From patchwork Fri Oct 30 09:27:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loic Poulain X-Patchwork-Id: 315995 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=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 1D6C4C55179 for ; Fri, 30 Oct 2020 09:21:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AF753207DE for ; Fri, 30 Oct 2020 09:21:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="LPc6x/PF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726201AbgJ3JVh (ORCPT ); Fri, 30 Oct 2020 05:21:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725355AbgJ3JVg (ORCPT ); Fri, 30 Oct 2020 05:21:36 -0400 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5527CC0613CF for ; Fri, 30 Oct 2020 02:21:36 -0700 (PDT) Received: by mail-wm1-x344.google.com with SMTP id c18so2182285wme.2 for ; Fri, 30 Oct 2020 02:21:36 -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=eXIACbCsgyr/MQngJDpXlLDV55Dv+Q+BQ5lb/PUNeAA=; b=LPc6x/PFRbER4n5vd3RRYPuhpe3Qc8Q2AKgJUnaqXhwei26VVqBH6zqL2Gm9OUU6WC Fj+yxwOziHGZYDvcmAQ+ANDMDSVWFzGf17qvixTCeV77NG+gxzqcsKbVE0o3+4+W2pPM 1+Blg5qtdA/cUsvbsRK/8LOgIe+2e7l/iB9r5U606IR7oxVxvPvYBmVUm3ejvEtwJLUL 7pRjCq/mxVt5IpZqBnp+rh3aMQweCgL/TcWKJB2RrzfxVg/C/hve0r5ccq110E4huxJZ PljTrFYjq4CYA0+dMwnVJW3/fkgqYfXbIgFhxQE3gjn9bvEsnCFQt9ymc4Dwou6Erzxu TrDg== 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=eXIACbCsgyr/MQngJDpXlLDV55Dv+Q+BQ5lb/PUNeAA=; b=KYaVjFC5qJyS3oiAsJbkH5dJtzYJ+80W+dtbYzUuVkiRrvppPHCyuCFr2ppIiRml7R V3J4q28SvFC4lCPLT6mAQl8z6wh/N44hAP+JomJJBa4UQ5Ylph+nkGdrdLAjI0zMkgjO BNa5GAQX7DmHqjAnEXjCSsnWK4tVKfc7xXqn3nMIxiHvhwtxywinSzLqOLSaTzigXbxk sOVMbPgWxM/f/CH1AojRRbUtwrTj7DA+hnw4nTIXzIV5T69Rcw4eQ2IYeQN5t86hy9sL kSNsv181MDS1RisEtBGKDKv+AiJnSE6rLHcxrJhFmz27TcwYM5vUCbzzDh6M47QUrwKH 1BjA== X-Gm-Message-State: AOAM531eWxywvgXLpFW9gg6EqIommUFP/DoV5jAI8pdfFWuek5oApwcN 9IqHbiJ8lDwUuKdmTkYgHyldVA== X-Google-Smtp-Source: ABdhPJxXtWrRm+Xdjo6g17kYVMn6hG0CbWMd1QrFwkAJnfxyIUo7I1Tw5nyjKtYiSP0c78I+AWOAXQ== X-Received: by 2002:a7b:c20d:: with SMTP id x13mr1490585wmi.90.1604049694966; Fri, 30 Oct 2020 02:21:34 -0700 (PDT) Received: from localhost.localdomain ([88.122.66.28]) by smtp.gmail.com with ESMTPSA id c64sm3961111wme.29.2020.10.30.02.21.33 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Oct 2020 02:21:34 -0700 (PDT) From: Loic Poulain To: kuba@kernel.org, davem@davemloft.net Cc: netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, bbhatt@codeaurora.org, willemdebruijn.kernel@gmail.com, jhugo@codeaurora.org, manivannan.sadhasivam@linaro.org, hemantk@codeaurora.org, Loic Poulain Subject: [PATCH v9 1/2] bus: mhi: Add mhi_queue_is_full function Date: Fri, 30 Oct 2020 10:27:51 +0100 Message-Id: <1604050072-1197-1-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) v9: no change + Mani reviewed-by tag 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_ */