linux-kernel - [PATCH 05/20] dmatest: do DMA unmap for MEMCPY operations

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Date:	Mon, 05 Nov 2012 11:00:16 +0100
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	djbw@...com, dwmw2@...radead.org, hskinnemoen@...il.com,
	iws@...o.caltech.edu, vinod.koul@...el.com, vipin.kumar@...com,
	t.figa@...sung.com, kyungmin.park@...sung.com,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH 05/20] dmatest: do DMA unmap for MEMCPY operations

Make driver do DMA unmap for MEMCPY operations.

Cc: Vinod Koul <vinod.koul@...el.com>
Cc: Havard Skinnemoen <hskinnemoen@...il.com>
Cc: Tomasz Figa <t.figa@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/dma/dmatest.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 24225f0..22655a7 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -306,10 +306,16 @@ static int dmatest_func(void *data)
 
 	/*
 	 * src buffers are freed by the DMAEngine code with dma_unmap_single()
+	 * (except DMA_MEMCPY operations)
 	 * dst buffers are freed by ourselves below
 	 */
 	flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT
-	      | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE;
+	      | DMA_COMPL_SKIP_DEST_UNMAP;
+
+	if (thread->type == DMA_MEMCPY)
+		flags |= DMA_COMPL_SKIP_SRC_UNMAP;
+	else
+		flags |= DMA_COMPL_SRC_UNMAP_SINGLE;
 
 	while (!kthread_should_stop()
 	       && !(iterations && total_tests >= iterations)) {
@@ -443,6 +449,9 @@ static int dmatest_func(void *data)
 		}
 
 		/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
+		if (thread->type == DMA_MEMCPY)
+			dma_unmap_single(dev->dev, dma_srcs[0], len,
+					 DMA_TO_DEVICE);
 		for (i = 0; i < dst_cnt; i++)
 			dma_unmap_single(dev->dev, dma_dsts[i], test_buf_size,
 					 DMA_BIDIRECTIONAL);
-- 
1.8.0

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