From nobody Sun Feb 8 01:49:33 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B431C3A59D for ; Sat, 22 Oct 2022 08:36:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233921AbiJVIgB (ORCPT ); Sat, 22 Oct 2022 04:36:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234227AbiJVIaE (ORCPT ); Sat, 22 Oct 2022 04:30:04 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 881832E32D9; Sat, 22 Oct 2022 01:02:07 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 050E4B82E11; Sat, 22 Oct 2022 07:51:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D038CC433C1; Sat, 22 Oct 2022 07:51:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666425069; bh=GGfMeq0Y2E3Tt4hU/JXQhleUHqj5ipTavMY9Ad79xMM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mwokMRQ52ijagpbWduhcQ0KHynY0dxHloom3b1Ysm4s+FQYhh/jCKm/tNp6EMsIjX dToLN1Hrcmt/vKqQs2wJm4v+ojlJQsi0hssjT+vhQLviTR8Phi+3AZkIwt4FXns+i5 TWdeBszFwiogub75Ks+5pSBm6MXi0ALyM6DvmA8M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Aharon Landau , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.19 379/717] RDMA/mlx5: Dont compare mkey tags in DEVX indirect mkey Date: Sat, 22 Oct 2022 09:24:18 +0200 Message-Id: <20221022072513.991553805@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221022072415.034382448@linuxfoundation.org> References: <20221022072415.034382448@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Aharon Landau [ Upstream commit 13ad1125b941a5f257d9d3ae70485773abd34792 ] According to the ib spec: If the CI supports the Base Memory Management Extensions defined in this specification, the L_Key format must consist of: 24 bit index in the most significant bits of the R_Key, and 8 bit key in the least significant bits of the R_Key Through a successful Allocate L_Key verb invocation, the CI must let the consumer own the key portion of the returned R_Key Therefore, when creating a mkey using DEVX, the consumer is allowed to change the key part. The kernel should compare only the index part of a R_Key to determine equality with another R_Key. Adding capability in order not to break backward compatibility. Fixes: 534fd7aac56a ("IB/mlx5: Manage indirection mkey upon DEVX flow for O= DP") Link: https://lore.kernel.org/r/3d669aacea85a3a15c3b3b953b3eaba3f80ef9be.16= 59255945.git.leonro@nvidia.com Signed-off-by: Aharon Landau Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx5/main.c | 3 +++ drivers/infiniband/hw/mlx5/odp.c | 3 ++- include/uapi/rdma/mlx5-abi.h | 1 + 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5= /main.c index bb13164124fd..aa4a2a9cb0d5 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -1826,6 +1826,9 @@ static int set_ucontext_resp(struct ib_ucontext *uctx, if (MLX5_CAP_GEN(dev->mdev, drain_sigerr)) resp->comp_mask |=3D MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_SQD2RTS; =20 + resp->comp_mask |=3D + MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_MKEY_UPDATE_TAG; + return 0; } =20 diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/= odp.c index 84da5674e1ab..9151852f04a1 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -795,7 +795,8 @@ static bool mkey_is_eq(struct mlx5_ib_mkey *mmkey, u32 = key) { if (!mmkey) return false; - if (mmkey->type =3D=3D MLX5_MKEY_MW) + if (mmkey->type =3D=3D MLX5_MKEY_MW || + mmkey->type =3D=3D MLX5_MKEY_INDIRECT_DEVX) return mlx5_base_mkey(mmkey->key) =3D=3D mlx5_base_mkey(key); return mmkey->key =3D=3D key; } diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h index 86be4a92b67b..a96b7d2770e1 100644 --- a/include/uapi/rdma/mlx5-abi.h +++ b/include/uapi/rdma/mlx5-abi.h @@ -104,6 +104,7 @@ enum mlx5_ib_alloc_ucontext_resp_mask { MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_ECE =3D 1UL << 2, MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_SQD2RTS =3D 1UL << 3, MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_REAL_TIME_TS =3D 1UL << 4, + MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_MKEY_UPDATE_TAG =3D 1UL << 5, }; =20 enum mlx5_user_cmds_supp_uhw { --=20 2.35.1