From: Jamie Lokier <jamie@shareable.org>
To: Isaku Yamahata <yamahata@valinux.co.jp>
Cc: stefano.stabellini@eu.citrix.com, jan.kiszka@siemens.com,
"Michael S. Tsirkin" <mst@redhat.com>,
allen.m.kay@intel.com, qemu-devel@nongnu.org,
blauwirbel@gmail.com, kraxel@redhat.com, jean.guyader@gmail.com
Subject: Re: [Qemu-devel] Re: [PATCH 09/10] pci: set PCI multi-function bit appropriately.
Date: Fri, 18 Jun 2010 16:22:11 +0100 [thread overview]
Message-ID: <20100618152210.GA10919@shareable.org> (raw)
In-Reply-To: <20100618133820.GF28863@valinux.co.jp>
Isaku Yamahata wrote:
> On Fri, Jun 18, 2010 at 03:44:04PM +0300, Michael S. Tsirkin wrote:
> > If we really want the ability to put unrelated devices
> > as functions in a single one, let's just add
> > a 'multifunction' qdev property, and validate that
> > it is set appropriately.
>
> I think "unrelated" is policy. There is no obvious way to determine
> which functions can be in a same device.
> For example, popular chipset contains isa bridge, ide controller,
> usb controller, sound and modem in a single device as functions.
> It's up to hardware designer policy which functions are grouped into
> a device.
In hardware terms, quad-port ethernet controllers often present
themselves as a PCI bridge with four independent PCI ethernet
controllers, so they work with standard drivers. Even though all four
are in a single chip. Some USB devices do the same, presenting a
small bulk storage device to ship windows drivers [:roll-eyes: ;-)]
alongside the actual device.
-- Jamie
next prev parent reply other threads:[~2010-06-18 15:22 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-17 6:15 [Qemu-devel] [PATCH 00/10] pci: pci to pci bridge clean up and enhancement Isaku Yamahata
2010-06-17 6:15 ` [Qemu-devel] [PATCH 01/10] pci_bridge: split out pci bridge code into pci_bridge.c from pci.c Isaku Yamahata
2010-06-17 6:15 ` [Qemu-devel] [PATCH 02/10] qdev: export qdev_reset() for later use Isaku Yamahata
2010-06-17 7:01 ` Markus Armbruster
2010-06-17 10:05 ` [Qemu-devel] " Michael S. Tsirkin
2010-06-17 6:15 ` [Qemu-devel] [PATCH 03/10] pci: fix pci_bus_reset() with 64bit BAR and several clean ups Isaku Yamahata
2010-06-17 10:58 ` [Qemu-devel] " Michael S. Tsirkin
2010-06-17 6:15 ` [Qemu-devel] [PATCH 04/10] pci_bridge: introduce pci bridge layer Isaku Yamahata
2010-06-17 9:52 ` [Qemu-devel] " Michael S. Tsirkin
2010-06-17 6:15 ` [Qemu-devel] [PATCH 05/10] pci bridge: add helper function for ssvid capability Isaku Yamahata
2010-06-17 10:01 ` [Qemu-devel] " Michael S. Tsirkin
2010-06-17 6:15 ` [Qemu-devel] [PATCH 06/10] pci: eliminate work around in pci_device_reset() Isaku Yamahata
2010-06-17 6:15 ` [Qemu-devel] [PATCH 07/10] pci: fix pci domain registering Isaku Yamahata
2010-06-17 6:15 ` [Qemu-devel] [PATCH 08/10] pci: remove PCIDeviceInfo::header_type Isaku Yamahata
2010-06-17 6:15 ` [Qemu-devel] [PATCH 09/10] pci: set PCI multi-function bit appropriately Isaku Yamahata
2010-06-17 9:37 ` [Qemu-devel] " Michael S. Tsirkin
2010-06-18 2:40 ` Isaku Yamahata
2010-06-18 12:44 ` Michael S. Tsirkin
2010-06-18 13:38 ` Isaku Yamahata
2010-06-18 14:59 ` Michael S. Tsirkin
2010-06-18 15:22 ` Jamie Lokier [this message]
2010-06-20 10:03 ` Michael S. Tsirkin
2010-06-17 6:15 ` [Qemu-devel] [PATCH 10/10] pci: don't overwrite multi functio bit in pci header type Isaku Yamahata
2010-06-17 9:41 ` [Qemu-devel] " Michael S. Tsirkin
2010-06-17 10:02 ` [Qemu-devel] Re: [PATCH 00/10] pci: pci to pci bridge clean up and enhancement Michael S. Tsirkin
2010-06-17 11:57 ` Michael S. Tsirkin
2010-06-18 3:26 ` Isaku Yamahata
2010-06-18 12:46 ` Michael S. Tsirkin
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