From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Hinds Date: Fri, 05 Oct 2001 03:55:42 +0000 Subject: Re: multiple devices behind a cardbus bridge (adding magma pci extender support) Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On Thu, Oct 04, 2001 at 10:40:25AM -0700, David Brownell wrote: > > > What do you mean by "handles the initialization"? A hot plug PCI > > > controller mainly gives control over power sequencing and isolation of > > > the PCI devices behind the controller from the rest of the PCI tree, > > > right? I'd think that this product would have to provide the same > > > functionality. > > > > Yes, you are correct. That's what I was trying to say. > > Not all PCI bridges have per-slot power control over devices > connected to them though, do they? Certainly. The PCI-to-PCI bridge in the Magma device may well be an ordinary one that provides no per-slot power control. However, the fact that it is sitting behind a cardbus bridge that does provide hot plug power control, means that as far as the kernel is concerned, this is an instance of the "general" PCI hot plug configuration problem (more like Hot Plug PCI or Compact PCI), which is fairly complex from a resource allocation perspective, as opposed to the "narrow" PCI hot plug problem that is currently addressed by the simple CardBus one-PCI-device configuration system. -- Dave _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel