From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brownell Date: Thu, 04 Oct 2001 17:40:25 +0000 Subject: Re: multiple devices behind a cardbus bridge (adding magma pci 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 > > > But for hotplug PCI, you need a hotplug pci controller that handles the > > > initialization of that pci tree (among other things). For this device, > > > does it have a controller that can be addressed to do these things? > > > > 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? I was under the strong impression that most didn't, and that CompactPCI/HotplugPCI/Cardbus/... were the exceptions to the rule. And that these Magma extenders were likely pretty standard -- the pictures I saw didn't show any of the special hardware I've seen on HotplugPCI rackmounts, etc. I guess it all comes down to needing more info about the Magma card. Also a potential confusion about what "Hotplug" means; at one level it's a particular implementation of power switching on PCI (CompactPCI and Cardbus being others), and at another level it's a generic feature of the Linux PCI support that fires automatically for all correctly configured devices (assuming it's been configured in). - 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