[dpdk-dev] [PATCH v3 7/8] app/test: add dmadev fill tests

[Bruce Richardson <bruce.richardson@intel.com>]

From: Kevin Laatz <kevin.laatz@intel.com>

For dma devices which support the fill operation, run unit tests to
verify fill behaviour is correct.

Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Conor Walsh <conor.walsh@intel.com>
---
 app/test/test_dmadev.c | 49 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/app/test/test_dmadev.c b/app/test/test_dmadev.c
index 35ba1ff45d..9ad865f249 100644
--- a/app/test/test_dmadev.c
+++ b/app/test/test_dmadev.c
@@ -624,7 +624,51 @@ test_completion_handling(int dev_id, uint16_t vchan)
 {
 	return test_completion_status(dev_id, vchan, false)              /* without fences */
 			|| test_completion_status(dev_id, vchan, true);  /* with fences */
+}
+
+static int
+test_enqueue_fill(int dev_id, uint16_t vchan)
+{
+	const unsigned int lengths[] = {8, 64, 1024, 50, 100, 89};
+	struct rte_mbuf *dst;
+	char *dst_data;
+	uint64_t pattern = 0xfedcba9876543210;
+	unsigned int i, j;
+
+	dst = rte_pktmbuf_alloc(pool);
+	if (dst == NULL)
+		ERR_RETURN("Failed to allocate mbuf\n");
+	dst_data = rte_pktmbuf_mtod(dst, char *);
+
+	for (i = 0; i < RTE_DIM(lengths); i++) {
+		/* reset dst_data */
+		memset(dst_data, 0, rte_pktmbuf_data_len(dst));
+
+		/* perform the fill operation */
+		int id = rte_dmadev_fill(dev_id, vchan, pattern,
+				rte_pktmbuf_iova(dst), lengths[i], RTE_DMA_OP_FLAG_SUBMIT);
+		if (id < 0)
+			ERR_RETURN("Error with rte_ioat_enqueue_fill\n");
+		await_hw(dev_id, vchan);
+
+		if (rte_dmadev_completed(dev_id, vchan, 1, NULL, NULL) != 1)
+			ERR_RETURN("Error: fill operation failed (length: %u)\n", lengths[i]);
+		/* check the data from the fill operation is correct */
+		for (j = 0; j < lengths[i]; j++) {
+			char pat_byte = ((char *)&pattern)[j % 8];
+			if (dst_data[j] != pat_byte)
+				ERR_RETURN("Error with fill operation (lengths = %u): got (%x), not (%x)\n",
+						lengths[i], dst_data[j], pat_byte);
+		}
+		/* check that the data after the fill operation was not written to */
+		for (; j < rte_pktmbuf_data_len(dst); j++)
+			if (dst_data[j] != 0)
+				ERR_RETURN("Error, fill operation wrote too far (lengths = %u): got (%x), not (%x)\n",
+						lengths[i], dst_data[j], 0);
+	}
 
+	rte_pktmbuf_free(dst);
+	return 0;
 }
 
 static int
@@ -692,6 +736,11 @@ test_dmadev_instance(uint16_t dev_id)
 			dev_id, vchan, !CHECK_ERRS) < 0)
 		goto err;
 
+	if ((info.dev_capa & RTE_DMADEV_CAPA_OPS_FILL) == 0)
+		printf("DMA Dev %u: No device fill support, skipping fill tests\n", dev_id);
+	else if (runtest("fill", test_enqueue_fill, 1, dev_id, vchan, CHECK_ERRS) < 0)
+		goto err;
+
 	rte_mempool_free(pool);
 	rte_dmadev_stop(dev_id);
 	rte_dmadev_stats_reset(dev_id, vchan);
-- 
2.30.2