void host_buffer_release( wiced_buffer_t buffer, wwd_buffer_dir_t direction )
{
wiced_assert( "Error: Invalid buffer\n", buffer != NULL );
if ( direction == WWD_NETWORK_TX )
{
NX_PACKET *nx_buffer = (NX_PACKET *) buffer;
/* TCP transmit packet isn't returned immediately to the pool. The stack holds the packet temporarily
* until ACK is received. Otherwise, the same packet is used for re-transmission.
* Return prepend pointer to the original location which the stack expects (the start of IP header).
* For other packets, resetting prepend pointer isn't required.
*/
if ( nx_buffer->nx_packet_length > sizeof(wwd_buffer_header_t) + WWD_SDPCM_HEADER_TX_LENGTH + WICED_ETHERNET_SIZE )
{
if ( host_buffer_add_remove_at_front( &buffer, sizeof(wwd_buffer_header_t) + WWD_SDPCM_HEADER_TX_LENGTH + WICED_ETHERNET_SIZE ) != WWD_SUCCESS )
{
WPRINT_NETWORK_DEBUG(("Could not move packet pointer\r\n"));
}
}
if ( NX_SUCCESS != nx_packet_transmit_release( nx_buffer ) )
{
WPRINT_NETWORK_ERROR(("Could not release packet - leaking buffer\n"));
}
}
else
{
NX_PACKET *nx_buffer = (NX_PACKET *) buffer;
if ( NX_SUCCESS != nx_packet_release( nx_buffer ) )
{
WPRINT_NETWORK_ERROR(("Could not release packet - leaking buffer\n"));
}
}
}
/*@only@*//*@null@*/wwd_result_t wwd_bus_read_frame( wiced_buffer_t* buffer )
{
uint32_t intstatus;
void *p0 = NULL;
uint16_t *hwtag;
intstatus = read_intstatus();
/* Handle DMA interrupts */
if (intstatus & I_XI) {
dma_tx_reclaim();
}
if ( rxactive_dma( ) == 0 )
{
refill_dma( );
if ( rxactive_dma( ) != 0 )
{
int_enab();
}
}
/* Handle DMA errors */
if (intstatus & I_ERRORS) {
refill_dma( );
WPRINT_WWD_DEBUG(("RX errors: intstatus: 0x%x\n", (unsigned int)intstatus));
}
/* Handle DMA receive interrupt */
p0 = read_dma_packet( &hwtag );
if ( p0 == NULL)
{
if ( rxactive_dma( ) != 0 )
{
int_enab();
}
return WWD_NO_PACKET_TO_RECEIVE;
}
*buffer = p0;
host_buffer_add_remove_at_front( buffer, - (int)sizeof(wwd_buffer_header_t) );
wwd_sdpcm_update_credit((uint8_t*)hwtag);
refill_dma( );
/* where are buffers from dma_rx and dma_getnextrxp created? */
return WWD_SUCCESS;
}
/* Device data transfer functions */
wwd_result_t wwd_bus_send_buffer( wiced_buffer_t buffer )
{
host_buffer_add_remove_at_front(&buffer, sizeof(wwd_buffer_header_t));
dma_tx_data( buffer, host_buffer_get_current_piece_size( buffer ) );
return WWD_SUCCESS;
}
