From patchwork Wed Oct 7 06:00:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Moshe Shemesh X-Patchwork-Id: 268524 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39B7EC4363C for ; Wed, 7 Oct 2020 06:01:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC82320575 for ; Wed, 7 Oct 2020 06:01:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727472AbgJGGBf (ORCPT ); Wed, 7 Oct 2020 02:01:35 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:34477 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727351AbgJGGB2 (ORCPT ); Wed, 7 Oct 2020 02:01:28 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from moshe@mellanox.com) with SMTP; 7 Oct 2020 09:01:18 +0300 Received: from dev-l-vrt-136.mtl.labs.mlnx (dev-l-vrt-136.mtl.labs.mlnx [10.234.136.1]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 09761IGP018873; Wed, 7 Oct 2020 09:01:18 +0300 Received: from dev-l-vrt-136.mtl.labs.mlnx (localhost [127.0.0.1]) by dev-l-vrt-136.mtl.labs.mlnx (8.14.7/8.14.7) with ESMTP id 09761Iih021790; Wed, 7 Oct 2020 09:01:18 +0300 Received: (from moshe@localhost) by dev-l-vrt-136.mtl.labs.mlnx (8.14.7/8.14.7/Submit) id 09761H21021789; Wed, 7 Oct 2020 09:01:17 +0300 From: Moshe Shemesh To: "David S. Miller" , Jakub Kicinski , Jiri Pirko Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Moshe Shemesh Subject: [PATCH net-next v2 13/16] net/mlx5: Add devlink param enable_remote_dev_reset support Date: Wed, 7 Oct 2020 09:00:54 +0300 Message-Id: <1602050457-21700-14-git-send-email-moshe@mellanox.com> X-Mailer: git-send-email 1.8.4.3 In-Reply-To: <1602050457-21700-1-git-send-email-moshe@mellanox.com> References: <1602050457-21700-1-git-send-email-moshe@mellanox.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The enable_remote_dev_reset devlink param flags that the host admin allows resets by other hosts. In case it is cleared mlx5 host PF driver will send NACK on pci sync for firmware update reset request and the command will fail. By default enable_remote_dev_reset parameter is true, so pci sync for firmware update reset is enabled. Signed-off-by: Moshe Shemesh Reviewed-by: Saeed Mahameed --- RFCv1 -> RFCv2: - Have MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST instead of MLX5_HEALTH_RESET_FLAGS_NACK_RESET_REQUEST --- .../net/ethernet/mellanox/mlx5/core/devlink.c | 21 ++++++++++++++ .../ethernet/mellanox/mlx5/core/fw_reset.c | 29 +++++++++++++++++++ .../ethernet/mellanox/mlx5/core/fw_reset.h | 2 ++ 3 files changed, 52 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c index aeb57e641e15..cbfb84d1cac2 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c @@ -278,6 +278,24 @@ static int mlx5_devlink_large_group_num_validate(struct devlink *devlink, u32 id } #endif +static int mlx5_devlink_enable_remote_dev_reset_set(struct devlink *devlink, u32 id, + struct devlink_param_gset_ctx *ctx) +{ + struct mlx5_core_dev *dev = devlink_priv(devlink); + + mlx5_fw_reset_enable_remote_dev_reset_set(dev, ctx->val.vbool); + return 0; +} + +static int mlx5_devlink_enable_remote_dev_reset_get(struct devlink *devlink, u32 id, + struct devlink_param_gset_ctx *ctx) +{ + struct mlx5_core_dev *dev = devlink_priv(devlink); + + ctx->val.vbool = mlx5_fw_reset_enable_remote_dev_reset_get(dev); + return 0; +} + static const struct devlink_param mlx5_devlink_params[] = { DEVLINK_PARAM_DRIVER(MLX5_DEVLINK_PARAM_ID_FLOW_STEERING_MODE, "flow_steering_mode", DEVLINK_PARAM_TYPE_STRING, @@ -293,6 +311,9 @@ static const struct devlink_param mlx5_devlink_params[] = { NULL, NULL, mlx5_devlink_large_group_num_validate), #endif + DEVLINK_PARAM_GENERIC(ENABLE_REMOTE_DEV_RESET, BIT(DEVLINK_PARAM_CMODE_RUNTIME), + mlx5_devlink_enable_remote_dev_reset_get, + mlx5_devlink_enable_remote_dev_reset_set, NULL), }; static void mlx5_devlink_set_params_init_values(struct devlink *devlink) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c index f5ffb6fc55c3..b2aaff8d4fcd 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c @@ -5,6 +5,7 @@ enum { MLX5_FW_RESET_FLAGS_RESET_REQUESTED, + MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, MLX5_FW_RESET_FLAGS_PENDING_COMP }; @@ -22,6 +23,23 @@ struct mlx5_fw_reset { int ret; }; +void mlx5_fw_reset_enable_remote_dev_reset_set(struct mlx5_core_dev *dev, bool enable) +{ + struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; + + if (enable) + clear_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags); + else + set_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags); +} + +bool mlx5_fw_reset_enable_remote_dev_reset_get(struct mlx5_core_dev *dev) +{ + struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; + + return !test_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags); +} + static int mlx5_reg_mfrl_set(struct mlx5_core_dev *dev, u8 reset_level, u8 reset_type_sel, u8 sync_resp, bool sync_start) { @@ -160,6 +178,11 @@ static int mlx5_fw_reset_set_reset_sync_ack(struct mlx5_core_dev *dev) return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL3, 0, 1, false); } +static int mlx5_fw_reset_set_reset_sync_nack(struct mlx5_core_dev *dev) +{ + return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL3, 0, 2, false); +} + static void mlx5_sync_reset_set_reset_requested(struct mlx5_core_dev *dev) { struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; @@ -176,6 +199,12 @@ static void mlx5_sync_reset_request_event(struct work_struct *work) struct mlx5_core_dev *dev = fw_reset->dev; int err; + if (test_bit(MLX5_FW_RESET_FLAGS_NACK_RESET_REQUEST, &fw_reset->reset_flags)) { + err = mlx5_fw_reset_set_reset_sync_nack(dev); + mlx5_core_warn(dev, "PCI Sync FW Update Reset Nack %s", + err ? "Failed" : "Sent"); + return; + } mlx5_sync_reset_set_reset_requested(dev); err = mlx5_fw_reset_set_reset_sync_ack(dev); if (err) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h index e7937447ce1d..7761ee5fc7d0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h @@ -6,6 +6,8 @@ #include "mlx5_core.h" +void mlx5_fw_reset_enable_remote_dev_reset_set(struct mlx5_core_dev *dev, bool enable); +bool mlx5_fw_reset_enable_remote_dev_reset_get(struct mlx5_core_dev *dev); int mlx5_fw_reset_query(struct mlx5_core_dev *dev, u8 *reset_level, u8 *reset_type); int mlx5_fw_reset_set_reset_sync(struct mlx5_core_dev *dev, u8 reset_type_sel); int mlx5_fw_reset_set_live_patch(struct mlx5_core_dev *dev);