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staging: comedi: mite: make mite_ack_linkc() handle mite_sync_dma() 

The mite dma is always synced on a LINKC status. Some of the mite users
sync the dma regadless of the status.

Add a 'sync' parameter to mite_ack_linkc() to force a dma sync. Then do
the dma sync as needed.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2016-04-21 12:04:44 -07:00 committed by Greg Kroah-Hartman
parent 3da088cae2
commit f7d005c33c
5 changed files with 20 additions and 32 deletions
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10
drivers/staging/comedi/drivers/mite.c
View File

@ -779,15 +779,21 @@ static unsigned int mite_get_status(struct mite_channel *mite_chan)
}
unsigned int mite_ack_linkc(struct mite_channel *mite_chan,
struct comedi_subdevice *s)
struct comedi_subdevice *s,
bool sync)
{
struct mite_struct *mite = mite_chan->mite;
unsigned int status;
status = mite_get_status(mite_chan);
if (status & CHSR_LINKC)
if (status & CHSR_LINKC) {
writel(CHOR_CLRLC,
mite->mite_io_addr + MITE_CHOR(mite_chan->channel));
sync = true;
}
if (sync)
mite_sync_dma(mite_chan, s);
if (status & CHSR_XFERR) {
dev_err(s->device->class_dev,
"mite: transfer error %08x\n", status);

4
drivers/staging/comedi/drivers/mite.h
View File

@ -93,8 +93,8 @@ void mite_dma_arm(struct mite_channel *mite_chan);
void mite_dma_disarm(struct mite_channel *mite_chan);
void mite_sync_dma(struct mite_channel *mite_chan, struct comedi_subdevice *s);
u32 mite_bytes_in_transit(struct mite_channel *mite_chan);
unsigned int mite_ack_linkc(struct mite_channel *mite_chan,
struct comedi_subdevice *s);
unsigned int mite_ack_linkc(struct mite_channel *, struct comedi_subdevice *,
bool sync);
int mite_done(struct mite_channel *mite_chan);
void mite_prep_dma(struct mite_channel *mite_chan,

23
drivers/staging/comedi/drivers/ni_mio_common.c
View File

@ -3632,10 +3632,8 @@ static void handle_cdio_interrupt(struct comedi_device *dev)
unsigned long flags;
spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
if (devpriv->cdo_mite_chan) {
mite_ack_linkc(devpriv->cdo_mite_chan, s);
mite_sync_dma(devpriv->cdo_mite_chan, s);
}
if (devpriv->cdo_mite_chan)
mite_ack_linkc(devpriv->cdo_mite_chan, s, true);
spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
cdio_status = ni_readl(dev, NI_M_CDIO_STATUS_REG);
@ -5150,21 +5148,12 @@ static irqreturn_t ni_E_interrupt(int irq, void *d)
#ifdef PCIDMA
if (devpriv->mite) {
unsigned long flags_too;
unsigned int m_status;
spin_lock_irqsave(&devpriv->mite_channel_lock, flags_too);
if (s_ai && devpriv->ai_mite_chan) {
m_status = mite_ack_linkc(devpriv->ai_mite_chan, s_ai);
if (m_status & CHSR_LINKC)
mite_sync_dma(devpriv->ai_mite_chan, s_ai);
}
if (s_ao && devpriv->ao_mite_chan) {
m_status = mite_ack_linkc(devpriv->ao_mite_chan, s_ao);
if (m_status & CHSR_LINKC)
mite_sync_dma(devpriv->ao_mite_chan, s_ao);
}
if (s_ai && devpriv->ai_mite_chan)
mite_ack_linkc(devpriv->ai_mite_chan, s_ai, false);
if (s_ao && devpriv->ao_mite_chan)
mite_ack_linkc(devpriv->ao_mite_chan, s_ao, false);
spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags_too);
}
#endif

9
drivers/staging/comedi/drivers/ni_pcidio.c
View File

@ -400,13 +400,8 @@ static irqreturn_t nidio_interrupt(int irq, void *d)
spin_lock(&devpriv->mite_channel_lock);
if (devpriv->di_mite_chan) {
unsigned int m_status = mite_ack_linkc(devpriv->di_mite_chan,
s);
if (m_status & CHSR_LINKC) {
mite_sync_dma(devpriv->di_mite_chan, s);
/* XXX need to byteswap */
}
mite_ack_linkc(devpriv->di_mite_chan, s, false);
/* XXX need to byteswap sync'ed dma */
}
spin_unlock(&devpriv->mite_channel_lock);

6
drivers/staging/comedi/drivers/ni_tiocmd.c
View File

@ -428,10 +428,8 @@ void ni_tio_handle_interrupt(struct ni_gpct *counter,
break;
}
spin_lock_irqsave(&counter->lock, flags);
if (counter->mite_chan) {
mite_ack_linkc(counter->mite_chan, s);
mite_sync_dma(counter->mite_chan, s);
}
if (counter->mite_chan)
mite_ack_linkc(counter->mite_chan, s, true);
spin_unlock_irqrestore(&counter->lock, flags);
}
EXPORT_SYMBOL_GPL(ni_tio_handle_interrupt);