From patchwork Wed Oct 28 16:34:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loic Poulain X-Patchwork-Id: 311330 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=-12.8 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_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 4561BC55179 for ; Wed, 28 Oct 2020 22:08:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9016246C5 for ; Wed, 28 Oct 2020 22:08:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="gGqY+2qo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730247AbgJ1WIM (ORCPT ); Wed, 28 Oct 2020 18:08:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730433AbgJ1WH6 (ORCPT ); Wed, 28 Oct 2020 18:07:58 -0400 Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00E43C0613D1 for ; Wed, 28 Oct 2020 15:07:58 -0700 (PDT) Received: by mail-lj1-x241.google.com with SMTP id c21so954283ljj.0 for ; Wed, 28 Oct 2020 15:07:57 -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; bh=nh9xokiPkvqctf6o6zrnNObT3/K5gBk3pqgZqJN8Tz4=; b=gGqY+2qo6+4NBrOHXPjQznWhQil69vqLuQf/ygGqTj5nB8gqz9iyPlDsx3eW+mb/L3 vaiWek7eP7yf9wSnOVeAbqOl8NfI2+zhDPX0W+1V2rJg1fAFr/yAnyz5bg15Cr5HPqjp 2ThDE8qwD2JWQ99PoPYizbw5Bj7UTCkbd58u619vyxmpjiFdlLac3oPUqz0uc4mXkc0u 6H6Tp/gQnII0ukP+px4/VL2jigHIq8OimQwnwHNaVWK8jIeoXYb57TWkmG9i0YWQSHPo XGngxTPhZA0vnlTHK0y5zAAXEgCVWhUwgsBvUS0fY3R3kXn0DzIVYE9V6OB7LrT7M5Ev ys4w== 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; bh=nh9xokiPkvqctf6o6zrnNObT3/K5gBk3pqgZqJN8Tz4=; b=D24UBgFhcuozefg2BpXIl4rpAv3GYB5zzi5bzPx9rVHqiBxvqCpJAHnCu6Vfgu82jg wJNNOXsJS2+0qTPdtyBicSP6A1cAT3aQWN2THL86OQO/AMwriiAxfTZy04NXnscq2GmU l9zy/9b41Mf2yOgzEb786WeTt7O0ceMf3ysY9XU3eG0wPpq83ew8BOhcwbkNH3qXg+z0 Ihnx5Fzy5u8mrsyOTdNGbSz9Vyw782O83A+P0UcyRvP9vvgdSGfRv2hsoktNsJMrKBLZ ++CKKUjBdlyQvWU6g5LRv7T0BWVmceiQsX0bjpSPcZERc9rCJFnGOa2ivBI+7JT48t1f KXnQ== X-Gm-Message-State: AOAM531t3wAsKBXp8ja51swQlyQXjutApYGsOSqU8y2y9oEJt7CdM1tR orWxnFHIPQbgi+uV4bvxRSKXKbeLoVde5wCw X-Google-Smtp-Source: ABdhPJyYC5c2S6JHnw4GRJyIA/FO92N7v6Bf96rJ5XpQFzMfybB7o68SWtKoxjxjN01TcFxIPFOnRw== X-Received: by 2002:a5d:420b:: with SMTP id n11mr111731wrq.218.1603902523138; Wed, 28 Oct 2020 09:28:43 -0700 (PDT) Received: from localhost.localdomain ([88.122.66.28]) by smtp.gmail.com with ESMTPSA id e11sm43003wrj.75.2020.10.28.09.28.41 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Oct 2020 09:28:42 -0700 (PDT) From: Loic Poulain To: kuba@kernel.org, davem@davemloft.net, manivannan.sadhasivam@linaro.org, hemantk@codeaurora.org Cc: netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, bbhatt@codeaurora.org, willemdebruijn.kernel@gmail.com, jhugo@codeaurora.org, Loic Poulain Subject: [PATCH v8 1/2] bus: mhi: Add mhi_queue_is_full function Date: Wed, 28 Oct 2020 17:34:57 +0100 Message-Id: <1603902898-25233-1-git-send-email-loic.poulain@linaro.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This function can be used by client driver to determine whether it's possible to queue new elements in a channel ring. Signed-off-by: Loic Poulain Reviewed-by: Manivannan Sadhasivam --- v1->v5: not part of the series v6: Add this commit, used for stopping TX queue v7: no change v8: remove static change (up to the compiler) drivers/bus/mhi/core/main.c | 11 +++++++++++ include/linux/mhi.h | 7 +++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index a588eac..bab38d2 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -1173,6 +1173,17 @@ int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir, } EXPORT_SYMBOL_GPL(mhi_queue_buf); +bool mhi_queue_is_full(struct mhi_device *mhi_dev, enum dma_data_direction dir) +{ + struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl; + struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? + mhi_dev->ul_chan : mhi_dev->dl_chan; + struct mhi_ring *tre_ring = &mhi_chan->tre_ring; + + return mhi_is_ring_full(mhi_cntrl, tre_ring); +} +EXPORT_SYMBOL_GPL(mhi_queue_is_full); + int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, enum mhi_cmd_type cmd) diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 9d67e75..f72c3a4 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -745,4 +745,11 @@ int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir, int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir, struct sk_buff *skb, size_t len, enum mhi_flags mflags); +/** + * mhi_queue_is_full - Determine whether queueing new elements is possible + * @mhi_dev: Device associated with the channels + * @dir: DMA direction for the channel + */ +bool mhi_queue_is_full(struct mhi_device *mhi_dev, enum dma_data_direction dir); + #endif /* _MHI_H_ */