From patchwork Sun Oct 30 17:17:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Greenman, Gregory" X-Patchwork-Id: 620447 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 A9BA9FA3742 for ; Sun, 30 Oct 2022 17:18:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229718AbiJ3RS2 (ORCPT ); Sun, 30 Oct 2022 13:18:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229785AbiJ3RS1 (ORCPT ); Sun, 30 Oct 2022 13:18:27 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 499422E7 for ; Sun, 30 Oct 2022 10:18:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667150305; x=1698686305; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=vPTZ4a0XcgMebQ+iQqDZfr3C4xGhrl5i+VBCMvVGr7k=; b=T/CB0Mo9GbjOqbJmYGKsZzm7dij8XlezAe1LhhZUfIQTObxtRItnM5Nb g5E/OBDl7NrEPvgxbE/6wkYx9ofiYdSsaAOukQPKeZgt54tED6iBaBiqQ KU+Do8Cw7SbLOgsALiYuLKpFCD83VnpIWTuO586wv7lbWs/5gAfWf6TKp x2zUK8Pm59G95I9FXXM0GidM/cDuBpp/ECfXuQOZfvw6maR5xhodXw2kQ J9kKgPjc+mtSwOw0e5yFOdWc3RjQYUIsKrDD/4jI3KdQeJ/CP9HGnv+f2 PCVMXrI1ZtvBlGNpebfReADTjGHzqlIuCYqz32jrGU7GuzgL925WQNAqV g==; X-IronPort-AV: E=McAfee;i="6500,9779,10516"; a="372973225" X-IronPort-AV: E=Sophos;i="5.95,226,1661842800"; d="scan'208";a="372973225" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2022 10:18:24 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10516"; a="633290228" X-IronPort-AV: E=Sophos;i="5.95,226,1661842800"; d="scan'208";a="633290228" Received: from gustyuzh-mobl.ger.corp.intel.com (HELO ggreenma-mobl2.intel.com) ([10.249.83.75]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2022 10:18:23 -0700 From: gregory.greenman@intel.com To: kvalo@kernel.org, johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Avraham Stern , Gregory Greenman Subject: [PATCH 2/6] wifi: iwlwifi: mei: make sure ownership confirmed message is sent Date: Sun, 30 Oct 2022 19:17:41 +0200 Message-Id: <20221030191011.b2a4c009e3e6.I7f931b7ee8b168e8ac88b11f23bff98b7ed3cb19@changeid> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20221030171745.132081-1-gregory.greenman@intel.com> References: <20221030171745.132081-1-gregory.greenman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Avraham Stern It is possible that CSME will try to take ownership while the driver is stopping. In this case, if the CSME takes ownership message arrives after the driver started unregistering, the iwl_mei_cache->ops is already invalid, so the host will not answer with the ownership confirmed message. Similarly, if the take ownership message arrived after the mac was stopped or when iwl_mvm_up() failed, setting rfkill will not trigger sending the confirm message. As a result, CSME will not take ownership, which will result in a disconnection. Fix it by sending the ownership confirmed message immediately in such cases. Fixes: 2da4366f9e2c ("iwlwifi: mei: add the driver to allow cooperation with CSME") Signed-off-by: Avraham Stern Signed-off-by: Gregory Greenman --- .../net/wireless/intel/iwlwifi/mei/iwl-mei.h | 7 +++-- drivers/net/wireless/intel/iwlwifi/mei/main.c | 30 ++++++++++++------- drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 2 ++ drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 4 +-- drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 2 +- 5 files changed, 29 insertions(+), 16 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h b/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h index bea61c8fb526..2e57438a70f0 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h +++ b/drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h @@ -448,9 +448,10 @@ void iwl_mei_host_associated(const struct iwl_mei_conn_info *conn_info, void iwl_mei_host_disassociated(void); /** - * iwl_mei_device_down() - must be called when the device is down + * iwl_mei_device_state() - must be called when the device changes up/down state + * @up: true if the device is up, false otherwise. */ -void iwl_mei_device_down(void); +void iwl_mei_device_state(bool up); #else @@ -499,7 +500,7 @@ static inline void iwl_mei_host_associated(const struct iwl_mei_conn_info *conn_ static inline void iwl_mei_host_disassociated(void) {} -static inline void iwl_mei_device_down(void) +static inline void iwl_mei_device_state(bool up) {} #endif /* CONFIG_IWLMEI */ diff --git a/drivers/net/wireless/intel/iwlwifi/mei/main.c b/drivers/net/wireless/intel/iwlwifi/mei/main.c index 357f14626cf4..90646c54a3c5 100644 --- a/drivers/net/wireless/intel/iwlwifi/mei/main.c +++ b/drivers/net/wireless/intel/iwlwifi/mei/main.c @@ -147,6 +147,8 @@ struct iwl_mei_filters { * to send CSME_OWNERSHIP_CONFIRMED when the driver completes its down * flow. * @link_prot_state: true when we are in link protection PASSIVE + * @device_down: true if the device is down. Used to remember to send + * CSME_OWNERSHIP_CONFIRMED when the driver is already down. * @csa_throttle_end_wk: used when &csa_throttled is true * @data_q_lock: protects the access to the data queues which are * accessed without the mutex. @@ -167,6 +169,7 @@ struct iwl_mei { bool csa_throttled; bool csme_taking_ownership; bool link_prot_state; + bool device_down; struct delayed_work csa_throttle_end_wk; spinlock_t data_q_lock; @@ -798,14 +801,18 @@ static void iwl_mei_handle_csme_taking_ownership(struct mei_cl_device *cldev, mei->got_ownership = false; - /* - * Remember to send CSME_OWNERSHIP_CONFIRMED when the wifi driver - * is finished taking the device down. - */ - mei->csme_taking_ownership = true; + if (iwl_mei_cache.ops && !mei->device_down) { + /* + * Remember to send CSME_OWNERSHIP_CONFIRMED when the wifi + * driver is finished taking the device down. + */ + mei->csme_taking_ownership = true; - if (iwl_mei_cache.ops) - iwl_mei_cache.ops->rfkill(iwl_mei_cache.priv, true); + iwl_mei_cache.ops->rfkill(iwl_mei_cache.priv, true, true); + } else { + iwl_mei_send_sap_msg(cldev, + SAP_MSG_NOTIF_CSME_OWNERSHIP_CONFIRMED); + } } static void iwl_mei_handle_nvm(struct mei_cl_device *cldev, @@ -1616,7 +1623,7 @@ void iwl_mei_set_netdev(struct net_device *netdev) } EXPORT_SYMBOL_GPL(iwl_mei_set_netdev); -void iwl_mei_device_down(void) +void iwl_mei_device_state(bool up) { struct iwl_mei *mei; @@ -1630,7 +1637,9 @@ void iwl_mei_device_down(void) if (!mei) goto out; - if (!mei->csme_taking_ownership) + mei->device_down = !up; + + if (up || !mei->csme_taking_ownership) goto out; iwl_mei_send_sap_msg(mei->cldev, @@ -1639,7 +1648,7 @@ void iwl_mei_device_down(void) out: mutex_unlock(&iwl_mei_mutex); } -EXPORT_SYMBOL_GPL(iwl_mei_device_down); +EXPORT_SYMBOL_GPL(iwl_mei_device_state); int iwl_mei_register(void *priv, const struct iwl_mei_ops *ops) { @@ -1821,6 +1830,7 @@ static int iwl_mei_probe(struct mei_cl_device *cldev, mei_cldev_set_drvdata(cldev, mei); mei->cldev = cldev; + mei->device_down = true; do { ret = iwl_mei_alloc_shared_mem(cldev); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c index f041e77af059..5de34edc51fe 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c @@ -1665,6 +1665,8 @@ int iwl_mvm_up(struct iwl_mvm *mvm) iwl_rfi_send_config_cmd(mvm, NULL); } + iwl_mvm_mei_device_state(mvm, true); + IWL_DEBUG_INFO(mvm, "RT uCode started.\n"); return 0; error: diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h index 97cba526e465..1ccb3cad7cdc 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h @@ -2201,10 +2201,10 @@ static inline void iwl_mvm_mei_host_disassociated(struct iwl_mvm *mvm) iwl_mei_host_disassociated(); } -static inline void iwl_mvm_mei_device_down(struct iwl_mvm *mvm) +static inline void iwl_mvm_mei_device_state(struct iwl_mvm *mvm, bool up) { if (mvm->mei_registered) - iwl_mei_device_down(); + iwl_mei_device_state(up); } static inline void iwl_mvm_mei_set_sw_rfkill_state(struct iwl_mvm *mvm) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index d2d42cd48af2..5b8e9a06f6d4 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -1375,7 +1375,7 @@ void iwl_mvm_stop_device(struct iwl_mvm *mvm) iwl_trans_stop_device(mvm->trans); iwl_free_fw_paging(&mvm->fwrt); iwl_fw_dump_conf_clear(&mvm->fwrt); - iwl_mvm_mei_device_down(mvm); + iwl_mvm_mei_device_state(mvm, false); } static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)