esp.c: consolidate DMA and PDMA logic in DATA OUT phase
This allows the removal of duplicate logic shared between the two implementations.
Note that we restrict esp_raise_drq() to PDMA to help reduce the log verbosity
for normal DMA.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Helge Deller <deller@gmx.de>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20240112125420.514425-79-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index d63039a..394774c 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -521,40 +521,29 @@
if (len > s->async_len) {
len = s->async_len;
}
+
if (s->dma_memory_read) {
s->dma_memory_read(s->dma_opaque, s->async_buf, len);
-
esp_set_tc(s, esp_get_tc(s) - len);
- s->async_buf += len;
- s->async_len -= len;
- s->ti_size += len;
-
- if (s->async_len == 0 && fifo8_num_used(&s->fifo) < 2) {
- /* Defer until the scsi layer has completed */
- scsi_req_continue(s->current_req);
- return;
- }
-
- esp_dma_ti_check(s);
} else {
/* Copy FIFO data to device */
len = MIN(s->async_len, ESP_FIFO_SZ);
len = MIN(len, fifo8_num_used(&s->fifo));
- n = esp_fifo_pop_buf(&s->fifo, s->async_buf, len);
- s->async_buf += n;
- s->async_len -= n;
- s->ti_size += n;
-
+ len = esp_fifo_pop_buf(&s->fifo, s->async_buf, len);
esp_raise_drq(s);
-
- if (s->async_len == 0 && fifo8_num_used(&s->fifo) < 2) {
- /* Defer until the scsi layer has completed */
- scsi_req_continue(s->current_req);
- return;
- }
-
- esp_dma_ti_check(s);
}
+
+ s->async_buf += len;
+ s->async_len -= len;
+ s->ti_size += len;
+
+ if (s->async_len == 0 && fifo8_num_used(&s->fifo) < 2) {
+ /* Defer until the scsi layer has completed */
+ scsi_req_continue(s->current_req);
+ return;
+ }
+
+ esp_dma_ti_check(s);
break;
case STAT_DI:
