/**
@brief function for the @b send method in a link_device instance
@param ld the pointer to a link_device instance
@param iod the pointer to an io_device instance
@param skb the pointer to an skb that will be transmitted
@retval "> 0" the length of data transmitted if there is NO ERROR
@retval "< 0" an error code
*/
static int mem_send(struct link_device *ld, struct io_device *iod,
struct sk_buff *skb)
{
struct mem_link_device *mld = to_mem_link_device(ld);
struct modem_ctl *mc = ld->mc;
enum dev_format id = iod->format;
u8 ch = iod->id;
switch (id) {
case IPC_FMT:
case IPC_RAW:
case IPC_RFS:
if (likely(sipc5_ipc_ch(ch))) {
if (unlikely(!ipc_active(mld)))
return -EIO;
if (iod->sbd_ipc) {
if (likely(sbd_active(&mld->sbd_link_dev)))
return xmit_ipc_to_rb(mld, ch, skb);
else
return -ENODEV;
} else {
BUG_ON(1);
}
} else {
return xmit_udl(mld, iod, ch, skb);
}
break;
case IPC_BOOT:
case IPC_DUMP:
if (sipc5_udl_ch(ch))
return xmit_udl(mld, iod, ch, skb);
break;
default:
break;
}
mif_err("%s:%s->%s: ERR! Invalid IO device (format:%s id:%d)\n",
ld->name, iod->name, mc->name, dev_str(id), ch);
return -ENODEV;
}
static int xmit_ipc(struct mem_link_device *mld, struct io_device *iod,
enum sipc_ch_id ch, struct sk_buff *skb)
{
if (unlikely(!ipc_active(mld)))
return -EIO;
#ifdef CONFIG_LINK_DEVICE_WITH_SBD_ARCH
if (iod->sbd_ipc) {
if (likely(sbd_active(&mld->sbd_link_dev)))
return xmit_ipc_to_rb(mld, ch, skb);
else
return -ENODEV;
} else {
return xmit_ipc_to_dev(mld, ch, skb);
}
#else
return xmit_ipc_to_dev(mld, ch, skb);
#endif
}