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esp.c: convert do_dma_pdma_db() to switch statement based upon SCSI phase 

Currently only the DATA IN and DATA OUT phases are supported.

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: <20240112125420.514425-40-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 12:53:31 +00:00
parent 1454dc765b
commit 844b3a84ea
1 changed files with 12 additions and 7 deletions
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19
hw/scsi/esp.c
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@ -542,7 +542,6 @@ static void esp_dma_ti_check(ESPState *s)
static void do_dma_pdma_cb(ESPState *s) static void do_dma_pdma_cb(ESPState *s)
{ {
int to_device = (esp_get_phase(s) == STAT_DO);
uint8_t buf[ESP_CMDFIFO_SZ]; uint8_t buf[ESP_CMDFIFO_SZ];
int len; int len;
uint32_t n; uint32_t n;
@ -582,11 +581,11 @@ static void do_dma_pdma_cb(ESPState *s)
return; return;
} }
if (!s->current_req) { switch (esp_get_phase(s)) {
return; case STAT_DO:
} if (!s->current_req) {
return;
if (to_device) { }
/* Copy FIFO data to device */ /* Copy FIFO data to device */
len = MIN(s->async_len, ESP_FIFO_SZ); len = MIN(s->async_len, ESP_FIFO_SZ);
len = MIN(len, fifo8_num_used(&s->fifo)); len = MIN(len, fifo8_num_used(&s->fifo));
@ -602,7 +601,12 @@ static void do_dma_pdma_cb(ESPState *s)
} }
esp_dma_ti_check(s); esp_dma_ti_check(s);
} else { break;
case STAT_DI:
if (!s->current_req) {
return;
}
/* Copy device data to FIFO */ /* Copy device data to FIFO */
len = MIN(s->async_len, esp_get_tc(s)); len = MIN(s->async_len, esp_get_tc(s));
len = MIN(len, fifo8_num_free(&s->fifo)); len = MIN(len, fifo8_num_free(&s->fifo));
@ -620,6 +624,7 @@ static void do_dma_pdma_cb(ESPState *s)
} }
esp_dma_ti_check(s); esp_dma_ti_check(s);
break;
} }
} }