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esp.c: move esp_select() to ESP selection commands from get_cmd()

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Since the DREQ value depends upon the result of the selection process, add a
workaround to each esp_select() to manually assert DREQ durring the MESSAGE OUT
and COMMAND phases.

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: <20240112125420.514425-6-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 12:52:57 +00:00
parent 6fcae98b2c
commit 1bcaf71b41
1 changed files with 18 additions and 7 deletions
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25
hw/scsi/esp.c
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@ -263,10 +263,6 @@ static uint32_t get_cmd(ESPState *s, uint32_t maxlen)
dmalen = MIN(fifo8_num_free(&s->cmdfifo), dmalen);
fifo8_push_all(&s->cmdfifo, buf, dmalen);
} else {
if (esp_select(s) < 0) {
return -1;
}
esp_raise_drq(s);
return 0;
}
} else {
@ -280,9 +276,6 @@ static uint32_t get_cmd(ESPState *s, uint32_t maxlen)
}
trace_esp_get_cmd(dmalen, target);
if (esp_select(s) < 0) {
return -1;
}
return dmalen;
}
@ -380,12 +373,18 @@ static void handle_satn(ESPState *s)
return;
}
esp_set_pdma_cb(s, SATN_PDMA_CB);
if (esp_select(s) < 0) {
return;
}
cmdlen = get_cmd(s, ESP_CMDFIFO_SZ);
if (cmdlen > 0) {
s->cmdfifo_cdb_offset = 1;
s->do_cmd = 0;
do_cmd(s);
} else if (cmdlen == 0) {
if (s->dma) {
esp_raise_drq(s);
}
s->do_cmd = 1;
/* Target present, but no cmd yet - switch to command phase */
s->rregs[ESP_RSEQ] = SEQ_CD;
@ -411,12 +410,18 @@ static void handle_s_without_atn(ESPState *s)
return;
}
esp_set_pdma_cb(s, S_WITHOUT_SATN_PDMA_CB);
if (esp_select(s) < 0) {
return;
}
cmdlen = get_cmd(s, ESP_CMDFIFO_SZ);
if (cmdlen > 0) {
s->cmdfifo_cdb_offset = 0;
s->do_cmd = 0;
do_cmd(s);
} else if (cmdlen == 0) {
if (s->dma) {
esp_raise_drq(s);
}
s->do_cmd = 1;
/* Target present, but no cmd yet - switch to command phase */
s->rregs[ESP_RSEQ] = SEQ_CD;
@ -446,6 +451,9 @@ static void handle_satn_stop(ESPState *s)
return;
}
esp_set_pdma_cb(s, SATN_STOP_PDMA_CB);
if (esp_select(s) < 0) {
return;
}
cmdlen = get_cmd(s, 1);
if (cmdlen > 0) {
trace_esp_handle_satn_stop(fifo8_num_used(&s->cmdfifo));
@ -456,6 +464,9 @@ static void handle_satn_stop(ESPState *s)
s->rregs[ESP_RSEQ] = SEQ_MO;
esp_raise_irq(s);
} else if (cmdlen == 0) {
if (s->dma) {
esp_raise_drq(s);
}
s->do_cmd = 1;
/* Target present, switch to message out phase */
s->rregs[ESP_RSEQ] = SEQ_MO;