Merge branch 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mcheha...

[safe/jmp/linux-2.6] / include / linux / dmaengine.h

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index db23fd5..20ea12c 100644 (file)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -31,6 +31,8 @@
  * if dma_cookie_t is >0 it's a DMA request cookie, <0 it's an error code
  */
 typedef s32 dma_cookie_t;
+#define DMA_MIN_COOKIE 1
+#define DMA_MAX_COOKIE INT_MAX
 
 #define dma_submit_error(cookie) ((cookie) < 0 ? 1 : 0)
 
@@ -74,7 +76,7 @@ enum dma_transaction_type {
  *  control completion, and communicate status.
  * @DMA_PREP_INTERRUPT - trigger an interrupt (callback) upon completion of
  *  this transaction
- * @DMA_CTRL_ACK - the descriptor cannot be reused until the client
+ * @DMA_CTRL_ACK - if clear, 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)
@@ -162,7 +164,7 @@ struct dma_chan {
        struct dma_chan_dev *dev;
 
        struct list_head device_node;
-       struct dma_chan_percpu *local;
+       struct dma_chan_percpu __percpu *local;
        int client_count;
        int table_count;
        void *private;
@@ -211,8 +213,6 @@ typedef void (*dma_async_tx_callback)(void *dma_async_param);
  * @flags: flags to augment operation preparation, control completion, and
  *     communicate status
  * @phys: physical address of the descriptor
- * @tx_list: driver common field for operations that require multiple
- *     descriptors
  * @chan: target channel for this operation
  * @tx_submit: set the prepared descriptor(s) to be executed by the engine
  * @callback: routine to call after this operation is complete
@@ -226,7 +226,6 @@ struct dma_async_tx_descriptor {
        dma_cookie_t cookie;
        enum dma_ctrl_flags flags; /* not a 'long' to pack with cookie */
        dma_addr_t phys;
-       struct list_head tx_list;
        struct dma_chan *chan;
        dma_cookie_t (*tx_submit)(struct dma_async_tx_descriptor *tx);
        dma_async_tx_callback callback;
@@ -245,6 +244,10 @@ struct dma_async_tx_descriptor {
  * @cap_mask: one or more dma_capability flags
  * @max_xor: maximum number of xor sources, 0 if no capability
  * @max_pq: maximum number of PQ sources and PQ-continue capability
+ * @copy_align: alignment shift for memcpy operations
+ * @xor_align: alignment shift for xor operations
+ * @pq_align: alignment shift for pq operations
+ * @fill_align: alignment shift for memset operations
  * @dev_id: unique device ID
  * @dev: struct device reference for dma mapping api
  * @device_alloc_chan_resources: allocate resources and return the
@@ -271,6 +274,10 @@ struct dma_device {
        dma_cap_mask_t  cap_mask;
        unsigned short max_xor;
        unsigned short max_pq;
+       u8 copy_align;
+       u8 xor_align;
+       u8 pq_align;
+       u8 fill_align;
        #define DMA_HAS_PQ_CONTINUE (1 << 15)
 
        int dev_id;
@@ -314,6 +321,42 @@ struct dma_device {
        void (*device_issue_pending)(struct dma_chan *chan);
 };
 
+static inline bool dmaengine_check_align(u8 align, size_t off1, size_t off2, size_t len)
+{
+       size_t mask;
+
+       if (!align)
+               return true;
+       mask = (1 << align) - 1;
+       if (mask & (off1 | off2 | len))
+               return false;
+       return true;
+}
+
+static inline bool is_dma_copy_aligned(struct dma_device *dev, size_t off1,
+                                      size_t off2, size_t len)
+{
+       return dmaengine_check_align(dev->copy_align, off1, off2, len);
+}
+
+static inline bool is_dma_xor_aligned(struct dma_device *dev, size_t off1,
+                                     size_t off2, size_t len)
+{
+       return dmaengine_check_align(dev->xor_align, off1, off2, len);
+}
+
+static inline bool is_dma_pq_aligned(struct dma_device *dev, size_t off1,
+                                    size_t off2, size_t len)
+{
+       return dmaengine_check_align(dev->pq_align, off1, off2, len);
+}
+
+static inline bool is_dma_fill_aligned(struct dma_device *dev, size_t off1,
+                                      size_t off2, size_t len)
+{
+       return dmaengine_check_align(dev->fill_align, off1, off2, len);
+}
+
 static inline void
 dma_set_maxpq(struct dma_device *dma, int maxpq, int has_pq_continue)
 {