static int e1000_txavail(struct net_driver_s *dev)
{
struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
int tail = e1000->tx_ring.tail;
irqstate_t flags;
/* Disable interrupts because this function may be called from interrupt
* level processing.
*/
flags = irqsave();
/* Ignore the notification if the interface is not yet up */
if (e1000->bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
if (e1000->tx_ring.desc[tail].desc_status)
{
(void)devif_poll(&e1000->netdev, e1000_txpoll);
}
}
irqrestore(flags);
return OK;
}
static void bcmf_txavail_work(FAR void *arg)
{
FAR struct bcmf_dev_s *priv = (FAR struct bcmf_dev_s *)arg;
// wlinfo("Entry\n");
/* 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 (priv->bc_bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
if (bcmf_netdev_alloc_tx_frame(priv))
{
goto exit_unlock;
}
/* If so, then poll the network for new XMIT data */
priv->bc_dev.d_buf = priv->cur_tx_frame->data;
priv->bc_dev.d_len = 0;
(void)devif_poll(&priv->bc_dev, bcmf_txpoll);
}
exit_unlock:
net_unlock();
}
static void skel_txdone(FAR struct skel_driver_s *priv)
{
/* Check for errors and update statistics */
NETDEV_TXDONE(priv->sk_dev);
/* Check if there are pending transmissions */
/* If no further transmissions are pending, then cancel the TX timeout and
* disable further Tx interrupts.
*/
wd_cancel(priv->sk_txtimeout);
/* Then make sure that the TX poll timer is running (if it is already
* running, the following would restart it). This is necessary to
* avoid certain race conditions where the polling sequence can be
* interrupted.
*/
(void)wd_start(priv->sk_txpoll, skeleton_WDDELAY, skel_poll_expiry, 1,
(wdparm_t)priv);
/* And disable further TX interrupts. */
/* In any event, poll the network for new TX data */
(void)devif_poll(&priv->sk_dev, skel_txpoll);
}
static int vnet_txavail(struct net_driver_s *dev)
{
FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
irqstate_t flags;
/* Disable interrupts because this function may be called from interrupt
* level processing.
*/
flags = enter_critical_section();
/* Ignore the notification if the interface is not yet up */
if (vnet->sk_bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
if (vnet_is_txbuff_full(vnet->vnet))
{
#ifdef CONFIG_DEBUG
cprintf("VNET: TX buffer is full\n");
#endif
goto out;
}
/* If so, then poll the network for new XMIT data */
(void)devif_poll(&vnet->sk_dev, vnet_txpoll);
}
out:
leave_critical_section(flags);
return OK;
}
static void lo_poll_work(FAR void *arg)
{
FAR struct lo_driver_s *priv = (FAR struct lo_driver_s *)arg;
net_lock_t state;
/* Perform the poll */
state = net_lock();
priv->lo_txdone = false;
(void)devif_timer(&priv->lo_dev, lo_txpoll);
/* Was something received and looped back? */
while (priv->lo_txdone)
{
/* Yes, poll again for more TX data */
priv->lo_txdone = false;
(void)devif_poll(&priv->lo_dev, lo_txpoll);
}
/* Setup the watchdog poll timer again */
(void)wd_start(priv->lo_polldog, LO_WDDELAY, lo_poll_expiry, 1, priv);
net_unlock(state);
}
static int emac_txavail(struct net_driver_s *dev)
{
FAR struct emac_driver_s *priv = (FAR struct emac_driver_s *)dev->d_private;
irqstate_t flags;
/* Disable interrupts because this function may be called from interrupt
* level processing.
*/
flags = enter_critical_section();
/* Ignore the notification if the interface is not yet up */
if (priv->d_bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
/* If so, then poll the network for new XMIT data */
(void)devif_poll(&priv->d_dev, emac_txpoll);
}
leave_critical_section(flags);
return OK;
}
static void vnet_txtimeout(int argc, uint32_t arg, ...)
{
FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)arg;
/* Poll the network for new XMIT data */
(void)devif_poll(&vnet->sk_dev, vnet_txpoll);
}
static inline void skel_txtimeout_process(FAR struct skel_driver_s *priv)
{
/* Increment statistics and dump debug info */
/* Then reset the hardware */
/* Then poll the network for new XMIT data */
(void)devif_poll(&priv->sk_dev, skel_txpoll);
}
static void emac_txtimeout(int argc, uint32_t arg, ...)
{
FAR struct emac_driver_s *priv = (FAR struct emac_driver_s *)arg;
/* Increment statistics and dump debug info */
/* Then reset the hardware */
/* Then poll the network for new XMIT data */
(void)devif_poll(&priv->d_dev, emac_txpoll);
}
static inline void skel_txavail_process(FAR struct skel_driver_s *priv)
{
/* Ignore the notification if the interface is not yet up */
if (priv->sk_bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
/* If so, then poll the network for new XMIT data */
(void)devif_poll(&priv->sk_dev, skel_txpoll);
}
}
static void emac_txdone(FAR struct emac_driver_s *priv)
{
/* Check for errors and update statistics */
/* If no further xmits are pending, then cancel the TX timeout and
* disable further Tx interrupts.
*/
wd_cancel(priv->d_txtimeout);
/* Then poll the network for new XMIT data */
(void)devif_poll(&priv->d_dev, emac_txpoll);
}
static void e1000_txtimeout(int argc, uint32_t arg, ...)
{
struct e1000_dev *e1000 = (struct e1000_dev *)arg;
/* Increment statistics and dump debug info */
/* Then reset the hardware */
e1000_init(e1000);
/* Then poll uIP for new XMIT data */
(void)devif_poll(&e1000->netdev, e1000_txpoll);
}
static void misoc_net_txtimeout_work(FAR void *arg)
{
FAR struct misoc_net_driver_s *priv = (FAR struct misoc_net_driver_s *)arg;
/* Increment statistics and dump debug info */
net_lock();
NETDEV_TXTIMEOUTS(priv->misoc_net_dev);
/* Then reset the hardware */
/* Then poll the network for new XMIT data */
(void)devif_poll(&priv->misoc_net_dev, misoc_net_txpoll);
net_unlock();
}
static void misoc_net_txavail_work(FAR void *arg)
{
FAR struct misoc_net_driver_s *priv = (FAR struct misoc_net_driver_s *)arg;
/* Ignore the notification if the interface is not yet up */
net_lock();
if (priv->misoc_net_bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
if (!ethmac_sram_reader_ready_read())
{
/* If so, then poll the network for new XMIT data */
(void)devif_poll(&priv->misoc_net_dev, misoc_net_txpoll);
}
}
net_unlock();
}
static void misoc_net_txdone(FAR struct misoc_net_driver_s *priv)
{
/* Check for errors and update statistics */
NETDEV_TXDONE(priv->misoc_net_dev);
/* Check if there are pending transmissions */
/* If no further transmissions are pending, then cancel the TX timeout and
* disable further Tx interrupts.
*/
wd_cancel(priv->misoc_net_txtimeout);
/* And disable further TX interrupts. */
ethmac_sram_reader_ev_enable_write(0);
/* In any event, poll the network for new TX data */
(void)devif_poll(&priv->misoc_net_dev, misoc_net_txpoll);
}
static void lo_txavail_work(FAR void *arg)
{
FAR struct lo_driver_s *priv = (FAR struct lo_driver_s *)arg;
net_lock_t state;
/* Ignore the notification if the interface is not yet up */
state = net_lock();
if (priv->lo_bifup)
{
do
{
/* If so, then poll the network for new XMIT data */
priv->lo_txdone = false;
(void)devif_poll(&priv->lo_dev, lo_txpoll);
}
while (priv->lo_txdone);
}
net_unlock(state);
}
void netdriver_loop(void)
{
FAR struct eth_hdr_s *eth;
/* Check for new frames. If so, then poll the network for new XMIT data */
net_lock();
(void)devif_poll(&g_sim_dev, sim_txpoll);
net_unlock();
/* netdev_read will return 0 on a timeout event and >0 on a data received event */
g_sim_dev.d_len = netdev_read((FAR unsigned char *)g_sim_dev.d_buf,
CONFIG_NET_ETH_MTU);
/* Disable preemption through to the following so that it behaves a little more
* like an interrupt (otherwise, the following logic gets pre-empted an behaves
* oddly.
*/
sched_lock();
if (g_sim_dev.d_len > 0)
{
/* Data received event. Check for valid Ethernet header with destination == our
* MAC address
*/
eth = BUF;
if (g_sim_dev.d_len > ETH_HDRLEN)
{
int is_ours;
/* Figure out if this ethernet frame is addressed to us. This affects
* what we're willing to receive. Note that in promiscuous mode, the
* up_comparemac will always return 0.
*/
is_ours = (up_comparemac(eth->dest, &g_sim_dev.d_mac.ether) == 0);
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the packet
* tap.
*/
if (is_ours)
{
pkt_input(&g_sim_dev);
}
#endif /* CONFIG_NET_PKT */
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv4
if (eth->type == HTONS(ETHTYPE_IP) && is_ours)
{
ninfo("IPv4 frame\n");
/* Handle ARP on input then give the IPv4 packet to the network
* layer
*/
arp_ipin(&g_sim_dev);
ipv4_input(&g_sim_dev);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* d_len is set to a value > 0.
*/
if (g_sim_dev.d_len > 0)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv6
if (IFF_IS_IPv4(g_sim_dev.d_flags))
#endif
{
arp_out(&g_sim_dev);
}
#ifdef CONFIG_NET_IPv6
else
{
neighbor_out(&g_sim_dev);
}
#endif
/* And send the packet */
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
if (eth->type == HTONS(ETHTYPE_IP6) && is_ours)
{
ninfo("Iv6 frame\n");
/* Give the IPv6 packet to the network layer */
ipv6_input(&g_sim_dev);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* d_len is set to a value > 0.
*/
if (g_sim_dev.d_len > 0)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv4
if (IFF_IS_IPv4(g_sim_dev.d_flags))
{
arp_out(&g_sim_dev);
}
else
#endif
#ifdef CONFIG_NET_IPv6
{
neighbor_out(&g_sim_dev);
}
#endif /* CONFIG_NET_IPv6 */
/* And send the packet */
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else
#endif/* CONFIG_NET_IPv6 */
#ifdef CONFIG_NET_ARP
if (eth->type == htons(ETHTYPE_ARP))
{
arp_arpin(&g_sim_dev);
/* If the above function invocation resulted in data that
* should be sent out on the network, the global variable
* d_len is set to a value > 0.
*/
if (g_sim_dev.d_len > 0)
{
netdev_send(g_sim_dev.d_buf, g_sim_dev.d_len);
}
}
else
#endif
{
nwarn("WARNING: Unsupported Ethernet type %u\n", eth->type);
}
}
}
/* Otherwise, it must be a timeout event */
else if (timer_expired(&g_periodic_timer))
{
timer_reset(&g_periodic_timer);
devif_timer(&g_sim_dev, sim_txpoll);
}
sched_unlock();
}
static irqreturn_t e1000_interrupt_handler(int irq, void *dev_id)
{
struct e1000_dev *e1000 = (struct e1000_dev *)dev_id;
/* Get and clear interrupt status bits */
int intr_cause = e1000_inl(e1000, E1000_ICR);
e1000_outl(e1000, E1000_ICR, intr_cause);
/* not for me */
if (intr_cause == 0)
{
return IRQ_NONE;
}
/* Handle interrupts according to status bit settings */
/* Link status change */
if (intr_cause & (1 << 2))
{
if (e1000_inl(e1000, E1000_STATUS) & 2)
{
e1000->bifup = true;
}
else
{
e1000->bifup = false;
}
}
/* Check if we received an incoming packet, if so, call skel_receive() */
/* Rx-descriptor Timer expired */
if (intr_cause & (1 << 7))
{
e1000_receive(e1000);
}
/* Tx queue empty */
if (intr_cause & (1 << 1))
{
wd_cancel(e1000->txtimeout);
}
/* Check is a packet transmission just completed. If so, call skel_txdone.
* This may disable further Tx interrupts if there are no pending
* tansmissions.
*/
/* Tx-descriptor Written back */
if (intr_cause & (1 << 0))
{
devif_poll(&e1000->netdev, e1000_txpoll);
}
/* Rx-Descriptors Low */
if (intr_cause & (1 << 4))
{
int tail;
tail = e1000->rx_ring.tail + e1000->rx_ring.free;
tail %= CONFIG_E1000_N_RX_DESC;
e1000->rx_ring.tail = tail;
e1000->rx_ring.free = 0;
e1000_outl(e1000, E1000_RDT, tail);
}
return IRQ_HANDLED;
}
static void vnet_txdone(FAR struct vnet_driver_s *vnet)
{
/* Poll the network for new XMIT data */
(void)devif_poll(&vnet->sk_dev, vnet_txpoll);
}
static void slip_txtask(int argc, FAR char *argv[])
{
FAR struct slip_driver_s *priv;
unsigned int index = *(argv[1]) - '0';
net_lock_t flags;
systime_t msec_start;
systime_t msec_now;
unsigned int hsec;
nerr("index: %d\n", index);
DEBUGASSERT(index < CONFIG_NET_SLIP_NINTERFACES);
/* Get our private data structure instance and wake up the waiting
* initialization logic.
*/
priv = &g_slip[index];
slip_semgive(priv);
/* Loop forever */
msec_start = clock_systimer() * MSEC_PER_TICK;
for (; ; )
{
/* Wait for the timeout to expire (or until we are signaled by by */
slip_semtake(priv);
if (!priv->txnodelay)
{
slip_semgive(priv);
usleep(SLIP_WDDELAY);
}
else
{
priv->txnodelay = false;
slip_semgive(priv);
}
/* Is the interface up? */
if (priv->bifup)
{
/* Get exclusive access to the network (if it it is already being used
* slip_rxtask, then we have to wait).
*/
slip_semtake(priv);
/* Poll the networking layer for new XMIT data. */
flags = net_lock();
priv->dev.d_buf = priv->txbuf;
/* Has a half second elapsed since the last timer poll? */
msec_now = clock_systimer() * MSEC_PER_TICK;
hsec = (unsigned int)(msec_now - msec_start) / (MSEC_PER_SEC / 2);
if (hsec)
{
/* Yes, perform the timer poll */
(void)devif_timer(&priv->dev, slip_txpoll);
msec_start += hsec * (MSEC_PER_SEC / 2);
}
else
{
/* No, perform the normal TX poll */
(void)devif_poll(&priv->dev, slip_txpoll);
}
net_unlock(flags);
slip_semgive(priv);
}
}
}