From patchwork Wed Nov 4 09:50:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11880123 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 1D87C16C1 for ; Wed, 4 Nov 2020 10:04:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F19CC221F9 for ; Wed, 4 Nov 2020 10:04:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="EEsSY1SE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728387AbgKDKEH (ORCPT ); Wed, 4 Nov 2020 05:04:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727923AbgKDKEG (ORCPT ); Wed, 4 Nov 2020 05:04:06 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70C1AC0613D3; Wed, 4 Nov 2020 02:04:06 -0800 (PST) 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=6i+ZQBC5XZcaf/YFDznwfiEdycwkjc1Y9jVRZuhej00=; b=EEsSY1SE1ycXZds8C5zXuT2rNU wEt9xgUKkJC3uwssz+wbEBCbh2683NvuBQCvVxLGjNEajY7HYVdVD+901XY7qNQj0BAQLx6O3a1HC +N5PBjEEUyS+7SUFUfpoPyjNtOeXNldty9ubIwwFp/EnDGJm5tkmw3KqsS4xX6r+CbWXe51Wsyd0n IYEEydUpwYb+w6FtFSr67Yc5ncMpTzaRJkYHT6rbATHROsHhTkMpvPhYD6R8Lw+XdwzYbhG/To7Iz 6W4fZrDN13EHcgRek1qlmkbKng5ueKtK0OeZJKm4OLtGC9mRd7knjjxFTnE962dSptKetH0WPLdAg RF+HS9/g==; Received: from 089144208145.atnat0017.highway.a1.net ([89.144.208.145] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kaFe6-0003Mp-Vm; Wed, 04 Nov 2020 10:04:03 +0000 From: Christoph Hellwig To: Jason Gunthorpe Cc: Bjorn Helgaas , Logan Gunthorpe , linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org Subject: [PATCH 5/5] dma-mapping: remove dma_virt_ops Date: Wed, 4 Nov 2020 10:50:52 +0100 Message-Id: <20201104095052.1222754-6-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201104095052.1222754-1-hch@lst.de> References: <20201104095052.1222754-1-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-rdma@vger.kernel.org Now that the RDMA core deals with devices that only do DMA mapping in lower layers properly, there is no user for dma_virt_ops and it can be removed. Signed-off-by: Christoph Hellwig --- include/linux/dma-mapping.h | 2 -- kernel/dma/Kconfig | 5 --- kernel/dma/Makefile | 1 - kernel/dma/virt.c | 61 ------------------------------------- 4 files changed, 69 deletions(-) delete mode 100644 kernel/dma/virt.c diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 956151052d4542..2aaed35b556df4 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -565,6 +565,4 @@ static inline int dma_mmap_wc(struct device *dev, int dma_direct_set_offset(struct device *dev, phys_addr_t cpu_start, dma_addr_t dma_start, u64 size); -extern const struct dma_map_ops dma_virt_ops; - #endif /* _LINUX_DMA_MAPPING_H */ diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index c99de4a2145889..fd2db2665fc691 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -75,11 +75,6 @@ config ARCH_HAS_DMA_PREP_COHERENT config ARCH_HAS_FORCE_DMA_UNENCRYPTED bool -config DMA_VIRT_OPS - bool - depends on HAS_DMA - select DMA_OPS - config SWIOTLB bool select NEED_DMA_MAP_STATE diff --git a/kernel/dma/Makefile b/kernel/dma/Makefile index dc755ab68aabf9..cd1d86358a7a62 100644 --- a/kernel/dma/Makefile +++ b/kernel/dma/Makefile @@ -5,7 +5,6 @@ obj-$(CONFIG_DMA_OPS) += ops_helpers.o obj-$(CONFIG_DMA_OPS) += dummy.o obj-$(CONFIG_DMA_CMA) += contiguous.o obj-$(CONFIG_DMA_DECLARE_COHERENT) += coherent.o -obj-$(CONFIG_DMA_VIRT_OPS) += virt.o obj-$(CONFIG_DMA_API_DEBUG) += debug.o obj-$(CONFIG_SWIOTLB) += swiotlb.o obj-$(CONFIG_DMA_COHERENT_POOL) += pool.o diff --git a/kernel/dma/virt.c b/kernel/dma/virt.c deleted file mode 100644 index 59d32317dd574a..00000000000000 --- a/kernel/dma/virt.c +++ /dev/null @@ -1,61 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * DMA operations that map to virtual addresses without flushing memory. - */ -#include -#include -#include -#include - -static void *dma_virt_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - void *ret; - - ret = (void *)__get_free_pages(gfp | __GFP_ZERO, get_order(size)); - if (ret) - *dma_handle = (uintptr_t)ret; - return ret; -} - -static void dma_virt_free(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t dma_addr, - unsigned long attrs) -{ - free_pages((unsigned long)cpu_addr, get_order(size)); -} - -static dma_addr_t dma_virt_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir, - unsigned long attrs) -{ - return (uintptr_t)(page_address(page) + offset); -} - -static int dma_virt_map_sg(struct device *dev, struct scatterlist *sgl, - int nents, enum dma_data_direction dir, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sgl, sg, nents, i) { - BUG_ON(!sg_page(sg)); - sg_dma_address(sg) = (uintptr_t)sg_virt(sg); - sg_dma_len(sg) = sg->length; - } - - return nents; -} - -const struct dma_map_ops dma_virt_ops = { - .alloc = dma_virt_alloc, - .free = dma_virt_free, - .map_page = dma_virt_map_page, - .map_sg = dma_virt_map_sg, - .alloc_pages = dma_common_alloc_pages, - .free_pages = dma_common_free_pages, -}; -EXPORT_SYMBOL(dma_virt_ops);