Author: mw Date: Wed Nov 18 15:02:12 2020 New Revision: 367800 URL: https://svnweb.freebsd.org/changeset/base/367800
Log: Add Rx offsets support for the ENA driver For the first descriptor in a chain the data may start at an offset. It is optional feature of some devices, so the driver must ack that it supports it. The data pointer of the mbuf is simply shifted by the given value. Submitted by: Maciej Bielski <m...@semihalf.com> Submitted by: Michal Krawczyk <m...@semihalf.com> Obtained from: Semihalf Sponsored by: Amazon, Inc MFC after: 1 week Differential revision: https://reviews.freebsd.org/D27116 Modified: head/sys/dev/ena/ena.c head/sys/dev/ena/ena_datapath.c Modified: head/sys/dev/ena/ena.c ============================================================================== --- head/sys/dev/ena/ena.c Wed Nov 18 14:59:22 2020 (r367799) +++ head/sys/dev/ena/ena.c Wed Nov 18 15:02:12 2020 (r367800) @@ -2797,6 +2797,8 @@ ena_config_host_info(struct ena_com_dev *ena_dev, devi (DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) | (DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT); host_info->num_cpus = mp_ncpus; + host_info->driver_supported_features = + ENA_ADMIN_HOST_INFO_RX_OFFSET_MASK; rc = ena_com_set_host_attributes(ena_dev); if (unlikely(rc != 0)) { Modified: head/sys/dev/ena/ena_datapath.c ============================================================================== --- head/sys/dev/ena/ena_datapath.c Wed Nov 18 14:59:22 2020 (r367799) +++ head/sys/dev/ena/ena_datapath.c Wed Nov 18 15:02:12 2020 (r367800) @@ -431,6 +431,10 @@ ena_rx_mbuf(struct ena_ring *rx_ring, struct ena_com_r mbuf->m_flags |= M_PKTHDR; mbuf->m_pkthdr.len = len; mbuf->m_len = len; + // Only for the first segment the data starts at specific offset + mbuf->m_data = mtodo(mbuf, ena_rx_ctx->pkt_offset); + ena_trace(NULL, ENA_DBG | ENA_RXPTH, + "Mbuf data offset=%u\n", ena_rx_ctx->pkt_offset); mbuf->m_pkthdr.rcvif = rx_ring->que->adapter->ifp; /* Fill mbuf with hash key and it's interpretation for optimization */ @@ -575,6 +579,8 @@ ena_rx_cleanup(struct ena_ring *rx_ring) ena_rx_ctx.ena_bufs = rx_ring->ena_bufs; ena_rx_ctx.max_bufs = adapter->max_rx_sgl_size; ena_rx_ctx.descs = 0; + ena_rx_ctx.pkt_offset = 0; + bus_dmamap_sync(io_cq->cdesc_addr.mem_handle.tag, io_cq->cdesc_addr.mem_handle.map, BUS_DMASYNC_POSTREAD); rc = ena_com_rx_pkt(io_cq, io_sq, &ena_rx_ctx); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
