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Commit 4076e755 authored by Dan Williams's avatar Dan Williams
Browse files

dmatest: convert to dmaengine_unmap_data 



Remove the open coded unmap and add coverage for this core functionality
to dmatest.

Also fixes up a couple places where we leaked dma mappings.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 2d88ce76

drivers/dma/dmatest.c

+44 −42
Original line number Diff line number Diff line
@@ -326,20 +326,6 @@ static void dmatest_callback(void *arg) 
	wake_up_all(done->wait);

}



static inline void unmap_src(struct device *dev, dma_addr_t *addr, size_t len,

			     unsigned int count)

{

	while (count--)

		dma_unmap_single(dev, addr[count], len, DMA_TO_DEVICE);

}



static inline void unmap_dst(struct device *dev, dma_addr_t *addr, size_t len,

			     unsigned int count)

{

	while (count--)

		dma_unmap_single(dev, addr[count], len, DMA_BIDIRECTIONAL);

}



static unsigned int min_odd(unsigned int x, unsigned int y)

{

	unsigned int val = min(x, y);
@@ -484,8 +470,9 @@ static int dmatest_func(void *data) 
	while (!kthread_should_stop()

	       && !(params->iterations && total_tests >= params->iterations)) {

		struct dma_async_tx_descriptor *tx = NULL;

		dma_addr_t dma_srcs[src_cnt];

		dma_addr_t dma_dsts[dst_cnt];

		struct dmaengine_unmap_data *um;

		dma_addr_t srcs[src_cnt];

		dma_addr_t *dsts;

		u8 align = 0;



		total_tests++;
@@ -530,61 +517,75 @@ static int dmatest_func(void *data) 
			len = 1 << align;

		total_len += len;



		for (i = 0; i < src_cnt; i++) {

			u8 *buf = thread->srcs[i] + src_off;

		um = dmaengine_get_unmap_data(dev->dev, src_cnt+dst_cnt,

					      GFP_KERNEL);

		if (!um) {

			failed_tests++;

			result("unmap data NULL", total_tests,

			       src_off, dst_off, len, ret);

			continue;

		}



			dma_srcs[i] = dma_map_single(dev->dev, buf, len,

						     DMA_TO_DEVICE);

			ret = dma_mapping_error(dev->dev, dma_srcs[i]);

		um->len = params->buf_size;

		for (i = 0; i < src_cnt; i++) {

			unsigned long buf = (unsigned long) thread->srcs[i];

			struct page *pg = virt_to_page(buf);

			unsigned pg_off = buf & ~PAGE_MASK;



			um->addr[i] = dma_map_page(dev->dev, pg, pg_off,

						   um->len, DMA_TO_DEVICE);

			srcs[i] = um->addr[i] + src_off;

			ret = dma_mapping_error(dev->dev, um->addr[i]);

			if (ret) {

				unmap_src(dev->dev, dma_srcs, len, i);

				dmaengine_unmap_put(um);

				result("src mapping error", total_tests,

				       src_off, dst_off, len, ret);

				failed_tests++;

				continue;

			}

			um->to_cnt++;

		}

		/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */

		dsts = &um->addr[src_cnt];

		for (i = 0; i < dst_cnt; i++) {

			dma_dsts[i] = dma_map_single(dev->dev, thread->dsts[i],

						     params->buf_size,

			unsigned long buf = (unsigned long) thread->dsts[i];

			struct page *pg = virt_to_page(buf);

			unsigned pg_off = buf & ~PAGE_MASK;



			dsts[i] = dma_map_page(dev->dev, pg, pg_off, um->len,

					       DMA_BIDIRECTIONAL);

			ret = dma_mapping_error(dev->dev, dma_dsts[i]);

			ret = dma_mapping_error(dev->dev, dsts[i]);

			if (ret) {

				unmap_src(dev->dev, dma_srcs, len, src_cnt);

				unmap_dst(dev->dev, dma_dsts, params->buf_size,

					  i);

				dmaengine_unmap_put(um);

				result("dst mapping error", total_tests,

				       src_off, dst_off, len, ret);

				failed_tests++;

				continue;

			}

			um->bidi_cnt++;

		}



		if (thread->type == DMA_MEMCPY)

			tx = dev->device_prep_dma_memcpy(chan,

							 dma_dsts[0] + dst_off,

							 dma_srcs[0], len,

							 flags);

							 dsts[0] + dst_off,

							 srcs[0], len, flags);

		else if (thread->type == DMA_XOR)

			tx = dev->device_prep_dma_xor(chan,

						      dma_dsts[0] + dst_off,

						      dma_srcs, src_cnt,

						      dsts[0] + dst_off,

						      srcs, src_cnt,

						      len, flags);

		else if (thread->type == DMA_PQ) {

			dma_addr_t dma_pq[dst_cnt];



			for (i = 0; i < dst_cnt; i++)

				dma_pq[i] = dma_dsts[i] + dst_off;

			tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs,

				dma_pq[i] = dsts[i] + dst_off;

			tx = dev->device_prep_dma_pq(chan, dma_pq, srcs,

						     src_cnt, pq_coefs,

						     len, flags);

		}



		if (!tx) {

			unmap_src(dev->dev, dma_srcs, len, src_cnt);

			unmap_dst(dev->dev, dma_dsts, params->buf_size,

				  dst_cnt);

			dmaengine_unmap_put(um);

			result("prep error", total_tests, src_off,

			       dst_off, len, ret);

			msleep(100);
@@ -598,6 +599,7 @@ static int dmatest_func(void *data) 
		cookie = tx->tx_submit(tx);



		if (dma_submit_error(cookie)) {

			dmaengine_unmap_put(um);

			result("submit error", total_tests, src_off,

			       dst_off, len, ret);

			msleep(100);
@@ -620,11 +622,13 @@ static int dmatest_func(void *data) 
			 * free it this time?" dancing.  For now, just

			 * leave it dangling.

			 */

			dmaengine_unmap_put(um);

			result("test timed out", total_tests, src_off, dst_off,

			       len, 0);

			failed_tests++;

			continue;

		} else if (status != DMA_SUCCESS) {

			dmaengine_unmap_put(um);

			result(status == DMA_ERROR ?

			       "completion error status" :

			       "completion busy status", total_tests, src_off,
@@ -633,9 +637,7 @@ static int dmatest_func(void *data) 
			continue;

		}



		/* Unmap by myself */

		unmap_src(dev->dev, dma_srcs, len, src_cnt);

		unmap_dst(dev->dev, dma_dsts, params->buf_size, dst_cnt);

		dmaengine_unmap_put(um);



		if (params->noverify) {

			dbg_result("test passed", total_tests, src_off, dst_off,