[dpdk-dev] [PATCH v2 6/6] 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>
---
 app/test/test_dmadev.c | 73 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)

diff --git a/app/test/test_dmadev.c b/app/test/test_dmadev.c
index 5d7b6ddd87..c44c3ad9db 100644
--- a/app/test/test_dmadev.c
+++ b/app/test/test_dmadev.c
@@ -710,6 +710,62 @@ test_completion_status(int dev_id, uint16_t vchan, bool fence)
 	return 0;
 }
 
+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) {
+		PRINT_ERR("Failed to allocate mbuf\n");
+		return -1;
+	}
+	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) {
+			PRINT_ERR("Error with rte_ioat_enqueue_fill\n");
+			return -1;
+		}
+		await_hw(dev_id, vchan);
+
+		if (rte_dmadev_completed(dev_id, vchan, 1, NULL, NULL) != 1) {
+			PRINT_ERR("Error: fill operation failed (length: %u)\n", lengths[i]);
+			return -1;
+		}
+		/* 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) {
+				PRINT_ERR("Error with fill operation (lengths = %u): got (%x), not (%x)\n",
+						lengths[i], dst_data[j], pat_byte);
+				return -1;
+			}
+		}
+		/* 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) {
+				PRINT_ERR("Error, fill operation wrote too far (lengths = %u): got (%x), not (%x)\n",
+						lengths[i], dst_data[j], 0);
+				return -1;
+			}
+		}
+	}
+
+	rte_pktmbuf_free(dst);
+	return 0;
+}
+
 static int
 test_dmadev_instance(uint16_t dev_id)
 {
@@ -813,6 +869,23 @@ test_dmadev_instance(uint16_t dev_id)
 			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 {
+		rte_dmadev_stats_reset(dev_id, vchan);
+		printf("DMA Dev: %u, Running Fill Tests\n", dev_id);
+
+		if (test_enqueue_fill(dev_id, vchan) != 0)
+			goto err;
+
+		rte_dmadev_stats_get(dev_id, 0, &stats);
+		printf("Ops submitted: %"PRIu64"\t", stats.submitted);
+		printf("Ops completed: %"PRIu64"\t", stats.completed);
+		printf("Errors: %"PRIu64"\n", stats.errors);
+		if (check_stats(&stats, true) < 0)
+			goto err;
+	}
+
 	rte_mempool_free(pool);
 	rte_dmadev_stop(dev_id);
 	rte_dmadev_stats_reset(dev_id, vchan);
-- 
2.30.2