From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp03.in.ibm.com ([122.248.162.3]:47128 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755064Ab2D0J1a (ORCPT ); Fri, 27 Apr 2012 05:27:30 -0400 Received: from /spool/local by e28smtp03.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 27 Apr 2012 14:57:27 +0530 Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q3R9R6vC26607794 for ; Fri, 27 Apr 2012 14:57:07 +0530 Received: from d28av02.in.ibm.com (loopback [127.0.0.1]) by d28av02.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q3REviFf012989 for ; Sat, 28 Apr 2012 00:57:44 +1000 Date: Fri, 27 Apr 2012 17:27:04 +0800 From: Richard Yang To: linux-pci@vger.kernel.org Cc: bhelgaas@google.com Subject: Does my understanding correct? Message-ID: <20120427092704.GA22529@richard> Reply-To: Richard Yang MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-pci-owner@vger.kernel.org List-ID: All, I draw a picture about the physical layout on a part of the pci system. Each block represent a bridge or a device. Am I correct? +-----------------------------+ | | | | | Bus#2 | | ------------------ | | | | | | | | +-------------+ | |DownStream |02:00.0 pci_dev +---------------+-------+-----+ | Bus#3 ---------------+------------------------------------------+--- | | | | +---------------+-------+-----+ +---------------+----+--+-----+ | |UpStream |03:00.0 | |UpStream |03:01.0 | +-------------+ | +-------------+ a normal device | | | | | | | | | Bus#4 | | | | ------------------- | | | | +----------+ | | | |DownStream| | | +-----------------------+-----+ +-----------------------------+ | | Bus#5 ------------+------------ -- Richard Yang Help you, Help me