From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Date: Sun, 29 Jul 2012 14:59:05 +0000 Subject: Re: Cabled PCIE device hotplug/hot-removal Message-Id: <20120729145905.GC5945@kroah.com> List-Id: References: <20120726170925.GA24751@kroah.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Shlomo Pongratz Cc: linux-pci@vger.kernel.org, linux-hotplug@vger.kernel.org On Sun, Jul 29, 2012 at 03:36:09PM +0300, Shlomo Pongratz wrote: > On Thu, Jul 26, 2012 at 8:09 PM, Greg KH wrote: > > On Thu, Jul 26, 2012 at 08:03:09PM +0300, Shlomo Pongratz wrote: > >> Hi, > >> > >> I have a PCIe device connected with cables to a host (kernel 3.5.0-rc= 7+). > >> What are the handler I need to add to a driver in order to catch cable > >> pull-out / push-in? > > > > You shouldn't need anything special, aren't you already getting probe > > and disconnect callbacks when the device is discovered and removed? >=20 > When the device is loaded the probe is called > When I "echo 1" to the remove sysfs entry the remove callback is called. > But when I power down the card no callback is called. Then I would blame your pci hotplug controller, that is its responsibility. > >> The pcisig presentation > >> "http://www.pcisig.com/developers/main/training_materials/get_document= ?doc_id=F4ca40ec1721aa7fadd05e2903b0172c36656294" > >> talks about PERST# detection for cabled PCIe hotplug. > >> > >> Does the kernel detect it? > >> > >> None of the pci_driver or pci_error_handlers callbacks were called > >> when using powered down/up the device (electrically). > > > > Do you have the pciehp driver loaded properly when this happens? >=20 > My {dot}config includes it into the kernel, i.e. > CONFIG_HOTPLUG_PCI_PCIE=3Dy And is it working properly? Does your hardware support this (i.e. your BIOS?) greg k-h