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

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>

1 files changed, 6 insertions, 4 deletions

diff --git a/hw/dma/xilinx_axidma.c b/hw/dma/xilinx_axidma.c
index 4540051..a770e12 100644
--- a/hw/dma/xilinx_axidma.c
+++ b/hw/dma/xilinx_axidma.c
@@ -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;