From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8716CD6E55 for ; Wed, 3 Jun 2026 18:45:36 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 0969540672; Wed, 3 Jun 2026 20:45:21 +0200 (CEST) Received: from fout-b5-smtp.messagingengine.com (fout-b5-smtp.messagingengine.com [202.12.124.148]) by mails.dpdk.org (Postfix) with ESMTP id 0F3DE4065E for ; Wed, 3 Jun 2026 20:45:20 +0200 (CEST) Received: from phl-compute-04.internal (phl-compute-04.internal [10.202.2.44]) by mailfout.stl.internal (Postfix) with ESMTP id 5EF171D00173; Wed, 3 Jun 2026 14:45:19 -0400 (EDT) Received: from phl-frontend-03 ([10.202.2.162]) by phl-compute-04.internal (MEProxy); Wed, 03 Jun 2026 14:45:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= cc:cc:content-transfer-encoding:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=fm1; t=1780512319; x= 1780598719; bh=AMIOLoSVj9nXqKWdQi/SDTOewxzGMrTIn2ydizdbKQw=; b=V GgoyM/sjdmt5RMgW0W01IiEVAXJ+usb/dK2k5jtVHoQ1qlhw8rRganPOSE+dRumw nlfiEhQIZEyoM+okvLMp1Y/xzpmxhSmUabQobL2lTESxnD4MBBHkSLk+7t5n1Oa6 //Ou5UXdPWGpAPkDRXTVMHvQXOi9DjHeJcGfV4hU8pQAsb2XekMnEjjRRrgrqACf 1SUBNUHZIogkrWnkzQFCrn5UNbfJepNNbL4x4kUEkyiiOVWwYDoqdSdyDiLyGLBp GQI8FoTozl0iSyqn50unIQS9WOFkOzWcU5MCnxNvcyt0OO8Z4CCWGjqASUJvoo6f IUTKo5ZW0vd+wmumcUSJw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to:x-me-proxy:x-me-sender :x-me-sender:x-sasl-enc; s=fm1; t=1780512319; x=1780598719; bh=A MIOLoSVj9nXqKWdQi/SDTOewxzGMrTIn2ydizdbKQw=; b=A/G1WSlvdqmYQi2ad bWu8Bzo6dk0mN//jgyRDB9W4vvc1t24z6u+9BDzSvbqVc+gnWyE2EbXCp9HGucGe o+S9UwyIXApIZxFtYfSSCuNvd3y0h2e6u5Awsouj3km7a+1H0sM2mFXrzDLr1Pfk DZWVLXz/qB3Fy5iQGRfvm+MQToEjt+mphDzjlbdZefUJ2wDO0tZLINeuCYsRitkd x6QyoJG+QDPuXaSuZc57pHVrL3F74GPo8TvWLORoMmWvalApxuIHifzPJWevPvr7 uCfIFA4TmfhO9Xnp8FfeFqGgylIvqlooYTQmC4l1Z6uJEE/M7e83xi3Dx8Ys0Wqt 2IfiA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTGRPVmr02ZOY6TXDg1MuQuWkDVzxAf+LyfdOZgp45gqwdcamVylbKuLph9wZ2TdlD xI5e28kpSkM9VWXLY5KLdG09TPzycMHsUl3ib59XLHVAcBaKlGY1iRrbXEpVCcc8lihtrx JKbyAU+j8UvGUhYymOUdy8mqQ/Auf7rLKeyGKlPAlSMn50VKdKXdaijnyIddCyrJ2ga6/3 Brqd+1mQhS4koQ/PkDRqgL1TtFAlsTXQ49Q1gwlUfTkgyVfjCvgPvNeJPmuWC5lLKV+XMS aSsrX99LlExkhy6QtvbuchMFLc8MN6WMETJb6M2T9s8K7gGW2Jo315f1o/Jn+GtHxhQ9em uzk9qbWEOvZ958x8pfzTNonbrcYj+HfSUVRVF2W2KTJ92/xRJjuOiEX1UvPI2+OoXcjCQl /fedDMzYHJ1iawFx+rodWSwJSH3nd1Rj1WBW4uppygxH6hxqKjqWK9x2iWk4x/bwhTCsHT dxNM//vC9o/Q78+O0kfVlumHsOAANx9RxoLGC7R0HL/gzQuN3tPFl5A45uXhE65fjTAQOr 5YTc1SzOimt/yYRFlJ0GmZOntJDPYtHYZljAYSTSRGYZdhkFW46dgmnjn6tRvHsJrU8xqy pSdckPIXrYa5rQbWf5f191Aw7OXoD3qbBturtyE119pzWSWpt3jd8H8dveYg X-ME-Proxy: Feedback-ID: i47234305:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 3 Jun 2026 14:45:17 -0400 (EDT) From: Thomas Monjalon To: dev@dpdk.org Cc: Stephen Hemminger , Gregory Etelson , Dariusz Sosnowski , Viacheslav Ovsiienko , Bing Zhao , Ori Kam , Suanming Mou , Matan Azrad Subject: [PATCH v7 04/10] common/mlx5: add null MR functions Date: Wed, 3 Jun 2026 20:23:27 +0200 Message-ID: <20260603184503.652030-5-thomas@monjalon.net> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260603184503.652030-1-thomas@monjalon.net> References: <20260202160903.254621-1-getelson@nvidia.com> <20260603184503.652030-1-thomas@monjalon.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 From: Gregory Etelson Add functions to allocate and free a null Memory Region (MR) using ibverbs on Linux. There is no implementation for DevX on Windows. Signed-off-by: Gregory Etelson Signed-off-by: Thomas Monjalon --- drivers/common/mlx5/linux/mlx5_common_verbs.c | 35 +++++++++++++++++++ drivers/common/mlx5/mlx5_common_mr.h | 9 +++++ drivers/common/mlx5/windows/mlx5_common_os.c | 16 +++++++++ 3 files changed, 60 insertions(+) diff --git a/drivers/common/mlx5/linux/mlx5_common_verbs.c b/drivers/common/mlx5/linux/mlx5_common_verbs.c index 2322d9d033..6d44e1f566 100644 --- a/drivers/common/mlx5/linux/mlx5_common_verbs.c +++ b/drivers/common/mlx5/linux/mlx5_common_verbs.c @@ -161,3 +161,38 @@ mlx5_os_set_reg_mr_cb(mlx5_reg_mr_t *reg_mr_cb, mlx5_dereg_mr_t *dereg_mr_cb) *reg_mr_cb = mlx5_common_verbs_reg_mr; *dereg_mr_cb = mlx5_common_verbs_dereg_mr; } + +RTE_EXPORT_INTERNAL_SYMBOL(mlx5_os_alloc_null_mr) +struct mlx5_pmd_mr * +mlx5_os_alloc_null_mr(struct rte_device *dev, void *pd) +{ + struct ibv_mr *ibv_mr; + struct mlx5_pmd_mr *null_mr; + + null_mr = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*null_mr), 0, dev->numa_node); + if (!null_mr) + return NULL; + ibv_mr = mlx5_glue->alloc_null_mr(pd); + if (!ibv_mr) { + mlx5_free(null_mr); + return NULL; + } + *null_mr = (struct mlx5_pmd_mr) { + .lkey = rte_cpu_to_be_32(ibv_mr->lkey), + .addr = ibv_mr->addr, + .len = ibv_mr->length, + .obj = (void *)ibv_mr, + }; + return null_mr; +} + +RTE_EXPORT_INTERNAL_SYMBOL(mlx5_os_free_null_mr) +void +mlx5_os_free_null_mr(struct mlx5_pmd_mr *null_mr) +{ + if (!null_mr) + return; + if (null_mr->obj) + claim_zero(mlx5_glue->dereg_mr(null_mr->obj)); + mlx5_free(null_mr); +} diff --git a/drivers/common/mlx5/mlx5_common_mr.h b/drivers/common/mlx5/mlx5_common_mr.h index cf7c685e9b..00f3d832c3 100644 --- a/drivers/common/mlx5/mlx5_common_mr.h +++ b/drivers/common/mlx5/mlx5_common_mr.h @@ -21,6 +21,8 @@ #include "mlx5_common_mp.h" #include "mlx5_common_defs.h" +struct rte_device; + /* mlx5 PMD MR struct. */ struct mlx5_pmd_mr { uint32_t lkey; @@ -258,6 +260,13 @@ __rte_internal void mlx5_os_set_reg_mr_cb(mlx5_reg_mr_t *reg_mr_cb, mlx5_dereg_mr_t *dereg_mr_cb); +__rte_internal +struct mlx5_pmd_mr * +mlx5_os_alloc_null_mr(struct rte_device *dev, void *pd); +__rte_internal +void +mlx5_os_free_null_mr(struct mlx5_pmd_mr *null_mr); + __rte_internal int mlx5_mr_mempool_register(struct mlx5_common_device *cdev, diff --git a/drivers/common/mlx5/windows/mlx5_common_os.c b/drivers/common/mlx5/windows/mlx5_common_os.c index 16fcc5f9fc..692517a9bf 100644 --- a/drivers/common/mlx5/windows/mlx5_common_os.c +++ b/drivers/common/mlx5/windows/mlx5_common_os.c @@ -454,6 +454,22 @@ mlx5_os_set_reg_mr_cb(mlx5_reg_mr_t *reg_mr_cb, mlx5_dereg_mr_t *dereg_mr_cb) *dereg_mr_cb = mlx5_os_dereg_mr; } +RTE_EXPORT_INTERNAL_SYMBOL(mlx5_os_alloc_null_mr) +struct mlx5_pmd_mr * +mlx5_os_alloc_null_mr(struct rte_device *dev, void *pd) +{ + RTE_SET_USED(dev); + RTE_SET_USED(pd); + return NULL; +} + +RTE_EXPORT_INTERNAL_SYMBOL(mlx5_os_free_null_mr) +void +mlx5_os_free_null_mr(struct mlx5_pmd_mr *null_mr) +{ + RTE_SET_USED(null_mr); +} + /* * In Windows, no need to wrap the MR, no known issue for it in kernel. * Use the regular function to create direct MR. -- 2.54.0