From patchwork Fri Jun 14 13:47:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10995531 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 2E69B1395 for ; Fri, 14 Jun 2019 13:50:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1FEAA284CE for ; Fri, 14 Jun 2019 13:50:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 137AA285EA; Fri, 14 Jun 2019 13:50:28 +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 788E7285DD for ; Fri, 14 Jun 2019 13:50:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728721AbfFNNr7 (ORCPT ); Fri, 14 Jun 2019 09:47:59 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:51804 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728698AbfFNNr7 (ORCPT ); Fri, 14 Jun 2019 09:47:59 -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=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 Cc: Intel Linux Wireless , linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT), dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, linux-s390@vger.kernel.org, devel@driverdev.osuosl.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org 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 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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)