New upstream version 18.08upstream/18.08

Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 642 insertions, 0 deletions

diff --git a/drivers/common/qat/qat_qp.c b/drivers/common/qat/qat_qp.c
new file mode 100644
index 00000000..7ca7a45e
--- /dev/null
+++ b/drivers/common/qat/qat_qp.c
@@ -0,0 +1,642 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2015-2018 Intel Corporation
+ */
+
+#include <rte_common.h>
+#include <rte_dev.h>
+#include <rte_malloc.h>
+#include <rte_memzone.h>
+#include <rte_pci.h>
+#include <rte_bus_pci.h>
+#include <rte_atomic.h>
+#include <rte_prefetch.h>
+
+#include "qat_logs.h"
+#include "qat_device.h"
+#include "qat_qp.h"
+#include "qat_sym.h"
+#include "qat_comp.h"
+#include "adf_transport_access_macros.h"
+
+
+#define ADF_MAX_DESC				4096
+#define ADF_MIN_DESC				128
+
+#define ADF_ARB_REG_SLOT			0x1000
+#define ADF_ARB_RINGSRVARBEN_OFFSET		0x19C
+
+#define WRITE_CSR_ARB_RINGSRVARBEN(csr_addr, index, value) \
+	ADF_CSR_WR(csr_addr, ADF_ARB_RINGSRVARBEN_OFFSET + \
+	(ADF_ARB_REG_SLOT * index), value)
+
+__extension__
+const struct qat_qp_hw_data qat_gen1_qps[QAT_MAX_SERVICES]
+					 [ADF_MAX_QPS_ON_ANY_SERVICE] = {
+	/* queue pairs which provide an asymmetric crypto service */
+	[QAT_SERVICE_ASYMMETRIC] = {
+		{
+			.service_type = QAT_SERVICE_ASYMMETRIC,
+			.hw_bundle_num = 0,
+			.tx_ring_num = 0,
+			.rx_ring_num = 8,
+			.tx_msg_size = 64,
+			.rx_msg_size = 32,
+
+		}, {
+			.service_type = QAT_SERVICE_ASYMMETRIC,
+			.hw_bundle_num = 0,
+			.tx_ring_num = 1,
+			.rx_ring_num = 9,
+			.tx_msg_size = 64,
+			.rx_msg_size = 32,
+		}
+	},
+	/* queue pairs which provide a symmetric crypto service */
+	[QAT_SERVICE_SYMMETRIC] = {
+		{
+			.service_type = QAT_SERVICE_SYMMETRIC,
+			.hw_bundle_num = 0,
+			.tx_ring_num = 2,
+			.rx_ring_num = 10,
+			.tx_msg_size = 128,
+			.rx_msg_size = 32,
+		},
+		{
+			.service_type = QAT_SERVICE_SYMMETRIC,
+			.hw_bundle_num = 0,
+			.tx_ring_num = 3,
+			.rx_ring_num = 11,
+			.tx_msg_size = 128,
+			.rx_msg_size = 32,
+		}
+	},
+	/* queue pairs which provide a compression service */
+	[QAT_SERVICE_COMPRESSION] = {
+		{
+			.service_type = QAT_SERVICE_COMPRESSION,
+			.hw_bundle_num = 0,
+			.tx_ring_num = 6,
+			.rx_ring_num = 14,
+			.tx_msg_size = 128,
+			.rx_msg_size = 32,
+		}, {
+			.service_type = QAT_SERVICE_COMPRESSION,
+			.hw_bundle_num = 0,
+			.tx_ring_num = 7,
+			.rx_ring_num = 15,
+			.tx_msg_size = 128,
+			.rx_msg_size = 32,
+		}
+	}
+};
+
+static int qat_qp_check_queue_alignment(uint64_t phys_addr,
+	uint32_t queue_size_bytes);
+static void qat_queue_delete(struct qat_queue *queue);
+static int qat_queue_create(struct qat_pci_device *qat_dev,
+	struct qat_queue *queue, struct qat_qp_config *, uint8_t dir);
+static int adf_verify_queue_size(uint32_t msg_size, uint32_t msg_num,
+	uint32_t *queue_size_for_csr);
+static void adf_configure_queues(struct qat_qp *queue);
+static void adf_queue_arb_enable(struct qat_queue *txq, void *base_addr,
+	rte_spinlock_t *lock);
+static void adf_queue_arb_disable(struct qat_queue *txq, void *base_addr,
+	rte_spinlock_t *lock);
+
+
+int qat_qps_per_service(const struct qat_qp_hw_data *qp_hw_data,
+		enum qat_service_type service)
+{
+	int i, count;
+
+	for (i = 0, count = 0; i < ADF_MAX_QPS_ON_ANY_SERVICE; i++)
+		if (qp_hw_data[i].service_type == service)
+			count++;
+	return count;
+}
+
+static const struct rte_memzone *
+queue_dma_zone_reserve(const char *queue_name, uint32_t queue_size,
+			int socket_id)
+{
+	const struct rte_memzone *mz;
+
+	mz = rte_memzone_lookup(queue_name);
+	if (mz != 0) {
+		if (((size_t)queue_size <= mz->len) &&
+				((socket_id == SOCKET_ID_ANY) ||
+					(socket_id == mz->socket_id))) {
+			QAT_LOG(DEBUG, "re-use memzone already "
+					"allocated for %s", queue_name);
+			return mz;
+		}
+
+		QAT_LOG(ERR, "Incompatible memzone already "
+				"allocated %s, size %u, socket %d. "
+				"Requested size %u, socket %u",
+				queue_name, (uint32_t)mz->len,
+				mz->socket_id, queue_size, socket_id);
+		return NULL;
+	}
+
+	QAT_LOG(DEBUG, "Allocate memzone for %s, size %u on socket %u",
+					queue_name, queue_size, socket_id);
+	return rte_memzone_reserve_aligned(queue_name, queue_size,
+		socket_id, RTE_MEMZONE_IOVA_CONTIG, queue_size);
+}
+
+int qat_qp_setup(struct qat_pci_device *qat_dev,
+		struct qat_qp **qp_addr,
+		uint16_t queue_pair_id,
+		struct qat_qp_config *qat_qp_conf)
+
+{
+	struct qat_qp *qp;
+	struct rte_pci_device *pci_dev = qat_dev->pci_dev;
+	char op_cookie_pool_name[RTE_RING_NAMESIZE];
+	uint32_t i;
+
+	QAT_LOG(DEBUG, "Setup qp %u on qat pci device %d gen %d",
+		queue_pair_id, qat_dev->qat_dev_id, qat_dev->qat_dev_gen);
+
+	if ((qat_qp_conf->nb_descriptors > ADF_MAX_DESC) ||
+		(qat_qp_conf->nb_descriptors < ADF_MIN_DESC)) {
+		QAT_LOG(ERR, "Can't create qp for %u descriptors",
+				qat_qp_conf->nb_descriptors);
+		return -EINVAL;
+	}
+
+	if (pci_dev->mem_resource[0].addr == NULL) {
+		QAT_LOG(ERR, "Could not find VF config space "
+				"(UIO driver attached?).");
+		return -EINVAL;
+	}
+
+	/* Allocate the queue pair data structure. */
+	qp = rte_zmalloc("qat PMD qp metadata",
+			sizeof(*qp), RTE_CACHE_LINE_SIZE);
+	if (qp == NULL) {
+		QAT_LOG(ERR, "Failed to alloc mem for qp struct");
+		return -ENOMEM;
+	}
+	qp->nb_descriptors = qat_qp_conf->nb_descriptors;
+	qp->op_cookies = rte_zmalloc("qat PMD op cookie pointer",
+			qat_qp_conf->nb_descriptors * sizeof(*qp->op_cookies),
+			RTE_CACHE_LINE_SIZE);
+	if (qp->op_cookies == NULL) {
+		QAT_LOG(ERR, "Failed to alloc mem for cookie");
+		rte_free(qp);
+		return -ENOMEM;
+	}
+
+	qp->mmap_bar_addr = pci_dev->mem_resource[0].addr;
+	qp->inflights16 = 0;
+
+	if (qat_queue_create(qat_dev, &(qp->tx_q), qat_qp_conf,
+					ADF_RING_DIR_TX) != 0) {
+		QAT_LOG(ERR, "Tx queue create failed "
+				"queue_pair_id=%u", queue_pair_id);
+		goto create_err;
+	}
+
+	if (qat_queue_create(qat_dev, &(qp->rx_q), qat_qp_conf,
+					ADF_RING_DIR_RX) != 0) {
+		QAT_LOG(ERR, "Rx queue create failed "
+				"queue_pair_id=%hu", queue_pair_id);
+		qat_queue_delete(&(qp->tx_q));
+		goto create_err;
+	}
+
+	adf_configure_queues(qp);
+	adf_queue_arb_enable(&qp->tx_q, qp->mmap_bar_addr,
+					&qat_dev->arb_csr_lock);
+
+	snprintf(op_cookie_pool_name, RTE_RING_NAMESIZE,
+					"%s%d_cookies_%s_qp%hu",
+		pci_dev->driver->driver.name, qat_dev->qat_dev_id,
+		qat_qp_conf->service_str, queue_pair_id);
+
+	QAT_LOG(DEBUG, "cookiepool: %s", op_cookie_pool_name);
+	qp->op_cookie_pool = rte_mempool_lookup(op_cookie_pool_name);
+	if (qp->op_cookie_pool == NULL)
+		qp->op_cookie_pool = rte_mempool_create(op_cookie_pool_name,
+				qp->nb_descriptors,
+				qat_qp_conf->cookie_size, 64, 0,
+				NULL, NULL, NULL, NULL, qat_qp_conf->socket_id,
+				0);
+	if (!qp->op_cookie_pool) {
+		QAT_LOG(ERR, "QAT PMD Cannot create"
+				" op mempool");
+		goto create_err;
+	}
+
+	for (i = 0; i < qp->nb_descriptors; i++) {
+		if (rte_mempool_get(qp->op_cookie_pool, &qp->op_cookies[i])) {
+			QAT_LOG(ERR, "QAT PMD Cannot get op_cookie");
+			goto create_err;
+		}
+	}
+
+	qp->qat_dev_gen = qat_dev->qat_dev_gen;
+	qp->build_request = qat_qp_conf->build_request;
+	qp->service_type = qat_qp_conf->hw->service_type;
+	qp->qat_dev = qat_dev;
+
+	QAT_LOG(DEBUG, "QP setup complete: id: %d, cookiepool: %s",
+			queue_pair_id, op_cookie_pool_name);
+
+	*qp_addr = qp;
+	return 0;
+
+create_err:
+	if (qp->op_cookie_pool)
+		rte_mempool_free(qp->op_cookie_pool);
+	rte_free(qp->op_cookies);
+	rte_free(qp);
+	return -EFAULT;
+}
+
+int qat_qp_release(struct qat_qp **qp_addr)
+{
+	struct qat_qp *qp = *qp_addr;
+	uint32_t i;
+
+	if (qp == NULL) {
+		QAT_LOG(DEBUG, "qp already freed");
+		return 0;
+	}
+
+	QAT_LOG(DEBUG, "Free qp on qat_pci device %d",
+				qp->qat_dev->qat_dev_id);
+
+	/* Don't free memory if there are still responses to be processed */
+	if (qp->inflights16 == 0) {
+		qat_queue_delete(&(qp->tx_q));
+		qat_queue_delete(&(qp->rx_q));
+	} else {
+		return -EAGAIN;
+	}
+
+	adf_queue_arb_disable(&(qp->tx_q), qp->mmap_bar_addr,
+					&qp->qat_dev->arb_csr_lock);
+
+	for (i = 0; i < qp->nb_descriptors; i++)
+		rte_mempool_put(qp->op_cookie_pool, qp->op_cookies[i]);
+
+	if (qp->op_cookie_pool)
+		rte_mempool_free(qp->op_cookie_pool);
+
+	rte_free(qp->op_cookies);
+	rte_free(qp);
+	*qp_addr = NULL;
+	return 0;
+}
+
+
+static void qat_queue_delete(struct qat_queue *queue)
+{
+	const struct rte_memzone *mz;
+	int status = 0;
+
+	if (queue == NULL) {
+		QAT_LOG(DEBUG, "Invalid queue");
+		return;
+	}
+	QAT_LOG(DEBUG, "Free ring %d, memzone: %s",
+			queue->hw_queue_number, queue->memz_name);
+
+	mz = rte_memzone_lookup(queue->memz_name);
+	if (mz != NULL)	{
+		/* Write an unused pattern to the queue memory. */
+		memset(queue->base_addr, 0x7F, queue->queue_size);
+		status = rte_memzone_free(mz);
+		if (status != 0)
+			QAT_LOG(ERR, "Error %d on freeing queue %s",
+					status, queue->memz_name);
+	} else {
+		QAT_LOG(DEBUG, "queue %s doesn't exist",
+				queue->memz_name);
+	}
+}
+
+static int
+qat_queue_create(struct qat_pci_device *qat_dev, struct qat_queue *queue,
+		struct qat_qp_config *qp_conf, uint8_t dir)
+{
+	uint64_t queue_base;
+	void *io_addr;
+	const struct rte_memzone *qp_mz;
+	struct rte_pci_device *pci_dev = qat_dev->pci_dev;
+	int ret = 0;
+	uint16_t desc_size = (dir == ADF_RING_DIR_TX ?
+			qp_conf->hw->tx_msg_size : qp_conf->hw->rx_msg_size);
+	uint32_t queue_size_bytes = (qp_conf->nb_descriptors)*(desc_size);
+
+	queue->hw_bundle_number = qp_conf->hw->hw_bundle_num;
+	queue->hw_queue_number = (dir == ADF_RING_DIR_TX ?
+			qp_conf->hw->tx_ring_num : qp_conf->hw->rx_ring_num);
+
+	if (desc_size > ADF_MSG_SIZE_TO_BYTES(ADF_MAX_MSG_SIZE)) {
+		QAT_LOG(ERR, "Invalid descriptor size %d", desc_size);
+		return -EINVAL;
+	}
+
+	/*
+	 * Allocate a memzone for the queue - create a unique name.
+	 */
+	snprintf(queue->memz_name, sizeof(queue->memz_name),
+			"%s_%d_%s_%s_%d_%d",
+		pci_dev->driver->driver.name, qat_dev->qat_dev_id,
+		qp_conf->service_str, "qp_mem",
+		queue->hw_bundle_number, queue->hw_queue_number);
+	qp_mz = queue_dma_zone_reserve(queue->memz_name, queue_size_bytes,
+			qp_conf->socket_id);
+	if (qp_mz == NULL) {
+		QAT_LOG(ERR, "Failed to allocate ring memzone");
+		return -ENOMEM;
+	}
+
+	queue->base_addr = (char *)qp_mz->addr;
+	queue->base_phys_addr = qp_mz->iova;
+	if (qat_qp_check_queue_alignment(queue->base_phys_addr,
+			queue_size_bytes)) {
+		QAT_LOG(ERR, "Invalid alignment on queue create "
+					" 0x%"PRIx64"\n",
+					queue->base_phys_addr);
+		ret = -EFAULT;
+		goto queue_create_err;
+	}
+
+	if (adf_verify_queue_size(desc_size, qp_conf->nb_descriptors,
+			&(queue->queue_size)) != 0) {
+		QAT_LOG(ERR, "Invalid num inflights");
+		ret = -EINVAL;
+		goto queue_create_err;
+	}
+
+	queue->max_inflights = ADF_MAX_INFLIGHTS(queue->queue_size,
+					ADF_BYTES_TO_MSG_SIZE(desc_size));
+	queue->modulo_mask = (1 << ADF_RING_SIZE_MODULO(queue->queue_size)) - 1;
+
+	if (queue->max_inflights < 2) {
+		QAT_LOG(ERR, "Invalid num inflights");
+		ret = -EINVAL;
+		goto queue_create_err;
+	}
+	queue->head = 0;
+	queue->tail = 0;
+	queue->msg_size = desc_size;
+
+	/*
+	 * Write an unused pattern to the queue memory.
+	 */
+	memset(queue->base_addr, 0x7F, queue_size_bytes);
+
+	queue_base = BUILD_RING_BASE_ADDR(queue->base_phys_addr,
+					queue->queue_size);
+
+	io_addr = pci_dev->mem_resource[0].addr;
+
+	WRITE_CSR_RING_BASE(io_addr, queue->hw_bundle_number,
+			queue->hw_queue_number, queue_base);
+
+	QAT_LOG(DEBUG, "RING: Name:%s, size in CSR: %u, in bytes %u,"
+		" nb msgs %u, msg_size %u, max_inflights %u modulo mask %u",
+			queue->memz_name,
+			queue->queue_size, queue_size_bytes,
+			qp_conf->nb_descriptors, desc_size,
+			queue->max_inflights, queue->modulo_mask);
+
+	return 0;
+
+queue_create_err:
+	rte_memzone_free(qp_mz);
+	return ret;
+}
+
+static int qat_qp_check_queue_alignment(uint64_t phys_addr,
+					uint32_t queue_size_bytes)
+{
+	if (((queue_size_bytes - 1) & phys_addr) != 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int adf_verify_queue_size(uint32_t msg_size, uint32_t msg_num,
+	uint32_t *p_queue_size_for_csr)
+{
+	uint8_t i = ADF_MIN_RING_SIZE;
+
+	for (; i <= ADF_MAX_RING_SIZE; i++)
+		if ((msg_size * msg_num) ==
+				(uint32_t)ADF_SIZE_TO_RING_SIZE_IN_BYTES(i)) {
+			*p_queue_size_for_csr = i;
+			return 0;
+		}
+	QAT_LOG(ERR, "Invalid ring size %d", msg_size * msg_num);
+	return -EINVAL;
+}
+
+static void adf_queue_arb_enable(struct qat_queue *txq, void *base_addr,
+					rte_spinlock_t *lock)
+{
+	uint32_t arb_csr_offset =  ADF_ARB_RINGSRVARBEN_OFFSET +
+					(ADF_ARB_REG_SLOT *
+							txq->hw_bundle_number);
+	uint32_t value;
+
+	rte_spinlock_lock(lock);
+	value = ADF_CSR_RD(base_addr, arb_csr_offset);
+	value |= (0x01 << txq->hw_queue_number);
+	ADF_CSR_WR(base_addr, arb_csr_offset, value);
+	rte_spinlock_unlock(lock);
+}
+
+static void adf_queue_arb_disable(struct qat_queue *txq, void *base_addr,
+					rte_spinlock_t *lock)
+{
+	uint32_t arb_csr_offset =  ADF_ARB_RINGSRVARBEN_OFFSET +
+					(ADF_ARB_REG_SLOT *
+							txq->hw_bundle_number);
+	uint32_t value;
+
+	rte_spinlock_lock(lock);
+	value = ADF_CSR_RD(base_addr, arb_csr_offset);
+	value &= ~(0x01 << txq->hw_queue_number);
+	ADF_CSR_WR(base_addr, arb_csr_offset, value);
+	rte_spinlock_unlock(lock);
+}
+
+static void adf_configure_queues(struct qat_qp *qp)
+{
+	uint32_t queue_config;
+	struct qat_queue *queue = &qp->tx_q;
+
+	queue_config = BUILD_RING_CONFIG(queue->queue_size);
+
+	WRITE_CSR_RING_CONFIG(qp->mmap_bar_addr, queue->hw_bundle_number,
+			queue->hw_queue_number, queue_config);
+
+	queue = &qp->rx_q;
+	queue_config =
+			BUILD_RESP_RING_CONFIG(queue->queue_size,
+					ADF_RING_NEAR_WATERMARK_512,
+					ADF_RING_NEAR_WATERMARK_0);
+
+	WRITE_CSR_RING_CONFIG(qp->mmap_bar_addr, queue->hw_bundle_number,
+			queue->hw_queue_number, queue_config);
+}
+
+static inline uint32_t adf_modulo(uint32_t data, uint32_t modulo_mask)
+{
+	return data & modulo_mask;
+}
+
+static inline void
+txq_write_tail(struct qat_qp *qp, struct qat_queue *q) {
+	WRITE_CSR_RING_TAIL(qp->mmap_bar_addr, q->hw_bundle_number,
+			q->hw_queue_number, q->tail);
+	q->nb_pending_requests = 0;
+	q->csr_tail = q->tail;
+}
+
+static inline
+void rxq_free_desc(struct qat_qp *qp, struct qat_queue *q)
+{
+	uint32_t old_head, new_head;
+	uint32_t max_head;
+
+	old_head = q->csr_head;
+	new_head = q->head;
+	max_head = qp->nb_descriptors * q->msg_size;
+
+	/* write out free descriptors */
+	void *cur_desc = (uint8_t *)q->base_addr + old_head;
+
+	if (new_head < old_head) {
+		memset(cur_desc, ADF_RING_EMPTY_SIG_BYTE, max_head - old_head);
+		memset(q->base_addr, ADF_RING_EMPTY_SIG_BYTE, new_head);
+	} else {
+		memset(cur_desc, ADF_RING_EMPTY_SIG_BYTE, new_head - old_head);
+	}
+	q->nb_processed_responses = 0;
+	q->csr_head = new_head;
+
+	/* write current head to CSR */
+	WRITE_CSR_RING_HEAD(qp->mmap_bar_addr, q->hw_bundle_number,
+			    q->hw_queue_number, new_head);
+}
+
+uint16_t
+qat_enqueue_op_burst(void *qp, void **ops, uint16_t nb_ops)
+{
+	register struct qat_queue *queue;
+	struct qat_qp *tmp_qp = (struct qat_qp *)qp;
+	register uint32_t nb_ops_sent = 0;
+	register int ret;
+	uint16_t nb_ops_possible = nb_ops;
+	register uint8_t *base_addr;
+	register uint32_t tail;
+	int overflow;
+
+	if (unlikely(nb_ops == 0))
+		return 0;
+
+	/* read params used a lot in main loop into registers */
+	queue = &(tmp_qp->tx_q);
+	base_addr = (uint8_t *)queue->base_addr;
+	tail = queue->tail;
+
+	/* Find how many can actually fit on the ring */
+	tmp_qp->inflights16 += nb_ops;
+	overflow = tmp_qp->inflights16 - queue->max_inflights;
+	if (overflow > 0) {
+		tmp_qp->inflights16 -= overflow;
+		nb_ops_possible = nb_ops - overflow;
+		if (nb_ops_possible == 0)
+			return 0;
+	}
+
+	while (nb_ops_sent != nb_ops_possible) {
+		ret = tmp_qp->build_request(*ops, base_addr + tail,
+				tmp_qp->op_cookies[tail / queue->msg_size],
+				tmp_qp->qat_dev_gen);
+		if (ret != 0) {
+			tmp_qp->stats.enqueue_err_count++;
+			/*
+			 * This message cannot be enqueued,
+			 * decrease number of ops that wasn't sent
+			 */
+			tmp_qp->inflights16 -= nb_ops_possible - nb_ops_sent;
+			if (nb_ops_sent == 0)
+				return 0;
+			goto kick_tail;
+		}
+
+		tail = adf_modulo(tail + queue->msg_size, queue->modulo_mask);
+		ops++;
+		nb_ops_sent++;
+	}
+kick_tail:
+	queue->tail = tail;
+	tmp_qp->stats.enqueued_count += nb_ops_sent;
+	queue->nb_pending_requests += nb_ops_sent;
+	if (tmp_qp->inflights16 < QAT_CSR_TAIL_FORCE_WRITE_THRESH ||
+		    queue->nb_pending_requests > QAT_CSR_TAIL_WRITE_THRESH) {
+		txq_write_tail(tmp_qp, queue);
+	}
+	return nb_ops_sent;
+}
+
+uint16_t
+qat_dequeue_op_burst(void *qp, void **ops, uint16_t nb_ops)
+{
+	struct qat_queue *rx_queue, *tx_queue;
+	struct qat_qp *tmp_qp = (struct qat_qp *)qp;
+	uint32_t head;
+	uint32_t resp_counter = 0;
+	uint8_t *resp_msg;
+
+	rx_queue = &(tmp_qp->rx_q);
+	tx_queue = &(tmp_qp->tx_q);
+	head = rx_queue->head;
+	resp_msg = (uint8_t *)rx_queue->base_addr + rx_queue->head;
+
+	while (*(uint32_t *)resp_msg != ADF_RING_EMPTY_SIG &&
+			resp_counter != nb_ops) {
+
+		if (tmp_qp->service_type == QAT_SERVICE_SYMMETRIC)
+			qat_sym_process_response(ops, resp_msg);
+		else if (tmp_qp->service_type == QAT_SERVICE_COMPRESSION)
+			qat_comp_process_response(ops, resp_msg);
+
+		head = adf_modulo(head + rx_queue->msg_size,
+				  rx_queue->modulo_mask);
+
+		resp_msg = (uint8_t *)rx_queue->base_addr + head;
+		ops++;
+		resp_counter++;
+	}
+	if (resp_counter > 0) {
+		rx_queue->head = head;
+		tmp_qp->stats.dequeued_count += resp_counter;
+		rx_queue->nb_processed_responses += resp_counter;
+		tmp_qp->inflights16 -= resp_counter;
+
+		if (rx_queue->nb_processed_responses >
+						QAT_CSR_HEAD_WRITE_THRESH)
+			rxq_free_desc(tmp_qp, rx_queue);
+	}
+	/* also check if tail needs to be advanced */
+	if (tmp_qp->inflights16 <= QAT_CSR_TAIL_FORCE_WRITE_THRESH &&
+		tx_queue->tail != tx_queue->csr_tail) {
+		txq_write_tail(tmp_qp, tx_queue);
+	}
+	return resp_counter;
+}
+
+__attribute__((weak)) int
+qat_comp_process_response(void **op __rte_unused, uint8_t *resp __rte_unused)
+{
+	return  0;
+}