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esp.c: handle non-DMA FIFO writes used to terminate DMA commands 

Certain versions of MacOS send the first 5 bytes of the CDB using DMA and then
send the last byte of the CDB by writing to the FIFO. Update the non-DMA state
machine to detect the end of the CDB and execute the SCSI command using similar
logic as that which already exists for transferring the remainder of the CDB
using the ESP TI command.

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: <20240112125420.514425-75-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 12:54:06 +00:00
parent 41f157e50f
commit 8ba3204893
1 changed files with 10 additions and 0 deletions
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10
hw/scsi/esp.c
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@ -787,6 +787,16 @@ static void esp_do_nodma(ESPState *s)
}
break;
case CMD_SEL | CMD_DMA:
case CMD_SELATN | CMD_DMA:
/* Handle when DMA transfer is terminated by non-DMA FIFO write */
if (esp_cdb_length(s) && esp_cdb_length(s) ==
fifo8_num_used(&s->cmdfifo) - s->cmdfifo_cdb_offset) {
/* Command has been received */
do_cmd(s);
}
break;
case CMD_SEL:
case CMD_SELATN:
/* FIFO already contain entire CDB */