/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2021 HiSilicon Limited
 * Copyright(c) 2021 Intel Corporation
 */

#include <inttypes.h>

#include <rte_dmadev.h>
#include <rte_mbuf.h>
#include <rte_pause.h>
#include <rte_cycles.h>
#include <rte_random.h>
#include <rte_bus_vdev.h>
#include <rte_dmadev_pmd.h>

#include "test.h"
#include "test_dmadev_api.h"

#define ERR_RETURN(...) do { print_err(__func__, __LINE__, __VA_ARGS__); return -1; } while (0)

#define COPY_LEN 1024

static struct rte_mempool *pool;
static uint16_t id_count;

static void
__rte_format_printf(3, 4)
print_err(const char *func, int lineno, const char *format, ...)
{
	va_list ap;

	fprintf(stderr, "In %s:%d - ", func, lineno);
	va_start(ap, format);
	vfprintf(stderr, format, ap);
	va_end(ap);
}

static int
runtest(const char *printable, int (*test_fn)(int16_t dev_id, uint16_t vchan), int iterations,
		int16_t dev_id, uint16_t vchan, bool check_err_stats)
{
	struct rte_dma_stats stats;
	int i;

	rte_dma_stats_reset(dev_id, vchan);
	printf("DMA Dev %d: Running %s Tests %s\n", dev_id, printable,
			check_err_stats ? " " : "(errors expected)");
	for (i = 0; i < iterations; i++) {
		if (test_fn(dev_id, vchan) < 0)
			return -1;

		rte_dma_stats_get(dev_id, 0, &stats);
		printf("Ops submitted: %"PRIu64"\t", stats.submitted);
		printf("Ops completed: %"PRIu64"\t", stats.completed);
		printf("Errors: %"PRIu64"\r", stats.errors);

		if (stats.completed != stats.submitted)
			ERR_RETURN("\nError, not all submitted jobs are reported as completed\n");
		if (check_err_stats && stats.errors != 0)
			ERR_RETURN("\nErrors reported during op processing, aborting tests\n");
	}
	printf("\n");
	return 0;
}

static void
await_hw(int16_t dev_id, uint16_t vchan)
{
	enum rte_dma_vchan_status st;

	if (rte_dma_vchan_status(dev_id, vchan, &st) < 0) {
		/* for drivers that don't support this op, just sleep for 1 millisecond */
		rte_delay_us_sleep(1000);
		return;
	}

	/* for those that do, *max* end time is one second from now, but all should be faster */
	const uint64_t end_cycles = rte_get_timer_cycles() + rte_get_timer_hz();
	while (st == RTE_DMA_VCHAN_ACTIVE && rte_get_timer_cycles() < end_cycles) {
		rte_pause();
		rte_dma_vchan_status(dev_id, vchan, &st);
	}
}

/* run a series of copy tests just using some different options for enqueues and completions */
static int
do_multi_copies(int16_t dev_id, uint16_t vchan,
		int split_batches,     /* submit 2 x 16 or 1 x 32 burst */
		int split_completions, /* gather 2 x 16 or 1 x 32 completions */
		int use_completed_status) /* use completed or completed_status function */
{
	struct rte_mbuf *srcs[32], *dsts[32];
	enum rte_dma_status_code sc[32];
	unsigned int i, j;
	bool dma_err = false;

	/* Enqueue burst of copies and hit doorbell */
	for (i = 0; i < RTE_DIM(srcs); i++) {
		uint64_t *src_data;

		if (split_batches && i == RTE_DIM(srcs) / 2)
			rte_dma_submit(dev_id, vchan);

		srcs[i] = rte_pktmbuf_alloc(pool);
		dsts[i] = rte_pktmbuf_alloc(pool);
		if (srcs[i] == NULL || dsts[i] == NULL)
			ERR_RETURN("Error allocating buffers\n");

		src_data = rte_pktmbuf_mtod(srcs[i], uint64_t *);
		for (j = 0; j < COPY_LEN/sizeof(uint64_t); j++)
			src_data[j] = rte_rand();

		if (rte_dma_copy(dev_id, vchan, rte_mbuf_data_iova(srcs[i]),
				 rte_mbuf_data_iova(dsts[i]), COPY_LEN, 0) != id_count++)
			ERR_RETURN("Error with rte_dma_copy for buffer %u\n", i);
	}
	rte_dma_submit(dev_id, vchan);

	await_hw(dev_id, vchan);

	if (split_completions) {
		/* gather completions in two halves */
		uint16_t half_len = RTE_DIM(srcs) / 2;
		int ret = rte_dma_completed(dev_id, vchan, half_len, NULL, &dma_err);
		if (ret != half_len || dma_err)
			ERR_RETURN("Error with rte_dma_completed - first half. ret = %d, expected ret = %u, dma_err = %d\n",
					ret, half_len, dma_err);

		ret = rte_dma_completed(dev_id, vchan, half_len, NULL, &dma_err);
		if (ret != half_len || dma_err)
			ERR_RETURN("Error with rte_dma_completed - second half. ret = %d, expected ret = %u, dma_err = %d\n",
					ret, half_len, dma_err);
	} else {
		/* gather all completions in one go, using either
		 * completed or completed_status fns
		 */
		if (!use_completed_status) {
			int n = rte_dma_completed(dev_id, vchan, RTE_DIM(srcs), NULL, &dma_err);
			if (n != RTE_DIM(srcs) || dma_err)
				ERR_RETURN("Error with rte_dma_completed, %u [expected: %zu], dma_err = %d\n",
						n, RTE_DIM(srcs), dma_err);
		} else {
			int n = rte_dma_completed_status(dev_id, vchan, RTE_DIM(srcs), NULL, sc);
			if (n != RTE_DIM(srcs))
				ERR_RETURN("Error with rte_dma_completed_status, %u [expected: %zu]\n",
						n, RTE_DIM(srcs));

			for (j = 0; j < (uint16_t)n; j++)
				if (sc[j] != RTE_DMA_STATUS_SUCCESSFUL)
					ERR_RETURN("Error with rte_dma_completed_status, job %u reports failure [code %u]\n",
							j, sc[j]);
		}
	}

	/* check for empty */
	int ret = use_completed_status ?
			rte_dma_completed_status(dev_id, vchan, RTE_DIM(srcs), NULL, sc) :
			rte_dma_completed(dev_id, vchan, RTE_DIM(srcs), NULL, &dma_err);
	if (ret != 0)
		ERR_RETURN("Error with completion check - ops unexpectedly returned\n");

	for (i = 0; i < RTE_DIM(srcs); i++) {
		char *src_data, *dst_data;

		src_data = rte_pktmbuf_mtod(srcs[i], char *);
		dst_data = rte_pktmbuf_mtod(dsts[i], char *);
		for (j = 0; j < COPY_LEN; j++)
			if (src_data[j] != dst_data[j])
				ERR_RETURN("Error with copy of packet %u, byte %u\n", i, j);

		rte_pktmbuf_free(srcs[i]);
		rte_pktmbuf_free(dsts[i]);
	}
	return 0;
}

static int
test_enqueue_copies(int16_t dev_id, uint16_t vchan)
{
	enum rte_dma_status_code status;
	unsigned int i;
	uint16_t id;

	/* test doing a single copy */
	do {
		struct rte_mbuf *src, *dst;
		char *src_data, *dst_data;

		src = rte_pktmbuf_alloc(pool);
		dst = rte_pktmbuf_alloc(pool);
		src_data = rte_pktmbuf_mtod(src, char *);
		dst_data = rte_pktmbuf_mtod(dst, char *);

		for (i = 0; i < COPY_LEN; i++)
			src_data[i] = rte_rand() & 0xFF;

		id = rte_dma_copy(dev_id, vchan, rte_pktmbuf_iova(src), rte_pktmbuf_iova(dst),
				COPY_LEN, RTE_DMA_OP_FLAG_SUBMIT);
		if (id != id_count)
			ERR_RETURN("Error with rte_dma_copy, got %u, expected %u\n",
					id, id_count);

		/* give time for copy to finish, then check it was done */
		await_hw(dev_id, vchan);

		for (i = 0; i < COPY_LEN; i++)
			if (dst_data[i] != src_data[i])
				ERR_RETURN("Data mismatch at char %u [Got %02x not %02x]\n", i,
						dst_data[i], src_data[i]);

		/* now check completion works */
		id = ~id;
		if (rte_dma_completed(dev_id, vchan, 1, &id, NULL) != 1)
			ERR_RETURN("Error with rte_dma_completed\n");

		if (id != id_count)
			ERR_RETURN("Error:incorrect job id received, %u [expected %u]\n",
					id, id_count);

		/* check for completed and id when no job done */
		id = ~id;
		if (rte_dma_completed(dev_id, vchan, 1, &id, NULL) != 0)
			ERR_RETURN("Error with rte_dma_completed when no job done\n");
		if (id != id_count)
			ERR_RETURN("Error:incorrect job id received when no job done, %u [expected %u]\n",
					id, id_count);

		/* check for completed_status and id when no job done */
		id = ~id;
		if (rte_dma_completed_status(dev_id, vchan, 1, &id, &status) != 0)
			ERR_RETURN("Error with rte_dma_completed_status when no job done\n");
		if (id != id_count)
			ERR_RETURN("Error:incorrect job id received when no job done, %u [expected %u]\n",
					id, id_count);

		rte_pktmbuf_free(src);
		rte_pktmbuf_free(dst);

		/* now check completion returns nothing more */
		if (rte_dma_completed(dev_id, 0, 1, NULL, NULL) != 0)
			ERR_RETURN("Error with rte_dma_completed in empty check\n");

		id_count++;

	} while (0);

	/* test doing a multiple single copies */
	do {
		const uint16_t max_ops = 4;
		struct rte_mbuf *src, *dst;
		char *src_data, *dst_data;
		uint16_t count;

		src = rte_pktmbuf_alloc(pool);
		dst = rte_pktmbuf_alloc(pool);
		src_data = rte_pktmbuf_mtod(src, char *);
		dst_data = rte_pktmbuf_mtod(dst, char *);

		for (i = 0; i < COPY_LEN; i++)
			src_data[i] = rte_rand() & 0xFF;

		/* perform the same copy <max_ops> times */
		for (i = 0; i < max_ops; i++)
			if (rte_dma_copy(dev_id, vchan,
					rte_pktmbuf_iova(src),
					rte_pktmbuf_iova(dst),
					COPY_LEN, RTE_DMA_OP_FLAG_SUBMIT) != id_count++)
				ERR_RETURN("Error with rte_dma_copy\n");

		await_hw(dev_id, vchan);

		count = rte_dma_completed(dev_id, vchan, max_ops * 2, &id, NULL);
		if (count != max_ops)
			ERR_RETURN("Error with rte_dma_completed, got %u not %u\n",
					count, max_ops);

		if (id != id_count - 1)
			ERR_RETURN("Error, incorrect job id returned: got %u not %u\n",
					id, id_count - 1);

		for (i = 0; i < COPY_LEN; i++)
			if (dst_data[i] != src_data[i])
				ERR_RETURN("Data mismatch at char %u\n", i);

		rte_pktmbuf_free(src);
		rte_pktmbuf_free(dst);
	} while (0);

	/* test doing multiple copies */
	return do_multi_copies(dev_id, vchan, 0, 0, 0) /* enqueue and complete 1 batch at a time */
			/* enqueue 2 batches and then complete both */
			|| do_multi_copies(dev_id, vchan, 1, 0, 0)
			/* enqueue 1 batch, then complete in two halves */
			|| do_multi_copies(dev_id, vchan, 0, 1, 0)
			/* test using completed_status in place of regular completed API */
			|| do_multi_copies(dev_id, vchan, 0, 0, 1);
}

/* Failure handling test cases - global macros and variables for those tests*/
#define COMP_BURST_SZ	16
#define OPT_FENCE(idx) ((fence && idx == 8) ? RTE_DMA_OP_FLAG_FENCE : 0)

static int
test_failure_in_full_burst(int16_t dev_id, uint16_t vchan, bool fence,
		struct rte_mbuf **srcs, struct rte_mbuf **dsts, unsigned int fail_idx)
{
	/* Test single full batch statuses with failures */
	enum rte_dma_status_code status[COMP_BURST_SZ];
	struct rte_dma_stats baseline, stats;
	uint16_t invalid_addr_id = 0;
	uint16_t idx;
	uint16_t count, status_count;
	unsigned int i;
	bool error = false;
	int err_count = 0;

	rte_dma_stats_get(dev_id, vchan, &baseline); /* get a baseline set of stats */
	for (i = 0; i < COMP_BURST_SZ; i++) {
		int id = rte_dma_copy(dev_id, vchan,
				      (i == fail_idx ? 0 : rte_mbuf_data_iova(srcs[i])),
				      rte_mbuf_data_iova(dsts[i]), COPY_LEN, OPT_FENCE(i));
		if (id < 0)
			ERR_RETURN("Error with rte_dma_copy for buffer %u\n", i);
		if (i == fail_idx)
			invalid_addr_id = id;
	}
	rte_dma_submit(dev_id, vchan);
	rte_dma_stats_get(dev_id, vchan, &stats);
	if (stats.submitted != baseline.submitted + COMP_BURST_SZ)
		ERR_RETURN("Submitted stats value not as expected, %"PRIu64" not %"PRIu64"\n",
				stats.submitted, baseline.submitted + COMP_BURST_SZ);

	await_hw(dev_id, vchan);

	count = rte_dma_completed(dev_id, vchan, COMP_BURST_SZ, &idx, &error);
	if (count != fail_idx)
		ERR_RETURN("Error with rte_dma_completed for failure test. Got returned %u not %u.\n",
				count, fail_idx);
	if (!error)
		ERR_RETURN("Error, missing expected failed copy, %u. has_error is not set\n",
				fail_idx);
	if (idx != invalid_addr_id - 1)
		ERR_RETURN("Error, missing expected failed copy, %u. Got last idx %u, not %u\n",
				fail_idx, idx, invalid_addr_id - 1);

	/* all checks ok, now verify calling completed() again always returns 0 */
	for (i = 0; i < 10; i++)
		if (rte_dma_completed(dev_id, vchan, COMP_BURST_SZ, &idx, &error) != 0
				|| error == false || idx != (invalid_addr_id - 1))
			ERR_RETURN("Error with follow-up completed calls for fail idx %u\n",
					fail_idx);

	status_count = rte_dma_completed_status(dev_id, vchan, COMP_BURST_SZ,
			&idx, status);
	/* some HW may stop on error and be restarted after getting error status for single value
	 * To handle this case, if we get just one error back, wait for more completions and get
	 * status for rest of the burst
	 */
	if (status_count == 1) {
		await_hw(dev_id, vchan);
		status_count += rte_dma_completed_status(dev_id, vchan, COMP_BURST_SZ - 1,
					&idx, &status[1]);
	}
	/* check that at this point we have all status values */
	if (status_count != COMP_BURST_SZ - count)
		ERR_RETURN("Error with completed_status calls for fail idx %u. Got %u not %u\n",
				fail_idx, status_count, COMP_BURST_SZ - count);
	/* now verify just one failure followed by multiple successful or skipped entries */
	if (status[0] == RTE_DMA_STATUS_SUCCESSFUL)
		ERR_RETURN("Error with status returned for fail idx %u. First status was not failure\n",
				fail_idx);
	for (i = 1; i < status_count; i++)
		/* after a failure in a burst, depending on ordering/fencing,
		 * operations may be successful or skipped because of previous error.
		 */
		if (status[i] != RTE_DMA_STATUS_SUCCESSFUL
				&& status[i] != RTE_DMA_STATUS_NOT_ATTEMPTED)
			ERR_RETURN("Error with status calls for fail idx %u. Status for job %u (of %u) is not successful\n",
					fail_idx, count + i, COMP_BURST_SZ);

	/* check the completed + errors stats are as expected */
	rte_dma_stats_get(dev_id, vchan, &stats);
	if (stats.completed != baseline.completed + COMP_BURST_SZ)
		ERR_RETURN("Completed stats value not as expected, %"PRIu64" not %"PRIu64"\n",
				stats.completed, baseline.completed + COMP_BURST_SZ);
	for (i = 0; i < status_count; i++)
		err_count += (status[i] != RTE_DMA_STATUS_SUCCESSFUL);
	if (stats.errors != baseline.errors + err_count)
		ERR_RETURN("'Errors' stats value not as expected, %"PRIu64" not %"PRIu64"\n",
				stats.errors, baseline.errors + err_count);

	return 0;
}

static int
test_individual_status_query_with_failure(int16_t dev_id, uint16_t vchan, bool fence,
		struct rte_mbuf **srcs, struct rte_mbuf **dsts, unsigned int fail_idx)
{
	/* Test gathering batch statuses one at a time */
	enum rte_dma_status_code status[COMP_BURST_SZ];
	uint16_t invalid_addr_id = 0;
	uint16_t idx;
	uint16_t count = 0, status_count = 0;
	unsigned int j;
	bool error = false;

	for (j = 0; j < COMP_BURST_SZ; j++) {
		int id = rte_dma_copy(dev_id, vchan,
				      (j == fail_idx ? 0 : rte_mbuf_data_iova(srcs[j])),
				      rte_mbuf_data_iova(dsts[j]), COPY_LEN, OPT_FENCE(j));
		if (id < 0)
			ERR_RETURN("Error with rte_dma_copy for buffer %u\n", j);
		if (j == fail_idx)
			invalid_addr_id = id;
	}
	rte_dma_submit(dev_id, vchan);
	await_hw(dev_id, vchan);

	/* use regular "completed" until we hit error */
	while (!error) {
		uint16_t n = rte_dma_completed(dev_id, vchan, 1, &idx, &error);
		count += n;
		if (n > 1 || count >= COMP_BURST_SZ)
			ERR_RETURN("Error - too many completions got\n");
		if (n == 0 && !error)
			ERR_RETURN("Error, unexpectedly got zero completions after %u completed\n",
					count);
	}
	if (idx != invalid_addr_id - 1)
		ERR_RETURN("Error, last successful index not as expected, got %u, expected %u\n",
				idx, invalid_addr_id - 1);

	/* use completed_status until we hit end of burst */
	while (count + status_count < COMP_BURST_SZ) {
		uint16_t n = rte_dma_completed_status(dev_id, vchan, 1, &idx,
				&status[status_count]);
		await_hw(dev_id, vchan); /* allow delay to ensure jobs are completed */
		status_count += n;
		if (n != 1)
			ERR_RETURN("Error: unexpected number of completions received, %u, not 1\n",
					n);
	}

	/* check for single failure */
	if (status[0] == RTE_DMA_STATUS_SUCCESSFUL)
		ERR_RETURN("Error, unexpected successful DMA transaction\n");
	for (j = 1; j < status_count; j++)
		if (status[j] != RTE_DMA_STATUS_SUCCESSFUL
				&& status[j] != RTE_DMA_STATUS_NOT_ATTEMPTED)
			ERR_RETURN("Error, unexpected DMA error reported\n");

	return 0;
}

static int
test_single_item_status_query_with_failure(int16_t dev_id, uint16_t vchan,
		struct rte_mbuf **srcs, struct rte_mbuf **dsts, unsigned int fail_idx)
{
	/* When error occurs just collect a single error using "completed_status()"
	 * before going to back to completed() calls
	 */
	enum rte_dma_status_code status;
	uint16_t invalid_addr_id = 0;
	uint16_t idx;
	uint16_t count, status_count, count2;
	unsigned int j;
	bool error = false;

	for (j = 0; j < COMP_BURST_SZ; j++) {
		int id = rte_dma_copy(dev_id, vchan,
				      (j == fail_idx ? 0 : rte_mbuf_data_iova(srcs[j])),
				      rte_mbuf_data_iova(dsts[j]), COPY_LEN, 0);
		if (id < 0)
			ERR_RETURN("Error with rte_dma_copy for buffer %u\n", j);
		if (j == fail_idx)
			invalid_addr_id = id;
	}
	rte_dma_submit(dev_id, vchan);
	await_hw(dev_id, vchan);

	/* get up to the error point */
	count = rte_dma_completed(dev_id, vchan, COMP_BURST_SZ, &idx, &error);
	if (count != fail_idx)
		ERR_RETURN("Error with rte_dma_completed for failure test. Got returned %u not %u.\n",
				count, fail_idx);
	if (!error)
		ERR_RETURN("Error, missing expected failed copy, %u. has_error is not set\n",
				fail_idx);
	if (idx != invalid_addr_id - 1)
		ERR_RETURN("Error, missing expected failed copy, %u. Got last idx %u, not %u\n",
				fail_idx, idx, invalid_addr_id - 1);

	/* get the error code */
	status_count = rte_dma_completed_status(dev_id, vchan, 1, &idx, &status);
	if (status_count != 1)
		ERR_RETURN("Error with completed_status calls for fail idx %u. Got %u not %u\n",
				fail_idx, status_count, COMP_BURST_SZ - count);
	if (status == RTE_DMA_STATUS_SUCCESSFUL)
		ERR_RETURN("Error with status returned for fail idx %u. First status was not failure\n",
				fail_idx);

	/* delay in case time needed after err handled to complete other jobs */
	await_hw(dev_id, vchan);

	/* get the rest of the completions without status */
	count2 = rte_dma_completed(dev_id, vchan, COMP_BURST_SZ, &idx, &error);
	if (error == true)
		ERR_RETURN("Error, got further errors post completed_status() call, for failure case %u.\n",
				fail_idx);
	if (count + status_count + count2 != COMP_BURST_SZ)
		ERR_RETURN("Error, incorrect number of completions received, got %u not %u\n",
				count + status_count + count2, COMP_BURST_SZ);

	return 0;
}

static int
test_multi_failure(int16_t dev_id, uint16_t vchan, struct rte_mbuf **srcs, struct rte_mbuf **dsts,
		const unsigned int *fail, size_t num_fail)
{
	/* test having multiple errors in one go */
	enum rte_dma_status_code status[COMP_BURST_SZ];
	unsigned int i, j;
	uint16_t count, err_count = 0;
	bool error = false;

	/* enqueue and gather completions in one go */
	for (j = 0; j < COMP_BURST_SZ; j++) {
		uintptr_t src = rte_mbuf_data_iova(srcs[j]);
		/* set up for failure if the current index is anywhere is the fails array */
		for (i = 0; i < num_fail; i++)
			if (j == fail[i])
				src = 0;

		int id = rte_dma_copy(dev_id, vchan, src, rte_mbuf_data_iova(dsts[j]),
				      COPY_LEN, 0);
		if (id < 0)
			ERR_RETURN("Error with rte_dma_copy for buffer %u\n", j);
	}
	rte_dma_submit(dev_id, vchan);
	await_hw(dev_id, vchan);

	count = rte_dma_completed_status(dev_id, vchan, COMP_BURST_SZ, NULL, status);
	while (count < COMP_BURST_SZ) {
		await_hw(dev_id, vchan);

		uint16_t ret = rte_dma_completed_status(dev_id, vchan, COMP_BURST_SZ - count,
				NULL, &status[count]);
		if (ret == 0)
			ERR_RETURN("Error getting all completions for jobs. Got %u of %u\n",
					count, COMP_BURST_SZ);
		count += ret;
	}
	for (i = 0; i < count; i++)
		if (status[i] != RTE_DMA_STATUS_SUCCESSFUL)
			err_count++;

	if (err_count != num_fail)
		ERR_RETURN("Error: Invalid number of failed completions returned, %u; expected %zu\n",
			err_count, num_fail);

	/* enqueue and gather completions in bursts, but getting errors one at a time */
	for (j = 0; j < COMP_BURST_SZ; j++) {
		uintptr_t src = rte_mbuf_data_iova(srcs[j]);
		/* set up for failure if the current index is anywhere is the fails array */
		for (i = 0; i < num_fail; i++)
			if (j == fail[i])
				src = 0;

		int id = rte_dma_copy(dev_id, vchan, src, rte_mbuf_data_iova(dsts[j]),
				      COPY_LEN, 0);
		if (id < 0)
			ERR_RETURN("Error with rte_dma_copy for buffer %u\n", j);
	}
	rte_dma_submit(dev_id, vchan);
	await_hw(dev_id, vchan);

	count = 0;
	err_count = 0;
	while (count + err_count < COMP_BURST_SZ) {
		count += rte_dma_completed(dev_id, vchan, COMP_BURST_SZ, NULL, &error);
		if (error) {
			uint16_t ret = rte_dma_completed_status(dev_id, vchan, 1,
					NULL, status);
			if (ret != 1)
				ERR_RETURN("Error getting error-status for completions\n");
			err_count += ret;
			await_hw(dev_id, vchan);
		}
	}
	if (err_count != num_fail)
		ERR_RETURN("Error: Incorrect number of failed completions received, got %u not %zu\n",
				err_count, num_fail);

	return 0;
}

static int
test_completion_status(int16_t dev_id, uint16_t vchan, bool fence)
{
	const unsigned int fail[] = {0, 7, 14, 15};
	struct rte_mbuf *srcs[COMP_BURST_SZ], *dsts[COMP_BURST_SZ];
	unsigned int i;

	for (i = 0; i < COMP_BURST_SZ; i++) {
		srcs[i] = rte_pktmbuf_alloc(pool);
		dsts[i] = rte_pktmbuf_alloc(pool);
	}

	for (i = 0; i < RTE_DIM(fail); i++) {
		if (test_failure_in_full_burst(dev_id, vchan, fence, srcs, dsts, fail[i]) < 0)
			return -1;

		if (test_individual_status_query_with_failure(dev_id, vchan, fence,
				srcs, dsts, fail[i]) < 0)
			return -1;

		/* test is run the same fenced, or unfenced, but no harm in running it twice */
		if (test_single_item_status_query_with_failure(dev_id, vchan,
				srcs, dsts, fail[i]) < 0)
			return -1;
	}

	if (test_multi_failure(dev_id, vchan, srcs, dsts, fail, RTE_DIM(fail)) < 0)
		return -1;

	for (i = 0; i < COMP_BURST_SZ; i++) {
		rte_pktmbuf_free(srcs[i]);
		rte_pktmbuf_free(dsts[i]);
	}
	return 0;
}

static int
test_completion_handling(int16_t 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(int16_t 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_dma_fill(dev_id, vchan, pattern,
				rte_pktmbuf_iova(dst), lengths[i], RTE_DMA_OP_FLAG_SUBMIT);
		if (id < 0)
			ERR_RETURN("Error with rte_dma_fill\n");
		await_hw(dev_id, vchan);

		if (rte_dma_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
test_burst_capacity(int16_t dev_id, uint16_t vchan)
{
#define CAP_TEST_BURST_SIZE	64
	const int ring_space = rte_dma_burst_capacity(dev_id, vchan);
	struct rte_mbuf *src, *dst;
	int i, j, iter;
	int cap, ret;
	bool dma_err;

	src = rte_pktmbuf_alloc(pool);
	dst = rte_pktmbuf_alloc(pool);

	/* to test capacity, we enqueue elements and check capacity is reduced
	 * by one each time - rebaselining the expected value after each burst
	 * as the capacity is only for a burst. We enqueue multiple bursts to
	 * fill up half the ring, before emptying it again. We do this multiple
	 * times to ensure that we get to test scenarios where we get ring
	 * wrap-around and wrap-around of the ids returned (at UINT16_MAX).
	 */
	for (iter = 0; iter < 2 * (((int)UINT16_MAX + 1) / ring_space); iter++) {
		for (i = 0; i < (ring_space / (2 * CAP_TEST_BURST_SIZE)) + 1; i++) {
			cap = rte_dma_burst_capacity(dev_id, vchan);

			for (j = 0; j < CAP_TEST_BURST_SIZE; j++) {
				ret = rte_dma_copy(dev_id, vchan, rte_pktmbuf_iova(src),
						rte_pktmbuf_iova(dst), COPY_LEN, 0);
				if (ret < 0)
					ERR_RETURN("Error with rte_dmadev_copy\n");

				if (rte_dma_burst_capacity(dev_id, vchan) != cap - (j + 1))
					ERR_RETURN("Error, ring capacity did not change as expected\n");
			}
			if (rte_dma_submit(dev_id, vchan) < 0)
				ERR_RETURN("Error, failed to submit burst\n");

			if (cap < rte_dma_burst_capacity(dev_id, vchan))
				ERR_RETURN("Error, avail ring capacity has gone up, not down\n");
		}
		await_hw(dev_id, vchan);

		for (i = 0; i < (ring_space / (2 * CAP_TEST_BURST_SIZE)) + 1; i++) {
			ret = rte_dma_completed(dev_id, vchan,
					CAP_TEST_BURST_SIZE, NULL, &dma_err);
			if (ret != CAP_TEST_BURST_SIZE || dma_err) {
				enum rte_dma_status_code status;

				rte_dma_completed_status(dev_id, vchan, 1, NULL, &status);
				ERR_RETURN("Error with rte_dmadev_completed, %u [expected: %u], dma_err = %d, i = %u, iter = %u, status = %u\n",
						ret, CAP_TEST_BURST_SIZE, dma_err, i, iter, status);
			}
		}
		cap = rte_dma_burst_capacity(dev_id, vchan);
		if (cap != ring_space)
			ERR_RETURN("Error, ring capacity has not reset to original value, got %u, expected %u\n",
					cap, ring_space);
	}

	rte_pktmbuf_free(src);
	rte_pktmbuf_free(dst);

	return 0;
}

static int
test_dmadev_instance(int16_t dev_id)
{
#define TEST_RINGSIZE 512
#define CHECK_ERRS    true
	struct rte_dma_stats stats;
	struct rte_dma_info info;
	const struct rte_dma_conf conf = { .nb_vchans = 1};
	const struct rte_dma_vchan_conf qconf = {
			.direction = RTE_DMA_DIR_MEM_TO_MEM,
			.nb_desc = TEST_RINGSIZE,
	};
	const int vchan = 0;
	int ret;

	ret = rte_dma_info_get(dev_id, &info);
	if (ret != 0)
		ERR_RETURN("Error with rte_dma_info_get()\n");

	printf("\n### Test dmadev instance %u [%s]\n",
			dev_id, info.dev_name);

	if (info.max_vchans < 1)
		ERR_RETURN("Error, no channels available on device id %u\n", dev_id);

	if (rte_dma_configure(dev_id, &conf) != 0)
		ERR_RETURN("Error with rte_dma_configure()\n");

	if (rte_dma_vchan_setup(dev_id, vchan, &qconf) < 0)
		ERR_RETURN("Error with queue configuration\n");

	ret = rte_dma_info_get(dev_id, &info);
	if (ret != 0 || info.nb_vchans != 1)
		ERR_RETURN("Error, no configured queues reported on device id %u\n", dev_id);

	if (rte_dma_start(dev_id) != 0)
		ERR_RETURN("Error with rte_dma_start()\n");

	if (rte_dma_stats_get(dev_id, vchan, &stats) != 0)
		ERR_RETURN("Error with rte_dma_stats_get()\n");

	if (rte_dma_burst_capacity(dev_id, vchan) < 32)
		ERR_RETURN("Error: Device does not have sufficient burst capacity to run tests");

	if (stats.completed != 0 || stats.submitted != 0 || stats.errors != 0)
		ERR_RETURN("Error device stats are not all zero: completed = %"PRIu64", "
				"submitted = %"PRIu64", errors = %"PRIu64"\n",
				stats.completed, stats.submitted, stats.errors);
	id_count = 0;

	/* create a mempool for running tests */
	pool = rte_pktmbuf_pool_create("TEST_DMADEV_POOL",
			TEST_RINGSIZE * 2, /* n == num elements */
			32,  /* cache size */
			0,   /* priv size */
			2048, /* data room size */
			info.numa_node);
	if (pool == NULL)
		ERR_RETURN("Error with mempool creation\n");

	/* run the test cases, use many iterations to ensure UINT16_MAX id wraparound */
	if (runtest("copy", test_enqueue_copies, 640, dev_id, vchan, CHECK_ERRS) < 0)
		goto err;

	/* run some burst capacity tests */
	if (rte_dma_burst_capacity(dev_id, vchan) < 64)
		printf("DMA Dev %u: insufficient burst capacity (64 required), skipping tests\n",
				dev_id);
	else if (runtest("burst capacity", test_burst_capacity, 1, dev_id, vchan, CHECK_ERRS) < 0)
		goto err;

	/* to test error handling we can provide null pointers for source or dest in copies. This
	 * requires VA mode in DPDK, since NULL(0) is a valid physical address.
	 * We also need hardware that can report errors back.
	 */
	if (rte_eal_iova_mode() != RTE_IOVA_VA)
		printf("DMA Dev %u: DPDK not in VA mode, skipping error handling tests\n", dev_id);
	else if ((info.dev_capa & RTE_DMA_CAPA_HANDLES_ERRORS) == 0)
		printf("DMA Dev %u: device does not report errors, skipping error handling tests\n",
				dev_id);
	else if (runtest("error handling", test_completion_handling, 1,
			dev_id, vchan, !CHECK_ERRS) < 0)
		goto err;

	if ((info.dev_capa & RTE_DMA_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_dma_stop(dev_id);
	rte_dma_stats_reset(dev_id, vchan);
	return 0;

err:
	rte_mempool_free(pool);
	rte_dma_stop(dev_id);
	return -1;
}

static int
test_apis(void)
{
	const char *pmd = "dma_skeleton";
	int id;
	int ret;

	/* attempt to create skeleton instance - ignore errors due to one being already present */
	rte_vdev_init(pmd, NULL);
	id = rte_dma_get_dev_id_by_name(pmd);
	if (id < 0)
		return TEST_SKIPPED;
	printf("\n### Test dmadev infrastructure using skeleton driver\n");
	ret = test_dma_api(id);

	return ret;
}

static int
test_dma(void)
{
	int i;

	/* basic sanity on dmadev infrastructure */
	if (test_apis() < 0)
		ERR_RETURN("Error performing API tests\n");

	if (rte_dma_count_avail() == 0)
		return TEST_SKIPPED;

	RTE_DMA_FOREACH_DEV(i)
		if (test_dmadev_instance(i) < 0)
			ERR_RETURN("Error, test failure for device %d\n", i);

	return 0;
}

REGISTER_TEST_COMMAND(dmadev_autotest, test_dma);