From patchwork Tue Apr 24 18:16:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 903774 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="uK3txsOk"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Vs5D1hF7z9rxx for ; Wed, 25 Apr 2018 04:18:08 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752143AbeDXSQi (ORCPT ); Tue, 24 Apr 2018 14:16:38 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:54468 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751483AbeDXSQe (ORCPT ); Tue, 24 Apr 2018 14:16:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=rxsemD1F/nYDZRh5K+VqZi2DxoxapsZOsZMsHWxfKGs=; b=uK3txsOkUJbVztbf6PXpJ1ZYx Vibm9h4dKh0a4b266U+UHRwmH/EyHVSURMJFFf1chZzfb03ONQe73TwEL8bZ9dMYJay7ymREaQjiv S8v8vozDSSyzlkjbdaa09jy4lcvljbG8xWDSyGcj7it305XYeHBgFe71MVoWnWXgPvh063Eca0JZb t1hHzy/o9mOCMSKCjuRQUncew0fajMSLoH2FhpMcgqdZUYZqIeST+P/87XDCTQf5JaFEb+PdoCtVH CYBhDeNcfyXU6FcuVOZxUXmpDkcLphzB+/stt8GYCIHtZ50DQgPuRucw6r5zGXAY+3PEe5c/ziKy4 msZUxmmXg==; Received: from 213-225-11-78.nat.highway.a1.net ([213.225.11.78] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fB2UT-0007tV-Fr; Tue, 24 Apr 2018 18:16:33 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-block@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , linux-kernel@vger.kernel.org Subject: [PATCH 1/5] scsi: reduce use of block bounce buffers Date: Tue, 24 Apr 2018 20:16:21 +0200 Message-Id: <20180424181625.22410-2-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180424181625.22410-1-hch@lst.de> References: <20180424181625.22410-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org We can rely on the dma-mapping code to handle any DMA limits that is bigger than the ISA DMA mask for us (either using an iommu or swiotlb), so remove setting the block layer bounce limit for anything but the unchecked_isa_dma case, or the bouncing for highmem pages. Signed-off-by: Christoph Hellwig --- drivers/scsi/scsi_lib.c | 24 ++---------------------- 1 file changed, 2 insertions(+), 22 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index e9b4f279d29c..e0b614c0b1e6 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2149,27 +2149,6 @@ static int scsi_map_queues(struct blk_mq_tag_set *set) return blk_mq_map_queues(set); } -static u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost) -{ - struct device *host_dev; - u64 bounce_limit = 0xffffffff; - - if (shost->unchecked_isa_dma) - return BLK_BOUNCE_ISA; - /* - * Platforms with virtual-DMA translation - * hardware have no practical limit. - */ - if (!PCI_DMA_BUS_IS_PHYS) - return BLK_BOUNCE_ANY; - - host_dev = scsi_get_device(shost); - if (host_dev && host_dev->dma_mask) - bounce_limit = (u64)dma_max_pfn(host_dev) << PAGE_SHIFT; - - return bounce_limit; -} - void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) { struct device *dev = shost->dma_dev; @@ -2189,7 +2168,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) } blk_queue_max_hw_sectors(q, shost->max_sectors); - blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost)); + if (shost->unchecked_isa_dma) + blk_queue_bounce_limit(q, BLK_BOUNCE_ISA); blk_queue_segment_boundary(q, shost->dma_boundary); dma_set_seg_boundary(dev, shost->dma_boundary); From patchwork Tue Apr 24 18:16:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 903776 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="RosOVvaP"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Vs5f2j1dz9rxx for ; Wed, 25 Apr 2018 04:18:30 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752970AbeDXSSJ (ORCPT ); Tue, 24 Apr 2018 14:18:09 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:54482 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751990AbeDXSQh (ORCPT ); Tue, 24 Apr 2018 14:16:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=W/I2mxTovESZMRD8O84EDFuf7iR7AllptNfq6JX3Vqw=; b=RosOVvaPSJ5XK2HWpbwbudccS A26t7iHLKyLb1u6PU7W3tFytmD4WyRfdev33OepQyErlbzYrxfX9UsOGLyFQoOZCH7vspJZVH6iTG bCO91SGo2NOhYBO2rv9e7Jjv9S9cBywFU7rD5QliNB8niuIk6kjc7/cUKxFy01IN8w9O/fLuq1kZg gao5CC45++6lUcrmMfRlPyYe2mnod8kFng2VP1QCQ0TOB15maorNqFXr2A8kJAV87PaC4Nv2Bkj0b 3V+mLbE2t24BdKSvGH+UkJeaZgTNfl1DdhibnQfOk/ZzSqor0v1CCacWGE1GOVlbj4b35zSbDsxJB ZvcCyqCHA==; Received: from 213-225-11-78.nat.highway.a1.net ([213.225.11.78] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fB2UW-0007to-F1; Tue, 24 Apr 2018 18:16:36 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-block@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , linux-kernel@vger.kernel.org Subject: [PATCH 2/5] ide: kill ide_toggle_bounce Date: Tue, 24 Apr 2018 20:16:22 +0200 Message-Id: <20180424181625.22410-3-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180424181625.22410-1-hch@lst.de> References: <20180424181625.22410-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org ide_toggle_bounce did select various strange block bounce limits, including not bouncing at all as soon as an iommu is present in the system. Given that the dma_map routines now handle any required bounce buffering except for ISA DMA, and the ide code already must handle either ISA DMA or highmem at least for iommu equipped systems we can get rid of the block layer bounce limit setting entirely. Signed-off-by: Christoph Hellwig Reviewed-by: Jens Axboe --- drivers/ide/ide-dma.c | 2 -- drivers/ide/ide-lib.c | 26 -------------------------- drivers/ide/ide-probe.c | 3 --- include/linux/ide.h | 2 -- 4 files changed, 33 deletions(-) diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index 54d4d78ca46a..6f344654ef22 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -180,7 +180,6 @@ EXPORT_SYMBOL_GPL(ide_dma_unmap_sg); void ide_dma_off_quietly(ide_drive_t *drive) { drive->dev_flags &= ~IDE_DFLAG_USING_DMA; - ide_toggle_bounce(drive, 0); drive->hwif->dma_ops->dma_host_set(drive, 0); } @@ -211,7 +210,6 @@ EXPORT_SYMBOL(ide_dma_off); void ide_dma_on(ide_drive_t *drive) { drive->dev_flags |= IDE_DFLAG_USING_DMA; - ide_toggle_bounce(drive, 1); drive->hwif->dma_ops->dma_host_set(drive, 1); } diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c index e1180fa46196..78cb79eddc8b 100644 --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -6,32 +6,6 @@ #include #include -/** - * ide_toggle_bounce - handle bounce buffering - * @drive: drive to update - * @on: on/off boolean - * - * Enable or disable bounce buffering for the device. Drives move - * between PIO and DMA and that changes the rules we need. - */ - -void ide_toggle_bounce(ide_drive_t *drive, int on) -{ - u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */ - - if (!PCI_DMA_BUS_IS_PHYS) { - addr = BLK_BOUNCE_ANY; - } else if (on && drive->media == ide_disk) { - struct device *dev = drive->hwif->dev; - - if (dev && dev->dma_mask) - addr = *dev->dma_mask; - } - - if (drive->queue) - blk_queue_bounce_limit(drive->queue, addr); -} - u64 ide_get_lba_addr(struct ide_cmd *cmd, int lba48) { struct ide_taskfile *tf = &cmd->tf; diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 2019e66eada7..8d8ed036ca0a 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -805,9 +805,6 @@ static int ide_init_queue(ide_drive_t *drive) /* assign drive queue */ drive->queue = q; - /* needs drive->queue to be set */ - ide_toggle_bounce(drive, 1); - return 0; } diff --git a/include/linux/ide.h b/include/linux/ide.h index ca9d34feb572..11f0dd03a4b4 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -1508,8 +1508,6 @@ static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data) hwif->hwif_data = data; } -extern void ide_toggle_bounce(ide_drive_t *drive, int on); - u64 ide_get_lba_addr(struct ide_cmd *, int); u8 ide_dump_status(ide_drive_t *, const char *, u8); From patchwork Tue Apr 24 18:16:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 903771 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="MeeaZPI3"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Vs4D4rWjz9rxx for ; Wed, 25 Apr 2018 04:17:16 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752788AbeDXSQy (ORCPT ); Tue, 24 Apr 2018 14:16:54 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:54510 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752583AbeDXSQl (ORCPT ); Tue, 24 Apr 2018 14:16:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=3H6ureYUH3p5r6/APl0HXqLF0wCW7SwbCOdAS2NAqtE=; b=MeeaZPI3nCvlIuZNkzmVyGjbj nTjP04i7ROf6+bF/tlChjB+B13QLrgr7WFKiiNVB5c8dRn6H6k0x8Xx/fOLZcuNjwJKa+61BJ1PyQ Zm3vnKCasaKWfjCk2CD/VtEpm9KwF5TXwFjV0an89bWKDlsBLJuwirKvFBtennXpUxeDqXn0Z901H b/PUFxB8Qz4gC5bIOaWUfzqj5ILOBgLULQCvHlSIZLYh2CoTMjtlHDNVHOYtFuM9U8GWjB0DgLG0I 5r24oUHiSR9MA0gIdyOrYWfBsPdWYnt+njydlFWHD+MmYk3mEhhVmVuMxZWsKBPPXCI/kiz2r4goc cET1qIfPg==; Received: from 213-225-11-78.nat.highway.a1.net ([213.225.11.78] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fB2UZ-0007uF-G8; Tue, 24 Apr 2018 18:16:40 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-block@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , linux-kernel@vger.kernel.org Subject: [PATCH 3/5] ide: remove the PCI_DMA_BUS_IS_PHYS check Date: Tue, 24 Apr 2018 20:16:23 +0200 Message-Id: <20180424181625.22410-4-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180424181625.22410-1-hch@lst.de> References: <20180424181625.22410-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org We now have ways to deal with drainage in the block layer, and libata has been using it for ages. We also want to get rid of PCI_DMA_BUS_IS_PHYS now, so just reduce the PCI transfer size for ide - anyone who cares for performance on PCI controllers should have switched to libata long ago. Signed-off-by: Christoph Hellwig --- drivers/ide/ide-probe.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 8d8ed036ca0a..56d7bc228cb3 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -796,8 +796,7 @@ static int ide_init_queue(ide_drive_t *drive) * This will be fixed once we teach pci_map_sg() about our boundary * requirements, hopefully soon. *FIXME* */ - if (!PCI_DMA_BUS_IS_PHYS) - max_sg_entries >>= 1; + max_sg_entries >>= 1; #endif /* CONFIG_PCI */ blk_queue_max_segments(q, max_sg_entries); From patchwork Tue Apr 24 18:16:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 903768 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="b7zxE+Sn"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Vs3p50qWz9s06 for ; Wed, 25 Apr 2018 04:16:54 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752782AbeDXSQv (ORCPT ); Tue, 24 Apr 2018 14:16:51 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:54662 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752570AbeDXSQq (ORCPT ); Tue, 24 Apr 2018 14:16:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=KlxMKw+Rzf7FezAgjFaRUO8wZ40tsu7MAPlRGxE9Duw=; b=b7zxE+SnZTs4q1UZYLTIS56uX ahv8cF07ZNRNCmA8JjNQVBDgToiJ+JhtNY514CizFwIT7CWXWUaFeLBPxu7CU3GtLiOS9I4EaghkU Wb/Rgw3NeQVsL57GkZpqrcbzQ+C57ZPNpxWlCqa4b+ImkXAmO4joTcQZT5Vaql3cD+aPk7gZ5HOGh VOZhkrM8Gm9vNedxGL8YsXlwsEI4POtX/MrFFcINsEPxl9LTJoXx0Q3lbqCipR92dDjrsA8V2yHlS mtcZzvNHIrLjcqCO0VchC4C7OrnFjd+fOYtAsw09Fk9xPcG0G5WTM5mNc2y5hs/B9oXeSGhP/QtJI c5Tj3kMBg==; Received: from 213-225-11-78.nat.highway.a1.net ([213.225.11.78] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fB2Uc-0007uv-ME; Tue, 24 Apr 2018 18:16:43 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-block@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , linux-kernel@vger.kernel.org Subject: [PATCH 4/5] net: remove the PCI_DMA_BUS_IS_PHYS check in illegal_highdma Date: Tue, 24 Apr 2018 20:16:24 +0200 Message-Id: <20180424181625.22410-5-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180424181625.22410-1-hch@lst.de> References: <20180424181625.22410-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org These days the dma mapping routines must be able to handle any address supported by the device, be that using an iommu, or swiotlb if none is supported. With that the PCI_DMA_BUS_IS_PHYS check in illegal_highdma is not needed and can be removed. Signed-off-by: Christoph Hellwig --- net/core/dev.c | 20 +------------------- 1 file changed, 1 insertion(+), 19 deletions(-) diff --git a/net/core/dev.c b/net/core/dev.c index af0558b00c6c..060256cbf4f3 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2884,11 +2884,7 @@ void netdev_rx_csum_fault(struct net_device *dev) EXPORT_SYMBOL(netdev_rx_csum_fault); #endif -/* Actually, we should eliminate this check as soon as we know, that: - * 1. IOMMU is present and allows to map all the memory. - * 2. No high memory really exists on this machine. - */ - +/* XXX: check that highmem exists at all on the given machine. */ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb) { #ifdef CONFIG_HIGHMEM @@ -2902,20 +2898,6 @@ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb) return 1; } } - - if (PCI_DMA_BUS_IS_PHYS) { - struct device *pdev = dev->dev.parent; - - if (!pdev) - return 0; - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; - dma_addr_t addr = page_to_phys(skb_frag_page(frag)); - - if (!pdev->dma_mask || addr + PAGE_SIZE - 1 > *pdev->dma_mask) - return 1; - } - } #endif return 0; } From patchwork Tue Apr 24 18:16:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 903773 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="T8Bp2grS"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Vs4x5W7dz9rxx for ; Wed, 25 Apr 2018 04:17:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751417AbeDXSRc (ORCPT ); Tue, 24 Apr 2018 14:17:32 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:54808 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752670AbeDXSQt (ORCPT ); Tue, 24 Apr 2018 14:16:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=5Zpfj6V6BbONYbIjqWYN3eeCGZeMWj3UUQM34DJIc7s=; b=T8Bp2grSE0bZX1LH/gUbnbQim 2ekg9mJI04pnPUbvHnMAVqiyllVWgdNgjmHCwuQ9UmfWXXidEsNmnigAriBcxKl57UIxgYfb4iInW 5TBzJ4lRp4gK5dEf96MIRkd18psRtOpY/pXkhiqYZt93dxY0pKZs+WurUJJCAMGWFsYmldblEKbHj r65R9j5mWQZ54G680dDmDOPDD5POIOaZ+GoW0/E7uMAz+5Xdz7RUp3snxJl8hCZLVVOCXp20dvoGz Nr1pOQLWrhSh9zSbCtG61wSVUuOnz7Lo04//5KwXQtGmvJXw7elzTltTiS0IgEKD8dJ5/IfpueD4/ IAM0DRG8w==; Received: from 213-225-11-78.nat.highway.a1.net ([213.225.11.78] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fB2Uf-0007vx-QR; Tue, 24 Apr 2018 18:16:46 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-block@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , linux-kernel@vger.kernel.org Subject: [PATCH 5/5] PCI: remove PCI_DMA_BUS_IS_PHYS Date: Tue, 24 Apr 2018 20:16:25 +0200 Message-Id: <20180424181625.22410-6-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180424181625.22410-1-hch@lst.de> References: <20180424181625.22410-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig Acked-by: Palmer Dabbelt (For the RISC-V change) --- arch/alpha/include/asm/pci.h | 5 ----- arch/arc/include/asm/pci.h | 6 ------ arch/arm/include/asm/pci.h | 7 ------- arch/arm64/include/asm/pci.h | 5 ----- arch/h8300/include/asm/pci.h | 2 -- arch/hexagon/kernel/dma.c | 1 - arch/ia64/hp/common/sba_iommu.c | 3 --- arch/ia64/include/asm/pci.h | 17 ----------------- arch/ia64/kernel/setup.c | 12 ------------ arch/ia64/sn/kernel/io_common.c | 5 ----- arch/m68k/include/asm/pci.h | 6 ------ arch/microblaze/include/asm/pci.h | 6 ------ arch/mips/include/asm/pci.h | 7 ------- arch/parisc/include/asm/pci.h | 23 ----------------------- arch/parisc/kernel/setup.c | 5 ----- arch/powerpc/include/asm/pci.h | 18 ------------------ arch/riscv/include/asm/pci.h | 3 --- arch/s390/include/asm/pci.h | 2 -- arch/s390/pci/pci_dma.c | 2 -- arch/sh/include/asm/pci.h | 6 ------ arch/sh/kernel/dma-nommu.c | 1 - arch/sparc/include/asm/pci_32.h | 4 ---- arch/sparc/include/asm/pci_64.h | 6 ------ arch/x86/include/asm/pci.h | 3 --- arch/xtensa/include/asm/pci.h | 2 -- drivers/parisc/ccio-dma.c | 2 -- drivers/parisc/sba_iommu.c | 2 -- include/asm-generic/pci.h | 8 -------- include/linux/dma-mapping.h | 1 - lib/dma-direct.c | 1 - tools/virtio/linux/dma-mapping.h | 2 -- 31 files changed, 173 deletions(-) diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h index b9ec55351924..cf6bc1e64d66 100644 --- a/arch/alpha/include/asm/pci.h +++ b/arch/alpha/include/asm/pci.h @@ -56,11 +56,6 @@ struct pci_controller { /* IOMMU controls. */ -/* The PCI address space does not equal the physical memory address space. - The networking and block device layers use this boolean for bounce buffer - decisions. */ -#define PCI_DMA_BUS_IS_PHYS 0 - /* TODO: integrate with include/asm-generic/pci.h ? */ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) { diff --git a/arch/arc/include/asm/pci.h b/arch/arc/include/asm/pci.h index ba56c23c1b20..4ff53c041c64 100644 --- a/arch/arc/include/asm/pci.h +++ b/arch/arc/include/asm/pci.h @@ -16,12 +16,6 @@ #define PCIBIOS_MIN_MEM 0x100000 #define pcibios_assign_all_busses() 1 -/* - * The PCI address space does equal the physical memory address space. - * The networking and block device layers use this boolean for bounce - * buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS 1 #endif /* __KERNEL__ */ diff --git a/arch/arm/include/asm/pci.h b/arch/arm/include/asm/pci.h index 1f0de808d111..0abd389cf0ec 100644 --- a/arch/arm/include/asm/pci.h +++ b/arch/arm/include/asm/pci.h @@ -19,13 +19,6 @@ static inline int pci_proc_domain(struct pci_bus *bus) } #endif /* CONFIG_PCI_DOMAINS */ -/* - * The PCI address space does equal the physical memory address space. - * The networking and block device layers use this boolean for bounce - * buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (1) - #define HAVE_PCI_MMAP #define ARCH_GENERIC_PCI_MMAP_RESOURCE diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h index 8747f7c5e0e7..9e690686e8aa 100644 --- a/arch/arm64/include/asm/pci.h +++ b/arch/arm64/include/asm/pci.h @@ -18,11 +18,6 @@ #define pcibios_assign_all_busses() \ (pci_has_flag(PCI_REASSIGN_ALL_BUS)) -/* - * PCI address space differs from physical memory address space - */ -#define PCI_DMA_BUS_IS_PHYS (0) - #define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 extern int isa_dma_bridge_buggy; diff --git a/arch/h8300/include/asm/pci.h b/arch/h8300/include/asm/pci.h index 7c9e55d62215..d4d345a52092 100644 --- a/arch/h8300/include/asm/pci.h +++ b/arch/h8300/include/asm/pci.h @@ -15,6 +15,4 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) /* We don't do dynamic PCI IRQ allocation */ } -#define PCI_DMA_BUS_IS_PHYS (1) - #endif /* _ASM_H8300_PCI_H */ diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c index ad8347c29dcf..77459df34e2e 100644 --- a/arch/hexagon/kernel/dma.c +++ b/arch/hexagon/kernel/dma.c @@ -208,7 +208,6 @@ const struct dma_map_ops hexagon_dma_ops = { .sync_single_for_cpu = hexagon_sync_single_for_cpu, .sync_single_for_device = hexagon_sync_single_for_device, .mapping_error = hexagon_mapping_error, - .is_phys = 1, }; void __init hexagon_dma_init(void) diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c index aec4a3354abe..6f05aba9012f 100644 --- a/arch/ia64/hp/common/sba_iommu.c +++ b/arch/ia64/hp/common/sba_iommu.c @@ -1845,9 +1845,6 @@ static void ioc_init(unsigned long hpa, struct ioc *ioc) ioc_resource_init(ioc); ioc_sac_init(ioc); - if ((long) ~iovp_mask > (long) ia64_max_iommu_merge_mask) - ia64_max_iommu_merge_mask = ~iovp_mask; - printk(KERN_INFO PFX "%s %d.%d HPA 0x%lx IOVA space %dMb at 0x%lx\n", ioc->name, (ioc->rev >> 4) & 0xF, ioc->rev & 0xF, diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h index b1d04e8bafc8..780e8744ba85 100644 --- a/arch/ia64/include/asm/pci.h +++ b/arch/ia64/include/asm/pci.h @@ -30,23 +30,6 @@ struct pci_vector_struct { #define PCIBIOS_MIN_IO 0x1000 #define PCIBIOS_MIN_MEM 0x10000000 -/* - * PCI_DMA_BUS_IS_PHYS should be set to 1 if there is _necessarily_ a direct - * correspondence between device bus addresses and CPU physical addresses. - * Platforms with a hardware I/O MMU _must_ turn this off to suppress the - * bounce buffer handling code in the block and network device layers. - * Platforms with separate bus address spaces _must_ turn this off and provide - * a device DMA mapping implementation that takes care of the necessary - * address translation. - * - * For now, the ia64 platforms which may have separate/multiple bus address - * spaces all have I/O MMUs which support the merging of physically - * discontiguous buffers, so we can use that as the sole factor to determine - * the setting of PCI_DMA_BUS_IS_PHYS. - */ -extern unsigned long ia64_max_iommu_merge_mask; -#define PCI_DMA_BUS_IS_PHYS (ia64_max_iommu_merge_mask == ~0UL) - #define HAVE_PCI_MMAP #define ARCH_GENERIC_PCI_MMAP_RESOURCE #define arch_can_pci_mmap_wc() 1 diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index dee56bcb993d..ad43cbf70628 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -123,18 +123,6 @@ unsigned long ia64_i_cache_stride_shift = ~0; #define CACHE_STRIDE_SHIFT 5 unsigned long ia64_cache_stride_shift = ~0; -/* - * The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) - 1). This - * mask specifies a mask of address bits that must be 0 in order for two buffers to be - * mergeable by the I/O MMU (i.e., the end address of the first buffer and the start - * address of the second buffer must be aligned to (merge_mask+1) in order to be - * mergeable). By default, we assume there is no I/O MMU which can merge physically - * discontiguous buffers, so we set the merge_mask to ~0UL, which corresponds to a iommu - * page-size of 2^64. - */ -unsigned long ia64_max_iommu_merge_mask = ~0UL; -EXPORT_SYMBOL(ia64_max_iommu_merge_mask); - /* * We use a special marker for the end of memory and it uses the extra (+1) slot */ diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c index 11f2275570fb..8479e9a7ce16 100644 --- a/arch/ia64/sn/kernel/io_common.c +++ b/arch/ia64/sn/kernel/io_common.c @@ -480,11 +480,6 @@ sn_io_early_init(void) tioca_init_provider(); tioce_init_provider(); - /* - * This is needed to avoid bounce limit checks in the blk layer - */ - ia64_max_iommu_merge_mask = ~PAGE_MASK; - sn_irq_lh_init(); INIT_LIST_HEAD(&sn_sysdata_list); sn_init_cpei_timer(); diff --git a/arch/m68k/include/asm/pci.h b/arch/m68k/include/asm/pci.h index ef26fae8cf0b..5a4bc223743b 100644 --- a/arch/m68k/include/asm/pci.h +++ b/arch/m68k/include/asm/pci.h @@ -4,12 +4,6 @@ #include -/* The PCI address space does equal the physical memory - * address space. The networking and block device layers use - * this boolean for bounce buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (1) - #define pcibios_assign_all_busses() 1 #define PCIBIOS_MIN_IO 0x00000100 diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h index 5de871eb4a59..00337861472e 100644 --- a/arch/microblaze/include/asm/pci.h +++ b/arch/microblaze/include/asm/pci.h @@ -62,12 +62,6 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus, #define HAVE_PCI_LEGACY 1 -/* The PCI address space does equal the physical memory - * address space (no IOMMU). The IDE and SCSI device layers use - * this boolean for bounce buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (1) - extern void pcibios_claim_one_bus(struct pci_bus *b); extern void pcibios_finish_adding_to_bus(struct pci_bus *bus); diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h index 2339f42f047a..436099883022 100644 --- a/arch/mips/include/asm/pci.h +++ b/arch/mips/include/asm/pci.h @@ -121,13 +121,6 @@ extern unsigned long PCIBIOS_MIN_MEM; #include #include -/* - * The PCI address space does equal the physical memory address space. - * The networking and block device layers use this boolean for bounce - * buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (1) - #ifdef CONFIG_PCI_DOMAINS_GENERIC static inline int pci_proc_domain(struct pci_bus *bus) { diff --git a/arch/parisc/include/asm/pci.h b/arch/parisc/include/asm/pci.h index 96b7deec512d..3328fd17c19d 100644 --- a/arch/parisc/include/asm/pci.h +++ b/arch/parisc/include/asm/pci.h @@ -87,29 +87,6 @@ struct pci_hba_data { #define PCI_F_EXTEND 0UL #endif /* !CONFIG_64BIT */ -/* - * If the PCI device's view of memory is the same as the CPU's view of memory, - * PCI_DMA_BUS_IS_PHYS is true. The networking and block device layers use - * this boolean for bounce buffer decisions. - */ -#ifdef CONFIG_PA20 -/* All PA-2.0 machines have an IOMMU. */ -#define PCI_DMA_BUS_IS_PHYS 0 -#define parisc_has_iommu() do { } while (0) -#else - -#if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA) -extern int parisc_bus_is_phys; /* in arch/parisc/kernel/setup.c */ -#define PCI_DMA_BUS_IS_PHYS parisc_bus_is_phys -#define parisc_has_iommu() do { parisc_bus_is_phys = 0; } while (0) -#else -#define PCI_DMA_BUS_IS_PHYS 1 -#define parisc_has_iommu() do { } while (0) -#endif - -#endif /* !CONFIG_PA20 */ - - /* ** Most PCI devices (eg Tulip, NCR720) also export the same registers ** to both MMIO and I/O port space. Due to poor performance of I/O Port diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c index 0e9675f857a5..8d3a7b80ac42 100644 --- a/arch/parisc/kernel/setup.c +++ b/arch/parisc/kernel/setup.c @@ -58,11 +58,6 @@ struct proc_dir_entry * proc_runway_root __read_mostly = NULL; struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; -#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)) -int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */ -EXPORT_SYMBOL(parisc_bus_is_phys); -#endif - void __init setup_cmdline(char **cmdline_p) { extern unsigned int boot_args[]; diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h index 401c62aad5e4..2af9ded80540 100644 --- a/arch/powerpc/include/asm/pci.h +++ b/arch/powerpc/include/asm/pci.h @@ -92,24 +92,6 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus, #define HAVE_PCI_LEGACY 1 -#ifdef CONFIG_PPC64 - -/* The PCI address space does not equal the physical memory address - * space (we have an IOMMU). The IDE and SCSI device layers use - * this boolean for bounce buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (0) - -#else /* 32-bit */ - -/* The PCI address space does equal the physical memory - * address space (no IOMMU). The IDE and SCSI device layers use - * this boolean for bounce buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (1) - -#endif /* CONFIG_PPC64 */ - extern void pcibios_claim_one_bus(struct pci_bus *b); extern void pcibios_finish_adding_to_bus(struct pci_bus *bus); diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h index 0f2fc9ef20fc..b3638c505728 100644 --- a/arch/riscv/include/asm/pci.h +++ b/arch/riscv/include/asm/pci.h @@ -26,9 +26,6 @@ /* RISC-V shim does not initialize PCI bus */ #define pcibios_assign_all_busses() 1 -/* We do not have an IOMMU */ -#define PCI_DMA_BUS_IS_PHYS 1 - extern int isa_dma_bridge_buggy; #ifdef CONFIG_PCI diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index 12fe3591034f..94f8db468c9b 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -2,8 +2,6 @@ #ifndef __ASM_S390_PCI_H #define __ASM_S390_PCI_H -/* must be set before including asm-generic/pci.h */ -#define PCI_DMA_BUS_IS_PHYS (0) /* must be set before including pci_clp.h */ #define PCI_BAR_COUNT 6 diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index 2d15d84c20ed..10abf5ed6187 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -685,8 +685,6 @@ const struct dma_map_ops s390_pci_dma_ops = { .map_page = s390_dma_map_pages, .unmap_page = s390_dma_unmap_pages, .mapping_error = s390_mapping_error, - /* if we support direct DMA this must be conditional */ - .is_phys = 0, /* dma_supported is unconditionally true without a callback */ }; EXPORT_SYMBOL_GPL(s390_pci_dma_ops); diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h index 0033f0df2b3b..10a36b1cf2ea 100644 --- a/arch/sh/include/asm/pci.h +++ b/arch/sh/include/asm/pci.h @@ -71,12 +71,6 @@ extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM; * SuperH has everything mapped statically like x86. */ -/* The PCI address space does equal the physical memory - * address space. The networking and block device layers use - * this boolean for bounce buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) - #ifdef CONFIG_PCI /* * None of the SH PCI controllers support MWI, it is always treated as a diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c index 178457d7620c..3e3a32fc676e 100644 --- a/arch/sh/kernel/dma-nommu.c +++ b/arch/sh/kernel/dma-nommu.c @@ -78,7 +78,6 @@ const struct dma_map_ops nommu_dma_ops = { .sync_single_for_device = nommu_sync_single_for_device, .sync_sg_for_device = nommu_sync_sg_for_device, #endif - .is_phys = 1, }; void __init no_iommu_init(void) diff --git a/arch/sparc/include/asm/pci_32.h b/arch/sparc/include/asm/pci_32.h index 98917e48727d..cfc0ee9476c6 100644 --- a/arch/sparc/include/asm/pci_32.h +++ b/arch/sparc/include/asm/pci_32.h @@ -17,10 +17,6 @@ #define PCI_IRQ_NONE 0xffffffff -/* Dynamic DMA mapping stuff. - */ -#define PCI_DMA_BUS_IS_PHYS (0) - #endif /* __KERNEL__ */ #ifndef CONFIG_LEON_PCI diff --git a/arch/sparc/include/asm/pci_64.h b/arch/sparc/include/asm/pci_64.h index 671274e36cfa..fac77813402c 100644 --- a/arch/sparc/include/asm/pci_64.h +++ b/arch/sparc/include/asm/pci_64.h @@ -17,12 +17,6 @@ #define PCI_IRQ_NONE 0xffffffff -/* The PCI address space does not equal the physical memory - * address space. The networking and block device layers use - * this boolean for bounce buffer decisions. - */ -#define PCI_DMA_BUS_IS_PHYS (0) - /* PCI IOMMU mapping bypass support. */ /* PCI 64-bit addressing works for all slots on all controller diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h index d32175e30259..662963681ea6 100644 --- a/arch/x86/include/asm/pci.h +++ b/arch/x86/include/asm/pci.h @@ -117,9 +117,6 @@ void native_restore_msi_irqs(struct pci_dev *dev); #define native_setup_msi_irqs NULL #define native_teardown_msi_irq NULL #endif - -#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) - #endif /* __KERNEL__ */ #ifdef CONFIG_X86_64 diff --git a/arch/xtensa/include/asm/pci.h b/arch/xtensa/include/asm/pci.h index d5a82153a7c5..6ddf0a30c60d 100644 --- a/arch/xtensa/include/asm/pci.h +++ b/arch/xtensa/include/asm/pci.h @@ -42,8 +42,6 @@ extern struct pci_controller* pcibios_alloc_controller(void); * decisions. */ -#define PCI_DMA_BUS_IS_PHYS (1) - /* Tell PCI code what kind of PCI resource mappings we support */ #define HAVE_PCI_MMAP 1 #define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c index acba1f56af3e..2b129d8525d5 100644 --- a/drivers/parisc/ccio-dma.c +++ b/drivers/parisc/ccio-dma.c @@ -1596,8 +1596,6 @@ static int __init ccio_probe(struct parisc_device *dev) } #endif ioc_count++; - - parisc_has_iommu(); return 0; } diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c index 0a9c762a70fa..a58c586ebd81 100644 --- a/drivers/parisc/sba_iommu.c +++ b/drivers/parisc/sba_iommu.c @@ -2017,8 +2017,6 @@ static int __init sba_driver_callback(struct parisc_device *dev) proc_create("sba_iommu", 0, root, &sba_proc_fops); proc_create("sba_iommu-bitmap", 0, root, &sba_proc_bitmap_fops); #endif - - parisc_has_iommu(); return 0; } diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h index 830d7659289b..6bb3cd3d695a 100644 --- a/include/asm-generic/pci.h +++ b/include/asm-generic/pci.h @@ -14,12 +14,4 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) } #endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */ -/* - * By default, assume that no iommu is in use and that the PCI - * space is mapped to address physical 0. - */ -#ifndef PCI_DMA_BUS_IS_PHYS -#define PCI_DMA_BUS_IS_PHYS (1) -#endif - #endif /* _ASM_GENERIC_PCI_H */ diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 14269d25498b..25a9a2b04f78 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -133,7 +133,6 @@ struct dma_map_ops { #ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK u64 (*get_required_mask)(struct device *dev); #endif - int is_phys; }; extern const struct dma_map_ops dma_direct_ops; diff --git a/lib/dma-direct.c b/lib/dma-direct.c index bbfb229aa067..ebfee14ed2df 100644 --- a/lib/dma-direct.c +++ b/lib/dma-direct.c @@ -180,6 +180,5 @@ const struct dma_map_ops dma_direct_ops = { .map_sg = dma_direct_map_sg, .dma_supported = dma_direct_supported, .mapping_error = dma_direct_mapping_error, - .is_phys = 1, }; EXPORT_SYMBOL(dma_direct_ops); diff --git a/tools/virtio/linux/dma-mapping.h b/tools/virtio/linux/dma-mapping.h index 1571e24e9494..f91aeb5fe571 100644 --- a/tools/virtio/linux/dma-mapping.h +++ b/tools/virtio/linux/dma-mapping.h @@ -6,8 +6,6 @@ # error Virtio userspace code does not support CONFIG_HAS_DMA #endif -#define PCI_DMA_BUS_IS_PHYS 1 - enum dma_data_direction { DMA_BIDIRECTIONAL = 0, DMA_TO_DEVICE = 1,