From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Kulasek Subject: [PATCH 1/4] rte_mbuf: add rte_pktmbuf_coalesce Date: Fri, 2 Dec 2016 18:07:43 +0100 Message-ID: <1480698466-17620-2-git-send-email-tomaszx.kulasek@intel.com> References: <1480698466-17620-1-git-send-email-tomaszx.kulasek@intel.com> To: dev@dpdk.org Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 71A84689B for ; Fri, 2 Dec 2016 18:07:56 +0100 (CET) In-Reply-To: <1480698466-17620-1-git-send-email-tomaszx.kulasek@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch adds function rte_pktmbuf_coalesce to let crypto PMD coalesce chained mbuf before crypto operation and extend their capabilities to support segmented mbufs when device cannot handle them natively. Signed-off-by: Tomasz Kulasek --- lib/librte_mbuf/rte_mbuf.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index ead7c6e..f048681 100644 --- a/lib/librte_mbuf/rte_mbuf.h +++ b/lib/librte_mbuf/rte_mbuf.h @@ -1647,6 +1647,40 @@ static inline int rte_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *tail } /** + * Coalesce data from mbuf to the continuous buffer. + * + * @param mbuf_dst + * Contiguous destination mbuf + * @param mbuf_src + * Uncontiguous source mbuf + * + * @return + * - 0, on success + * - -EINVAL, on error + */ + +#include + +static inline int +rte_pktmbuf_coalesce(struct rte_mbuf *mbuf_dst, struct rte_mbuf *mbuf_src) +{ + char *dst; + + if (!rte_pktmbuf_is_contiguous(mbuf_dst) || + rte_pktmbuf_data_len(mbuf_dst) >= + rte_pktmbuf_pkt_len(mbuf_src)) + return -EINVAL; + + dst = rte_pktmbuf_mtod(mbuf_dst, char *); + + if (!__rte_pktmbuf_read(mbuf_src, 0, rte_pktmbuf_pkt_len(mbuf_src), + dst)) + return -EINVAL; + + return 0; +} + +/** * Dump an mbuf structure to a file. * * Dump all fields for the given packet mbuf and all its associated -- 1.7.9.5