DMAENGINE: extend the control command to include an arg

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>

14 files changed, 32 insertions, 21 deletions

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 93ed99c84cf1..ee805a43f879 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -759,7 +759,8 @@ err_desc_get:
         return NULL;
 }
 
-static int atc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int atc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                       unsigned long arg)
 {
         struct at_dma_chan      *atchan = to_at_dma_chan(chan);
         struct at_dma           *atdma = to_at_dma(chan->device);
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 4233440741a2..a724e6be1b4d 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -942,7 +942,7 @@ coh901318_free_chan_resources(struct dma_chan *chan)
 
         spin_unlock_irqrestore(&cohc->lock, flags);
 
-        chan->device->device_control(chan, DMA_TERMINATE_ALL);
+        chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
 }
 
 
@@ -1176,7 +1176,8 @@ coh901318_issue_pending(struct dma_chan *chan)
 }
 
 static int
-coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                  unsigned long arg)
 {
         unsigned long flags;
         struct coh901318_chan *cohc = to_coh901318_chan(chan);
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 18fb5b41cedf..a3991ab0d67e 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -781,7 +781,8 @@ err_desc_get:
         return NULL;
 }
 
-static int dwc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int dwc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                       unsigned long arg)
 {
         struct dw_dma_chan      *dwc = to_dw_dma_chan(chan);
         struct dw_dma           *dw = to_dw_dma(chan->device);
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index cb1924f46c9e..005329d496bd 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -775,7 +775,7 @@ fail:
 }
 
 static int fsl_dma_device_control(struct dma_chan *dchan,
-                                  enum dma_ctrl_cmd cmd)
+                                  enum dma_ctrl_cmd cmd, unsigned long arg)
 {
         struct fsldma_chan *chan;
         unsigned long flags;
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 246a6143e4a7..cb26ee9773d6 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -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);
         }
 
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 98f82cdb404c..e9de1d35c20d 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -580,7 +580,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
                                direction, flags);
 }
 
-static int sh_dmae_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int sh_dmae_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                           unsigned long arg)
 {
         struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
 
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 81fec95312b6..c426829f6ab8 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2065,7 +2065,8 @@ static void d40_issue_pending(struct dma_chan *chan)
         spin_unlock_irqrestore(&d40c->lock, flags);
 }
 
-static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                       unsigned long arg)
 {
         unsigned long flags;
         struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index 44b346d8d319..0172fa3c7a2b 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -611,7 +611,8 @@ static struct dma_async_tx_descriptor *td_prep_slave_sg(struct dma_chan *chan,
         return &td_desc->txd;
 }
 
-static int td_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int td_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                      unsigned long arg)
 {
         struct timb_dma_chan *td_chan =
                 container_of(chan, struct timb_dma_chan, chan);
diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index e523737639aa..d02edb05910e 100644
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -938,7 +938,8 @@ txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
         return &first->txd;
 }
 
-static int txx9dmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int txx9dmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                            unsigned long arg)
 {
         struct txx9dmac_chan *dc = to_txx9dmac_chan(chan);
         struct txx9dmac_desc *desc, *_desc;
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index ae6d24ba4f08..fd2d24f81478 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -578,7 +578,7 @@ static void atmci_stop_dma(struct atmel_mci *host)
         struct dma_chan *chan = host->data_chan;
 
         if (chan) {
-                chan->device->device_control(chan, DMA_TERMINATE_ALL);
+          chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
                 atmci_dma_cleanup(host);
         } else {
                 /* Data transfer was stopped by the interrupt handler */
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 690988237971..882f3d5ed028 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -1087,7 +1087,7 @@ static void work_fn_rx(struct work_struct *work)
                 unsigned long flags;
                 int count;
 
-                chan->device->device_control(chan, DMA_TERMINATE_ALL);
+                chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
                 dev_dbg(port->dev, "Read %u bytes with cookie %d\n",
                         sh_desc->partial, sh_desc->cookie);
 
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index 3aa50bc276eb..7cfc170bce19 100644
--- a/drivers/video/mx3fb.c
+++ b/drivers/video/mx3fb.c
@@ -388,7 +388,7 @@ static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
         spin_unlock_irqrestore(&mx3fb->lock, flags);
 
         mx3_fbi->txd->chan->device->device_control(mx3_fbi->txd->chan,
-                                                   DMA_TERMINATE_ALL);
+                                                   DMA_TERMINATE_ALL, 0);
         mx3_fbi->txd = NULL;
         mx3_fbi->cookie = -EINVAL;
 }
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 50b7b3e0d572..17456571ff7a 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -347,7 +347,8 @@ struct dma_device {
                 struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_data_direction direction,
                 unsigned long flags);
-        int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd);
+        int (*device_control)(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                unsigned long arg);
 
         enum dma_status (*device_tx_status)(struct dma_chan *chan,
                                             dma_cookie_t cookie,
diff --git a/sound/soc/txx9/txx9aclc.c b/sound/soc/txx9/txx9aclc.c
index b35d00706c0e..9398f507f77f 100644
--- a/sound/soc/txx9/txx9aclc.c
+++ b/sound/soc/txx9/txx9aclc.c
@@ -159,7 +159,7 @@ static void txx9aclc_dma_tasklet(unsigned long data)
                 void __iomem *base = drvdata->base;
 
                 spin_unlock_irqrestore(&dmadata->dma_lock, flags);
-                chan->device->device_control(chan, DMA_TERMINATE_ALL);
+                chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
                 /* first time */
                 for (i = 0; i < NR_DMA_CHAIN; i++) {
                         desc = txx9aclc_dma_submit(dmadata,
@@ -267,7 +267,7 @@ static int txx9aclc_pcm_close(struct snd_pcm_substream *substream)
         struct dma_chan *chan = dmadata->dma_chan;
 
         dmadata->frag_count = -1;
-        chan->device->device_control(chan, DMA_TERMINATE_ALL);
+        chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
         return 0;
 }
 
@@ -396,7 +396,8 @@ static int txx9aclc_pcm_remove(struct platform_device *pdev)
                 struct dma_chan *chan = dmadata->dma_chan;
                 if (chan) {
                         dmadata->frag_count = -1;
-                        chan->device->device_control(chan, DMA_TERMINATE_ALL);
+                        chan->device->device_control(chan,
+                                                     DMA_TERMINATE_ALL, 0);
                         dma_release_channel(chan);
                 }
                 dev->dmadata[i].dma_chan = NULL;