From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 32D3AA0C46; Fri, 17 Sep 2021 15:31:26 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 99C5F410FC; Fri, 17 Sep 2021 15:31:16 +0200 (CEST) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by mails.dpdk.org (Postfix) with ESMTP id E9CCF410F8 for ; Fri, 17 Sep 2021 15:31:14 +0200 (CEST) X-IronPort-AV: E=McAfee;i="6200,9189,10109"; a="283805327" X-IronPort-AV: E=Sophos;i="5.85,301,1624345200"; d="scan'208";a="283805327" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Sep 2021 06:31:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,301,1624345200"; d="scan'208";a="701256296" Received: from silpixa00399126.ir.intel.com ([10.237.223.29]) by fmsmga005.fm.intel.com with ESMTP; 17 Sep 2021 06:31:12 -0700 From: Bruce Richardson To: dev@dpdk.org Cc: conor.walsh@intel.com, kevin.laatz@intel.com, fengchengwen@huawei.com, jerinj@marvell.com, Bruce Richardson Date: Fri, 17 Sep 2021 14:30:50 +0100 Message-Id: <20210917133056.90326-4-bruce.richardson@intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210917133056.90326-1-bruce.richardson@intel.com> References: <20210826183301.333442-1-bruce.richardson@intel.com> <20210917133056.90326-1-bruce.richardson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v4 3/9] dmadev: add device iterator 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" Add a function and wrapper macro to iterate over all dma devices. Signed-off-by: Bruce Richardson --- lib/dmadev/rte_dmadev.c | 13 +++++++++++++ lib/dmadev/rte_dmadev.h | 18 ++++++++++++++++++ lib/dmadev/version.map | 1 + 3 files changed, 32 insertions(+) diff --git a/lib/dmadev/rte_dmadev.c b/lib/dmadev/rte_dmadev.c index ed342e0d32..ba189f3539 100644 --- a/lib/dmadev/rte_dmadev.c +++ b/lib/dmadev/rte_dmadev.c @@ -55,6 +55,19 @@ rte_dma_dev_max(size_t dev_max) return 0; } +uint16_t +rte_dma_next_dev(uint16_t start_dev_id) +{ + uint16_t dev_id = start_dev_id; + while (dev_id < dma_devices_max && rte_dma_devices[dev_id].state == RTE_DMA_DEV_UNUSED) + dev_id++; + + if (dev_id < dma_devices_max) + return dev_id; + + return UINT16_MAX; +} + static int dma_check_name(const char *name) { diff --git a/lib/dmadev/rte_dmadev.h b/lib/dmadev/rte_dmadev.h index be4bb18ee6..d262b8ed8d 100644 --- a/lib/dmadev/rte_dmadev.h +++ b/lib/dmadev/rte_dmadev.h @@ -219,6 +219,24 @@ bool rte_dma_is_valid(int16_t dev_id); __rte_experimental uint16_t rte_dma_count_avail(void); +/** + * Iterates over valid dmadev instances. + * + * @param start_dev_id + * The id of the next possible dmadev. + * @return + * Next valid dmadev, UINT16_MAX if there is none. + */ +__rte_experimental +uint16_t rte_dma_next_dev(uint16_t start_dev_id); + +/** Utility macro to iterate over all available dmadevs */ +#define RTE_DMA_FOREACH_DEV(p) \ + for (p = rte_dma_next_dev(0); \ + (uint16_t)p < UINT16_MAX; \ + p = rte_dma_next_dev(p + 1)) + + /** DMA device support memory-to-memory transfer. * * @see struct rte_dma_info::dev_capa diff --git a/lib/dmadev/version.map b/lib/dmadev/version.map index 66420c4ede..0ab570a1be 100644 --- a/lib/dmadev/version.map +++ b/lib/dmadev/version.map @@ -15,6 +15,7 @@ EXPERIMENTAL { rte_dma_get_dev_id; rte_dma_info_get; rte_dma_is_valid; + rte_dma_next_dev; rte_dma_start; rte_dma_stats_get; rte_dma_stats_reset; -- 2.30.2