Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754289Ab3GAOfm (ORCPT ); Mon, 1 Jul 2013 10:35:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:8970 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751499Ab3GAOfl (ORCPT ); Mon, 1 Jul 2013 10:35:41 -0400 Message-ID: <1372689326.30572.788.camel@ul30vt.home> Subject: Re: [PATCH 3/3 v18] iommu/fsl: Freescale PAMU driver and iommu implementation. From: Alex Williamson To: Varun Sethi Cc: joro@8bytes.org, iommu@lists.linux-foundation.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, benh@kernel.crashing.org, galak@kernel.crashing.org, stuart.yoder@freescale.com, scottwood@freescale.com, Timur Tabi Date: Mon, 01 Jul 2013 08:35:26 -0600 In-Reply-To: <1372673475-20929-1-git-send-email-Varun.Sethi@freescale.com> References: <1372673475-20929-1-git-send-email-Varun.Sethi@freescale.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2099 Lines: 40 On Mon, 2013-07-01 at 15:41 +0530, Varun Sethi wrote: > Following is a brief description of the PAMU hardware: > PAMU determines what action to take and whether to authorize the action on > the basis of the memory address, a Logical IO Device Number (LIODN), and > PAACT table (logically) indexed by LIODN and address. Hardware devices which > need to access memory must provide an LIODN in addition to the memory address. > > Peripheral Access Authorization and Control Tables (PAACTs) are the primary > data structures used by PAMU. A PAACT is a table of peripheral access > authorization and control entries (PAACE).Each PAACE defines the range of > I/O bus address space that is accessible by the LIOD and the associated access > capabilities. > > There are two types of PAACTs: primary PAACT (PPAACT) and secondary PAACT > (SPAACT).A given physical I/O device may be able to act as one or more > independent logical I/O devices (LIODs). Each such logical I/O device is > assigned an identifier called logical I/O device number (LIODN). A LIODN is > allocated a contiguous portion of the I/O bus address space called the DSA window > for performing DSA operations. The DSA window may optionally be divided into > multiple sub-windows, each of which may be used to map to a region in system > storage space. The first sub-window is referred to as the primary sub-window > and the remaining are called secondary sub-windows. > > This patch provides the PAMU driver (fsl_pamu.c) and the corresponding IOMMU > API implementation (fsl_pamu_domain.c). The PAMU hardware driver (fsl_pamu.c) > has been derived from the work done by Ashish Kalra and Timur Tabi. > > Signed-off-by: Timur Tabi > Signed-off-by: Varun Sethi > --- For iommu group support Acked-by: Alex Williamson -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/