From patchwork Wed Apr 22 04:19:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502851 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8980A81 for ; Wed, 22 Apr 2020 04:31:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7191320747 for ; Wed, 22 Apr 2020 04:31:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="XpQyJrcp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725808AbgDVEby (ORCPT ); Wed, 22 Apr 2020 00:31:54 -0400 Received: from mail26.static.mailgun.info ([104.130.122.26]:24835 "EHLO mail26.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725355AbgDVEbx (ORCPT ); Wed, 22 Apr 2020 00:31:53 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587529913; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=9ajINjyxVnZz0xrqD52l756TPDsznJMo9dg0aqFR6yM=; b=XpQyJrcpjotvDvVgGnLg+0FBcjm3pmb2moUcb5XrZUxjfTCbxgaVPXOsYPNESfYG3icWnUyh 7cw0N/CU2TNsYAGR/pBTS+vISYU+TiXhiRB5TyH1yiJMNuek0JonrYVujo/JN2JraUE3/qcb Ad6ZvgM4JzfKBfk//Mt9q08SNjc= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9fc5e6.7fc3729ee8f0-smtp-out-n03; Wed, 22 Apr 2020 04:19:50 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 548A7C433F2; Wed, 22 Apr 2020 04:19:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id B9DE9C433D2; Wed, 22 Apr 2020 04:19:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B9DE9C433D2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Hemant Kumar Subject: [PATCH v1 1/8] bus: mhi: core: Cache intmod from mhi event to mhi channel Date: Tue, 21 Apr 2020 21:19:28 -0700 Message-Id: <1587529175-27778-2-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Hemant Kumar Driver is using zero initialized intmod value from mhi channel when configuring TRE for bei field. This prevents interrupt moderation to take effect in case it is supported by an event ring. Fix this by copying intmod value from associated event ring to mhi channel upon registering mhi controller. Signed-off-by: Hemant Kumar --- drivers/bus/mhi/core/init.c | 4 ++++ drivers/bus/mhi/core/main.c | 9 ++++++--- 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index b38359c..4dc7f22 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -864,6 +864,10 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl, mutex_init(&mhi_chan->mutex); init_completion(&mhi_chan->completion); rwlock_init(&mhi_chan->lock); + + /* used in setting bei field of TRE */ + mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index]; + mhi_chan->intmod = mhi_event->intmod; } if (mhi_cntrl->bounce_buf) { diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index eb4256b..23154f1 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -929,7 +929,7 @@ int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir, struct mhi_ring *buf_ring = &mhi_chan->buf_ring; struct mhi_buf_info *buf_info; struct mhi_tre *mhi_tre; - int ret; + int ret, bei; /* If MHI host pre-allocates buffers then client drivers cannot queue */ if (mhi_chan->pre_alloc) @@ -966,10 +966,11 @@ int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir, goto map_error; mhi_tre = tre_ring->wp; + bei = !!(mhi_chan->intmod); mhi_tre->ptr = MHI_TRE_DATA_PTR(buf_info->p_addr); mhi_tre->dword[0] = MHI_TRE_DATA_DWORD0(buf_info->len); - mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(1, 1, 0, 0); + mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(bei, 1, 0, 0); /* increment WP */ mhi_add_ring_element(mhi_cntrl, tre_ring); @@ -1006,6 +1007,7 @@ int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir, struct mhi_ring *buf_ring = &mhi_chan->buf_ring; struct mhi_buf_info *buf_info; struct mhi_tre *mhi_tre; + int bei; /* If MHI host pre-allocates buffers then client drivers cannot queue */ if (mhi_chan->pre_alloc) @@ -1043,10 +1045,11 @@ int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir, buf_info->len = len; mhi_tre = tre_ring->wp; + bei = !!(mhi_chan->intmod); mhi_tre->ptr = MHI_TRE_DATA_PTR(buf_info->p_addr); mhi_tre->dword[0] = MHI_TRE_DATA_DWORD0(buf_info->len); - mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(1, 1, 0, 0); + mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(bei, 1, 0, 0); /* increment WP */ mhi_add_ring_element(mhi_cntrl, tre_ring); From patchwork Wed Apr 22 04:19:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502839 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D5F0992C for ; Wed, 22 Apr 2020 04:19:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEE4920747 for ; Wed, 22 Apr 2020 04:19:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="KibRwLCv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726380AbgDVET5 (ORCPT ); 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Wed, 22 Apr 2020 04:19:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 1B40DC433BA; Wed, 22 Apr 2020 04:19:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1B40DC433BA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Hemant Kumar Subject: [PATCH v1 2/8] bus: mhi: core: Add range check for channel id received in event ring Date: Tue, 21 Apr 2020 21:19:29 -0700 Message-Id: <1587529175-27778-3-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Hemant Kumar MHI data completion handler function reads channel id from event ring element. Value is under the control of MHI devices and can be any value between 0 and 255. In order to prevent out of bound access add a bound check against the max channel supported by controller and skip processing of that event ring element. Signed-off-by: Hemant Kumar --- drivers/bus/mhi/core/main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 23154f1..ba8afa7 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -827,6 +827,9 @@ int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl, enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp); chan = MHI_TRE_GET_EV_CHID(local_rp); + if (WARN_ON(chan >= mhi_cntrl->max_chan)) + continue; + mhi_chan = &mhi_cntrl->mhi_chan[chan]; if (likely(type == MHI_PKT_TYPE_TX_EVENT)) { From patchwork Wed Apr 22 04:19:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502841 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 719FD92C for ; Wed, 22 Apr 2020 04:20:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 594232076E for ; Wed, 22 Apr 2020 04:20:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="v8iQQC30" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726436AbgDVEUP (ORCPT ); Wed, 22 Apr 2020 00:20:15 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:35344 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726413AbgDVEUD (ORCPT ); Wed, 22 Apr 2020 00:20:03 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587529203; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=MHoovFjqIgRjM0iNs1686zpLeAHruEipp19zTMHZoiI=; b=v8iQQC30H2Mm8eChrOJsQZnRo/YQ8Ut/N8+ReWhh6vNAeXTuW11firVW8bXuz3R3wiVM8Pm6 iOYXEW0RZ27iVl3aYncx1giAs+YsjTkCEqOvYZUcTAxS+c6BG5SQKk4HHY7fM9uV1UZ1Y+5n 4YOy+ZMQs2aFKjso0Bhg6/+WH90= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9fc5e8.7f003bbc3998-smtp-out-n01; Wed, 22 Apr 2020 04:19:52 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3D72CC4478C; Wed, 22 Apr 2020 04:19:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 6AC8BC432C2; Wed, 22 Apr 2020 04:19:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6AC8BC432C2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Hemant Kumar Subject: [PATCH v1 3/8] bus: mhi: core: Read transfer length from an event properly Date: Tue, 21 Apr 2020 21:19:30 -0700 Message-Id: <1587529175-27778-4-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Hemant Kumar When MHI Driver receives an EOT event, it reads xfer_len from the event in the last TRE. The value is under control of the MHI device and never validated by Host MHI driver. The value should never be larger than the real size of the buffer but a malicious device can set the value 0xFFFF as maximum. This causes device to memory overflow (both read or write). Fix this issue by reading minimum of transfer length from event and the buffer length provided. Signed-off-by: Hemant Kumar --- drivers/bus/mhi/core/main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index ba8afa7..3802d3b 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -521,7 +521,8 @@ static int parse_xfer_event(struct mhi_controller *mhi_cntrl, mhi_cntrl->unmap_single(mhi_cntrl, buf_info); result.buf_addr = buf_info->cb_buf; - result.bytes_xferd = xfer_len; + result.bytes_xferd = + min_t(u16, xfer_len, buf_info->len); mhi_del_ring_element(mhi_cntrl, buf_ring); mhi_del_ring_element(mhi_cntrl, tre_ring); local_rp = tre_ring->rp; From patchwork Wed Apr 22 04:19:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502845 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 387F215AB for ; Wed, 22 Apr 2020 04:20:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 205972076A for ; Wed, 22 Apr 2020 04:20:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="RuFMmEgd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726413AbgDVEUQ (ORCPT ); Wed, 22 Apr 2020 00:20:16 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:28445 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726389AbgDVEUD (ORCPT ); Wed, 22 Apr 2020 00:20:03 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587529201; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=B9QhyAjKdbua8fY9DrfrNQ5WfANanGspAv/4uS5Zs6U=; b=RuFMmEgdhW745+YkiIwz4ta/px3QrV+LlWQcYksa24YTNjGgz+17VPBkf6vNX3xsqGiMuLBK mzCAR8rS+7J44kLSLEjx4RJbGfRE8dmO9ZVQm5AAlyyN7nz377/k14WUOkM+aKyUo+m5C1Vn nH9sYpxUfrYI1mAe+3uTmPPiaCo= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9fc5e8.7f887afc2650-smtp-out-n01; Wed, 22 Apr 2020 04:19:52 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 8583AC433CB; Wed, 22 Apr 2020 04:19:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id BA53DC433F2; Wed, 22 Apr 2020 04:19:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BA53DC433F2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v1 4/8] bus: mhi: core: Handle firmware load using state worker Date: Tue, 21 Apr 2020 21:19:31 -0700 Message-Id: <1587529175-27778-5-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Upon power up, driver queues firmware worker thread if the execution environment is PBL. Firmware worker is blocked with a timeout until state worker gets a chance to run and unblock firmware worker. An endpoint power up failure can be seen if state worker gets a chance to run after firmware worker has timed out. Remove this dependency and handle firmware load directly using state worker thread. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/boot.c | 18 +++--------------- drivers/bus/mhi/core/init.c | 1 - drivers/bus/mhi/core/internal.h | 1 + drivers/bus/mhi/core/pm.c | 6 +----- include/linux/mhi.h | 2 -- 5 files changed, 5 insertions(+), 23 deletions(-) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index ebad5eb..17c636b 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -377,30 +377,18 @@ static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl, } } -void mhi_fw_load_worker(struct work_struct *work) +void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) { - struct mhi_controller *mhi_cntrl; const struct firmware *firmware = NULL; struct image_info *image_info; - struct device *dev; + struct device *dev = &mhi_cntrl->mhi_dev->dev; const char *fw_name; void *buf; dma_addr_t dma_addr; size_t size; int ret; - mhi_cntrl = container_of(work, struct mhi_controller, fw_worker); - dev = &mhi_cntrl->mhi_dev->dev; - - dev_dbg(dev, "Waiting for device to enter PBL from: %s\n", - TO_MHI_EXEC_STR(mhi_cntrl->ee)); - - ret = wait_event_timeout(mhi_cntrl->state_event, - MHI_IN_PBL(mhi_cntrl->ee) || - MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state), - msecs_to_jiffies(mhi_cntrl->timeout_ms)); - - if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) { + if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) { dev_err(dev, "Device MHI is not in valid state\n"); return; } diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index 4dc7f22..e92a20a 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -836,7 +836,6 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl, spin_lock_init(&mhi_cntrl->wlock); INIT_WORK(&mhi_cntrl->st_worker, mhi_pm_st_worker); INIT_WORK(&mhi_cntrl->syserr_worker, mhi_pm_sys_err_worker); - INIT_WORK(&mhi_cntrl->fw_worker, mhi_fw_load_worker); init_waitqueue_head(&mhi_cntrl->state_event); mhi_cmd = mhi_cntrl->mhi_cmd; diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h index 5deadfa..4919a43 100644 --- a/drivers/bus/mhi/core/internal.h +++ b/drivers/bus/mhi/core/internal.h @@ -630,6 +630,7 @@ void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl, void mhi_deinit_free_irq(struct mhi_controller *mhi_cntrl); void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl, struct image_info *img_info); +void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl); int mhi_prepare_channel(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan); int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl, diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 52690cb..dc90a71 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -528,7 +528,6 @@ static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl, dev_dbg(dev, "Waiting for all pending threads to complete\n"); wake_up_all(&mhi_cntrl->state_event); flush_work(&mhi_cntrl->st_worker); - flush_work(&mhi_cntrl->fw_worker); dev_dbg(dev, "Reset all active channels and remove MHI devices\n"); device_for_each_child(mhi_cntrl->cntrl_dev, NULL, mhi_destroy_device); @@ -643,7 +642,7 @@ void mhi_pm_st_worker(struct work_struct *work) mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl); write_unlock_irq(&mhi_cntrl->pm_lock); if (MHI_IN_PBL(mhi_cntrl->ee)) - wake_up_all(&mhi_cntrl->state_event); + mhi_fw_load_handler(mhi_cntrl); break; case DEV_ST_TRANSITION_SBL: write_lock_irq(&mhi_cntrl->pm_lock); @@ -833,9 +832,6 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl) next_state = MHI_IN_PBL(current_ee) ? DEV_ST_TRANSITION_PBL : DEV_ST_TRANSITION_READY; - if (next_state == DEV_ST_TRANSITION_PBL) - schedule_work(&mhi_cntrl->fw_worker); - mhi_queue_state_transition(mhi_cntrl, next_state); mutex_unlock(&mhi_cntrl->pm_mutex); diff --git a/include/linux/mhi.h b/include/linux/mhi.h index ad19960..cda7305 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -331,7 +331,6 @@ struct mhi_controller_config { * @wlock: Lock for protecting device wakeup * @mhi_link_info: Device bandwidth info * @st_worker: State transition worker - * @fw_worker: Firmware download worker * @syserr_worker: System error worker * @state_event: State change event * @status_cb: CB function to notify power states of the device (required) @@ -411,7 +410,6 @@ struct mhi_controller { spinlock_t wlock; struct mhi_link_info mhi_link_info; struct work_struct st_worker; - struct work_struct fw_worker; struct work_struct syserr_worker; wait_queue_head_t state_event; From patchwork Wed Apr 22 04:19:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502835 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7246115AB for ; Wed, 22 Apr 2020 04:19:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 596BF20706 for ; Wed, 22 Apr 2020 04:19:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="iZNDqx6O" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725899AbgDVETy (ORCPT ); Wed, 22 Apr 2020 00:19:54 -0400 Received: from mail26.static.mailgun.info ([104.130.122.26]:26751 "EHLO mail26.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725808AbgDVETy (ORCPT ); Wed, 22 Apr 2020 00:19:54 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587529194; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=jNSPiheV+d47ns/l8Ch/Ze/Q8LvlI/1DRVaErfIZ8Mw=; b=iZNDqx6OP14UZrMF+hkbobQ4+78VxmXCCYTvp8B3XuLwm5FOGuL96xGWMkTNV/oP6KaNIiK0 W4ODZaMRMd3M4JPxeKc/BBD9xmCOvB7//Q+dwayLJQimePxMRfb6rRELsiIj5JwpyuFrMgok bdngwvEfXdEPDfKJZWVH/5bWnoI= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9fc5e8.7f90cac94260-smtp-out-n04; Wed, 22 Apr 2020 04:19:52 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 47531C432C2; Wed, 22 Apr 2020 04:19:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 0F6BAC433CB; Wed, 22 Apr 2020 04:19:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 0F6BAC433CB Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v1 5/8] bus: mhi: core: WARN_ON for malformed vector table Date: Tue, 21 Apr 2020 21:19:32 -0700 Message-Id: <1587529175-27778-6-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add a bounds check in the firmware copy routine to exit if a malformed vector table is found while attempting to load the firmware in to the BHIe vector table. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/boot.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index 17c636b..bc70edc 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -362,8 +362,14 @@ static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl, int i = 0; struct mhi_buf *mhi_buf = img_info->mhi_buf; struct bhi_vec_entry *bhi_vec = img_info->bhi_vec; + struct device *dev = &mhi_cntrl->mhi_dev->dev; while (remainder) { + if (WARN_ON(i >= img_info->entries)) { + dev_err(dev, "Malformed vector table\n"); + return; + } + to_cpy = min(remainder, mhi_buf->len); memcpy(mhi_buf->buf, buf, to_cpy); bhi_vec->dma_addr = mhi_buf->dma_addr; From patchwork Wed Apr 22 04:19:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502847 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ED88D92C for ; Wed, 22 Apr 2020 04:20:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D34B92076A for ; Wed, 22 Apr 2020 04:20:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="SGUHgy50" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726516AbgDVEUW (ORCPT ); Wed, 22 Apr 2020 00:20:22 -0400 Received: from mail26.static.mailgun.info ([104.130.122.26]:64155 "EHLO mail26.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726400AbgDVEUC (ORCPT ); Wed, 22 Apr 2020 00:20:02 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587529201; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=WIo04m5DvvXhO1a8uko76GWkE9AMVf53ZeZpDgYxOKs=; b=SGUHgy50eb6KIxEqiGIsvhwNU9chjbfpzD45sJmherBuGQBHiWrVXv8EiJ5XoD4pvEOosEwg Xi9W1vLTN2Vxv3/0Xg56C86nIfy9fJ7foNAhZMTq0r0DGAj8XKiwoNGhmFJxTJajF7V3Ne66 ETzk2zJZad3+xagUM98haAa90u4= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9fc5e7.7fe344cf5768-smtp-out-n02; Wed, 22 Apr 2020 04:19:51 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id CFD39C43637; Wed, 22 Apr 2020 04:19:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 61A18C433BA; Wed, 22 Apr 2020 04:19:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 61A18C433BA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v1 6/8] bus: mhi: core: Return appropriate error codes for AMSS load failure Date: Tue, 21 Apr 2020 21:19:33 -0700 Message-Id: <1587529175-27778-7-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org When loading AMSS firmware using BHIe protocol, return -ETIMEDOUT if no response is received within the timeout or return -EIO in case of a protocol returned failure or an MHI error state. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/boot.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index bc70edc..4e49a0e 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -176,6 +176,7 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl, void __iomem *base = mhi_cntrl->bhie; rwlock_t *pm_lock = &mhi_cntrl->pm_lock; u32 tx_status, sequence_id; + int ret; read_lock_bh(pm_lock); if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) { @@ -198,19 +199,19 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl, read_unlock_bh(pm_lock); /* Wait for the image download to complete */ - wait_event_timeout(mhi_cntrl->state_event, - MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) || - mhi_read_reg_field(mhi_cntrl, base, - BHIE_TXVECSTATUS_OFFS, - BHIE_TXVECSTATUS_STATUS_BMSK, - BHIE_TXVECSTATUS_STATUS_SHFT, - &tx_status) || tx_status, - msecs_to_jiffies(mhi_cntrl->timeout_ms)); - - if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) + ret = wait_event_timeout(mhi_cntrl->state_event, + MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) || + mhi_read_reg_field(mhi_cntrl, base, + BHIE_TXVECSTATUS_OFFS, + BHIE_TXVECSTATUS_STATUS_BMSK, + BHIE_TXVECSTATUS_STATUS_SHFT, + &tx_status) || tx_status, + msecs_to_jiffies(mhi_cntrl->timeout_ms)); + if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state) || + tx_status != BHIE_TXVECSTATUS_STATUS_XFER_COMPL) return -EIO; - return (tx_status == BHIE_TXVECSTATUS_STATUS_XFER_COMPL) ? 0 : -EIO; + return (!ret) ? -ETIMEDOUT : 0; } static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl, From patchwork Wed Apr 22 04:19:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502849 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DEF0A15AB for ; Wed, 22 Apr 2020 04:20:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C767220747 for ; Wed, 22 Apr 2020 04:20:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="IhLF9WeD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726066AbgDVEU1 (ORCPT ); Wed, 22 Apr 2020 00:20:27 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:35344 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725835AbgDVET7 (ORCPT ); Wed, 22 Apr 2020 00:19:59 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1587529199; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=lCTsgEWMTt3U5oHW/87m59ypKpEeo0ETAuLI4cY6/+c=; b=IhLF9WeDVm34HWz1SF9Eg/6/tUWaJnOY1G/A+D/e3cVwWcPBgmeDHHe0tIjSxG2YHEWOfs5n 9+VurviPMnfz4QHVPPMtSfeSmYsU04FirXsN4q6yVyrIMseW6Hb2dILaVfiQ9059d7imUYVg pH5K7iOMHLO0AW3UtMbT6HDiie0= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e9fc5e8.7fae422d7a78-smtp-out-n03; Wed, 22 Apr 2020 04:19:52 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 36F0CC43637; Wed, 22 Apr 2020 04:19:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id B0EF2C433D2; Wed, 22 Apr 2020 04:19:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B0EF2C433D2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v1 7/8] bus: mhi: core: Improve debug logs for loading firmware Date: Tue, 21 Apr 2020 21:19:34 -0700 Message-Id: <1587529175-27778-8-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add log messages to track boot flow errors and timeouts in SBL or AMSS firmware loading to aid in debug. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/boot.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index 4e49a0e..0bc9c50 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -121,7 +121,8 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl) ee = mhi_get_exec_env(mhi_cntrl); } - dev_dbg(dev, "Waiting for image download completion, current EE: %s\n", + dev_dbg(dev, + "Waiting for RDDM image download via BHIe, current EE:%s\n", TO_MHI_EXEC_STR(ee)); while (retry--) { @@ -152,11 +153,14 @@ static int __mhi_download_rddm_in_panic(struct mhi_controller *mhi_cntrl) int mhi_download_rddm_img(struct mhi_controller *mhi_cntrl, bool in_panic) { void __iomem *base = mhi_cntrl->bhie; + struct device *dev = &mhi_cntrl->mhi_dev->dev; u32 rx_status; if (in_panic) return __mhi_download_rddm_in_panic(mhi_cntrl); + dev_dbg(dev, "Waiting for RDDM image download via BHIe\n"); + /* Wait for the image download to complete */ wait_event_timeout(mhi_cntrl->state_event, mhi_read_reg_field(mhi_cntrl, base, @@ -174,6 +178,7 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl, const struct mhi_buf *mhi_buf) { void __iomem *base = mhi_cntrl->bhie; + struct device *dev = &mhi_cntrl->mhi_dev->dev; rwlock_t *pm_lock = &mhi_cntrl->pm_lock; u32 tx_status, sequence_id; int ret; @@ -184,6 +189,7 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl, return -EIO; } + dev_dbg(dev, "Starting AMSS download via BHIe\n"); mhi_write_reg(mhi_cntrl, base, BHIE_TXVECADDR_HIGH_OFFS, upper_32_bits(mhi_buf->dma_addr)); @@ -441,7 +447,12 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) release_firmware(firmware); /* Error or in EDL mode, we're done */ - if (ret || mhi_cntrl->ee == MHI_EE_EDL) + if (ret) { + dev_err(dev, "MHI did not load SBL, ret:%d\n", ret); + return; + } + + if (mhi_cntrl->ee == MHI_EE_EDL) return; write_lock_irq(&mhi_cntrl->pm_lock); @@ -469,8 +480,10 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) if (!mhi_cntrl->fbc_download) return; - if (ret) + if (ret) { + dev_err(dev, "MHI did not enter READY state\n"); goto error_read; + } /* Wait for the SBL event */ ret = wait_event_timeout(mhi_cntrl->state_event, @@ -488,6 +501,8 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) ret = mhi_fw_load_amss(mhi_cntrl, /* Vector table is the last entry */ &image_info->mhi_buf[image_info->entries - 1]); + if (ret) + dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret); release_firmware(firmware); From patchwork Wed Apr 22 04:19:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11502837 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3E73215AB for ; Wed, 22 Apr 2020 04:19:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25FB42075E for ; 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Wed, 22 Apr 2020 04:19:52 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 77721C432C2; Wed, 22 Apr 2020 04:19:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 0B8EFC43636; Wed, 22 Apr 2020 04:19:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 0B8EFC43636 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v1 8/8] bus: mhi: core: Ensure non-zero session or sequence ID values Date: Tue, 21 Apr 2020 21:19:35 -0700 Message-Id: <1587529175-27778-9-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> References: <1587529175-27778-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org While writing any sequence or session identifiers, it is possible that the host could write a zero value, whereas only non-zero values are supported writes to those registers. Ensure that host does not write a non-zero value for those cases. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/boot.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index 0bc9c50..c9971d4 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -199,6 +199,9 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl, mhi_write_reg(mhi_cntrl, base, BHIE_TXVECSIZE_OFFS, mhi_buf->len); sequence_id = prandom_u32() & BHIE_TXVECSTATUS_SEQNUM_BMSK; + if (unlikely(!sequence_id)) + sequence_id = 1; + mhi_write_reg_field(mhi_cntrl, base, BHIE_TXVECDB_OFFS, BHIE_TXVECDB_SEQNUM_BMSK, BHIE_TXVECDB_SEQNUM_SHFT, sequence_id); @@ -254,6 +257,9 @@ static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl, lower_32_bits(dma_addr)); mhi_write_reg(mhi_cntrl, base, BHI_IMGSIZE, size); session_id = prandom_u32() & BHI_TXDB_SEQNUM_BMSK; + if (unlikely(!session_id)) + session_id = 1; + mhi_write_reg(mhi_cntrl, base, BHI_IMGTXDB, session_id); read_unlock_bh(pm_lock);