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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018-2019 Intel Corporation
 */

#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_hexdump.h>
#include <rte_comp.h>
#include <rte_bus_pci.h>
#include <rte_byteorder.h>
#include <rte_memcpy.h>
#include <rte_common.h>
#include <rte_spinlock.h>
#include <rte_log.h>
#include <rte_malloc.h>

#include "qat_logs.h"
#include "qat_comp.h"
#include "qat_comp_pmd.h"


int
qat_comp_build_request(void *in_op, uint8_t *out_msg,
		       void *op_cookie,
		       enum qat_device_gen qat_dev_gen __rte_unused)
{
	struct rte_comp_op *op = in_op;
	struct qat_comp_op_cookie *cookie =
			(struct qat_comp_op_cookie *)op_cookie;
	struct qat_comp_stream *stream;
	struct qat_comp_xform *qat_xform;
	const uint8_t *tmpl;
	struct icp_qat_fw_comp_req *comp_req =
	    (struct icp_qat_fw_comp_req *)out_msg;

	if (op->op_type == RTE_COMP_OP_STATEFUL) {
		stream = op->stream;
		qat_xform = &stream->qat_xform;
		if (unlikely(qat_xform->qat_comp_request_type !=
			     QAT_COMP_REQUEST_DECOMPRESS)) {
			QAT_DP_LOG(ERR, "QAT PMD does not support stateful compression");
			op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
			return -EINVAL;
		}
		if (unlikely(stream->op_in_progress)) {
			QAT_DP_LOG(ERR, "QAT PMD does not support running multiple stateful operations on the same stream at once");
			op->status = RTE_COMP_OP_STATUS_INVALID_STATE;
			return -EINVAL;
		}
		stream->op_in_progress = 1;
	} else {
		stream = NULL;
		qat_xform = op->private_xform;
	}
	tmpl = (uint8_t *)&qat_xform->qat_comp_req_tmpl;

	rte_mov128(out_msg, tmpl);
	comp_req->comn_mid.opaque_data = (uint64_t)(uintptr_t)op;

	if (op->op_type == RTE_COMP_OP_STATEFUL) {
		comp_req->comp_pars.req_par_flags =
			ICP_QAT_FW_COMP_REQ_PARAM_FLAGS_BUILD(
				(stream->start_of_packet) ?
					ICP_QAT_FW_COMP_SOP
				      : ICP_QAT_FW_COMP_NOT_SOP,
				(op->flush_flag == RTE_COMP_FLUSH_FULL ||
				 op->flush_flag == RTE_COMP_FLUSH_FINAL) ?
					ICP_QAT_FW_COMP_EOP
				      : ICP_QAT_FW_COMP_NOT_EOP,
				ICP_QAT_FW_COMP_NOT_BFINAL,
				ICP_QAT_FW_COMP_NO_CNV,
				ICP_QAT_FW_COMP_NO_CNV_RECOVERY);
	}

	if (likely(qat_xform->qat_comp_request_type ==
		    QAT_COMP_REQUEST_DYNAMIC_COMP_STATELESS)) {
		if (unlikely(op->src.length > QAT_FALLBACK_THLD)) {

			/* fallback to fixed compression */
			comp_req->comn_hdr.service_cmd_id =
					ICP_QAT_FW_COMP_CMD_STATIC;

			ICP_QAT_FW_COMN_NEXT_ID_SET(&comp_req->comp_cd_ctrl,
					ICP_QAT_FW_SLICE_DRAM_WR);

			ICP_QAT_FW_COMN_NEXT_ID_SET(&comp_req->u2.xlt_cd_ctrl,
					ICP_QAT_FW_SLICE_NULL);
			ICP_QAT_FW_COMN_CURR_ID_SET(&comp_req->u2.xlt_cd_ctrl,
					ICP_QAT_FW_SLICE_NULL);

			QAT_DP_LOG(DEBUG, "QAT PMD: fallback to fixed "
				   "compression! IM buffer size can be too low "
				   "for produced data.\n Please use input "
				   "buffer length lower than %d bytes",
				   QAT_FALLBACK_THLD);
		}
	}

	/* common for sgl and flat buffers */
	comp_req->comp_pars.comp_len = op->src.length;
	comp_req->comp_pars.out_buffer_sz = rte_pktmbuf_pkt_len(op->m_dst) -
			op->dst.offset;

	if (op->m_src->next != NULL || op->m_dst->next != NULL) {
		/* sgl */
		int ret = 0;

		ICP_QAT_FW_COMN_PTR_TYPE_SET(comp_req->comn_hdr.comn_req_flags,
				QAT_COMN_PTR_TYPE_SGL);

		if (unlikely(op->m_src->nb_segs > cookie->src_nb_elems)) {
			/* we need to allocate more elements in SGL*/
			void *tmp;

			tmp = rte_realloc_socket(cookie->qat_sgl_src_d,
					  sizeof(struct qat_sgl) +
					  sizeof(struct qat_flat_buf) *
					  op->m_src->nb_segs, 64,
					  cookie->socket_id);

			if (unlikely(tmp == NULL)) {
				QAT_DP_LOG(ERR, "QAT PMD can't allocate memory"
					   " for %d elements of SGL",
					   op->m_src->nb_segs);
				op->status = RTE_COMP_OP_STATUS_ERROR;
				/* clear op-in-progress flag */
				if (stream)
					stream->op_in_progress = 0;
				return -ENOMEM;
			}
			/* new SGL is valid now */
			cookie->qat_sgl_src_d = (struct qat_sgl *)tmp;
			cookie->src_nb_elems = op->m_src->nb_segs;
			cookie->qat_sgl_src_phys_addr =
				rte_malloc_virt2iova(cookie->qat_sgl_src_d);
		}

		ret = qat_sgl_fill_array(op->m_src,
				op->src.offset,
				cookie->qat_sgl_src_d,
				op->src.length,
				cookie->src_nb_elems);
		if (ret) {
			QAT_DP_LOG(ERR, "QAT PMD Cannot fill source sgl array");
			op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
			/* clear op-in-progress flag */
			if (stream)
				stream->op_in_progress = 0;
			return ret;
		}

		if (unlikely(op->m_dst->nb_segs > cookie->dst_nb_elems)) {
			/* we need to allocate more elements in SGL*/
			struct qat_sgl *tmp;

			tmp = rte_realloc_socket(cookie->qat_sgl_dst_d,
					  sizeof(struct qat_sgl) +
					  sizeof(struct qat_flat_buf) *
					  op->m_dst->nb_segs, 64,
					  cookie->socket_id);

			if (unlikely(tmp == NULL)) {
				QAT_DP_LOG(ERR, "QAT PMD can't allocate memory"
					   " for %d elements of SGL",
					   op->m_dst->nb_segs);
				op->status = RTE_COMP_OP_STATUS_ERROR;
				/* clear op-in-progress flag */
				if (stream)
					stream->op_in_progress = 0;
				return -ENOMEM;
			}
			/* new SGL is valid now */
			cookie->qat_sgl_dst_d = (struct qat_sgl *)tmp;
			cookie->dst_nb_elems = op->m_dst->nb_segs;
			cookie->qat_sgl_dst_phys_addr =
				rte_malloc_virt2iova(cookie->qat_sgl_dst_d);
		}

		ret = qat_sgl_fill_array(op->m_dst,
				op->dst.offset,
				cookie->qat_sgl_dst_d,
				comp_req->comp_pars.out_buffer_sz,
				cookie->dst_nb_elems);
		if (ret) {
			QAT_DP_LOG(ERR, "QAT PMD Cannot fill dest. sgl array");
			op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
			/* clear op-in-progress flag */
			if (stream)
				stream->op_in_progress = 0;
			return ret;
		}

		comp_req->comn_mid.src_data_addr =
				cookie->qat_sgl_src_phys_addr;
		comp_req->comn_mid.dest_data_addr =
				cookie->qat_sgl_dst_phys_addr;
		comp_req->comn_mid.src_length = 0;
		comp_req->comn_mid.dst_length = 0;

	} else {
		/* flat aka linear buffer */
		ICP_QAT_FW_COMN_PTR_TYPE_SET(comp_req->comn_hdr.comn_req_flags,
				QAT_COMN_PTR_TYPE_FLAT);
		comp_req->comn_mid.src_length = op->src.length;
		comp_req->comn_mid.dst_length =
				comp_req->comp_pars.out_buffer_sz;

		comp_req->comn_mid.src_data_addr =
		    rte_pktmbuf_mtophys_offset(op->m_src, op->src.offset);
		comp_req->comn_mid.dest_data_addr =
		    rte_pktmbuf_mtophys_offset(op->m_dst, op->dst.offset);
	}

	if (unlikely(rte_pktmbuf_pkt_len(op->m_dst) < QAT_MIN_OUT_BUF_SIZE)) {
		/* QAT doesn't support dest. buffer lower
		 * than QAT_MIN_OUT_BUF_SIZE. Propagate error mark
		 * by converting this request to the null one
		 * and check the status in the response.
		 */
		QAT_DP_LOG(WARNING, "QAT destination buffer too small - resend with larger buffer");
		comp_req->comn_hdr.service_type = ICP_QAT_FW_COMN_REQ_NULL;
		comp_req->comn_hdr.service_cmd_id = ICP_QAT_FW_NULL_REQ_SERV_ID;
		cookie->error = RTE_COMP_OP_STATUS_OUT_OF_SPACE_TERMINATED;
	}

#if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
	QAT_DP_LOG(DEBUG, "Direction: %s",
	    qat_xform->qat_comp_request_type == QAT_COMP_REQUEST_DECOMPRESS ?
			    "decompression" : "compression");
	QAT_DP_HEXDUMP_LOG(DEBUG, "qat compression message:", comp_req,
		    sizeof(struct icp_qat_fw_comp_req));
#endif
	return 0;
}

int
qat_comp_process_response(void **op, uint8_t *resp, void *op_cookie,
			  uint64_t *dequeue_err_count)
{
	struct icp_qat_fw_comp_resp *resp_msg =
			(struct icp_qat_fw_comp_resp *)resp;
	struct qat_comp_op_cookie *cookie =
			(struct qat_comp_op_cookie *)op_cookie;
	struct rte_comp_op *rx_op = (struct rte_comp_op *)(uintptr_t)
			(resp_msg->opaque_data);
	struct qat_comp_stream *stream;
	struct qat_comp_xform *qat_xform;
	int err = resp_msg->comn_resp.comn_status &
			((1 << QAT_COMN_RESP_CMP_STATUS_BITPOS) |
			 (1 << QAT_COMN_RESP_XLAT_STATUS_BITPOS));

	if (rx_op->op_type == RTE_COMP_OP_STATEFUL) {
		stream = rx_op->stream;
		qat_xform = &stream->qat_xform;
		/* clear op-in-progress flag */
		stream->op_in_progress = 0;
	} else {
		stream = NULL;
		qat_xform = rx_op->private_xform;
	}

#if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
	QAT_DP_LOG(DEBUG, "Direction: %s",
	    qat_xform->qat_comp_request_type == QAT_COMP_REQUEST_DECOMPRESS ?
	    "decompression" : "compression");
	QAT_DP_HEXDUMP_LOG(DEBUG,  "qat_response:", (uint8_t *)resp_msg,
			sizeof(struct icp_qat_fw_comp_resp));
#endif

	if (unlikely(cookie->error)) {
		rx_op->status = cookie->error;
		cookie->error = 0;
		++(*dequeue_err_count);
		rx_op->debug_status = 0;
		rx_op->consumed = 0;
		rx_op->produced = 0;
		*op = (void *)rx_op;
		return 0;
	}

	if (likely(qat_xform->qat_comp_request_type
			!= QAT_COMP_REQUEST_DECOMPRESS)) {
		if (unlikely(ICP_QAT_FW_COMN_HDR_CNV_FLAG_GET(
				resp_msg->comn_resp.hdr_flags)
					== ICP_QAT_FW_COMP_NO_CNV)) {
			rx_op->status = RTE_COMP_OP_STATUS_ERROR;
			rx_op->debug_status = ERR_CODE_QAT_COMP_WRONG_FW;
			*op = (void *)rx_op;
			QAT_DP_LOG(ERR, "QAT has wrong firmware");
			++(*dequeue_err_count);
			return 0;
		}
	}

	if (err) {
		if (unlikely((err & (1 << QAT_COMN_RESP_XLAT_STATUS_BITPOS))
			     &&	(qat_xform->qat_comp_request_type
				 == QAT_COMP_REQUEST_DYNAMIC_COMP_STATELESS))) {
			QAT_DP_LOG(ERR, "QAT intermediate buffer may be too "
			    "small for output, try configuring a larger size");
		}

		int8_t cmp_err_code =
			(int8_t)resp_msg->comn_resp.comn_error.cmp_err_code;
		int8_t xlat_err_code =
			(int8_t)resp_msg->comn_resp.comn_error.xlat_err_code;

		/* handle recoverable out-of-buffer condition in stateful */
		/* decompression scenario */
		if (cmp_err_code == ERR_CODE_OVERFLOW_ERROR && !xlat_err_code
				&& qat_xform->qat_comp_request_type
					== QAT_COMP_REQUEST_DECOMPRESS
				&& rx_op->op_type == RTE_COMP_OP_STATEFUL) {
			struct icp_qat_fw_resp_comp_pars *comp_resp =
					&resp_msg->comp_resp_pars;
			rx_op->status =
				RTE_COMP_OP_STATUS_OUT_OF_SPACE_RECOVERABLE;
			rx_op->consumed = comp_resp->input_byte_counter;
			rx_op->produced = comp_resp->output_byte_counter;
			stream->start_of_packet = 0;
		} else if ((cmp_err_code == ERR_CODE_OVERFLOW_ERROR
			  && !xlat_err_code)
				||
		    (!cmp_err_code && xlat_err_code == ERR_CODE_OVERFLOW_ERROR)
				||
		    (cmp_err_code == ERR_CODE_OVERFLOW_ERROR &&
		     xlat_err_code == ERR_CODE_OVERFLOW_ERROR)){

			struct icp_qat_fw_resp_comp_pars *comp_resp =
	  (struct icp_qat_fw_resp_comp_pars *)&resp_msg->comp_resp_pars;

			/* handle recoverable out-of-buffer condition */
			/* in stateless compression scenario */
			if (comp_resp->input_byte_counter) {
				if ((qat_xform->qat_comp_request_type
				== QAT_COMP_REQUEST_FIXED_COMP_STATELESS) ||
				    (qat_xform->qat_comp_request_type
				== QAT_COMP_REQUEST_DYNAMIC_COMP_STATELESS)) {

					rx_op->status =
				RTE_COMP_OP_STATUS_OUT_OF_SPACE_RECOVERABLE;
					rx_op->consumed =
						comp_resp->input_byte_counter;
					rx_op->produced =
						comp_resp->output_byte_counter;
				} else
					rx_op->status =
				RTE_COMP_OP_STATUS_OUT_OF_SPACE_TERMINATED;
			} else
				rx_op->status =
				RTE_COMP_OP_STATUS_OUT_OF_SPACE_TERMINATED;
		} else
			rx_op->status = RTE_COMP_OP_STATUS_ERROR;

		++(*dequeue_err_count);
		rx_op->debug_status =
			*((uint16_t *)(&resp_msg->comn_resp.comn_error));
	} else {
		struct icp_qat_fw_resp_comp_pars *comp_resp =
		  (struct icp_qat_fw_resp_comp_pars *)&resp_msg->comp_resp_pars;

		rx_op->status = RTE_COMP_OP_STATUS_SUCCESS;
		rx_op->consumed = comp_resp->input_byte_counter;
		rx_op->produced = comp_resp->output_byte_counter;
		if (stream)
			stream->start_of_packet = 0;

		if (qat_xform->checksum_type != RTE_COMP_CHECKSUM_NONE) {
			if (qat_xform->checksum_type == RTE_COMP_CHECKSUM_CRC32)
				rx_op->output_chksum = comp_resp->curr_crc32;
			else if (qat_xform->checksum_type ==
					RTE_COMP_CHECKSUM_ADLER32)
				rx_op->output_chksum = comp_resp->curr_adler_32;
			else
				rx_op->output_chksum = comp_resp->curr_chksum;
		}
	}
	*op = (void *)rx_op;

	return 0;
}

unsigned int
qat_comp_xform_size(void)
{
	return RTE_ALIGN_CEIL(sizeof(struct qat_comp_xform), 8);
}

unsigned int
qat_comp_stream_size(void)
{
	return RTE_ALIGN_CEIL(sizeof(struct qat_comp_stream), 8);
}

static void qat_comp_create_req_hdr(struct icp_qat_fw_comn_req_hdr *header,
				    enum qat_comp_request_type request)
{
	if (request == QAT_COMP_REQUEST_FIXED_COMP_STATELESS)
		header->service_cmd_id = ICP_QAT_FW_COMP_CMD_STATIC;
	else if (request == QAT_COMP_REQUEST_DYNAMIC_COMP_STATELESS)
		header->service_cmd_id = ICP_QAT_FW_COMP_CMD_DYNAMIC;
	else if (request == QAT_COMP_REQUEST_DECOMPRESS)
		header->service_cmd_id = ICP_QAT_FW_COMP_CMD_DECOMPRESS;

	header->service_type = ICP_QAT_FW_COMN_REQ_CPM_FW_COMP;
	header->hdr_flags =
	    ICP_QAT_FW_COMN_HDR_FLAGS_BUILD(ICP_QAT_FW_COMN_REQ_FLAG_SET);

	header->comn_req_flags = ICP_QAT_FW_COMN_FLAGS_BUILD(
	    QAT_COMN_CD_FLD_TYPE_16BYTE_DATA, QAT_COMN_PTR_TYPE_FLAT);
}

static int qat_comp_create_templates(struct qat_comp_xform *qat_xform,
			const struct rte_memzone *interm_buff_mz,
			const struct rte_comp_xform *xform,
			const struct qat_comp_stream *stream,
			enum rte_comp_op_type op_type)
{
	struct icp_qat_fw_comp_req *comp_req;
	int comp_level, algo;
	uint32_t req_par_flags;
	int direction = ICP_QAT_HW_COMPRESSION_DIR_COMPRESS;

	if (unlikely(qat_xform == NULL)) {
		QAT_LOG(ERR, "Session was not created for this device");
		return -EINVAL;
	}

	if (op_type == RTE_COMP_OP_STATEFUL) {
		if (unlikely(stream == NULL)) {
			QAT_LOG(ERR, "Stream must be non null for stateful op");
			return -EINVAL;
		}
		if (unlikely(qat_xform->qat_comp_request_type !=
			     QAT_COMP_REQUEST_DECOMPRESS)) {
			QAT_LOG(ERR, "QAT PMD does not support stateful compression");
			return -ENOTSUP;
		}
	}

	if (qat_xform->qat_comp_request_type == QAT_COMP_REQUEST_DECOMPRESS) {
		direction = ICP_QAT_HW_COMPRESSION_DIR_DECOMPRESS;
		comp_level = ICP_QAT_HW_COMPRESSION_DEPTH_1;
		req_par_flags = ICP_QAT_FW_COMP_REQ_PARAM_FLAGS_BUILD(
				ICP_QAT_FW_COMP_SOP, ICP_QAT_FW_COMP_EOP,
				ICP_QAT_FW_COMP_BFINAL, ICP_QAT_FW_COMP_NO_CNV,
				ICP_QAT_FW_COMP_NO_CNV_RECOVERY);

	} else {
		if (xform->compress.level == RTE_COMP_LEVEL_PMD_DEFAULT)
			comp_level = ICP_QAT_HW_COMPRESSION_DEPTH_8;
		else if (xform->compress.level == 1)
			comp_level = ICP_QAT_HW_COMPRESSION_DEPTH_1;
		else if (xform->compress.level == 2)
			comp_level = ICP_QAT_HW_COMPRESSION_DEPTH_4;
		else if (xform->compress.level == 3)
			comp_level = ICP_QAT_HW_COMPRESSION_DEPTH_8;
		else if (xform->compress.level >= 4 &&
			 xform->compress.level <= 9)
			comp_level = ICP_QAT_HW_COMPRESSION_DEPTH_16;
		else {
			QAT_LOG(ERR, "compression level not supported");
			return -EINVAL;
		}
		req_par_flags = ICP_QAT_FW_COMP_REQ_PARAM_FLAGS_BUILD(
				ICP_QAT_FW_COMP_SOP, ICP_QAT_FW_COMP_EOP,
				ICP_QAT_FW_COMP_BFINAL, ICP_QAT_FW_COMP_CNV,
				ICP_QAT_FW_COMP_CNV_RECOVERY);
	}

	switch (xform->compress.algo) {
	case RTE_COMP_ALGO_DEFLATE:
		algo = ICP_QAT_HW_COMPRESSION_ALGO_DEFLATE;
		break;
	case RTE_COMP_ALGO_LZS:
	default:
		/* RTE_COMP_NULL */
		QAT_LOG(ERR, "compression algorithm not supported");
		return -EINVAL;
	}

	comp_req = &qat_xform->qat_comp_req_tmpl;

	/* Initialize header */
	qat_comp_create_req_hdr(&comp_req->comn_hdr,
					qat_xform->qat_comp_request_type);

	if (op_type == RTE_COMP_OP_STATEFUL) {
		comp_req->comn_hdr.serv_specif_flags =
				ICP_QAT_FW_COMP_FLAGS_BUILD(
			ICP_QAT_FW_COMP_STATEFUL_SESSION,
			ICP_QAT_FW_COMP_NOT_AUTO_SELECT_BEST,
			ICP_QAT_FW_COMP_NOT_ENH_AUTO_SELECT_BEST,
			ICP_QAT_FW_COMP_NOT_DISABLE_TYPE0_ENH_AUTO_SELECT_BEST,
			ICP_QAT_FW_COMP_ENABLE_SECURE_RAM_USED_AS_INTMD_BUF);

		/* Decompression state registers */
		comp_req->comp_cd_ctrl.comp_state_addr =
				stream->state_registers_decomp_phys;

		/* Enable A, B, C, D, and E (CAMs). */
		comp_req->comp_cd_ctrl.ram_bank_flags =
			ICP_QAT_FW_COMP_RAM_FLAGS_BUILD(
				ICP_QAT_FW_COMP_BANK_DISABLED, /* Bank I */
				ICP_QAT_FW_COMP_BANK_DISABLED, /* Bank H */
				ICP_QAT_FW_COMP_BANK_DISABLED, /* Bank G */
				ICP_QAT_FW_COMP_BANK_DISABLED, /* Bank F */
				ICP_QAT_FW_COMP_BANK_ENABLED,  /* Bank E */
				ICP_QAT_FW_COMP_BANK_ENABLED,  /* Bank D */
				ICP_QAT_FW_COMP_BANK_ENABLED,  /* Bank C */
				ICP_QAT_FW_COMP_BANK_ENABLED,  /* Bank B */
				ICP_QAT_FW_COMP_BANK_ENABLED); /* Bank A */

		comp_req->comp_cd_ctrl.ram_banks_addr =
				stream->inflate_context_phys;
	} else {
		comp_req->comn_hdr.serv_specif_flags =
				ICP_QAT_FW_COMP_FLAGS_BUILD(
			ICP_QAT_FW_COMP_STATELESS_SESSION,
			ICP_QAT_FW_COMP_NOT_AUTO_SELECT_BEST,
			ICP_QAT_FW_COMP_NOT_ENH_AUTO_SELECT_BEST,
			ICP_QAT_FW_COMP_NOT_DISABLE_TYPE0_ENH_AUTO_SELECT_BEST,
			ICP_QAT_FW_COMP_ENABLE_SECURE_RAM_USED_AS_INTMD_BUF);
	}

	comp_req->cd_pars.sl.comp_slice_cfg_word[0] =
	    ICP_QAT_HW_COMPRESSION_CONFIG_BUILD(
		direction,
		/* In CPM 1.6 only valid mode ! */
		ICP_QAT_HW_COMPRESSION_DELAYED_MATCH_ENABLED, algo,
		/* Translate level to depth */
		comp_level, ICP_QAT_HW_COMPRESSION_FILE_TYPE_0);

	comp_req->comp_pars.initial_adler = 1;
	comp_req->comp_pars.initial_crc32 = 0;
	comp_req->comp_pars.req_par_flags = req_par_flags;


	if (qat_xform->qat_comp_request_type ==
			QAT_COMP_REQUEST_FIXED_COMP_STATELESS ||
	    qat_xform->qat_comp_request_type == QAT_COMP_REQUEST_DECOMPRESS) {
		ICP_QAT_FW_COMN_NEXT_ID_SET(&comp_req->comp_cd_ctrl,
					    ICP_QAT_FW_SLICE_DRAM_WR);
		ICP_QAT_FW_COMN_CURR_ID_SET(&comp_req->comp_cd_ctrl,
					    ICP_QAT_FW_SLICE_COMP);
	} else if (qat_xform->qat_comp_request_type ==
			QAT_COMP_REQUEST_DYNAMIC_COMP_STATELESS) {

		ICP_QAT_FW_COMN_NEXT_ID_SET(&comp_req->comp_cd_ctrl,
				ICP_QAT_FW_SLICE_XLAT);
		ICP_QAT_FW_COMN_CURR_ID_SET(&comp_req->comp_cd_ctrl,
				ICP_QAT_FW_SLICE_COMP);

		ICP_QAT_FW_COMN_NEXT_ID_SET(&comp_req->u2.xlt_cd_ctrl,
				ICP_QAT_FW_SLICE_DRAM_WR);
		ICP_QAT_FW_COMN_CURR_ID_SET(&comp_req->u2.xlt_cd_ctrl,
				ICP_QAT_FW_SLICE_XLAT);

		comp_req->u1.xlt_pars.inter_buff_ptr =
				interm_buff_mz->phys_addr;
	}

#if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
	QAT_DP_HEXDUMP_LOG(DEBUG, "qat compression message template:", comp_req,
		    sizeof(struct icp_qat_fw_comp_req));
#endif
	return 0;
}

/**
 * Create driver private_xform data.
 *
 * @param dev
 *   Compressdev device
 * @param xform
 *   xform data from application
 * @param private_xform
 *   ptr where handle of pmd's private_xform data should be stored
 * @return
 *  - if successful returns 0
 *    and valid private_xform handle
 *  - <0 in error cases
 *  - Returns -EINVAL if input parameters are invalid.
 *  - Returns -ENOTSUP if comp device does not support the comp transform.
 *  - Returns -ENOMEM if the private_xform could not be allocated.
 */
int
qat_comp_private_xform_create(struct rte_compressdev *dev,
			      const struct rte_comp_xform *xform,
			      void **private_xform)
{
	struct qat_comp_dev_private *qat = dev->data->dev_private;

	if (unlikely(private_xform == NULL)) {
		QAT_LOG(ERR, "QAT: private_xform parameter is NULL");
		return -EINVAL;
	}
	if (unlikely(qat->xformpool == NULL)) {
		QAT_LOG(ERR, "QAT device has no private_xform mempool");
		return -ENOMEM;
	}
	if (rte_mempool_get(qat->xformpool, private_xform)) {
		QAT_LOG(ERR, "Couldn't get object from qat xform mempool");
		return -ENOMEM;
	}

	struct qat_comp_xform *qat_xform =
			(struct qat_comp_xform *)*private_xform;

	if (xform->type == RTE_COMP_COMPRESS) {

		if (xform->compress.deflate.huffman == RTE_COMP_HUFFMAN_FIXED ||
		  ((xform->compress.deflate.huffman == RTE_COMP_HUFFMAN_DEFAULT)
				   && qat->interm_buff_mz == NULL))
			qat_xform->qat_comp_request_type =
					QAT_COMP_REQUEST_FIXED_COMP_STATELESS;

		else if ((xform->compress.deflate.huffman ==
				RTE_COMP_HUFFMAN_DYNAMIC ||
				xform->compress.deflate.huffman ==
						RTE_COMP_HUFFMAN_DEFAULT) &&
				qat->interm_buff_mz != NULL)

			qat_xform->qat_comp_request_type =
					QAT_COMP_REQUEST_DYNAMIC_COMP_STATELESS;

		else {
			QAT_LOG(ERR,
					"IM buffers needed for dynamic deflate. Set size in config file");
			return -EINVAL;
		}

		qat_xform->checksum_type = xform->compress.chksum;

	} else {
		qat_xform->qat_comp_request_type = QAT_COMP_REQUEST_DECOMPRESS;
		qat_xform->checksum_type = xform->decompress.chksum;
	}

	if (qat_comp_create_templates(qat_xform, qat->interm_buff_mz, xform,
				      NULL, RTE_COMP_OP_STATELESS)) {
		QAT_LOG(ERR, "QAT: Problem with setting compression");
		return -EINVAL;
	}
	return 0;
}

/**
 * Free driver private_xform data.
 *
 * @param dev
 *   Compressdev device
 * @param private_xform
 *   handle of pmd's private_xform data
 * @return
 *  - 0 if successful
 *  - <0 in error cases
 *  - Returns -EINVAL if input parameters are invalid.
 */
int
qat_comp_private_xform_free(struct rte_compressdev *dev __rte_unused,
			    void *private_xform)
{
	struct qat_comp_xform *qat_xform =
			(struct qat_comp_xform *)private_xform;

	if (qat_xform) {
		memset(qat_xform, 0, qat_comp_xform_size());
		struct rte_mempool *mp = rte_mempool_from_obj(qat_xform);

		rte_mempool_put(mp, qat_xform);
		return 0;
	}
	return -EINVAL;
}

/**
 * Reset stream state for the next use.
 *
 * @param stream
 *   handle of pmd's private stream data
 */
static void
qat_comp_stream_reset(struct qat_comp_stream *stream)
{
	if (stream) {
		memset(&stream->qat_xform, 0, sizeof(struct qat_comp_xform));
		stream->start_of_packet = 1;
		stream->op_in_progress = 0;
	}
}

/**
 * Create driver private stream data.
 *
 * @param dev
 *   Compressdev device
 * @param xform
 *   xform data
 * @param stream
 *   ptr where handle of pmd's private stream data should be stored
 * @return
 *  - Returns 0 if private stream structure has been created successfully.
 *  - Returns -EINVAL if input parameters are invalid.
 *  - Returns -ENOTSUP if comp device does not support STATEFUL operations.
 *  - Returns -ENOTSUP if comp device does not support the comp transform.
 *  - Returns -ENOMEM if the private stream could not be allocated.
 */
int
qat_comp_stream_create(struct rte_compressdev *dev,
		       const struct rte_comp_xform *xform,
		       void **stream)
{
	struct qat_comp_dev_private *qat = dev->data->dev_private;
	struct qat_comp_stream *ptr;

	if (unlikely(stream == NULL)) {
		QAT_LOG(ERR, "QAT: stream parameter is NULL");
		return -EINVAL;
	}
	if (unlikely(xform->type == RTE_COMP_COMPRESS)) {
		QAT_LOG(ERR, "QAT: stateful compression not supported");
		return -ENOTSUP;
	}
	if (unlikely(qat->streampool == NULL)) {
		QAT_LOG(ERR, "QAT device has no stream mempool");
		return -ENOMEM;
	}
	if (rte_mempool_get(qat->streampool, stream)) {
		QAT_LOG(ERR, "Couldn't get object from qat stream mempool");
		return -ENOMEM;
	}

	ptr = (struct qat_comp_stream *) *stream;
	qat_comp_stream_reset(ptr);
	ptr->qat_xform.qat_comp_request_type = QAT_COMP_REQUEST_DECOMPRESS;
	ptr->qat_xform.checksum_type = xform->decompress.chksum;

	if (qat_comp_create_templates(&ptr->qat_xform, qat->interm_buff_mz,
				      xform, ptr, RTE_COMP_OP_STATEFUL)) {
		QAT_LOG(ERR, "QAT: problem with creating descriptor template for stream");
		rte_mempool_put(qat->streampool, *stream);
		*stream = NULL;
		return -EINVAL;
	}

	return 0;
}

/**
 * Free driver private stream data.
 *
 * @param dev
 *   Compressdev device
 * @param stream
 *   handle of pmd's private stream data
 * @return
 *  - 0 if successful
 *  - <0 in error cases
 *  - Returns -EINVAL if input parameters are invalid.
 *  - Returns -ENOTSUP if comp device does not support STATEFUL operations.
 *  - Returns -EBUSY if can't free stream as there are inflight operations
 */
int
qat_comp_stream_free(struct rte_compressdev *dev, void *stream)
{
	if (stream) {
		struct qat_comp_dev_private *qat = dev->data->dev_private;
		qat_comp_stream_reset((struct qat_comp_stream *) stream);
		rte_mempool_put(qat->streampool, stream);
		return 0;
	}
	return -EINVAL;
}