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hw/core: stream: Add an end-of-packet flag

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Some stream clients stream an endless stream of data while
other clients stream data in packets. Stream interfaces
usually have a way to signal the end of a packet or the
last beat of a transfer.

This adds an end-of-packet flag to the push interface.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-Id: <20200506082513.18751-6-edgar.iglesias@gmail.com>
This commit is contained in:
Edgar E. Iglesias 2020-05-06 10:25:09 +02:00
parent e3a8926d0e
commit 51b19950ca
5 changed files with 22 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

14
hw/net/xilinx_axienet.c
View file

@ -697,14 +697,14 @@ static void axienet_eth_rx_notify(void *opaque)
axienet_eth_rx_notify, s)) {
size_t ret = stream_push(s->tx_control_dev,
(void *)s->rxapp + CONTROL_PAYLOAD_SIZE
- s->rxappsize, s->rxappsize);
- s->rxappsize, s->rxappsize, true);
s->rxappsize -= ret;
}
while (s->rxsize && stream_can_push(s->tx_data_dev,
axienet_eth_rx_notify, s)) {
size_t ret = stream_push(s->tx_data_dev, (void *)s->rxmem + s->rxpos,
s->rxsize);
s->rxsize, true);
s->rxsize -= ret;
s->rxpos += ret;
if (!s->rxsize) {
@ -874,12 +874,14 @@ static ssize_t eth_rx(NetClientState *nc, const uint8_t *buf, size_t size)
}
static size_t
xilinx_axienet_control_stream_push(StreamSlave *obj, uint8_t *buf, size_t len)
xilinx_axienet_control_stream_push(StreamSlave *obj, uint8_t *buf, size_t len,
bool eop)
{
int i;
XilinxAXIEnetStreamSlave *cs = XILINX_AXI_ENET_CONTROL_STREAM(obj);
XilinxAXIEnet *s = cs->enet;
assert(eop);
if (len != CONTROL_PAYLOAD_SIZE) {
hw_error("AXI Enet requires %d byte control stream payload\n",
(int)CONTROL_PAYLOAD_SIZE);
@ -894,11 +896,15 @@ xilinx_axienet_control_stream_push(StreamSlave *obj, uint8_t *buf, size_t len)
}
static size_t
xilinx_axienet_data_stream_push(StreamSlave *obj, uint8_t *buf, size_t size)
xilinx_axienet_data_stream_push(StreamSlave *obj, uint8_t *buf, size_t size,
bool eop)
{
XilinxAXIEnetStreamSlave *ds = XILINX_AXI_ENET_DATA_STREAM(obj);
XilinxAXIEnet *s = ds->enet;
/* We don't support fragmented packets yet. */
assert(eop);
/* TX enable ? */
if (!(s->tc & TC_TX)) {
return size;