static void handle_ti(ESPState *s)
{
uint32_t dmalen, minlen;
dmalen = s->rregs[ESP_TCLO] | (s->rregs[ESP_TCMID] << 8);
if (dmalen==0) {
dmalen=0x10000;
}
s->dma_counter = dmalen;
if (s->do_cmd)
minlen = (dmalen < 32) ? dmalen : 32;
else if (s->ti_size < 0)
minlen = (dmalen < -s->ti_size) ? dmalen : -s->ti_size;
else
minlen = (dmalen < s->ti_size) ? dmalen : s->ti_size;
DPRINTF("Transfer Information len %d\n", minlen);
if (s->dma) {
s->dma_left = minlen;
s->rregs[ESP_RSTAT] &= ~STAT_TC;
esp_do_dma(s);
} else if (s->do_cmd) {
DPRINTF("command len %d\n", s->cmdlen);
s->ti_size = 0;
s->cmdlen = 0;
s->do_cmd = 0;
do_cmd(s, s->cmdbuf);
return;
}
}
static void esp_command_complete(SCSIBus *bus, int reason, uint32_t tag,
uint32_t arg)
{
ESPState *s = DO_UPCAST(ESPState, busdev.qdev, bus->qbus.parent);
if (reason == SCSI_REASON_DONE) {
DPRINTF("SCSI Command complete\n");
if (s->ti_size != 0)
DPRINTF("SCSI command completed unexpectedly\n");
s->ti_size = 0;
s->dma_left = 0;
s->async_len = 0;
if (arg)
DPRINTF("Command failed\n");
s->sense = arg;
s->rregs[ESP_RSTAT] = STAT_ST;
esp_dma_done(s);
s->current_dev = NULL;
} else {
DPRINTF("transfer %d/%d\n", s->dma_left, s->ti_size);
s->async_len = arg;
s->async_buf = s->current_dev->info->get_buf(s->current_dev, 0);
if (s->dma_left) {
esp_do_dma(s);
} else if (s->dma_counter != 0 && s->ti_size <= 0) {
/* If this was the last part of a DMA transfer then the
completion interrupt is deferred to here. */
esp_dma_done(s);
}
}
}
void esp_transfer_data(SCSIRequest *req, uint32_t len)
{
ESPState *s = (ESPState*)req->hba_private;
s->async_len = len;
s->async_buf = scsiesp_req_get_buf(req);
if (s->dma_left) {
esp_do_dma(s);
} else if (s->dma_counter != 0 && s->ti_size == 0) {
/* If this was the last part of a DMA transfer then the
completion interrupt is deferred to here. */
esp_dma_done(s);
}
}
static void esp_transfer_data(SCSIRequest *req, uint32_t len)
{
ESPState *s = DO_UPCAST(ESPState, busdev.qdev, req->bus->qbus.parent);
trace_esp_transfer_data(s->dma_left, s->ti_size);
s->async_len = len;
s->async_buf = scsi_req_get_buf(req);
if (s->dma_left) {
esp_do_dma(s);
} else if (s->dma_counter != 0 && s->ti_size <= 0) {
/* If this was the last part of a DMA transfer then the
completion interrupt is deferred to here. */
esp_dma_done(s);
}
}
static int handle_ti(ESPState *s)
{
uint32_t dmalen, minlen;
if (s->dma && !s->dma_enabled) {
s->dma_cb = handle_ti;
return 1;
}
dmalen = s->rregs[ESP_TCLO];
dmalen |= s->rregs[ESP_TCMID] << 8;
dmalen |= s->rregs[ESP_TCHI] << 16;
if (dmalen == 0) {
dmalen = 0x10000;
}
s->dma_counter = dmalen;
if (s->do_cmd)
minlen = (dmalen < 32) ? dmalen : 32;
else if (s->ti_size < 0)
minlen = (dmalen < -s->ti_size) ? dmalen : -s->ti_size;
else
minlen = (dmalen < s->ti_size) ? dmalen : s->ti_size;
if (s->dma) {
if (s->dma == 1)
s->dma_left = minlen;
s->dma = 2;
s->rregs[ESP_RSTAT] &= ~STAT_TC;
if (!esp_do_dma(s)) {
s->dma_cb = handle_ti;
return 0;
}
return 1;
} else if (s->do_cmd) {
s->ti_size = 0;
s->cmdlen = 0;
s->do_cmd = 0;
do_cmd(s, s->cmdbuf);
return 1;
} else {
// no dma
s->rregs[ESP_RINTR] = INTR_BS;
esp_raise_irq(s);
}
return 1;
}
static void handle_ti(ESPState *s)
{
uint32_t dmalen, minlen;
if (s->dma && !s->dma_enabled) {
s->dma_cb = handle_ti;
return;
}
dmalen = s->rregs[ESP_TCLO];
dmalen |= s->rregs[ESP_TCMID] << 8;
dmalen |= s->rregs[ESP_TCHI] << 16;
if (dmalen==0) {
dmalen=0x10000;
}
s->dma_counter = dmalen;
if (s->do_cmd)
minlen = (dmalen < 32) ? dmalen : 32;
else if (s->ti_size < 0)
minlen = (dmalen < -s->ti_size) ? dmalen : -s->ti_size;
else
minlen = (dmalen < s->ti_size) ? dmalen : s->ti_size;
trace_esp_handle_ti(minlen);
if (s->dma) {
s->dma_left = minlen;
s->rregs[ESP_RSTAT] &= ~STAT_TC;
esp_do_dma(s);
} else if (s->do_cmd) {
trace_esp_handle_ti_cmd(s->cmdlen);
s->ti_size = 0;
s->cmdlen = 0;
s->do_cmd = 0;
do_cmd(s, s->cmdbuf);
return;
}
}
