From patchwork Wed Jun 14 09:41:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Greenman, Gregory" X-Patchwork-Id: 693634 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 BB9EAEB64DA for ; Wed, 14 Jun 2023 09:45:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244179AbjFNJpf (ORCPT ); Wed, 14 Jun 2023 05:45:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244320AbjFNJou (ORCPT ); Wed, 14 Jun 2023 05:44:50 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B164271F for ; Wed, 14 Jun 2023 02:43:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686735835; x=1718271835; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/LGUbBgzNX1PIxlKIWtkrruGew6ptfFdD1yaXmcePHQ=; b=kPZXZAyKoyzMgNgxVv2gdyVkx10HVwhmvMTA82gzIpZVGCiA/ZIXnm0t EwH/FJ5K5SPxJvF9Nb97CDVEdww0L0xrT4FcSDZzpX0WwNnuNxlKZ2CLO yUSY+pNt++4A6MzySxC7xDCPlQQ2c8WcYpgEvP3htDG2h7QpbsgESDGbQ xrZmaJ4k58dp7Pr+JTeCVxVSjyhyWzHEQqw8my3iVbYDF6X7zqJRXlpdN 2PG5oGqYQxiuFMBt7zNByeiA7adoG8X9dyv8IBlPIYQB40l5L1oOlNlio LhrvdJywzG/BNzLjfl/2sYtgfHDQ64f5szpQqjehtxjSovQFr7DbBl+Qf g==; X-IronPort-AV: E=McAfee;i="6600,9927,10740"; a="361049881" X-IronPort-AV: E=Sophos;i="6.00,242,1681196400"; d="scan'208";a="361049881" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 02:42:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10740"; a="711989891" X-IronPort-AV: E=Sophos;i="6.00,242,1681196400"; d="scan'208";a="711989891" Received: from basharil-mobl.ger.corp.intel.com (HELO ggreenma-mobl2.lan) ([10.214.203.45]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 02:42:24 -0700 From: gregory.greenman@intel.com To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Johannes Berg , Gregory Greenman Subject: [PATCH 14/20] wifi: iwlwifi: add some FW misbehaviour check infrastructure Date: Wed, 14 Jun 2023 12:41:31 +0300 Message-Id: <20230614123446.2e12ac670cea.Ia0198036b7a626876d836bd41a4b2d2b1e65c5ca@changeid> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230614094137.379897-1-gregory.greenman@intel.com> References: <20230614094137.379897-1-gregory.greenman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Johannes Berg When the firmware misbehaves (according to the driver), we often either ignore that, or WARN_ON, which is very noisy but doesn't really help. Add a little helper macro IWL_FW_CHECK() that can be used in place of WARN_ON() in conditions, and make it take a message that's printed in this case. We can also add more behaviour to this in the future. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman --- drivers/net/wireless/intel/iwlwifi/fw/dbg.h | 16 +++++++++++++++- drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 4 +++- drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 10 ++++++---- drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 15 ++++++++++++--- 4 files changed, 36 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h index be7806407de8..dcba0eefe70d 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ /* - * Copyright (C) 2005-2014, 2018-2019, 2021-2022 Intel Corporation + * Copyright (C) 2005-2014, 2018-2019, 2021-2023 Intel Corporation * Copyright (C) 2013-2015 Intel Mobile Communications GmbH * Copyright (C) 2015-2017 Intel Deutschland GmbH */ @@ -327,4 +327,18 @@ void iwl_fwrt_dump_error_logs(struct iwl_fw_runtime *fwrt); void iwl_send_dbg_dump_complete_cmd(struct iwl_fw_runtime *fwrt, u32 timepoint, u32 timepoint_data); + +#define IWL_FW_CHECK_FAILED(_obj, _fmt, ...) \ + IWL_ERR_LIMIT(_obj, _fmt, __VA_ARGS__) + +#define IWL_FW_CHECK(_obj, _cond, _fmt, ...) \ + ({ \ + bool __cond = (_cond); \ + \ + if (unlikely(__cond)) \ + IWL_FW_CHECK_FAILED(_obj, _fmt, __VA_ARGS__); \ + \ + unlikely(__cond); \ + }) + #endif /* __iwl_fw_dbg_h__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index cc04d7cad715..5336a4afde4d 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -1601,7 +1601,9 @@ static void iwl_mvm_rx_common(struct iwl_mvm *mvm, if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd)) continue; - if (unlikely(pkt_len < rx_h->min_size)) + if (IWL_FW_CHECK(mvm, pkt_len < rx_h->min_size, + "unexpected notification 0x%04x size %d, need %d\n", + rx_h->cmd_id, pkt_len, rx_h->min_size)) return; if (rx_h->context == RX_HANDLER_SYNC) { diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c index 9d8d9def9391..5c06839b87c2 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c @@ -985,10 +985,12 @@ static bool iwl_mvm_reorder(struct iwl_mvm *mvm, sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1); rcu_read_unlock(); - if (WARN(tid != baid_data->tid || - !(sta_mask & baid_data->sta_mask), - "baid 0x%x is mapped to sta_mask:0x%x tid:%d, but was received for sta_mask:0x%x tid:%d\n", - baid, baid_data->sta_mask, baid_data->tid, sta_mask, tid)) + if (IWL_FW_CHECK(mvm, + tid != baid_data->tid || + !(sta_mask & baid_data->sta_mask), + "baid 0x%x is mapped to sta_mask:0x%x tid:%d, but was received for sta_mask:0x%x tid:%d\n", + baid, baid_data->sta_mask, baid_data->tid, + sta_mask, tid)) return false; nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK; diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c index 06fb4b72ee9b..a04ce7d555d1 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c @@ -2123,7 +2123,8 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) u16 tfd_cnt; int i; - if (unlikely(sizeof(*ba_res) > pkt_len)) + if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len, + "short BA notification (%d)\n", pkt_len)) return; sta_id = ba_res->sta_id; @@ -2135,7 +2136,13 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) (void *)(uintptr_t)ba_res->reduced_txp; tfd_cnt = le16_to_cpu(ba_res->tfd_cnt); - if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len) + if (!tfd_cnt) + return; + + if (IWL_FW_CHECK(mvm, + struct_size(ba_res, tfd, tfd_cnt) > pkt_len, + "short BA notification (tfds:%d, size:%d)\n", + tfd_cnt, pkt_len)) return; rcu_read_lock(); @@ -2193,7 +2200,9 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) rcu_read_lock(); mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); - if (WARN_ON_ONCE(!mvmsta)) { + if (IWL_FW_CHECK(mvm, !mvmsta, + "invalid STA ID %d in BA notif\n", + sta_id)) { rcu_read_unlock(); return; }