net/octeontx2: fix PTP performance

[dpdk.git] / drivers / event / octeontx2 / otx2_worker_dual.h

diff --git a/drivers/event/octeontx2/otx2_worker_dual.h b/drivers/event/octeontx2/otx2_worker_dual.h
index 4a72f42..5134e3d 100644 (file)
--- a/drivers/event/octeontx2/otx2_worker_dual.h
+++ b/drivers/event/octeontx2/otx2_worker_dual.h
@@ -21,6 +21,7 @@ otx2_ssogws_dual_get_work(struct otx2_ssogws_state *ws,
 {
        const uint64_t set_gw = BIT_ULL(16) | 1;
        union otx2_sso_event event;
+       uint64_t tstamp_ptr;
        uint64_t get_work1;
        uint64_t mbuf;
 
@@ -70,8 +71,17 @@ otx2_ssogws_dual_get_work(struct otx2_ssogws_state *ws,
            event.event_type == RTE_EVENT_TYPE_ETHDEV) {
                otx2_wqe_to_mbuf(get_work1, mbuf, event.sub_event_type,
                                 (uint32_t) event.get_work0, flags, lookup_mem);
-               /* Extracting tstamp, if PTP enabled*/
-               otx2_nix_mbuf_to_tstamp((struct rte_mbuf *)mbuf, tstamp, flags);
+               /* Extracting tstamp, if PTP enabled. CGX will prepend the
+                * timestamp at starting of packet data and it can be derieved
+                * from WQE 9 dword which corresponds to SG iova.
+                * rte_pktmbuf_mtod_offset can be used for this purpose but it
+                * brings down the performance as it reads mbuf->buf_addr which
+                * is not part of cache in general fast path.
+                */
+               tstamp_ptr = *(uint64_t *)(((struct nix_wqe_hdr_s *)get_work1)
+                                            + OTX2_SSO_WQE_SG_PTR);
+               otx2_nix_mbuf_to_tstamp((struct rte_mbuf *)mbuf, tstamp, flags,
+                                       (uint64_t *)tstamp_ptr);
                get_work1 = mbuf;
        }