dmaengine, async_tx: support alignment checks

[safe/jmp/linux-2.6] / crypto / async_tx / async_memset.c

diff --git a/crypto/async_tx/async_memset.c b/crypto/async_tx/async_memset.c
index 7609728..58e4a87 100644 (file)
--- a/crypto/async_tx/async_memset.c
+++ b/crypto/async_tx/async_memset.c
@@ -35,73 +35,54 @@
  * @val: fill value
  * @offset: offset in pages to start transaction
  * @len: length in bytes
- * @flags: ASYNC_TX_ACK, ASYNC_TX_DEP_ACK
- * @depend_tx: memset 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
+ *
+ * honored flags: ASYNC_TX_ACK
  */
 struct dma_async_tx_descriptor *
-async_memset(struct page *dest, int val, unsigned int 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)
+async_memset(struct page *dest, int val, unsigned int offset, size_t len,
+            struct async_submit_ctl *submit)
 {
-       struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMSET);
+       struct dma_chan *chan = async_tx_find_channel(submit, DMA_MEMSET,
+                                                     &dest, 1, NULL, 0, len);
        struct dma_device *device = chan ? chan->device : NULL;
-       int int_en = cb_fn ? 1 : 0;
-       struct dma_async_tx_descriptor *tx = device ?
-               device->device_prep_dma_memset(chan, val, len,
-                       int_en) : NULL;
-
-       if (tx) { /* run the memset asynchronously */
-               dma_addr_t dma_addr;
+       struct dma_async_tx_descriptor *tx = NULL;
 
-               pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
+       if (device && is_dma_fill_aligned(device, offset, 0, len)) {
+               dma_addr_t dma_dest;
+               unsigned long dma_prep_flags = 0;
 
-               dma_addr = dma_map_page(device->dev, dest, offset, len,
+               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, offset, len,
                                        DMA_FROM_DEVICE);
-               tx->tx_set_dest(dma_addr, tx, 0);
 
-               async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
+               tx = device->device_prep_dma_memset(chan, dma_dest, val, len,
+                                                   dma_prep_flags);
+       }
+
+       if (tx) {
+               pr_debug("%s: (async) len: %zu\n", __func__, len);
+               async_tx_submit(chan, tx, submit);
        } else { /* run the memset synchronously */
                void *dest_buf;
-               pr_debug("%s: (sync) len: %zu\n", __FUNCTION__, len);
+               pr_debug("%s: (sync) len: %zu\n", __func__, len);
 
-               dest_buf = (void *) (((char *) page_address(dest)) + offset);
+               dest_buf = page_address(dest) + offset;
 
                /* wait for any prerequisite operations */
-               if (depend_tx) {
-                       /* if ack is already set then we cannot be sure
-                        * we are referring to the correct operation
-                        */
-                       BUG_ON(depend_tx->ack);
-                       if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR)
-                               panic("%s: DMA_ERROR waiting for depend_tx\n",
-                                       __FUNCTION__);
-               }
+               async_tx_quiesce(&submit->depend_tx);
 
                memset(dest_buf, val, len);
 
-               async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param);
+               async_tx_sync_epilog(submit);
        }
 
        return tx;
 }
 EXPORT_SYMBOL_GPL(async_memset);
 
-static int __init async_memset_init(void)
-{
-       return 0;
-}
-
-static void __exit async_memset_exit(void)
-{
-       do { } while (0);
-}
-
-module_init(async_memset_init);
-module_exit(async_memset_exit);
-
 MODULE_AUTHOR("Intel Corporation");
 MODULE_DESCRIPTION("asynchronous memset api");
 MODULE_LICENSE("GPL");