From patchwork Thu Aug 8 16:00:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11084479 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5FFC51398 for ; Thu, 8 Aug 2019 16:01:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5019A28329 for ; Thu, 8 Aug 2019 16:01:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 43D8F28706; Thu, 8 Aug 2019 16:01:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 040CA287E8 for ; Thu, 8 Aug 2019 16:01:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404157AbfHHQBE (ORCPT ); Thu, 8 Aug 2019 12:01:04 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:58392 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403889AbfHHQBE (ORCPT ); Thu, 8 Aug 2019 12:01:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ess16cPXbwlPMdQlB/xmV3Dd8N7gPnmmYAJHlhdUYyM=; b=UTQWvhiKzWRKxbwjgLpwDsLgDC mdER2aY5BkjLhbcVD3e7Qn2ZWj8gN9YmhyDOIZXRFaHCOkJqMssGtkgQ6B8/VLEOBirIPphRjIcLq tiS8OHDJu2YKmix5fXR8g6vL8uomNeUbO+m/Tuexlii7PxDRAESee02EcVtFUNHSxWkdaEdrhQGi0 K5xHqvMOWsAMX02BpcU/2C2e4OOxLMReujU0ZBGCPxq2purguCPYY2w0mLbdpOqV00tdd+PU8ms3b Vw350H8QjPAmpD/uQ1hyaDUCyLtIOKSt1smGUSm651G33drEHzlSC2shYAz/YSDZpgctQ+GzJKuMh Wzl07JIA==; Received: from [195.167.85.94] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hvkqW-0006wr-CU; Thu, 08 Aug 2019 16:00:57 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Marek Szyprowski Cc: Vladimir Murzin , Takashi Iwai , Helge Deller , Robin Murphy , Michal Simek , linux-arm-kernel@lists.infradead.org, linux-m68k@lists.linux-m68k.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 8/8] dma-mapping: remove CONFIG_ARCH_NO_COHERENT_DMA_MMAP Date: Thu, 8 Aug 2019 19:00:05 +0300 Message-Id: <20190808160005.10325-9-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190808160005.10325-1-hch@lst.de> References: <20190808160005.10325-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP CONFIG_ARCH_NO_COHERENT_DMA_MMAP is now functionally identical to !CONFIG_MMU, so remove the separate symbol. The only difference is that arm did not set it for !CONFIG_MMU, but arm uses a separate dma mapping implementation including its own mmap method, which is handled by moving the CONFIG_MMU check in dma_can_mmap so that is only applies to the dma-direct case, just as the other ifdefs for it. Signed-off-by: Christoph Hellwig Acked-by: Geert Uytterhoeven --- arch/Kconfig | 3 --- arch/c6x/Kconfig | 1 - arch/m68k/Kconfig | 1 - arch/microblaze/Kconfig | 1 - arch/sh/Kconfig | 1 - arch/xtensa/Kconfig | 1 - kernel/dma/mapping.c | 12 +++++------- 7 files changed, 5 insertions(+), 15 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index a7b57dd42c26..ec2834206d08 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -790,9 +790,6 @@ config COMPAT_32BIT_TIME This is relevant on all 32-bit architectures, and 64-bit architectures as part of compat syscall handling. -config ARCH_NO_COHERENT_DMA_MMAP - bool - config ARCH_NO_PREEMPT bool diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig index b4fb61c83494..e65e8d82442a 100644 --- a/arch/c6x/Kconfig +++ b/arch/c6x/Kconfig @@ -20,7 +20,6 @@ config C6X select OF_EARLY_FLATTREE select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA - select ARCH_NO_COHERENT_DMA_MMAP select MMU_GATHER_NO_RANGE if MMU config MMU diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index c518d695c376..614b355ae338 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -8,7 +8,6 @@ config M68K select ARCH_HAS_DMA_PREP_COHERENT if HAS_DMA && MMU && !COLDFIRE select ARCH_HAS_SYNC_DMA_FOR_DEVICE if HAS_DMA select ARCH_MIGHT_HAVE_PC_PARPORT if ISA - select ARCH_NO_COHERENT_DMA_MMAP if !MMU select ARCH_NO_PREEMPT if !COLDFIRE select BINFMT_FLAT_ARGVP_ENVP_ON_STACK select DMA_DIRECT_REMAP if HAS_DMA && MMU && !COLDFIRE diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index d411de05b628..632c9477a0f6 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -9,7 +9,6 @@ config MICROBLAZE select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_MIGHT_HAVE_PC_PARPORT - select ARCH_NO_COHERENT_DMA_MMAP if !MMU select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_EXTABLE_SORT select TIMER_OF diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 6b1b5941b618..f356ee674d89 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -5,7 +5,6 @@ config SUPERH select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_MIGHT_HAVE_PC_PARPORT - select ARCH_NO_COHERENT_DMA_MMAP if !MMU select HAVE_PATA_PLATFORM select CLKDEV_LOOKUP select DMA_DECLARE_COHERENT diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index ebc135bda921..70653aed3005 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -5,7 +5,6 @@ config XTENSA select ARCH_HAS_BINFMT_FLAT if !MMU select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE - select ARCH_NO_COHERENT_DMA_MMAP if !MMU select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS select ARCH_WANT_FRAME_POINTERS diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 64d1de59e133..fc17016b0871 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -186,7 +186,7 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { -#ifndef CONFIG_ARCH_NO_COHERENT_DMA_MMAP +#ifdef CONFIG_MMU unsigned long user_count = vma_pages(vma); unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT; unsigned long off = vma->vm_pgoff; @@ -217,7 +217,7 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, user_count << PAGE_SHIFT, vma->vm_page_prot); #else return -ENXIO; -#endif /* !CONFIG_ARCH_NO_COHERENT_DMA_MMAP */ +#endif /* CONFIG_MMU */ } /** @@ -231,12 +231,10 @@ bool dma_can_mmap(struct device *dev) { const struct dma_map_ops *ops = get_dma_ops(dev); - if (IS_ENABLED(CONFIG_ARCH_NO_COHERENT_DMA_MMAP)) - return false; - if (dma_is_direct(ops)) { - return dev_is_dma_coherent(dev) || - IS_ENABLED(CONFIG_ARCH_HAS_DMA_COHERENT_TO_PFN); + return IS_ENABLED(CONFIG_MMU) && + (dev_is_dma_coherent(dev) || + IS_ENABLED(CONFIG_ARCH_HAS_DMA_COHERENT_TO_PFN)); } return ops->mmap != NULL;