From patchwork Mon Sep 27 10:21:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Walsh X-Patchwork-Id: 99770 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 61F39A0547; Mon, 27 Sep 2021 12:23:01 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 97E034113C; Mon, 27 Sep 2021 12:22:23 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by mails.dpdk.org (Postfix) with ESMTP id 22110410ED for ; Mon, 27 Sep 2021 12:22:18 +0200 (CEST) X-IronPort-AV: E=McAfee;i="6200,9189,10119"; a="246937063" X-IronPort-AV: E=Sophos;i="5.85,326,1624345200"; d="scan'208";a="246937063" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2021 03:22:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,326,1624345200"; d="scan'208";a="561166621" Received: from silpixa00401160.ir.intel.com ([10.55.129.96]) by fmsmga002.fm.intel.com with ESMTP; 27 Sep 2021 03:22:17 -0700 From: Conor Walsh To: bruce.richardson@intel.com, fengchengwen@huawei.com, jerinj@marvell.com, kevin.laatz@intel.com Cc: dev@dpdk.org, Conor Walsh Date: Mon, 27 Sep 2021 10:21:55 +0000 Message-Id: <20210927102157.1570116-11-conor.walsh@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210927102157.1570116-1-conor.walsh@intel.com> References: <20210827172550.1522362-1-conor.walsh@intel.com> <20210927102157.1570116-1-conor.walsh@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v6 10/12] dma/ioat: add burst capacity function X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 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" Adds the ability to find the remaining space in the IOAT ring. Signed-off-by: Conor Walsh Signed-off-by: Kevin Laatz Acked-by: Bruce Richardson --- drivers/dma/ioat/ioat_dmadev.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c index fe01a3b1db..6c783ec94f 100644 --- a/drivers/dma/ioat/ioat_dmadev.c +++ b/drivers/dma/ioat/ioat_dmadev.c @@ -509,6 +509,19 @@ ioat_completed_status(struct rte_dma_dev *dev, uint16_t qid __rte_unused, return count; } +/* Get the remaining capacity of the ring. */ +static uint16_t +ioat_burst_capacity(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused) +{ + struct ioat_dmadev *ioat = dev->data->dev_private; + unsigned short size = ioat->qcfg.nb_desc - 1; + unsigned short read = ioat->next_read; + unsigned short write = ioat->next_write; + unsigned short space = size - (write - read); + + return space; +} + /* Retrieve the generic stats of a DMA device. */ static int ioat_stats_get(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused, @@ -594,6 +607,7 @@ ioat_dmadev_create(const char *name, struct rte_pci_device *dev) dmadev->dev_ops = &ioat_dmadev_ops; + dmadev->burst_capacity = ioat_burst_capacity; dmadev->completed = ioat_completed; dmadev->completed_status = ioat_completed_status; dmadev->copy = ioat_enqueue_copy;