dmaengine: dmatest: Add support for scatter-gather DMA mode

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

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 2269dc0f9dec92dbf0748d5756dc843a502e91e4..6606d6651edd1823e64cf29f993c32f657e78305 100644 (file)
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -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++;
 
@@ -579,10 +593,22 @@ 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,
@@ -750,6 +776,8 @@ 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)
@@ -804,9 +832,19 @@ static int dmatest_add_channel(struct dmatest_info *info,
        INIT_LIST_HEAD(&dtc->threads);
 
        if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
-               cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY);
-               thread_count += cnt > 0 ? cnt : 0;
+               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;
@@ -879,6 +917,7 @@ 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);
 }