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incubator-nuttx/drivers/net/rpmsgdrv.c

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/****************************************************************************
* drivers/net/rpmsgdrv.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <stdio.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/semaphore.h>
#include <nuttx/wqueue.h>
#include <nuttx/net/dns.h>
#include <nuttx/net/ip.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/pkt.h>
#include <nuttx/net/rpmsg.h>
#include <nuttx/rpmsg/rpmsg.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Work queue support is required. */
#if !defined(CONFIG_SCHED_WORKQUEUE)
# error Work queue support is required in this configuration (CONFIG_SCHED_WORKQUEUE)
#endif
#ifdef CONFIG_NET_DUMPPACKET
# define net_rpmsg_drv_dumppacket lib_dumpbuffer
#else
# define net_rpmsg_drv_dumppacket(m, b, l)
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct net_rpmsg_drv_cookie_s
{
FAR struct net_rpmsg_header_s *header;
sem_t sem;
};
/* net_rpmsg_drv_s encapsulates all state information for a single hardware
* interface
*/
struct net_rpmsg_drv_s
{
FAR const char *cpuname;
FAR const char *devname;
struct rpmsg_endpoint ept;
struct work_s pollwork; /* For deferring poll work to the work queue */
/* This holds the information visible to the NuttX network */
struct net_driver_s dev; /* Interface understood by the network */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Common TX logic */
static int net_rpmsg_drv_transmit(FAR struct net_driver_s *dev,
bool nocopy);
static int net_rpmsg_drv_txpoll(FAR struct net_driver_s *dev);
static void net_rpmsg_drv_reply(FAR struct net_driver_s *dev);
/* RPMSG related functions */
static int net_rpmsg_drv_default_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static int net_rpmsg_drv_sockioctl_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static int net_rpmsg_drv_transfer_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static void net_rpmsg_drv_device_created(FAR struct rpmsg_device *rdev,
FAR void *priv_);
static void net_rpmsg_drv_device_destroy(FAR struct rpmsg_device *rdev,
FAR void *priv_);
static int net_rpmsg_drv_ept_cb(FAR struct rpmsg_endpoint *ept, void *data,
size_t len, uint32_t src, FAR void *priv);
static int net_rpmsg_drv_send_recv(struct net_driver_s *dev,
void *header_, uint32_t command, int len);
/* NuttX callback functions */
static int net_rpmsg_drv_ifup(FAR struct net_driver_s *dev);
static int net_rpmsg_drv_ifdown(FAR struct net_driver_s *dev);
static void net_rpmsg_drv_txavail_work(FAR void *arg);
static int net_rpmsg_drv_txavail(FAR struct net_driver_s *dev);
#if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6)
static int net_rpmsg_drv_addmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac);
#ifdef CONFIG_NET_IGMP
static int net_rpmsg_drv_rmmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac);
#endif
#endif
#ifdef CONFIG_NETDEV_IOCTL
static int net_rpmsg_drv_ioctl(FAR struct net_driver_s *dev, int cmd,
unsigned long arg);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static const rpmsg_ept_cb g_net_rpmsg_drv_handler[] =
{
[NET_RPMSG_IFUP] = net_rpmsg_drv_default_handler,
[NET_RPMSG_IFDOWN] = net_rpmsg_drv_default_handler,
[NET_RPMSG_ADDMCAST] = net_rpmsg_drv_default_handler,
[NET_RPMSG_RMMCAST] = net_rpmsg_drv_default_handler,
[NET_RPMSG_DEVIOCTL] = net_rpmsg_drv_default_handler,
[NET_RPMSG_SOCKIOCTL] = net_rpmsg_drv_sockioctl_handler,
[NET_RPMSG_TRANSFER] = net_rpmsg_drv_transfer_handler,
};
/****************************************************************************
* Private Functions
****************************************************************************/
static void net_rpmsg_drv_wait(FAR sem_t *sem)
{
net_sem_wait_uninterruptible(sem);
}
/****************************************************************************
* Name: net_rpmsg_drv_transmit
*
* Description:
* Start hardware transmission. Called from watchdog based polling.
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int net_rpmsg_drv_transmit(FAR struct net_driver_s *dev, bool nocopy)
{
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
FAR struct net_rpmsg_transfer_s *msg;
int ret;
/* Verify that the hardware is ready to send another packet. If we get
* here, then we are committed to sending a packet; Higher level logic
* must have assured that there is no transmission in progress.
*/
/* Increment statistics */
net_rpmsg_drv_dumppacket("transmit", dev->d_buf, dev->d_len);
NETDEV_TXPACKETS(dev);
/* Send the packet: address=dev->d_buf, length=dev->d_len */
msg = (FAR struct net_rpmsg_transfer_s *)dev->d_buf - 1;
msg->header.command = NET_RPMSG_TRANSFER;
msg->header.result = 0;
msg->header.cookie = 0;
msg->length = dev->d_len;
if (nocopy)
{
ret = rpmsg_send_nocopy(&priv->ept, msg, sizeof(*msg) + msg->length);
}
else
{
ret = rpmsg_send(&priv->ept, msg, sizeof(*msg) + msg->length);
}
if (ret < 0)
{
if (nocopy)
{
rpmsg_release_tx_buffer(&priv->ept, msg);
}
NETDEV_TXERRORS(dev);
return ret;
}
else
{
NETDEV_TXDONE(dev);
return OK;
}
}
/****************************************************************************
* Name: net_rpmsg_drv_txpoll
*
* Description:
* The transmitter is available, check if the network has any outgoing
* packets ready to send. This is a callback from devif_poll().
* devif_poll() may be called:
*
* 1. When the preceding TX packet send is complete,
* 2. When the preceding TX packet send fail
* 3. During normal TX polling
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int net_rpmsg_drv_txpoll(FAR struct net_driver_s *dev)
{
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
uint32_t size;
/* Send the packet */
net_rpmsg_drv_transmit(dev, true);
/* Check if there is room in the device to hold another packet. If
* not, return a non-zero value to terminate the poll.
*/
dev->d_buf = rpmsg_get_tx_payload_buffer(&priv->ept, &size, false);
if (dev->d_buf)
{
dev->d_buf += sizeof(struct net_rpmsg_transfer_s);
dev->d_pktsize = size - sizeof(struct net_rpmsg_transfer_s);
}
return dev->d_buf == NULL;
}
/****************************************************************************
* Name: net_rpmsg_drv_reply
*
* Description:
* After a packet has been received and dispatched to the network, it
* may return with an outgoing packet. This function checks for
* that case and performs the transmission if necessary.
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static void net_rpmsg_drv_reply(FAR struct net_driver_s *dev)
{
/* If the packet dispatch resulted in data that should be sent out on the
* network, the field d_len will set to a value > 0.
*/
if (dev->d_len > 0)
{
/* And send the packet */
net_rpmsg_drv_transmit(dev, false);
}
}
/* RPMSG related functions */
static int net_rpmsg_drv_default_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct net_rpmsg_header_s *header = data;
FAR struct net_rpmsg_drv_cookie_s *cookie =
(struct net_rpmsg_drv_cookie_s *)(uintptr_t)header->cookie;
memcpy(cookie->header, header, len);
nxsem_post(&cookie->sem);
return 0;
}
static int net_rpmsg_drv_sockioctl_task(int argc, FAR char *argv[])
{
FAR struct net_rpmsg_ioctl_s *msg;
FAR struct rpmsg_endpoint *ept;
struct socket sock;
int domain = NET_SOCK_FAMILY;
int type = NET_SOCK_TYPE;
int protocol = NET_SOCK_PROTOCOL;
/* Restore pointers from argv */
ept = (FAR struct rpmsg_endpoint *)strtoul(argv[1], NULL, 16);
msg = (FAR struct net_rpmsg_ioctl_s *)strtoul(argv[2], NULL, 16);
/* We need a temporary sock for ioctl here */
if (msg->code == SIOCIFAUTOCONF)
{
domain = PF_INET6;
type = SOCK_DGRAM;
protocol = IPPROTO_ICMP6;
}
msg->header.result = psock_socket(domain, type, protocol, &sock);
if (msg->header.result >= 0)
{
msg->header.result = psock_ioctl(&sock, msg->code,
(unsigned long)msg->arg);
psock_close(&sock); /* Close the temporary sock */
}
/* Send the response only when cookie doesn't equal NULL */
if (msg->header.cookie)
{
rpmsg_send(ept, msg, sizeof(*msg) + msg->length);
}
rpmsg_release_rx_buffer(ept, msg);
return 0;
}
static int net_rpmsg_drv_sockioctl_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR char *argv[3];
char arg1[16];
char arg2[16];
/* Save pointers into argv */
snprintf(arg1, sizeof(arg1), "%p", ept);
snprintf(arg2, sizeof(arg2), "%p", data);
argv[0] = arg1;
argv[1] = arg2;
argv[2] = NULL;
/* Move the action into a temp thread to avoid the deadlock */
rpmsg_hold_rx_buffer(ept, data);
kthread_create("rpmsg-net", CONFIG_NET_RPMSG_PRIORITY,
CONFIG_NET_RPMSG_STACKSIZE, net_rpmsg_drv_sockioctl_task, argv);
return 0;
}
#ifdef CONFIG_NET_IPv4
static bool net_rpmsg_drv_is_ipv4(FAR struct net_driver_s *dev)
{
FAR struct ipv4_hdr_s *ip =
(FAR struct ipv4_hdr_s *)(dev->d_buf + dev->d_llhdrlen);
FAR struct eth_hdr_s *eth = (FAR struct eth_hdr_s *)dev->d_buf;
if (dev->d_lltype == NET_LL_ETHERNET || dev->d_lltype == NET_LL_IEEE80211)
{
return eth->type == HTONS(ETHTYPE_IP);
}
else
{
return (ip->vhl & IP_VERSION_MASK) == IPv4_VERSION;
}
}
#endif
#ifdef CONFIG_NET_IPv6
static bool net_rpmsg_drv_is_ipv6(FAR struct net_driver_s *dev)
{
FAR struct ipv6_hdr_s *ip =
(FAR struct ipv6_hdr_s *)(dev->d_buf + dev->d_llhdrlen);
FAR struct eth_hdr_s *eth = (FAR struct eth_hdr_s *)dev->d_buf;
if (dev->d_lltype == NET_LL_ETHERNET || dev->d_lltype == NET_LL_IEEE80211)
{
return eth->type == HTONS(ETHTYPE_IP6);
}
else
{
return (ip->vtc & IP_VERSION_MASK) == IPv6_VERSION;
}
}
#endif
#ifdef CONFIG_NET_ARP
static bool net_rpmsg_drv_is_arp(FAR struct net_driver_s *dev)
{
FAR struct eth_hdr_s *eth = (FAR struct eth_hdr_s *)dev->d_buf;
if (dev->d_lltype == NET_LL_ETHERNET || dev->d_lltype == NET_LL_IEEE80211)
{
return eth->type == HTONS(ETHTYPE_ARP);
}
else
{
return false;
}
}
#endif
/****************************************************************************
* Name: net_rpmsg_drv_transfer_handler
*
* Description:
* An message was received indicating the availability of a new RX packet
*
* Parameters:
* ept - Reference to the endpoint which receive the message
*
* Returned Value:
* OK on success
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int net_rpmsg_drv_transfer_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct net_driver_s *dev = ept->priv;
FAR struct net_rpmsg_transfer_s *msg = data;
FAR void *oldbuf;
/* Lock the network and serialize driver operations if necessary.
* NOTE: Serialization is only required in the case where the driver work
* is performed on an LP worker thread and where more than one LP worker
* thread has been configured.
*/
net_lock();
/* Check for errors and update statistics */
net_rpmsg_drv_dumppacket("receive", msg->data, msg->length);
NETDEV_RXPACKETS(dev);
/* Copy the data from the hardware to dev->d_buf. Set
* amount of data in dev->d_len
*/
oldbuf = dev->d_buf;
dev->d_buf = msg->data;
dev->d_len = msg->length;
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the tap */
pkt_input(dev);
#endif
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv4
if (net_rpmsg_drv_is_ipv4(dev))
{
ninfo("IPv4 frame\n");
NETDEV_RXIPV4(dev);
/* Receive an IPv4 packet from the network device */
ipv4_input(dev);
/* Check for a reply to the IPv4 packet */
net_rpmsg_drv_reply(dev);
}
else
#endif
#ifdef CONFIG_NET_IPv6
if (net_rpmsg_drv_is_ipv6(dev))
{
ninfo("IPv6 frame\n");
NETDEV_RXIPV6(dev);
/* Dispatch IPv6 packet to the network layer */
ipv6_input(dev);
/* Check for a reply to the IPv6 packet */
net_rpmsg_drv_reply(dev);
}
else
#endif
#ifdef CONFIG_NET_ARP
if (net_rpmsg_drv_is_arp(dev))
{
ninfo("ARP frame\n");
NETDEV_RXARP(dev);
/* Dispatch ARP packet to the network layer */
arp_input(dev);
/* Check for a reply to the ARP packet */
net_rpmsg_drv_reply(dev);
}
else
#endif
{
NETDEV_RXDROPPED(dev);
}
dev->d_buf = oldbuf;
net_unlock();
return 0;
}
static void net_rpmsg_drv_device_created(FAR struct rpmsg_device *rdev,
FAR void *priv_)
{
FAR struct net_driver_s *dev = priv_;
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
char eptname[RPMSG_NAME_SIZE];
if (!strcmp(priv->cpuname, rpmsg_get_cpuname(rdev)))
{
priv->ept.priv = dev;
snprintf(eptname, sizeof(eptname),
NET_RPMSG_EPT_NAME, priv->devname);
rpmsg_create_ept(&priv->ept, rdev, eptname,
RPMSG_ADDR_ANY, RPMSG_ADDR_ANY,
net_rpmsg_drv_ept_cb, NULL);
}
}
static void net_rpmsg_drv_device_destroy(FAR struct rpmsg_device *rdev,
FAR void *priv_)
{
FAR struct net_driver_s *dev = priv_;
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
if (!strcmp(priv->cpuname, rpmsg_get_cpuname(rdev)))
{
rpmsg_destroy_ept(&priv->ept);
dev->d_buf = NULL;
}
}
static int net_rpmsg_drv_ept_cb(FAR struct rpmsg_endpoint *ept, void *data,
size_t len, uint32_t src, FAR void *priv)
{
FAR struct net_rpmsg_header_s *header = data;
uint32_t command = header->command;
if (command < sizeof(g_net_rpmsg_drv_handler) /
sizeof(g_net_rpmsg_drv_handler[0]))
{
return g_net_rpmsg_drv_handler[command](ept, data, len, src, priv);
}
return -EINVAL;
}
static int net_rpmsg_drv_send_recv(FAR struct net_driver_s *dev,
FAR void *header_, uint32_t command,
int len)
{
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
FAR struct net_rpmsg_header_s *header = header_;
FAR struct net_rpmsg_drv_cookie_s cookie;
int ret;
nxsem_init(&cookie.sem, 0, 0);
cookie.header = header;
header->command = command;
header->result = -ENXIO;
header->cookie = (uintptr_t)&cookie;
ret = rpmsg_send(&priv->ept, header, len);
if (ret < 0)
{
goto out;
}
net_rpmsg_drv_wait(&cookie.sem);
ret = cookie.header->result;
out:
nxsem_destroy(&cookie.sem);
return ret;
}
/****************************************************************************
* Name: net_rpmsg_drv_ifup
*
* Description:
* NuttX Callback: Bring up the link interface when an IP address is
* provided
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int net_rpmsg_drv_ifup(FAR struct net_driver_s *dev)
{
struct net_rpmsg_ifup_s msg =
{
};
int ret;
#ifdef CONFIG_NET_IPv4
ninfo("Bringing up: %u.%u.%u.%u\n",
ip4_addr1(dev->d_ipaddr), ip4_addr2(dev->d_ipaddr),
ip4_addr3(dev->d_ipaddr), ip4_addr4(dev->d_ipaddr));
#endif
#ifdef CONFIG_NET_IPv6
ninfo("Bringing up: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
dev->d_ipv6addr[0], dev->d_ipv6addr[1], dev->d_ipv6addr[2],
dev->d_ipv6addr[3], dev->d_ipv6addr[4], dev->d_ipv6addr[5],
dev->d_ipv6addr[6], dev->d_ipv6addr[7]);
#endif
net_lock();
/* Prepare the message */
msg.lnkaddr.length = netdev_lladdrsize(dev);
memcpy(msg.lnkaddr.addr, &dev->d_mac, msg.lnkaddr.length);
#ifdef CONFIG_NET_IPv4
net_ipv4addr_copy(msg.ipaddr, dev->d_ipaddr);
net_ipv4addr_copy(msg.draddr, dev->d_draddr);
net_ipv4addr_copy(msg.netmask, dev->d_netmask);
#endif
#ifdef CONFIG_NET_IPv6
net_ipv6addr_copy(msg.ipv6addr, dev->d_ipv6addr);
net_ipv6addr_copy(msg.ipv6draddr, dev->d_ipv6draddr);
net_ipv6addr_copy(msg.ipv6netmask, dev->d_ipv6netmask);
#endif
/* Send the message */
ret = net_rpmsg_drv_send_recv(dev, &msg, NET_RPMSG_IFUP, sizeof(msg));
if (ret < 0)
{
net_unlock();
return ret;
}
/* Update net_driver_t field */
memcpy(&dev->d_mac, msg.lnkaddr.addr, msg.lnkaddr.length);
#ifdef CONFIG_NET_IPv4
net_ipv4addr_copy(dev->d_ipaddr, msg.ipaddr);
net_ipv4addr_copy(dev->d_draddr, msg.draddr);
net_ipv4addr_copy(dev->d_netmask, msg.netmask);
#endif
#ifdef CONFIG_NET_IPv6
net_ipv6addr_copy(dev->d_ipv6addr, msg.ipv6addr);
net_ipv6addr_copy(dev->d_ipv6draddr, msg.ipv6draddr);
net_ipv6addr_copy(dev->d_ipv6netmask, msg.ipv6netmask);
#endif
net_unlock();
#ifdef CONFIG_NETDB_DNSCLIENT
# ifdef CONFIG_NET_IPv4
if (!net_ipv4addr_cmp(msg.dnsaddr, INADDR_ANY))
{
struct sockaddr_in dnsaddr =
{
};
dnsaddr.sin_family = AF_INET;
dnsaddr.sin_port = HTONS(DNS_DEFAULT_PORT);
memcpy(&dnsaddr.sin_addr, &msg.dnsaddr, sizeof(msg.dnsaddr));
dns_add_nameserver((FAR const struct sockaddr *)&dnsaddr,
sizeof(dnsaddr));
}
# endif
# ifdef CONFIG_NET_IPv6
if (!net_ipv6addr_cmp(msg.ipv6dnsaddr, &in6addr_any))
{
struct sockaddr_in6 dnsaddr =
{
};
dnsaddr.sin6_family = AF_INET6;
dnsaddr.sin6_port = HTONS(DNS_DEFAULT_PORT);
memcpy(&dnsaddr.sin6_addr, msg.ipv6dnsaddr, sizeof(msg.ipv6dnsaddr));
dns_add_nameserver((FAR const struct sockaddr *)&dnsaddr,
sizeof(dnsaddr));
}
# endif
#endif
return OK;
}
/****************************************************************************
* Name: net_rpmsg_drv_ifdown
*
* Description:
* NuttX Callback: Stop the interface.
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int net_rpmsg_drv_ifdown(FAR struct net_driver_s *dev)
{
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
FAR struct net_rpmsg_ifdown_s msg;
irqstate_t flags;
/* Disable the interrupt */
flags = enter_critical_section();
work_cancel(LPWORK, &priv->pollwork);
leave_critical_section(flags);
/* Put the EMAC in its reset, non-operational state. This should be
* a known configuration that will guarantee the net_rpmsg_drv_ifup()
* always successfully brings the interface back up.
*/
return net_rpmsg_drv_send_recv(dev, &msg, NET_RPMSG_IFDOWN, sizeof(msg));
}
/****************************************************************************
* Name: net_rpmsg_drv_txavail_work
*
* Description:
* Perform an out-of-cycle poll on the worker thread.
*
* Parameters:
* arg - Reference to the NuttX driver state structure (cast to void*)
*
* Returned Value:
* None
*
* Assumptions:
* Runs on a work queue thread.
*
****************************************************************************/
static void net_rpmsg_drv_txavail_work(FAR void *arg)
{
FAR struct net_driver_s *dev = arg;
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
uint32_t size;
/* Lock the network and serialize driver operations if necessary.
* NOTE: Serialization is only required in the case where the driver work
* is performed on an LP worker thread and where more than one LP worker
* thread has been configured.
*/
net_lock();
/* Ignore the notification if the interface is not yet up */
if (IFF_IS_UP(dev->d_flags))
{
/* Try to get the payload buffer if not yet */
if (dev->d_buf == NULL)
{
dev->d_buf = rpmsg_get_tx_payload_buffer(&priv->ept, &size, false);
if (dev->d_buf)
{
dev->d_buf += sizeof(struct net_rpmsg_transfer_s);
dev->d_pktsize = size - sizeof(struct net_rpmsg_transfer_s);
}
}
/* Check if there is room in the hardware to hold another outgoing
* packet.
*/
if (dev->d_buf)
{
/* If so, then poll the network for new XMIT data */
devif_poll(dev, net_rpmsg_drv_txpoll);
}
}
net_unlock();
}
/****************************************************************************
* Name: net_rpmsg_drv_txavail
*
* Description:
* Driver callback invoked when new TX data is available. This is a
* stimulus perform an out-of-cycle poll and, thereby, reduce the TX
* latency.
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int net_rpmsg_drv_txavail(FAR struct net_driver_s *dev)
{
FAR struct net_rpmsg_drv_s *priv = dev->d_private;
/* Is our single work structure available? It may not be if there are
* pending interrupt actions and we will have to ignore the Tx
* availability action.
*/
if (work_available(&priv->pollwork))
{
/* Schedule to serialize the poll on the worker thread. */
work_queue(LPWORK, &priv->pollwork, net_rpmsg_drv_txavail_work,
dev, 0);
}
return OK;
}
/****************************************************************************
* Name: net_rpmsg_drv_addmac
*
* Description:
* NuttX Callback: Add the specified MAC address to the hardware multicast
* address filtering
*
* Parameters:
* dev - Reference to the NuttX driver state structure
* mac - The MAC address to be added
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
#if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6)
static int net_rpmsg_drv_addmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac)
{
struct net_rpmsg_mcast_s msg;
/* Add the MAC address to the hardware multicast routing table */
msg.lnkaddr.length = netdev_lladdrsize(dev);
memcpy(msg.lnkaddr.addr, mac, msg.lnkaddr.length);
return net_rpmsg_drv_send_recv(dev, &msg, NET_RPMSG_ADDMCAST, sizeof(msg));
}
#endif
/****************************************************************************
* Name: net_rpmsg_drv_rmmac
*
* Description:
* NuttX Callback: Remove the specified MAC address from the hardware
* multicast address filtering
*
* Parameters:
* dev - Reference to the NuttX driver state structure
* mac - The MAC address to be removed
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_NET_IGMP
static int net_rpmsg_drv_rmmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac)
{
struct net_rpmsg_mcast_s msg;
/* Remove the MAC address from the hardware multicast routing table */
msg.lnkaddr.length = netdev_lladdrsize(dev);
memcpy(msg.lnkaddr.addr, mac, msg.lnkaddr.length);
return net_rpmsg_drv_send_recv(dev, &msg, NET_RPMSG_RMMCAST, sizeof(msg));
}
#endif
/****************************************************************************
* Name: net_rpmsg_drv_ioctl
*
* Description:
* Handle network IOCTL commands directed to this device.
*
* Parameters:
* dev - Reference to the NuttX driver state structure
* cmd - The IOCTL command
* arg - The argument for the IOCTL command
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
#ifdef CONFIG_NETDEV_IOCTL
static int net_rpmsg_drv_ioctl(FAR struct net_driver_s *dev, int cmd,
unsigned long arg)
{
ssize_t len;
int ret;
len = net_ioctl_arglen(PF_RPMSG, cmd);
if (len >= 0)
{
FAR struct net_rpmsg_ioctl_s *msg;
char buf[sizeof(*msg) + len];
msg = (FAR struct net_rpmsg_ioctl_s *)buf;
msg->code = cmd;
msg->length = len;
memcpy(msg->arg, (FAR void *)arg, len);
ret = net_rpmsg_drv_send_recv(dev, msg,
NET_RPMSG_DEVIOCTL, sizeof(*msg) + len);
if (ret >= 0)
{
memcpy((FAR void *)arg, msg->arg, len);
}
}
else
{
ret = len;
}
return ret;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: net_rpmsg_drv_init
*
* Description:
* Initialize the net rpmsg driver
*
* Parameters:
* name - Specify the netdev name
* lltype - Identify the link type
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
* Called early in initialization before multi-tasking is initiated.
*
****************************************************************************/
int net_rpmsg_drv_init(FAR const char *cpuname,
FAR const char *devname,
enum net_lltype_e lltype)
{
FAR struct net_rpmsg_drv_s *priv;
FAR struct net_driver_s *dev;
int ret;
/* Allocate the interface structure */
priv = kmm_zalloc(sizeof(*priv));
if (priv == NULL)
{
return -ENOMEM;
}
dev = &priv->dev;
priv->cpuname = cpuname;
priv->devname = devname;
/* Initialize the driver structure */
strlcpy(dev->d_ifname, devname, sizeof(dev->d_ifname));
dev->d_ifup = net_rpmsg_drv_ifup; /* I/F up (new IP address) callback */
dev->d_ifdown = net_rpmsg_drv_ifdown; /* I/F down callback */
dev->d_txavail = net_rpmsg_drv_txavail; /* New TX data callback */
#ifdef CONFIG_NET_IGMP
dev->d_addmac = net_rpmsg_drv_addmac; /* Add multicast MAC address */
dev->d_rmmac = net_rpmsg_drv_rmmac; /* Remove multicast MAC address */
#endif
#ifdef CONFIG_NETDEV_IOCTL
dev->d_ioctl = net_rpmsg_drv_ioctl; /* Handle network IOCTL commands */
#endif
dev->d_private = priv; /* Used to recover private state from dev */
/* Register the device with the openamp */
ret = rpmsg_register_callback(dev,
net_rpmsg_drv_device_created,
net_rpmsg_drv_device_destroy,
NULL,
NULL);
if (ret < 0)
{
kmm_free(priv);
return ret;
}
/* Register the device with the OS so that socket IOCTLs can be performed */
ret = netdev_register(dev, lltype);
if (ret < 0)
{
rpmsg_unregister_callback(dev,
net_rpmsg_drv_device_created,
net_rpmsg_drv_device_destroy,
NULL,
NULL);
kmm_free(priv);
}
return ret;
}
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