From patchwork Fri Mar 8 17:00:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 13587082 Received: from aposti.net (aposti.net [89.234.176.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0665B1D69D; Fri, 8 Mar 2024 17:01:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.234.176.197 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709917292; cv=none; b=kw87Gk5rrr4/eoMaOaYQc7jd0LfaP0V1XGdZQIewk+SvunvPYCOaBG/UT9XOhIe7eISazJnJR7LvOdk49gKjFJBK/bcdtMm8Nb2TS+K0Ngri1F20QJrSvGgjDmQX27OqXqmNo8lAzlVZJLj67167AR2H1mj9Tz5X+FWDPFNR5mY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709917292; c=relaxed/simple; bh=ZhmvVT6lU67dXoutG2KJiVlBeMvZhpUdEWXzTsc46aU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aH3IfVMtQamBTqRPoYk+oqy4wzErwA2pjNByrE+3nHgh68OQMnxJzl6T/PTwOCvxqTiXq7a5PONEGG+mWF1NooOtf2kVtiFGeHA+gkzUydfEwsMhXLCwDb9mYFqHr7IYGHINxHvJjzTUYsWYRaHR6tgX+Ws8hGG0b6I5+WPTYIQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=crapouillou.net; spf=pass smtp.mailfrom=crapouillou.net; dkim=pass (1024-bit key) header.d=crapouillou.net header.i=@crapouillou.net header.b=mOcr7cNW; arc=none smtp.client-ip=89.234.176.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=crapouillou.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=crapouillou.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=crapouillou.net header.i=@crapouillou.net header.b="mOcr7cNW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1709917269; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PjvoUKlgmpVRFBTxXrdnvi/nwXFX/U+mB+guf1J9iJo=; b=mOcr7cNWn98JJqHjq6VB5WdiijfbR38BDGCiwRyyVq/dwoqf+XLF3rGlCk1NyC7OtXKXmW LYh1dptaWBjAw5uHMNf3isp1wZqZZOJ0t+oZVd/m1lR1A+MNyHygGyMudAlT8jKuL3BYY4 ApWHgXtrpGzRR+30emlAH/FO9pOw0ww= From: Paul Cercueil To: Jonathan Cameron , =?utf-8?q?Christian_K=C3=B6nig?= , Jonathan Corbet , Lars-Peter Clausen , Vinod Koul , Sumit Semwal Cc: Nuno Sa , Michael Hennerich , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, linux-iio@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Paul Cercueil Subject: [PATCH v8 2/6] dmaengine: dma-axi-dmac: Implement device_prep_peripheral_dma_vec Date: Fri, 8 Mar 2024 18:00:42 +0100 Message-ID: <20240308170046.92899-3-paul@crapouillou.net> In-Reply-To: <20240308170046.92899-1-paul@crapouillou.net> References: <20240308170046.92899-1-paul@crapouillou.net> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add implementation of the .device_prep_peripheral_dma_vec() callback. Signed-off-by: Paul Cercueil Signed-off-by: Nuno Sa --- v3: New patch v5: Implement .device_prep_slave_dma_vec() instead of v3's .device_prep_slave_dma_array(). v6: Use new prototype for axi_dmac_alloc_desc() as it changed upstream. v7: Adapted patch for the changes made in patch 1. --- drivers/dma/dma-axi-dmac.c | 40 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 4e339c04fc1e..d03cbf1d28e8 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -620,6 +620,45 @@ static struct axi_dmac_sg *axi_dmac_fill_linear_sg(struct axi_dmac_chan *chan, return sg; } +static struct dma_async_tx_descriptor * +axi_dmac_prep_peripheral_dma_vec(struct dma_chan *c, const struct dma_vec *vecs, + size_t nb, enum dma_transfer_direction direction, + unsigned long prep_flags, unsigned long flags) +{ + struct axi_dmac_chan *chan = to_axi_dmac_chan(c); + struct axi_dmac_desc *desc; + unsigned int num_sgs = 0; + struct axi_dmac_sg *dsg; + size_t i; + + if (direction != chan->direction) + return NULL; + + for (i = 0; i < nb; i++) + num_sgs += DIV_ROUND_UP(vecs[i].len, chan->max_length); + + desc = axi_dmac_alloc_desc(chan, num_sgs); + if (!desc) + return NULL; + + dsg = desc->sg; + + for (i = 0; i < nb; i++) { + if (!axi_dmac_check_addr(chan, vecs[i].addr) || + !axi_dmac_check_len(chan, vecs[i].len)) { + kfree(desc); + return NULL; + } + + dsg = axi_dmac_fill_linear_sg(chan, direction, vecs[i].addr, 1, + vecs[i].len, dsg); + } + + desc->cyclic = false; + + return vchan_tx_prep(&chan->vchan, &desc->vdesc, prep_flags); +} + static struct dma_async_tx_descriptor *axi_dmac_prep_slave_sg( struct dma_chan *c, struct scatterlist *sgl, unsigned int sg_len, enum dma_transfer_direction direction, @@ -1055,6 +1094,7 @@ static int axi_dmac_probe(struct platform_device *pdev) dma_dev->device_tx_status = dma_cookie_status; dma_dev->device_issue_pending = axi_dmac_issue_pending; dma_dev->device_prep_slave_sg = axi_dmac_prep_slave_sg; + dma_dev->device_prep_peripheral_dma_vec = axi_dmac_prep_peripheral_dma_vec; dma_dev->device_prep_dma_cyclic = axi_dmac_prep_dma_cyclic; dma_dev->device_prep_interleaved_dma = axi_dmac_prep_interleaved; dma_dev->device_terminate_all = axi_dmac_terminate_all;