From mboxrd@z Thu Jan 1 00:00:00 1970 From: Santosh Shukla Subject: [PATCH v5 6/8] mempool: detect physical contiguous object in pool Date: Wed, 6 Sep 2017 16:58:32 +0530 Message-ID: <20170906112834.32378-7-santosh.shukla@caviumnetworks.com> References: <20170815060743.21076-1-santosh.shukla@caviumnetworks.com> <20170906112834.32378-1-santosh.shukla@caviumnetworks.com> Mime-Version: 1.0 Content-Type: text/plain Cc: thomas@monjalon.net, jerin.jacob@caviumnetworks.com, hemant.agrawal@nxp.com, Santosh Shukla To: olivier.matz@6wind.com, dev@dpdk.org Return-path: Received: from NAM01-BY2-obe.outbound.protection.outlook.com (mail-by2nam01on0067.outbound.protection.outlook.com [104.47.34.67]) by dpdk.org (Postfix) with ESMTP id 55EAF2C17 for ; Wed, 6 Sep 2017 13:29:32 +0200 (CEST) In-Reply-To: <20170906112834.32378-1-santosh.shukla@caviumnetworks.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" The memory area containing all the objects must be physically contiguous. Introducing MEMPOOL_F_CAPA_PHYS_CONTIG flag for such use-case. The flag useful to detect whether pool area has sufficient space to fit all objects. If not then return -ENOSPC. This way, we make sure that all object within a pool is contiguous. Signed-off-by: Santosh Shukla Signed-off-by: Jerin Jacob --- v4 --> v5: - Pulled example api description mentioned by Olivier, I find it more correct description as used that as is in the patch. Refer [1]. [1] http://dpdk.org/dev/patchwork/patch/27599/ lib/librte_mempool/rte_mempool.c | 10 ++++++++++ lib/librte_mempool/rte_mempool.h | 6 ++++++ 2 files changed, 16 insertions(+) diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c index 3c4a096b7..103fbd0ed 100644 --- a/lib/librte_mempool/rte_mempool.c +++ b/lib/librte_mempool/rte_mempool.c @@ -369,6 +369,16 @@ rte_mempool_populate_phys(struct rte_mempool *mp, char *vaddr, total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size; + /* Detect pool area has sufficient space for elements */ + if (mp->flags & MEMPOOL_F_CAPA_PHYS_CONTIG) { + if (len < total_elt_sz * mp->size) { + RTE_LOG(ERR, MEMPOOL, + "pool area %" PRIx64 " not enough\n", + (uint64_t)len); + return -ENOSPC; + } + } + memhdr = rte_zmalloc("MEMPOOL_MEMHDR", sizeof(*memhdr), 0); if (memhdr == NULL) return -ENOMEM; diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h index 4fb538962..63688faff 100644 --- a/lib/librte_mempool/rte_mempool.h +++ b/lib/librte_mempool/rte_mempool.h @@ -265,6 +265,12 @@ struct rte_mempool { #define MEMPOOL_F_SC_GET 0x0008 /**< Default get is "single-consumer".*/ #define MEMPOOL_F_POOL_CREATED 0x0010 /**< Internal: pool is created. */ #define MEMPOOL_F_NO_PHYS_CONTIG 0x0020 /**< Don't need physically contiguous objs. */ +/** + * This capability flag is advertised by a mempool handler, if the whole + * memory area containing the objects must be physically contiguous. + * Note: This flag should not be passed by application. + */ +#define MEMPOOL_F_CAPA_PHYS_CONTIG 0x0040 /** * @internal When debug is enabled, store some statistics. -- 2.11.0