From patchwork Thu Sep 10 05:40:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11766633 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 81D9559D for ; Thu, 10 Sep 2020 05:41:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6081120855 for ; Thu, 10 Sep 2020 05:41:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="g3AubYaE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727090AbgIJFln (ORCPT ); Thu, 10 Sep 2020 01:41:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725912AbgIJFkx (ORCPT ); Thu, 10 Sep 2020 01:40:53 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37543C061757; Wed, 9 Sep 2020 22:40:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=AejDhfpStRmmAUITPY0SPUzsCVthQd7GlxM8LC74OlI=; b=g3AubYaE2IhosN7e0K+4N1KmwV rn4GxoQidptH+3MNhEENY+wWyzzvNKETWx5Q/0/QGMv+7FS67wwit5aQiZlqB7mdP4JcSIaWzpv4o 1o9BkbTfoYw/PMuvyXSFa8g1z8Fw7uLccQf/DRZ8N4f9GsFi1R5Ed7mJVOdBvUw6yKfvigGshALqz Wc3F1UcFwneAHHMVXl2vaazHsvlovTvZnzAecOPy/3zJNq8AW2E1FNRmE2L+lmuf7Mlw8VH2rBgHZ gRZTQZKNzhISOjQ77Er3VlfsGXclqV7O5f/zDILi7qW5cTzM6VkETrAA3D27fBGoFfAVw5POCEOMg 2TAailxQ==; Received: from [2001:4bb8:184:af1:d8d0:3027:a666:4c4e] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kGFK4-0001tP-AL; Thu, 10 Sep 2020 05:40:40 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Russell King , Santosh Shilimkar Cc: Jim Quinlan , Nathan Chancellor , Florian Fainelli , Robin Murphy , Rob Herring , Frank Rowand , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sh@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH 1/3] ARM/dma-mapping: move various helpers from dma-mapping.h to dma-direct.h Date: Thu, 10 Sep 2020 07:40:36 +0200 Message-Id: <20200910054038.324517-2-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200910054038.324517-1-hch@lst.de> References: <20200910054038.324517-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Move the helpers to translate to and from direct mapping DMA addresses to dma-direct.h. This not only is the most logical place, but the new placement also avoids dependency loops with pending commits. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- arch/arm/common/dmabounce.c | 2 +- arch/arm/include/asm/dma-direct.h | 70 ++++++++++++++++++++++++++++++ arch/arm/include/asm/dma-mapping.h | 70 ------------------------------ 3 files changed, 71 insertions(+), 71 deletions(-) diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index f4b719bde76367..d3e00ea9208834 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -24,7 +24,7 @@ #include #include #include -#include +#include #include #include #include diff --git a/arch/arm/include/asm/dma-direct.h b/arch/arm/include/asm/dma-direct.h index 7c3001a6a775bf..de0f4ff9279615 100644 --- a/arch/arm/include/asm/dma-direct.h +++ b/arch/arm/include/asm/dma-direct.h @@ -2,6 +2,76 @@ #ifndef ASM_ARM_DMA_DIRECT_H #define ASM_ARM_DMA_DIRECT_H 1 +#include + +#ifdef __arch_page_to_dma +#error Please update to __arch_pfn_to_dma +#endif + +/* + * dma_to_pfn/pfn_to_dma/dma_to_virt/virt_to_dma are architecture private + * functions used internally by the DMA-mapping API to provide DMA + * addresses. They must not be used by drivers. + */ +#ifndef __arch_pfn_to_dma +static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) +{ + if (dev) + pfn -= dev->dma_pfn_offset; + return (dma_addr_t)__pfn_to_bus(pfn); +} + +static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) +{ + unsigned long pfn = __bus_to_pfn(addr); + + if (dev) + pfn += dev->dma_pfn_offset; + + return pfn; +} + +static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) +{ + if (dev) { + unsigned long pfn = dma_to_pfn(dev, addr); + + return phys_to_virt(__pfn_to_phys(pfn)); + } + + return (void *)__bus_to_virt((unsigned long)addr); +} + +static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) +{ + if (dev) + return pfn_to_dma(dev, virt_to_pfn(addr)); + + return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); +} + +#else +static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) +{ + return __arch_pfn_to_dma(dev, pfn); +} + +static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) +{ + return __arch_dma_to_pfn(dev, addr); +} + +static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) +{ + return __arch_dma_to_virt(dev, addr); +} + +static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) +{ + return __arch_virt_to_dma(dev, addr); +} +#endif + static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) { unsigned int offset = paddr & ~PAGE_MASK; diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index bdd80ddbca3451..0a1a536368c3a4 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -8,8 +8,6 @@ #include #include -#include - #include #include @@ -23,74 +21,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return NULL; } -#ifdef __arch_page_to_dma -#error Please update to __arch_pfn_to_dma -#endif - -/* - * dma_to_pfn/pfn_to_dma/dma_to_virt/virt_to_dma are architecture private - * functions used internally by the DMA-mapping API to provide DMA - * addresses. They must not be used by drivers. - */ -#ifndef __arch_pfn_to_dma -static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) -{ - if (dev) - pfn -= dev->dma_pfn_offset; - return (dma_addr_t)__pfn_to_bus(pfn); -} - -static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) -{ - unsigned long pfn = __bus_to_pfn(addr); - - if (dev) - pfn += dev->dma_pfn_offset; - - return pfn; -} - -static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) -{ - if (dev) { - unsigned long pfn = dma_to_pfn(dev, addr); - - return phys_to_virt(__pfn_to_phys(pfn)); - } - - return (void *)__bus_to_virt((unsigned long)addr); -} - -static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) -{ - if (dev) - return pfn_to_dma(dev, virt_to_pfn(addr)); - - return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); -} - -#else -static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) -{ - return __arch_pfn_to_dma(dev, pfn); -} - -static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) -{ - return __arch_dma_to_pfn(dev, addr); -} - -static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) -{ - return __arch_dma_to_virt(dev, addr); -} - -static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) -{ - return __arch_virt_to_dma(dev, addr); -} -#endif - /** * arm_dma_alloc - allocate consistent memory for DMA * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices