From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 B597FC74A42 for ; Thu, 11 Jul 2019 05:33:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5482F21019 for ; Thu, 11 Jul 2019 05:33:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727922AbfGKFdx (ORCPT ); Thu, 11 Jul 2019 01:33:53 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:58882 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725963AbfGKFdw (ORCPT ); Thu, 11 Jul 2019 01:33:52 -0400 X-UUID: 327af44e836944e1adb3d59daca23acd-20190711 X-UUID: 327af44e836944e1adb3d59daca23acd-20190711 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1269385009; Thu, 11 Jul 2019 13:33:46 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 11 Jul 2019 13:33:44 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 11 Jul 2019 13:33:44 +0800 From: To: Christoph Hellwig , Marek Szyprowski , Robin Murphy CC: , , , , Miles Chen Subject: [PATCH] kernel/dma: export dma_alloc_from_contiguous to modules Date: Thu, 11 Jul 2019 13:33:43 +0800 Message-ID: <20190711053343.28873-1-miles.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Miles Chen This change exports dma_alloc_from_contiguous and dma_release_from_contiguous to modules. Currently, we can add a reserve a memory node in dts files, make it a CMA memory by setting compatible = "shared-dma-pool", and setup the dev->cma_area by using of_reserved_mem_device_init_by_idx(). Export dma_alloc_from_contiguous and dma_release_from_contiguous, so we can allocate/free from/to dev->cma_area in kernel modules. Signed-off-by: Miles Chen --- kernel/dma/contiguous.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index b2a87905846d..d5920bdedc77 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -197,6 +197,7 @@ struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, return cma_alloc(dev_get_cma_area(dev), count, align, no_warn); } +EXPORT_SYMBOL_GPL(dma_alloc_from_contiguous); /** * dma_release_from_contiguous() - release allocated pages @@ -213,6 +214,7 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages, { return cma_release(dev_get_cma_area(dev), pages, count); } +EXPORT_SYMBOL_GPL(dma_release_from_contiguous); /* * Support for reserved memory regions defined in device tree -- 2.18.0