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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9504C54EBE for ; Wed, 4 Jan 2023 13:55:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239315AbjADNze (ORCPT ); Wed, 4 Jan 2023 08:55:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235134AbjADNzc (ORCPT ); Wed, 4 Jan 2023 08:55:32 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09D937657; Wed, 4 Jan 2023 05:55:31 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 99AC5615A6; Wed, 4 Jan 2023 13:55:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40343C433D2; Wed, 4 Jan 2023 13:55:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672840530; bh=kK3Zh2FWZD8B/AWPcBxeSALeCZhmyIx848iwGLiICxM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=p9Xwq0mOSmPRmW+1KuuSDQnPNa6btA/9U1cjRic7Aq3QufQk2/A5H/EGs2+u7reM4 rjsju1o132XHr5hRkKJ6q72yK/CP93zlFwhLhGRpB7WkNpsAFiu/FaYWK+sfY7Q0Em 1eP/mv/vzjAHGG8nNY68b2kKowqMUnAMFH7wmYXcMfP+hv9epL1Bd9jQbO855zhAMl PC+4toIlmHZ7ddjCB+8U8cNJeaTyy+efbZOSwVUXamZY4xSRfmLM/Sqm+2IwUC/+Uo 8OH2kNx+TeNuoduseHgVPjGbBE9Gy4L7/pnSyHftX5JrbvjePgbfldojRgxqyXPWG3 jw9FTV0zbIsGg== Date: Wed, 4 Jan 2023 15:55:25 +0200 From: Leon Romanovsky To: Jason Gunthorpe Cc: Or Har-Toov , "David S. Miller" , Eric Dumazet , Jakub Kicinski , linux-rdma@vger.kernel.org, Michael Guralnik , netdev@vger.kernel.org, Paolo Abeni , Saeed Mahameed Subject: Re: [PATCH rdma-next 4/4] RDMA/mlx5: Use query_special_contexts for mkeys Message-ID: References: <4c58f1aa2e9664b90ecdc478aef12213816cf1b7.1672819469.git.leonro@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, Jan 04, 2023 at 09:13:10AM -0400, Jason Gunthorpe wrote: > On Wed, Jan 04, 2023 at 03:09:54PM +0200, Leon Romanovsky wrote: > > On Wed, Jan 04, 2023 at 09:03:06AM -0400, Jason Gunthorpe wrote: > > > On Wed, Jan 04, 2023 at 10:11:25AM +0200, Leon Romanovsky wrote: > > > > -int mlx5_cmd_null_mkey(struct mlx5_core_dev *dev, u32 *null_mkey) > > > > -{ > > > > - u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {}; > > > > - u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {}; > > > > - int err; > > > > + err = mlx5_cmd_exec_inout(dev->mdev, query_special_contexts, in, out); > > > > + if (err) > > > > + return err; > > > > > > > > - MLX5_SET(query_special_contexts_in, in, opcode, > > > > - MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS); > > > > - err = mlx5_cmd_exec_inout(dev, query_special_contexts, in, out); > > > > - if (!err) > > > > - *null_mkey = MLX5_GET(query_special_contexts_out, out, > > > > - null_mkey); > > > > - return err; > > > > + if (MLX5_CAP_GEN(dev->mdev, dump_fill_mkey)) > > > > + dev->mkeys.dump_fill_mkey = MLX5_GET(query_special_contexts_out, > > > > + out, dump_fill_mkey); > > > > + > > > > + if (MLX5_CAP_GEN(dev->mdev, null_mkey)) > > > > + dev->mkeys.null_mkey = cpu_to_be32( > > > > + MLX5_GET(query_special_contexts_out, out, null_mkey)); > > > > + > > > > + if (MLX5_CAP_GEN(dev->mdev, terminate_scatter_list_mkey)) { > > > > + dev->mkeys.terminate_scatter_list_mkey = > > > > + cpu_to_be32(MLX5_GET(query_special_contexts_out, out, > > > > + terminate_scatter_list_mkey)); > > > > + return 0; > > > > + } > > > > + dev->mkeys.terminate_scatter_list_mkey = > > > > + MLX5_TERMINATE_SCATTER_LIST_LKEY; > > > > > > This is already stored in the core dev, why are you recalculating it > > > here? > > > > It is not recalculating but setting default value. In core dev, we will > > have value only if MLX5_CAP_GEN(dev->mdev, terminate_scatter_list_mkey) > > is true. > > No, it has the identical code: > > +static int mlx5_get_terminate_scatter_list_mkey(struct mlx5_core_dev *dev) > +{ > + if (MLX5_CAP_GEN(dev, terminate_scatter_list_mkey)) { > + dev->terminate_scatter_list_mkey = > + cpu_to_be32(MLX5_GET(query_special_contexts_out, out, > + terminate_scatter_list_mkey)); > + return 0; > + } > + dev->terminate_scatter_list_mkey = MLX5_TERMINATE_SCATTER_LIST_LKEY; Ahh, you are talking about that. terminate_scatter_list_mkey is part of an output from MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS, which is needed to get other mkeys. So instead of doing special logic for the terminate_scatter_list_mkey, we decided to use same pattern as for other mkeys, which don't belong to core. Thanks > > Jason