From mboxrd@z Thu Jan 1 00:00:00 1970 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=-11.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 9516CC388F7 for ; Mon, 9 Nov 2020 12:08:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2DA10207BC for ; Mon, 9 Nov 2020 12:08:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="z8cwZptV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729687AbgKIMIe (ORCPT ); Mon, 9 Nov 2020 07:08:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729651AbgKIMId (ORCPT ); Mon, 9 Nov 2020 07:08:33 -0500 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29993C0613CF for ; Mon, 9 Nov 2020 04:08:32 -0800 (PST) Received: by mail-pf1-x442.google.com with SMTP id c20so7981493pfr.8 for ; Mon, 09 Nov 2020 04:08:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=sYZlhxozQgEvlS+NNVIJ/aB7eGsfKrhfyl/qVNIo11E=; b=z8cwZptV/a7LEfyiMbIZrV6S/mtNo0uR8gM9D4quJp5aa+TxpTW24tFfuZ4ALf8uE4 34zdgtpxrr65iQMUFNbS5VZumGtDjAnCWxNlgf9lDxTpLSxkaYGq9qndpHkj4CgyI2tp enSPNx+QQ6+2bfd2xhsKAoUuNxZaXgYHtdwmSl2GXI5MiHUO0gFZKBuqE5C7MW1RjQ9k b2DojHZcDSpGeYsirwQqvWLtGInlzELYvbzjHGEoa1z0yb7LadUzkWLh/HZDtfwcjs1U +rKKSMYBRmSrnHaPlmZK0Lrh9zKp2vZktzk1OQ74Hq1TuX0faF0ADRJOuMCMAfUAsgfc 8xng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=sYZlhxozQgEvlS+NNVIJ/aB7eGsfKrhfyl/qVNIo11E=; b=OdRA5/ijdxUy99hpkJyG9JsYzMLvj5rlqZEFvFIC+O6hrfcmmAJQVRaYa7eMYMZgIU bLwXaKQGL9p4q0DGYR9Ip6ushhzcEWa0hYOZoHUkcfoTydLIUcaICZ8Ge2dJPsZaMGJT TMyMd5RDVR9fheT0Y5S5fBlOQjLvxEUfZvC7Hg0ueM+y/8/AZ2qRQ2C72ZT9avlQITog n3b/zwYUE3CQqzBmvJz5V3YQ3LnFdjhrfVuZI7xR3WEx3mGDqshg2a3iU+nGAMHPL0Lx XaKj+mR1xGiTydTtig3Wm1tCjsPx1J74hzF5fI8AFGFG9RTTZubvPSU9E2z71DQ03DV+ iWrQ== X-Gm-Message-State: AOAM5310BD/h8zLcoqI2XV1xHVKuqPVN9oFWOoaYqNkHusk1n2nQOVuC zDsdeDogfTbPYPNn5x/NXLLS X-Google-Smtp-Source: ABdhPJxY4xS6lDh4ZRNTEFYmxOtjt5t4JTvxZ9W5QEcXk9D2n6sJ/WF5r6bPqKFetF5lKheJLMT6pg== X-Received: by 2002:a17:90a:8b08:: with SMTP id y8mr12438935pjn.5.1604923711702; Mon, 09 Nov 2020 04:08:31 -0800 (PST) Received: from work ([103.59.133.81]) by smtp.gmail.com with ESMTPSA id a24sm11377928pfl.174.2020.11.09.04.08.29 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 09 Nov 2020 04:08:30 -0800 (PST) Date: Mon, 9 Nov 2020 17:38:25 +0530 From: Manivannan Sadhasivam To: Bhaumik Bhatt Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 6/6] bus: mhi: core: Skip RDDM download for unknown execution environment Message-ID: <20201109120825.GJ24289@work> References: <1604684690-31065-1-git-send-email-bbhatt@codeaurora.org> <1604684690-31065-7-git-send-email-bbhatt@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1604684690-31065-7-git-send-email-bbhatt@codeaurora.org> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 06, 2020 at 09:44:50AM -0800, Bhaumik Bhatt wrote: > If MHI is unable to determine the execution environment during > the panic path, host must skip the RDDM download. This can happen > if the BHI offset read or the BHI_EXECENV register read fails > indicating that the underlying transport is unresponsive. Hence, > there is no need to trigger an RDDM using SYSERR or request an > SOC reset. > > Suggested-by: Hemant Kumar > Signed-off-by: Bhaumik Bhatt Reviewed-by: Manivannan Sadhasivam Thanks, Mani > --- > drivers/bus/mhi/core/boot.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c > index 16244cc..6f0cfb9 100644 > --- a/drivers/bus/mhi/core/boot.c > +++ b/drivers/bus/mhi/core/boot.c > @@ -92,6 +92,9 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl) > * image download completion. > */ > ee = mhi_get_exec_env(mhi_cntrl); > + if (ee == MHI_EE_MAX) > + goto error_exit_rddm; > + > if (ee != MHI_EE_RDDM) { > dev_dbg(dev, "Trigger device into RDDM mode using SYS ERR\n"); > mhi_set_mhi_state(mhi_cntrl, MHI_STATE_SYS_ERR); > @@ -139,10 +142,12 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl) > ee = mhi_get_exec_env(mhi_cntrl); > ret = mhi_read_reg(mhi_cntrl, base, BHIE_RXVECSTATUS_OFFS, &rx_status); > > - dev_err(dev, "Did not complete RDDM transfer\n"); > - dev_err(dev, "Current EE: %s\n", TO_MHI_EXEC_STR(ee)); > dev_err(dev, "RXVEC_STATUS: 0x%x\n", rx_status); > > +error_exit_rddm: > + dev_err(dev, "RDDM transfer failed. Current EE: %s\n", > + TO_MHI_EXEC_STR(ee)); > + > return -EIO; > } > > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >