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 99354CD6E5D for ; Tue, 2 Jun 2026 21:50:51 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A197F4066D; Tue, 2 Jun 2026 23:50:43 +0200 (CEST) Received: from fout-b2-smtp.messagingengine.com (fout-b2-smtp.messagingengine.com [202.12.124.145]) by mails.dpdk.org (Postfix) with ESMTP id 29D6040687 for ; Tue, 2 Jun 2026 23:50:42 +0200 (CEST) Received: from phl-compute-02.internal (phl-compute-02.internal [10.202.2.42]) by mailfout.stl.internal (Postfix) with ESMTP id 818091D0007D; Tue, 2 Jun 2026 17:50:41 -0400 (EDT) Received: from phl-frontend-03 ([10.202.2.162]) by phl-compute-02.internal (MEProxy); Tue, 02 Jun 2026 17:50:41 -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=1780437041; x= 1780523441; bh=AMIOLoSVj9nXqKWdQi/SDTOewxzGMrTIn2ydizdbKQw=; b=f 9FGSCg/tYkFvad71XtMTzC86e5udiRESCda0lBMutE/ys/7QUuutTUi5OryZJZLv eTZAsR2/H6eI5i8yAPkCAwNA4v/c2OXEeovl2F0+68oGFxTmG8P7UV87OCxJ4uWs 8mcTpv35yfJ4xNUSss4g9KOKdhnP2qb6Ghb+rqlnWNEifRxOEPnau3AVUz/EyPXb IukvL+m4U83np5TvgqQTOuvh2KxbHkMZYfdiqWUwxpDByrRg+dsvyO5foarpju54 5aayEIEC8LC+hyXKF5nE4R4A8hPI508Ue8SNsySqkXKB6toz3Go/UadvzcXHs+qk 46I3r1VEEt5c7t9U9s8LA== 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=1780437041; x=1780523441; bh=A MIOLoSVj9nXqKWdQi/SDTOewxzGMrTIn2ydizdbKQw=; b=j6/sybxs4Ix3huR0S GKY8LB+vKOkCm/gKp6Mx8vQdDEZJZzwlDdUoGXHPw/4AaJrVPIwArknlK84M2uLc jleSRs1Lx+2JpmJeJsSnj+8BQz7iehiAx6AHYwNrZkmwRnSqilzOY94Z27MQDaxX urDJWNkv1FCzUvUaOWvoFSXLOVQlt0clrr0N5YL6C1R2VgOkL8wDSPWjo0M7bAwy s7jdjEbxKraDUTXldg8INTB/mdMvb/1ziVEgpIv7elBlOYGh4JEIQRgycX9FpgE7 TsyGyQjN+Id1dhezV650X2GzPZ6/5AkY/icnwEmB8ViJ5D6E3hzWaRqjvA7d2loW U928Q== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTEWgN7vY0qxXSIGoPtkqbliCd07gCwDXaAFyfIadDsxG5KTXk0IG937mGINDuISj6 8siMnQIFFhsky2ekQFCMc7UKygoaWEtPQv0YsVRVJQZTkcLj9V3JN8xn9N2mu+0IDOvEQW z4FwTG8ldr00xE6wkuEt636h954PV0JbuIWEJ3F4gG9WbJu14Iak4RZ5GaJ0wkh/VUYmhC YvOy0xVJ7ExfY7AFojsN+R4oo0qjAkVzR/cXVqIMHzaAodZeorkqRGCddtkfiBANvl+iFK dbTm6sVDPN4283au7Ixy9eoyX58iY90Sk4ApdtDtt/G+LdHsG8TgbrqocCeB3g3GihzIAI 7c4+VRPIgA1g2OSXbBgX/qKw0UnUTJo1LMfrhf8JRvUwv5uxyN7CZ7qTTN9OFcpQ0q2akt d4Tj40OgkBFfBEw5LsutVYxFtx3pXCj+Iii3oBWAsHm4H5RM58gFNf/z6AhoolGIo5HQLh 3DhlzniooN3n7djptILsbJfc759LWh8CgyShsdN1c7H2elQwe+NngL0x6x024TzfIhR1Sp pdov1BMPMHba6TwjM8PgD42a9CtMU9YuX5L1qOlw0bSpvGE54lqSNscqXCcQG/udjkvkPH P1rwHdzlT5CFns7XHNwGCxNsdm0XaxTZy+n60NHH59SRWnT5Jo0mINST4+Tw X-ME-Proxy: Feedback-ID: i47234305:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 2 Jun 2026 17:50:39 -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 v6 04/10] common/mlx5: add null MR functions Date: Tue, 2 Jun 2026 23:49:16 +0200 Message-ID: <20260602215022.3698662-5-thomas@monjalon.net> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260602215022.3698662-1-thomas@monjalon.net> References: <20260202160903.254621-1-getelson@nvidia.com> <20260602215022.3698662-1-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