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esp.c: separate logic based upon ESP command in esp_transfer_data() 

The handling of the INTR_FC and INTR_BS bits is different depending upon the
last command executed by the ESP. Note that currently INTR_FC is managed
elsewhere, but that will change soon.

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: <20240112125420.514425-60-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 12:53:51 +00:00
parent 8bb2249585
commit a4608fa0a5
1 changed files with 26 additions and 6 deletions
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32
hw/scsi/esp.c
View File

@ -862,13 +862,33 @@ void esp_transfer_data(SCSIRequest *req, uint32_t len)
s->async_buf = scsi_req_get_buf(req);
if (!to_device && !s->data_ready) {
/*
* Initial incoming data xfer is complete so raise command
* completion interrupt
*/
s->data_ready = true;
s->rregs[ESP_RINTR] |= INTR_BS;
esp_raise_irq(s);
switch (s->rregs[ESP_CMD]) {
case CMD_SEL | CMD_DMA:
case CMD_SEL:
case CMD_SELATN | CMD_DMA:
case CMD_SELATN:
case CMD_SELATNS | CMD_DMA:
case CMD_SELATNS:
/*
* Initial incoming data xfer is complete so raise command
* completion interrupt
*/
s->rregs[ESP_RINTR] |= INTR_BS;
esp_raise_irq(s);
break;
case CMD_TI | CMD_DMA:
case CMD_TI:
/*
* Bus service interrupt raised because of initial change to
* DATA phase
*/
s->rregs[ESP_RINTR] |= INTR_BS;
esp_raise_irq(s);
break;
}
}
/*