From patchwork Fri Jun 29 15:41:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Rybchenko X-Patchwork-Id: 41978 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 28F961B57E; Fri, 29 Jun 2018 17:41:44 +0200 (CEST) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id 766081B557 for ; Fri, 29 Jun 2018 17:41:42 +0200 (CEST) X-Virus-Scanned: Proofpoint Essentials engine Received: from webmail.solarflare.com (webmail.solarflare.com [12.187.104.26]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1-us3.ppe-hosted.com (Proofpoint Essentials ESMTP Server) with ESMTPS id 8064BB8006C for ; Fri, 29 Jun 2018 15:41:41 +0000 (UTC) Received: from ocex03.SolarFlarecom.com (10.20.40.36) by ocex03.SolarFlarecom.com (10.20.40.36) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Fri, 29 Jun 2018 08:41:38 -0700 Received: from opal.uk.solarflarecom.com (10.17.10.1) by ocex03.SolarFlarecom.com (10.20.40.36) with Microsoft SMTP Server (TLS) id 15.0.1044.25 via Frontend Transport; Fri, 29 Jun 2018 08:41:38 -0700 Received: from uklogin.uk.solarflarecom.com (uklogin.uk.solarflarecom.com [10.17.10.10]) by opal.uk.solarflarecom.com (8.13.8/8.13.8) with ESMTP id w5TFfbmd032656 for ; Fri, 29 Jun 2018 16:41:37 +0100 Received: from uklogin.uk.solarflarecom.com (localhost.localdomain [127.0.0.1]) by uklogin.uk.solarflarecom.com (8.13.8/8.13.8) with ESMTP id w5TFfb9F008883 for ; Fri, 29 Jun 2018 16:41:37 +0100 From: Andrew Rybchenko To: Date: Fri, 29 Jun 2018 16:41:30 +0100 Message-ID: <1530286891-8833-1-git-send-email-arybchenko@solarflare.com> X-Mailer: git-send-email 1.8.2.3 MIME-Version: 1.0 X-MDID: 1530286902-Y-33KdJjK2O4 Subject: [dpdk-dev] [PATCH 1/2] net/sfc: support ops to check ready descriptors in ESSB Rx X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Implement EF10 ESSB Rx datapath callback to get number of pending descriptors. Signed-off-by: Andrew Rybchenko Reviewed-by: Ivan Malov --- drivers/net/sfc/sfc_ef10_essb_rx.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/drivers/net/sfc/sfc_ef10_essb_rx.c b/drivers/net/sfc/sfc_ef10_essb_rx.c index dcb5cb24c..257e40db1 100644 --- a/drivers/net/sfc/sfc_ef10_essb_rx.c +++ b/drivers/net/sfc/sfc_ef10_essb_rx.c @@ -404,13 +404,28 @@ sfc_ef10_essb_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, static sfc_dp_rx_qdesc_npending_t sfc_ef10_essb_rx_qdesc_npending; static unsigned int -sfc_ef10_essb_rx_qdesc_npending(__rte_unused struct sfc_dp_rxq *dp_rxq) +sfc_ef10_essb_rx_qdesc_npending(struct sfc_dp_rxq *dp_rxq) { - /* - * Correct implementation requires EvQ polling and events - * processing. - */ - return -ENOTSUP; + struct sfc_ef10_essb_rxq *rxq = sfc_ef10_essb_rxq_by_dp_rxq(dp_rxq); + const unsigned int evq_old_read_ptr = rxq->evq_read_ptr; + efx_qword_t rx_ev; + + if (unlikely(rxq->flags & (SFC_EF10_ESSB_RXQ_NOT_RUNNING | + SFC_EF10_ESSB_RXQ_EXCEPTION))) + return rxq->bufs_pending; + + while (sfc_ef10_essb_rx_event_get(rxq, &rx_ev)) { + /* + * DROP_EVENT is an internal to the NIC, software should + * never see it and, therefore, may ignore it. + */ + sfc_ef10_essb_rx_process_ev(rxq, rx_ev); + } + + sfc_ef10_ev_qclear(rxq->evq_hw_ring, rxq->evq_ptr_mask, + evq_old_read_ptr, rxq->evq_read_ptr); + + return rxq->bufs_pending; } static sfc_dp_rx_qdesc_status_t sfc_ef10_essb_rx_qdesc_status;