From 636bdeaa1243327501edfd2a597ed7443eb4239a Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 17 Apr 2008 20:17:26 -0700 Subject: dmaengine: ack to flags: make use of the unused bits in the 'ack' field 'ack' is currently a simple integer that flags whether or not a client is done touching fields in the given descriptor. It is effectively just a single bit of information. Converting this to a flags parameter allows the other bits to be put to use to control completion actions, like dma-unmap, and capture results, like xor-zero-sum == 0. Changes are one of: 1/ convert all open-coded ->ack manipulations to use async_tx_ack and async_tx_test_ack. 2/ set the ack bit at prep time where possible 3/ make drivers store the flags at prep time 4/ add flags to the device_prep_dma_interrupt prototype Acked-by: Maciej Sosnowski Signed-off-by: Dan Williams --- drivers/dma/dmaengine.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'drivers/dma/dmaengine.c') diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index af6911a75da..d6dc70fd752 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -478,7 +478,8 @@ dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest, dma_src = dma_map_single(dev->dev, src, len, DMA_TO_DEVICE); dma_dest = dma_map_single(dev->dev, dest, len, DMA_FROM_DEVICE); - tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, 0); + tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, + DMA_CTRL_ACK); if (!tx) { dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE); @@ -486,7 +487,6 @@ dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest, return -ENOMEM; } - tx->ack = 1; tx->callback = NULL; cookie = tx->tx_submit(tx); @@ -524,7 +524,8 @@ dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page, dma_src = dma_map_single(dev->dev, kdata, len, DMA_TO_DEVICE); dma_dest = dma_map_page(dev->dev, page, offset, len, DMA_FROM_DEVICE); - tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, 0); + tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, + DMA_CTRL_ACK); if (!tx) { dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE); @@ -532,7 +533,6 @@ dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page, return -ENOMEM; } - tx->ack = 1; tx->callback = NULL; cookie = tx->tx_submit(tx); @@ -573,7 +573,8 @@ dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg, dma_src = dma_map_page(dev->dev, src_pg, src_off, len, DMA_TO_DEVICE); dma_dest = dma_map_page(dev->dev, dest_pg, dest_off, len, DMA_FROM_DEVICE); - tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, 0); + tx = dev->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, + DMA_CTRL_ACK); if (!tx) { dma_unmap_page(dev->dev, dma_src, len, DMA_TO_DEVICE); @@ -581,7 +582,6 @@ dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg, return -ENOMEM; } - tx->ack = 1; tx->callback = NULL; cookie = tx->tx_submit(tx); -- cgit v1.2.3-70-g09d2