From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B332DC468B0 for ; Fri, 14 Jun 2019 13:48:11 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 885B620866 for ; Fri, 14 Jun 2019 13:48:11 +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="h+BXnX3J" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 885B620866 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 06836FBC; Fri, 14 Jun 2019 13:48:03 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 7965CEC3 for ; Fri, 14 Jun 2019 13:48:01 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id DDD51E5 for ; Fri, 14 Jun 2019 13:48:00 +0000 (UTC) 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=EZXX45MA5Kr/jRAVRE8+C8CWSuTwR7IM5YlBjilZCgk=; b=h+BXnX3J4b+gwgk8yPNC/LWr1d p0nnzOOFRXth82UzpFCB2ZuQda+YSnZqn1gWN/qSy0zb/PDbkxwFXXm4UiBO6y21DGjJKIpj+/E7T t81qzz/2oo9KHsBbfxcBTc0XdOWVcD8Me/I1N4dbHkRIHmscQ3E5EqrB++XzFTrpq2R8zML45F/Ps oaAmNvGeU78znGJDV3igN+bPWzpoiS+4Hp8Fqr+cK6dinRTkZnWt3NgNbOOp66Pzk7n5TbtG2mGCw 5/Tp8vxU8u23qdHv/v9KZKGd58ml8mZRHwcNFbLAEjZXspFap861gPdI5rNvUFMPWJb+9Ka6ShI2/ EDWZG46A==; Received: from 213-225-9-13.nat.highway.a1.net ([213.225.9.13] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hbmYT-0004pk-75; Fri, 14 Jun 2019 13:47:45 +0000 From: Christoph Hellwig To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Ian Abbott , H Hartley Sweeten Subject: [PATCH 04/16] drm: move drm_pci_{alloc,free} to drm_legacy Date: Fri, 14 Jun 2019 15:47:14 +0200 Message-Id: <20190614134726.3827-5-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190614134726.3827-1-hch@lst.de> References: <20190614134726.3827-1-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 Cc: devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, Intel Linux Wireless , linux-rdma@vger.kernel.org, netdev@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, "moderated list:ARM PORT" , linux-media@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org These functions are rather broken in that they try to pass __GFP_COMP to dma_alloc_coherent, call virt_to_page on the return value and mess with PageReserved. And not actually used by any modern driver. Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/drm_bufs.c | 85 ++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_pci.c | 89 -------------------------------------- 2 files changed, 85 insertions(+), 89 deletions(-) diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index bfc419ed9d6c..7418872d87c6 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -38,6 +38,91 @@ #include +/** + * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA. + * @dev: DRM device + * @size: size of block to allocate + * @align: alignment of block + * + * FIXME: This is a needless abstraction of the Linux dma-api and should be + * removed. + * + * Return: A handle to the allocated memory block on success or NULL on + * failure. + */ +drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align) +{ + drm_dma_handle_t *dmah; + unsigned long addr; + size_t sz; + + /* pci_alloc_consistent only guarantees alignment to the smallest + * PAGE_SIZE order which is greater than or equal to the requested size. + * Return NULL here for now to make sure nobody tries for larger alignment + */ + if (align > size) + return NULL; + + dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); + if (!dmah) + return NULL; + + dmah->size = size; + dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, + &dmah->busaddr, + GFP_KERNEL | __GFP_COMP); + + if (dmah->vaddr == NULL) { + kfree(dmah); + return NULL; + } + + /* XXX - Is virt_to_page() legal for consistent mem? */ + /* Reserve */ + for (addr = (unsigned long)dmah->vaddr, sz = size; + sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { + SetPageReserved(virt_to_page((void *)addr)); + } + + return dmah; +} + +/* + * Free a PCI consistent memory block without freeing its descriptor. + * + * This function is for internal use in the Linux-specific DRM core code. + */ +void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) +{ + unsigned long addr; + size_t sz; + + if (dmah->vaddr) { + /* XXX - Is virt_to_page() legal for consistent mem? */ + /* Unreserve */ + for (addr = (unsigned long)dmah->vaddr, sz = dmah->size; + sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { + ClearPageReserved(virt_to_page((void *)addr)); + } + dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr, + dmah->busaddr); + } +} + +/** + * drm_pci_free - Free a PCI consistent memory block + * @dev: DRM device + * @dmah: handle to memory block + * + * FIXME: This is a needless abstraction of the Linux dma-api and should be + * removed. + */ +void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) +{ + __drm_legacy_pci_free(dev, dmah); + kfree(dmah); +} + static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, struct drm_local_map *map) { diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c index 693748ad8b88..77a215f2a8e4 100644 --- a/drivers/gpu/drm/drm_pci.c +++ b/drivers/gpu/drm/drm_pci.c @@ -31,95 +31,6 @@ #include "drm_internal.h" #include "drm_legacy.h" -/** - * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA. - * @dev: DRM device - * @size: size of block to allocate - * @align: alignment of block - * - * FIXME: This is a needless abstraction of the Linux dma-api and should be - * removed. - * - * Return: A handle to the allocated memory block on success or NULL on - * failure. - */ -drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align) -{ - drm_dma_handle_t *dmah; - unsigned long addr; - size_t sz; - - /* pci_alloc_consistent only guarantees alignment to the smallest - * PAGE_SIZE order which is greater than or equal to the requested size. - * Return NULL here for now to make sure nobody tries for larger alignment - */ - if (align > size) - return NULL; - - dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL); - if (!dmah) - return NULL; - - dmah->size = size; - dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, - &dmah->busaddr, - GFP_KERNEL | __GFP_COMP); - - if (dmah->vaddr == NULL) { - kfree(dmah); - return NULL; - } - - /* XXX - Is virt_to_page() legal for consistent mem? */ - /* Reserve */ - for (addr = (unsigned long)dmah->vaddr, sz = size; - sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { - SetPageReserved(virt_to_page((void *)addr)); - } - - return dmah; -} - -EXPORT_SYMBOL(drm_pci_alloc); - -/* - * Free a PCI consistent memory block without freeing its descriptor. - * - * This function is for internal use in the Linux-specific DRM core code. - */ -void __drm_legacy_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) -{ - unsigned long addr; - size_t sz; - - if (dmah->vaddr) { - /* XXX - Is virt_to_page() legal for consistent mem? */ - /* Unreserve */ - for (addr = (unsigned long)dmah->vaddr, sz = dmah->size; - sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { - ClearPageReserved(virt_to_page((void *)addr)); - } - dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr, - dmah->busaddr); - } -} - -/** - * drm_pci_free - Free a PCI consistent memory block - * @dev: DRM device - * @dmah: handle to memory block - * - * FIXME: This is a needless abstraction of the Linux dma-api and should be - * removed. - */ -void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah) -{ - __drm_legacy_pci_free(dev, dmah); - kfree(dmah); -} - -EXPORT_SYMBOL(drm_pci_free); - #ifdef CONFIG_PCI static int drm_get_pci_domain(struct drm_device *dev) -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu