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 AA095CD6E7E for ; Fri, 5 Jun 2026 23:35:33 +0000 (UTC) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 80DFD40685; Sat, 6 Jun 2026 01:35:18 +0200 (CEST) Received: from fhigh-a4-smtp.messagingengine.com (fhigh-a4-smtp.messagingengine.com [103.168.172.155]) by mails.dpdk.org (Postfix) with ESMTP id B436A40685 for ; Sat, 6 Jun 2026 01:35:17 +0200 (CEST) Received: from phl-compute-06.internal (phl-compute-06.internal [10.202.2.46]) by mailfhigh.phl.internal (Postfix) with ESMTP id 4D65D140012B; Fri, 5 Jun 2026 19:35:17 -0400 (EDT) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-06.internal (MEProxy); Fri, 05 Jun 2026 19:35:17 -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=1780702517; x= 1780788917; bh=hmw3dMoTuwxA/XrAy3sI+Ks+DzGP8HpOzWly7FCzsAo=; b=P 9L4GNw80L+NlDpNqg+wmROq9/L+3jFeucF8YikExZDBzJ37icQHs4ipZBn5/twlC sa9uJ/LdI0fhxnENJoPHPx0roTyomds+dPc/QkTMjALFuOYsSohrUD3HtiqCHhlf qWiXx+jARG4F5413kQ63EmZc+HsA/oc0jPtOY/i9IfzhaU/hiv48CmKrPv8LNPv2 AVN1QpP7UyVYoSiEiLc6xmK84DrFqxUkV6jqFiDWFx5oLgo8CMGTp1fFEnL68w5G YT63PtwReYDDW/l9B9RcDMh0s/1UZSrASJNWBSkthzI4ssD15wlataiCeoxVBLFK 66xEhcPjD/nqDYRUnPcPw== 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=1780702517; x=1780788917; bh=h mw3dMoTuwxA/XrAy3sI+Ks+DzGP8HpOzWly7FCzsAo=; b=YjO89qpFDU1LK7LVS ovZQ7bGa3r9DnMNez3hp8qrc4k6JA7xzAFYicwhNPrNZN/GYDNUD/cm38p0xz9AY 3cREUhTEw7mXWoyvl8Prht6FF6pVag7ys20y+mdeG281mc9meUYPnWwRE1gkpFI5 OQEhFrr7wsDzbE6GIzr/OQL3yMJeYaeV5GtVQBF/giJVDc1k6L/pi76RU5S7buTe tHJdqBdtfWaW5hesoodKRvfZJWn3a9nvyQU+jNAuoD8igpkQbcE8ZXKyNqRNvvnU Ya9nv2ktgpvOuzfIsBV9WACjlMdlrbgK/49TcelRDz0Q6vp/phrUZ5yb754O7zTh W/FoQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTEohfhF4JQT6K3lbd4KzlNmOFw4c71Kzeh8msZSXZrwt4LS5VL4TDIcQ3WCgjFzG0 GqdsfWRK3to8weNrJ060oz/HR+7CxnqzkOtx+F4cEnYcSgItceW/zy4RgKVS6yYQa8JeCn 2HKyuJK7q+JA8EyKkwKe+Sw5WWKOy/yfVH1o22WMSQjrbPzogw1z3yVPKY3z6wfCuIB1bz TsuBu9T36PRD9eToE4ccE/lWC6MupfgTKb1jo+6jhbigFYK2h+kFIbizE1+iXIBf2rhwmE 2BaURcpCVOn5lwC4TfNZoxMBQAzdaWmB4kaw+YB7nSbQBUi9t8ijUaevNzVil5uPukWiEE B9MyLIJ8+2nXeXl+6qRTUzoIksg3vgI57OH9h6kJiYIAgOHXSllYm1yKZJo7dOE8Jjahfg BXrjFn422o1+SL58nNhb0oTLuMiJi4lwExOeL6I9ls7tfPbPgyKBH2cVLS3p1sGs0sXYxE ZBzAosY1rEg2TjkuWYQ6KSIj/1QZTkH/Qhv+/54sudZvrcZ1ZHzIUs/WUjNkqVLbaZ1nVM slG7slFLvfjjUuIi8fXpw4i54f9Kf8NwYYl8vChA0LgplooU/P2HpJGLFGEZqjkNB4+vmh jmNdskuAIBIUY7yak4ZqOw6U0dd0+4JZA667rOnC25rYjHQBkcWiMP8/874g X-ME-Proxy: Feedback-ID: i47234305:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 5 Jun 2026 19:35:15 -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 v9 04/10] common/mlx5: add null MR functions Date: Sat, 6 Jun 2026 01:33:44 +0200 Message-ID: <20260605233456.3017423-5-thomas@monjalon.net> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260605233456.3017423-1-thomas@monjalon.net> References: <20260202160903.254621-1-getelson@nvidia.com> <20260605233456.3017423-1-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 a3033f5305..fb2bbae578 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