From patchwork Mon Sep 13 20:53:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 510271 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 46260C433F5 for ; Mon, 13 Sep 2021 20:53:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 284DE610A2 for ; Mon, 13 Sep 2021 20:53:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243760AbhIMUzA (ORCPT ); Mon, 13 Sep 2021 16:55:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244422AbhIMUyy (ORCPT ); Mon, 13 Sep 2021 16:54:54 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DB8DC061762 for ; Mon, 13 Sep 2021 13:53:16 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id k24so10583066pgh.8 for ; Mon, 13 Sep 2021 13:53:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=f90knbbhtSScT8ar0jqF08SQUZmsRray7TeEETy/L9c=; b=TLgwdSKTYs4IaAyBBMpkY+P28NYma3r1phTKbQrF7ns68EYCnG/diFKdtFOwdJ2R8D xT9nmLrmtnmDk54bafY9N3Zxttn4/3BZoudzEIvLFqtXIRDtgTzSPdOu0VCzfb3Skjyo 8K1CUuIokwBsacA+2mLbS6MBqCyLa4zgJLpQk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=f90knbbhtSScT8ar0jqF08SQUZmsRray7TeEETy/L9c=; b=ucTvTTc897Z2EuG5WW0KasDjMCmxD0KtJjLEiqDTopfl20e+6s8eLecV8c3Kn0euZO 4NAz27UruxJnUnI7snVvhM2++LWbyFLTqSKC+caTwz8IAnK2Av5belhggX3E45YjdVz0 ymDhrzhacJunYM0CwYm2TZ5xUqPmq4XaNgJJhKSZYqxmfrIzsdhI2QUnu3ShrDHhnvV1 iyJ6CbGhWLsIkTgn6IMdU5VpD2qxEmu0mkdBp/gY6EJ9J4bscp1iunhnR2xa5UtvX4y5 hf4foVn/0/Mad86VbHtBFJFdJMifIamkJ1kT3mnmP+fnKdFu96QwY8wlPNNQJR8u7nRo V0Zg== X-Gm-Message-State: AOAM533D8W9kzflHRgOvN15ZtPzQLF8B9okv7CgSpbWOCavHMjG4FvTD iyJmFtV25XZSBtuSC+db8TB74Q== X-Google-Smtp-Source: ABdhPJxAl/mPXt91YwawfAofyXkkfN2pdLltwPNS+6qxwL3ENdYmXvUidco0XR00ILeLkAlx8X+QJg== X-Received: by 2002:a63:f817:: with SMTP id n23mr12417256pgh.250.1631566395792; Mon, 13 Sep 2021 13:53:15 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:201:cd18:482a:6391:201b]) by smtp.gmail.com with ESMTPSA id n11sm7702188pjh.23.2021.09.13.13.53.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Sep 2021 13:53:15 -0700 (PDT) From: Stephen Boyd To: Kalle Valo Cc: linux-kernel@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, Youghandhar Chintala , Abhishek Kumar , Steev Klimaszewski , Matthias Kaehlcke Subject: [PATCH v2] ath10k: Don't always treat modem stop events as crashes Date: Mon, 13 Sep 2021 13:53:13 -0700 Message-Id: <20210913205313.3420049-1-swboyd@chromium.org> X-Mailer: git-send-email 2.33.0.309.g3052b89438-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org When rebooting on sc7180 Trogdor devices I see the following crash from the wifi driver. ath10k_snoc 18800000.wifi: firmware crashed! (guid 83493570-29a2-4e98-a83e-70048c47669c) This is because a modem stop event looks just like a firmware crash to the driver, the qmi connection is closed in both cases. Use the qcom ssr notifier block to stop treating the qmi connection close event as a firmware crash signal when the modem hasn't actually crashed. See ath10k_qmi_event_server_exit() for more details. This silences the crash message seen during every reboot. Fixes: 3f14b73c3843 ("ath10k: Enable MSA region dump support for WCN3990") Cc: Youghandhar Chintala Cc: Abhishek Kumar Tested-By: Steev Klimaszewski Reviewed-by: Matthias Kaehlcke Reviewed-by: Abhishek Kumar Signed-off-by: Stephen Boyd --- Changes since v1 (https://lore.kernel.org/r/20210905210400.1157870-1-swboyd@chromium.org): * Push error message into function instead of checking at callsite drivers/net/wireless/ath/ath10k/snoc.c | 77 ++++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/snoc.h | 4 ++ 2 files changed, 81 insertions(+) base-commit: 7d2a07b769330c34b4deabeed939325c77a7ec2f diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c index ea00fbb15601..965136261aef 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.c +++ b/drivers/net/wireless/ath/ath10k/snoc.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -1477,6 +1478,74 @@ void ath10k_snoc_fw_crashed_dump(struct ath10k *ar) mutex_unlock(&ar->dump_mutex); } +static int ath10k_snoc_modem_notify(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct ath10k_snoc *ar_snoc = container_of(nb, struct ath10k_snoc, nb); + struct ath10k *ar = ar_snoc->ar; + struct qcom_ssr_notify_data *notify_data = data; + + switch (action) { + case QCOM_SSR_BEFORE_POWERUP: + ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem starting event\n"); + clear_bit(ATH10K_SNOC_FLAG_UNREGISTERING, &ar_snoc->flags); + break; + + case QCOM_SSR_AFTER_POWERUP: + ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem running event\n"); + break; + + case QCOM_SSR_BEFORE_SHUTDOWN: + ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem %s event\n", + notify_data->crashed ? "crashed" : "stopping"); + if (!notify_data->crashed) + set_bit(ATH10K_SNOC_FLAG_UNREGISTERING, &ar_snoc->flags); + else + clear_bit(ATH10K_SNOC_FLAG_UNREGISTERING, &ar_snoc->flags); + break; + + case QCOM_SSR_AFTER_SHUTDOWN: + ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem offline event\n"); + break; + + default: + ath10k_err(ar, "received unrecognized event %lu\n", action); + break; + } + + return NOTIFY_OK; +} + +static int ath10k_modem_init(struct ath10k *ar) +{ + struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar); + void *notifier; + int ret; + + ar_snoc->nb.notifier_call = ath10k_snoc_modem_notify; + + notifier = qcom_register_ssr_notifier("mpss", &ar_snoc->nb); + if (IS_ERR(notifier)) { + ret = PTR_ERR(notifier); + ath10k_err(ar, "failed to initialize modem notifier: %d\n", ret); + return ret; + } + + ar_snoc->notifier = notifier; + + return 0; +} + +static void ath10k_modem_deinit(struct ath10k *ar) +{ + int ret; + struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar); + + ret = qcom_unregister_ssr_notifier(ar_snoc->notifier, &ar_snoc->nb); + if (ret) + ath10k_err(ar, "error %d unregistering notifier\n", ret); +} + static int ath10k_setup_msa_resources(struct ath10k *ar, u32 msa_size) { struct device *dev = ar->dev; @@ -1740,10 +1809,17 @@ static int ath10k_snoc_probe(struct platform_device *pdev) goto err_fw_deinit; } + ret = ath10k_modem_init(ar); + if (ret) + goto err_qmi_deinit; + ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc probe\n"); return 0; +err_qmi_deinit: + ath10k_qmi_deinit(ar); + err_fw_deinit: ath10k_fw_deinit(ar); @@ -1771,6 +1847,7 @@ static int ath10k_snoc_free_resources(struct ath10k *ar) ath10k_fw_deinit(ar); ath10k_snoc_free_irq(ar); ath10k_snoc_release_resource(ar); + ath10k_modem_deinit(ar); ath10k_qmi_deinit(ar); ath10k_core_destroy(ar); diff --git a/drivers/net/wireless/ath/ath10k/snoc.h b/drivers/net/wireless/ath/ath10k/snoc.h index 5095d1893681..d986edc772f8 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.h +++ b/drivers/net/wireless/ath/ath10k/snoc.h @@ -6,6 +6,8 @@ #ifndef _SNOC_H_ #define _SNOC_H_ +#include + #include "hw.h" #include "ce.h" #include "qmi.h" @@ -75,6 +77,8 @@ struct ath10k_snoc { struct clk_bulk_data *clks; size_t num_clks; struct ath10k_qmi *qmi; + struct notifier_block nb; + void *notifier; unsigned long flags; bool xo_cal_supported; u32 xo_cal_data;