Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750810AbWCCWHs (ORCPT ); Fri, 3 Mar 2006 17:07:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751443AbWCCWHs (ORCPT ); Fri, 3 Mar 2006 17:07:48 -0500 Received: from dsl093-040-174.pdx1.dsl.speakeasy.net ([66.93.40.174]:39608 "EHLO aria.kroah.org") by vger.kernel.org with ESMTP id S1750810AbWCCWHr (ORCPT ); Fri, 3 Mar 2006 17:07:47 -0500 Date: Fri, 3 Mar 2006 14:07:41 -0800 From: Greg KH To: Kumar Gala Cc: Linux Kernel , linux-pci@atrey.karlin.mff.cuni.cz Subject: Re: proper way to assign fixed PCI resources to a "hotplug" device Message-ID: <20060303220741.GA22298@kroah.com> References: <9D653F4D-A375-4D2C-8A5A-063A0BBD962B@kernel.crashing.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9D653F4D-A375-4D2C-8A5A-063A0BBD962B@kernel.crashing.org> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1380 Lines: 39 On Fri, Mar 03, 2006 at 11:42:03AM -0600, Kumar Gala wrote: > I was wondering what the proper way to assign and setup a single PCI > device that comes into existence after the system has booted. I have > an FPGA that we load from user space at which time it shows up on the > PCI bus. Idealy your BIOS would set up this information :) > It has a single BAR and I need to assign it at a fixed address in PCI > MMIO space. > > All of the exported interfaces I see have to do with having the > kernel assign the BAR automatically for me. > > the following looks like what I want to do: > > bus = pci_find_bus(0, 3); > dev = pci_scan_single_device(bus, devfn); > pci_bus_alloc_resource(...); > pci_update_resource(dev, dev->resource[0], 0); > pci_bus_add_devices(bus); > > However, pci_update_resource() is not an exported symbol, so I could > replace that code with the need updates to the actual BAR. > > Is this the "right" way to go about this or is there a better > mechanism to do this. Take a look at how the compat pci hotplug driver does this, you probably just need to do the same as it. thanks, greg k-h - 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/