From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 3F0DCA05D3 for ; Wed, 24 Apr 2019 10:07:36 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id DBB421B3AD; Wed, 24 Apr 2019 10:07:34 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 0D1121B3A1 for ; Wed, 24 Apr 2019 10:07:32 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Apr 2019 01:07:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,389,1549958400"; d="scan'208";a="164355392" Received: from dpdk-xiao-1.sh.intel.com ([10.67.111.145]) by fmsmga002.fm.intel.com with ESMTP; 24 Apr 2019 01:07:31 -0700 From: Xiao Wang To: qi.z.zhang@intel.com Cc: dev@dpdk.org, ferruh.yigit@intel.com, Xiao Wang Date: Wed, 24 Apr 2019 15:51:36 +0800 Message-Id: <20190424075136.10740-1-xiao.w.wang@intel.com> X-Mailer: git-send-email 2.15.1 Subject: [dpdk-dev] [PATCH] net/fm10k: support Rx queue count API 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" Content-Type: text/plain; charset="UTF-8" Message-ID: <20190424075136.EOw1aI20NY-NVDglllruZeZLR1JpX5JqqBem4m0aBus@z> Some application, e.g. the l3fwd-power sample uses rte_eth_rx_queue_count() API to get the get the number of used descriptors of a Rx queue. This patch adds fm10k implementation for this API. Signed-off-by: Xiao Wang --- drivers/net/fm10k/fm10k.h | 3 +++ drivers/net/fm10k/fm10k_ethdev.c | 1 + drivers/net/fm10k/fm10k_rxtx.c | 27 +++++++++++++++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/drivers/net/fm10k/fm10k.h b/drivers/net/fm10k/fm10k.h index dc814855d..b633b307b 100644 --- a/drivers/net/fm10k/fm10k.h +++ b/drivers/net/fm10k/fm10k.h @@ -323,6 +323,9 @@ uint16_t fm10k_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t fm10k_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts); +uint32_t +fm10k_dev_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id); + int fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset); diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c index caf4d1bc0..47c20c5b2 100644 --- a/drivers/net/fm10k/fm10k_ethdev.c +++ b/drivers/net/fm10k/fm10k_ethdev.c @@ -2819,6 +2819,7 @@ static const struct eth_dev_ops fm10k_eth_dev_ops = { .rx_queue_release = fm10k_rx_queue_release, .tx_queue_setup = fm10k_tx_queue_setup, .tx_queue_release = fm10k_tx_queue_release, + .rx_queue_count = fm10k_dev_rx_queue_count, .rx_descriptor_done = fm10k_dev_rx_descriptor_done, .rx_descriptor_status = fm10k_dev_rx_descriptor_status, .tx_descriptor_status = fm10k_dev_tx_descriptor_status, diff --git a/drivers/net/fm10k/fm10k_rxtx.c b/drivers/net/fm10k/fm10k_rxtx.c index fb02e1152..cc95f9589 100644 --- a/drivers/net/fm10k/fm10k_rxtx.c +++ b/drivers/net/fm10k/fm10k_rxtx.c @@ -366,6 +366,33 @@ fm10k_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, return nb_rcv; } +uint32_t +fm10k_dev_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id) +{ +#define FM10K_RXQ_SCAN_INTERVAL 4 + volatile union fm10k_rx_desc *rxdp; + struct fm10k_rx_queue *rxq; + uint16_t desc = 0; + + rxq = dev->data->rx_queues[rx_queue_id]; + rxdp = &rxq->hw_ring[rxq->next_dd]; + while ((desc < rxq->nb_desc) && + rxdp->w.status & rte_cpu_to_le_16(FM10K_RXD_STATUS_DD)) { + /** + * Check the DD bit of a rx descriptor of each group of 4 desc, + * to avoid checking too frequently and downgrading performance + * too much. + */ + desc += FM10K_RXQ_SCAN_INTERVAL; + rxdp += FM10K_RXQ_SCAN_INTERVAL; + if (rxq->next_dd + desc >= rxq->nb_desc) + rxdp = &rxq->hw_ring[rxq->next_dd + desc - + rxq->nb_desc]; + } + + return desc; +} + int fm10k_dev_rx_descriptor_done(void *rx_queue, uint16_t offset) { -- 2.15.1