From patchwork Mon Feb 11 13:35:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10805809 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 CBC271575 for ; Mon, 11 Feb 2019 13:37:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA10A29EEB for ; Mon, 11 Feb 2019 13:37:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AE2F52A4AE; Mon, 11 Feb 2019 13:37:09 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SUSPICIOUS_RECIPS autolearn=ham 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 5019429EEB for ; Mon, 11 Feb 2019 13:37:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727799AbfBKNhH (ORCPT ); Mon, 11 Feb 2019 08:37:07 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:47736 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728148AbfBKNgb (ORCPT ); Mon, 11 Feb 2019 08:36:31 -0500 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=kHv07RO/ngeVD0MskaRXdcNaSdwFKKqN7y8s8LEfCNA=; b=uhrLKOKuwnH5KX77gyHYN/v3Rh 9Rr4l5MbkcZKYIvsPi3aTtaXpKR7YWZkELiP0w81boKUpWsMeA3Gbf2Z1miu+h0DTuRgOVo2y+UvD Vd5jWbbqUUDW3mjqe12LtbGWlWki8ClMoclJf24qm1CEmiu0xVYY54jTkBhhkmhMhbOYVINf8vj3J rwndVrx3ZtgjkxCnxN49njtwUo599OOHrA51uihdxDKcLt7ua3ztKanRqWHWrULWwMnaaYBzz/Rgx bR4QgNoMJNJ31riFwPKIapuoKGIk4DjlMiemZ76hWw/geWgRhzI53lDirWbBeGSaK+Jem/HDExBQ1 8A3ETI0A==; Received: from 089144210182.atnat0019.highway.a1.net ([89.144.210.182] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtBkz-0000G0-BA; Mon, 11 Feb 2019 13:36:21 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: Greg Kroah-Hartman , Lee Jones , x86@kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 08/12] dma-mapping: remove dma_mark_declared_memory_occupied Date: Mon, 11 Feb 2019 14:35:50 +0100 Message-Id: <20190211133554.30055-9-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190211133554.30055-1-hch@lst.de> References: <20190211133554.30055-1-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-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This API is not used anywhere, so remove it. Signed-off-by: Christoph Hellwig --- Documentation/DMA-API.txt | 17 ----------------- include/linux/dma-mapping.h | 9 --------- kernel/dma/coherent.c | 23 ----------------------- 3 files changed, 49 deletions(-) diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index 78114ee63057..b9d0cba83877 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -605,23 +605,6 @@ unconditionally having removed all the required structures. It is the driver's job to ensure that no parts of this memory region are currently in use. -:: - - void * - dma_mark_declared_memory_occupied(struct device *dev, - dma_addr_t device_addr, size_t size) - -This is used to occupy specific regions of the declared space -(dma_alloc_coherent() will hand out the first free region it finds). - -device_addr is the *device* address of the region requested. - -size is the size (and should be a page-sized multiple). - -The return value will be either a pointer to the processor virtual -address of the memory, or an error (via PTR_ERR()) if any part of the -region is occupied. - Part III - Debug drivers use of the DMA-API ------------------------------------------- diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index fde0cfc71824..9df0f4d318c5 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -735,8 +735,6 @@ static inline int dma_get_cache_alignment(void) int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags); void dma_release_declared_memory(struct device *dev); -void *dma_mark_declared_memory_occupied(struct device *dev, - dma_addr_t device_addr, size_t size); #else static inline int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, @@ -749,13 +747,6 @@ static inline void dma_release_declared_memory(struct device *dev) { } - -static inline void * -dma_mark_declared_memory_occupied(struct device *dev, - dma_addr_t device_addr, size_t size) -{ - return ERR_PTR(-EBUSY); -} #endif /* CONFIG_DMA_DECLARE_COHERENT */ static inline void *dmam_alloc_coherent(struct device *dev, size_t size, diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c index 4b76aba574c2..1d12a31af6d7 100644 --- a/kernel/dma/coherent.c +++ b/kernel/dma/coherent.c @@ -137,29 +137,6 @@ void dma_release_declared_memory(struct device *dev) } EXPORT_SYMBOL(dma_release_declared_memory); -void *dma_mark_declared_memory_occupied(struct device *dev, - dma_addr_t device_addr, size_t size) -{ - struct dma_coherent_mem *mem = dev->dma_mem; - unsigned long flags; - int pos, err; - - size += device_addr & ~PAGE_MASK; - - if (!mem) - return ERR_PTR(-EINVAL); - - spin_lock_irqsave(&mem->spinlock, flags); - pos = PFN_DOWN(device_addr - dma_get_device_base(dev, mem)); - err = bitmap_allocate_region(mem->bitmap, pos, get_order(size)); - spin_unlock_irqrestore(&mem->spinlock, flags); - - if (err != 0) - return ERR_PTR(err); - return mem->virt_base + (pos << PAGE_SHIFT); -} -EXPORT_SYMBOL(dma_mark_declared_memory_occupied); - static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem, ssize_t size, dma_addr_t *dma_handle) {