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 931C6CD6E75 for ; Thu, 4 Jun 2026 19:33:57 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 7050D4066E; Thu, 4 Jun 2026 21:33:39 +0200 (CEST) Received: from fhigh-a1-smtp.messagingengine.com (fhigh-a1-smtp.messagingengine.com [103.168.172.152]) by mails.dpdk.org (Postfix) with ESMTP id 043BA4066E for ; Thu, 4 Jun 2026 21:33:38 +0200 (CEST) Received: from phl-compute-06.internal (phl-compute-06.internal [10.202.2.46]) by mailfhigh.phl.internal (Postfix) with ESMTP id 8203D1400129; Thu, 4 Jun 2026 15:33:37 -0400 (EDT) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-06.internal (MEProxy); Thu, 04 Jun 2026 15:33:37 -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=1780601617; x= 1780688017; bh=AMIOLoSVj9nXqKWdQi/SDTOewxzGMrTIn2ydizdbKQw=; b=p mdbFYo/HQYdfms7KpeL9/RPsled553cud+h1w/WpM/wRxxk932hPZVkDBN6p++ZO aDxfK5cMprFkIA5ZWFdyLpwTKHcZjQh4k4OeF4CK2vxT42MeCKBAjDlLzguhIs51 sXS0SI3SSGBqrOgirvOXfguWXLNXytOlJB8KglHKtsGOeJQtN8X8mKR/GnR24mWB VztVoei/rp5REm8thZeQKhqyhHIFb8gd8l1YMjMqufp8Yzml4JLEWk4L/u6Skewj T1MiZoQFByEBvJ7Ul/snYE0OSELI7MU5xfxA0m0CgwYwszJJq/rSurUgMZKlcO3f eKE4I555CFPyfHDiQOmlA== 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=1780601617; x=1780688017; bh=A MIOLoSVj9nXqKWdQi/SDTOewxzGMrTIn2ydizdbKQw=; b=DwOJ+Vqd6kjgG4bwF MkYvLTpHvpoG7aVi64Cexnud/zBS8rNoxt5Q415asPD2N/DlkgwR7KoDGuX2PUvh ne4FbLdhYERKe0V2UCPfEEHyLLbNEz3M0vaoq2wAdxafZOTdhuAT6j631JbomsCp 177rcfPdUDx/J5Z8N94pk4wBgwEuk9gnDrGRdFg3kr6q/PDrHdigpS0hwsPgzWH/ kihDdjbNde/UDeOuZtxiZZBdX217GYLWI7AHwlgY42lB5KYznfKNT1VbezU9oFhH sLpqjlwAzMHFtYVnFsI+sv+Y//rUC87xSvdL4B4nVpk6gl8rIcZJx1Np9ma33RHH jNcxA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTFTKjf70F4CfZf0i0IrcnOM4y3sOJ9HAHEu+RcmAz6p+UG1GMSF6nnV0agwB3ynt5 QY9dd8QfgYMYr5edihn3B4MSqhoa1fvWfpml0Fv2XnT37uyTGEqeu1W/C6Bf4Nk8rPhfG8 EHSROTbFTHO/SEZX9Tz8fjnEtZCN64hdXUUHeQKgsh/thN/gILTC0Ft9bUCeaaJU2kZft7 ywXniMP7dv14K06hzhP26/4Mzqb+TwlYAtfBB0ltbiDBP3SclzIbLqq8BdPwvrv3e8VQYC YsozftbMHT5nlBTEdC0lfvGJy/OeT2TqUri7YWV+o6fnMeN6GGiTzI3ZSyyxBx5k5v95mb zE3sOdI62K5aZ7IiFrCzU2xqYgcNhOMsVhubO/kdVYWfm8TclUyVYu8WQHJ1G5uYY97jg+ v7hIg6fpBxBxAkvFd6oEy/iepW6dj3IMWPledIcwnXL/U/JLwoShFcgnqdoe/+RHTNty9E 4VW+XiPaSh21aJjdtHE5ADNhEp01DrmOHiL+2/at09fv+patcR5QFP5mGmfABVBGxMKohI UcZVNnpd5FfpsSVKdjNjPM35/5DYhlR2Dy5vqEugPRQUK3IKC43/SxM0qelvjgCsZkaUy/ XhNRsjSfaFqf6TLvMZIzIwQEGP0hGrt2PZMlBwCr9/Cvv7pc4CD6kyUcoy5w X-ME-Proxy: Feedback-ID: i47234305:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 4 Jun 2026 15:33:36 -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 v8 4/9] common/mlx5: add null MR functions Date: Thu, 4 Jun 2026 21:30:56 +0200 Message-ID: <20260604193324.1996141-5-thomas@monjalon.net> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260604193324.1996141-1-thomas@monjalon.net> References: <20260202160903.254621-1-getelson@nvidia.com> <20260604193324.1996141-1-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