compress/qat: add fallback to fixed compression

[dpdk.git] / drivers / compress / qat / qat_comp.c

diff --git a/drivers/compress/qat/qat_comp.c b/drivers/compress/qat/qat_comp.c
index 32ca753..b9367d3 100644 (file)
--- a/drivers/compress/qat/qat_comp.c
+++ b/drivers/compress/qat/qat_comp.c
@@ -43,6 +43,30 @@ qat_comp_build_request(void *in_op, uint8_t *out_msg,
        rte_mov128(out_msg, tmpl);
        comp_req->comn_mid.opaque_data = (uint64_t)(uintptr_t)op;
 
+       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) -