From patchwork Fri Jan 19 14:13:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 764141 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 61572524A0; Fri, 19 Jan 2024 14:14:30 +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=1705673671; cv=none; b=A5TGi5JvxSgo7TbQ1sBhMe7FIOVFfsAs0auDCje0Zjwu/+BaTyty7Am7FYrsDFlkxuG4azpzEzbBR4S4TSEJB36mR9AlPAA63Km0oXaPscepZmUGQuTmhtlvPXMGSfUeIfg5fe34qHVb+erj3ts1B6Wp5MuqzMptgml0tCUl6xc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705673671; c=relaxed/simple; bh=VQlUP12x+lQZqEvOl/IoBXRKwFSDxM+N+0FlrIbqdY8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JnB3xo13iWMwZkKVryrNWAKTLcDZxlM9Pz0d4edsWA6czqTYKds5KW17TXCHYl0rGe6lswWSGI5TWXhpgWN8vC0v3tkoVhAHQiKWEn5x3DTGrJ+x76tCDqUqhgRUPYaULHSihavA5cim1jpk+OqdGKeL5lHR/zA9JI+9GZarCjE= 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=VDmw/5dm; 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="VDmw/5dm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1705673652; 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=9iIxPbs0dWlzjgcaYm0qZReABojDho1rbr0/l/s8ieo=; b=VDmw/5dmFB8a7DjV5sQY6708zGHT8cN9da4xSjKPmDqd5JoGUoAWZFLA4iBJzYVtLoeMc0 534O4/q85cvb0JyL4RkqR4fcFW36IeUqTLCBrV3EPttmKkeaTxQBZIvVT+hfm/hQr1U2rC b1Gx/QWvHOF3f7bFVi1IGm2UPpG4KrU= From: Paul Cercueil To: Greg Kroah-Hartman , Jonathan Corbet , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= Cc: Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Michael Hennerich , linux-usb@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Paul Cercueil Subject: [PATCH v5 2/6] dma-buf: udmabuf: Implement .{begin,end}_access Date: Fri, 19 Jan 2024 15:13:58 +0100 Message-ID: <20240119141402.44262-3-paul@crapouillou.net> In-Reply-To: <20240119141402.44262-1-paul@crapouillou.net> References: <20240119141402.44262-1-paul@crapouillou.net> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam: Yes Implement .begin_access() and .end_access() callbacks. For now these functions will simply sync/flush the CPU cache when needed. Signed-off-by: Paul Cercueil --- v5: New patch --- drivers/dma-buf/udmabuf.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index c40645999648..a87d89b58816 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -179,6 +179,31 @@ static int end_cpu_udmabuf(struct dma_buf *buf, return 0; } +static int begin_udmabuf(struct dma_buf_attachment *attach, + struct sg_table *sgt, + enum dma_data_direction dir) +{ + struct dma_buf *buf = attach->dmabuf; + struct udmabuf *ubuf = buf->priv; + struct device *dev = ubuf->device->this_device; + + dma_sync_sg_for_device(dev, sgt->sgl, sg_nents(sgt->sgl), dir); + return 0; +} + +static int end_udmabuf(struct dma_buf_attachment *attach, + struct sg_table *sgt, + enum dma_data_direction dir) +{ + struct dma_buf *buf = attach->dmabuf; + struct udmabuf *ubuf = buf->priv; + struct device *dev = ubuf->device->this_device; + + if (dir != DMA_TO_DEVICE) + dma_sync_sg_for_cpu(dev, sgt->sgl, sg_nents(sgt->sgl), dir); + return 0; +} + static const struct dma_buf_ops udmabuf_ops = { .cache_sgt_mapping = true, .map_dma_buf = map_udmabuf, @@ -189,6 +214,8 @@ static const struct dma_buf_ops udmabuf_ops = { .vunmap = vunmap_udmabuf, .begin_cpu_access = begin_cpu_udmabuf, .end_cpu_access = end_cpu_udmabuf, + .begin_access = begin_udmabuf, + .end_access = end_udmabuf, }; #define SEALS_WANTED (F_SEAL_SHRINK)