dmaengine: add DMA_COMPL_SKIP_{SRC,DEST}_UNMAP flags to control dma unmap

[pandora-kernel.git] / include / linux / dmaengine.h

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index d08a5c5..b058d63 100644 (file)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -102,10 +102,14 @@ enum dma_transaction_type {
  * @DMA_CTRL_ACK - the descriptor cannot be reused until the client
  *     acknowledges receipt, i.e. has has a chance to establish any
  *     dependency chains
+ * @DMA_COMPL_SKIP_SRC_UNMAP - set to disable dma-unmapping the source buffer(s)
+ * @DMA_COMPL_SKIP_DEST_UNMAP - set to disable dma-unmapping the destination(s)
  */
 enum dma_ctrl_flags {
        DMA_PREP_INTERRUPT = (1 << 0),
        DMA_CTRL_ACK = (1 << 1),
+       DMA_COMPL_SKIP_SRC_UNMAP = (1 << 2),
+       DMA_COMPL_SKIP_DEST_UNMAP = (1 << 3),
 };
 
 /**
@@ -139,6 +143,7 @@ struct dma_chan_percpu {
  * @rcu: the DMA channel's RCU head
  * @device_node: used to add this to the device chan list
  * @local: per-cpu pointer to a struct dma_chan_percpu
+ * @client-count: how many clients are using this channel
  */
 struct dma_chan {
        struct dma_device *device;
@@ -154,6 +159,7 @@ struct dma_chan {
 
        struct list_head device_node;
        struct dma_chan_percpu *local;
+       int client_count;
 };
 
 #define to_dma_chan(p) container_of(p, struct dma_chan, dev)
@@ -279,7 +285,8 @@ struct dma_device {
        int dev_id;
        struct device *dev;
 
-       int (*device_alloc_chan_resources)(struct dma_chan *chan);
+       int (*device_alloc_chan_resources)(struct dma_chan *chan,
+                       struct dma_client *client);
        void (*device_free_chan_resources)(struct dma_chan *chan);
 
        struct dma_async_tx_descriptor *(*device_prep_dma_memcpy)(