From patchwork Fri Oct 16 09:20:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loic Poulain X-Patchwork-Id: 1383190 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=R5cklrAT; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CCL7l4bzQz9sTD for ; Fri, 16 Oct 2020 20:14:27 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405500AbgJPJOZ (ORCPT ); Fri, 16 Oct 2020 05:14:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2394928AbgJPJOG (ORCPT ); Fri, 16 Oct 2020 05:14:06 -0400 Received: from mail-wr1-x442.google.com (mail-wr1-x442.google.com [IPv6:2a00:1450:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07EE1C061755 for ; Fri, 16 Oct 2020 02:14:06 -0700 (PDT) Received: by mail-wr1-x442.google.com with SMTP id g12so1863704wrp.10 for ; Fri, 16 Oct 2020 02:14:05 -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=zPgdfxITgs8gt0mAU1h7JDrovjf7QLszONGP3uJ2eg4=; b=R5cklrATR9NwvY6hFmZRvJAC2SbXGXbw8Ke7+uBrVCxuVvi9wn24cD620heKv3UQtN v5YD8saxTTZEasSCCtcdXCVkFEQltFaPq2XH0TR+6P9sH+upBCxr39WP4BUsZOONrRIG HoyCOiAXVuv6shH/NnZVkNiTEA8f/MDE+YWu0UzCy4aQavL8hwtfagb6qN2LSq6HBuq1 axWJEOzMzGo3babQ8RB8Be9zvkNIeA3ZPTwhqKUK3HfTvbNkzC+B1iH6kTZTQOtsCnOZ EKYF6SkYbBdNhjPIn42Ji3jzKuu7iwGh258DhKXmhUTZwCTGtnQK5KNkc3mIXjXBBAh3 Vgbw== 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=zPgdfxITgs8gt0mAU1h7JDrovjf7QLszONGP3uJ2eg4=; b=XX8rboPcbb+9kTp1eTx2+ouBuXmW6hCHQlkFx8pdPZy4L8Iisd29PWkEDk4ppAD/7u +0qwU2/PR+H30FT2rhLfsuQeqI8pTpmPV4AWJmh+h+STfgkHAP1w0TqtHC8sGJR97otA GXRd5QFj7lcYY0dt4eLV+q+i0xzlwD9/D5FFRpFvBO3cdVorboD8+uCwNaQTH41q1HPf 7eyA1shLRYQKtSFIdMtTUc/ML/xL+jW7vkQhB673w267z8ypBznF4cStCJjVRy1FVEx4 WVFsXT8MhcLb7w/n1w/uMWO/iyhFssEsjBpr2jEy2Bn3nNF/S5AnCq6oD/CWAX564Ite kUWw== X-Gm-Message-State: AOAM533Y+HFFZ8wYpWVvb85dt/Zy3mdBEooYDkrA6LMSKPZIr1FlKdXp eBLmq+zf9Nk2LNqAuK1Aq8LhFA== X-Google-Smtp-Source: ABdhPJzXmMb80f4tr3J9Af6ZXwvKNaw5Niv1o89nrUvBcI3VNZQz0TtVQtToWNw3NQ1BtGRJxHK9og== X-Received: by 2002:a5d:40d2:: with SMTP id b18mr2796657wrq.155.1602839644642; Fri, 16 Oct 2020 02:14:04 -0700 (PDT) Received: from localhost.localdomain ([88.122.66.28]) by smtp.gmail.com with ESMTPSA id x4sm2751811wrt.93.2020.10.16.02.14.03 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Oct 2020 02:14:04 -0700 (PDT) From: Loic Poulain To: davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, hemantk@codeaurora.org, manivannan.sadhasivam@linaro.org, eric.dumazet@gmail.com, Loic Poulain Subject: [PATCH v6 1/2] bus: mhi: Add mhi_queue_is_full function Date: Fri, 16 Oct 2020 11:20:06 +0200 Message-Id: <1602840007-27140-1-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 --- v1->v5: This change is not part of the series v6: add this patch to the series drivers/bus/mhi/core/main.c | 15 +++++++++++++-- include/linux/mhi.h | 7 +++++++ 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index a588eac..44aa11f 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -943,8 +943,8 @@ void mhi_ctrl_ev_task(unsigned long data) } } -static bool mhi_is_ring_full(struct mhi_controller *mhi_cntrl, - struct mhi_ring *ring) +static inline bool mhi_is_ring_full(struct mhi_controller *mhi_cntrl, + struct mhi_ring *ring) { void *tmp = ring->wp + ring->el_size; @@ -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_ */