Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / crypto / async_tx / async_memcpy.c

diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index ddccfb0..0ec1fb6 100644 (file)
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -33,28 +33,31 @@
  * async_memcpy - attempt to copy memory with a dma engine.
  * @dest: destination page
  * @src: src page
- * @offset: offset in pages to start transaction
+ * @dest_offset: offset into 'dest' to start transaction
+ * @src_offset: offset into 'src' to start transaction
  * @len: length in bytes
- * @flags: ASYNC_TX_ACK, ASYNC_TX_DEP_ACK,
- * @depend_tx: memcpy depends on the result of this transaction
- * @cb_fn: function to call when the memcpy completes
- * @cb_param: parameter to pass to the callback routine
+ * @submit: submission / completion modifiers
+ *
+ * honored flags: ASYNC_TX_ACK
  */
 struct dma_async_tx_descriptor *
 async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
-       unsigned int src_offset, size_t len, enum async_tx_flags flags,
-       struct dma_async_tx_descriptor *depend_tx,
-       dma_async_tx_callback cb_fn, void *cb_param)
+            unsigned int src_offset, size_t len,
+            struct async_submit_ctl *submit)
 {
-       struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMCPY,
+       struct dma_chan *chan = async_tx_find_channel(submit, DMA_MEMCPY,
                                                      &dest, 1, &src, 1, len);
        struct dma_device *device = chan ? chan->device : NULL;
        struct dma_async_tx_descriptor *tx = NULL;
 
-       if (device) {
+       if (device && is_dma_copy_aligned(device, src_offset, dest_offset, len)) {
                dma_addr_t dma_dest, dma_src;
-               unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
+               unsigned long dma_prep_flags = 0;
 
+               if (submit->cb_fn)
+                       dma_prep_flags |= DMA_PREP_INTERRUPT;
+               if (submit->flags & ASYNC_TX_FENCE)
+                       dma_prep_flags |= DMA_PREP_FENCE;
                dma_dest = dma_map_page(device->dev, dest, dest_offset, len,
                                        DMA_FROM_DEVICE);
 
@@ -67,13 +70,13 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
 
        if (tx) {
                pr_debug("%s: (async) len: %zu\n", __func__, len);
-               async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
+               async_tx_submit(chan, tx, submit);
        } else {
                void *dest_buf, *src_buf;
                pr_debug("%s: (sync) len: %zu\n", __func__, len);
 
                /* wait for any prerequisite operations */
-               async_tx_quiesce(&depend_tx);
+               async_tx_quiesce(&submit->depend_tx);
 
                dest_buf = kmap_atomic(dest, KM_USER0) + dest_offset;
                src_buf = kmap_atomic(src, KM_USER1) + src_offset;
@@ -83,26 +86,13 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
                kunmap_atomic(dest_buf, KM_USER0);
                kunmap_atomic(src_buf, KM_USER1);
 
-               async_tx_sync_epilog(cb_fn, cb_param);
+               async_tx_sync_epilog(submit);
        }
 
        return tx;
 }
 EXPORT_SYMBOL_GPL(async_memcpy);
 
-static int __init async_memcpy_init(void)
-{
-       return 0;
-}
-
-static void __exit async_memcpy_exit(void)
-{
-       do { } while (0);
-}
-
-module_init(async_memcpy_init);
-module_exit(async_memcpy_exit);
-
 MODULE_AUTHOR("Intel Corporation");
 MODULE_DESCRIPTION("asynchronous memcpy api");
 MODULE_LICENSE("GPL");