static void poll()
{
uint32_t wrap = 0;
uint32_t cur_bytes = 0;
uint32_t total_bytes = 0;
uint32_t cumulative_bytes = 0;
MUHWI_PacketHeader_t *hdr = 0;
while ((total_bytes = MUSPI_getAvailableBytes (_rfifoShadowPtr, &wrap)) != 0)
{
if (wrap == 0)
{
/* No fifo wrap. Process each packet. */
cumulative_bytes = 0;
while (cumulative_bytes < total_bytes )
{
hdr = MUSPI_getNextPacketOptimized (_rfifoShadowPtr, &cur_bytes);
/* Handle the packet by
* - marking the associated request complete
* - if this is the last request (largest), increment iteration count
*/
handlePacket(hdr);
cumulative_bytes += cur_bytes;
/* Touch head for next packet. */
}
}
else
{
/* Packets wrap around to the top of the fifo. Handle the one packet
* that wraps.
*/
hdr = MUSPI_getNextPacketWrap (_rfifoShadowPtr, &cur_bytes);
/* Handle the packet by
* - marking the associated request complete
* - if this is the last request (largest), increment iteration count
*/
handlePacket(hdr);
}
/* Store the updated fifo head. */
MUSPI_syncRecFifoHwHead (_rfifoShadowPtr);
}
}
static inline void* Forwarder_getNextPacket() {
uint32_t wrap = 0;
uint32_t cur_bytes = 0;
uint32_t b = 0;
void *clientdata = NULL;
if (likely(recFifoState.proc < recFifoState.avail)) {
clientdata = MUSPI_getNextPacketOptimized(RecFifoDma, &cur_bytes);
recFifoState.proc += cur_bytes;
if (recFifoState.proc >= recFifoState.avail)
MUSPI_syncRecFifoHwHead(RecFifoDma);
} else if ((b = MUSPI_getAvailableBytes(RecFifoDma, &wrap)) != 0) {
if (wrap == 0) {
/* No fifo wrap. Process each packet. */
recFifoState.all = b; // proc = 0, avail = b
clientdata = MUSPI_getNextPacketOptimized(RecFifoDma, &cur_bytes);
recFifoState.proc += cur_bytes;
if (recFifoState.proc >= recFifoState.avail)
MUSPI_syncRecFifoHwHead(RecFifoDma);
} else {
/* Packets wrap around to the top of the fifo. Handle the one packet
* that wraps.
*/
clientdata = MUSPI_getNextPacketWrap(RecFifoDma, &cur_bytes);
/* Store the updated fifo head. */
MUSPI_syncRecFifoHwHead(RecFifoDma);
recFifoState.all = 0; // proc = 0, avail = 0
}
}
return clientdata;
}