On Mon, Aug 08, 2016 at 07:39:01AM +0000, Koehrer Mathias (ETAS/ESW5) wrote: > Hi Bjorn, > > > On Tue, Jun 07, 2016 at 02:24:17PM +0000, Koehrer Mathias (ETAS/ESW5) wrote: > > > Some uio based PCI drivers (e.g. uio_cif) do not work if the assigned > > > PCI memory resources are not page aligned. > > > By using the kernel option "pci=resource_alignment" it is possible to > > > force single PCI boards to use page alignment for their memory resources. > > > However, this is fairly cumbersome if multiple of these boards are in > > > use as the specification of the cards has to be done via PCI > > > bus/slot/function number which might change e.g. by adding another board. > > > This patch extends the kernel option "pci=resource_alignment" to allow > > > to specify the relevant boards via PCI device/vendor (and subdevice/subvendor) > > ids. > > > The specification of the devices via device/vendor is indicated by a > > > leading string "pci:" as argument to "pci=resource_alignment". > > > The format of the specification is > > > pci:<vendor>:<device>[:<subvendor>:<subdevice>] > > > > > > Signed-off-by: Mathias Koehrer <mathias.koehrer@xxxxxxxx> > > > > > > --- > > > Documentation/kernel-parameters.txt | 2 + > > > drivers/pci/pci.c | 66 +++++++++++++++++++++++++----------- > > > 2 files changed, 49 insertions(+), 19 deletions(-) > > > > > > Index: linux-4.7-rc1/Documentation/kernel-parameters.txt > > > > > ============================================================ > > ======= > > > --- linux-4.7-rc1.orig/Documentation/kernel-parameters.txt > > > +++ linux-4.7-rc1/Documentation/kernel-parameters.txt > > > @@ -2998,6 +2998,8 @@ bytes respectively. Such letter suffixes > > > resource_alignment= > > > Format: > > > [<order of > > align>@][<domain>:]<bus>:<slot>.<func>[; ...] > > > + [<order of align>@]pci:<vendor>:<device>\ > > > + [:<subvendor>:<subdevice>][; ...] > > > > Can you include a little example here so we know whether to use "pci:8086:1234" or > > "pci:0x8086:0x1234"? > > > > Bjorn > > I have provided an example and extended the docu (sent in http://marc.info/?l=linux-pci&m=146657769505684&w=2 and http://marc.info/?l=linux-pci&m=146918412704107&w=2 ). > It would be great if you could comment on the modified patch... It looks like I applied the patch, but I forgot to include the updated documentation. Can you confirm that? If you send a documentation patch to add the example, I can add that. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
