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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

10
hw/dma/xilinx_axidma.c
View file

@ -283,7 +283,7 @@ static void stream_process_mem2s(struct Stream *s, StreamSlave *tx_data_dev,
if (stream_desc_sof(&s->desc)) {
s->pos = 0;
stream_push(tx_control_dev, s->desc.app, sizeof(s->desc.app));
stream_push(tx_control_dev, s->desc.app, sizeof(s->desc.app), true);
}
txlen = s->desc.control & SDESC_CTRL_LEN_MASK;
@ -298,7 +298,7 @@ static void stream_process_mem2s(struct Stream *s, StreamSlave *tx_data_dev,
s->pos += txlen;
if (stream_desc_eof(&s->desc)) {
stream_push(tx_data_dev, s->txbuf, s->pos);
stream_push(tx_data_dev, s->txbuf, s->pos, true);
s->pos = 0;
stream_complete(s);
}
@ -384,7 +384,7 @@ static void xilinx_axidma_reset(DeviceState *dev)
static size_t
xilinx_axidma_control_stream_push(StreamSlave *obj, unsigned char *buf,
size_t len)
size_t len, bool eop)
{
XilinxAXIDMAStreamSlave *cs = XILINX_AXI_DMA_CONTROL_STREAM(obj);
struct Stream *s = &cs->dma->streams[1];
@ -416,12 +416,14 @@ xilinx_axidma_data_stream_can_push(StreamSlave *obj,
}
static size_t
xilinx_axidma_data_stream_push(StreamSlave *obj, unsigned char *buf, size_t len)
xilinx_axidma_data_stream_push(StreamSlave *obj, unsigned char *buf, size_t len,
bool eop)
{
XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(obj);
struct Stream *s = &ds->dma->streams[1];
size_t ret;
assert(eop);
ret = stream_process_s2mem(s, buf, len);
stream_update_irq(s);
return ret;