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Commit a0d4cb44 authored by Kedareswara rao Appana's avatar Kedareswara rao Appana Committed by Vinod Koul
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dmaengine: dmatest: Add support for scatter-gather DMA mode 



This patch updates the dmatest client to
Support scatter-gather dma mode.

Signed-off-by: default avatarKedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent ad31aa8f

drivers/dma/dmatest.c

+41 −2
Original line number Diff line number Diff line
@@ -51,6 +51,16 @@ module_param(iterations, uint, S_IRUGO | S_IWUSR); 
MODULE_PARM_DESC(iterations,

		"Iterations before stopping test (default: infinite)");



static unsigned int sg_buffers = 1;

module_param(sg_buffers, uint, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(sg_buffers,

		"Number of scatter gather buffers (default: 1)");



static unsigned int dmatest = 1;

module_param(dmatest, uint, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(dmatest,

		"dmatest 0-memcpy 1-slave_sg (default: 1)");



static unsigned int xor_sources = 3;

module_param(xor_sources, uint, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(xor_sources,
@@ -431,6 +441,8 @@ static int dmatest_func(void *data) 
	dev = chan->device;

	if (thread->type == DMA_MEMCPY)

		src_cnt = dst_cnt = 1;

	else if (thread->type == DMA_SG)

		src_cnt = dst_cnt = sg_buffers;

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

		/* force odd to ensure dst = src */

		src_cnt = min_odd(params->xor_sources | 1, dev->max_xor);
@@ -485,6 +497,8 @@ static int dmatest_func(void *data) 
		dma_addr_t *dsts;

		unsigned int src_off, dst_off, len;

		u8 align = 0;

		struct scatterlist tx_sg[src_cnt];

		struct scatterlist rx_sg[src_cnt];



		total_tests++;
@@ -577,10 +591,22 @@ static int dmatest_func(void *data) 
			um->bidi_cnt++;

		}



		sg_init_table(tx_sg, src_cnt);

		sg_init_table(rx_sg, src_cnt);

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

			sg_dma_address(&rx_sg[i]) = srcs[i];

			sg_dma_address(&tx_sg[i]) = dsts[i] + dst_off;

			sg_dma_len(&tx_sg[i]) = len;

			sg_dma_len(&rx_sg[i]) = len;

		}



		if (thread->type == DMA_MEMCPY)

			tx = dev->device_prep_dma_memcpy(chan,

							 dsts[0] + dst_off,

							 srcs[0], len, flags);

		else if (thread->type == DMA_SG)

			tx = dev->device_prep_dma_sg(chan, tx_sg, src_cnt,

						     rx_sg, src_cnt, flags);

		else if (thread->type == DMA_XOR)

			tx = dev->device_prep_dma_xor(chan,

						      dsts[0] + dst_off,
@@ -748,6 +774,8 @@ static int dmatest_add_threads(struct dmatest_info *info, 


	if (type == DMA_MEMCPY)

		op = "copy";

	else if (type == DMA_SG)

		op = "sg";

	else if (type == DMA_XOR)

		op = "xor";

	else if (type == DMA_PQ)
@@ -802,9 +830,19 @@ static int dmatest_add_channel(struct dmatest_info *info, 
	INIT_LIST_HEAD(&dtc->threads);



	if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {

		if (dmatest == 0) {

			cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY);

			thread_count += cnt > 0 ? cnt : 0;

		}

	}



	if (dma_has_cap(DMA_SG, dma_dev->cap_mask)) {

		if (dmatest == 1) {

			cnt = dmatest_add_threads(info, dtc, DMA_SG);

			thread_count += cnt > 0 ? cnt : 0;

		}

	}



	if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {

		cnt = dmatest_add_threads(info, dtc, DMA_XOR);

		thread_count += cnt > 0 ? cnt : 0;
@@ -877,6 +915,7 @@ static void run_threaded_test(struct dmatest_info *info) 


	request_channels(info, DMA_MEMCPY);

	request_channels(info, DMA_XOR);

	request_channels(info, DMA_SG);

	request_channels(info, DMA_PQ);

}