* @src: src page
* @offset: offset in pages to start transaction
* @len: length in bytes
- * @flags: ASYNC_TX_ASSUME_COHERENT, ASYNC_TX_ACK, ASYNC_TX_DEP_ACK,
- * ASYNC_TX_KMAP_SRC, ASYNC_TX_KMAP_DST
+ * @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
struct dma_async_tx_descriptor *depend_tx,
dma_async_tx_callback cb_fn, void *cb_param)
{
- struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMCPY);
+ struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_MEMCPY,
+ &dest, 1, &src, 1, 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_memcpy(chan, len,
- int_en) : NULL;
+ struct dma_async_tx_descriptor *tx = NULL;
- if (tx) { /* run the memcpy asynchronously */
- dma_addr_t addr;
- enum dma_data_direction dir;
+ if (device) {
+ dma_addr_t dma_dest, dma_src;
+ unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
- pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
-
- dir = (flags & ASYNC_TX_ASSUME_COHERENT) ?
- DMA_NONE : DMA_FROM_DEVICE;
+ dma_dest = dma_map_page(device->dev, dest, dest_offset, len,
+ DMA_FROM_DEVICE);
- addr = dma_map_page(device->dev, dest, dest_offset, len, dir);
- tx->tx_set_dest(addr, tx, 0);
+ dma_src = dma_map_page(device->dev, src, src_offset, len,
+ DMA_TO_DEVICE);
- dir = (flags & ASYNC_TX_ASSUME_COHERENT) ?
- DMA_NONE : DMA_TO_DEVICE;
-
- addr = dma_map_page(device->dev, src, src_offset, len, dir);
- tx->tx_set_src(addr, tx, 0);
+ tx = device->device_prep_dma_memcpy(chan, dma_dest, dma_src,
+ len, dma_prep_flags);
+ }
+ if (tx) {
+ pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
- } else { /* run the memcpy synchronously */
+ } else {
void *dest_buf, *src_buf;
pr_debug("%s: (sync) len: %zu\n", __FUNCTION__, len);
__FUNCTION__);
}
- if (flags & ASYNC_TX_KMAP_DST)
- dest_buf = kmap_atomic(dest, KM_USER0) + dest_offset;
- else
- dest_buf = page_address(dest) + dest_offset;
-
- if (flags & ASYNC_TX_KMAP_SRC)
- src_buf = kmap_atomic(src, KM_USER0) + src_offset;
- else
- src_buf = page_address(src) + src_offset;
+ dest_buf = kmap_atomic(dest, KM_USER0) + dest_offset;
+ src_buf = kmap_atomic(src, KM_USER1) + src_offset;
memcpy(dest_buf, src_buf, len);
- if (flags & ASYNC_TX_KMAP_DST)
- kunmap_atomic(dest_buf, KM_USER0);
-
- if (flags & ASYNC_TX_KMAP_SRC)
- kunmap_atomic(src_buf, KM_USER0);
+ kunmap_atomic(dest_buf, KM_USER0);
+ kunmap_atomic(src_buf, KM_USER1);
async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param);
}