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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5244C433EF for ; Fri, 22 Apr 2022 06:24:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1444378AbiDVG1m (ORCPT ); Fri, 22 Apr 2022 02:27:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1444345AbiDVG1i (ORCPT ); Fri, 22 Apr 2022 02:27:38 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EE19506FC; Thu, 21 Apr 2022 23:24:45 -0700 (PDT) X-UUID: 2105a45cd1364541aa541b5f2f03d188-20220422 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.4,REQID:29a0b2db-62f2-4906-b4f0-bc243d30d1fd,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:-20,EDM:0,RT:0,SF:61,FILE:0,RULE:Release_Ham,A CTION:release,TS:41 X-CID-INFO: VERSION:1.1.4,REQID:29a0b2db-62f2-4906-b4f0-bc243d30d1fd,OB:0,LOB: 0,IP:0,URL:0,TC:0,Content:-20,EDM:0,RT:0,SF:61,FILE:0,RULE:Release_UHam,AC TION:release,TS:41 X-CID-META: VersionHash:faefae9,CLOUDID:7639beef-06b0-4305-bfbf-554bfc9d151a,C OID:8c65ce02598c,Recheck:0,SF:13|15|28|100|16|18|48|101,TC:nil,Content:0,E DM:-3,File:nil,QS:0,BEC:nil X-UUID: 2105a45cd1364541aa541b5f2f03d188-20220422 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1391016878; Fri, 22 Apr 2022 14:24:41 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 22 Apr 2022 14:24:40 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 22 Apr 2022 14:24:40 +0800 From: Mark-PK Tsai To: , , CC: , , , , , , , , , Subject: [PATCH 1/2] dma-mapping: Add dma_release_coherent_memory to DMA API Date: Fri, 22 Apr 2022 14:24:35 +0800 Message-ID: <20220422062436.14384-2-mark-pk.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220422062436.14384-1-mark-pk.tsai@mediatek.com> References: <20220422062436.14384-1-mark-pk.tsai@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add dma_release_coherent_memory to DMA API to allow dma user call it to release dev->dma_mem when the device is removed. Signed-off-by: Mark-PK Tsai --- include/linux/dma-map-ops.h | 3 +++ kernel/dma/coherent.c | 10 ++++++++-- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h index 0d5b06b3a4a6..53db9655efe9 100644 --- a/include/linux/dma-map-ops.h +++ b/include/linux/dma-map-ops.h @@ -166,6 +166,7 @@ static inline void dma_pernuma_cma_reserve(void) { } #ifdef CONFIG_DMA_DECLARE_COHERENT int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size); +void dma_release_coherent_memory(struct device *dev); int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size, dma_addr_t *dma_handle, void **ret); int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr); @@ -177,6 +178,8 @@ static inline int dma_declare_coherent_memory(struct device *dev, { return -ENOSYS; } + +#define dma_release_coherent_memory(dev) (0) #define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0) #define dma_release_from_dev_coherent(dev, order, vaddr) (0) #define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0) diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c index 375fb3c9538d..c21abc77c53e 100644 --- a/kernel/dma/coherent.c +++ b/kernel/dma/coherent.c @@ -74,7 +74,7 @@ static struct dma_coherent_mem *dma_init_coherent_memory(phys_addr_t phys_addr, return ERR_PTR(-ENOMEM); } -static void dma_release_coherent_memory(struct dma_coherent_mem *mem) +static void _dma_release_coherent_memory(struct dma_coherent_mem *mem) { if (!mem) return; @@ -126,10 +126,16 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, ret = dma_assign_coherent_memory(dev, mem); if (ret) - dma_release_coherent_memory(mem); + _dma_release_coherent_memory(mem); return ret; } +void dma_release_coherent_memory(struct device *dev) +{ + if (dev) + _dma_release_coherent_memory(dev->dma_mem); +} + static void *__dma_alloc_from_coherent(struct device *dev, struct dma_coherent_mem *mem, ssize_t size, dma_addr_t *dma_handle) -- 2.18.0