void
async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx,
struct async_submit_ctl *submit)
{
struct dma_async_tx_descriptor *depend_tx = submit->depend_tx;
tx->callback = submit->cb_fn;
tx->callback_param = submit->cb_param;
if (depend_tx) {
enum submit_disposition s;
BUG_ON(async_tx_test_ack(depend_tx) || txd_next(depend_tx) ||
txd_parent(tx));
txd_lock(depend_tx);
if (txd_parent(depend_tx)) {
if (depend_tx->chan == chan) {
txd_chain(depend_tx, tx);
s = ASYNC_TX_SUBMITTED;
} else
s = ASYNC_TX_CHANNEL_SWITCH;
} else {
if (depend_tx->chan == chan)
s = ASYNC_TX_DIRECT_SUBMIT;
else
s = ASYNC_TX_CHANNEL_SWITCH;
}
txd_unlock(depend_tx);
switch (s) {
case ASYNC_TX_SUBMITTED:
break;
case ASYNC_TX_CHANNEL_SWITCH:
async_tx_channel_switch(depend_tx, tx);
break;
case ASYNC_TX_DIRECT_SUBMIT:
txd_clear_parent(tx);
tx->tx_submit(tx);
break;
}
} else {
txd_clear_parent(tx);
tx->tx_submit(tx);
}
if (submit->flags & ASYNC_TX_ACK)
async_tx_ack(tx);
if (depend_tx)
async_tx_ack(depend_tx);
}
void
async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx,
struct async_submit_ctl *submit)
{
struct dma_async_tx_descriptor *depend_tx = submit->depend_tx;
tx->callback = submit->cb_fn;
tx->callback_param = submit->cb_param;
if (depend_tx) {
enum submit_disposition s;
/* sanity check the dependency chain:
* 1/ if ack is already set then we cannot be sure
* we are referring to the correct operation
* 2/ dependencies are 1:1 i.e. two transactions can
* not depend on the same parent
*/
BUG_ON(async_tx_test_ack(depend_tx) || txd_next(depend_tx) ||
txd_parent(tx));
/* the lock prevents async_tx_run_dependencies from missing
* the setting of ->next when ->parent != NULL
*/
txd_lock(depend_tx);
if (txd_parent(depend_tx)) {
/* we have a parent so we can not submit directly
* if we are staying on the same channel: append
* else: channel switch
*/
if (depend_tx->chan == chan) {
txd_chain(depend_tx, tx);
s = ASYNC_TX_SUBMITTED;
} else
s = ASYNC_TX_CHANNEL_SWITCH;
} else {
/* we do not have a parent so we may be able to submit
* directly if we are staying on the same channel
*/
if (depend_tx->chan == chan)
s = ASYNC_TX_DIRECT_SUBMIT;
else
s = ASYNC_TX_CHANNEL_SWITCH;
}
txd_unlock(depend_tx);
switch (s) {
case ASYNC_TX_SUBMITTED:
break;
case ASYNC_TX_CHANNEL_SWITCH:
async_tx_channel_switch(depend_tx, tx);
break;
case ASYNC_TX_DIRECT_SUBMIT:
txd_clear_parent(tx);
tx->tx_submit(tx);
break;
}
} else {
txd_clear_parent(tx);
tx->tx_submit(tx);
}
if (submit->flags & ASYNC_TX_ACK)
async_tx_ack(tx);
if (depend_tx)
async_tx_ack(depend_tx);
}