net/memif: use common macros for cache line marker
[dpdk.git] / drivers / compress / qat / qat_comp.c
index 32ca753..533e34f 100644 (file)
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2018 Intel Corporation
+ * Copyright(c) 2018-2019 Intel Corporation
  */
 
 #include <rte_mempool.h>
@@ -27,22 +27,75 @@ qat_comp_build_request(void *in_op, uint8_t *out_msg,
        struct rte_comp_op *op = in_op;
        struct qat_comp_op_cookie *cookie =
                        (struct qat_comp_op_cookie *)op_cookie;
-       struct qat_comp_xform *qat_xform = op->private_xform;
-       const uint8_t *tmpl = (uint8_t *)&qat_xform->qat_comp_req_tmpl;
+       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 (unlikely(op->op_type != RTE_COMP_OP_STATELESS)) {
-               QAT_DP_LOG(ERR, "QAT PMD only supports stateless compression "
-                               "operation requests, op (%p) is not a "
-                               "stateless operation.", op);
-               op->status = RTE_COMP_OP_STATUS_INVALID_ARGS;
-               return -EINVAL;
+       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) -
@@ -55,25 +108,85 @@ qat_comp_build_request(void *in_op, uint8_t *out_msg,
                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,
+                               cookie->qat_sgl_src_d,
                                op->src.length,
-                               RTE_PMD_QAT_COMP_SGL_MAX_SEGMENTS);
+                               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,
+                               cookie->qat_sgl_dst_d,
                                comp_req->comp_pars.out_buffer_sz,
-                               RTE_PMD_QAT_COMP_SGL_MAX_SEGMENTS);
+                               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;
                }
 
@@ -98,6 +211,18 @@ qat_comp_build_request(void *in_op, uint8_t *out_msg,
                    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 ?
@@ -109,18 +234,31 @@ qat_comp_build_request(void *in_op, uint8_t *out_msg,
 }
 
 int
-qat_comp_process_response(void **op, uint8_t *resp, uint64_t *dequeue_err_count)
+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_xform *qat_xform = (struct qat_comp_xform *)
-                               (rx_op->private_xform);
+       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 ?
@@ -129,6 +267,17 @@ qat_comp_process_response(void **op, uint8_t *resp, uint64_t *dequeue_err_count)
                        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(
@@ -156,15 +305,51 @@ qat_comp_process_response(void **op, uint8_t *resp, uint64_t *dequeue_err_count)
                int8_t xlat_err_code =
                        (int8_t)resp_msg->comn_resp.comn_error.xlat_err_code;
 
-               if ((cmp_err_code == ERR_CODE_OVERFLOW_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))
-                       rx_op->status =
+                    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
+                       } else
+                               rx_op->status =
+                               RTE_COMP_OP_STATUS_OUT_OF_SPACE_TERMINATED;
+               } else
                        rx_op->status = RTE_COMP_OP_STATUS_ERROR;
 
                ++(*dequeue_err_count);
@@ -177,6 +362,8 @@ qat_comp_process_response(void **op, uint8_t *resp, uint64_t *dequeue_err_count)
                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)
@@ -199,6 +386,12 @@ 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)
 {
@@ -219,7 +412,9 @@ static void qat_comp_create_req_hdr(struct icp_qat_fw_comn_req_hdr *header,
 
 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 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;
@@ -231,6 +426,18 @@ static int qat_comp_create_templates(struct qat_comp_xform *qat_xform,
                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;
@@ -278,12 +485,43 @@ static int qat_comp_create_templates(struct qat_comp_xform *qat_xform,
        qat_comp_create_req_hdr(&comp_req->comn_hdr,
                                        qat_xform->qat_comp_request_type);
 
-       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);
+       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(
@@ -399,7 +637,8 @@ qat_comp_private_xform_create(struct rte_compressdev *dev,
                qat_xform->checksum_type = xform->decompress.chksum;
        }
 
-       if (qat_comp_create_templates(qat_xform, qat->interm_buff_mz, xform)) {
+       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;
        }
@@ -434,3 +673,102 @@ qat_comp_private_xform_free(struct rte_compressdev *dev __rte_unused,
        }
        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;
+}