async_tx: kill ->device_dependency_added

DMA drivers no longer need to be notified of dependency submission
events as async_tx_run_dependencies and async_tx_channel_switch will
handle the scheduling and execution of dependent operations.

[sfr@canb.auug.org.au: extend this for fsldma]
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 9cb898a..af6911a 100644 (file)
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -362,7 +362,6 @@ int dma_async_device_register(struct dma_device *device)
 
        BUG_ON(!device->device_alloc_chan_resources);
        BUG_ON(!device->device_free_chan_resources);
-       BUG_ON(!device->device_dependency_added);
        BUG_ON(!device->device_is_tx_complete);
        BUG_ON(!device->device_issue_pending);
        BUG_ON(!device->dev);

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index d8ae18d..95b36b7 100644 (file)
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -658,13 +658,6 @@ static void fsl_dma_memcpy_issue_pending(struct dma_chan *chan)
        fsl_chan_xfer_ld_queue(fsl_chan);
 }
 
-static void fsl_dma_dependency_added(struct dma_chan *chan)
-{
-       struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
-
-       fsl_chan_ld_cleanup(fsl_chan);
-}
-
 /**
  * fsl_dma_is_complete - Determine the DMA status
  * @fsl_chan : Freescale DMA channel
@@ -1089,7 +1082,6 @@ static int __devinit of_fsl_dma_probe(struct of_device *dev,
        fdev->common.device_prep_dma_memcpy = fsl_dma_prep_memcpy;
        fdev->common.device_is_tx_complete = fsl_dma_is_complete;
        fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending;
-       fdev->common.device_dependency_added = fsl_dma_dependency_added;
        fdev->common.dev = &dev->dev;
 
        irq = irq_of_parse_and_map(dev->node, 0);

diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index 4017d9e..1517fe4 100644 (file)
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -924,17 +924,6 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *ioat_chan)
        spin_unlock_bh(&ioat_chan->cleanup_lock);
 }
 
-static void ioat_dma_dependency_added(struct dma_chan *chan)
-{
-       struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
-       spin_lock_bh(&ioat_chan->desc_lock);
-       if (ioat_chan->pending == 0) {
-               spin_unlock_bh(&ioat_chan->desc_lock);
-               ioat_dma_memcpy_cleanup(ioat_chan);
-       } else
-               spin_unlock_bh(&ioat_chan->desc_lock);
-}
-
 /**
  * ioat_dma_is_complete - poll the status of a IOAT DMA transaction
  * @chan: IOAT DMA channel handle
@@ -1316,7 +1305,6 @@ struct ioatdma_device *ioat_dma_probe(struct pci_dev *pdev,
 
        dma_cap_set(DMA_MEMCPY, device->common.cap_mask);
        device->common.device_is_tx_complete = ioat_dma_is_complete;
-       device->common.device_dependency_added = ioat_dma_dependency_added;
        switch (device->version) {
        case IOAT_VER_1_2:
                device->common.device_prep_dma_memcpy = ioat1_dma_prep_memcpy;

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 21854cd..2aa3df5 100644 (file)
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -672,12 +672,6 @@ iop_adma_prep_dma_zero_sum(struct dma_chan *chan, dma_addr_t *dma_src,
        return sw_desc ? &sw_desc->async_tx : NULL;
 }
 
-static void iop_adma_dependency_added(struct dma_chan *chan)
-{
-       struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-       tasklet_schedule(&iop_chan->irq_tasklet);
-}
-
 static void iop_adma_free_chan_resources(struct dma_chan *chan)
 {
        struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
@@ -1178,7 +1172,6 @@ static int __devinit iop_adma_probe(struct platform_device *pdev)
        dma_dev->device_free_chan_resources = iop_adma_free_chan_resources;
        dma_dev->device_is_tx_complete = iop_adma_is_complete;
        dma_dev->device_issue_pending = iop_adma_issue_pending;
-       dma_dev->device_dependency_added = iop_adma_dependency_added;
        dma_dev->dev = &pdev->dev;
 
        /* set prep routines based on capability */

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 91252a7..cd34df7 100644 (file)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -258,7 +258,6 @@ struct dma_async_tx_descriptor {
  * @device_prep_dma_zero_sum: prepares a zero_sum operation
  * @device_prep_dma_memset: prepares a memset operation
  * @device_prep_dma_interrupt: prepares an end of chain interrupt operation
- * @device_dependency_added: async_tx notifies the channel about new deps
  * @device_issue_pending: push pending transactions to hardware
  */
 struct dma_device {
@@ -293,7 +292,6 @@ struct dma_device {
        struct dma_async_tx_descriptor *(*device_prep_dma_interrupt)(
                struct dma_chan *chan);
 
-       void (*device_dependency_added)(struct dma_chan *chan);
        enum dma_status (*device_is_tx_complete)(struct dma_chan *chan,
                        dma_cookie_t cookie, dma_cookie_t *last,
                        dma_cookie_t *used);