From patchwork Mon Sep 14 06:07:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Moshe Shemesh X-Patchwork-Id: 1363253 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mellanox.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BqbY24ZsRz9sTS for ; Mon, 14 Sep 2020 16:09:26 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726157AbgINGJZ (ORCPT ); Mon, 14 Sep 2020 02:09:25 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:59479 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726044AbgINGIY (ORCPT ); Mon, 14 Sep 2020 02:08:24 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from moshe@mellanox.com) with SMTP; 14 Sep 2020 09:08:17 +0300 Received: from dev-l-vrt-135.mtl.labs.mlnx (dev-l-vrt-135.mtl.labs.mlnx [10.234.135.1]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 08E68HRs020971; Mon, 14 Sep 2020 09:08:17 +0300 Received: from dev-l-vrt-135.mtl.labs.mlnx (localhost [127.0.0.1]) by dev-l-vrt-135.mtl.labs.mlnx (8.15.2/8.15.2/Debian-10) with ESMTP id 08E68HSX017403; Mon, 14 Sep 2020 09:08:17 +0300 Received: (from moshe@localhost) by dev-l-vrt-135.mtl.labs.mlnx (8.15.2/8.15.2/Submit) id 08E68H1i017402; Mon, 14 Sep 2020 09:08:17 +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 RFC v4 12/15] net/mlx5: Add devlink param enable_remote_dev_reset support Date: Mon, 14 Sep 2020 09:07:59 +0300 Message-Id: <1600063682-17313-13-git-send-email-moshe@mellanox.com> X-Mailer: git-send-email 1.8.4.3 In-Reply-To: <1600063682-17313-1-git-send-email-moshe@mellanox.com> References: <1600063682-17313-1-git-send-email-moshe@mellanox.com> Sender: netdev-owner@vger.kernel.org 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 --- v1 -> v2: - 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 | 30 +++++++++++++++++++ .../ethernet/mellanox/mlx5/core/fw_reset.h | 2 ++ 3 files changed, 53 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c index fa8f6abbea4e..175e933cf19c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c @@ -286,6 +286,24 @@ 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_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_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, @@ -301,6 +319,9 @@ 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 550f67b00473..88d59cc059bd 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_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_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) { @@ -76,6 +94,11 @@ static int mlx5_fw_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_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_fw_reset_complete_reload(struct mlx5_core_dev *dev) { struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset; @@ -170,7 +193,14 @@ static void mlx5_sync_reset_request_event(struct work_struct *work) struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, reset_request_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_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); if (mlx5_fw_set_reset_sync_ack(dev)) mlx5_core_warn(dev, "PCI Sync FW Update Reset Ack Failed.\n"); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h index d7ee951a2258..fd558dfe93fc 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_enable_remote_dev_reset_set(struct mlx5_core_dev *dev, bool enable); +bool mlx5_fw_enable_remote_dev_reset_get(struct mlx5_core_dev *dev); int mlx5_reg_mfrl_query(struct mlx5_core_dev *dev, u8 *reset_level, u8 *reset_type); int mlx5_fw_set_reset_sync(struct mlx5_core_dev *dev, u8 reset_type_sel); int mlx5_fw_set_live_patch(struct mlx5_core_dev *dev);