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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 E6498C48BC2 for ; Fri, 25 Jun 2021 12:34:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB60861883 for ; Fri, 25 Jun 2021 12:34:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231519AbhFYMgo (ORCPT ); Fri, 25 Jun 2021 08:36:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231408AbhFYMgh (ORCPT ); Fri, 25 Jun 2021 08:36:37 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0E70C061768 for ; Fri, 25 Jun 2021 05:34:16 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id c8so7943557pfp.5 for ; Fri, 25 Jun 2021 05:34:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=hj7+vE89NLcN6VtiJk8liEDNDGGaHkJP2vUV3wC5YME=; b=hiT+ldacaYWUgBD9Aop2Z0rZq+1KBV2BrcyDluGMooPqHzj4xQEhy91jM41LMO40YL 5h23h+xhkWLqhSCIjniylNnTByCSIIPo5i/GcOyzSV8ku/xM2Pc94fZYy6mdfrPjGPuu bGQvSGWYNuoWN7hHfAIfRaMlffyRK9jqlfBvhAdvu01b2YRp2uZih7PLh3osBYmcy1d8 zasIV9yTEc8Z9sG+QBLJgSo4j+yTKe8yxI6RKuxh2dsW9oFIEMKefv5mlSoT7O015vle G5tzqe3JNIfmCekQnh8ddk4wW4MckttCW4MPTtnTXT9OLHXtIjm3HXDVBONstSdB87Jt RcXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=hj7+vE89NLcN6VtiJk8liEDNDGGaHkJP2vUV3wC5YME=; b=YqCewEAOznI9MTDQf1TqzvXTiT82UsioWHfNBcJI7QQKZxeYP1hhsX8c6Ok37kLjip A0IFcKPs9ezIHZR2wMGXOUtRVY9wOMyGmMvqo/XHwYx6KOHg5jZIFy6OvzTfWR3nwA0/ huYvl8nwg7mdqqTS2J8l2PGgexVos618HvwMMi2/1jOuFmLzwVZ1ssJEWEOZNBEGN0KK +aeogYhPmUROjR8+DeMsV2Hl2zRBvaAiBIk45201Uej8X6NRdNOVbAreTb+4cLb/7NhZ k3eWqe9Ac19YM9O5+G2OWYApOQM/768gm3cbw2tdUzme8aHsL5ovrO85GdtZutgoeojy ZL7g== X-Gm-Message-State: AOAM5300GN7A3wL4KHyb1SZjsuAdaNEliziwNJrk648f8YoRk/r2A5wi N5GNTDs2UjbaWs69Z1gOpZKB X-Google-Smtp-Source: ABdhPJyjqOlTULFpol+Xs4Wosx3XebgfiArnJfF9WCCaC7Y7zYefUtzJ64pH+8YHnN4ZVtnhu5Xhyw== X-Received: by 2002:a05:6a00:810:b029:301:f08c:6b0d with SMTP id m16-20020a056a000810b0290301f08c6b0dmr10387776pfk.8.1624624456392; Fri, 25 Jun 2021 05:34:16 -0700 (PDT) Received: from localhost.localdomain ([2409:4072:600b:2a0:ed5d:53e7:c64e:1bac]) by smtp.gmail.com with ESMTPSA id y7sm6077780pfy.153.2021.06.25.05.34.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Jun 2021 05:34:15 -0700 (PDT) From: Manivannan Sadhasivam To: gregkh@linuxfoundation.org Cc: hemantk@codeaurora.org, bbhatt@codeaurora.org, linux-arm-msm@vger.kernel.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, loic.poulain@linaro.org, kvalo@codeaurora.org, ath11k@lists.infradead.org, Manivannan Sadhasivam , Jakub Kicinski Subject: [PATCH 01/10] bus: mhi: Add inbound buffers allocation flag Date: Fri, 25 Jun 2021 18:03:46 +0530 Message-Id: <20210625123355.11578-2-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210625123355.11578-1-manivannan.sadhasivam@linaro.org> References: <20210625123355.11578-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Loic Poulain Currently, the MHI controller driver defines which channels should have their inbound buffers allocated and queued. But ideally, this is something that should be decided by the MHI device driver instead, which actually deals with that buffers. Add a flag parameter to mhi_prepare_for_transfer allowing to specify if buffers have to be allocated and queued by the MHI stack. Keep auto_queue flag for now, but should be removed at some point. Signed-off-by: Loic Poulain Tested-by: Bhaumik Bhatt Reviewed-by: Bhaumik Bhatt Reviewed-by: Hemant Kumar Reviewed-by: Manivannan Sadhasivam Acked-by: Jakub Kicinski Link: https://lore.kernel.org/r/1624566520-20406-1-git-send-email-loic.poulain@linaro.org Signed-off-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/internal.h | 2 +- drivers/bus/mhi/core/main.c | 9 ++++++--- drivers/net/mhi/net.c | 2 +- drivers/net/wwan/mhi_wwan_ctrl.c | 2 +- include/linux/mhi.h | 7 ++++++- net/qrtr/mhi.c | 2 +- 6 files changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h index 5b9ea66b92dc..bc239a11aa69 100644 --- a/drivers/bus/mhi/core/internal.h +++ b/drivers/bus/mhi/core/internal.h @@ -682,7 +682,7 @@ 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); + struct mhi_chan *mhi_chan, unsigned int flags); int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan); void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl, diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 22acde118bc3..69cd9dcde6d8 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -1423,7 +1423,7 @@ static void mhi_unprepare_channel(struct mhi_controller *mhi_cntrl, } int mhi_prepare_channel(struct mhi_controller *mhi_cntrl, - struct mhi_chan *mhi_chan) + struct mhi_chan *mhi_chan, unsigned int flags) { int ret = 0; struct device *dev = &mhi_chan->mhi_dev->dev; @@ -1448,6 +1448,9 @@ int mhi_prepare_channel(struct mhi_controller *mhi_cntrl, if (ret) goto error_pm_state; + if (mhi_chan->dir == DMA_FROM_DEVICE) + mhi_chan->pre_alloc = !!(flags & MHI_CH_INBOUND_ALLOC_BUFS); + /* Pre-allocate buffer for xfer ring */ if (mhi_chan->pre_alloc) { int nr_el = get_nr_avail_ring_elements(mhi_cntrl, @@ -1603,7 +1606,7 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan) } /* Move channel to start state */ -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev) +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags) { int ret, dir; struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl; @@ -1614,7 +1617,7 @@ int mhi_prepare_for_transfer(struct mhi_device *mhi_dev) if (!mhi_chan) continue; - ret = mhi_prepare_channel(mhi_cntrl, mhi_chan); + ret = mhi_prepare_channel(mhi_cntrl, mhi_chan, flags); if (ret) goto error_open_chan; } diff --git a/drivers/net/mhi/net.c b/drivers/net/mhi/net.c index 0d8293a47a56..774e32960e09 100644 --- a/drivers/net/mhi/net.c +++ b/drivers/net/mhi/net.c @@ -327,7 +327,7 @@ static int mhi_net_probe(struct mhi_device *mhi_dev, u64_stats_init(&mhi_netdev->stats.tx_syncp); /* Start MHI channels */ - err = mhi_prepare_for_transfer(mhi_dev); + err = mhi_prepare_for_transfer(mhi_dev, 0); if (err) goto out_err; diff --git a/drivers/net/wwan/mhi_wwan_ctrl.c b/drivers/net/wwan/mhi_wwan_ctrl.c index 1bc6b69aa530..1e18420ce404 100644 --- a/drivers/net/wwan/mhi_wwan_ctrl.c +++ b/drivers/net/wwan/mhi_wwan_ctrl.c @@ -110,7 +110,7 @@ static int mhi_wwan_ctrl_start(struct wwan_port *port) int ret; /* Start mhi device's channel(s) */ - ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev); + ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev, 0); if (ret) return ret; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 944aa3aa3035..5e08468854db 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -719,8 +719,13 @@ void mhi_device_put(struct mhi_device *mhi_dev); * host and device execution environments match and * channels are in a DISABLED state. * @mhi_dev: Device associated with the channels + * @flags: MHI channel flags */ -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev); +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev, + unsigned int flags); + +/* Automatically allocate and queue inbound buffers */ +#define MHI_CH_INBOUND_ALLOC_BUFS BIT(0) /** * mhi_unprepare_from_transfer - Reset UL and DL channels for data transfer. diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c index fa611678af05..29b4fa3b72ab 100644 --- a/net/qrtr/mhi.c +++ b/net/qrtr/mhi.c @@ -79,7 +79,7 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev, int rc; /* start channels */ - rc = mhi_prepare_for_transfer(mhi_dev); + rc = mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS); if (rc) return rc; -- 2.25.1