From patchwork Wed Sep 19 13:17:11 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sethi Varun-B16395 X-Patchwork-Id: 185036 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id 1B1C02C06F6 for ; Wed, 19 Sep 2012 23:22:11 +1000 (EST) Received: from co1outboundpool.messaging.microsoft.com (co1ehsobe005.messaging.microsoft.com [216.32.180.188]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 6394A2C00CD for ; Wed, 19 Sep 2012 23:20:47 +1000 (EST) Received: from mail158-co1-R.bigfish.com (10.243.78.233) by CO1EHSOBE016.bigfish.com (10.243.66.79) with Microsoft SMTP Server id 14.1.225.23; Wed, 19 Sep 2012 13:20:41 +0000 Received: from mail158-co1 (localhost [127.0.0.1]) by mail158-co1-R.bigfish.com (Postfix) with ESMTP id 3F5AA700200 for ; Wed, 19 Sep 2012 13:20:41 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 1 X-BigFish: VS1(zzd6f1izz1202h1d1ah1d2ahzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h1155h) Received: from mail158-co1 (localhost.localdomain [127.0.0.1]) by mail158-co1 (MessageSwitch) id 1348060839288940_25087; Wed, 19 Sep 2012 13:20:39 +0000 (UTC) Received: from CO1EHSMHS028.bigfish.com (unknown [10.243.78.234]) by mail158-co1.bigfish.com (Postfix) with ESMTP id 3F5DF440048 for ; Wed, 19 Sep 2012 13:20:39 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CO1EHSMHS028.bigfish.com (10.243.66.38) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 19 Sep 2012 13:20:36 +0000 Received: from tx30smr01.am.freescale.net (10.81.153.31) by 039-SN1MMR1-004.039d.mgd.msft.net (10.84.1.14) with Microsoft SMTP Server (TLS) id 14.2.309.3; Wed, 19 Sep 2012 08:20:34 -0500 Received: from nmglablinux27.zin33.ap.freescale.net ([10.213.130.145]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id q8JDKXeF001917 for ; Wed, 19 Sep 2012 06:20:34 -0700 Received: from nmglablinux27.zin33.ap.freescale.net (localhost [127.0.0.1]) by nmglablinux27.zin33.ap.freescale.net (8.14.4/8.14.4/Debian-2ubuntu1) with ESMTP id q8JDHYLC013048; Wed, 19 Sep 2012 18:47:34 +0530 Received: (from varuns@localhost) by nmglablinux27.zin33.ap.freescale.net (8.14.4/8.14.4/Submit) id q8JDHYjZ013047; Wed, 19 Sep 2012 18:47:34 +0530 From: To: , , , Subject: [RFC][PATCH 2/3] iommu/fsl: Add iommu domain attributes required by fsl PAMU driver. Date: Wed, 19 Sep 2012 18:47:11 +0530 Message-ID: <1348060632-12997-3-git-send-email-b16395@freescale.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1348060632-12997-1-git-send-email-b16395@freescale.com> References: <1348060632-12997-1-git-send-email-b16395@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.net Cc: Varun Sethi X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Varun Sethi Added the following domain attributes required by FSL PAMU driver: 1. Subwindows field added to the iommu domain geometry attribute. 2. Added new iommu stash attribute, which allows setting of the LIODN specific stash id parameter through IOMMU API. 3. Added an attribute for enabling/disabling DMA to a particular memory window. Signed-off-by: Varun Sethi --- include/linux/iommu.h | 30 ++++++++++++++++++++++++++++++ 1 files changed, 30 insertions(+), 0 deletions(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 7e83370..eaa40c6 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -44,6 +44,28 @@ struct iommu_domain_geometry { dma_addr_t aperture_start; /* First address that can be mapped */ dma_addr_t aperture_end; /* Last address that can be mapped */ bool force_aperture; /* DMA only allowed in mappable range? */ + + /* The subwindows field indicates number of DMA subwindows supported + * by the geometry. Following is the interpretation of + * values for this field: + * 0 : This implies that the supported geometry size is 1 MB + * with each subwindow size being 4KB. Thus number of subwindows + * being = 1MB/4KB = 256. + * 1 : Only one DMA window i.e. no subwindows. + * value other than 0 or 1 would indicate actual number of subwindows. + */ + u32 subwindows; +}; + +/* This attribute corresponds to IOMMUs capable of generating + * a stash transaction. A stash transaction is typically a + * hardware initiated prefetch of data from memory to cache. + * This attribute allows configuring stashig specific parameters + * in the IOMMU hardware. + */ +struct iommu_stash_attribute { + u32 cpu; /* cpu number */ + u32 cache; /* cache to stash to: L1,L2,L3 */ }; struct iommu_domain { @@ -60,6 +82,14 @@ struct iommu_domain { enum iommu_attr { DOMAIN_ATTR_MAX, DOMAIN_ATTR_GEOMETRY, + /* Set the IOMMU hardware stashing + * parameters. + */ + DOMAIN_ATTR_STASH, + /* Explicity enable/disable DMA for a + * particular memory window. + */ + DOMAIN_ATTR_ENABLE, }; #ifdef CONFIG_IOMMU_API