From patchwork Thu Nov 29 06:05:32 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Levin X-Patchwork-Id: 10703963 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F313314BD for ; Thu, 29 Nov 2018 06:06:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7025292A7 for ; Thu, 29 Nov 2018 06:06:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DAA492E764; Thu, 29 Nov 2018 06:06:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81748292A7 for ; Thu, 29 Nov 2018 06:06:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730460AbeK2RKB (ORCPT ); Thu, 29 Nov 2018 12:10:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:50342 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728020AbeK2RKB (ORCPT ); Thu, 29 Nov 2018 12:10:01 -0500 Received: from sasha-vm.mshome.net (unknown [37.142.5.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A6A142081C; Thu, 29 Nov 2018 06:05:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543471548; bh=QxIUtsqvkNER3JosGbXNItpWID295eGHUi1Z+8C/F+8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XNPZ7xyv4JJxM92BQny2EHet82KvIrJ+Ukob8h97rht/hFJLS0ANfdluq5UvL9oJ3 aNzgxamhbSvXuaHKpG9ZTGjMEfHm4Hx1BL4V9coUtUylBY07BUJAuhXZx0Swj8ktzb sorTQfVl17rnAjfNVd9Xlp2gf2LFbQk8+jZSh4MQ= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jack Morgenstein , Tariq Toukan , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org, linux-rdma@vger.kernel.org Subject: [PATCH AUTOSEL 3.18 3/6] net/mlx4_core: Zero out lkey field in SW2HW_MPT fw command Date: Thu, 29 Nov 2018 01:05:32 -0500 Message-Id: <20181129060535.160592-3-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181129060535.160592-1-sashal@kernel.org> References: <20181129060535.160592-1-sashal@kernel.org> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jack Morgenstein [ Upstream commit bd85fbc2038a1bbe84990b23ff69b6fc81a32b2c ] When re-registering a user mr, the mpt information for the existing mr when running SRIOV is obtained via the QUERY_MPT fw command. The returned information includes the mpt's lkey. This retrieved mpt information is used to move the mpt back to hardware ownership in the rereg flow (via the SW2HW_MPT fw command when running SRIOV). The fw API spec states that for SW2HW_MPT, the lkey field must be zero. Any ConnectX-3 PF driver which checks for strict spec adherence will return failure for SW2HW_MPT if the lkey field is not zero (although the fw in practice ignores this field for SW2HW_MPT). Thus, in order to conform to the fw API spec, set the lkey field to zero before invoking SW2HW_MPT when running SRIOV. Fixes: e630664c8383 ("mlx4_core: Add helper functions to support MR re-registration") Signed-off-by: Jack Morgenstein Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlx4/mr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c index b7cdef0aebd6..47c2f7c5703d 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mr.c +++ b/drivers/net/ethernet/mellanox/mlx4/mr.c @@ -372,6 +372,7 @@ int mlx4_mr_hw_write_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr, container_of((void *)mpt_entry, struct mlx4_cmd_mailbox, buf); + (*mpt_entry)->lkey = 0; err = mlx4_SW2HW_MPT(dev, mailbox, key); }