From patchwork Thu Sep 17 17:32:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11783183 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 710D4746 for ; Thu, 17 Sep 2020 17:45:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EC1E2065E for ; Thu, 17 Sep 2020 17:45:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="wF2bUHTV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726336AbgIQRo2 (ORCPT ); Thu, 17 Sep 2020 13:44:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726303AbgIQRng (ORCPT ); Thu, 17 Sep 2020 13:43:36 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F0CFC06174A; Thu, 17 Sep 2020 10:43:30 -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=XFljnFDti4QEsmWoOX3xJZfimZiN02p4vQEiHXyuaE4=; b=wF2bUHTVwRAUqjQnPLUqAdeev1 Vs8+S+9bqNVuPhKWEUCvUZW/XpokfEm0pIbBEvrfi+a0UHhRk7C3AHghP96WwC+uZsc9eVlvQ4i/j OTfe+JD/xA5yyTxiv3bDsG/xlJuCOIk63PYbXeuH7EvumzyDgwMMmltctRqb+TYoMJm4ddBV4i96k aLS9n0lnayRUw+zAd7tMrbWiHc30OCooC6IZikynz+J67p5S16LqSpCiHmGLGCfhOsugTX9bny/0B 11HJ5qKWwVWiikzl4prU4ksPQy7/s90nIie/TuUhm9zwlaaT8Bioc3SPY5cjeF75oKrWM9r3DFd4W ceT2V6qQ==; Received: from 089144214092.atnat0023.highway.a1.net ([89.144.214.92] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIxwK-0003We-HL; Thu, 17 Sep 2020 17:43:24 +0000 From: Christoph Hellwig To: Russell King Cc: Aaro Koskinen , Tony Lindgren , Robin Murphy , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH 4/4] ARM/dma-mapping: remove the arm specific phys to dma translation helpers Date: Thu, 17 Sep 2020 19:32:29 +0200 Message-Id: <20200917173229.3311382-5-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200917173229.3311382-1-hch@lst.de> References: <20200917173229.3311382-1-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 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Now that the two remaining architectures that hooked into the DMA translation directly use the range map instead, there is no need to override phys_to_dma and dma_to_phys. Remove asm/dma-direct.h after switching the remaining callsites to the phys addr based generic helpers instead of the PFN or virt addr based arm ones. Signed-off-by: Christoph Hellwig --- arch/arm/Kconfig | 1 - arch/arm/common/dmabounce.c | 14 +++++----- arch/arm/include/asm/dma-direct.h | 45 ------------------------------- arch/arm/mm/dma-mapping.c | 20 +++++++------- 4 files changed, 17 insertions(+), 63 deletions(-) delete mode 100644 arch/arm/include/asm/dma-direct.h diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index e00d94b1665876..2c4d608fa5fecf 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -14,7 +14,6 @@ config ARM select ARCH_HAS_MEMBARRIER_SYNC_CORE select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PTE_SPECIAL if ARM_LPAE - select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_SETUP_DMA_OPS select ARCH_HAS_SET_MEMORY select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index d3e00ea9208834..561d6d06c6b6aa 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -258,7 +258,7 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size, } dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n", - __func__, buf->ptr, virt_to_dma(dev, buf->ptr), + __func__, buf->ptr, phys_to_dma(dev, virt_to_phys(buf->ptr)), buf->safe, buf->safe_dma_addr); if ((dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) && @@ -279,7 +279,7 @@ static inline void unmap_single(struct device *dev, struct safe_buffer *buf, BUG_ON(buf->direction != dir); dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n", - __func__, buf->ptr, virt_to_dma(dev, buf->ptr), + __func__, buf->ptr, phys_to_dma(dev, virt_to_phys(buf->ptr)), buf->safe, buf->safe_dma_addr); DO_STATS(dev->archdata.dmabounce->bounce_count++); @@ -320,7 +320,7 @@ static dma_addr_t dmabounce_map_page(struct device *dev, struct page *page, dev_dbg(dev, "%s(page=%p,off=%#lx,size=%zx,dir=%x)\n", __func__, page, offset, size, dir); - dma_addr = pfn_to_dma(dev, page_to_pfn(page)) + offset; + dma_addr = phys_to_dma(dev, page_to_phys(page)) + offset; ret = needs_bounce(dev, dma_addr, size); if (ret < 0) @@ -380,8 +380,8 @@ static int __dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr, BUG_ON(buf->direction != dir); dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x off=%#lx) mapped to %p (dma=%#x)\n", - __func__, buf->ptr, virt_to_dma(dev, buf->ptr), off, - buf->safe, buf->safe_dma_addr); + __func__, buf->ptr, phys_to_dma(dev, virt_to_phys(buf->ptr)), + off, buf->safe, buf->safe_dma_addr); DO_STATS(dev->archdata.dmabounce->bounce_count++); @@ -420,8 +420,8 @@ static int __dmabounce_sync_for_device(struct device *dev, dma_addr_t addr, BUG_ON(buf->direction != dir); dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x off=%#lx) mapped to %p (dma=%#x)\n", - __func__, buf->ptr, virt_to_dma(dev, buf->ptr), off, - buf->safe, buf->safe_dma_addr); + __func__, buf->ptr, phys_to_dma(dev, virt_to_phys(buf->ptr)), + off, buf->safe, buf->safe_dma_addr); DO_STATS(dev->archdata.dmabounce->bounce_count++); diff --git a/arch/arm/include/asm/dma-direct.h b/arch/arm/include/asm/dma-direct.h deleted file mode 100644 index 84cb4e30658891..00000000000000 --- a/arch/arm/include/asm/dma-direct.h +++ /dev/null @@ -1,45 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef ASM_ARM_DMA_DIRECT_H -#define ASM_ARM_DMA_DIRECT_H 1 - -#include - -/* - * dma_to_pfn/pfn_to_dma/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. - */ -static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) -{ - if (dev->dma_range_map) - pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn))); - return (dma_addr_t)__pfn_to_phys(pfn); -} - -static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) -{ - unsigned long pfn = __phys_to_pfn(addr); - - if (dev->dma_range_map) - pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn))); - return pfn; -} - -static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) -{ - return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); -} - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - unsigned int offset = paddr & ~PAGE_MASK; - return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) -{ - unsigned int offset = dev_addr & ~PAGE_MASK; - return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; -} - -#endif /* ASM_ARM_DMA_DIRECT_H */ diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 8a8949174b1c06..9d800d0a53af7a 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -131,14 +131,14 @@ static dma_addr_t arm_dma_map_page(struct device *dev, struct page *page, { if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0) __dma_page_cpu_to_dev(page, offset, size, dir); - return pfn_to_dma(dev, page_to_pfn(page)) + offset; + return phys_to_dma(dev, page_to_phys(page)) + offset; } static dma_addr_t arm_coherent_dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, unsigned long attrs) { - return pfn_to_dma(dev, page_to_pfn(page)) + offset; + return phys_to_dma(dev, page_to_phys(page)) + offset; } /** @@ -159,7 +159,7 @@ static void arm_dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, unsigned long attrs) { if ((attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0) - __dma_page_dev_to_cpu(pfn_to_page(dma_to_pfn(dev, handle)), + __dma_page_dev_to_cpu(phys_to_page(dma_to_phys(dev, handle)), handle & ~PAGE_MASK, size, dir); } @@ -167,7 +167,7 @@ static void arm_dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { unsigned int offset = handle & (PAGE_SIZE - 1); - struct page *page = pfn_to_page(dma_to_pfn(dev, handle-offset)); + struct page *page = phys_to_page(dma_to_phys(dev, handle-offset)); __dma_page_dev_to_cpu(page, offset, size, dir); } @@ -175,7 +175,7 @@ static void arm_dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { unsigned int offset = handle & (PAGE_SIZE - 1); - struct page *page = pfn_to_page(dma_to_pfn(dev, handle-offset)); + struct page *page = phys_to_page(dma_to_phys(dev, handle-offset)); __dma_page_cpu_to_dev(page, offset, size, dir); } @@ -193,7 +193,7 @@ static int arm_dma_supported(struct device *dev, u64 mask) * Translate the device's DMA mask to a PFN limit. This * PFN number includes the page which we can DMA to. */ - return dma_to_pfn(dev, mask) >= max_dma_pfn; + return PHYS_PFN(dma_to_phys(dev, mask)) >= max_dma_pfn; } const struct dma_map_ops arm_dma_ops = { @@ -722,7 +722,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, if (page) { unsigned long flags; - *handle = pfn_to_dma(dev, page_to_pfn(page)); + *handle = phys_to_dma(dev, page_to_phys(page)); buf->virt = args.want_vaddr ? addr : page; spin_lock_irqsave(&arm_dma_bufs_lock, flags); @@ -762,7 +762,7 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, int ret = -ENXIO; unsigned long nr_vma_pages = vma_pages(vma); unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; - unsigned long pfn = dma_to_pfn(dev, dma_addr); + unsigned long pfn = PHYS_PFN(dma_to_phys(dev, dma_addr)); unsigned long off = vma->vm_pgoff; if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret)) @@ -803,7 +803,7 @@ static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t handle, unsigned long attrs, bool is_coherent) { - struct page *page = pfn_to_page(dma_to_pfn(dev, handle)); + struct page *page = phys_to_page(dma_to_phys(dev, handle)); struct arm_dma_buffer *buf; struct arm_dma_free_args args = { .dev = dev, @@ -837,7 +837,7 @@ int arm_dma_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr, dma_addr_t handle, size_t size, unsigned long attrs) { - unsigned long pfn = dma_to_pfn(dev, handle); + unsigned long pfn = PHYS_PFN(dma_to_phys(dev, handle)); struct page *page; int ret;