From patchwork Wed Oct 7 06:00:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Moshe Shemesh X-Patchwork-Id: 268517 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 74BCCC4363C for ; Wed, 7 Oct 2020 06:14:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B3E120B1F for ; Wed, 7 Oct 2020 06:14:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727437AbgJGGOU (ORCPT ); Wed, 7 Oct 2020 02:14:20 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:37583 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727210AbgJGGOQ (ORCPT ); Wed, 7 Oct 2020 02:14:16 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from moshe@mellanox.com) with SMTP; 7 Oct 2020 09:14:08 +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 09761IR8018885; 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 09761IGx021792; 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 09761Ibw021791; Wed, 7 Oct 2020 09:01:18 +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 14/16] net/mlx5: Add support for fw live patch event Date: Wed, 7 Oct 2020 09:00:55 +0300 Message-Id: <1602050457-21700-15-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 Firmware live patch event notifies the driver that the firmware was just updated using live patch. In such case the driver should not reload or re-initiate entities, part to updating the firmware version and re-initiate the firmware tracer which can be updated by live patch with new strings database to help debugging an issue. Signed-off-by: Moshe Shemesh Reviewed-by: Saeed Mahameed --- .../mellanox/mlx5/core/diag/fw_tracer.c | 52 +++++++++++++++++++ .../mellanox/mlx5/core/diag/fw_tracer.h | 1 + .../ethernet/mellanox/mlx5/core/fw_reset.c | 24 +++++++++ include/linux/mlx5/device.h | 1 + 4 files changed, 78 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c index ede4640b8428..2eb022ad7fd0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c @@ -1066,6 +1066,58 @@ void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer) kvfree(tracer); } +static int mlx5_fw_tracer_recreate_strings_db(struct mlx5_fw_tracer *tracer) +{ + struct mlx5_core_dev *dev; + int err; + + cancel_work_sync(&tracer->read_fw_strings_work); + mlx5_fw_tracer_clean_ready_list(tracer); + mlx5_fw_tracer_clean_print_hash(tracer); + mlx5_fw_tracer_clean_saved_traces_array(tracer); + mlx5_fw_tracer_free_strings_db(tracer); + + dev = tracer->dev; + err = mlx5_query_mtrc_caps(tracer); + if (err) { + mlx5_core_dbg(dev, "FWTracer: Failed to query capabilities %d\n", err); + return err; + } + + err = mlx5_fw_tracer_allocate_strings_db(tracer); + if (err) { + mlx5_core_warn(dev, "FWTracer: Allocate strings DB failed %d\n", err); + return err; + } + mlx5_fw_tracer_init_saved_traces_array(tracer); + + return 0; +} + +int mlx5_fw_tracer_reload(struct mlx5_fw_tracer *tracer) +{ + struct mlx5_core_dev *dev; + int err; + + if (IS_ERR_OR_NULL(tracer)) + return -EINVAL; + + dev = tracer->dev; + mlx5_fw_tracer_cleanup(tracer); + err = mlx5_fw_tracer_recreate_strings_db(tracer); + if (err) { + mlx5_core_warn(dev, "Failed to recreate FW tracer strings DB\n"); + return err; + } + err = mlx5_fw_tracer_init(tracer); + if (err) { + mlx5_core_warn(dev, "Failed to re-initialize FW tracer\n"); + return err; + } + + return 0; +} + static int fw_tracer_event(struct notifier_block *nb, unsigned long action, void *data) { struct mlx5_fw_tracer *tracer = mlx5_nb_cof(nb, struct mlx5_fw_tracer, nb); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.h b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.h index 40601fba80ba..97252a85d65e 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.h @@ -191,5 +191,6 @@ void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer); int mlx5_fw_tracer_trigger_core_dump_general(struct mlx5_core_dev *dev); int mlx5_fw_tracer_get_saved_traces_objects(struct mlx5_fw_tracer *tracer, struct devlink_fmsg *fmsg); +int mlx5_fw_tracer_reload(struct mlx5_fw_tracer *tracer); #endif diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c index b2aaff8d4fcd..f9042e147c7f 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c @@ -2,6 +2,7 @@ /* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. */ #include "fw_reset.h" +#include "diag/fw_tracer.h" enum { MLX5_FW_RESET_FLAGS_RESET_REQUESTED, @@ -13,6 +14,7 @@ struct mlx5_fw_reset { struct mlx5_core_dev *dev; struct mlx5_nb nb; struct workqueue_struct *wq; + struct work_struct fw_live_patch_work; struct work_struct reset_request_work; struct work_struct reset_reload_work; struct work_struct reset_now_work; @@ -192,6 +194,24 @@ static void mlx5_sync_reset_set_reset_requested(struct mlx5_core_dev *dev) mlx5_start_sync_reset_poll(dev); } +static void mlx5_fw_live_patch_event(struct work_struct *work) +{ + struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, + fw_live_patch_work); + struct mlx5_core_dev *dev = fw_reset->dev; + struct mlx5_fw_tracer *tracer; + + mlx5_core_info(dev, "Live patch updated firmware version: %d.%d.%d\n", fw_rev_maj(dev), + fw_rev_min(dev), fw_rev_sub(dev)); + + tracer = dev->tracer; + if (IS_ERR_OR_NULL(tracer)) + return; + + if (mlx5_fw_tracer_reload(tracer)) + mlx5_core_err(dev, "Failed to reload FW tracer\n"); +} + static void mlx5_sync_reset_request_event(struct work_struct *work) { struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset, @@ -364,6 +384,9 @@ static int fw_reset_event_notifier(struct notifier_block *nb, unsigned long acti struct mlx5_eqe *eqe = data; switch (eqe->sub_type) { + case MLX5_GENERAL_SUBTYPE_FW_LIVE_PATCH_EVENT: + queue_work(fw_reset->wq, &fw_reset->fw_live_patch_work); + break; case MLX5_GENERAL_SUBTYPE_PCI_SYNC_FOR_FW_UPDATE_EVENT: mlx5_sync_reset_events_handle(fw_reset, eqe); break; @@ -421,6 +444,7 @@ int mlx5_fw_reset_init(struct mlx5_core_dev *dev) fw_reset->dev = dev; dev->priv.fw_reset = fw_reset; + INIT_WORK(&fw_reset->fw_live_patch_work, mlx5_fw_live_patch_event); INIT_WORK(&fw_reset->reset_request_work, mlx5_sync_reset_request_event); INIT_WORK(&fw_reset->reset_reload_work, mlx5_sync_reset_reload_work); INIT_WORK(&fw_reset->reset_now_work, mlx5_sync_reset_now_event); diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h index 81ca5989009b..cf824366a7d1 100644 --- a/include/linux/mlx5/device.h +++ b/include/linux/mlx5/device.h @@ -366,6 +366,7 @@ enum { enum { MLX5_GENERAL_SUBTYPE_DELAY_DROP_TIMEOUT = 0x1, MLX5_GENERAL_SUBTYPE_PCI_POWER_CHANGE_EVENT = 0x5, + MLX5_GENERAL_SUBTYPE_FW_LIVE_PATCH_EVENT = 0x7, MLX5_GENERAL_SUBTYPE_PCI_SYNC_FOR_FW_UPDATE_EVENT = 0x8, };