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DMAENGINE: extend the control command to include an arg

Telusuri Sumber 
This adds an argument to the DMAengine control function, so that
we can later provide control commands that need some external data
passed in through an argument akin to the ioctl() operation
prototype.

[dan.j.williams@intel.com: fix up some missed conversions]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Linus Walleij
2010-05-17 16:30:42 -07:00
committed by Dan Williams
orang tua 4aed79b281
melakukan 058276303d
14 mengubah file dengan 32 tambahan dan 21 penghapusan
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12
drivers/dma/ipu/ipu_idmac.c
Melihat File

@@ -1472,7 +1472,8 @@ static void idmac_issue_pending(struct dma_chan *chan)
*/
}
static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
@@ -1513,14 +1514,15 @@ static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
return 0;
}
static int idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
static int idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
int ret;
mutex_lock(&ichan->chan_mutex);
ret = __idmac_control(chan, cmd);
ret = __idmac_control(chan, cmd, arg);
mutex_unlock(&ichan->chan_mutex);
@@ -1616,7 +1618,7 @@ static void idmac_free_chan_resources(struct dma_chan *chan)
mutex_lock(&ichan->chan_mutex);
__idmac_control(chan, DMA_TERMINATE_ALL);
__idmac_control(chan, DMA_TERMINATE_ALL, 0);
if (ichan->status > IPU_CHANNEL_FREE) {
#ifdef DEBUG
@@ -1709,7 +1711,7 @@ static void __exit 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);
idmac_control(&ichan->dma_chan, DMA_TERMINATE_ALL, 0);
idmac_prep_slave_sg(&ichan->dma_chan, NULL, 0, DMA_NONE, 0);
}