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dmaengine: ipu-idmac: Split device_control 

Split the device_control callback of the IPU IDMAC driver to make use
of the newly introduced callbacks, that will eventually be used to retrieve
slave capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Maxime Ripard 2014-11-17 14:42:19 +01:00 committed by Vinod Koul
parent 71b5bd2a9c
commit 701c1edbb4
1 changed files with 56 additions and 50 deletions
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106
drivers/dma/ipu/ipu_idmac.c
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@ -1398,76 +1398,81 @@ static void idmac_issue_pending(struct dma_chan *chan)
*/
}
static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
static int idmac_pause(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
struct ipu *ipu = to_ipu(idmac);
struct list_head *list, *tmp;
unsigned long flags;
int i;
switch (cmd) {
case DMA_PAUSE:
spin_lock_irqsave(&ipu->lock, flags);
ipu_ic_disable_task(ipu, chan->chan_id);
mutex_lock(&ichan->chan_mutex);
/* Return all descriptors into "prepared" state */
list_for_each_safe(list, tmp, &ichan->queue)
list_del_init(list);
spin_lock_irqsave(&ipu->lock, flags);
ipu_ic_disable_task(ipu, chan->chan_id);
ichan->sg[0] = NULL;
ichan->sg[1] = NULL;
/* Return all descriptors into "prepared" state */
list_for_each_safe(list, tmp, &ichan->queue)
list_del_init(list);
spin_unlock_irqrestore(&ipu->lock, flags);
ichan->sg[0] = NULL;
ichan->sg[1] = NULL;
ichan->status = IPU_CHANNEL_INITIALIZED;
break;
case DMA_TERMINATE_ALL:
ipu_disable_channel(idmac, ichan,
ichan->status >= IPU_CHANNEL_ENABLED);
spin_unlock_irqrestore(&ipu->lock, flags);
tasklet_disable(&ipu->tasklet);
ichan->status = IPU_CHANNEL_INITIALIZED;
/* ichan->queue is modified in ISR, have to spinlock */
spin_lock_irqsave(&ichan->lock, flags);
list_splice_init(&ichan->queue, &ichan->free_list);
if (ichan->desc)
for (i = 0; i < ichan->n_tx_desc; i++) {
struct idmac_tx_desc *desc = ichan->desc + i;
if (list_empty(&desc->list))
/* Descriptor was prepared, but not submitted */
list_add(&desc->list, &ichan->free_list);
async_tx_clear_ack(&desc->txd);
}
ichan->sg[0] = NULL;
ichan->sg[1] = NULL;
spin_unlock_irqrestore(&ichan->lock, flags);
tasklet_enable(&ipu->tasklet);
ichan->status = IPU_CHANNEL_INITIALIZED;
break;
default:
return -ENOSYS;
}
mutex_unlock(&ichan->chan_mutex);
return 0;
}
static int idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
static int __idmac_terminate_all(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
struct ipu *ipu = to_ipu(idmac);
unsigned long flags;
int i;
ipu_disable_channel(idmac, ichan,
ichan->status >= IPU_CHANNEL_ENABLED);
tasklet_disable(&ipu->tasklet);
/* ichan->queue is modified in ISR, have to spinlock */
spin_lock_irqsave(&ichan->lock, flags);
list_splice_init(&ichan->queue, &ichan->free_list);
if (ichan->desc)
for (i = 0; i < ichan->n_tx_desc; i++) {
struct idmac_tx_desc *desc = ichan->desc + i;
if (list_empty(&desc->list))
/* Descriptor was prepared, but not submitted */
list_add(&desc->list, &ichan->free_list);
async_tx_clear_ack(&desc->txd);
}
ichan->sg[0] = NULL;
ichan->sg[1] = NULL;
spin_unlock_irqrestore(&ichan->lock, flags);
tasklet_enable(&ipu->tasklet);
ichan->status = IPU_CHANNEL_INITIALIZED;
return 0;
}
static int idmac_terminate_all(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
int ret;
mutex_lock(&ichan->chan_mutex);
ret = __idmac_control(chan, cmd, arg);
ret = __idmac_terminate_all(chan);
mutex_unlock(&ichan->chan_mutex);
@ -1568,7 +1573,7 @@ static void idmac_free_chan_resources(struct dma_chan *chan)
mutex_lock(&ichan->chan_mutex);
__idmac_control(chan, DMA_TERMINATE_ALL, 0);
__idmac_terminate_all(chan);
if (ichan->status > IPU_CHANNEL_FREE) {
#ifdef DEBUG
@ -1622,7 +1627,8 @@ static int __init ipu_idmac_init(struct ipu *ipu)
/* Compulsory for DMA_SLAVE fields */
dma->device_prep_slave_sg = idmac_prep_slave_sg;
dma->device_control = idmac_control;
dma->device_pause = idmac_pause;
dma->device_terminate_all = idmac_terminate_all;
INIT_LIST_HEAD(&dma->channels);
for (i = 0; i < IPU_CHANNELS_NUM; i++) {
@ -1655,7 +1661,7 @@ static void ipu_idmac_exit(struct ipu *ipu)
for (i = 0; i < IPU_CHANNELS_NUM; i++) {
struct idmac_channel *ichan = ipu->channel + i;
idmac_control(&ichan->dma_chan, DMA_TERMINATE_ALL, 0);
idmac_terminate_all(&ichan->dma_chan);
}
dma_async_device_unregister(&idmac->dma);