void ieee802154_xmit_worker(struct work_struct *work)
{
struct ieee802154_local *local =
container_of(work, struct ieee802154_local, tx_work);
struct sk_buff *skb = local->tx_skb;
struct net_device *dev = skb->dev;
int res;
rtnl_lock();
/* check if ifdown occurred while schedule */
if (!netif_running(dev))
goto err_tx;
res = drv_xmit_sync(local, skb);
if (res)
goto err_tx;
ieee802154_xmit_complete(&local->hw, skb, false);
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
rtnl_unlock();
return;
err_tx:
/* Restart the netif queue on each sub_if_data object. */
ieee802154_wake_queue(&local->hw);
rtnl_unlock();
kfree_skb(skb);
netdev_dbg(dev, "transmission failed\n");
}
static void
at86rf230_async_error_recover(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON, NULL, false);
ieee802154_wake_queue(lp->hw);
}
static void
at86rf230_async_error_recover_complete(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
if (ctx->free)
kfree(ctx);
ieee802154_wake_queue(lp->hw);
}
static int ieee802154_resume(struct wpan_phy *wpan_phy)
{
struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
int ret;
/* nothing to do if HW shouldn't run */
if (!local->open_count)
goto wake_up;
/* restart hardware */
ret = drv_start(local);
if (ret)
return ret;
wake_up:
ieee802154_wake_queue(&local->hw);
local->suspended = false;
return 0;
}
static void atusb_tx_done(struct atusb *atusb, uint8_t seq)
{
struct usb_device *usb_dev = atusb->usb_dev;
uint8_t expect = atusb->tx_ack_seq;
dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect);
if (seq == expect) {
/* TODO check for ifs handling in firmware */
ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false);
} else {
/* TODO I experience this case when atusb has a tx complete
* irq before probing, we should fix the firmware it's an
* unlikely case now that seq == expect is then true, but can
* happen and fail with a tx_skb = NULL;
*/
ieee802154_wake_queue(atusb->hw);
if (atusb->tx_skb)
dev_kfree_skb_irq(atusb->tx_skb);
}
}
static netdev_tx_t
ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
int ret;
if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
u16 crc = crc_ccitt(0, skb->data, skb->len);
put_unaligned_le16(crc, skb_put(skb, 2));
}
if (skb_cow_head(skb, local->hw.extra_tx_headroom))
goto err_tx;
/* Stop the netif queue on each sub_if_data object. */
ieee802154_stop_queue(&local->hw);
/* async is priority, otherwise sync is fallback */
if (local->ops->xmit_async) {
ret = drv_xmit_async(local, skb);
if (ret) {
ieee802154_wake_queue(&local->hw);
goto err_tx;
}
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
} else {
local->tx_skb = skb;
queue_work(local->workqueue, &local->tx_work);
}
return NETDEV_TX_OK;
err_tx:
kfree_skb(skb);
return NETDEV_TX_OK;
}