
*
|
||||
* @details Move the data pointer forward.
|
||||
*
|
||||
* @param buf Network buffer.
|
||||
* @param len Size of data to be removed.
|
||||
*
|
||||
* @return Pointer to new head.
|
||||
*/
|
||||
uint8_t *net_buf_pull(struct net_buf *buf, uint16_t len);
|
||||
|
||||
/*! @def net_buf_tail
|
||||
*
|
||||
* @brief Return pointer to the end of the data in the buffer.
|
||||
*
|
||||
* @details This macro returns the tail of the buffer.
|
||||
*
|
||||
* @param buf Network buffer.
|
||||
*
|
||||
* @return Pointer to tail.
|
||||
*/
|
||||
#define net_buf_tail(buf) ((buf)->data + (buf)->len)
|
||||
|
||||
/*! @cond ignore */
|
||||
void net_buf_init(void);
|
||||
/* @endcond */
|
||||
|
||||
#endif /* __NET_BUF_H */
|
95
include/net/net_core.h
Normal file
95
include/net/net_core.h
Normal file
|
@ -0,0 +1,95 @@
|
|||
/*! @file
|
||||
@brief Network core definitions
|
||||
|
||||
Definitions for networking support.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2015 Intel Corporation
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1) Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* 3) Neither the name of Intel Corporation nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software without
|
||||
* specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <misc/printk.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <net/net_buf.h>
|
||||
|
||||
#ifndef __NET_CORE_H
|
||||
#define __NET_CORE_H
|
||||
|
||||
/* Network subsystem logging helpers */
|
||||
|
||||
#define NET_DBG(fmt, ...) printk("net: %s: " fmt, __func__, ##__VA_ARGS__)
|
||||
#define NET_ERR(fmt, ...) printk("net: %s: " fmt, __func__, ##__VA_ARGS__)
|
||||
#define NET_INFO(fmt, ...) printk("net: " fmt, ##__VA_ARGS__)
|
||||
#define NET_PRINT(fmt, ...) printk(fmt, ##__VA_ARGS__)
|
||||
|
||||
/*!
|
||||
* @brief Initialize network stack. This is will be automatically called
|
||||
* by the OS.
|
||||
*
|
||||
* @details No harm will happen if application calls this multiple times.
|
||||
*
|
||||
* @return 0 if ok, < 0 in case of error.
|
||||
*/
|
||||
int net_init(void);
|
||||
|
||||
struct net_driver {
|
||||
/*! How much headroom is needed for net transport headers */
|
||||
size_t head_reserve;
|
||||
|
||||
/*! Open the net transport */
|
||||
int (*open) (void);
|
||||
|
||||
/*! Send data to net */
|
||||
int (*send) (struct net_buf *buf);
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief Register a new network driver to the network stack.
|
||||
*
|
||||
* @details Only one network device can be registered at a time.
|
||||
*
|
||||
* @param buf Network driver.
|
||||
*
|
||||
* @return 0 if ok, < 0 in case of error.
|
||||
*/
|
||||
int net_register_driver(struct net_driver *drv);
|
||||
|
||||
/*!
|
||||
* @brief Unregister a previously registered network driver.
|
||||
*
|
||||
* @param buf Network driver.
|
||||
*
|
||||
* @details Networking will be disabled if there is no driver
|
||||
* available.
|
||||
*
|
||||
*/
|
||||
void net_unregister_driver(struct net_driver *drv);
|
||||
|
||||
#endif /* __NET_CORE_H */
|
|
@ -1,5 +1,11 @@
|
|||
UIP_MODULES = net/ip/contiki/ip \
|
||||
net/ip/contiki/ipv6
|
||||
net/ip/contiki/ipv6 \
|
||||
net/ip/contiki/mac \
|
||||
net/ip/contiki/mac/sicslowmac \
|
||||
net/ip/contiki/llsec \
|
||||
net/ip/contiki/os/dev \
|
||||
net/ip/contiki/os/sys \
|
||||
net/ip/contiki/os/lib
|
||||
|
||||
EXTRA_CFLAGS += ${PROJECTINCLUDE}
|
||||
EXTRA_CFLAGS += -I${srctree}/net/ip/contiki
|
||||
|
@ -17,5 +23,14 @@ MODULES_SOURCES = ${foreach d, $(UIP_MODULES), ${wildcard $(TIMO_BASE)/$(d)/*.c}
|
|||
MODULES_FILES = ${foreach f, $(MODULES_SOURCES), ${subst $(TIMO_BASE)/net/ip/,,${f}}}
|
||||
obj-y = ${foreach f, $(MODULES_FILES), ${subst .c,.o,${f}}}
|
||||
|
||||
obj-y += net_init.o \
|
||||
net_buf.o \
|
||||
contiki/netstack.o \
|
||||
contiki/packetbuf.o \
|
||||
contiki/uip-driver.o \
|
||||
contiki/nbr-table.o \
|
||||
contiki/linkaddr.o \
|
||||
contiki/queuebuf.o
|
||||
|
||||
# workaround for include file location
|
||||
CREATE_INCLUDE_LINK_net := $(shell ln -s ${TIMO_BASE}/net/ip/contiki ${TIMO_BASE}/net/ip/contiki/net > /dev/null 2>&1)
|
||||
|
|
108
net/ip/net_buf.c
Normal file
108
net/ip/net_buf.c
Normal file
|
@ -0,0 +1,108 @@
|
|||
/*! @file
|
||||
@brief Network buffers
|
||||
|
||||
Network data is passed between application and IP stack via
|
||||
a net_buf struct.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2015 Intel Corporation
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1) Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* 3) Neither the name of Intel Corporation nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software without
|
||||
* specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <nanokernel.h>
|
||||
#include <toolchain.h>
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include <net/net_core.h>
|
||||
#include <net/net_buf.h>
|
||||
|
||||
/* Available (free) buffers queue */
|
||||
#define NUM_BUFS 2
|
||||
static struct net_buf buffers[NUM_BUFS];
|
||||
static struct nano_fifo free_bufs;
|
||||
|
||||
struct net_buf *net_buf_get_reserve(uint16_t reserve_head)
|
||||
{
|
||||
struct net_buf *buf;
|
||||
|
||||
buf = nano_fifo_get(&free_bufs);
|
||||
if (!buf) {
|
||||
NET_ERR("Failed to get free buffer\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
buf->data = buf->buf + reserve_head;
|
||||
buf->len = 0;
|
||||
|
||||
NET_DBG("buf %p reserve %u\n", buf, reserve_head);
|
||||
|
||||
return buf;
|
||||
}
|
||||
|
||||
struct net_buf *net_buf_get(struct net_context *context)
|
||||
{
|
||||
return net_buf_get_reserve(0);
|
||||
}
|
||||
|
||||
void net_buf_put(struct net_buf *buf)
|
||||
{
|
||||
NET_DBG("buf %p\n", buf);
|
||||
|
||||
nano_fifo_put(&free_bufs, buf);
|
||||
}
|
||||
|
||||
uint8_t *net_buf_add(struct net_buf *buf, uint16_t len)
|
||||
{
|
||||
uint8_t *tail = buf->data + buf->len;
|
||||
buf->len += len;
|
||||
return tail;
|
||||
}
|
||||
|
||||
uint8_t *net_buf_push(struct net_buf *buf, uint16_t len)
|
||||
{
|
||||
buf->data -= len;
|
||||
buf->len += len;
|
||||
return buf->data;
|
||||
}
|
||||
|
||||
uint8_t *net_buf_pull(struct net_buf *buf, uint16_t len)
|
||||
{
|
||||
buf->len -= len;
|
||||
return buf->data += len;
|
||||
}
|
||||
|
||||
void net_buf_init(void)
|
||||
{
|
||||
nano_fifo_init(&free_bufs);
|
||||
|
||||
for (int i = 0; i < NUM_BUFS; i++) {
|
||||
nano_fifo_put(&free_bufs, &buffers[i]);
|
||||
}
|
||||
}
|
171
net/ip/net_init.c
Normal file
171
net/ip/net_init.c
Normal file
|
@ -0,0 +1,171 @@
|
|||
/*! @file
|
||||
@brief Network initialization
|
||||
|
||||
Initialize the network IP stack. Create two fibers, one for reading data
|
||||
from applications (Tx fiber) and one for reading data from IP stack
|
||||
and passing that data to applications (Rx fiber).
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2015 Intel Corporation
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1) Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* 3) Neither the name of Intel Corporation nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software without
|
||||
* specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#define DEBUG DEBUG_PRINT
|
||||
#include "contiki/ip/uip-debug.h"
|
||||
|
||||
#include <nanokernel.h>
|
||||
#include <toolchain.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include <net/net_core.h>
|
||||
#include <net/net_buf.h>
|
||||
|
||||
#include "net/core/netstack.h"
|
||||
#include "net/core/uip-driver.h"
|
||||
|
||||
/* Stacks for the tx & rx fibers.
|
||||
* FIXME: stack size needs fine-tuning
|
||||
*/
|
||||
#define STACKSIZE 2048
|
||||
static char rx_fiber_stack[STACKSIZE];
|
||||
static char tx_fiber_stack[STACKSIZE];
|
||||
|
||||
struct net_context {
|
||||
/* Application receives data via this fifo */
|
||||
struct nano_fifo rx_queue;
|
||||
};
|
||||
|
||||
static struct net_dev {
|
||||
/* Queue for incoming packets from driver */
|
||||
struct nano_fifo rx_queue;
|
||||
|
||||
/* Queue for outgoing packets from apps */
|
||||
struct nano_fifo tx_queue;
|
||||
|
||||
/* Registered network driver, FIXME: how this is set? */
|
||||
struct net_driver *drv;
|
||||
} netdev;
|
||||
|
||||
static void net_tx_fiber(void)
|
||||
{
|
||||
struct net_driver *drv = netdev.drv;
|
||||
|
||||
NET_DBG("\n");
|
||||
|
||||
while (1) {
|
||||
struct net_buf *buf;
|
||||
|
||||
/* Get next packet from application - wait if necessary */
|
||||
buf = nano_fifo_get_wait(&netdev.tx_queue);
|
||||
|
||||
NET_DBG("Sending (buf %p, len %u) to stack\n", buf, buf->len);
|
||||
|
||||
//drv->send(buf); // This is for further studies
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
static void net_rx_fiber(void)
|
||||
{
|
||||
struct net_buf *buf;
|
||||
|
||||
NET_DBG("\n");
|
||||
|
||||
while (1) {
|
||||
/* Wait next packet from network, pass it to IP stack */
|
||||
buf = nano_fifo_get_wait(&netdev.rx_queue);
|
||||
|
||||
net_buf_put(buf);
|
||||
}
|
||||
}
|
||||
|
||||
static void init_rx_queue(void)
|
||||
{
|
||||
nano_fifo_init(&netdev.rx_queue);
|
||||
|
||||
fiber_start(rx_fiber_stack, STACKSIZE,
|
||||
(nano_fiber_entry_t) net_rx_fiber, 0, 0, 7, 0);
|
||||
}
|
||||
|
||||
static void init_tx_queue(void)
|
||||
{
|
||||
nano_fifo_init(&netdev.tx_queue);
|
||||
|
||||
fiber_start(tx_fiber_stack, STACKSIZE,
|
||||
(nano_fiber_entry_t) net_tx_fiber, 0, 0, 7, 0);
|
||||
}
|
||||
|
||||
static int network_initialization(void)
|
||||
{
|
||||
netstack_init();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int net_register_driver(struct net_driver *drv)
|
||||
{
|
||||
if (netdev.drv) {
|
||||
return -EALREADY;
|
||||
}
|
||||
|
||||
if (!drv->open || !drv->send) {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
netdev.drv = drv;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void net_unregister_driver(struct net_driver *drv)
|
||||
{
|
||||
netdev.drv = NULL;
|
||||
}
|
||||
|
||||
int net_init(void)
|
||||
{
|
||||
struct net_driver *drv = netdev.drv;
|
||||
int err;
|
||||
|
||||
if (!drv) {
|
||||
NET_DBG("No network driver defined\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
net_buf_init();
|
||||
init_tx_queue();
|
||||
init_rx_queue();
|
||||
|
||||
err = drv->open();
|
||||
if (err) {
|
||||
return err;
|
||||
}
|
||||
|
||||
return network_initialization();
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue