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esp.c: decrement the TC during MESSAGE OUT and COMMAND phases

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This is to ensure that STAT_TC is triggered during the right parts of the
transfer when it is controlled exclusively by the TC.

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: <20240112125420.514425-14-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland 2024-01-12 12:53:05 +00:00
parent 2572689bc8
commit a034765161
1 changed files with 2 additions and 0 deletions
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2
hw/scsi/esp.c
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@ -259,6 +259,7 @@ static uint32_t get_cmd(ESPState *s, uint32_t maxlen)
s->dma_memory_read(s->dma_opaque, buf, dmalen);
dmalen = MIN(fifo8_num_free(&s->cmdfifo), dmalen);
fifo8_push_all(&s->cmdfifo, buf, dmalen);
esp_set_tc(s, esp_get_tc(s) - dmalen);
} else {
return 0;
}
@ -657,6 +658,7 @@ static void esp_do_dma(ESPState *s)
len = MIN(len, fifo8_num_free(&s->cmdfifo));
s->dma_memory_read(s->dma_opaque, buf, len);
fifo8_push_all(&s->cmdfifo, buf, len);
esp_set_tc(s, esp_get_tc(s) - len);
} else {
esp_set_pdma_cb(s, DO_DMA_PDMA_CB);
esp_raise_drq(s);