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#include <common.h>
int
responder (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
{
memif_connection_t *c = (memif_connection_t *) private_ctx;
int err, i;
uint16_t tx;
/* receive packets from the shared memory */
err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_rx_burst: %s", memif_strerror (err));
return err;
}
do
{
/* allocate tx buffers */
err = memif_buffer_alloc (conn, qid, c->tx_bufs, c->rx_buf_num,
&c->tx_buf_num, c->buffer_size);
/* suppress full ring error MEMIF_ERR_NOBUF_RING */
if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
{
INFO ("memif_buffer_alloc: %s", memif_strerror (err));
goto error;
}
/* Process the packets */
if (c->packet_handler == NULL)
{
INFO ("Missing packet handler");
goto error;
}
err = c->packet_handler (c);
if (err != 0)
{
INFO ("packet handler error: %d", err);
goto error;
}
/* Done processing packets */
/* refill the queue */
err = memif_refill_queue (conn, qid, c->tx_buf_num, c->headroom_size);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_refill_queue: %s", memif_strerror (err));
goto error;
}
c->rx_buf_num -= c->tx_buf_num;
err = memif_tx_burst (conn, qid, c->tx_bufs, c->tx_buf_num, &tx);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_tx_burst: %s", memif_strerror (err));
goto error;
}
c->tx_buf_num -= tx;
/* This should never happen */
if (c->tx_buf_num != 0)
{
INFO ("memif_tx_burst failed to send all allocated buffers.");
goto error;
}
}
while (c->rx_buf_num > 0);
return 0;
error:
err = memif_refill_queue (conn, qid, c->rx_buf_num, c->headroom_size);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_refill_queue: %s", memif_strerror (err));
return err;
}
c->rx_buf_num = 0;
return -1;
}
int
responder_zero_copy (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
{
memif_connection_t *c = (memif_connection_t *) private_ctx;
int err, i;
uint16_t tx, tx2;
/* receive packets from the shared memory */
err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_rx_burst: %s", memif_strerror (err));
return err;
}
do
{
/* Note that in zero copy memif_buffer_alloc is not part of respond
process,
* instead rx buffers are used directly using memif_buffer_enq_tx.
* /
/* Process the packets */
if (c->packet_handler == NULL)
{
INFO ("Missing packet handler");
goto error;
}
err = c->packet_handler (c);
if (err != 0)
{
INFO ("packet handler error: %d", err);
goto error;
}
/* Done processing packets */
/* Swap rx and tx buffers, swapped tx buffers are considered allocated
* and are ready to be transmitted. Notice that the buffers are swapped
* only in memif driver and locally remain in rx_bufs queue.
*/
err = memif_buffer_enq_tx (conn, qid, c->rx_bufs, c->rx_buf_num, &tx);
/* suppress full ring error MEMIF_ERR_NOBUF_RING */
if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
{
INFO ("memif_buffer_alloc: %s", memif_strerror (err));
goto error;
}
/* refill the queue */
err = memif_refill_queue (conn, qid, tx, c->headroom_size);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_refill_queue: %s", memif_strerror (err));
goto error;
}
c->rx_buf_num -= tx;
/* Notice that we send from rx_bufs as the buffers were only swapped
* internally in memif driver */
err = memif_tx_burst (conn, qid, c->rx_bufs, tx, &tx2);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_tx_burst: %s", memif_strerror (err));
goto error;
}
tx -= tx2;
/* This should never happen */
if (tx != 0)
{
INFO ("memif_tx_burst failed to send all allocated buffers.");
goto error;
}
}
while (c->rx_buf_num > 0);
return 0;
error:
err = memif_refill_queue (conn, qid, c->rx_buf_num, c->headroom_size);
if (err != MEMIF_ERR_SUCCESS)
{
INFO ("memif_refill_queue: %s", memif_strerror (err));
return err;
}
c->rx_buf_num = 0;
return -1;
}
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